A double-ended ground test wire board grounding clip

Abstract

The application discloses a double-terminal grounding test line board grounding clamp, which comprises a first grounding clamp and a second grounding clamp, and the first grounding clamp is longitudinally clamped on a GIS connection line board to be grounded and tested. The first grounding clamp comprises a movable clamp, a fixed clamp, a screw rod and a screw rod handle. A wiring screw rod is arranged on one side of the movable clamp, and the wiring screw rod is used for connecting a grounding wire. The screw rod is provided with a thread, penetrates through the movable clamp and the fixed clamp, and is rotated in cooperation with a threaded hole of the movable clamp and the fixed clamp. The screw rod handle is connected with the screw rod at a protruding part of the screw rod penetrating through the fixed clamp, and is used for adjusting extension and contraction of the screw rod. The application improves flexibility of a fixing mode of the GIS connection line board, safety and convenience of a test process of an operation and maintenance personnel, and accuracy of a test result.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of GIS equipment grounding test, and particularly relates to a double-ended grounding test line board grounding clamp. BACKGROUND

[0002] At present, 500kV substations adopt 3 / 2 wiring mode, and circuit breakers can be repaired without power-off of lines. However, due to the coupling effect between each conductor of 500kV double-circuit or multi-circuit lines in operation, a large induced voltage and induced current are generated in the line to which the circuit breaker is connected, which may even break the disconnecting switch on the two sides of the circuit breaker and endanger the personal safety of the test personnel. Therefore, during the mechanical characteristic test of the 500kV circuit breaker, the circuit breaker must be grounded on the two sides.

[0003] However, when the double-ended grounding test is performed on the 500kV GIS equipment by using the alternating current sensor method, the violent vibration generated when the GIS equipment operates is transmitted to the alternating current sensor through the grounding copper bar, thus a large deviation error test result is generated, and the accuracy of the test result is greatly reduced. Moreover, due to the small gap between the grounding copper bar and the shell of part of the GIS, the pincer current / voltage sensor cannot be connected for measurement, and the mechanical characteristic test needs to be performed by stopping the power supply of the line and removing the grounding copper bar on the two sides.

[0004] Therefore, it is of great significance to provide an auxiliary device capable of leading out a set of grounding bypass from the position of the grounding copper bar which cannot be connected with the sensor for test. SUMMARY

[0005] The application provides a double-ended grounding test line board grounding clamp, which is used for being quickly installed to a GIS line board and leading out a grounding bypass for operation of an operation and maintenance personnel.

[0006] The application provides a double-ended grounding test line board grounding clamp, which comprises first and second grounding clamps which are identical in structure; the first grounding clamp is vertically clamped on a GIS line board which needs to be grounded for test.

[0007] The first grounding clamp comprises a movable clamp, a fixed clamp, a lead screw and a lead screw handle; one side of the movable clamp is provided with a wiring screw rod which is used for connecting a grounding wire; the lead screw is provided with a thread, the lead screw penetrates through the movable clamp and the fixed clamp, and is rotated in cooperation with the threaded holes of the movable clamp and the fixed clamp; the lead screw handle is connected with the lead screw at the protruding part of the lead screw which penetrates through the fixed clamp, and the lead screw handle is used for adjusting the extension and contraction of the lead screw.

[0008] Optionally, the lead screw is provided with a connecting hole at the protruding part of the lead screw which penetrates through the fixed clamp, and the connecting hole is used for being connected with the lead screw handle.

[0009] Optionally, the screw handle is a rod-shaped body, and a front end of the screw handle is provided with a thread matched with the thread of the connecting hole.

[0010] Optionally, a rear end of the screw handle is sleeved with a handle.

[0011] Optionally, the handle is provided with an embossing.

[0012] Optionally, the handle is specifically a rubber tube handle.

[0013] Optionally, two compression springs are further arranged between the movable clamp and the fixed clamp, and the compression springs are distributed on both sides of the screw rod.

[0014] Optionally, the compression spring is a conical compression spring.

[0015] Optionally, the compression spring is a cylindrical compression spring.

[0016] Optionally, the material of the double-end grounding test line board grounding clamp is aluminum alloy.

[0017] From the above technical solutions, the embodiments of the present application have the following advantages:

[0018] In the present application, a double-end grounding test line board grounding clamp is provided, which comprises a first grounding clamp and a second grounding clamp; the first grounding clamp is vertically clamped on a GIS line board to be grounded; the first grounding clamp comprises a movable clamp, a fixed clamp, a screw rod and a screw handle; one side of the movable clamp is provided with a wiring screw rod for connecting a grounding wire; the screw rod is provided with a thread, and the screw rod penetrates through the movable clamp and the fixed clamp and is matched with the threaded holes of the movable clamp and the fixed clamp for rotation; the screw handle is connected with the screw rod at a protruding part of the screw rod penetrating through the fixed clamp, and the screw handle is used for adjusting the extension and contraction of the screw rod.

[0019] The thread holes of the screw rod and the screw handle on the movable clamp are matched for rotation, the movable clamp is adjusted, the movable clamp and the fixed clamp are tightly clamped on the GIS line board, and the grounding wire is led out from the wiring screw rod of the first grounding clamp for operation of the maintenance personnel, thereby improving the flexibility of the GIS line board fixing mode, the safety and convenience of the test process of the maintenance personnel, and the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a schematic diagram of the composition of the double-end grounding test line board grounding clamp provided in the embodiments of the present application;

[0021] Figure 2This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure One ;

[0022] Figure 3 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Two ;

[0023] Figure 4 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Three ;

[0024] Figure 5 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Four .

[0025] in:

[0026] 1 is the GIS board, 2 is the movable clamp, 3 is the guide rail rod, 4 is the fixed clamp, 5 is the compression spring, 6 is the lead screw, 7 is the lead screw handle, 8 is the wiring screw, 9 is the grounding wire, 10 is the grounding copper busbar, and 11 is the insulating baffle. Detailed Implementation

[0027] This application provides a grounding clamp for a double-ended grounding test board, which is used for quick installation onto a GIS board and provides a grounding bypass for operation by maintenance personnel.

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Currently, the AC sensor method used for double-ended grounding testing of 500kV GIS equipment suffers from significant errors. The severe vibrations generated during GIS equipment operation are transmitted to the AC sensor via the grounding copper busbar, leading to highly inaccurate test results. Furthermore, the insufficient gap between some GIS grounding copper busbars and the casing prevents the connection of clamp-on current / voltage sensors, necessitating the de-energization of the line and the removal of both grounding copper busbars for mechanical characteristic testing. To facilitate regular testing of key plant sites and identify potential hazards while ensuring the safety of testing personnel and to improve the accuracy of test results, it is necessary to research solutions to these problems and conduct mechanical characteristic tests without power outages, filling a market gap. Please refer to [link to relevant documentation]. Figure 1 This application provides a schematic diagram of the composition of a double-ended grounding test board grounding clamp, including: a first grounding clamp and a second grounding clamp; the first grounding clamp is vertically clamped to the GIS terminal block 1 that needs to be grounded for testing.

[0032] The first grounding clamp includes: a movable clamp 2, a fixed clamp 4, a lead screw 6, and a lead screw handle 7; a wiring screw 8 is disposed on one side of the movable clamp 2, and the wiring screw 8 is used to connect the grounding wire 9; the lead screw 6 is threaded, and the lead screw 6 passes through the movable clamp 2 and the fixed clamp 4, and rotates in cooperation with the threaded holes of the movable clamp 2 and the fixed clamp 4; the lead screw handle 7 is connected to the lead screw 6 at the protruding part of the lead screw 3 that passes through the fixed clamp 4, and the lead screw handle 7 is used to adjust the extension and retraction of the lead screw 6.

[0033] In this embodiment of the invention, the screw 6 and the screw handle 7 are rotated in the threaded holes of the movable clamp 2 and the fixed clamp 4 to clamp the movable clamp 2 and the fixed clamp 4 on the GIS clamping plate 1, thereby preventing the grounding clamp of the double-ended grounding test plate from falling off.

[0034] In practice, after the second grounding clamp is connected to the GIS equipment in any of the existing methods, only the grounding wire 9 needs to be connected to the connecting screw 8 where the first clamp is located. When conducting grounding tests, it is only necessary to disconnect the connection point on one side of the grounding copper busbar. During the test, there is no need to de-energize the circuit breaker line, which is quick and convenient. At the same time, an insulating baffle is added to ensure insulation safety.

[0035] In an optional embodiment, the lead screw 6 has a connecting hole in the protruding portion of the lead screw 6 that passes through the fixing clamp, the connecting hole being used to connect with the lead screw handle 7.

[0036] In an optional embodiment, the lead screw handle 7 is a rod-shaped body, and the front end of the lead screw handle 7 is threaded to engage with the threaded connection hole.

[0037] In this embodiment of the invention, the lead screw 6 and the lead screw handle 7 are threadedly connected. When in use, the lead screw handle 7 of different lengths can be replaced to adapt to different space sizes and make operation more convenient.

[0038] In an alternative embodiment, a handle is sleeved at the rear end of the lead screw handle 7.

[0039] In one alternative embodiment, the handle is embossed.

[0040] In one alternative embodiment, the grip is specifically a rubber tube grip.

[0041] In this embodiment of the invention, a rubber tube handle is provided at the tail of the lead screw handle 7. When in use, the force is concentrated at the hand handle, and the handle is embossed, making it less prone to slipping and more labor-saving.

[0042] In an optional embodiment, two compression springs 5 ​​are further provided between the movable clamp 2 and the fixed clamp 4, and the compression springs 5 ​​are distributed on both sides of the lead screw 6.

[0043] In an alternative embodiment, the compression spring 5 is a conical compression spring.

[0044] In an alternative embodiment, the compression spring 5 is a cylindrical compression spring.

[0045] In this embodiment of the invention, compression springs 5 ​​are equidistantly distributed on both sides of the lead screw 6 in the movable clamp 2 and the fixed clamp 4. The deformation of the compression springs 5 ​​is adjusted by the guide rail rod 3, thereby adjusting the stretching direction and the magnitude of the stretching force of the compression springs 5. Furthermore, the compression springs 5 ​​can be either conical or cylindrical.

[0046] In one optional embodiment, the grounding clamp of the double-ended grounding test board is made of aluminum alloy.

[0047] In this embodiment of the invention, to ensure durability and structural reliability, the material used is an aluminum alloy connecting plate design, which is durable and corrosion-resistant.

[0048] In addition, a specific implementation method for testing the mechanical characteristics of a double-ended grounding test board grounding clamp according to the present invention is as follows:

[0049] Step 1, please refer toFigure 2 , Figure 2 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure One First, connect the double-ended grounding test board grounding clamp between the GIS equipment and the grounding grid 9. Specifically, connect one end of the double-ended grounding test board grounding clamp to the grounding copper busbar 10 and the other end to the grounding grid 9 to form a grounding bypass between the GIS equipment and the grounding grid 9.

[0050] Step 2, please refer to Figure 3 , Figure 3 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Two Remove the screws on the grounding copper busbar 10 grounding grid side and remove the fixing plate on that side. Because the grounding bypass device of this embodiment of the invention has been connected at this time, even if the screws on the grounding copper busbar 10 connecting to the grounding grid are removed, a reliable and effective grounding circuit for the GIS equipment can still be guaranteed.

[0051] Step 3, please refer to Figure 4 and Figure 5 , Figure 4 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Three , Figure 5 This illustration shows a specific implementation method for conducting mechanical characteristic tests on a double-ended grounding test strip grounding clamp provided in this application embodiment. Figure Four An isolation baffle 11 is installed between the equipment grounding grid connection side and the grounding copper busbar 10, and the GIS equipment is connected to the grounding copper busbar 10 after the isolation baffle 11 to ensure that the original grounding circuit is effectively disconnected.

[0052] Step four: The grounding bypass between the GIS equipment and the grounding grid 9, which is formed by the grounding clamp of the double-ended grounding test line of the present invention, is used to conduct the test, which effectively avoids vibration during the test, improves work efficiency, and ensures the safety of the test.

[0053] The present invention provides a grounding clamp for a double-ended grounding test board, comprising: a first grounding clamp and a second grounding clamp; the first grounding clamp is vertically clamped to the GIS terminal block 1 to be grounded; the first grounding clamp includes: a movable clamp 2, a fixed clamp 4, a lead screw 6, and a lead screw handle 7; a wiring screw 8 is disposed on one side of the movable clamp 2, the wiring screw 8 being used to connect a grounding wire 9; the lead screw 6 is threaded, the lead screw 6 passing through the movable clamp 2 and the fixed clamp 4, and rotating in cooperation with the threaded holes of the movable clamp 2 and the fixed clamp 4; the lead screw handle 7 is connected to the lead screw 6 at the protruding part of the lead screw 3 passing through the fixed clamp 4, the lead screw handle 7 being used to adjust the extension and retraction of the lead screw 6.

[0054] By rotating the lead screw 6 and lead screw handle 7 in the threaded hole on the movable clamp, the movable clamp 2 is adjusted so that the movable clamp 2 and the fixed clamp 4 are tightly clamped on the GIS terminal block 1. The grounding wire 9 is led out from the wiring screw 8 of the first grounding clamp for operation by maintenance personnel. This improves the flexibility of the fixing method with the GIS terminal block 1, as well as the safety and convenience of the testing process for maintenance personnel, and the accuracy of the test results.

[0055] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for testing the mechanical characteristics of a double-ended grounding test lead plate grounding clamp, wherein the double-ended grounding test lead plate grounding clamp comprises: The first grounding clamp and the second grounding clamp are characterized in that the first grounding clamp is vertically clamped to the GIS terminal block that needs to be grounded for testing. The first grounding clamp includes: a movable clamp, a fixed clamp, a lead screw, and a lead screw handle; a wiring screw is disposed on one side of the movable clamp, and the wiring screw is used to connect a grounding wire; the lead screw is threaded, and the lead screw passes through the movable clamp and the fixed clamp, and rotates in conjunction with the threaded holes of the movable clamp and the fixed clamp; the lead screw handle is connected to the lead screw at the protruding part of the lead screw passing through the fixed clamp, and the lead screw handle is used to adjust the extension and retraction of the lead screw; The double-ended grounding test lead plate grounding clamp is used in the mechanical characteristic testing method of the double-ended grounding test lead plate grounding clamp, and the specific steps are as follows: Step S1: Connect one end of the grounding clamp of the double-ended grounding test board to the grounding copper busbar. Rotate the movable clamp by using the screw and screw handle in the threaded hole on the movable clamp to clamp the movable clamp and the fixed clamp on the GIS terminal board to connect to the grounding copper busbar. After connecting to the GIS equipment through the second grounding clamp, lead out the grounding wire from the wiring screw of the first grounding clamp, and the other end is grounded to form a grounding bypass. Step S2: Remove the screws on the grounding copper busbar and the grounding grid side, and remove the fixing plate on that side. In step S2, the double-ended grounding test line plate grounding clamp constitutes a grounding bypass between the GIS equipment and the grounding grid and can form a grounding bypass after the screws on the grounding copper busbar and the grounding grid are removed. Step S3: Install an isolation baffle between the grounding grid connection side of the GIS equipment and the grounding copper busbar, and connect the GIS equipment to the grounding copper busbar after the isolation baffle so as to effectively disconnect the original grounding circuit; Step S4: Conduct a test using the grounding bypass between the GIS equipment and the grounding grid formed by the grounding clamp of the double-ended grounding test line board.

2. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 1, characterized in that, The lead screw has a connecting hole at the protruding part through the fixing clamp, and the connecting hole is used to connect to the lead screw handle.

3. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 2, characterized in that, The lead screw handle is a rod-shaped body, and the front end of the lead screw handle is threaded to engage with the threaded connection hole.

4. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 3, characterized in that, A handle is sleeved at the rear end of the lead screw handle.

5. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 4, characterized in that, The handle is embossed.

6. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 4, characterized in that, The grip is specifically a rubber tube grip.

7. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 1, characterized in that, Two compression springs are also provided between the movable clamp and the fixed clamp, and the compression springs are distributed on both sides of the lead screw.

8. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 7, characterized in that, The compression spring is a conical compression spring.

9. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 7, characterized in that, The compression spring is a cylindrical compression spring.

10. The method for testing the mechanical characteristics of the double-ended grounding test board grounding clamp according to claim 1, characterized in that, The grounding clamp of the double-ended grounding test board is made of aluminum alloy.

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