CN103240324B - The swollen formation system of a kind of composite bimetal pipe liquid - Google Patents
The swollen formation system of a kind of composite bimetal pipe liquid Download PDFInfo
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- CN103240324B CN103240324B CN201310166394.3A CN201310166394A CN103240324B CN 103240324 B CN103240324 B CN 103240324B CN 201310166394 A CN201310166394 A CN 201310166394A CN 103240324 B CN103240324 B CN 103240324B
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Abstract
The present invention relates to the swollen formation system of a kind of composite bimetal pipe liquid, it is characterized in that: comprise die sleeve, be arranged on servo-actuated expansion set on die sleeve and and the protective cover that is fixed on 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 die sleeve, can move axially with die sleeve; Described inner seal ring is arranged on core rod; Described radial seal block is connected on inner seal ring; Described sealing ring is arranged on core rod, for sealing the gap, junction of die sleeve and core rod; Described positioner is arranged on core rod through die sleeve.The multiple tube inner tube of this system the combining closely of ectonexine body under the effect of superhigh pressure liquid, has good sealing, and structure is simple, control the advantage convenient, reliability is high, cost is low.
Description
Technical field
The present invention relates to the swollen formation system of a kind of composite bimetal pipe liquid.
Background technology
In recent years along with expanding economy, energy demand sharp increase, international, domestic all in the dynamics strengthening recover petroleum, natural gas.Pipe-line obtains develop rapidly as a kind of economy of oil and natural gas, long distance delivery instrument safely, uninterruptedly.Traditional tubing is not suitable for the conveying of high corrosion oil gas gradually, and adopts corrosion resisting alloy cost intensive, and therefore composite bimetal pipe arises at the historic moment.Composite bimetal pipe is made up of the metal tube of two kinds of unlike materials: outer is high strength carbon steel tubing, internal layer is corrosion resistance alloy, formed by various distortion and interconnection technique between tube layer and combine closely, tubing had both had good intensity and corrosion resistance, and cost is low, obtain the extensive accreditation of domestic and international market, development rapidly.In composite bimetal pipe molding mode, because the swollen molding mode of liquid has following remarkable advantage: contact is evenly distributed, be convenient to control; Pipe internal surface without scratch and breakoff phenomenon, and without work hardening phenomenon; Combined strength bination is high, automaticity is high; Be convenient to tissue produce in enormous quantities; Scale of investment is relatively little, economize energy, and cost is low; The investment repayment phase is short, is applicable to large and medium-sized enterprise and uses.So all gradually adopt this kind of mode as the method for shaping composite bimetal pipe at home and abroad.Being expanded in type composite bimetal pipe process at liquid, being undertaken shaping by mould by injecting highly pressurised liquid after the shutoff of multiple tube two ends, the most important thing is inner alloy pipe and outer layer pipe to combine closely.Due in forming process, outer layer pipe generation elastic deformation, axial shortening length is shorter; Inner alloy pipe generation plastic deformation, size all will change on radial and axial, and axial shrinkage amount is larger.Therefore in order to make the shaping rear ectonexine end of composite bimetal pipe relatively consistent, a kind of change that automatically can adapt to ectonexine compo pipe length is needed, and the swollen formation system of liquid that the superhigh pressure sealing that can meet the distortion of radial large scale requires.
Summary of the invention
The technical problem to be solved in the present invention is to provide the swollen formation system of a kind of composite bimetal pipe liquid, to overcome the defect existed in prior art.It can adapt to the feature that the axial length variations amount of ectonexine pipe does not wait automatically, and automatically reliably can balance along with the change of swollen type power and its axial force, overcome that on equipment, to increase equilibrant force that force balancing system causes unstable and control complicated thus easily cause the shortcoming of composite steel tube quality instability, and the positiver sealing of the large deflection hyperpressure of diametric(al) in forming process can be met, thus make multiple tube inner tube the combining closely of ectonexine body under the effect of superhigh pressure liquid, there is good sealing, structure is simple, it is convenient to control, reliability is high, the advantage that cost is low.
Technical scheme of the present invention is:
The swollen formation system of a kind of composite bimetal pipe liquid, is characterized in that: comprise die sleeve, be arranged on servo-actuated expansion set on die sleeve and and the protective cover that is fixed on 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 die sleeve, can move axially with die sleeve; Described inner seal ring is arranged on core rod; Described radial seal block is connected on inner seal ring; Described sealing ring is arranged on core rod, for sealing the gap, junction of die sleeve and core rod; Described positioner is arranged on core rod through die sleeve.
Described protective cover is bolted on die sleeve.
Described inner seal ring is arranged on core rod by Sealing shield ring or head, root thread connecting mode.
Technique effect of the present invention is:
1, servo-actuated expansion set diameter D and outer tube outer diameter D is adopted
1coordinate design, ensure that in whole forming process, Steel pipe end surface fits tightly with mould all the time, and inner tube is in sealing state all the time.
2, servo-actuated expansion set ensures that inner tube still can seal up overpressure at generation larger axis to during distortion, can realize the length variations requirement of steel pipe length range inner tube in swollen type of different length.
3, according to the core rod in servo-actuated expansion set diameter D with outer tube outer diameter D
1relational expression D=KD
1, the swollen type instrument of multiple tube of different tube diameters can be designed easily.For a kind of pipe of outer tube external diameter, no matter the wall thickness material of inner and outer pipes, a kind of swollen type instrument just can realize the requirement of swollen type.
4, structure is simple, good stability, is convenient to control.
Accompanying drawing explanation
Fig. 1 is initial configuration schematic diagram of the present invention;
Fig. 2 is that compound pipe molding of the present invention terminates 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 tube, 8-Sealing shield ring, 9-protective cover, 10-die sleeve, 11-bolt, 12-radial seal block.
Detailed description of the invention
The invention belongs to composite bimetal pipe molding equipment field, particularly the swollen formation system of a kind of composite bimetal pipe liquid, is special super-pressure formation system.
See Fig. 1 and Fig. 2, the concrete structure of the swollen formation system of a kind of composite bimetal pipe liquid that the present invention relates to is:
Comprise die sleeve 10, be arranged on servo-actuated expansion set on die sleeve 10 1 and and the protective cover 9 that is fixed on die sleeve 10, servo-actuated expansion set 1 mainly plays follows steel tube end part and outer tube 6 moves with the end of inner tube 7, and fit all the time outer tube 6 and inner tube 7 end; Protective cover 9 plays safety protection function, and after losing efficacy to prevent inner seal ring 5, the highly pressurised liquid injection that leaks damaged; 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 die sleeve 10, can move axially with die sleeve 10;
Described inner seal ring 5 is arranged on core rod 4;
Described radial seal block 12 is connected on inner seal ring 5;
Described sealing ring 2 is arranged on core rod 4, and for sealing the gap, junction of die sleeve 10 and core rod 4, sealing ring 2 moves with core rod 4, seals;
Described positioner 3 is arranged on core rod 4 through die sleeve 10, plays the effect of circumferential rotation in preventing core rod 4 from moving axially.Positioner 3 is axially with the cylinder of central through hole.
Protective cover 9 in the present invention is specifically fixed on die sleeve 10 by bolt 11.
Inner seal ring 5 in the present invention is specifically arranged on core rod 4 by Sealing shield ring 8 or head, root thread connecting mode, ensures the groove dimensions of inner seal ring 5, plays the effect of restriction inner seal ring 5.
Operation principle of the present invention is:
Formation system of the present invention have employed servo-actuated expansion set 1 and reaches object with multiple tube length variations position follower and strength self-balancing, ensures that the compound pipe molding process of various length has the requirement of excellent sealing.Can with the movement automatically of inner tube axial shortening in the swollen forming process of liquid, ensure that steel tube end part all the time with core rod end face close contact; Inner seal ring can play and seal in advance before steel pipe internal-filling liquid under fluid pressure effect, and pressurization continues the effect of sealing, ensures that inner tube is in sealing state all the time, and inner tube end can be made to combine closely without brought into hydraulic contact region and outer tube.
See Fig. 1, in compound pipe molding process, shaping outer tube 6 is needed to be enclosed within inner tube 7, and inner tube 7 length is greater than outer tube 6 length (concrete length calculates according to practical condition and determines), have certain interval between inner tube 7 and outer tube 6, inner tube 7 two ends fit tightly with core rod 4 end filling, arrange die device respectively.Time shaping, first allow middle press liquid namely give seal fluid enters inner seal ring 5 inner ring by core rod 4, there is radial deformation and outwards swell in inner seal ring 5 under hydraulic action, fits tightly, inner tube 7 two ends are sealed with inner tube 7 inwall, then low pressure liquid is through the die sleeve 10 of topping up end and core rod 4 inner layer pipe 7 body internal-filling liquid, through the die sleeve 10 of exhaust end and core rod 4, the air in inner tube 7 body is drained, seal up topping up end and exhaust end, again supercharging is carried out to liquid in pipe, along with the rising of fluid pressure, inner tube 7 transfers plastic deformation to by elastic deformation, under the acting in conjunction of interior pressure and axial thrust, inner tube 7 radial direction increases, axial shortening, in boost process, when pressure reaches certain numerical value, the seal fluid that gives of core rod 4 is communicated with the highly pressurised liquid in inner tube 7, outwards swelling pressure is consistent with inner tube 7 pressure to make inner seal ring 5, ensure to recur distortion under inner tube 7 is in sealing state in whole compound pipe molding process.And end can be made shaping without highly pressurised liquid contact area ectonexine pipe.
See Fig. 2, when inner tube 7 axial shortening, core rod (4) same to outer tube (6) outer diameter D in servo-actuated expansion set (diameter D) (1)
1relation as follows:
D＝KD
1
In formula: the servo-actuated expansion set diameter of D--;
D
1---with outer tube external diameter;
K-correction factor.
Core rod 4 makes servo-actuated expansion set 1 entirety move along with the change of steel pipe under action of hydraulic force, and the front end face of core rod 4 is close to multiple tube end.Positioner 3 in servo-actuated expansion set 1 ensures that servo-actuated expansion set 1 moves axially, and can not circumferentially rotate.In shaping, inner tube 7 shortens gradually, until in retraction outer tube 6, sees the Δ L in Fig. 2.Can ensure after shaping end that inner tube 7 and outer tube 6 fit tightly, servo-actuated expansion set 1 has larger shaft orientation moving range, the present invention is enable to adapt to the large deflection of ectonexine pipe axial length, and multiple tube ectonexine entirety is combined closely, after shaping, ectonexine tube end flushes, and can adapt to caliber 100-2500mm, change that the liquid of length 6-15m is expanded into type composite bimetal pipe.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (3)
1. the swollen formation system of composite bimetal pipe liquid, it is characterized in that: comprise die sleeve (10), be arranged on servo-actuated expansion set (1) on die sleeve (10) and and the protective cover (9) that is fixed on 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), described core rod (4) is arranged on die sleeve (10), can move axially with die sleeve (10); Described inner seal ring (5) is arranged on core rod (4); Described radial seal block (12) is connected on inner seal ring (5); Described sealing ring (2) is arranged on core rod (4), for sealing the gap, junction of die sleeve (10) and core rod (4); Described positioner (3) is arranged on core rod (4) through die sleeve (10);
In compound pipe molding process, need shaping outer tube to be enclosed within inner tube, and inner tube length is greater than outer tube length, has gap between inner tube and outer tube, inner tube two ends fit tightly with the mandrel tip of filling, arranging die device respectively; Time shaping, first allow middle press liquid namely give seal fluid enters inner seal ring inner ring by core rod, under hydraulic action, inner seal ring generation radial deformation outwards swells, and fits tightly with inner tube inwall, and inner tube two ends are sealed; Then low pressure liquid is through the die sleeve of topping up end and core rod inner layer body internal-filling liquid, through the die sleeve of exhaust end and core rod, the air in internal layer body is drained, seal up topping up end and exhaust end, again supercharging is carried out to liquid in pipe, along with the rising of fluid pressure, inner tube transfers plastic deformation to by elastic deformation, under the acting in conjunction of interior pressure and axial thrust, inner tube radial direction increases, axial shortening, make inner seal ring outside swelling pressure consistent with inner tube pressure, ensure to recur distortion under inner tube is in sealing state in whole compound pipe molding process.
2. the swollen formation system of composite bimetal pipe liquid according to claim 1, is characterized in that: described protective cover (9) is fixed on die sleeve (10) by bolt (11).
3. the swollen formation system of a kind of composite bimetal pipe liquid according to claim 1 and 2, is characterized in that: described inner seal ring (5) by Sealing shield ring (8) or head and root simultaneously thread connecting mode be arranged on core rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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| CN103240324A CN103240324A (en) | 2013-08-14 |
| CN103240324B true CN103240324B (en) | 2015-08-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104438471B (en) * | 2014-11-13 | 2016-06-22 | 西安向阳航天材料股份有限公司 | A kind of method eliminating multiple tube base/lining fit-up gap |
| 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 |
| 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 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5837050B2 (en) * | 1979-03-15 | 1983-08-13 | 川崎重工業株式会社 | Double pipe manufacturing equipment |
| JPS6049058B2 (en) * | 1981-12-21 | 1985-10-30 | 川崎重工業株式会社 | Double tube manufacturing method |
| 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 |
| CN101352745B (en) * | 2008-09-11 | 2010-08-25 | 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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