Intelligent electric drop-out fuse droop clutch structure

Abstract

When the fuse is in the closed state, the spring (1) is standing and the lower frame (3) is standing, so that the moving contact of the fuse tube is on the static contact nest. Once the electric push-pull rod (18) rotates the disc (11), the rotating cross arm (13) buckled by the cross beam (16) also rotates, and the end of the rotating cross arm (13) pushes down the force ring head (10). At this time, the front of the lower frame (3) is lowered until the limit head (5) of the lower bottom frame (2). At this time, the fuse tube on the static contact nest has been lowered to a certain height, and the fuse tube can be easily opened. When the electric drop type fuse is closed, the closing end of the rotating cross arm (13) has slid onto the inclined steps of the clutch disc (15), away from the force ring head (10) on the swing arm (9), and there is no blocking piece. At this time, if the fuse wire is fused due to line failure, the fuse tube can freely and smoothly drop, achieving the purpose of free drop.

Description

Technical Field

[0001] This invention belongs to the field of power automation and intelligent innovation, and specifically relates to the automation and intelligent innovation of drop-out fuses used in power distribution transformers to realize opening and closing operations. Background Technology

[0002] The operation of intelligent electric drop-out fuses is very easy when closing because the fuse tube has a relatively long stroke during the closing process, which has a certain impact force, making closing easy. However, the operation is different when opening. Because the moving contact of the fuse tube is deeply recessed in the stationary contact, there is a lot of resistance when opening. In addition, it is a static start-up without any impact force, so it is very difficult and makes opening difficult. This invention discloses an intelligent electric drop-out fuse droop clutch structure. When the circuit is electrically tripped, the drooping frame is lowered to a certain height, and the fuse tube installed on the drooping frame is also lowered to a certain height. After the moving contact of the fuse tube is lowered, it avoids the jamming surface. At this time, the fuse tube can easily trip the circuit. In order to ensure that the fuse falls freely and smoothly after the circuit breaker is closed, without being hindered by mechanical structures, the technical solution of this invention patent also creates a clutch structure, which effectively solves the problem of the fuse falling unfree. Summary of the Invention

[0003] This patent creates a fuse tripping drooping structure, which allows the fuse tube to droop down to a certain height first, thereby avoiding the jamming surface of the stationary contact, solving the problem of difficult electric tripping and also solving the problem of free fall. (1) Characteristics of the drooping structure: The drooping structure is mainly composed of a drooping frame, a drooping base frame, a return spring, etc. The hanging frame is made of metal and has a perforated bridge-shaped structure. Its waist is connected to the hanging base frame by a pin. The drooping base is made of metal and is screwed to the lower post of the fuse support. The waist of the drooping base is connected to the drooping frame by a pin, and the front end of the base serves as a limit when the circuit breaker is tripped and droops. The aforementioned return spring is made of stainless steel spring wire, and its U-shaped part is fastened by a spring buckle plate and fixed to the lower post of the drop-out fuse insulation support. The top of the two springs is the push head for the return of the drooping frame. The middle position of the return spring passes above the pin on the waist of the drooping frame, and the pin serves as the fulcrum of the elastic force. (2) Clutch structure features: The clutch structure consists of a clutch disc, a rotating disc, a rotating horizontal arm, a swing arm and other structures, which are fixed on the left side of the lower frame through the central shaft. The base disc is mounted face down on the left side of the lower bracket to provide a base for the installation of the clutch disc. The central hole of the swing arm is relatively large and is fitted onto the rear boss of the clutch disc. Outside the central hole is a large disc with a force ring welded to its edge. The other end of the swing arm is bent and screwed to the bottom of the lever. The clutch disc is disc-shaped and is fixed to the left side of the lower frame by screws through the base disc plate. One side of the clutch disc has a closing ramp and a discharging ramp, and a limiting platform is provided at the top of the ramp. The other side has a boss for the swing arm to rotate. The rotating cross arm has a large circular hole in the middle, which fits into the central shaft hole of the clutch disc. Each end of the cross arm has an end head, and a cross beam is provided not far from each end head. The cross beam fastens the cross arm to the rotating disc. A spring socket is provided not far from each cross beam. The rotating cross arm and the rotating disc are in a floating relationship by a floating spring. The rotating disk is the power turntable of the entire rotating machine. When the fuse is opened or closed, it is pushed or pulled by an electric push-pull rod. The center of the rotating disk is fixed on the left side of the hanging frame by a central shaft that connects the rotating cross arm and the swing arm together. Attached Figure Description

[0004] Appendix Figure 1 This is a technical diagram of the tripping, drooping, and closing clutch structure of an intelligent electric drop-out fuse according to the present invention. In the diagram: 1. Return spring; 2. Drooping base frame; 3. Drooping frame; 4. Drooping frame pin; 5. Limit head; 6. Right arm half-shaft; 7. Hook mounting hole; 8. Spring lifter; 9. Swing arm; 10. Force ring head; 11. Rotating disk; 12. Floating spring; 13. Rotating cross arm; 14. Central shaft; 15. Clutch disc; 16. Crossbeam; 17. Foundation disc plate; 18. Push-pull rod; 19. Spring buckle plate. Detailed Implementation

[0005] When the intelligent electric drop-out fuse is in the closed state, the return spring (1) in the attached diagram supports the drooping frame (3) so that the moving contact of the fuse tube is pressed against the stationary contact socket. Once the intelligent electric drop-out fuse is opened, the electric push-pull rod (18) rotates the rotating disk (11), and the rotating cross arm (13) fastened by the cross beam (16) also rotates. The opening end of the cross arm presses down the force ring head (10). At this time, the front of the drooping frame (3) hangs down until it reaches the limit head (5) of the drooping base frame (2). At this time, the moving contact of the fuse tube pressed against the stationary contact socket will hang down to a certain height, and the moving contact can avoid the blocking surface of the stationary contact socket. At this time, the fuse tube can be opened easily. When the intelligent electric drop-out fuse is closed, the electric push-pull rod (18) pushes the rotating disk (11) in the opposite direction, and the rotating horizontal arm (13) also reverses, pushing the closing force ring head to flip, so that the swing arm (9) pushes the fuse tube all the way to the closing position. At this time, the closing head of the rotating horizontal arm (13) has slid onto the ramp step of the disengagement disk (15), entered the limit platform, and left the force ring head (10) on the swing arm (9). There are no more obstructions below the force ring head (10). If the fuse tube encounters a line fault at this time, once the fuse wire melts, the fuse tube can fall freely and smoothly, achieving the purpose of free fall.

Claims

1. A smart electric drop-out fuse droop clutch structure, characterized in that: include: Return spring (1); drooping base frame (2); drooping frame (3); drooping frame pin (4); limit head (5); right arm half shaft (6); spring lifter (8); swing arm (9); force ring (10); rotating disk (11); floating spring (12); rotating cross arm (13); central shaft (14); clutch disc (15); span beam (16); foundation disc plate (17); spring buckle plate (19).

2. According to claim 1, the return spring (1) shown in the figure is made of stainless steel spring wire. The U-shaped part of the return spring (1) is fastened by the spring buckle plate (19) and installed together with the drooping base frame (2) on the lower pile head of the fuse insulation support. The return spring (1) extends from the position above the drooping frame pin (4) to the front opening of the drooping frame (3) as the spring head (8). The return spring (1) has a certain force to lift the front opening of the drooping frame (3) and can flatten the front opening of the drooping frame (3) under a certain weight. The middle position of the return spring (1) is above the pin (4) and uses the pin (4) as the fulcrum of the lifting force.

3. According to claim 1, the hanging frame (3) shown in the figure is made of metal material and is in the shape of an arch bridge. Steps are provided on both sides of its waist. The steps extend to both sides with a certain width. The waist position above the steps is pinned by the hanging base frame (2) by a pin. There is a certain vertical free movement space between the hanging frame (3) and the hanging base frame (2) so that it can swing freely up and down. Each side of the waist of the hanging frame (3) is provided with a pin hole and is pinned to the hanging base frame (2) by a pin (4).

4. According to claim 1, the drooping base frame (2) shown in the figure is made of metal material and is U-shaped with a flat bottom. It is installed inside the drooping frame (3). There should be a certain amount of space between the two outer sides of the drooping base frame (2) and the two inner sides of the drooping frame (3) so that they can move freely. The drooping base frame (2) is used as the base frame of the drooping frame (3). One end of the drooping base frame (2) is provided with an installation hole, which is installed on the lower pile head of the fuse insulation column together with the return spring buckle plate (19). The other end of the drooping base frame (2) is two limiting heads (5) for limiting the drooping frame (3) when it is drooping. There is a small hole on each side of the middle of the drooping frame (3) and a pin is connected to the drooping frame (3) through a pin shaft.

5. According to claim 1, the swing arm (9) described in the figure is made of plate-shaped metal material and is divided into left and right arms. The right swing arm is not shown in the figure. The part installed inside the rotating disk (11) is a disc shape with a circular hole in the middle. It is fitted on the hollow shaft of the clutch disk (15). A force ring is welded to the edge of the disc. The other end of the swing arm (9) is bent and connected to the lower end of the support rod (not shown in the figure).

6. According to claim 1, the rotating disk (11) shown in the figure is made of metal material and is in the shape of a disc. The central hole of the rotating disk is connected by a central shaft (14) to the rotating horizontal arm (13) and the swing arm (9). The central shaft (14) is installed on the left side of the hanging frame (3) through the central hole of the clutch disc (15). The two ends of the rotating horizontal arm (13) are fastened to the rotating disk (11) by the cross beam (16). The floating spring (12) floats between the rotating horizontal arm (13) and the rotating disk (11). One part of the rotating disk (11) is connected to the push-pull rod (18) by a screw.

7. According to claim 1, the rotating cross arm (13) in the figure is made of metal material, is in the shape of a carrying pole, has a large round hole in the middle, is fitted to the outside of the hollow round shaft of the clutch disc (15), and has a certain free gap with the hollow round shaft so that the rotating cross arm (13) can rotate freely. The two ends of the cross arm (13) are provided with end heads, which are used to push the force ring heads (10) at both ends of the swing arm (9) to rotate, so that the swing arm (9) can push the fuse tube to close and open the circuit breaker. The two ends of the rotating cross arm (13) are attached to the rotating disc (11) by the cross beam (16) with screws. There are spring sockets on the side of each socket, and each socket corresponding to the rotating disc (11) is equipped with a floating spring (12) so that it is floating with the rotating disc (11).

8. According to claim 1, the clutch disc (15) shown in the figure is made of metal material and is in the shape of a disc with a central hole in the middle. Outside the central hole is a hollow circular shaft for rotating the horizontal arm (13). The front of the clutch disc (15) faces the rotating disc (11). The clutch disc (15) has corresponding opening ramps and closing ramps around its perimeter. A limit platform is provided at the high point of the ramp. The back of the clutch disc (15) is a boss for rotating and positioning the swing arm (9). The clutch disc (15) is mounted on the left step surface of the lower frame (3) by screws passing through the base disc plate (17).

9. According to claim 1, the crossbeam (16) shown in the figure is made of thin material and is in the shape of an arch bridge. There are screw hole platforms on both sides for screw assembly. The rotating cross arm (13) is fastened to the rotating disk (11) by screws on the screw hole platforms on both sides. There is a certain free gap between the inner side of the crossbeam and the rotating cross arm (13) so that the rotating cross arm (13) can float freely when sliding up and down the slope of the clutch disk (15). There is a pair of crossbeams (16), which are fastened to the two ends of the rotating cross arm (13) at the required positions respectively.

10. According to claim 1, the spring retainer plate (19) shown in the figure is made of metal material in the shape of a number seven, and the bent number seven hook can stably hook the spring retainer (1), so that the spring retainer (1) will not move backward or jump outward.

11. According to claim 1, the right arm half shaft (6) shown in the figure is cylindrical and is used for positioning the right side swing arm (9).

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