A connecting tool for vacuum interrupter aging and testing

Abstract

The utility model belongs to vacuum arc-extinguishing chamber technical field discloses a kind of connecting tool for vacuum arc-extinguishing chamber aging and testing, including clamp, the fastener is arranged in the lower end of clamp, the clamp is used for being connected with vacuum arc-extinguishing chamber by support, the fastener is fixedly connected with vacuum arc-extinguishing chamber, fastener is detachably connected with vacuum arc-extinguishing chamber, the height of connecting tool is adjusted by support, the overall structure of vacuum arc-extinguishing chamber is more compact after being connected, the lower end of clamp is also provided with connecting piece, the connecting piece is arranged outside fastener, connecting piece and fastener are fixedly connected with clamp, fastener is inner recessed screw rod, solve the problem that the overall structure is too high due to head protruding of traditional outer convex screw rod, greatly reduce the demand to axial installation space, a plurality of lightening holes are set on connecting piece, on the one hand, reduce material consumption, reduce manufacturing cost, on the other hand, play the role of auxiliary cooling, prevent overheating.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum interrupter technology, and relates to a connection tooling for aging and testing of vacuum interrupters. Background Technology

[0002] As a core component of high-voltage switchgear such as vacuum circuit breakers and vacuum load switches, the vacuum interrupter directly affects the reliability and stability of the power system. During the manufacturing and testing of the vacuum interrupter, to ensure the withstand voltage performance, breaking capacity, and vacuum sealing of the contact system, the contacts must be separated multiple times to complete key processes such as power frequency aging, impact aging, capacitor aging, and vacuum degree testing. By simulating arc erosion, voltage impact, and vacuum environments in actual operation, micro-protrusions on the contact surface can be effectively eliminated, internal material stress can be released, and vacuum sealing can be verified. This is a core step in ensuring the quality of the vacuum interrupter.

[0003] A fixture for separating the contacts is supported at one end of the vacuum interrupter and connected to a movable conductive rod that can move axially. The movable conductive rod is connected to the contacts, and contact separation is achieved by driving the axial movement of the movable conductive rod. However, traditional fixtures often use an "external screw type" structure as the drive and transmission unit for the movable conductive rod—by rotating the external screw, the helical motion of the threaded pair is converted into the axial displacement of the movable conductive rod, thereby achieving contact separation. Existing external screw type fixtures are generally tall after installation, making it difficult to complete the corresponding operation when environmental space is limited. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a connection tooling for aging and testing of vacuum interrupters.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a connection fixture for aging and testing of a vacuum interrupter, including a clamp, a fastener at the lower end of the clamp, the clamp being connected to the vacuum interrupter via a support member, and the fastener being fixedly connected to the vacuum interrupter.

[0006] Furthermore, a connector is provided at the lower end of the clamp, the connector is located on the outside of the fastener, and both the connector and the fastener are fixedly connected to the clamp.

[0007] Furthermore, the connector is provided with several weight-reducing holes.

[0008] Furthermore, the ends of the fasteners and connectors are chamfered.

[0009] Furthermore, the inner surface of the support member abuts against the outer surface of the connector.

[0010] Furthermore, the height of the fastener is less than or equal to the height of the connector.

[0011] Furthermore, the support member is a support cylinder.

[0012] Furthermore, the fastener is a concave screw.

[0013] Furthermore, the connecting element is a clamp wall.

[0014] Furthermore, the weight-reducing hole is elliptical.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model discloses a connecting fixture for aging and testing of vacuum interrupters. The fasteners are detachably connected to the vacuum interrupter, and the height of the connecting fixture is adjustable by the support. The overall structure of the vacuum interrupter is more compact after connection, solving the technical problem of the overall height of the existing external screw clamp after installation.

[0016] This utility model discloses a connecting fixture for aging and testing of vacuum interrupters. The connecting parts are provided with several elliptical weight-reducing holes, which not only saves material consumption and reduces manufacturing costs, but also facilitates the handling and operation of the fixture and improves testing efficiency. During the aging test, the heat can be dissipated into the environment more quickly through convection and radiation, which plays an auxiliary role in cooling and preventing overheating.

[0017] This utility model discloses a connecting fixture for aging and testing of vacuum interrupters. The ends of the fasteners and connectors are chamfered to prevent scratches and abrasions caused by forced insertion of the connectors and supports, as well as the fasteners and vacuum interrupters. It also automatically compensates for minor axial deviations.

[0018] This utility model discloses a connecting fixture for aging and testing of vacuum interrupters. The fastener is an internally recessed screw, which solves the problem of excessive overall structure caused by the protruding head of the traditional externally recessed screw, and greatly reduces the requirement for axial installation space. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a connection fixture for aging and testing of a vacuum interrupter according to the present invention. Figure 2 This is a cross-sectional view of the connection tooling for aging and testing of a vacuum interrupter according to this utility model, which is connected to the vacuum interrupter.

[0020] Figure label: 1-Clamp; 2-Fastener; 3-Support; 4-Vacuum interrupter; 5-Connector; 6-Weight reduction hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] Example 1 This utility model discloses a connecting fixture for aging and testing of a vacuum interrupter, comprising a clamp 1, a fastener 2 at the lower end of the clamp 1, and a support member 3 for connecting the clamp 1 to the vacuum interrupter 4. The fastener 2 is fixedly connected to the vacuum interrupter 4. A connector 5 is also provided at the lower end of the clamp 1, positioned outside the fastener 2, and both the connector 5 and the fastener 2 are fixedly connected to the clamp 1. The connector 5 has several weight-reducing holes 6.

[0023] The lower center of the clamp 1 is provided with a fastener 2 that plays a major connecting role. The fastener 2 is directly fixed to the corresponding interface on the vacuum interrupter 4, such as a threaded hole or flange, which is a threaded connection, thereby fixing the foundation of the clamp 1 to the vacuum interrupter 4.

[0024] A connector 5 is also provided at the lower end of the clamp 1. In this embodiment, the connector 5 is the clamp wall. The connector 5 is located on the outside of the fastener 2. The connector 5 and the fastener 2 are independent of each other, but are both fixedly connected to the clamp 1 to form a whole. It should be noted that the clamp 1, fastener 2, and connector can be an integral structure. The support 3 is used to connect the clamp 1 and the vacuum interrupter 4. The lower end of the support 3 is connected to the outer shell or mounting base of the vacuum interrupter 4, the upper end abuts against the lower end face of the clamp 1, and the inner surface abuts against the outer surface of the connector 5 to achieve support and positioning. In summary, the force borne by the clamp 1 can be effectively transferred and distributed to the support cylinder 3 through the connector 5, and then transferred to the vacuum interrupter 4, avoiding the stress being concentrated on the fastener 2.

[0025] Fixture 1 is the base of the entire connecting fixture, and its specific dimensions can be adjusted according to the actual situation. It can be a clamp for holding the conductive rod, a platform for mounting the sensor, or a mounting plate for connecting other external mechanisms. It is usually made of high-strength alloy steel, stainless steel, or forged aluminum alloy, etc.

[0026] Fastener 2 is the core component responsible for the main connection and locking functions. In this embodiment, a recessed screw is preferred. "Recessed" means that the head of the screw may be designed with countersunk head, internal hexagon, internal Torx, or internal hexagon with a post, etc. This allows the head of the screw to be recessed into the interior of the clamp 1, forming a flat or low end face, avoiding interference with other components during assembly or operation, and ensuring the compactness of the structure. This solves the problem of excessive overall height caused by the protruding head of traditional external screws, greatly reducing the requirement for axial installation space.

[0027] The threaded end of the concave screw is screwed into the specially designed threaded mounting hole at the top of the vacuum interrupter 4. The clamp 1 is then fixed to the vacuum interrupter 4. This is the first step in ensuring the rigidity and reliability of the connection.

[0028] Fastener 2 can be made of high-strength alloy steel such as 40Cr, 35CrMo or stainless steel such as 304, 316, and undergo quenching and tempering heat treatment to ensure that it has sufficient tensile strength and shear resistance.

[0029] In this embodiment, the support member 3 is a support cylinder. The support member 3 is sleeved on the outside of the connector 5. When the clamp 1 is subjected to lateral force, vibration or torque, the force will be transmitted to the inner wall of the support member 3 through the connector 5. The support cylinder bears most of the bending stress and shear stress, which reduces the burden on the central fastener 2 and prevents it from loosening or fatigue fracture due to long-term exposure to alternating stress.

[0030] The contact between the support cylinder 3 and the connector 5 ensures that the clamp 1 can be accurately positioned and guided, guaranteeing concentricity with the vacuum interrupter 4 and preventing misalignment during installation.

[0031] In this embodiment, the connector 5 is a clamp wall, a cylindrical or annular structure extending downward from the clamp 1. The connector 5 surrounds the outside of the fastener 2 and is integrally formed with the clamp 1 or fixedly connected as a whole by welding, bolts, or other methods. This increases the contact area between the clamp 1 and the support cylinder 3. The connector 5 transfers the load from the clamp 1 to the support 3.

[0032] The connector 5 is provided with several elliptical weight-reducing holes 6, which can reduce the weight of the connector 5 and the amount of material used. The weight-reducing holes 6 are evenly arranged in the circumferential direction, and the interval or included angle between two adjacent weight-reducing holes 6 is the same. In addition, the weight-reducing holes 6 are elliptical. Under the same weight-reducing area, the stress concentration coefficient of elliptical holes in the long axis direction is generally lower than that of circular holes, which has better fatigue resistance; it can also more smoothly disperse the stress around the hole, reducing structural weaknesses. Finally, it increases the heat dissipation surface area, which is beneficial for the dissipation of heat generated during power-on operation. It should be noted that in this embodiment, the weight-reducing holes 6 are elliptical, but they can also be replaced with other shapes.

[0033] The fastener 2 and the connector 5 have chamfered ends. When the connector 5 is inserted into the support 3, the chamfered ends act as a guide. Even if there is a slight misalignment, it can easily slide into the mating position, simplifying the assembly process and avoiding scratches or damage to the parts caused by forced insertion.

[0034] In summary, a connection fixture for aging and testing vacuum interrupters mainly includes a clamp 1, a fastener 2, and a connector 5. The clamp 1 serves as the mounting base for the entire fixture, used to clamp or install various accessories required for testing, such as conductive rod clamps, sensor platforms, or external mechanism interfaces. The fastener 2 is located at the lower center of the clamp 1 and is fixed to the threaded hole or flange at the top of the vacuum interrupter 4 via a threaded connection, undertaking the main connection and locking functions. The connector 5 is located on the outside of the fastener 2 and is fixedly connected to the clamp 1, forming an integral structure. The support 3 is sleeved on the outside of the connector 5, with its lower end connected to the outer shell or mounting base of the vacuum interrupter 4, its upper end abutting against the lower end face of the clamp 1, and its inner surface abutting against the outer surface of the connector 5, thereby achieving support and positioning. This reduces the overall height of the connection fixture for aging and testing vacuum interrupters, and also reduces the height of the vacuum interrupter after the clamp is installed.

[0035] This utility model discloses a method for using a connection fixture for aging and testing of a vacuum interrupter: The support component 3 is coaxially assembled to the outside of the stationary end of the vacuum interrupter 4, ensuring that the lower end face of the support component 3 is axially fitted with the upper end face of the vacuum interrupter 4 shell. The entire assembly consisting of the clamp 1, fastener 2, and connector 5 is hoisted above the support component 3, so that the external thread section of the fastener 2 is initially aligned with the internal thread hole of the moving conductive rod of the vacuum interrupter 4. At the same time, the outer cylindrical surface of the connector 5 forms a radial clearance fit with the inner cylindrical surface of the support component 3. A special tool, such as a torque wrench, is used to rotate the drive part on the upper part of the clamp 1, driving the fastener 2 to rotate synchronously, so that the external thread section of the fastener 2 is gradually screwed into the internal thread hole of the moving conductive rod of the vacuum interrupter 4 until the lower end face of the clamp 1 is completely fitted with the upper end face of the connector 5. Through the axial dimension design of the support component 3, the thread connection depth between the fastener 2 and the vacuum interrupter 4 is limited, thereby precisely controlling the axial displacement of the moving conductive rod and ensuring that the contact separation distance meets the requirements of the aging and testing process.

[0036] In summary, the support 3 is placed on the upper end of the vacuum interrupter 4. The clamp 1, fastener 2, and connector 5 are a whole and placed on the upper end of the support 3. During placement, the outer surface of the connector 5 abuts against the inner surface of the support 3, the lower end face of the clamp 1 abuts against the upper end face of the connector 5, and the fastener 2 is threadedly connected to the vacuum interrupter 4. The clamp 1 is rotated using a tool, and the height of the threaded connection between the fastener 2 and the vacuum interrupter 4 is determined by the support 3.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A connecting fixture for aging and testing of a vacuum interrupter, characterized in that: Includes a clamp (1), the lower end of which is provided with a fastener (2), the clamp (1) is connected to the vacuum interrupter (4) via a support member (3), and the fastener (2) is fixedly connected to the vacuum interrupter (4).

2. The connecting fixture for aging and testing of a vacuum interrupter according to claim 1, characterized in that: The lower end of the clamp (1) is also provided with a connector (5), which is located on the outside of the fastener (2). Both the connector (5) and the fastener (2) are fixedly connected to the clamp (1).

3. The connecting fixture for aging and testing of a vacuum interrupter according to claim 2, characterized in that: The connector (5) is provided with several weight-reducing holes (6).

4. The connecting fixture for aging and testing of a vacuum interrupter according to claim 2, characterized in that: The ends of the fastener (2) and connector (5) are chamfered.

5. The connecting fixture for aging and testing of a vacuum interrupter according to claim 4, characterized in that: The inner surface of the support member (3) abuts against the outer surface of the connector (5).

6. The connecting fixture for aging and testing of a vacuum interrupter according to claim 5, characterized in that: The height of the fastener (2) is less than or equal to the height of the connector (5).

7. The connecting fixture for aging and testing of a vacuum interrupter according to claim 6, characterized in that: The support member (3) is a support cylinder.

8. The connecting fixture for aging and testing of a vacuum interrupter according to claim 1, characterized in that: The fastener (2) is a concave screw.

9. The connecting fixture for aging and testing of a vacuum interrupter according to claim 2, characterized in that: The connector (5) is a clamp wall.

10. The connecting fixture for aging and testing of a vacuum interrupter according to claim 3, characterized in that: The weight reduction hole (6) is elliptical.

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