CN111828752B - Flexible connecting device for pipeline - Google Patents
Flexible connecting device for pipeline Download PDFInfo
- Publication number
- CN111828752B CN111828752B CN202010676817.6A CN202010676817A CN111828752B CN 111828752 B CN111828752 B CN 111828752B CN 202010676817 A CN202010676817 A CN 202010676817A CN 111828752 B CN111828752 B CN 111828752B
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- Prior art keywords
- pipeline
- wall
- pressing
- connecting body
- ring
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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
- F16L27/10—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations
- F16L27/1008—Adjustable joints, Joints allowing movement comprising a flexible connection only, e.g. for damping vibrations comprising a swivel nut or collar engaging the pipe
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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
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/063—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends by means of conical threaded surfaces
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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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention provides a pipeline flexible connection device, relates to the technical field of pipeline connection, and solves the technical problem that two pipelines with installation errors in the prior art are rigidly connected and can damage the pipelines. The pipeline soft connecting device comprises a pair of connecting bodies, wherein the middle part of the outer surface of each connecting body is provided with a baffle ring, one side of each baffle ring is provided with a pressing component, and the connecting body on the other side of each baffle ring is provided with a first external thread; the fixing sleeve comprises an annular retaining shoulder, a supporting component is arranged on one side of the annular retaining shoulder, and a first internal thread matched with the first external thread is formed in the supporting component; the pressing ring is arranged on the outer side of the pressing assembly; the connecting pipe is provided with the flexibility, the fixing sleeve and the connecting body are used for fixing one end of the pipeline, the compression ring, the compression assembly and the connecting body are used for fixing one end of the connecting pipe, so that two ends of the connecting pipe are firmly connected with the pipeline respectively, the two pipelines are communicated by virtue of the flexible connecting pipe, and the problem that the two pipelines with installation errors are damaged by rigid connection is solved.
Description
Technical Field
The invention relates to the technical field of pipeline connection, in particular to a flexible pipeline connecting device.
Background
A pipeline is a device for transporting a gas, liquid or fluid with solid particles, connected by pipes, pipe couplings, valves, etc. The pipelines are usually rigidly connected in application, when the arrangement of the pipelines has errors, the axes of the two connected pipelines cannot be aligned, so that the two connected pipelines are difficult to connect, if the rigid connection is adopted forcibly, the pipelines can be damaged, and even the connection part between the pipelines cannot have sealing performance, so that the substances conveyed in the pipelines are leaked; the connection of the connecting parts between the pipelines is not firm and is easy to fall off; simultaneously, adopt rigid connection between the pipeline and when the pipeline conveying has vibrations, vibrations can transmit next pipeline through rigid connection department, can not guarantee the stability of pipeline conveying, and pipeline vibrations simultaneously can arouse that the mounting of fixed pipeline is not hard up, makes the pipeline drop and causes the incident.
Disclosure of Invention
The invention aims to provide a pipeline flexible connection device, which aims to solve the technical problem that rigid connection of two pipelines with installation errors in the prior art can damage the pipelines.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a pipeline flexible connection device, which is used for communicating two pipelines and comprises:
the connecting body is of a hollow cylindrical structure, a baffle ring is arranged in the middle of the outer surface of the connecting body, a pressing assembly is arranged on one side of the baffle ring, the free end of the pressing assembly extends along the axis of the connecting body, and the pressing assembly, the baffle ring and the connecting body jointly define a first space; the outer wall of the connecting body on the other side of the baffle ring is provided with a first external thread;
the fixing sleeve comprises an annular retaining shoulder, a supporting component is arranged on one side of the annular retaining shoulder, the free end of the supporting component extends along the axis of the annular retaining shoulder, the thickness of the supporting component from the position where the supporting component is arranged on the annular retaining shoulder to the free end of the supporting component is gradually increased, and a first internal thread matched with the first external thread is formed in the inner wall surface of the supporting component;
the compression ring is arranged on the outer side of the compression assembly;
a connection pipe having flexibility; wherein the content of the first and second substances,
one end of the pipeline is sleeved on the outer wall of the supporting component, one end of the connecting body extends into the annular retaining shoulder, and the first external thread is matched with the first internal thread, so that the supporting component is expanded to tightly support the inner wall of the pipeline; one end of the connecting pipe extends into the first space, and the compression ring reduces the first space so as to clamp the connecting pipe between the compression assembly and the connecting body.
Optionally, the support assembly includes at least three support members, and the first ends of all the support members are uniformly disposed on the annular blocking shoulder.
Optionally, the pressing assembly includes at least three pressing members, and the first ends of all the pressing members are uniformly disposed on the baffle ring.
Optionally, the thickness of the pressing member increases progressively in a direction from one end close to the retainer ring to one end far away from the retainer ring, a second external thread is formed on one side of each pressing member far away from the connecting body, and a second internal thread matched with the second external thread is formed on the inner wall of the pressing ring.
Optionally, a sealing structure is arranged between the inner wall of the pipeline and the supporting assembly; and a sealing structure is arranged between the compressing assembly and the connecting pipe.
Optionally, one side of the support assembly, which is close to the sealing structure, is uniformly provided with protrusions with annular sections; and bulges with annular sections are uniformly arranged on one side of the compressing assembly close to the sealing structure.
Optionally, the outer wall of the pipeline corresponding to the supporting component is provided with a hoop.
Optionally, the outer wall of the compression ring is provided with an anti-slip structure.
Optionally, the outer wall of the connecting pipe is provided with a protective sleeve.
Optionally, the protective sleeve is a corrugated pipe, and an end of the corrugated pipe is fixed to the circumferential outer wall of the baffle ring.
The invention provides a pipeline flexible connection device which comprises a pair of connection bodies, wherein each connection body is of a hollow cylindrical structure, a baffle ring is arranged in the middle of the outer surface of each connection body, a pressing assembly is arranged on one side of each baffle ring, the pressing assemblies, the baffle rings and the connection bodies jointly define a first space, and first external threads are formed in the outer wall of each connection body on the other side of each baffle ring; the fixing sleeve comprises an annular retaining shoulder, a supporting component is arranged on one side of the annular retaining shoulder, the thickness of the supporting component from the position of the annular retaining shoulder to the free end of the supporting component is gradually increased, and a first internal thread matched with the first external thread is formed in the supporting component; the compression ring is arranged on the outer side of the compression assembly; the connecting device is provided with a flexible connecting pipe, one end of the pipeline is sleeved on the outer wall of the supporting component, one end of the connecting body extends into the annular retaining shoulder, and the first external thread is matched with the first internal thread, so that the supporting component is expanded to tightly support the inner wall of the pipeline; one end of the connecting pipe extends into the first space, the compression ring enables the first space to be reduced so as to enable the connecting pipe to be clamped between the compression assembly and the connecting body, two ends of the connecting pipe are respectively and firmly connected with the pipeline, the two pipelines are communicated by virtue of the flexible connecting pipe, and the problem that the two pipelines with installation errors are damaged by rigid connection is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an assembled view of a flexible pipe coupling according to the present invention;
FIG. 2 is a disassembled schematic view of the flexible connection device for the pipeline;
fig. 3 is a schematic structural view of the fixing sleeve.
In figure 1, a body is connected; 2. a baffle ring; 3. a first external thread; 4. an annular shoulder; 5 a first internal thread; 6. a compression ring; 7. a pipeline; 8. a connecting pipe; 9. a support member; 10. a compression member; 11. a second external thread; 12. a second internal thread; 13. a sealing structure; 14. a protrusion; 15. hooping; 16. and (4) an anti-skid structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a soft connecting device for a pipeline 7, which is used for communicating two pipelines 7, and comprises the following components as shown in figures 1-3:
a pair of connecting bodies (1) are provided,
the connecting body 1 is of a hollow cylindrical structure, a baffle ring 2 is arranged in the middle of the outer surface of the connecting body, a pressing assembly is arranged on one side of the baffle ring 2, the free end of the pressing assembly extends along the axis of the connecting body 1, and the pressing assembly, the baffle ring 2 and the connecting body 1 jointly define a first space; the outer wall of the connecting body 1 on the other side of the baffle ring 2 is provided with a first external thread 3, wherein the pair of connecting bodies 1 are respectively connected to the interfaces of the two pipelines 7, meanwhile, the two ends of the connecting pipe 8 for connecting the two pipelines 7 are respectively connected to the corresponding connecting bodies 1, and when the pair of connecting bodies 1 are used, the position relation is similar to mirror symmetry.
A fixing sleeve is arranged on the upper end of the sleeve,
the connecting device comprises an annular retaining shoulder 4, a supporting component is arranged on one side of the annular retaining shoulder 4, the free end of the supporting component extends along the axis of the annular retaining shoulder 4, the thickness of the supporting component from the position of the annular retaining shoulder 4 to the free end of the supporting component is gradually increased, a first internal thread 5 matched with the first external thread 3 is arranged on the inner wall surface of the supporting component, wherein the supporting component is tightly attached to the inner wall of a pipeline 7 and extends into the pipeline 7 until the annular retaining shoulder 4 is contacted with the pipeline 7 so as to limit the length of the supporting component extending into the pipeline 7, one end of a connecting body 1 with the first external thread 3 extends into the annular retaining shoulder 4 and rotates, so that the first external thread 3 is matched with a second internal thread, along with the increase of the screwing-in depth of one end of the connecting body 1, one end of the connecting body 1 can support the supporting component with the gradually increased thickness so as to increase the integral diameter of the supporting component, the fixing sleeve is firmly limited in the pipeline 7 through the friction force between the whole supporting assembly with the increased diameter and the inner wall of the pipeline 7, so that the connecting body 1 and the pipeline 7 are fixed.
The compression ring (6) is provided with a compression ring,
the pressing component is arranged on the outer side of the pressing component, and the pressing component can be contracted to reduce the overall diameter of the pressing component.
A connecting tube 8 is connected to the outside of the container,
connecting pipe 8 has the flexibility for making two pipelines 7 be connected, can avoid having two pipelines 7 of installation error to adopt rigid connection can harm the problem of pipeline 7, simultaneously, connecting pipe 8 that has the flexibility can absorb vibrations, avoid vibrations continuous drive in pipeline 7, can avoid the transmission of noise, can effectively avoid simultaneously taking off at the pipeline 7 connecting piece pine because of vibrations, the problem that makes pipeline 7 drop has guaranteed the security that pipeline 7 used.
According to the invention, one end of a pipeline 7 is sleeved on the outer wall of the supporting component, one end of the connecting body 1 extends into the annular retaining shoulder 4, and the first external thread 3 is matched with the first internal thread 5, so that the supporting component is expanded to tightly support the inner wall of the pipeline 7; 8 one end of connecting pipe stretches into first space, clamp ring 6 makes first space reduces and then makes 8 centre gripping of connecting pipe in compress tightly the subassembly with between the connecting body 1, make and to be firm fixed between pipeline 7, connecting body 1 and the connecting pipe 8, make and be difficult for droing between the three, guaranteed the reliability that pipeline 7 connects.
As an alternative embodiment, the supporting assembly includes at least three supporting members 9, the first ends of all the supporting members 9 are uniformly arranged on the annular blocking shoulder 4, and the free end of each supporting member 9 can move in the radial direction, specifically, the supporting assembly includes three supporting members 9, the three supporting members 9 are enclosed into a cylindrical structure matched with the inner wall of the pipeline 7, when the connecting body 1 advances along the thread, the free ends of the supporting members 9 generate outward radial displacement, so that the overall diameter of the three supporting members 9 is enlarged, and the connection between the fixing sleeve and the pipeline 7 is further completed; furthermore, the width of the supporting piece 9 from the end fixed with the annular retaining shoulder 4 to the free end is gradually reduced, so that the frictional resistance between the connecting body 1 and the supporting component can be reduced, and the rotation of the connecting body 1 is more labor-saving.
As an alternative embodiment, the pressing assembly includes at least three pressing members 10, the first ends of all the pressing members 10 are uniformly arranged on the baffle ring 2, the free end of each pressing member 10 can move in the radial direction, specifically, the pressing assembly includes three pressing members 10, the three pressing members 10 are enclosed into a cylindrical structure matched with the outer wall of the connecting pipe 8, and under the action of the pressing ring 6, the free ends of the pressing members 10 generate inward displacement in the radial direction, so that the overall diameter of the three supporting members 9 is reduced, and the connection between the connecting body 1 and the connecting pipe 8 is completed.
As an optional embodiment, the thickness of the pressing pieces 10 increases gradually from the end close to the retainer ring 2 to the end far from the retainer ring 2, and a second external thread 11 is formed on one side of all the pressing pieces 10 far from the connecting body 1, and a second internal thread 12 adapted to the second external thread 11 is formed on the inner wall of the pressing ring 6, wherein all the pressing pieces 10 are arranged in close contact with the outer wall of the connecting pipe 8, the pressing ring 6 is rotated along the thread to move the pressing ring 6 in the direction in which the thickness of the pressing pieces 10 increases, during the movement of the pressing ring 6, the free ends of the pressing pieces 10 are displaced inwards to enable the pressing pieces 10 to clasp the outer wall of the connecting pipe 8, so as to firmly limit the displacement between the connecting pipe 8 and the connecting body 1, further, the width of the pressing pieces 10 from the end fixed to the free end of the retainer ring 2 decreases gradually, so as to reduce the frictional resistance between the pressing pieces 10 and the pressing assembly, the rotation of the pressing member 10 is made more labor-saving.
As an optional implementation manner, a sealing structure 13 is arranged between the inner wall of the pipeline 7 and the support assembly, wherein the sealing structure 13 is a sealing gasket, and the sealing gasket is arranged along the circumferential direction of the inner wall of the pipeline 7, so that the leakage of substances in the pipeline 7 can be effectively avoided; a sealing structure 13 is arranged between the compressing assembly and the connecting pipe 8, wherein the sealing assembly is a sealing gasket which is arranged along the circumferential direction of the outer wall of the connecting pipe 8, so that the leakage of substances in the pipeline 7 from a joint can be effectively avoided, and further, the sealing gasket is also arranged between the inner wall of the connecting pipe 8 and the connecting body 1, so that the leakage can be further prevented, and the reliability of connection is ensured; wherein, the material of the sealing gasket is rubber and other flexible materials.
As an alternative embodiment, a protrusion 14 with an annular cross section is uniformly arranged on one side of the support assembly close to the sealing structure 13; one side of the compressing assembly close to the sealing structure 13 is uniformly provided with a bulge 14 with an annular cross section, and the bulge 14 can increase friction force and avoid easy falling of the connected two.
As an optional embodiment, the outer wall of the pipeline 7 corresponding to the supporting component is provided with a hoop 15, which can effectively protect the pipeline 7 and prevent the pipeline 7 from being broken.
In an alternative embodiment, the outer wall of the compression ring 6 is provided with an anti-slip structure 16 to facilitate rotation of the compression ring 6.
As an alternative embodiment, the outer wall of the connecting pipe 8 is provided with a protective sleeve, which can protect the connecting pipe 8 and make the pipeline 7 work reliably.
In an alternative embodiment, the protective sleeve is a corrugated pipe, and an end of the corrugated pipe is fixed on the circumferential outer wall of the baffle ring 2.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A flexible connection device for connecting two pipelines is characterized by comprising:
the connecting device comprises a pair of connecting bodies, a pair of connecting bodies and a pair of connecting bodies, wherein any connecting body is of a hollow cylindrical structure, a baffle ring is arranged in the middle of the outer surface of each connecting body, a pressing assembly is arranged on one side of each baffle ring, the free end of each pressing assembly extends along the axis of each connecting body, and the pressing assembly, the baffle ring and the connecting bodies define a first space together; the outer wall of the connecting body on the other side of the baffle ring is provided with a first external thread;
the thickness of the supporting component is gradually increased from the position where the supporting component is arranged on the annular retaining shoulder to the free end of the supporting component, and a first internal thread matched with the first external thread is formed on the inner wall surface of the supporting component;
the pair of compression rings are arranged on the outer sides of the corresponding compression assemblies;
the connecting pipe is flexible, the connecting bodies are arranged at two ends of the connecting pipe respectively, and any connecting body is connected with the corresponding pipeline respectively;
the connecting structure that any pipeline is connected with one end of the corresponding connecting pipe through the connecting body, the fixing sleeve and the compression ring is that one end of the pipeline is sleeved on the outer wall of the supporting component, one end of the connecting body extends into the annular retaining shoulder, the first external thread is matched with the first internal thread, and the supporting component is expanded to tightly support the inner wall of the pipeline; one end of the connecting pipe extends into the first space, and the compression ring reduces the first space so that the connecting pipe is clamped between the compression assembly and the connecting body;
the pressing assembly comprises at least three pressing pieces, and the first ends of all the pressing pieces are uniformly arranged on the baffle ring;
the thickness of the pressing piece is gradually increased from one end close to the retaining ring to the direction far away from one end of the retaining ring, a second external thread is arranged on one side, far away from the connecting body, of each pressing piece, and a second internal thread matched with the second external thread is arranged on the inner wall of the pressing ring.
2. The flexible pipe coupling according to claim 1, wherein said support assembly comprises at least three support members, the first ends of all of said support members being disposed uniformly over said annular shoulder.
3. The flexible pipe connection device according to claim 1, wherein a sealing structure is arranged between the inner wall of the pipe and the support assembly; and a sealing structure is arranged between the compressing assembly and the connecting pipe.
4. The flexible pipe connection device according to claim 3, wherein a protrusion with an annular cross section is uniformly arranged on one side of the support assembly close to the sealing structure; and bulges with annular sections are uniformly arranged on one side of the compressing assembly close to the sealing structure.
5. The flexible pipe coupling of claim 1, wherein the outer wall of the pipe corresponding to the support assembly is provided with a hoop.
6. The flexible pipe connection of claim 1, wherein the clamp ring outer wall is provided with an anti-slip structure.
7. A pipeline flexible connection device according to any one of claims 1 to 6, characterized in that the outer wall of the connection pipe is provided with a protective sheath.
8. The flexible pipe connection according to claim 7, wherein the protective sleeve is a bellows, and an end of the bellows is fixed to the outer circumferential wall of the baffle ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676817.6A CN111828752B (en) | 2020-07-14 | 2020-07-14 | Flexible connecting device for pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676817.6A CN111828752B (en) | 2020-07-14 | 2020-07-14 | Flexible connecting device for pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111828752A CN111828752A (en) | 2020-10-27 |
| CN111828752B true CN111828752B (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010676817.6A Active CN111828752B (en) | 2020-07-14 | 2020-07-14 | Flexible connecting device for pipeline |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112555542B (en) * | 2020-12-21 | 2022-04-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Pipe connection structure and pipe connection method |
| CN115013620A (en) * | 2022-06-01 | 2022-09-06 | 高拓微通传热技术(北京)有限公司 | Welding-free type hydrogen cooler pipe orifice connecting mechanism |
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| CN1621729A (en) * | 2004-12-16 | 2005-06-01 | 葛文宇 | Flexible jointing method of cement pipeline with major diameter |
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| IE54194B1 (en) * | 1982-06-30 | 1989-07-05 | Boots Co Plc | Medical connector |
| DE102008002926B3 (en) * | 2008-07-01 | 2010-05-20 | Weinhold, Karl, Dipl.-Ing. (FH) | Apparatus for connecting pipes subject to axial length changes |
| FR2975162B1 (en) * | 2011-05-09 | 2014-03-21 | Airbus Operations Sas | DEVICE FOR CONNECTING FUEL PIPES FOR AN AIRCRAFT |
| CN203431356U (en) * | 2013-08-22 | 2014-02-12 | 路达(厦门)工业有限公司 | Hose joint structure |
| CN204785169U (en) * | 2015-05-25 | 2015-11-18 | 天津世创机械制造有限公司 | Pipeline connecting structure |
| CN204942813U (en) * | 2015-07-16 | 2016-01-06 | 慈溪市宗汉中正快速接头厂（普通合伙） | A kind of transit joint |
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| CN206582440U (en) * | 2017-01-24 | 2017-10-24 | 上海亚大汽车塑料制品有限公司 | Fuel tank connects flexible pipe |
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| CN209146577U (en) * | 2018-11-29 | 2019-07-23 | 河南中泽新材料股份有限公司 | Compression type pipe connection device |
| CN210153366U (en) * | 2019-05-30 | 2020-03-17 | 中铁十七局集团第三工程有限公司 | Pipe connecting piece |
| CN210770762U (en) * | 2019-07-08 | 2020-06-16 | 安徽安凯特管业科技有限公司 | Exempt from detachable metal bellows spare of sealing member |
| CN110529680A (en) * | 2019-09-28 | 2019-12-03 | 浙江亚泰连接盘制造有限公司 | A kind of multi-sealed Anti-corrosion flange |
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| CN1621729A (en) * | 2004-12-16 | 2005-06-01 | 葛文宇 | Flexible jointing method of cement pipeline with major diameter |
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