WO2014079229A1

WO2014079229A1 - Sealing structure for pipe connectors and pipe connector

Info

Publication number: WO2014079229A1
Application number: PCT/CN2013/080474
Authority: WO
Inventors: 朱利波; 林建江
Original assignee: 宁波三灵电子有限公司
Priority date: 2012-11-26
Filing date: 2013-07-31
Publication date: 2014-05-30
Also published as: CN103178474A; CN103178474B

Abstract

A sealing structure for pipe connectors and a pipe connector using the sealing structure. The sealing structure comprises a sealing ring (4), a support ring (5), and an elastic ring (6) sleeved over the outside of a pipe (3). The outer end of the elastic ring and the outer end of the sealing ring are in tight contact respectively with the clamping end of a nut (2) and the threaded end of a connection body (1). The two ends of the support ring are of an arc shape. The inner end of the sealing ring is of a slope surface. The two ends of the support ring respectively press on the inner end of the elastic ring and the inner end of the sealing ring. In the sealing structure for pipe connectors, the contact surface between the sealing ring and the support ring is of the contact between a slope surface and an arc surface, thereby preventing the sealing ring from radial dislocations or movements and ensuring the sealing effects. The path for external water to enter a pipe is changed, and the difficulty for external water to enter a pipe is heightened. The sealing effects are therefore enhanced.

Description

Pipe joint sealing structure and pipe joints The present application claims to be Chinese patent issued on November 26, 2012, the application number is 201210484884.3, and the invention name is "a pipe joint sealing structure and pipe joints" Chinese patent Priority of the application, the entire contents of which are incorporated herein by reference. Technical field

The invention relates to the technical field of pipe joints, in particular to a pipe joint sealing structure, and to a pipe joint having the above-mentioned pipe joint sealing structure.

Background technique

EMT (electric-metallic tubing) is a common type of wire tube whose ends are usually connected by pipe joints.

A pipe joint in the prior art will be described below with reference to the accompanying drawings. Referring to Figure 1, Figure 1 is a schematic view of a typical pipe joint.

The pipe joint generally comprises a coupling body 1, a nut 2, a sealing jaw 4, a supporting jaw 5, and a magazine 6'; a sealing jaw 4, a supporting jaw 5, a magazine 6, and a sleeve for EMT (this The outer part of the application is referred to as the pipe member 3, and the outer side of the pipe member 3 is fitted into the inner hole of the coupling body 1. The coupling body 1 has at least one end of a threaded connection end, and the end has an external thread for use with the nut 2, Cooperating, the nut 2 has an internal thread; one end of the nut 2 is connected with the threaded end of the coupling body ,, and the other end forms a clamping end for clamping the magazine 6, and the screw When the cap 2, the nut 2 is pressed against the magazine 6, and the tube 3% is pressed, the tube 3 is fixedly connected to the coupling body 1.

Wherein, the sealing jaw 4 is used to prevent external water from entering the tubular member 3 at the joint of the nut 2, the pipe member 3, and the coupling body 1, and the threaded connection of one end of the sealing jaw 4 against the coupling body 1, The end port, the end surface of the other end abuts against the end surface of the support cymbal 5, and the other end of the support cymbal 5 is pressed against the magazine 6. Wherein, the sealing 圏 4, one end of the supporting 圏 5, is a plane, and the corresponding end of the supporting 圏 5 is also a flat surface, that is, the abutting faces of the two are flat.

The sealing structure of the sealing jaw 4 and the supporting jaw 5 has the following problem: when the sealing jaw 4 is mounted and the crucible 5 is supported, since the sealing crucible 4 is in planar contact with the supporting crucible 5, the sealing crucible 4 , along the pipe member 3, the radial direction is prone to misalignment or sway, and because of the sealing 圏 4, usually a flexible member, easy to get stuck In the gap between the magazine 6 and the coupling body 1, the sealing member cannot be closely attached to the threaded connection port of the supporting jaw 5, and the coupling body 1, so that the sealing fails and the waterproof effect cannot be achieved; Moreover, during the use of the pipe joint, due to the planar contact between the sealing jaw 4 and the supporting jaw 5, there is still a certain gap between the two, and the sealing effect is poor.

Therefore, how to prevent the sealing 圏 from being misaligned and improve the sealing effect of the pipe joint has become a technical problem to be solved by those skilled in the art. Summary of the invention

A first object of the present invention is to provide a pipe joint sealing structure which can prevent the sealing jaw from being displaced and improve the sealing effect of the pipe joint. A second object of the present invention is to provide a pipe joint having the above-described pipe joint sealing structure.

In order to achieve the above first object, the present invention provides a pipe joint sealing structure for sealing a pipe joint, a joint between the joint body and the nut, and a sealing raft, a support raft, which is sleeved on the outside of the pipe member, a magazine, an outer end of the magazine, an outer end of the sealing jaw abutting against a threaded port of the coupling body or a clamping end of the nut; the two ends of the supporting jaw are arcs The inner end of the sealing jaw is a sloped surface, and the two ends of the supporting jaw are respectively pressed against the inner end of the magazine and the inner end of the sealing jaw.

Preferably, the supporting raft is a supporting round raft.

Preferably, the outer end of the magazine and the end surface of the outer end of the sealing jaw are respectively engaged with the threaded port of the coupling body or the end surface of the clamping end of the nut.

The pipe joint sealing structure provided by the present invention comprises a sealing jaw, a supporting jaw and a magazine which are sleeved on the outer side of the pipe member, and the outer end of the magazine and the outer end of the sealing jaw respectively abut the thread of the coupling body a clamping end of the port or the nut; both ends of the supporting jaw are arc-shaped end faces, and an inner end of the sealing jaw is a sloped surface, and both ends of the supporting jaw are respectively pressed against the magazine The inner end, the inner end of the sealing jaw.

The pipe joint sealing structure of the structure, the contact surface between the sealing jaw and the supporting raft is the contact between the slope surface and the circular arc surface, and when the sealing raft and the supporting raft are installed, the circular arc surface of the supporting raft can press the sealing 圏The slope surface can limit the sealing jaw in the radial direction of the pipe fitting, which can prevent the sealing jaw from being misaligned or tilted in the radial direction of the pipe member, thereby preventing the sealing jaw from being caught in the gap between the magazine and the coupling body. Therefore, the sealing member can be closely adhered to the end surface of the threaded end of the supporting jaw and the connecting body to ensure a better sealing effect; moreover, during the sealing process, the arc surface of the supporting jaw is pressed against the slope surface of the sealing jaw, Since the sealing jaw is a flexible member, the sealing jaw is elastically deformed under the action of the pressing force, and at the same time, since the end portion of the slope surface of the sealing jaw is thin, the end portion of the slope of the sealing jaw can be closely attached to the circular arc surface of the supporting jaw. , forming a good seal between the sealing jaw and the supporting weir, increasing the difficulty of external moisture entering and improving the sealing effect.

The main sealing effect of the invention is that the sealing jaw is sealed with the outer wall of the pipe member, and the sealing 圏 can form a seal with the coupling body and the supporting raft, so that the external water cannot pass through the outer wall of the pipe member, the thread of the coupling body, and the circular arc surface of the supporting raft. Inside the pipe fittings; and both ends of the sealing jaw are beveled surfaces, two seals can be formed at each end, one is the seal between the sealing jaw and the threaded end of the coupling body and the seal between the sealing jaw and the outer wall of the tubular member, The seal between the sealing jaw and the supporting jaw and the sealing between the sealing jaw supporting the mating end and the outer wall of the tubular member can form two protective seals, and the sealing effect is better.

In order to achieve the above second object, the present invention also provides a pipe joint comprising a coupling body, both ends of the coupling body having a threaded connection end, and at least one threaded connection end of the coupling body is connected There are nuts, pipe fittings and the above-mentioned pipe joint sealing structure. Since the above-mentioned pipe joint sealing structure has the above technical effects, the pipe joint having the above-mentioned pipe joint sealing structure should also have corresponding technical effects.

Preferably, the threaded connection ends of the two ends of the coupling body are connected with a sealing structure of a nut, a pipe member and the pipe joint described above.

Preferably, the threaded end of one end of the coupling body is connected with a sealing structure of a nut, a pipe member and the above-mentioned pipe joint, and the screw connection end of the other end is connected with a lock nut and a stop weir.

DRAWINGS

Figure 1 is a schematic view showing the structure of a typical pipe joint;

2 is a schematic structural view of a pipe joint sealing structure according to a first embodiment of the present invention; FIG. 3 is a schematic exploded view of the pipe joint sealing structure of FIG.

Figure 4 is a partially enlarged schematic view showing the sealing member, the magazine and the supporting jaw of Figure 2; Figure 5 is a partially enlarged structural view of the sealing member of Figure 4 in cooperation with the supporting jaw; 6 is a schematic structural view of a pipe joint sealing structure according to a second embodiment of the present invention; FIG. 7 is a partially enlarged structural view of the seal member, the magazine and the supporting jaw of FIG. 6; FIG. 8 is a seal of FIG. FIG. 9 is a schematic structural view of a pipe joint provided by a specific embodiment of the present invention; FIG. 10 is a schematic view showing an exploded structure of the pipe joint of FIG. 9;

11 is a schematic structural view of a pipe joint according to another embodiment of the present invention; wherein, in FIG. 1 to FIG.

Coupling body 1, nut 2, tube member 3, sealing jaw 4, support jaw 5, magazine 6, coupling body 1, nut 2, tube member 3, sealing jaw 4, supporting jaw 5, magazine 6, locking nut 7, stop 圏 8;

a first nut 12, a first tube member 13, a first sealing jaw 14, a first supporting jaw 15, a first magazine 16;

The second nut 22, the second tube member 23, the second sealing jaw 24, the second supporting jaw 25, and the second magazine 26.

detailed description

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

2, FIG. 3, FIG. 2 is a schematic structural view of a pipe joint sealing structure according to a first embodiment of the present invention; and FIG. 3 is a schematic exploded view of the pipe joint sealing structure of FIG.

As shown in FIG. 2 and FIG. 3, the pipe joint sealing structure provided by the present invention is used for sealing the pipe member 3, the joint between the joint body 1 and the nut 2, and the pipe joint sealing structure comprises sleeved on the outer side of the pipe member 3. In a specific embodiment, the coupling body 1 is a tubular structure having an inner hole, at least one end of which is provided with an external thread, and the end of the end forms a threaded port, the outer portion The thread is for engaging with the internal thread of the nut 2, and one end of the nut 2 has an internal thread for engaging with the external thread of the coupling body 1, the outer end of the magazine 6, the sealing jaw The outer end of the support body 5 abuts against the threaded port of the coupling body 1 and the clamping end of the nut 2; the two ends of the support jaw 5 are curved end faces, and the inner end of the sealing jaw 4 a sloped surface, the two ends of the supporting jaw 5 are respectively pressed against the inner end of the magazine 6 and the sealing jaw 4 The inside end.

The pipe joint sealing structure of this structure, as shown in FIG. 4 and FIG. 5, the contact surface between the sealing jaw 4 and the supporting jaw 5 is the contact between the slope surface and the arc surface, and the sealing jaw 4 and the supporting jaw 5 are installed. When the arc surface of the support cymbal 5 can press the slope surface of the sealing cymbal 4, the sealing cymbal 4 can be restrained in the radial direction of the pipe member 3, thereby preventing the sealing cymbal 4 from being displaced or swayed in the radial direction of the pipe member 3, thereby It is possible to prevent the sealing jaw 4 from being caught in the gap between the magazine 6 and the coupling body 1, so that the sealing member 4 can be closely fitted with the supporting jaw 5, the outer wall of the tube member 3, and the threaded end port of the coupling body 1, ensuring better sealing. The sealing effect; Moreover, during the sealing process, the circular arc surface of the supporting jaw 5 presses against the slope surface of the sealing jaw 4, and since the sealing jaw 4 is a flexible member, the sealing jaw 4 is elastically deformed by the pressing force. At the same time, since the end portion of the slope surface of the sealing jaw 4 is thin, the end portion of the slope surface of the sealing jaw 4 can be closely attached to the arc surface of the supporting jaw 5, and the sealing jaw 4 is pressed by the supporting jaw 5, and then the tube member is compressed inwardly. 3 outer wall, so that external water can not pass The outer wall of the tube 3 flows into the tube 3, so that the sealing rings of good seal is formed between the rings of the support 4 and 5, increasing the difficulty of external moisture into the improve the sealing effect.

The other end of the support weir 5 is also a circular arc surface which can press the inner end of the magazine 6 . When the nut 2 is tightened, this structure allows the support jaw 5 to tightly press the magazine 6, so that the magazine 6 can be quickly tightened, thereby being able to clamp the tube 3.

The main sealing effect of the present invention is that the sealing jaw 4 is sealed with the outer wall of the pipe member 3, and a seal can be formed between the sealing jaw 4 and the coupling body 1 and the supporting jaw 5, so that external water cannot pass through the outer wall of the pipe member 3 and the thread of the coupling body 1. , the inner surface of the tube 3 of the support 圏 5, and the sides of the sealing 圏 4 are inclined, two seals can be formed, one is the seal and seal between the sealing 圏 4 and the threaded end of the coupling body 1 The seal between the outer wall of the pipe member 3, the seal between the seal 圏4 and the support 圏5 and the seal between the seal 圏4 of the support end of the 圏5 and the outer wall of the pipe member 3, so that two protections can be formed Sealed for better sealing results.

In a preferred solution, the supporting cymbal 5 is a supporting circular cymbal, that is, the supporting cymbal 5 has a circular cross section, and the supporting cymbal 5 of this structure can adopt a rigid circular cymbal, such as various metal round cymbals, and the support of the structure The processing process is simple, and the process of the single cylinder produces a better sealing effect. It is foreseeable that those skilled in the art can think of the sealing concept of the present application without any creative work. In a further embodiment, the outer end of the magazine 6 and the end surface of the outer end of the sealing jaw 4 respectively engage with the threaded port of the coupling body 1 or the end surface of the clamping end of the nut 2, as shown in FIG. 2 As shown, in order to be able to compress the magazine 6, the supporting jaw 5, the sealing jaw 4, the threaded port of the coupling body 1 may be a beveled surface, and the end faces of the respective ends of the sealing jaws 4 are also matching bevels; The inner side of the pressing end of the cap 2 is also a beveled surface, and correspondingly, the respective ends of the magazine 6 are also mating bevels.

In the above embodiment, the pipe fitting sealing structure is installed in the following order: the sealing jaw 4 presses the threaded port of the coupling body 1, the supporting jaw 5 presses the sealing jaw 4, the magazine 6 presses the supporting jaw 5, and the magazine 6 abuts The clamped end of the nut 2. The invention is not limited thereto. As shown in FIG. 6, FIG. 7, and FIG. 8, the sealing sequence of the pipe joint sealing structure may also be: the sealing jaw 4 presses the clamping end of the nut 2, and the supporting jaw 5 is pressed. The sealing jaw 4, the magazine 6 presses the support jaw 5, and the magazine 6 abuts against the threaded port of the coupling body 1. Both of the above solutions should be within the scope of the present invention.

The present invention also provides a pipe joint, as shown in FIG. 2 and FIG. 3, the pipe joint includes a coupling body 1 having a threaded connection end at both ends thereof, and a thread of the coupling body 1 The connecting end is connected with a nut 2, a tube member 3, and the above-mentioned sealing jaw 4, a supporting jaw 5, and a magazine 6. The other threaded end of the coupling body 1 is shown with a locking nut 7 and a stopper 圏8. The pipe joint sealing structure formed by the sealing jaw 4, the supporting jaw 5, and the magazine 6 is the pipe joint sealing structure in the above embodiment. Since the above-mentioned pipe joint sealing structure has the above technical effects, the above-mentioned pipe joint sealing structure is provided. The pipe joints should also have the corresponding technical effects.

The pipe joint provided by the present invention is not limited thereto. As shown in FIG. 9, FIG. 10 and FIG. 11, the pipe joint includes a coupling body, and both ends of the coupling body have a screw connection end, and the coupling body has A threaded connection end is connected with a first nut 12, a first tube member 13, a first sealing jaw 14, a first supporting jaw 15, a first magazine 16, and another threaded end of the coupling body is mounted with a second screw The cap 22, the second tube member 23, the second sealing jaw 24, the second supporting jaw 25, and the second magazine 26. Wherein, the first sealing jaw 14, the first supporting jaw 15, the first cartridge 16 forms a pipe joint sealing structure, the second sealing jaw 24, the second supporting jaw 25, and the second magazine 26 form a pipe joint seal The structure is the pipe joint sealing structure in the above embodiment. Since the above-mentioned pipe joint sealing structure has the above technical effects, the pipe joint having the above-mentioned pipe joint sealing structure should also have corresponding technical effects.

The above description is only a description of a preferred embodiment of the invention, it should be noted that due to textual expression The finite nature, and the infinitely specific structure exists, and those skilled in the art can make some improvements and retouching without departing from the principle of the invention. These improvements and retouching should also be It is considered as the scope of protection of the present invention.

Claims

Rights request

1. A pipe joint sealing structure, used to seal the connection between the pipe fitting, the connecting body and the nut, characterized in that it includes a sealing ring, a support ring, and an elastic ring that are sleeved on the outside of the pipe fitting, and the elastic ring The outer end of the ring and the outer end of the sealing ring are respectively against the threaded port of the coupling body or the clamping end of the nut; both ends of the support ring are arc-shaped end surfaces, and the sealing ring is The inner end is a slope surface, and the two ends of the support ring respectively press the inner end of the elastic ring and the inner end of the sealing ring.

2. The pipe joint sealing structure according to claim 1, characterized in that the support ring is a support circle.

3. The pipe joint sealing structure according to claim 1, characterized in that the outer end of the elastic ring and the end surface of the outer end of the sealing ring are respectively connected with the threaded port of the connecting body or the nut. The end face of the clamping end is fit.

4. A pipe connection, including a connection body, both ends of the connection body having threaded connection ends, characterized in that at least one threaded connection end of the connection body is connected to a nut, a pipe fitting and claims 1-3 The pipe joint sealing structure described in any one of the above.

5. The pipe joint according to claim 4, characterized in that, the threaded connection ends at both ends of the connection body are connected with nuts, pipe fittings and the pipe joint seal according to any one of claims 1 to 3. structure.

6. The pipe joint according to claim 4, characterized in that the threaded connection end of one end of the connection body is connected with a nut, a pipe fitting and the pipe joint sealing structure according to any one of claims 1-3. , the threaded connection end at the other end is connected with a locking nut and a stop ring.