Large-caliber ultralow-temperature high-pressure metal sealing butterfly check valve

Abstract

The invention discloses a large-caliber ultralow-temperature high-pressure metal sealing butterfly check valve which comprises a main valve body, a first groove body and a valve element. A double-thread screw is arranged on the main valve body in a penetrating manner, the outer end of the double-thread screw penetrates through a first flange plate body to be in threaded connection with a nut, the first flange plate body is connected with a connecting pipe, the inner end of the connecting pipe makes contact with the main valve body, a rotating shaft is rotationally connected to the inner side wall of the main valve body, the upper end of the rotating shaft on the upper portion penetrates through the inner top end of the main valve body and is connected with a transmission shaft through a bevel gear set, the transmission shaft is connected with a motor, and the motor is arranged on the main valve body. According to the large-caliber ultralow-temperature high-pressure metal sealing butterfly check valve, when discharging is achieved through an auxiliary valve body, valve clacks on the two sides are pushed to rotate around a positioning shaft to be opened under the action of fluid, the fluid passes through the auxiliary valve body, when the fluid stops, the valve clacks on the two sides are closed smoothly under the action of a torsional spring, and backflow is avoided; and by means of a wear-resistant seat, wear between a limiting sleeve and a fixed seat is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of butterfly check valves, in particular to a large-diameter ultra-low temperature and high pressure metal-sealed butterfly check valve. Background technique [0002] The disc of the butterfly check valve is in the shape of a disc, which rotates around the shaft of the valve seat channel. Because the channel in the valve is streamlined, the flow resistance is smaller than that of the butterfly check valve, and it is suitable for large diameters where the flow does not change frequently. Occasions, but it is not suitable for pulsating flow, the valve port cannot be adjusted according to the flow rate requirement, and the impurities in the fluid cannot be filtered. The inside of the valve body is easily affected by the impurities in the fluid for a long time, and its wear degree will be accelerated. Now it is necessary A large-diameter ultra-low temperature and high pressure metal-sealed butterfly check valve ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large-diameter ultra-low temperature and high-pressure metal-sealed butterfly check valve to solve the problem that the valve port cannot be adjust...

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