CN103240324A - Liquid-expansion forming system for bimetal composite pipe - Google Patents
Liquid-expansion forming system for bimetal composite pipe Download PDFInfo
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- CN103240324A CN103240324A CN2013101663943A CN201310166394A CN103240324A CN 103240324 A CN103240324 A CN 103240324A CN 2013101663943 A CN2013101663943 A CN 2013101663943A CN 201310166394 A CN201310166394 A CN 201310166394A CN 103240324 A CN103240324 A CN 103240324A
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- die sleeve
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Abstract
The invention relates to a liquid-expansion forming system for a bimetal composite pipe. The liquid-expansion forming system for the bimetal composite pipe is characterized by comprising a die sleeve, a follow-up expansion sleeve arranged on the die sleeve and a shield fixed on the die sleeve. The follow-up follow-up expansion sleeve comprises a seal ring, a positioning device, a die core, an inner seal ring and a radial seal guide block. The die core is arranged on the die sleeve and can radially move along the die sleeve. The inner seal ring is arranged on the die core. The radial seal guide block is connected on the inner seal ring. The seal ring is arranged on the die core and is used for sealing a gap at the connection of the die sleeve and the die core. The positioning device penetrates through the die sleeve and is mounted on the die core. Pipe bodies in the inner layer and the outer layer of the inner-layer pipe of the composite pipe are tightly coupled under the action of ultrahigh pressure liquid. The liquid-expansion forming system has the advantages of good sealability, simple structure, convenience in control, high reliability and low production cost.
Description
Technical field
The present invention relates to a kind of composite bimetal pipe liquid and be expanded into the type system.
Background technology
In recent years along with expanding economy, the energy demand sharp increase, international, domestic all in the dynamics that strengthens recover petroleum, natural gas.Pipe-line has obtained developing rapidly apart from means of delivery as a kind of economy of oil and natural gas, safely, uninterruptedly length.Traditional tubing is not suitable for the conveying of high corrosion oil gas gradually, and adopts corrosion resisting alloy cost costliness, so composite bimetal pipe arises at the historic moment.Composite bimetal pipe is that the metal tube by two kinds of unlike materials constitutes: outerly be the high strength carbon steel tubing, internal layer is the corrosion resistance alloy, combine closely by various distortion and interconnection technique formation between the pipe layer, tubing had both had good intensity and corrosion resistance, and cost is low, obtained the extensive approval of domestic and international market, development rapidly.In the composite bimetal pipe molding mode, because liquid is expanded into the type mode and has following remarkable advantage: the contact pressure distribution is even, is convenient to control; Pipe internal surface does not have scratch and breakoff phenomenon, and does not have the work hardening phenomenon; Combined strength bination height, automaticity height; Being convenient to tissue produces in enormous quantities; Scale of investment is less relatively, energy savings, and cost is low; The investment repayment phase is short, is fit to large and medium-sized enterprise and uses.So all gradually adopt this kind mode as the method for moulding composite bimetal pipe at home and abroad.Be expanded in the type composite bimetal pipe process at liquid, inject highly pressurised liquid by mould after with the shutoff of multiple tube two ends and carry out moulding, the most important thing is inner alloy pipe and outer layer pipe are combined closely.Since in forming process, outer layer pipe generation strain, and it is shorter axially to shorten length; Inner alloy pipe generation plastic deformation, size all will change on radial and axial, and the axial shrinkage amount is bigger.Therefore consistent relatively for ectonexine end after making the composite bimetal pipe moulding, need a kind of variation that can adapt to ectonexine compo pipe length automatically, and the liquid that can satisfy the superhigh pressure sealing requirement that large scale radially is out of shape is expanded into the type system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of composite bimetal pipe liquid and is expanded into the type system, to overcome the defective that exists in the prior art.It can adapt to the characteristics that the ectonexine tubular axis does not wait to the length variations amount automatically, and can be along with variation and the automatically reliable balance of its axial force of the type power that expands, thereby overcome at equipment and increased the unstable and complicated unsettled shortcoming of composite steel tube quality that easily causes of control of equilibrant force that the dynamic balance system causes, and can satisfy the positiver sealing of the deflection hyperpressure that diametric(al) is big in the forming process, thereby make multiple tube inner layer pipe the combining closely of ectonexine body under the effect of superhigh pressure liquid, have good sealing property, simple in structure, control is convenient, the reliability height, the advantage that cost is low.
Technical scheme of the present invention is:
A kind of composite bimetal pipe liquid is expanded into the type system, it is characterized in that: comprise die sleeve, be arranged on the die sleeve servo-actuated expansion set and and be fixed on protective cover on the die sleeve; Wherein servo-actuated expansion set comprises sealing ring, positioner, core rod, inner seal ring and radial seal guide block, and described core rod is arranged on the die sleeve, can move axially with die sleeve; Described inner seal ring is arranged on the core rod; Described radial seal block is connected on the inner seal ring; Described sealing ring is arranged on the core rod, is used for the gap, junction of sealing die sleeve and core rod; Described positioner passes die sleeve and is installed on the core rod.
Described protective cover is by being bolted on the die sleeve.
Described inner seal ring is arranged on the core rod by Sealing shield ring or head, root thread connecting mode.
Technique effect of the present invention is:
1, adopts servo-actuated expansion set diameter D and outer tube D outer diameter
1Coordinate design, guarantee that the steel pipe end face fits tightly with mould all the time in the whole forming process, and inner layer pipe is in sealing state all the time.
2, servo-actuated expansion set guarantees that inner layer pipe still can seal up the pipe internal pressure when taking place larger axis to distortion, can realize the length variations requirement of steel pipe length range inner layer pipe in the type that expands of different length.
3, according to the core rod among the servo-actuated expansion set diameter D with the outer tube D outer diameter
1Relational expression D=KD
1, the multiple tube that can the design different tube diameters easily type instrument that expands.For a kind of pipe of outer tube external diameter, no matter the wall thickness material of inner and outer pipes, a kind of bloated type instrument just can be realized the requirement of bloated type.
4, simple in structure, good stability is convenient to control.
Description of drawings
Fig. 1 is initial configuration schematic diagram of the present invention;
Fig. 2 is that compound pipe molding of the present invention finishes structural representation.
Reference numeral is:
1-servo-actuated expansion set, 2-sealing ring, 3-positioner, 4-core rod, 5-inner seal ring, 6-outer tube, 7-inner layer pipe, 8-Sealing shield ring, 9-protective cover, 10-die sleeve, 11-bolt, 12-radial seal block.
The specific embodiment
The invention belongs to composite bimetal pipe molding equipment field, particularly a kind of composite bimetal pipe liquid is expanded into the type system, is special-purpose super-pressure formation system.
Referring to Fig. 1 and Fig. 2, the concrete structure that a kind of composite bimetal pipe liquid that the present invention relates to is expanded into the type system is:
Comprise die sleeve 10, be arranged on the die sleeve 10 servo-actuated expansion set 1 and and be fixed on protective cover 9 on the die sleeve 10, servo-actuated expansion set 1 mainly plays and follows steel tube end part is that outer tube 6 moves with the end of inner layer pipe 7, and the work of fit all the time outer tube 6 and inner layer pipe 7 ends; Protective cover 9 usefulness play the security protection effect, damage to prevent that inner seal ring 5 inefficacy back highly pressurised liquids from leaking to spray; Wherein
Servo-actuated expansion set 1 comprises sealing ring 2, positioner 3, core rod 4, inner seal ring 5 and radial seal guide block 12,
Described core rod 4 is arranged on the die sleeve 10, can move axially with die sleeve 10;
Described inner seal ring 5 is arranged on the core rod 4;
Described radial seal block 12 is connected on the inner seal ring 5;
Described sealing ring 2 is arranged on the core rod 4, is used for the gap, junction of sealing die sleeve 10 and core rod 4, and sealing ring 2 is mobile with core rod 4, seals;
Described positioner 3 passes die sleeve 10 and is installed on the core rod 4, plays the effect that prevents core rod 4 circumferential rotation in moving axially.Positioner 3 is for axially having the cylinder of central through hole.
Protective cover 9 among the present invention specifically can be fixed on the die sleeve 10 by bolt 11.
Operation principle of the present invention is:
Formation system of the present invention has adopted servo-actuated expansion set 1 to reach purpose with multiple tube length variations position follower and strength self-balancing, guarantees that the compound pipe molding process of all lengths has the requirement of excellent sealing.Be expanded in the type process and can axially shorten automatic the movement with inner layer pipe at liquid, guaranteed that steel tube end part closely contacts with the core rod end face all the time; Inner seal ring can play under the fluid pressure effect before the steel pipe internal-filling liquid and seal in advance, and pressurization continues the effect of sealing, guarantees that inner layer pipe is in sealing state all the time, and aneroid press contacts zone, inner layer pipe end and outer tube are combined closely.
Referring to Fig. 1, in the compound pipe molding process, need the outer tube 6 of moulding to be enclosed within on the inner layer pipe 7, and inner layer pipe 7 length are greater than outer tube 6 length (concrete length is calculated according to practical condition and determined), between inner layer pipe 7 and the outer tube 6 certain interval is arranged, inner layer pipe 7 two ends fit tightly with core rod 4 ends of filling, arranging die device respectively.During moulding, press liquid namely gives seal fluid and enters the inner ring of inner seal ring 5 by core rod 4 at first allowing, and inner seal ring 5 radial deformations take place outwards swells under hydraulic action, fits tightly with inner layer pipe 7 inwalls, makes inner layer pipe 7 sealed at both ends; The die sleeve 10 of low pressure liquid process topping up end and core rod 4 are to inner layer pipe 7 body internal-filling liquids then, die sleeve 10 and core rod 4 through exhaust end are drained the air in inner layer pipe 7 bodies, seal up topping up end and exhaust end, again liquid in pipe is carried out supercharging, rising along with fluid pressure, inner layer pipe 7 transfers plastic deformation to by strain, under the acting in conjunction of internal pressure and axial thrust, inner layer pipe 7 radially increases, axially shorten, in the process of boosting, when pressure reaches certain numerical value, the highly pressurised liquid that gives in seal fluid and the inner layer pipe 7 of core rod 4 is communicated with, and makes inner seal ring 5 outside swelling pressure consistent with inner layer pipe 7 pressure, guarantees that inner layer pipe 7 is under the sealing state in the whole compound pipe molding process to recur distortion.And can make the end not have the moulding of highly pressurised liquid contact area ectonexine pipe.
Referring to Fig. 2, when inner layer pipe 7 axially shortens, the same outer tube of core rod (4) (6) D outer diameter in the servo-actuated expansion set (diameter D) (1)
1Relation as follows:
D=KD
1
In the formula: the servo-actuated expansion set diameter of D--;
D
1---With the outer tube external diameter;
K-correction factor.
Core rod 4 makes servo-actuated expansion set 1 integral body move along with the variation of steel pipe under action of hydraulic force, and the front end face of core rod 4 is close to the multiple tube end.Positioner 3 in the servo-actuated expansion set 1 guarantees that 1 of servo-actuated expansion set moves axially, and can circumferentially not rotate.In the moulding, inner layer pipe 7 shortens gradually, in retraction outer tube 6, sees the Δ L among Fig. 2.After finishing, moulding can guarantee that inner layer pipe 7 and outer tube 6 fit tightly, servo-actuated expansion set 1 has bigger shaft orientation moving range, make the present invention can adapt to the ectonexine tubular axis to the big deflection of length, and multiple tube ectonexine integral body is combined closely, the ectonexine tube end flushed after moulding finished, and the liquid that can adapt to caliber 100-2500mm, length 6-15m is expanded into the variation of type composite bimetal pipe.
The parts that present embodiment is not described in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (3)
1. a composite bimetal pipe liquid is expanded into the type system, it is characterized in that: comprise die sleeve (10), be arranged on the die sleeve (10) servo-actuated expansion set (1) and and be fixed on protective cover (9) on the die sleeve (10); Wherein servo-actuated expansion set (1) comprises sealing ring (2), positioner (3), core rod (4), inner seal ring (5) and radial seal guide block (12), and described core rod (4) is arranged on the die sleeve (10), can move axially with die sleeve (10); Described inner seal ring (5) is arranged on the core rod (4); Described radial seal block (12) is connected on the inner seal ring (5); Described sealing ring (2) is arranged on the core rod (4), is used for the gap, junction of sealing die sleeve (10) and core rod (4); Described positioner (3) passes die sleeve (10) and is installed on the core rod (4).
2. composite bimetal pipe liquid according to claim 1 is expanded into the type system, it is characterized in that: described protective cover (9) is fixed on the die sleeve (10) by bolt (11).
3. a kind of composite bimetal pipe liquid according to claim 1 and 2 is expanded into the type system, it is characterized in that: described inner seal ring (5) is arranged on the core rod (4) by Sealing shield ring (8) or head, root thread connecting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310166394.3A CN103240324B (en) | 2013-05-08 | 2013-05-08 | The swollen formation system of a kind of composite bimetal pipe liquid |
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| CN201310166394.3A CN103240324B (en) | 2013-05-08 | 2013-05-08 | The swollen formation system of a kind of composite bimetal pipe liquid |
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| CN103240324A true CN103240324A (en) | 2013-08-14 |
| CN103240324B CN103240324B (en) | 2015-08-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629445A (en) * | 2013-12-05 | 2014-03-12 | 青岛恒基泰机电科技有限公司 | Composite pipe hydraulic expansion method, manufacturing device and obtained composite pipe |
| CN104438471A (en) * | 2014-11-13 | 2015-03-25 | 西安向阳航天材料股份有限公司 | Method for eliminating assembly gap between base and lining of composite tube |
| CN105344791A (en) * | 2015-11-23 | 2016-02-24 | 宁波思明汽车科技股份有限公司 | Plug structure for inner high pressure forming |
| CN105921589A (en) * | 2016-04-28 | 2016-09-07 | 西安向阳航天材料股份有限公司 | Manufacturing method of bimetal composite pipe with uniformly deformed whole pipe body |
| CN107442672A (en) * | 2017-09-11 | 2017-12-08 | 常州大学 | A kind of method of inner-walls of duct covering lead inside bromine tank container body |
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| JPS58107225A (en) * | 1981-12-21 | 1983-06-25 | Kawasaki Heavy Ind Ltd | Manufacture of double pipe |
| CN1651163A (en) * | 2005-02-04 | 2005-08-10 | 华东理工大学 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
| CN200945508Y (en) * | 2006-09-27 | 2007-09-12 | 简国良 | Metal composite tube manufacturing apparatus |
| CN101352745A (en) * | 2008-09-11 | 2009-01-28 | 大连合生科技开发有限公司 | Composited tube hydraulic forming device |
| CN201651295U (en) * | 2010-04-09 | 2010-11-24 | 青岛恒基泰机电科技有限公司 | End part seal of high-pressure hydraulic system of steel tube pressure test equipment |
| CN201697833U (en) * | 2010-06-04 | 2011-01-05 | 青岛恒基泰机电科技有限公司 | Big gap internal expanding seal ring |
| CN203330215U (en) * | 2013-05-08 | 2013-12-11 | 中国重型机械研究院股份公司 | Bimetal composite pipe liquid-expansion forming mold |
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2013
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS55122632A (en) * | 1979-03-15 | 1980-09-20 | Kawasaki Heavy Ind Ltd | Double pipe producing apparatus |
| JPS58107225A (en) * | 1981-12-21 | 1983-06-25 | Kawasaki Heavy Ind Ltd | Manufacture of double pipe |
| CN1651163A (en) * | 2005-02-04 | 2005-08-10 | 华东理工大学 | Hydraulic shaping device of stainless steel lined compound pipe and its shaping method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629445A (en) * | 2013-12-05 | 2014-03-12 | 青岛恒基泰机电科技有限公司 | Composite pipe hydraulic expansion method, manufacturing device and obtained composite pipe |
| CN103629445B (en) * | 2013-12-05 | 2016-01-20 | 青岛中瑞泰软控技术有限公司 | A kind of composite pipe Hydraulic expansion method and producing device and the composite pipe obtained thereof |
| CN104438471A (en) * | 2014-11-13 | 2015-03-25 | 西安向阳航天材料股份有限公司 | Method for eliminating assembly gap between base and lining of composite tube |
| CN105344791A (en) * | 2015-11-23 | 2016-02-24 | 宁波思明汽车科技股份有限公司 | Plug structure for inner high pressure forming |
| CN105344791B (en) * | 2015-11-23 | 2017-10-24 | 宁波思明汽车科技股份有限公司 | The stopper structure being molded for inner high voltage |
| CN105921589A (en) * | 2016-04-28 | 2016-09-07 | 西安向阳航天材料股份有限公司 | Manufacturing method of bimetal composite pipe with uniformly deformed whole pipe body |
| CN105921589B (en) * | 2016-04-28 | 2018-11-09 | 西安向阳航天材料股份有限公司 | A kind of manufacturing method of the composite bimetal pipe of full tube body homogeneous deformation |
| CN107442672A (en) * | 2017-09-11 | 2017-12-08 | 常州大学 | A kind of method of inner-walls of duct covering lead inside bromine tank container body |
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| CN103240324B (en) | 2015-08-19 |
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