Angle throttle valve with valve rod directly screwed into valve rod nut for controlling ascending and descending of open-close piece

Abstract

The invention relates to an angle throttle valve in which a valve stem is directly screwed into a valve stem nut to control the lifting and lowering of an opening and closing member, and belongs to the technical field of mechanical design and manufacture. It includes a valve body, a tight cap, a bracket, a stem nut, a valve stem, a set screw, a valve core, a valve seat and a driving hand wheel, the external thread on the stem nut is connected with the internal thread on the upper end of the inner hole of the bracket, Set screws are fixed between the threaded parts; the external thread on the upper part of the valve stem is screwed into the internal thread of the valve stem nut, and the hand wheel is fixedly connected to the valve stem. In the present invention, the valve stem nut is fixed, and the valve stem is directly rotated up and down to change the flow area between the valve core and the valve seat, thereby achieving the purpose of throttling. Compared with the existing throttling valve, the present invention is not only small in volume, light in weight and less in material, but also saves the consumption of bearings and precious metal copper, and achieves the effect of reducing cost and increasing benefit.

Description

technical field [0001] The invention relates to an angle throttle valve in which a valve stem is directly screwed into a valve stem nut to control the lifting and lowering of an opening and closing member, and belongs to the technical field of mechanical design and manufacture. Background technique [0002] In the existing angle throttle valve, the lifting of the opening and closing parts is driven by the hand wheel to drive the valve stem nut to rotate, so that the spiral side space between the valve stem nut and the valve stem moves relative to each other, thereby realizing the valve core at the lower part of the valve stem. (Opening and closing parts) make up and down movements to change the flow area to achieve the purpose of flow control. Since there is relative motion between the bracket supporting the stem nut and the stem nut, rolling elements (bearings) must be provided between the two, so enough space must be left inside the bracket for the storage of the bearing, ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of large volume, many materials and high cost of the existing throttle valve, the present invention proposes an angle throttle valve in which the valve stem is directly screwed into the valve stem nut to control the lifting and lowering of the opening and closing parts. By changing the valve stem nut and the valve The active and passive movement forms of the screw pair between the rods realize the beneficial effects of small volume, light weight, material saving, labor saving and time saving of the throttle valve

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