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

Transformer oil tank oil leakage grading detection device and detection method Download PDF

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Publication number
CN111678654A
CN111678654A CN202010473756.3A CN202010473756A CN111678654A CN 111678654 A CN111678654 A CN 111678654A CN 202010473756 A CN202010473756 A CN 202010473756A CN 111678654 A CN111678654 A CN 111678654A
Authority
CN
China
Prior art keywords
oil tank
transformer oil
inflating
sealing cover
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010473756.3A
Other languages
Chinese (zh)
Inventor
黄铁成
江志莹
肖丹
阚国平
季岩涛
李�昊
高金昊
姜君
郭文浩
秦可为
孙杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qiqihar Power Supply Co Of State Grid Heilongjiang Electric Power Co ltd
State Grid Corp of China SGCC
Original Assignee
Qiqihar Power Supply Co Of State Grid Heilongjiang Electric Power Co ltd
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qiqihar Power Supply Co Of State Grid Heilongjiang Electric Power Co ltd, State Grid Corp of China SGCC filed Critical Qiqihar Power Supply Co Of State Grid Heilongjiang Electric Power Co ltd
Priority to CN202010473756.3A priority Critical patent/CN111678654A/en
Publication of CN111678654A publication Critical patent/CN111678654A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • G01M3/10Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for containers, e.g. radiators

Abstract

A transformer oil tank oil leakage grading detection device and a detection method. The uncertain factors of the transformer oil tank in the manufacturing and using processes cause the transformer oil tank to have the defects of cracks and the like, and finally cause the oil leakage of the transformer oil tank, thereby causing great threat to the safe operation of the transformer and the power grid. The invention comprises the following components: the sealing device comprises a sealing cover (4), wherein a circle of groove is formed in the top end of the inside of the sealing cover, a square ring sealing gasket (8) 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 face of the inside of the sealing cover, a circular ring inflating ring (10) is embedded in each groove, the three circular ring inflating rings are connected with inflating tubes, and the three inflating tubes are communicated with an inflating device through a connecting tube (9); the sealing cover is provided with a pressure gauge (7), the center of the sealing cover is communicated with an air supply pipe (5), and the air supply pipe is communicated with an air compressor (6) and used for supplying compressed air. The invention is used for detecting oil leakage of the transformer oil tank.

Description

Transformer oil tank oil leakage grading detection device and detection method
The technical field is as follows:
the invention relates to a grading detection device and a grading detection method for oil leakage of a transformer oil tank.
Background art:
the transformer oil tank is an important component of the transformer, and has an insulation and heat dissipation effect on an iron core and a coil in the transformer, and the transformer oil tank finally leaks oil due to the defects of cracks and the like caused by uncertain factors in the manufacturing and using processes of the transformer oil tank, so that the safe operation of the transformer and a power grid is greatly threatened.
The invention content is as follows:
the invention aims to provide a grading detection device and a grading detection method for oil leakage of a transformer oil tank.
The above purpose is realized by the following technical scheme:
the utility model provides a transformer tank hierarchical detection device of oil leak which constitutes and includes: the sealing device comprises a sealing cover, 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 inflating ring is embedded in each groove, the three circular ring inflating rings are connected with inflating tubes, and the three inflating tubes are communicated with an inflating 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.
A detection method of a transformer oil tank oil leakage grading detection device 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 to cause inaccurate bottom leakage detection, 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 full of 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, supplementing air through inflation of the three circular ring inflating rings to realize second-step sealing, placing quarter water into the water tank, then inflating the transformer oil tank, and flushing 1MPa of gas in the first step, whether bubbles emerge from the part of the transformer oil tank under water is observed, then pressurization is carried out respectively, pressurization is carried out for the first time to 1.2MPa, pressurization is carried out for the second time to 1.5MPa, pressurization is carried out for the third time to 1.9MPa, whether bubbles emerge is observed for the third time, water is continuously filled into the water tank to one half after observation is finished, whether bubbles emerge is observed when the water tank is filled with water, the leakage point and the welding line thin part at the position can be detected, and repair welding can be carried out on the thin part.
Has the advantages that:
1. the invention can detect the leakage of the transformer oil tank, and can improve the sealing effect by sealing the sealing cover twice, 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 line of the transformer oil tank, and can perform repair welding aiming at the thin spot after detection, thereby ensuring the service life and the sealing property of the transformer oil tank.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the seal cap;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 3;
in the figure: 1. a cross rib plate; 2. a water tank; 3. a transformer tank; 4. a sealing cover; 5. a gas supply pipe; 6. an air compressor; 7. a pressure gauge; 8. a square ring sealing gasket; 9. connecting a pipeline; 10. the ring is an inflatable ring.
The specific implementation mode is as follows:
example 1:
the utility model provides a transformer tank hierarchical detection device of oil leak which constitutes and includes: the sealing structure comprises a sealing cover 4, wherein a circle of groove is formed in the top end inside the sealing cover, a square ring sealing gasket 8 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 inside the sealing cover, a circular ring inflating ring 10 is embedded in each groove, the three circular ring inflating rings are connected with inflating tubes, and the three inflating tubes are communicated to an inflating device through a connecting tube 9;
the sealing cover is provided with a pressure gauge 7, the center of the sealing cover is communicated with an air supply pipe 5, and the air supply pipe is communicated with an air compressor 6 and used for supplying compressed air.
Example 2:
a detection method of a transformer oil tank oil leakage grading detection device comprises the steps of placing a transformer oil tank in a water tank 2, welding a cross rib plate 1 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 full of 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, supplementing air 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, and flushing 1MPa of gas in the first, whether bubbles emerge from the part of the transformer oil tank under water is observed, then pressurization is carried out respectively, pressurization is carried out for the first time to 1.2MPa, pressurization is carried out for the second time to 1.5MPa, pressurization is carried out for the third time to 1.9MPa, whether bubbles emerge is observed for the third time, water is continuously filled into the water tank to one half after observation is finished, whether bubbles emerge is observed when the water tank is filled with water, the leakage point and the welding line thin part at the position can be detected, and repair welding can be carried out on the thin part.

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.
CN202010473756.3A 2020-05-29 2020-05-29 Transformer oil tank oil leakage grading detection device and detection method Pending CN111678654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010473756.3A CN111678654A (en) 2020-05-29 2020-05-29 Transformer oil tank oil leakage grading detection device and detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010473756.3A CN111678654A (en) 2020-05-29 2020-05-29 Transformer oil tank oil leakage grading detection device and detection method

Publications (1)

Publication Number Publication Date
CN111678654A true CN111678654A (en) 2020-09-18

Family

ID=72452988

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010473756.3A Pending CN111678654A (en) 2020-05-29 2020-05-29 Transformer oil tank oil leakage grading detection device and detection method

Country Status (1)

Country Link
CN (1) CN111678654A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112268665A (en) * 2020-11-12 2021-01-26 一重集团天津重工有限公司 Method for detecting leakage of welding seam of structural member cavity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112268665A (en) * 2020-11-12 2021-01-26 一重集团天津重工有限公司 Method for detecting leakage of welding seam of structural member cavity

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