Explosion-proof power distribution cabinet

Abstract

The invention discloses an explosion-proof power distribution cabinet, and relates to the technical field of power distribution cabinets, the explosion-proof power distribution cabinet comprises a cabinet body, the outer surface of the cabinet body is provided with heat dissipation holes, the cabinet body is provided with a one-way valve, the interior of the cabinet body is provided with a chute, the interior of the chute is slidably connected with a sealing plate, the sealing plate is provided with a rectangular through hole, and the rectangular through hole is provided with a through hole. A heat insulation box is fixedly mounted at the bottom of the inner wall of the cabinet body, a carbon dioxide release mechanism is arranged on the heat insulation box, a heat insulation plate is slidably connected to the inner side of the heat insulation box, and a T-shaped rod is fixedly connected to the top of the heat insulation plate. The explosion-proof power distribution cabinet has the effect of effectively reducing explosion caused by sparks generated in the power distribution cabinet.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution cabinets, and in particular to an explosion-proof power distribution cabinet. Background Art

[0002] An explosion-proof distribution cabinet is a device specially designed to distribute electricity and control circuits in flammable and explosive environments. It is made of special structures and materials and can effectively prevent sparks and arcs generated by internal electrical faults from causing explosions of flammable and explosive substances in external hazardous environments.

[0003] The reason why the current explosion-proof distribution cabinet can achieve explosion-proof effect is mainly due to its unique design and material selection. The cabinet body of the explosion-proof distribution cabinet is mainly made of cold-rolled steel plate or stainless steel and aluminum alloy. The cabinet body made of these materials has excellent strength and hardness, which can effectively prevent the spark leakage caused by the explosion in the cabinet. However, although this explosion-proof distribution cabinet can isolate the explosion, it cannot prevent the explosion inside the distribution cabinet. During long-term use, when flying catkins or dust enters the cabinet and causes the line components to generate sparks and then burn, the rapidly rising temperature and pressure will prevent the heat from quickly dissipating from the heat dissipation holes, which is easy to cause an explosion inside the distribution cabinet, thereby causing partial or complete damage to the internal components. For this reason, we propose an explosion-proof distribution cabinet. Summary of the invention

[0004] The present application provides an explosion-proof power distribution cabinet, which has the effect of effectively reducing explosions caused by sparks generated inside the power distribution cabinet.

[0005] The present application provides an explosion-proof power distribution cabinet, which adopts the following technical solution: A kind of explosion-proof power distribution cabinet comprises a cabinet body, the outer surface of the cabinet body is provided with heat dissipation holes, the cabinet body is provided with a one-way valve, the interior of the cabinet body is provided with a slide groove, a closing plate is slidably connected in the slide groove, a rectangular through hole is provided on the closing plate, a heat insulation box is fixedly installed on the bottom of the inner wall of the cabinet body, a carbon dioxide release mechanism is provided on the heat insulation box, a heat insulation board is slidably connected to the inner side of the heat insulation box, a T-bar is fixedly connected to the top of the heat insulation board, and one end of the T-bar is fixedly connected to the outer surface of the closing plate, a fixed box is fixedly installed on the top of the inner wall of the cabinet body, a sand storage cylinder is fixedly connected to the outer surface of the fixed box, an arc-shaped opening is provided at the bottom of the sand storage cylinder, and a sand-moving fire-extinguishing mechanism for discharging fine sand in the sand storage cylinder is provided on the fixed box.

[0006] Through the above technical solution, the CO2 content in the explosion-proof distribution cabinet can be increased through the carbon dioxide release mechanism, and the sand extinguishing mechanism can directly extinguish the open flame by sprinkling fine sand, thereby preventing the open flame from continuing to burn or even causing an explosion.

[0007] Preferably, the carbon dioxide release mechanism comprises an air bag arranged inside the heat-insulating box, the outer surface of the air bag is fixedly connected to a connecting pipe, and the end of the connecting pipe away from the air bag is fixedly connected to a metal circulation pipe.

[0008] Through the above technical solution, the carbon dioxide stored in the air bag can be discharged by the carbon dioxide release mechanism and discharged into the interior of the cabinet through the connecting pipe and the metal circulation pipe.

[0009] Preferably, the sand-moving fire-extinguishing mechanism includes a toothed rod movably arranged at the bottom of the fixed box, and the bottom of the toothed rod is fixedly connected to the top of the T-bar, the inner wall of the fixed box is rotatably connected with a cylindrical gear, and the outer surface of the cylindrical gear is meshed with the outer surface of the toothed rod.

[0010] Through the above technical solution, the fine sand in the sand storage cylinder can be pushed down through the sand-pushing fire-extinguishing mechanism, thereby extinguishing the open fire.

[0011] Preferably, a rack rack is slidably connected to the inner side of the fixed box, and the outer surface of the rack rack is meshingly connected to the outer surface of the cylindrical gear. A push rod is fixedly connected to the outer surface of the rack rack, and the push rod is movably arranged with one end of the sand storage cylinder close to the fixed box.

[0012] Through the above technical solution, when the cylindrical gear drives the rack to slide along the inner side of the fixed box during its rotation, the push rod will be linked to move synchronously.

[0013] Preferably, one end of the push rod away from the rack frame is fixedly connected to a push plate, the push plate is designed as an arc-shaped plate, and the outer surface of the push plate is slidably connected to the inner wall of the sand storage cylinder.

[0014] Through the above technical solution, the design of the arc-shaped push plate can push the fine sand on the one hand and allow the air flow to flow smoothly on the other hand. In principle, the amount of fine sand should be lower than the distance at one end of the top of the push plate.

[0015] Preferably, a retaining block is fixedly sleeved on the outer surface of the push rod, and a driving clamp shaft is fixedly connected to the top of the retaining block.

[0016] Through the above technical solution, the connection relationship between the drive clamp shaft and the curved groove on the surface of the cylindrical wheel is essentially a kinematic fit. The curved groove and the cylindrical wheel transmit motion and power through contact. The drive clamp shaft usually has a profile that matches the curved groove to ensure close contact and effective transmission between the two.

[0017] Preferably, a fixing frame is fixedly connected to the top of the inner wall of the fixed box, a rotating shaft is rotatably connected to the bottom of the fixing frame, and the rotating shaft is movably inserted into the inner side of the pushing plate, a cylindrical wheel is fixedly sleeved on the outer surface of the rotating shaft, and a curved groove is opened on the outer surface of the cylindrical wheel.

[0018] Through the above technical solution, when the drive clamp shaft moves along the curved groove, force will be applied to the cylindrical wheel, thereby converting the linear motion of the drive clamp shaft into the rotation of the cylindrical wheel. During this process, the cylindrical wheel drives the rotating shaft to rotate synchronously.

[0019] Preferably, a material-shifting blade is fixedly connected to the outer surface of the rotating shaft, and the material-shifting blade is located in the sand storage cylinder near the arc-shaped opening.

[0020] Through the above technical solution, the material-moving blades are arranged in the sand storage barrel near the arc-shaped opening, so that when the fine sand is sprinkled through the arc-shaped opening, the material-moving blades in the rotating process can have the effect of moving part of the fine sand, causing it to swing out and increase the sprinkling range.

[0021] In summary, this application has the following beneficial effects: 1. The explosion-proof power distribution cabinet integrates multiple functions such as automatic closing of heat dissipation holes, one-way heat dissipation and pressure relief, automatic CO2 injection and automatic fine sand fire extinguishing. These functions work together to form an efficient fire protection system that can respond quickly at the early stage of a fire, effectively extinguish open flames and prevent the spread of fire, thereby greatly improving the safety of the power distribution cabinet and its internal components.

[0022] 2. When a fire occurs inside the distribution cabinet, the high temperature and high pressure environment will quickly push the insulation board down, linking the closing plate to close the heat dissipation holes, and at the same time open the one-way valve to dissipate heat and pressure. This process not only releases the pressure inside the cabinet, but also reduces the oxygen content. The whole process is carried out automatically without human intervention, which greatly improves the response speed and reliability of the distribution cabinet in the event of a fire.

[0023] 3. The distribution cabinet is equipped with a fine sand fire extinguishing mechanism. When a fire occurs, fine sand will be automatically pushed out of the sand storage tube and spread, covering the burning components to achieve physical isolation and fire extinguishing. This mechanism not only has a significant fire extinguishing effect, but also will not cause major secondary damage to the inside of the distribution cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the cabinet in the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the cabinet in the present invention; Figure 4 It is a schematic diagram of the closed plate structure in the present invention; Figure 5 It is a schematic diagram of the internal structure of the fixed box in the present invention; Figure 6 It is a schematic diagram of the rack structure of the present invention; Figure 7 It is a schematic diagram of the internal structure of the sand storage cylinder in the present invention.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. Cabinet; 2. Heat dissipation hole; 3. One-way valve; 4. Slide; 5. Closing plate; 6. Rectangular through hole; 7. Heat insulation box; 8. Air bag; 9. Connecting pipe; 10. Metal circulation pipe; 11. Heat insulation board; 12. T-bar; 13. Fixed box; 14. Sand storage cylinder; 15. Arc opening; 16. Toothed rod; 17. Cylindrical gear; 18. Rack rack; 19. Push rod; 20. Pushing plate; 21. Retaining block; 22. Driving clamp shaft; 23. Fixed frame; 24. Rotating shaft; 25. Cylindrical wheel; 26. Curved groove; 27. Material dispensing blade. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0027] The present invention discloses an explosion-proof power distribution cabinet, such as Figure 1 As shown, the cabinet 1 includes a cabinet body 1, the outer surface of the cabinet body 1 is provided with a heat dissipation hole 2, the cabinet body 1 is provided with a one-way valve 3, the airflow direction of the one-way valve 3 is from the cabinet body 1 to the outside, and the one-way valve 3 is made of stainless steel, which has the characteristics of high temperature resistance and corrosion resistance, and the cabinet body 1 is provided with a slide groove 4, the slide groove 4 is slidably connected with a closing plate 5, and the closing plate 5 is provided with a rectangular through hole 6. In a normal state (such as Figure 3 As shown in the figure, the closing plate 5 located in the slide groove 4 has a closing effect on the one-way valve 3, and the airflow inside and outside the cabinet 1 forms a passage through the heat dissipation hole 2 and the rectangular through hole 6, and can perform natural convection normally. A heat insulation box 7 is fixedly installed at the bottom of the inner wall of the cabinet 1, and a carbon dioxide release mechanism is arranged on the heat insulation box 7. An insulation board 11 is slidably connected to the inner side of the heat insulation box 7, and a T-shaped rod 12 is fixedly connected to the top of the insulation board 11, and one end of the T-shaped rod 12 is fixedly connected to the outer surface of the closing plate 5. A fixed box 13 is fixedly installed on the top of the inner wall of the cabinet 1, and the outer surface of the fixed box 13 is fixedly connected to the outer surface of the closing plate 5. The surface is fixedly connected with a sand storage cylinder 14, and a plurality of groups of holes are provided on the outer surface of the fixed box 13, so that the fixed box 13 and the sand storage cylinder 14 are always in a connected state. The sand storage cylinder 14 is provided with an opening plug for adding fine sand, and the opening plug can be pulled out when adding. The bottom of the sand storage cylinder 14 is provided with an arc-shaped opening 15, and the arc-shaped transition design is provided at the arc-shaped opening 15, so that the sucked sand is pushed out smoothly under the push of the pushing plate 20 and the tossing action of the tossing blade 27. The fixed box 13 is provided with a sand-moving fire-extinguishing mechanism for discharging the fine sand in the sand storage cylinder 14, see Figure 2, you can understand the overall picture of the carbon dioxide release mechanism and the sand-moving fire extinguishing mechanism, Figure 3 This is a diagram showing the interior of the carbon dioxide release mechanism and the sand-moving fire-extinguishing mechanism.

[0028] See also Figure 1-4 Through the above technical solution, when the explosion-proof power distribution cabinet is in use, when there is flying catkins or dust from the outside entering the cabinet body 1 through the heat dissipation holes 2, causing the component circuit to generate sparks and then gradually burn, you can refer to Figure 3 The rapidly rising temperature and pressure in the cabinet 1 will prevent the heat from being quickly and effectively dissipated from the heat dissipation holes 2. Therefore, the high temperature and high pressure environment in the cabinet 1 will cause the gas in the cabinet 1 to expand rapidly, thereby easily pushing the insulation board 11 to slide down along the insulation box 7, and at the same time linking the T-bar 12 to move down, changing the position of the closing plate 5 in the slide groove 4. During this process, the hot air flow in the cabinet 1 will be discharged through the one-way valve 3 (rapidly improving the exhaust efficiency). At the same time, the insulation board 11 and the T-bar 12 will synchronously trigger the carbon dioxide release mechanism and the material extinguishing mechanism to replenish carbon dioxide in the cabinet 1 (reducing the oxygen content inside the cabinet 1), and extinguish the open flame with fine sand, thereby effectively preventing the continued burning of the open flame and reducing the risk of explosion inside the explosion-proof distribution cabinet.

[0029] Specifically, the carbon dioxide release mechanism includes an airbag 8 arranged inside the heat-insulating box 7 , the outer surface of the airbag 8 is fixedly connected to a connecting pipe 9 , and one end of the connecting pipe 9 away from the airbag 8 is fixedly connected to a metal circulation pipe 10 .

[0030] See also Figure 3 Through the above technical solution, there is a valve port on the airbag 8 for injecting gas (the gas injected here is CO2), and the other end opening of the metal circulation pipe 10 is set near the bottom of the cabinet 1. This design is to allow the CO2 in the airbag 8 to be injected into the cabinet 1 from the bottom, so that under high temperature and high pressure, the airflow originally existing in the cabinet 1 is preferentially discharged (here it is mainly to reduce the O2 content originally existing in the cabinet 1).

[0031] Specifically, the sand-moving fire extinguishing mechanism includes a toothed rod 16 movably arranged at the bottom of the fixed box 13, and the bottom of the toothed rod 16 is fixedly connected to the top of the T-bar 12, and the inner wall of the fixed box 13 is rotatably connected with a cylindrical gear 17, and the outer surface of the cylindrical gear 17 is meshed with the outer surface of the toothed rod 16.

[0032] See also Figure 5 , Figure 6 and Figure 7The three together constitute a complete sand-moving fire-extinguishing mechanism. When the toothed rod 16 moves downward synchronously with the T-bar 12, it will drive the cylindrical gear 17 meshing therewith to make the cylindrical gear 17 rotate. During this process, since the air pressure between the fixed box 13 and the sand storage cylinder 14 is in a relatively balanced state (under high pressure), the push plate 20 will not be pushed by the air pressure.

[0033] Specifically, a rack rack 18 is slidably connected to the inner side of the fixed box 13, and the outer surface of the rack rack 18 is meshed with the outer surface of the cylindrical gear 17. A push rod 19 is fixedly connected to the outer surface of the rack rack 18, and the push rod 19 is movably arranged with one end of the sand storage cylinder 14 close to the fixed box 13.

[0034] Through the above technical solution, during the self-rotation process of the cylindrical gear 17, it will transmit the transmission to the rack rack 18 meshing with it below, so as to push the rack rack 18 forward. During this process, the rack rack 18 slides forward along the two grooves at the bottom of the fixed box 13, which also plays a relative limiting role for the rack rack 18, so that it moves forward along a fixed trajectory.

[0035] Specifically, one end of the push rod 19 away from the rack frame 18 is fixedly connected with a push plate 20 . The push plate 20 is designed as an arc-shaped plate, and the outer surface of the push plate 20 is slidably connected to the inner wall of the sand storage cylinder 14 .

[0036] Through the above technical solution, when the push plate 20 moves synchronously with the push rod 19, it has no influence on the rotating shaft 24 passing through it, and the rotation of the rotating shaft 24 and the forward pushing of the push plate 20 can be carried out synchronously.

[0037] Specifically, a retaining block 21 is fixedly sleeved on the outer surface of the push rod 19 , and a driving clamping shaft 22 is fixedly connected to the top of the retaining block 21 .

[0038] Through the above technical solution, when the push rod 19 is pushed forward, the retaining block 21 and the driving clamp shaft 22 will be linked to move forward synchronously. In this process, since the connection relationship between the driving clamp shaft 22 and the curved groove 26 is based on a specific kinematic coordination, when the push rod 19 moves forward, the driving clamp shaft 22 moves along the trajectory of the curved groove 26. This coordination relationship ensures that the cylindrical wheel 25 can rotate according to a predetermined motion law.

[0039] Specifically, a fixing frame 23 is fixedly connected to the top of the inner wall of the fixed box 13, and a rotating shaft 24 is rotatably connected to the bottom of the fixing frame 23. The rotating shaft 24 is movably inserted into the inner side of the pushing plate 20, and a cylindrical wheel 25 is fixedly sleeved on the outer surface of the rotating shaft 24, and a curved groove 26 is opened on the outer surface of the cylindrical wheel 25.

[0040] Through the above technical solution, after the movement coordination of the driving clamp shaft 22 and the curved groove 26 on the cylindrical wheel 25 , the rotating shaft 24 will be linked to rotate synchronously with the cylindrical wheel 25 .

[0041] Specifically, a material-shifting blade 27 is fixedly connected to the outer surface of the rotating shaft 24 , and the material-shifting blade 27 is located in the sand storage cylinder 14 near the arc-shaped opening 15 .

[0042] Through the above technical solution, the opening plug on the sand storage barrel 14 is set on the right side of the pushing disc 20. When a proper amount of material (fine sand) is injected, the fine sand is stored in the area between the pushing disc 20 and the arc-shaped opening 15 in the sand storage barrel 14. When the pushing disc 20 pushes the sucked sand out of the arc-shaped opening 15, the material-discharging blade 27 will rotate synchronously therewith, so that a part of the sucked sand is directly pushed out and falls, while the other part is thrown out.

[0043] Working principle: During normal use, the explosion-proof power distribution cabinet can dissipate heat through normal natural convection through the heat dissipation holes 2 and the rectangular through holes 6.

[0044] When flying catkins or dust from the outside enters the cabinet 1 and causes sparks in the circuit of the components and then gradually burns, the rapidly rising temperature and pressure in the cabinet 1 will prevent the heat from being quickly and effectively dissipated from the heat dissipation holes 2. At this time, the high temperature and high pressure environment in the cabinet 1 will cause the gas in the cabinet 1 to expand rapidly, thereby easily pushing the insulation board 11 to slide down along the insulation box 7. During this process, the insulation board 11 will drive the T-bar 12 to move down synchronously while moving down, thereby linking the closing plate 5 to slide down along the slide groove 4. During this period, the rectangular through hole 6 on the closing plate 5 will move down from the heat dissipation hole 2 to the Gradually facing the position of the one-way valve 3, so that the airflow can be directly dispersed through the one-way valve 3, which has the effect of heat dissipation and pressure relief. When the rectangular through hole 6 is completely facing the one-way valve 3, the heat dissipation hole 2 will be blocked by other parts of the closing plate 5, thereby closing the heat dissipation hole 2, so that the airflow in the cabinet 1 can only flow through the one-way valve 3, preventing the external oxygen from continuing to enter the cabinet. The one-way airflow direction of the one-way valve 3 (flowing from the inside of the cabinet 1 to the outside) will cause the airflow in the cabinet 1 to quickly leak out through the one-way valve 3 (both releasing the pressure in the cabinet and reducing the oxygen content).

[0045] During this period, the pressure and heat in the distribution cabinet will gradually decrease, and the external airflow will not be able to enter the distribution cabinet, thereby effectively discharging the original airflow in the cabinet 1 (mainly discharging O2 here). At the same time, in the process of the heat insulation board 11 moving down to squeeze the airbag 8, the airbag 8 will be deformed after being compressed, and its volume will gradually decrease. The CO2 stored inside will be input into the metal circulation pipe 10 through the connecting pipe 9, and finally discharged into the cabinet 1 through the bottom outlet of the metal circulation pipe 10, thereby increasing the CO2 content in the cabinet 1. This increase and decrease (exhaust consumption of O2 and increase of CO2) can reduce the combustible conditions inside the distribution cabinet to a minimum, effectively suppressing the continuation of combustion.

[0046] The T-bar 12 will also synchronously drive the toothed rod 16 to move downward during the downward movement. The toothed rod 16 will mesh with the cylindrical gear 17 to drive the cylindrical gear 17 to rotate, and finally drive the rack 18 meshed with the cylindrical gear 17 to move forward. During this period, the rack 18 will drive the push plate 20 to slide forward in the sand storage barrel 14 by pushing the push rod 19, so that the fine sand stored in the sand storage barrel 14 is gradually pushed out from the arc opening 15.

[0047] At the same time, as the retaining block 21 is synchronously pushed along with the push rod 19, the kinematic coordination between the driving clamp shaft 22 and the curved groove 26 allows the driving clamp shaft 22 to move along the trajectory of the curved groove 26, which in turn causes the cylindrical wheel 25 to rotate and drives the rotating shaft 24 to rotate synchronously, ultimately allowing the material-moving blade 27 to move the fine sand during rotation, so that a portion of the fine sand is thrown out when passing through the arc-shaped opening 15, effectively increasing the flying range of the fine sand, that is, the open flame generated by the component circuit is extinguished by the fine sand, and ultimately preventing the explosion caused by external flying catkins and dust entering the distribution cabinet.

[0048] In summary, the explosion-proof distribution cabinet realizes multiple functions such as automatic closing of heat dissipation holes 2, one-way heat dissipation and pressure relief, automatic CO2 injection and automatic fire extinguishing by fine sand in the event of fire. These functions not only effectively reduce the combustible conditions inside the distribution cabinet, but also can quickly extinguish open flames at the early stage of fire and prevent the fire from spreading, thereby protecting the safety of the distribution cabinet and its internal components.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof power distribution cabinet, comprising a cabinet body (1), characterized in that: The outer surface of the cabinet (1) is provided with a heat dissipation hole (2), the cabinet (1) is provided with a one-way valve (3), the interior of the cabinet (1) is provided with a slide groove (4), a closing plate (5) is slidably connected to the inside of the slide groove (4), a rectangular through hole (6) is provided on the closing plate (5), a heat insulation box (7) is fixedly installed on the bottom of the inner wall of the cabinet (1), a carbon dioxide release mechanism is provided on the heat insulation box (7), and the inner side of the heat insulation box (7) is slidably connected to the heat insulation board (1 1), a T-shaped rod (12) is fixedly connected to the top of the heat insulation board (11), and one end of the T-shaped rod (12) is fixedly connected to the outer surface of the closing plate (5), a fixed box (13) is fixedly installed on the top of the inner wall of the cabinet (1), a sand storage cylinder (14) is fixedly connected to the outer surface of the fixed box (13), an arc-shaped opening (15) is opened at the bottom of the sand storage cylinder (14), and a sand-moving fire-extinguishing mechanism for discharging fine sand in the sand storage cylinder (14) is provided on the fixed box (13).

2. The explosion-proof power distribution cabinet according to claim 1, characterized in that: The carbon dioxide release mechanism comprises an air bag (8) arranged inside the heat-insulating box (7), the outer surface of the air bag (8) is fixedly connected to a connecting pipe (9), and one end of the connecting pipe (9) away from the air bag (8) is fixedly connected to a metal circulation pipe (10).

3. The explosion-proof power distribution cabinet according to claim 1, characterized in that: The sand-moving fire-extinguishing mechanism comprises a toothed rod (16) movably arranged on the bottom of a fixed box (13), wherein the bottom of the toothed rod (16) is fixedly connected to the top of the T-shaped rod (12), and the inner wall of the fixed box (13) is rotatably connected to a cylindrical gear (17), and the outer surface of the cylindrical gear (17) is meshingly connected to the outer surface of the toothed rod (16).

4. The explosion-proof power distribution cabinet according to claim 3, characterized in that: A rack rack (18) is slidably connected to the inner side of the fixed box (13), and the outer surface of the rack rack (18) is meshingly connected to the outer surface of the cylindrical gear (17). A push rod (19) is fixedly connected to the outer surface of the rack rack (18), and the push rod (19) is movably connected to one end of the sand storage cylinder (14) close to the fixed box (13).

5. The explosion-proof power distribution cabinet according to claim 4, characterized in that: A push plate (20) is fixedly connected to one end of the push rod (19) away from the rack frame (18); the push plate (20) is designed as an arc-shaped plate, and the outer surface of the push plate (20) is slidably connected to the inner wall of the sand storage cylinder (14).

6. The explosion-proof power distribution cabinet according to claim 4, characterized in that: A retaining block (21) is fixedly sleeved on the outer surface of the push rod (19), and a driving clamping shaft (22) is fixedly connected to the top of the retaining block (21).

7. The explosion-proof power distribution cabinet according to claim 5, characterized in that: A fixing frame (23) is fixedly connected to the top of the inner wall of the fixing box (13), a rotating shaft (24) is rotatably connected to the bottom of the fixing frame (23), and the rotating shaft (24) is movably inserted into the inner side of the pushing plate (20), a cylindrical wheel (25) is fixedly sleeved on the outer surface of the rotating shaft (24), and a curved groove (26) is formed on the outer surface of the cylindrical wheel (25).

8. The explosion-proof power distribution cabinet according to claim 7, characterized in that: A material shifting blade (27) is fixedly connected to the outer surface of the rotating shaft (24), and the material shifting blade (27) is located in the sand storage cylinder (14) near the arc-shaped opening (15).

Images