Vacuum pressure valve for oil storage tank of gas station

Abstract

The invention discloses a vacuum pressure valve for an oil storage tank of a gas station. According to the main points of the technical scheme, the vacuum pressure valve comprises a vacuum pressure valve shell, a disc cap and a fixing sleeve, wherein the disc cap and the fixing sleeve are located at the upper side and the lower side of the vacuum pressure valve shell; a fixing support and a shell notch matched with the fixing support are arranged in the vacuum pressure valve shell; a pressure adjusting plate capable of sliding up and down is arranged in the fixing support in a penetrating manner; a plurality of ventilation notches are formed in the side surface of the fixing support; the outer side of the fixing support is covered with a first filter screen structure matched with the fixing support; an adjusting groove is formed in the bottom of the pressure adjusting plate; an adjusting rod sliding up and down is arranged in the adjusting groove in a penetrating manner, and the lower end of the adjusting rod is fixedly connected with an adjusting piston; a plurality of adjusting through holes are further formed in the adjusting groove; and the upper side of the adjusting rod is sleeved with an elastic support matched with the pressure adjusting plate. The vacuum pressure valve has the advantages of being simple in structure, stable in tank pressure and high in reliability, effectively filters impurities in air and avoids the influence on oil quality.

Description

technical field [0001] The invention relates to the technical field of petrochemical equipment, in particular to a vacuum pressure valve for oil storage tanks in gas stations. Background technique [0002] Vacuum pressure valve, that is, vacuum pressure release valve, is a protective device used on the top of powder storage bins in industries such as thermal power generation, building materials, metallurgy, and chemical industry. Protects silos from excessive positive and negative pressures during inflation and degassing and abnormal temperature changes. [0003] The vacuum pressure valve for the oil storage tank of the gas station oil depot consists of two parts: a pressure valve and a vacuum valve. Installed at a height of about 4.5 meters from the vent pipe of the oil storage tank, its function is to maintain the tightness of the oil tank under normal circumstances and reduce the evaporation loss of oil products to a certain extent. And when necessary, it can automatica...

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Problems solved by technology

[0006] Although this patent can maintain a certain tank pressure to reduce the volatilization of oil and gas, the vacuum pressure valve opens when the internal pressure of the oil storage tank is lower than the external pressure, and the inner and outer sides are directly connected, so that dust particles enter the oil storage tank with the external air, affecting the storage capacity. The quality of refined oil in the oil tank

At the same time, the existing vacuum pressure valve has the problem of low sensitivity, which makes it impossible to quickly recover the pressure in the tank when the pressure in the tank is abnormal, which in turn affects the quality of the oil in the tank

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