CN211550838U

CN211550838U - Expansion joint

Info

Publication number: CN211550838U
Application number: CN201922449654.3U
Authority: CN
Inventors: 张俊; 唐澈; 许克文; 方宁
Original assignee: Wuchang Shipbuilding Industry Group Co Ltd
Current assignee: Wuchang Shipbuilding Industry Group Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-22
Anticipated expiration: 2029-12-31

Abstract

The invention discloses an expansion joint, which belongs to the technical field of ship machinery, and comprises a flange pipe, a first pipeline, a second pipeline, a first flange and a second pipeline, wherein one end of the first flange, which is far away from the first pipeline, is connected with a system pipeline; the socket pipe comprises a second pipeline and a second flange, one end of the second pipeline is sleeved outside the first pipeline, and one end of the second flange, which is far away from the second pipeline, is connected with the system pipeline; a sealing structure provided at a contact surface position of the first pipe and the second pipe; limit structure, limit structure sets up first pipeline is kept away from the one end of first flange to solved among the prior art marine expansion joint and produced the technical problem of external leakage under the vibration condition, reached the leakage of having avoided the bolt not hard up to arouse, simple structure, the reliability is high, reduces the technological effect of manual work volume.

Description

Expansion joint

Technical Field

The invention relates to the technical field of ship machinery, in particular to an expansion joint.

Background

The installation and use conditions of ship pipelines are quite severe, a large part of joint leakage is caused by bolt looseness caused by vibration, and the methods for reducing and controlling leakage mainly comprise the steps of reducing the installation stress generated by the installation of different shafts and regularly checking locking bolts for fastening expansion joints, but have poor reliability, manpower consumption and unsatisfactory effect.

Disclosure of Invention

The invention provides an expansion joint, which is used for solving the technical problem that the marine expansion joint generates external leakage under the vibration condition in the prior art, and achieves the technical effects of avoiding leakage caused by bolt loosening, simple structure, high reliability and reduction of manual workload.

The invention provides an expansion joint, comprising: the flange pipe comprises a first pipeline and a first flange, and one end, far away from the first pipeline, of the first flange is connected with a system pipeline; the socket pipe comprises a second pipeline and a second flange, one end of the second pipeline is sleeved outside the first pipeline, and one end of the second flange, which is far away from the second pipeline, is connected with the system pipeline; a sealing structure provided at a contact surface position of the first pipe and the second pipe; and the limiting structure is arranged at one end, far away from the first flange, of the first pipeline.

Preferably, the outer diameter of the first pipe is smaller than the inner diameter of the second pipe.

Preferably, a plurality of grooves are sequentially formed in the second pipeline from one end far away from the second flange and along the inner side of the extending direction; wherein, the quantity of recess is five, and the interval sets up on the second pipeline.

Preferably, the sealing structure includes: a first seal disposed within the first groove; a second seal disposed within the second groove; the third sealing element and the fourth sealing element are arranged in the third groove; a fifth seal disposed within a fourth groove; a sixth seal disposed within the fifth groove.

Preferably, the first sealing element is a dust seal, and the second sealing element and the sixth sealing element are support rings.

Preferably, the fourth sealing element is an O-ring, the third sealing element is an O-ring retainer ring, and the O-ring retainer ring is mounted on the low-pressure side of the O-ring.

Preferably, the fifth seal is a lip seal with the lip facing the high pressure side.

Preferably, the first sealing element, the fourth sealing element and the fifth sealing element are all made of rubber; the second sealing element and the sixth sealing element are both made of polyformaldehyde.

Preferably, the limit structure includes: the elastic check ring is used for installing and fixing the clamping key, and a plurality of small holes are uniformly distributed in the clamping key so that pressure can pass through the small holes.

Preferably, the clamping key comprises a first assembling clamping key and a second assembling clamping key, and the first assembling clamping key and the second assembling clamping key are both in a semicircular shape and are assembled into an annular shape.

One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:

the telescopic joint provided by the embodiment of the invention comprises a flange pipe, a socket pipe, a sealing structure and a limiting structure, wherein the flange pipe comprises a first pipeline and a first flange, and one end of the first flange, which is far away from the first pipeline, is connected with a system pipeline; the socket pipe comprises a second pipeline and a second flange, one end of the second pipeline is sleeved outside the first pipeline, and one end, far away from the second pipeline, of the second flange is connected with the system pipeline; the sealing structure is arranged at the position of the contact surface of the first pipeline and the second pipeline, the limiting structure is arranged at one end of the first pipeline, which is far away from the first flange, and the telescopic compensation effect of the pipeline can be effectively realized through the relative movement of the flange pipe and the socket pipe; piping internal pressure passes through limit structure and gets into seal structure, makes the sealing effect more reliable to the technical problem of marine expansion joint produces the external leakage under the vibration condition among the prior art has been solved, has reached the leakage of having avoided the bolt not hard up to arouse, simple structure, and the reliability is high, reduces the technological effect of manual work volume.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

FIG. 1 is a schematic structural diagram of an expansion joint according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the latch of FIG. 1;

fig. 3 is a side view of fig. 2.

Description of reference numerals: the pipe fitting comprises a socket pipe 1, a first flange 101, a first pipeline 102, a sealing structure 2, a first sealing element 201, a second sealing element 202, a third sealing element 203, a fourth sealing element 204, a fifth sealing element 205, a sixth sealing element 206, a socket pipe 3, a second flange 301, a second pipeline 302, a limiting structure 4, a circlip 401 and a clamping key 402.

Detailed Description

The embodiment of the invention provides an expansion joint, which is used for solving the technical problem that the expansion joint for a ship generates external leakage under the vibration condition in the prior art.

The technical scheme in the embodiment of the invention has the following general idea:

according to the telescopic joint provided by the embodiment of the invention, the flange pipe comprises a first pipeline and a first flange, and one end, far away from the first pipeline, of the first flange is connected with a system pipeline; the socket pipe comprises a second pipeline and a second flange, one end of the second pipeline is sleeved outside the first pipeline, and one end of the second flange, which is far away from the second pipeline, is connected with the system pipeline; a sealing structure provided at a contact surface position of the first pipe and the second pipe; limit structure, limit structure sets up first pipeline is kept away from the one end of first flange has reached the leakage of having avoided the not hard up arouse of bolt, simple structure, and the reliability is high, reduces the technological effect of manual work volume.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 1 is a schematic structural diagram of an expansion joint according to an embodiment of the present invention, and as shown in fig. 1, the expansion joint includes: the pipe comprises a flange pipe 1, wherein the flange pipe 1 comprises a first pipeline 102 and a first flange 101, and one end, far away from the first pipeline 102, of the first flange 101 is connected with a system pipeline.

Specifically, the flange pipe 1 is a first connection portion of the expansion joint, and the flange pipe 1 has a flange and a short pipe, which are respectively a first flange 101 and a first pipeline 102, the first pipeline 102 is located at the end of the first flange 101, wherein one end of the first flange 101 is connected with a system pipeline, and the first pipeline 102 is in contact with the sealing structure 2 and is in contact with the limiting structure 4.

The expansion joint further comprises: the socket pipe 1, the socket pipe 3 includes a second pipeline 302 and a second flange 301, and a end of the second pipeline 302 is sleeved outside the first pipeline 102, and an end of the second flange 301 far away from the second pipeline 302 is connected with a system pipeline.

Further, the outer diameter of the first pipe 102 is smaller than the inner diameter of the second pipe 302.

Further, a plurality of grooves are sequentially formed in the second pipeline 302 from one end far away from the second flange 301 and along the inner side of the extending direction; wherein, the number of the grooves is five, and the grooves are arranged on the second pipeline 302 at intervals.

Specifically, the socket pipe 3 is a second connecting portion of the expansion joint, which is matched with the flange pipe 1 to realize expansion. Similarly, the socket pipe 3 has a flange and a short pipe, which are respectively a second flange 301 and a second pipe 302, the second flange 302 is located at the end of the second pipe 301, wherein the end of the second flange 301 far away from the second pipe 302 is connected to the system pipe.

Further, in practical use, the second pipe 302 is sleeved outside the first pipe 102, so that the inner diameter of the second pipe 302 is larger than the outer diameter of the first pipe 102. Meanwhile, the second pipeline 302 is respectively provided with a plurality of grooves, namely, mounting grooves for mounting the sealing structure 2, so that the sealing structure 2 can be mounted in the mounting grooves, and the number of the mounting grooves can be mounted and designed according to actual needs, which is not particularly limited in this embodiment. Further, in this embodiment, it is preferable that the number of the grooves formed in the second pipe 302 is five. Therefore, a first groove, a second groove, a third groove, a fourth groove and a fifth groove are sequentially formed on the inner side of the second pipe 302 from one end to the second flange 301, that is, along the extending direction of the second pipe 302, at the contact position with the first pipe 102. Meanwhile, a certain distance is formed between every two adjacent grooves, that is, five grooves are arranged on the second pipeline 302 at intervals, wherein the second grooves are arranged on the right side of the first grooves at intervals, the third grooves are arranged on the right side of the second grooves at intervals, the fourth grooves are arranged on the right side of the third grooves at intervals, and the fifth grooves are arranged on the right side of the fourth grooves at intervals.

The expansion joint further comprises: a sealing structure 2, said sealing structure 2 being arranged at the location of the interface of said first duct 102 and said second duct 302.

Specifically, the seal structure 2 is a structure for achieving sealing in the expansion joint. The sealing structure 2 is mounted inside a groove formed in the second pipe 302, that is, the sealing structure 2 is mounted on a contact surface of the first pipe 102 and the second pipe 302. In other words, the seal structure 2 is installed at the grooved end of the socket pipe 3 and is in direct contact with the flange pipe 1.

Further, the seal structure 2 includes: a first seal 201, said first seal 201 being disposed within a first groove; a second seal 202, said second seal 202 disposed within a second groove; a third seal 203 and a fourth seal 204, both the third seal 203 and the fourth seal 204 being disposed in the third groove; a fifth seal 205, said fifth seal 205 disposed within a fourth groove; a sixth seal 206, the sixth seal 206 disposed within the fifth groove.

Further, the first sealing member 201 is a dust seal, and the second sealing member 202 and the sixth sealing member 206 are both support rings.

Further, the fourth sealing member 204 is an O-ring, the third sealing member 203 is an O-ring retainer, and the O-ring retainer is mounted on the low-pressure side of the O-ring.

Further, the fifth seal 205 is a lip seal, and the lip faces the high pressure side.

Furthermore, the first sealing element 201, the fourth sealing element 204 and the fifth sealing element 205 are all made of rubber; the second sealing element 202 and the sixth sealing element 206 are made of polyoxymethylene.

Specifically, the sealing structure 2 includes a plurality of sealing members, and the sealing function of the expansion joint is more reliable through the cooperation of the plurality of sealing members. In this embodiment, the number of the sealing members in the sealing structure 2 is preferably six, and the number of the sealing members may be installed and designed according to actual needs, which is not particularly limited in this embodiment. This seal structure 2 includes: a first seal 201, a second seal 202, a third seal 203, a fourth seal 204, a fifth seal 205 and a sixth seal 206, which are arranged in the following order: the six sealing elements are arranged corresponding to the grooves formed on the second pipeline 302, wherein the first sealing element 201 is arranged in the first groove, the second sealing element 202 is arranged in the second groove, the third sealing element 203 and the fourth sealing element 204 are arranged in the third groove, the fifth sealing element 205 is arranged in the fourth groove, and the sixth sealing element 206 is arranged in the fifth groove. In the present embodiment, it is preferable that the first seal 201 is a dust seal, the second seal 202 and the sixth seal 206 are support rings, the third seal 203 is an O-ring retainer, the fourth seal 204 is an O-ring, and the fifth seal 205 is a lip seal. The first sealing element 201, the fourth sealing element 204, and the fifth sealing element 205 are made of rubber, that is, the dustproof seal, the O-ring, and the lip seal are made of rubber, the second sealing element 202, and the sixth sealing element 206 are made of polyoxymethylene, that is, the support ring is made of polyoxymethylene, which is specifically determined by the system properties. Furthermore, the lip of the lip seal is toward the high-pressure side, and the O-shaped ring retainer ring is arranged on the low-pressure side of the O-shaped ring;

the expansion joint further comprises: the limiting structure 4 is arranged at one end, far away from the first flange 101, of the first pipeline 102.

Further, limit structure 4 includes: the elastic retainer ring 401 is used for installing and fixing the clamp key 402, and a plurality of small holes are uniformly distributed in the clamp key 402 so that pressure can pass through the small holes.

Further, the clamp key 402 includes a first assembling clamp key and a second assembling clamp key, and the first assembling clamp key and the second assembling clamp key are both semi-circular and are assembled into a ring shape.

Specifically, the limiting structure 4 is installed on the second flange 301 on the socket pipe 3 in a slotted manner, that is, the limiting structure 4 is installed inside the socket pipe 3 and is located at the end of the first pipeline 102, so that the telescopic stroke of the flange pipe 1 can be limited. The limiting structure 4 comprises a circlip 401 and a catch 402, wherein the circlip 401 is used for fixing the catch 402. As shown in fig. 2 and 3, the latch 402 is a semicircular latch with holes, i.e., a plurality of small holes are formed on the latch 2, so as to achieve the purpose of facilitating the passage of pressure. Further, the snap 402 includes first assembly snap and second assembly snap, and the shape of first assembly snap and second assembly snap is semi-circular, and then can assemble into an annular structure, can reach the purpose of limiting the flexible stroke of flange pipe 1 through foraminiferous snap 402.

Furthermore, the telescopic joint in the embodiment can effectively play a role in pipeline telescopic compensation through the relative movement of the flange pipe 1 and the socket pipe 3; piping internal pressure passes through limit structure 4 and gets into seal structure 2, acts on the lip seal, makes the lip seal lip closely laminate flange pipe 1, plays the self sealss effect, and then plays the secondary seal effect by O type circle, makes sealed effect more reliable. Certain installation stress that the installation pipeline axis disalignment brought can be overcome to two support rings, guarantees going on smoothly of the relative concertina movement of flange pipe 1 and socket joint pipe 3, and simultaneously, the expansion joint in this embodiment does not adopt the bolt-up, and then has reached the sealed technological effect that loses efficacy that the bolt that avoids the vibration to bring is not hard up to lead to.

Therefore, the embodiment carries out secondary sealing to the expansion joint through the sealing structure so as to improve the sealing effect, improves the installation stress of the joint, solves the technical problem of external leakage caused by looseness of the bolt of the marine expansion joint, and is applicable to various marine pipeline systems.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. An expansion joint, comprising:

the flange pipe comprises a first pipeline and a first flange, and one end, far away from the first pipeline, of the first flange is connected with a system pipeline;

the socket pipe comprises a second pipeline and a second flange, one end of the second pipeline is sleeved outside the first pipeline, and one end of the second flange, which is far away from the second pipeline, is connected with the system pipeline;

a sealing structure provided at a contact surface position of the first pipe and the second pipe;

and the limiting structure is arranged at one end, far away from the first flange, of the first pipeline.

2. The expansion joint of claim 1, wherein said first conduit has an outer diameter less than an inner diameter of said second conduit.

3. The expansion joint of claim 1, wherein a plurality of grooves are sequentially formed in the second pipeline from one end far away from the second flange to the inner side in the extending direction;

wherein, the quantity of recess is five, and the interval sets up on the second pipeline.

4. The expansion joint of claim 3, wherein said sealing structure comprises:

a first seal disposed within the first groove;

a second seal disposed within the second groove;

the third sealing element and the fourth sealing element are arranged in the third groove;

a fifth seal disposed within a fourth groove;

a sixth seal disposed within the fifth groove.

5. The expansion joint of claim 4, wherein said first seal is a dust seal and said second and sixth seals are support rings.

6. The expansion joint of claim 4, wherein said fourth seal is an O-ring, said third seal is an O-ring retainer, and said O-ring retainer is mounted to a low pressure side of said O-ring.

7. The expansion joint according to claim 4, wherein said fifth seal is a lip seal with the lip facing the high pressure side.

8. The expansion joint of claim 4, wherein said first, fourth, and fifth seals are all rubber;

the second sealing element and the sixth sealing element are both made of polyformaldehyde.

9. The expansion joint of claim 1, wherein said limit structure comprises:

the elastic check ring is used for installing and fixing the clamping key, and a plurality of small holes are uniformly distributed in the clamping key so that pressure can pass through the small holes.

10. The expansion joint of claim 9, wherein said snap keys comprise a first assembly snap key and a second assembly snap key, and said first assembly snap key and said second assembly snap key are semi-circular and are assembled in a ring shape.