Gas well liquid level detection device for gas storage

Abstract

The utility model relates to a detection device, in particular to a liquid level detection device for a gas well of a gas storage. The detection device is composed of an explosion-proof box body and a detection head, wherein the detection head is composed of a box body connecting disc, an infrasonic wave transducer, an infrasonic wave distance measuring sensor and a temperature and pressure integrated sensor. According to the detection device, low-frequency infrasonic waves are generated through the infrasonic wave transducer, and then the liquid level is detected through the infrasonic waves, so that adverse effects caused by a traditional ammunition sound production mode can be overcome, environmental pollution is effectively prevented, potential safety hazards are reduced, energy consumption is reduced, physical abrasion possibly generated by a traditional electromagnetic valve opening and closing method can be avoided, and the detection effect is good. And the direct contact and friction of mechanical parts are reduced, so that the service life of equipment is prolonged, the system failure rate and the maintenance cost are reduced, and the overall reliability is improved. The problems that an existing detection mode is high in safety risk and equipment is prone to damage are solved. The device is especially suitable for detecting the liquid level of the gas well in the gas storage.

Description

Technical Field

[0001] The utility model relates to a detection device, in particular to a gas well liquid level detection device for a gas storage reservoir. Background Art

[0002] The liquid level detection of gas wells in gas storage is an important detection item of gas storage. By detecting the liquid level, the gas storage volume, well leakage and other indicators can be detected, which can effectively ensure the safety of gas storage. At present, the gas well liquid level detection equipment of gas storage generally uses explosive bombs to make sounds, or the traditional solenoid valve opens and closes instantly to make the high-pressure gas explode instantly to generate infrasound waves. When using explosive bombs to make sounds to generate infrasound waves, due to the need for explosion, the shock wave generated by the explosion is likely to cause physical impact on the surrounding environment and equipment, resulting in equipment damage or environmental damage; at the same time, due to the explosion, the flames will cause secondary explosions or fires in some cases, especially in flammable and explosive gas environments, resulting in a narrow scope of application. The rapid release of high-pressure gas to generate infrasound waves requires the consumption of combustible gases stored in the gas storage, which not only consumes a lot of energy, but also pollutes the atmospheric environment with the discharged gas, especially if the released gas contains greenhouse gases (such as methane) or other harmful substances, which are easy to cause fires when discharged in large quantities. At the same time, if the gas density is greater than that of air, the sinking of the gas is easy to cause suffocation, which poses a great safety hazard. In addition, frequent instantaneous release of high-pressure gas has a high impact on the solenoid valve and other related components, which will cause rapid wear of the equipment, increase maintenance costs and failure rate. Therefore, it is necessary to design a gas storage well liquid level detection device to solve the above problems. Summary of the invention

[0003] The purpose of the utility model is to provide a gas storage well liquid level detection device which can perform liquid level detection and effectively reduce safety risks and equipment damage.

[0004] The technical solution of the utility model is:

[0005] A gas well liquid level detection device for a gas storage reservoir, which consists of an explosion-proof box and a detection head arranged on the explosion-proof box, characterized in that: the detection head consists of a box connection plate, an infrasonic transducer, an infrasonic distance measuring sensor and a temperature-pressure integrated sensor, the box connection plate is a cup-shaped body, the bottom of the box connection plate is threadedly installed with an infrasonic transducer for converting electrical energy into infrasonic waves, and the end of the infrasonic transducer passes through the box connection plate and extends into the explosion-proof box; the box connection plate inside the explosion-proof box is threadedly installed with an infrasonic distance measuring sensor for measuring distance through infrasonic waves and a temperature-pressure integrated sensor for detecting temperature and pressure, and the ends of the infrasonic distance measuring sensor and the temperature-pressure integrated sensor extend into the box connection plate respectively; the box connection plate is fixedly connected to the explosion-proof box by fixing bolts.

[0006] An air collecting cylinder is arranged in the explosion-proof box, one side of the air collecting cylinder is connected with the box connecting plate through a short pipe, and the other side of the air collecting cylinder is connected with the outside of the explosion-proof box through a long pipe; an electromagnetic valve is arranged on the air collecting cylinder; the long pipe is fixedly connected with the explosion-proof box through a support conversion plate, and the air collecting cylinder is fixedly connected with the explosion-proof box through an air collecting cylinder bracket.

[0007] A connector for connecting to a gas well of a gas storage reservoir is installed on the port of the box connection plate through a compression nut.

[0008] A solar panel is installed on the explosion-proof box through a solar bracket, and the solar panel, the electrical appliances arranged in the explosion-proof box and the storage battery are connected through a charging and discharging circuit.

[0009] The charging and discharging circuit comprises a charging circuit, a voltage stabilizing circuit and a discharging circuit.

[0010] The electrical appliance comprises a main controller, a power amplifier and a wireless transceiver. The input end of the main controller is respectively connected to an infrasonic distance measuring sensor through a second RS485 bus and to an integrated temperature and pressure sensor through an ADC module; the output end of the main controller is connected to an infrasonic transducer through a power amplifier and to an electromagnetic valve through a relay; the bidirectional input and output end of the main controller is connected to the wireless transceiver through a first RS485 bus, and the wireless transceiver is wirelessly connected to a PC host computer.

[0011] The explosion-proof box is also provided with a power switch and a power indicator light.

[0012] The beneficial effects of the utility model are:

[0013] The gas storage well liquid level detection device generates low-frequency infrasound waves through an infrasound transducer, and then detects the liquid level through infrasound waves. It can not only overcome the adverse effects of the traditional ammunition sound generation method, effectively prevent environmental pollution, reduce safety hazards, and reduce energy consumption, but also avoid the physical wear that may be caused by the traditional solenoid valve opening and closing method, reduce the direct contact and friction of mechanical parts, thereby extending the service life of the equipment, reducing the system failure rate and maintenance costs, and increasing the overall reliability. The equipment is powered by solar panels and batteries, saving energy, reducing costs, being more economical and environmentally friendly, safe and reliable, and can provide stable electricity for the device. It solves the problems of high safety risks and easy damage of equipment in existing detection methods. It is particularly suitable for gas storage well liquid level detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the explosion-proof box of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the detection head of the utility model;

[0017] Figure 4 It is a cross-sectional schematic diagram of the detection head of the utility model;

[0018] Figure 5 It is a circuit block diagram of the utility model.

[0019] In the figure: 1. explosion-proof box, 2. box connection plate, 3. infrasonic transducer, 4. infrasonic ranging sensor, 5. temperature and pressure integrated sensor, 6. air collecting cylinder, 7. short pipe, 8. long pipe, 9. solenoid valve, 10. support conversion plate, 11. air collecting cylinder bracket, 12. tightening nut, 13. connector, 14. solar bracket, 15. solar panel, 16. battery, 17. main controller, 18. power amplifier, 19. wireless transceiver, 20. power switch, 21. power indicator light. DETAILED DESCRIPTION

[0020] The gas storage reservoir gas well liquid level detection device is composed of an explosion-proof box 1 and a detection head arranged on the explosion-proof box 1. The detection head is composed of a box connection plate 2, an infrasonic transducer 3, an infrasonic distance sensor 4 and a temperature and pressure integrated sensor 5. The box connection plate 2 is a cup-shaped body. The bottom thread of the box connection plate 2 is installed with an infrasonic transducer 3 for converting electrical energy into infrasonic waves. The end of the infrasonic transducer 3 passes through the box connection plate 2 and extends into the explosion-proof box 1. The working principle of the infrasonic transducer 3 is to convert the input electrical energy into low-frequency mechanical vibrations and generate infrasonic waves through low-frequency mechanical vibrations. Since the infrasonic waves are generated by the infrasonic transducer 3, compared with the infrasonic waves generated by ammunition and released gas, the infrasonic transducer 3 will not cause impact, will not produce flames, and does not need to release gas, which can effectively reduce equipment loss, reduce safety risks and save energy. An infrasonic ranging sensor 4 for measuring distance through infrasonic waves and a temperature-pressure integrated sensor 5 for detecting temperature and pressure are threadedly mounted on the box connecting plate 2 on the inner side of the explosion-proof box 1, and the ends of the infrasonic ranging sensor 4 and the temperature-pressure integrated sensor 5 extend into the box connecting plate 2 respectively; the function of the infrasonic ranging sensor 4 is to receive infrasonic waves through the infrasonic ranging sensor 4, when the infrasonic waves are emitted by the infrasonic transducer 3, the infrasonic ranging sensor 4 receives them for the first time, when the infrasonic waves encounter the liquid level of the gas well of the gas storage reservoir and are reflected to the infrasonic ranging sensor 4, the infrasonic ranging sensor 4 receives them again, and the propagation distance of the infrasonic waves is calculated by the time interval between the infrasonic ranging sensor 4 receiving the infrasonic waves twice, thereby calculating the liquid level height of the gas well of the gas storage reservoir. The function of the integrated temperature and pressure sensor is to measure the gas pressure and temperature in the gas well of the gas storage reservoir through the temperature and pressure sensor, thereby calculating the gas density in the gas well of the gas storage reservoir, thereby calculating the propagation speed of the infrasound wave in the gas well of the gas storage reservoir, and ensuring that the liquid level height of the gas well of the gas storage reservoir is calculated accurately. The box connecting plate 2 is fixedly connected to the explosion-proof box 1 by fixing bolts.

[0021] The explosion-proof housing 1 is provided with a gas collecting cylinder 6, one side of which is connected to the housing connection plate 2 through a short pipe 7, and the other side of which is connected to the outside of the explosion-proof housing 1 through a long pipe 8; a solenoid valve 9 is provided on the gas collecting cylinder 6; the long pipe 8 is fixedly connected to the explosion-proof housing 1 through a support conversion plate 10, and the gas collecting cylinder 6 is fixedly connected to the explosion-proof housing 1 through a gas collecting cylinder bracket 11. The function of the solenoid valve 9 is to control the on-off of the gas collecting cylinder 6 through the solenoid valve 9, and then control the on-off of the short pipe 7 and the long pipe 8, so as to control the discharge of gas in the gas well of the gas storage reservoir; on the one hand, the gas storage reservoir is depressurized by the discharge of gas in the gas well of the gas storage reservoir; on the other hand, the gas flow is controlled by switching the solenoid valve 9, so that the gas oscillates, thereby generating infrasound waves, so that when the infrasound transducer 3 is damaged, the gas collecting cylinder 6, the solenoid valve 9, the short pipe 7 and the long pipe 8 are used as a backup for the infrasound transducer 3 to ensure that the liquid level detection of the gas well of the gas storage reservoir is carried out normally.

[0022] A connector 13 for connecting to a gas well of a gas storage reservoir is installed on the port of the box connecting plate 2 through a compression nut 12. The box connecting plate 2 is connected to the gas well of the gas storage reservoir through the connector 13 and the box connecting plate 2 is fixed to the gas well of the gas storage reservoir.

[0023] A solar panel 15 is installed on the explosion-proof box 1 through a solar bracket 14. The solar panel 15, the electrical appliances arranged in the explosion-proof box 1, and the battery 16 are connected through a charge-discharge circuit. The solar panel 15 can absorb solar energy (light energy) to generate electrical energy, thereby supplying power to the electrical appliances through the charge-discharge circuit. At the same time, when there is surplus electrical energy generated by the solar panel 15, the battery 16 is supplied with power through the charge-discharge circuit to store energy. The function of the battery 16 is to supply power to the electrical appliances when there is insufficient light (on a cloudy day or at night) and the solar panel 15 does not generate enough electricity, so as to make up for the insufficient power supply of the solar panel 15 and ensure the operation of the electrical appliances.

[0024] The charge and discharge circuit includes a charging circuit, a voltage stabilizing circuit and a discharging circuit.

[0025] The electrical appliance includes a main controller 17, a power amplifier 18 and a wireless transceiver 19. The input end of the main controller 17 is connected to the infrasound ranging sensor 4 through the second RS485 bus; the input end of the main controller 17 is connected to the temperature and pressure integrated sensor 5 through the ADC module; the output end of the main controller 17 is connected to the infrasound transducer 3 through the power amplifier 18. The function of the power amplifier 18 is to amplify the input weak electrical signal through the power amplifier, so as to obtain enough power to drive the infrasound transducer 3 to generate infrasound waves, and output the power-amplified electrical signal to the infrasound transducer 3; the output end of the main controller 17 is connected to the solenoid valve 9 through a relay; the bidirectional input and output end of the main controller 17 is connected to the wireless transceiver 19 through the first RS485 bus, and the wireless transceiver 19 is wirelessly connected to the PC host computer. The main controller 17 is any one of a DSP (digital signal processor), a programmable logic controller (PLC) or an STM32 microcontroller.

[0026] The explosion-proof box 1 is also provided with a power switch 20 and a power indicator light 21 .

[0027] After the gas storage well liquid level detection device is installed at the wellhead of the gas storage well and the switch power is turned on, the main controller 17 and the wireless transceiver will initialize the equipment, and the PC host computer sends a command signal to the wireless transceiver 19 (such as the Internet of Things platform and the MQTT protocol). The wireless transceiver 19 and the main controller 17 realize command interaction through the first RS485 communication unit. These command signals include the start and stop acquisition signals of the infrasonic ranging sensor 4, the acquisition of the sampling frequency instruction of the infrasonic ranging sensor 4, the temperature and pressure integrated sensor 5 analog signal transmission instruction, and the opening or closing instruction of the solenoid valve 9. After the main controller 17 and the wireless data remote control transceiver 19 are initialized, the main controller 17 collects the temperature and pressure electrical signals obtained by the temperature and pressure integrated sensor 5 through the ADC module, and sends the temperature and pressure signals to the PC host computer in real time through the wireless transceiver 19. The user sends a test instruction through the PC host computer, and the wireless transceiver 19 receives and parses the instruction and sends a control signal to the main controller 17 through the first RS485 bus. The main controller 17 controls the charging and discharging of the solar panels and solar batteries according to the operating status of the control equipment and the current power consumption of the electrical appliances, and converts the control instructions parsed by the wireless transceiver 19 into control signals. The main controller 17 generates a control signal and transmits it to the power amplifier 18. The power amplifier 18 amplifies the input weak electrical signal and outputs it to the infrasound transducer 3, and the infrasound transducer 3 releases infrasound. The main controller 17 also sends a collection instruction to the infrasound ranging sensor 4 through the second RS485 bus. The infrasound ranging sensor 4 collects the infrasound signal and transmits it back to the main controller 17 through the second RS485 bus. The main controller 17 then transmits it back to the wireless transceiver 19, and the end user receives the annular liquid level of the gas storage well from the PC host computer. In addition, the user sends the solenoid valve control instruction to realize the on and off of the solenoid valve 9 with the high and low electrical signals of the relay, so as to achieve the purpose of assisting the pressure relief of the gas storage well.

[0028] The gas storage well liquid level detection device generates low-frequency infrasound waves through an infrasound transducer, and then detects the liquid level through infrasound waves. It can not only overcome the adverse effects of the traditional ammunition sound generation method, effectively prevent environmental pollution, reduce safety hazards, and reduce energy consumption, but also avoid the physical wear that may be caused by the traditional solenoid valve opening and closing method, reduce the direct contact and friction of mechanical parts, thereby extending the service life of the equipment, reducing the system failure rate and maintenance costs, and increasing the overall reliability. The equipment is powered by solar panels and batteries, saving energy, reducing costs, being more economical and environmentally friendly, safe and reliable, and can provide stable electricity for the device. It solves the problems of high safety risks and easy damage of equipment in existing detection methods. It is particularly suitable for gas storage well liquid level detection.

Claims

1. A gas storage well liquid level detection device, comprising an explosion-proof housing (1) and a detection head arranged on the explosion-proof housing (1), characterized in that: The detection head is composed of a box connection plate (2), an infrasonic wave transducer (3), an infrasonic wave distance measuring sensor (4) and an integrated temperature and pressure sensor (5); the box connection plate (2) is cup-shaped, and the bottom of the box connection plate (2) is threadedly mounted with an infrasonic wave transducer (3) for converting electrical energy into infrasonic waves, and the end of the infrasonic wave transducer (3) passes through the box connection plate (2) and extends into the explosion-proof box (1); the box connection plate (2) inside the explosion-proof box (1) is threadedly mounted with an infrasonic wave distance measuring sensor (4) for measuring distance through infrasonic waves and an integrated temperature and pressure sensor (5) for detecting temperature and pressure, and the ends of the infrasonic wave distance measuring sensor (4) and the integrated temperature and pressure sensor (5) extend into the box connection plate (2) respectively; the box connection plate (2) is fixedly connected to the explosion-proof box (1) by fixing bolts.

2. A gas storage well liquid level detection device according to claim 1, characterized in that: The explosion-proof housing (1) is provided with an air collecting cylinder (6); one side of the air collecting cylinder (6) is connected to the housing connection plate (2) via a short pipe (7), and the other side of the air collecting cylinder (6) is connected to the outside of the explosion-proof housing (1) via a long pipe (8); an electromagnetic valve (9) is provided on the air collecting cylinder (6); the long pipe (8) is fixedly connected to the explosion-proof housing (1) via a support conversion plate (10), and the air collecting cylinder (6) is fixedly connected to the explosion-proof housing (1) via an air collecting cylinder bracket (11).

3. A gas storage well liquid level detection device according to claim 1, characterized in that: A connector (13) for connecting to a gas well of a gas storage reservoir is installed on the port of the box connection plate (2) via a compression nut (12).

4. A gas storage well liquid level detection device according to claim 2, characterized in that: A solar panel (15) is mounted on the explosion-proof box (1) via a solar bracket (14); the solar panel (15), electrical appliances arranged in the explosion-proof box (1) and a storage battery (16) are connected via a charging and discharging circuit.

5. A gas storage well liquid level detection device according to claim 4, characterized in that: The charging and discharging circuit comprises a charging circuit, a voltage stabilizing circuit and a discharging circuit.

6. A gas storage well liquid level detection device according to claim 4, characterized in that: The electrical appliance comprises a main controller (17), a power amplifier (18) and a wireless transceiver (19); the input end of the main controller (17) is connected to the infrasonic distance sensor (4) through a second RS (485) bus and is connected to the temperature and pressure integrated sensor (5) through an ADC module; the output end of the main controller (17) is connected to the infrasonic transducer (3) through the power amplifier (18) and is connected to the solenoid valve (9) through a relay; the bidirectional input and output ends of the main controller (17) are connected to the wireless transceiver (19) through a first RS (485) bus; and the wireless transceiver (19) is wirelessly connected to a PC host computer.

7. A gas storage well liquid level detection device according to claim 4, characterized in that: The explosion-proof box (1) is also provided with a power switch (20) and a power indicator light (21).

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