Circuit emergency protection device for low-voltage safety power distribution cabinet

Abstract

The invention discloses a low-voltage safety power distribution cabinet circuit emergency protection device, and belongs to the field of electrical equipment.The low-voltage safety power distribution cabinet circuit emergency protection device comprises a mounting plate, a mounting frame is fixedly connected to one side of the mounting plate, and a stepping motor is fixedly connected to the upper surface of the mounting frame; the output end of the stepping motor is fixedly connected with a rotating block. The fuse in the mounting groove can accurately move between the two power connection parts under the rotation action of the rotating block, so that the accurate connection between the fuse and the power connection parts is ensured, and the phenomena that the fuse and the power connection parts deviate, the contact area is small, and the heat is greatly increased are avoided; when the fuse is replaced, the first L-shaped plate pushes the fuse in the placing frame to enter the mounting groove for filling, so that automatic feeding can be realized, manual operation is avoided in the whole process, errors generated by manual operation are reduced, and the safety of replacing the fuse is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of electrical equipment, and more specifically, to an emergency protection device for the circuit of a low-voltage safety power distribution cabinet. Background Art

[0002] An emergency protection device for the circuit of a low-voltage safety power distribution cabinet is usually used to prevent damage or safety risks caused by faults or overloads in the circuit. Such circuit emergency protection devices are used to detect whether the current passes through an abnormal path, and the combination of these protection devices can effectively ensure the safe operation of the circuit of the low-voltage safety power distribution cabinet.

[0003] Chinese Patent with the authorization announcement number CN115206749B discloses an emergency protection device for the circuit of food processing equipment. Through the settings of a storage slot, an arc-shaped push plate and spring C, a spare fuse can be stored in the storage slot. Spring C applies a thrust to the arc-shaped push plate to move the fuse to the top of the component insertion hole. When the storage cavity is in communication with the component insertion hole, the U-shaped guide rod is pulled in the reverse direction, and the fuse inside the storage slot automatically falls into the storage cavity through the component insertion hole, making the loading of the fuse inside the switching wheel more convenient; however, when replacing the fuse, the drive shaft is manually rotated to move the fuse between two power connection metal parts to form a circuit. Manually rotating the drive shaft may cause a certain deviation between the fuse and the two power connection metal parts, resulting in a small contact area between the power connection metal part and one end of the fuse, causing excessive heat generation at the place where the fuse contacts the power connection metal part in a short time, leading to the melting of the insulating material around the contact point, and manual operation will increase the probability of electric shock, posing a great safety hazard. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an emergency protection device for the circuit of a low-voltage safety power distribution cabinet.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] An emergency protection device for the circuit of a low-voltage safety power distribution cabinet includes a mounting plate. One side of the mounting plate is fixedly connected with a mounting frame. The upper surface of the mounting frame is fixedly connected with a stepping motor. The output end of the stepping motor is fixedly connected with a rotating block. The outer surface of the rotating block is provided with a mounting groove. Openings are provided on the upper surface and the lower surface of the inner part of the mounting frame near the mounting plate. A feeding component for quickly installing a fuse is arranged on the outer surface of the mounting frame.

[0007] The feeding component includes a placement frame fixed on the outer surface of the installation frame and a fixing plate fixed at the edge of the upper surface of the installation frame. A chute is provided on the upper surface of the placement frame, and a sliding plate is slidably connected inside the chute. A first spring is connected between the sliding plate and the fixing plate. The inner bottom of the sliding plate is slidably connected with a first L-shaped plate, and a pull rod is fixedly connected to the top of the first L-shaped plate.

[0008] Further, power connection components are provided on the upper and lower surfaces of the installation frame near the installation plate. The top of the pull rod penetrates the inside of the sliding plate, and the pull rod and the sliding plate slide relative to each other. An arc groove adapted to the fuse is provided on one side of the first L-shaped plate, and the stepping motor is powered by a storage battery.

[0009] A fuse removal component for collecting waste is provided on the lower surface of the installation frame. The removal component includes four second L-shaped plates fixed on the lower surface of the installation frame and a discharge hole opened on one side of the inner bottom of the installation frame. A convex edge is slidably connected inside the second L-shaped plate, and a collection box is provided inside the convex edge.

[0010] There are four groups of the second L-shaped plates. The second L-shaped plates are located in pairs on one side and are symmetrically arranged. The upper surface of the collection box fits with the lower surface of the installation frame, and the discharge hole is located above the collection box.

[0011] A pushing component for moving the fuse is provided on the inner surface of the collection box. The pushing component includes five rollers rotatably arranged near the bottom of the inner surface of the collection box and a transmission shaft fixedly connected to the center of the lower surface of the rotating block. A transmission belt is sleeved on the outer surface of the roller, a gear is fixedly connected to one side of the roller, and a crown gear is fixedly connected to the bottom of the transmission shaft.

[0012] One side of a roller extends out of the inside of the collection box and is fixedly connected with a gear. The bottom of the transmission shaft extends out of the inside of the installation frame. The crown gear and the gear are perpendicular to each other and mesh with each other.

[0013] The power connection component includes insulating fixing cylinders fixed on the upper and lower surfaces of the installation frame. A wiring groove is fixedly connected to the top of the insulating fixing cylinder. A fixing bolt is threadedly connected to the upper surface of the wiring groove. A conductive plate is fixedly connected to the inner top of the insulating fixing cylinder. A second spring is fixedly connected to the bottom of the conductive plate, and a contact piece is fixedly connected to the bottom of the second spring.

[0014] The insulating fixing cylinder is located directly above the opening, and the inside of the insulating fixing cylinder is in communication with the inside of the opening. The contact piece is connected to one end of the fuse inside the installation groove, and the conductive plate and the wiring groove are connected to each other through a conductive rod.

[0015] A cooling component for cooling the electrical connection components is provided around the insulating fixing cylinder on the upper surface of the installation frame. The cooling component includes a fixed pipe fixed on the upper and lower surfaces of the installation frame, an air inlet opened on the outer surface of the insulating fixing cylinder, and a temperature sensor fixed on the inner surface of the insulating fixing cylinder. A first card slot is opened on the upper surface of the fixed pipe. A magnetic ring is fixedly connected to the outer surface of the fixed pipe. A metal movable cylinder is sleeved on the outer surface of the fixed pipe. A cooling component is arranged on the upper surface of the metal movable cylinder. A second card slot is opened on one side of the lower surface of the metal movable cylinder. The inner bottom of the first card slot and the inner top of the second card slot are both arc-shaped. Rubbers are arranged on the inner surfaces of the first card slot and the second card slot.

[0016] The cooling component includes a liquid nitrogen tank fixed on the upper surface of the metal movable cylinder. An electromagnetic valve is arranged on the outer surface of the liquid nitrogen tank. One end of the electromagnetic valve is fixedly connected to a spray pipe. Both the electromagnetic valve and the spray pipe are located inside the metal movable cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this solution, by providing a feeding component, under the rotation of the rotating block, the fuse inside the installation groove accurately moves between the two electrical connection components, ensuring the accurate connection between the fuse and the electrical connection components, avoiding deviation between the two, resulting in a small contact area and avoiding a sharp rise in heat. The first L-shaped plate will push the fuse inside the placement frame into the installation groove for filling, so as to realize automatic feeding. The whole process avoids manual operation, reduces the error generated by manual operation, and greatly improves the safety of replacing the fuse.

[0018] 2. In this solution, by providing a removal component, if the fuse is damaged, the stepper motor will drive the rotating block to rotate one-sixth of a circle, and the rotating block will drive the damaged fuse to move towards the discharge hole. When the damaged fuse moves above the discharge hole, it will fall freely into the collection frame for collection, avoiding the damaged fuse falling inside or around the equipment, avoiding interference of the fuse with the operation of the equipment, and also avoiding the step of manually removing the damaged fuse, and minimizing the risk of electric shock as much as possible.

[0019] 3. In this solution, by providing a pushing component, when the rotating block rotates to drive the damaged fuse to move towards the discharge hole, it also drives the transmission shaft to rotate. The transmission shaft drives the gear to rotate through the crown gear, and the gear drives the roller to rotate synchronously, driving the transmission belt to move. The fuse falling on the transmission belt moves towards the other end of the collection frame with the transmission belt, avoiding affecting the subsequent falling fuses. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic cross-sectional structure of the present inventionFigure 1 ; Figure 3 Schematic cross-sectional structure of the present invention Figure 2 ; Figure 4 Schematic diagram of the placement frame structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of part A; Figure 6 Schematic diagram of the disassembly component structure of the present invention; Figure 7 Schematic cross-sectional structure of the collection box of the present invention; Figure 8 Schematic diagram of the discharge hole structure of the present invention; Figure 9 Schematic diagram of the fixed pipe and metal movable cylinder structure of the present invention; Figure 10 Schematic diagram of the internal structure of the fixed pipe of the present invention; Figure 11 Schematic diagram of the power connection component structure of the present invention.

[0021] Explanation of the reference numerals in the figure: 1. Mounting plate; 2. Mounting frame; 3. Loading component; 31. Placement frame; 32. Fixed plate; 33. First spring; 34. First L-shaped plate; 35. Slide plate; 36. Disassembly component; 361. Second L-shaped plate; 362. Convex edge; 363. Collection box; 364. Discharge hole; 37. Pushing component; 371. Roller; 372. Gear; 373. Transmission belt; 374. Crown gear; 375. Transmission shaft; 38. Chute; 39. Pull rod; 4. Cooling component; 41. Fixed pipe; 42. Metal movable cylinder; 43. Magnetic ring; 44. Liquid nitrogen tank; 45. Solenoid valve; 46. Spray pipe; 47. First card slot; 48. Second card slot; 49. Air inlet; 410. Temperature sensor; 5. Stepper motor; 6. Rotating block; 7. Mounting groove; 8. Power connection component; 81. Insulating fixed cylinder; 82. Wire groove; 83. Fixed bolt; 84. Conductive plate; 85. Second spring; 86. Contact piece; 9. Opening. Detailed implementation method

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] Please refer to Figures 1 to 11 , a low-voltage safety power distribution cabinet circuit emergency protection device, including a mounting plate 1. One side of the mounting plate 1 is fixedly connected with a mounting frame 2. The upper surface of the mounting frame 2 is fixedly connected with a stepping motor 5. The output end of the stepping motor 5 is fixedly connected with a rotating block 6. An installation groove 7 is opened on the outer surface of the rotating block 6. Openings 9 are opened on the upper and lower surfaces of the inner part of the mounting frame 2 near the mounting plate 1. A feeding component 3 for quickly installing a fuse is arranged on the outer surface of the mounting frame 2.

[0024] As Figure 3 、 Figure 4 and Figure 5 shown, the feeding component 3 includes a placing frame 31 fixed on the outer surface of the mounting frame 2 and a fixing plate 32 fixed at the edge of the upper surface of the mounting frame 2. A sliding groove 38 is opened on the upper surface of the placing frame 31. A sliding plate 35 is slidably connected inside the sliding groove 38. A first spring 33 is connected between the sliding plate 35 and the fixing plate 32. The inner bottom of the sliding plate 35 is slidably connected with a first L-shaped plate 34. The top of the first L-shaped plate 34 is fixedly connected with a pull rod 39.

[0025] Power connection components 8 are arranged on the upper and lower surfaces of the mounting frame 2 near the mounting plate 1. The top of the pull rod 39 penetrates through the inside of the sliding plate 35. The pull rod 39 and the sliding plate 35 slide relative to each other. An arc groove adapted to the fuse is arranged on one side of the first L-shaped plate 34. The stepping motor 5 is powered by a storage battery.

[0026] When a circuit fails and the fuse fails, it is necessary to replace the failed fuse. The stepping motor 5 is turned on through the terminal to work. The stepping motor 5 drives the rotating block 6 to rotate counterclockwise, driving the fuse inside the installation groove 7 near the placing frame 31 to move. After the rotating block 6 rotates half a circle, the fuse inside the installation groove 7 accurately moves between the two power connection components 8, ensuring the precise connection between the fuse and the power connection components 8, avoiding deviation between the two, resulting in a small contact area and avoiding a sharp rise in heat. At the same time, when the rotating block 6 moves, it drives a fuse, and the fuse inside the placing frame 31 is pushed by the first L-shaped plate 34 to approach the rotating block 6. When the next installation groove 7 moves to the placing frame 31, it will push the fuse inside the placing frame 31 into the installation groove 7 for filling, so as to achieve automatic feeding. The whole process avoids manual operation, reduces the error generated by manual operation, and greatly improves the safety of replacing the fuse; After the fuse inside the placement frame 31 is used up, it needs to be replenished inside. At this time, pull the pull rod 39 to drive the first L-shaped plate 34 to move upward into the chute 38. Place the fuse inside the placement frame 31. After placement, pull the sliding plate 35 to drive the first L-shaped plate 34 to move towards the end away from the fixed plate 32, then press the pull rod 39 downward to move the first L-shaped plate 34 into the placement frame 31. Release the sliding plate 35. Under the pulling force of the first spring 33, the first L-shaped plate 34 tightly contacts and presses the fuse.

[0027] As Figures 6 - 8 shown, a component 36 for collecting discarded fuses is provided on the lower surface of the installation frame 2. The removal component 36 includes four second L-shaped plates 361 fixed to the lower surface of the installation frame 2 and a discharge hole 364 opened on one side of the inner bottom of the installation frame 2. A convex edge 362 is slidably connected inside the second L-shaped plate 361, and a collection frame 363 is provided inside the convex edge 362.

[0028] There are four groups of second L-shaped plates 361. The second L-shaped plates 361 are located in pairs on one side and are axially symmetrically arranged. The upper surface of the collection frame 363 fits with the lower surface of the installation frame 2, and the discharge hole 364 is located above the collection frame 363.

[0029] After a period of time, if the fuse is damaged, a new fuse needs to be installed again. The stepper motor 5 will drive the rotating block 6 to rotate one-sixth of a circle, and the damaged fuse will move synchronously with the rotating block 6. The rotating block 6 drives the damaged fuse to move towards the discharge hole 364. When the damaged fuse moves above the discharge hole 364, it will fall freely into the interior of the collection frame 363, preventing the damaged fuse from falling inside or around the equipment, avoiding interference with the operation of the equipment by the fuse, and also avoiding the step of manually removing the damaged fuse, thus minimizing the risk of electric shock as much as possible.

[0030] As Figure 6 and Figure 7 shown, a pushing component 37 for moving the fuse is provided on the inner surface of the collection frame 363. The pushing component 37 includes five rollers 371 rotatably mounted on the inner surface of the collection frame 363 near the bottom and a transmission shaft 375 fixed to the center of the lower surface of the rotating block 6. A transmission belt 373 is sleeved on the outer surface of the roller 371, and a gear 372 is fixedly connected to one side of the roller 371. A crown gear 374 is fixedly connected to the bottom of the transmission shaft 375.

[0031] One side of a roller 371 extends out of the interior of the collection frame 363 and is fixedly connected to a gear 372. The bottom of the transmission shaft 375 extends out of the interior of the installation frame 2. The crown gear 374 and the gear 372 are perpendicular to each other and meshed with each other.

[0032] When the fuse lands at one end inside the collection box 363, directly below the discharge hole 364, when the next fuse moves to the discharge hole 364, the previous fuse will block the fuse inside the installation groove 7 from moving out, causing the rotating block 6 to be stuck by the fuse. Therefore, when the next fuse is damaged and the rotating block 6 rotates to drive the damaged fuse to move towards the discharge hole 364, it simultaneously drives the transmission shaft 375 to rotate. The transmission shaft 375 drives the gear 372 to rotate through the crown gear 374. The gear 372 drives the roller 371 to rotate synchronously, driving the transmission belt 373 to move. The fuse that lands on the transmission belt 373 moves towards the other end of the collection box 363 along with the transmission belt 373, avoiding affecting the subsequent falling fuses. When the fuse that moves to the other end cannot move further, it will slide relative to the transmission belt 373 and will not hinder the movement of the transmission belt 373. After the collection box 363 is filled, the collection box 363 can be pulled out to one side and removed from the inside of the four second L-shaped plates 361 for centralized processing of the fuses.

[0033] As Figure 11 shown, the power connection component 8 includes insulating fixing cylinders 81 fixed on the upper and lower surfaces of the installation frame 2. The top of the insulating fixing cylinder 81 is fixed with a connection wire groove 82. A fixing bolt 83 is threadedly connected to the upper surface of the wire groove 82. A conductive plate 84 is fixedly connected to the inner top of the insulating fixing cylinder 81. A second spring 85 is fixedly connected to the bottom of the conductive plate 84. A contact piece 86 is fixedly connected to the bottom of the second spring 85.

[0034] The insulating fixing cylinder 81 is located directly above the opening 9. The inside of the insulating fixing cylinder 81 communicates with the inside of the opening 9. The contact piece 86 is connected to one end of the fuse inside the installation groove 7. The conductive plate 84 and the wire groove 82 are connected to each other through a conductive rod.

[0035] As Figure 9 and Figure 10 shown, a cooling component 4 for cooling the power connection component 8 is provided on the upper surface of the installation frame 2 around the insulating fixing cylinder 81. The cooling component 4 includes fixing pipes 41 fixed on the upper and lower surfaces of the installation frame 2, an air inlet 49 opened on the outer surface of the insulating fixing cylinder 81, and a temperature sensor 410 fixed on the inner surface of the insulating fixing cylinder 81. A first card slot 47 is opened on the upper surface of the fixing pipe 41. A magnetic ring 43 is fixedly connected to the outer surface of the fixing pipe 41. A metal movable cylinder 42 is sleeved on the outer surface of the fixing pipe 41. A cooling component is provided on the upper surface of the metal movable cylinder 42. A second card slot 48 is opened on one side of the lower surface of the metal movable cylinder 42. The inner bottom of the first card slot 47 and the inner top of the second card slot 48 are both arc-shaped. Rubber is provided on the inner surfaces of the first card slot 47 and the second card slot 48.

[0036] When inserting the wire through the first card slot 47 into the interior of the wire slot 82, turn the fixing bolt 83 to fix one end of the wire. After that, slip the metal movable cylinder 42 over the outer surface of the fixing tube 41, align the second card slot 48 with the wire and tightly fasten it outside the wire. The magnetic ring 43 adsorbs and fixes the metal movable cylinder 42, completing the double fixation of the wire, improving the stability of the wire connection. At the same time, rubber is provided on the inner surfaces of the first card slot 47 and the second card slot 48 to improve the sealing performance inside the fixing tube 41 and the metal movable cylinder 42.

[0037] The cooling component includes a liquid nitrogen tank 44 fixed on the upper surface of the metal movable cylinder 42. An electromagnetic valve 45 is provided on the outer surface of the liquid nitrogen tank 44. One end of the electromagnetic valve 45 is fixedly connected to a spray pipe 46. Both the electromagnetic valve 45 and the spray pipe 46 are located inside the metal movable cylinder 42.

[0038] When the contact piece 86 and the fuse are powered on and working, the temperature of the contact point will gradually rise. Excessive temperature may cause the surrounding insulating material to melt, thereby triggering a short circuit in the circuit. For this reason, the temperature sensor 410 continuously detects the temperature of the contact point between the contact piece 86 and the fuse. When the temperature exceeds the predetermined threshold, it will control the electromagnetic valve 45 to open for a certain period of time through the terminal device, and spray the liquid nitrogen inside the liquid nitrogen tank 44 through the spray pipe 46. The liquid nitrogen sprays out from the spray pipe 46 and quickly vaporizes and diffuses inside the fixing tube 41, cooling the inside of the fixing tube 41. The gas enters the interior of the insulating fixing cylinder 81 through the air inlet 49, quickly cooling the contact point between the contact piece 86 and the fuse. A stable temperature can reduce the risk of oxidation, corrosion or melting of the contact point, and extend the service life of the contact piece 86 and the fuse.

[0039] Usage method: First, turn on the stepping motor 5 to work. The stepping motor 5 drives the rotating block 6 to rotate counterclockwise, driving the fuse inside the installation slot 7 near the placement frame 31 to move. After the rotating block 6 rotates half a circle, the fuse inside the installation slot 7 accurately moves between the two electrical connectors 8, ensuring the accurate connection between the fuse and the electrical connectors 8. When the rotating block 6 moves, it drives one fuse, and the fuse inside the placement frame 31 is pushed by the first L-shaped plate 34 to approach the rotating block 6. When the next installation slot 7 moves to the placement frame 31, it will push the fuse inside the placement frame 31 into the interior of the installation slot 7 for filling, thus realizing automatic feeding. After a period of time, if the fuse is damaged, a new fuse needs to be installed again. The stepping motor 5 will drive the rotating block 6 to rotate one-sixth of a circle, and the damaged fuse will move synchronously with the rotating block 6. The rotating block 6 drives the damaged fuse to move towards the discharge hole 364. When the damaged fuse moves above the discharge hole 364, it will fall freely into the interior of the collection box 363. When the rotating block 6 rotates to drive the fuse to move towards the discharge hole 364, it simultaneously drives the transmission shaft 375 to rotate. The transmission shaft 375 drives the gear 372 to rotate through the crown gear 374. The gear 372 drives the roller 371 to rotate synchronously, driving the transmission belt 373 to move. The fuse on the transmission belt 373 moves towards the other end of the collection box 363, avoiding affecting the subsequent falling fuses.

[0040] When passing the circuit through the first card slot 47 and inserting it into the interior of the wire slot 82, turn the fixing bolt 83 to fix one end of the circuit. After that, slip the metal movable cylinder 42 over the outer surface of the fixing tube 41, align the second card slot 48 with the cable and tightly buckle it outside the cable. The magnetic ring 43 adsorbs and fixes the metal movable cylinder 42, completing the double fixation of the cable, improving the stability of the cable connection. At the same time, rubber is provided on the inner surfaces of the first card slot 47 and the second card slot 48 to improve the sealing inside the fixing tube 41 and the metal movable cylinder 42. Liquid nitrogen sprays out from the spray nozzle 46 and quickly vaporizes and diffuses inside the fixing tube 41 to cool the inside of the fixing tube 41. The gas enters the interior of the insulating fixing cylinder 81 through the air inlet 49 to quickly cool the contact point between the contact piece 86 and the fuse. When switching the fuse, the contact piece 86 slides on the surface of the rotating block 6. With the frustum-shaped design of the contact piece 86, when the rotating block 6 rotates, the edge of the mounting groove 7 contacts the outer surface of the contact piece 86, squeezing the contact piece 86 out of the interior of the mounting groove 7, preventing the contact piece 86 from getting stuck inside the mounting groove 7 and causing the rotating block 6 to be unable to rotate.

[0041] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A low-voltage safety power distribution cabinet circuit emergency protection device, including a mounting plate (1). One side of the mounting plate (1) is fixedly connected with a mounting frame (2). The upper surface of the mounting frame (2) is fixedly connected with a stepping motor (5). The output end of the stepping motor (5) is fixedly connected with a rotating block (6). An installation groove (7) is formed on the outer surface of the rotating block (6). Openings (9) are formed on the upper and lower surfaces of the inner part of the mounting frame (2) near the mounting plate (1). It is characterized in that: A feeding component (3) for quickly installing fuses is arranged on the outer surface of the mounting frame (2). The feeding component (3) includes a placement frame (31) fixed on the outer surface of the mounting frame (2) and a fixing plate (32) fixed at the edge of the upper surface of the mounting frame (2). A sliding groove (38) is formed on the upper surface of the placement frame (31). A sliding plate (35) is slidably connected inside the sliding groove (38). A first spring (33) is connected between the sliding plate (35) and the fixing plate (32). A first L-shaped plate (34) is slidably connected to the inner bottom of the sliding plate (35). The top of the first L-shaped plate (34) is fixedly connected with a pull rod (39).

2. The emergency protection device for the low-voltage safety power distribution cabinet circuit according to claim 1, wherein: Power connection components (8) are arranged on the upper and lower surfaces of the mounting frame (2) near the mounting plate (1). The top of the pull rod (39) penetrates through the inside of the sliding plate (35). The pull rod (39) and the sliding plate (35) slide relative to each other. An arc groove adapted to the fuse is arranged on one side of the first L-shaped plate (34). The stepping motor (5) is powered by a storage battery.

3. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 2, characterized in that: A removal component (36) for collecting waste fuses is arranged on the lower surface of the mounting frame (2). The removal component (36) includes four second L-shaped plates (361) fixed on the lower surface of the mounting frame (2) and a discharge hole (364) formed on one side of the inner bottom of the mounting frame (2). A convex edge (362) is slidably connected inside the second L-shaped plate (361). A collection box (363) is arranged inside the convex edge (362).

4. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 3, characterized in that: There are four groups of the second L-shaped plates (361). The second L-shaped plates (361) are located in pairs on one side and are symmetrically arranged. The upper surface of the collection box (363) is attached to the lower surface of the mounting frame (2). The discharge hole (364) is located above the collection box (363).

5. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 4, characterized in that: A pushing component (37) for moving the fuse is arranged on the inner surface of the collection box (363). The pushing component (37) includes five rollers (371) rotatably arranged near the bottom of the inner surface of the collection box (363) and a transmission shaft (375) fixed at the center of the lower surface of the rotating block (6). A transmission belt (373) is sleeved on the outer surface of the roller (371). A gear (372) is fixedly connected to one side of the roller (371). A crown gear (374) is fixedly connected to the bottom of the transmission shaft (375).

6. The emergency protection device for the low-voltage safety power distribution cabinet circuit according to claim 5, characterized in that: One side of the roller (371) extends out of the inside of the collection box (363) and is fixedly connected with a gear (372). The bottom of the transmission shaft (375) extends out of the inside of the mounting frame (2). The crown gear (374) is perpendicular to the gear (372), and the crown gear (374) meshes with the gear (372).

7. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 6, characterized in that: The power connection member (8) includes insulating fixing cylinders (81) fixed on the upper and lower surfaces of the mounting frame (2). A connection wire groove (82) is fixed on the top of the insulating fixing cylinder (81). A fixing bolt (83) is threadedly connected to the upper surface of the wire groove (82). A conductive plate (84) is fixedly connected to the inner top of the insulating fixing cylinder (81). A second spring (85) is fixedly connected to the bottom of the conductive plate (84). A contact piece (86) is fixedly connected to the bottom of the second spring (85).

8. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 7, characterized in that: The insulating fixing cylinder (81) is located directly above the opening (9). The inside of the insulating fixing cylinder (81) is in communication with the inside of the opening (9). One end of the fuse inside the mounting groove (7) is connected to the contact piece (86). The conductive plate (84) and the wire groove (82) are connected by a conductive rod.

9. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 8, characterized in that: A cooling component (4) for cooling the power connection member (8) is arranged around the insulating fixing cylinder (81) on the upper surface of the mounting frame (2). The cooling component (4) includes fixing tubes (41) fixed on the upper and lower surfaces of the mounting frame (2), an air inlet (49) opened on the outer surface of the insulating fixing cylinder (81), and a temperature sensor (410) fixed on the inner surface of the insulating fixing cylinder (81). A first card slot (47) is opened on the upper surface of the fixing tube (41). A magnetic ring (43) is fixedly connected to the outer surface of the fixing tube (41). A metal movable cylinder (42) is sleeved on the outer surface of the fixing tube (41). A cooling component is arranged on the upper surface of the metal movable cylinder (42). A second card slot (48) is opened on one side of the lower surface of the metal movable cylinder (42). The inner bottoms of the first card slot (47) and the second card slot (48) are both arc-shaped. Rubbers are arranged on the inner surfaces of the first card slot (47) and the second card slot (48).

10. An emergency protection device for a low-voltage safety power distribution cabinet circuit according to claim 9, characterized in that: The cooling component includes a liquid nitrogen tank (44) fixed on the upper surface of the metal movable cylinder (42). An electromagnetic valve (45) is arranged on the outer surface of the liquid nitrogen tank (44). A spray pipe (46) is fixedly connected to one end of the electromagnetic valve (45). The electromagnetic valve (45) and the spray pipe (46) are both located inside the metal movable cylinder (42).

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