JPH07270069A - Mixing device for drying grain - Google Patents

Abstract

PURPOSE:To provide a mixing device for drying grains, which unifies the accumulating heights of grains in a reserving bin and reduce the variability of drying of the grains. CONSTITUTION:In a grain drying device, provided with a plurality of reserving bins 11A arranged so as to have the constitution of supplying air for drying while respective bins are provided with mixing devices to mix grains, supplied sequentially, with the grains on the way of drying, or dried gradually, mixing screws 21a, 21b are arranged vertically in a unit bin while the screws are constituted so as to mix the grains by the rotation thereof while moving in related condition securing a given distance in longitudinal and lateral directions. Charging condition detecting means 40a, 40b are provided at the positions of the mixing screws 21a, 21b to control one part of mixing screws among a plurality of mixing screws so as to stop or drive with a low speed rotation while judging the necessity of the rotation of the screws based on the result of detection of charging condition. A rotation control means is constituted so as to control the rotation of the mixing screws 21a, 21b independently and controls the rotation of the screw with a high speed or a low speed in accordance with the condition of charging height of the grains.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a dry grain agitator.

[0002]

2. Description of the Related Art Conventional so-called storage bins for receiving received grain have a drying ventilation function for the purpose of temporary storage to prevent stuffiness due to moisture, but finish drying is not installed separately. Moreover, it is necessary to separately install the storage silo after that. Therefore, in a large-scale dry preparation and storage facility, the construction cost increases, and it is desired to reduce it.

Therefore, there is a grain drying method using a storage bottle (for example, Japanese Examined Patent Publication No. 63-37874), and in this drying method, a plurality of vertical stirring screws are arranged to stir the grain evenly. No uniform drying is performed. By the way, although this stirring screw also has a function of eliminating the unevenness of the stuck grain, since it is a common practice to provide a plurality of stirring screws in one storage bottle, If the other screws are likewise rotated in conjunction with each other while being swollen with respect to the grain concave portion by rotation, the surface unevenness is rather caused when the other screws are deposited at a prescribed height.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and bottles 11A, 1 for receiving and storing grains are stored.
A plurality of 1A are provided, and the bins 11A, 11A are configured to supply drying air, and each bin is equipped with an agitator so that grains that are sequentially supplied are mixed with grains that are being dried or have been dried. And then gradually dry,
Multiple stirring screws 21a, 21b in a single bottle
Are arranged in the vertical direction, and these screws are configured to stir the grain by rotation while moving in a linked state while ensuring a certain distance in the front and rear or left and right, and the grain accumulation state at the positions of the plurality of stirring screws 21a and 21b. Straining state detection means 40a, 40b for detecting the rotation speed is provided, and rotation control means for stopping a part of the plurality of stirring screws or interlocking with the low speed rotation while determining whether or not the screw rotation is necessary based on the detection result. The screw stirring screws 21a and 21b are provided so as to independently control the rotation.

[0005]

The operation and effect of the present invention: In the bottle 11A in which a grain is put in a predetermined amount, a plurality of stirring screws 21a, 21
When the screw is rotated while b moves along a predetermined movement pattern, the grain in the vicinity of the screw rises due to the rotation and vertical stirring is performed while forming a raised portion on the surface side. Although multiple stirring screws are independently linked in rotation, unevenness occurs on the surface of the stake grain, and when the stirring screws are applied, the unevenness of the unevenness becomes rather large and it is suitable for average drying. However, in the present invention, since the stake-in state detecting means 40a, 40b are arranged for each stirring screw 21a, 21b,
It is possible to determine the height of the laid grain at each screw position, and by stopping the screw rotation or rotating at a low speed above the average height, the agitation is temporarily interrupted for the grain portion where the surface height is high, It is possible to prevent the height difference of grain height from expanding. Therefore, it is possible to perform drying with less moisture unevenness under the same blast condition because the difference in grain deposition height is small.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The cargo receiving field 2 including the cargo receiving hoppers 1, 1 ... Is configured separately from other main equipment groups so as to form passages on both sides of the cargo receiving hoppers 1, 1 ... so that the transport truck can easily enter and leave. .

The rough hopper 3 and the load receiving and weighing machine 4 for receiving and weighing the grain are connected to the load receiving hopper 1 through a transport mechanism.
These are installed in close proximity to each other along with a sorting machine 5 and a rice hulling plant 6 that select received grain or dried grain, and are configured in the same building 10 as an operation room 7, a voluntary inspection room 8, a product storage area 9, etc. Has been done. Storage and drying bottles 11, 11, ... Are arranged in series in the building 10. In this embodiment, the left and right A, B, and C3 series × 6 bins are accommodated in the building 12 for about 50 tons per unit, for a total of 18 bins.

The bins 11A, 11B and 11C are shown in FIGS.
As shown in FIG. 4, the same type of rectangular bottle is used, the outer wall 11a is made of glass wool or the like as a heat insulating material, and the intermediate partitions 11b and 11c of the bottles are made of normal wall material. . The bottoms of the bottles 11A, 11B, and 11C have a flat sweep floor 13 shape, and a ventilation space 14 is formed below the bottom.

Building 1 of the bottles 11A, 11B, 11C
A belt-conveyor-type stake conveyor 1 on the upper side
5, 15 ... Are provided in parallel, the space above the bin in which these conveyors 15 are disposed is provided with sealing walls 16 and 16 by a heat insulating material so as to form spaces in the center and left and right in cross section. A floor material 18 is stretched over the central compartment 17, and the compartment 17 can be used as an inspection passage. Stretching chutes (not shown) are provided in the sealing partition walls 16 and 16 for the respective bins 11A, 11B and 11C. Reference numeral 19 denotes a flight conveyor which is horizontally extended from the grain elevator discharge portion so that grain can be supplied to the staking conveyor 15. The staking conveyor 15 is configured so that it can be controlled to move in the longitudinal direction and the grain can be supplied to a predetermined bin.

For the six A-series bottles, two stirring screws 21a and 21b are provided for each bottle 11A.
To provide. These screws 21a and 21b are an example of a stirring device, each of which is provided with a drive motor 22 and 22, and a support frame 23 of the screws 21a and 21b is a bottle 1
1 is configured to reciprocate back and forth along rails 24, 24 provided at the upper end, and further configured to reciprocate while maintaining a left and right screw interval in the direction along the support frame 23, thereby dividing a square bin into left and right. In addition to the zigzag shape, the entire surface can be stirred while moving in a predetermined pattern.

That is, the support frame 23 includes the left and right vertical frame portions 23.
a, 23a and front and rear lateral frame portions 23 provided to connect them
b, 23b, etc. are rigidly formed as an integral structure, of which the vertical frame portions 23a, 23a are provided with a rotary shaft 25 in a left-right linked manner. The rollers 26, 2 are provided at the left and right ends of the rotary shaft 25.
6 and is guided by the rails 24, 24 on the side wall of the bottle. Reference numeral 27 denotes a forward / reverse rotation motor that interlocks the rotary shaft 25 with forward / reverse rotation. The lateral frame portion 23b of the support frame 23,
23b, a movable frame 28 having a length about half of the right and left length of the support frame 23 is placed via rollers 29, 29 ... In a mounted state so as to be movable along the lateral direction of the support frame 23. Set up. Reference numeral 30 denotes a forward / reverse rotation motor in which the shafts of the rollers 29, 29 ...

Rotating vertical axes 31a and 31b are axially supported on the moving frame 28 at appropriate intervals, and stirring screws 21a and 21b are connected to the lower portions thereof in a detachable and rotationally interlockable manner. The pulleys 32a and 32b at the upper ends of the respective rotating vertical axes 31a and 31b are configured to rotate in a fixed direction by independent motors 22a and 22b, respectively. A movable frame 28 that can move to the left and right is placed on the support frame 23, and a motor is attached to the support frame 23.
Since it can be installed on the rail in a state where 1a and 21b are set, the installation can be simplified. Further, the stirring screws 21a and 21b can be brought closer to the side wall of the bottle as compared with the conventional configuration in which the driving devices for traveling are separately provided, and the stirring flow is improved.

In the above-mentioned A series, a stirring screw is provided, but in the B and C series, such a stirring screw is not provided and a diffusing device is provided in the feeding supply section. 34, 34 ... Discharge conveyors for discharge and rotation, which are in the form of a belt conveyor, and have the ventilation space 1
4, 14, ... Are provided at positions facing the wind tunnel 35 for each series.

A blower chamber 36 is provided in a state of being connected to the building 12 for the bins 11A, 11B, 11C, and blowers 37, 37, ... Are arranged in connection with the inlet of the ventilation space 14 for each series. 38 are heating devices, and the blower 37 can supply hot air to the ventilation space 14 by operating the heating devices.
The operation room 7 is provided with an operation control unit 39, which has an operation control mechanism for each part and a setting input mechanism. As an input signal,
Each of the motors 27, 30 and 2 is used as a weighing signal of the cargo receiving and weighing machine 4, a detection value signal of a squeezing amount detector described later, and an output signal.
Each drive signal to 2a and 22b, etc. are also included.

As the operation mode of the bins, since the amount of sticking for each bin 11 can be arbitrarily set by obtaining the weighing information from the cargo receiving and weighing machine 4, the bins of the bins B and C are spread. A dry main form in which the grain is thinned to obtain a relatively high drying loss rate, and in the A series, grains that have reached or come close to the finishing moisture from the B and C series have been dried, Agitated and dried form that mixes and agitates with new consigned grain that has been added or is additionally loaded on the upper layer, and short-term storage of dried finished grains in all A, B, C series until hull shipment or The configuration is such that it can be stored for a long period of time and can be stored.

In each of the bottles 11A, the stirring screws 21a and 21b are structured to be able to stir and mix the entire surface of the bottle 11A while drawing a predetermined pattern while keeping a constant interval. An example of the pattern is as shown in FIG. By moving the support frame 23 and the moving frame 28 with respect to the rail, it is possible to move the stirring screw in the order of symbols, ....

In the vicinity of the stirring screws 21a and 21b, a sedimentation state detecting means, for example, ultrasonic grain type grain adhering amount detectors 40a and 40b are provided by using a moving frame 28. The detection results of the stake amount detectors 40a and 40b are input to the operation control unit 39, and in comparison with the average stake amount line (b) based on the load receiving measurement information, the detection result of the detector 40 is the average value. The operation control unit 39 outputs a stop command signal to rotate when it falls below the stake amount line (a) and to stop the rotation when it is swelling to promote the swelling.

Reference numeral 41 denotes a circulation type grain dryer provided in a plurality of units, which is connected to the supply line from the load receiving and weighing machine 4 and each of the discharge lines of the A to C series to supply grains.
In addition, the grains discharged are rice hulling plant and C series bottle 11C.
It is a configuration that is stored back to. The operation of the above example will be described.

The received high-moisture grain is received and weighed by the weighing machine 4
After passing through, etc., they are sorted by a predetermined amount and placed in the B or C series bins 11B and 11C. Here, the air blow blows the thin-layered grain at a relatively high drying rate. After one day and night, these are either empty bottle 1
Combined in 1B or 11C and continued to dry. Although the dryness reduction rate in the thin layer state cannot be obtained, the drying continues moderately, and when it reaches the vicinity of the scheduled water content, it is transferred into the A series empty bottle 11A. Here, new consigned grain has already been poured, and the grain is mixed with the dried grain and dried. That is, the motor 27 and the motor 30 move the support frame 23 back and forth while the moving frame 28 moves left and right to draw a predetermined pattern (FIG. 8) in plan view, and the stirring screw 21
a and 21b move, but at this time, the motors 22a and 2b
Since 2b also rotates together with the screws 21a and 21b to rotate, the grains are agitated in every corner, the grains having a different water content are mixed, and the air is blown from below to be dried to a predetermined moisture value.

By the way, the stirring screws 21a, 21b
Is for moving while rotating along a predetermined pattern and stirring up and down by raising the grain on the bottom side, and the ultrasonic type penetration amount detectors 40a, 40b are constantly detecting the grain surface. However, the detected output is the operation control unit 39.
Entered in. In the operation control unit 39, the weighing signal of the load receiving weighing machine 4 and the grain moisture are input in advance. On the other hand, since the bulkiness in the bottle, that is, the average amount of overhanging is calculated, the average line of overhanging (A) is determined. The stuck amount detectors 40a and 40b are capable of outputting ultrasonic waves directly below to reflect the grain surface and detect the distance from the detector to the grain surface.
Since the installation heights of a and 40b can be known, the height of accumulation on the grain surface can be calculated from the difference between the detected values. It is possible to judge whether the position where the stirring screw 21a or 21b is present is above or below the average stake amount line (a) by comparing this accumulation height with the above-mentioned average stake amount line (a). For example, when the value is "lower" and lower, the stirring action is continued by the screw, but when the value is "higher" than the line (b) in the raised state, the motor 22a or 2 is used.
2b is output so as to stop the operation of the corresponding motor. In the illustrated example, the other stirring screw 21b is stopped while the stirring screw 21a side is rotating.

If the motor operation is stopped when the height difference from the average line amount (a) is a predetermined value or more, frequent start / stop can be prevented and overload operation is avoided. it can. The movement of the predetermined pattern by the motor 30 is performed continuously, but the screw 2
It is desirable to stop the movement of the motors 27 and 30 together with the one stop output, and in this case, there is no fear of screw damage.

As the stirring screws 21a and 21b move, the unevenness of the grain surface is made uniform. Grains dried to a predetermined water content can be stored in the bottle 11A or the bottles B and C as they are. Before transferring the agitated and mixed grain to the hulling process, check the water content, and the grain that has not been dried yet, or if urgent drying is necessary to secure an empty bottle, etc. , Dryers 41, 41, ...

In this embodiment, the bins 11A, 11A
Although B and 11C were formed with a flat sweep floor,
It is also possible to form an inclined floor plate as shown in JP-A-59-183282. Further, in the above embodiment, the stirring screw 21
Although a and 21b are configured to rotate or stop, motors that can realize low-speed rotation may be used, and there is an effect that the load at the time of restart is smaller than that in complete stop. Also, if the number of rotations of the motor 30 can be set arbitrarily, the moving speed along the pattern of the stirring screws 21a and 21b can be changed and adjusted, and the movement with respect to the average stake amount line can be adjusted arbitrarily, which is convenient. is there.

[Brief description of drawings]

FIG. 1 is a front sectional view of a main part

FIG. 2 is a partial plan view of the same.

FIG. 3 is a front sectional view of the bottle.

FIG. 4 is a side sectional view thereof.

[Figure 5] Overall facility plan

FIG. 6 is a device outline flow chart.

FIG. 7: Flow chart

FIG. 8 is an example of a movement pattern

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Receiving hopper, 2 ... Receiving yard, 3 ... Coarse selecting machine, 4 ... Receiving weighing machine, 5 ... Selector, 6 ... Hulling plant, 7 ... Operation room, 8
… Voluntary inspection room, 9… Product storage area, 10… Building, 11A, 1
1B, 11C ... Bottle, 12 ... Building, 13 ... Sweep floor, 14 ... Ventilation space, 15 ... Conveyor for staking, 16 ... Partition wall for sealing, 17 ... Compartment room, 18 ... Floor material, 19 ... Flight conveyor, 21a , 21b ... Agitating screw, 22a,
22b ... Drive motor, 23 ... Support frame, 24 ... Rail, 2
5 ... Rotating shaft, 26 ... Roller, 27 ... Forward / reverse motor, 28
... Moving frame, 29 ... Roller, 30 ... Forward / reverse motor, 31
a, 31b ... Rotation vertical axis, 32a, 32b ... Pulley, 34
... Ejection conveyor, 35 ... Wind tunnel, 36 ... Blower room, 37 ...
Blower, 38 ... Heating device, 39 ... Operation control unit, 40a,
40b ... stake amount detector, 41 ... circulating type grain dryer

Claims (1)

[Claims] 1. Bottles 11A, 11 for receiving and storing grains
A is provided in a plural number and configured to supply drying air to these bins 11A, 11A ... And each bin is equipped with a stirring device so that grains that are sequentially supplied are mixed with grains that are being dried or have been dried. In the case of gradually drying, a plurality of stirring screws 21a and 21b are vertically arranged in a single bottle, and these screws move in a linked state while securing a certain distance in the front-rear direction and the left-right direction. It is configured to agitate the grain by rotation, and provided with deposition state detecting means 40a, 40b for detecting the grain deposition state at the positions of the plurality of stirring screws 21a, 21b, and it is determined whether or not the screw rotation is required based on the detection result. While providing rotation control means for stopping or rotating some of the plurality of stirring screws at low speeds, the stirring screws 21a,
21b is a dry grain stirring device configured to independently control rotation.