Full steel framework enhanced plug type composite pipe

Abstract

The invention provides a steel framework enhanced plug type composite pipe, which comprises a main framework semi-product and an auxiliary framework semi-product which are respectively manufactured through a casting or stamping process, and a socket welding main pipe semi-product and a socket welding auxiliary pipe semi-product are respectively manufactured through an injection molding process and a plastic spraying process and are connected to form the product at the end of the two frameworks. In the main framework, the socket welding main pipe outer wall is formed by a large tapered wall, a small tapered wall and a cylinder wall, an inner layer front part of the main framework is the framework body and forms the front inner wall of the socket welding main pipe, and the socket welding cavity wall and an overflow cavity wall form the socket welding main pipe rear inner wall. A front end of the main framework is an inner cone V trumpet shape, and the rear end of the main framework forms a groove and a sealing ring adapted to the groove. The steel framework enhanced plug type composite pipe overcomes the defects such as polyethylene resin composite pipes and cast iron pipes, cast steel pipes, steel pipes, PE pipes, PVC pipes, PPR pipes and plastic pipes can not be exchanged, separation is caused by thermal expansion difference during connection, non-roundness increases at a joint position, it is easy to crack during welding and water leakage, gas leakage and pollution to the environment due to the breakage connection beyond the half section length.

Description

technical field [0001] The invention relates to a steel frame reinforced socket type composite pipe. Background technique [0002] Existing polyethylene (PE) resin plastic composite pipes for water supply, gas supply, and liquid supply, in order to improve the performance and prolong the service life of plastic composite pipes, people have adopted steel mesh reinforcement or steel belt reinforcement or steel wire two-way winding reinforcement and Socket reinforcement and other measures and treatment methods, although the plastic composite pipe after these measures and treatment has enhanced axial rigidity and geological subsidence resistance, there are still the following problems: First, the connection between the sockets of the two pipes is uneven. It uses electric fusion pipe welding. During welding, due to the high temperature, the thermal expansion coefficients of the two materials, that is, steel wire and plastic, are different, resulting in rapid stress cracking and s...

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Problems solved by technology

[0002] Existing polyethylene (PE) resin plastic composite pipes for water supply, gas supply, and liquid supply, in order to improve the performance and prolong the service life of plastic composite pipes, people have adopted steel mesh reinforcement or steel belt reinforcement or steel wire two-way winding reinforcement and Socket reinforcement and other measures and treatment methods, although the plastic composite pipe after these measures and treatment has enhanced axial rigidity and geological subsidence resistance, there are still the following problems: First, the connection between the sockets of the two pipes is uneven. It uses electric fusion pipe welding. During welding, due to the high temperature, the thermal expansion coefficients of the two materials, that is, steel wire and plastic, are different, resulting in rapid stress cracking and separation of the two, resulting in leakage at the joint of the socket; second, pipes with the same diameter It adopts hot-melt butt joint. Due to the influence of construction environment or personnel operation technology, the mutual lateral movement and dislocation of the pipe walls will increase the non-roundness of the pipe butt joint, making it difficult to ensure the quality of the butt joint; third, During the maintenance process of existing PE pipes, if the broken part of the pipe is within the length of the Harfur joint, it can be connected with a Harvester joint. Maintenance of PE pipes, due to the high toughness of PE pipes, it shrinks greatly due to temperature changes, which is prone to serious losses of resources such as water leakage, gas leakage, liquid leakage, and secondary pollution to the environment caused by gas leakage; The ethylene composite pipe is a polyethylene electrofusion pipe. When connecting, the inner plastic of the pipe is melted and connected with the inner plastic of the pipe by using the heating element inside the pipe. Therefore, it must be energized during installation, and the use in remote and mountainous areas will be affected to a certain extent; Fifth, the welding equipment is heavy and must be transported by car, which is expensive and laborious, and the installation cost is too high; moreover, they cannot be interchanged with national standard ductile iron pipes, cast steel pipes, PE pipes, PVC pipes, and PPR pipes, resulting in system failure. Difficult to maintain, waste of resources

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