CN108386642A - Application of the telescopic expansion loop in the anti-buckling field of submerged pipeline - Google Patents
Application of the telescopic expansion loop in the anti-buckling field of submerged pipeline Download PDFInfo
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- CN108386642A CN108386642A CN201810045903.XA CN201810045903A CN108386642A CN 108386642 A CN108386642 A CN 108386642A CN 201810045903 A CN201810045903 A CN 201810045903A CN 108386642 A CN108386642 A CN 108386642A
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- pipeline
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- tube
- axial limiting
- outer tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses application of the telescopic expansion loop in the anti-buckling field of submerged pipeline, compensator includes outer tube, housing pressure pipe, inner tube, hold-down bolt, rolling bearing and sealing rubber layer etc..Axial limit structure is arranged in the present apparatus in pipe, ensure that one-way movement of the inner tube with respect to outer tube, is compared with conventional bushing-type compensator, reduces the risk that pipeline and sealing material are destroyed because temperature and pressure ringing generates reciprocating motion；The pre-tensile stress that axial limit structure makes pipeline generate simultaneously can offset the compression that part temperature and pressure synergy generates, to prevent pipeline from complete buckling occurs, achieve the effect that tradition causes pre-tensile stress by embedding prebuckling pipeline and carries out buckling protection, it is embedding difficult to solve the problems, such as that traditional pre-tensile stress applies the deep-sea faced, construction cost has been saved simultaneously, ensures pipeline work safety.
Description
The present patent application is the division of parent application " a kind of anti-buckling telescopic expansion loop of pretension and its application "
Application, applying date of parent application are September in 2016 12, parent application application No. is 2016108171337.
Technical field
The present invention relates to the anti-buckling method of submerged pipeline, especially telescopic expansion loop is in the anti-buckling neck of submerged pipeline
Application in domain.
Background technology
21 century is the century of ocean.Currently, it is consumed with excessive growth, the aggravation of the energy of population so that marine oil
This emerging oil-gas mining source of gas resource, becomes the key technique that coastal various countries of the world competitively develop.In deep-sea oil
In gas engineering, submarine pipeline is indispensable key equipment.The naked horizontal direction complete buckling for setting submerged pipeline under high temperature and pressure
It is one of the principal mode of pipeline failure, is that deep-sea oil gas develops the allowed important technical challenges faced.
For this problem, large quantities of scholars have carried out a series of correlative study of submarine pipeline buckling protection, one of method
It is that realization pipe thermal compensation is improved to pipeline architecture, includes at present mainly being mended using corrugated expansion joint in engineer application
Repay, slip-type expansion joint compensation etc. a variety of thermal compensation modes.Although the above compensation way is technically ripe, exist to a certain degree
Deficiency and disadvantage, such as corrugated compensator is difficult to install with lag, and compensation rate is little, generally in 200-300mm or so；Set
The destruction of cartridge type compensator sealing material easily caused by reciprocating motion, causes to reveal.Another buckling means of defence is in pipe
It after road is laid with, is acted on by applying a degree of temperature and pressure to unburied pipeline, so that pipeline is generated pre- in the wrong in elastic range
Song, then again on the position by piping laying after buckling, to cause pre-tensile stress in pipeline, after coming into operation, pipe
The compression part that line generates under temperature and pressure synergy is offset by pre-tensile stress, to reach pipeline protective action, this method
It is that submerged pipeline buckling protects one of most economical easy measure, major defect is developed to deep-sea with oil development, to pre-
The embedding construction of buckling pipeline is extremely difficult.
Invention content
The present invention is based on pipeline complete buckling principle, proposition is a kind of to utilize casing connection section, and inner tube is by radial position limiting structure
Guarantee is concentric with outer tube, while inner tube is acted on unidirectional movement in an axial direction by axial limit structure, and pipeline is made to generate elastic range
Interior pretension, when pipeline is worked by temperature and pressure synergy inside axial limit structure make pipeline generate pre-tensile stress offset
The compression that part temperature and pressure synergy generates, to prevent pipeline from the telescopic expansion loop of complete buckling occurs.The prestretching
Power slip-type expansion joint realizes the thermal compensation mode of pipeline the combination of conventional subsea pipeline buckling means of defence.
The present invention is achieved by the following technical solutions：
A kind of anti-buckling telescopic expansion loop of pretension, including outer tube, housing pressure pipe, inner tube, hold-down bolt, rolling
Dynamic bearing and sealing rubber layer etc.；Outer tube and housing pressure pipe are coaxially disposed, the two connected by hold-down bolt to be formed it is telescopic
The left sleeve structure and right tube-in-tube structure at expansion loop both ends, between left sleeve structure and right tube-in-tube structure in coaxial arrangement
Sealing rubber layer is arranged along outer sleeve inner wall in pipe, front roll bearing and rear rolling bearing is arranged at the both ends of sealing rubber layer, outside
It is placed equidistant with axial limiter in an axial direction on casing pressure inside pipe wall, edge in the region on the inside of housing pressure pipe is located on the outer wall of inner tube
Circumference is provided with axial limiting groove, and the both ends of inner tube are embedded in the front roll bearing of outer tube, sealing rubber layer and rear rolling
In bearing.
Moreover, the outer tube includes side section, thick section, stage casing, thin segment and outer tube protrusion, side section is for connecting routine
Conveyance conduit, side section and thick section internal diameter having the same, thick section, stage casing and thin segment outer diameter having the same, thick section tube wall
Thickness is more than the thickness of stage casing tube wall, and the thickness of stage casing tube wall is more than the thickness of thin segment tube wall, and outer tube protrusion is set to thin segment
End.
Moreover, the internal diameter of the inner tube is equal to the internal diameter of outer tube side section and thick section.
Moreover, being provided with housing pressure pipe protrusion on the outer wall of the housing pressure pipe, hold-down bolt is set to housing pressure pipe
Housing pressure pipe protrusion and the outer tube protrusion of outer tube between.
Moreover, the sealing rubber layer is set on the thin segment inner wall of outer tube, sealing rubber layer is fitted closely in outer
Between internal surface of sleeve pipe and outer wall of inner tube, to ensure the leakproofness of outer tube and interior pipe connecting structure.
Moreover, the front roll bearing and rear rolling bearing matches with inner tube, i.e. front roll bearing and the rear axis of rolling
The internal diameter held is slightly larger than the outer diameter of inner tube, and steel ball, inner tube and the steel in bearing are provided in front roll bearing and rear rolling bearing
Pearl is in contact, and while ensureing inner and outer pipes and concentric rolling bearing three, it is to roll to make the relative motion resistance between inner and outer pipes
Frictional force.
Moreover, the axial limiter is by axial limiting pedestal, axial limiting handle, rotating bolt and torque spring group
At axial limiting pedestal is welded on the inner wall of housing pressure pipe, totally 4-8 group, is axially equally spaced along pipeline, every group by 6-16
A axial limiting pedestal is constituted, and is uniformly distributed on the outer same circumference of casing pressure inside pipe wall with axial limiting pedestal is organized；Axial limiting
Handle is set between axial limiting pedestal, on axial limiting handle be provided with isometrical circular hole on axial limiting pedestal, rotate spiral shell
Bolt links together axial limiting handle and axial limiting pedestal across circular hole, and two groups of torsion bullets are provided on the outside of rotating bolt
The outboard end of spring, two groups of torque springs is connect with axial limiting pedestal respectively, the inner ends of two groups of torque springs respectively with axial direction
Limit handle connection.
It is formed moreover, the axial limiting groove is replaced connection by straight plane with curved surface, under curved surface and axial limiting handle
The curvature of end curved surface is identical, i.e. axial limiting handle and the curved surface of axial limiting groove matches, to ensure that axial limiting handle can be with
It is stuck in axial limiting groove, the quantity of curved surface is 4-8, and identical as the axial setting quantity of axial limiter, two adjacent
The distance between curved surface it is equal with the distance between axially connected axial limiter.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the present invention is applied by pipeline elongation and pre-tensile stress realizes thermal compensation, component realizes land installation, reduces heat
Compensator installation cost；
2. thermal compensation of the present invention is realized in outer casing section, the enough space to be preserved of outer segment ensure pipeline high temperature and pressure joint
Freely extending under effect；
3. axial limit structure is arranged in the present invention in pipe, which ensure that one-way movement of the inner tube with respect to outer tube, with
Conventional bushing-type compensator is compared, and the wind that pipeline and sealing material are destroyed because temperature and pressure ringing generates reciprocating motion is reduced
Danger；
4. axial limit structure of the present invention makes inner and outer pipes unidirectionally move in an axial direction, because the pipeline section of high temperature and pressure effect elongation exists
It no longer bounces back in temperature-fall period, pipeline is made to generate certain pre-tensile stress in temperature-fall period, in pipeline second and later institute
Have in working cycles, the pre-tensile stress that axial limit structure makes pipeline generate can offset the pressure that part temperature and pressure synergy generates and answer
It is anti-by embedding prebuckling pipeline initiation pre-tensile stress progress buckling to reach tradition to prevent pipeline from complete buckling occurs for power
The effect of shield solves the problems, such as that traditional pre-tensile stress applies the embedding difficulty in the deep-sea faced, while having saved construction cost, protects
Demonstrate,prove pipeline work safety；
5. the torque spring of axial limiter of the present invention ensure that axial limiting handle is by torsion bullet before inner tube insertion sleeve
Spring effect is radially directed, and ensure that limit handle is contacted with the perfection of limiting groove in the work phase；
6. the present invention has the concentric motion that the rolling bearing device of radial limit function ensure that inner and outer pipes axial direction；
7. high-temperature resistant rubber sealant internal diameter of the present invention is slightly less than interior pipe outside diameter, sealant squeezes inner tube, ensures good
Sealing effect.
Description of the drawings
Fig. 1-1 is a kind of novel telescopic expansion loop longitudinal section sectional view of pretension.
Fig. 1-2 is the thin portion structural schematic diagram of the unilateral side (left sleeve structure) of Fig. 1-1.
Fig. 2-1 is a kind of cross section view of pipeline section residing for novel telescopic expansion loop axial limiter of pretension.
Fig. 2-2 is the structural schematic diagram of axial limiter in Fig. 2-1.
Fig. 3-1 is a kind of novel telescopic expansion loop axial limit structure operating diagram (axial limiter of pretension
Under off working state).
Fig. 3-2 is the partial structurtes enlarged diagram of Fig. 3-1.
Fig. 3-3 is a kind of novel telescopic expansion loop axial limit structure operating diagram (axial limiter of pretension
When contacting inner tube).
Fig. 3-4 is the partial structurtes enlarged diagram of Fig. 3-3.
Fig. 3-5 is a kind of novel telescopic expansion loop axial limit structure operating diagram (axial limiter of pretension
Under working condition).
Fig. 3-6 is the partial structurtes enlarged diagram of Fig. 3-5.
Wherein, 1 is outer tube, and 1-1 is side section, and 1-2 is thick section, and 1-3 is stage casing, and 1-4 is thin segment, and 1-5 is that outer tube is convex
It rises, 2 be housing pressure pipe, and 2-1 is housing pressure pipe protrusion, and 3 be inner tube, and 4-1 is front roll bearing, and 4-2 is rear rolling bearing, and 5 are
Sealing rubber layer, 6 be hold-down bolt, and 7 be axial limiter, and 8 be axial limiting groove, and 8-1 is straight plane, and 8-2 is curved surface, 9
It is torque spring for axial limiting handle, 10,11 be rotating bolt, and 12 be axial limiting pedestal, and 13 be left sleeve structure, and 14 be the right side
Tube-in-tube structure.
Specific implementation mode
Present invention is further described in detail with specific embodiment below in conjunction with the accompanying drawings：
As it is shown in the figures, the overall structure of the present invention is outer tube 1 passes through pressure with the housing pressure pipe 2 with axial limiter
Tight bolt 6 connects and composes left sleeve structure 13 and right tube-in-tube structure 14, and the inner tube 3 of six sections of axial limiting grooves 8 is welded on outer wall
It inside inserts between two sleeves, the side section 1-1 of outer tube both sides welds conventional pipeline, internal diameter and outer tube (the side section 1-1 of inner tube
With thick section 1-2) internal diameter size be equal to conventional pipeline size.Axial limiting groove, axial limiting groove are welded on outer wall of inner tube
Including straight plane 8-1 and curved surface 8-2, curved surface is identical as 9 curvature of curved surface of axial limiting handle.Inner tube is (axial by axial limit structure
Limiter 7 and axial limiting groove) act in outer tube and unidirectionally move；Rolling bearing (the preceding rolling being embedded in outer tube
Dynamic bearing 4-1 and rear rolling bearing 4-2) it is contacted by steel ball rolling friction in bearing with inner tube, in bearing outside diameter and outer tube
Diameter is equal, bearing bore diameter be slightly larger than interior pipe outside diameter, ensure inner and outer pipes it is concentric while, make opposite between inner tube and outer tube
The resistance of motion is less than the conventional cannula rigidly to rub；Two roller bearing shops are the refractory seals rubber layer in outer tube wall
5, sealing rubber layer is fitted in outer tube wall, and inner tube inserts in annular rubber layer, and rubber layer has certain elasticity, internal diameter
It is slightly less than interior pipe outside diameter, rubber layer squeezed tight inner tube after installation, to seal pipeline.
Conventional pipeline radius described in the present embodiment is 0.16195m, wall thickness 0.0127m.Per the routine of 2000m spacing
Pipeline connects the compensator, and when conveying high-temperature high-pressure medium for the first time, pipeline generates compression under temperature and pressure synergy
And dilatancy trend, therefore with outer tube relative motion occurs for the inner tube of expansion loop, compression is by pipeline telescopic
Compensator section is axially elongated to be discharged, and realizes pipe thermal compensation, is prevented pipeline from complete buckling occurs and is destroyed；When cooling, pipe
Generated deflection has the tendency that reduction when line heating, and the phase opposite with original direction of motion is generated between inner tube and outer tube
To movement tendency, but the axial limiting handle of housing pressure pipe inner wall will be stuck in the axial limiting groove for being welded on outer wall of inner tube at this time
(see Fig. 3-5 and Fig. 3-6) limits pipeline counter motion, and pipeline generates pre-tensile stress because that can not shrink, in second of pipeline and
In later all working cycle, the pre-tensile stress that axial limiting makes pipeline generate can offset the pressure that part temperature and pressure synergy generates
Stress, to prevent pipeline from complete buckling occurs.
Axial limit structure (axial limiter and axial limiting groove) by include axial limiting pedestal, axial limiting handle,
Rotating bolt, torque spring axial limiter and be welded on outer wall of inner tube axial limiting groove composition, operation principle
As shown in Fig. 2-1 and Fig. 2-2.The arrangement number and density of axial limiter by the connected conventional pipeline of compensator size and pipe
Road work temperature and pressure environment determines that the number of distance and axial limiting groove between axial limiting groove is with axial limiter phase one
It causes.It is 93 DEG C that the present embodiment, which is related to operating temperature, and axial limiter contains 6 groups altogether, and axial spacing 0.05m, every group by edge
12 limiters with sectional uniform distribution are constituted.When inner tube is with outer tube relative motion, axial limiting handle is made in torque spring
The trend that oriented original position rotates always under, when close to limiting groove, axial limiting handle is caught in axial limiting groove, is reached
To axial limiting function.
It describes the invention in detail, but content is only the preferred embodiment of the present invention, cannot be recognized above
For the practical range for limiting the present invention.Any changes and modifications in accordance with the scope of the present application should all still return
Belong within the patent covering scope of the present invention.
Claims (6)
1. application of the telescopic expansion loop in the anti-buckling field of submerged pipeline, it is characterised in that：
Telescopic expansion loop includes outer tube, housing pressure pipe, inner tube, hold-down bolt, rolling bearing and sealing rubber layer etc.；Outside
Casing is coaxially disposed with housing pressure pipe, and the two connects the left sleeve structure to form telescopic expansion loop both ends by hold-down bolt
With right tube-in-tube structure, be coaxially disposed inner tube between left sleeve structure and right tube-in-tube structure, outer tube include side section, thick section, in
Section, thin segment and outer tube protrusion, the internal diameter of inner tube are equal to the internal diameter of outer tube side section and thick section, and the inner wall along outer tube tubule is set
Sealing rubber layer is set, front roll bearing and rear rolling bearing, front roll bearing and rear rolling are set at the both ends of sealing rubber layer
Bearing matches with inner tube, is placed equidistant with axial limiter in an axial direction on housing pressure pipe inner wall, axial limiter is by axial limiting
Pedestal, axial limiting handle, rotating bolt and torque spring composition, axial limiting pedestal are welded on the inner wall of housing pressure pipe, edge
Pipeline is axially equally spaced, and is uniformly distributed on the outer same circumference of casing pressure inside pipe wall with axial limiting pedestal is organized, axial limiting handle
Be set between axial limiting pedestal, on axial limiting handle with isometrical circular hole, rotating bolt are provided on axial limiting pedestal
Axial limiting handle and axial limiting pedestal are linked together across circular hole, two groups of torsion bullets are provided on the outside of rotating bolt
The outboard end of spring, two groups of torque springs is connect with axial limiting pedestal respectively, the inner ends of two groups of torque springs respectively with axial direction
Limit handle connection；It is located in the region on the inside of housing pressure pipe on the outer wall of inner tube and is circumferentially provided with axial limiting groove, axis
Replace connection with curved surface by straight plane to limiting groove to form, curved surface is identical as the curvature of end curved surface under axial limiting handle, inner tube
Both ends be embedded in front roll bearing, sealing rubber layer and the rear rolling bearing of outer tube；
The both ends of telescopic expansion loop are connected to conventional pipeline, and when first time conveying high-temperature high-pressure medium, pipeline is in temperature and pressure
Compression and dilatancy trend are generated under synergy, relative motion, compression occur for inner tube and the outer tube of expansion loop
It is discharged by pipeline slip-type expansion joint section is axially elongated, realizes pipe thermal compensation, prevent pipeline from whole bend occurs
Song destroys；When cooling, generated deflection has the tendency that reduction when pipeline heats up, generated between inner tube and outer tube with it is original
The opposite relative motion trend of the direction of motion, the axial limiting handle of housing pressure pipe inner wall are stuck in the axial limit for being welded on outer wall of inner tube
In the groove of position, pipeline counter motion is limited, pipeline generates pre-tensile stress because that can not shrink, for the second time and later all in pipeline
In working cycles, the pre-tensile stress that axial limiting makes pipeline generate can offset the compression that part temperature and pressure synergy generates, from
And prevent pipeline from complete buckling occurs.
2. application of the telescopic expansion loop according to claim 1 in the anti-buckling field of submerged pipeline, feature exist
In：The side section of the outer tube is for connecting conventional conveyance conduit, side section and thick section internal diameter having the same, thick section, in
Section and thin segment outer diameter having the same, the thickness of thick section tube wall are more than the thickness of stage casing tube wall, and the thickness of stage casing tube wall is more than carefully
The thickness of Duan Guanbi, outer tube protrusion are set to the end of thin segment.
3. application of the telescopic expansion loop according to claim 1 in the anti-buckling field of submerged pipeline, feature exist
In：Housing pressure pipe protrusion is provided on the outer wall of the housing pressure pipe, hold-down bolt is set to the housing pressure pipe of housing pressure pipe
Between protrusion and the outer tube protrusion of outer tube.
4. application of the telescopic expansion loop according to claim 1 in the anti-buckling field of submerged pipeline, feature exist
In：The internal diameter of the front roll bearing and rear rolling bearing is slightly larger than the outer diameter of inner tube, front roll bearing and rear rolling bearing
It is inside provided with steel ball, inner tube is in contact with the steel ball in bearing, while ensureing inner and outer pipes and concentric rolling bearing three, makes
Relative motion resistance between inner and outer pipes is force of rolling friction.
5. application of the telescopic expansion loop according to claim 1 in the anti-buckling field of submerged pipeline, feature exist
In：The quantity of the axial limiting pedestal is totally 4-8 group, and every group is made of 6-16 axial limiting pedestals.
6. application of the telescopic expansion loop according to claim 1 in the anti-buckling field of submerged pipeline, feature exist
In：The axial limiting handle and the curved surface of axial limiting groove matches, to ensure that axial limiting handle can be stuck in axial limit
In the groove of position, the quantity of curved surface is 4-8, identical as the axial setting quantity of axial limiter, between two adjacent curved surfaces
Distance it is equal with the distance between axially connected axial limiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045903.XA CN108386642B (en) | 2016-09-12 | 2016-09-12 | Application of the telescopic expansion loop in the anti-buckling field of submerged pipeline |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817133.7A CN106439357B (en) | 2016-09-12 | 2016-09-12 | A kind of anti-buckling telescopic expansion loop of pretension and its application |
| CN201810045903.XA CN108386642B (en) | 2016-09-12 | 2016-09-12 | Application of the telescopic expansion loop in the anti-buckling field of submerged pipeline |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817133.7A Division CN106439357B (en) | 2016-09-12 | 2016-09-12 | A kind of anti-buckling telescopic expansion loop of pretension and its application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108386642A true CN108386642A (en) | 2018-08-10 |
| CN108386642B CN108386642B (en) | 2019-10-11 |
Family
ID=58167693
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810045903.XA Expired - Fee Related CN108386642B (en) | 2016-09-12 | 2016-09-12 | Application of the telescopic expansion loop in the anti-buckling field of submerged pipeline |
| CN201610817133.7A Expired - Fee Related CN106439357B (en) | 2016-09-12 | 2016-09-12 | A kind of anti-buckling telescopic expansion loop of pretension and its application |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817133.7A Expired - Fee Related CN106439357B (en) | 2016-09-12 | 2016-09-12 | A kind of anti-buckling telescopic expansion loop of pretension and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108386642B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822170A (en) * | 2019-11-21 | 2020-02-21 | 天津大学 | Water intaking end stable structure and contain sea water piping system of this structure |
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| CN2152132Y (en) * | 1993-01-09 | 1994-01-05 | 陶柏林 | Balance corrugated pipe compensator |
| CN2165310Y (en) * | 1993-06-16 | 1994-05-18 | 韩彦民 | Unloading expansion compensation connector |
| KR20050095083A (en) * | 2004-03-25 | 2005-09-29 | 고등기술연구원연구조합 | Double pipe for high pressure and temperature |
| CN2739461Y (en) * | 2004-10-20 | 2005-11-09 | 蒋新锋 | Complementary pipeline compensating device |
| CN2767796Y (en) * | 2005-02-04 | 2006-03-29 | 刘运章 | Non-metal bellows expansion joint for airway |
| CN201688074U (en) * | 2010-03-17 | 2010-12-29 | 浙江方明塑胶管道有限公司 | Two-way retractable plastic pipeline union |
| CN203656451U (en) * | 2013-09-25 | 2014-06-18 | 青阳县三宝塑业有限责任公司 | Sleeve expansion joint structure provided with sensors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2314214Y (en) * | 1997-12-30 | 1999-04-14 | 机械工业部沈阳仪器仪表工艺研究所 | Force balancing corrugated compensator |
| CN202065599U (en) * | 2011-04-21 | 2011-12-07 | 中国海洋石油总公司 | Expansion bend for adsorbing expansion deformation of submarine pipeline |
| CN103939702A (en) * | 2014-03-19 | 2014-07-23 | 江苏曙光压力容器有限公司 | External pressure type axial expansion joint |
| EP2982888B1 (en) * | 2014-08-04 | 2018-02-14 | VAT Holding AG | Membrane bellows |
| CN104712865A (en) * | 2015-03-30 | 2015-06-17 | 邝月好 | Expansion compensation connecting pipe fitting |
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- 2016-09-12 CN CN201810045903.XA patent/CN108386642B/en not_active Expired - Fee Related
- 2016-09-12 CN CN201610817133.7A patent/CN106439357B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152132Y (en) * | 1993-01-09 | 1994-01-05 | 陶柏林 | Balance corrugated pipe compensator |
| CN2165310Y (en) * | 1993-06-16 | 1994-05-18 | 韩彦民 | Unloading expansion compensation connector |
| KR20050095083A (en) * | 2004-03-25 | 2005-09-29 | 고등기술연구원연구조합 | Double pipe for high pressure and temperature |
| CN2739461Y (en) * | 2004-10-20 | 2005-11-09 | 蒋新锋 | Complementary pipeline compensating device |
| CN2767796Y (en) * | 2005-02-04 | 2006-03-29 | 刘运章 | Non-metal bellows expansion joint for airway |
| CN201688074U (en) * | 2010-03-17 | 2010-12-29 | 浙江方明塑胶管道有限公司 | Two-way retractable plastic pipeline union |
| CN203656451U (en) * | 2013-09-25 | 2014-06-18 | 青阳县三宝塑业有限责任公司 | Sleeve expansion joint structure provided with sensors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822170A (en) * | 2019-11-21 | 2020-02-21 | 天津大学 | Water intaking end stable structure and contain sea water piping system of this structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108386642B (en) | 2019-10-11 |
| CN106439357B (en) | 2018-05-15 |
| CN106439357A (en) | 2017-02-22 |
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