Pressure resistance detection device for corrugated pipe of vacuum arc-extinguishing chamber

Abstract

The utility model provides a vacuum arc-extinguishing chamber corrugated pipe compression resistance detection device, and relates to the field of power equipment detection. The vacuum arc-extinguishing chamber corrugated pipe compression resistance detection device comprises a mounting base, a positioning mechanism, a detection mechanism and a pressure sensor are arranged on the upper side of the mounting base, the positioning mechanism comprises a bearing assembly and a clamping assembly, and the detection mechanism comprises a cam assembly and an adjusting assembly used for driving the cam assembly to move. The cam assembly comprises a cam and a first servo motor driving the cam to rotate, and the periphery of the cam is rotationally connected with a plurality of evenly-distributed roller shafts. According to the pressure resistance detection device for the corrugated pipe of the vacuum arc-extinguishing chamber, the cam is driven by the servo motor to rotate, and the single-point impact force of the cam is converted into uniformly distributed dynamic pressure by combining rolling contact of peripheral roll shafts, so that high-precision pressure application and uniform stress are realized, local overload of the corrugated pipe is avoided, and the test accuracy is improved.

Description

Technical Field

[0001] This application relates to the field of power equipment testing technology, specifically a pressure testing device for a vacuum interrupter bellows. Background Technology

[0002] Vacuum interrupters are core components of high-voltage switchgear in power systems. Their bellows, as dynamic sealing elements, must withstand alternating stresses from mechanical compression and vacuum environments over long periods. The pressure resistance of the bellows directly affects the service life and operational reliability of the interrupter; therefore, it must undergo rigorous pressure testing before leaving the factory.

[0003] Currently, the industry mainly relies on static pressure testing or simple dynamic pressure application devices for bellows inspection. However, existing technologies have the following problems: Traditional testing devices often use hydraulic cylinders or pneumatic cylinders to directly apply static pressure to the bellows, or use mechanical structures such as a single cam or swing arm for dynamic pressure application. These methods easily lead to localized stress concentration in the bellows, failing to simulate the uniform stress state under actual working conditions, resulting in large deviations in test results, and may even cause premature damage to the bellows due to localized overload.

[0004] To address the aforementioned issues, a pressure testing device for the bellows of a vacuum interrupter is proposed. This device transforms the single-point impact force of the cam into a uniformly distributed dynamic pressure, achieving high-precision pressure application and uniform force distribution, thereby preventing localized overload of the bellows. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this application provides a pressure testing device for the bellows of a vacuum interrupter, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this application provides the following technical solution: a pressure testing device for a bellows of a vacuum interrupter, comprising a mounting base, wherein a positioning mechanism, a testing mechanism, and a pressure sensor are provided on the upper side of the mounting base, the positioning mechanism comprises a supporting component and a clamping component, the testing mechanism comprises a cam component and an adjusting component for moving the cam component, the cam component comprises a cam and a first servo motor for driving the cam component to rotate, and a plurality of evenly distributed rollers are rotatably connected to the periphery of the cam component;

[0009] By adopting the above technical solution, multiple rollers are uniformly embedded in the outer circumference of the cam, and the rollers can rotate freely around their own axis.

[0010] Preferably, the back of the cam is fixedly mounted with a mounting groove, the output end of the first servo motor is fixedly connected with a mounting head that matches the mounting groove, and a bolt for fixing is threaded onto one side of the mounting groove.

[0011] By adopting the above technical solution, the cam is inserted into the mounting head of the first servo motor through the mounting groove and locked by bolts, which enables the replacement of the cam model.

[0012] Preferably, the support assembly includes a support base, on the inner walls of both sides of the support base are fixedly installed with rotating rollers for supporting the corrugated pipe, and positioning plates are fixedly installed at the four corners of the support base. Four guide columns that penetrate the positioning plates are fixedly installed on the upper side of the mounting base, and the positioning plates are slidably connected to the guide columns.

[0013] By adopting the above technical solution, the support base is slidably connected to the guide column of the mounting base through the positioning plates at the four corners. During the test, it can be ensured that the support base can press down on the pressure sensor. The rotating rollers installed symmetrically on the inner walls of both sides of the support base are adapted to the diameter of the corrugated pipe to support the corrugated pipe and reduce friction.

[0014] Preferably, there are two sets of clamping components, and the two sets of clamping components are symmetrically arranged on both sides of the support base. Each clamping component includes a first support frame fixedly installed on the upper side of the mounting base. A first electric push rod is fixedly installed on one side of the first support frame, and a clamping plate for positioning the corrugated pipe is fixedly connected to the output end of the first electric push rod.

[0015] By adopting the above technical solution, the first electric push rod is horizontally installed on the first support frame, and its output end is connected to the arc-shaped clamp. By controlling the extension and retraction of the first electric push rod, the two ends of the bellows are clamped.

[0016] Preferably, the adjustment assembly includes a mounting bracket fixedly installed on the top of two first support brackets, and a second support bracket fixedly installed on the top of each of the two mounting brackets. A threaded rod is rotatably connected between the two second support brackets, and a moving block is threadedly connected to the outer side of the threaded rod.

[0017] By adopting the above technical solution, two first support frames are fixedly mounted on top of each other, and two second support frames are provided on the mounting frames, with threaded rods installed between them.

[0018] Preferably, a second servo motor is fixedly installed on one side of the second support frame, and one end of the threaded rod is fixedly connected to the output end of the second servo motor.

[0019] By adopting the above technical solution, the second servo motor drives the threaded rod to rotate, thereby causing the moving block to move horizontally.

[0020] Preferably, the adjustment assembly further includes a second electric push rod, a third support frame is fixedly installed at the bottom of the moving block, the second electric push rod is fixedly installed on the upper side of the third support frame, the output end of the second electric push rod is fixedly connected to a fourth support frame, and the first servo motor is fixedly installed on one side of the fourth support frame.

[0021] By adopting the above technical solution, a third support frame is fixed below the moving block, and a second electric push rod is installed on its top. The output end of the second electric push rod is connected to a fourth support frame, and a first servo motor is fixed on the side of the fourth support frame to drive the cam to rotate.

[0022] Preferably, a protective cover is fixedly connected between the two second support frames, and the bottom of the protective cover is provided with a through groove adapted to the third support frame, and the third support frame is slidably connected to the through groove.

[0023] By adopting the above technical solution, the protective cover covers the threaded rod and the moving block to prevent dust from entering the threaded rod transmission components, and a through groove is opened at its bottom to allow the third support frame to slide.

[0024] A guide block is fixedly installed on one side of the fourth support frame, and a guide plate is fixedly installed on one side of the protective cover, with the guide block and the guide plate being slidably connected.

[0025] By adopting the above technical solution, the guide plate is fixed to the side of the protective cover and slides in cooperation with the guide block of the fourth support frame, ensuring the stability of the vertical movement of the cam, reducing mechanical vibration, and extending the service life of the device.

[0026] The pressure sensors are multiple and are evenly distributed at the bottom of the support base.

[0027] By adopting the above technical solution, the pressure sensor is embedded between the mounting base and the support base to monitor the data feedback when the bellows is under pressure in real time.

[0028] (III) Beneficial Effects

[0029] This application provides a pressure testing device for the bellows of a vacuum interrupter. It has the following beneficial effects:

[0030] 1. This vacuum interrupter bellows pressure resistance testing device uses a cam driven by a servo motor to rotate. Combined with the rolling contact of the outer roller shaft, the single-point impact force of the cam is converted into a uniformly distributed dynamic pressure, achieving high-precision pressure application and uniform force distribution, avoiding local overload of the bellows, and improving test accuracy.

[0031] 2. The pressure resistance testing device for the bellows in the vacuum interrupter uses a second servo motor to drive a threaded rod for horizontal movement of the adjustment component and a second electric push rod to control the vertical displacement of the cam, which can adapt to the testing requirements of bellows of different specifications. The rotating roller rotates freely with the deformation of the bellows while supporting it, reducing friction loss. The electric push rod of the clamping component drives the clamping plate to achieve quick clamping and release, improving testing efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0034] Figure 2 This is a three-dimensional structural diagram of the second embodiment of this application;

[0035] Figure 3 This is a partial three-dimensional structural schematic diagram of the adjustment component of this application;

[0036] Figure 4 This is a partial three-dimensional structural diagram of the adjustment component and cam component of this application;

[0037] Figure 5 This is a partial three-dimensional structural diagram of the cam assembly of this application;

[0038] Figure 6 This is a schematic diagram of a second partial three-dimensional structure of the cam assembly of this application.

[0039] In the diagram: 1. Mounting base; 2. Positioning mechanism; 21. Support assembly; 211. Support base; 212. Rotating roller; 213. Positioning plate; 214. Guide column; 22. Clamping assembly; 221. First support frame; 222. First electric push rod; 223. Clamping plate; 3. Detection mechanism; 31. Cam assembly; 311. Cam; 312. First servo motor; 313. Roller shaft; 314. Mounting groove; 315. Mounting head; 316. Bolt; 32. Adjustment assembly; 321. Mounting frame; 322. Second support frame; 323. Threaded rod; 324. Moving block; 325. Third support frame; 326. Second servo motor; 327. Second electric push rod; 328. Fourth support frame; 3281. Guide block; 329. Protective cover; 3291. Through groove; 3292. Guide plate; 4. Pressure sensor. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] Reference Figures 1 to 6 This application provides a pressure testing device for a bellows in a vacuum interrupter, including a mounting base 1. The mounting base 1 is a rectangular metal plate with mounting holes on its surface. A positioning mechanism 2, a testing mechanism 3, and a pressure sensor 4 are provided on the upper side of the mounting base 1. The positioning mechanism 2 includes a support component 21 and a clamping component 22. The testing mechanism 3 includes a cam component 31 and an adjustment component 32 for driving its movement. The cam component 31 includes a cam 311 and a first servo motor 312 for driving its rotation. Multiple evenly distributed rollers 313 are rotatably connected to the periphery of the cam 311. Multiple rollers 313 (1mm in diameter, made of bearing steel) are evenly embedded in the outer circumference of the cam 311. The rollers 313 can rotate freely around their own axis.

[0042] Reference Figure 2 , Figure 4 and Figure 5 In one aspect of this embodiment, a mounting groove 314 is fixedly mounted on the back of the cam 311, and a mounting head 315 adapted to the mounting groove 314 is fixedly connected to the output end of the first servo motor 312. A bolt 316 for fixing is threadedly connected to one side of the mounting groove 314. The cam 311 (with an involute profile) is inserted into the mounting head 315 of the first servo motor 312 through the mounting groove 314 and locked by the bolt 316 (M6 hexagon socket head cap screw), which can realize the replacement of the cam 311 model.

[0043] Reference Figure 1 and Figure 2 In one aspect of this embodiment, the support assembly 21 includes a support base 211. Rotating rollers 212 for supporting the corrugated pipe are fixedly installed on the inner walls of both sides of the support base 211. Positioning plates 213 are fixedly installed at the four corners of the support base 211. Four guide posts 214 that penetrate the positioning plates 213 are fixedly installed on the upper side of the mounting base 1. The positioning plates 213 and the guide posts 214 are slidably connected. The support base 211 is slidably connected to the guide posts 214 of the mounting base 1 through the positioning plates 213 at the four corners. During testing, it can be ensured that the support base 211 can press down on the pressure sensor 4. The rotating rollers 212 (made of nylon or rubber) are symmetrically installed on the inner walls of both sides of the support base 211. The spacing of the rotating rollers 212 is adapted to the diameter of the corrugated pipe to support the corrugated pipe and reduce friction.

[0044] There are two sets of clamping components 22, and the two sets of clamping components 22 are symmetrically arranged on both sides of the support base 211. The clamping components 22 include a first support frame 221 fixedly installed on the upper side of the mounting base 1. A first electric push rod 222 is fixedly installed on one side of the first support frame 221. The output end of the first electric push rod 222 is fixedly connected to a clamping plate 223 for positioning the corrugated pipe. One first support frame 221 is fixed on each side of the mounting base 1. The first electric push rod 222 (model JN-100, stroke 50mm) is horizontally installed on the first support frame 221. Its output end is connected to the arc-shaped clamping plate 223 (with a silicone pad attached to the inner wall). By controlling the extension and retraction of the first electric push rod 222, the two ends of the corrugated pipe are clamped.

[0045] Reference Figure 2 , Figure 3 and Figure 4 In one aspect of this embodiment, the adjustment assembly 32 includes a mounting bracket 321 fixedly mounted on the top of two first support brackets 221. Second support brackets 322 are fixedly mounted on the top of both sides of the mounting bracket 321. A threaded rod 323 is rotatably connected between the two second support brackets 322. A moving block 324 is threadedly connected to the outer side of the threaded rod 323. The mounting bracket 321 is fixedly mounted on the top of the two first support brackets 221. Two second support brackets 322 are provided on the mounting bracket 321, and a threaded rod 323 (lead 10mm) is installed between them.

[0046] A second servo motor 326 is fixedly installed on one side of a second support frame 322. One end of a threaded rod 323 is fixedly connected to the output end of the second servo motor 326. The second servo motor 326 (model 57HS09) drives the threaded rod 323 to rotate, thereby causing the moving block 324 to move horizontally.

[0047] The adjustment assembly 32 also includes a second electric push rod 327. A third support frame 325 is fixedly installed at the bottom of the moving block 324. The second electric push rod 327 is fixedly installed on the upper side of the third support frame 325. The output end of the second electric push rod 327 is fixedly connected to a fourth support frame 328. A first servo motor 312 is fixedly installed on one side of the fourth support frame 328. The third support frame 325 is fixed below the moving block 324, and the second electric push rod 327 (vertical stroke 10mm) is installed on its top. The output end of the second electric push rod 327 is connected to the fourth support frame 328. The first servo motor 312 (with reducer, output torque 10N·m) is fixed on the side of the fourth support frame 328 and is used to drive the cam 311 to rotate.

[0048] A protective cover 329 is fixedly connected between the two second support frames 322. The bottom of the protective cover 329 is provided with a through groove 3291 that is adapted to the third support frame 325. The third support frame 325 is slidably connected to the through groove 3291. The protective cover 329 covers the threaded rod 323 and the moving block 324 to prevent dust from entering the threaded rod transmission components. The through groove 3291 at its bottom allows the third support frame 325 to slide.

[0049] A guide block 3281 is fixedly installed on one side of the fourth support frame 328, and a guide plate 3292 is fixedly installed on one side of the protective cover 329. The guide block 3281 and the guide plate 3292 are slidably connected. The surface of the guide plate 3292 is provided with a sliding groove that matches the guide block 3281. The guide plate 3292 is fixed to the side of the protective cover 329 and slides with the guide block 3281 of the fourth support frame 328 to ensure the stability of the vertical movement of the cam 311, reduce mechanical vibration, and extend the service life of the device.

[0050] Reference Figure 1 and Figure 2 In one aspect of this embodiment, there are multiple pressure sensors 4, and the multiple pressure sensors 4 are evenly distributed at the bottom of the support 211. The pressure sensor 4 (model HX711, range 500N) is embedded between the mounting base 1 and the support 211 for real-time monitoring of data feedback when the bellows is under pressure.

[0051] All electrical devices in this plan are powered by an external power source.

[0052] Working principle: When using this vacuum interrupter bellows pressure resistance testing device, the clamping stage is as follows: The bellows is placed horizontally on the rotating roller 212 of the support base 211, and the first electric push rod 222 is activated to push the clamping plates 223 on both sides to clamp the two ends of the bellows; Adjustment and positioning stage: The second servo motor 326 drives the threaded rod 323, so that the moving block 324 drives the cam 311 to move horizontally above the position to be tested on the bellows; The second electric push rod 327 lowers the cam 311 to the preset height (2-5mm away from the surface of the bellows); Pressure testing stage: The first servo motor 312 drives the cam 311 to rotate at a speed of 10-30r / min, and the roller shaft 313 periodically contacts the surface of the bellows and applies pressure. The pressure sensor 4 collects the deformation data of the bellows in real time; Data analysis and feedback: When the pressure reaches the preset threshold (such as 80% of the yield strength of the bellows) or the deformation exceeds the limit, the system automatically stops the test and generates a pressure-deformation curve to determine whether the pressure resistance performance of the bellows is qualified.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure resistance testing device for a vacuum interrupter bellows, comprising a mounting base (1), characterized in that: The upper side of the mounting base (1) is provided with a positioning mechanism (2), a detection mechanism (3) and a pressure sensor (4). The positioning mechanism (2) includes a support component (21) and a clamping component (22). The detection mechanism (3) includes a cam component (31) and an adjustment component (32) for driving its movement. The cam component (31) includes a cam (311) and a first servo motor (312) for driving its rotation. Multiple evenly distributed rollers (313) are rotatably connected to the periphery of the cam (311). The back of the cam (311) is fixedly mounted with a mounting groove (314), and the output end of the first servo motor (312) is fixedly connected with a mounting head (315) that is compatible with the mounting groove (314). A bolt (316) for fixing is threadedly connected to one side of the mounting groove (314).

2. The pressure resistance testing device for a vacuum interrupter bellows according to claim 1, characterized in that: The supporting component (21) includes a support base (211), on which rotating rollers (212) for supporting the corrugated pipe are fixedly installed on the inner walls on both sides. Positioning plates (213) are fixedly installed at the four corners of the support base (211). Four guide posts (214) that penetrate the positioning plates (213) are fixedly installed on the upper side of the mounting base (1), and the positioning plates (213) and guide posts (214) are slidably connected.

3. The pressure resistance testing device for a vacuum interrupter bellows according to claim 2, characterized in that: The number of clamping components (22) is two sets, and the two sets of clamping components (22) are symmetrically arranged on both sides of the support base (211). The clamping component (22) includes a first support frame (221) fixedly installed on the upper side of the mounting base (1). A first electric push rod (222) is fixedly installed on one side of the first support frame (221). The output end of the first electric push rod (222) is fixedly connected to a clamping plate (223) for positioning the bellows.

4. The pressure resistance testing device for a vacuum interrupter bellows according to claim 3, characterized in that: The adjustment assembly (32) includes a mounting bracket (321) fixedly installed on the top of two first support brackets (221), and a second support bracket (322) fixedly installed on the top of both sides of the mounting bracket (321). A threaded rod (323) is rotatably connected between the two second support brackets (322), and a moving block (324) is threadedly connected to the outer side of the threaded rod (323).

5. The pressure resistance testing device for a vacuum interrupter bellows according to claim 4, characterized in that: A second servo motor (326) is fixedly mounted on one side of a second support frame (322), and one end of the threaded rod (323) is fixedly connected to the output end of the second servo motor (326).

6. The pressure resistance testing device for a vacuum interrupter bellows according to claim 4, characterized in that: The adjustment assembly (32) further includes a second electric push rod (327), a third support frame (325) is fixedly installed at the bottom of the moving block (324), the second electric push rod (327) is fixedly installed on the upper side of the third support frame (325), the output end of the second electric push rod (327) is fixedly connected to a fourth support frame (328), and the first servo motor (312) is fixedly installed on one side of the fourth support frame (328).

7. The pressure resistance testing device for a vacuum interrupter bellows according to claim 6, characterized in that: A protective cover (329) is fixedly connected between the two second support frames (322). The bottom of the protective cover (329) is provided with a through groove (3291) that is compatible with the third support frame (325), and the third support frame (325) is slidably connected to the through groove (3291).

8. The pressure resistance testing device for a vacuum interrupter bellows according to claim 7, characterized in that: A guide block (3281) is fixedly installed on one side of the fourth support frame (328), and a guide plate (3292) is fixedly installed on one side of the protective cover (329), and the guide block (3281) and the guide plate (3292) are slidably connected.

9. The pressure resistance testing device for a vacuum interrupter bellows according to claim 2, characterized in that: The number of pressure sensors (4) is multiple, and the multiple pressure sensors (4) are evenly distributed at the bottom of the support base (211).

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