JPS5930461B2 - Automatic grain feed rate adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to reduce the amount of grain supplied to a huller by controlling the amount of grain supplied to the huller by controlling the amount of grain in the induction funnel of a grain sorter, such as a paddy sorter, which performs the next step of sorting work after the huller. The present invention relates to an automatic grain supply amount adjustment device for quickly controlling the amount of grains to be supplied depending on the amount of grains to be filled.

Conventionally, the amount of grain supplied to the huller was adjusted by monitoring the amount of grains discharged from the huller after processing and the amount of grain supplied to the grain processing machine in the next process. This was a tedious task that required constant manual labor, as the opening of the grain supply valve of the hulling machine had to be adjusted.

Therefore, the present invention aims to automate such monitoring work and adjustment operation, and its configuration is such that the grain supply valve 10 of the huller 1 that supplies grains to the grain processing machine 3 is opened at a constant speed. Or, the valve opening adjustment device M is configured to close, and a current whose flowing direction and intensity change depending on the bias value of the filling amount of grains in the induction funnel 5 provided in the grain processing machine 3 with respect to the target value. The operation time of the filling amount detector DT is set such that the amount of filling is generated, and the operation time of the valve opening controller M is set in proportion to the bias value so that the grain supply valve 10 is closed when the bias value is positive. A closing time setting section 14 configured to stop the valve opening adjustment device M for a period of time inversely proportional to the pressure deviation value, and a closing stop time setting section 12 configured to stop the valve opening adjustment device M for a time inversely proportional to the pressure deviation value, An opening time setting unit 15 is configured to set the operating time of the valve opening adjustment device M in proportion to the bias value so that the grain supply valve 10 opens when Opening stop time setting unit 13 configured to stop for a time inversely proportional to the bias value of the quality described above.
While the bias value exists, the closing time setting section 14 and the closing stop time setting section 12, or the opening time setting section 15 and the opening stop time setting section 15 operate alternately. The automatic grain feed rate adjusting device is configured to close or open the grain feed 'jF10 in stages while the filling 1 of grains in the induction funnel 5 does not match the target value. Then, the greater the deviation value, the smaller the increments of this step are, so that the grain supply valve 10 is largely closed or widely opened in a short period of time, so that followability is improved. For example, when the bias value is positive, the time for the grain supply valve 10 to operate becomes longer in proportion to the magnitude of the bias value, and the time it takes to stop its closing operation decreases inversely. The closing operation and the stopping of the closing operation are alternately repeated in stages to prevent bunching and to obtain a simple proportional speed operation with good response characteristics, thereby maintaining a stable state. A simple adjustment device that can quickly converge to the target value has been achieved.

Next, the structure of the present invention will be explained based on one embodiment shown in the drawings. The grains discharged from the huller 1 shown in FIG. When supplying grain to the grain tank 4 of No. 3, the induction funnel 5 housed in the grain tank 4 is supported via a spring T so that it can be moved vertically and parallelly by a parallel link 6.6. Machine 1 hopper 8
The opening of the grain supply valve 10 for controlling the amount of grain flowing down from the hulling rolls 9, 9 to the hulling rolls 9, 9 is adjusted by an opening adjustment motor such as an opening adjustment motor. In other words, when the normally open contact a0 of relay A1 is closed, the opening adjuster rotates in the direction to close the grain supply valve 10;
When the normally open contact a2 of No. 2 is closed, the opening adjuster M is connected so that it still rotates in the direction of opening the grain supply valve 10. In particular, in this invention, the opening inside the induction funnel 5 is connected as described below. While the filling amount of grains is too large, for example because it exceeds the target value, the normally open contact a1 of relay A1 is opened and opened in a stepwise manner continuously. The time that the open contact a1 is closed is a large value in proportion to the excess of the filling amount, that is, the deviation value, and the next step, the time that the normally open contact a1 is bent, is the opposite of this deviation value. The control circuit is constructed so that the value is proportionally small.

That is, as shown in the opening of FIG. p, and both ends of the sliding resistor R are connected from the normally open contact a1 of the relay A1 to the coil of the relay A1, and from the normally open contact a2 of the relay A2 to the coil of the relay A2, respectively, to the DC power source E (c). It comes to the side.

'Here, since the configurations of the control circuits 11 for operating relays A and A2 are exactly the same, relay A1
To explain only the circuit related to DC power supply E (
The a) side is connected to the collector of the npn transistor Tr1 via the normally closed contact b1 of the relay B1 for cutting off the relay A1, and the emitter of the transistor Tr1 is connected to the gate of the thyristor 5CR1 branching from the normally closed contact b1. The base of the transistor Tr1 is connected to the divided resistor R1 of the relay A1 side of the sliding resistor R divided by the sliding brush P.
As the induction funnel 5 rises, the sliding brush P slides in the direction of decreasing the divided resistance R1.
When the current flowing through increases, the capacitor C1 connected between the base of the transistor Tr1 and the (C) side of the thyristor SCR starts charging, and when the capacitor C1 is charged to a predetermined voltage, the base of the transistor Tr1 increases. As the potential rises, the transistor Tr1 becomes conductive, and as the emitter voltage rises, the Zener voltage of the Zener diode Dz1 rises, and in order to open the gate of the thyristor 5CR1, the thyristor SCR1 is connected from the DC power supply E through the normally closed contact b1.
The current flowing through excites the coil of relay A1 and
1 is operated, and at the same time, both ends of capacitor C1 are short-circuited at normally open contact a1, and discharge is caused by the coil of relay A1, and relay A1 is connected to normally closed contact b1 of relay B1.
The time it takes to re-energize in this way after being demagnetized by capacitor C1, transistor Tr1. It consists of a diode Dz1 and a normally open contact a1 of a relay A1, and when the bias value is positive, a closing stop time setting that stops the valve opening adjustment device M for a time inversely proportional to the bias value. 12 and the charging current flowing through the dividing resistor R0.

On the other hand, relay B provided to cut off this relay A1
Simply put, the circuit that operates relay A1 is the above-mentioned relay A1.
The circuit is almost the same as the circuit of relay A1, but instead of sliding resistance R in the circuit of relay A1, sliding resistance R3 is replaced with transistor Tr3.
The base of the brush P is inserted between the collectors, and the brush P slides on this sliding resistance R in the direction that the divided resistance R1 of the sliding resistance R decreases.
1 slides, the sliding brush P3 of the sliding resistance R3 and the filling amount detector D are arranged so that the resistance of the sliding resistance R3 increases when
The sliding brush P1 of T is moved, and the capacitor C3,
It consists of a normally open contact of a transistor Tr3, a diode Dz3, and a relay B1, and the operating time of the valve opening controller M is proportional to the bias value so that the grain supply valve 10 is closed when the bias value is positive. Closing time setting section 1
4 is formed so that the set time increases or decreases depending on the current flowing through the sliding resistor R3.

That is, when the bias value of the filling amount is large, the effective resistance of the sliding resistor R3 increases, contrary to the decrease in the dividing resistor R1.
In order to reduce the charging current of the capacitor C3 and increase the charging time, after the relay B1 is demagnetized by the normally open contact a1 of the relay A1, the transistor Tr3 is made conductive by charging the capacitor C3 of the setting section 14, and the thyristor 5CR3 is turned on. The time it takes for relay B1 to be energized again after the gate is opened, that is, the time set by setting section 14, increases, which increases the time that relay A1 is in the on state.

In addition, as long as the dividing resistor R1 is not large enough to charge the capacitor C1 to a predetermined voltage with the current flowing therethrough, the relay A1. B1 is repeatedly turned on and off in a see-saw manner, and the opening degree adjusting machine M gradually decreases the opening degree of the grain supply valve 10.

On the other hand, while the filling amount of the induction funnel 5 is below the target value, the value of the dividing resistor R2 on the relay A2 side of the sliding resistor R divided by the sliding brush P of the filling amount detector DT is Therefore, as long as the value of this dividing resistor R2 is below a value that allows the current flowing through it to charge capacitor C2, which is the trigger for operating relay A2, to a predetermined voltage, relay A2 and relay B2 are activated. The opening regulator M increases the opening of the grain supply valve 10 step by step in order to alternately turn on and off, and the sliding resistance R4 provided in the circuit of relay B2 has a Similar to the movement of the sliding brush P3, when the dividing resistance R2 decreases, this sliding brush P4 moves this sliding brush P4 into the sliding direction of the filling amount detector DT so as to increase the effective resistance of the sliding resistance R4. Interlocked with moving brush P, capacitor C4
Transistor Tr4, diode Dz4 and relay B
The opening time is made up of two normally open contacts b2, and the operating time of the valve opening adjuster M is set in proportion to the bias value so that the grain supply valve 10 opens when the bias value is negative. Setting section 15
In addition, when the bias value is negative, the opening stop time setting section 13, which includes a capacitor C2, a transistor Tr2, a diode D'ZJ2, and a normally open contact a1 of the relay A2, controls the valve opening degree regulator M to It is configured to stop for a time that is inversely proportional to this bias value.

Note that other setting sections 12, 13, 14, and 15 having the same functions as the illustrated example can be used.

In addition, in the above-mentioned embodiment, the filling amount detector DT uses a sliding brush P that slides on a sliding resistance R.
For example, if a non-contact detector such as a differential transformer or a capacitive converter is used, fire resistance can be improved and generation of harmful noise can be prevented.

Therefore, for example, when the filling amount of grains in the induction funnel 5 exceeds the target value, the induction funnel 5 sinks too much in the grain tank 4, so the dividing resistance R1 becomes too small, and the capacitor C1 becomes When charged to a predetermined voltage, relay A operates as described above, and capacitor C3 is charged and relay B1 operates, and relay A1 operates as relay B1.
is demagnetized by turning off the normally closed contact b2 of relay A1. B1 is designed to reduce the opening degree of the grain supply valve 10 step by step as shown by the solid line in the graph of FIG. The larger the deviation value, the smaller the dividing resistor R1 becomes, and the larger the current flowing through the capacitor C1, the faster the capacitor C1 is charged, increasing the time it takes for relay A1, which is in the off state, to turn on. is shortened from the solid line in Figure 4 as shown by the two-dot chain line,
At the same time, the effective resistance of sliding resistor R2 with a large deviation value decreases, and the current flowing through capacitor C3 becomes smaller, so the time it takes for capacitor C3 to conduct transistor T r 3 becomes longer, and therefore relay B1 The time it takes for relay A1 to turn on, that is, the time it takes for relay A1 in the on state to turn off, becomes longer as shown by the two-dot chain line from the solid line in FIG.
The time it takes for the opening degree of the grain supply valve 10 to reach a certain value is shortened from t3 to t2, and the speed of change in the opening degree of the grain supply valve 10 changes approximately in proportion to the magnitude of the deviation value. The speed operation is obtained by the above-mentioned circuit configuration based on the repetition of the proportional position operation shown by the dashed line in FIG.

Since the automatic grain supply amount adjustment device according to the present invention is configured as described above, the amount of grains supplied from the huller 1 to the grain processing machine 3, that is, the amount of filling in the induction funnel 5, is When the grain processing machine 3 has an appropriate throughput, that is, is biased to the target value, and while this bias value exists, the grain supply valve 10 is
performs a closing operation and a closing stop in stages, or an opening operation and an opening stop, and thus performs a closing operation or an opening operation in a stepwise manner, and moreover, the above deviation value is The increments of this step operation are controlled to become smaller according to the size, and as the deviation value increases, the filling amount matches the target value earlier, and the tracking In addition, it is possible to prevent the bunching phenomenon in which the opening degree of the grain supply valve 10 alternately increases and decreases during control.

That is, like the controlled object of the present invention, the valve opening adjustment mechanism M
In a bacteriostatic system that has a relatively slow response speed, such as opening and closing the grain supply valve 10 to match the filling amount of grains in the induction funnel 5 to a target value, the bunching phenomenon described above is likely to occur. However, in the present invention, as described above, the opening degree of the grain supply valve 10 is reduced by a predetermined amount proportional to the bias value, and then is kept unchanged for a period of time inversely proportional to the bias value. Wait for the filling amount to reach a steady state during this time while maintaining the opening, and if a bias value still exists,
Furthermore, since the opening degree of the grain supply valve 10 is controlled to be reduced by a predetermined amount, it is almost impossible for the grain supply valve 10 to be closed too much, and the bunching phenomenon is less likely to occur. Thus, an automatic adjustment device has been obtained which can sufficiently prevent the bunching that tends to occur in simple proportional speed control and has good followability.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a huller to which the grain supply amount automatic adjustment device according to the present invention is applied, and Fig. 2 is a sorting machine that sorts grains discharged from the huller. 3A is a circuit diagram showing the connection of the opening adjustment motor of this invention device, FIG. is a chart showing the relationship between the elapsed time and the change in the opening degree of the grain supply valve. Description of symbols: 1... Huller, 2... Paddy sorter, 3... Grain processing machine, 4... Grain tank, 5... ... Induction funnel, 6 ... Parallel link, 7 ... Spring, 8 ... Hopper, 9 ... Hulling roll, 10 ... ... Grain supply valve, 11 ... Control circuit, 12, 13, 14,
15...setting section, M...opening adjustment machine,
al, C2... Normally open contact, A1 t A2 y
B1 t B2...Relay, bl, b2...
...Normally closed contact, E...DC power supply, DT...
...Filling amount detector, Ry R3+ R4...
・Sliding resistance, R1, R2...Divided resistance, Pl,
B3. B4...Sliding brush, Trl. Tr2 y Tr3 t Tr4・'・” l' transistor, 5CR1゜5CR2, 5CR3, 5CR4...
... Cyrisk, C11C2, C3, C4...
・Capacitor, Dzl t DZ2 tDz3 y D
z4...Zener diode.

Claims (1)

[Claims] 1. A valve opening adjustment machine M that opens or closes the grain supply valve 10 of the huller 1 that supplies grain to the grain processor 3 at a constant speed, and an induction funnel provided in the grain processor 3. A filling detector D is configured to generate a current whose flow direction and strength change depending on the deviation value of the filling amount of the grains in the grain from the target value.
T, and a closing time setting unit configured to set the operating time of the valve opening adjustment device M in proportion to the bias value so that the grain supply valve 10 closes when the bias value is positive. 14, a closing stop time setting unit 12 configured to stop the valve opening degree regulator M for a time inversely proportional to the pressure bias value, and a grain supply valve 10 when the bias value is negative. an opening time setting section 15 that sets the operating time of the valve opening adjustment device M in proportion to the deviation value so that the valve opening adjustment device M opens; The opening stop time setting section 13 is configured to stop for a proportional period of time, and while the bias value exists, the closing time setting section 14 and the closing stop time setting section 12 or the opening stop time setting section 13 are configured to stop for a proportional time. An automatic grain supply amount adjusting device configured such that a time setting section 15 and an opening/stopping time setting section 15 operate alternately.