High-voltage insulator coaxiality detection tool for GIS

Abstract

The utility model discloses a high-voltage insulator coaxiality detection tool for a GIS, which comprises a top plate and a substrate which are arranged in parallel, the upper part of the top plate is fixedly provided with a handle, the lower part of the top plate is symmetrically and fixedly provided with two guide sleeves, the upper part of the substrate is fixedly provided with guide columns at positions corresponding to the two guide sleeves respectively, and the guide columns are fixedly arranged on the upper part of the substrate. The two guide columns are matched with the lower portions of the corresponding guide sleeves in a sliding and inserted mode. The middle parts of the top plate and the base plate are respectively provided with an assembling hole I and an assembling hole II which have the same specification and are used for installing a detection tool, and the axes of the assembling hole I and the assembling hole II are combined. According to the utility model, the rapid detection of the coaxiality of the insulation torsion bar and the insulation cylinder can be completed by cooperating with a corresponding detection tool, so that the coaxiality detection process of the high-voltage insulator is more rapid and accurate, and the qualified rate of products can be improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage insulator finished product testing technology, and in particular to a coaxiality testing tool for high-voltage insulators used in GIS. Background Technology

[0002] With the rapid development of ultra-high voltage AC transmission and transformation projects, GIS equipment, as a key component of the power system, is of paramount importance in terms of reliability and stability. High-voltage insulators, as one of the core components of GIS equipment, undertake important functions such as isolating different parts of the electrical circuit, insulating and supporting conductors. The performance and condition of the insulators directly affect the safe operation of the GIS equipment and even the entire power grid. A fault in the insulator could lead to serious consequences such as large-scale power outages, causing enormous economic losses and social impact.

[0003] Currently, existing insulator testing methods have some limitations. For example, they only test raw materials and semi-finished products during insulator production, neglecting comprehensive testing of the finished insulator's performance, leading to the failure to detect some potential defects in a timely manner. Furthermore, current testing methods require damaging the insulator structure to test its coaxiality, which not only increases testing costs and time but may also affect the insulator's actual performance. Therefore, there is an urgent need for specialized tooling that can quickly, accurately, efficiently, and non-destructively test the coaxiality of high-voltage insulators to meet the quality control requirements of GIS equipment manufacturing and maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a coaxiality testing fixture for high-voltage insulators used in GIS, thereby solving the technical problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model discloses a coaxiality testing fixture for high-voltage insulators used in GIS, comprising a top plate and a base plate arranged in parallel. A handle is fixedly installed on the upper part of the top plate, and two guide sleeves are symmetrically fixedly installed on the lower part of the top plate. Guide posts are fixedly installed on the upper part of the base plate at positions corresponding to the two guide sleeves, and the two guide posts are slidably inserted into the lower part of the corresponding guide sleeves. The top plate and the base plate are respectively provided with assembly hole one and assembly hole two of the same specifications for installing the testing fixture in the middle part, and the axes of assembly hole one and assembly hole two are aligned.

[0007] Furthermore, a steel ball retaining sleeve is provided between each of the guide posts and the corresponding guide sleeve. Multiple steel balls are evenly and densely distributed on the peripheral wall of each steel ball retaining sleeve. The inner ends of the multiple steel balls on the steel ball retaining sleeve are in contact with the outer wall of the guide post, and the outer ends of the multiple steel balls on the steel ball retaining sleeve are in contact with the inner wall of the guide sleeve.

[0008] Furthermore, each of the guide posts is fitted with a black wire compression spring at the location between the substrate and the steel ball retaining sleeve.

[0009] Furthermore, when the high-voltage insulator being tested is an insulating torsion bar, shaft-shaped insulating torsion bar fixtures are respectively inserted into the first and second assembly holes, and the opposite ends of the two insulating torsion bar fixtures are used to engage with the two ends of the central hole of the insulating torsion bar.

[0010] Furthermore, when the high-voltage insulator being tested is an insulating cylinder, an insulating cylinder fixture is provided in the first assembly hole and the second assembly hole, respectively. The insulating cylinder fixture includes a connecting plate. One end of the connecting plate is provided with a connecting pin that matches its axis for insertion and engagement with the corresponding first assembly hole or the second assembly hole. The other end of the connecting plate is provided with a plurality of testing inserts that are evenly distributed along the circumference, the same number as the end connecting holes of the insulating cylinder.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] This invention, when used with appropriate testing fixtures, enables rapid testing of the coaxiality of insulating torsion bars and insulating cylinders, thereby making the coaxiality inspection process of high-voltage insulators faster and more accurate, and improving the product qualification rate.

[0013] This invention uses a steel ball retaining sleeve with evenly distributed steel balls that fits tightly with the guide post. During movement, the guide post maintains a precise linear trajectory, effectively reducing swaying and offset, thereby achieving high-precision guidance and ensuring the accuracy of insulator coaxiality measurement. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the insulating torsion bar structure to be tested according to this utility model;

[0017] Figure 3 This is a schematic diagram of the insulating torsion bar tooling structure of this utility model;

[0018] Figure 4This is a schematic diagram of the working state of the present invention when testing an insulated torsion bar;

[0019] Figure 5 This is a schematic diagram of the insulating cylinder structure to be tested according to this utility model;

[0020] Figure 6 This is a schematic diagram of the insulating cylinder tooling structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the working state of the present invention when testing an insulating cylinder;

[0022] Explanation of reference numerals in the attached drawings: 1. Top plate; 2. Base plate; 3. Handle; 4. Guide sleeve; 5. Guide post; 6. Steel ball retaining sleeve; 7. Black wire compression spring; 8. Assembly hole one; 9. Assembly hole two; 10. Insulating torsion bar; 11. Insulating torsion bar fixture; 12. Insulating cylinder; 13. Insulating cylinder fixture; 14. Connecting plate; 15. Connecting pin; 16. Detection rod. Detailed Implementation

[0023] like Figure 1 As shown, a coaxiality testing fixture for high-voltage insulators used in GIS includes a top plate 1 and a base plate 2 arranged in parallel. A handle 3 is fixedly installed on the upper part of the top plate 1, and two vertical guide sleeves 4 are symmetrically fixedly installed on the lower part of the top plate 1. Vertical guide posts 5 are fixedly installed on the upper part of the base plate 2 at positions corresponding to the two guide sleeves 4, and the upper ends of the two guide posts 5 are slidably inserted into the lower parts of the corresponding guide sleeves 4.

[0024] In this embodiment, a steel ball retaining sleeve 6 is installed between each guide post 5 and the corresponding guide sleeve 4. A plurality of steel balls are evenly and densely arranged on the peripheral wall of each steel ball retaining sleeve 6. The inner ends of the plurality of steel balls on the steel ball retaining sleeve 6 are in contact with the outer wall of the guide post 5, and the outer ends of the plurality of steel balls on the steel ball retaining sleeve 6 are in contact with the inner wall of the guide sleeve 4.

[0025] This invention utilizes a steel ball retainer sleeve with evenly distributed steel balls that fits tightly with the guide post. During movement, this ensures the guide post maintains a precise linear trajectory, effectively reducing sway and offset, thus achieving high-precision guidance and ensuring the accuracy of insulator coaxiality measurements. The steel ball retainer is made of high-carbon chromium bearing steel and other high-quality materials. The steel balls are precision-machined, possessing high hardness and excellent wear resistance. This allows them to resist wear and fatigue damage during long-term high-speed movement and frequent start-stop cycles, extending the service life of both the guide post and the steel ball retainer sleeve. The design of the steel ball retainer sleeve results in a tighter fit between the guide post and the sleeve, a more compact structure, and efficient guidance and support functions within a limited space.

[0026] In addition, each of the guide posts 5 is fitted with a black wire spring 7 at the position between the base plate 2 and the steel ball retaining sleeve 6. The upper and lower ends of the black wire spring 7 abut against the lower end face of the steel ball retaining sleeve and the upper surface of the base plate 2, respectively. By providing the black wire spring 7 on the guide post 5, a good cushioning effect can be achieved during the falling process of the top plate 1 and the guide sleeve 2.

[0027] The top plate 1 and the base plate 2 are respectively provided with assembly holes 8 and 9 of the same specifications for installing testing fixtures. The axes of assembly holes 8 and 9 are aligned.

[0028] When the high-voltage insulator being tested is Figure 2 When the insulating torsion bar 10 is shown, the mounting hole 8 and the mounting hole 9 are respectively fitted with the following: Figure 3 The illustrated shaft-shaped insulating torsion bar fixture 11 has two opposing ends for insertion into the two ends of the central hole of the insulating torsion bar 10. During inspection operations, such as... Figure 4 As shown, simply install the insulating torsion bar fixture 11 on the top plate 1 and the base plate 2, then lift the top plate 1 with the handle 3, place the insulating torsion bar 10 on the insulating torsion bar fixture 11 on the base plate 2, and after lowering the top plate 1, if the insulating torsion bar fixture 11 on the top plate enters the upper part of the through hole of the insulating torsion bar 10, the coaxiality of the insulating torsion bar is qualified. If the insulating torsion bar fixture 11 on the top plate cannot cooperate with the upper part of the through hole of the insulating torsion bar 10, the coaxiality of the insulating torsion bar is unqualified.

[0029] When the high-voltage insulator being tested is Figure 5 When the insulating cylinder 12 is shown, the first assembly hole 8 and the second assembly hole 9 are respectively installed with the following: Figure 6 The insulating cylinder fixture 13 shown includes a connecting plate 14. One end of the connecting plate 14 is provided with a connecting pin 15 that aligns with its axis for insertion into the corresponding assembly hole 8 or assembly hole 9. The other end of the connecting plate 14 has a plurality of detection inserts 16 evenly spaced circumferentially, the same number as the end connection holes of the insulating cylinder 12. During maintenance and inspection operations, such as... Figure 7 As shown, an insulating cylinder fixture 13 is installed on the top plate 1 and the base plate 2. Then, the top plate 1 is lifted by the handle 3, and an insulating cylinder 12 is placed on the insulating cylinder fixture 13 on the base plate 2. Each detection pin 16 of the insulating cylinder fixture 13 on the base plate 2 is inserted and engaged with the corresponding connection hole at the lower end of the insulating cylinder 12. Then, the top plate 1 is lowered. If each detection pin 16 of the insulating cylinder fixture 13 on the top plate 1 can be inserted and engaged with the corresponding connection hole at the lower end of the insulating cylinder 12, then the coaxiality of the insulating cylinder is qualified.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A coaxiality detection tool for high-voltage insulators for GIS, characterized in that: The device includes a top plate and a base plate arranged in parallel. A handle is fixedly installed on the upper part of the top plate, and two guide sleeves are symmetrically fixedly installed on the lower part of the top plate. Guide posts are fixedly installed on the upper part of the base plate at positions corresponding to the two guide sleeves. The two guide posts are slidably inserted into the lower part of the corresponding guide sleeves. The top plate and the base plate are respectively provided with assembly hole one and assembly hole two of the same specifications for installing testing fixtures in the middle part. The axes of assembly hole one and assembly hole two are aligned.

2. The coaxiality testing fixture for high-voltage insulators used in GIS according to claim 1, characterized in that: A steel ball retaining sleeve is provided between each of the guide posts and the corresponding guide sleeve. Multiple steel balls are evenly and densely distributed on the peripheral wall of each steel ball retaining sleeve. The inner ends of the multiple steel balls on the steel ball retaining sleeve are in contact with the outer wall of the guide post, and the outer ends of the multiple steel balls on the steel ball retaining sleeve are in contact with the inner wall of the guide sleeve.

3. The high-voltage insulator coaxiality detection tool for GIS according to claim 2, characterized in that: Each of the guide posts is fitted with a black wire compression spring at the location between the substrate and the steel ball retaining sleeve.

4. The high-voltage insulator coaxiality detection tool for GIS according to claim 1, characterized in that: When the high-voltage insulator being tested is an insulating torsion bar, shaft-shaped insulating torsion bar fixtures are respectively inserted into the first and second assembly holes. The opposite ends of the two insulating torsion bar fixtures are used to engage with the two ends of the central hole of the insulating torsion bar.

5. The high-voltage insulator coaxiality detection tool for GIS according to claim 1, characterized in that: When the high-voltage insulator being tested is an insulating cylinder, an insulating cylinder fixture is provided in the first assembly hole and the second assembly hole respectively. The insulating cylinder fixture includes a connecting plate. One end of the connecting plate is provided with a connecting pin that matches its axis and is used to insert and cooperate with the corresponding first assembly hole or the second assembly hole. The other end of the connecting plate is provided with a plurality of testing inserts that are evenly distributed along the circumference, the same number as the end connecting holes of the insulating cylinder.

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