JPH04353385A - Operation control device in grain drying system - Google Patents

Abstract

PURPOSE:To obtain the optimum operating condition by a constitution wherein a selecting means, selecting an independent specification or a system specification, is provided and interlocking with a central control board is intercepted when the independent specification is selected while the system is operated in conjunction with other machines by the signal of the central control board when the system specification is selected. CONSTITUTION:When the specification selecting switch of a controller has selected independent specification, interconnection with a central control board is intercepted and normal drying operation is effected by a drying machine 4. When the specification selecting switch is set at double modes, a changeover valve is switched to the B-side of an opening, a bottom valve 30 is opened, grains in a reserving tank 5 enter the drying machine 4 and excessive grains, which can not be received into the drying machine 4, are charged into the reserving tank 5. Upon subsequent operation, the grains, which are passed through a drying unit, enter the reserving tank 5 through an elevator 15 and receive tempering effect whereby drying is repeated until a predetermined humidity is obtained. Grains, dried up to a predetermined moisture, are shifted to the upper reserving tank 5 and receive natural cooling effect for a predetermined period of time, then, are shifted thereafter to a regulating unit through a discharging conveyer.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for a grain drying system.

0002

[Prior Art] A plurality of grain dryers are installed, and the received grain is received from one receiving section, loaded into one of the empty tanks, discharged after drying operation, and then transferred to the hulling process. It is known that a series of these operational controls is performed by a central control panel (Japanese Patent Laid-Open No. 62-202989).

0003

[Problems to be Solved by the Invention] Incidentally, grain dryers are used systemically by connecting a plurality of grain dryers to a common loading conveyor, discharge conveyor, or preparation machine. is sometimes used as a standalone specification. For example, it is necessary to receive command signals from a controller of each dryer that is separated from the central control panel and to dry the grain in the dryer individually.

0004

[Means for Solving the Problems] Therefore, the present invention has the following features:
In a grain drying and preparation system that has multiple grain driers and common equipment such as a loading conveyor and a discharge conveyor, these common equipment and grain driers are operated based on the operating output from the central control panel b. , the grain dryer controller a, a... has a stand-alone specification that operates the grain dryer independently regardless of other dryers, or operates only under possible conditions based on the operating status of other grain dryers. The grain drying system is configured as an operation control device in which a selection means for selecting a system specification is provided, and the operation of each part based on the operation switch is operated in conjunction with the common equipment according to the selection contents.

[0005]

[Operation and Effect of the Invention] A means for selecting between individual specifications and system specifications is provided, and when each grain dryer is in independent specifications, it is disconnected from the central control panel and can be operated in the same way as a normal dryer. At times, the machine can be operated based on command signals from the central control panel while maintaining coordination with other machines, and has the effect of selecting the optimal operating situation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be explained based on the drawings. Figure 1 shows a grain drying and preparation device, with a grain receiving pit A in the building and a plurality of grain dryers B in the vicinity of this pit A.
, B..., followed by a storage hopper C, a hulling device D, a weighing device E, etc., as well as elevators and the like for transferring and supplying grain between each device.

Of these, four grain dryers B, B, etc. are provided in the illustrated example, and each has the following configuration. That is, it consists of a dryer 4 in which a storage section 1, an aeration drying section 2, and a grain collecting section 3 are stacked vertically, and a storage tank 5 placed on the top of the four-dryer frame. is constructed in the shape of a vertically long rectangular parallelepiped. Among these, the ventilation drying section 2 of the dryer 4 has hot air chambers 7, 7 and exhaust chambers 8, 8,... The air sucked and ventilated by the suction fan 9 is hot-aired by the burner 10, and the hot air is applied to the grains flowing down the grain-flowing passages 6, 6, . . . 11,11...
are delivery valves disposed at the bottom of each of the grain flow passages 6, 6, . . . to gradually cause the grain to flow down.

A horizontal transfer gutter 13 equipped with a transfer spiral 12 is provided at the lower part of the grain collection section 3 which receives the grains fed out from each of the above-mentioned feed-out valves 11, 11, and collects them in the center side, and a lateral transfer gutter 13 with a transfer spiral 12 is provided at the bottom of the grain collection section 3, which receives the grains fed out from each of the feed-out valves 11, 11, . The 14th section is connected to the elevator 15. This elevator 15 is located on the back side of each machine frame of the dryer 4 and the storage tank 5, and is erected at a slightly higher height than the storage tank 5. Inside the elevator 15, an endless belt with buckets attached at predetermined intervals is wound between upper and lower pulleys, and is configured to scoop up grains, etc. from the joint opening 14 and throw them toward the dumping opening 16 at the upper part. It is said that

[0009] Also, a switching valve 17 is provided at the outlet 16.
It has a configuration in which it can be selectively supplied to the first opening (a) and the second opening (b) according to the switching operation. The discharge side end of the first opening A is exposed to a communication pipe 18 located before and behind the ceiling of the storage section 1 and connected to the starting end of a circulation transfer gutter 20 having a built-in transfer spiral 19. On the other hand, the second opening (b) looks into the starting end side of the cooling transfer gutter 22 which incorporates the transfer spiral 21 and which is arranged in the same manner on the ceiling of the storage tank 5 side.

The above-mentioned transfer spiral 19 gutter 20 and transfer spiral 2
1 gutter 22 is extended to the upper central position of each tank section, and can supply water to the rotating diffusion plate 23 or 24. The storage tank 5 has a cooling section 25 having approximately the same capacity as the storage section 1 of the dryer 4.
The lower part thereof is formed into two tanks with a V-shaped cross section, each of which is formed into a discharge transfer gutter 26, 26, and is equipped with transfer spirals 28, 28 for discharging the collected grains sequentially flowing down for horizontal transfer. ing.

Bottom valves 30, 30 as opening/closing mechanisms are provided at the bottom of each discharge transfer gutter 26, and these bottom valves 30, 30
The bottom portion can be opened by appropriately rotating the bottom portion around a horizontal fulcrum. With the switching operation of these bottom valves 30, the grains can flow down into the storage section 1 on the side of the dryer 4 through the open ceiling part C of the dryer 4. Further, each transfer terminal end side of the discharge transfer spirals 28, 28 is made to protrude to the outside of the machine frame, and the protrusion part is connected to a transfer gutter 31, which is attached to the outer surface of the machine frame.
31, and is supplied to a discharge conveyor 34 in the form of a belt conveyor via downstream guide tube portions 33, 33 from respective discharge ports (not shown) on the end side.

The supply starting end side of the circulation transfer gutter 20 is located outside the machine frame, and a hopper 32 is provided so as to be able to see into the lower part of the communication pipe 18, and the transfer gutter is located directly below the connecting portion of the hopper 32. A discharge port is formed on the lower side of the discharge port 20 and is configured to be opened and closed by an on-off valve (not shown), and a guide cylinder portion 35 is connected thereto. The circulation transfer gutter 20 is located between the left and right discharge transfer gutter 26, and each guide cylinder portion 33,
33 and 35 are installed side by side on the left and right, and the discharge conveyor 3
4 along the transport direction.

[0013] The discharge conveyor 34 is provided to connect the grain dryers B, B, . and is supported and attached to the machine frame and the elevator 15 frame as appropriate. Reference numeral 39 denotes a tension conveyor provided below and parallel to the discharge conveyor 34, which is in the form of a flight conveyor or a belt conveyor, and its box-shaped frame portion is supported and fixed to the box-shaped frame portion of the discharge conveyor 34. This tensioning conveyor 39 is configured to be interlocked in forward and reverse directions.

A discharge port (not shown) is provided in the middle of the loading conveyor 39, and an on-off valve (not shown) is provided in the outlet to separate the plurality of grain dryers B, B...individuals. Elevator 15
The guide tubes 40, 40, . . . are connected to the guide tubes 40, 40, . Furthermore, the pit A
An elevator 41 is provided so as to be able to supply grain to the loading conveyor 39, and dried grains from the discharge conveyor 34 are fed and transferred to the storage hopper C via the elevator 42.

The hulling device D is of a known type and consists of a hulling section, a paddy/unpolished rice sorting section, and the like. A brown rice sorting and weighing device E is disposed on the brown rice outlet side of this paddy brown rice sorting section, and the finished brown rice from which waste rice has been removed is packed into bags by predetermined weight. Figure 5
1 shows a control block diagram, which includes a controller a for executing drying control of the two-layer dryer consisting of a storage tank and a dryer, and the arithmetic control section 50 includes dryer 4 side operation switches 51 and 52. , 53, 54, 55, storage tank 5 side operation switch 56, 57, 58, 59, 60 input, single/double setting switch 61 input, moisture meter, hot air temperature detection analog input, upper and lower full sensor 62,
63 input, open/close detection sensor 64, 65 input of switching valve 17, open/close detection sensor 66, 67 input of left and right bottom valves 30, open/close detection sensor 68, 69 of tensioned shutter sensor, remaining amount sensor 70, 70 on storage tank 5 side , dryer 4 side remaining amount sensor 7
1, 71, motor 72, 73, 74 overload detector input,
and other configuration switches and sensor inputs, while
The output information includes combustion system output, motor output, operation display monitor output, abnormality display monitor output, and the like. Note that the controller a has an operation information input section 7 from the central control panel b.
5 and a dryer information output section 76 to periodically exchange information with the central control panel b, so that the central control panel b side can collectively control the operation.

77 is an independent/system setting switch, which allows the grain dryer to be operated independently regardless of other grain dryers, or to operate multiple grain dryers as a system by transmitting and receiving information from the central control panel b. You can set whether to drive. still,
If system operation is selected, remote centralized control from the central control panel b becomes possible, and if stakeout operation is selected, common equipment such as the stakeout conveyor will start operating, but the loading operation for other grain dryers will not be possible. When this occurs, processing is performed to avoid or limit the same operation and eliminate mixing of grains. Similarly, when loading or discharging operation is selected on the controller a side of an individual dryer, if another dryer is already performing loading or discharging operation, the operation of the dryer will not be accepted. It is structured as follows.

The central control panel b consists of a monitor display section 78, a control computer unit 79, an operation panel 80, and the like.
Automatic loading and reading mode setting switches 81 and 82
, 83, 84, operation switches 85, 86, 87, 88 for "filling", "drying", "discharging" and "stop" for the dryer, opening/closing switches 89, 89 for the bottom valves 30, 30 for the cooling tank, and conveyance. System common equipment manual operation switches such as a switch 90 for a tensioning elevator, a switch 91 for a tensioning conveyor, a switch 92 for a discharge conveyor, a switch 93 for a discharge elevator, etc. are provided.

Note that the "selection" mode here refers to a mode in which the operator selects the machine to be operated from the list of connected dryers B displayed on the monitor display section 78. In the "determination" mode, the computer determines the machine being operated and displays it on the monitor display section 78. In the "automatic stakeout" mode, the computer determines which machines can be staked out and automatically performs stakeout operation. “Read” Displays details of the operating state of the dryer on the monitor display section 78.

The operation of the above example will be explained. Grain harvested in a field, such as paddy, is transported by truck or the like and put into pit A. A predetermined dryer 4 is selected as the destination, and the operation switch 56 of the dryer 4 is turned on to execute this process. Then, the grains received in the pit A are lifted up by the elevator 41 and supplied to the starting end of the loading conveyor 39, and then loaded from the conveyor 39 via the elevator 15 into the predetermined dryer 4.

[0020] When the pasting is completed, the next step is to move on to drying work. At this time, the drying operation switch 52 of controller a
Turn on. Each drive output is sent to the grain circulation system and combustion system, and circulation drying begins. Hot air drying and tempering in the storage section 1 are repeated, and when the moisture value detected every moment matches the finished moisture value set by a setting switch (not shown), drying is completed.

The above is the single/double setting switch 61
Although we have explained drying operation with single mode set, double mode operation can be set when the throughput is large. When the switch 61 is set to the double side, the switching valve 17 is switched to communicate with the opening side during the filling operation and the drying operation, and the bottom valve 30 is opened and the storage tank 5 is opened.
Grain can be flowed down from there to the storage below, and the various parts of the conveyance system associated with this can also be switched to be drivable. Therefore, the grains to be piled up enter the dryer 4 from the side of the storage tank 5, and the excess grains that cannot be accommodated in the dryer 4 are piled into the storage tank 5. Next, during drying operation, the grains passing through the drying section reach the storage tank 5 from the elevator 15 and are subjected to a tempering action and repeatedly dried to a predetermined moisture content. The grains thus dried to a predetermined moisture level are transferred to the upper storage tank 5 and subjected to cooling action for a predetermined period of time. In this case, the operation switch selects 54. After cooling for a predetermined period, it is transferred to the preparation section by the discharge conveyor 34.

Although single operation was selected at the start of loading, if the amount of grain brought in was larger than expected, the fullness sensor 6
By stopping at step 3 or selecting double operation just before that, filling or drying can be executed in the same state. By the way, when the operation switch operation of the controller a of a certain dryer is input, the central control panel a reads this (step 10).
Subsequently, when it is determined that it is ON (step 11), the setting state of the individual/system setting switch 77 is read (step 12). When configuring the system (step 13)
, the dryer information output is turned on (step 14), that is, the operation switch operation details described above are output, and the central control panel b inputs and reads this operation information (step 15).
). Next, it is determined whether or not the relevant operation is possible based on the operating status of other dryers, etc. (step 16), and if possible, the motor system output is turned ON and operation is started (step 17).
). On the other hand, if this is not possible, a display prohibiting driving is displayed on the monitor (step 18) (FIG. 8).

[0023] In step 13 above, when the individual operation is selected, it is not necessary to determine whether or not operation is possible, and the process directly goes to step 17, where the motor system output is turned on and operation is started. That is, when setting the system, data is exchanged with the central control panel b, and operation can be started if permission is given from the central control panel b.

[0024] The central control panel b is equipped with a plurality of two-layer grain dryers and common conveyance equipment for centralized operation, but when loading or discharging is selected with the controller a on the grain dryer side, this Related conveyance systems, such as the tensioning elevator 41, the tensioning conveyor 39, or the discharge conveyor 34 and the discharge elevator 42, are linked. That is, in FIG. 9, the central control panel b reads dryer information input (step 21), and determines whether a single operation is performed (step 22). If it is determined that there is an operation (step 23), the related conveyance system output is turned ON (step 24). Therefore, regardless of whether it is operated on the central control panel b or on the dryer side, the related transport system machines are linked in the same way, so there are only two operating points.
It's convenient and easy to use. In this case, when the dryer side controller a enables the steam transport system to operate, if the loading or discharging work of another machine is already in progress, the operated machine will be disabled and the It is preferable to display the contents on the controller a (FIG. 10).

[0025] Furthermore, when the common conveyance system equipment is configured to operate automatically in conjunction with the operation of the dryer as described above, a manual operation setting switch 94 is specially provided, and the manual operation switch is set. In this case, it is preferable to adopt a configuration in which each transport device can be operated independently by each operation switch 95, 96, . . . rather than by a signal from the central control panel. Furthermore, at that time, the input of the manual operation switch 94 is detected by the central control panel b, and when the manual setting is reached, the automatic operation control that operates in conjunction with the dryer is stopped, and all operation control of the conveyance equipment is performed. First, it is better to control only the independent operation of the dryer (Fig. 11,
12).

[Brief explanation of drawings]

FIG. 1 is a front view of the entire system.

FIG. 2 is a front sectional view of the grain dryer.

FIG. 3 is a side view of the grain dryer.

FIG. 4 is a rear view of the grain dryer.

FIG. 5 is a control block diagram.

FIG. 6 is a schematic diagram of the central control panel.

FIG. 7 is a schematic diagram of the central control panel-controller connection.

FIG. 8 is a flowchart diagram.

FIG. 9 is a flowchart diagram.

FIG. 10 is a flowchart diagram.

FIG. 11 is a block diagram.

FIG. 12 is a flowchart diagram.

[Explanation of symbols]

A Receiving pit B, B Grain dryer C Storage hopper D Hulling device E Weighing device
1 Storage section 2 Ventilation drying section 3 Grain collecting section
4 Grain drying section 5 Storage tank 6, 6 Grain flow passage 7, 7 Hot air chamber 8, 8 Exhaust chamber 9 Suction fan
10 burner 13 horizontal transfer gutter 15 elevator 15
17 Switching valve A First opening B Second opening
20 Circulation transfer gutter 22 Cooling transfer gutter 25 Cooling part
26, 26 Discharge transfer gutter 30 Bottom valve (opening/closing mechanism) 31, 31 Transfer gutter 33, 33 Downstream guide tube 34 Discharge conveyor
35 Guide cylinder 39 Pitching conveyor 77 Individual/system setting switch

Claims (1)

[Claims] Claim 1: A grain drying and preparation system that is provided with a plurality of grain driers and has common equipment such as a loading conveyor and a discharge conveyor, and which controls the operation of these common equipment and grain dryers based on the operating output from a central control panel b. In those that operate grain dryers, controller a, a... has a stand-alone specification that allows the grain dryer to operate independently regardless of other dryers, or is possible based on the operating status of other grain dryers. An operation control device for a grain drying system, which is provided with a selection means for selecting a system specification that can operate only according to the situation, and in which operation of each part based on the operation of an operation switch is operated in conjunction with the common equipment according to the selection contents.