JPH04332383A - Abnormality dealing method of on/off valve for grain drier - Google Patents

Abstract

PURPOSE:To prevent the breakage of a natural cooling device by a method wherein an on/off valve is opened to effect double drying when the on/off valve of a natural cooling and grain collecting trough is closed naturally while the circulation of grains is switched into the circulation through only a hot air drying device when faulty circulation of grains in the natural cooling device is detected. CONSTITUTION:Grains in the grain natural cooling and reserving chamber 1 of a natural cooling device 4 are dropped into the grain drying chamber 5 of a hot air drying device 7 through the on/off valve 3 of a natural cooling and grain collecting trough 2, then, flow down subsequently into a grain drying chamber 6 and are recirculated to said natural cooling and reserving chamber 1 to effect double drying in such a manner. In this case, an abnormality is detected when the valve 3 is closed naturally and the on/off valve 3 is controlled automatically so as to be opened whereby the drying becomes double drying. When the circulation of the grains through the natural cooling device is stopped during double drying, the faulty circulation is detected, the double drying is stopped and switched to single drying, in which the grains are circulated through only the hot air drying device 7, whereby the grain drying of single drying, in which the grains drop from the grain drying chamber 5 into the drying chamber 6, is continued.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating an abnormality in an opening/closing valve of a grain dryer.

0002

[Prior Art] Conventionally, during drying in a grain dryer, the grains in the grain cooling storage chamber of the upper cooling device are transported from the grain cooling storage chamber to the grains by opening and closing the opening/closing valve of the cooling collecting trough. The grains flow down and are supplied to the grain storage chamber of the hot air drying device at the bottom of the dryer, and are fed out from this storage chamber to the grain drying chamber, flow down, and supplied to the cooling storage chamber, and the grains are supplied to the cooling storage chamber. By passing hot air into the drying chamber while circulating both the device and the hot air drying device, the grains flowing down the drying chamber are exposed to and dried by the hot air. During this double drying, abnormal closing of the opening/closing valve was detected, and due to this abnormal closing detection, the opening/closing valve was of an abnormality processing method in which no opening operation control was performed.

0003

[Problems to be Solved by the Invention] During drying in a grain dryer, the grains stored in the grain cooling storage chamber of the upper cooling device are transferred from this cooling storage chamber to the cooling collecting gutter. When the on-off valve is open, the grains flow down and are supplied to the grain storage chamber of the hot air drying device at the bottom of the dryer, and are fed from this storage chamber to the grain drying chamber, flow down, and are supplied to the air-cooled storage chamber. By passing hot air into the drying chamber while circulating through both the cooling device and the hot air drying device, the grains flowing down the drying chamber are exposed to and dried by the hot air.

[0004] If the on-off valve spontaneously closes during this drying, the grains being dried will be stored only in the cooling device, making it impossible to dry the grains. Also, since all the grains being dried are supplied into the cooling device, the cooling device may become more than full with grains, which may damage the cooling device. This is what we are trying to prevent from happening.

[0005]

[Means for Solving the Problems] Therefore, the present invention has the following features:
An opening/closing valve 3 opens and closes a cooling collecting trough 2 from the upper grain cooling storage chamber 1 to a lower cooling collecting trough 2. A cooling device 4 which cools the grains in the closed state and a cooling device 4 from the upper grain storage chamber 5 to the lower grain trough 2. In a grain dryer equipped with a hot air drying device 7 for drying grains with circulating hot air that feeds grains into a grain drying chamber 6 and dries them with flowing hot air, the cooling device 4 and the hot air drying device are The on-off valve abnormality processing method is characterized in that the on-off valve 3 is controlled to open based on the detection of abnormal closing of the on-off valve 3 during drying in which both the on-off valve 3 and the on-off valve 3 are circulated for drying.

[0006] Also, during double drying in which both are circulated, the double drying is stopped based on the detection of abnormal closing of the on-off valve 3 and the detection of poor circulation of grains, and single drying is carried out by circulating only the hot air drying device 7. It is configured with an on-off valve abnormality processing system that is characterized by drying by controlling switching to drying.

[0007]

[Operation of the invention] During drying in the grain dryer, the grains stored in the grain cooling storage chamber 1 of the cooling device 4 are removed from the grain cooling storage chamber 1 by opening and closing the cooling collecting gutter 2. When the valve 3 is open, the air flows down and is supplied to the grain storage chamber 5 of the hot air drying device 7 of this dryer, and from this storage chamber 5 it is fed out to the grain drying chamber 6 and flows down to the cooled storage chamber 1. As the hot air passes through the drying chamber 6 while circulating through both the cooling device 3 and the hot air drying device 7, the grains flowing down inside the drying chamber 6 are absorbed by the hot air. exposed to dry.

During this drying, when the on-off valve 3 naturally closes, an abnormality causing this closed state is detected, and this abnormality detection automatically controls the on-off valve 3 to open the grain. dried. Also, if the on-off valve 3 naturally closes during double drying in which both are circulated and dried, an abnormality in this closed state is detected, and if the grains no longer circulate in the cooling device 4. This defective grain circulation is detected, and upon detection of these abnormalities, this double drying is stopped, and the control is switched to single drying in which only the hot air drying device 7 is circulated and dried, and the grains are transferred from the storage chamber 5 to the Drying is carried out by single drying in which the material is fed into the drying chamber 6 and flows downward.

[0009]

Effects of the Invention According to the present invention, the on-off valve 3 of the cooling grain gutter 2 is controlled to be in the open state for double drying in which both are circulated and dried, and this on-off valve 3 is automatically brought into the closed state. Then, this closed state is detected and the on-off valve 3 is automatically controlled to the open state, so that double drying does not become impossible and the grain cooling storage chamber 1 of the cooling device 4 is kept in a full state or more. Therefore, the cooling device 4 is no longer damaged.

[0010] Also, when the closed state in which the on-off valve 3 is naturally closed is detected, or when it is detected that the grains are not circulating in the cooling storage chamber 1, the double drying is stopped. ,
By controlling the switching to single drying, the drying of the grains was continued, and the inability to dry the grains was prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated example shows a grain dryer 8 in which a cooling device 4 for cooling the grains at the top and a hot air drying device 7 for drying the grains at the bottom are installed in a stacked manner. The cooling device 4 and the hot air drying device 7 of this dryer 8 have a rectangular shape that is long in the front and back direction, and the cooling device 4 on the upper part of the machine wall 9 has a cooling transfer spiral 10' rotatably installed in the upper part. A cooling transfer gutter 10 and a cooling ceiling board 11 are provided, and a grain cooling storage chamber 1 for storing grains is formed below the cooling ceiling board 11. Cooling full amount sensor 1 that detects the full state of grains
2.

[0012] At the lower side of the cooling storage chamber 1, there are provided cooling collecting troughs 2, 2 which communicate with the cooling storage chamber 1, and in the cooling collecting trough 2, the cooling grains are collected rotatably. It has a structure in which a grain transfer spiral 13 is installed inside, and diamond-shaped guide plates 14, 14 are provided above the cooling grain troughs 2, 2. Opening/closing valves 3, 3 are provided on the lower side of the cold collecting grain troughs 2, 2 so as to be openable and closable. When the on-off valves 3, 3 are in the open state, the grains in the cooling grain collection troughs 2, 2 are configured to drop and be supplied into the hot air drying device 7 on the lower side, and when the on-off valves are in the closed state,
The grains in the cooling grain troughs 2, 2 are laterally transferred by the cooling grain transfer spiral 13.

Circulation sensors 40, 40 are provided below the cooling grain troughs 2, 2 to detect grains flowing down and circulating through the cooling grain troughs 2, 2. A drying transfer gutter 15 in which a drying transfer spiral 15' is rotatably installed is provided in the center between the cooling grain collecting troughs 2, 2. A grain storage chamber 5 of the hot air drying device 7 is formed below the drying transfer gutter 15, and a drying full amount sensor 17' for detecting the full amount of grains is provided in this storage chamber 5. In addition, on the lower side of this storage chamber 5, there are 3 holes on both left and right sides and in the center.
There are four grain drying chambers 6 between each row of ventilation chambers 17 and the left and right ventilation chambers 18, 18, and the grains are fed out and flowed down into the lower part of each drying chamber 6. Delivery valve 19
is rotatably supported, and each delivery valve 19 is configured to be rotationally driven by a delivery valve motor 20.

[0014] The lower side of each of the drying chambers 6 is configured to communicate with a dry grain collection gutter 22 in which a dry grain collection transfer spiral 21 is rotatably installed. On the front side of the machine wall 9, an air passage chamber 23 that can communicate with each of the air blow chambers 18, 18 is formed;
A burner case 25 containing a burner 24 is detachably attached to the air passage chamber 23, and an operating device 2 for starting and stopping the dryer 8 is provided on the outer surface of the machine wall 9.
6 is detachably provided.

On the back side of the machine wall 9, each of the ventilation chambers 17 is provided.
An exhaust duct chamber 27 is formed which can communicate with the exhaust duct chamber 27.
The central rear side exhaust cylinder 28 is provided with an exhaust fan 29 and an exhaust fan motor 30 for rotationally driving the exhaust fan 29. Each supply port for supplying the transferred grains to the cooling storage chamber 1 and the storage chamber 5 is provided at the center in the front-rear direction of the bottom plate of the cooling/drying transfer gutter 10, 15, and the lower side of each supply port is provided. The cooling/drying diffusion plates 31 and 32 are rotatably provided.

The grain hoisting machine 33 is provided outside on the back side of the machine wall 9, and has a belt with a bucket conveyor 34 stretched inside, and a dispensing tube 35 is provided at the upper end. One side of the tube 35 is in communication with the starting end of the cooling transfer gutter 10, and the other side is in communication with the starting end of the drying transfer gutter 15 via the falling tube 36. is provided with a dispensing switching valve 37 that can be opened and closed freely, and this dispensing switching valve 37 is configured to be opened and closed by forward and reverse rotation of a dispensing motor 38,
When the output switching valve 37 is open, the grains from the grain raising machine 33 are supplied to the cooling transfer gutter 10, and when it is closed, the grains are fed to the drying transfer gutter 15. , a supply gutter 35' is provided between the terminal end of the dry grain collection gutter 22 and communicated therewith, and 39 is a grain raising machine motor, and the grain raising machine motor 39 operates each part of the grain raising machine 33. It is configured to be rotationally driven.

The grain raising machine 33 is provided with a moisture sensor 41 that receives the grains that fall while being conveyed to the upper part by the bucket conveyor 34, crushes the grains under pressure, and simultaneously detects the moisture content of the crushed grains. is provided and is configured to be rotationally driven by a moisture motor 42. A drying discharge funnel 43 is provided on the bottom plate at the starting end of the drying transfer gutter 15, and a discharge switching valve 44 is provided in the drying discharge funnel 43 so as to be openable and closable. It is configured to open and close by rotation, and when the discharge switching valve 44 is closed, the grains from the downflow cylinder 36 are supplied into the storage chamber 5 through the drying transfer gutter 15, and when it is open, it is discharged outside the machine. The drying transfer spiral 15' in the drying transfer gutter 15 is rotationally driven by a drying transfer motor 46.

Cooling discharge funnels 47, 47 are provided at the end portions of the cooling grain collection troughs 2, 2, and the cooling grain transfer spirals 13, 2 are provided with cooling discharge funnels 47, 47.
The grains transferred at step 13 are discharged to the outside of the machine, and the cooling grain transfer spirals 13, 13 are configured to be rotationally driven by a cooling grain motor 48. The structure is such that the grains are not driven to rotate during single drying.

When single drying is performed in the dryer 8, the discharge switching valve 37 of the dispensing tube 35, the discharge switching valve 44 of the drying discharge funnel 43, and the cool collecting grain troughs 2, 2 The opening/closing valves 3, 3 are closed, the cooling collecting grain transfer spirals 13, 13 are stopped, and the grains in the storage chamber 5 are transferred from the storage chamber 5 to each of the drying chambers 6. , the dried grain is transferred and supplied into the grain hoisting machine 33 via the dry grain collecting trough 22 and the supply trough 35', is conveyed to the upper part by the bucket conveyor 34, passes through the dispensing pipe 35, the falling pipe 36, and then passes through the grain raising machine 33. is supplied into the dry transfer gutter 15, and this dry transfer gutter 1
5 onto the drying diffusion plate 32, and the drying diffusion plate 32 uniformly diffuses and supplies the liquid into the storage chamber 5 for circulation and drying.

When double drying is carried out, the discharge switching valve 37 of the discharge pipe 35 and the on-off valves 3 of the cold collecting grain troughs 2, 2 are in the open state, and the drying discharge is The discharge switching valve 44 of the funnel 43 is closed, and the grains in the storage chamber 5 are transferred from the storage chamber 5 to the drying chambers 6, the drying grain collection gutter 22, and the supply gutter 35'. grain raising machine 3
3, conveyed to the upper part by the bucket conveyor 34, supplied from the discharge tube 35 into the cooling transfer gutter 10, and from the cooling transfer gutter 10 to the cooling diffusion plate 3.
1, and is evenly distributed and supplied into the cooling storage chamber 1 by this cooling diffusion plate 31, and from this cooling storage chamber 1 through the cooling cooling collecting troughs 2, 2, into the storage chamber 5. The structure is such that the drying process is carried out through circulation.

When cooling is performed, the dispensing tube 35
The discharge switching valve 37 of the cooling collecting grain trough 2, 2 and the discharge switching valve 44 of the drying discharge funnel 43 are closed. The cold grain transfer spiral 13 is in a stopped state, and the dried grains in the storage chamber 5 are transferred from the storage chamber 5 to the drying chambers 6, the dry grain collection gutter 22, and the supply gutter 35'. The grains are transferred and supplied into the raising machine 33, transported to the upper part by the bucket conveyor 34, supplied from the dispensing tube 35 into the cooling transfer gutter 10, and from the cooling transfer gutter 10 to the cooling diffusion plate 31. The air is supplied upward, is evenly distributed and supplied into the cooling storage chamber 1 by the cooling diffusion plate 31, and is allowed to cool within the cooling storage chamber 1.

The operating device 26 is box-shaped, and on the surface plate of the box, various parts of the dryer 8, the burner 24, the moisture sensor 41, etc. are installed, and the operating device 26 is operated for each operation of discharge and cooling. Each start switch 49 to be operated, single start switch 50 to be operated separately for single drying and double drying.
, a double start switch 51, a stop switch 52 for stopping operation, a moisture setting knob 53 for setting the finishing target moisture of grains according to the operating position, and a grain type setting knob for setting the temperature of the hot air generated from the burner 24 according to the operating position. 54 and a pressure setting knob 55, and the surface plate is provided with a digital display section 56 and a monitor, etc., which alternately digitally display detected grain moisture, detected drying temperature, remaining drying time, etc. There is.

The moisture sensor 4 is located inside the operating device 26.
1. The detected values detected by the hot air temperature sensor 57 that detects the temperature of the hot air in the ventilation chamber 18 and the overcurrent detection devices 57' that detect the overcurrent of the on-off valve motors 16, 16 are expressed as A-
An A-D converter 58 that performs D conversion, an input circuit 59 into which the converted value converted by the A-D converter 58 is input, the switches 49, 50, 51, 52, and the setting knobs 53, 54,
55 and the cooling/drying full sensor 12, 17'
and an input circuit 60 into which the detections detected by each circulation sensor 40 are input, and a C which performs arithmetic and logical operations, comparison operations, etc. on various input values input from these input circuits 59 and 60.
A drying control device 63 consisting of a PU 61, an output circuit 62 that receives various commands from the CPU 61, and outputs them.
It has a built-in configuration. In addition, the settings 53, 54, 55
is a rotary switch type, and has a configuration in which predetermined values, types, etc. are set depending on the operating position.

The drying control by the drying control device 63 is as follows:
The configuration is performed as follows. That is, the double start switch 51 that starts double drying is operated, the content of this operation is input to the CPU 61, each part of the dryer 8 is started by this input, and the grains in the storage chamber 5 are double dried. The structure is such that drying starts. As shown in FIG. 2, double drying is started (step 101), and the cooling full amount sensor 12 detects that the grains in the cooling storage chamber 1 are in a full state, which is input to the CPU 61 (step 101). 102) When it is detected and input that the grains in the cooling storage chamber 1 are in a full state even after a predetermined period of time has elapsed (step 103), the on-off valves 3, 3 are automatically closed. (Step 104), and upon this detection, the CPU 61 controls the on-off valve motors 16, 16 to rotate in the forward direction, and the on-off valves 3, 3 are controlled to be in the open state (Step 1).
05). When it is detected that the grain moisture detected by the moisture sensor 41 has reached the finishing target moisture set by operating the moisture setting knob 54 (step 106), the dryer 8 is automatically stopped. This is a configuration in which double drying is stopped (step 107). Further, when the cooling full amount sensor 12 does not detect the full state of grains in the cooling storage chamber 1, double drying is continued (step 1).
08).

As shown in FIG. 3, double drying is started (step 201), and the cooling full amount sensor 1 is
2, it is detected that the grains in the cooling storage chamber 1 are in a full state and input to the CPU 61, or the circulation sensors 40, 40 detect that the grains in the cooling storage chamber 1 are full It is detected that the water does not flow down and is input to the CPU 61 (step 2).
02), even after a predetermined period of time has elapsed, it is detected that the grains in the cooling storage chamber 1 are full, or the grains in the cooling storage chamber 1 are detected to be full, or
2 when it is detected that the grains do not flow down and is input (step 203), it is detected that the on-off valves 3, 3 are automatically closed (step 204), and as a result of this detection, the The dryer 8 is switched to a single drying configuration in which the grains are dried by circulating only the hot air drying device 7 (step 205). Single drying is started (step 206), and when it is detected that the grain moisture detected by the moisture sensor 41 has reached the finishing target moisture set by operating the moisture setting knob 54 (step 207), The dryer 8 is configured to be automatically stopped and single drying is stopped (step 208). Also, when the cooling full amount sensor 12 does not detect the full state of grains in the cooling storage chamber 1, or when the circulation sensors 40, 40 detect the grain in the cooling collecting trough 2,
2, when it is detected that grains are flowing down, double drying is continued (step 209).

As shown in FIG. 4, when the double drying is completed, the on-off valves 3, 3 are controlled to close (step 301), and during this closing control, if the load on the on-off valve motors 16, 16 is overloaded, , this overload causes the overcurrent detection devices 57', 5
7' and is input to the CPU 61 (step 302), and this input controls the on-off valves 3, 3 to open (step 303), and at the same time as this opening control, the cooling grain transfer spirals 13, is controlled to rotate in reverse (step 30).
4), the load on the on-off valve motors 16, 16 is detected again and no load is detected (step 305), and when this no-load state is detected for a predetermined time set and stored in the CPU 61 (step 306). ), the on-off valves 3, 3 are controlled to close (step 307), the load on the on-off valve motors 16, 16 is detected during this closing control, and when no load is detected (step 308), this no-load is detected. This is a configuration in which a work operation other than single drying or double drying is performed based on load detection (step 309). Further, when it is detected that the load of the on-off valve motors 16, 16 detected in step 305 is overload, the dryer 8 is automatically stopped (step 310), and at the same time as this stop control, the dryer 8 is automatically stopped. The structure is such that an abnormality is displayed on the display unit 56 (step 311).
).

As shown in FIG. 5, during duffle drying (step 4
01), when switching to single drying due to an abnormally closed state of the on-off valves 3, 3, etc. occurring during this double drying, (
Step 402) When the grain moisture detected by the moisture sensor 41 at the time of this switching is equal to or higher than the predetermined moisture set and stored in the CPU 61 (Step 403), the cooling storage chamber of the cooling device 4 The grains remaining in the cooling storage chamber 1 are ventilated and dried (step 404). Further, when the detected grain moisture is below a predetermined moisture content, the grains remaining in the cooling storage chamber 1 are configured to be left still in the cooling storage chamber 1. The grains are dried in a single hot air manner (step 405).

As shown in FIG. 6, during double drying (step 50)
1) When switching to single drying due to an abnormally closed state of the on-off valves 3, 3, etc. occurring during this double drying (step 502), the moisture sensor 4 at the time of this switching
When the grain moisture detected by dryer 1 is equal to or higher than a predetermined moisture content set and stored in the CPU 61 (step 503), another empty dryer 8 (not shown) is selected (step 504). The high-moisture grains remaining in the cooling device 4 are supplied to the selected empty dryer 8 and dried (step 505). Further, when the detected grain moisture is below a predetermined moisture content, the grains remaining in the cooling storage chamber 1 are configured to be left still in the cooling storage chamber 1. The grains are single-dried with hot air (step 506).

Additionally, the drying control device 63 has the following functions. That is, the operation of the moisture setting knob 53 is
The moisture content of the grains detected by the moisture sensor 41 is also input to the CPU 61, and the detected grain moisture content is compared with the target moisture content of the finished grains. When the grain reaches the finishing target moisture content, the dryer 8 is automatically controlled to stop drying the grains.

Furthermore, the set hot air temperature and the hot air temperature sensor 57
The hot air temperature detected by the hot air temperature is compared, and if there is a difference, the combustion fuel is controlled to be increased or decreased so that the temperature becomes the same as the set hot air temperature. Hereinafter, the operation of the above embodiment will be explained. When double-drying the grains housed in the grain dryer 8, the setting knobs 53 and 54 of the operating device 26 are used.
, 55 to a predetermined position and the double start switch 51 which starts double drying, the dryer 8
At the same time as each part of the
The discharge switching valve 37 of the drying discharge funnel 43 is controlled to be open, and the discharge switching valve 44 of the drying discharge funnel 43 is controlled to be closed, thereby starting double drying.

The hot air generated from the burner 24 flows from the air duct chamber 23 through the air duct chambers 18 , 18 , through each grain drying chamber 6 , through each exhaust chamber 17 and the exhaust duct chamber 27 , and then to the exhaust fan 29 .
The grains stored in the grain cooling storage chamber 1 of the cooling device 4 are transported from the cooling storage chamber 1 through the cooling collecting troughs 2, 2 to the hot air drying device. The grains are supplied falling into the grain storage chamber 5 of No. 7, and are exposed to this hot air and dried while flowing down from this storage chamber 5 into each grain drying chamber 6, and are delivered to the lower part by each drying delivery valve 19. Flowing down, drying grain collection gutter 22
From the dry grain collecting trough 2 to the grain raising machine 33 via the supply trough 35'.
The dried grains are transferred and supplied by the transfer spiral 21 in 2, are conveyed to the upper part by the bucket conveyor 34, are supplied to the cooling transfer gutter 10 via the dump tube 35, and from the cooling transfer gutter 10 to the cooling diffusion plate. 31 up this cooling transfer spiral 1 in this cooling transfer gutter 10
0', is uniformly diffused and returned into the cooling storage chamber 1 by the cooling diffusion plate 31, and is circulated and dried. When the finishing target moisture level set by the operation is reached, the dryer 8 is automatically stopped under automatic control by the drying control device 63 of the operating device 26, and the drying of the grains is stopped.

During this double drying operation, the cooling full amount sensor 12 in the cooling storage chamber 1 of the cooling device 4 detects that the cooling storage chamber 1 is full of grains. When this detection continues for a predetermined period of time or more, it is detected that the on-off valves 3, 3 that open and close the cold collecting grain troughs 2, 2 are in the closed state, and as a result of this detection, the on-off valves 3 , 3 are controlled to be open and double drying continues.

During this double drying operation, when the inside of the cooling storage chamber 1 becomes full of grains, the cooling full amount sensor 1 is activated.
2, or when the circulation sensors 40, 40 detect that the grains are not flowing down the cooling collecting grain troughs 2, 2, this double drying is stopped and the drying is changed to single drying. Each part of the machine 8 is switched and controlled, and the grains in the storage chamber 5 are
From this storage chamber 5 to each of the drying chambers 6 and to the dry grain collecting trough 22
, is transferred and supplied into the grain raising machine 33 through the supply gutter 35', is conveyed to the upper part by the bucket conveyor 34, and is supplied into the drying transfer gutter 15 via the dispensing pipe 35 and the falling pipe 36. It is transferred and supplied from the drying transfer gutter 15 onto the drying diffusion plate 32 by the drying transfer spiral 15', and this drying diffusion plate 32
Then, it is evenly diffused and reduced into the storage chamber 5 and circulated to be dried single.

[Brief explanation of drawings]

The figure shows one embodiment of the invention.

[Figure 1] Block diagram

[Figure 2] Flowchart

[Figure 3] Flowchart

[Figure 4] Flowchart

[Figure 5] Flowchart

[Figure 6] Flowchart

[Figure 7] Overall side view of grain dryer

[Fig. 8] Enlarged sectional view taken along line A-A in Fig. 7

[Figure 9] B-B enlarged sectional view in Figure 7

FIG. 10: Enlarged perspective view of a portion of the grain dryer

[Figure 11] Enlarged front view of part of the grain dryer

[Figure 12] Enlarged partially cutaway front view of grain dryer

[Explanation of symbols]

1 Grain cooling storage chamber 2 Cooling grain collection gutter 3 On-off valve 4 Cooling device 5 Grain storage room 6 Grain drying room 7 Hot air drying equipment

Claims (2)

[Claims] [Claim 1] A cooling device 4 that allows grains to cool while the open/close valve 3 is closed to open and close a cooling collection trough 2 from an upper grain cooling storage chamber 1 to a lower grain cooling collection trough 2, and an upper grain storage chamber. In the grain dryer equipped with a hot air drying device 7 for drying the grains with circulating hot air that feeds the grains from the lower grain drying chamber 6 to the lower grain drying chamber 6, the on-off valve 3
The opening/closing valve 3 is controlled to open based on detection of abnormal closing of the opening/closing valve 3 during drying in which both the cooling device 4 and the hot air drying device 7 are circulated in the open state. An on-off valve abnormality handling method. [Claim 2] A cooling device 4 that allows grains to cool while the on-off valve 3 opens and closes the kernels from the upper grain cooling storage chamber 1 to the lower grain cooling collection trough 2 in the closed state, and an upper grain storage chamber. In the grain dryer equipped with a hot air drying device 7 for drying the grains with circulating hot air that feeds the grains from the lower grain drying chamber 6 to the lower grain drying chamber 6, the on-off valve 3
During double drying, in which both the cooling device 4 and the hot air drying device 7 are circulated in the open state, the double drying is performed based on detection of abnormal closing of the on-off valve 3 or detection of poor circulation of grains. The on-off valve abnormality processing method is characterized in that drying is performed by switching to single drying in which only the hot air drying device 7 is circulated and dried.