JP2933866B2 - Rotating storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotary storage tank.
More specifically, the present invention relates to a rotary storage tank for storing desulfurized gypsum, coal combustion ash, and other granular materials.

[0002]

2. Description of the Related Art Conventionally, as a storage tank for storing a large amount of granules, a rotary storage tank which can store a large amount of granules in a small area, that is, can reduce the occupied area per unit area, is generally used. is there. As an example, a rotary storage tank disclosed in Japanese Patent Application Laid-Open No. Sho 62-140929 has a rotatable annular storage tank 51 and a rotatable storage tank 51 as shown in FIGS. 5 (a) and 5 (b). And a granular material transporting machine 53 having a collector 52 for collecting the granular material P at the tip thereof. Then, the powder P is placed on the powder transporter 53 while the storage tank 51 is rotated and the powder P is collected by the collector 52. The granular material P carried out from the storage tank 51 by the granular material transporter 53 is transported to a predetermined carrier of a carry-out vehicle such as a dump truck 55 by, for example, a belt conveyor 54 or the like.

[0006] As shown in FIG. 6 ((a) is a partial plan view, (b) is a partial front view, and (c) is a partial side sectional view), the storage tank 51 has an outer shell plate 56 and an inner shell plate. Both 57 are formed by welding curved steel plates together by welding. Reinforcing ribs 58 made of so-called L-shaped steel or channel steel are fixed to the outer surfaces of both the outer shell plate 56 and the inner shell plate 57 by welding. On the other hand, the bottom plate 5
Reference numeral 9 also denotes a steel plate joined by welding to form an annular shape, and the lower surface thereof has reinforcing ribs 6 made of so-called H-shaped steel or the like.
0 is fixed by welding. This bottom reinforcement rib 6
The arrangement of zeros is illustrated in FIG.

[0004] As described above, the conventional storage tank 51 is capable of reducing material cost, reducing weight, and facilitating welding (butt welding of steel plates) as compared with increasing the thickness of the steel plates of the inner and outer shell plates 57 and 56 and the bottom plate 59. Is more difficult as the thickness of the steel plate is larger), and it is advantageous in terms of transportation convenience and the like. Therefore, a steel plate as thin as possible and a large number of reinforcing ribs 58 and 60 are used.

[0005]

However, in the conventional storage tank 51, since a large number of reinforcing ribs are fixed by welding as described above, the period required for manufacturing and installing the same is long. Users have demanded further reductions in delivery times, and have also demanded further reductions in prices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to improve the strength by using a corrugated steel plate or a curved steel plate, thereby reducing the number of materials and the welding process as much as possible. Accordingly, an object of the present invention is to provide a rotary storage tank capable of achieving a significant reduction in weight, a significant reduction in manufacturing, installation man-hours, and a reduction in manufacturing costs as compared with conventional products.

[0007]

According to a first aspect of the present invention, there is provided a rotary storage tank comprising: a cylindrical outer shell; and a cylindrical inner shell disposed coaxially at a distance in the outer shell. and a body plate, a rotating reservoir ing from the bottom plate of the annular arranged on their bottom so as to close the gap between the outer shell plate and the inner shell plate, the outer shell plate and the inner shell plate are both Contact is formed from corrugated plate
And the bottom plate is in a vertical plane including an arbitrary radius of the rotary storage tank.
The cut cross-sectional shape is a substantially partial circular shape that swells upward.
It is characterized by being formed from a plate member that is curved to exhibit .

According to the rotary storage tank of the first aspect, the strength as a structure equivalent to that of the conventional product can be obtained even when the inner and outer shell plates are not particularly provided with reinforcing ribs and a thinner plate material is employed. (Hereinafter, referred to as structural strength), the weight can be greatly reduced, and the welding process can be drastically reduced. Thus, the effect of synergistically reducing the product cost can be obtained. In addition, especially the reinforcement rib is used for the bottom plate
Even without adopting a plate material of the same thickness as the conventional product,
Even greater strength with the same structural strength as conventional products
Weight can be reduced, and the welding process can be drastically reduced.
As a result, product cost is reduced synergistically.

According to a second aspect of the present invention, there is provided a rotary storage tank comprising: a cylindrical outer body plate; a cylindrical inner body plate coaxially disposed in the outer body plate at a distance; a rotating reservoir Ru bottom plate and color of annular arranged at their bottom so as to close the gap between the plate and the inner shell plate, the outer shell plate and the inner shell plate are both formed from corrugated board , The bottom plate is rotating
The cross-sectional shape cut on the vertical plane including the arbitrary radius of the storage tank is
Curved so as to have a substantially partial circular shape bulging toward
It is characterized by being formed from a flat plate member .

According to the rotary storage tank of the second aspect ,
As with the rotary storage tank of the first embodiment , the inner and outer shell plates are particularly supplemented.
Without using strong ribs and using a thinner plate than conventional products
Even if used, the strength as a structure equivalent to the conventional product (hereinafter, referred to as
Structural strength) and significant weight reduction
To reduce the welding process drastically.
Product cost is reduced, and even if the bottom plate does not use any special reinforcing ribs and adopts a steel plate of the same thickness as the conventional product, it will have the same structural strength as the conventional product, and will be even more significant a weight reduction is possible, since the allowed to deplete the welding process, synergistically product costs Ru cormorants exhibit the effect that decreases.

[0011] Then, in the rotary storage tank of all the above aspects,
And engaged by a bolt clamping means and the lower edge of the shell plate and the peripheral edge of the bottom plate, the bolt clamp means, before
Any of the peripheral edge of the bottom plate and the lower edge of the body plate
One is curved into a U-shaped cross section, and the other is a U-shaped curved portion.
It is preferable to insert the bolts into the bolts and then bolt them , since the troublesome skill of welding is greatly reduced and various inspections after welding are also reduced, so that the number of working steps and the manufacturing cost can be reduced.

The body plate and the bottom plate are usually made of a steel plate, but may be made of a non-ferrous metal, a synthetic resin or the like according to the storage object, the installation place or the size of the storage tank.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a rotary storage tank according to the present invention will be described with reference to an embodiment shown in the accompanying drawings.

FIG. 1 is a side sectional view showing an embodiment of the rotary storage tank of the present invention, and FIG. 2 (a) is a bottom connection of the rotary storage tank of FIG.
Is a fragmentary cross-sectional view of an example of embodiment, FIG. 2 (b) class
Partial cross-sectional view showing a reference example of pump, Fig 3 is a side cross-sectional view showing another embodiment of a rotating reservoir of the present invention, FIG. 4 of the rotating reservoir
It is a side sectional view showing a reference example .

In FIG. 1, reference numeral 1 denotes a rotary storage tank, which comprises an annular storage tank 2 and a rotation driving device 3 for rotating the storage tank 2 around its own axis. The rotary driving device 3 is a known device including a motor and a speed reducer. The storage tank 2 has a cylindrical large-diameter outer shell 4, a small-diameter inner shell 5 disposed coaxially inside the outer shell 4, and a gap between the outer shell 4 and the inner shell 5. And a ring-shaped bottom plate 6 fixed to the bottoms of the members 4 and 5 so as to close them.

As shown, both the outer shell 4 and the inner shell 5 are formed of corrugated steel. Since the granular material is stored in the space S between the outer shell plate 4 and the inner shell plate 5, the granular material applies an internal pressure to the outer shell plate 4 and an external pressure to the inner shell plate 5. However, since both body plates 4 and 5 are formed of corrugated steel plate, the section modulus is much larger than that of the conventional flat steel body plate, and the material strength becomes much larger by plastic working called wave forming. ing. Therefore, it is not necessary to fix the reinforcing ribs by welding as in the related art, so that the weight is greatly reduced and the required structural strength is obtained.

The body plate is generally formed by connecting a plurality of corrugated steel plates (referred to as body plate elements) each partially curved in a cylindrical shape. The main body plates 4 and 5 have no problem in using the method. The body plate elements may be connected by welding in the same manner as in the prior art, or bolts may be used. When bolts are used, the edges of adjacent body plate elements are slightly overlapped with each other by a certain size and holes that match the two are drilled and bolted, or the edges of adjacent body plate elements are butted together. Alternatively, a separate connecting plate may be overlapped on both elements, and holes may be formed in the connecting plate and both elements, and bolted. For the body plate element, for example, in a storage tank having an outer body diameter of 23 m and an inner body diameter of 9 m, in the case of the outer body plate, the entire circumference is divided into 24 to 36 units every 10 to 15 °. In the case of the body plate, a body plate whose entire circumference is divided into 8 to 12 every 30 to 45 ° can be used.

On the other hand, as shown in the figure, the bottom plate 6 is in the shape of a scallop bulging upward along the longitudinal direction of the bottom plate 6 (the circumferential direction of the storage tank). So to speak, it is on the mirror bottom. In other words,
The bottom plate 6 is curved so that the cross-sectional shape of the storage tank 2 cut along a vertical plane including an arbitrary radius has a substantially partial circular shape bulging upward. By forming the bottom plate 6 in this way, the strength of the structure is improved. Thereby,
There is no need to fix a large amount of reinforcing ribs on the bottom surface of the bottom plate as in the conventional product by welding, and a lighter bottom plate with almost the same strength can be completed with far fewer man-hours.

The bottom plate is generally formed in a ring shape by connecting a plurality of fan-shaped steel plates (referred to as bottom plate elements). The bottom plate 6 has no problem in using the method.
The bottom plate elements may be connected by welding in the same manner as in the related art, or bolts may be used. When bolts are used, the edges of adjacent bottom plate elements are slightly overlapped with each other by a certain size and holes corresponding to both are drilled and bolted, or the edges of adjacent bottom plate elements are abutted and separated. The connecting plate of the body may be overlaid on both elements, and holes may be drilled and bolted to correspond to the connecting plate and both elements. As the bottom plate element, for example, a fan-shaped element having a size obtained by dividing the entire circumference by 24 to 36 every 10 to 15 ° (so-called opening angle of the fan) can be used.

Next, the connection between the lower edge of each of the body plates 4 and 5 and the inner and outer peripheral edges of the bottom plate 6 may be connected by welding as in the conventional case. However, it is preferable to connect with a bolt fastener in order to improve workability, reduce the number of manufacturing steps, and reduce the manufacturing cost.

For example, as shown in FIG.
Is bent into a U-shaped cross section to form an engaging portion 7, and a hole 8 for a bolt is formed in the engaging portion 7.
The bolt holes 8 are provided in the lower edges 9 of the body plates 4 and 5, respectively.
A hole 10 for a bolt corresponding to the above is drilled. Then, the lower ends 9 of the two body plates 4 and 5 are inserted into and engaged with the engaging portion 7, and then the bolts are connected. Conversely, both body plates 4,
An engaging portion may be formed at the lower end edge of 5, and the inner and outer peripheral edges of the bottom plate may be inserted and engaged with the engaging portion. In addition, both body plates 4, 5
An engaging portion is formed at one of the lower edges of the bottom plate, a corresponding peripheral edge of the bottom plate is inserted and engaged with the engaging portion, an engaging portion is formed at the other peripheral edge of the bottom plate, and a lower end of the other body plate is formed thereon. The rim may be in charge engagement.

Further, what is shown in FIG. 2 (b), the bottom plate 6
Are formed in such a shape that the inner and outer peripheral edges thereof slightly overlap the lower end edges of both body plates 4 and 5.
The and the clamp 12 is engaged so as to sandwich bolted
This is a reference example . That is, the clamp 12 is connected to the overlapping portion 11
A plurality of members having a U-shaped cross-section so as to be able to engage with a plurality of members, all of which have a circular arc shape. Overlapping part 1
Bolt holes that match each other are drilled in advance in the clamp 1 and the clamp 12, respectively. The clamp 12 may be used on one or both of the inner peripheral side and the outer peripheral side. When only one clamp 12 is used, the other may be connected by welding or the method shown in FIG.

The above-described bolting method and known bolting methods correspond to the bolt fastener described in the claims.

Next, FIG. 3 shows another embodiment of the storage tank. The storage tank 13 includes the storage tank 2 shown in FIG.
Only the shape of 4 is different. In other words, the bottom plate 14 is in the shape of a kamaboko that bulges downward (bulges upward in FIG. 1). The same effect as the above-described bottom plate 6 is also achieved by the bottom plate 14.

Next, FIG. 4 shows a reference example of the storage tank. This storage tank 15 does not have an inner body plate, but has an outer body plate 4 and a bottom plate 1.
6 is a cylinder with a bottom.

The structure of the outer shell 4 and the outer shell 4 and the bottom plate 16
The connection mechanism is the same as that of the storage tank 2 of FIG. 1 and the storage tanks 2 and 13 of FIG. 3, respectively. Only the bottom plate 16 is the two storage tanks 2,
13 and has a partially spherical shell shape bulging upward. The weight of the storage tank 15 also shell plate and the bottom plate, the structure strength, that Sosu the same effect as the in the number of manufacturing steps and the manufacturing cost or the like storage tank 2,13 (Figure 1,3).

[0027] One technique, substantially the same volume (approximately 2110M3) a reservoir according to the storage tank and comparative examples according to an embodiment of the present invention and compared with conditions set to be substantially the same intensity.

[0028]

Embodiment 1 As shown in FIG. 1, the outer body plate has a diameter DO of 23000 mm, the inner body plate has a diameter DI of 9000 mm and an effective height H of 6000 mm.
As a result, the total weight of both body plates was about 22 ton, and the weight of the bottom plate was about 63 ton. The corrugated steel plate used for the body plate had a waveform wavelength of 150 mm and a total wave height of 48 mm on both sides.

[0029]

Embodiment 2 The dimensions are the same as those shown in FIG. 3, and the dimensions are the same as those in Embodiment 1, except that the curvature of the bottom plate is simply reversed (the sign of the radius of curvature is reversed). Only. As a result, the weight distribution was the same as in Example 1.

[0030]

REFERENCE EXAMPLE 1 The dimensions are as shown in FIG. That is, in order to make the volume equal to those of the first and second embodiments and the comparative example without the inner body plate, the diameter DO of the outer body plate was set to 21.
The effective height H is 500 mm and the effective height H is 6000 mm. As a result, the weight of the body plate was about 14 ton, and the weight of the bottom plate was about 60 ton. The corrugated steel plate used for the body plate is the same as that of the first and second embodiments.

[0031]

Comparative Example 1 The structure and shape are the same as those of the conventional product shown in FIGS. 6 and 7, the outer body plate diameter DO is 23000 mm, the inner body plate diameter DI is 9000 mm and the effective height H is 6000 m.
m. As a result, the total weight of both body plates including the reinforcing ribs was about 55 ton, and the weight of the bottom plate was about 90 ton including the reinforcing ribs.

As described above, in Examples 1 and 2, the weight of the body plate was reduced by 60% in comparison with the comparative example, and the weight of the bottom plate was reduced by 30% in comparison with the comparative example. As a result, 41% of the comparative example was reduced. As a result, significant cost reduction has become possible.

Further, in Reference Example 1 , the weight of the body plate was reduced by 75% in comparison with the comparative example, the weight of the bottom plate was reduced by 33% in comparison with the comparative example, and the total weight was reduced by 49% in comparison with the comparative example. It became. As a result, a significant cost reduction was possible in Reference Example 1 .

In Examples 1 and 2 and Reference Example 1 , only the body plate is made of a corrugated steel plate and the bottom plate is made of a flat plate and a reinforcing rib equivalent to the conventional product, or only the bottom plate is made of no rib. It is apparent that even if a curved steel plate is adopted and the body plate uses a flat plate and a reinforcing rib equivalent to those of the conventional product, the weight is considerably reduced and the product cost is reduced.

The thickness and corrugated dimensions of the body plate and the radius of curvature and thickness of the bottom plate may be combined so as to obtain the required strength in accordance with the shape, size and volume of the storage tank.

[0036]

The rotary storage tank of the present invention maintains the same volume and the same structural strength as the conventional product while maintaining the same capacity.
The product weight is much smaller and the number of manufacturing steps is greatly reduced, so that the overall product cost is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a rotary storage tank of the present invention.

FIG. 2 (a) is a view of a bottom connection configuration of the rotary storage tank of FIG. 1;
Is a fragmentary cross-sectional view showing an example, FIG. 2 (b) of the clamp
It is principal part sectional drawing which shows a reference example .

FIG. 3 is a side sectional view showing another embodiment of the rotary storage tank of the present invention.

It is a side sectional view showing a reference example of FIG. 4 Rotation reservoir.

5A and 5B show an example of a granular material storage system to which a rotary storage tank is applied, wherein FIG. 5A is a plan view and FIG. 5B is a front sectional view.

6 (a) is a partial plan view, FIG. 6 (b) is a partial front view, and FIG. 6 (c) is a partial side sectional view showing an example of a conventional rotary storage tank.

FIG. 7 is a partial bottom view showing a bottom reinforcing rib of the conventional rotary storage tank shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotary storage tank 2 ... Storage tank 4 ... Outer body plate 5 ... Inner body plate 6 ... Bottom plate 7 ... Engagement part 12 ... Clamp 14 ... Bottom plate 15 ...・ Outer body plate 16 ・ ・ ・ Bottom plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-140929 (JP, A) JP-A-7-206085 (JP, A) Fully open 58-154374 (JP, U) Really open 52 150016 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65G 65/30 B65D 88/06 E04H 7/30

Claims (3)

(57) [Claims] 1. A cylindrical outer body plate, a cylindrical inner body plate disposed coaxially at a distance in the outer body plate, and a gap between the outer body plate and the inner body plate closed. to as a rotating reservoir ing from the bottom plate of the annular arranged on their bottom, said outer and cylinder plate and the inner cylinder plate are both formed from corrugated board, the bottom plate is, any rotation reservoir Including the radius of
Substantial part whose cross-sectional shape cut in the vertical plane swells upward
A rotary storage tank formed from a plate member that is curved so as to have a circular shape . 2. A cylindrical outer body plate, a cylindrical inner body plate disposed coaxially at a distance in the outer body plate, and a gap between the outer body plate and the inner body plate closed. a rotating reservoir Ru color and the bottom plate of the annular arranged on their bottom so as to be, the outer and cylinder plate and the inner cylinder plate are both formed from corrugated board, the bottom plate is, any of the rotating reservoir Including radius
Substantial part whose cross-sectional shape cut in the vertical plane swells downward
A rotary storage tank formed from a plate member that is curved so as to have a circular shape . 3. The peripheral edge of the bottom plate and the lower edge of the body plate are
Engaged by bolt-type clamping means, the bolt-type clamping means being connected to the periphery of the bottom plate and the
One of the lower edges of the body plate is curved into a U-shaped cross section
And insert the other into the U-shaped curved part
3. Stopping according to any one of claims 1 or 2.
Rotation reservoir of.