Sealing device of spherical valve

Abstract

The invention relates to the field of valves and particularly relates to a sealing device of a spherical valve. The sealing device of the spherical valve comprises a sphere body and a valve body, and is characterized by further comprising a metal sealing base between the sphere body and the valve body; vertical springs are arranged in the metal sealing base and the spring is fixed on the valve body; the metal sealing base is fixed on the valve body through a screw; and a plurality of the vertical springs are arranged. The sealing device of the spherical valve disclosed by the invention has the beneficial effects that the traditional sealing valve base is changed into an elastic sealing valve base; a closing moment is very small and is only 1 / 5-1 / 4 of an opening / closing moment of a traditional spherical valve with the same through diameter; the sealing device of the spherical valve is convenient to operate, is labor-saving and time-saving and does not easily scratch the sealing base; no matter whether medium pressure is high or low, or greatly fluctuates, the sealing can be ensured; the plurality of the springs are arranged so that the sealing effect is good and the sealing device of the spherical valve is applicable to the spherical valve with the DN which is more than 65mm; and the screw is used for firmly fixing the metal sealing base on the valve body.

Description

technical field [0001] The invention relates to the field of valves, in particular to a sealing device for a ball valve. [0002] Background technique [0003] The opening and closing torque of ordinary ball valve is large, and the sealing surface is easy to scratch. Therefore, the traditional sealing valve seat is changed to an elastic sealing valve seat. The opening and closing torque of the elastic sealing seat ball valve is very small, only 1 / 5~1 / 4 of the opening and closing torque of the traditional ball valve with the same diameter, easy to operate, labor-saving and time-saving. When the medium pressure is relatively high, the ball obtains the required sealing specific pressure under the action of the medium pressure. When the medium pressure is relatively low, under the double action of the medium pressure and the elastic force generated by the pre-compression of the spring, the ball also obtains the sealing specific pressure required for sealing, so no matter whet...

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