CN101709010A - Control system for viscosity of compound fertilizer slurry - Google Patents
Control system for viscosity of compound fertilizer slurry Download PDFInfo
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- CN101709010A CN101709010A CN200910194183A CN200910194183A CN101709010A CN 101709010 A CN101709010 A CN 101709010A CN 200910194183 A CN200910194183 A CN 200910194183A CN 200910194183 A CN200910194183 A CN 200910194183A CN 101709010 A CN101709010 A CN 101709010A
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Abstract
The invention discloses a control system for the viscosity of compound fertilizer slurry, comprising a feeding mechanism, a mixing tank, a rotary spray head, a slurry conduit, a control system and a rotary spray head motor. The compound fertilizer slurry in the mixing tank enters the rotary spray head through the slurry conduit, and the rotary spray head motor drives the rotary spray head to granulate. The control system comprises a pressure sensor, a pressure sensor processing device, a signal amplifying device, a rotating speed controller and a feeding ratio controller, wherein the pressure sensor device detects the pressure value of the compound fertilizer slurry, outputs the detected pressure value to the pressure sensor processing device in a mode of detecting current and forms a detecting current signal, and then a control signal is formed through the signal amplifying device and output to the rotating speed controller and the feeding ratio controller so as to control the rotating speed of the rotary spray head motor and the feeding ratio of the compound fertilizer slurry. The control system can control the viscosity of the compound fertilizer slurry so as to ensure that the compound fertilizer has uniform grain size, high utilization rate and uniform nutrient, and is easy to absorb.
Description
Technical field
The present invention relates to composite fertilizer's production system, relate more specifically to a kind of Controlling System of utilizing rotational speed governor and charge proportion controller control viscosity of compound fertilizer slurry simultaneously.
Background technology
China is a populous country, and grain-production occupies important position in the development of agriculture production.Usually the approach that increases grain yield is to bring more land under cultivation or increase the yield per unit area.According to China's national situation, the potentiality that continue to bring more land under cultivation are little, though still there are many unreclaimed soils in China, have the problem that investment is many, difficulty is big mostly.This has just determined the approach that China's increases in grain production must be walked to increase the yield per unit area.Fertilising can not only be increase soil fertility, and is the important measures that improve crop yield per unit.Therefore chemical fertilizer is the most basic and most important material input of agriculture production.According to Food and Argriculture OrganizationFAO (FAO) statistics, chemical fertilizer accounts for 40%～60% in the total share to increasing crop yield.China can support the population that accounts for the world 22% with the arable land that accounts for the world 7%, we can say that chemical fertilizer plays very important effect.
At present, occur various chemical fertilizer on the market, mainly contained chemical fertilizer of simple substance and the composite chemical fertilizer that contains nitrogen, phosphorus, potassium and other nutrient elements.The production method of composite fertilizer mainly contains granulating method, slurry process, extrusion process and residual mixed method etc., mainly be with urea, ammonium nitrate, coarse whiting, Repone K, etc. carry out secondary processing, make the composite fertilizer of multiple elements such as containing nitrogen, phosphorus, potassium.What the processing of composite fertilizer was adopted is the high tower prilling technology; granulating equipment mostly is melting charge slurry and sprays granulating equipment; the general melting charge slurry that adopts is sprayed granulating equipment rotary differential shower nozzle tablets press, stationary nozzle tablets press and vibration shower nozzle tablets press; wherein, the rotating sprinkler tablets press is most widely used.The granulation principle of composite fertilizer is by the form ejection of special prilling spry with thin jet fluid column with melting charge slurry, when the fluid column of ejection contacts in air, be broken into drop, and then be condensed into spheroidal particle, in time the spheroidal particle that is condensed into is sent out by travelling belt then.
In the production process of composite fertilizer, the viscosity of compound fertilizer slurry is that bonding balling-up creates conditions, if there is not the viscosity particle just to make to come out, if viscosity is too high, then easily produces big ball, thereby causes the compound fertilizer granules size produced inhomogeneous.In current production devices; no matter take rotary differential shower nozzle tablets press, stationary nozzle tablets press, vibration shower nozzle tablets press or other tablets presss; because the pressure of compound fertilizer slurry is in continuous variation in the tempering tank; therefore caused the viscosity of compound fertilizer slurry also and then constantly to change; again because the granular size of composite fertilizer is relevant with the viscosity of compound fertilizer slurry, and then caused the granular size of the composite fertilizer that produces inhomogeneous.The inhomogeneous nutrient of composite fertilizer that will cause of the granular size of composite fertilizer is inhomogeneous, influences the growth efficiency of farm crop easily and reduces the output of farm crop.In to the farm crop fertilising, also exist dissolution rate inconsistent, cause small-particle to melt the too fast and oarse-grained dissolving that is difficult to, make farm crop not absorb the fertilizer that is applied fully, cause fertilizer utilization ratio not high, cause waste.In addition, the homogeneity of compound fertilizer granules size is not only causing great influence to composite fertilizer qualitatively, brings negative influence also for the popularization and the sale of composite fertilizer, and under the situation of equal quality, people can buy evengranular composite fertilizer.
Therefore be badly in need of a kind of slurry viscosity that can control composite fertilizer, thereby make the Controlling System of the even particle size of the composite fertilizer that produces.
Summary of the invention
The Controlling System that the purpose of this invention is to provide a kind of viscosity of compound fertilizer slurry, described Controlling System can be controlled the slurry viscosity of composite fertilizer, thereby make the compound fertilizer granules size produced evenly, be easy to absorb, and then make utilization ratio height, the nutrient of composite fertilizer even, and fertilization effect and sales volume are greatly improved.
To achieve these goals, the invention provides a kind of Controlling System of viscosity of compound fertilizer slurry, comprise feed mechanism, mixing tank for coating colors, rotary nozzle, the slurry conduit, Controlling System and rotary nozzle motor, described feed mechanism is given described mixing tank for coating colors charging, described mixing tank for coating colors has the discharge port that is communicated with described slurry conduit, one end of described slurry conduit is communicated with described discharge port, the other end of described slurry conduit is communicated with described rotary nozzle, compound fertilizer slurry in the described mixing tank for coating colors carries out granulation by the described rotary nozzle that described slurry conduit enters described rotary nozzle driven by motor, described Controlling System is electrically connected with described feed mechanism and rotary nozzle motor respectively, wherein, described Controlling System comprises static tester and static viscosity control system, described static viscosity control system comprises pressure transmitter, the pressure transmitter treatment unit, signal amplifying apparatus, rotational speed governor and charge proportion controller, described static tester has at least two static containers that are hollow structure, described static container is communicated with described mixing tank for coating colors, described static container will become stationary state from the compound fertilizer slurry that shunting in the described mixing tank for coating colors is come out, described pressure transmitter correspondence be installed in the described static container and with the size of the pressure of detected compound fertilizer slurry to detect the form output of electric current, described pressure transmitter treatment unit receives described detection electric current and forms sensed current signal, and by described signal amplifying apparatus formation control signal, described control signal outputs to described rotational speed governor and described charge proportion controller, described rotational speed governor is controlled described rotary nozzle rotating speed of motor, and described charge proportion controller is controlled the charge proportion of described compound fertilizer slurry.
Preferably, described static tester also comprises test controller and static test system selector switch, described static container offers entrance and exit, described inlet is communicated with described mixing tank for coating colors, described outlet is communicated with described slurry conduit, described entrance and exit place is equipped with the static test system selector switch respectively, and described test controller is electrically connected and controls described static test switch opens with described static test system selector switch or closes.
Preferably, described static tester also comprises takes out stock pump and static test isocon, the inlet that described static test isocon is communicated with described static container is with mixing tank for coating colors and be communicated with described static outlet of container and slurry conduit, and the described mashing pump of taking out is installed on the described static test isocon and with described test controller and is electrically connected.
Preferably, described rotational speed governor comprises Schmidt trigger and frequency transformer, described frequency transformer is electrically connected with described rotary nozzle motor, described Schmidt trigger receives described control signal and output pulse width modulation signal, and described frequency transformer receives described pulse width modulating signal to control described rotary nozzle rotating speed of motor.
Preferably, described Schmidt trigger is made of 555 unicircuit, the external low-voltage dc power supply of the power end of described 555 unicircuit and reset terminal, described low-voltage dc power supply also is in series with first resistance and second resistance and also is electrically connected with the ground terminal of described 555 unicircuit, the trigger end of described 555 unicircuit and threshold voltage end all are electrically connected between described first resistance and described second resistance, between described first resistance and described second resistance as the input terminus of described Schmidt trigger.Described first resistance and second resistance play the voltage bias effect, by the biasing of voltage, with the requirement of the voltage input of guaranteeing to satisfy described trigger end and described threshold voltage end.
Preferably, also comprise phase inverter, described phase inverter is electrically connected between described signal amplifying apparatus and the described Schmidt trigger.Because described Schmidt trigger is that lower level is effective, therefore described phase inverter being set is in order to make that described Schmidt trigger can works better.
Preferably, described signal amplifying apparatus comprises first step amplifying circuit and second stage amplifying circuit; Described first step amplifying circuit comprises first integrated package and the 3rd resistance, described first integrated package has input terminus, feedback end and output terminal, the input terminus of described first integrated package and feedback end are electrically connected with two difference output ends of described pressure transmitter treatment unit respectively, described the 3rd resistance is external between the input terminus and output terminal of described first integrated package, the feedback end of described first integrated package is circumscribed with high resistance measurement over the ground, and the magnification of described first step amplifying circuit is controlled by the 3rd resistance; Described second stage amplifying circuit comprises second integrated package and the 4th resistance, described the 4th resistance is external between the input terminus and output terminal of described second integrated package, the input terminus of described second integrated package is circumscribed with high frequency capacitance over the ground, and the magnification of described second stage amplifying circuit is controlled by external the 4th resistance.The feedback end of described first integrated package connects a high resistance measurement makes the input resistance of described first integrated package in-phase input end and inverting input equate, helps improving input resistance and reduces potential difference.The external over the ground high frequency capacitance of the input terminus of described second integrated package can be realized the filtering to first step amplifying circuit output signal.
Preferably, be electrically connected with placed in-line the 5th resistance and swept resistance between the input terminus of the output terminal of described first step amplifying circuit and described second stage amplifying circuit.The setting of described the 5th resistance and swept resistance is during as the input of described second stage amplifying circuit, can reach impedance matching for the output that realizes described first step amplifying circuit, also can realize the control to magnification.
Preferably, be parallel with first potentiometer that can regulate resistance between the input terminus of described swept resistance and described second stage amplifying circuit, the described first potentiometer two ends are electrically connected with second potentiometer and the 3rd potentiometer that is electrically connected with low-voltage dc power supply respectively.Three placed in-line potentiometers are set and connect the direct supply of low pressure, purpose is the loss of offset current when flowing through first step amplifying circuit and second stage amplifying circuit.
Preferably, shown in feed mechanism comprise nitrogen slurry tank, phosphorus slurry tank and potassium slurry tank, also comprise nitrogen slurry flow switch, phosphorus slurry flow switch and potassium slurry flow switch, described charge proportion controller can be regulated the charge proportion of described compound fertilizer slurry respectively by described nitrogen slurry flow switch, described phosphorus slurry flow switch and described potassium slurry flow switch.Described material proportioning controller is regulated the charge proportion of described compound fertilizer slurry by described nitrogen slurry flow switch, described phosphorus slurry flow switch and described potassium slurry flow switch, to regulate the viscosity of described compound fertilizer slurry.
Compared with prior art, the present invention also comprises the slurry viscosity control device that is electrically connected with described feed mechanism and rotary nozzle motor respectively, described slurry viscosity controller comprises pressure transmitter, pressure transmitter treatment unit, signal amplifying apparatus, rotational speed governor and charge proportion controller, and described pressure transmitter is located in the described static container.In the production process of composite fertilizer, compound fertilizer slurry outwards sprays under the rotation of described rotary nozzle and forms compound fertilizer granules.Because the granular size of composite fertilizer is relevant with the slurry viscosity size of composite fertilizer, and the charge proportion of the rotating speed of the size of the slurry viscosity of composite fertilizer size and pressure, rotary nozzle and the interior various nutrient elements of described feed mechanism is relevant, wherein, pressure and viscosity are proportional, rotating speed and the viscosity relation of being inversely proportional to, be that pressure is big more, the slurry viscosity of composite fertilizer is just big more, and the fast more viscosity of rotating speed is just more little.Therefore, the Controlling System of viscosity of compound fertilizer slurry of the present invention utilizes pressure transmitter to detect the pressure of the compound fertilizer slurry in the mixing tank for coating colors earlier, by described pressure transmitter treatment unit and described signal amplifying apparatus detected pressure size is sent to described rotational speed governor and described charge proportion controller with the form of control signal then, control described rotary nozzle rotating speed of motor by described speed-to-pressure transducer, thereby control the rotating speed of described rotary nozzle, control the charge proportion of various nutrient elements in the described feed mechanism simultaneously by described charge proportion controller, thereby change the slurry viscosity size of composite fertilizer, and then make the compound fertilizer granules size of producing even, be easy to absorb, and then make the utilization ratio height of composite fertilizer, nutrient is even, and fertilization effect and sales volume are greatly improved.
By following description also in conjunction with the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used to explain embodiments of the invention.
Description of drawings
Fig. 1 is the structural representation of the Controlling System of a composite fertilizer of the present invention slurry viscosity.
Fig. 2 is the construction module figure of the static viscosity control system of the Controlling System of a composite fertilizer of the present invention slurry viscosity.
Fig. 3 is the construction module figure of described rotational speed governor shown in Figure 2.
Fig. 4 is the schematic circuit diagram of the Schmidt trigger of the Controlling System of a composite fertilizer of the present invention slurry viscosity.
Fig. 5 is the construction module figure that the signal amplifying apparatus of the Controlling System of a composite fertilizer of the present invention slurry viscosity is connected with Schmidt trigger.
Fig. 6 is the schematic circuit diagram of the signal amplifying apparatus of the Controlling System of a composite fertilizer of the present invention slurry viscosity.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the invention provides a kind of Controlling System of viscosity of compound fertilizer slurry, the Controlling System of described viscosity of compound fertilizer slurry is utilized the slurry viscosity of rotational speed governor and charge proportion controller control composite fertilizer simultaneously, thereby make the compound fertilizer granules size produced evenly, be easy to absorb, and then make utilization ratio height, the nutrient of composite fertilizer even, and fertilization effect and sales volume are greatly improved.
With reference to figure 1-3, the Controlling System 100 of described viscosity of compound fertilizer slurry comprises feed mechanism 10, mixing tank for coating colors 20, rotary nozzle 30, slurry conduit 40, Controlling System 50 and rotary nozzle motor 60, described feed mechanism 10 is given described mixing tank for coating colors 20 chargings, described mixing tank for coating colors 20 has the discharge port 20a that is communicated with described slurry conduit 40, one end of described slurry conduit 40 is communicated with described discharge port 20a, the other end of described slurry conduit 40 is communicated with described rotary nozzle 30, compound fertilizer slurry in the described mixing tank for coating colors 20 enters described rotary nozzle 30 by described slurry conduit 40, the described rotary nozzle 30 that described rotary nozzle motor 60 drives carries out granulation, described Controlling System 50 is electrically connected with described feed mechanism 10 and rotary nozzle motor 60 respectively, wherein, described Controlling System 50 comprises static tester 510 and static viscosity control system 520, described static viscosity control system 520 comprises pressure transmitter 521, pressure transmitter treatment unit 522, signal amplifying apparatus 523, rotational speed governor 524 and charge proportion controller 525, described static tester 510 has at least two static containers 511 that are hollow structure, described static container 511 is communicated with described mixing tank for coating colors 20, described static container 511 will become stationary state from the compound fertilizer slurry that shunting in the described mixing tank for coating colors 20 is come out, described pressure transmitter 521 correspondences be installed in the described static container 511 and with the size of the pressure of detected compound fertilizer slurry to detect the form output of electric current, described pressure transmitter treatment unit 522 receives described detection electric current and forms sensed current signal, and by described signal amplifying apparatus 523 formation control signals, described control signal outputs to described rotational speed governor 524 and described charge proportion controller 525, the rotating speed of the described rotary nozzle motor 60 of described rotational speed governor 524 controls, the charge proportion of the described compound fertilizer slurry of described charge proportion controller 525 controls.Particularly, described rotational speed governor 524 comprises Schmidt trigger 524a and frequency transformer 524b, described frequency transformer 524b is electrically connected with described rotary nozzle motor 60, described Schmidt trigger 524a receives described control signal and output pulse width modulation signal, and described frequency transformer 524b receives described pulse width modulating signal to control the rotating speed of described rotary nozzle motor 60.
With reference to figure 4, described Schmidt trigger 524a comprises input terminus Vi and the output end vo that is used to receive the control current that described signal amplifying apparatus 523 forms, described Schmidt trigger 524a passes through described output end vo output pulse width modulation signal after receiving described control current by described input terminus Vi, and described frequency transformer 524b receives described pulse width modulating signal to control described rotary nozzle motor 60.Particularly, described Schmidt trigger 524a is made of 555 unicircuit, the power end 4 of described 555 unicircuit and reset terminal 8 external low-voltage dc power supply U, particularly, described low-voltage dc power supply U is 5 volts a D.C. regulated power supply, described low-voltage dc power supply U also is in series with first resistance R 1 and second resistance R 2 and also is electrically connected with the ground terminal of described 555 unicircuit, the trigger end 2 of described 555 unicircuit and threshold voltage end 6 all are electrically connected between described first resistance R 1 and described second resistance R 2, between described first resistance R 1 and described second resistance R 2 as the input terminus Vi of described Schmidt trigger 524a.Particularly, described first resistance R 1 and described second resistance R 2 play the voltage bias effect, by the biasing of voltage, with the requirement of the voltage input of guaranteeing to satisfy described trigger end 2 and described threshold voltage end 6.
With reference to figure 5, the Controlling System 100 of described adjusting rotating speed control viscosity of compound fertilizer slurry also comprises phase inverter 526, and described phase inverter 526 is electrically connected between described signal amplifying apparatus 523 and the described Schmidt trigger 524a.Because above-mentioned Schmidt trigger 524a is that lower level is effective, therefore described phase inverter 526 being set is in order to make that described Schmidt trigger 524a can works better.
With reference to 1, described static tester 510 comprises the test controller (not shown), static test system selector switch 512, static test system selector switch 513, static test system selector switch 514, static test system selector switch 515, described static container 511a and described static container 511b all offer entrance and exit, described inlet is communicated with described mixing tank for coating colors 20, described outlet is communicated with described slurry conduit 40, described entrance and exit place is equipped with the static test system selector switch respectively, and described test controller is electrically connected and controls described static test switch opens with described static test system selector switch or closes.Therefore can make described test controller control described static container 511a and described static container 511b injection or discharge compound fertilizer slurry effectively.
Particularly, described static tester 510 also comprises takes out stock pump 516 and static test isocon 517, the inlet that described static test isocon 517 is communicated with described static container 511a and described static container 511b and mixing tank for coating colors 20 and be communicated with outlet and the slurry conduit 40 of described static container 511a and described static container 511b, the described mashing pump 516 of taking out is installed on the described static test isocon 517 and with described test controller and is electrically connected.Stock pump 516 is taken out in setting can ensure to described static container 511a and described static container 511b injection compound fertilizer slurry to be tested, and described outlet is communicated with described slurry conduit 40 can make the compound fertilizer slurry of finishing static test reclaim.The principle of work of described static tester 510 is: original state, described a plurality of described static test system selector switch is closes, described test controller to the working order of described a plurality of described static test system selector switches is: regularly open static test system selector switch 512, static test system selector switch 513, static test system selector switch 514, static test system selector switch 515, when opening, static test system selector switch 512 or static test system selector switch 514 open the described stock pump 516 of taking out, and static test system selector switch 513 or static test system selector switch 515 are closed the described stock pump 516 of taking out when opening, compound fertilizer slurry flows into static container 511a and static container 511b by described static splitting pipe 514, treat that compound fertilizer slurry becomes stationary state, described static test controller is controlled described pressure transmitter 521 induced flows and is gone into the size of pressure of the pressure of the compound fertilizer slurry in static container 511a and the static container 511b and just detected compound fertilizer slurry to detect the form output of electric current, described pressure transmitter treatment unit 522 receives described detection electric current and forms sensed current signal, and by described signal amplifying apparatus 523 formation control signals, described control signal outputs to described rotational speed governor 524 and described charge proportion controller 525, the rotating speed of the described rotary nozzle motor 60 of described rotational speed governor 524 controls, the charge proportion of the described compound fertilizer slurry of described charge proportion controller 525 controls.The frequency that described at least two static container 511a, static container 511b can improve real-time detection compound fertilizer slurry pressure is set, can controls the size of the viscosity of compound fertilizer slurry by static viscosity control system better with further control compound fertilizer granules volume.
Particularly, described feed mechanism 10 comprises nitrogen slurry tank 11, phosphorus slurry tank 12 and potassium slurry tank 13, also comprise nitrogen slurry flow switch 11a, phosphorus slurry flow switch 12a and potassium slurry flow switch 13a, described charge proportion controller 525 can be regulated the charge proportion of described compound fertilizer slurry respectively by described nitrogen slurry flow switch 11a, described phosphorus slurry flow switch 12a and described potassium slurry flow switch 13a.Described material proportioning controller 525 is regulated the charge proportion of described compound fertilizer slurry by described nitrogen slurry flow switch 11a, described phosphorus slurry flow switch 12a and described potassium slurry flow switch 13a, to regulate the viscosity of described compound fertilizer slurry.
With reference to figure 6, described signal amplifying apparatus 523 comprises first step amplifying circuit 210 and second stage amplifying circuit 220; Described first step amplifying circuit 210 comprises first integrated package 211 and the 3rd resistance R 3, described first integrated package 211 has input terminus 21a, feedback end 21b and output terminal 21c, the input terminus 21a of described first integrated package and feedback end 21b respectively with two difference output end 522a of described pressure transmitter treatment unit 522,522b is electrically connected, described the 3rd resistance R 3 is external between the input terminus 21a and output terminal 21c of described first integrated package, the feedback end 21b of described first integrated package is circumscribed with high resistance measurement R over the ground, and the magnification of described first step amplifying circuit 210 is by 3 controls of the 3rd resistance R; Described second stage amplifying circuit 220 comprises second integrated package 221 and the 4th resistance R 4, described the 4th resistance R 4 is external between the input terminus 22a and output terminal 22b of described second integrated package, the input terminus 22a of described second integrated package is circumscribed with high frequency capacitance C over the ground, and the magnification of described second stage amplifying circuit 220 is by 4 controls of external the 4th resistance R; Be electrically connected with placed in-line the 5th resistance R 5 and swept resistance R10 between the input terminus 22a of the output terminal 21c of described first step amplifying circuit and described second stage amplifying circuit; Be parallel with the first potentiometer R11 that can regulate resistance between the input terminus 22a of described swept resistance R10 and described second stage amplifying circuit, the described first potentiometer R11 two ends be electrically connected with respectively with low-voltage dc power supply+VCC and-the second potentiometer R12 and the 3rd potentiometer R13 that VCC is electrically connected.The feedback 21b end of described first integrated package connects a high resistance measurement R makes the input resistance of described first integrated package, 211 in-phase input end 21a and inverting input 21b equate, helps improving input resistance and reduces potential difference; The external over the ground high frequency capacitance C of the input terminus 22a of described second integrated package can realize the filtering to first step amplifying circuit 210 output signals; The setting of described the 5th resistance R 5 and swept resistance R10 is during as the input of described second stage amplifying circuit, can reach impedance matching for the output that realizes described first step amplifying circuit, also can realize the control to magnification; And three placed in-line potentiometer R11, R12, R13 are set and connect low pressure direct supply+VCC ,-VCC, purpose is the loss of offset current when flowing through first step amplifying circuit 210 and second stage amplifying circuit 220.
Now analyze in conjunction with the principle of work of the Controlling System 100 of Fig. 1-6 pair viscosity of compound fertilizer slurry of the present invention:
Under normal Working environment, the slurry viscosity of composite fertilizer is a certain fixed value, the even particle size of the composite fertilizer that produce this moment.In the production process of composite fertilizer, at first utilize the pressure transmitter 521 that places in the described static container 511 to detect the pressure of compound fertilizer slurry, because the viscosity and the pressure of slurry are proportional, when detected pressure becomes big, illustrate that the viscosity of slurry also becomes big accordingly; Follow described pressure transmitter 521 detected pressure is exported to described pressure transmitter treatment unit 522 with the form that detects electric current; Follow described pressure transmitter treatment unit 522 again and again the described detection electric current that receives is exported to described signal amplifying apparatus 523 with the form of sensed current signal; Export to described rotational speed governor 524 and described charge proportion controller 525 through described signal amplifying apparatus 523 described sensed current signal amplification and with the form of control signal then; Control the rotating speed of described rotary nozzle motor 60 at last by described rotational speed governor 524, thereby control the rotating speed of described rotary nozzle 30, because the rotating speed of described rotary nozzle 30 and the viscosity relation of being inversely proportional to of described compound fertilizer slurry, so the slurry viscosity of composite fertilizer is reduced by the faster rotational speed of controlling described rotary nozzle 30, simultaneously by nitrogen in the described feed mechanism 10 of described charge proportion controller 525 controls, phosphorus, the charge proportion of elements such as potassium, nitrogen in the described feed mechanism 10, phosphorus, elements such as potassium can make the slurry viscosity of composite fertilizer diminish in certain proportional range, therefore utilize described rotational speed governor 524 and described charge proportion controller 525 can make the slurry viscosity of described composite fertilizer remain on described a certain fixed value simultaneously, and then make the even particle size of the composite fertilizer that produces.In like manner, when described pressure transmitter 521 detected pressure diminish, the slurry viscosity of composite fertilizer diminishes accordingly, utilize this moment the slurry viscosity of described rotational speed governor 524 and the described composite fertilizer of described charge proportion controller 525 controls to become big simultaneously, thereby the slurry viscosity that makes described composite fertilizer remains on a certain fixed value, the even particle size of the feasible composite fertilizer that produces.
The principle of work of the related phase inverter 526 of the Controlling System 100 of viscosity of compound fertilizer slurry of the present invention, frequency transformer 524b and circuit theory are well known to those of ordinary skill in the art, no longer are described in detail at this.
As from the foregoing, in the production process of composite fertilizer, compound fertilizer slurry outwards sprays under the rotation of described rotary nozzle 30 and forms compound fertilizer granules, because the granular size of composite fertilizer is relevant with the slurry viscosity size of composite fertilizer, and the charge proportion of the rotating speed of the size of the slurry viscosity of composite fertilizer size and pressure, rotary nozzle 30 and described feed mechanism 10 interior various nutrient elements is relevant, wherein, pressure and viscosity are proportional, rotating speed and the viscosity relation of being inversely proportional to, be that pressure is big more, the slurry viscosity of composite fertilizer is just big more, and the fast more viscosity of rotating speed is just more little.Therefore, the Controlling System of viscosity of compound fertilizer slurry of the present invention utilizes pressure transmitter 521 to detect the pressure of the compound fertilizer slurry in the static container 511 earlier, by described pressure transmitter treatment unit 522 and described signal amplifying apparatus 523 detected pressure size is sent to described rotational speed governor 524 and described charge proportion controller 525 with the form of control signal then, rotating speed by the described rotary nozzle motor 60 of described rotational speed governor 524 controls, thereby control the rotating speed of described rotary nozzle 30, control the charge proportion of various nutrient elements in the described feed mechanism 10 simultaneously by described charge proportion controller 525, thereby change the slurry viscosity size of composite fertilizer, make the compound fertilizer granules size of producing even, be easy to absorb, and then make the utilization ratio height of composite fertilizer, nutrient is even, and fertilization effect and sales volume are greatly improved.
Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (10)
1. the Controlling System of a viscosity of compound fertilizer slurry, comprise feed mechanism, mixing tank for coating colors, rotary nozzle, the slurry conduit, Controlling System and rotary nozzle motor, described feed mechanism is given described mixing tank for coating colors charging, described mixing tank for coating colors has the discharge port that is communicated with described slurry conduit, one end of described slurry conduit is communicated with described discharge port, the other end of described slurry conduit is communicated with described rotary nozzle, compound fertilizer slurry in the described mixing tank for coating colors carries out granulation by the described rotary nozzle that described slurry conduit enters described rotary nozzle driven by motor, described Controlling System is electrically connected with described feed mechanism and rotary nozzle motor respectively, it is characterized in that: described Controlling System comprises static tester and static viscosity control system, described static viscosity control system comprises pressure transmitter, the pressure transmitter treatment unit, signal amplifying apparatus, rotational speed governor and charge proportion controller, described static tester has at least two static containers that are hollow structure, described static container is communicated with described mixing tank for coating colors, described static container will become stationary state from the compound fertilizer slurry that shunting in the described mixing tank for coating colors is come out, described pressure transmitter correspondence be installed in the described static container and with the size of the pressure of detected compound fertilizer slurry to detect the form output of electric current, described pressure transmitter treatment unit receives described detection electric current and forms sensed current signal, and by described signal amplifying apparatus formation control signal, described control signal outputs to described rotational speed governor and described charge proportion controller, described rotational speed governor is controlled described rotary nozzle rotating speed of motor, and described charge proportion controller is controlled the charge proportion of described compound fertilizer slurry.
2. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 1, it is characterized in that: described static tester also comprises test controller and static test system selector switch, described static container offers entrance and exit, described inlet is communicated with described mixing tank for coating colors, described outlet is communicated with described slurry conduit, described entrance and exit place is equipped with the static test system selector switch respectively, and described test controller is electrically connected and controls described static test switch opens with described static test system selector switch or closes.
3. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 2, it is characterized in that: described static tester is also taken out stock pump and static test isocon, the inlet that described static test isocon is communicated with described static container is with mixing tank for coating colors and be communicated with described static outlet of container and slurry conduit, and the described mashing pump of taking out is installed on the described static test isocon and with described test controller and is electrically connected.
4. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 1, it is characterized in that: described rotational speed governor comprises Schmidt trigger and frequency transformer, described frequency transformer is electrically connected with described rotary nozzle motor, described Schmidt trigger receives described control signal and output pulse width modulation signal, and described frequency transformer receives described pulse width modulating signal to control described rotary nozzle rotating speed of motor.
5. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 4, it is characterized in that: described Schmidt trigger is made of 555 unicircuit, the external low-voltage dc power supply of the power end of described 555 unicircuit and reset terminal, described low-voltage dc power supply also is in series with first resistance and second resistance and also is electrically connected with the ground terminal of described 555 unicircuit, the trigger end of described 555 unicircuit and threshold voltage end all are electrically connected between described first resistance and described second resistance, between described first resistance and described second resistance as the input terminus of described Schmidt trigger.
6. compound fertilizer grain volume control system as claimed in claim 4 is characterized in that: also comprise phase inverter, between described phase inverter electrical connection and described signal amplifying apparatus and the described Schmidt trigger.
7. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 1, it is characterized in that: described signal amplifying apparatus comprises first step amplifying circuit and second stage amplifying circuit;
Described first step amplifying circuit comprises first integrated package and the 3rd resistance, described first integrated package has input terminus, feedback end and output terminal, the input terminus of described first integrated package and feedback end are electrically connected with two difference output ends of described pressure transmitter treatment unit respectively, described the 3rd resistance is external between the input terminus and output terminal of described first integrated package, the feedback end of described first integrated package is circumscribed with high resistance measurement over the ground, and the magnification of described first step amplifying circuit is controlled by the 3rd resistance;
Described second stage amplifying circuit comprises second integrated package and the 4th resistance, described the 4th resistance is external between the input terminus and output terminal of described second integrated package, the input terminus of described second integrated package is circumscribed with high frequency capacitance over the ground, and the magnification of described second stage amplifying circuit is controlled by external the 4th resistance.
8. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 7 is characterized in that: be electrically connected with placed in-line the 5th resistance and swept resistance between the input terminus of the output terminal of described first step amplifying circuit and described second stage amplifying circuit.
9. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 8, it is characterized in that: be parallel with first potentiometer that can regulate resistance between the input terminus of described swept resistance and described second stage amplifying circuit, the described first potentiometer two ends are electrically connected with second potentiometer and the 3rd potentiometer that is electrically connected with low-voltage dc power supply respectively.
10. the Controlling System of viscosity of compound fertilizer slurry as claimed in claim 1, it is characterized in that: shown in feed mechanism comprise nitrogen slurry tank, phosphorus slurry tank and potassium slurry tank, also comprise nitrogen slurry flow switch, phosphorus slurry flow switch and potassium slurry flow switch, described charge proportion controller can be regulated the charge proportion of described compound fertilizer slurry respectively by described nitrogen slurry flow switch, described phosphorus slurry flow switch and described potassium slurry flow switch.
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| CN200910194183A CN101709010B (en) | 2009-11-26 | 2009-11-26 | Control system for viscosity of compound fertilizer slurry |
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| CN200910194183A CN101709010B (en) | 2009-11-26 | 2009-11-26 | Control system for viscosity of compound fertilizer slurry |
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| CN101709010A true CN101709010A (en) | 2010-05-19 |
| CN101709010B CN101709010B (en) | 2012-09-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863266A (en) * | 2012-08-31 | 2013-01-09 | 北京农业智能装备技术研究中心 | Device and method for proportioning fertilizers automatically |
| CN102964157A (en) * | 2012-10-31 | 2013-03-13 | 北京农业智能装备技术研究中心 | Automatic proportioning device and method for granulated fertilizer |
| CN104193445A (en) * | 2014-08-21 | 2014-12-10 | 曹凯 | Control system for slurry viscosity and particle volume of compound fertilizer |
| CN106956355A (en) * | 2017-04-28 | 2017-07-18 | 四川美霖科技有限责任公司 | A kind of production system and its control method for automating gypsum lightweight hollow partition board |
| CN113985783A (en) * | 2021-10-29 | 2022-01-28 | 中山东菱威力电器有限公司 | Ice cream slurry existence detection circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU633605A1 (en) * | 1977-06-20 | 1978-11-25 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт По Автоматизации Предприятий Промышленности Строительных Материалов | System of automatic control of slurry viscosity at mill outlet |
| US4397561A (en) * | 1981-05-11 | 1983-08-09 | William A. Strong | Slurry production system |
-
2009
- 2009-11-26 CN CN200910194183A patent/CN101709010B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863266A (en) * | 2012-08-31 | 2013-01-09 | 北京农业智能装备技术研究中心 | Device and method for proportioning fertilizers automatically |
| CN102964157A (en) * | 2012-10-31 | 2013-03-13 | 北京农业智能装备技术研究中心 | Automatic proportioning device and method for granulated fertilizer |
| CN104193445A (en) * | 2014-08-21 | 2014-12-10 | 曹凯 | Control system for slurry viscosity and particle volume of compound fertilizer |
| CN106956355A (en) * | 2017-04-28 | 2017-07-18 | 四川美霖科技有限责任公司 | A kind of production system and its control method for automating gypsum lightweight hollow partition board |
| CN113985783A (en) * | 2021-10-29 | 2022-01-28 | 中山东菱威力电器有限公司 | Ice cream slurry existence detection circuit |
| CN113985783B (en) * | 2021-10-29 | 2022-09-02 | 中山东菱威力电器有限公司 | Ice cream slurry existence detection circuit |
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|---|---|
| CN101709010B (en) | 2012-09-05 |
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