CN102278322A - Manual/automatic switching device and process interlocking method for fan stationary blade - Google Patents
Manual/automatic switching device and process interlocking method for fan stationary blade Download PDFInfo
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- CN102278322A CN102278322A CN2011102156487A CN201110215648A CN102278322A CN 102278322 A CN102278322 A CN 102278322A CN 2011102156487 A CN2011102156487 A CN 2011102156487A CN 201110215648 A CN201110215648 A CN 201110215648A CN 102278322 A CN102278322 A CN 102278322A
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Abstract
The invention relates to the field of automatic control of blast furnace blowers, disclosing a manual/automatic switching device and a process interlocking method for a fan stationary blade. The manual/automatic switching device of the fan stationary blade is used for receiving a signal output by a process interlocking logic unit; when the fan normal operates, the manual/automatic switching device of the fan stationary blade is positioned at the automatic level and a stationary blade servo valve outputs a signal to directly control the fan stationary blade; when a fan stationary blade control system loop has faults, a manual/automatic switching solenoid is controlled by using the process interlocking signal to be switched to a manual position; and a signal output by the stationary blade servo valve has little action, thus the fan stationary blade is operated by manually increasing or reducing buttons. According to the manual/automatic switching device and the process interlocking method for the fan stationary blade, which are disclosed by the invention, the mistuning of the fan stationary blade caused by faults of the fan stationary blade control system loop can be prevented and the fan is prevented from being surged so as to protect the fan blade; and accidents such as slag irritation and stamping of a blast furnace and the like are avoided, so that the fan stationary blade control system is safer and more reliable.
Description
Technical field
The present invention relates to the blast furnace blower automation field.
Background technique
Generally, blast furnace blower stator blade control does not have stator blade hand/automatic switching control equipment on the spot by deciding air quantity/decide the blast regulator output signal or the DCS system control signal is directly controlled the stator blade servovalve; Or stator blade hand/automatic switching control equipment on the spot arranged, just be used to debug the blower fan stator blade, do not participate in the technology interlocking directly, when having arbitrary equipment to break down in stator blade control system loop or the DCS system, all will cause the imbalance of blower fan stator blade, outlet air quantity, the blast of blower fan will produce big ups and downs, influence blast furnace production, and the serious blower fan stator blade that also may cause damages.
Summary of the invention
Technical problem to be solved by this invention provides a kind of stator blade hand/automatic switching control equipment that participates in the technology interlocked control, it is arranged between the stator blade servovalve and blower fan stator blade in the blower fan stator blade control system, and be connected with the output signal of technology interlock logic unit, thereby be subjected to the control of stator blade servovalve and technology interlock logic element output signal simultaneously, when break down in blower fan stator blade control system loop, can be with the hand on technology interlocking signal control stator blade hand/automatic switching control equipment/conversion electromagnetic valve switches to manual position by automatic position automatically, at this moment, the blower fan stator blade is in blocking, can be by manually increasing, subtracting the manual stator blade of fingertip control increases, subtract solenoid valve manually-operable blower fan stator blade, effectively prevent the blower fan stator blade imbalance that stator blade control system loop fault causes, avoid irritating slag because of the imbalance of blower fan stator blade causes blast furnace, accidents such as punching press make the operation of blower fan stator blade control system more stable, safe and reliable.
For solving the problems of the technologies described above, the invention provides a kind of blower fan stator blade hand/automatic switching control equipment, comprise that hand/automatic conversion electromagnetic valve, manual stator blade increase solenoid valve, manually stator blade increases button, manual stator blade minimizing solenoid valve, manually stator blade reduces button;
The input end of the conversion electromagnetic valve of described hand/automatically is connected with stator blade servovalve, technology interlock logic unit in the blower fan stator blade control system respectively;
Described manual stator blade increase button connects described manual stator blade increases solenoid valve, and manually the manual stator blade that the stator blade hand/automatic conversion electromagnetic valve is connected in the technology interlock logic unit of stator blade increase solenoid valve access blower fan stator blade control system increases control loop;
Described manual stator blade minimizing button connects described manual stator blade and reduces solenoid valve, and manually the manual stator blade that the stator blade hand/automatic conversion electromagnetic valve is connected in the technology interlock logic unit of stator blade minimizing solenoid valve access blower fan stator blade control system reduces control loop.
Improvement project to above-mentioned fondational structure is to comprise also that on the spot manually stator blade increases control knob and manual on the spot stator blade minimizing control knob;
Described manual on the spot stator blade increases control knob and is connected with described manual stator blade increase solenoid valve;
Described manual on the spot stator blade reduces control knob and is connected with described manual stator blade minimizing solenoid valve;
Manually stator blade increase control knob and manual on the spot stator blade minimizing control knob are arranged at the working site on the spot, and described manual stator blade increases button, manually stator blade minimizing button is arranged in the control room.
The inventor also provides a kind of method of controlling the blower fan stator blade control system technology interlocking of above-mentioned stator blade hand/automatic switching control equipment, and described blower fan stator blade control system comprises: DCS system, stator blade manual operating device, stator blade servocontroller, stator blade servovalve, stator blade position transmitter, technology interlock logic unit; Described DCS system is provided with alarm unit; Described technology interlock logic unit comprises: stator blade hand/automatic selector switch, stator blade hand/automatic conversion electromagnetic valve; It is characterized in that,
Connect audible-visual annunciator at the output terminal of described technology interlock logic unit, or, the output terminal of technology interlock logic unit is connected the alarm unit of described DCS system;
When blower fan stator blade control system in the auto state running, judge whether to reach condition with manual mode control stator blade:
Condition one, operator beat the stator blade hand/automatic selector switch in the described technology interlock logic unit and manually drop into the position;
Condition two, described technology interlock logic unit receive that described stator blade servocontroller sends, and send to the information that the control signal of stator blade servocontroller is lost by described stator blade manual operating device or DCS system;
Condition three, technology interlock logic unit receive that the stator blade servocontroller sends, and send to the information that the stator blade position feed back signal of stator blade servocontroller is lost by being arranged at position transmitter on the blower fan stator blade;
Condition four, technology interlock logic unit receive that DCS system reverse current protection unit or reverse current protection device send, and send to the reverse current protection signal that DCS system reverse current protection unit or reverse current protection device produce by the fans entrance differential pressure switch;
Condition five, technology interlock logic unit receives that the DCS system sends, by the DCS system servocontroller output signal and the stator blade position feed back signal that is arranged at the position transmitter output on the blower fan stator blade are compared, when both deviates surpass setting value, the servocontroller output signal of generation and the big information of stator blade position feed back signal deviation;
When satisfying condition for the moment, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send described DCS system alarm unit to report to the police;
Step 3: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position;
When one of satisfied other conditions except that condition one, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send described DCS alarm unit system alarm;
Step 3: when operator know that according to alarm signal condition with manual mode control stator blade satisfies, the described stator blade hand/automatic selector switch in the technology interlock logic unit in the blower fan stator blade control system is switched to manual inputs by automatic input position;
Step 4: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position.
Said method is carried out optimized technical scheme is, in the condition one of described step 1, stator blade hand/automatic selector switch in the blower fan stator blade control system in the technology interlock logic unit automatically drops into the position and is manually dropping into the position when switching mutually, and its time lag is 1 to 2 minute.
Said method is carried out further optimized technical scheme is, the setting value described in the condition five of described step 1 is 8% to 12%.
Make further to said method that optimized technical scheme is, the span of the setting value described in the condition five of described step 1 is 8% to 10%.
Beneficial effect of the present invention is:
1. the invention provides a kind of stator blade hand/automatic switching control equipment that participates in blower fan stator blade technology interlocking, it is arranged between the stator blade servovalve and blower fan stator blade in the blower fan stator blade control system, and be connected with the output signal of technology interlock logic unit, thereby be subjected to the control of stator blade servovalve and technology interlock logic element output signal simultaneously.When blower fan normally moved, the hand of stator blade hand/automatic switching control equipment/conversion electromagnetic valve was in automatic position automatically, and stator blade servovalve output signal is directly controlled the blower fan stator blade; When break down in blower fan stator blade control system loop, can switch to manual position by automatic position with the hand/automatic conversion electromagnetic valve of technology interlock logic unit controls stator blade hand/automatic switching control equipment, stator blade servovalve output signal is inoperative, manually increase, subtract button or manually increase, subtract the manual stator blade increase solenoid valve of fingertip control on the spot or manual stator blade minimizing solenoid valve change blower fan stator blade position by the control room, make blower fan stator blade control system when switching to the manual method of operation by the automatic method of operation, can also manually control the blower fan stator blade, and not influence fan operation.
2. the present invention also provides a kind of method of controlling the blower fan stator blade technology interlocking of stator blade hand/automatic switching control equipment.This method can be with equipment (stator blade regulator in the blower fan stator blade control system loop; the stator blade manual operating device; DCS system stator blade control signal; the stator blade servocontroller; the stator blade servovalve; the stator blade position transmitter) participates in blower fan stator blade technology interlocked control directly; in the time of effectively guaranteeing to have arbitrary equipment to break down in blower fan stator blade control system loop or the DCS stator blade control system; stator blade hand/automatic switching control equipment all will automatically switch to " manually " control bit by " automatically " control bit; break away from faulty equipment in the control system; in time lock the blower fan stator blade; not only do not influence blast furnace production; can also prevent the blower fan surge, the protection fan blade is not damaged.
3. the present invention can be when stator blade hand/automatic switching control equipment switches to manual input position, be that manual control loop is when closed, acoustooptic alarm system can in time send caution to operator, inform operator's signal that breaks down, reach condition with manual mode control stator blade, operator switch to manual input position with the described stator blade hand/automatic selector switch in the technology interlock logic unit in the blower fan stator blade control system by automatic input position, make the manual stator blade in stator blade hand/automatic switching control equipment increase button, manual stator blade minimizing pushbutton.
4. in the blower fan stator blade control system, the time lag of stator blade hand/automatic selector switch in the technology interlock logic unit when dropping into the position automatically and manually switch mutually the input position is 1 to 2 minute, can avoid causing system's concussion, make system's control stable, otherwise can cause the stator blade fluctuation big, Control Failure.
5. owing to after the imbalance of blower fan stator blade, as untimely locking stator blade, can cause the blower fan load to diminish suddenly, at this moment the flow direction of wind will take a turn for the worse, and surge can take place unit, and blade can rupture when serious.And the present invention can prevent from the blower fan stator blade imbalance that blower fan stator blade control system loop fault causes to prevent blower fan generation surge thereby reach, the purpose of protection fan blade.
The present invention can effectively prevent the blower fan stator blade imbalance that equipment failure causes in the stator blade control system loop; prevent blower fan generation surge; the protection fan blade is avoided irritating accidents such as slag, punching press because of the stator blade imbalance causes blast furnace, makes that blower fan stator blade control system is safer, reliable.Improvement expenses of the present invention is low, and is simple, and the economic benefit height is practical, can guarantee the blower fan safe operation and be applied to large fan of the same type.
Description of drawings
Fig. 1 is the blower fan stator blade control system skeleton diagram of the embodiment of the invention.
Fig. 2 is the stator blade hand/automatic switching control equipment schematic representation of the embodiment of the invention.
Fig. 3 is the stator blade technology interlock logic schematic representation of the embodiment of the invention.
Fig. 4 is that the manual stator blade of the embodiment of the invention increases the control logic schematic representation.
Fig. 5 is that the manual stator blade of the embodiment of the invention reduces the control logic schematic representation.
Wherein, A-stator blade hand/automatic selector switch; the logical signal that B-servocontroller input signal is lost; the logical signal that C-is lost by the stator blade position feed back signal that position transmitter sends; the logical signal that D-blower fan reverse current protection signal comes; E-servocontroller output signal and the big logical signal of stator blade position feed back signal deviation, the manual stator blade of F-increases button, and the manual stator blade of G-reduces button.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, stator blade hand/automatic switching control equipment that foundation the present invention is proposed and the embodiment that participates in the method for blower fan stator blade technology interlocking thereof are elaborated.
Stator blade hand/automatic switching control equipment schematic representation as shown in Figure 2, blower fan stator blade hand/automatic switching control equipment provided by the invention comprises: hand/automatic conversion electromagnetic valve, manual stator blade increase solenoid valve, manually stator blade increases button F, manual stator blade minimizing solenoid valve, manually stator blade reduces button G.
The input end of the conversion electromagnetic valve of hand/automatically is connected with stator blade servovalve, technology interlock logic unit in the blower fan stator blade control system respectively; Manual stator blade increase button connects manual stator blade increases solenoid valve, and manually the manual stator blade that the stator blade hand/automatic conversion electromagnetic valve is connected in the technology interlock logic unit of stator blade increase solenoid valve access blower fan stator blade control system increases control loop; Manually stator blade minimizing button connects described manual stator blade minimizing solenoid valve, and manually stator blade minimizing solenoid valve inserts the manual stator blade minimizing control loop that the stator blade hand/automatic conversion electromagnetic valve in the technology interlock logic unit is connected.
Stator blade hand in the technology interlock logic unit/conversion electromagnetic valve connects stator blade technology interlocked control loop respectively automatically, manually stator blade increases control loop, manually stator blade reduces control loop.When hand/automatic selector switch is beaten in manual position, stator blade hand/automatic conversion electromagnetic valve dead electricity, at this moment, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position.The manual input position output terminal of blower fan stator blade hand/automatic switching control equipment connects manual stator blade respectively increases solenoid valve, manual stator blade minimizing solenoid valve, manual stator blade increases solenoid valve, manually stator blade reduces solenoid valve, can manually change blower fan stator blade position by controlling; When stator blade hand/automatic selector switch placed automatic, manually stator blade control loop, manual stator blade down control loop, sound leaf increased solenoid valve, manually stator blade minimizing solenoid valve is inoperative.
For making control room and scene can both manually control the stator blade position, can also increase the pair of control button.Be a pair of stator blade increase/the down control button is arranged on the control room, a pair of stator blade increases/the down control button is arranged on the scene.Concrete scheme is: increase on the basis of said structure: manually stator blade increases control knob and manual on the spot stator blade minimizing control knob on the spot.Manual on the spot stator blade increase control knob is connected with manual stator blade increase solenoid valve; Manually stator blade minimizing control knob is connected with manual stator blade minimizing solenoid valve on the spot; Manually stator blade increase control knob and manual on the spot stator blade minimizing control knob are arranged at the working site on the spot, and manually stator blade increases button, manual stator blade minimizing button is arranged in the control room.Manually stator blade increases, subtracts the manual stator blade stator blade action effect that increases control knob and produce when manually stator blade reduces control knob control stator blade on the spot on the spot on the solenoid valve, with manually stator blade increases button in the control room, manually stator blade reduces that the automatically controlled manual stator blade of button teletransmission increases, the stator blade action effect is identical when subtracting solenoid valve.
The blower fan stator blade control system skeleton diagram of the embodiment of the invention as shown in Figure 1, stator blade servocontroller input signal is from output of stator blade manual operating device or DCS system stator blade control signal, stator blade servocontroller output control signal is delivered to the stator blade servovalve, the stator blade servovalve is converted to corresponding hydraulic pressure signal with control signal, drives the action of blower fan stator blade by stator blade hand/automatic switching control equipment.Servocontroller signal, stator blade position transmitter signal participate in the technology interlocking.
Technology interlocking signal loop can adopt simple relay circuit to finish.Stator blade technology interlock logic schematic representation as shown in Figure 3, technology interlocking signal are respectively from the deviation signal of stator blade hand/automatic selector switch, servocontroller input signal, stator blade position feed back signal, blower fan reverse current protection signal and servocontroller output signal and stator blade position feed back signal.
Manual stator blade as shown in Figure 4 increases the control logic schematic representation.When stator blade hand/automatic selector switch is beaten in manual position, increase the stator blade operation by manually increasing button in the control room.
Manual stator blade as shown in Figure 5 reduces the control logic schematic representation.When stator blade hand/automatic selector switch is beaten in manual position, reduce the stator blade operation by manually reducing button in the control room.
The working principle of stator blade hand/automatic switching control equipment provided by the invention is: hand/conversion electromagnetic valve is accepted the output signal from technology interlock logic unit automatically.When blower fan normally moved, stator blade hand/automatic switching control equipment was automatic position, and stator blade servovalve output signal is directly controlled the blower fan stator blade; When blower fan stator blade control system loop fault, with technology interlocking signal control hand/conversion electromagnetic valve makes stator blade hand/automatic switching control equipment switch to manual position by automatic position automatically, at this moment, stator blade servovalve output signal is inoperative.When conversion electromagnetic valve is in manual when position, manual stator blade increases, subtracts button or the scene manually increases, subtracts the manual stator blade of fingertip control on the spot and increases, subtracts solenoid operated blower fan stator blade in available the control room in.
As shown in Figure 1, blower fan stator blade control system comprises: DCS system, stator blade regulator, stator blade manual operating device, stator blade servocontroller, stator blade servovalve, stator blade position transmitter, technology interlock logic unit.Wherein, the DCS system comprises alarm unit, and technology interlock logic unit comprises: stator blade hand/automatic selector switch, stator blade hand/automatic conversion electromagnetic valve.Interconnected relationship between them as shown in fig. 1.
The inventor also provides a kind of method of controlling the blower fan stator blade control system technology interlocking of above-mentioned blower fan stator blade hand/automatic switching control equipment.When making that stator blade hand/automatic switching control equipment is converted to manual input position by automatic input position, can send alarm to operator, as shown in Figure 3, can adopt the mode that increases audible-visual annunciator: the output terminal that audible-visual annunciator is inserted technology interlock logic unit; Also can utilize the alarm unit of DCS system to realize reporting to the police: the output terminal of technology interlock logic unit to be connected to the DCS system, to send warning by the DCS system.When blower fan stator blade control system in the auto state running, judge whether to reach condition with manual mode control stator blade:
Condition one, operator beat the stator blade hand/automatic selector switch in the described technology interlock logic unit and manually drop into the position;
Condition two, described technology interlock logic unit receive that described stator blade servocontroller sends, and send to the information that the control signal of stator blade servocontroller is lost by described stator blade manual operating device or DCS system;
Condition three, technology interlock logic unit receive that the stator blade servocontroller sends, and send to the information that the stator blade position feed back signal of stator blade servocontroller is lost by being arranged at position transmitter on the blower fan stator blade;
Condition four, technology interlock logic unit receive that DCS system reverse current protection unit or reverse current protection device send, and send to the reverse current protection signal that DCS system reverse current protection unit or reverse current protection device produce by the fans entrance differential pressure switch;
Condition five, technology interlock logic unit receives that the DCS system sends, by the DCS system servocontroller output signal and the stator blade position feed back signal that is arranged at the position transmitter output on the blower fan stator blade are compared, when both deviates surpass setting value, the servocontroller output signal of generation and the big information of stator blade position feed back signal deviation;
When satisfying condition for the moment, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send DCS system alarm;
Step 3: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position.
When one of satisfied other conditions except that condition one, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send DCS system alarm;
Step 3: when operator know that according to alarm signal condition with manual mode control stator blade satisfies, the described stator blade hand/automatic selector switch in the technology interlock logic unit in the blower fan stator blade control system is switched to manual inputs by automatic input position;
Step 4: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position.
Notice in the operation:
(1) the stator blade diverter switch switches to " manually " position by " automatically " position, or switches to " automatically " when position by " manually " position, and shake in order to avoid cause system centre preferably at interval 1-2 minute, causes stator blade to fluctuate greatly Control Failure.
(2) increase, during checking machine stator blade, should rise slowly slowly and subtract with the stator blade manual operating device, system is difficult for causing concussion like this, good stability, control accuracy height.
Because after the imbalance of blower fan stator blade, as untimely locking stator blade, can cause the blower fan load to diminish suddenly, at this moment the flow direction of wind will take a turn for the worse, surge can take place in unit, and blade can rupture when serious.And the present invention can prevent the blower fan stator blade imbalance that blower fan stator blade control system loop fault causes; prevent blower fan generation surge thereby reach; the purpose of protection fan blade is avoided irritating accidents such as slag, punching press because of the stator blade imbalance causes blast furnace, makes that blower fan stator blade control system is safer, reliable.
It should be noted last that, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technological scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. a blower fan stator blade hand/automatic switching control equipment is characterized in that, comprises that hand/automatic conversion electromagnetic valve, manual stator blade increase solenoid valve, manually stator blade increases button, manual stator blade minimizing solenoid valve, manually stator blade reduces button;
The input end of the conversion electromagnetic valve of described hand/automatically is connected with stator blade servovalve, technology interlock logic unit in the blower fan stator blade control system respectively;
Described manual stator blade increase button connects described manual stator blade increases solenoid valve, and manually the manual stator blade that the stator blade hand/automatic conversion electromagnetic valve is connected in the technology interlock logic unit of stator blade increase solenoid valve access blower fan stator blade control system increases control loop;
Described manual stator blade minimizing button connects described manual stator blade and reduces solenoid valve, and manually the manual stator blade that the stator blade hand/automatic conversion electromagnetic valve is connected in the technology interlock logic unit of stator blade minimizing solenoid valve access blower fan stator blade control system reduces control loop.
2. blower fan stator blade hand/automatic switching control equipment as claimed in claim 1 is characterized in that, comprises also that on the spot manually stator blade increases control knob and manual on the spot stator blade minimizing control knob;
Described manual on the spot stator blade increases control knob and is connected with described manual stator blade increase solenoid valve;
Described manual on the spot stator blade reduces control knob and is connected with described manual stator blade minimizing solenoid valve;
Manually stator blade increase control knob and manual on the spot stator blade minimizing control knob are arranged at the working site on the spot, and described manual stator blade increases button, manually stator blade minimizing button is arranged in the control room.
3. the method for a blower fan stator blade control system technology interlocking that relates to claim 1 or 2 described blower fan stator blade hand/automatic switching control equipments, described blower fan stator blade control system comprises: DCS system, stator blade manual operating device, stator blade servocontroller, stator blade servovalve, stator blade position transmitter, technology interlock logic unit; Described DCS system is provided with alarm unit; Described technology interlock logic unit comprises: stator blade hand/automatic selector switch, stator blade hand/automatic conversion electromagnetic valve; It is characterized in that,
Connect audible-visual annunciator at the output terminal of described technology interlock logic unit, or, the output terminal of technology interlock logic unit is connected the alarm unit of described DCS system;
When blower fan stator blade control system in the auto state running, judge whether to reach condition with manual mode control stator blade:
Condition one, operator beat the stator blade hand/automatic selector switch in the described technology interlock logic unit and manually drop into the position;
Condition two, described technology interlock logic unit receive that described stator blade servocontroller sends, and send to the information that the control signal of stator blade servocontroller is lost by described stator blade manual operating device or DCS system;
Condition three, technology interlock logic unit receive that the stator blade servocontroller sends, and send to the information that the stator blade position feed back signal of stator blade servocontroller is lost by being arranged at position transmitter on the blower fan stator blade;
Condition four, technology interlock logic unit receive that DCS system reverse current protection unit or reverse current protection device send, and send to the reverse current protection signal that DCS system reverse current protection unit or reverse current protection device produce by the fans entrance differential pressure switch;
Condition five, technology interlock logic unit receives that the DCS system sends, by the DCS system servocontroller output signal and the stator blade position feed back signal that is arranged at the position transmitter output on the blower fan stator blade are compared, when both deviates surpass setting value, the servocontroller output signal of generation and the big information of stator blade position feed back signal deviation;
When satisfying condition for the moment, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send described DCS system alarm unit to report to the police;
Step 3: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position;
When one of satisfied other conditions except that condition one, execution comprises the steps:
Step 1: the stator blade hand in the technology interlock logic unit/automatic conversion electromagnetic valve dead electricity, the stator blade hand/conversion electromagnetic valve switches to " manually " position by " automatically " position automatically, make blower fan stator blade locking position, and make the hand/automatic conversion electromagnetic valve in described blower fan stator blade hand/automatic switching control equipment switch to " manually " position by " automatically " position;
Step 2: described blower fan stator blade control system becomes the manual method of operation by the automatic method of operation, and while technology interlock logic unit outputs a control signal to audible-visual annunciator and sends " stator blade control system malfunction alarm " information or send described DCS system alarm unit to report to the police;
Step 3: when operator know that according to alarm signal condition with manual mode control stator blade satisfies, the described stator blade hand/automatic selector switch in the technology interlock logic unit in the blower fan stator blade control system is switched to manual inputs by automatic input position;
Step 4: the manual stator blade increase solenoid valve or the manual stator blade that increase button, the automatically controlled hand/automatic switching control equipment of manual stator blade minimizing button by the described manual stator blade that is provided with in the control room reduce electromagnetic valve stator blade position; Or,
Manual on the spot stator blade by the scene setting increases control knob, manually stator blade reduces control knob on the spot, and manual stator blade increase solenoid valve or the manual stator blade of directly controlling hand/automatic switching control equipment reduce solenoid valve, control the stator blade position.
4. the method for the blower fan stator blade control system technology interlocking of control stator blade hand/automatic switching control equipment as claimed in claim 3, it is characterized in that, in the described condition one, stator blade hand/automatic selector switch in the blower fan stator blade control system in the technology interlock logic unit automatically drops into the position and is manually dropping into the position when switching mutually, and its time lag is 1 to 2 minute.
5. the method for the blower fan stator blade control system technology interlocking of control stator blade hand/automatic switching control equipment as claimed in claim 3 is characterized in that the setting value described in the described condition five is 8% to 12%.
6. the method for the blower fan stator blade control system technology interlocking of control stator blade hand/automatic switching control equipment as claimed in claim 4 is characterized in that the setting value described in the described condition five is 8% to 12%.
7. the method for the blower fan stator blade control system technology interlocking of control stator blade hand/automatic switching control equipment as claimed in claim 3 is characterized in that the span of the setting value described in the described condition five is 8% to 10%.
8. the method for the blower fan stator blade control system technology interlocking of control stator blade hand/automatic switching control equipment as claimed in claim 4 is characterized in that the span of the setting value described in the described condition five is 8% to 10%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215648.7A CN102278322B (en) | 2011-07-29 | 2011-07-29 | Manual/automatic switching device and process interlocking method for fan stationary blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215648.7A CN102278322B (en) | 2011-07-29 | 2011-07-29 | Manual/automatic switching device and process interlocking method for fan stationary blade |
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| Publication Number | Publication Date |
|---|---|
| CN102278322A true CN102278322A (en) | 2011-12-14 |
| CN102278322B CN102278322B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110215648.7A Expired - Fee Related CN102278322B (en) | 2011-07-29 | 2011-07-29 | Manual/automatic switching device and process interlocking method for fan stationary blade |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486325A (en) * | 2013-09-29 | 2014-01-01 | 中科隆声（北京）科技有限责任公司 | Device capable of achieving automatic switching between electric control and manual control of electric valve |
| CN110067766A (en) * | 2019-04-25 | 2019-07-30 | 石钢京诚装备技术有限公司 | Furnace axial flow blower anti-asthma adjusts safely guard method |
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| CN2191306Y (en) * | 1993-11-06 | 1995-03-08 | 湖南省冷水江通亚科技开发研究所 | Full-flow-line type adjustable stationary guide blade energy-saving fan |
| US20090123284A1 (en) * | 2007-11-09 | 2009-05-14 | Madsen Joe E | High volume low speed fan |
| FR2947197A1 (en) * | 2009-06-26 | 2010-12-31 | Snecma | METHOD FOR MANUFACTURING A FORGED PART WITH ADAPTIVE POLISHING |
| CN201696311U (en) * | 2010-05-27 | 2011-01-05 | 河南众力空分设备有限公司 | Centrifugal compressor with variable inlet guide vane and rotatable vane diffuser |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2191306Y (en) * | 1993-11-06 | 1995-03-08 | 湖南省冷水江通亚科技开发研究所 | Full-flow-line type adjustable stationary guide blade energy-saving fan |
| US20090123284A1 (en) * | 2007-11-09 | 2009-05-14 | Madsen Joe E | High volume low speed fan |
| FR2947197A1 (en) * | 2009-06-26 | 2010-12-31 | Snecma | METHOD FOR MANUFACTURING A FORGED PART WITH ADAPTIVE POLISHING |
| CN201696311U (en) * | 2010-05-27 | 2011-01-05 | 河南众力空分设备有限公司 | Centrifugal compressor with variable inlet guide vane and rotatable vane diffuser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486325A (en) * | 2013-09-29 | 2014-01-01 | 中科隆声（北京）科技有限责任公司 | Device capable of achieving automatic switching between electric control and manual control of electric valve |
| CN110067766A (en) * | 2019-04-25 | 2019-07-30 | 石钢京诚装备技术有限公司 | Furnace axial flow blower anti-asthma adjusts safely guard method |
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| Publication number | Publication date |
|---|---|
| CN102278322B (en) | 2014-04-02 |
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