Explosion-proof electrical high-voltage control cabinet

Abstract

The application discloses an explosion-proof electrical high-voltage control cabinet and relates to the technical field of electrical control cabinets. The explosion-proof electrical high-voltage control cabinet comprises an outer cabinet, an explosion-proof electrical box which is adapted to be installed in the inner part of the outer cabinet, and a pressure relief unit which is adapted to be installed above the explosion-proof electrical box. The pressure relief unit comprises an automatic pressure relief assembly which is adapted to be installed on the top of the explosion-proof electrical box. The automatic pressure relief assembly comprises a plurality of pressure relief cylinders which are connected through the top of the explosion-proof electrical box. An inner part of each of the pressure relief cylinders is slidably provided with a movable plug. In the application, the inner pressure of the explosion-proof electrical box directly drives the stroke height of the movable plug to distinguish between two working conditions of micro-pressure temperature rise and high-pressure deflagration. The application replaces the existing mode of arranging electrical detection elements in an explosion-proof sealed cavity, realizes small-stroke self-adaptive closed-cycle cooling pressure stabilization, large-stroke full-channel directional pressure relief explosion prevention, and realizes the combination of pressure relief and heat dissipation.

Description

Technical Field

[0001] This invention belongs to the field of electrical control cabinet technology, specifically an explosion-proof high-voltage electrical control cabinet. Background Technology

[0002] Explosion-proof high-voltage electrical control cabinets are indispensable power distribution and control equipment in high-risk working conditions such as petrochemical, coal mining, and lithium battery production where explosive gases or dust are present. Their core design requirements combine explosion-proof protection, heat dissipation during operation, and overpressure relief. They must block the external transmission of internal electrical fault energy through a sealed explosion-proof structure to prevent ignition of the external hazardous environment, while ensuring the heat dissipation requirements for stable operation of internal high-voltage components. At the same time, they must have the ability to safely release overpressure under fault deflagration. Currently, the industry's conventional solutions mostly adopt a split architecture with an independently arranged closed-loop cooling system and an independent pressure relief mechanism. The start and stop of heat dissipation and the triggering of pressure relief generally rely on temperature and pressure electrical sensors built into the explosion-proof cavity to collect operating condition signals, and then drive the corresponding actuators to complete the action through the electrical control system.

[0003] However, existing electrically triggered systems have several inherent technical defects. To collect operating parameters, electrical detection components and matching leads need to be installed in the explosion-proof sealed cavity. This not only damages the sealing integrity of the explosion-proof cavity, but also poses the problem of instantaneous high temperature and electric arc directly burning the built-in sensors and signal lines in the event of an internal explosion, directly causing the monitoring system to fail completely, resulting in incorrect operating condition identification and failure to trigger protective actions. At the same time, the independently set cooling and pressure relief systems have independent trigger logic, which cannot accurately distinguish between the micro pressure difference generated by slow temperature rise and the instantaneous high-pressure shock wave of an explosion. There is an inherent contradiction in the trigger threshold setting. If the threshold is too low, it will easily cause the pressure relief mechanism to malfunction. If the threshold is too high, the heat dissipation response will be delayed, making it difficult to meet the dual requirements of heat dissipation and pressure stabilization during steady-state operation and explosion-proof pressure relief during fault conditions. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention proposes an explosion-proof electrical high-voltage control cabinet.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An explosion-proof high-voltage electrical control cabinet includes an outer cabinet, an explosion-proof electrical box adapted to be installed inside the outer cabinet, and a pressure relief unit installed above the explosion-proof electrical box inside the outer cabinet. The pressure relief unit includes:

[0007] An automatic pressure relief assembly is adapted to be installed on the top of an explosion-proof electrical box. The automatic pressure relief assembly includes several pressure relief cylinders that are connected to the top of the explosion-proof electrical box. Each pressure relief cylinder has a movable plug that is slidably installed inside. The gap between the pressure relief cylinder and the movable plug is sealed. Each pressure relief cylinder has a connecting port and a pressure relief groove, and the pressure relief groove is located above the connecting port. The multiple pressure relief cylinders are connected by a connecting pipe through the connecting ports. Some of the pressure relief cylinders are also provided with airflow ports at the same height as the connecting pipe.

[0008] A cooling assembly is located on the back side of the explosion-proof electrical box. The cooling assembly is used to cool the gas leaking from the gas outlet and then re-supply it to the interior of the explosion-proof electrical box.

[0009] The safety bar is fixedly connected to the inner wall of the outer cabinet via a bar seat, and the movable plug has a movable groove. The safety bar is inserted into the inner side of multiple movable grooves to play a primary impact resistance role.

[0010] The second connecting frame and the hollow base are fixedly installed on multiple movable plugs. The hollow base is fixedly installed on the inner top of the outer cabinet. An impact-resistant component capable of reducing the explosive impact force is installed between the second connecting frame and the hollow base, which plays a secondary impact-resistant role.

[0011] As a further preferred embodiment of this technical solution: a fixed seat is provided on the outer wall of the pressure relief cylinder, and a spring is sleeved on the outer side of the movable plug, with one end of the spring connected to the fixed seat and the other end connected to the second connecting frame.

[0012] As a further preferred embodiment of this technical solution: each of the movable plugs is provided with an iron block at its top;

[0013] The pressure relief unit also includes a shrinkage component, and the bottom of the shrinkage component is provided with an electromagnet that corresponds to and cooperates with the iron block.

[0014] The outer cabinet is equipped with a carbon rod, on which an induction generating element is mounted. The second connecting frame is connected to a follower seat via an extension frame, and the follower seat is equipped with an induction receiving coil that works in conjunction with the induction generating element.

[0015] As a further preferred embodiment of this technical solution, it also includes a central control system, which is used to control the start and stop of the electromagnet and the gas circulation pump. The electromagnet receives signals from the induction generating element through the induction receiving coil and transmits them to the central control system. Then, the central control system controls the electromagnet and the gas circulation pump to start simultaneously and then shut down at a specified time.

[0016] As a further preferred embodiment of this technical solution: the cooling assembly includes:

[0017] Multiple circulating air pipes are provided, and each circulating air pipe is respectively installed on an air outlet. The end of each circulating air pipe away from the air outlet is connected to the explosion-proof electrical box. Each circulating air pipe is provided with a solenoid valve, a gas circulation pump and a one-way air flow valve in sequence in the direction extending from the air outlet to the explosion-proof electrical box. The solenoid valve is used to control the opening and closing of the circulating air pipe. The gas circulation pump is used to circulate the gas from the explosion-proof electrical box and return it to the explosion-proof electrical box. The gas circulation pump is connected to the inside of the outer cabinet through a support and is used to control the airflow to move only from the air outlet to the direction extending from the explosion-proof electrical box.

[0018] The condenser is located in the gap between the outer cabinet and the explosion-proof electrical box, and is arranged on the outside of the multiple circulating gas pipes.

[0019] As a further preferred embodiment of this technical solution: the shrinkage component includes:

[0020] A sliding rod is slidably disposed inside a hollow base, and a base is provided at the bottom of the sliding rod, with the electromagnet disposed at the bottom of the base;

[0021] A support plate is mounted on the base, and a lifting frame for lifting the support plate is fixedly connected to the second connecting frame.

[0022] As a further preferred embodiment of this technical solution: the impact-resistant component includes:

[0023] The steel bar is fixedly connected to the second connecting frame;

[0024] The sleeve is connected to the bottom surface of the hollow base via a mounting block;

[0025] Several impact-resistant blocks are provided and fixedly arranged layer by layer on the inner wall of the sleeve, located above the steel bar.

[0026] As a further preferred embodiment of this technical solution: the solenoid valve is provided with a slide rail, and a conductive copper rod is provided on the inner side of the slide rail; the second connecting frame is connected to a sliding seat through the first connecting frame, and a conductive switch is provided on the inner side of the sliding seat to cooperate with the conductive copper rod.

[0027] As a further preferred embodiment of this technical solution: a buffer chamber is fixedly provided on the pressure relief cylinder and covers the outside of the pressure relief groove, and several connection ports are provided on the pressure relief cylinder.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. In this invention, the internal air pressure of the explosion-proof electrical box directly drives the stroke height of the movable plug to distinguish between two working conditions: micro-pressure temperature rise and high-pressure deflagration. This replaces the existing method of arranging electrical detection elements in the explosion-proof sealed cavity, realizing small-stroke adaptive closed-loop cooling and pressure stabilization, and large-stroke full-channel directional pressure relief for explosion prevention. It achieves both pressure relief and heat dissipation, and solves the common industry problems of probe burnout, monitoring failure, and incorrect working condition identification caused by the requirement of built-in temperature and pressure sensors in existing electrical control and monitoring schemes.

[0030] 2. In this invention, the instantaneous ultra-large displacement is first limited by the safety rod to buy critical action time for the airflow vent to be locked. Then, the residual explosive impact force is absorbed layer by layer by the progressively destructive impact-resistant blocks to achieve graded unloading of impact energy. This ensures that the air duct is isolated in time to protect the cooling system during the explosion, while also preserving the overall explosion-proof structure of the outer cabinet to the greatest extent. After a failure, only a small amount of impact-resistant consumables need to be replaced for reuse. It has the controllable wear and tear and reusability that existing rigid explosion-proof structures do not have. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is an exploded view of the overall structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the pressure relief unit of the present invention;

[0034] Figure 4 This is a partial cross-sectional view of the automatic pressure relief assembly of the present invention;

[0035] Figure 5 This is a schematic diagram of the cooling assembly of the present invention;

[0036] Figure 6 for Figure 3 Schematic diagram of the structure at point A in the middle;

[0037] Figure 7 for Figure 3 Schematic diagram of the structure at point B;

[0038] Figure 8 This is a partial structural schematic diagram of the pressure relief unit of the present invention;

[0039] Figure 9 This is a partial schematic diagram of the impact-resistant component of the present invention;

[0040] Figure 10 This is a partial exploded view of the shrinkage component of the present invention.

[0041] Legend: 1. Outer cabinet; 2. Explosion-proof electrical box; 3. Pressure relief unit; 31. Automatic pressure relief assembly; 311. Pressure relief cylinder; 3111. Connection port; 3112. Fixing base; 3113. Pressure relief groove; 312. Movable plug; 3121. Movable groove; 313. Spring; 314. Connecting pipe; 32. Cooling assembly; 321. Circulating air pipe; 322. Solenoid valve; 323. Slide rail; 324. Conductive copper rod; 325. Sliding seat; 326. No. 1 connecting frame; 327. Condenser; 328. Gas circulation pump 329. One-way airflow valve; 3291. Support; 33. Buffer chamber; 34. Impact-resistant assembly; 341. Steel rod; 342. Sleeve; 343. Impact-resistant block; 344. Mounting block; 35. Safety bar; 351. Rod seat; 36. No. 2 connecting frame; 37. Hollow seat; 38. Retraction assembly; 381. Sliding rod; 382. Base; 383. Support plate; 39. Lifting frame; 310. Electromagnet; 3101. Iron block; 3102. Follower seat; 3103. Inductive receiving coil; 3104. Carbon rod. Detailed Implementation

[0042] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-10 This application provides an explosion-proof high-voltage electrical control cabinet, including an outer cabinet 1, and an explosion-proof electrical box 2 adapted to be installed inside the outer cabinet 1. It should be noted that the outer cabinet 1 serves as an explosion-proof enclosure, while the explosion-proof electrical box 2 is a sealed cabinet, and all electrical control components are installed inside the explosion-proof electrical box 2. This is an existing product, and both the outer cabinet 1 and the explosion-proof electrical box 2 are generally made of high-strength steel or alloy to provide explosion protection. The outer cabinet 1 also has a pressure relief unit 3 installed above the explosion-proof electrical box 2, wherein the pressure relief unit 3 includes:

[0044] An automatic pressure relief assembly 31 is adapted to be installed on the top of the explosion-proof electrical box 2. The automatic pressure relief assembly 31 includes several pressure relief cylinders 311 that are connected to the top of the explosion-proof electrical box 2. Each pressure relief cylinder 311 has a movable plug 312 that is slidably installed inside. It should be noted that the pressure relief cylinders 311 and the movable plugs 312 are made of the same explosion-proof material as the explosion-proof electrical box 2. The gap between the pressure relief cylinders 311 and the movable plugs 312 is sealed. The pressure relief cylinders 311 are provided with a connecting port and a pressure relief groove 3113, and the pressure relief groove 3113 is located above the connecting port. The connecting ports are connected by a connecting pipe 314, and some pressure relief cylinders 311 are also provided with airflow ports at the same height as the connecting pipe 314. It should be noted that the part mentioned here refers to the pressure relief cylinders 311 near the cooling assembly 32, which are provided with airflow ports.

[0045] Cooling assembly 32 is located on the back side of explosion-proof electrical box 2. Cooling assembly 32 is used to cool the gas leaking from the gas outlet and re-supply it to the interior of explosion-proof electrical box 2.

[0046] The safety bar 35 is fixedly connected to the inner wall of the outer cabinet 1 via the bar seat 351, and the movable plug 312 has a movable groove 3121. The safety bar 35 is inserted into the inner side of multiple movable grooves 3121 to play a first-level impact resistance role.

[0047] The second connecting frame 36 and the hollow seat 37 are fixedly installed on multiple movable plugs 312. The hollow seat 37 is fixedly installed on the inner top of the outer cabinet 1. An impact-resistant component 34 that can reduce the explosive impact force is installed between the second connecting frame 36 and the hollow seat 37, which plays a secondary impact-resistant role.

[0048] Specifically, during normal use, the electrical control components operate normally inside the explosion-proof electrical box 2. If, even with adequate heat dissipation, localized overheating occurs inside the explosion-proof electrical box 2, or if the load on the electrical control components increases, leading to inadequate heat dissipation, the internal air pressure of the explosion-proof electrical box 2 increases and tends to leak out. In this case, the air pressure pushes the movable plug 312 inside the pressure relief cylinder 311 upwards. Airflow enters from the cooling assembly 32 for cooling and then flows back into the explosion-proof electrical box 2, completing the cooling process and removing heat. However, if the interior of the explosion-proof electrical box 2 catches fire or explodes due to unforeseen factors, the movable plug 312 causes the second connecting frame 36 to rise. The depressurized airflow exits from the pressure relief groove 3113, which has numerous and dense holes, allowing a large amount of high-temperature airflow to escape. During this process, the safety rod 35 provides first-level pressure resistance, allowing sufficient time to close the airflow channel and prevent high-temperature airflow or airflow carrying flames from entering the cooling assembly 32. The components in component 32 may cause damage, increasing the combustion and explosion area, or may carry high-temperature or flame-laden airflow back into the explosion-proof electrical box 2, causing secondary damage. The impact-resistant component 34, as a secondary impact-resistant protection, can release the impact force in multiple stages and step by step after the safety rod 35 fails, avoiding impact on the top layer of the outer cabinet 1 and reducing the damage to the outer cabinet 1. Thus, unlike temperature or pressure sensors, which are easily damaged by high temperatures at the moment of explosion due to the need for the sensors to be placed inside the explosion-proof electrical box 2, or cannot isolate the ventilation duct in time, the shock wave can easily damage the fan cooling equipment and cannot accurately distinguish between "slow temperature rise and small pressure difference" and "high-pressure shock wave at the moment of explosion", resulting in a delayed response, this solution can automatically release and cool down the small overpressure generated by normal temperature rise, and work with the cooling component 32 to circulate and cool down, balancing the pressure inside the explosion-proof electrical box 2. At the moment of explosion, the airflow is drawn out from the pressure relief groove 3113 and cooled down by fire extinguishing and cooling methods.

[0049] Furthermore, a fixed seat 3112 is provided on the outer wall of the pressure relief cylinder 311, and a spring 313 is sleeved on the outer side of the movable plug 312. One end of the spring 313 is connected to the fixed seat 3112, and the other end is connected to the second connecting frame 36, which plays the role of elastic reset. It can push the movable plug 312 back to its original position after the cooling component 32 cools down, and then re-seal it.

[0050] Furthermore, each movable plug 312 is provided with an iron block 3101 on its top;

[0051] The pressure relief unit 3 also includes a shrinkage assembly 38, and the bottom of the shrinkage assembly 38 is provided with an electromagnet 310 that corresponds to and cooperates with the iron block 3101.

[0052] The outer cabinet 1 is equipped with a carbon rod 3104, on which an induction generating element is installed. The second connecting frame 36 is connected to a follower seat 3102 via an extension frame. The follower seat 3102 is equipped with an induction receiving coil 3103 that works in conjunction with the induction generating element.

[0053] Furthermore, it also includes a central control system. It should be noted that the electricity used by the central control system and the pressure relief unit 3 is a separate circuit from the electricity used by the electrical control components inside the explosion-proof electrical box 2. This is to prevent the explosion inside the explosion-proof electrical box 2 from igniting the circuit and causing overall failure. The central control system is used to control the start and stop of the electromagnet 310 and the gas circulation pump 328. The electromagnet 310 is sensed by the induction receiving coil 3103, which transmits the signal to the central control system. Then, the central control system controls the electromagnet 310 and the gas circulation pump 328 to start and stop simultaneously for a specified time. The working time is set to 1-5 minutes.

[0054] Specifically, when the interior of the explosion-proof electrical box 2 heats up due to the normal operation of the electrical control components, the movable plug 312 is lifted. The movable plug 312 drives the second connecting frame 36 on it to rise. The second connecting frame 36 drives the follower seat 3102 to rise together through the extension frame. After the induction receiving coil 3103 on the follower seat 3102 rises to a certain height (that is, the air outlet and the connecting pipe 314 are fully open), it senses the signal emitted by the induction generating element and transmits the signal to the central control system. The central control system then controls the electromagnet 310 and the gas circulation pump 328 to start for 1-5 minutes and then shut down. The electromagnet 310 can attract the iron block 3101, preventing the movable plug 312 from moving up and down under the action of the airflow, ensuring that the air outlet is always open. The opening of the gas circulation pump 328 can promote the airflow inside the explosion-proof electrical box 2 to enter the cooling component 32 and circulate back to the explosion-proof electrical box 2.

[0055] Furthermore, the cooling assembly 32 includes:

[0056] Multiple circulating air pipes 321 are provided, and each circulating air pipe 321 is respectively installed on an air outlet and connected by a flange. The end of each circulating air pipe 321 away from the air outlet is connected to the explosion-proof electrical box 2 and is arranged near the bottom. Each circulating air pipe 321 is provided with a solenoid valve 322, a gas circulation pump 328 and a one-way air flow valve 329 in sequence in the direction from the air outlet to the explosion-proof electrical box 2. The solenoid valve 322 is used to control the opening and closing of the circulating air pipe 321. The gas circulation pump 328 is used to circulate the gas from the explosion-proof electrical box 2 and return it to the explosion-proof electrical box 2. The gas circulation pump 328 is connected to the inside of the outer cabinet 1 through the support 3291 and is used to control the airflow to move only from the air outlet to the direction from the air outlet to the explosion-proof electrical box 2.

[0057] The condenser 327 is located in the gap between the outer cabinet 1 and the explosion-proof electrical box 2, and is arranged on the outside of the multiple circulating air pipes 321.

[0058] Specifically, the increased internal temperature of the explosion-proof electrical box 2 leads to an increase in air pressure, which lifts the movable plug 312 and opens the airflow port. At this time, the central control system controls the electromagnet 310 to attract the iron block 3101 so that the movable plug 312 is no longer affected by the airflow. It also controls the gas circulation pump 328 to start, drawing the airflow from inside the explosion-proof electrical box 2 through the circulation pipe 321. At this time, the external condenser 327 performs heat exchange and cooling, allowing the cooled airflow to flow back into the interior of the explosion-proof electrical box 2, completing the heat dissipation and cooling, and reducing the risk of combustion and explosion.

[0059] Furthermore, the shrinkage component 38 includes:

[0060] The sliding rod 381 is slidably disposed inside the hollow base 37, and a base 382 is disposed at the bottom of the sliding rod 381, and the electromagnet 310 is disposed at the bottom of the base 382;

[0061] Support plate 383 is mounted on base 382, ​​and lifting frame 39 for lifting support plate 383 is fixedly connected to second connecting frame 36.

[0062] Specifically, during normal cooling and temperature reduction, the electromagnet 310 can attract the iron block 3101 and does not rise. However, during the combustion and explosion process, due to the large rising height of the movable plug 312, the support plate 383 will be lifted by the lifting frame 39, which will also drive the base 382 and the electromagnet 310 to rise, thus avoiding damage caused by strong impact.

[0063] Furthermore, the impact-resistant component 34 includes:

[0064] Steel bar 341 is fixedly connected to the second connecting frame 36. It should be noted that the top surface of steel bar 341 is rounded.

[0065] Sleeve 342 is connected to the bottom surface of hollow seat 37 via mounting block 344;

[0066] Several impact-resistant blocks 343 are provided. It should be noted that the impact-resistant blocks 343 are preferably replaceable consumable parts that can be replaced. They are fixedly arranged layer by layer on the inner wall of the sleeve 342, above the steel rod 341.

[0067] Specifically, when the bumper 35 breaks, the steel rod 341 rises and inserts into the impact-resistant block 343 layer by layer. After the bottom impact-resistant block 343 is destroyed, the upper layer continues to add resistance, thereby reducing the damage caused by the instantaneous impact.

[0068] Furthermore, the solenoid valve 322 is provided with a slide rail 323, and a conductive copper rod 324 is provided on the inner side of the slide rail 323. The second connecting frame 36 is connected to the sliding seat 325 through the first connecting frame 326. A conductive switch is provided on the inner side of the sliding seat 325 to cooperate with the conductive copper rod 324. When the safety rod 35 is deformed and broken, the conductive switch inside the sliding seat 325 contacts the sleeve 342 to form a circuit and control the solenoid valve 322 to close. It should be noted that the moment the conductive switch is energized with the sleeve 342, it will directly interfere with the closing of the electromagnet 310 and the gas circulation pump 328 through the central control system.

[0069] Furthermore, a buffer chamber 33 is fixedly installed on the pressure relief cylinder 311 and covers the outside of the pressure relief groove 3113 to form a buffer airflow cavity. The airflow is blocked and concentrated together for centralized fire extinguishing and pressure relief. Several connection ports 3111 are opened on the pressure relief cylinder 311. It should be noted that the control cabinet is installed in the machine room, and pressure relief pipes are arranged inside the machine room to release the airflow with flames to a safe location outside the machine room. The pressure relief pipes are connected to the connection ports 3111 to prevent the surrounding control cabinets from igniting and exploding together.

[0070] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. An explosion-proof high-voltage electrical control cabinet, comprising an outer cabinet (1), wherein an explosion-proof electrical box (2) is adapted to be installed inside the outer cabinet (1), characterized in that: The outer cabinet (1) is also equipped with a pressure relief unit (3) installed above the explosion-proof electrical box (2), wherein the pressure relief unit (3) includes: An automatic pressure relief assembly (31) is adapted to be installed on the top of the explosion-proof electrical box (2). The automatic pressure relief assembly (31) includes several pressure relief cylinders (311) that are connected to the top of the explosion-proof electrical box (2). Each pressure relief cylinder (311) has a movable plug (312) slidably disposed inside. The gap between the pressure relief cylinder (311) and the movable plug (312) is sealed. The pressure relief cylinder (311) is provided with a connecting port and a pressure relief groove (3113). The pressure relief groove (3113) is located above the connecting port. The connecting ports are connected by a connecting pipe (314). Some of the pressure relief cylinders (311) are also provided with an airflow port at the same height as the connecting pipe (314). A cooling assembly (32) is provided on the back side of the explosion-proof electrical box (2). The cooling assembly (32) is used to cool the gas leaking from the gas outlet and re-supply it to the interior of the explosion-proof electrical box (2). The safety bar (35) is fixedly connected to the inner wall of the outer cabinet (1) via the bar seat (351), and the movable plug (312) is provided with a movable groove (3121). The safety bar (35) is inserted into the inner side of multiple movable grooves (3121) to play a first-level impact resistance role. The second connecting frame (36) and the hollow seat (37) are fixedly installed on multiple movable plugs (312), and the hollow seat (37) is fixedly installed on the inner top of the outer cabinet (1). An anti-impact component (34) capable of reducing the explosive impact force is installed between the second connecting frame (36) and the hollow seat (37), which plays a secondary anti-impact role.

2. The explosion-proof electrical high-voltage control cabinet according to claim 1, characterized in that, A fixed seat (3112) is provided on the outer wall of the pressure relief cylinder (311), and a spring (313) is sleeved on the outer side of the movable plug (312). One end of the spring (313) is connected to the fixed seat (3112), and the other end is connected to the second connecting frame (36).

3. The explosion-proof electrical high-voltage control cabinet according to claim 2, characterized in that, Each of the movable plugs (312) is provided with an iron block (3101) on its top. The pressure relief unit (3) also includes a shrinking component (38), and the bottom of the shrinking component (38) is provided with an electromagnet (310) that corresponds to and cooperates with the iron block (3101). The outer cabinet (1) is equipped with a carbon rod (3104), and an induction generating element is provided on the carbon rod (3104). The second connecting frame (36) is connected to a follower seat (3102) through an extension frame. An induction receiving coil (3103) is provided on the follower seat (3102) to cooperate with the induction generating element.

4. The explosion-proof electrical high-voltage control cabinet according to claim 3, characterized in that, It also includes a central control system, which is used to control the start and stop of the electromagnet (310) and the gas circulation pump (328). The electromagnet (3103) senses the electromagnet generating element and transmits the signal to the central control system. Then, the electromagnet (310) and the gas circulation pump (328) are controlled by the central control system to start and stop at a specified time.

5. The explosion-proof electrical high-voltage control cabinet according to claim 1, characterized in that, The cooling assembly (32) includes: Multiple circulating air pipes (321) are provided, and each circulating air pipe (321) is respectively provided on an air outlet. Each circulating air pipe (321) is connected to the explosion-proof electrical box (2) at the end away from the air outlet. Each circulating air pipe (321) is provided with a solenoid valve (322), a gas circulation pump (328) and a one-way airflow valve (329) in sequence in the direction extending from the air outlet to the explosion-proof electrical box (2). The solenoid valve (322) is used to control the opening and closing of the circulating air pipe (321). The gas circulation pump (328) is used to circulate the gas from the explosion-proof electrical box (2) and return it to the explosion-proof electrical box (2). The gas circulation pump (328) is connected to the inside of the outer cabinet (1) through the support (3291) and is used to control the airflow to only move from the air outlet to the direction extending from the explosion-proof electrical box (2). The condenser (327) is located in the gap between the outer cabinet (1) and the explosion-proof electrical box (2) and is arranged on the outside of the multiple circulating gas pipes (321).

6. The explosion-proof electrical high-voltage control cabinet according to claim 3, characterized in that, The shrinkage assembly (38) includes: A sliding rod (381) is slidably disposed inside a hollow base (37), and a base (382) is disposed at the bottom of the sliding rod (381), and the electromagnet (310) is disposed at the bottom of the base (382); A support plate (383) is mounted on a base (382), and a lifting frame (39) for lifting the support plate (383) is fixedly connected to the second connecting frame (36).

7. The explosion-proof electrical high-voltage control cabinet according to claim 1, characterized in that, The impact-resistant component (34) includes: The steel rod (341) is fixedly connected to the second connecting frame (36); The sleeve (342) is connected to the bottom surface of the hollow seat (37) via the mounting block (344); Several impact-resistant blocks (343) are provided and are fixedly arranged layer by layer on the inner wall of the sleeve (342), located above the steel rod (341).

8. The explosion-proof electrical high-voltage control cabinet according to claim 5, characterized in that, The solenoid valve (322) is provided with a slide rail (323), and a conductive copper rod (324) is provided on the inner side of the slide rail (323). The second connecting frame (36) is connected to a sliding seat (325) through the first connecting frame (326). A conductive switch that works with the conductive copper rod (324) is provided on the inner side of the sliding seat (325).

9. The explosion-proof electrical high-voltage control cabinet according to claim 1, characterized in that, A buffer chamber (33) is fixedly installed on the pressure relief cylinder (311) and covers the outside of the pressure relief groove (3113). Several connection ports (3111) are opened on the pressure relief cylinder (311).

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