Fixed-length sensing device as well as automatic fixed-length cutting device and method of plastic-steel winding pipe

Abstract

The invention relates to a fixed-length sensing device as well as an automatic fixed-length cutting device and method of a plastic-steel winding pipe. The fixed-length sensing device provided by the invention comprises a rack, a roller shaft, a connecting rod, a limiting switch, a return spring and a limiting switch triggering part for triggering the switch-on and switch-off of the limiting switching, wherein one end of the roller shaft is hinged with the rack, and the other end of the roller shaft is hinged with one end of the connecting rod; the other end of the connecting rod is hinged with the limiting switch triggering part; and one end of the return spring is hinged with the rack and the other end of the return spring is fixedly connected with the roller shaft. The roller shaft is provided with a running roller rotating around the roller shaft. The invention also provides the automatic fixed-length cutting device and of the plastic-steel winding pipe. The invention has the beneficial effects that the limiting switch is triggered by virtue of the limiting switch triggering part, thus being beneficial to realization of automatic fixed-length cutting of the plastic-steel winding pipe.

Description

technical field [0001] The invention relates to pipeline forming, in particular to a fixed-length sensing device in pipeline forming, an automatic fixed-length cutting device and method for plastic-steel winding pipes. Background technique [0002] Plastic-steel winding pipe is a new type of steel-plastic composite gravity self-flowing pipe product. It is made of steel-plastic composite special-shaped strips that are spirally wound and welded (extruded and welded on the overlapping surface). The inner wall is smooth and flat, and the outer wall has a spiral shape. Convex ribs, this kind of pipe has the advantages of corrosion resistance, light weight, easy installation, large flow rate, and long life. It can replace pipes made of high-energy-consuming materials (cement, cast iron, ceramics, etc.), and is an environmentally friendly green product. [0003] However, compared with the traditional pure plastic pipe, the plastic-steel winding pipe also has its own defects. The ou...

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Problems solved by technology

[0003] However, compared with the traditional pure plastic pipe, the plastic-steel winding pipe also has its own defects. The outer wall of the traditional pure plastic pipe is smooth and flat, and the fixed-length induction can be realized by using the traditional limit switch, while the plastic-steel winding pipe is controlled by the strip spiral. Due to the influence of winding, the outer wall has spiral ribs and unevenness. In addition, during the forming process of the plastic-steel winding pipe, there is not only the feeding in the extrusion direction, but also the rotation movement, so that the traditional limit switch cannot be used for plastic-steel winding. The fixed-length cutting induction of the pipe makes it impossible to realize the automatic and fixed-length cutting of the plastic-steel winding pipe, and can only be cut manually, which affects the stability and continuity of the production of the plastic-steel winding pipe

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