Petrochemical liquid storage tank air bag type floating block sampling device

Abstract

The invention discloses a petrochemical liquid storage tank air bag type floating block sampling device which comprises a vacuum tank, a nitrogen pressure tank, an air control box, a one-way valve, a sampling valve, an air bag type floating block, a pipe bundle and a floating disc anti-rotation rope, wherein the air control box comprises a pressure reducing valve, a sampling replacement control valve, a floating block control valve and a liquid level pressure gauge; the air bag type floating block is arranged on the floating disc anti-rotation rope; the vacuum tank, the sampling replacement control valve and the sampling valve are connected to form a sampling control circuit; the vacuum tank, the floating block control valve and the air bag opening are connected to form a floating block downward movement control circuit; the nitrogen pressure tank, the pressure reducing valve, the sampling replacement control valve, the one-way valve and the sampling valve are connected to form a residual replacement circuit; the nitrogen pressure tank, the floating block control valve and the air bag opening are connected to form a floating block upward movement control circuit. Up-and-down movement of the air bag type floating block is controlled by arranging the vacuum tank and the nitrogen pressure tank and operating the pneumatic valve to complete sampling of different liquid levels, and sampling is taken out by arranging the vacuum tank and the nitrogen pressure tank and operating the pneumatic valve.

Description

technical field [0001] The invention relates to the technical field of petrochemical equipment, in particular to an airbag-type float sampling device for petrochemical liquid storage tanks. Background technique [0002] Manual sampling of petrochemical liquid storage tanks requires a ladder to climb to the top of the tank. Generally, it takes 40 minutes for one tank, and the work efficiency is low. Corrosion may cause the risk of casualties caused by falling from high altitudes. There have been many painful lessons in the history of oil tank fires and explosions caused by sampling static electricity, which not only caused heavy losses to enterprises, but also caused unsafe accidents for personnel. [0003] With the improvement of sampling technology and equipment, various under-tank sampling devices are emerging, such as: buoy type under-tank sampler, float type under-tank sampler, folding arm type under-tank sampler, telescopic under-tank sampler , this situation has chan...

AI Technical Summary

Problems solved by technology

[0007] The invention provides an airbag type float sampling device for petrochemical liquid storage tanks, which solves the problems of safety, accuracy, reliability, service life and efficiency of sampling operations

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