JP4009740B2 - Grain dryer burner structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a burner part structure of a grain dryer, and more particularly to a burner part structure of a grain dryer that can improve the installation space efficiency of the burner part of the grain dryer with a simple configuration.
[0002]
[Prior art]
In a grain dryer consisting of a tempering tank with a grain circulation system, a drying unit with an exhaust ventilation mechanism, a hot air supply and hot air chamber for cereal collection, etc., a burner case is attached to the outside of the hot air chamber An internal burner structure is known (for example, JP-A-8-3399).
The grain dryer 100 includes, for example, a storage unit 110, a drying unit (drying chamber) 111, a cereal collection chamber 101, an elevator 113, and the like as shown in a front sectional view showing the internal configuration in FIG. The storage unit 110 is provided with an upper transfer device 114, a diffusion plate 114a, and the like, and is tempered while storing grains evenly. The drying unit 111 includes suction cylinders 115 and 115, ventilation guides 116 and 116, feeding units 119 and 119, and the like, and is dried by hot air received from the ventilation guides 116 and 116 while flowing down the grains at a constant speed. The grain collection chamber 101 includes a lower transfer device 118 a at the lower end of the grain collection plates 118, 118 and forms a hot air chamber that sends hot air to the drying unit 111. The elevator 113 constitutes a grain circulation system that sends the grains of the cereal collection chamber 101 to the storage unit 110. A burner section for supplying hot air through an opening is provided on the outside of the front wall of the grain collection chamber 101.
As shown in the exploded cross-sectional view of the drying section and hot air chamber of the grain dryer in FIG. 14, the conventional burner section structure includes a hot air distribution duct 103 on the front wall 102 of the hot air chamber 101. A burner case 104 protrudes from the front portion, and the burner 105 is accommodated in the burner case 104 so that the burner flame blows out in the lateral direction (upward in the figure). Further, the drying unit 111 in contact with the hot air chamber 101 is provided with an exhaust fan 133 through the air collecting duct 132 on the outer wall 131 on the back side.
In the burner part structure, fuel and primary air are supplied to the burner 105 in the burner case 104, the introduced outside air sucked toward the drying part 111 is heated, and hot air is supplied to the hot air chamber 101 via the hot air distribution duct 103. Supply. In the drying unit 111 that receives the hot air, the grains are sequentially supplied from the storage unit 114 by the grain circulation system, and the grains are heated and dried while flowing down at a constant speed by the feeding units 119 and 119.
[0003]
[Problems to be solved by the invention]
However, the burner section having the above configuration is complicatedly configured with the fuel supply mechanism, the primary air supply mechanism, the power line of the fuel pump and the intake fan, etc. attached to the burner. It was necessary to remove, disassemble the burner and the accessory, or take out the burner and the accessory together to the side of the burner case. Since a large space for such maintenance work is required around the burner section, even if the hot air distribution duct and the burner case are made small to reduce the size of the grain dryer body, Since a large area is required for maintenance, there has been a demand for improvement in the efficiency of the installation space for the grain dryer by reducing the maintenance work space in the burner section while reducing the size of the main body. This problem is common to the type in which the burner is arranged toward the hot air chamber.
[0004]
The purpose of the present invention is to reduce the maintenance space and improve the installation efficiency of the grain dryer without increasing the size and complication of the structure of the grain dryer. To provide a structure.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a grain dryer for drying grain by dry hot air circulating through the drying chamber while circulating the grain, and hot air is blown to the front wall of the drying chamber. Grain dryer burner provided with a distribution duct to be supplied to the chamber, and a burner case protruding from the front side of the side wall of the distribution duct and a burner installed in the burner case to heat the air sent to the hot air distribution duct In the part structure, a mounting opening for attaching / detaching the burner that opens to the lower surface of the burner case is formed, the burner is disposed in the mounting opening, and the burner base that supports the burner is closed from the lower side to the mounting opening. A cylindrical member for mounting and further supporting the burner is provided between the burner base and this cylindrical member is configured as a duct for supplying primary air to the burner .
[0006]
The burner and the burner base can be handled as an integral unit, and this burner unit can be attached to and detached from the mounting opening of the burner case from the lower side during maintenance of the burner or the like.
Moreover, the burner part structure of the said grain dryer can aim at reduction of a number of parts, ensuring the support strength of a burner.
[ 0007 ]
【The invention's effect】
The burner structure of the grain dryer of the present invention has the following effects.
The burner structure of the grain dryer having the above-described structure is configured such that the burner is attached to the burner base and is detachable so as to be closed from below the mounting opening that opens on the lower surface of the burner case. The burner unit can be handled as a unit, and can be attached to and detached from the opening of the burner case from the lower side during maintenance of the burner or the like. Therefore, it is possible to improve the space efficiency by reducing the installation space on the burner unit side of the grain dryer to a minimum without requiring a handling space for attaching / detaching the burner unit to the side of the burner case.
Moreover, since the cylindrical member that supports the burner is configured as a primary air supply duct, the number of components is reduced while ensuring the support strength of the burner. Therefore, space saving and cost reduction are possible.
[ 0008 ]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
The grain dryer provided with the burner unit according to the invention includes, for example, a storage unit 110, a drying unit (drying chamber) 111, a grain collection chamber 101, an elevator 113, and the like as shown in FIG. The storage unit 110 is provided with an upper transfer device 114, a diffusion plate 114a, and the like, and is tempered while storing grains evenly. The drying unit 111 includes suction cylinders 115 and 115, ventilation guides 116 and 116, feeding units 119 and 119, and the like, and is dried by hot air received from the ventilation guides 116 and 116 while flowing down the grains at a constant speed. The grain collection chamber 101 includes a lower transfer device 118 a at the lower end of the grain collection plates 118, 118 and forms a hot air chamber that sends hot air to the drying unit 111. The elevator 113 constitutes a grain circulation system that sends the grains of the cereal collection chamber 101 to the storage unit 110. A burner section for supplying hot air through an opening is provided on the outside of the front wall of the grain collection chamber 101.
[ 0009 ]
A perspective view of the burner portion according to the invention is shown in FIG. 1, and a perspective front view of the burner portion is shown in FIG. In FIG. 1 and FIG. 2, the burner unit 1 is provided with a burner case 5 projecting from the front of a hot air distribution duct 3 disposed on the front wall 2 of the drying unit, and the hot air distribution duct 3 provided inside the burner case 5. A burner 6 for heating the air to be sent is provided.
[ 0010 ]
The hot air distribution duct 3 is configured as a duct that receives hot air from the burner case 5 side by intake air in the drying section of the grain dryer and distributes the hot air to each part of the hot air chamber. In addition, a slit-shaped outside air inlet 3a is opened in the outer peripheral wall in a predetermined range.
[ 0011 ]
The burner case 5 is provided with a detachable cover 5b on the front side thereof, the side surface of the burner 6 can be opened, and simple maintenance, cleaning, and the like can be performed. In addition, a burner attaching / detaching port 5c is opened on the lower surface of the burner case 5, and a slit-shaped outside air inlet 5a is formed in a predetermined range. In the mounting opening 5c, a burner 6 having a blower cylinder 6a, a combustion cylinder 6b, and the like is disposed side by side in parallel with the drying unit front wall 2 so that the combustion flame from the combustion disk is ejected sideways. The supporting burner base 7 is configured to be closed at the mounting opening 5c from below. The burner 6 is in the form of a rotary gasification burner that gasifies and burns kerosene fuel.
[ 0012 ]
A horizontal burner 6 is fixed to the burner base 7 by support legs 8. An air inlet 10 with a cover is formed on the upper surface of the burner base 7 and a fan 9 is provided to supply primary air to the burner 6. The cover-equipped inlet 10 opens toward the downstream side of the burner axis so as not to be directly subjected to pressure fluctuations due to the introduced outside air. In addition, each mechanism of the fuel supply system by the fuel pump 11 and the ignition system by the step-up transformer 12 is attached to the burner base 7 to constitute an integrated unit. A hot air guide 13 is disposed in front of the burner 6. In the hot air guide 13, the hot air to be guided is bent at a right angle so that the discharge port 13 a communicates with the hot air distribution duct 3.
[ 0013 ]
Further, as shown in FIG. 3 showing a cross-sectional view along line AA in FIG. 2 and a cross-sectional view along line BB in FIG. 2, if necessary, the support leg 8 of the burner 6 is configured as a primary air supply path. To do. Specifically, the support leg 8 is configured to communicate with the inside of the burner 6 by a cylindrical member, and the duct 15 connected in a plug-in manner so as to wrap the discharge side of the fan 9 is communicated with the lower end of the support leg 8. The fan 9 is fastened and fixed to the burner base 7 with a flange portion 9a formed on the fan body, and the air inlet 10 is also fastened and fixed together. On the other hand, the duct 15 is fixed to the burner base 7 together with the flange portion of the support leg 8. Therefore, the opening end of the fan body is inserted into the duct 15 and can be supported and fixed.
In addition, inside the burner case 5, as shown in a transparent front view (a) and a transparent side view (b) of the burner portion related to sensor mounting in FIG. 4, the outside air introduction portion wall on the back side of the support leg 8 of the burner 6. The outside air temperature sensor 18 is attached to the door 18 via the stay 18a. The outside air temperature sensor 18 is located on the back side which is not easily affected by the burner 6 flame, and is disposed in correspondence with the outside air introduction slit 5a, so that an accurate outside air temperature state can be detected. This detected outside air temperature controls the combustion amount. A wind pressure sensor 19 is attached above the outside air temperature sensor 18 via a stay. The wind pressure sensor 19 is configured to detect the presence or absence of wind pressure by providing a detection unit having a long wind receiving surface at the top and bottom in a swingable manner and turning on and off a limit switch (not shown) on the base side.
[ 0014 ]
The burner unit 1 of the grain dryer configured as described above can handle the burner and the burner base as a unit, and this burner unit can be attached to and detached from the mounting opening of the burner case from the lower side during maintenance of the burner or the like. it can. Therefore, it is possible to improve the space efficiency by reducing the installation space on the burner unit side of the grain dryer to a minimum without requiring a handling space for attaching / detaching the burner unit to the side of the burner case. In addition, the unit configuration facilitates handling in the factory, market maintenance, parts replacement, and the like.
[ 0015 ]
Next, the controller unit of the grain dryer will be described. FIG. 5 is an exploded perspective view of the controller of the grain dryer, FIG. 6 is a perspective front view thereof, and FIGS. 7 and 8 are an enlarged front view and an enlarged side view thereof.
5 to 8, the controller unit 21 includes left and right support legs 22, 22 erected on the upper part of the burner case 5, a control unit 23 and a burner controller 23 a fixed to the support legs 22, 22, and the entirety thereof. And a hermetic cover 24 covering from the above. The control unit 23 controls the entire grain dryer, and is provided with an operation panel on the front side thereof, a humidity sensor 26 disposed therein, and other sensor signals. This control unit 23 determines the required amount of combustion by an input from the operation panel and a sensor such as a hot air temperature detector disposed in the drying section or the like, and commands the fuel supply amount of the burner 6 and the like. The burner controller 23a is configured to receive the combustion amount command signal from the control unit 23 and to control the rotational speed of the burner fan 9 so as to ensure the combustion amount for proper combustion. The humidity sensor 26 is used to control the temperature of hot air related to the drying speed of the grain.
[ 0016 ]
A transparent window 27 that can be opened and closed for monitoring and operation of the control unit 23 is provided in the front portion of the hermetic cover 24. On both side surfaces 25 and 25 of the sealing cover 24, slit-like outside air inlets 28 and 28 are opened at the top thereof. The outside air sucked from the outside air inlets 28, 28 reaches the lower burner case 5, and the humidity sensor 26 is arranged in the cooling range near the streamline.
[ 0017 ]
Due to the arrangement of the humidity sensor 26, if the vent hole is only provided, the entire burner case 5 is warmed by the radiant heat from the burner 6, and the temperature of the humidity sensor part rises due to the heat, and accurate humidity cannot be measured. The heat generated by the controller can also be introduced into the burner case 5 without causing radiant heat to be applied to the burner case 5 by the hot air guide 13 and by circulating the outside air from the outside air inlets 28, 28, so that accurate humidity measurement can be performed. It becomes possible.
[ 0018 ]
The hermetic cover 24 is provided with an extension 30 in the vicinity of the drying unit front wall 2 at the back of the back plate 29. Further, a minimum notch 31 for inserting a harness is formed at the lower end of the side plate 28 and a through hole 32 with a guide corresponding to the harness diameter is formed at the upper part of the burner case 5, and the others are sealed to form a fender case. Constitute.
[ 0019 ]
As described above, since there are a plurality of actuators and sensors in the combustion system actuators, sensors, and above and / or below, and the side just below the controller, the harness connected to the bottom and / or side actuators and sensors is the burner's The harness is routed from the lower part of the box through the burner, and the upper and / or side harness is routed through the notch 31 at the lower end of the side surface of the sealing cover 24.
[ 0020 ]
Such a harness routing configuration can solve the following problems.
Behind the controller unit 21 that is normally arranged at the upper part of the burner case is a joint portion between the body unit and the tank or the drying unit, and the gap between the drying unit front wall 2 is unstable, and is a matter of concern for fouling countermeasures. Met. Also, conventionally, it is advantageous for fenders to pass through the burner case and pass the harness from below, and the lower and / or side harnesses are passed from below, but the upper harness is once lowered to the lower part, In addition to being disadvantageous in terms of cost, it was disadvantageous in terms of competition, as it was a local assembly site and increased the number of local assembly steps.
[ 0021 ]
Next, the hot air distribution duct part of the grain dryer will be described. FIG. 9 is a perspective view of the hot air distribution duct, FIG. 10 is a front view thereof, and FIG. 11 is a sectional view taken along line AA of FIG.
9 to 11, the hot air distribution duct 3 is interposed between the hot air chamber of the grain dryer and the burner case 5, and communicates with the discharge port 13 a of the burner case 5 in order to receive the hot air from the burner 6. .
[ 0022 ]
A central port 41, a left port 42, and a right port 43 are formed in the front wall 2 of the hot air chamber, and a guide plate 44 is provided between the discharge port 13 a of the burner case 5 and the central port 41. In order to make the hot air velocity distribution from the burner 6 uniform, the center port 41 has a left-half opening area on the downstream side of the hot air that is small and asymmetrical. The guide plate 44 is disposed at an angle at which the flow from the discharge port 13 a is inclined mainly below the central port 41. The inclination of the guide plate 44 ensures intake from the outside air introduction port 3a while restricting the flow from the discharge port 13a to the central port 41. Moreover, the flow toward the lower side of the central port 41 is divided into the left and right ports by the front wall 2 of the hot air chamber.
[ 0023 ]
As shown in the plan view of the hot air flow path in the hot air distribution duct part of the grain dryer in FIG. 12, the hot air heated by the burner 6 in the burner case 5 is After being bent through the hot air guide 13 and discharged from the discharge port 13 a, it is discharged obliquely mainly below the central port 41 by the guide plate 44. As a result, a part is appropriately distributed to the front central port 41 and the remaining part is appropriately distributed to the left port 42 and the right port 43. Further, since the center port 41 has a left-right asymmetrical shape, the right / left bias of the hot air is corrected and uniformed, so that the flame extending from the burner 6 during mass combustion is suppressed.
[ 0024 ]
Therefore, by adjusting the size and inclination of the guide plate 44, the degree of freedom in adjusting the hot air distribution, which was difficult only by the area ratio distribution of each port, is improved. As a result, the temperature distribution in each part of the hot air chamber of the grain dryer corresponding to the three ports can be equalized, so that a uniform drying process can be performed without reducing the processing speed.
[Brief description of the drawings]
1 is a perspective front view of a burner portion of a grain dryer according to the invention. FIG. 2 is a partially cutaway front view of the burner portion of FIG. 1. FIG. 3 is a sectional view taken along line AA in FIG. BB sectional view (b)
4 is a transparent front view (a) and a transparent side view (b) according to sensor mounting of the burner portion of FIG. 1. FIG.
5 is an exploded perspective view of the controller of the grain dryer. FIG. 6 is a transparent front view of the controller of the grain dryer of FIG. 5. FIG. 7 is an enlarged front view of the controller of the grain dryer of FIG. 8] Enlarged side view of the controller of the grain dryer of FIG. 5 [FIG. 9] Perspective perspective view of the hot air distribution duct part of the grain dryer of FIG. 5 [FIG. 10] Front view of the hot air distribution duct part of FIG. 11] Cross section along line AA in FIG. 10 [FIG. 12] Plan view of hot air flow path in hot air distribution duct part of grain dryer [FIG. 13] Front sectional view showing internal configuration of grain dryer [FIG. 14] Grain Exploded cross-sectional view of drying section and hot air chamber of dryer [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Burner part 2 Front wall 3 Hot air distribution duct 3a Outside air introduction port 5 Burner case 5a Outside air introduction port 5c Installation port 6 Burner 7 Burner base 8 Support leg (duct)
9 Fan 10 Covered inlet 13 Hot air guide 13a Discharge port 15 Duct 21 Controller unit 26 Humidity sensor 28 Outside air inlet 41 Central port 42 Left port 43 Right port 44 Guide plate

Claims (1)

A grain dryer for drying grains by drying hot air circulating in the drying chamber while circulating the grains, and a distribution duct is provided on the front wall of the drying chamber to supply hot air to the hot air chamber, and the front side of the side wall of the distribution duct A burner case projecting from
In the burner part structure of the grain dryer provided with the burner which is installed in this burner case and heats the air sent to the hot air distribution duct,
Forming a mounting opening for attaching / detaching the burner that opens on the lower surface of the burner case;
Place the burner in this mounting opening,
Attach the burner base that supports this burner to the same mounting opening from below ,
A burner part structure for a grain dryer , further comprising a cylindrical member for supporting the burner provided between the burner base and the cylindrical member configured as a primary air supply duct for the burner .

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