CN113188950B - Trace chain detection method and device for tracking flow track and speed of bulk material - Google Patents
Trace chain detection method and device for tracking flow track and speed of bulk material Download PDFInfo
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- CN113188950B CN113188950B CN202110357250.0A CN202110357250A CN113188950B CN 113188950 B CN113188950 B CN 113188950B CN 202110357250 A CN202110357250 A CN 202110357250A CN 113188950 B CN113188950 B CN 113188950B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/42—Devices for emptying otherwise than from the top using belt or chain conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/44—Devices for emptying otherwise than from the top using reciprocating conveyors, e.g. jigging conveyors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
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Abstract
The invention relates to a tracer chain detection device for tracking the flow track and speed of bulk materials, which is characterized by comprising a vertical bulk material device for containing bulk materials, a tracer chain transmission system for tracking the flow of the bulk materials and a tracer chain detection system; the vertical bulk cargo device comprises a material bin, a material distributing mechanism and a discharge hopper, wherein the material distributing mechanism is arranged at the top of the material bin, the discharge hopper is arranged at the lower end of the material bin, bulk cargo enters the material bin through the material distributing mechanism in a material distributing manner, and is discharged from the bottom of the material bin through the discharge hopper; the front end tracer and the tail end marker in the tracer chain transmission system are connected through a pulley block and a lifting rope, the front end tracer is arranged in the storage bin, and the tail end marker is arranged outside the storage bin; the movement direction of the tail end marker in the tracing chain detection system is changed through the pulley block, the movement change of the tail end marker forms real-time flow parameters, and the real-time flow parameters are transmitted to the flow field calculation unit through the information transmission unit to calculate the flow track, the speed distribution, the residence time and the movement distance.
Description
Technical Field
The invention relates to a tracer chain detection method and device for tracking flow track and speed of bulk materials.
Background
Different from solid, gas and liquid, the dispersoid is a special existence form of substances, and mainly relates to the fields of mineral mining and selecting, processing, metallurgy, coal, coking, petrochemical, medicine, food, agriculture and the like, and research objects are sintered ore, pellet ore, scrap steel, slag, coke, ore, limestone, dolomite, medicine, food, grain and the like. The flow characteristic of dispersion, namely bulk material, and a detection method thereof are all the problems to be solved in the fields of dispersion science and engineering. The bulk material in the closed bin body flows under the action of gravity very easily to have a series of poor material flowing conditions such as funnel flow, segregation flow and the like, so that the bulk material is not smooth to discharge, is blocked, the bulk material flow is reduced, the particle size composition and the porosity of the bulk material in the bed layer are uneven and unstable, and the bulk material in a retention area is easy to be degraded or agglomerated. Especially when the bulk material is cooled or heated in the bulk material bed, the poor flow of the bulk material can lead to insufficient heat exchange between the bulk material and the heat exchange medium, so that the heat exchange efficiency of the bulk material bed is reduced, the purpose of cooling is not achieved by high Wen Sanliao, and a large amount of heat energy carried by the bulk material bed is not recovered sufficiently. Based on the problems, the development of novel and practical bulk material flow characteristic detection technology in a bulk material bed is particularly urgent.
The current detection method for the flow real-time characteristic of bulk materials mainly comprises the following two steps:
firstly, a center half-section dynamic detection method. According to the method, a transparent organic glass with a graduated scale is additionally arranged on a device for stacking bulk materials along a central axis, and the flow track and speed of the bulk materials are detected and analyzed by combining the graduated scale on the organic glass, so that the purpose of researching the flow characteristics of the bulk materials is achieved. The transparent organic glass is added into the semi-sectioning device, so that the observation is convenient, and the flow parameters (such as friction force, shearing stress, pressure and the like) of the bulk material and the organic glass can be measured. But the rheological, contact and flow characteristic parameters of the bulk material in the semi-split device are different from those of the bulk material in the whole device, the obtained flow streamline cannot reflect the actual flow characteristics, and the flow rule is deviated from the actual flow.
By combining the characteristics of the center semi-section dynamic detection method, some students adopt a static detection research method, in the method, after bulk materials continuously flow in the device for a plurality of hours, the bulk materials stop running, dig a material column with a certain height in the bulk material layer, perform state detection, and if the flow characteristics of the bulk materials in the bulk material bin are required to be observed globally, the whole bin device is required to be destroyed. The method can not detect the material flow, can not study the real-time transient transmission of the bulk material flow, and can not reflect the streamline change. Meanwhile, the investment cost is high, multiple purposes of one device cannot be realized, and repeated use of the single device cannot be realized.
And secondly, a particle image detection method. The method uses high resolution digital camera and video camera to record the position of particles in flow field, and analyzes the image to measure flow speed. The test object can be only transparent cylinder or half cylinder device, the color trace particles are scattered in the device, and the laser chip light source is used for incidence in the region of the measured flow field. The device dimensions are typically tens of centimeters, with radial thickness of only a few particle diameters. The method is suitable for a basic experiment for measuring the particle speed distribution of the fluidized bed in a laboratory or for researching the speed distribution of a limited number of visible trace particles in an open space, and is not suitable for pilot-scale or industrial experiments of the material flow characteristics of a bulk bed in a non-transparent device.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a tracing chain detection method and a tracing chain detection device for tracking the flow track and the speed of bulk materials, which can track the flow track and the speed of the bulk materials in real time and high efficiently and dynamically.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the tracer chain detection device for tracking the flow track and speed of bulk materials is characterized by comprising a vertical bulk material device for containing bulk materials, a tracer chain transmission system for tracking the flow of the bulk materials and a tracer chain detection system;
the vertical bulk cargo device comprises a material bin, a material distributing mechanism and a discharge hopper, wherein the material distributing mechanism is arranged at the top of the material bin, the discharge hopper is arranged at the lower end of the material bin, bulk cargo enters the material bin through the material distributing mechanism in a material distributing manner, and is discharged from the bottom of the material bin through the discharge hopper;
the tracer chain transmission system comprises a front-end tracer, a tail-end marker, a pulley block and a rope conveying controller, wherein the front-end tracer and the tail-end marker are connected through the pulley block and a lifting rope, the front-end tracer is arranged in a storage bin, and the tail-end marker is arranged outside the storage bin; the rope feeding controller is used for adjusting the use length of the lifting rope;
the tracer chain detection system comprises a display unit, an information acquisition and transmission unit and a flow field calculation unit, wherein the tail end marker keeps synchronous and equidirectional movement with the front end tracer through the pulley block and the rope conveying controller, and the movement change of the tail end marker forms real-time flow parameters which are transmitted to the flow field calculation unit through the information transmission unit to calculate the flow track, the speed distribution, the residence time and the movement distance, and the flow line, the flow velocity, the flow quantity and the change rule of the flow path, the flow quantity and the change rule of the flow velocity.
The tracer chain detection system further comprises a protective cover and a transmission unit, the front-end tracer is connected with the pulley block through the transmission unit, the protective cover is arranged above the storage bin, and the lower part of the distributing mechanism is provided with a plurality of tracer chain detection units.
The front-end tracers are more than one, are arranged in a point, line or plane mode along the bulk material layer, and keep a certain distance between the adjacent front-end tracers.
The material bin is internally provided with a flow changing device, and the structure can be changed according to the discharging condition.
The bulk material is bulk material formed by stacking powdery, block-shaped, spherical or granular particles together; the bulk materials are applied to the fields of mineral mining and selecting, processing, metallurgy, coking, medicine, food and agriculture, and sintered ore, pellet, scrap steel, slag, coke, ore, limestone, dolomite, medical products and grains can be used as application objects of the bulk materials.
The front-end tracer is selected from bulk particles or bulk clusters in a detected bulk bed.
The trace chain detection method for tracking the flow track and speed of bulk materials comprises the following steps:
1) Bulk materials in a bin of the vertical bulk material device flow through a distributing mechanism, a discharging hopper, a flow changing device, a bulk material bed height and a discharging flow, and flow form and speed distribution of the whole bulk material layer in the bin are controlled, so that the whole flow of bulk materials in the bin from top to bottom is realized;
2) The top of bulk cargo in the bin forms a bulk cargo bed, the front end tracer is embedded in the bulk cargo bed in advance, and the front end tracer in the bin is connected with the tail end marker outside the bin through a transmission unit, a pulley block and a lifting rope to form a tracer chain with one or more tracers linked with the marker; the front-end tracer moves downwards along with the movement of the bulk material bed, and the front-end tracer moves synchronously in real time and in the same direction outside the bin through the tail-end markers, so that the visualization of the front-end tracer outside the bin in the bin is realized, and the display unit records the position, displacement, streamline and time information of each tail-end marker in the whole course; the information acquisition and transmission unit adopts a particle image testing technology to track the flow behavior, speed distribution and change of the terminal marker and transmits the flow behavior, speed distribution and change to the flow field calculation unit;
3) When the discharging hopper is opened, the bulk material bed layer in the storage bin carries the front-end tracer to flow downwards under the action of gravity, and the flow field calculation unit calculates and gives out the flow track, speed distribution, residence time, moving distance, streamline, flow velocity, flow quantity and change rule of the flowing material at the designated position in real time according to the flow field information from the display unit.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, unknown material flow information in the bulk material bed layer is output to a two-dimensional or three-dimensional display unit outside the bin, so that the visualization of the material flow process in the bin is realized, and the transient measurement and undisturbed measurement of the full flow field are realized. The testing method is visual, visual and practical, has accurate and reliable testing data, and can be widely applied to the fields of mineral mining and selecting, processing, metallurgy, coal, coking, petrochemical, medicine, food, agriculture and the like. The method has the specific advantages that:
1. according to the invention, a plurality of bulk material particles or bulk material clusters are selected from a detected bulk material bed layer and used as front-end tracers of a tracer chain, other tracers capable of comprehensively reflecting the flow condition of the detected material can be selected, one or more tracers are arranged in a point, line or surface mode along the bulk material bed layer, and a certain interval is kept between adjacent front-end tracers; the front end tracer is arranged in the bulk material bed layer of the closed bin, and the motion transmission unit drives the tail end marker outside the bin to synchronously move in the same direction, so that the synchronous visualization of the material flow process in the bin is realized.
2. The invention connects the front end tracer in the bin with the end marker outside the bin through the transmission unit to form one or more tracer chains with the tracer linked, so as to track the flow behavior, speed distribution and change of the materials in the bulk material bed.
3. According to the invention, unknown material flow information in a bulk material bed layer is output to the outside of a bin through a tracing chain to be displayed in real time, and the change rules of the flow track, the flow velocity, the flow quantity and the like of the front-end tracer in the closed bin are calculated in real time through a display unit and a flow field calculation unit. The method realizes visualization of the material flowing process in the bulk bin, realizes the transition from a black box to a white box, and realizes transient measurement and undisturbed measurement of a full flow field. The method not only greatly improves the true reliability of the obtained bulk operation dynamic streamline, but also greatly saves time and economic cost.
4. The invention can realize repeated test of the material flow characteristic data under the influence of different structural parameters. Simple structure, easy to manufacture and assemble, and can also reform the existing equipment, and can realize multiple purposes of one device. Can realize large and medium-sized semi-industrial tests and can be widely applied to the fields of mineral mining and selecting, processing, metallurgy, coal, coking, petrochemical industry, medicine, food, agriculture and the like.
Drawings
Fig. 1 is a schematic structural view of a vertical bulk device.
Fig. 2 is a schematic diagram of a tracer chain drive system.
Fig. 3 is a schematic diagram of a tracer chain detection system.
Fig. 4 is a layout of a front end tracer.
In the figure: the device comprises a 1-vertical bulk material device 2-tracing chain transmission system 3-tracing chain detection system 4-storage bin 5-flow changing device 6-discharging unit 7-charging unit 8-distributing mechanism 9-discharging hopper 10-bulk material bed 11-front end tracer 12-transmission unit 13-end marker 14-pulley block 15-protective cover 16-rope feeding controller 17-information acquisition transmission unit 18-flow field calculation unit 19-display unit.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification, but it should be noted that the practice of the present invention is not limited to the following embodiments.
Referring to fig. 1-4, the tracer chain detection device for tracking the flow track and speed of bulk materials comprises a vertical bulk material device 1 for containing bulk materials, a tracer chain transmission system 2 for tracking the flow of the bulk materials, and a tracer chain detection system 3.
Referring to fig. 1, a vertical bulk cargo device 1 comprises a feed bin 4, a distributing mechanism and a discharge hopper 9, wherein the top of the feed bin 4 is provided with the distributing mechanism, the lower end of the feed bin 4 is provided with the discharge hopper 9, bulk cargo enters the feed bin 4 through the distribution mechanism, and is discharged from the bottom of the feed bin 4 through the discharge hopper 9; the discharge hopper 9 is connected with the discharge unit 6, and the discharge unit 6 includes a vibration discharge port and a conveyor belt, and whether the discharge is performed or not is controlled by the discharge unit 6. The charging unit 7 comprises a bucket elevator and an attached charging hopper for providing bulk material to the distributing mechanism for controlling the charging speed. The feed bin 4 is internally provided with a flow changing device 5, and the flow changing device 5 can be of a conical structure and is fixed at the center of the lower part of the feed bin 4. The bulk material in the storage bin 4 flows through the flow changing device 5 and changes the shape of the discharge hopper 9, so that the change of the flow track of the bulk material in the storage bin 4 is realized. The vertical bulk device 1 realizes high-efficiency dynamic research on different flowing states in the storage bin 4 by adjusting the structural parameters of a small number of parts. In the detection process, the height value of the tested bulk material bed layer 10 is kept unchanged by controlling the discharging unit 6 and the charging unit 7, the interference of the height change on the flow is reduced, and the consistency of bulk material flow rules is realized.
Referring to fig. 2-4, the tracer chain transmission system 2 comprises a front-end tracer 11, a tail-end marker 13, a pulley block 14 and a rope feeding controller 16, wherein the front-end tracer 11 and the tail-end marker 13 are connected through the pulley block 14 and a lifting rope, the front-end tracer 11 is arranged in the storage bin 4, and the tail-end marker 13 is arranged outside the storage bin 4. The front end tracer 11 and the tail end marker 13 realize synchronous downward movement through the rope feeding controller 16, the pulley block 14 and the lifting rope and can be connected in the mode shown in fig. 2, and the movement principle is that the upper limit of stress set by the rope feeding controller 16 is F 1 And is equal to the terminal marker 13 self weight m 1 g, F 1 ＝m 1 g, when the upper limit is exceeded, the rope feeding controller 16 automatically feeds the rope, and when the front end tracer 11 moves downwards, the end marker 13 is subjected to downward traction force F 2 At this time F 2 +m 1 g>F 1 At this time, the rope feeding controller 16 automatically feeds the rope, and the end marker 13 moves downward.
Referring to fig. 3, the tracer chain detection system 3 includes an information acquisition and transmission unit 17, a flow field calculation unit 18, and a display unit 19, wherein the end marker 13 keeps synchronous and same-directional movement with the front end tracer 11 through the pulley block 14, and the movement change of the end marker 13 forms a flow parameter, which is transmitted to the flow field calculation unit 18 through the information acquisition and transmission unit 17 to perform measurement and calculation of a flow track, a speed distribution, a residence time, a movement distance, a streamline, a flow velocity, a flow rate and a change rule thereof, so that the transition of bulk material flow in the storage bin 4 from a black box to a white box is realized.
Referring to fig. 2 and 3, the tracer chain detection device for tracking the flow track and speed of bulk materials further comprises a protective cover 15 and a transmission unit 12, wherein the front end tracer 11 is connected with the pulley block 14 through the transmission unit 12 and a lifting rope, so that the movement of the front end tracer 11 in the storage bin 4 is synchronously transmitted to the tail end marker 13 outside the storage bin 4, the flow visualization of bulk materials in the storage bin 4 is realized, and a foundation is provided for researching the flow rule of bulk materials in the storage bin 4. The protection casing 15 sets up in feed bin 4 top, and cloth mechanism's below. The transmission unit 12 is composed of a fixed pulley block 14, and a protective cover 15 is arranged above the fixed pulley block to prevent bulk materials from impacting the fixed pulley block and the lifting rope.
See fig. 3 and 4, wherein the number of the front end tracers 11 is more than one, the front end tracers 11 are arranged in a point, line or plane mode along the bulk material layer, and a certain distance is kept between the adjacent front end tracers 11, so that the multi-dimensional process study of the bulk material full flow field in the storage bin 4 is realized.
Referring to fig. 1-4, the front-end tracer 11 is a bulk particle or bulk mass selected in the bulk bed 10 to be detected, and the front-end tracer 11 and the end markers 13 move synchronously in the same direction, so that the position information of the end markers 13 represents the position of the front-end tracer 11 in the bin 4, and the information acquisition and transmission unit 17 acquires the position information of each front-end tracer 11 in the bin 4 by tracking the movement form of each end marker 13. The main component of the display unit may be a scale.
Referring to fig. 1-4, the trace chain detection method for tracking the flow track and speed of bulk materials comprises the following steps:
1) Bulk materials in a bin 4 of the vertical bulk material device 1 flow through an adjusting distributing mechanism 8, a discharging hopper 9, a flow changing device 5, bulk material bed height and discharging flow, the flow form and speed distribution of the whole bulk materials in the bin 4 are controlled, and the whole flow of the bulk materials in the bin from top to bottom is realized;
2) The top of the bulk material in the bin 4 forms a bulk material bed layer 10, a front end tracer 11 is embedded in the bulk material bed layer 10 in advance, the front end tracer 11 in the bin 4 is connected with a tail end marker 13 outside the bin 4 through a transmission unit 12, a lifting rope and a pulley block 14, and one or more tracer chains with which the markers are linked are formed;
the front end tracer 11 can move downwards along with the downward movement of the bulk material bed 10 due to dead weight, the tail end marker 13 connected with the front end tracer 11 synchronously moves in the same direction outside the bin 4 under the drive of the lifting rope, the movement state of bulk materials in the bin 4 is known through the movement condition of the tail end marker 13, and the visualization of the front end tracer 11 in the bin 4 outside the bin 4 is realized. According to experiments, a plurality of groups of tracer chain transmission systems 2 can be arranged at the edge of the bin 4 or at the center of the bin 4, and the tracer chain transmission systems 2 in each group are mutually independent and do not affect each other.
At the beginning of detection, the terminal marker 13 is adjusted to the zero point marker of the display unit 19, and in the downward movement process of the terminal marker 13, the information acquisition and transmission unit 17 adopts the current mainstream particle image testing technology to transmit real-time flow parameters to the flow field calculation unit 18 for flow track, speed distribution, residence time, moving distance, streamline, flow velocity, flow quantity and other measurement and calculation of the change rule thereof.
3) When the discharging hopper 9 is opened, the bulk material bed 10 in the storage bin 4 carries the front-end tracer 11 to flow downwards under the action of gravity, and the flow field calculation unit 18 calculates and gives out the flow track, speed distribution, residence time, moving distance, streamline, flow velocity, flow quantity and change rule of the flowing material at the designated position in real time according to the flow field information from the information acquisition and transmission unit 17.
Claims (6)
1. The tracer chain detection device for tracking the flow track and speed of bulk materials is characterized by comprising a vertical bulk material device for containing bulk materials, a tracer chain transmission system for tracking the flow of the bulk materials and a tracer chain detection system;
the vertical bulk cargo device comprises a material bin, a material distributing mechanism and a discharge hopper, wherein the material distributing mechanism is arranged at the top of the material bin, the discharge hopper is arranged at the lower end of the material bin, bulk cargo enters the material bin through the material distributing mechanism in a material distributing manner, and is discharged from the bottom of the material bin through the discharge hopper;
the tracer chain transmission system comprises a front-end tracer, a tail-end marker, a pulley block and a rope conveying controller, wherein the front-end tracer and the tail-end marker are connected through the pulley block and a lifting rope, the front-end tracer is arranged in a storage bin, and the tail-end marker is arranged outside the storage bin; the rope feeding controller is used for adjusting the use length of the lifting rope;
the tracer chain detection system comprises a display unit, an information acquisition and transmission unit and a flow field calculation unit, wherein the tail end marker keeps synchronous and same-direction movement with the front end tracer through the pulley block and the rope conveying controller, and the movement change of the tail end marker forms real-time flow parameters which are transmitted to the flow field calculation unit through the information acquisition and transmission unit to calculate the flow track, the speed distribution, the residence time and the movement distance, and the flow line, the flow velocity, the flow quantity and the change rule of the flow path, the flow quantity and the change rule of the flow quantity;
the material bin is internally provided with a flow changing device, and the structure can be changed according to the discharging condition.
2. The tracer chain detection device for tracking the flow track and speed of bulk materials according to claim 1, wherein the tracer chain detection system further comprises a protective cover and a transmission unit, the front tracer is connected with the pulley block through the transmission unit, the protective cover is arranged above the storage bin, and the lower part of the distributing mechanism.
3. The tracer chain detection apparatus for tracking the flow path and velocity of bulk material according to claim 1, wherein the front end tracer is one or more, arranged in a point, line, or plane manner along the bulk material layer, and a certain distance is maintained between adjacent front end tracers.
4. The tracer chain detection apparatus for tracking flow trace and velocity of bulk material according to claim 1, wherein the bulk material is bulk material in which powder, block, sphere or granular particles are piled together; the bulk materials are applied to the fields of mineral mining and selecting, processing, metallurgy, coking, medicine, food and agriculture, and sintered ore, pellet, scrap steel, slag, coke, ore, limestone, dolomite, medical products and grains can be used as application objects of the bulk materials.
5. A tracer chain detection apparatus for tracking the flow path and velocity of bulk material as claimed in claim 1, wherein the front end tracer is a bulk particle or bulk mass selected within the bulk bed being detected.
6. A tracer chain detection method for tracking the flow trajectory and speed of bulk materials by means of the device according to any one of claims 1 to 5, characterized in that it comprises the following steps:
1) Bulk materials in a bin of the vertical bulk material device flow through a distributing mechanism, a discharging hopper, a flow changing device, a bulk material bed height and a discharging flow, and flow form and speed distribution of the whole bulk material layer in the bin are controlled, so that the whole flow of bulk materials in the bin from top to bottom is realized;
2) The top of bulk cargo in the bin forms a bulk cargo bed, the front end tracer is embedded in the bulk cargo bed in advance, and the front end tracer in the bin is connected with the tail end marker outside the bin through a transmission unit, a pulley block and a lifting rope to form a tracer chain with one or more tracers linked with the marker; the front-end tracer moves downwards along with the movement of the bulk material bed, and the front-end tracer moves synchronously in real time and in the same direction outside the bin through the tail-end markers, so that the visualization of the front-end tracer outside the bin in the bin is realized, and the display unit records the position, displacement, streamline and time information of each tail-end marker in the whole course; the information acquisition and transmission unit adopts a particle image testing technology to track the flow behavior, speed distribution and change of the terminal marker and transmits the flow behavior, speed distribution and change to the flow field calculation unit;
3) When the discharging hopper is opened, the bulk material bed layer in the storage bin carries the front-end tracer to flow downwards under the action of gravity, and the flow field calculation unit calculates and gives out the flow track, speed distribution, residence time, moving distance, streamline, flow velocity, flow quantity and change rule of the flowing material at the designated position in real time according to the flow field information from the display unit.
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| JPH0682332A (en) * | 1992-08-31 | 1994-03-22 | Nippon Steel Corp | Visualization method of minute tracer particles and tracking method thereof |
| JP2007139724A (en) * | 2005-11-22 | 2007-06-07 | Matsushita Electric Works Ltd | Flow field measuring method using particle tracing method |
| CN104772879A (en) * | 2015-04-07 | 2015-07-15 | 郑州大学 | Micro injection molding melt flow behavior visualized analysis detection system and method |
| CN105890871A (en) * | 2016-04-08 | 2016-08-24 | 北京航空航天大学 | Tracer particle putting device used for liquid flow field particle image velocimeter (PIV) measurement |
| CN108760234A (en) * | 2018-06-05 | 2018-11-06 | 哈尔滨工程大学 | A kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies |
| CN208805442U (en) * | 2018-08-08 | 2019-04-30 | 清华大学 | A Phosphorescent Particle Tracking Multipoint Measurement System |
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| US11280652B2 (en) * | 2016-12-06 | 2022-03-22 | National Institute Of Advanced Industrial Science And Technology | Flow velocity distribution measuring method and particle size measuring method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0682332A (en) * | 1992-08-31 | 1994-03-22 | Nippon Steel Corp | Visualization method of minute tracer particles and tracking method thereof |
| JP2007139724A (en) * | 2005-11-22 | 2007-06-07 | Matsushita Electric Works Ltd | Flow field measuring method using particle tracing method |
| CN104772879A (en) * | 2015-04-07 | 2015-07-15 | 郑州大学 | Micro injection molding melt flow behavior visualized analysis detection system and method |
| CN105890871A (en) * | 2016-04-08 | 2016-08-24 | 北京航空航天大学 | Tracer particle putting device used for liquid flow field particle image velocimeter (PIV) measurement |
| CN108760234A (en) * | 2018-06-05 | 2018-11-06 | 哈尔滨工程大学 | A kind of fluid flowing and solids movement synchronizing information test method and device based on PIV and PTV technologies |
| CN208805442U (en) * | 2018-08-08 | 2019-04-30 | 清华大学 | A Phosphorescent Particle Tracking Multipoint Measurement System |
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