JPS6236227A - Device for loading raw material in raw material yard - Google Patents

Abstract

PURPOSE:To accurately grasp the quantity of stocking while eliminating the need for incorporating a load cell by calibrating the integrated value of a sending side belt ware based on the integrated value of a cut-out belt ware at every operating unit. CONSTITUTION:The quantity of stocking of raw material is defined as the sum total of the quantity of raw material on a conveyor from any of sending side belts 42A-42C to a surge hopper 12, and one in the surge hopper 12. When the conveying operation on the sending side has attained the quantity of a bedding plan and as the corresponding upper-course side conveyors 40A-40C are stopped or carry out idle feeding, the conveying operation on the sending side is considered to be completed, and the then quantity of stocking DELTAW is operated. Also, at the same time, the present position and advancing direction of a stacker 18 are detected by a stacker detector 22, and information on them is inputted into a terminal control operating device 52. The operating device 52 operates the cut-out quantity Y of a constant quantity cut-out deice 10 with which loading operation is completed when the stacker 18 has reached either of turning points 48, 50, based on the quantity of stocking DELTAW.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a raw material stacking device in a raw material yard, and in particular, raw materials of various brands are relayed by a surge hopper equipped with a quantitative cutting device, and then stacked in layers using a stacker that moves back and forth within a predetermined range. The present invention relates to an improvement of a raw material loading device in a raw material yard that is equipped with a material loading device.

[Conventional technology]

The loading work at the raw material yard is performed to stack and blend raw materials of various brands into hundreds of layers in order to supply raw materials of desired quality to the sintering factory. Conventionally, in this loading work, as shown in Fig. 2, the brands to be loaded are first determined, the raw materials are transported from the source using a claimer, and then relayed to the surge hopper 12 equipped with a quantitative cutting device 10f. A motor 16 driven by a controller 14 cuts out a certain number of legs and sends them to a stacker 18, where they are stacked in layers with a constant thickness, turned back at a predetermined turning point, and stacked in many layers. It is done in such a way that it is attached. To complete the loading work, first, the unloading work at the source is completed,
When this is detected, the inventory amount at that time will be changed to surge hopper 1.
The stacker 18 is detected by a load cell 20 attached to the stacker 18, and the stacker detector 22 detects the position and running direction of the stacker 18.
The operation amount of the controller 14 of the quantitative cutting device 10 is adjusted to the terminal control calculator 24 so that loading can be completed at either A or 18B.
The calculations and corrections are made so that the stowage work is completed at either end of the bed 26. In addition, in FIG. 2, reference numeral 28 indicates the presence of 1i1! in the surge hopper 12 based on the signal from the load cell 20. 3o indicates a process computer in which the stock quantity computing unit 28 or the terminal control computing unit 24 is stored, and 32 checks the cutout amount from the surge hopper 12. 1, and shows cut-out belt wear for outputting to the controller 14.

Problems to be Solved by the Invention] However, in order to perform the raw material loading work using the above-mentioned position a, the surge hopper 12 of the device must be equipped with a load cell 20 for detecting the amount of inventory therein. Although it is essential, installing the load cell 20 on the surge hopper 12 requires high equipment costs, and if the load cell 20 is not installed in the existing surge hopper 12, it is very expensive to modify the surge hopper 12 and install the load cell 20. The problem is that it is difficult. In addition, although the load cell 20 can maintain high accuracy in detecting the amount of waste, if the accuracy of the quantitative cutting amount is poor, the bed 26
At either end of the bed, the remaining mackerel cannot be brought to zero, and the mackerel is piled up before the end of the bed or after turning, and the quality of the piled material is impaired due to faults in the layer of raw materials, resulting in burnout. There is also the problem that the quality of the resulting product deteriorates. In order to avoid this problem, if loading is completed at any turnaround point before 1i'[I becomes zero, the remaining raw material will have a negative effect on the loading of the next brand, and the patterning will also be affected. Quality deteriorates. [Object of the Invention] The present invention has been made in view of the conventional problems as described above, and it is possible to accurately grasp the current position while eliminating the need to incorporate a load cell that requires high equipment costs or modification costs. The object of the present invention is to provide a raw material loading device in a raw material yard that can reliably finish the loading work when the stacker reaches the turnaround point based on the inventory amount. [Means for Solving the Problems] The present invention is designed to relay raw materials of various brands using a surge hopper equipped with a quantitative cutting device, and then stack them in layers using a stacker that moves back and forth within a predetermined range. In the raw material loading device in the raw material yard, the feeder beltware is provided on the upstream conveyor of the surge hopper to determine the amount of raw material supplied to the surge hopper, and the downstream conveyor of the quantitative cutting device of the surge hopper is provided. and an inventory amount calculator for determining the difference between the integrated values of the beltware to be cut out and the beltware to be cut out to the stacker, and the beltware to be cut out to the stacker; Based on the inventory amount determined in , the stacker cuts out the quantity from the quantitative cutting device such that the stacking ends at one of the predetermined turning points until the stacking work is finished. The above object is achieved by including a termination control calculator that performs calculations and corrections at appropriate intervals. In the above configuration, a preferred embodiment is that the integrated value of the source belt wear is calibrated for each work unit based on the integrated value of the cut belt wear. This makes it possible to calibrate the characteristics (or qualitative variations) of the source beltware based on the information on the cut-out beltwear that is thought to yield more accurate detection values, further reducing inventory. can be determined accurately. [Function] In the present invention, the feed source belt ware is provided on the upstream conveyor of the surge hopper, and the cutting belt ware is provided on the downstream conveyor of the quantitative cutting device of the surge hopper. Since the current jII is calculated based on the difference in integrated values, the expensive load cell of the surge hopper can be omitted. In addition, based on the determined amount of itt, the stacker calculates and calculates the cutout amount from the quantitative cutout device at appropriate intervals until the stacking operation is completed so that the stacker finishes stacking at one of the turning points. Since the correction is made, it is possible to accurately control the end point of the stowage, and therefore it is possible to maintain good stowage quality with no difference.

【Example】

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 1 shows an embodiment of a raw material loading device in a raw material yard according to the present invention. In this embodiment, raw materials of various brands are relayed by a surge hopper 12 equipped with a quantitative cutting device 10, and then stacked in layers using a stacker 18 that moves back and forth within a predetermined range. In the loading equipment,
Upstream conveyors 40A to 40G of the surge hopper 12
feeding source beltware 42A to 42C for determining the amount of raw material supplied to the surge hopper 12, and a downstream conveyor 4 of the quantitative cutting device Wi10 of the surge hopper 12.
4, and is provided in the cut-out belt wear 32 for determining the cut-out amount to the stacker 18, and the inventory amount for determining the difference between the cumulative values of the feed source belt wear 42A to 42C and the cut-out belt wear 32. Based on the calculation unit 46 and the inventory amount calculated by the inventory calculation unit 46, the stacker 1
8 calculates and calculates the amount of cutout from the quantitative cutter 10 such that the stowage ends at either of the predetermined turning points 48 or 50 at appropriate intervals until the stowage work is completed.
A termination control calculator 52 for correction is provided. The cut-out belt wear 32 and the source belt wear 4
2A to 42C are conventionally well-known devices, and are attached to the roller part of the conveyor, convert the loaded weight of the conveyor into an electric signal, output it continuously, and calculate the integrated value to control the raw material on the conveyor. This is to find the amount of passage. Reference numerals 54A to 54C refer to the source belt wear 42A.
This is a counter that integrates the outputs from 42C and 42C, respectively. Further, reference numerals 56A to 56G indicate the counters 54A to 54.
This is a corrected counter in which the value of G is calibrated in relation to the cut-out belt wear 32 and then stored. code 5
Reference numeral 8 denotes a selector for selecting any one of the corrected counters 56A to 56C of the series in operation and outputting the selected one to the inventory tolerance calculation unit 46. Also, is the code 60 the same as above? ? A cutting amount setter 62 receives the output from the sub-control calculator 2 and sets the cutting amount, and a setting Ii! is used to calculate the setting value of the controller 14 from the cutting amount. ! The computing unit 64 is a square counter for calculating the integrated value of the cut belt wear 32. Next, the effect will be explained. In Figure 1, once the brand of raw material to be loaded is determined,
The system from which the raw material is sent is determined to be one of the upstream conveyors 40A to 40G of the surge hopper 12. As a result of this determination, one of the upstream conveyors 40A to 40G starts operating, and the raw material of the predetermined brand is transferred to the surge hopper 12.
charged inside. When the raw material in the surge hopper 12 reaches a certain value or more and loading becomes possible, the motor 16 is driven and the quantitative cutting device f10 starts operating. With this start of operation,
The setting value X (ton
/h) The transportation of raw materials is started. On the other hand, the stacker 18 is stopped at the time when the operation of the quantitative cutting device @10 is started.Usually, when loading a new brand, the stacker 18 is moved to the turning point 48.
．． 50, and when loading a certain brand is temporarily interrupted for some reason, it stops at the position where the previous work was interrupted. When the quantitative cutting device 10 starts operating, the surge hopper 12
When the raw material inside starts to be cut out, the downstream conveyor 44
When the raw material cut out by the quantitative cutting device f10 arrives at the stacker 18, a load detector (not shown) attached to the stacker 18 detects the arrival of the raw material,
The stacker 18 starts running. If an out-of-load occurs for some reason during the loading operation by the running of the stacker 18, the abnormality is detected by the load detector attached to the stacker 18, and the stacker 18 is moved and the quantitative cutting device 10, Then, the operation of the conveyor 44 on the downstream side from the quantitative cutting device 10 is stopped all at once, and the operation is started after the trouble has been dealt with. In this way, the loading work begins,
Interruptions, restarts, etc. are repeated, and the stacking work is sequentially performed as the stacker 18 is moved back and forth. During the loading work, the amount of cutout from the quantitative cutout device 10 is measured by the cutout belt wear 32, and this measured amount of cutout is input to the controller 14, and the amount of cutout is inputted to the above-mentioned X (ton/h). controlled. Therefore, on the bed 26, the thickness of one layer is
(ton/h) and is uniformly stacked in many layers. Further, at the same time, the total amount Wo cut out from the fixed quantity cutout station a 10 is accumulated in the counter 64 in the process computer 3o. On the other hand, the feed amount from the feed source is the feed amount from the feed source belt wear 42.
The feed amount is measured by any one of A to 42G, is input into the process computer 30, and the total feed amount is accumulated by one of the counters 54A to 54C. By the way, the amount of raw material supplied measured by the source belt wear 42A to 42C and the cutout amount measured by the cutout beltware 32 are numerical values that should originally correspond accurately. However, there may be subtle structural differences between the respective source belt wear 42A to 42G, or each source belt wear 42A to 42C.
Due to differences in the distance from the surge hopper 12 to the surge hopper 12, certain characteristics (qualitative variations) occur in the obtained integrated values. Therefore, in this embodiment, the integrated values of the counters 54A to 54C are calibrated for each work unit based on the integrated value of the cut belt wear 32. That is, the calibration coefficients α1 to α3 are set for each of the counters 54A to 54G.
is determined in advance, and the source belt wear 42A to 42C is
Product calculated directly by the output of! l! [l! is corrected using the corresponding calibration coefficients α1 to α3, and the corrected total value is stored in the corrected counters 56A to 56C. And a corrected counter 56A corresponding to the series in operation.
-56C is selected by the selector 58, and the total feed amount Wi is transferred to the current jjlt calculator 46. In this control, the stock amount of raw materials is transferred from any one of the source beltware 42A to 42C to the surge hopper 12.
It can be defined as the total amount on the conveyor up to and in the surge hopper 12. Therefore, the inventory amount ΔW is obtained by calculating ΔW=Wi Wo in the inventory amount calculator 46. Now, when the conveyance work at the source reaches the planned bedding amount and the corresponding upstream conveyors 40A to 40C stop or start empty conveyance, the conveyance work at the source is counted as complete, and the inventory amount ΔW at that time is Calculated. At the same time, the current position and running direction of the stacker 18 are detected by the stacker detector 22, and this information is sent to the terminal control calculator 52.
is input. In the termination control calculator 52, the stacker 18 is moved to the turning point 48.5 based on the inventory amount ΔW.
Calculate the cutting amount MY (t. h ) to Y(t
On/h) is performed at a "change point" where the boundary of the raw material due to the change exactly matches either the turning point 48 or 50. This change is determined from the equipment specifications. Specifically, in order to determine the changes, the stacker speed, the downstream conveyor 4 of the quantitative cutting device 1-0
Information regarding the length and speed of 4, the position of the stacker turning point 48, 50, the capacity of the quantitative cutting R station 10, the downstream conveyor 44, etc., and other constants is required. It is set and stored in the computing unit 52. After calculating the cut-out WkY (ton/h) by the 14-end control calculator 52 using these constants, when the stacker 18 reaches the change point, this cut-out MY (ton/h) is calculated.
/h) is output to the cut-out It 89 regulator 60 to change the cut-out amount. Basically, this cutting amount Y (ton/h) is directly set in the controller 14, and the excretory cutting device @10 is set to Y (ton/h).
The purpose can be achieved by controlling with n:/h). However, the output of the cutting belt wear 32 is normally given to the controller 4 as a continuous signal in units of ton/'h, and on the other hand as pulses in units of X10'ton (n is a positive or negative integer). Therefore, it is not uncommon for the error between the two to be about 1%, and this error may cause a shift in the loading end position of several tens of meters. Therefore, in order to finish the stacking work more accurately at the stacker turning point 48.50, precision control is performed by the counter 64, and the cutout amount Y (ton/h) is periodically corrected as follows. That is, the stacker 18 reaches the change point and the constant cutting and loading @
10 cutting amount from X (ton/h) to Y (ton
/h), the terminal control calculator 52 calculates the inventory amount ΔWi (i is X
MY i (ton/h
), and the cutting amount of the quantitative cutting device 10 is sequentially corrected/changed based on the calculation result. As a result of these controls, the boundary for changing the cutting amount and the end of the stacking operation always coincide with either the turning point 48 or 50 of the stacker 18, and the stacking layer is aligned in the longitudinal direction of the sintering bed 26. It is possible to prevent the formation of faults. [Effect of the invention 1] As explained above, according to the present invention, it is possible to eliminate load cells that require high equipment costs or modification costs from within the device, and it is possible to reduce the cost of the entire device, as well as to reduce the cost of the device as a whole. The excellent effect is that the stowage work can be completed exactly at the turning point with high precision.

[Brief explanation of the drawing]

FIG. 1 is an overall block diagram showing an embodiment of a material loading device in a material yard according to the present invention, and FIG. 2 is an overall block diagram showing an example of a conventional material loading device in a material yard. 10... quantitative cutting device, 12... surge hopper,
14... Controller, 18... Stacker, 20
... Load cell, 22 ... Stacker detector, 2
4.5, 2... End control calculator, 26... Bed, 28.46... Inventory amount calculator, 32... Cutting belt wear, 40A to 40C... Upstream conveyor, 42A ~42C
... Source belt wear, 44 ... Downstream conveyor, 48.50 ... Turning point, 54A to 54C ... Counter, 56A to 56G ... Counter after correction, 6o ... Cutting and placing Setting device, 64...Counter.

Claims (2)

[Claims] (1) In a raw material loading device in a raw material yard, raw materials of various brands are relayed through a surge hopper equipped with a quantitative cutting device, and then stacked in layers using a stacker that turns around within a predetermined range. A feeding source belt ware provided on the upstream conveyor of the surge hopper and used to determine the amount of raw material supplied to the surge hopper; and a feed source beltware provided on the downstream conveyor of the metered cutting device of the surge hopper to determine the amount cut out to the stacker. an inventory amount calculator for calculating the difference between the cumulative values of the delivery source beltware and the cut-out beltware; A terminal control calculator that calculates and corrects the amount of cutout from the quantitative cutout device such that the stacker ends the stacking at one of the predetermined turning points at appropriate intervals until the stacking operation is completed. A raw material loading device in a raw material yard, characterized by comprising: (2) A raw material loading device in a raw material yard according to claim 1, wherein the cumulative value of the source belt wear is calibrated for each work unit based on the cumulative value of the cut belt wear. .