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Structure and installation advantages of expansion joint

    Telescopic device It can compensate a certain amount of axial displacement and reduce a certain amount of axial pressure when it is used in the pipeline. It is an indispensable accessory for displacement compensation in modern industrial pipeline laying.

The expansion device is composed of pressure plate, sealing material, expansion pipe and body. When installing, the pressure plate compresses the sealing ring, and the sealing ring compresses and deforms under the action of pressure plate and expansion pipe, so as to achieve the sealing effect.

The widespread use of the expansion makes its product structure more and more advantageous. The product structure is constantly optimized because of the market demand. What are the functions of each part of the product?

There are two kinds of bolts on the expansion device, one is shorter, the other is longer, the shorter one is to make the pressure plate tightly fix the sealing material, and the long bolt plays the role of displacement compensation, so the distance of the long bolt should be adjusted after it is installed on the pipeline, so that the expansion device can have a certain range of expansion and contraction, so as to have effect.

There is also the body, put on the body, put on the bolt and tighten the screw. When the line is running, it will be heated and expanded, Expansion joint It will play a certain role in displacement compensation.

Generally speaking, there are two ways to connect the expansion joint and the pipeline: flange connection and welding.

Flange connection is relatively reliable, bearing capacity is also relatively strong. The diameter of the expansion flange should be consistent with the flange of the pipeline.

When welding is adopted, the weld must be completed at one time. The sub arc welding is used for backing. It is strictly forbidden to burn through the pipe and turn it back and forth. After the welding is completed, X-ray flaw detection shall be carried out on the welded junction to prevent the pipeline from being damaged by welding.

Shanghai Huanjing is a professional manufacturer of expansion joints, Force transfer joint On the basis of widely absorbing the advantages of similar products at home and abroad, bold adoption of new technology and new technology makes the products more suitable for the installation of different environments in different regions of China, which brings great convenience and benefits to the design, construction and maintenance of the project.

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