A coke oven four-car slide wire monitoring method

Abstract

The present application relates to a kind of coke oven four-car slide wire monitoring method, the method comprises the following steps: step 1: design a set of slide wire monitoring device;Step 2: slide wire monitoring device in real working condition Sampling each phase slide wire temperature, current and voltage value, and record the position of these values;Step 3: by comparing the sampling values of the same phase slide wire in different positions to determine the abnormal condition of slide wire, and confirm the position of abnormality;Step 4: by comparing the sampling values of different phase slide wire to determine the abnormal condition of slide wire, and confirm the abnormal slide wire and position, the scheme can automatically analyze the real-time running state of coke oven car slide wire, early find the deterioration trend of slide wire, avoid the expansion of accident.

Description

Technical Field

[0001] This invention relates to a monitoring method, specifically a monitoring method for the sliding contact lines of the four main cars of a coke oven, belonging to the field of electrical equipment control technology. Background Technology

[0002] The four main cars of the coke oven (coke pusher, coke quencher, coal feeder, and electric locomotive) primarily draw power from a sliding contact line. This line is laid horizontally along the direction of travel, and each phase's current collector on the car makes physical contact with that phase of the contact line, drawing electrical energy from the ground distribution room into the car's electrical room for production. A schematic diagram of the sliding contact line is shown below. Figure 1 As shown. The four main contact lines of a coke oven are characterized by their long distance, heavy load, harsh working environment, and high vibration. Due to their long-term operation under high load and the fact that maintenance cycles are generally more than once a month, if inspections are not timely, the connection points 2 (power supply cable to the contact line), 4 (joints between different sections of the contact line), and 5 (contact points between the current collector and the contact line) often become critical areas prone to severe deterioration. Moreover, these areas are located in frequently operating areas, are relatively hidden, and are inconvenient to inspect and maintain. They are easily susceptible to failure due to joint breakage, current collector damage, etc., leading to power outages. Currently, the inspection of the contact lines mainly relies on periodic manual inspections. Because the appearance changes during failures are not obvious and faults cannot be effectively identified by the naked eye, very few potential problems can be detected manually. Most inspections focus on emergency repairs after an accident, impacting coke oven production. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by providing a monitoring method for the sliding contact lines of the four main cars of a coke oven. This technical solution enables timely and effective monitoring of the status of the sliding contact lines. The solution includes a sliding contact line monitoring device and a method for determining the cause and location of faults.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a monitoring method for the sliding contact lines of the four main cars of a coke oven, characterized in that the method includes the following steps:

[0005] Step 1: Design a sliding contact line monitoring device;

[0006] Step 2: The sliding contact line monitoring device samples values ​​such as temperature, current, and voltage under actual load conditions and records the location of these values.

[0007] Step 3: By comparing the values ​​at different positions of the same phase conductor rail, determine the abnormality of the conductor rail and confirm the location of the abnormality.

[0008] Step 4: By comparing the values ​​of different phase sliding contact lines, determine the abnormality of the sliding contact line and confirm the abnormal sliding contact line and its location.

[0009] As an improvement of the present invention, step 1: design a sliding contact line monitoring device, specifically as follows: the sliding contact line monitoring device is installed on the vehicle and runs with the vehicle, mainly including a temperature monitoring device for measuring the temperature of each phase of the sliding contact line, a current detection device for measuring the incoming current, a voltage monitoring device for measuring the incoming voltage, and an address detection device for recording the current position of the trolley. The above devices transmit the detected real-time signals to the sliding contact line monitoring and control system on the vehicle, and the contact line monitoring and control system performs logic control to determine the current operating status of the sliding contact line; the temperature monitoring device is installed near each current collector (5) of the trolley, installed at the front end of the current passing through the sliding contact line and the current collector connection point, to ensure that there is a load current flowing through the monitored sliding contact line, and to sample the temperature rise generated by the trolley's operating current on the sliding contact line; the current detection device is installed at the rear end of the trolley's current collector to detect the current entering the trolley from each phase of the sliding contact line; the voltage monitoring device is installed at the rear end of the trolley's current collector to detect the line voltage or phase voltage entering the trolley from each phase of the sliding contact line; the address detection device is installed on the trolley and performs address distance measurement as the trolley runs, to record the real-time position of the trolley.

[0010] As an improvement of the present invention, step 2 is specifically as follows: Utilizing the high load and high current characteristics of the coke oven trolley during its travel, the state of the sliding contact line under actual working load can be measured. Taking the first end of the vehicle's running area on the sliding contact line as the zero point of the measurement address scale, the vehicle runs on the sliding contact line with constant power and speed. Various sensors on the sliding contact line monitoring device start working, and the on-board position sensor continuously measures. After reaching a position, the sliding contact line monitoring system will record the temperature data T, the incoming voltage signal V, and the incoming current signal A of each phase of the sliding contact line at that position.

[0011] As an improvement of the present invention, step 3 is specifically as follows: the vehicle's address value is used as the X-axis coordinate, and the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by the single-phase sliding contact line are used as the Y-axis coordinates. The resulting curves can be used for data analysis and anomaly judgment. When the difference between the existing abnormal value and the normal value is greater than the set threshold, an alarm interlock signal is generated.

[0012] As an improvement of the present invention, step 4 is specifically as follows: using the vehicle's address value as the X-axis coordinate, and using the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by each phase sliding contact line as the Y-axis coordinate, different planar coordinate curve trend graphs are generated. The generated curves can be used for data analysis and anomaly judgment. When the abnormal value on a certain curve differs from the value on the other two curves by more than a set threshold, an alarm interlock signal is generated.

[0013] Compared with existing technologies, the present invention has the following advantages: 1) Through the commissioning of the above-mentioned equipment and the implementation of the monitoring method, the real-time operating status of the coke oven trolley sliding contact line can be automatically analyzed, and the deterioration trend of the sliding contact line can be detected early to avoid the expansion of accidents; 2) The solution can replace manual inspection of the trolley sliding contact line, and the monitoring is more comprehensive; the fault location and type of the sliding contact line can be determined by threshold setting and real-time comparison; 3) The solution utilizes the characteristics of the coke oven trolley to detect the status of the sliding contact line under load, and the monitoring results are accurate and reliable, without affecting the production of vehicles on the same track; 4) Abnormal results are easy to judge, and any deterioration trend of the sliding contact line can be shown by the change of the curve; 5) Online real-time monitoring can detect the deterioration trend of the sliding contact line early to avoid the expansion of accidents. Attached Figure Description

[0014] Figure 1 Schematic diagram of the four sliding contact lines of a coke oven;

[0015] Figure 2 Structure diagram of the sliding contact line monitoring and control system;

[0016] Figure 3 Installation diagram of the sliding contact line monitoring and control system;

[0017] Figure 4 Data trend chart and fault location diagram of the sliding contact line;

[0018] Figure 5 A trend chart comparing different parameters generated from the recorded values.

[0019] Wherein: 1-Power supply line for sliding contact line; 2-Incoming line contact point; 3-Sliding contact line; 4-Connecting row between sliding contact lines; 5-Heavy car collector; 6-Collector incoming line; 7-Coke oven heavy car. Detailed Implementation

[0020] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0021] Example 1: See Figure 1 A monitoring method for the sliding contact lines of the four main cars of a coke oven is proposed, which enables timely and effective monitoring of the status of the sliding contact lines. This technology includes a set of sliding contact line monitoring devices and a method for determining the cause and location of faults.

[0022] A method for monitoring the sliding contact lines of the four main cars of a coke oven, the method comprising the following steps:

[0023] Step 1: Design a sliding contact line monitoring device;

[0024] Step 2: The sliding contact line monitoring device samples values ​​such as temperature, current, and voltage under actual load conditions and records the location of these values.

[0025] Step 3: By comparing the values ​​at different positions of the same phase conductor rail, determine the abnormality of the conductor rail and confirm the location of the abnormality.

[0026] Step 4: By comparing the values ​​of different phase sliding contact lines, determine the abnormality of the sliding contact line and confirm the abnormal sliding contact line and its location.

[0027] Step 1: Design a sliding contact line monitoring device, specifically as follows: The sliding contact line monitoring device is installed on the vehicle and runs with the vehicle. It mainly includes a temperature monitoring device for measuring the temperature of each phase of the sliding contact line, a current detection device for measuring the incoming current, a voltage monitoring device for measuring the incoming voltage, and an address detection device for recording the current location of the trolley. The above devices transmit the detected real-time signals to the sliding contact line monitoring and control system on the vehicle. The contact line monitoring and control system performs logic control to determine the current operating status of the sliding contact line. The temperature monitoring device is installed near each current collector (5) of the trolley. It is installed at the front end of the current passing through the sliding contact line and the current collector connection point to ensure that there is a load current flowing through the monitored sliding contact line and to sample the temperature rise generated by the trolley's operating current on the sliding contact line. The current detection device is installed at the rear end of the trolley's current collector to detect the current entering the trolley from each phase of the sliding contact line. The voltage monitoring device is installed at the rear end of the trolley's current collector to detect the line voltage or phase voltage entering the trolley from each phase of the sliding contact line. The address detection device is installed on the trolley and performs address distance measurement as the trolley runs to record the real-time location of the trolley.

[0028] Step 2 is as follows: Utilizing the high load and high current characteristics of the coke oven trolley during travel, the actual working load of the sliding contact line can be measured. Taking the beginning of the vehicle's running area on the sliding contact line as the zero point of the measurement address scale, the vehicle runs on the sliding contact line with constant power and speed. Various sensors on the sliding contact line monitoring device start working, and the on-board position sensor continuously measures. After reaching a position, the sliding contact line monitoring system will record the temperature data T, incoming voltage signal V, and incoming current signal A of each phase of the sliding contact line at that position.

[0029] Step 3 is as follows: The vehicle's address is used as the X-axis coordinate, and the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by the single-phase sliding contact line are used as the Y-axis coordinates. The resulting curves can be used for data analysis and anomaly judgment. When the difference between the existing abnormal value and the normal value is greater than the set threshold, an alarm interlock signal is generated.

[0030] Step 4 is as follows: Using the vehicle's address as the X-axis coordinate, and using the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by each phase sliding contact line as the Y-axis coordinate, different planar coordinate curve trend graphs are generated. The generated curves can be used for data analysis and anomaly judgment. When the difference between the abnormal value on a certain curve and the value on the other two curves is greater than the set threshold, an alarm interlock signal is generated.

[0031] The structure of the coke oven four-car sliding contact line monitoring device is as follows: Figure 2 As shown, the system, installed on the vehicle and running with it, mainly includes a temperature monitoring device for measuring the temperature of each phase of the sliding contact line, a current detection device for measuring the incoming current, a voltage monitoring device for measuring the incoming voltage, and an address detection device for recording the current position of the trolley. These devices transmit the detected real-time signals to the sliding contact line monitoring and control system on the vehicle. The system then performs logic control to determine the current operating status of the sliding contact line. The temperature monitoring device is installed near each current collector 5 of the trolley, specifically at the point where current flows through the sliding contact line and the current collector connection point, ensuring that a load current flows through the monitored sliding contact line and sampling the temperature rise caused by the trolley's operating current. The current detection device is installed at the rear end of the trolley's current collector to detect the current entering the trolley from each phase of the sliding contact line. The voltage monitoring device is installed at the rear end of the trolley's current collector to detect the line voltage or phase voltage entering the trolley from each phase of the sliding contact line. The address detection device is installed on the trolley and performs address measurement as the trolley moves, recording the trolley's real-time position. A schematic diagram of the installation of each detection device is shown below. Figure 3 As shown.

[0032] With the hardware testing conditions in place, the sampled data also needs to be automatically judged and analyzed to confirm the current state of the conductor rail. The judgment method is as follows: taking advantage of the high load and high current characteristics of the coke oven trolley during operation, the state of the conductor rail under the actual working load can be measured. Taking the beginning of the vehicle's running area on the conductor rail as the zero point of the measurement address scale, the vehicle runs on the conductor rail at a constant power and speed. The various sensors on the conductor rail monitoring device start working, and the on-board position sensor continuously measures. After reaching a position, the conductor rail monitoring system will record the temperature data T1, incoming voltage signal V1, and incoming current signal A1 on conductor rail L1 at that position; the temperature data T2, incoming voltage signal V2, and incoming current signal A2 on conductor rail L2, and so on. Under normal circumstances, considering that the resistance of the conductor rail itself is very small, for a single conductor rail, the temperature rise, current, and phase voltage values ​​recorded at different positions should be similar. Only when the physical state of the conductor rail changes (fault) will these signal values ​​change abruptly. These recorded values ​​can be generated in the control system, including... Figure 4The various trend charts shown. Using the address value of the vehicle as the X-axis coordinate, and taking the measured V1, A1, and T1 of the sliding contact line L1 phase as the Y-axis coordinates respectively, the generated curves can be used for data analysis and anomaly judgment.

[0033] Under the condition that the load fluctuation of the vehicle is not large and the state is normal, the changes of each sampling value obtained by the sliding contact line are relatively gentle, such as Figure 4 The parameters recorded at the first 100-meter position shown. Suppose the sampling values at this time are V1a, A1a, and T1a respectively. However, at the 100-meter position, all sampling values have mutated. Suppose the sampling values at this time are V1b, A1b, and T1b respectively, and V1b < V1a, A1b < A1a, and T1b > T1a. When the difference is greater than the set threshold (±5%), it can be considered that the contact at the incoming line access point 2 at this part may be poor, resulting in an increase in the resistance of the sliding contact line, reducing the voltage and current entering the vehicle. And according to the electrothermal formula Q = I 2 ×T to judge that due to the large contact resistance on the sliding contact line, the temperature rise of the sliding contact line at this part is obvious. Therefore, it is necessary to check the power incoming connection point part of the sliding contact line. Similarly, at about the 230-meter position, there is also a mutation in the sampling values. Suppose the sampling values at this time are V1c, A1c, and T1c respectively, and V1b < V1a, A1b < A1a, and T1b ≈ T1a. When only the voltage and current differences are greater than the set threshold (±5%) and the temperature rise change is not obvious, it can be considered that the contact between the sliding contact line and the current collector at this part may be poor. Due to the increase in contact resistance, the voltage and current entering the vehicle become smaller. And because the sliding contact line itself is in a normal state, it is necessary to check the contact part between the sliding contact line and the current collector and the current collector part at this position.

[0034] Since the sampling values can more comprehensively and detailedly reflect the physical changes of the sliding contact line, the sliding contact line monitoring system can also judge the abnormal situation of the sliding contact line by comparing the values of different phases of the sliding contact line. For example, by retrieving Figure 5 The voltage monitoring data of each phase shown, it can be found that there is an obvious voltage drop in the L1 phase after the 100-meter position, while the other phases are basically normal. Then it can be judged that there is a poor contact problem with the current collector of the L1 phase at this place. The reason for the anomaly can be confirmed by checking the sliding contact line and the current collector at the 100-meter position of the L1 phase, whether it is due to the impact between the current collector and the sliding contact line or the damage of the current collector itself.

[0035] Under normal operating conditions, the temperature, current, and voltage values ​​sampled from the same phase of the conductor rail should not fluctuate significantly. Therefore, any fluctuation in the sampled value at any location that differs from other locations can serve as a point for troubleshooting and cause analysis. Moreover, under balanced load conditions, the sampling parameters between different phases of the conductor rail are not significantly different. By comparing various locations, it is easy to identify abnormal conditions of the conductor rail from the trend chart generated by the conductor rail monitoring system and quickly pinpoint the location of the abnormality. Furthermore, because vehicles operate under significant loads during conductor rail monitoring, with large vehicles having high incoming currents, the sampling conditions closely resemble those of the conductor rail during operation. Therefore, this monitoring method can detect some abnormalities that cannot be found during power outage inspections of the conductor rail.

[0036] Specific implementation method: Refer to Figure 1 — Figure 5 , refer to Figure 2 and Figure 3 The construction and installation of the conductor rail monitoring and control system, in this example, uses a conductor rail length of 300 meters. The westernmost point (right side) is designated as the zero point of the conductor rail address scale. The power supply line to the conductor rail originates from the easternmost point (left side), with a voltage level of 380VAC. The vehicle sampling speed is 0.1 m / s, the operating power is 60 kW, the current is 120 A, the temperature difference threshold is 20%, and the voltage and current difference thresholds are 5%. Temperature monitoring devices for the main trolley are installed on the right side of each current collector, sampling the temperature rise of the conductor rail caused by the trolley's operating current. Current detection devices, using current transformers, are installed at the rear end of the trolley's current collectors to detect the current entering the trolley for each phase of the conductor rail. Voltage monitoring devices are installed at the rear end of the trolley's current collectors to detect the line voltage entering the trolley for each phase of the conductor rail. The address detection device uses an absolute encoder, installed on the driven wheel of the trolley. The encoder rotates and counts as the trolley runs, calculating the address value and recording the real-time position of the trolley. All these signals are transmitted to the conductor rail monitoring system.

[0037] When the trolley travels eastward from the zero point of the sliding contact line at a speed of 0.1 m / s, the operating power is 60 kW and the current is 120 A. The sliding contact line monitoring system records the current address value, the temperatures T1, T2, and T3 on each phase of the sliding contact line, the voltage values ​​V1, V2, and V3, and the current values ​​A1, A2, and A3 on each phase. These recorded values ​​can be used by the control system to generate a system containing... Figure 4The various trend graphs shown are illustrated. With the vehicle's address value as the X-axis coordinate and the measurements of V1, A1, and T1 taken by the sliding contact line L1 phase as the Y-axis coordinates, the resulting curves can be used for data analysis and anomaly detection. Under normal conditions, the measured temperature values ​​T1=T2=T3=30℃, the sampled voltage values ​​V1=V2=V3=380V, and the sampled current values ​​A1=A2=A3=120A. If at a location 100 meters away, the sampled temperature value T1a=45℃, the sampled voltage value V1a=360V, and the sampled current value A1a=90A, and |T1a-T1| / T1=50%>20%, |V1a-V1| / T1=5.3%>5%, and |A1a-A1| / T1=25%>5%, the cause can be analyzed as follows: at the 100-meter location, the contact line may be faulty due to poor contact between the contact line connector 4 and the contact line itself, leading to increased contact line resistance and reduced voltage and current entering the vehicle. Furthermore, according to the electrothermal formula Q=I 2 The reason for the significant temperature rise in the sliding contact line is determined to be due to high contact resistance. Therefore, the power supply connection point of this sliding contact line needs to be inspected. Similarly, at approximately 230 meters, the sampling values ​​also show abrupt changes. Let the sampling values ​​at this point be V1c = 355V, A1c = 86A, and T1c = 35℃.

[0038] |T1c-T1| / T1=17%<20%, |V1c-V1| / T1=6.6%>5%, |A1c-A1| / T1=28%>20%. Only when the voltage and current difference is greater than the set threshold (±5%) and the temperature rise is not significant, it can be considered that the problem may be due to poor contact between the sliding contact line and the current collector. The increased contact resistance leads to a decrease in the voltage and current entering the vehicle. Since the sliding contact line itself is in normal condition, it is necessary to check the contact points between the sliding contact line and the current collector at this position and the current collector itself.

[0039] By retrieving Figure 5 The voltage monitoring data for each phase shown reveals a significant voltage drop in phase L1 after the 100-meter mark, while the other phases are generally normal. This indicates that the current collector in phase L1 has a poor contact problem at that location. The cause of the abnormality can be determined by checking the sliding contact line and current collector at the 100-meter mark of phase L1, whether it is due to an impact from the current collector and sliding contact line or damage to the current collector itself.

[0040] Under normal operating conditions, the temperature, current, and voltage values ​​sampled from the same phase of the conductor rail should not fluctuate significantly. Therefore, any fluctuation in the sampled value at any location that differs from other locations can serve as a point for troubleshooting and cause analysis. Moreover, under balanced load conditions, the sampling parameters between different phases of the conductor rail are not significantly different. By comparing various locations, it is easy to identify abnormal conditions of the conductor rail from the trend chart generated by the conductor rail monitoring system and quickly pinpoint the location of the abnormality. Furthermore, because vehicles operate under significant loads during conductor rail monitoring, with large vehicles having high incoming currents, the sampling conditions closely resemble those of the conductor rail during operation. Therefore, this monitoring method can detect some abnormalities that cannot be found during power outage inspections of the conductor rail.

[0041] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A method for monitoring the sliding contact lines of the four main cars of a coke oven, characterized in that, The method includes the following steps: Step 1: Design a sliding contact line monitoring device; Step 2: The sliding contact line monitoring device samples the temperature, current and voltage values ​​of each phase of the sliding contact line under actual working conditions, and records the location of these values; Step 3: By comparing the sampled values ​​at different locations of the same phase conductor rail, determine the abnormality of the conductor rail and confirm the location of the abnormality; Step 4: By comparing the sampled values ​​of different phase sliding contact lines, determine the abnormality of the sliding contact line and confirm the abnormal sliding contact line and its location; The specific process of step 2 is as follows: Taking advantage of the high load and high current characteristics of the coke oven trolley during travel, the state of the sliding contact line under the actual working load is measured. Taking the first end of the vehicle's running area on the sliding contact line as the zero point of the measurement address scale, the vehicle runs on the sliding contact line with constant power and speed. Various sensors on the sliding contact line monitoring device start working, and the on-board position sensor performs continuous measurement. After reaching a position, the sliding contact line monitoring system will record the temperature data T, the incoming voltage signal V, and the incoming current signal A of each phase of the sliding contact line at that position. Step 3 is as follows: The vehicle's address value is used as the X-axis coordinate, and the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by the single-phase sliding contact line are used as the Y-axis coordinates. The resulting curves can be used for data analysis and anomaly judgment. When the difference between the existing abnormal value and the normal value is greater than the set threshold, an alarm interlock signal is generated. Step 4 is as follows: Using the vehicle's address as the X-axis coordinate, and using the temperature data T, incoming line voltage signal V, and incoming line current signal A measured by each phase sliding contact line as the Y-axis coordinate, different planar coordinate curve trend graphs are generated. The generated curves are used for data analysis and anomaly judgment. When the difference between the abnormal value on a certain curve and the value on the other two curves is greater than the set threshold, an alarm interlock signal is generated.

2. The monitoring method for the four main car sliding contact lines of a coke oven according to claim 1, characterized in that, Step 1: Design a sliding contact line monitoring device, as follows: The sliding contact line monitoring device is installed on the vehicle and runs with the vehicle. It mainly includes a temperature monitoring device for measuring the temperature of each phase of the sliding contact line, a current detection device for measuring the incoming current, a voltage monitoring device for measuring the incoming voltage, and an address detection device for recording the current position of the trolley. The above devices transmit the detected real-time signals to the sliding contact line monitoring and control system on the vehicle. The contact line monitoring and control system performs logic control to determine the current operating status of the sliding contact line. The temperature monitoring device is installed near each current collector (5) of the trolley. It is installed at the front end of the current passing through the sliding contact line and the current collector connection point to ensure that there is a load current flowing through the monitored sliding contact line and to sample the temperature rise of the sliding contact line caused by the trolley's operating current. The current detection device is installed at the rear end of the trolley's current collector to detect the current entering the trolley from each phase of the sliding contact line. The voltage monitoring device is installed at the rear end of the trolley's current collector to detect the line voltage or phase voltage entering the trolley from each phase of the sliding contact line. The address detection device is installed on the trolley and performs address distance measurement as the trolley runs to record the real-time position of the trolley.

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