Universal insulator string power frequency arc test tool

Abstract

The utility model belongs to arc test tooling technical field discloses a kind of general insulator string power frequency arc test tooling, comprising: connecting test product upper end device and connecting test product lower end device;One end of the connecting test product upper end device is connected with an insulator by connecting transition piece, and the other end has protruding connecting block;One end of the connecting test product lower end device has the connecting groove matched with protruding connecting block, and the other end is connected with an insulator by connecting transition piece, and the other end of the insulator is connected with tension meter by connecting transition piece;Copper bar and short-circuit arc wire connection copper bar are arranged on the connecting test product upper end device and the connecting test product lower end device.The utility model can solve the problem that the two ends of the test product cannot be quickly connected to the test loop during the existing installation process, and shorten the time for replacing different test products during testing.

Description

Technical Field

[0001] This utility model belongs to the technical field of arc testing fixtures, specifically relating to a general-purpose insulator string power frequency arc testing fixture. Background Technology

[0002] Power frequency arc tests were conducted on porcelain, glass, and composite disc insulator strings (hereinafter referred to as test specimens) used in AC overhead lines and traction lines to simulate the actual operating conditions. During the test, the test specimens were fixed on a frame simulating the operating conditions. The two ends of the test specimen were short-circuited by copper wire with a cross-sectional area not exceeding 1 mm², with the copper wire perpendicular to the edge of the skirts from top to bottom. After each power frequency arc test, the bottom insulator was replaced with a new one. After the new insulator was installed, the top five insulators were rotated horizontally by 90°. The test specimens underwent three power frequency arc tests. A tensile load of 5 kN was applied to the bottom of each test specimen to simulate the tensile force under actual operating conditions. Replacing the old insulators with new ones required three people to operate each test. Furthermore, due to the variety of insulator types and specifications in actual testing, the test specimens could not be installed quickly and easily, resulting in reduced work efficiency and increased operating costs of the testing equipment.

[0003] Chinese patent publication number CN112557857A, entitled "A Testing Fixture and Method for Electrically Testing Support Insulators," describes a testing fixture comprising a first connector, a second connector, and a cylindrical body open at both ends. At least one first connector is used, with each connector connecting two support insulators in series. The second connector has a first end connected to a conductor of a testing device and a second end connected to the first-end support insulator in the series connection. The first end of the cylindrical body is connected to the testing device, and the first connector, second connector, and support insulators are housed within the cylindrical body. A cover is attached to the second end of the cylindrical body. However, this patent application's fixture suffers from inconvenient disassembly and difficulty in quickly connecting the two ends of the test sample to the test circuit. 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 universal insulator string power frequency arc test fixture, which is divided into a device for connecting the upper end of the test specimen and a device for connecting the lower end of the test specimen, both of which are equipped with cable connection copper busbars and short-circuit arc-leading wire connection copper busbars, so as to solve the problem that the two ends of the test specimen cannot be quickly connected to the test circuit during the existing installation process, and shorten the time for changing different test specimens during the test.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A general-purpose insulator string power frequency arc test fixture includes: a device for connecting the upper end of the test specimen and a device for connecting the lower end of the test specimen; one end of the device for connecting the upper end of the test specimen is connected to an insulator via a connecting transition piece, and the other end has a protruding connecting block; one end of the device for connecting the lower end of the test specimen has a connecting groove that matches the protruding connecting block, and the other end is connected to an insulator via a connecting transition piece, and the other end of the insulator is connected to a tension gauge via the connecting transition piece; both the device for connecting the upper end of the test specimen and the device for connecting the lower end of the test specimen are provided with a cable connection copper busbar and a short-circuit arc-leading wire connection copper busbar.

[0006] Optionally, the other end of the insulator connected to the upper end device of the test sample is connected to a fixed support frame via a connecting transition piece; the other end of the tension gauge away from the insulator is connected to a fixed support frame.

[0007] Optionally, both the cable connector copper busbar and the shorting arc wire connector copper busbar are provided with at least two connection holes, and both the upper and lower connection test device are provided with connection holes corresponding to the positions of the connection holes of the cable connector copper busbar and the shorting arc wire connector copper busbar.

[0008] Optionally, the connection holes of the cable busbar and the shorting arc wire busbar are connected to the connection holes of the upper end device and the lower end device of the test specimen by a second fastener.

[0009] Optionally, the second fastener is a bolt and is fitted with a spring washer and a nut.

[0010] Optionally, the tension gauge is connected to the connecting transition member via a connecting transition support member.

[0011] Optionally, the connecting transition member is a plate.

[0012] Optionally, the insulator has connecting rods at both ends, and each connecting rod has a connecting hole.

[0013] Optionally, the connecting transition member has two connecting holes at both ends; the end where the upper device of the connecting sample is connected to the connecting transition member and the end where the lower device of the connecting sample is connected to the connecting transition member both have connecting holes.

[0014] Optionally, the connection hole of the upper end device connecting the sample and the connection hole of the connecting transition piece, as well as the connection hole of the lower end device connecting the sample and the connection hole of the connecting transition piece, are all connected by a first fastener.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention takes into account the characteristics of power frequency arc testing of insulator strings. The fixture is divided into a device for connecting the upper end of the test specimen and a device for connecting the lower end of the test specimen. The short-circuit arc-leading wire connecting copper busbars in the upper and lower parts of the fixture can be replaced. During the power frequency arc test, the arc will burn out from the farthest end of the short-circuit arc-leading wire connecting copper busbar. When the short-circuit arc-leading wire connecting copper busbar is severely burned out, and the length of the short-circuit arc-leading wire connecting copper busbars at the upper and lower parts is not long enough to meet the test requirements, the short-circuit arc-leading wire connecting copper busbar can be removed from the device for connecting the upper end of the test specimen and the device for connecting the lower end of the test specimen, and a new short-circuit arc-leading wire connecting copper busbar can be replaced. This can be completed by a single person.

[0016] During the test preparation process, the upper and lower parts of the fixture are connected to the fixed support frame, and the test circuit cable is connected to the copper busbar of the cable terminal of the fixture. When replacing the insulator or insulator string, it is not necessary to remove the screws and disconnect the connecting cable from the test specimen. Simply separate the fixture from the test specimen, which further shortens the test specimen replacement time during the test. It is also simple and convenient, and two people can complete the test specimen replacement together.

[0017] The parts of this test fixture that connect to the test specimen can be replaced to match appropriate dimensions and meet the test requirements of different specifications and models of test specimens. Attached Figure Description

[0018] 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: Figure 1 This is a schematic diagram of the device for connecting the upper end of the test sample according to this utility model; Figure 2 This is a schematic diagram of the device for connecting the lower end of the test sample according to this utility model; Figure 3 This is a schematic diagram of the protruding connecting block and connecting groove of this utility model; Among them, 1. Fixed support frame; 2. Composite insulator; 3. Cable connection copper busbar; 4. Short-circuit arc-leading wire connection copper busbar; 5. Connecting device for the upper end of the test specimen; 51. Protruding connecting block; 6. Connecting device for the lower end of the test specimen; 62. Connecting groove; 7. Tensile gauge; 8. Connecting transition support; 9. Connecting transition support; 10. First fastener; 11. Second fastener. Detailed Implementation

[0019] 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.

[0020] Therefore, the following detailed description of 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] This utility model discloses a universal insulator string power frequency arc testing fixture, comprising: a device 5 for connecting the upper end of the test specimen and a device 6 for connecting the lower end of the test specimen; one end of the device 5 is connected to an insulator 2 via a connecting transition piece 8, and the other end has a protruding connecting block 51; one end of the device 6 has a connecting groove 61 that matches the protruding connecting block 51, and the other end is connected to an insulator 2 via the connecting transition piece 8, the other end of which is connected to a tension gauge 7 via the connecting transition piece 8. Both the device 5 and the device 6 are equipped with cable connection copper busbars 3 and short-circuit arc-leading wire connection copper busbars 4.

[0027] The short-circuit arc-leading wire connecting copper busbars 4 in the upper and lower parts of this utility model tool can be replaced. During the power frequency arc test, the arc will burn out from the farthest end of the short-circuit arc-leading wire connecting copper busbar 4. When the short-circuit arc-leading wire connecting copper busbar 4 is severely burned out, and the length of the short-circuit arc-leading wire connecting copper busbars 4 at the upper and lower parts is not long enough to meet the test requirements, the short-circuit arc-leading wire connecting copper busbar 4 can be removed from the upper end device 5 and the lower end device 6 of the test specimen, and a new short-circuit arc-leading wire connecting copper busbar 4 can be replaced. This can be completed by a single person.

[0028] During test preparation, the upper and lower parts of the fixture are connected to the fixed support frame 1. The test circuit cable is connected to the copper busbar 3 of the fixture's cable connector. When replacing insulators or insulator strings, it is not necessary to disassemble the screws. Simply disconnect the connecting cable from the test specimen, and the fixture is separated from the specimen. This further shortens the time for changing the specimen during the test, and is simple and convenient. Two people can complete the specimen replacement together. The parts of this test fixture that connect to the specimen can be replaced to match appropriate sizes, meeting the test requirements of different specifications and models of specimens.

[0029] Example 1 During the power frequency arc test, both ends of the test specimen need to be fixed on the fixed support frame 1. The test fixture includes a device 5 for connecting the upper end of the test specimen and a device 6 for connecting the lower end of the test specimen.

[0030] A rod is connected to the bottom of the upper end device 5 for connecting the sample, and the end of the rod has a protruding connecting block 51.

[0031] An insulator 2 is connected to the top of the upper end device 5 of the test sample via a connecting transition piece 8.

[0032] The top of the connecting sample lower end device 6 has a connecting groove 61 that matches the protruding connecting block 51. The bottom of the connecting sample lower end device 6 is connected to an insulator 2 through a connecting transition member 8. The other end of the insulator 2 is connected to a connecting transition support member 9 through the connecting transition member 8. The other end of the connecting transition support member 9 is connected to a tension gauge 7.

[0033] The other end of the insulator 2, which is connected to the upper end device 5 of the test sample, is connected to a fixed support frame 1 via a connecting transition piece 8; the other end of the tension gauge 7, which is away from the insulator 2, is connected to the fixed support frame 1.

[0034] Optionally, insulator 2 is a composite insulator made of silicone.

[0035] Optionally, insulator 2 is 1.2 meters long, has a maximum tensile strength of 120 kN, is lightweight, not easily damaged, and its insulation meets the requirements of the test voltage level.

[0036] Optionally, the connecting transition piece 8 is a plate with connecting holes at both ends.

[0037] Optionally, the insulator 2 has connecting rods at both ends, and each connecting rod has a connecting hole.

[0038] Optionally, the end of the transition support 9 that connects to the connecting transition member 8 is provided with a connecting hole. Furthermore, the connecting hole on the connecting rod of the insulator 2, which is connected to the upper end device 5 of the connecting sample, is connected to the connecting hole of the connecting transition member 8 by a first fastener 10. The connecting hole on the transition support member 9 is connected to the connecting hole of the connecting transition member 8 by the first fastener 10.

[0039] Both the end connecting the upper end device 5 of the test sample to the connecting transition piece 8 and the end connecting the lower end device 6 of the test sample to the connecting transition piece 8 are provided with connecting holes. The connecting holes of the upper end device 5 and the connecting transition piece 8, as well as the connecting holes of the lower end device 6 and the connecting transition piece 8, are connected by the first fastener 10.

[0040] Optionally, the first fastener 10 is a cylindrical pin with a diameter of 16mm, made of 45 steel, and a retaining ring is installed on the first fastener 10 to prevent loosening.

[0041] Both the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are provided with at least two connection holes. Both the upper end device 5 and the lower end device 6 of the connection test specimen are provided with connection holes corresponding to the positions of the connection holes of the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4.

[0042] Optionally, the connecting holes on the cable connector copper busbar 3 and the connecting holes on the shorting arc wire connector copper busbar 4 are arranged along the long axis of the cable connector copper busbar 3 and the long axis of the shorting arc wire connector copper busbar 4, respectively. Optionally, there are two, three, or four connecting holes on the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4.

[0043] The connection holes of the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are connected to the connection holes of the upper end device 5 and the lower end device 6 of the test specimen by the second fastener 11.

[0044] Optionally, the second fastener 11 is a bolt with a diameter of 12mm, and a nut and a spring washer are installed on the second fastener 11 to prevent loosening.

[0045] Optionally, both the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are connected at one end to the upper end device 5 of the test specimen and the other end extends out; and both the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are connected at one end to the lower end device 6 of the test specimen and the other end extends out.

[0046] Furthermore, both the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are perpendicular to the long axis direction of the upper end device 5 of the test specimen; both the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are perpendicular to the long axis direction of the lower end device 6 of the test specimen.

[0047] Furthermore, a first fastener 10 is installed on the protruding end of the cable connector copper busbar 3.

[0048] Furthermore, the extension direction of the cable connector copper busbar 3 is opposite to the extension direction of the shorting arc wire connector copper busbar 4; the cable connector copper busbar 3 and the shorting arc wire connector copper busbar 4 are arranged in parallel.

[0049] Example 2 In the test setup, one end of the test circuit is connected to the copper busbar 3 of the cable connecting the upper device 5 of the test specimen, and the other end is connected to the copper busbar 3 of the cable connecting the lower device 6 of the test specimen. The entire test specimen is connected in series in the test circuit.

[0050] The upper device 5 connecting the sample to the circuit connection cable does not need to be disassembled during sample replacement; simply disconnect the sample from the upper device 5.

[0051] The lower end device 6 of the test specimen is connected to the circuit connection cable. During the replacement of the bottom insulator 2 of the test specimen or the replacement of the entire test specimen, it is not necessary to disassemble it. It is only necessary to disconnect the connecting transition piece 8 between the lower end device 6 of the test specimen and the insulator 2.

[0052] The cable connector copper busbar 3 allows for convenient connection to the test circuit busbar; the arc-starting wire connector copper busbar 4 can fix the arc-starting wire to both ends of the insulator string 2. When the test personnel are winding the arc-starting wire on site, they only need to wind the copper wire around both ends of the short-circuit arc-starting wire connecting copper busbar 4 to meet the test setup requirements.

[0053] 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.

[0054] 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 universal insulator string power frequency arc testing fixture, characterized in that, include: The upper end device (5) and the lower end device (6) of the test specimen are connected; one end of the upper end device (5) is connected to an insulator (2) through a connecting transition piece (8), and the other end has a protruding connecting block (51); one end of the lower end device (6) of the test specimen has a connecting groove (61) that matches the protruding connecting block (51), and the other end is connected to an insulator (2) through a connecting transition piece (8), and the other end of the insulator (2) is connected to a tension gauge (7) through a connecting transition piece (8); both the upper end device (5) and the lower end device (6) of the test specimen are provided with a cable connection copper busbar (3) and a short-circuit arc-leading wire connection copper busbar (4).

2. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, The other end of the insulator (2) connected to the upper end device (5) of the test sample is connected to a fixed support frame (1) via a connecting transition piece (8); the other end of the tension gauge (7) away from the insulator (2) is connected to a fixed support frame (1).

3. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, At least two connection holes are provided on both the cable connection copper busbar (3) and the shorting arc wire connection copper busbar (4). The upper end device (5) and the lower end device (6) of the connection sample are provided with connection holes corresponding to the positions of the connection holes of the cable connection copper busbar (3) and the shorting arc wire connection copper busbar (4).

4. The universal insulator string power frequency arc test fixture according to claim 3, characterized in that, The connection holes of the cable connection copper busbar (3) and the connection holes of the short-circuit arc wire connection copper busbar (4) are connected to the connection holes of the upper end device (5) and the lower end device (6) of the test specimen by a second fastener (11).

5. The universal insulator string power frequency arc test fixture according to claim 4, characterized in that, The second fastener (11) is a bolt and is fitted with a spring washer and a nut.

6. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, The tension gauge (7) is connected to the connecting transition member (8) via the connecting transition support member (9).

7. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, The connecting transition piece (8) is a plate.

8. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, The insulator (2) has connecting rods at both ends, and each connecting rod has a connecting hole.

9. The universal insulator string power frequency arc test fixture according to claim 1, characterized in that, The connecting transition piece (8) has two connecting holes at both ends; the connecting sample upper end device (5) and the connecting transition piece (8) are both connected with connecting holes at one end and the connecting sample lower end device (6) and the connecting transition piece (8).

10. A universal insulator string power frequency arc test fixture according to claim 9, characterized in that, The connection holes of the upper end device (5) connecting the sample and the connection holes of the transition piece (8), as well as the connection holes of the lower end device (6) connecting the sample and the transition piece (8), are all connected by the first fastener (10).

Images