Pull-open distance testing device of vacuum arc-extinguishing chamber

Abstract

The utility model provides a pull-open distance testing device for a vacuum arc-extinguishing chamber, belongs to the technical field of vacuum device testing, and solves the problem that copper caps are inconvenient to place in the prior art. The device comprises a first support and a second support arranged on the first support, the first support is provided with a plurality of first driving mechanisms used for pulling a movable conducting rod downwards, the second support is provided with a plurality of second driving mechanisms used for vertical lifting, and the second driving mechanisms are connected with first insulating connecting seats. The first insulating connecting seat is connected with a conductive pressing plate, a conductive connecting piece is clamped between the first insulating connecting seat and the conductive pressing plate, and the lower end of the conductive pressing plate is connected with a conductive cap. The first driving mechanism can pull the movable conducting rod, so that the opening distance between the movable contact and the static contact is kept, the second driving mechanism can drive each conducting cap, accurate placement of the conducting caps is achieved, control operation can be achieved only by one operator, operation is easy and convenient, and the detection efficiency can be effectively improved.

Description

A device for testing the opening distance of a vacuum interrupter. Technical Field

[0001] This utility model belongs to the field of vacuum device testing technology, specifically to a vacuum interrupter distance testing device. Background Technology

[0002] A vacuum interrupter (also known as a vacuum switch tube) is a core component of medium- and high-voltage power switches. Its core function is to reliably interrupt and extinguish the arc by utilizing the excellent insulation and rapid dielectric recovery characteristics of a high-vacuum environment. A vacuum interrupter consists of a moving contact and a stationary contact. The moving contact is connected to a moving conductive rod, and the stationary contact is connected to a conductive block via a stationary conductive rod.

[0003] In the production process of vacuum interrupters, short-time power frequency testing is a crucial step in ensuring the quality of the vacuum interrupters. Short-time power frequency testing involves pulling the moving conductive rod of the vacuum interrupter to maintain a certain distance between the moving and stationary contacts, applying a certain power frequency voltage between the moving and stationary contacts, detecting the magnitude of the leakage current, and observing the discharge phenomenon inside the interrupter. If there is no continuous discharge phenomenon inside the vacuum interrupter, it indicates that its vacuum level meets the requirements. Existing technology, such as the multi-station vacuum interrupter opening distance device and testing equipment disclosed in patent publication number CN220584289U, includes a frame, a servo motor in the middle of the frame, the servo motor connected to a reducer via a connecting device, the reducer connected to a clamping device, and the servo motor driving the clamping device to move up and down through the reducer. Several vacuum interrupters are arranged on the frame, and the guide rod of the vacuum interrupter passes through the frame to install a connector, which is detachably connected to the clamping device. When multiple workstations are processing and testing simultaneously, the separation device automatically separates each vacuum interrupter to the same opening distance, improving work efficiency, eliminating separation distance errors caused by the size of the interrupter and the frame, ensuring that the moving and stationary contacts of the interrupter chambers at multiple workstations are simultaneously separated to the same opening distance, reducing the inaccuracy of manual separation, and ensuring the consistency of product processing.

[0004] While the aforementioned patent discloses a method to maintain the distance between the moving and stationary contacts by pulling the moving conductive rod, it does not disclose how to connect the power supply to the conductive block. The conventional method involves installing several copper caps on a copper strip, attaching each cap to a corresponding conductive block, and then connecting power wires to both ends of the copper strip. This allows for simultaneous energization of several conductive blocks. However, placing the copper caps is cumbersome, especially when there is only one operator, further hindering operation and impacting testing efficiency. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a vacuum interrupter opening distance testing device. The first driving mechanism can pull the moving conductive rod to maintain the opening distance between the moving and stationary contacts, while the second driving mechanism can drive each conductive cap to achieve precise placement of the conductive cap. Only one operator is needed to control the operation, making it simple and convenient to operate and effectively improving the testing efficiency.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A vacuum interrupter opening distance testing device includes a first support and a second support mounted on the first support. The first support is provided with several first drive mechanisms for pulling down a moving conductive rod. The second support is provided with several second drive mechanisms for vertical lifting. The second drive mechanisms are connected to a first insulating connector. The first insulating connector is connected to a voltage-conducting clamping plate. A conductive connector is clamped between the first insulating connector and the voltage-conducting clamping plate. A conductive cap is connected to the lower end of the voltage-conducting clamping plate.

[0008] Preferably, a conductive slide rod is connected to the lower end of the conductive voltage clamping plate, the conductive slide rod is slidably engaged with the conductive cap, and a spring is connected between the conductive voltage clamping plate and the conductive cap.

[0009] Preferably, the upper end face of the conductive plate is connected to a first screw head that can be moved through the conductive connector, and the first screw head is threadedly connected to the first insulating connector.

[0010] Preferably, the first driving mechanism includes a first telescopic cylinder installed below the first bracket, the first telescopic cylinder is connected to a first driving rod, the first driving rod is connected to a second insulating connecting seat, the second insulating connecting seat is connected to a conductive seat, the upper end face of the conductive seat is provided with a groove, one side of the conductive seat is provided with a connecting groove and a limiting groove, the connecting groove communicates with the side wall of the groove and the upper end face of the conductive seat, the limiting groove communicates with the bottom of the groove and the contact surface of the limiting groove and the groove forms a step, and the movable conductive rod is provided with an annular groove for engaging the groove.

[0011] Preferably, a placement seat is fixedly provided on the first bracket, a through groove is vertically provided in the placement seat, and a clearance groove for avoiding the moving conductive rod is provided on the side wall of the placement seat along the direction of the annular groove engaging the groove.

[0012] Preferably, the side wall of the placement seat is provided with a placement groove that communicates with the upper end surface of the placement seat along the direction in which the annular groove is inserted into the groove.

[0013] Preferably, the upper end of the first drive rod and the lower end of the conductive seat are both provided with a second screw head that is threadedly connected to the second insulating connecting seat.

[0014] Preferably, the second drive mechanism includes a second telescopic cylinder, which is connected to a second drive rod, and the second drive rod is threadedly connected to a first insulating connecting seat.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] The first drive mechanism can pull the moving conductive rod to maintain the distance between the moving and stationary contacts. The second drive mechanism can drive each conductive cap to achieve precise placement of the conductive cap. Only one operator is needed to control the operation, which is simple and convenient and can effectively improve the efficiency of detection. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the front cross-sectional structure provided in an embodiment of the present utility model;

[0019] Figure 2 is a magnified schematic diagram of the structure at point A in Figure 1;

[0020] Figure 3 is a magnified schematic diagram of the structure at point B in Figure 1;

[0021] Figure 4 is a three-dimensional cross-sectional view of the placement seat provided in an embodiment of this utility model.

[0022] Reference numerals: 100-Vacuum interrupter; 101-Moving conductive rod; 102-Conductive block; 103-Annular groove; 1-First support; 2-Second support; 3-First telescopic cylinder; 301-First drive rod; 4-Screw; 5-Wing plate; 6-Second telescopic cylinder; 601-Second drive rod; 7-Conductive connector; 8-Placement seat; 9-Through groove; 10-Placement groove; 11-Allowing groove; 12-First insulating connection seat; 13-First screw head; 14-Conductive voltage tightening plate; 15-Conductive slide rod; 16-Spring; 17-Conductive cap; 18-Conductive seat; 19-Second screw head; 20-Groove; 21-Connecting groove; 22-Limiting groove; 23-Second insulating connection seat. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] The present invention will now be described in detail with reference to Figures 1-4.

[0027] Example

[0028] A vacuum interrupter opening distance testing device includes a first support 1 and a second support 2 mounted on the first support 1. The first support 1 is provided with several first drive mechanisms for pulling down the moving conductive rod 101. The second support 2 is equipped with several second drive mechanisms for vertical lifting. The second drive mechanisms are connected to a first insulating connecting seat 12. The first insulating connecting seat 12 is connected to a voltage-conducting clamping plate 14. A conductive connector 7 is clamped between the first insulating connecting seat 12 and the voltage-conducting clamping plate 14. A conductive cap 17 is connected to the lower end of the voltage-conducting clamping plate 14.

[0029] The vacuum interrupter 100 includes a moving contact and a stationary contact. The moving contact is connected to a moving conductive rod 101, and the stationary contact is connected to a conductive block 102 through a stationary conductive rod. A first driving mechanism can pull the moving conductive rod 101 to maintain the opening distance between the moving and stationary contacts. A second driving mechanism can drive each conductive cap 17 to achieve precise placement of the conductive cap 17. Only one operator is needed to control the operation, which is simple and convenient and can effectively improve the efficiency of detection.

[0030] The first insulating connector 12 is provided to prevent damage to the electrical equipment on the second drive mechanism due to power supply during the detection process. The conductive plate 14, conductive cap 17, and conductive connector 7 are made of copper, and the conductive connector 7 can be a copper strip or copper bar. The conductive connector 7 electrically connects all the conductive caps 17, and connecting individual power supply wires to the conductive connector 7 can energize all the conductive caps 17.

[0031] As shown in Figure 2, a conductive slide rod 15 is connected to the lower end of the conductive pressure plate 14. The conductive slide rod 15 slides in conjunction with the conductive cap 17, and a spring 16 connects the conductive pressure plate 14 and the conductive cap 17. With the conductive slide rod 15 sliding in conjunction with the conductive cap 17, the conductive cap 17 can maintain a stable vertical sliding motion. After the conductive cap 17 contacts the conductive block 102, it can continue to move upward, preventing the second drive mechanism from driving the conductive cap 17 to crush the conductive block 102. The spring 16 ensures that the conductive cap 17 and the conductive block 102 maintain close contact, guaranteeing normal power supply.

[0032] The upper end face of the voltage-conducting clamping plate 14 is connected to a first screw head 13 that can move through the conductive connector 7. The first screw head 13 is threadedly connected to the first insulating connector 12. The voltage-conducting clamping plate 14 is connected to the first insulating connector 12 through the first screw head 13, which facilitates disassembly and assembly, and can also tighten the conductive connector 7 to ensure normal power supply.

[0033] As shown in Figures 1 and 3, the first driving mechanism includes a first telescopic cylinder 3 installed below the first bracket 1. The first telescopic cylinder 3 is connected to a first driving rod 301. A second insulating connecting seat 23 is connected to the first driving rod 301. A conductive seat 18 is connected to the second insulating connecting seat 23. A groove 20 is formed on the upper end face of the conductive seat 18. A connecting groove 21 and a limiting groove 22 are formed on one side of the conductive seat 18. The connecting groove 21 communicates with the side wall of the groove 20 and the upper end face of the conductive seat 18. The limiting groove 22 communicates with the bottom of the groove 20, and the contact surface of the limiting groove 22 and the groove 20 forms a step. An annular groove 103 for engaging the groove 20 is formed on the movable conductive rod 101.

[0034] The movable conductive rod 101 slides into the conductive seat 18 from the connecting groove 21 and the limiting groove 22. When the annular groove 103 is located in the groove 20, the step can abut against the protrusion at the lower end of the movable conductive rod 101, thereby preventing the movable conductive rod 101 from disengaging from the conductive seat 18 during the downward pulling process. The conductor (not shown in the figure) connecting the conductive seat 18 to the power supply is used in conjunction with the energization of the conductive cap 17 to perform the detection operation. The second insulating connecting seat 23 can prevent the electrical equipment on the first telescopic cylinder 3 from being damaged due to the power supply during the detection process.

[0035] A placement seat 8 is fixedly mounted on the first support 1. A vertical through groove 9 is provided in the placement seat 8. A clearance groove 11 for avoiding the moving conductive rod 101 is provided on the side wall of the placement seat 8 along the direction in which the annular groove 103 is inserted into the groove 20. The vacuum interrupter 100 slides laterally, causing the moving conductive rod 101 to move from the clearance groove 11 into the through groove 9 of the placement seat 8, thereby connecting the moving conductive rod 101 to the conductive seat 18.

[0036] The side wall of the placement seat 8 is provided with a placement groove 10 that communicates with the upper end face of the placement seat 8 along the direction in which the annular groove 103 engages with the groove 20. The placement groove 10 can assist the vacuum interrupter 100 in being placed in place; specifically, the placement groove 10 is a U-shaped groove. When the vacuum interrupter 100 slides into one side of the U-shaped groove and abuts against it, the vacuum interrupter 100 is placed in place, and at this time the moving conductive rod 101 slides into the conductive seat 18.

[0037] The conductive base 18 is connected to the wires that extend from the clearance groove 11 to the placement base 8, thereby connecting to the external power supply and detection equipment; the conductive connector 7 also clamps the wires connected to the detection equipment, thereby detecting the discharge phenomenon.

[0038] Both the upper end of the first drive rod 301 and the lower end of the conductive seat 18 are provided with second screw heads 19 that are threadedly connected to the second insulating connecting seat 23. This threaded connection facilitates assembly and disassembly. Furthermore, the two second screw heads 19 rotate in the same direction; that is, after the second insulating connecting seat 23 is connected to the first drive rod 301, tightening the conductive seat 18 will further tighten the second insulating connecting seat 23 and the first drive rod 301, rather than loosening them in the opposite direction. If the limiting groove 22 on the conductive seat 18 is not aligned with the clearance groove 11, the movable conductive rod 101 cannot slide correctly into the conductive seat 18. In this case, the first drive rod 301 can be manually rotated at a certain angle to ensure smooth connection between the conductive rod 101 and the conductive seat 18.

[0039] The second drive mechanism includes a second telescopic cylinder 6, which is connected to a second drive rod 601. The second drive rod 601 is threadedly connected to the first insulating connecting seat 12, which facilitates the disassembly and assembly of the first insulating connecting seat 12. The thread direction on the second drive rod 601 is the same as the thread direction of the first screw head 13. That is, after the second drive rod 601 is connected to the first insulating connecting seat 12, when the conductive voltage tightening plate 14 is tightened, the second drive rod 601 and the first insulating connecting seat 12 will be further tightened, instead of being loosened in the opposite direction.

[0040] The first telescopic cylinder 3 is connected to a wing plate 5, and a screw 4 threaded through the wing plate 5 is threaded to the first bracket 1; the second telescopic cylinder 6 is also connected to a wing plate 5, and a screw 4 threaded through the wing plate 5 is threaded to the second bracket 2, which facilitates the disassembly and replacement of the first telescopic cylinder 3 and the second telescopic cylinder 6.

[0041] The first insulating connector 12 and the second insulating connector 23 can be made of ceramic material to ensure insulation performance while maintaining structural strength.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum interrupter opening distance testing device, comprising a first support (1) and a second support (2) disposed on the first support (1), wherein the first support (1) is provided with a plurality of first driving mechanisms for pulling down the movable conductive rod (101), characterized in that, The second bracket (2) is equipped with several second drive mechanisms for vertical lifting. The second drive mechanism is connected to a first insulating connecting seat (12). The first insulating connecting seat (12) is connected to a voltage-conducting clamping plate (14). A conductive connector (7) is clamped between the first insulating connecting seat (12) and the voltage-conducting clamping plate (14). A conductive cap (17) is connected to the lower end of the voltage-conducting clamping plate (14).

2. The vacuum interrupter chamber pull-out distance testing device according to claim 1, characterized in that, The lower end of the voltage-conducting plate (14) is connected to a conductive slide rod (15), which slides in conjunction with the conductive cap (17). A spring (16) is connected between the voltage-conducting plate (14) and the conductive cap (17).

3. The pull-open distance test device for a vacuum interrupter according to claim 1, wherein The upper end face of the conductive pressure plate (14) is connected to a first screw head (13) that can be moved through the conductive connector (7), and the first screw head (13) is threadedly connected to the first insulating connector (12).

4. The pull-open distance test device for a vacuum interrupter according to claim 1, wherein The first driving mechanism includes a first telescopic cylinder (3) installed below the first bracket (1). The first telescopic cylinder (3) is connected to a first driving rod (301). A second insulating connecting seat (23) is connected to the first driving rod (301). A conductive seat (18) is connected to the second insulating connecting seat (23). A groove (20) is provided on the upper end face of the conductive seat (18). A connecting groove (21) and a limiting groove (22) are provided on one side of the conductive seat (18). The connecting groove (21) communicates with the side wall of the groove (20) and the upper end face of the conductive seat (18). The limiting groove (22) communicates with the bottom of the groove (20) and the contact surface of the limiting groove (22) and the groove (20) forms a step. An annular groove (103) for engaging the groove (20) is provided on the moving conductive rod (101).

5. The vacuum interrupter chamber pull-out distance testing device according to claim 4, characterized in that, The first bracket (1) is fixedly provided with a placement seat (8), and a through groove (9) is vertically opened in the placement seat (8). The side wall of the placement seat (8) is provided with a relief groove (11) for avoiding the moving conductive rod (101) along the direction of the annular groove (103) being inserted into the groove (20).

6. A pull-open distance test device for a vacuum interrupter according to claim 5, characterized in that The side wall of the placement seat (8) is provided with a placement groove (10) that communicates with the upper end face of the placement seat (8) along the direction in which the annular groove (103) is inserted into the groove (20).

7. The vacuum interrupter chamber pull-out distance testing device according to claim 4, characterized in that, The upper end of the first drive rod (301) and the lower end of the conductive seat (18) are both provided with a second screw head (19) that is threadedly connected to the second insulating connecting seat (23).

8. The pull-open distance testing device of a vacuum interrupter according to claim 1, wherein, The second drive mechanism includes a second telescopic cylinder (6), which is connected to a second drive rod (601), and the second drive rod (601) is threadedly connected to the first insulating connecting seat (12).

Images