CN110671557A - Pipeline compensator adopting combined sealing structure - Google Patents
Pipeline compensator adopting combined sealing structure Download PDFInfo
- Publication number
- CN110671557A CN110671557A CN201910867714.5A CN201910867714A CN110671557A CN 110671557 A CN110671557 A CN 110671557A CN 201910867714 A CN201910867714 A CN 201910867714A CN 110671557 A CN110671557 A CN 110671557A
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- CN
- China
- Prior art keywords
- pipe
- ring
- sealing
- metal ring
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 78
- 229910052751 metal Inorganic materials 0.000 claims abstract description 89
- 239000002184 metal Substances 0.000 claims abstract description 89
- 238000012856 packing Methods 0.000 claims abstract description 47
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 11
- 210000004907 gland Anatomy 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 229910052895 riebeckite Inorganic materials 0.000 claims description 4
- 229910000838 Al alloy Chemical group 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
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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
- 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
- F16L27/0808—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 the joint elements extending coaxially for some distance from their point of separation
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/184—Tightening mechanisms
- F16J15/185—Tightening mechanisms with continuous adjustment of the compression of the packing
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/20—Packing materials therefor
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to a pipeline compensator adopting a combined sealing structure, which comprises an outer sleeve, a rotating core pipe and a packing gland, wherein sealing packing is arranged in a sealing cavity and comprises a pressure-variable metal ring and non-metal flexible packing, and the pressure-variable metal ring radially expands and deforms under the action of external force so that the inner side edge and the outer side edge of the pressure-variable metal ring are tightly matched with the side wall of the sealing cavity; the pressure-variable metal ring is tightly combined with the nonmetal flexible packing. The pressure-variable metal ring is formed by bending a hollow metal pipe or a metal sheet with a semicircular, arc-shaped or V-shaped section. A linear metal sealing ring is embedded between the side face of the outer flange step of the rotary core pipe and the opposite face of the inner convex ring of the outer sleeve, so that a positive correlation self-sealing effect can be formed along with the change of the medium pressure of the pipeline, and the sealing effect is further enhanced. The invention has the advantages of strong high temperature and high pressure resistance, good sealing performance, large bearing strength, long service life and convenient installation. Is especially suitable for high temperature and high pressure heating power pipe network, and is safe and reliable to use.
Description
Technical Field
The invention relates to the technical field of pipeline compensators, in particular to a pipeline compensator adopting a combined sealing structure.
Background
The pipe compensator generally needs to adopt a sealing filler to keep the pipe sealed and prevent the medium from leaking. The existing sleeve compensator compensates the displacement of a pipeline through the extension of the sliding core pipe, the sealing between the sliding core pipe and the filler cannot keep a good state for a long time, and the leakage is easy to generate after long-term use. A sealing filler cavity is arranged between the inner pipe and the outer pipe of the rotary compensator, sealing filler is filled in the sealing cavity, and the sealing filler is compressed by a filler gland to realize sealing. The fit clearance is great between rotary compensator's the rotary part, receives pipeline thrust effect, and the poor stability of interior outer tube relative rotation easily produces the eccentric deflection of disalignment, increases the rotation resistance for wearing and tearing easily or by crushing in the high-pressure pipeline, can influence the sealing performance of sealing filler after using a period promptly, lead to sealed inefficacy, appear leaking. If the detection and the maintenance are not timely, safety production accidents can even be caused.
The existing pipeline compensator generally adopts graphite packing or asbestos packing as sealing packing, and has a good sealing effect under a common working condition. For pipelines for conveying high-temperature and high-pressure media, the packing materials are greatly lost in the deflection and displacement processes of the compensator due to the inevitable assembly clearance of the pipeline compensator and the lower strength of the traditional sealing packing and the action of the high-temperature and high-pressure media. On the other hand, the assembly gap of the conventional pipe compensator is usually designed to be tightly attached to the outer surface of the inner core pipe, and in the working process, a medium can permeate to the root of the sealing filler along the assembly gap, so that the sealing filler is accelerated to be lost and blown away. The labyrinth effect failure of the function of preventing the medium leakage is easily caused by the design, so that the loss of the sealing packing of the compensator is large, the leakage is easy, and the service life is short.
Disclosure of Invention
The invention aims to provide the pipeline compensator with the combined sealing structure, which has the advantages of strong high temperature and high pressure resistance, good sealing effect, high bearing strength, flexible operation, long service life and convenient installation.
The purpose of the invention is realized by adopting the following technical scheme:
the pipeline compensator adopting the combined sealing structure comprises an outer sleeve, a rotary core pipe and a packing gland, wherein the rotary core pipe is arranged in the outer sleeve, the end surface of the packing gland, the inner surface of the outer sleeve and the outer surface of the rotary core pipe form a packing sealing cavity, sealing packing is arranged in the sealing cavity and comprises a pressure-variable metal ring and non-metal flexible packing, and the pressure-variable metal ring can generate radial expansion and deformation under the action of external force so that the inner side edge and the outer side edge of the pressure-variable metal ring are tightly matched with the side wall of the sealing cavity; meanwhile, the pressure variable metal ring is tightly combined with the nonmetal flexible packing, so that the sealing effect is achieved.
In a preferred embodiment of the present invention, the buckling-type metal ring is formed by bending a hollow metal tube or a metal sheet having a semicircular, arc-shaped or V-shaped cross section.
As a preferable technical scheme of the invention, the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe.
As a preferred technical scheme of the invention, the pressure-variable metal ring comprises a closed metal ring or a C-shaped metal ring with one side opened.
As a preferred technical scheme of the invention, the sealing filler comprises at least two layers of pressure-variable metal rings and two layers of non-metal flexible fillers, wherein the first pressure-variable metal ring is arranged at the bottom of the sealing cavity, and then the first non-metal flexible filler, the second pressure-variable metal ring and the second non-metal flexible filler are sequentially arranged.
In a preferred embodiment of the present invention, the first dilatant metal ring is formed by bending a hollow metal tube, and the second dilatant metal ring is formed by bending an arc-shaped or V-shaped metal piece.
In a preferred embodiment of the present invention, the first dilatant metal ring is a closed metal ring with a welded end, and the second dilatant metal ring is a C-shaped metal ring with an opening at one side.
As a preferred technical scheme of the invention, the pressure-variable metal ring is a copper ring or an aluminum alloy ring, and the non-metal flexible packing is a graphite packing or an asbestos packing.
As a preferred technical scheme of the invention, the inner wall of the outer sleeve is provided with an inner convex ring, the end part of the rotating core tube is provided with a step-shaped outer flange matched with the inner convex ring, and an assembly gap formed between the outer flange and the inner convex ring is positioned in the middle of the bottom of the sealing cavity.
As the preferred technical scheme of the invention, the outer flange of the rotating core pipe is provided with at least two steps, and a linear metal sealing ring is arranged between the side surface of the upper step and the opposite surface of the inner convex ring; the outer sleeve is a rotary reducer pipe with an integral structure, and the inner diameter of an end pipe of the outer sleeve is equal to that of the rotary core pipe.
The invention has the beneficial effects that: compared with the prior art, the invention adopts the pressing variable metal ring which is soft and easy to stretch and the nonmetal flexible packing to form the composite sealing structure under the action of external force, so that the metal ring and the flexible packing are expanded in the radial direction, and the edges of the inner side and the outer side of the metal ring and the flexible packing are tightly matched with the side wall of the sealing cavity; meanwhile, a linear metal sealing ring is embedded between the side face of the outer flange step of the rotating core pipe and the opposite face of the inner convex ring of the outer sleeve, and the sealing ring can form positive correlation self-sealing effect along with the change of the medium pressure of the pipeline, so that the sealing effect is further enhanced.
When the compensator works, the pressure-variable metal ring is placed at the bottom of the sealing cavity, so that the direct contact of high-temperature and high-pressure media and the flexible sealing filler can be separated, the loss of the flexible filler is effectively reduced, and the effects of prolonging the service life of the sealing filler and strengthening the sealing are achieved. The linear metal sealing ring and the pressure-variable metal ring form end face sealing in a pressure-bearing state, so that the friction force is small, the sealing effect is good, and the flexible operation of the compensator is facilitated. Not only forming end face seal, but also playing the roles of anti-drop and antifriction.
The invention has the advantages of strong high temperature and high pressure resistance, good sealing performance, large bearing strength, long service life and convenient installation. It is especially suitable for high temperature and high pressure heat distribution pipe network, and is safe and reliable in use, and favorable for energy saving and environment protection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the pressure-variable type metal ring comprises a pressure-variable type metal ring 2, a linear type metal sealing ring 3, an outer sleeve 4, flexible packing 5, a packing gland 6, a rotating core pipe 31, an inner convex ring 32, an end pipe 61 and a step-shaped outer flange.
Detailed Description
The invention will be further described with reference to the following detailed description of embodiments and with reference to the accompanying drawings in which:
as shown in fig. 1, the pipeline compensator adopting the combined sealing structure comprises an outer sleeve 3, a rotary core pipe 6 and a packing gland 5, wherein the rotary core pipe 6 is arranged in the outer sleeve 3, the end surface of the packing gland 5, the inner surface of the outer sleeve 3 and the outer surface of the rotary core pipe 6 form a packing sealing cavity, sealing packing is arranged in the sealing cavity and comprises a pressure-variable metal ring 1 and non-metal flexible packing 4, and the pressure-variable metal ring 1 can radially expand and deform under the action of external force so that the inner side edge and the outer side edge of the pressure-variable metal ring are tightly matched with the side wall of the sealing cavity; meanwhile, the pressure-variable metal ring 1 is tightly combined with the flexible packing 4, so that a sealing effect is achieved.
In this embodiment, the pressure-variable metal ring 1 is formed by bending a hollow metal tube or a metal sheet with a semicircular, arc-shaped or V-shaped cross section; the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe; the compression-type metal ring 1 includes a closed-type metal ring whose connection end is welded, or a C-shaped metal ring whose one side is opened.
The sealing packing in this embodiment sealing cavity includes that three-layer presses variable becket 1 and two-layer nonmetal flexible packing 4, and first presses variable becket to establish in the bottom in sealing cavity, then presses variable becket, second to press variable becket, the nonmetal flexible packing of second, third to press variable becket in proper order. The first pressure variable metal ring is formed by bending a hollow metal pipe, the second pressure variable metal ring is formed by bending an arc-shaped metal sheet, and the third pressure variable metal ring is formed by bending a V-shaped metal sheet. The first pressure-variable metal ring is a closed metal ring with a welded port, and the second and third pressure-variable metal rings are C-shaped metal rings with one side opened. The pressure-variable metal ring 1 is a copper ring or an aluminum alloy ring, and the flexible packing 4 is a graphite packing or an asbestos packing.
An inner convex ring 31 is arranged on the inner wall of the outer sleeve 3, a step-shaped outer flange 61 matched with the inner convex ring 31 is arranged at the end part of the rotating core tube 6, and an assembly gap formed between the outer flange 61 and the inner convex ring 31 is positioned in the middle of the bottom of the sealing cavity. An outer flange 61 of the rotating core pipe 6 is provided with an upper step and a lower step, and a linear metal sealing ring 2 is arranged between the side surface of the upper step and the opposite surface of the inner convex ring 31. The outer sleeve 3 is a rotary reducer with an integral stretching structure, and the inner diameter of the end pipe 32 of the outer sleeve 3 is equal to that of the rotary core pipe 6.
The above examples are only for illustrating the concept and technical features of the present invention, and are intended to enable those skilled in the art to understand the technical scheme and implementation manner of the present invention, and the protection scope of the present invention is not limited thereby. All equivalents and changes equivalent to the technical solution of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides an adopt combined seal structure's pipeline compensator, includes outer tube, rotatory core pipe and gland, and rotatory core pipe is established at the outer tube, and gland's terminal surface and the internal surface of outer tube, the surface of rotatory core pipe constitute the sealed chamber of packing, are equipped with sealing filler, characterized by in the sealed chamber: the sealing packing comprises a pressure variable metal ring and a nonmetal flexible packing, and the pressure variable metal ring can radially expand and deform under the action of external force, so that the inner side edge and the outer side edge of the pressure variable metal ring are tightly matched with the side wall of the sealing cavity; meanwhile, the pressure variable metal ring is tightly combined with the nonmetal flexible packing, so that the sealing effect is achieved.
2. The pipe compensator with the combined sealing structure as set forth in claim 1, wherein: the pressure-variable metal ring is formed by bending a hollow metal pipe or a metal sheet with a semicircular, arc-shaped or V-shaped section.
3. The pipe compensator with the combined sealing structure as set forth in claim 2, wherein: the metal hollow pipe comprises a hollow round pipe or an oval hollow pipe.
4. The pipe compensator with the combined sealing structure as set forth in claim 1, wherein: the pressure-variable metal ring comprises a closed metal ring or a C-shaped metal ring with one side opened.
5. The pipe compensator with the combined sealing structure as set forth in claim 1, wherein: the sealing packing comprises at least two layers of variable metal rings and two layers of non-metal flexible packing, wherein the first variable metal ring is arranged at the bottom of the sealing cavity, and then the first non-metal flexible packing, the second variable metal ring and the second non-metal flexible packing are sequentially arranged.
6. The pipe compensator of claim 5, wherein: the first pressure variable metal ring is formed by bending a hollow metal pipe, and the second pressure variable metal ring is formed by bending an arc-shaped or V-shaped metal sheet.
7. The pipe compensator of claim 6, wherein: the first pressure variable metal ring is a closed metal ring with a welded port, and the second pressure variable metal ring is a C-shaped metal ring with an opening at one side.
8. The pipe compensator with the combined sealing structure as set forth in claim 1, wherein: the pressure-variable metal ring is a copper ring or an aluminum alloy ring, and the non-metal flexible packing is a graphite packing or an asbestos packing.
9. The pipe compensator using a combined sealing structure according to any one of claims 1 to 8, wherein: an inner convex ring is arranged on the inner wall of the outer sleeve, a step-shaped outer flange matched with the inner convex ring is arranged at the end part of the rotating core tube, and an assembly gap formed between the outer flange and the inner convex ring is positioned in the middle of the bottom of the sealing cavity.
10. The pipe compensator of claim 9, wherein: at least two stages of steps are arranged on the outer flange of the rotating core pipe, and a linear metal sealing ring is arranged between the side surface of the upper step and the opposite surface of the inner convex ring; the outer sleeve is a rotary reducer pipe with an integral structure, and the inner diameter of an end pipe of the outer sleeve is equal to that of the rotary core pipe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867714.5A CN110671557A (en) | 2019-09-14 | 2019-09-14 | Pipeline compensator adopting combined sealing structure |
| PCT/CN2020/115049 WO2021047671A1 (en) | 2019-09-14 | 2020-09-14 | Pipeline compensator using combined sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867714.5A CN110671557A (en) | 2019-09-14 | 2019-09-14 | Pipeline compensator adopting combined sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110671557A true CN110671557A (en) | 2020-01-10 |
Family
ID=69076844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910867714.5A Pending CN110671557A (en) | 2019-09-14 | 2019-09-14 | Pipeline compensator adopting combined sealing structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110671557A (en) |
| WO (1) | WO2021047671A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021047671A1 (en) * | 2019-09-14 | 2021-03-18 | 江苏永力管道有限公司 | Pipeline compensator using combined sealing structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160551A (en) * | 1977-10-03 | 1979-07-10 | Engineering Enterprises, Inc. | Seal assembly |
| CN2291557Y (en) * | 1997-06-11 | 1998-09-16 | 蒿国全 | High-pressure pipeline expansion compensation anti-separation connecting device |
| EP1925859A1 (en) * | 2006-11-24 | 2008-05-28 | Grupo Sagola Sociedad de Promocion de Empresas, S.L. | Packing gland for spray guns |
| CN201359156Y (en) * | 2009-03-10 | 2009-12-09 | 陈墅庚 | High-voltage resistant precise rotary compensator |
| CN204164550U (en) * | 2014-10-17 | 2015-02-18 | 金川集团股份有限公司 | A kind of pipeline extension device of triple seal structure |
| CN107270001A (en) * | 2017-07-29 | 2017-10-20 | 江苏永力管道有限公司 | High pressure is double-current to whirl compensator |
| CN211059558U (en) * | 2019-09-14 | 2020-07-21 | 江苏永力管道有限公司 | Pipeline compensator adopting combined sealing structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3936079A (en) * | 1974-07-05 | 1976-02-03 | Bror Thure Fridolf Ekman | Coupling or jointing unit |
| CN105221887A (en) * | 2015-11-01 | 2016-01-06 | 江苏新方圆电气设备制造有限公司 | High-performance sleeve compensator |
| CN206600545U (en) * | 2016-11-30 | 2017-10-31 | 航天晨光股份有限公司 | A kind of high-pressure resistant self-sealing rotating compensator |
| CN109707945B (en) * | 2018-12-05 | 2021-12-28 | 洛阳双瑞特种装备有限公司 | High-temperature-resistant high-pressure compensator |
| CN209278709U (en) * | 2018-12-29 | 2019-08-20 | 江苏耀宇新型管业有限公司 | More sealing rotary compensators |
| CN110671557A (en) * | 2019-09-14 | 2020-01-10 | 江苏永力管道有限公司 | Pipeline compensator adopting combined sealing structure |
-
2019
- 2019-09-14 CN CN201910867714.5A patent/CN110671557A/en active Pending
-
2020
- 2020-09-14 WO PCT/CN2020/115049 patent/WO2021047671A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160551A (en) * | 1977-10-03 | 1979-07-10 | Engineering Enterprises, Inc. | Seal assembly |
| CN2291557Y (en) * | 1997-06-11 | 1998-09-16 | 蒿国全 | High-pressure pipeline expansion compensation anti-separation connecting device |
| EP1925859A1 (en) * | 2006-11-24 | 2008-05-28 | Grupo Sagola Sociedad de Promocion de Empresas, S.L. | Packing gland for spray guns |
| CN201359156Y (en) * | 2009-03-10 | 2009-12-09 | 陈墅庚 | High-voltage resistant precise rotary compensator |
| CN204164550U (en) * | 2014-10-17 | 2015-02-18 | 金川集团股份有限公司 | A kind of pipeline extension device of triple seal structure |
| CN107270001A (en) * | 2017-07-29 | 2017-10-20 | 江苏永力管道有限公司 | High pressure is double-current to whirl compensator |
| CN211059558U (en) * | 2019-09-14 | 2020-07-21 | 江苏永力管道有限公司 | Pipeline compensator adopting combined sealing structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021047671A1 (en) * | 2019-09-14 | 2021-03-18 | 江苏永力管道有限公司 | Pipeline compensator using combined sealing structure |
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| Publication number | Publication date |
|---|---|
| WO2021047671A1 (en) | 2021-03-18 |
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