An anti-tilt leakage breathing valve used by a tubing truck

Abstract

The invention belongs to the technical field of breathing valves, and in particular relates to an anti-tilt and leakage breathing valve used by oil pipe trucks. The structure composed of block, installation rod and installation base will be dumped, driving the frame body and sealing plate to swing, so that the second air hole opened on the sealing plate and the first air hole opened on the sealing cover are misplaced one by one, so that the installation The channel between the sleeve and the breather valve body is closed to prevent leakage; when the inclination angle of the oil tank is less than 20 degrees, the installation base is larger than the projected area of ​​the counterweight and the installation rod on the installation base, so it is equipped with The structure consisting of weights, mounting rods and mounting bases will not tip over. The present invention considers that it is not easy to reset the frame body and the mounting rod, and designs a reset mechanism to ensure the convenient reset of the mounting rod and the frame body.

Description

[0001] Technical field [0002] The invention belongs to the technical field of breathing valves, and in particular relates to an anti-tilt and leakage breathing valve used by oil pipe trucks. Background technique [0003] The breathing valve is composed of a pressure valve and a vacuum valve. It is installed on the vent pipe of the storage tank. It can automatically open and close with the change of the positive and negative pressure of the oil and gas in the storage tank, so as to keep the pressure difference between the inside and outside of the storage tank within the allowable range. [0004] The breathing valve is a safe and energy-saving product that maintains the air pressure balance of the storage tank and reduces the volatilization of the medium. The breathing valve makes full use of the pressure bearing capacity of the storage tank itself to reduce the discharge of the medium. The principle is to use the weight of the positive and negative pressure valve disc to cont...

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Problems solved by technology

[0005] When the oil tank is dumped, the breathing valve will leak because it cannot withstand the oil pressure, so the breathing valve needs to be sealed; the existing technology is to install a copper semicircular weight at the bottom of the valve. Under normal circumstances, the copper semicircular weight It is located at the bottom of the valve; when it is tipped, the weight will flip and seal the valve port under the action of weight; however, this technology is suitable for the situation where the oil tank is tipped over at a large angle, generally greater than 30 degrees; for small-angle tipping that occurs in reality Risks, such as when a fully loaded oil tanker goes up and down a slope or a side slope tipping angle is greater than 20 degrees but less than 30 degrees, and when a stationary oil-filled oil tank on the ground collapses after the ground collapses, the existing The anti-leakage technology cannot meet the anti-leakage requirements in this state, so it is necessary to design a breathing valve that can seal and not leak when tilted at a small angle

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