A method and system for preventing the gun from being lifted and judging the sealing state of the refueling device

Abstract

The present invention relates to a method for preventing words from lifting a gun and judging the sealing state of a refueling device. The first step is to send a first signal to an encoder when the gun is lifted, so that the encoder sends a first pulse signal and receives the first pulse signal; The second step is to preset the pre-fueling period, and judge whether the pre-fueling is over according to the state of the first pulse signal received during the pre-fueling period. When it is judged that the pre-fueling is over, send a second signal to the encoder to make the encoder start sending The second pulse signal; the third step is to perform billing according to the second pulse signal; wherein, according to the state of the first pulse signal received during the pre-fuel period, determining whether the pre-fuel is over includes, if the first pulse signal is not received, Then it is judged as the end of pre-fueling, if the received first pulse signal changes from presence to non-existence, then it is judged as the end of pre-fueling, the present invention can prevent the occurrence of the problem of raising the gun and jumping characters and determine the sealing state of the refueling device.

Description

Technical field [0001] The present invention belongs to the technical field of refueling equipment, more particularly, relates to a method and system to prevent the gun from being lifted and the sealing state of the refueling device. Background [0002] When refueling at the gas station, after lifting the gun, before the oil gun is put into the customer's fuel tank, the oil pump will run to the fuel pipe to press, if the pressure in the fuel pipe is insufficient, there is an oil input in the gas pipe, which will cause the encoder to rotate and output the pulse, and the metering processor will convert the amount of oil into the amount of oil and send it to the monitoring display data after the pulse, and the phenomenon of displaying transaction data on the screen is displayed, that is, the jump word for the gun. Because of the strict explosion-proof requirements, the fuel dispenser metering part encoder must be placed in the front end of the explosion-proof area, and can not be pl...

AI Technical Summary

Problems solved by technology

Due to the strict explosion-proof requirements, the encoder of the metering part of the fuel dispenser must be placed in the explosion-proof area of ​​the front end, and cannot be placed at the position of the refueling gun at the terminal. The pressure between the refueling guns gradually loses, which leads to the jumping of the gun when the gun is raised next time. In order to solve the problem of the jumping of the gun, in the prior art, the refueling machine will set a pre-refueling pressure time to reduce the oil pressure in the refueling pipe. To the normal pressure, this technology cannot accurately set the pre-refueling time, artificial setting is easy to lead to cheating, and if the oil leakage of the refueling device (such as refueling pipe, refueling gun, etc.) cannot be found in time, it will cause economic losses

[0003] In order to solve the problem that the tanker lifts the gun and jumps the word, and the abnormal sealing state of the fueling device cannot be detected in time, there is an urgent need for a method and system for preventing the gun from lifting the gun and detecting oil leakage of the fueling equipment

Images