An intelligent oil and gas recovery system for gas stations

Abstract

The present application relates to an intelligent oil and gas recovery system for gas stations, belonging to the field of oil and gas recovery at gas stations. The system comprises: a gas dispenser, a fuel tank, a fuel gun, and an oil and gas recovery pump; the gas dispenser is equipped with an oil inlet and an oil outlet; the fuel tank is equipped with a first oil pipe, which is connected to the oil inlet via the first oil pipe; the fuel gun is equipped with a second oil pipe, which is connected to the oil outlet via the second oil pipe; the oil and gas recovery pump is mounted on the second oil pipe; and further comprises: a liquid detection terminal, a gas detection terminal, a monitoring platform, and a drive control terminal; the liquid detection terminal is mounted on the first oil pipe; the gas detection terminal is mounted on the second oil pipe; the monitoring platform is connected to the gas detection terminal and the liquid detection terminal, respectively; the drive control terminal is connected to the monitoring platform and the control terminal of the oil and gas recovery pump, and the drive control terminal is used to control the rotation speed of the oil and gas recovery pump. The present application has the effect of improving the accuracy of oil and gas recovery.

Description

Technical Field

[0001] The present application relates to the field of oil and gas recovery at gas stations, and in particular to an intelligent oil and gas recovery system for gas stations. Background Art

[0002] With the rapid development of the economy and the rapid increase in car ownership, gasoline vapour emissions from gas stations have been identified as the most significant source of volatile organic compound (VOC) emissions. Therefore, implementing gasoline vapour recovery at gas stations is of great practical significance for environmental protection, safety, energy conservation and consumption reduction, and profit creation.

[0003] Existing oil and gas recovery work is mostly done manually. During the manual control process, due to personal experience deviations, the amount of oil and gas recovered by different staff members varies, resulting in large fluctuations in the gas-liquid ratio in the fuel dispenser, and even exceeding the safety requirements of the gas-liquid ratio in the fuel dispenser, posing a major safety hazard to the fuel dispenser. Summary of the Invention

[0004] The present application provides an intelligent oil and gas recovery system for gas stations, which has the characteristic of improving the accuracy of oil and gas recovery.

[0005] The intelligent oil and gas recovery system for gas stations provided in this application is realized through the following technical solutions:

[0006] An intelligent oil and gas recovery system for a gas station, comprising:

[0007] A fuel dispenser, equipped with a fuel inlet and a fuel outlet;

[0008] An oil tank is provided with a first oil pipe, and the oil tank is connected to the oil inlet through the first oil pipe;

[0009] an oil gun, configured with a second oil pipe, wherein the oil gun is connected to the oil outlet through the second oil pipe;

[0010] an oil and gas recovery pump, installed on the second oil pipe;

[0011] a liquid detection terminal, installed on the first oil pipe, for detecting the amount of oil transported in the first oil pipe and generating detected oil amount data;

[0012] a gas detection terminal, installed on the second oil pipeline, for detecting the amount of gas recovered in the second oil pipeline and generating detected gas data;

[0013] a monitoring platform, connected to the gas detection terminal and the liquid detection terminal, respectively, for calculating a target gas-liquid ratio of the fuel dispenser based on the detected oil volume data and the detected gas data, and outputting driving data when the target gas-liquid ratio exceeds a preset gas-liquid ratio range; and

[0014] The drive control terminal is connected to the monitoring platform and the control end of the oil and gas recovery pump, and is used to receive drive data to control the rotation speed of the oil and gas recovery pump.

[0015] By adopting the above technical solution, the monitoring platform can determine whether the target gas-liquid ratio in the fuel dispenser is within a preset gas-liquid ratio range based on the detection results of the liquid detection terminal and the gas detection terminal. When the calculated target gas-liquid ratio exceeds the preset gas-liquid ratio range, the monitoring platform outputs driving data to enable the driving control terminal to control the rotation speed of the oil and gas recovery pump. By changing the rotation speed of the oil and gas recovery pump, the gas-liquid ratio in the fuel dispenser is adjusted to ensure that the oil and gas and the oil volume in the fuel dispenser are in a balanced state. Therefore, the present application can recover excess oil and gas by adjusting the rotation speed of the oil and gas recovery pump while ensuring that the oil and gas and the oil volume in the fuel dispenser are in a balanced state, thereby improving the accuracy of the oil and gas recovery amount.

[0016] In a preferred example, the present application can be further configured as follows: the liquid detection terminal includes a flow meter and an encoder, the flow meter is connected to the encoder, and the encoder is used to obtain the amount of liquid passing through the flow meter and generate detection flow rate data.

[0017] In a preferred example, the present application may be further configured as follows: an oil quantity control terminal is further provided on the first oil pipe, and the oil quantity control terminal includes:

[0018] Gear pump, used to suck oil from the tank to the fuel dispenser;

[0019] A motor, wherein the power output end of the motor is connected to the control end of the gear pump, and is used to control the rotation speed of the gear pump; a motor regulator, connected to the monitoring platform, the encoder and the control end of the motor; the motor regulator is used to receive the ideal flow rate data output by the external input terminal; the motor regulator is used to verify whether the detected flow rate data is consistent with the ideal flow rate data; if they are consistent, the detected oil volume data is generated and uploaded to the monitoring platform; if not, the motor is adjusted to reach the corresponding rotation speed.

[0020] By adopting the above technical solution, users can input the ideal flow rate data through the external input terminal, and then the motor regulator drives the motor to rotate, and then the motor controls the gear pump to rotate, thereby automatically controlling the amount of oil transferred from the tank to the fuel dispenser.

[0021] In a preferred example, the present application can be further configured as follows: the oil gun is further configured with an opening and closing tool, and the opening and closing tool includes:

[0022] A base, wherein a connector is provided on the top of the base, and the connector is detachably connected to the oil gun; a mounting groove is machined in the base, and a through hole is opened on the side wall of the mounting groove toward the switch of the oil gun; and

[0023] A cylinder is installed in the installation groove, the piston rod of the cylinder is in contact with the switch of the oil gun through the through hole, and the control end of the cylinder is connected to the drive control terminal;

[0024] The drive control terminal is used to control the extension length of the piston rod of the cylinder.

[0025] By adopting the above technical solution, the drive control terminal can, under the control of the monitoring platform, control the cylinder's piston rod to extend to the desired length, causing the cylinder to gradually press against the fuel nozzle switch, thereby opening the fuel nozzle and controlling the flow rate of oil through the nozzle. Therefore, this application can achieve intelligent control of the fuel nozzle's opening and closing, thereby precisely controlling the amount of oil output from the fuel dispenser to the fuel nozzle.

[0026] In a preferred example, the present application can be further configured as follows: the base includes:

[0027] a bottom plate, wherein a side wall of the bottom plate is detachably connected to the cylinder;

[0028] A connecting plate, one end of which is fixedly connected to one end of the base plate, and the connecting plate and the cylinder are located on the same side of the base plate; and a support plate, which is arranged parallel to the base plate, one end of the support plate is fixedly connected to the other end of the connecting plate; the side wall of the support plate facing away from the base plate is fixedly connected to the connecting piece.

[0029] In a preferred example, the present application can be further configured as follows: the connecting member includes:

[0030] a first clamping plate and a second clamping plate symmetrically arranged on the support plate, a designated space being provided between the first clamping plate and the second clamping plate, and the oil gun being placed in the designated space; and

[0031] The abutting plate is slidably connected to the free end of the first clamping plate and the free end of the second clamping plate respectively.

[0032] By adopting the above technical solution, during installation, the oil gun is placed in the designated space, and then fixed between the first clamping plate and the second clamping plate by the abutment plate, that is, the oil gun can be flexibly installed.

[0033] In a preferred example, the present application can be further configured as follows: the gas detection terminal includes a Roots gas flowmeter and an electronic gas flowmeter connected in series in a loop.

[0034] By adopting the above technical solution, the amount of oil recovered in the oil and gas pipe is double-detected by using a Roots gas flowmeter and an electronic gas flowmeter, thereby improving the accuracy of the detection result.

[0035] In a preferred example, the present application can be further configured as follows: the drive control terminal includes:

[0036] A single-chip microcomputer is provided with a plurality of input pins and a plurality of output pins, wherein the single-chip microcomputer is connected to the monitoring platform via one input pin, is connected to the control terminal of the cylinder via one output pin, and is connected to the control terminal of the oil and gas recovery pump via another output pin; and

[0037] The relay is configured with an input end and an output end, wherein the input end is connected to an output pin of the single chip microcomputer, and the output end is connected to the control end of the cylinder, and is used to extend the working time of the cylinder.

[0038] In a preferred example, the present application may be further configured as follows: the monitoring platform is configured as follows:

[0039] Obtain data on the actual amount of fuel added in the fuel dispenser and the actual amount of gas recovered in the tank;

[0040] Calculate the actual gas-liquid ratio in the fuel dispenser based on the actual fuel increase data and the actual gas recovery data;

[0041] Acquire the detected gas data and the oil quantity detection data, and calculate the target gas-liquid ratio of the fuel dispenser based on the detected gas data and the oil quantity detection data;

[0042] Calculate the difference between the actual gas-liquid ratio and the target gas-liquid ratio;

[0043] When the difference between the actual gas-liquid ratio and the target gas-liquid ratio exceeds a preset difference threshold, early warning data is output.

[0044] By adopting the above technical solution, the monitoring platform can calculate the difference between the actual gas-liquid ratio and the target gas-liquid ratio, thereby performing an air tightness test on the oil and gas recovery circuit, thereby improving the practicality of this application.

[0045] In a preferred example, the present application may be further configured as follows: further comprising an early warning terminal, the early warning terminal being connected to the monitoring platform and configured to receive the early warning data and generate early warning prompt information.

[0046] In summary, this application includes at least one of the following beneficial technical effects:

[0047] 1. On the one hand, the present application can ensure that the oil vapor and oil volume in the fuel dispenser are in a balanced state, and recover excess oil vapor by adjusting the rotation speed of the oil vapor recovery pump, thereby improving the accuracy of the oil vapor recovery amount;

[0048] 2. On the other hand, the monitoring platform can calculate the difference between the actual gas-liquid ratio and the target gas-liquid ratio, thereby performing an air tightness test on the oil and gas recovery circuit to improve the practicality of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall structure of the intelligent oil and gas recovery system for gas stations provided in an embodiment of the present application.

[0050] Figure 2 This is a diagram of the intelligent oil and gas recovery system for a gas station provided in an embodiment of the present application.

[0051] Figure 3 This is a structural diagram of the oil quantity control terminal of the intelligent oil and gas recovery system for gas stations provided in an embodiment of the present application.

[0052] Figure 4 This is a structural diagram of the opening and closing tooling of the oil gun of the intelligent oil and gas recovery system for a gas station provided in an embodiment of the present application.

[0053] Explanation of the accompanying symbols: 1. Fuel dispenser; 2. Oil tank; 21. First oil pipe; 22. Oil and gas pipe; 3. Oil gun; 31. Second oil pipe; 32. Base; 321. Bottom plate; 322. Connecting plate; 323. Support plate; 33. Connecting piece; 331. First clamping plate; 332. Second clamping plate; 333. Clamping plate; 34. Cylinder; 4. Liquid detection terminal; 5. Oil quantity control terminal; 51. Base; 52. Gear pump; 53. Motor; 54. Motor regulator; 6. Oil and gas recovery pump; 7. Gas detection terminal; 8. Monitoring platform; 9. Drive control terminal; 10. Early warning terminal. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0055] This application provides a gas station oil and gas intelligent recovery system, referring to Figure 1 The system can be used to control the gas-liquid ratio in the fuel dispenser 1 when the fuel dispenser 1 is in operation, such as when the fuel dispenser 1 is refueling a vehicle, or when the oil tank 2 is refueling the fuel dispenser 1, so that the gas-liquid ratio in the fuel dispenser 1 meets safety requirements; it can also be used to test the air tightness of the oil and gas recovery circuit when the fuel dispenser 1 is not in operation.

[0056] Specifically, the intelligent oil and gas recovery system for gas stations includes a fuel dispenser 1, a fuel tank 2, and a fuel gun 3. The fuel dispenser 1 has an oil inlet at the top, and the fuel tank 2 has a refueling port. A first fuel pipe 21 is provided between the oil inlet and the refueling port, connecting the fuel dispenser 1 to the fuel tank 2 via the first fuel pipe 21. The fuel dispenser 1 has an oil outlet at the bottom, and a second fuel pipe 31 is provided at the fuel inlet of the fuel gun 3. The second fuel pipe 31 is connected to the fuel gun 3 via the second fuel pipe 31. The fuel dispenser 1 also connects to the fuel tank via the second fuel pipe 31 and the fuel and gas pipe 22.

[0057] Reference Figure 1 and Figure 2 The intelligent oil and gas recovery system for gas stations also includes a liquid detection terminal 4, an oil quantity control terminal 5, an oil and gas recovery pump 6, a gas detection terminal 7, a monitoring platform 8, a drive control terminal 9, and an early warning terminal 10. The fuel gun 3, the liquid detection terminal 4, the oil quantity control terminal 5, the oil and gas recovery pump 6, the gas detection terminal 7, the drive control terminal 9, and the early warning terminal 10 are all connected to the monitoring platform 8.

[0058] For ease of explanation, the intelligent oil and gas recovery system for gas stations is divided into two parts. The first part is the connection line between the oil tank 2 and the fuel dispenser 1. This line mainly includes the liquid detection terminal 4 and the oil quantity control terminal 5 installed on the first oil pipe 21. The first part is described as follows:

[0059] The liquid detection terminal 4 includes a flow meter and an encoder. The flow meter is connected to the encoder, and the encoder is used to obtain the amount of liquid passing through the flow meter and generate detection flow rate data.

[0060] Reference Figure 2 and Figure 4The fuel quantity control terminal 5 includes a base 51, a gear pump 52, a motor 53, and a motor 53 regulator mounted on the base 51. The base 51 is provided with threaded holes for screws. In practice, the screws and threaded holes allow the base 51 to be removably connected to a mounting surface, such as the floor, a bracket, or a wall within a gas station. The surface of the base 51 facing away from the mounting surface is fixedly connected to the gear pump 52. The gear pump 52 is connected to the first oil pipe 21. The end of the gear pump 52 facing away from the base 51 is connected to the motor 53, and the control terminal of the gear pump 52 is connected to the power output terminal of the motor 53. The motor 53 regulator is connected to the monitoring platform 8, an encoder, and the motor 53 control terminal. The motor 53 regulator can be a PLC chip or an STM32 chip. The motor 53 regulator is also connected to an external input terminal. In this embodiment, the external input terminal is used for the user to input desired flow rate data. The desired flow rate data is the amount of oil that needs to be transferred from the fuel tank 2 to the fuel dispenser 1 within a certain period of time to meet the user's requirements. The external input terminal calculates the ideal flow rate in the first oil pipe 21 according to time and oil volume, and then generates ideal flow rate data.

[0061] It should be noted that the ideal flow rate is the oil flow rate within the tolerance range of the first oil pipe 21. If the ideal flow rate exceeds the tolerance range of the first oil pipe 21, the external input terminal will prompt the user that the ideal flow rate data entered is not supported and requires re-entry until the ideal flow rate data is within the tolerance range of the first oil pipe 21. The external input terminal can be an electronic device such as a smartphone, smartwatch, or computer.

[0062] During the actual operation, the motor 53 regulator first obtains the ideal flow rate data from the external input terminal. Then, when the oil tank 2 replenishes the oil for the fuel dispenser 1, the encoder obtains the amount of liquid passing through the flow meter in real time and generates detection flow rate data. The motor 53 regulator obtains the detection flow rate data and verifies whether the detection flow rate data is consistent with the ideal flow rate data. If they are consistent, the detection oil volume data is generated and uploaded to the monitoring platform 8. Otherwise, the motor 53 regulator controls the motor 53 to reach the corresponding rotation speed. The corresponding rotation speed refers to the rotation speed of the motor 53 adjusted from the current rotation speed to the rotation speed that meets the ideal flow rate data, so that the entire process of transferring the oil in the oil tank 2 to the fuel dispenser 1 is within the user's settings, that is, meeting the user's desired transfer requirements. Therefore, the user can automatically refuel the fuel dispenser 1 through the liquid detection terminal 4. Since the liquid detection terminal 4 has the function of automatically adjusting the rotation speed, the liquid detection terminal 4 can accurately control the amount of oil flowing into the fuel dispenser 1.

[0063] Reference Figure 1 and Figure 2The second part of this embodiment is directed to the connection line between the fuel dispenser 1 and the fuel gun 3. This line mainly includes an oil and gas recovery pump 6 installed at the connection between the second oil pipe 31 and the oil and gas pipe 22, and a gas detection terminal 7 installed on the oil and gas pipe 22. The second part is described as follows:

[0064] Reference Figure 2 and Figure 4 Before proceeding to the second part, it is necessary to first understand the oil gun 3. In this embodiment, in order to automatically control the oil gun 3, the oil gun 3 is equipped with an opening and closing tool. The opening and closing tool includes a base 32 and a cylinder 34 arranged on the base 32. Specifically, the base 32 is composed of a bottom plate 321, a connecting plate 322 and a support plate 323. One side wall of the bottom plate 321 is fixedly connected to the cylinder 34, one end of the bottom plate 321 is fixedly connected to one end of the connecting plate 322, and the end of the connecting plate 322 away from the bottom plate 321 is fixedly connected to one end of the support plate 323. The bottom plate 321 and the support plate 323 are horizontal, and the bottom plate 321 and the support plate 323 are both located on one side of the connecting plate 322. The bottom plate 321, the connecting plate 322 and the support plate 323 form an inverted U-shaped structure. The space of the U-shaped structure is set as a mounting slot, and the cylinder 34 is located in the mounting slot. During installation, the bottom plate 321 is placed on the ground in the gas station, or a tripod is provided and the bottom plate 321 is installed on the tripod to increase the overall height of the base 32 and facilitate movement.

[0065] A connector 33 is provided on the side wall of the support plate 323 facing away from the base plate 321. Specifically, the connector 33 includes a first clamping plate 331, a second clamping plate 332, and a clamping plate 333. The first clamping plate 331 and the second clamping plate 332 are symmetrically arranged on the support plate 323. A designated space is provided between the first clamping plate 331 and the second clamping plate 332, and the oil gun 3 is placed in the designated space. The free ends of the first clamping plate 331 and the second clamping plate 332 are both provided with internal splines, and one end of the clamping plate 333 is provided with external splines. The external splines engage with the internal splines, so that the clamping plate 333 is slidably connected to the first clamping plate 331 and the second clamping plate 332, respectively. During installation, first place the oil gun 3 in the designated space, and then rotate the clamping plate 333 to fix the oil gun 3 between the first clamping plate 331 and the second clamping plate 332. A through hole is provided on the support plate 323 at a position corresponding to the switch of the oil gun 3 , and the piston rod of the cylinder 34 can contact the switch of the oil gun 3 through the through hole.

[0066] In order to automatically open and close the oil gun 3, the control end of the cylinder 34 is connected to the drive control terminal 9. The drive control terminal 9 is used to control the extension length of the piston rod of the cylinder 34 so that the piston rod gradually presses against the switch of the oil gun 3 or gradually releases the switch of the oil gun 3 to open or close the oil gun 3.

[0067] The working process of the drive control terminal 9 is also associated with the oil and gas recovery pump 6 and the gas detection terminal 7. Therefore, it is necessary to first explain the oil and gas recovery pump 6 and the gas detection terminal 7.

[0068] Reference Figure 1 The oil and gas recovery pump 6 is a vacuum pump, specifically a drag molecular pump or a turbomolecular pump. The gas detection terminal 7 comprises a combination of a Roots gas flowmeter and an electronic gas flowmeter, specifically, these are connected in series to the oil and gas pipe 22. This embodiment utilizes both a Roots gas flowmeter and an electronic gas flowmeter to achieve dual detection of the gas within the oil and gas pipe 22, thereby improving the detection accuracy of the gas detection terminal 7.

[0069] The drive control terminal 9 includes a single-chip microcomputer and a relay. The single-chip microcomputer is provided with a plurality of input pins and a plurality of output pins. In a specific example, the single-chip microcomputer is provided with a first input pin, a second input pin, a first output pin, and a second output pin. The single-chip microcomputer is connected to the monitoring platform 8 via the first input pin, and the single-chip microcomputer is connected to the external input terminal via the second input pin. The external input terminal and the external input terminal described in the first part of this embodiment can be the same device or two different devices, but both have the function of providing user input requirements, such as mobile phones, computers, smart watches and other electronic devices. The single-chip microcomputer is connected to the control terminal of the cylinder 34 via the first output pin to control the extension of the piston rod of the cylinder 34. The single-chip microcomputer is connected to the control end of the oil and gas recovery pump 6 via the second output pin.

[0070] In order to facilitate the drive control terminal 9 to control the cylinder 34 and the oil and gas recovery pump 6 to extend the working time, the first output pin and the second output pin of the single-chip microcomputer are both connected to relays, and the input ends of the two relays are both connected to the single-chip microcomputer. The output end of the relay connected to the first output pin is connected to the monitoring platform 8, and the output end of the relay connected to the second output pin is connected to the cylinder 34.

[0071] When fuel gun 3 is refueling a vehicle, the user enters the refueling amount data on the external input terminal. The refueling amount data refers to the amount of fuel the user needs to transfer from fuel dispenser 1 to the vehicle. After receiving the refueling amount data, the drive control terminal 9 extends the operating time of cylinder 34, causing the piston rod of cylinder 34 to gradually extend, thereby pressing against the switch of fuel gun 3, opening fuel gun 3 and refueling the vehicle. The relay then ensures that the amount of fuel flowing from fuel dispenser 1 into the vehicle is the same as the refueling amount entered by the user on the external input terminal.

[0072] The above is an explanation of two partial embodiments of the intelligent oil and gas recovery system for gas stations. The following is an introduction to the monitoring platform 8 to further illustrate this solution.

[0073] Reference Figure 2The monitoring platform 8 includes a memory and a processor. The memory can be used to store instructions, programs, codes, code sets, or instruction sets. The memory can include a program storage area and a data storage area. The program storage area can store instructions for implementing the operating system, instructions for at least one function, and instructions for calculating the gas-liquid ratio. The data storage area can store data involved in the calculation of the gas-liquid ratio.

[0074] The processor may include one or more processing cores. The processor executes the various functions of the present application and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory, calling data stored in the memory. The processor may be at least one of a special application integrated circuit, a digital signal processor, a digital signal processing device, a programmable logic device, a field programmable gate array, a central processing unit, a controller, a microcontroller, and a microprocessor. It is understood that for different devices, the electronic device used to implement the above-mentioned processor functions can also be other, and the embodiments of the present application are not specifically limited.

[0075] Monitoring platform 8 has two functions. First, it can monitor the gas-liquid ratio within fuel dispenser 1 while it is in operation. The process by which monitoring platform 8 monitors the gas-liquid ratio within fuel dispenser 1 is as follows: First, monitoring platform 8 pre-stores a preset gas-liquid ratio range. This preset gas-liquid ratio range must be based on the gas-liquid ratio currently recommended by safety authorities and consistent with fuel dispenser 1 safety. For example, the current safe gas-liquid ratio range within fuel dispenser 1 is 1.0-1.2. Therefore, in this embodiment, the preset gas-liquid ratio range can be set to 1.0-1.2. In other embodiments, the preset gas-liquid ratio range can also be other numerical ranges. Monitoring platform 8 then calculates the target gas-liquid ratio within fuel dispenser 1. This target gas-liquid ratio calculation process occurs in the following three scenarios: In the first scenario, when fuel tank 2 is refueling fuel dispenser 1, liquid detection terminal 4 detects the amount of oil being transported within first fuel pipe 21 in real time and generates detected oil volume data. The target gas-liquid ratio within fuel dispenser 1 is then calculated based on the remaining gas volume within fuel dispenser 1. The remaining gas volume within fuel dispenser 1 is the amount of gas directly obtained by monitoring platform 8 from the previous target gas-liquid ratio calculation. This is because the oil and gas recovery pump 6 is not turned on, so the gas amount in the fuel dispenser 1 has not changed. Therefore, the current remaining gas amount in the fuel dispenser 1 is the same as the gas amount in the previous calculation of the target gas-liquid ratio.

[0076] When the target gas-liquid ratio exceeds the preset gas-liquid ratio range, the monitoring platform 8 outputs the driving data; the driving control terminal 9 receives the driving data to open the oil and gas recovery pump 6, thereby starting to recover the oil and gas, to prevent the total gas volume entering from the oil tank 2 and the remaining gas volume in the fuel dispenser 1 from being unbalanced with the oil volume in the fuel dispenser 1, thereby causing the target gas-liquid ratio in the fuel dispenser 1 to exceed the preset gas-liquid ratio range, thereby ensuring that the gas-liquid ratio in the fuel dispenser 1 remains within the preset gas-liquid ratio range.

[0077] In the second scenario, when fuel dispenser 1 is refueling a vehicle, gas detection terminal 7 monitors the amount of gas recovered from fuel-gas pipe 22 in real time, generates gas detection data, and then calculates the target gas-liquid ratio within fuel dispenser 1 based on the remaining fuel level within fuel dispenser 1. The remaining fuel level within fuel dispenser 1 is data directly obtained from fuel dispenser 1 by monitoring platform 8. Currently, fuel dispenser 1 has flow monitoring capabilities, meaning it can determine its own remaining flow rate. The methods for monitoring the remaining flow rate within fuel dispenser 1 are well known to those skilled in the art and will not be discussed in detail here.

[0078] When the target gas-liquid ratio exceeds the preset gas-liquid ratio range, the monitoring platform 8 outputs drive data; the drive control terminal 9 receives the drive data and shuts down the oil and gas recovery pump 6, thereby stopping oil and gas recovery. If the amount of oil transferred from the fuel dispenser 1 to the vehicle gradually increases, causing the target gas-liquid ratio in the fuel dispenser 1 to exceed the preset gas-liquid ratio range again, the drive control terminal 9 will reopen the oil and gas recovery pump 6, bringing the target gas-liquid ratio in the fuel dispenser 1 back into the preset gas-liquid ratio range, thereby ensuring that the gas-liquid ratio in the fuel dispenser 1 remains within the preset gas-liquid ratio range.

[0079] In the third scenario, when oil tank 2 is refueling fuel dispenser 1 and fuel dispenser 1 is refueling a vehicle simultaneously, liquid detection terminal 4 detects the amount of oil transported within first fuel pipe 21 in real time and generates oil detection data. Simultaneously, gas detection terminal 7 detects the amount of gas recovered within fuel and gas pipe 22 in real time and generates gas detection data. Monitoring platform 8 then acquires the liquid and gas detection data and calculates the target gas-liquid ratio for fuel dispenser 1 based on these data. When the target gas-liquid ratio exceeds the preset gas-liquid ratio range, it outputs drive data. Finally, the dynamic control terminal receives the drive data to control the rotational speed of oil and gas recovery pump 6 to ensure that the gas-liquid ratio within fuel dispenser 1 remains within the preset gas-liquid ratio range.

[0080] The second function of the monitoring platform 8 is to test the air tightness of the oil and gas recovery circuit when the fuel dispenser 1 is not in operation. The process of the monitoring platform 8 to detect the air tightness of the oil and gas recovery circuit is as follows:

[0081] First, data on the actual amount of oil added to the fuel dispenser 1 and the actual amount of gas recovered in the fuel tank 2 are obtained. It should be noted that the actual amount of oil added can be calculated by calculating the remaining amount of oil in the fuel dispenser 1, while the actual amount of gas recovered in the fuel tank 2 can be detected by installing an independent vacuum pump on the fuel and gas pipe 22. This independent vacuum pump should be of exactly the same model and performance as the vacuum pump used in the fuel and gas recovery circuit to prevent discrepancies in the airtightness test results caused by variations in the detection accuracy of the two different vacuum pumps. The monitoring platform 8 can then detect the airtightness between the fuel tank 2 and the fuel dispenser 1 by controlling the rotational speed of the gear pump 52, that is, controlling the amount of oil entering the fuel dispenser 1. Alternatively, the monitoring platform 8 can control the drive control terminal 9 to activate the fuel and gas recovery pump 6 to detect the airtightness between the fuel dispenser 1 and the fuel nozzle 3. Alternatively, the monitoring platform 8 can simultaneously control the rotational speed of the gear pump 52 and control the drive control terminal 9 to activate the fuel and gas recovery pump 6 to detect the overall airtightness of the fuel and gas recovery circuit.

[0082] Specifically, to detect the overall air tightness of the oil and gas recovery circuit, it is first necessary to pre-set a preset difference threshold in the monitoring platform 8. Then, the user can choose to input the ideal flow rate data through the external input terminal or the monitoring platform 8. The motor 53 adjuster receives the ideal flow rate data and adjusts the rotation speed of the motor 53, thereby changing the rotation speed of the gear pump 52. The monitoring platform 8 synchronously controls the drive control terminal 9 to open the oil and gas recovery pump 6, and then calculates the target gas-liquid ratio in the fuel dispenser 1 in real time, and obtains the actual oil increase data in the fuel dispenser 1 and the actual gas recovery data in the oil tank 2, and calculates the actual gas-liquid ratio in the fuel dispenser 1. The difference between the actual gas-liquid ratio and the target gas-liquid ratio is calculated; if the difference between the two exceeds the preset difference threshold, the warning data is output. For example:

[0083] The motor 53 adjuster controls the speed of the gear pump 52 to simulate refueling at three flow rates: 15L / min, 30L / min, and 50L / min. Simultaneously, the oil and gas recovery pump 6, flow meter, and drive control terminal 9 in the system form a closed-loop regulation system to adjust the gas-liquid ratio from 0.8 to 1.1 or from 1.4 to 1.1. Finally, the monitoring platform 8 calculates the overall air tightness of the oil and gas recovery circuit based on the speed changes of the gear pump 52, flow meter, and oil and gas recovery pump 6. The results of simulating refueling at three flow rates: 15L / min, 30L / min, and 50L / min are shown below:

[0084]

[0085] It should be noted that, since data loss or data mutation may occur when the liquid detection terminal 4 and the gas detection terminal 7 respectively transmit data with the monitoring platform 8, a data preprocessing module is provided in the monitoring platform 8. The data preprocessing module can filter out incomplete data and mutated data, so that the processor only obtains normal data for calculation. The monitoring platform 8 also has a display interface. The monitoring platform 8 can display the difference between all calculated target gas-liquid ratios and the actual gas-liquid ratio, and mark the data in the display interface whose difference between the target gas-liquid ratio and the actual gas-liquid ratio exceeds the preset difference threshold in red, so that the user can intuitively see the test results.

[0086] In order to further prompt the user to know the test results, the early warning terminal 10 generates an early warning prompt message when it receives the early warning data. In this embodiment, the early warning terminal 10 can be a buzzer, a speaker or an indicator light. When the early warning terminal 10 is a buzzer, if the buzzer receives the early warning prompt message, the buzzer will beep, that is, the early warning prompt message is generated. When the user hears the beeping sound, the oil and gas recovery system needs to be inspected to ensure the air tightness of the oil and gas recovery system. When the early warning terminal 10 is a speaker, after receiving the early warning data, the speaker will broadcast through voice "The air tightness test failed, please pay attention to check the recovery circuit", that is, the voice broadcast is a early warning prompt message. When the early warning terminal 10 is an indicator light, after the indicator light receives the early warning data, it will prompt the user by flashing a special color (such as a flashing red light), that is, a production early warning prompt message.

[0087] To sum up, the intelligent oil and gas recovery system of the gas station can not only monitor the gas-liquid ratio in the gas pump 1 in real time when the gas pump 1 is in working condition, so as to control the gas-liquid ratio in the gas pump 1 to be kept within the safe gas-liquid ratio range; at the same time, the intelligent oil and gas recovery system of the gas station can also automatically control the oil and gas recovery circuit to perform air tightness testing when the gas pump 1 is not in working condition, so as to ensure the accuracy of oil and gas recovery by the intelligent oil and gas recovery system of the gas station.

[0088] The above description is merely an illustration of the preferred embodiments of the present application and the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the aforementioned disclosed concepts. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An intelligent oil and gas recovery system for a gas station, characterized in that: include: A fuel dispenser (1) is provided with a fuel inlet and a fuel outlet; An oil tank (2) is provided with a first oil pipe (21) and an oil and gas pipe (22), and the oil tank (2) is connected to the oil inlet via the first oil pipe (21); The oil gun (3) is provided with a second oil pipe (31), the oil gun (3) is connected to the oil outlet via the second oil pipe (31), the second oil pipe (31) is connected to the oil and gas pipe (22), and the fuel dispenser (1) is connected to the oil tank (2) via the second oil pipe (31) and the oil and gas pipe (22); an oil and gas recovery pump (6) installed at the connection between the second oil pipe (31) and the oil and gas pipe (22); a liquid detection terminal (4), installed on the first oil pipe (21), for detecting the amount of oil transported in the first oil pipe (21) and generating detection oil amount data; A gas detection terminal (7) is installed on the oil and gas pipe (22) and is used to detect the amount of gas recovered in the oil and gas pipe (22) and generate detection gas data; A monitoring platform (8) is connected to the gas detection terminal (7) and the liquid detection terminal (4), respectively, and is used to calculate the target gas-liquid ratio of the fuel dispenser (1) based on the detected oil volume data and the detected gas data, and output drive data when the target gas-liquid ratio exceeds a preset gas-liquid ratio range; as well as a drive control terminal (9) connected to the monitoring platform (8) and the control terminal of the oil and gas recovery pump (6), and used for receiving drive data to control the rotation speed of the oil and gas recovery pump (6); The liquid detection terminal (4) comprises a flow meter and an encoder, wherein the flow meter is connected to the encoder, and the encoder is used to obtain the amount of liquid passing through the flow meter and generate detection flow rate data; The first oil pipe (21) is further provided with an oil quantity control terminal (5), and the oil quantity control terminal (5) comprises: a gear pump (52) for sucking oil from the oil tank (2) into the fuel dispenser (1); a motor (53), wherein a power output end of the motor (53) is connected to a control end of the gear pump (52) for controlling the rotation speed of the gear pump (52); The motor (53) regulator is connected to the monitoring platform (8), the encoder and the control end of the motor (53); the motor (53) regulator is used to receive the ideal flow rate data output by the external input terminal; the motor (53) regulator is used to verify whether the detected flow rate data is consistent with the ideal flow rate data; if they are consistent, the detected oil quantity data is generated and uploaded to the monitoring platform (8); if not, the motor (53) is adjusted to reach a corresponding rotation speed.

2. The intelligent oil and gas recovery system for gas stations according to claim 1, characterized in that: The oil gun (3) is also equipped with an opening and closing tool, and the opening and closing tool comprises: A base (32), a connecting piece (33) is provided on the top of the base (32), and the connecting piece (33) is detachably connected to the oil gun (3); a mounting groove is machined in the base (32), and a through hole is opened on the side wall of the mounting groove toward the switch of the oil gun (3); and A cylinder (34) is installed in the installation groove, a piston rod of the cylinder (34) contacts the switch of the oil gun (3) through the through hole, and a control end of the cylinder (34) is connected to the drive control terminal (9); The drive control terminal (9) is used to control the extended length of the piston rod of the cylinder (34).

3. The intelligent oil and gas recovery system for gas stations according to claim 2 is characterized in that: The base (32) comprises: a bottom plate (321), wherein a side wall of the bottom plate (321) is detachably connected to the cylinder (34); a connecting plate (322), one end of which is fixedly connected to one end of the bottom plate (321), and the connecting plate (322) and the cylinder (34) are located on the same side of the bottom plate (321); and A support plate (323) is arranged parallel to the bottom plate (321), and one end of the support plate (323) is fixedly connected to the other end of the connecting plate (322); and a side wall of the support plate (323) facing away from the bottom plate (321) is fixedly connected to the connecting member (33).

4. The intelligent oil and gas recovery system for gas stations according to claim 3, characterized in that: The connecting member (33) comprises: a first clamping plate (331) and a second clamping plate (332) symmetrically arranged on the support plate (323), a designated space being provided between the first clamping plate (331) and the second clamping plate (332), and the oil gun (3) being placed in the designated space; and The clamping plate (333) is slidably connected to the free end of the first clamping plate (331) and the free end of the second clamping plate (332).

5. The intelligent oil and gas recovery system for gas stations according to claim 1, characterized in that: The gas detection terminal (7) comprises a Roots gas flowmeter and an electronic gas flowmeter connected in series on a loop.

6. The intelligent oil and gas recovery system for a gas station according to any one of claims 1 or 2, characterized in that: The drive control terminal (9) comprises: A single chip microcomputer is provided with a plurality of input pins and a plurality of output pins, wherein the single chip microcomputer is connected to a monitoring platform (8) via an input pin, is connected to a control end of a cylinder (34) via an output pin, and is connected to a control end of an oil and gas recovery pump (6) via another output pin; and The relay is provided with an input end and an output end, wherein the input end is connected to an output pin of the single chip computer, and the output end is connected to the control end of the cylinder (34) for extending the working time of the cylinder (34).

7. The intelligent oil and gas recovery system for gas stations according to claim 1, characterized in that: The monitoring platform (8) is configured as follows: Acquiring data on actual fuel addition volume in the fuel dispenser (1) and data on actual gas recovery volume in the fuel tank (2); Calculating the actual gas-liquid ratio in the fuel dispenser (1) based on the actual fuel increase amount data and the actual recovered gas amount data; Acquiring detection gas data and oil quantity detection data, and calculating a target gas-liquid ratio of the fuel dispenser (1) based on the detection gas data and the oil quantity detection data; Calculate the difference between the actual gas-liquid ratio and the target gas-liquid ratio; When the difference between the actual gas-liquid ratio and the target gas-liquid ratio exceeds a preset difference threshold, early warning data is output.

8. The intelligent oil and gas recovery system for gas stations according to claim 7, characterized in that: It also includes an early warning terminal (10), which is connected to the monitoring platform (8) and is used to receive the early warning data and generate early warning prompt information.

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