An adaptive clamping device for withstand voltage testing of insulating tie rods

Abstract

This invention discloses an adaptive clamping device for withstand voltage testing of insulating tie rods, comprising: an upper cover plate and a lower cover plate, with a horizontal clamping assembly, an upper and lower clamping assembly, and a guide assembly sequentially disposed between the upper and lower cover plates; wherein, the insulating tie rod enters the upper and lower clamping assembly and the horizontal clamping assembly through the guide assembly for withstand voltage testing. This clamping device achieves withstand voltage testing of the insulating tie rod surface without blind spots, and through the cooperation of the horizontal clamping assembly and the upper and lower clamping assembly, improves the stability and firmness of clamping the insulating tie rod. It solves the technical defect of existing clamps that can only perform simple fixation when conducting withstand voltage testing on insulating tie rods, which easily causes the insulating tie rod to fall out of the clamp, making effective testing impossible.

Description

Technical Field

[0001] This invention belongs to the field of high voltage switch withstand voltage testing technology, specifically relating to an adaptive clamping device for withstand voltage testing of insulating tie rods. Background Technology

[0002] Insulating rods, as crucial linkage mechanisms in GIS (Gas Insulation System), play a vital role in connecting various transmission mechanisms and the high-voltage electrodes of the switch body. During factory inspection or type testing, GIS requires a withstand voltage test on the insulating rods. The test involves first fixing the insulating rod to a fixture, then applying a high-voltage power supply through a high-voltage generator, while simultaneously monitoring the withstand voltage of the insulating rod using ammeters and voltmeters. After the test, the insulation performance of the insulating rod is determined based on the test results to ensure it meets the requirements.

[0003] However, the clamps currently used can only provide simple fixation for the insulating tie rod during the withstand voltage test. The fixation is not very secure, and the insulating tie rod is very easy to fall out of the clamp during the withstand voltage test, making it impossible to conduct an effective test. Summary of the Invention

[0004] To address the aforementioned technical deficiencies, this invention provides an adaptive clamping device for withstand voltage testing of insulating tie rods. To achieve the above objective, this invention employs the following technical solution:

[0005] An adaptive clamping device for withstand voltage testing of insulating tie rods includes: an upper cover plate and a lower cover plate, wherein a horizontal clamping assembly, an upper and lower clamping assembly and a guide assembly are sequentially arranged between the upper cover plate and the lower cover plate;

[0006] The insulating tie rod enters the upper and lower clamping assemblies and the horizontal clamping assemblies through the guide assembly for pressure resistance testing.

[0007] Furthermore, the upper and lower clamping components are provided in two sets, one set of which is located on the inner side of the upper cover plate and the other set of which is located on the inner side of the lower cover plate. The two sets of upper and lower clamping components cooperate with each other to clamp the insulating pull rod.

[0008] Furthermore, each set of upper and lower clamping components consists of two components, which are arranged symmetrically to each other, and the two upper and lower clamping components cooperate with each other.

[0009] Furthermore, the upper and lower clamping assembly includes a hinge support, which is rotatably connected to a support member via a pivot pin. A spring and a guide rod are connected to the support member, and the spring is sleeved on the outside of the guide rod.

[0010] The guide rod is fixedly connected to a fixed base at one end. One end of the fixed base is provided with a clamping bearing, and the other end is provided with a connecting block. A guide shaft is inserted and removed from the clamping bearing.

[0011] Furthermore, a guide plate is provided between the upper cover plate and the lower cover plate. There are two guide plates, which are located above and below the upper and lower clamping components.

[0012] The guide plate has a first slot and a second slot, which are arranged alternately and each cooperates with the upper and lower clamping components.

[0013] Furthermore, there are two horizontal clamping components. One end of each horizontal clamping component is connected to the inner side of the upper cover plate, and the other end of each horizontal clamping component is connected to the inner side of the lower cover plate. The two horizontal clamping components are arranged from top to bottom along the width direction of the upper or lower cover plate.

[0014] Furthermore, the horizontal clamping assembly includes a long shaft, both ends of which pass through bushings and are connected to one end of two crank arms. The end of one crank arm is connected to the inner side of the upper cover plate, and the end of the other crank arm is connected to the inner side of the lower cover plate.

[0015] Furthermore, a bearing is sleeved on the outer side of the long shaft, and multiple bearings are provided along the entire length of the long shaft.

[0016] Furthermore, the end of the crank arm connected to the inner side of the upper cover plate is also provided with a short shaft, and the outer side of the short shaft is provided with a mounting bearing and a double-ended torsion spring.

[0017] The end of the short shaft passes through the mounting bearing and the double-ended torsion spring in sequence, extends to the outer side of the upper cover plate, and is connected to an adjusting block;

[0018] The adjusting block is fixedly connected to the short shaft by shims and screws.

[0019] Furthermore, a side plate is provided between the upper cover plate and the lower cover plate, and the guide assembly includes a guide mounting plate and a guide protection block. The guide mounting plates are symmetrically arranged on the side plate, and guide blocks are provided at both ends of the two guide mounting plates on opposite sides.

[0020] The guide protection block is disposed on the horizontal clamping assembly and is located above and below the upper and lower clamping assemblies.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The clamping device includes a horizontal clamping assembly, an upper and lower clamping assembly, and a guide assembly. The insulating pull rod is guided into the clamping device by the guide assembly. The upper and lower clamping assemblies clamp the two sides of the insulating pull rod, while the horizontal clamping assembly clamps the top and bottom of the insulating pull rod. This achieves pressure resistance testing of the insulating pull rod surface without any blind spots. Furthermore, the cooperation between the horizontal and upper and lower clamping assemblies improves the stability and firmness of the clamping of the insulating pull rod. This solves the technical defect of existing clamps that can only perform simple fixation when conducting pressure resistance testing on insulating pull rods, which easily causes the insulating pull rod to fall out of the clamp and makes effective testing impossible.

[0023] 2. Two sets of upper and lower clamping components clamp the insulating rod from both above and below, forming a double locking effect. This symmetrical and balanced clamping method can effectively prevent the insulating rod from shaking or shifting when subjected to external forces, greatly improving the stability and reliability of the clamping. Secondly, compared with a single clamping point or a single clamping component, two upper and lower clamping components can more evenly distribute the force on the insulating rod, which helps to reduce material fatigue or damage caused by local stress concentration and extends the service life of the insulating rod and its clamping device.

[0024] 3. Two symmetrical upper and lower clamping components ensure perfect balance of the insulating rod during clamping. Regardless of the shape or center of gravity of the insulating rod, the symmetrical clamping force effectively counteracts any possible torque or offset, making the insulating rod more stable in the clamped state. The simultaneous operation of the two upper and lower clamping components distributes the clamping force evenly on both sides of the insulating rod. This uniform force distribution helps reduce material fatigue or damage caused by localized stress concentration, thereby improving clamping safety and durability.

[0025] 4. A spring is sleeved on the outside of the guide rod, allowing the upper and lower clamping assemblies to adaptively adjust the clamping force according to the size and shape of the insulating rod. When the insulating rod is placed in the clamping position, the spring is compressed, generating a certain clamping force while maintaining a certain degree of elasticity. The hinge support is rotatably connected to the support member via a pin, giving the upper and lower clamping assemblies a certain degree of flexibility.

[0026] 5. The guide plate and its first and second slots provide precise guidance and positioning for the movement of the upper and lower clamping components, ensuring that the clamping components can move along a predetermined path when clamping and releasing the insulating rod, avoiding the risk of unstable clamping or damage to the insulating rod due to offset or shaking.

[0027] 6. The two horizontal clamping components significantly enhance the structural stability of the entire clamping device, effectively dispersing the stress and vibration that may be generated during operation, and preventing damage or deformation of components due to local stress concentration.

[0028] 7. The combination of the long shaft and the crank arm makes the force transmission in the horizontal clamping assembly more efficient and uniform. When external forces are applied to the insulating tie rod, these forces can be quickly and stably transmitted to the upper and lower cover plates through the horizontal clamping assembly, thereby achieving effective force dispersion and transmission.

[0029] 8. The main function of bearings is to reduce the direct contact and friction between the long shaft and other components during rotation or sliding. By installing multiple bearings, this friction can be further reduced, thereby reducing wear and extending the service life of the long shaft and the entire clamping assembly.

[0030] 9. The double-end torsion spring design enables the crank arm to automatically return to its original position after being subjected to external force, improving the response speed and accuracy of the horizontal clamping component, while also reducing errors and malfunctions caused by improper human operation.

[0031] 10. The installation of the guide assembly ensures that the insulating tie rod enters the upper and lower clamping assemblies and the horizontal clamping assemblies accurately. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the horizontal clamping component in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention;

[0035] Figure 3 A schematic diagram of the guide assembly and upper and lower clamping assemblies in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention;

[0036] Figure 4 This is a schematic diagram of the internal installation of the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0037] Figure 5 This is an assembly diagram of the horizontal clamping component in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention;

[0038] Figure 6This is a top view of the horizontal clamping assembly in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0039] Figure 7 This is a schematic diagram showing the cooperation between the horizontal clamping component and the upper and lower cover plates in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0040] Figure 8 This is a cross-sectional view of the crank arm installation in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0041] Figure 9 This is a schematic diagram of the installation of the upper and lower clamping components in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0042] Figure 10 This is a three-dimensional schematic diagram of the installation of the upper and lower clamping components in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0043] Figure 11 The above and below clamping components are installed in the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention.

[0044] Figure 12 A schematic diagram of the operation of the adaptive clamping device for withstand voltage testing of insulating tie rods provided by the present invention;

[0045] The components include: 1. Cover plate; 101. Upper cover plate; 102. Lower cover plate; 2. Side plate; 3. Guide plate; 301. First slot; 302. Second slot; 4. Horizontal clamping assembly; 401. Long shaft; 402. Bearing; 403. Bushing; 404. Crank arm; 405. Adjusting block; 406. Short shaft; 407. Mounting bearing; 408. Double-ended torsion spring; 409. Washer; 410. Screw; 5. Upper and lower clamping assemblies; 501. Hinge support; 502. Shaft pin; 503. Support; 504. Spring; 505. Guide rod; 506. Fixed seat; 507. Clamping bearing; 508. Guide shaft; 509. Connecting block; 6. Guide assembly; 601. Guide mounting plate; 602. Guide block; 603. Guide protection block; 7. Insulating pull rod. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present 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, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0051] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0052] Insulating rods, as crucial linkage mechanisms in GIS (Gas Insulation System), play a vital role in connecting various transmission mechanisms and the high-voltage electrodes of the switch body. During factory inspection or type testing, GIS requires a withstand voltage test on the insulating rods. The test involves first fixing the insulating rod to a fixture, then applying a high-voltage power supply through a high-voltage generator, while simultaneously monitoring the withstand voltage of the insulating rod using ammeters and voltmeters. After the test, the insulation performance of the insulating rod is determined based on the test results to ensure it meets the requirements.

[0053] However, the clamps currently used can only provide simple fixation for the insulating tie rod during the withstand voltage test. The fixation is not very secure, and the insulating tie rod is very easy to fall out of the clamp during the withstand voltage test, making it impossible to conduct an effective test.

[0054] In order to overcome the above-mentioned technical defects, the inventors have provided an adaptive clamping device for the withstand voltage test of insulating tie rods.

[0055] like Figures 1-11 As shown, an adaptive clamping device for withstand voltage testing of an insulating tie rod includes: a cover plate 1, which includes an upper cover plate 101 and a lower cover plate 102. A horizontal clamping assembly 4, an upper and lower clamping assembly 5, and a guide assembly 6 are sequentially arranged between the upper cover plate 101 and the lower cover plate 102. The horizontal clamping assembly 4 and the guide assembly 6 are located at one end and the other end, respectively, while the upper and lower clamping assembly 5 is located between the horizontal clamping assembly 4 and the guide assembly 6. When the insulating tie rod 7 is fed into the upper and lower clamping assembly 5 and the horizontal clamping assembly 4 via the guide assembly 6 for withstand voltage testing, as... Figures 1-4 As shown, the upper and lower clamping components 5 clamp the two sides of the insulating rod 7, and the horizontal clamping component 4 clamps the top and bottom of the insulating rod 7. On the one hand, this enables a pressure resistance test on the surface of the insulating rod 7 without any blind spots. On the other hand, the cooperation between the horizontal clamping component 4 and the upper and lower clamping components 5 improves the stability and firmness of the clamping of the insulating rod 7. This solves the technical defect of existing clamps that can only perform simple fixation when conducting pressure resistance tests on the insulating rod 7, which can easily cause the insulating rod to fall out of the clamp and make effective testing impossible.

[0056] like Figures 9-11 As shown, there are two sets of upper and lower clamping components 5. One set of upper and lower clamping components 5 is located on the inner side of the upper cover plate 101, and the other set is located on the inner side of the lower cover plate 102. The two sets of upper and lower clamping components 5 cooperate to clamp the insulating rod 7 on opposite sides. The two sets of upper and lower clamping components 5 clamp the insulating rod 7 from both upper and lower directions, forming a double locking effect. This symmetrical and balanced clamping method can effectively prevent the insulating rod 7 from shaking or shifting when subjected to external forces, greatly improving the stability and reliability of the clamping. Each set of upper and lower clamping components 5 consists of two components, symmetrically arranged. Compared to a single clamping point or a single clamping component, the two sets of upper and lower clamping components 5 can more evenly distribute the force on the insulating rod, helping to reduce material fatigue or damage caused by local stress concentration, and extending the service life of the insulating rod 7 and its clamping device.

[0057] like Figure 10 and Figure 11As shown, taking the upper and lower clamping assembly 5 installed at one end of the upper cover plate 101 as an example, the upper and lower clamping assembly 5 includes a hinge support 501, which is installed at the end of the upper cover plate 101. The hinge support 501 is rotatably connected to a support member 503 through a shaft pin 502. A spring 504 and a guide rod 505 are connected to the support member 503. The spring 504 is sleeved on the outside of the guide rod 505, so that the upper and lower clamping assembly 5 can adaptively adjust the clamping force according to the size and shape of the insulating pull rod 7. When the insulating pull rod 7 is placed in the clamping position, the spring will be compressed to generate a certain clamping force while maintaining a certain elasticity. The hinge support 501 is rotatably connected to the support member 503 through the shaft pin 502, which gives the upper and lower clamping assembly 5 a certain degree of flexibility. A fixed base 506 is fixedly connected to the end of the guide rod 505. One end of the fixed base 506 is provided with a clamping bearing 507, and the other end is provided with a connecting block 509. A guide shaft 508 is inserted and removed from the clamping bearing 507. In actual operation, there are two upper and lower clamping assemblies 5 inside the upper cover plate 101 and the lower cover plate 102. The two upper and lower clamping assemblies 5 are connected together through the clamping bearing 507.

[0058] like Figure 1 and Figure 11 As shown, a guide plate 3 is also provided between the upper cover plate 101 and the lower cover plate 102. There are two guide plates 3, which are located above and below the upper and lower clamping components 5. A first slot 301 and a second slot 302 are provided on the guide plate 3. The first slot 301 and the second slot 302 are arranged alternately and are both in cooperation with the upper and lower clamping components 5.

[0059] like Figures 2-7As shown, two horizontal clamping assemblies 4 are provided. One end of each horizontal clamping assembly 4 is connected to the inner side of the upper cover plate 101, and the other end is connected to the inner side of the lower cover plate 102. The two horizontal clamping assemblies 4 are arranged from top to bottom along the width direction of the upper cover plate 101 or the lower cover plate 102. Each horizontal clamping assembly 4 includes a long shaft 401, both ends of which pass through bushings 403 and are connected to one end of two crank arms 404. One crank arm 404 is connected to the inner side of the upper cover plate 101, and the other crank arm 404 is connected to the inner side of the lower cover plate 102. The combination of the long shaft 401 and the crank arms 4014 makes the force transmission in the horizontal clamping assembly 4 more efficient and uniform. When an external force is applied to the insulating pull rod 7, this force can be quickly and stably transmitted to the upper and lower cover plates through the horizontal clamping assembly 4, thereby achieving effective force dispersion and transmission. Furthermore, a bearing 402 is fitted on the outside of the long shaft 401. Multiple bearings 402 are provided along the entire length of the long shaft 401. The multiple bearings 402 are of the same specification. The main function of the bearings 402 is to reduce the direct contact and friction between the long shaft 401 and other components during rotation or sliding. By fitting multiple bearings, this friction can be further reduced, thereby reducing wear and extending the service life of the long shaft 401 and the entire clamping assembly.

[0060] like Figure 7 and Figure 8 As shown, the end of the crank arm 404 connected to the inner side of the upper cover plate 101 is also provided with a short shaft 406. The outer side of the short shaft 406 is provided with a mounting bearing 407 and a double-ended torsion spring 408. The end of the short shaft 406 extends to the outer side of the upper cover plate 101 through the mounting bearing 407 and the double-ended torsion spring 408 and is connected to an adjusting block 405. The adjusting block 405 is fixedly connected to the short shaft 406 by a washer 409 and a screw 410. The design of the double-ended torsion spring 408 enables the crank arm 404 to automatically return to its original position after being subjected to external force, which improves the response speed and accuracy of the horizontal clamping assembly 4, and also reduces errors and malfunctions caused by improper human operation.

[0061] like Figure 1 and Figure 4 As shown, a side plate 2 is also provided between the upper cover plate 101 and the lower cover plate 102. The guide assembly 6 includes a guide mounting plate 601 and a guide protection block 603. The guide mounting plates 601 are symmetrically arranged on the side plate 2. Guide blocks 602 are provided at both ends of the opposite side of the two guide mounting plates 601. The guide protection block 603 is arranged on the horizontal clamping assembly 4 and is located above and below the upper and lower clamping assemblies 5.

[0062] like Figure 12As shown, during the withstand voltage test of the insulating tie rod 7, the clamping device is installed inside the tank (the segmented withstand voltage equipment mainly operates inside the tank, which is a GIS high-voltage gas filling tank; the test and operating conditions of the insulating tie rod 7 are a high-voltage switch tank filled with SF6 gas. Therefore, the segmented withstand voltage test of the insulating tie rod 7 is also completed inside the test tank. The internal space of the test tank is small, and when the insulating tie rod enters the tank, a thrust is applied outside the tank). The insulating tie rod 7 is pushed towards the clamping device inside the tank, and is first guided by the guide assembly 6 to the upper and lower clamping assemblies 5. The head of the insulating tie rod 7 first contacts the upper and lower clamping assemblies. When the external thrust pushes the insulating rod 7 against the outer ring of the clamping bearing 507 of the upper and lower clamping assembly 5 and continues to advance, the thrust pushes the two sets of upper and lower clamping assemblies 5 apart in the upward and downward directions, respectively. At this time, the spring 504 inside the upper and lower clamping assembly 5 is compressed, allowing the upper and lower clamping assembly 5 to produce vertical displacement. At the same time, the compression of the spring 504 generates a counter-thrust force, causing the insulating rod 7 to be contacted and clamped by the upper and lower clamping assemblies 5. Since the guide rod 505 of the upper and lower clamping assembly 5 is fixed in the guide groove, the upper and lower clamping device 5 can only move in the vertical direction. After passing through the upper and lower clamping assemblies 5, the insulating rod 7 can continue to be advanced and then contact the horizontal clamping assembly 4. The insulating rod 7 continues to advance until the forward thrust of the insulating rod 7 can overcome the torsion spring torque and fully extend from the clamping bearings 507 on both sides. At this time, the two clamping bearings 507 clamp the insulating rod 7 in the horizontal direction under the action of the torsion spring torque. The horizontal clamping assembly 4 utilizes the lever principle of the torsion spring to generate rotational force for horizontal clamping, while the vertical clamping assembly 5 achieves vertical clamping through the axial elastic deformation of the compression spring 504. Both assemblies employ bearings to reduce friction, allowing the insulating pull rod 7 to enter the clamping state more smoothly and steadily, while also reducing energy consumption and surface damage caused by friction.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A self-adapting clamping device for insulation pull rod pressure test, characterized in that, The utility model relates to a kind of insulating pull rod testing device, including: Upper cover plate (101) and lower cover plate (102), upper cover plate (101) and lower cover plate (102) are sequentially provided with horizontal clamping component (4), upper and lower clamping component (5) and guide component (6) between; Wherein, insulation pull rod (7) enters upper and lower clamping component (5) and horizontal clamping component (4) by guide component (6) and carries out pressure test; The horizontal clamping component (4) includes a long shaft (401), both ends of the long shaft (401) are connected with one end of two crank arms (404) through a shaft sleeve (403), and the end of one of the crank arms (404) is connected with the inner side of the upper cover plate (101), and the end of the other crank arm (404) is connected with the inner side of the lower cover plate (102). The upper and lower clamping component (5) includes a hinged support (501), the hinged support (501) is rotatably connected with a support (503) through a shaft pin (502), the support (503) is connected with a spring (504) and a guide rod (505), the spring (504) is sleeved on the outer side of the guide rod (505). The end of the guide rod (505) is fixedly connected with a fixed seat (506), one end of the fixed seat (506) is provided with a clamping bearing (507), the other end is provided with a connecting block (509), and the clamping bearing (507) is provided with a guide shaft (508).

2. The apparatus of claim 1, wherein, The upper and lower clamping component (5) is provided with two groups, one of the upper and lower clamping component (5) is arranged on the inner side of the upper cover plate (101), the other group of the upper and lower clamping component (5) is arranged on the inner side of the lower cover plate (102), and the two groups of the upper and lower clamping component (5) cooperate with each other to clamp the insulation pull rod (7).

3. The apparatus of claim 2, wherein, The number of the upper and lower clamping component (5) in each group is two, and they are arranged symmetrically, and cooperate with each other between the two upper and lower clamping components (5).

4. The apparatus of claim 1, wherein, The upper cover plate (101) and the lower cover plate (102) are further provided with a guide plate (3), the guide plate (3) is provided with two, and the two guide plates (3) are located above and below the upper and lower clamping component (5). The guide plate (3) is provided with a first slot hole (301) and a second slot hole (302), the first slot hole (301) and the second slot hole (302) are sequentially and spacedly arranged, and cooperate with the upper and lower clamping component (5).

5. The apparatus of claim 1, wherein, The horizontal clamping component (4) is provided with two, one end of the two horizontal clamping components (4) is connected with the inner side of the upper cover plate (101), the other end of the two horizontal clamping components (4) is connected with the inner side of the lower cover plate (102), and the two horizontal clamping components (4) are arranged from top to bottom along the width direction of the upper cover plate (101) or the lower cover plate (102).

6. The apparatus of claim 1, wherein, The outer side of the long shaft (401) is sleeved with a bearing (402), and the bearing (402) is provided with a plurality of bearings along the length direction of the long shaft (401).

7. The apparatus of claim 1, wherein, The end of the crank arm (404) connected with the inner side of the upper cover plate (101) is also provided with a short shaft (406), and the outer side of the short shaft (406) is provided with a mounting bearing (407) and a double-end torsion spring (408); The end of the short shaft (406) extends to the outer side of the upper cover plate (101) through the mounting bearing (407) and the double-end torsion spring (408) in sequence and is connected with an adjusting block (405); The adjusting block (405) is fixedly connected with the short shaft (406) through a gasket (409) and a screw (410).

8. The apparatus of claim 1, wherein, The upper cover plate (101) and the lower cover plate (102) are also provided with a side plate (2), the guide assembly (6) comprises a guide mounting plate (601) and a guide protection block (603), the guide mounting plate (601) is symmetrically arranged on the side plate (2), and the two ends of the opposite side of the two guide mounting plates (601) are both provided with a guide block (602); The guide protection block (603) is arranged on the horizontal clamping assembly (4) and is located above and below the up-down clamping assembly (5).

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