CN105135207B - A kind of composite plastic inner bag in accumulating gas cylinder and preparation method thereof - Google Patents
A kind of composite plastic inner bag in accumulating gas cylinder and preparation method thereof Download PDFInfo
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- CN105135207B CN105135207B CN201510440522.8A CN201510440522A CN105135207B CN 105135207 B CN105135207 B CN 105135207B CN 201510440522 A CN201510440522 A CN 201510440522A CN 105135207 B CN105135207 B CN 105135207B
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Abstract
A kind of composite plastic inner bag in accumulating gas cylinder and preparation method thereof, solve the metal bottle head sealing difference of composite plastic inner bag and inner bag fills the technical problem of easy hot-spot, the technical scheme of use is that the structure of the inner bag includes tubular plastic bottle, compound end socket and winding layer, the structure of the compound end socket includes the metal bottle head with heavy shoulder, the plastic end enclosure being connected by the location structure set on heavy shoulder with metal bottle head, plastic end enclosure welds to form integral structure with tubular plastic bottle, the outer wall for the metal bottle stopper being preset in bottle with the inwall of metal bottle head there is interference fit to realize that expansion chuck is tightly connected.The present invention realizes effective sealing of plastic inner container fiber-wound gas cylinder, by sealing surface in the middle part of metal bottle stopper and end plug afterbody inverted cone surface, realizes dual-seal.
Description
Technical field
The present invention relates to composite plastic inner bag in a kind of accumulating gas cylinder and preparation method thereof, belong to pressure cylinder
Technical field, it is particularly a kind of that there is corrosion-resistant, high voltage bearing composite plastic inner bag and preparation method thereof.
Background technology
With the continuous development of new energy technology, matched resource equipment storaging and transport technology also also obtains considerable in recent years
Development, also it is significantly increased for containing the demand of the energy medium particularly pressure cylinder of gas medium both at home and abroad, but current state
The gas cylinder that interior market is applied to gases at high pressure accumulating is mostly that all-metal and the fiber winding with metal inner tube strengthen gas cylinder, unit weight
Than low, and there is inner wall corrosion in metal inner tube, and plastic inner container winds bottle due to combining high-performance fiber and special plastic
The characteristics of, there is higher volume to weight ratio, corrosion-resistant, had broad application prospects in energy medium accumulating.
But due to the needs of strength and stiffness, plastic inner container winding bottle must use metal material design bottleneck, and use
Suitable Shooting Technique needs to rationally design metal component structure, solves engagement problems between metal material and plastic inner container, simultaneously
Because the plastic inner container capacity of heat transmission is poor, the problems such as being also easy to produce electrostatic, should also try one's best when avoiding gas filling gas cylinder, plastic inner container with
The direct contact of high velocity air.
In domestic patent achievement, partial monopoly solves the engagement problems of bottleneck metalwork and plastic inner container well,
But the sealing problem of bottleneck metalwork is still without being well solved, and but still suffers from and fill air-flow and may exist with plastic inner container
Porch directly contacts, hot-spot and the problem of produce a large amount of electrostatic when causing the plastic inner container to fill.
The content of the invention
The present invention provides composite plastic inner bag in a kind of accumulating gas cylinder and preparation method thereof, solves composite plastic
Expect that the metal bottle head sealing difference of inner bag and inner bag fill the technical problem of easy hot-spot, by using embedded with conical metal bottle
Plug solve metal bottle head sealing difference technical problem, by extend to the metal bottle stopper inside bottle avoid fill gas when
The technical problem of high pressure gas and hot-spot caused by inner bag friction.
The present invention is to realize that the technical scheme that goal of the invention uses is：
A kind of composite plastic inner bag in accumulating gas cylinder, the structure of the inner bag include tubular plastic bottle,
Compound end socket and winding layer, it is important to：The structure of the compound end socket includes the metal bottle head with heavy shoulder, by heavy shoulder
The plastic end enclosure that the location structure of upper setting is connected with metal bottle head, plastic end enclosure weld to form integral type with tubular plastic bottle
Structure, the outer wall for the metal bottle stopper being preset in bottle with the inwall of metal bottle head there is tight fit to realize that expansion chuck sealing connects
Connect.
A kind of preparation method of composite plastic inner bag, stock is included the step of methods described, is prepared respectively with heavy shoulder
Metal bottle head, metal bottle stopper and fastening accessory, it is important to：Also include in the step of methods described：
A, tubular plastic bottle is prepared,
B, metal bottle head is inserted in rotational moulding or injection mold cavity, and is filled with die cavity melting HDPE raw materials, after cooling with
Metal bottle head is integrally molded so as compound end socket,
C, the compound end socket of sweat soldering and tubular plastic bottle, and metal bottle stopper is preset in cylinder,
D, winding layer is set outside shaping inner bag.
The present invention realizes effective sealing of plastic inner container fiber-wound gas cylinder, by sealing surface in the middle part of metal bottle stopper and end
Afterbody inverted cone surface to be filled in, realizes dual-seal, end plug is installed on the inside of gas cylinder, in addition to sidewall sealing surface, in continuous screwing operations, tail
The extruding of portion's inverted cone surface, make to be brought into close contact between plastic inner container and metalwork, during long-term use of, will not be received because of material
There is the problem of plastics and metalwork composition surface opening in contracting, end socket deformation, in addition, mounting means from inside to outside, also causing should
When being pressurized, end plug can increase structure with pressure, and become increasingly tighter, so as to realize that gas cylinder is reliable, effectively seals；It is another
Aspect, end plug run through bottleneck, and the plastic material at bottleneck position is completely covered, and are allowed to separate with inlet and outlet air-flow, avoid high speed gas
Stream directly washes away with plastic material, the problem of avoiding plastic inner container hot-spot and produce a large amount of electrostatic.
The present invention is described in detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation of metal bottle stopper.
Fig. 2 is the structural representation of metal bottle head.
Fig. 3 is the structural representation of the present invention (winding layer does not indicate).
In accompanying drawing, 1 is plastic bottle body, and 2 be metal bottle head, and 2-1 is heavy shoulder, and 2-2 is sealing internal thread, and 2-3 is that metal is close
Front cover, 2-4 are detents, and 2-5 is positioning hole, and 3 be metal bottle stopper, and 3-1 is sealing wedge surface, and 3-2 is air filling and exhausting hole, and 3-3 is
Mudhole, 3-4 are sealing external screw threads, and 3-5 is O-ring seal, and 3-6 is positioning table, and 4 be plastic end enclosure, and 5 be fastening accessory.
Embodiment
A kind of composite plastic inner bag in accumulating gas cylinder, the structure of the inner bag include tubular plastic bottle 1,
Compound end socket and winding layer, it is important to：The structure of the compound end socket includes the metal bottle first 2 with heavy shoulder 2-1, by
The plastic end enclosure 4 that the location structure set on heavy shoulder 2-1 is connected with metal bottle first 2, plastic end enclosure 4 weld with tubular plastic bottle 1
Connecing to form integral structure, the outer wall for the metal bottle stopper 3 being preset in bottle has with the inwall of metal bottle first 2 to be fitted close,
Realized that expansion chuck is tightly connected by inwall during internal pressure with metal bottle first 2.
Wherein winding layer uses carbon fiber.
Detent 2-4 is provided with along the endpiece of first 2 axial inwall of metal bottle, the plastic material of plastic end enclosure 4, which is wrapped in, to be determined
Smooth plastic seal face is formed outside the groove 2-4 of position, and plastic seal face and the inwall of plastic end enclosure 4 connect in integrated seamless
Connect.
The first 2 axial inwall epimere of metal bottle is provided with sealing internal thread 2-2, stage casing is designed with metallic sealing section 2-3.
The heavy shoulder 2-1 of the metal bottle first 2 is provided with positioning hole 2-5, and the heavy shoulder of plastic material parcel of plastic end enclosure 4 is simultaneously filled out
Fill positioning hole, be located by connecting with metal bottle first 2.
The endpiece of the metal bottle stopper 3 is provided with matches somebody with somebody with the plastic seal face of the first 2 inwall endpiece of metal bottle in expansion chuck sealing
The cone seal wedge surface 3-1 of conjunction.
The outer wall leading portion of the metal bottle stopper 3 is provided with sealing external screw thread 3-4, stage casing is provided with O-ring seal 3-5；The taper
Close wedge surface 3-1 conical surface length is 50~100mm, and cone angle is 9~15 °.
There are air filling and exhausting hole 3-2 and mudhole 3-3 along metal bottle stopper 3 is axially arranged, extend to inside bottle.
Also include fastening accessory 5 in the structure of the compound end socket, fastening accessory 5 is determined with what the front end of metal bottle stopper 3 was set
Position platform 3-6 is fixedly connected；The positioning table 3-6 is provided with external screw thread, and fastening accessory 5 is clamp nut, and is borrowed with positioning table 3-6
Help threaded connection.
It is a kind of to include stocking up, prepare band respectively with the supporting preparation method of composite plastic inner bag, the step of methods described
There are heavy shoulder 2-1 metal bottle first 2, metal bottle stopper 3 and fastening accessory 5, it is characterised in that：Also include in the step of methods described：
A, tubular plastic bottle 1 is prepared,
B, metal bottle first 2 is inserted in rotational moulding or injection mold cavity, and is filled with die cavity melting HDPE raw materials, after cooling with
Metal bottle first 2 is integrally molded so as compound end socket,
C, the compound end socket of sweat soldering and tubular plastic bottle 1, and metal bottle stopper 3 is preset in cylinder,
D, winding layer is set outside shaping inner bag.
The specific steps of the step A include：
A1, feed material plastics pipe inserted into pultrusion in extruding equipment into the homogeneous pipe that wall thickness is 10~20mm, wherein processing pipe
Material temperature degree is 200~300 DEG C,
The homogeneous pipe of length is as tubular plastic bottle 1 needed for A2, interception；
In the step B, injection parameterses include granule heating temperature be 200~300 DEG C, injection pressure be 100~
200Mpa；
In the step C, hot melting temperature needed for sweat soldering is 200~300 DEG C, and hot melt pressure is 2~6Mpa.
Compound end enclosure structure is designed at least as including three parts in the present invention：Metal bottle stopper 3, metal bottle first 2 and and metal
The plastic end enclosure 4 that bottle first 2 is combined closely, it is mainly characterized by being designed with screw connection structure, metal sealing in first 2 inner side of metal bottle
Face and the forming surface of plastic material, metal bottle stopper 3 then run through whole bottleneck, the external thread part of the leading portion of metal bottle stopper 3 from inside to outside
Divide the metallic sealing section of metal bottle first 2 corresponding with the sealing plane of the connection of the internal thread of metal bottle first 2, stage casing and be designed with sealing
Cushion rubber, back segment are designed to the sealing wedge surface of plastic end enclosure 4 in being interference fitted and attaching inverted cone-shaped structure, by revolving metal bottle stopper
3, the inner mold face of the inverted cone surface extruding plastic inner container of metal bottle stopper 3 is may be such that, reaches the purpose of sealing.Metal bottle stopper in the present invention
Primary sealing member of the position as winding inner container bottle, metal bottle set air inlet/outlet beyond the Great Wall, and tail end is in bell shape, extension
To bottle.
The specific embodiment of the present invention, because pressure is higher, the bottleneck connecting portion of end socket uses metal material, plastics
End socket part is molded as one with metal bottle head, is main structural components, and the compound takeshapes of closure and installation process are：First
Metal bottle first 3 and tubular plastic bottle 1 are made, plastic end enclosure 4 is molded over by metal bottle first 3 by injection or rotational molding technique afterwards
On, metal bottle stopper is then passed through into bottleneck on the inside of end socket, is connected through a screw thread and is fastened on metal bottle head, will finally fasten spiral shell
Mother, outside bottle head, it is fastened on the screw thread of end plug stretching；Then compound end socket and tubular plastic bottle 1 are subjected to thermofussion welding
Connect.
Specifically, the making of plastic inner container is divided into：The injection molding, interior of the pultrusion, head members of cylinder section plastic tube
Three key steps of welding fabrication of courage.
First, the pultrusion of cylinder section plastic tube：The pultrusion of plastic tube is carried out on special extruding equipment, pultrusion
During shaping, 200~300 DEG C of materials in the tube temperature.Then, end socket injection molding：End socket injection molding flow includes：End socket connects containing metal
Head, metal joint is preset in die cavity before injection, then injected melting HDPE raw materials in die cavity, cooling aftershaping is compound
End socket, metal bottle stopper and clamp nut are installed, end socket metalwork processes the processing for including metal joint, end plug, clamp nut, its
Middle injection parameterses include 200~300 DEG C of granule heating temperature, 100~200Mpa of injection pressure.Finally, inner bag welding fabrication：Cut
The pipe fitting of suitable length is taken as the cylinder section part of composite cylinder liner, by the way of sweat soldering, by tubular plastic bottle 1
With compound end socket welding fabrication, wherein welding parameter includes hot melting temperature：200~300 DEG C, hot melt pressure：2~6Mpa.
The key point of composite cylinder liner is in the present invention：End plug in end socket metalwork both plays sealing function, simultaneously
Also plastic end enclosure position is compressed, in the production phase, end socket injection molding rear end plug is installed in place, and is completed end socket and is welded with cylinder section
After connecing, end socket end plug it is inadvisable go out, the fixation of end plug is realized by clamp nut.
Claims (8)
1. the composite plastic inner bag in a kind of accumulating gas cylinder, the structure of the composite plastic inner bag includes tubular plastic
Bottle (1), compound end socket and winding layer, it is characterised in that：The structure of the compound end socket is included with heavy shoulder (2-1)
Metal bottle head (2), the plastic end enclosure (4) being connected by the location structure set on heavy shoulder (2-1) with metal bottle head (2), plastics
End socket (4) forms integral structure with tubular plastic bottle (1) welding, and it is fixed to be provided with along the endpiece of metal bottle head (2) axial inwall
Position groove (2-4), the plastic material of plastic end enclosure (4) are wrapped in detent (2-4) and form smooth plastic seal face outside, and
Plastic seal face is connected with the inwall of plastic end enclosure (4) in integrated seamless, the outer wall for the metal bottle stopper (3) being preset in bottle
With the inwall of metal bottle head (2) there is tight fit to realize that expansion chuck is tightly connected, the plastic end enclosure (4) and the metal bottle
Head (2) is integrally formed；The endpiece of the metal bottle stopper (3) is provided with the plastic seal face of metal bottle head (2) inwall endpiece in swollen
The cone seal wedge surface (3-1) that compact form sealing coordinates, the plastic seal face is matched somebody with somebody with the cone seal wedge surface (3-1) for interference
Close.
2. the composite plastic inner bag in a kind of accumulating gas cylinder according to claim 1, it is characterised in that：The gold
Category bottle head (2) axial inwall epimere is provided with sealing internal thread (2-2), stage casing is designed with metallic sealing section (2-3).
3. the composite plastic inner bag in a kind of accumulating gas cylinder according to claim 1 or 2, it is characterised in that：Institute
The heavy shoulder (2-1) for stating metal bottle head (2) is provided with positioning hole (2-5), and the heavy shoulder of plastic material parcel of plastic end enclosure (4) is simultaneously filled
Positioning hole, it is located by connecting with metal bottle head (2).
4. the composite plastic inner bag in a kind of accumulating gas cylinder according to claim 1, it is characterised in that：The gold
The outer wall leading portion of category bottle stopper (3) is provided with sealing external screw thread (3-4), stage casing is provided with O-ring seal (3-5)；The cone seal wedge surface
The conical surface length of (3-1) is 50~100mm, and cone angle is 9~15 °.
5. the composite plastic inner bag in a kind of accumulating gas cylinder according to claim 1 or 2, it is characterised in that：Edge
Metal bottle stopper (3) is axially arranged air filling and exhausting hole (3-2) and mudhole (3-3).
6. the composite plastic inner bag in a kind of accumulating gas cylinder according to claim 1 or 2, it is characterised in that：Institute
Stating also includes fastening accessory (5) in the structure of compound end socket, the positioning table that fastening accessory (5) is set with metal bottle stopper (3) front end
(3-6) is fixedly connected；The positioning table (3-6) is provided with external screw thread, and fastening accessory (5) is clamp nut, and with positioning table (3-
6) by threaded connection.
7. a kind of supporting preparation method of composite plastic inner bag described in claim 1, the step of the preparation method in wrap
Stock is included, the metal bottle head (2) with heavy shoulder (2-1), metal bottle stopper (3) and fastening accessory (5), its feature is prepared respectively and exists
In：Also include in the step of methods described：
A, tubular plastic bottle (1) is prepared,
B, metal bottle head (2) is inserted in rotational moulding or injection mold cavity, and is filled with die cavity melting HDPE raw materials, after cooling with gold
Category bottle head (2) is integrally molded so as compound end socket, and the compound end socket includes metal bottle head (2) and plastic end enclosure (4), the plastics
End socket (4) forms plastic seal face by the detent (2-4) of the endpiece of the metal bottle head (2)；
C, the compound end socket of sweat soldering and tubular plastic bottle (1), and metal bottle stopper (3) is preset in cylinder, the metal
The taper contract face (3-1) that the endpiece of bottle stopper (3) is set is fitted close with the plastic seal face in expansion chuck；
D, winding layer is set outside shaping inner bag.
8. preparation method according to claim 7, it is characterised in that the specific steps of the step A include：A1, by original
Material plastic tube inserts homogeneous pipe of the pultrusion into wall thickness for 10~20mm in extruding equipment, wherein processing materials in the tube temperature is 200~300
DEG C,
The homogeneous pipe of length is as tubular plastic bottle (1) needed for A2, interception；
In the step B, it is 200~300 DEG C that injection parameterses, which include granule heating temperature, and injection pressure is 100~200Mpa；
In the step C, hot melting temperature needed for sweat soldering is 200~300 DEG C, and hot melt pressure is 2~6Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510440522.8A CN105135207B (en) | 2015-07-24 | 2015-07-24 | A kind of composite plastic inner bag in accumulating gas cylinder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510440522.8A CN105135207B (en) | 2015-07-24 | 2015-07-24 | A kind of composite plastic inner bag in accumulating gas cylinder and preparation method thereof |
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| CN105135207A CN105135207A (en) | 2015-12-09 |
| CN105135207B true CN105135207B (en) | 2018-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4206516A4 (en) * | 2020-08-28 | 2024-02-28 | Yapp Automotive Systems Co Ltd | High-pressure composite container |
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| CN106870930A (en) * | 2017-02-17 | 2017-06-20 | 安徽绿动能源有限公司 | A kind of manufacture method of LPG gas cylinders |
| EP3366975B1 (en) * | 2017-02-23 | 2021-12-29 | Nproxx B.V. | Pole cap with pressure connection element for pressure vessels |
| CN107339599A (en) * | 2017-08-11 | 2017-11-10 | 天津安易达复合气瓶有限公司 | A kind of nonmetallic inner bag winds composite cylinder and its manufacture method entirely |
| JP7044003B2 (en) * | 2018-07-25 | 2022-03-30 | トヨタ自動車株式会社 | High pressure tank |
| EP3666496B1 (en) * | 2018-12-10 | 2022-04-13 | Magna Energy Storage Systems GesmbH | Method for producing a plastic tank |
| CN110594574A (en) * | 2019-09-29 | 2019-12-20 | 陶展鹏 | Gas steel cylinder |
| FR3106192B1 (en) * | 2020-01-15 | 2023-11-24 | Faurecia Systemes Dechappement | Tank, particularly for hydrogen, with improved sealing |
| CN114484258A (en) * | 2022-02-18 | 2022-05-13 | 北京化工大学 | IV-type high-barrier plastic-metal end socket structure |
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| EP0550951B1 (en) * | 1992-01-10 | 1995-11-15 | Technical Products Group, Inc. | Improved boss for a filament wound pressure vessel |
| DE102009015964A1 (en) * | 2009-04-02 | 2010-10-07 | Kunststoffverarbeitung Koetke Gmbh | Pressure vessel blank as well as process and blow molding station for its production |
| AU2009347608A1 (en) * | 2009-06-08 | 2012-01-12 | C.T.S. S.P.A. | Collar for high-pressure bottles and process for its construction |
| US9091395B2 (en) * | 2010-03-10 | 2015-07-28 | GM Global Technology Operations LLC | Process for forming a vessel |
| CN202024082U (en) * | 2011-03-31 | 2011-11-02 | 杭州余杭獐山钢瓶有限公司 | Bottle opening of plastic inner liner full-winding gas bottle |
| DE102014103390B4 (en) * | 2013-03-14 | 2019-07-04 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Seal assembly and the seal assembly comprising pressure vessel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4206516A4 (en) * | 2020-08-28 | 2024-02-28 | Yapp Automotive Systems Co Ltd | High-pressure composite container |
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