Whole type high-pressure anti-explosion seal-seal maintaining-free revolving compensator and manufacturing method thereof

Abstract

The invention relates to a whole type high-pressure anti-explosion seal-seal maintaining-free revolving compensator and a manufacturing method thereof. The compensator comprises a rotating pipe and an outer casing pipe, the rotating pipe is sleeved with the outer casing pipe, the outer casing pipe is provided with a limiting ring, the other end is provided with a conical shrinkage pipe, and the conical shrinkage pipe and the outer casing pipe are of a whole structure; a conical annular boss is arranged on the end of the rotating pipe, a spherical convex ring is arranged on the side face of the conical boss, and framework composite seal packing is arranged between the annular boss and the limiting ring. The manufacturing method comprises the steps that firstly, the conical annular boss and the spherical convex ring are machined; secondly, the framework composite seal packing is arranged; thirdly, the outer casing pipe carries out hot pressing stretching on the conical shrinkage pipe. The compensator is suitable for a high-pressure heat-supply pipe network, the structure is simple, whole welding is not needed, the pressure bearing strength is large, no eccentricity exists, seal performance is good, use is safe and reliable, the product service life is long, and in the whole life cycle of a pipeline, the compensator does not need to be replaced.

Description

technical field [0001] The invention relates to the technical field of pipeline compensators, in particular to an integral high-pressure explosion-proof self-sealing maintenance-free rotary compensator and a manufacturing method thereof. Background technique [0002] At present, when the existing heat pipe network transports hot water, steam and other high-temperature media, due to the thermal expansion and contraction of the pipeline due to the influence of the medium temperature, the telescopic compensator or rotary compensator is generally used to compensate the displacement of the pipeline. Because the displacement of the compensation pipe is compensated by the expansion and contraction of the sliding core tube, the compensation ability of the sleeve expansion joint is limited by the structure, and the seal between the sliding core tube and the packing cannot be kept in good condition for a long time, and it is prone to leakage after long-term use. The structure of the r...

AI Technical Summary

Problems solved by technology

[0003] Existing rotary compensators generally have the following problems in high-temperature and high-pressure environments: the fit gap between the rotating parts is large, and the relative rotation stability of the inner and outer pipes is poor due to the thrust of the pipeline, which is prone to eccentric deflection of different axes and increases the rotation resistance , reducing the flexibility of rotation compensation

In the prior art, steel balls are usually used as the rolling friction pair to control the coaxial rotation of the inner and outer tubes. The structure is complex and the processing is difficult.

The bearing load of the steel ball is small, and it is easy to wear or be crushed when used in high-pressure pipelines. After a period of use, it will affect the sealing performance of the sealing packing, resulting in sealing failure and leakage.

resulting in heat loss in the pipeline

If it is not found and maintained in time, it may even cause safety production accidents, which will not only directly affect economic benefits, but also cause environmental problems.

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