JP2004263921A - Grain drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a bottom valve opening mechanism of an upper transfer device in a grain drier; and to smooth its operation. <P>SOLUTION: A bottom valve 57 opens-closes a bottom part by rotating around a shaft run in the grain feeding direction, and is arranged in the bottom part of a transfer gutter 17 for internally installing a grain feeding mechanism such as a transfer spiral 46. An abutting member 60 is vertically rotatably arranged around an operation shaft 59 arranged in parallel to a rotary shaft of the bottom valve on the lower side of this bottom valve 57, and is constituted for supporting the bottom valve in a closing attitude in a rising position, and in an opening attitude in a lowering attitude. The abutting member has a radial part 60a of a distance up to the bottom valve of closing the bottom part from the operation shaft 59, and a contact part 60b contacting with a bottom valve NI line of the closing attitude by extending in the substantially orthogonal direction from this radial part. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a grain dryer provided with a transfer device as a transporting means for sticking grains into a storage room.
[0002]
[Prior art]
Conventionally, the bottom valve of the upper transfer spiral of the grain dryer is configured to be able to open and close in order to discharge the remaining grain. That is, for example, as in Patent Literature 1, a link mechanism is connected to a control motor that opens and closes a discharge shutter that discharges grains after predetermined drying, and a locking member that receives a bottom valve is interlockingly connected to an end of the link mechanism. There is a technology of a configuration that performs opening and closing rotation of a bottom valve.
[0003]
Further, as a countermeasure for preventing noise due to grain collision, there is a countermeasure such as Patent Literature 2 in which an inner peripheral surface of a storage chamber is provided with a soundproofing structure so as to consider noise to the surroundings.
[0004]
[Patent Document 1]
JP-A-11-201644 [Patent Document 2]
Japanese Patent Application Laid-Open No. Hei 9-138072
[Problems to be solved by the invention]
However, according to the configuration of Patent Document 1, the self-weight of the bottom valve is supported by the locking member, and the bottom valve is rotated by using its own weight by releasing the locked state. Opening operation is possible by power, but since the link mechanism is linked to the bottom valve, the grains are deposited in a full state and opened and closed in a state approaching the bottom valve, especially when opening and rotating Excessive resistance acts on the bottom valve and is transmitted to the control motor via the link mechanism, so that the control motor cannot operate and there is a risk of damage to the device.
[0006]
As a countermeasure against noise at night, there is a reduction measure by reducing the speed of the suction fan. However, it is necessary to construct a special soundproof wall in order to effectively reduce noise when grains are diffused and dropped into the storage room.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has taken the following technical measures.
That is, the invention according to claim 1 is that a bottom portion of a transfer device having a grain feeding mechanism such as a transfer spiral is pivoted around an axis along the grain feeding direction to open and close the bottom portion. A bottom valve is provided, and a contact member is provided below the bottom valve so as to be rotatable up and down around an operating axis provided in parallel with the rotation axis of the bottom valve. A grain that is configured to support the bottom portion in a closed position, receive the lower surface of the bottom valve in a lowered position and support the bottom portion in a predetermined open position, and provide an opening / closing mechanism for rotating a contact member around an operation axis. It has the configuration of a granulated dryer.
[0008]
When the bottom member is received by the contact member and the bottom is closed, the bottom valve rotates downward around the hinge portion when the contact member rotates downward around the operating axis by the operation of the opening / closing mechanism. It moves and discharges grains and remaining grains during transfer from the bottom opening. Further, the bottom portion is returned to the original closed state by the operation of the opening / closing mechanism.
[0009]
According to a second aspect of the present invention, in the above configuration, the contact member extends in a substantially perpendicular direction from a radius portion of a distance from the operating shaft to the bottom valve in a posture in which the bottom portion is closed and the closed position. And a contact portion that makes linear contact with the lower surface of the bottom valve.
Thereby, when the bottom valve switches from a state in which the bottom is closed to a state in which the bottom is opened, from a state in which the bottom of the line contacts the contact portion of the contact member, the rotation of the operating shaft rotates about the hinge portion center, and a radius portion At the point of contact at the junction between the contact point and the contact portion.
[0010]
According to a third aspect of the present invention, a bottom valve for opening and closing the bottom of a transfer gutter provided above a storage chamber of a grain dryer and containing a grain feeding mechanism such as a transfer spiral and opening and closing the bottom is provided. An opening / closing mechanism that interlocks with the control unit is provided, and the control unit is configured with input means for switching to each mode of grain filling, drying, discharging, etc., and driving each unit. The opening and closing mechanism is configured to output an open output so as to open the bottom valve.
[0011]
Thereby, at the time of the filling operation, the bottom valve in the middle of the grain transfer by the upper transfer device is opened and the grain falls from the position into the storage chamber, and the grain does not go to the diffusion plate at the end of the transfer device, Therefore, there is no scattering of grain to the wall of the storage room.
The invention according to claim 4 is a bottom valve that opens and closes a bottom portion of a transfer gutter provided above a storage chamber of a grain dryer and that incorporates a grain feed mechanism such as a transfer spiral, and that opens and closes the bottom valve. An opening / closing mechanism is provided so as to interlock, and the control unit is configured to receive a detection signal from the grain moisture meter. When the moisture detection signal falls below a predetermined moisture value, the opening / closing mechanism is opened to open the bottom valve. It is configured to
[0012]
Therefore, when the drying proceeds during the drying operation and the grain is dried and the water content becomes equal to or less than a predetermined moisture value, the bottom valve is opened and the grain is dropped directly from the bottom opening portion of the upper transfer device into the storage chamber.
[0013]
【The invention's effect】
According to the first aspect of the present invention, when the contact member rotates upward and downward around the operating axis by the operation of the opening and closing mechanism, the bottom valve rotates upward and downward around the hinge portion to transfer the grain. To transfer the grains and the remaining grains during the transfer from the bottom opening, so that the contact member is not directly connected to the bottom valve and the weight of the bottom valve is supported. Even if resistance acts on the operation of the bottom valve, there is no danger that the opening and closing mechanism is cut off and the opening and closing mechanism is damaged.
[0014]
According to the second aspect of the present invention, the bottom valve is rotated around the hinge portion by the rotation of the operating shaft from a state in which the bottom valve is in linear contact with the contact portion of the contact member, thereby connecting the radius portion and the contact portion. Since the bottom valve is brought into contact with the bottom valve and changes to a state in which the bottom valve is received, the bottom valve is in line contact in the closed state and withstands a large load, and can smoothly operate by point contact during the opening operation.
[0015]
In the invention according to claim 3 and the invention according to claim 4, the transported grains during the filling work or the drying work are dropped directly from the bottom opening portion of the upper transfer device into the storage chamber and diffused into the storage chamber wall by diffusion. The noise can be reduced by eliminating the grain collision sound. In particular, during the drying operation, the above operation is performed when the drying proceeds and the collision sound is relatively high when the moisture value is equal to or less than the predetermined value. It is hard to cause drying unevenness by dropping.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a machine frame of a grain drying apparatus, in which a storage chamber 2, a drying chamber 3, and a grain collecting chamber 4 are stacked in this order, and the grain is circulated by driving an elevator 5 provided outside to form a frame in a grain collecting chamber 4 part. The heat radiation from the provided far-infrared radiator 6 and the exhausted heat from the far-infrared radiator 6 are applied to dry.
[0017]
The far-infrared radiator 6 is located inside the grain collecting chamber 4, one end of which is connected to the burner 7, has a rectangular cross-section, and is coated with far-infrared radiation paint on left and right walls and a lower surface. The grain flowing down the surface of the grain falling plate 8 is exposed to far-infrared radiation heat. The hot exhaust air from the upper surface of the far-infrared radiator 6 flows from the hot air chambers 9a, 9b, 9b in the upper drying chamber 3 to the exhaust air chambers 10, 10 while mixing with the outside air introduced from the rear and front sides of the body. Are formed so as to cross the grain passages 11, 11,. Note that the suction fan 12 is provided on the back side of the drying chamber 3 so as to contribute to the hot air flow, which is the same as the known configuration. The hot air in the central hot air chamber 9a is supplied to the left and right hot air chambers 9b, 9b via a duct 13 on the rear of the machine body. Numeral 14 denotes a roof-type dust plate disposed above the far-infrared radiator 6, which prevents the dust from falling from the upper side to the radiator 6 and, at the same time, mixes the above-mentioned mixed wind of the exhaust air with the outside air on the left and right sides. It is a guide part that guides upwards, bypassing from.
[0018]
Numerals 15 and 15 denote a predetermined amount of cereal flowing down while rotating in a forward / reverse direction with a delivery valve. Reference numeral 16 denotes a lower transfer device connected to the elevator 5, and reference numeral 17 denotes an upper transfer device connected to the upper side of the lift 5, which can supply grains to a diffusion plate 18 above the storage chamber 2. The burner 7, the grain circulation mechanism, and the like are performed by a computer including a memory that stores a control program necessary for drying control, various data, and the like. That is, the operation panel 19 is provided with a display section 20 in the form of a liquid crystal, and along the lower edge of the display section 20, each of five push button-shaped mode switches 21 to 25 for setting, ventilating, drying, discharging and stopping. Is arranged. In addition to these switches, a setting switch 26, a drying setting switch 27 corresponding to a grain type, a stop moisture setting switch 28, and the like are provided. 29 is an emergency stop switch.
[0019]
The built-in control unit 31 receives the switch information on the operation panel 19 and the detection information from the sensors disposed in each part of the dryer frame 1 and performs a necessary comparison operation to control the burner combustion amount and the grain. It performs start / stop control of the circulatory system, control of display contents of the display unit 20, and the like. The switches of the operation panel 19 can set the grain type, the set moisture (finished moisture), the filling amount, the timer increase / decrease, and the like, in addition to the setting of the filling, ventilation, drying, discharging, and ventilation.
[0020]
FIG. 5 shows a control block diagram. In addition to the setting information from the switches, the arithmetic control unit 31 of the computer built in the control box having the operation panel 19, the moisture meter 32 detection information, and the ejection unit of the elevator 5 The grain detection information of the grain flow detector 33 to be provided, the detection information of the hot air temperature detector provided in the hot air chamber 8, the detection information of the outside air temperature detector 34, the detection information of the outside air humidity detector 35, the temperature near the grain flow down plate 8 Detection information of the detector 36 and the like are input. On the other hand, as the output information, a combustion system 37 signal of the burner 7, for example, a fuel supply signal, a flow rate control signal thereof, or each of the transfer spirals of the vertical transfer devices 15, 16; There are a control signal for the delivery valve motor 38 / elevator drive motor 39, a control signal for the suction fan 12 motor, a display output to each display unit 20, and the like.
[0021]
The lift 5 is of a bucket type, and has a structure in which a number of buckets 41, 41,... Are attached to an endless belt 40, and the outer periphery is covered by a side wall 5a. It is a structure to carry to 2. The front edge of an unillustrated grain take-in portion of the single-grain moisture meter 32 is inserted and installed near the bucket 41 of the endless belt for bucket 40 on the front inside of the side wall 5 a of the elevator 5, and inside the side wall 5 a, Look down at the beginning of the grain feed spiral (not shown) below the grain intake section.
[0022]
The moisture meter 32 is provided with a pair of electrode rolls, and is configured to convert the electrical resistance value into a moisture voltage and calculate a moisture value while crushing grains one by one. The control section is configured to output an average moisture value by averaging the converted moisture value of a predetermined number of grains, and to perform various drying controls or display output.
[0023]
The temperature detector 36 in the vicinity of the grain falling plate 8 is constituted by a thermistor type temperature sensor 42 attached to the back surface of the left and right grain falling plates 8, 8 and attached to the front and rear center. In other words, it is configured to be mounted on the back side of the grain guide plate 8 located on the upper side of the double plate body to form the ventilation space 43 into which the outside air can be introduced as appropriate. Therefore, the left and right sides are independently detected and output every predetermined time T ₀ (for example, one minute), and the rise value (T _n −T _{n) obtained} by comparing the current temperature detection value T _n with the previous temperature detection value T _{n−1. n-1} ) is _{equal to} or higher than a predetermined temperature δ (for example, 2 ° C.) and is continuously detected n times (for example, 2 times) or when the detected temperature exceeds a predetermined limit value (for example, 100 ° C.). It is determined that the grain is clogged due to abnormal rotation of the valve 15 and the like, and a stop output is output to each part (FIG. 8B). When the increase value is equal to or less than a predetermined value and less than a predetermined limit value, it is determined that the normal operation is performed. (FIG. 8 (a) or (c)). The temperature detector 36 is provided with the above-mentioned thermistor type temperature sensor at the front and rear centers of the left and right grain falling plates 8, 8, and is installed at the front and rear, and the average value of the front and rear sensors is defined as T _n or T _n−1. Is also good.
[0024]
An opening 45 is provided at the transfer start end outside the dryer frame of the upper transfer device 17, and a discharge shutter 48 that is rotatable around a support shaft 47 in a direction coinciding with the direction of the spiral 46 is provided in the opening 45. . A control plate 49 is integrally provided at one end of the support shaft 47, and the control plate 49 is configured to be switched to two positions by a fulcrum spring 50 around the support shaft 47. The control motor 52 is switched to the above-mentioned two positions in accordance with the rotation of the control motor 52 in a certain direction (a). Positioning at each of the two positions is performed by a contact state in which the opening 45 of the discharge shutter 48 is closed and a contact state of the discharge shutter 48 with the stopper 53. Reference numeral 54 denotes a non-contact type sensor provided on the control plate 49, which can detect which of the two positions has been reached by operating the control motor 52 by approaching sensors 55 and 56 provided on the fixed machine frame side. The control of the control motor 52 is stopped.
[0025]
In the dryer frame of the upper transfer device 17, a bottom valve 57 covering the lower surface of the upper transfer device 17 is connected to a side plate portion of the upper transfer device 17 with hinges 58, 58. The bottom of the transfer device 17 is openable and closable. The configuration for maintaining the open / close attitude of the bottom valve 57 is such that an L-shaped contact supporting a plurality of locations (two locations in the illustrated example) on the lower surface of the bottom valve 57 is supported by an operating shaft 59 along the longitudinal direction. The receiving member 60 is configured to switch between a closed position and an open position. That is, the operating shaft 59 is configured to extend the support shaft 47 of the discharge shutter 48 so as to rotate integrally, and as the operating shaft 59 moves up and down, supports the lower surface of the bottom valve at the ascending position to support the bottom valve. In the closed position, and receives the lower surface of the bottom valve in the lowered position to support the bottom at a predetermined open state. This opening / closing operation is interlocked with the opening / closing mechanism of the discharge motor 48 such as the control motor 52, the control plate 49, the fulcrum spring 50, and the link 51, and has a common opening / closing mechanism.
[0026]
The contact member 60 has a radial portion 60a extending from the operating shaft 59 to the bottom valve 57 having a closed bottom portion, and extending from the radial portion 60a in a direction substantially orthogonal to the bottom valve 57 having the closed position. And a contact portion 60b that is in line contact with the lower surface of the L-shaped portion. Therefore, in the open position, the bottom valve 57 is received in a point contact state at the connecting portion between the radius portion 60a and the contact portion 60b. As shown in FIG. 12, the operating shaft 59 is hollow, and its front end is connected to the support shaft 47 coaxially with a pin 61 by a pin 61. The contact member 60 penetrates the operating shaft 59 and fastens the screw base 60c to the operating shaft 59 with nuts 62 from above and below. 63, 63 are reinforcing and fixing devices.
[0027]
A discharge funnel 64 is connected to the side wall of the upper transfer device 17 so as to cover the discharge shutter 48, and a discharge chute (not shown) is provided ahead of the discharge funnel 64. 80 is an upper transfer device drive pulley.
The operation of the above example will be described.
[0028]
By operating the setting switch 21 and using the elevator 11 from the setting hopper, a predetermined amount of grains is set in the storage room 2. Next, the drying operation is started by setting the grain type, the finish moisture and the like. When the drying switch 23 is turned on, the burner 7 is activated, and the circulation of the delivery valves 15, 15, the lower transfer device 16, the lift 5, the upper transfer device 17 and the diffusion plate 18 is started by the activation of the delivery valve motor 38 and the elevator drive motor 39. The system is started, and the suction fan 12 is driven to rotate. Accordingly, the burner hot air heats the far-infrared radiator 6 to emit far-infrared rays, and the rotation of the delivery valve 15 irradiates far-infrared rays to the grains flowing down the inclined passage 11 to act on moisture inside the grains. Promotes drying.
[0029]
In addition, the waste hot air flowing through the inside of the machine frame 1 due to the blast of the suction fan 12 is appropriately mixed with the outside air, supplied to the hot air chambers 9a, 9b, and 9b, and dried by acting on the grains passing through the drying chamber. . Thus, the grain is dried by traversing the waste hot air and irradiating far infrared rays, and this drying is repeated until the grain reaches a predetermined moisture value.
[0030]
When the above-mentioned predetermined moisture value is reached, the drying is automatically terminated, and the operation of the burner and other components is stopped. After that, the discharge switch 24 is turned on to discharge the dried grains outside the machine. The discharge valve 24 signal activates the delivery valve motor 38 and the elevator drive motor 39, and also activates the control motor 52. The rotation of the control motor 52 in the direction of the arrow (a) is achieved by rotating the control plate 49 clockwise around the support shaft 47 in FIG. Turn clockwise. The clockwise rotation of the control plate 49 interlocks the discharge shutter 48 to open the opening 45. Incidentally, the discharge shutter 48 comes into contact with the stopper 53 and stops, and receives the action of the spring 50 to maintain its posture, and detects the posture by the opposition of the sensor 54 and the sensor 55 to turn off the control motor 52. . Since the opening 45 is opened by switching the position of the discharge shutter 48 in this manner, the dried kernels transferred through the delivery valve 15, the lower transfer device 16, the elevator 5 and the upper transfer device 17 are discharged from the opening 45 through the outside machine. Is discharged.
[0031]
The operation shaft 59 rotates in conjunction with the operation of the discharge shutter 48, and the bottom valve 57 is opened and operated in conjunction with the contact member 60. That is, the bottom valve 57 rotates from the state where the contact portion 60b of the contact member 60 makes line contact (solid line in FIG. 12) to the center of the hinge 58 by the rotation of the operating shaft 59, and the radial portion 60a and the contact portion 60b The state changes to a state (dotted line in FIG. 12) in which the bottom valve 57 is received by point contact at the connecting portion of. For this reason, the grains that have stagnated on the bottom valve 57 surface of the upper transfer device 17 fall into the storage chamber 2.
[0032]
As described above, the contact member 60 changes its position in conjunction with the rotation of the operating shaft 59 and changes the bottom valve 57 between the closed position and the open position. However, the contact member 60 and the bottom valve 57 are not connected to each other, and the bottom valve 57 is not connected. The valve 57 is supported by its own weight, and the supporting state is the line contact state in the closed position and the point contact state in the open position as described above. , The opening and closing operation is smooth. Further, for example, when the kernel is deposited up to the lower surface of the bottom valve 57, the bottom valve 57 is prevented from turning to the open state by the resistance of the kernel. In such a case, the bottom valve 57 contacts the bottom valve 57. If the member 60 is in the connected state, the bottom valve 57 may be forcibly opened to cause damage to the opening / closing mechanism of the control motor 52 or the like. , The contact member 60 can be independently rotated, and since the contact member 60 is constituted by the pin member, it is easy to enter the deposited kernel. As a result, there is no effect on the operation of the discharge shutter 48.
[0033]
Reference numeral 65 denotes a discharge chute provided at one end of the bottom valve 57 for discharging grains from the transfer end of the upper transfer device 17 to the surface of the diffusion plate 18. When the bottom valve 57 is opened and closed, the posture of the chute 65 can be changed so as to eliminate grains accumulated at the joint of the chute 65 and the bottom valve 57.
[0034]
In the above-described embodiment, the operating shaft 59 supporting the opening / closing contact member 60 of the bottom valve 57 is configured to rotate integrally and coaxially with the support shaft 47 of the discharge shutter 48. An opening and closing mechanism may be provided for each of them (FIG. 13). The opening / closing mechanism is not limited to the above embodiment, and the rotating operating shaft 59 is directly and reversely operated by the forward and reverse rotation motor 70 via the control panel 68 and the link 69, and the contact members 60, 60 May be moved to open and close the bottom valve 57.
[0035]
If the opening and closing mechanisms are separately configured as described above, the bottom valve 57 can be configured as follows to prevent noise. A method for preventing noise during grain loading and drying will be described. In FIG. 14, when the insertion switch 21 is turned on, the elevator and the upper transfer device 17 are driven, the inserted kernel is inserted into the storage chamber 2, and the suction fan 12 is also operated. When the operation enters the setting mode in which the setting switch 21 is operated, the control motor 70 is rotated forward so as to open the bottom valve 57. When the bottom valve 57 continues to be open for a predetermined time (10 minutes in the illustrated example), the control motor 70 rotates reversely and closes the bottom of the upper transfer device with the bottom valve 57. In this way, the bottom valve 57 is opened for a predetermined time after the start of the filling, and the set kernels are stuck into the storage room without passing through the diffusion board. Noise can be reduced by eliminating the impact sound caused by the particle collision. In addition, if the bottom valve 57 is opened for a predetermined time or more, the stored grains may be biased, and the amount of stuffed grains may be restricted. Therefore, the above-described bottom valve 57 should be opened for an arbitrary time. Thus, the above disadvantages can be solved.
[0036]
When the drying switch 23 is turned on to enter the drying mode, each part of the grain circulation system is driven, and the suction fan and the burner are also driven to dry the grains. During this drying operation, the moisture is measured using the grains sampled from the elevator 5 at predetermined intervals. When the measured grain moisture value falls below a predetermined moisture value (for example, 20%) due to progress of drying or additional drying or the like, the control motor 70 is rotated forward to open the bottom valve 57. The impact sound accompanying the diffusion from the relatively low-moisture grains to the storage chamber wall tends to show a high noise value. However, when the water content is lower than the predetermined moisture value as described above, the bottom valve 57 is opened. And noise can be reduced (FIG. 14).
[0037]
In FIG. 15, when the drying operation is performed at night, noise countermeasures are important. Therefore, the surrounding brightness is determined by the detection of an optical sensor (not shown), and the detected value is determined to be dark. In this case, the control motor 70 is rotated in the normal direction to open the bottom valve 57, thereby eliminating the grain collision noise and preventing the noise to the surroundings.
[0038]
FIG. 16 shows a state in which dew condensation hardly occurs inside and outside the side wall of the storage chamber by detecting the ambient humidity during the drying operation and opening the bottom valve 57 when the detected value is less than the predetermined moisture value (less than 75% in the example in the figure). The noise below can be prevented.
FIG. 17 shows the installation configuration of the humidity detector 71. In a control box 72 provided with the control panel 19 on the front wall, various transformers 73 and 74, various relays 75 and 76, a CPU board 77, and the like are provided. Have been. The humidity detector 71 has a detection unit attached to a wall 72a separated from the transformer group in a separate room. Conventionally, it is better to install a humidity detector inside the control box to protect the detection unit and reduce the wiring cost. However, as described above, the transformer group that easily generates heat is isolated by the partition wall 78, and the humidity detector 71 is provided on the wall of the control box 72 on the opposite side. Since the humidity detector 71 is far from the heat generating part and the control box 72 is provided in a vertical position, the heat is diffused upward and has little influence on the installation part of the humidity detector 71. Humidity can be detected. The same effect can be obtained by providing an outside air temperature detector instead of or in addition to the humidity detector 71. 79 is a power supply connector.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a grain dryer.
FIG. 2 is a side sectional view of a grain dryer.
FIG. 3 is a plan sectional view of the grain dryer.
FIG. 4 is a front view of a control panel.
FIG. 5 is a control block diagram.
FIG. 6 is a front sectional view showing an example of hot air temperature detector installation.
FIG. 7 is a plan view of the same.
FIG. 8 is a graph showing a relationship between a combustion amount and a detected temperature difference.
FIG. 9 is an enlarged side view of the upper transfer device.
FIG. 10 is a front view of the same.
FIG. 11 is a sectional view taken along line AA in FIG. 9;
FIG. 12 is a sectional view taken along line BB in FIG. 9;
FIG. 13 is an enlarged side view of an upper transfer device according to another embodiment.
FIG. 14 is a flowchart.
FIG. 15 is a flowchart.
FIG. 16 is a flowchart.
FIG. 17 is a front view showing the outline inside the control box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Dryer frame, 2 ... Storage room, 3 ... Drying room, 4 ... Grain collection room, 5 ... Elevator, 6 ... Infrared radiator, 7 ... Grain falling passage, 8 ... Hot air room, 10 ... Ventilation room, 11 burner, 17 upper transfer device, 18 diffusion board, 21 insertion switch, 23 drying switch, 24 discharge switch, 32 moisture meter, 45 opening, 46 spiral, 47 spindle 48 discharge shutter, 49 control plate, 50 fulcrum spring, 51 link, 52 control motor, 57 bottom valve, 58 hinge, 60 contact member, 61 pin, 70 control motor

Claims (4)

A bottom valve that opens and closes the bottom by rotating around an axis aligned along the grain feed direction is provided at the bottom of a transfer device that incorporates a grain feed mechanism such as a transfer spiral. A contact member is provided so as to be rotatable up and down around an operation axis provided in parallel with the rotation axis of the bottom valve, supports the lower surface of the bottom valve at the ascending position, brings the bottom portion into a closed posture, and moves down. A grain dryer configured to receive a lower surface of a bottom valve in a posture to support a bottom portion in a predetermined open posture and to provide an opening / closing mechanism for rotating a contact member around an operation axis. The contact member includes a radius portion having a distance from the operating shaft to the bottom valve in a position in which the bottom is closed, and a contact portion extending in a substantially orthogonal direction from the radius portion and in linear contact with the lower surface of the bottom valve in the closed position. The grain dryer according to claim 1, further comprising: At the bottom of a transfer gutter provided above the storage chamber of the grain dryer and containing a grain feed mechanism such as a transfer spiral, a shutter for opening and closing the bottom, and an opening and closing mechanism interlocked to open and close the bottom are provided. The input means is configured to switch to each mode such as grain filling, drying, discharging, etc., and to drive each part of the operation, and among these, an opening output to an opening / closing mechanism to open the shutter according to the setting of the filling operation mode. A grain dryer configured to output. At the bottom of a transfer gutter provided above the storage chamber of the grain dryer and containing a grain feed mechanism such as a transfer spiral, a shutter for opening and closing the bottom, and an opening and closing mechanism interlocked to open and close the bottom are provided. A grain dryer that is configured to receive a detection signal from the grain moisture meter, and to output the output to an opening / closing mechanism so as to open the shutter when the moisture detection signal falls below a predetermined moisture value.

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