Pneumatic corrugated pipe type three-way adjusting valve

Abstract

The invention disclose a pneumatic corrugated pipe three-way adjusting valve, which comprises an actuating mechanism and a valve part arranged below the actuating mechanism, wherein the valve part comprises a three-way valve body, an upper valve base, a lower valve base, a valve core component, a valve rod, an upper valve cover, a lower valve cover and the like, wherein the upper and lower valve bases are connected with the valve body through five screw threads; and the valve part has a dual-layer sealing structure formed by a stainless metal corrugated pipe and a polytetrafluoroethylene V-shaped filler, so that a medium is prevented from leaking. A high-rigidity air cylinder type actuating mechanism is provided, and unbalance force generated by a very high fluid can be resisted, so that the pneumatic corrugated pipe three-way adjusting valve can be opened and closed optionally on converging and shunting occasions; and if a converging occasion is required to be changed into a shunting occasion or a shunting occasion is required to be changed into a converging occasion due to process change, or a user selects a wrong valve, the three-way valve can be used without being replaced, so that unnecessary troubles are reduced, and funds are saved for the user.

Description

technical field [0001] The invention relates to a novel pneumatic bellows type three-way regulating valve used in automatic control systems of industrial processes such as chemical industry, petrochemical industry, papermaking and environmental protection. Background technique [0002] The common pneumatic three-way regulating valve currently used in the pipelines of industrial process automatic control systems such as chemical, petrochemical, papermaking, and environmental protection is divided into two types: one is the pneumatic three-way confluence regulating valve, which is used to connect the two inlets One end fluid is synthesized into one outlet end fluid; the other is a pneumatic three-way diverter regulating valve, which divides an inlet end fluid into two outlet end fluids; they are used for confluence or diversion respectively. Due to the lack of valve structure design, the three-way confluence regulating valve and the three-way diversion regulating valve cannot ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a double-acting cylinder type actuator with a spring for the problems existing in the existing common pneumatic three-way regulating valve, and the valve part is equipped with an automatic centering snap-in damping Valve seat, stainless steel metal bellows and double-layer sealing device of PTFE V-shaped packing, specially designed valve core and cage, new pneumatic bellows type three-way regulating valve with newly designed valve body flow path; it can be used as both It can be used in confluence occasions and diversion occasions, and has the advantages of good sealing, strong versatility, safety and reliability, and long service life. It is especially suitable for highly toxic, volatile, easy-permeable, easy-to-pollution environments and rare and precious media. important occasion

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