Leakage detection system for hollow insulator

Abstract

The invention relates to a leak detection system for a hollow insulator, the leak detection system comprises an assembly unit for assembling a special seal head on two sides of the hollow insulator, a detection unit and a turnover unit, the special seal head comprises a seal head seat, the seal head seat is cylindrical, one side of the seal head seat is provided with an embedded section extending into a flange plate main body, and the embedded section is provided with a plurality of through holes; the outer wall of the embedded section is attached to the inner wall of the flange plate body, three locking seats corresponding to the flange connecting seats one to one are arranged on the other side of the end socket seat, locking rods extending in the direction of the embedded section are installed on the locking seats, and elastic locking blocks are arranged at the ends of the locking rods. According to the leak detection system, the assembling unit, the detection unit and the turnover unit are matched with one another, and the improved special sealing head is combined, so that the two sides of the hollow insulator can be automatically plugged, manual plugging is not needed, manual labor is greatly reduced, and airtightness leak detection of the hollow insulator is facilitated.

Description

Technical Field

[0001] The invention relates to the field of insulator testing, and in particular to a leakage detection system for hollow insulators. Background Art

[0002] Hollow insulators typically consist of an insulating tube, a sheath covering the tube, and flanges connected to the tube at both ends. Hollow insulators are used as support and electrical insulation components in power transmission and transformation equipment, such as power station busbar supports, disconnectors, smoothing reactors, and transmission line crossarms.

[0003] Currently, during the manufacturing process of hollow insulators, after the insulating tube, sheds, and flanges are secured, a helium leak test is required to ensure the tightness of the connection between the insulating tube and flange, as well as the tightness of the insulating tube itself. Traditional leak testing involves first sealing both sides of the hollow insulator with two sealing plates. The sealed hollow insulator is then placed in a helium leak tester for leaks under vacuum.

[0004] In the above leak detection process, first, when the sealing plate is used to seal the two sides of the hollow insulator, the sealing plate is fixed to the flanges on both sides of the hollow insulator through the cooperation of bolts and nuts. The sealing plate generally used is a flat plate structure, while the flange structure on both sides of the hollow insulator is as follows. Figure 1 As shown, it includes a hollow cylindrical flange body and three flange connection seats distributed in a herringbone shape, and flange connection holes are opened on the flange connection seats. When a flange of this structural form is matched with a sealing plate of a flat-plate structure, it is necessary to fix the sealing plate to the flange body, and cannot be directly fixed using the flange connection holes on the flange connection seat. Generally, the flange body does not have connection holes, which leads to the need to open connection holes for fixing with the sealing plate on the flange body in advance before conducting a leak test, and then manually use bolts and nuts to achieve fixation between the sealing plate and the flange body. The whole sealing process is very troublesome, and it is also necessary to open additional holes on the flange body, which is very troublesome. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a leak detection system for hollow insulators, which is convenient for performing air tightness leak detection on hollow insulators.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a leakage detection system for hollow insulators, the hollow insulator includes an insulating tube, an umbrella skirt covering the outside of the insulating tube and flanges connected to both ends of the insulating tube, the flange includes a hollow cylindrical flange body and three flange connection seats distributed in a herringbone shape, and flange connection holes are opened on the flange connection seat. The innovation of the present invention is that the leakage detection system includes An assembly unit is used to assemble a special head on both sides of the hollow insulator to achieve sealing on both sides of the hollow insulator. The special head includes a head seat, which is cylindrical and has an embedded section extending into the flange body on one side of the head seat, and the outer wall of the embedded section is in contact with the inner wall of the flange body. On the other side of the head seat are three locking seats corresponding to the flange connection seats. A locking rod extending in the direction of the embedded section is installed on the locking seat, and an elastic locking block is provided at the end of the locking rod; The assembly unit includes an assembly bracket, on which a pair of support rods are arranged in parallel and inclined, a material baffle is provided on the side of the support rod with a lower height, and a calibration component is also provided on the side of the support rod. A head feeding component and a head assembly component are also provided on both sides of the assembly bracket; a detection unit for performing a leak test on hollow insulators using helium in a vacuum environment, the detection unit comprising a vacuum box helium leak detection system, the vacuum box helium leak detection system comprising a vacuum box with a loading and unloading port on one side of the vacuum box and a material door provided at the loading and unloading port; A rotary unit is used to transport hollow insulators between the transfer unit and the detection unit, as well as to transport the hollow insulators after detection.

[0007] Furthermore, the locking rod and the elastic locking block cooperate as follows: two elastic locking blocks are provided on the same locking rod, and the two elastic locking blocks are respectively located on both sides of the locking rod; a groove for accommodating the elastic locking block is provided on a side of the locking rod away from the locking seat; the elastic locking block is installed in the groove by the cooperation of a return spring, and the elastic locking block is switched between the first position and the second position by the expansion and contraction of the return spring; In the first position, one side of the elastic locking block extends out of the locking rod, and the section of the elastic locking block extending out of the locking rod is in the shape of a right-angled trapezoid. The sections of the two elastic locking blocks extending out of the locking rod are symmetrically distributed with the center line of the locking rod as the symmetry line. In this position, the maximum distance of the sections of the two elastic locking blocks extending out of the locking rod is greater than the diameter of the flange connection hole, and the minimum distance of the sections of the two elastic locking blocks extending out of the locking rod is less than or equal to the diameter of the flange connection hole. In the second position, the elastic locking block is entirely placed in the groove of the locking rod.

[0008] Furthermore, the calibration assembly includes calibration roller groups respectively arranged on both sides of the assembly bracket, each calibration roller group is composed of a pair of calibration rollers distributed in parallel, and a gap is left between the two calibration rollers, and the size of the gap is smaller than the diameter of the flange body and larger than the radius of the flange body. One of the calibration rollers is driven to rotate by a calibration motor installed on the assembly bracket, and a calibration rod that cooperates with the flange connection seat is also provided on the assembly bracket next to the calibration roller; The head feeding assembly includes a head feeding bracket arranged beside the assembly bracket, and a head conveyor belt is arranged on the head feeding bracket; The head assembly assembly includes a head installation and removal assembly and a head pressing assembly; The head grabbing assembly includes a grabbing bracket arranged between the assembly bracket and the head feeding bracket, and a pneumatic clamping claw is arranged on the grabbing bracket and is located above the assembly bracket and the head feeding bracket. The pneumatic clamping claw is driven up and down by a lifting cylinder arranged on the grabbing bracket, so as to approach or move away from the head feeding bracket or the assembly bracket. The pneumatic clamping claw is also driven by a first electric push rod installed on the grabbing bracket to switch back and forth between the head feeding bracket and the assembly bracket, thereby realizing the movement of the special head on the head feeding bracket; The head clamping assembly includes a head clamping bracket arranged on the side of the head feeding bracket away from the assembly bracket. A clamping seat is provided on the head clamping bracket. The clamping seat is driven close to or away from the assembly bracket by a second electric push rod installed on the head clamping bracket. The clamping seat is cylindrical and has a pressure groove on one side of the head seat for the clamping seat to extend into.

[0009] Furthermore, a limit baffle is provided on the head feeding bracket, which is located above the head conveyor belt and is driven by a horizontal cylinder installed on the head clamping bracket to move above the head conveyor belt or move out from the head conveyor belt.

[0010] Furthermore, a material moving component is provided between the assembly bracket and the turnover unit, and the material moving component includes a material moving bracket, on which a pair of material moving claws are provided. The material moving claws are driven by a lifting cylinder to move up and down, thereby approaching or moving away from the support rod or the turnover unit or the calibration component, and the material moving claws are also driven by a third electric push rod to move back and forth between the support rod, the calibration component and the turnover unit, thereby realizing the movement of the hollow insulator between the support rod, the calibration component and the turnover unit.

[0011] Furthermore, the turnover unit includes a turnover bracket, a turnover table is installed on the turnover bracket, a pair of first guide rails are installed on the turnover bracket, and a pair of second guide rails are also provided in the vacuum box. The bottom end of the turnover table is installed with rollers used in conjunction with the first guide rails and the second guide rails. The turnover table is switched back and forth between the turnover bracket and the vacuum box by moving on the first guide rails and the second guide rails.

[0012] The advantages of the present invention are that the leakage detection system of the present invention, through the mutual cooperation between the assembly unit, the detection unit and the turnover unit, combined with the improved special head, can automatically seal both sides of the hollow insulator, eliminating the need for manual sealing, greatly reducing manual labor, and facilitating airtightness leakage detection of the hollow insulator.

[0013] The special head adopts a cylindrical head seat to cooperate with the flange, and uses the embedded section to extend into the flange body to achieve the sealing of the end of the hollow insulator. The locking rod and the elastic locking block are then used to cooperate with the flange connection seat to achieve relative fixation of the head seat and the hollow insulator. Based on this fixing method, it provides a good foundation for the subsequent realization of automated processing.

[0014] The design of the limit baffle on the head clamping bracket utilizes the horizontal movement of the limit baffle. On the basis of ensuring the smooth transportation of the special head, it can serve as a limit block for the subsequent special head during the sealing process of the previous special head, so as to prevent the subsequent special head from approaching the special head being sealed under the drive of the head conveyor belt, causing interference and affecting the smooth progress of the sealing.

[0015] The design of the material transfer component adopts the cooperation between the material transfer clamp, the lifting cylinder and the third electric push rod. The material transfer clamp is used to grab the hollow insulator and automatically transfer it between the support rod, the calibration component and the turnover unit. Manual handling and transfer are no longer required, which greatly reduces manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of an existing hollow insulator.

[0017] Figure 2 Schematic diagram of the leakage detection system for hollow insulators of the present invention.

[0018] Figure 3 It is a schematic diagram of the special head in the present invention.

[0019] Figure 4 Schematic diagram of the cooperation between the locking rod and the elastic locking block in the present invention.

[0020] Figure 5 It is a schematic diagram of the cooperation between the special head and the flange in the present invention.

[0021] Figure 6 Schematic diagram of the assembly bracket of the present invention.

[0022] Figure 7 This is a schematic diagram of the head grabbing assembly in the present invention. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0024] like Figure 1 A leak detection system for a hollow insulator is shown. The hollow insulator includes an insulating tube 1, an shed 11 covering the insulating tube 1, and flanges connected to both ends of the insulating tube 1. The flange includes a hollow cylindrical flange body 12 and three flange connection seats 13 distributed in a herringbone shape. Flange connection holes are opened on the flange connection seats 13.

[0025] like Figure 2-Figure 7 The leak detection system shown includes An assembly unit is used to assemble the special sealing heads on both sides of the hollow insulator to achieve sealing of both sides of the hollow insulator.

[0026] like Figure 3 As can be seen from the schematic diagram shown, the special head includes a head seat 2, which is cylindrical and has an embedded section 21 extending into the flange body 12 on one side of the head seat 2, and the outer wall of the embedded section 21 fits against the inner wall of the flange body 12, and the end of the head seat 2 is against the outer wall of the flange body 12, and three locking seats 22 corresponding to the flange connecting seats 13 are provided on the other side of the head seat 2, and a locking rod 23 extending in the direction of the embedded section 21 and passing through the flange connecting hole on the flange connecting seat 13 is installed on the locking seat 22, and an elastic locking block 24 is provided at the end of the locking rod 23. The special head adopts a cylindrical head seat 2 to cooperate with the flange, and uses the embedded section 21 to extend into the flange body 12 to achieve the sealing of the end of the hollow insulator. The locking rod 23 and the elastic locking block 24 are then used to cooperate with the flange connecting seat 13 to achieve relative fixation of the head seat 2 and the hollow insulator. Moreover, based on this fixing method, a good foundation is provided for the subsequent realization of automated processing.

[0027] like Figure 4 As can be seen from the schematic diagram shown, the cooperation between the locking rod 23 and the elastic locking block 24 is as follows: two elastic locking blocks 24 are provided on the same locking rod 23, and the two elastic locking blocks 24 are respectively located on both sides of the locking rod 23. A groove for accommodating the installation of the elastic locking block 24 is opened on the side of the locking rod 23 away from the locking seat 22. The elastic locking block 24 is installed in the groove through the cooperation of the reset spring 25, and the switching of the elastic locking block 24 between the first position and the second position is realized by the expansion and contraction of the reset spring 25.

[0028] In the first position, one side of the elastic locking block 24 extends out of the locking rod 23, and the section of the elastic locking block 24 extending out of the locking rod 23 is in the shape of a right-angled trapezoid. The sections of the two elastic locking blocks 24 extending out of the locking rod are symmetrically distributed with the center line of the locking rod 23 as the symmetry line. In this position, the maximum distance of the two elastic locking blocks 24 extending out of the locking rod 23 is greater than the diameter of the flange connection hole, and the minimum distance of the two elastic locking blocks 24 extending out of the locking rod 23 is less than or equal to the diameter of the flange connection hole.

[0029] In the second position, the elastic locking block 24 is entirely placed in the groove of the locking rod 23 .

[0030] By designing a section of the elastic locking block 24 extending outside the locking rod 23 into a right-angled trapezoidal shape, when the locking rod 23 passes through the flange connection hole on the flange connection seat 13, the oblique side of the elastic locking block 24 is used for guidance, so that the elastic locking block 24 can pass through the flange connection hole smoothly, and when passing through the flange connection hole, the return spring 25 will be squeezed, causing the elastic locking block 24 to move to the second position. When the elastic locking block 24 completely passes through the flange connection hole, the elastic locking block 24 is moved from the second position to the first position again under the action of the return spring 25, and the right-angled side of the elastic locking block 24 is used for limiting, thereby realizing one-way limit fixation of the elastic locking block 24 and the flange connection seat.

[0031] The assembly unit includes an assembly bracket 3, which is a hollow rectangular parallelepiped structure. The horizontal direction where the long axis of the assembly bracket 3 is located is defined as a first direction, and another horizontal direction perpendicular to the first direction is defined as a second direction.

[0032] A pair of support rods 31 distributed in parallel along the second direction are provided on the assembly bracket 3, and the support rods 31 extend along the first direction, and the support rods 31 are inclined, and the inclination direction is gradually downward from the feed side of the support rod 31 to the discharge side of the support rod 31. With this inclination setting on the support rod 31, the hollow insulator placed on the support rod 31 can roll from the feed side of the support rod 31 to the discharge side of the support rod 31 under the action of gravity. A vertically arranged material baffle 32 is also provided at the discharge side of the support rod 31. Through the design of the material baffle 32, the hollow insulator placed on the support rod 31 is blocked and limited, thereby preventing the hollow insulator from directly rolling out of the support rod 31 from the discharge side of the support rod 31.

[0033] A calibration assembly is also provided on the discharge side of the support rod 31, and the calibration assembly includes calibration roller groups respectively provided on both sides of the assembly bracket 3 along the second direction, and each calibration roller group is composed of a pair of calibration rollers 33 distributed in parallel along the first direction, and a gap is left between the two calibration rollers 33, and the size of the gap is smaller than the diameter of the flange body 12 and larger than the radius of the flange body 12. By controlling this gap, when the hollow insulator is placed on the calibration roller 33, the two calibration rollers 33 can stably support the hollow insulator to avoid the shaking of the hollow insulator, and one of the calibration rollers 33 is mounted on the assembly bracket 3. The quasi-motor drives the rotation to drive the hollow insulator to rotate. A calibration rod 34 that cooperates with the flange connection seat 13 is also provided on the assembly bracket 3 next to the calibration roller 33. The position of the rotating hollow insulator is calibrated by setting it on the calibration rod 34. When one of the flange connection seats 13 of the hollow insulator touches the calibration rod 34, the calibration rod 34 is used to block the flange connection seat 13. Even if the calibration roller 33 continues to rotate, the hollow insulator will be restricted due to the existence of the calibration rod 34 to prevent it from continuing to rotate, thereby realizing the calibration of the position of the hollow insulator, which provides a basis for the subsequent automatic assembly of the special head.

[0034] A head feeding assembly and a head assembly assembly are respectively provided on both sides of the assembly bracket 3 , and the two head feeding assemblies are respectively distributed on both sides of the assembly bracket 3 along the second direction.

[0035] The head feeding assembly includes a head feeding bracket 4 arranged next to the assembly bracket 3, and a head conveyor belt 41 is arranged on the head feeding bracket 4, and the head conveyor belt 41 is driven by a motor installed on the head feeding bracket 4 to rotate, thereby realizing the transportation of special heads, and the conveying direction of the head conveyor belt 41 is parallel to the first direction.

[0036] The head assembly assembly includes a head installation and removal assembly and a head pressing assembly.

[0037] like Figure 7 As can be seen from the schematic diagram shown, the head grabbing assembly includes a grabbing bracket 401 arranged between the assembly bracket 3 and the head feeding bracket 4, and a pneumatic clamp 402 is arranged on the grabbing bracket 401 and located above the assembly bracket 3 and the head feeding bracket 4. The pneumatic clamp 402 is driven up and down by a lifting cylinder 403 arranged on the grabbing bracket 401, so as to approach or move away from the head feeding bracket 4 or the assembly bracket 3. The pneumatic clamp 402 is also driven by a first electric push rod 404 installed on the grabbing bracket 401 to switch back and forth between the head feeding bracket 4 and the assembly bracket 3, thereby realizing the movement of the special head on the head feeding bracket 4.

[0038] Specifically, a driving guide rail 405 extending along the second direction is installed on the grabbing bracket 401, and the top end of the lifting cylinder 403 is installed on a transition plate. The bottom end of the lifting cylinder 403 is directly connected to the pneumatic clamp 402, and drives the pneumatic clamp 402 to move up and down, so that the pneumatic clamp 402 is close to or away from the head feeding bracket 4 or the assembly bracket 3. A horizontal slider 406 that cooperates with the driving guide rail 405 is installed on the transition plate. The transition plate is pulled by the first electric push rod 404 to move back and forth along the driving guide rail 405, thereby driving the lifting cylinder 403 and the pneumatic clamp 402 to move horizontally synchronously, thereby moving back and forth between the assembly bracket 3 and the head feeding bracket 4, so that the pneumatic clamp 402 grabs the special head on the head conveyor belt 41 and moves to the hollow insulator at the calibration component.

[0039] The head clamping assembly includes a head clamping bracket 411 arranged on the side of the head feeding bracket 4 away from the assembly bracket 3, and a clamping seat 412 is provided on the head clamping bracket 411. The clamping seat 412 is driven close to or away from the assembly bracket 3 by a second electric push rod 413 installed on the head clamping bracket 411. The clamping seat 412 is cylindrical, and a pressure groove 25 is opened on one side of the head seat 2 for the clamping seat 412 to extend into.

[0040] A limit baffle 414 is also provided on the head pressing bracket 411. The limit baffle 414 is located above the head conveyor belt 41 and is driven by a horizontal cylinder 415 installed on the head pressing bracket 411 to move above the head conveyor belt 41 or move away from the head conveyor belt 41. The design of the limit baffle 414 on the head pressing bracket 411 utilizes the horizontal movement of the limit baffle 414 to ensure the smooth transportation of the special head. On the basis of this, it can serve as a limit block for the subsequent special head during the plugging process of the previous special head, so as to prevent the subsequent special head from approaching the special head being plugged under the drive of the head conveyor belt 41, causing interference and affecting the smooth plugging process.

[0041] A detection unit is used to perform a leak test on hollow insulators using helium in a vacuum environment. The detection unit includes a vacuum box helium leak detection system. The vacuum box helium leak detection system includes a vacuum box 5. A loading and unloading port is defined on one side of the vacuum box 5, and a loading and unloading port is also provided at the loading and unloading port. The vacuum box helium leak detection system in this embodiment can directly adopt the vacuum box helium leak detection system of Anhui Bowei Optoelectronics Technology Co., Ltd., and its specific structure and operating principle are not described in detail in this embodiment.

[0042] A turnover unit is used to realize the transportation of hollow insulators between the transfer unit and the detection unit and the unloading transportation after detection. The turnover unit includes a turnover bracket 6, which is arranged on one side of the assembly bracket 3 in the first direction, and the turnover bracket 6 and the vacuum box 5 are distributed in parallel along the second direction. A turnover table 61 is installed on the turnover bracket 6, and a pair of support seats 62 distributed in parallel along the second direction are also installed on the upper end surface of the turnover table 61. The support of the hollow insulator is realized by the cooperation of the two support seats 62. A pair of first guide rails 63 distributed in parallel along the first direction are installed on the turnover bracket 6, and the first guide rails 63 are distributed along the second direction. The vacuum box 5 extends in two directions, and a pair of second guide rails distributed in parallel along the first direction are also provided in the vacuum box 5. The second guide rails also extend along the second direction, and the two second guide rails are aligned one by one with the two first guide rails 63 respectively. Rollers used in conjunction with the first guide rails 63 and the second guide rails are installed at the bottom end of the turnover table 61. At the same time, guide grooves for the rollers to be placed and rolled are opened on the first guide rails 63 and the second guide rails, so that the turnover table 61 can move back and forth smoothly between the first guide rails 63 and the second guide rails. The turnover table 61 can be switched back and forth between the turnover bracket 6 and the vacuum box 5 by moving the turnover table on the first guide rail and the second guide rail.

[0043] A material moving assembly is also provided between the assembly bracket 3 and the turnover unit. The material moving assembly includes a material moving bracket. A pair of material moving clamps distributed in parallel along the second direction are provided on the material moving bracket. The two material moving clamps are mounted on a material moving plate, and the material moving plate is driven up and down by a lifting cylinder, thereby driving the two moving clamps to synchronously approach or move away from the support rod or the turnover unit or the calibration assembly. The material moving clamps are also driven by a third electric push rod to move back and forth between the support rod, the calibration assembly and the turnover unit, thereby realizing the movement of the hollow insulator between the support rod, the calibration assembly and the turnover unit. The specific structure of the material moving assembly is the same as that of the head grabbing assembly and will not be described in detail in this embodiment. The design of the material moving assembly adopts the cooperation between the material moving clamps, the lifting cylinder and the third electric push rod, and utilizes the material moving clamps to grab the hollow insulators for automatic turnover between the support rod, the calibration assembly and the turnover unit, eliminating the need for manual handling and transfer, thereby greatly reducing manual labor.

[0044] Working principle: When performing leak detection on hollow insulators, first, place the hollow insulator to be tested on the feed side of the support rod 31. Under the action of its own weight, the hollow insulator rolls from the feed side of the support rod 31 to the discharge side until it stops at the material baffle 32. Then, the material transfer clamp is actuated to grab the hollow insulator located at the material baffle 32 and place it on the calibration roller 33. Then, the calibration roller 33 rotates, driving the hollow insulator to rotate, thereby calibrating and adjusting the position of the hollow insulator and waiting for the special head to be sealed.

[0045] The special head is conveyed by the head conveyor belt 41, and the conveyance stops when the first special head is conveyed to the pressing seat 412. At the same time, the limit baffle 414 moves to the top of the head conveyor belt 41 under the push of the horizontal cylinder 415, blocking the special head conveyed subsequently by the head conveyor belt 41 to ensure that there is only one special head at the pressing seat 412. Then, the pneumatic clamp 402 is actuated to grab the special head on the head conveyor belt 41 and drive the special head to move to the hollow insulator on the calibration roller 33. And align the embedded section 21 of the special head with the flange body 12, and extend the embedded section 21 into the flange body 12 to complete the preliminary fixation of the special head and the flange body 12. Then, the pneumatic clamp 402 is loosened, and the second electric push rod 413 drives the pressing seat 412 to move toward the assembly bracket, and pushes the special head to continue to move into the flange body 12, so that the embedded section 21 extends into the inner wall of the flange body 12, and the elastic locking block 24 passes through the flange connection hole of the flange connection seat 13 to form a flange connection. Figure 5 In the state shown, the sealing and fixing of the hollow insulator is completed.

[0046] After being sealed, the hollow insulator is moved by the material transfer clamp to grab the hollow insulator on the calibration roller 33 and place it on the two support seats 62 on the turnover table 61. The turnover table 61 is then pushed manually to push the turnover table 61 into the vacuum box 5, close the material door of the vacuum box 5, and start the air tightness test of the hollow insulator.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A leak detection system for a hollow insulator, comprising an insulating tube, a sheath covering the insulating tube, and flanges connected to both ends of the insulating tube. The flanges comprise a hollow cylindrical flange body and three flange connection seats arranged in a herringbone pattern, each having flange connection holes formed therein. The system is characterized by: Leak detection system includes An assembly unit is used to assemble a special head on both sides of the hollow insulator to achieve sealing on both sides of the hollow insulator. The special head includes a head seat, which is cylindrical and has an embedded section extending into the flange body on one side of the head seat, and the outer wall of the embedded section is in contact with the inner wall of the flange body. On the other side of the head seat are three locking seats corresponding to the flange connection seats. A locking rod extending in the direction of the embedded section is installed on the locking seat, and an elastic locking block is provided at the end of the locking rod; The assembly unit includes an assembly bracket, on which a pair of support rods are arranged in parallel and inclined, a material baffle is provided on the side of the support rod with a lower height, and a calibration component is also provided on the side of the support rod. A head feeding component and a head assembly component are also provided on both sides of the assembly bracket; a detection unit for performing a leak test on hollow insulators using helium in a vacuum environment, the detection unit comprising a vacuum box helium leak detection system, the vacuum box helium leak detection system comprising a vacuum box with a loading and unloading port on one side of the vacuum box and a material door provided at the loading and unloading port; A rotary unit is used to transport hollow insulators between the transfer unit and the detection unit, as well as to transport the hollow insulators after detection.

2. The hollow insulator leakage detection system according to claim 1, characterized in that: The locking rod and the elastic locking block cooperate as follows: two elastic locking blocks are provided on the same locking rod, and the two elastic locking blocks are respectively located on both sides of the locking rod; a groove for accommodating the elastic locking block is formed on a side of the locking rod away from the locking seat; the elastic locking block is installed in the groove by the cooperation of a return spring, and the elastic locking block is switched between the first position and the second position by the expansion and contraction of the return spring; In the first position, one side of the elastic locking block extends out of the locking rod, and the section of the elastic locking block extending out of the locking rod is in the shape of a right-angled trapezoid. The sections of the two elastic locking blocks extending out of the locking rod are symmetrically distributed with the center line of the locking rod as the symmetry line. In this position, the maximum distance of the sections of the two elastic locking blocks extending out of the locking rod is greater than the diameter of the flange connection hole, and the minimum distance of the sections of the two elastic locking blocks extending out of the locking rod is less than or equal to the diameter of the flange connection hole. In the second position, the elastic locking block is entirely placed in the groove of the locking rod.

3. The hollow insulator leakage detection system according to claim 1, characterized in that: The calibration assembly includes calibration roller groups respectively arranged on both sides of the assembly bracket, each calibration roller group is composed of a pair of calibration rollers distributed in parallel, and a gap is left between the two calibration rollers, and the size of the gap is smaller than the diameter of the flange body and larger than the radius of the flange body. One of the calibration rollers is driven to rotate by a calibration motor installed on the assembly bracket, and a calibration rod that cooperates with the flange connection seat is also provided on the assembly bracket next to the calibration roller; The head feeding assembly includes a head feeding bracket arranged beside the assembly bracket, and a head conveyor belt is arranged on the head feeding bracket; The head assembly assembly includes a head installation and removal assembly and a head pressing assembly; The head grabbing assembly includes a grabbing bracket arranged between the assembly bracket and the head feeding bracket, and a pneumatic clamping claw is arranged on the grabbing bracket and is located above the assembly bracket and the head feeding bracket. The pneumatic clamping claw is driven up and down by a lifting cylinder arranged on the grabbing bracket, so as to approach or move away from the head feeding bracket or the assembly bracket. The pneumatic clamping claw is also driven by a first electric push rod installed on the grabbing bracket to switch back and forth between the head feeding bracket and the assembly bracket, thereby realizing the movement of the special head on the head feeding bracket; The head clamping assembly includes a head clamping bracket arranged on the side of the head feeding bracket away from the assembly bracket. A clamping seat is provided on the head clamping bracket. The clamping seat is driven close to or away from the assembly bracket by a second electric push rod installed on the head clamping bracket. The clamping seat is cylindrical and has a pressure groove on one side of the head seat for the clamping seat to extend into.

4. The hollow insulator leakage detection system according to claim 3, characterized in that: The head feeding bracket is also provided with a limit baffle, which is located above the head conveyor belt and is driven by a horizontal cylinder installed on the head pressing bracket to move above the head conveyor belt or move out from the head conveyor belt.

5. The hollow insulator leakage detection system according to claim 1, characterized in that: A material moving assembly is also provided between the assembly bracket and the turnover unit, and the material moving assembly includes a material moving bracket, on which a pair of material moving claws are provided. The material moving claws are driven up and down by a lifting cylinder to move closer to or away from the support rod or the turnover unit or the calibration assembly, and the material moving claws are also driven by a third electric push rod to move back and forth between the support rod, the calibration assembly and the turnover unit, thereby realizing the movement of the hollow insulator between the support rod, the calibration assembly and the turnover unit.

6. The hollow insulator leakage detection system according to claim 1, characterized in that: The turnover unit includes a turnover bracket, a turnover table is installed on the turnover bracket, a pair of first guide rails are installed on the turnover bracket, and a pair of second guide rails are also provided in the vacuum box. The bottom end of the turnover table is installed with rollers used in conjunction with the first guide rails and the second guide rails. The turnover table is switched back and forth between the turnover bracket and the vacuum box by moving on the first guide rails and the second guide rails.

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