Underground steel bushing steel steam pipeline insulating layer restoring device and method thereof

Abstract

The invention relates to a device for restoring underground heat distribution pipelines to solve the technical problems during filling of the underground steel bushing steel steam pipeline insulating layer. A restoring device comprises a venturi pipe; an inlet portion of the venturi pipe is provided with a high-pressure blow pipe and a powder funnel; a diffusion end of the venture tube is communicated with the insulating layer; an exhaust pipe is fixed by a far end; thermal insulation particles are added to the powder funnel, particle scattering to an insulating layer chamber is achieved through high-pressure air flows in the venturi pipe, and a purpose of insulating material filling is achieved. The restoring device is reasonable in structure, the restoring method is scientific and practical, and accordingly an excellent technical effect of insulating material filling of the pipeline is achieved.

Description

[0001] Technical field: [0002] The invention relates to a device and a method for repairing the thermal insulation layer of an underground steel-sheathed steel steam pipe. Background technique : [0003] Thermal power plants need to build supporting heating networks, and due to the requirements of urban construction landscapes, most of the backbone networks are required to be laid underground. Therefore, under such circumstances, thermal steel-sheathed steel process pipes have begun to be fully popularized in the construction of heating networks. The so-called thermal steel-sheathed steel process pipe means that an outer casing is arranged outside the steam pipe, and an insulating material is filled in the cavity between the steam pipe and the outer casing. In practical application, it is found that when the pipeline leaks, it is necessary to find out the leak point, cut off the outer casing, and peel off the insulation layer to repair the leakage of the steam pipe. S...

AI Technical Summary

Problems solved by technology

The long-term crux of the problem is the aftermath of severe heat damage after overhaul, because the internal insulation layer of the pipeline is all made of rock wool, and the rock wool is boiled by leaking high-pressure and high-temperature water, the insulation material is severely damaged, and most of the insulation layer is missing and invalid. , so that the pipeline loses its insulation effect and causes huge heat loss. According to field measurements, the temperature of the outer casing of a steel-sheathed steel pipeline without insulation can reach 100-120 degrees, which increases the heat loss of the pipeline.

In recent years, the thermal insulation failure defect caused by the internal leakage of the steel-sheathed steel pipe has been affecting the economic operation of the heating network.

However, if the thermal insulation recovery construction is carried out, a large area of ​​excavation is required, the outer casing of the pipeline is cut, and then the thermal insulation material is filled to restore the thermal insulation. The amount of work is huge, and it is necessary to destroy the ground roads, greening, and network facilities in the area where the heating network passes. wait

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