CN115683734A - Sealed oil taking gun for 220 KV oil-immersed transformer - Google Patents

Abstract

A sealed oil extraction gun for 220 kV oil-immersed transformers proposed by the present invention belongs to the technical field of oil extraction for oil-immersed transformers, and includes an oil extraction gun body. Hexagonal screw hole, and the end of the inner hexagonal screw hole is provided with a rubber pad coaxial with it. The inner hexagonal screw hole is used to cooperate with the hexagonal bolt on the oil drain nozzle of the transformer. The main pipeline is connected, and the main pipeline is connected with an oil pipeline and a waste oil pipeline. A supervisor valve is installed at the joint between the oil pipeline and the main pipeline, and a waste oil pipeline valve is installed at the joint between the waste oil pipeline and the main pipeline. The hose is connected with the oil extraction pipeline and an oil extraction three-way valve is installed on the oil extraction hose; the waste oil recovery bottle is connected with the waste oil pipeline. The oil-taking gun can collect the oil samples of the transformer in a fully sealed state. When taking oil, the waste oil is drained and air bubbles are removed first, so as to ensure that the oil samples taken by the oil-taking syringe are valid oil samples.

Description

A sealed oil pick-up gun for 220 kV oil-immersed transformer

technical field

The invention belongs to the technical field of oil extraction for oil-immersed transformers, and in particular relates to a sealed oil extraction gun for 220 kV oil-immersed transformers.

Background technique

According to the requirements of GB/T 14542-2017 "Guidelines for Maintenance and Management of Transformer Oil" and DL/T722-2014 "Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil", oil-immersed power transformers need to carry out sampling work regularly to check the insulating oil Chromatography and routine laboratory analysis, through the test results to determine whether the transformer is abnormal. According to the requirements of GB/T7597-2007 "Power Oil Transformer and Turbine Oil Sampling Method", when sampling, try to ensure that the oil sample is not polluted, and the test data is accurate and valid, so as to truly reflect the operation status of the transformer body. However, during the on-site oil sampling process of 220 kV oil-immersed transformers, because the staff lacked suitable tools, they usually took an open method. Moisture-proof.

Contents of the invention

In view of this, the purpose of the present invention is to solve the current problem of taking out the insulating oil of the 220 kV oil-immersed transformer in a non-fully sealed manner. The oil bottle and the transformer oil outlet are exposed to the air, which is easy to cause Moisture and impurities in the air are mixed into the oil bottle, resulting in inaccurate results of the insulating oil during the detection process, which can easily lead to misjudgments and wrong conclusions. A sealed extraction method for 220 kV oil-immersed transformers is provided. Oil gun, the oil gun uses threaded connection and rubber gasket to connect and seal the transformer oil drain nozzle. When taking oil, first drain the waste oil from the waste oil pipeline to ensure that the oil sample taken by the oil taking syringe is effective oil. So as to ensure the accuracy of laboratory test data.

The technical solution adopted by the present invention to achieve the above purpose is: 220 kV oil-immersed transformer sealed oil extraction gun, including the oil extraction gun gun body, characterized in that it also includes the main pipeline, oil extraction pipeline, waste oil pipeline, oil extraction Syringe, oil taking three-way valve, oil taking hose and waste oil recovery bottle, the main pipeline is arranged inside the oil taking gun gun body; an inner hexagon screw hole is provided at the head of the oil taking gun gun body, and The end of the inner hexagonal screw hole is provided with a rubber pad coaxial with it. The inner hexagonal screw hole is used to cooperate with the hexagonal bolt on the oil drain nozzle of the transformer. At the same time, the inner hexagonal screw hole is connected with the main pipeline. The oil gun drives the hexagonal bolt on the oil drain nozzle of the transformer to rotate through the inner hexagon screw hole, thereby opening the oil drain nozzle of the transformer so that the insulating oil enters the main pipeline; the oil extraction pipeline and waste oil pipeline are respectively connected to the main pipeline, and A supervisor valve is installed at the junction of the oil pipeline and the main pipeline, and a waste oil pipeline valve is installed at the junction of the waste oil pipeline and the main pipeline; A three-way valve for oil extraction is installed; the waste oil recovery bottle is connected with the waste oil pipeline.

Further, the rubber pad is a sealing rubber pad.

Further, the main valve is a rotary valve, which is used to switch the insulating oil from entering the waste oil pipeline or the oil extraction pipeline.

Furthermore, the material of the gun body of the oil extraction gun is white steel.

Further, the main pipeline, the waste oil pipeline and the oil extraction pipeline are all PVC pipes.

Further, the main pipeline, the waste oil pipeline and the oil extraction pipeline are all PVE pipes.

Further, the oil-taking syringe is a glass syringe.

Further, the waste oil recovery bottle is a glass flask.

Through the above design scheme, the present invention can bring the following beneficial effects: a sealed oil pick-up gun for 220 kV oil-immersed transformer provided by the present invention has simple structure, fast installation, convenient operation and good sealing performance, and can be used in the whole Collect the oil samples of the transformer in a sealed state, and eliminate the invalid oil samples at the front end of the oil drain nozzle of the transformer, which can ensure the collection of effective oil samples, and eliminate the influence of air bubbles, air moisture and other factors, and ensure that the collected oil samples can be authentic The internal state of the React device.

Description of drawings

FIG. 1 is a structural schematic diagram of a sealed oil-taking gun for a 220 kV oil-immersed transformer proposed by the present invention.

In the figure: 1-hexagonal screw hole, 2-rubber pad, 3-main valve, 4-oil gun body, 5-waste oil pipeline valve, 6-waste oil pipeline, 7-main pipeline, 8-oil intake pipe Road, 9-oil taking syringe, 10-oil taking three-way valve, 11-oil taking hose, 12-waste oil recovery bottle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

As shown in Figure 1, a sealed oil pick-up gun for a 220 kV oil-immersed transformer includes an oil pick-up gun body 4, a main pipeline 7, an oil pick-up pipeline 8, a waste oil pipeline 6, and an oil pick-up syringe 9 , the three-way valve 10 for oil extraction, the oil extraction hose 11 and the waste oil recovery bottle 12, the main pipeline 7 is arranged inside the oil extraction gun gun body 4; Hexagonal screw hole 1, and the end of the inner hexagonal screw hole 1 is provided with a coaxial rubber pad 2, the inner hexagonal screw hole 1 is used to cooperate with the hexagonal bolt on the oil drain nozzle of the transformer, and the inner hexagonal screw hole 1 is connected with the main pipeline 7 Connected, when working, rotate the oil pick-up gun, and the oil pick-up gun drives the hexagonal bolt on the oil drain nozzle of the transformer to rotate through the inner hexagonal screw hole 1, thereby opening the oil drain nozzle of the transformer, so that the insulating oil enters the main pipeline 7; the oil pick-up pipeline 8 and the waste oil pipeline 6 are respectively connected to the main pipeline 7, and a supervisory valve 3 is installed at the joint between the oil intake pipeline 8 and the main pipeline 7, and a waste oil pipeline valve 5 is installed at the joint between the waste oil pipeline 6 and the main pipeline 7; The oil taking syringe 9 is connected to the oil taking pipeline 8 through the oil taking hose 11 , and an oil taking three-way valve 10 is installed on the oil taking hose 11 ; the waste oil recovery bottle 12 is connected to the waste oil pipeline 6 .

The transformer oil drain nozzle installed at the transformer oil drain port belongs to the prior art and will not be described in detail here. The transformer oil drain nozzle penetrates into the oil gun gun body 4 and communicates with the main pipeline 7, and connects to the oil gun gun body through the rubber pad 2. 4. Sealed connection; the material of the oil gun body 4 is selected from white steel to ensure that the strength meets the work requirements; the inner hexagonal screw hole 1 described in the present invention is the connection part with the transformer oil discharge nozzle, and adopts the inner hexagonal structure, which can be used for the transformer. The hex bolt on the oil drain nozzle is rotated to open the oil drain nozzle of the transformer so that the insulating oil enters the main pipeline 7; the rubber pad 2 is a sealing rubber pad, which satisfies the need for a good seal after the oil drain nozzle of the transformer is inserted into the oil pick-up gun; The above-mentioned main valve 3 is a rotary valve, which is used as a control valve of the oil line of the main line 7 to switch insulating oil into the waste oil line 6 or the oil extraction line 8; the waste oil line valve 5 is a valve for controlling the opening/closing of the waste oil line 6 , usually in a closed state; the main pipeline 7, the waste oil pipeline 6 and the oil pipeline 8 are all PVC pipes or PVE pipes, which can ensure that the oil sample does not come into contact with metal to cause dirt; the oil hose 11 is used Yu is responsible for connecting the oil intake pipeline 8, the oil intake three-way valve 10 and the oil intake injector 9; The oil sample has no air bubbles; the oil taking syringe 9 is a collection and transportation tool for sealing oil taking, and is responsible for extracting and collecting effective oil samples of the transformer; the waste oil recovery bottle 12 is a glass flask, responsible for collecting The initial waste oil ensures the extraction of effective oil samples.

When working, the oil pick-up gun is sealed and connected with the oil pick-up nozzle of the transformer through the inner hexagonal screw hole 1 and the rubber pad 2. By turning the oil pick-up gun, the hexagonal bolt of the oil pick-up nozzle of the transformer is opened, so that the insulating oil enters the oil pick-up gun. The main valve 3 closes the oil extraction pipeline 8, and the waste oil pipeline valve 5 is in a closed state. Then connect the oil hose 11, the oil syringe 9, the oil three-way valve 10 and the waste oil recovery bottle 12, first open the waste oil pipeline valve 5, and take the invalid oil sample in the pipeline of the transformer oil outlet and near the transformer box. Exclude and collect through the waste oil recovery bottle 12; secondly close the waste oil pipeline valve 5, open the main valve 3, make the effective oil sample flow into the oil extraction pipeline 8, and remove the air bubbles in the oil sample through the oil extraction three-way valve 10 , and then turn the oil extraction three-way valve 10 switch, inject the effective oil sample into the oil extraction syringe 9, after the oil extraction is completed, use the rubber cap to seal the oil extraction syringe 9; finally close the main valve 3, and rotate the oil extraction gun to Close the hexagonal bolt on the oil nozzle of the transformer, separate the oil gun from the oil nozzle of the transformer, restore the equipment state before oil extraction, and complete the oil extraction.

In summary, a sealed oil extraction gun for 220 kV oil-immersed transformer proposed by the present invention has simple structure, fast installation, convenient operation and good sealing performance, and can effectively extract the insulating oil of oil-immersed transformer, and can Ensure good sealing, avoid air or moisture from entering the oil extraction injector 9 during the extraction process, resulting in inaccurate insulating oil detection data. After using the oil gun, the accuracy and tightness of insulating oil sampling are greatly improved, the labor intensity of operators is reduced, the operation is convenient, time is saved, and the smooth progress of oil-immersed transformer insulating oil testing is guaranteed.

Claims (8)

1. The utility model provides a sealed oil gun of getting for 220 kilovolt oil-immersed transformer, includes and gets oil gun rifle body (4), its characterized in that: the oil extraction gun is characterized by further comprising a main pipeline (7), an oil extraction pipeline (8), a waste oil pipeline (6), an oil extraction injector (9), an oil extraction three-way valve (10), an oil extraction hose (11) and a waste oil recovery bottle (12), wherein the main pipeline (7) is arranged inside the oil extraction gun body (4); the head of the oil taking gun body (4) is provided with an inner hexagonal screw hole (1), the tail end of the inner hexagonal screw hole (1) is provided with a rubber gasket (2) coaxial with the inner hexagonal screw hole, the inner hexagonal screw hole (1) is used for being matched with a hexagonal bolt on a transformer oil drain nozzle, and meanwhile, the inner hexagonal screw hole (1) is communicated with a main pipeline (7), when the oil taking gun works, the oil taking gun is rotated and drives the hexagonal bolt on the transformer oil drain nozzle to rotate through the inner hexagonal screw hole (1), so that the transformer oil drain nozzle is opened, and insulating oil enters the main pipeline (7); the oil taking pipeline (8) and the waste oil pipeline (6) are respectively connected to the main pipeline (7), a main pipeline valve (3) is installed at the connection part of the oil taking pipeline (8) and the main pipeline (7), and a waste oil pipeline valve (5) is installed at the connection part of the waste oil pipeline (6) and the main pipeline (7); the oil taking injector (9) is connected with the oil taking pipeline (8) through an oil taking hose (11), and an oil taking three-way valve (10) is installed on the oil taking hose (11); and the waste oil recovery bottle (12) is connected with the waste oil pipeline (6).

2. The sealed oil extraction gun for the 220 kV oil-filled transformer according to claim 1, wherein: the rubber pad (2) is a sealing rubber pad.

3. The sealed oil-extracting gun for the 220 KV oil-filled transformer according to claim 1, wherein: the main pipe valve (3) is a rotary valve and is used for switching insulating oil to enter the waste oil pipeline (6) or the oil taking pipeline (8).

4. The sealed oil extraction gun for the 220 kV oil-filled transformer according to claim 1, wherein: the oil gun body (4) is made of white steel.

5. The sealed oil-extracting gun for the 220 KV oil-filled transformer according to claim 1, wherein: the main pipeline (7), the waste oil pipeline (6) and the oil taking pipeline (8) are all PVC pipes.

6. The sealed oil extraction gun for the 220 kV oil-filled transformer according to claim 1, wherein: the main pipeline (7), the waste oil pipeline (6) and the oil taking pipeline (8) are all PVE pipes.

7. The sealed oil extraction gun for the 220 kV oil-filled transformer according to claim 1, wherein: the oil taking injector (9) is a glass injector.

8. The sealed oil-extracting gun for the 220 KV oil-filled transformer according to claim 1, wherein: the waste oil recovery bottle (12) is a glass flask.

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