SU1418057A2 - Regulator of fluidity of concrete mix - Google Patents

Abstract

The invention relates to the production of concrete mixes. Allows you to increase the reliability of the controller. It contains a power sensor 1 included in the circuit of one of the phases of the engine supply 2, a smoothing filter 3, a null organ 4, a memory 5, an adder 6, a concrete mixture mobility sensor 7, a multiplication unit 8, an adder 9, sensors lOi-10p weight by the number of components, differentiator 11, synchronizer 12, trigger 13, diode 14, power amplifier 15, water supply actuator 16, diode 17, power amplifier 18, and concrete discharge actuator 19. 3 il.

Description

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The invention relates to the field of the production of concrete mixes and is an improvement in the regulator of the mobility of a concrete mix according to the author. St. No. 1333586.

The purpose of the invention is to increase the reliability of the controller.

FIG. 1 is a block diagram of a concrete mobility control unit; in fig. 2 is a block diagram of a synchronizer; in fig. 3 - graphs of the change in the motor current of the concrete mixer during one mixing cycle for different values of the mixture mass.

The concrete flow mobility regulator (Fig. 1) contains a power sensor 1 connected to the circuit of one of the phases of the engine 2 power supply, the power sensor 1 output is connected to the input of the smoothing filter 3. The output is smoothing, its filter 3 is connected to the first informative input

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filter 3 is fed to the first input of the null organ 4, as well as to the informative inputs of the storage device 5 and differentiator 11. Upon completion of unloading the concrete mixture from the concrete mixer in the previous batch, the synchronizer 12 impulses 21 are fed to the control input of the storage device 5 . The storage device remembers the value of the signal from the output of the smoothing filter 3, which characterizes the motor current when the concrete mixer is idle. The memorized value of the signal is applied to the first input of the adder 6, to the second input of which a signal is received from the mobility unit 7. The signal setpoint 7 mobility characterizes the difference between the magnitude of the motor current of the concrete mixer at the time the concrete mixture reaches the desired mobility and the magnitude of the no-load current

null organ 4, and also with an informative 20 concrete mixer. This difference is for a given

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the input of the memory device 5. The output of the memory device 5 is connected to the first input of the adder 6, the second input of the adder b is connected to the output of the mobility unit 7, and the third input is connected to the output of the multiplication unit 8. The input of the multiplication unit 8 is connected to the output of the adder 9, the inputs of which are connected to the sensors 10 | -10 „weight by the number of components.

The output of the smoothing filter 3 is also connected to the informative input of the differentiator 11, and the control input of the differentiator 11 is connected to the first output of the synchronizer 12. The second output of the synchronizer 12 is connected to the control input of the storage device 5 and to the first input of the trigger 13. The second input of the trigger 5 Hera 13 is connected to the output of the differentiator 11, and the output of the trigger 13 is connected to the control input of the zero-organ 4. The output of the zero-organ 4 is connected to a diode 14, which is connected to the series-connected power amplifier 15 and executives water supply mechanism 16, and diode 17 which is connected to the series-connected power amplifier 18 and the actuator 19 discharging the concrete mixture.

The synchronizer 12 (FIG. 2) consists of two identical driver formers 20 and 21 of control pulses. The output of the first shaper 20 is connected to the control input of the differentiator 11, and the output of the second shaper 21 is connected to the control input of the Bis memory device by the first input of the trigger 13.

The regulator of mobility of the concrete mix works as follows.

One of the phases of the engine power supply 2 of the concrete mixer includes a power sensor 1, the signal from the output of which is fed to the input of the smoothing filter 3. The useful signal from the output of the smoothing

the magnitude of the mobility at-constant mass of material in the mixer is a constant value. After the end of the dosing from the lOi -10 „sensors of the weight (n is the number of components from which the mixture is prepared), signals that characterize the actually measured quantities of materials are fed to the inputs of the adder 9. A signal from the output of the adder 9, characterizing the mass of the mixture in the mixer, is fed through the multiplication unit 8, where it is multiplied by a certain proportionality coefficient K, which characterizes the influence of the mass of the mixture on the motor current of the concrete mixer, to the third input of the adder 6. The selection of the proportionality coefficient K (as and graduation of the mobility unit) is performed by known methods based on experimental data. In the adder 6, the signals from the memory device 5, the mobility unit 7 and the multiplication unit 8 are added and the resulting signal is fed to the second input of the zero organ 4.

The control pulse from the generator 21 of the synchronizer 12, which includes a memory device 5, simultaneously enters the first input of the trigger 13. In this case, the trigger is set to the zero state and turns off the zero-organ 4. After the dosing of components and their loading into the mixer-control pulse from the generator 20 of the syn5Q chroniser 12 includes a differentiator 11, the information input of which receives a signal from the output of the smoothing filter 3.,

As materials move and the mixture moves to a moving state, the current

55 the engine of the concrete mixer falls and, when the mixture becomes sufficiently homogeneous in composition, is set at a certain specific level. At the moment when proiz40

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filter 3 is fed to the first input of the null organ 4, as well as to the informative inputs of the storage device 5 and differentiator 11. Upon completion of unloading the concrete mixture from the concrete mixer in the previous batch, the synchronizer 12 impulses 21 are fed to the control input of the storage device 5 . The storage device remembers the value of the signal from the output of the smoothing filter 3, which characterizes the motor current when the concrete mixer is idle. The memorized value of the signal is applied to the first input of the adder 6, to the second input of which a signal is received from the mobility unit 7. The signal setpoint 7 mobility characterizes the difference between the magnitude of the motor current of the concrete mixer at the time the concrete mixture reaches the desired mobility and the magnitude of the no-load current

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the magnitude of the mobility at-constant mass of material in the mixer is a constant value. After the end of the dosing from the lOi -10 „sensors of the weight (n is the number of components from which the mixture is prepared), signals that characterize the actually measured quantities of materials are fed to the inputs of the adder 9. A signal from the output of the adder 9, characterizing the mass of the mixture in the mixer, is fed through the multiplication unit 8, where it is multiplied by a certain proportionality coefficient K, which characterizes the influence of the mass of the mixture on the motor current of the concrete mixer, to the third input of the adder 6. The selection of the proportionality coefficient K (as and graduation of the mobility unit) is performed by known methods based on experimental data. In the adder 6, the signals from the memory device 5, the mobility unit 7 and the multiplication unit 8 are added and the resulting signal is fed to the second input of the zero organ 4.

The control pulse from the generator 21 of the synchronizer 12, which includes a memory device 5, simultaneously enters the first input of the trigger 13. In this case, the trigger is set to the zero state and turns off the zero-organ 4. After the dosing of components and their loading into the mixer-control pulse from shaper 20 synQ chronizer 12 includes a differentiator 11, the information input of which receives a signal from the output of the smoothing filter 3.,

As materials move and the mixture moves to a moving state, the current

5, the concrete mixer engine falls and, when the mixture becomes sufficiently homogeneous in composition, is set at a certain specific level. At the moment when

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The tandem device 5 and the first input of the trigger 13 receive a control ngpulse. In this case, the trigger is set to the zero state and turns off the null organ 4, and the memory 5 remembers the value of the current when the mixer is idling.

A new moving cycle begins.

The mobility of the mixture depends not only on the amount of water, but also on such properties

the water signal arriving at the input of the differentiator 11 becomes zero, which means that the mixer motor current has been established; from the output of the differentiator 11 to the second input of the trigger 13 a control pulse arrives, which overturns the trigger and sets it to a single state. In this case, the output signal of the trigger 13 is fed to the control input of the zero-body 4 and includes

last. The zero-organ 4 begins comparing the moisture content and granulometric composition of the incoming signals to its informative fillers, the activity, the normal output signals from adder 6 and the smoothing and the fineness of the cement,

It is impossible to estimate the required mobility and qualitatively. Outcome of this dose of water in

the actual. Depending on the sign of the recipe of the concrete mix, the signals from the smoothing filter by the laboratory are calculated using the averaged experimental data given by the adder 6 at the output of the zero-body 4 about variations in the properties of the components and their

there will be either a positive or negative effect on the mobility of the mixture. For exclusive signal. If the difference between the signaling cases of concrete preparation

positive, which means that the actual mixture with greater mobility than the required mobility is lower than the required, 20 seconds, it is necessary to dose the water into a smaller signal from the output of the null organ 4. this quantity, which requires laboratory transmission on the recipe so that the regulator

the diode 14 and does not transmit the mobility to the required magnitude of 17, included in the reverse direction. Empirically, it is established that not. As water enters the circulating and sufficient underfilling of the concrete mixer and moves the mixture, it makes up 3-5% of the amount given by the mobility increases, which means that the recipe starts.

can reduce the current of the engine to the concrete-using the invention will allow

citel. When the values of the signals from the burned-out account increase the reliability of the operation of the control filter 3 and the adder 6 of the torus, adjust the mobility of the concrete

they compare, at the output of the null organ 4 along the B-DZ of the mixture, to reduce the expenditure of an expensive, negative signal. In this case, in order to obtain guaranteed mardach water, the diode 14 of concrete,

Do not miss a negative signal. The negative signal is transmitted by the diode 17 and through the power amplifier 18 turns on the actuator 19 for unloading the finished concrete 35.

If, when the zero-organ 4 is switched on by the trigger 13, the signal from the smoothing filter 3 is less than the signal from the adder 6, then the formula of the invention

A meaningful signal from the output of the null organ 4 immediately turns on the actuator 19 for unloading the concrete mix from the mixer.

After shipment of the mixture from the former, 21 synchronizer pulses 12 are stored at 40

Regulator of mobility of the concrete mixture according to ed. St. 1333586, characterized in that, in order to improve the reliability of the controller, it is equipped with weight sensors according to the number of components, an additional adder and a multiplication unit, and the weight sensors are connected to the corresponding inputs of the additional adder, the output of which is connected through the multiplication unit to the corresponding adder input.

The tandem device 5 and the first input of the trigger 13 receive a control ngpulse. In this case, the trigger is set to the zero state and turns off the null organ 4, and the memory 5 remembers the value of the current when the mixer is idling.

A new moving cycle begins.

The mobility of the mixture depends not only on the amount of water, but also on such properties

as humidity and granulometric composition of aggregates, activity, normal gus Formula of the invention

Regulator of mobility of the concrete mixture according to ed. St. 1333586, characterized in that, in order to improve the reliability of the controller, it is equipped with weight sensors according to the number of components, an additional adder and a multiplication unit, and the weight sensors are connected to the corresponding inputs of the additional adder, the output of which is connected through the multiplication unit to the corresponding adder input.

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Claims (1)

Claim The regulator of mobility of the concrete mix according to ed. St. No. 1333586, characterized in that, in order to increase the reliability of the regulator, it is equipped with mass sensors according to the number of components, an additional adder and a multiplication unit, and the mass sensors are connected to the corresponding inputs of the additional adder, the output of which is connected through the multiplication unit to the corresponding input of the adder. Fi g. 2