CN210664924U - Leakage test tool for low-voltage sleeve in gas-insulated transformer - Google Patents
Leakage test tool for low-voltage sleeve in gas-insulated transformer Download PDFInfo
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- CN210664924U CN210664924U CN201921915755.9U CN201921915755U CN210664924U CN 210664924 U CN210664924 U CN 210664924U CN 201921915755 U CN201921915755 U CN 201921915755U CN 210664924 U CN210664924 U CN 210664924U
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Abstract
The utility model relates to a low voltage bushing leakage test frock in gas insulated transformer belongs to transformer manufacturing technical field. The technical scheme is as follows: the lower extreme of big yoke pipe (2) is enclosed construction, the upper end of big yoke pipe (2) is equipped with low pressure sleeve pipe mounting flange (1), three big yoke pipes (2) are one row and fix on the base, the one end of little yoke pipe (7) is enclosed construction, the other end of little yoke pipe (7) is connected with ball valve (10) and reducing joint (11) through connecting (9), little yoke pipe (7) are connected with three big yoke pipes (2) respectively through three connecting pipes (12), the one end that little yoke pipe (7) are close to joint (9) is equipped with stopper seat (8) of installation manometer. The utility model has the advantages that: whether the low-voltage sleeve pipe leaks gas is detected by installing the low-voltage sleeve pipe on the leakage test tool before product assembly, and the low-voltage sleeve pipe is installed on the gas-insulated transformer after the low-voltage sleeve pipe is detected to be qualified, so that manpower is saved, and the production efficiency is improved.
Description
Technical Field
The utility model relates to a low voltage bushing leakage test frock in gas insulated transformer belongs to transformer manufacturing technical field.
Background
SF is required to be carried out on all flange surfaces after the integral installation of the gas insulated transformer6For detecting gas leakage, if the low-voltage bushing leaks, SF in the transformer needs to be firstly detected6Recovering all gas, contacting with dry air, vacuum-removing the low-pressure sleeve, connecting with sleeve manufacturer for repair, installing the low-pressure sleeve again, vacuumizing, and injecting SF6The gas is then checked for leaks.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low-voltage bushing leakage test frock in gas insulated transformer detects whether low-voltage bushing leaks gas with low-voltage bushing installation on the leakage test frock earlier before the product assembly, detects qualified back and installs low-voltage bushing on gas insulated transformer again, solves the problem that exists among the background art.
The technical scheme of the utility model is that:
the utility model provides a low pressure sleeve pipe leak test frock in gas insulated transformer, contain low pressure sleeve pipe mounting flange, big yoke pipe, little yoke pipe, the cock seat of installation manometer, connect, the ball valve, reducer union and connecting pipe, the lower extreme of big yoke pipe is enclosed construction, the upper end of big yoke pipe is equipped with low pressure sleeve pipe mounting flange, three big yoke pipes are one row to be fixed on the base, the one end of little yoke pipe is enclosed construction, the other end of little yoke pipe is connected with ball valve and reducer union through connecting, little yoke pipe is connected with three big yoke pipes respectively through three connecting pipes, the one end that little yoke pipe is close to the joint is equipped with the cock seat of installation manometer.
The base comprises a long channel steel and a short channel steel, the three large connecting pipes are fixed on the long channel steel in a row, and two ends of the long channel steel are fixed on the short channel steel respectively.
The lower end of the large connecting pipe forms a closed structure through the large connecting pipe sealing plate, and one end of the small connecting pipe forms a closed structure through the small connecting pipe sealing plate.
One end of the connecting pipe is connected to the small connecting pipe, and the other end of the connecting pipe is connected to the lower portion of the large connecting pipe.
The central lines of the large connecting pipe and the small connecting pipe are vertically arranged.
The utility model has the advantages that: whether the low-voltage sleeve pipe leaks gas is detected by installing the low-voltage sleeve pipe on the leakage test tool before product assembly, and the low-voltage sleeve pipe is installed on the gas-insulated transformer after the low-voltage sleeve pipe is detected to be qualified, so that manpower is saved, and the production efficiency is improved.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a side view of the present invention;
FIG. 3 is a schematic view of a large union pipe;
FIG. 4 is a schematic view of a base;
FIG. 5 is a schematic view of a small header;
FIG. 6 is a schematic view of a joint;
FIG. 7 is a schematic view of a plug seat structure for mounting a pressure gauge;
FIG. 8 is a top view of the plug base with the pressure gauge installed;
FIG. 9 is a schematic view of a ball valve;
in the figure: the low-pressure sleeve mounting flange comprises a low-pressure sleeve mounting flange 1, a large connecting pipe 2, a small connecting pipe sealing plate 3, a large connecting pipe sealing plate 4, long groove steel 5, short groove steel 6, a small connecting pipe 7, a plug seat 8 for mounting a pressure gauge, a joint 9, a ball valve 10, a reducing joint 11 and a connecting pipe 12.
Detailed Description
The invention will be further explained by way of example with reference to the accompanying drawings.
Referring to the attached drawings 1-9, a low-voltage sleeve leakage test tool in a gas insulated transformer comprises a low-voltage sleeve mounting flange 1, a large connecting pipe 2, a small connecting pipe 7, a plug seat 8 for mounting a pressure gauge, a joint 9, a ball valve 10, a reducing joint 11 and connecting pipes 12, wherein the lower end of the large connecting pipe 2 is of a closed structure, the low-voltage sleeve mounting flange 1 is arranged at the upper end of the large connecting pipe 2, the three large connecting pipes 2 are fixed on a base in a row, one end of the small connecting pipe 7 is of a closed structure, the other end of the small connecting pipe 7 is connected with the ball valve 10 and the reducing joint 11 through the joint 9, the small connecting pipe 7 is respectively connected with the three large connecting pipes 2 through the three connecting pipes 12, and one end, close to the joint 9, of the small connecting.
In this embodiment, referring to fig. 1-9, the specific manufacturing process is as follows:
(1) one sides of three large connecting pipes 2 with the length and the inner diameter capable of accommodating the guide rod at the lower part of the low-pressure sleeve are sealed by a large connecting pipe sealing plate, and the other side is welded with a mounting flange capable of mounting the low-pressure sleeve;
(2) the bottom parts of the three large connecting pipes 2 are welded on a long channel steel 5, and two short channel steels 6 are welded on two sides of the long channel steel 5 respectively, so that the three large connecting pipes 2 are connected together and can be kept stable;
(3) a small section of connecting pipe 12 is welded at the lower part of each of the three large connecting pipes 2, and the three sections of connecting pipes 12 are connected by a longer small connecting pipe 7;
(4) one end of the small connecting pipe 7 is sealed by a small connecting pipe sealing plate, a plug seat 8 connected with a pressure gauge is welded on the small connecting pipe 7 in a matching way, an external thread joint 9 is welded at the other end of the small connecting pipe 7, and the other side of the joint 9 is connected with a ball valve 10 and a reducing joint 11;
(5) after the tool is manufactured, the gas is required to be flushed to 0.5MPa, and the tool is rotated fully in water to detect whether the tool leaks.
The low-voltage bushing leakage test specifically comprises the following steps:
(1) after the low-voltage sleeve is installed on the leakage test tool, respectively wrapping the low-voltage sleeve installation flange and the head of the low-voltage sleeve by using plastic cloth, and tightly adhering the plastic cloth by using an adhesive tape to prevent gas in the plastic cloth from leaking;
(2) vacuumizing the tool for half an hour through a gas recovery device, and then injecting sulfur hexafluoride gas in the gas recovery device into the tool until the pressure in the tool reaches the leakage testing pressure;
(3) closing the connection between the ball valve disconnecting tool and the gas recovery device;
(4) and (4) after the leakage testing pressure is kept for 12 hours, measuring the content of sulfur hexafluoride gas in the low-voltage sleeve mounting flange and the plastic bag at the sleeve head by using a special sulfur hexafluoride gas detector, wherein the content of sulfur hexafluoride gas is less than 30ppm, and the product is qualified.
Claims (5)
1. The utility model provides a low voltage bushing leakage test frock in gas insulated transformer which characterized in that: contain low pressure sleeve pipe mounting flange (1), big yoke pipe (2), little yoke pipe (7), stopper seat (8) of installation manometer, connect (9), ball valve (10), reducer union (11) and connecting pipe (12), the lower extreme of big yoke pipe (2) is enclosed construction, the upper end of big yoke pipe (2) is equipped with low pressure sleeve pipe mounting flange (1), three big yoke pipes (2) are one row to be fixed on the base, the one end of little yoke pipe (7) is enclosed construction, the other end of little yoke pipe (7) is connected with ball valve (10) and reducer union (11) through connecting (9), little yoke pipe (7) are connected with three big yoke pipes (2) respectively through three connecting pipes (12), the one end that little yoke pipe (7) are close to joint (9) is equipped with stopper seat (8) of installation manometer.
2. The low-voltage bushing leakage test tool in the gas-insulated transformer according to claim 1, characterized in that: the base contains long channel-section steel (5) and short channel-section steel (6), and three big yoke pipes (2) are one row and fix on long channel-section steel (5), and the both ends of long channel-section steel (5) are fixed respectively on short channel-section steel (6).
3. The low-voltage bushing leakage test tool in the gas-insulated transformer according to claim 1, characterized in that: the lower end of the large connecting pipe (2) forms a closed structure through a large connecting pipe sealing plate (4), and one end of the small connecting pipe (7) forms a closed structure through a small connecting pipe sealing plate (3).
4. The low-voltage bushing leakage test tool in the gas-insulated transformer according to claim 1, characterized in that: one end of the connecting pipe (12) is connected to the small connecting pipe (7), and the other end of the connecting pipe (12) is connected to the lower part of the large connecting pipe (2).
5. The low-voltage bushing leakage test tool in the gas-insulated transformer according to claim 1, characterized in that: the central lines of the large connecting pipe (2) and the small connecting pipe (7) are vertically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921915755.9U CN210664924U (en) | 2019-11-08 | 2019-11-08 | Leakage test tool for low-voltage sleeve in gas-insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921915755.9U CN210664924U (en) | 2019-11-08 | 2019-11-08 | Leakage test tool for low-voltage sleeve in gas-insulated transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210664924U true CN210664924U (en) | 2020-06-02 |
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ID=70812810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921915755.9U Active CN210664924U (en) | 2019-11-08 | 2019-11-08 | Leakage test tool for low-voltage sleeve in gas-insulated transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210664924U (en) |
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2019
- 2019-11-08 CN CN201921915755.9U patent/CN210664924U/en active Active
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