JPH06336341A - Feed dispersing device for grain storage facility - Google Patents

Abstract

PURPOSE:To provide a feed dispersing device capable of feeding grains uniformly in a grain storage tank. CONSTITUTION:A dispersing fixture 22, rotatably supported about the vertical shaft center P so as to disperse grains, accepted from the above, released from a side part into a grain storage tank, is driven to be rotated by an inverter- provided electric motor 23, connected to a control panel 25, and further speed change-controlled periodically by a prescribed characteristic. The grains are accumulated in the vicinity of the center at the time of low speed rotation and dispersed to the periphery at the time of high speed rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dispersing grains from above in grain storage tanks of grain storage facilities such as rice centers and country elevators.

[0002]

2. Description of the Related Art Conventionally, as a squeezing disperser provided on the ceiling of a grain storage tank, a disc-shaped or cylindrical disperser is rotated at a constant speed around the axis of the vertical axis, and the grain is fed from above the center of the grain. It was configured to disperse and drop by dropping.

[0003]

In the above-mentioned conventional dispersing device, unevenness in the dispersion accuracy is likely to occur depending on the conditions such as the supply amount per hour, the height of grain deposition, and the specific gravity of grain.
In particular, in a dry storage facility in which a floor surface is used as a ventilation surface, where there is unevenness in dispersion, there is a problem in that unevenness in drying tends to occur because the wind easily escapes in a portion where the deposition height is low. It is an object of the present invention to provide a squeeze dispersion device that can solve the above-mentioned problems of the conventional device.

[0004]

In order to achieve the above object, the present invention is characterized in that a disperser rotatably supported about a longitudinal axis for discharging grains received from above from a side is provided. The point is that the shift control is periodically performed via the shift control means. Further, preferably, the dispersing tool is provided with a plurality of outlets directed outward and downward at a predetermined angle with respect to the longitudinal axis.

[0005]

According to the above structure, when the disperser is rotated at a low speed, the grains are accumulated near the center of the storage tank, and when rotated at a high speed, the grains are diffused and accumulated around the storage tank. At this time, the rotation speed of the disperser, the shift width, and the shift cycle are changed according to the conditions such as the amount of supply per hour, the height of grain deposition, the specific gravity of grain, etc. Can be included.

[0006]

Therefore, according to the present invention, regardless of various conditions, it is possible to make the deposition height uniform, and in particular, in a storage tank which is ventilated for drying, local air leakage is prevented. Good ventilation without unevenness can be performed by performing no ventilation.

[0007]

First, the principle of the present invention will be described. Figure 1
As shown in, to rotate the disperser 22 about the vertical axis P and study the scattering of grains from the outlet 22b,
The discharge angle of the discharge port 22b is θ, and the ejection speed of the grain is v (m
/ s) and the gravity acceleration is g (m / s ² ), the fall height h (m)
, And the reaching distance r (m) are h = v _y t + 1/2 · g t ² (vertical velocity v _y = v ·
sin θ) r = v _x t (horizontal speed v _x = v ・
cos θ) and the radius from each section to the center of r ₁ , r ₂ , r ₃ ,
The r _4, r ₅ and calculates the flight out velocity v to reach, by rotationally driving the dispersion unit 22 in the jumping speed v the rotational speed as obtained, scattering grain in each segment - segment Can be supplied. The speed at which the grains are ejected from the disperser 22 is affected by various conditions.
It is considered to be substantially proportional to the rotation speed of the above, and by controlling the gear rotation speed of the disperser at the above ratio, it is possible to stick to each section. In addition, the area of each section is A ₁ ,
Assuming A ₂ , A ₃ , A ₄ , and A ₅ , A ₂ = 3 A ₁ A ₃ = 5 A ₁ A ₄ = 7 A ₁ A ₅ = 9 A ₁ , and the radius r to the center of the section and each section The area of is directly proportional. Therefore, assuming that the time spent to pour grain to a predetermined thickness in a section is t ₀ seconds, in order to pour grain of the same thickness in each section, 3 t ₀ seconds in the section, 5 t ₀ seconds in the section, 7t ₀ seconds, 9t in classification
_It is necessary to take a staking time of ₀ seconds. as a result,
For example, as shown in FIG. 4, the rotation speed of the dispersion tool 22 is changed stepwise, so that each section
It is thought that it will be possible to carry out grain stakes at the same height. In reality, since the drop height varies depending on the grain accumulation height, it is necessary to set the number of rotations that scatters up to the sections according to the grain accumulation height.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a grain storage / drying facility, which is an example of a grain storage facility equipped with a squeezing dispersion device. The grain storage tank 1 of this grain storage / drying facility is formed in a cylindrical shape, and a grain input port 3 provided with a squeezing dispersion device 2 is provided on the ceiling thereof, and the grain input to the raw material input hopper 4 is It is adapted to be supplied to the grain input port 3 via the lifting device 5 and the lateral feed conveyor line 6. A floor surface 7 configured as a ventilation surface is provided at a lower portion of the storage tank 1, and an air exhaust chamber 8 is arranged below the ventilation floor surface 7 and an outside air introduction port 9 is provided at an upper portion of the storage tank 1.
A temperature control air intake duct 10 is provided. or,
In the lower part of the storage tank 1, an unloading auger 11 is equipped, and in the air exhaust chamber 8, a transfer device 12 for unloading the grains taken out from the center of the aeration floor surface 7 is equipped.
A blower 13 is communicatively connected to the air exhaust chamber 8, and the storage tank 1
The air introduced from the outside air introduction port 9 is sucked and flowed downward to dry the accumulated grains 14 in the storage tank 1. The electric motor 15 with an inverter that drives the blower 13 is configured to be speed-controlled via the control device 16. The control device 16 is connected to a calculation recording device 18 connected to a weighing device 17 provided in the raw material feeding hopper 4 and a wind pressure sensor 19 arranged at an appropriate position in the air exhaust chamber 8, and these calculations are performed. The blower 1 based on the information from the recording device 18 and the wind pressure sensor 19.
3 speed control is performed.

As shown in FIGS. 2 and 3, the swelling dispersion device 2 supports a rotary shaft 21 rotatably around a vertical axis P in a grain input port 3 formed in a downwardly tapered cylindrical shape. However, the dispersion tool 22 is attached to the lower end of the rotary shaft 21, and the rotary shaft 21 and an electric motor 23 with an inverter arranged outside the grain inlet 3 are interlocked by a transmission chain 24. Has been done. The disperser 22 has a rectangular opening 22a at the upper end facing the grain input port 3 and a pair of discharge ports 22b opening at the same downward inclination angle.
Is formed in a diagonal position.

An electric motor 23 with an inverter is connected to a control panel 25 so that the dispersion tool 22 can be automatically changed in the range from the lowest rotation speed n ₁ to the highest rotation speed n _{2 according} to the characteristics shown in FIG. Is controlled to the maximum speed n ₂
Is changed according to the pile height.

In practice, 100 kg (or 200 kg), for example, is intermittently discharged from the measuring device 17, and the squeezing by the squeezing dispersion device 2 is also intermittent, so that more accurate squeezing is performed. In order to
As shown therein, it is desirable to lock the rpm control for t ₁ while the grain supply is interrupted.

[Other Embodiments] The present invention can also be implemented in the following modes. (1) Means for measuring the amount of swelling per unit time and the deposition height are provided, and the optimum rotation speed control characteristic is automatically selected based on the measurement information. (2) The downward inclination angle of the dispersion tool 22 is adjustable and adjustable. (3) A rotation speed control characteristic that smoothly and continuously changes is set by approximating the rotation speed control characteristic shown in FIG.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the scattering operation.

FIG. 2 is a sectional view showing the principle configuration.

FIG. 3 is a sectional plan view of the inside of the storage tank.

FIG. 4 is a diagram showing a basic rotational speed control characteristic of a dispersion tool.

[Fig. 5] Schematic diagram of the grain dry storage facility

FIG. 6 is a plan view of a squeezing dispersion device.

FIG. 7 is a side view of the dispersal device for tensioning with a part thereof cut away.

FIG. 8 is a partially cutaway front view of the tensioning dispersion device.

FIG. 9 is a diagram showing a rotation speed control characteristic of a dispersion tool.

[Explanation of symbols]

 22 Disperser 22b Discharge port P Vertical axis

Claims (2)

[Claims] 1. A gear shifting control means cyclically shift-controls a dispersing device (22) rotatably supported around a vertical axis (P) so as to discharge grains received from above from a side portion. Dispersing device for stake in grain storage facility configured to do so. 2. The grain storage facility according to claim 1, wherein the disperser (22) is provided with a plurality of outlets (22b) directed outward and downward at a predetermined angle with respect to the longitudinal axis (P). Dispersing device for stakeout.