JPS62111828A - Residual grain discharging device of grain tank - Google Patents

Abstract

PURPOSE:To completely discharge residual grins and prevent subsequently entered grains from being mixed with residual grains by providing a cylinder operation control circuit which once closes a discharge gate then opens the discharge gate and again closes it. CONSTITUTION:When the rice in a rice tank 3B is gradually decreased and a no-grain signal is output from a level sensor 1, a direction to close a gate 8 is sent from a central processing unit after a preset time in a memory unit has elapsed, and the piston of a cylinder 9 is extended to close the gate 8. Residual rice falls down from the inner wall of the rice tank 3B to its lower end section due to the vibration or small shock resulting from the closure. Next, the piston of the cylinder 9 is shrunk by a direction from the central processing unit to open the discharge gate 8, and the residual rice which has fallen down is completely discharged onto a belt conveyor 12 through a discharge port 5. Then, the discharge gate 8 is fully closed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to grain tanks, and more particularly to a residual grain discharge device for grain tanks.

Conventional technology Grain tanks installed in grain communal drying and preparation facilities (country elevators, rice centers, etc.) or rice milling factories, etc., have a) a grain supply port at the top and a discharge port at the bottom ( (2) A gate operated by a cylinder or the like is provided at the supply port and the discharge port, and (3) A sensor is installed at an appropriate position to confirm the full amount of grain in the grain tank and the discharge status. The opening/closing operation of each gate is controlled by the signal from the sensor.

Problem to be Solved by the Invention By the way, when the cylinder closes the discharge gate to discharge and cover the grain in the grain tank, the funnel wall 1 of the grain tank
Grains often remain near the boundary B between -1 and the vertical wall V (see Figure 3). This is because while the grains are loaded into the tank and discharged, dust that gets mixed in between the grains or bran that remains on the surface of the grain particles adheres to the inside of the tank, causing leakage from the 1-1 wall. The flow is obstructed, and the water stays in a swamp, especially near the bend in Boundary B. As a result, the grain remained in the grain tank and was fed through the feed port, causing various inconveniences in terms of quantity control and quality control in rice milling factories, etc. .

The technical problem of the present invention is to provide a device for discharging residual grains from a grain tank that does not generate residual grains in the grain tank when discharging the grains.

Means for Solving the Problems and Functions In order to solve the above-mentioned problems, the present invention has a supply port at the upper end, a discharge gate for opening and closing the discharge port and the υl outlet, and a cylinder for operating the discharge gate at the bottom end. In each grain tank, a level sensor is installed near the discharge port to detect the presence or absence of grain. When discharging grain from the grain tank, the level sensor detects that there is no grain and the discharge gate is closed once. A cylinder operation control circuit is provided, and the control circuit and the level sensor are connected so that the discharge gate is opened again after the discharge gate is closed.

As a result, when discharging the grain in the grain tank, when the "No grain J" signal detected by the level sensor is input to the cylinder operation control circuit, the cylinder operates and closes the discharge gate. At this time, residual grains adhering to the inner wall of the tank collapse to the bottom of the tank due to vibrations when the discharge gate is closed, but the cylinder is contracted by a command from the cylinder's operation control circuit, and the discharge gate opens and the remaining grains are removed. As the grain is discharged from the discharge port, the cylinder is extended again and the discharge gate is closed.

Example A preferred embodiment of the invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a bucket 1 to an elevator 12, which is a screw conveyor connected to and placed on the side of a packet elevator 1. 3 is a grain tank, for example, a polished rice tank, with a supply port 4 at the top and a discharge port 5 at the bottom. 6 is a supply gate that is slidably provided between the screw conveyor 2 and the supply port 4, and 7 is a cylinder that operates the supply gate 6. Reference numeral 8 indicates a discharge gate that is slidably provided above the discharge port 5, and 9 indicates a cylinder that operates the discharge gate 8. 10.11 is a level sensor for detecting the full and empty state of grain in the grain tank; for example, a light sensor equipped with a light emitting/receiving element is used. 12 is a conveyor from the bell 1 that conveys grains discharged from the discharge port 5; 13 is a conveyor 12 to the bell 1;
Packet elevator-11 installed vertically connected to the discharge side of
4 is a scale packaging machine.

The second is a block diagram for controlling the operation of the discharge gate 8 in this embodiment. 15 input/output interface, 1
6 is a central processing unit (CPU), and 17 is a storage device consisting of ROM and RAM. 18 is a relay that switches two electromagnetic valves 19; 19 is an electromagnetic valve that operates when air is injected into the cylinder 9; there is a valve for extending the piston and a valve for contracting the piston. 20 is a reed switch operated by a magnet fixed to the screws 1 to 1 of the cylinder 9.

Next, the operation of the above embodiment will be explained.

The polished rice conveyed from the rice milling machine or the like in the previous process is conveyed to the bucket 1 via the elevator 1 to the screw conveyor 2. Now, when you want to pour white rice into any white rice tank, for example 3B, use the control panel (not shown) to contract the cylinder 7 above the supply port 4 of the white rice tank 3B and open the supply gate 6. The polished rice conveyed by the screw conveyor 2 is put into the polished rice tank 3B.

When the amount of white rice in the white rice tank 3B gradually increases and the level sensor 10 detects that there is one grain, the piston of the cylinder 61 is extended and the supply gate 〇 is closed, and the filling of white rice is completed.

When packaging and shipping the white rice in the white rice tank 3B, move the comparator 17-12 to bell 1 and the bucket 1 to lower elevator-1.
3 is driven U1 white rice tank 3B discharge button switch (
Illustration 1! ``?I'') is turned on.

The cylinder 9 is contracted and the cylinder 8 opens to the discharge goo 11.
The white rice is flowed out to the bell 1 to the comparator j7-12-L, and is supplied to the quick-packing machine via the packet elevator-13,
Sequentially old! It is packaged in 71 pieces.

When the amount of white rice in the white rice tank gradually decreases and the level sensor 11 detects that there is no grain (see Figure 2), the central processing unit 16 sends a signal to the gate 8 after a preset period of time, for example 60 seconds, in the storage device 17. An order is issued to close it.

In other words, the command is sent to the input/output interface 15.
: When input to the relay 18 via the output buffer,
The relay 18 turns on the solenoid valve 15) that causes the piston of the cylinder 9 to extend, and the air source (not shown) is connected to the workpiece 1.
7- is injected, the cylinder 9 is activated, and the gate 8 is closed.

When the gate 8 is closed, the central processing unit 16 further outputs a command to open the gate 8, the relay 18 is switched, the solenoid valve that contracts the piston of the cylinder 9 is ONL, and the discharge gate 8 is closed. . When the discharge gate 8 is opened, a command to close the tel output gate 8 is outputted again from the central processing unit 16, the relay 18 is switched, the cylinder 9 is extended, and the discharge gate 8 is closed.

In other words, after a certain period of time has elapsed since the level sensor 11 outputs a signal indicating "1 grain missing", the discharge gate 8 performs the operation of closing → opening → closing. This series of operations is recognized by a signal from a reed switch 20 provided on the cylinder 9, and is measured by a counter in the central processing unit 16.

Regarding the white rice in the white rice tank 3B, during a certain period of time after a signal is output from the level sensor 11,
The remaining white rice below the level sensor 11 is discharged. However, as described above, residual grains of rice often occur near the boundary with the vertical wall, such as leakage≧1−wall of the polished rice tank 313. This remaining grain rice easily collapses onto the lower end of the polished rice tank 3B due to the vibration or small impact when the exit gate 11-11 closes. When the discharge gate 8 opens, all of the polished rice at the lower end of the polished rice tank 3B is discharged from the discharge port 5 onto the bell 1 to the conveyor 12.

FIG. 3 shows another embodiment of the invention.

21 is a] --shaped rotating arm, 22 is a striking method fixed to one end of the rotating arm 21, 23 is a fulcrum part that allows the rotating arm 21 to be rotatably attached to the leakage 1 wall 1-1 of the grain tank, and 24 is a It is a contact plate fixed to the funnel wall H, and the contact plate 24 is used for the beating method 22.
is provided at a position where it rotates and comes into contact with the funnel wall H. 25
is an engagement plate provided at the end of the discharge gate 8, and the engagement plate is provided with a long hole. The pin 21P at the end of the rotating arm 21 is inserted into the elongated hole and engaged.

The operation of this embodiment will be described.

The operation of the discharge gate 8 is the same as that in the first embodiment, so a description thereof will be omitted.

When screws 1 to 9 of cylinder 9 are extended, discharge gate 8
slides and the opening 8A moves, and the engagement between the engagement plate 25 and the bin 2IP causes the rotation arm 21 to move to the fulcrum portion 2.
Rotating around 3, striking method 22 is lifted upwards,
In the figure, the contact plate 24 is struck as shown by the two-dot chain line. In this way, by hitting the contact plate 24 with the hitting method 22, a strong impact is applied to the peripheral wall of the grain tank 3, and the remaining grain R collapses onto the lower end of the grain tank 3. The fallen grains are discharged from the discharge port 5 when the discharge gate 8 is opened, as in the first embodiment.

Note that when the discharge gate 8 is closed again, the plate 24 is struck by the striking method 22, but at this time, all the remaining grains have already been discharged, so that the grains that are subsequently thrown in and the remaining grains do not mix. There is no.

In this way, the rotating arm is attached to the wall of the grain tank.

If a shock generating device such as a blowing method is installed to apply a shock to the grain tank in conjunction with the closing operation of the discharge gate, make sure that the remaining grain does not fall easily due to condensation on the inner wall of the grain tank. Even Natogi can reliably remove all residual grains one by one.

Effects of the Invention As described above, when the present invention is discharging grain from a grain tank, when the level sensor detects that there is no grain, the cylinder is operated by the cylinder operation control circuit to close the discharge gate, and the cylinder is further closed. was formed so that it contracted and formed the 1-1 exit gate, and then closed the discharge gate again, so it collapsed from the inner wall of the tank due to the vibration or shock (small impact) when the discharge gate closed for the first time. The residual grains can be completely discharged, and the subsequently input grains do not mix with the residual grains, allowing correct counting control and quality control when blending grains, etc.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a cylinder operation control block diagram, and FIG. 3 is a partially enlarged front sectional view of another embodiment. 1... Packet elevator-12... Screw conveyor, 3... Grain tank, 4... Supply port, 5...
...Next exit, 6... Supply gate. 7...Cylinder, 8...Discharge gate. 9... cylinder, 10,1
DESCRIPTION OF SYMBOLS 1...Level sensor, 12...Belt conveyor, 13...Packet elevator-114...Weighing and packaging machine, 15...Input/output saw interface, 161.
...Central processing unit, 17...Storage device, 18...Relay, 19...Electric valve, 20...Reed switch.

Claims (2)

[Claims] (1) The upper part has a supply port, the lower end has a discharge port, a discharge gate that opens and closes the discharge port, and a cylinder that operates the discharge gate, and a level sensor that detects the presence or absence of grain near the discharge port. In the provided grain tank, when discharging the grain in the grain tank, the level sensor detects that there is no grain and the discharge gate is temporarily closed, and then the discharge gate is further opened and the closing operation is performed again. ,
A residual grain discharge device for a grain tank, characterized in that a cylinder operation control circuit is provided and the control circuit is connected to the level sensor. (2) The surrounding wall of the grain tank is equipped with an impact generating device consisting of an arm that rotates toward the grain tank wall in conjunction with the closing operation of the discharge gate, and a striking ball provided at the end of the arm. A residual grain discharge device for a grain tank according to claim (1).