Vacuum arc-extinguishing chamber product temperature rise test tool

Abstract

The utility model belongs to the technical field of electric vacuum device detection, and discloses a vacuum arc-extinguishing chamber product temperature rise test tool, which is characterized in that an adjusting spring assembly is provided with a spring, and the first end of the spring is connected with a spring first end rod piece; the other end, back to the first end, of the spring is connected with a spring second end rod piece; the first end rod piece of the spring penetrates through the positioning plate, and a fastener is mounted on the first end rod piece of the spring; a second end rod piece of the spring is connected with a connector, and the other end of the connector is matched with an end contact of a movable conducting rod of the vacuum arc-extinguishing chamber; the positioning plate is connected with a plurality of positioning rods on the outer side of the spring first end rod piece, and the other end of each positioning rod is connected with a static end guide plate; and a mounting through hole matched with the movable conducting rod is formed in the movable end flow guide piece. According to the utility model, the positioning operation of the vacuum arc-extinguishing chamber temperature rise test can be simplified, and pressure can be applied conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of testing technology for vacuum electronic devices, specifically relating to a temperature rise testing fixture for a vacuum interrupter product. Background Technology

[0002] Temperature rise testing is a routine test item in the type testing of electrical products. The purpose of temperature rise testing is to test the temperature changes of components and the entire electrical product under normal current-carrying conditions to determine whether the electrical product or component meets the requirements of the standard and ensures the safety of the power system. With the rapid development of electrical engineering, temperature rise testing has become increasingly important for the safety of power equipment and components. Temperature rise testing is a type test item and one of the main test items for new product finalization. For derivative products or normal products, due to significant changes in product processes and substitution of raw materials for major components, temperature rise testing is required. Currently, vacuum arc-extinguishing temperature rise testing mainly uses switchgear as a carrier for whole-machine testing. The arc-extinguishing chamber needs to be sealed or installed in an insulating cylinder. Then, the sealed pole or the insulating cylinder assembly with the arc-extinguishing chamber is installed on the circuit breaker. Insulating tie rods are used to ensure contact pressure. The temperature rise test is then performed on the circuit breaker or the switchgear with the circuit breaker installed to evaluate whether the entire machine and the arc-extinguishing chamber meet the requirements. However, as a manufacturer of arc-extinguishing chambers, we are more concerned about the temperature rise of the arc-extinguishing chamber products. Although the above methods are standard and feasible, the process is long, requires many components, and has low efficiency, which affects the product development efficiency and test progress.

[0003] Chinese patent publication number CN106771925A, entitled "A Fixture for Testing the Fragment Withstand Voltage of a Medium-Pressure Vacuum Interruptor," describes a fixture comprising a high-voltage generator, an insulating base, a metal plate, a vacuum interrupter, and a fracture opener. The fracture opener consists of a sleeve, a column, a rocker arm, a screw, and a pad. The column is located on the upper outer edge of the sleeve, and its top has a hole for mounting the rocker arm. The rocker arm is connected to the column via a shaft. A through hole is located at the front end of the rocker arm, through which a lifting ring passes. The screw has threads at its lower end and a circular cover plate at its top, with a hook at the upper part of the cover plate. This patent application protects the vacuum interrupter from impact by the bellows using a limiting block, but it does not solve the problem of inconvenient pressure application during temperature rise testing. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide a temperature rise test fixture for vacuum interrupter products. The fixture uses an adjusting spring assembly to apply pressure to the contacts of the vacuum interrupter. The current is ensured by connecting the current-guiding copper busbar through the moving end guide and the stationary end guide, so as to realize the temperature rise test of the interrupter product. It is convenient for positioning operation of vacuum interrupter temperature rise test and convenient for applying pressure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A temperature rise testing fixture for a vacuum interrupter product includes: a moving end guide, an adjusting spring assembly, and a positioning plate. The adjusting spring assembly has a spring, with a first end of the spring connected to a first end rod; the other end of the spring, facing away from the first end, is connected to a second end rod; the first end rod passes through the positioning plate, and a fastener is installed on the first end rod; the second end rod is connected to a connector, the other end of which matches the end contact of the moving conductive rod of the vacuum interrupter; the positioning plate has several positioning rods connected to the outside of the first end rod, the other end of which is connected to a stationary end guide plate; the moving end guide has mounting through holes that match the moving conductive rod.

[0007] Optionally, the moving end guide includes a first block, one end of which is connected to a second block, and the mounting through hole is formed on the first block; the second block has a fastening groove communicating with the mounting through hole, the fastening groove communicating with the outside, and the fastening groove has a groove through hole along its end face direction, and a fastener is installed in the groove through hole.

[0008] Optionally, the axial direction of the mounting through hole is perpendicular to the axial direction of the groove through hole.

[0009] Optionally, both the second block and the first block are rectangular, and the thickness of the second block is the same as the thickness of the first block.

[0010] Optionally, the second block is disposed at the top center of the first block, and the mounting through hole is formed at the center of the first block.

[0011] Optionally, the moving end guide is made of oxygen-free copper.

[0012] Optionally, two fasteners are mounted on the first end member of the spring, and the positioning plate is disposed between the two fasteners.

[0013] Optionally, the positioning plate is made of an insulating material.

[0014] Optionally, the positioning rod passes through the stationary end guide plate, and a fastener is installed on the end of the rod that passes through the stationary end guide plate.

[0015] Optionally, the number of positioning rods is four, the positioning plate is a rectangular plate, and the four positioning rods are respectively set at the four corner points of the positioning plate.

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

[0017] This utility model provides a temperature rise test fixture for vacuum interrupter products. Addressing the inconvenience of existing vacuum interrupter temperature rise tests, the fixture positions the vacuum interrupter by connecting the connector on the adjusting spring assembly connected to the positioning plate, applies pressure to the vacuum interrupter by the adjusting spring assembly, and ensures current flow by setting static and dynamic end guide components and connecting a current-guiding copper busbar, thereby realizing the temperature rise test of the interrupter product.

[0018] Furthermore, by providing a through hole in the groove, this utility model facilitates the adjustment of the tightness of the moving end guide, enabling the moving end guide to be stably connected to the moving conductive rod. Attached Figure Description

[0019] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the temperature rise experimental fixture of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the moving end guide of this utility model;

[0022] Among them, 1. Locking nut; 2. First positioning nut; 3. Positioning plate; 4. Adjusting nut; 5. Adjusting spring assembly; 6. Connector; 7. Moving end guide; 71. Mounting hole; 72. Fastening groove; 701. First block; 702. Second block; 8. Vacuum interrupter; 81. Moving conductive rod; 9. Stationary end guide plate; 10. Second positioning nut; 11. Positioning rod. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0024] 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.

[0025] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used 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 in which the utility model product is usually placed during 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.

[0026] When an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. The use of the term "horizontal" does not imply that the component is required to be absolutely horizontal, but rather that it may be slightly tilted. "Horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0027] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] The present invention will now be described in detail with reference to the accompanying drawings.

[0030] like Figure 1As shown, a temperature rise test fixture for a vacuum interrupter product according to this utility model includes: a moving end guide 7, an adjusting spring assembly 5, and a positioning plate 3. The adjusting spring assembly 5 has a spring, and a first end of the spring is connected to a first end rod. The other end of the spring facing away from the first end is connected to a second end rod. The first end rod passes through the positioning plate 3, and a fastener is installed on the first end rod. The second end rod is connected to a connector 6, and the other end of the connector 6 matches the end contact of the moving conductive rod 81 of the vacuum interrupter 8. The positioning plate 3 has several positioning rods 11 connected to the outside of the first end rod, and the other end of the positioning rods 11 is connected to a stationary end guide plate 9. The moving end guide 7 has an installation through hole 71 that matches the moving conductive rod 81.

[0031] This utility model positions the vacuum interrupter 8 by means of the connector 6 on the adjusting spring assembly 5 connected to the positioning plate 3, applies pressure to the vacuum interrupter 8 by means of the adjusting spring assembly 5, and ensures current flow by means of the static end guide 9 and the dynamic end guide 7, and connects the guide copper busbar. This makes it easy to apply pressure to the temperature rise test of the vacuum interrupter 8, and realize the temperature rise test of the vacuum interrupter 8 product.

[0032] Example 1

[0033] This utility model provides a temperature rise testing fixture for vacuum interrupter products, suitable for temperature rise testing of vacuum interrupter products, such as... Figure 1 As shown.

[0034] A moving conductive rod 81 is connected to the top of the vacuum interrupter 8, and the bottom end of the vacuum interrupter 8 is the stationary end.

[0035] Optionally, the moving end guide 7 is made of oxygen-free copper.

[0036] The moving end guide 7 is provided with a mounting through hole 71 that matches the moving conductive rod 81. The moving end guide 7 is sleeved on the moving conductive rod 81 of the vacuum interrupter 8 through the mounting through hole 71.

[0037] The moving end guide 7 has a fastening groove communicating with the mounting through hole 71. The fastening groove is connected to the outside, and a groove body through hole 72 is formed along its end face. A fastener is installed in the groove body through hole 72. Optionally, the fastener is a screw or a bolt.

[0038] Specifically, the moving end guide 7 includes a first block 701, one end of which is connected to a second block 702. The mounting through hole 71 is opened in the center of the first block 701, and the groove through hole 72 is opened in the second block 702. The axial direction of the mounting through hole 71 is perpendicular to the axial direction of the groove through hole 72.

[0039] Both the second block 702 and the first block 701 are rectangular. The thickness of the second block 702 is the same as the thickness of the first block 701, and the width of the second block 702 is less than the width of the first block 701. The second block 702 is located at the top center of the first block 701. The fastening groove is formed along the top centerline of the second block 702 and extends to the mounting hole 71, communicating with the mounting hole 71.

[0040] Optionally, the moving end guide 7 has a connecting hole on its side for connecting to the equipment plate. Specifically, the connecting hole is a threaded hole. The connecting hole is located on two opposite sides of the first block 701, and the axial direction of the connecting hole is parallel to the axial direction of the through hole 72 in the groove.

[0041] The screw of the moving end guide 7 causes the groove of the moving end guide 7 to deform through the fastening force, so that the moving end guide 7 and the moving conductive rod 81 are tightly fitted to ensure the current conduction.

[0042] A connector 6 is connected to the movable conductive rod 81. One end of the connector 6 is fastened to the movable conductive rod 81, and the other end is connected to an adjusting spring assembly 5. A spring is provided inside the adjusting spring assembly 5, and rods are connected to both ends of the spring. The first end of the spring is connected to the first spring rod; the other end of the spring, facing away from the first end, is connected to the second spring rod.

[0043] The adjusting spring assembly 5 is connected to the moving conductive rod 81 via the second end member of the spring at the lower end of the spring. By adjusting the spring compression, pressure can be applied to the product contacts of the arc-extinguishing chamber to meet the product temperature rise requirements.

[0044] The stationary end guide plate 9 is fixedly connected to the stationary end of the vacuum interrupter 8. A positioning rod 11 is provided on the stationary end guide plate 9 on the outside of the vacuum interrupter 8, passing through the stationary end guide plate 9.

[0045] Specifically, the positioning rod 11 is a screw. There are four positioning rods 11, and the vacuum interrupter 8 is located in the center of the four positioning rods 11.

[0046] The positioning rod 11 is fixed by a second positioning nut at one end, which passes through the stationary end guide plate 9. The other end of the positioning rod 11 is connected to a positioning plate 3, and the positioning rod 11 passes through the positioning plate 3. The end of the positioning rod 11 that passes through the positioning plate 3 is fixed by a first positioning nut 2. An adjusting nut 4 is also provided on the positioning rod 11, and the positioning plate 3 is disposed between the adjusting nut 4 and the first positioning nut 2.

[0047] The spring first end rod of the adjusting spring assembly 5 passes through the center of the positioning plate 3 and is fixed by the locking nut 1.

[0048] Specifically, the positioning plate 3 is made of insulating material, which can prevent eddy currents from forming during the test and affecting the test data.

[0049] Example 2

[0050] This utility model discloses a temperature rise testing fixture for a vacuum interrupter product. When in use, it includes the following steps:

[0051] First, the moving end guide 7 is fixed to the moving conductive rod 81 of the vacuum interrupter 8. The moving end guide 7 is made of oxygen-free copper, and the fastener installed in the through hole 72 of the groove is a screw.

[0052] Make the moving end current guide 7 fit tightly against the moving conductive rod 81 to ensure current conduction.

[0053] Then, fasten one end of connector 6 to the moving conductive rod 81, and connect the other end to the adjusting spring assembly 5. By adjusting the spring compression, pressure is applied to the contacts of the vacuum interrupter 8 to meet the temperature rise conditions.

[0054] Then, the stationary end guide plate 9 is fastened to the stationary end of the vacuum interrupter 8, and four positioning screws 11 and the upper positioning plate 3 are connected in sequence to ensure that one end of the adjusting spring assembly 5 passes through the center hole of the upper positioning plate 3. The upper positioning plate 3 is made of insulating material to avoid the formation of eddy currents during the test that could affect the test data.

[0055] Tighten the first positioning nut 2 and the second positioning nut 10 to form the overall positioning frame of the arc-extinguishing chamber. Tighten the adjusting nut 4 and the locking nut 1 at the upper end of the adjusting spring assembly 5 to complete the overall structural assembly.

[0056] Tighten the adjusting nut 4 continuously to compress the spring inside the adjusting spring assembly 5. Determine the spring compression and contact pressure value by measuring the distance between the end face of the adjusting spring assembly 5 and the end face of the upper positioning plate 3. This completes the assembly of the arc-extinguishing room temperature rise test device, satisfying the experimental conditions for vacuum arc extinguishing room temperature rise.

[0057] Finally, according to the product test current requirements, the copper busbar of the temperature rise test equipment is connected to the connection hole of the moving end guide 7, and the copper busbar of the temperature rise test equipment is connected to the stationary end guide plate 9 by wires to form a test circuit. Finally, according to the experimental requirements, the temperature rise test thermocouple is connected to the part of the vacuum interrupter 8 that needs to be tested to complete the temperature rise test.

[0058] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A temperature rise testing fixture for a vacuum interrupter product, characterized in that, include: The moving end guide (7), the adjusting spring assembly (5), and the positioning plate (3) are provided. The adjusting spring assembly (5) has a spring, and the first end of the spring is connected to a first end rod. The other end of the spring facing away from the first end is connected to a second end rod. The first end rod passes through the positioning plate (3) and a fastener is installed on the first end rod. The second end rod is connected to a connector (6), and the other end of the connector (6) matches the end contact of the moving conductive rod (81) of the vacuum interrupter (8). The positioning plate (3) is connected to several positioning rods (11) on the outside of the first end rod. The other end of the positioning rods (11) is connected to a stationary end guide plate (9). The moving end guide (7) is provided with a mounting through hole (71) that matches the moving conductive rod (81).

2. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, The moving end guide (7) includes a first block (701), one end of which is connected to a second block (702). The mounting through hole (71) is opened on the first block (701). The second block (702) is provided with a fastening groove communicating with the mounting through hole (71). The fastening groove is connected to the outside, and the fastening groove is provided with a groove through hole (72) along its end face direction. Fasteners are installed in the groove through hole (72).

3. The temperature rise test fixture for a vacuum interrupter product according to claim 2, characterized in that, The axial direction of the mounting through hole (71) is perpendicular to the axial direction of the groove through hole (72).

4. The temperature rise test fixture for a vacuum interrupter product according to claim 2, characterized in that, The second block (702) and the first block (701) are both rectangular, and the thickness of the second block (702) is the same as the thickness of the first block (701).

5. The temperature rise test fixture for a vacuum interrupter product according to claim 2, characterized in that, The second block (702) is located at the top center of the first block (701), and the mounting through hole (71) is opened at the center of the first block (701).

6. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, The moving end guide (7) is made of oxygen-free copper.

7. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, Two fasteners are installed on the first end rod of the spring, and the positioning plate (3) is disposed between the two fasteners.

8. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, The positioning plate (3) is made of insulating material.

9. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, The positioning rod (11) passes through the stationary end guide plate (9), and a fastener is installed on the end of the rod that passes through the stationary end guide plate (9).

10. The temperature rise test fixture for a vacuum interrupter product according to claim 1, characterized in that, The number of positioning rods (11) is four, the positioning plate (3) is a rectangular plate, and the four positioning rods (11) are respectively set at the four corner points of the positioning plate (3).

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