CN113217814A - Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure - Google Patents
Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure Download PDFInfo
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- CN113217814A CN113217814A CN202110657157.1A CN202110657157A CN113217814A CN 113217814 A CN113217814 A CN 113217814A CN 202110657157 A CN202110657157 A CN 202110657157A CN 113217814 A CN113217814 A CN 113217814A
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- 239000002184 metal Substances 0.000 title claims abstract description 147
- 238000007789 sealing Methods 0.000 title claims abstract description 116
- 239000001257 hydrogen Substances 0.000 claims abstract description 40
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229920003023 plastic Polymers 0.000 claims abstract description 37
- 239000004033 plastic Substances 0.000 claims abstract description 37
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 16
- 229920001903 high density polyethylene Polymers 0.000 claims description 14
- 230000007547 defect Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 abstract description 20
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
Images
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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- 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
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0311—Closure means
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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)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure which comprises a metal BOSS structure, a plastic end enclosure, a metal BOSS locking structure, a cylinder valve seat and a sealing ring. The metal BOSS structure and the plastic sealing head are coaxially arranged; the structure at the bottleneck of the plastic end closure is turned inwards; the connection end face of the BOSS structure and the plastic inner container is connected with a metal BOSS locking structure through threads; the metal BOSS locking structure locks the metal BOSS structure and the plastic end socket and is additionally provided with a sealing ring for sealing; the metal BOSS structure is connected with the bottle valve seat through threads, and the BOSS structure is sealed with the bottle valve seat through a sealing ring. The invention adopts the design of the inward-turning type plastic seal head bottle mouth, so that the plastic seal head has better deformation resistance in the rapid inflation and deflation process; the design of the structures such as the conical surface, the concave boss, the sealing ring and the like makes full use of the advantage of large pressure difference inside and outside the hydrogen storage tank, so that the plastic-metal can have better interface sealing effect even if the plastic-metal shrinks inconsistently due to the processing technology and temperature.
Description
Technical Field
The invention relates to the field of processing and forming of pressure containers and high polymer materials, in particular to an inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure.
Technical Field
The hydrogen becomes an important component of the new energy industry due to the advantages of high combustion cleanliness and high energy density, wherein the pressure hydrogen storage technology is an important part for developing new hydrogen energy. The pressure hydrogen storage technology is most widely applied to new energy automobiles, tube bundle hydrogen storage vehicles and the like. At present, the pressure hydrogen storage technology is developing towards high-pressure high-density hydrogen storage, but hydrogen has the characteristics of small molecules and easy leakage, a liner with excellent barrier capability is required to be used as a barrier layer to prevent gas leakage, the foremost hydrogen storage bottle is an IV-type polymer composite hydrogen storage bottle, and the liner is made of a polymer material. However, most of the existing gas transmission, monitoring, distribution and other pressure pipelines are made of metal materials, and if a plastic BOSS structure is directly adopted, the plastic BOSS structure is easily worn and fails due to different material properties (hardness, strength and the like), environmental factors and the like, so that one of the technical difficulties faced by the polymer composite hydrogen storage bottle is a high-strength and high-barrier connection technology of the end socket metal BOSS structure and the polymer materials. In order to meet the requirement of a high-pressure large-capacity tube bundle hydrogen storage bottle with the pressure of more than 50MPa, the development of a pressure-resistant high-barrier plastic liner end enclosure structure is very important.
The seal head structures of the plastic inner container of the existing IV-type hydrogen storage bottle are various, wherein the patent 201510440522.8 uses interference fit and labyrinth seal, the sealing effect is better, but the metal part at the bottle mouth is larger, the light weight effect is poorer, and the hydrogen storage density is low; patent 201710086665.2 uses a labyrinth seal structure, but the structural strength has a drawback when applied to high pressure hydrogen storage; patent 201910439016.5 uses a double sealing ring for sealing, which has a better sealing effect, but the bottle mouth does not structurally reinforce the plastic liner, and the end socket of the plastic liner is easily damaged when the bottle mouth is axially impacted; patent 201920773836.3 adopts labyrinth seal and screw thread seal, and strengthens the plastic liner structure of the bottle mouth, and has better bottle mouth strength; patent 201720862795.X adopts a labyrinth seal structure, but the bottle mouth structure is complex and is not easy to process; patent 2017109756818.3 adopts a conical surface thread seal and a labyrinth seal, which have good sealing effect, but also have the problem of complex structure and the like. An inward-turning type inner container end socket is also developed by Hexagon composite material company in Norway, but the inward-turning structure is a straight edge, after long-term hydrogen charging and discharging, the hydrogen can gradually cause the separation of plastic and metal on the contact surface, and the metal is hydrogen-fragile until a large amount of leakage occurs, so that the safety is affected.
Disclosure of Invention
The invention designs an inward-turning high-hydrogen-resistance plastic-metal end socket sealing structure by taking a plastic inner container of a high-pressure hydrogen storage bottle as an object, and solves the problem that a plastic-metal interface at the opening of the high-pressure hydrogen storage bottle is easy to leak. Compared with the traditional plastic liner sealing head structure for the high-pressure hydrogen storage bottle, the invention has the advantages of simple structure, good sealing effect and repeated hydrogen charging and discharging resistance, and improves the high-low pressure applicability and the environmental temperature change resistance of the plastic sealing head.
The invention relates to an inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure which comprises a metal BOSS structure, a plastic end enclosure, a metal BOSS locking structure, a cylinder valve seat and a sealing ring. The plastic end socket is of a main body structure, the metal BOSS structure is an insert, the metal BOSS locking structure and the bottle valve seat are assembly parts, and the sealing ring is a sealing element.
The metal BOSS structure is umbrella-shaped and is coaxially arranged with the end enclosure, the inner ring of the metal BOSS structure is embedded into the plastic end enclosure, and the umbrella-shaped structure is embedded to cover the bottleneck of the end enclosure and is used for increasing the stress area of the bottleneck and the BOSS structure; meanwhile, the outer end face of the umbrella-shaped structure is superposed with the outer surface of the plastic seal head, and the outer edge of the umbrella-shaped structure is in contact with the plastic seal head to strengthen radial fixation. The bottle mouth of the metal BOSS structure is provided with an annular BOSS extending outwards, the metal BOSS structure is connected with a bottle valve seat through threads, and the BOSS structure is sealed with the bottle valve seat through a sealing ring. After the sealing ring is installed, the BOSS structure and the bottle valve seat are always in a micro-deformation state due to extrusion, and the sealing effect is ensured. The connection end face of the BOSS structure and the plastic inner container is connected with a metal BOSS locking structure through threads. The metal BOSS locking structure is only connected with the BOSS structure through threads and is connected with the inner edge of the turned face in the bottleneck of the plastic liner through interference fit. The metal BOSS locking structure achieves the purpose of improving the sealing performance by respectively additionally arranging the sealing rings in the grooves connected with the BOSS structure and the inner container.
The forming mode of the inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure provided by the invention is as follows: and placing the BOSS structure as an insert in an injection molding machine to mold the plastic liner. Then, the two sealing rings are placed at the corresponding positions of the grooves of the BOSS locking structure, and the BOSS locking structure is screwed into the BOSS structure. And finally, mounting a sealing ring at the corresponding position of the bottle valve seat, and screwing the sealing ring with the BOSS structure from outside to inside along the axis.
The inward-turning high-hydrogen-resistance plastic-metal end socket sealing structure is characterized in that the structure of a bottle opening of the plastic end socket is inward turned, the contact interface between the metal BOSS structure and the inward turned edge of the end socket is an axial inner annular conical surface, and when the plastic-metal combination is not tight, the inner annular conical surface can realize the micro-sliding of the plastic-metal by utilizing the pressure difference between the inside and the outside of the gas bottle, so that the plastic-metal are tightly attached again, and the interface is more tightly attached when the pressure difference is larger.
According to the inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure, the inner annular surface of the groove of the metal BOSS locking structure can be used for increasing the on-way resistance of gas leakage, the metal material is saved, the weight is reduced, and the hydrogen storage volume in a gas cylinder is increased, and the metal BOSS locking structure preferably has a conical surface structure with the outer ring height smaller than that of the inner ring.
The inward-turning high-hydrogen-resistance plastic-metal end socket sealing structure is characterized in that an annular elastic sealing ring is additionally arranged between the metal BOSS locking structure and the end socket inward-turning structure along the axis, the sealing ring can increase gas leakage resistance, reduce hydrogen leakage at an interface between the plastic end socket and the metal BOSS locking structure, and simultaneously avoid that the end surface of a plastic liner is directly contacted with a groove of the metal BOSS locking structure to cause deformation failure of the liner in the locking process and reduce friction loss between the plastic liner bottle mouth inward-turning structure and the metal BOSS locking structure; in order to further guarantee the sealing effect between the assemblies, on the basis that the metal BOSS locking structure and the metal BOSS structure are sealed through threads, an elastic sealing ring is additionally arranged at the contact corner of the metal BOSS locking structure and the metal BOSS locking structure, and the sealing ring can prevent the end face of the metal BOSS structure from being in direct contact with the end face of the groove of the metal BOSS locking structure after micro deformation, so that the positioning defect and the friction loss between the metal BOSS structure and the metal BOSS locking structure are caused.
The inward-turning high-hydrogen-resistance plastic-metal end socket sealing structure is characterized in that a sealing ring is additionally arranged on a circumferential contact interface between the metal BOSS structure and the bottle valve seat along the inner side of the bottle opening, and the sealing ring can increase gas leakage resistance after being extruded and deformed and reduce hydrogen leakage through a contact surface between the metal BOSS structure and the bottle valve seat.
Alternatively, the sealing ring may be mounted on the end surfaces perpendicular to the axial direction of the metal BOSS structure and the cylinder valve seat, and the sealing ring is slightly deformed by the force of the screw locking when the cylinder valve seat and the metal BOSS structure are mounted, so as to improve the sealing performance.
Preferably, the contact interface between the metal BOSS structure and the cylinder valve seat is provided with a conical surface along the axial direction, and the conical surface is used for sealing, so that the gas leakage resistance is increased, and the structural stability is improved. Alternatively, a sealing ring is additionally arranged on the conical surface, and the sealing ring is slightly deformed by using the force of thread locking when the bottle valve seat and the metal BOSS structure are installed, so that the matching defect after local processing is avoided, and the sealing effect is improved.
The sealing ring material is preferably a rubber material with good compatibility with hydrogen, such as nitrile rubber, ethylene propylene diene monomer, silicon rubber and the like.
The inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure fully considers the influence of a processing technology, storage pressure, temperature and service life on material deformation. The invention adopts the inward-turning type seal head bottle mouth design and the plastic-metal interface reinforcing structure, so that the plastic seal head has better deformation resistance in the rapid inflation and deflation process; meanwhile, the invention designs structures such as a conical surface, a concave boss, a sealing ring and the like, and fully utilizes the advantage of large pressure difference between the inside and the outside of the hydrogen storage tank, so that the plastic-metal can have better interface sealing effect even if the shrinkage of the plastic-metal is inconsistent due to the processing technology and the temperature.
Drawings
FIG. 1 is a schematic structural diagram of a simple inverted high hydrogen resistant plastic-metal head sealing structure according to the present invention;
FIG. 2 is an enlarged view of FIG. 1, showing the seal ring installation at the intersection of the end socket, the BOSS metal structure and the BOSS metal locking structure;
FIG. 3 is a schematic view of a metal BOSS locking structure of an inverted high-hydrogen-resistance plastic-metal end enclosure sealing structure according to the invention;
FIG. 4 is a schematic diagram of a preferred structure of an inverted high hydrogen resistant plastic-metal end enclosure sealing structure according to the present invention, wherein a 2-1 structure is added on the basis of FIG. 1;
FIG. 5 is an enlarged view of II shown in FIG. 4;
FIG. 6 is a schematic structural diagram of a sealing ring of an inverted high-hydrogen-resistance plastic-metal end enclosure sealing structure, which is arranged on a contact interface in a direction perpendicular to an axis;
fig. 7 is a structural schematic diagram of the inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure sealing ring installed on the conical surface.
In the figure: 1-plastic end socket; 2-metal BOSS structure; 1-1-inner ring conical surface; 2-1-inner ring conical surface; 3-sealing ring; 4-metal BOSS locking structure; 5-sealing ring; 6-bottle valve seat; 7-sealing ring.
Detailed Description
The invention discloses an inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure, which comprises a plastic end enclosure 1, a metal BOSS structure 2, a sealing ring 3, a metal BOSS locking structure 4, a sealing ring 5 and a bottle valve seat 6, as shown in figure 1. The plastic seal head 1 is of a main structure, the metal BOSS structure 2 is an insert, the metal BOSS locking structure 4 and the bottle valve seat 6 are assembly parts, and the sealing ring 3 and the sealing ring 5 are sealing parts. The metal BOSS structure 2 is umbrella-shaped and is coaxially arranged with the seal head 1, the inner ring of the metal BOSS structure is embedded into the plastic seal head 1, and the umbrella-shaped structure is embedded and covers the bottleneck of the seal head; meanwhile, the outer end face of the umbrella-shaped structure is superposed with the outer surface of the plastic seal head 1. As shown in fig. 1, the bottle mouth of the metal BOSS structure is an outwardly extending circular BOSS, a bottle valve seat 6 is additionally arranged at the bottle mouth of the metal BOSS structure from top to bottom, the bottle valve seat is a concave BOSS, the metal BOSS structure 2 is in threaded connection with the bottle valve seat 6, and the BOSS structure and the bottle valve seat are sealed by a sealing ring.
The invention relates to an inward-turning high-hydrogen-resistance plastic-metal end socket sealing structure, wherein a structure 1 at the bottle mouth of a plastic end socket is turned inwards, as shown in figure 2, the contact interface of a metal BOSS structure 2 and the inward-turning edge of the end socket 1 is an inner annular conical surface 1-1 along the axial direction, the inner annular conical surface 1-1 can realize micro sliding of plastic-metal by utilizing the pressure difference between the inside and the outside of a gas bottle when the plastic-metal combination is not tight, so that the plastic-metal are tightly attached again, and the interface is more tightly attached when the pressure difference is larger.
The invention is additionally provided with a metal BOSS locking structure 4 from bottom to top, as shown in figure 2, the metal BOSS locking structure 4 locks a plastic end socket inverted structure 1 and a metal BOSS structure 2 in a concave BOSS; the metal BOSS locking structure 4 is only connected with the BOSS structure 2 through threads and is connected with the outer edge of the inner turning surface of the bottle mouth of the plastic liner 1 through interference fit; in consideration of saving metal materials, reducing weight and increasing the volume of hydrogen storage in the gas cylinder, the metal BOSS locking structure preferably has a conical surface structure with the height of an outer ring smaller than that of an inner ring; a schematic diagram of the BOSS metal locking structure 4 is shown in fig. 3.
According to the invention, the annular elastic sealing ring 3 is additionally arranged on the metal BOSS locking structure 4 and the plastic end socket inward-turning structure 1 along the axis, as shown in figure 2, the sealing ring 3 can increase the gas leakage resistance, reduce the hydrogen leakage at the interface between the plastic end socket 1 and the metal BOSS locking structure 4, and simultaneously avoid the direct contact of the end surface of the plastic liner 1 and the groove of the metal BOSS locking structure 4, so that the liner 1 is deformed and failed in the locking process, and the friction loss between the bottle mouth inward-turning structure of the plastic liner 1 and the metal BOSS locking structure 4 is reduced.
In order to further ensure the sealing effect between the assembly bodies, an elastic sealing ring 5 is additionally arranged at the contact corner of the metal BOSS locking structure 4 and the metal BOSS locking structure 2 on the basis of screw thread sealing, as shown in fig. 2, the sealing ring 5 can prevent the end face of the metal BOSS locking structure 2 from directly contacting with the groove end face of the metal BOSS locking structure 4 after micro deformation, so that the over-positioning defect and the friction loss between the metal BOSS locking structure 2 and the metal BOSS locking structure 4 are caused.
According to the invention, the sealing ring 7 is additionally arranged on the circumferential contact interface of the metal BOSS structure 2 and the cylinder valve seat 6 along the inner side of the bottle mouth, as shown in figure 1, the sealing ring 7 can increase gas leakage resistance after extrusion deformation, and hydrogen leakage through the contact surface between the metal BOSS structure 2 and the cylinder valve seat 7 is reduced.
Preferably, as shown in fig. 4 and 5, the contact interface between the metal BOSS structure 2 and the cylinder valve seat 6 is an inner annular tapered surface 2-1 along the axial direction, and the tapered surface sealing is used to increase the gas leakage resistance and the structural stability.
Alternatively, as shown in fig. 6, a seal ring 7 is additionally installed between the upper end surface of the bottle mouth structure of the metal BOSS structure and the bottle valve seat 6 along the direction perpendicular to the axis, and the seal ring is slightly deformed by the force of screw locking when the bottle valve seat 6 is installed with the metal BOSS structure 2, so that the sealing performance is improved.
Preferably, as shown in fig. 7, the gradient of the inner annular conical surface 2-1 in the axial direction between the metal BOSS structure 2 and the cylinder valve seat 6 is increased, and a seal ring 7 is additionally mounted on the inner annular conical surface 2-1, wherein the seal ring 7 can increase gas leakage resistance, wherein the seal ring is slightly deformed by the force of screw locking when the cylinder valve seat 6 and the metal BOSS structure 2 are mounted, thereby avoiding the matching defect after local processing and improving the sealing effect.
The invention relates to a specific forming mode of an inward-turning high-hydrogen-resistance plastic-metal end enclosure sealing structure, which comprises the following steps: the method comprises the steps of casting or material reducing manufacturing and forming a metal BOSS structure 2 according to a designed structural form, then placing the finished product BOSS structure 2 as an insert into an injection mold, forming a plastic end socket 1 in a mold cavity through injection molding, and then sealing and installing a metal BOSS locking structure 4 and a bottle valve seat 6 through a sealing ring 3, a sealing ring 5 and a sealing ring 7 to obtain the inverted high-hydrogen-resistance plastic-metal end socket sealing structure.
Claims (8)
1. An inverted high-hydrogen-resistance plastic-metal end socket sealing structure is characterized in that: the sealing device comprises a metal BOSS structure, a plastic end socket, a metal BOSS locking structure, a bottle valve seat and a sealing ring, wherein the plastic end socket is of a main body structure, the metal BOSS structure is an insert, the metal BOSS locking structure and the bottle valve seat are assembly parts, the sealing ring is a sealing part, the metal BOSS structure forms an umbrella shape and is coaxially arranged with the end socket, an inner ring of the metal BOSS locking structure is embedded into the plastic end socket, and the umbrella-shaped structure is embedded and covers the bottle mouth of the end socket; meanwhile, the outer end face of the umbrella-shaped structure is superposed with the outer surface of the plastic seal head, and the outer edge of the umbrella-shaped structure is in contact with the plastic seal head to strengthen radial fixation; the metal BOSS structure bottle mouth is provided with an outwardly extending circular BOSS, the metal BOSS structure is in threaded connection with a bottle valve seat, the BOSS structure is sealed with the bottle valve seat through a sealing ring, the BOSS structure is in threaded connection with the connecting end face of the plastic liner through a metal BOSS locking structure, the metal BOSS locking structure is only in threaded connection with the BOSS structure and is connected with the inner edge of the inner bottle mouth of the plastic liner through interference fit, and the metal BOSS locking structure is used for achieving the purpose of improving the sealing performance by respectively additionally installing the sealing ring in a groove connected with the BOSS structure and the liner.
2. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 1, characterized in that: the metal BOSS locking structure is in a conical surface structure, and the height of an outer ring is smaller than that of an inner ring.
3. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 2, characterized in that: an annular elastic sealing ring is additionally arranged between the metal BOSS locking structure and the end socket inward-turning structure along the axis.
4. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 2, characterized in that: on the basis that the metal BOSS locking structure and the metal BOSS structure are sealed through threads, an elastic sealing ring is additionally arranged at the contact corner of the metal BOSS locking structure and the metal BOSS structure.
5. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 2, characterized in that: the metal BOSS structure and the bottle valve seat are additionally provided with the sealing ring along the annular contact interface on the inner side of the bottle opening, the gas leakage resistance can be increased after the sealing ring is extruded and deformed, and the hydrogen leakage through the contact surface between the metal BOSS structure and the bottle valve seat is reduced.
6. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 1, characterized in that: and a sealing ring is arranged on the end surface, perpendicular to the axis direction, of the metal BOSS structure and the bottle valve seat, and the sealing ring is slightly deformed by using the force of thread locking when the bottle valve seat and the metal BOSS structure are arranged, so that the sealing performance is improved.
7. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 1, characterized in that: the contact interface of the metal BOSS structure and the bottle valve seat is provided with a conical surface along the axis direction, and the conical surface is used for sealing, so that the gas leakage resistance is increased, and the stability of the structure is improved.
8. The inverted high hydrogen resistant plastic-metal head sealing structure according to claim 7, characterized in that: the sealing ring is additionally arranged on the conical surface, and the sealing ring is slightly deformed by utilizing the force of thread locking when the bottle valve seat and the metal BOSS structure are installed, so that the matching defect after partial processing is avoided, and the sealing effect is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657157.1A CN113217814B (en) | 2021-06-11 | 2021-06-11 | Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657157.1A CN113217814B (en) | 2021-06-11 | 2021-06-11 | Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure |
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| CN113217814A true CN113217814A (en) | 2021-08-06 |
| CN113217814B CN113217814B (en) | 2024-10-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263844A (en) * | 2021-12-22 | 2022-04-01 | 华氢能源动力科技(江苏)有限公司 | Hydrogen bottle disk seat that leakproofness is strong |
| CN116557764A (en) * | 2023-05-05 | 2023-08-08 | 华南理工大学 | High-performance bottle mouth sealing structure for IV-type hydrogen storage bottle |
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| CN213018861U (en) * | 2020-07-22 | 2021-04-20 | 嵊州市浙江工业大学创新研究院 | Composite hydrogen storage cylinder with plastic inner container |
| CN213236962U (en) * | 2020-09-21 | 2021-05-18 | 浙江工业大学 | Liner and valve seat sealing connection structure suitable for IV-type hydrogen storage cylinder |
| CN216131758U (en) * | 2021-06-11 | 2022-03-25 | 北京化工大学 | Inward-turning type high-hydrogen-resistance plastic-metal seal head sealing structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263844A (en) * | 2021-12-22 | 2022-04-01 | 华氢能源动力科技(江苏)有限公司 | Hydrogen bottle disk seat that leakproofness is strong |
| CN116557764A (en) * | 2023-05-05 | 2023-08-08 | 华南理工大学 | High-performance bottle mouth sealing structure for IV-type hydrogen storage bottle |
| CN116557764B (en) * | 2023-05-05 | 2024-01-05 | 华南理工大学 | High-performance bottle mouth sealing structure for IV-type hydrogen storage bottle |
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| CN113217814B (en) | 2024-10-29 |
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