CN209865818U - Device for automatically adjusting rotating speed of stirrer according to concentration change of solid-liquid two-phase flow - Google Patents
Device for automatically adjusting rotating speed of stirrer according to concentration change of solid-liquid two-phase flow Download PDFInfo
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- CN209865818U CN209865818U CN201920137113.4U CN201920137113U CN209865818U CN 209865818 U CN209865818 U CN 209865818U CN 201920137113 U CN201920137113 U CN 201920137113U CN 209865818 U CN209865818 U CN 209865818U
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Abstract
The utility model discloses a device for automatically adjusting the rotating speed of a stirring machine according to the concentration change of solid-liquid two-phase flow, which comprises a stirring tank, a concentration detection device, a variable-speed stirring mechanism and a controller, wherein the concentration detection device monitors the concentration of the solid-liquid two-phase flow through ultrasonic waves, the concentration detection device transmits the monitored concentration change of the solid-liquid two-phase flow to the controller in the form of electric signals, and the controller outputs control signals to the variable-speed stirring mechanism after reading the electric signals; the concentration detection device comprises a transmitting probe and a receiving probe, wherein the transmitting probe and the receiving probe are respectively arranged on the outer walls of the two sides of the stirring tank, and the transmitting probe and the receiving probe are respectively connected with the input end and the output end of the concentration detector. The utility model discloses can the automatic monitoring solid-liquid two-phase flow concentration change to but according to its concentration change automatic adjustment stirring rotational speed, solved the problem that exists among the prior art.
Description
Technical Field
The utility model belongs to the technical field of the agitating unit technique of automatically regulated stirring rotational speed and specifically relates to a device of automatically regulated mixer rotational speed changes according to solid-liquid two-phase flow concentration.
Background
The solid-liquid two-phase flow is widely existed in the fields of nature, energy, chemical industry, petroleum, mining industry, water conservancy and the like. In recent years, with the appearance of new materials, new technologies and new processes, the application range of the solid-liquid two-phase flow theory is continuously expanded. Therefore, the research on the solid-liquid two-phase flow is more and more important at home and abroad.
The solid-liquid two-phase flow is a mixed fluid composed of solid-phase particles and liquid-phase fluid, in which the solid-phase particles and the liquid-phase fluid are closely related and mutually influenced and restricted in movement. The solid-liquid phase flow not only has solid-liquid phase interaction, but also has solid-solid phase interaction and liquid-liquid phase interaction, and the existence of the solid phase can change the characteristics of the original flow field. Therefore, it is difficult to study the interaction between two phases in a two-phase flow and the motion characteristics of each phase.
At present, when a solid-liquid two-phase flow is researched in a laboratory, a sedimentation phenomenon easily occurs in the solid-liquid two-phase flow due to solid particles, and the phenomenon brings certain difficulty to the transportation research of the solid-liquid two-phase flow, the distribution research of a concentration field and the like. For example, in a solid-liquid two-phase conveying experiment, in order to ensure that a continuously conveyed medium maintains a certain concentration, stirring is often performed by using a stirring tank, solid particles in a solid-liquid two-phase flow are settled due to gravity in the stirring process, and the settling speed of the solid particles is related to parameters such as the size and the density of the solid particles. Due to the sedimentation of solid particles, the actual concentration and the theoretical concentration of the solid-liquid two-phase medium have great deviation, and the accuracy of an experimental result is influenced. The traditional method mostly used in China is to manually measure the solid particle concentration of a solid-liquid two-phase fluid, and the method is mainly to take a certain volume of mixed solution, filter out solid particles and then dry and weigh the solid particles. This method has the following 2 disadvantages: 1) impurities such as silt or scrap iron can be mixed into the solid particles, which can cause inaccuracy of the measurement result; 2) the method has the advantages of complex operation process, time and labor waste and untimely feedback concentration change.
For example, in a solid-liquid two-phase flow experiment, solid-liquid mixing is also performed in a stirring tank. The specific operation is as follows: according to the concentration required by experimental design, water with required volume and solid particles with required mass are added into the stirring tank, and the stirring paddle is driven by the motor to stir, so that the concentration reduction of the solid-liquid two-phase flow caused by the sedimentation effect of the solid particles is avoided. Because the rotating speed of the stirrer is fixed in the experimental process, when solid-liquid two-phase flow with different concentrations is needed, the rotating speed of the stirrer probably cannot meet the requirement of the high-concentration solid-liquid two-phase flow.
Therefore, in the research process of the solid-phase two-phase flow, it is necessary to design a device capable of automatically detecting the concentration of the solid-phase solution and the liquid-phase solution and controlling the rotating speed of the stirrer.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a device according to solid-liquid two-phase flow concentration change automatically regulated mixer rotational speed, the device can the change of automatic monitoring solid-liquid two-phase flow concentration to but according to its concentration change automatically regulated stirring rotational speed, solved the problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a device of automatic speed regulation mixer according to solid-liquid two-phase flow concentration change, includes the agitator tank, its characterized in that: the concentration detection device monitors the concentration of the solid-liquid two-phase flow through ultrasonic waves, the concentration detection device transmits the monitored concentration change of the solid-liquid two-phase flow to the controller in an electric signal mode, and the controller outputs a control signal to the variable-speed stirring mechanism after reading the electric signal.
In the structure, the stirring tank provides a cavity for mixing the raw materials of the solid-liquid two-phase flow, the concentration change of the solid-liquid two-phase flow is detected in real time by the concentration detection device in the stirring process, the concentration change signal is transmitted to the controller in the form of an electric signal, the controller reads the electric signal and outputs a control signal to the variable-speed stirring mechanism to change the rotating speed of the variable-speed stirring mechanism, the purpose of automatically adjusting the rotating speed according to the concentration change of the solid-liquid two-phase flow is achieved, and the concentration detection device can adopt ultrasonic monitoring or ray detection (infrared rays, X rays, beta rays and the like).
Furthermore, the concentration detection device comprises a transmitting probe and a receiving probe, the transmitting probe and the receiving probe are respectively arranged on the outer walls of the two sides of the stirring tank, and the transmitting probe and the receiving probe are respectively connected with the input end and the output end of the concentration detector.
In the structure, the transmitting probe and the receiving probe are respectively arranged at two sides of the stirring tank, the connecting line of the transmitting probe and the receiving probe penetrates through the central line of the stirring tank, a concentration change signal (ultrasonic signal or ray signal) is transmitted from the transmitting probe and received by the receiving probe, and then the concentration change signal is converted into an electric signal to be received by the controller.
Further, variable speed rabbling mechanism includes converter, variable frequency speed motor and stirring rake, and the stirring rake includes the (mixing) shaft and sets up the stirring vane in (mixing) shaft one end, and the (mixing) shaft other end is installed on the agitator tank apron, and the (mixing) shaft this end with variable frequency speed motor synchronous motion connects, and variable frequency speed motor's output and (mixing) shaft stretch out the one end of agitator tank apron and be connected, and variable frequency speed motor's input and converter output are connected, and the converter input is connected with the controller.
In the structure, the solid-liquid two-phase flow is stirred by the stirring paddle in the stirring tank, the stirring paddle is driven by the variable-frequency speed-regulating motor, the frequency converter opens or closes the corresponding switch according to a control signal sent by the controller, and the frequency and the input voltage of the variable-frequency speed-regulating motor are regulated to achieve the purpose of changing the stirring rotating speed of the stirring paddle.
Further, be equipped with the arc breach on the stirring cover apron, the motor cabinet is equipped with admittedly outside the stirring cover apron, and the motor cabinet includes bottom plate and the mounting panel of setting at the bottom plate up end, and the mounting panel forms the longitudinal section with the bottom plate and is "protruding" style of calligraphy structure, and the fastener through interval distribution around the mounting panel is fixed to be assembled on the stirring tank apron.
In the structure, the stirring tank cover plate provides a mounting plate for the variable-frequency speed-regulating motor, the mounting plate is fixed on the stirring tank cover plate through the bottom plate, and in addition, the arc-shaped notch on the stirring tank cover plate can provide observation use or ventilation or feeding use.
Further, the controller includes a control circuit, the control circuit includes switches corresponding to the plurality of concentration values, which are respectively: appropriate value of concentration C1Corresponding switch LS1Concentration of lower value C2Corresponding switch LS2Minimum concentration value C3Corresponding switch LS3… …, each switch is connected with the input pin of the single chip, the output pin of the single chip is connected with the maximum voltage frequency pin, the increase voltage frequency pin and the hold voltage frequency pin of the frequency converter, the output end of the frequency converter has the frequency converter output pin corresponding to the maximum voltage frequency pin, the increase voltage frequency pin and the hold voltage frequency pin, and the output pin of the frequency converter is connected with the input end of the variable frequency speed regulating motor.
In the structure, the controller realizes the effect of automatically adjusting the stirring speed according to the concentration change of the solid-liquid two-phase flow through the control circuit, each input pin on the single chip corresponds to different concentration range values, when the concentration detection device monitors that the concentration of solid particles changes, namely when the concentration of the solid particles in the stirring tank is reduced to a threshold value, the switch corresponding to the corresponding concentration range value is conducted, the corresponding output pin of the single chip outputs a corresponding control signal to control the frequency converter to open the corresponding switch, and the frequency converter changes the voltage frequency of the input variable-frequency speed-regulating motor, so that the stirring speed of the stirring paddle is improved.
Adopt above-mentioned scheme, the utility model discloses change solid particle concentration change into the signal of telecommunication in the agitator tank to with signal of telecommunication transmission to the controller, make corresponding action control variable frequency speed regulation motor by the controller, change the agitator motor rotational speed in order to adjust solid-liquid two-phase flow concentration field distribution, it forms a closed loop system that can the double-phase concentration of automatic monitoring solid-liquid and automatic control mixer rotational speed, consequently, solid-liquid two-phase flow concentration and rotational speed all can keep in certain target range, make the concentration of the mixed solution who gets into in the pump keep in a definite value scope.
The present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a connection structure according to an embodiment of the present invention;
FIG. 2 is a structural connection diagram of a physical product according to an embodiment of the present invention;
FIG. 3 is a front view of the structure of FIG. 2 according to the embodiment of the present invention;
FIG. 4 is a top view of the agitator tank according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a stirring paddle in a stirring tank according to an embodiment of the present invention;
FIG. 6 is a diagram of a control circuit according to an embodiment of the present invention;
the stirring tank comprises a stirring tank 1, a stirring tank cover plate 2, an arc notch 21, a motor base 22, a bottom plate 221, a mounting plate 222, a transmitting probe 31, a receiving probe 32, an ultrasonic wave concentration meter 33, a stirring paddle 4, a stirring blade 41, a stirring shaft 42, a controller 5 and a variable-speed stirring mechanism 6.
Detailed Description
The utility model discloses a concrete embodiment is shown in figures 1-6 is according to the device of solid-liquid two-phase flow concentration change automatically regulated mixer rotational speed, and it includes agitator tank 1, concentration detection device, variable speed rabbling mechanism 6 and controller 5, and concentration detection device passes through ultrasonic wave monitoring solid-liquid two-phase flow concentration, and the two-phase concentration change of solid-liquid that concentration detection device will monitor gives controller 5 with the form of the signal of telecommunication, and controller 5 reads behind the signal of telecommunication output control signal to variable speed rabbling mechanism 6. The stirring tank 1 provides a cavity for mixing the raw materials of the solid-liquid two-phase flow, the concentration change of the solid-liquid two-phase flow is detected in real time by a concentration detection device in the stirring process, the concentration change signal is transmitted to the controller 5 in the form of an electric signal, the controller 5 reads the electric signal and outputs a control signal to the variable-speed stirring mechanism 6 to change the rotating speed of the variable-speed stirring mechanism, the purpose of automatically adjusting the rotating speed according to the concentration change of the solid-liquid two-phase flow is achieved, the concentration detection device can adopt ultrasonic monitoring or ray detection (infrared rays, X rays, beta rays and the like), and the ultrasonic detection is specifically exemplified in the embodiment.
The concentration detection device comprises a transmitting probe 31 and a receiving probe 32, the transmitting probe 31 and the receiving probe 32 are respectively arranged on the outer walls of two sides of the stirring tank 1, and the transmitting probe 31 and the receiving probe 32 are respectively connected with the input end and the output end of an ultrasonic concentration meter (F3000 non-contact concentration meter) 33. The transmitting probe 31 and the receiving probe 32 are respectively arranged at two sides of the stirring tank 1, the connecting line of the transmitting probe 31 and the receiving probe 32 passes through the central line of the stirring tank 1, the concentration change signal, namely the ultrasonic signal, is transmitted from the transmitting probe 31 and received by the receiving probe 32, and then the concentration change signal is converted into an electric signal to be received by the controller 5.
The variable-speed stirring mechanism 6 comprises a frequency converter, a variable-frequency speed-regulating motor and a stirring paddle 4, wherein the frequency converter adopts an MM440 frequency converter, the variable-frequency speed-regulating motor adopts a 1TL002 variable-frequency speed-regulating three-phase asynchronous motor, the frequency converter and the variable-frequency speed-regulating motor are arranged above the stirring tank 1 after being arranged in a whole shell, the stirring paddle 4 comprises a stirring shaft 42 and a stirring blade 41 arranged at one end of the stirring shaft 42, the other end of the stirring shaft 42 is arranged on the stirring tank cover plate 2, an arc notch 21 is arranged on the stirring tank cover plate 2, a motor base 22 is fixedly arranged on the outer side of the stirring tank cover plate 2, the motor base 22 comprises a bottom plate 221 and a mounting plate 222 arranged on the upper end face of the bottom plate 221, the longitudinal section of the mounting plate 222 and the bottom plate 221 form a convex. The variable frequency speed control motor is assembled on the mounting plate 222, and the variable frequency speed control motor is connected with the stirring paddle 4 in a synchronous motion manner, specifically, the output end of the variable frequency speed control motor is connected with one end of the stirring shaft 42 extending out of the stirring tank cover plate 2, the input end of the variable frequency speed control motor is connected with the output end of the frequency converter, the input end of the frequency converter is connected with the controller 5, the controller 5 can be realized by adopting the existing S7-200PLC, and can also be realized by adopting the control circuit disclosed in the embodiment.
The controller 5 includes a control circuit, the control circuit includes switches corresponding to a plurality of concentration values, the specific number of the concentration values is illustrated as 3, the concentration values may be fixed values or certain range values, and the embodiment is preferably a certain range value. Specifically, the concentration reference value C0(control target concentration) can be set as required, and the following 3 concentration values are all the concentration values corresponding to the reference concentration value C0A low concentration value range of the directrix. Appropriate value of concentration C1Corresponding switch LS1Concentration of lower value C2Corresponding switch LS2Minimum concentration value C3Corresponding switch LS3… …, 3 switches are connected with 3 input pins on the single chip microcomputer MCS-51 in one-to-one correspondence, the corresponding 3 output pins of the single chip microcomputer are respectively connected with the maximum voltage frequency pin of the frequency converter (increasing the voltage frequency to the maximum to make the variable frequency speed motor have the maximum rotating speed), the voltage frequency increasing pin (increasing the voltage frequency to make the variable frequency speed motor have the larger rotating speed), the voltage frequency maintaining pin (maintaining the voltage frequency to make the variable frequency speed motor rotate normally), the frequency converter output end has the frequency converter output pins corresponding to the maximum voltage frequency pin, the voltage frequency increasing pin and the voltage frequency maintaining pin, and each frequency converter output pin is connected with the input end of the variable frequency speed motor. The controller 5 realizes the effect of automatically adjusting the stirring speed according to the concentration change of the solid-liquid two-phase flow through the control circuit, each input pin on the single chip corresponds to different concentration range values, when the concentration detection device monitors that the concentration of the solid particles changes, namely when the concentration of the solid particles in the stirring tank 1 is reduced to a threshold value, a switch corresponding to the corresponding concentration range value is conducted, a corresponding output pin of the single chip outputs a corresponding control signal to control the frequency converter to open a corresponding switch, and the frequency converter changes the voltage frequency of the input variable-frequency speed-regulating motor, so that the stirring speed of the stirring paddle 4 is improved.
The electric control principle of the control circuit is as follows: when the concentration detection device detects that the concentration of the solid-liquid two-phase fluid is in a proper concentration range, the concentration detection device will detect that the concentration of the solid-liquid two-phase fluid is in the proper concentration rangeThe electric signal is transmitted to the controller 5, the switch LS1The controller 5 transmits a signal to the frequency converter after receiving the signal with normal concentration, and the frequency converter controls the frequency at the frequency of normal rotating speed; when the concentration detection device detects that the concentration of the solid-liquid two-phase fluid is low, an electric signal is transmitted to the controller 5, and the switch LS is switched2The controller 5 transmits a signal to the frequency converter after receiving a signal with low concentration, the frequency converter increases the frequency by a certain value, and the rotating speed of the variable-frequency speed-regulating motor is increased, so that the rotating speed of the stirring paddle 4 is increased, and the concentration of the solid-liquid two-phase fluid is increased to a proper concentration range; when the concentration detection device detects that the concentration of the solid-liquid two-phase fluid is in a very low range, an electric signal is transmitted to the controller 5, and the switch LS is switched on or off3After the controller 5 receives the signal with low concentration, the signal is transmitted to the frequency converter, the frequency converter further increases the frequency, the rotating speed of the variable frequency speed regulating motor is further increased, and therefore the rotating speed of the stirring paddle 4 is further increased, and the concentration of the solid-liquid two-phase fluid is increased to a proper concentration range.
The utility model discloses do not confine the above-mentioned embodiment to, the general technical personnel in this field can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, all fall into the utility model discloses a protection scope.
Claims (5)
1. The utility model provides a device of automatic speed regulation mixer according to solid-liquid two-phase flow concentration change, includes the agitator tank, its characterized in that: the concentration detection device monitors the concentration of the solid-liquid two-phase flow through ultrasonic waves, the concentration detection device transmits the monitored concentration change of the solid-liquid two-phase flow to the controller in an electric signal mode, and the controller outputs a control signal to the variable-speed stirring mechanism after reading the electric signal.
2. The device for automatically adjusting the rotating speed of the stirring mill according to the concentration change of the solid-liquid two-phase flow according to claim 1, wherein: the concentration detection device comprises a transmitting probe and a receiving probe, wherein the transmitting probe and the receiving probe are respectively arranged on the outer walls of the two sides of the stirring tank, and the transmitting probe and the receiving probe are respectively connected with the input end and the output end of the concentration detector.
3. The apparatus according to claim 1 or 2, wherein the apparatus for automatically adjusting the rotation speed of the agitator according to the concentration change of the solid-liquid two-phase flow comprises: but variable speed rabbling mechanism includes converter, variable frequency speed motor and stirring rake, and the stirring rake includes the (mixing) shaft and sets up the stirring vane in (mixing) shaft one end, and the (mixing) shaft other end is installed on the agitator tank apron, and this end of (mixing) shaft with variable frequency speed motor synchronous motion connects, and variable frequency speed motor's output and (mixing) shaft stretch out the one end of agitator tank apron and be connected, and variable frequency speed motor's input and converter output are connected, and the converter input is connected with the controller.
4. The apparatus according to claim 3, wherein said apparatus is adapted to automatically adjust the rotation speed of said agitator according to the concentration variation of said solid-liquid two-phase flow, and comprises: the stirring tank cover plate is provided with an arc-shaped notch, the outer side of the stirring tank cover plate is fixedly provided with a motor base, the motor base comprises a bottom plate and a mounting plate arranged on the upper end face of the bottom plate, the mounting plate and the bottom plate form a structure with a longitudinal section in a shape like a Chinese character 'tu', and the periphery of the mounting plate is fixedly assembled on the stirring tank cover plate through fasteners distributed at intervals.
5. The apparatus according to claim 1 or 2, wherein the apparatus for automatically adjusting the rotation speed of the agitator according to the concentration change of the solid-liquid two-phase flow comprises: the controller comprises a control circuit, the control circuit comprises switches corresponding to a plurality of concentration values, and the control circuit comprises the following components: appropriate value of concentration C1Corresponding switch LS1Concentration of lower value C2Corresponding switch LS2Minimum concentration value C3Corresponding switch LS3… …, each switch is connected with the input pin of the single chip, the output pin of the single chip is connected with the maximum voltage frequency pin, the increase voltage frequency pin and the hold voltage frequency pin of the frequency converterAnd the output end of the frequency converter is provided with frequency converter output pins corresponding to the maximum voltage frequency pin, the increase voltage frequency pin and the hold voltage frequency pin respectively, and each frequency converter output pin is connected with the input end of the variable-frequency speed-regulating motor respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920137113.4U CN209865818U (en) | 2019-01-25 | 2019-01-25 | Device for automatically adjusting rotating speed of stirrer according to concentration change of solid-liquid two-phase flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920137113.4U CN209865818U (en) | 2019-01-25 | 2019-01-25 | Device for automatically adjusting rotating speed of stirrer according to concentration change of solid-liquid two-phase flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092210A (en) * | 2020-10-20 | 2020-12-18 | 邵阳县华锐合金工具有限公司 | Prevent cracked frequency conversion glass hole of glass and bore |
| CN113880349A (en) * | 2021-08-06 | 2022-01-04 | 林学优 | Rotating magnetic field micro-pulse micro-arc sewage treatment method and system |
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2019
- 2019-01-25 CN CN201920137113.4U patent/CN209865818U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092210A (en) * | 2020-10-20 | 2020-12-18 | 邵阳县华锐合金工具有限公司 | Prevent cracked frequency conversion glass hole of glass and bore |
| CN113880349A (en) * | 2021-08-06 | 2022-01-04 | 林学优 | Rotating magnetic field micro-pulse micro-arc sewage treatment method and system |
| CN113880349B (en) * | 2021-08-06 | 2023-11-14 | 林学优 | Rotary magnetic field micropulse micro-arc sewage treatment method and system |
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