CN100410001C - Production process of high strength self-sealing composite aluminium-plastic pipe union - Google Patents

Production process of high strength self-sealing composite aluminium-plastic pipe union Download PDF

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Publication number
CN100410001C
CN100410001C CNB2006100129766A CN200610012976A CN100410001C CN 100410001 C CN100410001 C CN 100410001C CN B2006100129766 A CNB2006100129766 A CN B2006100129766A CN 200610012976 A CN200610012976 A CN 200610012976A CN 100410001 C CN100410001 C CN 100410001C
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CN
China
Prior art keywords
sealing
platform
locking
thread
conical
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CNB2006100129766A
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Chinese (zh)
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CN1887508A (en
Inventor
张天林
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张天林
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Priority to CNB2006100129766A priority Critical patent/CN100410001C/en
Publication of CN1887508A publication Critical patent/CN1887508A/en
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Publication of CN100410001C publication Critical patent/CN100410001C/en

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Abstract

The present invention is production process of high strength self-sealing composite aluminum-plastic pipe union. The production process includes producing main pipe union body and auxiliary parts, and has the specific steps of: 1. selecting stainless steel for producing pipe union; 2. machining at least one external thread on the main pipe union body, forming conic sealing stage of 3-7 deg cone apex angle, and forming end port with outer diameter greater than the inner diameter by up to 1.5 mm and height between the inner diameter and the outer diameter of the composite pipe; and 3. machining one locking stage comprising inner conic surface and outer conic surface on one end of the locking nut, with the locking stage possessing inner surface of the same cone apex angle as the outer surface of the sealing stage.

Description

A kind of preparation method of high strength self-sealing composite aluminium-plastic pipe union
Technical field
The present invention relates to manufacturing technology, a kind of specifically preparation method that can realize the PAP pipe joint of high strength connection and self sealss effect to plastic-aluminum combined pipe connected pipe fitting.
Background technology
Application development process and the domestic and international application of more than ten years facts have proved that PAP has tangible performance and price advantage as small-bore indoor application pipe, has the distinguishing feature of rust-proofing, corrosion protection.Yet the defective of the multiple tube connecting tube that exists has hindered applying of it greatly at present.
First generation bite type copper pipe joint is by turning nut, compresses split ring and reaches sealing purpose.Began later in 1997 second generation pincers-pressed type copper sleeve to occur, utilize the special vice press tool to make steel bushing produce permanent deformation, tubing is become whole with the crimping of joint core body.Advantage is sealing, safety, the installation effectiveness height, and shortcoming is to dismantle, flow resistance obviously strengthens at the pipe joint place.Ministry of Construction's process investigation recommends to use novel tubes such as plastic-aluminum pipe, has been generalized to the liquid conducting pipes system engineering fields such as hot and cold water, combustion gas, Compressed Gas, solar energy, heating, medical treatment, pure water and chemical industry in industry and the civil engineering rapidly.But the development of the technical development of domestic PAP pipe joint and plastic-aluminum pipe manufacturer industry does not match very much.What account at present main flow on market is still first generation bite type copper sleeve, also can see the steel bushing pincers-pressed type copper sleeve of the second generation simultaneously.The inventor had many improved trials on concrete structure both at home and abroad, but inevitably will adopt the rubber seal parts, to address the leakage concern.The foreign standard of the O RunddichtringO rubber that plays a crucial role in the various pipe joint requires " compression set rate " less than 20%, so be extensive use of to have pressed the better EPT rubber packing circle of sex change abroad, still can't guarantee in the installation process generation to ageing failure under the damage of this base part and the prolonged application state.And domestic still at the traditional butyronitrile rubber sealing ring of a large amount of uses, the butyronitrile rubber sealing ring can't guarantee 50 year service life at all.Steel bushing pincers-pressed type copper sleeve is a kind of advanced joint that is used for PAP at present, its connection reliability is higher, cold-resistant thermal circulation performance is better, can realize the zero leakage that the plastic-aluminum pipe connects substantially, thereby be widely used in cold and hot feedwater, heating, combustion gas field.But it still can't be accurately being held in pretension dynamics just right when connecting operation, also just can't in connection procedure, avoid damaging seal member, directly have influence on the quality and the timeliness of sealing.And copper, aluminium uses easier generation electrochemical reaction with, corrosion occurs, can not be used for having green pipeline corrosion and high to water quality requirement, as in the pipe-line systems such as combustion gas, chemical industry, pharmacy bigger restriction being arranged; Cost of manufacture is higher.
Summary of the invention
The purpose of this invention is to provide a kind of new multiple tube pipe joint design and process technology, make it under the prerequisite of omitting rubber sealing element, realize high-intensity connection and excellent sealing ability, and long-term stability; And can realize freedom, loading and unloading repeatedly and have the little feature of flow resistance.
Key Design thought of the present invention is exactly the creep surplus automatic adjustment technology under compressing by the low-angle large tracts of land cone match that the great deal of experiment data summary produces.
This method comprises that to the processing technology to pipe joint body and supporting even part, concrete step is as follows:
1. pipe joint body and supporting even part are chosen the stainless steel material processing and fabricating.
2. on two logical or threeway or the hollow tube adapter body more than the threeway, select place, a passway to process external pipe thread at least, in the setting of the top of external pipe thread and process the sealing platform that outer surface is a cone shape, the cone-apex angle of the male cone (strobilus masculinus) of control sealing platform is between the 3-7 degree, sealing you mouth external diameter is greater than the internal diameter of institute's tube connector, but be not more than 1.5mm, the sealing platform height value be selected in connect between the internal diameter and external diameter of multiple tube.
3. the even part of selecting a hexagonal locking nut conduct and main body upper exterior tube screw thread to mate, in an end setting of this nut, process a locking platform that combines by the inside and outside conical surface, make the inner surface of this locking platform have identical cone-apex angle with the outer surface of sealing platform, distance when fitting together between two conical surfaces greater than the wall thickness of the PAP that is connected, but is not more than 0.6mm in the value of the precession external pipe thread section start of locking platform.
Select for use the low-angle cone-apex angle of 3-7 degree and the taper seat of suitable height to cooperate two big cone match that form, it is key of the present invention that plastic-aluminum combined tube wall is exerted pressure.Compress the effect that is produced by the outer surface of the inner surface of the locking platform of above design and sealing platform and can reach Aluminium-plastic pipe joint resistance to compression and sealing basic demand fully.The process that screws locking nut is the process that multiple tube wall pressure power is strengthened, and is again along the outer wall of the multiple tube process of rubbing forward.The inside and outside vinyon of compound tube wall can produce strain under the effect of the power that continues to increase, the part material is wriggled to the little place of pressure.If we leave suitable groove on the sealing platform conical surface its material is flowed into, can strengthen seal on the one hand, strengthened axial anticreep ability on the other hand, make bonding strength and sealing property get a greater increase
The span that experimental results show that above vertex of a cone angle and sealing platform height is to have taken into full account harmless distortion, procedure, sealing property, frictional force to distribute numerous factors to draw section's mathematic(al) parameter through analog computation, has obtained the good effect without the high strength self-sealing under the rubber seal parts.
The embodiment that provides below in conjunction with accompanying drawing further specifies and the present invention seeks to how to realize.
Description of drawings
Fig. 1 is the structural representation of pipe joint body part.
Fig. 2 is the structural representation of the pipe joint body part of another embodiment.
Fig. 3 is the structural representation of the supporting even part locking nut of pipe joint.
Structural representation under Fig. 4 the design application state.
1 is the pipe joint body part of hollow among the figure, the 2nd, external pipe thread, the 3rd, the sealing platform, the 4th, annular calendering seal groove, the 5th, cannelure, the 6th, taper thread groove, the 7th, the hexagonal locking nut, the 8th, the locking platform, the limit of moulding of annular calendering seal groove 4 is injected in 9 representatives and one section face of cylinder of locking platform inner conical surface adjacency, 10 representatives through the calendering wriggling.11 represent the aluminium in the PAP.
The specific embodiment
From the given embodiment of accompanying drawing as can be seen, concrete step of the present invention is as follows:
1. pipe joint body and supporting even part are chosen the stainless steel material processing and fabricating,
2. at least one place, passway processes external pipe thread on two logical or threeway or the hollow tube adapter body 1 more than the threeway, in setting of the top of external pipe thread 2 and processing outer surface is the sealing platform 3 of cone shape, the cone-apex angle of the male cone (strobilus masculinus) of control sealing platform 3 is between the 3-7 degree, sealing platform 2 port outside diameter are greater than the internal diameter of institute's tube connector, but be not more than 1.5mm, the sealing platform 3 height value be selected in connect between the internal diameter and external diameter of multiple tube
3. the even part of selecting 7 conducts of a hexagonal locking nut and main body upper exterior tube screw thread 2 to mate, in an end setting of this nut, process a locking platform 8 that combines by the inside and outside conical surface, make the inner surface of locking platform 8 have identical cone-apex angle with the outer surface of sealing platform 3, distance between two conical surfaces greater than the wall thickness of the PAP that is connected, but is not more than 0.6mm in the value of precession external pipe thread 2 section starts of locking platform 8.
In order further to improve bonding strength and self sealss performance, at the middle part of sealing platform 3 conical surfaces that 2. above-mentioned steps is processed into or near the taper thread groove 6 that further processes endless groove 5 or rectangle on the position of root, this well width 2-4mm, degree of depth 0.4-0.6mm.
Above step 3. in the height of locking platform 8 be controlled to be between the 2/3-3/4 of sealing platform 3 height, the port of the inner conical surface of locking platform 8 is provided with one section high guide cylinder face 9 of 2-8mm, locking platform 8 inner conical surfaces process annular calendering seal groove 4 between hexagonal locking nut 7 Internal Pipe Threads, width is 1.5-5mm, and the degree of depth is 1-2.5mm.
The process that screws hexagonal locking nut 7 is the process that multiple tube wall pressure power is strengthened, be again along the outer wall of the multiple tube process of rubbing plastics forward, the inside and outside vinyon of compound tube wall makes the part material wriggle to the little place of pressure under the rubbing of pushing away of continuing to increase, pressure.Final injection circular trough 5 or taper thread groove 6 form and can play sealing and the ring-type of tension effect or the fin of taper thread shape.The materials flow of interference to and inject annular calendering seal groove 4 and form and mould limit 10 nut 7 that can be locked and be pressed on firmly on the passway, high strength is connected and self sealss play a key effect.
Be the better fit between the outer surface of realizing locking the inner surface of platform 8 and sealing platform 3, at least one place, passway processes the 3. corresponding coupling of Internal Pipe Thread of middle hexagonal locking nut 7 of external pipe thread and step on the hollow tube adapter body 1 of above-mentioned steps in 2., and the axial length of gas thread is between the 16-22mm.The needs that can adapt to different bore PAPs.
The main body 1 of hollow tube joint adopts in the above version of two logical or threeways or threeway, all access ports and supporting even part are all made the special-purpose connecting tube that connects between the plastic-aluminum pipe in accordance with the method for claim 1, thereby or at the main body 1 employing part common metal pipe joint port organization of hollow tube joint and the conversion connecting tube between supporting even part formation multiple tube and the common metal pipe.
When implement connecting operation, should choose supporting hexagonal locking nut 7 according to the inside and outside bore of concrete PAP and be sleeved on interface end, expand the port of institute's tube connector tapered horn-like according to the size of the sealing platform 3 of correspondence again.Insertion seals platform 3, and the horn mouth port is propped up the root that seals platform 3, hexagonal locking nut 7 is tightened get final product.The degree that applies pretightning force is as the criterion rigid resistance to occur, is easy to grasp, and can produce adverse consequences to sealing.In the locking process by the calendering of plastics is formed automatically mould limit 10, and the multiple tube inwall on protruding stupefied, make sealing, the bonding strength of joint, the raising of connection lifetime play important function.

Claims (4)

1. the preparation method of a high strength self-sealing composite aluminium-plastic pipe union, this method comprises the processing technology to pipe joint body and supporting even part, it is characterized in that concrete step is as follows:
1. pipe joint body and supporting even part are chosen the stainless steel material processing and fabricating,
2. go up at least one place, passway in two logical or threeways or the hollow tube adapter body (1) more than the threeway and process external pipe thread (2), top setting and processing outer surface at external pipe thread (2) are the sealing platform (3) of cone shape, the cone-apex angle of the male cone (strobilus masculinus) of control sealing platform (3) is between the 3-7 degree, sealing platform (3) port outside diameter greater than but be no more than the internal diameter of 1.5mm institute tube connector, the sealing platform (3) height value be selected in connect between the internal diameter and external diameter of multiple tube
3. the supporting even part of selecting a hexagonal locking nut (7) conduct and main body upper exterior tube screw thread (2) to mate, in an end setting of this nut, process a locking platform (8) that combines by the inside and outside conical surface, make the inner surface of locking platform (8) have identical cone-apex angle with the outer surface of sealing platform (3), the distance between two conical surfaces the value of the section start of locking platform (8) precession external pipe thread (2) greater than but be no more than the wall thickness of the PAP that 0.6mm connects.
2. according to the preparation method of the said high strength self-sealing composite aluminium-plastic pipe union of claim 1, it is characterized in that the middle part of sealing platform (3) conical surface that is processed into during step 2. or near the taper thread groove (6) that further processes endless groove (5) or rectangle on the position of root, this well width 2-4mm, degree of depth 0.4-0.6mm.
3. according to the preparation method of the said high strength self-sealing composite aluminium-plastic pipe union of claim 1, it is characterized in that the height of locking platform (8) was controlled to be between the 2/3-3/4 of sealing platform (3) height during step 3., the port of the inner conical surface of locking platform (8) is provided with the high one section guide cylinder face (9) of 2-8mm, locking platform (8) inner conical surface processes annular calendering seal groove (4) between hexagonal locking nut (7) Internal Pipe Thread, width is 1.5-5mm, and the degree of depth is 1-2.5mm.
4. according to the preparation method of the said high strength self-sealing composite aluminium-plastic pipe union of claim 1, it is characterized in that hollow tube adapter body described in step 2. (1) goes up at least one place, passway and processes the 3. corresponding coupling of Internal Pipe Thread of middle hexagonal locking nut (7) of external pipe thread and step, the axial length of gas thread is between the 16-22mm.
CNB2006100129766A 2006-07-21 2006-07-21 Production process of high strength self-sealing composite aluminium-plastic pipe union CN100410001C (en)

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CN100410001C true CN100410001C (en) 2008-08-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101430035B (en) * 2008-12-02 2010-10-06 浙江世进水控股份有限公司 Sliding type aluminium plastic composite pipe fittings

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CN101434021B (en) * 2007-11-12 2010-10-13 包明涛 Method for processing locknut of conical rotor motor
CN103353016B (en) * 2013-07-26 2016-03-02 福州聚升汽车销售服务有限公司 Automobile air conditioner expansion valve restorer
CN103673733B (en) * 2013-12-27 2016-01-20 无锡佳龙换热器股份有限公司 A kind of three-way connection of heat transmission equipment
JP5891537B2 (en) * 2014-07-07 2016-03-23 Smc株式会社 Pipe fitting
CN105834685A (en) * 2016-04-26 2016-08-10 苏州昭沃五金科技有限公司 Machining process for three-curved-groove connector sleeve
CN105889651B (en) * 2016-06-14 2018-10-30 张天林 Impervious, heat-resisting, anti-corrosion pipe-line system and its construction method
CN110107750A (en) * 2019-05-07 2019-08-09 杨启敖 Pipe jointing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2118227U (en) * 1992-01-21 1992-10-07 郑亚华 Self-tapping pipe expending fastening sealing structure for rubber pipe joint
CN2249852Y (en) * 1995-07-04 1997-03-19 殷永江 Aluminum-plastic composite pipe joint
JP2000002384A (en) * 1998-06-15 2000-01-07 Mirai Ind Co Ltd Connector for connecting synthetic resin pipe
CN2367872Y (en) * 1999-01-15 2000-03-08 宁波金帆管件有限公司 Compound pipe adaptor
US6273142B1 (en) * 1997-10-14 2001-08-14 Nkt Flexibles I/S Flexible pipe with an associated end-fitting
CN2469296Y (en) * 2001-03-30 2002-01-02 张俊生 Aluminium plastic pipe connecting joint
CN2605453Y (en) * 2002-02-04 2004-03-03 周国平 Equi-diameter double safety joint of aluminium-plastic composite pipe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2118227U (en) * 1992-01-21 1992-10-07 郑亚华 Self-tapping pipe expending fastening sealing structure for rubber pipe joint
CN2249852Y (en) * 1995-07-04 1997-03-19 殷永江 Aluminum-plastic composite pipe joint
US6273142B1 (en) * 1997-10-14 2001-08-14 Nkt Flexibles I/S Flexible pipe with an associated end-fitting
JP2000002384A (en) * 1998-06-15 2000-01-07 Mirai Ind Co Ltd Connector for connecting synthetic resin pipe
CN2367872Y (en) * 1999-01-15 2000-03-08 宁波金帆管件有限公司 Compound pipe adaptor
CN2469296Y (en) * 2001-03-30 2002-01-02 张俊生 Aluminium plastic pipe connecting joint
CN2605453Y (en) * 2002-02-04 2004-03-03 周国平 Equi-diameter double safety joint of aluminium-plastic composite pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101430035B (en) * 2008-12-02 2010-10-06 浙江世进水控股份有限公司 Sliding type aluminium plastic composite pipe fittings

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