JPS61105452A - Hopper scale of country elevator, rice center or the like - Google Patents

Abstract

PURPOSE:To measure accurately the water content of grains for specific weight by providing a measuring hopper, etc., under a throw-in chute which has a gate connected to a gate opening and closing device. CONSTITUTION:A discharge magnet 24 is turned on to close a discharge gate 19 of the measuring hopper 18, and a throw-in magnet 4 and an air cylinder 5 operate to open gates 3 and 3' at the lower end of the throw-in chute 2, so that grains in the chute 2 flow down from a discharge port to between electrode plates 18 and 18 of the hopper and stored. Further, when the grains in the chute 2 attain to specific weight, a sampler 21 operates with the output signal of a quantitative limit switch 14, the electric capacity of the grains is measured by an electric capacity meter 20, whose capacity value is sampled by the sampler 21 and held in a holding circuit 22; and its output is converted by an indicator 23 into water content, which is displayed. Then, the gate 19 is opened to discharge grains in the hopper 8 to the chute 12 to specific weight and they are introduced in a temporary storage tank, etc., while classified by water content. Then, a series operations for the measurement of the water content are repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to hopper scales such as country elevators and rice centers.

2. Description of the Related Art Conventionally, a water content measuring device equipped with an electric plate facing inside a measuring tank has been known as Publication No. 12900/1983. In order to accurately measure the moisture content by keeping the water constant, an electrode plate is installed at the bottom of the weighing tank. Since surface moisture is measured as electrical resistance, even if the electrical resistance measurement method is used to measure the moisture content of grains with large changes in bulk density, the surface and internal moisture of grains in the upper part of the hopper with low compaction density cannot be measured. There was a large margin of error in the measurement.

In addition, a device for measuring the moisture content of grain samples was published in US Patent No. 37.
This is known as Specification 4 of No. 94911, but this method measures the moisture content of FF grain samples taken from the received grain, and does not measure the moisture content of the entire received grain. The switch is actuated when the amount of grains added reaches a predetermined level using the spring and its displacement, so the drop impact load when the grains are introduced affects the displacement of the spring, causing the switch to actuate. There was a risk that the product would not operate properly. Furthermore, since the capacitance was measured in an unstable filling state during the charging process, sufficient moisture measurement accuracy could not be expected.

Problems to be Solved by the Invention It is an object of the present invention to address the above-mentioned drawbacks and to make it possible to accurately measure the moisture content of grains with respect to a predetermined heavy water content, and to accurately weigh grains of a predetermined weight. A country elevator that makes it possible to measure the moisture content of the entire received grain, which has a wide variation in moisture content.

Our goal is to provide hopper scales for rice centers, etc.

Means for Solving the Problems The hopper scale for country elevators, rice centers, etc. of the present invention is provided with a weighing hopper below a charging chute having a gate connected to a gate opening/closing device, and the weighing hopper is connected to an lff1 meter. and a weight signal generator is provided in the weighing scale, and a pair of electrodes are provided in the weighing hopper,
This electrode is connected to a display device via a capacitance meter, a sampler, and a holding device, and the weight signal generator is connected to the sampler, the gate opening/closing device of the input chute, and the discharge gate opening/closing device of the weighing hopper. When the weight reaches a predetermined value, the gate opening/closing device of the loading chute is operated to close.
This configuration is characterized in that the output of the capacitance meter is taken out by the sampler, and then the discharge gate opening/closing device of the needle groove hopper is communicated to open and operate.

Operation Grain is charged into a weighing hopper provided below the charging chute, and the hanging part of the stored grain is set in advance in a weighing scale connected to the weighing hopper. When the predetermined weight is reached, a rod B provided on the weighing scale is activated.
A signal generator sends an output signal to close a gate opening/closing device connected to a gate of a charging chute to stop the charging of grain from said charging jute to a weighing hopper, and a capacitance meter connected to said electrode. The capacitance value of a predetermined weight of grain stored on the electrode surface was taken out to a sampler, this capacitance value was held by a holding device connected to the sampler, and this measured value was communicated to the holding device. After converting and displaying the moisture content on the display device, the output signal of the weight signal generator operates the discharge gate opening/closing device of the weighing hopper to discharge the grains in the weighing hopper and produce a predetermined weight. Measure the moisture content of the whole grain.

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

In the figure, 1 is an electrically operated hopper scale that is installed in equipment such as country elevators and rice centers. A discharge port is formed at the lower end of the input chute 2, and a double gate 3.3' is attached to the discharge port so as to be openable and closable.
By opening and closing the gate 3.3', the grain is discharged and the discharge is stopped, and the aii of 1RI11t of the gate 3.3' is
The amount of grain discharged is controlled by

In addition, a charging magnet 4 serving as a gate opening/closing device is connected to the outer gate 3 via a link l14%. A gate opening/closing device consisting of an F-cylinder 5 is connected to the inner gate 3', and the opening/closing operation of the gate 3°3' is performed by the charging magnet 4 and the air cylinder 5. Reference numeral 6 denotes a stirring device provided in the input chute 2 to prevent clogging when the grains in the input chute 2 are discharged from the discharge port via the gate 3.3'.

The above-mentioned charging magnet 4 and stirring'@M6 are connected to the electric operation panel 7.
electrically connected to.

8 is a weighing hopper provided below the gate 3.3' at the lower end of the input chute 2; the weighing hopper 8 is suspended on one side of a balance 9, which is a type of weighing scale; A setting weight 10 corresponding to the setting me is hung, and the longitudinal center of the balance 9 is swingably supported by a support.

The weighing hopper 8 is disposed inside a case 11, and is covered on the outside by the case 11 so as not to come into contact with the operating parts of the balance 9. A chute 12 is connected to the lower part of the case 11. has been done.

An operating rod 13 is integrally provided at the other end of the balance 9 and extends laterally, and a weight signal generator consisting of a quantitative limit switch 14 for detecting the balance of the balance 9 is located near the lower end of the operating rod 13. A pre-quantification switch 15 for detecting a state immediately before balance of the balance 9 is provided adjacently below the end of the operating rod 13, and the quantitative limit switch 14 is connected to the charging magnet 4. A balance clamp device 17, which is electrically connected to the stirring device 6 and the electric operation panel 7 and which locks the operation rod 13 of the balance 9 by the magnet 16, is released.

The weighing hopper 8 is provided with a pair of electrode plates 18, 18 along the opposing upright side walls in the grain passing direction, and a discharge gate 19 is attached to the discharge port at the lower end of the weighing hopper 8 so as to be openable and closable. One of the electrode plates 18° 18 is this electrode plate 18.
．． The capacitance meter 20 is connected to a sampler 21 for extracting the capacitance value measured by the capacitance meter 20.

The plastic plug 21 is connected to a hold circuit 22 that serves as a holding device for holding the capacitance value taken out by the sampler 21, and the hold circuit 22 is connected to an indicator 23 that serves as a display device that converts the capacitance value into a moisture content and displays it. connected to the capacitance meter 20. Sampler 21. The hold circuit 22 and indicator 23 are each provided in a part of the hopper scale. The sampler 21 is equipped with a quantitative limit switch 1.
4, and a command signal for taking out and holding the output signal of the capacitance meter 20 is used as the output signal of the quantitative limit switch 14.

24 is a discharge magnet serving as a discharge gate opening/closing device for opening and closing the discharge gate 19 at the lower end of the weighing hopper 8;
When the grains in the weighing hopper 8 reach a predetermined weight, the discharge gate 19 opens the discharge port in response to the output signal of the quantitative limit switch 14, and after the grains accommodated in the weighing hopper 8 are discharged into the chute 12, The discharge gate 19 closes the discharge port, and the gates 3 and 3' are opened to introduce the next grain from the input chute 2 into the weighing hopper 8, and these operations are repeated. .

An air control panel 25 operates the air cylinder 5, and controls the amount of air supplied to the air cylinder 5 based on an output signal from the electric operation panel 7. IOR is an input start signal, and OR is an output signal.

Further, the setting weight 10 corresponds to a preset weight, and the discharge gate 19 of the weighing hopper 8 is closed via the discharge magnet 24 in response to a command signal from the electric operation panel 7, and the input from the electric operation panel 7 is In response to the start signal 10R, the charging magnet 4 and the air cylinder 5 are actuated to open the gates 3 and 3' of the charging chute 2, and the grains in the charging chute 2 flow down to the electrode plates IS and IS in the weighing hopper 8. storage.

At the same time that grains of a predetermined weight balanced with the setting weight 10 are thrown into one hopper 8 and stored, the localization limit switch 14 sends an output signal and the gates 3 and 3' are closed. Before that, when the amount of grains input into the weighing hopper 8 reaches about 90%, the gate 3' is opened to a certain extent by the output J signal of the pre-quantification switch 15.
The lever clamp equipment 17 is released from the operating rod 13 of the balance 9, and the double inner gate 3' is operated by the air cylinder 5) to limit the discharge amount from the input chute 2. .

Next, to explain the operation of this embodiment, the setting weight 10 suspended on the other side of the balance 9 is made to correspond to the weight to be set, and the discharge magnet 24 is activated by a command signal from the electric operation 5J7. Discharge gate 1 of weighing hopper 8
At the same time, the charging magnet 4 and the air cylinder 5 are activated by the charging start signal 10R to open the gate 3.3' at the lower end of the charging chute 2.
The grains inside the electrode plate 18.18 of the weighing hopper 8 from the discharge port.
It flows down and is stored.

When the input Φ of grains in the weighing hopper 8 reaches about 90%, the pre-positioning switch 15 sends an output signal, actuating the magnet 16 and locking the balance clamping device 17 from the operating rod 13 of the balance 9. and release the air control panel 25.
The air cylinder 5 is activated to limit the amount of grain discharged from the input chute 2 by opening the inner gate 3' to a certain extent, so that the amount of grain input from the input chute 2 into the weighing hopper 8 is reduced. . Setting weight 1 in weighing hopper 18
At the same time that a predetermined weight of grains balanced with 0 is stored and accurate weighing is performed, the operating rod 13 of the balance 9 operates the constant temperature limit switch 14, and the fixed quantity limit switch 14 sends an output signal to the input chute. The second gate 3.3' is closed.

Also, the grains in the IL heavy upper 8 are spread a predetermined distance of 3? Then, the sampler 2 is activated by the output signal of the quantitative limit switch 14.
1 is activated, the capacitance of the grain between the electrode plates 18 and 18 in the weighing hopper 8 is measured by the capacitance meter 20, and the sampler 21 takes out the capacitance value of the capacitance meter 2O, A hold circuit 22 holds the capacitance value taken out by the sampler 21, and an indicator 23 converts this capacitance value into a moisture content and displays it.

When the moisture content is displayed on the indicator 23, the discharge signal (OR) of the limit switch 14 indicates discharge!
operates, releases the discharge gate '19 at the bottom of the weighing hopper 8, and transfers the grains of a predetermined width in the weighing hopper 8 to the case 11.
The liquid is discharged into the lower chute 12 and introduced into a temporary storage tank sorted by moisture content (not shown) or into a dryer entrance path. Furthermore, the released discharge gate 19 is closed again after a predetermined period of time has elapsed, and the gate 3゜3' of the input chute 2 is opened, and the next grain is input into the weighing hopper 8 again to meet the predetermined weight. The series of operations of measuring the moisture content is repeated.

In addition, although the electrically operated hopper scale is shown in the embodiment of the present invention, it is also possible to use a mechanically operated hopper scale in the same way. By providing this, the moisture content of the whole grain can be detected without sampling as in the conventional method, and it may be of a type that can be divided into predetermined M piles.

Effects of the Invention As described above, the hopper scale of the present invention for country elevators, rice centers, etc. is provided with a weighing hopper below a charging chute having a gate connected to the opening/closing device. A weight signal generator is connected to the weight scale, and a pair of electrodes are provided in the weighing hopper, and the electrodes are connected to a display device via a capacitance meter, a sampler, and a holding device, and the weight signal generator is connected to the weight scale. The generator is connected to the sampler, the gate opening/closing device of the input chute, and the discharge gate opening/closing device of the weighing hopper, and when the weighing hopper reaches a predetermined weight, the gate opening/closing device of the loading chute is operated to close, and the electric capacity is increased in the sampler. Take out the output of the meter,
Thereafter, by communicating with each other to open the discharge gate opening/closing device of the Kt ffi hopper, the weight of the grains charged and stored from the input chute to the electrode opening in the weighing hopper provided below the input chute was increased. When a predetermined weight preset on the scale is reached, a weight signal generator provided in the scale emits an output signal 5, and the gate opening/closing device is operated to open the input port to the weighing hopper. The charging of grains to the hopper is stopped, and the electrical capacitance ffl value of the grains of a predetermined weight stored in the pair of electrodes in the Iζ weighing hopper is read out by the sampler, and this electrical capacitance value is measured by electrical capacitance. It is held by a holding device, and this measured value is converted to moisture content and displayed on the display device, and the discharge gate is opened and closed! In order to discharge a predetermined liter of grains in the weighing hopper by opening the device, the moisture content of the entire predetermined amount of grains with widely varying moisture contents stored in the electrode is opened, regardless of the density. Since the ratio can be measured accurately and the amount to be measured by ff1ffi and the amount to be measured by electric 8-contact accurately match, the value displayed on the display device is always the moisture content at the specified weight of the grain, and the weight signal By controlling the opening and closing of the input chute gate and the opening and closing of the discharge gate of the 51-quantity hopper using signals from the generator, it is possible to weigh the received grain in batches to a predetermined weight using a weighing scale, and all grains received at the facility can be weighed in batches. It is possible to accurately measure the average moisture content of the entire grain at the same time as weighing the grains, and compared to the conventional sampling method for measuring moisture content, measurement errors can be extremely reduced, eliminating the need for labor for measuring moisture content. .

Since weight measurement and water content measurement are performed simultaneously, there is no need for 9 hours in a special location for water content measurement, and the grains between the electrodes reach the specified weight, and the grains are stabilized after being fed from the fixed position. When the filling state is reached, the multilayer signal generator sends an output signal, and the output signal of the capacitance meter is taken out and held, so the moisture content of the grains that do not match the set electrical type is displayed. There is no display on the device, and there is no measurement error in the moisture content depending on the grain hair between the electrodes and the filling state.

Furthermore, since the amount to be measured by weight and the amount to be measured for moisture are exactly the same, the error between the received amount and the finished amount after drying adjustment is extremely small for received grains with large variations in moisture content. As a result, troubles between farmers and facilities can be resolved.

[Brief explanation of the drawing]

The figure is a schematic front view of a hopper scale according to an embodiment of the present invention.

Claims (1)

[Claims] A weighing hopper is provided below a charging chute having a gate connected to a gate opening/closing device, the weighing hopper is connected to a weighing scale, and the weighing scale is provided with a weight signal generator, and a pair of electrodes are installed in the weighing hopper. the electrode is connected to the display device via the capacitance meter, the sampler and the holding device, and the weight signal generator is connected to the sampler, the gate opening/closing device of the input chute, and the discharge gate opening/closing device of the weighing hopper;
When the weighing hopper reaches a predetermined weight, the gate opening/closing device of the input chute is operated to close, the output of the capacitance meter is taken out by the sampler, and then the discharge gate opening/closing device of the weighing hopper is communicated to open and close. Hopper scales for country elevators, rice centers, etc., which are characterized by