CN215258486U

CN215258486U - Expansion joint and pipeline connecting structure

Info

Publication number: CN215258486U
Application number: CN202121367760.8U
Authority: CN
Inventors: 于新勇
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-21
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses an expansion joint and pipeline connection structure belongs to expansion joint installation technical field, including expansion joint and pipeline, the outside of expansion joint tip is provided with the sphere arch along circumference, the inner wall of pipeline tip is provided with first conical surface, the diameter of first conical surface is by being close to a lateral of pipeline tip is kept away from one side of pipeline tip reduces gradually, and compact structure will the sphere arch compresses tightly on the first conical surface, the sphere arch with be line contact between the first conical surface, can realize arbitrary angle modulation at certain angle within range simultaneously playing sealed effect, eliminated the installation tolerance under the cold-packed, very big improvement its service reliability on the basis of not improving structure complexity.

Description

Expansion joint and pipeline connecting structure

Technical Field

The utility model belongs to the technical field of the expansion joint installation, concretely relates to expansion joint and pipeline connection structure.

Background

The expansion joint is also called as a compensator or an expansion joint, and the thin-wall pipeline is processed into annular ripples to play a role in flexibility adjustment, so that the functions of thermal compensation, vibration elimination and the like are played among the connected pipelines. The bellows can absorb the dimensional change of pipelines, ducts, containers and the like caused by expansion with heat and contraction with cold or compensate the axial, transverse and angular displacement of the pipelines, ducts, containers and the like by utilizing the effective telescopic deformation of the working main body bellows, can also be used for noise reduction and vibration reduction, and has wide application in modern industry. In the test process, the expansion joint has extremely weak capacity of compensating torsion, radial offset and inclination except axial displacement, and the offset of the installation angle offset in the high-temperature state under the normal temperature state can be amplified by multiple times, so that the elimination of the installation tolerance except the axial direction under the normal temperature state has important significance for improving the service reliability and the service life of the expansion joint.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides an expansion joint and pipeline connection structure, can eliminate all other accumulative tolerance except axial error under the expansion joint normal atmospheric temperature state in certain angle range, improve the service reliability of expansion joint.

In order to solve the technical problem, the technical scheme of the utility model is that:

the utility model provides an expansion joint and pipeline connection structure, includes expansion joint and pipeline, it is protruding that the outside of expansion joint tip is provided with the sphere along circumference, the inner wall of pipeline tip is provided with first conical surface, the diameter of first conical surface is by being close to one side of pipeline tip is kept away from one side of pipeline tip reduces gradually, and compact structure will the sphere is protruding to be compressed tightly on the first conical surface, the sphere protruding with be line contact between the first conical surface.

Further, the spherical center of the spherical protrusion is located on the central axis of the expansion joint.

Furthermore, the compression structure comprises a first flange and a second flange, the first flange is connected to the end of the pipeline, the first conical surface is arranged on the inner ring of the first flange, the second flange is sleeved on the outer side of the expansion joint, and the first flange and the second flange are fixed through a fastener.

Furthermore, the inner ring of the second flange is provided with a second tapered surface, the diameter of the second tapered surface is gradually reduced from one side close to the end part of the expansion joint to one side far away from the end part of the expansion joint, and the first tapered surface and the second tapered surface are respectively positioned on two sides of the spherical bulge in the axial direction.

Further, the fastener is a fixing bolt.

Furthermore, the first flange is provided with a through hole for the fixing bolt to pass through, and the second flange is correspondingly provided with a threaded hole matched with the fixing bolt.

Furthermore, the first flange and the second flange are provided with through holes for the fixing bolts to pass through, and the screw rods of the fixing bolts pass through the two through holes and then are locked on one side of the first flange through nuts.

Furthermore, the expansion joint includes the bellows, the both ends of bellows all are provided with the sphere is protruding, the pipeline at expansion joint both ends all is provided with first conical surface.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

because the utility model discloses an expansion joint and pipe connection structure includes expansion joint and pipeline, the outside of expansion joint tip is provided with the sphere arch along circumference, the inner wall of pipeline tip is provided with first conical surface, the diameter of first conical surface is dwindled to one side of keeping away from pipeline tip by one side that is close to pipeline tip gradually, compact structure compresses tightly the sphere arch on first conical surface, be line contact between sphere arch and the first conical surface, can realize arbitrary angle modulation at certain angle within range simultaneously playing sealed effect, the installation tolerance under the cold-assembling has been eliminated, very big improvement its service reliability on the basis of not improving structure complexity.

Drawings

FIG. 1 is a schematic view of the connection structure of the expansion joint and the pipeline of the present invention;

FIG. 2 is an enlarged schematic view of section A of FIG. 1;

in the figure, 1-expansion joint, 2-spherical bulge, 3-corrugated pipe, 4-pipeline, 5-first flange, 6-first conical surface, 7-second flange, 8-second conical surface and 9-fixing bolt.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.

As shown in figure 1, an expansion joint and pipeline connecting structure comprises an expansion joint 1 and a pipeline 4, wherein a spherical protrusion 2 is arranged on the outer side of the end portion of the expansion joint 1 along the circumferential direction, a first conical surface 6 is arranged on the inner wall of the end portion of the pipeline 4, the diameter of the first conical surface 6 is gradually reduced from one side close to the end portion of the pipeline 4 to one side far away from the end portion of the pipeline 4, the spherical protrusion 2 is pressed on the first conical surface 6 through a pressing structure, and the spherical protrusion 2 is in line contact with the first conical surface 6. Wherein, the centre of sphere of the spherical bulge 2 is positioned on the central axis of the expansion joint 1. The spherical bulge 2 and the first conical surface 6 can be tangent all the time, when the expansion joint 1 and the pipeline 4 are radially offset or inclined in a high-temperature state, the spherical bulge 2 and the first conical surface 6 are in line contact, the effect of complete sealing can be achieved for gas and liquid, and the reliability is high.

As shown in fig. 1, the compressing structure includes a first flange 5 and a second flange 7, the first flange 5 is connected to the end of the pipeline 4, the first tapered surface 6 is arranged at the inner ring of the first flange 5, the second flange 7 is sleeved on the outer side of the expansion joint 1, and the first flange 5 and the second flange 7 are fixed by a fastener. The inner ring of the second flange 7 is provided with a second conical surface 8, the diameter of the second conical surface 8 is gradually reduced from one side close to the end of the expansion joint 1 to one side far away from the end of the expansion joint 1, and the first conical surface 6 and the second conical surface 8 are respectively positioned on two sides of the spherical bulge 2 in the axial direction.

As shown in fig. 1, the fastening member is a fixing bolt 9, the fixing bolt 9 may be installed in a manner that the first flange 5 is provided with a through hole for the fixing bolt 9 to pass through, and the second flange 7 is correspondingly provided with a threaded hole adapted to the fixing bolt 9, that is, the fixing bolt 9 is in threaded connection with the second flange 7; or the first flange 5 and the second flange 7 can be provided with through holes for the fixing bolts 9 to pass through, and the screws of the fixing bolts 9 pass through the two through holes and then are locked at one side of the first flange 5 through nuts. In this embodiment, the first flange 5 is provided with a through hole, and the fixing bolt 9 is screwed to the second flange 7.

As shown in fig. 1, the expansion joint 1 comprises a corrugated pipe 3, spherical protrusions 2 are arranged at two ends of the corrugated pipe 3, and first conical surfaces 6 are arranged on pipelines 4 at two ends of the expansion joint 1. The problem of accumulated tolerance of external installation in the installation process of the expansion joint 1 is effectively solved, and the expansion joint has good compensation capacity for axial displacement, radial displacement and inclination.

The utility model discloses an expansion joint and pipeline connection structure set up the sphere arch through the tip at the expansion joint, and the inner wall of pipeline tip sets up first conical surface, and compact structure compresses tightly the sphere arch on first conical surface, is the line contact between sphere arch and the first conical surface, can realize arbitrary angle modulation at certain angle within range simultaneously playing sealed effect, has eliminated the installation tolerance under the cold assembly, very big improvement its reliability of use on the basis of not improving structure complexity.

Although specific embodiments of the present invention have been described above, it should be understood by those skilled in the art that the described embodiments are only some of the embodiments of the present invention, rather than all embodiments, which are given by way of illustration only, and the scope of the present invention is defined by the appended claims. Without any inventive step, those skilled in the art can make various changes or modifications to the embodiments without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides an expansion joint and pipeline connection structure, includes expansion joint and pipeline, its characterized in that, the outside of expansion joint tip is provided with the sphere along circumference protruding, the inner wall of pipeline tip is provided with first conical surface, the diameter of first conical surface is by being close to one side of pipeline tip is kept away from one side of pipeline tip reduces gradually, and compact structure will the sphere is protruding to be compressed tightly on the first conical surface, the sphere protruding with be line contact between the first conical surface.

2. An expansion joint and pipe connection according to claim 1, wherein the spherical center of the spherical projection is located on the central axis of the expansion joint.

3. The expansion joint and pipeline connecting structure according to claim 1, wherein the compression structure includes a first flange and a second flange, the first flange is connected to an end of the pipeline, the first tapered surface is arranged on an inner ring of the first flange, the second flange is sleeved on an outer side of the expansion joint, and the first flange and the second flange are fixed through a fastener.

4. The expansion joint and pipeline connecting structure according to claim 3, wherein the inner ring of the second flange is provided with a second tapered surface, the diameter of the second tapered surface is gradually reduced from a side close to the end of the expansion joint to a side far away from the end of the expansion joint, and the first tapered surface and the second tapered surface are respectively located on two sides of the spherical bulge in the axial direction.

5. An expansion joint and pipe connection according to claim 3, wherein said fastener is a fixing bolt.

6. The expansion joint and pipeline connecting structure according to claim 5, wherein the first flange is provided with a through hole for the fixing bolt to pass through, and the second flange is correspondingly provided with a threaded hole adapted to the fixing bolt.

7. The expansion joint and pipeline connecting structure according to claim 5, wherein the first flange and the second flange are provided with through holes for the fixing bolts to pass through, and screws of the fixing bolts are locked by nuts on one side of the first flange after passing through the two through holes.

8. An expansion joint and pipe connection structure according to any one of claims 1 to 7, wherein the expansion joint comprises a corrugated pipe, both ends of the corrugated pipe are provided with the spherical protrusions, and the pipes at both ends of the expansion joint are provided with the first tapered surfaces.