A method for repairing leakage of sulfur hexafluoride combined electrical appliances

Abstract

The present invention relates to a method for repairing leakage of sulfur hexafluoride combined electrical appliances, and the steps are as follows: ① Cover the soft belt body of the repairing soft belt at the leakage flange, open the exhaust port of the repairing soft belt, and reduce the gas pressure in the soft belt; fully bond the soft belt wing of the repairing soft belt with the combined electrical appliance body with an adhesive, and wrap and press the soft belt wing with a composite tape; ② After the soft belt wing is completely cured, install the repairing outer sheath, cover the outer sheath wing on the soft belt wing, fully bond the middle with an adhesive, and wrap and press with a composite tape after curing; ③ Pass a capillary through the injection port of the repairing outer sheath, pump resin through the capillary with a pump, and when the resin is almost poured, close the exhaust port of the repairing soft belt, fill the entire outer sheath with resin, close the injection port, and end the repairing. The present invention transmits the pressure of the leakage point to the whole of the soft belt through the repairing soft belt, and ensures that the gas is continuously discharged through the exhaust port during the repairing process, and the plugging pressure is low.

Description

Technical Field

[0001] The invention belongs to the field of sulfur hexafluoride combined electrical appliances, relates to a leakage repairing technology, and in particular to a leakage repairing method for a sulfur hexafluoride combined electrical appliance. Background Art

[0002] With the development of the power industry and the increase in voltage levels, more and more electrical equipment using sulfur hexafluoride as an insulating medium has been put into operation. However, as the operation time becomes longer, the sulfur hexafluoride inflation equipment is operated under pressure for a long time, and leakage failures often occur at connection locations such as flanges. If the leakage is left unchecked, the sulfur hexafluoride pressure in the equipment will decrease, causing the equipment to alarm, lock, or even discharge accidents; if it is only inflated regularly, it will accelerate the leakage of sulfur hexafluoride and cause a large amount of greenhouse gas to escape. However, the current plugging materials and plugging technologies have great limitations. Direct pressure plugging at the leakage point will cause the solidified material at this point to be subject to great gas pressure, which is prone to plugging failure. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a leak repair method to disperse the pressure at the leak point and improve the leak repair success rate and effective life of the leak repair.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A method for repairing leakage of sulfur hexafluoride combined electrical appliances, the steps are as follows:

[0006] ① Cover the leaking flange with the main body of the leak-proof soft tape, open the exhaust port of the leak-proof soft tape, and reduce the gas pressure in the soft tape; fully bond the soft tape wing of the leak-proof soft tape to the main body of the combined electrical appliance with adhesive, and wrap and press the soft tape wing with composite tape;

[0007] ② After the soft belt wing is completely cured, install the leak-proof outer sheath, cover the outer sheath wing on the soft belt wing, and completely bond the middle with adhesive. After curing, wrap and press it with a composite material tape;

[0008] ③ Combine the leak-proof pump and leak-proof gun, connect the leak-proof gun muzzle to the capillary tube, insert the capillary tube from the injection port of the leak-proof outer sheath, pump resin into the capillary tube with a pump, and continuously move the position of the capillary tube during the infusion process. When the resin is almost fully infused, close the exhaust port of the leak-proof soft belt, fill the entire outer sheath with resin, close the injection port, and end the leak-proof.

[0009] Moreover, the leak-proof soft belt comprises a soft belt body, an exhaust port, and a soft belt wing.

[0010] The soft belt body is a dense nylon soft belt;

[0011] The exhaust port is located on a dense nylon soft belt, and the exhaust port is sealed by an exhaust port cap;

[0012] The soft belt wing belts are located on both sides of the soft belt body.

[0013] Moreover, the leak-proof outer sheath comprises an outer sheath body, a glue injection port, fastening bolts, and an outer sheath wing cover.

[0014] The outer sheath body is composed of two half sheaths;

[0015] The fastening bolts are used to connect the two half sets;

[0016] The injection port is the inlet of the resin;

[0017] The outer sheath wing covers are located on both sides of the outer sheath body.

[0018] Moreover, the outer sheath body and the outer sheath wing cover are both made of pressure-resistant hard transparent plastic.

[0019] The advantages and positive effects of the present invention are:

[0020] 1. The present invention can repair the leaking parts of sulfur hexafluoride combined electrical appliances, with a high success rate of repairing the leak, a low probability of leakage again, simple operation and beautiful appearance.

[0021] 2. The present invention transmits the pressure of the leakage point to the surrounding of the soft belt through the leak-proof soft belt. During the leak-proof process, the gas is continuously discharged through the exhaust port, and the leak-proof pressure is low.

[0022] 3. The present invention can repair the leakage of sulfur hexafluoride combination electrical appliances under pressure without power outage, thus ensuring stable operation of the power grid. It is also applicable to various parts prone to leakage, such as flanges, manual controls, insulating basins, and main bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a main schematic diagram of the leak-proof soft belt;

[0024] Figure 2 for Figure 1 Schematic diagram of top view;

[0025] Figure 3 for Figure 1 Schematic diagram of the left side;

[0026] Figure 4 It is a schematic diagram of the main view of the leak-proof outer sheath;

[0027] Figure 5 for Figure 4 Schematic diagram of top view;

[0028] Figure 6 The present invention is a leak repairing flow chart of the method. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0030] A method for repairing leakage of sulfur hexafluoride combined electrical appliances, the steps are as follows:

[0031] ① Cover the leaking flange with a soft sealing tape of the appropriate size, open the exhaust port 2, and reduce the gas pressure in the soft tape; fully bond the soft tape wing 3 to the combined electrical appliance body with adhesive, and wrap and press the soft tape wing 3 with a composite tape to ensure that the gas does not escape from here. Before pasting the soft tape wing 3, the location where the soft tape wing 3 is pasted needs to be polished and rust-free.

[0032] ② After the soft belt wing 3 is completely cured, install the leak-proof outer sheath, cover the outer sheath wing 7 on the soft belt wing 3, and completely bond the middle with adhesive. After curing, wrap and press it with a composite material tape.

[0033] ③ Combine the leak-proof pump and the leak-proof gun, connect the leak-proof gun mouth to the capillary tube, pass the capillary tube through the glue injection port 5 of the leak-proof outer sheath, pump resin into the capillary tube with a pump, and continuously move the position of the capillary tube during the infusion process. When the resin is almost fully infused, close the exhaust port 2 of the leak-proof soft belt, fill the entire outer sheath with resin, close the glue injection port 5, and end the leak-proofing.

[0034] The leak-proof soft tape described in step ① is different from the conventional PTFE tape. Figures 1 to 3 As shown, it includes a soft belt body 1, an exhaust port 2, and a soft belt wing 3.

[0035] The soft belt body 1 is a dense nylon soft belt, and its corresponding size is selected according to the size of the leakage flange.

[0036] The exhaust port 2 is located on the dense nylon soft belt. When the leakage speed is fast, the internal gas is discharged to avoid excessive expansion of the nylon soft belt. The exhaust port 2 has an external thread and can be tightened and sealed with an exhaust port cap with an internal thread.

[0037] The soft belt wing belts 3 are located on both sides of the soft belt body 1 and provide sufficient stress after being bonded and pressed with the sulfur hexafluoride fully enclosed switchgear GIS body.

[0038] In addition, the leak-proof outer sheath described in step ②, such as Figures 4-5 As shown: it includes an outer sheath body 4, a glue injection port 5, a fastening bolt 6, and an outer sheath wing cover 7.

[0039] The outer sheath body 4 is composed of two half-sheaths, which can cover the flange part. The two half-sheaths are used for easy installation. The sheath body is made of pressure-resistant hard transparent plastic;

[0040] The fastening bolt 6 is used to connect the two half sets;

[0041] The injection port 5 is the inlet of the resin. The resin is pumped into the space between the outer sheath body and the soft belt body 1 from the injection port 5. The resin can support and press the soft belt body 1. The position of the injection port 5 coincides with the position of the exhaust port 2, which is convenient for subsequent pumping and closing of the exhaust port 2.

[0042] The outer sheath wing sleeves 7 are located on both sides of the outer sheath body 4 and can be tightly pressed against the soft belt wing sleeves 3 after being wrapped with the composite material belt to ensure that the gas does not overflow from there.

[0043] The present invention is further described below with a specific embodiment:

[0044] The gas chamber flange of the B-phase circuit breaker of a 220kV combined electrical appliance leaked, with a gauge pressure of 0.57MPa. The gas chamber pressures of the adjacent A and C-phase circuit breakers were both 0.62MPa. Infrared leak detection revealed a leak in the flange near the busbar side knife switch of the circuit breaker.

[0045] By asking the circuit breaker manufacturer and measuring with a tape measure on site, the circumference, width and height of the flange were determined, and a leak repair plan was formulated. A sulfur hexafluoride leak repair soft tape of appropriate size was selected and cut to a suitable length for use; the aluminum alloy of the flange body on both sides was polished and rusted, and the soft tape body 1 was covered on the flange, and the exhaust port 2 was opened and kept facing upward; the soft tape wing 3 was fully bonded to the polished and rusted part of the combined electrical body with adhesive, and the soft tape wing 3 was wrapped and pressed with a composite tape to ensure that the gas does not overflow from here; after the soft tape wing 3 is completely cured, the leak repair outer sheath is installed to ensure that the injection port 5 and the exhaust port 2 coincide, which is convenient for subsequent pumping and closing of the exhaust port 2, and the outer sheath wing 7 is covered on the soft tape wing 3, and the middle is completely bonded with adhesive, and after curing, it is wrapped and pressed with a composite tape. Combine the leak repair pump and the leak repair gun, connect the leak repair gun mouth with a capillary, and inject the resin into the leak repair pump. A capillary is passed through the glue injection port 5 of the leak-proof outer sheath, and resin is pumped in through the capillary. The position of the capillary is continuously moved during the infusion process. When the resin is almost fully infused, the exhaust port 2 of the leak-proof soft belt is closed, and the entire outer sheath is filled with resin. The glue injection port 5 is closed to end the leak-proofing.

[0046] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, which all belong to the protection scope of the present invention.

Claims

1. A method for repairing leakage of sulfur hexafluoride combination electrical appliances, the steps are as follows: ① Cover the leaking flange with the soft belt body (1) of the leak-proof soft belt, open the exhaust port (2) of the leak-proof soft belt, and reduce the gas pressure in the soft belt; fully bond the soft belt wing (3) of the leak-proof soft belt to the combined electrical appliance body with an adhesive, and wrap and press the soft belt wing (3) with a composite material belt; ② After the soft belt wing (3) is completely cured, the leak-proof outer sheath is installed, and the outer sheath wing (7) is covered on the soft belt wing (3), and the middle is completely bonded with an adhesive, and after curing, it is wrapped and pressed with a composite material belt; ③ Assemble the leak repair pump and the leak repair gun, connect the leak repair gun mouth to the capillary tube, insert the capillary tube from the glue injection port (5) of the leak repair outer sheath, pump resin into the capillary tube with a pump, and continuously move the capillary tube during the injection process. When the resin injection is almost completed, close the exhaust port (2) of the leak repair soft belt, fill the entire outer sheath with resin, close the glue injection port (5), and end the leak repair.

2. The method for repairing leakage of sulfur hexafluoride combined electrical appliances according to claim 1, characterized in that: The leak-proof soft belt comprises a soft belt body (1), an exhaust port (2), and a soft belt wing (3). The soft belt body (1) is a dense nylon soft belt; The exhaust port (2) is located on the dense nylon soft belt, and the exhaust port (2) is sealed by an exhaust port cap; The soft belt wing belts (3) are located on both sides of the soft belt body (1).

3. The method for repairing leakage of sulfur hexafluoride combined electrical appliances according to claim 1, characterized in that: The leak-proof outer sheath comprises an outer sheath body (4), a glue injection port (5), a fastening bolt (6), and an outer sheath wing cover (7). The outer sheath body (4) is composed of two half sheaths; The fastening bolt (6) is used to connect the two half sleeves; The injection port (5) is the inlet of the resin; The outer sheath wing covers (7) are located on both sides of the outer sheath body (4).

4. The method for repairing leakage of sulfur hexafluoride combined electrical appliances according to claim 3, characterized in that: The outer sheath body (4) and the outer sheath wing cover (7) are both made of pressure-resistant hard transparent plastic.

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