Integrated fireproof high-low voltage switch cabinet

Abstract

The application discloses an integrated fireproof high-low voltage switch cabinet and relates to the technical field of switch cabinets. The integrated fireproof high-low voltage switch cabinet comprises a base, an outer shell body installed on the upper surface of the base, and a switch cabinet body. The switch cabinet body is fixed inside the outer shell body, and a fireproof plate is fixed on the back side of the switch cabinet body inside the outer shell body. When a fire occurs in the switch cabinet body, a smoke sensor is installed at the air outlet of the switch cabinet body to monitor the fire condition, and the fire signal is further fed back to a controller. The controller controls the closing assembly to close, so that the switch cabinet body is in a relatively sealed state, the oxygen supply is isolated, the electromagnetic valve is opened by the controller, the branch pipeline is opened, the heptafluoropropane in the heptafluoropropane extinguisher enters the switch cabinet body, and the fire in the switch cabinet body is extinguished, thereby reducing economic losses.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to an integrated fireproof high and low voltage switchgear. Background Technology

[0002] High and low voltage switchgear, as the name suggests, is equipment for connecting high-voltage or low-voltage cables. Generally, power supply bureaus and substations use high-voltage switchgear, which then steps down the voltage through transformers to low-voltage switchgear, and finally to various power distribution boxes. In use, the external line first enters the main control switch inside the switchgear, and then enters the branch control switches. The main function of switchgear is to open, close, control, and protect electrical equipment during the power generation, transmission, distribution, and energy conversion processes in the power system. The main components inside the switchgear include circuit breakers, disconnect switches, load switches, operating mechanisms, instrument transformers, and various protection devices. With the advancement of technology and the improvement of people's awareness of electrical safety, fire-proof and explosion-proof high and low voltage switchgear has appeared, effectively improving the level of electrical safety.

[0003] Chinese invention patent application CN112838507A discloses a fireproof and explosion-proof high and low voltage switchgear. The device is equipped with a movable plate, a pressure relief pipe, and a pressure relief hole. When the switchgear malfunctions and causes high temperature and high pressure gas to be generated inside, the movable plate is pushed to move, thereby allowing the pressure relief pipe to be inserted into the pressure relief hole. This completes the connection between the internal space of the cabinet and the external environment, releasing the pressure inside the cabinet and preventing the switchgear from bursting, which would lead to increased losses and personnel injuries.

[0004] Chinese utility model patent CN216251814U discloses a new type of safe and reliable high and low voltage switchgear. The device has a suspended heptafluoropropane fire extinguisher fixedly connected to the bottom of the partition. When a fire occurs in the internal components of the switchgear due to short circuit or other reasons, when the ambient temperature around the temperature-sensing glass bulb of the suspended heptafluoropropane fire extinguisher reaches a certain value, the temperature-sensing glass bulb ruptures, and the high-pressure nitrogen gas inside the suspended heptafluoropropane fire extinguisher immediately pushes the heptafluoropropane extinguishing agent to be released to extinguish the fire and reduce economic losses.

[0005] However, because the ventilation system inside the switchgear is still working when a fire occurs, the traditional fire extinguishing equipment inside the switchgear results in a high oxygen content inside the switchgear, which is not conducive to fire extinguishing and increases the difficulty of fire extinguishing. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an integrated fire-resistant high and low voltage switchgear, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated fireproof high and low voltage switchgear, comprising a base and an outer shell mounted on the upper surface of the base, and a switch cabinet body fixed within the outer shell, with a fireproof plate fixed to the back side of the switch cabinet body; the gap between the switch cabinet body and the side wall of the outer shell forms a side cavity; partitions are evenly spaced from top to bottom inside the switch cabinet body to form several electrical equipment compartments within the switch cabinet body; a safety airbag is provided at the bottom of each electrical equipment compartment, with a hot-melt film evenly distributed on the airbag and filled with carbon dioxide gas; and a safety airbag is provided at the top of each electrical equipment compartment. The switch cabinet is equipped with fire extinguishing nozzles. A heptafluoropropane fire extinguisher is installed above the switch cabinet. The heptafluoropropane fire extinguisher is connected to the fire extinguishing nozzle via a pipeline, and a solenoid valve is also installed between the heptafluoropropane fire extinguisher and the fire extinguishing nozzle. Ventilation windows are symmetrically located on both sides of the electrical equipment room to accelerate airflow inside the room. A bellows is detachably connected to the outside of the bellows, and a closing assembly is installed inside the bellows. The closing assembly includes a mounting frame fixed inside the bellows. Connecting shafts are rotatably mounted at equal intervals on the inner side of the mounting frame. A closing plate is fixed on the connecting shaft. When the closing plate is parallel to the axial direction of the mounting frame, the mounting frame is in a closed state.

[0008] Furthermore, it also includes a smoke sensor located inside the air box at the airflow output end of the electrical equipment room; a battery, the gap between the back side of the fireproof board and the back side of the outer casing forms an equipment cavity, the battery is located inside the equipment cavity, and a controller is installed on one side of the battery, the signal input terminal of the controller is electrically connected to the signal output terminal of the smoke sensor, and the signal output terminal of the controller controls the operation of the solenoid valve and the closing assembly.

[0009] Furthermore, a top cabinet is fixed to the upper end of the outer casing, and a fitting groove is opened on the lower surface of the top cabinet to fit into the outer casing. A cabinet door is hinged to the front surface of the top cabinet. The heptafluoropropane fire extinguisher is located inside the top cabinet. A connecting pipe is installed on the outside of the switch cabinet. One end of the connecting pipe extends into the inside of the top cabinet and is equipped with a first telescopic pipe. The first telescopic pipe is connected to the output end of the heptafluoropropane fire extinguisher. A branch pipe connected to the fire extinguishing nozzle is installed on the outside of the connecting pipe. The solenoid valve is installed on the branch pipe to control the connection and disconnection of the branch pipe.

[0010] Furthermore, a main air duct is symmetrically installed inside the equipment cavity. The upper end of the main air duct penetrates the side wall of the top cabinet and is equipped with a fan. A branch air duct is installed on the outside of the main air duct. A second telescopic pipe that penetrates the fireproof board is fixed at the other end of the branch air duct. The other end of the second telescopic pipe extends into the air box.

[0011] Furthermore, a transmission cavity is provided at the lower end of the mounting frame away from the windshield, and the lower end of the connecting shaft extends into the transmission cavity and is equipped with a worm gear; a driven shaft is rotatably installed inside the wind box, and a worm gear is provided on the driven shaft to mesh with the worm gear.

[0012] Furthermore, the inner side of the outer casing is provided with a transmission assembly for driving the worm gear to rotate synchronously. The transmission assembly includes a drive shaft, which is rotatably mounted on the bottom of the outer side of the switch cabinet, and both ends of the drive shaft extend into the side cavity and are equipped with first bevel gears; a transmission shaft, which is rotatably mounted in the side cavity, and a second bevel gear that meshes with the first bevel gear is fixedly sleeved near the lower end of the transmission shaft; a third bevel gear is fixedly sleeved on the outer side of the transmission shaft near the bellows, and one end of the driven shaft passes through the bellows and is equipped with a fourth bevel gear that meshes with the third bevel gear.

[0013] Furthermore, a fixed bracket is fixed at the bottom of the switch cabinet and rotatably connected to the drive shaft. A spring is provided on the outside of the drive shaft, one end of which is connected to the fixed bracket, and the other end of which is fixed to the drive shaft. A connecting plate is provided on the outside of the drive shaft, located on the side of the spring, and an insertion hole is provided on the connecting plate. A cylinder is fixed at the bottom of the switch cabinet, and a piston is slidably connected inside the cylinder. One end of the piston passes through the cylinder and is fitted with a plug rod, which is inserted into the insertion hole to lock the rotation of the drive shaft. A connecting air pipe is installed between the other end of the cylinder and the airbag. The air pressure at both ends of the piston is the same, and the air pressure at both ends of the piston is greater than atmospheric pressure.

[0014] Furthermore, the switch cabinet has a wiring conduit on the back side, one end of which passes through the fireproof board and the outer shell in sequence and is connected to a limit nut by a thread. The back of the outer shell has symmetrically hinged side doors, which are horizontal "L" shaped structures.

[0015] Furthermore, the front end of the switch cabinet extends through the front surface of the outer casing, and a front door adapted to it is hinged to one side of the front surface of the outer casing, with a sealing gasket provided on the inner side of the front door.

[0016] Furthermore, the front surface of the front door is provided with an observation window, and a temperature and humidity sensor for monitoring the temperature and humidity inside the switch cabinet is installed on the front door.

[0017] The present invention has the following beneficial effects: (1) When a fire occurs inside the switch cabinet, the integrated fireproof high and low voltage switch cabinet monitors the fire situation by installing a smoke sensor at the air outlet of the switch cabinet and further feeds the fire signal back to the controller. The controller closes the closing component to keep the switch cabinet in a relatively sealed state and prevents the continuous input of oxygen. In addition, the controller opens the solenoid valve and opens the branch pipe, so that the heptafluoropropane inside the heptafluoropropane fire extinguisher enters the switch cabinet through the first telescopic pipe, the connecting pipe and the branch pipe, thereby extinguishing the fire inside the switch cabinet and reducing economic losses.

[0018] (2) The integrated fireproof high and low voltage switchgear, through the setting of fireproof board, isolates the switchgear body from the battery and controller, avoids fire from affecting the operation of the battery and controller, thereby facilitating the controller's feedback on the fire and the independent power supply of the battery, and improving the stability of the fire response.

[0019] (3) The integrated fireproof high and low voltage switchgear, by setting up an electrical equipment room inside the switchgear, facilitates the partitioned installation of electrical components. By separately monitoring smoke in each electrical equipment room and separately extinguishing fires in each electrical equipment room, the accidental injury to areas without fire during fire extinguishing is reduced, thereby reducing economic losses.

[0020] (4) The integrated fireproof high and low voltage switchgear achieves ventilation inside the air box through a fan, main air duct, branch air duct and second telescopic pipe. The air window accelerates the air flow inside the switchgear, which is conducive to heat dissipation inside the switchgear. When a fire occurs, the heat-melting film on the safety airbag is ruptured by heat. At this time, the carbon dioxide inside the safety airbag is sprayed out to initially control the fire. As the gas inside the safety airbag escapes, a pressure difference is generated at both ends of the piston, so that the plug rod is separated from the plug hole, thereby releasing the potential energy of the spring spring compression to drive the drive shaft to rotate. Through the meshing between gears, the connecting shaft rotates, which further drives the closing plate to rotate, so that the inside of the switchgear is in a relatively sealed state, isolating the continuous input of oxygen and accelerating the fire extinguishing effect.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 In this invention Figure 1 Another perspective view; Figure 3 This is a schematic diagram of the switch cabinet structure in this invention; Figure 4 In this invention Figure 3 Another perspective view; Figure 5 In this invention Figure 3 The main view; Figure 6 For the present invention Figure 5 An enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the connection structure between the top cabinet and the outer shell in this invention; Figure 8 This is a schematic diagram of the arrangement structure of the fire extinguishing nozzles in this invention; Figure 9 This is a schematic diagram of the structure of the bellows in this invention; Figure 10 This is a schematic diagram of the internal structure of the bellows in this invention; Figure 11 This is a schematic diagram of the driving structure of the closed plate in this invention; Figure 12 For the present invention Figure 11 An enlarged structural diagram at point B in the middle; Figure 13 This is a schematic diagram of the internal structure of the present invention; Figure 14 This is a schematic diagram of the drive structure of the drive shaft in this invention; Figure 15 This is a schematic diagram of the insertion structure of the insertion rod and the insertion hole in this invention.

[0023] In the diagram: 1. Base; 2. Outer casing; 3. Switch cabinet; 4. Partition; 5. Front door; 6. Side cavity; 7. Fireproof board; 8. Equipment cavity; 9. Side door; 10. Top cabinet; 11. Cabinet door; 12. Fan; 13. Air box; 14. Main air duct; 15. Heptafluoropropane fire extinguisher; 16. Connecting pipe; 17. First telescopic pipe; 18. Air window; 19. Wiring pipe; 20. Branch air duct; 21. Battery; 22. Controller; 23. Fire extinguishing nozzle; 24. Safety airbag; 25. Drive shaft; 26. Transmission shaft; 27. First bevel gear 28. Second bevel gear; 29. ​​Fitting groove; 30. Branch pipe; 31. Solenoid valve; 32. Smoke sensor; 33. Mounting frame; 34. Connecting shaft; 35. Closing plate; 36. Transmission chamber; 37. Driven shaft; 38. Worm gear; 39. Worm wheel; 40. Third bevel gear; 41. Fourth bevel gear; 42. Second telescopic tube; 43. Hot melt film; 44. Clock spring; 45. Connecting plate; 46. Cylinder body; 47. Insert rod; 48. Connecting air pipe; 49. Insertion hole; 50. Compression spring; 51. Piston; 52. Fixed bracket. Detailed Implementation

[0024] Please see Figure 1 - Figure 15An integrated fireproof high and low voltage switchgear includes a base 1 and an outer shell 2 mounted on the upper surface of the base 1. Preferably, an anti-corrosion layer is provided on the outside of the outer shell 2 to improve the service life of the outer shell 2. It also includes a switch cabinet 3, which is fixed inside the outer shell 2. Preferably, the upper and lower ends of the switch cabinet 3 are provided with support plates, which are integrally formed with the switch cabinet 3 to fix the switch cabinet 3 inside the outer shell 2. A fireproof board 7 is fixed on the back side of the switch cabinet 3 inside the outer shell 2. Preferably, the fireproof board 7 is made of fire-resistant fiberboard and is mainly used for fire prevention and heat conduction prevention. The gap between the side wall of the switch cabinet 3 and the side wall of the outer shell 2 forms a side cavity 6. The gap between the back side of the fireproof board 7 and the back side of the outer shell 2 forms an equipment cavity 8. The fireproof board 7 is used to prevent fire inside the switch cabinet 3 from affecting the equipment cavity 8 and to ensure that the electrical components inside the equipment cavity 8 are still in working condition in the event of a fire.

[0025] The integrated fireproof high and low voltage switchgear provided in this embodiment also includes partitions 4. The partitions 4 are evenly spaced from bottom to top inside the switchgear body 3 so that the internal space of the switchgear body 3 forms several electrical equipment rooms, which is conducive to the partitioned installation of electrical components. A safety airbag 24 is provided at the bottom of the electrical equipment room. A heat-melting film 43 is evenly provided on the safety airbag 24 and the safety airbag 24 is filled with carbon dioxide gas. When a fire occurs inside the electrical equipment room, the heat-melting film 43 on the safety airbag 24 is ruptured by heat. At this time, the carbon dioxide inside the safety airbag 24 is ejected to initially control the fire. A fire extinguishing nozzle 23 is provided at the top of the electrical equipment room. A heptafluoropropane fire extinguisher 15 is installed above the switchgear body 3. The heptafluoropropane fire extinguisher 15 and the fire extinguishing nozzle 23 are connected by a pipeline. A solenoid valve 31 is also provided between the heptafluoropropane fire extinguisher 15 and the fire extinguishing nozzle 23.

[0026] The heptafluoropropane fire extinguisher 15 can adopt an intelligent cabinet-type heptafluoropropane fire extinguishing device disclosed in utility model patent CN215084523U, the specific structure of which will not be described here.

[0027] In addition, to facilitate cooling and heat dissipation inside the switch cabinet 3, the integrated fireproof high and low voltage switch cabinet provided in this embodiment also includes air vents 18. The air vents 18 are symmetrically arranged on both sides of the electrical equipment room to accelerate the airflow inside the electrical equipment room and accelerate the cooling of electrical components. The air box 13 is detachably connected to the outside of the air vent 18. Preferably, the detachable connection between the air box 13 and the air vent 18 is a snap-fit ​​connection to facilitate the later inspection and maintenance of the air box 13. A sealing ring is provided at the connection to improve the sealing effect at the connection between the air box 13 and the air vent 18. The air box 13 is equipped with a closing component inside, and a smoke sensor 32 is installed inside the air box 13 located at the airflow output end inside the electrical equipment room. By setting the smoke sensor 32 at the air outlet of the electrical equipment room, it is convenient to monitor the fire situation inside the electrical equipment room.

[0028] In addition, the integrated fireproof high and low voltage switchgear provided in this embodiment also includes a storage battery 21. The storage battery 21 is located inside the equipment cavity 8, and a controller 22 is installed on one side of the storage battery 21. The signal input terminal of the controller 22 is electrically connected to the signal output terminal of the smoke sensor 32, and the signal output terminal of the controller 22 controls the operation of the solenoid valve 31 and the closing component. Preferably, the storage battery 21 is used to power the controller 22, the solenoid valve 31, the smoke sensor 32 and the closing component, so as to avoid the failure of fire extinguishing due to power failure caused by fire inside the switchgear 3.

[0029] In this scheme, when a fire occurs inside the switch cabinet 3, the smoke sensor 32 monitors the fire situation and feeds the fire signal back to the controller 22. The controller 22 then closes the closing component, making the switch cabinet 3 relatively sealed and preventing continuous oxygen input. In addition, the controller 22 opens the solenoid valve 31, allowing heptafluoropropane from the heptafluoropropane fire extinguisher 15 to be introduced into the switch cabinet 3, thus extinguishing the fire inside the switch cabinet 3 and reducing economic losses. The fireproof plate 7 isolates the switch cabinet 3 from the battery 21 and the controller 22, preventing the fire from affecting the operation of the battery 21 and the controller 22. This facilitates the controller 22's feedback on the fire and the independent power supply to the battery 21, improving the stability of the fire response.

[0030] like Figure 9 - Figure 12 As shown, the closing assembly provided in this embodiment includes a mounting frame 33 fixed inside the bellows 13. A connecting shaft 34 is rotatably mounted at equal intervals on the inner side of the mounting frame 33. A closing plate 35 is fixed on the connecting shaft 34. Preferably, the closing plate 35 is a fireproof component. When the closing plate 35 is parallel to the length direction of the mounting frame 33, the mounting frame 33 is in a closed state, which can then close the vent 18, making the inside of the switch cabinet 3 relatively sealed, thereby facilitating the fire extinguishing of the electrical components inside the switch cabinet 3.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, to facilitate the installation of the heptafluoropropane fire extinguisher 15, a top cabinet 10 is fixed to the upper end of the outer casing 2. A fitting groove 29 is formed on the lower surface of the top cabinet 10 to fit into the outer casing 2, and the fitting groove 29 is filled with sealant to improve the sealing effect between the outer casing 2 and the top cabinet 10. To facilitate inspection and maintenance of the top cabinet 10, a cabinet door 11 is hinged to the front surface of the top cabinet 10. Furthermore, the heptafluoropropane fire extinguisher 15 is located inside the top cabinet 10, and a switch cabinet 3 is installed on the outside of the switch cabinet. A connecting pipe 16 is provided, with one end extending into the top cabinet 10 and equipped with a first telescopic pipe 17. The first telescopic pipe 17 is connected to the output end of the heptafluoropropane fire extinguisher 15. The first telescopic pipe 17 facilitates the connection between the connecting pipe 16 and the output end of the heptafluoropropane fire extinguisher 15. A branch pipe 30 connected to the fire extinguishing nozzle 23 is installed on the outside of the connecting pipe 16. A solenoid valve 31 is installed on the branch pipe 30 to control the connection and disconnection of the branch pipe 30.

[0032] In this embodiment, by setting up branch pipes 30 and solenoid valves 31, smoke monitoring and fire extinguishing can be carried out separately for each electrical equipment room, thereby reducing accidental damage to areas without fire during fire extinguishing and minimizing economic losses.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown, to improve the cooling and heat dissipation inside the switch cabinet 3, main air ducts 14 are symmetrically installed on both sides inside the equipment cavity 8. The upper end of the main air duct 14 penetrates the side wall of the top cabinet 10 and is equipped with a fan 12. There are two fans 12 in total, one of which is a blower and the other is an exhaust fan, so as to realize the air circulation inside and outside the switch cabinet 3 and improve the cooling and heat dissipation effect inside the switch cabinet 3. Alternatively, only one fan 12 can be installed.

[0034] Specifically, in order to further realize the air circulation inside and outside the switch cabinet 3, a branch air duct 20 is installed on the outside of the main air duct 14. The other end of the branch air duct 20 is fixed with a second telescopic pipe 42 that penetrates the fireproof board 7. The other end of the second telescopic pipe 42 extends into the air box 13. Preferably, both outer sides of the end of the second telescopic pipe 42 located inside the air box 13 can be detachably installed with fastening clamps. The fastening clamps restrict the second telescopic pipe 42 to prevent the second telescopic pipe 42 from detaching from the air box 13.

[0035] In this scheme, ventilation inside the air box 13 is achieved through the fan 12, main air duct 14, branch air duct 20, and second telescopic pipe 42. The air vent 18 is set to accelerate the air flow inside the switch cabinet 3, which is conducive to heat dissipation inside the switch cabinet 3.

[0036] like Figure 9 - Figure 12 As shown, to facilitate the rotation of the connecting shaft 34, a transmission cavity 36 is provided at the lower end of the mounting frame 33 away from the wind window 18. The lower end of the connecting shaft 34 extends into the transmission cavity 36 and is equipped with a worm gear 39. In addition, a driven shaft 37 is rotatably installed inside the wind box 13. The driven shaft 37 is equipped with a worm 38 that meshes with the worm gear 39. It should be noted that since the transmission between the worm gear 39 and the worm 38 has a certain reverse self-locking effect, only the worm 38 can drive the worm gear 39, and the worm gear 39 cannot drive the worm 38. Therefore, the wind force is avoided from driving the closing plate 35 to rotate, thus improving the stability of the closing plate 35 during operation.

[0037] In this scheme, the driven shaft 37 drives the worm gear 38 to rotate. Through the meshing between the worm gear 38 and the worm wheel 39, the connecting shaft 34 rotates, which in turn drives the closing plate 35 to rotate, thereby adjusting the angle of the closing plate 35. This not only allows the vent 18 to be closed to facilitate fire extinguishing inside the switch cabinet 3, but also helps to adjust the airflow effect inside the switch cabinet 3, improving the practicality of the equipment.

[0038] like Figure 5 , Figure 6 , Figure 11 and Figure 12 As shown, in order to drive the driven shaft 37, a transmission assembly for driving the worm gear 38 to rotate synchronously is provided inside the outer casing 2. The transmission assembly includes a drive shaft 25, which is rotatably mounted on the bottom of the outer side of the switch cabinet 3. Both ends of the drive shaft 25 extend into the side cavity 6 and are equipped with a first bevel gear 27. The transmission assembly also includes a transmission shaft 26, which is rotatably mounted in the side cavity 6. A second bevel gear 28 that meshes with the first bevel gear 27 is fixedly sleeved near the lower end of the transmission shaft 26.

[0039] In this scheme, the drive shaft 25 rotates, which drives the first bevel gear 27 to rotate. The meshing between the first bevel gear 27 and the second bevel gear 28 causes the transmission shaft 26 to rotate.

[0040] To enable transmission between the drive shaft 26 and the driven shaft 37, a third bevel gear 40 is fixedly mounted on the outside of the drive shaft 26 near the air box 13. One end of the driven shaft 37 passes through the air box 13 and is equipped with a fourth bevel gear 41 that meshes with the third bevel gear 40.

[0041] In this embodiment, the third bevel gear 40 is driven to rotate by the transmission shaft 26, and the driven shaft 37 rotates with the fourth bevel gear 41 through the meshing between the third bevel gear 40 and the fourth bevel gear 41.

[0042] like Figures 13-15As shown, to drive the drive shaft 25 to rotate, the bottom of the switch cabinet 3 provided in this embodiment is fixed with a fixed bracket 52 that is rotatably connected to the drive shaft 25. The fixed bracket 52 has an L-shaped structure, and a spring-loaded spring 44 is provided on the outside of the drive shaft 25. One end of the spring-loaded spring 44 is connected to the fixed bracket 52, and the other end of the spring-loaded spring 44 is fixed to the drive shaft 25. The spring-loaded spring 44 is in a compressed state. When the potential energy of the compressed spring-loaded spring 44 is released, it drives the drive shaft 25 to rotate. In addition, on the outside of the drive shaft 25... A connecting plate 45 is located on one side of the spring 44, and an insertion hole 49 is provided on the connecting plate 45. A cylinder 46 is fixed at the bottom of the switch cabinet 3. A piston 51 is slidably connected inside the cylinder 46. One end of the piston 51 passes through the cylinder 46 and is fitted with an insertion rod 47. The insertion rod 47 is inserted into the insertion hole 49 to lock the rotation of the drive shaft 25. A connecting air pipe 48 is installed between the other end of the cylinder 46 and the airbag 24. The air pressure at both ends of the piston 51 is the same, and the air pressure at both ends of the piston 51 is greater than atmospheric pressure. A compression spring 50 is sleeved on the insertion rod 47. The compression spring 50 is located on the side of the piston 51 near the connecting plate 45, and the two ends of the compression spring 50 are respectively supported on the inner wall of the corresponding end of the piston 51 and the cylinder 46.

[0043] Specifically, when a fire occurs, the heat-fused film 43 on the airbag 24 ruptures due to heat. At this time, carbon dioxide inside the airbag 24 is released to initially control the fire. As the gas inside the airbag 24 escapes, the air pressure on the piston 51 toward the end connected to the air pipe 48 decreases, thereby creating a pressure difference between the two ends of the piston 51. This further causes the piston 51 to move toward the end connected to the air pipe 48, thereby moving the insertion rod 47 and separating it from the insertion hole 49. This, in turn, unlocks the drive shaft 25, thereby releasing the potential energy compressed by the spring 44 to drive the drive shaft 25 to rotate.

[0044] like Figure 4 and Figure 5 As shown, to facilitate cable access and output, a wiring conduit 19 is provided on the back side of the switch cabinet 3. One end of the wiring conduit 19 passes through the fireproof plate 7 and the outer shell 2 in sequence and is connected to a limit nut by a thread. Preferably, a groove is provided inside the switch cabinet 3, and a countersunk head is fixed at the other end of the wiring conduit 19. The wiring conduit 19 is installed by the cooperation between the countersunk head and the groove. The limit nut is installed after the other end of the wiring conduit 19 passes through the outer shell 2 to improve the stability of the wiring conduit 19 after installation.

[0045] It should be noted that after the cable is connected inside the wiring conduit 19, filler needs to be injected inside the wiring conduit 19 to avoid gaps between the wiring conduit 19 and the cable, thereby improving the sealing effect of the switch cabinet 3.

[0046] like Figure 1 and Figure 7As shown, in order to facilitate the inspection and maintenance of the parts inside the side cavity 6 and the equipment cavity 8, side doors 9 are symmetrically hinged on both sides of the back of the outer shell 2. The side doors 9 are horizontal "L" shaped structures to facilitate the inspection and maintenance of the parts inside the side cavity 6 and the equipment cavity 8.

[0047] like Figure 1 and Figure 9 As shown, the front end of the switch cabinet 3 extends through the front surface of the outer shell 2. The front surface of the outer shell 2 is hinged to a front door 5 on one side of the switch cabinet 3. A sealing gasket is provided on the inside of the front door 5 for the inspection and maintenance of the electrical components inside the switch cabinet 3.

[0048] like Figure 9 As shown, in order to facilitate the viewing of the working status of the electrical components inside the switch cabinet 3, an observation window is provided on the front surface of the front door 5, and a temperature and humidity sensor for monitoring the temperature and humidity inside the switch cabinet 3 is installed on the front door 5.

[0049] When in use (working), start the fan 12, and the fan 12, main air duct 14, branch air duct 20 and second telescopic pipe 42 will realize ventilation inside the air box 13. The setting of the air window 18 will accelerate the air flow inside the switch cabinet 3, which will help the heat dissipation inside the switch cabinet 3.

[0050] When a fire occurs inside the switch cabinet 3, the smoke flows with the airflow inside the switch cabinet 3 into the bellows 13, where the fire is detected by the smoke sensor 32. Additionally, the heat-sealed film 43 on the airbag 24 ruptures due to heat, releasing carbon dioxide from inside the airbag 24 for initial fire control. As the gas escapes from the airbag 24, the air pressure at the piston 51 towards the end connected to the air pipe 48 decreases, creating a pressure difference between the two ends of the piston 51. This causes the piston 51 to move towards the end connected to the air pipe 48, thus moving the insertion rod 47 and separating it from the insertion hole 49. This unlocks the drive shaft 25, releasing the potential energy of the compressed spring 44 to drive the drive shaft 25 to rotate. The drive shaft 25 then drives the first bevel gear 27 to rotate. The meshing between the first bevel gear 27 and the second bevel gear 28 causes the transmission shaft 26 to rotate, which in turn drives the third bevel gear 40 to rotate. The meshing with the fourth bevel gear 41 causes the driven shaft 37 to rotate with the fourth bevel gear 41. The driven shaft 37 drives the worm gear 38 to rotate. The meshing between the worm gear 38 and the worm wheel 39 causes the connecting shaft 34 to rotate, which in turn drives the closing plate 35 to rotate, thereby adjusting the angle of the closing plate 35. This keeps the inside of the switch cabinet 3 in a relatively sealed state, preventing continuous oxygen input. In addition, the controller 22 opens the solenoid valve 31, connecting the branch pipe 30. This allows the heptafluoropropane inside the heptafluoropropane fire extinguisher 15 to enter the switch cabinet 3 through the first telescopic pipe 17, the connecting pipe 16, and the branch pipe 30, thus extinguishing the fire inside the switch cabinet 3 and reducing economic losses. The fireproof plate 7 isolates the switch cabinet 3 from the battery 21 and the controller 22, preventing the fire from affecting the operation of the battery 21 and the controller 22. This facilitates the controller 22's feedback on the fire and the independent power supply to the battery 21, improving the stability of the fire response.

[0051] In addition, by setting up branch pipes 30 and solenoid valves 31, smoke monitoring and fire extinguishing can be carried out separately for each electrical equipment room, thereby reducing accidental injury to areas without fire during fire extinguishing and minimizing economic losses.

[0052] Furthermore, during equipment inspection and maintenance, the front door 5 facilitates the inspection and maintenance of electrical components inside the switch cabinet 3, the side doors 9 on both sides facilitate the inspection and maintenance of parts inside the side cavity 6 and equipment cavity 8, and the cabinet door 11 facilitates the inspection and maintenance of the top cabinet 10, thereby facilitating the maintenance of the heptafluoropropane fire extinguisher 15 and improving the practicality of the equipment.

Claims

1. An integrated fireproof high and low voltage switchgear, comprising a base (1) and an outer shell (2) mounted on the upper surface of the base (1), characterized in that, Also includes: The switch cabinet (3) is fixed inside the outer shell (2), and a fireproof board (7) is fixed on the back side of the switch cabinet (3). The gap between the switch cabinet (3) and the side wall of the outer shell (2) forms a side cavity (6). A partition (4) is provided at equal intervals from top to bottom inside the switch cabinet (3) so that the internal space of the switch cabinet (3) forms several electrical equipment rooms. A safety airbag (24) is provided at the bottom of the electrical equipment room. A hot melt film (43) is evenly provided on the safety airbag (24), and the safety airbag (24) is filled with carbon dioxide gas. A fire extinguishing nozzle (23) is provided at the top of the electrical equipment room. A heptafluoropropane fire extinguisher (15) is installed above the switch cabinet (3). The heptafluoropropane fire extinguisher (15) and the fire extinguishing nozzle (23) are connected by a pipeline, and a solenoid valve (31) is also provided between the heptafluoropropane fire extinguisher (15) and the fire extinguishing nozzle (23). Air vents (18) are symmetrically arranged on both sides of the electrical equipment room to accelerate the airflow inside the electrical equipment room. An air box (13) is detachably connected to the outside of the air vents (18). A closing component is provided inside the air box (13). The closing assembly includes a mounting frame (33) fixed inside the bellows (13), and a connecting shaft (34) is rotatably mounted at equal intervals on the inner side of the mounting frame (33). A closing plate (35) is fixed on the connecting shaft (34). When the closing plate (35) is parallel to the axial direction of the mounting frame (33), the mounting frame (33) is in a closed state. The mounting frame (33) has a transmission cavity (36) at its lower end away from the windshield (18), and the lower end of the connecting shaft (34) extends into the transmission cavity (36) and is equipped with a worm gear (39). The bellows (13) has a driven shaft (37) rotatably mounted inside, and the driven shaft (37) is provided with a worm (38) that meshes with the worm wheel (39). The inner side of the outer casing (2) is provided with a transmission assembly for driving the worm gear (38) to rotate synchronously, the transmission assembly including: The drive shaft (25) is rotatably mounted on the bottom of the outside of the switch cabinet (3), and both ends of the drive shaft (25) extend into the side cavity (6) and are equipped with the first bevel gear (27). The drive shaft (26) is rotatably mounted in the side cavity (6), and a second bevel gear (28) that meshes with the first bevel gear (27) is fixedly sleeved near the lower end of the drive shaft (26). A third bevel gear (40) is fixedly sleeved on the outside of the drive shaft (26) near the wind box (13). One end of the driven shaft (37) passes through the wind box (13) and is equipped with a fourth bevel gear (41) that meshes with the third bevel gear (40). The bottom of the switch cabinet (3) is fixed with a fixed bracket (52) that is rotatably connected to the drive shaft (25). A spring spring (44) is provided on the outside of the drive shaft (25). One end of the spring spring (44) is connected to the fixed bracket (52), and the other end of the spring spring (44) is fixed on the drive shaft (25). A connecting plate (45) is provided on the outside of the drive shaft (25) on one side of the spring spring (44). A socket (49) is provided on the connecting plate (45). The bottom of the switch cabinet (3) is fixed with a cylinder (46), and a piston (51) is slidably connected inside the cylinder (46). One end of the piston (51) passes through the cylinder (46) and is fitted with a plug rod (47). The plug rod (47) is inserted into the plug hole (49) to lock the rotation of the drive shaft (25). The other end of the cylinder (46) is connected to the airbag (24) with a connecting air pipe (48). Among them, the air pressure at both ends of the piston (51) is the same, and the air pressure at both ends of the piston (51) is greater than atmospheric pressure.

2. The integrated fireproof high and low voltage switchgear according to claim 1, characterized in that: Also includes: Smoke sensor (32), the smoke sensor (32) is located inside the air box (13) at the airflow output end of the electrical equipment room; The gap between the back of the fireproof plate (7) and the back of the outer shell (2) forms the equipment cavity (8). The battery (21) is located inside the equipment cavity (8), and a controller (22) is installed on one side of the battery (21). The signal input terminal of the controller (22) is electrically connected to the signal output terminal of the smoke sensor (32), and the signal output terminal of the controller (22) controls the operation of the solenoid valve (31) and the closing assembly.

3. An integrated fireproof high and low voltage switchgear according to claim 2, characterized in that: The upper end of the outer shell (2) is fixed with a top cabinet (10), and the lower surface of the top cabinet (10) is provided with a fitting groove (29) that fits into the outer shell (2), and the front surface of the top cabinet (10) is hinged with a cabinet door (11). The heptafluoropropane fire extinguisher (15) is located inside the top cabinet (10). A connecting pipe (16) is installed on the outside of the switch cabinet (3). One end of the connecting pipe (16) extends into the inside of the top cabinet (10) and is equipped with a first telescopic pipe (17). The first telescopic pipe (17) is connected to the output end of the heptafluoropropane fire extinguisher (15). A branch pipe (30) connected to the fire extinguishing nozzle (23) is installed on the outside of the connecting pipe (16). The solenoid valve (31) is installed on the branch pipe (30) to control the connection and disconnection of the branch pipe (30).

4. An integrated fireproof high and low voltage switchgear according to claim 3, characterized in that: The equipment cavity (8) is symmetrically equipped with main air ducts (14), and the upper end of the main air ducts (14) penetrates the side wall of the top cabinet (10) and is equipped with a fan (12). A branch duct (20) is installed on the outside of the main duct (14). A second telescopic pipe (42) that penetrates the fireproof board (7) is fixed at the other end of the branch duct (20). The other end of the second telescopic pipe (42) extends into the air box (13).

5. An integrated fireproof high and low voltage switchgear according to any one of claims 1-4, characterized in that: The switch cabinet (3) has a wiring pipe (19) on the back side. One end of the wiring pipe (19) passes through the fireproof board (7) and the outer shell (2) in sequence and is connected to a limit nut by a thread. The outer shell (2) has side doors (9) symmetrically hinged on both sides of the back. The side doors (9) are horizontal "L" shaped structures.

6. An integrated fireproof high and low voltage switchgear according to claim 5, characterized in that: The front end of the switch cabinet (3) extends through the front surface of the outer shell (2). The front surface of the outer shell (2) is hinged to a front door (5) that is compatible with it on one side of the switch cabinet (3). A sealing gasket is provided on the inner side of the front door (5).

7. An integrated fireproof high and low voltage switchgear according to claim 6, characterized in that: The front door (5) has an observation window on its front surface, and a temperature and humidity sensor for monitoring the temperature and humidity inside the switch cabinet (3) is installed on the front door (5).

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