CN111678654A - Transformer oil tank oil leakage classification detection device and detection method - Google Patents

Abstract

A transformer oil tank oil leakage classification detection device and detection method. Uncertain factors in the manufacture and use of transformer oil tanks make the transformer oil tank cracks and other defects, and eventually lead to oil leakage of the transformer oil tank, which poses a great threat to the safe operation of transformers and power grids. The composition of the invention includes: a sealing cover (4), a groove is formed at the inner top of the sealing cover, a square ring gasket (8) is embedded in the groove for sealing the top of the side of the transformer oil tank, and the inner side of the sealing cover is There are three grooves arranged up and down, each groove is embedded with a circular inflatable ring (10), the three circular inflatable rings are all connected with inflatable pipes, and the three inflatable pipes are connected to the inflatable device through a connecting pipe 9 A pressure gauge (7) is installed on the sealing cover, the center of the sealing cover is communicated with the air supply pipe (5), and the air supply pipe is communicated with the air compressor (6) for supplying compressed air. The invention is used for oil leakage detection of transformer oil tank.

Description

Transformer oil tank oil leakage classification detection device and detection method

Technical field:

The invention relates to a classification detection device and detection method for oil leakage of a transformer oil tank.

Background technique:

The transformer oil tank is an important part of the transformer, and it is related to whether the transformer oil can safely and reliably insulate and dissipate the iron core and coil inside the transformer. And other defects, eventually lead to oil leakage of the transformer tank, which poses a great threat to the safe operation of the transformer and the power grid.

Invention content:

The purpose of the present invention is to provide a classification detection device and detection method for oil leakage of a transformer oil tank.

The above purpose is achieved through the following technical solutions:

A device for grading and detecting oil leakage of a transformer oil tank, which is composed of a sealing cover, a groove is formed at the inner top of the sealing cover, and a square ring gasket is embedded in the groove, which is used for the side edge of the transformer oil tank. The top is sealed, the inner side of the sealing cover is provided with three grooves arranged up and down, each of the grooves is embedded with a circular inflatable ring, and the three circular inflatable rings are connected with inflatable tubes , the three inflatable pipes are connected to the inflatable device through a connecting pipe;

A pressure gauge is installed on the sealing cover, the center of the sealing cover is communicated with an air supply pipe, and the air supply pipe is communicated with an air compressor for supplying compressed air.

A detection method of a transformer oil tank leakage classification detection device. The transformer oil tank is placed in a water tank, and a cross rib is welded at the bottom of the water tank to support the transformer oil tank to prevent it from touching the bottom of the water tank, resulting in inaccurate bottom leakage detection. The cover is placed on the transformer oil tank, and the top of the side of the transformer oil tank is in contact with the square ring gasket to achieve the first step of sealing. The three annular inflatable rings are inflated through the inflation device, so that the three annular inflatable rings are filled with gas and sealed. When the cover is placed on the transformer tank, the distance between the side of the transformer tank and the inner side of the sealing cover is 1-2mm. In this way, the air is supplemented by the inflation of the three circular inflatable rings to achieve the second step of sealing. Put the water tank into the One quarter of the water, and then inflate the transformer tank, the first step is to rush into 1MPa gas, observe whether there are bubbles emerging from the underwater part of the transformer tank, and then pressurize separately, the first pressurized to 1.2MPa, Pressurize to 1.5Mpa for the second time, and pressurize to 1.9Mpa for the third time. Observe whether there are bubbles emerging for three times. After the observation is completed, continue to fill the water tank to half of the water, and observe whether there are bubbles emerging. After that, fill the water tank with water and observe whether there are bubbles emerging. You can detect the leakage point and the thin weld, and repair the thin area.

Beneficial effects:

1. The present invention can perform leakage detection on the transformer oil tank, and seal twice through the sealing cover, which can improve the sealing effect, ensure the gas pressure in the transformer oil tank, and ensure the detection effect and accuracy.

The invention can detect the thin spot of the welding seam of the transformer oil tank, and after detecting the thin spot, repair welding can be performed to ensure the service life and the tightness of the transformer oil tank.

Description of drawings:

Accompanying drawing 1 is the structural representation of the present invention;

Accompanying drawing 2 is the structural representation of sealing cover;

Accompanying drawing 3 is the A-A part sectional view of accompanying drawing 2;

Accompanying drawing 4 is the B part enlarged view of accompanying drawing 3;

In the figure: 1. Cross rib; 2. Water tank; 3. Transformer oil tank; 4. Sealing cover; 5. Air supply pipe; 6. Air compressor; 7. Pressure gauge; 8. Square ring gasket; 9. Connecting pipeline ; 10. Ring inflatable ring.

Detailed ways:

Example 1:

A transformer oil tank oil leakage classification detection device, which is composed of: a sealing cover 4, the inner top of the sealing cover is provided with a ring of grooves, and a square ring gasket 8 is embedded in the groove for the transformer oil tank. The top of the side is sealed, and the inner side of the sealing cover is provided with three grooves arranged up and down, and each of the grooves is embedded with a circular inflatable ring 10, and the three circular inflatable rings are connected. There are inflatable pipes, and the three inflatable pipes are connected to the inflatable device through a connecting pipe 9;

A pressure gauge 7 is installed on the sealing cover, and the center of the sealing cover communicates with the air supply pipe 5, and the air supply pipe communicates with the air compressor 6 for supplying compressed air.

Example 2:

A detection method for a transformer oil tank oil leakage classification detection device. The transformer oil tank is placed in a water tank 2, and a cross rib 1 is welded at the bottom of the water tank to support the transformer oil tank to prevent it from contacting the bottom of the water tank, resulting in inaccurate bottom leakage detection. Cover the sealing cover on the transformer oil tank, and the top of the side of the transformer oil tank contacts the square ring gasket to achieve the first step of sealing, and inflate the three annular inflatable rings through the inflatable device, so that the three annular inflatable rings are filled with gas , when the sealing cover is placed on the transformer oil tank, the distance between the side of the transformer tank and the inner side of the sealing cover is 1-2mm, so that the air is supplemented by the inflation of the three circular inflatable rings, and the second step of sealing is realized. Put in a quarter of water, and then inflate the transformer tank. In the first step, rush into 1MPa gas, and observe whether there are bubbles emerging from the underwater part of the transformer tank, then pressurize separately, and pressurize to 1.2 for the first time. MPa, pressurize to 1.5Mpa for the second time, and pressurize to 1.9Mpa for the third time. Observe whether there are bubbles emerging for three times. After that, fill the water tank with water and observe whether there are bubbles emerging. You can detect the leakage point and the thin weld, and repair the thin area.

Claims (2)

1. The utility model provides a transformer tank hierarchical detection device of oil leak which constitutes and includes: the sealed lid, characterized by: the top end of the inside of the sealing cover is provided with a circle of groove, a square ring sealing gasket is embedded in the groove and used for sealing the top of the side edge of the transformer oil tank, three grooves which are vertically arranged are formed in the side surface of the inside of the sealing cover, a circular ring inflation ring is embedded in each groove, the three circular ring inflation rings are connected with inflation tubes, and the three inflation tubes are communicated to an inflation device through a connecting tube;

the sealing cover is provided with a pressure gauge, the center of the sealing cover is communicated with an air supply pipe, and the air supply pipe is communicated with an air compressor and used for supplying compressed air.

2. The method for detecting the oil leakage grading detection device of the transformer oil tank as claimed in claim 1, is characterized in that: the method comprises the steps of placing a transformer oil tank in a water tank, welding a cross rib plate at the bottom of the water tank for supporting the transformer oil tank to prevent the transformer oil tank from contacting the bottom of the water tank, so that bottom leakage detection is inaccurate, covering a sealing cover on the transformer oil tank, enabling the top of the side edge of the transformer oil tank to contact a square ring sealing pad to realize first-step sealing, inflating three circular ring inflating rings through an inflating device to enable the three circular ring inflating rings to be fully filled with gas, enabling the distance between the side surface of the transformer oil tank and the inner side surface of the sealing cover to be 1-2mm when the sealing cover is covered on the transformer oil tank, so that air is supplemented through inflation of the three circular ring inflating rings to realize second-step sealing, placing quarter of water into the water tank, then inflating the transformer oil tank, flushing 1MPa of gas in the first step, and observing whether bubbles emerge from, and then pressurizing respectively, wherein the first pressurizing is performed to 1.2MPa, the second pressurizing is performed to 1.5MPa, the third pressurizing is performed to 1.9MPa, whether bubbles emerge is observed for the third pressurizing, the water tank is continuously filled with water to one half after the observation is finished, whether bubbles emerge is observed, then the water tank is filled with water to observe whether bubbles emerge, the leakage point and the welding line thin part can be detected, and the repair welding can be performed on the thin part.

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