Pneumatic quick-opening shutter butterfly valve

Abstract

The invention relates to a pneumatic quick-opening shutter butterfly valve. A valve body is composed of a plurality of butterfly plates, each butterfly plate is provided with an independent driving device which is used for controlling the opening or closing motion of the butterfly plate, and the functions of adjustable speed of quick opening (or quick closing) and slow closing (or slow opening), stopping of closing (or opening) position and the like are achieved through the shutter butterfly valve with an air source as power; as a plurality of sets of independently-driven butterfly plates are arranged in the shutter butterfly valve, when one set of butterfly plate breaks down and cannot be normally started, and the other sets of butterfly plates are not influenced and can still normally used, the using reliability is improved, and the defect that in an original product, when one set of butterfly plate is damaged, the overall shutter butterfly valve is influenced and cannot be normally used is avoided. The pneumatic quick-opening shutter butterfly valve is suitable for quick exhausting under emergency conditions of West-East natural gas transmission compressor station tail gas waste heat power generation projects.

Description

【Technical field】 [0001] The invention relates to the technical field of valves, and in particular to a differential pressure power generation system using gas such as natural gas to prevent rapid discharge of flue gas when the system fails, so as to prevent damage to system equipment caused by pressure suffocation. 【Background technique】 [0002] The 430°C-510°C flue gas discharged by compressor-driven gas turbines in the first and second lines of the West-East Gas Pipeline is directly discharged into the atmosphere, which not only wastes energy but also pollutes the environment. With the continuous research and development and improvement of gas turbine exhaust waste heat recovery and utilization devices and systems, it will be widely used; such as CN203892022, U201420336413.2 "A Gas Turbine Exhaust Heat Recovery and Utilization Device and System" records the gas turbine exhaust waste heat recovery of the system Taking advantage of the failure of the steam power generation...

AI Technical Summary

Problems solved by technology

At present, the safety valve generally adopts a pneumatic louver valve. The structure of the existing louver butterfly valve is such as the Chinese patent number ZL201420303312.5 "Valve Quick Opening and Fast Closing Hydraulic Control System" ZL201420601862.5 "A Shutter Valve", 201420279055.6 "A Manual Shutter Valve", 200920153662.7 "Rigid Shutter Valve", and 200820002187.9 "Pneumatic Shutter Valve" generally use a driving device to drive the entire shutter valve. Since the valve is used in emergency situations, its reliability requirements are very high. It is very thin and easy to deform under high temperature. If there is a valve plate and valve shaft deformation, it will directly affect the sealing effect, which will seriously prevent the entire shutter valve from opening normally. In addition, due to the use of a driving device, its starting torque is large, and it is necessary to use an air cylinder or oil cylinder. Increase the cylinder bore or stroke, thus increasing the air consumption or oil consumption, thereby reducing the opening speed

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