CN105590538B - A kind of gas flow measurement experimental provision - Google Patents
A kind of gas flow measurement experimental provision Download PDFInfo
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- CN105590538B CN105590538B CN201610108772.6A CN201610108772A CN105590538B CN 105590538 B CN105590538 B CN 105590538B CN 201610108772 A CN201610108772 A CN 201610108772A CN 105590538 B CN105590538 B CN 105590538B
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- 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
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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
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- 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
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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
- G01F1/44—Venturi tubes
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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
- G01F1/46—Pitot tubes
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- 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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Abstract
A kind of gas heat exchanger and gas mobility status measurement experiment device, the gas heat exchanger includes hot gas runner, cold air flow passage and heat pipe, the heat pipe includes evaporation ends and condensation end, the evaporation ends are located at hot gas runner, condensation end is located at cold air flow passage, the hot gas flow channel entry point sets temperature sensor and flow sensor, enter the gas temperature and gas flow of hot gas runner for measuring, the cold air flow passage entrance sets valve, for controlling the cold air flows into cold air flow passage, the heat exchanger also includes controller, the controller and temperature sensor, flow sensor, control valve data cube computation, the controller is according to the gas temperature and gas flow of measurement, the aperture of autocontrol valve.The gas flow into heat exchanger is automatically controlled by the temperature and flow velocity of the hot gas of measurement, so as to realize automatically controlling for cold fluid output temperature, other gas mobility status measurement experiment device can apply to teaching, intuitively contrast the difference of different metering systems, convenient teaching.
Description
Technical field
The present invention relates to the gas flow measurement experimental provision used in a kind of gas heat exchanger and heat exchanger, belong to heat exchange neck
Domain and field of fluid mechanics.
Background technology
Gas heat exchanger is when being exchanged heat, because the inlet temperature of hot fluid is uneven and causes heat transfer effect to go out
It is now obvious different, and cause heat transfer effect to be not reaching to preferable situation because of the measurement error of thermal fluid flow.
In addition the measurement of gas flow rate and flow is a hydromechanical fundamental measurement.In experimental study and engineer applied
Every field, all propose miscellaneous flow velocity measurement problem, for example determine ECU control inlet manifold air mass flow,
Determine air speed of aircraft etc..The flow meter applications principle and method used when generally our flows to fluid are measured is each not
Identical, wherein differential pressure flowmeter is widely used, and conventional species 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 metering systems
Different precision can be presented, can all there is flow measurement device on blowing device such as in boiler.Compared by present apparatus measurement,
Instruction can be proposed for it, different air quantity select different flow measurement devices, obtain more accurately measurement result.Therefore
Need to invent a kind of experimental provision for being capable of the various measuring method similarities and differences of intuitively comparing in teaching process, facilitate Students ' Learning.
The content of the invention
Regarding to the issue above, the gas heat exchanger of ideal temperature can be reached it is an object of the invention to provide a kind of, together
When a kind of experimental provision for being capable 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 heat exchanger, the gas heat exchanger includes hot gas runner, cold sky
Flow channel and heat pipe, the heat pipe include evaporation ends and condensation end, and the evaporation ends are located at hot gas runner, and condensation end is located at cold
Air flow channel, it is characterised in that the hot gas flow channel entry point sets temperature sensor and flow sensor, enters for measuring
The gas temperature and gas flow of hot gas runner, the cold air flow passage entrance set valve, for controlling to enter cold air
The cold air flows of runner, the heat exchanger also includes controller, the controller and temperature sensor, flow sensor, control
Valve data cube computation processed, the controller is according to the gas temperature and gas flow of measurement, the aperture of autocontrol valve.
It is preferred that, Q=（Gas temperature-fiducial temperature）* gas flow, automatic to increase valve if the Q of measurement increases
Aperture, if the Q of measurement is reduced, the aperture of automatic reduction valve.
It is preferred that, the fiducial temperature is 20-30 DEG C.
A kind of gas mobility status measurement experiment device, including gas flow generating device, Pitot static tube system, venturi stream
Gauge system, orifice flow meter systems and flow control system and runner；Gas flow generating device produces what is flowed in runner
Air-flow, the flow control system controls the size of air-flow, described Pitot static tube system, venturi flow meter systems, hole
Flowmeter system is arranged on runner, the flow for measuring air-flow in runner, the flow control system, Pitot static tube
System, venturi flow meter systems, orifice flow meter systems carry out data cube computation, the data with data acquisition controller respectively
Acquisition controller is connected with data display equipment.
It is preferred that, 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.
It is preferred that, gas flow generating device includes cfentrifugal blower, tapered snorkel and gas channel, gas channel connection
Tapered snorkel is connected, and described air blower is connected with airflow path；Runner wherein where Pitot static tube system is square
Section, the runner where venturi flow meter systems, orifice flow meter systems is circle.
It is preferred that, the Pitot static tube system includes Pitot static tube and Pitot tube mobile device, and mobile device can be with
Pitot tube is set to be moved freely in surveyed section.
It is preferred that, in described 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 more than three times flow diameter.
It is preferred that, the flow control system is the baffle plate and mobile device installed in gas channel end, passes through control
The distance of baffle plate and channel outlet controls air-flow size.
It is preferred that, the square passageway inner section length of side of Pitot static tube system is L, and the radius of circular channel is R, then skin
Hold in the palm the minimum range S1 between static pressure guard system and venturi flow meter systems>=a* ((R/2) 2+L2) (1/2), wherein a are ginsengs
Number, 22.54<a<32.18；
The distance between venturi flow meter systems, orifice flow meter systems S2>=b*R, wherein b are parameter, 10<b<23.
Compared with prior art, the present invention has the advantage that：
1）The gas flow into heat exchanger is automatically controlled by the temperature and flow velocity of the hot gas of measurement, so as to realize
Cold fluid output temperature is automatically controlled.
2）By setting multiple measurement flow rate devices on an experimental bench, various flow rate meter it can work simultaneously simultaneously,
And measurement data is shown by display device, facilitate the contrast of data, can quickly select it is different in flow rate under the small survey of error
Measure device.
3）The purpose that a variety of method air-flow velocity measurements are completed on an experimental facilities is realized, can be intuitively than less
It is simple to operate with the similarities and differences of flowmeter, convenient teaching.
4）Pitot tube can move up and down on the guide rail of mobile device, add the stream of the diverse location of measurement
Amount, improves the degree of accuracy of measurement, while it is easy to observe the change in flow of diverse location, convenient teaching.
5）Pass through substantial amounts of experiment, it is determined that the optimal distance between each measurement apparatus, it is to avoid each measurement dress
Error increase caused by gas disturbance between putting, so as to significantly increase the accuracy of measurement.
Brief description of the drawings
Fig. 1 is the heat exchanger structure schematic diagram of the present invention；
Fig. 2 is the experimental provision schematic diagram of the present invention
Fig. 3 is the overall top view of experimental provision of the present 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 of the present invention and digital readout system；
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.
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 baffle plates, 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 projections, 27 grooves.
Embodiment
The embodiment to the present invention is described in detail below in conjunction with the accompanying drawings.
Fig. 1 illustrates a kind of gas heat exchanger, as illustrated, 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 the entrance of hot gas runner 25 sets temperature sensor and flow sensor, uses
Enter the gas temperature and gas flow of hot gas runner in measurement, the entrance of cold air flow passage 24 sets valve, for controlling
System enters the cold air flows of cold air flow passage, and the heat exchanger also includes controller, the controller and temperature sensor, stream
Quantity sensor, control valve data cube computation, the controller according to the gas temperature and gas flow of measurement, autocontrol valve
Aperture.
Described controller is that Valve controlling, 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, automatic to increase if the control parameter Q of measurement increases
Plus the aperture of valve, if the control parameter Q of measurement is reduced, the aperture of automatic reduction valve.
Pass through above-mentioned Based Intelligent Control, it is possible to achieve control participation to change with the gas flow temperature and changes in flow rate of hot fluid
Heat cold air flow, so as to realize that cold air exit temp is consistent, it is to avoid cold-air vent temperature it is too high or
It is too low, so as to influence using effect.
Preferably, the hot gas is boiler exhaust gas.Used in boiler flue, low-temperature corrosion can also be avoided.It is logical
Cross the flow of control cold air, it is to avoid exhaust gas temperature is too high or too low, so as 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.
Found in the operative practice of heat exchanger, other not all measurement apparatus are suitable for measuring in heat exchanger
Flow, has the use in different environment of some measurement apparatus to produce very big error, especially because gas velocity and lead
The error difference of cause is bigger, causes operational effect very poor, therefore for the operational effect ensured, in different heat exchange environment
Suitable survey tool must be selected.It is therefore desirable to develop a kind of new experimental provision, to test under different environment
Survey tool error, so as to the small survey 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 produces the air-flow flowed in runner, the flow control system
The size of 7 control air-flows, described Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5 are arranged on
On runner, the flow for measuring 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 cube computation, the data acquisition controller with data acquisition controller 21 respectively
21 are connected 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, it is easy to compare the quality to middle survey tool, while being also convenient for religion
Learn so that student can intuitively observe a variety of instrument and speed-measuring methods of testing the speed.
Preferably, as shown in figure 9, described flow control system 7 includes the baffle plate 18 installed in gas channel end
And mobile device control handle 19, baffle plate is connected by the outlet of screw rod and gas channel, and baffle plate is changed by rotary control knob
Air-flow size is controlled with the distance of channel outlet.In addition, also air flow rate can be controlled by other rational methods, for example, use
Frequency conversion air pump controls air flow rate etc. at import.
Preferably, the experimental provision includes high-precision gas flowmeter, preferably, the high-precision gas flow
Meter is arranged between the baffle plate 18 of gas channel 10 and orifice flow meter systems, the high-precision gas flowmeter and data acquisition
The data cube computation of controller 21, the flow control system 7 can control gas flow, and be measured by high-precision gas flowmeter
Gas flow rate shown on display device 20.The data of the high-precision gas flowmeter measurement are correction 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 are contrasted, and determine the size of error, and to determine suitable flowmeter, there is provided make to different suitable environments
With.
Because data, therefore high-precision gas flowmeter precision prescribed is very high as a comparison, i.e. error very little, the mistake of measurement
Difference is within 0.5%, preferably, error is within 0.2%.
Preferably, high-precision gas flowmeter can be arranged on the other positions of airflow path 10, for example, it is arranged on gas
Between stream generating apparatus and Pitot static tube system.
Preferably, as shown in figure 3, to ensure to be independent of each other between each measurement apparatus, runner is segmentation structure, altogether
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 pass through flange connection.Set by flow path segments, it is ensured that the air-flow that each runner comes out will not be filled to measurement below
Put generation interference.
As shown in figure 3, described 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 carries out data cube computation with data acquisition controller 21, passes 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 arranged on air flue wall, Pi Tuo
Pipe 8 can be moved freely under the auxiliary of mobile device 9 in measurement section, realize that multimetering takes the function of average.
As shown in figure, 5, described mobile device 9 includes sliding block, and described Pitot tube is arranged in sliding block, described cunning
Block includes projection 26, and the projection 26 is arranged in the groove 27 of air flue tube wall, and projection 26 can be moved in groove 27, be passed through
Moving freely for Pitot tube 8 is realized in the movement of projection 26.
Preferably, taking seal approach to be sealed after the moving freely of Pitot tube 8, it is to avoid gas leakage.
As shown in figure 5, to reduce the influence that device is produced to air flue interior air-flow, filling the mobile device and using in airway walls
Sliding groove is opened on face to realize transverse shifting, wherein lubricating oil is applied on contact surface, reaches that increase is airtight while being moved easily
The purpose of property.In addition, Pitot tube can be moved up and down on the guide rail of mobile device, to realize the function of vertically moving.
Fig. 6 illustrates the venturi system of device, and Venturi meter 13 is directly installed between two sections of gas channels, this
Place it should be noted that Venturi meter installation 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 is 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 gas channel, with literary mound
In flowmeter it is similar, high-tension measurement pipe 14 is connected with the tilting-type pressure gauge of larger range, low pressure pressure-measuring pipe 15 and small amount journey
Pressure gauge be connected.
As Fig. 8 illustrates the tilting-type manometer systems and digital readout system of device, shown 16 points of tilting-type pressure gauge is amount
Cheng Butong size two, can conveniently read flow of air, static pressure or the pressure difference measured by the measurement apparatus such as Pitot tube.During measurement
Can be by increasing the inclination angle of tilting-type pressure gauge, to obtain higher sensitivity, but simultaneously because pressure gauge range is with inclination angle
Increase and reduce, therefore need operator to be used according to the regulation of surveyed air flow rate.Thermometer 17 can be measured when experiment needs works as
When environment temperature.
Preferably, digital display equipment 20 includes digital polling device and pressure difference transmitter, it will can be surveyed by pressure difference transmitter
Pressure difference measured by amount device is changed into electric signal, delivers to the numerical monitor that logging realizes measurement result.
Tilting-type pressure gauge 16 carries out data cube computation with data acquisition controller 21, is obtained by data acquisition controller 21
The flow velocity of gas.
Certainly, in order to represent convenient, Fig. 3 is to illustrate 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 connects with tapered snorkel 1
Connect, by air flue, one section 3 supplies to whole device.Gas channel connects tapered snorkel 1, described blower fan 2 and airflow path
Connection.
Preferably, the runner wherein where Pitot static tube system is square-section, venturi flow meter systems, orifice plate
Runner where flowmeter system is circle.
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, the gas come out from previous survey tool otherwise can be caused not flow fully so that
Cause measurement result misalignment, it is therefore necessary to a distance is set between each survey tool so that the gas in runner fills
Shunting is dynamic, so as to ensure the accuracy of measurement.
Experiment finds that Pitot static tube system 3, venturi flow meter systems 4, orifice flow meter systems 5, flow control are
System the distance between 7 is related to runner caliber.Under normal circumstances, the distance between each survey tool be it is more remote longer, still
It is in view of Cost Problems, space problem and longer in view of distance, the error problem for causing gas to leak and producing, therefore this
Invention has obtained optimal range formula by substantial amounts of experiment.
Runner where Pitot static tube system is square section, venturi flow meter systems, orifice flow meter systems
The runner at place is circle, in such cases, and the square passageway inner section length of side of Pitot static tube system is L, and circle is logical
The radius in road 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, described a is with (R/2)2+L2Increase and increase.Preferably, described a is with (R/2)2+
L2Increase and increased amplitude is increasing.
It is found through experiments that, a amplitude is with (R/2)2+L2Constantly change, can cause result more accurate, 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 are parameter, 10<b<23.
Preferably, described b increases with R increase.Preferably, described b is with R increase, increased amplitude is more next
It is bigger.
It is found through experiments that, b amplitude constantly changes with R, and result can be caused more accurate, survey is drastically increased
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 are parameter, 4<c<13.Make
Increase for preferred, described c with R increase.Preferably, increased amplitude is increasingly with R increase by described c
Greatly.
It is found through experiments that, c amplitude constantly changes with R, and result can be caused more accurate, survey is drastically increased
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 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 top flange
Distance.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
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 produces the gas flowed in runner
Stream, the flow control system controls the size of air-flow, described Pitot static tube system, venturi flow meter systems, orifice plate
Flowmeter system is arranged on runner, the flow for measuring air-flow in runner, the flow control system, Pitot static tube system
System, venturi flow meter systems, orifice flow meter systems carry out data cube computation with data acquisition controller respectively, and the data are adopted
Collection controller is connected with data display equipment；
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；
Gas flow generating device includes centrifugal fan, tapered snorkel and gas channel, gas channel connection tapered snorkel, institute
The blower fan stated is connected with gas channel；Runner wherein where Pitot static tube system is square-section, Venturi meter system
Runner where system, orifice flow meter systems is circle；
The square passageway inner section length of side of Pitot static tube system is L, and the radius of circular channel is R, then Pitot static tube system
Minimum range S1 between system and venturi flow meter systems>=a* ((R/2)2+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 are parameter, 10<b<23；
Described a is with (R/2)2+L2Increase and increase；
Described b increases with R increase；
The Pitot static tube system includes Pitot tube and Pitot tube mobile device, and mobile device can be such that Pitot tube is surveying section
Moved freely in face；
Described mobile device includes sliding block, and described Pitot tube is arranged in sliding block, and described sliding block includes projection, described convex
Block is arranged in the groove of air flue tube wall, and projection can be moved in groove, and Pitot tube oneself is realized by the movement of projection
By moving；
The distance between orifice flow meter systems and flow control system S3>=c*R, wherein c are parameter, 4<c<13.
2. gas mobility status measurement experiment device as claimed in claim 1, also including high-precision gas flowmeter, the height
Precision gas flowmeter and data acquisition controller data cube computation, the flow control system can control gas flow, and lead to
The gas flow rate for crossing high-precision gas flow measuring amount is shown on the display device；The number of the high-precision gas flowmeter measurement
According to for correction data, Pitot static tube system, venturi flow meter systems, orifice flowmeter systematic survey data respectively with height
The data of precision gas flowmeter measurement are contrasted, and determine the size of error.
3. gas mobility status measurement experiment device as claimed in claim 1, the flow control system is installed in air-flow
The baffle plate and mobile device of channel end, air-flow size is controlled by the distance of controlling baffle plate and channel outlet.
Priority Applications (3)
| 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 |
| CN201710499096.4A CN107270982B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision that measuring device is mobile |
| CN201610108772.6A CN105590538B (en) | 2016-02-27 | 2016-02-27 | A kind of gas flow measurement experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | 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 |
| CN112203532A (en) * | 2018-05-31 | 2021-01-08 | 日本烟草产业株式会社 | Fragrance generating device |
| 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 |
| CZ2019161A3 (en) * | 2019-03-16 | 2020-09-30 | Jaroslav Mikan | Ultrasonic compact flow meter, especially for gas |
| 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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- 2016-02-27 CN CN201710499096.4A patent/CN107270982B/en not_active Expired - Fee Related
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| CN204330048U (en) * | 2013-12-24 | 2015-05-13 | 迪特里奇标准公司 | For the equipment of the flow of measuring process fluid |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105590538A (en) | 2016-05-18 |
| CN107121178A (en) | 2017-09-01 |
| CN107121178B (en) | 2019-03-29 |
| CN107270982A (en) | 2017-10-20 |
| CN107270982B (en) | 2019-07-26 |
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