Novel butterfly valve

Abstract

The invention discloses a novel butterfly valve, which comprises: a disc plate, a valve body and a valve stem. The valve stem passes through the top of the valve body and is vertically installed in the valve body. A water guiding bearing is arranged between the lower part of the valve stem and the valve body. A disc plate is installed in the middle of the valve stem. The disc plate is set in the flow channel. The disc plate includes a mounting cylinder and a convex body. The convex body is mounted on the mounting cylinder. The valve stem passes through the mounting cylinder, and the mounting cylinder is fixed on the valve stem. Above; the center line of the installation cylinder, the vertical center line of the convex body of the disc plate and the center line of the valve flow channel do not intersect, the valve seat is installed in the valve body, and the convex body and the valve seat are installed together to form a sealing surface; the inlet end of the valve body A sight glass is installed on the top. The technical purpose of the present invention is to provide a new type of butterfly valve with sight glass, higher reliability, smaller opening and closing torque, and more reliable sealing. Flow conditions, and can reduce the process of installing the mirror.

Description

technical field [0001] The invention relates to the field of valves, in particular to a novel butterfly valve. Background technique [0002] In the field of valves, butterfly valves are one of the most widely used valves. Butterfly valves 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. The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect, and adjust the medium in the pipeline. Excellent fluid control characteristics an...

AI Technical Summary

Problems solved by technology

[0004] The eccentric butterfly valve belongs to the torque seal. When the valve is switched on and off, the sealing structure is usually easy to wear and even get stuck, causing leakage or other safety accidents.

Moreover, the existing butterfly valve and the sight glass are installed separately in the pipeline system, so that there are many installation procedures when installing the sight glass and the ball valve, and the number of parts is increased, the cost of use is increased, and the reliability is reduced.

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