CN114151726A - Nondestructive testing tool for sealing state of end socket part of inner container of hydrogen storage cylinder - Google Patents
Nondestructive testing tool for sealing state of end socket part of inner container of hydrogen storage cylinder Download PDFInfo
- Publication number
- CN114151726A CN114151726A CN202111390395.7A CN202111390395A CN114151726A CN 114151726 A CN114151726 A CN 114151726A CN 202111390395 A CN202111390395 A CN 202111390395A CN 114151726 A CN114151726 A CN 114151726A
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- Prior art keywords
- sealing
- negative pressure
- inner container
- cylinder
- hydrogen storage
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Classifications
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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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (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. The method comprises the following steps: the vacuum sealing device comprises a metal sealing head, a plastic inner container, a vacuum pump, a negative pressure sealing cover, an inner opening sealing cylinder, a rubber sealing ring and a sealing rubber strip, wherein the metal sealing head is embedded in the bottleneck of the plastic inner container, the rubber sealing ring at the bottom of the inner opening sealing cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure sealing cover is arranged outside the bottleneck, 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 in contact with the metal sealing head, the other end of the negative pressure sealing cover is in contact with the plastic inner container, and the contact part is bonded and sealed by the sealing rubber strip. The invention can realize rapid detection, can realize nondestructive detection and avoid deformation influence on the liner caused by inflation.
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 need to be broken through in the development of hydrogen energy automobiles, and is a problem which needs to be solved preferentially in the economic development of hydrogen energy. The high-pressure hydrogen storage cylinder is a core component of a hydrogen storage and transportation system. The IV-type hydrogen storage cylinder is a light ultrahigh-pressure cylinder which takes plastic as an inner container and 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 inner container of the IV-type hydrogen storage cylinder is a sealing component of the cylinder and is the key for realizing effective and safe sealing of the cylinder. The metal end sockets are arranged at two ends of the plastic inner container, are generally made of steel or aluminum alloy and are integrally formed with the inner container main body in a rotational molding mode, an injection molding mode and the like. Due to different shrinkage rates between metal and plastic and the difficult adhesion of the plastic, the joint of the end socket and the liner becomes a high risk area for leakage.
Generally, the airtightness of the inner container is detected by 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 consumption is long, generally 2-3 hours are needed, and if the leakage point is extremely small, the leakage point is difficult to find; secondly, the leak source is difficult to locate, and if the leak is found, the leak source or the tool of the inner container 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 a liner end socket part of a hydrogen storage cylinder, which is used for quickly and effectively checking the sealing state of the liner end socket part of the hydrogen storage cylinder; and the position of the leakage point can be effectively judged without carrying out destructive operation on the inner container.
Technical scheme adopted by the invention for solving technical problem
The utility model provides a nondestructive test frock of hydrogen storage cylinder inner bag head position sealing state, includes: the vacuum sealing device comprises a metal sealing head, a plastic inner container, a vacuum pump, a negative pressure sealing cover, an inner opening sealing cylinder, a rubber sealing ring and a sealing rubber strip, wherein the metal sealing head is embedded in the bottleneck of the plastic inner container, the rubber sealing ring at the bottom of the inner opening sealing cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure sealing cover is arranged outside the bottleneck, 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 in contact with the metal sealing head, the other end of the negative pressure sealing cover is in contact with the plastic inner container, and the contact part is bonded and sealed by the sealing rubber strip.
Furthermore, the negative pressure sealing cover is made of colorless transparent glass or plastic materials.
Further, the water-absorbing liner comprises white water-absorbing paper, wherein the white water-absorbing paper is adhered to the interface seam between the outer plastic liner and the metal end enclosure.
Furthermore, the bottom of the inner opening sealing cylinder is provided with a sealing groove and a rubber sealing ring, the upper part of the inner opening sealing cylinder is provided with a baffle for positioning, and the cylinder body is provided with an overflow groove.
Advantageous effects obtained by the present invention
The invention can realize rapid detection, can realize nondestructive detection and avoid deformation influence on the liner caused by inflation.
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 not to limit the invention. In the drawings:
FIG. 1: the embedded structure of the plastic inner container is shown schematically;
FIG. 2: a schematic position diagram of a sealing surface of the plastic inner container;
FIG. 3: the inner opening sealing cylinder is schematic in structure;
FIG. 4: the water level structure of the inner opening sealing cylinder is shown schematically;
FIG. 5: a schematic structural diagram of the detection tool;
wherein: the method comprises the following steps of 1-metal end socket, 2-plastic inner container, 3-vacuum pump, 4-negative pressure sealing cover, 5-inner opening sealing cylinder, 6-sealing rubber strip, 7-rubber sealing ring, 8-white absorbent paper, 9-sealing rubber strip, 10-rubber sealing ring, 11-baffle and 12-overflow tank.
Detailed Description
The utility model provides a quick nondestructive test frock for detecting hydrogen storage cylinder inner bag head position encapsulated situation specifically includes: vacuum pump, negative pressure sealing cover, inner opening sealing cylinder, rubber seal ring, joint strip.
In order to realize effective sealing of hydrogen, the inner container of the gas cylinder generally adopts an embedded structure between the metal end enclosure and plastic, and the position of the sealing ring is located on the plastic section, as shown in fig. 1 and 2.
Furthermore, the bottom of the inner opening sealing cylinder is provided with a sealing groove and a sealing ring, the upper part of the inner opening sealing cylinder is provided with a baffle for positioning, and the cylinder body is provided with an overflow groove, as shown in figure 3.
Further, the negative pressure sealed cowling is colorless transparent glass or plastics material generally, and the cover is inside to be connected with the vacuum pump through the pipeline, and cover body overall structure itself should be sealed, see figure 5, and transparent material is convenient for observe.
Furthermore, one end of the negative pressure sealing cover is in contact with the metal end enclosure, the other end of the negative pressure sealing cover is in contact with the plastic liner, and the contact part is bonded and sealed by a sealing rubber strip, which is shown in figure 5.
Further, the negative pressure sealing cover can cover the interface between the plastic inner container and the metal end socket in a closed space, as shown in fig. 5.
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is obvious that the described embodiments are only some, not all embodiments of the proposed solution. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention.
Referring to the attached figure 5, the device comprises a metal end enclosure 1, a plastic inner container 2, a vacuum pump 3, a negative pressure sealing cover 4, an inner opening sealing cylinder 5, a sealing rubber strip 6, a rubber sealing ring 7, white absorbent paper 8 and a sealing rubber strip 9.
The specific implementation mode is as follows:
at first with the vertical place of gas cylinder inner bag, put into the bottleneck with interior mouthful of a sealed section of thick bamboo 5, the installation top baffle can contact the bottleneck terminal surface when targetting in place, guarantees that it can not excessively descend, and at this moment, the bottom rubber seal 7 of an interior mouthful of a sealed section of thick bamboo 5 is located the sealed face bottom position of plastics inner bag. After the installation is in place, dyeing water is poured into the inner opening sealing barrel 5, and the liquid level is required to be higher than the boundary line, as shown in figure 4. Since the inner opening sealing cylinder 5 is provided with the overflow groove, the boundary line is soaked in water. The cylinder bottom sealing ring has the primary sealing effect, allows for micro permeation, and has the function of ensuring that the liquid level in the cylinder does not fall below the boundary line during detection, as shown in fig. 4.
And secondly, bonding a circle of white absorbent paper 8 at the interface seam between the outer plastic liner and the metal end enclosure for observing the water leakage condition and the position of a leakage point.
And finally, installing a negative pressure sealing cover 4 outside the bottle mouth, wherein one end of the negative pressure sealing cover is in contact with the metal end enclosure, the other end of the negative pressure sealing cover is in contact with the plastic liner, and a sealing rubber strip 6 and a sealing rubber strip 9 are bonded at the contact positions to form 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, the leakage point possibly existing at the other end is located in the dyeing water of the inner opening sealing cylinder 5, if leakage exists, the dyeing water can be sucked to the white water absorption paper 8 through the leakage channel by the negative pressure, and then the water leakage condition and the leakage point position can be obviously observed.
Claims (5)
1. The utility model provides a nondestructive test frock of hydrogen cylinder inner bag head position encapsulated situation which 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 opening sealing cylinder, a rubber sealing ring and a sealing rubber strip, wherein the metal sealing head is embedded in the bottleneck of the plastic inner container, the rubber sealing ring at the bottom of the inner opening sealing cylinder is positioned at the bottom of the sealing surface of the plastic inner container, the negative pressure sealing cover is arranged outside the bottleneck, 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 in contact with the metal sealing head, the other end of the negative pressure sealing cover is in contact with the plastic inner container, and the contact part is bonded and sealed by the sealing rubber strip.
2. The nondestructive testing tool for the sealing state of the end socket part of the liner of the hydrogen storage cylinder according to claim 1, which is characterized in that: the negative pressure sealing cover is made of colorless transparent glass or plastic materials.
3. The nondestructive testing tool for the sealing state of the end socket part of the liner of the hydrogen storage cylinder according to claim 1, which is characterized in that: the water-absorbing liner is characterized by further comprising white water-absorbing paper, wherein the white water-absorbing paper is adhered to the interface seam between the outer plastic liner and the metal end enclosure.
4. The nondestructive testing tool for the sealing state of the end socket part of the liner of the hydrogen storage cylinder according to claim 1, which is characterized in that: the bottom of the inner opening sealing cylinder is provided with a sealing groove and a rubber sealing ring, the upper part of the inner opening sealing cylinder is provided with a baffle for positioning, and the cylinder body is provided with an overflow groove.
5. The nondestructive testing tool for the sealing state of the end socket part of the liner of the hydrogen storage cylinder according to claim 4, which is characterized in that: dyeing water is poured into the inner opening sealing cylinder, and the liquid level is required to be higher than the boundary line.
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 true CN114151726A (en) | 2022-03-08 |
| CN114151726B 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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| 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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2021
- 2021-11-23 CN CN202111390395.7A patent/CN114151726B/en active Active
Patent Citations (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 |
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| CN114151726B (en) | 2023-05-05 |
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