Vacuum Circuit Breaker Assembly Positioning Fixture and Assembly Positioning Method

Abstract

This application relates to a vacuum circuit breaker assembly positioning fixture and an assembly positioning method. The vacuum circuit breaker assembly positioning fixture includes a fixture plate and three-phase positioning posts. The fixture plate is provided with three-phase positioning holes, which include moving contact three-phase positioning holes and auxiliary three-phase positioning holes. Auxiliary three-phase positioning holes are circumferentially provided in each phase of the moving contact three-phase positioning holes. The three-phase positioning posts include static-side three-phase positioning posts, three-phase connection posts, and moving-side three-phase positioning posts arranged in sequence. The three-phase connection posts are located in the moving contact three-phase positioning holes. The static-side three-phase positioning posts and the three-phase connection posts are respectively used for the assembly positioning of the static-side sub-assembly and the moving-side sub-assembly of the vacuum circuit breaker. The moving contact three-phase positioning holes cooperate with the auxiliary three-phase positioning holes for the assembly positioning of the moving contact and the vacuum interrupter, so as to meet the auxiliary positioning requirements of the complete assembly process and realize the standardization of the assembly process.

Description

Technical Field

[0001] This application relates to the technical field of vacuum circuit breakers, and particularly to an assembly positioning fixture and an assembly positioning method for a vacuum circuit breaker. Background Art

[0002] As a key component of GIS, the main function of a vacuum circuit breaker is to disconnect or switch the current in a transmission line to protect the normal operation and safety of the power system and maintain the interconnection and penetration of the load power sources in the power system. The vacuum circuit breaker has strict identity requirements for three-phase opening and closing, that is, there are standard requirements for indicators such as three-phase opening and closing time and three-phase loop resistance. Therefore, during the assembly process of the vacuum circuit breaker, it is necessary to strictly control the installation accuracy between the moving contact, the static contact, and the various components connected thereto. The installation dimensions between different components are different, and various types, sizes, and shapes of positioning fixtures are required during the assembly process of a vacuum circuit breaker. The types of positioning fixtures are numerous and the functions are single, resulting in the need to produce a large number of positioning fixtures in production, increasing a large amount of fixture design, production, warehousing, and management costs. Summary of the Invention

[0003] Based on this, in view of the problem that the types of assembly positioning fixtures for vacuum circuit breakers are numerous and the functions are single, it is necessary to provide an assembly positioning fixture and an assembly positioning method for a vacuum circuit breaker.

[0004] An assembly positioning fixture for a vacuum circuit breaker is used for the assembly positioning of the three-phase static-side support conductor and the three-phase static-side insulation support seat of the vacuum circuit breaker, the assembly positioning of the three-phase moving contact and the vacuum interrupter, and the assembly positioning of the three-phase moving-side support conductor and the three-phase moving-side insulation support seat. The assembly positioning fixture for the vacuum circuit breaker includes:

[0005] A fixture plate, the fixture plate includes a first working surface and a second working surface opposite to the first working surface. The fixture plate is provided with three-phase positioning holes penetrating the first working surface and the second working surface. The three-phase positioning holes include moving-contact three-phase positioning holes and auxiliary three-phase positioning holes. The auxiliary three-phase positioning holes are circumferentially provided on each phase of the moving-contact three-phase positioning holes.

[0006] Three-phase positioning columns, the three-phase positioning columns include three static-side three-phase positioning columns, three-phase connecting columns, and moving-side three-phase positioning columns sequentially arranged along the axial direction of the three-phase positioning columns. The static-side three-phase positioning columns are located on one side of the first working surface, the three-phase connecting columns are located in the moving-contact three-phase positioning holes, and the moving-side three-phase positioning columns are located on one side of the second working surface.

[0007] In one embodiment, the static-side three-phase positioning columns, the three-phase connecting columns, the moving-side three-phase positioning columns, and the moving-contact three-phase positioning holes are all coaxially arranged; the first working surface is parallel to the second working surface.

[0008] In one embodiment, the vacuum circuit breaker assembly positioning jig further includes a quick-change structure, which includes a first mating structure and a second mating structure. The first mating structure is disposed on the column surface of the three-phase connection column, and the second mating structure is disposed on the wall of the hole of the moving contact three-phase positioning hole. Along the axial direction of the moving contact three-phase positioning hole, the quick-change structure has a first position and a second position. When the quick-change structure is in the first position, the first mating structure and the second mating structure are separated from each other. When the quick-change structure is in the second position, the first mating structure and the second mating structure are fixed to each other.

[0009] In one embodiment, the first mating structure includes a positioning groove, which includes a first positioning groove and a second positioning groove that are perpendicular to each other and communicate with each other. The first positioning groove is parallel to the central axis, the first positioning groove has an open end, and the second positioning groove has a closed end. The second mating structure includes a convex block. When the quick-change structure is in the first position, the convex block is separated from the positioning groove. When the quick-change structure is in the second position, the convex block slides through the open end to the closed end and is clamped in the positioning groove.

[0010] In one embodiment, the quick-change structure further includes a positioning mechanism, which includes a spring plunger ball and a mating surface. The spring plunger ball is installed in the second positioning groove, and the convex block is provided with the mating surface. When the quick-change structure is in the second position, the spring plunger ball is positioned and abutted against the mating surface.

[0011] In one embodiment, a blind hole is formed in the second positioning groove, the spring plunger ball is installed in the blind hole, and the mating surface is provided on the end face of the convex block facing away from the wall of the hole of the moving contact three-phase positioning hole.

[0012] In one embodiment, the cross section of the mating surface is arc-shaped or V-shaped.

[0013] In one embodiment, the vacuum circuit breaker assembly positioning jig further includes a handle. An installation groove communicating with the first working surface and the second working surface is formed in the jig plate. The handle is placed in the installation groove, and installation posts are provided on the wall of the installation groove. The handle is connected to the installation posts and rotates around the installation posts.

[0014] In one embodiment, an annular counterbore is provided circumferentially around each moving contact three-phase positioning hole, and the auxiliary three-phase positioning hole is formed in the annular counterbore.

[0015] The present application also provides a method for assembling and positioning a vacuum circuit breaker, which is realized by the above-mentioned jig for assembling and positioning a vacuum circuit breaker, and includes:

[0016] Fix the lower end of the three-phase static-side insulating support seat to the lower base plate, and fit the lower ports of the three-phase static-side support conductors onto the upper ends of the three-phase static-side insulating support seats. Then insert the static-side three-phase positioning posts of the jig for assembling and positioning a vacuum circuit breaker into the upper ends of the three-phase static-side support conductors until the first working surface abuts against and positions the upper ends of the three-phase static-side support conductors, and connect the lower ports of the three-phase static-side support conductors and the upper ends of the three-phase static-side insulating support seats;

[0017] Socket the lower ends of the three-phase moving contacts onto the vacuum interrupters, and insert the moving-contact three-phase positioning holes of the jig for assembling and positioning a vacuum circuit breaker into the upper ends of the three-phase moving contacts, so that the auxiliary three-phase positioning holes correspond to the third positioning holes of the three-phase moving contacts one by one. Use connecting pieces to insert into the auxiliary three-phase positioning holes and the third positioning holes, and connect the lower ends of the three-phase moving contacts and the vacuum interrupters;

[0018] Fix the upper ends of the three-phase moving-side insulating support seats to the upper base plate, and fit the upper ports of the three-phase moving-side support conductors onto the lower ends of the three-phase moving-side insulating support seats. Then insert the moving-side three-phase positioning posts of the jig for assembling and positioning a vacuum circuit breaker into the lower ends of the three-phase moving-side support conductors until the second working surface abuts against and positions the lower ends of the three-phase moving-side support conductors, and connect the upper ports of the three-phase moving-side support conductors and the lower ends of the three-phase moving-side insulating support seats.

[0019] In the technical solution of the present application, the static-side three-phase positioning posts and the three-phase connection posts of the jig for assembling and positioning a vacuum circuit breaker are respectively located on the side of the first working surface and the side of the second working surface. By setting different specifications and dimensions, the static-side three-phase positioning posts and the three-phase connection posts can be respectively used for the assembly positioning of the three-phase static-side support conductors and the three-phase static-side insulating support seats, and the assembly positioning of the three-phase moving-side support conductors and the three-phase moving-side insulating support seats. The moving-contact three-phase positioning holes cooperate with the auxiliary three-phase positioning holes to be used for the assembly positioning of the three-phase moving contacts and the vacuum interrupters, so that the jig for assembling and positioning a vacuum circuit breaker can meet the auxiliary positioning requirements in multiple processes of the vacuum circuit breaker assembly process, effectively simplifies the types of the vacuum circuit breaker auxiliary positioning devices and realizes a multi-functional jig, which is beneficial to the standardization of the assembly process. Brief Description of the Drawings

[0020] Figure 1 It is an isometric structural schematic diagram of an embodiment of the jig for assembling and positioning a vacuum circuit breaker and the assembly positioning method of the present application.

[0021] Figure 2Schematic structural diagram of the three-phase positioning posts in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0022] Figure 3 Top view structural diagram of the jig plate in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0023] Figure 4 For Figure 3 Partial enlarged structural diagram at location A in

[0024] Figure 5 Bottom view structural diagram of the jig plate in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0025] Figure 6 Schematic structural diagram of the handle installation in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0026] Figure 7 For Figure 6 Cross-sectional structural diagram at B-B in

[0027] Figure 8 Schematic assembly positioning diagram of the three-phase static-side support conductors and the three-phase static-side insulation support seats in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0028] Figure 9 Schematic assembly positioning diagram of the three-phase moving contacts and the vacuum interrupters in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0029] Figure 10 Schematic assembly positioning diagram of the three-phase moving-side support conductors and the three-phase moving-side insulation support seats in an embodiment of the assembly positioning jig and assembly positioning method of the present application for a vacuum circuit breaker.

[0030] Explanation of the component numbers in the drawings:

[0031] 1000. Vacuum circuit breaker assembly positioning jig; 100. Jig plate; 110. First working surface; 120. Second working surface; 130. Three-phase positioning holes; 131. Moving contact three-phase positioning holes; 132. Auxiliary three-phase positioning holes; 200. Three-phase positioning posts; 210. Static-side three-phase positioning posts; 220. Three-phase connection posts; 230. Moving-side three-phase positioning posts; 300. Quick-change structure; 310. First mating structure; 311. Positioning grooves; 3111. First positioning groove; 3112. Second positioning groove; 320. Second mating structure; 321. Protrusions; 330. Positioning mechanism; 331. Spring plunger ball; 332. Mating surface; 400. Handle; 410. Installation groove; 420. Installation post; 430. Finger slot; 440. Annular countersunk head groove; 501. Lower base plate; 502. First fastener; 503. Three-phase static-side insulation support seat; 504. Three-phase static-side support conductor; 5041. Operation hole; 505. First connecting piece; 506. Second fastener; 507. Vacuum interrupter; 508. Buffer; 509. Three-phase static contacts; 510. Three-phase moving contacts; 5101. Third positioning hole; 511. Third fastener; 512. Upper base plate; 513. Three-phase moving-side insulation support seat; 514. Three-phase moving-side support conductor. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, 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, and thus should not be construed as a limitation to the present application.

[0034] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if terms such as "mounted", "connected", "coupled", "fixed", etc. appear, these terms 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 communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0038] As described in the background art, vacuum circuit breakers have high requirements for assembly accuracy during the assembly process. Specifically, it is required that each three-phase component, such as the three-phase moving contact 510, the three-phase moving-side support conductor 514, the three-phase moving-side insulating support base 513, the vacuum interrupter 507, the three-phase static-side support conductor 504, and the three-phase static-side insulating support base 503, are installed coaxially with the same phase. The three phases include phase A, phase B, and phase C. Installing phase A to phase A, phase B to phase B, and phase C to phase C is called the same-phase installation. In addition, the center axis spacing between each phase of the three-phase components is equal, the parallelism of the center axes is consistent, and the top surface installation height and the top surface parallelism in the horizontal direction are consistent. For example, the center axis spacing between the phase A moving-side support conductor, the phase B moving-side support conductor, and the phase C moving-side support conductor in the three-phase moving-side support conductor 514 needs to be equal, the parallelism of the center axes needs to be consistent, and both the top surface installation height and the top surface parallelism need to reach consistency to meet the requirements of assembly accuracy. Therefore, auxiliary positioning is required during the installation process of the three-phase moving-side support conductor 514. Since the sizes and shapes of each three-phase component are different, a wide variety of auxiliary jigs with single functions are required during the assembly process. Due to the similar shapes of the positioning jigs, errors are likely to occur during tooling taking, resulting in a chaotic assembly process, which in turn affects the qualified rate of the finished product.

[0039] Referring to Figures 1 to 3 and Figure 5 , Figure 1 FIG. shows an isometric structural schematic diagram of an embodiment of the assembly positioning jig 1000 and the assembly positioning method of the present application, Figure 2 FIG. shows a structural schematic diagram of the three-phase positioning post 200, Figure 3 FIG. shows a top view structural schematic diagram of the jig plate 100, Figure 5The figure shows a bottom view structural schematic diagram of the fixture plate 100. During the assembly process of the vacuum circuit breaker, auxiliary positioning is mainly required in three steps to meet the assembly accuracy requirements. They are the assembly positioning of the three-phase static-side support conductor 504 and the three-phase static-side insulation support base 503, the assembly positioning of the three-phase moving contact 510 and the vacuum interrupter 507, and the assembly positioning of the three-phase moving-side support conductor 514 and the three-phase moving-side insulation support base 513. The present application proposes a vacuum circuit breaker assembly positioning fixture 1000 for auxiliary positioning in the above three steps. The vacuum circuit breaker assembly positioning fixture 1000 includes a fixture plate 100 and three-phase positioning columns 200. The fixture plate 100 includes a first working surface 110 and a second working surface 120 facing away from the first working surface 110. The fixture plate 100 is provided with three-phase positioning holes 130 penetrating through the first working surface 110 and the second working surface 120. The three-phase positioning holes 130 include moving contact three-phase positioning holes 131 and auxiliary three-phase positioning holes 132. Auxiliary three-phase positioning holes 132 are circumferentially arranged in each phase of the moving contact three-phase positioning holes 131. Each phase of the auxiliary three-phase positioning holes 132 includes a plurality of uniformly distributed small holes. The three-phase positioning columns 200 include static-side three-phase positioning columns 210, three-phase connection columns 220, and moving-side three-phase positioning columns 230 arranged in sequence along the axial direction of the three-phase positioning columns 200. The static-side three-phase positioning columns 210 are located on one side of the first working surface 110, the three-phase connection columns 220 are located in the moving contact three-phase positioning holes 131, and the moving-side three-phase positioning columns 230 are located on one side of the second working surface 120.

[0040] The static-side three-phase positioning columns 210 and the three-phase connection columns 220 of the vacuum circuit breaker assembly positioning fixture 1000 are respectively located on the side of the first working surface 110 and the side of the second working surface 120. By setting different specifications and dimensions, the static-side three-phase positioning columns 210 and the three-phase connection columns 220 can be respectively used for the assembly positioning of the three-phase static-side support conductor 504 and the three-phase static-side insulation support base 503, and the assembly positioning of the three-phase moving-side support conductor 514 and the three-phase moving-side insulation support base 513. The moving contact three-phase positioning holes 131 cooperating with the auxiliary three-phase positioning holes 132 can be used for the assembly positioning of the three-phase moving contact 510 and the vacuum interrupter 507, so that the vacuum circuit breaker assembly positioning fixture 1000 can meet the auxiliary positioning requirements in multiple processes during the vacuum circuit breaker assembly process, effectively simplifies the types of vacuum circuit breaker auxiliary positioning devices and realizes a multi-functional fixture, which is beneficial to the standardization of the assembly process.

[0041] Specifically, the static-side three-phase positioning posts 210, the three-phase connection posts 220, the moving-side three-phase positioning posts 230, and the moving-contact three-phase positioning holes 131 are all coaxially arranged. The size of the static-side three-phase positioning posts 210 is determined according to the size of the three-phase static-side support conductors 504. Exemplarily, the center axis spacing of the static-side three-phase positioning posts 210 is equal to the center axis spacing of the three-phase static-side support conductors 504, and the parallelism of the center axes of the static-side three-phase positioning posts 210 is not greater than the parallelism of the center axes of the three-phase static-side support conductors 504. The size of the moving-contact three-phase positioning holes 131 is determined according to the size of the three-phase moving contacts 510. The size of the moving-side three-phase positioning posts 230 is determined according to the size of the three-phase moving-side support conductors 514 to ensure that each three-phase component is coaxially installed on a single phase, and the center axis spacing and the parallelism of the center axes between phases are equal. The first working surface 110 is parallel to the second working surface 120. The first working surface 110 and the second working surface 120 are respectively used to abut and position the end faces of the static-side support conductor and the moving-side support conductor to ensure that the top surface installation height and the top surface parallelism are consistent.

[0042] Further, referring to Figures 2 to 4 , Figure 3 shows a top view structural schematic diagram of the jig plate 100, Figure 4 showing Figure 3 a partial enlarged structural schematic diagram of the position A in

[0043] The vacuum circuit breaker assembly positioning jig 1000 further includes a quick-change structure 300. The quick-change structure 300 includes a first mating structure 310 and a second mating structure 320. The first mating structure 310 is disposed on the column surface of the three-phase connection post 220, and the second mating structure 320 is disposed on the wall of the hole passage of the moving-contact three-phase positioning hole 131. Along the circumferential direction around the central axis of the moving-contact three-phase positioning hole 131, the quick-change structure 300 has a first position and a second position. When the quick-change structure 300 is in the first position, the first mating structure 310 and the second mating structure 320 are separated from each other. When the quick-change structure 300 is in the second position, the first mating structure 310 and the second mating structure are fixed to each other. By rotating the three-phase positioning post 200 along the circumferential direction around the central axis of the moving-contact three-phase positioning hole 131, the quick-change structure 300 can be switched between the first position and the second position, realizing the quick disassembly and installation of the three-phase positioning post 200 on the jig plate 100, so that the vacuum circuit breaker assembly positioning jig 1000 can either use the three-phase positioning holes 130 alone for auxiliary positioning or cooperate with the three-phase positioning post 200 for use, meeting the auxiliary positioning requirements in each process during the vacuum circuit breaker assembly process.Exemplarily, the first mating structure 310 includes a positioning groove 311. The positioning groove 311 includes a first positioning groove 3111 and a second positioning groove 3112 that are perpendicular to each other and communicate. The first positioning groove 3111 is parallel to the central axis. The first positioning groove 3111 has an open end, and the second positioning groove 3112 has a closed end. The second mating structure 320 includes a bump 321. When the quick-change structure 300 is in the first position, the bump 321 is separated from the positioning groove 311. When the quick-change structure 300 is in the second position, the bump 321 slides through the open end to the closed end and is clamped in the positioning groove 311. Two or more quick-change structures 300 can be circumferentially symmetrically arranged along the pore passage of the moving contact three-phase positioning hole 131 to improve the connection reliability and connection strength.

[0044] Referring to Figure 2 and Figure 4 , the quick-change structure 300 further includes a positioning mechanism 330. The positioning mechanism 330 includes a spring plunger ball 331 and a mating surface 332. The spring plunger ball 331 is installed in the second positioning groove 3112, and the bump 321 is provided with the mating surface 332. When the quick-change structure 300 is in the second position, the spring plunger ball 331 is positioned and abutted against the mating surface 332. Exemplarily, a blind hole is provided in the second positioning groove 3112, and the spring plunger ball 331 is installed in the blind hole. The end surface of the bump 321 facing away from the pore wall of the moving contact three-phase positioning hole 131 is provided with the mating surface 332. The cross-sectional shape of the mating surface 332 is determined according to actual applications and is not specifically limited herein. Exemplarily, the cross-section of the mating surface 332 is arc-shaped or V-shaped, which can improve the feedback spring touch feeling and connection strength between the mating surface 332 and the spring plunger ball 331, and improve the connection reliability and operation convenience of the quick-change structure 300.

[0045] When the three-phase positioning post 200 is installed on the jig plate 100, align the open end of the first positioning groove 3111 with the bump 321, insert the lower end of the three-phase positioning post 200 into the three-phase positioning hole 130 on the jig plate 100 until the upper end surface of the bump 321 abuts against the upper end surface of the second positioning groove 3112, and then rotate the three-phase positioning post 200 to screw the bump 321 into the second positioning groove 3112. When the sound of the spring plunger ball 331 popping out and abutting against the middle groove of the bump 321 is heard, the connection is completed.

[0046] Further, referring to Figures 3 to 7 , Figure 5 shows a bottom view structural schematic diagram of the jig plate 100 of the three-phase positioning post 200, Figure 6 shows a mounting structural schematic diagram of the handle 400, Figure 7 shows Figure 6Cross-sectional view of the B-B section. The vacuum circuit breaker assembly positioning fixture 1000 further includes a handle 400. An installation groove 410 penetrating through the first working surface 110 and the second working surface 120 is formed on the fixture plate 100. The handle 400 is placed in the installation groove 410. Installation posts 420 are provided on the groove wall of the installation groove 410. The handle 400 is connected to the installation posts 420 and makes a rotational movement around the installation posts 420. With such a setting, the handle 400 is pivotally pin-connected to the installation posts 420, enabling the handle 400 to be pivotally lifted on both the first working surface 110 and the second working surface 120. For convenient operation, a finger slot 430 is provided in the middle of the installation groove 410. The finger slot 430 can be set in a circular arc shape, a rectangular shape or other shapes, and no specific limitation is made here. An annular counterbore 440 is provided circumferentially around each moving contact three-phase positioning hole 131, and the auxiliary three-phase positioning hole 132 is opened in the annular counterbore 440 to improve the machining accuracy of the auxiliary three-phase positioning hole 132 and reduce the machining difficulty.

[0047] Preferably, the material of the fixture plate 100 is a lightweight metal material. The material of the fixture plate 100 can be aluminum, aluminum alloy or other types of lightweight metal materials, and no specific limitation is made here. The material of the three-phase positioning post 200 is an insulating lightweight non-metallic material. Exemplarily, the material of the three-phase positioning post 200 is plastic or other types of insulating lightweight non-metallic materials, and no specific limitation is made here. With such a setting, the fixture is lightweight while ensuring the strength of the vacuum circuit breaker assembly positioning fixture 1000. To avoid damaging the parts of the vacuum circuit breaker during the assembly process, the material hardness of the three-phase positioning post 200 is less than that of the metal material. Exemplarily, the three-phase positioning post 200 is a nylon insulating post.

[0048] The basic structure of a vacuum circuit breaker includes a vacuum interrupter 507, a contact system, an operating mechanism, a bracket, etc. The contact system includes three-phase moving contacts 510 and three-phase static contacts 509. Their separation and contact can realize the opening and closing of the circuit breaker. The operating mechanism is used to perform the opening and closing actions of the circuit breaker. The bracket includes a housing, three-phase moving-side insulating support seats 513, and three-phase static-side insulating support seats 503, which are used to ensure the insulation requirements and airtightness requirements of the internal structure of the circuit breaker. The front end of the three-phase moving contacts 510 is connected to the operating mechanism through insulating pull rods. The three-phase moving contacts 510 are detachably electrically connected to the three-phase moving-side support conductors 514. The three-phase moving-side support conductors 514 are connected to external devices and are used to lead out opening and closing signals to external devices. Usually, a structure is adopted in which three-phase insulating pull rods and the front ends of the three-phase moving contacts 510 are slidably sleeved into the inner holes of the three-phase moving-side support conductors 514. The rear end of the three-phase moving contacts 510 is connected to three-phase copper conductors and is sleeved into the vacuum interrupter 507, and slides in the vacuum interrupter 507 to realize the contact and separation actions between the three-phase moving contacts 510 and the three-phase static contacts 509. The front end of the three-phase static contacts 509 is fixedly connected to the vacuum interrupter 507, and the rear end is fixedly connected to the three-phase static-side insulating support seats 503 through structures such as buffers 508 and three-phase static-side support conductors 504.

[0049] Refer to Figures 8 to 9 , Figure 8 shows an assembly positioning schematic diagram of the three-phase static-side support conductor 504 and the three-phase static-side insulating support seat 503, Figure 9 shows an assembly positioning schematic diagram of the assembly positioning of the three-phase moving contacts 510 and the vacuum interrupter 507, Figure 10 shows an assembly positioning schematic diagram of the assembly positioning of the three-phase moving-side support conductor 514 and the three-phase moving-side insulating support seat 513.

[0050] This application also proposes a method for assembling and positioning a vacuum circuit breaker, which is realized through the above-mentioned vacuum circuit breaker assembly positioning fixture 1000. The specific steps are as follows: The steps for assembling and positioning the three-phase static-side support conductor 504 and the three-phase static-side insulating support seat 503 are as follows:

[0051] Refer to Figure 8 , fix the lower end of the three-phase static-side insulating support seat 503 to the lower base plate 501 and sleeve the lower port of the three-phase static-side support conductor 504 on the upper end of the three-phase static-side insulating support seat 503. Insert the static-side three-phase positioning posts 210 of the vacuum circuit breaker assembly positioning fixture 1000 into the upper end of the three-phase static-side support conductor 504 until the first working surface 110 abuts against and positions the upper end of the three-phase static-side support conductor 504, and connect the lower port of the three-phase static-side support conductor 504 and the upper end of the three-phase static-side insulating support seat 503.

[0052] Specifically, the lower end of the three-phase static-side insulating support base 503 is fixed to the lower base plate 501 through the first fastener 502; operations are carried out through the operation holes 5041 opened on the static-side support conductor, and the three-phase static-side support conductor 504 and the three-phase static-side insulating support base 503 are fixed through the first connecting member 505 and the second fastener 506.

[0053] The assembly steps of the vacuum interrupter 507 and the buffer 508 are as follows:

[0054] Connect the three-phase static contacts 509 and the buffer 508 to the lower part of the vacuum interrupter 507 in sequence, so that the front ends of the three-phase static contacts 509 are fixedly connected to the vacuum interrupter 507 to form a vacuum interrupter assembly.

[0055] The assembly steps of the vacuum interrupter assembly and the static-side structure are as follows:

[0056] Place the vacuum interrupter assembly above the three-phase static-side support conductor 504, insert the conductor shafts at the lower ends of the three-phase static contacts 509 into the holes at the upper ends of the three-phase static-side support conductor 504, so that the three-phase static contacts 509, the buffer 508 are docked with the three-phase static-side support conductor 504, and fix them with threaded fasteners.

[0057] The assembly and positioning steps of the three-phase moving contact 510 and the vacuum interrupter 507 are as follows:

[0058] Refer to Figure 9 , insert and fix the connecting inner holes on the lower ends of the three-phase moving contacts 510 with the three-phase copper conductors protruding from the upper ends of the vacuum interrupter 507, and fix the three moving contacts of the three-phase moving contacts 510 in the same established direction, so that the lower ends of the three-phase moving contacts 510 are sleeved on the vacuum interrupter 507.

[0059] Sleeve the lower end of the three-phase moving contact 510 on the vacuum interrupter 507, and insert the three moving-contact three-phase positioning holes 131 of the vacuum circuit breaker assembly positioning jig 1000 into the upper ends of the three-phase moving contacts 510, so that the auxiliary three-phase positioning holes 132 and the third positioning holes 5101 of the three-phase moving contacts 510 correspond one by one, and use a connecting member to insert the auxiliary three-phase positioning holes 132 and the third positioning holes 5101 to connect the lower end of the three-phase moving contact 510 and the vacuum interrupter 507.

[0060] Specifically, connecting the lower end of the three-phase moving contact 510 and the vacuum interrupter 507 further includes:

[0061] Fix the three copper conductors of the three-phase copper conductor with fixtures such as a torque wrench, and use the third fastener 511 to fixedly connect the connecting inner hole at the lower end of the three-phase moving contact 510 and the central hole at the upper end of the three-phase copper conductor. Fix the three-phase insulating pull rod on the three-phase moving contact 510 through a buffer device to ensure the same-phase coaxiality between the three-phase moving contact 510 and the vacuum interrupter 507, and the flatness of the three upper convex platforms of the three-phase moving contact 510, the three-phase phase spacing, and the parallelism of the three-phase central axes are consistent, and prevent the three-phase moving contact 510 and the three-phase copper conductor from rotating during the assembly process. At the same time, fix the three connecting inner holes of the three moving contacts in the same established direction.

[0062] The assembly steps of the housing are as follows:

[0063] Align the bottom connection hole of the housing with the connection hole on the lower bottom plate 501, adjust the parallelism between the upper surface of the housing and the convex platform at the upper end of the three-phase moving contact 510, and fixedly connect the housing and the lower bottom plate 501 with threaded connectors to form a dropped housing.

[0064] The assembly and positioning steps of the three-phase moving-side support conductor 514 and the three-phase moving-side insulating support seat 513 are as follows:

[0065] Refer to Figure 10 , fix the upper end of the three-phase moving-side insulating support seat 513 to the upper bottom plate 512, and fit the upper port of the three-phase moving-side support conductor 514 onto the lower end of the three-phase moving-side insulating support seat 513. Insert the three moving-side three-phase positioning posts 230 of the vacuum circuit breaker assembly positioning jig 1000 into the lower end of the three-phase moving-side support conductor 514 until the second working surface 120 abuts and positions against the lower end of the three-phase moving-side support conductor 514, and connect the upper port of the three-phase moving-side support conductor 514 and the lower end of the three-phase moving-side insulating support seat 513 to form a moving-side sub-assembly.

[0066] The assembly steps of the operating mechanism:

[0067] Lift the moving-side sub-assembly above the dropped housing, insert the three-phase insulating pull rods into the three-phase moving-side support conductors 514 respectively, and connect the three-phase insulating pull rods and the operating mechanism box on the upper side of the upper bottom plate 512 through a buffer device.

[0068] It should be noted that if the vacuum circuit breaker assembly positioning jig can be smoothly removed after auxiliary positioning, the assembly accuracy meets the assembly requirements. If it cannot be smoothly removed, the assembly accuracy does not meet the assembly requirements, and re-assembly and positioning are required.

[0069] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0070] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A vacuum circuit breaker assembly positioning fixture is used for the assembly positioning of the three-phase static-side support conductors and the three-phase static-side insulating support seats of a vacuum circuit breaker, the assembly positioning of the three-phase moving contacts and the vacuum interrupters, and the assembly positioning of the three-phase moving-side support conductors and the three-phase moving-side insulating support seats. It is characterized in that The vacuum circuit breaker assembly positioning fixture includes: A fixture plate, which includes a first working surface and a second working surface facing away from the first working surface. The fixture plate is provided with three-phase positioning holes penetrating through the first working surface and the second working surface. The three-phase positioning holes include moving contact three-phase positioning holes and auxiliary three-phase positioning holes. The auxiliary three-phase positioning holes are circumferentially provided in each phase of the moving contact three-phase positioning holes; Three-phase positioning posts, which include static-side three-phase positioning posts, three-phase connection posts, and moving-side three-phase positioning posts arranged in sequence along the axial direction of the three-phase positioning posts. The static-side three-phase positioning posts are located on one side of the first working surface, the three-phase connection posts are located in the moving contact three-phase positioning holes, and the moving-side three-phase positioning posts are located on one side of the second working surface.

2. The vacuum circuit breaker assembly positioning jig according to claim 1, characterized in that, The static-side three-phase positioning posts, the three-phase connection posts, the moving-side three-phase positioning posts, and the moving contact three-phase positioning holes are all coaxially arranged; the first working surface is parallel to the second working surface.

3. The vacuum circuit breaker assembly positioning fixture according to claim 2, characterized in that, The vacuum circuit breaker assembly positioning fixture further includes a quick-change structure, which includes a first matching structure and a second matching structure. The first matching structure is arranged on the column surface of the three-phase connection post, and the second matching structure is arranged on the wall of the hole of the moving contact three-phase positioning hole. Along the circumferential direction around the central axis of the moving contact three-phase positioning hole, the quick-change structure has a first position and a second position. When the quick-change structure is in the first position, the first matching structure and the second matching structure are separated from each other. When the quick-change structure is in the second position, the first matching structure and the second matching structure are fixed to each other.

4. The vacuum circuit breaker assembly positioning jig according to claim 3, characterized in that, The first matching structure includes a positioning groove, which includes a first positioning groove and a second positioning groove that are perpendicular to each other and communicate with each other. The first positioning groove is parallel to the central axis. The first positioning groove has an open end, and the second positioning groove has a closed end. The second matching structure includes a convex block; when the quick-change structure is in the first position, the convex block is separated from the positioning groove. When the quick-change structure is in the second position, the convex block slides through the open end to the closed end and is clamped in the positioning groove.

5. The vacuum circuit breaker assembly positioning jig according to claim 4, characterized in that The quick-change structure further includes a positioning mechanism, which includes a spring plunger ball and a mating surface. The spring plunger ball is installed in the second positioning groove, and the convex block is provided with the mating surface. When the quick-change structure is in the second position, the spring plunger ball is positioned and abutted against the mating surface.

6. The vacuum circuit breaker assembly positioning fixture according to claim 5, characterized in that The second positioning groove is provided with a blind hole, the spring plunger ball is installed in the blind hole, and the mating surface is provided on the end face of the convex block facing away from the wall of the hole of the moving contact three-phase positioning hole.

7. The vacuum circuit breaker assembly positioning fixture according to claim 5, wherein, The cross section of the mating surface is arc-shaped or V-shaped.

8. The vacuum circuit breaker assembly positioning jig according to claim 1, characterized in that The vacuum circuit breaker assembly positioning fixture further includes a handle. An installation groove penetrating through the first working surface and the second working surface is provided on the fixture plate. The handle is placed in the installation groove. Installation posts are provided on the wall of the installation groove. The handle is connected to the installation posts and rotates around the installation posts.

9. The vacuum circuit breaker assembly positioning jig according to claim 1, characterized in that An annular countersunk groove is circumferentially arranged on each of the moving contact three-phase positioning holes, and the auxiliary three-phase positioning holes are opened in the annular countersunk groove.

10. A method for assembling and positioning a vacuum circuit breaker, which is realized by the vacuum circuit breaker assembling and positioning fixture described in any one of claims 1-9, characterized in that, Including: Fixing the lower end of the three-phase static-side insulating support seat to the lower bottom plate, sleeving the lower port of the three-phase static-side support conductor on the upper end of the three-phase static-side insulating support seat, and inserting the static-side three-phase positioning posts of the vacuum circuit breaker assembly positioning jig into the upper end of the three-phase static-side support conductor until the first working surface abuts against and positions the upper end of the three-phase static-side support conductor, and connecting the lower port of the three-phase static-side support conductor and the upper end of the three-phase static-side insulating support seat; Sleeving the lower end of the three-phase moving contact on the vacuum interrupter, inserting the moving contact three-phase positioning holes of the vacuum circuit breaker assembly positioning jig into the upper end of the three-phase moving contact, so that the auxiliary three-phase positioning holes and the third positioning holes of the three-phase moving contact correspond one by one, using a connecting piece to insert into the auxiliary three-phase positioning holes and the third positioning holes, and connecting the lower end of the three-phase moving contact and the vacuum interrupter; Fixing the upper end of the three-phase moving-side insulating support seat to the upper bottom plate, sleeving the upper port of the three-phase moving-side support conductor on the lower end of the three-phase moving-side insulating support seat, and inserting the moving-side three-phase positioning posts of the vacuum circuit breaker assembly positioning jig into the lower end of the three-phase moving-side support conductor until the second working surface abuts against and positions the lower end of the three-phase moving-side support conductor, and connecting the upper port of the three-phase moving-side support conductor and the lower end of the three-phase moving-side insulating support seat.

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