Ultra-high pressure self-sealing rotary compensator

Abstract

The invention relates to an ultra-high pressure self-sealing rotary compensator. The ultra-high pressure self-sealing rotary compensator comprises an inner rotary pipe, an outer sleeve, gland packing and a reducer, wherein the inner rotary pipe is arranged in the outer sleeve, the outer sleeve is connected with the reducer, an annular boss is arranged on the outer surface of the inner rotary pipe, a steel ball is arranged between the boss and the outer sleeve, a packing chamber is formed between the annular boss and the reducer, the gland packing is arranged in the packing chamber, and a belleville spring is arranged between the gland packing and the reducer. Compared with the prior art, due to the facts that the steel ball is arranged between the annular boss of the inner rotary pipe and the outer sleeve, and the belleville spring is arranged between the gland packing and the reducer, the self-sealing function can be achieved. A steel ball rotation friction pair can bear large rotation torque, and is flexible in rotation. The gland packing can be kept in a good sealing state for a long time through the belleville spring. The ultra-high pressure self-sealing rotary compensator is applicable to an ultra-high pressure heat-supply pipe network, large in amount of displacement compensation, good in sealing performance, and safe and reliable in use.

Description

technical field [0001] The invention relates to a pipeline compensator, in particular to a self-sealing rotary compensator suitable for ultra-high pressure pipelines. Background technique [0002] When the thermal pipe network of urban heating network, electric power, metallurgy, petrochemical and other industries transports steam, hot water or high-temperature water medium, due to the thermal expansion and contraction of the pipeline due to the influence of the medium temperature, a sleeve telescopic compensator or a rotary compensator is generally used. Compensation displacement. The sleeve expansion joint is mainly composed of the shell, the sliding core tube and the sealing packing. Due to the sleeve type expansion joint, the displacement of its compensation pipe is compensated by the expansion and contraction of the sliding core tube. The compensation capacity is limited by the structure, and the sliding core tube and the packing The seal between them cannot be kept in...

AI Technical Summary

Problems solved by technology

The sleeve expansion joint is mainly composed of the shell, the sliding core tube and the sealing packing. Due to the sleeve type expansion joint, the displacement of its compensation pipe is compensated by the expansion and contraction of the sliding core tube. The compensation capacity is limited by the structure, and the sliding core tube and the packing The seal between them cannot be kept in good condition for a long time, and it is easy to leak after long-term use, which will cause heat loss in the pipeline and affect economic benefits and environmental protection

[0003] At present, the rotary compensator used in the heat pipe network is usually of casing type, and there is a sealing packing cavity between the inner and outer pipes. The sealing packing is put into the sealing cavity, and the sealing packing is pressed by the packing gland to realize the sealing. , but in the environment of high temperature and high pressure, there are the following problems: 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 pipes, which is easy to produce eccentric deflection of different axes, thereby increasing the rotation resistance and reducing the The flexibility of rotation compensation

In order to solve the above problems, the existing technology usually uses steel balls or rolling bearings as rolling friction pairs to control the coaxial rotation of the inner and outer tubes. However, after a period of use of the compensator, the sealing performance of the sealing packing between the inner and outer tubes will be greatly reduced, resulting in a fail, leak

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