JPH0486476A - Circulation type grain drying device - Google Patents

Abstract

PURPOSE:To improve the operability of the discharging of grains by a method wherein a control means, closing a shutter belt and a discharging shutter ordinarily and opening the shutter belt and the discharging shutter upon discharging grains, is provided. CONSTITUTION:A discharging shutter 74 is arranged in a grain discharging port 72 while the closing or the opening of the grain discharging port 72 is effected by the opening or closing movement of the same. A gap 78 is formed between a shutter drum 50 and respective discharging air passage bulk-heads 28 and a shutter belt 80 is arranged so as to be capable of being closed or opened. A plurality of switches for operating a drying device are arranged on an operating panel 88 and a control circuit is accommodated in the operating panel 88. The discharging shutter 74 is closed by the operation of a control panel 88 to open the grain discharging port 72 while the shutter belt 80 is moved about a shaft 86 so as to bring a gap 78 between the shutter drum 50 and respective air discharging bulkhead 28 into opened condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circulation type grain drying apparatus, and more particularly to a circulation type grain drying apparatus in which grain is fed out and circulated by a drum drum disposed at the lower part of a grain flow path.

[Prior Art] As shown in FIG. 5, a general circulation type grain drying device is provided with a plurality of flow passages 112 at the bottom of a grain tank 110, and the grains drain moisture while flowing down the flow passages 112 naturally. It is meant to be removed. The grains flowing down this flow path 112 are alternately delivered downward from the flow path 112 by the action of a shutter drum 114 that is arranged at the lower part of the flow path 112 and rotates reciprocatingly, and is further conveyed by a screw conveyor 116, an elevator 118, etc. After being conveyed by the device to the top cloth of the device, it is fed into the grain bin 110 again. Through this cycle, moisture is gradually removed from the grains and the grains are dried.

After the grain drying process is completed, the shutter drum 11
4. It is configured to be transported again to the upper part of the apparatus by the screw conveyor 116 and the elevator 118, and then discharged from the apparatus through the discharge port 120 provided at the upper part of the elevator 118.

By the way, in the above-mentioned conventional apparatus, when the grains are discharged from the apparatus after the completion of the drying process as described above, the shutter drum 114 is operated to first feed the grains out of the grain tank 110 and then transport the grains sequentially from the discharge port 120. Therefore, it took a relatively long time to complete discharging all the grains in the device. For this reason, the workability of grain discharge is relatively poor, and there has been a strong demand for improvement.

In this case, a possible countermeasure is to increase the reciprocating rotation speed of the shutter drum 114 to increase the amount of grain fed out and shorten the discharge time, but an expensive inverter or the like is required to control the reciprocating rotation speed of the shutter drum 114. This is necessary and costs high, and there is also a limit to the amount of grain fed out by the shutter drum 114.

[Problems to be Solved by the Invention] In view of the above, it is an object of the present invention to provide a circulating grain drying device that can discharge the grains in the device in a single hour and improve the workability of grain discharge.

[Means for Solving the Problems] A circulating grain drying apparatus according to the present invention includes: a shack tram that is disposed at the lower part of a grain flow path communicating with a grain tank and sequentially feeds out grains downward by reciprocating rotation; a conveying means provided between the shack drum and the grain tank, for conveying the grain fed out from the shutter drum to the grain vat; A circulating grain drying device comprising: a discharge shutter for discharging the grain to the outside; a shutter belt disposed to close and open a gap formed between a lower part of the grain flow path and the shutter tram; The present invention is characterized by comprising a control means for normally keeping the shutter belt and the discharge shutter in a closed state, and for opening both the shutter belt and the discharge shutter at the time of grain discharge.

[Function] In the circulating grain drying device with the above configuration, when discharging grain,
By the operation of the shutter drum, the grains are not only fed downward, but also fall and are released from the shutter belt between the lower part of the grain flow path and the shutter drum. The grains discharged from the shutter drum and the shutter belt are conveyed by the conveying means to the discharge shutter and discharged from the discharge shutter.

Therefore, the grains in the device can be discharged in a short period of time, and the workability of grain discharge is improved. Further, grains do not remain in the lower part of the grain flow path.

[Embodiment] FIG. 1 shows an overall cross-sectional view of a grain drying apparatus IO according to the present invention, and FIG. 2 shows a cross-sectional view taken along the line ■■ in FIG. 1. In addition, Fig. 3 also shows a grain drying device 10.
An overall perspective view is shown, and FIG. 4 is an enlarged sectional view of the main part of FIG. 1.

The body 12 of the grain drying device 10 includes a pair of left and right side walls 14,
The outer frame of the grain drying apparatus 10 is constituted by a front wall 16, a rear wall 18, a ceiling wall 20, and a bottom wall 22, and is shaped like a box that is tall in the top and bottom and long in the front and back.

The upper inner cavity of the fuselage 12 serves as a grain tank 24.

Further, a drying section 26 is provided at the bottom. Drying section 26
A pair of ventilated air exhaust passage partition walls 28 are formed in a funnel shape when viewed from the front (FIG. 1) and slope downward from the inner surface of the vertically approximately central portion of the left and right mechanisms 14 toward the horizontally central portion. (between the front wall 16 and the rear wall 18 in the longitudinal direction of the aircraft)
The rack has been handed over. An air exhaust passage 32 is formed between the air exhaust passage partition wall 28 and the side wall 14.

On the inboard side of the exhaust passage bulkhead 28, a pair of breathable air guide passage bulkheads 34 that are parallel to the exhaust passage bulkhead 28, that is, inclined with respect to the side wall 14, are arranged in the longitudinal direction of the fuselage in the same manner as the exhaust passage bulkhead 28. The rack has been handed over. The upper part of the air guide partition wall 34 is bent toward the inside of the fuselage, and the upper end parts are continuously connected to each other. Therefore, the portion surrounded by the opposing air guide path partition walls 34 forms a diamond-shaped air guide path 38 when viewed from the front.

Between the upper part of the air exhaust path partition wall 28 and the upper part of the air guide path partition wall 34,
A pair of auxiliary air guide passages 4 are formed by a pair of left and right air guide passage partition walls 40.
4 is formed into a rhombic shape in front view, similar to the air guide path 38. Between the air guide path and the air exhaust path is a flow path 46 through which the grain in the grain tank 24 flows down.

Ends of the air exhaust passage partition wall 28 and the air guide passage partition wall 34 on the rear wall 18 side are connected to an internal wall 47 as shown in FIG. For this reason, the ends of the air guide path 38 and the downstream path 46 on the rear side of the fuselage are shielded. Therefore, the grain in the flow path 46 is transferred to the air guide path 38.
．． The drying air flows downward through the flow path 46 while receiving the drying air sent from the air outlet 44, and the sent drying air absorbs moisture from the grains, dries the grains, and is then discharged from the exhaust air path 32.

An air guide communication passage 64 is formed in the front wall 16, and a burner 66 for generating drying air is disposed at the lower end of the air guide communication passage 64. This air guide passage 64 communicates with one longitudinal end of the air guide passage 38.44 in the fuselage 12. For this reason,
The drying air generated by the burner 66 is transferred to the air guide passage 64.
They are sent together through the air guide channels 38 and 44.

A blower mounting stand 69 is arranged on the rear wall 18, and an air exhaust communication passage 6 that communicates with the air exhaust passage 32 through the internal wall 47.
8 is formed. A suction exhaust fan 70 for exhausting air is disposed in the center of the exhaust communication passage 68. For this reason,
The suction/exhaust fan 70 sucks the drying air from the burner 66, sends it from each air guide path to the air exhaust path, and discharges it to the outside of the grain drying apparatus 10 via the air exhaust communication path 68.

Each lower end of the flow passage 46 is connected to the shutter drum 50 via an outlet 48 formed between the lower end inclined portion of the air exhaust passage partition wall 28 and the air guide passage partition wall 34 .

The shutter drum 50 has a hollow cylindrical shape with a horizontal axis, and a slit-like notch with a predetermined width along the axial direction is formed in a part of the outer periphery. The shutter drum 50 rotates around its axis so that the notch and the outlet 48 face each other, so that the grains in the flow path 46 flow into the shutter drum 50 through the notch, and further, the shutter drum 50
0 rotates so that the notch is positioned downward, so that the grains that have flowed in can be discharged.

Below the shutter drum 50, there is a pair of sink plates 52 that taper downward toward the center between the mechanisms 14.
is located. Further, a loading hopper 62 is provided at the bottom of the mechanism 14, and grain can be loaded into the grain drying apparatus 10. Therefore, the grains discharged from the shutter drum 50 and the grains loaded from the loading hopper 62 are conveyed to a substantially central portion between the mechanisms 14 by the loading sink plate 52.

A lower screw conveyor 54 for conveying grain is disposed at each lower end of the pouring sink plate 52. The lower screw conveyor 54 is disposed in the longitudinal direction of the grain drying device 10, and is configured to send out grains that have entered between the spiral blades on the outer periphery toward the front wall 16 side.

An elevator 56 is erected on the outside of the front wall 16 so as to be connected to the lower screw conveyor 54 and to receive the transported grains. Inside this elevator 56, grain transport packets 57 are attached to an endless belt at regular intervals.
The grains sent out from the lower screw conveyor 54 and deposited at the lower end can be lifted and conveyed to the top of the grain drying device 10.

One end of an upper screw conveyor 58 corresponds to the upper end of the elevator 56, and is adapted to receive the lifted and conveyed grain. The other end of the upper screw conveyor 58 extends to the center in the longitudinal direction of the grain drying device 10, and a rotary equalizer 60 having a vertical axis is arranged directly below the other end of the upper screw conveyor 58. Therefore, the grains conveyed to the upper center of the grain drying device 10 by the upper screw conveyor 58 fall onto the rotary equalizer 60, and when the rotary equalizer 60 rotates, centrifugal force is applied to the grains in the grain tank in the grain dryer 10. It will be distributed evenly within 24.

The upper end of the elevator 56, that is, the upper screw conveyor 5
A grain discharge lower 2 is provided below one end of the grain discharger 8 .

A discharge shutter 74 is disposed within the grain discharge lower 2. The discharge shutter 74 can close or open the grain discharge lower 2 by opening and closing, and in the open state can discharge the grain lifted and conveyed by the elevator 56 out of the apparatus.

A discharge hose 76 is connected to the grain discharge lower 2,
The grains that have been discharged after drying can be taken out to a desired position.

On the other hand, as shown in detail in FIGS. 4(A) and 4(B), there is a gap 78 between the shutter drum 50 and each exhaust passage partition wall 28 (i.e., at the tip of the outlet 48). A shutter belt 80 is arranged to be able to close or open this gap 78.

The shutter belt 80 is made of rubber or synthetic resin in the form of a band plate, and is integrally held between a stay fitting 82 and a holding fitting 84. The shaft 86 is attached to the stay fitting 82.
The shaft 86 is rotatably supported by the front wall 16 and the rear wall 18. The shank bell) 80 can close or open the gap 78 between the shutter drum 50 and each exhaust passage partition wall 28 by opening and closing, and in the open state, the grains flowing down the flow passage 46 can be closed or opened. The lower screw conveyor 5 is directly dropped without flowing into the shank drum 50.
It can be sent to 4.

An operation panel 88 serving as a control means is arranged on the front side (front wall 16) of the body 12. The operation panel 88 is equipped with a plurality of switches for operating the drying device, and has a built-in control circuit (not shown), which controls the circulation system (
Shutter drum 50, lower screw conveyor 54, elevator 56, upper screw conveyor 58, rotary equalizer @60
), and can also drive the burner 66 and the suction/exhaust fan 70. In addition, the operation panel 88 is
The discharge shutter 74 and the shutter belt 80 can be imitated and operated. In this case, the discharge shutter 74 and the shutter belt 80 are both normally in a closed state, and are both opened by operating an operation panel 88 during grain discharge.

Next, the operation of the grain drying apparatus 10 having the above structure will be explained.

Among the circulation system devices of the grain drying apparatus 10, the lower screw conveyor 54, the elevator 56, the upper screw conveyor 58, and the rotary equalizer 60 are driven to load the grain. and a stake hopper 62 on the lower side of the grain drying device 10.
is opened and the grain is loaded into the fuselage 12. The loaded grain is guided by the loading sink plate 52 and transferred to the lower screw conveyor 5.
4 Transported to the installation position. The transported grains are sequentially transported to the elevator 56 side by the lower screw conveyor 54,
Furthermore, it is scooped up by a packet 57 of a rotating elevator 56 and lifted and conveyed.

The grain lifted and conveyed above the machine body 12 by the elevator 56 is sent to the upper center of the machine body 12 by the upper screw conveyor 58, and is stored in the grain tank 24 in the machine body by the rotary equalizer 60.

In this case, since the discharge shutter 74 is moved to close and the grain discharge lower 2 is in a closed state, the grain lifted and conveyed by the elevator 56 is not discharged from the grain discharge lower 2 to the outside of the apparatus.

Furthermore, after the completion of tensioning, the shack drum 50 is rotated to feed out the grain. Then, when the burner 66 connected to the fuselage 12 is ignited and the suction/exhaust fan 70 is driven, the dry air is sucked into the air guide passage 64.
The air is sent to the air guide path 38 through the air. The drying air sent into the air guide path 38 passes through the air guide path partition wall 34 and is directly supplied to the grains in the flow path 46 . This is where the grain is dried. The drying air after absorbing moisture from the grains is sent to the ventilation duct partition wall 2.
8, the air passes through the air exhaust passage 32, reaches the air exhaust communication passage 68, and is discharged to the outside of the grain drying apparatus 10.

On the other hand, the grains in the flow path 46 pass through the outlet 48 due to the rotation of the shutter drum 50 and are again guided and conveyed by the loading flow plate 52. The conveyed grain is subjected to the above-described circulation process repeatedly within the machine body 12, as necessary, until a desired moisture content is reached.

After the drying process is completed, a grain discharge process is performed. That is, by operating the operation panel 88, the discharge shutter 74 is moved to close, and the grain discharge lower 2 is opened.
The shutter belt 80 is moved around the shaft 86 to open the gap 78 between the shutter drum 50 and each exhaust passage partition wall 28 as shown in FIG. 4(B). As a result, the grains flowing down the flow path 46 are transferred to the shutter drum 50.
Not only is the liquid flowing into the hole and sent downward by the operation of the shutter drum 50, but also it is directly dropped downward through the gap 78 and sent to the lower screw conveyor 54.

Shank drum 50 and gap 78 (shutter belt 8
The grains discharged from 0) and sent to the lower screw conveyor 54 are again lifted and conveyed by the elevator 56 and then taken out from the grain discharge lower 2.

In this way, the grain in the grain tank 24 is not only fed out by the shutter drum 50, but also by the shutter belt 8.
By opening 0, the grains can be dropped and discharged even through the gap 78, so that the grains in the device can be discharged in a short period of time, improving the workability of grain discharge. Moreover, no grain remains in the lower part of the flow path 46, that is, in the outlet 48.

[Effects of the Invention] As explained above, the grain drying device according to the present invention has an excellent effect in that the grain in the device can be discharged in a single hour, and the workability of grain discharge is improved.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view of the grain drying device according to the present invention, and FIG.
The figure is a sectional view of the grain drying device along the line ■-■ in Figure 1, Figure 3 is an overall perspective view of the grain drying device, and Figures 4 (A) and 4 (B) are the operating states of the shutter belt. FIG. 1 is an enlarged sectional view of a main part, and FIG. 5 is a partially cutaway front view showing a conventional grain drying apparatus. 10... Grain drying device, grain tank, flow path, outlet, shutter drum, lower screw conveyor (transporting means), elevator (transporting means), upper screw conveyor (transporting means), grain discharge port, discharge shutter, gap , shutter belt, operation panel (control device). Figure 2

Claims (1)

[Claims] (1) A shutter drum arranged at the lower part of a grain flow path communicating with a grain tank and reciprocatingly rotates to sequentially feed out the grains downward; and a shutter drum provided between the shutter drum and the grain tank to let out the grains from the shutter drum. A circulating grain drying device comprising: a conveying means for conveying the grains to the grain tank; and a discharge shutter disposed in the middle of the grain conveying path by the conveying means and discharging the grains out of the device when in an open state. a shutter belt disposed to be able to close and open a gap formed between a lower part of the grain flow path and the shutter drum; A circulating grain drying device comprising: control means for opening both the shutter belt and the discharge shutter during discharge.