A method for confirming before switching to manual in case of dry quenching hoist failure

Abstract

The application provides a kind of dry quenching hoist failure time switching manual confirmation method before, comprising: central control and field personnel cooperate to confirm dry quenching hoist fault alarm information, dry quenching hoist state signal, dry quenching hoist position and the load state of coke tank, complete the preliminary collection of fault information;First time sends the early warning instruction of prohibiting moving vehicle to the motor car driver, simultaneously informs the foreman, the on-site inspection worker, and investigates and confirms the fault type and fault position of dry quenching hoist;The control loop of dry quenching hoist, APS oil pump, loading device is all switched to the disconnected position, after preliminary confirmation safety, switch to manual operation mode;According to preset priority, the inspection of each risk point of dry quenching hoist is completed in turn.The application realizes the full-dimensional safety check of covering coke tank, trolley, APS system, lifting appliance, hoist body, formulates quantitative check standard for each key component, and completely eliminates the safety blind area of manual operation.

Description

Technical Field

[0001] This invention belongs to the field of emergency response technology for dry quenching elevator malfunctions, and more specifically, it relates to a confirmation method before switching to manual operation when a dry quenching elevator malfunctions. Background Technology

[0002] Dry quenching (CDQ) is a core energy-saving and environmentally friendly process in the modern steel and coking industry. The hoist is the key conveying equipment connecting the coke oven and the dry quenching furnace, responsible for lifting coke tins fully loaded with 1000℃ red-hot coke from the ground to the top of the dry quenching furnace, 30-50 meters high. Its operating status directly determines the continuity of the entire dry quenching system. Because the hoist operates year-round under harsh conditions of high temperature, high dust, and heavy load, sudden malfunctions are inevitable, such as false alarms due to signal interference, abnormal pressure in the APS system, and misalignment of the lifting equipment. If these issues are not handled quickly and safely, they can lead to system shutdowns or, in severe cases, serious safety accidents such as coke tin collapse, red-hot coke leakage, and equipment damage.

[0003] In existing technologies, emergency response plans for hoist malfunctions mainly fall into two categories: one is hardware-level emergency control system modifications, such as the emergency operation control system for dry quenching hoists disclosed in patent CN114371661B, which uses redundant hardware to provide backup drive in case of failure; the other is fragmented, experience-based emergency plans, which only provide simple operating procedures for single malfunctions (such as power outages or wire rope breakage). However, existing technologies have the following obvious drawbacks: 1. The lack of a standardized full-process verification mechanism means that operators often overlook key safety inspection items due to panic during emergency situations, such as the position of the bottom door rollers of the coke tank, the pressure holding status of the APS system, and the alignment clearance of the lifting gear, which can easily lead to secondary accidents during manual operation. 2. There is no signal coordination and verification mechanism between the central control room and the field. The current operation relies solely on the electronic signals from the central control room. When signal transmission fails, signal misjudgment is very likely to occur, leading to blind operation by the operators. 3. Lack of safety isolation measures: In current operations, manual mode is often switched directly without prior disconnection of the automatic interlocking circuit of related equipment (such as APS oil pump and loading device), which poses a risk of malfunction caused by automatic equipment reset.

[0004] Therefore, there is an urgent need for a standardized, full-process, and multi-dimensional emergency response method for dry quenching coke elevator malfunctions to address the shortcomings of existing technologies and ensure the safety and efficiency of the malfunction handling process. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions.

[0006] A method for confirming the operation before switching to manual mode in case of a dry quenching elevator malfunction includes: Step 1: The central control unit and on-site personnel work together to confirm the fault alarm information, status signals, position, and load status of the dry quenching elevator, and complete the initial collection of fault information. Step 2: Immediately send a warning instruction to the locomotive driver prohibiting the movement of the vehicle, and at the same time notify the shift leader and inspection worker to come to the scene to check and confirm the type and location of the dry quenching elevator malfunction. Step 3: Switch all control circuits of the dry quenching elevator, APS oil pump, and loading device to the disconnect position. After initially confirming safety, switch to manual operation mode. Step 4: Complete the inspection of each risk point of the dry quenching elevator in sequence according to the preset priority; Step 5: After all the verification items are confirmed to be correct, perform a manual trial run in low speed mode first. After confirming that there are no abnormalities in the low speed operation, gradually increase the speed. During the manual operation, the operator in the central control room and the on-site inspector should maintain real-time communication and constantly check the operating signal of the dry quenching coke elevator and the lifting height position of the coke pot to ensure that the signals of the central control room and the field are consistent in real time.

[0007] Preferably, in step 2, the types of faults investigated include at least one of the following: the dry quenching elevator not operating, the APS not clamping after the locomotive is aligned, the coke can not rotating properly, causing the dry quenching elevator to not operating, vehicle and central control signals missing, coke can rotation fault, and coke can uneven load.

[0008] Preferably, in step 4, it is checked and confirmed that the coke tank has rotated into place, the pallet triangle is in the center position, and is consistent with the feedback signal from the electric locomotive; it is also confirmed that the coke tank trolley is properly aligned with the ground clamping device and that the vehicle alignment signal is complete.

[0009] Preferably, in step 4, it is checked and confirmed that all four rollers of the bottom gate of the coke tank are engaged in the groove, and the depth of the rollers entering the groove reaches more than four-fifths of the total depth of the groove, to prevent the bottom gate from being accidentally opened during the lifting process.

[0010] Preferably, in step 4, check that the APS clamping arm is not deformed, and that the foundation is not loose or cracked; confirm that the APS oil pump operates without abnormal noise, that the oil level in the oil tank is above 2 / 3 of the total height of the oil tank, that the oil temperature is maintained at 35-40℃, and that there is no oil leakage or pressure relief in the oil cylinder and the reversing valve, so as to ensure that the APS clamping force is stable and prevent the trolley from shifting.

[0011] Preferably, in step 4, it is confirmed that the hook of the dry quenching coke elevator enters the center of the coke can lifting lug normally, the distance between the hook on the north and south sides and the edge of the lifting lug is not less than 10mm, and this alignment status is consistent with the signal in the central control room; it is confirmed that the upper and lower crossbeams of the lifting device are kept horizontally balanced and without tilting.

[0012] Preferably, in step 4, the following checks are performed: the wire rope of the dry quenching coke elevator is checked to ensure it is not loose or detached from the groove; the main connector bolts are not loose or misaligned, and the internal and external teeth are not dislodged; the brake pads are free of debris and have normal clearance; the electro-hydraulic brake head and brake disc are at normal temperatures; and the PLC signal feedback in the driver's cab is normal.

[0013] The beneficial effects of the method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, provided by the present invention, are as follows: Compared with the prior art, the present invention achieves full-dimensional safety verification covering coke cans, trolleys, APS systems, lifting tools, and the elevator body. It has formulated quantitative verification standards for each key component (such as idler roller depth, plate hook gap, oil level and oil temperature), completely eliminating the safety blind spots of manual operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart illustrating a method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as provided in an embodiment of the present invention. Detailed Implementation

[0016] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0017] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Please see Figure 1 A method for confirming the switch to manual operation in case of a dry quenching elevator malfunction, including: Step 1: The central control unit and on-site personnel work together to confirm the fault alarm information, status signals, position, and load status of the dry quenching elevator, and complete the initial collection of fault information. Step 2: Immediately send a warning instruction to the locomotive driver prohibiting the movement of the vehicle, and at the same time notify the shift leader and inspection worker to come to the scene to check and confirm the type and location of the dry quenching elevator malfunction. Step 3: Switch all control circuits of the dry quenching elevator, APS oil pump, and loading device to the disconnect position. After initially confirming safety, switch to manual operation mode. Step 4: Complete the inspection of each risk point of the dry quenching elevator in sequence according to the preset priority; Step 5: After all the verification items are confirmed to be correct, perform a manual trial run in low speed mode first. After confirming that there are no abnormalities in the low speed operation, gradually increase the speed. During the manual operation, the operator in the central control room and the on-site inspector should maintain real-time communication and constantly check the operating signal of the dry quenching coke elevator and the lifting height position of the coke pot to ensure that the signals of the central control room and the field are consistent in real time.

[0018] Furthermore, this invention primarily ensures equipment and personnel safety and avoids major accidents by implementing a confirmation method before automatically switching the dry quenching coke elevator to manual operation. The specific operation is as follows: 1. Central control and on-site personnel confirm the hoist fault alarm name, hoist signal, hoist location, and whether there is a heavy tank, etc.

[0019] 2. Inform the locomotive driver that the hoist has reported a malfunction and that the vehicle should not be moved. Inform the shift leader and inspection workers to check and confirm all signals on-site, and confirm the following malfunctions: the hoist reports a malfunction but does not move; the APS does not clamp after the locomotive is aligned; the coke tank does not rotate properly and the hoist does not move; vehicle and central control signals are missing; a malfunction occurs during coke tank rotation; or there is an off-center load.

[0020] 3. Switch all critical equipment, such as the hoist, APS oil pump, and loading device, to the off position. After confirming that everything is normal, operate manually.

[0021] 4. On-site inspection confirms that the coke tank has rotated into place, the pallet triangle is in the center position, and the signal matches the locomotive signal; check that the coke tank trolley is properly aligned, the locomotive coke tank trolley is properly aligned with the ground clamping device, and the vehicle alignment signal is complete.

[0022] 5. Check and confirm that all four rollers of the coke oven bottom gate are in the groove and have entered at least four-fifths of the groove. Each of the four rollers must be checked one by one.

[0023] 6. Check and confirm that the APS clamping arm is normal, the foundation is not loose or cracked, the APS oil pump is running normally without abnormal noise, the oil level in the APS oil tank is above 2 / 3, the oil temperature is 35-40 degrees, and there is no oil leakage or pressure relief in the oil cylinder and reversing valve.

[0024] 7. Check and confirm that the plate hook is properly positioned in the center of the lifting lug (the north and south plate hook positions should not be within 10mm of the edge of the lifting lug) and that it matches the signal from the central control room.

[0025] 8. Check and confirm that the upper and lower crossbeams of the lifting device are balanced.

[0026] 9. Check and confirm that the wire rope is not loose or has not derailed.

[0027] 10. Check and confirm that the main connecting bolts of the hoist are normal, with no loosening or movement, and that the internal and external teeth are not separated.

[0028] 11. Check and confirm that the brake pads are free of debris and have normal clearance, and that the electro-hydraulic brake head and brake disc are at normal temperature.

[0029] 12. Check and confirm that the PLC signal feedback in the driver's cab is normal.

[0030] 13. After confirming that all the above information is correct, first perform manual low-speed operation. If there are no abnormalities at low speed, you can switch to high-speed operation. During manual operation, the operator in the central control room and the on-site inspector should maintain smooth communication, pay close attention to the accuracy of the operation of each signal of the hoist, the accuracy of the coke tank lifting height and position, etc., and contact each other at any time to confirm that the signals of the central control room and all parts of the site are consistent and normal.

[0031] 14. After the system returns to normal, and the manual operation test is successful, you can switch to automatic operation and report to the relevant personnel.

[0032] This invention achieves comprehensive safety verification covering coke ovens, trolleys, APS systems, lifting devices, and the hoist body. It has established quantitative verification standards for each key component (such as idler roller depth, plate hook gap, oil level and oil temperature), completely eliminating the safety blind spots of manual operation.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for confirming before switching to manual in case of failure of a dry quenching hoist, characterized by, include: Step 1: The central control unit and on-site personnel work together to confirm the fault alarm information, status signals, position, and load status of the dry quenching elevator, and complete the initial collection of fault information. Step 2: Immediately send a warning instruction to the locomotive driver prohibiting the movement of the vehicle, and at the same time notify the shift leader and inspection worker to come to the scene to check and confirm the type and location of the dry quenching elevator malfunction. Step 3: Switch all control circuits of the dry quenching elevator, APS oil pump, and loading device to the disconnect position. After initially confirming safety, switch to manual operation mode. Step 4: Complete the inspection of each risk point of the dry quenching elevator in sequence according to the preset priority; Step 5: After all the verification items are confirmed to be correct, perform a manual trial run in low speed mode first. After confirming that there are no abnormalities in the low speed operation, gradually increase the speed. During the manual operation, the operator in the central control room and the on-site inspector should maintain real-time communication and constantly check the operating signal of the dry quenching coke elevator and the lifting height position of the coke pot to ensure that the signals of the central control room and the field are consistent in real time.

2. The method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as described in claim 1, is characterized in that... In step 2, the types of faults investigated include at least one of the following: the dry quenching elevator not operating, the APS not clamping after the locomotive is aligned, the coke can not rotating properly, causing the dry quenching elevator to not operating, missing vehicle and central control signals, coke can rotation fault, and coke can uneven loading.

3. The method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as described in claim 1, is characterized in that... In step 4, check and confirm that the coke tank has rotated into place, the pallet triangle is in the center position, and is consistent with the feedback signal from the locomotive; confirm that the coke tank trolley is properly aligned with the ground clamping device and that the vehicle alignment signal is complete.

4. The method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as described in claim 3, is characterized in that... In step 4, check and confirm that all four rollers of the coke tank bottom gate are engaged in the grooves, and that the rollers are inserted into the grooves to a depth of more than four-fifths of the total depth of the grooves, to prevent the bottom gate from opening accidentally during the lifting process.

5. The method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as described in claim 4, is characterized in that... In step 4, check that the APS clamping arm is not deformed and that the foundation is not loose or cracked; confirm that the APS oil pump is running without abnormal noise, the oil level in the oil tank is above 2 / 3 of the total height of the oil tank, the oil temperature is maintained at 35-40℃, and there is no oil leakage or pressure relief in the oil cylinder and reversing valve, so as to ensure the stability of the APS clamping force and prevent the trolley from shifting.

6. The method for confirming the operation before switching to manual mode when a dry quenching coke elevator malfunctions, as described in claim 5, is characterized in that... In step 4, confirm that the hook of the dry quenching coke elevator is normally in the center of the coke tank lifting lug, the distance between the hook on the north and south sides and the edge of the lifting lug is not less than 10mm, and this alignment status is consistent with the signal in the central control room; confirm that the upper and lower crossbeams of the lifting device are horizontally balanced and without tilting.

7. The method for confirming the operation before switching to manual mode when a dry quenching elevator malfunctions, as described in claim 6, is characterized in that... In step 4, check that the wire rope of the dry quenching coke elevator is not loose or has come off the groove; the main connector bolts are not loose or moving, and the inner and outer teeth are not separated; the brake pads are free of slag and have normal gaps; the electro-hydraulic brake head and brake disc are at normal temperatures; and the PLC signal feedback in the driver's cab is normal.

Images