A 500kV zinc oxide arrester leakage current non-climbing test device
By designing a climb-free test device for 500kV zinc oxide arrester, the device uses magnetic adsorption and expansion of insulating rods to achieve 90° angle connection between the high-voltage test line and the lightning arrester, solving the problem of high-altitude operation and inclusion angles that require existing wiring methods, and improving test safety and efficiency.
Patent Information
- Application Number
- CN201911002712.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-21
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2039-10-21
AI Technical Summary
During the leakage current test of the 500kV zinc oxide lightning arrester, the existing wiring method requires the use of a high-altitude working vehicle to climb up, which poses safety risks and is difficult to ensure that the angle between the high-voltage test line and the lightning arrester is 90°, resulting in the test data often exceeding the standard.
A 500kV zinc oxide lightning arrester leakage current without climbing test device is designed. The device uses insulating hooks, strong magnets, insulated support rods, stainless steel frames, guide grooves, insulated rods, insulated ropes, high-voltage test lines, DC generators and generator controllers to achieve a 90° angle connection between the high-voltage test lines and the lightning arrester through magnetic adsorption and expansion of the insulated rod, avoiding high-altitude operations.
This device allows testers to avoid using aerial work vehicles, avoiding the risk of personnel falling high, and effectively avoiding the wasted time of repeated wiring caused by insufficient angle of pressurized line, improving the test efficiency.
Smart Images
Figure CN110726954B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electrical measurement, in particular to a 500kV zinc oxide arrester leakage current non-climbing test device. Background Art
[0002] 500kV lightning arrester is one of the important electrical equipment in the power system. When the power grid has lightning overvoltage or operation overvoltage, it plays a very important role in the safe operation of the power system. In order to ensure the safe and reliable operation of the lightning arrester in the power system, it is necessary to carry out preventive tests on the lightning arrester, among which the most important is the power outage measurement of DC reference voltage and the leakage current test at 0.75 times the DC reference voltage.
[0003] During the on-site test, since an aerial work vehicle needs to be used to climb to a height each time the test line is replaced, in order to ensure the accuracy of the data, the test line should maintain a 90° angle with the lightning arrester, and there is no special test wiring tool to make the angle between the pressurized line and the lightning arrester casing be 90°, which does not meet the test wiring requirements. In addition, due to the influence of factors such as inductive electricity, grading rings, and the position of the ground wire installed on the conductor, the on-site testing of the lightning arrester DC reference voltage and the leakage current at 0.75 times the DC reference voltage often results in test data exceeding the standard. Summary of the invention
[0004] In view of the shortcomings of the existing wiring methods, the present invention provides a 500kV zinc oxide arrester leakage current non-climbing test device, which does not require the use of an aerial work vehicle to climb.
[0005] The invention discloses a 500kV zinc oxide lightning arrester leakage current non-climbing test device, comprising an insulating hook, a strong magnet, an insulating support rod, a stainless steel frame, a guide groove, an insulating rod, an insulating rope, a high-voltage test line, a DC generator and a generator controller. The lower end of the insulating hook is fixedly connected to the strong magnet, the stainless steel frame is adsorbed on the lower end of the strong magnet by magnetism, one end of the insulating support rod is fixed on the insulating hook and is located above the strong magnet, the other end of the insulating support rod is provided with an insulating hole, the upper end of the guide groove is fixed below the stainless steel frame, an upper magnet is fixed in the guide groove, a lower magnet is arranged on the top of the insulating rod, the upper magnet and the lower magnet cooperate with each other by magnetic adsorption, one end of the high-voltage test line is connected to the stainless steel frame, and the other end is connected to the DC generator, the high-voltage test line forms an angle of 90 degrees with the lightning arrester, the DC generator is connected to the generator controller, one end of the insulating rope is connected to the insulating hole, and the other end is connected to the high-voltage test line.
[0006] The stainless steel frame is rectangular.
[0007] The guide groove is a hollow cone.
[0008] The upper magnet and the lower magnet are both round blocks.
[0009] The insulating rod is a telescopic rod.
[0010] The generator controller is a conventional commercially available product, and controls the output voltage of the DC generator by conventional methods.
[0011] When the device is used, one end of the high-voltage test line is clamped to the rectangular stainless steel frame through a clip, and the length of the insulating rope is adjusted according to the height of the insulating hook and the rectangular stainless steel frame. One end of the insulating rope is connected to the insulating hole, and the other end is connected to the high-voltage test line, and the high-voltage test line and the lightning arrester form a 90° test angle; the insulating rod is extended to the height of the lightning arrester grading ring, and the insulating hook is hung on the lightning arrester grading ring through the insulating rod, and the insulating rod is pulled downward to separate the stainless steel frame from the strong magnet, and then the stainless steel frame is put on the upper and lower lightning arrester connecting metal parts, and the insulating rod is pulled downward to separate the upper magnet in the guide groove from the lower magnet on the top of the insulating rod; the high-voltage test line is connected to the DC generator, and the pressure can be started, and the voltage size is controlled by the generator controller.
[0012] Compared with the existing wiring device, the beneficial effects of the present invention are: the test personnel do not need to use an aerial work vehicle, thus avoiding the risk of personnel falling from a height during the test; at the same time, it overcomes the problem that people standing on the ground cannot make the angle between the high-voltage test line and the arrester bushing form a 90° angle by pulling the insulating rope. The use of the present invention can effectively avoid the waste of time caused by repeated wiring due to insufficient angle of the pressurized line, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.
[0014] Figure 1 It is a schematic diagram of the structure of the device of the present invention;
[0015] Figure 2 It is a schematic diagram of the structure of the present invention in use state;
[0016] In the figure: 1-insulating hook; 2-strong magnet; 3-insulating support rod; 4-insulating hole; 5-stainless steel frame; 6-upper magnet; 7-lower magnet; 8-guide groove; 9-insulating rod; 10-lightning arrester equalizing ring; 11-lightning arrester; 12-upper and lower lightning arrester connecting metal parts; 13-insulating rope; 14-high voltage test line; 15-DC generator; 16-test signal connecting line; 17-generator controller. DETAILED DESCRIPTION
[0017] The present invention is further described in detail below by examples;
[0018] Example 1: Figure 1 As shown, the 500kV zinc oxide arrester leakage current non-climbing test device includes an insulating hook 1, a strong magnet 2, an insulating support rod 3, a rectangular stainless steel frame 5, a guide groove 8, a retractable insulating rod 9, an insulating rope 13, a high-voltage test line 14, a DC generator 15, and a generator controller 17. The lower end of the insulating hook 1 is welded on the strong magnet 2, the stainless steel frame 5 is magnetically adsorbed on the lower end of the strong magnet 2, one end of the insulating support rod 3 is welded and fixed on the insulating hook 1 and is located above the strong magnet 2, and the other end of the insulating support rod 3 is provided with an insulating hole 4. The upper end of the guide groove 8 is welded and fixed under the stainless steel frame 5, and the guide groove 8 is a hollow cone; a circular upper magnet 6 is fixed in the guide groove 8, and a circular lower magnet 7 is welded and fixed at the top of the insulating rod 9. The upper magnet 6 and the lower magnet 7 cooperate with each other through magnetic adsorption. One end of the high-voltage test line 14 is connected to the stainless steel frame 5, and the other end is connected to the DC generator 15. The DC generator 15 is connected to the generator controller 17 through the test signal connecting line 16. One end of the insulating rope 13 is connected to the insulating hole 4, and the other end is connected to the high-voltage test line 14.
[0019] The upper magnet 6 and the lower magnet 7 can be effectively attracted and separated before and after the test;
[0020] like Figure 2 As shown, the method steps of the present invention used on site are as follows:
[0021] Step 1: During the test, one end of the high-voltage test line 14 is clamped to the rectangular stainless steel frame 5 through a clip, and the length of the insulating rope 13 is adjusted according to the height of the insulating hook 1 and the rectangular stainless steel frame 5. One end of the insulating rope 13 is connected to the insulating hole, and the other end is connected to the high-voltage test line 14, and the high-voltage test line and the lightning arrester 11 form a test angle of 90°;
[0022] Step 2: Extend the insulating rod 9 to the height of the arrester voltage-equalizing ring, hang the insulating hook 1 on the arrester voltage-equalizing ring 10 through the insulating rod, pull the insulating rod downward to separate the stainless steel frame 5 from the strong magnet 2, and then put the stainless steel frame 5 on the upper and lower arrester connecting metal parts 12, pull the insulating rod downward, so that the upper magnet 6 in the guide groove is separated from the lower magnet 7 on the top of the insulating rod;
[0023] Step 3: Connect the high voltage test line 14 to the DC generator 15, turn on the power, and start pressurizing. The voltage is controlled by the generator controller 17. After the test is completed, dismantle the test equipment.
[0024] The 500kV zinc oxide arrester leakage current non-climbing test device of the present invention utilizes the arrester's own voltage-equalizing ring and metal connecting components, so that the tester does not need to use an aerial work vehicle, thereby avoiding the risk of personnel falling from a height during the test; at the same time, the problem that a person standing on the ground cannot make the angle between the high-voltage test line and the arrester form 90 degrees by pulling an insulating rope can be overcome. The use of the present invention can effectively avoid the waste of time caused by repeated wiring due to insufficient angle of the pressurized line, thereby improving the test efficiency.
[0025] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A 500kV zinc oxide arrester leakage current non-climbing test device, characterized in that: The invention comprises an insulating hook (1), a strong magnet (2), an insulating support rod (3), a stainless steel frame (5), a guide groove (8), an insulating rod (9), an insulating rope (13), a high-voltage test line (14), a DC generator (15), and a generator controller (17). The lower end of the insulating hook (1) is fixedly connected to the strong magnet (2). The stainless steel frame (5) is magnetically adsorbed on the lower end of the strong magnet (2). One end of the insulating support rod (3) is fixed on the insulating hook (1) and is located above the strong magnet (2). The other end of the insulating support rod (3) is provided with an insulating hole (4). The upper end of the guide groove (8) is The device is fixed below the stainless steel frame (5), an upper magnet (6) is fixed in the guide groove (8), a lower magnet (7) is arranged at the top of the insulating rod (9), the upper magnet (6) and the lower magnet (7) cooperate with each other through magnetic adsorption, one end of the high-voltage test line (14) is connected to the stainless steel frame (5), and the other end is connected to the DC generator (15), and the high-voltage test line and the lightning arrester form an angle of 90 degrees; the DC generator (15) is connected to the generator controller (17), and one end of the insulating rope (13) is connected to the insulating hole (4), and the other end is connected to the high-voltage test line (14).
2. The 500kV zinc oxide arrester leakage current non-climbing test device according to claim 1 is characterized in that: The stainless steel frame (5) is rectangular.
3. The 500kV zinc oxide arrester leakage current non-climbing test device according to claim 1 is characterized in that: The guide groove (8) is a hollow cone.
4. The 500kV zinc oxide arrester leakage current non-climbing test device according to claim 1 is characterized in that: The upper magnet (6) and the lower magnet (7) are both round blocks.
5. The 500kV zinc oxide arrester leakage current non-climbing test device according to claim 1 is characterized in that: The insulating rod (9) is a telescopic rod.
6. The 500kV zinc oxide arrester leakage current non-climbing test device according to claim 1 is characterized in that: The high voltage test line (14) is connected to the stainless steel frame (5) via a clip.
Citation Information
Patent Citations
500 kV zinc oxide arrester leakage current climbing-free test device
CN210982698U