Oil and gas casing test tool

Abstract

The present invention provides an oil and gas casing test tool. It includes an upper transition plate installed on the upper flange surface of the oil and gas casing flange and a lower transition plate installed on the lower flange surface of the oil and gas casing flange, the upper transition plate is connected to the flange of the hollow composite insulator, the top of the hollow composite insulator is connected to the upper cover, a section of round tube is inserted into the hollow composite insulator from the upper cover, the inner wall of the round tube is provided with round tube contact fingers, an aluminum tube is installed in the round tube and is in equipotential contact with the round tube through the round tube contact fingers, the round tube extends downward to the gas end of the oil and gas casing and is in equipotential contact with the gas end of the oil and gas casing; the bottom of the lower transition plate is connected to the oil storage, the bottom of the oil storage is connected to the base, a pressure equalizing ball is provided at the oil end of the oil and gas casing, a pressure equalizing ball contact finger is installed inside the pressure equalizing ball, and the pressure equalizing ball contact finger is in electrical equipotential contact with the metal of the oil end of the oil and gas casing. The present invention can simultaneously complete the factory test and verification test of the oil and gas casing.

Description

Technical field:

[0001] The invention relates to an oil and gas casing test tool, belonging to the technical field of electrical equipment. Background technology:

[0002] The working condition of the oil and gas bushing is that one end is inserted into the transformer oil and the other end is inserted into the GIS combined electrical appliance. Both ends of the oil and gas bushing run in a strong insulating medium. Unlike the traditional transformer bushing, it has no external insulation, so the structure is shorter and smaller. To simulate its actual working conditions, it is necessary to make a special test fixture to achieve its testable conditions.

[0003] In addition, the product needs to pass a series of tests before leaving the factory to verify whether the product quality is qualified, that is, the factory test, which also includes an airtight test to verify the sealing performance of the casing flange. Lightning impulse test, operation impulse test, etc. need to be completed in type test or verification test, and the applied voltage is higher. Therefore, whether it is factory test or verification test, in order to meet the test conditions, special test tooling needs to be made. There is no special tooling in the existing technology that can complete factory test and verification test at one time. Summary of the invention:

[0004] The purpose of the present invention is to provide an oil and gas casing test tool to address the above-mentioned problems. The tool is suitable for oil and gas casings of different voltage levels, can complete factory tests and verification tests at the same time, adopts a finger connection method, and is quick and convenient to install.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A test fixture for oil and gas casing comprises an upper transition plate installed on the upper flange surface of the oil and gas casing flange and a lower transition plate installed on the lower flange surface of the oil and gas casing flange, wherein the upper transition plate is connected to the flange of a hollow composite insulator, the top of the hollow composite insulator is connected to an upper cover, a section of a round tube is extended into the hollow composite insulator from the upper cover, a round tube contact finger is provided on the inner wall of the round tube, an aluminum tube is installed in the round tube and is in equipotential contact with the round tube through the round tube contact finger, the round tube extends downward to the gas end of the oil and gas casing and is in equipotential contact with the gas end of the oil and gas casing; the bottom of the lower transition plate is connected to an oil reservoir, the bottom of the oil reservoir is connected to a base, a pressure equalizing ball is provided at the oil end of the oil and gas casing, a pressure equalizing ball contact finger is installed inside the pressure equalizing ball, and the pressure equalizing ball contact finger is in electrical equipotential contact with the metal of the oil end of the oil and gas casing.

[0007] The oil and gas casing test fixture is provided with a contact seat at the gas end of the aluminum tube and the oil and gas casing, the side wall inside the contact seat is provided with an oil and gas casing gas end contact finger connected to the aluminum tube with the same potential, and the bottom surface of the contact seat is provided with a spring for buffering the hard contact of the aluminum tube.

[0008] In the oil and gas casing test fixture, a sealing groove is provided on the plate surface where the upper transition plate contacts the hollow composite insulator and a sealing ring is inserted therein for sealing, and a sealing ring is also provided in the middle of the connection position between the upper transition plate and the upper flange surface of the oil and gas casing flange.

[0009] In the oil and gas casing test fixture, a sealing ring is provided at the position where the lower transition plate is connected to the oil reservoir, and a sealing ring is also provided in the middle of the connection position between the lower transition plate and the lower flange surface of the oil and gas casing flange.

[0010] The oil and gas casing test tooling is provided with an oil inlet on the oil storage, and an oil inlet valve is provided at the oil inlet.

[0011] Beneficial effects:

[0012] The present invention is applicable to oil and gas casings of different voltage levels, can complete factory tests and verification tests at the same time, adopts a finger-connection method, and is quick and convenient to install. Description of the drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is an enlarged view of the A part of the present invention.

[0015] Figure 3 It is an enlarged view of the B part of the present invention.

[0016] Figure 4 It is an enlarged view of the C portion of the present invention.

[0017] In the figure: 1. Upper cover; 2. Round tube contact finger; 3. Aluminum tube; 4. Hollow composite insulator; 5. Oil and gas casing gas end contact finger; 6. Spring; 7. Contact seat; 8. Oil and gas casing; 9. Upper transition plate; 10. Oil and gas casing flange; 11. Lower transition plate; 12. Oil storage; 13. Equalizing ball; 14. Equalizing ball contact finger; 15. Oil inlet valve; 16. Base. Specific implementation method:

[0018] like Figure 1-3As shown: the oil and gas casing test tooling of this embodiment includes an upper transition plate 9 installed on the upper flange surface of the oil and gas casing 8 flange and a lower transition plate 11 installed on the lower flange surface of the oil and gas casing flange 10, the upper transition plate is connected to the flange of the hollow composite insulator 4, the top of the hollow composite insulator is connected to the upper cover 1, a section of round tube is extended into the hollow composite insulator from the upper cover, the inner wall of the round tube is provided with a round tube contact finger 2, the aluminum tube 3 is installed in the round tube and is in equipotential contact with the round tube through the round tube contact finger, the round tube extends downward to the gas end of the oil and gas casing and is in equipotential contact with the gas end of the oil and gas casing; the bottom of the lower transition plate is connected to the oil storage 12, the bottom of the oil storage is connected to the base 16, a pressure equalizing ball 13 is provided at the oil end of the oil and gas casing, a pressure equalizing ball contact finger 14 is installed inside the pressure equalizing ball, and the pressure equalizing ball contact finger is in electrical equipotential contact with the metal of the oil end of the oil and gas casing.

[0019] In the oil and gas casing test fixture described in this embodiment, the aluminum tube and the gas end of the oil and gas casing are provided with a contact seat 7, the side wall inside the contact seat is provided with an oil and gas casing gas end contact finger 5 connected to the aluminum tube with the same potential, and the bottom surface of the contact seat is provided with a spring 6 for buffering the hard contact of the aluminum tube.

[0020] In the oil and gas casing test fixture described in this embodiment, a sealing groove is provided on the plate surface where the upper transition plate contacts the hollow composite insulator and a sealing ring is inserted for sealing, and a sealing ring is also provided in the middle of the connection position between the upper transition plate and the upper flange surface of the oil and gas casing flange.

[0021] In the oil and gas casing test fixture described in this embodiment, a sealing ring is provided at the position where the lower transition plate is connected to the oil reservoir, and a sealing ring is also provided in the middle of the connection position between the lower transition plate and the lower flange surface of the oil and gas casing flange.

[0022] In the oil and gas casing test fixture described in this embodiment, an oil inlet is provided on the oil reservoir, and an oil inlet valve 15 is provided at the oil inlet.

[0023] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. An oil and gas casing test tool, characterized by: It comprises an upper transition plate installed on the upper flange surface of the oil and gas casing flange and a lower transition plate installed on the lower flange surface of the oil and gas casing flange, the upper transition plate is connected to the flange of the hollow composite insulator, the top of the hollow composite insulator is connected to the upper cover, a section of round tube is extended into the hollow composite insulator from the upper cover, the inner wall of the round tube is provided with round tube contact fingers, the aluminum tube is installed in the round tube and is in equipotential contact with the round tube through the round tube contact fingers, the round tube extends downward to the gas end of the oil and gas casing and is in equipotential contact with the gas end of the oil and gas casing; the bottom of the lower transition plate is connected to the oil storage, the bottom of the oil storage is connected to the base, a pressure equalizing ball is provided at the oil end of the oil and gas casing, a pressure equalizing ball contact finger is installed inside the pressure equalizing ball, and the pressure equalizing ball contact finger is in electrical equipotential contact with the metal of the oil end of the oil and gas casing; The aluminum tube and the gas end of the oil and gas casing are provided with a contact seat, the side wall inside the contact seat is provided with a gas end contact finger of the oil and gas casing connected to the aluminum tube with the same potential, and the bottom surface of the contact seat is provided with a spring for buffering the hard contact of the aluminum tube; The plate surface of the upper transition plate in contact with the hollow composite insulator is provided with a sealing groove and a sealing ring is inserted therein for sealing, and a sealing ring is also provided in the middle of the connection position between the upper transition plate and the upper flange surface of the oil and gas casing flange; A sealing ring is provided at the position where the lower transition plate is connected to the oil storage, and a sealing ring is also provided in the middle of the position where the lower transition plate is connected to the lower flange surface of the oil and gas casing flange.

2. The oil and gas casing test tool according to claim 1 is characterized by: The oil storage is provided with an oil inlet, and an oil inlet valve is provided at the oil inlet.

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