Centrifugal spheroidal cast iron pipe with plastic lining

Abstract

The invention discloses a plastic lining eccentric spheroidal graphite, which includes a spheroidal graphite body and a inner lining pipe, the inner lining pipe is high molecular poly resin pipe, the two arrange with banding layer; it also discloses the manufacturing method for above mentioned plastic lining spheroidal graphite, the inner wall is pasted with banding agent, the pipe is assembled onto the frame of the extension mechanism; the grip holder core pole is penetrated through the plastic lining pipe, the cone core and the cone grip holder nut on the front part of the grip holder core pole of the grip holder core pole clamp the cone end of the plastic lining; then adjusts the adjusting nut back of the grip holder core pole, the spring penetrating on back of the grip holder core pole is supported by another end of the plastic lining; the extension mechanism pulls the inner lining pipe through the diameter shrinkage model and pulls it into the spheroidal graphite; when the inner lining pipes all goes into the spheroidal graphite and is amended, carries on thermal process to the spheroidal graphite.

Description

technical field [0001] The invention relates to a conveying pipeline and a manufacturing method thereof, in particular to a plastic-lined centrifugal nodular cast iron pipe and a manufacturing method thereof. Background technique [0002] Centrifugal ductile iron pipe has high strength (3 times that of gray cast iron pipe), good elongation (≥10%, while gray cast iron pipe is 0) and corrosion resistance (30 times higher than steel pipe). According to relevant earthquake research data, the damage rate of centrifugal ductile iron pipes in earthquakes is 1 / 4 of that of gray cast iron pipes. Due to its unique structure, it is suitable for construction and installation under various terrain conditions. At the same time, due to the simple and convenient installation method, the project progress is accelerated, thereby reducing the construction cost. Compared with steel pipe construction, it can reduce 1 / 3 of the cost. One of the most popular building materials. [0003] At presen...

AI Technical Summary

Problems solved by technology

The cement lining is used as the pipeline of the drinking water transmission and distribution system. Because the inner wall is not smooth, the water flow resistance is large and it is easy to scale and grow microorganisms. The gases and substances precipitated by the cement will seriously affect the water quality and cause secondary pollution of the water; In addition, the specific proportion of cement will increase the weight of the overall pipeline, which is not convenient for construction and installation, so the cement lining is not a good lining material

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