A GIS pressure test tool
By configuring a single-phase isolation conversion switch on the GIS voltage-withdrawal test tooling, multiple products are allowed to be tested simultaneously, solving the problems of long test time and inaccurate problem judgment in the existing technology, and achieving efficient test procedures and accurate fault positioning .
Patent Information
- Application Number
- CN201710891464.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2017-09-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2037-09-27
AI Technical Summary
During the test process of the existing GIS voltage test tool, the isolation conversion switches of each phase are not assembled, so that only one product can be installed at a time for single-phase test, which increases the test time and cannot be accurately judged when multiple products are tested in parallel. The problem lies.
A GIS voltage-resistant test tooling is designed, in which the interfaces of each group of product are equipped with single-phase isolation conversion switches, allowing multiple products to be installed simultaneously, and the test time is reduced through closing and opening operations to avoid blocking, vacuuming and charging. The operation of SF6 gas ensures accurate judgment of problem products.
The simultaneous test of multiple products is achieved, which reduces the test time, and can simultaneously recover gas and remove products after the test is completed, improving the test efficiency and accuracy.
Smart Images
Figure CN107728019B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a gas insulated metal enclosed switchgear, in particular to a GIS withstand voltage test tool. Background Art
[0002] Taking 220KV gas-insulated metal-enclosed switchgear (also known as GIS) as an example, a withstand voltage test is required before leaving the factory. Since the existing withstand voltage test fixtures are not equipped with isolating transfer switches for each phase, during the product (referring to 220KV gas-insulated metal-enclosed switchgear, etc., the same below) test process, only one product can be installed on the fixture at a time for single-phase testing, and the interfaces of other products need to be closed, vacuumed, filled with SF6 gas, and other operations, which greatly increases the time required for product testing. If multiple products are installed on the fixture for testing each time, that is, multiple products are tested in parallel, then when one of the phases is tested, if a product has a problem, it is impossible to accurately determine which product the problem is with. Summary of the invention
[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a GIS pressure test fixture that can simultaneously install multiple products on one test fixture for testing, thereby reducing the test time and not affecting the judgment of problematic products.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0005] A GIS withstand voltage test tool comprises at least one group of product interfaces, and each phase of each group of product interfaces is equipped with a single-phase isolation conversion switch.
[0006] As a further improvement of the above technical solution: the single-phase isolating transfer switch includes a shell, a static contact seat, a moving contact seat, a moving contact, a transmission assembly and a driving member for driving the moving contact to reciprocate between the static contact seat and the moving contact seat, the static contact seat and the moving contact seat are respectively installed in the shell through insulating members, the transmission assembly is arranged in the shell and connected to the moving contact, and the driving member is passed through the shell and connected to the transmission assembly.
[0007] As a further improvement of the above technical solution: a movable cavity is arranged in the moving contact seat, the moving contact penetrates the moving contact seat and extends into the movable cavity, the transmission assembly includes an insulating rod, and a first connecting rod, a limit plate, a limit rod and a second connecting rod arranged in the movable cavity, one end of the insulating rod is connected to the driving member, and the other end is fixedly connected to one end of the first connecting rod, the other end of the first connecting rod is fixedly connected to one end of the limit rod, the other end of the limit rod is fixedly connected to one end of the second connecting rod, the other end of the second connecting rod is hinged to the moving contact, the limit plate is fixedly installed on the side wall of the movable cavity, an arc guide groove is arranged on the limit plate, and the limit rod extends into the arc guide groove.
[0008] As a further improvement of the above technical solution: the driving member is a driving shaft, the driving member, the insulating rod and the limiting rod are all arranged horizontally, and the moving contact, the first connecting rod and the second connecting rod are all arranged vertically.
[0009] As a further improvement of the above technical solution: the limit plate is located between the first connecting rod and the insulating rod, the limit plate is provided with a through hole at the center of the arc guide groove, the end of the insulating rod away from the driving member is provided with a mounting hole and the end provided with the mounting hole movably passes through the through hole, and the first connecting rod is interference fit with the mounting hole.
[0010] As a further improvement of the above technical solution: a connecting pin is installed at one end of the insulating rod away from the driving member, the insulating rod is key-connected to the connecting pin, the connecting pin movably passes through the through hole, the mounting hole is provided on the connecting pin, an elastic member is abutted between the end of the connecting pin and the end of the insulating rod, a limiting clamp ring with a diameter larger than the diameter of the through hole is clamped on the connecting pin, and the limiting clamp ring is tightly attached to the side of the limiting plate close to the insulating rod.
[0011] As a further improvement of the above technical solution: the central angle corresponding to the arc-shaped guide groove is 180°.
[0012] As a further improvement of the above technical solution: the insulating member is a disc insulator, and a sealing member is provided between the shell and the insulating member.
[0013] As a further improvement of the above technical solution: the moving contact seat is provided with a plurality of sealing members along the axial direction of the moving contact.
[0014] Compared with the prior art, the advantages of the present invention are as follows: the GIS withstand voltage test fixture disclosed by the present invention is equipped with a single-phase isolating transfer switch for each phase of each group of product interfaces. If only one product needs to be tested, only one phase to be tested needs to be closed, and the other two phases need to be opened and grounded at the product end. The other groups of product interfaces of the fixture are opened and directly grounded, without the need for sealing, vacuuming and filling SF6 gas. If multiple products are tested on the fixture, the multiple products are first installed on the interfaces of each group of products respectively. If the A phase of a certain product is to be tested, only the single-phase isolating transfer switch of the phase needs to be closed, and the single-phase isolating transfer switches of the B phase, the C phase of the product, and all three phases of the interfaces of the other products need to be opened, and grounded at the product end, and the withstand voltage test can be carried out. According to this method, the B phase, the C phase of a certain product, and the three phases of the subsequent products can be completed in sequence. The tooling can be used to install multiple products at the same time, and operations such as vacuuming and filling SF6 gas at the interfaces of each group of products can also be carried out simultaneously, which greatly reduces the test time and does not affect the judgment of problematic products. After the test is completed, the gas can be recovered and each product can be removed for the next process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the existing test tooling.
[0016] Figure 2 It is a structural schematic diagram of the GIS pressure resistance test tooling of the present invention.
[0017] Figure 3 It is a main structural schematic diagram of the single-phase isolating transfer switch in the present invention.
[0018] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0019] Figure 5 It is a three-dimensional structural schematic diagram of the single-phase isolating transfer switch in the present invention.
[0020] The numbers in the figure represent: 1. product interface; 2. single-phase isolating transfer switch; 21. housing; 22. static contact seat; 23. moving contact seat; 231. movable cavity; 24. moving contact; 25. transmission assembly; 251. first connecting rod; 252. limit plate; 253. limit rod; 254. second connecting rod; 255. insulating rod; 256. arc guide groove; 257. through hole; 258. mounting hole; 26. driving member; 27. insulating member; 28. connecting pin; 281. limit clamp; 29. elastic member; 3. cover plate. DETAILED DESCRIPTION
[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] Figures 2 to 4 An embodiment of the present invention is shown. The GIS withstand voltage test tooling of this embodiment includes two sets of parallel product interfaces 1. Each phase of each set of product interfaces 1 is equipped with a single-phase isolation conversion switch 2. In other embodiments, the product interfaces 1 can be set to one group, three groups or more.
[0023] In the GIS withstand voltage test fixture, each phase of each group of product interfaces 1 is equipped with a single-phase isolating transfer switch 2. If only one product needs to be tested, only one phase to be tested needs to be closed, and the other two phases need to be opened and grounded at the product end. The other groups of product interfaces 1 of the fixture are opened and directly grounded, without the need for sealing, vacuuming, and filling with SF6 gas. If multiple products are tested on the fixture, first install the multiple products on each group of product interfaces 1. If you want to test phase A of a certain product, you only need to close the single-phase isolating transfer switch 2 of that phase, open phases B and C of the product, and all three phases of the interfaces 1 of the remaining products, and ground them at the product end, and then you can perform the withstand voltage test. In this way, you can complete the B phase, C phase, and three-phase tests of the subsequent products in turn. The tooling can realize the simultaneous installation of multiple products, and operations such as vacuuming and filling SF6 gas on the interface 1 of each group of products can also be carried out simultaneously, which greatly reduces the test time and does not affect the judgment of problematic products. After the test is completed, the gas can be recovered and each product can be removed for the next process.
[0024] As a further preferred technical solution, in this embodiment, the single-phase isolating transfer switch 2 includes a shell 21, a static contact seat 22, a moving contact seat 23, a moving contact 24, a transmission assembly 25 and a driving member 26 for driving the moving contact 24 to reciprocate between the static contact seat 22 and the moving contact seat 23. The static contact seat 22 and the moving contact seat 23 are respectively installed in the shell 21 through insulating members 27, the transmission assembly 25 is arranged in the shell 21 and is connected to the moving contact 24, and the driving member 26 is passed through the shell 21 and is connected to the transmission assembly 25. Among them, the static contact seat 22 is installed on the upper side of the housing 21 through the insulating member 27, and the moving contact seat 23 is installed on the lower side of the housing 21 through the insulating member 27. Of course, in other embodiments, the positions of the static contact seat 22 and the moving contact seat 23 can also be adjusted; the insulating member 27 adopts a disc insulator, which is fixedly installed on the housing 21 through fasteners, and sealing members such as O-rings, sealants, and sealing strips are arranged between the housing 21 and the insulating member 27 to ensure a closed environment inside the housing 21. When the switch needs to be changed, the operator operates the driving member 26 externally, and the driving member 26 drives the moving contact 24 to move through the transmission assembly 25, so as to realize the combination and separation of the moving contact 24 and the static contact seat 22, that is, closing and opening the switch.
[0025] Furthermore, in the present embodiment, a movable cavity 231 is provided in the movable contact seat 23, the movable contact 24 penetrates the movable contact seat 23 and extends into the movable cavity 231, the transmission assembly 25 includes an insulating rod 255, and a first connecting rod 251, a limiting plate 252, a limiting rod 253 and a second connecting rod 254 provided in the movable cavity 231, one end of the insulating rod 255 is connected to the driving member 26, and the other end is fixedly connected to one end of the first connecting rod 251, the other end of the first connecting rod 251 is fixedly connected to one end of the limiting rod 253, the other end of the limiting rod 253 is fixedly connected to one end of the second connecting rod 254, the other end of the second connecting rod 254 is hinged to the movable contact 24, the limiting plate 252 is fixedly installed on the side wall of the movable cavity 231 by fasteners, the limiting plate 252 is provided with an arc guide groove 256, and the limiting rod 253 extends into the arc guide groove 256. Through the design of the movable cavity 231, the double connecting rod, the limit plate 252, and the limit rod 253, the movable space during opening and closing is greatly reduced, which is beneficial to the layout of the single-phase isolating transfer switch 2 in the product interface 1.
[0026] Furthermore, in this embodiment, the driving member 26 is a driving shaft, the driving member 26, the insulating rod 255 and the limiting rod 253 are all arranged horizontally, and the moving contact 24, the first connecting rod 251 and the second connecting rod 254 are all arranged vertically, the structure is simple and compact, and the volume of the single-phase isolating transfer switch 2 is reduced. The driving shaft can be rotated manually or electrically.
[0027] Furthermore, in the present embodiment, the limit plate 252 is located between the first connecting rod 251 and the insulating rod 255, and the limit plate 252 is provided with a through hole 257 at the center of the arc guide groove 256, and the insulating rod 255 is provided with a mounting hole 258 at one end away from the driving member 26, and the end provided with the mounting hole 258 movably passes through the through hole 257, that is, the limit plate 252 fixed on the moving contact seat 23 utilizes the through hole 257 to avoid interfering with the rotational movement of the insulating rod 255, and the first connecting rod 251 is interference fit with the mounting hole 258, that is, the first connecting rod 251 is tightly inserted in the mounting hole 258, so that the insulating rod 255 can drive the first connecting rod 251 to rotate.
[0028] Furthermore, a connecting pin 28 is installed at one end of the insulating rod 255 away from the driving member 26, and the insulating rod 255 is key-connected to the connecting pin 28, that is, the insulating rod 255 drives the connecting pin 28 to rotate through the transmission key, and the connecting pin 28 movably passes through the through hole 257. The mounting hole 258 is provided on the connecting pin 28, that is, the first connecting rod 251 is tightly inserted into the connecting pin 28, and an elastic member 29 is abutted between the end of the connecting pin 28 and the end of the insulating rod 255. A limiting clamp 281 with a diameter larger than the diameter of the through hole 257 is clamped on the connecting pin 28, and the limiting clamp 281 is tightly attached to the side of the limiting plate 252 close to the insulating rod 255. This structure facilitates the processing and assembly of the transmission component 25; the elastic member 29 realizes the axial flexible connection between the insulating rod 255 and the connecting pin 28 to reduce impact and vibration; the limiting clamping ring 281 is used for limiting to prevent the connecting pin 28 and the insulating rod 255 from separating under the action of the elastic member 29; the limiting clamping ring 281 is clamped on the connecting pin 28 by its own bayonet, which is convenient for disassembly and assembly.
[0029] Furthermore, in this embodiment, the central angle of the arc guide groove 256 is 180°. That is, the driving member 26 can achieve a complete closing effect or opening effect after rotating 180°. The central angle of the arc guide groove 256 is set to 180°, and the limit rod 253 can achieve self-locking in the up and down directions after rotating into place, avoiding malfunction of the device itself and improving reliability.
[0030] As a further preferred technical solution, in this embodiment, the movable contact seat 23 is provided with a plurality of seals along the axial direction of the movable contact 24. The seals may be O-rings, etc. The seals may ensure a closed environment in the movable cavity 231.
[0031] The working principle of the single-phase isolating transfer switch 2 is as follows:
[0032] Starting from the closing position, the manual or electric mechanism rotates the driving member 26 counterclockwise, and the insulating rod 255 and the first connecting rod 251 are also driven to rotate at the same time. The first connecting rod 251 then drives the limiting rod 253 to move along the arc guide groove 256. The limiting rod 253 moves while driving the second connecting rod 254. The second connecting rod 254 then drives the moving contact 24 to move downward, so that the moving contact 24 is separated from the static contact seat 22. When the driving member 26 rotates to 180°, it is limited by the limiting plate 252 to stop moving, thereby achieving the effect of complete isolation and opening. Similarly, when the closing is required, the driving member 26 is rotated 180° clockwise to the limiting plate 252 to stop, so as to achieve the complete closing effect.
[0033] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.
Claims
1. A GIS pressure test tool, comprising at least one set of product interfaces (1), characterized in that: Each phase of each group of product interfaces (1) is equipped with a single-phase isolating conversion switch (2), and the single-phase isolating conversion switch (2) comprises a housing (21), a stationary contact seat (22), a moving contact seat (23), a moving contact (24), a transmission assembly (25), and a driving member (26) for driving the moving contact (24) to reciprocate between the stationary contact seat (22) and the moving contact seat (23), the stationary contact seat (22) and the moving contact seat (23) are respectively installed in the housing (21) through an insulating member (27), the transmission assembly (25) is arranged in the housing (21) and is connected to the moving contact (24), and the driving member (26) is passed through the housing (21) and is connected to the transmission assembly (25). A movable cavity (231) is provided in the movable contact seat (23); the movable contact (24) penetrates the movable contact seat (23) and extends into the movable cavity (231); the transmission assembly (25) comprises an insulating rod (255), and a first connecting rod (251), a limiting plate (252), a limiting rod (253) and a second connecting rod (254) provided in the movable cavity (231); one end of the insulating rod (255) is connected to the driving member (26), and the other end is fixedly connected to one end of the first connecting rod (251); the other end of the first connecting rod (251) is fixedly connected to one end of the limiting rod (253); the other end of the limiting rod (253) is fixedly connected to one end of the second connecting rod (254). The movable contact (24) is fixedly connected, the other end of the second connecting rod (254) is hinged to the movable contact (24), the limiting plate (252) is fixedly installed on the side wall of the movable cavity (231), an arc guide groove (256) is provided on the limiting plate (252), the limiting rod (253) extends into the arc guide groove (256), the driving member (26) is a driving shaft, the driving member (26), the insulating rod (255) and the limiting rod (253) are all arranged horizontally, the movable contact (24), the first connecting rod (251) and the second connecting rod (254) are all arranged vertically, the central angle corresponding to the arc guide groove (256) is 180°, the limiting plate (252) is located at the first connecting rod (251 ) and the insulating rod (255), the limiting plate (252) is provided with a through hole (257) at the center of the arc guide groove (256), the end of the insulating rod (255) away from the driving member (26) is provided with a mounting hole (258), and the end provided with the mounting hole (258) movably passes through the through hole (257), the first connecting rod (251) and the mounting hole (258) are interference fit, the end of the insulating rod (255) away from the driving member (26) is provided with a connecting pin (28), the insulating rod (255) is key-connected with the connecting pin (28), the connecting pin (28) movably passes through the through hole (257), and the mounting hole (258) is provided on the connecting pin (28),An elastic member (29) is disposed between the end of the connecting pin (28) and the end of the insulating rod (255) to achieve an axial flexible connection. A limiting clamp ring (281) having a diameter greater than that of the through hole (257) is disposed on the connecting pin (28). The limiting clamp ring (281) is in close contact with a side of the limiting plate (252) close to the insulating rod (255).
2. The GIS pressure test tool according to claim 1 is characterized in that: The insulating member (27) is a disc-type insulator, and a sealing member is provided between the housing (21) and the insulating member (27).
3. The GIS pressure test tool according to claim 1 is characterized in that: The moving contact seat (23) is provided with a plurality of sealing members along the axial direction of the moving contact (24).