Nodular cast iron pipe preheating equipment

Abstract

The invention provides nodular cast iron pipe preheating equipment, and belongs to the technical field of nodular cast iron pipes. The equipment comprises a transportation assembly, a sleeve and an induction coil. The transportation assembly is used for bearing the cast iron pipes and moving the cast iron pipes along with the axial direction of the cast iron pipes. The sleeve is used for forming achannel through which the cast iron pipes pass. The induction coil is fixedly arranged on the inner wall of the sleeve and is used for generating eddy currents in the cast iron pipes under the condition of electrification so as to heat the cast iron pipes. According to the nodular cast iron pipe preheating equipment, the cast iron pipes do not need to be heated by a large gas heating furnace, sothat the occupied space is saved; the heating efficiency of the cast iron pipes is improved, and uniform heating for the cast iron pipes can be ensured; an electromagnetic coil replaces gas to avoid hidden dangers of gas leakage and the like, heating for the cast iron pipes is controlled by controlling the induction coil to be power on or off, convenience and safety are higher, and energy waste isreduced.

Description

technical field [0001] The invention belongs to the technical field of ductile iron pipes, and more specifically relates to a preheating equipment for ductile iron pipes. Background technique [0002] During the production process of ductile iron pipes, asphalt paint, polyurethane, epoxy resin and other coatings need to be sprayed on the inner or outer surface. It is necessary to preheat the fan cast iron pipe before spraying to ensure that it has a temperature between 80 and 120°C, which can increase the quality of the coating. [0003] At present, the preheating method of ductile iron pipes is to use a gas preheating furnace for preheating. Due to the large volume of the ductile iron pipe itself, the corresponding gas preheating furnace occupies a very large space; and the gas preheating furnace is used for preheating. During the preheating process, the heat source is mainly concentrated at the bottom of the ductile iron pipe, so that the bottom of the ductile iron pipe i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a nodular cast iron pipe preheating equipment, aiming to solve the technical problems of low efficiency of the existing gas preheating furnace, uneven heating of the cast pipe, waste of energy and easy occurrence of gas leakage

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