JP2000161852A - Fresh air temperature detector for grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a burner case interposed in a burner from being burned. SOLUTION: There is provided an air fan passage case 19 on a side portion of a machine structure for mixing hot air from a burner and fresh air from a burner case 22. There is further provided the burner case 22 on a front outside surface of the fan air passage case 19, which case includes a burner therein. A sensor case 24 is provided on an inside surface of an upper plate 22c of the burner case 22, which case includes a fresh air temperature sensor 25, and there is further provided an intake hole 26 in the upper plate 22c for taking in fresh air, at which the fresh air temperature sensor 25 is located.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an air blower case for mixing hot air generated from a burner and external air sucked from a front portion of a burner case on a front outer surface of an airframe. A burner case containing the burner is provided on the front outer surface of the blower case, and an outside air temperature sensor is provided on the inner surface of the upper plate of the burner case. This is a technology in which a sensor case through which the air temperature passes is provided, and a suction hole for sucking outside air is provided in the upper plate on the upper side where the outside temperature sensor is located, and is used as an outside temperature detection device of a grain dryer. it can.

[0002]

2. Description of the Related Art Grains flowing down in a grain drying chamber formed between air blow chambers on both left and right sides of a fuselage and an exhaust chamber in a central portion thereof are blown through a blower case provided on a front outer surface of the fuselage. Bar on the front outer surface of
The hot air generated from the burner provided with a burner case having a burner inside and the outside air sucked from the burner case are:
The hot air is mixed in the blower case to become dry hot air, and the dry hot air is passed through the respective drying chambers from the blowing chamber to be dried, and the kernels are repeatedly circulated in each of the drying chambers to achieve the finishing target. Dry to moisture.

During the drying operation, the outside air temperature is detected by an outside air temperature sensor provided on the inner side surface of the upper plate of the burner case. During this drying operation, the used dry hot air used for drying is sucked and discharged outside the machine. For example, even when a malfunction occurs in the air blower and the air blower is stopped, the burner continues to burn, so that the dry hot air is not sucked by the air blower, and the burner case is not operated. Temperature in the inside rises abnormally,
The abnormal temperature is detected by the outside air temperature sensor, and the dryer and the burner are controlled to be stopped by this detection.

[0004]

SUMMARY OF THE INVENTION During drying, used hot dry air used for drying is sucked and exhausted outside the machine. For example, when a malfunction occurs in the air blower and the air blower stops, the temperature inside the burner case containing the burner rises abnormally, and the abnormal temperature is detected by the outside air temperature sensor. It takes a long time for the burner case to burn out, and the burner case may be burned out. However, the present invention is intended to solve this problem.

[0005]

For this purpose, the present invention relates to a grain drying chamber 13 for drying grains between an air blowing chamber 15 on the left and right sides of the body 4 and an exhaust chamber 14 at the center. A blower case 19 in which hot air and outside air are mixed on the front outer surface of the body 4; and a burner case 22 in which a burner 3 is provided on the front outer surface of the blower case 19. In the grain dryer provided with the above, an outside air temperature sensor 25 is provided on the inner side surface of the upper plate 22c of the burner case 22, and a sensor case 24 through which the outside air passes.
, And a suction hole 26 for sucking outside air is provided in the upper plate 22c on the upper side where the outside temperature sensor 25 is located.

[0006]

The grains flowing down in the grain drying chambers 13, 13 formed between the air blowing chambers 15 on the left and right sides of the machine body 4 and the air exhaust chamber 14 in the central portion are formed on the front side of the machine body 4. A burner case 2 in which a burner 3 is provided on the front side surface of the blower case 19 provided.
2, the hot air generated from the burner 3 and the external air sucked from the burner case 22 are connected to the blower case 1.
9 and becomes a dry hot air, and the dry hot air is dried by passing through the respective drying chambers 13 from the blowing chamber 15,
The grains are circulated repeatedly in each of the drying chambers 13 to dry to the target moisture value.

During the drying operation, an outside air temperature is detected by an outside air temperature sensor 25 provided in a sensor case 24 on the inner surface of the upper plate 22c of the burner case 22. During this drying operation, the used dry hot air used for drying is sucked and discharged outside the machine. For example, even when a malfunction occurs in the air blower and the air blower is stopped, the burner 3 continues to burn, so that the hot air is not sucked by the air blower and the burner is not sucked. The temperature inside the switch 22 rises abnormally, and this abnormal temperature is detected by the outside air temperature sensor 25. When the air blower is stopped, hot air of an abnormal temperature is supplied to the burner case 22 through a suction hole 26 for sucking outside air provided in the upper plate 22c on the upper side where the outside air temperature sensor 25 is located. The outside air temperature sensor 25 detects the abnormal temperature early by going out from the inside to the outside, and controls to stop the dryer and the burner 3 and the like.

[0008]

The intake hole 26 is provided in the upper plate 22c of the burner case 22 at the position where the outside air temperature sensor 25 is located.
When the outside temperature is detected from the inside of the case 22 by the outside air temperature sensor 25, the detection time of the abnormal temperature is shortened. Therefore, the burnout of the burner case 22 can be prevented.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The illustrated example shows a state in which a moisture sensor 2 for detecting the moisture of grains, a burner 3 for generating hot air, and the like are mounted on a circulation type grain dryer 1 for drying grains. The drier 1 has a body 4 formed by front and rear and left and right machine walls 4a in a rectangular shape that is long in the front and rear direction, and a transfer gutter 5 in which a transfer spiral is rotatably mounted on an upper portion of the body 4, and A ceiling plate 6 is provided, and a grain storage chamber 7 for storing grains is formed below the ceiling plate 6.

Below the storage chamber 7, between a falling plate 8 inclined to the lower inside and a central falling plate 9 having a mountain-shaped cross section at the center, on the inner side surfaces of the machine walls 4a on both the left and right sides. And a substantially V-shaped flow-down chamber 10 provided on both left and right sides. An outer drying net 11 is provided below the flow-down chambers 10, 10 so as to be connected to the lower end portions of the flow-down plates 8, 8 and to be inclined downward toward the inside.
A grain drying chamber 13 is provided on the left and right sides of the inner drying net 12 which is connected to the lower end of the central flow-down plate 9 and is inclined to the lower inside. .

An exhaust chamber 14 is provided below the central flow-down plate 9 at the center and between the drying chambers 13 and 13. Further, the blower chamber 15 is located below the falling plates 8 on both the left and right sides,
It is provided outside of 3 and 13. In the blower chamber 15, a hot air temperature sensor 15a for detecting the temperature of the dry hot air is provided. At the confluence at the bottom of each drying chamber 13,
It has a configuration in which a feed valve 17 that is driven in reverse rotation to feed and flow down the grains in the storage chamber 7 through the respective flow-down chambers 10 and into the respective drying chambers 13 is pivotally supported. The feed valve 17 has a configuration in which a grain is alternately drawn from upper and lower drying chambers 13 and 13 at an upper portion, and a suction port 17b is provided at an outer peripheral portion of a cylindrical tube 17a which discharges the grain at a lower portion.

The grain collecting gutter 18 has a structure in which a transfer spiral is rotatably supported on a shaft and provided below each of the drying chambers 13 and 13 so as to communicate with each other. When the feeding valve 17 is driven to rotate and the pumping port 17b of the feeding valve 17 comes to a lower discharge position for discharging grains, a photoelectric type ON-OFF switch type position sensor for detecting the pumping port 17b. 17c
Is provided on the support plate 17d inside the rear machine wall 4, for example.

A box-shaped air passage case 19 is detachably provided on the outer surface of the front machine wall 4a where the air blow chambers 15 and the respective drying chambers 13 are located, and the air blow case 19 is formed. The left and right plates 19a and 19b are provided with a plurality of horizontal outside air intake ports 20a having a predetermined length in the front-rear direction for sucking the external air at predetermined intervals in the vertical direction. On the front plate 19e of the air passage case 19, circular and long hot air suctions 20c and 20d for sucking the hot air generated from the burner 3 are provided at two locations, that is, a substantially central portion and a lower portion in the vertical direction. , As shown in FIG.
Further, the upper plate 19c is provided with a plurality of upper / outer air suction ports 20b each having a predetermined length in the left / right direction for sucking the outside air and a plurality of rows in the left / right direction. By providing the hot air suction port 20d, it is possible to prevent a temperature rise in the lower portion of the blower case 19.

A guide plate 21 having a predetermined length in the front-rear direction and a predetermined width in the left-right direction at a lower position provided at a predetermined distance from the upper plate 19c of the blower case 19 as shown in FIGS. 8 and 9. Provided. As shown in FIG. 10, the upper plate 19c and the lower plate 19d are spaced apart from each other by a predetermined distance in a predetermined length in the front-rear direction and at a predetermined width in the left-right direction in a front-rear direction. It is good also as composition provided with boards 21a and 21a. This prevents the temperature of the upper and lower plates 19c and 19d of the blower case 19 from rising.

The burner 3 is provided with an air passage case 19 and a front plate 1.
9e, it is provided inside a burner case 22 which is detachably provided on the front side surface. The burner case 22 is formed in a box shape by left and right plates 22a and 22b and upper and lower plates 22c and 22d.
The rear part of 22b is provided at a substantially central part in the vertical direction with a plurality of horizontal external air intake ports 23 having a predetermined length in the vertical direction for sucking the external air in the vertical direction.

At a place where the burner 3 is located on the inner side surface of the upper plate 22c of the burner case 22, a sensor case 24 having a U-shape in front view is mounted and provided.
Is a bent portion 2 having a predetermined width and a predetermined length which is bent inward.
4a, and an outside air temperature sensor 25 for detecting the outside air temperature is detachably attached to the bent portion 24a. In addition, the upper bar to which the outside air temperature sensor 25 is attached is attached.
The outside air is sucked into the upper plate 22c of the nurse 22,
At a position where the temperature of the outside air is detected by the outside air temperature sensor 25, for example, a circular suction hole 2 for sucking outside air is provided.
6 is provided, which is a configuration for detecting an accurate outside wind.

By detecting an abnormally high outside air temperature detected by the outside air temperature sensor 25, an abnormality is generated in a blower 27 described later, and it is detected that the blower 27 is not rotationally driven. Thus, the dryer 1 and the burner 3 are controlled to stop. The burner case 22
At the front end, a burner cover 28 having a suction net 28a capable of sucking outside air stretched on the front side is detachably mounted.

The hot air generated from the burner 3, the outside air sucked from the suction net 28 a of the burner cover 28, and the outside air sucked from the lateral outside air inlet 23 of the burner case 22 are as follows. The hot air suction ports 20c and 20d of the front plate 19e of the blower case 19 are sucked into the blower case 19, and these and the horizontal and upper outside air inlets of the blower case 19. The outside air sucked from the air blowers 20a and 20b is mixed in the blower case 19 into dry hot air, and the dry hot air is triangular dry hot air inlets 4b on both left and right sides of the front wall 4a. , 4b through each air blowing chamber 15 and each drying chamber 13
It is a configuration that cross-ventilates.

On the outer surface of the rear machine wall 4a where the exhaust chambers 14, 14 are located, there is provided an exhaust path case 29 through which box-shaped exhaust air passes. An exhaust fan 27 is provided on the outer side surface of the rear plate forming the exhaust pipe 29. The exhaust fan 27 removes the dry hot air used for drying from the exhaust chambers 14 and 14 through the exhaust path case 29. The air is discharged to the outside of the apparatus, and the air blower 27 is configured to be rotationally driven by a blower motor 27a.

The valve motor 30 is configured to rotate forward and backward, and is provided on the rear machine wall 4a.
Is rotated through a CPU 32 of a control device 31 which will be described later, and by this command, the valve motor 30 is driven to rotate forward, the delivery valve 17 is driven to rotate forward, and the cylinder 17a of the delivery valve 17 is rotated. Grains are drawn from the drying chamber 13 on one side at the drawing port 17b, and when the drawing port 17b comes to a lower discharge position where the grains are discharged, the grain is discharged from the drawing port 17b and the position sensor 1
7c, the pumping port 17b is detected, and this detection is input to the CPU 32 of the control device 31, and the CPU 3
A command to stop the forward rotation of the valve motor 30 is output from 2, and the forward rotation of the valve motor 30 is controlled to be stopped by this command.
Stop control is performed at a lower discharge position for discharging kernels, and the control is stopped for a predetermined time.

When the predetermined time has expired, the CPU 32 of the control device 31 outputs a command to start the reverse rotation of the valve motor 30. In response to this command, the valve motor 3
0 is driven in reverse rotation, and the delivery valve 17 is driven in reverse rotation, and the suction port 17 of the cylinder 17a of the delivery valve 17 is rotated.
b, the kernels are pumped from the drying chamber 13 on the other side, and the outlet 17b is moved to a lower discharge position for discharging the kernels.
Comes out from the pumping port 17b,
This pumping port 17b is detected by the position sensor 17c,
This detection is input to the CPU 32 of the control device 31,
The CPU 32 outputs a command to stop the reverse rotation of the valve motor 30. The command controls the reverse rotation of the valve motor 30 to stop. The pumping port 17b of the delivery valve 17 discharges the grain. Stop control is performed at the lower discharge position, and the stop is performed for a predetermined time.

Each of the drying chambers 1 is rotated by a forward rotation and a reverse rotation repeatedly.
The grains in each of the drying chambers 13 and 13 are alternately pumped, and the grains in each of the drying chambers 13 and 13 are dried by repeating the circulation. In addition, the suction port 1 of the feed valve 17
The stop position of 7b always stops at the lower discharge position for discharging the grains.

The fuel pump 33 has a fuel valve,
The fuel pump 33 sucks fuel in a fuel tank 34 and supplies it to the burner 3 by opening and closing the fuel valve. The blower 36a
The burner 3 is provided in a burner cylinder 35, and is driven by a variable speed blower motor 36b provided in the burner cylinder 35 to perform a rotational speed change. The blower 36a blows the combustion portion of the burner 3 to generate hot air.

The diffusion plate 37 is provided at the center of the bottom plate of the transfer gutter 5 in the front-rear direction, below the supply port for supplying the transfer kernels to the storage room 7, and uniformly diffuses and reduces the kernels to the storage room 7. ing.
The grain raising machine 38 is provided on the outer side of the front machine wall 4a, and has a belt with a bucket conveyor 39 stretched inside. The upper end of the grain raising machine 38 is provided with a discharge cylinder 40 between the transfer gutter 5 and the start end. The lower end portion is provided with a supply gutter 41 and communicates with the end portion of the grain collecting gutter 18.

The raising machine motor 42 includes a bucket conveyor 3
The belt 9, the transfer spiral in the transfer gutter 5, the diffusion plate 37, and the transfer spiral in the grain collecting gutter 18 are rotationally driven. The moisture sensor 2 is provided substantially at the center in the vertical direction of the grain raising machine 38. The moisture sensor 2 is rotated by the transmission of an electrical measurement signal from an operating device 43 detachably provided on the front wall 4a of the moisture sensor 2, and the respective components of the moisture sensor 2 are rotationally driven. The bucket conveyor 39 receives the grains that fall during transportation to the upper part, and detects the moisture in the ground grains while crushing and compressing the grains.

The operating device 43 has a box shape, and a drying machine 1, a moisture sensor 2, a burner 3 and the like are put on the surface plate of the box body, and the starting device is operated for each of the operations of drying, discharging and discharging. Each starting means 45 of an ON-OFF switch by a push button system, a stopping means 46 for stopping operation, a moisture setting knob 47 for setting a finishing target moisture of the grain by an operation position, a temperature of hot air generated from the burner 3 , A grain type setting knob 48, an inset setting knob 49, a display unit 50 for digitally displaying various display items, a monitor display 51, and the like.

The control device 31 is provided in the operation device 43 and detects the moisture sensor 2, the position sensor 17c, the outside air temperature sensor 25, the hot air temperature sensor 15a, and the like.
Each starting means 45, stopping means 46, and each setting knob 47,
48 and 49 are input, and the CPU 32 performs arithmetic and logical operations on these inputs and performs a comparison operation. The CPU 32 controls the motors 27a, 30, 36b, 42, 4
4. Start / stop the fuel valve, fuel pump 33, etc.
And adjustment control and the like. Each setting knob 47,
Reference numerals 48 and 49 denote a rotary switch system, and predetermined numerical values, types, and the like are set according to the operation positions.

The front plate 19e of the blower case 19 includes
As shown in FIGS. 8 and 9, an outside air temperature sensor 25 is provided at a substantially intermediate portion between the guide plate 21 and the upper plate 19c of the air passage case 19.
The temperature of the outside air sucked from the upper outside air suction port 20 provided on the upper plate 19c is detected, and the outside air temperature is detected. As a result, when the air blower 27 stops abnormally, the temperature in the air duct case 19 rises abnormally. When the outside temperature sensor 25 detects this abnormal temperature,
The conventional thermostat for detecting an abnormal temperature is not required, and the cost can be reduced.

As shown in FIGS. 11 and 12, the upper plate 19c of the blower case 19 is provided in the blower case 19.
A U-shaped inner cover 52 is provided between the lower portion of the predetermined position and the lower plate 19d, and the width of the inner cover 52 is narrower by a predetermined width than the width in the left and right direction of the blower case 19, and the front of the inner cover 52 In the vicinity of the right end in the view, the outside air temperature sensor 25 is provided so as to protrude upward from the inner cover 52, and the hot air temperature sensor 15a is provided so as to protrude downward.

Thus, when the exhaust fan 27 stops abnormally, both the outside air / hot air temperature sensors 25 and 15a can detect an abnormally high temperature in the air passage case 19,
The conventional thermostat for detecting an abnormal temperature is unnecessary, and the cost can be reduced. In addition, accurate detection can be performed by detecting both. As shown in FIGS. 13 and 14, the front plate 19e of the blower case 19 is provided with a hot air temperature sensor 15a protruding into the blower case 19 at a substantially central portion in the vertical direction. The outside air temperature sensor 25 is provided so as to protrude into the burner case 22.

Thus, the same effect as described above can be obtained. As shown in FIG. 15, the combustion platen 35a provided at the front of the burner cylinder 35 of the burner 3 has a deformed portion 35b which projects outward from the burner cylinder 35 on the right side as viewed from the front. The igniter 5 determines whether or not ignition has occurred in the deformed portion 35b.
3 and the color of the flame is detected by the frame lot 54 by the deformed portion 35b.

A deformation portion 35 is provided on the combustion platen 35a of the burner 3.
With the provision of b, the amount of outside air passing through the burner 3 is such that the deformed portion 35b has a ventilation resistance. As a result, the amount of outside air passing through the burner 3 tends to be large on the left side and small on the right side. For this purpose, as shown in FIG. 15, the burner 3 is moved to the left side with respect to the burner case 22 so as to equalize the amount of outside air passing through the burner 3 on both the left and right sides. is there.

As a result, the temperature distribution of the dry hot air is improved. Further, each hot air inlet 20c, 20
The balance of the hot air passing through d becomes good, and noise can be prevented.

[Brief description of the drawings]

FIG. 1 is an enlarged front view of a main part.

FIG. 2 is an enlarged side view of a main part.

FIG. 3 is an enlarged plan view of a main part.

FIG. 4 is a partial cross-sectional overall side view of the grain dryer.

FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 4;

FIG. 6 is an enlarged front view of a partially sectioned operating device.

FIG. 7 is a block diagram.

FIG. 8 is a view showing another embodiment, and is an enlarged front view of a blower case case portion.

FIG. 9 is a view showing another embodiment, and is an enlarged side view of an air passage case.

FIG. 10 is a view showing another embodiment, and is an enlarged front view of a blower case.

FIG. 11 is a view showing another embodiment, and is an enlarged front view of a blower case.

FIG. 12 is a view showing another embodiment, and is an enlarged side view of an air passage case.

FIG. 13 is a view showing another embodiment, and is an enlarged front view of a blower case case portion.

FIG. 14 is a view showing another embodiment, and is an enlarged side view of an air passage case.

FIG. 15 is a view showing another embodiment, and is an enlarged front view of an air passage case.

[Explanation of symbols]

 Reference Signs List 3 burner 4 fuselage 13 grain drying room 14 air exhaust room 15 air blow room 19 air blow case 22 burner case 22a upper plate 24 sensor case 25 outside temperature sensor 26 suction hole

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L113 AA07 AB04 AC04 AC40 AC41 AC45 AC46 AC54 AC56 AC57 AC59 AC63 AC67 AC72 AC74 AC78 AC79 AC82 AC86 BA03 CA02 CA06 CA08 CA14 DA06 DA07 DA11 DA15 DA18 DA26

Claims (1)

[Claims] 1. A grain drying chamber (13) for drying grains between an air blowing chamber (15) on the left and right sides of the body (4) and an exhaust chamber (14) in the center.
A blower case 19 in which hot air and outside air are mixed on the front outer surface of the body 4; and a burner case in which a burner 3 is provided on the front outer surface of the blower case 19. 22 is provided with a sensor case 24 on the inner side of the upper plate 22c of the burner case 22 through which an outside air wind passes, and a sensor case 24 through which the outside air passes. The upper plate 22c on which the upper surface 25 is located has a suction hole 26 for sucking outside air.
A device for detecting the outside air temperature of a grain dryer, comprising: