Novel clamp type butterfly valve

Abstract

The invention provides a novel material and technology suitable for a clamp type butterfly valve body. The novel clamp type butterfly valve is characterized in that a seamless steel tube after cutting is subjected to groove processing by a machine tool according to standards, then a valve body and a valve neck are welded to form the novel clamp type butterfly valve, and a traditionally used valve body casted by ductile cast iron is replaced. The firefighting clamp type butterfly valve is also called a firefighting groove butterfly valve or a groove type (clamp) connecting valve and has the advantages as follows: the mounting is rapid, simple, safe and reliable and is not limited by a mounting field, maintenance of a pipeline and the valve is facilitated, vibration isolation and sound isolation effects are realized, variance generated by non-coaxiality of pipeline connection is overcome in certain angle range, problems of heat expansion and cold contraction caused by temperature difference are solved and the like; the novel clamp type butterfly valve is widely applied to fluid conveying pipelines of pipeline projects such as water supply and drainage, firefighting, air conditioners, gas, petroleum, chemical industry, water treatment, municipal administration, shipbuilding and the like and is used for controlling the fluid.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a novel clamp butterfly valve. Background technique [0002] The traditional clamp butterfly valve body is mainly made of cast valve body. Although there are more flexible choices in materials, from gray iron, ductile iron to ordinary carbon steel, due to the characteristics of casting itself, casting defects such as pores, sand inclusions, Shrinkage / porosity limits the pressure rating of cast valves, resulting in large machining allowances and low yields. Even precision castings have casting defects: such as molding shrinkage holes, trachoma points, shape surfaces, and pouring holes. There are not many restrictions in terms of size. [0003] The material of the ductile iron pipe is ductile iron. Due to its production process, the production of castings requires a large number of casting workers, which also causes certain pollution to the environment. [0004] For t...

AI Technical Summary

Problems solved by technology

[0003] The material of the ductile iron pipe is ductile iron. Due to its production process, the production of castings requires a large number of casting workers, which also causes certain pollution to the environment.

Images