JPH10175739A - Silo uniform stacking-up method and silo uniform stacking-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically stack up bulk material uniformly in height and efficiently when the bulk material is stacked up in a silo. SOLUTION: In this silo stacking-up device, a stacking conveyor 15 connected with an ground unloading conveyor 11, and a ceiling running stacking machine 18, are provided at the upper part of a silo, the ground unloading conveyor 11 is provided with a conveyor weighing equipment 12 detecting the carrying load of bulk material, and concurrently a stacking control device 13 is provided, which controls every stacking point the volume of the bulk material stacked up by the ceiling running stacking machine 18 based on a plurality of stacking points set in advance, the volume of the bulk material required to be stacked up at the respective stacking points, and the carrying load measured by the conveyor weighing equipment 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silo uniform loading method and a silo uniform loading device for storing loose materials such as coal and raw ore in a silo in a power plant, a cement plant, a manufacturing plant, and the like.

[0002]

2. Description of the Related Art Bulk materials such as coal carried by ships are temporarily stored in silos. When storing loose items in silos, the loose items are loaded into the silo by being loaded from above the silo. FIGS. 6 and 7 show the configuration of a conventional silo uniform stowage device for stowing loose objects into silos. FIG. 7 is a sectional view taken along the line AA ′ in FIG.

[0003] 10 is an unloader on the quay, 11 is a ground unloading conveyor, 14 is a steeply unloading conveyor, 20 is a building for storing loose goods provided at the nearest position of the unloader 10, and 22 is a wall 21 inside the building 20. A plurality of silos formed in a grid pattern are provided on the ceiling of the building 20, a loading conveyor 15 reciprocally movable above a central portion of each silo 22, and 18 is trip-engaged with the loading conveyor 15. An overhead traveling stowage machine including a traveling section 16 for traveling and a forked bulk load chute 17 for feeding bulk materials into the silo, 19 is a payout conveyor provided through the lower portion of each silo 22, and 23 is The loose objects stacked in the silo 22, 70 is a level meter for detecting the height of the two loose objects provided on the lower opening wall of the loose object input chute 17, 71 is automatically With a stowage controller for performing.

[0004] The loading of loose objects in the silo is performed by monitoring the height of the loose objects 23 in the silo by the level meter 70 while throwing loose objects from the overhead traveling loader 18 in units of each silo 22. Each time the object 23 reaches a certain height, the stowage controller 71 moves the overhead traveling stowage machine 18 by a certain distance, and repeats the same bulk material stowage operation to keep the bulk material in the silo at a uniform height. Stowed.

[0005]

However, in the case of loose objects such as coal, limestone and iron ore, the shape of the mountain changes due to the collapse of the loose objects after moving the overhead traveling loader. Alternatively, due to measurement errors of the level meter caused by dust or the like generated at the time of loading, it has been difficult to load the loose objects accurately and uniformly at a uniform height in the silo.

SUMMARY OF THE INVENTION An object of the present invention is to provide a silo uniform stowage method and a silo uniform stowage apparatus capable of efficiently stacking loose objects in a silo at a uniform height under automatic control. .

[0007]

Means for Solving the Problems A silo uniform stowage method and a silo uniform stowage apparatus according to the present invention are configured as follows to solve the above-mentioned problems. (1) According to the method for uniformly loading silos of the present invention, when storing bulk materials such as coal and ore in a large-sized silo, the silos are stacked at a plurality of positions and a plurality of heights in the running direction of the overhead traveling stowage machine. Calculate and set the required stowage volume at each point and each stowage point, and measure and control the stowage loading amount of the loose items with a conveyor weigher, automatically move the overhead traveling stowage machine to each stowage point in sequence, It is characterized in that stowage control is performed so that the height of stowage of loose objects in the silo is made uniform. (2) The silo uniform stowage device of the present invention includes a stowage conveyor connected to a ground unloading conveyor and an overhead traveling stowage machine at an upper part of the silo, and a conveyor weighing device for detecting the load of transporting loose items on the ground unloading conveyor. With, a plurality of pre-set loading points in the silo and the required loading volume of the bulk material at each loading point and the transport load measured by the conveyor weighing device for each loading point based on the A stowage controller is provided for controlling the stowage amount of loose objects by the overhead traveling stowage machine.

The stowage controller includes a setting unit to which a plurality of stowage points, a required stowage volume (planned stowage amount) for each stowage point, and a specific gravity of loose objects are input, and a stowage step order. A travel time calculating unit for determining a travel time of the overhead traveling loader between the loading points, and a unit time per unit time based on a measured value measured by the conveyor weighing device and a set value input to the setting unit. Unit time stowage amount to calculate stowage amount and required stowage time
A stowage required time calculation unit and a stowage position / time count and control instruction unit that counts the stowage time and controls the overhead traveling stowage machine are provided.

The uniform stowage method and uniform stowage apparatus of the present invention have the following operations and effects by the above configuration. Based on the load per unit length of the conveyor of loose objects on the unloading conveyor detected by the conveyor weigher, the specific gravity of the set loose objects, and the required stowage volume at each stowage point, the stowage controller Calculate the required loading time at each loading point by the overhead traveling loader, count the bulk load time and the traveling time of the overhead traveling loader, and calculate the loading amount and overhead traveling under remote automatic control. By controlling the amount of movement of the loader,
Bubbles can be stowed at a uniform height in the silo without wasting time.

By setting the loading point roughly or densely according to the flowability of the bulk material to be handled, the bulk material can be loaded at a uniform height in the silo. For example, when the liquidity of loose objects is low, the stowage points are set densely and the stowage amount at each stowage point is set small, so that the bulk of loose objects is hardly disintegrated. Objects can be stowed at a uniform height. In addition, when the liquidity is high, the bulk of the loose material collapses during the stowage, so the stowage points are coarse, and the stowage amount at each stowage point is set to be large, so that the liquidity is high. Bulk items can be stowed at a uniform height. In addition, when the stowage point of the loose objects near the uppermost layer is set finely, the height of the pile of the loose objects at the adjacent stowage points approaches, so that the height of the loose objects can be evenly stowed.

Therefore, it is possible to eliminate the occurrence of defective loading due to a measurement error of the conventionally used level meter, a height change due to the flow of the loaded bulk material, or a time difference between the measurement and the control. With a simple device configuration that is not used, uniform high-precision and efficient automatic loading to silos can be performed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the configuration of a silo uniform stowage apparatus according to an embodiment of the present invention. Above the unloader 10 for unloading bulk materials such as coal and ore from a ship, a ground unloading conveyor 11 for transporting bulk materials is installed. A conveyor weigher 12 for measuring the weight of loose objects on the conveyor 11 is installed on the ground unloading conveyor 11. The output of the measurement signal from the conveyor scale 12 is connected to the stowage controller 13. A steep unloading conveyor 14 that conveys the bulk goods transported by the ground unloading conveyor 11 to near the ceiling of the building 20 is provided.

In the building 20, a plurality of silos 22 formed in a grid pattern by walls 21 are arranged, and loose objects 23 are stored in each silo 22. On the ceiling of the building 20, a loading conveyor 15 for transporting the bulk materials conveyed to the vicinity of the ceiling of the building 20 by the steep unloading conveyor 14 to the respective silos 22 is installed. And
An overhead traveling loader 18 including a traveling unit 16 that travels while trip-engaging with the loading conveyor 15 and a bulk loading chute 17 that loads bulk materials into the silo 22 is provided. The overhead traveling stowage machine 18 is automatically driven by a control signal from the stowage controller 13. At the lower part of the building 20, a payout conveyor penetrating under each silo 22 is installed.

In general, in the transport of bulk goods using a conveyor, there is a case where a conveyor measuring device is provided for the purpose of transporting the bulk materials by the conveyor in a fixed amount, so that the existing conveyor measuring machine can be used as it is.

FIG. 2 is a block diagram showing the configuration of the stowage controller 13. The stowage controller 13 includes a setting unit 30 for setting a plurality of stowage points, a stowage amount for each stowage point, and a specific gravity of loose objects, and a stowage point in the stowage step order from the set stowage points. A moving time calculating unit 31 for calculating a moving time between the units, a unit time stowage amount and a necessary stowing time calculating unit 32 for calculating a stowage amount per hour and a required stowage time based on a measurement signal from the conveyor weighing device. And a stowage position / time count and control instructing unit 33 for counting the stowage time and controlling the traveling unit 16 of the overhead traveling stowage machine. The controller 13 adds the loading time at each loading point of the overhead traveling loader and the traveling time to the next loading point to make the loading amount at each loading point coincide with the planned loading amount. Control as follows.

Next, the operation of the present apparatus will be described with reference to the control flow of FIG. First, a plurality of loading points having data on the moving direction and the height direction of the overhead traveling loader 18 in the silo are set. The loading point is set roughly or densely in the silo according to the level of liquidity of the bulk material to be handled, and is updated when the type of bulk material to be handled changes. The stowage controller 13 calculates the set stowage point, the planned stowage capacity calculated in the stowage step order, and the specific stowage value of the bulk object to be handled or the stowage amount calculated based on the specific gravity value. It is input to the setting unit 30 and stored. (Procedure S1).

FIG. 4 shows each stowage calculated in advance for input to the setting unit of the stowage controller based on the data of the set stowage point and the measured specific gravity of the bulk object to be handled. It is a chart which shows the planned stowage amount for every step. In this table, the “planned stowage volume for each step (m ³ )” column and the “stowed weight (T
ON) and the specific gravity value column, the planned stowage amount for each stowage step is shown. In addition, the “Conveyor scale load measurement value” column and the “required stow time” column are blank. When the unit load on the conveyor is measured by the conveyor weighing unit, the unit time stowage amount of the stowage controller
The required loading time is calculated by the required loading time calculation unit, and the measured load value and the calculated required loading time are displayed.
A record is made.

Next, the travel time between the loading points of the overhead traveling loader 18 is determined by the travel time calculator 31 of the loading controller 13 based on the input set values (step S2). Then, the unloading of the loose items is started by the unloader 10, and the loading operation is started (step S3). When unloading is started and the bulk goods are conveyed by the ground unloading conveyor 11, the conveyor unloading conveyor 1 is moved by the conveyor weighing machine 12.
The unit load of the loose object on 1 is measured, and the measured value is transmitted to the unit time stowage amount / stowage required time calculation unit 32 of the stowage controller 13 (step S4). Stowage and required stowage calculation unit 3
2 calculates the stowage amount per unit time and the required stowage time based on the measured value and the set value input to the setting unit (step S).
5). Then, while the overhead traveling stowage machine 18 is stopped at the first stowage point, the bulk goods are thrown into the silo by the bulk stocking chute 17 (step S6). In the case of the first stowage point, the stowage controller 1 is set at the same time as the start of dispensing of bulk goods.
The counting of the stowage time is started by the stowage position / time counting and control instruction unit 33 of No. 3.

After the required stowage time has elapsed, it is confirmed whether or not the next stowage point exists (step S7). When the next loading point exists, the loading position / time counting and control instruction unit 33 controls the traveling unit of the overhead traveling loading machine to control the overhead traveling loading machine 18.
Is moved to the next stowage point, and at the same time as the movement control, the count of the stowage time is reset to count the stowage time for the next stowage point step (step S8). And
The overhead traveling stowage machine 18 automatically stops at the next stowage point position, performs the operations in steps S4 to S6, and stows. Then, the stowage position / time counting and control instructing unit 33 completes the stowage at the stowage point after the necessary stowage time including the moving time of the overhead traveling stowage machine 18 between the stowage points has elapsed. . Steps S8 and S4 are repeated until loose items are stowed at all stow points.
Steps S6 and S7 are performed automatically. If there is no next stowage point in step S7, the stowage operation in the silo that has been stowed is stopped (step S9).

FIG. 5 shows the state of the loose objects in the silos stacked by the above-mentioned stacking operation. FIG. 5A is a cross-sectional view taken along the line AA ′ of FIG. 1, and FIG.
FIG. 5C is a cross-sectional view taken along the line X ′, and FIG.
It is sectional drawing of a part. Incidentally, a ₁ ~a ₄ in FIG. 5, b ₁ ~
_{b 4, c 1 ~c 4,} d 1 ~d 4, e 1 ~e 4, f 1 ~f
₈ is a step number indicating the stowage point set in the silo 22 in the stowage step order. Each stowage point is set at the vertex position of the chevron line, and the area surrounded by the chevron line indicates the stowage amount required at each stowpoint. The slope of the chevron becomes steeper when the flowability of the bulk material to be handled is low, and the slope of the chevron becomes gentle when the flowability is high. Further, h _{1 to} h ₆ are set heights between the bottom surface of the silo 22 and the stowage point, and the stowage points are six steps (a to f) in the height direction and in the moving direction of the overhead traveling stowage machine. The lower five rows (a to e) have 4 locations each, and the uppermost row (e) has 8 locations, for a total of 28
It has been set in several places.

According to the silo uniform stowage method and the silo uniform stowage apparatus of the present invention, it is not necessary to use a level meter as in the prior art, and the measurement error of the level meter due to disturbance,
Changes in the loading height due to the flow of loose items after the loading machine has moved,
Due to the time difference between the measurement of the level meter and the controller, etc., the stowage amount of the silo does not become uneven, and the stowage in the silo is evenly distributed using a conveyor weighing device that is generally used for other purposes. And it can be performed efficiently. The present invention is not limited to the above embodiment, and can be implemented in various modifications without departing from the spirit of the present invention.

[0022]

As described above, according to the silo uniform stowage method and the silo uniform stowage apparatus of the present embodiment, the load of the bulk object having the unit length of the conveyor measured by the conveyor weighing device and the target object set are set. Calculation of the required loading time at each loading point by the overhead traveling loader from the specific gravity of the object and the required loading volume at each loading point, counting of the loading time and traveling time of the overhead traveling loader, and By controlling the loading amount and the moving amount of the loading machine under the automatic history control, the loading controller controls
Stowage can be carried out at a uniform height in the silo without loss of time.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a silo stowage apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a stowage controller in the silo stowage apparatus of FIG.

FIG. 3 is a control flow chart showing a procedure for loading a silo according to the present invention.

FIG. 4 is a diagram showing a calculation example of a planned stowage amount for each stowage point.

FIG. 5 is a diagram showing an outline of a stowage point.

FIG. 6 is a sectional view (1) showing the configuration of a conventional silo stowage apparatus.

FIG. 7 is a cross-sectional view (2) showing the configuration of a conventional silo stowage apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Unloader 11 Above-ground unloading conveyor 12 Conveyor weighing machine 13 Loading controller 14 Steep unloading conveyor 15 Loading conveyor 16 Traveling device 17 Bulk for loading bulk goods 18 Ceiling traveling loading machine 19 Discharge conveyor 20 Building 21 Wall 22 Silo 23 Bulk object 30 Setting unit 31 Moving time calculation unit 32 Unit time stowage amount / storage required time calculation unit 33 Stowage position / time count and control instruction unit

Claims (2)

[Claims] In order to store bulk materials such as coal and ore in a large silo, it is necessary to store stowage points at a plurality of positions and a plurality of heights in the running direction of the overhead running stowage machine in the silo and at each stowage point. The loading volume is calculated and set, and the loading quantity of the bulk goods is measured and controlled by the conveyor weigher, the overhead traveling loading machine is automatically moved to each loading point in sequence, and the bulk loading height in the silo is A silo uniform stowage method, characterized in that stowage control is performed so as to make the height uniform. 2. A loading conveyor and an overhead traveling loading machine connected to a ground unloading conveyor at the upper part of the silo, wherein the ground unloading conveyor is provided with a conveyor weighing device for detecting a bulk load of the bulk material. A plurality of loading points in the silo and a bulk load at each loading point based on a required loading volume of the bulk material at each loading point and a transport load measured by the conveyor weighing machine. A silo uniform stowage device, comprising a stowage controller for controlling the stowage amount of a silo.