CN116371276A - Passive fluid mixing system and method - Google Patents

Passive fluid mixing system and method Download PDF

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Publication number
CN116371276A
CN116371276A CN202310669053.1A CN202310669053A CN116371276A CN 116371276 A CN116371276 A CN 116371276A CN 202310669053 A CN202310669053 A CN 202310669053A CN 116371276 A CN116371276 A CN 116371276A
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Prior art keywords
microcontroller
fluid
flow measurement
sensor
flow
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CN202310669053.1A
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Inventor
陈庆伦
周兆祺
王孝洪
王孝伟
高孝君
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Foshan Hongwei Technology Co ltd
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Foshan Hongwei Technology Co ltd
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Priority to CN202310669053.1A priority Critical patent/CN116371276A/en
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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
    • 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
    • B01F35/2111—Flow rate
    • 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
    • B01F35/2201—Control or regulation characterised by the type of control technique used
    • B01F35/2202—Controlling the mixing process by feed-back, i.e. a measured parameter of the mixture is measured, compared with the set-value and the feed values are corrected
    • 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
    • B01F35/2211—Amount of delivered fluid during a period
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention discloses a passive fluid mixing system and a passive fluid mixing method, which relate to the technical field of fluid mixing equipment and comprise a microcontroller, a driving circuit, an energy storage battery and a flow measurement control mechanism, wherein the flow measurement control mechanism comprises a plurality of flow measurement controllers, a mixing cavity and an output sensor, the input end of the mixing cavity is connected with a plurality of input pipelines, the flow measurement controllers are respectively arranged in the plurality of input pipelines, the output sensor is arranged at the output end of the mixing cavity, and the microcontroller is respectively connected with the driving circuit, the energy storage battery and the flow measurement control mechanism through signals. According to the invention, the flow measurement controller is arranged in the input pipeline to convert fluid kinetic energy into electric energy to be stored in the energy storage battery, an external power supply is not needed, the fluid is used for generating electricity, the flow measurement controller is controlled to work by the microcontroller, the fluid flow is controlled, the concentration mixing requirement is met, and the control system has high response speed and high precision.

Description

Passive fluid mixing system and method
Technical Field
The present disclosure relates to the field of fluid mixing devices, and more particularly, to a passive fluid mixing system and method.
Background
Different ratio mixing techniques for fluids are widely used in industrial and domestic applications, and the manner in which the ratio of fluid mixing is controlled in a system is generally by controlling the flow rate of each different fluid. If automatic control of the flow is to be achieved, a feedback device and an actuator for the flow are to be provided in the system. The current mainstream flow detection instrument is an active system, and cannot influence the flow velocity of the fluid, and the current more common flow automatic control is mainly realized by means of an electric valve, an electric push rod mechanical structure and the like, and external power supply is also needed. However, in practical applications, it is inconvenient to externally power the detection and control system due to severe environments, no power system or other factors in the area. Therefore, the passive fluid mixing control system has wider application fields in the field.
Disclosure of Invention
The present disclosure provides a passive fluid mixing system and method to address one of the above-mentioned issues.
The present disclosure provides a passive fluid mixing system comprising a microcontroller that receives an input signal and transmits a work order; the flow measurement control mechanism comprises a plurality of flow measurement controllers, a mixing cavity and an output sensor, wherein the input end of the mixing cavity is connected with a plurality of input pipelines, the flow measurement controllers are respectively arranged in the input pipelines, the output sensor is arranged at the output end of the mixing cavity, and the flow measurement controllers and the output sensor are respectively connected with the microcontroller through signals; the driving circuit is respectively connected with the microcontroller and the flow measurement controller in a signal way, receives the instruction of the microcontroller and drives the flow measurement controller to work; and the energy storage battery is respectively and electrically connected with the driving circuit and the microcontroller.
Preferably, the flow measurement controller comprises a driving motor, a transmission shaft, an impeller and a processor module, wherein the impeller is arranged in the input pipeline, the driving motor is in transmission connection with the impeller through the transmission shaft, the processor module is in signal connection with the driving motor, and the processor module is in signal connection with the driving circuit.
Preferably, a rotation speed sensor is arranged on the driving motor, and the rotation speed sensor is in signal connection with the microcontroller.
Preferably, the rotation speed of the driving motor is n, the volume of fluid in the input pipeline is a constant value k when the impeller rotates for one circle, and the relationship between the volume flow of the fluid and the rotation speed n of the driving motor is that:
Figure SMS_1
。
preferably, the target concentration of the fluid i is set to p i I is a natural number greater than or equal to 1, and the actual flow rate of the current fluid i is q i Actual concentration value p of fluid i i1 The method comprises the following steps:
Figure SMS_2
。
preferably, the driving circuit comprises a driving module and a voltage-stabilizing power supply module, wherein the driving module is respectively and electrically connected with the driving motor, the microcontroller and the energy storage battery, and the voltage-stabilizing power supply module is respectively and electrically connected with the driving motor, the microcontroller and the energy storage battery.
Preferably, a plurality of the input pipes and the output ends of the mixing chamber are respectively provided with a valve, and the valves are electrically connected with the microcontroller.
Preferably, the output sensor is one or more of a temperature sensor, a density sensor, a concentration sensor, a composition sensor and a flow sensor.
A method of using a passive fluid mixing system, comprising the steps of:
a. setting the target concentration of the fluid i as p i Opening a valve at the output end of the mixing cavity;
b. the microcontroller wakes up the energy storage battery and the voltage-stabilizing power supply module to provide power for the system;
c. the microcontroller instructs a valve in the input pipeline to open, fluid is introduced into the mixing cavity, the fluid pushes the impeller to rotate, the driving motor is driven to rotate, counter electromotive force is generated, and the energy storage battery is charged through the voltage-stabilizing power supply module;
d. the microcontroller obtains the rotating speed information of the driving motors through the rotating speed sensor, and calculates and obtains the flow information of the actual fluid in the output pipelines;
e. the microcontroller continuously corrects the actual flow values of various fluids by integrating and calculating the data of the input and output systems and introducing closed-loop control, and controls the rotating speed of the driving motor through the driving module to change the flow rates of different fluids, so that the concentration parameters of the mixed fluids finally reach the set values of users.
The beneficial effects of the present disclosure mainly lie in: according to the invention, the flow measurement controller is arranged in the input pipeline to convert fluid kinetic energy into electric energy to be stored in the energy storage battery, an external power supply is not needed, the fluid is used for generating electricity, the flow measurement controller is controlled to work by the microcontroller, the fluid flow is controlled, the concentration mixing requirement is met, and the control system has high response speed and high precision.
It is to be understood that both the foregoing general description and the following detailed description are for purposes of example and explanation and are not necessarily limiting of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the present disclosure. Meanwhile, the description and drawings are used to explain the principles of the present disclosure.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a block diagram of a system architecture of an embodiment of the present disclosure;
Detailed Description
The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present disclosure.
Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
In the description of the present disclosure, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.
Examples
As shown in fig. 1, the present embodiment provides a passive fluid mixing system, including:
the microcontroller receives an input signal and sends a working instruction;
the flow measurement control mechanism comprises a plurality of flow measurement controllers, a mixing cavity and an output sensor, wherein the input end of the mixing cavity is connected with a plurality of input pipelines, the flow measurement controllers are respectively arranged in the input pipelines, the output sensor is arranged at the output end of the mixing cavity, and the flow measurement controllers and the output sensor are respectively connected with the microcontroller through signals;
the driving circuit is respectively connected with the microcontroller and the flow measurement controller in a signal way, receives the instruction of the microcontroller and drives the flow measurement controller to work;
and the energy storage battery is respectively and electrically connected with the driving circuit and the microcontroller.
The flow measurement controller comprises a driving motor, a transmission shaft, an impeller and a processor module, wherein the impeller is arranged in the input pipeline and is tightly matched with an inner cavity of the input pipeline, the driving motor is in transmission connection with the impeller through the transmission shaft, the processor module is in signal connection with the driving motor, and the processor module is in signal connection with the driving circuit.
The driving motor is provided with a rotating speed sensor, the rotating speed sensor is in signal connection with the microcontroller, and the rotating speed of the driving motor is detected through the rotating speed sensor, so that fluid flow data are calculated.
The microcontroller is a core and a control unit of the system, controls the driving circuit at the same time, receives input signals of the interactive interface, and a user can set parameters such as target flow or mixed target concentration of each pipeline through the interactive module. The rotation speed of the driving motor is measured by the rotation speed sensor to obtain the rotation speed, and then the rotation speed is fed back to the microcontroller through each communication protocol or analog voltage and is compared with a set value in a microcontroller program. When the set value and the feedback value have errors, the microcontroller controls the processor module by increasing or decreasing the duty ratio of the output PWM signal, and further controls the driving or braking current of the driving motor, so that the rotating speed of the driving motor is controlled within a certain range, and finally, the errors tend to zero.
Specifically, fluid passes through the input pipeline, flows through the impeller to drive the impeller to rotate, the volume of the fluid rotating for one circle is a constant value k, the microcontroller obtains the rotating speed n of the driving motor through the rotating speed sensor, and the relation between the volume flow Q of the fluid and the rotating speed of the motor is as follows:
Figure SMS_3
。
setting the target concentration of the fluid i as p i I is a natural number greater than or equal to 1 (i=1, 2,3 … … n), the actual flow of the current fluid i is q i Actual concentration value p of fluid i i1 The method comprises the following steps:
Figure SMS_4
。
assuming that the flow rate of the remaining fluid remains unchanged, the target fluid q can be found i And subtracting the actual value from the target value to obtain the flow error of the fluid i. The data are calculated in the microcontroller, the control signal of the microcontroller to the processor module is changed along with the change of the error through closed-loop control, and finally the flow error can be enabled to be zero, and the concentration of the mixed fluid i reaches the set value of a user.
Specifically, the driving circuit comprises a driving module and a voltage-stabilizing power supply module, wherein the driving module is respectively and electrically connected with the driving motor, the microcontroller and the energy storage battery, and the voltage-stabilizing power supply module is respectively and electrically connected with the driving motor, the microcontroller and the energy storage battery. The energy storage battery provides stable working voltage for the microcontroller and the driving module through the voltage-stabilizing power supply module, the flow measurement controller charges the energy storage battery through the voltage-stabilizing power supply module, and the voltage-stabilizing power supply module is a voltage-stabilizing power supply module formed by different DC-DC conversion circuits in the prior art.
Further, a plurality of input pipelines and output ends of the mixing cavity are respectively provided with a valve, and the valves are electrically connected with the microcontroller. The microcontroller controls the on-off of each valve and controls the whole system to work.
Further, the output sensor is one or more of a combination of a temperature sensor, a density sensor, a concentration sensor, a composition sensor and a flow sensor. The output sensor is arranged at a position close to the outlet of the mixing cavity, and can be set as a temperature sensor, a density sensor, a concentration sensor or a component sensor according to different controlled objects, and the like, and can be freely set according to actual practice.
A method of using a passive fluid mixing system, comprising the steps of:
a. setting the target concentration of the fluid i as p i Opening a valve at the output end of the mixing cavity;
b. the microcontroller wakes up the energy storage battery and the voltage-stabilizing power supply module to provide power for the system;
c. the microcontroller instructs a valve in the input pipeline to open, fluid is introduced into the mixing cavity, the fluid pushes the impeller to rotate, the driving motor is driven to rotate, counter electromotive force is generated, and the energy storage battery is charged through the voltage-stabilizing power supply module;
d. the microcontroller obtains the rotating speed information of the driving motors through the rotating speed sensor, and calculates and obtains the flow information of the actual fluid in the output pipelines;
e. the microcontroller continuously corrects the actual flow values of various fluids by integrating and calculating the data of the input and output systems and introducing closed-loop control, and controls the rotating speed of the driving motor through the driving module to change the flow rates of different fluids, so that the concentration parameters of the mixed fluids finally reach the set values of users.
The working principle of the invention is as follows: when the system receives a starting signal and the valve at the output end of the mixing cavity is opened, the microcontroller wakes up the energy storage battery and the voltage-stabilizing power supply module to supply power for the system. After the program is started, the microcontroller controls valves in the input pipelines to be opened, fluid drives the impeller to rotate through the input pipelines, so that the driving motor is driven to rotate to generate back electromotive force, braking control is applied through the driving module, and the energy storage battery can be charged through the voltage-stabilizing power supply module. The microcontroller obtains the rotation speed information of the driving motor through the rotation speed sensor, calculates the flow information of the actual fluid in the pipelines through the built-in calculation unit, and obtains the data of the flow velocity, the temperature, the concentration and the like of the mixed fluid through the output sensor in the mixing cavity. The microcontroller performs fusion calculation on the data of the input and output systems, introduces closed-loop control to continuously correct the actual flow values of various fluids, and controls the rotating speed of the motor through the driving module so as to quickly and flexibly change the flow rate of the fluids, and finally enables various parameters of the mixed fluids to reach user set values.
For example, using a mixture of n fluids as an example, the user sets the concentration of the target fluid i to p i Where i is a natural number greater than or equal to 1 (i=1, 2,3 … … n), the current flow i is q i The actual value of the flow can be indirectly obtained by the rotation speed of the driving motor, and the actual concentration value p of the fluid i i1 The method comprises the following steps:
Figure SMS_5
。
assuming that the flow rate of the remaining fluid remains unchanged, the target fluid q can be found i Is set to a target value of (1). The flow error of the fluid i is obtained by subtracting the actual value from the target value, the data are calculated by the microcontroller, the control signal of the driving module is changed along with the change of the error by the microcontroller through closed-loop control, and finally the flow error is enabled to be zero, and the concentration of the mixed fluid i reaches the set value of a user.
In a general working state, the flow measurement controller works in a braking mode, namely the initial fluid flow rate is larger than the controlled fluid flow rate, so that a small amount of mechanical energy can be converted into electric energy through the driving motor to charge the energy storage battery, and the electric energy supply of the system is ensured. When the battery is full, this mechanical energy is then converted into thermal energy for dissipation.
When the control range of the flow measurement controller is determined by the initial flow rate of the fluid and the mechanical structure, the flow rate of a certain fluid cannot be reduced to zero. Therefore, when the electric quantity of the energy storage battery is higher, the flow control mechanism can work in a driving mode to improve the flow. For example, when the target mixing concentration of a certain fluid is high, the driving motor of the input pipeline flow measurement controller can work in an electric state through battery power supply, so that the fluid flow is accelerated, and the flow is further improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure.

Claims (9)

1. A passive fluid mixing system, comprising:
the microcontroller receives an input signal and sends a working instruction;
the flow measurement control mechanism comprises a plurality of flow measurement controllers, a mixing cavity and an output sensor, wherein the input end of the mixing cavity is connected with a plurality of input pipelines, the flow measurement controllers are respectively arranged in the input pipelines, the output sensor is arranged at the output end of the mixing cavity, and the flow measurement controllers and the output sensor are respectively connected with the microcontroller through signals;
the driving circuit is respectively connected with the microcontroller and the flow measurement controller in a signal way, receives the instruction of the microcontroller and drives the flow measurement controller to work;
and the energy storage battery is respectively and electrically connected with the driving circuit and the microcontroller.
2. The passive fluid mixing system of claim 1 wherein the flow measurement controller comprises a drive motor, a drive shaft, an impeller and a processor module, the impeller disposed in the input conduit, the drive motor in driving communication with the impeller via the drive shaft, the processor module in signal communication with the drive motor, the processor module in signal communication with the drive circuit.
3. A passive fluid mixing system as claimed in claim 2 wherein a rotational speed sensor is provided on the drive motor, the rotational speed sensor being in signal connection with the microcontroller.
4. A passive fluid mixing system as claimed in claim 3 wherein the rotational speed of the drive motor is n, the volume of fluid in the input conduit is a constant k for one revolution of the impeller, and the volumetric flow rate of fluid is Q in relation to the rotational speed of the drive motor n is:
Figure QLYQS_1
。
5. a passive fluid mixing system as defined in claim 4 wherein the target concentration of fluid i is set to p i I is a natural number greater than or equal to 1, and the actual flow rate of the current fluid i is q i Actual concentration value p of fluid i i1 The method comprises the following steps:
Figure QLYQS_2
。
6. the passive fluid mixing system of claim 1 wherein the drive circuit comprises a drive module and a regulated power supply module, the drive module being electrically connected to the drive motor, the microcontroller and the energy storage battery, respectively, the regulated power supply module being electrically connected to the drive motor, the microcontroller and the energy storage battery, respectively.
7. A passive fluid mixing system as claimed in claim 1 wherein a plurality of said input conduits and mixing chamber outputs are each provided with a valve, said valves being electrically connected to said microcontroller.
8. The passive fluid mixing system of claim 1, wherein the output sensor is one or more of a temperature sensor, a density sensor, a concentration sensor, a composition sensor, and a flow sensor.
9. A method for use in a passive fluid mixing system according to any of claims 1-8, comprising the steps of:
a. setting the target concentration of the fluid i as p i Opening a valve at the output end of the mixing cavity;
b. the microcontroller wakes up the energy storage battery and the voltage-stabilizing power supply module to provide power for the system;
c. the microcontroller instructs a valve in the input pipeline to open, fluid is introduced into the mixing cavity, the fluid pushes the impeller to rotate, the driving motor is driven to rotate, counter electromotive force is generated, and the energy storage battery is charged through the voltage-stabilizing power supply module;
d. the microcontroller obtains the rotating speed information of the driving motors through the rotating speed sensor, and calculates and obtains the flow information of the actual fluid in the output pipelines;
e. the microcontroller continuously corrects the actual flow values of various fluids by integrating and calculating the data of the input and output systems and introducing closed-loop control, and controls the rotating speed of the driving motor through the driving module to change the flow rates of different fluids, so that the concentration parameters of the mixed fluids finally reach the set values of users.
CN202310669053.1A 2023-06-07 2023-06-07 Passive fluid mixing system and method Pending CN116371276A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201497522U (en) * 2009-08-28 2010-06-02 卢义兵 Pipeline fluid monitoring system for generating electricity by utilizing fluid per se
CN205317432U (en) * 2016-01-15 2016-06-15 苏州创必成电子科技有限公司 Short range self -power pipeline fluid flow watch -dog
CN107357320A (en) * 2017-07-14 2017-11-17 杨永峰 Self-excitation flow control system
US20220040653A1 (en) * 2019-11-27 2022-02-10 Diversified Fluid Solutions, Llc On-demand in-line-blending and supply of chemicals
CN114858228A (en) * 2022-04-22 2022-08-05 浙江英集动力科技有限公司 Flow regulation and measurement integrated device and flow measurement method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201497522U (en) * 2009-08-28 2010-06-02 卢义兵 Pipeline fluid monitoring system for generating electricity by utilizing fluid per se
CN205317432U (en) * 2016-01-15 2016-06-15 苏州创必成电子科技有限公司 Short range self -power pipeline fluid flow watch -dog
CN107357320A (en) * 2017-07-14 2017-11-17 杨永峰 Self-excitation flow control system
US20220040653A1 (en) * 2019-11-27 2022-02-10 Diversified Fluid Solutions, Llc On-demand in-line-blending and supply of chemicals
CN114858228A (en) * 2022-04-22 2022-08-05 浙江英集动力科技有限公司 Flow regulation and measurement integrated device and flow measurement method

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Application publication date: 20230704