EP1743714A1 - Device for spraying liquids on objects such as machine parts or the like - Google Patents

Abstract

Equipment has a valve (9), which is arranged in the line (8,12,13) which is leading from the pump (4) to the nozzle pipe or perforated pipe (6,7). The valve is closed by opening the cover (2) or the front door of the washing equipment and is opened by closing cover or front door and then flow is released.

Description

The invention relates to a device for spraying liquids onto objects, for example a washing device for cleaning articles such as machine parts or the like, with a housing which is provided with an upper hinged lid or with a frontal door, a basket for receiving the objects to be cleaned which can rest on a turntable which rotates in the injection process with the basket, and further with a pump which conveys liquid and at least one nozzle tube or perforated tube, which directs exiting liquid jets on the wash basket. The liquid, e.g. Water, which may be provided with a detergent additive, or combustible media such as solvent-based cleaner is preferably sucked from a located in the lower part of the housing liquid collection tank by the pump and at least one nozzle or perforated tube above the receiving basket and at least one nozzle or perforated tube below supplied to the receiving basket, said tubes can also rotate up, down and laterally around the basket, so that impinge on the objects from above and from below and optionally laterally jets of liquid. The device can z. B. also for spraying of preserving liquids or colors on objects.

The invention will be described below as a washing device. If the cleaned items are to be removed from the machine or if additional items are to be placed in the basket for cleaning, the pump must be turned off before the case is opened, otherwise liquid may spurt out of the opened case. Both Previously known devices of the type under consideration must be maintained for a while after opening the housing, after the electric pump is switched off, since the liquid in the pipe system is still under pressure, so that even after switching off the pump still liquid from the nozzle pipes or Pipe pipes exit.

The present invention has for its object to improve a device of the type considered so that its housing can be opened during a liquid injection process or immediately after its completion without the disadvantage described above.

This object is achieved by the features of claim 1.

Advantageous embodiments of the invention are characterized in the subclaims.

The invention provides that in the line leading from the pump to the at least one nozzle tube or perforated pipe, a valve is arranged, which is open with the lid closed and releases the flow and which is closed by the opening of the lid. If the device, as is preferred, has a plurality of nozzle tubes or perforated tubes, this valve is located in the common supply line to the nozzle or perforated tubes.

In further detail, it is provided that the valve comprises a staging plunger which is connected to at least one check cap and / or check ball and is mechanically, hydraulically or pneumatically actuated to open and close the valve.

The valve is preferably biased by spring force into the closed position, wherein the flowing medium and the preferred provided coil spring abruptly when opening the lid or a front door of the housing Block flow through the pipe leading to the nozzle pipes or perforated pipes.

This ensures that the device can be opened immediately after switching off the pump, without even more liquid escapes from the nozzle pipes or perforated pipes. The pump is preferably also switched off automatically by opening the lid or a front door of the device.

In one embodiment of the invention it is provided that on the inside of the lid (or possibly the front door of the housing) an actuator is attached, which impinges upon closing of the lid on the actuating plunger of the valve and pushes it into the open position, i. in the case of an upper lid depressed.

The actuator may be a rod which is hinged to the cover and held in a preferred vertical arrangement by a guide means in alignment with the actuating tappet. The guide device can engage around the rod in an annular manner and, in the case of an upper cover, be fastened to a side wall of the housing. If the device has a hinged front door, the actuator is preferably arranged horizontally.

In another embodiment, a locking handle for the lid or the door during its rotational movement into the closed position presses the actuating plunger in the open position of the valve.

In further detail it is proposed that the actuating plunger of the valve merges into a smaller diameter guide plunger and that a non-return valve rests against the annular shoulder formed thereby, which has a circular ring shape and surrounds the guide plunger and is secured thereto. In addition, it can be provided that a check ball is attached to the free end of the guide plunger. There are also several non-return valves and / or a plurality of check balls are provided which cooperate with respective valve seats.

In the device according to the invention is thus reliably prevented that after opening the lid still liquid exits the nozzle pipes or perforated pipes. As a result, the safety of the device is significantly increased because the fluid is sometimes hot and could burn an operator, or be flammable and aggressive.

The invention is not limited to the fact that the valve is mechanically opened and closed, this can also be done by a hydraulic, pneumatic or electrical actuation of the valve stem.

Figur 1

eine rein schematische Darstellung eines Geräts mit geschlossenem Deckel;

Figur 2

das Gerät gemäß Figur 1 mit geöffnetem Deckel;

Figur 3

eine vergrößerte Darstellung des Ventils bei geschlossenem Deckel;

Figur 4

das Ventil gemäß Figur 3 bei geöffnetem Deckel;

Figur 5

ein Gerät mit einem drehbaren Verriegelungsgriff für den Deckel.

Further details of the invention will become apparent from the following description of a preferred embodiment and from the drawings. Showing:

FIG. 1

a purely schematic representation of a device with a closed lid;

FIG. 2

the device of Figure 1 with the lid open;

FIG. 3

an enlarged view of the valve with the lid closed;

FIG. 4

the valve of Figure 3 with the lid open;

FIG. 5

a device with a rotatable locking handle for the lid.

Figures 1 and 2 show in a purely schematic manner essential parts of a device e.g. for cleaning machine parts or the like.

The housing 1 contains in the illustrated embodiment, an upper lid 2, which is hinged around hinges 3. In the bottom region of the housing 1, a pump 4 is housed, the liquid sucks from a housing portion 5, in which the liquid is collected again after it has leaked from the nozzle tubes or perforated tubes 6, 7. From the pump 4 first performs a line 8 in the form of a pipe to a valve 9 upwards, from where two pipe or Branch hose branch 10, 11 laterally. These tube or hose nozzle 10, 11 1 are connected via hoses or tubes 12, 13 with the upper nozzle tube or perforated tube 6, from the liquid jets downwards, and connected to a lower nozzle tube or perforated tube 7, which from below liquid jets against a arranged between the nozzle tubes, not shown basket directed, in which the objects to be cleaned are inserted.

The lid 2 has an inverted trough or hood shape and receives the upper nozzle tube or hole tube in it, as shown in Figures 1 and 2. In the lower region of the lid 2, an actuating rod 14 for the valve 9 is articulated, preferably on a side wall. The actuating rod 14 extends through an annular guide member 15 which guides the actuating rod 14 so that its head end when closing the lid on an actuating plunger 16 of the valve 9 and this pushes against the force of a spring 17 down, whereby the valve 9 is opened ,

When the lid 2 of the device is opened, as shown in FIG. 2, the actuating rod 14 releases the actuating tappet 16, which as a result is urged abruptly upward into the closed position of the valve by the flowing medium, assisted by the force of the spring 17.

With reference to Figures 3 and 4, the valve 9 contains, in addition to the parts already described a check valve 18 which bears against an annular shoulder 19 at which the actuating rod 16 narrows cross-sectionally to a guide tappet 20. At the free end of the guide tappet 20, a check ball 21 is attached.

The coil spring 17 is supported on the underside of the check valve 18 and on a tappet guide 22 for the guide tappet 20. The actuating plunger 16 extends through a guide bush 23 of the valve housing. At 24, a seal for the guide tappet is designated. The seal for the non-return valve 18 is indicated by the reference numeral 25.

Figure 3 shows the state in which the actuating plunger 16 is pressed by the actuating rod 14 against the force of the coil spring 17 down so that the flow from the pump 4 through the lower valve opening 26 and the upper valve opening 27 to the leads 12 and 13th is released for the upper nozzle tube 6 and the lower nozzle tube 7.

When the lid 2 of the device is opened (or a front door is opened) the actuating plunger 16 is released, so that the fluid and the spring 17 press the check valve 18 and the check ball 21 abruptly against their valve seats, whereby the fluid paths closed by the valve are.

The embodiment of Figure 5 includes a rotatable locking handle 28 for the lid 2. In the closed position of the locking handle 28 presses this with an actuating portion 29, the actuating plunger 16 of the valve 9 against spring force down.

Claims (8)

Apparatus for spraying liquids onto objects, such as machine parts or the like, comprising a housing, a basket for holding the objects, and further comprising a pump which delivers liquid and supplies at least one nozzle tube or perforated tube,
characterized,
in that a valve (9) is arranged in the line (8, 12, 13) leading from the pump (4) to the at least one nozzle pipe or perforated pipe (6, 7), which is open when the cover (2) or front door of the washing device is open closed and opened with the lid or front door closed and releases the flow. Apparatus according to claim 1,
characterized,
in that the valve (9) has an actuation tappet (16) which is connected to at least one non-return valve (18) and / or at least one check ball (21) and which can be actuated mechanically, hydraulically or pneumatically to open the valve (9). Apparatus according to claim 1,
characterized,
that the valve (9) can be brought abruptly by the flowing medium in the closed position. Apparatus according to claim 3,
characterized,
that the closing movement is supported by spring force. Device according to one of claims 1 to 4,
characterized,
that on the inside of the lid (2) or the front door an actuator (14) is mounted, which impinges on the actuating tappet (16) when closing the lid (2) or the front door and pushes it down or forward. Apparatus according to claim 5,
characterized,
in that the actuating member is a rod (14) which is hinged to the cover (2) or the front door and held by a guide means (15) in alignment with the actuating tappet (16). Device according to one of claims 1 to 4,
characterized,
in that a locking handle (28) for the cover (2) strikes the actuating tappet (16) during its rotary movement for closing the cover (2) with an actuating section (29) and opens the valve. Device according to one of claims 1 to 7,
characterized,
in that the actuation tappet (16) merges into a guide tappet (20) in that a nonreturn flap (18) rests against the annular shoulder (19) which surrounds it and surrounds the guide tappet (20) in annular fashion and is fastened to the free end of the guide tappet (20) Guide tappet (20) a check ball (21) is attached.

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