Vacuum circuit breaker assembling device

Abstract

The invention provides a vacuum circuit breaker assembling device, and belongs to the field of electrical switch manufacturing equipment. The vacuum circuit breaker assembling device comprises a tool frame and a support used for supporting a vacuum arc-extinguishing chamber, the support is rotatably arranged on the tool frame, a limiting piece is arranged on the tool frame, a rotation stopping groove is formed in the limiting piece, the orientation of a groove opening of the rotation stopping groove is in a horizontal state, and a moving contact of the vacuum arc-extinguishing chamber can horizontally enter and exit from the rotation stopping groove through the groove opening of the rotation stopping groove. The groove side wall of the rotation stopping groove is provided with a rotation stopping straight wall which is used for being matched with the moving contact of the vacuum arc-extinguishing chamber so as to enable the limiting piece and the moving contact to stop rotation in the circumferential direction, and the tool frame is further provided with a locking structure which is used for locking the limiting piece before the contact pressure spring is assembled and enabling the limiting piece to be unlocked after the contact pressure spring is assembled. The vacuum arc-extinguishing chamber does not need to be horizontally moved after being hoisted, so that the device is simple in overall structure and small in size, and the stability of the vacuum arc-extinguishing chamber can be improved.

Description

Technical Field

[0001] The invention belongs to the field of electrical switch manufacturing equipment, and in particular relates to a vacuum circuit breaker assembly device. Background Art

[0002] When SF6 gas leaks in switchgear that uses SF6 as the insulating medium, it is easy to cause environmental pollution. In order to reduce the use of switchgear containing SF6 gas, it is necessary to develop switchgear without SF6 gas, such as vacuum circuit breakers.

[0003] The vacuum interrupter is the core component of the vacuum circuit breaker. The moving contact of the vacuum interrupter is connected to a contact pressure spring. The contact pressure spring is used to apply a closing holding force to the moving contact after the vacuum interrupter is closed. Therefore, the assembly quality of the contact pressure spring directly affects the breaking performance of the vacuum interrupter. The existing Chinese utility model patent application with the authorization announcement number CN222126328U discloses an assembly device for a closing holding spring (i.e., a contact pressure spring), which includes a tooling frame, a support and a straightening plate are provided on the tooling frame, a positioning structure is provided on the support, and a stop groove is provided on the straightening plate for cooperating with the moving end stopper of the vacuum interrupter, and an opening is provided on one side of the stop groove for the moving end stopper to enter and exit horizontally. The support includes a support body and a support part rotatably mounted on the support body, the positioning structure is provided on the support part, and the support body is slidably arranged on the base of the tooling frame.

[0004] Before assembling the head pressure spring, the above device needs to install the vacuum arc chamber on the fixture frame. The specific process is: first, the static end of the vacuum arc chamber is hoisted downward and placed on the support part, and the vacuum arc chamber is positioned and fixed by the positioning structure, and then the vacuum arc chamber is pushed horizontally so that the moving end stopper of the vacuum arc chamber enters the stopper groove. In this process, the vacuum arc chamber needs to be rotated according to the posture of the moving end stopper. The above device needs to ensure the stability of the vacuum arc chamber during horizontal movement, so it is necessary to install a guide rail structure on the base of the fixture frame, resulting in a relatively complex overall structure of the above device, which in turn leads to high cost, inconvenient operation and poor reliability of the above device; the base of the above device needs to leave a large space for the support body to move, so the radial size of the base is also large, which makes the size of the entire device larger, limiting the application of the above device; in addition, since the vacuum arc chamber can be moved horizontally, the stability of the vacuum arc chamber will be reduced. Summary of the invention

[0005] The object of the present invention is to provide a vacuum circuit breaker assembly device to solve the technical problems in the prior art that the vacuum interrupter still needs to be moved horizontally on a tooling frame after hoisting, resulting in low stability, and that a guide rail structure needs to be installed on the tooling frame, resulting in a complex tooling frame structure and large size.

[0006] To achieve the above-mentioned purpose, the technical solution of the vacuum circuit breaker assembly device provided by the present invention is: A vacuum circuit breaker assembly device includes a tool frame and a support for supporting a vacuum arc chamber. The support is rotatably arranged on the tool frame. A limit piece is arranged on the tool frame. A stop groove is arranged on the limit piece. The notch of the stop groove is oriented horizontally and the notch of the stop groove allows a moving contact of the vacuum arc chamber to horizontally enter and exit the stop groove. The side wall of the stop groove has a stop straight wall for cooperating with the moving contact of the vacuum arc chamber so that the limit piece and the moving contact can stop rotating in the circumferential direction. The tool frame is also provided with a locking structure for locking the limit piece before assembling a contact pressure spring and unlocking the limit piece after assembling the contact pressure spring.

[0007] As a further improvement, one of the tooling frame and the limit piece is provided with a long guide hole, and the other is provided with a guide matching body passing through the long guide hole and matching with the guide long hole. When in use, the limit piece has a matching position for preventing rotation with the moving contact of the vacuum arc extinguishing chamber and a retreat position away from the moving contact along the length direction of the long guide hole.

[0008] As a further improvement, the guide fitting body includes at least two guide columns arranged at intervals along the length direction of the guide long hole, at least one guide column is a locking bolt for locking the tooling frame and the limit member, or at least one guide column is a threaded column and the threaded column is equipped with a locking nut for locking the tooling frame and the limit member.

[0009] As a further improvement, the tooling frame includes a base plate and a top plate, a support is arranged on the base plate, a limit piece is arranged on the top plate, a support column is arranged between the base plate and the bottom plate, and an avoidance groove is arranged on the top plate of the tooling frame. The groove opening of the avoidance groove is horizontal and the groove opening of the avoidance groove is used for allowing the vacuum arc chamber to horizontally enter and exit the avoidance groove when the vacuum arc chamber is hoisted.

[0010] As a further improvement, the tooling frame includes a bottom plate and a top plate, a support is arranged on the bottom plate, a limit piece is arranged on the top plate, a support column is arranged between the bottom plate and the bottom plate, the support column includes a main body section and an upper threaded connection section located at the upper end of the main body section, the outer diameter of the upper threaded connection section is smaller than the outer diameter of the main body section, a support step is formed between the main body section and the upper threaded connection section, a through hole is arranged on the top plate for the upper threaded connection section to pass through, a fixing nut for fixing the top plate is connected to the upper end of the upper threaded connection section, an adjusting sleeve is sleeved on the upper threaded connection section, and the upper and lower ends of the adjusting sleeve are respectively abutted against the bottom surface of the top plate and the step surface of the support step.

[0011] As a further improvement, the vacuum circuit breaker assembly device also includes a positioning structure for circumferentially positioning the joint, the positioning structure including a lower positioning piece arranged on the support and an upper positioning piece for installation on the joint, one of the upper positioning piece and the lower positioning piece is provided with a laser emitter, and the other is provided with a reference mark for aligning the laser emitted by the laser emitter.

[0012] As a further improvement, the upper positioning member is a rotary wrench, which includes a handle portion for holding and a wrench portion for inserting into a slot or hole on the joint to wrench the joint, and the handle portion and the wrench portion are arranged along the length direction of the rotary wrench.

[0013] As a further improvement, the rotary wrench also includes a limiting portion, the cross-sectional dimension of the limiting portion perpendicular to the length direction of the rotary wrench is larger than the cross-sectional dimension of the twisting portion perpendicular to the length direction of the rotary wrench so that when the twisting portion is inserted into the slot or hole on the joint, the limiting portion can stop and limit the joint in the length direction of the rotary wrench.

[0014] As a further improvement, the limiting portion is located at an end of the wrench portion away from the handle portion.

[0015] As a further improvement, the tooling frame includes a bottom plate and a top plate, a support is arranged on the bottom plate, a limit piece is arranged on the top plate, a support column is arranged between the bottom plate and the bottom plate, and an avoidance groove is arranged on the top plate of the tooling frame. The notch of the avoidance groove is oriented horizontally and the notch of the avoidance groove is used for allowing the vacuum arc extinguishing chamber to horizontally enter and exit the avoidance groove when hoisting the vacuum arc extinguishing chamber. During operation, the upper positioning piece and the lower positioning piece are both vertically aligned with the notch of the avoidance groove.

[0016] The beneficial effect is that the vacuum circuit breaker assembly device provided by the present invention is an improvement on the prior art. The vacuum circuit breaker assembly device uses a separately set limiter to circumferentially stop the moving contact of the vacuum interrupter, so that the vacuum interrupter does not need to be moved horizontally after hoisting, and further, there is no need to set a guide rail structure for the support to move on the fixture frame. Therefore, compared with the prior art, the structure of the vacuum circuit breaker assembly device is simpler and the size can be smaller; since the vacuum interrupter can be kept in place after hoisting, the stability of the vacuum interrupter can be improved, and the risk of instability and overturning of the vacuum interrupter during movement can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an assembly diagram of a vacuum interrupter chamber and a contact pressure spring used for assembly in Embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Figure 2 It is a schematic structural diagram of a contact pressure spring used for assembly in Embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Figure 3It is a schematic diagram of the overall structure of the embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Figure 4 It is a cross-sectional view of the tooling frame in Embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Figure 5 It is a structural schematic diagram of a position-limiting member in Embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Figure 6 A cross-sectional view of a bottom plate in Embodiment 1 of a vacuum circuit breaker assembly device of the present invention; Figure 7 It is a structural schematic diagram of a rotary wrench in Embodiment 1 of the vacuum circuit breaker assembly device of the present invention; Description of reference numerals: 1. Bottom plate; 110. Mounting table; 2. Top plate; 21. Avoidance groove; 3. Support column; 31. Main body section; 32. Upper threaded section; 4. Fixing nut; 5. Adjusting sleeve; 6. Support; 7. Buffer pad; 8. Positioning pin; 9. Thrust bearing; 10. Limiting piece; 101. Anti-rotation groove; 102. Anti-rotation straight wall; 103. Long guide hole; 11. Cylindrical pin; 12. Locking bolt; 13. Rotating wrench; 131. Handle part; 132. Tightening part; 133. Limiting part; 14. Laser emitter; 15. Lower positioning piece; 151. Reference hole; 16. Operating wrench; 17. Vacuum interrupter; 171. Moving contact; 172. Static contact; 173. Contact seat; 18. Contact pressure spring; 181. Outer cylinder; 182. Spring body; 183. Slider; 184. Plug; 19. Connector; 20. Insulating pull rod. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with embodiments.

[0019] In order to solve the problems in the prior art, the basic concept of the present invention is to fix the position of the vacuum interrupter and use a movable limiting member to limit the circumferential rotation of the moving contact of the vacuum interrupter.

[0020] Specific embodiment 1 of the vacuum circuit breaker assembly device provided by the present invention: The vacuum circuit breaker assembly device is used to assemble the contact pressure spring 18 onto the vacuum interrupter 17, and then assemble the joint 19 onto the contact pressure spring 18. Figure 1 , wherein the vacuum interrupter 17 has a moving contact 171 and a stationary contact 172, the moving contact 171 is provided with a contact seat 173, and the stationary contact 172 is provided with a threaded hole; see attached Figure 2The contact pressure spring 18 includes an outer cylinder 181, a spring body 182 and a slider 183 arranged in the outer cylinder 181, and a plug 184 threadedly connected to one end of the outer cylinder 181. The two ends of the spring body 182 are respectively in contact with the ends of the outer cylinder 181 and the ends of the slider 183. The plug 184 is used to limit the end of the slider 183 away from the spring body 182 to prevent the slider 183 from escaping from the outer cylinder 181. The slider 183 and the contact seat 173 are both centrally opened. During assembly, bolts can be used to pass through the central holes of the slider 183 and the contact seat 173 from the cylinder, and then connected to the threaded holes on the moving contact 171. The joint 19 is threadedly installed at the end of the cylinder away from the vacuum interrupter 17. The joint 19 is provided with a slot for inserting the end of the insulating pull rod 20, and also with an opening for the hinge shaft to penetrate.

[0021] In other embodiments, the contact pressure spring 18 may also be of other structural forms, such as the closing holding spring in the Chinese utility model patent with authorization announcement number CN222126328U, which can also be assembled to the vacuum arc chamber 17 using the vacuum circuit breaker assembly device of the present invention.

[0022] See attached Figure 3 The vacuum circuit breaker assembly device includes a tooling frame, a support 6 and a limit member 10.

[0023] See attached Figure 4 The tooling frame includes a bottom plate 1, a top plate 2, and a support column 3 disposed between the bottom plate 1 and the top plate 2. Both the bottom plate 1 and the top plate 2 are circular plates. Three support columns 3 are provided, each of which includes a main body section 31, an upper threaded connection section located at the upper end of the main body section 31, and a lower threaded connection section located at the lower end of the main body section 31. The outer diameters of the upper threaded connection section and the lower threaded connection section are smaller than the outer diameter of the main body section 31, so that a support step is formed between the main body section 31 and the upper threaded connection section, and a stop step is formed between the main body section 31 and the lower threaded connection section.

[0024] See attached Figure 6 The bottom plate 1 is provided with a boss, the upper end surface of the boss is provided with a threaded hole, the lower threaded connection section is installed in the threaded hole on the boss, and the step surface of the stop step is tightly abutted against the upper end surface of the boss. The top plate 2 is provided with a through hole for the upper threaded connection section to pass through, the upper end of the upper threaded connection section is connected with a fixing nut 4 for fixing the top plate 2, and the upper threaded connection section is sleeved with an adjusting sleeve 5, and the upper and lower ends of the adjusting sleeve 5 are respectively abutted against the bottom surface of the top plate 2 and the step surface of the supporting step.

[0025] During the assembly process, the adjusting sleeve 5 is firstly sleeved on the upper threaded connection section, and then the top plate 2 is assembled so that the top plate 2 is located above the adjusting sleeve 5, and finally the fixing nut 4 is installed. The axial dimensions of vacuum interrupters 17 of different models and specifications are different. The vacuum circuit breaker assembly device can adapt to different vacuum interrupters 17 by replacing adjusting sleeves 5 of different axial dimensions. For vacuum interrupters 17 with smaller axial dimensions, the adjusting sleeve 5 can be directly removed, and the top plate 2 can be directly placed against the step surface of the supporting step, thereby reducing the height of the top plate 2.

[0026] The support 6 is used to support the vacuum arc chamber 17. A buffer pad 7 is installed on the upper end surface of the support 6 to prevent the vacuum arc chamber 17 from colliding with the support 6 and damaging the vacuum arc chamber 17. The buffer pad 7 is specifically a polytetrafluoroethylene pad. A positioning pin 8 is installed on the support 6. The positioning pin 8 is inserted into the threaded hole on the static contact 172 of the vacuum arc chamber 17 during the process of hoisting the vacuum arc chamber 17 onto the support 6, so as to position the vacuum arc chamber 17 and prevent the vacuum arc chamber 17 from tipping over during the process of assembling the contact pressure spring 18 onto the vacuum arc chamber 17. The support 6 is rotatably installed on the base plate 1. Specifically, a mounting platform 110 is provided at the center of the base plate 1. A mounting groove is provided at the center of the mounting platform 110. The lower end of the support 6 is located in the mounting groove, and a thrust bearing 9 for supporting the support 6 is provided in the mounting groove.

[0027] The limiting member 10 is arranged on the top plate 2, see the attached Figure 5 A stop groove 101 is provided at one end of the limit member 10 in the length direction, and the notch of the stop groove 101 is in a horizontal state. The notch of the stop groove 101 allows the moving contact 171 of the vacuum arc chamber 17 to horizontally enter and exit the stop groove 101. The groove walls on both sides of the stop groove 101 are parallel stop straight walls 102. The stop straight walls 102 can cooperate with the plane on the moving contact 171 on the vacuum arc chamber 17, thereby stopping the limit member 10 and the moving contact 171 from rotating.

[0028] The position-limiting member 10 is provided with a long guide hole 103, and the length direction of the long guide hole 103 is in the same direction as the length direction of the position-limiting member 10. The top plate 2 is provided with a guide matching body that passes through the long guide hole 103 and matches with the long guide hole 103. The guide matching body includes two guide columns, and the two guide columns are arranged at intervals along the length direction of the long guide hole 103. One of the two guide columns is a cylindrical pin 11 fixedly provided on the top plate 2, and the other is a locking bolt 12. The top plate 2 is provided with a threaded hole for installing the locking bolt 12. After tightening the locking bolt 12, the position-limiting member 10 and the top plate 2 can be relatively fixed, so that the top plate 2 is locked.

[0029] The top plate 2 is provided with an avoidance groove 21, the notch of which is in a horizontal state, and the notch of the avoidance groove 21 is used for the vacuum interrupter 17 to horizontally enter and exit the avoidance groove 21 when the vacuum interrupter 17 is hoisted. The groove width of the avoidance groove 21 is greater than the outer diameter of the vacuum interrupter 17 to ensure that the vacuum interrupter 17 will not collide with the top plate 2 during the hoisting process. The setting position of the limiter 10 corresponds to the groove bottom position of the avoidance groove 21, and the notch of the anti-rotation groove 101 on the limiter 10 faces the same direction as the notch of the avoidance groove 21.

[0030] Before the vacuum interrupter 17 is hoisted onto the vacuum circuit breaker assembly device, the locking bolt 12 is in a loosened state. At this time, the locking bolt 12 cooperates with the cylindrical pin 11 to guide the limiter 10, and at this time, the limiter 10 retreats backwards from the range of the avoidance groove 21 and is in a retreated position. During the hoisting of the vacuum interrupter 17, the vacuum interrupter 17 is in a state with the static end facing downward and the dynamic end facing upward. The vacuum interrupter 17 is first on the horizontal side of the tooling frame, and then the vacuum interrupter 17 is moved horizontally so that the vacuum interrupter 17 enters the avoidance groove 21. Finally, the posture of the vacuum interrupter 17 is adjusted so that the threaded hole at the static end of the vacuum interrupter 17 is aligned with the positioning pin 8 on the support 6. Finally, the vacuum interrupter 17 is moved downward so that the vacuum interrupter 17 sits on the support 6, and the positioning pin 8 is inserted into the threaded hole at the static end of the vacuum interrupter 17. Finally, the hoisting tooling is removed.

[0031] After that, the assembled contact pressure spring 18 is pre-installed on the moving contact 171 of the vacuum interrupter 17 by bolts, and the bolts are not tightened at this time. Then, the contact pressure spring 18 is gently pulled up by a crane, so that the moving contact 171 of the vacuum interrupter 17 is pulled out a certain distance, and at this time, the limiter 10 is pushed in the direction close to the moving contact 171 of the vacuum interrupter 17, so that the moving contact 171 of the vacuum interrupter 17 enters the avoidance groove 21 of the limiter 10, and the moving contact 171 of the vacuum interrupter 17 is matched with the limiter 10 to prevent rotation. After completing the above operations, tighten the locking bolts so that the limiter 10 is locked on the top plate 2, and the limiter 10 is in the matching position. In the process of matching the limit member 10 with the moving contact 171 of the vacuum arc chamber 17, it is necessary to align the plane on the moving contact 171 of the vacuum arc chamber 17 with the anti-rotation straight wall 102 in the anti-rotation groove 101 of the limit member 10. This purpose can be achieved by rotating the vacuum arc chamber 17.

[0032] Finally, a wrench tool is used to insert the wrench from the upper end of the contact pressure spring 18 into the outer cylinder 181 of the contact pressure spring 18, and then the bolts used to fix the contact pressure spring 18 and the moving contact 171 of the vacuum interrupter 17 are tightened. In the process of tightening the bolts, since the stopper 10 can maintain the fixed posture of the moving contact 171 of the vacuum interrupter 17 in the circumferential direction, the torque generated when tightening the bolts will not be transmitted downward along the moving contact 171 of the vacuum interrupter 17, so the bellows in the vacuum interrupter 17 can be protected.

[0033] During the process of hoisting the vacuum interrupter 17, since the vacuum interrupter 17 can be loaded into the tooling frame from the horizontal side of the tooling frame, it does not need to be hoisted too high, and can be operated in an environment with limited space. In other embodiments, the top plate 2 may not be provided with the avoidance groove 21, but a avoidance hole is provided at the center of the top plate 2. In this embodiment, the vacuum interrupter 17 needs to be hoisted and then loaded into the tooling frame from top to bottom.

[0034] After the contact pressure spring 18 is assembled, the joint 19 used to connect with the insulating pull rod 20 is installed on the upper end of the contact pressure spring 18, and the joint 19 is connected to the upper end of the contact pressure spring 18 by threads. The insulating pull rod 20 is used to connect with the operating mechanism, and the connection method is hinged through a hinge shaft, so the position of the insulating pull rod 20 in the circumferential direction needs to be determined to facilitate smooth assembly in the later stage. In order to achieve the above purpose, after the joint 19 is installed on the contact pressure spring 18, it is necessary to rotate the joint 19 so that the joint 19 is in a suitable position in the circumferential direction relative to the threaded hole on the stationary contact 172.

[0035] The vacuum circuit breaker assembly device also includes a positioning structure for circumferentially positioning the joint 19, and the positioning structure includes a lower positioning member 15 arranged on the support 6 and an upper positioning member for mounting on the joint 19. Figure 7 The upper positioning member is a rotary wrench 13, which includes a handle portion 131, a wrench portion 132 and a limit portion 133. The handle portion 131 and the wrench portion 132 are arranged along the length direction of the rotary wrench 13, and the limit portion 133 is located at one end of the wrench portion 132 away from the handle portion 131.

[0036] The handle portion 131 is used for the operator to hold, and the wrench portion 132 is used to be inserted into the slot on the joint 19. When the rotary wrench 13 is rotated around the axis of the joint 19, the joint 19 can be driven to rotate together. The cross-sectional dimension of the limit portion 133 perpendicular to the length direction of the rotary wrench 13 is greater than the cross-sectional dimension of the wrench portion 132 perpendicular to the length direction of the rotary wrench 13, so that when the wrench portion 132 is inserted into the slot or opening on the joint 19, the limit portion 133 can stop and limit the joint 19 in the length direction of the rotary wrench 13. Specifically, when the rotary wrench 13 is in use, the operator first holds the handle portion 131, places the wrench portion 132 in the slot on the joint 19, and then pulls the rotary wrench 13 so that the limit portion 133 abuts against the side surface of the joint 19 facing away from the operator, thereby making the rotary wrench 13 and the joint 19 have a certain positional relationship.

[0037] See attached Figure 6 , the lower positioning member 15 is fixed to the circumferential side of the support 6 by bolts, and a laser emitter 14 is installed on the upper positioning member, and the laser emitter 14 emits laser downward. A reference mark for laser alignment is provided on the lower positioning member 15. In this embodiment, the reference mark is specifically a reference hole 151, and the reference hole 151 is a long hole, and the length extension line of the reference hole 151 passes through the central axis of the support 6. When the operator turns the rotating wrench 13 so that the laser falls into the reference hole 151, the circumferential positioning of the joint 19 is completed. The laser emitter 14 is arranged on the upper positioning member, so that the laser can be emitted downward to avoid hurting the eyes of the operator. In other embodiments, the laser emitter 14 can also be arranged on the lower positioning member 15. In other embodiments, the reference mark can also be a raised point or a point marked with a color, which will not be described in detail here.

[0038] In the process of matching the stopper 10 with the moving contact 171 of the vacuum interrupter 17, the vacuum interrupter 17 is rotated and the lower positioning member 15 is vertically aligned with the notch of the avoidance groove 21. Since the notch position of the avoidance groove 21 will not block the operator's sight, the operator can more conveniently observe the position of the laser point during the rotation of the rotary wrench 13, thereby improving the convenience of operation. Of course, in other embodiments, the lower positioning member 15 may not be vertically aligned with the notch larger than the avoidance groove 21.

[0039] The vacuum circuit breaker assembly device utilizes the cooperation between the limit member 10 and the moving contact 171 of the vacuum arc chamber 17 to fix the moving contact 171, and since the limit member 10 can lock the limit member 10 before assembling the contact pressure spring 18 and be unlocked after assembling the contact pressure spring 18, there is no need to install a guide rail structure on the base plate 1 to make the support 6 movable as in the prior art. After the vacuum arc chamber 17 is hoisted and installed on the support 6, the vacuum arc chamber 17 does not need to be moved again. This can simplify the structure of the connection between the base plate 1 and the support 6 and reduce the size of the base plate 1, thereby reducing the manufacturing cost of the vacuum circuit breaker assembly device, improving the convenience of operation, and being suitable for places with limited space. On the other hand, since there is no need to move the vacuum arc chamber 17, the stability of the vacuum arc chamber 17 can be improved.

[0040] Specific embodiment 2 of the vacuum circuit breaker assembly device provided by the present invention: This embodiment is based on the embodiment 1, and is different from the embodiment 1 in that in this embodiment, the position limiting member is not provided with a guide long hole, but only with a connection hole for the locking bolt and the cylindrical pin to pass through, and the position limiting member is in a separated state from the top plate before the vacuum interrupter is hoisted. After the vacuum interrupter is hoisted, the anti-rotation groove on the position limiting member is first matched with the moving contact of the vacuum interrupter, and then the vacuum interrupter is rotated to rotate the position limiting member to a suitable position, and finally the position limiting member is moved downward to make the position limiting member fit on the upper surface of the top plate, and finally the position limiting member is locked with the locking bolt.

[0041] Specific embodiment 3 of the vacuum circuit breaker assembly device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the guide fitting body in this embodiment may also be two threaded columns, and the threaded columns are both equipped with locking nuts for locking the limit member and the top plate.

[0042] Specific embodiment 4 of the vacuum circuit breaker assembly device provided by the present invention: This embodiment is based on Embodiment 1, and is different from Embodiment 1 in that the upper positioning member in this embodiment is not used for tightening the joint 19 .

[0043] During the rotation of the rotary wrench 13, the slider 183 in the contact pressure spring 18 rotates relative to the outer cylinder 181. The lower end of the outer cylinder 181 is provided with a plug 184 through a thread. The plug 184 is used to prevent the slider 183 from axially escaping from the outer cylinder 181. Therefore, the plug 184 and the slider 183 can also rotate relative to each other. The outer peripheral side of the slider 183 is provided with a wrenching surface for wrenching. Figure 3 In this embodiment, the operating wrench 16 is used to rotate the plug 184, and then the joint 19 is rotated to complete the circumferential positioning of the joint 19.

[0044] At this time, the upper positioning piece no longer needs to be used as an object for applying force to twist the connector 19. The upper positioning piece can only serve as an installation base for the laser emitter 14. Therefore, the upper positioning piece may not be provided with a handle portion 131 and a twisting portion 132, but may be provided with an insertion portion that can be inserted into the opening on the connector 19.

[0045] In this embodiment, since the operator is not required to directly rotate the upper positioning member, the obstruction of the observation laser point can be reduced, and the convenience of observation and positioning operations is further improved.

[0046] Specific embodiment 5 of the vacuum circuit breaker assembly device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the limiting portion is located between the wrench portion and the handle portion. During use, the operator needs to push the rotating handle so that the limiting portion abuts against the side of the joint close to the operator to achieve the limit of the rotating wrench.

[0047] Compared with Example 1, since there is no obstruction at the end of the wrench portion away from the handle portion, the wrench portion can be inserted into the opening on the joint for use, which increases stability during operation.

[0048] Specific embodiment 6 of the vacuum circuit breaker assembly device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no limit portion is provided in this embodiment, and the depth to which the rotary wrench is inserted into the opening or groove on the joint is determined by the operator's observation during operation.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum circuit breaker assembly device, comprising a fixture frame and a support for supporting a vacuum interrupter, characterized in that: The support is rotatably arranged on the tooling frame, and a limiting piece is arranged on the tooling frame. A stop groove is arranged on the limiting piece. The notch of the stop groove is oriented horizontally and the notch of the stop groove allows the moving contact of the vacuum arc chamber to horizontally enter and exit the stop groove. The side wall of the stop groove has a stop straight wall for cooperating with the moving contact of the vacuum arc chamber so that the limiting piece and the moving contact can stop rotating in the circumferential direction. The tooling frame is also provided with a locking structure for locking the limiting piece before assembling the contact pressure spring and unlocking the limiting piece after the contact pressure spring is assembled.

2. The vacuum circuit breaker assembly device according to claim 1, characterized in that: One of the tooling frame and the limit piece is provided with a long guide hole, and the other is provided with a guide matching body that passes through the long guide hole and matches with the guide of the long guide hole. When in use, the limit piece has a matching position for stopping rotation with the moving contact of the vacuum arc extinguishing chamber and a retreat position away from the moving contact along the length direction of the long guide hole.

3. The vacuum circuit breaker assembly device according to claim 2, characterized in that: The guide fitting body includes at least two guide columns arranged at intervals along the length direction of the guide long hole, at least one guide column is a locking bolt for locking the tooling frame and the limit piece, or at least one guide column is a threaded column and a locking nut for locking the tooling frame and the limit piece is assembled on the threaded column.

4. The vacuum circuit breaker assembly device according to any one of claims 1 to 3, characterized in that: The tooling frame includes a bottom plate and a top plate, a support is arranged on the bottom plate, a limit piece is arranged on the top plate, a support column is arranged between the bottom plate and the bottom plate, and an avoidance groove is arranged on the top plate of the tooling frame. The notch of the avoidance groove is oriented horizontally and the notch of the avoidance groove is used for allowing the vacuum arc extinguishing chamber to horizontally enter and exit the avoidance groove when hoisting the vacuum arc extinguishing chamber.

5. The vacuum circuit breaker assembly device according to any one of claims 1 to 3, characterized in that: The tooling frame includes a bottom plate and a top plate, a support is arranged on the bottom plate, a limit piece is arranged on the top plate, a support column is arranged between the bottom plate and the bottom plate, the support column includes a main body section and an upper threaded connection section located at the upper end of the main body section, the outer diameter of the upper threaded connection section is smaller than the outer diameter of the main body section, a support step is formed between the main body section and the upper threaded connection section, a through hole is arranged on the top plate for the upper threaded connection section to pass through, a fixing nut for fixing the top plate is connected to the upper end of the upper threaded connection section, an adjusting sleeve is sleeved on the upper threaded connection section, and the upper and lower ends of the adjusting sleeve are respectively abutted against the bottom surface of the top plate and the step surface of the supporting step.

6. The vacuum circuit breaker assembly device according to any one of claims 1 to 3, characterized in that: The vacuum circuit breaker assembly device also includes a positioning structure for circumferentially positioning the joint, the positioning structure includes a lower positioning piece arranged on the support and an upper positioning piece for installation on the joint, one of the upper positioning piece and the lower positioning piece is provided with a laser emitter, and the other is provided with a reference mark for aligning the laser emitted by the laser emitter.

7. The vacuum circuit breaker assembly device according to claim 6, characterized in that: The upper positioning member is a rotary wrench, which comprises a handle for holding and a wrench portion for inserting into a slot or hole on a joint to wrench the joint, and the handle and the wrench portion are arranged along the length direction of the rotary wrench.

8. The vacuum circuit breaker assembly device according to claim 7, characterized in that: The rotary wrench also includes a limiting portion, the cross-sectional dimension of the limiting portion perpendicular to the length direction of the rotary wrench is larger than the cross-sectional dimension of the wrench portion perpendicular to the length direction of the rotary wrench so that when the wrench portion is inserted into the slot or hole on the joint, the limiting portion can stop and limit the joint in the length direction of the rotary wrench.

9. The vacuum circuit breaker assembly device according to claim 8, characterized in that: The limiting portion is located at an end of the twisting portion away from the handle portion.

10. The vacuum circuit breaker assembly device according to claim 6, characterized in that: The tooling frame includes a bottom plate and a top plate, a support is arranged on the bottom plate, a limit piece is arranged on the top plate, a support column is arranged between the bottom plate and the bottom plate, and an avoidance groove is arranged on the top plate of the tooling frame. The notch of the avoidance groove is oriented horizontally and the notch of the avoidance groove is used for allowing the vacuum arc extinguishing chamber to horizontally enter and exit the avoidance groove when hoisting the vacuum arc extinguishing chamber. During operation, the upper positioning piece and the lower positioning piece are both vertically aligned with the notch of the avoidance groove.

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