JPH066293U - Granule storage tank - Google Patents

Abstract

(57) [Summary] [Purpose] To smooth the flow of stored materials such as sawdust, sawdust-like wood chips or grains, prevent the crosslinking phenomenon, and eliminate the blockage in the storage tank. [Structure] A storage tank structure in a granular material container having an inlet at the top and an outlet at the bottom, wherein a plurality of guide ribs directed downward along the wall surface of the storage wall is provided inside the storage tank. . Further, the guide rib is formed with a taper so that the longitudinal cross section of the storage tank, which looks into the guide rib, is directed downward and expands.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a storage container of powder and granules having a structure in which a powder or granular substance such as sawdust, sawdust-like wood waste, or grains is used as a storage material, and is charged from the upper part of the container and discharged from the lower part.

[0002]

[Prior art]

 Conventionally, in self-weight discharge type storage tanks that store powder or granular materials, etc., due to the physical properties of the stored materials that are handled, the stored materials form ratholes or bridges in the tank and blockage phenomenon occurs. It has been known.

Therefore, for blocking and unblocking, a vibrator is attached to the wall of the storage tank to assist discharge, as seen especially in a funnel-shaped container that is reduced as the lower cross section of the hopper or the like is moved downward. Attempts have been made to increase the flow rate or to inject compressed air from the tank wall to destroy the arch formed by the bridge phenomenon and eliminate the flow congestion.

Further, regarding a storage tank that stores sawdust or the like, depending on the discharge device, discharge may be smoothed, and a known example provided by the present applicant (Japanese Patent No. 954545) is one of them. is there.

[0005]

[Problems to be solved by the device]

 However, stored materials such as sawdust, which has a relatively high water content and large internal friction in the powder particles, are particularly adherent and easily cause a bridging phenomenon. Therefore, even if the above-mentioned auxiliary device is provided, it is sufficient. In some cases, it may not be useful, and on the contrary, there may be a case where a filling operation due to vibration promotes blockage, or powder particles are scattered by compressed air, which has the opposite effect. In addition, for storage tanks mainly for temporary storage such as silos and storage tanks as the upper structure of the above-mentioned discharge device, even in a straight storage tank that does not cause a reduction in cross-section, due to the compaction of the stored materials, However, there was a problem that the pressure increased and the bridge support was formed.

[0006] Furthermore, this type of storage tank is often a relatively large-capacity storage, in which the lower part of the stored material is consolidated as it goes downward, and the stored material is locally discharged when discharged. In addition, there are problems that the blockage phenomenon is promoted due to uneven distribution, and it becomes impossible to discharge it, and the local stress on the wall surface of the storage tank increases, causing damage to the storage tank.

The present invention has been made in view of the above circumstances, and in order to solve the above-mentioned problems, the storage of a granular material having a structure in which a stored material flows smoothly and a bridge phenomenon is prevented. It is intended to provide a tank.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a container for granules having an inlet at an upper portion and an outlet at a lower portion, and provided with a plurality of guide ribs vertically downward along the wall surface of the reservoir wall inside the reservoir. At the same time, the guide ribs are formed so as to have a taper so as to extend downward by directing the longitudinal cross section of the storage tank, which looks into the guide ribs, downward.

[0009]

[Action]

 When the granular material is naturally discharged from the storage tank by its own weight, the flow velocity becomes highest in the central part of the storage tank and slowest in the inner wall surface of the storage tank. The blockage is due to the bridges and rat holes that are generated by the adherence of the powder and granules to the wall surface as a supporting part. The internal structure of the storage tank according to the present invention is formed such that the guide ribs provided vertically downward along the wall surface have the taper so that the vertical cross section of the storage tank, which looks into this, is enlarged downward. Therefore, the shape effect of this surface and cross-sectional structure facilitates the flow of the stored material. Further, this prevents the adhesion, so that the support portion for the bridge and the rat hole is not formed.

[0010]

Embodiment 1 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a horizontal cross-sectional view of a storage tank embodied in a cylindrical shape, and FIG. 2 is a vertical cross-sectional view of the storage tank (described above as a vertical cross-section looking into the guide ribs). In the figure, 1 is an inner wall of a storage tank, 2 is an inlet, 3 is an outlet 4, a granular material, and 5 is a guide rib.

Here, the plate thickness of the member is omitted in the diagram. In the following, only the main part of the internal structure of the storage tank will be described, and description of other parts, such as supply / discharge and various adjustments / controls, will be omitted.

The inner wall (1) of the cylindrical storage tank embodying the present invention is provided with guide ribs (5) directed vertically downward along the wall surface so as to face the inner circumference of the storage tank wall (1). The guide rib (5) has a taper so that the longitudinal section of the storage tank is directed downward and expands. Further, as shown in FIG. 3, an example of this member is empirically preferred to be a protrusion having two sides of a triangle, but the present invention is not limited to this.

As can be seen from the cross-sectional shape (FIGS. 1 and 2), the storage tank configured as described above relieves the local stress of the storage tank wall caused by the stored material as an external force and also serves as a structural reinforcement. It contributes.

[0014]

Second Embodiment As another embodiment, FIGS. 4 and 5 show the internal structure of a storage tank having a rectangular cross section. Here, FIG. 4 is a transverse sectional view thereof, and FIG. 5 is a vertical sectional view thereof. In the drawings, the discharge screw or the like may be considered as a constituent element according to a known technique, and the description thereof is omitted because it is not particularly mentioned in the present invention.

It has been proved that the guide rib (5) in this example has a desired effect if a plurality of guide ribs (5) are provided on at least two opposite surfaces of the four surfaces of the storage tank inner wall (1).

Although one embodiment of the present invention has been described above, the shape of the storage tank and the shape and number of the guide ribs are not limited to these, and various modifications are possible within the scope of protection of the present invention. Can be applied.

[0017]

[Effect of device]

 The present invention is configured as described above. According to the present invention, the simple guide rib structure of the self-weight discharge type storage tank exerts an excellent effect on the smoothness of flow of powder and granules and the prevention of the bridge phenomenon. The blockage can be eliminated.

Further, the storage tank according to the present invention can be combined and applied as an upper storage structure such as a large hopper having a funnel-shaped lower structure, and the cross-sectional shape of the storage tank inner wall can be variously modified by the guide ribs. Therefore, it is possible to form a wall surface corresponding to the stored material, and it is expected that the blockage can be widely removed with respect to the object to be processed, which easily causes the bridge phenomenon.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cylindrical storage tank according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is an external view of a guide rib that is an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a prismatic storage tank according to another embodiment of the present invention.

FIG. 5 is a vertical sectional view of the same.

[Explanation of symbols]

 1 Inner wall of storage tank 2 Input port 3 Discharge port 4 Granules 5 Guide rib

Claims (1)

[Scope of utility model registration request] 1. A container for powdery or granular material having a charging port in the upper part and a discharging port in the lower part, wherein a plurality of guide ribs directed vertically downward along the wall surface of the storage tank wall are provided inside the storage tank, and the guide ribs are A storage tank for powder particles, characterized in that it is formed with a taper so that the longitudinal section of the storage tank that allows for this can be directed downward and expand.