Non-thrust self-sealing rotary compensator

Abstract

The invention relates to a non-thrust self-sealing rotary compensator which comprises an outer sleeve, a core pipe and a packing gland. An anti-disengaging limiting protruding ring is arranged in an inner cavity at one end of an annular flange of the outer sleeve; a boss is arranged at the end of the core pipe, a self-sealing sliding block is arranged between the boss and the packing gland, and sealing packing is arranged between the self-sealing sliding block and the packing gland; and a self-sealing sliding space is formed between the self-sealing sliding block and the anti-disengaging limiting protruding ring, and a reserved assembling gap is formed between the packing gland and the annular flange of the outer sleeve. Sealing of the compensator can form a positive correlation self-sealing effect along with the change of the pressure of a pipeline medium, and safe use in a high-pressure state is guaranteed. When the pipeline pressure is low, the rotating resistance of the core pipe is reduced at the same time, the rated rotating torque is reduced by about two thirds, and flexible operation of the compensator is facilitated. The non-thrust self-sealing rotary compensator is good in sealing effect, high in bearing strength, long in service life and convenient to install. The non-thrust self-sealing rotary compensator is particularly suitable for high-temperature and high-pressure heat supply pipe networks and is safe and reliable to use.

Description

technical field [0001] The invention relates to the technical field of pipeline compensators, in particular to a non-thrust self-sealing rotary compensator. Background technique [0002] The pipeline compensator generally compensates the displacement of the pipeline by stretching or rotating the sliding core tube, and uses sealing packing to keep the pipeline sealed and prevent medium leakage. For pipelines conveying high-temperature and high-pressure media, due to the inevitable assembly gap of the pipeline compensator and the low strength of traditional sealing packing, coupled with the action of high-temperature and high-pressure media, the sealing packing will be damaged during the deflection and displacement of the compensator The loss is large. On the other hand, the assembly gap of the traditional pipeline compensator is usually designed to be close to the outer surface of the inner core pipe. During the working process, the medium will penetrate along the assembly g...

AI Technical Summary

Problems solved by technology

The rotating parts of the rotary compensator have a relatively large fit gap. Under the thrust of the pipeline, the relative rotation stability of the inner and outer tubes is poor, and it is easy to produce eccentric deflection of different axes and increase the rotation resistance. 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

If the discovery and maintenance are not timely, it may even lead to safety production accidents

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