CN201731980U - Bell-type double-channel spray gun for helium mass spectrum leakage detection - Google Patents
Bell-type double-channel spray gun for helium mass spectrum leakage detection Download PDFInfo
- Publication number
- CN201731980U CN201731980U CN2010202218520U CN201020221852U CN201731980U CN 201731980 U CN201731980 U CN 201731980U CN 2010202218520 U CN2010202218520 U CN 2010202218520U CN 201020221852 U CN201020221852 U CN 201020221852U CN 201731980 U CN201731980 U CN 201731980U
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- bell
- helium
- leakage detection
- spray gun
- pipe body
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Abstract
The utility model relates to a leakage detection spray gun used in a helium mass spectrum leakage detection technology for detecting weld leak hole of large vessels through a helium spray method, in particular to a bell-type double-channel spray gun for helium mass spectrum leakage detection. The bell-type double-channel spray gun is characterized in that one end of a pipe body with an external bell-type suction nozzle is arranged, the other end of the pipe body is closed, a gas extraction hole is arranged on the wall of the pipe body, a gas inlet pipe with an internal bell-type spray nozzle at one end is arranged in the pipe body by taking the axis of the pipe body as a center, an gas passage is left between the outer wall of the internal bell of the spray nozzle and the inner wall of the external bell of the suction nozzle, the other end of the gas inlet pipe is fixedly connected on a sealing cover at the closed end of the pipe body, the gas inlet of the gas inlet pipe stretches out of the pipe body and the inner wall of the pipe body and the outer wall of the gas inlet pipe form an external channel. In the process of helium mass spectrum leakage detection, the spray gun can enable the concentration of helium at leak holes of the vessels to be high and stable, the leakage detection sensitivity is improved and the excessive sprayed helium can be extracted out of the leakage detection environment to prevent the excessive helium from affecting the surrounding leak holes and causing environmental pollution.
Description
Technical field
The utility model relates to and is used for spraying the leak detection spray gun that helium mass spectrometer leak detecting technology that the helium method detects bulk container weld seam small opening uses, especially for the bell-jar dual channel spray gun of helium mass spectrum leak detection.
Background technology
At present, helium mass spectrum leak detection utilizes and self regulates bolt adjusting spray helium flow amount with the many spray guns for paint that directly adopt of spray gun, takes open spray helium mode.Use this type of spray gun in the reality leak detection, owing to be subjected to the angle of the relative small opening of nozzle, distance, its shape of nozzle and the size of the relative small opening of nozzle, the factor affecting such as flow of injection helium, the concentration and the coverage of small opening place helium are difficult to determine that actual leak detection sensitivity is not high; In addition owing to the unnecessary helium that spray gun sprayed can not in time be removed, make that tested regional environment helium concentration is higher, do not spray the small opening in helium zone around having influence on, easily cause erroneous judgement the small opening position, especially at tested position texture ratio than under the complicated situation, helium is easy-clear more not.
Summary of the invention
The purpose of this utility model is to provide a kind of bell-jar dual channel spray gun that is used for helium mass spectrum leak detection, in the helium mass spectrum leak detection process, can make the concentration of container small opening place helium higher and stable, improve leak detection sensitivity, and can extract the unnecessary helium of ejection out the leak detection environment, small opening is on every side exerted an influence and avoids causing pollution to environment avoiding.
The purpose of this utility model is achieved in that a kind of bell-jar dual channel spray gun that is used for helium mass spectrum leak detection, the body that has outer bell-jar suction nozzle, its other end sealing, bleeding point is being set on tube body wall, axis with body in body is the draft tube that the center is being provided with bell-jar nozzle in the band, leave gas channel between the inwall of the outer bell jar of the outer wall of bell jar and suction nozzle in the nozzle, the other end of draft tube is fixed in the capping of body blind end, the air intake opening protruded tube of draft tube is external, and the inwall of body and the outer wall of draft tube constitute outer flow passage.
Connect helium tube on the air intake opening of draft tube of the present utility model, connect vacuum pump by pipeline on the bleeding point, flowmeter is installed respectively on the pipeline of draft tube and outer flow passage, spray helium flow amount and extraction flow are complementary by its variable valve.During work, helium enters draft tube by interior bell-jar nozzle ejection, and outer bell-jar suction nozzle extracts by the helium that is not sucked by the leak detection system of the vacuum pump of outer flow passage through connecting with the nozzle ejection.
Flowmeter is mainly used in spray helium flow amount and the extraction flow of measuring gun system, makes it under lower helium consumption situation, is in rational matching value.The utility model is selected the KT800 type transparent tube suspended body flowmeter (claiming the transparent tube spinner-type flowmeter again) in the differential pressure flowmeter for use.
The unnecessary helium that vacuum pump is mainly used in the spray gun ejection extracts the leak detection environment, avoids other leakage position is exerted an influence, and causes erroneous judgement.This gun system has been selected the 2XZ-1B of Ai Fa section sliding vane rotary pump for use.
This gun system connecting pipeline is selected for use and is oozed the extremely low PU pipe of helium, and withstand voltage is 1.4MPa.
Connecting joint is mainly used in the connection of flexible pipe between spray gun rifle body, flowmeter, helium source and the vacuum pump.This gun system adopts the locknut joint.
This gun system can make the concentration of small opening place helium higher and stable in the leak detection process, has improved leak detection sensitivity, and the unnecessary helium of ejection can be extracted the leak detection environment, small opening is on every side exerted an influence avoiding.Utilize this gun system certain vessel flange metallic seal cover weld seam to be implemented leak detection in 2008, small opening can be determined in Φ 20mm scope, more original spray gun is to the orientation range 20mm * 200mm of small opening, improved station-keeping ability greatly to small opening, and then reduced the repair welding area, improved the vessel safety performance.
Therefore the utility model is in the helium mass spectrum leak detection process, can make the concentration of container small opening place helium higher and stable, improve leak detection sensitivity, and can extract the unnecessary helium of ejection out the leak detection environment, small opening is on every side exerted an influence and avoids causing pollution to environment avoiding.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Accompanying drawing is a sectional structure synoptic diagram of the present utility model.
Embodiment
A kind of bell-jar dual channel spray gun that is used for helium mass spectrum leak detection, as shown in drawings, the body 3 that has outer bell-jar suction nozzle 2, its other end sealing, on body 3 walls, bleeding point 6 is being set, axis with body 3 in body 3 is the draft tube 4 that the center is being provided with bell-jar nozzle 1 in the band, leave gas channel between the inwall of the outer wall of bell jar and suction nozzle 2 outer bell jars in the nozzle 1, the other end of draft tube 4 is fixed in the capping of body 3 blind ends, the air intake opening of draft tube 4 stretches out outside the body 3, and the outer wall of the inwall of body 3 and draft tube 4 constitutes outer flow passage 5.Outer bell-jar suction nozzle 2 and interior bell-jar nozzle 1 constitute by rubber.
Bleeding point 6 is arranged on the front side tube wall of body 3, or bleeding point 6 is arranged on the rear side tube wall of body 3.
Claims (2)
1. bell-jar dual channel spray gun that is used for helium mass spectrum leak detection, it is characterized in that: the body (3) that has outer bell-jar suction nozzle (2), its other end sealing, on body (3) wall, bleeding point (6) is being set, axis with body (3) in body (3) is the draft tube (4) that the center is being provided with bell-jar nozzle (1) in the band, leave gas channel between the inwall of the outer wall of the interior bell jar of nozzle (1) and the outer bell jar of suction nozzle (2), the other end of draft tube (4) is fixed in the capping of body (3) blind end, the air intake opening of draft tube (4) stretches out outside the body (3), and the outer wall of the inwall of body (3) and draft tube (4) constitutes outer flow passage (5).
2. the bell-jar dual channel spray gun that is used for helium mass spectrum leak detection according to claim 1 is characterized in that: outer bell-jar suction nozzle (2) and interior bell-jar nozzle (1) constitute by rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202218520U CN201731980U (en) | 2010-06-10 | 2010-06-10 | Bell-type double-channel spray gun for helium mass spectrum leakage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202218520U CN201731980U (en) | 2010-06-10 | 2010-06-10 | Bell-type double-channel spray gun for helium mass spectrum leakage detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201731980U true CN201731980U (en) | 2011-02-02 |
Family
ID=43523138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202218520U Expired - Fee Related CN201731980U (en) | 2010-06-10 | 2010-06-10 | Bell-type double-channel spray gun for helium mass spectrum leakage detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201731980U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741271A (en) * | 2015-04-10 | 2015-07-01 | 新兴能源装备股份有限公司 | Vacuum leak-sensing exhaust type helium spray gun |
| WO2017125327A1 (en) * | 2016-01-21 | 2017-07-27 | Pfeiffer Vacuum | Spray device and leak detection module |
-
2010
- 2010-06-10 CN CN2010202218520U patent/CN201731980U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741271A (en) * | 2015-04-10 | 2015-07-01 | 新兴能源装备股份有限公司 | Vacuum leak-sensing exhaust type helium spray gun |
| WO2017125327A1 (en) * | 2016-01-21 | 2017-07-27 | Pfeiffer Vacuum | Spray device and leak detection module |
| FR3047074A1 (en) * | 2016-01-21 | 2017-07-28 | Pfeiffer Vacuum | SPRAY DEVICE AND LEAK DETECTION MODULE |
| CN108474713A (en) * | 2016-01-21 | 2018-08-31 | 普发真空公司 | Injection apparatus and leak detection module |
| EP3405763B1 (en) * | 2016-01-21 | 2019-12-04 | Pfeiffer Vacuum | Spray device and leak detection module |
| US10775259B2 (en) | 2016-01-21 | 2020-09-15 | Pfeiffer Vacuum | Spray device and leak detection module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20150610 |
|
| EXPY | Termination of patent right or utility model |