A distribution box with good protection

Abstract

The utility model provides a good protective distribution box belongs to distribution box technical field, in order to solve the problem that heat boundary layer effect is difficult to eliminate completely through increasing the rotation of exhaust fan or increasing the number of fan to enhance heat dissipation, the utility model discloses a box body, the inner wall of one side of box body is fixedly installed with a plurality of elastic components symmetry, a plurality of elastic components are collectively slidably sleeved with support assembly, and a plurality of elastic components and support assembly are clamped through a plurality of clamping components, the inner wall of one end of box body is fixedly installed with mounting bracket, and the side wall of mounting bracket is sealingly connected with elastic eardrum, the inner side wall of box body is fixedly installed with reciprocating component, the utility model breaks heat boundary layer through beating elastic eardrum vibration, enhances the disturbance, not only has strengthened the heat dissipation effect, and also has reduced the energy consumption.

Description

Technical Field

[0001] This invention relates to the field of distribution box technology, specifically to a distribution box with good protection. Background Technology

[0002] As an important terminal power distribution device in the power system, the distribution box is widely used in industrial, commercial and civil buildings. It contains power distribution mechanisms such as circuit breakers, contactors, relays and control circuits. During normal operation, the electrical components in the power distribution mechanism will continuously generate Joule heat and eddy current heat. If the heat cannot be dissipated in time, the temperature inside the box will continue to rise, which will not only accelerate the aging of insulation materials and reduce the service life of components, but may even cause malfunctions or fires. Therefore, the distribution box is usually equipped with air inlets and exhaust fans to form a cooling channel through forced convection to achieve heat dissipation.

[0003] However, the heat dissipation system of existing distribution boxes mostly relies on a single exhaust fan running continuously. Its airflow path is relatively fixed, which can easily form dead zones inside the box, especially in areas with dense electrical components, resulting in local heat accumulation and poor heat dissipation uniformity. When the ambient temperature rises or the load increases, heat dissipation is often enhanced by increasing the exhaust fan speed or the number of fans, but this significantly increases energy consumption and operating noise, and it is still difficult to completely eliminate the thermal boundary layer effect, resulting in limited improvement in heat dissipation efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a distribution box with good protection. By using this device, the problems mentioned above, such as increasing the speed of the exhaust fan or increasing the number of fans to enhance heat dissipation, which increases energy consumption and operating noise, and the difficulty in completely eliminating the thermal boundary layer effect, are solved.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a protective distribution box, comprising a box body and a door hinged to the box body; a plurality of mounting ears are fixedly installed on the top and bottom surfaces of the box body; an air inlet is embedded and fixedly installed on the outer wall of one side of the box body; a self-opening and closing exhaust fan is embedded and fixedly installed on the outer wall of the other side of the box body; a power distribution mechanism is fixedly installed on the inner wall of one end of the box body; a temperature sensor for monitoring temperature is fixedly installed on the side wall of the power distribution mechanism; and a plurality of elastic components are symmetrically fixedly installed on the inner wall of one side of the box body. A support component is slidably mounted on each elastic component, and several elastic components and the support component are connected by several snap-fit ​​components to form a support frame. A mounting bracket is fixedly installed on the inner wall of one end of the housing, and an elastic diaphragm is sealed and connected to the side wall of the mounting bracket. The power distribution mechanism, temperature sensor, elastic components, support components and snap-fit ​​components are all set in the space formed by the elastic diaphragm and the inner wall of the housing. A reciprocating component is fixedly installed on the inner side wall of the housing. The reciprocating component periodically beats the elastic diaphragm, and the elastic diaphragm periodically vibrates and breaks the thermal boundary.

[0006] Furthermore, the elastic component includes a limiting rod fixedly installed on the inner wall of one end of the housing, and a locking hole is provided on the circumferential side wall of the limiting rod.

[0007] Furthermore, the support assembly includes a frame, and the side wall of the frame facing the limiting rod is elastically connected to the inner wall of one side of the box by a spring. Several hollow sleeves are fixedly installed on the side wall of the frame facing the limiting rod. The outer circumference of the hollow sleeves is provided with mounting holes, and the diameter of the mounting holes is the same as that of the snap-fit ​​holes. A rubber pad is fixedly installed at the edge of the mounting hole opening.

[0008] Furthermore, the snap-fit ​​assembly includes a snap-fit ​​post that snaps into the interior of the mounting hole and the snap-fit ​​hole.

[0009] Furthermore, the elastic diaphragm includes a diaphragm that is sealed to the side wall of the mounting bracket, with an air inlet on one side of the outer wall of the diaphragm and an air outlet on the other side of the outer wall of the diaphragm.

[0010] Furthermore, the reciprocating assembly includes a mounting base fixedly installed on the inner side wall of the housing. The inner cavity of the mounting base has symmetrically opened sliding grooves on its circumferential side wall. A sliding column is slidably installed in both sliding grooves. A push plate is fixedly installed on the side wall of the sliding column facing the diaphragm. The sliding column and the mounting base are elastically connected by a spring. An electromagnet is fixedly installed on the vertical side wall of the inner cavity of the mounting base. A permanent magnet is fixedly installed on the side wall of the sliding column facing the electromagnet, and the electromagnet and the permanent magnet are aligned.

[0011] Furthermore, a protective distribution box also includes a winding assembly fixedly installed on the outer wall of the distribution mechanism. The winding assembly is connected to the locking post by a pull rope. A pair of fire extinguishing assemblies are symmetrically fixedly installed on the inner wall of the distribution mechanism, and a sealing assembly is provided on the inner wall of one side of the box.

[0012] Furthermore, the winding assembly includes a mounting plate fixedly installed on the outer wall of the power distribution mechanism. A sleeve is fixedly installed on the side wall of the mounting plate. A threaded groove is opened in the inner ring of the sleeve. A movable column is rotatably installed inside the sleeve. Several balls are rotatably installed on the outer circumference of the movable column. The balls are rolled inside the threaded groove. A rotating seat is rotatably installed on the side wall of the movable column facing the mounting plate. The side wall of the rotating seat and the side wall of the mounting plate are elastically connected by a spring. A winding reel is fixedly installed on the side wall of the movable column facing the frame. Several pull ropes are fixedly connected to the winding reel.

[0013] Furthermore, the fire extinguishing assembly includes a fire extinguishing tank that is fixedly installed on the inner wall of the power distribution mechanism, and a valve is rotatably installed on the side wall of the fire extinguishing tank.

[0014] Furthermore, the sealing assembly includes a fixed bracket that is fixedly installed on the inner wall of one side of the housing. Limiting grooves are respectively opened on two opposite side walls of the inner cavity of the fixed bracket. A sealing plate is slidably installed in the two limiting grooves. The side wall of the sealing plate is elastically connected to the side wall of the inner cavity of the fixed bracket by a spring four. A rubber gasket two is fixedly installed through the lower side wall of the sealing plate. A limiting sleeve is fixedly installed on the outer wall of one side of the box. The second rubber pad is concentrically set with the limiting sleeve, and the locking post penetrates the second rubber pad and is inserted into the limiting sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a reciprocating component to periodically beat the elastic diaphragm, causing it to vibrate and break the thermal boundary layer of the air inside the chamber. This enhances the air disturbance and heat dissipation effect of the internal cavity structure without significantly increasing the exhaust fan speed. It can eliminate heat dissipation dead zones, achieve uniform heat dissipation, and effectively reduce energy consumption.

[0016] 2. In the event of a fire, the shape memory alloy spring in this invention deforms under heat, driving the winding assembly to operate and pull out the locking pin. This causes the sealing assembly to quickly seal the air intake window under the force of the spring. At the same time, the exhaust fan blades automatically close after power is cut off, achieving the first layer of sealing inside the distribution box, effectively blocking external oxygen from entering and suppressing the spread of fire.

[0017] 3. After the locking pin is pulled out, the support frame in this invention moves towards the power distribution mechanism under the action of the spring force, causing the elastic diaphragm to directly contract and wrap around the surface of the power distribution mechanism, and triggering the opening of the fire extinguishing tank valve; the sprayed extinguishing agent is constrained by the elastic diaphragm and closely covers the ignition point, achieving precise fire extinguishing, avoiding the dispersion and waste of extinguishing agent, and significantly reducing the risk of reignition.

[0018] 4. This invention forms a second oxygen barrier layer by contracting and wrapping the elastic diaphragm, and at the same time, it forms a third layer of coverage and isolation by directional spraying of extinguishing agent in a sealed cavity. The triple protection works synergistically to greatly improve the sealing performance and fire extinguishing reliability of the distribution box in the event of a fire, and effectively prevent the reignition of smoldering parts. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional schematic diagram of the reciprocating component of the present invention; Figure 4 for Figure 3 Enlarged view of point A; Figure 5This is a schematic diagram showing the connection relationship between the snap-fit ​​assembly and the winding assembly of the present invention; Figure 6 for Figure 5 Enlarged view of point B; Figure 7 This is a schematic diagram showing the installation position of the self-opening and closing exhaust fan of the present invention; Figure 8 This is a schematic diagram showing the installation position of the limiting sleeve of the present invention; Figure 9 This is a spatial distribution diagram of the power distribution mechanism, mounting frame, and elastic diaphragm of the present invention; Figure 10 This is a disassembled schematic diagram of the elastic component and the support component of the present invention; Figure 11 This is a cross-sectional schematic diagram of the winding assembly of the present invention; Figure 12 for Figure 11 Enlarged view of point C; Figure 13 This is a schematic diagram showing the installation position of the sealing assembly of the present invention; Figure 14 for Figure 13 Enlarged view of point D.

[0020] In the diagram: 1. Enclosure; 11. Air inlet; 12. Limiting sleeve; 2. Enclosure door; 3. Mounting ear; 4. Power distribution mechanism; 5. Temperature sensor; 6. Elastic component; 61. Limiting rod; 62. Spring 1; 63. Locking hole; 7. Support component; 71. Frame; 72. Hollow sleeve; 73. Mounting hole; 74. Rubber pad 1; 8. Snap-fit ​​component; 81. Locking post; 82. Pull rope; 9. Mounting bracket; 10. Elastic diaphragm; 101. Diaphragm; 102. Air outlet; 103. Air inlet; 20. Reciprocating component; 201. Mounting base; 202. Slide groove; 203. Sliding column; 204. Push plate; 205. Spring II; 206. Electromagnet; 207. Permanent magnet; 30. Self-opening and closing exhaust fan; 40. Rewinding assembly; 401. Mounting plate; 402. Sleeve; 403. Threaded groove; 404. Moving column; 405. Ball bearing; 406. Rotating seat; 407. Spring III; 408. Rewinding reel; 50. Fire extinguishing assembly; 501. Fire extinguishing canister; 502. Valve; 60. Sealing assembly; 601. Fixing bracket; 602. Limiting groove; 603. Sealing plate; 604. Spring IV; 605. Rubber pad II. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 and Figure 2 As shown, a protective distribution box includes a box body 1 and a door 2 hinged to the box body 1. The box body 1 supports and fixes the internal components, while the door 2 isolates the internal components, preventing external debris from entering the box body 1. Several mounting ears 3 are fixedly installed on the top and bottom surfaces of the box body 1 for installing the entire distribution box in a designated location. An air inlet 11 is embedded and fixedly installed on one side of the outer wall of the box body 1, and a self-closing exhaust fan 30 is embedded and fixedly installed on the other side of the outer wall of the box body 1. Figure 5 As shown, a power distribution mechanism 4 is fixedly installed on the inner wall of one end of the enclosure 1. During operation, the power distribution mechanism 4 continuously generates heat. To ensure that the power distribution mechanism 4 maintains a good working condition, the controller inside the power distribution box will start the self-closing exhaust fan 30 to draw away the hot air inside the enclosure 1. Then, the outside cooling air will enter the enclosure 1 through the air inlet 11 to cool the power distribution mechanism 4, thus forming a cooling channel for continuous cooling of the power distribution mechanism 4. The controller is common knowledge to those skilled in the art, so it is not shown in the figure. A temperature sensor 5 for monitoring temperature is fixedly installed on the side wall of the power distribution mechanism 4 to monitor the internal temperature of the enclosure 1 in real time and realize temperature early warning.

[0023] To address the technical problems of heat dissipation dead zones and high energy consumption in existing distribution box heat dissipation methods, the following preferred technical solutions are provided: like Figure 5 and Figure 13 As shown, several elastic components 6 are symmetrically fixedly installed on the inner wall of one side of the housing 1. A support component 7 is slidably fitted onto these elastic components 6, and the elastic components 6 and the support component 7 are engaged by several snap-fit ​​components 8 to form a support frame. A mounting bracket 9 is fixedly installed on the inner wall of one end of the housing 1. An elastic diaphragm 10 is sealed to the side wall of the mounting bracket 9. The power distribution mechanism 4, temperature sensor 5, elastic components 6, support component 7, and snap-fit ​​components 8 are all arranged in the space formed by the elastic diaphragm 10 and the inner wall of the housing 1. Figure 2 and Figure 3 As shown, a reciprocating assembly 20 is fixedly installed on the inner wall of the housing 1. The reciprocating assembly 20 periodically beats the elastic diaphragm 10, and the elastic diaphragm 10 periodically vibrates and breaks the thermal boundary. Specifically, such as Figure 5 As shown, in the initial state, the elastic component 6 and the support component 7 are snapped together by the snap-fit ​​component 8 to form a support frame; since the mounting bracket 9 is still fixedly installed on the inner wall of one side of the housing 1, there is a distance difference between the mounting bracket 9 and the support component 7; since the elastic diaphragm 10 is sealed and connected to the side wall of the mounting bracket 9, under the support of the support frame, the elastic diaphragm 10 is expanded into a cavity structure, that is, the space formed by the elastic diaphragm 10 and the inner wall of the housing 1; the power distribution mechanism 4 will continuously generate heat during operation, and the temperature is monitored in real time by the temperature sensor 5; The technical solution in this application is as follows: When the temperature sensor 5 detects a continuous increase in temperature, it will transmit a signal to the controller. The controller will not prioritize increasing the speed of the self-opening and closing exhaust fan 30. While maintaining the original speed of the self-opening and closing exhaust fan 30, the controller intermittently powers the reciprocating component 20 to enable it to reciprocate. During the reciprocating motion, the reciprocating component 20 will periodically drive the elastic diaphragm 10 to vibrate. During the vibration of the elastic diaphragm 10, the air in its internal cavity structure will oscillate to break the thermal boundary and enhance the heat dissipation effect. If the temperature continues to rise, the controller will further increase the speed of the self-opening and closing exhaust fan 30 to enhance heat dissipation.

[0024] like Figure 5 , Figure 6 and Figure 10 As shown, the elastic component 6 includes a limiting rod 61 fixedly installed on the inner wall of one end of the housing 1, and a locking hole 63 is provided on the circumferential side wall of the limiting rod 61.

[0025] like Figure 10 As shown, the support assembly 7 includes a frame 71. The side wall of the frame 71 facing the limiting rod 61 is elastically connected to the inner wall of one side of the housing 1 by a spring 62. Several hollow sleeves 72 are fixedly installed on the side wall of the frame 71 facing the limiting rod 61. The outer circumference of the hollow sleeve 72 is provided with a mounting hole 73. The mounting hole 73 has the same diameter as the hole 63. A rubber pad 74 is fixedly installed at the edge of the opening of the mounting hole 73. During installation, the frame 71 is pulled to slide on the limiting rod 61. When the mounting hole 73 is aligned with the locking hole 63, the locking end of the locking component 8 is inserted into the mounting hole 73 and the locking hole 63 to achieve the locking effect. At this time, the multiple limiting rods 61 and the frame 71 form a support frame to support the elastic diaphragm 10 and expand it into a cavity structure.

[0026] like Figure 10 As shown, the snap-fit ​​assembly 8 includes a snap-fit ​​post 81, which snaps into the interior of the mounting hole 73 and the snap-fit ​​hole 63; the snap-fit ​​post 81 contacts the rubber pad 74, and the static friction between the two is large, preventing the snap-fit ​​post 81 from falling off during the snap-fit ​​process.

[0027] like Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the elastic diaphragm 10 includes a diaphragm 101 sealed to the side wall of the mounting frame 9. An air inlet 103 is provided on one side of the outer wall of the diaphragm 101, and an air outlet 102 is provided on the other side of the outer wall of the diaphragm 101. When multiple limiting rods 61 and the frame 71 form a support frame, they can support the diaphragm 101 and expand it into a cavity structure. Since the power distribution mechanism 4 is located in the cavity structure of the diaphragm 101, a large amount of heat is accumulated in the cavity structure of the diaphragm 101. At this time, the temperature sensor 5 transmits an electrical signal to the controller, and the controller starts the self-closing exhaust fan 30 to draw the heat accumulated in the cavity structure through the air outlet 102. At the same time, the outside cooling air enters the cavity structure through the air inlet 11 and the air outlet 103 to cool the power distribution mechanism 4, thereby forming a cooling channel to continuously cool the power distribution mechanism 4.

[0028] like Figure 3 and Figure 4 As shown, the reciprocating assembly 20 includes a mounting base 201 fixedly installed on the inner side wall of the housing 1. The inner cavity of the mounting base 201 has symmetrically provided sliding grooves 202 on the circumferential side wall. A sliding column 203 is slidably installed in both sliding grooves 202. A push plate 204 is fixedly installed on the side wall of the sliding column 203 facing the diaphragm 101. The sliding column 203 and the mounting base 201 are elastically connected by a spring 205. An electromagnet 206 is fixedly installed on the vertical side wall of the inner cavity of the mounting base 201. A permanent magnet 207 is fixedly installed on the side wall of the sliding column 203 facing the electromagnet 206, and the electromagnet 206 and the permanent magnet 207 are aligned.

[0029] Specifically, such as Figures 1-10 As shown, in the initial state, when the multiple limiting rods 61 and the frame 71 form a support frame, the diaphragm 101 can be supported and expanded into a cavity structure; the power distribution mechanism 4 will continuously generate heat during operation, and the temperature will be monitored in real time by the temperature sensor 5. In traditional heat dissipation methods, when the temperature sensor 5 detects a continuous rise in temperature, it sends a signal to the controller, which then increases the speed of the self-opening and closing exhaust fan 30 to enhance the heat dissipation effect. However, this method not only increases energy consumption but also creates heat dissipation dead zones, failing to achieve a relatively uniform heat dissipation effect. To improve the heat dissipation effect, it is necessary to increase the number of self-opening and closing exhaust fans 30 and change their arrangement, further increasing energy consumption. The technical solution in this application is as follows: When the temperature sensor 5 detects a continuous increase in temperature, it transmits a signal to the controller. The controller will not prioritize increasing the speed of the self-opening and closing exhaust fan 30. While maintaining the original speed of the self-opening and closing exhaust fan 30, when the controller energizes the electromagnet 206, the electromagnet 206 attracts the permanent magnet 207 and compresses the second spring 205, while simultaneously moving the sliding column 203 and the push plate 204 away from the diaphragm 101. When the electromagnet 206 is de-energized, the magnetic attraction disappears, and under the elastic force of the second spring 205, the sliding column 203 and the push plate 204 move away from the diaphragm 101. 204 is synchronously ejected towards the diaphragm 101, causing the pusher plate 204 to strike the diaphragm 101, thereby oscillating the air within the cavity structure. When the controller intermittently energizes the electromagnet 206, the slide column 203 and the pusher plate 204 can reciprocate periodically, periodically driving the diaphragm 101 to vibrate. During the vibration of the diaphragm 101, the air within its cavity structure oscillates, breaking the thermal boundary and enhancing the heat dissipation effect. If the temperature continues to rise, the controller further activates the self-closing exhaust fan 30 to enhance heat dissipation. When the power distribution mechanism 4 is running normally, the reciprocating component 20 does not need to operate continuously for a long time. It only needs to oscillate periodically at regular intervals to break the thermal boundary and enhance the heat dissipation effect. Compared with the traditional method of continuously increasing the speed of the self-opening and closing exhaust fan 30 to enhance heat dissipation, it has a good energy-saving effect while maintaining a good heat dissipation effect.

[0030] To address the technical problems of existing electrical distribution boxes having insufficient sealing performance in the event of a fire, making it easy for smoldering parts to reignite, and the inability to specifically cover the ignition point with extinguishing agents, which still easily leads to reignition, the following preferred technical solutions are provided: like Figure 5 , Figure 10 , Figure 11 and Figure 13 As shown, it also includes a winding assembly 40 fixedly installed on the outer wall of the power distribution mechanism 4. The winding assembly 40 is connected to the locking post 81 by a pull rope 82. A pair of fire extinguishing assemblies 50 are symmetrically fixedly installed on the inner wall of the power distribution mechanism 4. A sealing assembly 60 is provided on the inner wall of one side of the box 1. When a component on the power distribution mechanism 4 catches fire, the winding assembly 40 starts to rotate under high temperature. During the rotation of the winding assembly 40, the pull rope 82 pulls the locking pin 81 out of the mounting hole 73 and the locking hole 63. At this time, the locking effect disappears, and under the elastic force of the spring 62, the frame 71 moves towards the power distribution mechanism 4, directly covering the diaphragm 101 onto the power distribution mechanism 4. Since the diaphragm 101 has contraction properties, it further tightly wraps the diaphragm 101 around the power distribution mechanism 4, achieving the effect of isolating oxygen. In addition, during the movement of the frame 71 towards the power distribution mechanism 4, the fire extinguishing assembly 50 is triggered, causing the fire extinguishing agent inside to be sprayed out. Combined with the diaphragm 101, the fire extinguishing agent can tightly cover the fire point to achieve the purpose of extinguishing the fire.

[0031] like Figure 11 and Figure 12 As shown, the winding assembly 40 includes a mounting plate 401 fixedly installed on the outer wall of the power distribution mechanism 4. A sleeve 402 is fixedly installed on the side wall of the mounting plate 401. A threaded groove 403 is provided in the inner ring of the sleeve 402. A movable column 404 is rotatably installed inside the sleeve 402. Several balls 405 are rotatably installed on the outer circumference of the movable column 404. The balls 405 are rolled inside the threaded groove 403. A rotating seat 406 is rotatably installed on the side wall of the movable column 404 facing the mounting plate 401. The side wall of the rotating seat 406 and the side wall of the mounting plate 401 are elastically connected by a spring 407. A winding reel 408 is fixedly installed on the side wall of the movable column 404 facing the frame 71. Several pull ropes 82 are fixedly connected to the winding reel 408.

[0032] like Figure 5 and Figure 11 As shown, the fire extinguishing assembly 50 includes a fire extinguishing tank 501 fixedly installed on the inner wall of the power distribution mechanism 4, and a valve 502 is rotatably installed on the side wall of the fire extinguishing tank 501.

[0033] like Figure 8 and Figure 14 As shown, the sealing assembly 60 includes a fixing frame 601 fixedly installed on the inner wall of one side of the housing 1. Limiting grooves 602 are respectively opened on two opposite side walls of the inner cavity of the fixing frame 601. A sealing plate 603 is slidably installed in the two limiting grooves 602. The side wall of the sealing plate 603 is elastically connected to the side wall of the inner cavity of the fixing frame 601 by a spring 604. A rubber gasket 605 is fixedly installed through the lower side wall of the sealing plate 603. A limiting sleeve 12 is fixedly installed on the outer wall of one side of the housing 1. The second rubber pad 605 is concentrically set with the limiting sleeve 12. The locking post 81 is inserted into the limiting sleeve 12 through the second rubber pad 605. The purpose of setting the second rubber pad 605 is to increase the static friction between the second rubber pad 605 and the locking post 81 to prevent the locking post 81 from falling out of the limiting sleeve 12.

[0034] Specifically, such as Figure 5 , Figure 6 and Figures 10-14 As shown, in the initial state, the locking post 81 penetrates the rubber pad 605 and is inserted into the limiting sleeve 12 to limit the sealing plate 603, so that the air intake window 11 is in a passable state for heat dissipation. At the same time, the locking post 81 passes through the mounting hole 73 and the rubber pad 74 and is inserted into the inside of the locking hole 63 to limit the frame 71. This makes the multiple limiting rods 61 and the frame 71 form a support frame to support the elastic diaphragm 10 and expand it into a cavity structure. When a fire occurs in the power distribution mechanism 4, the closing mechanism in the power distribution mechanism 4 will trip instantly, causing the entire power distribution box to be in a power-off state. At this time, the self-opening and closing exhaust fan 30 will gradually stop rotating and its blades will overlap each other, so that the air outlet is sealed, preventing external oxygen from entering the power distribution box and helping to suppress the fire inside the power distribution box. The opening and closing principle of the self-opening and closing exhaust fan 30 is existing technology and will not be described in detail here. For details, please refer to the patent document with publication number CN2937567Y. Because spring 3 407 is made of shape memory alloy, when a fire occurs, as the temperature rises to the deformation temperature threshold of spring 3 407, spring 3 407 gradually changes from a spiral shape to a straight shape. During this process, spring 3 407 applies pressure to rotating seat 406 and pushes rotating seat 406 and moving column 404 to move together in sleeve 402. Under the guidance of ball 405 and threaded groove 403, moving column 404 and winding reel 408 rotate synchronously, so that winding reel 408 pulls several ropes 82 synchronously, so that several locking pins 81 are pulled out from locking hole 63 and limiting sleeve 12 synchronously. When the locking pin 81 is pulled out of the limiting sleeve 12, the locking effect disappears. Under the elastic force of the spring 604, the sealing plate 603 slides down on the limiting groove 602 to block the air intake window 11. Since the self-closing exhaust fan 30 was de-energized and gradually stopped before this, and its blades overlapped each other, the air outlet was in a sealed state. That is, the inside of the distribution box was in a near-sealed state at this time, and it was difficult for external oxygen to enter the inside of the distribution box, which played a role in suppressing the fire. When the locking pin 81 is pulled out from inside the locking hole 63, the locking effect disappears. Under the elastic force of the spring 62, the frame 71 moves towards the power distribution mechanism 4, directly covering the diaphragm 101 onto the power distribution mechanism 4. Since the diaphragm 101 has contractile properties, it further tightly wraps the diaphragm 101 around the power distribution mechanism 4, further achieving the effect of isolating oxygen, thus realizing a second line of oxygen isolation and further suppressing the fire. During this process, as the frame 71 moves toward the power distribution mechanism 4, it will actuate the valve 502, causing the valve 502 to be in the open state. At this time, the high-pressure extinguishing agent stored inside the fire extinguishing tank 501 will be sprayed out instantly. The sprayed extinguishing agent exists in the cavity structure formed by the diaphragm 101. When the extinguishing agent collides with the diaphragm 101, and then through the contraction characteristics of the diaphragm 101, the extinguishing agent can tightly cover the fire point, forming a third oxygen isolation defense line, and finally achieving the purpose of extinguishing the fire. The diaphragm 101 is made of elastic, high-temperature resistant, airtight and flame-retardant material to cope with complex working environments; the pull rope 82 can be made of steel wire rope so that it can be used normally in the event of a fire; in addition, the entire structure of the winding assembly 40 is made of metal material, and the surface shows signs of melting when heated. Traditional electrical distribution boxes, when a fire occurs, typically only block the airflow path to prevent oxygen from entering the box before spraying out extinguishing agents to put out the fire. However, this method has several problems: insufficient sealing, failing to completely prevent oxygen from entering the box, making it easy for smoldering areas to reignite; furthermore, when using extinguishing agents, the agent fills the entire box, failing to target the fire directly to the ignition point, still making reignition a possibility. This application employs a triple oxygen isolation mechanism, which greatly improves sealing performance to achieve better fire suppression. In addition, by utilizing the contraction characteristics of the diaphragm 101, the extinguishing agent can be tightly covered at the ignition point, making it targeted and having a better fire extinguishing effect compared to traditional extinguishing agent spraying.

[0035] It should be noted that when maintenance personnel are inspecting the equipment, they should first open the door 2, remove the locking pin 81 from the limit sleeve 12, and then remove the mounting bracket 9 and the elastic diaphragm 10. After that, they should inspect the internal power distribution mechanism 4. After the inspection is completed, the mounting bracket 9, the elastic diaphragm 10 and the locking pin 81 should be reset, and then the door 2 should be locked to complete the entire inspection process.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective distribution box, comprising a box body (1) and a door (2) hinged to the box body (1), wherein a plurality of mounting ears (3) are fixedly installed on the top and bottom surfaces of the box body (1), an air inlet window (11) is embedded and fixedly installed on the outer wall of one side of the box body (1), and a self-closing exhaust fan (30) is embedded and fixedly installed on the outer wall of the other side of the box body (1), a power distribution mechanism (4) is fixedly installed on the inner wall of one end of the box body (1), and a temperature sensor (5) for monitoring temperature is fixedly installed on the side wall of the power distribution mechanism (4), characterized in that: Several elastic components (6) are symmetrically fixedly installed on the inner wall of one side of the box (1). Support components (7) are slidably sleeved on the several elastic components (6). The several elastic components (6) and support components (7) are connected by several snap-fit ​​components (8) to form a support frame. An installation frame (9) is fixedly installed on the inner wall of one end of the box (1). An elastic diaphragm (10) is sealed and connected to the side wall of the installation frame (9). The power distribution mechanism (4), temperature sensor (5), elastic components (6), support components (7) and snap-fit ​​components (8) are all set in the space formed by the elastic diaphragm (10) and the inner wall of the box (1). A reciprocating component (20) is fixedly installed on the inner side wall of the box (1). The reciprocating component (20) periodically beats the elastic diaphragm (10), and the elastic diaphragm (10) periodically vibrates and breaks the thermal boundary.

2. The distribution box with good protection according to claim 1, characterized in that: The elastic component (6) includes a limiting rod (61) fixedly installed on the inner wall of one end of the housing (1), and a locking hole (63) is provided on the circumferential side wall of the limiting rod (61).

3. A distribution box with good protection according to claim 2, characterized in that: The support assembly (7) includes a frame (71). The side wall of the frame (71) facing the limiting rod (61) is elastically connected to the inner wall of the box (1) by a spring (62). Several hollow sleeves (72) are fixedly installed on the side wall of the frame (71) facing the limiting rod (61). The outer circumference of the hollow sleeve (72) is provided with a mounting hole (73). The mounting hole (73) has the same diameter as the card hole (63). A rubber pad (74) is fixedly installed at the edge of the opening of the mounting hole (73).

4. A distribution box with good protection according to claim 3, characterized in that: The snap-fit ​​assembly (8) includes a snap-fit ​​post (81) that snaps into the interior of the mounting hole (73) and the snap-fit ​​hole (63).

5. A distribution box with good protection according to claim 1, characterized in that: The elastic diaphragm (10) includes a diaphragm (101) that is sealed to the side wall of the mounting bracket (9). An air inlet (103) is provided on one side of the outer wall of the diaphragm (101), and an air outlet (102) is provided on the other side of the outer wall of the diaphragm (101).

6. A distribution box with good protection according to claim 5, characterized in that: The reciprocating assembly (20) includes a mounting base (201) fixedly mounted on the inner side wall of the housing (1). The mounting base (201) has symmetrically provided grooves (202) on the circumferential side wall of the inner cavity. A sliding column (203) is slidably mounted in the two grooves (202). A push plate (204) is fixedly mounted on the side wall of the sliding column (203) facing the diaphragm (101). The sliding column (203) and the mounting base (201) are elastically connected by a spring (205). An electromagnet (206) is fixedly mounted on the vertical side wall of the inner cavity of the mounting base (201). A permanent magnet (207) is fixedly mounted on the side wall of the sliding column (203) facing the electromagnet (206). The electromagnet (206) and the permanent magnet (207) are aligned.

7. A distribution box with good protection according to claim 4, characterized in that: It also includes a winding assembly (40) fixedly installed on the outer wall of the power distribution mechanism (4), the winding assembly (40) and the locking post (81) are connected by a pull rope (82), a pair of fire extinguishing assemblies (50) are symmetrically fixedly installed on the inner wall of the power distribution mechanism (4), and a sealing assembly (60) is provided on the inner wall of one side of the box (1).

8. A distribution box with good protection according to claim 7, characterized in that: The winding assembly (40) includes a mounting plate (401) fixedly installed on the outer wall of the power distribution mechanism (4), a sleeve (402) fixedly installed on the side wall of the mounting plate (401), a threaded groove (403) is provided in the inner ring of the sleeve (402), a movable column (404) is rotatably installed inside the sleeve (402), a number of balls (405) are rotatably installed on the outer circumference of the movable column (404), the balls (405) are rolled inside the threaded groove (403), a rotating seat (406) is rotatably installed on the side wall of the movable column (404) facing the mounting plate (401), the side wall of the rotating seat (406) and the side wall of the mounting plate (401) are elastically connected by a spring (407), a winding reel (408) is fixedly installed on the side wall of the movable column (404) facing the frame (71), and a number of pull ropes (82) are fixedly connected to the winding reel (408).

9. A distribution box with good protection according to claim 7, characterized in that: The fire extinguishing assembly (50) includes a fire extinguishing tank (501) fixedly installed on the inner wall of the power distribution mechanism (4), and a valve (502) is rotatably installed on the side wall of the fire extinguishing tank (501).

10. A distribution box with good protection according to claim 7, characterized in that: The sealing assembly (60) includes a fixed bracket (601) fixedly installed on the inner wall of one side of the housing (1). Limiting grooves (602) are respectively opened on two opposite side walls of the inner cavity of the fixed bracket (601). A sealing plate (603) is slidably installed in the two limiting grooves (602). The side wall of the sealing plate (603) and the side wall of the inner cavity of the fixed bracket (601) are elastically connected by a spring four (604). A rubber gasket two (605) is fixedly installed through the side wall at the lower end of the sealing plate (603). A limiting sleeve (12) is fixedly installed on the outer wall of one side of the box (1). The second rubber pad (605) is concentrically set with the limiting sleeve (12). The locking post (81) passes through the second rubber pad (605) and inserts into the limiting sleeve (12).

Images