CN107121178B - A kind of gas flow measurement experimental provision of flow control - Google Patents
A kind of gas flow measurement experimental provision of flow control Download PDFInfo
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- CN107121178B CN107121178B CN201710499007.6A CN201710499007A CN107121178B CN 107121178 B CN107121178 B CN 107121178B CN 201710499007 A CN201710499007 A CN 201710499007A CN 107121178 B CN107121178 B CN 107121178B
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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
- G01F1/05—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 using mechanical effects
- G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
- G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/42—Orifices or nozzles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
-
- 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
- G01F1/05—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 using mechanical effects
- G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
- G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- 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
- G01F1/05—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 using mechanical effects
- G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
- G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/46—Pitot tubes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
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- Engineering & Computer Science (AREA)
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- Educational Technology (AREA)
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- Business, Economics & Management (AREA)
- Theoretical Computer Science (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention provides a kind of gas flow measurement experimental provision of flow control, including gas flow generating device, Pitot static tube system, venturi flow meter systems, orifice flow meter systems and flow control system and runner；Gas flow generating device generates the air-flow flowed in runner, the size of the flow control system control air-flow, the Pitot static tube system, venturi flow meter systems, orifice flow meter systems are mounted on runner, for measuring the flow of air-flow in runner, the flow control system, Pitot static tube system, venturi flow meter systems, orifice flow meter systems carry out data connection with data acquisition controller respectively, the data acquisition controller is connect with data display equipment, it is characterized in that, the flow control system is the baffle and mobile device for being mounted on airflow channel end, air-flow size is controlled at a distance from channel outlet by controlling baffle.The present invention is by being arranged new-type flow control system, so that flow control is simple and convenient in measurement process, it is easy to operate.
Description
Technical field
The present invention relates to gas flow measurement experimental provisions used in a kind of gas heat exchanger and heat exchanger, belong to heat exchange neck
Domain and field of fluid mechanics.
Background technique
Gas heat exchanger causes heat transfer effect to go out when being exchanged heat, because the inlet temperature of hot fluid is uneven
It is now apparent different, and cause heat transfer effect not reach ideal situation because of the measurement error of thermal fluid flow.
Furthermore the measurement of gas flow rate and flow is a hydromechanical fundamental measurement.In experimental study and engineer application
Every field, all propose miscellaneous flow velocity measurement problem, such as determine ECU control inlet manifold air mass flow,
Measure the air speed etc. of aircraft.The flow meter applications principle and method used when usually we are measured the flow of fluid is respectively not
Identical, wherein differential pressure flowmeter is widely used, and common type has Venturi meter, orifice flowmeter, Pitot static tube
Deng.Different types of flowmeter application method and advantage are had nothing in common with each other, or even in different air-flow velocities, different measurement methods
Different precision can be presented, such as can all have flow measurement device on the blowing devices such as boiler.Compared by present apparatus measurement,
Instruction can be proposed for it, different air quantity select different flow measurement devices, obtain more accurate measurement result.Therefore
It needs to invent a kind of experimental provision for capableing of the various measurement method similarities and differences of intuitively comparing in teaching process, student is facilitated to learn.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of gas heat exchangers that can achieve ideal temperature, together
When a kind of experimental provision for capableing of the various flowmeters of composite measurement is also provided, to be used in gas heat exchanger.
Technical scheme is as follows:
A kind of gas mobility status measurement experiment device, including gas flow generating device, Pitot static tube system, venturi stream
Meter system, orifice flow meter systems and flow control system and runner；Gas flow generating device generation is flowed in runner
Air-flow, the size of the flow control system control air-flow, the Pitot static tube system, venturi flow meter systems, hole
Flowmeter system is mounted on runner, for measuring the flow of air-flow in runner, the flow control system, Pitot static tube
System, venturi flow meter systems, orifice flow meter systems carry out data connection, the data with data acquisition controller respectively
Acquisition controller is connect with data display equipment.
Preferably, along the direction of air-flow, gas flow generating device, Pitot static tube system, text are set gradually in runner
Flowmeter system, orifice flow meter systems and flow control system in mound.
Preferably, gas flow generating device includes cfentrifugal blower, tapered snorkel and airflow channel, airflow channel connection
Tapered snorkel connection, the air blower are connect with airflow path；Wherein the runner where Pitot static tube system is rectangular
Section, the runner where venturi flow meter systems, orifice flow meter systems is circle.
Preferably, the Pitot static tube system includes Pitot static tube and Pitot tube mobile device, and mobile device can be with
Move freely Pitot tube in surveyed section.
Preferably, in the venturi flow meter systems, the front end airway length of Venturi meter installation site is big
In five times of flow diameters, rear end length is greater than three times flow diameter.
Preferably, the flow control system is the baffle and mobile device for being mounted on airflow channel end, passes through control
Baffle controls air-flow size at a distance from channel outlet.
Preferably, the square passageway inner section side length of Pitot static tube system is L, and the radius of circular channel is R, then skin
Minimum range S1 >=a* ((R/2) 2+L2) (1/2) between static pressure guard system and venturi flow meter systems is held in the palm, wherein a is ginseng
Number, 22.54 < a < 32.18；
The distance between venturi flow meter systems, orifice flow meter systems S2>=b*R, wherein b is parameter, 10<b<
23。
Compared with prior art, the present invention has the advantage that:
1) present invention is by being arranged new-type flow control system, so that flow control is simple and convenient in measurement process, holds
It is easy to operate.
2) it by the way that multiple measurement flow rate devices are arranged on an experimental bench, various flow rate meter can work at the same time simultaneously,
And measurement data is shown by display device, facilitate the comparison of data, can quickly select it is different in flow rate under the small survey of error
Measure device.
3) purpose that a variety of method air-flow velocity measurements are completed on an experimental facilities is realized, it can be intuitively than less
It is easy to operate with the similarities and differences of flowmeter, facilitate teaching.
4) Pitot tube can move up and down on the guide rail of mobile device, increase the stream of the different location of measurement
Amount improves the accuracy of measurement, while convenient for the change in flow of observation different location, facilitating teaching.
5) through a large number of experiments, it is determined that the optimal distance between each measuring device avoids each measurement dress
Error caused by gas between setting disturbs increases, to significantly increase the accuracy of measurement.
Detailed description of the invention
Fig. 1 is heat exchanger structure schematic diagram of the invention；
Fig. 2 is experimental provision schematic diagram of the invention；
Fig. 3 is experimental provision overall top view of the invention；
Fig. 4 is the schematic diagram of Pitot static tube system of the present invention；
Fig. 5 is the side view of Pitot tube mobile device of the present invention；
Fig. 6 is the schematic diagram of venturi flow meter systems of the present invention；
Fig. 7 is the schematic diagram of orifice flow meter systems of the present invention；
Fig. 8 is the schematic diagram of tilting-type manometer systems and digital readout system of the present invention；
Fig. 9 is the schematic diagram of control system of the present invention；
Figure 10 is the schematic diagram of gas flow generating device of the present invention.
Appended drawing reference is as follows:
1 tapered snorkel, 2 centrifugal fans, 3 Pitot static tube systems, 4 venturi flow meter systems, 5 orifice flows
Meter, 6 tilting-type pressure gauges, 7 flow control systems, 8 Pitot tubes, 9 Pitot tube mobile devices, 10 air flues, 11 high pressure pressure-measuring pipes, 12
Low pressure pressure-measuring pipe, 13 Venturi meters, 14 high pressure pressure-measuring pipes, 15 low pressure pressure-measuring pipes, 16 tilting-type pressure gauges, 17 thermometers,
18 baffles, 19 control handles, 20 digital display equipment, 21 data acquisition controllers, 22 condensation end of heat pipe, 23 heat pipe evaporation ends, 24 is cold
Air flow channel, 25 hot gas runners, 26 convex blocks, 27 grooves.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Fig. 1 illustrates a kind of gas heat exchanger, as shown, the gas heat exchanger includes hot gas runner 25, cold sky
Flow channel 24 and heat pipe, the heat pipe include evaporation ends 23 and condensation end 22, and the evaporation ends 23 are located in hot gas runner 25,
Condensation end 22 is located in cold air flow passage 24, and 25 entrance of the hot gas runner setting temperature sensor and flow sensor are used
Enter the gas temperature and gas flow of hot gas runner in measurement, valve is arranged in 24 entrance of cold air flow passage, for controlling
System enters the cold air flows of cold air flow passage, and the heat exchanger further includes controller, the controller and temperature sensor, stream
Quantity sensor, control valve data connection, the controller according to the gas temperature and gas flow of measurement, autocontrol valve
Aperture.
The controller is that valve control, specific control mode are carried out according to the combination of gas temperature and gas flow
It is as follows: control parameter Q=(gas temperature-fiducial temperature) * gas flow, it is automatic to increase if the control parameter Q of measurement increases
Add the aperture of valve, if the control parameter Q of measurement is reduced, the automatic aperture for reducing valve.
By above-mentioned intelligent control, may be implemented to change with the gas flow temperature and changes in flow rate of hot fluid to control participation
The flow of the cold air of heat, to realize that cold cold-air vent temperature is consistent, avoid cold-air vent temperature excessively high or
It is too low, to influence using effect.
Preferably, the hot gas is boiler exhaust gas.It is used in boiler flue, low-temperature corrosion can also be avoided.It is logical
The flow for crossing control cold air, avoids exhaust gas temperature excessively high perhaps too low to cause heat waste or cause low-temperature corrosion.
Preferably, the hot gas is hot-air.
Preferably, the fiducial temperature is 20-30 DEG C.
It is found in the operative practice of heat exchanger, other not all measuring devices are suitable for measuring in heat exchanger
Flow has some measuring devices in different environment using can generate very big error, especially because gas velocity and lead
The error difference of cause is bigger, causes operational effect very poor, therefore the operational effect in order to guarantee, in different heat exchange environment
It must select suitable measuring tool.It is therefore desirable to develop a kind of new experimental provision, to test under different environment
Measuring tool error, so as to the small measuring tool of Select Error.
Fig. 2 illustrates a kind of rough schematic of new gas flow measurement experimental provision.Gas mobility status as shown in Figure 2
Measurement experiment device, including gas flow generating device, Pitot static tube system 3, venturi flow meter systems 4, orifice flowmeter system
System 5, flow control system 7 and runner；Gas flow generating device generates the air-flow flowed in runner, the flow control system
The size of 7 control air-flows, the Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5 are mounted on
On runner, for measuring the flow of air-flow in runner, the flow control system 7, Pitot static tube system 3, venturi flow
Meter systems 4, orifice flow meter systems 5 carry out data connection, the data acquisition controller with data acquisition controller 21 respectively
21 connect 20 with data display equipment.
By above-mentioned flow velocity measurement experiment device, the air-flow velocity that a variety of devices can be completed on an experimental facilities is surveyed
Amount, and each measurement data can be shown by display device, convenient for comparing to the superiority and inferiority of middle measuring tool, while also facilitating religion
It learns, student is enabled intuitively to observe a variety of different tool and speed-measuring methods of testing the speed.
Preferably, as shown in figure 9, the flow control system 7 includes the baffle 18 for being mounted on airflow channel end
And mobile device control handle 19, baffle are connected by screw rod and airflow channel outlet, change baffle by rotary control knob
With control air-flow size at a distance from channel outlet.In addition, air flow rate can also be controlled by other rational methods, such as using
Frequency conversion air pump controls air flow rate etc. in entrance.
Preferably, the experimental provision includes high-precision gas flowmeter, preferably, the high-precision gas flow
Meter is arranged between the baffle 18 of airflow channel 10 and orifice flow meter systems, and the high-precision gas flowmeter and data acquire
21 data connection of controller, the flow control system 7 can control gas flow, and be measured by high-precision gas flowmeter
Gas flow rate display equipment 20 on show.The data of the high-precision gas flowmeter measurement are correlation data, and skin support is quiet
Pressure pipe system 3, venturi flow meter systems 4, orifice flow meter systems 5 measure data respectively with high-precision gas flow measurement
The data of amount compare, and determine the size of error, and to determine suitable flowmeter, being supplied to different suitable environments makes
With.
Because of data as a comparison, high-precision gas flowmeter precision prescribed is very high, i.e. error very little, the mistake of measurement
Difference is within 0.5%, preferably, error is within 0.2%.
Preferably, the other positions in airflow path 10 can be set in high-precision gas flowmeter, such as it is arranged in gas
Between stream generating apparatus and Pitot static tube system.
Preferably, as shown in figure 3, runner is segmentation structure, altogether to guarantee to be independent of each other between each measuring device
Divide four sections, Pitot static tube system, venturi flow meter systems, orifice flow meter systems are sequentially arranged between air flue, each portion
Divide and passes through flanged joint.It is arranged by flow path segments, it is ensured that the air-flow that each runner comes out will not fill subsequent measurement
Set generation interference.
As shown in figure 3, the Pitot static tube system includes Pitot tube and tilting-type pressure gauge 6, Pitot tube connection can
Formula of inclining pressure gauge 6, the tilting-type pressure gauge 6 carry out data connection with data acquisition controller 21, pass through data acquisition control
Device 21 obtains the flow velocity of gas.
Fig. 3-4 illustrates the Pitot static tube system of device, and Pitot tube mobile device 9 is mounted on air flue wall surface, Pi Tuo
Pipe 8 can move freely under the auxiliary of mobile device 9 in measurement section, realize that multimetering takes the function of mean value.
As shown in figure 5, the mobile device 9 includes sliding block, the Pitot tube is arranged in sliding block, the sliding block
Including convex block 26, the convex block 26 is arranged in the groove 27 of air flue tube wall, and convex block 26 can move in groove 27, by convex
Moving freely for Pitot tube 8 is realized in the movement of block 26.
Preferably, taking seal approach to be sealed after the moving freely of Pitot tube 8, gas leakage is avoided.
As shown in figure 5, filling the mobile device to reduce the influence that device generates air flue interior air-flow and using in airway walls
Sliding groove is opened on face to realize transverse shifting, wherein applies lubricating oil on contact surface, and it is airtight that increase is reached while being moved easily
The purpose of property.In addition, Pitot tube can move up and down on the guide rail of mobile device, to realize the function of longitudinal movement.
Fig. 6 illustrates the venturi system of device, and Venturi meter 13 is directly installed between two sections of airflow channels, this
Place it should be noted that Venturi meter install when, preferably, front end flow development length should be greater than 5 times of diameters, rear end straight tube
Segment length should be greater than 2 times of diameters.In measurement, 11 measured values of high-tension measurement pipe of Venturi meter are larger, select relatively large
The tilting-type pressure gauge of journey, low pressure pressure-measuring pipe 12 are connected with the pressure gauge of small amount journey.
Fig. 7 illustrates the orifice flow meter systems of device, and orifice flowmeter 10 is directly installed on airflow channel, with literary mound
In flowmeter it is similar, high-tension measurement pipe 14 is connect with the tilting-type pressure gauge of larger range, low pressure pressure-measuring pipe 15 and small amount journey
Pressure gauge be connected.
If Fig. 8 illustrates the tilting-type manometer systems and digital readout system of device, shown tilting-type pressure gauge 16 divides for amount
The size of Cheng Butong two can be convenient and read flow of air, static pressure or pressure difference measured by the measuring devices such as Pitot tube.When measurement
Can by increasing the inclination angle of tilting-type pressure gauge, to obtain higher sensitivity, but simultaneously because pressure gauge range with inclination angle
Increase and reduce, therefore needs operator to be adjusted according to surveyed air flow rate and use.Thermometer 17 can work as in measurement when experiment needs
When environment temperature.
Preferably, digital display equipment 20 includes digital polling device and pressure difference transmitter, can will be surveyed by pressure difference transmitter
Pressure difference measured by amount device is changed into electric signal, send to logging and realizes the number display of measurement result.
Tilting-type pressure gauge 16 and data acquisition controller 21 carry out data connection, are obtained by data acquisition controller 21
The flow velocity of gas.
Certainly, in order to indicate convenient, Fig. 3 only illustrates a tilting-type pressure gauge.But preferably, skin support static pressure
Guard system 3, venturi flow meter systems 4, orifice flow meter systems 5 are connected from different tilting-type pressure gauges respectively, so as to
Multi-group data can be measured simultaneously.
Figure 10 illustrates a kind of gas flow generating device of air current measurer, and centrifugal fan 2 and tapered snorkel 1 connect
It connects, is supplied by one section 3 of air flue to whole device.Airflow channel connects tapered snorkel 1, the blower 2 and airflow path
Connection.
Preferably, wherein the runner where Pitot static tube system is square-section, venturi flow meter systems, orifice plate
Runner where flowmeter system is circle.
It is found in practice, for Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5, mutually
Between must be greater than certain distance, otherwise will lead to from previous measuring tool come out gas do not flow sufficiently, thus
Lead to measurement result misalignment, it is therefore necessary to a distance is set between each measuring tool, so that the gas in runner fills
It shunts and moves, to guarantee the accuracy of measurement.
Experiment discovery, Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5, flow control system
The distance between system 7 is related to runner caliber.Under normal circumstances, the distance between each measuring tool is more remoter longer, still
In view of cost problem, space problem and in view of distance is longer, lead to the error problem of gas leakage and generation, therefore this
Invention through a large number of experiments, has obtained optimal range formula.
Runner where Pitot static tube system is square section, venturi flow meter systems, orifice flow meter systems
The runner at place is circle, and in such cases, the square passageway inner section side length of Pitot static tube system is L, circular channel
Radius is R, then the minimum range S1 between Pitot static tube system and venturi flow meter systems >=a* ((R/2)2+L2)(1/2),
Wherein a is parameter, 22.54 < a < 32.18.
Preferably, 35.34* ((R/2)2+L2)(1/2)≤ S1≤46.32* ((R/2)2+L2)(1/2)。
Preferably, a is with (R/2)2+L2Increase and increase.Preferably, a is with (R/2)2+
L2Increase and increased amplitude is increasing.
It is found through experiments that, the amplitude of a is with (R/2)2+L2Continuous variation, it is more accurate to will lead to result, greatly
Improve the accuracy of measurement data.
Preferably, 25.52 < a < 28.24.
The distance between venturi flow meter systems, orifice flow meter systems S2>=b*R, wherein b is parameter, 10<b<
23.Preferably, the b increases with the increase of R.Preferably, the b with the increase of R increased amplitude
It is increasing.
It is found through experiments that, the amplitude of b constantly changes with R, and it is more accurate to will lead to result, greatly improves survey
Measure the accuracy of data.
Preferably, 15.3 <b < 18.2.
The distance between orifice flow meter systems and flow control system 7 S3>=c*R, wherein c is parameter, 4<c<13.Make
To be preferred, the c increases with the increase of R.Preferably, the c with the increase of R and increased amplitude increasingly
Greatly.
It is found through experiments that, the amplitude of c constantly changes with R, and it is more accurate to will lead to result, greatly improves survey
Measure the accuracy of data.
Preferably, 7.2 < c < 9.2.
Adjacent Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5, flow control system 7 it
Between distance be with the distance between the position of beginning of the last position of the system on runner and next system, as excellent
Choosing, Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5, flow control system 7 are solid by flange
It is scheduled on runner, the distance of the adjacent system is between adjacent system flange at tail end and next system beginning flange
Distance.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (3)
1. a kind of gas mobility status measurement experiment device, including gas flow generating device, Pitot static tube system, venturi flow
Meter systems, orifice flow meter systems and flow control system and runner；Gas flow generating device generates the gas flowed in runner
Stream, the size of the flow control system control air-flow, the Pitot static tube system, venturi flow meter systems, orifice plate
Flowmeter system is mounted on runner, for measuring the flow of air-flow in runner, the flow control system, Pitot static tube system
System, venturi flow meter systems, orifice flow meter systems carry out data connection with data acquisition controller respectively, and the data are adopted
Collection controller is connect with data display equipment, which is characterized in that the flow control system is to be mounted on airflow channel end
Baffle and mobile device control air-flow size by controlling baffle at a distance from channel outlet；
Along the direction of air-flow, gas flow generating device, Pitot static tube system, Venturi meter system are set gradually in runner
System, orifice flow meter systems and flow control system；
Runner where Pitot static tube system is square-section, where venturi flow meter systems, orifice flow meter systems
Runner is circle；
The square runner inner section side length of Pitot static tube system is L, and the radius of circular flow channel is R, then Pitot static tube system
Minimum range S1 >=a* ((R/2) between system and venturi flow meter systems2+L2)(1/2), wherein a is parameter, 22.54 < a <
32.18；
The distance between venturi flow meter systems, orifice flow meter systems S2>=b*R, wherein b is parameter, 10<b<23.
2. gas mobility status measurement experiment device as described in claim 1, which is characterized in that the flow control system
Baffle and mobile device control handle including being mounted on airflow channel end, baffle are connected by screw rod and airflow channel outlet
It connects, baffle is changed by rotary control knob and controls air-flow size at a distance from channel outlet.
3. gas mobility status measurement experiment device as described in claim 1, which is characterized in that the experimental provision includes height
Precision gas flowmeter, the high-precision gas flowmeter are arranged between the baffle of airflow channel and orifice flow meter systems,
The high-precision gas flowmeter and data acquisition controller data connection, the flow control system can control gas stream
Amount, and the gas flow rate measured by high-precision gas flowmeter is shown on the display device；
High-precision gas flowmeter requires the error of measurement within 0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499007.6A CN107121178B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision of flow control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499007.6A CN107121178B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision of flow control |
| CN201610108772.6A CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610108772.6A Division CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
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| Publication Number | Publication Date |
|---|---|
| CN107121178A CN107121178A (en) | 2017-09-01 |
| CN107121178B true CN107121178B (en) | 2019-03-29 |
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| CN201710499007.6A Expired - Fee Related CN107121178B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision of flow control |
| CN201710499096.4A Expired - Fee Related CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
| CN201610108772.6A Expired - Fee Related CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
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| CN201710499096.4A Expired - Fee Related CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
| CN201610108772.6A Expired - Fee Related CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107255616A (en) * | 2017-06-08 | 2017-10-17 | 国网浙江省电力公司电力科学研究院 | A kind of devices and methods therefor for simulating water screen tube operation conditions in boiler |
| CN109882878B (en) * | 2018-04-14 | 2020-04-28 | 青岛科技大学 | Intelligent flue gas waste heat utilization and flue gas pollutant treatment system thereof |
| JP7038206B2 (en) * | 2018-05-31 | 2022-03-17 | 日本たばこ産業株式会社 | Flavor generator |
| CN108682239A (en) * | 2018-08-16 | 2018-10-19 | 重庆市渝北区发明创新服务协会 | A kind of high school physics active experiment platform convenient for adjusting |
| CN110470859B (en) * | 2019-09-24 | 2021-04-20 | 西北工业大学 | Method for measuring direction and speed of airflow in air system |
| CN111122395B (en) * | 2019-12-04 | 2022-05-13 | 天津大学 | Mobile supersonic nozzle continuous measurement system |
| CN113585982B (en) * | 2021-08-27 | 2022-06-17 | 重庆力劲机械有限公司 | Oil pipe with pressure flow and temperature detection functions |
| CN117605444B (en) * | 2024-01-22 | 2024-04-12 | 西安思坦仪器股份有限公司 | High-temperature intelligent water distributor |
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| AU2011284292B2 (en) * | 2010-07-30 | 2016-04-07 | Ecolab Usa Inc. | Apparatus, method and system for calibrating a liquid dispensing system |
| CN102455196B (en) * | 2010-10-27 | 2014-01-01 | 中国北车集团大连机车研究所有限公司 | Air test system used for service test of cooling device |
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| CN104952324B (en) * | 2015-06-12 | 2018-01-02 | 浙江大学 | A kind of Venturi meter experimental provision for possessing synchronous flow digital display |
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- 2016-02-27 CN CN201710499007.6A patent/CN107121178B/en not_active Expired - Fee Related
- 2016-02-27 CN CN201710499096.4A patent/CN107270982B/en not_active Expired - Fee Related
- 2016-02-27 CN CN201610108772.6A patent/CN105590538B/en not_active Expired - Fee Related
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| CN86203508U (en) * | 1986-05-23 | 1987-09-09 | 西安交通大学 | Modular double-phase flow-dryness meter consisting of throttling element and porous kinetic pressure probe |
| CN2033529U (en) * | 1988-01-06 | 1989-03-01 | 成都科技大学 | Multifunctional experimental facility for enginecring hydro-mechanics system |
| CN202584505U (en) * | 2012-03-31 | 2012-12-05 | 西安理工大学 | Test instrument for venturi and orifice plate flowmeters |
| CN104599567A (en) * | 2015-02-02 | 2015-05-06 | 江苏农林职业技术学院 | Multifunctional fluid mechanics experimental device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105590538B (en) | 2017-07-14 |
| CN105590538A (en) | 2016-05-18 |
| CN107270982A (en) | 2017-10-20 |
| CN107270982B (en) | 2019-07-26 |
| CN107121178A (en) | 2017-09-01 |
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