A distribution box line protection device and fire protection method that is conducive to later maintenance

Abstract

The present invention provides a distribution box line protection device and a fire protection method that are convenient for later maintenance, and relates to the technical field of distribution boxes. The device comprises a distribution box body, a protective gate, a lifting assembly, and a fireproof bag assembly; a wiring board is provided in the distribution box body; heat dissipation windows are provided on both side panels and the back panel of the distribution box body, and the protective gate is liftably provided on the outside of the distribution box body; the wiring board is supported on a rotating hanging plate in the distribution box body by a fixed hanging plate; the fireproof bag assembly comprises a lifting frame body and a fireproof bag, and the lifting assembly comprises a lifting drive mechanism and two vertically arranged lifting screws. The beneficial effects of the present invention are as follows: the distribution box line protection device can close the heat dissipation window of the distribution box through the protective gate immediately after a fire occurs, and can also use the fireproof bag to isolate the fire component, and perform a closed and buried fire extinguishing on the fire component in combination with a jet fire extinguisher, thereby improving the success rate of fire extinguishing, shortening the fire time, and reducing fire losses.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution boxes, and in particular to a distribution box line protection device and a fire protection method which are convenient for later maintenance. Background Art

[0002] Distribution boxes, as core equipment for power distribution and control, are widely used in industrial, commercial, and residential areas. They contain components (circuit breakers, fuses, relays, etc.) and a large number of connecting wires. These internal components may generate heat during operation, so heat dissipation windows are typically required to dissipate the heat. Distribution boxes are typically located within distribution rooms, which often contain multiple distribution boxes for distributing power to different areas. During long-term operation, distribution boxes can easily pose a fire risk due to problems such as aging lines, short circuits, or overloads.

[0003] Patent document CN201310467823.0 discloses a highly flame-retardant, fire-proof and heat-dissipating distribution box. When a fire occurs, carbon dioxide is directly injected into the distribution box to directly cut off the fire burning environment, ensuring that the volume or concentration of carbon dioxide in the inner box cannot burn. At the same time, there is a serpentine tube in the middle space between the outer shell and the inner box. The outside of the serpentine tube is connected to a compressor. The operation of the compressor reduces the temperature of the middle space between the outer shell and the inner box, thereby achieving the purpose of rapid fire extinguishing.

[0004] The technical solution in the aforementioned patent document cannot seal the heat dissipation window of the distribution box, and it cannot solve the problem of flames and heat spreading to the outside through the heat dissipation window when the distribution box catches fire. When a fire occurs inside a distribution box in the distribution room, the flames or high temperature can easily spread rapidly through the heat dissipation window to the rest of the distribution equipment in the distribution room. This can make the fire in the distribution room difficult to control, causing huge fire losses and affecting the power supply of the entire area. In addition, when a fire occurs outside the distribution box, it is usually necessary to cut off the power to all distribution boxes, resulting in the impact of the distribution boxes in the entire area.

[0005] In addition, the electrical components and connection lines of the existing distribution box are all required to be inside the distribution box. During the later maintenance of the distribution box, a large number of parts often need to be disassembled, which increases the difficulty and time cost of maintenance.

[0006] Therefore, there is an urgent need for a distribution box line protection device that can effectively prevent fire and facilitate later maintenance to improve the safety and maintainability of the distribution box. Summary of the Invention

[0007] In view of this, the present invention provides a distribution box line protection device which is convenient for later maintenance. The distribution box line protection device of the present invention can isolate the distribution box as soon as a fire occurs inside the distribution box, and can also use fireproof bags to isolate the fire components, and use a jet fire extinguisher to perform a closed and buried fire extinguishing on the fire components to avoid affecting external power distribution equipment; at the same time, when a fire occurs outside the distribution box, the distribution box is quickly isolated, so that the distribution box that has not caught fire is not affected by the fire and can work normally, thereby comprehensively reducing the impact of the fire in the distribution room on the regional power supply.

[0008] The present invention provides a distribution box line protection device that is convenient for later maintenance and includes a distribution box body, a protection gate plate, a lifting assembly and a fireproof bag assembly;

[0009] A wiring board is provided in the distribution box;

[0010] Both side panels and the back panel of the distribution box are provided with heat dissipation windows. The protective gate is escalably arranged on the outside of the distribution box. The distribution box is also provided with a gate trigger assembly, and the top of the protective gate is fixed to the gate trigger assembly.

[0011] The inner walls of both side panels of the distribution box are provided with rotating hanging plates, and fixed hanging plates are provided on both sides of the wiring board, and the fixed hanging plates are supported on the two rotating hanging plates;

[0012] The fireproof bag assembly includes a lifting frame and a fireproof bag. The fireproof bag has an open upper end and a closed bottom. The open end of the fireproof bag is fixed to the lifting frame. Threaded sleeves are fixed on both sides of the lifting frame.

[0013] The lifting assembly includes a lifting drive mechanism and two vertically arranged lifting screws. The lifting drive mechanism is connected to the two lifting screws. The two lifting screws pass through the two threaded sleeves respectively. The lifting drive mechanism drives the lifting screws to rotate, driving the lifting frame to rise to touch the gate trigger assembly to make the protective gate descend to close all heat dissipation windows, and make the fireproof bag put the wiring board inside it.

[0014] Furthermore, the inner wall of the protective gate is provided with a fixing hole, and the gate trigger assembly includes a gate fixing module, a trigger module and a rotating connecting rod, and the middle portion of the rotating connecting rod is rotatably connected to the inner wall of the distribution box;

[0015] The gate fixing module includes a fixing sleeve and a fixing slider, the fixing sleeve is fixed to the side plate of the distribution box body, the fixing slider is slidably arranged in the fixing sleeve, and a latch rod and a release rod are respectively provided at both ends of the fixing slider, the latch rod is inserted into the fixing hole, and the release rod is rotatably connected to the upper end of the rotating connecting rod;

[0016] The trigger module includes a trigger seat and a trigger protrusion. The trigger seat is provided with a sliding trigger hole. The trigger protrusion is slidably arranged in the sliding trigger hole. The tail of the trigger protrusion is rotatably connected to the lower end of the rotating connecting rod.

[0017] Furthermore, the gate trigger assembly also includes a first elastic member and a second elastic member, the two ends of the first elastic member respectively abut against the tail of the trigger protrusion and the trigger seat, and the second elastic member respectively abuts against the bottom of the fixed sleeve and the bottom of the fixed slider.

[0018] Furthermore, a fixed support plate is provided on the outer wall of the distribution box body, and the fixed support plate is used to support the protective gate plate after it is lowered.

[0019] Furthermore, the lifting drive mechanism includes a driving motor, two synchronous pulleys and two synchronous transmission belts, the two synchronous pulleys are respectively fixed to the upper ends of the lifting screw, and the synchronous transmission belts are connected to the two synchronous pulleys;

[0020] The driving motor is fixedly arranged on the top of the distribution box, and the output shaft of the driving motor is connected to one of the lifting screws.

[0021] Furthermore, it also includes a jet fire extinguisher, which includes a fire extinguisher, a jet pump and a jet pipe. The fire extinguisher is fixed on the top of the distribution box, and the fire extinguisher is connected to the jet pipe through a connecting hose. The jet pump is arranged on the connecting hose, and the jet pipe is fixed directly above the wiring board. A plurality of jet ports are provided at the bottom of the jet pipe.

[0022] Furthermore, a rotating mounting seat is provided on the inner wall of the distribution box, a limiting support plate is provided at the bottom of the rotating mounting seat, the rotating hanging plate is rotatably connected to the rotating mounting seat through a hinged rod, an oblique groove is provided at the end of the rotating hanging plate, and the fixed hanging plate is limitedly supported in the oblique groove.

[0023] Furthermore, it also includes a sensor assembly and a fire protection controller, the sensor assembly includes a mounting shell and an internal temperature sensor and an external temperature sensor, the mounting shell is embedded in the inner wall of the side plate of the distribution box body, an insulation board is provided inside the mounting shell, the insulation board divides the internal cavity of the mounting shell into an inner cavity and an outer cavity, the internal temperature sensor and the external temperature sensor are fixed in the inner cavity and the outer cavity respectively,

[0024] The internal temperature sensor and the external temperature sensor are both connected to a fire protection controller, and the fire protection controller is connected to the drive motor and the jet pump.

[0025] The present invention also provides a fire protection method for a distribution box line protection device that is convenient for later maintenance. The fire protection method includes the above-mentioned distribution box line protection device, and the protection method comprises the following steps:

[0026] S1: Detecting the fire status of the distribution box through a temperature sensor, where the fire status includes no fire, fire outside the distribution box, and fire inside the distribution box;

[0027] If no fire occurs, maintain the original state;

[0028] If a fire occurs outside the distribution box, proceed to step S2;

[0029] If a fire occurs inside the distribution box, then execute steps S2, S3;

[0030] S2: The lifting drive mechanism drives the threaded sleeve to rise a certain distance to trigger the gate trigger assembly, causing the protective gate to fall and close all heat dissipation windows;

[0031] S3: The lifting drive mechanism drives the threaded sleeve to continue to rise, so that the threaded sleeve drives the lifting frame and the fireproof bag to move upward. During the upward movement, the lifting frame drives the rotating hanging plate to rotate, releasing the support of the rotating hanging plate on the fixed hanging plate, so that the wiring board falls into the fireproof bag.

[0032] Furthermore, step S3 further includes step S31, which is performed after the wiring board falls into the fireproof bag;

[0033] S31: The jet fire extinguisher sprays fire extinguishing material into the upper opening of the fireproof bag from above, so that the fire extinguishing material covers the wiring board.

[0034] The beneficial effects of the distribution box line protection device and fire protection method of the present invention, which are conducive to later maintenance, are as follows:

[0035] (1) When a fire occurs inside the distribution box, the lifting drive mechanism of the distribution box line protection device can drive the two lifting screws to connect, and the two lifting screws pass through the two threaded sleeves respectively. The lifting drive mechanism drives the lifting screws to rotate, driving the threaded sleeves and the lifting frame to rise. During the rising process, the threaded sleeves can release their support for the protective gate by touching the gate trigger assembly, so that the protective gate descends and closes all heat dissipation windows, so that the distribution boxes in the distribution room are isolated from each other, preventing the distribution box fire from spreading to other distribution boxes; at the same time, the lifting frame rises and can be automatically wrapped with fireproof bags. The wiring board that caught fire is sealed in an isolation layer. At the same time, the jet fire extinguisher on the top of the wiring board can spray fire extinguishing materials into the fireproof bag from the inside. The fire extinguishing material can cover the wiring board in the fireproof bag as a whole, ensuring that the components and connecting lines on the wiring board that caught fire can be extinguished efficiently and accurately, thereby improving the success rate of fire extinguishing, thereby effectively limiting the scope of the fire and reducing fire losses. At the same time, when a fire occurs outside the distribution box, the distribution box that is not on fire only releases the protective gate to isolate the distribution box, ensuring that the distribution box in the distribution room that is not on fire can work normally, and reducing the impact of the fire in the distribution room on the regional power supply.

[0036] (2) The components and connecting lines in the distribution box circuit protection device are installed on the wiring board, wherein the wiring board supports the fixed hanging plate on the wiring board through the rotating hanging plate, so that the wiring board can be stably installed in the distribution box by its own weight. When the components and connecting lines in the distribution box need to be repaired, the wiring board and the components and connecting lines installed on the wiring board can be removed as a whole without disassembling the overall structure, which can facilitate the subsequent maintenance of the distribution box and significantly improve maintenance efficiency. In addition, the rotating hanging plate structure of the distribution box circuit protection device can also ensure that the lifting frame can push the rotating hanging plate to rotate relative to the rotating mounting seat during the lifting process, release the support of the rotating hanging plate on the fixed hanging plate, and allow the wiring board to fall into the fireproof bag. The wiring board and the rotating hanging plate structure of the present invention can not only facilitate the maintenance of the distribution box, but also facilitate the fire isolation of the wiring board.

[0037] (3) The sensor assembly of the distribution box line protection device includes an internal temperature sensor and an external temperature sensor. The sensor assembly can sense the fire status inside and outside the distribution room. When a fire occurs outside the distribution box, only the protective gate descends to close the heat dissipation window. When a fire occurs inside the distribution box, the protective gate closes the heat dissipation window while the fireproof bag rises to isolate the wiring board and extinguish the fire on the wiring board. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the overall structure of a distribution box line protection device that is convenient for later maintenance according to an embodiment of the present invention.

[0039] Figure 2 A side view of a distribution box line protection device that facilitates later maintenance according to an embodiment of the present invention.

[0040] Figure 3 Schematic diagram of the internal structure of a distribution box body of a distribution box line protection device that is convenient for later maintenance according to an embodiment of the present invention (the door structure of the distribution box body is not shown).

[0041] Figure 4 yes Figure 3 A magnified view of center.

[0042] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0043] Figure 6 An internal structural diagram of a fixed sleeve of a distribution box line protection device that facilitates later maintenance according to an embodiment of the present invention.

[0044] Figure 7 A top view of a lifting frame of a distribution box line protection device that facilitates later maintenance according to an embodiment of the present invention.

[0045] Figure 8 A schematic diagram of the installation structure of a rotating hanging plate and a fixed hanging plate of a line protection device for a distribution box that facilitates later maintenance according to an embodiment of the present invention.

[0046] Figure 9 A flow chart of a fire protection method for a distribution box line protection device that facilitates later maintenance in an embodiment of the present invention.

[0047] In the above figure: 100-distribution box, 101-heat dissipation window, 102-fixed support plate, 103-slide plate, 200-protective gate, 201-slide rail groove, 202-fixed seat; 300-trigger seat, 301-trigger protrusion, 302-first elastic member, 310-rotating connecting rod, 311-bar hole, 400-fixed sleeve, 401-fixed slider, 402-release rod, 403-latch rod, 404-second elastic member, 500-wiring board, 501-rotating mounting seat, 502-limiting support plate, 503-rotating hanging plate, 504-fixed hanging plate, 505-oblique groove, 600-drive motor, 601-lifting screw, 602-synchronous pulley, 603-synchronous transmission belt, 700-fireproof bag, 701-lifting frame, 702-threaded sleeve; 800-fire extinguisher, 801-injection pipe, 802-connecting hose, 803-injection pump, 900-installation shell, 901-insulation board, 902-external temperature sensor, 903-internal temperature sensor. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0049] Please refer to Figures 1 to 8 The present invention provides a distribution box line protection device that is convenient for later maintenance, comprising a distribution box body 100, a protection gate plate 200, a lifting assembly, a fireproof bag assembly, and a jet fire extinguisher;

[0050] The distribution box 100 is a rectangular box with an openable door. A wiring board 500 is provided inside the distribution box 100. The electrical components and connecting lines used to perform the power distribution function are fixedly installed on the wiring board 500. Wire entry and exit holes are provided on the upper part of the distribution box 100, and the connecting lines enter and exit the distribution box 100 through the wire entry and exit holes.

[0051] The two side panels and the back panel of the distribution box 100 are both provided with heat dissipation windows 101, and the three heat dissipation windows 101 are of equal height. The protective gate 200 can be raised and lowered on the outside of the distribution box 100, wherein the outer wall of the distribution box 100 is also fixed with a fixed support plate 102 and a slide plate 103, wherein the fixed support plate 102 is located below the heat dissipation window 101, and the slide plate 103 is vertically fixed to the outer wall of the distribution box 100. The protective gate 200 is provided with a slide groove 201 at both ends, and the slide plate 103 is slidably engaged in the slide groove 201, so that the protective gate 200 can be raised and lowered and slid along the slide plate 103 on the outside of the distribution box 100. In this embodiment, the protective gate 200 is a metal plate coated with a fireproof and heat-insulating layer. The protective gate 200 has good fireproof and heat-insulating properties.

[0052] The distribution box 100 is also provided with a gate trigger assembly, and the top of the protective gate 200 is supported on the gate trigger assembly; when the distribution box 100 is working normally, the protective gate 200 is located above the heat dissipation window 101 and does not block the heat dissipation window 101, thereby ensuring the heat dissipation function of the distribution box 100.

[0053] The inner walls of both side panels of the distribution box 100 are provided with rotating hanging plates 503, and fixed hanging plates 504 are provided on both sides of the wiring board 500, and the fixed hanging plates 504 are supported on the rotating hanging plates 503; this allows the wiring board 500 to be stably suspended and fixed in the distribution box 100.

[0054] Specifically, two rotating mounting brackets 501 are provided on both sides of the inner wall of the distribution box 100, i.e., there are four rotating mounting brackets 501. A limiting support plate 502 is provided at the bottom of each rotating mounting bracket 501. A rotating hanging plate 503 is rotatably connected to the rotating mounting bracket 501 via a hinged rod. The limiting support plate 502 is used to support the rotating hanging plate 503, ensuring that the rotating hanging plate 503 can only rotate upward, not downward. The ends of the rotating hanging plates 503 are provided with inclined grooves 505. There are also four fixed hanging plates 504. Each fixed hanging plate 504 has a supporting slope at its end, which is supported in the inclined grooves 505 by the supporting slope. This allows the wiring board 500 to be suspended within the distribution box by its own weight. Furthermore, during maintenance and inspection, the wiring board 500 can be moved up a certain distance and then removed from the rotating hanging plate 503 as a whole, which facilitates the overall inspection of the wiring board 500.

[0055] The fire bag assembly includes a lifting frame 701 and a fire bag 700. Made of the same material as a fire blanket (e.g., woven fiberglass), the fire bag 700 acts as a barrier to heat and flames. The fire bag 700 is open at the top and closed at the bottom. The open end of the fire bag 700 is secured to the lifting frame 701, which has threaded sleeves 702 fixed to its sides. The lifting frame 701 is a rectangular structure and is located directly below the wiring board 500.

[0056] The lifting assembly includes a lifting drive mechanism and two vertically arranged lifting screws 601. The lifting drive mechanism is connected to the two lifting screws 601. The two lifting screws 601 pass through the two threaded sleeves 702 respectively. The lifting drive mechanism is used to drive the two lifting screws 601 to rotate synchronously, thereby driving the two threaded sleeves 702 and the lifting frame 701 connected to the threaded sleeves 702 to rise and fall synchronously.

[0057] The jet fire extinguisher includes a fire extinguisher 800, a jet pump 803, and a jet pipe 801. The fire extinguisher 800 is fixed to the top of the distribution box 100 and connected to the jet pipe 801 via a connecting hose 802. The jet pump 803 is mounted on the connecting hose 802. The jet pipe 801 is fixed directly above the wiring board 500 and has multiple jet ports at its bottom. The fire extinguisher 800 contains fire extinguishing material, and the jet pump 803 is used to spray the fire extinguishing material downward from the jet ports of the jet pipe 801 to extinguish fires on the electrical components and connecting lines on the wiring board 500. The fire extinguishing material can be dry powder or a mixture of dry powder and carbon dioxide.

[0058] When a fire occurs outside the distribution box, the lifting drive mechanism drives the threaded sleeve 702 to rise. During the rising process, the threaded sleeve 702 triggers the gate trigger assembly, which releases the support for the protective gate 200, causing the trigger gate to slide down along the slide plate 103 until the lower part of the protective gate 200 is supported on the fixed support plate 102; at this time, the protective gate 200 completely closes all the heat dissipation windows 101, which can effectively prevent the flames outside the distribution box from extending into the distribution box, thereby ensuring the safety of electrical components and connecting lines in the distribution box.

[0059] When a fire occurs inside the distribution box (i.e., the electrical components and connecting lines on the wiring board 500 are on fire), the lifting drive mechanism drives the threaded sleeve 702 and the lifting frame to continue to rise to the top of the distribution box. At this time, the lifting frame will drive the fireproof bag 700 to insert the wiring board 500 and the electrical components and connecting lines fixed thereon into the fireproof bag 700, thereby isolating and enclosing the burning components within the fireproof bag 700 to prevent further flames from spreading. At this time, the jet fire extinguisher, including the fire extinguishing pump, is activated, and the fire extinguishing material stored in the fire extinguisher 800 is sprayed from the jet fire extinguisher on the top of the wiring board 500 into the fireproof bag 700. The fire extinguishing material can completely cover the wiring board 500 inside the fireproof bag 700, ensuring that the fire area can be extinguished efficiently and accurately, greatly improving the success rate of fire extinguishing, thereby effectively limiting the scope of the fire and reducing fire losses. It is understandable that when the external fire is large, the temperature inside the distribution box is too high, causing the electrical components and connecting lines in the distribution box to malfunction. The fire extinguishing process of the fireproof bag 700 and the jet fire extinguisher will also be executed, so that the electrical components and connecting lines that have not caught fire can be protected in the fireproof bag 700 to prevent them from being damaged by high temperature.

[0060] It can be understood that during the rising process of the lifting frame 701, the side of the lifting frame 701 can lift the rotating hanging plate 503 upward, causing the rotating hanging plate 503 to rotate upward, thereby releasing the support of the rotating hanging plate 503 on the wiring board 500, ensuring that the rotating hanging plate 503 and the supporting structure of the rotating hanging plate 503 will not affect the rising of the lifting frame 701, so that the fireproof bag 700 can put the wiring board 500 into it (that is, after the lifting frame 701 releases the support of the upper rotating hanging plate 503 on the wiring board 500, the wiring board 500 falls into the fireproof bag 700). It should also be noted that in this embodiment, the width of the rotating hanging plate 503 and the fixed hanging plate 504 located at the bottom is smaller than the width of the rotating hanging plate 503 and the fixed hanging plate 504 located at the top. This ensures that when the lifting frame 701 releases the support of the lower rotating hanging plate 503 on the wiring board 500, the upper rotating hanging plate 503 will still play a limiting role on the fixed hanging plate 504 to prevent the wiring board 500 from tipping over.

[0061] The distribution box circuit protection device of the present invention can immediately isolate the distribution box after a fire occurs. It also uses fire-resistant bags 700 to isolate the burning components (components and connecting wiring on the wiring board 500). Combined with a jet fire extinguisher, it can extinguish the burning components in a sealed, buried manner. This improves the success rate of fire extinguishing, shortens the fire ignition time, and reduces fire losses. Furthermore, the wiring board 500 and rotating hanging plate 503 structure of the present invention facilitate both inspection and maintenance of the distribution box and conveniently isolate the wiring board 500 from fires.

[0062] In a preferred embodiment, the inner wall of the protective gate 200 is provided with a fixing seat 202, which is provided with a fixing hole. The gate trigger assembly includes a gate fixing module, a trigger module, and a rotating link 310. The middle portion of the rotating link 310 is rotatably connected to the inner wall of the distribution box 100. Specifically, the inner wall of the distribution box 100 is fixed with a hinged seat; the middle portion of the rotating link 310 is hinged to the hinged seat. The gate fixing module is fixed to the upper portion of the distribution box 100, and the trigger module is located at the lower portion of the distribution box 100.

[0063] The gate fixing module includes a fixing sleeve 400 and a fixing slider 401. The fixing sleeve 400 is fixed to the side panel of the distribution box 100 and passes through the side panel of the distribution box 100. The fixing slider 401 is slidably arranged in the fixing sleeve 400. The fixing slider 401 has a latch rod 403 and a release rod 402 at each end. The latch rod 403 is inserted into the fixing hole, thereby supporting the protective gate 200 on the gate trigger assembly. The release rod 402 is rotatably connected to the upper end of the rotating connecting rod 310.

[0064] The trigger module includes a trigger base 300 and a trigger bump 301. The trigger base 300 is provided with a sliding trigger hole, within which the trigger bump 301 slides. The rear end of the trigger bump 301 is rotatably connected to the lower end of the rotating link 310. The trigger bump 301 has an arcuate exterior. The rotating link 310 has strip-shaped holes 311 at both its upper and lower ends, each containing a sliding hinge. The rotating link 310 is rotatably connected to the release lever 402 and the rear end of the rotating trigger bump 301 via two sliding hinges.

[0065] When the lifting drive mechanism drives the threaded sleeve 702 to rise a certain distance, the outer wall of the threaded sleeve 702 can squeeze the trigger protrusion 301, causing the rotating link 310 to rotate around its middle, thereby driving the upper end of the rotating link 310 to pull the release rod 402 toward the inside of the distribution box 100, thereby pulling the latch rod 403 out of the fixing hole. At this time, the protective gate 200 falls under the action of its own gravity.

[0066] In a preferred embodiment, the gate trigger assembly further includes a first elastic member 302 and a second elastic member 404. The first elastic member 302 abuts against the rear end of the trigger bump 301 and the trigger seat 300 at both ends, while the second elastic member 404 abuts against the bottom of the fixed sleeve 400 and the bottom of the fixed slider 401, respectively. Both the first elastic member 302 and the second elastic member 404 are coil springs. These first and second elastic members 302 and 404 prevent the gate trigger assembly from being accidentally triggered.

[0067] In a preferred embodiment, the lifting drive mechanism includes a drive motor 600, two synchronous pulleys 602, and two synchronous transmission belts 603. The two synchronous pulleys 602 are respectively fixed to the upper ends of the lifting screws 601, and the synchronous transmission belts 603 connect the two synchronous pulleys 602. The drive motor 600 is fixedly mounted on the top of the distribution box 100, and the output shaft of the drive motor 600 is connected to one of the lifting screws 601. When the drive motor 600 is started and drives the connected lifting screw 601 to rotate, the synchronous transmission belt 603 can drive the other lifting screw 601 to rotate synchronously, thereby driving the two threaded sleeves to rise and fall synchronously.

[0068] In a preferred embodiment, the distribution box line protection device also includes a sensor assembly and a fire protection controller. The sensor assembly includes a mounting housing 900, an internal temperature sensor 903, and an external temperature sensor 902. The mounting housing 900 is embedded in the inner wall of the side panel of the distribution box 100. The mounting housing 900 is internally provided with a thermal insulation plate 901, which divides the internal cavity of the mounting housing 900 into an inner cavity and an outer cavity. The internal temperature sensor 903 and the external temperature sensor 902 are respectively fixed in the inner cavity and the outer cavity. The internal temperature sensor 903 and the external temperature sensor 902 are both connected to the fire protection controller, which is connected to the drive motor 600 and the jet pump 803.

[0069] The internal temperature sensor 903 and the external temperature sensor 902 respectively detect the internal and external temperatures of the distribution box 100. Both internal and external temperature sensors 903 and 902 are set to temperature thresholds. When the external or internal temperature exceeds the threshold, the internal or external temperature sensor 903 transmits fire information corresponding to the fire to the fire protection controller. When the internal temperature sensor 903 senses a temperature exceeding the threshold, it transmits internal fire information to the fire protection controller. When the external temperature sensor 902 senses a temperature exceeding the threshold, it transmits external fire information to the fire protection controller. Based on the received fire information, the fire protection controller controls the drive motor 600 and the jet pump 803 to perform corresponding fire protection actions.

[0070] refer to Figure 9 The present invention also provides a fire protection method for a distribution box line protection device that is convenient for later maintenance. The fire protection method uses the above-mentioned distribution box line protection device and comprises the following steps:

[0071] S1: Sense the fire status of the distribution box through the temperature sensors of the sensor assembly (internal temperature sensor 903 and external temperature sensor 902), where the fire status includes no fire, fire outside the distribution box, and fire inside the distribution box;

[0072] If no fire occurs, maintain the original state;

[0073] If a fire occurs outside the distribution box, proceed to step S2;

[0074] If a fire occurs inside the distribution box, then execute steps S2, S3;

[0075] It should be noted that when the external fire is large and the internal temperature of the distribution box exceeds the temperature threshold of the internal temperature sensor 903, the sensor component will also determine that a fire has occurred inside the distribution box.

[0076] S2: lifting drive mechanism drives the threaded sleeve 702 up a distance to trigger the gate assembly so that the protective gate 200 falls and closes all heat dissipation windows 101;

[0077] S3: The lifting drive mechanism drives the threaded sleeve 702 to continue to rise, so that the threaded sleeve 702 drives the lifting frame 701 and the fireproof bag 700 to move upward. During the upward movement, the lifting frame 701 drives the rotating hanging plate 503 to rotate, releasing the support of the rotating hanging plate 503 on the fixed hanging plate 504, so that the wiring board 500 falls into the fireproof bag 700.

[0078] In a preferred embodiment, step S3 further includes step S31, which is performed after the wiring board 500 falls into the fireproof bag 700;

[0079] S31: The jet fire extinguisher sprays fire extinguishing material from above into the upper opening of the fireproof bag 700 so that the fire extinguishing material covers the wiring board 500.

[0080] When a fire occurs in a distribution room, the fire protection method of the present invention can not only quickly extinguish the burning distribution box, but also isolate the unburned distribution boxes, preventing them from being affected by the fire and allowing them to operate normally, thereby ensuring that the remaining distribution boxes can operate normally, thereby minimizing the impact of the distribution room fire on the regional power supply. Specifically, when the fire is relatively small, the distribution box only closes the heat dissipation window 101 by lowering the protective gate 200. This does not affect the normal operation of the unburned distribution boxes, thus avoiding the occurrence of large-scale power outages. However, when the fire is relatively large or a fire occurs inside the distribution box, the wiring board 500 is wrapped with a fireproof bag 700 to achieve the effect of quickly and accurately extinguishing the fire or protecting electrical components and connecting lines.

[0081] In this document, directional terms such as front, back, top, and bottom are defined based on the positions of components in the accompanying drawings and relative to each other, and are intended only for clarity and convenience in describing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0082] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A distribution box line protection device that is convenient for later maintenance, characterized by: It comprises a power distribution box (100), a protective gate (200), a lifting assembly and a fireproof bag assembly; A wiring board (500) is provided in the power distribution box (100); Both side plates and the back plate of the distribution box (100) are provided with heat dissipation windows (101); the protective gate plate (200) is arranged on the outside of the distribution box (100) in a liftable manner; a gate plate trigger assembly is also provided on the distribution box (100); and the top of the protective gate plate (200) is fixed on the gate plate trigger assembly; The inner walls of both side plates of the distribution box (100) are provided with rotating hanging plates (503), and fixed hanging plates (504) are provided on both sides of the wiring board (500), and the two fixed hanging plates (504) are respectively supported on the two rotating hanging plates (503); The fireproof bag assembly comprises a lifting frame (701) and a fireproof bag (700), wherein the fireproof bag (700) is open at the upper end and closed at the bottom, the open end of the fireproof bag (700) is fixed on the lifting frame (701), and threaded sleeves (702) are fixed on both sides of the lifting frame (701); The lifting assembly includes a lifting drive mechanism and two vertically arranged lifting screws (601). The lifting drive mechanism is connected to the two lifting screws (601). The two lifting screws (601) respectively pass through the two threaded sleeves (702). The lifting drive mechanism drives the lifting screws (601) to rotate, driving the lifting frame (701) to rise to trigger the gate trigger assembly to make the protective gate (200) descend to close all the heat dissipation windows (101), and make the fireproof bag (700) cover the wiring board (500) therein.

2. A distribution box line protection device that facilitates later maintenance according to claim 1, characterized in that: The inner wall of the protective gate (200) is provided with a fixing hole, and the gate trigger assembly comprises a gate fixing module, a trigger module and a rotating connecting rod (310), and the middle portion of the rotating connecting rod (310) is rotatably connected to the inner wall of the distribution box (100); The gate fixing module comprises a fixing sleeve (400) and a fixing slider (401), wherein the fixing sleeve (400) is fixed to the side plate of the distribution box (100), and the fixing slider (401) is slidably arranged in the fixing sleeve (400), and a latch rod (403) and a release rod (402) are respectively provided at both ends of the fixing slider (401), wherein the latch rod (403) is inserted into the fixing hole, and the release rod (402) is rotatably connected to the upper end of the rotating connecting rod (310); The trigger module comprises a trigger seat (300) and a trigger protrusion (301); the trigger seat (300) is provided with a sliding trigger hole; the trigger protrusion (301) is slidably arranged in the sliding trigger hole; and the tail of the trigger protrusion (301) is rotatably connected to the lower end of the rotating connecting rod (310).

3. A distribution box line protection device that facilitates later maintenance according to claim 2, characterized in that: The gate trigger assembly further comprises a first elastic member (302) and a second elastic member (404), wherein two ends of the first elastic member (302) respectively abut against the tail of the trigger protrusion (301) and the trigger seat (300), and the second elastic member (404) respectively abuts against the bottom of the fixed sleeve (400) and the bottom of the fixed slider (401).

4. A distribution box line protection device that facilitates later maintenance according to claim 1, characterized in that: A fixed support plate (102) is further provided on the upper outer wall of the distribution box (100), and the fixed support plate (102) is used to support the protective gate plate (200) after it is lowered.

5. The distribution box line protection device that is convenient for later maintenance according to claim 1 is characterized in that: The lifting drive mechanism comprises a driving motor (600), two synchronous pulleys (602) and two synchronous transmission belts (603), wherein the two synchronous pulleys (602) are respectively fixed to the upper ends of the lifting screw (601), and the synchronous transmission belt (603) connects the two synchronous pulleys (602); The driving motor (600) is fixedly arranged on the top of the distribution box (100), and the output shaft of the driving motor (600) is connected to one of the lifting screws (601).

6. A distribution box line protection device that facilitates later maintenance according to claim 1, characterized in that: The invention also includes a jet fire extinguisher, which includes a fire extinguisher (800), a jet pump (803) and a jet pipe (801). The fire extinguisher (800) is fixed on the top of the distribution box (100). The fire extinguisher (800) and the jet pipe (801) are connected via a connecting hose (802). The jet pump (803) is arranged on the connecting hose (802). The jet pipe (801) is fixed directly above the wiring board (500). A plurality of jet ports are provided at the bottom of the jet pipe (801).

7. The distribution box line protection device that is convenient for later maintenance according to claim 1 is characterized in that: The inner wall of the distribution box (100) is provided with a rotating mounting seat (501), the bottom of the rotating mounting seat (501) is provided with a limiting support plate (502), the rotating hanging plate (503) is rotatably connected to the rotating mounting seat (501) through a hinged rod, the end of the rotating hanging plate (503) is provided with an oblique groove (505), and the fixed hanging plate (504) is limitedly supported in the oblique groove (505).

8. The distribution box line protection device that is convenient for later maintenance according to claim 6 is characterized in that: The invention also includes a sensor assembly and a fire protection controller, wherein the sensor assembly includes a mounting shell (900), an internal temperature sensor (903), and an external temperature sensor (902). The mounting shell (900) is embedded in the inner wall of the side plate of the distribution box (100). A thermal insulation board (901) is provided inside the mounting shell (900). The thermal insulation board (901) divides the internal cavity of the mounting shell (900) into an inner cavity and an outer cavity. The internal temperature sensor (903) and the external temperature sensor (902) are fixed in the inner cavity and the outer cavity respectively. The internal temperature sensor (903) and the external temperature sensor (902) are both connected to a fire protection controller, and the fire protection controller is connected to the drive motor (600) and the jet pump (803).

9. A fire protection method for a distribution box line protection device that is convenient for later maintenance, characterized in that: The fire protection method uses the distribution box line protection device that is convenient for later maintenance according to any one of claims 1 to 8, and the protection method comprises the following steps: S1: Detecting the fire status of the distribution box through a temperature sensor, where the fire status includes no fire, fire outside the distribution box, and fire inside the distribution box; If no fire occurs, maintain the original state; If a fire occurs outside the distribution box, proceed to step S2; If a fire occurs inside the distribution box, then execute steps S2, S3; S2: The lifting drive mechanism drives the threaded sleeve (702) to rise a certain distance to touch the gate trigger assembly, so that the protective gate (200) falls and closes all the heat dissipation windows (101); S3: The lifting drive mechanism drives the threaded sleeve (702) to continue to rise, so that the threaded sleeve (702) drives the lifting frame (701) and the fireproof bag (700) to move upward. During the upward movement, the lifting frame (701) drives the rotating hanging plate (503) to rotate, releasing the support of the rotating hanging plate (503) on the fixed hanging plate (504), so that the wiring board (500) falls into the fireproof bag (700).

10. A fire protection method for a distribution box line protection device that is convenient for later maintenance according to claim 9, characterized in that: Step S3 also includes step S31, and step S31 is performed after the wiring board (500) falls into the fireproof bag (700); S31: The fire extinguisher sprays fire extinguishing material from above into the upper opening of the fireproof bag (700), so that the fire extinguishing material covers the wiring board (500).

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