Automobile tank wagon top oil-loading oil-gas recovery sealing mechanism

Abstract

The invention relates to an oil gas recycling airtight mechanism applied to hydrocarbon liquid airtight entrucking, having force self-balancing function. On condition of no need of extra pressure provided by crane tube, able to realize excellent sealing at oil inlet of a tanker, effectively preventing oil gas leaking out.

Description

technical field [0001] The invention relates to a closed mechanism for recovering oil and gas during storage and transportation of petrochemical or chemical products. In particular, it is a closed mechanism for recovering oil and gas when the top is filled with a liquid hydrocarbon product tank car. Background technique [0002] Liquid hydrocarbon products (such as gasoline, aromatic hydrocarbons, solvent oil, etc.) usually have to go through several loading and unloading processes of trains or automobile tank cars from the factory to the end user. After filling these tank cars with liquid hydrocarbon products (hereinafter referred to as loading During the process of oil), a part of hydrocarbon gas (hereinafter referred to as oil gas) will be discharged from the tank car. The method of opening the oil filling port and letting the oil and gas generated during the oil filling process be discharged into the atmosphere is called open oil filling; the corresponding method is to ...

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Problems solved by technology

The downward force applied to the sealing mechanism by the outside world must not only meet the sealing requirements between the sealing mechanism and the oil filling port, but also overcome the considerable upward thrust generated by the gas pressure in the tank on the sealing mechanism, which greatly increases the pressure of the crane. Difficulty in the structure of the tube force application equipment and difficulty in operation by the operator

[0006] 2) Improper alignment causes poor sealing

When loading oil, the alignment between the crane pipe and the oil filling port is realized by the movement of the crane pipe or the tanker. Due to various reasons, the crane pipe is often not in the position of the vertical line of the oil filling port, but It is in a certain inclined state. At this time, the line seal formed between the sealing mechanism of the conical surface seal fixed on the oil filling pipe and the top edge of the oil filling port is not a real circle, resulting in poor sealing and leakage.

[0007] 3) The sealing material is difficult to choose properly

If the sealing material is too hard, it will be difficult to achieve a good seal with the oil filling port; if the sealing material is too soft, it will be easily damaged

[0008] Due to the above-mentioned defects in the airtight mechanism, although the current oil and gas recovery device itself has a high recovery efficiency, the actual amount of oil and gas recovered during the entire oil and gas recovery process is far below expectations, and a considerable part of the oil and gas leaks from the seal of the oil filling port to the atmosphere. middle

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