Method for preparing agriculture anti-freezing composite pipe

Abstract

The invention belongs to a production technique of farm hydraulic pipelines especially to farm freezing resistive complex pipelines. The technique include following steps: a. use non-metal pipe as inner pipe; b. the production of outer sleeve pipe which includes pulling the outer sleeve pipe shaping mould on the inner pipe and then pouring in the material between the mould and the inner pipe, the constitution of the material is raw magnesite powder : pearlstone or sawdust = 5 to 8 : 1, mix up above contents by above rate and surge with magnesium chloride into soup, solidificate the poured in material in the mould for 2 to 4 hours at 15 to 28 deg. C and then demould after preserving and air drying. The invention resolves the problem that existing tech is of unsatisfied heat insulation effect, high cost and short service life. It has got ageing eroding and low temperature resistance, acquires protection and heat insulation double functions, and low producing and installing cost.

Description

technical field [0001] The invention belongs to a preparation method of an agricultural water delivery pipeline, in particular to a preparation method of an agricultural antifreeze composite pipeline. Background technique [0002] At present, the most effective water-saving project in well irrigation areas is anti-seepage water delivery through underground pipelines, which has been accepted by farmers. With the popularization and application of the water-saving technology of anti-seepage water delivery in underground anti-seepage pipelines in agricultural production, the demand for its accessories is increasing day by day. However, most of the current pipe outlet fittings are made of cast iron. This outlet fitting has the following disadvantages: [0003] 1. Because it is made of cast iron, it is often destroyed by people and sold as scrap steel and cannot be used normally, resulting in production loss; [0004] 2. In order to prevent damage and theft, most areas have to ...

AI Technical Summary

Problems solved by technology

[0003] 1. Because it is made of cast iron, it is often destroyed by people and sold as scrap steel and cannot be used normally, resulting in production losses;

[0004] 2. In order to prevent damage and theft, most areas have to install a protective shell on each water outlet, which increases the investment by more than 50%, and brings a lot of inconvenience to the use; in some places, the water outlet elbow is covered with concrete. The following parts are poured on site, and the elbow part is still exposed outside, so the protection effect is not great

[0005] 3. Due to the rising price of metal materials, in order to reduce costs, manufacturers have to minimize the amount of materials used, thus shortening the service life of products

According to the survey, the service life of the cast iron outlets currently used is only 3-5 years;

[0006] 4. Due to the lack of heat preservation measures, it often causes freezing cracks or freezing blockages in winter and cannot be used normally.