A wear-in test device for a circuit breaker contact

Abstract

The application discloses a running-in inspection device for a circuit breaker contact, which comprises a base, a first mounting seat and a second mounting seat arranged on the base, and a driving assembly. The first mounting seat is used for positioning a static contact, and the second mounting seat is provided with a mounting hole used for slidingly matching a moving contact. The driving assembly comprises a power source and a connecting seat arranged at an output end of the power source. The connecting seat is provided with a connecting part used for connecting a moving arc contact in the moving contact. The connecting seat is configured to be able to reciprocally move in a first direction under the driving of the power source, so as to drive the moving contact to slide into and exit the static contact. The application can be used for running-in and inspection before formal assembly of the moving contact and the static contact. Not only can it be confirmed whether the two can normally work together, but also can the problem that the two cannot normally dock be eliminated through running-in, so that the qualified rate and reliability of products can be greatly improved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker assembly equipment technology, and specifically to a break-in inspection device for circuit breaker contacts. Background Technology

[0002] A circuit breaker is a switching device capable of connecting and disconnecting circuits under normal and fault conditions. The circuit breaker contacts are one of the key components of a circuit breaker, responsible for connecting, disconnecting, and loading the circuit. Circuit breaker contacts include moving contacts and stationary contacts. Moving contacts include moving main contacts and moving arc contacts, while stationary contacts include stationary main contacts and stationary arc contacts. When the circuit breaker is operating, the operating mechanism, upon receiving a command, drives the moving contact towards the stationary contact, thus establishing electrical continuity between them. When the moving and stationary contacts are energized, the end of the moving main contact extends into the stationary main contact, and the end of the stationary arc contact extends into the moving arc contact.

[0003] However, due to manufacturing tolerances, the ends of the moving and stationary contacts may not meet the required fit, preventing the moving contact from properly engaging with the stationary contact to conduct electricity during circuit breaker operation. This problem is not detected during circuit breaker assembly; it only becomes apparent after power-on testing. This necessitates disassembling the circuit breaker and manually polishing the ends of the moving and stationary contacts using sandpaper or grinding tools. This disassembly, assembly, power-on testing, and manual polishing process may need to be repeated multiple times to achieve proper fit between the moving and stationary contacts, resulting in low efficiency and negatively impacting the circuit breaker's pass rate and reliability. Summary of the Invention

[0004] This application aims to address one of the technical problems in related technologies to a certain extent. To this end, this application provides a running-in testing device for circuit breaker contacts.

[0005] To achieve the above objectives, this application adopts the following technical solution: a break-in inspection device for circuit breaker contacts, the break-in inspection device comprising a base, a first mounting base, a second mounting base, and a drive assembly, wherein the first mounting base, the second mounting base, and the drive assembly are all disposed on the base, the first mounting base is used to position the stationary contact, and the second mounting base is provided with a mounting hole for sliding engagement with the moving contact; the drive assembly comprises a power source and a connecting seat disposed at the output end of the power source, the connecting seat is provided with a connecting part for connecting with the moving arc contact in the moving contact, and the connecting seat is configured to reciprocate along a first direction under the drive of the power source, so as to drive the moving contact to slide into and out relative to the stationary contact.

[0006] The application of this application has the following beneficial effects: By setting a first mounting base to position the stationary contact, the stationary contact's fixed state during actual operation can be simulated. By setting a second mounting base with a mounting hole and a drive mechanism, the moving contact's ability to slide in and out relative to the stationary contact during actual operation can be simulated. Therefore, before formal assembly of the moving and stationary contacts, this break-in and inspection device can be used to break in and inspect the moving and stationary contacts. This not only confirms whether the two can work properly together, but also eliminates potential problems with proper mating through break-in, thereby greatly improving the product's pass rate and reliability, and significantly reducing subsequent verification costs.

[0007] Optionally, the break-in testing device further includes a third mounting base disposed on the machine base, and the drive assembly further includes:

[0008] A clutch is located at the output end of the power source and has an engaged state and a disengaged state.

[0009] A push-pull rod, one end of which is connected to the clutch and the other end of which is connected to the connecting seat; and,

[0010] An elastic element is disposed between the third mounting base and the connecting base;

[0011] Wherein, when the clutch is in the engaged state, the push-pull rod can transmit the output power of the power source to the connecting seat, so as to drive the connecting seat to move in the opposite direction in the first direction and compress the elastic element to a predetermined compression stroke.

[0012] The elastic element can drive the connecting seat to move along a first direction through elastic deformation when the predetermined compression stroke is and the clutch is in the disengaged state.

[0013] Optionally, the drive assembly further includes a transmission component disposed at the output end of the clutch, the transmission component being able to rotate around a set axis by a power source when the clutch is in the engaged state; one end of the push-pull rod is movably hinged to the transmission component via a connecting shaft, and the axis of the connecting shaft is parallel to and spaced from the set axis, and the other end of the push-pull rod is movably hinged to a connecting seat.

[0014] Optionally, the break-in inspection device further includes a guide rail disposed on the base, the guide rail having limit grooves on both sides along the first direction, the connecting seat having a sliding groove adapted to the guide rail and a protrusion adapted to the limit groove, the sliding groove slidingly engaging with the guide rail, and the protrusion slidingly engaging with the limit groove.

[0015] Optionally, the break-in testing device further includes a buffer disposed on the base, the buffer being spaced apart from the connecting seat, and the buffer being used to limit the travel of the connecting seat during the movement of the connecting seat in the first direction.

[0016] Optionally, the second mounting base has an extension extending toward the third mounting base, the extension having a mounting groove extending in a first direction, the connecting base being slidably disposed on the extension, and the buffer being positioned on the extension.

[0017] Optionally, the break-in testing device further includes a linear drive and a limiting plate connected to the linear drive, both of which are mounted on the base; the connecting seat is provided with a limiting part for cooperating with the limiting plate, and the limiting plate can push the connecting seat to move in the opposite direction in the first direction by applying pressure to the limiting part under the drive of the linear drive.

[0018] Optionally, the break-in inspection device further includes a force sensor disposed on the connecting seat, one side of the force sensor being connected to the connecting seat, and the other side of the force sensor being used to connect to the moving contact, so as to measure the force between the moving contact and the stationary contact during the sliding extension and retraction of the moving contact relative to the stationary contact.

[0019] Optionally, the connector includes:

[0020] The base has an assembly groove.

[0021] A connecting block, having the connecting portion formed at one end and a limiting flange formed at the other end, the limiting flange extending into the assembly groove; and...

[0022] A limiting ring, which is detachably disposed on the base, is used to cooperate with a limiting flange to prevent the connecting block from detaching from the base;

[0023] The force sensor is disposed in the assembly groove, and its two sides are fixedly connected to the bottom wall of the assembly groove and the connecting block, respectively.

[0024] Optionally, the inner wall of the mounting hole is provided with an annular groove, and the running-in inspection device further includes a contact finger spring disposed in the annular groove, the contact finger spring being used to surround and abut against the outside of the moving contact.

[0025] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0026] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0027] Figure 1 A schematic diagram of the running-in inspection device for circuit breaker contacts provided in an embodiment of this application;

[0028] Figure 2 This is a top view of the break-in test equipment;

[0029] Figure 3 This is a schematic diagram illustrating the application of the break-in testing device.

[0030] Figure 4 A schematic diagram showing another perspective on the application of the break-in testing device;

[0031] Figure 5 An exploded view of the connecting seat and force sensor in the break-in testing device;

[0032] Figure 6 This is a cross-sectional view of the connecting seat and force sensor in the break-in test device;

[0033] Figure 7 This is a side view of the break-in test device in its initial state.

[0034] Figure 8 This is a side view of the running-in test device when the moving contact is pushed to mate with the stationary contact for running-in.

[0035] Among them, 1. base; 2. first mounting seat; 3. second mounting seat; 30. extension section; 300. mounting groove; 31. guide rail; 310. limiting groove; 32. contact finger spring; 4. drive assembly; 40. power source; 41. connecting seat; 410. seat body; 4100. slide groove; 4101. protrusion; 4102. assembly groove; 411. connecting block; 4110. connecting part; 4111. limiting flange; 412. limiting ring; 413. force sensor; 42. clutch; 4 3. Push-pull rod; 44. Elastic element; 45. Transmission element; 450. Hinge shaft; 5. Third mounting base; 6. Linear actuator; 60. Limiting plate; 7. Buffer; 8. Moving contact; 80. Moving main contact; 800. Distal end of moving main contact; 81. Moving arc contact; 810. Distal end of moving arc contact; 811. Proximal end of moving arc contact; 9. Stationary contact; 90. Stationary main contact; 900. Proximal end of stationary main contact; 901. Distal end of stationary main contact; 91. Stationary arc contact; 910. Proximal end of stationary arc contact. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0037] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] This embodiment provides a running-in inspection device for circuit breaker contacts, such as... Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the break-in testing device includes a base 1, a first mounting base 2, a second mounting base 3, and a drive assembly 4. The first mounting base 2, the second mounting base 3, and the drive assembly 4 are all mounted on the base 1. The first mounting base 2 is used to position the stationary contact 9, and the second mounting base 3 has a mounting hole for sliding engagement with the moving contact 8. That is, when using this break-in testing device, the stationary contact 9 can be manually grasped and placed on the first mounting base 2, and the moving contact 8 can be grasped and inserted into the mounting hole. The drive assembly 4 includes a power source 40 and a connecting seat 41 located at the output end of the power source 40. The connecting seat 41 has a connecting portion 4110 for connecting with the moving arc contact 81 in the moving contact 8. The connecting seat 41 is configured to reciprocate along a first direction under the drive of the power source 40, thereby causing the moving contact 8 to slide in and out relative to the stationary contact 9. The first direction is as follows: Figure 2 As indicated by the middle arrow P, the first direction refers to the direction from the second mounting base 3 to the first mounting base 2, that is, the direction from the moving contact 8 to the stationary contact 9.

[0041] Specifically, when the power source 40 drives the connecting seat 41 to move along the first direction, the connecting seat 41 can drive the entire moving contact 8 to move along the first direction through the moving arc contact 81, thereby allowing the moving main contact 80 in the moving contact 8 to extend into the stationary main contact 90 in the stationary contact 9, and simultaneously allowing the stationary arc contact 91 in the stationary contact 9 to extend into the moving arc contact 81 in the moving contact 8. When the connecting seat 41 moves in the opposite direction along the first direction, the connecting seat 41 can drive the entire moving contact 8 to retract relative to the stationary contact 9 through the moving arc contact 81.

[0042] By setting the first mounting base 2 to position the stationary contact 9, the stationary contact 9 can be simulated as being fixed in place during actual operation. By setting the second mounting base 3 and forming a mounting hole, and setting a drive mechanism, the moving contact 8 can be simulated as being able to slide in and out relative to the stationary contact 9 during actual operation. Therefore, this break-in and inspection device can be used to break in and inspect the moving contact 8 and the stationary contact 9 before formal assembly. This not only confirms whether the two can work properly together, but also eliminates potential problems with proper mating through break-in, thereby greatly improving the product's pass rate and reliability, and significantly reducing subsequent verification costs.

[0043] It should also be noted that in this embodiment, the first mounting base 2 adopts a V-shaped positioning clamp design commonly used in the mechanical field. After the stationary contact 9 is placed on the first mounting base 2, bolts are used to lock and fix the stationary contact 9 to the first mounting base 2. Alternatively, in other optional embodiments, a pressure cylinder, positioning clamp, etc., can be used to press and fix the stationary contact 9 to the first mounting base 2 from top to bottom.

[0044] In this embodiment, the drive assembly 4 is further designed to allow the moving contact 8 to extend into the stationary contact 9 at a greater moving speed, thereby achieving a better break-in effect. Specifically, the break-in inspection device in this embodiment also includes a third mounting base 5 disposed on the base 1, and the drive assembly 4 also includes a clutch 42, a push-pull rod 43, and an elastic element 44. The clutch 42 is disposed at the output end of the power source 40 and has an engaged state and a disengaged state. One end of the push-pull rod 43 is connected to the clutch 42, and the other end is connected to the connecting seat 41. The elastic element 44 is disposed between the third mounting base 5 and the connecting seat 41. When the clutch 42 is engaged, the push-pull rod 43 can transmit the output power of the power source 40 to the connecting seat 41, thereby driving the connecting seat 41 to move in the reverse direction in the first direction and compressing the elastic element 44 to a predetermined compression stroke. Thus, the elastic element 44 can be compressed during the reverse movement of the connecting seat 41 in the first direction, allowing the elastic element 44 to store energy. When the elastic element 44 is in a predetermined compression stroke and the clutch 42 is disengaged, it can drive the connecting seat 41 to move in a first direction through elastic deformation. The predetermined compression stroke is determined according to the specifications of the circuit breaker and the elastic modulus of the elastic element.

[0045] Furthermore, the drive assembly 4 in this embodiment also includes a transmission member 45 disposed at the output end of the clutch 42. When the clutch 42 is engaged, the transmission member 45 can rotate around a set axis driven by the power source 40. One end of the push-pull rod 43 is movably hinged to the transmission member 45 via a connecting shaft, and the other end of the push-pull rod 43 is movably hinged to the connecting seat 41. The axis of the connecting shaft is parallel to and spaced from the set axis. Specifically, in this embodiment, the transmission member 45 is a disc-shaped transmission plate. The output end of the clutch 42 is fixedly connected to the center of the transmission plate, so that when the clutch 42 is engaged, the output power of the power source 40 can be transmitted to the transmission plate, thereby driving the transmission plate to rotate around its own axis. Therefore, the set axis mentioned in this embodiment is the central axis of the transmission plate. A hinge hole is provided near the edge of the transmission plate, and a hinge shaft 450 is provided through one end of the push-pull rod 43. The hinge shaft 450 passes through the hinge hole to movably hinge one end of the push-pull rod 43 to the transmission plate. When the clutch 42 is engaged, the power source 40 drives the transmission component 45 to rotate via the clutch 42. The transmission component 45 drives the push-pull rod 43 to move via the hinge shaft 450. The push-pull rod 43 pulls the connecting seat 41 to move in the opposite direction in the first direction. While pulling the moving contact 8 to move in the first direction, the connecting seat 41 also compresses the elastic element 44. After the moving stroke of the connecting seat 41 reaches the required stroke, the clutch 42 is switched to the disengaged state. The elastic element 44 will push the connecting seat 41 through elastic deformation, thereby driving the connecting seat 41 and the moving contact 8 to move rapidly in the first direction, so that the moving contact 8 can extend into the stationary contact 9 at a relatively fast moving speed.

[0046] In practical applications, the required moving speed of the moving contact 8 can be adjusted by selecting elastic elements 44 with different elastic moduli and designing different travel strokes for the connecting base 41, depending on the specifications of the circuit breaker contacts. Generally, the opening and closing speed of the moving contact 8 relative to the stationary contact 9 when it extends in and retracts is controlled between 0.5 m / s and 6.5 m / s.

[0047] It is easy to understand that the transmission component 45, push-pull rod 43 and connecting seat 41 in this embodiment constitute a cam mechanism. In other optional embodiments, the transmission component 45 may not be provided. Instead, a belt drive mechanism or a gear and rack drive mechanism may be provided between the clutch 42 and the push-pull rod 43, as long as the driving power of the power source 40 can be transmitted to the push-pull rod 43 and drive the push-pull rod 43 to move a predetermined distance in the opposite direction of the first direction.

[0048] As mentioned above, the break-in testing device provided in this embodiment can also determine whether the moving contact 8 and the stationary contact 9 can properly connect by the insertion and withdrawal of the moving contact 8 relative to the stationary contact 9. Furthermore, in order to improve the accuracy of the judgment, combined with Figure 3 and Figure 4 As shown, the break-in inspection device provided in this embodiment also includes a force sensor 413 disposed on the connecting seat 41. One side of the force sensor 413 is connected to the connecting seat 41, and the other side of the force sensor 413 is used to connect to the moving contact 81 to measure the force between the moving contact 8 and the stationary contact 9 during the sliding insertion and withdrawal process. In this way, during the insertion and withdrawal process of the moving contact 8 relative to the stationary contact 9, due to the break-in effect between the two, the force sensor 413 can detect the change in tension. For example, during the process of the connecting seat 41 sliding along the first direction and pushing the moving contact 8 to move along the first direction, when the moving contact 8 is not breaking in with the stationary contact 9, the force sensor 413 detects the pushing force F of the connecting seat 41 on the moving contact 8 along the first direction; when the moving contact 8 and the stationary contact 9 are breaking in, the force sensor 413 detects the pushing force F+f of the connecting seat 41 on the moving contact 8 along the first direction. It is easy to understand that a value of f that is too large or too small does not meet product requirements. Therefore, the value of f can be used to determine whether the moving contact 8 and the stationary contact 9 can properly connect. On the other hand, the break-in test device provided in this embodiment is generally set to drive the moving contact 8 to reciprocate two hundred times (twenty times per minute, for ten minutes) through a power source 40. As the break-in test proceeds, the moving contact 8 and the stationary contact 9 will wear away the uneven parts of their surfaces through the break-in process, which will inevitably lead to a decrease in the value of f. The change in the value of f can be used to plot a force change curve, and the reliability of the moving contact 8 and the stationary contact 9 can be further judged and verified by the change in the value of f.

[0049] In this embodiment, the force sensor 413 is assembled using the following structural design: the connecting base 41 includes a base body 410, a connecting block 411, and a limiting ring 412. The base body 410 has an assembly groove 4102. One end of the connecting block 411 has the connecting portion 4110, and the other end has a limiting flange 4111 extending into the assembly groove 4102. The limiting ring 412 is detachably mounted on the base body 410 and engages with the limiting flange 4111 to prevent the connecting block 411 from detaching from the base body 410. The force sensor 413 is disposed within the assembly groove 4102, and both sides of the force sensor 413 are fixedly connected to the bottom wall of the assembly groove 4102 and the connecting block 411, respectively.

[0050] When assembling the force sensor 413, first place the force sensor 413 into the assembly groove 4102, and use bolts or adhesive to fix one side of the force sensor 413 to the bottom wall of the assembly groove 4102. Then, extend the end of the connecting block 411 containing the limiting flange 4111 into the assembly groove 4102, and fix the other end of the force sensor 413 to the connecting block 411. Next, fix the limiting ring 412 to the base 410 with screws. The limiting ring 412 cooperates with the limiting flange 4111 to prevent the connecting block 411 from detaching from the base 410. In this way, when the connecting base 41 pushes or pulls the moving contact 8, the force sensor 413 can detect the force between the two.

[0051] Combination Figure 3 and Figure 5 As shown, to ensure the stability of the moving contact 8 during the insertion and withdrawal of the stationary contact 9, and to prevent excessive deviation of the central axis between the moving contact 8 and the stationary contact 9, the running-in inspection device in this embodiment further includes a guide rail 31 disposed on the base 1. The guide rail 31 has limiting grooves 310 on both sides along the first direction. The connecting seat 41 is provided with a sliding groove 4100 adapted to the guide rail 31 and a protrusion 4101 adapted to the limiting groove 310. The sliding groove 4100 slides in conjunction with the guide rail 31, and the protrusion 4101 slides in conjunction with the limiting groove 310. By providing the aforementioned structures such as the guide rail 31, limiting groove 310, sliding groove 4100, and protrusion 4101, the stable sliding of the connecting seat 41 along the first direction and in the opposite direction can be ensured, thereby ensuring the movement stability of the moving contact 8.

[0052] In addition, such as Figure 1As shown, to prevent the connecting seat 41 from sliding excessively along the first direction, the break-in inspection device provided in this embodiment further includes a buffer 7 disposed on the base 1. The buffer 7 is spaced apart from the connecting seat 41, and the buffer 7 is used to limit the travel of the connecting seat 41 during its movement along the first direction. Further, in this embodiment, the second mounting base 3 has an extension section 30 extending towards the third mounting base 5. The extension section 30 has a mounting groove 300 extending along the first direction. The connecting seat 41 is slidably disposed on the extension section 30, and the buffer 7 is positioned on the extension section 30.

[0053] The break-in test device also includes a linear drive 6 and a limiting plate 60 connected to the linear drive 6. Both the linear drive 6 and the limiting plate 60 are mounted on the base 1. The connecting seat 41 is provided with a limiting part for cooperating with the limiting plate 60. The limiting plate 60 can push the connecting seat 41 to move in the opposite direction in the first direction by applying pressure to the limiting part under the drive of the linear drive 6.

[0054] To better simulate the actual use of the circuit breaker, an annular groove is provided on the inner wall of the mounting hole in this embodiment. The break-in test device also includes a contact finger spring 32 disposed in the annular groove. The contact finger spring 32 is used to surround and abut against the outside of the moving contact 8.

[0055] Combination Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the operation process of running-in and inspecting the moving contact 8 and stationary contact 9 using this running-in and inspection device is described below:

[0056] Before the formal start of the break-in test, the linear actuator 6 drives the limiting plate 60 to move in the opposite direction along the first direction. The limiting plate 60 pushes the connecting seat 41 to move in the opposite direction along the first direction to provide sufficient space for the assembly of the moving contact 8. Then, the stationary contact 9 and the moving contact 8 are respectively installed on the first mounting seat 2 and the second mounting seat 3. The stationary contact 9 is then locked and fixed to the first mounting seat 2 with bolts, and the moving contact 8 is movably hinged to the connecting part 4110 on the connecting seat 41. The linear actuator 6 then drives the limiting plate 60 to move along the first direction and return to its original position to avoid interference between the limiting plate 60 and the connecting seat 41. For ease of description, in this embodiment, the two ends of the moving contact 8 and the two ends of the stationary contact 9, arranged in the first direction, are referred to as the proximal end and the distal end, respectively. Specifically, the stationary main contact distal end 901 in the stationary contact 9 is locked and fixed to the first mounting base 2 by screws. The stationary main contact proximal end 900 is used to mate and run with the moving main contact distal end 800. The stationary arc contact proximal end 910 is used to mate and run with the moving arc contact distal end 810. The moving arc contact proximal end 811 is used to movably hinge with the connecting part 4110 of the connecting base 41.

[0057] Then the formal break-in test operation begins. The power source 40 is controlled to work. The power source 40 drives the transmission component 45 to rotate through the clutch 42 which is in the engaged state. The transmission component 45 drives the push-pull rod 43 to move. The push-pull rod 43 drives the connecting seat 41 to slide in the opposite direction of the first direction. During this process, the elastic element 44 is compressed. The moving contact 8 moves in the opposite direction of the first direction to increase the distance between the moving contact 8 and the stationary contact 9, so that the moving contact 8 can have a sufficient acceleration process in the future.

[0058] When the clutch 42 is switched to the disengaged state, the elastic element 44 releases energy and drives the connecting seat 41 to slide along the first direction through elastic deformation. Under the push of the connecting seat 41, the moving contact 8 gradually accelerates towards the stationary contact 9 along the first direction until the moving contact 8 extends into the stationary contact 9, realizing the running-in and docking of the moving contact 8 and the stationary contact 9. Afterwards, by repeatedly controlling the operation of the power source 40 and controlling the switching state of the clutch 42, the moving contact 8 and the stationary contact 9 are repeatedly run-in.

[0059] The break-in testing device provided in this application can automatically control the opening and closing of the moving contact 8 and the stationary contact 9 by controlling the power source 40, thus achieving pre-break-in and inspection before formal assembly. This break-in testing device can adapt to circuit breakers of different voltage specifications, such as 252kV, 300kV, and 500kV, by adjusting the drive stroke of the connecting seat 41 or replacing the elastic element 44 with a different elastic modulus. During the break-in testing process, it can monitor and record data such as the axial force of the moving contact 8 relative to the stationary contact 9 to determine if any abnormalities exist.

[0060] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A running-in inspection device for circuit breaker contacts, characterized in that, The running-in testing device includes a base (1), a first mounting base (2), a second mounting base (3), and a drive assembly (4). The first mounting base (2), the second mounting base (3), and the drive assembly (4) are all located on the base (1). The first mounting base (2) is used to position the stationary contact (9), and the second mounting base (3) is provided with a mounting hole for sliding cooperation with the moving contact (8). The drive assembly (4) includes a power source (40) and a connector (41) disposed at the output end of the power source (40). The connector (41) is provided with a connecting part (4110) for connecting with the moving arc contact (81) in the moving contact (8). The connector (41) is configured to reciprocate along a first direction under the drive of the power source (40) so as to drive the moving contact (8) to slide into and out relative to the stationary contact (9). The break-in testing device further includes a third mounting base (5) disposed on the base (1), and the drive assembly (4) further includes: The clutch (42) is located at the output end of the power source (40) and has an engaged state and an disengaged state; A push-pull rod (43), one end of which is connected to the clutch (42) and the other end of which is connected to the connecting seat (41); and, An elastic element (44) is disposed between the third mounting base (5) and the connecting base (41); When the clutch (42) is in the engaged state, the push-pull rod (43) can transmit the output power of the power source (40) to the connecting seat (41) so as to drive the connecting seat (41) to move in the opposite direction in the first direction and compress the elastic element (44) to a predetermined compression stroke. The elastic element (44) can drive the connecting seat (41) to move in a first direction by elastic deformation when the predetermined compression stroke is and the clutch (42) is in the disengaged state; The drive assembly (4) also includes a transmission member (45) disposed at the output end of the clutch (42), the transmission member (45) being able to rotate around a set axis by the power source (40) when the clutch (42) is in the engaged state. One end of the push-pull rod (43) is movably hinged to the transmission component (45) via a connecting shaft, and the axis of the connecting shaft is parallel to and spaced from the set axis. The other end of the push-pull rod (43) is movably hinged to the connecting seat (41). The break-in test device also includes a linear drive (6) and a limiting plate (60) connected to the linear drive (6), both of which are mounted on the base (1). The connecting seat (41) is provided with a limiting part for cooperating with the limiting plate (60). The limiting plate (60) can push the connecting seat (41) to move in the opposite direction in the first direction by applying pressure to the limiting part under the drive of the linear driver (6).

2. The break-in testing device as described in claim 1, characterized in that, The break-in testing device also includes a guide rail (31) disposed on the base (1). The guide rail (31) is provided with limiting grooves (310) on both sides along the first direction. The connecting seat (41) is provided with a sliding groove (4100) adapted to the guide rail (31) and a protrusion (4101) adapted to the limiting groove (310). The sliding groove (4100) slides with the guide rail (31), and the protrusion (4101) slides with the limiting groove (310).

3. The break-in inspection device as described in claim 1, characterized in that, The break-in test device also includes a buffer (7) disposed on the base (1), the buffer (7) being spaced apart from the connecting seat (41), and the buffer (7) being used to limit the travel of the connecting seat (41) during the movement of the connecting seat (41) in the first direction.

4. The break-in inspection device as described in claim 3, characterized in that, The second mounting base (3) has an extension section (30) extending toward the third mounting base (5), the extension section (30) has a mounting groove (300) extending in a first direction, the connecting base (41) is slidably disposed on the extension section (30), and the buffer (7) is positioned on the extension section (30).

5. The break-in inspection device as described in any one of claims 1 to 4, characterized in that, The running-in inspection device also includes a force sensor (413) disposed on the connecting seat (41). One side of the force sensor (413) is connected to the connecting seat (41), and the other side of the force sensor (413) is used to connect to the moving contact (81) to measure the force between the moving contact (8) and the stationary contact (9) during the sliding insertion and withdrawal process.

6. The break-in inspection device as described in claim 5, characterized in that, The connector (41) includes: The base (410) has an assembly groove (4102). A connecting block (411) having the connecting portion (4110) at one end and a limiting flange (4111) at the other end, the limiting flange (4111) extending into the assembly groove (4102); and, A limiting ring (412) is detachably disposed on the seat (410), the limiting ring (412) being used to cooperate with a limiting flange (4111) to restrict the connecting block (411) from disengaging from the seat (410). The force sensor (413) is disposed in the assembly groove (4102), and the two sides of the force sensor (413) are respectively fixed to the bottom wall of the assembly groove (4102) and the connecting block (411).

7. The break-in inspection device as described in any one of claims 1 to 4, characterized in that, The inner wall of the mounting hole is provided with an annular groove, and the running-in inspection device also includes a touch finger spring disposed in the annular groove, the touch finger spring being used to surround and abut against the outside of the moving contact (8).

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