Lightning arrester measuring tool

Abstract

The invention discloses a lightning arrester measuring tool, belongs to the field of lightning arrester testing, and aims to overcome the defects that in the prior art, when lightning arresters of different models are installed, the number of tools needed is large, and time and labor are wasted, the technical scheme for solving the problem is mainly that the lightning arrester measuring tool comprises a testing installation frame, the test mounting rack is fixedly connected with a clamp assembly used for clamping one end of a tested product, the test mounting rack on one side of the clamp assembly is provided with a tension detection member, the tension detection member is connected with the other end of the tested product, and the clamp assembly comprises a test seat assembly fixedly connected with the test mounting rack. The test seat assembly is slidably connected with two clamping seats which are symmetrically arranged. The tool is mainly used for achieving the purpose that one set of tool can be suitable for lightning arresters of different specifications, and the tool is fast and convenient to adjust.

Description

Technical Field

[0001] The present application relates to arrester testing, and in particular to an arrester measuring tool. Background Art

[0002] Lightning arrester is an important protective device used to protect electrical equipment from lightning overvoltage and operating overvoltage. Lightning arrester is usually connected between electrical equipment and the earth. When lightning overvoltage or operating overvoltage acts on electrical equipment, the lightning arrester can quickly conduct and introduce overvoltage current into the earth, thereby limiting the amplitude of overvoltage and protecting the insulation of electrical equipment from damage. When the overvoltage disappears, the lightning arrester can quickly return to the high resistance state, cut off the current path, and enable the normal operation of electrical equipment. In the process of manufacturing lightning arresters, the mechanical properties of lightning arresters are also a very important indicator, such as the tensile test of lightning arresters. In practical applications, lightning arresters usually need to be installed on important facilities such as power lines and substations. The internal structure of the lightning arrester is complex, including components such as electrodes, insulating materials, and discharge gaps. The tensile test can simulate the external force that the lightning arrester may be subjected to during actual use and evaluate the reliability and stability of its structure.

[0003] The conventional practice in the prior art is to develop and produce a set of tooling for a certain type of lightning arrester. As the types of lightning arresters that need to be tested increase, the number of tooling that needs to be developed and produced also increases, and tooling of different types is not interchangeable. The development and production of tooling involves multiple process steps such as mechanical design, mechanical processing, heat treatment, surface treatment, and assembly. The time cost and material cost of developing and producing tooling are relatively high. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art in that the installation of different types of lightning arresters requires a large number of tools, which is time-consuming and labor-intensive, the present application provides a lightning arrester measurement tool, which enables a set of tools to be suitable for lightning arresters of different specifications, and the tooling can be adjusted quickly and conveniently.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a lightning arrester measuring tool, including a test mounting frame, to which a fixture assembly for clamping one end of the product under test is fixedly connected, and a tension detection component is provided on the test mounting frame on one side of the fixture assembly, and the tension detection component is connected to the other end of the product under test, and the fixture assembly includes a test seat assembly fixedly connected to the test mounting frame, and two symmetrically arranged sockets are slidably connected to the test seat assembly.

[0006] After adopting the above technical scheme, the specific test process is: first, the two holders in the fixture assembly are opened away from each other to enlarge the clamping space between the two holders, and then the product to be tested, that is, one end of the arrester, is placed in the clamping space, and then the clamping space between the holders is reduced, so that one end of the product to be tested is clamped by the holder, and the other end is connected to the tension detection component. After the connection is completed, the tension detection component performs a tension test on the product to be tested, and after the test is completed, the holders are moved away from each other to expand the clamping space, and then other arresters of different specifications and thicknesses are tested, and by analogy, the tensile residual number deformation values ​​of various arresters can be measured. The present application has the following advantages: one end of the arrester is clamped and fixed by the fixture assembly, and the clamping parts in the fixture assembly can be moved away from each other to achieve a larger clamping space, so as to clamp a larger product to be tested, which helps the measuring tool to adapt to arresters of more thicknesses, and this new type of arrester test tool can be applied to arresters of different specifications, and the tool adjustment is faster and more convenient.

[0008] Furthermore, after the card holder is moved to a designated position, the test holder assembly is fixedly connected to the card holder via a fixing member.

[0009] By adopting the above-mentioned technical solution, the holder can be fixed at a suitable position by the fixing piece, so as to ensure that the clamping force of the holder on the measured product does not change significantly.

[0011] Furthermore, the card holder includes a connecting portion installed with the test seat assembly, and an elastic member for pushing the two card holders away from each other is provided between the connecting portion and the test seat assembly, and the two card holders are pushed closer to each other by the adjusting member.

[0012] With the above technical solution, the setting of the elastic member enables the holder to automatically spring open a certain distance during installation, which facilitates the placement of the arrester. The operator can easily put the arrester into the fixture assembly, and then move the holder close to the base through the adjustment member to achieve quick installation. The adjustment member can accurately adjust the position of the holder to further adapt to arresters of different sizes. The operator can move the holder to a suitable position through the adjustment member according to the actual size of the arrester to ensure the firmness and stability of the clamping.

[0013] Furthermore, the base and the card holder are detachably connected, and a card slot is provided on the facing surface between the two card holders.

[0014] By adopting the above-mentioned technical solution, the setting of the slot provides a specific placement position for the lightning arrester, so that the lightning arrester can be clamped more firmly between the two sockets. The slot can match the shape of the lightning arrester to increase the contact area, thereby improving the clamping stability. By designing slots of different sizes, it can adapt to lightning arresters of different diameters or shapes.

[0015] Furthermore, the test seat assembly includes a chassis fixed to the test mounting frame, and a base is rotatably connected to the chassis. After the chassis is rotated to a specified position, the base and the chassis can be circumferentially fixed at the position by connecting fixings.

[0016] By adopting the above-mentioned technical solution, the lightning arrester can be subjected to multi-angle tensile testing by rotating the connected base, so as to have a more comprehensive understanding of the stress conditions of the lightning arrester at different angles, thereby more accurately evaluating the reliability and stability of its structure. The data obtained from the multi-angle test can provide an important basis for the design of the lightning arrester. The designer can optimize the structural design of the lightning arrester according to the test results at different angles, so that it can maintain good performance under various stress conditions. The multi-angle test is closer to the stress conditions of the lightning arrester in actual use, so the accuracy and reliability of the test can be improved. Compared with the single-angle test, the multi-angle test can more truly reflect the performance of the lightning arrester in actual work, and provide a stronger guarantee for product quality.

[0017] Furthermore, the tension detection component includes a bracket, the bracket is connected to a telescopic drive mechanism, the telescopic drive mechanism is divided into a mobile end and a fixed end, the fixed end is provided with a telescopic measuring component, the mobile end is connected to a connecting component for connecting to the other end of the measured product, and the connecting component is provided with a measuring surface located on the telescopic path of the measuring component.

[0018] With the above-mentioned technical solution, after the two ends of the arrester are connected to the test fixture, the measuring component is first moved to the measuring surface, and the distance value of the measuring component moving to the measuring surface before the test is measured, and then the telescopic drive mechanism is started and the connecting component is pulled, and the connecting component is driven to pull the arrester under test, and the tension gradually relaxes after reaching the test value until the tension is unloaded, and the measuring component is moved to the measuring surface again, and the distance value of the measuring component moving to the measuring surface after the test is measured, and then the tension of the arrester under test is evaluated. The connection between the other end of the arrester and the connecting component can be in the form of a hinge, so that when the arrester is subjected to a tensile test, stress concentration can be effectively reduced, and the installation between the connecting component and the arrester is also simpler, and can be installed and connected by bolts, making the tensile test more accurate.

[0020] Furthermore, the connecting component includes a connecting member and a transmission member, one end of the transmission member is fixedly connected to the telescopic drive mechanism, the other end of the transmission member is hinged to one end of the connecting member, and the connecting member is hinged to the other end of the tested object.

[0021] Using the above-mentioned technical solution, the transmission part is fixedly connected to the telescopic drive mechanism, and the other end is hinged to the connecting part. This structure enables the connecting component to rotate freely within a certain range, so as to better adapt to the installation requirements of the lightning arrester at different angles and positions. The hinged connection method can effectively reduce stress concentration, and can also adjust the force angle during the tensile test to improve the service life and reliability of the connecting component. When the tensile force acts on the connecting component, the hinge can disperse the stress to avoid damage to the connecting parts due to excessive local stress. During testing, the connecting part and the lightning arrester can be quickly disassembled and assembled.

[0022] Furthermore, a load sensor for detecting the magnitude of the pulling force is provided between the connecting assembly and the telescopic driving mechanism.

[0023] By adopting the above-mentioned technical solution, the load sensor can detect the magnitude of the tension applied to the connecting component in real time. During the arrester tension test, this allows the operator to accurately understand the tension value currently applied to the arrester, thereby better controlling the test process. The load sensor can set the maximum tension value. When the tension exceeds the set value, the system can automatically stop the test, thereby preventing damage to the arrester and test equipment due to excessive tension.

[0024] Furthermore, the measuring component includes a servo electric cylinder and a transmission mechanism that converts the rotational motion of the servo electric cylinder into linear motion and an electric cylinder encoder that records the moving distance of the moving end of the servo electric cylinder. The rotating end of the servo electric cylinder is connected to the input end of the transmission mechanism, and the measuring surface is in the moving path of the moving end of the transmission mechanism.

[0025] By adopting the above-mentioned technical solution, the electric cylinder encoder can accurately record the moving distance of the moving end of the servo electric cylinder and provide accurate data for measurement. The electric cylinder encoder and the servo electric cylinder can be integrated with the control system to realize automated measurement and control. By programming and controlling the movement of the servo electric cylinder and reading the data of the electric cylinder encoder, the automated operation of the arrester tensile test can be realized, thereby improving the test efficiency and accuracy.

[0026] Furthermore, the telescopic driving mechanism and the bracket are slidably connected. After the telescopic driving mechanism moves to a specified position, the telescopic driving mechanism and the bracket can be fixed by a connecting fixing piece.

[0027] By adopting the above-mentioned technical solution, the telescopic drive mechanism is slidably connected to the bracket, so that its position can be flexibly adjusted according to the different sizes of lightning arresters. Through the cooperation of the sliding connection and the fixing parts, the position of the telescopic drive mechanism can be accurately adjusted to ensure that the direction of the pulling force coincides with the axis of the lightning arrester as much as possible; and the lightning arrester may be installed on the power equipment at different angles. The telescopic drive mechanism of the sliding connection can be adjusted according to the installation angle of the lightning arrester to ensure that the direction of the pulling force is consistent with the actual force direction after installation, which helps to more accurately evaluate the performance of the lightning arrester under different installation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present application is further described below in conjunction with the accompanying drawings: Figure 1 A schematic diagram of a lightning arrester measuring tool for this application; Figure 2 This is a cross-sectional view of the card holder.

[0029] Description of the drawings: 1. Test mounting frame; 2. Fixture assembly; 21. Test seat assembly; 211. Chassis; 212. Base; 22. Card holder; 221. Card slot; 3. Connection assembly; 31. Connector; 32. Transmission member; 4. Telescopic drive mechanism; 5. Measuring assembly; 6. Test object; 7. Load sensor; 8. Measuring surface; 9. Elastic member; 10. Fixing member; 101. Adjusting member. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0031] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that it has "first". It should be understood that in this application, "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. It should be understood that in this application, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0032] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0033] like Figure 1 to Figure 2 As shown, the present application provides a lightning arrester measurement tooling, including a test mounting frame 1, to which a fixture assembly 2 for clamping one end of a test object 6 is fixedly connected, and a tension detection component is provided on the test mounting frame 1 on one side of the fixture assembly, and the tension detection component is connected to the other end of the test object 6, and the fixture assembly 2 includes a test seat assembly 21 fixedly connected to the test mounting frame 1, and two symmetrically arranged sockets 22 are slidably connected to the test seat assembly 21.

[0034] After adopting the above technical scheme, the specific testing process is as follows: first, the sockets 22 in the clamp assembly 2 are moved away from each other and opened to enlarge the clamping space between the sockets 22, and then the product to be tested 6, that is, one end of the arrester, is placed in the clamping space, and then the clamping space between the sockets 22 is reduced, so that one end of the product to be tested 6 is clamped by the socket 22, and the other end is connected to the tension detection component. After the connection, the tension detection component performs a tension test on the product to be tested 6. After the test is completed, the sockets 22 are moved away from each other to expand the clamping space, and then other arresters of different specifications and thicknesses are tested. By analogy, the tension residual deformation values ​​of various arresters can be measured. The present application has the following advantages: one end of the lightning arrester is clamped and fixed by the clamp assembly 2, and the clamping parts in the clamp assembly 2 can be moved away from each other to achieve a larger clamping space, thereby clamping a larger test object 6, which helps the measuring tool to adapt to lightning arresters of more coarse and fine sizes. This new type of lightning arrester testing tool can be used for lightning arresters of different specifications, and the tooling adjustment is faster and more convenient.

[0035] It can be understood that the symmetrically arranged sockets 22 of the test socket assembly 21 can also be set to a detachable connection, so that the clamp can be adjusted according to the different sizes of the lightning arrester. For lightning arresters with larger or smaller diameters, sockets 22 of different specifications can be replaced to ensure that the clamp can firmly clamp the lightning arrester. During long-term use, the clamp assembly 2 may be worn or damaged. The design of the detachable socket 22 makes it easy to replace the socket 22 when it is damaged without replacing the entire clamp assembly 2. This not only reduces maintenance costs, but also reduces maintenance time and improves production efficiency. Since the socket 22 is detachably connected, when installing the lightning arrester, the size of the clamp can be quickly adjusted according to the size of the lightning arrester, which reduces installation time and improves work efficiency.

[0036] Furthermore, after the holder 22 moves to the designated position, the test holder assembly 21 is fixedly connected to the holder 22 via the fixing member 10 .

[0037] By adopting the above technical solution, the holder 22 can be fixed at a suitable position through the fixing member 10, ensuring that the clamping force of the holder 22 on the measured product 6 does not change significantly.

[0039] Furthermore, the holder 22 includes a connection portion installed with the test holder assembly 21 , and an elastic member 9 for pushing the two holders 22 away from each other is provided between the connection portion and the test holder assembly 21 . The two holders 22 are pushed closer to each other by the adjusting member 101 .

[0040] With the above technical solution, the setting of the elastic member 9 enables the holder 22 to automatically spring open a certain distance during installation, which facilitates the placement of the arrester. The operator can easily put the arrester into the fixture assembly 2, and then move the holder 22 close to the base 212 through the adjustment member 101 to achieve quick installation. The adjustment member 101 can accurately adjust the position of the holder 22 to further adapt to arresters of different sizes. The operator can move the holder 22 to a suitable position through the adjustment member 101 according to the actual size of the arrester to ensure the firmness and stability of the clamping.

[0041] Furthermore, the base 212 and the card holder 22 are detachably connected, and a card slot 221 is provided on the facing surface between the two card holders 22 .

[0042] By adopting the above-mentioned technical solution, the setting of the slot 221 provides a specific placement position for the lightning arrester, so that the lightning arrester can be clamped more firmly between the two sockets 22. The slot 221 can match the shape of the lightning arrester to increase the contact area, thereby improving the clamping stability. By designing slots 221 of different sizes, it can adapt to lightning arresters of different diameters or shapes.

[0043] Furthermore, the test seat assembly 21 includes a chassis 211 fixed to the test mounting frame 1, and a base 212 is rotatably connected to the chassis 211. After the chassis 211 is rotated to a specified position, the base 212 and the chassis 211 can be circumferentially fixed at this position by connecting a fixing member 10.

[0044] By adopting the above-mentioned technical solution, the lightning arrester can be subjected to multi-angle tensile testing by rotating the connected base 212, so as to have a more comprehensive understanding of the stress conditions of the lightning arrester at different angles, thereby more accurately evaluating the reliability and stability of its structure. The data obtained from the multi-angle test can provide an important basis for the design of the lightning arrester. The designer can optimize the structural design of the lightning arrester according to the test results at different angles so that it can maintain good performance under various stress conditions. The multi-angle test is closer to the stress conditions of the lightning arrester in actual use, so the accuracy and reliability of the test can be improved. Compared with the single-angle test, the multi-angle test can more truly reflect the performance of the lightning arrester in actual work and provide a stronger guarantee for product quality.

[0038] Specifically, the test socket assembly 21 has a plurality of fixing positions, and the fixing member can fix the chassis 211 at a selected fixing position of the test socket assembly 21 .

[0045] Furthermore, the tension detection component includes a bracket, to which is connected a telescopic drive mechanism 4, the telescopic drive mechanism 4 is divided into a mobile end and a fixed end, the fixed end is provided with a telescopic measuring component 5, the mobile end is connected with a connecting component 3 for connecting to the other end of the measured object 6, and the connecting component 3 is provided with a measuring surface 8 located on the telescopic path of the measuring component 5.

[0046] By adopting the above technical solution, after the two ends of the arrester are connected to the test fixture, the measuring assembly 5 is first moved to the measuring surface 8, and the distance value of the measuring assembly 5 moving to the measuring surface 8 before the test is measured, and then the telescopic drive mechanism 4 is started and the connecting assembly 3 is pulled, and the connecting assembly 3 is driven to pull the arrester under test, and the tension gradually relaxes after reaching the test value until the tension is unloaded, and the measuring assembly 5 is moved to the measuring surface 8 again, and the distance value of the measuring assembly 5 moving to the measuring surface 8 after the test is measured, and then the tension of the arrester under test is evaluated. The connection between the other end of the arrester and the connecting assembly 3 can be in the form of a hinge, so that the arrester can effectively reduce stress concentration when performing a tensile test, and the installation between the connecting assembly 3 and the arrester is also simpler, and can be installed and connected by bolts, so that the tensile test is more accurate.

[0047] It can be understood that the connection between the connecting component 3 and the product under test can be a sliding connection, which can also help to disperse the stress at the connection and ensure the accuracy of the test.

[0048] Furthermore, the connecting component 3 includes a connecting member 31 and a transmission member 32, one end of the transmission member 32 is fixedly connected to the telescopic driving mechanism 4, the other end of the transmission member 32 is hinged to one end of the connecting member 31, and the connecting member 31 is hinged to the other end of the test object 6.

[0049] Using the aforementioned technical solution, the transmission member 32 is fixedly connected to the telescopic drive mechanism 4, and the other end is hinged to the connecting member 31. This structure enables the connecting component 3 to rotate freely within a certain range, so as to better adapt to the installation requirements of the lightning arrester at different angles and positions. The hinged connection method can effectively reduce stress concentration, and can also adjust the force angle in the tensile test to improve the service life and reliability of the connecting component 3. When the tensile force acts on the connecting component 3, the hinge can disperse the stress to avoid damage to the connecting components due to excessive local stress. During testing, the connecting member 31 and the lightning arrester can be quickly disassembled and assembled.

[0050] Furthermore, a load sensor 7 for detecting the magnitude of the pulling force is provided between the connecting assembly 3 and the telescopic driving mechanism 4 .

[0051] By adopting the above-mentioned technical solution, the load sensor 7 can detect the magnitude of the tension applied to the connecting component 3 in real time. During the arrester tension test, this allows the operator to accurately understand the tension value currently applied to the arrester, thereby better controlling the test process. The load sensor 7 can set the maximum tension value. When the tension exceeds the set value, the system can automatically stop the test, thereby preventing damage to the arrester and test equipment due to excessive tension.

[0052] Furthermore, the measuring component 5 includes a servo electric cylinder and a transmission mechanism that converts the rotational motion of the servo electric cylinder into linear motion and an electric cylinder encoder that records the moving distance of the moving end of the servo electric cylinder. The rotating end of the servo electric cylinder is connected to the input end of the transmission mechanism, and the measuring surface 8 is in the moving path of the moving end of the transmission mechanism.

[0053] By adopting the above-mentioned technical solution, the electric cylinder encoder can accurately record the moving distance of the moving end of the servo electric cylinder and provide accurate data for measurement. The electric cylinder encoder and the servo electric cylinder can be integrated with the control system to realize automated measurement and control. By programming and controlling the movement of the servo electric cylinder and reading the data of the electric cylinder encoder, the automated operation of the arrester tensile test can be realized, thereby improving the test efficiency and accuracy.

[0054] Furthermore, the telescopic driving mechanism 4 is slidably connected to the bracket. After the telescopic driving mechanism 4 moves to a specified position, the telescopic driving mechanism 4 and the bracket can be fixed by a connecting fixing member 10 .

[0055] By adopting the above-mentioned technical solution, the telescopic drive mechanism 4 is slidably connected to the bracket, so that its position can be flexibly adjusted according to the different sizes of lightning arresters. Through the cooperation of the sliding connection and the fixing part 10, the position of the telescopic drive mechanism 4 can be accurately adjusted to ensure that the direction of the pulling force coincides with the axis of the lightning arrester as much as possible; and the lightning arrester may be installed on the power equipment at different angles. The slidably connected telescopic drive mechanism 4 can be adjusted according to the installation angle of the lightning arrester to ensure that the direction of the pulling force is consistent with the actual force direction after installation, which helps to more accurately evaluate the performance of the lightning arrester under different installation conditions.

[0056] Furthermore, the fixing member 10 is a fastening bolt, and the adjusting member 101 is an adjusting bolt.

[0057] In addition to the above-mentioned preferred embodiments, the present application also has other implementation modes. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present application.

Claims

1. A lightning arrester measuring tool, comprising a test mounting frame (1), to which a fixture assembly (2) for clamping one end of a measured product (6) is fixedly connected, and a tension detection component is provided on the test mounting frame (1) on one side of the fixture assembly, and the tension detection component is connected to the other end of the measured product (6), characterized in that: The fixture assembly (2) comprises a test seat assembly (21) fixedly connected to the test mounting frame (1), and two symmetrically arranged clamping seats (22) are slidably connected to the test seat assembly (21).

2. The arrester measuring tool according to claim 1, characterized in that: After the card holder (22) moves to a designated position, the test holder assembly (21) is fixedly connected to the card holder (22) via a fixing member (10).

3. The arrester measuring tool according to claim 1, characterized in that: The card seat (22) comprises a connecting portion mounted on the test seat assembly (21), an elastic member (9) for pushing the two card seats (22) away from each other is provided between the connecting portion and the test seat assembly (21), and the two card seats (22) are pushed closer to each other by an adjusting member (101).

4. The arrester measuring tool according to claim 1, characterized in that: A card slot (221) is provided on the facing surface between the two card seats (22).

5. The arrester measuring tool according to claim 1, characterized in that: The test seat assembly comprises a chassis (211) fixed to a test mounting frame (1); a base (212) is rotatably connected to the chassis (211); the holder (22) is slidably connected to the base (212); after the chassis (211) is rotated to a specified position, the base (212) and the chassis (211) can be circumferentially fixed by a connecting fixture (10).

6. The arrester measuring tool according to claim 1, characterized in that: The tension detection component comprises a bracket, the bracket is connected to a telescopic drive mechanism (4), the telescopic drive mechanism (4) is divided into a mobile end and a fixed end, the fixed end is provided with a telescopic measuring component (5), the mobile end is connected to a connecting component (3) for connecting to the other end of a measured object (6), and the connecting component (3) is provided with a measuring surface (8) located on the telescopic path of the measuring component (5).

7. The arrester measuring tool according to claim 6, characterized in that: The connecting assembly (3) comprises a connecting member (31) and a transmission member (32), one end of the transmission member (32) is fixedly connected to the telescopic drive mechanism (4), the other end of the transmission member (32) is hinged to one end of the connecting member (31), and the connecting member (31) is hinged to the other end of the object to be tested (6).

8. The arrester measuring tool according to claim 6, characterized in that: A load sensor (7) for detecting the magnitude of the pulling force is also provided between the connecting assembly (3) and the telescopic driving mechanism (4).

9. The arrester measuring tool according to claim 6, characterized in that: The measuring assembly (5) comprises a servo electric cylinder, a transmission mechanism for converting the rotational motion of the servo electric cylinder into linear motion, and an electric cylinder encoder for recording the moving distance of the moving end of the servo electric cylinder. The rotating end of the servo electric cylinder is connected to the input end of the transmission mechanism, and the measuring surface (8) is located in the moving path of the moving end of the transmission mechanism.

10. The arrester measuring tool according to claim 6, characterized in that: The telescopic drive mechanism (4) and the bracket are slidably connected so as to slide up and down relative to the test mounting frame (1); after the telescopic drive mechanism (4) moves to a specified position, the telescopic drive mechanism (4) and the bracket can be fixed by a connecting fixture (10).

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