Buried electrical cabinet for new energy automobile charging pile

Abstract

The invention relates to the technical field of buried equipment, in particular to a buried electrical cabinet for a new energy automobile charging pile, which comprises an electrical box and a box cover, a charging cabinet is mounted at the top end of the box cover, a dehumidification plate is mounted on the inner wall of the electrical box, a shell is mounted at the bottom end of the box cover, and an air inlet shell is communicated with the bottom end of the dehumidification plate. A water cooling box is installed at the bottom end of the electrical box, a water conveying pipe communicating with the water cooling box is arranged in the electrical box, the outer side of the water conveying pipe communicates with a water cooling pipe, a rotating shaft is rotationally arranged in the water cooling pipe, and blades are installed on the outer wall of the rotating shaft. The silica gel particles can quickly adsorb water vapor into the silica gel particles, so that the water vapor in the electrical box is transferred into the dehumidification plate, dehumidification of the internal environment of the electrical box is realized, the air humidity in the electrical box can be effectively reduced, and adverse effects of the high-humidity environment on electrical components in the electrical box are avoided.

Description

Technical Field

[0001] This invention relates to the field of underground equipment technology, and in particular to an underground electrical cabinet for new energy vehicle charging piles. Background Technology

[0002] As the core infrastructure of the new energy vehicle energy replenishment system, the layout and performance of charging piles directly affect the user experience and the development of the industry. At present, charging piles are mainly divided into two types of installation: floor-mounted and wall-mounted. However, against the backdrop of increasingly tight urban land, underground electrical cabinets are gradually becoming an important development direction for charging pile supporting equipment due to their advantages such as saving ground space, reducing the risk of external collision damage, and improving the aesthetics of the site.

[0003] However, since underground electrical cabinets are buried below ground, the underground environment is relatively closed all year round. Moisture in the soil can easily seep through the gaps in the cabinet or condense due to temperature differences, resulting in high humidity inside the cabinet. Water droplets formed on the inner wall of the cabinet and the surface of electrical components can accelerate the corrosion of metal parts, reduce the insulation performance of insulation materials, and in severe cases may cause short circuit faults, shortening the service life of electrical equipment.

[0004] In view of this, we have studied and improved upon the existing problems to provide an underground electrical cabinet for new energy vehicle charging piles. The aim of this technology is to solve the problems and improve its practical value. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and propose an underground electrical cabinet for new energy vehicle charging piles.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an underground electrical cabinet for charging piles of new energy vehicles, comprising an electrical box and a box cover, wherein a charging cabinet is installed on the top of the box cover, a dehumidifying plate is installed on the inner wall of the electrical box, a shell is installed on the bottom of the box cover, and an air inlet shell is connected to the bottom of the dehumidifying plate. A water-cooled box is installed at the bottom of the electrical box. A water supply pipe connected to the water-cooled box is provided inside the electrical box. A water-cooled pipe is connected to the outside of the water supply pipe. A rotating shaft is installed inside the water-cooled pipe. Blades are installed on the outer wall of the rotating shaft. A fan is sleeved at one end of the water-cooled pipe that extends through to the air inlet shell. A horizontal pipe is installed below the box cover, and a vertical pipe connects the water supply pipe to the horizontal pipe. A ball valve is rotatably installed inside the vertical pipe. A baffle is hinged inside the housing, an air outlet shell is installed on the side wall of the housing, a rotating plate is rotatably installed inside the air outlet shell, a dry powder cylinder is installed below the box cover, two sets of symmetrical blocking plates slide at the bottom of the dry powder cylinder, and a drive assembly is provided on the side wall of the air outlet shell to push the two sets of blocking plates to move. A sleeve is installed below the box cover. Two sets of push rods slide inside the sleeve. A rack A is installed at one end of the push rod. A gear is sleeved at one end of the baffle. A connecting pipe is connected to the side wall of the sleeve. A slide rod slides on the inner wall of the connecting pipe. A rack B is installed at the bottom end of the slide rod. Spring A and spring B are respectively sleeved on the outer walls of the push rod and the slide rod.

[0007] Preferably, the dehumidifier plate has through holes on both sides, and the interior of the dehumidifier plate contains silica gel particles.

[0008] Preferably, an exhaust pipe is connected to the top of the housing, the dehumidification plate is connected to the housing through a connecting pipe, and a filter plate is installed at one end of the housing.

[0009] Preferably, water spray pipes are connected to both sides of the horizontal pipe, and a nozzle is connected to the bottom of the water spray pipes.

[0010] Preferably, two sets of symmetrical fixing frames are installed on both sides of the dry powder cylinder, and a limiting rod is installed between the two sets of fixing frames. The two ends of the blocking plate slide on the outer wall of the limiting rod, and a spring C is sleeved on the outer wall of the limiting rod.

[0011] Preferably, the drive assembly includes a rotating rod that rotates on the side wall of the dry powder cylinder, a cam is sleeved on the outer wall of the rotating rod, and rotating wheels are sleeved at both ends of the rotating rod and the rotating plate, and the two sets of rotating wheels are rotatably connected by a pull belt.

[0012] Preferably, the ball valve has a valve stem installed on its outer wall, the valve stem has teeth on its outer wall, the rack B is connected to the valve stem by meshing with the teeth, and the rack A is connected to a gear.

[0013] Preferably, the spring constant of spring A is less than that of spring B.

[0014] Preferably, both the sleeve and the limiting rod are filled with mercury.

[0015] Preferably, a moisture-proof pad is installed at the bottom of the electrical box. The moisture-proof pad is made of polyethylene foam material and is bonded and fixed to the bottom of the electrical box with waterproof adhesive.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention works by having the silica gel particles in contact with the moisture inside the electrical box. The silica gel particles quickly absorb the moisture inside themselves, thereby transferring the moisture inside the electrical box to the dehumidification plate. This effectively reduces the humidity inside the electrical box, preventing high humidity from adversely affecting the electrical components inside, and thus improving the service life and operational stability of the electrical equipment.

[0017] 2. This invention utilizes a circulating pump inside the water-cooled box to draw coolant into the water supply pipe. The coolant flows along the water supply pipe to the water-cooling pipes connected to both sides and circulates within them, thereby rapidly reducing the temperature inside the electrical box. This ensures that electrical components always operate in a suitable temperature environment, preventing performance degradation or malfunctions caused by high temperatures and guaranteeing the stable operation of the electrical cabinet. Simultaneously, when the coolant flows through the blades inside the water-cooling pipes, the impact force of the coolant drives the blades to rotate. The blades, through a rotating shaft, drive the fan inside the air inlet housing to rotate synchronously. The suction generated by the fan's rotation draws hot air from inside the electrical box into the air inlet housing. The hot air then enters the dehumidification plate through the air inlet housing's channel. At this point, the hot air, with a certain temperature, dries the silica gel particles inside the dehumidification plate that are saturated with moisture, restoring their moisture absorption capacity and thus regenerating the silica gel. This keeps the silica gel particles in a dry state, ensuring a long-term stable dehumidification effect.

[0018] 3. In this invention, when the mercury inside the sleeve expands due to heat, it initially overcomes the elastic force of spring B, pushing the slide rod and rack B downwards. This causes the ball valve to rotate via the valve stem, allowing coolant to be sprayed out from the nozzle through the vertical pipe, horizontal pipe, and water spray pipe. This sprays and cools the electrical components inside the electrical box, reducing the risk of further temperature increases and more serious problems, and greatly reducing the probability of a fire. If the cooling is ineffective and causes a fire, the mercury continues to expand, overcoming the elastic force of spring A, pushing the push rod and rack A to move. This movement causes the baffle to flip and block the air outlet via the gears, diverting the airflow to the air casing and causing the rotating plate to rotate. The rotating plate rotates the cam via a transmission, pushing the blocking plate to move. This causes the dry powder in the dry powder cylinder to fall intermittently onto the rotating plate, and then the airflow evenly sprays the dry powder onto the surface of the burning component to extinguish the fire. The airflow spraying method allows the dry powder to more accurately cover the burning area, especially the gaps and hidden parts of electrical components, ensuring the thoroughness of fire extinguishing, effectively curbing the spread of fire, quickly extinguishing the fire source, minimizing the damage to the internal components of the electrical box caused by the fire, and reducing the equipment maintenance costs caused by the fire. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the electrical box of the present invention; Figure 3 This is one of the partial structural schematic diagrams of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A; Figure 5 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of section B; Figure 7 This is a partial structural schematic diagram of the present invention; Figure 8 For the present invention Figure 5 Enlarged structural diagram of section C.

[0020] Legend: 1. Electrical box; 2. Box cover; 3. Charging cabinet; 4. Dehumidifier plate; 5. Through hole; 6. Water-cooled box; 7. Water supply pipe; 8. Water-cooled pipe; 9. Air inlet shell; 10. Rotating shaft; 11. Blade; 12. Fan; 13. Shell; 14. Exhaust pipe; 15. Horizontal pipe; 16. Water spray pipe; 17. Nozzle; 18. Vertical pipe; 19. Ball valve; 20. Valve stem; 21. Air outlet shell; 22. Rotating plate; 23. Dry powder cylinder; 24. Limiting rod; 25. Blocking plate; 26. Cam; 27. Rotating wheel; 28. Pull belt; 29. ​​Baffle; 30. Sleeve; 31. Push rod; 32. Rack A; 33. Gear; 34. Connecting pipe; 35. Slide rod; 36. Rack B; 37. Spring A; 38. Spring B; 39. Spring C. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] See Figures 1 to 8 As shown, the present invention provides an underground electrical cabinet for charging piles of new energy vehicles, including an electrical box 1 and a box cover 2. A charging cabinet 3 is installed on the top of the box cover 2, a dehumidifying plate 4 is installed on the inner wall of the electrical box 1, a shell 13 is installed at the bottom of the box cover 2, and an air inlet shell 9 is connected to the bottom of the dehumidifying plate 4. It should be noted that when moisture is generated on the inner wall of the electrical box 1, this moisture will enter the interior of the dehumidification plate 4 through the through holes 5 on both sides of the dehumidification plate 4. The silica gel particles inside the dehumidification plate 4 have extremely strong moisture absorption properties. When moisture comes into contact with the silica gel particles, the silica gel particles will quickly absorb the moisture inside themselves, thereby transferring the moisture inside the electrical box 1 to the dehumidification plate 4, achieving dehumidification of the internal environment of the electrical box 1. This effectively reduces the air humidity inside the electrical box 1, preventing the high humidity environment from adversely affecting the electrical components inside the electrical box 1, thereby improving the service life and operational stability of the electrical equipment.

[0023] A water-cooled box 6 is installed at the bottom of the electrical box 1. A water supply pipe 7 connected to the water-cooled box 6 is provided inside the electrical box 1. A water-cooled pipe 8 is connected to the outside of the water supply pipe 7. A rotating shaft 10 is provided inside the water-cooled pipe 8. Blades 11 are installed on the outer wall of the rotating shaft 10. A fan 12 is fitted at one end of the water-cooled pipe 8 that extends through to the air inlet shell 9. It should be noted that when the electrical components inside the electrical box 1 generate heat, the circulation pump inside the water-cooled box 6 starts, drawing coolant into the water supply pipe 7. The coolant flows along the water supply pipe 7 to the water-cooling pipes 8 connected to both sides and circulates within them. During the flow, the coolant directly absorbs the heat emitted by the electrical components, thereby quickly reducing the temperature inside the electrical box 1. This ensures that the electrical components always operate in a suitable temperature environment, avoiding performance degradation or failure of components due to high temperatures, and ensuring the stable operation of the electrical cabinet. Meanwhile, when the coolant flows through the blades 11 inside the water-cooling pipe 8, the impact force of the coolant will drive the blades 11 to rotate. The blades 11 drive the fan 12 inside the air inlet shell 9 to rotate synchronously through the rotating shaft 10. The suction generated by the rotation of the fan 12 draws the hot air inside the electrical box 1 into the air inlet shell 9. The hot air enters the dehumidification plate 4 along the channel of the air inlet shell 9. At this time, the hot air with a certain temperature will dry the silica gel particles inside the dehumidification plate 4 that are saturated due to the adsorption of water vapor, so that the silica gel particles can regain their moisture absorption capacity. The hot air after the drying operation is completed enters the shell 13 through the connecting pipe and is finally released to the outside through the exhaust pipe 14. Thus, the hot air flows through the silica gel particle layer, causing the water adsorbed inside the silica gel particles to evaporate by heat, thereby realizing the regeneration of silica gel and keeping the silica gel particles in a dry state, ensuring a long-term stable dehumidification effect.

[0024] A horizontal pipe 15 is installed below the box cover 2. A vertical pipe 18 is connected between the water supply pipe 7 and the horizontal pipe 15. A ball valve 19 is rotatably installed inside the vertical pipe 18. A baffle 29 is hinged inside the housing 13. An air outlet shell 21 is installed on the side wall of the housing 13. A rotating plate 22 is rotatably installed inside the air outlet shell 21. A dry powder cylinder 23 is installed below the box cover 2. Two sets of symmetrical blocking plates 25 slide at the bottom of the dry powder cylinder 23. A drive assembly for pushing the two sets of blocking plates 25 to move is provided on the side wall of the air outlet shell 21. A sleeve 30 is installed below the cover 2. Two sets of push rods 31 slide inside the sleeve 30. A rack A32 is installed at one end of the push rod 31. A gear 33 is sleeved at one end of the baffle 29. A connecting pipe 34 is connected to the side wall of the sleeve 30. A slide rod 35 slides on the inner wall of the connecting pipe 34. A rack B36 is installed at the bottom end of the slide rod 35. Springs A37 and B38 are respectively sleeved on the outer walls of the push rod 31 and the slide rod 35.

[0025] It should be noted that when the temperature of the electrical components inside the electrical box 1 rises suddenly due to malfunction or other reasons, the mercury inside the sleeve 30 installed under the box cover 2 will expand due to heat. In the initial stage, the expanding mercury will overcome the elastic force of the spring B38 and push the slide rod 35 inside the connecting pipe 34 to move downward. As the slide rod 35 moves downward, it drives the rack B36 to move downward simultaneously. Since the rack B36 is connected to the valve stem 20 through tooth meshing, the downward movement of the rack B36 will drive the valve stem 20 to rotate, which in turn causes the valve stem 20 to drive the ball valve 19 inside the vertical pipe 18 to rotate. After the ball valve 19 rotates, it no longer blocks the vertical pipe 18, and a part of the coolant inside the water supply pipe 7 can flow into the horizontal pipe 15 through the vertical pipe 18. Then, it is distributed to multiple sets of water spray pipes 16 through the horizontal pipe 15 and sprayed evenly from the nozzle 17 to directly spray and cool the electrical components inside the electrical box 1, weakening the possibility of further temperature rise and causing more serious problems, and greatly reducing the probability of fire. If the spray cooling fails to effectively control the temperature, and a fire occurs inside the electrical box 1, the mercury inside the sleeve 30 will continue to expand. The thrust generated by the mercury overcomes the elastic force of the spring A37, pushing the two sets of push rods 31 to move. The movement of the push rods 31 drives the rack A32 to move synchronously. Since the rack A32 meshes with the gear 33 sleeved at one end of the baffle 29, the movement of the rack A32 will drive the gear 33 to rotate. The rotation of the gear 33 will cause the baffle 29, which is hinged inside the housing 13, to flip. After the baffle 29 flips, it blocks the air outlet at the top of the housing 13, causing the airflow inside the housing 13 to change its flow direction and instead be discharged through the air outlet shell 21 installed on the side wall of the housing 13. When the airflow passes through the air outlet shell 21, the airflow will blow the rotating plate 22 inside to rotate. The rotation of the rotating plate 22, through the transmission action of the rotating wheel 27 and the pull belt 28, causes the cam 26 on the side wall of the dry powder cylinder 23 to rotate. The rotation of the cam 26 During the process, the two sets of symmetrical blocking plates 25 at the bottom of the dry powder cylinder 23 are pushed to move in opposite directions, so that the dry powder inside the dry powder cylinder 23 is no longer blocked. The dry powder falls intermittently above the rotating plate 22. The rotating plate 22 transports the dry powder to the opening of the air outlet shell 21 during rotation. Finally, the dry powder is evenly sprayed onto the surface of the burning electrical components with the help of airflow, thus realizing the fire extinguishing operation. The dry powder can fall intermittently by using the cam 26 to push the blocking plates 25. This ensures a continuous supply of dry powder during the fire extinguishing process and avoids the waste caused by releasing a large amount at once. This makes the use of dry powder more efficient and reasonable. At the same time, the spraying method of airflow can make the dry powder more accurately cover the fire area, especially the gaps and hidden parts of electrical components, to ensure the thoroughness of fire extinguishing, effectively curb the spread of fire, quickly extinguish the fire source, minimize the damage of fire to the internal components of electrical box 1, and reduce the equipment maintenance costs caused by fire.

[0026] See Figure 2As shown, the dehumidifying plate 4 has through holes 5 on both sides and silica gel particles inside. When moisture in the underground environment enters the electrical box 1, or when electrical components in the electrical box 1 generate a small amount of water vapor during operation, the water vapor will enter the interior of the dehumidifying plate 4 through the through holes 5, ensuring that the humid air can have extensive contact with the silica gel particles inside the dehumidifying plate 4, thereby achieving dehumidification, ensuring the dryness inside the electrical box 1, and preventing electrical components from getting damp and short-circuiting.

[0027] See Figure 5 As shown, an exhaust pipe 14 is connected to the top of the housing 13. The dehumidification plate 4 is connected to the housing 13 through a connecting pipe. A filter plate is installed at one end of the housing 13. When the dehumidification plate 4 is drying and regenerating silica gel particles, hot air with water vapor enters the housing 13 through the connecting pipe and is then discharged to the outside through the exhaust pipe 14, thereby effectively removing the moisture inside the electrical box 1 and maintaining a dry environment inside the electrical box 1.

[0028] See Figure 3 As shown, water spray pipes 16 are connected to both sides of the horizontal pipe 15, and a nozzle 17 is connected to the bottom of the water spray pipe 16.

[0029] See Figures 5 to 6 As shown, two sets of symmetrical fixing frames are installed on both sides of the dry powder cylinder 23. A limiting rod 24 is installed between the two sets of fixing frames. The two ends of the blocking plate 25 slide on the outer wall of the limiting rod 24. A spring C39 is sleeved on the outer wall of the limiting rod 24. The limiting rod 24 guides and limits the movement of the blocking plate 25. The spring C39 sleeved on the outer wall of the limiting rod 24 has a reset function. During the fire extinguishing process, when the cam 26 no longer pushes the blocking plate 25, the elastic force of the spring C39 will pull the two sets of blocking plates 25 to move towards each other, so that they return to the position of sealing the bottom of the dry powder cylinder 23, thereby realizing intermittent spraying of dry powder.

[0030] See Figures 5 to 6 As shown, the drive assembly includes a rotating rod that rotates on the side wall of the dry powder cylinder 23. A cam 26 is sleeved on the outer wall of the rotating rod. Rotating wheels 27 are sleeved on both ends of the rotating rod and the rotating plate 22. The two sets of rotating wheels 27 are rotatably connected by a pull belt 28.

[0031] See Figure 8 As shown, a valve stem 20 is installed on the outer wall of the ball valve 19. The outer wall of the valve stem 20 is provided with teeth. The rack B36 is connected to the valve stem 20 through tooth meshing. The rack A32 is connected to the gear 33 through tooth meshing.

[0032] See Figure 8As shown, the elastic coefficient of spring A37 is smaller than that of spring B38, which can realize a graded response when the temperature is abnormal. In the initial stage of a sudden temperature rise, the spring force of spring B38 is first overcome to start the coolant cooling. If the cooling is ineffective and the temperature is even higher, the spring force of spring A37 is overcome to trigger the fire extinguishing mechanism, ensuring that the protective measures are activated in an orderly manner according to the degree of danger.

[0033] See Figure 8 As shown, both the sleeve 30 and the limiting rod 24 are filled with mercury.

[0034] See Figure 1 As shown, a moisture-proof pad is installed at the bottom of the electrical box 1. The moisture-proof pad is made of polyethylene foam material. The moisture-proof pad is glued and fixed to the bottom of the electrical box 1 with waterproof adhesive. The closed-cell structure of the polyethylene foam material can effectively isolate underground moisture penetration, enhance the sealing of the bottom of the electrical box 1, prevent moisture intrusion and damage to electrical components, and ensure its long-term stable operation.

[0035] Working principle: When moisture is generated on the inner wall of the electrical box 1, this moisture enters the dehumidification plate 4 through the through holes 5 on both sides of the dehumidification plate 4. The silica gel particles inside the dehumidification plate 4 have extremely strong moisture absorption properties. When moisture comes into contact with the silica gel particles, the silica gel particles quickly absorb the moisture inside themselves, thereby transferring the moisture inside the electrical box 1 to the dehumidification plate 4, thus achieving dehumidification of the internal environment of the electrical box 1. When the electrical components inside the electrical box 1 generate heat, the circulation pump inside the water-cooled box 6 starts, drawing coolant into the water supply pipe 7. The coolant flows along the water supply pipe 7 to the water-cooled pipes 8 connected on both sides and circulates within them. During the flow, the coolant directly absorbs the heat emitted by the electrical components, thereby quickly reducing the temperature inside the electrical box 1. Meanwhile, when the coolant flows through the blades 11 inside the water-cooling pipe 8, the impact force of the coolant will drive the blades 11 to rotate. The blades 11 drive the fan 12 inside the air intake shell 9 to rotate synchronously through the rotating shaft 10. The suction generated by the rotation of the fan 12 draws the hot air inside the electrical box 1 into the air intake shell 9. The hot air enters the dehumidification plate 4 along the channel of the air intake shell 9. At this time, the hot air with a certain temperature will dry the silica gel particles inside the dehumidification plate 4 that are saturated due to the adsorption of water vapor, so that the silica gel particles regain their moisture absorption capacity. The hot air after the drying operation is completed enters the shell 13 through the connecting pipe and is finally released to the outside through the exhaust pipe 14. When the temperature of the electrical components inside the electrical box 1 rises suddenly due to faults or other reasons, the mercury inside the sleeve 30 installed under the box cover 2 will expand due to heat. In the initial stage, the expanding mercury will overcome the elastic force of the spring B38 and push the slide rod 35 inside the connecting pipe 34 to move downward. As the slide rod 35 moves downward, it drives the rack B36 to move downward at the same time. Since the rack B36 and the valve stem 20 are connected by tooth meshing, the downward movement of the rack B36 will drive the valve stem 20 to rotate, which in turn causes the valve stem 20 to drive the ball valve 19 inside the vertical pipe 18 to rotate. After the ball valve 19 rotates, it no longer blocks the vertical pipe 18, and a part of the coolant inside the water supply pipe 7 can flow into the horizontal pipe 15 through the vertical pipe 18, and then be distributed to multiple sets of spray pipes 16 through the horizontal pipe 15 and sprayed evenly from the nozzle 17. If the spray cooling fails to effectively control the temperature, and a fire occurs inside the electrical box 1, the mercury inside the sleeve 30 will continue to expand. The thrust generated by the mercury will overcome the elastic force of the spring A37, pushing the two sets of push rods 31 to move. The movement of the push rods 31 will cause the rack A32 to move synchronously. Since the rack A32 meshes with the gear 33 sleeved at one end of the baffle 29, the movement of the rack A32 will drive the gear 33 to rotate. The rotation of the gear 33 will cause the baffle 29, which is hinged inside the housing 13, to flip. After the baffle 29 flips, it will block the air outlet at the top of the inside of the housing 13, causing the airflow inside the housing 13 to change direction and instead pass through the side wall of the housing 13. The installed air outlet shell 21 discharges air. When the airflow passes through the interior of the air outlet shell 21, the airflow blows the internal rotating plate 22 to rotate. The rotation of the rotating plate 22, through the transmission action of the rotating wheel 27 and the pull belt 28, causes the cam 26 on the side wall of the dry powder cylinder 23 to rotate. During the rotation of the cam 26, it pushes the two sets of symmetrical blocking plates 25 at the bottom of the dry powder cylinder 23 to move in opposite directions, so that the dry powder inside the dry powder cylinder 23 is no longer blocked. The dry powder falls intermittently above the rotating plate 22. During the rotation, the rotating plate 22 transports the dry powder to the opening of the air outlet shell 21. Finally, with the help of the airflow, the dry powder is evenly sprayed onto the surface of the burning electrical components to achieve the fire extinguishing operation.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An underground electrical cabinet for charging piles of new energy vehicles, comprising an electrical box (1) and a box cover (2), wherein a charging cabinet (3) is installed on the top of the box cover (2), characterized in that: The electrical box (1) is equipped with a dehumidifying plate (4) on its inner wall, and a housing (13) is installed at the bottom of the box cover (2). The bottom of the dehumidifying plate (4) is connected to an air inlet housing (9). The electrical box (1) is equipped with a water-cooled box (6) at the bottom. The electrical box (1) is equipped with a water supply pipe (7) that communicates with the water-cooled box (6). The water supply pipe (7) is connected to a water-cooled pipe (8) on the outside. The water-cooled pipe (8) is equipped with a rotating shaft (10) inside. The rotating shaft (10) is equipped with blades (11) on its outer wall. The water-cooled pipe (8) is fitted with a fan (12) at one end that extends through the air inlet shell (9). A horizontal pipe (15) is installed below the box cover (2), and a vertical pipe (18) is connected between the water supply pipe (7) and the horizontal pipe (15). A ball valve (19) is rotatably installed inside the vertical pipe (18). A baffle (29) is hinged inside the housing (13). An air outlet shell (21) is installed on the side wall of the housing (13). A rotating plate (22) is rotatably provided inside the air outlet shell (21). A dry powder cylinder (23) is installed below the box cover (2). Two sets of symmetrical blocking plates (25) slide at the bottom end of the dry powder cylinder (23). A drive assembly for pushing the two sets of blocking plates (25) to move is provided on the side wall of the air outlet shell (21). A sleeve (30) is installed below the box cover (2). Two sets of push rods (31) slide inside the sleeve (30). A rack A (32) is installed at one end of the push rod (31). A gear (33) is sleeved at one end of the baffle (29). A connecting pipe (34) is connected to the side wall of the sleeve (30). A slide rod (35) slides on the inner wall of the connecting pipe (34). A rack B (36) is installed at the bottom end of the slide rod (35). Springs A (37) and B (38) are respectively sleeved on the outer walls of the push rod (31) and the slide rod (35).

2. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: The dehumidification plate (4) has through holes (5) on both sides, and the interior of the dehumidification plate (4) contains silica gel particles.

3. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: An exhaust pipe (14) is connected to the top of the housing (13), and the dehumidification plate (4) is connected to the housing (13) through a connecting pipe. A filter plate is installed at one end of the housing (13).

4. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: Water spray pipes (16) are connected to both sides of the horizontal pipe (15), and a nozzle (17) is connected to the bottom of the water spray pipes (16).

5. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: Two sets of symmetrical fixing frames are installed on both sides of the dry powder cylinder (23), and a limiting rod (24) is installed between the two sets of fixing frames. The two ends of the blocking plate (25) slide on the outer wall of the limiting rod (24), and a spring C (39) is sleeved on the outer wall of the limiting rod (24).

6. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: The drive assembly includes a rotating rod that rotates on the side wall of the dry powder cylinder (23). A cam (26) is fitted on the outer wall of the rotating rod. Rotating wheels (27) are fitted on both ends of the rotating rod and the rotating plate (22). The two sets of rotating wheels (27) are rotatably connected by a pull belt (28).

7. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: The ball valve (19) has a valve stem (20) installed on its outer wall. The outer wall of the valve stem (20) is provided with teeth. The rack B (36) is connected to the valve stem (20) through tooth meshing. The rack A (32) is connected to the gear (33) through tooth meshing.

8. The underground electrical cabinet for new energy vehicle charging piles according to claim 1, characterized in that: The spring constant of spring A (37) is less than that of spring B (38).

9. A buried electrical cabinet for a new energy vehicle charging pile according to claim 1, characterized in that: The sleeve (30) and the limiting rod (24) are both filled with mercury.

10. A buried electrical cabinet for a new energy vehicle charging pile according to claim 1, characterized in that: A moisture-proof pad is installed at the bottom of the electrical box (1). The moisture-proof pad is made of polyethylene foam material and is bonded and fixed to the bottom of the electrical box (1) with waterproof adhesive.

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