Writer： admin Time：2021-09-10 09:19 Browse：℃
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Welding metal bellows to see the application of the bellows in the instrumentation. Its opening end is fixed, the sealing end is in a free state, and the auxiliary coil spring or reed is used to increase the elasticity. When working, under the action of internal pressure, it stretches along the length of the pipe, causing the movable end to produce a displacement in a certain relationship with the pressure. The movable end drives the pointer to directly indicate the size of the pressure. Bellows are often combined with displacement sensors to form a pressure sensor that outputs electricity, and is sometimes used as an isolation element. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. The bellows is suitable for measuring low pressure. The bellows mainly include metal bellows, corrugated shrink joints, corrugated heat exchange tubes, diaphragm diaphragms and metal hoses. Metal bellows are mainly used to compensate pipeline thermal deformation, shock absorption, and absorb pipeline settlement deformation. It is widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Corrugated pipes of other materials such as plastics play an irreplaceable role in the fields of media transportation, power threading, machine tools, household appliances, etc. Corrugated pipes: a pressure measuring elastic element in pressure measuring instruments. It is a cylindrical thin-walled corrugated shell with multiple transverse corrugations. The bellows is elastic and can produce displacement under the action of pressure, axial force, transverse force or bending moment. |
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