(1) Manhole. Horizontal buried oil tank or repair oil tank personnel in and out, ventilation and exhaust, its diameter is about 700mm, usually installed on the manhole cover plate of oil hole, ventilation pipe and in and out of the oil pipeline and other oil tank accessories, no manhole operation and protection above the manhole.

(2) Measure the oil hole. Used for measurement, sampling and observation. A special oil groove made of aluminum alloy is provided to prevent sparks when the ruler is down. A sealing groove is provided under the hole cover and an oil-resistant rubber gasket is embedded to seal and prevent cremation due to impact when the hole cover is closed. There are also some oil holes in the form of steel pipe sleeve copper cap (cover), mainly with the weight of the copper cover and gasket seal.

(3) air vent (breathing tube). It is used for air inhalation when oil is connected and unloaded from the tank and oil vapor is discharged from the tank.

(4) Air blocking breathable cap. It is the auxiliary equipment of the oil tank of the gas station, mounted on the top of the tank ventilation. When the oil in the tank is heated and expanded or unloaded, it breathes outwardly through the fire-resistant grain plate. When the tank to transport oil products, through the corrugated plate to inhale air, and prevent fire from passing through, to ensure the safety of the tank.

(5) and door bottom valve. Also known as check valve or check valve, installed in the oil tank outlet pipe mouth, from the tank bottom should not be less than 0.15mm to prevent oil in the tanker does not suck oil from the pipeline and tanker back to the tank.

(6) Quick connector. The automobile must use closed unloading mode, unloading tubing and oil inlet connection, using quick sealing joint. Quick connectors are hose connectors at both ends of Yin and Yang. The oil is unloaded from the tank car into the tank through the quick joint of the unloading pipe. This joint is easy to operate, quick to assemble and disassemble, reliable to work, can reduce oil and gas play, reduce air pollution, is conducive to safety. CRJ type plug-in hose joint assembly commonly used in gas stations.

(7) Emergency cut-off valve. It is a safety valve used with submersible oil pump and installed on the bottom pipeline of the gas station.

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