CN211398902U - Expansion loose joint - Google Patents
Expansion loose joint Download PDFInfo
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- CN211398902U CN211398902U CN201921824841.9U CN201921824841U CN211398902U CN 211398902 U CN211398902 U CN 211398902U CN 201921824841 U CN201921824841 U CN 201921824841U CN 211398902 U CN211398902 U CN 211398902U
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Abstract
An expansion loose joint is used for connecting pipelines in a train and absorbing the deformation of the pipelines caused by thermal expansion and cold contraction. The utility model discloses an interior screwed pipe connector for connecting tube to and set up be in flexible connecting piece between the interior screwed pipe connector. The telescopic connecting piece responds to the influence of thermal expansion and cold contraction of the pipeline on the pipeline structure, and the corresponding contraction is used for absorbing the expansion amount of the pipeline or corresponding stretching is used for ensuring the stability of pipeline connection. Therefore, the utility model discloses can absorb original pipeline deformation and act on the stress of union, guarantee that pipeline and union do not receive the flexible volume of deformation to influence, guarantee that it is out of shape or pine takes off at train operation process disappearance, guarantee that the influence train operation can not appear revealing in the train pipeline medium.
Description
Technical Field
The utility model relates to a train spare part field particularly relates to an inflation loose joint.
Background
The pipeline on the train expands when heated and contracts when cooled. Because the train has a large running distance span and the temperature difference of the running environment of the train is obvious in the running process, the deformation of the pipeline is large in the running process. For a stainless steel pipe with the length of 1m, the expansion and contraction amount of the stainless steel pipe is usually 0.35-0.38 mm in the running process of a train. Every steel pipe length sets up to 6m in the train, and the expend with heat and contract with cold flexible volume between the whole car steel pipe just can reach 5 ~ 8 millimeters.
Because the pipeline on the train does not have stress absorbing structure or can hold the space of deformation itself, the flexible volume of whole car 5 ~ 8 millimeters can only release on the loose joint that connects between the pipeline. The movable joint needs to bear the vibration of a train in the running process of the train and also needs to receive the stretching or the compression of the expansion with heat and the contraction with cold of a train pipeline, so that the movable joint is easy to deform or loosen, a medium in the pipeline is leaked, and the running of the train is influenced.
Therefore, a structure capable of absorbing the amount of deformation caused by thermal expansion and contraction of the train pipeline is needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide an inflation loose joint, the utility model discloses a flexible connecting piece realizes the release to train pipe deflection stress, and protection pipeline and loose joint itself do not receive the stress influence that the environment caused, protect the train pipe. The utility model discloses specifically adopt following technical scheme.
First, in order to achieve the above object, there is provided an expansion joint, comprising: the inner pipe joints are respectively arranged at the end parts of the two ends of the expansion loose joint; the telescopic connecting piece is arranged in the middle of the expansion loose joint and positioned between the inner pipe joints; one end of the telescopic connecting piece is connected to the inner tooth pipe joint, and the other end of the telescopic connecting piece is connected to the other inner tooth pipe joint.
Optionally, in the expansion loose joint, the telescopic connecting member is a metal corrugated pipe.
Optionally, in the expansion joint, a pipe wall of the metal corrugated pipe is a single layer or a double layer.
Optionally, in the expansion loose joint, an end of each of the inner adapters includes an inner adapter inner connection pipe, and the inner adapter inner connection pipe is connected to a pipe wall of the metal corrugated pipe in a sealing manner; the expansion loose joint is further connected with a connecting transition joint, the connecting transition joint is provided with an outer periphery and an inner periphery, and the inner periphery of the connecting transition joint is fixedly connected with the end part of the inner connecting pipe of the inner dental pipe connector.
Optionally, in the expansion loose joint, the inner pipe joint further includes an inner pipe joint external connector disposed outside an end of the expansion loose joint; the inner wall of the external connector of the inner thread pipe joint is provided with threads.
Optionally, the expansion joint further comprises a sheath, and ends of the sheath are fixedly connected to the outer periphery of each of the connection transition joints.
Optionally, in the expansion loose joint, the sheath is a metal braided sleeve, an end of the metal braided sleeve is welded to an outer periphery of the connection transition joint, and the outer peripheries of the metal braided sleeve and the connection transition joint surround the outside of the telescopic connector.
Optionally, in the above expansion loose joint, the metal knitted jacket and/or the telescopic connecting piece is made of a stainless steel material, and a surface of the metal knitted jacket has a pore.
Optionally, in the above expansion loose joint, the metal braided sleeve and the telescopic connecting piece are stretched or contracted synchronously to absorb the telescopic stress of the pipeline connected to the internal pipe joint.
Optionally, in the expansion loose joint, the outer side of the metal knitted jacket is further wrapped with a rubber protective sleeve.
Advantageous effects
The utility model discloses connect between the pipeline in the train, absorb the deflection of pipeline expend with heat and contract with cold. The utility model discloses an interior screwed pipe connector for connecting tube to and set up be in flexible connecting piece between the interior screwed pipe connector. The telescopic connecting piece responds to the influence of thermal expansion and cold contraction of the pipeline on the structural size of the pipeline, and the corresponding contraction is used for absorbing the expansion amount of the pipeline or corresponding stretching is used for ensuring the stable connection of the pipeline. Therefore, the utility model discloses can absorb original pipeline deformation and act on the stress of union, guarantee that pipeline and union do not receive the flexible volume of deformation to influence, guarantee that it is out of shape or pine takes off at train operation process disappearance, guarantee that the influence train operation can not appear revealing in the train pipeline medium.
For guaranteeing the requirement of bearing pressure in the pipeline, the utility model discloses can be further set up the expansion joint spare into double-deck nonrust corrugated steel pipe. Because the pipe wall of the stainless steel corrugated pipe is thin, the utility model can also provide protection for the stainless steel corrugated pipe through the sheath formed by the metal woven sleeve. The metal weaving sleeve is provided with holes, and the metal wires between the holes can absorb the telescopic stress synchronously along with the stretching or compressing of the corrugated pipe, so that the corrugated pipe inside the metal weaving sleeve is effectively protected, and the collision or impact of external foreign matters is avoided.
The pores of the metal woven sleeve can be used for rainwater and various gases in the environment to pass through, so that the phenomenon that the rainwater and various gases are accumulated on the wall of the corrugated pipe to corrode the pipe body is avoided. For further corrugated pipe pine takes off in this inflation loose joint and provides the sealing effect to intraductal medium when revealing temporarily, the utility model discloses still can wrap up rubber protective sleeve in the outside of metal braiding cover, act as the pipeline that supplies the medium circulation temporarily by rubber protective sleeve, avoid the train to respond to the pipeline trouble and by compelled bring to rest.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the invention for the purpose of explanation and not limitation of the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the expansion joint of the present invention;
FIG. 2 is a schematic view of a portion of the expansion joint of FIG. 1 in connection with a pipeline of a train;
fig. 3 is a perspective view of an embodiment of the expansion joint of the present invention.
In the drawings, 1 denotes an external pipe joint; 11 denotes a pipe; 2 denotes an internal thread joint; 21 denotes an inner nipple; 22 denotes an internal nipple external connection head; 3 denotes a telescopic link; 4 denotes a connecting transition joint; 41 represents the inner perimeter of the connecting transition piece; 42 represents the outer perimeter of the connecting transition joint; 5 denotes a sheath; 6 denotes a bolt; 61 denotes a screw thread; and 62 denotes a gasket.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solution of the embodiments of the present invention by combining the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present invention means that they exist individually or both at the same time.
The meaning of "inside and outside" in the utility model means that the direction pointing to the inside of the telescopic connecting piece is inside and the direction pointing to the outside of the sheath is outside relative to the expansion loose joint per se; and not to the specific limitations of the device mechanism of the present invention.
The term "connected" as used herein may mean either a direct connection between elements or an indirect connection between elements through other elements.
Fig. 1 is an expansion loose joint according to the utility model, which is arranged in a pipeline of a train, and an outer pipe joint 1 at the end part of the pipeline of the train is connected by two inner pipe joints 2 and is communicated with a pipeline 11 of the train. It connects telescopic connection 3 between two interior screwed pipe joints 2, responds the influence of pipeline expend with heat and contract with cold to pipeline structure size by telescopic connection 3, corresponding promotion shrink when the pipeline is heated the expansion of telescopic connection 3 with the inflation volume of absorption pipeline, or pipeline meet corresponding tensile when cold shrink telescopic connection 3 and guarantee that the pipe connection is stable.
In a more specific implementation mode, the telescopic connecting piece is arranged in the middle of the expansion loose joint and is positioned between the internal tooth pipe joints; one end of the telescopic connecting piece is connected to the inner tooth pipe joint, and the other end of the telescopic connecting piece is connected to the other inner tooth pipe joint. The expansion joint may comprise the expansion joint shown in fig. 3:
an inner pipe joint 2 which is arranged at the end part of the expansion loose joint and is connected with an outer pipe joint 1 arranged at the end part of a train pipeline in a mode shown in figure 2, wherein the inner pipe joint can be provided with threads for connecting the pipeline, and the threads are arranged inside the inner pipe joint pipeline; the inner dental pipe joints are connected with each other:
a connection transition joint 4, which is connected with the inner dental pipe joint 2 in a sealing way and has an inner periphery and an outer periphery; in one implementation, referring to the partial cross-sectional view of the expanded loose joint end in fig. 1, the inner circumference of the connecting transition joint 4 is closer to the internal thread joint 2, the outer circumference of the connecting transition joint 4 is longer than the inner circumference, and the inner circumference and the outer circumference are welded as a whole with the internal thread joint 2 at a position close to the end of the internal thread joint internal connection pipe 21 of the internal thread joint 2 in fig. 2; the other end of the internal thread pipe joint is an external connector 22 of the internal thread pipe joint; a gap is reserved between the inner ring and the outer ring of the connecting transition joint 4, and the side wall of the telescopic connecting piece 3 can be accommodated;
the end parts of the telescopic connecting pieces 3 are respectively connected with the inner peripheries of the connecting transition joints 4 in a sealing way, and pipelines for medium circulation are formed by the communication among the telescopic connecting pieces 3, the inner peripheries of the connecting transition joints 4, the inner dental tube joint inner connecting tubes 21 and the pipelines 11; the telescopic connecting piece 3 can be correspondingly contracted to absorb the expansion amount of the pipeline or correspondingly stretched to ensure the stable connection of the pipeline in the process that the pipeline 11 is heated to expand or is cooled to contract;
and the end part of the sheath 5 is fixedly connected with the periphery of each connecting transition joint 4 respectively and surrounds the telescopic connecting piece 3, so that the telescopic connecting piece 3 is protected from collision or impact of external foreign matters.
In some implementations, in the above expansion joint, the telescopic connection member 3 may be a corrugated pipe made of stainless steel or other metal materials. The pipeline pressure-bearing device can be arranged into a single layer or double layers or even multiple layers according to the pipeline pressure-bearing requirement so as to bear the pressure of 40kpa in the pipeline or correspond to the pipe pressure of at least 60 kilograms. The end part of the pipe wall of the stainless steel corrugated pipe can be welded on the inner periphery of the connecting transition joint 4 in a high-frequency oscillation welding mode and is communicated with the inner wall of the inner screwed pipe connector 2, so that the outer screwed pipe connector 1 connected with the inner screwed pipe connector is communicated to a pipeline 11 of a train.
Referring to fig. 2, a gasket 62 may further abut between the inner pipe joint and the outer pipe joint to seal a connection port of the inner pipe joint and the outer pipe joint, and the periphery of the gasket may be screwed and fixed by a thread 61 inside the bolt 6 and communicated to a pipeline.
In a more preferred implementation manner, in the expansion joint, the sheath 5 may be a metal braided sheath made of 304 stainless steel or the like, and an end of the metal braided sheath is welded to an outer periphery of the connecting transition joint 4. Specifically, the outer wall of the end of the metal braided sleeve is welded to the inner wall of the periphery of the connecting transition joint 4, and the connecting transition joint 4 integrally seals the ports of the sheath 5 and the telescopic connector 3, so that the ports are protected from being peeled off or disconnected by external force. Therefore, the metal braided sleeve and the periphery of the connecting transition joint 4 surround the outer side of the telescopic connecting piece 3, so that the telescopic connecting pieces 3 such as the corrugated pipe and the like are protected, the direct contact with external corrosive gas or liquid is avoided, and the influence of the perforation of the pipe wall on the sealing of the medium in the pipeline is avoided.
For guaranteeing the protection effect to pipeline and bellows structure, the metal is woven the cover and is woven by stainless steel's wire and form, and the mode of weaving makes the surface of metal is woven the cover has the hole, and the wire near the hole can relative movement, provides certain flexible deformation volume. Therefore, in the running process of the train, the metal woven sleeve can be synchronously stretched or contracted by the pipeline or the pipe joint along with the telescopic connecting piece 3, the telescopic stress of the pipeline connected with the inner screwed pipe joint 2 is absorbed, the stress is prevented from directly acting on the pipe joints such as the inner screwed pipe joint or the outer screwed pipe joint, and the gasket and the thread structure in the pipe joints are pulled or compressed, so that the pipe joints are deformed and loosened.
Under other implementation, for further corrugated pipe pine takes off in this inflation loose joint and provides the sealing effect to intraductal medium when revealing temporarily, the utility model discloses still can wrap up rubber protective sheath in the outside of metal braiding cover, act as the pipeline that supplies the medium circulation temporarily by rubber protective sheath, avoid the train to respond to the pipeline trouble and forced the bring to rest. The rubber protective sleeve can further prevent external hard objects from striking the expansion loose joint structure, buffer frequent vibration in vehicle operation and eliminate fatigue of internal mechanical structures.
Therefore, the utility model discloses can provide the flexible deformation volume of confession pipeline through the flexible connecting piece that the bellows formed, solve the problem that the flexible tractive of pipeline is warp the pine and is taken off easily by the flexible tractive of pipeline in the pipe joint expansion dimension. The utility model discloses an inflation loose joint, it can be according to the corresponding its bellows length that sets up of the required deformation volume of pipeline length between 15 ~ 20cm to provide sufficient expansion shrinkage allowance, guarantee that the loose joint in pipeline and the pipeline can not stretch out and draw back the deformation, effectively avoid the pipeline medium to reveal and influence the train operation.
The above description is only for the embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention.
Claims (10)
1. An expansion joint, comprising:
the inner pipe joints (2) are respectively arranged at the end parts of the two ends of the expansion loose joint; the telescopic connecting piece (3) is arranged in the middle of the expansion loose joint and is positioned between the inner pipe joints (2);
one end of the telescopic connecting piece (3) is connected to the inner pipe connector (2), and the other end of the telescopic connecting piece is connected to the other inner pipe connector (2).
2. Expansion joint according to claim 1, characterized in that the telescopic connection (3) is a metal bellows.
3. The expansion joint according to claim 2, wherein the wall of the metal bellows is single-layered or double-layered.
4. The expansion union according to claim 1, characterized in that the end of each of said female couplings (2) comprises a female coupling internal connection pipe (21), said female coupling internal connection pipe (21) being sealingly connected to the wall of the metal bellows;
the expansion loose joint is further connected with a connecting transition joint (4), the connecting transition joint (4) is provided with an outer periphery and an inner periphery, and the inner periphery of the connecting transition joint (4) is fixedly connected with the end part of the inner tooth pipe connector inner connecting pipe (21).
5. The expansion joint according to claim 4, characterized in that the female pipe joint (2) further comprises a female pipe joint external connection head (22) arranged outside the end of the expansion joint; the inner wall of the external connector (22) of the inner thread pipe joint is provided with threads.
6. Expansion joint according to claim 4, characterized in that it further comprises a sheath (5) whose ends are fixedly connected to the outer circumference of each connection transition piece (4), respectively.
7. Expansion joint according to claim 6, characterized in that the sheath (5) is a metal woven sleeve, the ends of which are welded to the outer circumference of the connection transition piece (4), the metal woven sleeve and the outer circumference of the connection transition piece (4) enclosing the outside of the telescopic connection (3).
8. Expansion joint according to claim 7, characterized in that the metal braid and/or the telescopic connector (3) is of stainless steel material, the surface of the metal braid being provided with pores.
9. Expansion joint according to claim 7, characterized in that said metal knitted jacket and said telescopic connector (3) are stretched or contracted simultaneously, absorbing the telescopic stress of the pipe to which the female pipe joint (2) is connected.
10. The expansion joint as claimed in claim 9, wherein the metal braided sleeve is further covered with a rubber protective sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921824841.9U CN211398902U (en) | 2019-10-28 | 2019-10-28 | Expansion loose joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921824841.9U CN211398902U (en) | 2019-10-28 | 2019-10-28 | Expansion loose joint |
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| Publication Number | Publication Date |
|---|---|
| CN211398902U true CN211398902U (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921824841.9U Active CN211398902U (en) | 2019-10-28 | 2019-10-28 | Expansion loose joint |
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| CN (1) | CN211398902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645429A (en) * | 2019-10-28 | 2020-01-03 | 安徽欣景隆轨道车辆装备有限公司 | an expansion joint |
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2019
- 2019-10-28 CN CN201921824841.9U patent/CN211398902U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645429A (en) * | 2019-10-28 | 2020-01-03 | 安徽欣景隆轨道车辆装备有限公司 | an expansion joint |
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