CN110307428A - A kind of displacement compensation device of space pipeline - Google Patents
A kind of displacement compensation device of space pipeline Download PDFInfo
- Publication number
- CN110307428A CN110307428A CN201910663738.9A CN201910663738A CN110307428A CN 110307428 A CN110307428 A CN 110307428A CN 201910663738 A CN201910663738 A CN 201910663738A CN 110307428 A CN110307428 A CN 110307428A
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- Prior art keywords
- elbow
- expansion joint
- single entry
- whirl compensator
- compensation device
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 38
- 238000009434 installation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- YTCQFLFGFXZUSN-BAQGIRSFSA-N microline Chemical compound OC12OC3(C)COC2(O)C(C(/Cl)=C/C)=CC(=O)C21C3C2 YTCQFLFGFXZUSN-BAQGIRSFSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
-
- 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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
- F16L27/125—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement having longitudinal and rotary movement
-
- 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
- F16L43/00—Bends; Siphons
-
- 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
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/022—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with a single corrugation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The present invention relates to a kind of displacement compensation device of space pipeline, including whirl compensator and single entry hinge expansion joint, one end of the whirl compensator connects outer tube I, and the other end is connected with one end of elbow I；The other end of elbow I is connected by straight tube I with one end of the single entry hinge expansion joint；The other end of the single entry hinge expansion joint is connected with one end of elbow II；The other end of elbow II is connected by straight tube II with outer tube II；The whirl compensator is mutually perpendicular to plane where the elbow II in space with plane where the elbow I and the single entry hinge expansion joint；The hinge pin of the single entry hinge expansion joint and the rotation axis of the whirl compensator are in space keeping parallelism；Fixation bracket of the whirl compensator close to the outer tube I.The present invention can effectively meet the demand for changing the specific position installation pipeline of absolute altitude in big displacement pipeline corner and again, and compensation rate is big, and compact-sized, the pressure loss is small, and cost performance is high.
Description
Technical field
The present invention relates to a kind of line connection device, especially a kind of displacement compensation device, specifically a kind of space
The displacement compensation device of pipeline.
Background technique
When carrying out pipe design, in guarantee pipeline with sufficient flexibility under the premise of absorbing displacement strain, in order to make pipe
The length in road is as short as possible or investment is as small as possible, and increasing pipeline flexible by selecting compensator is reach said effect normal
Use measure.At present on the heating power common-use tunnel belonging to urban heating pipe network and enterprises and institutions and in novel public building
It passes through Seismic Isolation of Isolation Layer or passes in and out the steam or hot water pipeline of common trench, similar pipeline enters and leaves steam power plant or district boiler room and edge
Town road enters thermal substation etc., it is often necessary to arrange pipeline by trend of road, exist should corner adjust the spy of absolute altitude again
Determine spatial position.Therefore, on the one hand selected compensator will absorb hundred millimeter magnitude big displacements in affiliated expansion arc, on the other hand
Meet the arrangement space limitation of particular orientation pipeline.Conventional method for arranging is to select whirl compensator or select bellows swollen
Swollen section.Whirl compensator is such as selected, then pipeline must be transformed, more spaces is occupied, be easy to cause the pressure loss；Such as select ripple
Pipe expansion joint causes total bit shift compensation cost performance to reduce then because of itself price at high cost.Therefore, it is necessary to design one kind
Completely new displacement compensation device, to meet the installation requirements of such pipeline.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of displacement compensation devices of space pipeline, can have
Effect meets the pipeline corner in big displacement and the specific position of change absolute altitude installs the demand of pipeline again, and compensation rate is big, structure
Compact, the pressure loss is small, makes total bit shift compensation cost performance highest.
The technical scheme is that
A kind of displacement compensation device of space pipeline, including whirl compensator and single entry hinge expansion joint, the whirl compensator
One end connect outer tube I, the other end is connected with one end of elbow I；The other end of elbow I passes through straight tube I and the single entry
One end of hinge expansion joint is connected；The other end of the single entry hinge expansion joint is connected with one end of elbow II；Elbow II's is another
One end is connected by straight tube II with outer tube II；The whirl compensator and plane and the single entry hinge where the elbow I are swollen
Swollen section is mutually perpendicular to plane where the elbow II in space；The hinge pin and the rotation of the single entry hinge expansion joint
The rotation axis of compensator is in space keeping parallelism；Fixation bracket of the whirl compensator close to the outer tube I.
Further, the elbow I is major radius elbow；The hinge pin and the rotation of the single entry hinge expansion joint
Parallel clear distance between the rotation axis of compensator is greater than 2DN.
Further, the elbow I is short radius elbow；The hinge pin and the rotation of the single entry hinge expansion joint
Parallel clear distance between the rotation axis of compensator is greater than 1.5DN.
It further, further include bearing assembly I, bearing assembly I includes roller support and F interconnectedⅠType is variable
Spring support；The roller support is located at the FⅠType can be changed the top of spring support, and be connected with the straight tube II；The connection
The clear distance for locating vertical center line and the two center line intersection points of elbow II is less than 5DN.
Further, further include bearing assembly II, bearing assembly II include line contact elbow support interconnected and
FⅡType can be changed spring support；The line contact elbow support includes pipe support and arc panel；The lower end of the column and the arc
Shape plate upper surface is connected, and upper end is connected with the elbow I；The lower end surface of the arc panel and the FⅡType can be changed spring support
Idler wheel keeps line contact.
Further, the hinge pin of the radius of curvature of the arc panel and the single entry hinge expansion joint is to the FⅡType
Distance at the top of the idler wheel of variable spring support is suitable.
Further, the elbow I is 90 ° of elbows；The elbow II is any angle elbow.
Further, the connection direction of the whirl compensator and the elbow I are to make medium from the whirl compensator
The core pipe end of itself flows to its housing pipe end.
Beneficial effects of the present invention:
The present invention has rational design, and structure is simple, easy to use, can effectively meet in big displacement pipeline corner and change absolute altitude again
Specific position installs the demand of pipeline, and compensation rate is big, and compact-sized, the pressure loss is small, makes total bit shift compensation cost performance most
It is high.
Detailed description of the invention
Fig. 1 is the front view and left view of the embodiment of the present invention one.
Fig. 2 is the operating principle schematic diagram of the embodiment of the present invention one.
Fig. 3 is the front view and left view of the embodiment of the present invention two.
Fig. 4 is the A direction view in Fig. 3.
Fig. 5 is the swing schematic diagram of the embodiment of the present invention two.
Fig. 6 is the front view and left view of the embodiment of the present invention three.
Fig. 7 is the swing schematic diagram of the embodiment of the present invention three.
Wherein: 1- outer tube I；2- whirl compensator；3- elbow I；4- straight tube I；5- single entry hinge expansion joint；6- elbow II；
7- straight tube II；8- outer tube II；9- bearing assembly I；10- bearing assembly II；101- column；102- arc panel.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment one.
As shown in Figure 1, a kind of displacement compensation device of space pipeline, including whirl compensator 2 and single entry hinge expansion joint
5.One end of the whirl compensator 2 connects outer tube I1, and the other end is connected with one end of elbow I3；The other end of elbow I3
It is connected by straight tube I4 with one end of the single entry hinge expansion joint 5；The other end and elbow II6 of the single entry hinge expansion joint 5
One end be connected；The other end of elbow II6 is connected by straight tube II7 with outer tube II8；The whirl compensator 2 with it is described curved
Plane where head I3 and the single entry hinge expansion joint 5 are mutually perpendicular to plane where the elbow II6 in space；The rotation
Compensator 2 close to the outer tube I1 fixation bracket, specifically: as DN≤1000mm, the whirl compensator 2 is away from fixed branch
Clear distance≤2DN of frame；As DN > 1000mm, the whirl compensator 2 guarantees ring away from support bracket fastened clear distance≤1DN
Support bracket fastened clear distance >=the 50mm of weld pitch.
The whirl compensator 2 forms rotating arm after connecting with the elbow I3, and connecting direction is to make medium from rotation
The core pipe end of compensator 2 itself flows to its housing pipe end.
The single entry hinge expansion joint 5 is connected with straight tube I4 and elbow II6, reconnects straight tube II7 and forms swing arm.
The hinge pin of the single entry hinge expansion joint 5 and 2 rotation axis of whirl compensator are in space keeping parallelism, and two
The parallel clear distance of axis are as follows: the radius of elbow I3+straight tube I4 length+straight tube I4 to 5 hinge pin of single entry hinge expansion joint
Length, that is, the pendulum radius R of swing arm.Wherein, the length of straight tube I4 can be used to adjust pendulum radius R.It provides herein: when
When elbow I3 is major radius elbow, pendulum radius R is greater than 2DN；When elbow I3 is short radius elbow, pendulum radius R is greater than
1.5DN。
The elbow I3 is 90 ° of elbows；The elbow II6 is any angle elbow.
As shown in Fig. 2, being demonstrated for movement of the invention, in which: A point is and the adjacent fixed point of whirl compensator 2；B point
For the two center line intersection points of elbow I3；C point is the hinge pin subpoint of single entry hinge expansion joint 5；D point is the two of elbow II6
Center line intersection point；E point is the distal affixation points of long straight pipe-line belonging to straight tube II7.When long straight pipe DE in the case where operating operating condition because of heat
When swollen shrinkage generates axial displacement of the lines, elbow II6 is pushed to move along the direction ED, correspondingly drives single entry hinge expansion joint 5 with wave
The mode of itself angular displacement of line pipe makes hinge pin with BC pendulum radius around B spot wobble.Meanwhile whirl compensator 2 and elbow
The connecting pin I3 and whirl compensator 2 and the connecting pin outer tube I1, that is, the core pipe and outer tube of whirl compensator 2 itself, with AB
Relative rotation occurs for axis.Meanwhile AB sections the expansion of micro line because elbow I3 presence and natural compensation, BD sections micro
Line expansion synchronous release when angular displacement occurs for single entry hinge expansion joint 5.
Embodiment two.
As shown in Fig. 3, Fig. 4 and Fig. 5, the present embodiment and the structure of embodiment one are essentially identical, and difference place is: in institute
The two center line intersection point clear distances for stating elbow II6 described in distance on straight tube II7 are less than setting bearing assembly I9 in the range of 5DN.Institute
The top for stating bearing assembly I9 is roller support, lower part FⅠType can be changed spring support.Installation point can provide follow it is described curved
The vertical spring bearing of whole process of head II6 upper and lower displacement, and rolling friction is formed in supporting-point horizontal displacement direction, pipeline can be met
When larger or heavier, because of the need that the above-mentioned movement of displacement compensation device causes related rigid bracket to cause stress exceeded due to coming to nothing
It wants.The roller support selects GB/T 17116.2-2018, pattern 185；The FⅠType can be changed spring support and select NB/T
47039-2013。
Embodiment three.
As shown in Figure 6 and Figure 7, the present embodiment and the structure of embodiment one are essentially identical, and difference place is: described curved
Bearing assembly II is set on head I, and the bearing assembly II includes the F of line contact elbow support and lower partⅡType can be changed spring branch
Frame.The line contact elbow support includes pipe support 101 and arc panel 102；The lower end of the column 101 is welded on the arc
On 102 upper surface of plate, the upper end is connect with the elbow I3 lower weld, and the center of the center line of column 101 and straight tube I4
Line is conllinear；The lower end surface of the arc panel 102 and the FⅡThe idler wheel that type can be changed spring support keeps line contact.The arc panel
102 with hinge pin to FⅡIt is radius of curvature that type, which can be changed the distance at the top of spring support idler wheel, with FⅡType can be changed spring support
Idler wheel constitutes the rolling friction pair of full displacement line contact, provides vertical spring bearing in displacement compensating movement whole process.The FⅡType
Variable spring support selects NB/T 47039-2013.
As shown in Fig. 2, Fig. 5 and Fig. 7, when angular displacement occurs for single entry hinge expansion joint 5, whirl compensator 2 revolves simultaneously
Rotational angle theta.By angular displacement, the displacement of the lines △ L of long straight pipe DE can be obtained:
△ L=Rsin θ --- formula 1, wherein R is the length of pendulum radius BC；
Meanwhile the displacement of the lines of long straight pipe DE is calculated by line expansion are as follows:
△ L=α1(Tmax- 20) L- α2(Tmin- 20) L --- formula 2,
Wherein L is the length of long straight pipe DE,
TmaxIt is the pipeline maximum temperature (DEG C) for including Pipe installing and all operating conditions, corresponding average linear expansion coefficient is α1
(10-6/ DEG C),
TminIt is the pipeline minimum temperature (DEG C) for including Pipe installing and all operating conditions, corresponding average linear expansion coefficient is α2
(10-6/ DEG C)；
In turn, if specified angular displacement ± θ, pipeline maximum temperature T of the known single entry hinge expansion joint under fatigue life allowablemax
With minimum temperature Tmin, then the maximum length L of the compensable long straight pipe DE of displacement compensation devicemaxAre as follows:
Lmax=2R × sin θ/[α1(Tmax- 20)-α2(Tmin- 20)] --- formula 3.
Further, the displacement compensation device bit shift compensation movement whole process in, rotating arm with whirl compensator from
By axis of AB relative rotation occurs for the core pipe and outer tube of body, and the hinge pin of the single entry hinge expansion joint of swing arm is around B
Point is swung in swinging plane using pendulum radius BC as radius, is rotated in conjunction with swing phase, realizing big displacement pipeline should
Corner adjusts the installation requirements of absolute altitude again.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (8)
1. a kind of displacement compensation device of space pipeline, including whirl compensator and single entry hinge expansion joint, it is characterized in that: described
One end of whirl compensator connects outer tube I, and the other end is connected with one end of elbow I；The other end of elbow I passes through straight tube I
It is connected with one end of the single entry hinge expansion joint；The other end of the single entry hinge expansion joint is connected with one end of elbow II；It should
The other end of elbow II is connected by straight tube II with outer tube II；The whirl compensator and plane where the elbow I and described
Single entry hinge expansion joint is mutually perpendicular to plane where the elbow II in space；The hinge pin of the single entry hinge expansion joint
Rotation axis with the whirl compensator is in space keeping parallelism；Fixed branch of the whirl compensator close to the outer tube I
Frame.
2. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: the elbow I is that major radius is curved
Head；Parallel clear distance between the hinge pin of the single entry hinge expansion joint and the rotation axis of the whirl compensator is greater than
2DN。
3. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: the elbow I is that short radius is curved
Head；Parallel clear distance between the hinge pin of the single entry hinge expansion joint and the rotation axis of the whirl compensator is greater than
1.5DN。
4. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: further including bearing assembly I, the branch
Bearing assembly I includes roller support and F interconnectedⅠType can be changed spring support；The roller support is located at the FⅠType can be changed bullet
The top of spring bracket, and be connected with the straight tube II；The two center line intersection points of the junction vertical center line and elbow II are net
Away from less than 5DN.
5. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: further include bearing assembly II, it should
Bearing assembly II includes line contact elbow support and F interconnectedⅡType can be changed spring support；The line contacts elbow support packet
Include pipe support and arc panel；The lower end of the column is connected with the arc panel upper surface, and upper end is connected with the elbow I；
The lower end surface of the arc panel and the FⅡThe idler wheel that type can be changed spring support keeps line contact.
6. the displacement compensation device of space pipeline according to claim 5, it is characterized in that: the radius of curvature of the arc panel
With the hinge pin of the single entry hinge expansion joint to the FⅡThe distance that type can be changed at the top of the idler wheel of spring support is suitable.
7. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: the elbow I is 90 ° of elbows；
The elbow II is any angle elbow.
8. the displacement compensation device of space pipeline according to claim 1, it is characterized in that: the whirl compensator with it is described
The connection direction of elbow I is that medium is made to flow to its housing pipe end from the core pipe end of the whirl compensator itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663738.9A CN110307428A (en) | 2019-07-23 | 2019-07-23 | A kind of displacement compensation device of space pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663738.9A CN110307428A (en) | 2019-07-23 | 2019-07-23 | A kind of displacement compensation device of space pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110307428A true CN110307428A (en) | 2019-10-08 |
Family
ID=68080382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910663738.9A Withdrawn CN110307428A (en) | 2019-07-23 | 2019-07-23 | A kind of displacement compensation device of space pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110307428A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396675A (en) * | 2020-04-27 | 2020-07-10 | 南京晨光东螺波纹管有限公司 | Displacement compensation device of curved pipeline and installation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2565319A1 (en) * | 1984-05-29 | 1985-12-06 | Mauff Gilbert Le | Rotary compensator for expansion of metal pipework. |
| CN201007396Y (en) * | 2007-02-16 | 2008-01-16 | 贵阳铝镁设计研究院 | Pipe bracket supporting device |
| CN103277624A (en) * | 2013-06-08 | 2013-09-04 | 洛阳双瑞特种装备有限公司 | Single hinge type expansion joint with angular displacement balancer |
| CN104315253A (en) * | 2014-10-30 | 2015-01-28 | 中色科技股份有限公司 | Movable support for aerially supporting large-diameter high-temperature flue |
| CN204366715U (en) * | 2014-12-22 | 2015-06-03 | 重庆市安太弹簧有限责任公司 | Spring end grinding machine |
| CN106764212A (en) * | 2016-12-30 | 2017-05-31 | 武汉德威工程技术有限公司 | The device for being combined with hinge compensator and solving pipeline part differential settlement is mended in rotation |
| CN208886228U (en) * | 2018-10-19 | 2019-05-21 | 中冶赛迪技术研究中心有限公司 | A kind of translation rotation comprehensive compensation structure and heat distribution pipeline |
| CN210462099U (en) * | 2019-07-23 | 2020-05-05 | 南京晨光东螺波纹管有限公司 | Displacement compensation device of space pipeline |
-
2019
- 2019-07-23 CN CN201910663738.9A patent/CN110307428A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2565319A1 (en) * | 1984-05-29 | 1985-12-06 | Mauff Gilbert Le | Rotary compensator for expansion of metal pipework. |
| CN201007396Y (en) * | 2007-02-16 | 2008-01-16 | 贵阳铝镁设计研究院 | Pipe bracket supporting device |
| CN103277624A (en) * | 2013-06-08 | 2013-09-04 | 洛阳双瑞特种装备有限公司 | Single hinge type expansion joint with angular displacement balancer |
| CN104315253A (en) * | 2014-10-30 | 2015-01-28 | 中色科技股份有限公司 | Movable support for aerially supporting large-diameter high-temperature flue |
| CN204366715U (en) * | 2014-12-22 | 2015-06-03 | 重庆市安太弹簧有限责任公司 | Spring end grinding machine |
| CN106764212A (en) * | 2016-12-30 | 2017-05-31 | 武汉德威工程技术有限公司 | The device for being combined with hinge compensator and solving pipeline part differential settlement is mended in rotation |
| CN208886228U (en) * | 2018-10-19 | 2019-05-21 | 中冶赛迪技术研究中心有限公司 | A kind of translation rotation comprehensive compensation structure and heat distribution pipeline |
| CN210462099U (en) * | 2019-07-23 | 2020-05-05 | 南京晨光东螺波纹管有限公司 | Displacement compensation device of space pipeline |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396675A (en) * | 2020-04-27 | 2020-07-10 | 南京晨光东螺波纹管有限公司 | Displacement compensation device of curved pipeline and installation method thereof |
| CN111396675B (en) * | 2020-04-27 | 2024-04-12 | 南京晨光东螺波纹管有限公司 | Displacement compensation device of curve pipeline and installation method thereof |
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Application publication date: 20191008 |
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