Fuse compensation structure and compensation method of load end drawer type power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a fuse compensation structure and method of a load-end drawer type power distribution cabinet, and the structure comprises a box body which is internally provided with a plurality of groups of drawable drawers; the pulley is rotatably mounted on the drawer, and the pulley is in rolling fit with a guide piece arranged on the inner side of the box body, so that the drawer can be kept in a horizontal state; the side plate is arranged in the box body, an elastic triggering assembly capable of horizontally moving is arranged on the side plate, and the elastic triggering assembly is matched with an energy storage groove formed in the side plate, so that the elastic triggering assembly has the trend of actively moving towards the end part of a movement stroke; the lifting plate is arranged on the elastic triggering assembly in a sliding mode and connected with the side plate through a follow-up structure, the follow-up structure can drive the lifting plate to ascend or descend relative to the pulleys when the elastic triggering assembly acts, and the stability after the drawer is pulled open is improved.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution cabinets, and in particular to a fuse compensation structure and a compensation method of a load-end drawer-type power distribution cabinet. Background Art

[0002] The main function of a fuse is to protect the circuit from damage or even fire caused by overload or short circuit. When the current exceeds the specified value, it uses the heat generated by itself to melt the fuse, thereby disconnecting the current and achieving the protection effect. Fuses are widely used in high and low voltage power distribution systems, control systems, and electrical equipment as short circuit and overcurrent protectors.

[0003] In the existing fuse, when the line overcurrent causes the fuse to break, the line needs to be repaired in time, and the blown fuse needs to be replaced in time after the repair is completed so that the fuse can have the fusing function again. In this process, in order to ensure that the fuse is installed in place, the entire fuse generally needs to be disassembled, which undoubtedly increases the workload of the maintenance personnel. Summary of the invention

[0004] The purpose of the present invention is to provide a fuse compensation structure and compensation method for a load-end drawer-type power distribution cabinet to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Load end drawer type distribution cabinet, including:

[0007] A box body, wherein a plurality of groups of pull-out drawers are arranged in the box body;

[0008] A pulley is rotatably mounted on the drawer, and the pulley is rollingly matched with a guide member arranged inside the box body, so that the drawer can be kept in a horizontal state;

[0009] A side plate is arranged in the box body, and an elastic trigger component capable of horizontal movement is arranged on the side plate, and the elastic trigger component cooperates with an energy storage slot formed on the side plate to enable the elastic trigger component to have a tendency to actively move toward the end of the movement stroke;

[0010] The lifting plate is slidably arranged on the elastic trigger component and connected to the side plate through a follower structure. The follower structure can drive the lifting plate to rise or fall relative to the pulley when the elastic trigger component is actuated.

[0011] As a further solution of the present invention: the elastic trigger assembly includes an "L"-shaped follower, the follower is slidably connected to a horizontal groove No. 1 formed on the side plate, and a sliding connection portion is provided on the follower, and the sliding connection portion is slidably connected to the lifting plate;

[0012] The elastic trigger assembly also includes an elastic telescopic rod connected to the follower, and a first groove wheel is rotatably mounted on one end of the elastic telescopic rod away from the follower, and the first groove wheel can roll in the energy storage tank.

[0013] As a further solution of the present invention: the energy storage tank includes two No. 2 inclined grooves symmetrically arranged on the side plate, the two No. 2 inclined grooves are connected, and a turning part is formed at the connection between the two. After the No. 1 groove wheel moves through the turning part, the elastic telescopic rod can drive the follower to actively move along the length direction of the No. 1 horizontal groove.

[0014] As a further solution of the present invention: the follower structure includes a No. 2 horizontal groove and a No. 1 inclined groove arranged on the side plate, and the No. 1 convex shaft connected to the lifting plate can slide in the No. 2 horizontal groove and the No. 1 inclined groove to drive the lifting plate to move.

[0015] A fuse compensation structure, installed in a drawer as claimed in claim 1, comprising:

[0016] A mounting plate connected to the drawer, wherein a slide plate is slidably mounted on the mounting plate;

[0017] At least two groups of arc-shaped clamping members, the two groups of arc-shaped clamping members cooperate to fix the upper end of the fuse, and one group of the arc-shaped clamping members is fixed on the mounting plate;

[0018] A positioning and loading assembly is arranged on the slide plate, and the positioning and loading assembly includes a positioning structure and a transfer structure. The positioning structure is provided with two sets of driving wheels that can cooperate to clamp the fuse. The transfer structure can drive the driving wheels to rotate when the slide plate moves toward the arc-shaped clamping piece, so that the fuse is delivered to the arc-shaped clamping piece.

[0019] A supporting assembly is connected to the slide plate and another set of arc-shaped clamping members. When the slide plate moves upward, the supporting assembly can drive the two sets of arc-shaped clamping members to perform a separation action.

[0020] As a further solution of the present invention: the positioning structure comprises two retardation grooves symmetrically arranged on the slide plate, a slider is slidably installed in the retardation groove, and the slider is rotatably connected to the driving wheel;

[0021] The positioning structure further comprises a connecting plate parallel to the slide plate, the connecting plate is provided with a protrusion, and the protrusion can slide in a guide groove formed on the slide plate;

[0022] The connecting plate is connected to a No. 2 spring arranged on the sliding plate, and two No. 3 inclined grooves are symmetrically arranged on the connecting plate, and the No. 2 convex shaft arranged on the sliding block can slide in the No. 3 inclined groove.

[0023] As a further solution of the present invention: the transfer structure includes a ratchet wheel coaxially fixedly connected to the rotating shaft of one of the driving wheels, and the ratchet wheel is adapted to a ratchet plate arranged on the slide plate;

[0024] The ratchet plate is provided with an engaging groove along its length direction, and the engaging groove is rollingly connected with two No. 2 groove wheels rotatably mounted on the slider;

[0025] The ratchet plate is slidable in a guide member provided on the slide plate.

[0026] As a further solution of the present invention: the supporting assembly comprises a connecting plate fixedly connected to the arc-shaped clamping member, the connecting plate is connected to the elastic structure arranged on the mounting plate, and a third cam shaft is fixed to the connecting plate;

[0027] The top support assembly also includes a connecting frame fixedly connected to the slide plate, a follower plate is installed on the connecting frame, and a switching groove is provided on the follower plate for slidingly cooperating with the No. 3 cam shaft. When the follower plate follows the movement of the slide plate, the switching groove cooperates with the No. 3 cam shaft to drive the two arc-shaped clamping members to move relative to each other.

[0028] As a further solution of the present invention: the driving slot includes a fourth inclined slot, a third horizontal slot, a vertical slot and an extension slot arranged on the follower plate, and the vertical slot is collinear with the extension slot;

[0029] A reversing plate is rotatably mounted on one end of the fourth inclined slot away from the third horizontal slot.

[0030] The method for compensating a blown fuse using the fuse compensation structure comprises the following steps:

[0031] Step 1: In the initial state, the upper end of the fuse is clamped and fixed by two arc-shaped clamps. At this time, the slide is at the highest point of its travel under the traction of the fuse. When the fuse burns out due to excessive current, the slide falls under the action of gravity and the circuit is disconnected;

[0032] Step 2: Repair the line;

[0033] Step 3: After the line maintenance is completed, the slide plate is driven to move upward, and the transfer structure is activated to transfer the fuse between the two driving wheels further toward between the two arc-shaped clamping members;

[0034] Step 4: When the slide plate moves, the top support assembly will also move synchronously to separate the two arc-shaped clamping members from each other, so that the fuse wire clamped between the two arc-shaped clamping members after melting is separated from the arc-shaped clamping members;

[0035] Step 5: The slide plate continues to move until the fuse moves between the two arc-shaped clamping members, and at the same time, the supporting assembly drives the two arc-shaped clamping members to re-clamp the upper end of the fuse.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] When the drawer is pulled to the end of the stroke, the lifting plate cooperates with the follower to lock the pulley. On the one hand, it can prevent the drawer from being separated from the box body and falling due to excessive movement. On the other hand, the horizontal force acting on the drawer due to misoperation can be buffered by the No. 1 spring to prevent the box body from sliding, thereby improving the stability of the power distribution cabinet.

[0038] When the slide plate moves upward to drive the fuse toward the arc-shaped clamping piece, the driving wheel rotates so that the fuse can be further delivered toward the arc-shaped clamping piece, so as to ensure that when the slide plate moves to the end of the stroke, the fuse can be delivered between the two arc-shaped clamping pieces, so as to ensure that the arc-shaped clamping piece can effectively clamp the upper end of the fuse. At the same time, the two driving wheels can maintain symmetrical movement and can position the fuse to a certain extent, so as to ensure that when the fuse is delivered between the two arc-shaped clamping pieces, the fuse can be concentric with the circular area formed by the cooperation of the two arc-shaped clamping pieces, so as to improve the clamping stability.

[0039] After the inspection and maintenance of the line is completed, the sliding plate and the follower plate can be driven to move upward by pulling up the connecting frame, and the two arc-shaped clamping members are separated under the cooperation of the No. 3 cam and the No. 4 inclined groove, so that the upper part of the fuse that was originally clamped and fused by the two arc-shaped clamping members is separated from the arc-shaped clamping members, and after the fuse is delivered to the predetermined position, the No. 3 cam will be reset along the No. 3 horizontal groove, and the upper part of the fuse will be clamped again, so as to realize automatic compensation of the fuse and avoid the tedious operation caused by replacing the fuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a structural schematic diagram of an embodiment of a load-side drawer-type power distribution cabinet.

[0041] Figure 2 The figure is a schematic diagram of the side structure of a drawer in one embodiment of a drawer-type power distribution cabinet at the load end.

[0042] Figure 3 This is an exploded view of the side panel and elastic trigger assembly of the drawer-type distribution cabinet at the load end.

[0043] Figure 4The figure is a structural schematic diagram of an embodiment of a fuse compensation structure.

[0044] Figure 5 This is a schematic structural diagram from another angle in an embodiment of a fuse compensation structure.

[0045] Figure 6 An exploded view of a positioning structure in an embodiment of a fuse compensation structure.

[0046] Figure 7 This is a schematic structural diagram of a top support assembly in an embodiment of a fuse compensation structure.

[0047] Figure 8 The figure is a schematic diagram of the planar structure of a follower plate in one embodiment of a fuse compensation structure.

[0048] Fig. 9 An exploded view of a transfer structure in one embodiment of a fuse compensation structure.

[0049] In the figure: 1, box; 2, drawer; 3, mounting plate; 301, through groove; 4, pulley; 5, guide; 6, side plate; 601, horizontal groove No. 1; 602, horizontal groove No. 2; 603, inclined groove No. 1; 604, inclined groove No. 2; 7, follower; 701, sliding connection; 8, lifting plate; 801, convex shaft No. 1; 9, follower sleeve; 10, spring No. 1; 11, telescopic shaft; 12, groove wheel No. 1; 13, slide plate; 1301, guide groove; 1302, hysteresis groove; 14, connecting plate; 1401, inclined groove No. 3; 1402 , protrusion; 15, No. 2 cam shaft; 16, slider; 17, driving wheel; 18, No. 2 spring; 19, ratchet; 20, ratchet plate; 2001, fitting groove; 21, No. 2 groove wheel; 22, guide member; 23, connecting frame; 2301, abutment portion; 24, follower plate; 2401, No. 4 inclined groove; 2402, No. 3 horizontal groove; 2403, vertical groove; 2404, extension groove; 2405, reversing plate; 25, connecting plate; 2501, No. 3 cam shaft; 26, arc-shaped clamping member; 27, horizontal axis; 28, No. 3 spring; 29, buzzer. DETAILED DESCRIPTION

[0050] 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.

[0051] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0052] See also Figures 1 to 9 In the embodiment of the present invention, the load-end drawer-type power distribution cabinet includes: a box body 1, a pulley 4, a side plate 6 and a lifting plate 8, so that when the drawer 2 is pulled to the end of the stroke, the lifting plate 8 cooperates with the follower 7 to lock the pulley 4. On the one hand, it can prevent the drawer 2 from moving excessively and separating from the box body 1 and falling. On the other hand, the horizontal force acting on the drawer 2 due to misoperation can be buffered by the No. 1 spring 10, thereby preventing the box body 1 from sliding and improving the stability of the power distribution cabinet.

[0053] The details are as follows: a plurality of groups of pull-out drawers 2 are arranged in the box body 1;

[0054] The pulley 4 is rotatably mounted on the drawer 2, and the pulley 4 rolls with the guide 5 arranged on the inner side of the box body 1, so that the drawer 2 can be kept in a horizontal state, wherein pulleys 4 are arranged on both sides of the drawer 2. Specifically, a group of pulleys 4 is arranged on the upper part of the side of the drawer 2, and three groups of pulleys 4 are arranged on the lower part, and the three groups of pulleys 4 are arranged separately, two groups of which are close and the other group is farther away, and two groups of guides 5 are arranged in the box body 1, and the two groups of guides 5 are respectively rolled and abutted with the pulleys 4 arranged on the upper and lower parts of the drawer 2. When the drawer 2 is fully pulled out, the two groups of pulleys 4 close to each other and the upper pulley 4 abut against the two groups of guides 5, and the three pulleys 4 form a triangular supporting structure, so that the stability of the drawer 2 is better after it is pulled out. Further, the guide 5 is provided with a deep groove along its length direction, and the pulley 4 can roll in the deep groove, so as to avoid lateral displacement of the pulley 4 during movement, prevent the drawer 2 from rubbing or interfering with the structure in the box body 1, and make the drawer 2 smoother when pulled out.

[0055] The side plate 6 is arranged in the box body 1, and an elastic trigger component capable of horizontal movement is arranged on the side plate 6. The elastic trigger component cooperates with the energy storage groove formed on the side plate 6, so that the elastic trigger component has a tendency to actively move toward the end of the movement stroke. In detail, the energy storage groove includes two No. 2 inclined grooves 604 symmetrically arranged on the side plate 6, and the two No. 2 inclined grooves 604 are connected, and a turning part is formed at the connection between the two. After the No. 1 groove wheel 12 moves through the turning part, the elastic telescopic rod can drive the follower 7 to actively move along the length direction of the No. 1 horizontal groove 601;

[0056] The elastic trigger assembly includes an "L"-shaped follower 7, the follower 7 is slidably connected to a horizontal groove 601 formed on the side plate 6, and a sliding connection portion 701 is provided on the follower 7, and the sliding connection portion 701 is slidably connected to the lifting plate 8;

[0057] The elastic trigger assembly also includes an elastic telescopic rod connected to the follower 7, and a No. 1 groove wheel 12 is rotatably installed at one end of the elastic telescopic rod away from the follower 7, and the No. 1 groove wheel 12 can roll in the energy storage tank. Specifically, the elastic telescopic rod includes a follower sleeve 9 fixedly connected to the follower 7, and a telescopic shaft 11 is slidably installed in the follower sleeve 9. The telescopic shaft 11 is rotatably connected to the No. 1 groove wheel 12, and the telescopic shaft 11 is connected to a No. 1 spring 10 arranged in the follower sleeve 9.

[0058] When the drawer 2 is pulled to move toward the outside of the box body 1, the upper pulley 4 will move toward the follower 7, and when the upper pulley 4 is about to move to the end of the stroke, the pulley 4 will first abut against the follower 7 and drive the follower 7 to move synchronously. At this time, the follower sleeve 9 connected to the follower 7 will also follow the movement of the pulley 4, thereby driving the No. 1 groove wheel 12 to move along one of the No. 2 inclined grooves 604 through the telescopic shaft 11, so that the No. 1 spring 10 is compressed, and when the No. 1 groove wheel 12 moves to the end of the No. 2 inclined groove 604 and moves through the turning part, the No. 1 spring 10 will release its elastic potential energy and actively drive the No. 1 groove wheel 12 to move along the other No. 2 inclined groove 604. At this time, the follower 7 will move to the end along the length direction of the No. 1 horizontal groove 601 and form a stop position to prevent the pulley 4 from moving excessively, causing the drawer 2 to separate from the box body 1 and causing the drawer 2 to fall.

[0059] The lifting plate 8 is slidably arranged on the elastic trigger component and is connected to the side plate 6 through a follower structure. The follower structure can drive the lifting plate 8 to rise or fall relative to the pulley 4 when the elastic trigger component is actuated. The follower structure includes a No. 2 horizontal groove 602 and a No. 1 inclined groove 603 arranged on the side plate 6. The No. 1 convex shaft 801 connected to the lifting plate 8 can slide in the No. 2 horizontal groove 602 and the No. 1 inclined groove 603 to drive the lifting plate 8 to move.

[0060] In the initial state, the height of the upper end of the lifting plate 8 is lower than the height of the lowest point of the upper pulley 4, so that when the drawer 2 drives the pulley 4 to move, the pulley 4 will not directly abut against the lifting plate 8, but will directly cross the lifting plate 8 and abut against the follower 7. When the follower 7 is driven by the pulley 4 to move, the lifting plate 8 will follow the follower 7 to move horizontally, and the No. 1 cam 801 will also move along the No. 1 inclined groove 603. In the process of the lifting plate 8 moving horizontally, the lifting plate 8 will move upward. Before the No. 1 groove wheel 12 moves to the turning part, the No. 1 cam 801 has moved to the end of the No. 1 inclined groove 603. At this time, the follower 7 cooperates with the lifting plate 8 to stop both sides of the pulley 4. Then the drawer 2 continues to be pulled, and after the No. 1 groove wheel 12 passes the turning part, the lifting plate 8 can actively drive the pulley 4 to move to the end of the stroke. During this process, the No. 1 cam 801 slides in the No. 2 horizontal groove 602 to make the height of the lifting plate 8 constant, and when the No. 1 groove wheel 12 passes the turning part and moves to the end of the other No. 2 inclined groove 604, the follower 7 and the lifting plate 8 have a tendency to maintain this state, and can lock the pulley 4 to a certain extent, thereby improving the stability after the drawer 2 is fully pulled out.

[0061] In the prior art, mechanical forced locking is mostly used after the drawer 2 is fully pulled out, so that the drawer 2 has higher stability when the components in the drawer 2 are inspected and replaced. However, this forced locking makes the drawer 2 and the box body 1 a hard link. When an external force acts on the drawer 2, it may cause the box body 1 to shake. In the present embodiment, when an external force acts on the drawer 2, the No. 1 spring 10 can store potential energy to cushion the movement of the drawer 2 to a certain extent, thereby avoiding the shaking of the box body 1 and improving the stability of the box body 1.

[0062] When the drawer 2 is pushed to move toward the box body 1, the above-mentioned pulley 4 will act on the lifting plate 8 to make the lifting plate 8 and the follower 7 move in the opposite direction until the No. 1 groove wheel 12 moves through the turning part, and the follower 7 will actively drive the pulley 4 to move. At the same time, the No. 1 cam 801 will return to the No. 1 inclined groove 603, and the height of the lifting plate 8 will gradually decrease to the reset position. After that, the drawer 2 can be manually pushed until it enters the box body 1.

[0063] Through the above arrangement, when the drawer 2 is pulled to the end of the stroke, the lifting plate 8 cooperates with the follower 7 to lock the pulley 4. On the one hand, it can prevent the drawer 2 from moving excessively and causing it to separate from the box body 1 and fall. On the other hand, the horizontal force acting on the drawer 2 due to improper operation can be buffered by the No. 1 spring 10, thereby preventing the box body 1 from sliding and improving the stability of the distribution cabinet.

[0064] See also Figures 4 to 9As an embodiment of the present invention, a fuse compensation structure is also proposed, which is installed in the drawer 2 and includes: a mounting plate 3, at least two sets of arc-shaped clamping members 26, a positioning and loading assembly, and a top support assembly.

[0065] The mounting plate 3 is connected to the drawer 2, and a through slot 301 is provided on the mounting plate 3, and a slide plate 13 is slidably installed in the through slot 301;

[0066] The two groups of arc-shaped clamping members 26 cooperate to fix the upper end of the fuse, and one group of the arc-shaped clamping members 26 is fixed on the mounting plate 3, and an incoming wiring terminal is provided on the arc-shaped clamping member 26, and an outgoing wiring terminal is also provided on the mounting plate 3, and the outgoing wiring terminal is connected to the mounting plate 3, and the arc portion of the end of the outgoing wiring terminal fits the fuse, so that the current can smoothly move from the incoming wiring terminal to the outgoing wiring terminal through the fuse;

[0067] The positioning and loading assembly is arranged on the slide plate 13, and the positioning and loading assembly includes a positioning structure and a transfer structure. The positioning structure is provided with two sets of driving wheels 17 that can cooperate to clamp the fuse. When the slide plate 13 moves toward the arc-shaped clamping member 26, the transfer structure can drive the driving wheels 17 to rotate, so that the fuse is delivered to the arc-shaped clamping member 26.

[0068] The positioning structure includes two retardation grooves 1302 symmetrically arranged on the slide plate 13, and a slider 16 is slidably installed in the retardation groove 1302, and the slider 16 is rotatably connected with the driving wheel 17. It should be noted that a damping sleeve is arranged at the rotating shaft of the driving wheel 17, and the damping sleeve can ensure that when one end of the fuse is fixed, the driving wheel 17 will not cause the slide plate 13 to fall due to autonomous rotation;

[0069] The positioning structure further includes a connecting plate 14 parallel to the slide plate 13, and a protrusion 1402 is provided on the connecting plate 14, and the protrusion 1402 can slide in a guide groove 1301 formed on the slide plate 13;

[0070] The connecting plate 14 is connected to the No. 2 spring 18 provided on the slide plate 13, and two No. 3 inclined grooves 1401 are symmetrically provided on the connecting plate 14, and the No. 2 convex shaft 15 provided on the slide block 16 can slide in the No. 3 inclined grooves 1401;

[0071] The transfer structure includes a ratchet wheel 19 coaxially fixedly connected to the rotating shaft of one of the driving wheels 17, and the ratchet wheel 19 is adapted to a ratchet plate 20 provided on the slide plate 13;

[0072] The ratchet plate 20 is provided with an engaging groove 2001 along its length direction, and the engaging groove 2001 is rollingly connected with two second groove wheels 21 rotatably mounted on the slider 16, wherein the ratchet plate 20 is provided with a clamping member connected with the ratchet plate 20 through an elastic sheet;

[0073] The ratchet plate 20 can slide in a guide member 22 provided on the slide plate 13 .

[0074] In the initial state, the two sets of arc-shaped clamping members 26 cooperate to clamp the upper part of the fuse. At this time, due to the presence of the damping sleeve, the driving wheel 17 will not rotate, and the slide plate 13 will be in a suspended state. At the same time, under the action of the gravity of the slide plate 13, the slider 16, the driving wheel 17 and other structures, the fuse can be in a straightened state, so that the outlet terminal can better fit the fuse to ensure the normal flow of current.

[0075] When an overcurrent occurs in the circuit, the fuse will automatically blow to avoid damage to the power-control components in the circuit. After the fuse blows, the slide plate 13 will lose the traction of the fuse and, under the action of gravity, drive the drive wheel 17 downward. At this time, the ratchet 19 will not engage with the ratchet plate 20, so that the drive wheel 17 can remain in a non-rotating state.

[0076] The line will then be inspected and after the inspection is completed, the slide 13 is manually pulled upward. During this process, the fuse clamped by the two driving wheels 17 will move upward synchronously, and when the ratchet 19 engages with the ratchet plate 20, the driving wheel 17 is driven to rotate, so that the fuse can move toward the slide 13, and when the slide 13 moves to the end of the stroke, the fuse can be delivered between the two arc-shaped clamps 26. Based on the above principle, when the slide 13 moves upward to drive the fuse toward the arc-shaped clamp 26, the driving wheel 17 rotates to allow the fuse to be further delivered toward the arc-shaped clamp 26, so as to ensure that when the slide 13 moves to the end of the stroke, the fuse can be delivered between the two arc-shaped clamps 26, so as to ensure that the arc-shaped clamp 26 can effectively clamp the upper end of the fuse.

[0077] Furthermore, the No. 2 cam 15 cooperates with the No. 3 inclined groove 1401 to enable the two sliders 16 to move closer to or away from each other, and the movement direction of the connecting plate 14 is perpendicular to the movement direction of the slider 16, so that when the connecting plate 14 moves, the two sliders 16 can move symmetrically. At the same time, under the traction of the No. 2 spring 18, the connecting plate 14 can be pulled to ensure that the two sliders 16 have a tendency to approach each other, so that the fuse can be abutted and clamped, and can clamp the fuse within a certain diameter range. On the one hand, when the driving wheel 17 rotates, the fuse can be driven to move. On the other hand, the fuse can be positioned to a certain extent to ensure that when the fuse is delivered between the two arc-shaped clamps 26, the fuse can be concentric with the circular area formed by the cooperation of the two arc-shaped clamps 26, that is, it has a certain positioning effect.

[0078] Through the above arrangement, when the slide plate 13 moves upward to drive the fuse toward the arc-shaped clamping member 26, the driving wheel 17 rotates so that the fuse can be further delivered toward the arc-shaped clamping member 26, so as to ensure that when the slide plate 13 moves to the end of the stroke, the fuse can be delivered between the two arc-shaped clamping members 26, so as to ensure that the arc-shaped clamping member 26 can effectively clamp the upper end of the fuse. At the same time, the two driving wheels 17 can maintain symmetrical movement and can position the fuse to a certain extent, so as to ensure that when the fuse is delivered between the two arc-shaped clamping members 26, the fuse can be concentric with the circular area formed by the cooperation of the two arc-shaped clamping members 26, thereby improving the clamping stability.

[0079] See also Figure 5 , Figure 7 , Figure 8 The top support assembly connects the slide plate 13 and another group of the arc-shaped clamping members 26. When the slide plate 13 moves upward, the top support assembly can drive the two groups of the arc-shaped clamping members 26 to perform a separation action. The top support assembly includes a connecting plate 25 fixedly connected to the arc-shaped clamping members 26, and the connecting plate 25 is connected to an elastic structure provided on the mounting plate 3, and a No. 3 cam shaft 2501 is fixed on the connecting plate 25, wherein the elastic structure includes a transverse shaft 27 provided on the mounting plate 3, and the transverse shaft 27 is slidably connected to the connecting plate 25, and a No. 3 spring 28 is sleeved on the transverse shaft 27, and one end of the No. 3 spring 28 is connected to the connecting plate 25, and the other end is connected to the end of the transverse shaft 27;

[0080] The supporting assembly further comprises a connecting frame 23 fixedly connected to the slide plate 13, a follower plate 24 is mounted on the connecting frame 23, and a switching groove slidably matched with the third cam shaft 2501 is provided on the follower plate 24. When the follower plate 24 follows the movement of the slide plate 13, the switching groove cooperates with the third cam shaft 2501 to drive the two arc-shaped clamping members 26 to move relative to each other;

[0081] The connecting frame 23 is also formed with an abutment portion 2301, and the abutment portion 2301 is adapted to the buzzer 29 provided on the mounting plate 3;

[0082] Furthermore, the driving slot includes a fourth inclined slot 2401, a third horizontal slot 2402, a vertical slot 2403 and an extension slot 2404 provided on the follower plate 24, and the vertical slot 2403 and the extension slot 2404 are colinear;

[0083] A reversing plate 2405 is rotatably mounted on one end of the fourth inclined slot 2401 away from the third horizontal slot 2402 , and the reversing plate 2405 is connected to the follower plate 24 via an elastic sheet.

[0084] After the fuse is blown, the slide plate 13 will move downward, at which time the abutment portion 2301 on the connecting frame 23 abuts against the buzzer 29 and can trigger the buzzer 29 to sound, thereby reminding the staff to perform immediate maintenance.

[0085] After the fuse is blown and the line is overhauled, the connecting frame 23 is pushed upward, and the slide plate 13 and the follower plate 24 will also move upward. In the process of the follower plate 24 moving upward, the third cam 2501 will move along the extension groove 2404, and after the third cam 2501 moves to the end of the extension groove 2404, the third cam 2501 will move toward the fourth inclined groove 2401 under the action of the reversing plate 2405. At this time, the third cam 2501 will drive one of the arc clamping members 26 to move away from the other arc clamping member 26 through the connecting plate 25, so that the arc clamping member 26 that was originally clamped by the two arc clamping members 26 and fused will be moved to the fourth inclined groove 2401. The upper part of the fuse is separated from the arc-shaped clamping piece 26, and as the slide plate 13 and the follower plate 24 continue to rise, the distance between the two arc-shaped clamping pieces 26 will gradually increase. When the fuse is delivered between the two arc-shaped clamping pieces 26, the No. 3 cam 2501 just moves to the end of the No. 4 inclined groove 2401. At this time, the No. 3 spring 28 releases its elastic potential energy, which enables the No. 3 cam 2501 to move along the No. 3 horizontal groove 2402, so that the two arc-shaped clamping pieces 26 move closer to each other to complete the clamping of the upper end of the fuse. At this time, the compensation for the fuse is completed, avoiding the cumbersome operation caused by the replacement of the fuse.

[0086] After the fuse blows, the slide plate 13 and the follower plate 24 will move downward. At this time, the third cam 2501 will move along the vertical groove 2403 to the end of the extension groove 2404, and when it abuts against the reversing plate 2405, it will drive the reversing plate 2405 to deflect. After the two are separated, the reversing plate 2405 will be reset under the action of the elastic sheet.

[0087] Through the above arrangement, after the inspection and maintenance of the line is completed, the slide plate 13 and the follower plate 24 can be driven to move upward by pulling up the connecting frame 23, and with the cooperation of the No. 3 cam 2501 and the No. 4 inclined groove 2401, the two arc-shaped clamping members 26 are separated, so that the upper part of the fuse that was originally clamped and fused by the two arc-shaped clamping members 26 is separated from the arc-shaped clamping members 26, and after the fuse is delivered to the predetermined position, the No. 3 cam 2501 will be reset along the No. 3 horizontal groove 2402, and clamp the upper part of the fuse again, so as to realize automatic compensation of the fuse and avoid the tedious operation caused by replacing the fuse.

[0088] The method for compensating a blown fuse using the fuse compensation structure comprises the following steps:

[0089] Step 1: In the initial state, the upper end of the fuse is clamped and fixed by two arc-shaped clamping members 26. At this time, the slide plate 13 is at the high point of its travel under the traction of the fuse. When the fuse burns out due to excessive current, the slide plate 13 falls under the action of gravity and the circuit is disconnected;

[0090] Step 2: Repair the line;

[0091] Step 3: After the line maintenance is completed, the slide plate 13 is driven to move upward, and the transfer structure is activated to transfer the fuse between the two driving wheels 17 further toward between the two arc-shaped clamping members 26;

[0092] Step 4: When the slide plate 13 moves, the supporting assembly will also move synchronously to separate the two arc-shaped clamping members 26 from each other, so that the fuse wire clamped between the two arc-shaped clamping members 26 after melting is separated from the arc-shaped clamping members 26;

[0093] Step 5: The slide plate 13 continues to move until the fuse moves between the two arc-shaped clamping members 26, and at the same time, the supporting assembly drives the two arc-shaped clamping members 26 to re-clamp the upper end of the fuse.

[0094] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0095] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The fuse compensation structure of the drawer-type distribution cabinet at the load end is characterized by: Installed in the drawer (2) of the drawer-type power distribution cabinet at the load end, comprising: A mounting plate (3) connected to the drawer (2), a slide plate (13) being slidably mounted on the mounting plate (3); At least two groups of arc-shaped clamping members (26), the two groups of arc-shaped clamping members (26) cooperate to fix the upper end of the fuse, and one group of the arc-shaped clamping members (26) is fixed on the mounting plate (3); A positioning and loading assembly is arranged on the slide plate (13), the positioning and loading assembly comprises a positioning structure and a transfer structure, the positioning structure is provided with two sets of driving wheels (17) which can cooperate to clamp the fuse, and the transfer structure can drive the driving wheels (17) to rotate when the slide plate (13) moves toward the arc-shaped clamping member (26), so that the fuse is delivered to the arc-shaped clamping member (26); The supporting assembly connects the slide plate (13) and another group of arc-shaped clamping members (26). When the slide plate (13) moves upward, the supporting assembly can drive the two groups of arc-shaped clamping members (26) to perform a separation action.

2. The fuse compensation structure of the load-side drawer-type power distribution cabinet according to claim 1 is characterized in that The positioning structure comprises two retardation grooves (1302) symmetrically arranged on the slide plate (13), a slider (16) is slidably installed in the retardation groove (1302), and the slider (16) is rotationally connected to the driving wheel (17); The positioning structure further comprises a connecting plate (14) parallel to the sliding plate (13), the connecting plate (14) being provided with a protrusion (1402), and the protrusion (1402) being capable of sliding in a guide groove (1301) formed on the sliding plate (13); The connecting plate (14) is connected to a No. 2 spring (18) arranged on the sliding plate (13), and two No. 3 inclined grooves (1401) are symmetrically arranged on the connecting plate (14), and the No. 2 convex shaft (15) arranged on the sliding block (16) can slide in the No. 3 inclined groove (1401).

3. The fuse compensation structure of the load-end drawer-type power distribution cabinet according to claim 2 is characterized in that: The transfer structure comprises a ratchet wheel (19) coaxially fixedly connected to the rotating shaft of one of the driving wheels (17), and the ratchet wheel (19) is adapted to a ratchet plate (20) arranged on the slide plate (13); The ratchet plate (20) is provided with an engaging groove (2001) along its length direction, and the engaging groove (2001) is rollingly connected with two No. 2 groove wheels (21) rotatably mounted on the slider (16); The ratchet plate (20) is capable of sliding in a guide member (22) provided on the slide plate (13).

4. The fuse compensation structure of the load-side drawer-type power distribution cabinet according to claim 1 is characterized in that: The supporting assembly comprises a connecting plate (25) fixedly connected to the arc-shaped clamping member (26), the connecting plate (25) being connected to an elastic structure arranged on the mounting plate (3), and a third cam shaft (2501) being fixed on the connecting plate (25); The supporting assembly further comprises a connecting frame (23) fixedly connected to the slide plate (13), a follower plate (24) being mounted on the connecting frame (23), and a switching groove slidably matched with the third cam shaft (2501) being provided on the follower plate (24). When the follower plate (24) follows the movement of the slide plate (13), the switching groove cooperates with the third cam shaft (2501) to drive the two arc-shaped clamping members (26) to move relative to each other.

5. The fuse compensation structure of the load-end drawer-type power distribution cabinet according to claim 4 is characterized in that: The driving groove comprises a fourth inclined groove (2401), a third horizontal groove (2402), a vertical groove (2403) and an extension groove (2404) arranged on the follower plate (24), wherein the vertical groove (2403) and the extension groove (2404) are colinear; A reversing plate (2405) is rotatably mounted on one end of the fourth inclined groove (2401) away from the third horizontal groove (2402).

6. A method for compensating a blown fuse using the fuse compensation structure of a load-side drawer-type power distribution cabinet as claimed in claim 1, characterized in that: The following steps are involved: Step 1: In the initial state, the upper end of the fuse is clamped and fixed by two arc-shaped clamping members (26), and at this time, the slide plate (13) is at the highest point of its travel under the traction of the fuse, and when the fuse burns out due to excessive current, the slide plate (13) falls under the action of gravity and the circuit is disconnected; Step 2: Repair the line; Step 3: After the line maintenance is completed, the slide plate (13) is driven to move upward, and the transfer structure is activated to transfer the fuse between the two driving wheels (17) further toward between the two arc-shaped clamping members (26); Step 4: When the slide plate (13) moves, the supporting assembly will also move synchronously to separate the two arc-shaped clamping members (26) from each other, thereby separating the fuse wire clamped between the two arc-shaped clamping members (26) after melting from the arc-shaped clamping members (26); Step 5: The slide plate (13) continues to move until the fuse moves between the two arc-shaped clamping members (26), and at the same time, the supporting assembly drives the two arc-shaped clamping members (26) to re-clamp the upper end of the fuse.

Images