JPH01111692A - Storage tank for particulate material - Google Patents

Abstract

PURPOSE:To prevent a peripheral apparatus from receiving adverse effect by making it possible to perform discharge by the destruction of a closed state, by constituting a moving wall on the inner surface, with which a particulate material is contacted, of the wall of a storage tank so as to slide therealong. CONSTITUTION:A moving wall 6 forming a disc shape is fixed and supported by the shaft 8 supported in a freely rotatable manner by the bearing 7 fixed to the wall of a storage tank 1. A sprocket 9 is fixed to the shaft 8 and transmits the rotatory power transmitted from a power apparatus through a chain to the moving wall 6. A lining plate 10 is lined to the inner surface of the wall of the storage tank 1 as an abrasion measure and consideration is given so that the surface difference in level between the moving wall 6 and the lining plate 10 is made as small as possible. By rotating the moving wall 6 at the optimum speed corresponding to the flow speed of a particulate material in connection with the discharge motion of the particulate material, relative motion is present between the oblique surface of the wall of the storage tank constituted of the moving wall 6 and the particulate material and, therefore, the stagnation of the flow of the particulate material is not generated and the support part of a rathole or bridge is not formed and no closure is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a storage tank for powder or granular material, such as a hopper, which has a structure in which powder or granular material is charged from the upper part and discharged from the lower part.

[Conventional technology]

In a storage tank that has the function of introducing powder and granular materials from the top and discharging them from the bottom, due to the physical properties of the powder and granular materials being handled, the powder and granules may form rat holes or bridges in the tank, preventing them from being discharged from the discharge port. There is a problem that causes a phenomenon. The cause of blockage is due to sliding friction between the storage tank wall and powder particles and internal friction within the powder particles, and it is well known that these are closely related to the particle size, moisture content, and adhesion of the powder particles. A typical example of the 0th order blockage state will be explained with reference to FIGS. 5 and 6. 5 and 6 are explanatory diagrams showing the storage tank structure and the closed state of the powder and granular material. In the figures, 1 is the storage tank wall, 2 is the inlet for the powder, 3 is the outlet for the powder, and 4 is a feeder that transports the powder discharged from the storage tank to downstream equipment. 5 shows a granular material with a rat hole formed therein, and 5' shows a granular material with a bridge formed therein. FIG.

As shown in Fig. 6, the upper inlet 2 has a wide opening, and the lower outlet 3 has a narrow funnel-shaped opening, which is an essential structure. It is common to form

As shown in FIG. 5, only the central part of the rat hole directly above the discharge port 3 flows, and the powder and granules on the outside thereof remain stationary. Furthermore, the introduced powder and granules are discharged through the rat hole, but depending on the physical properties of the powder and granules, adhesion to each other progresses.
This phenomenon also causes the rat hole in the center to become obstructed. Furthermore, as shown in FIG. 6, bridging is a phenomenon in which the powder or granules block the outlet in a narrow area near the outlet 3, as if crossing an arched bridge. As the powder and granule handling process becomes larger and more automated, the number of storage tanks increases and the size of the granular material storage tanks increases. It has become necessary to play an important role in the handling process, such as adjusting the storage tank, and if the -degree storage tank becomes clogged, it takes a great deal of effort and time to restore it.
Solving the blockage problem is an essential condition for ensuring process productivity, as dangerous work is forced. In order to meet this condition, conventional techniques include attaching a vibration motor to the storage tank wall to give a combing effect to the powder and granules, and jetting high-pressure air from the storage tank wall to give a fluidizing effect to the powder and granules. Various methods have been tried to solve the tree problem. Note that related devices of this type include, for example, Japanese Utility Model Application No. 49-67370.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology is a method whose main purpose is to prevent blockage, and has the disadvantage that it lacks the ability to destroy and drain the blockage from the worst-case condition, which is the blockage, and that additional equipment causes new problems. For example, with the method of installing a vibration motor, the vibrations generated by the vibration motor propagate to peripheral equipment, which requires countermeasures, and depending on the type of occlusion, the filling effect caused by the vibrations may aggravate the occlusion. However, with the method of blowing out high-pressure air, the effectiveness is limited to closed configurations where there is space within the action range of the jetting pressure, and conversely, in closed configurations where there is a lot of space, the jetting pressure can cause powder and granules to be scattered outside the upper part of the storage tank. There was a problem.

The purpose of the present invention is not only to prevent blockages, but also to be effective in destroying and discharging the blockages that are essential in storage tanks that have the role of storage. To provide a storage tank for powder and granular material that eliminates the problem of clogging without adversely affecting peripheral devices.

[Means for solving problems]

The above object is achieved by configuring a moving wall that slides along the wall surface on the inner surface of the storage tank wall in contact with the granular material.

[For production]

When powder and granules are allowed to flow out naturally from a storage tank by gravity, the flow rate of the powder and granules is fastest in the center of the storage tank and becomes slower as it approaches the slope. Therefore, the powder on the slope is the last to be discharged and the storage tank is emptied. Therefore, blockage occurs because the flow of powder and granules on the slope of the storage tank becomes congested, causing adhesion of the powder and granules to the slope, forming rat holes and bridge supports. The part where the support part is formed differs depending on the shape and dimensions of the storage tank and the physical properties of the powder.
- In boat fishing, the adhesion is compacted by the impact of the powder and granular material being introduced and the pressure due to the weight, and the lower part of the storage tank has a narrow opening, where conditions are established to form a strong bridge in a short span.

The storage tank according to the present invention provides a movable wall at an appropriate part of the slope of the storage tank wall, that is, at the supporting part of the rat hole or bridge mentioned above, and by sliding the movable wall along the slope at a predetermined speed, the slope and powder are removed. Since there is relative motion between particles, there is no flow congestion, and no adhesion occurs, so no rat holes or bridge supports are formed, and even if they become blocked during storage. By sliding the movable wall in conjunction with the start of discharge, the support portion of the blockage is destroyed by the same action as described above, and the state shifts to the discharge state.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an explanatory diagram of one embodiment of the present invention, and FIG. 2 is a structural diagram of the movable wall portion 6, and the reference numbers 1 to 4 in the diagram are the same as those shown in FIGS. 5 and 6. In Figure 0, reference numeral 6 denotes a moving wall in the form of a disk, and a bearing 7 fixed to the storage tank wall 1.
It is fixedly supported by a shaft 8 which is rotatably supported by.

Reference numeral 9 is fixed to the shaft 8 by a sprocket, and transmits rotational force transmitted from a separately installed prime mover (not shown) to the movable wall 6 via a chain (not shown).

Reference numeral 10 denotes a lining plate, which is generally lined with a lining to prevent wear on the inner surface of the storage tank wall 1. Structural considerations are taken to minimize the surface level difference between the movable wall 6 and the lining plate 1O. It is. In addition, the attachment part of the movable wall 6 shown in Fig. 1 is the lower part of the powder and granular material 5, 5' shown in Figs. Since the example is configured as described above, by rotating the movable wall 6 at an optimum speed commensurate with the flow speed of the powder and granular material in conjunction with the discharging operation of the powder and granular material, the storage tank wall composed of the movable wall 6 Since there is relative motion between the slope and the granular material,
Since there is no congestion in the flow of the powder and therefore no adhesion against the weight of the upper part of the powder occurs, no rat holes or bridge supports are formed and no clogging occurs. Furthermore, even if a blockage occurs during temporary storage when the discharge operation is stopped with powder or granules remaining in the storage tank due to production reasons, the movable wall 6 can be rotated in conjunction with the discharge operation restarted. As a result, the support part of the blockage is destroyed by the rotation of the movable wall 6, so the blockage collapses and shifts to the discharge state. Note that by providing a plurality of protrusions or incisors on the surface of the movable wall 6, it can be expected that the effect of breaking the blockage will be further improved.

FIG. 3 shows another embodiment according to the present invention.
In the embodiment shown, the movable wall 6 is given a rotational motion, but in this example, the movable wall is given a linear motion in the direction of arrow A.
The supporting arm 12 and the guide roller arm 13 form a square shape.
In this embodiment, the powder and granular material The effect of sending the powder toward the discharge port is large, and the synergistic effect of the flow of the powder on the slope promotes the flow of the entire powder, so depending on the physical properties of the powder, it may be even more effective than the embodiment shown in Figure 1. is obtained.

FIG. 4 shows still another embodiment according to the present invention,
In the embodiment shown in FIG. 3, the movable wall 11 is given reciprocating motion due to configuration limitations, whereas the movable wall is an endless bell) 17.
In this example, the belt 17 is connected endlessly through a drive pulley 18, a driven pulley 19, and a pend pulley 20, and is given unidirectional movement in the direction of arrow B.
In this embodiment, the belt 1 runs in the direction of arrow B by a drive pulley 18 driven by a prime mover (not shown).
7 penetrates through the storage tank wall 1, consideration must be given to the sealing structure of this part, but the effect of sending the powder to the discharge port is even greater than that of the embodiment shown in Fig. 3, and a great effect can be obtained in terms of preventing clogging. .

In the above-mentioned embodiment, it was explained that the attachment part of the movable wall is roughly aligned with the support part of the rat hole or bridge, but this does not limit the number of parts constituted by the movable wall.
An even greater effect can be obtained by attaching the movable wall to a plurality of locations where it is thought that a ripple effect can be obtained by applying a fluid action, or to a plurality of storage tank walls constituting the storage tank.

Furthermore, although one or more embodiments have been described with respect to a storage tank, even in the chute of a belt conveyor as shown in Japanese Patent Laid-Open No. 58-193828, particles may adhere to the wall surface of the chute where the particles collide with the particles discharged from the belt. This is a problem to which the present invention can be applied.

〔Effect of the invention〕

According to the present invention, there is an excellent effect that clogging of the storage tank, which is an important factor for increasing the size, automation, and labor saving of powder and granular material processes, can be prevented without being limited to specific physical properties or forms of clogging. , greatly contributes to ensuring process productivity and safety.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a storage tank for powder and granular material showing one embodiment of the present invention, Fig. 2 is an enlarged detailed view of the movable wall portion, and Figs. 3 and 4 are other embodiments of Kibatsu Moe. Enlarged detailed view of the moving wall showing the 5th
FIG. 6 is a vertical cross-sectional view of a conventional powder storage tank. 1----m-storage tank wall, 2-----1 powder/granule material inlet. 3-----One powder discharge port, 4-----Feeder, 5-----One powder and granule, 6, 11--Moving wall, 7-- -Bearing, 8--1--shaft, 9--
----Sprocket, 10--1---Lining plate, 12--1--Support arm, 13--Guide roller arm, 14--1---Guide roller, 15-
----1 support bracket, 1fl-1---actuator, 17------belt, 1B------
One driving pulley, 19---One driven pulley, 20
------Bend Pulley No. 1 No. 2 No. 3 Prisoner Age 4 No. 5 No. 022 Mony J

Claims (1)

[Scope of Claims] 1. In a powder storage tank having a powder or granular material input port at the upper part and a powder or granular material discharge port at the lower part, there is a movement that slides along the wall surface of the storage tank wall inside the storage tank. A storage tank for powder and granular material characterized by having a wall. 2. The storage tank for powder and granular material according to claim 1, wherein the movable wall is a rotating disk. 3. A storage tank for powder and granular material according to claim 1, in which the movable wall is constituted by a reciprocating plate. 4. The storage tank for powder and granular material according to claim 1, wherein the moving wall is constituted by an endless belt supported by a driving pulley and a driven pulley.