CN108871689A - A kind of high sensitivity vacuum leak detector - Google Patents
A kind of high sensitivity vacuum leak detector Download PDFInfo
- Publication number
- CN108871689A CN108871689A CN201810738135.6A CN201810738135A CN108871689A CN 108871689 A CN108871689 A CN 108871689A CN 201810738135 A CN201810738135 A CN 201810738135A CN 108871689 A CN108871689 A CN 108871689A
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- Prior art keywords
- vacuum
- cover
- leak detector
- high sensitivity
- pressure
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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
- G01M3/04—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention is a kind of highly sensitive vacuum leak detector, including vacuum shade assembly, vacuum-pumping system and the accurate control assembly of pressure, wherein：The vacuum shade assembly includes vacuum cover and sealing strip, is connected with seal groove along the open end edge circumferential direction of the vacuum cover, and the sealing strip is arranged in seal groove, and viewing glass is equipped on the outside of the sealing strip；The vacuum-pumping system includes vacuum pump, and the vacuum pump is connected to vacuum cover by corresponding tracheae and intake valve, for vacuumizing；The accurate control assembly of pressure includes pressure regulator valve and high-precision vacuum table, and the pressure regulator valve and high-precision vacuum table are set on vacuum cover, is respectively used to adjust and observe the intracorporal pressure value of vacuum (-tight) housing.Apparatus of the present invention reduce weight of equipment, improve the sensitivity of leak detection and the reliability of device and operability, reduce reviewer's labor intensity.
Description
Technical field
The invention belongs to the technical field of nondestructive testing such as nuclear power, Aeronautics and Astronautics, automobile, high-speed rail, conventional power plant, specifically relate to
And a kind of highly sensitive vacuum leak detector.
Background technique
Conventional lossless detection vacuum leak detector product material uses cast aluminium, and equipment self-weight is overweight；Radioactive pollution
It is very heavy using inconvenient to carry under environment, also it is not easy to decontamination；Observation window is narrow, and daylighting is insufficient, at the scene using also needing list
Solely with illumination；Sealing strip is several sections and pieces together, and has connector, is easy gas leakage, and poor sealing, holding pressure control is unstable, leak detection
Interference signal is more in the process, is not easy to distinguish flaw indication, and sensitivity is not high, and execute-in-place is inconvenient, is easy missing inspection；And it is external
It is difficult to be evacuated pipeline installing and dismounting, is not easy to replace, seriously affects the use of nondestructive personnel scene, reduces detection speed, shadow
Ring detection quality, it is therefore necessary to design that a kind of novel portable is light-weight, leak detection sensitivities are high vacuumizes leakage detection apparatus.
The present invention proposes a kind of vacuum leak detector, the disadvantage for overcoming above-mentioned existing product test object single, and can
By checked object size custom-made, it is fabricated to the special-shaped cover for adapting to various checked objects, such as：Check L-type, convex, triangle
Etc. various special-shaped weld seams and slab construction.
Summary of the invention
The object of the present invention is to overcome the problems of the prior art, provides a kind of highly sensitive vacuum leak detector,
Weight of equipment is reduced, the sensitivity of leak detection, the reliability of equipment and operability are improved, reduces reviewer's labor intensity.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme：
A kind of high sensitivity vacuum leak detector, including vacuum shade assembly, vacuum-pumping system and the accurate control assembly of pressure,
In：
The vacuum shade assembly includes vacuum cover and sealing strip, and the open end edge circumferential direction along the vacuum cover is connected with
Seal groove, the sealing strip are arranged in seal groove, and viewing glass is equipped on the outside of the sealing strip；
The vacuum-pumping system includes vacuum pump, and the vacuum pump is connected to vacuum (-tight) housing by corresponding tracheae and intake valve
Body, for vacuumizing；
The accurate control assembly of pressure includes pressure regulator valve and high-precision vacuum table, and the pressure regulator valve and high-precision vacuum table are set
It is placed on vacuum cover, is respectively used to adjust and observe the intracorporal pressure value of vacuum (-tight) housing.
Further, the vacuum cover is cuboid stainless steel structure, and four of the cuboid stainless steel structure
Corner is formed by complete cycle argon arc welding welding.
Further, the seal groove is welded on vacuum cover by way of the firm weldering of more discontinuous points.
Further, the viewing glass uses explosion-proof tempering white glass.
Further, muffler is equipped at the pressure regulator valve.
Further, the vacuum (-tight) housing body side surface is equipped with operating handle.
Further, the outside of the viewing glass is equipped with secondary light source.
Further, the secondary light source is slidingly arranged on a guide rail, and the guide rail is set to below vacuum cover.
The beneficial effects of the invention are as follows:
1, apparatus of the present invention can reach the standards such as ASME, RCC-M and NB/T47013 rule by being precisely controlled to pressure-regulating valve
The leak detection dwell time of items required by model and pressure requirements.
2, light-weight, it can be used under various complex environments, especially under radioactive pollution environment, avoid radioactivity dirt
Dye object is deflated valve and is picked up suspension in the sky, and the interior pollution risk of personnel's sucking can be washed with water, clean effect is good.
3, structure is simple, and anticorrosion, reliability and operability are high, easy to maintain and carrying.
4, the various accessories such as readily replaceable vacuum cover related valve, pressure gauge, connector, tracheae, glass, scalability
It is good.
5, sealing strip is placed in seal groove, will not be fallen off because taking out negative pressure and be caused vacuum decay.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is vacuum cover structural schematic diagram of the invention；
Fig. 3 is that the present invention carries out vacuum tank leak detection schematic diagram；
Fig. 4 is that the present invention carries out test plate (panel) or weld seam leak detection signal.
Figure label explanation：1, vacuum cover, 2, sealing strip, 3, seal groove, 4, viewing glass, 5, vacuum pump, 6, gas
Pipe, 7, intake valve, 8, pressure regulator valve, 9, high-precision vacuum table, 10, muffler, 11, operating handle, 12, secondary light source, 13, lead
Rail, 14, display liquid, 15, vacuum tank detected pieces, 16, test plate (panel) or weld seam detected pieces.
Specific embodiment
It is below with reference to the accompanying drawings and in conjunction with the embodiments, next that the present invention will be described in detail.
Shown in referring to Figures 1 and 2, a kind of high sensitivity vacuum leak detector, including vacuum shade assembly, vacuum-pumping system
With the accurate control assembly of pressure, wherein：
The vacuum shade assembly includes vacuum cover 1 and sealing strip 2, and the open end edge circumferential direction along the vacuum cover 1 is solid
It is connected to seal groove 3, the sealing strip 2 is arranged in seal groove 3, will not fall off during leak detection, sets to reach leakage detection apparatus
For sealing requirements, viewing glass 4 is equipped on the outside of the sealing strip 2；
The vacuum-pumping system includes vacuum pump 5, and the vacuum pump 5 is connected to vacuum by corresponding tracheae 6 and intake valve 7
Cover 1, for vacuumizing；
The accurate control assembly of pressure includes pressure regulator valve 8 and high-precision vacuum table 9, the pressure regulator valve 8 and high-precision negative pressure
Table 9 is set on vacuum cover 1, is respectively used to adjust and observe the pressure value in vacuum cover 1.
The vacuum cover 1 is cuboid stainless steel structure, and four corners of the cuboid stainless steel structure pass through
Complete cycle argon arc welding welding is formed.
The seal groove 3 is welded on vacuum cover 1 by way of the firm weldering of more discontinuous points.
The viewing glass 4 uses explosion-proof tempering white glass, and compressive resistance and perspective daylighting work well.
Muffler 10 is equipped at the pressure regulator valve 8.
1 side of vacuum cover is equipped with operating handle 11.
The outside of the viewing glass 4 is equipped with secondary light source 12.
The secondary light source 12 is slidingly arranged on a guide rail 13, and the guide rail 13 is set to 1 lower section of vacuum cover.
The principle of the invention
Firstly, vacuumizing the principle of leak detection is：When leak hole two sides are there are when pressure difference, probe gas just pass through leak hole from high pressure side to
Low-pressure side flowing, if having display liquid in low-pressure side（Such as water, fluorocarbon oil, alcohol）, would be possible to blow afloat one by one at leak hole
Bubble, shows the position of leak rate size and leak hole, to find leak hole.
As shown in Figure 3 and Figure 4, be to use vacuum leak detector of the present invention, to vacuum tank and to test plate (panel) or weld seam into
Row leak detection, observation show the bubble rule in liquid 14.
Specific leak detection process is as follows：
1, examined workpiece size, surface illuminance are measured：(>1000Lx)；Surface temperature：It must be within the scope of 4~520C；
2, standard test piece and detected pieces surface are cleaned；Foaming agent is uniformly coated on standard test piece (hole 0.05mm)；Buckle vacuum
Cover 1 is allowed to be fitted in standard test piece surface；After adjusting pressure regulator valve 8 makes vacuum degree reach standard requirements pressure -0.02MPa, stop
It stays 10 seconds, and observes, occur if any continuous air bubbles, then detection sensitivity reaches requirement, can carry out next step detection, otherwise
Continue to vacuumize, surely empty pump to -0.05MPa, stop 30 seconds and observe, if has continuous air bubbles appearance, to be tried in standard
Piece has continuous air bubbles appearance that can carry out next step detection；
3, foaming agent is uniformly coated on detected pieces surface；Vacuum cover 1 is buckled, is allowed to be bonded detected pieces surface；Vacuum degree reaches-
It after 0.02MPa, stops 10 seconds, and observe, continues to vacuumize, surely empty pump to -0.05MPa, stop 30 seconds and observe, often
The test of one adjacent area, the placement of vacuum cover 1 should at least guarantee to have that 50mm's is overlapping covered, avoid missing inspection；
4, there is continuous bubble to occur on detected pieces surface, mean that the leakage of penetrability, record the position of leakage point；
5, vacuum pump is closed, vent valve is opened, removes vacuum (-tight) housing；
6, it can be carried out sensitivity by the 2nd article of process to review；
7, it post-processes：Inspection area is rinsed well or wiped clean with water.
In specific application, apparatus of the present invention, which are configurable on band camera Remote Control Automaticization trolley, realizes long-range inspection,
The environment that can be unable to reach under radioactive environment with people realizes long-range leak detection.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of high sensitivity vacuum leak detector, which is characterized in that including vacuum shade assembly, vacuum-pumping system and pressure essence
True control assembly, wherein：
The vacuum shade assembly includes vacuum cover（1）And sealing strip（2）, along the vacuum cover（1）Open end edge
Circumferential direction is connected with seal groove（3）, the sealing strip（2）It is arranged in seal groove（3）It is interior, the sealing strip（2）Outside is equipped with observation
Glass pane（4）；
The vacuum-pumping system includes vacuum pump（5）, the vacuum pump（5）Pass through corresponding tracheae（6）And intake valve（7）
It is connected to vacuum cover（1）, for vacuumizing；
The accurate control assembly of pressure includes pressure regulator valve（8）With high-precision vacuum table（9）, the pressure regulator valve（8）With it is high-precision
Spend vacuum table（9）It is set to vacuum cover（1）On, it is respectively used to adjust and observe vacuum cover（1）Interior pressure value.
2. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the vacuum cover（1）For length
Cube stainless steel structure, and four corners of the cuboid stainless steel structure are formed by complete cycle argon arc welding welding.
3. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the seal groove（3）By more
The mode of the firm weldering of discontinuous point is welded on vacuum cover（1）On.
4. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the viewing glass（4）It adopts
With explosion-proof tempering white glass.
5. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the pressure regulator valve（8）Place is equipped with
Muffler（10）.
6. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the vacuum cover（1）Side
Equipped with operating handle（11）.
7. high sensitivity vacuum leak detector according to claim 1, which is characterized in that the viewing glass（4）'s
Outside is equipped with secondary light source（12）.
8. high sensitivity vacuum leak detector according to claim 7, which is characterized in that the secondary light source（12）Sliding
Ground is set to a guide rail（13）On, the guide rail（13）It is set to vacuum cover（1）Lower section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738135.6A CN108871689A (en) | 2018-07-06 | 2018-07-06 | A kind of high sensitivity vacuum leak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738135.6A CN108871689A (en) | 2018-07-06 | 2018-07-06 | A kind of high sensitivity vacuum leak detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108871689A true CN108871689A (en) | 2018-11-23 |
Family
ID=64299690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810738135.6A Pending CN108871689A (en) | 2018-07-06 | 2018-07-06 | A kind of high sensitivity vacuum leak detector |
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| Country | Link |
|---|---|
| CN (1) | CN108871689A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883618A (en) * | 2019-04-16 | 2019-06-14 | 中国五冶集团有限公司 | Groove tank bottom plate leak test vacuum box structure and test method |
| CN111272329A (en) * | 2020-03-20 | 2020-06-12 | 杭州科技职业技术学院 | Product suction detection structure for automatic detection line of dust collector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884173Y (en) * | 2006-02-14 | 2007-03-28 | 沪东中华造船(集团)有限公司 | Vacuum sealing means |
| CN201285339Y (en) * | 2008-11-14 | 2009-08-05 | 上海宝钢化工有限公司 | Vacuum leakage detector for tank bottom |
| CN201569547U (en) * | 2009-10-20 | 2010-09-01 | 重庆市特种设备质量安全检测中心 | Vacuum adsorption leak detecting device |
| CN203163947U (en) * | 2013-02-05 | 2013-08-28 | 成都科创佳思科技有限公司 | Portable building waterproof sealing negative pressure detection device |
| CN106500922A (en) * | 2016-11-02 | 2017-03-15 | 上海理工大学 | Tank bottoms weld joint vacuum detects box |
| CN206192592U (en) * | 2016-11-29 | 2017-05-24 | 中国化学工程第三建设有限公司 | A vacuum chamber that is used for basin welding seam gas tightness to detect |
| CN207197744U (en) * | 2017-09-13 | 2018-04-06 | 苏州热工研究院有限公司 | A kind of helium leak detection device for pond stainless steel clad can in nuclear power generating sets control zone |
-
2018
- 2018-07-06 CN CN201810738135.6A patent/CN108871689A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884173Y (en) * | 2006-02-14 | 2007-03-28 | 沪东中华造船(集团)有限公司 | Vacuum sealing means |
| CN201285339Y (en) * | 2008-11-14 | 2009-08-05 | 上海宝钢化工有限公司 | Vacuum leakage detector for tank bottom |
| CN201569547U (en) * | 2009-10-20 | 2010-09-01 | 重庆市特种设备质量安全检测中心 | Vacuum adsorption leak detecting device |
| CN203163947U (en) * | 2013-02-05 | 2013-08-28 | 成都科创佳思科技有限公司 | Portable building waterproof sealing negative pressure detection device |
| CN106500922A (en) * | 2016-11-02 | 2017-03-15 | 上海理工大学 | Tank bottoms weld joint vacuum detects box |
| CN206192592U (en) * | 2016-11-29 | 2017-05-24 | 中国化学工程第三建设有限公司 | A vacuum chamber that is used for basin welding seam gas tightness to detect |
| CN207197744U (en) * | 2017-09-13 | 2018-04-06 | 苏州热工研究院有限公司 | A kind of helium leak detection device for pond stainless steel clad can in nuclear power generating sets control zone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883618A (en) * | 2019-04-16 | 2019-06-14 | 中国五冶集团有限公司 | Groove tank bottom plate leak test vacuum box structure and test method |
| CN111272329A (en) * | 2020-03-20 | 2020-06-12 | 杭州科技职业技术学院 | Product suction detection structure for automatic detection line of dust collector |
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Application publication date: 20181123 |