Efficient current-limiting power distribution switch for power distribution terminal

Abstract

The invention discloses a high-efficiency current-limiting power distribution switch for a power distribution terminal, and relates to the technical field of power distribution switches, the high-efficiency current-limiting power distribution switch comprises an electric box, an electric brake is fixedly mounted in the electric box, a circuit breaker is fixedly mounted in the electric box, a switch is rotatably mounted on the surface of the electric brake, and the high-efficiency current-limiting power distribution switch also comprises a protection device and a fire extinguishing device; wherein the protection device comprises a carrying plate, a protection cover, a sliding plate, a sleeve rod, a limiting rod, a Z-shaped sheet and an abutting plate, the carrying plate is fixedly installed on the inner wall of the electric box, the protection cover is rotatably installed on the surface of the carrying plate, the sliding plate is slidably installed on the inner wall of the electric box, and the sleeve rod is fixedly installed at the top of the sliding plate; the limiting rod is fixedly installed at the bottom of the sliding plate, thrust is applied to the protective cover through the Z-shaped piece, the protective cover is automatically opened after limiting is correctly relieved, a good operation space can be provided, and maintenance is more convenient and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution switches, and in particular to a high-efficiency current-limiting power distribution switch for a power distribution terminal. Background Art

[0002] High-efficiency current-limiting distribution switch is a key device used in power systems. Its main function is to protect power equipment and lines from damage such as overload or short circuit.

[0003] The patent with patent announcement number CN113708224B relates to a high-efficiency current-limiting distribution switch for distribution terminals, relates to the technical field of distribution switches, solves the problem that the existing distribution switches cannot prevent electricians from operating in violation of regulations, and the switches cannot be disassembled and wired for maintenance and replacement without power outage, and cannot effectively suppress the occurrence of electric shock accidents. A high-efficiency current-limiting distribution switch for distribution terminals includes a main switch; the main switch is large in size and is locked and installed in the middle position of the upper and lower parts of the back plate of the electrical box, and three current-limiting switches are conductively connected to the main switch through cables, and two swing cover plates are symmetrically installed on the front positions of the upper and lower ends of the current-limiting switch; the main switch includes a hexagonal vertical support shaft, and two hexagonal vertical support shafts are symmetrically fixed on the left and right sides of the main switch. All the swing cover plates of the patent can be driven in linkage using the up and down toggle force of the main switch toggle handle, eliminating the trouble of manually rotating the switch swing cover plate, and the use is convenient, labor-saving and quick.

[0004] In the above patent, all the swing covers can be driven in linkage by the toggle handle of the main switch. Two swing covers are symmetrically rotated and installed at the front positions of the upper and lower ends of the current limiting switch, which saves the time of manual rotation of the switch swing cover and effectively improves work efficiency. However, the swing cover is directly installed on the main switch and the current limiting switch, which occupies the area of ​​the main switch and the current limiting switch, resulting in the space for the operator to operate being limited, thereby affecting the efficiency and safety of the operation. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-efficiency current-limiting distribution switch for a distribution terminal, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-efficiency current-limiting distribution switch for a distribution terminal, comprising an electrical box, a switch fixedly installed inside the electrical box, a circuit breaker fixedly installed inside the electrical box, a switch rotatably installed on the surface of the switch, and a protective device and a fire extinguishing device; wherein the protective device comprises a carrying plate, a protective cover, a slide plate, a sleeve rod, a limit rod, a Z-shaped piece and a stop plate, the rotation of the protective cover drives the Z-shaped piece to move in a direction away from the circuit breaker, and the movement of the Z-shaped piece drives the stop plate to rotate in a direction away from the circuit breaker, the carrying plate is fixedly installed on the inner wall of the electrical box, the protective cover is rotatably installed on the surface of the carrying plate, the slide plate is slidably installed on the inner wall of the electrical box, the sleeve rod is fixedly installed on the top of the slide plate, the limit rod is fixedly installed on the bottom of the slide plate, the movement of the slide plate drives the sleeve rod to move downward, and at the same time, the movement of the slide plate drives the limit rod to move downward, the Z-shaped piece is fixedly installed on the surface of the protective cover close to the electrical box, the stop plate is fixedly installed on the surface of the Z-shaped piece close to the electrical box, and the sleeve rod contacts the top of the switch.

[0007] According to the above technical solution, a spring is arranged between the slide plate and the electrical box, and the stretched spring restores to drive the slide plate to move downward. A hole groove is provided on the top of the protective cover, and the limit rod is in contact with the inner wall of the hole groove. During the movement, the limit rod is separated from the surface in contact with the hole groove of the protective cover, so that the limit imposed by the limit rod on the protective cover is released, the Z-shaped sheet is elastic, and the support plate is in contact with the inner wall of the electrical box.

[0008] According to the above technical solution, the fire extinguishing device includes a gas tank, a long rod nozzle, a circular plate, a shrinkage block, a mounting plate, a fuse, a T-shaped plate, a paddle plate and an L-shaped rod. The circular plate contacts the top of the T-shaped plate during movement, so that the movement of the circular plate drives the T-shaped plate to move downward, and the movement of the T-shaped plate drives the paddle plate to move downward. The gas tank is fixedly installed on the top of the inner wall of the electrical box, the long rod nozzle rotates and penetrates the inner and outer walls of the gas tank, the circular plate is slidably installed on the inner wall of the gas tank, the shrinkage block slides and penetrates the surface of the circular plate, and the end of the shrinkage block away from the circular plate slides and penetrates The surface of the gas tank, the surface of the shrinkage block in contact with the gas tank is separated during the movement, so that the limit imposed by the shrinkage block on the circular plate is released, the mounting plate is fixedly mounted on the surface of the gas tank, the fuse is fixedly mounted on the surface of the mounting plate close to the shrinkage block, the end of the fuse away from the mounting plate is fixedly mounted on the surface of the shrinkage block, the T-shaped plate slides through the surface of the gas tank, the paddle plate is fixedly mounted on the surface of the T-shaped plate, the L-shaped rod is fixedly mounted on the surface of the long rod nozzle, carbon dioxide is arranged inside the gas tank, and a pressure valve is arranged inside the long rod nozzle.

[0009] According to the above technical solution, a spiral spring No. 1 is arranged between the long rod nozzle and the gas tank, a spring No. 2 is arranged between the circular plate and the gas tank, the stretched spring No. 2 is restored to drive the circular plate to move downward, and the circular plate squeezes the carbon dioxide inside the gas tank during the movement, a spring No. 3 is arranged between the contraction block and the circular plate, the fuse burns out, causing the stretched spring No. 3 to restore and drive the contraction block to move toward the circular plate, and a spring No. 4 is arranged between the T-shaped plate and the gas tank.

[0010] According to the above technical scheme, the ventilation device includes a fixed frame, a rotating shaft, a baffle, a gear, a lifting plate, a door-shaped plate, a hollow plate and a telescopic plate. The rotation of the gear drives the rotating shaft to rotate, and the rotation of the rotating shaft drives the baffle to rotate. When the baffle rotates to a specified position, the fixed frame is closed. The fixed frame is fixedly passed through the surface of the electric box, the rotating shaft is rotatably installed on the inner wall of the fixed frame, the baffle is fixedly installed on the surface of the rotating shaft, the gear is fixedly installed on the surface of the rotating shaft, the lifting plate is slidably installed on the inner wall of the fixed frame, the door-shaped plate is fixedly installed on the top of the lifting plate, the hollow plate is fixedly installed on the inner wall of the fixed frame, the telescopic plate slides through the inside of the hollow plate, and a tooth block 1 is fixedly installed on the surface of the lifting plate. The movement of the door-shaped plate drives the lifting plate to move downward, and the tooth block 1 of the lifting plate contacts and meshes with the gear during the movement, so that the movement of the lifting plate drives the gear to rotate.

[0011] According to the above technical solution, a No. 2 scroll spring is arranged between the rotating shaft and the fixed frame, a limiting groove is provided on the lifting plate, and the telescopic plate contacts the limiting groove of the lifting plate during the movement, so that the telescopic plate applies a limiting force to the lifting plate, and an arc surface 1 is provided on the surface of the telescopic plate close to the lifting plate. The lifting plate contacts the arc surface 1 of the telescopic plate during the movement, so that the lifting plate applies a thrust to the telescopic plate, and a spring 5 is arranged between the telescopic plate and the hollow plate.

[0012] According to the above technical solution, the wire bundling device includes a round tube, a short plate, a contact block, a rubber plate, a rotating plate and a clamping plate. The movement of the rubber plate drives the rotating plate to move in the direction of the wire, and the movement of the rotating plate drives the clamping plate to move in the direction of the wire. The round tube is fixedly installed on the top of the circuit breaker, the short plate slides through the inner and outer walls of the round tube, the contact block is fixedly installed on the surface of the short plate away from the round tube, the rubber plate is fixedly installed on the surface of the short plate, the rotating plate rotates and penetrates the surface of the rubber plate, the clamping plate is fixedly installed on the surface of the rotating plate, and the surface of the contact block away from the short plate is provided with an arc surface 2, the arc surface 2 is in contact with the hole groove of the protective cover, and the hole groove of the protective cover is in contact with the arc surface 2 of the contact block during the movement, so that the rotation of the protective cover drives the contact blocks to move toward each other.

[0013] According to the above technical solution, a spring six is ​​arranged between the short plate and the round tube, and the movement of the contact block drives the short plates to move toward each other. The short plates stretch the spring six during the movement. A No. 3 spiral spring is arranged between the rotating plate and the rubber plate. The rotating plate stretches the No. 3 spiral spring during the rotation. An arc surface three is provided on the surface of the clamping plate away from the short plate.

[0014] The present invention provides a high-efficiency current-limiting distribution switch for a distribution terminal. It has the following beneficial effects: (1) The high-efficiency current-limiting distribution switch used in the distribution terminal has a limit rod that separates from the hole slot when moving, so that the limit imposed by the limit rod on the protective cover is released. The protective cover can be opened for operation only after the power switch is turned off, thereby avoiding irregular and dangerous behaviors of operators and helping to improve safety at work. The Z-shaped piece applies a thrust to the protective cover during the recovery process. By applying a thrust to the protective cover through the Z-shaped piece, the protective cover is automatically opened after the limit is correctly released, which can provide a good operating space and make maintenance more convenient and efficient.

[0015] (2) The high-efficiency current-limiting distribution switch used in the distribution terminal releases the limit imposed on the circular plate when the retracting block moves. When the fuse is burned out, carbon dioxide is automatically sprayed into the inside of the wire, which can quickly and effectively suppress the development of the fire. The rotation of the L-shaped rod drives the long rod nozzle to rotate. The rotation of the long rod nozzle is achieved through intermittent contact between the paddle plate and the L-shaped rod, thereby increasing the range of carbon dioxide and improving the fire extinguishing efficiency.

[0016] (3) The high-efficiency current-limiting distribution switch used in the distribution terminal has a baffle that rotates when the shaft rotates. When the baffle rotates to the specified position, it closes the fixed frame. When a fire occurs, the fixed frame is automatically closed, effectively blocking the external oxygen from entering the interior of the electrical box through the fixed frame, thereby controlling the development of the fire. When the telescopic plate moves, it contacts the limit groove, so that the telescopic plate applies a limit to the lifting plate. By limiting the lifting plate, the baffle is prevented from rotating to form a gap, ensuring that the electrical box is isolated from the outside, thereby improving the fire extinguishing effect.

[0017] (4) The high-efficiency current-limiting distribution switch used in the distribution terminal has a rubber plate that contacts the wire when it moves, so that the rubber plate clamps the wire. By clamping the wire with the rubber plate, the operator cannot directly pull out the wire to perform irregular operations when the protective cover is in use, thereby improving the accuracy of the work. The arc surface of the clamping plate contacts the wire when it moves. By installing a rotating plate and a clamping plate on both sides of the rubber plate, it is effectively adapted to clamp wires of different radii, thereby improving the clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the protective device of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the internal structure of the fire extinguishing device of the present invention; Figure 5 It is a schematic diagram of the shrinkage block and the circular plate structure of the present invention; Figure 6 It is a schematic diagram of the internal structure of the ventilation device of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of the internal structure of the wire harness device of the present invention; Fig. 9 For the present invention Figure 8 Enlarged structural diagram at point C in the middle.

[0019] In the figure: 1. electric box; 2. switch; 3. circuit breaker; 4. mounting plate; 5. protective cover; 6. slide plate; 7. sleeve rod; 8. limit rod; 9. Z-shaped plate; 10. abutment plate; 111. gas tank; 112. long rod nozzle; 113. round plate; 114. contraction block; 115. mounting plate; 116. fuse; 117. T-shaped plate; 118. paddle plate; 119. L-shaped rod; 121. fixing frame; 122. rotating shaft; 123. baffle; 124. gear; 125. lifting plate; 126. door-shaped plate; 127. hollow plate; 128. telescopic plate; 131. round tube; 132. short plate; 133. contact block; 134. rubber plate; 135. rotating plate; 136. clamping plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-5An embodiment of the present invention is: a high-efficiency current-limiting distribution switch for a distribution terminal, comprising an electrical box 1, a switch 2 is fixedly installed inside the electrical box 1, a circuit breaker 3 is fixedly installed inside the electrical box 1, a switch is rotatably installed on the surface of the switch 2, and a protective device and a fire extinguishing device are also included; wherein the protective device comprises a carrying plate 4, a protective cover 5, a slide plate 6, a sleeve rod 7, a limit rod 8, a Z-shaped piece 9 and a stop plate 10, the carrying plate 4 is fixedly installed on the inner wall of the electrical box 1, the protective cover 5 is rotatably installed on the surface of the carrying plate 4, the slide plate 6 is slidably installed on the inner wall of the electrical box 1, the sleeve rod 7 is fixedly installed on the top of the slide plate 6, the limit rod 8 is fixedly installed on the bottom of the slide plate 6, the Z-shaped piece 9 is fixedly installed on the surface of the protective cover 5 close to the electrical box 1, the stop plate 10 is fixedly installed on the surface of the Z-shaped piece 9 close to the electrical box 1, the sleeve rod 7 is in contact with the top of the switch, and the limit of the protective cover 5 is automatically released after the electrical switch 2 is closed, so as to avoid the operator from operating in violation of the specification during operation, and effectively improve the safety during work.

[0022] A spring is arranged between the slide plate 6 and the electrical box 1, a hole groove is opened on the top of the protective cover 5, the limit rod 8 is in contact with the inner wall of the hole groove, the Z-shaped piece 9 is elastic, and the abutment plate 10 is in contact with the inner wall of the electrical box 1. After closing the power switch 2, the Z-shaped piece 9 applies a thrust to the protective cover 5, so that the protective cover 5 automatically opens to facilitate the operator's work and effectively improve work efficiency.

[0023] The fire extinguishing device includes a gas cylinder 111, a long rod nozzle 112, a circular plate 113, a shrink block 114, a mounting plate 115, a fuse 116, a T-shaped plate 117, a paddle plate 118 and an L-shaped rod 119. The gas cylinder 111 is fixedly mounted on the top of the inner wall of the electric box 1, the long rod nozzle 112 rotates and penetrates the inner and outer walls of the gas cylinder 111, the circular plate 113 is slidably mounted on the inner wall of the gas cylinder 111, the shrink block 114 slides and penetrates the surface of the circular plate 113, the end of the shrink block 114 away from the circular plate 113 slides and penetrates the surface of the gas cylinder 111, the mounting plate 115 is fixedly mounted on the surface of the gas cylinder 111, the fuse 116 is fixed It is installed on the surface of the mounting plate 115 close to the shrink block 114, and one end of the fuse 116 away from the mounting plate 115 is fixedly mounted on the surface of the shrink block 114. The T-shaped plate 117 slides through the surface of the gas tank 111, the paddle plate 118 is fixedly mounted on the surface of the T-shaped plate 117, and the L-shaped rod 119 is fixedly mounted on the surface of the long-rod nozzle 112. Carbon dioxide is arranged inside the gas tank 111, and a pressure valve is arranged inside the long-rod nozzle 112. Through intermittent contact between the paddle plate 118 and the L-shaped rod 119, the long-rod nozzle 112 rotates back and forth when spraying carbon dioxide to increase the spray range, which helps to increase the discharge of carbon dioxide.

[0024] A first volute spring is arranged between the long-rod nozzle 112 and the gas tank 111, a second spring is arranged between the circular plate 113 and the gas tank 111, a third spring is arranged between the contraction block 114 and the circular plate 113, and a fourth spring is arranged between the T-shaped plate 117 and the gas tank 111. By sliding through the contraction block 114 on the circular plate 113, it is ensured that the limit of the circular plate 113 is automatically released in case of a fault, which helps the long-rod nozzle 112 to spray carbon dioxide smoothly.

[0025] When the embodiment is working, the switch is pulled and turned downward to turn off the switch 2. The resistance applied by the switch to the sleeve rod 7 during the rotation process gradually disappears, so that the stretched spring restores and drives the slide plate 6 to move downward, and the movement of the slide plate 6 drives the sleeve rod 7 to move downward. At the same time, the movement of the slide plate 6 drives the limit rod 8 to move downward. During the movement, the limit rod 8 is separated from the surface in contact with the hole groove of the protective cover 5, so that the limit applied by the limit rod 8 to the protective cover 5 is released. The protective cover 5 can be rotated only after the switch 2 is turned off, which effectively improves the safety during work. After the limit imposed on the circuit breaker 5 is released, the squeezed Z-shaped piece 9 recovers under the influence of its own elasticity. During the recovery process, the Z-shaped piece 9 applies a thrust to the protective cover 5, so that the protective cover 5 moves away from the circuit breaker 3 under the influence of the thrust. The rotation of the protective cover 5 drives the Z-shaped piece 9 to move away from the circuit breaker 3. The movement of the Z-shaped piece 9 drives the abutment plate 10 to rotate away from the circuit breaker 3. During the movement, the abutment plate 10 separates from the inner wall of the electric box 1. The Z-shaped piece 9 applies a thrust to the protective cover 5, which effectively improves the working efficiency. When a fire occurs due to leakage, the temperature inside the electrical box 1 rises, causing the fuse 116 to burn out under the influence of high temperature. The burning of the fuse 116 causes the stretched spring 3 to recover and drive the shrinking block 114 to move toward the circular plate 113. The surface of the shrinking block 114 in contact with the gas tank 111 is separated during the movement, so that the limit imposed by the shrinking block 114 on the circular plate 113 is released, and the stretched spring 2 recovers and drives the circular plate 113 to move downward. During the movement, the circular plate 113 squeezes the carbon dioxide inside the gas tank 111. During the squeezing process, the gas inside the gas tank 111 moves toward the inside of the long rod nozzle 112. When the air pressure inside the long rod nozzle 112 reaches a predetermined value, the carbon dioxide inside the long rod nozzle 112 pushes open the pressure valve and sprays out by sliding on the circular plate 113. The circular plate 113 penetrates the contraction block 114 to ensure that carbon dioxide is automatically ejected when a fault occurs. The circular plate 113 contacts the top of the T-shaped plate 117 during movement, so that the circular plate 113 moves and drives the T-shaped plate 117 to move downward. The T-shaped plate 117 stretches spring four during movement. At the same time, the movement of the T-shaped plate 117 drives the paddle plate 118 to move downward. The bottom of the paddle plate 118 contacts the top of the L-shaped rod 119 during movement, so that the paddle plate 118 moves and drives the L-shaped rod 119 to rotate. The L-shaped rod 119 stretches the No. 1 scroll spring during rotation. At the same time, the rotation of the L-shaped rod 119 drives the long rod nozzle 112 to rotate. The back and forth rotation of the long rod nozzle 112 is achieved through intermittent contact between the paddle plate 118 and the L-shaped rod 119, thereby effectively increasing the discharge range of carbon dioxide.

[0026] See also Figure 1-9 On the basis of the above embodiment, another embodiment of the present invention further includes a ventilation device and a wire bundling device; the ventilation device includes a fixed frame 121, a rotating shaft 122, a baffle 123, a gear 124, a lifting plate 125, a door-shaped plate 126, a hollow plate 127 and a telescopic plate 128, wherein the fixed frame 121 is fixedly penetrated through the surface of the electric box 1, the rotating shaft 122 is rotatably mounted on the inner wall of the fixed frame 121, the baffle 123 is fixedly mounted on the surface of the rotating shaft 122, the gear 124 is fixedly mounted on the surface of the rotating shaft 122, the lifting plate 125 is slidably mounted on the inner wall of the fixed frame 121, the door-shaped plate 126 is fixedly mounted on the top of the lifting plate 125, the hollow plate 127 is fixedly mounted on the inner wall of the fixed frame 121, the telescopic plate 128 slides through the inside of the hollow plate 127, and a tooth block 1 is fixedly mounted on the surface of the lifting plate 125. When a leakage fire occurs, the baffle 123 is automatically rotated to close the fixed frame 121, effectively blocking the supply of external oxygen, thereby reducing the fire.

[0027] A No. 2 scroll spring is arranged between the rotating shaft 122 and the fixed frame 121, a limiting groove is provided on the lifting plate 125, an arc surface 1 is provided on the surface of the telescopic plate 128 close to the lifting plate 125, and a spring 5 is arranged between the telescopic plate 128 and the hollow plate 127. The lifting plate 125 is limited by the telescopic plate 128 to ensure that the baffle 123 will not accidentally rotate to produce a gap, causing external air to enter the electrical box 1, thereby improving the fire extinguishing effect.

[0028] The wire harness device includes a round tube 131, a short plate 132, a contact block 133, a rubber plate 134, a rotating plate 135 and a clamping plate 136. The round tube 131 is fixedly mounted on the top of the circuit breaker 3, the short plate 132 slides through the inner and outer walls of the round tube 131, the contact block 133 is fixedly mounted on the surface of the short plate 132 away from the round tube 131, the rubber plate 134 is fixedly mounted on the surface of the short plate 132, the rotating plate 135 rotates and penetrates the surface of the rubber plate 134, the clamping plate 136 is fixedly mounted on the surface of the rotating plate 135, and an arc surface 2 is provided on the surface of the contact block 133 away from the short plate 132. The arc surface 2 contacts the hole groove of the protective cover 5, and the wires are clamped by the rubber plate 134, so that when the protective cover 5 is in the limit state, the operator cannot directly pull out the wires for dangerous operations, which helps to improve the safety during work.

[0029] A spring six is ​​arranged between the short plate 132 and the round tube 131, a spiral spring No. 3 is arranged between the rotating plate 135 and the rubber plate 134, and an arc surface three is provided on the surface of the clamping plate 136 away from the short plate 132. By installing a rotatable rotating plate 135 and a clamping plate 136 on both sides of the rubber plate 134, effective clamping of wires of different radii can be achieved, thereby improving the clamping effect.

[0030] When the present embodiment is working, the bottom of the T-shaped plate 117 contacts the top of the door-shaped plate 126 during the movement, so that the door-shaped plate 126 moves and drives the lifting plate 125 to move downward, and the tooth block of the lifting plate 125 contacts and meshes with the gear 124 during the movement, so that the lifting plate 125 moves and drives the gear 124 to rotate, and the rotation of the gear 124 drives the rotating shaft 122 to rotate, and the rotation of the rotating shaft 122 drives the baffle 123 to rotate, and the baffle 123 rotates to the specified position to close the fixed frame 121. By closing the fixed frame 121 when a leakage fire occurs, the supply of external oxygen can be blocked, and the lifting plate 125 contacts the arc surface of the telescopic plate 128 during the movement. The lifting plate 125 is in contact with the telescopic plate 128, so that the lifting plate 125 applies a thrust to the telescopic plate 128. The telescopic plate 128 moves toward the hollow plate 127 under the influence of the thrust. The telescopic plate 128 stretches the spring five during the movement. When the lifting plate 125 moves to the specified position, the contact surface of the telescopic plate 128 and the lifting plate 125 separates. The stretched spring five recovers and drives the telescopic plate 128 to move toward the lifting plate 125. The telescopic plate 128 contacts the limiting groove of the lifting plate 125 during the movement, so that the telescopic plate 128 applies a limit to the lifting plate 125. The lifting plate 125 is limited by the telescopic plate 128, ensuring that the baffle 123 will not be accidentally reset to cause external air to enter the electrical box 1; When connecting the wires, the connecting end of the wires is moved to the inside of the round tube 131, and the rotating protective cover 5 is rotated toward the circuit breaker 3. The hole groove of the protective cover 5 contacts the arc surface 2 of the contact block 133 during the movement, so that the rotation of the protective cover 5 drives the contact blocks 133 to move toward each other, and the movement of the contact blocks 133 drives the short plates 132 to move toward each other. The short plates 132 stretch the spring 6 during the movement, and at the same time, the movement of the short plates 132 drives the rubber plates 134 to move toward each other. The rubber plates 134 contact the surface of the wires during the movement, so that the rubber plates 134 contact the wires. The rubber plate 134 is used to clamp the wire to prevent the wire from accidentally falling off. The movement of the rubber plate 134 drives the rotating plate 135 to move toward the wire. The movement of the rotating plate 135 drives the clamping plate 136 to move toward the wire. The arc surface three of the clamping plate 136 contacts the surface of the wire during the movement, so that the rubber plate 134 continues to move to rotate the rotating plate 135. The rotating plate 135 stretches the No. 3 spiral spring during the rotation. The rotatable rotating plate 135 and the clamping plate 136 are installed on both sides of the rubber plate 134 to improve the clamping effect.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency current-limiting distribution switch for a power distribution terminal, comprising an electrical box (1), characterized in that: The electric box (1) has an electric switch (2) fixedly installed inside, a circuit breaker (3) fixedly installed inside, a switch rotatably installed on the surface of the electric switch (2), and also includes a protective device, a fire extinguishing device, a ventilation device and a wiring harness device; The protective device comprises a mounting plate (4), a protective cover (5), a slide plate (6), a sleeve rod (7), a limiting rod (8), a Z-shaped sheet (9) and a stop plate (10); the mounting plate (4) is fixedly mounted on the inner wall of the electric box (1); the protective cover (5) is rotatably mounted on the surface of the mounting plate (4); the slide plate (6) is slidably mounted on the inner wall of the electric box (1); the sleeve rod (7) is fixedly mounted on the top of the slide plate (6); the limiting rod (8) is fixedly mounted on the bottom of the slide plate (6); the Z-shaped sheet (9) is fixedly mounted on the surface of the protective cover (5) close to the electric box (1); the stop plate (10) is fixedly mounted on the surface of the Z-shaped sheet (9) close to the electric box (1); and the sleeve rod (7) contacts the top of the switch.

2. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 1, characterized in that: A spring is provided between the slide plate (6) and the electric box (1), a hole slot is provided on the top of the protective cover (5), the limit rod (8) contacts the inner wall of the hole slot, the Z-shaped sheet (9) is elastic, and the stop plate (10) contacts the inner wall of the electric box (1).

3. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 2, characterized in that: The fire extinguishing device comprises a gas tank (111), a long-rod nozzle (112), a circular plate (113), a shrinking block (114), a mounting plate (115), a fuse (116), a T-shaped plate (117), a paddle plate (118) and an L-shaped rod (119); the gas tank (111) is fixedly mounted on the top of the inner wall of the electrical box (1); the long-rod nozzle (112) rotates and penetrates the inner and outer walls of the gas tank (111); the circular plate (113) is slidably mounted on the inner wall of the gas tank (111); the shrinking block (114) slides and penetrates the surface of the circular plate (113); and the end of the shrinking block (114) away from the circular plate (113) slides and penetrates the inner wall of the gas tank (111). The mounting plate (115) is fixedly mounted on the surface of the gas tank (111), the fuse (116) is fixedly mounted on the surface of the mounting plate (115) close to the shrink block (114), one end of the fuse (116) away from the mounting plate (115) is fixedly mounted on the surface of the shrink block (114), the T-shaped plate (117) slides through the surface of the gas tank (111), the paddle plate (118) is fixedly mounted on the surface of the T-shaped plate (117), the L-shaped rod (119) is fixedly mounted on the surface of the long rod nozzle (112), the gas tank (111) is provided with carbon dioxide inside, and the long rod nozzle (112) is provided with a pressure valve inside.

4. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 3, characterized in that: A first volute spring is provided between the long-rod spray head (112) and the gas tank (111), a second spring is provided between the circular plate (113) and the gas tank (111), a third spring is provided between the contraction block (114) and the circular plate (113), and a fourth spring is provided between the T-shaped plate (117) and the gas tank (111).

5. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 4, characterized in that: The ventilation device comprises a fixed frame (121), a rotating shaft (122), a baffle (123), a gear (124), a lifting plate (125), a door-shaped plate (126), a hollow plate (127) and a telescopic plate (128); the fixed frame (121) is fixedly mounted on the surface of the electric box (1); the rotating shaft (122) is rotatably mounted on the inner wall of the fixed frame (121); the baffle (123) is fixedly mounted on the surface of the rotating shaft (122); the gear (124) is fixedly mounted on the surface of the rotating shaft (122); the lifting plate (125) is slidably mounted on the inner wall of the fixed frame (121); the door-shaped plate (126) is fixedly mounted on the top of the lifting plate (125); the hollow plate (127) is fixedly mounted on the inner wall of the fixed frame (121); the telescopic plate (128) slidably runs through the interior of the hollow plate (127); and a tooth block 1 is fixedly mounted on the surface of the lifting plate (125).

6. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 5, characterized in that: A second scroll spring is arranged between the rotating shaft (122) and the fixed frame (121); a limiting groove is provided on the lifting plate (128); an arc surface 1 is provided on the surface of the telescopic plate (128) close to the lifting plate (125); and a spring 5 is arranged between the telescopic plate (128) and the hollow plate (127).

7. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 6, characterized in that: The wire harness device comprises a round tube (131), a short plate (132), a contact block (133), a rubber plate (134), a rotating plate (135) and a clamping plate (136); the round tube (131) is fixedly mounted on the top of the circuit breaker (3); the short plate (132) slides through the inner and outer walls of the round tube (131); the contact block (133) is fixedly mounted on the surface of the short plate (132) away from the round tube (131); the rubber plate (134) is fixedly mounted on the surface of the short plate (132); the rotating plate (135) rotates and penetrates the surface of the rubber plate (134); the clamping plate (136) is fixedly mounted on the surface of the rotating plate (135); and a second arc surface is provided on the surface of the contact block (133) away from the short plate (132); the second arc surface contacts the hole groove of the protective cover (5).

8. The high-efficiency current-limiting distribution switch for a power distribution terminal according to claim 7, characterized in that: A spring six is ​​provided between the short plate (132) and the round tube (131), a spiral spring number three is provided between the rotating plate (135) and the rubber plate (134), and an arc surface three is provided on the surface of the clamping plate (136) away from the short plate (132).

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