KR100403468B1 - Torque measuring apparatus for coke pusher machine - Google Patents

Abstract

The present invention is a monitoring means for managing the thermal history and furnace wall condition (carbon attachment state) of each carbonization chamber by coke oven, by constantly measuring the information related to the extruder ram extrusion force to quantitatively record and manage the problems in the coke oven The present invention relates to an extruder torque measuring device, which is a key component of a non-contact extruder extrusion force measuring device for prolonging the life of a furnace by minimizing the mechanical load on the furnace structure and the structure of the furnace at an early stage of development. The present invention comprises an extruder torque measuring device as a rotor and a stator that detects the torsional force of the shaft by attaching a strain gauge as a torque measuring sensor to the extruder shaft, and expresses it as a torque, but also changes the direction of the ram or vibration A plurality of roller bearings are mounted on the rotor so that the former and the stator maintain a constant distance, and the stator is positioned thereon, and the circuit components are modularized for easy maintenance.

Description

Torque measuring apparatus for coke pusher machine

The present invention relates to an extruder torque measuring device, which is a key component of a non-contact extruder extrusion force measuring device, and more particularly, a rotor that detects a torsional force of a shaft by attaching a strain gauge to a extruder shaft, and represents the torque. Comprising the stator torque measuring device as a stator, but a plurality of roller bearings are mounted on the rotor so that the rotor and the stator maintain a constant distance even if the extruder ram changes direction or vibration, and the circuit components by function to facilitate maintenance The present invention relates to a modular extruder torque measuring device.

The extruder extrusion force measuring device is a monitoring means for managing the thermal history of each carbonization chamber and the furnace wall state (carbon attachment state) with coke as coke by constantly measuring and quantitatively recording and managing information related to the extruder ram extrusion force. It is used to improve the life of the furnace by minimizing the mechanical load on the furnace structure and the structure of the furnace in the early stage of problem in the oven.

1 is a block diagram of a conventional extruder extruded force measuring apparatus, referring to this, the conventional extruder extruded force measuring apparatus is to reduce the rotation by the flow motor (1) in the reducer (2), the reduced rotational force is The pinion gear 3a formed at the end of the extruder shaft and the rack gear 3b formed at the extruder ram 5 are transmitted to the extruder ram 5 in a linear force so that the extruder ram 5 extrudes the coke. The extrusion force measurement of the extruder at has been performed by measuring the highest value of the primary current value of the induction motor 1 driving the extruder ram 5.

Similarly, Japanese Patent Laid-Open Publication No. 10-219256, Carbon Attachment Detection Method for Coke Furnace Carbonization Chamber, Japanese Patent Application Laid-Open Publication No. 8-151580, Control Method for Extrusion to Coke Furnace, Japanese Patent Application Laid-Open Publication Hei 8-225787, Problems in Coking Furnace Carbonization Chamber Circumstance Determination Apparatus and Method "," Japanese Laid-Open Patent Publication No. 8-53676, Method of Determination of Damage to the Wall of Coke Furnace "," Japanese Laid-open Patent Publication Hei 1-247483, Monitoring Method of Force During Coke Furnace Extrusion "," Japanese Laid-Open Patent Publication 63-68690, " The method for determining abnormality of the coke oven carbide wall surface "," Japanese Patent Laid-Open No. 8-295888, the coke extrusion control method ", etc. also manage the highest value of the primary current value of the extruder ram drive motor by the extrusion force.

By the way, managing the highest value of the primary electric current value of an extruder ram drive motor by extrusion force has a problem in the following points.

First, the current of the induction motor is not proportional to the generated torque of the motor because the power factor is not constant. Thus, the measured current may show a tendency of the extrusion force but does not accurately represent the extrusion force.

Second, the position where the maximum value of the current occurs is the time zone during which the motor is accelerating, and the torque generated by the motor includes an acceleration torque for accelerating the device. This makes accurate extrusion force measurement difficult.

Third, the ram drive motor driving method of the extruder is controlled by the overcurrent brake to soften the impact during starting, and the torque generated from the motor includes the braking torque due to the overcurrent brake because the braking section and the maximum current value overlap. It is difficult to accurately measure the extrusion force.

On the other hand, in addition to the current value, there is a method of obtaining the extrusion force by using a load measuring device of the motor, but this method has problems in durability and maintenance of the load measuring device, and thus cannot be used for a long time.

In order to solve this problem there is a "extruder extrusion force measuring apparatus using a non-contact measuring method" of the Republic of Korea Patent Application No. 97-15204 proposed by the present invention, in the overall configuration shown in Figure 2 Induction motor 1, speed reducer 2 for reducing the rotation ratio of the induction motor 1, pinion gear 3a formed on the extruder shaft end, and rack gear 3b formed on the extruder ram 5; And an extruder ram 5 linearly moving by the pinion / rack gears 3a and 3b, the extrusion force measuring device being installed on the extruder shaft 4 to sense the extruder force of the extruder. Torque measuring device 100, which is provided to the high frequency receiver 200 through a high frequency transmission and a high frequency reception process internally, and amplifying and filtering the received signal from the torque measuring device 100, and again frequency down and voltage signal High frequency receiver 200 which converts the signal into an analog signal and converts it into an analog signal and provides it to the control device 300, and stores in advance information on the loading density, the loading amount, and the normal extrusion force of the extruder. Receives a voltage signal from the (200) is converted to the D / A and converted into an extrusion force and stored, and at the same time the control device 300 for controlling to output the converted extrusion force information on the screen.

3A and 3B are perspective and partial cutaway perspective views showing a detailed structure of the torque measuring device shown in FIG. 2. Referring to FIGS. 3A and 3B, the torque measuring device 100 is fixed to the extruder shaft 4. The rotor 110, the stator 150 fixed to the outer case by a predetermined distance to the outer circumferential surface of the rotor 110, and fixed to the shaft 4 by a rubber band or the like to torque the shaft 4 Torque measuring sensor 120 for sensing, and attached to the rotor 110, the high-frequency transmitter 130 for amplifying the sensed signal from the torque measuring sensor 120 to convert into a high frequency signal, and the rotor A transmission antenna 140 attached to the 110 to wirelessly transmit a high frequency signal from the high frequency transmitter 130, and a reception antenna 160 attached to the stator 150 to capture the wirelessly transmitted signal It consists of.

The signal is induced from the transmitting antenna 140 to the receiving antenna 160, the rotor 110 is rotated with the rotation of the shaft 4 when the shaft 4 is rotated, the stator 150 ) Is fixed to the outer case of the torque measuring device 100 is configured so that the stator 150 is always fixed even when the rotor 110 is rotated, and the outer case to which the stator 150 is fixed The shaft 4 is installed to be fixed at all times without the influence of the rotation.

The torque measuring device of the above configuration accurately measures the extrusion force by using the strain gauge as a torque measuring sensor without using a current, but the torque measuring device is affected by vibration and dust of the extruder itself. There is a problem with durability.

In addition, when a circuit component of the torque measuring device has a problem, such as a failure, there is a problem in that it is not easy to find a location where the problem occurs, so that the entire circuit component must be replaced.

The present invention for solving the above-mentioned problems is to configure the extruder torque measuring device as a rotor and a stator to detect the torsional force of the shaft by attaching a strain gauge to the extruder shaft to represent the torque, the direction of the extruder ram or vibration Edo is equipped with a plurality of roller bearings on the rotor so that the rotor and the stator to maintain a constant interval to position the stator thereon, to provide an extruder torque measuring device configured by dividing the circuit components into a plurality of modules for easy maintenance Its purpose is to.

1 is a block diagram of a conventional extruder extrusion force measuring device

2 is an overall configuration diagram of an extruder extrusion force measuring apparatus using a conventional non-contact measuring method

3 is a perspective view and a partially cutaway perspective view showing a specific structure of the torque measuring device of FIG.

Figure 4 is a perspective view of the extruder torque measuring device of the present invention

5 is a module configuration diagram of a modular extruder torque measuring device according to an embodiment of the present invention

6 is a circuit block diagram for converting and transmitting a torque measuring sensor signal;

Explanation of symbols on the main parts of the drawings

1: induction motor 2: reducer

3a, 3b: pinion / rack gear 4: axle

5: extruder ram 6: indicator

7: pulse generator 100: torque measuring device

110: rotor 111, 112: rotor front / back plate

113: rotor coupling portion 114: steel band

115: circular space bar 116: roller bearing

120: torque measuring sensor 130: high frequency transmitter

140: transmission antenna 150: stator

151: stator coupling portion 152: stator base

160: reception antenna 170: circuit module

172: temperature sensor signal amplification module 174: power supply module

176: signal coupling module

180a, 180b: Torque measuring sensor signal processing module 1, 2

181: amplifier / filter section 181a: offset adjustment resistor

181b: gain adjustment resistor 183: A / D converter

200: high frequency receiver 300: control device

The present invention for achieving the above object is fixed to the extruder shaft temperature sensor to provide the temperature information necessary to properly compensate the detection signal of the torque measuring sensor according to the ambient temperature, and fixed to the extruder shaft torsional force of the extruder shaft Torque measuring sensor for detecting a; and a rotor is fixed to the extruder shaft and the gear wheel for ram pushing distance encoder is formed on the outer circumferential surface, and the stator fixed to the outer case at a predetermined distance to the outer peripheral surface of the rotor, the rotor A circuit component which is formed to be attached to the temperature sensor and torque measurement sensor and the rotor to process the encoded signal, a transmission antenna which is formed to be attached to the rotor circumference and transmits radio frequency signals wirelessly, and is attached to the stator. A reception antenna for capturing the wirelessly transmitted signal and a signal captured at the reception antenna In the extruder torque measuring device comprising a high frequency receiver for converting and outputting a signal,

A plurality of roller bearings are attached to the rotor to maintain a constant distance from the rotor even when the stator rotates or vibrates the extruder ram, and the stator is installed on the roller bearing.

Another aspect of the present invention is a circuit component of the torque measuring device attached to the rotor means for amplifying the output signal of the temperature sensor, amplifying and filtering the output signal of the torque side sensor, and then output by A / D conversion Means for transmitting, means for combining the output signals of the means and transmitting them through a transmission antenna, and means for supplying power to the means, wherein the means comprise a separate module for easy maintenance. have.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Figure 4 is a cutaway perspective view of the extruder torque measuring apparatus of the present invention.

In the same figure, the rotor is largely divided into two parts for the convenience of the front plate 111 and the back plate 112 are installed by the rotor coupling portion 113, the coupling force of the rotor back plate 112 A steel band 114 for augmenting it, a plurality of circular space bars 115 supporting the steel band, and being attached to one side of the back plate 112 facing the rotor front plate 111. It consists of a plurality of roller bearings 116 to form a predetermined space between the 110 and the stator 120, and a circuit module 170 attached to the rotor front plate 111, the circuit module 170 The components of) are connected through the rotor front plate 111 forming a multilayer printed circuit board.

In addition, the stator 150 mounted on the roller bearing 116 is divided into two parts like the rotor, and is coupled by the stator coupling part 151 and attached to the base 152.

As shown in the drawing, a plurality of (eg, eight) special roller bearings 116 are mounted on the rotor back plate 112 and the stator 150 is mounted thereon to change the direction of the extruder ram 5. The stator 150 is moved together with the roller bearing 116 even in the case of vibration or vibration, so that the space is kept constant between the rotor 110 and the stator 150 so that the stator 150 is not affected by the movement even in severe axial play or vibration. Do not

As a result, the rotor 110 and the stator are rotated by the vibration after the direction of the shaft in which the direction of the rotor 110 attached to the rotating shaft is distorted by the bearing tolerance when the direction of the extruder ram 5 is changed (forward and backward). It is possible to prevent the signal transmission from being blocked by the 150 contact.

5 is a configuration diagram of a circuit module in the modular extruder torque measuring apparatus according to an embodiment of the present invention, by dividing the circuit component by function to produce a plurality of modules, poor working environment, such as dust, high temperature and vibration It is housed in a sturdy enclosure so it is not affected by severe conditions.

As shown in the figure, the circuit module 170 includes a temperature sensor signal amplification module 172, a power module 174, a signal coupling module 176, a torque measurement sensor signal processing module 1 (180a) and a torque measurement sensor signal processing module 2 It consists of 180b.

The temperature sensor signal amplification module 172 amplifies and outputs a signal of a temperature sensor that senses a temperature around an axis on which the torque measurement sensor is attached. This temperature signal is used by the control device 300 to appropriately correct the detection signal of the torque measuring sensor according to the ambient temperature.

The torque measuring sensor signal processing module 1 (180a) amplifies and filters the signal detected by the torque measuring sensor that senses the torsional force of the extruder shaft, and then performs A / D conversion, and then performs the processing necessary for high frequency transmission.

The torque measurement sensor signal processing module 2 (180b) is for backup in preparation for the failure of the torque measurement sensor signal processing module 1 (180a), and may be provided with an appropriate number as necessary.

The signal combination module 176 combines the signals output from the temperature sensor signal amplification module 172 and the torque measurement sensor signal processing modules 1 and 2 (180a, 180b) to convert them into high frequency signals and transmits them through the transmission antenna 140. do.

The power module 174 supplies power required for the operation of all the modules.

The modules are interconnected through a rotor front plate 111 that forms a multilayer printed circuit board.

By modularizing the circuit components according to the functions as described above, it is easy to find an abnormality or a failure point of the circuit. In addition, if a problem occurs in a circuit component, only a corresponding module needs to be replaced without having to replace the whole, thereby reducing maintenance costs.

6 is a circuit block diagram for converting and transmitting a torque measuring sensor signal.

Here, the torque measuring sensor 120 is composed of a sensor for sensing the forward torque and a sensor for sensing the reverse torque, it is preferable that a pair is provided in each direction.

In addition, the torque measuring sensor signal processing module (180a, 180b) comprises an amplification / filter unit 181 for amplifying and filtering the sensed signal from the torque measuring sensor 120, and a sample holder, multiplexer, encoder and the amplification / An A / D converter 183 converts the output signal of the filter unit 181 into a digital signal.

The amplifying / filtering unit 181 includes a plurality of amplifying / filtering units for amplifying and filtering sensing signals from the sensors included in the torque measuring sensor 120, respectively, and the amplifying / filtering unit An offset adjusting resistor 181a and a gain adjusting resistor 181b for adjusting the noise influence and the amplitude of the amplifier are provided.

In addition, the signal combination module 176 combines the output signal of the A / D converter 183 and the output signal of the temperature sensor signal amplification module 172, converts it into a high frequency signal and outputs it to the transmission antenna 140. The power supply module 174 including the power supply unit 174a for supplying power and the power stabilization circuit 174b for maintaining the supplied power at a constant level has all other torque measuring device circuit components including the torque measurement sensor signal processing module. Power on.

The operation according to the torque measuring device of the present invention configured as described above will be described. Referring to FIG. 2, when the extruder extrusion force device operates the induction motor 1 to drive the extruder ram 5, the rotation ratio of the induction motor 1 is decelerated at a constant rate in the reducer 2. The rotational force of the reducer 2 rotates the pinion gear 3a through the shaft 4, and the rotational movement of the pinion gear 3a is converted into a linear motion by the rack gear 3b while the extruder ram 5 Cokes are extruded by performing left and right weaving.

At this time, the torque of the extruder shaft 4 is measured by the torque measuring device 100 and provided to the high frequency receiver 200 through a wireless transmission and reception process.

First, when the torque measuring sensor 120 of the torque measuring device 100 installed on the extruder shaft 4 detects the torque of the shaft 4 and provides the torque measuring sensor signal processing modules 1 and 2 (180a and 180b). The sensed signal of the torque measuring sensor 120 is amplified and filtered to a predetermined size by the amplification / filter unit 181 and then converted into a digital signal by the A / D converter 183. The digital signal is combined with the output signal of the temperature sensor signal amplification module 172 in the signal combination module 176 and converted into a high frequency signal, and then wirelessly transmitted through the transmission antenna 140 attached to the rotor 110.

Meanwhile, the high frequency signal wirelessly transmitted from the transmitting antenna 140 of the rotor 110 is captured by the receiving antenna 160 of the stator 150 and then input to the high frequency receiver 200. The input signal is amplified to a predetermined size while passing through the amplifying / filtering unit and the high frequency receiving processing unit D / A converting unit of the high frequency receiver 200 (not shown), and then passed through a valid band. After the conversion process is converted into an analog signal is provided to the control device 300.

Although not shown, the control device 300 includes a computer, a storage device, a monitor, and a printer. The computer installed in the cab calculates the extrusion force by using the temperature sensor signal, the torque sensor signal, etc. of the high frequency receiver 200 to be input, and then outputs it to the monitor together with the relevant information, and the result data through the printer if necessary can see. The extruded force-related information that is continuously generated is stored in an external data storage device to make it available when needed. The extruding force obtained in this way is measured at every extrusion of the coke oven, and the data is used to indirectly determine the condition of the oven and determine the coke quality.

Extruder torque measuring device of the present invention as described above is a rotor attached to the rotating shaft by the bearing tolerance when the direction of the extruder ram (by forward and backward) by mounting a plurality of roller bearings on the rotor and positioning the stator thereon It is possible to prevent the signal transmission is blocked by the rotor and the stator contact by the vibration after the direction of the axis is turned to the wrong direction.

In addition, by modularizing the circuit components of the torque measuring device for each function, it is easy to find an abnormality or a failure point of the circuit, and in case of a problem, it is possible to reduce maintenance costs by replacing only the corresponding module without having to replace the whole.

Claims (3)

A temperature sensor fixed to the extruder shaft 4 to provide temperature information necessary to properly compensate the detection signal of the torque measuring sensor 120 according to the ambient temperature, and fixed to the extruder shaft 4 to the extruder shaft 4. Torque measuring sensor 120 for detecting the torsional force of the rotor, the rotor 110 is fixed to the extruder shaft (4) is formed on the outer circumferential surface of the rampus distance encoder and the outer circumferential surface of the rotor (110) A stator 150 fixed to the outer case at a predetermined interval and attached to the rotor 110 to process and transmit signals of the temperature sensor and the torque measurement sensor 120 to the signal; A transmission antenna 140 attached to the rotor 110 to wirelessly transmit a high frequency signal, a reception antenna 160 attached to the stator 150 to capture the wirelessly transmitted signal, and at the reception antenna Captured signal to analog signal In the extruder torque measuring device comprising a high frequency receiver 200 to convert the output to The rotor 110 is made of a front / rear plate (111, 112), the front and rear so that the rotor 110 and the stator 150 maintains a constant interval even in the direction or vibration of the extruder ram 50 Extruder torque measuring device, characterized in that the plurality of roller bearings (116) is attached to the back plate (111, 112), the stator 150 is installed on the roller bearing (116). The method of claim 1, The circuit module 170 includes a temperature sensor signal amplification module 172 for amplifying the output signal of the temperature sensor; A torque measurement sensor signal processing module 1 (180a) for amplifying and filtering the signal sensed by the torque measurement sensor 120, and then performing A / D conversion and processing required for high frequency transmission; The signal combination module 176 and the module which combine the signals output from the temperature sensor signal amplification module 172 and the torque measurement sensor signal processing module 1 180a to convert them into high frequency signals and transmit them through the transmission antenna 140. And a power supply module (174) for supplying power required for the operation of the apparatus, wherein the modules are interconnected through a rotor (110) forming a multilayer printed circuit board. The method of claim 2, Torque measuring sensor signal processing module 1 (180a) for the failure of the backup torque measuring sensor signal processing module 2 (180b) for the failure of the extruder torque measuring apparatus characterized in that it further comprises.