Self-sealing connecting flange joint for double-wall corrugated pipeline

Abstract

The invention discloses a double-wall corrugated pipeline self-sealing connection flange joint which is characterized in that the double-wall corrugated pipeline self-sealing connection flange joint comprises a cylindrical flange joint shell (6), a sealing ring (4) is arranged in the flange joint shell (6), an anti-disengaging pre-tightening pressing ring (3) is arranged at an inlet of the flange joint shell (6), and the sealing ring (4) is fixed by the anti-disengaging pre-tightening pressing ring (3) through a pre-tightening screw (2) and a nut (5). A first binding face (29) is arranged on the outer surface, close to the sealing ring tail end face (31), of the sealing ring (4), and an annular groove (27) is formed in the back face of the first binding face (29). According to the flange joint, through the design of a self-sealing structure, the self-sealing of a pipeline connecting part is realized by actively utilizing the accumulation of flowing silt in a pipe network, the connection is provided with multiple sealing parts, the on-line forming of a bell-and-spigot joint and a bell-and-spigot joint at a pipeline port is avoided, and an anti-falling detachable structure is adopted; reworking disassembly and reinstallation of the water leakage point at the position of the pipe network closed water test connector can be achieved.

Description

technical field [0001] The invention relates to a double-wall corrugated pipeline self-sealing connection flange joint, which belongs to the technical field of pipeline sealing. Background technique [0002] In the 1980s, plastic double-wall corrugated pipes were introduced to the market and widely used in major drainage and irrigation pipe network systems. After years of technological development in my country, we have been able to produce multi-specification plastic double-wall corrugated pipes that meet the needs of the existing market. The connection between existing plastic double-wall corrugated pipes often adopts socket connection. The two ends of the corresponding pipe are socket and socket respectively. As a whole; the socket connection adopted is to insert the socket plug with rubber sealing ring in the trough into the socket, and realize the radial sealing of the plastic double-wall corrugated pipe at the socket through the elastic deformation of the rubber sealin...

AI Technical Summary

Problems solved by technology

However, as time goes by, the sediment contained in the sewage flowing in the pipe network will accumulate at the rubber sealing ring, and the radial sealing position of the rubber sealing ring will be squeezed axially, and the sediment extrusion force will increase over time. The larger and larger, causing the axial deformation and slippage of the rubber sealing ring, which will eventually lead to the leakage of the pipe network at the connection position

At the same time, due to the limitations of the molding process, the socket is generally a solid-wall structure with thin wall thickness. Compared with the double-wall corrugated main body of the pipe, the socket has the weakest strength, is difficult to form, and has insufficient external pressure load capacity. At the same time, the pipe after socketing , may fall off over time

Moreover, the larger the diameter of the pipe, the more difficult the socket connection and the more difficult the construction

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