Ultra-fast opening stop valve and its opening and closing method

Abstract

The invention relates to an ultra-fast opening stop valve and its opening and closing method, which solves the problems of excessive opening torque and long opening time of the stop valve. It includes a valve body, a valve cover, a valve disc and a valve stem. The valve disc, the valve cover is placed on the upper surface of the valve body, the valve stem runs through the valve cover, connects with the valve disc, and constitutes the axial linkage between the valve stem and the valve disc, and also includes the power mechanism, oil cylinder mechanism, limit mechanism and trigger mechanism , the opening and closing method opens the stop valve through the power mechanism, and through the cooperation of the limit mechanism and the oil cylinder mechanism, the valve stem is fixed at the open position or the valve stem is driven to close the valve, reducing the number of moving parts when the valve is opened, thereby reducing Opening time, so that the opening time ≤ 0.15 seconds, and reduce the requirements for electromagnetic force, the electromagnetic force of the power mechanism > 200N can complete the opening action, and at the same time use the electric signal to trigger the action of the oil cylinder mechanism, driving the limit mechanism to limit the valve stem. Position, to achieve the fixation of the valve stem.

Description

technical field [0001] The invention relates to a valve, in particular to an ultra-fast opening stop valve and an opening and closing method thereof. Background technique [0002] The opening and closing part of the globe valve is a plug-shaped disc, the sealing surface is flat or conical, and the disc moves linearly along the center line of the valve seat. The movement form of the valve stem has a lifting rod and a rotating lifting rod, which can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Therefore, this This type of shut-off globe valve is very suitable for cutting or regulating and throttling. Because the opening or closing stroke of the valve stem of this type of valve is relatively short, and it has a very reliable cut-off function, and because the change of the valve seat opening is proportional to the stroke of the valve disc, it is very suitable for flow adj...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 20131068809.5 (hydraulic pump anti-cavitation stop valve) describes a stop valve, which uses the positioning of the steel ball and the valve opening detection switch and the steel ball and the valve closing detection switch to realize the automatic positioning of the valve stem, but the above functions Realization, the friction between the steel ball and the positioning block is unavoidable. Since the steel ball is connected with the tension spring, the friction here is very large. During the rising process of the valve stem, it is necessary to overcome the friction here, or increase the electromagnetic force , or increase the opening time

Images