Knowledge sharing of non-metallic expansion joints

Non-metallic expansion joints, also known as non-metallic flexible expansion joints, compared with corrugated metal expansion joints, the difference is that the outer layer of non-metallic expansion joints is composed of fabric parts, common types are rectangular, round two, performance and price is better than the corrugated metal expansion joints, so the customer vigorously promote the application. The fabric part of non-metallic expansion joint is also called non-metallic expansion joint skin, non-metallic fabric skin, non-metallic skin, non-metallic compensator ring belt, is made of excellent performance of silicone rubber fabric or fluorine rubber fabric and alkali-free glass fiber cloth and other multi-layer composite, is a high-strength sealing composite material. Fabric part of the addition of stainless steel wire mesh, can stop the flow of debris in the medium into the expansion joint and stop the expansion joint in the insulation material outward dissipation. Non-metallic expansion joints have the same connection methods as corrugated metal expansion joints, flange connection and receiver connection.
 
The non-metallic expansion joint includes a left frame and a right frame, and a ring belt, the right end of the left frame and the left end of the right frame are provided with outward flanges, and the two ends of the ring belt are attached to the above flanges by pressing devices; the left frame is provided with a stepped guide cylinder, the large end of which is attached to the left frame and the small end is placed between the left and right frames; the right frame is provided with an inner liner cylinder, one end of which is attached to the right frame end and the other end The diameter of the small end of the guide barrel is smaller than the diameter of the liner barrel, and the small end of the guide barrel extends into the liner barrel. The large-diameter non-metallic expansion joint has a reasonable design, simple structure, easy to use, and can ensure sufficient radial displacement without increasing the external dimensions. At the same time, the natural downward offset of this expansion joint in use can precisely seal the gap, effectively preventing the entry of dust and prolonging the service life of the equipment. Non-metallic expansion joint fabric part of the insulation layer materials used, according to the different working temperatures, commonly used glass fiber cloth, PTFE film, composite rubber fiberglass cloth, aluminum silicate fiber cotton and other materials.