A gap-maintaining structure for a vacuum interrupter

Abstract

This invention provides a gap-maintaining structure for a vacuum interrupter, belonging to the field of vacuum interrupter testing technology, and solves the problem of the cumbersome use of pulling-opening molds in existing technologies. It includes a base with a clearance notch for placing a moving conductive rod. Limiting protrusions for inserting into annular grooves on both sides of the inner wall of the clearance notch are fixedly provided. After the moving conductive rod is pulled apart a certain distance by a pulling device, the clearance notch on the base is aligned with the moving conductive rod and placed, so that the limiting protrusions are inserted into the annular grooves on the moving conductive rod. After releasing the pulling device, the base can maintain the pulled-out distance of the moving conductive rod, ensuring the quality of the vacuum interrupter and facilitating subsequent operations requiring a specific gap, thus reducing the workload of operators.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum interrupter detection technology, specifically to a vacuum interrupter opening distance maintenance structure. Background Technology

[0002] Vacuum interrupters are the core components of medium and high voltage power switches. Their core function is to use the excellent insulation of the high vacuum environment inside the tube to quickly extinguish the arc and suppress the current after the power supply is cut off, thereby avoiding accidents and unexpected events.

[0003] In the production process of vacuum interrupters, lightning impulse testing and various aging processes are performed. These processes are crucial for eliminating burrs inside the vacuum interrupter. The opening distance of the vacuum interrupter is one of the important factors affecting the lightning impulse testing and various aging processes. Current technology involves installing a guide sleeve on the moving end of the vacuum interrupter, then placing a barrel-shaped mold on top, and using a special opening die to open the vacuum interrupter using a lever principle. This process is cumbersome, requiring the removal of all molds after the lightning impulse testing and aging processes. Furthermore, the opening distance needs to be precisely controlled by the operator; if the opening distance is not met, it will affect the results of the lightning impulse testing and various aging processes, thus impacting the quality of the vacuum interrupter. Additionally, subsequent operations requiring a higher opening distance necessitate the reinstallation of the opening die, further increasing the workload of the operators. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an opening distance retention structure for a vacuum interrupter. After the moving conductive rod is pulled apart by a pulling device to a certain distance, the clearance notch on the base is aligned with the moving conductive rod and placed therein, so that the limiting protrusion is inserted into the annular groove on the moving conductive rod. After the pulling device is released, the base can keep the pulling distance of the moving conductive rod unchanged, ensuring the quality of the vacuum interrupter and facilitating various subsequent operations that require opening distance, thus reducing the workload of the operators.

[0005] The technical solution adopted in this utility model is as follows: A gap-maintaining structure for a vacuum interrupter includes a base, on which a clearance notch for placing a moving conductive rod is provided, and on both sides of the inner wall of the clearance notch, limiting protrusions for inserting into annular grooves on the moving conductive rod are fixedly provided.

[0006] Preferably, the sidewall of the base is provided with a boss.

[0007] Preferably, the avoidance notch and the limiting protrusion are provided with guide slopes.

[0008] Preferably, the base is fixedly connected with a limiting stop for the limiting protrusion to abut against the fixing ring after being inserted into the annular groove.

[0009] Preferably, the limiting stop is arc-shaped.

[0010] Preferably, the base, the limiting protrusion, and the limiting stop are all made of non-conductive material.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: After the moving conductive rod is pulled apart by the pulling device to a certain distance, the clearance notch on the base is aligned with the moving conductive rod and placed so that the limiting protrusion is inserted into the annular groove on the moving conductive rod. After the pulling device is released, the base can keep the pulling distance of the moving conductive rod unchanged, ensuring the quality of the vacuum interrupter and facilitating various subsequent operations that require opening distance, thus reducing the workload of the operators. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of an embodiment of the present utility model; Figure 3 A schematic diagram of the usage state provided for an embodiment of this utility model; Figure 4 This is a schematic diagram showing another perspective of the usage state provided for an embodiment of this utility model.

[0014] Reference numerals in the attached drawings: 100-moving conductive rod; 200-annular groove; 300-moving end sealing ring; 400-fixed ring; 1-base; 2-avoidance notch; 3-limiting protrusion; 4-guide slope; 5-bore; 6-limiting stop. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] The following is combined Figures 1-4 This utility model will be described in detail.

[0019] Example A gap-holding structure for a vacuum interrupter includes a base 1. The base 1 has a clearance notch 2 for placing a moving conductive rod 100. The inner walls of the clearance notch 2 are fixedly provided with limiting protrusions 3 for inserting into annular grooves 200 on the moving conductive rod 100.

[0020] The vacuum interrupter includes a cylindrical shell, a moving end sealing ring 300 is fixedly installed on one end face of the cylindrical shell, a moving conductive rod 100 is movably installed through the moving end sealing ring 300, an annular groove 200 is provided on the moving conductive rod 100, and a coaxial fixing ring 400 is also provided on the moving end sealing ring 300.

[0021] After the moving conductive rod 100 is pulled apart by the pulling device to a certain distance, the clearance notch 2 on the base 1 is aligned with the moving conductive rod 100 and placed so that the limiting protrusion 3 is inserted into the annular groove 200 on the moving conductive rod 100. After the pulling device is released, the base 1 abuts against the fixing ring 400 to keep the pulling distance of the moving conductive rod 100 unchanged, ensuring the quality of the vacuum interrupter and facilitating various subsequent operations that require opening distance, thus reducing the workload of the operators.

[0022] The base 1 has a boss 5 on its side wall. The boss 5 makes it easy for the operator to hold the base 1, avoids hand contact with the moving conductive rod 100, and reduces the probability of oxidation of the moving conductive rod 100.

[0023] The clearance notch 2 and the limiting protrusion 3 are provided with guide slopes 4. The guide slopes 4 facilitate the insertion of the base 1 into the moving conductive rod 100, while preventing the sharp protrusions on the clearance notch 2 and the limiting protrusion 3 from damaging the moving conductive rod 100.

[0024] A limiting stop 6 is fixedly connected to the base 1 to limit the protrusion 3 from entering the annular groove 200 and abutting against the fixed ring 400. The limiting stop 6 keeps the base 1 coaxial with the fixed ring 400. If the base 1 and the fixed ring 400 are not coaxial, the base 1 will be misaligned with the fixed ring 400, causing the base 1 to deflect easily when subjected to the downward pressure of the moving conductive rod 100. This causes the moving conductive rod 100 to tilt. After the moving conductive rod 100 tilts, it will affect the electric field distribution in the vacuum interrupter during lightning impulse detection and aging, affecting the results of lightning impulse detection and aging. In severe cases, it may even cause breakdown, damaging and scrapping the vacuum interrupter.

[0025] The limiting stop 6 is arc-shaped. The arc shape allows it to fit better against the surface of the retaining ring 400.

[0026] The base 1, the limiting protrusion 3, and the limiting stop 6 are all made of non-conductive materials to avoid the influence of electrical conductivity on the test.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gap-maintaining structure for a vacuum interrupter, characterized in that, Includes a base (1), on which a clearance notch (2) for placing a moving conductive rod (100) is provided, and on both sides of the inner wall of the clearance notch (2) are limiting protrusions (3) for inserting into the annular groove (200) on the moving conductive rod (100).

2. The opening gap maintaining structure of a vacuum interrupter according to claim 1, characterized in that, The base (1) has a boss (5) on its side wall.

3. The opening gap maintaining structure of a vacuum interrupter according to claim 1, characterized in that, The avoidance notch (2) and the limiting protrusion (3) are provided with guide slopes (4).

4. The opening gap maintaining structure of a vacuum interrupter according to claim 1, characterized in that, The base (1) is fixedly connected to a limiting stop (6) for the limiting protrusion (3) to abut against the fixing ring (400) after being inserted into the annular groove (200).

5. The opening gap maintaining structure of a vacuum interrupter according to claim 4, characterized in that, The limiting stop (6) is arc-shaped.

6. The opening gap maintaining structure of a vacuum interrupter according to claim 4, characterized in that, The base (1), the limiting protrusion (3), and the limiting stop (6) are all made of non-conductive material.

Images