JP4043652B2 - Roof structure of powder storage facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a granular material storage facility that efficiently stores a large amount of granular material represented by coal by production area and type, and mechanized by a first-in first-out method. For example, the present invention relates to a roof frame that protects powder particles during storage from wind and rain and prevents scattering.
[0002]
[Prior art]
Conventionally, for example, JP-A-61-145038 and JP-A-61-61 are known as powder storage facilities for efficiently storing a large amount of powder particles typified by coal and mechanizing them using a first-in first-out method. As disclosed in Japanese Patent No. 18240, a storage container such as a silo is constructed, a roof is installed on the upper part thereof, a loading conveyor is connected to the roof part, and a storage material discharge conveyor is provided at the lower part of the silo. The installed technology is disclosed.
[0003]
Next, the granular material storage facility described in Japanese Patent Application Laid-Open No. 57-85706 is supported by a peripheral foundation at the outer peripheral edge, and supported by a single central pillar at the inner edge. A roof with a mountain-shaped cross section is formed with the central column as a symmetry point and a circular plane, and a loading loop conveyor is installed at the top of the mountain-shaped roof. The conveyor is connected, and the scraper and the payout conveyor are installed on the floor.
[0004]
The suspended roof type granular material storage facility described in Japanese Patent Application Laid-Open No. 58-113455 includes a carry-in conveyor that is erected in a straight line by a plurality of columns built at a constant pitch by an arrangement of two rows of columns. An external conveyor connected to the carry-in conveyor, a storage space for powder particles immediately below the carry-in conveyor, a payout conveyor installed in the basement, and a suspension cable installed above and below in the column direction of the columns A cable net-shaped suspended roof knitted into a curved surface (HP curved surface) based on the suspension cable and the retainer cable, and the suspension cable laid between the above cables and the sub girder support in the perpendicular direction. It is configured.
[0005]
[Problems to be solved by the present invention]
As described above, conventionally, it has already been done to cover the surroundings of the granular material to be stored, to prevent wind and rain, and to build a roof for the purpose of preventing scattering to the outside.
[0006]
However, as disclosed in the above-mentioned JP-A-61-145038 and JP-A-61-1240240, a storage facility in which a storage container such as a silo is constructed and a roof is installed on the upper end thereof is not apparent. It is reasonable. However, for example, it is important to store coal efficiently in large quantities according to production areas and types. To that end, the number of silos must be increased, resulting in a very expensive facility in total. In addition, the area occupied by the storage facility becomes large, which is uneconomical.
[0007]
The particulate storage facility described in the above-mentioned Japanese Patent Application Laid-Open No. 57-85706 is characterized by a roof frame having a mountain-shaped cross section between the peripheral foundation and the central column. In other words, the stress load of the roofing material and the thrust force on the column base (horizontal force in the radial direction) are reduced by a fraction of those when a large space dome roof without pillars is built using the surrounding foundation as a reaction point. It is assumed that the roof material cross section can be reduced in size and weight. However, in the case of this granular facility, the entire floor between the surrounding foundation and the central pillar is used as a granular storage space, and a pile of granular particles thrown in by turning the loop conveyor on the roof ceiling is placed there. Since it is built, it will be constructed under the floor of the heavy storage powder granulate and a conveyor and other underground facilities. Therefore, it is uneconomical to construct an underground structure with a large cross section so as to withstand the loading load of stored granular materials. Since the large loading load of the stored granular material also acts as a thrust force on the surrounding foundation through the ground, it is necessary to construct the surrounding foundation enormously so as to withstand these, and it becomes uneconomical. In addition, since the central column is a structure that supports the central load of the roof load at one point, this central column becomes a huge structure, and as a result of a large number of supporting piles etc. that support the column, this center There is also an inconvenience that it is difficult to install facilities necessary for storage of the granular material in the column part.
[0008]
The suspended roof type granular material storage facility described in the above-mentioned Japanese Patent Application Laid-Open No. 58-113455 is reasonably constructed as a cable net-like suspended roof knitted into a curving surface (HP curved surface). . However, on-site construction of a suspended roof is technically difficult, and the storage space for the granular material is directly below the carry-in conveyor built up in a straight line by multiple columns, and a payout conveyor is installed under the floor. Because of the construction, the payout conveyor is uneconomical because it is forced to construct a large cross-sectional structure that can withstand a huge load of stored powder particles.
[0009]
The purpose of the present invention is an open-air (blue ceiling) structure that is not subject to any roof load within the range of the compression ring at the center (inner periphery), and the facilities required for storage facilities are tolerated within that range. It can be economically constructed with a small cross-sectional structure that is advantageous in load design, while a roof with a mountain-shaped cross section that is built in a donut shape between the tension ring on the outer periphery and the compression ring on the inner periphery It is to provide a roof structure of the granular material storage facility in which the outer pillar is rationally supported by the tension ring and the inner pillar is reasonably supported by the compression ring.
[0010]
Another object of the present invention is to provide a main roof joint material for positioning a plurality of granular piles on a radiation passing through adjacent contact portions in plan view, an inward position of the tension ring and an outward direction of the compression ring. Intermediate pillars are built at each position, supported by these intermediate pillars, outer pillars, and inner pillars, and the pillars (footing foundations) are connected together by foundation beams between the intermediate pillars and outer pillars or inner pillars. And providing a roof structure for the granular material storage facility improved to a structure in which the stress of the roof surface of the partial race structure having low rigidity is effectively transmitted to the tension ring and compression ring by the main roof joint material. That is.
[0011]
The next object of the present invention is to provide a granular material storage facility in which the circumferential interval between the main roof joint members supported by adding an intermediate column to the outer column and the inner column is continuous with the brace structure roof surface. Is to provide a roof frame.
[0012]
A further object of the present invention is to reduce the horizontal force (thrust force) acting on the supporting piles near the tunnel (tunnel) where the under-floor payout conveyor is installed, reduce the number of piles, and interfere with the payout conveyor, etc. It is to provide a roof structure of a granular material storage facility that is configured to avoid the above.
[0013]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the roof frame of the granular material storage facility according to the invention described in claim 1 is:
A tension ring is disposed on the outer peripheral edge, and a compression ring is disposed on the inner peripheral edge. A portion between the tension ring and the compression ring is used as a storage space for the granular material. Forming a plurality of adjacent piles in a plan view of the mountain of the body,
The roof is formed in a cross-sectional shape between the tension ring and the compression ring into a substantially similar mountain shape that is larger than the bottom width and height of a mountain of a single granular material, and a plurality of these are continuously formed in the circumferential direction. A roof frame with a donut-shaped plane is constructed so as to cover all of the piles of
When viewed in plan, the plurality of granular particles are positioned on the radiation passing through adjacent contact portions, and intermediate pillars are respectively set at the inner position of the tension ring and the outer position of the compression ring. The outer pillar built in the position of the tension ring and the inner pillar built in the position of the compression ring and the intermediate pillar are connected by the foundation beam, and the main roof is connected to each of the intermediate pillar, the outer pillar, and the inner pillar. It is characterized in that a palm material is supported.
[0014]
Invention of Claim 2 is arrange | positioned in the position on the radiation which passes through the contact part to which the piles of several granular material see planarly in the roof frame of the granular material storage facility described in Claim 1 The main roof joint members supported by the intermediate column, the outer column, and the inner column are configured such that the circumferential interval portion is continuous by the brace structure roof surface.
[0015]
Embodiments and Examples of the Invention
Embodiments of the roof frame of the granular material storage facility according to the invention described in claims 1 and 2 are shown in FIG.
[0016]
FIG. 1 is a bird's-eye view of the concept of a roof frame, in which a tension ring 1 is disposed on the outer peripheral edge and a compression ring 2 is disposed on the inner peripheral edge. The floor surface 3 of the part between the tension ring 1 and the compression ring 2 is used as a storage space for the granular material. The granular material to be stored has a pile 4 of the granular material in the part 3 as shown in FIG. A plurality (six in the illustrated example) are formed adjacent to each other (in a concentric arrangement).
[0017]
3 and 4, the tension ring 1 is formed in a regular hexagonal shape in plan view, and the above-mentioned peak 4 of each granular material connects the center of the roof and the six corners of the tension ring. It is an arrangement having a center on the radiation. However, the installation portion of the external payout conveyor 19 is configured to ensure an empty space B having an equivalent width B necessary for the installation. The piles 4 of each granular material are arranged along the radiation passing through the position of the central portion thereof, and are installed in an arrangement in which individual carry-out conveyors 20 are connected to the collection place 21 at the center of the roof under the floor. The product is transported to a target place by an external delivery conveyor 19 via the collection area 21.
[0018]
The roof of this granular material storage facility has a bottom surface width D and a height H of one granular particle mountain 4 as a cross-sectional shape spanning a portion 3 between the tension ring 1 and the compression ring 2 which is a storage space. In the illustrated example, it is formed in a substantially similar mountain shape slightly larger than (see FIG. 2) (FIG. 2), and is continuous in the circumferential direction so as to cover all of the plurality of powder particle peaks 4. It is constructed as a roof frame whose plane is a regular hexagonal donut shape (FIG. 6).
[0019]
The roof frame shown in FIG. 1 and FIG. 2 is constructed such that an outer roof member 11 having a mountain shape is laid between the tension ring 1 at the outer peripheral edge and a top outer ring 12 located at the roof top portion. 13 is constructed between the compression ring 2 on the inner peripheral edge and the top inner ring 14 located on the roof top. And the inner ring 14 and the outer ring 12 at the top part are connected by a connecting member 15 in a horizontal radial arrangement.
[0020]
Therefore, the load acting on the mountain-shaped roof members 11 and 13 is less than that of the tension ring 1 on the outer peripheral edge, as compared to the case where the structure illustrated as a dotted line 17 in FIG. The magnitude of the reaction force at the position is reduced to about 1/3 of the vertical reaction force and to about 1/8 of the horizontal reaction force (thrust force). Therefore, the cross-sections of the constituent members of the roof members 11 and 13 can be reduced to about 1/8, and the cross-sections of the tension ring 1 and the compression ring 2 can be reduced accordingly.
[0021]
An external conveyor 22 is arranged below the horizontal connecting material 15 as shown in FIG. 1, and a carry-in conveyor 23 connected to this is installed in the circumferential direction for each mountain 4 (FIG. 2). The other end is connected to a charging chute 18 at a position where the above-mentioned ridges 4 should be individually formed immediately after dropping the granular material (see FIG. 2).
[0022]
More specifically, in order to make it easy to understand FIGS. 3 and 4, the plurality of powder peaks 4, 4 are located at the same positions on the radiation P passing through adjacent contact portions when viewed in plan. Intermediate columns 5 and 6 are erected on the line at a position inside the tension ring 1 and a position outside the compression ring 2, respectively. Incidentally, the radiation P is arranged so as to pass through substantially the midpoint of the straight line connecting the corners of the tension ring 1 arranged in a regular hexagonal plane as shown in FIGS. The outer pillar 7 built at the position of the tension ring 1 and the inner pillar 8 built at the position of the compression ring 2 and the intermediate pillars 5 and 6 are based on the respective column bases 10 (footing foundations). The beam 9 is connected in series with a structure capable of transmitting a horizontal force.
[0023]
A main roof joint material 16 is arranged in a mountain shape at a position on the radiation P, and the main roof joint material 16 is supported by a total of four pillars including the intermediate pillars 5 and 6 and the outer pillar 7 and the inner pillar 8. Has been. The upper ends of the main beam joint members 16 are also joined to the top outer ring 12 and the top inner ring 14 described above.
[0024]
The roof frame composition is shown in FIG. The load of the main roof joint material 16 having a mountain shape is supported by being divided and supported by each of the intermediate pillars 5 and 6 and the outer pillar 7 and the inner pillar 8, and the load burden on the outer pillar 7 and the inner pillar 8 is It is reduced to a fraction. Moreover, as shown in FIG. 5, the roof frame with the intermediate column 6 installed is compared to the roof frame of the general part (see FIG. 2, there is no intermediate column) due to the presence of the intermediate column 6 and the connection effect by the foundation 9. Thus, the resistance to horizontal force can be increased. Therefore, the roof frame of FIG. 5 in which the intermediate column 6 is installed can share more horizontal force generated during an earthquake or strong wind than a general roof frame. As a result, the horizontal force shared by the frame near the cave where the underfloor conveyor at the peripheral position is shared is reduced, the number of supporting piles in that portion is reduced, and interference with the arrangement of the conveyor is avoided.
[0025]
Incidentally, the main roof joint material 16 is configured in a truss beam structure, and an H-shaped steel tension ring 1 is installed as an example at the intersection with the outer column 7 as illustrated in FIG. In addition, a square steel tubular compression ring 2 is installed at the intersection with the inner column 8 as an example (the invention according to claim 1 above).
[0026]
As described above, the cross section of the section between the outer peripheral tension ring 1 and the inner peripheral compression ring 2 is mounted in a substantially mountain shape, and the peaks of the plurality of powder particles are adjacent to each other in plan view. The main roof joint members 16 arranged at positions on the radiation passing through the section and supported by the intermediate column 6, the outer column 7 and the inner column 8 are arranged at intervals in the circumferential direction as shown in FIG. Therefore, the stress of the roof surface 24 of the brace structure having low rigidity is effectively transmitted to the tension ring 1 and the compression ring 2 for processing, thereby reducing the weight of the roof and the economic design. The invention is effective (the invention according to claim 2).
[0027]
[Effects of the present invention]
The roof frame of the granular material storage facility according to the first and second aspects of the present invention is not affected at all by the load of the roof within the range of the compression ring at the center (inner periphery) of the roof where the plane forms a donut shape. Since it is an open-air (blue ceiling) structure, the facilities required for the storage facility can be economically constructed within the range with a small cross-sectional structure advantageous in load-bearing design.
[0028]
On the other hand, a donut-shaped roof constructed between the tension ring on the outer periphery and the compression ring on the inner periphery, the outer pillar is rationally supported by the tension ring and the inner pillar is supported by the compression ring. The vertical stress and horizontal stress (thrust force) acting on the tension ring on the outer periphery and the compression ring on the inner periphery can be reduced to a fraction of that of a simple dome-shaped roof. As a result, the cross-section of the roof member can be reduced and the weight can be reduced, thereby enabling economic design.
[0029]
In the plan view, a plurality of granular piles are positioned on the radiation that passes through the adjacent contact portion, and the main roof joint material is constructed with an intermediate column at the inner position of the tension ring and the outer position of the compression ring, respectively. Since they are supported by these intermediate pillars, outer pillars and inner pillars, the load burden of each pillar can be dispersed and reduced. In addition, it is possible to integrally connect each column base (footing foundation) between the intermediate column and the outer column or the inner column by a foundation beam, so that the thrust force can be dispersed. Since it is constructed at a position where the loaded load of the stored granular material does not act, it can be constructed with a small cross-sectional structure accordingly.
[0030]
The circumferential interval between the main roof joints is continuous with the brace structure roof surface, and the rigidity of the brace structure roof surface, which is low in rigidity due to the main roof joint material, is effective and reasonably effective. It is possible to economically design the roof, and to reduce the horizontal force (thrust force) that acts on the supporting pile near the tunnel (tunnel) that is equipped with a payout conveyor under the floor. It is possible to provide a roof frame for a granular material storage facility having a configuration in which the number of the particles can be reduced and interference with a payout conveyor or the like can be avoided.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating the principle of a roof frame according to the present invention.
FIG. 2 is a cross-sectional view of a roof frame.
FIG. 3 is a plan view mainly showing the arrangement of column bases.
FIG. 4 is a plan view showing a relationship between a pile of granular material to be stored and a roof frame.
FIG. 5 is a skeleton diagram showing a roof frame.
FIG. 6 is a perspective view of a roof frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tension ring 2 Compression ring 3 Granules storage space 4 Pile 11 and 13 Roof material P Radiation 5 and 6 Middle pillar 7 Outer pillar 8 Inner pillar 16 Main roof joint material 24 Brace structure roof surface

Claims (2)

A tension ring is disposed on the outer peripheral edge, and a compression ring is disposed on the inner peripheral edge. A portion between the tension ring and the compression ring is used as a storage space for the granular material. Forming a plurality of adjacent piles in a plan view of the mountain of the body,
The roof has a cross-sectional shape between the tension ring and the compression ring formed into a substantially similar mountain shape that is larger than the bottom width and height of the mountain of one granular material, A roof frame with a donut-shaped plane is constructed so as to cover all the piles of multiple granular materials,
When viewed in plan, the plurality of granular particles are positioned on the radiation passing through adjacent contact portions, and intermediate pillars are respectively set at the inner position of the tension ring and the outer position of the compression ring. The outer pillar built in the position of the tension ring and the inner pillar built in the position of the compression ring and the intermediate pillar are connected by the foundation beam, and the main roof is connected to each of the intermediate pillar, the outer pillar, and the inner pillar. A roof structure of a granular material storage facility, characterized in that a palm material is supported. When viewed from above, a plurality of granular particles are arranged at a position on the radiation passing through the adjacent contact points, and the main joint members supported by the intermediate column, the outer column, and the inner column are in the circumferential direction. The roof frame of the granular material storage facility according to claim 1, wherein the interval portion is configured to be continuous by a brace structure roof surface.

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