JP2970039B2 - Abnormality detector of grain dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality in a grain dryer.

[0002]

2. Description of the Related Art Conventionally, a grain drying chamber for drying grains and a grain collecting gutter for collecting grains are provided below the upper grain storage chamber. Is equipped with a built-in burner,
A burner cover having an outside air suction port for sucking outside air covering the burner is provided on the outside of the burner so as to be detachable, and the presence or absence of outside air passing through the burner is detected near the burner. This is an abnormality detection device for a grain dryer in which a wind pressure sensor is provided and a special detection sensor for detecting forgetting to attach the burner cover or the like is not provided.

[0003]

The grains accommodated in the grain storage chamber of the grain dryer are drawn out of the grain drying chamber from the storage chamber, and are collected in a grain collecting trough. While being reduced and circulated to the room, the hot air for drying in which the hot air generated from the burner and the external air sucked from the external air inlet of the burner cover are mixed and sucked and exhausted by the exhaust fan,
When the hot air for drying passes through the drying chamber, the grains flowing down in the drying chamber are exposed to the hot air for drying and dried.

During the drying operation, if a problem occurs in the air blower that sucks and exhausts the hot air for drying and the hot air for drying is no longer sucked and exhausted, the air pressure sensor provided in the vicinity of the burner detects this problem. Although a defect is detected, even if the burner cover is forgotten to be attached, it cannot be detected, and this is dangerous and the outside air is sucked in more than necessary. In some cases, the temperature does not rise, and these are intended to be eliminated.

[0005]

According to the present invention, a grain drying chamber 2 for drying grains and a grain collecting gutter 3 for collecting grains are provided below the grain storage chamber 1 on the upper side. A burner 4 is built in the inside of the machine below the grain collecting gutter 3 and a burner cover 6 having an outside air inlet 5 for covering the burner 4 and sucking outside air is detachably attached to the outside of the burner 4. The burner cover 6 has a wind pressure sensor 7 for detecting both the presence or absence of outside air passing through the burner 4 and the attachment / detachment of the burner cover 6.
The structure of the abnormality detection device of the grain dryer characterized by having the above is provided.

[0006]

The grains accommodated in the grain storage chamber 1 of the grain dryer are fed out of the grain drying chamber 2 from the storage chamber 1 and collected, and collected in the grain collecting trough 3. The hot air for drying in which the hot air generated from the burner 4 and the outside air sucked from the outside air suction port 5 of the burner cover 6 are mixed and returned to the storage chamber 1 while being circulated is sucked and exhausted by the exhaust fan. By
The hot air for drying passes through the drying chamber 2 so that the grains flowing down in the drying chamber 2 are exposed to the hot air for drying and dried.

During the drying operation, a problem occurs in the air blower that sucks and exhausts the hot air for drying. If the hot air for drying is no longer sucked and exhausted, the air pressure sensor 7 attached to the burner cover 6 detects the problem. If this defect is detected and the burner cover 6 is forgotten to be mounted, the wind pressure sensor 7 becomes inoperative, and thus the forgetting to mount the burner cover 6 is detected.

[0008]

According to the present invention, one wind pressure sensor 7 can detect both the presence / absence of hot air for drying and forgetting to attach the burner cover 6, thereby improving safety and reducing costs. In addition, since the wind pressure sensor 7 is provided in the vicinity of the outside air wind suction port 5, stable detection can be performed because the wind speed is high.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. The figure shows a circulation type grain dryer 8 for drying grains.
It shows. The dryer 8 has a rectangular shape that is long in the front-rear direction and is provided with a transfer gutter 10 and a ceiling plate 11 in which a transfer spiral is rotatably mounted above the machine wall 9, and kernels are stored below the ceiling plate 11. A grain storage chamber 1 is formed.

Below the storage chamber 1, a central ventilating chamber 12 having a triangular shape is provided at the central part, and left and right ventilating chambers 13 are provided on both left and right sides.
Are provided, and these central ventilation chamber 12 and left and right ventilation chambers 13,
Each partition plate 14 is provided below 13. A rhombic exhaust chamber 15, 15 is provided between the central air chamber 12 and the left and right air chambers 13, 13. The exhaust chambers 15, 15 and the central air chamber 12, Four grain drying chambers 2 are arranged in an inclined state between the left and right air blowing chambers 13, 13, and a grain joining section between the outer drying chamber 2 and the inner drying chamber 2 is provided at the junction. The feed valves 16, 16 for feeding and flowing the particles are rotatably supported.

A grain collecting trough 3 in which a transfer spiral is rotatably provided is provided under each of the drying chambers 2 so as to communicate with each other. A burner 4 is provided in the machine wall 9 below the grain collecting gutter 3, and an air passage chamber 18 communicating with the central blower chamber 12 and the left and right blower chambers 13, 13 is provided outside the front machine wall 9. The ventilation path chamber 18 and the burner 4 are communicated with each other, and the front machine wall 9 is provided with an operating device 17 for starting the dryer 8 for each operation.

On the outside of the rear side machine wall 9, the exhaust chamber 15,
An exhaust path chamber 19 communicating with the exhaust path chamber 19 is provided.
An exhauster 21 is provided on the central rear-side exhaust fan 20. The horizontal machine wall 9 on the side where the burner 4 is mounted has an outside air inlet 5 for covering the burner 4 and sucking outside air.
A burner cover 6 provided with a cover is detachably provided, and a ventilation net 21 'is stretched over the outside air suction port 5. The outside air suction port 5 is provided near the outside air suction port 5 of the burner cover 6.
A wind pressure sensor 7 for detecting the presence or absence of outside air drawn in from the air is provided, and this wind pressure sensor 7 is configured by an actuator 22 and a switch 23 for turning on and off. When the switch 23 is turned on, the switch 23 is turned on, and it is detected that the outside air is being sucked in the on state. When the switch 23 is not turned on during operation, the outside air is sucked. Is detected, the exhaust fan 21 is detected by this detection.
And the like are detected as having failed.

When the switch 23 is not turned on during operation, it is detected that the burner cover 6 is not attached to a predetermined position.
, And the detection of the presence / absence of the outside air intake described above is performed. At the center of the bottom of the transfer gutter 10 in the front-rear direction, a supply port for supplying the transfer kernels into the storage chamber 1 is provided. Below the supply port, the grains are uniformly diffused and reduced into the storage chamber 1. And a diffusing plate 24 is provided.

The grain raising machine 25 is provided outside the front of the machine wall 9 and has a belt with a bucket conveyor 26 stretched inside. The upper end of the grain raising machine 25 projects from the start end of the transfer gutter 10. A tube 27 'is provided for communication, and a lower end is provided with a supply gutter 27 between the end of the grain collecting gutter 3 for communication. At a substantially central portion in the vertical direction of the grain raising machine 25, a grain that falls while being transported upward by the bucket conveyor 26 is subjected to pinch crushing, and the moisture for detecting the moisture of the crushed grain is received. The sensor 28 is provided.

The operation of the above embodiment will be described below. By operating the operating device 17, the grain dryer 8
, The burner 4, the moisture sensor 28, and the like are started, and the hot air generated from the burner 4 and the outside air sucked from the outside air inlet 5 of the burner cover 6 are mixed to form hot air for drying. The hot air passes through the respective grain drying chambers 2 from the central air blowing chamber 12 and the left and right air blowing chambers 13, passes through the exhaust air chamber 15 and the air exhaust path chamber 19, and is sucked and exhausted by the air blower 21, whereby the kernels are heated. The grains stored in the storage room 1
While flowing down through the drying chambers 2, it is dried by being exposed to the hot air for drying, is fed downward by the feed valves 16, 16, and flows down from the grain collecting gutter 3 through the supply gutter 27 to the grain raising machine. 25, is supplied by the lower transfer spiral, and is supplied to the bucket conveyor 2
6 and is fed into the transfer gutter 10 via the discharge tube 27 ', and is transferred and supplied from the transfer gutter 10 onto the diffusion plate 24 by the upper transfer spiral.
When the grain moisture detected by the moisture sensor 28 reaches the finish target moisture, the dryer 8 is automatically stopped by the operating device 17 to stop the drying of the grain. Is done.

At the time of this drying operation, if the burner cover 6 of the horizontal machine wall 9 on the side of the burner 4 is forgotten to be mounted, the switch 23 of the wind pressure sensor 7 is kept in the off state, whereby the burner cover is turned off. 6 is detected as being forgotten to be mounted. When the outside air is not sucked from the outside air inlet 5 of the burner cover 6, the switch 23 is actuated by the actuator 22.
, And remains in the off state without being pressed, whereby it is detected that a malfunction has occurred in the exhaust fan 21 and the like and that no outside air is being sucked.

[Brief description of the drawings]

 FIG. 1 shows an embodiment of the present invention.

FIG. 1 is a partially broken whole side view of a grain dryer.

FIG. 2 is an enlarged side perspective view of a part of the grain dryer.

FIG. 3 is an enlarged sectional view taken along the line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grain storage room 2 Grain drying room 3 Grain collecting gutter 4 Burner 5 Outside air intake 6 Burner cover 7 Wind pressure sensor

Claims (1)

(57) [Claims] 1. A grain drying chamber 2 for drying grains, and a grain collecting gutter 3 for collecting grains are provided below the upper grain storage chamber 1. A burner 4 is built in the airframe, and a burner cover 6 having an outside air suction port 5 that covers the burner 4 and sucks outside air is detachably provided on an outer portion of the burner 4. An apparatus for detecting abnormality of a grain dryer, comprising a wind pressure sensor 7 for detecting both the presence or absence of outside air passing through the burner 4 and the attachment and detachment of the burner cover 6.