A directional pressure relief device for an explosion-proof motor terminal cavity

Abstract

This utility model relates to the field of directional pressure relief devices, specifically a directional pressure relief device for an explosion-proof motor wiring cavity. It includes a directional pressure relief device body, with an alarm mechanism on one side of the body. The alarm mechanism includes a connecting pipe, one end of which is fixedly connected to one side of the directional pressure relief device body. When the internal pressure of the directional pressure relief device body exceeds the pressure value of the pressure spring, a push block is pushed to move. The push block drives a push rod to move, which in turn drives a trigger block to move. When the trigger block contacts a trigger switch, the alarm sounds, achieving the desired alarm effect. This solves the problem that traditional directional pressure relief devices for explosion-proof motor wiring cavities have a simple structure, lack alarm functionality, and make it difficult for operators to visually detect pressure abnormalities, easily missing the optimal time for pressure adjustment, potentially leading to a continuous rise in pressure until the pressure relief device is activated, or even causing equipment damage.

Description

Technical Field

[0001] This utility model relates to the field of directional pressure relief devices, specifically a directional pressure relief device for the wiring cavity of an explosion-proof motor. Background Technology

[0002] A directional pressure relief device is a safety device that automatically releases excess pressure in a designated direction when the pressure inside an equipment or container exceeds the safe range. Its core function is to reduce the risk of explosion caused by overpressure and reduce potential harm to the surrounding environment and personnel by precisely controlling the pressure release path.

[0003] Traditional explosion-proof motor wiring chamber directional pressure relief devices have a relatively simple structure and lack alarm functions. Operators may find it difficult to visually detect pressure abnormalities, easily miss the best time to adjust the pressure, and may cause the pressure to continue to rise until the pressure relief device is activated, or even cause equipment damage. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, traditional directional pressure relief devices for explosion-proof motor wiring cavities have a relatively simple structure and lack alarm functions. Operators find it difficult to visually detect pressure abnormalities and may easily miss the optimal time for pressure adjustment, which could lead to a continuous rise in pressure until the pressure relief device is activated, or even cause equipment damage. This utility model proposes a directional pressure relief device for explosion-proof motor wiring cavities.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a directional pressure relief device for an explosion-proof motor wiring cavity, including a directional pressure relief device body, and an alarm mechanism is provided on one side of the directional pressure relief device body;

[0006] The alarm mechanism includes a connecting pipe, one end of which is fixedly connected to one side of the directional pressure relief device body, and the other end of which is fixedly connected to a first cavity. A second cavity is fixedly connected to one side of the first cavity, and a vent pipe is fixedly connected to the other side of the first cavity. A connecting cylinder is fixedly connected to one end of the second cavity, and an alarm is fixedly connected to one side of the connecting cylinder. A connecting ring is fixedly connected to the inner cavity of the first cavity, and a push block is movably connected to the inner cavity of the connecting ring. A push rod is fixedly connected to one side of the push block, and a trigger block is fixedly connected to one end of the push rod. A trigger switch is movably connected to one side of the trigger block, and one side of the trigger switch is fixedly connected to one side of the alarm.

[0007] Preferably, one end of the push rod is movably connected to a guide plate, and one side of the guide plate is fixedly connected to the inner cavity of the first cavity.

[0008] Preferably, a pressure spring is slidably sleeved on the surface of the push rod, and fixed plates are fixedly connected to both ends of the pressure spring. One side of the fixed plate is movably connected to the inner cavity of the second cavity, and the inner cavity of the fixed plate is fixedly connected to the other end of the push rod.

[0009] Preferably, a limiting groove is formed on one side of the inner cavity of the second cavity, and a limiting block is movably connected to the inner cavity of the limiting groove. One side of the limiting block is fixedly connected to one side of the fixing plate.

[0010] Preferably, a protective mechanism is provided on one side of the connecting cylinder. The protective mechanism includes a mounting plate, one side of which is fixedly connected to one side of the connecting cylinder. A fixing block is fixedly connected to one side of the mounting plate. There are four fixing blocks, arranged in pairs. A bidirectional threaded rod is movably connected to one side of the inner cavity of the fixing block. A rotating block is fixedly connected to one end of the bidirectional threaded rod. A connecting block is threadedly connected to the surface of the bidirectional threaded rod. There are four connecting blocks, arranged in pairs. A protective cover is fixedly connected to one side of the connecting block. There are two protective covers. One side of the protective cover is movably connected to the surface of the alarm.

[0011] Preferably, the inner cavity of another set of connecting blocks is movably connected to a guide post, both ends of which are fixedly connected to one side of the fixing block.

[0012] Preferably, the protective cover has a sound-permeable hole on one side, and the number of such sound-permeable holes is multiple.

[0013] The advantages of this utility model are:

[0014] When the internal pressure of the directional pressure relief device exceeds the pressure value of the pressure spring, the push block moves, which in turn moves the push rod, which in turn moves the trigger block. When one side of the trigger block contacts the side of the trigger switch, the alarm sounds, achieving the alarm effect. This solves the problem that traditional directional pressure relief devices for explosion-proof motor wiring cavities have a simple structure, lack alarm function, and make it difficult for operators to visually detect pressure abnormalities. This can easily lead to missing the best time for pressure adjustment, potentially causing the pressure to rise continuously until the pressure relief device is activated, or even causing equipment damage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection of the first cavity structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection of the fixing plate structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the trigger block structure connection of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure of the protective cover of this utility model.

[0021] In the diagram: 1. Directional pressure relief device body; 2. Alarm mechanism; 201. Connecting pipe; 202. First cavity; 203. Second cavity; 204. Vent pipe; 205. Connecting cylinder; 206. Alarm; 207. Connecting ring; 208. Guide plate; 209. Fixing plate; 210. Push rod; 211. Limiting block; 212. Pressure spring; 213. Limiting groove; 214. Trigger block; 215. Trigger switch; 216. Push block; 3. Protective mechanism; 301. Mounting plate; 302. Bidirectional threaded rod; 303. Rotating block; 304. Connecting block; 305. Fixing block; 306. Protective cover; 307. Sound transmission hole; 308. Guide column. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a directional pressure relief device for the wiring cavity of an explosion-proof motor. (Refer to...) Figure 1 , Figure 2 and Figure 3 A directional pressure relief device for an explosion-proof motor wiring cavity includes a directional pressure relief device body 1, an alarm mechanism 2 is provided on one side of the directional pressure relief device body 1, and the directional pressure relief device body 1 is composed of a loading mechanism, a valve disc assembly and auxiliary components.

[0025] The alarm mechanism 2 includes a connecting pipe 201. One end of the connecting pipe 201 is fixedly connected to one side of the directional pressure relief device body 1, and the other end of the connecting pipe 201 is fixedly connected to a first cavity 202. One side of the first cavity 202 is fixedly connected to a second cavity 203, and the other side of the first cavity 202 is fixedly connected to a vent pipe 204. One end of the second cavity 203 is fixedly connected to a connecting cylinder 205, and one side of the connecting cylinder 205 is fixedly connected to an alarm 206. The inner cavity of the first cavity 202 is fixedly connected to a connecting ring 207, and the inner cavity of the connecting ring 207 is movably connected to a push block 216. One side of the push block 216 is fixedly connected to a push rod 210, one end of the push rod 210 is fixedly connected to a trigger block 214, one side of the trigger block 214 is movably connected to a trigger switch 215, and one side of the trigger switch 215 is fixedly connected to one side of the alarm 206.

[0026] Reference Figure 3 One end of the push rod 210 is movably connected to the guide plate 208. One side of the guide plate 208 is fixedly connected to the inner cavity of the first cavity 202. The guide plate 208 can guide the movement of the push rod 210, making the push rod 210 more stable during the pushing process and avoiding shaking.

[0027] Reference Figure 3 A pressure spring 212 is slidably sleeved on the surface of the push rod 210. The two ends of the pressure spring 212 are fixedly connected to the fixing plate 209. One side of the fixing plate 209 is movably connected to the inner cavity of the second cavity 203, and the inner cavity of the fixing plate 209 is fixedly connected to the other end of the push rod 210. With the setting of the pressure spring 212, when the fixing plate 209 moves, the pressure spring 212 is compressed and deformed. After the pressure spring 212 loses its compression force, it can drive the push rod 210 to reset, so that the push block 216 fits tightly against the inside of the connecting ring 207.

[0028] Reference Figure 3 A limiting groove 213 is provided on one side of the inner cavity of the second cavity 203. A limiting block 211 is movably connected to the inner cavity of the limiting groove 213. One side of the limiting block 211 is fixedly connected to one side of the fixing plate 209. By setting the limiting block 211, the position of the other fixing plate 209 can be limited, so as to prevent the other fixing plate 209 from detaching from the inner cavity of the second cavity 203 under the elastic action of the pressure spring 212.

[0029] Reference Figure 5A protective mechanism 3 is provided on one side of the connecting cylinder 205. The protective mechanism 3 includes a mounting plate 301. One side of the mounting plate 301 is fixedly connected to one side of the connecting cylinder 205. A fixing block 305 is fixedly connected to one side of the mounting plate 301. There are four fixing blocks 305, arranged in pairs. A bidirectional threaded rod 302 is movably connected to one side of the inner cavity of the fixing block 305. A rotating block 303 is fixedly connected to one end of the bidirectional threaded rod 302. A connecting block 304 is threadedly connected to the surface of the bidirectional threaded rod 302. There are four connecting blocks 304, arranged in pairs. A protective cover 306 is fixedly connected to one side of the connecting block 304. There are two protective covers 306. One side of the protective cover 306 is movably connected to the surface of the alarm 206. The protective cover 306 can protect the alarm 206 and prevent it from being damaged by external forces, thus affecting its operation.

[0030] Reference Figure 5 Another set of connecting blocks 304 has a guide post 308 movably connected to its inner cavity. Both ends of the guide post 308 are fixedly connected to one side of the fixing block 305. The guide post 308 can guide the movement of the protective cover 306, making the protective cover 306 more stable during movement and preventing the protective cover 306 from shifting during movement.

[0031] Reference Figure 5 The protective cover 306 has a sound-permeable hole 307 on one side. There are multiple sound-permeable holes 307. By setting the sound-permeable holes 307, the barrier of sound transmission is broken. When the alarm 206 is triggered, the generated sound waves can spread rapidly to the outside through the sound-permeable holes 307, avoiding the formation of sound wave reflection and concentration inside the protective cover 306.

[0032] Working principle: The directional pressure relief device body 1 is fixed to one side of the explosion-proof motor wiring cavity. The directional pressure relief device body 1 consists of a loading mechanism, a valve disc assembly, and auxiliary components working together to achieve precise pressure relief. During installation, the spring in the loading mechanism is compressed by adjusting the screw, generating a downward preload. This preload is transmitted to the valve disc via the valve stem, forcing the valve disc to fit tightly against the valve seat, forming an initial seal and preventing internal gas leakage. When the pressure inside the wiring cavity exceeds a set threshold, the gas pressure overcomes the spring preload, pushing the valve disc upward to open the pressure relief channel. The valve seat outlet in the valve disc assembly is connected to the guide pipe or pressure relief cavity, forming a directional discharge path. After the high-pressure gas is discharged from the gap between the valve disc and the valve seat, it is guided to a safe area through the flow guiding structure to prevent the explosion energy from spreading in a dangerous direction, ensuring the safety of surrounding equipment and personnel. The valve stem in the auxiliary component moves linearly within the guide sleeve, strictly constraining its movement trajectory to prevent valve disc deviation. This design effectively reduces wear on the sealing surfaces of the valve disc and valve seat, avoids jamming, and ensures stable and reliable pressure relief action. This allows the device to maintain good sealing performance and response efficiency even after multiple start-ups and shutdowns. The operator rotates the rotating block 303 to drive the bidirectional threaded rod 302 to rotate. The threaded connection between the bidirectional threaded rod 302 and the connecting block 304 causes the connecting block 304 to move. The connecting block 304 drives the protective cover 306 to move. The protective cover 306 then drives another set of connecting blocks 304 to move on the surface of the guide post 308. The guide post 308 guides the movement of the protective cover 306. The protective cover 306 protects the alarm 206, preventing damage to the alarm 206 due to operator negligence. When the internal pressure of the directional pressure relief device 1 exceeds the preload setting of the pressure spring 212, high-pressure gas flows rapidly into the first chamber 202 through the connecting pipe 201. Under the action of gas pressure, the push block 216 overcomes the spring resistance and moves upward, opening the pressure relief channel and quickly discharging through the vent pipe 204, thus achieving directional pressure relief. Under the action of gas thrust, the push block 216 drives the push rod 210 to move upward along the guide structure of the guide plate 208. The movement of the push rod 210 drives the fixed plate 209 to move synchronously, thereby causing the limit block 211 to slide in the limit groove 213, ensuring a stable movement trajectory. During this process, the fixed plate 209 compresses the pressure spring 212, causing it to undergo elastic deformation and accumulate reset potential energy. The push rod 210 rises, causing the trigger block 214 to gradually approach and touch the trigger switch 215. Since the trigger switch 215 is directly connected to the alarm 206, a closed circuit is formed at the moment of triggering, causing the alarm 206 to immediately issue an audible and visual alarm, promptly reminding the staff that the equipment has abnormal pressure and needs to be inspected and maintained.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A directional pressure relief device for an explosion-proof motor terminal cavity, comprising a directional pressure relief device body (1), characterized in that: An alarm mechanism (2) is provided on one side of the directional pressure relief device body (1); The alarm mechanism (2) includes a connecting pipe (201), one end of which is fixedly connected to one side of the directional pressure relief device body (1), and the other end of which is fixedly connected to a first cavity (202). A second cavity (203) is fixedly connected to one side of the first cavity (202), and a vent pipe (204) is fixedly connected to the other side of the first cavity (202). One end of the second cavity (203) is fixedly connected to a connecting cylinder (205). An alarm (206) is fixedly connected to one side. A connecting ring (207) is fixedly connected to the inner cavity of the first cavity (202). A push block (216) is movably connected to the inner cavity of the connecting ring (207). A push rod (210) is fixedly connected to one side of the push block (216). A trigger block (214) is fixedly connected to one end of the push rod (210). A trigger switch (215) is movably connected to one side of the trigger block (214). One side of the trigger switch (215) is fixedly connected to one side of the alarm (206).

2. A directional pressure relief device for an explosion-proof motor terminal cavity according to claim 1, characterized in that: One end of the push rod (210) is movably connected to a guide plate (208), and one side of the guide plate (208) is fixedly connected to the inner cavity of the first cavity (202).

3. A directional pressure relief device for an explosion-proof motor terminal cavity according to claim 1, characterized in that: A pressure spring (212) is slidably sleeved on the surface of the push rod (210). A fixing plate (209) is fixedly connected to both ends of the pressure spring (212). One side of the fixing plate (209) is movably connected to the inner cavity of the second cavity (203), and the inner cavity of the fixing plate (209) is fixedly connected to the other end of the push rod (210).

4. A directional pressure relief device for an explosion-proof motor terminal cavity according to claim 1, characterized in that: A limiting groove (213) is provided on one side of the inner cavity of the second cavity (203). A limiting block (211) is movably connected to the inner cavity of the limiting groove (213). One side of the limiting block (211) is fixedly connected to one side of the fixing plate (209).

5. A directional pressure relief device for an explosion-proof motor terminal cavity according to claim 1, characterized in that: A protective mechanism (3) is provided on one side of the connecting cylinder (205). The protective mechanism (3) includes a mounting plate (301). One side of the mounting plate (301) is fixedly connected to one side of the connecting cylinder (205). A fixing block (305) is fixedly connected to one side of the mounting plate (301). There are four fixing blocks (305) in pairs. A bidirectional threaded rod (302) is movably connected to one side of the inner cavity of the fixing block (305). A rotating block (303) is fixedly connected to one end of the bidirectional threaded rod (302). A connecting block (304) is threadedly connected to the surface of the bidirectional threaded rod (302). There are four connecting blocks (304) in pairs. A protective cover (306) is fixedly connected to one side of the connecting block (304). There are two protective covers (306). One side of the protective cover (306) is movably connected to the surface of the alarm (206).

6. A directional pressure relief device for an explosion-proof motor terminal cavity according to claim 5, characterized in that: Another set of connecting blocks (304) has a guide post (308) movably connected to its inner cavity. Both ends of the guide post (308) are fixedly connected to one side of the fixing block (305).

7. A directional pressure relief device for an explosion-proof motor wiring cavity according to claim 5, characterized in that: The protective cover (306) has a sound-permeable hole (307) on one side, and there are multiple sound-permeable holes (307).

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