The structure of the bellows mainly includes the following parts:
Basic structure: The bellows usually consists of an outer tube, a metal protective shell, a sleeve and a connecting tube. A metal protective shell is fixedly installed at one end of the outer tube, a sleeve is fixedly arranged inside the metal protective shell, a connecting tube is slidably sleeved inside the sleeve, and one end of the connecting tube is fixedly connected to the inner tube.
Reinforced structural wall composite pipe: This kind of bellows includes a tube body and a corrugated part connected to the outer peripheral surface of the tube body, and a reinforcing rib is connected between two adjacent corrugated parts. The height of the reinforcing rib in the radial direction is lower than the crest height of the corrugated part, and an arc top rib is also provided at the connection between the reinforcing rib and the corrugated part to improve the radial stiffness and impact strength of the pipe.
Rust-proof steel belt strong skeleton polyethylene spiral corrugated pipe: This kind of bellows includes a bellows, a fixed shell and an extended shell. The inner wall of the fixed shell is fixedly connected with a connecting block, which is fixedly connected to the outside of the bellows. Sliding grooves are provided on both sides of the fixed shell, and an extended shell is slidably connected in the sliding groove. A connecting spring is fixedly connected to the side wall of the extended shell to protect the bellows exposed to the air.
Corrugated heat exchange tube: The corrugated heat exchange tube is generally formed by secondary processing of seamless stainless steel tubes, and its longitudinal section is a continuous corrugation formed by tangent arcs of different radii. The wall thickness of this kind of bellows is less than 1 mm, the diameter is small but the tube is long, and there are periodic corrugations in the longitudinal structure, which is difficult to produce and process.
Corrugated tube heat exchanger: The bellows heat exchanger is processed by special technology on the basis of ordinary heat exchange tubes. It has a concave and convex corrugated structure inside and outside, which can enhance heat transfer. The structure of the bellows heat exchanger can be divided into four structural types according to the form of the tube sheet, shell and its matching parts: fixed tube sheet type, floating head type, kettle type and U-tube type.