JP2943378B2 - Wind pressure sensor detection stop device in horizontal embedding type 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 improvement of a grain filling type grain drying machine in which grains are stretched from a grain filling port and dried.

[0002]

2. Description of the Related Art A conventional horizontal-grain type grain dryer is provided with a horizontal-gap opening which can be opened and closed by an opening / closing valve on a side wall of the main body of the dryer. While drying with hot air, the drying operation is stopped when the wind pressure sensor detects that the wind pressure of the hot air has fallen below a predetermined value during the drying operation.

[0003]

In the above-mentioned conventional dryer, when the on-off valve is opened during the drying operation and grain is introduced from the horizontal insertion port, the air pressure of the hot air is abnormally reduced due to a decrease in airtightness in the dryer. The wind pressure sensor detects that
This stops the drying operation. Therefore, it is necessary to restart the operation by re-operating the operation switch after the grain is stuck, and there is a disadvantage that the operation becomes complicated.

An object of the present invention is to solve the above-mentioned drawbacks and to provide an apparatus which can smoothly work without stopping the drying operation when the grain is inserted by opening the horizontal filling port during the drying operation. I do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a dryer having a horizontal inlet which can be opened and closed by an on-off valve on a side wall of a main body of the dryer. While circulating the inside of the dryer and drying with hot air, when the wind pressure sensor detects that the wind pressure of the hot air has become equal to or less than a predetermined value during the drying operation, in a horizontal penetration type grain dryer that stops the drying operation, When the on-off valve is in the open state during the drying operation, a wind pressure sensor detection stopping means for disabling the wind pressure sensor is provided.

[0006]

When the horizontal opening is opened by operating the on-off valve during the drying operation, the wind pressure sensor detection stopping means disables the wind pressure sensor while the horizontal opening is open, so the drying operation is not stopped. To be continued. Thereafter, when the horizontal inlet is closed by operating the on-off valve, the wind pressure sensor returns to the detection state.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a dryer to which the embodiment of the present invention is applied. In the figure, reference numeral 1 denotes four drying chambers connected below a storage chamber 2, and each drying chamber 1 has air permeability. Mesh board 3
Are arranged side by side on the left and right. A hot air chamber 4 is adjacent to one side of each drying chamber 1, and an exhaust air chamber 5 is adjacent to the other side. In this dryer, a hot air chamber 4
And hot air chambers 4 along the left and right machine walls 6, 7.
To form

The hot air chambers 4 are connected in common at their starting ends, and a burner (not shown) as a heat source is arranged at the end of the common connecting portion. In addition, each exhaust chamber 5 has a common end connected thereto, and an exhaust fan (not shown) is arranged at the end of the common connection portion. Further, in the hot air chamber 4 located at the center, a wind pressure sensor 13 having a contact which is turned off when the wind pressure of the hot air falls below a predetermined value for some reason during the drying operation is arranged.

Below the drying chambers 1, there are arranged rotary valves 9 for feeding out the grains in each drying chamber 1 to a grain collecting chamber 8. A screw conveyor 10 is provided at the bottom of the grain collection room 8, and the end of the screw conveyor 10 is connected to an elevator (not shown). The grain discharged from the grain collection room 8 by the screw conveyor 10 is transferred to the storage room 2 via an elevator.
It is configured to return to.

As shown in FIG. 1, a storage chamber 2 is formed on a part of a machine wall 7 forming a side wall of the right hot air chamber 4 via the hot air chamber 4.
And a horizontal insertion port 11 for inserting grain therein.
Is openable and closable by an inlet opening / closing valve 12. Horizontal bay 1
1 is provided with an on-off valve detection switch 14 having a contact which is turned on when the inlet opening / closing valve 12 is opened and turned off when the inlet opening / closing valve 12 is closed.

Next, an embodiment of the wind pressure sensor detection stop device according to the present invention will be described with reference to FIG.

A wind pressure sensor 13 is connected to an input side of a CPU 16 via an input circuit 15. And wind pressure sensor 1
The contact of the on-off valve detection switch 14 is connected in parallel to the contact 3. The output side of the CPU 16 is connected via an output circuit 17 to a burner 18 of the dryer and a display 19 for performing a display as described later. In addition, sensors and the like related to the control of the dryer are connected to the input / output side of the CPU 16 in addition to the above.

In the embodiment constructed as described above, the filling port opening / closing valve 12 is opened, the grain is loaded from the horizontal filling port 11, and then the filling port opening / closing valve 12 is closed to start the drying operation. During the drying operation, the contact point of the on-off valve detection switch 14 is in a solid line state as shown in FIG.
3 is in operation. The contact point of the wind pressure sensor 13 is turned on as indicated by a dashed line when the wind pressure is equal to or higher than a predetermined value and is normal, and when the airtightness in the dryer is reduced for some reason and the wind pressure falls below a predetermined value, a solid line is indicated. And the combustion of the burner 18 is stopped.

On the other hand, during the drying operation, the inlet opening / closing valve 1
When the grain is newly inserted from the horizontal insertion port 11 by opening the opening 2, the on / off valve detection switch 14
Since the contact point is in the state of a dashed line as shown in FIG.
The contact of the wind pressure sensor 13 is short-circuited and the wind pressure sensor 1
3 is inactive. Accordingly, the wind pressure sensor 13 does not erroneously detect the opening operation of the on-off valve 12, and the CPU 16 does not stop the operation of the burner 18 due to the erroneous detection, so that the drying operation continues without stopping.

Here, if the combustion of the burner 18 is continued under the condition that the inlet opening / closing valve 12 is open, hot air is not exhausted and the inside of the dryer becomes overheated, which is not preferable. Therefore, during this period, the fuel supply to the burner 18 is reduced, and the burner 1 is closed when the inlet opening / closing valve 12 is closed.
The CPU 16 controls a fuel supply pump (not shown) so that the fuel supplied to the fuel supply 8 is restored. Further, when the inlet opening / closing valve 12 is opened, the timer starts counting, while the opening / closing valve 12 is open, the counting is continued, and when the counting is performed a predetermined number of times, the display 19 and the alarm ( (Not shown), the operator is informed that "Please close the on-off valve 12". This prevents the on-off valve 12 from being left open due to an operator's mistake.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the detection of the wind pressure sensor 13 is stopped mechanically. That is, the wind pressure sensor 13
Is provided at a predetermined position of the hot air chamber 4 connected to the horizontal inlet 11, and the detecting piece fixing plate 20 which makes the detecting piece 13A of the wind pressure sensor 13 undetectable when the inlet opening / closing valve 12 is opened.
Is attached to the inlet opening / closing valve 12. With such a configuration, the detection of the wind pressure sensor 13 can be stopped while the inlet opening / closing valve 12 is in the open state, as in the embodiment shown in FIGS. 1 and 2. In FIG. 3, FIG.
The same parts as those described above are denoted by the same reference numerals and description thereof is omitted.

[0019]

According to the present invention, the wind pressure sensor is made inoperative when the inlet opening / closing valve is opened during the drying operation. This has the effect that the work can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dryer to which the present invention is applied.

FIG. 2 is a block diagram of a wind pressure sensor detection stop device.

FIG. 3 is a longitudinal sectional view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Horizontal inlet 12 Inlet open / close valve 13 Wind pressure sensor 14 Open / close valve detection switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-34482 (JP, A) JP-A-3-233286 (JP, A) Jpn. Field (Int.Cl. ⁶ , DB name) F26B 17/14 F26B 21/10 F26B 25/00

Claims (1)

(57) [Claims] 1. A side wall of a main body of a dryer is provided with a horizontal inlet which can be opened and closed by an on-off valve. When a grain is inserted from the horizontal inlet, the grain is dried by hot air while circulating in the dryer and drying operation is performed. When the wind pressure sensor detects that the wind pressure of the hot air has become equal to or lower than a predetermined value, in a horizontal stretch-type grain dryer that stops the drying operation, the opening and closing valve is in the open state during the drying operation. A wind pressure sensor detection and stop device provided with a wind pressure sensor detection and stop means for disabling the wind pressure sensor.