Internal water pressure testing machine for disc-shaped suspension type porcelain insulator

Abstract

The utility model discloses a water pressure testing machine in a disc-shaped suspension type porcelain insulator, and belongs to the technical field of porcelain insulator testing. The internal water pressure testing machine for the disc-shaped suspension type porcelain insulator comprises a rack, wherein a lifting driving device and a telescopic rod are fixed on the rack; the telescopic rod is in transmission connection with the lifting driving device; a pressurizing protective cover is arranged at the tail end of the telescopic rod; the pressurization execution device is provided with an oil cylinder and a pressurization water pipe; the oil cylinder is fixedly connected with the rack, and the pressurizing water pipe penetrates through the oil cylinder and is driven by the oil cylinder to move up and down; the pressurizing water pipe penetrates through the pressurizing protective cover, and a rubber composite pressure head with a water outlet is arranged at the extending tail end of the pressurizing water pipe and is used for sealing the head cavity of the porcelain insulator; a plurality of springs are arranged in the rubber composite pressure head; the pressurized water system is butted with the pressurized water pipe through a water conveying pipeline; the insulator transplanting device is provided with a feeding station and a testing station; at least one of the feeding station and the testing station is provided with an insulator supporting seat. The internal hydrostatic test device can be used for the internal hydrostatic test of the suspension type porcelain insulator in an ultrahigh-voltage power transmission and transformation line.

Description

Technical Field

[0001] This utility model relates to a technology in the field of porcelain insulator testing, specifically a disc-type suspension porcelain insulator internal water pressure testing machine. Background Technology

[0002] Disc-type suspension porcelain insulators must undergo rigorous quality testing before leaving the factory to ensure their reliability and safety in the power system.

[0003] The internal water pressure test is an important routine test for inspecting the quality of disc suspension porcelain insulators. This test uses water as a medium to pressurize the cavity at the head of the porcelain insulator. When various harmful defects exist inside the porcelain component, such as iron spots, air bubbles, or delamination, or when there are micro-cracks on the surface, the porcelain component will be destroyed under water pressure and thus rejected. This test ensures that the insulators that pass the test meet the design requirements and guarantee product reliability.

[0004] With the increase in voltage and capacitance of transmission and transformation lines, more stringent requirements are placed on the reliability of suspension porcelain insulators used in ultra-high voltage transmission and transformation lines, thus placing higher demands on internal hydrostatic testing equipment. Current internal hydrostatic testing equipment struggles to meet the requirements for sealing performance under higher test pressures.

[0005] In order to solve the above-mentioned problems existing in the prior art, this utility model is thus developed. Utility Model Content

[0006] To address the aforementioned shortcomings of existing technologies, this invention proposes a disc-type suspension porcelain insulator internal water pressure testing machine, which can be used for internal water pressure testing of disc-type suspension porcelain insulators in ultra-high voltage transmission and transformation lines.

[0007] This utility model relates to a disc-shaped suspension porcelain insulator internal water pressure testing machine, comprising:

[0008] The frame is fixed with a lifting drive device and a telescopic rod; the telescopic rod is connected to the lifting drive device, and a pressure protection cover is provided at the end of the telescopic rod.

[0009] The pressurization actuator is equipped with a hydraulic cylinder and a pressurization water pipe. The hydraulic cylinder is fixedly connected to the frame, and the pressurization water pipe passes through the hydraulic cylinder and is driven to move up and down by the hydraulic cylinder. The pressurization water pipe passes through the pressurization protective cover and has a rubber composite pressure head with a water outlet at the extended end for sealing the cavity of the porcelain insulator head. The rubber composite pressure head is equipped with several springs.

[0010] The pressurized water system is connected to the pressurized water pipe via a water supply pipeline.

[0011] The insulator transplanting device is equipped with a loading station and a testing station; at least one of the loading station and the testing station is equipped with an insulator support.

[0012] In some specific implementation schemes, the lifting drive device includes a drive motor and a pneumatic pump that is connected to the drive motor; the telescopic rods are preferably four in number and distributed around the cylinder.

[0013] In some specific implementation schemes, the water supply pipeline is equipped with a pressure gauge to monitor the water supply pressure.

[0014] In some specific implementation schemes, the pressure head is equipped with a pressure sensor to monitor the applied pressure.

[0015] In some specific implementation schemes, a support bucket is also provided, with an opening at the bottom, to accommodate the insulator support base and the insulator at the testing station. Preferably, corresponding to the support bucket, the insulator transplanting device is also provided with a lifting mechanism at the testing station.

[0016] For some specific implementation schemes, the insulator transplanting device adopts a linear guide rail module or a rotary cylinder module.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] 1) The spring forms the elastic skeleton of the rubber composite indenter. After one test, the spring unloads and rebounds, causing the rubber to rebound quickly, enabling fast-paced and high-frequency testing, which improves the efficiency of the internal water pressure test; it avoids fatigue problems of the pure rubber indenter under this condition, which would lead to seal failure and affect the results of the internal water pressure test.

[0019] 2) The spring-loaded rubber composite pressure head has reliable sealing performance and can adapt to internal water pressure tests of different pressures. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Example 1;

[0021] Figure 2 This is a schematic diagram of the pressure head and sealing gasket in Example 1;

[0022] In the diagram: 1. Frame; 2. Pressurized water pipe; 3. Telescopic rod; 4. Hydraulic cylinder; 5. Rubber composite pressure head; 6. Pressurized protective cover; 7. Water supply pipeline; 8. Pressurized water system; 9. Bucket; 10. Insulator support seat; 11. Insulator transplanting device; 12. Lifting mechanism; 501. Spring; 502. Rubber composite pressure head body; 600. Insulator. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, this embodiment includes:

[0026] The frame 1 is fixed with a lifting drive device (not shown in the attached figure) and a telescopic rod 3; the telescopic rod 3 is connected to the lifting drive device in a transmission manner, and a pressure protective cover 6 is provided at the end of the telescopic rod 3;

[0027] The pressurization actuator is equipped with a hydraulic cylinder 4 and a pressurization water pipe 2. The hydraulic cylinder 4 is fixedly connected to the frame 1, and the pressurization water pipe 2 passes through the hydraulic cylinder 4 and is driven to move up and down by the hydraulic cylinder 4. The pressurization water pipe 2 passes through the pressurization protective cover 6 and has a rubber composite pressure head 5 with a water outlet at the extended end.

[0028] The pressurized water system 8 is connected to the pressurized water pipe 2 via the water supply pipe 7;

[0029] The insulator transplanting device 11 is provided with a loading station and a testing station; at least one of the loading station and the testing station is provided with an insulator support seat 10, which serves as a tooling fixture for testing the internal water pressure of the insulator; when only one insulator support seat 10 is provided, the testing efficiency is low; when insulator support seats 10 are provided at both the loading station and the testing station, the testing efficiency is improved; a lifting mechanism 12 is also provided at the testing station for lifting the insulator support seat 10.

[0030] like Figure 2 As shown, the rubber composite pressure head 5 is generally a flat columnar structure and is sleeved on the end of the pressurized water pipe 2. Several springs 501 are pre-embedded in the rubber composite pressure head 5, for example, four springs. The four springs are evenly distributed in the circumference of the rubber composite pressure head. Each spring has a semi-circular metal part at both ends of the axial direction. The semi-circular metal part is embedded in the rubber composite pressure head body 502 to increase the contact area between the spring end face and the rubber composite pressure head body.

[0031] The lifting drive device is equipped with a drive motor and a pneumatic pump that is connected to the drive motor; the corresponding telescopic rods are pneumatic rods, preferably four in number, evenly distributed around the oil cylinder.

[0032] The water supply pipeline 7 is equipped with a pressure gauge for monitoring the water supply pressure.

[0033] The rubber composite pressure head 5 is also equipped with a pressure sensor for monitoring the applied pressure.

[0034] This embodiment also includes a support bucket 9 with an opening at the bottom, which houses the insulator support seat 10 and the insulator at the test station. The support bucket 9, combined with the pressure protection cover 6, can better protect the equipment and personnel during the test and avoid potential damage to equipment and personnel during the breakage of defective insulators.

[0035] The insulator transplanting device 11 can be a linear guide rail module or a rotary cylinder module.

[0036] This embodiment also includes a PLC controller for adjusting various test parameters.

[0037] In this embodiment, during operation, the hydraulic cylinder 4 drives the pressurized water pipe 2 to lower the rubber composite pressure head 5 until the rubber composite pressure head 5 presses the insulator 600. After pressing, the pressurized water system 8 injects test water into the internal cavity of the insulator through the water supply pipe 7 and the pressurized water pipe 2, and gradually pressurizes it to the preset pressure to complete the test.

[0038] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A disc-shaped suspension porcelain insulator internal water pressure testing machine, characterized in that, include: The frame is fixed with a lifting drive device and a telescopic rod; the telescopic rod is connected to the lifting drive device, and a pressure protection cover is provided at the end of the telescopic rod. The pressurization actuator is equipped with a hydraulic cylinder and a pressurization water pipe. The hydraulic cylinder is fixedly connected to the frame, and the pressurization water pipe passes through the hydraulic cylinder and is driven to move up and down by the hydraulic cylinder. The pressurization water pipe passes through the pressurization protective cover and has a rubber composite pressure head with a water outlet at the extended end for sealing the cavity of the porcelain insulator head. The rubber composite pressure head is equipped with several springs. The pressurized water system is connected to the pressurized water pipe via a water supply pipeline. The insulator transplanting device is equipped with a loading station and a testing station; at least one of the loading station and the testing station is equipped with an insulator support.

2. The disc-type suspension porcelain insulator internal water pressure testing machine according to claim 1, characterized in that, The lifting drive device is equipped with a drive motor and a pneumatic pump that is connected to the drive motor.

3. The disc-shaped suspension porcelain insulator internal water pressure testing machine according to claim 1, characterized in that, The water supply pipeline is equipped with a pressure gauge to monitor the water supply pressure.

4. The disc-type suspension porcelain insulator internal water pressure testing machine according to claim 1, characterized in that, The pressure head is equipped with a pressure sensor for monitoring the applied pressure.

5. The disc-type suspension porcelain insulator internal water pressure testing machine according to claim 1, characterized in that, It is also equipped with a support bucket, with an opening at the bottom, to accommodate the insulator support base and the insulator at the test station.

6. The disc-type suspension porcelain insulator internal water pressure testing machine according to claim 5, characterized in that, Corresponding to the support bucket, the insulator transplanting device is also equipped with a lifting mechanism at the test station.

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