Double-ball double-seal ball valve with protective device

Abstract

The invention discloses a double-ball double-seal ball valve with a protection device, and belongs to the field of double-ball double-seal ball valves. When the joint of a ball valve body and a pipeline is collided, a stress dispersion layer disperses collision force to a buffer layer, so that the buffer layer is rapidly hardened, and the influence of the collision force is reduced; meanwhile, a carbon dioxide aqueous solution shakes, so that carbon dioxide gas overflows into a buffer cylinder and an expansion air bag, a piston and a moving rod are pushed to move, and an arc-shaped plate is tightly abutted against the buffer layer to relieve the collision force; the carbon dioxide gas enters the expansion air bag to drive the expansion air bag to expand and extrude an elastic magnetic insulation bag body to deform, so that magnetic insulation powder is dispersed, and the magnetic shielding state of a first magnet block is cancelled; a telescopic pipe is driven to move through the influence of like-pole repulsion between the first magnet block and a second magnet block, so that the repulsive force and the collision force are mutually offset; and under the extrusion effect of the collision force, buffer grease flows to promote the contact surface between the elastic buffer bag body and the ball valve body to be increased, so that the collision force is dispersed, and the protection performance is improved.

Description

technical field [0001] The invention relates to the field of double-ball double-seal ball valves, in particular to a double-ball double-seal ball valve with a protective device. Background technique [0002] The valve is a control component in the fluid conveying system, which has the functions of cut-off, regulation, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief, etc. The double-ball double-seal ball valve is a kind of valve, and its disc is spherical , The double-ball double-seal ball valve mainly drives the valve disc through the valve stem, and rotates around the ball valve axis to realize opening and closing. It is mainly used for cutting, distributing and changing the flow direction of the medium in the pipeline. It only needs to rotate 90 It can be closed tightly with high-speed operation and small rotational torque, and is widely used in petroleum refining, long-distance pipelines, chemical industry, paper...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when the double-ball double-seal ball valve is in use, when it is collided with the pipe connection, it lacks corresponding protective measures, which makes it prone to damage, affects its use, and greatly reduces its service life and efficiency.

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