CN116550191A - Device and method for intelligently regulating stirring effect in closed loop mode - Google Patents
Device and method for intelligently regulating stirring effect in closed loop mode Download PDFInfo
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- CN116550191A CN116550191A CN202310694961.6A CN202310694961A CN116550191A CN 116550191 A CN116550191 A CN 116550191A CN 202310694961 A CN202310694961 A CN 202310694961A CN 116550191 A CN116550191 A CN 116550191A
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- 238000003756 stirring Methods 0.000 title claims abstract description 192
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000000694 effects Effects 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 230000001276 controlling effect Effects 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
Classifications
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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
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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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
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2122—Hollow shafts
-
- 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
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2112—Level of material in a container or the position or shape of the upper surface of the material
-
- 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
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2214—Speed during the operation
- B01F35/22142—Speed of the mixing device during the operation
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention provides a device for intelligently regulating and controlling stirring effect in a closed loop manner, which comprises a stirrer, a driving motor and a controller, wherein the stirrer comprises a stirring shaft and a paddle, the stirring shaft is a hollow shaft, the paddle is sleeved outside the stirring shaft, a measuring float and a distance meter are arranged in an internal cavity of the stirring shaft, the measuring float can float on the surface of fluid and can move up and down freely in the cavity, and a limiting block is arranged at the bottom of the cavity; the distance measuring device is used for obtaining the position of the measuring floater; a laser range finder with an automatic scanning mechanism is arranged on the outer wall of the upper part of the stirring shaft. The device can detect the liquid level height at the slurry shaft of the stirring center and the shape of the stirring liquid level in real time, thereby intelligently adjusting the rotating speed of the paddle in a closed loop way, ensuring that the liquid level of the fluid keeps the designated height, preventing the problems of splashing, overflowing and the like, and fully playing the stirring effect. The invention also provides a method for intelligently and closely regulating and controlling the stirring effect.
Description
Technical Field
The invention belongs to the field of stirring machinery, and particularly relates to a device and a method for intelligently regulating and controlling stirring effect in a closed loop mode.
Background
The stirrer is a mechanical device for mixing and stirring various materials. The stirrer has wide application, and the stirrer has wide variety of types and types, and stirring mediums can be classified into liquid, solid and gas according to the physical properties of the stirring mediums, wherein the stirring mediums are mostly liquid or liquid-solid mixture.
In general, the main structure of the stirrer comprises a motor, a speed reducer, a frame and a stirrer, wherein the stirrer comprises a shaft coupling, a stirring shaft, the stirrer and the like, and the working principle of the stirrer is that the motor drives the stirring shaft and the stirrer to rotate, so that materials are mixed, turned over and dispersed in the stirrer, the materials are uniformly mixed, the heat transfer and the transmission strength are improved, the liquid and the liquid/gas are uniformly mixed, the solid and the liquid are dispersed, the crystallization is carried out, the solubility of the solid is improved, the heat transfer is improved and the like.
When the stirrer of the stirrer stirs steadily, the surface of the liquid can fluctuate. The steady-state fluid flow problem of the rotating machinery requires that the deformation condition of the free surface be calculated, the solution of the flow field be obtained according to the Navier-Stokes equation, and the shape and the height of the free liquid surface be explicitly calculated according to the speed field. It is well known that stable solution of Navier-Stokes equations and condition authenticity are world problems that have not been solved to date in the field of physics. Therefore, how to dynamically acquire stirring liquid level information and use the stirring liquid level information to realize intelligent closed-loop stirring control is a technical problem in the industrial field.
Particularly, for stirring of a mixture of liquid and liquid-solid, the stirring process can change the working condition, for example, the stirring can heat the fluid, further change the viscosity, density and other characteristics of the fluid, evaporation can also be generated to change the quantity of raw materials, and the characteristics of the materials can be completely changed along with the progress of chemical reaction.
The stirring speed (namely the rotating speed of the stirrer, hereinafter referred to as the rotating speed of the blade) of the existing stirrer is set by a pre-program, the stirring depth and the rotating speed of the blade cannot be intelligently adjusted along with the change of working conditions, and if the stirring depth is improper or the stirring speed is too high, the problems of splashing, overflowing and the like are easily caused, and if the stirring speed is too low, the stirring effect cannot be fully exerted, and the stirring efficiency is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the device for intelligently and closed-loop regulating and controlling the stirring effect, which can automatically detect the liquid level height at the stirring center shaft and the stirring liquid level shape in real time, thereby intelligently and closed-loop regulating the rotating speed of the paddle, keeping the specified height of the liquid level of the fluid, preventing the problems of splashing, overflowing and the like, and fully playing the stirring effect. The invention also provides a method for intelligently and closely regulating and controlling the stirring effect.
The invention is realized by the following technical scheme:
the device comprises a stirrer, a driving motor and a controller, wherein the stirrer comprises a stirring shaft and paddles, the stirring shaft is a hollow shaft, the paddles are sleeved outside the stirring shaft and driven by the stirring shaft to perform rotary motion, the stirring shaft is driven by the driving motor, and the starting and stopping of the driving motor and the rotating speed of the driving motor are controlled by the controller; a measuring float and a distance meter are arranged in the inner cavity of the stirring shaft, the measuring float can float on the surface of the fluid and can move up and down freely in the cavity, and a limiting block is arranged at the bottom of the cavity and used for preventing the measuring float from falling out of the stirring shaft; the distance measuring device is used for obtaining the position of the measuring floater; a laser range finder with an automatic scanning mechanism is arranged on the outer wall of the upper part of the stirring shaft, and the included angle between the outgoing measuring laser beam of the laser range finder and the stirring shaft can be regulated; the distance meter and the laser distance meter are connected with the controller in a wired or wireless mode.
Further, the range finder is arranged at the top of the stirring shaft cavity, and the range finder is a non-contact photoelectric range finder or an ultrasonic range finder.
Further, the range finder is arranged on the side wall of the cavity of the stirring shaft, the range finder is a pull rod type range finder or a pull rope type range finder, and one end of a range finding pull rod or a pull rope of the pull rod type range finder or the pull rope type range finder is connected with the end face of the measuring floater.
The invention also provides a method for intelligently regulating and controlling the stirring effect in a closed loop manner, which comprises the following steps:
(1) Pouring a stirring medium consisting of liquid or liquid-solid or liquid-gas mixture into a stirring container, waiting for the leveling stabilization of the liquid level, and placing a stirrer above the liquid level of the stirring medium before stirring begins;
(2) The stirrer is stretched into a stirring medium, a measuring float of a stirring shaft relatively rises from the bottom of the stirring shaft along with the increase of the stretching depth of the stirrer, the height position of the measuring float relative to the bottom of the stirring shaft is obtained in real time through a distance meter, namely the height of the measuring float, namely the stretching depth of the stirrer is measured, the stretching action of the stirrer is completed until the stretching depth reaches the preset stirring depth, and the height of the measuring float is recorded as H;
(3) Starting the stirrer to rotate, gradually accelerating stirring by the blade, gradually reducing the liquid level of the position where the measuring float is positioned because the free fluid flow of the stirring medium forms a concave liquid level taking the stirring shaft as the center, and monitoring the position H1 where the measuring float is positioned in real time;
(4) In the stirring process, precisely measuring in real time by a laser range finder to obtain the shape of the concave liquid surface, and calculating to obtain the liquid level height of the current concave liquid surface at the edge of the stirring container; comparing the current liquid level with the maximum allowable liquid level of the stirring container, and if the current liquid level is smaller than the maximum allowable liquid level, continuously increasing the rotating speed of the paddle; if the speed is greater than the preset speed, stopping accelerating or reducing the rotating speed of the blade, and if the speed is equal to the preset speed, keeping the current rotating speed of the blade;
when H1 is not changed any more or the up-down fluctuation range of H1 is smaller than the preset allowable fluctuation value, indicating that the blade has reached the optimal stable rotation speed and enters a stable stirring state, and stopping the adjustment of the rotation speed of the blade;
(5) Under the stable stirring state, calculating delta H=H-H1, and if delta H is larger than a preset depth allowable fluctuation value, correspondingly increasing the extending depth of the stirrer; returning to the step (4) to adjust the rotating speed of the blade again until the delta H is smaller than or equal to a preset depth allowable fluctuation value, and marking the H1 at the moment as a steady-state depth D;
(6) Continuously monitoring the position H1 of the measuring float in real time in the stirring process, if H1 is smaller than D and H1 continuously descends, indicating that the liquid level is descending, and repeatedly executing the steps (4) - (5) at the moment to realize automatic adjustment of stirring parameters;
(7) In the stirring process, stopping stirring at regular intervals of delta T, obtaining the position H1 of the measuring float after the fluid is static, calculating the volume change of the fluid in the stirring process by comparing H1 with H, and then repeatedly executing the steps (4) - (5) to realize automatic adjustment of stirring parameters.
Furthermore, if the materials are required to be dynamically added, the automatic adjustment of the stirring parameters can be realized by adopting the steps (4) - (5) without stopping stirring and monitoring the position of the measuring float in real time while adding.
The invention has the following beneficial effects:
1. according to the invention, the stirring shaft is designed into the hollow structure, and the measuring float and the distance meter are arranged in the hollow cavity, so that the liquid level position at the stirring center can be obtained in real time in the stirring process.
2. According to the invention, the laser range finder with the automatic scanning mechanism is arranged on the outer wall of the upper part of the stirring shaft, so that the included angle between the outgoing measuring laser beam of the laser range finder and the stirring shaft can be automatically changed, the distance between the laser range finder and the liquid level at different radial positions of the stirring container can be measured, the accurate shape of the concave liquid level can be obtained, and further, whether splashing and overflowing occur can be judged through the shape detection of the concave liquid level.
3. According to the invention, a closed-loop control system is formed among the controller, the driving motor, the stirring shaft, the measuring floater, the distance meter and the laser distance meter, and parameters such as the rotating speed of the blade, the stirring depth and the like are dynamically adjusted by obtaining the liquid level position at the stirring center and the accurate shape of the concave liquid level in real time, so that the optimal stable stirring parameters under the condition of no splashing and overflow are obtained.
4. The invention can intelligently adjust the stirring depth and the rotating speed of the blade under the condition of changing the stirring working condition (such as temperature rise of fluid, change of viscosity density of fluid and the like and evaporation of fluid), thereby preventing the problems of splashing, overflowing and the like and fully playing the stirring effect.
Drawings
Fig. 1 is a schematic structural diagram of a device for intelligently and closed-loop regulating and controlling stirring effect.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1, the invention provides a device for intelligently regulating and controlling stirring effect in a closed loop manner, which comprises a stirrer, a driving motor and a controller, wherein the stirrer comprises a stirring shaft 1 and a paddle 2, the stirring shaft 1 is a hollow shaft, the paddle 2 is sleeved outside the stirring shaft 1 and is driven by the stirring shaft 1 to perform rotary motion, the stirring shaft 1 is driven by the driving motor, and the starting and stopping and the rotating speed of the driving motor are controlled by the controller.
The inside cavity of the stirring shaft 1 is provided with a measuring float 3 and a distance meter 4, wherein the measuring float 3 can float on the surface of fluid and can move up and down freely in the cavity, and the bottom of the cavity is provided with a limiting block for preventing the measuring float 3 from falling out of the stirring shaft 1.
The distance measuring device 4 is used for obtaining the position of the measuring float 3, and can be arranged at the top of the cavity of the stirring shaft 1 or on the side wall of the cavity of the stirring shaft 1.
If the distance meter 4 is installed on the top, a non-contact electro-optical distance meter or an ultrasonic distance measuring radar is adopted, namely, the distance meter 4 emits a distance measuring beam or ultrasonic wave to the end face of the measuring float 3, the distance meter 4 returns after being reflected by the measuring float 3, and the distance between the measuring float 3 and the distance meter 4 is calculated through measuring time. If the distance measuring device 4 is arranged on the side wall, a pull rod/pull rope type distance measuring device is adopted, namely one end of a distance measuring pull rod/pull rope of the pull rod/pull rope type sensor is connected with the end face of the measuring float 3, and the measuring float 3 drives the distance measuring pull rod/pull rope to move up and down in a telescopic manner, so that the distance between the measuring float 3 and the distance measuring device 4 can be measured.
The controller is connected to the distance meter 4 by a wired or wireless means, so that the distance value measured by the distance meter 4 can be obtained. When the distance value does not meet the requirement, the controller controls the driving motor to change the rotating speed, so that the rotating speed of the stirring shaft 1 is changed, the position of the measuring float 3 is correspondingly changed, namely, the distance value measured by the distance meter 4 is changed, and the controller adjusts the rotating speed of the driving motor according to the distance value measured by the distance meter 4 again.
The laser range finder 5 with an automatic scanning mechanism is arranged on the outer wall of the upper part of the stirring shaft 1, so that the included angle between the laser beam and the stirring shaft 1 can be automatically changed when the laser range finder 5 emits and measures the distance between the laser range finder 5 and the liquid level at different radial positions of the stirring container, the accurate shape of the concave liquid level can be obtained, and whether splashing and overflowing occur can be judged through the shape detection of the concave liquid level. The controller is connected with the laser range finder 5 by a wired or wireless mode. A closed-loop control system is formed between the controller, the drive motor, the stirring shaft 1, the measuring float 3, the distance meter 4 and the laser distance meter 5.
The invention also provides a method for intelligently regulating and controlling the stirring effect in a closed loop manner, which comprises the following steps:
(1) Pouring a stirring medium consisting of liquid or liquid-solid or liquid-gas mixture into a stirring container, waiting for the leveling stabilization of the liquid level, and placing a stirrer above the liquid level of the stirring medium according to the setting before stirring begins;
(2) The stirrer is stretched into a stirring medium, the measuring float 3 of the stirring shaft 1 relatively rises from the bottom of the stirring shaft 1 along with the increase of the stretching depth of the stirrer, the height position of the measuring float 3 relative to the bottom of the stirring shaft 1 (the height of the measuring float 3 for short) can be obtained in real time through the distance meter 4, namely the stretching depth of the stirrer, the stretching action of the stirrer is finished until the stretching depth reaches the preset stirring depth, and the height of the measuring float 3 at the moment is recorded as H;
(3) The stirrer is started to rotate, the paddle 2 starts to gradually accelerate stirring, at the moment, a concave liquid level taking the stirring shaft 1 as a center is formed due to free fluid flow of the stirring medium, the liquid level at the position of the measuring float 3 is gradually lowered, and the position H1 at the position of the measuring float 3 is monitored in real time.
(4) In the stirring process, the shape of the concave liquid level is accurately measured by a laser range finder with an automatic scanning mechanism, and the liquid level height of the current concave liquid level at the edge of the stirring container can be calculated by a trigonometric function relation.
Comparing the liquid level with the maximum allowable liquid level of the stirring container (the value is preset according to the actual stirring container), if the liquid level is smaller than the maximum allowable liquid level of the stirring container, the rotating speed of the paddle can be further increased to obtain better stirring efficiency, if the liquid level is larger than the maximum allowable liquid level, the splashing is about to overflow, the accelerating or the rotating speed of the paddle should be stopped or properly reduced, and if the liquid level is equal to the maximum allowable liquid level, the rotating speed of the paddle is kept.
When H1 is not changed any more or the up-down fluctuation range of H1 is smaller than a preset allowable fluctuation value (for example, the allowable fluctuation range is set to be 1% -5% of the initial stirring depth), the blade 2 is proved to reach the optimal stable rotating speed and enter a stable stirring state, and the adjustment of the rotating speed of the blade is stopped;
preferably, according to the shape of the concave liquid surface accurately measured by the laser range finder, the geometric empirical data of the concave liquid surface of the stirring medium under the parameters of a set stirring container, stirring blades, different stirring speeds (simplified conversion into a fluid speed field) and the like can be obtained, and whether the stirring effect has consistency or is used as a basis for rapidly judging the stirring completion progress during repeated stirring can be rapidly judged through a large amount of empirical data analysis.
(5) Under the stable stirring state, calculating delta H=H-H1, and if delta H is larger than a preset depth allowable fluctuation value (for example, 1% -5% of the initial stirring depth), correspondingly increasing the extending depth of the stirrer; returning to the step (4) to adjust the rotating speed of the blade again until the delta H is smaller than or equal to a preset depth allowable fluctuation value, and marking the H1 at the moment as a steady-state depth D; therefore, through the repeated closed-loop regulation and control process of the steps (4) and (5), the intelligent closed-loop regulation and control of the rotating speed and the stirring depth of the blade are realized, so that the stirring effect of high efficiency and no splashing and overflowing is achieved.
(6) In the stirring process, continuously monitoring the position H1 of the measuring float 3 in real time, if H1 is smaller than D and continuously descends, indicating that the liquid level is descending for some reason (the volume or viscosity of the stirring medium changes), continuously calculating the descending rate of H1 to obtain the changing speed of the stirring medium, combining the experience of the physical parameters of the stirring medium, judging whether the current stirring effect is normal or not and how the stirring degree is, and repeatedly executing the stirring parameters such as the stirring depth, the paddle rotating speed and the like corresponding to the steps (4) - (5) at the moment or stopping stirring;
(7) In the stirring process, stirring is stopped at regular intervals delta T, after the fluid is static, the position H1 of the measuring float 3 is obtained, the volume change caused by evaporation and the like in the stirring process is accurately calculated by comparing H1 with H, and then the automatic stirring parameter adjustment is realized by repeatedly executing the methods of the steps (4) - (5).
Preferably, if the materials are dynamically added during the stirring process, the automatic stirring parameter adjustment can be realized by adopting the methods of the steps (4) - (5) through monitoring the position H1 of the measuring float 3 in real time while adding without stopping stirring.
It will be obvious to those skilled in the art that the present invention may be varied in a number of ways without departing from the scope of the invention. All such modifications as would be obvious to one skilled in the art are intended to be included within the scope of this claims.
Claims (5)
1. The device for intelligently regulating and controlling the stirring effect in a closed loop manner comprises a stirrer, a driving motor and a controller, wherein the stirrer comprises a stirring shaft (1) and paddles (2), and is characterized in that the stirring shaft (1) is a hollow shaft, the paddles (2) are sleeved outside the stirring shaft (1) and are driven by the stirring shaft (1) to do rotary motion, the stirring shaft (1) is driven by the driving motor, and the starting and stopping of the driving motor and the rotating speed of the driving motor are controlled by the controller; a measuring float (3) and a distance meter (4) are arranged in the inner cavity of the stirring shaft (1), the measuring float (3) can float on the surface of fluid and can move up and down freely in the cavity, and a limiting block is arranged at the bottom of the cavity and used for preventing the measuring float (3) from falling out of the stirring shaft (1); the distance measuring device (4) is used for obtaining the position of the measuring floater (3); a laser range finder (5) with an automatic scanning mechanism is arranged on the outer wall of the upper part of the stirring shaft (1), and the included angle between the outgoing measuring laser beam of the laser range finder (5) and the stirring shaft (1) can be required to be adjusted; the distance measuring device (4) and the laser distance measuring device (5) are connected with the controller in a wired or wireless mode.
2. The device for intelligently and closed-loop regulating and controlling the stirring effect according to claim 1, wherein the distance meter (4) is arranged at the top of the cavity of the stirring shaft (1), and the distance meter (4) is a non-contact photoelectric distance meter or an ultrasonic distance measuring radar.
3. The device for intelligently regulating and controlling the stirring effect in a closed loop according to claim 1, wherein the distance measuring device (4) is arranged on the side wall of the cavity of the stirring shaft (1), the distance measuring device (4) is a pull rod type distance measuring device or a pull rope type distance measuring device, and one end of a distance measuring pull rod or a pull rope of the pull rod type distance measuring device or the pull rope type distance measuring device is connected with the end face of the measuring floater (3).
4. The method for intelligently regulating and controlling the stirring effect based on the device for intelligently regulating and controlling the stirring effect in a closed loop manner according to claim 1 is characterized by comprising the following steps:
(1) Pouring a stirring medium consisting of liquid or liquid-solid or liquid-gas mixture into a stirring container, waiting for the leveling stabilization of the liquid level, and placing a stirrer above the liquid level of the stirring medium before stirring begins;
(2) The stirrer is stretched into a stirring medium, a measuring float (3) of a stirring shaft (1) relatively rises from the bottom of the stirring shaft (1) along with the increase of the stretching depth of the stirrer, the height position of the measuring float (3) relative to the bottom of the stirring shaft (1) is obtained in real time through a distance meter (4), namely the height of the measuring float (3), namely the stretching depth of the stirrer, the stretching action of the stirrer is completed until the stretching depth reaches a preset stirring depth, and the height of the measuring float (3) is recorded as H;
(3) Starting the stirrer to rotate, and gradually accelerating stirring by the blade (2), wherein the free fluid flow of the stirring medium forms a concave liquid level taking the stirring shaft (1) as the center, the liquid level of the position of the measuring float (3) is gradually lowered, and the position H1 of the measuring float (3) is monitored in real time;
(4) In the stirring process, precisely measuring in real time by a laser range finder (5) to obtain the shape of the concave liquid surface, and calculating to obtain the liquid level height of the current concave liquid surface at the edge of the stirring container; comparing the current liquid level with the maximum allowable liquid level of the stirring container, and if the current liquid level is smaller than the maximum allowable liquid level, continuously increasing the rotating speed of the paddle; if the speed is greater than the preset speed, stopping accelerating or reducing the rotating speed of the blade, and if the speed is equal to the preset speed, keeping the current rotating speed of the blade;
when H1 is not changed any more or the up-down fluctuation range of H1 is smaller than the preset allowable fluctuation value, the blade (2) is proved to reach the optimal stable rotating speed and enter a stable stirring state, and the adjustment of the rotating speed of the blade is stopped;
(5) Under the stable stirring state, calculating delta H=H-H1, and if delta H is larger than a preset depth allowable fluctuation value, correspondingly increasing the extending depth of the stirrer; returning to the step (4) to adjust the rotating speed of the blade again until the delta H is smaller than or equal to a preset depth allowable fluctuation value, and marking the H1 at the moment as a steady-state depth D;
(6) Continuously monitoring the position H1 of the measuring float (3) in real time in the stirring process, if H1 is smaller than D and H1 continuously descends, indicating that the liquid level is descending, and repeatedly executing the steps (4) - (5) at the moment to realize automatic adjustment of stirring parameters;
(7) In the stirring process, stirring is stopped at regular intervals of delta T, after the fluid is static, the position H1 of the measuring float (3) is obtained, the volume change of the fluid in the stirring process is calculated by comparing H1 with H, and then the steps (4) - (5) are repeatedly executed to realize automatic adjustment of stirring parameters.
5. The method for intelligently and closed-loop regulating and controlling the stirring effect according to claim 4, wherein in the stirring process, if materials are required to be dynamically added, the stirring can be stopped, the position of the measuring float (3) is monitored in real time while the materials are added, and the steps (4) - (5) are adopted to realize the automatic adjustment of stirring parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310694961.6A CN116550191A (en) | 2023-06-13 | 2023-06-13 | Device and method for intelligently regulating stirring effect in closed loop mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310694961.6A CN116550191A (en) | 2023-06-13 | 2023-06-13 | Device and method for intelligently regulating stirring effect in closed loop mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116550191A true CN116550191A (en) | 2023-08-08 |
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ID=87503644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310694961.6A Pending CN116550191A (en) | 2023-06-13 | 2023-06-13 | Device and method for intelligently regulating stirring effect in closed loop mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116550191A (en) |
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2023
- 2023-06-13 CN CN202310694961.6A patent/CN116550191A/en active Pending
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