Short-circuit protection type high-low voltage power distribution cabinet

Abstract

The application relates to the technical field of power distribution cabinets, in particular to a short-circuit protection type high-low voltage power distribution cabinet which comprises a transmission module, a control box, a temperature sensor, a blocking frame part, a bearing part and a cabinet body, the front side of the cabinet body is provided with a cabinet door part, the cabinet body comprises a main box part, the upper side of the main box part is provided with an upper storage part, the main box part comprises a box body, the left and right sides of the box body are both provided with insertion grooves, the opposite sides of a group of the insertion grooves are both provided with heat dissipation grates, and the upper sides of the insertion grooves are both provided with sliding grooves.In the application, the cabinet body, the cabinet door part, the transmission module, the connecting rope and the temperature sensor and other structures are arranged, so that the short-circuit protection type high-low voltage power distribution cabinet can automatically seal the cabinet body when arc light short circuit occurs, external oxygen is prevented from entering, and the flame caused by arc light short circuit can be quickly extinguished with the exhaustion of oxygen.

Description

Technical Field

[0001] This application relates to the field of distribution cabinet technology, specifically a short-circuit protected high and low voltage distribution cabinet. Background Technology

[0002] High and low voltage switchgear, as the name suggests, are power distribution equipment used in power supply systems for power distribution, control, metering, and cable connection. Generally, power supply bureaus and substations use high voltage switchgear, which is then stepped down by transformers to the low voltage side and led out to low voltage switchgear. The low voltage switchgear then leads to various power distribution panels, control boxes, and switch boxes. Inside, there are power distribution devices that integrate switches, circuit breakers, fuses, buttons, indicator lights, meters, wires, and other protective devices to achieve the designed functional requirements.

[0003] Existing high and low voltage switchgear generally uses circuit breakers, fuses, and other protective devices for short circuit protection. However, when an arc short circuit occurs, it generates high temperature and high pressure arcs. This high temperature is sufficient to ignite surrounding flammable materials, such as insulation materials and cable sheaths, thereby causing a fire. Even if the circuit breaker will quickly trip to cut off the circuit when it detects an abnormal current, in some cases, the circuit breaker's response speed may not be able to keep up with the high temperature and high pressure generated by the arc short circuit, or the circuit breaker itself may be faulty and unable to cut off the circuit. These factors can all lead to combustion. Therefore, in electrical systems, in addition to relying on circuit breakers for protection, other measures are needed to deal with combustion caused by arc short circuits. Therefore, based on the above problems, a short-circuit protection type high and low voltage switchgear is proposed. Summary of the Invention

[0004] The purpose of this application is to provide a short-circuit protected high and low voltage distribution cabinet to solve the problem that existing high and low voltage distribution cabinets generally use protective devices for short circuit protection, but the response speed of the protective devices may not be able to keep up with the high temperature and high pressure speed generated by arc short circuit, or the circuit breaker itself may be faulty and unable to cut off the circuit, which can lead to combustion and damage to electrical equipment.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A short-circuit protected high and low voltage distribution cabinet includes a transmission module, a control box, a temperature sensor, a baffle, a load-bearing part, and a cabinet body. A cabinet door is installed on the front side of the cabinet body. The cabinet body includes a main box section, and an upper storage section is installed on the upper side of the main box section. The main box section includes a housing. Slots are provided on both the left and right sides of the housing body. A set of slots has ventilation grilles on opposite sides. A sliding groove is provided on the upper side of each slot. A through rail connects the sliding groove and the slot. A retaining frame is slidably connected to the inner side of each through rail, located inside the sliding groove and slot. A sealing plate that cooperates with the retaining frame is slidably connected to the inner side of each through rail. A set of sealing plates has countersunk holes on opposite sides. The cabinet is fixedly connected to an external magnetic block. The cabinet door includes a base shell fixed to the lower side of the cabinet body. A guide plate is slidably connected to the inner side of the base shell. A door panel that fits against the front face of the cabinet body is fixedly connected to the upper front end of the guide plate. A front sealing plate located inside the cabinet body is fixedly connected to the rear end face of the door panel. Insert plates inserted into slots are fixedly connected to both sides of the rear end face of the door panel. A slot is opened on the side of the insert plate near the heat dissipation grille. Transmission modules are installed on the inner walls of both the left and right sides of the cabinet body. A connecting rope is installed between a group of transmission modules. A control box is installed on the inner wall of the left side of the cabinet body. Temperature sensors are installed on the upper and lower sides of the inner walls of both the left and right sides of the cabinet body.

[0007] Preferably, the transmission module includes a rail housing fixedly connected to the inner wall of the housing, an inner magnetic block slidably connected to the inner side of the rail housing and laterally aligned with the outer magnetic block, an opening in the front side plate of the rail housing, a seat bar fixedly connected to the front side of the rail housing below the opening, a set of two separately arranged guide rings fixedly connected to the upper end face of the seat bar, a protrusion fixedly connected to the front end of the seat bar, a transmission rod mounted on the inner side of the set of guide rings, the transmission rod including a rod body slidably connected to the annular hole of the guide ring, and a rear end of the rod body fixedly connected to a part passing through the opening and located below the inner magnetic block. The rod has a connecting block fixedly connected to its front end, a rope loop fixedly connected to the side plane end of the connecting block, a tension spring fixedly connected between the front end face of the connecting block and the rear end face of the protrusion, a cutting stop fixedly connected to the side of the seat bar away from the inner wall of the housing, the cutting stop including a stop block, a square opening on the inner side of the stop block, a fixing frame fixedly connected to the front side of the stop block, an electric push rod fixedly connected to the inner side of the hole of the fixing frame, a cutter fixedly connected to the drive rod of the electric push rod inside the square opening, and a connecting rope installed between a group of rope loops on the rear side of the stop block.

[0008] Preferably, the card frames are all inserted into the inner side of the card slots. The card frame is composed of a slotted base plate and card strips on both sides. The sealing plate is composed of a counterweight protrusion and a plate body. The counterweight protrusion of the sealing plate is set in the slot of the base plate of the card frame, and the plate body of the sealing plate is set between a group of card strips of the card frame.

[0009] Preferably, the width of the heat dissipation grille is smaller than the width of the guide rail, the combined width of the card frame and the sealing plate is larger than the width of the heat dissipation grille, a gap is provided between the protrusion and the connecting block, the temperature sensor is electrically connected to the control box, and the control box is electrically connected to the electric push rod.

[0010] Preferably, a filter screen is fixedly connected to the inner side of the circular opening of the insert plate, and the filter screen is arranged on the left and right sides of a set of heat dissipation grilles. The filter screen and the heat dissipation grilles are horizontally aligned. Scraper strips are fixedly connected to the left and right sides of the cabinet, and the opposing surfaces of a set of scraper strips are in contact with the outer end face of the insert plate.

[0011] Preferably, the upper storage section includes a storage shell fixedly connected to the housing, a dry powder storage cavity is formed on the inner side of the storage shell, a paper replacement port is formed on the left side of the dry powder storage cavity, a rail opening is formed at the lower front of the dry powder storage cavity, an opening is formed at the lower middle of the dry powder storage cavity, and a normally closed feeding head is fixedly connected to the hole on the left side of the storage shell. The baffle section includes a set of two folding rods fixedly connected to the inner magnetic block, and a rotating component is rotatably connected to the upper end of each folding rod. A rotating component is fixedly connected to the upper side of the set of rotating components. A baffle plate is located on the inner side of the opening. A stop bar is fixedly connected to the lower side of the baffle plate and located behind the folding rod. A counterweight rod is fixedly connected to the inner side of the groove of the stop bar. A bearing part is installed on the inner side of the upper storage part. The bearing part includes a push-pull plate located inside the paper changing opening. A grid plate located inside the dry powder storage cavity is fixedly connected to the lower right side of the push-pull plate. A pad is provided on the upper side of the grid plate. A push-pull block is fixedly connected to the left side of the push-pull plate. A rail plate that is slidably connected to the rail opening is fixedly connected to the rear side of the door panel.

[0012] Preferably, the lower end face of the rail plate is in contact with the upper end face of the front sealing plate, the outer end face of the rail plate is in contact with the inner wall of the rail opening, the front and rear lower end faces of the front sealing plate are in contact with the inner wall of the box, the outer end face of the baffle plate is in contact with the inner wall of the opening, the baffle plate and the rail plate are both located on the lower side of the pad paper, and the normally closed feeding head is composed of a tube body and a tube cap that is spirally connected to the tube body.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] 1. In this application, the cabinet, cabinet door, transmission module, connecting rope, and temperature sensor are designed to seal the front of the cabinet via the door panel, front sealing plate, and rail plate. The load-bearing section seals the upper storage area, i.e., the upper side of the cabinet. This allows the electrical equipment installed inside the cabinet to dissipate heat through ventilation grilles on both sides. When an arc short circuit occurs during the operation of the electrical equipment inside the cabinet, the protective devices inside the cabinet, such as circuit breakers, will immediately cut off the power supply to all electrical equipment. Simultaneously, the high temperature caused by the arc will be detected by the temperature sensor, which will then send a signal to the appropriate device. The control box sends an electrical signal, causing the electric push rods of each cutting section to extend. The extended push rods then drive the cutter through the square opening to cut the connecting rope. With the connecting rope and the stop block no longer limiting the transmission rod, the tension spring resets, pulling the transmission rod forward. This causes the stop block of the transmission rod to disengage from the rail housing at the opening. Because the stop block no longer limits the inner magnetic block, it can move downwards. At this point, the inner and outer magnetic blocks, positioned within the sliding groove by the sealing plate, can move downwards due to the weight of the plate and the counterweight protrusion, and gravity, inserting into the inside of the slot and aligning with the frame. The assembled frame and sealing plate can seal the heat dissipation vents on both sides of the cabinet, putting the cabinet in a sealed state. If the electrical equipment inside the cabinet catches fire due to an arc short circuit, the limited oxygen inside the cabinet will not be enough to support the prolonged combustion and expansion of the fire. The flame will extinguish as the oxygen is depleted, reducing the damage to the electrical equipment caused by the short circuit. On the other hand, if the temperature sensor, control box, or electric push rod malfunctions, the arc of the arc short circuit or the combustion caused by the arc can directly disconnect the connecting rope, causing the transmission rod to move forward and the inner magnetic block, outer magnetic block, and sealing plate to ignite. The baffle moves down to seal the heat dissipation grille of the cabinet, keeping the cabinet in a sealed state. This enables the short-circuit protected high and low voltage distribution cabinet to automatically seal the cabinet in the event of an arc short circuit, preventing the entry of external oxygen. This allows the flame caused by the arc short circuit to be quickly extinguished as the oxygen is depleted. This solves the problem that existing high and low voltage distribution cabinets generally use protective devices for short circuit protection, but the response speed of the protective devices may not be able to keep up with the high temperature and high pressure generated by the arc short circuit, or the circuit breaker itself may be faulty and unable to cut off the circuit. These problems can lead to combustion and damage to electrical equipment.

[0015] 2. In this application, through the structure of transmission module, baffle, bearing part, and upper storage part, the bearing part is installed inside the upper storage part, so that the grid plate and pad paper of the bearing part can bear the dry powder in the dry powder storage cavity. When the electrical equipment inside the cabinet experiences an arc short circuit, and the transmission rod moves forward, causing the inner magnetic block to lose its limit, the baffle part will be driven by gravity to move the inner magnetic block downward, causing the baffle part's shield to detach from the opening. Due to the setting of the abutment bar and counterweight rod, the weight of the shield is unbalanced, causing the shield that has detached from the opening to tilt towards the depth of the cabinet, i.e., the installation location of the electrical equipment. At the same time, the opening opens to expose the pad paper of the bearing part. When the electrical equipment inside the cabinet experiences an arc short circuit, the shield will be able to withstand the arc short circuit. When a fire caused by a short circuit grows larger and is not effectively controlled, the flame will ignite the padding paper on the upper side of the opening. This causes the dry powder carried on the padding paper to pass through the opening and be guided by the baffle plate, pouring towards the burning electrical equipment. The large amount of dry powder poured out can extinguish or effectively control the flame. This enables short-circuit protected high and low voltage switchgear to quickly extinguish or effectively control large-scale flames when a fire caused by an arc short circuit is not effectively controlled. This solves the problem that existing short-circuit protected high and low voltage switchgear cannot quickly control large-scale flames when a fire caused by an arc short circuit is not effectively controlled, thus preventing further losses. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a structural diagram of the cabinet in this application;

[0018] Figure 3 This is a structural diagram of the main box section of this application;

[0019] Figure 4 This is a schematic diagram of the structure of the storage section in this application;

[0020] Figure 5 This is a schematic diagram of the assembled structure of the card frame and the sealing plate in this application;

[0021] Figure 6 For this application Figure 5 Another structural diagram from another perspective;

[0022] Figure 7 This is a structural schematic diagram of the cabinet door section of this application;

[0023] Figure 8 For this application Figure 7 A schematic diagram of the split structure;

[0024] Figure 9 For this application Figure 1 A structural diagram of the cabinet door section;

[0025] Figure 10For this application Figure 9 Another perspective structural diagram;

[0026] Figure 11 For this application Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 12 For this application Figure 11 Another perspective structural diagram;

[0028] Figure 13 This is a schematic diagram of the transmission module of this application;

[0029] Figure 14 For this application Figure 13 A schematic diagram of the structure at point A;

[0030] Figure 15 This is a structural schematic diagram of the transmission rod in this application;

[0031] Figure 16 This is a schematic diagram of the structure of the cutting section in this application;

[0032] Figure 17 This is a schematic diagram of the structure of the retaining part of this application;

[0033] Figure 18 For this application Figure 17 A schematic diagram of the structure at point B;

[0034] Figure 19 For this application Figure 17 A schematic diagram of the structure after the action;

[0035] Figure 20 This is a schematic diagram of the structure of the bearing part of this application.

[0036] In the diagram: 1. Cabinet; 11. Main compartment; 111. Cabinet; 112. Slot; 113. Ventilation grille; 114. Slide rail; 115. Through rail; 12. Upper storage compartment; 121. Storage shell; 122. Dry powder storage chamber; 123. Rail opening; 124. Opening; 125. Paper changing port; 126. Normally closed feeding head; 13. Card frame; 14. Sealing plate; 15. External magnetic block; 16. Scraper strip; 2. Cabinet door; 21. Base shell; 22. Guide plate; 23. Door panel; 24. Front sealing plate; 25. Insert plate; 26. Card slot; 27. Filter screen; 28. Rail plate; 3. Transmission module; 31. Rail shell; 32. Inner... Magnetic block; 33. Through port; 34. Seat bar; 35. Guide ring; 36. Protrusion; 37. Transmission rod; 371. Rod body; 372. Stop block; 373. Connecting block; 374. Rope ring; 38. Tension spring; 39. Cutting part; 391. Abutment block; 392. Square opening; 393. Fixing frame; 394. Electric push rod; 395. Cutter; 4. Connecting rope; 5. Control box; 6. Temperature sensor; 7. Stop frame part; 71. Folding rod; 72. Rotating part; 73. Baffle plate; 74. Abutment bar; 75. Counterweight rod; 8. Bearing part; 81. Push-pull plate; 82. Grid plate; 83. Pad paper; 84. Push-pull block. Detailed Implementation

[0037] Please see Figure 1-20 This application provides a technical solution:

[0038] A short-circuit protected high and low voltage distribution cabinet includes a transmission module 3, a control box 5, a temperature sensor 6, a baffle 7, a load-bearing part 8, and a cabinet body 1. A cabinet door 2 is installed on the front side of the cabinet body 1. The cabinet body 1 includes a main box 11, and an upper storage part 12 is installed on the upper side of the main box 11. The main box 11 includes a housing 111. Slots 112 are provided on both the left and right sides of the housing 111. A heat dissipation grille 113 is provided on the opposing sides of a set of slots 112. A sliding groove 114 is provided on the upper side of each slot 112. A through rail 115 connects the sliding groove 114 and the slot 112. A retaining frame 13 is slidably connected to the inner side of each through rail 115, located inside the sliding groove 114 and the slot 112. A matching retaining frame 13 is slidably connected to the inner side of each through rail 115. The sealing plate 14 has an external magnetic block 15 fixedly connected to the countersunk hole on the opposite side of each set of sealing plates 14. The cabinet door 2 includes a base shell 21 fixed to the lower side of the cabinet body 1. A guide plate 22 is slidably connected to the inner side of the base shell 21. A door panel 23 that fits against the front face of the cabinet body 1 is fixedly connected to the upper front end of the guide plate 22. A front sealing plate 24 located inside the cabinet body 1 is fixedly connected to the rear end face of the door panel 23. Insert plates 25 that are inserted into the inner side of the slot 112 are fixedly connected to both sides of the rear end face of the door panel 23. A slot 26 is opened on the side of the insert plate 25 near the heat dissipation grille 113. Transmission modules 3 are installed on the inner walls of the left and right sides of the cabinet body 111. A connecting rope 4 is installed between a set of transmission modules 3. A control device is installed on the inner wall of the left side of the cabinet body 111. Temperature sensors 6 are installed on the upper and lower sides of the left and right inner walls of box 5 and housing 111. The transmission module 3 includes a rail housing 31 fixedly connected to the inner wall of housing 111. An inner magnetic block 32, which is laterally aligned with the outer magnetic block 15, is slidably connected to the inner side of the rail housing 31. An opening 33 is provided in the front side panel of the rail housing 31. A seat bar 34 located below the opening 33 is fixedly connected to the front side of the rail housing 31. A set of two separately arranged guide rings 35 is fixedly connected to the upper end face of the seat bar 34. A protrusion 36 is fixedly connected to the front end of the seat bar 34. A transmission rod 37 is installed on the inner side of the set of guide rings 35. The transmission rod 37 includes a rod body 371 slidably connected to the annular hole of the guide ring 35. The rear end of the rod body 371 is fixedly connected to a part that passes through the opening 33 and is located in the inner magnetic block 32. The lower stop block 372 has a connecting block 373 fixedly connected to the front end of the rod 371. A rope loop 374 is fixedly connected to the side plane end of the connecting block 373. A tension spring 38 is fixedly connected between the front end face of the connecting block 373 and the rear end face of the protrusion 36. A cutting part 39 is fixedly connected to the side of the seat bar 34 away from the inner wall of the housing 111. The cutting part 39 includes a stop block 391. A square opening 392 is opened on the inner side of the stop block 391. A fixing bracket 393 is fixedly connected to the front side of the stop block 391. An electric push rod 394 is fixedly connected to the inner side of the hole of the fixing bracket 393. A cutter 395 located inside the square opening 392 is fixedly connected to the drive rod of the electric push rod 394. A connecting rope 4 located behind the stop block 391 is installed between a set of rope loops 374.The connecting rope 4 can be used as the starting point. Disconnecting the connecting rope 4 will cause the stop block 391 to stop limiting the transmission rod 37. The transmission rod 37 will move forward under the tension of the tension spring 38, so that the stop block 372 of the transmission rod 37 will stop limiting the inner magnetic block 32. This allows the inner magnetic block 32, the outer magnetic block 15, and the sealing plate 14 to move downward to seal the heat dissipation grille 113, making the cabinet 1 a sealed state. This causes the combustion inside the cabinet 1 to be quickly extinguished due to limited oxygen. The card frames 13 are all inserted into the inside of the card slots 26. The card frames 13 are composed of a slotted base plate and card strips on both sides. This configuration allows the card frame 13 to position the insert plate 25. The sealing plate 14 consists of a counterweight protrusion and a plate body. This configuration allows the sealing plate 14, which has lost its limit, to move downwards by gravity and weight. The counterweight protrusion of the sealing plate 14 is set in the seat plate groove of the card frame 13, and the plate body of the sealing plate 14 is set between a set of card strips of the card frame 13. This configuration allows the card frame 13 and the sealing plate 14 to be assembled. The width of the heat dissipation grille 113 is smaller than the width of the through rail 115. After the card frame 13 and the sealing plate 14 are assembled, the width of the grille is larger than the width of the heat dissipation grille 113. The size of the frame 13 and the sealing plate 14 after assembly completely seals the heat dissipation grille 113. A gap is provided between the protrusion 36 and the connecting block 373, allowing the transmission rod 37 to move forward with sufficient distance. The temperature sensor 6 is electrically connected to the control box 5, and the control box 5 is electrically connected to the electric push rod 394. This allows the control box 5 to control the action of the electric push rod 394 by receiving signals from the temperature sensor 6. Filter screens 27 are fixedly connected to the inner side of the circular opening of the insert plate 25, and the filter screens 27 are all located in a set of heat dissipation grilles 113. On both sides of cabinet 1, the filter screen 27 and the heat dissipation grille 113 are horizontally aligned. This arrangement allows the filter screen 27 to filter the airflow entering cabinet 1, preventing dust from entering. If the dust contains metal particles, it may cause a short circuit in electrical equipment. Scraper strips 16 are fixedly connected to both sides of cabinet 1. The opposing surfaces of a set of scraper strips 16 are in contact with the outer end face of the insert plate 25. This arrangement allows the insert plate 25 to pull the filter screen 27 out of the slot 112 when the cabinet door is removed. During this process, the scraper strips 16 clean and scrape off the dust filtered from the surface of the filter screen 27.

[0039] like Figures 7-12 , Figures 17-20As shown, the upper storage section 12 includes a storage shell 121 fixedly connected to the housing 111. A dry powder storage cavity 122 is opened on the inner side of the storage shell 121. A paper replacement port 125 is opened on the left side of the dry powder storage cavity 122. A rail opening 123 is opened at the lower front of the dry powder storage cavity 122. An opening 124 is opened at the lower middle of the dry powder storage cavity 122. A normally closed feeding head 126 is fixedly connected to the hole on the left side of the storage shell 121. The baffle section 7 includes a set of two folding rods 71 ​​fixedly connected to the inner magnetic block 32. The upper end of each folding rod 71 is rotatably connected to a rotating part 72. A baffle plate 73 located inside the opening 124 is fixedly connected to the upper side of the set of rotating parts 72. A stop bar 74 located behind the folding rod 71 is fixedly connected to the lower side of the baffle plate 73. A counterweight rod 75 is fixedly connected to the inner side of the groove of the stop bar 74. A bearing part 8 is installed inside the upper storage part 12. The bearing part 8 includes a push-pull plate 81 located inside the paper changing port 125. A grid plate 82 located inside the dry powder storage chamber 122 is fixedly connected to the lower right side of the push-pull plate 81. A pad paper 83 is provided on the upper side of the grid plate 82. A push-pull block 84 is fixedly connected to the left side of the push-pull plate 81. A rail plate 28 that is slidably connected to the rail opening 123 is fixedly connected to the rear side of the door panel 23. This arrangement allows the grid plate 82 of the bearing part 8 to support the pad paper 83. The pad paper 83 can support the dry powder. When an arc short circuit occurs, the baffle 7 will move down, exposing the pad paper 83 on the upper side of the opening 124. If the fire caused by the short circuit is too large and not effectively controlled, the flame will ignite the pad paper 83. At this time, the dry powder can pass through the opening 124 and be guided by the baffle 7 after the action, tilting the burning electrical equipment to quickly extinguish or control the fire. The lower end face of the rail plate 28 is in contact with the upper end face of the front sealing plate 24, the outer end face of the rail plate 28 is in contact with the inner wall of the rail opening 123, and the front and rear lower end faces of the front sealing plate 24 are in contact with the inner wall of the housing 111. Through this arrangement, the rail plate 28... 8. The front sealing plate 24 and the door panel 23 can seal the front side of the cabinet 1. The outer end face of the shielding plate 73 is in contact with the inner wall of the opening 124. This setting prevents the shielding plate 73 inside the opening 124 from rotating. The shielding plate 73 and the rail plate 28 are both set under the pad paper 83. This setting allows the shielding plate 73 and the rail plate 28 to cover the pad paper 83, preventing the pad paper 83 from being damaged due to other reasons, which could lead to dry powder leakage. The normally closed feeding head 126 consists of a tube body and a tube cap that is spirally connected to the tube body. This setting allows the operator to add dry powder to the dry powder storage chamber 122 through the normally closed feeding head 126.

[0040] Workflow: The operation and actions of the short-circuit protected high and low voltage distribution cabinet under different conditions are as follows. Note 1: All electrical equipment is installed inside the enclosure 111. Note 2: The cabinet door installation operation is as follows: Using the base 21 as a guide, push in the guide plate 22, causing the door panel 23, front sealing plate 24, insertion plate 25, and rail plate 28 to move towards the cabinet 1, so that the rail plate 28 is inserted into the rail opening 123, making the door panel 23 fit against the front end of the cabinet 1, inserting the front sealing plate 24 into the inside of the cabinet 1, and inserting the insertion plate 25 into the slot 112. At this time, push down the retaining frame 13 to move it, so that the retaining frame 13 is inserted into the retaining groove 26 of the insertion plate 25. The retaining frame 13 limits the insertion plate 25, thus completing the installation of the door panel 23, front sealing plate 24, rail plate 28, and guide plate. Fixing 22 is completed by the above operations to install the cabinet door, while disassembling the cabinet door is done in the reverse direction; Note 3: When disassembling the cabinet door, the insert plate 25 will drive the filter screen 27 to disengage from the slot 112. During the disengagement process, the scraper 16 will clean and scrape off the dust filtered on the surface of the filter screen 27; Note 4: The operation of replacing the gasket 83 and adding dry powder is as follows: Pull the push-pull plate 81 outward by the push-pull block 84. The outward displacement of the push-pull plate 81 will drive the grid plate 82 to disengage from the dry powder storage cavity 122. At this time, the gasket 83 can be applied to the grid plate 82 or the gasket 83 can be replaced. After completion, the bearing part 8 is reset, and then the normally closed feeding head 126 is opened to add dry powder to the dry powder storage cavity 122 so that the dry powder is stored on the upper side of the gasket 83;Firstly, the door panel 23, front sealing plate 24, and rail plate 28 of the cabinet door 2 can seal the front side of the cabinet 1. The bearing part 8 can seal the upper storage part 12, i.e., the upper side of the cabinet 1, so that the electrical equipment installed in the cabinet 1 can dissipate heat through the heat dissipation grilles 113 on both sides. When an arc short circuit occurs in the operation of the electrical equipment in the cabinet 1, the protection devices in the cabinet 1, such as the circuit breaker, will immediately cut off the power supply to each electrical device. At the same time, the high temperature caused by the arc will be detected by the temperature sensor 6, which will send a signal to the control box 5. The control box 5 controls the extension of the electric push rods 394 of each cutting section 39, allowing the extended electric push rods 394 to drive the cutter 395 through the square opening 392 to cut the connecting rope 4. With the connecting rope 4 and the stop block 391 no longer limiting the transmission rod 37, the tension spring 38 can reset, pulling the transmission rod 37 forward. This causes the stop block 372 of the transmission rod 37 to disengage from the rail housing 31 at the opening 33. Because the stop block 372 no longer limits the inner magnetic block 32, the inner magnetic block 32 can move downwards. At this time, because the inner magnetic block 32 and the outer magnetic block 15 are positioned... The sealing plate 14 inside the slide 114 can be displaced downwards by the weight of the plate and the counterweight protrusion, and inserted into the inside of the slot 112 and assembled with the frame 13. The assembled frame 13 and sealing plate 14 can seal the heat dissipation grilles 113 on both sides of the cabinet 1. At this time, the cabinet 1 will be in a sealed state. If the electrical equipment inside the cabinet 1 catches fire due to arc short circuit, the limited oxygen inside the cabinet 1 will not be able to support the long-term combustion and expansion of the fire. The flame will be extinguished as the oxygen is exhausted, reducing the damage of the flame caused by the short circuit to the electrical equipment. On the one hand, if the temperature sensor 6, control box 5, or electric push rod 394 malfunctions, the arc of the arc short circuit or the combustion of the arc can directly disconnect the connecting rope 4, causing the transmission rod 37 to move forward, and causing the inner magnetic block 32, outer magnetic block 15, and sealing plate 14 to move down to seal the heat dissipation grille 113 of the cabinet 1, so that the cabinet 1 is in a sealed state, and the short-circuit protection high and low voltage distribution cabinet can automatically seal the cabinet 1 when an arc short circuit occurs, preventing the entry of external oxygen, and causing the flame caused by the arc short circuit to be quickly extinguished as the oxygen is exhausted;The operation when the flame is not effectively controlled is as follows: The support part 8 is installed inside the upper storage part 12, so that the grid plate 82 and the pad paper 83 of the support part 8 can support the dry powder in the dry powder storage cavity 122. When the electrical equipment in the cabinet 1 experiences an arc short circuit, the transmission rod 37 is affected and moves forward, causing the inner magnetic block 32 to lose its limit. The baffle part 7 will be driven by gravity to move the inner magnetic block 32 downward, causing the baffle plate 73 of the baffle part 7 to disengage from the opening 124. Due to the setting of the abutment bar 74 and the counterweight rod 75, the weight of the baffle plate 73 is unbalanced, causing the baffle plate 73, which has disengaged from the opening 124, to tilt towards the depth of the cabinet 1, i.e., the installation location of the electrical equipment. At the same time, the opening 124 opens, exposing the pad paper 83 of the support part 8. When the combustion caused by the arc short circuit of the electrical equipment in the cabinet 1 becomes larger and is not effectively controlled, the flame will ignite the pad paper 83 on the upper side of the opening 124, causing the dry powder supported on the upper side of the pad paper 83 to pass through. Opening 124, guided by baffle 73, pours dry powder towards the burning electrical equipment. The large amount of dry powder poured out can extinguish or effectively control the flame. When an arc short circuit causes an explosion, door panel 23 will be directly impacted and deformed. The deformation of door panel 23 will cause the upper rail plate 28 to move outward, exposing rail opening 123 and the pad paper 83 on the upper side of rail opening 123. At this time, the flames accompanying the explosion will ignite the pad paper 83, allowing the dry powder to be discharged through rail opening 123 to control or extinguish the flame. During maintenance, door panel 23 and rail plate 28 will be removed, directly exposing rail opening 123. If a short circuit causes a large-scale instantaneous combustion, the flame will directly ignite the pad paper 83, causing the dry powder to pour downward to control the flame. This allows the short-circuit protected high and low voltage distribution cabinet to quickly extinguish or effectively control large-scale flames when combustion caused by arc short circuit is not effectively controlled.

[0041] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the method and core ideas of this application. The above are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the application to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A short-circuit protected high and low voltage distribution cabinet, comprising a transmission module (3), a control box (5), a temperature sensor (6), a baffle (7), a support (8), and a cabinet (1), characterized in that: The cabinet (1) has a cabinet door (2) installed on the front side. The cabinet (1) includes a main box (11). An upper storage section (12) is installed on the upper side of the main box (11). The main box (11) includes a box body (111). Slots (112) are provided on both the left and right sides of the box body (111). A heat dissipation grille (113) is provided on the opposite side of a set of slots (112). A sliding groove (113) is provided on the upper side of each slot (112). 14), a through rail (115) connects the slide (114) and the slot (112). A card frame (13) is slidably connected to the inner side of the through rail (115) and the inner side of the slot (112). A sealing plate (14) that cooperates with the card frame (13) is slidably connected to the inner side of the through rail (115). An external magnetic block (15) is fixedly connected to the countersunk hole on the opposite side of a set of sealing plates (14). The cabinet door Part (2) includes a base shell (21) fixed to the lower side of the cabinet (1). A guide plate (22) is slidably connected to the inner side of the base shell (21). A door panel (23) that fits against the front face of the cabinet (1) is fixedly connected to the upper front end of the guide plate (22). A front sealing plate (24) located inside the cabinet (1) is fixedly connected to the rear end face of the door panel (23). Both sides of the rear end face of the door panel (23) are fixedly connected to slots (1). The inner side of the insert plate (25) of the 12) has a slot (26) on the side of the insert plate (25) near the heat dissipation grille (113). The inner walls of the left and right sides of the box (111) are equipped with transmission modules (3). A connecting rope (4) is installed between a group of transmission modules (3). The inner wall of the left side of the box (111) is equipped with a control box (5). Temperature sensors (6) are installed on the upper and lower sides of the inner walls of the left and right sides of the box (111).

2. A short-circuit protected high and low voltage distribution cabinet according to claim 1, characterized in that: The transmission module (3) includes a rail shell (31) fixedly connected to the inner wall of the housing (111). An inner magnetic block (32) aligned laterally with the outer magnetic block (15) is slidably connected to the inner side of the rail shell (31). A through-hole (33) is opened in the front side plate of the rail shell (31). A seat bar (34) located below the through-hole (33) is fixedly connected to the front side of the rail shell (31). A set of two separately arranged guide rings (35) is fixedly connected to the upper end face of the seat bar (34). A protrusion (36) is fixedly connected to the front end of the seat bar (34). A transmission rod (37) is installed on the inner side of the set of guide rings (35). The transmission rod (37) includes a rod body (371) slidably connected to the annular hole of the guide ring (35). A stop block (372) passing through the through-hole (33) and located below the inner magnetic block (32) is fixedly connected to the rear end of the rod body (371). A connecting block (373) is fixedly connected to the front end of 71), a rope ring (374) is fixedly connected to the side plane end of the connecting block (373), a tension spring (38) is fixedly connected between the front end face of the connecting block (373) and the rear end face of the protrusion (36), a cutting part (39) is fixedly connected to the side of the seat bar (34) away from the inner wall of the box (111), the cutting part (39) includes a stop block (391), a square opening (392) is opened on the inner side of the stop block (391), a fixing frame (393) is fixedly connected to the front side of the stop block (391), an electric push rod (394) is fixedly connected to the inner side of the hole of the fixing frame (393), a cutter (395) located inside the square opening (392) is fixedly connected to the drive rod of the electric push rod (394), and a connecting rope (4) located behind the stop block (391) is installed between a group of rope rings (374).

3. A short-circuit protected high and low voltage distribution cabinet according to claim 2, characterized in that: The card frames (13) are all inserted into the inside of the card slots (26). The card frames (13) are composed of a slotted seat plate and card strips on both sides. The sealing plate (14) is composed of a counterweight protrusion and a plate body. The counterweight protrusion of the sealing plate (14) is set in the seat plate slot of the card frame (13). The plate body of the sealing plate (14) is set between a set of card strips of the card frame (13).

4. A short-circuit protected high and low voltage distribution cabinet according to claim 2, characterized in that: The width of the heat dissipation grille (113) is smaller than the width of the rail (115). The width of the combined frame (13) and the baffle (14) is greater than the width of the heat dissipation grille (113). There is a gap between the protrusion (36) and the connecting block (373). The temperature sensor (6) is electrically connected to the control box (5). The control box (5) is electrically connected to the electric push rod (394).

5. A short-circuit protected high and low voltage distribution cabinet according to claim 2, characterized in that: The inner side of the circular opening of the insert plate (25) is fixedly connected with a filter screen (27). The filter screen (27) is set on the left and right sides of a set of heat dissipation grilles (113). The filter screen (27) and the heat dissipation grilles (113) are horizontally aligned. The left and right sides of the cabinet (1) are fixedly connected with scraper strips (16). The facing surfaces of a set of scraper strips (16) are in contact with the outer end face of the insert plate (25).

6. A short-circuit protected high and low voltage distribution cabinet according to claim 2, characterized in that: The upper storage section (12) includes a storage shell (121) fixedly connected to the housing (111). A dry powder storage cavity (122) is opened on the inner side of the storage shell (121). A paper changing port (125) is opened on the left side of the dry powder storage cavity (122). A rail opening (123) is opened on the lower front part of the dry powder storage cavity (122). An opening (124) is opened on the lower middle part of the dry powder storage cavity (122). A normally closed feeding head (126) is fixedly connected to the left hole of the storage shell (121). The baffle section (7) includes a set of two folding rods (71) fixedly connected to the inner magnetic block (32). The upper end of each folding rod (71) is rotatably connected to a rotating part (72). The upper side of the rotating part (72) is fixedly connected to a part located at the opening (124). 4) The inner side of the shielding plate (73) is fixedly connected to the lower side of the shielding plate (73) and the backing bar (74) is fixedly connected to the backing bar (71). The counterweight bar (75) is fixedly connected to the inner side of the groove of the backing bar (74). The inner side of the upper storage part (12) is equipped with a bearing part (8). The bearing part (8) includes a push-pull plate (81) inside the paper changing port (125). The lower right side of the push-pull plate (81) is fixedly connected to a grid plate (82) inside the dry powder storage chamber (122). A pad paper (83) is provided on the upper side of the grid plate (82). A push-pull block (84) is fixedly connected to the left side of the push-pull plate (81). The rear side of the door panel (23) is fixedly connected to a rail plate (28) that is slidably connected to the rail opening (123).

7. A short-circuit protected high and low voltage distribution cabinet according to claim 6, characterized in that: The lower end face of the rail plate (28) is in contact with the upper end face of the front sealing plate (24), the outer end face of the rail plate (28) is in contact with the inner wall of the rail opening (123), the front and rear lower end faces of the front sealing plate (24) are in contact with the inner wall of the box (111), the outer end face of the baffle plate (73) is in contact with the inner wall of the opening (124), the baffle plate (73) and the rail plate (28) are both located on the lower side of the pad paper (83), and the normally closed feeding head (126) is composed of a tube body and a tube cover that is spirally connected to the tube body.

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