Water boiling test device for lightning arrester

Abstract

The invention relates to the technical field of test equipment, in particular to a water boiling test device for a lightning arrester, which comprises a test box, a heat insulation layer is arranged in the test box, a gas collection shell is arranged in the heat insulation layer of the test box, an exhaust pipe is arranged in the gas collection shell, and an air pump is arranged in the test box. During operation of the air pump, air in the upper area in the test box can be extracted through the exhaust pipe, so that steam generated by hot water enters the exhaust pipe and then enters the cleaning brush through the exhaust pipe, the temperature of the steam is close to that of the hot water in the test box, and the cleaning brush is arranged between the exhaust pipe and the exhaust pipe. Therefore, the lightning arrester can be prevented from generating thermal stress due to shock cooling, meanwhile, even though the steam can take away obviously visible water drops, the problem that the steam is easy to scald the skin of an operator is further solved as the steam is continuously pumped away by the exhaust pipe above.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a water boiling test device for surge arresters. Background Technology

[0002] The core function of the surge arrester water boiling test is to verify the product's sealing performance and insulation reliability under wet conditions, and to prevent moisture failure during operation. It can not only test the integrity of the seal to prevent rainwater and moisture from penetrating into the internal metal parts or insulation materials, but also assess the wet insulation capability and simulate the actual rain environment to verify whether the insulation performance meets the operating requirements.

[0003] In conventional surge arrester boiling tests, to ensure accuracy, the surge arrester is typically removed and disassembled quickly after boiling. However, when opening the test equipment, due to the pervasive steam and high temperature, it is often necessary to use supports to remove the metal mesh frame containing the surge arrester placed inside the boiling equipment. However, according to the sealing performance test section (Article 8.8) of the Chinese national standard GB / T 11032-2020 "AC Gapless Metal Oxide Surge Arresters," the requirement for the boiling test is (8.8.3): After immersing the surge arrester in boiling deionized water (containing 1 kg / m³ of NaCl) for 42 hours, it should be removed and immediately wiped with a dry, clean, and soft cloth to remove all visible moisture, followed by sealing performance checks and electrical tests. Therefore, this clause clearly requires that the surge arrester be wiped immediately upon removal from the boiling water after the 42-hour boiling period.

[0004] As can be seen from the above, the surge arrester needs to be removed and dried immediately after boiling. However, in reality, when the water boiling test chamber is opened after boiling, a large amount of steam will be released. This steam can burn the operator's skin. At the same time, the surge arrester itself is also in a high-temperature state. Natural cooling or water cooling is usually used, but this has drawbacks. During natural cooling, dust, oil and other impurities in the air can easily adhere to the surface of the surge arrester, interfering with the sealing performance test or insulation test results, which may lead to misjudgment of the equipment status. In addition, natural cooling takes a long time, which will prolong the overall test process. When using cold water cooling, the large temperature difference can easily generate thermal stress, which may cause the porcelain sleeve to crack and the seals to age and fail, affecting the accuracy of subsequent equipment testing. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a water-boiling test device for surge arresters.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a surge arrester water boiling test device, comprising a test chamber, an insulation layer inside the test chamber, a gas collecting shell inside the insulation layer, an exhaust pipe inside the gas collecting shell, an exhaust pipe at the bottom of the test chamber, an air pump inside the test chamber, a cleaning brush between the exhaust pipe and the exhaust pipe, and an inclined exhaust port on the inner side of the cleaning brush; The test chamber is equipped with a load-bearing frame inside. A turbine is installed on the inner top surface of the cleaning brush.

[0007] Preferably, an equipment compartment is provided on one side of the test chamber, the air pump is located inside the equipment compartment, one end of the air extraction pipe and the air exhaust pipe both penetrate into the equipment compartment, and the air extraction pipe and the air exhaust pipe are connected to the air pump's air extraction port and air inlet through an external flexible hose.

[0008] Preferably, a connecting seat is fixedly installed on the outer surface of the exhaust pipe, the connecting seat is fixed to the inner bottom wall of the test chamber, the exhaust pipe is fixed in position between the connecting seats and is connected to a bearing pipe, a one-way valve is installed inside the bearing pipe, and a heating rod is installed on the inner side wall of the test chamber between the exhaust pipes.

[0009] Preferably, the outer surface of the gas collecting shell is in close contact with a support mesh, the inner wall of the support mesh is rotatably connected to the outer surface of the cleaning brush, the bottom end of the cleaning brush is rotatably connected to a rotating ring, the bottom end of the rotating ring is fixedly installed with a funnel-shaped exhaust nozzle, the outer surface of the exhaust nozzle is in close contact with a connecting pipe, the inner wall of the connecting pipe is fixedly installed with a rubber ring, the rubber ring and the exhaust nozzle are pressed against each other, and the connecting pipe is provided with a corrugated pipe above the support pipe.

[0010] Preferably, the bottom end of the connecting pipe is connected to the top end of the corrugated pipe, and the bottom end of the corrugated pipe is connected to the top end of the bearing pipe.

[0011] Preferably, a fixing seat is fixedly installed on the inner sidewall of the heat insulation layer, a sliding rod is fixedly installed on the outer surface of the fixing seat, a sliding plate is slidably connected to the outer surface of the sliding rod, a spring is sleeved on the outer surface of the sliding rod, the top end of the spring is fixedly connected to the bottom surface of the sliding plate, and the bottom end of the spring is fixedly connected to the outer surface of the fixing seat.

[0012] Preferably, the outer surface of the slide plate is fixedly connected to the outer surface of the load-bearing frame, the inner wall of the load-bearing frame is fixedly connected to the outer surface of the connecting pipe, and a contact frame is fixedly installed on the bottom surface of the load-bearing net, with the outer surface of the contact frame in close contact with the outer surface of the load-bearing frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention utilizes the coordination between a suction pipe, an exhaust pipe, an air pump, a cleaning brush, and an exhaust port. During air pump operation, air is drawn from the upper area of ​​the test chamber through the suction pipe, allowing steam generated by hot water to enter the suction pipe and then through the exhaust pipe into the cleaning brush. Because the exhaust port is angled, the steam discharges through the exhaust port, causing the cleaning brush to rotate. As the brush rotates, its PVC bristles continuously and lightly brush the surface of the surge arrester, causing larger water droplets on the arrester's surface to be knocked away. Simultaneously, due to… The blowing of hot steam causes the water droplets on the surface of the surge arrester to evaporate. The steam originates from the hot water inside the insulation layer, so the temperature of the steam is close to that of the hot water in the test chamber. This prevents the surge arrester from developing thermal stress due to sudden cooling, avoiding cracking or accelerated aging of the porcelain sleeve and seals. Although the steam can remove the visible water droplets, it also maintains the surface humidity of the surge arrester, preventing fluctuations in insulation performance caused by rapid evaporation of moisture, ensuring stable and reliable test data. Furthermore, since the steam is continuously drawn away by the exhaust pipe above, the problem of steam easily burning the operator's skin is further solved. 2. This invention utilizes the cooperation between the rubber ring, vent, spring, slide plate, slide rod, and support net. When the support net presses down on the load-bearing frame, the load-bearing frame can slide on the surface of the slide rod. Although the spring cannot fully bear the load, it can provide cushioning when the load-bearing frame moves down. This makes the vent more flexible when it squeezes into the rubber ring, avoiding excessive impact from the vent and preventing cracks in the rubber ring, thus further increasing the service life of the rubber ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a surge arrester water boiling test device according to the present invention; Figure 2 This is a schematic diagram showing the equipment compartment layout of the surge arrester water boiling test device of the present invention; Figure 3 This is a schematic diagram of the structure of a surge arrester water boiling test device after the door is opened according to the present invention; Figure 4 This is a schematic diagram of the structure of the surge arrester water boiling test device of the present invention after the contact frame is removed and the device is moved out of the test chamber; Figure 5 This is a schematic diagram of the exploded structure of the test chamber of the surge arrester water boiling test device of the present invention; Figure 6 This is a schematic diagram of the pipeline distribution structure of a surge arrester water boiling test device according to the present invention; Figure 7 This is a schematic diagram of the interconnection between the support frame and the support network of the surge arrester water boiling test device according to the present invention; Figure 8 This is a schematic diagram of the structure between the cleaning brush and the bearing tube of the surge arrester water boiling test device of the present invention; Figure 9 This is a schematic diagram showing the tilted exhaust port inside the cleaning brush of a surge arrester water boiling test device according to the present invention.

[0015] The components represented by each number in the attached diagram are listed below: 1. Test chamber; 2. Insulation layer; 3. Gas collection shell; 4. Extraction pipe; 5. Exhaust pipe; 6. Air pump; 7. Cleaning brush; 8. Exhaust port; 9. Support frame; 10. Equipment compartment; 11. Connecting seat; 12. Support pipe; 13. Heating rod; 14. Support net; 15. Rotating ring; 16. Exhaust nozzle; 17. Connecting pipe; 18. Rubber ring; 19. Corrugated pipe; 20. Fixing seat; 21. Slide rod; 22. Slide plate; 23. Spring; 24. Contact frame; 25. Turbine. Detailed Implementation

[0016] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] like Figures 1-9The device shown is a surge arrester water boiling test apparatus, comprising a test chamber 1, an insulation layer 2 inside the test chamber 1, a gas collecting shell 3 inside the insulation layer 2, an extraction pipe 4 inside the gas collecting shell 3, an exhaust pipe 5 at the bottom of the test chamber 1, an air pump 6 inside the test chamber 1, and a cleaning brush 7 between the exhaust pipe 5 and the extraction pipe 4. The cleaning brush 7 has an inclined exhaust port 8 on its inner side, and a turbine 25 is installed on the inner top surface of the cleaning brush 7. After the boiling time reaches the specified standard, drainage is initiated. During drainage, the air pump 6 starts operating. During operation, the air pump 6 draws air from the upper area inside the test chamber 1 through the extraction pipe 4, allowing steam generated by the hot water to enter the extraction pipe 4 and then through the exhaust pipe 5 into the cleaning brush 7. Because the exhaust port 8 is inclined, and the gas flow drives the turbine 25 to rotate, steam is released through the exhaust port 8. The cleaning brush 7 can rotate, and when the cleaning brush 7 rotates, the PVC bristles on its surface can continuously and slightly rub the surface of the surge arrester, causing larger water droplets on the surface of the surge arrester to be knocked away by the bristles. At the same time, due to the blowing of hot steam, the water droplets on the surface of the surge arrester begin to evaporate. The source of the steam is the hot water originally generated in the insulation layer 2, so the temperature of the steam is close to the temperature of the hot water in the test chamber 1. Therefore, it can prevent the surge arrester from generating thermal stress due to sudden cooling, and avoid cracking or accelerated aging of the porcelain sleeve and seals. Although the steam can remove the visible water droplets, it can also maintain the humidity of the surface of the surge arrester, avoiding the fluctuation of insulation performance caused by rapid evaporation of moisture, ensuring stable and reliable test data. Furthermore, since the steam is continuously drawn away by the exhaust pipe 4 above, the problem of steam easily burning the operator's skin is further solved.

[0018] The test chamber 1 has an equipment compartment 10 on one side. The air pump 6 is located inside the equipment compartment 10. One end of the suction pipe 4 and the exhaust pipe 5 both penetrate into the equipment compartment 10. The suction pipe 4 and the exhaust pipe 5 are connected to the suction port and the inlet port of the air pump 6 through an external hose. The air pump 6 is a peristaltic pump, and it must be a peristaltic pump. The peristaltic pump can make the gas in the suction pipe 4 quickly enter the exhaust pipe 5 by squeezing the hose. Since it is a peristaltic pump, it drives the gas flow by squeezing the hose. Therefore, even if liquid enters the suction pipe 4, it will not affect the air pump 6.

[0019] A connecting seat 11 is fixedly installed on the outer surface of the exhaust pipe 5. The connecting seat 11 is fixed to the inner bottom wall of the test chamber 1. The exhaust pipe 5 is fixed between the connecting seat 11 and the connecting seat 11 and is connected to the bearing pipe 12. A one-way valve is installed inside the bearing pipe 12. A heating rod 13 is installed on the inner side wall of the test chamber 1 between the exhaust pipe 5 and the exhaust pipe 5. The connecting seat 11 can provide load-bearing for the exhaust pipe 5. The exhaust pipe 5 is made of copper and is relatively thin. Therefore, even if the gas temperature drops after passing through the suction pipe 4 and the air pump 6, it can still absorb a certain amount of heat when passing through the exhaust pipe 5, so that the temperature of the discharged gas is as close as possible to the temperature of the hot water in the test chamber 1.

[0020] The outer surface of the air collecting shell 3 is in close contact with the support net 14. The inner wall of the support net 14 is rotatably connected to the outer surface of the cleaning brush 7. A rotating ring 15 is rotatably connected to the bottom end of the cleaning brush 7. A funnel-shaped exhaust nozzle 16 is fixedly installed at the bottom end of the rotating ring 15. The outer surface of the exhaust nozzle 16 is in close contact with the connecting pipe 17. A rubber ring 18 is fixedly installed on the inner wall of the connecting pipe 17. The rubber ring 18 and the exhaust nozzle 16 are pressed against each other. A corrugated pipe 19 is provided above the support pipe 12 on the connecting pipe 17. The support net 14 can be directly hung. Before testing, the surge arrester can be vertically fixed on the support net 14 on the gas collecting shell 3. Then, the support net 14 is hung on the gas collecting shell 3. While the support net 14 is hanging on the gas collecting shell 3, the exhaust nozzle 16 at the bottom of the cleaning brush 7 can be squeezed into the rubber ring 18, so that the inside of the cleaning brush 7 is connected to the inside of the connecting pipe 17, allowing the gas in the exhaust pipe 5 to enter the inside of the cleaning brush 7. Before the exhaust nozzle 16 is squeezed into the rubber ring 18, the rubber ring 18 can block the inside of the connecting pipe 17 to prevent backflow.

[0021] The bottom end of the connecting pipe 17 is connected to the top end of the corrugated pipe 19, and the bottom end of the corrugated pipe 19 is connected to the top end of the bearing pipe 12. The corrugated pipe 19 enables the connecting pipe 17 to be connected to the bearing pipe 12 that connects to the exhaust pipe 5.

[0022] The test chamber 1 is equipped with a load-bearing frame 9. The outer surface of the slide plate 22 is fixedly connected to the outer surface of the load-bearing frame 9. The inner wall of the load-bearing frame 9 is fixedly connected to the outer surface of the connecting pipe 17. The bottom surface of the load-bearing net 14 is fixedly installed with a contact frame 24. The outer surface of the contact frame 24 is in close contact with the outer surface of the load-bearing frame 9. When the load-bearing net 14 carrying the surge arrester is placed into the test chamber 1, it can drive the contact frame 24 to press down on the load-bearing frame 9, so that the load-bearing frame 9 can provide load for the load-bearing net 14 and the surge arrester.

[0023] A fixing seat 20 is fixedly installed on the inner wall of the insulation layer 2. A sliding rod 21 is fixedly installed on the outer surface of the fixing seat 20. A sliding plate 22 is slidably connected to the outer surface of the sliding rod 21. A spring 23 is sleeved on the outer surface of the sliding rod 21. The top end of the spring 23 is fixedly connected to the bottom surface of the sliding plate 22, and the bottom end of the spring 23 is fixedly connected to the outer surface of the fixing seat 20. When the bearing net 14 presses down on the load-bearing frame 9, the load-bearing frame 9 can slide on the surface of the sliding rod 21. Although the spring 23 cannot fully bear the load, it can provide a buffer when the load-bearing frame 9 moves down, making the exhaust nozzle 16 more flexible when it squeezes into the rubber ring 18. This avoids excessive impact from the exhaust nozzle 16, which could cause cracks in the rubber ring 18, and further increases the service life of the rubber ring 18.

[0024] It should be noted that a drain valve is installed at the bottom of test chamber 1.

[0025] After the surge arrester is vertically installed on the support net 14, the support net 14 is hung on the gas collecting shell 3. While the support net 14 is hanging on the gas collecting shell 3, the support net 14 can drive the exhaust nozzle 16 to be inserted into the rubber ring 18 in the connecting pipe 17. As the support net 14 moves down, it drives the load-bearing frame to move down, and the spring 23 can provide cushioning for its movement. After placement, water can be added to the test chamber 1. When the water completely and fully submerges the surge arrester, the test chamber 1 can be closed, and the heating rod 13 can be used to heat it to conduct a normal water boiling test on the surge arrester. After the water boiling test is completed, the drain valve at the bottom of the test chamber 1 starts to drain water, and at the same time, the air pump 6 starts. The air pump 6 can draw steam from the upper part of the test chamber 1 through the air extraction pipe 4 and inject it into the cleaning brush 7 through the exhaust pipe 5. The steam can be discharged through the inclined exhaust port 8, causing the cleaning brush 7 to rotate and clean the water stains on the surface of the surge arrester. The steam can also dry the moisture on the surface of the surge arrester and maintain the humidity of the surface of the surge arrester.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surge arrester water boiling test apparatus, comprising a test chamber (1), characterized in that: The test chamber (1) is provided with a heat insulation layer (2) inside. The test chamber (1) is provided with a gas collection shell (3) inside the heat insulation layer (2). The gas collection shell (3) is provided with a suction pipe (4) inside. The test chamber (1) is provided with an exhaust pipe (5) at the bottom inside. The test chamber (1) is provided with an air pump (6) inside. A cleaning brush (7) is provided between the exhaust pipe (5) and the suction pipe (4). An inclined exhaust port (8) is opened on the inner side of the cleaning brush (7). The test chamber (1) is equipped with a load-bearing frame (9). A turbine (25) is installed on the inner top surface of the cleaning brush (7).

2. The surge arrester water boiling test apparatus according to claim 1, characterized in that: The test chamber (1) has an equipment compartment (10) on one side. The air pump (6) is located inside the equipment compartment (10). One end of the air extraction pipe (4) and the exhaust pipe (5) both penetrate into the equipment compartment (10). The air extraction pipe (4) and the exhaust pipe (5) are connected to the air extraction port and the air inlet of the air pump (6) through an external hose.

3. The surge arrester water boiling test apparatus according to claim 2, characterized in that: A connecting seat (11) is fixedly installed on the outer surface of the exhaust pipe (5). The connecting seat (11) is fixed to the inner bottom wall of the test chamber (1). The exhaust pipe (5) is fixed in position between the connecting seat (11) and the connecting seat (11) and is connected to a bearing pipe (12). A one-way valve is installed inside the bearing pipe (12). A heating rod (13) is installed on the inner side wall of the test chamber (1) between the exhaust pipe (5) and the exhaust pipe (5).

4. The surge arrester water boiling test apparatus according to claim 1, characterized in that: The outer surface of the gas collecting shell (3) is in close contact with the support mesh (14). The inner wall of the support mesh (14) is rotatably connected to the outer surface of the cleaning brush (7). The bottom end of the cleaning brush (7) is rotatably connected to a rotating ring (15). The bottom end of the rotating ring (15) is fixedly installed with a funnel-shaped exhaust nozzle (16). The outer surface of the exhaust nozzle (16) is in close contact with a connecting pipe (17). The inner wall of the connecting pipe (17) is fixedly installed with a rubber ring (18). The rubber ring (18) and the exhaust nozzle (16) are pressed against each other. The connecting pipe (17) is provided with a corrugated pipe (19) above the support pipe (12).

5. The surge arrester water boiling test apparatus according to claim 4, characterized in that: The bottom end of the connecting pipe (17) is connected to the top end of the corrugated pipe (19), and the bottom end of the corrugated pipe (19) is connected to the top end of the bearing pipe (12).

6. The surge arrester water boiling test apparatus according to claim 1, characterized in that: A fixing seat (20) is fixedly installed on the inner side wall of the heat insulation layer (2). A slide rod (21) is fixedly installed on the outer surface of the fixing seat (20). A slide plate (22) is slidably connected to the outer surface of the slide rod (21). A spring (23) is sleeved on the outer surface of the slide rod (21). The top end of the spring (23) is fixedly connected to the bottom surface of the slide plate (22), and the bottom end of the spring (23) is fixedly connected to the outer surface of the fixing seat (20).

7. The surge arrester water boiling test apparatus according to claim 4, characterized in that: The outer surface of the slide plate (22) is fixedly connected to the outer surface of the load-bearing frame (9), the inner wall of the load-bearing frame (9) is fixedly connected to the outer surface of the connecting pipe (17), and a contact frame (24) is fixedly installed on the bottom surface of the load-bearing net (14). The outer surface of the contact frame (24) is in close contact with the outer surface of the load-bearing frame (9).

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