Non-pressure self-sealing oil vapor recovery oil gun

Abstract

The invention relates to a non-pressure self-sealing oil vapor recovery oil gun. The non-pressure self-sealing oil vapor recovery oil gun comprises a gun body, a handle assembly, a main valve, a self-sealing control valve, a gun barrel and an oil vapor recovery system. An auxiliary valve is installed between the gun body and the gun barrel, the self-sealing control valve comprises a self-sealing diaphragm, a self-sealing spring, a self-sealing valve body, a self-sealing valve deck and roller pins, and the self-sealing spring is installed in a self-sealing control cavity between the self-sealing diaphragm and the self-sealing valve deck; the roller pins are fixedly connected to the positions below the self-sealing diaphragm, and the self-sealing control cavity communicates with a negative pressure chamber at the auxiliary valve and an air suction port in the front end of the gun barrel through the self-sealing valve body and a through hole in the gun body; a non-pressure self-sealing device is arranged on the upper side of the self-sealing control valve mainly, when quantitative refueling is completed, an oil pump is shut down, no pressure exists in a non-pressure self-sealing cavity, a non-pressure self-sealing spring pushes the self-sealing valve deck to drive the roller pins to move upwards, the main valve is shut down, the non-pressure self-sealing function is achieved, oilloss and safety accidents caused by oil product leakage when the non-pressure self-sealing oil vapor recovery oil gun is started again are avoided, and the non-pressure self-sealing oil vapor recoveryoil gun has the advantages that using is reliable and safe.

Description

technical field [0001] The invention belongs to refueling equipment, in particular to an oil gas recovery refueling gun. The present invention is applicable to the refueling gun on the refueling machine of the gas station. Background technique [0002] The gas station of the refueling gun is the key equipment for refueling the vehicle. In order to leak the oil and gas during the refueling process, the refueling guns on the existing refueling machines all use oil and gas recovery self-styled refueling guns. For example, the patent No. CN201210596617.5 applied by our company is a high-performance self-styled refueling gun, including the gun body, handle assembly, main valve, control valve, oil outlet pipe and oil gas recovery system. In the oil inlet passage, a control mechanism is provided between the main valve and the control valve, and the front end of the oil outlet pipe is formed with a self-sealing hole, and the self-sealing hole communicates with the control membrane ...

AI Technical Summary

Problems solved by technology

However, during quantitative refueling, after the fuel dispenser is closed, the self-sealing hole is not blocked by oil, and the main valve continues to be in an open state. When taking out the refueling gun, it is necessary to manually close the main valve. The disadvantage is that it is easy to forget to close it when taking out the refueling gun. The main valve, when the fuel dispenser is turned on again, the oil will be sprayed directly from the fuel nozzle, causing oil loss and safety accidents

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