CN113984306A - Positive pressure detection method for internal oil type metal corrugated oil conservator - Google Patents
Positive pressure detection method for internal oil type metal corrugated oil conservator Download PDFInfo
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- CN113984306A CN113984306A CN202111196218.5A CN202111196218A CN113984306A CN 113984306 A CN113984306 A CN 113984306A CN 202111196218 A CN202111196218 A CN 202111196218A CN 113984306 A CN113984306 A CN 113984306A
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- China
- Prior art keywords
- oil conservator
- corrugated oil
- corrugated
- conservator
- pipe
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000008149 soap solution Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/146—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformer Cooling (AREA)
Abstract
The invention belongs to the field of metal corrugated oil conservator detection, and particularly relates to a positive pressure detection method for an internal oil type metal corrugated oil conservator, wherein a meter valve three-way pipe is arranged at any one pipeline flange of a main connecting pipe, an exhaust pipe and an oil injection pipe, and flanges of the other two pipelines are sealed; installing a limiting clamp at the corrugated oil conservator, and arranging two or four limiting clamps at intervals towards two sides by taking the length direction of the corrugated oil conservator as the center; filling dry gas into the corrugated oil conservator through a meter valve three-way pipe until the pressure is 0.03-0.05 MPa; maintaining the pressure for 10-30 min, and observing the change condition of the pressure gauge number, wherein no change indicates that the oil conservator is complete in air tightness; the decrease in the pressure gauge value indicates a leak in the conservator. The invention can detect the tightness of all butt joints after the main connecting pipe, the exhaust pipe and the oil injection pipe of the oil conservator are completely installed, can visually detect the leakage position and take measures in time, and has the advantages of convenient operation, high detection efficiency and reliable detection result.
Description
Technical Field
The invention belongs to the field of detection of metal corrugated oil conservators, and particularly relates to a positive pressure detection method for an internal oil type metal corrugated oil conservator.
Background
At present, according to 7.2.2.3.2 vacuum sealing test in "oil conservator for transformer" of trade standard JB/T6484-2016, the oil conservator manufacturer pumps the oil conservator to vacuum degree not more than 50Pa, closes the vacuum pump valve, lasts 30min, observes that the vacuum gauge pressure rise should be less than 70Pa, after releasing the vacuum, the oil conservator should not have permanent deformation. "the tightness of the oil conservator is detected according to the requirement; because the detection space is formed by the corrugated oil conservator and each pipeline connected with the corrugated oil conservator, all pipeline flanges are fastened by adopting bolt sets, and a sealing ring is arranged in the middle. The following problems are encountered in the detection process:
1. the vacuum degree rises back to be more than 70Pa, which indicates that a leakage point possibly exists, but the detection space is negative pressure, and the leakage point cannot be found visually.
2. If the bolt group is not fastened firmly, the negative pressure detection method can also have the phenomenon of qualified detection, so that the detection result is not comprehensive.
Disclosure of Invention
Aiming at the problems of the tightness detection of the conventional oil conservator, the invention aims to provide a positive pressure detection method for an internal oil type metal corrugated oil conservator.
The purpose of the invention is realized by the following technical scheme:
the invention comprises the following steps:
step one, connecting a meter valve three-way pipe: installing a meter valve three-way pipe at the flange of any one of a main connecting pipe, an exhaust pipe and an oil injection pipe which are connected with the corrugated oil conservator, and sealing the flanges of the other two pipelines;
step two, fixing a limiting clamp: at least one limiting clamp is arranged on the corrugated oil storage cabinet along the length direction of the corrugated oil storage cabinet;
step three, inflating and pressurizing: filling dry gas into the corrugated oil conservator through the meter valve three-way pipe until the pressure in the corrugated oil conservator reaches 0.03-0.05 MPa;
step four, positive pressure detection: maintaining the pressure for 10-30 min, and observing the change condition of the pressure gauge number on the gauge valve three-way pipe, wherein no change indicates that the corrugated oil conservator is good in air tightness; if the value of the pressure gauge is reduced, the leakage of the corrugated oil conservator is indicated.
Wherein: and in the second step, two or four limiting clamps are arranged in the range of 200-700 mm from the length direction of the corrugated oil conservator to two sides by taking the length direction of the corrugated oil conservator as a center.
And adjusting the forming size of the limiting clamp in the second step according to the specification of the corrugated oil conservator, wherein the width adjusting range is 400-1500 mm, and the height adjusting range is 500-2000 mm.
In the fourth step, if the corrugated oil conservator leaks, a soap solution method is adopted to search a leakage point.
The invention has the advantages and positive effects that:
the invention can detect the tightness of all butt joints after the main connecting pipe, the exhaust pipe and the oil injection pipe of the oil conservator are completely installed, can visually detect the leakage position and take measures in time, and has the advantages of convenient and clean operation, high detection efficiency and reliable detection result.
Drawings
FIG. 1 is a flow chart of the detection of the present invention;
FIG. 2 is a schematic structural view of the oil conservator of the present invention in a testing state;
wherein: 1 is ripple oil conservator, 2 is the oiling pipe, 3 is the table valve three-way pipe, 4 is main connecting pipe, 5 is limit clamp, 6 is the blast pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
Step one, connecting a meter valve three-way pipe 3: as shown in fig. 1 and 2, a meter valve three-way pipe is installed at a flange of any one of a main connecting pipe 4, an exhaust pipe 6 and an oil filling pipe 2 connected with a corrugated oil conservator 1 (the meter valve three-way pipe 3 of the embodiment is installed at the flange of the oil filling pipe 2 first), and flanges of the other two pipes are sealed;
step two, fixing a limiting clamp 5: a square limiting clamp 5 is arranged at the corrugated oil conservator 1, and four limiting clamps 5 are arranged at intervals of 300mm from two sides by taking the length direction of the corrugated oil conservator 1 as the center; the limiting clamp 5 can be adjusted according to the specification of the corrugated oil conservator 1, the width is 950mm, and the height is 1220 mm;
step three, inflating and pressurizing: dry gas (air can be filled into the corrugated oil conservator 1 through a meter valve three-way pipe 3 until the pressure in the corrugated oil conservator 1 reaches 0.04 MPa;
step four, positive pressure detection: and maintaining the pressure for 10min, and observing the change condition of the pressure gauge number on the gauge valve three-way pipe 3, wherein no change indicates that the air tightness of the corrugated oil conservator 1 is good.
Example two
Step one, connecting a meter valve three-way pipe 3: as shown in fig. 1 and 2, a meter valve three-way pipe is installed at a flange of any one of a main connecting pipe 4, an exhaust pipe 6 and an oil filling pipe 2 connected with a corrugated oil conservator 1 (the meter valve three-way pipe 3 of the embodiment is installed at the flange of the oil filling pipe 2 first), and flanges of the other two pipes are sealed;
step two, fixing a limiting clamp 5: a square limiting clamp 5 is arranged at the corrugated oil conservator 1, and four limiting clamps 5 are arranged at intervals of 450mm from two sides by taking the length direction of the corrugated oil conservator 1 as the center; the limiting clamp 5 can be adjusted according to the specification of the corrugated oil conservator 1, the width is 1100mm, and the height is 1540 mm;
step three, inflating and pressurizing: dry gas (air can be filled into the corrugated oil conservator 1 through a meter valve three-way pipe 3 until the pressure in the corrugated oil conservator 1 reaches 0.05 MPa;
step four, positive pressure detection: maintaining the pressure for 20min, observing the change condition of the pressure gauge value on the three-way pipe 3 of the gauge valve, wherein the decrease of the pressure gauge value indicates the leakage of the corrugated oil conservator 1, and searching the leakage point by adopting a soap solution method.
EXAMPLE III
Step one, connecting a meter valve three-way pipe 3: as shown in fig. 1 and 2, a meter valve three-way pipe is installed at a flange of any one of a main connecting pipe 4, an exhaust pipe 6 and an oil filling pipe 2 connected with a corrugated oil conservator 1 (the meter valve three-way pipe 3 of the embodiment is installed at the flange of the oil filling pipe 2 first), and flanges of the other two pipes are sealed;
step two, fixing a limiting clamp 5: a square limiting clamp 5 is arranged at the corrugated oil conservator 1, and four limiting clamps 5 are arranged at intervals of 600mm from two sides by taking the length direction of the corrugated oil conservator 1 as the center; the limiting clamp 5 can be adjusted according to the specification of the corrugated oil conservator 1, the width is 1200mm, and the height is 2000 mm;
step three, inflating and pressurizing: dry gas (air can be filled into the corrugated oil conservator 1 through a meter valve three-way pipe 3 until the pressure in the corrugated oil conservator 1 reaches 0.03 MPa;
step four, positive pressure detection: and maintaining the pressure for 30min, and observing the change condition of the pressure gauge number on the gauge valve three-way pipe 3, wherein no change indicates that the air tightness of the corrugated oil conservator 1 is good.
In view of the corrugated oil conservator 1 in the internal oil type metal corrugated oil conservator is a flexible body, a limit clamp 5 is required to be additionally arranged, and the requirement of positive pressure detection can be met. The limiting clamp 5 of the present invention is prior art and will not be described herein.
While embodiments of the invention have been illustrated and described, it is to be understood, as noted above, that the invention is not limited to the forms disclosed, but is not intended to be exhaustive or to exclude other embodiments, and that various other combinations, modifications, and environments may be used, and changes may be made within the scope of the inventive concept described herein, by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A positive pressure detection method for an internal oil type metal corrugated oil conservator is characterized in that: comprises the following steps
Step one, connecting a meter valve three-way pipe: installing a meter valve three-way pipe at the flange of any one of a main connecting pipe, an exhaust pipe and an oil injection pipe which are connected with the corrugated oil conservator, and sealing the flanges of the other two pipelines;
step two, fixing a limiting clamp: at least one limiting clamp is arranged on the corrugated oil storage cabinet along the length direction of the corrugated oil storage cabinet;
step three, inflating and pressurizing: filling dry gas into the corrugated oil conservator through the meter valve three-way pipe until the pressure in the corrugated oil conservator reaches 0.03-0.05 MPa;
step four, positive pressure detection: maintaining the pressure for 10-30 min, and observing the change condition of the pressure gauge number on the gauge valve three-way pipe, wherein no change indicates that the corrugated oil conservator is good in air tightness; if the value of the pressure gauge is reduced, the leakage of the corrugated oil conservator is indicated.
2. The positive pressure detection method for the internal oil type metal corrugated oil conservator according to claim 1, characterized in that: and in the second step, two or four limiting clamps are arranged in the range of 200-700 mm from the length direction of the corrugated oil conservator to two sides by taking the length direction of the corrugated oil conservator as a center.
3. The positive pressure detection method for the internal oil type metal corrugated oil conservator according to claim 1, characterized in that: and adjusting the forming size of the limiting clamp in the second step according to the specification of the corrugated oil conservator, wherein the width adjusting range is 400-1500 mm, and the height adjusting range is 500-2000 mm.
4. The positive pressure detection method for the internal oil type metal corrugated oil conservator according to claim 1, characterized in that: in the fourth step, if the corrugated oil conservator leaks, a soap solution method is adopted to search a leakage point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196218.5A CN113984306A (en) | 2021-10-14 | 2021-10-14 | Positive pressure detection method for internal oil type metal corrugated oil conservator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196218.5A CN113984306A (en) | 2021-10-14 | 2021-10-14 | Positive pressure detection method for internal oil type metal corrugated oil conservator |
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| Publication Number | Publication Date |
|---|---|
| CN113984306A true CN113984306A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111196218.5A Pending CN113984306A (en) | 2021-10-14 | 2021-10-14 | Positive pressure detection method for internal oil type metal corrugated oil conservator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680166A (en) * | 2012-05-22 | 2012-09-19 | 西安飞机工业（集团）有限责任公司 | Pressure measuring joint of liquid pipeline |
| CN106500924A (en) * | 2016-10-10 | 2017-03-15 | 广西电网有限责任公司电力科学研究院 | A kind of leak hunting method of metal corrugated oil conservater |
| CN107907278A (en) * | 2017-10-30 | 2018-04-13 | 广西电网有限责任公司电力科学研究院 | A kind of method for conducting leak test of power transformer oil conservater capsule |
-
2021
- 2021-10-14 CN CN202111196218.5A patent/CN113984306A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680166A (en) * | 2012-05-22 | 2012-09-19 | 西安飞机工业（集团）有限责任公司 | Pressure measuring joint of liquid pipeline |
| CN106500924A (en) * | 2016-10-10 | 2017-03-15 | 广西电网有限责任公司电力科学研究院 | A kind of leak hunting method of metal corrugated oil conservater |
| CN107907278A (en) * | 2017-10-30 | 2018-04-13 | 广西电网有限责任公司电力科学研究院 | A kind of method for conducting leak test of power transformer oil conservater capsule |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国工业和信息化部: "中华人民共和国机械行业标准 变压器用储油柜", vol. 6484, 30 April 2017, 机械工业出版社, pages: 1 - 11 * |
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