Steel belt reinforced PVC pipe

Abstract

The invention relates to the technical field of PVC pipelines, and particularly relates to a steel belt reinforced PVC pipe. The steel belt reinforced PVC pipe comprises an outer-layer polyethylene pipe, a steel belt layer and an inner-layer polyethylene pipe, wherein a first flange plate is fixedly arranged at one end of the inner-layer polyethylene pipe; a mounting cylinder is fixedly arranged at the position, close to the outer side of the inner-layer polyethylene pipe, of the side surface of one end of the first flange plate; a protection mechanism is fixedly arranged at the edge position of one end, far away from the first flange plate, of the mounting cylinder; a cavity is formed in the mounting cylinder, and a connecting mechanism is arranged at the bottom in the cavity. According to the steel belt reinforced PVC pipe, a connecting structure is arranged, and the outer-layer polyethylene pipe and the inner-layer polyethylene pipe are fixed by utilizing a clamping connection type structure; and compared with a threaded screwing structure in the prior art, the longitudinal connecting strength of the connecting position of the outer-layer polyethylene pipe and the inner-layer polyethylene pipe is improved, so that the connecting structure can still work normally under the stress impact of heat expansion and cold contraction of the pipeline, and then the overall connecting stability of the steel belt reinforced PVC pipe is improved.

Description

technical field [0001] The invention relates to the technical field of PVC pipes, in particular to a steel belt reinforced PVC pipe. Background technique [0002] Steel belt reinforced PVC pipe, as the name suggests, is a polyethylene plastic pipe with a steel belt. The steel belt reinforced pipe for buried drainage uses high-density polyethylene as the matrix, and the steel belt coated with adhesive resin on the surface is formed into a corrugated form as the main pipe. The supporting structure is wound and compounded with polyethylene material to form an integral double-walled spiral tube. [0003] In the existing steel belt reinforced PVC pipe, the outer layer of polyethylene, the steel belt and the inner layer of polyethylene are bonded with adhesive resin. Under high temperature working conditions, the adhesive resin is prone to heat failure and loss of adhesive performance. This further leads to the failure of the connection between the outer layer of polyethylene, th...

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Problems solved by technology

[0005] The above comparative patent uses a combined threaded screw connection structure to assemble and fix the steel belt reinforced PVC pipe, which reduces the workload of assembling the steel belt reinforced PVC pipe, and also It solves the problem that the existing steel belt reinforced PVC pipe is easy to fail and fall off under high temperature working conditions. However, for the steel belt reinforced pipe with a larger diameter for buried drainage, it will be subject to greater thermal expansion and contraction during use. Stress, under the action of ambient temperature, produces expansion and contraction deformation. For the connection structure of the patented threaded screw connection, its longitudinal connection strength is low. Under the stress of thermal expansion and contraction of the pipeline, the threaded connection position is repeatedly subjected to Stretching and shrinking impacts can easily cause the threaded connection to fail, and then cause the connection of the inner and outer PVC pipes to fall off, reducing the overall connection stability of the steel belt reinforced PVC pipe

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