Valve rod of acting valve

Abstract

A valve rod of an acting valve comprises a valve rod body, one end face of the valve rod body is provided with an oil duct in the axial direction, two or more combined angle oil-passing holes communicating with the outside are connected to an outlet of the oil duct, a first included angle is formed between the axes of the combined angle oil-passing holes and the axis of the oil duct in the Y direction, and a second included angle is formed between the axes of the combined angle oil-passing holes and the axis of the oil duct in the X direction. When the acting valve performs the separating / combining action, the valve rod body moves in the axial direction under the differential pressure action, fluid passes through the combined angle oil-passing holes under the action of pressure, angular component force is generated for the valve rod body, and then the valve rod body can move forwards spirally. Meanwhile, the fluid passing through the combined angle oil-passing holes forms a vortex, andturbulence is avoided. The speed and stability of the axial motion process of the valve rod body can be improved under the combined action of rotation of the valve rod body and the fluid vortex. Onlythe non-fit dimension of the valve rod body is changed, neither the assembly relation nor other components are affected, and the valve rod of the acting valve is small in design difficulty, simple instructure, easy to machine and free of maintenance.

Description

technical field [0001] The invention relates to the field of action valves, in particular to an action valve stem. Background technique [0002] Action valves are mainly used in the field of safety assurance of hydraulic systems, which need to quickly complete the opening or closing action in a very short time (tens of milliseconds to several seconds). In some special fields, such as high-voltage substations, the action valves that control the operation of their circuit breakers not only require fast action speed (up to 10 milliseconds), but also require that the time of each action must be stable, so as to form a good match with the entire system and achieve The requirement that the total operating time of the system be controlled. [0003] Existing actuating valves usually adopt the method of shortening the movement stroke of the valve stem to achieve the purpose of rapid actuation. However, as the system flow demand increases, the diameter of the actuating valve must in...

AI Technical Summary

Problems solved by technology

Such a valve stem has a complex structure and is difficult to process, and the fluid flowing near the blades cannot completely form a vortex. Although the turbulent flow is greatly weakened, it still exists, so its action time is still not very stable.

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