CN107607406A - A kind of siphon destructive experimental study system - Google Patents
A kind of siphon destructive experimental study system Download PDFInfo
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- CN107607406A CN107607406A CN201710972472.7A CN201710972472A CN107607406A CN 107607406 A CN107607406 A CN 107607406A CN 201710972472 A CN201710972472 A CN 201710972472A CN 107607406 A CN107607406 A CN 107607406A
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- upper water
- siphon destructive
- water box
- experimental study
- pipeline
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- 230000001066 destructive effect Effects 0.000 title claims abstract description 65
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- 238000002474 experimental method Methods 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 5
- 241000282326 Felis catus Species 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000002195 synergetic effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
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- 238000007599 discharging Methods 0.000 claims description 2
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- 238000011105 stabilization Methods 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims description 2
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- 239000007792 gaseous phase Substances 0.000 claims 1
- 230000005619 thermoelectricity Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 4
- 238000012795 verification Methods 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 239000002915 spent fuel radioactive waste Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 230000033228 biological regulation Effects 0.000 description 2
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Abstract
The present invention provides a kind of siphon destructive experimental study system, and it includes：Stand main body, upper water box, lower header, test pipeline, water return pipeline, overflow blowoff line, instrument and control system；Due to siphonage during experiment, the water of the upper water box flow to the lower header, when liquid level drops to below siphon destructive hole, air is inhaled into the experiment pipeline, as the upper water box liquid level constantly declines, share shared by the air of suction is continuously increased, until siphonage terminates, off-test；Therebetween, each pressure information, liquid level information and flow information are logged in acquisition system.Siphon destructive experimental study system provided by the invention, employ and meet the 1 of engineering reality：1 experiment, comprehensively considers the various factors for influenceing siphon destructive phenomenon, stand loop is reasonable in design, and employs the mode of visual observation, and theoretical research and engineering verification are combined by experimental study system, and applicability is wider, and reliability is higher.
Description
Technical field
The invention belongs to the engineering test about siphon destructive and field of scientific study.It is more particularly related to
A kind of visualization siphon destructive experimental study system for engineering size pipeline.
Background technology
Siphonage is relatively conventional phenomenon in life, and its principle is fluid in siphon pipe positioned at peak to low level
Flowing so that siphon negative pressure is produced in pipe, so as to produce stable liquid flowing, siphon principle construction drainage, municipal drainage,
The each side such as hydraulic engineering have application.However, siphonage can also produce more detrimental effect sometimes, in special circumstances
Under, because steady flow caused by siphonage can cause water resource utility model, and fire water or the loss of irrigation water can more make
Into serious consequence.In nuclear power plant, spentnuclear fuel pond is the place of long-term storage reactor spentnuclear fuel, and boron water therein plays
Cool down spentnuclear fuel and ensure the no longer critical effect of nuclear reaction, spentnuclear fuel pond dehydration caused by pipeline breaking will be to nuclear power plant
Produce totally unfavorable influence.
Therefore, negative pressure caused by siphonage is eliminated, destruction siphon steady flow becomes the weight in water tank circuit design
Want link.Passed through in engineering frequently with the perforate of siphon pipe water absorbing section, or by its with method that the container of certain pressure is connected with
Siphon negative pressure is destroyed, siphon destructive valve is also relatively conventional engineering equipment.
However, the size still computational methods without determination that siphon hole opens up, generally siphon hole is empirically opened up in engineering
Or selection siphon destructive valve.If siphon hole opens up too small, siphon negative pressure can not be destroyed, and stable gas-liquid two-phase is formd in pipeline
Flowing, water tank level still have larger decline；If siphon hole opens up excessive, pipeline structure can rigidly be deteriorated, can when serious
Water pipe can be caused to bend or even be broken in siphon hole location.
Therefore, it is necessary to size to siphon hole, the liquid level discrepancy in elevation needed for siphon negative pressure is maintained, the gas-liquid two-phase in siphon pipe
Stream carries out deep analysis and calculating.Due to the flowing in siphon pipe be because of negative pressure and caused by biphase gas and liquid flow, number now
Value simulation can not all ensure its accuracy calculated, and the biphase gas and liquid flow test data of disclosed engineering caliber is also more few
See.
In view of this, it is necessary to which a kind of siphon destructive experimental study system is to siphon destructive phenomenon, gas-liquid two caused by negative pressure
Mutually stream carries out more fully effective experimental study, the insurmountable problem of experience run into engineering is provided preferably theoretical
Rely on.
The content of the invention
The present invention in view of the shortcomings of the prior art, proposes a kind of siphon destructive experimental study system.
Siphon destructive experimental study system includes：Stand main body, upper water box, lower header, pipeline is tested, water return pipeline, is overflow
Flow blowoff line, instrument and control system；Because siphonage, the water of the upper water box flow to the lower header during experiment, when
When liquid level is dropped to below siphon destructive hole, air is inhaled into the experiment pipeline, as the upper water box liquid level constantly declines,
Share shared by the air of suction is continuously increased, until siphonage terminates, off-test；Therebetween, each pressure information, liquid level letter
Breath and flow information are logged in acquisition system.
Preferably, the stand main body is formed from steel, and bottom is equipped with ground, supports whole test loop；The stand is total
Highly reach 20 meters, fluid flow reaches 1000 ton hours, and subjects pipeline diameter can reach DN250；The stand main body
With the cat ladder and protection railing for being available for personnel to climb, provided with anti-fall device with protection staff safety；The stand main body has
Four layer operation platforms, one two three layers of dismounting for experiment pipeline, top layer support upper water box, operating platform are surrounded by anti-fall column
Bar.
Preferably, the upper water box is made of stainless steel, and there is stainless steel lacing wire inside with proof strength, is filled with during experiment clear
Water, liquid level there are not overtesting pipeline horizontal segment；The upper water box is equipped with magnetic double level gauge, has transporting function, can be by liquid level
Signal is converted into the voltage signal needed for experiment acquisition system；There is Height Adjustable overflow baffle inside the upper water box, can
Upper water box liquid level is maintained to a stable position；The upper water box one side is equipped with pressure-bearing observation window, is available for personnel to watch or take the photograph
Camera shoots upper water box inner case；The upper water box, which has, extends bucket, and inside can accommodate all experiment pipelines, with upper water box
Welding；The upper water box, which extends bucket side, has pressure-measuring-point, and the height of upper water box liquid level can be calculated by the pressure measured
Degree, and be connected with Test Data Acquisition System；The upper water box, which extends interior of bucket, has hanger, and supply tank extends bucket dismounting
Welding uses.
Preferably, the lower header is by stainless bracing members, and there is stainless steel lacing wire inside with proof strength, accepts during experiment
From the clear water of experiment pipeline.Thermocouple is provided with inside lower header, for gathering water temperature；The lower header has discharge outlet and draining
Ball valve.
Preferably, the developmental tube route four stainless steel pipelines compositions, respectively DN80, DN150, DN200 and
DN250；It is divided into water absorbing section, horizontal segment and descending branch according to its position；The experiment pipeline water absorbing section is located in upper water box, including
Submersible type flowmeter and siphon destructive hole test section.
Preferably, siphon destructive hole test section has a siphon destructive hole of different-diameter, and selection is a kind of straight during experiment
The siphon destructive hole in footpath, and covered using anchor ear and rubber blanket and block up remaining siphon destructive hole, being provided with pressure below siphon destructive hole surveys
Point；The siphon destructive hole has gas flow surveying instrument.
Preferably, the experiment pipeline horizontal segment is stretched out outside upper water box, with being provided with venting ball before descending branch connecting bend
Valve, for testing front exhaust, make and clear water is full of in test loop；The experiment pipeline descending branch is fixed on each layer stand, by edge
Journey hydraulic friction test section, dismountable highness change section and orifice plate butterfly valve section composition.
Preferably, it is described to be located at the following waterflow stabilization section of elbow along journey hydraulic friction test section, provided with upper and lower two pressure
Measuring point；Acrylic transparent section can be replaced by as desired along journey hydraulic friction test section, provided with gas phase in conducting probe detection pipes
Volume fraction, use fluidised form in high-speed camera shooting pipe.
Preferably, dismountable highness change section has two sections, is connected, can be controlled by dismantling respective lines by flange
The siphon discrepancy in elevation needed for system.
Preferably, the orifice plate butterfly valve section has the gentle dynamic butterfly valve of one piece of resistance orifice plate, resistance positioned at experiment pipeline bottom
Orifice plate can match the resistance of engineering pipeline in practice, and Pneumatic butterfly valve can be with the beginning of Control experiment.
Preferably, the water return pipeline is in parallel by two depot sidings, is fetched water by water pump from lower header to upper water box during experiment；
Wherein one section of return piping is made up of centrifugal pump, regulating valve and flowmeter；Another section of return piping is by horizontal double sucking pump, bypass pipe
Line, regulating valve and flowmeter composition, bypass line and regulating valve can synergic adjustment circling water flow rates.
Preferably, the overflow blowoff line is connected with upper water box, is higher by the clear water of overflow baffle from overflow blowoff line
Lower header is flowed to, while bucket is extended with upper water box by the blow-off pipe provided with Blowoff ball valve and is connected, for discharging in upper water box
Water.
Preferably, instrument and control system includes Pneumatic butterfly valve controlling switch, regulating valve, pressure differential pressure pickup, temperature
Sensor, liquid level sensor, flowmeter and conducting probe signal；The signal collected is：Pressure letter in water tank extension
Number, the pressure signal before siphon destructive hole, visit along the pressure difference signal before and after the pressure difference signal, orifice plate of journey friction test section, conductance
The conductivity signal and flowmeter flow signal that pin measures.
Compared with prior art, the invention has the advantages that：
Siphon destructive experimental study system provided by the invention, the siphon destructive hole needed for testing engineering size pipeline are straight
Footpath, influence of the factor such as the siphon discrepancy in elevation, downstream pipe resistance to siphon destructive phenomenon is probed into, to biphase gas and liquid flow caused by negative pressure
Carry out visualization study of flow patterns, the solution of more science is provided for siphon destructive problem in engineering.
Siphon destructive experimental study system provided by the invention, employ and meet the 1 of engineering reality：1 experiment, is comprehensively examined
Having considered influences the various factors of siphon destructive phenomenon, and stand loop is reasonable in design, and employs the mode of visual observation, experiment
Theoretical research and engineering verification are combined by research system, and applicability is wider, and reliability is higher.
Brief description of the drawings
Fig. 1 is the structural representation for the siphon destructive experimental study system for meeting the embodiment of the present invention.
Wherein 1 is upper water box, and 2 be magnetic double level gauge, and 3 be siphon destructive hole test section, and 4 be submersible type Electromagnetic Flow
Meter, 5 be blast pipe and ball valve, and 6 be that 7 and 8 be dismountable highness change section, and 9 be orifice plate butterfly valve along journey hydraulic friction test section
Section, 10 be orifice plate, and 11 be Pneumatic butterfly valve, and 12 be that upper water box extends bucket, and 13 be that return piping 1,14 is that return piping 2,15 is
Blow-off pipe, 16 be Blowoff ball valve, and 17 be flowmeter, and 18 be flowmeter, and 19 be overflow blow-off pipe, and 20 be regulating valve, and 21 be regulation
Valve, 22 be centrifugal pump, and 23 be that horizontal double sucking pump bypasses, and 24 be regulating valve, and 25 be horizontal double sucking pump, and 26 be lower header, under 27 are
Water tank blow-off pipe and Blowoff ball valve.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
As shown in figure 1, the embodiments of the invention provide a kind of siphon destructive experimental study system, including：Protected with cat ladder
The stand main body on column and dismounting platform, the upper water box 1 with magnetic double level gauge 2 and extension bucket 12, with blow-off pipe 27
Lower header 26, the experiment pipeline with flowmeter 4 and siphon destructive hole test section 3, there are two return pipings 13,14 in parallel
Water return pipeline, overflow blowoff line 19.
Wherein, upper water box 1 is fixed with stand main body using bolt, and welded seal is used with experiment pipeline.
Test pipeline water absorbing section to be supported by the bottom steel frame of upper water box 1, siphon destructive hole test section 3 and experiment pipeline water absorbing section
By clamp connection.Prolong journey hydraulic friction test section 6, dismountable highness change section 7,8 is connected with orifice plate butterfly valve section using flange.
Water return pipeline is made up of two return pipings 13 and 14 in parallel, and for for the moisturizing of upper water box 1, its flow value can be with
Experiment pipeline flow value matches.Return piping 13 is made up of flowmeter 17, control valve 20 and centrifugal pump 22, return piping 14
It is made up of flowmeter 18, regulating valve 21, double suction horizontal pump 25, horizontal pump bypass 23 and bypass valve 24, horizontal pump bypass 23
Can the regulation circling water flow rate of synergic adjustment valve 21.Connecting hose is equipped with before and after double suction horizontal pump 25 to reduce the vibration of pump operation.
Overflow blowoff line 19 is available for the water in upper water box 1 more than overflow baffle to flow into lower header, to maintain in upper water box
Highest level stability, while upper water box extend bucket 12 be connected into overflow blowoff line 19 provided with blow-off pipe 15, provided with ball valve 16
Supply and discharge sky upper water box liquid and upper water box cleaning.
Fetched water during experiment by water return pipeline to upper water box 1, until reaching spilling water baffle position, open air bleeding valve 5 so that
Water is full of in experiment pipeline, decides whether to fetch water to upper water box 1 by water return pipeline depending on test situation, experiment acquisition system starts
Test data is recorded, Pneumatic butterfly valve 11 is opened, siphon destructive on-test, treats that the liquid level of upper water box 1 is dropped to below siphon destructive hole
When, there is air to enter experiment pipeline, now test the biphase gas and liquid flow for remaining stable in pipeline, the liquid level of upper water box 1 continues to decline
And stop when reaching certain liquid level, siphonage is destroyed, siphon destructive off-test.
The embodiment of the present invention has the advantages that：
Siphon destructive experimental study system provided in an embodiment of the present invention, the siphon destructive needed for testing engineering size pipeline
Bore dia, influence of the factor such as the siphon discrepancy in elevation, downstream pipe resistance to siphon destructive phenomenon is probed into, to gas-liquid two caused by negative pressure
Mutually stream carries out visualization study of flow patterns, and the solution of more science is provided for siphon destructive problem in engineering.
Siphon destructive experimental study system provided in an embodiment of the present invention, employ and meet the 1 of engineering reality：1 experiment, entirely
Considering to face influences the various factors of siphon destructive phenomenon, and stand loop is reasonable in design, and employs the side of visual observation
Theoretical research and engineering verification are combined by formula, experimental study system, and applicability is wider, and reliability is higher.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For system disclosed in embodiment
For, due to corresponding to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Those skilled in the art can realize described function using distinct methods to each specific application, but
It is this realization it is not considered that beyond the scope of this invention.
Obviously, those skilled in the art can carry out the spirit of various changes and modification without departing from the present invention to invention
And scope.So, if these modifications and variations of the present invention belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to including these changes and modification.
Claims (13)
- A kind of 1. siphon destructive experimental study system, it is characterised in that including：Stand main body, upper water box, lower header, developmental tube Road, water return pipeline, overflow blowoff line, instrument and control system；Because siphonage, the water of the upper water box are flow to during experiment The lower header, when liquid level drops to below siphon destructive hole, air is inhaled into the experiment pipeline, with the upper water box Liquid level constantly declines, and the share shared by the air of suction is continuously increased, until siphonage terminates, off-test；Therebetween, each pressure Force information, liquid level information and flow information are logged in acquisition system.
- 2. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the stand main body is formed from steel, Bottom is equipped with ground, supports whole test loop；The stand total height reaches 20 meters, and fluid flow reaches 1000 ton hours, Subjects pipeline diameter can reach DN250；The stand main body has the cat ladder for being available for personnel to climb and protection railing, is provided with Anti-fall device is with protection staff safety；The stand main body has four layer operation platforms, and the dismounting of pipeline are tested in one two three layers of confession, Top layer supports upper water box, and operating platform is surrounded by anti-falling railing.
- 3. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the upper water box is by stainless steel There is stainless steel lacing wire with proof strength into, inside, fill with clear water during experiment, liquid level there is not overtesting pipeline horizontal segment；The upper water Box installed has magnetic double level gauge, has transporting function, and liquid level signal can be converted into the voltage letter needed for experiment acquisition system Number；There is Height Adjustable overflow baffle inside the upper water box, upper water box liquid level can be maintained to a stable position；It is described Upper water box one side is equipped with pressure-bearing observation window, is available for personnel's viewing or video camera shooting upper water box inner case；The upper water box tool There is extension bucket, inside can accommodate all experiment pipelines, be welded with upper water box；The upper water box, which extends bucket side, has pressure Measuring point, the height of upper water box liquid level can be calculated by the pressure measured, and is connected with Test Data Acquisition System；The upper water Case, which extends interior of bucket, has hanger, and supply tank extends bucket dismounting welding and used.
- 4. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the lower header is by stainless steel branch There is stainless steel lacing wire support, inside with proof strength, accept the clear water from experiment pipeline during experiment.Thermoelectricity is provided with inside lower header It is even, for gathering water temperature；The lower header has discharge outlet and drainage ball valve.
- 5. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the developmental tube route four is stainless Steel pipe road forms, respectively DN80, DN150, DN200 and DN250；It is divided into water absorbing section, horizontal segment and descending branch according to its position； The experiment pipeline water absorbing section is located in upper water box, including submersible type flowmeter and siphon destructive hole test section.
- 6. siphon destructive experimental study system as claimed in claim 1, it is characterised in that siphon destructive hole test section has There is a siphon destructive hole of different-diameter, a kind of siphon destructive hole of diameter is selected during experiment, and covered using anchor ear and rubber blanket stifled Remaining siphon destructive hole, siphon destructive hole lower section are provided with pressure-measuring-point；The siphon destructive hole has gas flow surveying instrument.
- 7. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the experiment pipeline horizontal segment stretches out Outside upper water box, with being provided with venting ball valve before descending branch connecting bend, for testing front exhaust, make and clear water is full of in test loop； It is described experiment pipeline descending branch be fixed on each layer stand, by along journey hydraulic friction test section, dismountable highness change section and Orifice plate butterfly valve section forms.
- 8. siphon destructive experimental study system as claimed in claim 7, it is characterised in that described along journey hydraulic friction test section Positioned at the following waterflow stabilization section of elbow, provided with upper and lower two pressure-measuring-points；It can be changed as desired along journey hydraulic friction test section For acrylic transparent section, provided with gaseous phase volume fraction in conducting probe detection pipes, fluidised form in high-speed camera shooting pipe is used.
- 9. siphon destructive experimental study system as claimed in claim 7, it is characterised in that dismountable highness change section There are two sections, connected by flange, the required siphon discrepancy in elevation can be controlled by dismantling respective lines.
- 10. siphon destructive experimental study system as claimed in claim 7, it is characterised in that the orifice plate butterfly valve section is positioned at examination Pipeline bottom is tested, there is a gentle dynamic butterfly valve of one piece of resistance orifice plate, resistance orifice plate can match the resistance of engineering pipeline in practice, gas Dynamic butterfly valve can be with the beginning of Control experiment.
- 11. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the water return pipeline is by two sections of pipes Line parallel, fetched water by water pump from lower header to upper water box during experiment；Wherein one section of return piping is by centrifugal pump, regulating valve and stream Gauge forms；Another section of return piping is made up of horizontal double sucking pump, bypass line, regulating valve and flowmeter, bypass line and tune Saving valve can synergic adjustment circling water flow rate.
- 12. siphon destructive experimental study system as claimed in claim 1, it is characterised in that the overflow blowoff line with it is upper Water tank is connected, and the clear water for being higher by overflow baffle flows to lower header from overflow blowoff line, while passes through the row provided with Blowoff ball valve Dirt pipe extends bucket with upper water box and is connected, for discharging the water in upper water box.
- 13. siphon destructive experimental study system as claimed in claim 1, it is characterised in that instrument and control system includes gas Dynamic butterfly valve controlling switch, regulating valve, pressure differential pressure pickup, temperature sensor, liquid level sensor, flowmeter and conducting probe letter Number；The signal collected is：The pressure signal before pressure signal, siphon destructive hole in water tank extension, being rubbed along journey wipes The conductivity signal and flowmeter flow signal that pressure difference signal, the conducting probe tested before and after the pressure difference signal of section, orifice plate measure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710972472.7A CN107607406A (en) | 2017-10-18 | 2017-10-18 | A kind of siphon destructive experimental study system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710972472.7A CN107607406A (en) | 2017-10-18 | 2017-10-18 | A kind of siphon destructive experimental study system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612753A (en) * | 2018-11-16 | 2019-04-12 | 江苏大学 | A kind of siphon pipeline transportation performance testing stand |
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2017
- 2017-10-18 CN CN201710972472.7A patent/CN107607406A/en active Pending
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| CN109612753A (en) * | 2018-11-16 | 2019-04-12 | 江苏大学 | A kind of siphon pipeline transportation performance testing stand |
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