Epoxy pot-type insulator rotating water pressure test tool

Abstract

The utility model relates to an epoxy potting pot type insulator rotation hydrostatic test tool, including support frame and test base plate, test base plate passes through horizontal pivot and is rotatably connected with support frame, the pot type insulator can be detachably fixed on the test base plate, and the test base plate is equipped with the water injection pipe, the discharge pipe and the pressurizing pipe that communicate with the recess cavity of the pot type insulator, and the water injection pipe, the discharge pipe and the pressurizing pipe all are equipped with the switch valve. The utility model test base plate can overturn on the support frame around the horizontal pivot, and the pot type insulator is fixed on the test base plate during the test, and the test base plate drives the pot type insulator to overturn. First, the recess cavity of the pot type insulator faces upwards, at this moment, water is injected into the recess cavity, the gas in the recess cavity can be all discharged through the discharge pipe, the air pocket phenomenon is avoided, water is injected in the recess cavity more full, and the test accuracy is guaranteed. After water injection, the test base plate is rotated again, the recess cavity faces downwards, that is, the test can be added, the operation is simple, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of water pressure testing technology for basin-type insulators, specifically to a rotating water pressure testing fixture for epoxy-cast basin-type insulators. 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 components, the pressure-bearing capacity of epoxy-cast insulators is particularly important, and the pressure-bearing strength is tested using a hydrostatic test.

[0003] Currently, the hydrostatic test of basin insulators generally uses a fixed fixture. During the test, the concave cavity of the insulator basin must be fixed on the fixture with the concave cavity facing downward (same as the working state) and water must be injected into the concave cavity. Due to incomplete venting during water injection, gas will accumulate at the top of the concave cavity and cannot be discharged, forming a cavitation phenomenon. As a result, the cavity is not completely filled with water (the measured residual gas volume is 8%-15%), which seriously affects the accuracy of the test. Moreover, the existing fixture has a complicated procedure and low operating efficiency (single operation takes more than 45 minutes). Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a rotating hydrostatic testing fixture for epoxy cast basin insulators.

[0005] This utility model is achieved through the following technical solution: a rotating hydrostatic test fixture for epoxy-cast basin insulators, comprising a support frame and a test base plate. The test base plate is rotatably connected to the support frame via a horizontal rotating shaft. The basin insulator is detachably fixed to the test base plate. The test base plate is provided with a water injection pipe, a discharge pipe, and a pressurization pipe communicating with the cavity of the basin insulator. Switch valves are installed on the water injection pipe, the discharge pipe, and the pressurization pipe.

[0006] This test base plate can be rotated around a horizontal axis on a support frame. During testing, the pot-type insulator is fixed to the test base plate, which allows the pot-type insulator to rotate. First, the concave cavity of the pot-type insulator faces upwards. Water is then injected into the cavity through the water injection pipe, allowing all air inside to be expelled through the exhaust pipe, preventing cavitation and ensuring a more complete filling of the cavity, thus guaranteeing test accuracy. After water injection, the test base plate is rotated so that the concave cavity faces downwards, allowing for pressure testing. The operation is simple and convenient.

[0007] As an optimization, an equalizing flange is also included. The equalizing flange is positioned opposite to the test base plate and connected by bolts. The flange of the basin insulator is fixed between the test base plate and the equalizing flange by bolts. This optimized solution uses the equalizing flange to press the flange of the basin insulator onto the test base plate, ensuring a tight fit between the insulator and the test base plate, thus improving the sealing effect.

[0008] As an optimization, the support frame includes a base and two support platforms fixed to the base. The two support platforms are arranged opposite each other, and each support platform is fixed with a bearing seat. Two rotating shafts are fixed opposite each other on the side wall of the test base plate, and the two rotating shafts are rotatably connected to the two bearing seats respectively. In this optimized scheme, the test base plate is rotatably connected to the two bearing seats of the support frame through the two rotating shafts, ensuring stability during flipping.

[0009] As an optimization, the support frame is equipped with a limiting mechanism, which locks the basin-type insulator in place when the cavity faces downwards. This optimized solution stabilizes the basin-type insulator through the locking of the limiting mechanism, facilitating hydrostatic testing.

[0010] As an optimization, the limiting mechanism includes two pin-type limiting pins, which are respectively mounted on two support platforms and located on both sides of the line connecting the two bearing seats. When the concave cavity of the basin insulator faces downwards, the pin-type limiting pins can support the bottom surface of the test base plate. In this optimized solution, when the concave cavity of the basin insulator faces downwards, the test base plate is located below the basin insulator. At this time, by inserting the pin-type limiting pins into the bottom of the test base plate and supporting the test base plate with the two limiting pins, the basin insulator can be kept in a downward-facing state, ensuring stability and ease of use.

[0011] As an optimization, a handle is fixed to the side wall of the test base plate. This optimization makes it easier for personnel to rotate the test base plate.

[0012] As an optimization, the support frame is equipped with a drive mechanism to rotate the test base plate. This optimized solution uses a drive mechanism to rotate the test base plate, which is more labor-saving and more efficient.

[0013] The beneficial effects of this utility model are as follows: the test base plate is rotated by the drive mechanism to achieve a 180° flip of the basin insulator. During the water injection stage, the concave cavity of the basin insulator faces upward to ensure complete water filling. During the test stage, the concave cavity faces downward to simulate the actual stress state. The flipping station design optimizes the posture of the two processes of "water injection and venting" and "pressure testing", ensuring test readiness and improving test efficiency. Compared with the traditional method, the test efficiency is increased by more than 40%, and the leakage accident rate is reduced by 90%. The tooling has a modular flange interface, which can be adapted to different specifications of insulation basins.

[0014] Furthermore, this fixture achieves a double-sealing structure by clamping the flange of the pot-type insulator with an equalizing flange and a test base plate. A limiting mechanism is used to lock the state of the pot-type insulator, ensuring test stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the water injection state of this utility model; Figure 2 This is a schematic diagram of the water pressure test state of this utility model; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the test base plate, basin insulator, and equalizing flange structure. As shown in the figure: 1. Test base plate, 2. Support frame, 21. Base, 22. Support platform, 23. Bearing seat, 3. Rotating shaft, 4. Basin insulator, 5. Equalizing flange, 6. Water injection pipe, 7. Pressurizing pipe, 8. Discharge pipe, 9. Pin-type limit pin, 91. Pin seat, 92. Pin rod, 10. Servo motor, 11. Handle. 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 Figures 1-4 As shown, a rotating hydrostatic test fixture for epoxy cast pot insulators includes a support frame 2 and a test base plate 1. The test base plate 1 is rotatably connected to the support frame 2 via a horizontal rotating shaft 3.

[0018] Specifically, the support frame 2 includes a base 21 and two support platforms 22 fixed to the base 21, with the two support platforms 22 arranged opposite to each other. Each of the two support platforms 22 is fixed with a bearing seat 23, and two rotating shafts 3 are fixed opposite to each other on the side wall of the test base plate 1. The two rotating shafts 3 are rotatably connected to the two bearing seats 23 respectively to ensure the stability of the test base plate 1 when it is flipped.

[0019] The basin-type insulator 4 is detachably fixed to the test base plate 1. The test base plate 1 is provided with a water injection pipe 6, a discharge pipe 8, and a pressurization pipe 7 that communicate with the cavity of the basin-type insulator 4. Switch valves are installed on the water injection pipe 6, the discharge pipe 8, and the pressurization pipe 7.

[0020] Specifically, the fixture also includes an equalizing flange 5, which is positioned opposite to the test base plate 1 and connected by bolts. The flange of the basin insulator 4 is fixed between the test base plate 1 and the equalizing flange 5 by bolts.

[0021] The flange of the pot insulator 4 is pressed tightly onto the test base plate 1 by the equalizing flange 5, so that the insulator and the test base plate 1 are tightly fitted and assembled, improving the sealing effect of both. The test base plate 1 can be rotated around the horizontal pivot 3 on the support frame 2. During the test, the pot insulator 4 is fixed on the test base plate 1, and the rotation of the test base plate 1 can drive the pot insulator 4 to rotate.

[0022] Preferably, a handle 11 is fixedly connected to the side wall of the test base plate 1, and personnel can rotate the test base plate 1 through the handle 11.

[0023] In this embodiment, the support frame 2 is equipped with a drive mechanism for rotating the test base plate 1. The drive mechanism is a servo motor 10, which is fixedly mounted on one of the support platforms. The output shaft of the servo motor 10 is connected to the rotating shaft 3 on the support platform. Driving the test base plate 1 to rotate via the servo motor 10 is more labor-saving and more efficient.

[0024] In this embodiment, the support frame 2 is also equipped with a limiting mechanism, which is used to lock the flipped state of the basin-type insulator 4. When the concave cavity of the basin-type insulator 4 faces downward, it is locked and fixed by the limiting mechanism. By locking the limiting mechanism, the basin-type insulator 4 remains stable, facilitating the hydrostatic test.

[0025] Specifically, the limiting mechanism includes two pin-type limiting pins 9, which are respectively mounted on two support platforms 22 and located on both sides of the line connecting the two bearing seats 23. When the concave cavity of the basin insulator 4 faces downward, the pin-type limiting pins 9 can be supported on the bottom surface of the test base plate 1.

[0026] The pin-type limiting pin 9 described in this embodiment includes a pin seat 91 and a pin rod 92. The pin seat 91 is fixedly installed on the support platform, and the pin rod 92 is horizontally slidably connected to the pin seat 91, sliding towards or away from the test base plate 1. When the concave cavity of the basin insulator 4 faces downward, the test base plate 1 is located below the basin insulator 4. At this time, the pin rod 92 slides close to the test base plate 1, with one end inserted into the bottom of the test base plate 1, thus supporting and limiting its position at the bottom of the test base plate 1. By limiting the bottom sides of the test base plate 1 with the two pin rods 92, the test base plate 1 cannot rotate, thus keeping the basin insulator 4 in a concave cavity facing downward, ensuring test stability. Conversely, after the test is completed, the pin rod 92 is moved away from the sliding surface, and the test base plate 1 can rotate, making it convenient to use.

[0027] Working principle: When installing the pot-type insulator 4 to be tested, first rotate the test base plate 1 to a horizontal position, and position the water injection pipe 6 downwards. Place the pot-type insulator 4 on the top surface of the test base plate 1, with the cavity of the pot-type insulator 4 facing downwards towards the test base plate 1. Then, fit the equalizing flange 5 onto the pot-type insulator 4 and press it onto the flange of the pot-type insulator 4. Finally, connect and fix the equalizing flange 5, the flange of the pot-type insulator 4, and the test base plate 1 with bolts to achieve the fixed installation of the pot-type insulator 4.

[0028] During the water filling stage, the test base plate 1 is rotated 180° by the servo motor 10 so that the concave cavity of the basin insulator 4 faces upward. The switch valves of the water filling pipe 6 and the discharge pipe 8 are opened, and water is injected into the concave cavity through the water filling pipe 6. Air is discharged from the discharge pipe 8. When water comes out of the discharge pipe 8, it means that the water is full. Then the switch valves of the water filling pipe 6 and the discharge pipe 8 are closed.

[0029] During the hydrostatic test, the test base plate 1 is rotated 180° again by the servo motor 10, so that the concave cavity of the basin insulator 4 faces downward to simulate the actual stress state. The state of the basin insulator 4 is locked by the limit mechanism. The pressurizing pipe 7 is connected to the pressurizing equipment, and the switch valve of the pressurizing pipe 7 is opened to conduct the hydrostatic test by pressurizing the equipment. After the hydrostatic test is completed, the water is drained through the drain pipe 8, and the equalizing flange 5 and the basin insulator 4 can be removed.

[0030] 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 rotating hydrostatic testing fixture for epoxy cast basin insulators, characterized in that: It includes a support frame (2) and a test base plate (1). The test base plate (1) is rotatably connected to the support frame (2) through a horizontal rotating shaft (3). The basin insulator (4) is detachably fixed to the test base plate (1). The test base plate (1) is provided with a water injection pipe (6), a discharge pipe (8) and a pressurization pipe (7) that communicate with the cavity of the basin insulator (4). Switch valves are installed on the water injection pipe (6), the discharge pipe (8) and the pressurization pipe (7).

2. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 1, characterized in that: It also includes a pressure equalization flange (5), which is arranged opposite to the test base plate (1) and connected by bolts. The flange of the basin insulator (4) is fixed between the test base plate (1) and the pressure equalization flange (5) by bolts.

3. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 1, characterized in that: The support frame (2) includes a base (21) and two support platforms (22) fixed on the base (21). The two support platforms (22) are arranged opposite to each other, and each support platform (22) is fixed with a bearing seat (23). Two rotating shafts (3) are fixed opposite to each other on the side wall of the test base plate (1). The two rotating shafts (3) are rotatably connected to the two bearing seats (23) respectively.

4. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 3, characterized in that: The support frame (2) is provided with a limiting mechanism, which locks and fixes the basin insulator (4) when the cavity faces downward.

5. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 4, characterized in that: The limiting mechanism includes two pin-type limiting pins (9), which are respectively installed on two support platforms (22) and located on both sides of the line connecting the two bearing seats (23). When the concave cavity of the basin insulator (4) faces downward, the pin-type limiting pins (9) can be supported on the bottom surface of the test base plate (1).

6. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 1, characterized in that: A handle (11) is fixed to the side wall of the test base plate (1).

7. The epoxy cast-in-place pot-type insulator rotary hydrostatic test fixture according to claim 1, characterized in that: The support frame (2) is equipped with a drive mechanism that drives the test base plate (1) to flip.

Images