JPH0141575B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a grain discharge device.

Conventional technology Conventionally, there has been a hopper quantitative discharge device in which a variable discharge amount type discharge machine is provided at the bottom of a scale hopper, and the discharge amount from the scale hopper by the discharge machine is controlled by a weight detection means that electrically detects the weight of the material. It has been proposed as Japanese Patent Application Laid-Open No. 55-52829.

Problems to be Solved by the Invention However, in the device described in JP-A No. 55-52829, the weight detection means electrically detects the weight of the material in the scale hopper, and quantitatively determines the required discharge amount per unit time. A target function generator generates a time function of an electric signal corresponding to the expected material reduction curve in the scale hopper when discharging the material in the scale hopper, and the material in the scale hopper is electrically detected by the weight detection means. The signal corresponding to the weight is subtracted from the target function generated by the target function generator, and the discharge machine is driven by the subtracted value to enable quantitative discharge of the material.The weight detection means is installed inside the scale hopper. Since the weight of the material in the scale hopper is detected, the weight detection means is large-sized, and the weight of the material in the scale hopper must be constantly detected by the weight detection means.

It is an object of the present invention to address the above-mentioned problems and to
Grain in the grain discharge flow path is taken into the volumetric weight measuring machine from the grain intake port in the middle of the flow path and carried into the weighing container, and the weighing machine measures the weight of the predetermined volume of grain stored in the weighing container. By doing so, the weighing machine is made as small as possible, and if the grain in the weighing container does not reach a predetermined capacity, the weighing machine is not activated by the central processing unit, and the weighing machine calculates the weight of the grain in the weighing container. There is no need to constantly measure the grain by the volumetric weight measuring machine, and when the volumetric weight of the grain carried into the weighing container from the grain inlet changes, the central processing unit measures the predetermined volume of grain obtained by the volumetric weight measuring machine. The number of revolutions per unit time of the drive device of the discharge valve is controlled according to the measurement result of the volumetric weight of the grain discharge channel, and the grains in the grain discharge channel are discharged by the discharge valve at a preset discharge weight per unit time. Even if the volumetric weight of a predetermined volume of grain as determined by the volumetric weight measuring device changes, the central processing unit controls the number of revolutions per unit time of the drive device so that the volume of grain discharged from the discharge valve is appropriate; It is an object of the present invention to provide a grain discharge device capable of keeping the amount of grain discharged from a discharge valve uniform at a desired discharge weight per unit time.

Means for Solving the Problems The grain discharging device of the present invention includes a discharge valve that is disposed on the downstream side of a grain discharge passage from a grain tank and that receives grain from the grain discharge passage and discharges it at another position by continuously rotating the discharge valve. A part of the grain conveyed to the discharge valve is taken in from a grain inlet provided in the middle of the grain discharge flow path to the discharge valve at regular intervals, and its volumetric weight is calculated. A volumetric weight measuring machine is provided, and the volumetric weight measuring machine includes a weighing container for storing a predetermined amount of grain from the grain intake port therein, and a meter for measuring the weight of a predetermined volume of grain in the weighing container. heavy equipment, and a driving device for the discharge valve and the weighing machine, when the weighing machine measures the weight of a predetermined volume of grain in the weighing container, the number of rotations per unit time of the driving device is determined. The central processing units control each unit, and the central processing unit determines whether the amount of grain discharged from the discharge valve is equal to the preset discharge per unit time based on the measurement result of the volumetric weight of the grains by the volumetric weight measuring machine. It has a configuration characterized in that the driving device is controlled so that the weight is controlled.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In Figure 1, 1 is a grain tank (not shown)
On the downstream side of the grain discharge passage 1, a discharge valve 2 of a variable discharge capacity type consisting of a rotary valve or the like is rotatably provided. A plurality of grain conveying sections for receiving grains are provided with openings in the vertical direction, and a pulse motor M serving as a drive device is connected to the rotation shaft of the discharge valve 2, and the discharge valve 2 is rotated by the pulse motor M. The grains received in the grain conveying section facing the grain discharge flow path 1 are discharged at another position.

A grain intake port 11 is opened in the middle of the inclined wall of the grain discharge channel 1, and a portion of the grains to be transported to the discharge valve 2 is provided below the grain intake port 11 of the grain discharge channel 1. A volumetric weight measuring machine 3 for taking in grains and measuring their volumetric weight is provided, and the grain intake port 11 of the grain discharge channel 1 is connected to the volumetric weight measuring machine 3 via a chute.

A weighing container 5 for storing a predetermined amount of grain from a grain intake port 11 via a feeder 9 is disposed inside the volumetric weight measuring device 3, and a level meter 10 is provided above the inside of the weighing container 5. The weighing container 5 is provided with a load cell 4 serving as a weighing device for measuring the weight of a predetermined amount of grain in the weighing container 5, and a grain discharge valve 7 is provided at the bottom of the weighing container 5, which opens downward, so as to be openable and closable. A solenoid 6 is connected to the grain discharge valve 7, and the grain discharge valve 7 is opened and closed by the solenoid 6.

A vibrator 8 is provided at the bottom of the feeder 9 above the inside of the volumetric weight measuring machine 3, and the chute of the grain intake port 11 is connected above one end of the feeder 9, and the top of the other end of the feeder 9 is connected to a weighing container. The vibrator 8 vibrates the feeder 9 and feeds the grains into the weighing container 5.

As shown in FIG. 2, the pulse motor M, the level meter 10, the load cell 4, the solenoid 6, and the vibrator 8 actuate the load cell 4 before the grains in the weighing container 5 reach a predetermined capacity, and also operate the volumetric weight measuring machine. a central processing unit ( 12 (hereinafter referred to as CPU),
The CPU 12 includes a printer 13 and a display tube (hereinafter referred to as
14 (referred to as a CRT) and a keyboard 15 are connected to each other.

The CPU 12 controls the pulse motor M so that the weight of grain discharged from the discharge valve 2 per unit time becomes a preset value, regardless of the magnitude of the measurement result of the volumetric weight of a predetermined capacity of grain by the volumetric weight measuring device 3. In other words, when the volumetric weight of a predetermined volume of grain measured by the volumetric weight measuring device 3 increases, the pulse motor M is adjusted per unit time so that the volume of grain discharged from the discharge valve 2 decreases. The rotation speed of the pulse motor M is controlled by the CPU 12, and when the volumetric weight of a predetermined volume of grain measured by the volumetric weight measuring device 3 changes to become smaller, the pulse motor M is controlled so that the volume of grain discharged from the discharge valve 2 increases. The rotation speed per unit time is controlled by the CPU 12, and the amount of grain discharged from the discharge valve 2 is maintained at a desired discharge weight per unit time.

Next, the operation of the embodiment of the present invention will be explained with reference to the operational flow shown in FIG.

First, turn on the system switch, then use the keyboard 15 to set the date and grain discharge weight per unit time, that is, the weight flow rate. Then, when you turn on the start switch, power is supplied to the volumetric weight measuring machine 3. , CPU 12 uses timer T ₁
At the same time, the vibrator 8 is activated.
The vibrator 8 vibrates the feeder 9, and a part of the grain in the grain discharge channel 1 from the grain tank is transferred to the discharge valve 2 from the grain intake port 11 of the grain discharge channel 1 through the chute, and the volumetric weight is increased. The grains are taken into the measuring machine 3 and transported into the weighing container 5 as the feeder 9 is vibrated by the vibrator 8 .

Next, when the grain capacity in the weighing container 5 reaches a specified value, the level meter 10 located above the inside of the weighing container 5 detects the grain, and the CPU 12 stops the operation of the vibrator 8 and operates the load cell 4. The weight of the grain in the weighing container 5, that is, the volumetric weight, is measured, and the measurement result of the load cell 4 is sent to the CPU 1.
2, and then CPU 12 sends solenoid 6
is operated for a certain period of time, the grain discharge valve 7 that closes the bottom of the weighing container 5 is opened, and the grains in the weighing container 5 are discharged.

Next, when the stop switch on the keyboard 15 is pressed, in the event of an accident, or when a request for a subsequent stroke is made, a stop signal is input,
The volumetric weight measuring device 3 is turned off, but if this stop signal is not input, it waits until the timer _T1 reaches the set value (for example, 4 minutes).

When the timer T ₁ reaches the set value, the CPU 12
sets the timer T ₁ and operates the vibrator 8, which vibrates the feeder 9 and transfers a portion of the grain in the grain discharge passage 1 from the grain tank to the discharge valve 2 into the grain discharge stream. The grains are taken into the volumetric weight measuring machine 3 through the chute from the grain inlet 11 of the passage 1, and are carried into the weighing container 5 as the feeder 9 is vibrated by the vibrator 8.

Thereafter, the same processing as the previous time is continued until a stop signal is received.

Then, the load cell 4 measures the volumetric weight of the grain for each cycle, and the measurement result of the load cell 4 is
The data is sent to the CPU 12, and the number of rotations per unit time of the pulse motor M is calculated.

That is, the weight flow rate per unit time set from the keyboard 15 is WKg/sec, the discharge amount per rotation of the pulse motor M discharged from the discharge valve 2 is ^vm3 , and the volumetric weight measured by the load cell 4 is w.
Kg/m ³ , the rotation speed n of the pulse motor M per unit time is obtained as n=W/v·w (1), and the rotation speed n of the pulse motor M is set thereby.

Furthermore, these data are stored in the storage device and displayed on the CRT 14 as necessary.

Then, it is determined whether the rotation speed setting of the pulse motor M obtained by calculating the rotation speed using equation (1) is the first time the start switch is turned on, and if it is the first time, the system waits for the startup of each device in the subsequent process. The timer _T2 is activated, and after a short delay, the pulse motor M is activated, and the pulse motor M is continuously rotated at the set rotation speed.

For the second and subsequent rotation speed settings, the volumetric weight is measured by the load cell 4, and as soon as the rotation speed is calculated, the rotation speed per unit time of the pulse motor M is changed to the calculated value.

In this way, the number of rotations per unit time of the pulse motor M can be controlled even if the volumetric weight of the grain changes,
The weight of grains flowing out from the discharge valve 2 per unit time is kept uniform at a set value.

Next, when the stop switch on the keyboard 15 is turned on to end this process, or when a request to stop the process from the subsequent process is made due to an accident (such as when the tank of the subsequent process is full), a stop signal is activated. When is input, the pulse motor M is stopped, and the volumetric weight measuring device 3 is also turned off as described above. Thereafter, data processing is performed and the data is printed out to the printer 13.

Also, the next weight flow rate setting can be made.

Figure 4 shows how multiple grain discharge devices of the present invention can be combined into one
It is controlled by a CPU, and multiple grain discharge device bodies A, B, and C are installed, and each of the grain discharge device bodies A, B, and C is controlled by an on-site operation panel.
A', B', C' are connected to the data central control board 20, and the data central control board 20 is connected to one
A printer 13, a CRT 14, and a keyboard 15 are connected to the CPU 12, respectively.

Especially when mixing multiple varieties of grains,
From the keyboard 15, each grain discharge device main body A, B,
Since the grain discharge weight per unit time is set from C, it is only necessary to input it from the keyboard 15 in accordance with the mixing ratio instead of the weight flow rate setting of A in FIG. If device body A is set to 1, grain discharge device body B is set to 2, and grain discharge device body C is set to 3, WKg/sec from grain discharge device body A and 2W from grain discharge device body B.
Kg/sec, 3WKg/sec from grain discharge device main body C
If the grains of each variety are discharged and mixed by stirring, grains having the above-mentioned weight mixing ratio can be obtained.

Effects of the Invention As described above, according to the grain discharge device of the present invention, the grains in the grain discharge channel are taken into the volumetric weight measuring machine from the grain intake port in the middle of the flow path, and are transferred into the weighing container. Since the weighing machine measures the weight of a predetermined amount of grain stored in the weighing container after being carried in, the weighing machine can be made as small as possible.

Furthermore, unless the grain in the measuring container reaches a predetermined capacity, the weighing machine is not activated by the central processing unit, so there is no need to constantly measure the weight of the grain in the weighing container with the weighing machine. When the volumetric weight of the grain carried into the weighing container from the grain intake port changes, the central processing unit controls the discharge valve according to the measurement result of the volumetric weight of a predetermined volume of grain obtained by the volumetric weight measuring machine. Since the rotation speed per unit time of the drive device is controlled, the grains in the grain discharge channel can be discharged at the desired discharge weight per unit time by the discharge valve, and the amount of grain discharged from the discharge valve can be controlled. can be maintained uniformly at the desired discharge weight per unit time.

It should be noted that if a plurality of grain discharge devices are controlled by one central processing unit, it becomes possible to mix grains of each variety in weight ratio, which is very convenient.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the main part of a grain discharging device according to an embodiment of the present invention, FIG. 2 is a control block diagram of the same as the above, FIG. 3 is a diagram of the operation flow of the same as the above, and FIG. FIG. 2 is a block diagram showing an example of use in which a plurality of grain discharge devices of the invention are controlled by one central processing unit. 1...Grain discharge channel, 2...Discharge valve, 3...
...Volume weight measuring device, 4...Load cell, 5...Measuring container, 6...Solenoid, 7...Grain discharge valve, 8
... Vibrator, 9 ... Feeder, 10 ... Level meter, 11 ... Grain inlet, 12 ... Central processing unit, 13 ... Printer, 14 ... Display tube, 1
5...Keyboard, 20...Data central control panel,
A, B, C...Grain discharge device main body, A', B',
C′...Field operation panel, M...Pulse motor.

Claims (1)

[Claims] 1 On the downstream side of the grain discharge channel from the grain tank,
A discharge valve for receiving grain from the grain discharge channel and discharging it at another position is provided in communication with a drive device so as to continuously rotate, and the A volumetric weight measuring machine is provided which takes in a portion of the grains conveyed to the discharge valve at regular intervals and measures its volumetric weight, and the volumetric weight measuring machine has inside thereof the grains from the grain intake port. A weighing container for storing a predetermined volume of grain, and a weighing machine for measuring the weight of a predetermined volume of grain in the weighing container are provided, and the driving device for the discharge valve and the weighing machine are connected to When the weight of each volume of grain is measured, the central processing unit that controls the number of revolutions per unit time of the drive device is contacted, and the central processing unit receives the measurement result of the volumetric weight of the grain by the volumetric weight measuring machine. The grain discharge device is characterized in that the drive device is controlled so that the amount of grain discharged from the discharge valve becomes a preset discharge weight per unit time.