Ultra-space-saving pressure-resistant unit tooling

Abstract

The utility model relates to a kind of super space-saving pressure-resistant unit tooling, including the upper end insulator, multiple middle insulators and lower end insulator sequentially arranged from top to bottom, the upper end insulator is connected with its adjacent middle insulator by front end cylinder, and the contact upper end of upper end insulator is equipped with long conductor, and the contact of upper end insulator is connected with the contact of its adjacent middle insulator by long conductive spring;The lower end insulator is connected with its adjacent middle insulator, and the contact of adjacent two middle insulators is connected with unit conductive spring by unit cylinder between the lower end insulator and its adjacent middle insulator;The bottom of lower end insulator is connected with end cylinder, and inflation port is equipped on the front end cylinder and end cylinder.The utility model is suitable for the pressure-resistant, partial discharge test of epoxy pouring insulator in space limited environment, can be super space-saving, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of insulator withstand voltage testing technology, specifically to a space-saving withstand voltage unit tooling. Background Technology

[0002] High-voltage switchgear is one of the most technically demanding and difficult-to-manufacture pieces of equipment in high-voltage power transmission projects. Epoxy-cast insulators are crucial components of high-voltage switchgear, and their performance directly determines the insulation performance and operational reliability of the switchgear. Among these, the electrical properties of epoxy-cast insulators (including withstand voltage and partial discharge) are particularly important. With the increasing demands of customers for epoxy-cast insulators, improving the efficiency of insulator electrical performance testing is urgently needed. Therefore, in space-constrained withstand voltage testing areas, shortening the length of withstand voltage testing fixtures and increasing the number of products tested per test becomes paramount.

[0003] Due to limitations in contact size and ground clearance, the lengths of the front and rear sections of the pressure-resistant fixture are currently difficult to alter. Therefore, the only option is to focus on the middle pressure-resistant unit fixture, minimizing the unit cylinder length while ensuring the unit contact size closely approximates the actual operating conditions. Since conventional unit cylinders are formed by welding the flanges at both ends to the middle cylinder, the length is difficult to further shorten due to limitations in welding torch size. This fails to meet the requirements of reducing the length of the pressure-resistant fixture and increasing the number of pressure-resistant products produced per cycle. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a space-saving withstand voltage unit tooling, which is more suitable for withstand voltage and partial discharge testing of epoxy cast insulators in space-constrained environments. It can save space and improve testing efficiency.

[0005] This utility model is achieved through the following technical solution: a space-saving withstand voltage unit tooling, including an upper insulator, multiple middle insulators and a lower insulator arranged from top to bottom. The upper insulator is connected to its adjacent middle insulator through a front end cylinder, and a long conductor is installed at the upper end of the contact of the upper insulator. A long conductive spring is connected between the contact of the upper insulator and the contact of its adjacent middle insulator. The lower insulator is connected to its adjacent middle insulator and to two adjacent middle insulators through unit tubes, and a unit conductive spring is connected between the contact of the lower insulator and the contact of its adjacent middle insulator and to two adjacent middle insulators. The bottom of the lower insulator is connected to an end cylinder, and both the front end cylinder and the end cylinder are provided with air inlets.

[0006] As an optimization, a long contact seat is connected between the contact of the upper insulator and the contact of the adjacent middle insulator, and the long conductive spring is installed in the long contact seat.

[0007] As an optimization, unit contact seats are connected between the contact of the lower insulator and the contact of its adjacent middle insulator, and between the contacts of two adjacent middle insulators, and the unit conductive spring is installed inside the unit contact seat.

[0008] As an optimization, the upper insulator, the middle insulator, and the front cylinder are connected by bolts.

[0009] As an optimization, the lower insulator, the middle insulator, and the unit cylinder are connected by bolts.

[0010] As an optimization, the two adjacent middle insulators are connected to the unit cylinder by bolts.

[0011] As an optimization, a shielding cover is installed at the lower end of the contact of the lower insulator.

[0012] As an optimization, a long conductor is installed at the upper end of the contact of the upper insulator.

[0013] The beneficial effects of this utility model are as follows: This fixture uses the upper and lower insulators as the end structures of the test fixture. Based on the varying number of insulators in the middle section, an innovative unit cylinder structure is used, replacing the conventional welded unit cylinder with a combined flange structure unit cylinder. This overcomes the difficulty in shortening the unit cylinder size due to limitations imposed by the welding torch size. The unit cylinder length can be minimized according to the unit contact size, and the number of withstand voltage unit cylinders can be flexibly adjusted based on the number of withstand voltage tests conducted on the middle insulators, thus testing the electrical performance of epoxy-cast insulators. The withstand voltage unit fixture features space saving, lightweight design, high testing efficiency, and stable and reliable testing, making it more suitable for withstand voltage and partial discharge testing of epoxy-cast insulators in space-constrained environments, significantly saving space and improving testing efficiency. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention; As shown in the figure: 1. Upper insulator, 2. Middle insulator, 3. Lower insulator, 4. Front tube, 5. Unit tube, 6. End tube, 7. Fastening bolt, 8. Long contact seat, 9. Long conductive spring, 10. Unit contact seat, 11. Unit conductive spring, 12. Contact, 13. Air inlet. Detailed Implementation

[0015] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0016] like Figure 1As shown, a space-saving withstand voltage unit tooling includes an upper insulator 1, multiple middle insulators 2, and a lower insulator 3 arranged sequentially from top to bottom. In this embodiment, the upper insulator 1, middle insulators 2, and lower insulator 3 have the same structure.

[0017] The upper insulator 1 and its adjacent middle insulator 2 are connected by a front end cylinder 4. Specifically, the upper insulator 1, the middle insulator 2, and the front end cylinder 4 are connected by bolts. The front end cylinder 4 includes a first annular cylinder and first flanges fixed to the upper and lower ends of the first annular cylinder. In this embodiment, the two first flanges of the front end cylinder 4 are respectively bolted to the flanges of the upper insulator 1 and the middle insulator 2, thereby forming a sealed cavity between the upper insulator 1 and the adjacent middle insulator 2.

[0018] A long conductor 7 is installed at the upper end of the contact 12 of the upper insulator 1. The long conductor 7 is fixed to the contact 12 of the upper insulator 1 by screws.

[0019] A long conductive spring 9 is connected between the contact 12 of the upper insulator 1 and the contact 12 of the adjacent middle insulator 2. Specifically, a long contact seat 8 is connected between the contact 12 of the upper insulator 1 and the contact 12 of the adjacent middle insulator 2, and the long conductive spring 9 is installed in the long contact seat 8. In this embodiment, the upper and lower ends of the long contact seat 8 are provided with slots to facilitate engagement and fixation with the corresponding contact 12. Furthermore, a first mounting groove for accommodating the long conductive spring 9 is provided in the center of the long contact seat 8, allowing the long conductive spring 9 to be housed within the first mounting groove, thereby connecting the adjacent insulators.

[0020] The lower insulator 3 is connected to its adjacent middle insulator 2, and two adjacent middle insulators 2 are connected to each other via unit cylinders 5. Specifically, the lower insulator 3, the middle insulator 2, and the unit cylinder 5 are connected by bolts. Two adjacent middle insulators 2 are also connected to the unit cylinder 5 via bolts.

[0021] In this embodiment, the unit cylinder 5 includes a second annular cylinder and a second flange fixed to the upper and lower ends of the second annular cylinder. The flange of the lower insulator 3 and the flange of the adjacent middle insulator 2 are screwed and fixed to the second flange of the unit cylinder 5, thereby forming a sealed cavity between the lower insulator 3 and the adjacent middle insulator 2. Similarly, the flanges of two adjacent middle insulators 2 are screwed and fixed to the second flange of the unit cylinder 5, thereby forming a sealed cavity between the two middle insulators 2.

[0022] Unit conductive springs 11 are connected between the contact 12 of the lower insulator 3 and the contact 12 of the adjacent middle insulator 2, and between the contacts 12 of two adjacent middle insulators 2. Specifically, unit contact seats 10 are connected between the contact 12 of the lower insulator 3 and the contact 12 of the adjacent middle insulator 2, and between the contacts 12 of two adjacent middle insulators 2, and the unit conductive springs 11 are installed in the unit contact seats 10. In this embodiment, the upper and lower ends of the unit contact seats 10 are provided with slots to facilitate locking and fixing with the corresponding contacts 12. Furthermore, a second mounting groove for accommodating the unit conductive springs 11 is provided in the center of the unit contact seats 10, allowing the unit conductive springs 11 to be accommodated within the second mounting groove, thereby connecting adjacent insulators.

[0023] The bottom of the lower insulator 3 is connected to an end cylinder 6. Specifically, the end cylinder 6 includes a third annular cylinder, the upper end of which is fixedly connected to a third flange, and the lower end of which is fixedly connected to a sealing plate. The end cylinder 6 is bolted to the flange of the lower insulator 3 via the third flange.

[0024] The lower end of the contact 12 of the lower insulator 3 is equipped with a shielding cover to shield the electric field and ensure the safety of the test.

[0025] Both the front end cylinder 4 and the end cylinder 6 are provided with air inlets 13, through which SF6 gas is filled.

[0026] Instructions for use: During the test, prepare the required number of insulators. Take two insulators to serve as the upper insulator 1 and the lower insulator 3, respectively, and use the remaining insulators as the middle insulators 2. First, install a shielding cover at the lower end of the contact 12 of the lower insulator 3, and install the end cylinder 6 at the bottom of the lower insulator 3. Then, install a unit contact seat 10 at the upper end of the contact 12 of the lower insulator 3, place a unit conductive spring 11 inside the unit contact seat 10, and then fix the unit cylinder 5 to the lower insulator 3. Continue this process, installing and fixing multiple middle insulators 2 sequentially from bottom to top. Next, install a long contact seat 8 and a long conductive spring 9 on the contact 12 of the uppermost middle insulator 2, and fix the front end cylinder 4 to the uppermost middle insulator 2. Finally, install the upper insulator 1 on the upper end of the front end cylinder 4, and fix a long conductor 7 to the upper end of the contact 12 of the upper insulator 1. After installation, the pressure-resistant fixture is evacuated and filled with SF6 gas through the air inlet 13, and finally connected to the pressure-resistant equipment for electrical performance testing.

[0027] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A space-saving withstand voltage unit tooling, comprising an upper insulator (1), multiple middle insulators (2), and a lower insulator (3) arranged from top to bottom, characterized in that: The upper insulator (1) is connected to the adjacent middle insulator (2) via a front end cylinder (4), and a long conductive spring (9) is connected between the contact (12) of the upper insulator (1) and the contact (12) of the adjacent middle insulator (2). The lower insulator (3) is connected to its adjacent middle insulator (2) and to two adjacent middle insulators (2) through unit cylinders (5), and unit conductive springs (11) are connected between the contact (12) of the lower insulator (3) and the contact (12) of its adjacent middle insulator (2) and to two adjacent middle insulators (2). The bottom of the lower insulator (3) is connected to an end cylinder (6), and both the front end cylinder (4) and the end cylinder (6) are provided with air inlets (13).

2. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: A long contact seat (8) is connected between the contact (12) of the upper insulator (1) and the contact (12) of the adjacent middle insulator (2), and the long conductive spring (9) is installed in the long contact seat (8).

3. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: Unit contact seats (10) are connected between the contact (12) of the lower insulator (3) and the contact (12) of the adjacent middle insulator (2), and between the contacts (12) of two adjacent middle insulators (2). The unit conductive spring (11) is installed in the unit contact seat (10).

4. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: The upper insulator (1), the middle insulator (2), and the front cylinder (4) are connected by bolts.

5. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: The lower insulator (3), the middle insulator (2), and the unit tube (5) are connected by bolts.

6. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: The two adjacent middle insulators (2) are connected to the unit cylinder (5) by bolts.

7. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: The lower end of the contact (12) of the lower insulator (3) is equipped with a shield.

8. The ultra-space-saving pressure-resistant unit tooling according to claim 1, characterized in that: A long conductor (7) is installed on the upper end of the contact (12) of the upper insulator (1).

Images