KR20020052763A - Metal fragment removing apparatus on conveyor belt and its removing method - Google Patents

Abstract

PURPOSE: A device and a method for removing the iron piece transferred to a conveyor belt are provided to efficiently remove the iron piece contained in the material transferred to a conveyor belt by performing a work in the on-line state. CONSTITUTION: A device for removing the iron piece transferred to a conveyor belt comprises an iron piece sensor(10) for sensing an iron piece(2) in a material by forming a magnetic flux around a conveyor belt(1), an iron piece tracking unit(50) for tracking the position of the iron piece transferred by the conveyor belt, and an iron piece removing unit(40) for removing the iron piece by absorbing the iron piece with a magnetic force.

Description

Metal fragment removing apparatus on conveyor belt and its removing method}

The present invention relates to an iron strip removal apparatus for recognizing and removing iron strips contained in iron ore transported by a conveyor belt for raw material transport, and a method for removing the iron strips. The present invention relates to an iron removing device and a method of removing the iron when the iron is placed at a specific position.

Iron ore, the raw material for steel produced in steel mills, is transported by ship or train by sea or land. The iron ore and other raw materials thus transported are transported to the yard by conveyor belt. A typical conveyor belt includes a rubber belt rotating in a caterpillar, an idle roll located inside the belt to prevent the belt from sagging, and a roller driving the belt to rotate. Another conveyor belt is located and the iron ore transferred from one conveyor belt falls to the other conveyor belt to switch the conveying direction. This is not only the conversion of the transfer direction, but also the connection relationship of the other conveyor belt according to the conveying distance limitation of the conveyor belt.

On the other hand, iron ore is transported in the form of spectral or lump, iron ore is present in a mixture of iron ore. When these iron pieces fall from one conveyor belt to another conveyor belt, they are not processed, and the steel pieces with sharp edges damage the belt made of rubber and shorten the life of the conveyor belt. Therefore, finding and removing the iron pieces mixed in the iron ore conveyed by the conveyor belt is the most important factor to extend the life of the conveyor belt.

The iron strip removing apparatus according to the prior art includes a method using a magnetic separator or a magnetic lifter installed on the conveyor belt to remove the iron strips, and a manual operation by an operator.

The removal method by the worker's manual operation has a big problem in the safety of the worker located in the conveyor belt which operates in such a manner that the worker removes the iron pieces from the iron ore transported by being placed on the conveyor belt, and the removal speed of the iron pieces is slow.

In addition, the iron strip removal method using the magnetic separator should be the same as the anthracite coal in which the raw material to separate the iron strip is nonmagnetic material. This is because, in the case of a magnetic material containing iron, there is a problem in that even the raw material transported together with the iron pieces is removed. Such a magnetic separator is installed close to the upper surface of the conveyor belt, so that when a bulky raw material such as a bulky bulk is transported through the conveyor belt, interference between the raw material and the magnetic separator occurs. Therefore, the magnetic separator is applied only to spectroscopic materials. .

In addition, the iron strip removal method using the magnetic lifter cannot be used for raw materials having the characteristics of magnetic materials such as iron ore such as the magnetic separator, and is very expensive because the lift is installed over the entire length of the belt. It is difficult to install on the conveyor belt located about 10 meters high, and a lot of load is applied to the conveyor belt equipment to shorten the life of the conveyor belt.

In addition, in order to prevent damage to the belt, such as partial breakdown or total rupture, there is a case in which a piece of iron is installed on the conveyor belt to detect and remove the piece of iron. And the belt brake signal is transmitted to the drive motor which rotates the drive roller, and the iron piece is removed from the stopped belt according to the brake signal.

Conventional iron piece detectors do not recognize the position of the iron piece on the belt and only check the existence of the iron piece to brake the rotation of the belt. At this time, the worker climbs the belt line and manually removes the iron piece. However, when the belt is completely stopped and the iron piece is removed and the belt starts to operate again, the abrupt stop and operation of the belt put a load on the driving motor. Will drive again. Therefore, there is a disadvantage in that the amount of conveyed material is reduced at the same time, and it is not suitable for removing the iron pieces because the exact position of the iron pieces is not recognized.

The present invention is provided to solve the problems of the prior art as described above, to detect the iron piece contained in the raw material conveyed by the conveyor belt, to track the movement of the iron piece to remove the iron piece when the iron piece is located at a specific position An object of the present invention is to provide an iron strip removing device and a method of removing the iron strip.

1 is a conceptual diagram showing the entire system of the iron strip removing apparatus according to an embodiment of the present invention,

Figure 2 is a schematic diagram showing the iron detection unit of the iron strip removing apparatus shown in Figure 1,

3 is a block diagram showing a signal flow of the iron strip removing unit of the iron strip removing apparatus shown in FIG.

4 is a conceptual diagram illustrating the iron strip removing unit illustrated in FIG. 3.

♠ Explanation of symbols on the main parts of the drawing ♠

1: Conveyor Belt 2: Iron Piece

3: iron ore 10: iron piece detection unit

20: signal processor 30: controller

40: iron strip remover 47: iron core

49: female coil 50: moving distance tracking unit

70: load cell

According to the present invention for achieving the object as described above, in the iron strip removing apparatus for removing the iron pieces having a strength greater than the magnetic strength of the raw material from the magnetic or non-magnetic material conveyed along the conveyor belt, the conveyor belt Forming a magnetic flux around the iron piece detection unit for detecting the iron piece by the phenomenon of being bridged by the magnetism of the iron piece mixed in the raw material, and the iron piece detected by the iron piece detection unit of the iron piece conveyed by a conveyor belt The iron piece tracking unit for tracking the position, and is installed at a point away from the iron piece detection unit by a predetermined distance in the traveling direction of the conveyor belt and receives the moving distance of the iron piece from the iron piece tracking unit is the one point When the iron reaches the iron piece including a strip removing portion to remove by attaching the magnetic force The removal device is provided.

In addition, the iron piece detecting unit of the present invention is provided with a magnetic flux generating coil is installed on the upper portion of the conveyor belt for generating a magnetic flux, and a sensing coil is installed on the lower portion of the conveyor belt to measure the voltage that is changed by the iron piece. The iron piece tracking unit includes an encoder for generating a pulse while rotating together with the belt of the conveyor belt, and the iron piece removing unit wraps the circumference of the iron core so as to excite the iron core and the iron core positioned on the upper portion of the belt. An excitation coil, a first motor installed on the iron core to move the iron core in an up and down direction with respect to the belt, a second motor pivoting the iron core to the side of the belt, and installed on the iron core. The load cell is attached to the excited iron core and senses a changing load.

In addition, according to the present invention, in the iron strip removal method for removing the iron pieces having a strength greater than the magnetic strength of the raw material from the raw material conveyed along the conveyor belt, the step of detecting the iron pieces conveyed along the conveyor belt and Tracking the distance from the position where the iron piece is detected along the conveyor belt, and installing the iron piece removal unit for separating the iron piece from the raw material by magnetic force. If it is tracked that the iron piece is located in the position is provided a iron piece removal method for removing the iron piece from the iron piece removal unit.

In the following, with reference to the accompanying drawings, preferred embodiments of the iron strip removing device and the method for removing the iron strips to be conveyed by the conveyor belt according to the present invention will be described in detail.

In the drawings, Figure 1 is a conceptual diagram showing the entire system of the iron strip removing apparatus according to an embodiment of the present invention, Figure 2 is a schematic diagram showing the iron strip detecting unit of the iron strip removing apparatus shown in Figure 1, Figure 3 is 4 is a block diagram illustrating a signal flow of the iron strip removing unit of the illustrated iron strip removing device, and FIG. 4 is a conceptual diagram illustrating the iron strip removing unit illustrated in FIG. 3.

As shown in FIG. 1, the iron strip removing device includes an iron strip sensing unit 10 for sensing iron pieces 2 mixed with iron ore transported along the conveyor belt 1, and a predetermined range from the iron strip detecting unit 10. The iron strip removal unit 40 and the iron strip 2 detected by the iron strip detection unit 10 to remove the iron strip 2 detected by the iron strip detection unit 10 by a distance of the conveyance belt 1 are transported along the conveyor belt 1. The movement distance tracking unit 50 to track the tracking and the detection information from the iron detection unit 10 and the movement distance information from the movement distance tracking unit 50 are received and the movement distance is the iron removal unit 40. And a control unit 30 for removing the iron pieces 2 by operating the iron piece removing unit 40 when positioned at the position of.

As shown in FIG. 2, the iron piece detecting unit 10 has a magnetic flux generating coil 12 positioned in a width direction of the belt 5 on an upper portion of the conveyor belt 1, and a plurality of sensing surfaces are provided on the bottom surface of the belt 5. The coil 17 is positioned in connection with the width direction of the belt 5.

The magnetic flux generated by the magnetic flux generating coil 12 chains the sensing coil 17 located on the lower surface of the belt 5. At this time, when the iron piece 2 conveyed along the belt 5 passes the upper portion of the sensing coil 17, the voltage induced in the coils constituting the sensing coil 17 is changed, and the sensing coil 17 In FIG. 2, the changed voltage is converted into an electrical signal and input to the signal processing unit 20, and the signal processing unit 20 converts the electrical signal into a sensing signal and inputs it to the control unit 30. At this time, among the plurality of sensing coils 17 located in the width direction of the belt 5, the iron pieces 2 positioned on the belt 5 according to the position of the sensing coil 17 and the generation time of the electrical signal. ) And the length of the iron piece (2) located in the longitudinal direction of the belt (5), and the size of the iron piece (2) by the position of the sensing coil 17 and the length of the iron piece (2). It becomes possible. Here, since the magnetic strength of the iron piece 2 is greater than that of the iron ore 3, the voltage generated by linking the sensing coil 17 is different when the iron ore 3 passes and the iron piece 2 passes. .

On the other hand, the movement distance tracking unit 50 is an encoder that is rotated in accordance with the orbital rotation of the belt 5 in contact with the lower surface of the belt (5), the electrical signal input from the encoder to the signal processing unit 20 of the belt (5) As the rotation movement distance information, the signal processing unit 20 converts an electrical signal into a movement distance signal and inputs it to the controller 30. The movement distance tracking unit 50 measures the rotational movement distance of the belt 5 with an encoder from the moment when the iron piece detection unit 10 detects the iron piece 2. When the rotational movement distance of the belt 5 measured as described above is equal to the distance from the iron piece detecting unit 10 to the iron piece removing unit 40, the control unit 30 operates the iron piece removing unit 40. That is, when the iron piece 2 detected by the iron piece detecting unit 10 is transferred to the iron piece removing unit 40, the iron piece removing unit 40 operates the iron piece 2.

Meanwhile, as illustrated in FIGS. 3 and 4, the iron piece removing unit 40 removes the iron piece 2 transferred to the position of the iron piece removing unit 40 in response to a signal input from the control unit 30. The iron piece removing unit 40 receives a microprocessor 41 for receiving the position and size information of the iron piece 2 input from the control unit 30, and receives only the position information of the iron piece 2 from the microprocessor 41. A position controller 42, two drive motors 44 driven by the position controller 42, an excitation signal controller 43 which receives only the size information of the iron piece 2 from the microprocessor 41, and an excitation. The excitation signal supply source 45 controlled by the signal controller 43, the excitation signal source 45 connected to the excitation signal supply source 45 and surrounding the iron core 47, and installed on the upper portion of the iron core 47 The load cell 70 is included.

Position and size information of the iron piece 2 input from the control unit 30 to the microprocessor 41 is processed by the microprocessor 41 so that the position information is input to the position controller 42, the position controller 42 is the iron piece Two motors 44 installed on the iron core 47 are driven to remove (2) from the top of the belt 5. One motor is driven to move up and down the belt 5 of the iron core, and the other motor is driven so that the iron core 47 pivots out of the side of the belt 5 above the belt 5. do.

Meanwhile, the size information of the iron piece 2 input from the microprocessor 41 to the excitation signal controller 43 determines the excitation intensity corresponding to the information, and the excitation signal controller 43 excites the determined excitation strength information. Input to the supply source 45 to supply the appropriate power to the excitation strength of the excitation to the excitation coil 49 surrounding the core 47 is generated. Therefore, the iron core 47 is excited by the supplied electric power, and attracts the iron piece 2 located below the iron core 47.

On the other hand, the load cell 70 fixed to the upper portion of the iron core 47 detects the load changed by the iron piece 2 is attached to the iron core 47, and inputs the signal to the microprocessor 41. This signal is again rotated by the two motors 44 through the position controller 42 to cause the iron core 47 to move upwards of the belt 5 and then to the side of the belt 5 to turn the belt 5. Be placed on top of the bucket (not shown) located on the side of the. In this state, the microprocessor 41 instructs the excitation signal controller 43 to cut off the power supply, and the excitation generated in the iron core 47 is released, so that the iron piece 2 attached to the iron core 47 is bucketed. The iron piece 2 is separated from the raw material by falling down.

It will be described in detail with respect to the iron strip removal method according to the operation of the iron strip removal apparatus configured as described above.

The iron piece 2 conveyed by the conveyor belt 1 is detected by the iron piece detecting unit 10 to generate a voltage, and this voltage is input to the signal processing unit 20 and converted into sensing information. In addition, even in an encoder that generates a signal according to the rotation of the belt 5, a pulse is input to the signal processing unit 20, and the moving distance of the raw material moving along the belt 5 through the pulse input to the signal processing unit 20. Is converted into moving distance information and input to the controller 30. The control unit 30 tracks the position of the detected iron piece 2 using the detection signal and the moving distance information, and calculates the position of the iron piece 2 in the width direction of the belt 5 and the size of the iron piece 2. do. Then, when reaching the position of the iron strip removing unit 40 separated by the predetermined distance from the iron strip detecting unit 10 of the iron strip 2, the size of the iron strip 2 to the microprocessor 41 of the iron strip removing unit 40 And position information of the iron piece 2 is input.

In the microprocessor 41, the size of the iron piece 2 at the same time as operating the one of the two motors 44 to move the iron core 47 to the upper direction of the iron piece (2) using the input position information The information is used to determine the excitation intensity and to excite the iron core 47 so that the iron piece 2 is attached to the iron core 47 moving downward. As the iron piece 2 is attached to the iron core 47, the changed load is sensed from the load cell 70 installed on the upper portion of the iron core 47, and the microprocessor 41 operates a motor so that the iron core 47 moves upward. After the motor is rotated, the other motor 44 is rotated so that the iron core 47 pivots out of the belt 5. The microprocessor 41 disassembles the excitation of the iron core 47.

Therefore, the iron piece 2 which is located and moved on the upper surface of the belt 5 is removed from the raw material while falling out of the belt 5.

As described in detail above, the iron strip removing apparatus for removing the iron pieces to be conveyed to the conveyor belt of the present invention and the method of removing the iron strips to remove and detect the iron pieces conveyed along the conveyor belt for raw material transport, Since work is done online, there is an advantage that efficient work performance can be obtained.

In addition, according to the present invention, the iron core is moved to the upper and lower parts of the belt, there is an advantage that can be used regardless of whether the raw material moving along the conveyor belt in the form of bulk or powder.

In addition, according to the present invention, even if the iron ore as a raw material by using a sensing coil that is differently bridged by iron ore, there is an advantage that the iron piece can be easily removed from the iron ore.

In the above description, the technical idea of the iron strip removing device for removing the iron strips conveyed by the conveyor belt of the present invention and its removal method has been described together with the accompanying drawings, which is illustrative of the best embodiments of the present invention. It is not limited. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (3)

In the iron strip removal apparatus for removing the iron pieces having a strength greater than the magnetic strength of the raw material from the magnetic or non-magnetic raw material conveyed along the conveyor belt, An iron piece detecting unit for forming the magnetic flux around the conveyor belt and detecting the iron piece by a phenomenon of being bridged by the magnetism of the iron pieces mixed with the raw material; And iron piece tracking unit for tracking the position of the iron piece conveyed by the conveyor belt is detected by the iron piece detection unit, It is installed at a point away from the iron piece detecting unit by a predetermined distance in the direction of travel of the conveyor belt, and receives the moving distance of the iron piece from the iron piece tracking unit and attaches the iron piece by magnetic force when it reaches the point. Iron piece removal device comprising a steel strip removing unit to remove. The method of claim 1, The iron piece detecting unit includes a magnetic flux generating coil installed on the conveyor belt to generate magnetic flux, and a sensing coil installed on the lower portion of the conveyor belt to measure the voltage which is changed by the iron piece. The iron piece tracking unit has an encoder for generating a pulse while rotating with the belt of the conveyor belt, The iron strip removing unit includes an iron core positioned on an upper portion of the belt, an excitation coil surrounding the core of the iron core to excite the iron core, and an agent installed on the iron core to move the iron core in the vertical direction based on the belt. 1 a motor, a second motor for turning the iron core to the side of the belt, and a load cell mounted on the iron core and attached to the iron core with which the iron pieces are excited to detect a changing load. Removal device. In the iron strip removal method for removing the iron pieces having a strength greater than the magnetic strength of the raw material from the raw material conveyed along the conveyor belt, Detecting the iron piece being transferred along the conveyor belt; Tracking the distance traveled along the conveyor belt from the detected position of the iron piece; The iron piece is removed by the predetermined distance from the detected position and if the iron piece is located in the position where the iron piece removal unit for separating the iron piece from the raw material by magnetic force is traced to remove the iron piece from the iron piece removal unit Iron strip removal method.