CN109724766A - A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device - Google Patents
A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device Download PDFInfo
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- CN109724766A CN109724766A CN201910097832.2A CN201910097832A CN109724766A CN 109724766 A CN109724766 A CN 109724766A CN 201910097832 A CN201910097832 A CN 201910097832A CN 109724766 A CN109724766 A CN 109724766A
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Abstract
The present invention relates to a kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate devices, it is characterized in that stream sand inlet is arranged in sand and dust gradient collector, there is gradient channel with what stream sand inlet was connected to, what is be connected with gradient channel has collector to place mouth, collector placement mouth outside exposing gradient is respectively provided with pumping connecting tube on leting slip a remark, gradient let slip a remark downward vertically bed surface with pumping connecting tube connect, pumping connecting tube connects with stream suction branch again, it is inserted on the stream knockout drum in respective channel the outlet of stream suction branch, stream knockout drum is connected to weighing bottle, weighing bottle basis rest high-precision weighing sensor, by the sedimentary loading in high-precision weighing sensor measurement weighing bottle.The sedimentary loading that the present invention is surveyed is accurate, errorless, for disclosing stream by flow field change rule, provides data supporting for research wind speed and soil texture and soil moisture content and the relationship of soil drifting.
Description
Technical field
The invention belongs to a kind of measuring device, in particular to a kind of blowing sand wind tunnel bleeder stream gradient Gao Jisha
Rate device.
Background technique
Blowing sand wind tunnel test be for simulation field dust storm phenomenon and the large-scale instrument that designs is standby.Carrying out dust storm phenomenon
Simulated experiment in, wind speed in the range of 2 meter per seconds~40 meter per second consecutive variations adjust the speed, wind speed size is by artificially controlling speed change
Device is completed.In scientific experiment activity, the relationship of wind speed and sedimentary loading, the measurement of Sha Tongliang are that research dust storm plays jump mechanism, into
One important physical amount of research and the engineering calculation of row stream.Wind tunnel experiment is based on blown sand physics principle to sand- prevention system
It is observed evaluation and utilization, the measure of checking winds and fixing drifting sand provides scientific basis, but in husky wind-tunnel observation wind-driven sediment through overcurrent
In the experimental study of field, there are such a problems, i.e., when air velocity reaches a certain wind speed, need a period of time, however
When wind speed reach it is stable draft value during, the sand bed face in blowing sand wind tunnel has been changed, husky wind tunnel test
Section placement sand instrument has entered the grains of sand of saltation, and sedimentary loading under a certain wind speed is caused to have error.
Summary of the invention
In view of above-mentioned, the purpose of the present invention is to provide a kind of blowing sand wind tunnel bleeder stream gradient height collection sand rates
Device, using the docking of each device, no sand drift is lost, and wind speed is synchronous with wind-tunnel interior air-flow, is claimed by high-precision weighing sensor measurement
Sedimentary loading in measuring bottle, the sedimentary loading surveyed are accurate, errorless.
The purpose of the present invention is be achieved through the following technical solutions:
A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device, mainly by taking out
Air pump, weighing bottle, high-precision weighing sensor, stream knockout drum, gradient let slip a remark, in blowing sand wind tunnel, sand bed face,
Gradient channel, sand and dust gradient collector are constituted without paper multichannel recorder, multiple sensor for bridge circuit, test sand-protecting barrier model.
In blowing sand wind tunnel, collector places mouth and tightens on device fixed side panel both sides with screw and nut, sand and dust gradient collector
Collector is put in the bed surface bottom plate for placing mouth, sand bed face is laid on plate, the test sand-protecting barrier for requiring detection after laying
Model is arranged at 1 meter in front of from sand and dust gradient collector stream sand inlet.Sand and dust gradient is received with the handle on collector
Storage is seated in front of stream sand inlet at 1 meter, and sand and dust gradient collector sand collection port faces air-flow wind speed and direction, sand and dust
Gradient channel bottom end in gradient collector, under wind-tunnel bottom plate collector place mouth outside expose gradient let slip a remark on be respectively provided with
It is evacuated connecting tube, gradient is connected with and lets slip a remark.Gradient let slip a remark bed surface downward vertically be put into sand and dust gradient with pumping connecting tube connect, pumping
Connecting tube connects with stream suction branch, is tightened with band, and stream suction branch exports the stream for being inserted in respective channel
It on knockout drum, is also tightened with band, stream knockout drum is connected to weighing bottle, weighing bottle basis rest high-precision weighing sensing
Device is equipped with sand and dust discharge nozzle in the stream knockout drum portion in respective channel, and stream knockout drum is set with sand and dust discharge nozzle branch road
Sand excluding valve is set, air-flow suction branch is connected to by respective bypass flow regulating valve with pumping main pipeline, the outlet of pumping main pipeline
The aspiration pump of upper installation, 485 signal-powered lines are powered and are passed to high-precision weighing sensor for bridge circuit by multiple sensor
Defeated record to no paper multichannel recorder stores.
Compared with prior art, the invention has the advantages that
1, most use in collection stream being tested in blowing sand wind tunnel and putting staged sand-taped instrument, staged sand-taped instrument sets ladder
It is inconvenient to spend channel installation, or places net formula sand-taped instrument in wind-tunnel, fine sand dirt is easy to flow out from the gap of net.This
Sand and dust gradient collector is seated in suitable position in front of stream sand inlet by invention, and staged sand-taped instrument sand inlet is avoided to produce
Raw dust storm disturbs part, i.e. it is (this into sand amount since flow-disturbing to reduce into the reduction of husky efficiency to reach sand inlet early period for sand and dust
Phenomenon can test the missing particle of high-speed photography from PAV and can see), overcome net formula sand-taped instrument fine sand leakage.This hair
Bright aspiration pump and the test wind size of can use can be made in sand inlet and front entrance by flow regulating valve size
Air velocity is consistent, avoids air-flow in this way in the flow-disturbing phenomenon of import, thus reaches percent 99 sand collecting amount.
2, the not set automatic weighing system of the sand-taped instrument now applied.Wind after the completion of test of the invention, from respective channel
The sand and dust 1 that sand drift knockout drum bottom is collected into are flowed into high-precision weighing sensing by branch sand excluding valve, from sand discharge leakage discharge nozzle
It, can the subsynchronous weighing of sand and dust one by the multichannel weighing sensor device of development to different gradients in the weighing bottle that device is placed
Record storage.Meanwhile device separates stream due to using stream sand and dust knockout drum, passes through each barometric damper
Door and each branch sand excluding valve door control, one be sand inlet flow velocity adjusting it is consistent with wind tunnel speed act on, produce sand collection port
Raw disturbance, second is that passing through clean gas flow in suction branch, pumping supervisor's extraction knockout drum；The sand and dust being deposited in knockout drum pass through
After primary test accumulation, turn off blower and open each channel sand discharge valve, the sand and dust of sedimentation flow in weighing bottle from sand discharge mouth to be claimed
Weight, this acquisition, separation, pumping, sedimentation, shutdown, sand discharge and weighing are integrated, improve and collect sand and dust efficiency, eliminate wind
Pressure improves weighing precision to electronic balance weighing device pressure.It solves after the prior art has been surveyed every time and instrument is taken out, then
The grains of sand are poured out from sand collecting box one by one, are weighed on balance, hand-kept is made.Then sand collecting box is put into sand-taped instrument again
It is big to install the different application condition that generates of degree every time for internal alignment sand inlet, then carry out the measurements of sand and dust next time and collect
Problem.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Specific embodiment
In the following, being further described again in conjunction with attached drawing to technical solution of the present invention:
As shown in Figure 1, a kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device, mainly by aspiration pump 1, title
Measuring bottle 4, high-precision weighing sensor 5, stream knockout drum 8, gradient are let slip a remark 13, sand bed face 15 in 9, blowing sand wind tunnel, ladder
Spend channel 20, sand and dust gradient collector 21, without paper multichannel recorder 23, multiple sensor for bridge circuit 24, test sand-protecting barrier mould
Type 26 is constituted.In blowing sand wind tunnel 13,10 collectors place mouth 27 and twist the screw and nut 18 of both sides fixed side panel 17
Tightly.Before being laid with sand, the placement mouth 27 of placement sand and dust gradient collector is covered the sand stream for preventing bed surface to be laid with plank
It loses, sand bed face 15 is laid on plate.Sand bed face 15 is 2 meters long, 1 meter wide, the sand and dust 12 that 0.01 meter of thickness.After sand bed face 15 is laid
Require the test sand-protecting barrier model 26 of detection at 1 meter from the front of 21 stream sand inlet of sand and dust gradient collector 19.With collection
Sand and dust gradient collector 21 is put collector and placed on 27 bed surface bottom of mouth, 30 plate by the handle 22 on device, from stream sand inlet
At 19 1 meter of fronts, and by 21 sand collection port of sand and dust gradient collector in air-flow wind speed and direction 14, sand and dust gradient collector 21
20 bottom end of gradient channel, occupy collector between wind-tunnel bottom plate and place the gradient exposed outside mouth 27 and let slip a remark and be respectively provided with 10 on 9
A pumping connecting tube 10 is connected with 10 gradients and lets slip a remark 9, and test parts arrangement is completed in blowing sand wind tunnel 13.In wind sand environment
Outside wind-tunnel 13,10 gradients let slip a remark 9 downward vertically bed surface connect with 10 pumping connecting tubes 10,10 pumping connecting tubes 10 and 10
A stream suction branch 11 connects, and is tightened with band 28, and stream suction branch 11 exports the stream for being inserted in respective channel
It on knockout drum 8, is also tightened with band 28,10 stream knockout drum 8 and 10 weighing bottles 4 are connected to, 10 4 bottom of weighing bottle peaces
10 high-precision weighing sensors 5 are put, the stream knockout drum 8 in respective channel is equipped with sand and dust discharge nozzle 7, stream knockout drum
8 with the road of sand and dust discharge nozzle 7 setting 6,10 branch stream suction branches 29 of sand excluding valve by respective bypass flow regulating valve 3 and
Respective pumping main pipeline 2 is connected to, and the clean gas flow in stream is discharged in the aspiration pump 1 installed in the outlet of pumping main pipeline, is led to
Percent 99 can be reached by crossing bypass flow regulating valve 3 and controlling extraction flow size and improve collection sand and dust collection efficiency, in respective channel
8 lower part of stream knockout drum be also equipped on sand and dust discharge nozzle 7 have branch sand excluding valve 6 that will can once test after the completion of respective
8 bottom collection of stream knockout drum in channel to sand and dust 12 by branch sand excluding valve 6 from sand discharge let slip a remark 7 be flowed into high-precision claim
It retransmits in the weighing bottle 4 that sensor 5 is placed.585 signal-powered lines 25 are by multiple sensor for bridge circuit 24 to high-precision weighing
The no record of paper multichannel recorder 23 storage is powered and be transferred to sensor 5.
In implementation process, blowing sand wind tunnel test model arrangement, bed surface is sanded, and prevents sand and dust gradient collection device from collecting
Wind-tunnel window is first closed in part.Bottom connects each bleed-off passage pipeline, closes bypass flow regulating valve 3 and branch sand excluding valve 6.
In blowing sand wind tunnel 13, blower is opened, wind speed is transferred to 10 meter per seconds by 2 meter per seconds.Wind speed is stablized up to 10 meter per seconds, air speed value
Afterwards, it finely tunes each bypass flow regulating valve 3 and reaches synchronous with wind-tunnel interior air-flow.Open each bypass flow regulating valve 3 and branch sand discharge
Valve 6 opens 19 front shroud start recording time of stream sand inlet, saltation to the 10 meter per seconds test flow speed value debugged in advance
The grains of sand 16 enter the gradient channel 20 in sand and dust gradient collector 21, the sand and dust 12 in gradient channel 20 from stream sand inlet 19
The 10 collectors placement mouths 27 that have being connected are flowed by gradient channel 20 again, then flow into external dew by 10 collectors placement mouths 27
10 gradients, which are let slip a remark, out is respectively provided with 10 pumping connecting tubes, 10,10 gradients on 9 and lets slip a remark 9 bed surface and 10 pumpings downward vertically
Connecting tube 10 connects, and pumping connecting tube 10 connects with stream suction branch 11,
After reaching the test data sheet time, stop wind tunnel fan, close aspiration pump 1, close flow control valve 3, opens weighing
Acquisition system switch, opens each branch sand discharge valve switch 6,
485 serial ports are weighed the sand and dust weight that each channel is collected automatically, record storage display weight value.
Primary test followed by just carries out next measuring wind speed after collecting weighing operation, operating procedure ditto,
Only wind speed is different.It reduces and repeats installation sand-taped instrument number, reduce Errors Caused by Human.
Claims (1)
1. a kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device, mainly by aspiration pump (1), weighing bottle
(4), high-precision weighing sensor (5), stream knockout drum (8), gradient let slip a remark (9), (13), sand bed face in blowing sand wind tunnel
(15), gradient channel (20), sand and dust gradient collector (21), without paper multichannel recorder (23), multiple sensor for bridge circuit
(24), test sand-protecting barrier model (26) is constituted, and in blowing sand wind tunnel (13), collector places mouth (27) for device fixed side panel
(17) both sides are tightened with screw and nut (18), and sand and dust gradient collector (21) puts collector in the bed surface bottom for placing mouth (27)
(30) on plate, on plate be laid with sand bed face (15), after laying require detection test sand-protecting barrier model (26) from sand and dust gradient
It is arranged at 1 meter in front of collector (21) stream sand inlet (19), it is characterized in that: with the handle (22) on collector that sand and dust are terraced
Degree collector (21) is seated in front of stream sand inlet (19) at 1 meter, and sand and dust gradient collector (21) sand collection port faces
Air-flow wind speed and direction (14), gradient channel (20) bottom end in sand and dust gradient collector (21), pacifies from collector under wind-tunnel bottom plate
It puts to expose gradient outside mouth (27) and let slip a remark and is respectively provided with pumping connecting tube (10) on (9), pumping connecting tube (10) is connected with gradient leakage
Mouth (9), gradient let slip a remark (9) downward vertically bed surface be put into sand and dust gradient with pumping connecting tube (10) connect, pumping connecting tube (10)
Connect with stream suction branch (11), tightened with band (28), respective channel is inserted in stream suction branch (11) outlet
It on stream knockout drum (8), is also tightened with band (28), stream knockout drum (8) is connected to weighing bottle (4), weighing bottle (4) bottom
High-precision weighing sensor (5) are placed in portion, sand and dust discharge nozzle (7) are housed in stream knockout drum (8) portion in respective channel, dust storm
Flow separation tank (8) and sand and dust discharge nozzle (7) branch road setting sand excluding valve (6), air-flow suction branch (29) pass through respective branch
Flow control valve (3) is connected to pumping main pipeline (2), and the aspiration pump (1) installed in the outlet of pumping main pipeline, 485 is signal-powered
Line (25) is powered and is transferred to no paper multichannel to high-precision weighing sensor (5) for bridge circuit (24) by multiple sensor and remembers
Record the storage of instrument (23) record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910097832.2A CN109724766A (en) | 2019-01-31 | 2019-01-31 | A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910097832.2A CN109724766A (en) | 2019-01-31 | 2019-01-31 | A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device |
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| CN109724766A true CN109724766A (en) | 2019-05-07 |
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| CN201910097832.2A Pending CN109724766A (en) | 2019-01-31 | 2019-01-31 | A kind of blowing sand wind tunnel bleeder stream gradient height collection sand rate device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160733A (en) * | 2019-05-16 | 2019-08-23 | 湖南第一师范学院 | A kind of adjustable laying component of wind comfort |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786681A (en) * | 2005-10-17 | 2006-06-14 | 西安交通大学 | Gas exhausting type vertical sand collecting system |
| CN104122064A (en) * | 2013-04-27 | 2014-10-29 | 中国科学院寒区旱区环境与工程研究所 | Soil wind erosion collector for wind tunnel |
-
2019
- 2019-01-31 CN CN201910097832.2A patent/CN109724766A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786681A (en) * | 2005-10-17 | 2006-06-14 | 西安交通大学 | Gas exhausting type vertical sand collecting system |
| CN104122064A (en) * | 2013-04-27 | 2014-10-29 | 中国科学院寒区旱区环境与工程研究所 | Soil wind erosion collector for wind tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 冬梅: "可移动式风蚀风洞集沙仪及排沙器的性能试验研究", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160733A (en) * | 2019-05-16 | 2019-08-23 | 湖南第一师范学院 | A kind of adjustable laying component of wind comfort |
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Application publication date: 20190507 |