The internal structure of an expansion joint (compensator) can vary from type to type, but here I will describe several common types of expansion joint internal structures, including metal bellows expansion joints and non-metal expansion joints.
Internal structure of metal bellows expansion joint:
Bellows(Bellows): This is the core component of the expansion joint, consisting of a series of corrugations capable of absorbing axial, lateral, and angular displacements.
Take over(Piping End): A cylindrical component at both ends of a bellows for connection to a Piping system.
gasket ring(Gasket Ring): Placed between the connector and the pipe for enhanced sealing.
Liner barrel(Inner Sleeve): Located inside the bellows, it is used to direct the flow of fluid and prevent the medium from directly impacting the bellows.
ear plate(Flange Ears): for connecting Flange Ears Expands to the flange portion of the pipe.
Double-headed stud(Stud Bolt): A fastener connecting the ear plate to the pipe flange.
nut(Nut): Used with double-headed studs, used to tighten the connection between the expansion joint and the pipe.
Internal structure of non-metal expansion joint:
Liner(Wear-Resistant Layer): Layer that contacts the medium directly and is made of high temperature and corrosion Resistant materials. Thermal insulation(Insulation Layer): Located between the inner liner Layer and the outer cladding Layer to reduce heat loss.
Outer coating(Covering Layer): Protective Layer, made of weather-resistant material, protects the expansion joint from the external environment.
Heat insulating dust jacket(Dust Shield): Optional component to protect the insulation layer from Dust and impurities.
skin(Skin): Covers the outer surface of the non-metallic expansion joint, providing additional protection and sealing.
wear-resistant layer(Abrasion-Resistant Layer): Located on the inner side, it is used to resist the wear of the medium.
baffle(Guide Plate): It is used to divert flow and protect the insulation layer, so as to avoid the direct erosion of the insulation material by the medium.
These structural drawings and descriptions provide a basic concept of the internal construction of the expansion joint, but the specific design and components may vary depending on the manufacturer and application. It varies with needs. In practical applications, the expansion joint may also include auxiliary components such as pull rods, limiting devices, guide brackets, etc. to control the movement of the expansion joint and ensure its normal operation.