Twelve-square-shaft pin-free butterfly bamper

Abstract

The invention relates to a twelve-square-shaft pin-free butterfly valve. The twelve-square-shaft pin-free butterfly valve comprises a valve body, a valve plate, a valve rod and a valve seat; the valve seat is arranged on an inner circle of the valve body in a sleeving manner, the valve plate is rotationally fixed to the middle portion of the valve seat, a through hole is formed in the middle portion of the valve plate, the lower portion of the through hole is dodecagonal, and the valve rod penetrates the upper portion of the valve body and the through hole of the valve plate to be inserted into the lower portion of the valve body; a part, in contact with the dodecagonal lower portion of the through hole of the valve plate, of the valve rod is dodecagonal and can obtained the size through occlusion, a bottom end cover is arranged at the bottom of the valve body, two upper shaft sleeves are arranged between the upper portion of the valve body and the valve rod, and an OV sealing ring is arranged between the two upper shaft sleeves; and an oppositely-opened pressure plate is arranged at the top end of the valve body, the upper shaft sleeves are tightly pressed through the oppositely-opened pressure plate, the top end of the valve rod is square, and a driving device is connected to the top end of the valve rod. The valve rod and the valve plate of the twelve-square-shaft pin-free butterfly valve are connected in a pin-free manner, so that the center position of the valve plate is more accurate; and the top end of the valve rod is square, so that connection between the valve rod and the driving device of the valve is simple and reliable, and rotation is stable.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a twelve-axis pinless butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure. The flow of this type of fluid 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. [0003] The traditional butterfly valve stem is divided into upper and lower parts, and the valve stem and valve plate are connected by pins, so that the valve stem drives the valve plate to rotate. The valve stem and valve plate need to be machined with pin holes separately. The corresponding positions of the valve stem and valve plate are cylindrical, and it is not easy to align them during processing. If the pin holes of the valve st...

AI Technical Summary

Problems solved by technology

The valve stem and valve plate need to be machined with pin holes separately. The corresponding positions of the valve stem and valve plate are cylindrical, and it is not easy to align them during processing. If the pin holes of the valve stem and valve plate cannot be aligned, the installation of the valve will be affected, and even It leads to the scrapping of the valve stem and valve plate; and because the valve stem and valve plate rely on pins to drive, once the pin is damaged, the valve will lose its function, and the pin is subject to shear force, which is a vulnerable part

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