JPS5843380A - Air blast-discharge changeover device in alternate ventilation drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching device W for blowing and exhausting air in an alternate ventilation dryer such as a radial bin type dryer.

In radial bin type alternating dryers and dryers, where ventilation is provided inside and outside the double cylindrical wire mesh, and the darkness of the mesh is used as the drying chamber, two ventilation paths are conventionally branched from the air path with a blower. An exhaust port was provided in each ventilation path, and a valve was provided at each branch point and exhaust port, and the WalWI of these valves was used to switch between blowing and exhausting air, but the operation was complicated.

So, in order to eliminate this drawback, the internal and external ventilation passages are exhausted using the same exhaust system, JIl shell,
Air blowing and ventilation in an alternating ventilation dryer that can easily switch and change the air blowing and exhausting in one operation per stroke.
An exhaust ventilation switching device was proposed. As shown in FIG.
．． Is the exhaust side 5 provided at the branch point? The exhaust cylinder 5 is
passages 3 and 41, openings 6 and 7 L',,p'''. At the branch point, both openings 5 62.7 and ventilation passages 3..4
A damper 8 is attached to open and close the damper.

When the damper -8 closes the opening 7 of the exhaust air cylinder 5 and the ventilation passage 3, that is, when blowing with the damper 8 horizontal as shown by the solid line in FIG. 4, is subjected to drying, is sent to the ventilation passage 3, and is sent to the exhaust air cylinder 5 through the opening 6 of the exhaust air cylinder 5. Next, the damper 8 is closed so that the opening 6 of the exhaust air cylinder 5 and the ventilation passage 4 are closed, that is, as shown in the chain S in FIG. ! When air is blown in the upright state, the hot air passes through the ventilation passage 3, is dried, is sent to the ventilation passage 4, and is sent to the exhaust air cylinder 5 through the opening 7 of the exhaust air cylinder 5. In such a ventilation/exhaust switching system, the ventilation is A-E as shown in Figure 1.
The direction was changed at right angles at five points, and the change in direction was particularly remarkable near the exhaust wind cylinder, resulting in a very large pressure loss.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a ventilation/exhaust switching device that allows easy operation of alternate ventilation and reduces pressure loss.

Hereinafter, embodiments of An, ·i, and Imei will be described based on the drawings.

Figures 2 and 3 show an alternate ventilation dryer according to an embodiment of the present invention.
A ventilation passage 91, a ventilation passage 10, and an exhaust passage 11 are provided at a lower position of the drying chamber 21 so as to branch 4 at approximately the center of the mushroom, and an opening 12 is provided at the branch portion. The ventilation passage 10 leads to the outer wire mesh 13 of the double cylindrical wire mesh and the peripheral ventilation shell 15 which is the first ventilation shell located in the darkness of the tuck 14, and 811012 leads to the second ventilation shell inside the inner wire mesh 16. It communicates with the central ventilation barrel 17.

The ventilation passage 9 and the exhaust passage 11 are located on opposite sides of the branch, and there are ventilation passages 10 and openings 12 on the left and right sides that are perpendicular to the ventilation passage 9.
is located. At this branch part, one of the ventilation passage 10 and the opening 12 communicates with the ventilation passage 9, and the ventilation passage 10 or the opening 12, which is closed from the ventilation passage 9, communicates with the exhaust passage 11. A damper 18 is rotatably provided. 19 is a second damper provided on the side wall of the ventilation passage 10, and 20 is a sweep floor.

Since the present invention is configured as described above, the damper 1
In the state where 8 connects the blower ← 9 and the ventilation passage 10, that is, in the state shown in FIG.
8 into the ventilation channel 10 , through the peripheral recess 15 for drying, and from the drying chamber 21 through the central ventilation barrel 17 into the opening 12 and into the exhaust channel 11 . damper 18
In the state where the air flow path 9 and the opening 12 are connected, that is, in the state shown in FIG.
It enters the opening 12 along the central ventilation cylinder 17 and is subjected to drying.From the drying chamber 21, it passes through the peripheral ventilation cylinder 15, enters the ventilation passage 1-0, and is sent to the exhaust passage 11. In addition, when discharging grains after drying, if there is a small amount of grains and it becomes difficult to discharge them due to the weight of the grains themselves, the second damper 19 is switched to inside the ventilation path 9 as shown in FIG. Then, the air no longer communicates with the ventilation path 10 and the opening 12, and is sent ffl from the sweep floor 20 into the drying room 21 through the hole opened by the second damper 19, and all grains can be discharged. can.

□ As described above, according to the present invention, it is possible to switch between blowing and exhausting air simply by rotating one damper, and it is possible to easily perform alternate ventilation. In addition, openings were provided at the branching parts of the ventilation duct, ventilation duct, and exhaust duct, and the openings were opened directly into the ventilation shell, so the second! ! As shown by I, the direction is changed to one corner at two places A and B, and compared to the proposed one,
Since the pressure loss is small, the power of the blower fan can be reduced, making it economical.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a radial bin type alternating ventilation dryer equipped with the proposed air blow/exhaust switching device. FIG. 15 is a transparent perspective view showing a state in which dry II grains are being discharged in an embodiment of the present invention. 9... Ventilation duct, 10... Ventilation duct, 11... Exhaust duct, 12... Opening, 13... Outer wire mesh, 14...
Tank, 15... Surrounding ventilation shell, 16... Inner wire mesh, 17... Central ventilation shell, 18... Damper, 19.
...Second damper, 20...Sweep floor. - Patent Applicant I Fi Bamboo Seisakusho Representative Patent Attorney Tsukasa Takemoto Matsu No. 2 Figure 3 Figure 4r! l

Claims (1)

[Claims] An alternate ventilation dryer is provided with a first ventilation trunk and a bamboo ventilation trunk 2 through a drying chamber, and a ventilation passage 1 and an exhaust passage are provided, respectively, which branch at a branching part. an opening is provided, the ventilation passage is located on the opposite side of the exhaust passage and the branch part; the ventilation passage and the opening are located on both sides of the ventilation passage; Providing a damper in which either one of the ventilation passage and the opening communicates with the exhaust passage, and one of the opening and the ventilation passage communicates with the exhaust passage;
An air blow/exhaust switching device for an alternate ventilation dryer, wherein the ventilation passage is connected to the first ventilation cylinder, and the opening is connected to the second ventilation cylinder.