CN207816416U - Air pulsing flow standard experimental rig - Google Patents
Air pulsing flow standard experimental rig Download PDFInfo
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- CN207816416U CN207816416U CN201721725826.XU CN201721725826U CN207816416U CN 207816416 U CN207816416 U CN 207816416U CN 201721725826 U CN201721725826 U CN 201721725826U CN 207816416 U CN207816416 U CN 207816416U
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Abstract
The utility model discloses air pulsing flow standard experimental rigs, including rack, PLC and computer, rack is equipped with gas diverter, stagnation container and remittance cylinder, gas diverter includes two air inlets and a gas outlet, gas outlet and stagnation reservoir, stagnation container is equipped with multiple switch component, switch module includes critical flow venturi nozzle and solenoid valve, critical flow venturi nozzle is connected to by solenoid valve with remittance cylinder, two air inlets are respectively connected with pipeline, two pipelines are all connected with the instrument for needing to be tested, and are set in rack there are two dynamic image sampler.Stagnation container is equipped with the first temperature sensor and first pressure sensor, and rack is equipped with Temperature Humidity Sensor and second pressure sensor.Air pulsing stream and the experiment of continuous flow flow standard can be carried out, computer auto-detection reduces human cost；Precision is improved, the additional uncertainty that different device measures Pulsating Flow and continuous flow introduces is avoided；Square-wave pulsatory stream source with controllable different amplitudes.
Description
Technical field
The invention belongs to measurement of gas flow technical field of measurement and test, and in particular to air pulsing flow standard experimental rig.
Background technology
Flow is an important parameter in modern industrial production and people's life, especially natural gas flow measurement, no
But applied to industrial processes, also spread to urban household gas for domestic use.Three kinds of common flows of gas flow measurement
Resistance standard test device, i.e. bell-jar gas flow standard equipment, piston-type gas flow standard device and sonic nozzle formula gas
Flow standard device.But above-mentioned three kinds of devices cannot be used for existing measuring instrument Pulsating Flow error of indication experiment.Since country builds
If portion promulgates CJ/T477-2015《Ultrasonic wave gas meter》Since standard, measuring instrument industry is badly in need of Pulsating Flow/intermittent current experiment
Device, with scientific validation gas dosing instrument under the conditions of nonstationary flow, Pulsating Flow true metering performance.It is required that Pulsating Flow is tested
Device can generate the air pulsing source that can be repeated several times reproduction required by product standard, have the reliable aerometer of accurate measurement
Measure standard, versatility is good, and flow measurement range is wide, can more instrument be carried out at the same time experiment, and manufacturing cost and experimental cost
It is unlikely too high.
Invention content
The object of the present invention is to provide air pulsing flow standard experimental rigs, can carry out complete air pulsing stream
Tested with continuous flow flow standard, be integrated with interface, sensor, sampling, flow control, accuracy computation and carried out computer from
Dynamic detection, reduces human cost and workload；Measurement uncertainty accuracy is improved, different device is avoided and measures Pulsating Flow
The additional uncertainty introduced with continuous flow；Square-wave pulsatory stream source with controllable different amplitudes.
In order to achieve the above object, the major technique solution of the present invention is to provide air pulsing flow standard experimental rig, wrap
Including rack, PLC and computer, the rack are equipped with gas diverter, stagnation container and remittance cylinder, and the gas diverter includes pair
Claim a gas outlet being equipped in the middle part of two air inlets at its both ends and its, in the middle part of the gas outlet and stagnation container to connect
Logical, the stagnation container is equipped with multiple switch modules being connected to remittance cylinder, and the switch module includes that stagnation container is equipped with
Critical flow venturi nozzle and solenoid valve, the critical flow venturi nozzle by solenoid valve with converge cylinder be connected to, it is described two into
Gas port is respectively connected with a pipeline, and described two pipelines are symmetricly set on gas diverter both sides and are respectively connected with an instrument to be tested
Table, sets that there are two the dynamic image samplers for acquiring meter reading to be tested in the rack.The remittance cylinder is equipped with out
Tracheae, and escape pipe is connect with negative-pressure air fan or straight-through air, the stagnation container is equipped with the first temperature sensor and first
Pressure sensor is equipped with Temperature Humidity Sensor at the position of instrument to be tested in the rack and second pressure senses
Device, the computer, the first temperature sensor, first pressure sensor, Temperature Humidity Sensor, second pressure sensor and solenoid valve
It is electrically connected with PLC, the dynamic image sampler is electrically connected with computer.
Described two pipelines are symmetricly set on gas diverter both sides, can ensure both sides pipeline and two instrument to be tested
The steady air current that table passes through is uniform, is beneficial to accurate experimental result.
It, can be at least there are two the critical flow venturi nozzle aperture in switch module is different in the multiple switch module
According to the throughput size that instrument to be tested needs to measure, select corresponding switch module open-minded, to have different stream
Amount can be tested.
The dynamic image sampler is arranged in the front of the instrument board of instrument to be tested, and can wait for reality by collected
The reading for the instrument tested is transferred in the system of computer.
The remittance cylinder escape pipe is connect with vacuum system (negative-pressure air fan) or straight-through air (when positive pressure works), described
As soon as the cylinder that converges is the equal of a container, negative-pressure air fan takes out this container, it is allowed to be in negative pressure state.
The gas diverter is stainless steel machinery welded unit, is horizontally arranged.
The gas diverter includes the reversing tube and cylinder of cast closed at both ends, set in the reversing tube there are two point
Reversing tube is divided into Zuo Qu, Zhong Qu and You Qu by partition board, and described two demarcation strips are equipped with through-hole, and the reversing tube is in middle area
Middle position is equipped with gas outlet, and the reversing tube is respectively equipped with an air inlet, described two air inlets in Zuo Qu and You Qu
Gas outlet both sides are symmetricly set on, described reversing tube one end is equipped with rod aperture, and being equipped in the rod aperture can be in reversing tube along axis
The piston rod of the connecting rod of reciprocating motion, the cylinder is connect with connecting rod, is arranged on the connecting rod there are two can close the close of through-hole
Capping, described two sealing covers coordinate with the through-hole of described two demarcation strips respectively, described two through-holes, and a through-hole is opened,
Then another through-hole is closed.
The correcting sheet with commutation tube cavity cooperation is arranged on the connecting rod, it is in stable that can make the reciprocating motion of connecting rod
Linear motion.
Operation principle：It is manually installed that test flow is manually set in the operating system of computer after the instrument tested,
Click traffic button, corresponding solenoid valve are opened, differential pressure of the gas between instrument air inlet and electromagnetism valve air gate to be tested
One of symmetrical dual circuit of force effect lower edge flows." starting to detect " button is clicked, picture sampler is taken the photograph to be tested immediately
The initial indicating value of instrument, simultaneity factor start the thermal parameters such as timing, measuring temperature, pressure and gas humidity.Work as computer timer
When reaching the pre-set single test time, gas diverter switches gas flow path, that is, changes left instrument to be tested and waited for for the right side
Experiment instrument (or vice versa).Repeatedly left logical right disconnected repeatedly or left disconnected right logical experiment, for the instrument to be tested to separate unit
As Pulsating Flow or meaning intermittent current experiment.If not controlling commutation action, it is continuous-flow experiment to extend time of measuring.Foundation
Related Mathematical Models can measure instrument to be tested and the flow indicating value of critical flow venturi nozzle standard scale, through simple respectively
It can be calculated the relative error of indicating value of instrument to be tested.Compare the Pulsating Flow under same traffic and the indicating value under the conditions of continuous flow
Error, it is known that metering instrument performance to be tested provides reliable experimental data to be improved for design.
The critical flow venturi nozzle design considerations GB/T 21188-2007/ISO 9300:2005《With critical flow text
Nozzle measures gas flow in mound》.
The temperature sensor, pressure sensor, barometric pressure sensor, Temperature Humidity Sensor be standard metrology appliance,
It is outsourcing piece, test pipe is stainless steel pipe, and the rack is built by aluminium alloy extrusions and stainless steel plate.
The operating software system designed, designed of the computer, tool independent intellectual property right, dynamic image sampler designed, designed,
Has independent intellectual property right.
The present invention devises one kind and is metering primary standard, is aided with entrance temperature and pressure based on more critical flow venturi nozzles are combined
The normal flow experimental rig of parameter testing and controllable gas flow path.The device can positive/negative-pressure work, separate unit or more wait testing
Instrument tandem test.Multiple critical flow nozzles in parallel can expand measurement range.Experiment process realizes full-automatic survey by computer
Control also manually copy reading can calculate error testing as a result, establishing multiple quasi-square wave arteries and veins initially with termination instrument indication value by computer
Dynamic flow and the error of indication calculate mathematical model.
The beneficial effects of the invention are as follows：Complete air pulsing stream and the experiment of continuous flow flow standard can be carried out, is integrated
Interface, sensor, sampling, flow control, accuracy computation and have carried out computer auto-detection, reduce human cost and work
It measures；Measurement uncertainty accuracy is improved, different device measurement Pulsating Flow is avoided and the additional of continuous flow introducing does not know
Degree；Square-wave pulsatory stream source with controllable different amplitudes.
Description of the drawings
Fig. 1 is the structural schematic diagram of one embodiment of the invention,
Fig. 2 is the gas diverter cross-sectional view of the structure in Fig. 1 embodiments,
In figure：Rack 1, computer 3, gas diverter 4, stagnation container 5, remittance cylinder 6, air inlet 7, gas outlet 8, is faced PLC2
Flow Venturi nozzle 9, solenoid valve 10, pipeline 11, instrument 12 to be tested, dynamic image sampler 13, escape pipe 14, negative pressure in boundary
Wind turbine 15, the first temperature sensor 16, first pressure sensor 17, Temperature Humidity Sensor 18, second pressure sensor 19, commutation
Pipe 20, cylinder 21, demarcation strip 22, through-hole 23, connecting rod 24, sealing cover 25, correcting sheet 26.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained belong to what the present invention protected
Range.
As shown in Figure 1, air pulsing flow standard experimental rig described in the present embodiment, including rack 1, PLC2 and electricity
Brain 3, the rack 1 be equipped with gas diverter 4, stagnation container 5 and converge cylinder 6, the gas diverter 4 include symmetrically its two
The gas outlet 8 that two air inlets 7 at end and its middle part are equipped with, the gas outlet 8 are connected to the middle part of stagnation container 5, institute
State stagnation container 5 be equipped with it is multiple with converge the switch modules that are connected to of cylinder 6, the switch module includes the facing of being equipped with of stagnation container 5
Flow Venturi nozzle 9 and solenoid valve 10 on boundary, and the critical flow venturi nozzle 9 is connected to by solenoid valve 10 with remittance cylinder 6, described
Two air inlets 7 are respectively connected with a pipeline 11, and described two pipelines 11 are symmetricly set on 4 both sides of gas diverter and are all connected with
There is instrument 12 to be tested, sets that there are two adopted for acquiring the dynamic image that instrument 12 to be tested is read in the rack 1
Sample device 13.The remittance cylinder 6 is equipped with escape pipe 14, and escape pipe 14 is connect with negative-pressure air fan 15 or straight-through air, and the stagnation is held
Device 5 is equipped with the first temperature sensor 16 and first pressure sensor 17, close to the position of instrument 12 to be tested in the rack 1
It sets place and is equipped with Temperature Humidity Sensor 18 and second pressure sensor 19, the computer 3, the first temperature sensor 16, first pressure
Sensor 17, Temperature Humidity Sensor 18, second pressure sensor 19 and solenoid valve 10 are electrically connected with PLC2, the dynamic image
Sampler 13 is electrically connected with computer 3.
Described two pipelines 11 are symmetricly set on 4 both sides of gas diverter, can ensure both sides pipeline 11 and two are waited for reality
The steady air current that the instrument 12 tested is passed through is uniform, is beneficial to accurate experimental result.
It, can at least there are two 9 aperture of the critical flow venturi nozzle difference in switch module in the multiple switch module
With the throughput size for needing to measure according to instrument 12 to be tested, select corresponding switch module open-minded, to difference
Flow can be tested.
The dynamic image sampler 13 is arranged in the front of the instrument board of instrument 12 to be tested, can will be collected
The reading of instrument 12 to be tested is transferred in the system of computer 3.
6 escape pipe 14 of remittance cylinder is connect with vacuum system (negative-pressure air fan 15) or straight-through air (when positive pressure works),
As soon as the remittance cylinder 6 is the equal of a container, negative-pressure air fan 15 takes out this container, it is allowed to be in negative pressure state.
The gas diverter 4 is stainless steel machinery welded unit, is horizontally arranged.
As shown in Fig. 2, the gas diverter 4 includes the reversing tube 20 and cylinder 21 of cast closed at both ends, it is described to change
It is set into pipe 20 and reversing tube 20 is divided into Zuo Qu, Zhong Qu and You Qu there are two demarcation strip 22, described two demarcation strips 22 are all provided with
There are through-hole 23, middle position of the reversing tube 20 in middle area to be equipped with gas outlet 8, the reversing tube 20 is in Zuo Qu and right differentiation
It does not set there are one air inlet 7, described two air inlets 7 are symmetricly set on 8 both sides of gas outlet, and 20 one end of the reversing tube is equipped with
Rod aperture, is equipped with the connecting rod 24 that can be moved back and forth along axis in reversing tube 20 in the rod aperture, the piston rod of the cylinder 21 with
Connecting rod 24 connects, and is arranged on the connecting rod 24 there are two the sealing cover 25 that can close through-hole 23, described two sealing covers 25 are distinguished
Coordinate with the through-hole 23 of described two demarcation strips 22, described two through-holes 23, a through-hole 23 is opened, then another 23 envelope of through-hole
It closes.
It is arranged with the correcting sheet 26 coordinated with 20 inner cavity of reversing tube on the connecting rod 24, the reciprocating motion of connecting rod 24 can be made
In stable linear motion.
Operation principle：It is manually installed after the instrument 12 tested, in the operating system of computer manually setting experiment stream
Amount, click traffic button, corresponding solenoid valve 10 are opened, and gas is in 12 air inlet 7 of instrument to be tested and 10 gas outlet 8 of solenoid valve
Between the flowing of one of the symmetrical dual circuit of differential pressure force effect lower edge." starting to detect " button is clicked, picture sampler is taken the photograph immediately
12 initial indicating value of instrument that must be to be tested, simultaneity factor start the thermal parameters such as timing, measuring temperature, pressure and gas humidity.
When 3 timer of computer reaches the pre-set single test time, gas diverter 4 switches gas flow path, that is, changes a left side and wait for reality
The instrument 12 tested be right instrument 12 to be tested (or vice versa).It is repeatedly left repeatedly to lead to the logical experiment in the right disconnected or left disconnected right side, to list
For platform instrument 12 to be tested be Pulsating Flow or meaning intermittent current test.If not controlling commutation action, when extending measurement
Between be continuous-flow experiment.According to Related Mathematical Models, instrument 12 to be tested and critical flow venturi nozzle can be measured respectively
The flow indicating value of 9 standard scales, through simple computation can must be to be tested instrument 12 relative error of indicating value.Compare under same traffic
Pulsating Flow and continuous flow under the conditions of the error of indication, it is known that 12 metering performance of instrument to be tested, to for design improve carry
For reliable experimental data.
9 design considerations GB/T 21188-2007/ISO 9300 of the critical flow venturi nozzle:2005《With critical flow text
Nozzle 9 measures gas flow in mound》.
The temperature sensor, pressure sensor, barometric pressure sensor, Temperature Humidity Sensor be standard metrology appliance,
It is outsourcing piece, test pipe 11 is stainless steel pipe, and the rack 1 is built by aluminium alloy extrusions and stainless steel plate.
The operating software system designed, designed of the computer 3, has independent intellectual property right, and dynamic image sampler 13 is voluntarily set
Meter has independent intellectual property right.
The present invention devises one kind and is metering primary standard, is aided with entrance temperature based on more critical flow venturi nozzles 9 are combined
Press the normal flow experimental rig of parameter testing and controllable gas flow path.The device can positive/negative-pressure work, separate unit or more wait for reality
12 tandem test of instrument tested.Multiple critical flow nozzles in parallel can expand measurement range.Experiment process is realized entirely certainly by computer
Dynamic observing and controlling also manually copy reading can calculate error testing as a result, establishing multiple quasi- sides initially with termination instrument indication value by computer
Pulsation wave flow and the error of indication calculate mathematical model.
The present invention can carry out complete air pulsing stream and continuous flow flow standard experiment, be integrated with interface, sensor,
Sampling, flow control, accuracy computation and have carried out computer auto-detection, reduce human cost and workload；Improve survey
Uncertainty precision is measured, the additional uncertainty that different device measures Pulsating Flow and continuous flow introduces is avoided；With controllably not
With the square-wave pulsatory stream source of amplitude.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is every that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (6)
1. air pulsing flow standard experimental rig, including rack (1), PLC (2) and computer (3), which is characterized in that the rack
(1) it is equipped with gas diverter (4), stagnation container (5) and remittance cylinder (6), the gas diverter (4) includes symmetrically at its both ends
Two air inlets (7) and its gas outlet (8) being equipped with of middle part, connect in the middle part of the gas outlet (8) and stagnation container (5)
Logical, the stagnation container (5) is equipped with multiple switch modules being connected to remittance cylinder (6), and the switch module includes stagnation container
(5) critical flow venturi nozzle (9) and solenoid valve (10) being equipped with, the critical flow venturi nozzle (9) pass through solenoid valve
(10) it is connected to remittance cylinder (6), described two air inlets (7) are respectively connected with a pipeline (11), and described two pipelines (11) symmetrically set
It sets in gas diverter (4) both sides and is respectively connected with an instrument (12) to be tested, set that there are two for adopting on the rack (1)
Collect the dynamic image sampler (13) of instrument (12) reading to be tested, the remittance cylinder (6) is equipped with escape pipe (14), and escape pipe
(14) it is connect with negative-pressure air fan (15) or straight-through air, the stagnation container (5) is equipped with the first temperature sensor (16) and
One pressure sensor (17) is equipped with Temperature Humidity Sensor on the rack (1) at the position of instrument (12) to be tested
(18) and second pressure sensor (19), the computer (3), the first temperature sensor (16), first pressure sensor (17), temperature
Humidity sensor (18), second pressure sensor (19) and solenoid valve (10) are electrically connected with PLC (2), and the dynamic image is adopted
Sample device (13) is electrically connected with computer (3).
2. air pulsing flow standard experimental rig according to claim 1, it is characterised in that described two pipelines (11) are right
Claim to be arranged in gas diverter (4) both sides.
3. air pulsing flow standard experimental rig according to claim 1, it is characterised in that in the multiple switch module
At least there are two the critical flow venturi nozzle aperture in switch module is different.
4. air pulsing flow standard experimental rig according to claim 1, it is characterised in that the dynamic image sampler
(13) it is arranged in the front of the instrument board of instrument (12) to be tested.
5. air pulsing flow standard experimental rig according to claim 1, it is characterised in that gas diverter (4) packet
The reversing tube (20) and cylinder (21) of cast closed at both ends are included, being set in the reversing tube (20) will change there are two demarcation strip (22)
It is divided into Zuo Qu, Zhong Qu and You Qu to pipe (20), described two demarcation strips (22) are equipped with through-hole (23), the reversing tube (20)
Middle position in middle area is equipped with gas outlet (8), and the reversing tube (20) is respectively equipped with an air inlet in Zuo Qu and You Qu
(7), described two air inlets (7) are symmetricly set on gas outlet (8) both sides, and described reversing tube (20) one end is equipped with rod aperture, described
The connecting rod (24) that can be moved back and forth along axis in reversing tube (20), the piston rod and connecting rod of the cylinder (21) are equipped in rod aperture
(24) it connects, is arranged that there are two the sealing cover (25) that can close through-hole (23), described two sealing covers on the connecting rod (24)
(25) coordinating respectively with the through-hole of described two demarcation strips (22) (23), described two through-holes (23), a through-hole (23) is opened,
Then another through-hole (23) is closed.
6. air pulsing flow standard experimental rig according to claim 5, it is characterised in that be arranged on the connecting rod (24)
There is the correcting sheet (26) with commutation tube cavity cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725826.XU CN207816416U (en) | 2017-12-12 | 2017-12-12 | Air pulsing flow standard experimental rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721725826.XU CN207816416U (en) | 2017-12-12 | 2017-12-12 | Air pulsing flow standard experimental rig |
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| Publication Number | Publication Date |
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| CN207816416U true CN207816416U (en) | 2018-09-04 |
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ID=63332033
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721725826.XU Active CN207816416U (en) | 2017-12-12 | 2017-12-12 | Air pulsing flow standard experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860443A (en) * | 2017-12-12 | 2018-03-30 | 杭州天马计量科技有限公司 | Air pulsing flow standard experimental rig |
-
2017
- 2017-12-12 CN CN201721725826.XU patent/CN207816416U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860443A (en) * | 2017-12-12 | 2018-03-30 | 杭州天马计量科技有限公司 | Air pulsing flow standard experimental rig |
| CN107860443B (en) * | 2017-12-12 | 2024-02-02 | 杭州天马计量科技有限公司 | Standard test device for gas pulsating flow |
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