An easy-to-operate dual-purpose control valve

Abstract

The invention provides a dual-purpose control valve that is convenient to operate, including a valve body assembly and an actuator assembly. The valve body assembly includes a valve body, a valve stem and a valve core. The valve body is provided with a valve seat, and the actuator assembly drives the valve stem to drive the valve core. Lifting, the valve core and the valve seat can cooperate and seal, which is characterized in that the valve core is sleeved on the outside of the valve stem, the valve stem is connected with the valve core by a limit clamping unit, and an emergency control assembly is also included. The emergency control assembly includes an unlocking unit. The unlocking unit passes through the interference limit clamping unit from the center of the valve stem to release the limit, and the valve core can slide axially along the valve stem. By setting the unlocking unit to cooperate with the limit clamping unit for unlocking, in the case of failure of the actuator, the valve core slides freely relative to the valve stem to realize the valve opening. The structure is simple and reliable, and effectively makes up for the need to manually The need to operate the valve to open and close.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a dual-purpose control valve with convenient operation. Background technique [0002] The valve is a mechanical device that controls the flow, direction, pressure, temperature, etc. of the flowing fluid medium. The valve is the basic component in the piping system. The valve fitting is technically the same as the pump, and is often discussed as a separate category. The valve can be manually Or electric, electric valve action force distance is larger than ordinary valve, electric valve opening and closing speed can be adjusted, can be used to control various types of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media The flow of fluid, the electric valve is simply to use the electric actuator to control the valve, so as to realize the opening and closing of the valve. If the existing electric valve actuator fails, it is not easy to control the...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a dual-purpose control valve that is convenient to operate. By setting the unlocking unit to cooperate with the limit clamping unit to unlock, the valve core can slide freely relative to the valve stem in the case of failure of the actuator, and the valve can be realized. Open, the structure is simple and reliable, which effectively makes up for the need to manually operate the valve to open and close in the event of a power failure, and solves the technical problem that the valve cannot be opened and closed normally when the valve actuator fails in the prior art.

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