Online monitoring control system for oil gas recovery of gas station

Abstract

The utility model discloses a gas station oil gas recovery on-line monitoring control system which comprises vortex shedding flowmeters used for measuring oil gas recovery amount, proportional valves used for controlling oil gas speed and gas-liquid ratio controllers, and the number of the vortex shedding flowmeters, the number of the proportional valves and the number of the gas-liquid ratio controllers are given according to the number of oil filling guns. The vortex shedding flow meter has a Bluetooth broadcast function, the gas-liquid ratio controller receives Bluetooth broadcast content, the Bluetooth broadcast content comprises a serial number and cumulative flow of the vortex shedding flow meter, and the gas-liquid ratio controller binds the vortex shedding flow meter with the corresponding serial number according to the change of the cumulative flow in the Bluetooth broadcast. On the basis of original analog pulse signal transmission data, a Bluetooth communication function of the vortex shedding flowmeter and the gas-liquid ratio controller is added, and automatic binding is realized based on accumulated flow change, so that the gas-liquid ratio controller can conveniently acquire original data of the corresponding vortex shedding flowmeter, and the original data are used for fault analysis and preliminary diagnosis of faults.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas recovery in gas stations, and particularly relates to an on-line monitoring and control system for oil and gas recovery in gas stations. Background Technique

[0002] In order to reduce the emission of volatile organic compounds (VOCs) in gas stations, the national mandatory standard "Emission Standard of Atmospheric Pollutants for Gas Stations GB20952-2020" clearly requires gas stations to install an on-line monitoring system for oil and gas recovery to recover the gasoline volatile gas during the refueling process, which helps to reduce the release of harmful gases, thereby reducing environmental pollution and protecting air quality. With the mandatory implementation of the standard, the on-line monitoring and control system for oil and gas recovery has been popularized and implemented in gas stations. However, the on-line monitoring system often has situations such as gas-liquid ratio warning of the fuel nozzle, data being too high or too low, unstable state, and gas-liquid ratio alarm.

[0003] In the existing on-line monitoring system for oil and gas recovery, the vortex flowmeter, proportional valve, and gas-liquid ratio controller are mostly connected by wire. Coupled with the protection of the safety barrier, the output data of the flowmeter in the refueling machine recovery pipeline are all analog signals, resulting in the gas-liquid ratio controller being unable to know the flowmeter corresponding to the current cumulative flow, and thus unable to perform fault diagnosis based on the original data. When a fault occurs, it can only be manually eliminated on-site. As a result, when a fault occurs in the on-line monitoring and control system for oil and gas recovery in gas stations, due to its explosion-proof structure, the on-site maintenance work is relatively complex and the workload is large. Content of the Utility Model

[0004] In view of the above technical problems, the utility model proposes an on-line monitoring and control system for oil and gas recovery in gas stations. The vortex flowmeter and the gas-liquid ratio controller are connected by wireless Bluetooth and paired based on the change of the cumulative flow of the flowmeter, which is convenient for automatic fault diagnosis.

[0005] An on-line monitoring and control system for oil and gas recovery in gas stations includes a vortex flowmeter for measuring the oil and gas recovery volume, a proportional valve for controlling the oil and gas speed, and a gas-liquid ratio controller. The quantities of the vortex flowmeter, the proportional valve, and the gas-liquid ratio controller are given according to the number of fuel nozzles.

[0006] The vortex flowmeter has a Bluetooth broadcast function. The gas-liquid ratio controller receives the Bluetooth broadcast content, which includes the serial number and cumulative flow of the vortex flowmeter. The gas-liquid ratio controller binds the vortex flowmeter with the corresponding serial number according to the change of the cumulative flow in the Bluetooth broadcast.

[0007] When the gas-liquid ratio is abnormal, the gas-liquid ratio controller notifies the bound vortex flowmeter to upload the original data, and performs fault analysis based on the original data of the vortex flowmeter and the original data of the gas-liquid ratio controller.

[0008] Preferably, it further includes a data collector and a display terminal. The data collector is connected to the gas-liquid ratio controller and the display terminal either wired or wirelessly.

[0009] Preferably, the gas-liquid ratio controller uploads the vibration frequency, energy value detected by the vibration detection probe of the vortex flowmeter, and the frequency value and energy value detected by the flow detection probe through the data collector. If it exceeds the normal value range, it indicates that the vortex flowmeter vibrates too strongly.

[0010] Preferably, during the refueling process, when the gas-liquid ratio calculated by the gas-liquid ratio controller is less than or greater than the set threshold, the bound vortex flowmeter is required to upload its original data. When it is determined that the flow should not be zero but the original data is a straight line, it indicates that there is a hardware failure in the vortex flowmeter.

[0011] On the basis of the original analog pulse signal for data transmission, the utility model adds a Bluetooth communication function between the vortex flowmeter and the gas-liquid ratio controller, and realizes automatic binding based on the cumulative flow change, so as to facilitate the gas-liquid ratio controller to obtain the original data of the corresponding vortex flowmeter for fault analysis. The fault analysis logic is the same as the existing fault analysis logic, but the preliminary diagnosis of the fault can be realized by directly obtaining the original data, and most of the fault problems can be solved. Brief Description of the Drawings

[0012] Figure 1 It is a structural block diagram of an on-line monitoring and control system for oil and gas recovery in a gas station. Detailed Embodiments

[0013] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. The embodiments of the present utility model are given for the purpose of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and design various embodiments with various modifications suitable for specific purposes.

[0014] Embodiment 1

[0015] An on-line monitoring and control system for oil and gas recovery in a gas station, as Figure 1 shown, includes a vortex flowmeter for measuring the oil and gas recovery volume, a proportional valve for controlling the oil and gas speed, and a gas-liquid ratio controller. The quantities of the vortex flowmeter, the proportional valve, and the gas-liquid ratio controller are given according to the number of fuel dispensers.

[0016] The vortex flowmeter has a Bluetooth broadcast function, and the gas-liquid ratio controller receives the Bluetooth broadcast content, which includes the serial number and cumulative flow of the vortex flowmeter. The gas-liquid ratio controller binds the vortex flowmeter with the corresponding serial number according to the change of the cumulative flow in the Bluetooth broadcast.

[0017] When the gas-liquid ratio is abnormal, the gas-liquid ratio controller notifies the bound vortex flowmeter to upload the original data, and conducts fault analysis based on the original data of the vortex flowmeter and the original data of the gas-liquid ratio controller.

[0018] In summary, based on the original data transmission of analog pulse signals, this solution adds the Bluetooth communication function between the vortex flowmeter and the gas-liquid ratio controller, and realizes automatic binding based on the change of cumulative flow, so as to facilitate the gas-liquid ratio controller to obtain the original data of the corresponding vortex flowmeter for fault analysis. The fault analysis logic is the same as the existing fault analysis logic, but the initial diagnosis of faults can be realized by directly obtaining the original data, and most fault problems can be solved.

[0019] For example, the gas-liquid ratio controller uploads the vibration frequency, energy value detected by the vibration detection probe of the vortex flowmeter and the frequency value and energy value detected by the flow detection probe through the data collector. If it exceeds the normal value range, it indicates that the vortex flowmeter vibrates too strongly.

[0020] For another example, during the refueling process, when the gas-liquid ratio calculated by the gas-liquid ratio controller is less than or greater than the set threshold, the bound vortex flowmeter is required to upload its original data. If it is judged that the flow should not be zero but the original data is a straight line, it indicates that there is a hardware fault in the vortex flowmeter.

[0021] To more intuitively display relevant data and diagnosis results, the on-line monitoring and control system for oil and gas recovery in gas stations also includes a data collector and a display terminal. The data collector is connected to the gas-liquid ratio controller and the display terminal in a wired or wireless manner. The data collector is wirelessly connected to the display terminal, which is convenient for the placement of the display terminal and the reading of relevant data and diagnosis results. For example, the display terminal is set in the gas station monitoring room.

[0022] Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

Claims

1. An online monitoring and control system for oil and gas recovery at a gas station, comprising a vortex flowmeter for measuring the amount of oil and gas recovery, a proportional valve for controlling the oil and gas speed, and a gas-liquid ratio controller. The number of the vortex flowmeter, the proportional valve, and the gas-liquid ratio controller is given according to the number of fueling guns, and is characterized in that: The vortex flowmeter has a Bluetooth broadcast function, and the gas-liquid ratio controller receives the Bluetooth broadcast content, which includes the vortex flowmeter serial number and the cumulative flow rate. The gas-liquid ratio controller binds the vortex flowmeter with the corresponding serial number according to the cumulative flow rate change in the Bluetooth broadcast; When the gas-liquid ratio is abnormal, the gas-liquid ratio controller notifies the bound vortex flowmeter to upload original data, and performs fault analysis based on the original data of the vortex flowmeter and the original data of the gas-liquid ratio controller.

2. The online monitoring and control system for oil and gas recovery at a gas station according to claim 1 is characterized in that: It also includes a data collector and a display terminal. The data collector is connected to the gas-liquid ratio controller by wire or wireless, and is connected to the display terminal by wire or wireless.

3. The online monitoring and control system for oil and gas recovery at a gas station according to claim 2 is characterized in that: The gas-liquid ratio controller uploads the vibration frequency and energy value detected by the vibration detection probe of the vortex flowmeter and the frequency value and energy value detected by the flow detection probe through the data collector. If they exceed the normal value range, it means that the vibration of the vortex flowmeter is too strong.

4. The online monitoring and control system for oil and gas recovery at a gas station according to claim 1 is characterized in that: During the refueling process, when the gas-liquid ratio calculated by the gas-liquid ratio controller is less than the set threshold or greater than the set threshold, the bound vortex flowmeter is required to upload its original data. If the flow rate is judged to be not zero but the original data is a straight line, it indicates that the vortex flowmeter has a hardware failure.

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