CN114294488A - Axial length adjustable sealing joint - Google Patents
Axial length adjustable sealing joint Download PDFInfo
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- CN114294488A CN114294488A CN202111637890.3A CN202111637890A CN114294488A CN 114294488 A CN114294488 A CN 114294488A CN 202111637890 A CN202111637890 A CN 202111637890A CN 114294488 A CN114294488 A CN 114294488A
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Abstract
The invention belongs to the technical field of pipe joints, and discloses a sealing joint with adjustable axial length, which comprises a first joint, a second joint and a limiting piece, wherein the first joint is fixedly connected with the second joint; a butting part is arranged in the first joint, and a limiting part is arranged at one end of the first joint, which is far away from the butting part; a flange part is arranged outside the second joint; the flange part of the second joint is inserted into the first joint and is limited by the axial movement of the abutting part, and the flange part is limited between the abutting part and the limiting part and can move axially between the abutting part and the limiting part; the flange part is provided with an annular groove, a sealing element is arranged in the annular groove, and the sealing element fills a gap between the first joint and the second joint; the inner peripheral wall of the first joint is annularly provided with a groove part, and the groove part is opposite to the outer peripheral wall of the second joint and mutually matched to form labyrinth seal. The joint has the advantages of adjustable length, good sealing performance, capability of compensating pipeline interval change caused by expansion with heat and contraction with cold and the like, convenient and flexible use, simple structure and low production cost.
Description
Technical Field
The invention belongs to the technical field of pipe joints, and particularly relates to a sealing joint with adjustable axial length.
Background
A pipe joint, which is a component for connecting pipelines; in a high-pressure pipeline system, a common pipe joint is a metal pipe joint, and the metal material is usually stainless steel, aluminum alloy, carbon steel and the like.
At present, in the technical field of metal pipe joints, common metal pipe joints include a metal hard pipe joint and a metal flexible pipe joint, the metal hard pipe joint is a rigid pipe joint, the length of the metal hard pipe joint is generally fixed, and when the metal hard pipe joint is installed in a pipeline, if the distance between the pipelines is too large, the situation that the metal hard pipe joint cannot be installed in the pipeline may occur.
The metal hose joint is a flexible pipe joint, the inner layer of the metal hose joint is generally made of a corrugated pipe with a spiral shape or an annular shape, the surface contacting with a conveyed medium is rough, the surface contacting with the conveyed medium in the metal hard pipe joint is smooth, and the medium circulation capacity of a pipeline connected with the metal hose joint is obviously lower than that of a pipeline connected with the metal hard pipe joint under the same pipeline inner diameter, so that the application effect of the metal hard pipe joint is better, but the problem of adaptability of the metal hard pipe joint to the space between the pipelines needs to be solved, and a plurality of published patents exist at present.
For example, the utility model discloses a chinese utility model patent with publication number CN211779500U, it discloses a high adaptability pipe connection head structure, including the pipe of pegging graft, adjust the ring, the regulating part, the sealing member, pipeline ring and connecting piece, adjust the ring and peg graft the cooperation with the pipe of pegging graft, the pipe of pegging graft passes the regulation ring, two regulation ring symmetries set up the both sides at the pipe of pegging graft, the regulating part is connected between two regulation rings, the regulating part is length-adjustable structure, can make two regulation rings be close to each other or keep away from each other for the pipe of pegging graft through the regulating part, the sealing member is connected in the grafting cooperation department of adjusting ring and pegging graft pipe, the sealing member plays sealed effect to the grafting complex clearance between regulation ring and the pipe of pegging graft. It can be seen that the pipe joint of this patent can accommodate the distance error between the pipes to be joined. But the structure is complicated, and manufacturing cost is higher, is unfavorable for comprehensive popularization.
In addition, after the joint is installed in a pipeline system, the distance between the pipes can be changed due to the phenomenon that the pipeline expands with heat and contracts with cold; the existing joint with the length-adjustable structure is limited by the structure of the joint after being installed in a pipeline system, the length adjustment is difficult to be carried out again, and when the distance between pipes changes due to the expansion with heat and the contraction with cold in the pipeline system, the distance between pipes is difficult to be compensated, so that the situations of joint damage or fluid leakage and the like occur.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the sealing joint with the adjustable axial length, which can adapt to the space between the installation position and the pipeline, can compensate the change of the pipeline space caused by the phenomena of expansion with heat, contraction with cold and the like, is convenient for connecting and installing the pipeline, is favorable for ensuring the sealing effect and is favorable for reducing the stress in a pipeline system.
The invention is realized by the following technical scheme:
a sealing joint with adjustable axial length comprises a first joint, a second joint and a limiting piece;
a butting part is arranged in the first joint, and a limiting part is arranged at one end of the first joint, which is far away from the butting part;
a flange part is arranged outside the second joint;
the flange part of the second joint is inserted into the first joint and is limited by the axial movement of the abutting part, and the flange part is limited between the abutting part and the limiting part and can move axially between the abutting part and the limiting part;
the flange part is provided with an annular groove, a sealing element is arranged in the annular groove, and the sealing element fills a gap between the first joint and the second joint;
the inner peripheral wall of the first joint is annularly provided with a groove part, and the groove part is opposite to the outer peripheral wall of the second joint and mutually matched to form labyrinth seal.
Therefore, the flange portion enables the second joint to be limited between the abutting portion and the limiting portion, the second joint can move in the axial direction relative to the first joint, the axial length of the joint is adjustable, and the flange portion can be used for compensating the distance between the joint with the fixed length and the pipeline. And the adjustment of the length of the joint can be realized by directly drawing the second joint, so that the use is convenient and flexible, and in addition, the joint structure is simple, the production cost is low, and the better popularization is easily realized.
The arrangement of the labyrinth seal improves the sealing reliability and does not excessively lose the mobility of the first joint and the second joint; the sealing element is arranged at the downstream position of the labyrinth seal in terms of the flowing direction of the fluid medium in the joint gap, and the sealing element can seal and block the fluid medium leaked from the labyrinth seal; the sealing reliability of the joint is enhanced by the two components, and the sealing requirement required by conveying high-pressure media is better met.
Preferably, the groove portion includes a plurality of annular grooves arranged in parallel, which cooperate with the second joint outer peripheral wall to form a labyrinth seal.
Preferably, the sealing element is a sealing ring.
Preferably, the limiting part is a limiting nut, and the limiting nut is in threaded connection with the first connector.
Preferably, the spacing nut is made of a pressure-resistant metal material.
Preferably, the first joint is fixedly provided with a locking piece, the locking piece penetrates through the pipe wall of the first joint, and the bottom of the locking piece can be abutted against the flange part or partially inserted into the flange part, so that the first joint and the second joint are relatively fixed, and the reliability of the metal pipeline system is enhanced.
Preferably, the locking member is a locking screw threadedly coupled to the first fitting pipe wall.
Preferably, the first joint and the second joint are both made of a pressure-resistant metal material.
The invention has the beneficial effects that:
the flange portion enables the second joint to be limited between the abutting portion and the limiting portion, the second joint can move in the axial direction relative to the first joint, the axial length of the joint is adjustable, and the flange portion can be used for compensating the distance between the joint with the fixed length and the pipeline.
The adjustment of the length of the joint can be realized by directly drawing the second joint, the use is convenient and flexible, the joint structure is simple, the production cost is low, and the better popularization is easy to realize.
The inner peripheral wall of the first joint is annularly provided with a groove part, the groove part is opposite to the outer peripheral wall of the second joint, and the groove part and the outer peripheral wall of the second joint are mutually matched to form labyrinth seal, so that the sealing reliability is improved, and the mobility of the first joint and the second joint is not excessively lost.
The sealing element is arranged at the downstream position of the labyrinth seal in terms of the flowing direction of the fluid medium in the joint gap, and the sealing element can seal and block the fluid medium leaked from the labyrinth seal; the combined sealing form of the labyrinth seal and the sealing piece enhances the sealing reliability of the joint and better meets the sealing requirement required by conveying high-pressure media.
Through the relative motion between first joint and the second joint, can compensate the pipeline interval change that phenomenons such as expend with heat and contract with cold caused, avoid appearing the condition such as joint damage or fluid leakage.
The relative fixation between the first joint and the second joint is realized through the locking screw, and the reliability of the metal pipeline system is enhanced.
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 a schematic view of the internal structure of an axial length adjustable sealing joint according to an embodiment;
FIG. 2 is an isometric view of an axial length adjustable seal joint according to one embodiment;
FIG. 3 is a schematic view of the internal flow path of one embodiment of the sealing joint with adjustable axial length;
FIG. 4 is a schematic view of the internal structure of a sealing joint with adjustable axial length according to the second embodiment;
in the figure: 1. the connector comprises a first connector, a second connector, a 3, a limiting piece, a 4, a sealing piece, 11, an abutting portion, 12, a groove portion, 22, a flange portion, 23, an annular groove, 5, a locking piece, 6 and a fluid medium.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The first embodiment is as follows:
referring to fig. 1 to 3, the present embodiment provides a sealing joint with adjustable axial length, which includes a first joint 1, a second joint 2, and a limiting member 3;
an abutting part 11 is arranged in the first joint 1, and a limiting part 3 is arranged at one end of the first joint 1, which is far away from the abutting part 11;
a flange part 22 is arranged outside the second joint 2;
the flange portion 22 of the second joint 2 is inserted into the first joint 1 and is limited by the axial movement of the abutting portion 11, and the flange portion 22 is limited between the abutting portion 11 and the limiting member 3 and can move axially between the abutting portion 11 and the limiting member 3, that is, the axial linear distance between the limiting member 3 and the abutting portion 11 of the first joint 1 is greater than the axial length distance of the flange portion 22 itself.
The flange part 22 is provided with an annular groove, a sealing element 4 is arranged in the annular groove, and the sealing element 4 fills a gap between the first joint 1 and the second joint 2;
the inner peripheral wall of the first joint 1 is provided with a groove part 12 in a surrounding manner, and the groove part 12 is opposite to the outer peripheral wall of the second joint 2 and is matched with the outer peripheral wall of the second joint to form labyrinth seal.
In the embodiment, the flange portion 22 is used for limiting the second joint 2 between the abutting portion 11 and the limiting member 3, and the second joint 2 can move in the axial direction relative to the first joint 1, so that the axial length of the joint can be adjusted, and the joint can be used for compensating the distance between the joint with the fixed length and the pipeline. And the adjustment of the length of the joint can be realized by directly drawing the second joint 2, so that the use is convenient and flexible, the joint structure is simple, the production cost is low, and the better popularization can be easily realized.
In this embodiment, the limiting member 3 is a limiting nut, and the limiting nut is in threaded connection with the first connector 1.
In the present embodiment, an annular groove 23 is provided in the flange portion 22, the annular groove 23 is provided in a middle region of the flange portion 22, a sealing member 4 is provided in the annular groove 23, the sealing member 4 is compressed by the first joint 1 and the second joint 2 to fill a gap between the first joint 1 and the second joint 2, and the sealing member 4 is a sealing ring in the present embodiment. When the fluid medium 6 is conveyed in the first joint 1 and the second joint 2, the fluid medium 6 is blocked by the sealing member 4, so that the fluid medium 6 conveyed in the first joint 1 and the second joint 2 is difficult to leak out of the joints.
When the fluid medium 6 conveyed in the first joint 1 and the second joint 2 is a high-pressure medium, the single-form sealing member 4 is difficult to completely seal and block the fluid medium 6 in the joints, and a small amount of the fluid medium 6 may completely pass through the sealing member 4, and leakage to the outside of the joints may occur. In order to avoid the condition that the fluid medium 6 leaks to the outer side of the joint, the inner peripheral wall of the first joint 1 is annularly provided with a groove part 12, and the groove part 12 is opposite to the outer peripheral wall of the second joint 2 and mutually matched to form a labyrinth seal. In this embodiment, the groove portion 12 includes a plurality of annular grooves arranged in parallel, the plurality of annular grooves arranged in parallel and the outer peripheral wall of the second joint 2 cooperate with each other to form a labyrinth seal, the fluid medium 6 introduced into the labyrinth seal is difficult to pass through the labyrinth seal due to the plurality of annular grooves arranged in parallel, even if a small amount of the fluid medium 6 may completely pass through the labyrinth seal, since the labyrinth seal is relatively disposed at the upstream position of the position where the seal 4 is located, the seal 4 seals and blocks the fluid medium leaked from the labyrinth seal, and the fluid medium 6 is prevented from leaking from the joint to the outside. The labyrinth seal arrangement reduces the fluid flow rate flowing to the position of the sealing element 4, reduces the fluid pressure exerted on the sealing element 4 by the fluid medium 6, improves the sealing reliability, and does not lose the mobility of the first joint and the second joint too much, so that the sealing joint with the adjustable axial length is suitable for the fluid medium transportation of a high-pressure fluid system.
In this embodiment, the limiting nut, the first joint 1 and the second joint 2 are all made of a high pressure-resistant metal material, such as stainless steel.
The following describes in detail the installation process of the sealing joint with adjustable axial length according to this embodiment:
the second connector 2 is inserted into the first connector 1, the limiting nut is in threaded connection with the first connector 1, the distance between the flange portion 22 and the abutting portion 11 is further adjusted, so that the metal pipeline on one side is inserted into the first connector 1, the metal pipeline on the other side is inserted into the second connector 2, and after the connectors are installed on the metal pipelines, the metal pipelines on the two sides can be reliably fixed into the first connector 1 and the second connector 2 respectively in a welding mode, and therefore the integral installation is completed.
This embodiment axial length adjustable sealing joint installs back in the metal pipeline, because flange portion 22 of second joint 2 still can axial displacement between butt portion 11 and locating part 3 of first joint 1, consequently, appear expend with heat and contract with cold the phenomenon and cause the interval distance between the pipe to change when appearing in the metal pipeline, through the relative motion between first joint 1 and second joint 2, automatic interval distance to the pipe changes and compensates, avoids appearing the condition such as joint damage or fluid leakage.
Example two:
after the joint is installed in a metal pipeline, if the first joint 1 and the second joint 2 are not fixed relatively, the fluid medium 6 can exert thrust on the joint on one side, the joint and the other joint generate relative axial movement under the action of the thrust, so that the whole joint is lengthened, and the metal pipeline on one side is bent and deformed due to the change of the length of the joint, thereby causing adverse effects on the reliability of a metal pipeline system.
Therefore, the difference between the second embodiment and the first embodiment is that the locking member 5 is fixedly disposed on the first joint 1, the locking member 5 penetrates through the pipe wall of the first joint 1, the bottom of the locking member 5 can abut against the flange portion 22 or can be partially inserted into the flange portion 22, and in this embodiment, the locking member 5 is a locking screw threadedly connected with the pipe wall of the first joint 1. The relative fixation between the first joint 1 and the second joint 2 is realized through the locking screw, and the relative axial movement between the first joint 1 and the second joint 2 is prevented through the locking screw 5, so that the joints installed in the metal pipeline cannot be integrally elongated, and the reliability of the metal pipeline system is enhanced.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention by those skilled in the art should fall within the protection scope of the present invention without departing from the design spirit of the present invention.
Claims (8)
1. The sealing joint with adjustable axial length is characterized by comprising a first joint and a second joint
A joint and a limiting piece;
a butting part is arranged in the first joint, and a limiting part is arranged at one end of the first joint, which is far away from the butting part;
a flange part is arranged outside the second joint;
the flange part of the second joint is inserted into the first joint and is limited by the axial movement of the abutting part, and the flange part is limited between the abutting part and the limiting part and can move axially between the abutting part and the limiting part;
the flange part is provided with an annular groove, a sealing element is arranged in the annular groove, and the sealing element fills a gap between the first joint and the second joint;
the inner peripheral wall of the first joint is annularly provided with a groove part, and the groove part is opposite to the outer peripheral wall of the second joint and mutually matched to form labyrinth seal.
2. The sealed joint of claim 1, wherein the groove portion includes a plurality of annular grooves arranged in parallel, the plurality of annular grooves arranged in parallel cooperating with the second joint peripheral wall to form a labyrinth seal.
3. The sealed joint of claim 1, wherein the seal is axially adjustable in length
The sealing piece adopts a sealing ring.
4. The sealing joint of claim 1, wherein the restriction is a limit stop
The position piece adopts a limiting nut, and the limiting nut is in threaded connection with the first connector.
5. The sealing joint of claim 4, wherein the restriction is a limit stop
The bit nut is made of a pressure-resistant metal material.
6. The sealed joint of claim 1, wherein the first seal is adjustable in axial length
The locking piece is fixed on the joint and penetrates through the wall of the first joint pipe, and the bottom of the locking piece can be abutted against the flange part or partially inserted into the flange part.
7. The sealing joint of claim 6, wherein the lock is a lock
The fixed piece adopts a locking screw which is in threaded connection with the pipe wall of the first connector.
8. The sealing joint of claim 1,
the first joint and the second joint are both made of pressure-resistant metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637890.3A CN114294488A (en) | 2021-12-30 | 2021-12-30 | Axial length adjustable sealing joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637890.3A CN114294488A (en) | 2021-12-30 | 2021-12-30 | Axial length adjustable sealing joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114294488A true CN114294488A (en) | 2022-04-08 |
Family
ID=80970639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111637890.3A Pending CN114294488A (en) | 2021-12-30 | 2021-12-30 | Axial length adjustable sealing joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114294488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962826A (en) * | 2022-06-16 | 2022-08-30 | 中海石油(中国)有限公司 | Underwater hydraulic loading telescopic connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008128279A (en) * | 2006-11-17 | 2008-06-05 | Hitachi Engineering & Services Co Ltd | Expansion union joint structure and fluid transfer pipe system using the same |
| JP4185161B1 (en) * | 2008-03-31 | 2008-11-26 | 株式会社日立エンジニアリング・アンド・サービス | Expansion union joint and fluid transfer piping system |
| CN103123025A (en) * | 2011-11-21 | 2013-05-29 | 中国航空工业集团公司沈阳发动机设计研究所 | High-temperature pipeline sealing structure capable of axial expansion |
| CN203880267U (en) * | 2014-03-28 | 2014-10-15 | 中航商用航空发动机有限责任公司 | Secondary sealing self-locking pipe joint assembly |
| CN109764197A (en) * | 2019-02-19 | 2019-05-17 | 北京星际荣耀空间科技有限公司 | A kind of pipeline jointing construction and pipe-line system |
| CN212745470U (en) * | 2020-03-24 | 2021-03-19 | 浙江亚太机电股份有限公司 | Novel oil inlet joint sealing structure for automobile |
| CN214662856U (en) * | 2021-04-21 | 2021-11-09 | 三一重机有限公司 | Flexible joint |
| CN113803541A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Telescopic welding straight-through pipe joint and hydraulic cylinder with same |
-
2021
- 2021-12-30 CN CN202111637890.3A patent/CN114294488A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008128279A (en) * | 2006-11-17 | 2008-06-05 | Hitachi Engineering & Services Co Ltd | Expansion union joint structure and fluid transfer pipe system using the same |
| JP4185161B1 (en) * | 2008-03-31 | 2008-11-26 | 株式会社日立エンジニアリング・アンド・サービス | Expansion union joint and fluid transfer piping system |
| CN103123025A (en) * | 2011-11-21 | 2013-05-29 | 中国航空工业集团公司沈阳发动机设计研究所 | High-temperature pipeline sealing structure capable of axial expansion |
| CN203880267U (en) * | 2014-03-28 | 2014-10-15 | 中航商用航空发动机有限责任公司 | Secondary sealing self-locking pipe joint assembly |
| CN109764197A (en) * | 2019-02-19 | 2019-05-17 | 北京星际荣耀空间科技有限公司 | A kind of pipeline jointing construction and pipe-line system |
| CN212745470U (en) * | 2020-03-24 | 2021-03-19 | 浙江亚太机电股份有限公司 | Novel oil inlet joint sealing structure for automobile |
| CN214662856U (en) * | 2021-04-21 | 2021-11-09 | 三一重机有限公司 | Flexible joint |
| CN113803541A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Telescopic welding straight-through pipe joint and hydraulic cylinder with same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962826A (en) * | 2022-06-16 | 2022-08-30 | 中海石油(中国)有限公司 | Underwater hydraulic loading telescopic connector |
| CN114962826B (en) * | 2022-06-16 | 2024-03-08 | 中海石油(中国)有限公司 | Underwater hydraulic loading telescopic connector |
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