CN214951687U - Flow disc flow measuring device based on mass flow feedback adjustment - Google Patents
Flow disc flow measuring device based on mass flow feedback adjustment Download PDFInfo
- Publication number
- CN214951687U CN214951687U CN202121088556.2U CN202121088556U CN214951687U CN 214951687 U CN214951687 U CN 214951687U CN 202121088556 U CN202121088556 U CN 202121088556U CN 214951687 U CN214951687 U CN 214951687U
- Authority
- CN
- China
- Prior art keywords
- flow
- mass flow
- controller
- gas
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Flow Control (AREA)
- Details Of Flowmeters (AREA)
- Measuring Volume Flow (AREA)
Abstract
The utility model provides a flow dish flow measuring device based on mass flow feedback adjustment, including gas pressure adjusting device, mass flow terminal, mass flow controller, temperature sensor, differential pressure gauge, barometer and controller, the inlet end of mass flow terminal is connected to the gas outlet end of gas pressure adjusting device, and the inlet end of mass flow controller is connected to the gas outlet end of mass flow terminal, and the gas outlet end of mass flow controller is used for connecting the flow dish; the temperature sensor is used for detecting the temperature of the airflow passing through the flow rate disc; the pressure difference meter is connected with the air outlet end of the mass flow controller and is used for detecting the pressure difference at the two ends of the flow disc; the atmospheric pressure meter is used for detecting the atmospheric pressure of the environment; the mass flow controller, the mass flow terminal, the differential pressure gauge and the temperature sensor are all connected with the controller to feed back data and receive control signals. The device utilizes the gas mass conservation in the pipeline to and the characteristics of mass flow and volume flow conversion under the same environmental condition measure, and stability is better, and the precision is higher.
Description
Technical Field
The utility model relates to a tobacco industry gas flow detection area, specific theory has related to a flow dish flow measuring device based on mass flow feedback adjusts.
Background
The special air permeability flow tray for tobacco (hereinafter referred to as flow tray) is a standard instrument for calibrating paper air permeability measuring instruments. Adjusting the air permeability of cigarette paper can affect the release amount of harmful components, the harmfulness index and the sensory quality of cigarettes. Therefore, the accuracy of the flow rate plate measurement result is important. The measuring mode of the flow disc is specified in JJG (tobacco) 18-2012 verification regulations for the special air permeability flow disc for tobacco, under the standard environmental condition, the pressure difference at two ends of the flow disc is controlled to be 1kPa, and the flow flowing through the flow disc is the flow value of the flow disc. The calibration result of the flow rate disc is a flow rate value, and the measurement mode of the flow rate disc is mainly divided into two modes: volumetric flow measurement and mass flow measurement.
At present, the calibration of the flow rate disk is performed by using the volume flow rate, but the volume flow rate of the fluid is easily influenced by environmental conditions, such as the ambient temperature and the atmospheric pressure, and the error caused by more environmental factors is easily introduced when the flow rate calculation is performed.
In addition, the existing measurement mode adopts a needle valve to adjust the differential pressure of 1kPa at two ends of the flow disc, and the needle valve needs to be manually adjusted frequently to keep the differential pressure of 1kPa at two ends of the flow disc under the condition of unstable airflow state, so that the automation and the intellectualization of laboratory equipment instruments are not convenient to realize.
In order to solve the above problems, people are always seeking an ideal technical solution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of prior art to a flow dish flow measuring device based on mass flow feedback adjusts that stability is good, the precision is high, the environmental error influences for a short time is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a flow disc flow measuring device based on mass flow feedback adjustment comprises a gas pressure adjusting device, a mass flow terminal, a mass flow controller, a temperature sensor, a differential pressure meter, an atmospheric pressure meter and a controller, wherein the gas inlet end of the gas pressure adjusting device is used for connecting compressed air, the gas outlet end of the gas pressure adjusting device is connected with the gas inlet end of the mass flow terminal, the gas outlet end of the mass flow terminal is connected with the gas inlet end of the mass flow controller, and the gas outlet end of the mass flow controller is used for being connected with a special air permeability flow disc for tobacco; the temperature sensor is used for detecting the temperature of the gas passing through the special air permeability flow disc for the tobacco; the pressure difference meter is connected with the air outlet end of the mass flow controller and is used for detecting the pressure difference at two ends of the special air permeability flow disc for the tobacco; the atmospheric pressure meter is used for detecting the atmospheric pressure of the environment; the mass flow controller, the mass flow terminal, the differential pressure gauge and the temperature sensor are connected with the controller to feed back data and receive control signals.
Basically, flow dish flow measuring device based on mass flow feedback adjusts sets up under stable atmospheric pressure environment.
Basically, the gas pressure regulating device, the mass flow terminal and the mass flow controller are communicated through a closed pipeline.
Basically, the controller is a PC.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses the mass flow homoenergetic of each point equals in utilizing the pipeline, and fluid mass flow is one not along with the space, the characteristics of the volume that changes of temperature and pressure, introduce mass flow measurement, environmental condition's influence when reducing flow calculation, and the feedback regulation that adopts mass flow controller realizes the control to flow dish both ends pressure differential, the controller reunion mass flow value, the temperature value, atmospheric pressure value and pressure differential count value, the volume flow who obtains the flow dish through the mode of conversion, because the parameter of taking into account is more, the precision is higher, for direct measurement volume flow, it is littleer to receive environmental condition's influence.
Drawings
Fig. 1 is a schematic diagram of the flow rate measuring device of the present invention based on mass flow rate feedback regulation.
In the figure: 1. a source of compressed air; 2. a gas pressure regulating device; 3. a mass flow terminal; 4. a mass flow controller; 5. an atmospheric pressure gauge; 6. a temperature sensor; 7. a differential pressure gauge; 8, a PC machine; 9. air permeability flow disc clamp special for tobacco.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in fig. 1, a flow rate disk flow rate measuring device based on mass flow rate feedback regulation comprises a gas pressure regulating device 2, a mass flow rate terminal 3, a mass flow rate controller 4, a temperature sensor 6, a differential pressure meter 7, an atmospheric pressure meter 5 and a PC 8, wherein the gas inlet end of the gas pressure regulating device 2 is used for connecting a compressed air source 1, the gas outlet end of the gas pressure regulating device 2 is connected with the gas inlet end of the mass flow rate terminal 3, and the gas pressure regulating device 2 is used for regulating the gas pressure flowing into a pipeline.
The air outlet end of the mass flow terminal 3 is connected with the air inlet end of the mass flow controller 4, and the mass flow terminal is used for measuring mass flow in the pipeline.
The air outlet end of the mass flow controller 4 is used for being connected with the special air permeability flow disc 9 for the tobacco, and the mass flow controller 4 is used for controlling the flow passing through the special air permeability flow disc 9 for the tobacco and controlling the pressure difference of the two sections.
The special air permeability flow disc 9 for tobacco is a piece to be measured.
The temperature sensor 6 is used for detecting the gas temperature passing through the special air permeability flow disc for the tobacco and is used for subsequent calculation.
And the differential pressure meter 7 is connected with the air outlet end of the mass flow controller and is used for detecting the differential pressure at two ends of the air permeability flow disc special for tobacco, and the differential pressure refers to the differential pressure data at two ends of the flow disc.
The barometric pressure gauge 5 is used for detecting the atmospheric pressure of the environment for subsequent calculation.
The mass flow controller 4, the mass flow terminal 3, the differential pressure gauge 7 and the temperature sensor 6 are all connected with the PC 8 so as to feed back data and receive control signals, and one end of the PC 8 is used for inputting instructions for controlling each component, acquiring feedback data and carrying out corresponding calculation according to the feedback data.
Wherein, flow dish flow measuring device based on mass flow feedback adjusts sets up under stable atmospheric pressure environment, like under 1 standard atmospheric pressure environment, the temperature is normal room temperature, gas pressure adjusting device 2, mass flow terminal 3 and mass flow controller 4 all through inclosed pipeline intercommunication, avoid leaking gas and cause flow loss.
In the actual use process, the tobacco air permeability flow disc clamp further comprises a clamp used for installing the special air permeability flow disc for tobacco, an internal airflow channel formed after the clamp is locked only passes through the special air permeability flow disc for tobacco, one end of the internal airflow channel is connected with the outlet end of the mass flow controller, the other end of the internal airflow channel is communicated with the atmosphere environment, the internal space is a sealed space except the inlet and the outlet, the flow loss is avoided, and all flow can pass through the flow disc.
The working process is as follows:
connecting the air inlet end of the special air permeability flow disc for the tobacco to the outlet end of the mass flow controller, connecting the other end of the special air permeability flow disc for the tobacco to the atmosphere, and connecting the air inlet end of the air pressure regulating device to a compressed air source to introduce compressed air;
adjusting a gas pressure adjusting device to adjust and stabilize pressure, observing a differential pressure meter, controlling a mass flow controller to adjust mass flow when the numerical value of the differential pressure meter exceeds a set value, stabilizing the reading of the differential pressure meter at the set value, and keeping for a period of time, such as 1-5 minutes, wherein in the embodiment, the set value of the differential pressure meter is 1000Pa +/-5 Pa;
measuring mass flow Q through a mass flow terminalmA measured value T of the temperature sensor, a measured value Vp of the differential pressure gauge and a measured value p of the atmospheric pressure gauger；
Since the mass flow in the pipe does not change with the change in space, the mass flow data at the mass flow terminals is also the mass flow data through the flow dial.
Mass flow rate QmAnd volume flow rate QvThe relation of (1):
Qm＝ρ×QV………………………(1)
for an ideal gas, ρ is related to temperature and pressure, i.e.:
in the formula:
--ρnis the gas density in the standard state;
--Tnis the gas thermodynamic temperature in the standard state;
--pnis the absolute pressure of the gas at standard conditions;
- ρ is the gas actual density;
-p is the absolute pressure of the gas;
wherein p ═ pr-Vp；
Then, after the formula (2) is sleeved into the formula (1), the volume flow flowing through the two ends of the flow disc is calculated as follows:
and finally, judging whether the volume flow data is matched with the standard data.
The method and the device have the advantages that the measuring position is changed by utilizing the characteristic that the mass flow can not change along with the change of space, temperature and pressure in the pipeline, so that the flow can be acquired more easily and accurately, meanwhile, the key parameters in conversion operation are sequentially acquired according to the principle that the mass flow and the gas flow can be converted mutually, various influence factors in the environment are fully considered, and the accuracy of volume flow calculation is finally ensured.
Compared with a mode of directly acquiring the volume flow, the method has the advantages of lower acquisition difficulty, lower interference of the environment in the acquisition process, and higher accuracy and stability.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (4)
1. The utility model provides a flow dish flow measuring device based on mass flow feedback adjusts which characterized in that: the device comprises a gas pressure adjusting device, a mass flow terminal, a mass flow controller, a temperature sensor, a differential pressure gauge, an atmospheric pressure gauge and a controller, wherein the gas inlet end of the gas pressure adjusting device is used for connecting compressed air, the gas outlet end of the gas pressure adjusting device is connected with the gas inlet end of the mass flow terminal, the gas outlet end of the mass flow terminal is connected with the gas inlet end of the mass flow controller, and the gas outlet end of the mass flow controller is used for connecting a special air permeability flow disc for tobacco; the temperature sensor is used for detecting the temperature of the gas passing through the special air permeability flow disc for the tobacco; the pressure difference meter is connected with the air outlet end of the mass flow controller and is used for detecting the pressure difference at two ends of the special air permeability flow disc for the tobacco; the atmospheric pressure meter is used for detecting the atmospheric pressure of the environment; the mass flow controller, the mass flow terminal, the differential pressure gauge and the temperature sensor are connected with the controller to feed back data and receive control signals.
2. The mass flow feedback regulation-based flow disk flow measurement device of claim 1, wherein: the controller is a PC.
3. A mass flow feedback regulation-based flow disk flow measurement device as claimed in claim 1 or 2, wherein: the flow disc flow measuring device based on mass flow feedback adjustment is arranged under a stable atmospheric pressure environment.
4. A mass flow feedback regulation-based flow disk flow measurement device as defined in claim 3, wherein: the gas pressure adjusting device, the mass flow terminal and the mass flow controller are communicated through a closed pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088556.2U CN214951687U (en) | 2021-05-20 | 2021-05-20 | Flow disc flow measuring device based on mass flow feedback adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121088556.2U CN214951687U (en) | 2021-05-20 | 2021-05-20 | Flow disc flow measuring device based on mass flow feedback adjustment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214951687U true CN214951687U (en) | 2021-11-30 |
Family
ID=79061911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121088556.2U Active CN214951687U (en) | 2021-05-20 | 2021-05-20 | Flow disc flow measuring device based on mass flow feedback adjustment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214951687U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514135A (en) * | 2021-05-20 | 2021-10-19 | 中国烟草总公司郑州烟草研究院 | Flow disc flow measuring device and method based on mass flow feedback adjustment |
| CN113514135B (en) * | 2021-05-20 | 2024-06-28 | 中国烟草总公司郑州烟草研究院 | Flow disc flow measurement device and method based on mass flow feedback adjustment |
-
2021
- 2021-05-20 CN CN202121088556.2U patent/CN214951687U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514135A (en) * | 2021-05-20 | 2021-10-19 | 中国烟草总公司郑州烟草研究院 | Flow disc flow measuring device and method based on mass flow feedback adjustment |
| CN113514135B (en) * | 2021-05-20 | 2024-06-28 | 中国烟草总公司郑州烟草研究院 | Flow disc flow measurement device and method based on mass flow feedback adjustment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100590399C (en) | Flow rate sensor calibrating method in medical respiration mechanics module | |
| CN104792458A (en) | Wireless pressure data acquiring instrument calibrating device and method thereof | |
| CN109238936A (en) | A kind of compensation ventilation rate master bar calibrating installation and its calibration method | |
| CN112229455B (en) | Suction resistance standard rod measuring method capable of adjusting volume flow | |
| CN209014432U (en) | A kind of compensation ventilation rate master bar calibrating installation | |
| CN220437536U (en) | Ventilation rate calibration device suitable for unmanned | |
| CN214951687U (en) | Flow disc flow measuring device based on mass flow feedback adjustment | |
| CN219015429U (en) | Mass flowmeter calibrating device | |
| CN206710036U (en) | For the equipment for the air-tightness for detecting aircraft air condition pipeline | |
| CN101876593A (en) | Equipment for testing liquidity of pulse valve | |
| CN106813737B (en) | Flow measurement device, and method and test system for acquiring optimal response time of flow measurement device | |
| CN113514135B (en) | Flow disc flow measurement device and method based on mass flow feedback adjustment | |
| CN113514135A (en) | Flow disc flow measuring device and method based on mass flow feedback adjustment | |
| CN208805264U (en) | Electronics soap-film flow automatic calibrator | |
| CN110044798A (en) | Check device and check method during an a kind of step and compensation ventilation rate master bar | |
| CN113776628B (en) | Laminar flow flowmeter testing arrangement of high low pressure and temperature adjustable | |
| CN112229465B (en) | Suction resistance standard rod measuring system capable of adjusting volume flow | |
| CN105043665B (en) | A kind of pressure detection system and its calibration method with automatic calibration function | |
| CN214278084U (en) | Air quality detection system | |
| CN201417210Y (en) | Flow capacity testing device for impulse valve | |
| CN209432347U (en) | A kind of flow type micro-pressure sensor calibration equipment | |
| CN209589904U (en) | A kind of high-precision gas sensor array detection device | |
| CN215297026U (en) | Device for measuring smoke resistance standard rod for cigarettes by positive pressure method and device for measuring ventilation rate standard part for cigarettes | |
| CN213749512U (en) | Measuring device of special ventilation rate standard rod of tobacco | |
| CN106896206B (en) | A kind of BOD analyzer calibrating installation and application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |