Connecting structure of socket self-sealing pipe in rigid-flexible interference fit

Abstract

The invention relates to the technical field of pipeline construction, and provides a connecting structure of a socket self-sealing pipe in rigid-flexible interference fit. The connecting structure comprises a flexible pipe fitting and a rigid connecting pipe, wherein socket heads are arranged at the two ends of the connecting pipe; a socket opening is formed in the inner side of one end or the inner sides of the two ends of the pipe fitting; the outer diameter of each socket head is in interference fit with the inner diameter of the socket opening; and the pipe fitting and the connecting pipe are connected by inserting the socket heads into the socket opening. According to the connecting structure, interference fit self-sealing is adopted, so that the risk of installation leakage is avoided; retaining teeth are arranged on the socket heads, so that the tensile strength of the pipe fitting after being connected with the connecting pipe is improved; a baffle is arranged in the middle of the connecting pipe, so that the socket heads and the socket opening are matched in place, the baffle directly abuts against the end part of the pipe fitting, and pipe jacking construction is facilitated; and the problem that a rigid material joint is prone to cracking during jacking deviation correction is solved, the problem that the stress at the socket opening of the flexible pipe fitting is poor is solved, and the problem of corrosion prevention of the inner wall of the connecting pipe is solved.

Description

technical field [0001] The invention relates to the technical field of pipeline construction, in particular to a connection structure of a rigid-flexible interference-fit socket and self-sealing pipe. Background technique [0002] With the further development of urbanization and the gradual improvement of rural living conditions, the demand for public infrastructure and household water supply and drainage has further increased, and construction work such as pipeline installation and maintenance is inseparable. [0003] The reinforced concrete pipe joints of the socket joints are not tensile-resistant, the water-stop performance is not high, the pipe material is heavy, and the corrosion resistance is poor. Therefore, HDPE solid-wall pipes have broad market application prospects. In the installation and maintenance of pipelines, such as in the non-excavation construction of drainage pipelines, in many cases there is not enough construction space on one side, so oblique drillin...

AI Technical Summary

Problems solved by technology

These pipeline interface methods have the following disadvantages in the non-excavation construction of municipal pipelines: 1) The hot-melt butt joint requires a certain site space and can only be constructed after the butt joint is completed. The inner flanging needs to be removed; 2) The electric hot-melt connection is dangerous in places with water, which is not convenient for construction, and it is easy to collapse the pipe during welding, resulting in leaks; 3) The heat-shrinkable tape connection has a slightly lower strength and large The diameter of the pipeline is unevenly heated, which is inconvenient; 4) The clamp connection is not suitable for trenchless construction, the integrity of the pipeline connection is not strong, the sealing performance is poor, the pipeline interface is easy to disconnect, and the ability to withstand tension and vibration is limited

[0006] 1. The sealing ring socket interface is HDPE solid wall sealing pipe. The HDPE solid wall short pipe joint of the socket interface is cut out with a socket at one end and a socket at one end. The sealing ring is used to seal and stop water, but the sealing ring is socketed. The HDPE solid-wall short pipe joints at the interface are not well airtight and have no pull-out resistance. Although they can be used for non-excavation lining repairs, they are easily disconnected and cannot be used for pipe jacking construction

[0007] 2. HDPE extruded solid-wall pipe with serrated double-sealed self-locking socket interface, because the pipe is produced by extrusion, most of the extruded pipes formed by cooling are elliptical and have relatively large residual stress on the pipe wall, plastic extruded pipes When processing flexible joints, the wall thickness of the processed joints will be different and have large tolerances due to the ellipse of the pipe material. During the construction process, it will be difficult to install due to the uneven wall thickness of the joints. Water seepage is not easy enough, and it is easy to tear the pipe due to the uneven force caused by the uneven interface during the installation process. During the tearing process, due to the large internal stress of the extruded pipe, it will cause continuous tearing. for pipe jacking construction

[0008] 3. Sawtooth double-seal composite winding solid wall pipe, the processing technology of this pipe has been improved, and the material is tonality, the pipe produced is relatively round, which basically meets the processing and construction requirements of the flexible interface, but the pipe itself is all plastic, physical The performance has the advantages and disadvantages of the plastic material itself. The joint has weak links after processing, and it cannot meet all construction environments in terms of shear force and sealing performance. Therefore, although this product is an excellent product in the current market, it also needs to comply with the performance selection of plastics. Conditions of construction environment use

[0009] In the non-excavation laying and repair construction of municipal drainage pipelines, although the above-mentioned various types of pipes have simple interface HDPE solid-wall pipe joints that can be installed in a small space, they have the advantages of convenient connection, good airtight performance, tensile resistance, and convenient installation. It has the advantages of running pipes in inspection wells or working wells, and can be jacked into the interior of the original pipes for replacement. However, the pipes with the above interface methods cannot meet the requirements of various soil types and various construction methods in complex environments.

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