Explosion-proof valve capable of rotating at multiple angles

Abstract

The utility model discloses a flame-proof valve capable of rotating at multiple angles, which comprises a valve body, a pilot valve seat and a wire holder, a pilot head component is arranged in the pilot valve seat, the pilot valve seat is rotatably connected with the valve body, the wire holder is rotatably connected with the pilot valve seat, a pin shaft and a rubber part are arranged between the pilot valve seat and the valve body, and the rubber part is arranged in the valve body. The pilot valve seat is provided with an arc-shaped groove in sliding fit with the pin shaft, the valve body is provided with a pin shaft hole matched with the pin shaft, the pilot valve seat is connected with the valve body through the pin shaft and pre-tightens the rubber part, the inner wall of the upper end of the pilot valve seat is provided with an annular groove in the circumferential direction, a notch groove communicated with the annular groove is formed above the annular groove, and the outer wall of the lower end of the wire holder is provided with a protruding block. A locking piece is arranged on the side wall of the pilot valve seat, the locking piece penetrates through the pilot valve seat to enable the wire holder to abut against the interior of the pilot valve seat, the pilot valve seat can rotate relative to the valve body, the wire holder can rotate relative to the pilot valve seat, the flexibility is higher, and wiring of a user is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion isolation valves, and particularly relates to an explosion isolation valve that can rotate at multiple angles. Background Art

[0002] An explosion isolation valve is an important safety device, mainly used in flammable and explosive dangerous places. The power of dust explosion is huge, which not only poses a serious threat to the lives of on-site workers, but also causes huge economic losses and environmental damage. The explosion isolation valve can prevent the explosion from spreading from the initial position to other process units, avoid "secondary" or system explosion accidents, and thus reduce the explosion disaster. Due to its simplicity and reliability, the explosion isolation valve is a relatively popular explosion isolation device in the world.

[0003] The explosion isolation 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 of the explosion isolation valve, special attention needs to be paid to the position of the wiring port to ensure that the wire harness can be correctly and firmly installed in place. However, the position of the wiring port is relatively fixed, which makes the installation work of the wire harness more complex and difficult. Limited by the position of the wiring port, it is very difficult for installers to wire in a flexible manner, thus reducing the efficiency and convenience of the entire installation process. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an explosion isolation valve that can rotate at multiple angles in view of the defects and deficiencies of the prior art. Its structure is simple and reasonable, and it is easy to operate. The pilot valve seat can rotate relative to the valve body, and the wiring seat can rotate relative to the pilot valve seat, with higher flexibility and facilitating wiring for users.

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

[0006] An explosion isolation valve that can rotate at multiple angles according to the utility model includes a valve body, a pilot valve seat, and a wiring seat. The pilot valve seat is arranged at the front end of the valve body, and a pilot head assembly is arranged inside the pilot valve seat. The wiring seat is arranged at the upper end of the pilot valve seat. The pilot valve seat is rotatably connected to the valve body, and the wiring seat is rotatably connected to the pilot valve seat. A pin shaft and a rubber part are arranged between the pilot valve seat and the valve body. An arc-shaped groove that is slidably matched with the pin shaft is arranged on the pilot valve seat, and a pin shaft hole that is matched with the pin shaft is arranged on the valve body. The pilot valve seat is connected to the valve body through the pin shaft and pre-tightens the rubber part. A clearance fit is formed between the pilot valve seat and the wiring seat. A ring groove is arranged along the circumferential direction on the inner wall at the upper end of the pilot valve seat, and a notch groove that is communicated with the ring groove is arranged above the ring groove. A convex block is arranged on the outer wall at the lower end of the wiring seat. The convex block enters the ring groove through the notch groove and is slidably connected to the ring groove. A locking part is arranged on the side wall of the pilot valve seat, and the locking part passes through the pilot valve seat to press the wiring seat tightly into the pilot valve seat.

[0007] Further, the notch groove extends axially upward along the pilot valve seat.

[0008] Further, a wiring port is provided on the wiring base, a receiving cavity is formed inside the wiring base, and a wiring terminal electrically connected to the pilot head assembly is fixedly connected inside the receiving cavity.

[0009] Further, a connection hole is provided at the bottom of the receiving cavity, a connection screw is connected to the wiring terminal, and the connection screw passes through the wiring terminal and is fixedly connected to the connection hole.

[0010] Further, an upper end cover is fixedly connected to the upper end of the wiring base, and a first sealing ring is provided between the upper end cover and the wiring base.

[0011] Further, the locking member is a locking screw, a locking hole matching with the locking screw is provided on the side wall of the pilot valve seat, and the locking screw extends into the annular groove and abuts against the wiring base for cooperation.

[0012] Further, a valve cavity is provided inside the valve body, a valve rod for controlling the air path switching of the valve body is movably provided inside the valve cavity, a rear end cover is provided at the rear end of the valve body, a valve rod spring is abutted between the valve rod and the rear end cover, a piston is provided at the front end of the valve rod, the valve rod abuts against the piston for cooperation, an air vent cavity is provided between the pilot valve seat and the valve body, a pilot hole for communicating the valve cavity and the air vent cavity is provided on the valve body, and the lower end of the pilot head assembly extends into the air vent cavity to control the opening and closing of the pilot hole.

[0013] Further, the pilot head assembly includes a magnetic isolation tube, a coil body, a coil bracket, a static iron core and a moving iron core. A magnetic isolation tube is provided inside the coil bracket, the static iron core is fixedly arranged inside the magnetic isolation tube, the moving iron core is movably arranged inside the magnetic isolation tube and cooperates with the static iron core, the moving iron core extends into the air vent cavity and abuts against the pilot hole for cooperation, a core spring is provided between the moving iron core and the magnetic isolation tube, the rear end of the magnetic isolation tube is fixedly connected to the valve body, and the coil body is arranged between the coil bracket and the magnetic isolation tube.

[0014] Further, a second sealing ring is provided between the wiring base and the pilot valve seat.

[0015] Further, a front end cover is fixedly connected to the front end of the pilot valve seat, and a third sealing ring is abutted between the front end cover and the pilot valve seat.

[0016] The beneficial effects of the utility model are as follows: the utility model is a kind of explosion-proof valve that can rotate at multiple angles, the pilot valve seat can rotate relative to the valve body, and the terminal seat can rotate relative to the pilot valve seat, which has higher flexibility and is convenient for users to connect wires. The rubber part provides a damping force. When the pilot valve seat needs to be rotated, the user only needs to apply force to overcome the damping force provided by the rubber part to rotate the pilot valve seat. The pilot valve seat is not easy to shake or shift after rotating under the action of the damping force. When installing the terminal seat, loosen the locking screw, but do not loosen it completely. The lower end of the terminal seat extends into the upper end of the pilot valve seat and is in a clearance fit with the pilot valve seat. Align the protrusion with the notch groove and then snap it in so that the protrusion can smoothly enter the annular groove. The protrusion can slide in the annular groove, so that the terminal seat can rotate relative to the pilot valve seat. It should be noted that during the rotation of the terminal seat, the locking screw does not It is not completely loosened, so as to avoid excessive rotation of the terminal block. If the locking screw is completely unscrewed, the terminal block will be in a state where it can rotate 360 ​​degrees. During this rotation, the internal wiring harness may become entangled, causing damage. Therefore, the locking screw needs to maintain a specific state, that is, the locking screw can be against the bump, so that the bump cannot continue to rotate, to avoid the wiring harness from becoming entangled. After rotating the terminal block to a suitable position, tighten the locking screw to hold the terminal block against it and fix it in the pilot valve seat, ensuring that the terminal block can rotate to facilitate user wiring, while avoiding excessive rotation of the terminal block to prevent wiring harness entanglement and extend the service life of the wiring harness.

[0017] When wiring, unscrew the upper end cover to facilitate the user to perform wiring operations. After introducing the wire harness from the wiring port, fix the wire harness to the wiring terminal with the connecting screws. After the wiring is completed, tighten the upper end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 4 It is a partial enlarged structural schematic diagram of the pilot valve seat.

[0022] Figures 1-4Chinese: 1. Valve body; 11. Pin hole; 12. Rear end cover; 13. Air guide hole; 14. Front chamber; 15. Rear chamber; 2. Pilot valve seat; 21. Arc groove; 22. Ring groove; 23. Notch groove; 24. Front end cover; 241. Third sealing ring; 3. Terminal block; 31. Protrusion; 32. Wiring port; 33. Accommodation cavity; 34. Terminal; 35. Connection hole; 36. Upper end cover; 361. First sealing ring; 37. Second sealing ring; 4. Rubber part; 5. Locking part; 51. Locking hole; 6. Valve stem; 61. Valve stem spring; 62. Piston; 7. Ventilation cavity; 81. Magnetic isolation tube; 811. Fourth sealing ring; 82. Coil body; 83. Coil bracket; 84. Static iron core; 85. Moving iron core; 86. Iron core spring. Detailed implementation mode

[0023] The present utility model will be further described below in conjunction with the accompanying drawings.

[0024] As Figures 1-4 shown, an explosion-proof valve that can rotate at multiple angles includes a valve body 1, a pilot valve seat 2 and a terminal block 3. The pilot valve seat 2 is arranged at the front end of the valve body 1. A pilot head assembly is arranged inside the pilot valve seat 2. The terminal block 3 is arranged at the upper end of the pilot valve seat 2. The pilot valve seat 2 is rotatably connected to the valve body 1, and the terminal block 3 is rotatably connected to the pilot valve seat 2. A second sealing ring 37 is arranged between the terminal block 3 and the pilot valve seat 2 to improve the sealing performance. Specifically, the pilot valve seat 2 can rotate along the axis of the valve body 1, and the terminal block 3 can rotate along the axis of the pilot valve seat 2, with higher flexibility, which is convenient for users to wire. A pin and a rubber part 4 are arranged between the pilot valve seat 2 and the valve body 1. An arc groove 21 that is slidably matched with the pin is arranged on the pilot valve seat 2, so that the pilot valve seat 2 can rotate relative to the valve body 1, and the arc groove 21 can also limit the excessive rotation of the pilot valve seat 2. A pin hole 11 that is matched with the pin is arranged on the valve body 1. The pilot valve seat 2 is connected to the valve body 1 through the pin and pre-tightens the rubber part 4. The rubber part 4 provides a damping force. When it is necessary to rotate the pilot valve seat 2, the user only needs to apply force to overcome the damping force provided by the rubber part 4 to rotate the pilot valve seat 2. After the pilot valve seat 2 rotates under the action of the damping force, it is not easy to shake or shift. A clearance fit is formed between the pilot valve seat 2 and the terminal block 3. Refer to Figure 4 , a ring groove 22 is arranged along the circumferential direction on the inner wall of the upper end of the pilot valve seat 2. A notch groove 23 that is communicated with the ring groove 22 is arranged above the ring groove 22. Preferably, in this embodiment, the notch groove 23 extends upward along the axis of the pilot valve seat 2. A protrusion 31 is arranged on the outer wall of the lower end of the terminal block 3. The protrusion 31 enters the ring groove 22 through the notch groove 23 and is slidably connected to the ring groove 22. A locking part 5 is arranged on the side wall of the pilot valve seat 2. Preferably, in this embodiment, the locking part 5 is a locking screw. A locking hole 51 that is matched with the locking screw is arranged on the side wall of the pilot valve seat 2. Refer to Figure 2, the locking screw extends into the annular groove 22 and abuts against the terminal block 3 to press the terminal block 3 tightly into the pilot valve seat 2, playing a fixing role.

[0025] Preferably, in this embodiment, the terminal block 3 is provided with a wiring port 32, a receiving cavity 33 is formed in the terminal block 3, a wiring terminal 34 electrically connected to the pilot head assembly is fixedly connected in the receiving cavity 33, a connection hole 35 is provided at the bottom of the receiving 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, with a firm connection relationship.

[0026] Preferably, in this embodiment, an upper end cover 36 is fixedly connected to the upper end of the terminal block 3, and a first sealing ring 361 is provided between the upper end cover 36 and the terminal block 3 to improve the sealing performance between the upper end cover 36 and the terminal block 3.

[0027] During installation, loosen the locking screw but do not completely loosen it. The lower end of the terminal block 3 extends into the upper end inside the pilot valve seat 2 and has a clearance fit with the pilot valve seat 2. Align the convex block 31 with the notch groove 23 and then snap it in so that the convex block 31 can smoothly enter the annular groove 22. The convex block 31 can slide in the annular groove 22, enabling the terminal block 3 to rotate relative to the pilot valve seat 2. It should be noted that during the rotation of the terminal block 3, the locking screw is not completely loosened, which can prevent the terminal block 3 from rotating excessively. If the locking screw is completely unscrewed, the terminal block 3 will be in a state of 360-degree rotation, 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 convex block 31, so that the convex block 31 cannot continue to rotate, avoiding wire harness entanglement. After rotating the terminal block 3 to a suitable position, tighten the locking screw to press the terminal block 3 and fix it in the pilot valve seat 2. By adjusting the tightness of the locking screw, ensure that the terminal block 3 can rotate conveniently for the user to wire, while preventing the terminal block 3 from rotating excessively and thus preventing wire harness entanglement, extending the service life of the wire harness.

[0028] When wiring, unscrew the upper end cover 36 to facilitate the user's wiring operation. After introducing the wire harness through the wiring port 32, fix the wire harness to the wiring terminal 34 with the connection screw. After wiring is completed, tighten the upper end cover 36 again.

[0029] Preferably, in this embodiment, a valve cavity is provided in the valve body 1. A valve rod 6 for controlling the air path switching of the valve body 1 is movably provided in the valve cavity. The valve cavity includes a front chamber 14 and a rear chamber 15. A rear end cover 12 is provided at the rear end of the valve body 1. A rear chamber 15 is formed between the rear end cover 12 and the valve body 1. A valve rod spring 61 is provided between the valve rod 6 and the rear end cover 12. A piston 62 is provided at the front end of the valve rod 6. The valve rod 6 and the piston 62 are in abutting cooperation. The valve rod spring 61 has a movement tendency to make the valve rod 6 and the piston 62 abut. A front chamber 14 is formed between the front end of the piston 62 and the valve body 1. An air vent cavity 7 is provided between the pilot valve seat 2 and the valve body 1. An air guide hole 13 for communicating the front chamber 14 and the air vent cavity 7 is provided on the valve body 1. The lower end of the pilot head assembly extends into the air vent cavity 7 to control the opening and closing of the air guide hole 13, thereby controlling the movement of the valve rod 6.

[0030] Preferably, in this embodiment, the pilot head assembly includes a magnetic isolation tube 81, a coil body 82, a coil bracket 83, a static iron core 84 and a moving iron core 85. The magnetic isolation tube 81 is provided in the coil bracket 83. The static iron core 84 is fixedly arranged in the magnetic isolation tube 81. The moving iron core 85 is movably arranged in the magnetic isolation tube 81 and cooperates with the static iron core 84. Refer to Figure 3 , the moving iron core 85 extends into the air vent cavity 7 and abuts against the air guide hole 13. A core spring 86 is provided between the moving iron core 85 and the magnetic isolation tube 81. The core spring 86 has a movement tendency to make the moving iron core 85 abut against the air guide hole 13. The rear end of the magnetic isolation tube 81 is fixedly connected to the valve body 1. Specifically, the magnetic isolation tube 81 is fixedly connected to the valve body 1 by threads, and the connection relationship is firm. The coil body 82 is arranged between the coil bracket 83 and the magnetic isolation tube 81.

[0031] When the coil is energized, the static iron core 84 generates a magnetic field. The moving iron core 85 moves towards the static iron core 84 under the action of the magnetic force, opening the air guide hole 13. The gas in the air vent cavity 7 passes through the air guide hole 13 into the front chamber 14, pushing the piston 62 to move, and thus controlling the movement of the valve rod 6. When the coil is de-energized, the moving iron core 85 resets under the elastic force of the core spring 86, closing the air guide hole 13, and the valve rod 6 resets under the action of the valve rod spring 61.

[0032] For the specific structures and working principles of the valve body 1 and the valve rod 6, reference can be made to a two-position five-way explosion-proof valve disclosed in a Chinese patent application (publication number: CN210178669U). In view of the basic structures / principle of the valve body 1 and the valve rod 6 having been disclosed in detail in the prior art, they will not be elaborated herein.

[0033] Preferably, in this embodiment, a fourth sealing ring 811 is provided between the magnetic isolation tube 81 and the valve body 1 to improve the sealing performance between the magnetic isolation tube 81 and the valve body 1.

[0034] Preferably, in this embodiment, a front end cover 24 is fixedly connected to the front end of the pilot valve seat 2, and a third sealing ring 241 is provided between the front end cover 24 and the pilot valve seat 2 to improve the sealing performance between the front end cover 24 and the pilot valve seat 2.

[0035] 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 capable of multi-angle rotation, comprising a valve body (1), a pilot valve seat (2) and a terminal block (3). The pilot valve seat (2) is arranged at the front end of the valve body (1), a pilot head assembly is arranged inside the pilot valve seat (2), and the terminal block (3) is arranged at the upper end of the pilot valve seat (2), characterized in that: The pilot valve seat (2) is rotatably connected to the valve body (1), the wiring seat (3) is rotatably connected to the pilot valve seat (2), a pin shaft and a rubber part (4) are arranged between the pilot valve seat (2) and the valve body (1), an arc-shaped groove (21) which is in sliding fit with the pin shaft is arranged on the pilot valve seat (2), a pin shaft hole (11) which is in fit with the pin shaft is arranged on the valve body (1), the pilot valve seat (2) is connected to the valve body (1) through the pin shaft and the rubber part (4) is pre-tightened, a clearance fit is formed between the pilot valve seat (2) and the wiring seat (3), a ring groove (22) is arranged on the inner wall of the upper end of the pilot valve seat (2) along the circumferential direction, a notch groove (23) which is communicated with the ring groove (22) is arranged above the ring groove (22), a convex block (31) is arranged on the outer wall of the lower end of the wiring seat (3), the convex block (31) enters the ring groove (22) through the notch groove (23) and is in sliding connection with the ring groove (22), a locking part (5) is arranged on the side wall of the pilot valve seat (2), and the locking part (5) passes through the pilot valve seat (2) to press the wiring seat (3) tightly into the pilot valve seat (2).

2. The explosion-proof valve capable of multi-angle rotation according to claim 1, wherein: The notch groove (23) extends axially upward along the pilot valve seat (2).

3. The explosion-proof valve capable of multi-angle rotation according to claim 1, wherein: A wiring port (32) is arranged on the wiring seat (3), a receiving cavity (33) is formed in the wiring seat (3), and a wiring terminal (34) which is electrically connected to the pilot head assembly is fixedly connected in the receiving cavity (33).

4. The explosion-proof valve capable of multi-angle rotation according to claim 3, characterized in that: A connecting hole (35) is arranged at the bottom of the receiving 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).

5. The explosion-proof valve capable of multi-angle rotation according to claim 1, wherein: An upper end cover (36) is fixedly connected to the upper end of the wiring seat (3), and a first sealing ring (361) is arranged between the upper end cover (36) and the wiring seat (3).

6. The explosion-proof valve capable of multi-angle rotation according to claim 1, wherein: The locking part (5) is a locking screw, a locking hole (51) which is in fit with the locking screw is arranged on the side wall of the pilot valve seat (2), and the locking screw extends into the ring groove (22) and is in abutting fit with the wiring seat (3).

7. The explosion-proof valve capable of multi-angle rotation according to claim 1, wherein: A valve cavity is arranged in the valve body (1), a valve rod (6) for controlling the air path switching of the valve body (1) is movably arranged in the valve cavity, a rear end cover (12) is arranged at the rear end of the valve body (1), a valve rod spring (61) is abutted between the valve rod (6) and the rear end cover (12), a piston (62) is arranged at the front end of the valve rod (6), the valve rod (6) is in abutting fit with the piston (62), a ventilation cavity (7) is arranged between the pilot valve seat (2) and the valve body (1), a pilot hole (13) for communicating the valve cavity and the ventilation cavity (7) is arranged on the valve body (1), and the lower end of the pilot head assembly extends into the ventilation cavity (7) to control the opening and closing of the pilot hole (13).

8. The explosion-proof valve capable of multi-angle rotation according to claim 7, characterized in that: The pilot head assembly includes a magnetic isolation tube (81), a coil body (82), a coil bracket (83), a stationary iron core (84) and a movable iron core (85). The magnetic isolation tube (81) is arranged inside the coil bracket (83). The stationary iron core (84) is fixedly arranged inside the magnetic isolation tube (81). The movable iron core (85) is movably arranged inside the magnetic isolation tube (81) and cooperates with the stationary iron core (84). The movable iron core (85) extends into the air vent cavity (7) and abuts against the air guide hole (13). A iron core spring (86) is arranged between the movable iron core (85) and the magnetic isolation tube (81). The rear end of the magnetic isolation tube (81) is fixedly connected to the valve body (1). The coil body (82) is arranged between the coil bracket (83) and the magnetic isolation tube (81).

9. The explosion-proof valve capable of multi-angle rotation according to claim 1, characterized in that: A second sealing ring (37) is arranged between the wiring seat (3) and the pilot valve seat (2).

10. The explosion-proof valve capable of multi-angle rotation according to claim 1, characterized in that: A front end cover (24) is fixedly connected to the front end of the pilot valve seat (2). A third sealing ring (241) is arranged between the front end cover (24) and the pilot valve seat (2).

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