CN201401600Y - Expansion joint - Google Patents

Abstract

The utility model belongs to the field of thermal equipment, in particular to an expansion joint. The utility model comprises a corrugated pipe, and the cross section of the corrugated pipe is rectangular. It can be seen from the above technical solution that since the cross section of the corrugated pipe is rectangular, the manufacturing difficulty of the expansion joint is reduced, thereby reducing the engineering cost. As can be seen from the foregoing, the utility model has a simple structure and is easy to manufacture.

Description

an expansion joint

technical field

The utility model belongs to the field of thermal equipment, in particular to an expansion joint.

Background technique

Existing expansion joints are generally in the shape of a circular tube, and for cooling devices with a rectangular cross-section or a large cross-sectional area, if the circular tube-shaped expansion joint is continued to be used, the manufacturing difficulty of the expansion joint will be greatly increased, and the overall project cost.

Contents of the invention

The purpose of the utility model is to provide a telescopic joint, which has a simple structure and is easy to manufacture.

In order to achieve the above object, the utility model adopts the following technical solutions: a telescopic joint, including a bellows, the cross section of the bellows is rectangular.

It can be seen from the above technical solution that since the cross section of the corrugated pipe is rectangular, the manufacturing difficulty of the expansion joint is reduced, thereby reducing the engineering cost. As can be seen from the foregoing, the utility model has a simple structure and is easy to manufacture.

Description of drawings

Fig. 1 is a structural schematic diagram of an expansion joint;

Fig. 2 is the top view of Fig. 1;

Figure 3 is a diagram of the use state of the expansion joint.

Detailed ways

As shown in Figures 1 and 2, a telescopic joint includes a bellows 10, and the cross section of the bellows 10 is rectangular.

When making the corrugated pipe 10, firstly, the metal plate that has been prepared is processed into a straight corrugated plate with straight stripes by using a conventional mechanical forming method. The side direction of the corrugated plate is parallel or vertical; then four straight corrugated plates are cut into a 45° bevel and welded to form a rectangular corrugated pipe. It can be seen that the utility model has a simple structure and is easy to manufacture.

In order to facilitate the connection between the expansion joint and other components, as shown in Figures 1 and 2, both ends of the bellows 10 are provided with rectangular flanges 20 .

The rectangular flange 20 is uniformly provided with installation holes 21 penetrating through its body.

During installation, align the installation holes 21 on the rectangular flange 20 with the installation holes of other components, and then use bolts to pass through the installation holes to fix the expansion joint and other components together.

The bellows 10 can be implemented in many ways. As a preferred solution of the present invention, the wall at one end of the bellows 10 is straight and plate-shaped, and the wall at the other end is corrugated or bent.

As shown in Figure 3, one end of the corrugated pipe 10 directly abuts against the support plate 40 on its lower side, and the pipe wall at the other end of the corrugated pipe 10 is corrugated or bent and abuts against the support plate 40 on the upper side, as shown in the figure A portion of bellows 10 is shown. When the cooling pipe 30 at the lower part of the bracket 10 is heated and elongated, the cooling pipe 30 drives the support plate 40 fixed thereon to extend upwards, and at the same time, the corrugated or bent pipe end of the bellows 10 is also heated and deformed, and the bellows 10 Under the action of the support plate 40 at its lower end, combined with its own deformation, the cooling pipe 30 and the support plate 40 above it are pushed upward to elongate.

Similarly, the corrugated pipe 10 can also be configured such that the pipe walls at both ends are in the shape of a straight plate, while the pipe wall between the two ends is corrugated or bent; or the pipe walls at both ends are in the shape Corrugated or bent, and the tube wall between the two ends is straight plate.

The arrangement described above is beneficial to make full use of the bent portion of the corrugated tube 10 , thereby reducing the processing cost of the corrugated tube and increasing the processing speed.

Claims (5)

1. A telescopic joint, comprising a bellows (10), characterized in that the cross section of the bellows (10) is rectangular. 2. The expansion joint according to claim 1, characterized in that: both ends of the bellows (10) are provided with rectangular flanges (20). 3. The telescopic joint according to claim 1, characterized in that: the wall at one end of the bellows (10) is straight and plate-shaped, and the wall at the other end is corrugated or bent. 4. The expansion joint according to claim 3, characterized in that: both ends of the bellows (10) are provided with rectangular flanges (20). 5. The expansion joint according to claim 2 or 4, characterized in that: said rectangular flange (20) is uniformly provided with installation holes (21) penetrating through its body.

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