A gas-liquid ratio collector factory detection tool

Abstract

The utility model relates to gas -liquid ratio collection technical field discloses a kind of gas-liquid ratio collector factory detection tool. It aims at solving the technical problem that the factory detection of gas-liquid ratio collector in prior art mostly relies on oscilloscope, waveform generator and other instruments, and cannot simulate real application environment, detection result has limitedness, test process is relatively complex, time-consuming is relatively long. The utility model includes oil drum, oil extraction pipe, small refueling machine, oil-gas separator, oil filling pipe, gas pipeline, oil filling gun, filter, gas flowmeter, solenoid valve and vacuum pump are successively installed on gas pipeline along its inner gas flow direction. The utility model can simulate real application environment, carry out system test to gas-liquid ratio collector, so that gas-liquid ratio collector meets use requirement, test process is simple, easy to operate, and test efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid ratio acquisition technology, and in particular to a tooling for factory testing of a gas-liquid ratio acquisition device. Background Technology

[0002] When gas stations refuel, volatile organic compounds, mainly gasoline vapors, escape into the atmosphere, causing environmental pollution, resource waste, and safety hazards. The usual solution is to install a vapor recovery system. This system uses a vacuum pump to draw the vapors displaced from the fuel tank back to an underground storage tank while refueling. To ensure recovery efficiency and prevent system failure, the volume of recovered vapors must be maintained within a reasonable ratio to the volume of refueling gasoline. This ratio is called the vapor-liquid ratio. Therefore, environmental protection requires a device that can measure the vapor-liquid ratio of the fuel dispenser on-site and online for compliance monitoring.

[0003] Chinese patent document 201410381378.0 discloses a gas-liquid ratio control system for refueling gas recovery. The system implements closed-loop control of the gas-liquid ratio, measures the flow rate of recovered oil and gas through a gas flow meter, and uses this flow rate as the controlled object of the system. The control unit performs PID adjustment on the gas-liquid ratio deviation, and outputs a signal to control the frequency converter to adjust the speed of the vacuum pump so that the oil and gas flow rate returns to the given value required by the gas-liquid ratio. The system consists of a measurement unit, a setting unit, a control unit, an execution unit, a communication unit, and a display unit.

[0004] However, the above-mentioned solutions have at least the following technical problems during implementation: Gas-liquid ratio collectors are widely used in online monitoring systems for oil and gas recovery, but current factory testing of gas-liquid ratio collectors mostly relies on instruments such as oscilloscopes and waveform generators, which are tests under ideal conditions and cannot simulate real application environments, resulting in limited test results. Furthermore, the testing process is complex and time-consuming. Therefore, there is an urgent need to propose a factory testing fixture for gas-liquid ratio collectors. Summary of the Invention

[0005] In view of the above technical problems, this disclosure provides a factory testing fixture for a gas-liquid ratio collector, which solves the problem that in the existing technology, gas-liquid ratio collectors are widely used in online monitoring systems for oil and gas recovery, but current factory testing of gas-liquid ratio collectors mostly relies on instruments such as oscilloscopes and waveform generators, which are tests under ideal conditions and cannot simulate real application environments, resulting in limited test results. At the same time, the testing process is complex and time-consuming.

[0006] According to one aspect of this disclosure, a factory testing fixture for a gas-liquid ratio collector is provided, comprising an oil tank for containing test liquid, the oil tank being connected to a small fuel dispenser via an oil extraction pipe, an oil-gas separator being installed at the outlet end of the small fuel dispenser, one end of the outlet of the oil-gas separator being connected to a refueling pipe and the other end being connected to a gas pipeline, a refueling nozzle being installed at the oil outlet of the refueling pipe, and a filter, a gas flow meter, a solenoid valve, and a vacuum pump being sequentially installed along the gas flow direction on the gas pipeline; the oil quantity signal output end of the small fuel dispenser and the gas quantity signal output end of the gas flow meter being connected to the gas-liquid ratio collector, the control signal output end of the gas-liquid ratio collector being connected to the solenoid valve, and the gas-liquid ratio collector being connected to a display via a communication line for displaying oil quantity, gas quantity, and gas-liquid ratio.

[0007] In some embodiments of this disclosure, the refueling pipe is a double-layered nested internal air passage and an external oil passage.

[0008] In some embodiments of this disclosure, the top of the oil drum is provided with a sealing cap, the sealing cap is provided with an injection port and an exhaust valve, the bottom of the oil drum is provided with a drain pipe with a valve, and the side wall of the oil drum is provided with a liquid level observation window.

[0009] In some embodiments of this disclosure, the oil extraction pipe is provided with a regulating valve and a filter, the regulating valve being used to regulate the oil extraction flow rate.

[0010] In some embodiments of this disclosure, the small fuel dispenser is a gear pump or submersible pump; the oil-gas separator is a centrifugal or membrane separator.

[0011] In some embodiments of this disclosure, the outlet end of the small fuel dispenser is connected to two or more branches in parallel, and each branch is equipped with an oil-gas separator.

[0012] In some embodiments of this disclosure, a pipeline leak detection module is also included. The pipeline leak detection module includes multiple acoustic emission sensors spaced apart on the refueling pipe to convert stress wave signals generated when the pipeline leaks into electrical signals. The signal output terminals of the acoustic emission sensors are connected to a control unit via a signal amplifier. The control unit is located on the handle of the refueling nozzle. The control signal output terminal of the control unit is connected to an isolation valve, which is located in the oil circuit inside the refueling nozzle. The control unit is also connected to an alarm execution unit for issuing an alarm and shut-off signal when a leak is detected.

[0013] The beneficial effects of this utility model are as follows:

[0014] It can simulate real-world application environments to perform system testing on the gas-liquid ratio collector, ensuring it meets usage requirements; the testing process is simple and easy to learn. It also boasts high testing efficiency.

[0015] The device fully replicates the entire work chain from fuel delivery, small fuel dispensers, oil-gas separation, to refueling and oil-gas recovery. In this simulated environment, the gas-liquid ratio acquisition unit receives real fuel volume pulse signals and gas flow signals, performs calculations and controls, and its testing conditions are highly consistent with actual field applications. This greatly ensures the accuracy and reliability of factory test results, effectively avoiding the high rework costs incurred when problems are discovered after on-site installation.

[0016] The original large and complex gas station vapor recovery system has been condensed into a single experimental device. This allows manufacturers to conduct rapid and convenient standardized testing of each vapor-liquid ratio collector in their workshop before shipment, eliminating the need to transport it to an actual gas station for debugging. This significantly improves production efficiency and reduces testing costs.

[0017] The optional pipeline leak detection module represents a significant improvement in safety and functionality. It uses acoustic emission technology to monitor the integrity of the refueling hose in real time, immediately triggering an alarm and automatically shutting off the fuel supply should a leak occur during testing. This not only protects expensive testing equipment from oil contamination and damage but also ensures operator safety and prevents waste of test fluid and environmental pollution.

[0018] The design of the oil tank, including the liquid level observation window, sealing cap, vent valve, and bottom drain pipe, makes adding liquid, venting, and maintenance and cleaning very convenient, improving the ease of use and maintainability of the equipment.

[0019] By adjusting the valve, different flow conditions can be simulated, and the performance of the data collector at different refueling speeds can be tested.

[0020] It supports various types of small fuel dispensers and oil-gas separators, and even multiple branches in parallel, enabling the device to be adapted to and tested with data collectors suitable for different back-end equipment, thus having a wide range of applications. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the tooling structure for the factory testing of the gas-liquid ratio collector.

[0022] The components in the diagram are named as follows: 1. Test fluid; 2. Oil drum; 3. Oil extraction pipe; 4. Small fuel dispenser; 5. Oil-gas separator; 6. Fueling pipe; 7. Gas pipeline; 8. Fueling nozzle; 9. Filter; 10. Gas flow meter; 11. Solenoid valve; 12. Vacuum pump; 13. Gas-liquid ratio collector; 14. Display; 15. Internal gas path; 16. External oil path. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1

[0024] This example discloses a factory testing fixture for a gas-liquid ratio collector. (See also...) Figure 1

[0025] The system includes an oil drum 2 for containing test liquid 1, an oil drum 2 connected to a small fuel dispenser 4 via an oil extraction pipe 3, an oil-gas separator 5 installed at the outlet end of the small fuel dispenser 4, one end of the outlet of the oil-gas separator 5 connected to a refueling pipe 6 and the other end connected to a gas pipeline 7, a fuel nozzle 8 installed at the oil outlet of the refueling pipe 6, and a filter 9, a gas flow meter 10, a solenoid valve 11, and a vacuum pump 12 installed sequentially along the gas flow direction on the gas pipeline 7; the oil quantity signal output end of the small fuel dispenser 4 and the gas quantity signal output end of the gas flow meter 10 are connected to a gas-liquid ratio collector 13, the control signal output end of the gas-liquid ratio collector 13 is connected to the solenoid valve 11, and the gas-liquid ratio collector 13 is connected to a display 14 via a communication line to display the oil quantity, gas quantity, and gas-liquid ratio.

[0026] The refueling pipe 6 is a double-layered nested internal air passage 15 and external oil passage 16.

[0027] The top of the oil drum 2 is equipped with a sealing cap, which has an injection port and an exhaust valve. The bottom of the oil drum is equipped with a drain pipe with a valve, and the side wall of the oil drum is equipped with a liquid level observation window.

[0028] The oil extraction pipe 3 is equipped with a regulating valve and a filter. The regulating valve is used to adjust the oil extraction flow rate.

[0029] The small fuel dispenser 4 has a gear pump or submersible pump structure; the oil-gas separator has a centrifugal or membrane separation structure.

[0030] The outlet of the small fuel dispenser 4 has two or more parallel branches, and each branch is equipped with an oil-gas separator.

[0031] It also includes a pipeline leak detection module, which includes multiple acoustic emission sensors spaced apart on the refueling pipe to convert the stress wave signal generated when the pipeline leaks into an electrical signal. The signal output terminal of the acoustic emission sensor is connected to the control unit via a signal amplifier. The control unit is located on the handle of the refueling nozzle. The control signal output terminal of the control unit is connected to an isolation valve, which is located in the oil circuit inside the refueling nozzle. The control unit is also connected to an alarm execution unit, which is used to issue an alarm and shut off signal when a leak is detected.

[0032] During testing, connect the gas-liquid ratio data logger to the corresponding circuit. Use a communication testing tool on the monitor to test whether the communication function between the data logger and the monitor is normal. If the communication function is normal, click the refueling button on the small fuel dispenser to start refueling. Stop refueling when the amount of fuel added is greater than 15L. Observe the values ​​displayed on the test software on the monitor: fuel volume, gas volume, and gas-liquid ratio. A relative error of ≤1% for the fuel volume value and a gas-liquid ratio between 1.0 and 1.2 are considered qualified.

[0033] The measurement process is simple, the data results are easy to view, and the system can test the data acquisition, communication, and adjustment functions of the gas-liquid ratio data logger. It can perform electrical parameter testing, communication function testing, gas-liquid ratio detection, gas-liquid ratio adjustment, and address identification of the gas-liquid ratio data logger, realistically simulating actual application environments to ensure that the performance of the gas-liquid ratio data logger meets requirements.

[0034] During operation, open the filling port on the sealed cap at the top of the oil drum and inject an appropriate amount of test liquid into the drum, monitoring the liquid level through the observation window. After filling, close the filling port; if necessary, ensure pressure balance inside the drum through the vent valve. Start the small fuel dispenser and vacuum pump. The small fuel dispenser operates, drawing test liquid from the oil drum through the suction pipe. The regulating valve on the suction pipe can be used to set and change the simulated refueling flow rate. The test liquid is pumped into the oil-gas separator. Inside the separator, the gas drawn in or simulated is separated from the liquid. The separated pure test liquid enters the liquid outlet of the oil-gas separator and is delivered to the fuel nozzle via the external oil circuit of the fuel pipe. If multiple branches are connected in parallel, the liquid is diverted to different oil-gas separators for processing, simulating multi-nozzle refueling. The separated gas enters the gas outlet of the oil-gas separator and enters the gas pipeline. The vacuum pump provides suction to the gas pipeline, simulating the vacuum negative pressure environment of the oil-gas recovery system during refueling, causing the gas to flow forward. The gas first passes through a filter to remove any droplets or impurities, protecting the downstream gas flow meter. The purified gas flows through the gas flow meter, which measures the volumetric flow rate in real time and sends the gas volume signal to the gas-liquid ratio collector. While pumping liquid, the small fuel dispenser emits a pulse fuel volume signal proportional to the pumped volume and sends it to the gas-liquid ratio collector. The gas flow meter sends the detected gas flow signal to the gas-liquid ratio collector. Based on the received fuel and gas volume signals, the gas-liquid ratio collector calculates the current gas-liquid ratio in real time. The fuel volume, gas volume, and calculated gas-liquid ratio data are transmitted via a communication line to a display screen for real-time observation and recording by the operator. The gas-liquid ratio collector has a preset target gas-liquid ratio range (typically 1.0~1.2). It compares the calculated actual gas-liquid ratio with the target value. If the actual gas-liquid ratio deviates from the target range, the data acquisition unit sends a control signal to the solenoid valve. By adjusting the opening of the solenoid valve, the flow capacity of the gas pipeline is changed, thereby increasing or decreasing the amount of gas recovered from the oil and gas, ultimately stabilizing the actual gas-liquid ratio within the target range. This process simulates the data acquisition unit's control of the oil and gas recovery valve in a real system. The test liquid eventually flows out from the refueling nozzle and can be collected or recycled back to the oil tank through other means. When the test reaches the predetermined time or oil volume, the small refueling machine and vacuum pump are turned off, and one test process ends. Throughout the test, the pipeline leak detection module is constantly monitoring. If the refueling pipe ruptures or leaks, the stress wave generated at the leak point will propagate along the pipe wall. Multiple acoustic emission sensors installed at intervals will capture these stress wave signals and convert them into electrical signals. After being amplified by a signal amplifier, the electrical signals are transmitted to the control unit located on the refueling nozzle handle. The control unit analyzes and processes the signal. Once a leak signal is confirmed, it immediately performs two actions: sending a command to the alarm execution unit to trigger an audible and visual alarm to alert the operator. Send a shut-off signal to the isolation valve inside the refueling nozzle to immediately cut off the oil circuit and prevent the test fluid from continuously leaking out.After the test is completed, the drain valve at the bottom of the oil tank can be opened to drain the remaining test liquid in the tank for equipment maintenance or to replace the test liquid.

[0035] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0036] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A factory testing fixture for a gas-liquid ratio collector, characterized in that: The device includes an oil drum for containing the test liquid, which is connected to a small fuel dispenser via a suction pipe. An oil-gas separator is installed at the outlet of the small fuel dispenser. One end of the oil-gas separator's outlet is connected to a refueling pipe, and the other end is connected to a gas pipeline. A fuel nozzle is installed at the oil outlet of the refueling pipe. A filter, a gas flow meter, a solenoid valve, and a vacuum pump are sequentially installed along the gas flow direction on the gas pipeline. The oil quantity signal output of the small fuel dispenser and the gas quantity signal output of the gas flow meter are connected to a gas-liquid ratio collector. The control signal output of the gas-liquid ratio collector is connected to the solenoid valve. The gas-liquid ratio collector is connected to a display via a communication line to display the oil quantity, gas quantity, and gas-liquid ratio.

2. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: The refueling pipe has a double-layered nested internal air passage and an external oil passage.

3. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: The oil drum is equipped with a sealing cap on the top, with an injection port and an exhaust valve on the sealing cap. The oil drum is equipped with a drain pipe with a valve at the bottom, and a liquid level observation window is provided on the side wall of the oil drum.

4. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: The oil extraction pipe is equipped with a regulating valve and a filter, and the regulating valve is used to regulate the oil extraction flow rate.

5. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: The small fuel dispenser is a gear pump or submersible pump; the oil-gas separator is a centrifugal or membrane separator.

6. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: The outlet of the small fuel dispenser has two or more parallel branches, and each branch is equipped with an oil-gas separator.

7. The gas-liquid ratio collector factory testing fixture as described in claim 1, characterized in that: It also includes a pipeline leak detection module, which includes multiple acoustic emission sensors spaced apart on the refueling pipe to convert the stress wave signal generated when the pipeline leaks into an electrical signal. The signal output terminal of the acoustic emission sensor is connected to a control unit via a signal amplifier. The control unit is located on the handle of the refueling nozzle. The control signal output terminal of the control unit is connected to an isolation valve, which is located in the oil circuit inside the refueling nozzle. The control unit is also connected to an alarm execution unit, which is used to issue an alarm and shut-off signal when a leak is detected.

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