JPH07294132A - Dry hot air guide device for grain dryer - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to make the temperature distribution of the dry hot air in the ventilation chamber uniform. [Structure] Dry hot air in which hot air generated from the burner 4 that blows into the air blowing chamber 11 and outside air that is sucked in from each part of the burner case 14 are mixed is blown by a guide plate 40 provided on the rear right side of the burner 4 in the blowing direction. Is converted to improve the temperature distribution. [Effect] The temperature distribution became good by changing the blowing direction of the dry hot air with the guide plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry hot air guide device for a grain dryer.

[0002]

2. Description of the Related Art Conventionally, a grain stored in a grain storage chamber of a grain dryer is fed out from this storage chamber to the grain drying chamber and circulated while being circulated. The hot air generated from the burner installed on the left side of the burner case is mixed with the outside air sucked from the intake ports formed in the front wall plate, the bottom wall plate, and the left and right wall plates of the burner case. The dry hot air is blown into the air blowing chamber, and is passed through the drying chamber from the air blowing chamber to be exposed to the dry hot air to be dried, and when the moisture content of the grain during drying reaches the finishing target moisture content, the dryer is dried. Is automatically stopped, and the drying of the grain is stopped.

During this drying operation, the burner is installed near the left side of the burner case, and a large amount of outside air is sucked in from the right side of the burner case, so that the temperature condition of the dry hot air blown into the blower chamber is , The right side is low temperature, the left side is high temperature, the temperature distribution in the blower chamber is bad, so the grain during drying may become dry spots, and it is intended to eliminate this. is there.

[0004]

According to the present invention, the grain is fed from the upper grain storage chamber 8 to the lower grain drying chamber 9 and is circulated by letting it flow down while being installed inside the burner case 14 on one side. Hot air generated from the burner 4 and the burner case 1
4 of the front wall plate, the bottom wall plate, and the left and right wall plates, and the dry hot air mixed with the outside air sucked through the plurality of suction ports 18 is blown from the blower chamber 11 to the drying chamber 9 for drying. In the provided grain dryer, the other side of the burner case 14 that is behind the burner 4 by a predetermined distance is rearward with a predetermined width in the left-right direction to uniformly guide the dry hot air into the blower chamber 11. A dry hot air guide device for a grain dryer is characterized in that a guide plate 40 having a predetermined length that is inclined toward the upper part is provided.

[0005]

The operation and effect of the invention: The grain stored in the grain storage chamber 8 of the grain dryer is fed from the storage chamber 8 to the grain drying chamber 9 and circulated while being circulated while being burned.
For example, the hot air generated from the burner 4 installed on the left side and the outside air sucked from the plurality of suction ports 18 formed in the front wall plate, the bottom wall plate, and the left and right wall plates of the burner case 14. The mixed hot dry air acts as a resistance by the guide plate 40 behind the burner 4 and having a predetermined width and inclined toward the upper rear with a predetermined width provided on the right side, for example, and the temperature of the dry hot air becomes uniform. Then, the air is evenly sent into the air blowing chamber 11, and when it passes through the drying chamber 9 from the air blowing chamber 11, it is exposed to the dry hot air and dried, and the moisture content of the grain being dried reaches the finishing target moisture content. The dryer is automatically stopped to stop the grain drying.

As described above, the temperature condition of the dry hot air blown into the air blowing chamber 11 is made uniform by the guide plate 40, and the equalized hot air volume of the dry hot air is evenly blown, so that the air is blown. The temperature distribution in the chamber 11 was uniform, and therefore it was possible to prevent uneven drying of the grain.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The illustrated example is a circulation type grain dryer 1 for drying grains.
It shows a state in which a moisture sensor 2 for detecting moisture in the grain, a burner 4 of a combustion device 3 for generating hot air, and the like are attached.

The dryer 1 has a rectangular shape which is long in the front-rear direction and has a transfer gutter 6 and a ceiling plate 7 in which a transfer spiral is rotatably installed in the upper part of the machine wall 5, and below the ceiling plate 7 is a grain. A grain storage chamber 8 for storing grains is formed. Grain drying room 9,
In the lower side of the storage chamber 8, 9 is the exhaust chambers 10 on the left and right sides,
10 is provided between the blower chamber 11 and the central blower chamber 11, and a feeding valve 1 for feeding and flowing down the grains is provided below the drying chambers 9 and 9.
2 are rotatably supported respectively.

The grain collecting trough 13 rotatably supports a transfer spiral, and is provided below the drying chambers 9 and 9 to communicate with each other. The burner 4 of the hot-air device 3 is internally provided on one side of a box-shaped burner case 14 which is long in the lateral direction, and the air-conditioning device 15 is internally provided on the other side of the burner case 14. On the front side of the wall 5, the burner 4 is detachably provided on the outer surface of the front machine wall 5 so as to correspond to the inlet side of the blower chamber 11 with bolts and nuts, and the dryer 1, the moisture sensor 2, the burner 4, etc. An operating device 16 for starting and stopping each operation of loading, drying and discharging is detachably provided on the outer surface of the front side machine wall 5 on the upper side of the burner case 14, and an operating cover is provided on the outside of the operating device 16. 17 are provided.

The burner case 14 is in the shape of a box that is long in the lateral direction when viewed from the front. The bottom wall plate and the left and right wall plates of the box body have long hole-shaped suction ports 18b, 18c, 18 for sucking outside air.
A plurality of d are provided in a plurality of rows, a burner case cover 19 is detachably provided on the front wall plate portion of the burner case 14, and a plurality of long-hole-shaped suction ports 18a for sucking outside air are provided in the burner case cover 19 in a plurality of rows. A plurality of them.

The guide case 20 is formed in a box shape that is slightly longer in the vertical direction, and upper and lower wall plates 21c and 21d are provided with upper and lower mounting members 22a and 22b, respectively.
The a and 22b are detachably provided on the outer surface of the front machine wall 5 with bolts and nuts and the like, and are located at predetermined positions above the lower wall plate 21d between the left and right wall plates 21a and 21b on the left and right sides of the guide case 20. A burner mounting plate 23 is provided on the lower end of the burner mounting plate 23, and the end portion of the burner mounting plate 23 is bent downward to contact the lower partition plate 24 forming the blower chamber 11.

The burner 4 is composed of a combustion section 25, a blower tube section 26, etc. The combustion section 25 is composed of a combustion tube 27, a combustion disk 28, a diffusion tube 29 and a diffuser 30, which are provided on the lower left and right sides. Attach the burner fixtures 31 and 31 to the upper surface of the burner mounting plate 23 in a removable manner with bolts and nuts,
The upper burner fixture 32 provided on the upper portion is detachably attached to the upper surface of the upper wall plate 21c of the guide case 20 with bolts and nuts, and the burner 4 alone or with the guide case 20 can be attached and detached. The combustion air supplied into the burner 4 is driven by the rotation of a blower 33 provided in the blower tube portion 26 to pass from a suction port 34 of the burner mounting plate 23 to a passage case 35 and a blower hose 36 provided on the lower surface. The gas is supplied into the burner 4 through the suction port 34, and a suction guide plate 34 'is provided at the rear of the suction port 34. The fuel for combustion is supplied to the fuel pump 37 by opening and closing a fuel valve provided on the burner mounting plate 23.
The fuel in the fuel tank 38 is sucked and supplied into the burner 4.

The air conditioner 15 changes the speed of the blower 33 by changing the speed of the AC blower motor 39 for rotating the blower 33 so as to blow the combustion air corresponding to the supplied fuel amount to the burner 4. It is configured to be rotationally driven. The burner 4 is provided inside the burner case 14 on the left side, and has a wide space on the right side in front view as shown in FIG. The outside air wind sucked from the suction ports 18b, 18c, 18d provided in the bottom wall plate and the left and right wall plates of the burner case 14 and the suction port 18a of the burner case cover 19 of the front wall plate part, and the air generated from the burner 4. Mixed with the hot air to become dry hot air, and this dry hot air is blown from the blower chamber 11 to the drying chamber 9,
Although it is configured to pass through 9, the outside air sucked into the burner case 14 is more than the right side due to the relationship of the burner mounting plate 23 provided on the left side and the wide space on the right side. Since a large amount of air is sucked in, the temperature distribution of the dry hot air in the blower chamber 11 is low on the right side and high on the left side. In order to make this even temperature distribution, the burner mounting On the upper side surface of the plate 23, a guide plate 40 is provided on the right side behind the burner 4 by a predetermined distance.

The guide plate 40 has a structure in which the guide plate 40 is inclined toward the upper rear portion with a predetermined width in the left-right direction, and the inclined portion is formed to have a predetermined length. The inclined portion serves as resistance when the dry hot air is blown into the blower chamber 11, and the direction is changed to the left side portion, and the amount of the dry hot air blown into the blower chamber 11 is equal on the left and right. Moreover, the temperature distribution is made uniform. See FIG. 9 test results.

The diffusion cylinder 29 is rotationally driven by the rotation of an AC diffusion cylinder motor 41, and the ignition heater 42 is configured to ignite the atomized fuel diffused from the diffusion cylinder 29. Yes, the frame rod 43 is configured to detect the presence or absence of flame. The exhaust fan 44 is provided on the rear machine wall 5 on the central rear side exhaust cylinder 46 of the exhaust path chamber 45 provided so as to communicate with the left and right exhaust chambers 10, 10, and also on the rear machine wall 4. An exhaust fan motor 47 that rotationally drives the exhaust fan 44 is provided.

The valve motor 48 includes the delivery valves 12, 1
2 is rotationally driven via a speed reduction mechanism. Diffuser 49
Is provided at the center of the bottom plate of the transfer gutter 6 in the front-rear direction and below the supply port for supplying the transfer grains to the storage chamber 8 to uniformly diffuse and reduce the grains to the storage chamber 8. The grain-raising machine 50 is provided on the outer side of the front side machine wall 5, is provided with a belt with a bucket conveyor 51 stretched inside, and an upper end portion is provided with an ejecting cylinder 52 between the transfer gutter 6 and the starting end portion. , And the lower end is
A supply gutter 53 is provided and communicated with the terminal end of the grain collecting gutter 13.

The grain elevator motor 54 is used for the bucket conveyor 5
The belt with 1, the transfer spiral in the transfer gutter 6, the transfer spiral in the diffusing plate 49, and the grain collecting gutter 13 are rotationally driven. The moisture sensor 2 is provided substantially in the central portion in the up-down direction of the grain raising machine 50. The moisture sensor 2 is rotated by the moisture motor 55 when an electric measurement signal is transmitted from the operating device 16. Each part is driven to rotate, and the bucket conveyor 5
In step 1, the grain is received while it is being conveyed to the upper portion, and the grain is crushed under pressure to detect the water content of the crushed grain.

The operating device 16 has a box shape, and is a push button type in which a dryer 1, a moisture sensor 2, a burner 4 and the like are put on a surface plate of the box body and start operation is performed for each operation of drying and discharging. Each ON-OFF switch starting means 56, stopping means 57 for stopping operation, moisture setting picker 58 for setting the finishing target moisture of grain by operating position, and temperature of hot air generated from the burner 4 by operating position. A grain type setting grip 59, a stake amount setting grip 60, a display unit 61 for digitally displaying various display items, a monitor display, and the like are provided.

The control device 62 is provided in the operating device 16 and has detection values detected by the moisture sensor 2, the frequency sensor 63 'for detecting the power supply frequency, the hot air temperature sensor 63, etc., each starting means 56, stopping means 57, and Each setting pick 58, 59,
Operations such as 60 are input, and are composed of a CPU 64 and the like for performing arithmetic logic operation and comparison operation on these inputs.
Is configured to start, stop, and adjust the motors 41, 47, 48, 54, 55, the fuel valve, the fuel pump 37, the ignition heater 42, the frame rod 43, and the like. After that, the blower motor 39 is started, stopped, adjusted and controlled. The setting knobs 58, 59, 60 are of a rotary switch type, and predetermined numerical values, types, etc. are set depending on the operation position.

10 to 13 are views showing another embodiment, in which the frequency 50HZ detected by the frequency sensor 63 'is
Alternatively, depending on the 60HZ, the CPU 64 of the control device 62 determines the number of revolutions (T) of the blower 33 based on the constants (A to D) set and stored by the on time (TA) of the fuel valve according to the following formula. Is calculated, and the CPU 64 controls the rotation speed of the blower motor 39 to control the rotational drive of the blower 33 so that a predetermined amount of combustion air is sent from the blower 33. The relationship between the rotational speed of the blower 33 and the on-time of the fuel valve may be controlled as shown in FIG. 10 or FIG.

The constants (A) and (B) are determined by the blower 33.
Is a constant for changing the inclination angle of the inclined line that represents the relationship between the rotation speed of the fuel cell and the on-time of the fuel valve, and constants (C) and (D) are constants for changing the inclined line into parallel movement up and down. . The constant (B) is a constant for further changing the tilt angle due to temperature, the constant (D) is a constant for further changing the vertical translation due to temperature, and the (K) is a temperature correction constant.

Blower rotation speed (T) = (constant (A) -constant (B) × temperature correction constant (K)) × fuel valve on-time (TA) + constant (C) + constant (D) × temperature correction constant (K) As described above, when the power supply frequency is 50HZ, the rotation speed of the diffusion cylinder 29 is lower than that when the power supply frequency is 60HZ, so that the fuel is less likely to be atomized in the diffusion cylinder 29. Combustion flame color often becomes red fire, so it is necessary to slightly increase the amount of combustion air,
As a result, when the frequency sensor 63 'detects the frequency 50HZ, the rotation speed of the blower 33 is calculated based on this detection and the on-time of the fuel valve, and the rotation speed obtained by this calculation is controlled so that the rotation speed is controlled. Even the 50HZ area can be burned with the same combustion flame color as the 60HZ area.

The operation of the above embodiment will be described below. The setting dryers 58, 59, 60 of the operating device 16 are operated to predetermined positions, and the starting means 56 for starting the drying operation is operated, whereby the grain dryer 1 is started, and the burner 4 of the hot air device 3 is operated. The hot air is generated, and the dry hot air in which the hot air and the outside air passing around the burner 4 are mixed is the blower chamber 1
1 through each grain drying chamber 9,9 and each ventilation chamber 10,1
After passing through 0 and the exhaust passage chamber 45, the exhaust air is sucked and exhausted by the exhaust fan 44.

The grains stored in the grain storage chamber 8 are dried by being exposed to dry hot air while flowing down from the storage chamber 8 into the drying chambers 9, 9. It is fed out and flows down, and from the grain collecting trough 13 through the supply trough 53, the grain raising machine 5
0 is transferred and supplied by a lower transfer spiral, is conveyed to an upper part by a bucket conveyor 51, and is transferred and supplied by the upper transfer spiral from the throwing-out cylinder 52 to the diffusion plate 49 via the transfer gutter 6 by the diffusion plate 49. It is uniformly diffused and reduced into the storage chamber 8 and circulated and dried.

When the moisture sensor 2 detects a grain moisture which is the same as the finishing target moisture set by the operation of the moisture setting knob 58 or the following grain moisture, it is determined that the drying is completed, and the controller 62 automatically controls the drying. The machine 1 is automatically stopped and the drying of the grain is stopped. The burning of the burner 4 during the drying of the grain is caused by the hot air generated from the burner 4 and the suction ports 18b, 18c, 18d, 18 of the burner case 4 and the burner case cover 19.
It mixes with the outside air sucked from a and becomes dry hot air,
When this dry hot air is blown into the blower chamber 11, the guide plate 40 becomes a resistance and the direction is changed to the left side direction, and the amount of the dry hot air blown into the blower chamber 11 is By the air being evenly distributed on the left and right,
The temperature distribution of the dry hot air in the blower chamber 11 becomes uniform,
This is dried with hot air having a uniform temperature distribution.

[Brief description of drawings]

 The figure shows an embodiment of the present invention.

FIG. 1 is an enlarged side sectional view of a combustion device.

FIG. 2 is an enlarged front sectional view of a combustion device.

[Fig. 3] Side view of the grain dryer that can be partially broken

FIG. 4 is an enlarged sectional view taken along line AA of FIG.

FIG. 5 is an enlarged side sectional view of the burner.

FIG. 6 is an enlarged front view of the burner.

FIG. 7 is a block diagram.

FIG. 8 is an enlarged front view in which a part of the operating device can be broken.

FIG. 9: Test result diagram with or without guide plate

FIG. 10 is a diagram showing another embodiment, which is a relational diagram between the fan rotation speed and the fuel valve on-time.

FIG. 11 is a diagram showing another embodiment, which is a relational diagram between a fuel valve on-time and a constant.

FIG. 12 is a diagram showing another embodiment, which is a relational diagram between the fan rotation speed and the fuel valve on-time.

[Explanation of symbols]

 4 Burner 8 Grain storage chamber 9 Grain drying chamber 11 Blower chamber 14 Burner case 18a Suction port 18b Suction port 18c Suction port 18d Suction port 40 Guide plate

Claims (1)

[Claims] 1. The hot air generated from a burner 4 installed near one side of a burner case 14 and the hot air generated from the burner case 14 while flowing out and circulating the grain from the upper grain storage chamber 8 to the lower grain drying chamber 9. Dry hot air mixed with outside air sucked from a plurality of inlets 18 formed in the front wall plate, the bottom wall plate, and the left and right wall plates of the burner case 14 is blown from the blower chamber 11 to the drying chamber 9
In a grain dryer provided to ventilate and dry air, the dry hot air is evenly blown into the blower chamber 11 on the other side of the burner case 14 that is behind the burner 4 by a predetermined distance. A dry hot air guide device for a grain dryer, which is provided with a guide plate 40 having a predetermined width and a predetermined width that is inclined toward the upper rear portion.