JPS59223632A - Granule eccentric-flow correcting device in silo throw-in pipe - Google Patents

Abstract

PURPOSE:To effectively perform the correction of an eccentric flow by providing a hopper-like throttle section on a throw-in pipe provided above a silo, coaxially providing a fine throw-in pipe below it, and providing a communicating pipe which communicates between the throttle section and the lower position of the throw-in pipe. CONSTITUTION:A throw-in pipe 3 is provided above a silo 1 to allow the granules 8 carried in by a conveyor 2 to be thrown in. A hopper-like throttle section 4 is provided in the throw-in pipe 3, and a fine throw-in pipe 5 is connected coaxially with the throw-in pipe 3 below it. In addition, multiple communicating holes 6 are provided on the throttle section 4, and each hole 6 is communicated to the lower position of the throw-in pipe 3 through the communicating pipe 7. In this case, the granules 8 thrown into the throw-in pipe 3 are once stacked above the throttle section 4, a part of them is dropped through the fine throw-in pipe 5 and the other part is dropped through the communicating pipe 7... to lower position of the throw-in pipe 3, thereby forming coaxial flows, and they are accumulated in the silo through a proper dispersion throw-in unit A installed below while preventing unbalanced accumulation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an eccentric flow correction device for powder or granular material in a silo input pipe.

If powder and granules with various particle size distributions are simply introduced into the silo from the upper input pipe, a so-called classification phenomenon will occur, making it impossible to obtain uniform particle sizes, and the contained powder will flow toward the outside of the silo. The particle size increases and becomes smaller towards the center. In particular, when such a classification phenomenon occurs when the powder or granule is something that requires fumigation, such as imported plants such as alfalfa pellets, the passage resistance of the fumigation gas becomes uneven, which means that the fumigation gas Most of the particles pass through the periphery, where the particle size is large, and almost none pass through the central area, where the particle size is small, making complete fumigation of the entire inside of the rhinoceros mouth impossible, compared to fumigation using aluminum phosphide agents, for example. This poses a major disadvantage in that the cyclic fumigation method using methyl bromide gas, which has many advantages, cannot be applied. In addition, when the classification phenomenon occurs, the top of the contained powder and granules becomes mountain-shaped, which increases the dead space inside the silo mouth, and also reduces the silo's storage capacity because dense packing cannot be achieved. There are various disadvantages such as it is difficult to obtain a uniform particle size distribution in the process of gravity discharging the contained powder and granules from the bottom of the silo, and in some cases it may cause a bridging phenomenon within the silo. .

In order to prevent the classification phenomenon that causes many inconveniences as mentioned above, it has been proposed to install a dispersion feeding device in the lower part of the feeding tube (although sufficient effects have not yet been achieved). As a result of intensive research on the dispersion charging device, the present inventors have discovered that the classification prevention effect of the dispersion charging device is influenced by the flow state of the powder and granular material in the charging pipe. Obtained.

The present invention has been made based on this knowledge, namely, by correcting the eccentric flow of the powder and granular material introduced into the input tube from the conveyor installed above the silo with A in the input tube. The purpose is to effectively prevent the occurrence of the classification phenomenon by always reaching the dispersing device in an optimal state and using the dispersing device as effectively as possible at all times. The present invention makes it possible to correct such eccentric flow over a short distance and with small passage resistance. The present invention will now be described in detail based on Example G.

Reference numeral 1 is a silo, 2 is a conveyor provided above the silo 1, and 3 is an input pipe provided between the conveyor 2 and the upper part of the silo 1. The input tube 3 is provided with a hopper-like constriction section 4, and a membrane inlet tube 5 is connected to the lower part of the constriction section 4 coaxially with the input tube 3, and the constriction section 4 is provided with a plurality of communication holes 6, 6°. ... are provided, and the communication holes 6, 6. ...
... and the lower position of the input pipe 3, a communicating pipe 7, 7.・・・
Connect.

The communication holes 6, 6. and communication pipes 7,7. The number of communication holes 6, 6. . . , and the communication pipes 7, 7. The lower position of the input pipe 3 connecting the ... is not unevenly distributed but is symmetrical.

In this configuration, the powder 8 transferred by the conveyor 2 is charged from the conveyor 2 into the input pipe 3. The introduced powder and granular material 7 is deposited in one layer on the hopper-like constriction section 4, and a part of it falls along the central axis of the input tube 3 from the thin membrane inlet tube 5 connected to the lower part of the constriction section 4. In addition, the other part is the communicating hole 6, 6, provided in the aperture part 4.・・・
. . . to the communication pipe 7, 7. Input pipe 3 through...
, in the lower position.

Fall. According to the present invention, the powder and granular material 8 introduced into the input tube 3 from the conveyor 2 is deposited on the hover-like constriction part 4 without receiving it, and in this accumulated state, the powder and granular material 8 introduced into the input tube 3 are connected to the thin film input tube 5 and communicated with each other. Tube 7, 7. . . . Therefore, even if the powder and granules 8 are introduced eccentrically from the conveyor 2-, they will fall downward as an eccentric flow, as in the case of the feeding device shown in Fig. 4 to which the device of the present invention is not applied. 2nd thing to do
As shown in the figure, it can be made to fall downward as a flow concentric with the input pipe 3. In particular, the present invention prevents the falling of the powder and granular material 8 in a piled state from the communication pipes 7, 7. . . . is carried out through the thin membrane entry tube 5, so the powder and granules as a whole are 8. The passing dust area is wide, so the amount of dust to be introduced per unit time can be increased, and the diameter of the thin membrane entry tube 5 can be made small. It is possible to correct the eccentric flow, and also to correct the predetermined eccentric flow over a short distance, and it has the feature that it can be easily installed even when the distance between the conveyor 2 and the soil part of the silo 1 is short. .

Since the device of the present invention is capable of correcting the eccentric flow in this way, by installing an appropriate dispersion feeding device at the bottom of the feeding pipe 3, it is possible to handle powder having various particle size distributions such as alfalfa pellets. Even with grain size 8, it was placed in silo 1 in a very good condition with good classification and prevention of uneven accumulation.
It has the effect of being able to be filled inside.

Incidentally, the dispersion charging device A has, for example, the configuration of the invention disclosed in Japanese Patent Laid-Open No. 64991 of 1982, that is, the hopper part 9 is supported at a suitable distance from the lower end of the charging pipe 3, and A baffle plate 1 is disposed coaxially outwardly of the hopper portion 9.
In addition to the configuration in which a cylindrical guide part 12 in which 0 and space parts 11 are alternately formed is supported, a configuration in which a conical, spherical, etc. mountain-bending dispersion part 13 is supported below the hopper part 9 is applied. I can do things. In such a configuration, 1. As described above, the inlet pipe 3 is corrected to a concentric flow by the device of the present invention.
Powder 8 that fell downward from the end and reached the dispersion input section A
First, one part of the hopper 9 stops the collection and forms a pile according to the angle of repose while reducing the initial velocity. Part of the granular material 8 that continuously falls in this way falls along the slope of the pile, and the other -T'fl falls from the bottom of the potsupa part 9. Here, a part of the powder and granular material that has fallen along the slope of the pile pile collides with the baffle plate 10 of the cylindrical guide part 12 and bounces off, and falls from the space between it and the hopper part 9. A part of it falls outward through the space 11. Next, the powder and granular material 8 that has fallen from the lower part of the hopper part 9 is dispersed and falls to the yamabushi dispersion section 13 provided below.

In this way, the dispersion/feeding section A disperses the powder and granular materials 8 at multiple positions within the silo 1 and drops them, so that the degree of classification of the silo 1 as a whole is very small, uniform, and almost horizontal at the top. can be filled. The dispersing unit A may have any other configuration as long as it can appropriately disperse the powder or granular material 8 to a plurality of positions within the silo body 1.

As mentioned above, the dispersion/feeding section A has the function of appropriately dispersing and dropping the powder/granular material 8 fed from above to a plurality of positions in the silo 1 to uniformly fill it. The state in which the powder or granular material 8 is introduced by the part A depends on the state in which it is introduced from the charge pipe 3 into the dispersion charge part A. That is, when the apparatus of the present invention is not used as shown in FIG. As a result, it falls and reaches the dispersed feeding section A.

Then, the dispersion/feeding section A drops and mixes a large amount of powder or granules 8 in an eccentric direction, so that classification is not performed effectively and uneven accumulation occurs. However, as described above, the present invention can correct the eccentric flow of the powder and granular material 8 and supply it to the dispersion/feeding section A, so that the classification and uneven accumulation prevention effects of the dispersion/feeding section A can be maximized at all times. There is a characteristic that

As described above, the present invention is capable of very rationally correcting the eccentric flow of the powder and granular materials introduced from the conveyor and allowing them to fall concentrically with the input tube, so a distributed input section is provided at the bottom of the input tube. Due to the organic interaction between the device of the present invention and the dispersion/feeding section, the powder and granules can be dispersed and introduced into multiple positions in the mouth of the die in an appropriate state at all times, and the powder and granules with various particle size distributions can be fed. It is possible to uniformly prevent the classification phenomenon and the occurrence of uneven accumulation of gas evenly across the metal body inside the silo, while effectively preventing the occurrence of classification phenomena and uneven accumulation of gas. . Therefore, it is possible to uniformly supply fumigating gas to the powder and granules throughout the mouth of the rhinoceros. It has the great feature that it can be completely carried out using a circulation system using odoriferous gas, which has many advantages in comparison.In particular, the present invention 6. The powder and granules introduced from the conveyor into the input tube are The receiver is stopped and deposited at the "2-shaped constriction part" 2, and in the deposition state where force)'b is applied, the thin film is dropped from the thin membrane entry tube and the communication tube downward G to correct the eccentric flow, so that the overall As a result, the cross-sectional area for passing powder and granules is wide, and therefore the amount of time required to pass the powder and granules can be increased by ηi. Also effective against G
In addition to being able to correct the eccentric flow, it is also possible to correct the predetermined eccentric flow by distance (intelligence), and it has the feature that it can be easily installed even when the distance between the conveyor and the top of the silo is short. .

[Brief explanation of drawings]

The figures show an embodiment of the present invention, and FIG. 1 is a cross-sectional explanatory diagram showing the overall configuration of a silo to which the present invention is applied, FIG. 2 is a cross-sectional explanatory diagram showing the main part configuration, and FIG. 6(a) , (b)
, (C) is a cross-sectional view taken along lines X-7, y-yi, and Z-2 in FIG. 2, FIG. It is an operation explanatory diagram. Code Tosilo, 2... Conveyor, 3... Input pipe,
4. Squeezed portion, 5. Thin membrane entrance tube, 6, 6. ...Communication hole, 7.7. ...Communication pipe, 8...Powder, 9...
E, part of the brim, 10... baffle plate, 11... space part,
12...Cylindrical guide part, 13...Distribution part, A...Dispersion feeding device. Applicant: Taisei Corporation [2.j

Claims (1)

[Claims] A hopper-like constriction part is provided in the conveyor provided above the silo and the input pipe provided between the upper part of the silo, and a thin membrane inlet pipe is connected to the lower part of the constriction part coaxially with the input pipe, and An eccentric flow correction device for powder and granular material in a silo input pipe, characterized in that a plurality of communication holes are provided in the throttle part, and a communication pipe is connected between the communication holes and a lower position of the input pipe.