Adjustable one-way throttling device

Abstract

The invention discloses an adjustable one-way throttling device, and belongs to the field of valves. According to the adjustable one-way throttling device, the throttling area of a channel can be adjusted in one direction. An oil-passing concave ring is arranged on the inner wall of a mounting through hole. A convex column body is provided with throttling oil holes, and the throttling oil holes penetrate through the outer wall of the convex column body to reach the inner wall of a cover plate through hole. When a valve element moves upwards to make contact with the bottom end face of the convex column body, pressure reducing oil holes, an oil-passing step, the oil-passing concave ring and the throttling oil holes are communicated to form a throttling channel. By adjusting the convex column body in the mounting through hole in a lifting mode, the area of the throttling channel can be adjusted, and therefore the flow of the throttling channel can be adjusted in one direction. In a gate system of a hydropower station, adjustment of the flow of hydraulic oil in gate closing operation can be achieved, the effect of adjusting the gate closing speed is achieved, and meanwhile, the flow of the hydraulic oil in gate opening operation cannot be affected; adjusting time can be effectively shortened, and the work efficiency is improved.

Description

technical field [0001] The invention relates to the field of valves, in particular to an adjustable one-way throttling device. Background technique [0002] The fast gates of water conservancy and hydropower inlets are generally operated by hydraulic hoists. When closing the door, the hydraulic hoist only needs a small power control power supply to open the outlet cartridge valve of the rod cavity, and the door can be closed under the action of its own weight and the outlet one-way throttling device, and the door can be closed only during the closing process. When the spool in the throttling device moves upward, the hydraulic oil can only flow through the base oil hole in the center of the spool, ensuring that the door closing speed will not be too fast; when the door is opened, the spool in the one-way throttling device Move in the opposite direction to open the peripheral decompression oil hole, and the hydraulic oil can flow through the base oil hole in the center of the...

AI Technical Summary

Problems solved by technology

However, once the current one-way throttling device is installed, the effective area of ​​the hydraulic oil channel cannot be adjusted when the door is closed, and the adjustment of the closing speed cannot be realized. If the closing speed needs to be adjusted, it is necessary to replace the valve with a different structure. It is very complicated to adjust the spool in the power station hoist and gate joint debugging, and all the hydraulic oil in the cylinder needs to be released during the replacement of the spool, which is not only time-consuming and laborious, but the leakage of hydraulic oil will also cause damage to the environment

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