JPS6118486B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) This invention provides a method for efficiently storing powder and granules such as coal and ore indoors on a large scale and having an effective means for discharging the powder and granules. Concerning body storage.

(Prior Art) Recently, there has been a tendency to use coal energy as an alternative to petroleum energy, but in this case, the first problem is the large-scale storage of coal and the method for discharging it.

For example, in order to prevent dust pollution, there is a tendency to use a storage facility with a shed, and a powder storage facility described in Japanese Patent Publication No. 47-46112 is a well-known example of a storage facility developed for this purpose.

As outlined in Figure 1, a truss beam 2 whose inner end is supported by a central pillar 3 is placed on the top of a circular side wall 1, and a roof is placed over this to form a closed structure building (silo). are doing. A hopper 5 is provided along the center column 3, and a bucket-type revolving crane 6 for charging coal into the hopper 5 is installed on the ceiling.

An external delivery conveyor 7 connected to the hopper 5 is installed under the floor.

On the other hand, there is a loading port 9 on the ridge directly above the central column 3.
A ceiling revolving conveyor 4 is also installed on the ceiling, which is opened and connected to this loading port 9. A scraper 4a is attached to the ceiling rotating conveyor 4.

(Problem to be Solved by the Invention) In the case of the powder storage shown in Fig. 1 above, the truss beam 2 on the roof is bent in proportion to the fulcrum span, so the scale (diameter = span) is large. I see that the truss beam 2 is designed to withstand the bending.
Moreover, the size of its constituent members increases, leading to an increase in cost. This increases the difficulty in constructing the roof.

Powder 8 such as coal is fed and stored by a ceiling revolving conveyor 4, and on the other hand, the stored granular material is grabbed from above by a bucket-type revolving crane 6 also installed on the ceiling of the building, and is thrown into a hopper 5 and removed. Because they are taken out, it becomes a sort of first-in, last-out type of handling, which tends to cause dead stock in the stored items.

The ceiling revolving conveyor 4 for carrying in and the bucket type revolving crane 6 for discharging are both installed at approximately the same level on the ceiling of the building, and both are mounted on the center column 1.
Since it is configured to rotate around 3,
For safe operation, it is essential to constantly monitor the relationship between the two, and at least control the operation carefully to avoid collision, which is extremely troublesome. As well,
It's also difficult to work with.

Furthermore, the dropping of coal and other granular materials 8 by the overhead rotating conveyor 4 and the discharging by the bucket-type rotating crane 6 require optimal control of the respective radial positions, making the operations cumbersome.

Both the overhead rotating conveyor 4 and the bucket-type rotating crane 6 are constructed over a long span and are constantly rotating, making maintenance difficult and dangerous. Moreover, since it is subjected to uneven moving loads, it is necessary to have a large structure strong enough to withstand these loads, and as a result, the center column 3 and the circular side walls 1 also need to be reinforced, which is a major factor in increasing costs.

(Means for Solving the Problems) As a means for solving the problems of the above-mentioned prior art, the powder storage of the present invention is as shown in FIGS.
As shown in the example in the figure, (a) the form of the roof 11 on one half of the vertical cross section is made into a substantially inverted V-shape, the outer end of the roof 11 is supported by the peripheral foundation 10, and the inner end is supported by the central pillar 12. The roof 11 is supported, and the roof 11 is continuous in a substantially circular shape centered on the central pillar 12 when viewed from above, and the roof 11 and the surrounding foundation 10 are supported.
The building was made up of

(b) A horizontal beam 13 is installed horizontally on the inside of the top corner of the substantially inverted V-shaped roof 11, and a carrying loop is placed on the horizontal beam 13 in a circular arrangement centered on the center column 12. A conveyor 14 was installed, and the carrying-in loop conveyor 14 and the external carrying-in conveyor 16 were connected in series.

(C) On the other hand, a scraper 17 is installed on the floor of the building, which rotates around the center column 12 and has a dispensing port near the center column 12. A delivery conveyor 19 connected through the pipe was installed under the floor of the building.

Function The roof 11 of this powder storage is approximately inverted V-shaped, and its both ends are supported by the peripheral foundation 10 and the central column 12, and its span is approximately 1/2, so to speak.
It is equivalent to being reduced by half. Therefore, peripheral foundation 10
Despite the fact that there is a long span between the center pillar 12 and the center column 12, the roof 11 is in a state where compression is more dominant than bending, which is mechanically advantageous, and the roof structure can be made lighter and more compact. This contributes to ease of construction and cost reduction.

Moreover, since the roof 11 is continuous in a substantially circular shape centered on the center 12 when viewed from above, the rigidity of the roof as a whole is large and the horizontal and vertical loads are offset, which is advantageous in terms of strength. .

Next, the powder and granular materials such as coal are transported to an external conveyor 1.
6, carry it into the building, and transfer it to the loop conveyor 1.
4, and are placed at a desired position on the carrying loop conveyor 14 that runs in a circular manner centered on the central column 12, and stored. That is, the dropping position of the coal, etc. can be freely selected by operating the carrying-in loop conveyor 14 independently, and the powder and granules form a mountain based on their angle of repose. In particular, the loading loop conveyor 1
4 is located at the top corner of the roof 11 whose vertical cross section has an approximately inverted V-shape, so that the stored powder and granules are always formed into a pile that follows the shape of the roof 11 and efficiently distributed between the rooms in the building. (Fig. 2,
(Figure 6).

On the other hand, a scraper 17 operated on the floor inside the building
Since the pile of stored powder and granules is removed by root, so to speak, in sequence from the end with a movement of turning and moving forward in one direction around the central column 12, there is no risk of dead powder or granules being stored.

Moreover, the scraping machine 17 can be operated independently without considering the operating state of the upper carrying-in loop conveyor 14, and since both can be optimally controlled individually, there is no operational complexity. That is, scraper 17
The pile of powder and granules introduced by the carrying-in loop conveyor 16 can be sequentially disposed of in one direction by breaking them up, while the carrying-in conveyor 16 is moved by a scraping machine 17.
All the powder and granules need to be put in and stored on the floor from which all the powder and granules have been cleanly removed, as if by following the scraper 17, and very simple operation control can be achieved.

(Example) Next, an example of the present invention shown in FIG. 2 and subsequent figures will be described.

In the powder and granular material storage shown in FIGS. 2 and 3, reference numeral 10 in the figures is a peripheral foundation wall raised from the ground (G/L) to a height of about 8 m. This peripheral foundation wall 10 is constructed in a circular shape centered on the central pillar 12 when viewed from above.

In the figure, 11 has an approximately inverted V-shape (including an arch shape) in one half of the vertical cross section, and its outer end is supported by the peripheral foundation wall 10 and its inner end is supported by the central column 12.
The roof is supported at the top of the roof. This roof 11 is continuous in a circular manner over the entire circumference of the peripheral foundation wall 10 centered around the central column 12 when viewed from above, and the entire vertical section of the roof is formed as a folded roof ( Figures 2 and 3). The roof 11 and the peripheral foundation wall 10 constitute a storage building.

As an example, the span between the peripheral foundation wall 10 and the center column 12 is 60 m, and the height above the ground at the highest point of the roof is 38 m.
It is the rank. As shown in FIG. 4, the roof 11 has a roofing material 11b on the outer surface of a roof frame 11a having a truss structure.
It is constructed by laying.

In the figure, reference numeral 13 indicates an H-shaped steel installed approximately horizontally inside the top corner of the approximately inverted V-shaped roof 11 (Fig. 5B).
It is a horizontal beam such as A large number of these horizontal beams 13 are erected at predetermined intervals at substantially the same height positions over the entire circumference of the roof 11 (FIG. 5B), and a loop conveyor 14 for carrying in coal is placed above the central column 12. It is set up in a circular closed loop shape with the center at the center. In the figure, 15 is a vertical stage that stiffens the horizontal beam 13.

An external carrying-in conveyor 16 that carries in granular materials such as coal from the outside penetrates a part of the roof 11 and is connected to the carrying-in loop conveyor 14 .

As shown in FIG. 5, the details of the structure of the loading loop conveyor 14 are as shown in FIG.
Ring channels 144, 144, which serve as coal input guides, are installed on both left and right sides above the rows of..., and gates 14 that can be opened and closed at the bottom of each bucket 143... are installed.
5... is installed, and the gate 145 is operated by the operating mechanism 146.
It is designed to be opened and closed by. 14 in the diagram
7 is an operating section of the operating mechanism 146.

The ring girder has its rails 141, 141 supported by bearing rollers 148 on the horizontal beams 13. Further, the drive pins 149 on the inner side are fed and rotated by a drive wheel 140 rotated by a prime mover (not shown).

Therefore, this carrying-in loop conveyor 14 can automatically feed loaded powder and granular materials such as coal by simply installing the operating section 146 at any position along the path along which the ring girder rotates. .

Next, a reclaimer 17, which is a scraper for scraping out stored granular materials such as coal, is installed on the floor of the storage warehouse surrounded by the peripheral foundation wall 10. The reclaimer 17 has a dispensing port near the center column 12 and is installed so as to be able to pivot freely around the center column 12.

Further, a delivery conveyor 19 installed in a tunnel 18 under the floor is connected through a delivery port opening around the center column 12, and is configured to deliver stored coal, etc.

In the figure, numeral 20 indicates a pile of stored powder and granular materials such as coal.

That is, in this powder storage, coal, etc. to be stored are loaded onto the carry-in conveyor 16. Then, this coal etc. is transferred to a basket 143 surrounded by ring channels 144, 144 on the carry-in loop conveyor 14 at the end of the carry-in conveyor 16, and is transferred to a basket 143 surrounded by ring channels 144, 144 on the carry-in loop conveyor 14, by opening a gate 145 at a designated position in the storage warehouse. It is thrown into the position directly below to form a mountain 20. By sequentially moving the input position forward along the path of the carrying-in loop conveyor 14, the piles 20 of coal, etc. can be successively built up over the entire area of the storage.

The loading position is controlled by remote control of the loading loop conveyor 14.

On the other hand, the discharge of stored coal, etc. is carried out by operating the reclaimer 17 on the floor, and moving (advancing) the piles of stored coal sequentially from the front lower part and in a fixed direction around the central column 12 to break up the piles. By putting it into the delivery port in the center of the interior, it is loaded onto the delivery conveyor 19 and carried out to the outside.

The coal storage efficiency of this powder storage is expected to be approximately 8.7 tons/m ² .

(Second Embodiment) Most of the configuration of the powder storage shown in FIG. 6 is the same as that of the first embodiment. A feature of the storage warehouse of this embodiment is that a dome-shaped roof 22 is installed twice to cover the sky above an inverted cone-shaped depression 21 in the center of the folded roof 11.

That is, if the inverted cone-shaped depression 22 is left as it is, a large amount of rainwater will concentrate at the bottom of the depression 22 during rainfall, and it is necessary to take great care in how to remove it. However, the dome-shaped roof 22 solves this problem. It is sufficient that the dome-shaped roof 22 simply guides rainwater to the outside of the recess 21.
Moreover, since the length of the roof is relatively small, it can be constructed at low cost using a simple and compact roof frame.

(Effects of the Invention) As described above in detail in conjunction with the embodiments, the powder storage of the present invention has a roof 11 in which one half of the roof 11 in vertical cross section has a substantially inverted V-shape. is relatively small and a considerable part of the load can be handled by compressive force, which is advantageous in terms of strength, so the roof frame can be constructed in a simpler and smaller size, and costs can be reduced.

In addition, a horizontal beam 13 is installed inside the top corner of the roof 11.
Since it has a configuration in which a loop conveyor 14 for carrying in is installed on top of the loop conveyor 14 in a circular manner, it is extremely easy to install the loop conveyor 14 for carrying in, and it can be operated completely separately from the extractor 17 on the floor. It's very convenient. Moreover, since the load of the carrying-in loop conveyor 14 is transmitted as a compressive force to the roof 11 through the horizontal beams 13, this is also advantageous for the load-bearing capacity of the roof.

Moreover, since the carrying-in loop conveyor 14 is installed in a circular manner at a position approximately 1/2 the radius of the storage, the powder and granules can be simply fed into a pile 20 that follows the shape of the space inside the building. Since it is built up, storage efficiency is high.

Since the loading loop conveyor 14 is installed at a fixed position, it can be easily controlled and maintained. In addition, the horizontal beam 13 is the roof 1
It is also effective in preventing thrust (1).

Next, since the loading loop conveyor 14 eliminates the need for an expensive stacker, it is extremely economical. Due to the function of the dispensing machine 17 on the floor, stored items can be efficiently dispensed without causing any dead stock.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a conventional storage, Figs. 2 and 3 are an external perspective view and a vertical sectional view showing a powder storage which is a first embodiment of the present invention, and Fig. 4 is a roof. A detailed view showing the relationship between the frame and the loop conveyor for carrying in, Figures 5A and 5B are vertical sectional views in the side and front directions showing details of the structure of the loop conveyor for carrying in, and Figure 6 is a diagram showing the structure of the loop conveyor for carrying in. FIG. 2 is a sectional view showing a powder storage according to a second embodiment.

Claims (1)

[Claims] 1. The form of the roof 11 on one half of the vertical cross section is approximately inverted V-shape, and the outer end of the roof 11 is supported by a peripheral foundation 10 and the inner end is supported by a central column 12. When viewed from above, this roof 11 is continuous in a substantially circular shape centered on the central column 12 to form a mote building, and a small horizontal beam is installed inside the apex corner of the substantially inverted V-shaped roof 11. A loop conveyor 14 for carrying in is installed on the horizontal beam 13 in a circular arrangement centered on the central column 12, and this loop conveyor 14 for carrying in is connected to an external carrying conveyor 16. On the other hand, a scraper 17 is installed on the floor of the building, which rotates around the center column 12 and has a dispensing port near the center column 12, and is connected to the scraper 17 through the dispensing port. A powder storage warehouse characterized in that a delivery conveyor 19 is installed under the floor of a building.