A pipeline ball valve for crude oil transportation based on differential pressure extraction and exhaust siphon

Abstract

The invention discloses a pipeline ball valve for crude oil transportation based on differential pressure extraction and exhaustion by siphon. The mechanism is set on the upper end of the valve stem, the control hand wheel is meshed with the actuator, and the suction exhaust device is set inside the valve stem and connected through electric welding, and the lower end of the valve stem is connected through electric welding to the valve body. The present invention is equipped with a suction exhaust device, which can exhaust the crude oil remaining in the sphere and the gap between the sphere and the valve body when the ball valve is closed by means of differential pressure suction and siphon, so as to prevent the crude oil from being recovered after the temperature drops. It is viscous and sticks to the inner and outer walls of the sphere to ensure the diameter of the sphere's circulation, while ensuring the flexibility of the sphere's rotation, and can reduce the deviation of crude oil measurement.

Description

technical field [0001] The invention relates to the field of ball valves, more precisely, a pipeline ball valve for crude oil transportation based on differential pressure extraction and siphon exhaustion. Background technique [0002] Ball valve refers to the valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. The channels are connected and widely used in various fields. However, the pipeline ball valve of the prior art has the following defects: [0003] 1. The temperature of crude oil will rise during refining, and it has good fluidity. However, due to the structural characteristics of the ball valve, part of the crude oil will remain inside the ball and between the gaps when the flow is closed. As the temperature decreases, the crude oil becomes viscous. Sex, adhesion in the sphere reduces its pipe diameter, and the crude oil remaining in the gap will make the sphere difficult to rotate and reduce its c...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a pipeline ball valve for crude oil transportation based on differential pressure extraction and siphon exhaustion, so as to solve the problems of the ball valve in the prior art, because the temperature will rise during crude oil refining, which has better performance. However, due to the structural characteristics of the ball valve, part of the crude oil will remain inside the sphere and between the gaps when the flow is cut off. As the temperature decreases, the crude oil becomes viscous and adheres to the sphere to reduce its pipe diameter. At the same time The crude oil remaining in the gap will make the ball difficult to rotate and reduce its control flexibility; the flow of oil is usually counted, but due to the residual effect of the ball valve, the count has a certain deviation.

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