Hollow spherical valve plug and manufacturing method thereof

Abstract

The invention discloses a hollow spherical valve plug and a manufacturing method thereof. The valve plug comprises a main body and an inner sleeve pipe, wherein the inner sleeve pipe penetrates through the main body, the main body is a hollow spherical body which is formed by symmetrically welding a stainless steel left hemisphere and a stainless steel right hemisphere, the inner wall of the hollow spherical body is provided with a reinforcing block, an opening which penetrates through the outer wall and the reinforcing block of the main body is arranged on the main body, the valve plug is cut into a disc plate type blank by a stainless steel plate, the blank is rotatably pressed or drawn to be the left hemisphere and the right hemisphere, the left hemisphere and the right hemisphere are welded to be the hollow spherical main body, the reinforcing block is welded on the inner wall of the main body, a stainless steel seamless pipe is manufactured into an inner sleeve pipe which is pressed into the main body, the opening is arranged on the main body which is provided with the reinforcing block, and a hollow spherical valve plug finished product is formed by mechanically cutting the main body and polishing the surface of the main body. The hollow spherical valve plug is formed by welding the hollow hemispheres made of stainless steel materials, has simple technology and strong exploitativeness, high corrosion resistance, high wear resistance, long service life, stable structure and high strength and is easy to obtain use materials.

Description

technical field [0001] The invention relates to a ball valve plug and a manufacturing method thereof, in particular to a hollow spherical valve plug and a manufacturing method thereof. Background technique [0002] A valve is a component used to control the flow of fluid in a pipeline. There are many types of it, and the more common ones are ball valves and globe valves. The working principle of the ball valve is to use the rotation of the spherical valve plug in the valve body to change the sealing size of the flow channel hole of the valve body to change the flow rate, or to rotate 90. Completely close the flow channel hole to achieve the purpose of controlling the flow or closing the valve. The ball valve plug plays an important role in the ball valve. Typically, ball valve plugs are manufactured from plain steel, copper or aluminum. Due to the good extensibility and plasticity of ordinary steel, copper or aluminum, using forging or stamping technology, the plate can b...

AI Technical Summary

Problems solved by technology

[0004] In addition, the air entrained in the fluid will also cause corrosion to the spherical valve plug made of ordinary steel, affecting the service life of the valve plug

In addition, because copper and aluminum are relatively soft, they are not wear-resistant

Mechanical particles in the fluid will cause wear to the spherical valve plug made of copper or aluminum, which also affects the service life of the valve plug

The 304 stainless steel with a thickness of 3-5mm can resist the corrosion of acidic substances and entrained air. Its own hardness is high, and it has both corrosion resistance and wear resistance. It is a good material for manufacturing hollow spherical valve plugs. Because of its above two characteristics, it cannot be used as a raw material to manufacture hollow spherical valve plugs using traditional methods

Images