Medium state adjustable gas flow velocity measurement standard device and method

Abstract

The invention belongs to the field of measurement and detection devices, and discloses a gas flow rate measurement standard device and method with an adjustable medium state. The gas flow velocity measurement standard device with the adjustable medium state comprises a concentric-square-shaped flow velocity hole body, a power module, a temperature adjusting module, a gas extraction module, a gas mixing module, a reference flow velocity sensor, a standard flow velocity sensor, a pressure sensor, a temperature sensor, a safety exhaust valve and a mounting interface. According to the gas flow velocity measurement standard device and method with the adjustable medium state, the gas flow velocity, the substance, the pressure and the temperature are adjusted at the same time, and the gas flow velocity measurement standard device and method can be used for detecting indication errors of fluid dynamic multi-parameter detection equipment capable of detecting the flow velocity, the substance, the temperature and the pressure at the same time.

Description

Technical Field

[0001] The invention belongs to the field of metering and detecting devices, and relates to a gas flow rate metering standard device and method with adjustable medium state. Background Art

[0002] As the most widely used sensing equipment in industry, the degree of intelligence of flow and flow velocity sensors is an important factor affecting the development of industrial intelligence. In the fields of underground oil and gas extraction, oil and gas pipeline transportation, petrochemicals, etc., flow / flow velocity sensors that simply measure the flow and flow velocity of crude oil, natural gas, and refined oil and gas in production and transportation pipelines can no longer meet the requirements of industrial intelligent production. It is necessary to simultaneously monitor the medium state parameters such as the temperature, pressure, and material composition of the fluid in the pipeline to ensure production quality and safety. However, there is currently no metering and detection device that can quantitatively adjust the temperature, pressure, material, and flow velocity of the fluid to test and calibrate sensors for simultaneous detection of flow velocity, temperature, pressure, and material, resulting in a lack of technical support for the research and development of related multi-parameter detection equipment. Summary of the invention

[0003] In order to realize a metering and detection device that can quantitatively adjust fluid temperature, pressure, material composition, and flow rate at the same time, the present invention proposes a gas flow rate metering standard device and method with adjustable medium state.

[0004] The technical solution adopted by the present invention is:

[0005] A gas flow rate measurement standard device with adjustable medium state, comprising a meandering flow rate cavity 11, a power module 12, a temperature adjustment module 13, an air extraction module 14, a gas mixing module 15, a reference flow rate sensor 16, a standard flow rate sensor 17, a pressure sensor 18, a temperature sensor 19, a safety exhaust valve 20, and an installation interface 21.

[0006] The zigzag velocity tunnel 11 is a zigzag closed structure, in which the gas medium circulates without leaking outward or penetrating inward; the outer side is covered with thermal insulation material to reduce the degree of heat exchange between the gas in the tunnel and the outside; the test section of the zigzag velocity tunnel 11 can generate a flow field that is uniformly distributed on the vertical cross section.

[0007] The power module 12 provides a power source for the gas to circulate in the serpentine flow cavity 11 and has a self-cooling and heat dissipation function.

[0008] The temperature adjustment module 13 is used to cooperate with the heat preservation material on the meandering velocity tunnel 11 to change the temperature of the gas in the meandering velocity tunnel 11 .

[0009] The exhaust module 14 is used to exhaust the gas in the meandering flow velocity cavity 11 and reduce the gas pressure in the meandering flow velocity cavity 11 .

[0010] The gas mixing module 15 is used to prepare a mixed gas for testing and inject the mixed gas into the meandering flow velocity cavity 11 , and at the same time plays a role in increasing the gas pressure in the meandering flow velocity cavity 11 .

[0011] The reference flow velocity sensor 16 is installed in the test section of the meandering flow velocity tunnel 11 and is used to measure the flow velocity value of the test section of the meandering flow velocity tunnel 11. The measured flow velocity value is the flow velocity reference value of the device.

[0012] The standard flow velocity sensor 17 is installed on the test section of the meandering flow velocity cavern 11, and is symmetrical with the reference flow velocity sensor 16 about the central axis of the test section. It is used to measure the flow velocity value of the test section of the meandering flow velocity cavern 11. The measured flow velocity value is a reference flow velocity value. By comparing it with the flow velocity value measured by the reference flow velocity sensor 16, the fluid state in the meandering flow velocity cavern 11 is monitored.

[0013] The pressure sensor 18 is installed on the meandering flow velocity cavern 11 to measure the gas pressure inside the meandering flow velocity cavern 11; multiple pressure sensors 18 can be installed at different pipeline positions of the meandering flow velocity cavern 11 to monitor the pressure at different positions of the meandering flow velocity cavern 11 and monitor the safety state and uniformity of the gas pressure inside the meandering flow velocity cavern 11.

[0014] The temperature sensor 19 is installed on the meandering flow velocity cavern 11 to measure the gas temperature in the meandering flow velocity cavern 11; multiple temperature sensors 19 can be installed at different pipeline positions of the meandering flow velocity cavern 11 to monitor the temperature at different positions of the meandering flow velocity cavern 11 and monitor the safety state and uniformity of the gas temperature in the meandering flow velocity cavern 11.

[0015] The safety exhaust valve 20 is installed on the meandering flow velocity cavity 11, and can restore the gas pressure in the meandering flow velocity cavity 11 to the same as the atmospheric pressure. It can be controlled not only by the control system, but also by manual operation.

[0016] The installation interface 21 is installed on the meandering flow velocity cavity 11 and is used to install the sensor to be tested and ensure the sealing of the installation position to prevent gas leakage.

[0017] A further feature is that it also includes a control system and a power supply unit, which provides power to the gas flow rate measurement standard device with adjustable medium state and the control system.

[0018] The metering system control system is connected to the power module 12, the temperature adjustment module 13, the air extraction module 14, the gas mixing module 15, the reference flow rate sensor 16, the standard flow rate sensor 17, the pressure sensor 18, the temperature sensor 19, and the safety exhaust valve 20 to complete the functions of collecting information, controlling equipment, safety protection, data calculation and storage, as follows:

[0019] (1) Information collection: collecting status information and indication information of the power module 12, the heat regulating module 13, the air extraction module 14, the gas mixing module 15, the reference flow rate sensor 16, the standard flow rate sensor 17, the pressure sensor 18, the temperature sensor 19, the safety exhaust valve 20, and the power supply 2;

[0020] (2) Control equipment: Send control instructions to the power module 12, the temperature control module 13, the air extraction module 14, the gas mixing module 15, the safety exhaust valve 20, and the power supply 2 to change the working state of the relevant equipment;

[0021] (3) Safety protection: monitor the current and temperature status of the power module 12. When the current or temperature of the power module 12 exceeds the alarm threshold, send a control instruction to the power module 12 to reduce the working efficiency of the power module 12. If the current or temperature of the power module 12 exceeds the alarm threshold and exceeds the safety threshold, send a control instruction to the power module 12 to stop the power module 12 from working; monitor the temperature, pressure and flow rate of the fluid in the circular flow velocity cavity 11; when the temperature exceeds the alarm threshold, send a temperature control instruction to the temperature control module 13 to make the temperature return to the alarm threshold; if the temperature exceeds the safety threshold, send a temperature control instruction to the temperature control module 13 to make the temperature return to the alarm threshold. The temperature control module 13 sends a control instruction to stop the temperature control module 13; when the pressure exceeds the alarm threshold, a control instruction is sent to the air extraction module 14 and the gas mixing module 15 to make the pressure return to the alarm threshold. If the pressure exceeds the safety threshold, a control instruction is sent to the air extraction module 14, the gas mixing module 15 and the safety exhaust valve 20 to stop the air extraction module 14 and the gas mixing module 15 and open the safety exhaust valve 20; if the flow rate exceeds the alarm threshold, a control instruction is sent to the power module 12 to make the flow rate return to the threshold. If the flow rate exceeds the safety threshold, an instruction is sent to the power module 12 to stop the power module 12.

[0022] The beneficial effects of the present invention are:

[0023] The gas flow rate measurement standard device and method with adjustable medium state proposed in the present invention realize the simultaneous adjustment of gas flow rate, substance, pressure and temperature, and can be used to detect the indication error of fluid dynamic multi-parameter detection equipment with simultaneous detection of flow rate, substance, temperature and pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the structure of the gas flow rate measurement standard device with adjustable medium state of the present invention.

[0025] In the figure: 11 is a circular flow velocity cavity; 12 is a power module; 13 is a temperature control module; 14 is an air extraction module; 15 is an air mixing module; 16 is a reference flow velocity sensor; 17 is a standard flow velocity sensor; 18 is a pressure sensor; 19 is a temperature sensor; 20 is a safety exhaust valve; 21 is an installation interface. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the specific structure, principle and working process of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] As shown in the figure, a gas flow rate measurement standard device with adjustable medium state has the following working process: the interior of the meandering flow rate cave body 11 is a closed structure, and when the exhaust module 14, the gas mixing module 15, and the safety exhaust valve 20 are not opened, the gas in the meandering flow rate cave body 11 is isolated from the external atmospheric environment; when the gas material composition in the meandering flow rate cave body 11 does not meet the test requirements, the exhaust module 14 is used to extract the original gas in the meandering flow rate cave body 11, and when the gas pressure in the meandering flow rate cave body 11 is stable, the residual original gas pressure in the meandering flow rate cave body 11 is p e , temperature is T e , stop the air extraction module 14, use the gas mixing module 15 to configure the gas and inject it into the meandering flow velocity tunnel 11, until the pressure in the meandering flow velocity tunnel 11 reaches the test pressure p o At this time, the concentration of a certain substance component in the zigzag flow tunnel 11 is n i It can be expressed by formula (1):

[0028]

[0029] Among them, T o It means that the pressure in the zigzag velocity tunnel reaches the test pressure p o The temperature of the gas in the zigzag flow tunnel 11, n ei Indicates the concentration of a substance in the original gas, n oi Indicates the concentration of a certain substance component in the gas configured by the gas mixing module 15; when the pressure in the meandering flow velocity cavern 11 is higher than the test requirement, the control system is used to control the safety exhaust valve 20 to open and discharge the gas in the meandering flow velocity cavern 11 until the pressure in the meandering flow velocity cavern 11 reaches the test requirement; when the pressure in the meandering flow velocity cavern 11 is lower than the test requirement, the gas mixing module 15 is used to configure the test gas and inject it into the meandering flow velocity cavern 11 until the pressure in the meandering flow velocity cavern 11 reaches the test pressure p o; The temperature control module 13 can heat up and cool down the temperature in the meandering flow velocity cavern 11 so that the internal gas temperature reaches the test requirements; the gas in the meandering flow velocity cavern 11 circulates back and forth in the cavern under the drive of the power module 12, and under the action of the internal structure rectification structure of the meandering flow velocity cavern 11, the gas produces the same flow velocity value at the reference flow velocity sensor 16, the standard flow velocity sensor 17 and the sensor under test, and changing the power of the power module 12 can adjust the flow velocity value of the gas at the reference flow velocity sensor 16, the standard flow velocity sensor 17 and the sensor under test, and the accuracy of the indication of the sensor under test at different flow rates is detected according to the indication of the reference flow velocity sensor 16 and the standard flow velocity sensor 17.

Claims

1. A gas flow rate measurement standard device with adjustable medium state, characterized in that: It comprises a serpentine flow velocity cavity (11), a power module (12), a temperature adjustment module (13), an air extraction module (14), an air mixing module (15), a reference flow velocity sensor (16), a standard flow velocity sensor (17), a pressure sensor (18), and a temperature sensor (19); The meandering velocity tunnel (11) is a meandering closed structure, in which the gas medium circulates without leaking outward or penetrating inward; the outer side is covered with a thermal insulation material to reduce the degree of heat exchange between the gas in the tunnel and the outside; the test section of the meandering velocity tunnel (11) can generate a velocity field that is uniformly distributed on a vertical cross section; The power module (12) provides a power source for the circulation of gas in the serpentine flow velocity cavity (11), and also has a self-cooling and heat dissipation function; The temperature adjustment module (13) is used to cooperate with the heat insulation material on the meandering flow velocity hole (11) to change the temperature of the gas in the meandering flow velocity hole (11); The exhaust module (14) is used to discharge the gas in the meandering flow velocity cavity (11), and at the same time plays a role in reducing the gas pressure in the meandering flow velocity cavity (11); The gas mixing module (15) is used to prepare a mixed gas for testing and inject the mixed gas into the meandering velocity cavity (11), and at the same time plays a role in increasing the gas pressure in the meandering velocity cavity (11); The reference flow velocity sensor (16) is installed in the test section of the meandering flow velocity tunnel (11) and is used to measure the flow velocity value of the test section of the meandering flow velocity tunnel (11), and the measured flow velocity value is the flow velocity reference value of the device; The standard flow velocity sensor (17) is installed on the test section of the meander-shaped flow velocity tunnel (11) and is symmetrical with the reference flow velocity sensor (16) about the central axis of the test section. The standard flow velocity sensor (17) is used to measure the flow velocity value of the test section of the meander-shaped flow velocity tunnel (11). The measured flow velocity value is the reference flow velocity value. By comparing it with the flow velocity value measured by the reference flow velocity sensor (16), the fluid state in the meander-shaped flow velocity tunnel (11) is monitored. The pressure sensor (18) is installed on the meandering flow velocity cavern (11) to measure the gas pressure in the meandering flow velocity cavern (11); a plurality of pressure sensors (18) can be installed at different pipeline positions of the meandering flow velocity cavern (11) to monitor the pressure at different positions of the meandering flow velocity cavern (11) and monitor the safety state and uniformity of the gas pressure in the meandering flow velocity cavern (11); The temperature sensor (19) is installed on the meandering flow velocity tunnel (11) to measure the temperature of the gas in the meandering flow velocity tunnel (11); a plurality of temperature sensors (19) can be installed at different pipeline positions of the meandering flow velocity tunnel (11) to monitor the temperature at different positions of the meandering flow velocity tunnel (11) and monitor the safety state and uniformity of the temperature of the gas in the meandering flow velocity tunnel (11).

2. A gas flow rate measurement standard device with adjustable medium state according to claim 1, characterized in that: It also includes a safety exhaust valve (20) which is installed on the meandering flow velocity cavity (11) and can restore the gas pressure in the meandering flow velocity cavity (11) to the same as the atmospheric pressure. The safety exhaust valve (20) can be controlled by a control system and can also be manually operated.

3. A gas flow rate measurement standard device with adjustable medium state according to claim 1, characterized in that: It also includes a mounting interface (21), which is mounted on the meandering flow velocity cavity (11) and is used to mount the sensor to be tested and ensure the sealing of the mounting position to prevent gas leakage.

4. A gas flow rate measurement standard device with adjustable medium state according to claim 1, 2 or 3, characterized in that: The control system is also included. The control system is connected to the power module (12), the temperature adjustment module (13), the air extraction module (14), the gas mixing module (15), the reference flow rate sensor (16), the standard flow rate sensor (17), the pressure sensor (18), the temperature sensor (19), and the safety exhaust valve (20) for signal connection, and completes the functions of collecting information, controlling equipment, safety protection, data calculation and storage, as follows: (1) Collecting information: collecting status information and indication information of the power module (12), the heat regulating module (13), the air extraction module (14), the gas mixing module (15), the reference flow rate sensor (16), the standard flow rate sensor (17), the pressure sensor (18), the temperature sensor (19), the safety exhaust valve (20), and the power source 2; (2) Control equipment: sending control instructions to the power module (12), the temperature control module (13), the air extraction module (14), the gas mixing module (15), the safety exhaust valve (20), and the power supply 2 to change the working state of the relevant equipment; (3) Safety protection: monitoring the current and temperature status of the power module (12); when the current or temperature of the power module (12) exceeds the alarm threshold, sending a control instruction to the power module (12) to reduce the working efficiency of the power module (12); if the current or temperature of the power module (12) exceeds the alarm threshold very seriously and exceeds the safety threshold, sending a control instruction to the power module (12) to stop the power module (12) from working; monitoring the temperature, pressure and flow rate of the fluid in the serpentine flow velocity cavity (11); when the temperature exceeds the alarm threshold, sending a temperature control instruction to the temperature control module (13) to make the temperature return to the alarm threshold; if the temperature exceeds the safety threshold, sending a temperature control instruction to the temperature control module (13) to stop the operation of the power module (12); ... ) to stop the temperature control module (13); when the pressure exceeds the alarm threshold, a control instruction is sent to the air extraction module (14) and the gas mixing module (15) to make the pressure return to the alarm threshold; if the pressure exceeds the safety threshold, a control instruction is sent to the air extraction module (14), the gas mixing module (15) and the safety exhaust valve (20) to stop the air extraction module (14) and the gas mixing module (15) and to open the safety exhaust valve (20); if the flow rate exceeds the alarm threshold, a control instruction is sent to the power module (12) to make the flow rate return to the threshold; if the flow rate exceeds the safety threshold, an instruction is sent to the power module (12) and the power source 2 to stop the power module (12).

5. A gas flow rate measurement standard device with adjustable medium state according to claim 4, characterized in that: A power supply unit is provided to provide power to a gas flow rate measurement standard device and a control system with adjustable medium state.

6. The method of a gas flow rate measurement standard device with adjustable medium state according to any one of claims 1 to 5, characterized in that: The interior of the zigzag flow velocity cavern (11) is a sealed structure. When the exhaust module (14), the gas mixing module (15) and the safety exhaust valve (20) are not opened, the gas in the zigzag flow velocity cavern (11) is isolated from the external atmospheric environment. When the material composition of the gas in the zigzag flow velocity cavern (11) does not meet the test requirements, the exhaust module (14) is used to extract the original gas in the zigzag flow velocity cavern (11). When the gas pressure in the zigzag flow velocity cavern (11) is stable, the residual original gas pressure in the zigzag flow velocity cavern (11) is p e , temperature is T e , stop the operation of the exhaust module (14), use the gas mixing module (15) to prepare the gas and inject it into the zigzag flow velocity cavity (11), until the pressure in the zigzag flow velocity cavity (11) reaches the test pressure p o At this time, the concentration of a certain substance component in the zigzag flow tunnel (11) is n i It can be expressed by formula (1): Among them, T o Indicates that the pressure in the meander velocity tunnel (11) reaches the test pressure p o The temperature of the gas in the zigzag flow tunnel (11) at 1000 s, n ei Indicates the concentration of a substance in the original gas, n oi Indicates the concentration of a certain substance component in the gas configured by the gas mixing module (15); when the pressure in the zigzag flow velocity cavity (11) is higher than the test requirement, the control system is used to control the safety exhaust valve (20) to open and discharge the gas in the zigzag flow velocity cavity (11) until the pressure in the zigzag flow velocity cavity (11) reaches the test requirement; when the pressure in the zigzag flow velocity cavity (11) is lower than the test requirement, the gas for testing is configured by the gas mixing module (15) and injected into the zigzag flow velocity cavity (11) until the pressure in the zigzag flow velocity cavity (11) reaches the test pressure p o The temperature regulating module (13) can heat up and cool down the temperature inside the meandering flow velocity cavern (11) so that the temperature of the gas inside the meandering flow velocity cavern (11) reaches the test requirements; the gas inside the meandering flow velocity cavern (11) circulates and reciprocates inside the cavern under the drive of the power module (12); under the action of the rectifying structure inside the meandering flow velocity cavern (11), the gas generates the same flow velocity value at the reference flow velocity sensor (16), the standard flow velocity sensor (17) and the sensor to be tested; changing the power of the power module (12) can adjust the flow velocity value of the gas at the reference flow velocity sensor (16), the standard flow velocity sensor (17) and the sensor to be tested; and the accuracy of the indication of the sensor to be tested at different flow velocities is detected according to the indication of the reference flow velocity sensor (16) and the standard flow velocity sensor (17).

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