A kind of balance valve and using method thereof

Abstract

The invention belongs to the technical field of pipeline valves, and relates to a balance valve and a use method thereof. The balance valve includes a valve body and a valve cover. A valve stem is arranged inside the valve cover. The valve stem includes an upper valve stem and a lower valve stem. Part I, the boss is provided with external thread part II, and the threads of external thread part I and external thread part II are equal in diameter; the lower valve stem includes a rod body, the top of the rod body is provided with a groove that matches the boss, and the top of the rod body There is an external thread part III on the outside; the external thread part II cooperates with the external thread part III to form the same thread part as the external thread part I; the upper valve stem is provided with a cavity I that runs through the upper end and the lower end, and the upper end of the lower valve stem is opened. There is a cavity II, the cavity I is provided with a regulating valve stem and the lower end of the regulating valve stem extends into the cavity II; the top of the regulating valve stem is provided with a mounting hole. With the present invention, after the valve opening degree of the balance valve is set, other personnel cannot change the opening degree at will.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, and in particular relates to a balance valve and a use method thereof. Background technique [0002] In some industries, due to the large pressure difference or flow difference of the medium (all kinds of flowable substances) in various parts of the pipeline or container, in order to reduce or balance the difference, between the corresponding pipelines or containers A valve is installed to adjust the relative balance of the pressure on both sides, or to achieve flow balance through the method of shunting. The valve is called a balance valve. The balance valve is a valve for dynamic and static balance adjustment under hydraulic conditions. Balance valves can be divided into three types: static balance valves, dynamic balance valves and differential pressure independent balance valves. At present, in the balance valve commonly used in the prior art, the valve stem is a whole, and there ar...

AI Technical Summary

Problems solved by technology

At present, in the balance valve commonly used in the prior art, the valve stem is a whole, and there are threads on the valve stem. Under the action of the handle, the valve stem can move up and down relative to the valve body to control the distance between the valve disc and the valve seat, thereby controlling The opening degree of the valve, but with this structure, when the staff set the valve opening degree, if other personnel touch the handle by mistake, the handle will drive the valve stem to move. Since the valve stem is a whole, the valve opening degree is easy change so that no balance can be achieved

Images