Novel connecting method for pipelines with different pipe diameters and made of different materials

Abstract

The invention discloses a novel connecting method for pipelines with different pipe diameters and made of materials. The novel connecting method is characterized by comprising the following steps that firstly, a blocking plate with the thickness of 2 m is arranged at the position, 5 m away from a water return branch hole, in the water return branch hole, the blocking plate, a connecting pipe made of concrete and branch hole linings at the position of the water return branch hole are poured at a time, no construction seam is reserved, during blocking plate pouring, rigid waterproof casing pipes are buried in the position, at the end of a connecting steel pipe, in the middle portion of the blocking plate, and due to the fact that the waterproof casing pipes are provided with wing rings, it can be ensured that the rigid waterproof casing pipes and the blocking plate are closely combined without water leakage; and secondly, a section of phi 630 steel pipe with a flange is installed at the end of the steel pipe in advance, the length of the phi 630 steel pipe is 300 mm, and sealing water preventing is conducted between the steel pipe and the casing pipes through baffle rings, batched jute and asbestos cement. By means of the novel connecting method, pipeline cracks, caused by differential settlement between a mountain and a soil layer, at the positions of the mountain and a dredging tank are avoided, the dredging work of the dredging tank is avoided, the labor force is saved, leakage of sewage containing toxic metal is prevented, and safety is high.

Description

technical field [0001] The invention belongs to a new method for connecting pipes of different pipe diameters and materials used in tailings water recovery operations. Background technique [0002] A large amount of tailings are produced in the beneficiation production. Due to the limitation of the existing technology, they can only be discharged into the tailings warehouse in the state of ore slurry for storage. Due to the addition of flotation agents and metal elements in the ore during the beneficiation process, the tailings water often contains a large amount of agents and harmful substances. When these harmful substances in the tailings water fail to meet the discharge standards, it will not only damage the environment and waste resources, but also face legal accountability. Recycling tailings water is a method commonly used by mineral processing enterprises to save resources and protect the environment. [0003] The upstream of the existing tailings water return syst...

AI Technical Summary

Problems solved by technology

However, the simple welding used for the connection between existing reinforced concrete pipes and steel pipes will cause leakage after long-

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