A low-voltage safety distribution cabinet circuit emergency protection device

Abstract

The present invention discloses an emergency circuit protection device for a low-voltage safety distribution cabinet, which belongs to the field of electrical equipment. The device comprises a mounting plate, a mounting frame fixedly connected to one side of the mounting plate, a stepper motor fixedly connected to the upper surface of the mounting frame, and a rotary block fixedly connected to the output end of the stepper motor. Under the rotation of the rotary block, the fuse inside the mounting slot can be accurately moved between the two power connectors, ensuring the precise connection between the fuse and the power connector, avoiding offset 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 interior of the mounting slot for filling, thereby realizing automatic loading. The entire process avoids manual operation, reduces errors caused by manual operation, and greatly improves the safety of replacing the fuse.

Description

Technical Field

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

[0002] Low-voltage safety distribution cabinet circuit emergency protection devices are typically used to prevent damage or safety risks caused by faults or overloads in the circuit. This type of circuit emergency protection device is used to detect whether the current is passing through an abnormal path. The combination of these protection devices can effectively ensure the safe operation of the low-voltage safety distribution cabinet circuit.

[0003] The Chinese patent with authorization announcement number CN115206749B discloses a circuit emergency protection device for food processing equipment. Through the arrangement of a storage slot, an arc-shaped push plate and a spring C, a spare fuse can be stored in the storage slot. The spring C applies a thrust to the arc-shaped push plate to move the fuse to the top of the feed hole. When the storage cavity and the feed hole are connected, the U-shaped guide rod is pulled in the opposite direction, and the fuse inside the storage slot automatically falls into the storage cavity through the feed hole, making it easier to load the fuse inside the switching wheel. However, when replacing the fuse, the drive shaft is manually rotated to move the fuse to form a passage between the two power-connected metal parts. Manual rotation of the drive shaft will cause a certain deviation between the fuse and the two power-connected metal parts, resulting in a small contact area between the power-connected metal parts and one end of the fuse, causing excessive heat to be generated at the contact point between the fuse and the power-connected metal parts in a short period of time, causing the insulating material around the contact point to melt, and manual operation will increase the chance of electric shock, posing a great safety hazard. Summary of the Invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a low-voltage safety distribution cabinet circuit emergency protection device.

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

[0006] A circuit emergency protection device for a low-voltage safety distribution cabinet comprises a mounting plate, a mounting frame fixedly connected to one side of the mounting plate, a stepper motor fixedly connected to the upper surface of the mounting frame, a rotary block fixedly connected to the output end of the stepper motor, a mounting groove provided on the outer surface of the rotary block, openings provided on the upper and lower surfaces of the interior of the mounting frame near the mounting plate, and a loading assembly for quickly installing a fuse provided on the outer surface of the mounting frame.

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

[0008] Furthermore, power connection parts are provided on the upper and lower surfaces of the mounting frame near the mounting plate, the top of the pull rod passes through the interior of the skateboard, the pull rod and the skateboard slide against each other, and an arc groove adapted to the fuse is provided on one side of the first L-shaped plate, and the stepper motor is powered by a battery.

[0009] The lower surface of the mounting frame is provided with a fuse removal assembly for collecting discarded fuses. The removal assembly includes four second L-shaped plates fixed to the lower surface of the mounting frame and a discharge hole opened on one side of the bottom of the mounting frame. The interior of the second L-shaped plate is slidably connected to a convex edge, and the interior of the convex edge is provided with a collection frame.

[0010] Four groups of the second L-shaped plates are provided. The second L-shaped plates are located in pairs on one side and are axially symmetrical. The upper surface of the collection frame is fitted with the lower surface of the installation frame, and the discharge hole is located above the collection frame.

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

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

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

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

[0015] The upper surface of the mounting frame is located around the insulating fixed tube and is provided with a cooling component for cooling the docking electrical parts. The cooling component includes a fixed tube fixed on the upper and lower surfaces of the mounting frame, an air inlet opened on the outer surface of the insulating fixed tube, and a temperature sensor fixed on the inner surface of the insulating fixed tube. A first card slot is provided on the upper surface of the fixed tube, a magnetic ring is fixedly connected to the outer surface of the fixed tube, a metal movable tube is sleeved on the outer surface of the fixed tube, a cooling component is provided on the upper surface of the metal movable tube, and a second card slot is provided on one side of the lower surface of the metal movable tube. The inner bottom of the first card slot and the inner top of the second card slot are both arc-shaped, and the inner surfaces of the first card slot and the second card slot are both provided with rubber.

[0016] The cooling component includes a liquid nitrogen tank fixed on the upper surface of the metal movable cylinder. The outer surface of the liquid nitrogen tank is provided with a solenoid valve. One end of the solenoid valve is fixedly connected to a nozzle. The solenoid valve and the nozzle are both located inside the metal movable cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This solution is equipped with a loading assembly. Under the rotation of the rotating block, the fuse inside the installation slot is accurately moved between the two power connections, ensuring the precise connection between the fuse and the power connection, avoiding offset between the two, resulting in a small contact area and a sharp rise in heat. The first L-shaped plate will push the fuse inside the placement frame into the interior of the installation slot for filling, thereby realizing automatic loading. The entire process avoids manual operation, reduces errors caused by manual operation, and greatly improves the safety of fuse replacement.

[0019] 2. This solution is equipped with a removal component. If the fuse is damaged, the stepper motor will drive the rotary block to rotate one-sixth of a turn, and the rotary block will drive the damaged fuse to move toward the discharge hole. When the damaged fuse moves above the discharge hole, it will freely fall into the collection frame for collection, preventing the damaged fuse from falling inside or around the equipment, preventing the fuse from interfering with the operation of the equipment, and avoiding the steps of manually removing the damaged fuse, thereby minimizing the risk of electric shock.

[0020] 3. This solution is equipped with a pushing assembly. When the rotating block rotates to drive the damaged fuse to move to the discharge hole, it also drives the transmission shaft to rotate. The transmission shaft drives the gear to rotate through the crown gear. The gear drives the roller to rotate synchronously, driving the transmission belt to move. The fuse that falls on the transmission belt moves with the transmission belt to the other end of the collection frame, avoiding affecting the subsequent falling fuses. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 The cross-sectional structure of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 3 The cross-sectional structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 4 It is a schematic diagram of the placement frame structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified view of point A;

[0026] Figure 6 This is a schematic diagram of the dismantling assembly structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the cross-sectional structure of the collection frame of the present invention;

[0028] Figure 8 This is a schematic diagram of the discharge hole structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the fixed tube and the metal movable cylinder of the present invention;

[0030] Figure 10 This is a schematic diagram of the internal structure of the fixed tube of the present invention;

[0031] Figure 11 It is a schematic diagram of the structure of the power connection part of the present invention.

[0032] Description of the numbers in the figure:

[0033] 1. Mounting plate; 2. Mounting frame;

[0034] 3. Loading assembly; 31. Placement frame; 32. Fixing plate; 33. First spring; 34. First L-shaped plate; 35. Slide plate;

[0035] 36. Removal assembly; 361. Second L-shaped plate; 362. Protruding edge; 363. Collection frame; 364. Discharge hole;

[0036] 37. Push assembly; 371. Roller; 372. Gear; 373. Drive belt; 374. Crown gear; 375. Drive shaft;

[0037] 38. Slide; 39. Pull rod;

[0038] 4. Cooling assembly; 41. Fixed tube; 42. Metal movable cylinder; 43. Magnetic ring; 44. Liquid nitrogen tank; 45. Solenoid valve; 46. Nozzle; 47. First slot; 48. Second slot; 49. Air inlet; 410. Temperature sensor;

[0039] 5. Stepper motor; 6. Rotating block; 7. Mounting slot;

[0040] 8. Electrical connection piece; 81. Insulation fixing cylinder; 82. Wire duct; 83. Fixing bolt; 84. Conductive plate; 85. Second spring; 86. Contact piece;

[0041] 9. Open the hole. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 11 A circuit emergency protection device for a low-voltage safety distribution cabinet includes a mounting plate 1, a mounting frame 2 is fixedly connected to one side of the mounting plate 1, a stepper motor 5 is fixedly connected to the upper surface of the mounting frame 2, and a rotating block 6 is fixedly connected to the output end of the stepper motor 5. A mounting groove 7 is provided on the outer surface of the rotating block 6, and openings 9 are provided on the upper and lower surfaces of the interior of the mounting frame 2 near the mounting plate 1. A loading component 3 for quickly installing a fuse is provided on the outer surface of the mounting frame 2.

[0044] like Figure 3 、 Figure 4 and Figure 5 As shown, the loading assembly 3 includes a placement frame 31 fixed on the outer surface of the mounting frame 2 and a fixed plate 32 fixed at the edge of the upper surface of the mounting frame 2. A sliding groove 38 is provided on the upper surface of the placement frame 31. A slide plate 35 is slidably connected inside the sliding groove 38. A first spring 33 is connected between the slide plate 35 and the fixed plate 32. The inner bottom of the slide plate 35 is slidably connected to the first L-shaped plate 34. The top of the first L-shaped plate 34 is fixedly connected to a pull rod 39.

[0045] Power connection parts 8 are provided on the upper and lower surfaces of the mounting frame 2 near the mounting plate 1. The top of the pull rod 39 passes through the interior of the slide 35. The pull rod 39 and the slide 35 slide against each other. An arc groove adapted to the fuse is provided on one side of the first L-shaped plate 34. The stepper motor 5 is powered by a battery.

[0046] When the circuit fails and the fuse fails, the failed fuse needs to be replaced. The stepper motor 5 is turned on through the terminal to work. The stepper motor 5 drives the rotary block 6 to rotate counterclockwise, driving the fuse inside the mounting slot 7 near the placement frame 31 to move. After the rotary block 6 rotates half a circle, the fuse inside the mounting slot 7 is accurately moved to between the two electrical connections 8, ensuring the precise connection between the fuse and the electrical connection 8, avoiding offset between the two, resulting in a small contact area and a sharp rise in heat. At the same time, when the rotary block 6 moves, it drives a fuse, and the fuse inside the placement frame 31 is pushed close to the rotary block 6 by the first L-shaped plate 34. When the next mounting slot 7 moves to the placement frame 31, it will push the fuse inside the placement frame 31 into the interior of the mounting slot 7 for filling, thereby realizing automatic loading. The whole process avoids manual operation, reduces the error caused by manual operation, and greatly improves the safety of replacing the fuse.

[0047] When the fuse inside the placement frame 31 is used up, it needs to be added. At this time, the pull rod 39 is pulled to drive the first L-shaped plate 34 to move up to the inside of the slide groove 38, and the fuse is placed inside the placement frame 31. After placement, the slide plate 35 is pulled to drive the first L-shaped plate 34 to move to the end away from the fixed plate 32, and then the pull rod 39 is pressed downward to move the first L-shaped plate 34 to the inside of the placement frame 31. The slide plate 35 is released and under the pulling force of the first spring 33, the first L-shaped plate 34 is tightly in contact with and squeezed against the fuse.

[0048] like Figure 6-8 As shown, a fuse removal assembly 36 for collecting discarded fuses is provided on the lower surface of the mounting frame 2. The removal assembly 36 includes four second L-shaped plates 361 fixed to the lower surface of the mounting frame 2 and a discharge hole 364 opened on one side of the bottom of the mounting frame 2. The second L-shaped plates 361 are slidably connected to the inside of the second L-shaped plates 361, and a collection frame 363 is provided inside the convex edge 362.

[0049] Four groups of second L-shaped plates 361 are provided. The second L-shaped plates 361 are located in pairs on one side and are axially symmetrical. The upper surface of the collection frame 363 is in contact with the lower surface of the installation frame 2 , and the discharge hole 364 is located above the collection frame 363 .

[0050] 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 turn block 6 to rotate one-sixth of a circle, and the damaged fuse will move synchronously with the turn block 6. The turn block 6 drives the damaged fuse to move toward the discharge hole 364. When the damaged fuse moves to the top of the discharge hole 364, it will freely fall into the interior of the collection frame 363, preventing the damaged fuse from falling inside or around the equipment, preventing the fuse from interfering with the operation of the equipment, and avoiding the steps of manually removing the damaged fuse, thereby minimizing the risk of electric shock.

[0051] like Figure 6 and Figure 7 As shown, the inner surface of the collection frame 363 is provided with a pushing component 37 for moving the fuse. The pushing component 37 includes five rollers 371 rotating on the inner surface of the collection frame 363 near the bottom and a transmission shaft 375 fixed at the center of the lower surface of the rotating block 6. The outer surface of the roller 371 is provided with a transmission belt 373, one side of the roller 371 is fixedly connected to a gear 372, and the bottom of the transmission shaft 375 is fixedly connected to a crown gear 374.

[0052] 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 mounting frame 2. The crown gear 374 and the gear 372 are perpendicular to each other and mesh with each other.

[0053] When the fuse falls on one end of the interior of the collection frame 363, that is, 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 slot 7 from moving out, causing the rotating block 6 to be stuck by the fuse. Therefore, when the next fuse is damaged, the rotating block 6 rotates to drive the damaged fuse to move to the discharge hole 364, and at the same time drives the transmission shaft 375 to rotate. The transmission shaft 375 drives the gear 372 to rotate through the crown gear 374, and the gear 372 drives the roller 371 The synchronous rotation drives the transmission belt 373 to move, and the fuses that fall on the transmission belt 373 move along with the transmission belt 373 to the other end of the collection frame 363 to avoid affecting the subsequently falling fuses. When the fuses moved to the other end cannot continue to move, they will slide relative to the transmission belt 373 and will not hinder the movement of the transmission belt 373. After the collection frame 363 is full, the collection frame 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.

[0054] like Figure 11 As shown, the power connection member 8 includes an insulating fixed tube 81 fixed to the upper and lower surfaces of the mounting frame 2, the top of the insulating fixed tube 81 is fixedly connected to the wire groove 82, the upper surface of the wire groove 82 is threadedly connected with a fixing bolt 83, the top of the insulating fixed tube 81 is fixedly connected to a conductive plate 84, the bottom of the conductive plate 84 is fixedly connected to a second spring 85, and the bottom of the second spring 85 is fixedly connected to a contact piece 86.

[0055] The insulating fixing tube 81 is located directly above the opening 9 , the interior of the insulating fixing tube 81 is connected to the interior of the opening 9 , the contact piece 86 is connected to one end of the fuse inside the mounting slot 7 , and the conductive plate 84 and the wire slot 82 are connected to each other through a conductive rod.

[0056] like Figure 9 and Figure 10As shown, a cooling assembly 4 for cooling the docking electrical component 8 is provided around the insulating fixed cylinder 81 on the upper surface of the mounting frame 2. The cooling assembly 4 includes a fixed tube 41 fixed on the upper and lower surfaces of the mounting frame 2, an air inlet 49 provided on the outer surface of the insulating fixed cylinder 81, and a temperature sensor 410 fixed on the inner surface of the insulating fixed cylinder 81. A first card slot 47 is provided on the upper surface of the fixed tube 41, a magnetic ring 43 is fixedly connected to the outer surface of the fixed tube 41, a metal movable cylinder 42 is sleeved on the outer surface of the fixed tube 41, a cooling component is provided on the upper surface of the metal movable cylinder 42, and a second card slot 48 is provided 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, and the inner surfaces of the first card slot 47 and the second card slot 48 are both provided with rubber.

[0057] When the line is inserted into the wire groove 82 through the first card slot 47, the fixing bolt 83 is tightened to fix one end of the line. Thereafter, the metal movable cylinder 42 is put on the outer surface of the fixed tube 41, and the second card slot 48 is aligned with the cable and tightly buckled on the outside of the cable. The magnetic ring 43 adsorbs and fixes the metal movable cylinder 42, completing the double fixation of the cable and improving the stability of the cable connection. At the same time, the inner surfaces of the first card slot 47 and the second card slot 48 are provided with rubber to improve the sealing of the fixed tube 41 and the metal movable cylinder 42.

[0058] The cooling component includes a liquid nitrogen tank 44 fixed on the upper surface of the metal movable cylinder 42. A solenoid valve 45 is provided on the outer surface of the liquid nitrogen tank 44. One end of the solenoid valve 45 is fixedly connected to a nozzle 46. The solenoid valve 45 and the nozzle 46 are both located inside the metal movable cylinder 42.

[0059] When the contact piece 86 and the fuse are energized, the temperature of the contact point gradually rises. Excessive temperature can cause the surrounding insulating material to melt, leading to a short circuit. To this end, the temperature sensor 410 continuously monitors the temperature of the contact point between the contact piece 86 and the fuse. When the temperature exceeds a predetermined threshold, the terminal device controls the solenoid valve 45 to open for a certain period of time, spraying liquid nitrogen from the liquid nitrogen tank 44 through the nozzle 46. The liquid nitrogen sprayed from the nozzle 46 quickly vaporizes and diffuses inside the fixed tube 41, cooling the interior of the fixed tube 41. The gas enters the interior of the insulating fixed tube 81 through the air inlet 49, rapidly cooling the contact point between the contact piece 86 and the fuse. The stable temperature reduces the risk of oxidation, corrosion, or melting of the contact point, thereby extending the life of the contact piece 86 and the fuse.

[0060] Instructions for use: First, turn on the stepper motor 5 to work. The stepper motor 5 drives the rotary block 6 to rotate counterclockwise, driving the fuse inside the mounting slot 7 near the placement frame 31 to move. After the rotary block 6 rotates half a circle, the fuse inside the mounting slot 7 accurately moves between the two power connectors 8, ensuring the precise connection between the fuse and the power connector 8. When the rotary block 6 moves, it drives a fuse. The fuse inside the placement frame 31 is pushed by the first L-shaped plate 34 to approach the rotary block 6. When the next mounting slot 7 moves to the placement frame 31, it will push the fuse inside the placement frame 31 into the interior of the mounting slot 7 for filling, thereby realizing automatic loading.

[0061] After a period of time, if the fuse is damaged and a new fuse needs to be installed, the stepper motor 5 will drive the rotating block 6 to rotate one-sixth of a turn, and the damaged fuse will move synchronously with the rotating block 6. The rotating block 6 drives the damaged fuse to move toward the discharge hole 364. When the damaged fuse moves above the discharge hole 364, it will freely fall into the interior of the collection frame 363.

[0062] When the rotating block 6 rotates and drives the fuse to move toward the discharge hole 364, it also 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 falls on the transmission belt 373 moves along the transmission belt 373 to the other end of the collection frame 363 to avoid affecting the fuses that fall subsequently.

[0063] When the line is inserted into the interior of the wire groove 82 through the first card slot 47, the fixing bolt 83 is screwed to fix one end of the line. Thereafter, the metal movable cylinder 42 is sleeved on the outer surface of the fixed tube 41, and the second card slot 48 is aligned with the cable and tightly buckled on the outside of 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, the inner surfaces of the first card slot 47 and the second card slot 48 are both provided with rubber to improve the sealing of the fixed tube 41 and the metal movable cylinder 42. Liquid nitrogen is sprayed from The gas ejected from the tube 46 quickly vaporizes and diffuses inside the fixed tube 41, cooling the inside of the fixed tube 41. The gas enters the inside of the insulating fixed tube 81 through the air inlet 49, and quickly cools the contact point between the contact piece 86 and the fuse. When switching the fuse, the contact piece 86 will slide on the surface of the rotary block 6, and the contact piece 86 is designed in a frustum shape. When the rotary block 6 rotates, the edge of the mounting groove 7 contacts the outer surface of the contact piece 86, squeezing the contact piece 86 into the inside of the mounting groove 7, thereby preventing the contact piece 86 from being stuck in the mounting groove 7 and causing the rotary block 6 to be unable to rotate.

[0064] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A low-voltage safety distribution cabinet circuit emergency protection device, comprising a mounting plate (1), a mounting frame (2) fixedly connected to one side of the mounting plate (1), a stepper motor (5) fixedly connected to the upper surface of the mounting frame (2), a rotating block (6) fixedly connected to the output end of the stepper motor (5), a mounting groove (7) provided on the outer surface of the rotating block (6), and openings (9) provided on the upper and lower surfaces of the interior of the mounting frame (2) near the mounting plate (1); Its characteristics are: The outer surface of the installation frame (2) is provided with a loading assembly (3) for quickly installing the fuse; The loading assembly (3) comprises a placement frame (31) fixed on the outer surface of the installation frame (2) and a fixed plate (32) fixed at the edge of the upper surface of the installation frame (2); a slide groove (38) is provided on the upper surface of the placement frame (31); a slide plate (35) is slidably connected inside the slide groove (38); a first spring (33) is connected between the slide plate (35) and the fixed plate (32); the inner bottom of the slide plate (35) is slidably connected to a first L-shaped plate (34); and the top of the first L-shaped plate (34) is fixedly connected to a pull rod (39); The upper and lower surfaces of the mounting frame (2) are provided with power connection parts (8) near the mounting plate (1); the top of the pull rod (39) passes through the interior of the slide plate (35); the pull rod (39) and the slide plate (35) slide relative to each other; a circular arc groove adapted to the fuse is provided on one side of the first L-shaped plate (34); and the stepping motor (5) is powered by a battery; The lower surface of the installation frame (2) is provided with a removal assembly (36) for collecting discarded fuses, the removal assembly (36) comprising four second L-shaped plates (361) fixed to the lower surface of the installation frame (2) and a discharge hole (364) provided on one side of the bottom of the installation frame (2), the interior of the second L-shaped plate (361) is slidably connected to a convex edge (362), and the interior of the convex edge (362) is provided with a collection frame (363); Four groups of the second L-shaped plates (361) are provided, and the second L-shaped plates (361) are located on one side in pairs and are axially symmetrically arranged. The upper surface of the collection frame (363) is in contact with the lower surface of the installation frame (2), and the discharge hole (364) is located above the collection frame (363). The inner surface of the collection frame (363) is provided with a pushing assembly (37) for moving the fuse, the pushing assembly (37) comprising five rollers (371) rotating on the inner surface of the collection frame (363) near the bottom and a transmission shaft (375) fixed at the center of the lower surface of the rotating block (6), the outer surface of the roller (371) is sleeved with a transmission belt (373), one side of the roller (371) is fixedly connected to a gear (372), and the bottom of the transmission shaft (375) is fixedly connected to a crown gear (374); One side of the roller (371) extends out of the interior of the collecting frame (363) and is fixedly connected to a gear (372). The bottom of the transmission shaft (375) extends out of the interior of the mounting frame (2). The crown gear (374) and the gear (372) are perpendicular to each other and mesh with each other.

2. A low-voltage safety distribution cabinet circuit emergency protection device according to claim 1, characterized in that: The power connection member (8) comprises an insulating fixed cylinder (81) fixed to the upper and lower surfaces of the installation frame (2); the top of the insulating fixed cylinder (81) is fixedly connected to a wire groove (82); the upper surface of the wire groove (82) is threadedly connected to a fixing bolt (83); the top of the insulating fixed cylinder (81) is fixedly connected to a conductive plate (84); the bottom of the conductive plate (84) is fixedly connected to a second spring (85); and the bottom of the second spring (85) is fixedly connected to a contact piece (86).

3. A low-voltage safety distribution cabinet circuit emergency protection device according to claim 2, characterized in that: The insulating fixing cylinder (81) is located directly above the opening (9), the interior of the insulating fixing cylinder (81) and the interior of the opening (9) are in communication with each other, the contact piece (86) and one end of the fuse in the installation slot (7) are connected to each other, and the conductive plate (84) and the wire slot (82) are connected to each other via a conductive rod.

4. A low-voltage safety distribution cabinet circuit emergency protection device according to claim 3, characterized in that: The upper surface of the installation frame (2) is provided with a cooling assembly (4) for cooling the docking electrical component (8) around the insulating fixed cylinder (81). The cooling assembly (4) includes a fixed tube (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 fixed cylinder (81), and a temperature sensor (410) fixed on the inner surface of the insulating fixed cylinder (81). The upper surface of the fixed tube (41) is provided with a first slot (47). The outer surface of the fixed tube (41) is fixedly connected with a magnetic ring (43). The outer surface of the fixed tube (41) is sleeved with a metal movable cylinder (42). The upper surface of the metal movable cylinder (42) is provided with a cooling component. A second slot (48) is provided on one side of the lower surface of the metal movable cylinder (42). The inner bottom of the first slot (47) and the inner top of the second slot (48) are both arc-shaped. The inner surfaces of the first slot (47) and the second slot (48) are both provided with rubber.

5. A low-voltage safety distribution cabinet circuit emergency protection device according to claim 4, characterized in that: The cooling component comprises 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 nozzle (46); and both the electromagnetic valve (45) and the nozzle (46) are located inside the metal movable cylinder (42).

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