Directly buried maintenance-free sleeve compensator

Abstract

The invention discloses a directly buried maintenance-free sleeve compensator. The directly buried maintenance-free sleeve compensator comprises an inner pipe, a sleeve, a shell, heat insulating materials, a gland, a screw bolt assembly, a filler and an outer pipe; the inner pipe is provided with an outer circular boss; a left end face of the boss is coaxially and fixedly connected with the sleeve; the outer pipe is provided with an inner circular boss; the gland is sleeved on the inner pipe to be in clearance fit with a large hole of the outer pipe; the filler is fully filled between the gland and the inner circular boss of the outer pipe; and the gland is connected with a flange of the outer pipe through the screw bolt assembly to form a sealed adjustment structure. The flange of the outer pipe is fixedly connected with a right end of the sleeved shell; and the inner wall of a left end of the shell is in clearance fit with the outer circular boss of the inner pipe and the outer wall of the sleeve respectively. The heat insulating materials are arranged in cavities on two sides of the outer circular boss of the inner pipe respectively to form a built-in insulation structure. In addition, wear layers are arranged on the middle section of the inner wall of the shell which is easy to wear and on the outer wall of the right section of the inner pipe respectively. The built-in insulation structure and the sealed adjustment structure cannot be polluted by external environment during operation; and the capacity of keeping leak tightness is high. The two structures can be used as the directly buried maintenance-free sleeve compensator with various specifications.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular to a sleeve compensator buried underground and directly matched with a heat pipe network. Background technique [0002] Sleeve compensator is a kind of pipeline safety device with traditional structure. It consists of a pair of relatively moving sealing pairs composed of coaxial inner and outer tubes and their sealing materials. This structure has strong axial expansion and contraction compensation capabilities and certain The rotation compensation ability can completely eliminate the deformation caused by thermal expansion and contraction due to the change of medium temperature during the operation of urban heating and industrial pipe networks. In urban heating and industrial pipeline network projects, the supporting sleeve compensator is often installed underground due to structural or process requirements, and the installation of pipeline compensators underground is conducive to safety...

AI Technical Summary

Problems solved by technology

However, due to changes in installation conditions and environmental restrictions, casing compensators that move frequently can easily cause the insulation layer of the outer cover to shift and lose its insulation effect

The disadvantage of the existing technology is that the sealing structure of the direct-buried sleeve compensator is exposed, and it is easy to form a negative pressure condition during the axial compensation movement to inhale dust and soil. Once the dirt enters the sealing structure, it will increase its wear and tear directly. Reduce the service life of the sealing pair

In addition, the casing compensator is located underground, which is inconvenient to observe the operation situation, and the leakage of the sealing pair cannot be adjusted in time, and the continuous leakage will easily cause safety hazards

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