A water delivery pipeline used for connecting and replacing underground FRP sand pipes and steel pipes

Abstract

A water pipeline for use in connection and replacement of an underground fiber-reinforced plastic mortar pipe and steel pipe, comprising steel water pipes (2), flanged connecting pipes (1), and reinforced concrete supporting piers (7). Flange plates (3) are welded to one extremity of two among the steel water pipes (2). Two positioning steel plates (10) for preventing misaligned joining of steel pipes are welded to the inner wall at one extremity of the remaining steel water pipes (2). The flanged connecting pipes (1) are connected to the flanged plates (3) of the steel water pipes (2) via one extremity of the flanged plates (3), while a groove (9) is provided at the outer wall of the other extremity. A flexible ring (4) is filled in the groove (9). The extremity provided with the groove is inserted into a fiber-reinforced plastic mortar pipe (6) to be joined therewith. The steel water pipes are welded together. The apparatus has simple construction techniques. The apparatus is simple. Replacement steps are simple and convenient.

Description

【Technical field】 [0001] The invention relates to an underground water delivery pipeline, in particular to a water delivery pipeline used for connecting and replacing an underground glass fiber reinforced plastic sand pipe and a steel pipe. 【Background technique】 [0002] At present, many underground water supply pipes are made of FRP sand pipes, which have the advantages of simple structure, cheap price, and good sealing performance. However, the FRP sand-filled pipe has poor pressure bearing capacity and cannot withstand excessive external pressure. Once the foundation facilities such as bridge piers are laid next to the underground FRP sand-filled pipe, the FRP sand-filled pipe will not be able to withstand the pressure imposed by these facilities. explosion due to pressure. Therefore, in many places where the underground water supply pipes are FRP sand-filled pipes, once the above situation is encountered, the FRP sand-filled pipes will be replaced. However, the current...

AI Technical Summary

Problems solved by technology

However, the FRP sand-filled pipe has poor pressure bearing capacity and cannot withstand excessive external pressure. Once the foundation facilities such as bridge piers are laid next to the underground FRP sand-filled pipe, the FRP sand-filled pipe will not be able to withstand the pressure imposed by these facilities. explosion caused by pressure

Therefore, in many places where the underground water supply pipes are FRP sand-filled pipes, once the above situation is encountered, the FRP sand-filled pipes will be replaced. However, the current replacement device cannot achieve quick replacement well, and the quality is not good enough. This phenomenon Urgent need to improve

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