Encased concrete nodular cast iron pipe manufacturing device

Abstract

The invention discloses an encased concrete nodular cast iron pipe manufacturing device and relates to the technical field of nodular cast iron pipe manufacturing equipment. The device comprises a movable trolley and riding wheel sets arranged at the two ends of the trolley and driven by motors, wherein the two ends of a nodular cast iron pipe are erected on the riding wheel sets through a bellmouth rolling ring and a socket rolling ring respectively, a concrete roller shoot mechanism and a scraper sizing structure are arranged above the nodular cast iron pipe, a steel wire gauze feeding mechanism is arranged on one side of the nodular cast iron pipe, and band-shaped steel wire gauze can be wound around the nodular cast iron pipe coated with concrete in a spiral mode by means of the steel wire gauze feeding mechanism along with the rotation of the nodular cast iron pipe and the movement of the trolley; the scraper sizing structure is an arc-shaped plate matched with the outer circle of the nodular cast iron pipe, and a toothed plate and a fine scraping plate are arranged at the two ends of the arc-shaped plate respectively to be used for cutting off redundant concrete and trowelling grooves formed after cutting; in this way, surface roughness is improved, and the labor intensity of workers is relieved. The device is high in mechanization degree and capable of improving working efficiency and product quality.

Description

technical field [0001] The invention relates to the technical field of production equipment for ductile iron pipes, in particular to a production device for ductile iron pipes covered with concrete. Background technique [0002] With the improvement of environmental protection requirements, the increase of excavation costs and the increase of occasions where excavation cannot be performed due to construction restrictions, people urgently need to study the use of non-excavation laying or trenchless laying technology. The document "Outsourcing Concrete Ductile Iron Pipe" CN202708364 U proposes a kind of outsourcing concrete ductile iron pipe for pipe jacking (a laying technology without pipe ditch) construction. There are three main methods of making this outsourcing concrete: pouring method, extrusion method and spraying method. Among them, the spraying method is divided into roller injection method and spraying method. At present, the production of outsourcing concrete for ...

AI Technical Summary

Problems solved by technology

This process is not only inefficient, but also labor-intensive. It also requires a large number of molds for each specification, and the investment cost is relatively high.

[0004] The thick wall of concrete in the spraying concrete process of PCCP pipe is relatively thin, generally at 20mm, which is quite different from the thickness of the concrete ductile iron pipe. Although the weight pipe can achieve a relatively thick spray volume, However, the quality of its outer surface is very poor and the outer diameter cannot be guaranteed accurately, while the pipe jacking must require precise outer diameter and smooth surface

Images