JPS59223631A - Granule throw-in device in silo - Google Patents

Abstract

PURPOSE:To invariably perform the dispersed throw-in of granules having various grain size distributions properly by providing an eccentric flow correcting section of granules on a throw-in pipe provided above a silo and also providing a dispersion throw-in section below it. CONSTITUTION:A throw-in pipe 3 is provided above a silo 1 to allow the granules 4 carried in by a conveyor 2 to be thrown in, and an eccentric flow correcting section A and a dispersion throw-in section B are provided below this throw- in pipe 3. The eccentric flow correcting section A is constituted by providing a hopper-like throttle section 5 on the throw-in pipe 3, connecting a fine throw-in pipe 6 below it, and providing a communicating pipe 8 which communicates multiple communicating holes 7 provided on the throttle section 5 to the lower section of the throw-in pipe 3. On the other hand, the dispersion throw-in section B is constituted with a hopper section 9 supported at the lower position suitably separated from the lower end of the throw-in pipe 3, a cylindrical guide section 12 coaxially provided outside it, and a hill-like dispersion section 13 supported by the lower section of the hopper section 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for charging powder and granular material into a silo (including a hombar) K.

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. becomes larger, and the particle size becomes smaller toward the center. In particular, when such a classification phenomenon occurs when the powder is made of imported plants such as alfalfa pellets that require fumigation, 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. A major disadvantage arises in that the cyclic fumigation method using methyl bromide gas, which has many advantages in comparison, cannot be applied. In addition, when a classification phenomenon occurs, the dead space inside the silo mouth increases because the top of the contained powder and granules becomes mountain-shaped, and since a dense packing state cannot be achieved, the silo's capacity is reduced and There are various disadvantages, such as the fact that it is difficult to obtain a uniform particle size distribution during the process of gravity discharging the contained powder and granules from the bottom of the silo, and in some cases, it may cause the pudding phenomenon to occur inside the silo. arise.

In order to prevent the classification phenomenon that causes the many inconveniences mentioned above, it has been proposed to install a distributed charging section at the bottom of the charging pipe, but the current situation is that sufficient effects have not yet been achieved. It is. As a result of intensive research on the dispersion/feeding section, the present inventors have found that the anti-classification effect of the dispersion/feeding section depends on the state of flow of the powder or granules in the feeding tube. The present invention was made based on this knowledge, namely:
Powder and granules are fed into the silo from a conveyor installed above the silo body through the feeding pipe and the dispersion feeding section, and are always dispersed and fed in an optimal state by correcting the eccentric flow in the feeding pipe. The purpose is to effectively prevent the occurrence of the classification phenomenon by using the dispersing portion to the maximum extent possible. The present invention will be described in detail below based on examples.

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 pipe 3 is provided with an eccentric flow correction section A for the powder or granular material 4, and a dispersion input section B is provided at the lower part of the input pipe 3. Here, first, in one embodiment of the eccentric flow correction section, a hopper-like constriction part 5 is provided in the input tube '3, and a thin membrane inlet tube 6 is connected to the lower part of the constriction part 5 coaxially with the input tube 3. At the same time, a plurality of communication holes 7 provided in the aperture portion 5,
A communication tube 8 is connected between the positions of the input tube 3 corresponding to the outside of the thin membrane input tube 6, and in addition to this, the eccentric flow correction section A is connected to the input tube 3 which is input from the conveyor 2.
Any configuration capable of correcting the powder or granular material 4 flowing in a pivoted state so that it flows concentrically is suitable, such as other configurations described later. Next, an embodiment of the distributed feeding section B is disclosed in Japanese Patent Laid-Open No. 56
The configuration of the invention disclosed in Japanese Patent Application No. 64991, namely, supports the hopper part 9 below at an appropriate distance from one end of the input pipe 3, and supports the hopper part 9 coaxially outwardly of the hopper part 9. This structure supports a cylindrical guide in which baffle plates 10 and spaces 11 are alternately formed. In addition to the above-mentioned configuration, the dispersion/feeding unit B may also have any suitable configuration such as other configurations described later.

In this configuration, the powder 4 transferred by the conveyor 2 is charged from the conveyor 2 into the input pipe 3. The charged powder and granular material 4 is deposited on the hopper-like constriction section 5, and some of it falls along the central axis of the input tube 3 from the thin membrane inlet tube 6 connected to the VC at the bottom of the constriction section 5, while others A part of it passes through the communication pipe 8 from the communication hole γ provided in the constricted portion 5.

It is introduced into the input tube 3 corresponding to the outside of the thin membrane entrance tube 6.

In this way, even if the powder or granular material 4 is introduced from the conveyor 2 into the input tube 3 in an eccentric state, it falls in a concentric state below the eccentric flow correction section A, and falls into a concentric state under the eccentric flow correction section A.
reach. Here, in addition to the above-mentioned embodiment, the eccentric flow correction section A can also be constructed of a hopper-like constriction section 5' and a thin membrane entry tube 6' as shown in FIG. 4(a) K.
It is also possible to configure the scarecrows in a multi-stage design. In the configuration of the above-mentioned embodiment, since the granular material 4 is added to the membrane entry tube 6 and also dropped through the communication tube 8, compared to the configuration of the other embodiment, the unit time is There is an advantage that the amount of powder and granular material 40 passing per unit can be increased, and that even if the distance between the conveyor 2 and the silo 1 is short, a predetermined eccentric flow correction can be performed.

However, as mentioned above, the powder and granules 4 that have been corrected to be concentric and fall downward from the end of the input pipe 3 and reach the dispersed input section B are first stopped from being received by the hopper part 9. A pile is formed according to the angle of repose while reducing the initial velocity. Part of the granular material 4 falling continuously in this way falls along the slope of the pile, and the other part falls from the lower part of the hopper part 9. Here, a part of the powder falls along the slope of the AiJ heap and falls onto the baffle plate 10 of the cylindrical guide section 12.
The paper collides with the paper and bounces off, falling off from the space between it and the hopper part 9, and the other part passes through the entire space 11 and falls outward 1.
-ru. Next, the powder and granular material 4 (
It is dispersed and falls to the yamabushi dispersion section 13 provided below l'j. In this way, when the feeding of the powder and granular material 4 from the conoveyor 2 is completed, and the powder and granular material 4 is no longer fed onto the pile pile that was formed on the hopper part 9, the pile pile is formed. Finally, only the granular material 4 falling passes through the lower part of the pump part 9.

However, since the mountain-like dispersion portion 13 is provided below, 1,
The powder and granular material 4 that falls last does not create a pile pile at the center.

In this way, the dispersion/feeding section B disperses the powder and granular materials 4 at multiple positions within the silo body 1 and drops them, so that the degree of classification of the silo body 1 as a whole is very small and uniform, and the top part is almost Powder 4 can be filled in a horizontal state. Such a dispersion/feeding section B has a configuration in which the powder and granular material 4 is appropriately dispersed in a plurality of positions within the silo main body 1, so as to obtain it, for example, as shown in FIG. 4(b) in another example. , it is also possible to configure only the head part 9' and the mountain-shaped dispersion part 13',
Such a configuration can be applied to a relatively small diameter silo 1.

As mentioned above, the dispersion input section Bid is loaded from above.

The silo body 1 has the function of appropriately dispersing and dropping the powder 4 into multiple positions within the silo body 1 to uniformly fill the powder and granular material 4. It depends on the state of charging from the charging pipe 3 to the dispersion charging section B. That is, as shown in FIG.
Due to the influence of the traveling direction, etc., the granular material 4 eccentrically introduced from the conveyor 2 into the input tube 3 falls as an eccentric flow 2 and reaches the dispersed input section B'. Then, the dispersion/feeding section B drops a large amount of powder 4 in an eccentric direction, so that classification cannot be performed effectively and uneven accumulation occurs.

However, as described above, in the present invention, since the input pipe 3 is provided with the eccentric flow correction section, the dispersed input section 13K always has the function of injecting the powder and granules 4 concentrically with the input tube 3. The dispersion/feeding part BK is characterized by the ability to maximize its classification and prevention effect against foaming.

As described above, the present invention includes an eccentric flow correction section provided in the injection officer,
Through organic interaction with the dispersion input section provided at the bottom of the input tube, 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 can be adjusted to various particle size distributions. However, the fumigation gas can be filled into the tube while effectively preventing the occurrence of classification and uneven accumulation, and the passage resistance of the fumigation gas can be made uniform throughout the tube.

Therefore, the fumigation gas can be uniformly supplied to the entire powder inside the mouth of the rhinoceros, making it easier to fumigate imported plants such as alfalfa pellets, for example, compared to aluminum phosphide fumigation. A major feature of this method is that it can be carried out completely in a circulating system using methyl bromide gas, which has many advantages. In addition, in the present invention, the powder can be filled so that the top of the powder is almost flat, so the dead space inside the mouth is reduced, and the fine particles fill the gaps between the coarse particles. It is possible to increase the capacity of the silo because it can be packed densely so that it is mixed uniformly with the silo, and it is easy to obtain a uniform particle size distribution in the process of gravity discharging the powder and granules from the bottom of the silo. It has many features, such as the ability to effectively prevent the occurrence of bringing in the π inside the silo.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a cross-sectional explanatory view of the entire structure of a silo to which the present invention is applied, Fig. 2 is a cross-sectional explanatory view showing the main part structure, and Fig. 6 (a) ), (b), (c
) is a cross-sectional view of the X-X line, y-y, l, and Z-2 line in FIG. FIG. 5(a), (one) is an explanatory diagram of the operation of the dispersion feeding section, and FIG. 6 is an explanatory diagram of the operation of the configuration without the eccentric flow correction section. Symbol A... Eccentric flow correction section, B... Distributed injection section, 1.
;・Silo, 2... Conveyor, 3... Input W, 4
...Powder, 5... Squeezed part, 6... Thin membrane entrance tube, γ
...Communication hole, 8...Communication pipe, 9...Part of the hood,
10...Baffle plate, 11.Space part, 12...Cylindrical guide part, 13...Mountain-like dispersive sound 1 (.Applicant Taisei Corporation Toyo Wharf Co., Ltd.r'="1 Agent 3 Back Akira; Tsukasa: ],,・ (enter, 4.1-,:) Figure 1 Figure 2 Figure 5 (a) Figure 5 (b) Figure 6 ====7=%/Pa

Claims (3)

[Claims] (1) A conveyor provided above the silo and an input pipe provided between the upper part of the silo are provided with an eccentric flow correction section for powder and granular material, and a dispersion input section is provided at the bottom of the input tube. A device for feeding powder and granules into a silo. (2) (The cardiac flow correction unit includes a hopper-like constriction part provided in the input tube, a thin membrane inlet tube coaxially connected to the input tube at the lower part of the constriction part, and a plurality of communication holes provided in the constriction part. 2. The device for charging powder and granular material in a silo according to claim 1, characterized in that a communication pipe is connected between positions of the charging pipe corresponding to the outside of the thin membrane entry pipe. (3) The dispersion feeding section supports a part of the hopper from the lower end of the feeding tube, heated appropriately, and is a cylindrical guide coaxially outward of the part of the hopper, in which baffles and spaces are alternately formed. 2. The device for charging powder and granular material in a silo according to claim 1, further comprising a mountain-like dispersion section supported below a portion of the bulge.