Vacuum arc-extinguishing chamber testing device

Abstract

The utility model relates to the technical field of vacuum arc-extinguishing chamber testing, in particular to a vacuum arc-extinguishing chamber testing device, which comprises a detection frame and a detection mechanism arranged on the detection frame. The detection mechanism comprises two mounting plates symmetrically arranged on the detection frame in the length direction of the detection frame, threaded sleeves arranged on the mounting plates, and a first screw rod and a second screw rod which are in threaded connection with the two threaded sleeves respectively; a pressure applying assembly and an adjusting block assembly are arranged at the opposite ends of the first screw rod and the second screw rod correspondingly, the pressure applying assembly and the adjusting block assembly are rotationally connected with the first screw rod and the second screw rod correspondingly, a limiting clamp is arranged on one mounting plate, and the limiting clamp is in horizontal sliding fit with the pressure applying assembly; the rotation of the screw rod is controlled by the crank to apply and adjust the pressure, and an operator can complete the test operation; the integrated design organically combines the functions of clamping, pressure applying and pressure monitoring, so that tedious step-by-step operation by using various scattered tools or equipment is avoided, the test process is simplified, and the test time is saved.

Description

Technical Field

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

[0002] In vacuum interrupter circuit resistance testing, existing clamping devices are often complex in structure and lack versatility, making it difficult to adapt to vacuum interrupters of different specifications. This results in the inability to stably fix the interrupter during testing, affecting the accuracy of the test. Moreover, in terms of pressure application, there is a lack of precise control methods, making it impossible to accurately apply the required pressure to the vacuum interrupter, leading to large fluctuations in test results that fail to truly reflect the performance of the interrupter. In addition, most traditional testing equipment lacks pressure monitoring functions, preventing operators from understanding the pressure situation in real time, further increasing the possibility of test errors and hindering the quality assessment and performance optimization of vacuum interrupters. Utility Model Content

[0003] The purpose of this invention is to provide a vacuum interrupter testing device to solve the problems existing in the prior art mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a vacuum interrupter testing device, comprising a testing frame and a testing mechanism mounted on the testing frame. The testing mechanism includes two mounting plates symmetrically mounted on the testing frame along its length, threaded sleeves mounted on the mounting plates, and a first screw and a second screw respectively threadedly connected to the two threaded sleeves. A pressure-applying component and an adjusting component are respectively provided at opposite ends of the first screw and the second screw. The pressure-applying component and the adjusting component are rotatably connected to the first screw and the second screw, respectively. A limiting clamp is provided on one of the mounting plates, and the limiting clamp is horizontally slidingly engaged with the pressure-applying component.

[0005] Furthermore, the pressure application assembly includes a rotating cylinder rotatably connected to one end of the first screw, a limiting block disposed on the rotating cylinder, and a force sensor disposed on the limiting block; the limiting block is slidably engaged with the limiting clamp, and a lifting block is threadedly connected to the end of the rotating cylinder.

[0006] Furthermore, the adjusting assembly includes a rotating block rotatably connected to one end of the second screw and an adjusting block threadedly connected to the rotating block.

[0007] Furthermore, the testing frame is provided with a central pad located between two threaded sleeves, and a semi-circular placement groove is formed on the central pad. The first screw and the second screw are arranged coaxially with the semi-circular placement groove.

[0008] Furthermore, a crank handle is connected to the other end of the first screw.

[0009] Furthermore, the detection frame is symmetrically provided with two baffles located on both sides of the central pad along the width direction.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. Precise pressure control and measurement; the application of an external screw-type bidirectional force sensor enables precise measurement and real-time monitoring of applied pressure; in loop resistance testing, the pressure can be precisely controlled according to the test standard to ensure consistent pressure conditions for each test, greatly improving the accuracy and reliability of test results; compared with traditional testing methods, it effectively avoids test errors caused by improper pressure control, providing a strong guarantee for accurately evaluating the performance of the vacuum interrupter.

[0012] 2. Stable and reliable clamping structure: Through the coordinated action of two mounting plates, threaded sleeves, screws, and pressure and adjustment components, vacuum interrupters of different specifications can be firmly clamped; the central pad and baffle further enhance the stability and reliability of clamping, preventing displacement or shaking of the vacuum interrupter during testing, ensuring the uniformity of force on the vacuum interrupter during testing, reducing measurement errors caused by clamping instability, and improving testing efficiency and quality.

[0013] 3. Improved testing efficiency and convenience: This device has a compact structure, reasonable design, and is easy to operate. Pressure is applied and adjusted by controlling the rotation of the screw with a crank handle, allowing operators to complete testing operations easily and quickly. At the same time, the integrated design organically combines clamping, pressurizing, and pressure monitoring functions, avoiding the need for cumbersome step-by-step operations using multiple separate tools or equipment, simplifying the testing process, saving testing time, and making it particularly suitable for large-scale vacuum interrupter testing, effectively improving overall testing efficiency. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present invention;

[0015] Figure 2 This is a partial structural diagram of the present utility model.

[0016] In the picture:

[0017] 1. Testing frame; 2. Mounting plate; 3. Threaded sleeve; 4. First screw; 5. Second screw; 6. Pressure application assembly; 7. Adjustment assembly; 8. Limit clamp; 9. Rotating cylinder; 10. Limit block; 11. Force sensor; 12. Lifting block; 13. Rotating block; 14. Adjustment block; 15. Center pad; 16. Handle; 17. Baffle. Detailed Implementation

[0018] Please see Figures 1 to 2A vacuum interrupter testing device includes a testing frame 1 and a testing mechanism mounted on the testing frame 1. In use, the testing frame 1 is placed stably on a workbench, ensuring its secure installation. Two mounting plates 2 are symmetrically installed along the length of the testing frame 1. Threaded sleeves 3 are installed on the mounting plates 2, ensuring their perpendicularity and coaxiality. Then, a first screw 4 and a second screw 5 are screwed into the two threaded sleeves 3 respectively. A crank handle 16 is securely connected to the other end of the first screw 4 for subsequent operation. A central pad 15 is installed on the testing frame 1 between the two threaded sleeves 3. The size of its semi-circular placement groove must match the vacuum interrupter to be tested, ensuring that the first screw 4 and the second screw 5 are coaxially aligned with the semi-circular placement groove. Two baffles 17 are symmetrically installed on both sides of the central pad 15 along the width of the testing frame 1, such that the distance between the baffles 17 and the central pad 15 is slightly larger than the diameter of the vacuum interrupter, effectively preventing the vacuum interrupter from tilting laterally. The mechanism is designed for easy movement, placement, and removal. For the pressure application component 6, the rotating cylinder 9 is connected to one end of the first screw 4 via a bearing or similar rotary connection to allow for flexible rotation. A limiting block 10 is fixed on the rotating cylinder 9, and a force sensor 11, specifically an external screw-type bidirectional force sensor, is installed on the limiting block 10, ensuring the force sensor 11 is securely installed and correctly wired (if external monitoring equipment is required). A lifting block 12 is threaded onto the end of the rotating cylinder 9, allowing for flexible position adjustment. A limiting clamp 8 on one of the mounting plates 2 is slidably engaged with the limiting block 10 of the pressure application component 6, ensuring smooth horizontal movement of the pressure application component 6 without significant shaking. The adjustment component 7 connects the rotating block 13 to one end of the second screw 5 via a suitable rotary connection structure (e.g., a bearing) to ensure flexible rotation. An adjustment block 14 is then threaded onto the rotating block 13, with the thread precision of the adjustment block 14 meeting the adjustment requirements for accurate position adjustment.

[0019] During testing, the vacuum interrupter to be tested is placed in the semi-circular placement groove of the central pad 15, so that the axis of the vacuum interrupter coincides with the axis of the first screw 4 and the second screw 5. The crank handle 16 is slowly turned, causing the first screw 4 to rotate in the threaded sleeve 3. Due to the limiting effect of the limiting clamp 8, the rotating cylinder 9 of the pressure application component 6 can only move smoothly towards the vacuum interrupter in the horizontal direction. The lifting block 12 gradually approaches the moving contact of the vacuum interrupter and begins to apply pressure. During the pressure application process, the external screw type tension and compression bidirectional force sensor 11 monitors the pressure in real time and transmits the data to the connected monitoring equipment (such as a pressure display or data acquisition system). The operator can accurately control the rotation angle and force of the crank handle 16 by observing the data on the monitoring equipment according to the test standards and requirements, thereby accurately adjusting the applied pressure. The pressure applied to the vacuum interrupter is adjusted according to the length of the vacuum interrupter and the test requirements. The adjusting block 14 on the second screw 5 is rotated to ensure it is in close contact with the other end of the vacuum interrupter and adjusted to a suitable position. This further stabilizes the placement of the vacuum interrupter, ensuring uniform and stable force distribution during the test and preventing uneven force from affecting the test results. Once the applied pressure reaches the required test value, the crank handle 16 is stopped, and the pressure is maintained. Then, a professional loop resistance testing instrument (not detailed in this device) is connected to the corresponding test point on the vacuum interrupter, and the loop resistance test is performed according to the standard test procedure. After the test is completed, the crank handle 16 is slowly rotated in the opposite direction to move the pressure application component 6 away from the vacuum interrupter. The tested vacuum interrupter is then carefully removed, completing the test operation.

[0020] The lifting block 12 and the adjusting block 14 are respectively adapted to the two ends of the vacuum interrupter. For some incompatible vacuum interrupters, the lifting block 12 and the adjusting block 14 can be removed and the two ends of the vacuum interrupter can be fixed by threaded connection in order to apply pressure.

[0021] The working principle of this utility model is as follows: The semi-circular placement groove of the central pad 15 provides a preliminary positioning and support foundation for the vacuum interrupter, enabling it to be stably placed on the test frame 1; the first screw 4 and the second screw 5 achieve relative linear movement under the threaded transmission action in the threaded sleeve 3; when the first screw 4 is rotated, the pressure application component 6, guided and restricted by the limiting clamp 8, can only move horizontally towards the vacuum interrupter, while the adjustment component 7 on the second screw 5 can be adjusted according to the actual length of the vacuum interrupter, so that the vacuum interrupter is reliably clamped between the lifting block 12 and the adjusting block 14; the baffles 17 on both sides effectively block the lateral displacement of the vacuum interrupter in the horizontal direction, ensuring that the position of the vacuum interrupter remains fixed throughout the test, providing stable conditions for accurately testing the circuit resistance.

[0022] When the first screw 4 is rotated, its axial movement is transmitted to the lifting block 12 at the end through the rotating cylinder 9, thereby applying pressure to the vacuum interrupter. Since the rotating cylinder 9 and the first screw 4 are rotatably connected, during the rotation of the first screw 4, the rotating cylinder 9 only translates horizontally and does not rotate with the screw, ensuring that the pressure application direction is always perpendicular to the end face of the vacuum interrupter and that the pressure is evenly distributed. The external screw-type tension-compression bidirectional force sensor 11 is installed on the limiting block 10. When the lifting block 12 applies pressure, the force is transmitted to the force sensor 11 through the rotating cylinder 9 and the limiting block 10. This sensor works based on the strain gauge principle. When subjected to external force, the strain gauge deforms, causing its resistance value to change. The change in resistance value is converted into an electrical signal by a measuring bridge circuit. After amplification and processing, the applied pressure can be accurately measured and displayed or transmitted to external equipment in real time. The operator can accurately control the rotation of the first screw 4 based on the pressure data fed back by the sensor, thereby achieving precise control and adjustment of the applied pressure and meeting the pressure requirements of the vacuum interrupter under different test conditions.

Claims

1. A vacuum interrupter testing device, comprising a testing frame (1) and a testing mechanism disposed on the testing frame (1), characterized in that, The testing mechanism includes two mounting plates (2) symmetrically arranged on the testing frame (1) along the length direction of the testing frame (1), threaded sleeves (3) on the mounting plates (2), and a first screw (4) and a second screw (5) respectively threadedly connected to the two threaded sleeves (3); a pressure application component (6) and an adjustment component (7) are respectively provided on the opposite ends of the first screw (4) and the second screw (5), the pressure application component (6) and the adjustment component (7) are rotatably connected to the first screw (4) and the second screw (5), and a limiting clamp (8) is provided on one of the mounting plates (2), the limiting clamp (8) and the pressure application component (6) are horizontally slidingly engaged.

2. The vacuum interrupter chamber testing device as described in claim 1, characterized in that, The pressure application assembly (6) includes a rotating cylinder (9) rotatably connected to one end of the first screw (4), a limiting block (10) provided on the rotating cylinder (9), and a force sensor (11) provided on the limiting block (10); the limiting block (10) is slidably engaged with the limiting clamp (8), and a lifting block (12) is threadedly connected to the end of the rotating cylinder (9).

3. The vacuum interrupter chamber testing device as described in claim 2, characterized in that, The adjustment assembly (7) is rotatably connected to one end of the second screw (5) by a rotating block (13) and an adjustment block (14) threadedly connected to the rotating block (13).

4. The vacuum interrupter chamber testing device as described in claim 1, characterized in that, The testing frame (1) is provided with a central pad (15) located between two threaded sleeves (3). A semi-circular placement groove is provided on the central pad (15). The first screw (4) and the second screw (5) are arranged coaxially with the semi-circular placement groove.

5. The vacuum interrupter chamber testing device as described in claim 3, characterized in that, A crank handle (16) is connected to the other end of the first screw (4).

6. The vacuum interrupter chamber testing device as described in claim 4, characterized in that, The testing frame (1) is symmetrically provided with two baffles (17) on both sides of the central pad (15) along the width direction.

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