Explosion-proof valve

Abstract

The utility model discloses an explosion-proof valve which comprises a pilot valve seat and a valve body connected with the pilot valve seat, a coil is arranged in the pilot valve seat, a wire holder is rotatably arranged on the pilot valve seat, the pilot valve seat is movably connected with a wire mounting seat, the lower end of the wire holder extends into the upper end of the pilot valve seat and is in clearance fit with the pilot valve seat, and the wire holder is movably connected with the wire mounting seat. The inner wall of the upper end of the pilot valve seat is provided with an annular groove in the circumferential direction, the annular groove is provided with a notch groove communicated with the annular groove, the notch groove extends upwards in the axial direction of the pilot valve seat, the outer wall of the lower end of the wire holder is provided with a protruding block, the protruding block enters the annular groove through the notch groove and is in sliding connection with the annular groove, and the side wall of the pilot valve seat is provided with a locking piece. The locking piece extends into the annular groove and abuts against the wire holder to fix the wire holder in the pilot valve seat, the wire holder can rotate to facilitate wire connection of a user, meanwhile, excessive rotation of the wire holder is avoided, wire harness winding is prevented, and the service life of the wire harness is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, and particularly relates to an explosion-proof valve. Background Art

[0002] An explosion-proof valve is an important safety device, mainly used in flammable and explosive dangerous places, which can prevent the spread of explosion from the initial position to other process units, avoid "secondary" or system explosion accidents, and thus reduce the explosion disaster. The explosion-proof valve is a relatively popular explosion-proof device in the world because of its simplicity and reliability.

[0003] The explosion-proof valve mainly consists of two parts: a valve body and a coil. The coil is fixedly installed inside the valve body. During the actual installation process, the position of the wiring port of the explosion-proof valve is relatively fixed. Restricted by the position of the wiring port, it is not easy to install the wiring harness. When the position of the wiring port and the wiring harness is not good, the installation of the wiring harness becomes more complex and cumbersome. If care is not taken during the installation process, the wiring harness may be entangled, which is likely to affect the service life of the wiring harness. The entangled wiring harness may also affect the resistance and increase potential safety hazards. Therefore, it is necessary to make improvements. Content of the Utility Model

[0004] The purpose of the utility model is to provide an explosion-proof valve aiming at the defects and deficiencies of the prior art, which has a simple and reasonable structure, is convenient to operate, the wiring seat can rotate to facilitate the user to wire, and at the same time, it can avoid excessive rotation of the wiring seat so as to prevent the wiring harness from being entangled and extend the service life of the wiring harness.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An explosion-proof valve described in the utility model includes a pilot valve seat and a valve body connected to the pilot valve seat. A coil is arranged inside the pilot valve seat. A wiring seat electrically connected to the coil is movably connected to the pilot valve seat. The lower end of the wiring seat extends into the upper end of the pilot valve seat and has a clearance fit with the pilot valve seat. An annular groove is arranged along the circumferential direction on the inner wall of the upper end of the pilot valve seat. A notch groove communicating with the annular groove is arranged on the annular groove. The notch groove extends upward along the axial direction of the pilot valve seat. A convex block is arranged on the outer wall of the lower end of the wiring seat. The convex block enters the annular groove through the notch groove and is slidably connected with the annular groove. A locking member is arranged on the side wall of the pilot valve seat. The locking member extends into the annular groove and abuts against the wiring seat to fix the wiring seat inside the pilot valve seat.

[0007] Further, the locking member is a locking screw, and a locking hole matched with the locking screw is arranged on the side wall of the pilot valve seat.

[0008] Further, a first sealing ring is arranged between the pilot valve seat and the wiring seat.

[0009] Furthermore, the wiring seat is provided with a wiring port, and a receiving cavity is formed in the wiring seat, and a wiring terminal electrically connected to the coil is fixedly connected in the receiving cavity.

[0010] Furthermore, a connecting hole is provided at the bottom of the accommodating cavity, and a connecting screw is connected to the connecting terminal, and the connecting screw passes through the connecting terminal and is fixedly connected to the connecting hole.

[0011] Furthermore, an upper end cover is fixedly connected to the upper end of the wiring seat.

[0012] Furthermore, a second sealing ring is provided between the upper end cover and the wiring seat.

[0013] Furthermore, a third sealing ring is provided between the pilot valve seat and the valve body.

[0014] Furthermore, a front end cover is fixedly connected to the front end of the pilot valve seat.

[0015] Furthermore, a fourth sealing ring is provided between the front end cover and the pilot valve seat.

[0016] The beneficial effects of the utility model are as follows: when installing the explosion-proof valve described in the utility model, loosen the locking screw, but do not loosen it completely, align the protrusion with the notch groove, and then clip it in, so that the protrusion can smoothly enter the annular groove, and the protrusion can slide in the annular groove, so that the terminal seat can rotate relative to the pilot valve seat. During the rotation process, the locking screw is not completely loosened, which can prevent the terminal seat from rotating excessively. If the locking screw is completely unscrewed, the terminal seat will be in a state where it can rotate 360 ​​degrees. During this rotation, the internal wiring harness may be entangled and damaged. Therefore, the locking screw needs to maintain a specific state, that is, the locking screw can be against the protrusion, so that the protrusion cannot continue to rotate, thereby preventing the wiring harness from being entangled. After rotating the terminal seat to a suitable position, tighten the locking screw to hold the terminal seat against it and fix it in the pilot valve seat. By adjusting the tightness of the locking screw, it is ensured that the terminal seat can rotate to facilitate user wiring, while preventing the terminal seat from rotating excessively to prevent the wiring harness from being entangled, thereby extending the service life of the wiring harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a partial structural diagram of the pilot valve seat.

[0020] Figures 1-3In the Chinese version: 1. Valve body; 2. Pilot valve seat; 21. Annular groove; 22. Notch groove; 3. Terminal block; 31. Projection; 32. Wiring port; 33. Accommodation cavity; 34. Wiring terminal; 35. Connection hole; 4. Locking part; 41. Locking hole; 5. First sealing ring; 6. Upper end cover; 7. Second sealing ring; 8. Front end cover; 9. Fourth sealing ring. Specific embodiments

[0021] The present utility model will be further described below with reference to the accompanying drawings.

[0022] As Figures 1-3 shown, an explosion-proof valve includes a pilot valve seat 2 and a valve body 1 connected to the pilot valve seat 2. A coil is provided in the pilot valve seat 2. A terminal block 3 electrically connected to the coil is movably connected to the pilot valve seat 2. The lower end of the terminal block 3 extends into the upper end of the pilot valve seat 2 and is in clearance fit with the pilot valve seat 2. Preferably, in this embodiment, the upper end of the terminal block 3 is fixedly connected to an upper end cover 6. Preferably, a second sealing ring 7 is provided between the upper end cover 6 and the terminal block 3 to improve the sealing performance between the upper end cover 6 and the terminal block 3. Preferably, the terminal block 3 is provided with a wiring port 32. Refer to Figure 2 , an accommodation cavity 33 is formed in the terminal block 3. A wiring terminal 34 electrically connected to the coil is fixedly connected in the accommodation cavity 33. A connection hole 35 is provided at the bottom of the accommodation cavity 33. A connection screw is connected to the wiring terminal 34, and the connection screw passes through the wiring terminal 34 and is fixedly connected to the connection hole 35. When wiring, unscrewing the upper end cover 6 facilitates the user's wiring operation. After introducing the wire harness through the wiring port 32, the wire harness is fixed to the wiring terminal 34 by the connection screw. After wiring is completed, the upper end cover 6 is tightened again. Refer to Figure 3 , an annular groove 21 is provided along the circumferential direction on the inner wall of the upper end of the pilot valve seat 2. A notch groove 22 communicating with the annular groove 21 is provided on the annular groove 21. The notch groove 22 extends upward along the axial direction of the pilot valve seat 2. A projection 31 is provided on the outer wall of the lower end of the terminal block 3. The projection 31 enters the annular groove 21 through the notch groove 22 and is slidably connected to the annular groove 21. A locking part 4 is provided on the side wall of the pilot valve seat 2. The locking part 4 extends into the annular groove 21 and abuts against the terminal block 3 to fix the terminal block 3 in the pilot valve seat 2. Preferably, in this embodiment, the locking part 4 is a locking screw, and a locking hole 41 matching the locking screw is provided on the side wall of the pilot valve seat 2.

[0023] During installation, loosen the locking screw but do not fully loosen it. The lower end of the terminal block 3 extends into the upper end interior of the pilot valve seat 2 and has a clearance fit with the pilot valve seat 2. Align the bump 31 with the notch groove 22 and then snap it in so that the bump 31 can smoothly enter the annular groove 21. The bump 31 can slide within the annular groove 21, enabling the terminal block 3 to rotate relative to the pilot valve seat 2. It should be noted that during the rotation process, the locking screw is not fully loosened, which can prevent the terminal block 3 from rotating excessively. If the locking screw is fully unscrewed, the terminal block 3 will be in a state where it can rotate 360 degrees, and the internal wire harness may get entangled during rotation, resulting in damage. Therefore, the locking screw needs to maintain a specific state, that is, the locking screw can abut against the bump 31, thus preventing the bump 31 from continuing to rotate and avoiding wire harness entanglement. After rotating the terminal block 3 to a suitable position, tighten the locking screw to abut against the terminal block 3 and fix it within the pilot valve seat 2. By adjusting the tightness of the locking screw, ensure that the terminal block 3 can rotate conveniently for users to connect wires, while preventing the terminal block 3 from rotating excessively and thereby preventing wire harness entanglement, and prolonging the service life of the wire harness.

[0024] Preferably, in this embodiment, a first sealing ring 5 is provided between the pilot valve seat 2 and the terminal block 3 to improve the sealing performance between the pilot valve seat 2 and the terminal block 3.

[0025] Preferably, in this embodiment, a third sealing ring is provided between the pilot valve seat 2 and the valve body 1, which improves the sealing performance between the pilot valve seat 2 and the valve body 1 and effectively prevents foreign objects from entering and affecting the use.

[0026] Preferably, in this embodiment, a front end cover 8 is fixedly connected to the front end of the pilot valve seat 2. Preferably, in this embodiment, a fourth sealing ring 9 is provided between the front end cover 8 and the pilot valve seat 2 to improve the sealing performance between the front end cover 8 and the pilot valve seat 2 and can also play a buffering role to absorb the stress generated by reasons such as vibration.

[0027] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. An explosion-proof valve, comprising a pilot valve seat (2) and a valve body (1) connected to the pilot valve seat (2), wherein a coil is provided in the pilot valve seat (2), and it is characterized in that: A wiring seat (3) electrically connected to a coil is movably connected to the pilot valve seat (2). The lower end of the wiring seat (3) extends into the upper end of the pilot valve seat (2) and is in clearance fit with the pilot valve seat (2). An annular groove (21) is provided along the circumferential direction on the inner wall of the upper end of the pilot valve seat (2). A notch groove (22) communicating with the annular groove (21) is provided on the annular groove (21). The notch groove (22) extends upward along the axial direction of the pilot valve seat (2). A convex block (31) is provided on the outer wall of the lower end of the wiring seat (3). The convex block (31) enters the annular groove (21) through the notch groove (22) and is slidably connected to the annular groove (21). A locking member (4) is provided on the side wall of the pilot valve seat (2). The locking member (4) extends into the annular groove (21) and abuts against the wiring seat (3) to fix the wiring seat (3) in the pilot valve seat (2).

2. The explosion-proof valve according to claim 1, wherein: The locking member (4) is a locking screw, and a locking hole (41) matching the locking screw is provided on the side wall of the pilot valve seat (2).

3. The flameproof valve according to claim 1, wherein: A first sealing ring (5) is provided between the pilot valve seat (2) and the wiring seat (3).

4. The flameproof valve according to claim 1, characterized in that: A wiring port (32) is provided on the wiring seat (3). An accommodating cavity (33) is formed in the wiring seat (3). A wiring terminal (34) electrically connected to the coil is fixedly connected in the accommodating cavity (33).

5. The flameproof valve according to claim 4, wherein: A connecting hole (35) is provided at the bottom of the accommodating cavity (33). A connecting screw is connected to the wiring terminal (34), and the connecting screw passes through the wiring terminal (34) and is fixedly connected to the connecting hole (35).

6. The flameproof valve according to claim 1, characterized in that: An upper end cover (6) is fixedly connected to the upper end of the wiring seat (3).

7. An explosion-proof valve according to claim 6, characterized in that: A second sealing ring (7) is provided between the upper end cover (6) and the wiring seat (3).

8. The explosion-proof valve according to claim 1, wherein: A third sealing ring is provided between the pilot valve seat (2) and the valve body (1).

9. The flameproof valve according to claim 1, characterized in that: A front end cover (8) is fixedly connected to the front end of the pilot valve seat (2).

10. The flameproof valve according to claim 9, characterized in that: A fourth sealing ring (9) is provided between the front end cover (8) and the pilot valve seat (2).

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