CN112880759A - Ultrasonic wave type gas flow detection device for nuclear power chimney - Google Patents
Ultrasonic wave type gas flow detection device for nuclear power chimney Download PDFInfo
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- CN112880759A CN112880759A CN202110074048.7A CN202110074048A CN112880759A CN 112880759 A CN112880759 A CN 112880759A CN 202110074048 A CN202110074048 A CN 202110074048A CN 112880759 A CN112880759 A CN 112880759A
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- Prior art keywords
- ultrasonic
- chimney
- nuclear power
- wind speed
- speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
Abstract
The invention discloses an ultrasonic gas flow detection device for a nuclear power chimney, which is characterized in that a fixed support is radially arranged in a straight pipe section of the nuclear power chimney, so that the gas in the nuclear power chimney flows vertically through the fixed support, and data acquisition is facilitated; then, a plurality of speed measuring device interfaces are radially arranged on the fixed support, and the ultrasonic speed measuring device is connected through a connector of the ultrasonic speed measuring device, so that sampling measurement is performed through a plurality of measuring points, the measuring precision and accuracy are improved, meanwhile, the ultrasonic speed measuring device is convenient to disassemble, and the convenience in maintenance of the measuring device is improved; set up ultrasonic wave speed sensor into a plurality of connectors, signal processing unit and wind speed measurement ware at last to simplify speed sensor, can also avoid the flue gas dust to adhere to simultaneously, remove dustproof measures such as installation compressed air from, be favorable to improving measurement accuracy and degree of accuracy.
Description
Technical Field
The invention relates to the technical field of nuclear power gas flow detection, in particular to an ultrasonic gas flow detection device for a nuclear power chimney.
Background
With the improvement of environmental protection consciousness, the national requirements for monitoring the smoke emission are also improved, and the measurement relation of the nuclear power station on the generated smoke flow reports the calculation of the total emission amount of the radioactive gas to a supervision department. At present, a measuring device for detecting smoke of a nuclear power chimney by a nuclear power station mainly comprises a pitot tube differential pressure type measuring device and a thermal conductivity type measuring device. The pitot tube differential pressure type measuring device is a device corresponding to the pitot tube differential pressure type measuring method, and the specific principle is as follows: arranging a pressure taking component in the nuclear power chimney, and calculating the flow of the point by measuring the difference between the dynamic pressure and the static pressure at the position; the heat conduction measuring device is a device corresponding to the heat conduction measuring method, and the specific principle is as follows: and calculating the flow at the point by using the heat exchange relationship between the fluid in the airflow and the heat source through the thermal conduction principle. However, the measuring device is greatly affected by dust in a smoke medium, the surface of the thermosensitive element is easily adhered by the dust, and a pressure tapping pipe in the pitot tube differential pressure type measuring device is easily blocked by the dust, so that the measuring precision and accuracy are poor, and the requirement of the chimney smoke flow measuring precision cannot be met.
Disclosure of Invention
The invention aims to solve the technical problems that the existing measuring device for detecting smoke of a nuclear power chimney is poor in measuring precision and accuracy and high in maintenance cost, so that the invention provides the ultrasonic gas flow detecting device for the nuclear power chimney to improve the measuring precision and accuracy.
The invention is realized by the following technical scheme:
an ultrasonic gas flow detection device for a nuclear power chimney comprises a fixed support, a plurality of ultrasonic speed measuring devices and an upper computer; the fixed support is radially arranged in the straight pipe section of the nuclear power chimney;
the fixed support is radially provided with a plurality of speed measuring device interfaces, and each speed measuring device interface is used for being connected with one ultrasonic speed measuring device; the ultrasonic speed measuring device is used for converting the detected ultrasonic signals into wind speed values and sending the wind speed values to the upper computer.
Furthermore, the ultrasonic speed measuring device comprises a plurality of connectors, a signal processing unit and an air speed measurer;
the connector is used for inserting the ultrasonic speed measuring device into the speed measuring device interface;
the wind speed measurer is used for detecting an ultrasonic signal and sending the ultrasonic signal to the signal processing unit;
and the signal processing unit is used for receiving the ultrasonic signal sent by the wind speed measurer, processing the ultrasonic signal into a wind speed value and sending the wind speed value to the upper computer.
Furthermore, a positioning structure is arranged in the connector and used for positioning and installing the ultrasonic speed measuring device.
Furthermore, the ultrasonic speed measuring device also comprises an air speed measurer supporting arm, and an air speed measurer is arranged on the air speed measurer supporting arm;
the wind speed measurer is connected with the signal processing unit through the wind speed measurer supporting arm.
Furthermore, a signal cable is arranged in the fixed support;
and the signal processing unit is used for processing the ultrasonic signals into a wind speed value and transmitting the wind speed value to the upper computer through a signal cable.
Further, the upper computer is used for carrying out weighting calibration calculation on the wind speed value after the upper computer receives the wind speed value sent by the ultrasonic speed measuring device, so that the chimney gas flow speed is obtained and is transmitted to the nuclear power DCS.
Further, the performing a weighted calibration calculation on the wind speed value includes:
carrying out weighted calibration calculation on the wind speed values measured by all the ultrasonic speed measuring devices through a weighted calibration calculation formula to obtain the gas flow speed of the chimney; the weighted calibration calculation formula specifically includes:
wherein v represents the chimney gas flow velocity, n represents the ultrasonic velocity measurementNumber of devices, α1、α2、α3…αnRepresents a calibration coefficient, v, corresponding to the wind speed measuring device in each ultrasonic speed measuring device1、v2、v3…vnAnd the wind speed value corresponding to each wind speed measurer is shown.
Further, the straight pipe section of the nuclear power chimney comprises a vertical section, a connecting section and a horizontal section;
the vertical section vertically penetrates through the nuclear power chimney and is connected to one end of the connecting section, the connecting section is arranged in the nuclear power chimney, and the horizontal section penetrates through one side of the nuclear power chimney and is connected to the other end of the connecting section.
Furthermore, the fixed supports are horizontally arranged at intervals on the vertical section of the straight pipe section of the nuclear power chimney and are perpendicular to the vertical section of the straight pipe section of the nuclear power chimney;
the fixed supports are vertically arranged at intervals on the horizontal section of the straight pipe section of the nuclear power chimney and are perpendicular to the horizontal section of the straight pipe section of the nuclear power chimney.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the ultrasonic gas flow detection device for the nuclear power chimney, the fixing support is radially arranged in the straight pipe section of the nuclear power chimney, the speed measuring device interfaces are radially arranged on the fixing support and are used for being connected with the ultrasonic speed measuring devices, so that the measuring precision and accuracy are improved through sampling measurement of a plurality of measuring points, and meanwhile, the measuring points can be quickly replaced and maintained.
2. According to the ultrasonic gas flow detection device for the nuclear power chimney, the speed measurement device interface is arranged to be matched with the connector on the ultrasonic speed measurement device, so that the ultrasonic speed measurement device is convenient to disassemble, and the convenience in maintenance of the measurement device is improved.
3. Through set up the wind speed caliber in ultrasonic speed measurement device, simplify speed measurement device, the easy adnexed condition of flue gas dust takes place when can also avoiding using the pitot tube simultaneously, removes dustproof measures such as installation compressed air from, is favorable to improving measurement accuracy and degree of accuracy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of an embodiment of the present invention.
FIG. 2 is a schematic diagram of a specific structure according to an embodiment of the present invention.
FIG. 3 is another structural schematic of an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
the wind speed measuring device comprises a 1-connector, a 2-signal processing unit, a 3-wind speed measuring device supporting arm, a 4-wind speed measuring device, a 5-signal cable, a 6-fixing support and a 7-nuclear power chimney straight pipe section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in fig. 1-3, the invention provides an ultrasonic gas flow detection device for a nuclear power chimney, which comprises a fixed support 6, a plurality of ultrasonic speed measurement devices and an upper computer.
Wherein, fixed bolster 6 radially installs in nuclear power chimney straight tube section 7, and fixed bolster 6 radially is provided with a plurality of speed sensor interfaces, and each speed sensor interface is used for connecting an ultrasonic speed sensor. The ultrasonic speed measuring device is used for converting detected ultrasonic signals into wind speed values and sending the wind speed values to the upper computer.
Further, the ultrasonic speed measuring device comprises a plurality of connectors 1, a signal processing unit 2 and a wind speed measuring device 4. The connector 1 is used for inserting the ultrasonic speed measuring device into a speed measuring device interface; the wind speed measurer 4 is used for detecting an ultrasonic signal and sending the ultrasonic signal to the signal processing unit 2; and the signal processing unit 2 is used for receiving the ultrasonic signal sent by the wind speed measurer 4, processing the ultrasonic signal into a wind speed value and sending the wind speed value to the upper computer.
The wind speed measurer refers to a device for measuring the wind speed. The wind speed measurer in the embodiment adopts the ultrasonic sensor, so that the detection precision is improved, and meanwhile, the condition that flue gas dust is easy to attach can be avoided.
Specifically, the wind speed measurer 4 is arranged to detect the ultrasonic signal and send the ultrasonic signal to the signal processing unit 2, and the signal processing unit 2 records the corresponding receiving and sending time when the wind speed measurer 4 sends the ultrasonic signal and measures the wind speed of the current measuring point by a time difference method.
Further, a positioning structure is arranged in the connector 1 in this embodiment, and is used for positioning and installing the ultrasonic speed measuring device. The ultrasonic speed measuring device further comprises an air speed measurer supporting arm 3, an air speed measurer 4 is installed on the air speed measurer supporting arm 3, and the air speed measurer 4 is connected with the signal processing unit 2 through the air speed measurer supporting arm 3.
Further, the straight pipe section 7 of the nuclear power chimney in the embodiment comprises a vertical section, a connecting section and a horizontal section; the vertical section vertically penetrates through the nuclear power chimney and is connected to one end of the connecting section, the connecting section is arranged in the nuclear power chimney, and the horizontal section penetrates through one side of the nuclear power chimney and is connected to the other end of the connecting section.
The fixed brackets 6 are horizontally arranged at intervals on the vertical section of the straight pipe section 7 of the nuclear power chimney and are vertical to the vertical section of the straight pipe section 7 of the nuclear power chimney; the fixed brackets 6 are vertically arranged at intervals on the horizontal section of the straight pipe section 7 of the nuclear power chimney and are perpendicular to the horizontal section of the straight pipe section 7 of the nuclear power chimney.
Furthermore, a signal cable 5 is arranged in the fixed support 6, and the signal processing unit 2 processes the ultrasonic signals into a wind speed value and transmits the wind speed value to the upper computer through the signal cable 5. After receiving the wind speed value sent by the ultrasonic speed measuring device, the upper computer performs weighted calibration calculation on the wind speed value to obtain the chimney gas flow speed and transmits the chimney gas flow speed to the nuclear power DCS.
Specifically, after the upper computer receives the wind speed value sent by the ultrasonic speed measuring device, all the ultrasonic speed measuring devices are measured through a weighting calibration calculation formulaAnd carrying out weighted calibration calculation on the obtained wind speed value to obtain the gas flow speed of the chimney. The weighted calibration calculation formula of the present embodiment is specifically:
wherein v represents the flow velocity of the gas in the chimney, n represents the number of the ultrasonic speed measuring devices, and alpha1、α2、α3…αnRepresents a calibration coefficient, v, corresponding to the wind speed measuring device in each ultrasonic speed measuring device1、v2、v3…vnAnd the wind speed value corresponding to each wind speed measurer is shown.
Specifically, a fixing support is radially arranged in the straight pipe section of the nuclear power chimney, so that the gas in the nuclear power chimney flows to vertically pass through the fixing support, and data collection is facilitated. Then radially set up a plurality of speed sensor interfaces on the fixed bolster to ultrasonic wave speed sensor is connected through ultrasonic wave speed sensor's connector, with through a plurality of measuring point sample measurements, improve measurement accuracy and degree of accuracy, simultaneously, also make things convenient for ultrasonic wave speed sensor's dismantlement, improve the convenience that measuring device maintained. Set up ultrasonic wave speed sensor into a plurality of connectors, signal processing unit and wind speed measurement ware to simplify speed sensor, can also avoid the flue gas dust to adhere to simultaneously, remove dustproof measures such as installation compressed air from, be favorable to improving measurement accuracy and degree of accuracy.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An ultrasonic gas flow detection device for a nuclear power chimney is characterized by comprising a fixed support (6), a plurality of ultrasonic speed measuring devices and an upper computer; the fixed support (6) is radially arranged in the straight pipe section (7) of the nuclear power chimney;
the fixed support (6) is radially provided with a plurality of speed measuring device interfaces, and each speed measuring device interface is used for being connected with one ultrasonic speed measuring device; the ultrasonic speed measuring device is used for converting the detected ultrasonic signals into wind speed values and sending the wind speed values to the upper computer.
2. The ultrasonic gas flow detection device for the nuclear power chimney according to claim 1, wherein the ultrasonic speed measurement device comprises a connector (1), a signal processing unit (2) and an air speed measurer (4);
the connector assembly (1) is used for inserting the ultrasonic speed measuring device into the speed measuring device interface;
the wind speed measurer (4) is used for detecting an ultrasonic signal and sending the ultrasonic signal to the signal processing unit (2);
and the signal processing unit (2) is used for receiving the ultrasonic signals sent by the wind speed measurer (4), processing the ultrasonic signals into wind speed values and sending the wind speed values to the upper computer.
3. The ultrasonic gas flow detection device for the nuclear power chimney according to claim 2, wherein a positioning structure is arranged in the connector (1) and used for positioning and installing the ultrasonic speed measurement device.
4. The ultrasonic type gas flow detection device for the nuclear power chimney according to claim 2, wherein the ultrasonic speed measurement device further comprises an air speed measurer support arm (3), and an air speed measurer (4) is mounted on the air speed measurer support arm (3);
the wind speed measurer (4) is connected with the signal processing unit (2) through the wind speed measurer supporting arm (3).
5. The ultrasonic gas flow detection device for the nuclear power chimney according to claim 2, characterized in that a signal cable (5) is arranged in the fixed support (6);
and the signal processing unit (2) is used for processing the ultrasonic signals into a wind speed value and transmitting the wind speed value to an upper computer through a signal cable (5).
6. The ultrasonic nuclear power chimney gas flow detection device according to claim 1, wherein the upper computer is configured to perform weighted calibration calculation on the wind speed value after the upper computer receives the wind speed value sent by the ultrasonic velocity measurement device, obtain a chimney gas flow rate, and transmit the chimney gas flow rate to a nuclear power DCS system.
7. The ultrasonic gas flow detection device for the nuclear power chimney as recited in claim 6, wherein the weighted calibration calculation of the wind speed value comprises:
carrying out weighted calibration calculation on the wind speed values measured by all the ultrasonic speed measuring devices through a weighted calibration calculation formula to obtain the gas flow speed of the chimney; the weighted calibration calculation formula specifically includes:
wherein v represents the flow velocity of the gas in the chimney, n represents the number of the ultrasonic speed measuring devices, and alpha1、α2、α3…αnRepresents a calibration coefficient, v, corresponding to the wind speed measuring device in each ultrasonic speed measuring device1、v2、v3…vnAnd the wind speed value corresponding to each wind speed measurer is shown.
8. The ultrasonic nuclear power chimney gas flow detection device according to claim 1, wherein the nuclear power chimney straight pipe section (7) comprises a vertical section, a connecting section and a horizontal section;
the vertical section vertically penetrates through the nuclear power chimney and is connected to one end of the connecting section, the connecting section is arranged in the nuclear power chimney, and the horizontal section penetrates through one side of the nuclear power chimney and is connected to the other end of the connecting section.
9. The ultrasonic nuclear power chimney gas flow detection device according to claim 8, wherein the fixing brackets (6) are horizontally installed at intervals on the vertical section of the nuclear power chimney straight pipe section (7) and are perpendicular to the vertical section of the nuclear power chimney straight pipe section (7);
the fixing supports (6) are vertically installed at intervals on the horizontal section of the nuclear power chimney straight pipe section (7) and are perpendicular to the horizontal section of the nuclear power chimney straight pipe section (7).
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| CN202110074048.7A CN112880759A (en) | 2021-01-20 | 2021-01-20 | Ultrasonic wave type gas flow detection device for nuclear power chimney |
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| CN202110074048.7A CN112880759A (en) | 2021-01-20 | 2021-01-20 | Ultrasonic wave type gas flow detection device for nuclear power chimney |
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