Vacuum arc-extinguishing chamber test operation device

Abstract

The invention relates to the field of static or dynamic balance testing of machines or structural parts, in particular to a vacuum arc-extinguishing chamber test operation device. The device comprises a rack, the bottom of the rack is provided with a static end support, the top of the static end support is provided with a connecting hole used for fixing the static end of the vacuum arc-extinguishing chamber, the top of the rack is provided with a shaft seat, the shaft seat is rotatably provided with a horizontal rotating shaft, and the horizontal rotating shaft forms a test shaft used for representing the moving speed and position of a moving contact of the arc-extinguishing chamber. An input connecting lever and an output connecting lever are arranged on the horizontal rotating shaft, the output connecting lever is connected with an output connecting rod, the output connecting rod is connected with a closing retaining spring assembly and a contact finger seat, and a guide cylinder which is in vertical guide fit with the contact finger seat is detachably arranged at the top of the rack; the guide cylinder is vertically opposite to the static end support, and the input crank arm is connected with an operating mechanism used for operating the arc extinguish chamber. The vacuum arc-extinguishing chamber mechanical life test device solves the problems of poor test result precision and poor adaptability of the existing vacuum arc-extinguishing chamber mechanical life test device.

Description

Technical Field

[0001] The invention relates to the field of static or dynamic balance testing of machines or structural components, and in particular to a vacuum interrupter test operating device. Background Art

[0002] The application technology of vacuum interrupter in switchgear of 40.5kV and below is relatively mature, but it is rarely used in switchgear of 72.5kV and above. Therefore, when it is applied to 126kV or higher voltage level (such as 145kV), it is necessary to conduct preliminary mechanical life test to determine whether it can work normally.

[0003] In the prior art, the mechanical life of a 126kV vacuum interrupter is mainly verified by testing switch products. The results obtained by this test method cannot directly indicate the mechanical life of the vacuum interrupter without being affected by other structures. In order to clearly understand the mechanical life characteristics of the vacuum interrupter without being affected by other structures, it is necessary to conduct a mechanical life test on the vacuum interrupter in addition to the switch product.

[0004] In order to realize the mechanical life test of vacuum interrupter outside the switch product, the Chinese utility model patent with the authorization announcement number CN201429511Y discloses a mechanical life test device for vacuum interrupter. The test device includes a frame, a power supply control part, a motion mechanism part and a metering part. The frame includes a column, a bottom plate at the bottom of the column, and a support plate and a pressure plate arranged at the top of the column. The support plate is provided with a through hole for the moving end conductive rod of the vacuum interrupter to pass through. When in use, the moving end of the vacuum interrupter can be supported downward on the support plate, and the support plate supports the shell of the interrupter. The static end of the vacuum interrupter is pressed by the pressure plate to fix its position. The motion mechanism includes a connecting rod installed on the bottom plate and can cooperate with the bottom plate guide in the up and down directions. A spring is arranged between the connecting rod and the bottom plate to drive the connecting rod to move upward. A driving device is arranged below the frame. The driving device includes a motor and a cam connected to the motor through a belt drive. The cam cooperates with the lower end of the connecting rod to form a cam mechanism. During the test, the cam is driven to rotate by the motor, and the connecting rod reciprocates up and down under the joint action of the cam and the above-mentioned spring, thereby realizing the operation of the vacuum interrupter.

[0005] Although the above-mentioned vacuum interrupter mechanical life test device can realize the independent operation of the vacuum interrupter to detect its own mechanical life, the vacuum interrupter often requires a very fast opening and closing speed during operation, and its movable end conductive rod is often equipped with components such as a closing holding spring. Whether the closing holding spring is configured will directly affect the mechanical life of the vacuum interrupter, and the above-mentioned test device does not take these factors into consideration, resulting in a certain degree of deviation in the test results. In addition, the structure of each part of the above-mentioned device is fixed, and the relative position between the parts is fixed, so it can only be applied to the test of a single model of vacuum interrupter, and there is a problem of poor adaptability. Summary of the invention

[0006] The object of the present invention is to provide a vacuum interrupter test operating device to solve the problems of poor test result accuracy and poor adaptability to different types of vacuum interrupters in existing vacuum interrupter mechanical life test devices.

[0007] In order to solve the above problems, the vacuum interrupter test operation device of the present invention adopts the following technical solutions: A vacuum interrupter test operation device comprises a frame, wherein a static end support for supporting the static end of the vacuum interrupter is arranged at the bottom of the frame, a connecting hole for fixing the static end of the vacuum interrupter is arranged at the top of the static end support, an axle seat is arranged at the top of the frame, a horizontal rotating shaft is rotatably mounted on the axle seat, the horizontal rotating shaft constitutes a test shaft for characterizing the movement speed and position of the moving contact of the interrupter, an input crank arm and an output crank arm are arranged on the horizontal rotating shaft, the output crank arm is connected to an output connecting rod, the output connecting rod is connected to a closing holding spring assembly and a contact finger seat, a guide cylinder which cooperates with the vertical guide of the contact finger seat is detachably mounted on the top of the frame; the guide cylinder is vertically opposite to the static end support, the input crank arm is connected to an operating mechanism for operating the interrupter, and the operating mechanism is fixedly mounted on the frame.

[0008] Furthermore, the guide cylinder comprises a cylinder body and a flange plate arranged at the upper end of the cylinder body, and the guide cylinder is connected to the frame flange through the flange plate.

[0009] Furthermore, the frame includes a top plate, and a reinforcement block is arranged on the top plate at a position corresponding to the flange.

[0010] Furthermore, the frame includes a bottom frame, columns arranged on the bottom frame, and a top frame arranged on top ends of the columns, and the bottom frame is provided with a bottom beam for fixed connection with the ground.

[0011] Furthermore, the columns surround a vertical frame, a side support is provided on one side of the vertical frame, a top support is provided on the top frame, and the operating mechanism is installed on the frame through the side support and the top support.

[0012] Furthermore, one end of the bottom beam extends toward the side where the side support is located.

[0013] Furthermore, the bottom frame and the columns, as well as the columns and the top frame are detachably connected via fasteners.

[0014] Furthermore, the parts of the bottom frame are detachably connected via fasteners.

[0015] Furthermore, the parts of the top frame are detachably connected via fasteners.

[0016] Furthermore, contact fingers and guide rings are installed on the contact finger seat.

[0017] Beneficial effects: The present invention is a pioneering invention. Specifically, since the appearance dimensions of vacuum arc chambers of different models mainly differ in height and outer diameter, and the static end connection structure is unified, the present invention can support the installation of vacuum arc chambers of different models through the static end, and test vacuum arc chambers of different models by replacing the detachable guide cylinders and contact finger seats and connecting rods of different sizes, thereby ensuring the adaptability of the device to vacuum arc chambers of different models; in addition, since the guide cylinder, contact seat, horizontal rotating shaft, input crank arm, output crank arm and operating mechanism are provided, the mechanical environment of the vacuum arc chamber during operation can be highly restored, which helps to ensure the reliability of the test results; the horizontal rotating shaft is used as a test axis to characterize the movement speed and position of the moving contact of the arc chamber, which is convenient for cooperating with relevant test instruments such as encoders to automatically and accurately obtain the test results. In summary, the vacuum arc chamber test operation device of the present invention solves the problems of poor test result accuracy and poor adaptability to vacuum arc chambers of different models in the existing vacuum arc chamber mechanical life test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a vacuum interrupter test operation device of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the static end support and the device base; Figure 3 yes Figure 1 The structural diagram of the rack in FIG. Figure 4 It is a structural schematic diagram of the support seat of the static end support; Figure 5 yes Figure 1 A partial perspective view of the device; Figure 6 yes Figure 5 Schematic diagram of the installation of the horizontal shaft in FIG. Figure 7 yes Figure 5 A schematic diagram of the structure of the guide cylinder; Figure 8 yes Figure 5 A schematic diagram of the structure of the contact finger seat; Fig. 9 yes Figure 5 Schematic diagram of the structure of the closing holding spring assembly.

[0019] In the figure: 101, frame; 11, reinforcement block; 12, column; 13, bottom beam; 14, side support; 15, top support; 102, static end support; 21, insulating pillar; 22, support seat; 23, connecting hole; 103, shaft seat; 31, support ear plate; 104, horizontal shaft; 41, input crank arm; 42, output crank arm; 43, test device connection port; 105, operating mechanism; 106, output connecting rod; 107, guide cylinder; 71, cylinder body; 72, flange; 108, closing holding spring assembly; 81, slider; 82, plug; 83, spring; 84, support cylinder; 109, contact finger seat; 91, contact finger groove; 92, guide ring mounting groove. DETAILED DESCRIPTION

[0020] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0021] The vacuum arc chamber mainly uses vacuum brazing to connect the porcelain shell, end cover plate, bellows and other structures together. After welding, the interior is in a vacuum state and the exterior is in atmospheric pressure. During design, it is necessary to ensure that the vacuum degree and mechanical properties inside the arc chamber will not change due to abnormal arc chamber connection structure. Therefore, it is necessary to test and verify the mechanical life of the vacuum arc chamber. The vacuum arc chamber test operation device of the present invention is to assist in completing the above test, mainly providing the drive required for the vacuum arc chamber test.

[0022] The mechanical properties of the vacuum arc chamber can be determined by checking the appearance during the test to determine the reliability of the arc chamber welding structure and the bellows connection, such as obvious cracks in the weld and cracks in the bellows connection position. It can also be determined by whether there is a large change in the closing speed of the arc chamber to indirectly determine whether there is an abnormality in the welding structure of the arc chamber. If the closing speed is significantly reduced, it can be explained that there is a possibility of air intake in the arc chamber. Therefore, whether the mechanical motion characteristics and environment of the vacuum arc chamber can be highly restored during operation will have a crucial impact on the reliability of the test results. In addition, the appearance dimensions of vacuum arc chambers of different models mainly differ in height and outer diameter. The present invention will also utilize this feature of the vacuum arc chamber to test different models of vacuum arc chambers through a single device, so as to improve the adaptability of the device to different models of vacuum arc chambers, that is, versatility.

[0023] Based on the above inventive concept, the present invention provides a basic solution. Figure 1 , 5As shown, in this basic scheme, the vacuum interrupter test operation device includes a frame 101. In the entire device, the frame 101 will mainly play two roles, one is to integrate various other components, and the other is to achieve the installation and positioning of the tested vacuum interrupter 1001. Therefore, under the condition of ensuring the stability and strength of the frame 101, no matter what type of frame 101 is used, for example, a frame type, a closed type, etc. are all acceptable.

[0024] A static end support 102 is provided at the bottom of the rack 101. The static end support 102 can be borrowed from the static end support structure of the 126kV environmental GIS circuit breaker, which includes a lower insulating support 21 and a support seat 22 fixed at the upper end of the insulating support 21. Figure 4 As shown, the top surface of the support base 22 is set to be a plane, and a connecting hole 23 is set in the middle to connect the static end conductor of the vacuum arc chamber 1001. Since the top surface of the support base 22 is set to be a plane, it can be quickly connected to the static end conductor of vacuum arc chambers of different models. This is because the positions of the connecting holes on the static end conductors of vacuum arc chambers of different models are consistent. Here, the present invention utilizes this feature of the vacuum arc chamber series products.

[0025] A shaft seat 103 is provided on the top of the frame 101. Figure 6 As shown, the shaft seat 103 includes two supporting ear plates 31 arranged in parallel and spaced apart. A horizontal rotating shaft 104 is installed on the top of the frame 101 through the shaft seat 103. An input crank arm 41 and an output crank arm 42 are respectively arranged on the horizontal rotating shaft 104, wherein the input crank arm 41 can be an integrated structure with the horizontal rotating shaft 104, or can be made separately and fixed on the horizontal rotating shaft 104. The input crank arm 41 is connected to an operating mechanism 105. The operating mechanism 105 can use the operating mechanism of the circuit breaker to output the force and action to drive the vacuum arc chamber 1001 to move. The operating mechanism 105 is fixed to the upper part of the frame 101. The output crank arm 42 is connected to the output connecting rod 106, which can be connected to the moving contact of the vacuum interrupter to drive its reciprocating motion. It can be seen that the motion of the horizontal rotating shaft 104 maintains a specific relationship with the motion of the moving contact of the vacuum interrupter 1001. Therefore, the horizontal rotating shaft 104 is used as a test axis to characterize the motion speed and position of the moving contact of the interrupter, and the motion speed, position and other information of the moving contact of the vacuum interrupter 1001 can be easily collected. Therefore, a measuring device connection port 43 is set at the center of one end of the horizontal rotating shaft 104, which can be used in conjunction with an existing circuit breaker mechanical characteristic measuring device.

[0026] In order to fully restore the mechanical environment of the vacuum interrupter during operation, a guide cylinder 107 is also provided on the top of the frame 101. Figure 7As shown, the guide cylinder 107 is detachably connected to the frame 101, and can be easily replaced when testing different types of vacuum interrupters. The guide cylinder 107 and the static end support 102 are vertically opposite, and the output connecting rod 106 is located in the guide cylinder 107, and the lower end thereof is connected to the closing holding spring assembly 108 and the contact finger seat 109 in sequence, wherein the closing holding spring assembly 108 and the contact finger seat 109 can adopt the existing structure of the vacuum circuit breaker, such as Fig. 9 As shown, the closing holding spring assembly 108 includes a slider 81, a plug 82, a spring 83, a support tube 84, etc. Figure 8 As shown, the contact finger seat 109 is provided with a contact finger groove 91 and a guide ring mounting groove 92 for mounting the contact finger and the guide ring respectively.

[0027] As a preferred embodiment, the guide cylinder 107 includes a cylinder body 71 and a flange 72 disposed at the upper end of the cylinder body 71. The guide cylinder 107 is detachably fixed to the frame 101 by the flange 72 cooperating with the frame 101. Specifically, the frame 101 includes a top plate, and a reinforcement block 11 is disposed on the top plate at a position corresponding to the flange, thereby ensuring the strength of the connection between the guide cylinder 107 and the frame 101, thereby ensuring reliability. Of course, in some other embodiments, the guide cylinder 107 can also be detachably connected to the frame by providing a flange on the periphery and pressing with a pressure plate, or a joint is provided on the frame, and the guide cylinder is fixed to the top of the frame by threaded cooperation or plugging with the joint.

[0028] In order to simplify the structure of the frame 101 and reduce its weight, as a preferred embodiment, Figure 3 As shown, the rack 101 is configured to include a bottom frame, a column 12 disposed on the bottom frame, and a top frame disposed on the top of the column 12, wherein the bottom frame is provided with a bottom beam 13 for fixed connection with the ground, and the rack 101 can be fixed to the ground of the test site when in use to ensure its stability during operation. The columns 12 surround the frame, a side support 14 is provided on one side of the frame, and a top support 15 is provided on the top frame, and the operating mechanism 105 is installed on the rack 101 through the side support 14 and the top support 15. In order to further ensure stability, one end of the bottom beam 13 extends to the side where the side support 14 is located. Of course, in other embodiments, the top, bottom and side wall parts of the rack can all adopt a plate structure, in which case, the material used for the rack 101 may be increased, but it will also bring better protection effect and ensure safety during the test process. Of course, in order to fix the static end support, no matter what structure the frame adopts, a support body, that is, a device base, must be set at the bottom to install the static end support, such as Figure 2 As shown, the support body can adopt a plate structure.

[0029] In order to facilitate the assembly and disassembly of the rack 101, in a preferred embodiment, the bottom frame and the upright column 12, the upright column 12 and the top frame are detachably connected by fasteners, and the parts of the bottom frame are detachably connected by fasteners; the parts of the top frame are detachably connected by fasteners. All of the above parts are made of plate materials.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. Vacuum interrupter test operation device, characterized in that: The invention comprises a frame, wherein a static end support for supporting the static end of a vacuum arc extinguishing chamber is arranged at the bottom of the frame, a connecting hole for fixing the static end of the vacuum arc extinguishing chamber is arranged at the top of the static end support, an axle seat is arranged at the top of the frame, a horizontal rotating shaft is rotatably mounted on the axle seat, the horizontal rotating shaft constitutes a test shaft for characterizing the movement speed and position of the moving contact of the arc extinguishing chamber, an input crank arm and an output crank arm are arranged on the horizontal rotating shaft, the output crank arm is connected to an output connecting rod, the output connecting rod is connected to a closing holding spring assembly and a contact finger seat, a guide cylinder which cooperates with the vertical guide of the contact finger seat is detachably mounted on the top of the frame; the guide cylinder is vertically opposite to the static end support, the input crank arm is connected to an operating mechanism for operating the arc extinguishing chamber, and the operating mechanism is fixedly mounted on the frame.

2. The vacuum interrupter test operation device according to claim 1, characterized in that: The guide cylinder comprises a cylinder body and a flange plate arranged at the upper end of the cylinder body, and the guide cylinder is connected to the frame flange through the flange plate.

3. The vacuum interrupter test operation device according to claim 2, characterized in that: The frame comprises a top plate, and a reinforcement block is arranged on the top plate at a position corresponding to the flange.

4. The vacuum interrupter test operation device according to claim 1, characterized in that: The frame comprises a bottom frame, columns arranged on the bottom frame and a top frame arranged on the top ends of the columns. A bottom beam for fixedly connecting with the ground is arranged on the bottom frame.

5. The vacuum interrupter test operation device according to claim 4, characterized in that: The columns surround a vertical frame, a side support is arranged on one side of the vertical frame, a top support is arranged on the top frame, and the operating mechanism is installed on the frame through the side support and the top support.

6. The vacuum interrupter test operation device according to claim 5, characterized in that: One end of the bottom beam extends toward the side where the side support is located.

7. The vacuum interrupter test operation device according to claim 4, characterized in that: The bottom frame and the upright column, as well as the upright column and the top frame are detachably connected via fasteners.

8. The vacuum interrupter test operation device according to claim 4, characterized in that: The parts of the bottom frame are detachably connected via fasteners.

9. The vacuum interrupter test operation device according to claim 4, characterized in that: The parts of the top frame are detachably connected via fasteners.

10. The vacuum interrupter test operation device according to claim 1, characterized in that: The contact finger seat is provided with contact fingers and a guide ring.

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