CN222437359U - Reducing bellows expansion joint - Google Patents

Abstract

The utility model discloses a reducing corrugated pipe expansion joint which comprises a reducing pipe, a telescopic pipe and a first flange plate, wherein the telescopic pipe is arranged between the reducing pipe and the first flange plate, a connecting rod is also arranged between the reducing pipe and the first flange plate, the reducing pipe consists of a reducing pipe main body, a second flange plate and a third flange plate, and the two ends of the reducing pipe main body are respectively provided with the second flange plate and the third flange plate. According to the utility model, the diameter of the reducer pipe body positioned on the second flange plate is larger than that of the reducer pipe body positioned on the third flange plate, and the real diameter change of the bellows expansion joint is realized through changing the inner diameter of the pipe instead of singly changing the diameter of the flange.

Description

Reducing bellows expansion joint

Technical Field

The utility model relates to the technical field of bellows expansion joints, in particular to a reducing bellows expansion joint.

Background

The expansion joint of corrugated pipe is also called compensator or expansion joint, and is made up by using metal corrugated pipe, and is formed from corrugated pipe (an elastic element) which can be formed into its working main body and accessories of flange and guide tube, etc.. The corrugated pipe with the working main body can be stretched along the axial direction of the pipeline and also can be slightly bent by utilizing the effective stretching deformation of the corrugated pipe with the working main body, so that the assembly errors caused by axial, transverse and angular displacement can be compensated, and the axial length compensation can be carried out on the pipeline.

The prior publication No. CN220849820U discloses a variable diameter corrugated pipe expansion joint for an exhaust pipeline of a ship host, which adopts different flanges at two ends so as to realize diameter variation, but does not realize real diameter variation of a pipeline, so that the function of the expansion joint is realized, the real diameter variation function of the pipeline can be realized, and the technical problem to be solved is that the variable diameter corrugated pipe expansion joint is provided.

Disclosure of utility model

The utility model aims to provide a reducing corrugated pipe expansion joint so as to solve the problems in the prior art.

The reducing corrugated pipe expansion joint comprises a reducing pipe, a telescopic pipe and a first flange plate, wherein the telescopic pipe is arranged between the reducing pipe and the first flange plate, a connecting rod is further arranged between the reducing pipe and the first flange plate, the reducing pipe consists of a reducing pipe main body, a second flange plate and a third flange plate, and the two ends of the reducing pipe main body are respectively provided with the second flange plate and the third flange plate.

Preferably, the diameter of the reducer pipe main body positioned on the second flange plate is larger than that of the reducer pipe main body positioned on the third flange plate, and the reducer pipe main body, the second flange plate and the third flange plate are of an integrated structure.

Preferably, the telescopic pipe comprises a telescopic pipe body, and reinforcing ribs are welded at annular grooves on the outer side of the telescopic pipe body.

Preferably, the two ends of the telescopic pipe main body are provided with vertical structures, the second flange plate is provided with an annular slot matched with one of the vertical structures, and the other vertical structure is welded on the outer side of the first flange plate.

Preferably, the connecting rod is mounted on the first flange plate and the second flange plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. By adopting the reducing pipeline, the diameter of the reducing pipe main body positioned on the second flange plate is larger than that of the reducing pipe main body positioned on the third flange plate, and the real reducing of the expansion joint of the corrugated pipe is realized through changing the inner diameter of the pipeline instead of singly changing the diameter of the flange.

2. The annular grooves on the outer side of the telescopic pipe body are welded with reinforcing ribs, the telescopic joint of the telescopic pipe body can be protected through the reinforcing ribs, and the reciprocating service life of the telescopic pipe body is prolonged.

3. The two ends of the telescopic pipe main body are provided with vertical structures, the second flange plate is provided with an annular slot matched with one of the vertical structures, and the other vertical structure is welded on the outer side of the first flange plate, so that stable installation of the telescopic pipe main body can be realized.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a side view of the present utility model;

figure 3 is a cross-sectional view of A-A of figure 2 in accordance with the present utility model.

In the figure, 1, a reducing pipeline, 2, a connecting rod, 3, a telescopic pipeline, 4, a first flange plate, 11, a reducing pipe main body, 12, a second flange plate, 13, a third flange plate, 31, a telescopic pipe main body, 32 and a reinforcing rib.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

Referring to fig. 1-3, in an embodiment of the present utility model, a reducing bellows expansion joint includes a reducing pipe 1, a telescopic pipe 3 and a first flange plate 4, wherein the telescopic pipe 3 is installed between the reducing pipe 1 and the first flange plate 4, and a connecting rod 2 is also installed between the reducing pipe 1 and the first flange plate 4;

The reducer pipe 1 comprises a reducer pipe main body 11, a second flange plate 12 and a third flange plate 13, the second flange plate 12 and the third flange plate 13 are respectively arranged at two ends of the reducer pipe main body 11, the diameter of the reducer pipe main body 11 positioned at the second flange plate 12 is larger than that of the reducer pipe main body 11 positioned at the third flange plate 13, the reducer pipe main body 11, the second flange plate 12 and the third flange plate 13 are of an integrated structure, the diameter of the reducer pipe main body positioned at the second flange plate is larger than that of the reducer pipe main body positioned at the third flange plate, the real diameter change of a corrugated pipe expansion joint is realized through the change of the inner diameter of the pipe, instead of the single change of the diameter of the flange, and the connecting rod 2 is arranged on the first flange plate 4 and the second flange plate 12.

The telescopic pipe 3 comprises a telescopic pipe main body 31, reinforcing ribs 32 are welded at annular grooves on the outer side of the telescopic pipe main body 31, the telescopic joint of the telescopic pipe main body 31 can be protected through the reinforcing ribs 32, the service life of the telescopic pipe main body 31 in a reciprocating mode is prolonged, vertical structures are arranged at two ends of the telescopic pipe main body 31, annular slots matched with one of the vertical structures are formed in the second flange plate 12, and the other vertical structure is welded on the outer side of the first flange plate 4.

The expansion joint has the working principle that the distance between the first flange plate 4 and the second flange plate 12 can be adjusted through the connecting rod 2, so that the function of the expansion joint is realized, the diameter of the reducer pipe main body positioned on the second flange plate is larger than that of the reducer pipe main body positioned on the third flange plate, and the real diameter change of the expansion joint of the corrugated pipe is realized through the change of the inner diameter of the pipe.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The expansion joint of the variable-diameter corrugated pipe is characterized by comprising a variable-diameter pipeline (1), a telescopic pipeline (3) and a first flange plate (4), wherein the telescopic pipeline (3) is arranged between the variable-diameter pipeline (1) and the first flange plate (4), and a connecting rod (2) is also arranged between the variable-diameter pipeline (1) and the first flange plate (4);

The reducer pipe (1) is composed of a reducer pipe main body (11), a second flange plate (12) and a third flange plate (13), and the second flange plate (12) and the third flange plate (13) are respectively arranged at two ends of the reducer pipe main body (11).

2. A reducing bellows expansion joint according to claim 1, characterized in that the diameter of the reducing pipe main body (11) located on the second flange plate (12) is larger than that of the reducing pipe main body (11) located on the third flange plate (13), and the reducing pipe main body (11), the second flange plate (12) and the third flange plate (13) are in an integrated structure.

3. A variable diameter bellows expansion joint according to claim 1 or 2, characterized in that the telescopic pipe (3) comprises a telescopic pipe body (31), and reinforcing ribs (32) are welded at annular grooves on the outer side of the telescopic pipe body (31).

4. A reducing bellows expansion joint according to claim 3, characterized in that two ends of the telescopic tube main body (31) are provided with vertical structures, the second flange plate (12) is provided with an annular slot matched with one of the vertical structures, and the other vertical structure is welded on the outer side of the first flange plate (4).

5. A variable diameter bellows expansion joint according to claim 1 or 2, characterized in that the connecting rod (2) is mounted on a first flange plate (4) and a second flange plate (12).