CN113908970A - Heavy-medium shallow-slot intelligent heavy-medium density adjusting system based on machine vision - Google Patents
Heavy-medium shallow-slot intelligent heavy-medium density adjusting system based on machine vision Download PDFInfo
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- 239000007788 liquid Substances 0.000 claims abstract description 69
- 239000003245 coal Substances 0.000 claims abstract description 48
- 239000000725 suspension Substances 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 239000002956 ash Substances 0.000 claims abstract description 22
- 239000010883 coal ash Substances 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000006148 magnetic separator Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 14
- 230000001174 ascending effect Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 5
- 239000010878 waste rock Substances 0.000 claims 9
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000008400 supply water Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 description 10
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/40—Devices therefor, other than using centrifugal force of trough type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention provides a heavy medium shallow slot intelligent heavy medium density adjusting system based on machine vision. The clean coal ash content detection system comprises an ash content meter, the gangue coal rate detection system comprises a machine vision system, the medium combining barrel liquid level regulation system comprises a medium combining barrel, a feeding device, a liquid level sensor, a magnetic separator and a qualified medium pump, the horizontal flow pressure regulation system comprises a horizontal flow pressure sensor and a horizontal flow regulating valve, and the upflow pressure regulation system comprises an upflow pressure sensor and an upflow regulating valve; the invention calculates the ash content and the coal carrying rate of the gangue by using machine vision, adjusts the density of the suspension, adopts a simple control system to adjust the level and the upflow pressure and maintain the liquid level of the medium combining barrel, lightens the burden of field personnel and ensures the sorting effect and efficiency.
Description
Technical Field
The invention relates to the technical field of coal preparation equipment, in particular to a heavy medium shallow slot intelligent heavy medium density adjusting system based on machine vision.
Background
The heavy-medium shallow slot sorting machine mainly works according to the Archimedes' law. When coal is sorted, light products with density lower than that of a medium can float above the coal and flow to the overflow weir along with the force of horizontal flow, and the light products are clean coal; the product with high density compared with the working medium enters the bottom of the tank and is carried out of the separator by the chain scraper which runs slower, and the part of the product is called gangue. In order to ensure the high-efficiency separation of the heavy medium shallow slot separator, the heavy medium suspension liquid in the separator needs to be uniformly distributed.
The heavy-medium shallow slot separator is composed of a slot body, a gangue discharge scraper and a driving device thereof. The groove body of the dense medium separator is a long strip groove type metal structural member. And a feeding box and an overflow weir are respectively arranged on two sides of the long edge of the groove body. The bottom of the feeding box is provided with a medium flow pipe, and the dense medium suspension liquid in the heavy medium shallow slot sorting machine is generally input by dividing into two parts through a qualified medium pump. When the suspension enters the interior of the classifying trough, the liquid is divided into an ascending flow and a horizontal flow. The horizontal medium flow is used to maintain the liquid level and to maintain the density of the suspension in the tank constant, which facilitates the transportation of the floating clean coal. The medium is pumped into the tank body from the medium funnel at the bottom of the tank body to form ascending flow of the medium, so that the suspension is prevented from settling, and the suspension is uniformly distributed in the tank and used for keeping the stability of a flow field. Wear-resistant lining plates with a certain number of small holes are laid at the bottom of the tank body, two sides of the long side direction of the tank body are respectively provided with a scraper chain guide track, wear-resistant plates are arranged on the side walls of the tank body, and the scrapers move along the tracks to discharge heavy products from one end of the narrow side of the tank body.
However, when the heavy-medium shallow trough is used for separation, the separation effect is affected and economic loss is caused or subsequent processing operation is affected due to the fact that the density of suspension is changed by raw coal moisture or environmental interference, the horizontal flow pressure of ascending water is unreasonable and the like. The density of the dense-medium suspension liquid in the sorting machine is regularly detected by general workers, the average value of multiple detection results is used as a judgment basis, when the density of the suspension liquid does not meet corresponding requirements, the workers need to adjust the density of the dense-medium suspension liquid in time to ensure the sorting effect, and in addition, the workers need to control the pressure of the horizontal flow rising flow, so that the suspension liquid does not generate the phenomenon of turnover when the raw coal reaches an overflow groove after being thoroughly sorted in the shallow groove, and the material does not have the phenomenon of in-situ rotation. In addition, the situation that the liquid level of the medium mixing barrel is too high or too low to be adjusted exists on the site, and the continuous detection and corresponding operation of site personnel are required; the above operations not only consume manpower and material resources and have higher cost, but also cause a certain danger due to a poorer working environment of workers.
Disclosure of Invention
In view of the problems in the background art, the invention provides a system for intelligently adjusting the density of heavy medium through a heavy medium shallow groove based on machine vision, which comprises a clean coal ash content detection system, a gangue coal rate detection system, a medium combination barrel liquid level adjustment system, a horizontal flow pressure adjustment system, an upflow pressure adjustment system, a heavy medium shallow groove and a controller. Clean coal ash content detecting system includes ash content appearance, feed valve, gangue area coal rate detecting system includes machine vision system, flow divider, close bucket liquid level governing system including closing bucket, feeder, level sensor, magnet separator, qualified medium pump and flowing back valve, level flow pressure governing system includes level flow pressure sensor, level flow governing valve, upflow pressure governing system includes upflow pressure sensor, upflow governing valve, explains each subsystem below.
For clean coal ash detection systems: the ash content appearance is installed directly over transporting the clean coal belt, the ash content appearance can carry out the ash content to the clean coal of selecting separately and detect, send and give the controller, whether the controller judges the clean coal ash content of receiving is qualified, if the ash content is too big then the controller judges in proper order and receives horizontal flow pressure sensor with it is normal to go up stream pressure sensor's data, if normal, considers to lead to the clean coal ash content too big for suspension density this moment, controls the feed water valve to close and mediate the feed water bucket and reduce suspension density until qualified.
Further, the horizontal flow pressure sensor is installed in the horizontal flow pipeline, and the upflow pressure sensor is installed in the upflow pipeline.
Further, the water supply valve is installed on the water supply pipeline, and the opening degree of the water supply valve can be changed under the control of the controller, so that the density adjustment or the liquid level adjustment of the medium combining barrel is completed.
Further, the clean coal ash content detection system works according to the following steps:
the method comprises the following steps: and the ash content meter is used for carrying out ash content detection on the clean coal in the conveying clean coal belt area and uploading the clean coal to the controller.
Step two: and the controller analyzes and judges the received ash data information. If the ash content is unqualified, the controller judges whether the horizontal flow pressure and the upflow pressure are normal according to the data of the horizontal flow pressure sensor and the upflow pressure sensor; if the pressure is normal, the judgment is caused by the suspension density being too high.
Step three: and the controller adjusts the water feeding valve to feed water into the medium combining barrel according to the obtained information, so that the density of the suspension is reduced.
Step four: in the adjusting process, the opening of the water supply valve is continuously adjusted according to the controller, so that the accuracy of parameters is ensured, and the sorting effect and efficiency are ensured.
For the gangue belt coal rate detection system: the machine vision system can detect the coal carrying rate of the discharged gangue and send data to the controller, the controller analyzes and processes received information to judge whether the coal carrying rate of the gangue is qualified, if the coal carrying rate of the gangue is not qualified, the controller judges whether the horizontal flow pressure is normal according to the data fed back by the horizontal flow pressure sensor, if the horizontal flow pressure is normal, the controller controls the opening of the shunt valve to be increased or controls the feeding device to add magnetite powder into the medium combining barrel until the coal carrying rate of the gangue is judged to be qualified, and the medium density is qualified.
Further, the machine vision system is arranged right above the gangue transfer belt, can perform imaging processing on the whole area of gangue transfer, and transmits data to the controller.
Further, the shunt valve is arranged on the return pipe, and the opening degree of the shunt valve can be changed under the control of the controller, so that the suspension density adjustment is completed.
Further, the feeding device is connected with the controller and can receive a control signal and execute corresponding operation.
Further, the gangue belt coal rate detection system works according to the following steps:
the method comprises the following steps: and the machine vision system detects the coal carrying rate of the gangue in the transfer gangue belt area and sends data information to the controller.
Step two: and the controller analyzes and processes the received data information and calculates the coal carrying rate of the gangue. And if the coal carrying rate is not qualified, the controller judges whether the horizontal flow pressure is normal according to the data received from the horizontal flow pressure sensor, and if the horizontal flow pressure is normal, the controller judges that the suspension density is too low to cause the normal horizontal flow pressure.
Step three: and the controller adjusts the opening of the diverter valve according to the obtained information, or controls the feeding device to add magnetite powder into the medium combining barrel.
Step four: in the adjusting process, the controller continuously adjusts the opening of the shunt valve or the feeding amount of the feeding device according to the coal rate of the gangue belt, so that the accuracy of parameters is ensured, and the sorting effect and efficiency are ensured.
For the joint medium barrel liquid level adjusting system: the medium combining barrel is respectively connected with the horizontal flow pipeline and the ascending flow pipeline through the qualified medium pump, suspension liquid is divided into ascending flow and horizontal flow and enters the heavy medium shallow groove, the liquid level sensor detects the liquid level in the medium combining barrel and transmits data to the controller, and the controller judges whether the liquid level in the medium combining barrel is too high or too low; if the liquid level is too high, the controller controls the liquid discharge valve to open and discharge part of the suspension, and the liquid discharge valve is closed after the liquid level returns to a normal interval. If the liquid level is too low, the controller controls the water feed valve and the feeding device to respectively add water and magnet mineral powder to the medium combining barrel according to a certain proportion until the liquid level returns to a normal interval.
Further, the liquid level sensor is installed and closes and mediate the bucket, can to close and mediate the liquid level in the bucket and monitor to with liquid level data upload to the controller.
Further, the drain valve is installed on the medium combining barrel, and the opening degree of the drain valve can be changed under the control of the controller, so that the discharge of the suspension is completed.
Further, the medium combining barrel liquid level adjusting system works according to the following steps:
the method comprises the following steps: the liquid level sensor detects the liquid level in the medium combining barrel and sends data information to the controller.
Step two: the controller analyzes and judges the received data information, if the liquid level is judged to be too high, the controller controls the liquid discharge valve to open and discharge partial suspension, and after the liquid level returns to a normal interval, the liquid discharge valve is closed; and if the liquid level is too low, the controller controls the water feed valve and the feeding device to respectively add water and magnet mineral powder to the medium combining barrel according to a certain proportion until the liquid level returns to a normal interval.
Step three: and in the adjusting process, the liquid discharge valve and the feeding device are continuously adjusted according to the signals of the liquid level sensor, so that the accurate parameters are ensured, and the stable liquid level of the medium combining barrel is ensured.
For the horizontal flow pressure regulation system: the horizontal flow pressure sensor detects horizontal flow pressure and transmits pressure data to the controller, when horizontal flow is too large, the controller controls the horizontal flow regulating valve to reduce the opening, and when the horizontal flow is small, the controller controls the horizontal flow regulating valve to increase the opening.
Further, the horizontal flow pressure sensor is installed in a horizontal flow pipe and uploads data to the controller.
Further, the controller can analyze and judge the acquired data, and when the horizontal flow is judged to be too large, the controller controls the horizontal flow regulating valve to reduce the opening degree.
For an up-flow pressure regulation system: the upflow pressure sensor detects upflow pressure and transmits pressure data to the controller, when the upflow is too large, the controller controls the upflow regulating valve to reduce the opening, and when the upflow is too small, the controller controls the upflow regulating valve to increase the opening.
Further, the up-flow pressure sensor is installed in the up-flow pipe and uploads data to the controller.
Further, the controller can analyze and judge the acquired data, and when the upflow is judged to be overlarge, the controller controls the upflow regulating valve to reduce the opening degree.
Further, the upflow pressure regulating system operates according to the following steps:
the method comprises the following steps: and the upflow pressure sensor acquires upflow pressure data and uploads the data to the controller.
Step two: the controller analyzes and judges the received data information, if the rising flow is judged to be too large, the controller controls the rising flow regulating valve to reduce the opening, and when the rising flow is judged to be too small, the controller controls the rising flow regulating valve to increase the opening.
Compared with the prior art, the invention provides a system for intelligently adjusting the density of heavy media by using a heavy media shallow slot based on machine vision, which has the following beneficial effects:
1. the invention calculates the ash content of clean coal and the coal carrying rate of gangue by using a machine vision mode, judges whether the ash content and the coal carrying rate are qualified, automatically adjusts the density of the suspension liquid in time, has high accuracy and timely adjustment, avoids the condition that the density of the suspension liquid is not measured and adjusted manually in time, and can effectively ensure the working efficiency and the separation effect.
2. According to the invention, a simple control system is adopted to adjust the horizontal flow and the upward flow pressure and maintain the stable liquid level in the medium combining barrel, so that the traditional mode of manually distinguishing and manually intervening and adjusting is avoided, the working intensity of field workers is reduced, and the life safety of field operators is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a system for intelligently adjusting dense medium density by using a dense medium shallow slot based on machine vision;
FIG. 2 is a schematic structural diagram of a clean coal ash detection system of a heavy medium shallow slot intelligent heavy medium density adjusting system based on machine vision;
FIG. 3 is a schematic structural diagram of a gangue belt coal rate detection system of a heavy medium shallow slot intelligent heavy medium density adjustment system based on machine vision;
fig. 4 is a control flow chart of a heavy medium shallow slot intelligent heavy medium density adjusting system based on machine vision.
Wherein: 1. clean coal ash content detecting system, 2 gangue belt coal rate detecting system, 3, mix and mediate bucket liquid level governing system, 4, horizontal flow pressure governing system, 5, upward flow pressure governing system, 6, heavy-medium shallow slot, 7, controller, 8, ash content appearance, 9, water feed valve, 10, machine vision system, 11, flow divider, 12, mix and mediate bucket, 13, feeder, 14, level sensor, 15, magnetic separator, 16, qualified medium pump, 17, flowing back valve, 18, horizontal flow pressure sensor, 19, horizontal flow governing valve, 20, upward flow pressure sensor, 21, upward flow governing valve, 22, transfer clean coal belt, 23, water feed pipe, 24, transfer gangue belt, 25, back flow pipe, 26, horizontal flow pipeline, 27, upward flow pipeline.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, but the present invention may be implemented in other ways different from those described herein, and those skilled in the art may similarly generalize the present invention without departing from the spirit thereof, and thus the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 2, an embodiment of the present invention provides a system for intelligently adjusting dense medium density by using a dense medium shallow slot based on machine vision, which includes a clean coal ash detection system 1, a gangue coal rate detection system 2, a medium-combining barrel liquid level adjustment system 3, a horizontal flow pressure adjustment system 4, an up-flow pressure adjustment system 5, a dense medium shallow slot 6, and a controller 7. Clean coal ash content detecting system 1 includes ash content appearance 8, feed valve 9, gangue coal rate detecting system 2 includes machine vision system 10, flow divider 11, close bucket liquid level governing system 3 including closing bucket 12, feeder 13, level sensor 14, magnet separator 15, qualified medium pump 16 and flowing back valve 17 of mediating, horizontal flow pressure governing system 4 includes horizontal flow pressure sensor 18, horizontal flow governing valve 19, upflow pressure governing system 5 includes upflow pressure sensor 20, upflow governing valve 21.
As shown in fig. 2 to 4, the clean coal ash detection system 1 further includes a transfer clean coal belt 22 and a water supply pipe 23, the ash content meter 8 is arranged above the transfer clean coal belt 22 to detect clean coal ash content, data is transmitted to the controller 7, the controller 7 analyzes and processes received information to determine whether the clean coal ash content is qualified, if not, the controller 7 determines whether the pressure of an upward flow and a horizontal flow is normal according to the data of the upward flow pressure sensor 20 and the horizontal flow pressure sensor 18, and if so, the controller 7 controls the water supply valve 9 to add water into the medium combining barrel 12 to reduce the density of suspension.
As shown in fig. 1 and 3, the gangue coal-carrying rate detecting system 2 further includes a transfer gangue belt 24 and a return pipe 25, the machine vision system 10 is arranged above the transfer gangue belt 24 to detect the coal-carrying rate of the gangue, and send data to the controller 7, the controller 7 analyzes and processes the received information to determine whether the coal-carrying rate in the gangue is qualified, if not, the controller 7 determines whether the horizontal flow pressure is qualified according to the data of the horizontal flow pressure sensor 18, if so, the controller 7 controls the opening of the diverter valve 11 to increase or controls the feeding device 13 to add magnetite powder into the medium combining barrel 12 until the coal-carrying rate of the gangue is judged to be qualified, and the medium density is qualified.
As shown in fig. 1 and 4, the magnetic separator 15 is connected to the medium combining barrel 12 through the return pipe 25, the medium combining barrel 12 is connected to the horizontal flow pipe 26 and the upward flow pipe 27 through the qualified medium pump 16, the liquid level sensor 14 is mounted on the medium combining barrel 12, and can detect the liquid level in the medium combining barrel 12 and transmit data to the controller 7, and the controller 7 determines whether the liquid level in the medium combining barrel 12 is too high or too low; if the liquid level is too high, the controller 7 controls the liquid discharge valve 17 to open and discharge part of the suspension, and after the liquid level returns to a normal interval, the liquid discharge valve 17 is closed. If the liquid level is too low, the controller 7 controls the water feed valve 9 and the feeding device 13 to respectively add water and magnet mineral powder to the medium combining barrel 12 according to a certain proportion until the liquid level returns to a normal interval.
As shown in fig. 1 and 4, the horizontal flow pressure regulating system 4 further includes a horizontal flow pipe 26, the horizontal flow regulating valve 19 is installed in the horizontal flow pipe 26, the horizontal flow pressure sensor 18 is configured to detect a horizontal flow pressure and transmit pressure data to the controller 7, the controller 7 analyzes and judges received data information, if the horizontal flow is judged to be too large, the controller 7 controls the horizontal flow regulating valve 19 to decrease an opening degree, and when the horizontal flow is judged to be too small, the controller 7 controls the horizontal flow regulating valve 19 to increase the opening degree.
As shown in fig. 1 and 4, the upstream pressure regulating system 5 further includes an upstream pipeline 27, the upstream regulating valve 21 is installed on the upstream pipeline 27, the upstream pressure sensor 20 is configured to detect an upstream pressure and transmit pressure data to the controller 7, the controller 7 analyzes and judges received data information, if the upstream pressure is judged to be too large, the controller 7 controls the upstream regulating valve 21 to reduce the opening degree, and if the upstream pressure is judged to be too small, the controller 7 controls the upstream regulating valve 21 to increase the opening degree.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a heavy meson shallow slot intelligent regulation heavy meson density's system based on machine vision, includes clean coal ash content detecting system, waste rock area coal rate detecting system, closes bucket liquid level governing system, horizontal flow pressure governing system, upward flow pressure governing system, heavy meson shallow slot and controller, clean coal ash content detecting system includes ash content appearance and feed-water valve, waste rock area coal rate detecting system includes machine vision system and flow divider, close bucket liquid level governing system including closing bucket, feeder, level sensor, magnet separator, qualified medium pump and flowing back valve, horizontal flow pressure governing system includes horizontal flow pressure sensor and horizontal flow governing valve, upward flow pressure governing system includes upward flow pressure sensor and upward flow governing valve.
2. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: clean coal ash content detecting system still including transmitting clean coal belt and feed pipe, waste rock area coal rate detecting system still includes transmits waste rock belt and back flow.
3. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the horizontal flow pressure regulating system further comprises a horizontal flow pipeline, the upward flow pressure regulating system further comprises an upward flow pipeline, and the horizontal flow pipeline and the upward flow pipeline are respectively connected with the heavy-medium shallow groove.
4. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the ash content appearance set up in transmit clean coal belt top, machine vision system set up in transmit waste rock belt top.
5. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the horizontal flow regulating valve and the horizontal flow pressure sensor are assembled on the horizontal flow pipeline, and the ascending flow regulating valve and the ascending flow pressure sensor are assembled on the ascending flow pipeline.
6. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the water supply valve is assembled on the water supply pipe, and the flow dividing valve is assembled on the return pipe.
7. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the magnetic separator is connected with the medium combining barrel through the return pipe.
8. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the medium combining barrel is respectively connected with the horizontal flow pipeline and the ascending flow pipeline through the qualified medium pump.
9. The system for intelligently adjusting dense medium density of the dense medium shallow slot based on the machine vision is characterized in that: the clean coal ash content detection system, the gangue coal carrying rate detection system, the medium combining barrel liquid level adjusting system, the horizontal flow pressure adjusting system and the upflow pressure adjusting system are respectively connected with the controller.
10. A heavy medium shallow slot intelligent heavy medium density adjusting system based on machine vision is characterized by comprising the following steps:
the method comprises the following steps: the ash content appearance with machine vision system is right respectively it detects and the waste rock area coal rate detects to shift forward clean coal belt region and shift forward the product in the waste rock belt region and carry out the ash content to detect with the waste rock area coal rate, and with data information transmission to the controller, the controller calculates out clean coal ash content and waste rock area coal rate, simultaneously horizontal flow pressure sensor with upflow pressure sensor detects horizontal flow, upflow pressure respectively, level sensor detects close liquid level in the bucket of mediating, and with data transfer to the controller.
Step two: and the controller analyzes, judges and processes the received data information. The controller judges whether the received clean coal ash data is qualified, if the ash content is too large, the controller judges whether pressure signals received from the horizontal flow pressure sensor and the upflow pressure sensor are normal or not in sequence, if the pressure signals are normal, the condition that the suspension density is too large to cause the clean coal ash content is considered to be normal at the moment, and the controller controls the water supply valve to supply water to the medium combining barrel to reduce the suspension density until the suspension density is qualified. Meanwhile, the controller judges whether the coal carrying rate in the gangue is qualified, if not, the controller judges whether a pressure signal received from the horizontal flow pressure sensor is qualified, and if the pressure signal is normal, the controller controls the opening of the shunt valve to be increased or controls the feeding device to add magnetite powder into the medium combining barrel until the coal carrying rate and the medium density of the gangue are judged to be qualified; meanwhile, the controller judges whether the signal received from the liquid level sensor is too high or too low; if the liquid level is too high, the controller controls the liquid discharge valve to open and discharge part of the suspension, and the liquid discharge valve is closed after the liquid level returns to a normal interval. If the liquid level is too low, the controller controls the water supply valve and the feeding device to respectively add water and media to the medium combining barrel according to corresponding proportion until the liquid level returns to a normal interval. Meanwhile, the controller judges the sizes of horizontal flow and ascending flow, when the horizontal flow is judged to be too large, the controller controls the horizontal flow regulating valve to reduce the opening, and when the horizontal flow is judged to be too small, the controller controls the horizontal flow regulating valve to increase the opening; when the rising flow is judged to be too large, the controller controls the rising flow regulating valve to reduce the opening, and when the rising flow is judged to be too small, the controller controls the rising flow regulating valve to increase the opening.
Step three: in the adjusting process, the controller continuously adjusts the opening degrees of the horizontal flow adjusting valve, the upflow adjusting valve, the water feeding valve, the liquid discharge valve and the flow dividing valve according to signals received from the machine vision system, the ash content meter, the horizontal flow pressure sensor, the upflow pressure sensor and the liquid level sensor, and simultaneously controls the feeding device to add magnetite powder, so that the accurate parameters are ensured, and the sorting effect and efficiency are ensured.
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