200kV alternating current and direct current electromechanical combined testing machine

Abstract

The utility model belongs to the field of testing machines, and relates to insulator testing, in particular to a 200kV alternating current and direct current electromechanical combined testing machine which comprises a testing host, a hydraulic system and a control system, the testing host comprises a base, an oil cylinder base, four stand columns and a locking nut, a hydraulic oil cylinder is arranged on the oil cylinder base, and the telescopic end of the hydraulic oil cylinder faces downwards; a pull arm assembly is arranged at the telescopic end of the hydraulic oil cylinder and comprises a diagonal guide plate, an insulating tile, a pipe sleeve, a plate sleeve and an insulating bush, a high-strength screw connected with a piston rod of the hydraulic oil cylinder from bottom to top is arranged in the center of the insulating bush, a connecting seat is arranged at the bottom of the plate sleeve, and a connecting hole is formed in the center of the connecting seat. Insulator connectors are arranged in the connecting holes, insulating shaft sleeves are arranged on the connecting faces of the stand columns and the oil cylinder base, and four isolation rings corresponding to the locking nuts in a one-to-one mode are arranged on the oil cylinder base. The device is reasonable in design, simple in structure, good in insulativity, beneficial to the actual service life of equipment and suitable for large-scale popularization.

Description

Technical Field

[0001] This utility model belongs to the field of testing machines, and relates to insulator testing, and more particularly to a 200kV AC / DC electromechanical combined testing machine. Background Technology

[0002] Insulators, serving as both electrical insulation and mechanical load-bearing components between conductors and grounding, are indispensable and crucial parts in power transmission and transformation lines. Currently, insulators include disc suspension insulators and line post insulators, with disc suspension insulators holding a significant market share in power transmission and transformation lines. To verify the electromechanical load performance of disc suspension insulators, corresponding electromechanical destructive load tests are necessary.

[0003] Existing patent CN202210927590.7 discloses an automatic control electromechanical failure load testing device and method for insulators. By incorporating sensors within the device, it provides electrical shielding, effectively protecting the control module from the instantaneous overcurrent impact during test sample breakdown and ensuring normal operation. Regarding the controller, the measurement system automatically collects and records data, automatically determining the sample failure status based on the relationship between voltage, mechanical load, and displacement. It can statistically analyze test data and quickly and automatically generate corresponding report templates based on the number of samples and the failure status. The insulating connectors in this device utilize a high-strength composite insulator structure, capable of withstanding high mechanical impacts and boasting a long service life, reducing replacement and maintenance costs. However, for testing insulator performance in energized environments, the insulation performance of this device needs improvement, particularly in the column section. Secondly, the lever arm acting on the insulator under test is relatively long; at the moment of insulator failure, the stability of the lever arm is severely tested, requiring reasonable safety measures to extend the actual service life of the structure and components constituting the lever arm. Utility Model Content

[0004] This invention addresses the technical problems existing in the aforementioned testing devices by proposing a 200kV AC / DC electromechanical combined testing machine that is rationally designed, simple in structure, has good insulation, and is conducive to extending the actual service life of local parts.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a 200kV AC / DC electromechanical combined testing machine, including a testing host, a hydraulic system, and a control system. The testing host includes a base and a cylinder seat. Four columns are arranged between the base and the cylinder seat. Locking nuts are provided on the top of each column. A hydraulic cylinder is mounted on the cylinder seat with its extension end facing downwards. A pull arm assembly is provided at the extension end of the hydraulic cylinder. The pull arm assembly includes horizontal diagonal guide plates. Insulating tiles that slide with the columns are provided at both ends of the diagonal guide plates. The diagonal guide plate has a through hole at its center, a sleeve above the through hole, and a plate sleeve below the through hole. The plate sleeve has a stepped hole at its center that mates with the through hole, and an insulating bushing is installed in the stepped hole. A high-strength screw connecting the piston rod of the hydraulic cylinder from bottom to top is installed at the center of the insulating bushing. A connecting seat is installed at the bottom of the plate sleeve, and a connecting hole is installed at the center of the connecting seat. An insulator connector is installed in the connecting hole. An insulating bushing is installed on the connecting surface between the column and the cylinder seat. Four isolation rings corresponding to the locking nuts are installed on the cylinder seat.

[0006] Preferably, the base is provided with four connecting hooks, the test host, hydraulic system and control system are set on the operating platform, the operating platform is provided with four positioning wells, and the positioning wells are provided with safety piles connected to the connecting hooks. The safety piles are provided with a grounding grid that is safely connected to them in the direction away from the test host.

[0007] Preferably, each end of the sleeve is provided with a pair of clamps, which are used to hold the insulating tile, and the clamps are connected to the sleeve by screws.

[0008] Preferably, the test host includes an isolation fence disposed on the outside of the column.

[0009] Preferably, the area of ​​the plate sleeve is larger than the area of ​​the connecting seat, and the bottom surface of the plate sleeve is provided with multiple sets of screw holes, with each set of screw holes having a different center distance from the stepped hole.

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

[0011] 1. This utility model provides a 200kV AC / DC electromechanical combined testing machine. The pull arm assembly, as the connecting part between the hydraulic cylinder and the insulator, can transfer part of the force to the column as the hydraulic cylinder extends and retracts. This helps reduce the impact of the insulator bursting on the hydraulic cylinder and extends the actual service life of the equipment. Simultaneously, insulation designs such as insulating tiles and insulating bushings are used at multiple nodes to improve insulation performance. Furthermore, the design of insulating bushings and insulating rings on the column further enhances the safety of the equipment during testing. This device has a reasonable design, simple structure, good insulation, and is conducive to the actual service life of the equipment, making it suitable for large-scale promotion. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 An isometric drawing of a 200kV AC / DC electromechanical combined testing machine provided for an embodiment;

[0014] Figure 2 A front view of a 200kV AC / DC electromechanical combined testing machine provided for an embodiment;

[0015] Figure 3 An isometric view of the test host provided for the embodiment;

[0016] Figure 4 A cross-sectional view of the test host provided for the embodiment;

[0017] Figure 5 A front view of the hydraulic cylinder and lever assembly provided in the embodiment;

[0018] Figure 6 An isometric view of the hydraulic cylinder and pull arm assembly provided for an embodiment;

[0019] In the above figures, 1. Test host; 11. Base; 12. Cylinder seat; 13. Column; 14. Locking nut; 15. Connecting hook; 16. Isolation fence; 2. Control system; 3. Hydraulic cylinder; 4. Pull arm assembly; 41. Diagonal guide plate; 42. Insulating tile; 43. Pipe sleeve; 44. Plate sleeve; 45. Insulating bushing; 46. High-strength screw; 47. Connecting seat; 48. Connecting hole; 49. Insulator connector; 410. Clamping plate; 411. Screw hole; 5. Insulating bushing; 6. Isolating ring; 7. Operating platform; 8. Positioning well. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Examples, such as Figure 1 As shown in Figure 6, this utility model provides a 200kV AC / DC electromechanical combined testing machine, including a testing host 1, a hydraulic system, and a control system 2. The testing host 1 includes a base 11 and a cylinder seat 12. Four columns 13 are arranged between the base 11 and the cylinder seat 12. Locking nuts 14 are provided on the top of the columns 13. Hydraulic cylinders 3 are arranged on the cylinder seat 12 with their extension and retraction ends facing downwards. A pull arm assembly 4 is provided at the extension and retraction ends of the hydraulic cylinders 3. The pull arm assembly 4 includes a horizontal diagonal guide plate 41. Insulating tiles 42 that slide with the columns 13 are provided at both ends of the diagonal guide plate 41. A through hole is provided in the center of the diagonal guide plate 41. A tube sleeve 43 is provided at the top, and a plate sleeve 44 is provided below the through hole. A stepped hole that mates with the through hole is provided in the center of the plate sleeve 44. An insulating bushing 45 is provided in the stepped hole. The insulating bushing 45 extends upward and blocks the inner wall of the tube sleeve and the plate sleeve. A high-strength screw 46 that connects the piston rod of the hydraulic cylinder 3 from bottom to top is provided in the center of the insulating bushing 45. A connecting seat 47 is provided at the bottom of the plate sleeve 44. A connecting hole 48 is provided in the center of the connecting seat 47. An insulator connector 49 is provided in the connecting hole 48. An insulating bushing 5 is provided on the connecting surface between the column 13 and the cylinder seat 12. Four isolation rings 6 that correspond one-to-one with the locking nut 14 are provided on the cylinder seat 12.

[0023] Specifically, the hydraulic cylinder 3 provides tension to the insulator through the servo control system 2. The pull arm assembly 4, as the connecting part between the hydraulic cylinder 3 and the insulator, can transfer part of the force to the column 13 as the hydraulic cylinder 3 extends and retracts, which can improve the stability of the test action, especially reducing the impact of the insulator on the hydraulic cylinder 3 at the moment of bursting, and is conducive to extending the actual service life of the equipment. At the same time, under the requirements of the live testing environment, this utility model adopts insulation design at multiple nodes to improve insulation performance, such as insulating tiles 42 and insulating bushings 45. The current is blocked by the insulating tiles 42 and insulating bushings 45 on the upward transmission path, and the current will not flow through the hydraulic cylinder 3. In addition, this utility model also designs insulating bushings 5 ​​and insulating rings 6 on the column 13, which can further block the current from passing through the column 13 and the current from being connected in series at the top of the column 13, thereby effectively improving the safety of the equipment during the test. The load sensor is set at the top of the test host. Due to the good grounding of the outer shell, the interference of high voltage ionization on the analog acquisition signal is greatly reduced. While effectively improving the coaxiality of tensile load, it also ensures the consistency between load test data and verification data under energized conditions.

[0024] Furthermore, this invention features four connecting hooks 15 on the base 11. The test host 1, hydraulic system, and control system 2 are mounted on the operating platform 7. The operating platform 7 has four positioning wells 8, each containing a safety stake (not shown in the figure) connected to the connecting hooks 15. Each safety stake has a grounding grid safely connected to it in the direction away from the test host 1. The safety stakes in the positioning wells 8 can be hooked to the connecting hooks 15. The operating platform 7 provides effective coverage and insulation for the grounding grid. The current, at its downward transmission end, connects to the ground through the grounding grid, thereby improving the insulation safety of the equipment during operation.

[0025] To improve the stability of the insulating tile 42, this invention provides a pair of clamping plates at both ends of the sleeve 44. The clamping plates are used to hold the insulating tile 42, and are connected to the sleeve 44 by screws. Under the clamping action of the clamping plates, the insulating tile 42 is fixed to the end face of the sleeve 44, allowing the sleeve 44 to move along the column 13 through diagonal support. Moreover, the insulating tile 42 can maintain a high degree of integrity, thereby ensuring its good insulation performance.

[0026] To improve the safety of the test operation, considering that the insulator will produce irregular burst fragments when it is pulled apart, the test host 1 provided by this utility model includes an isolation fence 16 set on the outside of the column 13. The isolation fence 16 is set to prevent fragments from flying around the test chamber.

[0027] To improve the utilization rate of this equipment, considering that different insulators require insulator connectors 49 with different shapes and designs for their connection ends, the plate sleeve 44 provided by this invention can be flexibly matched with different connecting seats 47. Specifically, the area of ​​the plate sleeve 44 is larger than the area of ​​the connecting seat 47, and the bottom surface of the plate sleeve 44 is provided with multiple sets of screw holes, each set of screw holes having a different center distance from the stepped hole. The connecting seats 47 matched with different insulator connectors 49 will have corresponding specifications. The screw holes on the connecting seats 47 can correspond to the screw holes on the plate sleeve 44, and by screwing screws into the screw holes at different positions, a reliable connection relationship can be established between the plate sleeve 44 and the connecting seat 47, thereby improving the overall utilization rate of this equipment.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A 200kV AC / DC electromechanical combined testing machine, comprising a testing host, a hydraulic system, and a control system, wherein the testing host includes a base and a cylinder seat, four columns are arranged between the base and the cylinder seat, a locking nut is provided on the top of each column, and a hydraulic cylinder is arranged on the cylinder seat with its extension end facing downwards, characterized in that, The telescopic end of the hydraulic cylinder is equipped with a pull arm assembly, which includes a horizontal diagonal guide plate. Insulating tiles that slide with the column are located at both ends of the diagonal guide plate. A through hole is located at the center of the diagonal guide plate. A sleeve is located above the through hole, and a plate sleeve is located below the through hole. A stepped hole that mates with the through hole is located at the center of the plate sleeve. An insulating bushing is located in the stepped hole. A high-strength screw connecting the piston rod of the hydraulic cylinder from bottom to top is located at the center of the insulating bushing. A connecting seat is located at the bottom of the plate sleeve. A connecting hole is located at the center of the connecting seat, and an insulator connector is located in the connecting hole. An insulating bushing is located on the connecting surface between the column and the cylinder seat. Four isolation rings corresponding to the locking nuts are located on the cylinder seat.

2. The 200kV AC / DC electromechanical combined testing machine according to claim 1, characterized in that, The base is provided with four connecting hooks. The test host, hydraulic system and control system are set on the operating platform. The operating platform is provided with four positioning wells. The positioning wells are provided with safety stakes that are connected to the connecting hooks. The safety stakes are provided with a grounding grid that is safely connected to them in the direction away from the test host.

3. A 200kV AC / DC electromechanical combined testing machine according to claim 2, characterized in that, Both ends of the plate sleeve are provided with a pair of clamps, which are used to hold the insulating tile. The clamps are connected to the plate sleeve by screws.

4. A 200kV AC / DC electromechanical combined testing machine according to claim 3, characterized in that, The test host includes an isolation fence installed on the outside of the column.

5. A 200kV AC / DC electromechanical combined testing machine according to claim 1, characterized in that, The area of ​​the plate sleeve is larger than the area of ​​the connecting seat. The bottom surface of the plate sleeve is provided with multiple sets of screw holes, and the center distance from each set of screw holes to the stepped hole is different.

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