A Reliably Sealed Self-Closing Sealed Rotary Compensator

Abstract

The invention provides a self-sealed type rotating compensator reliable to seal. The self-sealed type rotating compensator comprises a reducing pipe and a core pipe. One side of the core pipe is installed in the reducing pipe in a sleeved mode. A first sealing structure is arranged between the reducing pipe and the core pipe and comprises an annular flexible sealing body. The section of the flexible sealing body is in a U shape. The flexible sealing body is installed outside the core pipe in a sleeving mode. An inner ring and an outer ring of the flexible sealing body make contact with the outer wall of the core pipe and the inner wall of the reducing pipe respectively. The opening end of the U-shaped section of the flexible sealing body makes contact with the core pipe. A plurality of radial through holes are formed in the portion, corresponding to the opening end of the U-shaped section of the flexible sealing body, on the periphery of the core pipe. The diameter of each radial through hole is smaller than the opening width of the opening end of the U-shaped section of the flexible sealing body. By means of the arranged double sealing structures, the reliable self-sealing effect is achieved, and leakage is effectively avoided; a mode of forming a limiting groove in the single side is adopted for locating a steel ball, so that the axial and radial stability of the steel ball is greatly improved, and the phenomenon of sticking caused by free changing of the position of the steel ball is eliminated.

Description

technical field [0001] The invention relates to a pipe network component, in particular to a rotary compensator with reliable self-sealing performance and stable rotary supplementary performance. Background technique [0002] The rotary compensator is a compensator developed on the basis of the sleeve compensator. It is mainly used for steam and hot water pipeline systems laid overhead, and its design pressure is 0.1-10.0Mpa. Rotary compensators need to be arranged in groups of two or three when installed on thermal pipelines to form relative rotation to absorb thermal displacement of pipelines and reduce pipeline stress. Because the rotary compensator has the advantages of large single-group compensation and safe operation, it is widely used in the heating pipe network piping technology. Commonly used self-closing and sealing rotary compensators are mainly composed of different diameter pipes, sealing rings, outer pipes, integral sealing rings, sealing seats, steel balls, ...

AI Technical Summary

Problems solved by technology

However, in practical applications, ordinary self-closing and sealed rotary compensators have the following disadvantages: 1. It cannot ensure that the compression force on the sealing ring is evenly distributed on the circumference, and there are hidden dangers of leakage in local areas with small compression force; 2. . During installation and use, the rotary compensator has a certain angular deformation. In this case, there will be a local gap on the circumference of the sealing ring, which will cause leakage; 3. The packing is easy to wear and cannot be filled after wear; 4. Steel balls are used as The main rotating parts lack the necessary limit and are prone to jamming, which makes the rotary compensator unable to achieve stable rotation compensation

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