CN110849579A - Automatic particle scattering device suitable for towing tank PIV system - Google Patents
Automatic particle scattering device suitable for towing tank PIV system Download PDFInfo
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- CN110849579A CN110849579A CN201911142973.8A CN201911142973A CN110849579A CN 110849579 A CN110849579 A CN 110849579A CN 201911142973 A CN201911142973 A CN 201911142973A CN 110849579 A CN110849579 A CN 110849579A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/50—Mixing receptacles
- B01F35/514—Mixing receptacles the mixing receptacle or conduit being transparent or comprising transparent parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/23—Mixing of laboratory samples e.g. in preparation of analysing or testing properties of materials
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention relates to an automatic particle distribution device suitable for a PIV (particle image velocimetry) system of a towing tank, which belongs to the field of experimental devices and mainly comprises a composite particle stirring bin, a particle feeding telescopic pipeline, a pressure pump set and a support frame; the two particle throwing telescopic pipelines are arranged on the support frame and can move horizontally, and are connected with the water outlet of the particle stirring bin through two drainage pressure pumps; pond water is pumped into composite particle stirring storehouse by the water inlet through the pressure pump that draws water, adds after the appropriate amount of spike particle through the secondary stirring after through the particle put in flexible pipeline and send to below hollow blade department, causes hollow blade to rotate by the trailer motion, the tracer particle of even discharge can be according to specific experimental requirement control particle emission position and concentration.
Description
Technical Field
The invention relates to an automatic particle distribution device suitable for a PIV (particle image velocimetry) system of a towing tank, and belongs to the field of experimental devices.
Background
When a piv (particle Image velocimetry) experiment is carried out in a towing tank, tracer particles with certain concentration are required to be scattered in water to measure experimental data, and meanwhile, the particle scattering quality has extremely high requirements, so that a particle scattering device capable of providing high particle scattering effect is required.
The existing towing tank tracer particle scattering device has a plurality of technical defects and shortcomings:
1. the actual operation process is loaded down with trivial details, need earlier in the box with the artifical stirring of water reintroduction box of particle when pouring into the particle in the box, liquid splashes appear easily in the operation process, and there is the potential safety hazard in this operation on the great trailer of electrical equipment density.
2. Mostly be single-axis agitator in the stirring storehouse of particle, its ability that produces the torrent pulsation is limited, and unable very even messenger trace particle mixes with water, spills the in-process at the particle and has the phenomenon of trace particle caking discharge, reduces the utilization ratio of trace particle.
3. The particle scattering is mainly realized by discharging particle solution in a water tank through fixed holes of the fixed scattering pipes, the scattering effect is uneven, the particle scattering width range is large, a large amount of particle solution is wasted, the particle solution needs to be supplemented more frequently, and the working cost of the test is increased.
4. The spreading depth is adjusted by mainly depending on a lead screw to realize up-and-down movement, the movable range is limited by the length of the lead screw, the installation length of the lead screw is limited by the building height and the structural strength, and the spreading depth is far from insufficient in tests with high requirements on the particle spreading depth, such as PIV measurement of a flow field of an underwater vehicle.
In view of the above technical drawbacks and deficiencies, a need exists for a better towing tank tracer particle scattering device.
Disclosure of Invention
The invention provides an automatic particle distribution device suitable for a PIV (particle image velocimetry) system of a towing tank, and aims to apply the automatic particle distribution device to a model flow field measurement test based on a PIV technology in various towing tanks.
The technical scheme of the invention is as follows:
the utility model provides an automatic particle scattering device suitable for drag water pond PIV system, mainly includes compound particle stirring storehouse, flexible pipeline 4, pressure pump package and support frame 3 are put in to the particle, wherein:
the composite particle stirring bin comprises: the stirring device comprises a pre-stirring bin 2, a main stirring bin 1, a water tank support 7, a stirring motor 9 and a stirring rod, wherein the two stirring bins are connected through a pipeline with a stirring bin connecting valve 11, a pre-stirring bin water inlet 14 and a particle throwing window 10 are arranged above the pre-stirring bin, a drain valve 13 and a pipe joint are arranged below the main stirring bin, the pipe joint is connected with a branch drain pipe 12, a first stirring motor is connected above the pre-stirring bin, a second stirring motor is connected above the main stirring bin, and an output shaft of the stirring motor enters the pre-stirring bin and the main stirring bin to be connected with a stirrer;
the flexible pipeline is put in to particle includes: the water-saving water pump comprises a hollow multistage sleeve-shaped piston rod 4c, a telescopic water pipe, a hollow paddle-shaped drainer 4e and a motor, wherein the telescopic water pipe is arranged inside the piston rod, one end of the telescopic water pipe is provided with a hose connector 4h, and the other end of the telescopic water pipe is fixed with the bottommost part of the piston rod and is in watertight connection with the paddle-shaped drainer; a scale steel cable 4g is arranged in the piston rod, one end of the scale steel cable is fixed at the bottom, and the other end of the scale steel cable is transmitted to a steel cable winding and unwinding motor 4b through a steel cable steering pulley block 4f to control winding and unwinding of the steel cable; the upper part and the lower part of the hollow multistage sleeve-shaped piston rod are connected with a supporting slide block 4d, wherein the supporting slide block at the upper part is also connected with a horizontal displacement motor 4 a;
the pressure pump group comprises a drainage pressure pump 5 and a water pumping pressure pump 6, the drainage pressure pump connects the branch drainage pipe of the main stirring bin with the particle throwing telescopic pipeline, and the water pumping pressure pump connects the pool water with the water inlet of the pre-stirring bin;
the support frame includes aluminium type frame 3a, fixed angle bar 3b and slide rail 3c, and the support frame is fixed on the trailer, and the flexible pipeline is put in to the particle passes through support slider and support frame sliding rail connection.
The invention also has the following features:
the pre-stirring bin is a fully transparent watertight bin, a built-in motor stirrer is connected with a first stirring motor, the stirring surface of the pre-stirring bin extends to the bottom of the bin from above the liquid level, and the stirring motor can rotate forwards and backwards alternately;
main stirring storehouse top is provided with breather valve 8, built-in double-shaft motor agitator, and the double-shaft motor agitator includes: the stirring device comprises a double-shaft stirring rod top fixing seat 15a, a motor rotating shaft connecting shaft 15b, a cross rod fixing seat 15c, a stirring blade 15d and a double-shaft stirring rod bottom fixing seat 15e, wherein turbulent flow holes 15f are formed in the stirring blade, the motor rotating shaft connecting shaft is connected with a second stirring motor, a stirring surface of the stirring blade extends to the bottom of a bin from a liquid level, and a certain inclination is formed towards a central water outlet at the bottom of a box body.
The particle throwing telescopic pipelines are two or more groups, and can independently and horizontally move on the support frame slide rail under the control of a motor.
The hollow multistage sleeve-shaped piston rod has a certain dead weight and can vertically extend downwards by gravity in a free state.
The steel cable of the scale inside the hollow multi-stage sleeve-shaped piston rod is provided with a clear length scale.
Each blade surface of the hollow blade type drainer is provided with a drain hole 4i, and the joint of the hollow blade type drainer and the bottom end of the particle throwing telescopic pipeline can rotate freely.
The drainage flow of the two drainage pressure pumps can be freely controlled.
The automatic particle scattering device suitable for the PIV system of the towing tank provided by the invention has the advantages that:
1. the setting in pre-mixing storehouse has avoided current particle to scatter the loaded down with trivial details operating procedure that the device need stir tracer particle solution by oneself manually when using, and the full transparent pre-mixing storehouse still can observe the water injection water level in the water injection process after the pre-mixing is ended except can observing whether the particle stirs in advance evenly, makes whole process safer convenient. The tracer particle powder often can agglomerate and float on the liquid surface, and it is narrower to stir storehouse inner space in advance, and the stirring face extends to the bottom of the storehouse by more than the liquid level, and agitator motor forward passes the reversal and goes on in turn, can break up liquid level tracer particle agglomeration, accomplishes preliminary stirring completely evenly. The main stirring bin is wide in space, the double-shaft same-direction stirring device is arranged in the main stirring bin, and the single motor drives the double stirring rods to stir, so that the stirring range is larger, and the effect is better.
2. The design of a multistage sleeve-shaped piston rod for putting particles into a telescopic pipeline can meet the requirement of any scattering depth theoretically, the structure is simple, the occupied space is small, the telescopic water pipe is arranged in the piston rod and is connected with a paddle type drainer in a watertight manner, the telescopic ratio of the conventional telescopic water pipe can reach 1:3, the larger particle scattering depth under the normal condition can be met, the piston rod is connected with a motor through a scale steel cable, the motor rotates and controls the lifting of the motor through the self weight of the motor, and a graduated scale on the steel cable can accurately control the particle scattering depth.
3. The pressure pump group comprises a drainage pressure pump and a water pumping pressure pump, the drainage pressure pump connects a drainage pipe of the main stirring bin with the particle throwing telescopic pipeline, and the drainage flow can be manually controlled, so that the flow for distributing the particles is fixed, the requirements of specific tests on different particle concentrations are met, and the problems of flow reduction, particle concentration reduction and the like caused by insufficient water level of the water tank cannot occur; the water pump connects the pool water with the water inlet of the pre-stirring bin, so that the water level in the stirring bin can be controlled more conveniently.
4. The support frame is fixed on the trailer, two sets of or above particles are put in flexible pipeline and are fixed on the support frame slide rail, and can move by motor control horizontal, satisfy experimental requirement to the particle distribution different width scope, and two sets of means that can regard as the increase particle concentration when being nearer apart, when scattering the particle along with the trailer removal, because the rivers effect, hollow blade type drainer can rotate by oneself, evenly spread the tracer particle and reach small-amplitude stirring effect at predetermined track, make scattering of particle more even.
Drawings
FIG. 1 is a general block diagram of an automated particle distribution apparatus suitable for use in a towing tank PIV system;
FIG. 2 is a structural diagram of a composite particle stirring bin and a pressure pump set;
FIG. 3 is a detailed view of the composite particle stirring bin;
FIG. 4 is a view of the structure of a particle delivery telescopic pipe;
FIG. 5 is a partial enlarged view of a sliding block at the joint of the particle throwing telescopic pipeline and the support frame;
FIG. 6 is a detailed view of the particle throwing telescopic pipeline hollow paddle type drainer;
FIG. 7 is a view of the structure of the supporting frame;
FIG. 8 is a detail view of a single-shaft stirring rod in the pre-stirring bin;
FIG. 9 is a detailed view of the double-shaft co-rotating stirring rod in the main stirring bin.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention provides an automatic particle distribution device suitable for a PIV (particle image velocimetry) system of a towing tank, which mainly comprises a composite particle stirring bin, a particle feeding telescopic pipeline, a pressure pump set and a support frame, wherein the composite particle stirring bin is connected with the particle feeding telescopic pipeline; the two particle throwing telescopic pipelines are arranged on the support frame and can move horizontally, and are connected with the water outlet of the particle stirring bin through two drainage pressure pumps; pond water is pumped into composite particle stirring storehouse by the water inlet through the pressure pump that draws water, adds after the appropriate amount of spike particle through the secondary stirring after through the particle put in flexible pipeline and send to below hollow blade department, causes hollow blade to rotate by the trailer motion, the tracer particle of even discharge can be according to specific experimental requirement control particle emission position and concentration.
Referring to fig. 1-9, the present invention employs the following embodiments: firstly, the installation of the equipment: put in flexible pipe installation with the particle and on the slide rail of support frame, hoist support frame and compound particle stirring storehouse again and pull the suitable position of water tank trailer and fixed through connecting pieces such as angle steel, screw, avoid equipment to take place the skew. And connecting a water outlet of the water pumping pressure pump to a water inlet of the pre-stirring bin. And a branch drain pipe of the main stirring bin is connected with a particle throwing telescopic pipeline hose by using a drainage pressure pump, and the positions of two sets of particle throwing telescopic pipelines are adjusted and fixed according to test requirements, so that all connecting valves are in a closed state, and the installation work of the whole device is completed.
After the installation is finished, a proper amount of particles are poured into the pre-stirring bin through the particle putting window, a water inlet of the water pumping pressure pump is placed into the water pool, the water pumping pressure pump is opened to pump water, a power supply is disconnected after the water level in the pre-stirring bin is proper, and meanwhile, a stirring motor of the pre-stirring bin is opened to start stirring. Observing the stirring degree through the transparent wall surface of the pre-stirring bin, and opening a connecting valve of the stirring bin after the pre-stirring is uniform to allow the primarily stirred particle solution to enter the main stirring bin; opening a ventilation valve of the main stirring bin to balance the air pressure in the bin; the water pumping pressure pump is opened to start water injection, and the water injection condition can be observed through the transparent wall surface of the pre-stirring bin; meanwhile, a power supply of a stirring motor of the main stirring bin is connected, the main stirring motor is kept in a normally open state under the condition that particle solution exists in the main stirring bin, and the power of the motor can be adjusted according to the water storage amount in the bin; and (4) closing the water pumping pressure pump after the water injection amount is verified, and taking out the water inlet of the water pumping pressure pump from the water pool.
Calculating the particle scattering depth according to experimental requirements, loosening a steel cable by using a steel cable winding and unwinding motor to enable a throwing end of the particle throwing telescopic pipeline to sink, observing a scale on the steel cable, closing the steel cable to a proper position and fixing the winding and unwinding motor, and enabling the throwing end to reach a designated position;
opening a drainage valve of the main stirring bin, opening two drainage pressure pumps, adjusting to proper drainage power, starting a trailer at the same time, advancing at proper speed, starting the particle throwing-in end hollow paddle type drainer to rotate automatically and throw in particle solution, and finishing throwing in the particle solution when the trailer advances to the end of a test flow field; and then closing the pressure pump, closing the drain valve, controlling the steel cable take-up and pay-off motor to recover the steel cable, and lifting the particle throwing end out of the water surface. The multiple throwing process can be carried out according to the test requirement.
When the test is finished and the particles are not needed to be scattered, the particle throwing equipment is disassembled according to the reverse sequence during equipment installation, no residual solution is left in the equipment, and the equipment is covered by a dust cover and placed in a dry place.
Claims (6)
1. The utility model provides an automatic particle scattering device suitable for towing tank PIV system which characterized in that: including compound particle stirring storehouse, particle input telescopic tube way (4), pressure pump group and support frame (3), wherein:
the composite particle stirring bin comprises: the stirring device comprises a pre-stirring bin (2), a main stirring bin (1), a water tank support (7), a stirring motor (9) and a stirring rod, wherein the two stirring bins are connected through a pipeline with a stirring bin connecting valve (11), a pre-stirring bin water inlet (14) and a particle putting window (10) are arranged above the pre-stirring bin, a drain valve (13) and a pipe joint are arranged below the main stirring bin, the pipe joint is connected with a branch drain pipe (12), a first stirring motor is connected above the pre-stirring bin, a second stirring motor is connected above the main stirring bin, and an output shaft of the stirring motor enters the pre-stirring bin and the main stirring bin to be connected with a stirrer;
the flexible pipeline is put in to particle includes: the water-saving water pump comprises a hollow multistage sleeve-shaped piston rod (4c), a telescopic water pipe, a hollow paddle-shaped drainer (4e) and a motor, wherein the telescopic water pipe is arranged inside the piston rod, one end of the telescopic water pipe is provided with a hose connecting port (4h), and the other end of the telescopic water pipe is fixed to the lowest part of the piston rod and is in watertight connection with the paddle-shaped drainer; a scale steel cable (4g) is arranged in the piston rod, one end of the scale steel cable is fixed at the bottom, and the other end of the scale steel cable is transmitted to a steel cable winding and unwinding motor (4b) through a steel cable steering pulley block (4f) to control winding and unwinding of the steel cable; the upper part and the lower part of the hollow multistage sleeve-shaped piston rod are connected with a supporting slide block (4d), wherein the supporting slide block at the upper part is also connected with a horizontal displacement motor (4 a);
the pressure pump group comprises a drainage pressure pump (5) and a water pumping pressure pump (6), the drainage pressure pump connects the branch drainage pipe of the main stirring bin with the particle throwing telescopic pipeline, and the water pumping pressure pump connects the pool water with the water inlet of the pre-stirring bin;
the support frame includes aluminium type frame (3a), fixed angle bar (3b) and slide rail (3c), and the support frame is fixed on the trailer, and the particle is put in flexible pipeline and is passed through supporting slide and support frame sliding rail connection.
2. The automated particle distribution apparatus for a towing tank PIV system of claim 1, wherein: the pre-stirring bin is a fully transparent watertight bin, a built-in motor stirrer is connected with a first stirring motor, the stirring surface of the pre-stirring bin extends to the bottom of the bin from above the liquid level, and the stirring motor can rotate forwards and backwards alternately.
3. The automated particle distribution apparatus for a towing tank PIV system of claim 1, wherein: main stirring storehouse top be provided with breather valve (8), built-in double-shaft motor agitator, the double-shaft motor agitator includes: the stirring device comprises a double-shaft stirring rod top fixing seat (15a), a motor rotating shaft connecting shaft (15b), a cross rod fixing seat (15c), a stirring blade (15d) and a double-shaft stirring rod bottom fixing seat (15e), wherein turbulent flow holes (15f) are formed in the stirring blade, the motor rotating shaft connecting shaft is connected with a second stirring motor, a stirring surface of the stirring blade extends to the bottom of a bin from a liquid level, and a certain inclination is formed in the bottom of a box body towards a central water outlet.
4. The automated particle distribution apparatus for a towing tank PIV system of claim 1, wherein: the particle throwing telescopic pipelines are two or more groups, and the independent horizontal movement can be controlled by a motor on the support frame slide rail.
5. The automated particle distribution apparatus for a towing tank PIV system of claim 1, wherein: each blade surface of the hollow blade type drainer is provided with a drain hole (4i), and the joint of the drain hole and the bottom end of the particle throwing telescopic pipeline can rotate freely.
6. The automated particle distribution apparatus for a towing tank PIV system of claim 1, wherein: the scale steel cable is provided with a clear length scale.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911142973.8A CN110849579B (en) | 2019-11-20 | 2019-11-20 | Automatic particle scattering device suitable for towing tank PIV system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911142973.8A CN110849579B (en) | 2019-11-20 | 2019-11-20 | Automatic particle scattering device suitable for towing tank PIV system |
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| CN110849579A true CN110849579A (en) | 2020-02-28 |
| CN110849579B CN110849579B (en) | 2021-03-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871301A (en) * | 2020-07-16 | 2020-11-03 | 苏州德威尔卡光电技术有限公司 | Automatic particle scattering device for deep-water towing tank PIV |
| CN113640543A (en) * | 2021-06-29 | 2021-11-12 | 河海大学 | Automatic putting device and putting control method for tracer particles in unsteady flow |
| CN114894438A (en) * | 2022-06-08 | 2022-08-12 | 上海交通大学 | Experimental device for simulating particle suspension plume discharge |
| CN115046723A (en) * | 2022-08-15 | 2022-09-13 | 中国空气动力研究与发展中心高速空气动力研究所 | Loading device for preparing force measurement test and test method |
| CN115200835A (en) * | 2022-07-12 | 2022-10-18 | 中国船舶科学研究中心 | Tracer particle scattering device of vehicle-mounted PIV system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111871301A (en) * | 2020-07-16 | 2020-11-03 | 苏州德威尔卡光电技术有限公司 | Automatic particle scattering device for deep-water towing tank PIV |
| CN113640543A (en) * | 2021-06-29 | 2021-11-12 | 河海大学 | Automatic putting device and putting control method for tracer particles in unsteady flow |
| CN114894438A (en) * | 2022-06-08 | 2022-08-12 | 上海交通大学 | Experimental device for simulating particle suspension plume discharge |
| CN115200835A (en) * | 2022-07-12 | 2022-10-18 | 中国船舶科学研究中心 | Tracer particle scattering device of vehicle-mounted PIV system |
| CN115200835B (en) * | 2022-07-12 | 2023-09-15 | 中国船舶科学研究中心 | Trace particle scattering device of vehicle-mounted PIV system |
| CN115046723A (en) * | 2022-08-15 | 2022-09-13 | 中国空气动力研究与发展中心高速空气动力研究所 | Loading device for preparing force measurement test and test method |
| CN115046723B (en) * | 2022-08-15 | 2022-10-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Loading device for preparing force measurement test and test method |
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| CN110849579B (en) | 2021-03-30 |
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