A detachable arc extinguishing chamber with anti-conducting rod twisting device

Abstract

The application relates to a detachable arc-extinguishing chamber with anti-conducting rod torsion devices, which comprises an arc-extinguishing chamber body and two anti-torsion mechanisms, the two anti-torsion mechanisms being fixedly connected with two ends of the arc-extinguishing chamber body respectively; the anti-torsion mechanism comprises a movable clamp, a fixed clamp and a fixed plate, the fixed plate and the fixed clamp being welded and fixed, a supporting rod of the arc-extinguishing chamber body being provided with a thread, the fixed plate and the supporting rod of the arc-extinguishing chamber body being fixedly connected through a nut, the movable clamp and the fixed clamp being fixedly connected through a bolt and a nut, and the movable clamp and the fixed clamp being sleeved outside a conducting rod of the arc-extinguishing chamber body. The application improves the safety of a bellows of the detachable arc-extinguishing chamber when a torque is exerted on the conducting rod, and belongs to the technical field of vacuum arc-extinguishing chambers.

Description

Technical Field

[0001] This invention relates to the field of vacuum interrupter technology, and more specifically to a detachable interrupter equipped with a device to prevent the conductor rod from twisting. Background Technology

[0002] Vacuum circuit breakers are widely used in power grids because both the arc-extinguishing medium and the insulating medium in the contact gap after arc extinguishing are in high vacuum. They offer advantages such as small size, light weight, suitability for frequent operation, and maintenance-free arc extinguishing. Studying the characteristics of vacuum arcs is crucial for circuit breaker research, and detachable arc-extinguishing chambers are the main devices used in this study.

[0003] In a detachable arc-extinguishing chamber, the bellows must allow contact movement without compromising the chamber's seal, a crucial condition for maintaining a vacuum environment. However, in existing experiments with detachable arc-extinguishing chambers, frequent contact replacements can easily introduce torsional torque onto the conductive rod. Since the conductive rod is directly connected to the bellows in the detachable chamber, this torque can damage the bellows. Therefore, ensuring bellows protection in detachable arc-extinguishing chambers and mitigating the damage caused by the conductive rod's torsional torque is of paramount importance. Summary of the Invention

[0004] To address the technical problems existing in the prior art, the purpose of this invention is to provide a detachable arc-extinguishing chamber with an anti-torsion device for the conductive rod, which improves the safety of the bellows when torque is applied to the conductive rod.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A detachable arc-extinguishing chamber equipped with an anti-torsion device for the conductive rod includes an arc-extinguishing chamber body and two anti-torsion mechanisms. The two anti-torsion mechanisms are fixedly connected to both ends of the arc-extinguishing chamber body, respectively. Each anti-torsion mechanism includes a movable clamp, a fixed clamp, and a fixed plate. The fixed plate and the fixed clamp are welded together. The support rod of the arc-extinguishing chamber body is threaded. The fixed plate and the support rod of the arc-extinguishing chamber body are connected and fixed by nuts. The movable clamp and the fixed clamp are connected and fixed by bolts and nuts. Both the movable clamp and the fixed clamp are fitted around the conductive rod of the arc-extinguishing chamber body.

[0007] As a preferred embodiment, the arc-extinguishing chamber body includes a vacuum chamber, conductive rods, bellows, ceramic shells, end caps, support rods, and support plates. There are two conductive rods, two bellows, two ceramic shells, two end caps, and two support plates. Two sets of support rods are connected to the two sets of support rods via nuts. The two sets of support rods are parallel to each other, and the two support plates are also parallel to each other, with the support rods and support plates perpendicular to each other. The fixing plates of the two anti-torsion mechanisms are respectively attached to the two support plates. Both support plates have through holes, and one end of each of the two conductive rods passes through these through holes and is positioned opposite each other. Two end caps are respectively fitted onto the outside of the two conductive rods, two bellows are respectively fitted onto the outside of the two conductive rods, and two ceramic shells are respectively fitted onto the outside of the two conductive rods. One end of each ceramic shell is fixed to one of the two end caps. The bellows are located between the ceramic shell and the conductive rod, and the end caps are located between the ceramic shell and the support plate. Both ends of the vacuum chamber are threadedly connected to the two sets of support rods. The vacuum chamber is located between the two ceramic shells, and one end of each of the two conductive rods extends into the vacuum chamber.

[0008] As a preferred embodiment, the arc-extinguishing chamber body also includes a support frame, the top of which has a circular hole, and an insulating pad is fixedly connected around the circular hole. One end of the vacuum chamber is fixedly connected to the insulating pad. One end of a ceramic shell passes through the circular hole and fits against one end of the vacuum chamber. A conductive rod passes through the circular hole and extends into the vacuum chamber.

[0009] As a preferred embodiment, the support includes a connecting rod and a connecting plate. A circular hole is located at the center of the connecting plate. One side plane of the connecting plate is fixedly connected to an insulating pad, which is located between the vacuum cavity and the connecting plate. The other side plane of the connecting plate is fixedly connected to the connecting rod. The connecting rod and two sets of support rods are arranged in parallel. The connecting rod extends for a length, and the support rods facing the same direction as the connecting rod extend for a length of b, where a > b.

[0010] As a preferred option, the ceramic shell is fixed to one end of the vacuum chamber via a flange.

[0011] As a preferred option, the end cap is fixed to the outside of the ceramic shell by a flange.

[0012] As a preferred option, the movable hoop, the fixed hoop, and the fixed plate are all made of metal materials.

[0013] As a preferred embodiment, the fixing plates of the two anti-torsion mechanisms are an upper fixing plate and a lower fixing plate, with the upper fixing plate located on the outside of one support plate and the lower fixing plate located on the inside of the other support plate.

[0014] As a preferred option, both the upper and lower fixing plates are rectangular flat plate structures.

[0015] As a preferred embodiment, a first thin washer is provided between the movable clamp and the conductive rod, and a second thin washer is provided between the fixed clamp and the conductive rod.

[0016] In summary, the present invention has the following advantages:

[0017] (1) The detachable arc-extinguishing chamber of the present invention can effectively protect the bellows from damage under the torque of the conductive rod during experimental research.

[0018] (2) The fixing plate, the movable hoop and the fixed hoop of the present invention are all made of metal materials, with high mechanical strength and good wear resistance and corrosion resistance.

[0019] (3) The groove structure on the fixing plate of the present invention facilitates its fixing to the support rod, and can be disassembled after the torsional torque is applied. Attached Figure Description

[0020] Figure 1 A schematic diagram of a detachable arc-extinguishing chamber equipped with a device to prevent the conductor rod from twisting.

[0021] Figure 2 Top view of the anti-torsion mechanism;

[0022] Among them: 1-Detachable arc-extinguishing chamber, 2-Lower anti-torsion mechanism, 3-Upper anti-torsion mechanism, 4-Vacuum cavity, 5-Conductive rod, 6-Bellwall, 7-Ceramic shell, 8-End cap, 9-Support rod, 10-Support plate, 11-Nut, 12-Bracket, 13-Insulating pad, 21-Anti-torsion fixing hoop, 22-Fixing plate, 211-Lively hoop, 212-Fixing hoop, 221-Groove. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to specific embodiments.

[0024] like Figure 1 and Figure 2 As shown, a detachable arc-extinguishing chamber equipped with an anti-torsion rod twisting device includes an arc-extinguishing chamber body and two anti-torsion mechanisms, which are respectively fixedly connected to both ends of the arc-extinguishing chamber body. Each anti-torsion mechanism includes a movable clamp, a fixed clamp, and a fixed plate. The fixed plate and the fixed clamp are welded together. The support rod of the arc-extinguishing chamber body is threaded. The fixed plate and the support rod of the arc-extinguishing chamber body are connected and fixed by nuts. The movable clamp and the fixed clamp are connected and fixed by bolts and nuts. Both the movable clamp and the fixed clamp are fitted onto the outside of the conductive rod of the arc-extinguishing chamber body. In this embodiment, for ease of identification, the two anti-torsion mechanisms are respectively named the upper anti-torsion mechanism and the lower anti-torsion mechanism. Figure 1 As shown.

[0025] The arc-extinguishing chamber body includes a vacuum chamber, conductive rods, bellows, ceramic shells, end caps, support rods, and support plates. There are two conductive rods, two bellows, two ceramic shells, two end caps, and two support plates. Two sets of support rods are connected to the two sets of support rods via nuts. The two sets of support rods are parallel to each other, and the two support plates are also parallel to each other, with the support rods and support plates perpendicular to each other. The fixing plates of the two anti-torsion mechanisms are respectively attached to the two support plates. Both support plates have through holes, through which one end of each conductive rod passes and is positioned opposite to the other. Two end caps are fitted onto the outside of each conductive rod, two bellows are fitted onto the outside of each conductive rod, and two ceramic shells are fitted onto the outside of each conductive rod. One end of each ceramic shell is fixed to one of the two end caps. The bellows are located between the ceramic shell and the conductive rod, and the end caps are located between the ceramic shell and the support plate. Both ends of the vacuum chamber are threadedly connected to the two sets of support rods. The vacuum chamber is located between the two ceramic shells, and one end of each conductive rod extends into the vacuum chamber. In this embodiment, each set of support rods includes two support rods, each with threads. One end of each support rod is connected to both ends of a support plate via nuts, with the nuts connected to the threads on the support rods. The other end of each support rod is threaded to one end of a vacuum chamber. In this embodiment, as shown... Figure 1 As shown, the conductive rod, bellows, ceramic shell, end cap, support plate and anti-torsion mechanism can be regarded as a whole component. Then, there are two of each of the following components: conductive rod, bellows, ceramic shell, end cap, support plate and anti-torsion mechanism. That is, there are two whole components, which are symmetrically arranged along the vacuum cavity.

[0026] The arc-extinguishing chamber also includes a support frame with a round hole at the top. An insulating pad is fixedly connected around the round hole, and one end of the vacuum chamber is fixedly connected to the insulating pad. One end of a ceramic shell passes through the round hole and fits into one end of the vacuum chamber. A conductive rod passes through the round hole and extends into the vacuum chamber.

[0027] The bracket includes a connecting rod and a connecting plate. A circular hole is located in the center of the connecting plate. One side plane of the connecting plate is fixedly connected to an insulating pad, which is located between the vacuum chamber and the connecting plate. The other side plane of the connecting plate is fixedly connected to the connecting rod. The connecting rod and two sets of support rods are arranged in parallel. The length of the connecting rod is a, and the length of the support rod facing the same direction as the connecting rod is b, where a > b.

[0028] The ceramic shell is fixed to one end of the vacuum chamber by a flange.

[0029] The end cap is fixed to the outside of the ceramic shell by a flange.

[0030] The movable hoop, fixed hoop, and fixed plate are all made of metal. For example... Figure 2As shown, both the movable hoop and the fixed hoop are arc structures. The two ends of the movable hoop and the two ends of the fixed hoop are connected by bolts to form an anti-torsion fixed hoop. The fixed hoop is fixed to the fixed plate by welding, so that only the movable hoop needs to be fixed during assembly.

[0031] The two anti-torsion mechanisms have an upper fixing plate and a lower fixing plate, respectively. The upper fixing plate is located on the outside of one support plate, and the lower fixing plate is located on the inside of the other support plate.

[0032] Both the upper and lower fixing plates are rectangular flat plate structures.

[0033] like Figure 2 As shown, the fixing plate has grooves at both ends that are recessed inward from the edge, so that the support rod can be directly inserted into the grooves. The fixing plate can then be installed by tightening it with nuts on the top and bottom.

[0034] A first thin washer is provided between the movable hoop and the conductive rod, and a second thin washer is provided between the fixed hoop and the conductive rod.

[0035] Usage Procedure: During the detachable arc-extinguishing chamber experiment, the contacts and conductive clamps need to be installed, followed by evacuating the vacuum chamber. Connecting the conductive rod and clamp requires twisting the threads between them, applying a torsional torque to the conductive rod. Since the conductive rod and bellows are directly connected, to prevent damage to the bellows under the torsional torque, the support plate and fixing plate are secured to the support rod with nuts. The anti-torsion mechanism's movable clamp is then secured to the fixing clamp with nuts. After applying the torsional torque and connecting the conductive rod and clamp, the fixing plate, being made of metal and conductive, is loosened after the torsional torque is applied to prevent the fixing plate and support rod from becoming conductive and electrifying the vacuum chamber. The fixing plate can then be removed, allowing for subsequent vacuum and arc-extinguishing chamber experiments. This is the complete usage method for the detachable arc-extinguishing chamber.

[0036] The detachable arc-extinguishing chamber in this embodiment utilizes two anti-torsion mechanisms, one above and one below. By installing anti-torsion mechanisms before and after the installation of the conductive rod, damage to the bellows when the conductive rod applies a torsional torque can be avoided. Compared with arc-extinguishing chambers without anti-torsion mechanisms, it has a greater advantage in reliability.

[0037] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A detachable arc-extinguishing chamber equipped with an anti-torsion device for conductive rods, characterized in that: It includes an arc-extinguishing chamber body and two anti-torsion mechanisms, which are fixedly connected to both ends of the arc-extinguishing chamber body respectively. The anti-torsion mechanism includes a movable hoop, a fixed hoop, and a fixed plate. The fixed plate and the fixed hoop are welded and fixed. The support rod of the arc-extinguishing chamber body is threaded. The fixed plate and the support rod of the arc-extinguishing chamber body are connected and fixed by nuts. The movable hoop and the fixed hoop are connected and fixed by bolts and nuts. Both the movable hoop and the fixed hoop are sleeved on the outside of the conductive rod of the arc-extinguishing chamber body. The arc-extinguishing chamber body includes a vacuum chamber, conductive rods, bellows, ceramic shells, end caps, support rods, and support plates. There are two conductive rods, two bellows, two ceramic shells, two end caps, and two support plates. Two sets of support rods are connected to the two sets of support rods via nuts. The two sets of support rods are parallel to each other, and the two support plates are also parallel to each other, with the support rods and support plates perpendicular to each other. The fixing plates of the two anti-torsion mechanisms are respectively attached to the two support plates. Both support plates have through holes, through which one end of each conductive rod passes and is positioned opposite to the other. Two end caps are fitted onto the outside of each conductive rod, two bellows are fitted onto the outside of each conductive rod, and two ceramic shells are fitted onto the outside of each conductive rod. One end of each ceramic shell is fixed to one of the two end caps. The bellows are located between the ceramic shell and the conductive rod, and the end caps are located between the ceramic shell and the support plate. Both ends of the vacuum chamber are threadedly connected to the two sets of support rods. The vacuum chamber is located between the two ceramic shells, and the other ends of both conductive rods extend into the vacuum chamber. The arc-extinguishing chamber also includes a support frame with a round hole at the top. An insulating pad is fixedly connected around the round hole. One end of the vacuum chamber is fixedly connected to the insulating pad. The other end of one ceramic shell passes through the round hole and fits into one end of the vacuum chamber, and the other end of the other ceramic shell fits into the other end of the vacuum chamber.

2. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: The bracket includes a connecting rod and a connecting plate. A circular hole is located in the center of the connecting plate. One side plane of the connecting plate is fixedly connected to an insulating pad, which is located between the vacuum chamber and the connecting plate. The other side plane of the connecting plate is fixedly connected to the connecting rod. The connecting rod and two sets of support rods are arranged in parallel. The length of the connecting rod is a, and the length of the support rod facing the same direction as the connecting rod is b, where a > b.

3. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: The ceramic shell is fixed to one end of the vacuum chamber by a flange.

4. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: The end cap is fixed to the outside of the ceramic shell by a flange.

5. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: The movable hoop, fixed hoop, and fixed plate are all made of metal.

6. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: The two anti-torsion mechanisms have an upper fixing plate and a lower fixing plate, respectively. The upper fixing plate is located on the outside of one support plate, and the lower fixing plate is located on the inside of the other support plate.

7. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 6, characterized in that: Both the upper and lower fixing plates are rectangular flat plate structures.

8. A detachable arc-extinguishing chamber with an anti-torsion device for conductive rods as described in claim 1, characterized in that: A first thin washer is provided between the movable hoop and the conductive rod, and a second thin washer is provided between the fixed hoop and the conductive rod.

Images