Butterfly valve body casting process

Abstract

The invention relates to a butterfly valve body casting process which comprises the following steps that firstly, a mold drawing is designed according to a product drawing, a special mold is manufactured according to the mold drawing, and whether the mold is qualified or not is checked; magnetic bars are embedded into magnetic bar mounting grooves of core box split bodies, a circle of chilling blocks are installed in a core box main body, and sand is charged into the core box provided with the chilling blocks to form a sand core; the prepared sand core is matched with a template; molten iron melting and pouring are conducted; shakeout treatment is carried out; and inspecting and storing are performed, and casting of a butterfly valve body is completed. The casting process provided by the invention has the advantages that the chilling blocks can be conveniently fixed to the sand core through cooperation of the special mold, so that the chilling purpose can be conveniently achieved in the subsequent pouring molten iron cooling process, and the shrinkage phenomenon is effectively prevented.

Description

technical field [0001] The invention relates to the field of disc valve processing, in particular to a casting process for a disc valve body. Background technique [0002] Disc valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline medium. A valve with shut off. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the disc valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. [0003] At present, in the process of processing the valve body of the butterfly valve, it is usually formed by casting. In the process of casting, mold plates, core boxes, sand cores, etc. are used. The characte...

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of processing the valve body of the butterfly valve, it is usually formed by casting. In the process of casting, mold plates, core boxes, sand cores, etc. are used. The characteristics, that is, the middle of the valve body is a hollow cavity, so when forming the middle cavity, it is necessary to set the corresponding sand core in the middle of the mold plate, and when casting with such a structure, when the valve body is close to the middle sand core The inner wall of one side will cause shrinkage cavity due to inconsistent cooling, which will lead to the scrapping of the produced product

Images