Locking device applied to coke oven electric vehicle and fault self-diagnosis method

Abstract

The invention discloses a locking device applied to a coke oven electric car and a fault self-diagnosis method. The locking device comprises a locking device body composed of an ejector rod, a fixing support, a connecting rod, a supporting plate device, an unlocking limiting device and a locking limiting device. Based on the locking device, a state setting self-diagnosis method during lifting of the supporting plate device, a state setting self-diagnosis method during falling of the supporting plate device, a state setting self-diagnosis method after lifting of the supporting plate device, a state setting self-diagnosis method after falling of the supporting plate device and a limiting state setting self-diagnosis method are set. According to the method, a locking device fault self-diagnosis program is newly added, the state of the locking device is detected in real time, an alarm is given and the traction action is stopped immediately after abnormity is found, the situation that the action of the locking device is not in place can be found in time, collision accidents are avoided, and the reliability and the safety of the introduction / extrusion action of the electric car are improved.

Description

Technical Field

[0001] This invention relates to the field of coke oven technology in iron and steel metallurgy, and in particular to a method for self-diagnosing the fault / operating status of a coke oven electric car interlocking device. Background Technology

[0002] The coke oven electric car is one of the four main types of cars used in a coke oven. Its main function is to move empty coke cans to the coke pushing position. Coke pushing refers to the process of using a coke pusher to push coke out of the carbonization chamber in a coke oven operation. Empty coke cans are used to pick up coke during the pushing process. After the coke is pushed, the full coke cans are transported to the traction point of the dry quenching system. The full coke cans are then guided into the dry quenching system by traction. After the dry quenching system empties the coke from the full coke cans, the coke oven electric car pushes the empty coke cans out from the traction point and then travels to the coke pushing position to pick up coke again. This cycle continues.

[0003] The existing coke oven electric car has a locking device that is normally locked to prevent the coke cans on the car from moving. When the coke cans are introduced or removed from the traction point of the dry quenching system, the locking device must be unlocked through the pallet device at the traction point before the coke cans can be moved.

[0004] However, through long-term operation and feedback from on-site staff, it was learned that if the pallet device or locking device malfunctions, the locking device may unlock abnormally, meaning that the push rod is in the raised position but the coke car is not locked. If the push rod is then used for introduction / extraction, it will cause a collision between the push rod and the coke car, resulting in a safety accident and affecting normal operations.

[0005] In summary, the abnormal phenomena of the existing interlocking device are mainly due to the fact that the coke oven car relies solely on the signal interlock of the traction pallet device for protection during the introduction / extraction of the coke oven car, leading to accidents. Therefore, there is an urgent need for a new type of coke oven electric car interlocking device and a method for confirming the working / fault status to avoid such accidents. Summary of the Invention

[0006] To address the issue that existing interlocking devices rely solely on the signal interlock of the traction pallet device for protection during the coke oven's introduction / extrusion operation, without integrating the interlocking device's signal, this invention provides an interlocking device for coke oven trolleys and a fault self-diagnosis method. This method can promptly detect malfunctions in the interlocking device, preventing collisions and improving the reliability and safety of the trolley's introduction / extrusion operation.

[0007] The present invention relates to an interlocking device and a fault self-diagnosis method for a coke oven electric car, the specific structure and method of which are described below:

[0008] A locking device for coke oven electric carts includes a locking device consisting of a top rod, a fixed bracket, a connecting rod, a support plate device, an unlocking limit switch, and a locking limit switch, characterized in that:

[0009] The fixed bracket is fixed on the coke tanker. The vertically arranged top rod and the horizontally arranged connecting rod are respectively arranged on both sides of the fixed bracket, and the top rod and the connecting rod are connected together with the fixed bracket as the connection point.

[0010] The connecting rod is equipped with a counterweight, and a support plate device is provided below the connecting rod. The unlocking limit and the locking limit are respectively set on the upper and lower sides of the connecting rod rotation path.

[0011] When the pallet device is in a horizontal position, the connecting rod descends due to its counterweight, causing the top rod to rise and lock the coke can. At this time, the locking limit is triggered, but the unlocking limit is not triggered. When the tram arrives at the traction position and needs to pick up and deliver the coke can, the tram issues an introduction / extraction command. After receiving the introduction / extraction signal, the traction unit lifts the pallet device. After the pallet device is lifted, it contacts the bottom of the connecting rod and pushes the connecting rod upward, causing the top rod to descend. The coke can is in an unlocked state. At this time, the locking limit is not triggered, but the unlocking limit is triggered. When the pallet device is fully lifted, if the introduction / extraction command issued by the tram is maintained, the traction unit will perform the introduction / extraction action.

[0012] A fault self-diagnosis method for a coke oven electric car interlocking device, based on the aforementioned interlocking device, is divided into: a self-diagnosis method for setting the state when the pallet device is raised, a self-diagnosis method for setting the state when the pallet device is lowered, a self-diagnosis method for setting the state after the pallet device is raised, a self-diagnosis method for setting the state after the pallet device is lowered, and a limit state setting self-diagnosis method, as detailed below:

[0013] 1) The state of the pallet device when it is raised:

[0014] After receiving the inlet / outlet signal, the traction device is lifted. The pallet device is lifted from the horizontal position and turns to the vertical position. During this process, the pallet device contacts the bottom of the connecting rod and pushes the connecting rod upward. The connecting rod is released from the locking limit, and the limit signal at this point changes from 1 to 0. When the pallet device is fully lifted to the vertical position, the connecting rod moves up into place and enters the detection range of the unlocking limit, and the limit signal at this point changes from 0 to 1.

[0015] A self-diagnostic method is set for the state of the pallet device when it is raised, as follows:

[0016] When the limit signal of the locking limit changes from 1 to 0, start timing T, and set a determination time T2. Set the time required for the pallet to be lifted from the horizontal position to the vertical position under normal conditions as the delay time T1, and T2 should be slightly greater than T1. When T1 < T < T2, determine whether the signal of the unlocking limit changes from 0 to 1. If it changes to 1, it is judged as normal; if it remains 0, it is judged as abnormal.

[0017] 2) State when the pallet device drops:

[0018] The pallet device) drops from the vertical position to the horizontal position and no longer touches the bottom of the connecting rod. The connecting rod drops due to the influence of its counterweight. The connecting rod disengages from the unlocking limit, and the limit signal at this place changes from 1 to 0. When the pallet device completely drops to the horizontal position, the connecting rod drops in place and enters the detection range of the locking limit, and the limit signal at this place changes from 0 to 1.

[0019] Set a self-diagnosis method for the state when the above pallet device drops as follows:

[0020] When the unlocking limit changes from 1 to 0, start timing T3, and set a determination time T5. Set the time required for the pallet to drop from the vertical position to the horizontal position under normal conditions as the delay time T4, and T5 should be slightly greater than T4. When T4 < T3 < T5, determine whether the signal of the locking limit changes from 0 to 1. If it changes to 1, it is judged as normal; if it remains 0, it is judged as abnormal.

[0021] 3) State after the pallet device is lifted:

[0022] After the tram issues an in / out command, the pallet device starts to lift, and at the same time issues a tram running lock signal to prevent the tram running action from damaging the pallet. When the pallet device is completely lifted, the traction starts to perform the in / out action. At this time, the signal of the unlocking limit is 1, and the signal of the locking limit (6) is 0.

[0023] Set a self-diagnosis method for the state after the above pallet device is lifted as follows:

[0024] Start timing T6 after issuing the in / out command. If the tram running lock signal is not received after exceeding the set time T7, stop issuing the in / out command and determine it as abnormal.

[0025] Start timing T8 after receiving the tram running lock signal during in / out. Set a delay time T9 to wait for the pallet to be completely lifted, and then set a time T10 required for in / out under normal conditions. When T9 < T8 < T10, continuously determine whether the signal of the unlocking limit is 1 and whether the signal of the locking limit is 0. If any of the signals at these two limits does not meet the requirements, it is determined as abnormal and an alarm is output.

[0026] 4) The state of the pallet device after it has fallen:

[0027] After the coke can is introduced / extruded, the pallet device begins to descend. During the descent, the unlock limit signal changes from 1 to 0, and the lock limit signal changes from 0 to 1. When the pallet device has descended to the horizontal position, the trolley travel lock signal is stopped. The trolley meets the travel conditions and can travel.

[0028] A self-diagnostic method is set for the state of the aforementioned pallet device after it falls, as follows:

[0029] After the trolley travel lock signal disappears, check whether the unlock limit signal is 0 and the lock limit signal is 1. If either of these two limit signals does not meet the requirements, an abnormality is determined and an alarm is output.

[0030] 5) Limit state:

[0031] To improve the reliability of the two limit signals and prevent false alarms caused by limit failures, redundant detection and self-diagnosis have been added to both the unlock limit and the lock limit to ensure timely detection of signal abnormalities and prevent false alarms.

[0032] The self-diagnostic method for the above-mentioned limit states is set as follows:

[0033] Add a new locking limit and check in real time whether the signals of the two locking limits are consistent. If the signals are inconsistent and the duration exceeds the set time T11, it is determined that one of the locking limit signals is abnormal and an abnormal state is determined. Similarly, add a new unlocking limit and perform real-time detection and judgment.

[0034] According to a method for self-diagnosing faults in a coke oven electric car interlocking device, the method for self-diagnosing the limit state setting in the present invention is characterized in that, in the limit state setting self-diagnostic method of the above scheme 5), the signals of the unlock limit and the lock limit are synchronously determined. If the unlock limit and the lock limit are triggered at the same time, an abnormality is determined and an alarm is output.

[0035] The following beneficial effects were obtained by using the interlocking device and fault self-diagnosis method for coke oven electric car according to the present invention:

[0036] 1. The present invention relates to a locking device and a fault self-diagnosis method for coke oven electric cars. By adding a fault self-diagnosis program for the locking device, the status of the locking device is detected in real time. If an abnormality is detected, an alarm is immediately issued and the traction action is stopped.

[0037] 2. The present invention provides a method for self-diagnosing faults in a coke oven trolley interlocking device, which can promptly detect situations where the interlocking device is not functioning properly, avoid collision accidents, and improve the reliability and safety of the trolley introduction / exit operation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the locked state of a locking device applied to a coke oven electric car locking device and a fault self-diagnosis method according to the present invention.

[0039] Figure 2 This is a schematic diagram of the unlocking state of a locking device applied to a coke oven trolley locking device and a fault self-diagnosis method according to the present invention.

[0040] In the diagram: 1-Top rod, 2-Fixed bracket, 3-Connecting rod, 3a-Counterweight, 4-Plate device, 5-Unlock limit, 6-Locking limit. Detailed Implementation

[0041] The technical means, creative features, objectives, and effects of the present invention, applied to a coke oven trolley interlocking device and fault self-diagnosis method, will be further described below with reference to the accompanying drawings and embodiments.

[0042] Example

[0043] like Figure 1 and Figure 2 As shown, a locking device for coke oven electric carts includes a locking device composed of a top rod 1, a fixed bracket 2, a connecting rod 3, a support plate device 4, an unlocking limit 5, and a locking limit 6, characterized in that:

[0044] The fixed bracket 2 is fixed on the coke tank car. The vertically arranged top rod 1 and the horizontally arranged connecting rod 3 are respectively arranged on both sides of the fixed bracket, and the top rod and the connecting rod are connected together with the fixed bracket as the connection point.

[0045] A counterweight 3a is provided on the connecting rod 3, and a support plate device 4 is provided below the connecting rod. The unlocking limit 5 and the locking limit 6 are respectively provided on the upper and lower sides of the connecting rod rotation path.

[0046] like Figure 1 As shown, when the pallet device 4 is in the horizontal position, the connecting rod 3 descends due to the influence of its counterweight, causing the top rod 1 to rise and lock the coke can. At this time, the locking limit 6 is triggered, while the unlocking limit 5 is not triggered; Figure 2 As shown, when the tram arrives at the traction position and needs to pick up and deliver coke cans, the tram issues an introduction / extraction command. After receiving the introduction / extraction signal, the traction unit lifts the pallet device. After the pallet device is lifted, it contacts the bottom of the connecting rod and pushes the connecting rod upward, causing the push rod to descend. The coke can is in the unlocked state. At this time, the locking limit is not triggered, but the unlocking limit is triggered. When the pallet device is fully lifted, if the introduction / extraction command issued by the tram is maintained, the traction unit will perform the introduction / extraction action.

[0047] A fault self-diagnosis method applied to the locking device of a coke oven trolley. Based on the above-mentioned locking device, this fault self-diagnosis method is divided into: the state setting self-diagnosis method when the pallet device is lifted, the state setting self-diagnosis method when the pallet device is lowered, the state setting self-diagnosis method after the pallet device is lifted, the state setting self-diagnosis method after the pallet device is lowered, and the limit state setting self-diagnosis method, which are specifically described as follows:

[0048] 1) State when the pallet device is lifted:

[0049] After the traction receives the introduction / extrusion signal, the pallet device 4 is lifted. The pallet device is lifted from the horizontal position and turned to the vertical position. During this process, when the pallet device touches the bottom of the connecting rod 3, the connecting rod is pushed upward, and the connecting rod disengages from the locking limit 6, changing the limit signal at this place from 1 to 0. When the pallet device is completely lifted to the vertical position, the connecting rod moves up in place and enters the detection range of the unlocking limit 5, changing the limit signal at this place from 0 to 1;

[0050] For the above state setting self-diagnosis method when the pallet device is lifted, as follows:

[0051] When the limit signal of the locking limit changes from 1 to 0, start timing T, and set a judgment time T2. Set the time required for the pallet to be lifted from the horizontal position to the vertical position under normal conditions as the delay time T1, and T2 needs to be slightly greater than T1. When T1 < T < T2, judge whether the signal of the unlocking limit changes from 0 to 1. If it changes to 1, it is judged as normal; if it is still 0, it is judged as abnormal;

[0052] 2) State when the pallet device is lowered:

[0053] The pallet device 4 falls from the vertical position to the horizontal position, no longer touching the bottom of the connecting rod 3. The connecting rod descends due to the influence of its counterweight, and the connecting rod disengages from the unlocking limit 5, changing the limit signal at this place from 1 to 0. When the pallet device completely falls to the horizontal position, the connecting rod descends in place and enters the detection range of the locking limit 6, changing the limit signal at this place from 0 to 1;

[0054] For the above state setting self-diagnosis method when the pallet device is lowered, as follows:

[0055] When the unlocking limit changes from 1 to 0, start timing T3, and set a judgment time T5. Set the time required for the pallet to descend from the vertical position to the horizontal position under normal conditions as the delay time T4, and T5 needs to be slightly greater than T4. When T4 < T3 < T5, judge whether the signal of the locking limit changes from 0 to 1. If it changes to 1, it is judged as normal; if it is still 0, it is judged as abnormal;

[0056] 3) State after the pallet device is lifted:

[0057] After the tram issues the infeed / outfeed command, the pallet device 4 starts to lift, and at the same time issues a tram running lock signal to prevent the tram running action from damaging the pallet. When the pallet device is fully lifted, the infeed / outfeed action of the traction starts. At this time, the signal of the unlocking limit 5 is 1 and the signal of the locking limit 6 is 0;

[0058] Set the self-diagnosis method for the state of the pallet device after lifting as follows:

[0059] Start timing T6 after issuing the infeed / outfeed command. If the tram running lock signal is not received after exceeding the set time T7, stop issuing the infeed / outfeed command and determine an abnormality;

[0060] Start timing T8 after receiving the tram running lock signal during infeed / outfeed. Set the delay time T9 to wait for the pallet to be fully lifted, and then set a time T10 required for infeed / outfeed under normal circumstances. When T9 < T8 < T10, continuously judge whether the signal of the unlocking limit is 1 and whether the signal of the locking limit is 0. If any of the signals at these two limits does not meet the requirements, determine an abnormality and output an alarm;

[0061] 4) State after the pallet device drops:

[0062] After the infeed / outfeed action of the coke pot is completed, the pallet device 4 starts to descend. During the descent, the signal of the unlocking limit 5 changes from 1 to 0, and the signal of the locking limit 6 changes from 0 to 1. When the pallet device is fully lowered to the horizontal position, stop sending the tram running lock signal, and the tram meets the running conditions and can run;

[0063] Set the self-diagnosis method for the state of the pallet device after dropping as follows:

[0064] After the tram running lock signal disappears, judge whether the signal of the unlocking limit is 0 and whether the signal of the locking limit is 1. If any of the signals at these two limits does not meet the requirements, determine an abnormality and output an alarm;

[0065] 5) Limit state:

[0066] To improve the reliability of the signals of the two limits and prevent misreporting of signals during limit failures from causing diagnostic abnormalities, redundant detection and self-diagnosis are added to both the unlocking limit 5 and the locking limit 6 to ensure timely detection of signal abnormalities and prevent misreporting;

[0067] Set the self-diagnosis method for the above limit state as follows:

[0068] Add a new locking limit 6 (not shown in the figure) and check in real time whether the signals of the two locking limits are consistent. If the signals are inconsistent and the duration exceeds the set time T11, it is determined that one of the locking limit signals is abnormal and an abnormal state is determined. Similarly, add a new unlocking limit 5 (not shown in the figure) and perform real-time detection and judgment.

[0069] In this embodiment, in the limit state setting self-diagnosis method of scheme 5), the signals of unlock limit 5 and lock limit 6 are synchronously judged. If the unlock limit and lock limit are triggered at the same time, an abnormality is judged and an alarm is output.

[0070] The present invention relates to a self-diagnostic method for a coke oven trolley interlocking device. By adding a self-diagnostic program for the interlocking device, the status of the interlocking device is monitored in real time. Upon detecting an abnormality, an alarm is immediately issued and the traction action is stopped. In addition, the present invention can promptly detect situations where the interlocking device is not operating properly, thus avoiding collision accidents and improving the reliability and safety of the trolley introduction / exit actions.

[0071] However, those skilled in the art should recognize that the above embodiments are only used to illustrate this application and are not intended to limit this application. Any changes or modifications to the above embodiments within the spirit and essence of this application will fall within the scope of the claims of this application.

Claims

1. A locking device applied to a coke oven tram, comprising a locking device composed of a push rod (1), a fixed bracket (2), a connecting rod (3), a pallet device (4), an unlocking limit (5) and a locking limit (6), characterized in that: The fixed bracket (2) is fixed on the coke pot car. The vertically arranged push rod (1) and the horizontally arranged connecting rod (3) are respectively arranged on both sides of the fixed bracket, and the push rod and the connecting rod are connected together with the fixed bracket as the connection point; A counterweight (3a) is arranged on the connecting rod (3), and a pallet device (4) is arranged below the connecting rod. The unlocking limit (5) and the locking limit (6) are respectively arranged on the upper and lower sides of the rotation path of the connecting rod; When the pallet device (4) is in the horizontal position, the connecting rod (3) descends under the influence of its counterweight,带动 the push rod (1) to rise, locking the coke pot. At this time, the locking limit (6) is triggered, and the unlocking limit (5) is not triggered; when the tram reaches the traction position and needs to pick up or deliver the coke pot, the tram issues an in / out command. After the traction receives the in / out signal, it raises the pallet device. After the pallet device is raised, it contacts the bottom of the connecting rod and pushes the connecting rod upward,带动 the push rod to descend, and the coke pot is in the unlocked state. At this time, the locking limit is not triggered, and the unlocking limit is triggered; when the pallet device is completely raised, if the in / out command issued by the tram remains, the traction performs the in / out action.

2. A fault self-diagnosis method for a locking device applied to a coke oven tram, based on a locking device applied to a coke oven tram as described in the above claims. This fault self-diagnosis method is divided into: a state setting self-diagnosis method when the pallet device is raised, a state setting self-diagnosis method when the pallet device is lowered, a state setting self-diagnosis method after the pallet device is raised, a state setting self-diagnosis method after the pallet device is lowered, and a limit state setting self-diagnosis method, which are specifically as follows: 1) State when the pallet device is raised: After the traction receives the in / out signal, it raises the pallet device (4). The pallet device is raised from the horizontal position and turns to the vertical position. During this process, the pallet device contacts the bottom of the connecting rod (3) and pushes the connecting rod upward. The connecting rod disengages from the locking limit (6), and the limit signal at this place changes from 1 to 0. When the pallet device is completely raised to the vertical position, the connecting rod moves upward in place and enters the detection range of the unlocking limit (5), and the limit signal at this place changes from 0 to 1; For the above state setting self-diagnosis method when the pallet device is raised, as follows: When the limit signal of the locking limit changes from 1 to 0, start timing T, and set a determination time T2. Set the time required for the pallet to be raised from the horizontal position to the vertical position under normal conditions as the delay time T1, and T2 needs to be slightly greater than T1. When T1 < T < T2, judge whether the signal of the unlocking limit changes from 0 to 1. If it changes to 1, it is judged as normal. If it is still 0, it is judged as abnormal; 2) State when the pallet device is lowered: The pallet device (4) drops from the vertical position to the horizontal position and no longer touches the bottom of the connecting rod (3). Due to the influence of its counterweight, the connecting rod descends, the connecting rod disengages from the unlocking limit (5), and the limit signal at this position changes from 1 to 0. When the pallet device completely drops to the horizontal position, the connecting rod descends in place and enters the detection range of the locking limit (6), and the limit signal at this position changes from 0 to 1; Set a self-diagnosis method for the state when the above pallet device drops, as follows: When the unlocking limit changes from 1 to 0, start timing T3 and set a determination time T5. Set the time required for the pallet to drop from the vertical position to the horizontal position under normal conditions as the delay time T4, and T5 needs to be slightly greater than T4. When T4 < T3 < T5, judge whether the signal of the locking limit changes from 0 to 1. If it changes to 1, it is judged as normal; if it is still 0, it is judged as abnormal; 3) State after the pallet device is lifted: After the tram issues the in / out instruction, the pallet device (4) starts to lift, and at the same time issues a tram running lock signal to prevent the tram running action from damaging the pallet. When the pallet device is completely lifted, the traction starts to perform the in / out action. At this time, the signal of the unlocking limit (5) is 1, and the signal of the locking limit (6) is 0; Set a self-diagnosis method for the state after the above pallet device is lifted, as follows: Start timing T6 after issuing the in / out instruction. If the tram running lock signal is not received after exceeding the set time T7, stop issuing the in / out instruction and judge it as abnormal; Start timing T8 after receiving the tram running lock signal during in / out. Set a delay time T9 to wait for the pallet to be completely lifted, and then set a time T10 required for in / out under normal conditions. When T9 < T8 < T10, continuously judge whether the signal of the unlocking limit is 1 and whether the signal of the locking limit is 0. If any of the signals at these two limits does not meet the requirements, it is judged as abnormal and an alarm is output; 4) State after the pallet device drops: After the in / out action of the coke pot is completed, the pallet device (4) starts to descend. During the descent, the signal of the unlocking limit (5) changes from 1 to 0, and the signal of the locking limit (6) changes from 0 to 1. When the pallet device completely descends to the horizontal position, stop sending the tram running lock signal, and the tram meets the running conditions and can run; Set a self-diagnosis method for the state after the above pallet device drops, as follows: After the tram running lock signal disappears, judge whether the signal of the unlocking limit is 0 and whether the signal of the locking limit is 1. If any of the signals at these two limits does not meet the requirements, it is judged as abnormal and an alarm is output; 5) Limit state: To improve the reliability of the signals at the two limits and prevent misreporting of signals due to limit failures, redundant detection and self-diagnosis are added to both the unlocking limit (5) and the locking limit (6) to ensure that signal abnormalities are detected in a timely manner and prevent misreporting; Set a self-diagnosis method for the above limit state, as follows: Add a new locking limit (6) and judge in real time whether the signals of the two locking limits are consistent. If the signals are inconsistent and the duration exceeds the set time T11, it is determined that one of the locking limit signals is abnormal and an abnormal state is determined. Similarly, add a new unlocking limit (5) and perform real-time detection and judgment.

3. The method for self-diagnosing faults in a coke oven electric car interlocking device as described in claim 2, characterized in that, In the limit state setting self-diagnosis method of the above scheme 5), the signals of unlock limit (5) and lock limit (6) are synchronously judged. If the unlock limit and lock limit are triggered at the same time, an abnormality is judged and an alarm is output.

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