Polishing, clamping and testing device and method for high-altitude wiring board of circuit breaker

Abstract

The invention discloses a circuit breaker high-altitude wiring board polishing, clamping and testing device, which comprises a mounting frame connected with an insulating operating rod, and a fixed clamping plate and a movable clamping plate which are oppositely arranged on the mounting frame up and down, and a clamping space for clamping a circuit breaker high-altitude wiring board is formed between the movable clamping plate and the fixed clamping plate. A transmission mechanism is arranged on the mounting frame, an annular grinding piece and a rotary driving mechanism are arranged on the movable clamping plate, the top of the annular grinding piece is located in the clamping space, and a stop block extending into the clamping space is arranged on the fixed clamping plate and used for stopping the end, extending into the clamping space, of the high-altitude wiring board of the circuit breaker. And the annular polishing piece is connected with a loop resistance test leading-out wire. The invention also discloses a circuit breaker high-altitude wiring board polishing and clamping test method. The grinding, clamping and testing device and method for the high-altitude wiring board of the circuit breaker are high in grinding effect, efficiency and adaptability, operation is easier, unsuccessful grinding is not likely to be caused, and the efficient grinding requirement is met.

Description

Technical Field

[0001] This invention relates to the field of power testing technology, specifically to a device and method for testing the grinding and clamping of circuit breaker high-altitude terminal blocks. Background Technology

[0002] High-voltage circuit breaker circuit resistance measurement is an important routine test item during circuit breaker outage maintenance and is the "gold standard" for verifying internal contact conditions. When measuring circuit breaker circuit resistance on-site, operators typically use overhead wiring clamps to clamp the upper and lower terminal blocks of the circuit breaker. However, due to environmental factors and long operating time, dirt and oxide layers accumulate on the surface of the circuit breaker terminal blocks. Using overhead wiring clamps for circuit resistance measurement often leads to overestimation or unacceptable results. Therefore, it is necessary to grind and remove rust from the terminal blocks to ensure that the test results accurately reflect the internal contact conditions of the circuit breaker. The terminal blocks of high-voltage circuit breakers are located high off the ground. The upper terminal block of a 220kV high-voltage circuit breaker is approximately 7 meters above the ground, 110kV is approximately 5.5 meters, and 35kV is approximately 3.0 meters. Currently, when circuit resistance measurements fail, workers typically use two methods to grind and remove rust from the terminal blocks: 1. Personnel climb an insulated A-frame ladder to the terminal block and manually grind and wipe it with a grinder. However, repeatedly moving the ladder is tedious and time-consuming, and there are safety risks associated with climbing up and down the ladder and working on it. Furthermore, due to the maximum height limit of the insulated A-frame ladder, the terminal blocks on the 220kV circuit breaker are often inaccessible to personnel. 2. Personnel use an aerial work platform to reach the terminal block and manually grind and wipe it with a grinder. This method is inefficient and increases maintenance costs. Additionally, the aerial work platform is often unusable due to its proximity to live parts or limited space.

[0003] Chinese patent document with application number 201610158624.5 discloses a grinding and wiring device for loop resistance testing. It includes a frame, on which a first mounting plate and a second mounting plate are slidably mounted. A first wire brush is connected to the first mounting plate, and a second wire brush is connected to the second mounting plate. The first and second wire brushes are driven to reciprocate by a crank-slider mechanism consisting of a slider, a rocker arm, and a rotating wheel. The rotating wheel is connected to a first synchronous pulley, which is connected to a second synchronous pulley by a synchronous belt. A hand crank is provided on the second synchronous pulley. When the wheel frame moves within the high stroke range, the first and second wire brushes are clamped onto the surface of the first test terminal block. The first and second wire brushes respectively polish the rusted or oxidized surfaces of the first test terminal block. However, on the one hand, the clamping force is difficult to adjust during the polishing process, making it difficult to clean the dirt and oxide layer on the circuit breaker terminal block surface, resulting in poor polishing effect. On the other hand, the wire brushes deform under the influence of the clamping force during use, leading to poor durability and affecting work efficiency. Furthermore, the reaction force of the polishing movement of the first and second wire brushes on the surface of the first test terminal block needs to be provided by a handheld insulating rod. This means that the relative movement of the first and second wire brushes with the first test terminal block needs to be achieved through the insulating rod, which is not only difficult to operate but also prone to causing unsuccessful polishing and failing to meet the polishing requirements. Finally, after polishing the terminal block using the first and second wire brushes, the wire brushes no longer have testing capabilities. It is necessary to change the testing equipment and re-clamp the circuit resistance test. This can easily lead to the test position being different from the polished position, resulting in the test result still being too high. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a grinding clamping test device and method for circuit breaker high-altitude terminal blocks that improves grinding effect, efficiency and adaptability, is easier to operate and less likely to cause grinding test failure, and achieves the requirements of high-efficiency grinding.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A grinding and clamping test device for a circuit breaker high-altitude terminal block includes a mounting frame connected to an insulating operating rod, and a fixed clamping plate and a movable clamping plate arranged opposite each other on the mounting frame. The movable clamping plate and the fixed clamping plate form a clamping space for holding the circuit breaker high-altitude terminal block. The mounting frame is equipped with a transmission mechanism for moving the movable clamping plate to adjust the opening of the clamping space. The movable clamping plate is equipped with an annular grinding element and a rotary drive mechanism for driving the annular grinding element to rotate. The top of the annular grinding element is located within the clamping space and is used to cooperate with the fixed clamping plate to clamp the circuit breaker high-altitude terminal block. The fixed clamping plate is equipped with a blocking block extending into the clamping space to block one end of the circuit breaker high-altitude terminal block extending into the clamping space. The annular grinding element is connected to a loop resistance test lead.

[0006] As a further improvement to the above technical solution: The rotary drive mechanism includes a driving wheel, a driven wheel, and a drive motor. The driving wheel and the driven wheel are both mounted on a movable clamping plate. The annular grinding element is wound around the driving wheel and the driven wheel. The drive motor is connected to the driving wheel.

[0007] The movable clamping plate is equipped with a clamping wheel, which is located inside the annular grinding part and presses the top of the annular grinding part against the clamping space.

[0008] The movable clamp has an internal mounting cavity, and the driving wheel, driven wheel, clamping wheel and drive motor are all located inside the mounting cavity.

[0009] The top surface of the movable clamping plate is located at the mounting port that communicates with the mounting cavity, and the top of the annular grinding part extends into the clamping space through the mounting port.

[0010] The annular grinding component is a grinding chain, and both the driving wheel and the driven wheel are sprockets.

[0011] The mounting bracket includes a hollow column and a guide channel that extends radially and axially along the hollow column. One end of the fixed clamp is fixed to the top of the hollow column, and one end of the movable clamp slides in the guide channel. The bottom of the hollow column is provided with a docking part for connecting with the insulating operating rod.

[0012] The transmission mechanism includes a fixed pulley, a rope winding component, and a pull rope wound around the fixed pulley. One end of the pull rope is connected to a movable clamping plate, and the other end is connected to the rope winding component.

[0013] The rope winding component is an electric reel mounted on a hollow column, or a manual or electric reel located at the bottom of an insulated operating rod.

[0014] A method for testing the grinding and clamping of a circuit breaker high-altitude terminal block, using the aforementioned testing device, includes the following steps: S1. Connect the mounting bracket to the insulating operating rod, and extend the movable clamp and the fixed clamp to the high-altitude terminal block of the circuit breaker through the insulating operating rod, so that the high-altitude terminal block of the circuit breaker extends into the clamping space. S2. The movable clamping plate is moved upward through the transmission mechanism until the circuit breaker high-altitude terminal block is clamped between the annular grinding part and the fixed clamping plate, and the end of the circuit breaker high-altitude terminal block extending into the clamping space abuts against the blocking block. S3. Drive the annular grinding part to rotate towards the blocking block through the rotary drive mechanism to grind the lower surface of the circuit breaker high-altitude terminal block; S4. Use a loop resistance tester to connect the loop resistance test lead for testing.

[0015] Compared with the prior art, the advantages of the present invention are as follows: The present invention relates to a grinding and clamping testing device for high-altitude circuit breaker terminal blocks. Firstly, during the grinding process of the annular grinding component and the fixed clamping plate clamping the high-altitude circuit breaker terminal block, the clamping force between the annular grinding component and the fixed clamping plate can be adjusted via a transmission mechanism. For example, to address difficult-to-treat dirt and oxide layers, the clamping force can be increased for grinding, improving the grinding effect, efficiency, and adaptability. Secondly, the reaction force of the grinding movement of the annular grinding component and the fixed clamping plate clamping the high-altitude circuit breaker terminal block is provided by the blocking block and the annular grinding component. The reaction force is canceled out internally by the device and does not require an insulating operating rod, making operation easier and reducing the likelihood of grinding and testing failures. The system achieves several advantages: First, it meets the requirements for high-efficiency grinding. Second, the annular grinding component is connected to the loop resistance test lead, allowing it to function as a contact for the circuit breaker terminal block during loop resistance testing. The grinding position is the same as the test position, enabling rapid grinding, stopping, and testing of the circuit breaker terminal block. Third, the counter-clockwise rotation of the annular grinding component grinds the terminal block, preventing deformation due to clamping force. The annular grinding component serves as both a grinding component and a loop resistance test clamping component. Furthermore, the rotary grinding method removes the grinding material during the grinding process, integrating the grinding and cleaning of the surface. Fourth, it improves overall testing efficiency.

[0016] The present invention discloses a method for grinding and clamping a circuit breaker overhead terminal block. Firstly, during the grinding process of the annular grinding component and the fixed clamping plate clamping the circuit breaker overhead terminal block, the clamping force between the annular grinding component and the fixed clamping plate can be adjusted via a transmission mechanism. For example, to address stubborn dirt and oxide layers, the clamping force can be increased for grinding, improving the grinding effect, efficiency, and adaptability. Secondly, the reaction force of the grinding movement of the annular grinding component and the fixed clamping plate clamping the circuit breaker overhead terminal block is provided by the blocking block and the annular grinding component. The reaction force is canceled out internally by the device and does not require an insulating operating rod, making operation easier and reducing the likelihood of grinding and testing failures. The system achieves several advantages: First, it meets the requirements for high-efficiency grinding. Second, the annular grinding component is connected to the loop resistance test lead, allowing it to function as a contact for the circuit breaker terminal block during loop resistance testing. The grinding position is the same as the test position, enabling rapid grinding, stopping, and testing of the circuit breaker terminal block. Third, the counter-clockwise rotation of the annular grinding component grinds the terminal block, preventing deformation due to clamping force. The annular grinding component serves as both a grinding component and a loop resistance test clamping component. Furthermore, the rotary grinding method removes the grinding material during the grinding process, integrating the grinding and cleaning of the surface. Fourth, it improves overall testing efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the circuit breaker high-altitude terminal block grinding and clamping test device of the present invention.

[0018] Figure 2 This is a schematic diagram of the main structure of the circuit breaker high-altitude terminal block grinding and clamping test device of the present invention.

[0019] Figure 3 This is a schematic diagram of the main cross-section of the circuit breaker high-altitude terminal block grinding and clamping test device of the present invention.

[0020] Figure 4 This is a partial structural schematic diagram of the insulating operating rod of the circuit breaker high-altitude terminal block grinding and clamping test device of the present invention.

[0021] The labels in the diagram represent: 1. Mounting bracket; 11. Hollow column; 12. Guide channel; 13. Connecting part; 2. Fixed clamping plate; 21. Blocking block; 3. Movable clamping plate; 31. Mounting cavity; 32. Mounting port; 4. Circuit breaker high-altitude terminal block; 5. Clamping space; 6. Transmission mechanism; 61. Fixed pulley; 62. Rope winding component; 63. Pull rope; 7. Annular grinding component; 8. Rotary drive mechanism; 81. Driving wheel; 82. Driven wheel; 83. Pressing wheel; 9. Insulated operating rod. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Figures 1 to 4 This invention illustrates an embodiment of the circuit breaker high-altitude terminal block grinding and clamping test device. The device includes a mounting frame 1 connected to an insulating operating rod 9, and a fixed clamping plate 2 and a movable clamping plate 3 arranged vertically opposite to each other on the mounting frame 1. A clamping space 5 is formed between the movable clamping plate 3 and the fixed clamping plate 2 for clamping the circuit breaker high-altitude terminal block 4. The mounting frame 1 is equipped with a transmission mechanism 6 for moving the movable clamping plate 3 to adjust the opening of the clamping space 5. The movable clamping plate 3 is equipped with an annular grinding element 7 and a rotation drive mechanism 8 for driving the annular grinding element 7 to rotate. The top of the annular grinding element 7 is located within the clamping space 5 and is used to cooperate with the fixed clamping plate 2 to clamp the circuit breaker high-altitude terminal block 4. The fixed clamping plate 2 is equipped with a blocking block 21 extending into the clamping space 5 to block one end of the circuit breaker high-altitude terminal block 4 extending into the clamping space 5. The annular grinding element 7 is connected to a loop resistance test lead.

[0027] The operation process of this circuit breaker high-altitude terminal block grinding and clamping test device is as follows: First, connect the mounting bracket 1 to the insulating operating rod 9, and extend the movable clamping plate 3 and the fixed clamping plate 2 to the circuit breaker high-altitude terminal block 4 through the insulating operating rod 9, so that the circuit breaker high-altitude terminal block 4 extends into the clamping space 5; Second, move the movable clamping plate 3 upward through the transmission mechanism 6, so that the circuit breaker high-altitude terminal block 4 is clamped between the annular grinding part 7 and the fixed clamping plate 2, and make the end of the circuit breaker high-altitude terminal block 4 extending into the clamping space 5 abut against the blocking block 21; Third, drive the annular grinding part 7 to rotate towards the blocking block 21 through the rotation drive mechanism 8 to grind the lower surface of the circuit breaker high-altitude terminal block 4; Fourth, use a loop resistance tester to connect the loop resistance test lead for testing.

[0028] This high-altitude terminal block grinding and clamping test device for circuit breakers has two main aspects. First, during the grinding process of the annular grinding component 7 and the fixed clamping plate 2 clamping the high-altitude terminal block 4 of the circuit breaker, the clamping force between the annular grinding component 7 and the fixed clamping plate 2 can be adjusted via the transmission mechanism 6. For example, to address difficult-to-treat dirt and oxide layers, the clamping force can be increased for grinding, improving the grinding effect, efficiency, and adaptability. Second, the reaction force of the grinding movement of the annular grinding component 7 and the fixed clamping plate 2 clamping the high-altitude terminal block 4 is provided by the blocking block 21 and the annular grinding component 7. The reaction force is canceled out internally by the device and does not need to be provided by the insulating operating rod 9. This not only makes the operation easier but also reduces the risk of grinding and testing errors. Successfully achieving the high-efficiency grinding requirements; thirdly, the annular grinding component 7 is connected to the loop resistance test lead, and the annular grinding component 7 can also serve as the contact component of the circuit breaker terminal block for loop resistance testing. The grinding position is the test position, which can quickly realize the circuit breaker terminal block grinding, stopping and testing immediately; fourthly, by grinding the terminal block counterclockwise with the annular grinding component 7, the annular grinding component 7 is not affected by the clamping force and will not deform during the grinding process. The annular grinding component 7 is not only a grinding component but also a loop resistance test clamping component. At the same time, the rotary grinding method can carry away the grinding material during the grinding process, realizing the integration of grinding and cleaning of the surface; fifthly, the overall testing efficiency is improved.

[0029] Furthermore, such as Figure 3 As shown, in this embodiment, the rotary drive mechanism 8 includes a driving wheel 81, a driven wheel 82, and a drive motor. Both the driving wheel 81 and the driven wheel 82 are mounted on the movable clamping plate 3. The annular grinding element 7 is wound around the driving wheel 81 and the driven wheel 82. The drive motor is connected to the driving wheel 81. The drive motor drives the driving wheel 81 to rotate, thereby causing the annular grinding element 7 to rotate. Preferably, the central axes of the driving wheel 81 and the driven wheel 82 are parallel and both are located on a plane parallel to the fixed clamping plate 2.

[0030] Furthermore, in this embodiment, the movable clamping plate 3 is provided with a clamping wheel 83. The clamping wheel 83 is located inside the annular grinding member 7 and presses the top of the annular grinding member 7 against the clamping space 5, which helps to ensure the clamping effect between the annular grinding member 7 and the circuit breaker high-altitude terminal block 4, thereby improving the grinding effect. One clamping wheel 83 can be provided, or multiple wheels can be provided according to actual needs.

[0031] Furthermore, in this embodiment, the movable clamping plate 3 has an installation cavity 31 inside, and the driving wheel 81, driven wheel 82, clamping wheel 83 and drive motor are all located inside the installation cavity 31, reducing exposure and improving aesthetics, while also providing protection for the installation cavity 31, driving wheel 81, driven wheel 82, clamping wheel 83 and drive motor.

[0032] Furthermore, in this embodiment, the top surface of the movable clamping plate 3 is provided at the mounting port 32 which communicates with the mounting cavity 31, and the top of the annular grinding member 7 extends into the clamping space 5 through the mounting port 32.

[0033] Furthermore, in this embodiment, the annular grinding component 7 is a grinding chain, and both the driving wheel 81 and the driven wheel 82 are sprockets. The clamping wheel 83 is also a sprocket.

[0034] Furthermore, in this embodiment, the mounting frame 1 includes a hollow column 11 and a guide channel 12 that extends radially and axially along the hollow column 11. One end of the fixed clamping plate 2 is fixed to the top of the hollow column 11, and one end of the movable clamping plate 3 is slidably disposed within the guide channel 12. The bottom of the hollow column 11 is provided with a docking part 13 for connecting with the insulating operating rod 9. The movable clamping plate 3 slides along the guide channel 12, moving closer to and further away from the fixed clamping plate 2 to adjust the opening of the clamping space 5.

[0035] Further, in this embodiment, the transmission mechanism 6 includes a fixed pulley 61, a rope winding component 62, and a pull rope 63 wound around the fixed pulley 61. One end of the pull rope 63 is connected to the movable clamping plate 3, and the other end is connected to the rope winding component 62. The rope winding component 62 winds up the pull rope 63, causing the movable clamping plate 3 to slide upward along the guide channel 12 to approach the fixed clamping plate 2, thereby achieving the clamping of the circuit breaker high-altitude terminal block 4 between the annular grinding component 7 and the fixed clamping plate 2. The rope winding component 62 can adjust the winding force to adjust the clamping force of the annular grinding component 7 and the fixed clamping plate 2 on the circuit breaker high-altitude terminal block 4. The rope winding component 62 releases the pull rope 63, and the movable clamping plate 3 slides downward along the guide channel 12 under the action of gravity to move away from the fixed clamping plate 2, thereby achieving the release of the circuit breaker high-altitude terminal block 4 between the annular grinding component 7 and the fixed clamping plate 2.

[0036] Furthermore, in this embodiment, the rope winding component 62 is an electric reel mounted on the hollow column 11, or it is a manual or electric reel located below the insulating operating rod 9. Both the manual and electric reels are existing components. If the rope winding component 62 is an electric reel mounted on the hollow column 11, it can be controlled by a remote control. If the rope winding component 62 is a manual or electric reel located below the insulating operating rod 9, it can be operated manually while standing on the ground.

[0037] Example 2: A method for testing the grinding and clamping of a circuit breaker high-altitude terminal block, using the testing device for grinding and clamping of a circuit breaker high-altitude terminal block as described in Embodiment 1, includes the following steps: S1. Connect the mounting bracket 1 to the insulating operating rod 9, and extend the movable clamping plate 3 and the fixed clamping plate 2 to the circuit breaker high-altitude terminal block 4 through the insulating operating rod 9, so that the circuit breaker high-altitude terminal block 4 extends into the clamping space 5. S2. The movable clamping plate 3 is moved upward by the transmission mechanism 6 until the circuit breaker high-altitude terminal block 4 is clamped between the annular grinding piece 7 and the fixed clamping plate 2, and the end of the circuit breaker high-altitude terminal block 4 extending into the clamping space 5 abuts against the blocking block 21. S3. Drive the annular grinding piece 7 to rotate towards the blocking block 21 through the rotary drive mechanism 8 to grind the lower surface of the circuit breaker high-altitude terminal block 4. S4. Use a loop resistance tester to connect the loop resistance test lead for testing.

[0038] This method for grinding and clamping test of the high-altitude terminal block of the circuit breaker has two aspects. First, during the grinding process of the annular grinding component 7 and the fixed clamping plate 2 clamping the high-altitude terminal block 4 of the circuit breaker, the clamping force between the annular grinding component 7 and the fixed clamping plate 2 can be adjusted through the transmission mechanism 6. For example, for difficult-to-treat dirt and oxide layers, the clamping force can be increased to improve the grinding effect, efficiency, and adaptability. Second, the reaction force of the grinding movement of the annular grinding component 7 and the fixed clamping plate 2 clamping the high-altitude terminal block 4 is provided by the blocking block 21 and the annular grinding component 7. The reaction force is canceled out inside the device and does not need to be provided by the insulating operating rod 9. This not only makes the operation easier but also reduces the likelihood of grinding and testing failures, achieving high efficiency. The grinding requirements are met, and the overall testing efficiency is improved. Thirdly, the annular grinding part 7 is connected to the loop resistance test lead, and the annular grinding part 7 can also serve as the contact part of the circuit breaker terminal block for loop resistance testing. The grinding position is the test position, which can quickly realize the circuit breaker terminal block grinding, stopping and testing immediately. Fourthly, by grinding the terminal block counterclockwise with the annular grinding part 7, the annular grinding part 7 is not affected by the clamping force and will not deform during the grinding process. The annular grinding part 7 is not only a grinding part but also a loop resistance test clamping part. At the same time, the rotary grinding method can take away the grinding material during the grinding process, realizing the integration of grinding surface and cleaning surface. Fifthly, the overall testing efficiency is improved.

[0039] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A device for grinding and clamping a circuit breaker high-altitude terminal block, comprising a mounting frame (1) connected to an insulating operating rod (9), and a fixed clamping plate (2) and a movable clamping plate (3) arranged vertically opposite to each other on the mounting frame (1), wherein a clamping space (5) for clamping a circuit breaker high-altitude terminal block (4) is formed between the movable clamping plate (3) and the fixed clamping plate (2), and the mounting frame (1) is provided with a transmission mechanism (6) for driving the movable clamping plate (3) to move to adjust the opening of the clamping space (5), characterized in that: The movable clamping plate (3) is provided with an annular grinding part (7) and a rotary drive mechanism (8) for driving the annular grinding part (7) to rotate. The top of the annular grinding part (7) is located in the clamping space (5) and is used to cooperate with the fixed clamping plate (2) to clamp the circuit breaker high-altitude terminal block (4). The fixed clamping plate (2) is provided with a blocking block (21) extending into the clamping space (5) to block one end of the circuit breaker high-altitude terminal block (4) extending into the clamping space (5). The annular grinding part (7) is connected to a loop resistance test lead.

2. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 1, characterized in that: The rotary drive mechanism (8) includes a drive wheel (81), a driven wheel (82) and a drive motor. The drive wheel (81) and the driven wheel (82) are both mounted on the movable clamping plate (3). The annular grinding component (7) is wound around the drive wheel (81) and the driven wheel (82). The drive motor is connected to the drive wheel (81).

3. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 2, characterized in that: The movable clamping plate (3) is provided with a clamping wheel (83), which is located inside the annular grinding part (7) and presses the top of the annular grinding part (7) against the clamping space (5).

4. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 3, characterized in that: The movable clamp (3) has an installation cavity (31) inside, and the driving wheel (81), driven wheel (82), clamping wheel (83) and drive motor are all located in the installation cavity (31).

5. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 4, characterized in that: The top surface of the movable clamping plate (3) is located at the mounting port (32) which communicates with the mounting cavity (31), and the top of the annular grinding part (7) extends into the clamping space (5) through the mounting port (32).

6. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 3, characterized in that: The annular grinding component (7) is a grinding chain, and the driving wheel (81) and the driven wheel (82) are both sprockets.

7. The circuit breaker high-altitude terminal block grinding and clamping test device according to any one of claims 1 to 6, characterized in that: The mounting bracket (1) includes a hollow column (11) and a guide channel (12) that extends radially and axially along the hollow column (11). One end of the fixed clamp (2) is fixed to the top of the hollow column (11), and one end of the movable clamp (3) is slidably disposed in the guide channel (12). The bottom of the hollow column (11) is provided with a docking part (13) for connecting with the insulating operating rod (9).

8. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 7, characterized in that: The transmission mechanism (6) includes a fixed pulley (61), a rope winding component (62), and a pull rope (63) wound around the fixed pulley (61). One end of the pull rope (63) is connected to the movable clamp (3), and the other end is connected to the rope winding component (62).

9. The circuit breaker high-altitude terminal block grinding and clamping test device according to claim 8, characterized in that: The rope winding component (62) is an electric winding reel mounted on the hollow column (11), or the rope winding component (62) is a manual winding reel or an electric winding reel mounted on the lower part of the insulating operating rod (9).

10. A method for testing the grinding and clamping of a circuit breaker high-altitude terminal block, characterized in that, The test is conducted using the circuit breaker high-altitude terminal block grinding and clamping device as described in any one of claims 1 to 9, and includes the following steps: S1. Connect the mounting bracket (1) to the insulating operating rod (9), and extend the movable clamp (3) and the fixed clamp (2) to the circuit breaker high-altitude terminal block (4) through the insulating operating rod (9), so that the circuit breaker high-altitude terminal block (4) extends into the clamping space (5); S2. The movable clamping plate (3) is moved upward by the transmission mechanism (6) until the circuit breaker high-altitude terminal block (4) is clamped between the annular grinding piece (7) and the fixed clamping plate (2), and one end of the circuit breaker high-altitude terminal block (4) extends into the clamping space (5) and abuts against the blocking block (21). S3. Drive the annular grinding piece (7) to rotate towards the blocking block (21) by the rotary drive mechanism (8) to grind the lower surface of the circuit breaker high-altitude terminal block (4); S4. Use a loop resistance tester to connect the loop resistance test lead for testing.

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