Top-mounting fixation ball valve

Abstract

The invention discloses a top-mounting fixation ball valve. The ball valve comprises valve seats, a valve body, a valve ball, a valve rod and a handle. An inflow channel, an outflow channel and a valve cavity communicating the inflow channel and the outflow channel are formed in the valve body. The valve ball is arranged in the valve cavity and is supported on the valve body through a left valve seat and a right valve seat. The valve body is forged integrally, a valve rod hole for the valve ball to penetrate is formed in the valve body and is covered with a valve bonnet in seal connection with the valve body, a press sleeve flange in seal connection with the valve bonnet is arranged on the valve bonnet, an ejection flange in fixed seal connection with the press sleeve flange is arranged on the press sleeve flange, and the valve rod penetrates the valve bonnet, the press sleeve flange and the ejection flange through the valve rod hole to be in transmission connection with the handle. The valve bonnet, the valve ball and the valve seats are mounted and dismounted through the valve rod hole in the upper portion of the valve body. According to ball valve, pipe stress is not applied, valve body leakage points are reduced, and the medium leakage probability is reduced.

Description

technical field [0001] The invention relates to a ball valve, in particular to a top-mounted fixed ball valve, which belongs to the technical field of valves. Background technique [0002] Ball valves are widely used in various fields such as petroleum, chemical industry, steel, metallurgy and electric power. Compared with other valves that control the flow of medium in pipelines, ball valves have the advantages of small medium resistance and convenient operation. However, due to its low compressive strength, PTEF produces cold flow when its compressive strength is exceeded, which makes the resilience worse. This phenomenon makes it difficult for the material to be used in pressure grades above 300Lb, or in ball valves with a size of 300Lb above 12". Nylon, Polyether ether ketone resin is widely used in ball valves with a pressure rating above 30Lb or a size of 300Lb above 12” due to its high compressive strength, but because of its friction coefficient more than 10 times th...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a top-mounted fixed ball valve, which solves the inconvenience of maintenance of the ball valve in the prior art and the inability to realize online maintenance. The technical problem of low pipeline production efficiency, and at the same time solve the technical problem of the poor sealing effect of the ball valve in the prior art, which leads to the easy leakage of the fluid medium

Images