KR100428834B1 - Reclaiming amount measuring method of reclaimer - Google Patents

Abstract

The present invention relates to a method for measuring the discharge amount of a raw material dispenser,

Measuring the amount of raw material dispensing at the time of dispensing the raw material of the raw material dispenser 10 including the running part 11, the turning part 12, the buoy part 13, the discharging part 14, and a control unit for controlling the operation thereof. In the method, the left and right distance measurement is installed on the lower left and right sides of the buoy portion 13 to measure the distance (dlx) (drx) to the raw material pile 30 from the left and right of the discharge portion 14, respectively. Left and right height measuring sensors 49a and 49b which are provided on the sensors 48a and 48b and on the left and right sides of the dispensing portion 14 and measure the height before and after discharging the raw material pile 30, respectively, and the respective measurements. Using a control system composed of a control unit for receiving and calculating the measured values of the sensors 48a, 48b, 49a and 49b, the measured values dlx of the left and right distance measuring sensors 48a and 48b ( obtaining a dispensing depth d of the raw material pile 30 as a difference of drx); Obtaining a dispensing height h of the raw material pile 30 as a difference between the measured values of the left and right height measuring sensors 49a and 49b; Using the measured values dlx and drx of the left and right distance measuring sensors 48a and 48b, the dispensing start and end angles of the turning unit 12 are recognized, and the turning angle as the absolute value of the difference value ( obtaining θ); And calculating the volume (V) of the raw material discharged at the time of turning using the dispensing depth (d), the dispensing height (h) of the raw material pile (30), and the turning angle (θ). ,

By accurately calculating the discharging amount of raw materials to be dispensed, an appropriate amount of dispensing is performed, thereby providing an effect of preventing various mechanical defects or inefficiency caused by excessive or excessive discharging amount.

Description

Method of measuring discharge amount of raw material dispenser {RECLAIMING AMOUNT MEASURING METHOD OF RECLAIMER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the discharge amount of a raw material dispenser, and more particularly, a raw material dispensed during operation of a raw material dispenser, which is a device for discharging raw materials from a raw material pile such as iron ore, sintered ore and limestone. The present invention relates to a method of measuring discharge amount so that the discharge amount of?

1 is a schematic view showing a state in which a raw material dispenser dispenses raw materials.

In an operation site such as a steel mill using a large amount of raw materials, such as iron ore, sintered ore, limestone, a raw material reclaimer (Stacker) is used to transfer the raw material piled from the raw material pile file to the desired operation site.

The raw material dispenser 10 is largely composed of four parts, such as a traveling part 11, a turning part 12, a buoy part 13, and a dispensing part 14. The driving unit 11 is located on the railway rail 15 and can travel in both forward and backward directions along the rail. The dispensing portion 14 is a portion having a bucket 14a to directly rotate the raw material while rotating, and the dispensing center 14 at this time becomes the center of rotation of the dispensing portion 14 located at the end of the buoy portion 13. .

In more detail with reference to FIG. 1, the running part 11 of the raw material dispenser travels on the rail 15 in the X-axis direction (the direction perpendicular to the ground on the drawing), and the turning part 12 is Z The axis of rotation is rotated on the traveling part 11. The buoy portion 13 performs up and down rotational movement with the buoy center point 16 as the center of rotation according to the length adjustment of the hydraulic cylinder 17. The dispensing part 14 is comprised by the bucket 14a which distributes raw material from the raw material pile 30, and vice versa.

Various controls performed in the material dispensing machine are mainly used for controlling the traveling distance in the X-axis direction, the turning control in the Z-axis direction, the control of the angle of inclination by the hydraulic cylinder 17, and the conveyor belt for conveying when the raw material is loaded or discharged. Control and bucket rotation control, etc., the control signal for this control is comprehensively processed in the central cab control PLC (not shown) connected to the raw material discharge side control PLC (not shown).

When discharging the raw material, the driver first moves the raw material dispenser 10 to the place where the raw material pile 30 is located and moves, and then rotates the discharging unit 14 in the direction in which the raw material pile 30 is located. Then, the height of the dispensing end is finely adjusted so that the dispensing portion 14 contacts the raw material pile 30 and landed at the dispensing point. Then, the bucket 14a of the dispensing part 14 is rotated, and left or right is rotated about the turning rotary shaft Z, and the raw material is dispensed while running a little.

Conventionally, in order to measure the amount of raw material dispensed by the raw material dispenser 10, a load measuring cell 21 for weighing is installed at the bottom of the buoy portion 13, and is dispensed by integrating the weight of the raw material conveyed by the conveyor belt. The amount was calculated.

However, this method has the trouble of zeroing the load cell 21 when the conveyor belt is an empty belt, the analog value measured in the load cell 21 is not precise, and the integral value also has a considerable error. There was a problem that a reliable discharge value could not be obtained. In addition, there was a problem that the volume (volume) can not be accurately calculated because the water content of each raw material shows a lot of variation.

The present invention is to solve the above problems, the amount of raw material dispenser to accurately determine the discharge amount of the raw material discharged during the operation of the raw material dispensing device, which is a device for discharging the raw material from the raw material pile file Its purpose is to provide a method.

1 is a schematic view showing a state in which a raw material dispenser dispenses raw materials;

2 is a schematic plan view for explaining a discharge amount measuring system according to the present invention;

3 is a schematic side view for explaining a discharge amount measuring system according to the present invention;

Figures 4a and 4b is a view for explaining the variable used in the discharge amount measuring method according to the present invention, Figure 4a is a schematic plan view of the raw material pile, Figure 4b is a schematic front view of the portion of the raw material pile,

Fig. 5 is a schematic plan view for explaining angle measurement at the time of turning in the discharge amount measuring method according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: raw material dispenser 11: running part

12: pivot 12a: cockpit

13: Bubu 14: Outgoing

14a: bucket 15: rail

16: Buang center point 17: Buangbu hydraulic cylinder

21: load cell 30: raw material pile

48a: left distance sensor 48b: right distance sensor

49a: left height sensor 49b: right height sensor

50: support

The present invention for achieving the above object is a raw material dispenser comprising a running portion 11, the turning portion 12, the buoy portion 13, the discharge portion 14 and a control unit for controlling their operation. In the method of measuring the amount of raw material discharging when discharging the raw material of (10), the distance (dlx) from the left and right sides of the bottom of the buoy portion 13 to the raw material pile 30 on the left and right sides of the discharging portion 14 is measured. Left and right distance measuring sensors 48a and 48b respectively measuring the drx and left and right height measurements respectively installed at the upper left and right sides of the discharge part 14 to measure the height before and after the discharge of the raw material pile 30, respectively. Using a control system composed of a sensor (49a, 49b), and a control unit for receiving and calculating the measured values of each of the measuring sensors (48a, 48b, 49a, 49b), the left and right distance measuring sensor ( Obtaining a dispensing depth d of the raw material pile 30 as a difference between the measured values dlx and drx of 48a and 48b; Obtaining the dispensing height h of the raw material pile 30 as a difference between the measured values of the left and right height measuring sensors 49a and 49b; Using the measured values dlx and drx of the left and right distance measuring sensors 48a and 48b, the dispensing start and end angles of the turning unit 12 are recognized, and the turning angle as the absolute value of the difference value ( obtaining θ); And calculating the volume V of the raw material discharged at the time of turning using the dispensing depth d, the discharging height h of the raw material pile 30, and the turning angle θ. .

In another aspect, the present invention is characterized in that it further comprises the step of calculating the weight (M) of the discharged raw material by multiplying the volume (V) of the raw material obtained as described above by the density (D) of the raw material previously measured. .

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

Figure 2 is a schematic plan view for explaining the discharge amount measuring system according to the present invention, Figure 3 is a schematic side view for explaining the discharge amount measuring system according to the present invention, Figures 4a and 4b is a discharge amount measuring method according to the present invention 4A is a schematic plan view of a raw material pile, FIG. 4B is a schematic front view of a portion to be dispensed out of a raw material pile, and FIG. 5 is a diagram illustrating a discharge amount measuring method according to the present invention. It is a schematic plan view for demonstrating angle measurement.

As described above, the ordinary raw material dispenser 10 is largely composed of four parts, such as the running part 11, the turning part 12, the buoy part 13, and the dispensing part 14.

As shown in FIG. 2, left and right distance measuring sensors 48a and 48b are respectively installed on the lower left and right sides of the lower part of the buoy portion 13, and the left and right height measuring sensors 49a on the left and right sides of the discharge part 14. 49b, and each measurement sensor 48a, 48b, 49a, 49b is connected so that the measured value can be transmitted to the control part (not shown) of the raw material dispenser 10. FIG.

The left and right distance measuring sensors 48a and 48b respectively provided on the left and right sides of the buoy portion 13 have a dispensing depth when the dispensing portion of the dispensing portion 14 dispenses the raw material (the depth in the front-rear direction in the raw material pile: d ) Is a distance measuring sensor measuring distance (dlx) (drx) measured on the left and right side to the control unit so that the dispensing depth (d), which is the difference, is obtained.

The left and right height measuring sensors 49a and 49b are installed downwards at the ends of the support 50 formed on the left and right sides of the dispensing portion 14 and extended to the dispensing end. The left and right height measuring sensors 49a and 49b. Is for measuring the height (h) of the raw material dispensed by the dispensing, and measures the height before and after dispensing, and transmits the value to the control unit so that the difference is obtained.

When the length from the pivot center point of the raw material dispenser 10 to the end of the bucket 14a is l, R2 is a radius value having a value equal to l, R1 is a radius value having a value equal to ld, and θ is It is defined as the turning angle at the time of turning.

Then, when the raw material pile 30 is viewed from above, the area A of the hatched portion in which the dispensing is made in one turn is obtained by the following equation (1).

A = (π x R2 x R2-π x R1 x R1) x (θ / 360)

Then, the volume V, which is the actual discharge amount at the time of turning one of the raw material piles 30, is multiplied by the height h of the stage to be discharged by the area A obtained above. Will be saved.

V = (π x R2 x R2-π x R1 x R1) x (θ / 360) x h

Since the weight M of the raw material discharged at the time of one turn may be multiplied by the density D of the raw material by the volume V obtained above, it is obtained by the following equation (3).

M = (π x R2 x R2-π x R1 x R1) x (θ / 360) x h x D

The density (D) of the raw material used above uses the value measured before discharging with respect to the raw material piled up as the raw material pile 30.

On the other hand, θ is the absolute value of the difference between the starting angle and the turning angle, that is, the turning angle at the time of the turning, the process of obtaining the turning angle θ with reference to FIG.

The left and right distance measuring sensors 48a and 48b attached to both the dispensing side of the buoy portion 13 are used to measure the dispensing depth d, while the turning portion 12 is provided with the raw material pile 30. It is also used to control the turning change automatically at both ends.

The swing control of the swing unit 12 may be by manual operation, but may be achieved by the controller in such a manner as to automatically change the swing without involving the operator, but the present invention uses this method.

In the case where the control is performed as described above, the turning control is performed by using a short-range sensor installed at the dispensing side of the buoy 13 to measure the distances to both raw material piles 30.

That is, when the raw material dispenser 10 is operated, dlx > drx and (dlx-drx) > 20 by comparing the distance (dlx) measured by the left near sensor and the distance (drx) measured by the right near sensor. When the condition of cm (20 cm is a value generally applied in the field and can be changed in consideration of the size of the raw material pile and the raw material dispenser), the position of the dispensing part 14 is shifted to the left. It is determined that the deviation is from (30), and in the opposite case, the deviation is to the right, and the turning direction is changed in the reverse direction.

At this time, when the raw material dispenser 10 turns to the left, dlx at the time of normal discharge has a value smaller than drx because of the depth of dispensing, but dlx when the turning continues to reach the end of the raw material file 30. Since the value is larger than drx, the controller changes the turning change at this time and measures the turning angle until the turning change in the opposite direction is made.

In the present invention, the left distance measuring sensor 48a is used as the left near field sensor, and the right distance measuring sensor 48b is used as the right near field sensor so that the turning control as described above is performed. It is possible to obtain the turning angle θ which is the absolute value of the difference value by grasping the start angle and the end angle along the direction.

Such a method for measuring the discharge amount of the raw material dispenser of the present invention accurately calculates the discharge amount and volume of the raw material to be dispensed at the time of operation of the raw material dispenser, which is a device for discharging the raw material from the raw material pile file, so that the appropriate amount is dispensed. This provides an effect of preventing the occurrence of various mechanical defects or inefficiency in operation caused by excessive or excessive discharge amount.

Claims (2)

Measuring the amount of raw material dispensing at the time of dispensing the raw material of the raw material dispenser 10 including the running part 11, the turning part 12, the buoy part 13, the discharging part 14, and a control unit for controlling the operation thereof. In the way, Left and right distance measuring sensors 48a installed on left and right sides of the lower part of the buoy portion 13 and measuring distances dlx and drx from the left and right sides of the discharge portion 14 to the raw material piles 30, respectively ( 48b), left and right height measuring sensors 49a and 49b which are installed at the left and right sides of the upper end of the discharge part 14 to measure the height before and after discharging the raw material pile 30, and the respective measuring sensors 48a ( 48b) (49a) using a control system consisting of a control unit for receiving and calculating the measured values of 49b, Obtaining a delivery depth d of the raw material pile 30 based on a difference between the measured values dlx and drx of the left and right distance measuring sensors 48a and 48b; Obtaining a dispensing height h of the raw material pile 30 as a difference between the measured values of the left and right height measuring sensors 49a and 49b; Using the measured values dlx and drx of the left and right distance measuring sensors 48a and 48b, the dispensing start and end angles of the turning unit 12 are recognized, and the turning angle as the absolute value of the difference value ( obtaining θ); Characterized in that it comprises the step of obtaining the volume (V) of the raw material discharged at the time of turning once using the dispensing depth (d), the dispensing height (h) of the raw material pile 30, the turning angle (θ) Method of measuring discharge amount of raw material dispenser. The method of claim 1, Dispensing the raw material dispenser, characterized in that it further comprises the step of multiplying the volume (V) of the discharged raw material obtained as described above by the density (D) of the raw material, and calculating the weight (M) of the discharged raw material. Volume measurement method.