High-voltage large-current vacuum arc-extinguishing chamber

Abstract

The utility model belongs to the technical field of vacuum arc-extinguishing chambers, and discloses a high-voltage large-current vacuum arc-extinguishing chamber, which comprises a vacuum arc-extinguishing chamber, a vacuum arc-extinguishing chamber movable conducting rod, a supporting piece, a connecting rod, a hydraulic hollow jack and a connecting piece, the supporting piece is arranged on one side of the vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber movable conducting rod is arranged in the supporting piece and fixedly connected with the vacuum arc-extinguishing chamber, the hydraulic hollow jack is arranged between the supporting piece and the connecting piece, one end of the connecting rod penetrates through the second through hole to be fixedly connected with the vacuum arc-extinguishing chamber movable conducting rod, and the other end of the connecting rod is fixedly connected with the connecting piece. The hydraulic hollow jack overcomes the self-closing force of the vacuum arc-extinguishing chamber under the driving of a small force and moves upwards to realize opening and opening of an oil drain valve of the hydraulic hollow jack, and the vacuum arc-extinguishing chamber overcomes the resistance of the jack and is slowly closed under the action of the self-closing force, so that the problem of difficulty in manual opening of the high-voltage and large-current vacuum arc-extinguishing chamber is solved, and the manual operation of the high-voltage and large-current vacuum arc-extinguishing chamber is simplified. And contact surface deformation caused by closing impact of the high-voltage large-current vacuum arc-extinguishing chamber is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum interrupter chambers and relates to a high-voltage and high-current vacuum interrupter chamber. Background Art

[0002] Vacuum interrupters and vacuum circuit breakers are widely used in medium-voltage power distribution. Vacuum interrupters offer high insulation, strong interrupting capacity, long life, maintenance-free operation, and environmental friendliness. Conventional vacuum interrupters are medium-voltage rated, with a self-closing force typically not exceeding 300N. They utilize cam or lever mechanisms, enabling simple opening and closing operations.

[0003] Generator outlets use high-current or high-voltage vacuum interrupters with a self-closing force of 500N or more. Using existing cam or lever mechanisms, the vacuum interrupters cannot be opened or closed, and the moving parts of the vacuum interrupters are prone to deviating from the center axis during and after the opening process. If the closing process is not controlled, the self-closing force will cause the vacuum interrupter to close rapidly. The closing impact of the moving and static contacts will cause deformation of the vacuum interrupter contact surface, affecting the product's insulation, breaking, current conduction, and mechanical life. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems of the existing vacuum interrupter, such as the difficulty of manual opening due to the large self-closing force, the deviation of the moving part from the axis after opening, and the deformation of the contacts due to the impact of closing, and to provide a high-voltage and high-current vacuum interrupter.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a high voltage and high current vacuum interrupter, comprising a vacuum interrupter, a vacuum interrupter movable conductive rod, a support, a connecting rod, a hydraulic hollow jack and a connecting piece;

[0006] The support member is arranged on one side of the vacuum interrupter, the moving conductive rod of the vacuum interrupter is arranged in the support member and is fixedly connected to the vacuum interrupter, the hydraulic hollow jack is arranged at the upper end of the support member, one end of the connecting rod passes through the hydraulic hollow jack, the support member and the moving conductive rod of the vacuum interrupter from top to bottom and is fixedly connected, and the other end is fixedly connected to the connecting member.

[0007] Furthermore, a first through hole is provided on the upper end surface of the support member; a cavity is formed inside the support member, and the first through hole is communicated with the cavity; and a diameter of the first through hole is adapted to a diameter of a movable conductive rod of the vacuum interrupter.

[0008] Furthermore, a second through hole is provided in the hydraulic hollow jack; the axis of the second through hole coincides with the axis of the first through hole.

[0009] Furthermore, the hydraulic hollow jack is a convex structure.

[0010] Furthermore, threads are provided at both ends of the connecting rod, one end of the connecting rod is threadedly connected to the dynamic conductive rod of the vacuum interrupter, and the other end is threadedly connected to the connecting piece.

[0011] Furthermore, the distance between the upper end surface of the movable conductive rod of the vacuum interrupter and the lower end surface of the first through hole is greater than the opening distance of the vacuum interrupter.

[0012] Furthermore, the height of the connecting rod is greater than the sum of the heights of the supporting member, the hydraulic hollow jack, and the connecting member.

[0013] Furthermore, the support member is made of stainless steel or aluminum alloy.

[0014] Furthermore, the connecting rod is made of metal.

[0015] Furthermore, the connecting piece is made of stainless steel.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The utility model discloses a high-voltage and high-current vacuum interrupter. A hydraulic hollow jack is arranged between a support member and a connecting member. One end of a connecting rod passes through a second through hole and is fixedly connected to a moving conductive rod of the vacuum interrupter, and the other end is fixedly connected to the connecting member. When the hydraulic hollow jack is closed or opened, the moving conductive rod of the vacuum interrupter is driven to move in the same direction, thereby solving the problem that the self-closing force of the high-voltage and high-current vacuum interrupter is large and manual opening operation is difficult.

[0018] The utility model discloses a high-voltage and high-current vacuum interrupter. By adjusting the size of the hydraulic hollow jack oil valve, the closing speed of the vacuum interrupter is controlled to avoid the problem of contact deformation caused by closing impact. The device is suitable for opening and closing operations in the production process of high-voltage and high-current vacuum interrupters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a cross-sectional view of the high-voltage and high-current vacuum interrupter of the utility model.

[0021] Reference numerals:

[0022] 1- vacuum interrupter; 2- vacuum interrupter moving conductive rod; 3- support member; 31- first through hole; 4- connecting rod; 5- hydraulic hollow jack; 51- second through hole; 6- connecting member. DETAILED DESCRIPTION

[0023] In order to help those skilled in the art better understand the present invention, 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 embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0025] The present invention is described in further detail below with reference to the accompanying drawings:

[0026] The utility model provides a high-voltage and high-current vacuum interrupter, comprising a vacuum interrupter 1, a vacuum interrupter movable conductive rod 2, a support member 3, a connecting rod 4, a hydraulic hollow jack 5, and a connecting member 6. The support member 3 is arranged on one side of the vacuum interrupter 1. In this embodiment, the support member 3 is arranged at the upper end of the vacuum interrupter 1, the vacuum interrupter movable conductive rod 2 is arranged in the support member 3 and fixedly connected to the vacuum interrupter 1, and the hydraulic hollow jack 5 is arranged at the upper end of the support member 3; one end of the connecting rod 4 passes through the hydraulic hollow jack 5, the support member 3, and the vacuum interrupter movable conductive rod 2 in sequence from top to bottom, and is fixedly connected, and the other end is fixedly connected to the connecting member 6.

[0027] The hydraulic hollow jack 5 is placed at the upper end of the support 3 and the lower end of the connector 6, and the connecting rod 4 passes through the hydraulic hollow jack 5 and is connected to the movable conductive rod 2 of the arc extinguishing chamber, which solves the problem that the high-voltage and high-current vacuum arc extinguishing chamber has a large self-closing force and is difficult to operate manually. At the same time, the oil valve size of the hydraulic hollow jack 5 is adjusted to control the closing speed of the vacuum arc extinguishing chamber 1, avoiding the problem of contact closing impact and deformation, and is suitable for the opening and closing operations in the production process of high-voltage and high-current vacuum arc extinguishing chambers.

[0028] like Figure 1 As shown, the vacuum interrupter movable conductive rod 2 is disposed at the upper end of the vacuum interrupter 1 and is fixedly connected to the vacuum interrupter 1. When the movable portion of the vacuum interrupter 1 moves upward or downward, the movable conductive rod 2 follows the vacuum interrupter 1 in the same direction. A support member 3 is disposed on one side of the vacuum interrupter 1 and in the same direction as the movable conductive rod 2. The support member 3 has a hollow structure, and the movable conductive rod 2 is disposed within the cavity. The axis of the support member 3 coincides with the axis of the movable conductive rod 2. A first through-hole 31 is provided on the upper surface of the support member 3. The structural dimensions of the first through-hole 31 are compatible with the movable conductive rod 2 of the vacuum interrupter. Specifically, the diameter of the first through-hole 31 is greater than or equal to the diameter of the movable conductive rod 2 of the vacuum interrupter, ensuring that the movable conductive rod 2 of the vacuum interrupter can move up and down within the first through-hole 31. In addition, the support member 3 is made of stainless steel or aluminum alloy, which has strong corrosion resistance and can maintain its surface integrity and appearance in humid and corrosive environments. Finally, the distance between the movable conductive rod 2 of the vacuum interrupter and the lower end surface of the first through hole 31 is greater than the required opening distance of the vacuum interrupter 1, thereby preventing the upper end surface of the movable conductive rod 2 of the vacuum interrupter from pressing against the support member 3 and failing to open the circuit.

[0029] The hydraulic hollow jack 5 is disposed at the upper end of the support member 3. The hydraulic hollow jack 5 is a convex structure, with the large end facing downward and connected to the support member 3, and the small end facing upward and connected to the connecting member 6. At the same time, a second through hole 51 is provided in the hydraulic hollow jack 5. The second through hole 51 is interconnected with the first through hole 31, and the axis of the second through hole 51 coincides with the axis of the first through hole 31. The size of the second through hole 51 matches that of the connecting rod 4.

[0030] The hydraulic hollow jack 5 enables the opening and closing of the vacuum interrupter 1. When not in operation, the oil in the cylinder and oil chamber inside the hydraulic hollow jack 5 is static, and all components, such as the small piston, large piston, check valve, and oil valve, are in their initial positions. Opening: When the operator lifts the handle, the small piston moves upward, increasing the volume of the oil chamber below the small piston and creating a partial vacuum. At this point, the oil suction valve opens, and oil is drawn from the oil tank into the oil chamber below the small piston through the oil suction pipe. When the operator depresses the handle, the small piston moves downward, compressing the oil in the chamber below the small piston, increasing its pressure and simultaneously overcoming the self-closing force of the vacuum interrupter 1, causing it to move upward, thus opening the circuit. Closing: By opening the oil return valve or shut-off valve, the high-pressure oil in the cylinder's lower chamber flows back to the tank. Under the self-closing force, the vacuum interrupter 1 overcomes the resistance of the jack and slowly closes. The closing speed is adjusted by adjusting the size of the oil drain valve.

[0031] The connecting rod 4 is made of metal, such as stainless steel, and has external threads at both ends. One end passes through the hydraulic hollow jack 5 and the support member 3 from top to bottom and is threadedly connected to the vacuum interrupter's dynamic conductive rod 2. The external threads at the other end are threadedly connected to the connecting member 6. In this embodiment, the connecting member 6 is a locking nut made of stainless steel, with an outer surface processed into a shape that increases tightening friction, such as milled edges, hexagonal shapes, or knurling. The height of the locking nut of the connecting member 6 is between 10 and 60 mm. The connecting member 6 can compress the hydraulic hollow jack 5.

[0032] The height of the connecting rod 4 is greater than the sum of the heights of the support member 3, the hydraulic hollow jack 5, and the connecting member 6, and is at least 20 mm greater than the sum of the heights of the support member 3, the hydraulic hollow jack 5, and the connecting member 6.

[0033] The utility model discloses a high-voltage and high-current vacuum interrupter. A hydraulic hollow jack is arranged between a support member and a connecting member. One end of a connecting rod passes through a second through hole and is fixedly connected to a moving conductive rod of the vacuum interrupter, and the other end is fixedly connected to the connecting member. When the hydraulic hollow jack is closed or opened, the moving conductive rod of the vacuum interrupter is driven to move in the same direction, thereby solving the problem that the self-closing force of the high-voltage and high-current vacuum interrupter is large and manual opening operation is difficult.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A high voltage and high current vacuum interrupter, characterized by: It comprises a vacuum interrupter (1), a vacuum interrupter movable conductive rod (2), a support member (3), a connecting rod (4), a hydraulic hollow jack (5) and a connecting member (6); The support member (3) is arranged on one side of the vacuum interrupter (1); the vacuum interrupter movable conductive rod (2) is arranged in the support member (3) and is fixedly connected to the vacuum interrupter (1); the hydraulic hollow jack (5) is arranged at the upper end of the support member (3); one end of the connecting rod (4) passes through the hydraulic hollow jack (5), the support member (3) and the vacuum interrupter movable conductive rod (2) in sequence from top to bottom and is fixedly connected; the other end is fixedly connected to the connecting member (6).

2. The high voltage and high current vacuum interrupter according to claim 1, characterized in that: The upper end surface of the support member (3) is provided with a first through hole (31); The support member (3) has a cavity inside, and the first through hole (31) is in communication with the cavity; The diameter of the first through hole (31) is adapted to the diameter of the vacuum interrupter movable conductive rod (2).

3. The high voltage and high current vacuum interrupter according to claim 1, characterized in that: A second through hole (51) is provided in the hydraulic hollow jack (5); The axis of the second through hole (51) coincides with the axis of the first through hole (31).

4. The high voltage and high current vacuum interrupter according to claim 3, characterized in that: The hydraulic hollow jack (5) is a convex structure.

5. The high voltage and high current vacuum interrupter according to claim 4, characterized in that: Both ends of the connecting rod (4) are provided with threads, one end of which is threadedly connected to the vacuum interrupter movable conductive rod (2), and the other end of which is threadedly connected to the connecting piece (6).

6. The high voltage and high current vacuum interrupter according to claim 2, characterized in that: The distance between the upper end surface of the vacuum interrupter movable conductive rod (2) and the lower end surface of the first through hole (31) is greater than the opening distance of the vacuum interrupter (1).

7. The high voltage and high current vacuum interrupter according to claim 5, characterized in that: The height of the connecting rod (4) is greater than the sum of the heights of the support member (3), the hydraulic hollow jack (5), and the connecting member (6).

8. The high voltage and high current vacuum interrupter according to claim 7, characterized in that: The support member (3) is made of stainless steel or aluminum alloy.

9. The high voltage and high current vacuum interrupter according to claim 8, characterized in that: The connecting rod (4) is made of metal.

10. The high voltage and high current vacuum interrupter according to claim 9, characterized in that: The connecting piece (6) is made of stainless steel.

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