Low voltage distribution cabinet

Abstract

The present application relates to a low-voltage power distribution cabinet, comprising a cabinet body and a cabinet door rotatably arranged on the cabinet body, an installation cavity for installing power equipment is provided in the cabinet body, an exhaust cavity is also provided in the cabinet body, the exhaust cavity is connected with the installation cavity, a vent is provided on the cabinet body, an exhaust fan for heat dissipation is provided in the installation cavity, a top cover is also provided on the cabinet body, a plurality of drainage grooves are provided on the top cover, and the vent is located in the top cover; an air storage bag is also provided in the cabinet body, the air storage bag is filled with flame-retardant gas, a degassing component for releasing the flame-retardant gas in the air storage bag into the installation cavity is also provided in the cabinet body, a fixed cylinder is also provided on the top surface of the cabinet body, and the fixed cylinder cover is arranged outside the vent, a cover plate for closing the fixed cylinder is rotatably provided on the fixed cylinder, and an opening and closing component for driving the cover plate to flip so that the cover plate opens or closes the vent is provided on the fixed cylinder. The present application has good heat dissipation, good waterproof effect and the performance of being able to quickly extinguish fire, and is highly practical.

Description

Technical Field

[0001] The invention relates to the field of electric power distribution, and in particular to a low-voltage distribution cabinet. Background Art

[0002] The rated current of the low-voltage distribution cabinet is AC 50Hz, and the rated voltage is 380v. The distribution system is used for power, lighting and power distribution for power conversion and control. The product has the characteristics of strong breaking capacity, good dynamic thermal stability, flexible electrical scheme, convenient combination, strong series and practicality, and novel structure. The distribution cabinet is a massive parameter in data. Generally, it is required to assemble switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen to form a low-voltage distribution cabinet. During normal operation, the circuit can be connected or disconnected with the help of manual or automatic switches. The distribution cabinet is used to reasonably distribute electrical energy and facilitate the opening and closing operation of the circuit. It has a high level of safety protection and can intuitively display the conduction state of the circuit.

[0003] In the related art, a low-voltage distribution cabinet mainly includes a cabinet body and a cabinet door arranged on the cabinet body. An installation cavity for placing electrical equipment is provided in the cabinet body. Usually, a heat dissipation device is also provided in the cabinet body. The heat dissipation device includes an exhaust fan fixed in the cabinet body and a vent opened on the cabinet body, and the vent is connected to the installation cavity.

[0004] However, the low-voltage distribution cabinet in the related technology relies on vents and exhaust fans to dissipate heat from the low-voltage distribution cabinet, and the heat dissipation effect is poor; and because the low-voltage distribution cabinet is usually installed outdoors, rainwater can easily enter the installation cavity through the vents on rainy days, causing a short circuit in the line and causing line damage; in addition, because the low-voltage distribution cabinet is in a working state for a long time, overheating, spontaneous combustion or combustion problems caused by other reasons often occur, causing the entire low-voltage distribution cabinet to be burned, causing serious economic losses. Summary of the invention

[0005] In order to improve the poor heat dissipation effect of the low-voltage distribution cabinet in the related technology, and the phenomenon that rainwater easily enters the installation cavity from the ventilation holes on rainy days, causing line short circuit, resulting in line damage and the entire low-voltage distribution cabinet being burned when the low-voltage distribution cabinet catches fire, causing serious economic losses, the present application provides a low-voltage distribution cabinet.

[0006] The present application provides a low-voltage power distribution cabinet adopting the following technical solution:

[0007] A low-voltage power distribution cabinet, comprising a cabinet body and a cabinet door rotatably arranged on the cabinet body, wherein an installation cavity for installing power equipment is provided in the cabinet body, an exhaust cavity is also provided in the cabinet body, the exhaust cavity is communicated with the installation cavity, and the installation cavity is accommodated in the exhaust cavity, a vent is provided on the cabinet body, the vent is communicated with the exhaust cavity, an exhaust fan for heat dissipation is arranged in the installation cavity, a top cover is also provided on the cabinet body, a plurality of drainage grooves are arranged on the top cover, and the vent is located in the top cover; an air storage bag is also provided in the cabinet body, and the air storage bag is filled with There is flame-retardant gas, and the cabinet is also provided with a deflation component for releasing the flame-retardant gas in the air storage bag into the installation cavity. The top surface of the cabinet is also provided with a fixed cylinder, the fixed cylinder is located at the vent, and the fixed cylinder cover is provided outside the vent. A cover plate for closing the fixed cylinder is rotatably provided on the fixed cylinder, and the cover plate can be flipped relative to the fixed sleeve toward the direction close to or away from the opening of the fixed sleeve. The fixed cylinder is provided with an opening and closing component for driving the cover plate to flip toward the direction close to or away from the opening of the fixed sleeve so as to make the cover plate open or close the vent.

[0008] By adopting the above technical scheme, when the temperature in the installation cavity of the power equipment increases with the increase of working time, the exhaust fan is driven to rotate so that the hot air with higher temperature in the installation cavity is blown into the exhaust cavity, and the hot air is discharged from the vent to the outside of the cabinet through the exhaust cavity, so that the temperature in the installation cavity is reduced, and the heat dissipation effect of the cabinet is better. When it rains, the top cover and the drainage groove are set to block the rain outside the cabinet, so that the rain is not easy to accumulate on the top surface of the cabinet, avoiding the phenomenon of power equipment failure caused by rain entering the cabinet through the vent. When the power equipment in the installation cavity catches fire due to aging of the line caused by long-term work, the cover plate is driven to flip through the opening and closing component to close the vent, so that the outside air is not easy to enter the cabinet through the vent, and the deflation component is used to release the flame-retardant gas in the air storage bag, so that the flame-retardant gas can be isolated from oxygen, so that the power equipment stops burning, which greatly protects other unburned power equipment and reduces economic losses. Compared with the low-voltage power distribution cabinet in the related art, the present application drives the exhaust fan to rotate, so that the hot air with a higher temperature in the installation cavity is blown into the exhaust cavity and then discharged to the outside of the cabinet through the vent, and the heat dissipation effect is better. And through the setting of the top cover and the drainage groove, it is not easy for rainwater to enter the cabinet through the vent on rainy days, avoiding the phenomenon of electrical equipment failure caused by rainwater entering the cabinet. When the electrical equipment in the installation cavity catches fire, the vent is closed by the opening and closing component, so that the outside air is not easy to enter the cabinet, and the deflation component is used to release the flame-retardant gas in the air storage bag, so that the flame-retardant gas prevents the electrical equipment from burning, so that the flame can be extinguished quickly, which greatly protects other unburned electrical equipment and reduces economic losses.

[0009] Preferably, a partition plate for separating the installation cavity and the exhaust cavity is fixedly provided in the cabinet body, a mounting groove is provided on the partition plate, the mounting groove passes through the top surface of the partition plate, and the exhaust fan is fixedly provided in the mounting groove, and exhaust ports are respectively provided on two opposite side walls of the partition plate, the two exhaust ports are arranged opposite to each other, and both of the two exhaust ports are located on the lower side of the partition plate.

[0010] By adopting the above technical solution, when dissipating heat, the exhaust fan is driven to rotate so that the hot air with a higher temperature in the installation cavity is blown to the lower side of the partition plate, so that the hot air enters the exhaust cavity through the exhaust port, and is discharged out of the cabinet through the vent. At the same time, the outside air enters the installation groove through the vent through the installation groove, forming air convection, and the hot air in the installation cavity can be discharged more quickly, so that the temperature in the installation cavity is not easy to be too high, and the heat dissipation effect of the cabinet is better.

[0011] Preferably, the air storage bag is located in the installation cavity, and the air storage bag is located on the side of the partition plate facing the bottom of the cabinet, and a fixing component for fixing the air storage bag is provided in the cabinet.

[0012] By adopting the above technical solution, the gas storage bag is located on the side of the partition plate facing the cabinet, so that when the deflation component releases the flame-retardant gas in the gas storage bag, the flame-retardant gas can quickly fill the entire installation cavity under the action of gravity, thereby quickly extinguishing the fire.

[0013] Preferably, the fixing assembly includes a half hoop rotatably arranged on the top surface of the partition plate, a first magnet arranged on the free end of the half hoop, and a second magnet arranged on the partition plate. The half hoop is located on the side of the partition plate facing the bottom of the cabinet, and the half hoop is sleeved outside the air storage bag.

[0014] By adopting the above technical solution and utilizing the cooperation between the half hoop and the first magnet and the second magnet on the half hoop, it is easier to install and replace the air storage bag.

[0015] Preferably, the first magnet is provided with a protrusion, and the second magnet is provided with a groove for snap-fitting with the protrusion.

[0016] By adopting the above technical solution, the snap-fitting cooperation between the protrusion and the groove makes the connection between the first magnet and the second magnet more stable, so that the storage bag can be stably fixed on the partition plate and is not easy to fall off.

[0017] Preferably, the deflation assembly includes an electromagnet fixedly arranged in the exhaust chamber, a third magnet arranged in the exhaust chamber, a piercing rod arranged on the third magnet, a through hole provided on the partition plate for inserting the piercing rod, and a piercing needle arranged on the piercing rod, the electromagnet is magnetically connected to the third magnet, the through hole penetrates the partition plate, and the through hole is located at the air storage bag, the end of the fixing rod away from the third magnet is inserted into the through hole and is used to abut against the side wall of the air storage bag, the piercing needle is fixedly arranged at the end of the fixing rod away from the third magnet, and an elastic member is provided in the exhaust chamber for providing elastic force to the third magnet so that the third magnet slides relative to the exhaust chamber toward the direction close to the through hole.

[0018] By adopting the above technical solution, when the electrical equipment in the installation cavity catches fire, the power supply in the cabinet is disconnected, causing the electromagnet to lose its magnetism. When the elastic member continues to provide elastic force to the third magnet, the electromagnet separates from the third magnet, so that the fixing rod is inserted into the through hole and abuts against the side wall of the air storage bag, so that the needle on the fixing rod punctures the air storage bag, and then releases the flame-retardant gas in the air storage bag into the installation cavity, thereby achieving the effect of rapid fire extinguishing.

[0019] Preferably, the elastic member comprises a spring, one end of the spring is fixedly connected to the electromagnet, and the other end of the spring is fixedly connected to the third magnet.

[0020] By adopting the above technical solution, when the electromagnet is energized, the electromagnet is tightly adsorbed to the third magnet, and the spring is in a compressed state. When a fire occurs in the installation cavity, the power supply in the cabinet is disconnected, and the electromagnet loses its magnetism. At this time, the third magnet is vertically raised and lowered relative to the exhaust cavity under the action of the spring, so that the fixing rod is inserted into the perforation and moves toward the direction close to the air storage bag, so that the needle punctures the air storage bag to release the flame-retardant gas.

[0021] Preferably, the opening and closing assembly includes a connecting rod hinged to the top surface of the partition plate, a circular hole opened on the cabinet body, and a vertical rod for plugging into the circular hole. The center of the connecting rod is hinged to the partition plate, and one end of the connecting rod is located directly below the third magnet. The circular hole passes through the top surface of the cabinet body, and the circular hole is connected to the exhaust chamber. The vertical rod is vertically arranged, one end of the vertical rod is hinged to the cover plate, and the end of the vertical rod away from the cover plate is inserted into the circular hole and then hinged to the connecting rod.

[0022] By adopting the above technical solution, when the electrical equipment in the installation cavity catches fire, the power supply in the cabinet is automatically disconnected, causing the electromagnet to lose its magnetism. At this time, the third magnet is vertically lifted and lowered relative to the partition plate under the action of the spring. During the descent of the third magnet, one end of the connecting rod is driven to descend synchronously, causing the other end of the connecting rod to rise relative to the partition plate, thereby driving the vertical rod to rise relative to the partition plate, and then driving the cover plate to flip relative to the fixed sleeve in the direction close to the fixed cylinder, thereby achieving the effect of closing the fixed cylinder, that is, closing the vent, so that outside air is not easily able to enter the cabinet.

[0023] Preferably, a sealing gasket is provided on the cover plate, and the sealing gasket is arranged along the circumferential direction of the cover plate, and a snap-in groove for snap-fitting with the sealing gasket is provided on the fixing cylinder.

[0024] By adopting the above technical solution, the sealing gasket cooperates with the clamping groove, so that when the cover plate is covered on the top surface of the fixed tube, the sealing inside the fixed tube is better, that is, the sealing inside the cabinet is better, so that the outside air is not easy to enter the cabinet.

[0025] Preferably, a dustproof net is provided at the ventilation opening, and the dustproof net is arranged along the circumferential direction of the ventilation opening.

[0026] By adopting the above technical solution, the dustproof net is set to prevent external dust from easily entering the fixed sleeve, that is, external dust from easily entering the cabinet, thereby avoiding the situation where dust accumulates in the cabinet and causes poor heat dissipation effect of the cabinet.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The present application drives the exhaust fan to discharge the hot air with a relatively high temperature in the installation cavity out of the cabinet through the exhaust cavity and the heat dissipation port. At the same time, the outside air enters the installation cavity through the exhaust port and the installation slot, forming air convection, so that the heat dissipation of the cabinet is better. The top cover and the drainage slot are provided to block rainwater outside the cabinet, thus avoiding the situation where the power equipment in the installation cavity fails due to rainwater entering the cabinet through the exhaust port. Moreover, when the power equipment in the installation cavity catches fire, the present application closes the vents through the opening and closing group, making it difficult for the outside air to enter the cabinet. At the same time, the flame-retardant gas in the air storage bag is released through the air release component, so that the flame is quickly extinguished, which protects the power equipment to a great extent and reduces economic losses.

[0029] 2. In the present application, when the electric equipment catches fire, the power supply in the cabinet is automatically disconnected, so that the cover plate is closed on the fixed sleeve, thereby isolating the outside air outside the cabinet. At the same time, the electromagnet loses its magnetism, and the third magnet is lifted and lowered relative to the exhaust chamber toward the perforation under the action of the spring, so that the end of the fixed rod extends out of the perforation and moves toward the direction of the air storage bag, so that the piercing rod pierces the air storage bag and releases the flame-retardant gas in the air storage bag, thereby allowing the flame-retardant gas to isolate the air in the installation cavity, thereby achieving the effect of rapid fire extinguishing, protecting the electric equipment to a great extent, and reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of this implementation;

[0031] Figure 2 It is a schematic diagram of the local structure with the top cover removed;

[0032] Figure 3 It is a schematic diagram for reflecting the matching relationship between the installation cavity, the exhaust cavity and the partition plate;

[0033] Figure 4 It is a schematic diagram used to reflect the coordination relationship between the exhaust fan and the vent;

[0034] Figure 5 yes Figure 4 A partial display diagram from another perspective;

[0035] Figure 6 yes Figure 5 A magnified view of part A;

[0036] Figure 7 2 is a schematic diagram of the structure when the cover plate is closed in this embodiment;

[0037] Figure 8 yes Figure 7 Magnified view of part B.

[0038] Explanation of the accompanying drawings: 1. base; 2. cabinet; 3. cabinet door; 4. observation port; 5. handle; 6. top cover; 7. drainage groove; 8. installation cavity; 9. exhaust cavity; 10. partition plate; 11. exhaust port; 12. ventilation port; 13. installation groove; 14. exhaust fan; 15. dust screen; 16. air storage bag; 17. half hoop; 18; first magnet; 19. second magnet; 20. protrusion; 22. electromagnet; 23. third magnet; 24. fixing rod; 25. needle; 26. accommodating groove; 27. spring; 28. fixing cylinder; 29. ​​cover plate; 30. sealing gasket; 32. connecting rod; 33. lifting seat; 34. vertical rod; 35. clearance groove; 36. cross rod; 37. strip groove; 38. hinge shaft; 39. slide groove; 40. guide rod; 41. limit ring. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-8 This application is described in further detail.

[0040] A low voltage distribution cabinet, referring to Figure 1 and Figure 2 , comprising a base 1, a cabinet body 2 arranged on the base 1, and a cabinet door 3 rotatably arranged on the cabinet body 2, wherein the cabinet body 2 is arranged in a rectangular parallelepiped shape, and one side of the cabinet body 2 is arranged in an open shape, and the cabinet door 3 is rotatably arranged on the cabinet body 2 through a hinge, and the cabinet door 3 is located at the opening of the cabinet body 2. An observation port 4 is opened on the cabinet door 3, and the observation port 4 passes through the cabinet door 3. The observation port 4 is arranged in a cubic shape, and a transparent glass is fixedly arranged at the observation port 4. In addition, a handle 5 is also arranged on the cabinet door 3 for facilitating the pulling of the cabinet door 3.

[0041] Reference Figure 1 and Figure 2 The top surface of the cabinet 2 is covered with a top cover 6, which is arranged in a herringbone shape and fixedly arranged on the top surface of the cabinet 2. A plurality of oblique drainage grooves 7 are provided on each side of the top cover 6, and the plurality of oblique drainage grooves 7 are evenly distributed along the width direction of the top cover 6.

[0042] Reference Figure 2 and Figure 3 The cabinet 2 is provided with an installation cavity 8 for installing electric equipment, and the installation cavity 8 is provided in a rectangular parallelepiped shape. The cabinet 2 is also provided with an exhaust cavity 9, and the exhaust cavity 9 is connected with the installation cavity 8, and the installation cavity 8 is accommodated in the exhaust cavity 9. The cabinet 2 is provided with a partition plate 10 for separating the installation cavity 8 from the exhaust cavity 9. The cross section of the partition plate 10 is provided in a U-shaped configuration, and the opening of the partition plate 10 faces the bottom of the cabinet 2. The two side walls of the partition plate 10 are respectively provided with exhaust ports 11, and the two exhaust ports 11 are arranged opposite to each other, and the two exhaust ports 11 are both located at the lower side of the partition plate 10.

[0043] Reference Figure 3 and Figure 4The cabinet 2 is also provided with a vent 12, which is circular and located on the top surface of the cabinet 2, and the vent 12 is connected with the exhaust cavity 9. The partition plate 10 is provided with a mounting groove 13, which penetrates the top surface of the partition plate 10, and the mounting groove 13 is opposite to the vent 12. An exhaust fan 14 for heat dissipation is provided in the installation cavity 8, and the exhaust fan 14 is fixedly installed in the mounting groove 13. In addition, a dustproof net 15 is also provided at the vent 12, and the dustproof net 15 is arranged along the circumferential direction of the vent 12, and the dustproof net 15 cover is fixedly installed in the vent 12. When working, the exhaust fan 14 blows the hot air with higher temperature in the installation cavity 8 from top to bottom from the bottom of the installation cavity 8, and the hot air enters the exhaust cavity 9 through the exhaust port 11 on the partition plate 10, and is discharged from the vent 12 through the exhaust cavity 9. At the same time, the outside air enters the installation groove 13 through the vent 12 and the installation groove 13, forming air convection, so that the hot air in the installation groove 13 is easier to be discharged, and then the heat dissipation effect in the cabinet 2 is better, so that the power equipment can work stably in the installation cavity 8.

[0044] Reference Figure 5 and Figure 6 , the cabinet 2 is also provided with an air storage bag 16, which is located in the installation cavity 8, and the air storage bag 16 is located on the side of the partition plate 10 facing the bottom of the cabinet 2. The air storage bag 16 is filled with a flame-retardant gas. In this embodiment, the flame-retardant gas filled in the air storage bag 16 is nitrogen. In other embodiments, the air storage bag 16 can be filled with other inert gases or other gases that can hinder the combustion of objects. A fixing component for fixing the air storage bag 16 in the installation cavity 8 is provided in the cabinet 2.

[0045] Reference Figure 5 and Figure 6In this embodiment, there are two groups of fixing components, which are symmetrically arranged at both ends of the air storage bag 16, and the two groups of fixing components cooperate to fix the air storage bag 16 on the partition plate 10. Specifically, the fixing components include a half hoop 17 rotatably arranged on the top surface of the partition plate 10, a first magnet 18 arranged on the free end of the half hoop 17, and a second magnet 19 arranged on the partition plate 10, wherein the half hoop 17 is arranged in a semicircular ring shape, the half hoop 17 is located on the side of the partition plate 10 facing the bottom of the cabinet 2, and the half hoop 17 is sleeved outside the air storage bag 16, one end of the half hoop 17 is fixedly arranged on the partition plate 10 by bolts, and the other end of the half hoop 17 can be flipped around the bolts relative to the partition plate 10 in a direction close to or away from the partition plate 10, that is, the free end of the half hoop 17 can be flipped around the bolts relative to the partition plate 10 in a direction close to or away from the partition plate 10. The first magnet 18 and the second magnet 19 are both arranged in a rectangular parallelepiped shape, the first magnet 18 is provided with a protrusion 20, and the second magnet 19 is provided with a groove (not shown in the figure) for engaging with the protrusion 20. The two sets of half hoops 17 are fitted on both ends of the air storage bag 16, and the air storage bag 16 can be stably fixed on the partition plate 10 under the magnetic force of the first magnet 18 and the second magnet 19 and the engaging engagement of the protrusion 20 and the groove.

[0046] Reference Figure 5 and Figure 6 The cabinet 2 is also provided with a deflation assembly for releasing the flame-retardant gas in the gas storage bag 16 into the installation cavity 8. In this embodiment, there are two groups of deflation assemblies, which are symmetrically arranged on one side of the partition plate 10 away from the gas storage bag 16.

[0047] Specifically, refer to Figure 5 and Figure 6 The deflation component includes an electromagnet 22 fixedly disposed in the exhaust chamber 9, a third magnet 23 disposed in the exhaust chamber 9, a fixing rod 24 disposed on the third magnet 23, a through hole opened on the partition plate 10 for inserting the fixing rod 24, and a piercing needle 25 disposed on the piercing rod. Among them, the electromagnet 22 is fixedly installed on the inner wall of the cabinet 2, the third magnet 23 is located above the partition plate 10, and the electromagnet 22 is magnetically connected to the third magnet 23 and is fixed vertically. The fixing rod 24 is fixedly set on the side of the third magnet 23 facing the partition plate 10. The perforation is vertically set, and the perforation passes through the top surface of the partition plate 10. The two ends of the perforation are respectively connected to the exhaust groove and the installation groove 13, and the perforation is located at the air storage bag 16. The fixing rod 24 is plugged into the perforation. The end of the fixing rod 24 away from the third magnet 23 is inserted into the perforation to abut the side wall of the air storage bag 16. The needle 25 is vertically set, and the needle 25 is fixedly set on the end of the fixing rod 24 away from the third magnet 23.

[0048] Reference Figure 5 and Figure 6 The exhaust chamber 9 is also provided with an elastic member for providing elastic force to the third magnet 23 so that the third magnet 23 can be lifted and lowered relative to the partition plate 10 toward the direction close to the partition plate 10. Specifically, the elastic member includes a receiving groove 26 provided on the third magnet 23 and a spring 27 provided in the receiving groove 26. The receiving groove 26 is vertically provided and is located on the side of the third magnet 23 facing the electromagnet 22. One end of the spring 27 is fixedly connected to the electromagnet 22, and the other end of the spring 27 is fixedly connected to the receiving groove 26. When the electrical equipment in the installation cavity 8 catches fire, the power supply in the cabinet 2 is disconnected, the electromagnet 22 loses its magnetism, and the third magnet 23 drops vertically toward the direction close to the partition plate 10 under the elastic force of the spring 27, driving the fixing rod 24 to move toward the direction close to the air storage bag 16 after being inserted into the perforation and abutting against the side wall of the air storage bag 16, so that the puncture needle 25 pierces the air storage bag 16, and then releases the flame-retardant gas in the air storage bag 16 into the installation cavity 8, thereby achieving the effect of quickly extinguishing the fire.

[0049] Reference Figure 7 and Figure 8 A fixing tube 28 is also provided on the top surface of the cabinet 2 . The fixing tube 28 is provided in a cylindrical shape with a hollow interior. The fixing tube 28 is located inside the top cover 6 , and the fixing tube 28 is covered outside the vent 12 .

[0050] Reference Figure 7 and Figure 8 A cover plate 29 for closing the fixed cylinder 28 is rotatably provided on the fixed cylinder 28. The cover plate 29 is provided along the circumferential direction of the fixed cylinder 28, and the cover plate 29 can be flipped relative to the fixed cylinder 28 toward or away from the opening of the fixed cylinder 28. The cover plate 29 is also provided with a sealing gasket 30. The sealing gasket 30 is provided along the circumferential direction of the cover plate 29. A snap-fit ​​groove (not shown in the figure) for snap-fitting with the sealing gasket 30 is provided on the top surface of the fixed cylinder 28. Through the snap-fitting of the sealing gasket 30 and the snap-fit ​​groove, when the cover plate 29 is covered on the fixed cylinder 28, the sealing inside the fixed cylinder 28 is better, thereby making the sealing inside the cabinet 2 better.

[0051] Reference Figure 7 and Figure 8 The fixed cylinder 28 is provided with an opening and closing component for driving the cover plate 29 to flip toward or away from the opening of the fixed cylinder 28 so that the cover plate 29 opens or closes the vent 12.

[0052] Specifically, refer to Figure 7 and Figure 8The opening and closing assembly includes a connecting rod 32 hinged to the top surface of the partition plate 10, a lifting seat 33 hinged to one end of the connecting rod 32, a round hole provided on the cabinet 2, and a vertical rod 34 for plugging and matching with the round hole. The center of the connecting rod 32 is hinged to the partition plate 10, and a clearance groove 35 is provided on the connecting rod 32. The clearance groove 35 is located at the hinge of the connecting rod 32. One end of the connecting rod 32 is connected to a cross bar 36, and the end of the cross bar 36 away from the connecting rod 32 is located directly below the third magnet 23. The lifting seat 33 is arranged in a rectangular parallelepiped shape, and the lifting seat 33 can be vertically lifted and lowered relative to the partition plate 10. A strip groove 37 is provided on the lifting seat 33. The strip groove 37 is arranged along the length direction of the lifting seat 33. The strip groove 37 runs through the upper and lower surfaces of the lifting seat 33. One side of the strip groove 37 is opened, and a hinge shaft 38 is slidably arranged in the strip groove 37. The hinge shaft 38 is arranged along the width direction of the lifting seat 33. Two opposite side walls of the strip groove 37 are provided with sliding grooves 39 for the hinge shaft 38 to slide relative to the strip groove 37. The two ends of the hinge shaft 38 are respectively slidably connected to the two sliding grooves 39, and the end of the connecting rod 32 away from the cross bar 36 is rotatably connected to the hinge shaft 38. The circular hole is located on one side of the vent 12, passes through the top surface of the cabinet 2, and is connected to the exhaust chamber 9. The vertical rod 34 is vertically arranged, and one end of the vertical rod 34 is hinged to the cover plate 29. The end of the vertical rod 34 away from the cover plate 29 is inserted into the circular hole and then hinged to the center of the lifting seat 33. In this embodiment, the number of the connecting rod 32, the cross rod 36, the strip groove 37 and the hinge shaft 38 are all two groups, and the two groups of connecting rods, cross rods 36, strip grooves 37 and hinge shafts 38 cooperate to drive the two ends of the lifting seat 33 to rise and fall synchronously relative to the partition plate 10. When the electrical equipment in the installation cavity 8 catches fire, the power supply in the cabinet 2 is disconnected, the electromagnet 22 loses its magnetism, and the third magnet 23 rises and falls vertically relative to the partition plate 10 under the elastic force of the spring 27. The third magnet 23 drives the cross bar 36 to descend during the descent, and the cross bar 36 drives one end of the connecting rod 32 to descend synchronously, so that the end of the connecting rod 32 away from the cross bar 36 rises relative to the partition plate 10, thereby driving the lifting seat 33 to rise relative to the partition plate 10, and causing the vertical rod 34 to rise vertically relative to the partition plate 10, thereby driving the cover plate 29 to flip relative to the fixed sleeve toward the opening close to the fixed sleeve, thereby achieving the effect of closing the opening of the fixed sleeve, that is, closing the vent 12, so that the outside air is not easy to enter the cabinet 2.

[0053] Reference Figure 7 and Figure 8In addition, the lifting seat 33 is also provided with a guide assembly for guiding the lifting seat 33 to vertically lift relative to the partition plate 10. In this embodiment, the number of the guide assemblies is two groups, and the two groups of guide assemblies cooperate to guide the two ends of the lifting seat 33 to synchronously lift relative to the partition plate 10. Specifically, the guide assembly includes a through hole provided on the lifting seat 33, a guide rod 40 plugged into the through hole, and a limit ring 41 provided on the guide rod 40. The through hole passes through the upper and lower surfaces of the lifting seat 33, the insertion rod is vertically arranged, and one end of the insertion rod is fixedly connected to the top surface of the lifting seat 33 after passing through the through hole. The diameter of the limit ring 41 is larger than the diameter of the insertion rod, and the limit ring 41 is fixedly connected to the end of the insertion rod away from the partition plate 10.

[0054] The implementation principle of the present application is as follows: when the temperature in the installation cavity 8 increases due to the increase in the working time of the electrical equipment in the cabinet 2, the exhaust fan 14 is driven to rotate so that the exhaust fan 14 blows the hot air with a higher temperature in the installation cavity 8 to the lower side of the installation cavity 8, so that the hot air enters the exhaust cavity 9 through the exhaust port 11 and is discharged outside the cabinet 2 through the vent 12. At the same time, the outside air enters the installation cavity 8 through the installation groove 13 from the vent 12, forming more air convection, so that the hot air in the installation cavity 8 is more easily discharged outside the cabinet 2. When it rains outside, the top cover 6 blocks the rainwater outside the cabinet 2, so that the rainwater is not easy to enter the cabinet 2 through the vent 12, thereby avoiding the phenomenon of electrical equipment failure caused by rainwater entering the cabinet 2. When the electrical equipment in the installation cavity 8 catches fire due to line aging or other reasons, the power supply is automatically cut off, the electromagnet 22 loses its magnetism due to power failure, and the spring 27 continuously provides elastic force to the third magnet 23, so that the third magnet 23 is separated from the electromagnet 22, so that the third magnet 23 is vertically lifted relative to the partition plate 10 in the direction close to the partition plate 10, and then the fixing rod 24 is inserted into the perforation and extends into the installation cavity 8, so that the puncture needle 25 punctures the gas storage bag 16, and the flame-retardant gas in the gas storage bag 16 is released into the installation cavity 8. At the same time, the third magnet 23 is in the process of descending. During the process, the cross bar 36 is driven down, causing one end of the connecting rod 32 to descend relative to the partition plate 10, thereby causing the end of the connecting rod 32 away from the cross bar 36 to rise relative to the partition plate 10, causing the lifting seat 33 to rise relative to the partition plate 10 driven by the connecting rod 32, thereby driving the vertical rod 34 to rise relative to the partition plate 10, and then causing the cover plate 29 to flip toward the opening direction close to the fixed sleeve under the action of the vertical rod 34, and then closing the vent 12 to prevent outside air from entering the cabinet 2, thereby stopping the combustion of the electrical equipment, thereby achieving the effect of protecting the electrical equipment and reducing economic losses.

[0055] 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. A low-voltage power distribution cabinet, comprising a cabinet body (2) and a cabinet door (3) rotatably arranged on the cabinet body (2), wherein an installation cavity (8) for installing power equipment is provided in the cabinet body (2), characterized in that: The cabinet (2) is further provided with an exhaust cavity (9), the exhaust cavity (9) is communicated with the installation cavity (8), and the installation cavity (8) is accommodated in the exhaust cavity (9); the cabinet (2) is provided with a vent (12), the vent (12) is communicated with the exhaust cavity (9), an exhaust fan (14) for heat dissipation is arranged in the installation cavity (8); the cabinet (2) is further provided with a top cover (6), the top cover (6) is provided with a plurality of drainage grooves (7), and the vent (12) is located in the top cover (6); A partition plate (10) for separating the installation cavity (8) from the exhaust cavity (9) is fixedly arranged in the cabinet (2); a mounting groove (13) is provided on the partition plate (10); the mounting groove (13) penetrates the top surface of the partition plate (10); and the exhaust fan (14) is fixedly arranged in the mounting groove (13); exhaust ports (11) are respectively provided on two opposite side walls of the partition plate (10); the two exhaust ports (11) are arranged opposite to each other, and the two exhaust ports (11) are both located on the lower side of the partition plate (10); An air storage bag (16) is also provided in the cabinet (2), the air storage bag (16) being filled with flame-retardant gas, the air storage bag (16) being located in the installation cavity (8), and the air storage bag (16) being located on a side of the partition plate (10) facing the bottom of the cabinet (2), a fixing component for fixing the air storage bag (16) is provided in the cabinet (2), and a degassing component for releasing the flame-retardant gas in the air storage bag (16) into the installation cavity (8) is also provided in the cabinet (2); The number of the deflation components is two groups, and the two groups of deflation components are symmetrically arranged on a side of the partition plate (10) facing away from the air storage bag (16); The deflation assembly comprises an electromagnet (22) fixedly arranged in the exhaust cavity (9), a third magnet (23) arranged in the exhaust cavity (9), a piercing rod arranged on the third magnet (23), a through hole provided on the partition plate (10) for inserting the piercing rod, and a piercing needle (25) arranged on the piercing rod, the electromagnet (22) and the third magnet (23) are magnetically connected, the through hole passes through the partition plate (10), and the through hole is located at the air storage bag (16), an end of the fixing rod (24) away from the third magnet (23) is inserted into the through hole and is used to abut against the side wall of the air storage bag (16), the piercing needle (25) is fixedly arranged at an end of the fixing rod (24) away from the third magnet (23), and an elastic member is provided in the exhaust cavity (9) for providing elastic force to the third magnet (23) so as to make the third magnet (23) slide relative to the exhaust cavity (9) and move toward the through hole; The top surface of the cabinet (2) is further provided with a fixed cylinder (28), the fixed cylinder (28) being located at the ventilation opening (12), and the fixed cylinder (28) being covered outside the ventilation opening (12), a cover plate (29) for closing the fixed cylinder (28) being rotatably provided on the fixed cylinder (28), the cover plate (29) being capable of flipping relative to the fixed cylinder (28) in a direction close to or away from an opening of the fixed sleeve, and an opening and closing component for driving the cover plate (29) to flip in a direction close to or away from an opening of the fixed sleeve so as to enable the cover plate (29) to open or close the ventilation opening (12); The opening and closing assembly comprises a connecting rod (32) hinged to the top surface of the partition plate (10), a circular hole formed on the cabinet body (2), and a vertical rod (34) for plugging into and cooperating with the circular hole. The center of the connecting rod (32) is hinged to the partition plate (10), and one end of the connecting rod (32) is located directly below the third magnet (23). The circular hole passes through the top surface of the cabinet body (2), and the circular hole is connected to the exhaust chamber (9). The vertical rod (34) is arranged vertically, and one end of the vertical rod (34) is hinged to the cover plate (29). The end of the vertical rod (34) away from the cover plate (29) is inserted into the circular hole and then hinged to the connecting rod (32).

2. The low voltage distribution cabinet according to claim 1, characterized in that: The fixing assembly comprises a half hoop (17) rotatably arranged on the top surface of the partition plate (10), a first magnet (18) arranged on the free end of the half hoop (17), and a second magnet (19) arranged on the partition plate (10); the half hoop (17) is located on a side of the partition plate (10) facing the bottom of the cabinet (2), and the half hoop (17) is sleeved outside the air storage bag (16).

3. The low voltage distribution cabinet according to claim 2, characterized in that: The first magnet (18) is provided with a protrusion (20), and the second magnet (19) is provided with a groove for engaging with the protrusion (20).

4. The low voltage distribution cabinet according to claim 1, characterized in that: The elastic member comprises a spring (27), one end of the spring (27) is fixedly connected to the electromagnet (22), and the other end of the spring (27) is fixedly connected to the third magnet (23).

5. The low voltage distribution cabinet according to claim 1, characterized in that: A sealing gasket (30) is provided on the cover plate (29), and the sealing gasket (30) is arranged along the circumferential direction of the cover plate (29). A clamping groove for clamping and cooperating with the sealing gasket (30) is provided on the fixing cylinder (28).

6. The low voltage distribution cabinet according to claim 1, characterized in that: A dustproof net (15) is provided at the ventilation opening (12), and the dustproof net (15) is provided along the circumferential direction of the ventilation opening (12).

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