Directly-buried maintenance-free axial conjointed sleeve compensator

Abstract

The invention discloses a directly-buried maintenance-free axial conjointed sleeve compensator, which comprises two coaxial sleeve compensators and heat preservation structures, wherein the two sleeve compensators are opposite to one end of a sealing seat and hermetically and coaxially connected through an intermediate connecting pipe to form an external heat perseveration structure which is formed by winding a heat perseveration layer on the outer wall after conjoint connection and wrapping by a shell, an end-face heat perseveration structure which moves along with an inner pipe and is formed by filling a heat perseveration layer in a cavity between a sleeve and the inner pipe, and an inner heat perseveration structure which is formed by winding a heat perseveration material on the outer wall of the inner pipe between a gland and an end face plate. According to the invention, through the coaxial connection between the two sleeve compensators and one end of the sealing seat, the coaxial precision is guaranteed, the two sleeve compensators can independently bear to absorb or compensate the axial movement and rotation of a connecting pipeline and can do an equidirectional action simultaneously. Because the two coaxially-connected sleeve compensators cooperatively act in the same structure, the directly-buried maintenance-free axial conjointed sleeve compensator has large compensation amount and flexibility and can meet difference compensation requirement of a heat supply piping network. According to the invention, because the back-to-back connection is adopted, the axial size is short, and the mating cost is greatly reduced.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular to a sleeve compensator buried underground and directly connected to a matching heat pipe network. Background technique [0002] The heat pipe network is composed of criss-cross pipe systems. The temperature and pressure of the medium in the pipes caused by the inconsistent working conditions and unequal loads of the pipes in different directions will inevitably produce corresponding unequal and different internal stresses in different directions. The connected pipe network is destructive. The traditional sleeve compensator is the best pipeline safety device for absorbing or compensating the axial force. It is a common choice to configure the sleeve compensator in the heat pipe network. From the perspective of safety and thermal insulation structure, the sleeve compensator matching the heat pipe network is generally buried underground in the project. China Patent No.: ZL 2010206894452 "...

AI Technical Summary

Problems solved by technology

In the prior art, since there is only one sleeve compensator, the compensation amount is limited, and the application occasions have certain limitations, which cannot meet the supporting requirements of thermal pipe networks with relatively complex structures or unstable working conditions.

In view of such situations, two sleeve compensators in series in the axial direction are used in the project to increase the compensation amount. Although this structure can achieve the expected purpose theoretically, the implementation effect is not good. First, the axial dimension is relatively long. The supporting ground wells also increase accordingly, thus directly increasing the supporting cost

Another problem is that the two connected sleeve compensators are not easy to achieve the designed coaxiality, and the poor coaxial accuracy directly affects the normal performance of the absorption or compensation function

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