A screw opening and closing two-way soft seal butterfly valve

Abstract

The invention discloses a bi-directional soft seal butterfly valve opened and closed through a screw. The butterfly valve comprises a hand wheel, a copper nut, the screw, a valve body bracket, a valve body, a valve body sealing seat, a valve plate sealing ring, a valve plate and valve shafts; when the valve plate is in a closed state, the plane, where the valve plate is positioned, and the screw are eccentric; a valve plate rocking handle is fixedly connected with the center of the valve plate; the screw and the valve plate rocking handle are connected through a pin shaft; the two valve shafts are respectively positioned on the two sides of the valve plate and form the angles alpha with the plane, where the valve plate is positioned when the valve plate is in the closed state; one valve shaft is positioned above the horizontal center axis of the valve plate; the other valve shaft is positioned below the horizontal center axis of the valve plate; and the eccentricity of the two valve shafts and the horizontal center axis of the valve plate in the closed state is b. The butterfly valve has the benefits as follows: the opening and closing are carried out through the screw, the opening and closing time is short, the opening and closing torque is less, and opening and closing are obvious; compared with worm gear case processing, the processing of the butterfly valve is simpler, the production cost is low, clamping during opening and closing does not occur and the valve plate can be opened fully.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a screw rod opening and closing bidirectional soft-seal butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline medium. A valve that is closed and closed, the valve 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. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. It is mainly composed of valve body, valve stem, butterfly plate and sealing ring. The valve body is cylindrical, with a short axial length and a built-in butterfly plate. T...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing butterfly valve is driven by a worm gear, the structure is complex, the production cost is high, the valve plate of the butterfly valve cannot be opened in place, the opening and closing time is slow, the opening and closing torque is large, and the opening and closing is not obvious, etc. This provides a screw opening and closing two-way soft-sealed butterfly valve with fast opening and closing time, small opening and closing torque, obvious opening and closing, simple processing and low production cost.

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