Device for measuring meshing depth of moving and static contacts of high-voltage cabinet

Abstract

The utility model belongs to the technical field of power distribution equipment maintenance, and discloses a high-voltage cabinet moving and static contact meshing depth measuring device. The high-voltage cabinet moving and static contact meshing depth measuring device comprises a pull rope encoder, a measuring ring and a measuring control system. Wherein the pull rope encoder is mounted at one end, far away from the moving contact, of the static contact; the measuring ring is sleeved on the static contact in a sliding manner and is connected with a pull rope of the pull rope encoder; in the meshing process of the moving contact and the static contact, the measuring ring can be pushed by the moving contact to slide on the static contact; and the measurement control system is in signal connection with the pull rope encoder and is used for processing a length signal of the pull rope sent by the pull rope encoder and displaying a measurement result. The device for measuring the meshing depth of the moving and static contacts of the high-voltage cabinet is simple in structure, relatively convenient to mount and dismount, relatively high in measurement precision, capable of carrying out real-time measurement and relatively high in detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution equipment maintenance, in particular to a device for measuring the meshing depth of moving and static contacts of a high-voltage cabinet. Background Technique

[0002] In a high-voltage cabinet, the moving contact on the trolley circuit breaker needs to mesh with the static contact to achieve the conduction of the main circuit. The meshing depth and centering degree of the moving and static contacts directly affect the size of the contact resistance and the operation stability of the equipment. If the meshing depth is insufficient and there is a virtual contact, it may lead to an excessive contact resistance, resulting in too high a temperature, and then accelerating the oxidation of the contact surface and increasing the contact resistance. Such a vicious cycle will finally lead to arcing and even explosion. If the meshing depth is too large, it may cause the contact arm of the circuit breaker to jam against the static contact. Therefore, it is necessary to measure the meshing depth of the moving and static contacts during the factory acceptance, pre-commissioning acceptance or equipment maintenance of the equipment.

[0003] At present, most measurements are carried out manually. The method is as follows: Apply a small amount of vaseline on the moving contact, push the trolley to the operating position, then pull the trolley out of the cabinet, manually remove the static contact in the contact box, measure the indentation left on the static contact when the moving and static contacts are in contact with a vernier caliper or a tape measure, and then install the static contact back. The whole process is time-consuming and laborious, with a large measurement error, and there is a risk that the position of the static contact after reinstallation is deviated from the original position. There are also some devices that can detect the meshing depth of the moving and static contacts. By setting a displacement sensor on the moving contact, the meshing depth of the moving and static contacts is judged by the displacement of the moving contact. However, most of them have a relatively complex structure, are inconvenient to install, and have poor detection efficiency and accuracy.

[0004] Therefore, it is urgent to propose a device for measuring the meshing depth of moving and static contacts of a high-voltage cabinet to solve the above technical problems. Content of the Utility Model

[0005] The utility model provides a device for measuring the meshing depth of moving and static contacts of a high-voltage cabinet, which has a simple structure, is relatively convenient to install and disassemble, has a high measurement accuracy, can perform real-time measurement, and has a high detection efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A device for measuring the meshing depth of moving and static contacts of a high-voltage cabinet, comprising:

[0008] A rope-pull encoder, installed at one end of the static contact away from the moving contact;

[0009] A measuring ring, slidably sleeved on the static contact and connected to the pull rope of the rope-pull encoder; during the meshing process of the moving contact and the static contact, the measuring ring can be pushed by the moving contact to slide on the static contact;

[0010] The measurement control system is connected to the draw rope encoder signal and is used for processing the length signal of the draw rope sent by the draw rope encoder and displaying the measurement result.

[0011] Optionally, the measurement control system includes:

[0012] A signal acquisition and processing module, connected to the draw-wire encoder signal, for acquiring the length signal of the draw-wire encoder and processing the length signal into a digital signal;

[0013] An error compensation module, used for performing error compensation on the digital signal;

[0014] Control module, used to issue control commands;

[0015] The display screen is used for inputting and outputting control commands, and / or displaying the digital signals in real time.

[0016] Optionally, the measurement and control system further comprises an alarm module signal-connected to the signal acquisition and processing module, and the alarm module is used to give an alarm when the value of the digital signal is greater than or equal to a limit value.

[0017] Optionally, the inner surface of the measuring ring in contact with the static contact is smoothly arranged.

[0018] Optionally, the measuring ring has a first opening, and two ends of the measuring ring close to the first opening can be elastically moved closer or farther away; a locking member is provided on the measuring ring, and the locking member is used to adjust the size of the first opening.

[0019] Optionally, the locking member is an elastic ring, and a first annular groove is provided on the measuring ring along the circumference of the measuring ring, and the elastic ring is installed in the first groove.

[0020] Optionally, a connecting ear is provided on the measuring ring, a connecting notch is opened on the connecting ear, the pull rope is inserted into the connecting notch from the opening of the connecting notch, and a fixing cap is provided at the end of one end of the pull rope connected to the connecting notch, and the fixing cap abuts against the side of the connecting ear away from the pull rope encoder.

[0021] Optionally, the high-voltage switchgear moving and static contact engagement depth measuring device further includes an encoder fixing member installed at one end of the static contact away from the moving contact. The encoder fixing member includes an annular hoop body with a second opening, an elastic band, and a connecting plate. The two ends of the hoop body near the second opening can elastically approach or move away from each other. The hoop body is sleeved on the static contact, and the elastic band is wound around the hoop body to fix the hoop body to the static contact. Both ends of the elastic band are connected to the connecting plate, and the connecting plate is used to fix the rope-pulling encoder.

[0022] Optionally, planes are provided on the outer surfaces of the two ends of the hoop body near the second opening, and the two planes are used for installing the connecting plate.

[0023] Optionally, along the circumferential direction of the hoop body, a second groove is provided on the hoop body, and the elastic band is installed in the second groove.

[0024] Advantages of the present utility model:

[0025] The present utility model provides a high-voltage switchgear moving and static contact engagement depth measuring device, including a rope-pulling encoder, a measuring ring, and a measuring control system. When measuring the engagement depth of the moving and static contacts, during the engagement process of the moving contact and the static contact, the measuring ring will be pushed to slide relative to the static contact, that is, the engagement depth of the moving contact and the static contact is equal to the moving distance of the measuring ring, and the measuring ring is connected to the rope of the rope-pulling encoder. Therefore, the change in the rope length is equal to the engagement depth of the moving contact and the static contact. The high-voltage switchgear moving and static contact engagement depth measuring device provided in this embodiment can measure the engagement depth of the moving and static contacts in real time. Compared with the method of manual measurement in the prior art, it is not necessary to disassemble the static contact, the measurement method is simple, and the accuracy of the measurement result is relatively high; the measurement result can be obtained immediately after the moving contact and the static contact are engaged, and the measurement efficiency is relatively high; the structure is simple, the installation and disassembly are relatively convenient, and the production cost is relatively low.

[0026] Since the moving contact is arranged around the outer circumference of the static contact, during the engagement process of the moving contact and the static contact, the measuring ring is evenly stressed in the circumferential direction, improving the stability of the change in the rope length and, to a certain extent, improving the accuracy of the measurement result. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0028] Figure 1 It is an exploded schematic diagram of the device for measuring the meshing depth of the moving and static contacts of a high-voltage cabinet provided by an embodiment of the present utility model;

[0029] Figure 2 It is a structural schematic diagram of the device for measuring the meshing depth of the moving and static contacts of a high-voltage cabinet provided by the present utility model.

[0030] In the figure:

[0031] 10. Static contact;

[0032] 100. Pull rope encoder; 110. Pull rope; 120. Fixed cap;

[0033] 200. Measuring ring; 210. First opening; 220. Locking member; 230. First groove; 240. Connecting ear; 241. Connecting notch;

[0034] 300. Encoder fixing member; 310. Hoop body; 311. Second opening; 312. Plane; 313. Second groove; 320. Elastic band; 330. Connecting plate. Detailed implementation manners

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] This embodiment provides a device for measuring the meshing depth of the static and dynamic contacts of a high-voltage cabinet, which has a simple structure, is relatively convenient for installation and disassembly, has a high measurement accuracy, can perform real-time measurement, and has a high detection efficiency.

[0040] Specifically, as Figure 1 and Figure 2 shown, the device for measuring the meshing depth of the static and dynamic contacts of the high-voltage cabinet includes a cable encoder 100, a measuring ring 200, and a measurement control system.

[0041] Among them, the cable encoder 100 is installed at one end of the static contact 10 far from the dynamic contact. The measuring ring 200 is slidably sleeved on the static contact 10 and is connected to the cable 110 of the cable encoder 100. During the meshing process of the dynamic contact and the static contact 10, the measuring ring 200 can be pushed by the dynamic contact to slide on the static contact 10. The measurement control system is signal-connected to the cable encoder 100 and is used to process the length signal of the cable 110 sent by the cable encoder 100 and display the measurement result.

[0042] It should be noted that the signal connection between the measurement control system and the cable encoder 100 can be achieved through a wired connection or a wireless connection.

[0043] The usage method of the device for measuring the meshing depth of the static and dynamic contacts of the high-voltage cabinet is as follows:

[0044] First, install the cable encoder 100 at one end of the static contact 10 far from the dynamic contact, install the measuring ring 200 at one end of the static contact 10 close to the dynamic contact, and connect the cable 110 of the cable encoder 100 to the measuring ring 200;

[0045] Then, after performing a zeroing operation on the measurement control system, start the measurement, and at the same time control the handcart to move from the test position to the working position, that is, make the dynamic contact mesh with the static contact 10 until the dynamic contact moves to the meshing termination position.

[0046] When the moving contact starts to engage with the static contact 10, the moving contact will come into contact with the measuring ring 200 installed at the end of the static contact 10. As the moving contact continues to engage with the static contact 10, the moving contact will push the measuring ring 200 to slide on the static contact 10. The sliding of the static contact 10 will cause a change in the length of the pull rope 110 connected to it. That is, the change in the length of the pull rope 110 is equal to the engagement depth between the moving contact and the static contact 10. The pull rope encoder 100 will send the length signal of the pull rope 110 to the measurement control system, and after being processed by the measurement control system, the measurement result will be finally displayed.

[0047] The device for measuring the engagement depth of the moving and static contacts of the high-voltage switch cabinet provided in this embodiment can measure the engagement depth of the moving and static contacts 10 in real time. Compared with the existing method of manual measurement, it is not necessary to disassemble the static contact 10, the measurement method is simple, and the accuracy of the measurement result is relatively high; the measurement result can be obtained immediately after the moving contact and the static contact 10 finish engaging, and the measurement efficiency is relatively high; the structure is simple, the installation and disassembly are relatively convenient, and the production cost is relatively low.

[0048] Moreover, since the moving contact is arranged around the outer circumference of the static contact 10, during the engagement process between the moving contact and the static contact 10, the measuring ring 200 is evenly stressed circumferentially, which improves the stability of the change in the length of the pull rope 110 and improves the accuracy of the measurement result to a certain extent.

[0049] Furthermore, the measurement control system includes a signal acquisition and processing module, an error compensation module, a control module, and a display screen. Among them, the signal acquisition and processing module is signal-connected to the pull rope encoder 100, and is used to collect the length signal of the pull rope encoder 100 and process the length signal into a digital signal. The error compensation module is used to perform error compensation on the digital signal, eliminate other irrelevant interferences, and ensure the accuracy of the measurement result. The control module is used to issue control commands. The display screen is used for input, output, and / or real-time display of the digital signal, and the display screen performs human-computer interaction through the control module.

[0050] It should be noted that the signal connection between the signal acquisition and processing module and the pull rope encoder 100 can be achieved through a wired connection or a wireless connection.

[0051] Due to the setting of the error compensation module in this measurement control system, the accuracy of the measurement result is improved.

[0052] Preferably, the measurement control system further includes an alarm module that is signal-connected to the signal acquisition and processing module. The alarm module is used to give an alarm when the value of the digital signal is greater than or equal to the limit value. It can be understood that when the value of the digital signal is greater than or equal to the limit value, if the moving contact continues to move, the static contact 10 will be damaged. Therefore, by setting the alarm module, the operator can be reminded in time, which protects the static contact 10 to a certain extent.

[0053] It should be noted that the signal connection between the signal acquisition and processing module and the alarm module can be achieved through wired connection or wireless connection.

[0054] In this embodiment, the measurement and control system can be a centralized or distributed controller. For example, the controller can be a single microcontroller or composed of multiple distributed microcontrollers. A control program can run in the microcontroller to control the signal acquisition and processing module, error compensation module, control module, alarm module, etc. to implement their functions.

[0055] It should be noted that the circuit structures of each module such as the signal acquisition and processing module, error compensation module, control module, alarm module, and display screen, as well as the connection structures between the modules, are all prior arts. What this application intends to protect is that the measurement and control system has functions such as processing length signals, error compensation, alarming, and measurement, rather than the circuit structures of each module itself and the connection structures between the modules.

[0056] Preferably, in order to avoid scratching the surface of the static contact 10 during the sliding of the measurement ring 200 on the static contact 10, the inner surface of the measurement ring 200 in contact with the static contact 10 is set to be smooth. Optionally, the measurement ring 200 can be made of a material with wear resistance and low friction coefficient characteristics, such as polytetrafluoroethylene, which has self-lubricating performance and is wear-resistant.

[0057] Furthermore, continue to refer to Figure 1 and Figure 2 , in this embodiment, the measurement ring 200 has a first opening 210, and both ends of the measurement ring 200 close to the first opening 210 can elastically approach or move away from each other. A locking member 220 is provided on the measurement ring 200, and the locking member 220 is used to adjust the size of the first opening 210 so that the measurement ring 200 is slidably sleeved on the static contact 10. With such a setting, on the one hand, it is convenient for the assembly between the measurement ring 200 and the static contact 10, and during the assembly of the measurement ring 200, the static contact 10 can be avoided from being scratched by enlarging the first opening 210; on the other hand, the setting of the first opening 210 enables the diameter of the measurement ring 200 to be adjustable, so as to be able to adapt to static contacts 10 with different diameters, improving the universality of the above-mentioned high-voltage switchgear static and dynamic contact engagement depth measurement device. Moreover, the setting of the locking member 220 can adjust the gap between the measurement ring 200 and the static contact 10 according to requirements, which can not only ensure the connection strength between the measurement ring 200 and the static contact 10, but also avoid too large frictional resistance between the measurement ring 200 and the static contact 10 when the measurement ring 200 slides, ensuring the smoothness of the measurement ring 200 sliding to a certain extent.

[0058] Optionally, continue to refer to Figure 1 and Figure 2In a possible embodiment, the locking member 220 is an elastic ring, which is sleeved outside the measuring ring 200. The elastic ring has a simple structure and is easy to install. The size of the first opening 210 can be controlled by selecting an elastic ring with a suitable elastic force.

[0059] Alternatively, the elastic ring may be formed by connecting springs end to end.

[0060] Preferably, continue to see Figure 1 and Figure 2 A first annular groove 230 is provided on the measuring ring 200 along the circumference of the measuring ring 200, and the elastic ring is installed in the first groove 230. The first groove 230 is provided to fix the elastic ring, thereby improving the stability of the installation of the elastic ring and thus improving the reliability of the installation of the measuring ring 200. In addition, the provision of the first groove 230 can also reduce the weight of the measuring ring 200, thereby reducing the difficulty of the moving contact to push the measuring ring 200.

[0061] Optionally, in another possible embodiment, flanges may be provided at both ends of the measuring ring 200 close to the first opening 210, and locking holes may be provided on the flanges so that bolts pass through the two locking holes and are connected to nuts, and the size of the first opening 210 may be controlled by controlling the tightening degree of the nuts.

[0062] Of course, in other embodiments, the structure of the locking member 220 may also be set to other structures according to actual needs, and this application does not make any specific limitations.

[0063] Further, see Figure 1 and Figure 2 The measuring ring 200 is provided with a connecting ear 240, and a connecting notch 241 is provided on the connecting ear 240. The pull rope 110 is inserted into the connecting notch 241 from the opening of the connecting notch 241, and a fixing cap 120 is provided at the end of the pull rope 110 connected to the connecting notch 241, and the fixing cap 120 abuts against the side of the connecting ear 240 away from the pull rope encoder 100. The connection between the pull rope 110 and the measuring ring 200 is realized by the cooperation of the connecting notch 241 and the fixing cap 120, and the structure is simple, easy to process, and the assembly of the pull rope 110 and the measuring ring 200 is also relatively easy.

[0064] Further, see Figure 1 and Figure 2 The above-mentioned high-voltage cabinet moving and static contact engagement depth measuring device also includes an encoder fixing part 300 installed at the end of the static contact 10 away from the moving contact. The encoder fixing part 300 is used to fix the pull-wire encoder 100. By setting the encoder fixing part 300, the reliability of the installation of the pull-wire encoder 100 can be improved.

[0065] Specifically, in this embodiment, the encoder fixing member 300 includes a ring-shaped clamp body 310 with a second opening 311, an elastic band 320 and a connecting plate 330, and the two ends of the clamp body 310 close to the second opening 311 can be elastically close to or away from each other, the clamp body 310 is sleeved on the static contact 10, and the elastic band 320 is wound around the clamp body 310 to fix the clamp body 310 to the static contact 10. Both ends of the elastic band 320 are connected to the connecting plate 330, and the connecting plate 330 is used to fix the rope encoder 100.

[0066] The encoder fixing part 300 can be adapted to the static contacts 10 of different diameters through the cooperation of the clamp body 310 and the elastic band 320. It has high universality and simple structure. During installation, the second opening 311 of the clamp body 310 is enlarged and then the end of the static contact 10 is put on the static contact 10. Then, the clamp body 310 is pushed to the bottom of the static contact 10 and the elastic band 320 is wrapped around it to complete the installation of the encoder fixing part 300 and the pull rope encoder 100. The installation and disassembly are relatively convenient, which can improve the efficiency of the above-mentioned high-voltage cabinet dynamic and static contact engagement depth measuring device.

[0067] Optionally, the rope encoder 100 can be fixed to the connecting plate 330 by bolt connection. The threaded connection structure has high connection reliability and is convenient to install and disassemble.

[0068] Preferably, continue to see Figure 1 The outer surfaces of the two ends of the clamp body 310 near the second opening 311 are both provided with planes 312, and the two planes 312 are used to install the connecting plate 330. In this way, on the one hand, the connecting plate 330 can be better fixed by the planes 312, which can not only improve the installation stability of the cable encoder 100, but also reduce the size of the cable encoder 100 protruding from the static contact 10, reducing the occupied space; on the other hand, the connecting plate 330 can block the second opening 311, improving the aesthetics.

[0069] It is understandable that the size of the second opening 311 can be controlled by selecting an elastic band 320 with appropriate elasticity to ensure the reliability of the installation of the clamp body 310 .

[0070] Further, see Figure 1 and Figure 2 A second groove 313 is provided on the clamp body 310 along the circumference of the clamp body 310, and the elastic band 320 is installed in the second groove 313. The second groove 313 is provided to fix the elastic band 320, thereby improving the stability of the installation of the elastic band 320, thereby improving the reliability of the installation of the clamp body 310 and the reliability of the installation of the wire encoder 100.

[0071] It should be noted that the elastic band 320 is optional but not limited to a spring.

[0072] It should be noted that some avoidance structures can be provided on the hoop body 310 to avoid other components in the high-voltage cabinet so as to adapt to the installation space.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A device for measuring the engagement depth of moving and static contacts of a high-voltage cabinet, characterized in that: include: A pull-wire encoder (100) is mounted on an end of the stationary contact (10) away from the moving contact; A measuring ring (200) is slidably mounted on the stationary contact (10) and is connected to the draw rope (110) of the draw rope encoder (100); during the meshing process between the moving contact and the stationary contact (10), the measuring ring (200) can be pushed by the moving contact to slide on the stationary contact (10); A measurement control system is connected to the cable encoder (100) signal and is used to process the length signal of the cable (110) sent by the cable encoder (100) and display the measurement result.

2. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 1 is characterized in that: The measurement control system comprises: A signal acquisition and processing module, connected to the cable encoder (100) and used to acquire a length signal of the cable encoder (100) and process the length signal into a digital signal; An error compensation module, used for performing error compensation on the digital signal; Control module, used to issue control commands; The display screen is used for inputting and outputting control commands, and / or displaying the digital signals in real time.

3. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 2 is characterized in that: The measurement control system further comprises an alarm module connected to the signal acquisition and processing module, and the alarm module is used for giving an alarm when the value of the digital signal is greater than or equal to a limit value.

4. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 1 is characterized in that: The inner surface of the measuring ring (200) in contact with the static contact (10) is arranged to be smooth.

5. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 1, characterized in that: The measuring ring (200) has a first opening (210), and two ends of the measuring ring (200) close to the first opening (210) can be elastically moved closer or farther away; a locking member (220) is provided on the measuring ring (200), and the locking member (220) is used to adjust the size of the first opening (210).

6. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 5, characterized in that: The locking member (220) is an elastic ring. A first annular groove (230) is provided on the measuring ring (200) along the circumference of the measuring ring (200). The elastic ring is installed in the first groove (230).

7. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 1 is characterized in that: The measuring ring (200) is provided with a connecting ear (240), and a connecting notch (241) is opened on the connecting ear (240). The pull rope (110) is inserted into the connecting notch (241) from the opening of the connecting notch (241), and a fixing cap (120) is provided at the end of one end of the pull rope (110) connected to the connecting notch (241), and the fixing cap (120) abuts against a side of the connecting ear (240) facing away from the pull rope encoder (100).

8. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 1 is characterized in that: The high-voltage cabinet moving and stationary contact engagement depth measuring device also includes an encoder fixing part (300) installed at one end of the stationary contact (10) away from the moving contact, the encoder fixing part (300) includes an annular clamp body (310) with a second opening (311), an elastic band (320) and a connecting plate (330), the two ends of the clamp body (310) close to the second opening (311) can be elastically moved closer or farther away, the clamp body (310) is sleeved on the stationary contact (10), the elastic band (320) is wound around the clamp body (310) to fix the clamp body (310) to the stationary contact (10), and the two ends of the elastic band (320) are connected to the connecting plate (330), and the connecting plate (330) is used to fix the pull rope encoder (100).

9. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 8, characterized in that: The outer surfaces of both ends of the clamp body (310) close to the second opening (311) are provided with planes (312), and the two planes (312) are used to install the connecting plate (330).

10. The device for measuring engagement depth of moving and static contacts of a high-voltage cabinet according to claim 8, characterized in that: A second groove (313) is provided on the clamp body (310) along the circumference of the clamp body (310), and the elastic band (320) is installed in the second groove (313).

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