CN114151726B - Nondestructive testing tool for sealing state of seal head part of liner of hydrogen storage cylinder - Google Patents
Nondestructive testing tool for sealing state of seal head part of liner of hydrogen storage cylinder Download PDFInfo
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- CN114151726B CN114151726B CN202111390395.7A CN202111390395A CN114151726B CN 114151726 B CN114151726 B CN 114151726B CN 202111390395 A CN202111390395 A CN 202111390395A CN 114151726 B CN114151726 B CN 114151726B
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- sealing
- negative pressure
- cylinder
- inner container
- plastic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/06—Closures, e.g. cap, breakable member
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a preparation process of a hydrogen storage cylinder, in particular to a nondestructive testing tool for the sealing state of an end socket part of an inner container of the hydrogen storage cylinder. Comprising the following steps: the vacuum pump comprises a metal seal head, a plastic inner container, a vacuum pump, a negative pressure seal cover, an inner port seal cylinder, a rubber seal ring and a sealing rubber strip, wherein the metal seal head is embedded in the bottle port of the plastic inner container, the rubber seal ring at the bottom of the inner port seal cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure seal cover is arranged at the outer side of a bottle mouth, the negative pressure seal cover is connected with the vacuum pump through a pipeline, one end of the negative pressure seal cover is contacted with the metal seal head, the other end of the negative pressure seal cover is contacted with the plastic inner container, and the contact part is bonded and sealed by the sealing rubber strip. The invention can realize quick inspection, nondestructive inspection and avoid deformation influence of inflation on the inner container.
Description
Technical Field
The invention relates to a preparation process of a hydrogen storage cylinder, in particular to a nondestructive testing tool for the sealing state of an end socket part of an inner container of the hydrogen storage cylinder.
Background
The storage and transportation of hydrogen is one of key technologies which are required to break through in the development of hydrogen energy automobiles, and is a problem which is required to be solved preferentially in the development of hydrogen energy economy. The high-pressure hydrogen storage cylinder is a core component of a hydrogen storage and transportation system. The IV-type hydrogen storage bottle is a light-weight ultrahigh-pressure gas bottle which takes plastic as an inner container and takes a carbon fiber winding layer as a strength structure layer, has the working pressure of 70MPa and is a high-pressure hydrogen storage container widely used in the field of international fuel cells in recent years.
The plastic liner of the IV-type hydrogen storage cylinder is a sealing component of the cylinder and is a key point that the cylinder can realize effective and safe sealing. The plastic inner container is provided with metal sealing heads at two ends, the sealing heads are generally made of steel or aluminum alloy materials, and the sealing heads and the inner container main body are integrally formed in a rotational molding, injection molding and other modes. Because of the different shrinkage rates between the metal and the plastic and the difficult adhesion of the plastic, the joint of the sealing head and the liner becomes a high risk area for leakage.
In general, the tightness detection of the inner container adopts a method of sealing end sockets at two ends by using a tool and filling air with a certain pressure into the inner container. The existing method has the problems that firstly, the time is long, generally 2-3 hours are needed, and if the leakage point is particularly small, the leakage point is difficult to find; secondly, the leakage point is difficult to locate, and if leakage is found, whether the leakage point exists in the liner or the tool is problematic cannot be determined.
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a nondestructive testing tool for the sealing state of the sealing head part of a hydrogen storage cylinder liner, which is used for rapidly and effectively checking the sealing state of the sealing head part of the hydrogen storage cylinder liner; and the leakage point position can be effectively judged without destructive operation on the liner.
In order to solve the technical problems, the invention adopts the technical proposal
A nondestructive testing tool for sealing state of seal head part of hydrogen storage cylinder liner comprises: the vacuum pump comprises a metal seal head, a plastic inner container, a vacuum pump, a negative pressure seal cover, an inner port seal cylinder, a rubber seal ring and a sealing rubber strip, wherein the metal seal head is embedded in the bottle port of the plastic inner container, the rubber seal ring at the bottom of the inner port seal cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure seal cover is arranged at the outer side of a bottle mouth, the negative pressure seal cover is connected with the vacuum pump through a pipeline, one end of the negative pressure seal cover is contacted with the metal seal head, the other end of the negative pressure seal cover is contacted with the plastic inner container, and the contact part is bonded and sealed by the sealing rubber strip.
Further, the negative pressure sealing cover is made of colorless transparent glass or plastic.
Further, the plastic sealing head comprises white water absorbing paper which is adhered to the interface seam between the outer side plastic liner and the metal sealing head.
Further, the bottom of the inner port sealing cylinder is provided with a sealing groove and a rubber sealing ring, the upper part of the inner port sealing cylinder is provided with a baffle for positioning, and the cylinder body part is provided with an overflow groove.
The invention has the beneficial effects that
The invention can realize quick inspection, nondestructive inspection and avoid deformation influence of inflation on the inner container.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1: schematic diagram of embedded structure of plastic liner;
fig. 2: schematic diagram of the position of the sealing surface of the plastic liner;
fig. 3: the inner port sealing cylinder is structurally schematic;
fig. 4: the water level structure of the inner port sealing cylinder is schematically shown;
fig. 5: detecting a structural schematic diagram of the tool;
wherein: the sealing device comprises a metal sealing head, a 2-plastic liner, a 3-vacuum pump, a 4-negative pressure sealing cover, a 5-inner opening sealing cylinder, a 6-sealing rubber strip, a 7-rubber sealing ring, 8-white water absorbing paper, a 9-sealing rubber strip, a 10-rubber sealing ring, a 11-baffle and a 12-overflow groove.
Detailed Description
A quick nondestructive test frock for detecting hydrogen storage cylinder inner bag head position sealing state specifically includes: the vacuum pump, the negative pressure sealing cover, the inner port sealing cylinder, the rubber sealing ring and the sealing rubber strip.
In order to realize effective sealing of hydrogen, the inner container of the gas cylinder is generally embedded between the metal seal head and the plastic, and the position of the seal ring is positioned on the plastic section, as shown in fig. 1 and 2.
Further, the bottom of the inner port sealing cylinder is provided with a sealing groove and a sealing ring, the upper part of the inner port sealing cylinder is provided with a baffle plate for positioning, and the cylinder body part is provided with an overflow groove, as shown in figure 3.
Further, the negative pressure sealing cover is generally made of colorless transparent glass or plastic, the inside of the cover body is connected with the vacuum pump through a pipeline, the whole structure of the cover body is sealed, and the transparent material is convenient to observe, as shown in fig. 5.
Further, one end of the negative pressure sealing cover is contacted with the metal end socket part, the other end of the negative pressure sealing cover is contacted with the plastic liner, and the contact part is bonded and sealed by adopting a sealing rubber strip, as shown in fig. 5.
Further, the negative pressure sealing cover can cover the interface seam between the plastic liner and the metal seal head in a closed space, as shown in fig. 5.
In order to make the objects, features and advantages of the technical scheme of the present invention more obvious and comprehensible, embodiments of the technical scheme of the present invention will be described clearly and completely with reference to the accompanying drawings. It is obvious that the described embodiments are only some embodiments of the proposed solution, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The technical solutions in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings in the examples of the present invention.
Referring to fig. 5, the vacuum pump comprises a metal seal head 1, a plastic liner 2, a vacuum pump 3, a negative pressure seal cover 4, an inner opening seal cylinder 5, a seal rubber strip 6, a rubber seal ring 7, white absorbent paper 8 and a seal rubber strip 9.
The specific implementation mode is as follows:
firstly, the gas cylinder liner is vertically placed, the inner port sealing cylinder 5 is placed in the bottle mouth, the top baffle plate can contact the end face of the bottle mouth when the inner port sealing cylinder is installed in place, the inner port sealing cylinder is guaranteed not to excessively descend, and at the moment, the bottom rubber sealing ring 7 of the inner port sealing cylinder 5 is located at the bottom position of the sealing surface of the plastic liner. After the device is in place, the inner port sealing cylinder 5 is poured with dyeing water, and the liquid level requirement is higher than the boundary line, as shown in fig. 4. The inner port seal cylinder 5 is provided with an overflow groove, so that the boundary line is soaked in water. The cartridge bottom seal ring has a primary sealing effect, allowing for a small penetration, which serves to ensure that the liquid level in the cartridge does not drop below the boundary line during the test, see fig. 4.
And secondly, bonding a ring of white water absorbing paper 8 at the joint of the interface of the outer plastic liner and the metal seal head for observing the water leakage condition and the position of the leakage point.
And finally, installing a negative pressure sealing cover 4 on the outer side of the bottle mouth, wherein one end of the negative pressure sealing cover is contacted with the metal sealing head part, the other end of the negative pressure sealing cover is contacted with the plastic liner, and a sealing rubber strip 6 and a sealing rubber strip 9 are bonded at the contact part and used for forming a closed space. The other end of the pipeline on the negative pressure sealing cover 4 is connected to the vacuum pump 3.
The vacuum pump is started, negative pressure is formed in the closed space, and as the possible leakage point at the other end is positioned in the dyeing water of the inner port sealing cylinder 5, if leakage exists, the dyeing water can be sucked onto the white water absorbing paper 8 by the negative pressure through the leakage channel, so that the water leakage condition and the leakage point position can be obviously observed.
Claims (3)
1. Nondestructive testing frock of hydrogen storage cylinder inner bag head position sealing state, its characterized in that includes: the vacuum sealing device comprises a metal sealing head, a plastic inner container, a vacuum pump, a negative pressure sealing cover, an inner port sealing cylinder, a rubber sealing ring and a sealing rubber strip, wherein the metal sealing head is embedded in the bottle mouth of the plastic inner container, the rubber sealing ring at the bottom of the inner port sealing cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure sealing cover is arranged on the outer side of a bottle mouth, the inside of the negative pressure sealing cover is connected with the vacuum pump through a pipeline, one end of the negative pressure sealing cover is contacted with the metal sealing head part, the other end of the negative pressure sealing cover is contacted with the plastic inner container, the contact part is bonded and sealed by the sealing rubber strip, the bottom of the inner port sealing cylinder is provided with a sealing groove and the rubber sealing ring, a baffle is arranged on the upper part of the inner port sealing cylinder, the inner port sealing cylinder is poured with dyeing water, and the liquid level requirement is higher than a boundary line, and the boundary line is arranged at the interface seam between the inner wall of the metal sealing head and the plastic inner container.
2. The nondestructive testing tool for the sealing state of the seal head part of the liner of the hydrogen storage cylinder according to claim 1, wherein the nondestructive testing tool is characterized in that: the negative pressure sealing cover is made of colorless transparent glass or plastic.
3. The nondestructive testing tool for the sealing state of the seal head part of the liner of the hydrogen storage cylinder according to claim 1, wherein the nondestructive testing tool is characterized in that: the plastic liner is characterized by further comprising white water absorbing paper, wherein the white water absorbing paper is adhered to the interface seam of the outer side plastic liner and the metal seal head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111390395.7A CN114151726B (en) | 2021-11-23 | 2021-11-23 | Nondestructive testing tool for sealing state of seal head part of liner of hydrogen storage cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111390395.7A CN114151726B (en) | 2021-11-23 | 2021-11-23 | Nondestructive testing tool for sealing state of seal head part of liner of hydrogen storage cylinder |
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| Publication Number | Publication Date |
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| CN114151726A CN114151726A (en) | 2022-03-08 |
| CN114151726B true CN114151726B (en) | 2023-05-05 |
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| CN202111390395.7A Active CN114151726B (en) | 2021-11-23 | 2021-11-23 | Nondestructive testing tool for sealing state of seal head part of liner of hydrogen storage cylinder |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203310572U (en) * | 2013-06-03 | 2013-11-27 | 梁前进 | Aerosol can leakage detecting machine |
| CN105509975A (en) * | 2014-09-25 | 2016-04-20 | 上海金艺检测技术有限公司 | Ammonia leak detection apparatus and method for multilayer-wrapped titanium-lined thick wall container |
| CN104535273A (en) * | 2014-11-24 | 2015-04-22 | 中国核工业二三建设有限公司 | Tool for vacuum leak detection |
| CN104712906A (en) * | 2015-03-20 | 2015-06-17 | 日照兴业汽车配件有限公司 | Low-temperature insulated cylinder vacuum leakage detection tool |
| CN206036657U (en) * | 2016-07-22 | 2017-03-22 | 天津良华新能源科技有限公司 | Natural gas air leakage detection device |
| CN106124138A (en) * | 2016-08-12 | 2016-11-16 | 上海极率热能科技有限公司 | Fast accurate tubing leakage point detector and using method thereof |
| CN206459792U (en) * | 2016-12-28 | 2017-09-01 | 宁波华斯特林电机制造有限公司 | A kind of Stirling motor helium leak detection apparatus |
| CN108168802A (en) * | 2017-12-25 | 2018-06-15 | 五冶集团上海有限公司 | Container welding check device and its application method |
| CN108507732A (en) * | 2018-06-06 | 2018-09-07 | 南京鼎典科技有限公司 | A kind of automatic testing method of water-proof wire bundle |
| CN209540505U (en) * | 2018-12-28 | 2019-10-25 | 山东奥扬新能源科技股份有限公司 | A kind of cylinder liner leak detection attachment device |
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