Fluoroplastic full-lined globe valve with strong corrosion resistance and particle resistance

Abstract

The invention discloses a fluoroplastic full-lined globe valve with strong corrosion resistance and particle resistance, and relates to the technical field of design and production of valves. A valveseat is arranged in a valve body. A valve clack is cooperatively arranged on the valve seat. A valve stem is connectedly arranged on the upper end of the valve clack. The valve stem extends out of a valve cover. A dynamic sealing structure is arranged between the valve stem and the valve cover. A transmission nut is arranged on the valve cover. A transmission screw rod is cooperatively arranged inthe transmission nut. A handwheel is connected to one end of the transmission screw rod. A guide block for connecting the transmission screw rod and the valve stem is arranged between the other end of the transmission screw rod and the end, extending out of the valve cover, of the valve stem. According to the invention, the transmission screw rod and the valve stem are separately arranged and areconnected to each other through the guide block. The connection is floating. The valve stem only performs lifting movements but not rotary movements, and so the sealing surface of the valve clack andthe sealing surface of the valve body are not adhesively worn and the sealing performance is good. Meanwhile, the wear between the valve stem and a filling material is also reduced to ensure that a medium does not leak from the valve stem.

Description

technical field [0001] The invention relates to the technical field of valve design and production. Background technique [0002] At present, it is used in the chemical industry for chlorine gas, chlorine water, hydrogen chloride, refined brine, high-purity hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, aqua regia, lye and other highly corrosive and oxidizing medium pipelines to control the flow of medium. It is an ordinary lined globe valve. Since it does not have the characteristics of a special valve in terms of material selection or valve structure, on the one hand, the performance of this valve is unstable, the sealing effect is not good, the sealing surface is easy to be crushed, and it is easy to leak; On the one hand, under the corrosive, toxic and harmful process conditions, the corrosion resistance is poor, easy to leak, the lining layer is easy to bulge and fall off, and the valve body and valve cover base are easy to corrode and perforate a...

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Problems solved by technology

[0002] At present, it is used in the chemical industry for chlorine gas, chlorine water, hydrogen chloride, refined brine, high-purity hydrochloric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, aqua regia, lye and other highly corrosive and oxidizing medium pipelines to control the flow of medium. It is an ordinary lined globe valve. Since it does not have the characteristics of a special valve in terms of material selection or valve structure, on the one hand, the performance of this valve is unstable, the sealing effect is not good, the sealing surface is easy to be crushed, and it is easy to leak; On the one hand, under the corrosive, toxic and harmful process conditions, the corrosion resistance is poor, easy to leak, the lining layer is easy to bulge and fall off, and the valve body and valve cover base are easy to corrode and perforate after the lining layer is damaged, and the damage of the lining layer leads to The overall service life of the valve is short, which cannot meet the special requirements of long-term effective transmission of medium, and once the toxic medium leaks, it will bring great harm to the surrounding environment and personal safety.

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