Insulating column product large tank pressure-resistant tooling

Abstract

The utility model relates to a kind of big tank pressure-resisting tool of insulating columnar product, including pressure-resisting tank, ground plate and high voltage plate being oppositely distributed in the pressure-resisting tank are equipped, multiple the insulating column is equipped between ground plate and high voltage plate, multiple insulating column is arranged along pressure-resisting tank axial direction, one end of insulating column near high voltage plate is connected with high voltage plate by high voltage shield cover, one end of insulating column near ground plate is connected with ground plate by low voltage shield cover, the tank mouth of pressure-resisting tank is installed with insulating basin, high voltage plate is connected with the contact of insulating basin by conducting rod, ground plate is connected with pressure-resisting tank. The utility model is suitable for the pressure resistance, partial discharge test of insulating columnar product, can test multiple products at a time, greatly improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pressure resistance testing technology for insulating column products, specifically to a pressure resistance testing fixture for a large tank of insulating column products. 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.

[0003] Insulating pillar products are numerous and have relatively stable electrical properties. Using conventional pressure testing fixtures is limited by port size, allowing only one insulating pillar to be tested at a time, resulting in a small number of products tested per run and failing to meet the requirements for improved testing efficiency. While using large pressure tanks for testing offers greater capacity and can accommodate multiple products, simultaneous testing of multiple products presents the problem of poor conductivity. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a pressure-resistant fixture for large tanks of insulating column products. It can perform pressure and partial discharge tests on multiple insulating column products at once, ensuring stable testing and greatly improving testing efficiency.

[0005] This utility model is achieved through the following technical solution: a pressure-resistant tooling for a large tank of insulating pillar-type products, including a pressure-resistant tank. The pressure-resistant tank contains a grounding plate and a high-voltage plate arranged vertically opposite to each other. Multiple insulating pillars are arranged between the grounding plate and the high-voltage plate, along the axial direction of the pressure-resistant tank. One end of each insulating pillar near the high-voltage plate is connected to the high-voltage plate via a high-voltage shield, and the other end near the grounding plate is connected to the grounding plate via a low-voltage shield. An insulating basin is installed on the opening of the pressure-resistant tank. The high-voltage plate is connected to the contact of the insulating basin via a conductive rod. The grounding plate is connected to the pressure-resistant tank.

[0006] This solution places multiple insulating posts between the ground plane and the high-voltage board, connects these posts in series with the high-voltage board, and then grounds them in series with the ground plane. This allows for simultaneous testing of multiple insulating posts, significantly improving testing efficiency. The two ends of each insulating post are connected to the ground plane and high-voltage board respectively via high- and low-voltage shields to prevent electric field disruption, thus ensuring the stability and safety of withstand voltage and partial discharge tests.

[0007] As an optimization, the pressure tank is equipped with two grounding plates, one above the other, with the high-voltage plate located between them. Multiple insulating posts are arranged between the high-voltage plate and both grounding plates. This optimized solution forms two layers of insulating posts between the two grounding plates and the high-voltage plate, significantly increasing the number of insulating posts that can be tested and further improving testing efficiency.

[0008] As an optimization, the low-voltage shielding cover is connected to the ground plane via bolts. In this optimized solution, the low-voltage shielding cover is connected to the ground plane via bolts for electrical continuity.

[0009] As an optimization, the high-voltage shield is connected to the high-voltage plate via bolts. In this optimized solution, the high-voltage shield is connected to the high-voltage plate via bolts for electrical conductivity.

[0010] As an optimization, both the low-voltage and high-voltage shielding covers are provided with annular slots, and the two ends of the insulating column are respectively snapped into the annular slots of the high-voltage and low-voltage shielding covers. This optimized design secures the ends of the insulating column to the high-voltage and low-voltage shielding covers, facilitating installation.

[0011] As an optimization, inserts are embedded at both ends of the insulating platform, and these inserts are connected to the high and low voltage shields via conductive springs. This optimization enhances the conductivity between the insulating platform and the high and low voltage shields through the conductive springs, further improving test stability.

[0012] As an optimization, the flange of the insulating basin is bolted to the opening of the pressure tank. This optimization facilitates the assembly and disassembly of the insulating basin.

[0013] As an optimization, the contacts of the insulating basin are fixedly connected to a contact seat, and the conductive rod is inserted into the contact seat. This optimized design facilitates connection and conduction between the conductive rod and the insulating basin when the insulating basin's opening is closed.

[0014] The beneficial effects of this invention are as follows: It fully utilizes the large volume of the pressure tank, integrating multiple insulating columns into a single unit, allowing for simultaneous electrical performance testing of multiple insulating columns, significantly improving testing efficiency. The two ends of the insulating column are connected to the grounding plate and high-voltage plate respectively via high- and low-voltage shielding covers. The inserts of the insulating column are connected to the high- and low-voltage shielding covers via conductive springs, further improving assembly efficiency. This large-tank pressure-resistant fixture for insulating columns features convenient assembly, high testing efficiency, and reliable performance, ensuring the stability and safety of withstand voltage and partial discharge tests. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the present invention; Figure 2 This is a side sectional view of the present invention; As shown in the figure: 1. Pressure tank, 2. Grounding plate, 3. High voltage plate, 4. Insulating column, 5. High voltage shield, 6. Low voltage shield, 7. Conductive rod, 8. Insulating basin, 9. Contact seat, 10. Annular groove, 11. Insert, 12. Conductive spring. Detailed Implementation

[0016] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0017] like Figure 1 , 2 As shown, a pressure-resistant fixture for a large tank containing insulating pillars includes a pressure-resistant tank 1. In this embodiment, the pressure-resistant tank 1 is horizontally fixed with its central axis facing one side, facilitating personnel entry to install the insulating pillars 4. Both ends of the pressure-resistant tank 1 have openings. One end of the opening is fixedly connected to an insulating basin 8, the flange of which is bolted to the opening of the pressure-resistant tank 1. The other end of the opening is an inlet / outlet and is equipped with a tank door (not shown in the figure) for easy personnel access. The pressure-resistant tank is also equipped with a gas filling port (not shown in the figure) for filling with SF6 gas.

[0018] The pressure tank 1 contains a grounding plate 2 and a high-voltage plate 3 arranged vertically opposite to each other. Both the grounding plate 2 and the high-voltage plate 3 extend axially along the pressure tank 1. Multiple insulating pillars 4 are positioned between the grounding plate 2 and the high-voltage plate 3, arranged axially along the pressure tank 1. The high-voltage plate 3 is connected to the contacts of an insulating basin 8 via a conductive rod 7. In this embodiment, the contacts of the insulating basin 8 are fixedly connected to a contact seat 9. One end of the conductive rod 7 is fixedly connected to the high-voltage plate, and the other end is inserted into the contact seat 9, facilitating connection and conduction between the conductive rod 7 and the insulating basin 8. The grounding plate 2 is connected to the pressure tank 1.

[0019] Specifically, the pressure tank 1 contains two grounding plates 2, arranged vertically. The high-voltage plate 3 is located between the two grounding plates 2, and multiple insulating columns 4 are arranged between the high-voltage plate 3 and the two grounding plates 2. The formation of two layers of insulating columns 4 between the two grounding plates 2 and the high-voltage plate 3 significantly increases the number of insulating columns 4 that can be tested, further improving testing efficiency. In this embodiment, the lower grounding plate 2 is fixed to the bottom of the pressure tank 1, and the upper grounding plate 2 is placed on the upper insulating columns 4. The grounding plates 2 can be electrically connected to the pressure tank 1 via overlapping wires, and the high-voltage plate 3 is sandwiched between the upper and lower insulating columns 4.

[0020] Specifically, the end of the insulating column 4 near the high-voltage plate 3 is connected to the high-voltage plate 3 via a high-voltage shield 5. The high-voltage shield 5 is bolted to the high-voltage plate 3 to achieve electrical connection. The end of the insulating column 4 near the grounding plate 2 is connected to the grounding plate 2 via a low-voltage shield 6. The low-voltage shield 6 is bolted to the grounding plate 2 to achieve electrical connection.

[0021] By placing multiple insulating posts 4 between the grounding plate 2 and the high-voltage plate 3, connecting them in series with the high-voltage plate 3, and then grounding them in series with the grounding plate 2, multiple insulating posts 4 can be tested simultaneously, greatly improving testing efficiency. The two ends of each insulating post 4 are connected to the grounding plate 2 and the high-voltage plate 3 respectively via high- and low-voltage shields 6, preventing electric field disturbances and ensuring the stability and safety of withstand voltage and partial discharge tests.

[0022] In this embodiment, both the low-voltage shield 6 and the high-voltage shield 5 are provided with annular slots 10. The two ends of the insulating column 4 are respectively engaged within the annular slots 10 of the high- and low-voltage shield 6, facilitating the installation of the insulating column 4. Each end of the insulating column 4 is fitted with an insert 11, which is connected to the high- and low-voltage shield 6 via conductive springs 12. Each insert 11 has a receiving groove for accommodating the conductive spring 12. When the insulating column 4 is engaged in the annular slot 10, one end of the conductive spring 12 contacts the insert 11, and the other end contacts the corresponding shield. This enhances the conductivity between the insulating column 4 and the high- and low-voltage shield 6 through the conductive spring 12, further improving test stability.

[0023] Instructions for use: First, install the high-voltage shield 5 and low-voltage shield 6 at both ends of the insulating column 4. Place and fix multiple insulating columns 4 on the lower grounding plate 2, ensuring the low-voltage shield 6 is securely connected to the grounding plate 2, completing the installation of the lower insulating column 4. Then connect the high-voltage plate 3 to the high-voltage shield 5 of the lower insulating column 4. Next, place and fix another layer of insulating columns 4 on top of the high-voltage plate 3, and place and fix the upper grounding plate 2 on the upper insulating column 4. Connect the grounding plate 2 to the pressure tank 1 for conductivity, and insert the high-voltage plate into the contact seat of the insulating basin for conductivity. Finally, close the tank door, connect the contacts of the insulating basin 8 to the pressure-resistant power supply equipment, evacuate the pressure tank, fill it with SF6 gas, and then perform withstand voltage and partial discharge tests.

[0024] 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 pressure-resistant tooling for a large tank of insulating column-type products, comprising a pressure-resistant tank (1), characterized in that: The pressure tank (1) is provided with a grounding plate (2) and a high-voltage plate (3) arranged opposite to each other. Multiple insulating columns (4) are provided between the grounding plate (2) and the high-voltage plate (3). The multiple insulating columns (4) are arranged along the axial direction of the pressure tank (1). The end of the insulating column (4) near the high-voltage plate (3) is connected to the high-voltage plate (3) through a high-voltage shield (5). The end of the insulating column (4) near the grounding plate (2) is connected to the grounding plate (2) through a low-voltage shield (6). An insulating basin (8) is installed on the opening of the pressure tank (1). The high-voltage plate (3) is connected to the contact of the insulating basin (8) through a conductive rod (7). The grounding plate (2) is connected to the pressure tank (1).

2. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: The pressure tank (1) is provided with two grounding plates (2), which are distributed vertically. The high-voltage plate (3) is located between the two grounding plates (2), and multiple insulating columns (4) are arranged between the high-voltage plate (3) and the upper and lower grounding plates (2).

3. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: The low-pressure shield (6) is connected to the grounding plate (2) by bolts.

4. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: The high-voltage shield (5) is connected to the high-voltage plate (3) by bolts.

5. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: Both the low-voltage shield (6) and the high-voltage shield (5) are provided with annular slots (10), and the two ends of the insulating column (4) are respectively engaged in the annular slots (10) of the high-voltage shield (5) and the low-voltage shield (6).

6. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 5, characterized in that: Both ends of the insulating platform (4) are fitted with inserts (11), and the inserts (11) at both ends are connected to the high-voltage shield (5) and the low-voltage shield (6) through conductive springs (12).

7. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: The flange of the insulating basin (8) is bolted to the opening of the pressure tank (1).

8. The pressure-resistant fixture for large tanks of insulating column-type products according to claim 1, characterized in that: The insulated basin (8) has a contact seat (9) fixedly connected to its contact, and the conductive rod (7) is inserted into the contact seat (9).

Images