JP2001278384A - Granule storage tank device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granule storage tank device preventing the generation of an internal flow phenomenon, a bridge phenomenon, a residual and fixing phenomenon and the like, guaranteeing the first-in and first-out by smoothly flowing the stored granule, provided with a simple structure and to be fitted later on devices of above kinds heretofore available. SOLUTION: The granule storage tank device 10 is provided with a cone section 12 of a reverse conical shape continuously connected with the lower end of a cylindrical body 11 and a tank main body 14 with a discharge outlet 13 on the top section of the lower end of the cone section 12, and corner sections 15 with their tops open are provided at the given intervals by supporting legs 16 extended from the cone section 12 inside the tank main body 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular storage tank device, for example, for storing and storing powders such as cement and fly ash, or granular materials such as feed and grains, and a discharge opening at a lower end when necessary. The present invention relates to a device for storing a granular material discharged from a container.

[0002]

2. Description of the Related Art Conventionally, powders such as cement and fly ash, or granular materials such as feed and grains are stored and stored.
The powder storage tank device 1 to be taken out from the lower outlet when necessary is basically formed with an outlet 5 which is an outlet at the center of the lower end, and is tapered toward the outlet 5. The funnel-shaped or conical bottom plate 3 was integrally assembled to the lower end of the vertically long cylindrical body 2.

Since the bottom plate 3 having the discharge port 5 formed in the center is formed in a conical shape tapering toward the discharge port 5, the bottom plate 3 is usually called a "cone portion". ing. In such a granular material storage tank device 1, when the granular material 4 stored inside is taken out when necessary,
It was necessary to smoothly flow out of the outlet 5 of the cone part 3 by gravity flow due to its own weight. Therefore, in the conventional granular material storage tank device 1, the inclination angle of the cone portion 3 with respect to the horizontal line is often designed to be about 60 degrees.

[0004]

Generally, in such a granular material storage tank device 1, when the granular material 4 contained therein flows out from the discharge port 5 of the cone portion 3,
It is known that the discharge of the granular material 4 located at the central portion often progresses rapidly inside the tank device, and the whole decreases in a mortar shape.

However, in practice, even when the granular material 4 is accommodated in such a granular material storage tank device 1, it is shown in FIG. 6 by the frictional force or the powder pressure of the accommodated granular material 4. In this manner, only the particles existing on the central axis passing through the discharge port 5 are substantially linearly discharged, and the other parts of the particles 4 are not discharged. In some cases, the natural discharge of all the granules may not occur.

Further, as shown in FIG. 7, only the powder 4 in the vicinity of the discharge port 5 of the cone portion 3 is spontaneously discharged, the portion becomes a cavity 6, and the powder in other portions is not discharged. ,
A so-called bridge phenomenon may occur. Further, as shown in FIG. 8, the granular material 4 adheres to the inner wall surface of the tank device, in particular, near the connecting portion between the cylindrical body 2 and the cone portion 3, and the adhered granular material is discharged. Remains without
This may gradually grow and stick.

[0007] Such a phenomenon is sometimes called a residual / fixed phenomenon. When this phenomenon occurs, some or all of the residual mass that adheres to the inner wall and grows and solidifies suddenly peels off while using the granular material storage tank device, causing damage to other equipment. There was a fear of giving. In addition, when the above-mentioned phenomenon occurs, there is a disadvantage that the powder or granules which have been charged later into the powder storage tank device, in other words, the newly charged powder or granules are discharged first, and the first-in first-out cannot be reliably performed. There was also.

For this reason, it has been a long-standing problem in this type of granular material storage tank apparatus to allow the granular material contained therein to smoothly flow out of the discharge port of the cone portion. . Various proposals have already been made to solve this problem, but all of these proposals have problems such as an increase in the size of the device, a complicated structure, difficulty in retrofitting, and a high manufacturing cost. There was no effective solution.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and it is intended to prevent the occurrence of an internal flow phenomenon, a bridging phenomenon, a residual / sticking phenomenon, etc. The first-in first-out is ensured by letting the body flow smoothly, and the structure is simple,
Moreover, it is an object of the present invention to provide a powdery and granular material storage tank device that can be retrofitted to a conventional device of this kind.

[0010]

According to the present invention, there is provided a powdery and granular material comprising a tank body having an inverted conical cone connected to a lower portion of a cylindrical body, and a discharge port provided at a lower end apex of the cone. In the storage tank device, in cooperation with the cone part,
An annular recess having a substantially W-shaped cross section is formed inside the tank body, a lower end of the annular recess is formed with a passage opening communicating with the lower end along the cone portion, and an inverted V-shape located at the center of the annular recess. An opening is formed at the top of the chevron, and this opening communicates with the lower end of the cone.

More specifically, an annular concave portion having a substantially W-shaped cross section formed in cooperation with the cone portion is provided at a predetermined interval from the surface of the cone portion by a support leg. And installed inside the tank body.

Further, in the granular material storage tank device according to the present invention, a contact plate is disposed at a connecting portion between the cylindrical body and the cone portion in the tank body, and the bending plate extends from the inner peripheral surface of the cylindrical body to the cone portion. It is also preferable to make the angle smooth. Further, it is preferable that the conical portion is fixedly supported on the cone portion by a plurality of support legs provided at or near the bottom edge thereof and spaced apart in the circumferential direction.

Still further, in the granular material storage tank device according to the present invention, an angle of the inclined surface of the conical portion provided in the tank body with respect to a horizontal line is about 55 degrees. In the granular material storage tank device of the present invention, it is also preferable to lay a canvas cloth on the surface of the cone portion. The shortest distance between the bottom edge of the conical part and the cone part installed in the tank body is preferably about 300 mm, and the diameter of the opening formed at the top of the conical part is about 120 mm. Good.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a storage device for a granular material according to the present invention. FIG. 1 is a longitudinal sectional view schematically showing a granular material storage tank device 10 according to an embodiment of the present invention, and FIG. 2 is a top view of the granular material storage tank device 10 as viewed from above.

[0015] The powder storage tank device 10 of this embodiment
Basically, a cone portion 12 is connected to a lower portion of a cylindrical body 11 and a tank body 14 having a discharge port 13 provided at a central portion of the cone portion 12. The diameter D of the cylindrical body 11 constituting the tank body 14 is 2700 mm,
The diameter S of the outlet 13 is designed to be 330 mm, and the angle θ of the cone 12 with respect to the horizontal line is designed to be 60 degrees.

Inside the tank body 14, an annular concave portion 19 having a W-shaped cross section is formed in cooperation with the cone portion 12, and a lower end along the cone portion 12 is formed at a lower end of the annular concave portion 19. A communicating opening is formed. An opening is formed at the top of the inverted V-shaped chevron located at the center of the annular recess 19, and this opening communicates with the lower side of the cone 12.

This configuration will be described more specifically. W-shaped annular recess 1 formed in cooperation with cone 12
9 has a conical portion 15 of the top opening inside the tank body 14.
Are provided at predetermined intervals from the surface of the cone portion 12 by a plurality of support legs 16. Here, the conical portion 15 refers to a conical component that is installed with its pointed end facing forward, that is, upward.

A plurality of strip-shaped supporting legs 16 spaced apart in the circumferential direction are provided on the peripheral surface of the conical portion 15 near the bottom edge 15c, that is, on the outer surface of the inclined wall 15a, by welding or adhesive. It is attached by fixing means. Each support leg 16 protrudes from the bottom edge 15c by a predetermined length along the downward slope of the inclined wall 15a. The lower end of each support leg 16 is fixed on the inner surface of the cone 12 by a suitable fixing means such as welding or an adhesive.

The conical portion 14 may be solid inside or hollow like an umbrella. However, in order to reduce the weight of the whole granular material storage tank device, it is preferable to use a fan-shaped plate material which is bent in a conical shape and formed in an umbrella shape. In either case, the top of the tip is open, and the opening 15 b is open to the bottom of the conical portion 15. The diameter L1 of the opening 15b is 120 mm.
It is good to be. The inclined wall 15 in the conical portion 15
The inclination angle α of a with respect to the horizontal line is 55 degrees.

The conical portion 15 is formed by projecting each support leg 16 from the bottom edge 15c to form the tank body 14
Is placed at a predetermined height above the inner surface of the cone portion 12, and the bottom edge 15 c of the cone portion 15 at that time and the cone portion 1
The distance P to the inner surface (distance along the inclined downward direction of the inclined wall 15a) P is preferably 300 mm. Furthermore, cylindrical body 1
In the case of the tank body 14 having the diameter D of 1 and the diameter S of the discharge port 13 designed as described above, the outer diameter L2 of the bottom of the conical portion 15 is preferably 1300 mm.

In the granular material storage tank device 10 according to this embodiment, a contact plate 17 is provided on the inner surface of the tank body 14 at the connection between the cylindrical body 11 and the cone section 12.
Are arranged along the peripheral surface of. By this. The bending angle from the inner peripheral surface of the cylindrical body 11 to the cone portion 12 is made smooth, so that the adhesion of the granular material to the connecting portion is prevented.

The operation of the granular material storage tank device 10 according to the present embodiment, which is configured as described above, that is, the discharging operation of the granular material 4 accommodated therein will be described. As shown in FIG. 3, when the granular material 4 is accommodated in the granular material storage tank device 10 according to this embodiment, and the discharge port 13 of the cone portion 12 is opened, the granular material 4 substantially becomes 2. And flows out to the outlet 13.

One flow flows into a W-shaped annular groove 19 defined by the cone portion 12 and the inclined wall 15c of the cone portion 15, as indicated by an arrow 18, and flows from the inner surface of the cone portion 12 to the inner surface thereof. This is a path toward the outlet 13 through a substantially annular gap with the bottom edge 15 c of the conical portion 15 separated by the plurality of support legs 16.

On the other hand, as shown by the arrow 20, another flow is caused by the opening 15 formed at the top of the conical portion 15.
This is a path from b to the discharge port 13 of the tank body 14 which is the lower end of the cone portion 12 through the inside of the cone portion 15. This path causes the powder or granular material located at the center of the tank body 14 to flow toward the discharge port 13.

[0027] Broadly, according to these two flows,
The whole of the granular material 4 accommodated in the granular material storage tank device 10 is smoothly discharged from the lower side on average. When an experiment was conducted by actually manufacturing the granular material storage tank device 10 having this structure, an internal flow phenomenon, a bridge phenomenon,
Alternatively, there was no occurrence of the residual / fixing phenomenon, and the powdery material as the content was discharged while its upper level surface was reduced in a small wave state as shown in FIG.

As described above, according to the granular material storage tank device according to this embodiment, when discharging the contents contained therein as in a conventional granular material storage tank device, the contents are formed into a mortar shape. The decreasing state is eliminated, and as a result, the above-described internal flow phenomenon, bridging phenomenon, or residual / sticking phenomenon does not occur. As a result, first-in first-out is reliably performed, and quality can be stabilized. it can.

The cylindrical body 1 constituting the tank body 14
By coating the inner surface of 1, the inner surface of the cone portion 12 connected thereto and the outer surfaces of the backing plate 17 and the conical portion 15 with a powder adhesion preventing paint, a further effect can be attained for the smooth discharge of the granular material. Can be given.

FIGS. 4 and 5 show a granular material storage tank device 21 according to another embodiment of the present invention. FIG. 4 is a sectional view of this embodiment as in FIG. 1, and FIG. FIG. In the granular material storage tank device 21 of this embodiment, the point that the cone portion 22 formed by the inclined wall having a gentle angle is connected to the cylindrical body 11 is configured as shown in FIGS. 1 and 2. It is different from the granular material storage tank device 10 in the form.

That is, in the granular material storage tank device 21 according to this embodiment, the cone portion 22 is formed at an angle of 20 degrees with respect to the horizontal line. For this reason, it is difficult for the powder 4 as the content to flow naturally to the outlet 13 along the cone portion 22. Therefore, on the inner surface of the cone portion 22,
A sheet 23 called a canvas cloth is laid.

The sheet 23 is not particularly limited as long as it is a material that does not easily cause clogging and has good slipperiness even with fine particles such as cement. It has become clear that a woven fabric formed by weaving, for example, tetron fibers can be used quite satisfactorily as such a material. Then, in this embodiment, a caul plate is not attached unlike the embodiment shown in FIG.
In FIG. 5, reference numeral 24 denotes a canvas cloth holder for laying the canvas cloth 23 on the cone portion 22.

As described above, when the angle of the cone portion 22 with respect to the horizontal line is small, if the sheet 23 having good slipperiness is laid on the surface of the cone portion 22, the powder storage tank device of the first embodiment described above can be used. Similarly, there is no internal flow phenomenon, no bridging phenomenon, no residual / sticking phenomenon, etc., and the stored powder can be discharged. As a result, first-in, first-out can be performed reliably, and quality can be stabilized. Can be planned.

[0032]

As described above, according to the granular material storage tank device of the present invention, an annular concave portion having a W-shaped cross section is formed inside the tank body in cooperation with the cone portion. At the lower end of the concave portion, a passage opening communicating downward along the cone portion is formed, and an opening is formed at the top of the inverted V-shaped chevron portion located at the center of the annular concave portion, and this opening is formed below the cone portion. By communicating, the stored powder can be discharged without internal flow phenomenon, bridging phenomenon, or residual / sticking phenomenon.
The advance is reliably performed, and the quality can be stabilized.

In the granular material storage tank apparatus according to the present invention, the conical portion having the support leg protruding from the bottom edge is attached to form the above-mentioned annular concave portion having a W-shaped cross section inside the tank body. Since it is retrofitted to a conventional tank device of this type already installed as one part, the conventional tank device can be stored without occurrence of internal flow phenomenon, bridge phenomenon, or residual / sticking phenomenon. It can be easily improved so that the powder can be discharged.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing a granular material storage tank device according to an embodiment of the present invention.

2 is a top view of the granular material storage tank device shown in FIG. 1 as viewed from above.

FIG. 3 is an explanatory diagram illustrating a flow at the time of discharging the granular material stored inside the granular material storage tank device shown in FIG. 1;

FIG. 4 is a longitudinal sectional view schematically showing a granular material storage tank device according to another embodiment of the present invention, similar to FIG.

FIG. 5 is a top view similar to FIG. 2 when the granular material storage tank device shown in FIG. 4 is viewed from above.

FIG. 6 is a schematic longitudinal sectional view showing a structure of a conventional granular material storage tank device and an internal flow phenomenon occurring therein.

FIG. 7 is a schematic longitudinal sectional view showing a bridging phenomenon occurring inside a conventional granular material storage tank device.

FIG. 8 is a schematic longitudinal sectional view showing a residual / fixing phenomenon that occurs inside a conventional granular material storage tank device.

[Description of Signs] 4 Granules 10 Granules storage tank device 11 Cylindrical body 12 Cone section 13 Discharge port 14 Tank body 15 Conical section 15a Inclined wall 15b Opening 15c Bottom edge 16 Support leg 17 Backing plate 18 Granular body Arrow 19 indicating the flow of powder 20 annular recessed section having a W-shaped cross section 20 arrow indicating the flow of granular material 21 granular material storage tank device according to another embodiment 22 cone portion 23 canvas cloth 24 canvas cloth retainer

Claims (8)

[Claims] An inverted cone-shaped cone portion is connected to a lower portion of a cylindrical body, and the powder-particle storage tank device includes a tank body provided with a discharge port at a top of a lower end of the cone portion. In cooperation with the above, an annular recess having a substantially W-shaped cross section is formed inside the tank body, and a lower end of the annular recess is formed with a passage opening communicating with the lower end along the cone portion, and the annular recess is formed An opening is formed at the top of an inverted V-shaped chevron located at the center of the cone, and the opening communicates with the lower end of the cone. 2. The annular concave portion having a substantially W-shaped cross section formed in cooperation with the cone portion supports a conical portion having a top opening inside the tank body from the surface of the cone portion. The granular material storage tank device according to claim 1, wherein the granular material storage tank device is configured to be installed at predetermined intervals by legs. 3. A bending plate extending from an inner peripheral surface of the cylindrical body to the cone portion, wherein a contact plate is disposed at a connection portion between the cylindrical body and the cone portion in the tank body. The granular material storage tank device according to claim 1 or 2, wherein: 4. The conical part is fixedly supported on the cone part by a plurality of the supporting legs at or near the bottom edge thereof and attached at intervals in the circumferential direction. The granular material storage tank device according to claim 2 or 3, wherein: 5. The granular material storage tank according to claim 2, wherein an angle of the inclined surface of the conical portion provided in the tank body with respect to a horizontal line is about 55 degrees. apparatus. 6. The granular material storage tank device according to claim 1, wherein a canvas cloth is laid on a surface of the cone portion. 7. The shortest distance between the bottom edge of the conical portion installed in the tank body and the cone portion is about 300 mm.
The granular material storage tank device according to any one of claims 2 to 6, wherein 8. The method of claim 2, wherein the diameter of the opening formed at the top of the conical portion is about 120 mm.
7. The storage device for granular material according to any one of items 7 to 7.