JPS62168529A - Grain mixing apparatus - Google Patents

Abstract

PURPOSE:To mix a plurality of grains at a predetermined wt. ratio, by providing a shutter control circuit for controlling an opening and closing degree by operating the electromotive apparatus of a shutter by comparing a wt. detected by each weighing machine with a set wt. CONSTITUTION:Shutters 2A-2D, carrier machineries 3A-3D and a belt conveyor 5 are started and stopped by the signal from a start/stop control circuit A through a shutter control circuit C and a feed machinery control circuit B. The carrier machinery control circuit B makes the feed speeds of the feed machineries variable on the basis of an external instruction and the shutter control circuit C inputs the wt. detected by each of the weighing machines 4A-4D to compare the detected wt. with a preset predetermined wt. and determines the opening and closing degree of each shutter and the opening and closing operation of the shutter 2 is performed according to the determined value to load a predetermined wt. of grain on each of the carrier machineries 3A-3D.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a grain mixing device, and more specifically, it measures and discharges grains from a plurality of tanks storing different types of grains. The discharged grains are mixed and transported to the next process.

2. Description of the Related Art Conventionally, when grains are mixed while being discharged from a plurality of storage tanks at a required ratio, the opening/closing degree of the discharge shutter of each storage tank is generally adjusted in accordance with the mixing ratio. However, due to the difference in the moisture content of the grains, the coefficient of friction between the grains and the friction coefficient between the grains and the storage tank is different, so the speed at which the grains are discharged from the storage tank is different. The opening degree of the shutter is not proportional to the amount of grain discharged. For example, even if the opening of the shutter is adjusted to the same degree, the amount of grain discharged will vary, and the above conventional method cannot accurately discharge and discharge grains. Mixing was not possible.

In addition, conventional methods have been used to forcibly discharge grains from storage tanks using a rocker valve, but in this method, the discharge is performed by volume ratio, and it is not possible to discharge or mix by weight ratio. .

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide an inexpensive device for accurately discharging and mixing grains from a storage tank according to their weight ratio.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides shutters operated by an electric device to freely adjust the degree of opening and closing, each of which is provided at the lower outlet of a plurality of grain storage tanks arranged in parallel. A measuring device that is capable of simultaneously measuring each of the conveying devices and the grains being conveyed by the conveying devices, in which conveying devices with variable conveying speeds are provided at positions separated by a certain distance below each shutter. A conveyor such as a belt conveyor is placed perpendicular to the downstream end of these parallel conveyors, and the conveyor transfers the grains discharged from each of the above conveyors to the next process. The shutter control circuit compares the weight detected by the second scale weighing device with a set weight and adjusts the opening/closing degree by operating the electric device of the shutter; A transport equipment control circuit that changes the transport speed of the equipment according to instructions from the outside, and a transport equipment, shutter, and transport machine for the next process via the transport equipment control circuit and shutter control circuit by external start/stop operations. The present invention provides a grain mixing device characterized by comprising a start/stop control circuit for starting and stopping the grain mixing device.

EXAMPLES Hereinafter, the present invention will be explained in detail with reference to examples shown in the drawings.

In FIG. 1 showing the entire device, IA, IB, IC, I
D is a grain storage tank installed in parallel, 2A, 2B,
2C and 2D are shutters 3A attached to the lower exits of the tanks IA to ID, respectively.

3B, 3C, and 3D are conveyance devices arranged a certain distance downward from each of the shutters 2A to 2D; 4A, 4B, and 4;
C, 4D are each of the above-mentioned transport devices 3A to 3D and the transport device 3A.
〜3D is a scale capable of simultaneously weighing the grains carried and conveyed; A belt conveyor 7 on which the grains are loaded and conveyed is an elevator installed at the downstream end of the belt conveyor 5, which mixes the grains input from the belt conveyor 5 and then transports them to the next process.

"Second group number shutters 2A to 2D, conveyance devices 3A to 3D, and belt conveyor 5, which is a conveyance machine to the next process, are
As shown in the figure, the apparatus is started and stopped by a signal from a start/stop control circuit 8 via a shutter control circuit C and a transport device control circuit B. The two-legged conveyance device control circuit 3 changes the conveyance speed of the conveyance devices 3A to 31) by external commands, and the gloss control circuit C detects the speed of the two-legged conveyance devices 4A to 4D by means of external commands. By manually measuring the weight, comparing the detected weight with a predetermined weight to determine whether the degree of opening and closing of the glosser is excessive or insufficient, and opening and closing the shutter 2 according to this determined value, the shutter 2 is always opened and closed at a predetermined level. The weight of grains is adjusted so that it is loaded on each of the conveying devices 3A to 3D.

Further, a level sensor 20 for detecting the presence or absence of grain is installed at the lower outlet of each tank IA to ID, respectively, and the detection signal from the level sensor 20 is inputted to the manual start/stop side circuit A, and the detection signal Accordingly, the operations of the conveying devices 3A to 31) and the belt conveyor 5 are controlled via the conveying device control circuit B.

3 and 4, the structures of the shutters 2Δ to 2D attached to the lower exits will be explained in detail with reference to FIGS. 3 and 4.

A rectangular cylindrical take-out part +, tlO with upper and lower openings is connected to the lower end opening of each tank IA to ID, and an outer frame 11 of the glosser device is fixed to the lower end of the take-out member IO. The outer frame 11 is formed with a discharge port 11a that communicates with the opening of the tank and the opening of the extraction member, and the discharge port 11a is opened and closed by an opening/closing plate 12 of a shutter so that the degree of opening and closing can be adjusted. There is. That is, a motor 6 equipped with a reduction gear 13 is fixed to the lower surface of the F frame portion 11b of the outer frame 11, and a sprocket (I4.15) is installed on the upper surface of the lower frame. A chain 16 is wound between the sprocket I.14 and the sprocket 15, and the opening/closing plate 12 is connected to the chain 16 via a stopper 17. The opening/closing plate I2 is slidably placed on the guide frame part 11c-1 which is erected on the upper surface of the lower frame part 11b on both its front and rear sides, and is moved by the forward and reverse rotation of the motor 6. , the discharge port 11a can be opened and closed, and its opening area can be freely adjusted.

Further, a mitt switch 18 to open and a mitt switch 19 to close are installed in the outer frame 11, so that when the opening/closing plate 12 is fully opened, the stopper 17 presses the mitt switch 18 to open. On the other hand, when the opening/closing plate 12 is in the fully closed state, the stopper 17 presses the closing mitt switch 19. Furthermore, the above-mentioned level sensor 20 for detecting the presence or absence of grains is attached to the extraction member 10 of the -L section of the shutter device (J).

Next, let me explain the control circuit of this device.

First, the start/stop control circuit A, which starts and stops the entire apparatus, has a configuration shown in FIG. IDB1 is the start button of the device, and PB2 is the stop button of the device.When FBI is pressed from the outside, relay RO self-holds, pilot lamp I) L is lit, and the start circuit is sequentially activated through the b contact of relay R5. 21 is energized. In addition, an electromagnetic switch 22 of the belt conveyor 5, which is a conveyor to the next process.
Relay R6 is turned ON and OFF by the a contact point.

In other words, when belt conveyor 5 starts, relay R6 also turns OFF.
N, and when the belt conveyor 5 stops, the relay R6 also turns OFF.

In the above-mentioned sequential starting circuit 21, the belt conveyor 5 determines the distance between the lower portions of tanks IA and IB shown in FIG. tl, t7, t3
Then, time t has elapsed since the shutter 2A at the bottom of the tank IA and the transport device 3A were started.

(J later, shutter 2B at the bottom of tank IB.

The transport device 3B is activated. Similarly, Tsuyatsuta-2B
1 After starting the transport device 3B, the shutter 2G at the bottom of the tank IC and the transport device 3C are started with a delay of time t.
Furthermore, the shutter 2D at the bottom of the tank ID and the transport device 3D are activated after a delay of time t3.

Snap switches SSI, SS2) SS3 and SS4 are snap switches for selecting whether or not to discharge grain from tanks IA, IB, IC, ID, and only from tanks where these snap switches are ON. I try to drain the grains.

” 1. From the sequential startup circuit 21 to the snap switch SSI
~Through SS4, shutters 2A~2D.

Activate the transport equipment 3A to 3D. Relays R1, R2) R3
, R4 is energized. And a of relay R6
The point of contact has been reached. That is, relays R1, R2) R3, R
Of the 4 coils, only the relays whose snap switches are turned on are energized in sequence. In addition, if the energized relay is a bell) and the conveyor 5 starts up incorrectly, the relay R6 will be turned on and the a contact of relay R6 will be closed, but if the belt conveyor 5 stops, the relay R6 will be turned on.
is also turned OFF, and the a contact of relay R6 is opened to stop energizing the coils of relays R1, R2) R3, and R4, so that they are energized only when the belt conveyor 5 is activated.

In addition, the above snap switches SSI, SS2) SS3
, from SS4, tanks IA, IB, and IC.

Output contacts r, vi, LV2.1. of each level sensor 20 attached to the bottom of the ID. , V3, I, and V4, and are connected to the coil of relay R5 and buzzer BZ. ” - When the level sensor 20 detects grains, it turns ON, and the output contacts LVI, LV2) LV3, LV
4 is open, while it is OFF when no grain is detected, and output contacts LVI, LV2)■7V3, LV4 are closed. Therefore, among the circuits sequentially energized by the snap switches SS1 to SS4 from the starting circuit 2I,
The coil of relay R5 is energized by the circuit in which the level sensor 20 does not detect grains, that is, the output contacts LVI to LV4 are closed, and the buzzer BZ issues an alarm.

Relay R5 is self-holding and push button PB2 for stopping
Buzzer BZ will continue to sound unless the power is turned off by pressing . Moreover, since the b contact of relay R5 opens, the power supply to starting circuits 21 and below is sequentially stopped, and relays R (~R4 are turned OFF).
' becomes. That is, if any of the tanks IA to ID of the activated discharge device run out of grain, an alarm will be issued and the entire device will stop.

As described above, in the start/stop control circuit A, the sequential start circuit 21 controls the shutters 2A to 2D and the conveyance devices 3A to 3D according to the conveyance direction and conveyance speed of the belt conveyor 5, which is a conveyor to the next process. They are also activated sequentially, allowing for accurate grain mixing even at the beginning of discharge. In addition, if the belt conveyor 5 stops during discharge, if the conveyance devices 3A to 3D continue to discharge, the grains discharged to the belt conveyor 5 will overflow on the belt conveyor 5. It is stopped in conjunction with the belt conveyor 5, but since grains are already on the belt conveyor 5 when it is restarted, the shutters 2A~
2D and the transport devices 3A to 3D are not sequentially started, but restarted at the same time after they are stopped.

The configuration of the transport device control circuit B that controls the speed of the transport devices 3A to 3D is as shown in FIG. The voltage is divided to create a reference voltage, which is then input to the current amplification circuit 23. The current amplification circuit 23 amplifies and outputs only the current while keeping the voltage unchanged as the input voltage. And relay R1
, R2) Through the a contacts of R3 and R4, the variable resistor VRI
, VB2) VH2) VH2. The voltage output from the current amplification circuit 23 is applied to the relays R1, R2) and R3.
, when the a contact of R4 is closed, (J1 variable resistor VRI, VB2) VH2) is divided by VH2, and the transport devices 3A, 3B, and 3C, respectively.

Speed control circuit 2/IA, 24B, 24. for motors M1, M2) M3, M4 moving in 3D. C, 24-D. These motor speed control circuits 24A-24. D
is a circuit that varies the rotational speed of the motor using an inverter or Zyristor, etc., and generates rotation of the motor in proportion to the input voltage, and is connected to the motors M1-M4 of each of the transport devices 3A to 3D. Therefore, when the voltage applied to the motor speed control circuit 24A of the transport device 3A is increased by changing VRl based on an external instruction, the rotation of the motor M+ of the transport device 3A is increased. Conversely, from the outside, V
When RI is changed to lower the voltage applied to the motor speed control circuit 24A of the transport device 3A, the rotation of the motor M1 of the transport device 3A is reduced. VB2) By VR3 and VR4,
Similarly, transport devices 3B and 3C.

The rotational speed of 3D motors M2) M3 and M4 can be changed. In addition, variable resistor ■RO allows VRI to VR
Since the voltage applied to /1 can be changed, the variable resistor V
By changing RO, the transport speeds of the transport devices 3A to 3D can be adjusted while keeping the ratio of the transport speeds of the transport devices 3A to 3D constant.

The shutter control circuit C, which freely adjusts the degree of opening and closing of the shutters 2A to 2D, has the configuration shown in FIG. The voltage indicating the weight output from the scales 4A, 4rll, 4C, 4D (J1 voltage 1V and voltage -V
It is input into the differential amplifier 25 together with the reference voltage divided by R5. The differential amplifier 25 outputs to the non-inverting comparator 26 and the inverting comparator 27 a voltage that is the difference between the voltage representing the weight output from the weighing instruments 4Δ to 4D and the reference voltage. The non-inverting comparator 26 compares the voltage (1) and the voltage (-) with the voltage divided by the variable resistor VR6, and if the input voltage from the differential amplifier 25 is higher than that, the mil-switch 19 is closed. B contact and start command relay R1 or R2) R3
, motor drive circuit 29A or 29B through R4,
29C129D with shutter 2A or 2B, 2C,
21) A command current is applied to rotate the motor 6A or 613.6C16D in the direction of closing each opening/closing plate 12. Further, the inverting comparator 27 compares the voltage +V and the voltage -■ with the voltage divided by the variable resistor VR7, and if the input voltage from the differential amplifier 25 is lower than that, the mitswitch 1 is opened.
8 b contact and start command relay R1 or R2)R
3. Motor drive circuits 29A to 29 through the a contact of R4
Motor 6A ~ in the direction to open the shutter opening/closing plate 12 in D
A command current is applied to rotate 6D.

The motor drive circuits 29A to 29D are connected to the shutter 2A.
The direction of rotation of the shutter drive motors 6A to 6D is determined by the command current for opening or closing each of the shutter plates 12 to 2D, and the motors 6A to 6D are driven for a predetermined period of time. That is,
The start command relays R1 to R4 are turned ON, and the output signal of the measuring instruments 4A to 41) becomes the set voltage unless one of the closing mitswitches or the opening mitswitch I8 is pressed by the stopper 17 of the opening/closing plate I2. Shiny -2Δ~2D
The opening/closing plate 12 of the measuring instruments 4A to 4D will be moved.
A predetermined weight (the weight of the grain weight transport device) is always placed on the second part.

Next, the operation of this device will be explained.

First, in order to keep the weight of the grains on the transport devices 3A, 3B, 3C, and 3D constant, the reference voltage obtained by dividing the voltage 1 V and the voltage -V shown in Fig. 6 by the variable resistor VR5 is set. , for example, the weight of the transport device 3A and 10 kg of grains, and the weight of the transport device 3B
weight and grain] Okg, transport equipment 3C and grain 10kg,
It is set in advance so that the transport device 3D and grains weigh 10 kg.

Next, when the activation button FBI is pressed, the snap switch 5 is activated by the sequential activation circuit 21 of the activation/resistance control circuit A.
SI-9S4 is turned ON sequentially, drives motors 6A to 6D via shutter control circuit C, and drives motors M1 to M4 via transport equipment control circuit B, and moves to the position farthest from elevator 7. The shutter 2A at the bottom of the tank IA and the conveyor device 3A are activated, and the shutters at the bottom of the tank IB, the shutter 2B at the bottom of the conveyor device 3B, and the gloss at the bottom of the tank IC are activated in sequence according to the conveyance direction and conveyance speed of the belt conveyor 5. -20, Activate transport equipment 3C → shutter at the bottom of tank ID -2D, transport D 3, By starting this sequentially, the mixing ratio of grains discharged from each tank IA to ID can be adjusted from the start of discharge. This can be done as accurately as possible without making any changes. That is, all discharge devices (shutters 2A to 2D, transport devices 3A to 3D)
) start operating at the same time, when the grains discharged from the tank ID near the elevator 7 are conveyed by the belt conveyor 5 and arrive at the elevator 7, the grains discharged from the tank ID near the elevator 7 are transferred to the tank I farther from the elevator 7.
Since the grains discharged from A have not yet arrived, the grains are not mixed at that point. In order to achieve accurate mixing, the grain from the distant tank IA must be transferred to elevator 7.
It is necessary for the grains from the nearby tank ID to arrive when the tank ID arrives, so by performing the sequential startup as described above, accurate mixing can be achieved from the beginning.

If the belt conveyor 5 stops during the above-mentioned discharge operation, the grain discharge device (shutter 2A
~2D and conveying equipment 3Δ~3D) are also stopped at the same time, thereby preventing grains from overflowing on the belt conveyor 5. however,
Since the grains that are being mixed accurately are already on the belt conveyor 5, when the belt conveyor 5 is restarted, the grains 2A to 2D and the conveying equipment 3A to
The 3Ds are not restarted sequentially, but are restarted simultaneously.

Also, during the discharge operation, tank IA or IB, IC,
When any of the grains in the ID runs out, it becomes impossible to mix the grains accurately, but in this device, the level sensor 20 works to prevent all the devices ( The shutters 2A to 2D and the transport devices 3A to 3D) stop, and a buzzer alarm is issued to notify the end of discharge.

When changing the mixing ratio of grains discharged from each tank IA to ID, VRl, VH2)V of the conveyance equipment control circuit B
H2) Operate VH2 and transport equipment 3A, 3B, 3C
, 3D transport speed to the required ratio Va:Vb:Vc:Vd
When set to , transport equipment 3A.

The weight ratio of grains discharged in 3B, 3C, and 3D can be set to a required ratio Va:Vb:Vc:Vd.

In addition, when changing the amount of grains to be mixed, the speed ratio of the conveying devices 3A, 3B, 3C, and 3D is set to VRO by changing the VRO.
a: Vb: Vc: By changing the conveying speed while keeping Vd, the conveying devices 3A and 3B.

3C13D The weight ratio of grains discharged is va.

The mixing amount can be adjusted while maintaining Vb:Vc:Vd.

Note that the present invention is not limited to the above-mentioned embodiments, and instead of the shutter, a conveyor such as a vibrating conveyor, a belt conveyor, or a screw conveyor is used, and instead of controlling the opening and closing of the shutter, the conveyance speed of these conveyors is adjusted. It is also possible to perform control such that grains of a predetermined weight are always placed on the transport devices 3A to 3D. In that case, the output of the differential amplifier shown in Figure 6 should be used as an inverting/non-inverting comparator instead
Through a non-inverting amplifier, the motor speed control circuit of FIG. 5 controls the rotational speed of the motor of a conveying machine such as a vibrating conveyor, belt conveyor, screw conveyor, etc.

Effects of the Invention As is clear from the above explanation, the grain mixing device according to the present invention can accurately discharge and mix grains at a predetermined weight ratio from a plurality of tanks storing different types of grains. You can. In addition, by starting up in sequence at the start of discharging, it is possible to supply the elevator in the next process in a mixed state from the beginning, and when the grains in either tank run out during mixing operation, it is automatically started. Since the actuator is stopped, grains can always be accurately mixed and fed to the next process. Further, the mixing ratio can be easily adjusted, and the feeding rate of the mixed grains can also be easily adjusted by adjusting the conveying speed. Furthermore, if the belt conveyor that mixes grains and transports them to the elevator stops, the operating equipment immediately stops, which prevents grains from overflowing on the belt conveyor. When the belt conveyor is restarted, the discharge devices are restarted at the same time rather than sequentially, so that efficient discharge and mixing can be performed.

In addition, the measuring device installed at the bottom of each tank's shutter is different from conventional measuring devices, so to speak.
Since it is a scale, it has various advantages such as not being expensive and being able to be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is an overall view of the device according to the present invention, Fig. 2 is a schematic diagram showing the relationship between the control circuit and each discharge device consisting of the tank, shutter, conveyance equipment, and measuring device of the above device, and Fig. 3
The figure shows the structure of a part of the shutter.I) is a plan view (II)
4 is a circuit diagram of the start/stop control circuit A, FIG. 5 is a circuit diagram of the transport equipment control circuit B, and FIG. 6 is a circuit diagram of the shutter control circuit C. +A, IB, Ic, iD...tank 2A, 2B, 2C, 2D... gloss soter 3A, 3B,
3C, 3D... Transport equipment 4A, 4B, 4C, 4D...
-Measuring device 5...Belt conveyor 6 (6A6B6C6D)...Motor 7...Elevator I2...Opening/closing plate 18...Opening limit switch 19...Closing limit switch 20...Level sensor A...Start/stop control circuit B ...Conveyance equipment control circuit C...Shutter control circuit

Claims (5)

[Claims] (1) A shutter is provided at the bottom outlet of multiple parallel grain storage tanks, each of which is operated by an electric device to freely adjust the degree of opening and closing. In addition to providing each conveying device with a variable speed, a measuring device capable of simultaneously weighing each of the conveying devices and the grains being conveyed by the conveying device is provided, and a measuring device is provided that is perpendicular to the downstream ends of these parallel conveying devices. A conveying machine such as a belt conveyor is arranged in the conveyor, and the grains discharged from each of the above-mentioned conveying devices are conveyed while being mixed to the next process, and the weight detected by each of the above-mentioned weighing instruments is a shutter control circuit that adjusts the opening/closing degree by operating an electric device of the shutter by comparing the set weight with a set weight; A starting/stopping control circuit for starting/stopping the transporting equipment, the shutter, and the transporting machine for the next process via the transporting equipment control circuit and the shutter control circuit according to the starting/stopping operation of the grain grain. Grain mixing equipment. (2) The apparatus according to claim (1) is characterized in that when the conveyance machine for the next process is stopped, the operation of all the shutters and conveyance equipment is stopped in conjunction with the above-mentioned conveyance machine for the next process. Grain mixing equipment. (3) In the device according to claim (1), a sensor for detecting the presence or absence of grain is provided at the outlet of each of the grain storage tanks, and the sensor detects the absence of grain. When this occurs, the detection signal is input to the start/stop control circuit, and the start/stop control circuit stops the operation of all the shutters and conveyance equipment, and also issues an alarm. grain mixing equipment. (4) The apparatus according to claim (1) is characterized in that the transport speed can be adjusted by an external instruction while maintaining a constant transport speed ratio of each transport device. Grain mixing equipment. (5) In the apparatus according to claim (1), when starting to discharge grains from the tank, the timing for discharging the grains from the conveying device at the bottom of each tank to the conveying machine for the next process is determined by Perform sequentially according to the conveyance speed and direction of the machine,
A grain mixing device characterized in that the grain mixing device is configured such that the grains from each tank reach the next process simultaneously by the conveyor.