A cement-lined inner mill for ductile iron pipes

Abstract

The invention discloses a nodular cast iron pipe cement-lining internal mill, and belongs to the technical field of grinding machines. The nodular cast iron pipe cement-lining internal mill comprises an axial feed gear, a radial feed gear, a grinding head device and an air spring, wherein the axial feed gear is a base trolley which is capable of being driven by a walking motor to move transversely; the radial feed gear is a rack which is driven by a hydraulic cylinder and is capable of moving longitudinally on the base trolley; the grinding head device is provided with a grinding wheel capable of extending into a nodular cast iron pipe, and a swing arm box of a grinding head motor; the base trolley is located on a rail way; the rack is located on the base trolley; the swing arm box is located on the rack; one end of the swing arm box is hinged to the rack; the air spring is arranged between the other end of the swing arm box and the rack; the air spring is connected with a compressed air source. The nodular cast iron pipe cement-lining internal mill disclosed by the invention is simple in structure and convenient to operate; the grinding vibration is reduced to be the lowest by the air spring, so that the cement-lining processing quality of the nodular cast iron pipe is ensured, the labor intensity is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of grinding machines. Background technique [0002] The ductile iron pipe cement lining inner mill is used to grind the inner wall of the cast pipe to improve the roughness of the inner wall, which belongs to the equipment of the cast pipe packaging line. At present, there are two main ways to realize the cement-lined internal grinding machine for ductile iron pipes: one is that the motor drives the grinding wheel through a long-distance transmission shaft, as shown in the document "Centrifugal Ductile Iron Pipe Technology and Equipment" P228; the other is that the motor is located on the grinding wheel End short-distance transmission, as shown in the grinding drive mechanism of the inner mill of the large-diameter cast iron pipe production line (CN 101797706 A). The disadvantages of the above two methods are: in the first method, the swing arm shell is raised and lowered mechanically, which is inconvenient...

AI Technical Summary

Problems solved by technology

The disadvantages of the above two methods are: in the first method, the swing arm shell is raised and lowered mechanically, which is inconvenient to adjust; in the second method, because the motor is installed at the front end of the grinding head, the vibration of the tube wall is increased during the grinding process trace

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