Buffer device for quick switch

Abstract

The present invention discloses a buffer device for a quick switch, which includes a support flange. On one side of the support flange, relatively arranged holding brackets are fixedly connected. At the ends of the two holding brackets away from the support flange, rod seats are connected. At the end of the rod seat away from the holding bracket, a disc spring sleeve is fixedly connected, and a compression spring rod is sleeved in the disc spring sleeve. It also includes a buffer structure, which is fixedly connected to one side of the support flange. At one end of the buffer structure away from the support flange, a cross drive shaft is fixedly connected, and the opposite ends of the cross drive shaft are respectively connected to the ends of the compression spring rod. The present invention has convenient connection, simple equipment debugging and installation, small friction force during the transmission process, novel oil buffer structure, meets the action characteristics of the quick switch, maintains the integrated design of the buffer, has a simple overall structure and small occupied space, small friction force for the transmission of parts, and greatly improves the service life of the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical buffer devices, and particularly relates to a buffer device for a fast switch. Background Art

[0002] As a new type of power equipment, a fast switch can achieve rapid excision within the first half-wave of the system short-circuit current. The electromagnetic repulsion mechanism used in it has a faster opening and closing speed than conventional circuit breakers. Therefore, it requires a more reliable and better-performing buffer mechanism. However, during the use of existing buffer devices, the wear between components is serious, and jamming is likely to occur, resulting in poor buffering effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a buffer device for a fast switch, which solves the problems of poor buffering performance and poor reliability of existing buffer devices.

[0004] The technical solution adopted by the present invention is that a buffer device for a fast switch includes a support flange. On one side of the support flange, relatively arranged holding brackets are fixedly connected. At the ends of the two holding brackets away from the support flange, rod seats are connected. At the ends of the rod seats away from the holding brackets, a disc spring sleeve is fixedly connected, and a compression spring rod is sleeved inside the disc spring sleeve.

[0005] It further includes a buffer structure, which is fixedly connected to one side of the support flange. At the end of the buffer structure away from the support flange, a cross drive shaft is fixedly connected. The opposite ends of the cross drive shaft are respectively connected to the ends of the compression spring rod.

[0006] The characteristics of the present invention also lie in:

[0007] The buffer structure includes an oil buffer. One end of the oil buffer is fixedly connected to one side of the support flange, and the piston rod of the oil buffer is connected to the cross drive shaft.

[0008] The number of oil buffers is set to two. The two oil buffers are arranged relatively, and the piston rods of the two oil buffers are respectively connected to the opposite ends of the cross drive shaft.

[0009] The rod body of the compression spring rod extending into the disc spring sleeve is sleeved with a disc spring. The end of the compression spring rod away from the disc spring sleeve is connected to the short end of the cross drive shaft through a transmission pin.

[0010] A rotating pin is connected to the end of the holding bracket away from the support flange. The end of the rod seat is connected to the rotating pin and fixed by a compression nut.

[0011] A guide through hole is opened at the end of the piston rod extending into the oil buffer.

[0012] The oil buffer is filled with buffer oil and inert gas.

[0013] The beneficial effects of the present invention are:

[0014] The bistable buffer device for a quick switch of the present invention has the advantages that the connection of the bistable disc spring strut is convenient, the equipment debugging and installation are simple, the friction force during the transmission process is small, the oil buffer structure is novel, it meets the action characteristics of the quick switch, the overall structure of the integrated buffer design is simple and occupies a small space, and the friction force of the component transmission is small, greatly improving the service life of the equipment. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the bistable buffer device for a quick switch of the present invention;

[0016] Figure 2 It is a side sectional view of the bistable buffer device for a quick switch of the present invention;

[0017] Figure 3 It is a schematic diagram of the state of the oil buffer during the closing process of the bistable buffer device for a quick switch of the present invention.

[0018] In the figure: 1. Support flange, 2. Holding bracket, 3. Compression nut, 4. Strut seat, 5. Rotating pin, 6. Disc spring, 7. Disc spring sleeve, 8. Spring pressing rod, 9. Transmission pin, 10. Cross drive shaft, 11. Oil buffer, 12. Piston rod, 13. Guide through hole. Detailed Description of the Invention

[0019] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0020] The buffer device for a quick switch, as Figure 1-2 shown, includes a support flange 1. On one side of the support flange 1, relatively arranged holding brackets 2 are fixedly connected. At the ends of the two holding brackets 2 away from the support flange 1, strut seats 4 are connected. At the end of the strut seat 4 away from the holding bracket 2, a disc spring sleeve 7 is fixedly connected. A spring pressing rod 8 is sleeved inside the disc spring sleeve 7;

[0021] It further includes a buffer structure. The buffer structure is fixedly connected to one side of the support flange 1. At the end of the buffer structure away from the support flange 1, a cross drive shaft 10 is fixedly connected. The opposite ends of the cross drive shaft 10 are respectively connected to the ends of the spring pressing rod 8. The cross drive shaft 10 is connected to a driving force mechanism.

[0022] The buffer structure includes an oil buffer 11. One end of the oil buffer 11 is fixedly connected to one side of the support flange 1. The piston rod 12 of the oil buffer 11 is connected to the cross drive shaft 10.

[0023] The number of the oil buffers 11 is set to two. The two oil buffers 11 are arranged relatively. The piston rods 12 of the two oil buffers 11 are respectively connected to the opposite ends of the cross drive shaft 10.

[0024] The end of the piston rod 12 extending into the oil buffer 11 is provided with a guide through-hole 13.

[0025] The oil buffer 11 is filled with buffer oil and inert gas. When the driving force mechanism moves, it drives the cross drive shaft 10 to move. The cross drive shaft pulls the piston rod 12 to move. When the piston rod 12 moves, the buffer oil and inert gas inside the oil buffer 11 pass through the guide through-hole 13.

[0026] A disc spring 6 is sleeved on the rod body of the compression spring rod 8 extending into the disc spring sleeve 7. The end of the compression spring rod 8 away from the disc spring sleeve 7 is connected to the short end of the cross drive shaft 10 through a transmission pin 9.

[0027] The end of the holding bracket 2 away from the support flange 1 is connected with a rotating pin 5. The end of the support rod seat 4 is connected with the rotating pin 5 and fixed by a compression nut 3.

[0028] As Figure 3 shown, taking the closing operation process of the equipment as an example, the driving force mechanism drives the equipment to act. The oil buffer moves from the opening state A to the state B (A is the opening holding state, B is the intermediate state of performing the closing action). When the piston rod 12 moves, due to the internal buffer medium being inert gas, the damping intervention in the overall transmission process is small, ensuring the initial action speed of the equipment. After the equipment passes through the double-stable state, when the arc extinguishing chamber contacts are about to touch, in order to ensure that the contact closing speed in the vacuum arc extinguishing chamber is appropriate to reduce the closing bounce and extend the service life at the same time, the oil buffer device directly intervenes in the state C (C is the state when the closing action contacts are about to touch) at the end, increasing the transmission damping of the equipment. When the closing action is completed, the medium inside the buffer is squeezed to the other side of the cavity. The effect of the opening action process is the same. In the early stage of the opening action, the buffer does not intervene to ensure the opening speed, and the buffer intervenes at the end of the opening action to achieve the purpose of decelerating at the end.

[0029] The working principle of the buffer device for the fast switch of the present invention is as follows:

[0030] The cross drive shaft 10 is connected to the driving force mechanism, and the whole device is horizontally placed. When closing, the driving force mechanism drives the cross drive shaft 10 to move to the right, making the mechanism in the closing state. At this time, the two compression spring rods 8 bounce under the action of the disc spring 6, and the stroke of the compression spring rod 8 ensures that the equipment is in the limit state. When the equipment switches from closing to opening, the driving force mechanism drives the cross connection shaft to move to the left, overcoming the pressure of the disc spring 6. After the compression spring rod 8 passes through the middle, the disc spring 6 bounces to make the equipment enter the opening holding state.

[0031] The buffer device for the fast switch of the present invention has the advantages that the connection of the double-stable disc spring support rod is convenient, the equipment debugging and installation are simple, the friction in the transmission process is small, the oil buffer structure is novel, it meets the action characteristics of the fast switch, the overall structure of the integrated buffer design is simple, the occupied space is small, the friction of the parts in the transmission is small, and the service life of the equipment is greatly improved.

Claims

1. Buffer device for a quick switch, characterized in that, It includes a support flange (1), on one side of the support flange (1), there are fixedly connected holding brackets (2) arranged oppositely. At the ends of the two holding brackets (2) far from the support flange (1), there are connected rod seat supports (4). At the ends of the rod seat supports (4) far from the holding brackets (2), there is fixedly connected a disc spring sleeve (7). Inside the disc spring sleeve (7), there is sleeved a compression spring rod (8). It further includes a buffer structure. The buffer structure is fixedly connected to one side of the support flange (1). At one end of the buffer structure far from the support flange (1), there is fixedly connected a cross drive shaft (10). The opposite ends of the cross drive shaft (10) are respectively connected to the ends of the compression spring rod (8). The buffer structure includes an oil buffer (11). One end of the oil buffer (11) is fixedly connected to one side of the support flange (1). The piston rod (12) of the oil buffer (11) is connected to the cross drive shaft (10). The number of the oil buffers (11) is set to two. The two oil buffers (11) are arranged oppositely. The piston rods (12) of the two oil buffers (11) are respectively connected to the opposite ends of the cross drive shaft (10). The rod body of the compression spring rod (8) extending into the disc spring sleeve (7) is sleeved with a disc spring (6). The end of the compression spring rod (8) far from the disc spring sleeve (7) is connected to the short end of the cross drive shaft (10) through a transmission pin (9). At the end of the holding bracket (2) far from the support flange (1), there is connected a rotating pin (5). The end of the rod seat support (4) is connected to the rotating pin (5) and fixed by a compression nut (3). At the end of the piston rod (12) extending into the oil buffer (11), there is opened a guide through hole (13). The oil buffer (11) is filled with buffer oil and inert gas.

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