Detection equipment suitable for gas-liquid ratio of oil gas recovery system of gas station

Abstract

The utility model discloses gas-liquid ratio detection equipment suitable for an oil gas recovery system of a gas station, and relates to the technical field of gas-liquid ratio detection of oil gas recovery systems, and the gas-liquid ratio detection equipment comprises a first three-way pipe, a first detection valve and a movable gas flow detector. And the first three-way pipe is arranged on a recovery header pipe of the oil gas recovery system. A first port of the first detection valve is connected with the first three-way pipe, and a second port of the first detection valve is connected with the movable gas flow detector. The movable gas flow detector comprises a gas flow meter, a connector and two connecting pipes. And two ports of the gas flowmeter are respectively connected with the two connecting pipes through connectors. The ends, away from the gas flow meter, of the two connecting pipes are connected with the first detection valve and a detection valve of the oil gas recovery system respectively. Compared with a traditional method for judging the operation state of the oil gas recovery equipment by relying on representation, the equipment can provide a more accurate and more reliable monitoring result.

Description

Technical Field

[0001] The present application relates to the technical field of gas-liquid ratio detection of oil and gas recovery systems, and in particular to a gas-liquid ratio detection device suitable for use in oil and gas recovery systems at gas stations. Background Art

[0002] In the gas station sector, the effective operation of oil and gas recovery systems is crucial for reducing oil and gas emissions and protecting the environment. However, some gas stations currently lack online oil and gas recovery detection systems. Their routine inspections and maintenance rely primarily on superficial checks, such as whether the oil and gas recovery pipelines are leaking and whether the oil and gas recovery vacuum pumps are operating. However, they are unable to conduct detailed monitoring of critical issues such as oil and gas recovery pipeline blockages and abnormal gas-to-liquid ratios. Oil and gas recovery pipeline blockages and abnormal gas-to-liquid ratios not only lead to frequent equipment failures but also cause oil and gas concentrations to exceed standards, posing a significant risk to the safe operation of gas stations. To address these issues, although oil and gas recovery self-test equipment is available on the market, these products are expensive and complex to operate, making them difficult to widely use in gas stations. Summary of the Invention

[0003] The present application provides a gas-liquid ratio detection device suitable for the oil and gas recovery system of a gas station, aiming to solve the problem that blockage of the oil and gas recovery pipeline and abnormal gas-liquid ratio cannot be monitored in detail by judging by appearance.

[0004] In a first aspect, the present application provides a device for detecting the gas-liquid ratio of an oil and gas recovery system at a gas station, the device comprising: a mobile gas flow detector, a first three-way pipe, and a first detection valve;

[0005] The first tee pipe is arranged on the recovery main pipe of the oil and gas recovery system;

[0006] The first port of the first detection valve is connected to the first three-way pipe, and the second port of the detection valve is connected to the mobile gas flow detector;

[0007] The mobile gas flow detector includes a gas flow meter, a connector and two connecting pipes;

[0008] The two ports of the gas flow meter are respectively connected to the two connecting pipes through the connectors;

[0009] One end of the two connecting pipes away from the gas flow meter is connected to the first detection valve and the detection valve of the oil and gas recovery system respectively.

[0010] Optionally, the connector includes a first quick connector and a second quick connector;

[0011] The first quick connector is assembled on the gas flow meter, the second quick connector is assembled on the connecting pipe, and both ends of the connecting pipe are assembled with the second quick connector;

[0012] The first quick connector and the second quick connector match each other.

[0013] Optionally, a port of the first detection valve away from the first three-way pipe is equipped with an adapter, and the adapter matches the second quick connector.

[0014] Optionally, the first detection valve is provided with a first plug matching the adapter.

[0015] Optionally, the mobile gas flow detector further includes two second plugs, and the second plugs match the second quick connectors.

[0016] Optionally, the connecting pipe is configured as a hose.

[0017] Optionally, a conductive wire is provided on the inner wall of the connecting pipe, and the conductive wire is connected to the connector on the port of the connecting pipe.

[0018] Optionally, the conductive wire is made of copper.

[0019] Beneficial effects:

[0020] The detection equipment provided by the present application can detect the gas-liquid ratio data of the oil and gas recovery system of a gas station in real time. Compared with the traditional method of relying on appearances to judge the operating status of the oil and gas recovery equipment, the present equipment can provide more accurate and reliable monitoring results. The existing oil and gas recovery self-test equipment on the market is expensive and complicated to operate, while the detection equipment provided by the present application has achieved cost reduction through the optimization of materials and perfect design, making it possible for gas stations to be equipped with such equipment more economically and easy to popularize and apply in the industry. By monitoring the gas-liquid ratio data in real time, gas stations can promptly detect faults in the oil and gas recovery system, such as blockage of the oil and gas recovery pipeline, abnormal gas-liquid ratio, etc., so as to carry out timely repairs and maintenance, avoid frequent equipment failures and excessive oil and gas concentrations, and ensure the safe operation of gas stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1This is a schematic diagram of the connection of a gas-liquid ratio detection device in a gas station gas recovery system, as proposed in one embodiment of the present application;

[0023] Figure 2 This is a structural diagram of a mobile gas flow detector proposed in one embodiment of the present application;

[0024] Explanation of the reference numerals: mobile gas flow detector 1 , first three-way pipe 2 , first detection valve 3 , gas flow meter 11 , connecting pipe 12 , first quick connector 13 , second quick connector 14 , second plug 15 , conductive wire 16 . DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. 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.

[0026] like Figure 1 As shown, the existing oil and gas recovery system consists of a gas collection hood, a vacuum pump, and a tee pipe connected in sequence. The tee pipe is then connected to a recovery main pipe, which is then connected to the oil tank. The recovery main pipe is also connected to another tee pipe and a test valve for daily maintenance.

[0027] The vapor hood is a component of a gas station's vapor recovery system, its primary function being to collect and direct vapors. During refueling, the nozzle generates a certain amount of vapor. If not recovered and treated, this vapor would be released directly into the atmosphere, causing environmental pollution. The unique design of the vapor hood effectively captures the vapors generated during refueling and directs them into the vapor recovery system for subsequent treatment and recovery. This reduces air pollution and improves resource utilization. The vacuum pump primarily provides the necessary vacuum during the vapor recovery process, ensuring that vapors are smoothly drawn from the nozzle's vapor hood into the vapor recovery system. Through the vacuum pump, gas stations can effectively recover and treat vapors volatilized during refueling, preventing them from being released directly into the atmosphere and thus reducing environmental pollution. The recovery manifold connects the vacuum pump to the oil tank, which stores the vapors. The test valve is used for routine maintenance.

[0028] like Figure 1 and Figure 2As shown, a device for detecting the gas-liquid ratio in a gas station's oil vapor recovery system comprises a mobile gas flow detector 1, a first three-way pipe 2, and a first detection valve 3. The first three-way pipe 2 is mounted on the main recovery pipe of the oil vapor recovery system. The first port of the first detection valve 3 is connected to the first three-way pipe 2, and the second port of the detection valve is connected to the mobile gas flow detector 1.

[0029] In this embodiment, the first three-way pipe 2 is installed on the main recovery pipe. It serves as a connection point, connecting to the existing oil and gas recovery system main recovery pipe on the one hand and to other components of the testing equipment (such as the first test valve 3) on the other. Through this connection, the first three-way pipe 2 enables effective communication between the oil and gas recovery system and the testing equipment. Furthermore, the first three-way pipe 2 serves as a flow diversion mechanism. During the testing process, it allows oil and gas to flow freely between the main recovery pipe and the testing equipment, thereby accurately detecting the gas-to-liquid ratio of the oil and gas recovery system. This diversion function not only ensures the smooth progress of the testing process but also ensures that the normal operation of the oil and gas recovery system is not affected. The first test valve 3 connects and disconnects the airflow between the oil and gas recovery system and the testing equipment. By operating the first test valve 3, the flow of oil and gas between the main recovery pipe and the testing equipment can be flexibly controlled, facilitating gas-to-liquid ratio testing. During the testing process, the first test valve 3 is connected to the testing equipment, and by monitoring the oil and gas flow through the valve, the operating status of the oil and gas recovery system can be determined. If the detection data is abnormal, the data from different fuel dispensers or different return air pipelines can be compared to analyze whether the problem is a failure of the oil and gas recovery vacuum pump or abnormal liquid resistance in the oil and gas recovery pipeline, providing a basis for subsequent repairs and maintenance.

[0030] Specifically, the mobile gas flow detector 1 includes a gas flow meter 11, a connector, and two connecting pipes 12. The two ports of the gas flow meter 11 are connected to the two connecting pipes 12 via the connector. The ends of the two connecting pipes 12, away from the gas flow meter 11, are connected to the first detection valve 3 and the detection valve of the oil and gas recovery system, respectively.

[0031] The gas flowmeter 11 is used to measure and record the gas flow through the oil and gas recovery system, also known as the return gas volume. By comparing this with the fuel dispenser's refueling volume, the gas-to-liquid ratio can be calculated, thereby determining whether the oil and gas recovery system is operating normally. The use of the gas flowmeter 11 enables gas stations to conduct real-time monitoring of oil and gas recovery equipment, promptly identifying and resolving equipment failures, and meeting environmental and safety requirements. The connector connects the gas flowmeter 11 to the two connecting pipes 12, ensuring smooth gas flow between the flowmeter and the recovery system. The connecting pipes 12 are responsible for transferring gas from the oil and gas recovery system's main recovery pipe to the gas flowmeter 11, and from there back to the oil and gas recovery system's test valve, thus completing the gas circulation process for the entire gas-to-liquid ratio detection process. The connecting pipes 12 are connected to the gas flowmeter 11, the main recovery pipe, and the test valve via the connector, ensuring a tight connection between the various equipment components and smooth gas flow.

[0032] like Figure 2 As shown, further, the connector includes a first quick connector 13 and a second quick connector 14;

[0033] The first quick connector 13 is mounted on the gas flow meter 11 , and the second quick connector 14 is mounted on the connecting pipe 12 , and both ends of the connecting pipe 12 are mounted with the second quick connector 14 ;

[0034] The first quick connector 13 and the second quick connector 14 match each other.

[0035] The first quick connector 13 is assembled on the gas flow meter 11, and the second quick connector 14 is assembled on the connecting pipe 12. Their main function is to allow quick and easy connection and disconnection between the gas flow meter 11 and the connecting pipe 12, thereby facilitating the installation, disassembly and maintenance of the equipment. Through the close cooperation of the first quick connector 13 and the second quick connector 14, the smooth flow of gas between the gas flow meter 11 and the connecting pipe 12 can be ensured, gas leakage can be avoided, and the accuracy of gas-liquid ratio detection can be guaranteed. The use of quick connectors makes the equipment more flexible in connection and disconnection, can adapt to different working environments and conditions, and improves the practicality and convenience of the equipment. The two ports of the connecting pipe 12 are equipped with the second quick connector 14, so that when connecting the connecting pipe 12 to the gas flow meter 11, there is no need to distinguish the directions, which further simplifies the operation.

[0036] Furthermore, in order to allow the first test valve 3 to also adapt to the second quick connector 14, thereby increasing the selectivity of the second quick connector 14 and not being limited by the port of the first test valve 3, the port of the first test valve 3 away from the first tee pipe 2 is equipped with an adapter, and the adapter is matched with the second quick connector 14.

[0037] The main function of the adapter is to connect interfaces of different sizes or types so that originally incompatible components can be smoothly connected together. In the gas-liquid ratio detection equipment of the oil and gas recovery system of this embodiment, the adapter is used to connect the port of the first detection valve 3 with the connecting pipe of the mobile gas flow detector 1, thereby realizing the effective connection between the detection equipment and the oil and gas recovery system. In oil and gas recovery systems of different models and specifications, the first three-way pipe 2 must follow the model change of the recovery main pipe of the oil and gas recovery system. In this embodiment, an adapter can also be connected between the first three-way pipe 2 and the first detection valve 3, so that there is no need to replace the first detection valve 3, so that the first detection valve 3, that is, the detection equipment, can adapt to oil and gas recovery systems of different models and specifications, thereby improving the versatility and applicability of the equipment.

[0038] Furthermore, the first detection valve 3 is provided with a first plug that matches the adapter. The first plug and the adapter are provided in a group, that is, if there is one adapter provided on the first detection valve 3, there will be one first plug provided.

[0039] The primary function of the first plug is to seal the port of the first test valve 3, preventing gas or liquid from leaking out of the oil and gas recovery system when testing is not required. When the testing equipment is not in use, the first plug protects the connecting component, the adapter, from contamination and damage from the outside environment, extending the service life of the equipment.

[0040] Furthermore, the mobile gas flow meter 1 includes two second plugs 15 that mate with the second quick connector 14. The second plugs 15 are used to seal the ends of the connecting tube 12, ensuring that no gas or liquid leaks from either end of the connecting tube 12 when not in use, thereby maintaining the integrity and safety of the oil and gas recovery system. Installing the second plugs 15 ensures that the connecting tube 12 of the mobile gas flow meter 1 will not be damaged or contaminated by accidental opening during transport or storage, while also facilitating the overall handling and storage of the device.

[0041] In an optional embodiment, four second plugs 15 can be provided, and two third plugs that can be matched with the first quick connectors 13 can be provided. In this way, when the mobile gas flow detector 1 is transported and stored as a whole, the gas flow meter 11 and the connecting pipe 12 can be completely separated for storage and transportation. When the mobile gas flow detector 1 needs to be transported or stored, the operator can easily seal the first quick connector 13 with the third plug and simultaneously seal the two ends of the two connecting pipes 12 with the four second plugs 15. In this way, the gas flow meter 11 and the connecting pipe 12 can be completely separated, making the entire device more compact and easy to carry and store. The separated components can be packaged separately, reducing space usage and also reducing the risk of damage caused by collision or squeezing during transportation. When a component of the mobile gas flow detector 1 (such as the connecting pipe 12 or the gas flow meter 11) is damaged, the operator does not need to return the entire device to the manufacturer for repair or replacement, but can directly replace the damaged component. By sealing undamaged components with the third and second plugs 15, environmental pollution and safety hazards caused by oil and gas leakage during the replacement process can be avoided. Because each component can be replaced and repaired individually, even if a component fails, the operation of the entire device will not be affected. This significantly improves the utilization and reliability of the device. Furthermore, this design makes the device more adaptable to different operating environments and requirements, allowing for flexible configuration and adjustment based on actual conditions. Furthermore, this design simplifies and expedites maintenance work, reducing both cost and time.

[0042] Furthermore, the connecting pipe 12 is configured as a hose. Compared to rigid pipes, hoses offer greater flexibility, allowing for easier adaptation to various installation environments and space constraints, making the layout and connection of detection equipment more flexible and adaptable. During the operation of the oil and vapor recovery system, vibrations and stresses may be generated. The hose absorbs and mitigates these vibrations and stresses, thereby protecting the connected components from damage and extending the service life of the equipment. The hose is easier to bend and rotate, making maintenance and replacement of connected components simpler and faster, reducing maintenance costs and difficulty.

[0043] Furthermore, a conductive wire 16 is provided on the inner wall of the connecting tube 12, and the conductive wire 16 is connected to the connector on the end of the connecting tube 12. The primary function of the conductive wire 16 is to prevent static electricity from accumulating inside the connecting tube 12 during the gas-to-liquid ratio test in the gas station's oil and gas recovery system, thereby avoiding safety hazards such as fire or explosion caused by static electricity. By connecting the conductive wire 16 to the connector on the end of the connecting tube 12, static electricity can be effectively directed underground or to other safe areas, ensuring a smooth test. This design not only improves the safety of the equipment but also protects the personal safety of gas station staff and customers. At the same time, static electricity can interfere with the gas flow meter's measurement results, resulting in inaccurate gas-to-liquid ratio data. Eliminating static electricity ensures the accuracy and reliability of test results. Static electricity can damage the equipment's electronic components and connections, leading to equipment failure or performance degradation. Eliminating static electricity helps extend the equipment's service life and reduce repair and replacement costs. Gas stations are flammable and explosive environments, and static electricity control is strictly required. Installing the conductive wire 16 to eliminate static electricity complies with gas station safety regulations and standards, and helps improve the overall safety level of gas stations.

[0044] Furthermore, the conductive wire 16 is made of copper. Copper has excellent electrical conductivity and can efficiently transfer static electricity, ensuring that static electricity within the connecting tube 12 is promptly eliminated, thereby improving the safety of the device. Copper is also corrosion-resistant and oxidation-resistant, extending the service life of the conductive wire 16, reducing replacement frequency, and lowering maintenance costs.

[0045] In an optional embodiment, the conductive wire 16 may also be made of:

[0046] Aluminum: Aluminum is also a commonly used conductive material. Although its conductivity is slightly inferior to copper, its cost is relatively low, which can reduce the cost burden of equipment. However, aluminum is not as corrosion-resistant and oxidative-resistant as copper, and may require more frequent maintenance.

[0047] Silver: Silver has better conductivity than copper and is an ideal conductive material. However, silver is expensive and easily oxidized, requiring special protective measures to maintain its conductive properties.

[0048] This testing equipment primarily assesses the operating status of the vapor recovery system by measuring the ratio of gas flow to refueling volume (i.e., the gas-to-liquid ratio) during the vapor recovery process. The equipment is constructed by modifying the existing vapor recovery main pipe, adding components such as the first T-piece 2, the first test valve 3, and quick connectors, and equipped with a high-precision, explosion-proof Roots gas flow meter (or mobile gas flow meter 1), creating a complete testing system. During testing, the meter is connected to the vapor recovery main pipe and the test valve via a bypass connection, forming a closed measurement circuit. When the fuel dispenser is raised to refuel, the vapor recovery system activates, the gas flow meter records the return gas volume, and the fuel dispenser simultaneously records the fuel volume. By calculating the ratio of the fuel volume to the return gas volume, the gas-to-liquid ratio can be determined. For example, if the fuel dispenser is refueling at least 15 liters, the fuel dispenser's fuel volume and the gas flow meter's return gas volume are recorded. A calculation correction table is then filled to determine the gas-to-liquid ratio. Gas station gas-liquid ratio testing can be combined with the fuel gun self-test. Set the fuel volume to 20 liters, and add a 20-liter standard graduated cylinder during testing to calculate the fuel gun's accuracy. This significantly reduces the time required for both the gas-liquid ratio and fuel gun self-tests. During testing, record the fuel volume, gas volume, ambient temperature, and oil temperature. Substituting this data into a correction calculation table will yield the gas-liquid ratio. If the data is abnormal, data from different fuel dispensers on the same line, adjacent fuel dispensers, and different return air lines can be compared to determine if the cause is a malfunction in the vapor recovery vacuum pump or abnormal fluid resistance in the vapor recovery pipeline.

[0049] Specifically, analyzing abnormal gas-liquid ratio test results reveals significant discrepancies between different nozzles at the same dispenser, suggesting an abnormal vacuum pump return air volume. This can be corrected by adjusting the return air volume on the oil and gas recovery control panel or replacing the vacuum pump. Significant discrepancies in test data from adjacent dispensers suggest excessive fluid resistance in the oil and gas recovery pipeline between the two dispensers, which can be addressed by cleaning or replacing the pipeline. Significant discrepancies in test results at different times and for different storage levels suggest a significant pressure differential within the tank, which can be addressed by testing and replacing the PV valve.

[0050] Through the detection of this detection equipment, gas stations can understand the operating status of the oil and gas recovery system in real time, discover and solve problems in time, and ensure the normal operation and environmental protection requirements of the oil and gas recovery system.

[0051] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0052] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or terminal device that includes the element.

[0053] The technical solutions provided by this application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is only intended to help understand this application, and the contents of this specification should not be construed as limiting this application. At the same time, for those skilled in the art, according to this application, there may be various changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all implementation methods here, and obvious changes or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A device for detecting the gas-liquid ratio of the oil and gas recovery system of a gas station, characterized in that: The detection equipment includes: a mobile gas flow detector, a first three-way pipe and a first detection valve; The first tee pipe is arranged on the recovery main pipe of the oil and gas recovery system; The first port of the first detection valve is connected to the first three-way pipe, and the second port of the detection valve is connected to the mobile gas flow detector; The mobile gas flow detector includes a gas flow meter, a connector and two connecting pipes; The two ports of the gas flow meter are respectively connected to the two connecting pipes through the connectors; One end of the two connecting pipes away from the gas flow meter is connected to the first detection valve and the detection valve of the oil and gas recovery system respectively.

2. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 1 is characterized in that: The connector includes a first quick connector and a second quick connector; The first quick connector is assembled on the gas flow meter, the second quick connector is assembled on the connecting pipe, and both ends of the connecting pipe are assembled with the second quick connector; The first quick connector and the second quick connector match each other.

3. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 2 is characterized in that: A port of the first detection valve away from the first three-way pipe is equipped with an adapter, and the adapter matches the second quick connector.

4. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 3 is characterized in that: The first detection valve is provided with a first plug matching the adapter.

5. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 2 is characterized in that: The mobile gas flow detector further includes two second plugs, and the second plugs are matched with the second quick connectors.

6. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 1 is characterized in that: The connecting pipe is configured as a hose.

7. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 1 is characterized in that: The inner wall of the connecting pipe is provided with a conductive wire, and the conductive wire is connected to the connecting head on the end of the connecting pipe.

8. The gas-liquid ratio detection device for the oil vapor recovery system of a gas station according to claim 7 is characterized in that: The conductive wire is made of copper.

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