KR20010010809A - Apparatus for detecting defect of tripper in reclaimer - Google Patents

Abstract

PURPOSE: A trouble detector is provided to detect the trouble of a tripper in a reclaimer by detecting the load current limit of a driving motor and a winding motor and by comparing all kinds of signals from the reclaimer. CONSTITUTION: A trouble detector consists of an analog input unit(100), a digital input unit(200), a set deciding unit(400), a comparison deciding unit, a delay unit(600), an output unit(700) and a power unit(800). The set deciding unit decides if the load current of a driving motor and a winding motor is more than a reference level. The comparison deciding unit compares the result of the set deciding unit with a reclaimer control value from the digital input unit. The output unit outputs normal and abnormal signals at the right and the left and the cutting state signal of a reel cable on a cable branch point as a reference. Thus, the trouble detector detects the trouble of a tripper and prevents the reel cable from being cut.

Description

Tripper abnormality detection device of reclaimer {APPARATUS FOR DETECTING DEFECT OF TRIPPER IN RECLAIMER}

The present invention relates to a reclaimer installed in various industrial facilities and moving raw materials to a conveying conveyor while moving along a track. More specifically, the present invention relates to a reclaimer that automatically operates in accordance with a control signal and a power transmitted by a cable. The present invention relates to a reclaimer tripper abnormality detection device capable of preventing an accident in advance by detecting a tripper abnormal state of a reclaimer to be reversed.

In general, a reclaimer as shown in FIG. 1 for transferring raw materials in various industrial facilities is used. The reclaimer 1 as shown in FIG. 1 is formed on a predetermined track by a reclaimer drive motor 2. While moving forward and backward, the raw material pile is loaded into the transfer conveyor.

At this time, the reclaimer receives a driving power or a control signal through the reel cable 5 connected to the control panel 8, and in order to efficiently manage the reel cable connected to the moving reclaimer, the reclaimer drum ( 3) and control the winding motor (4) according to the forward and backward of the reclaimer (1) so that the reel cable (5) does not interfere with the reclaimer (1) movement by winding or unwinding the cable. .

In addition, since the reel cable 5 is connected to the reclaimer 1 through a distributor 7 installed at a predetermined position (center) on the track on which the reclaimer moves, the reel cable 5 is on the left side of the distributor 7. When the right side, the operation of the winding motor 4 is reversed.

That is, when the reclaimer 1 is located on the left side with respect to the distributor 7, when it moves in the reverse direction (left side in the drawing), the winding motor 4 is wound while the winding drum 3 slips in the stationary state. The cable 5 wound on the drum 3 is released while maintaining a constant tension. On the contrary, when the reclaimer 1 moves forward in the above state, the winding motor 4 is driven to wind the winding drum 3 in the winding direction. The reel cable 5 is wound around the moving speed of the reclaimer 1.

In addition, when the reclaimer 1 is located on the right side with respect to the distributor 7, when the reclaimer 1 moves forward, the winding motor 4 winds up while the winding drum 3 slips in a stationary state. When the reel cable 5 wound on the drum 3 is released with a constant tension, and the reclaimer 1 reverses, the winding motor 4 is driven so that the winding drum 3 corresponds to the moving speed of the reclaimer. At a speed, the reel cable 5 is wound around the winding drum 3.

Thus, the control of the winding motor 3 is reversed on the basis of the distributor 7, which is the winding direction switching operation of switching along the left / right sides of the distributor 7 installed in the reclaimer 1. It is controlled by the limit 6.

Therefore, when the winding direction switching limit 6 malfunctions and the winding direction is detected in the opposite direction, the control of the winding motor 3 is reversed, which causes the reel cable 5 to be broken, resulting in a stop of the equipment, and the reclaim. The power transmission of the merging motor (2) and the winding motor (4) is made by a coupling and a chain, which are mechanical devices. If the power transmission is not performed properly due to an abnormality in the power transmission device, only the motor is driven and Since the clay is stopped and the motor drive signal is transmitted to the driver, it is difficult to notice such a failure, and when such a long time passes, the cargo overflows from the bin and causes a large accident.

The present invention has been invented in view of the above-described conventional problems, and an object thereof is to detect a limit from the load currents of the drive motor and the take-up motor of the reclaimer, and collect and compare various control signals collected from the reclaimer. By providing a tripper abnormality detection device of the reclaimer by accurately detecting the abnormal state of the reclaimer to inform the driver.

Another object of the present invention is to detect an abnormal operation of the reclaimer early to notify the driver of the reclaimer abnormal operation detection device that can improve the facility operation rate by preventing the reel cable cut or equipment accident in advance To provide.

1 is a schematic block diagram showing the configuration of a general mobile equipment.

2 is a block diagram showing a tripper abnormality detection device of the reclaimer according to the present invention.

Figure 3 is a circuit diagram showing an embodiment of a tripper abnormality detection device of the reclaimer according to the present invention.

4 is an operation timing diagram of the reclaimer tripper abnormality detection apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: analog input unit 200: digital input unit

300: filter 400: setting discriminating unit

500: comparison unit 600: delay unit

700: output unit 900: power supply

As a construction means for achieving the object of the present invention described above, the present invention is connected to the control panel and the reel cable to operate under the control of the control panel to drive the winding motor and the reclaimer forward and backward of the reel cable winding In the reclaimer tripper abnormality detection device provided with a motor,

First detecting means for detecting a load motor load current of a winding drum for winding the drive motor and the reel cable of the reclaimer;

Second detecting means for detecting a reclaimer control signal from the control panel;

The reclaimer abnormally operates by comparing the state of the reclaimer drive motor load current detected by the first detecting means and the load current of the take-up motor according to the control signal of the reclaimer detected by the second detecting means. Comparative determination means for determining whether

It characterized in that it comprises an output means for displaying whether or not the reclaimer according to the determination result of the comparison determination means.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

2 is a block diagram schematically illustrating a tripper abnormality detection apparatus of a reclaimer according to the present invention, and includes an analog input unit 100 for detecting a load current of a driving motor of a reclaimer and a load current of a winding motor. In addition, the digital input unit 200 for detecting the digital control value generated during the operation control of the reclaimer and the reclaimer driving motor load current and the winding motor load current detected from the analog input unit 100 have a reference level (no load). Set discrimination unit 400 for determining whether or not an error is detected and outputting the comparison result value, control values of the reclaimer input from the digital input unit 200, and driving of the reclaimer from the setting discrimination unit 400 A comparison determination unit 500 which determines whether the reclaimer is abnormal by comparing the state values of the motor and the winding motor, a delay unit 600 which delays the output value of the comparison determination unit 500 by a predetermined time, and the delay unit. 600 The output unit 700 outputs the result of determining whether the reclaimer is outputted as a normal / abnormal signal on the right side, a normal / abnormal signal on the left side, and a short circuit status display signal of the reel cable based on the cable branch point. And a power supply unit 800 for supplying power to each device.

3 is a detailed circuit diagram of an embodiment for explaining in detail the operation of the tripper abnormality detection device of the reclaimer shown in FIG.

As shown in FIG. 3, the analog input unit 100 detects current from the current sensors CT1 and CT2 and the current sensors CT1 and CT2 that detect currents of the reclaimer driving motor and the winding motor, respectively. The rectified diodes D1 to D6 and D7 to D12 rectify the analog current signal to a DC signal, and the DC current rectified by the rectifier diodes D1 to D6 and D7 to D12 is converted into a voltage signal in a predetermined range. Circuits R1 to R3, C1, Z1, C2 and VR1, and R11 to R13, C4, Z4 and VR4.

Then, the digital input unit 200 is a signal indicating the control state of the reclaimer, that is, the forward signal of the magnet conductor of the reclaimer drive motor, the left selection signal of the winding direction switching limit, the magnet conductor of the reclaimer drive motor A plurality of resistors (R21 to R38) for detecting the reverse signal, the right side selection signal of the winding direction switching limit, the reclaimer forward control signal, and the reclaimer reverse control signal, respectively, indicating whether the control signals are generated or not. Light emitting diodes L3 to L8 and photocouplers IS03 to IS08 that operate when the signal is generated.

In addition, the filter unit 300 may include operational amplifiers OP1 and OP2, resistors R54 to R57, and capacitors that filter voltages corresponding to the load currents of the driving motor and the winding motor output from the analog input unit 100. C24, C26).

In addition, the setting discrimination unit 400 includes zener diodes Z2 and Z5 and resistors R5 and variable resistors VR3 and VR5 for setting reference values to determine abnormal load states of the drive motor and the winding motor. When a voltage of a predetermined level or more is output from the comparators OP2 and OP4 for comparing whether the output voltage of the filter unit 300 is greater than the reference voltage set by the variable resistors VR3 and VR5. Light-emitting diodes L1 and L2 and photocouplers IS01 and IS02 which operate when the zener diodes Z3 and Z6 and the zener diodes Z3 and Z6 are turned on to indicate abnormal load states of the drive motor and the winding motor, respectively. )

In addition, the comparison determiner 500 may logic an output signal of the digital input unit 200 and an output signal of the setting determination unit 400 to determine whether an abnormality is generated from control signals of the reclaimer and a motor load state. Operating according to the output signals of the logic circuits N1 to N4, A1 to A5, O1, O2, U14 to U18 to be combined and the photocouplers IS07 and IS08 operated by the reclaimer forward and backward signals. It consists of switching circuits RY1 and RY2 which open / short the outputs of the or gates O1 and O2.

The delay unit 600 is configured to delay the output signal of the comparison determination unit 500 by a predetermined time, and output signals of the on delay timers TI1 to TI3 and the comparison determination unit. It consists of logic circuits U11 to U13 and A6 to A8 for logically combining the output signal of the unit 500.

The output unit 700 includes switching transistors TR1 to TR3 connected to the three output terminals of the delay unit 600, and a light emitting diode connected in series to a power supply terminal through the switching transistors TR1 to TR3. L9 to L11, reverse current prevention diodes D13 to D15, and relays RX1 to RX3.

As described above, the operation of the apparatus for detecting abnormal operation of the reclaimer according to the present invention will be described with reference to an embodiment of the present invention shown in FIG.

As shown in FIG. 3, the diodes D1 to D12 of the analog input unit A1 form a three-phase full-wave rectifier circuit to detect the load current AC and the winding motor of the driving motor detected from the current sensors CT1 and CT2. The load current AC is changed to a DC voltage, and the zener diodes Z1 and Z4 connected to the output terminal are provided in the filter unit 300 at the rear stage when the AC detection current is applied to the output terminal so that the set voltage is not applied to the output terminal. Application of overvoltage to the operational amplifiers OP1 and OP2 is suppressed.

The variable resistors VR1 and VR2 connected in parallel to the zener diodes Z1 and Z4 set reference values of voltages corresponding to the detected load current of the reclaimer drive motor and the load current of the winding motor, respectively. This signal is differentially amplified by the operational amplifiers OP1 and OP2 of the filter unit 300 compared with the variable resistors VR2 and VR5.

That is, when the drive motor 2 and / or the winding motor 4 of the reclaimer 1 starts driving by the control signal of the control panel 8 applied in response to the driver's operation, The phase analog current is converted and detected by the analog input unit 10 and the filter unit 300 into a voltage signal having a corresponding level.

The detection signal output from the filter unit 300 is compared with reference signals set by the variable resistors VR3 and VR5 by the comparators OP2 and OP4 of the setting discrimination unit 400. When the detection result of the comparison of the comparators OP2 and OP4 is larger than the reference signal, a high level signal corresponding to the difference is output. This is because the zener diodes ZD1 and ZD2 are turned on, and then the light emitting diodes L1 and L2 and the photo are turned on. Operate the couplers IS01 and IS02. Accordingly, when the light emitting diodes L1 and L2 are turned on, the driver may know that the reclaimer driving motor and / or the winding motor are in operation. In addition, the signal output from the operated photocouplers IS01 and IS02 is input to the comparison determination unit 500.

When the control signal of the reclaimer is generated, the light emitting diodes L3 to L8 of the digital input unit 200 light up, and the photocouplers IS03 to IS08 operate to output a high level signal.

The comparison determination unit 500 compares the signals output from the digital input unit 200 and the setting determination unit 400 to determine whether the reclaimer is abnormal. For the subsequent operation, refer to the timing diagram shown in FIG. 4. Will be explained.

First, a case in which the reclaimer 1 is located on the left side of the distributor 7 and the winding motor 4 is operated to wind the reel cable at the time of advancing will be described.

In this case, as shown in Fig. 4A, the winding direction switching limit transmitted from the reclaimer 1 to the control panel 8 selects the left side, and the reclaimer magnet conductor (advanced) After the forward control signal is applied from the control panel of the reclaimer, the drive motor and the take-up motor of the reclaimer operate accordingly, and the load current of the reclaimer should be higher than a predetermined level.

The advance condition on the left side of the distributor is checked at the first NAND gate N1 of the comparison determination unit 500. The first NAND gate N1 is a photocoupler ISO3, IS04 of the digital input unit 200. ), The left selection signal of the reclaimer magnet conductor (forward) state and the winding direction switching limit applied from the load, and the load current state signal of the reclaimer motor and the winding motor applied from the setting discriminator 400 Logically combines the values obtained by inverting (B) with natgates (U14, U15). Therefore, the magnet conductor (advanced) of the reclaimer motor is turned on from the first NAND gate N1 and there is a left selection signal of the winding direction switching limit, and the reclaimer motor current is not a normal load or is wound up. High signal is outputted when the load current of the motor is not normal. In addition, the output of the first NAND gate N1 is logically multiplied by the reclaimer advance control signal applied from the photocoupler IS07 of the digital input unit 200 by the first and gate A1, thereby providing the first NAND gate N1. The AND gate A1 outputs a high signal when a high signal is output from the first NAND gate N1 while the reclaimer forward control signal is applied, that is, when a signal indicating that the splitter left advance condition is not applied is output. Judging from the forward side of the distributor, the operation is abnormal.

As described above, when the reclaimer is positioned on the left side with respect to the distributor 7, the rewinding operation 6 causes the winding direction switching limit 6 to select the left selection signal, or the magnet conductor (reverse) is turned on. Although the reclaimer motor to be operated does not operate normally, the load current has fallen below a predetermined level, or the winding motor which should be stopped is operated so that the load current flows and the second NAND gate of the comparison determination unit 500 The N2 detects and outputs the high level signal, and the second and gate A2 detects abnormal operation and outputs the high level signal.

In addition, when the reclaimer 1 is located on the right side of the distributor 7, the rewinder limit switch selects the right side and the reclaimer magnet conductor (reverse) is turned on as shown in FIG. 4C during the reverse operation. When the reclaimer motor and the winding motor to be operated are not operated, the load current falls below a predetermined level, or the reverse condition of the right side of the distributor is not established, such as the reclaimer magnet conductor (reverse) is not turned on. Is detected by the third NAND gate N3 and outputs a high level signal, and the third AND gate A3 multiplies the output signal of the third NAND gate N3 by the backward control signal of the reclaimer. When the reclaimer reverse command is executed, it detects that the normal reverse condition is not established at the right side of the distributor and outputs it as a high level signal.

Finally, when the reclaimer 1 is located on the right side of the distributor 7, the abnormal operation state during the forward operation, that is, the winding direction switching limit selects the right side, and the reclaimer magnet contactor (forwarding) When the reclaimer drive motor to be operated does not operate and the load current falls below a predetermined level, or the winding motor which should not operate is operated so that the load current is above a predetermined level or the reclaimer magnet conductor The fourth NAND gate N4 detects that (advanced) is not turned on and outputs the high level signal, and the fourth AND gate logically multiplies the output signal of the fourth NAND gate N4 by the reclaimer advance control signal. (A4) detects that the reclaimer forward command has been applied, but the forwarding on the right side of the distributor is not normally performed, and outputs it as a high level signal.

When the first or gate O1 outputs a high level signal to any one of the first and second gates A1 and A2, the reclaimer operation at the distributor left side is abnormal. Outputs a high level signal, and when the second or gate O2 outputs a high level signal to any one of the third and fourth gates A3 and A4, the reclaimer at the distributor right side. A high level signal indicating that there is an error in the operation of the mouse is output.

The output signal of the first or gate O1 is turned on by the second relay RY2 of the comparison determination unit 500 operated when the right selection signal of the winding direction switching limit is not applied. It is transmitted to the delay unit 600 through RY2-a, and the output signal of the second orifice O2 operates when the left selection signal of the winding direction switching limit is not applied. It is transmitted to the delay unit 600 through the contact A (RY1-a) turned on by one relay RY1.

In addition, when the fifth and gate A5 outputs a high level signal to any one of the first and fourth NAND gates N1 to N4, the fifth and gate A5 outputs a high level signal indicating that there is a risk of short circuit in the reel cable. Output

The output signals of the first and second or gates O1 and O2 and the fifth and gate A5 of the comparison determination unit 500 are applied to the three timers TI1 to TI3 of the delay unit 600, respectively. The delayed time (t seconds) is output, and the delayed signal and the outputs of the first and second or gates O1 and O2 and the fifth and gate A5 are again multiplied by the AND gates A6 to A8 and compared. When the abnormality detection signal (abnormality at the distributor left side, abnormality at the distributor right side, reel cable shorting risk) of the determination unit 500 continues for a predetermined time, the signal is transmitted to the output unit 700.

When an abnormal signal (high level signal) is applied through the delay unit 600, the output unit 700 turns on the corresponding transistors TR1 to TR3 to excite the corresponding relays RX1 to RX3. The contact b of the relays RX1 to RX3 excited is turned on, and the tripper core abnormal signal S1 at the left side of the distributor through the contact b, respectively, and the tripper core at the right side of the distributor. The abnormal signal S2 and the reel cable short circuit danger signal S3 are output.

According to the present invention as described above, if an abnormality occurs in the drive motor of the reclaimer and the power transmission machine of the take-up motor, when the tripper of the reclaimer does not operate normally or the malfunction of the winding direction switching limit causes When the winding control is reversed, by detecting this in advance, it is possible to prevent the breakage of the reel cable or the expansion of the equipment accident, thereby improving productivity and reducing maintenance costs.

Claims (5)

In the tripper abnormality detection device of the reclaimer having a drive motor for connecting the control panel and the reel cable and operating under the control of the control panel, the winding motor of the reel cable and the drive motor to advance back and forth, First detecting means for detecting a load motor load current of a winding drum for winding the drive motor and the reel cable of the reclaimer; Second detecting means for detecting a reclaimer control signal from the control panel; The reclaimer abnormally operates by comparing the state of the reclaimer drive motor load current detected by the first detecting means and the load current of the take-up motor according to the control signal of the reclaimer detected by the second detecting means. Comparative determination means for determining whether And an output means for displaying whether or not the reclaimer is abnormal according to a result of the determination of the comparison determining means. The method of claim 1, wherein the first detection means First and second detection sensors for detecting load current of each of the reclaimer driving motor and the winding motor; An analog input unit for converting AC currents detected by the first and second detection sensors into DC voltages, respectively; A filter unit for filtering a voltage signal corresponding to the load current of the reclaimer driving motor and the winding motor output from the analog input unit; The reclaimer tripper comprises a setting discriminating unit for comparing whether the voltage signal corresponding to the load current of the reclaimer driving motor and the winding motor input through the filter unit is greater than the reference voltage corresponding to no load. Error detection device. The method of claim 1, wherein the second detection means The magnet condenser (forward) on signal of the reclaimer motor appearing on the control panel of the reclaimer, the left selection signal of the winding direction switching limit, the magnet condenser (reverse) on signal of the reclaimer motor, And a rightward selection signal of the winding direction switching limit, a forward control signal of the reclaimer, and a backward control signal of the reclaimer. The method of any one of claims 1 to 3, wherein the comparison determination means A first NAND gate that outputs a high signal if the load current of the reclaimer motor or the winding motor is less than or equal to a predetermined value when the magnet capacitor (forward) is turned on or the winding direction switching limit is selected to the left; A second NAND gate that outputs a high signal when the load current of the reclaimer motor is below a predetermined value or the load current of the winding motor is more than a predetermined value when (reverse) is turned on or the winding direction switching limit is selected to the left; A third NAND gate that outputs a high signal when the load current of the reclaimer drive motor and the take-up motor is less than a predetermined value when the NECT condenser (reverse) is turned on or the winding direction switching limit selects the right side, High) if the load current of the reclaimer drive motor is lower than the predetermined value or the load current of the drive motor is higher than the predetermined value when the forward direction) is turned on or the winding direction switching limit is selected. A fourth NAND gate that outputs a signal; a first NAND gate that outputs a high signal when the first NAND gate outputs a high signal; and a second NAND gate outputs a high signal when the reclaimer forward signal is detected; A second and gate that outputs a high signal when a crawler reverse signal is detected, a third and gate that outputs a high signal when the third NAND gate outputs a high signal and a high signal when the reclaimer reverse signal is detected, and a fourth NAND A fourth end gate outputting a high signal when the gate outputs a high signal and a reclaimer advance signal is detected, and a high-risk short circuit signal of the reel cable when both of the first to fourth NAND gates output a high signal. A fifth and gate for outputting a signal; a first or gate for outputting a high signal as an abnormal signal at the left side of the distributor when any one of the first and second NAND gates is output; The first or gate outputting the high signal as the abnormal signal at the distributor right side when any one of the output signals is output, and the output signal of the first or gate when the right signal of the winding direction switching limit is not applied. And a first switching means for outputting and a second switching means for outputting an output signal of the second or gate when the left signal of the winding direction switching limit is not applied. Device. According to claim 1, wherein the tripper abnormality detection device of the reclaimer A reclaimer tree further comprising a delay means for applying to the output unit when the reclaimer abnormality determination signal of the comparison determination means continues to be output after a predetermined time delay between the comparison determination means and the output means. Fur abnormality detection device.