CN104535273A - Tool for vacuum leak detection - Google Patents
Tool for vacuum leak detection Download PDFInfo
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- CN104535273A CN104535273A CN201410682398.1A CN201410682398A CN104535273A CN 104535273 A CN104535273 A CN 104535273A CN 201410682398 A CN201410682398 A CN 201410682398A CN 104535273 A CN104535273 A CN 104535273A
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- leak hunting
- vacuum leak
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Abstract
The invention provides a tool for vacuum leak detection, belongs to the technical field of lossless detection, and aims at solving the problem that leakage point detection for a welded joint of different materials is low in efficiency. The tool comprises a tool body; the tool body is provided with an arched opening which penetrates through the two side surfaces of the tool body, and during use, the arched opening is clamped on welding pipelines or arc plates to be detected, so that a sealing space is formed between the internal of the tool body and the welding pipelines or arc plates to be detected; the tool body is provided with an observation port, the observation port is provided with a transparent plate in a sealed manner; the tool body is provided with a vacuum meter; and the tool body is connected with a vacuumizing device. The tool of the invention can improve the leakage point detection efficiency for the welded joint of different materials.
Description
Technical field
The invention belongs to the technical field of Non-Destructive Testing, be specifically related to a kind of instrument for vacuum leak hunting.
Background technology
The welding of foreign material refers to two or more metal of different chemical composition, different tissues performance, is welded into the component of regulation designing requirement under certain process conditions, and makes the joint of welding meet the requirement of use.The weldability of foreign material depends on the factor such as institutional framework, physical and chemical performance of bi-material.Due to the singularity of welding dissimilar materials, method for welding is usually used to weld foreign material.Soldering utilizes liquid solder to fill mother metal play movement, and liquid solder and the counterdiffusion of mother metal phase are to realize the method being connected weldment.By the impact of various factors, after having welded, between liquid solder and mother metal, may leak source be there is, if there is leak source will affect the steadiness connected between weldment, therefore need between tracer liquid solder and mother metal namely commissure whether to there is leak source.In nuclear island installation work, the commissure detecting foreign material (such as copper pipe and carbon steel pipe) soldering is needed whether to there is leak source, whether the commissure that current working-yard uses the method for ray detection to come testing pipes or arc usually exists leak source, but for the soldered seam of foreign material, because foreign material (such as copper pipe and carbon steel pipe) is different with the attenuation coefficient of solder to ray, the standard of existing ray detection method and program can not be used to test, must according to real work need carry out program composition, research ray detection scheme, purchase the work such as special image quality indicator, at least to spend the time of one month, so just delay the progress of engineering, reduce the efficiency of work.
Summary of the invention
In order to the problem that the weld seam leak source detection efficiency solving welding dissimilar materials is low, the present invention proposes a kind of instrument for vacuum leak hunting, the efficiency detected with the weld seam leak source improving foreign material.
Instrument for vacuum leak hunting of the present invention, comprise body, this body is provided with the arc opening of through described body two sides, during use, this arc opening is stuck on welded pipe line to be detected or arc, makes described body interior and welded pipe line to be detected or arc form seal cavity; Described body is provided with observation panel, and this observation panel is provided with transparent panel hermetically; Described body is provided with vacuum meter; Described body is connected with vacuum extractor.
Wherein, the arc opening of described body arc radius is on two side faces different.
Wherein, described body is provided with variable valve.
Wherein, the junction of described transparent panel and described observation panel is provided with sealing joint strip.
Wherein, described arc opening is provided with sealing joint strip.
Wherein, described transparent panel is organic glass.
Wherein, described vacuum means is set to vacuum pump or air pump.
Use the method for existing ray detection to detect the weld seam of welding dissimilar materials and whether there is leak source, must according to real work need carry out program composition, research ray detection scheme, purchase the work such as special image quality indicator, at least to spend the time of one month.Make an instrument for vacuum leak hunting of the present invention and only need time half a day.Tool operation for vacuum leak hunting of the present invention is simple and convenient, is first coated in by gas-development agent on the welding joint of welded pipe line to be tested or arc; Above the pipeline that two sides being provided with arc opening of instrument of the present invention are stuck in welding or arc, above the pipeline making instrument of the present invention cover on welding hermetically or arc; The present invention is connected with vacuum extractor, uses vacuum extractor to be evacuated by the seal cavity of the inside of instrument of the present invention and pipeline to be detected or arc formation; Rotating regulation valve again, the air pressure of the seal cavity regulating inside of the present invention and pipeline to be detected or arc to be formed, the air pressure of the seal cavity inside of instrument of the present invention and pipeline to be detected or arc formed is adjusted to-0.086Mpa, the air pressure of seal cavity of vacuum meter for measuring inside of the present invention and pipeline to be detected or arc and being formed; Observation panel finally by instrument of the present invention observes the position of welding joint, sees if there is bubble and produces, if do not have bubble to produce, illustrate that the weldquality of welding meets the requirements, weld seam does not have leak source; If there is bubble to produce, illustrates that the weldquality of welding is undesirable, in weld seam, have leak source.Use instrument Site Detection weld seam of the present invention whether to have leak source only to need 10 minutes, ensure that construction speed, improve work efficiency, also save cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the instrument for vacuum leak hunting of the present invention;
Fig. 2 is the schematic front view of the instrument for vacuum leak hunting of the present invention;
Fig. 3 is the schematic top plan view of the instrument for vacuum leak hunting of the present invention shown in Fig. 2;
Fig. 4 is the elevational schematic view of the instrument for vacuum leak hunting of the present invention shown in Fig. 2;
Fig. 5 is the using state figure of the instrument for vacuum leak hunting of the present invention.
Embodiment
Fig. 1 is the schematic perspective view of the instrument for vacuum leak hunting of the present invention, Fig. 2 is the schematic front view of the instrument for vacuum leak hunting of the present invention, Fig. 3 is the schematic top plan view of the instrument for vacuum leak hunting of the present invention shown in Fig. 2, Fig. 4 is the elevational schematic view of the instrument for vacuum leak hunting of the present invention shown in Fig. 2, Fig. 5 is the using state figure of the instrument for vacuum leak hunting of the present invention, introduces instrument of the present invention in detail below in conjunction with Fig. 1-Fig. 5.
Instrument for vacuum leak hunting of the present invention comprises body 18.Body 18 comprises the first fixed head 10, second fixed head 11, three web joints 14, two clamps 17.First fixed head 10 and the second fixed head 11 are two opposite flanks of body 18; Body 18 is provided with the arc opening of through first fixed head 10 and the second fixed head 11, the arc radius of this arc opening on the first fixed head 10 is greater than the arc radius of this arc opening on the second fixed head 11, because use the welding method of socket joint soldering, two pipelines of welding or two arcs, the radius of a pipeline or arc is greater than the radius of another pipeline or arc, the pipeline that arc opening on first fixed head 10 is larger with radius or arc coordinate, and the pipeline that the arc opening on the second fixed head 11 is less with radius or arc coordinate.For using other welding method, the pipeline of welding or the radius of arc identical time, the arc radius of arc opening on the first fixed head 10 is set to equal with the arc radius of arc opening on the second fixed head 11.Arc opening on arc opening on first fixed head 10 and the second fixed head 11 is respectively equipped with sealing joint strip.Three web joints 14 are three sides of body 18, three web joints 14 connect the position that the first fixed head 10 and the second fixed head 11, three web joints 14 are connected with the first fixed head 10 and the second fixed head 11 respectively and lay respectively at the both sides of arc opening and the top of arc opening.Clamp 17 is fixed on the side of arc opening, and connect the first fixed head 10, second fixed head 11 and web joint 14, clamp 17 is provided with sealing joint strip, the form fit of the shape of clamp 17 and the welding joint of welded pipe line to be tested or arc, for the welding method using socket joint soldering, two pipelines of welding or two arcs, the radius of a pipeline or arc is greater than the radius of another pipeline or arc, the shape of clamp 17 is the notch cuttype with the form fit of the welding joint of welded pipe line or arc, the width of clamp 17 side is greater than the width of the relative side of clamp 17, for using other welding method, the pipeline of welding or the radius of arc identical time, clamp 17 is the structure with the cuboid of the form fit of the welding joint of welded pipe line or arc.When using instrument of the present invention, above the pipeline that the first fixed head 10 and the second fixed head 11 are stuck in welding or arc, instrument of the present invention is covered on above welded pipe line or arc hermetically.Body 18 of the present invention is not limited to the structure comprising first fixed head 10, second fixed head 11, three web joints 14 and two clamps 17 described in the present embodiment, as long as the structure that the inside of body 18 and welded pipe line to be detected or arc can be made to form seal cavity can both realize function of the present invention, all belong to the scope of technical scheme of the present invention.
Body 18 is provided with observation panel 16, observation panel 16 is provided with transparent panel, the inside of body 18 can be seen through observation panel 16, transparent panel can be the material that can bear certain pressure that simple glass or organic glass etc. are transparent, preferred use organic glass, because instrument of the present invention in use can produce certain pressure, organic glass not easily breaks at this pressure, can protect operating personnel; The junction of transparent panel and observation panel 16 is provided with sealing joint strip, is tightly connected to make transparent panel and observation panel 16.
Body 18 is connected with vacuum extractor (not shown), and vacuum extractor can be vacuum pump or air pump etc., for being evacuated by the seal cavity of the inside of body 18 and pipeline to be detected or arc formation.Body 18 is provided with adapter 12, adapter 12 is for being connected with vacuum extractor, one end that adapter 12 is connected with vacuum extractor is notch cuttype, can guarantee adapter 12 and the sealing of vacuum extractor junction like this, avoid the situation that adapter 12 and vacuum extractor junction leak gas to occur.
Body 18 is provided with variable valve 15, and this variable valve 15 is for regulating the air pressure of the seal cavity of the inside of body 18 and welded pipe line to be detected or arc formation.
Body 18 is provided with vacuum meter 13, the air pressure of seal cavity of vacuum meter 13 for measuring the inside of body 18 and welded pipe line to be detected or arc and being formed.
Preferably, the first fixed head 10, second fixed head 11, three web joints 14, two clamps 17 by argon arc welding together.
Fig. 5 is the using state figure of the instrument for vacuum leak hunting of the present invention, when using instrument of the present invention, the first step, coat gas-development agent at the welding joint place of the first pipeline 19 to be tested and second pipe 20, wherein the radius of the first pipeline 19 is greater than the radius of second pipe 20, second step, by tool cover of the present invention on the first pipeline 19 and second pipe 20, arc opening on first fixed head 10 coordinates with the first pipeline 19, first fixed head 10 is stuck in above the first pipeline 19, arc opening on second fixed head 11 coordinates with second pipe 20, and the second fixed head 11 is stuck in above second pipe 20, arc opening on arc opening on first fixed head 10 and the second fixed head 11 is provided with sealing joint strip, and the first fixed head 10 and the first pipeline 19, second fixed head 11 are tightly connected with second pipe 20, two clamps 17 are stuck in above the first pipeline 19 and second pipe 20, because the radius of the first pipeline 19 is greater than the radius of second pipe 20, so the joint of the first pipeline 19 and second pipe 20 is structures of notch cuttype, the form fit of the shape of clamp 17 and the welding joint of the first pipeline 19 and second pipe 20, clamp 17 is also the structure of notch cuttype, and the width of side is greater than the width of relative side, clamp 17 is provided with sealing joint strip, and clamp 17 and the first pipeline 19 and second pipe 20 are tightly connected, thus make instrument of the present invention cover on above the first pipeline 19 and second pipe 20 hermetically, 3rd step, uses vacuum extractor to be evacuated by the seal cavity of the inside of instrument of the present invention and pipeline to be detected or arc formation, 4th step, rotating regulation valve 15, the air pressure of the seal cavity regulating the inside of instrument of the present invention and pipeline to be detected or arc to be formed, until the pointer on vacuum meter 13 points to the position of-0.086Mpa, the air pressure of the seal cavity namely inside of instrument of the present invention and pipeline to be detected or arc formed is adjusted to-0.086Mpa, because according to RCC-M 2007 standard criterion of the construction of nuclear power station, after nuclear power station runs, the welding joint place one side of welded pipe line or arc is standard atmospheric pressure, another side is the air pressure of-0.086Mpa, the air pressure of the seal cavity inside of instrument of the present invention and pipeline to be detected or arc formed is adjusted to-0.086Mpa, the environment that the postrun reality of nuclear power station uses can be simulated like this, under certain working pressure, Welded Joints is tested, the accuracy of inspection can be improved, ensure that welding joint meets request for utilization, 5th step, whether by observation panel 16, observe on welding joint and have bubble to produce, if there is bubble to produce, illustrate that weld seam welding quality meets the requirements, weld seam does not have leak source, if there is bubble to produce, illustrates that weld seam welding quality is undesirable, in weld seam, have leak source.
Use the method for existing ray detection to detect the weld seam of foreign material and whether there is leak source, must according to real work need carry out program composition, research ray detection scheme, purchase the work such as special image quality indicator, at least to spend the time of one month.Make an instrument for vacuum leak hunting of the present invention and only need time half a day, the tool operation for vacuum leak hunting of the present invention is simple and convenient, and whether Site Detection weld seam has leak source, only need 10 minutes, ensure that construction speed, improve work efficiency, simultaneously also cost-saving.The radius of the arc opening on the first fixed head 10 of instrument of the present invention can be equal or different from the radius of the arc opening on the second fixed head 11, the form fit of the welding joint of clamp 17 and welded pipe line to be tested or arc, makes instrument of the present invention can be applicable to the equal or different situation of the radius of pipeline or the arc welded.The leak source that instrument of the present invention also can be used for the pipeline of same material or the welded seam of arc detects, and the leak source for the weld seam of same material pipeline or arc detects and provides another detection mode.
Claims (7)
1. the instrument for vacuum leak hunting, it is characterized in that, comprise body, this body is provided with the arc opening of through described body two sides, during use, this arc opening is stuck on welded pipe line to be detected or arc, makes described body interior and welded pipe line to be detected or arc form seal cavity; Described body is provided with observation panel, and this observation panel is provided with transparent panel hermetically; Described body is provided with vacuum meter; Described body is connected with vacuum extractor.
2. the instrument for vacuum leak hunting according to claim 1, is characterized in that, the arc opening arc radius on two side faces of described body is different.
3. the instrument for vacuum leak hunting according to claim 1, is characterized in that, described body is provided with variable valve.
4. the instrument for vacuum leak hunting according to claim 1, is characterized in that, the junction of described transparent panel and described observation panel is provided with sealing joint strip.
5. the instrument for vacuum leak hunting according to claim 1, is characterized in that, described arc opening is provided with sealing joint strip.
6. the instrument for vacuum leak hunting according to claim 1, is characterized in that, described transparent panel is organic glass.
7. the instrument for vacuum leak hunting according to claim 1, is characterized in that, described vacuum means is set to vacuum pump or air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682398.1A CN104535273A (en) | 2014-11-24 | 2014-11-24 | Tool for vacuum leak detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682398.1A CN104535273A (en) | 2014-11-24 | 2014-11-24 | Tool for vacuum leak detection |
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| Publication Number | Publication Date |
|---|---|
| CN104535273A true CN104535273A (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410682398.1A Pending CN104535273A (en) | 2014-11-24 | 2014-11-24 | Tool for vacuum leak detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949804A (en) * | 2015-05-14 | 2015-09-30 | 广西金达造船有限公司 | Forming process of vacuumizing device |
| CN108413256A (en) * | 2018-03-08 | 2018-08-17 | 中国电建集团山东电力建设有限公司 | A kind of natural gas line gas leak detection device |
| CN113776744A (en) * | 2021-08-30 | 2021-12-10 | 中国一冶集团有限公司 | Welding seam leakage detection device and method |
| CN114151726A (en) * | 2021-11-23 | 2022-03-08 | 内蒙古航天红岗机械有限公司 | Nondestructive testing tool for sealing state of end socket part of inner container of hydrogen storage cylinder |
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| CN201569546U (en) * | 2009-07-10 | 2010-09-01 | 广州中船远航船坞有限公司 | Ship weld quality vacuum testing device |
| CN201716157U (en) * | 2010-05-18 | 2011-01-19 | 江南造船(集团)有限责任公司 | Combined type pre-tightness detection device |
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| CN102721513A (en) * | 2012-06-18 | 2012-10-10 | 黄海造船有限公司 | Weld joint tightness detecting device for ship under construction |
| CN202582839U (en) * | 2012-03-13 | 2012-12-05 | 中国核工业第五建设有限公司 | Vacuum cap used for detecting welding quality of containment vessel for nuclear power station |
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2014
- 2014-11-24 CN CN201410682398.1A patent/CN104535273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201569546U (en) * | 2009-07-10 | 2010-09-01 | 广州中船远航船坞有限公司 | Ship weld quality vacuum testing device |
| CN201716157U (en) * | 2010-05-18 | 2011-01-19 | 江南造船(集团)有限责任公司 | Combined type pre-tightness detection device |
| CN202166505U (en) * | 2011-07-12 | 2012-03-14 | 浙江增洲造船有限公司 | Ship welding tightness rapid detecting device |
| CN202582839U (en) * | 2012-03-13 | 2012-12-05 | 中国核工业第五建设有限公司 | Vacuum cap used for detecting welding quality of containment vessel for nuclear power station |
| CN102721513A (en) * | 2012-06-18 | 2012-10-10 | 黄海造船有限公司 | Weld joint tightness detecting device for ship under construction |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949804A (en) * | 2015-05-14 | 2015-09-30 | 广西金达造船有限公司 | Forming process of vacuumizing device |
| CN108413256A (en) * | 2018-03-08 | 2018-08-17 | 中国电建集团山东电力建设有限公司 | A kind of natural gas line gas leak detection device |
| CN108413256B (en) * | 2018-03-08 | 2023-10-13 | 中国电建集团山东电力建设有限公司 | Natural gas pipeline leakage detection device |
| CN113776744A (en) * | 2021-08-30 | 2021-12-10 | 中国一冶集团有限公司 | Welding seam leakage detection device and method |
| CN114151726A (en) * | 2021-11-23 | 2022-03-08 | 内蒙古航天红岗机械有限公司 | Nondestructive testing tool for sealing state of end socket part of inner container of hydrogen storage cylinder |
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Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |