Switching standby system and switching method for ladle turret large tank sliding plate hydraulic cylinder

Abstract

The invention discloses a ladle turret large tank sliding plate hydraulic cylinder switching standby system and a switching method, relates to the technical field of continuous casting machinery, and aims to solve the problems that when an existing ladle turret sliding gate main hydraulic station breaks down, a large tank sliding plate cannot be normally operated, so that safety accidents such as pouring stop and molten steel overflow are caused, and the production cost is increased. The system comprises a main hydraulic station, an original hydraulic cylinder, an independently arranged standby hydraulic station, a three-way pipeline and a manual ball valve, one end of the three-way pipeline is connected with the original hydraulic cylinder, the other end of the three-way pipeline is connected with the main hydraulic station and the standby hydraulic station, and the manual ball valve is arranged at the connecting front end of the three-way pipeline and the main hydraulic station; the switching method comprises the steps of fault judgment, main oil way cutting off, standby hydraulic station starting, sliding plate driving operation and the like. The standby system can be rapidly switched when the main hydraulic station breaks down, continuous casting production continuity is guaranteed, the standby system is simple in structure, time is reserved for overhauling of an original system, and safety risks and production cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of continuous casting machinery technology, specifically to a switching backup system for the hydraulic cylinder of the ladle turret slide plate and the corresponding switching method. It is applicable to emergency handling of malfunctions in the drive system of the ladle turret slide plate during continuous casting production, ensuring the continuity and safety of molten steel pouring. Background Technology

[0002] In the continuous casting production process, the ladle turret is a key piece of equipment connecting steelmaking and continuous casting. The large ladle (molten steel ladle) it carries achieves precise delivery of molten steel to the tundish through a sliding gate. The opening and closing of the sliding gate is mainly completed by the hydraulic cylinder driven by the sliding gate hydraulic station. Therefore, the stable operation of the main hydraulic station directly determines the continuity and safety of continuous casting production.

[0003] However, in the existing technology, the large ladle slide drive system of the ladle turret relies on a single main hydraulic station for power, which has significant drawbacks: when the main hydraulic station fails due to problems such as hydraulic pump failure, valve blockage, or pipeline leakage, the large ladle slide will lose power drive; if the slide is closed, molten steel cannot flow into the tundish, which will directly lead to a casting stoppage, causing production line shutdown, molten steel cooling and scrapping, and other economic losses; if the slide is open, molten steel will continuously flow into the tundish, exceeding the tundish capacity and causing molten steel overflow, which will not only burn the conveyor rollers, tundish frame and other equipment, but may also cause safety accidents such as burns to personnel, greatly increasing production risks and maintenance costs.

[0004] Based on this, after searching, application number CN201910026149.X discloses an automatic switching hydraulic system for oil supply of hydraulic cylinders for large package sliding gates, which aims to overcome the problems of being unable to quickly handle faults and being unable to achieve production unaffected by faults; the main system's independent oil source I is connected to ball valve II, ball valve II is connected to pressure reducing valve I, and pressure reducing valve I is connected to the sliding gate control device.

[0005] The aforementioned system lacks an effective emergency plan to address this issue and cannot quickly restore the driving capability of the large tank slide plate when the main hydraulic station fails. Therefore, a backup hydraulic system and operating method that can achieve rapid switching is needed to solve the above-mentioned technical pain points.

[0006] To address the aforementioned issues, a backup system and switching method for the hydraulic cylinder switching of the large tank slide plate on the large package rotary table are proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a backup system and method for switching the hydraulic cylinders of the ladle turret slide plate. Addressing the problem that existing ladle turret slide plate drive systems rely on a single main hydraulic station, which can easily lead to casting stoppages, safety accidents, and increased costs in the event of a failure, this invention provides a backup system and method for switching the hydraulic cylinders of the ladle turret slide plate. This enables rapid emergency switching in the event of a main hydraulic station failure, ensuring normal operation of the ladle slide plate, maintaining continuous continuous casting production, and simultaneously allowing time for maintenance of the original system.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a backup system for switching hydraulic cylinders on a large tank slide plate of a large cargo turntable, comprising a metal hose, a high-pressure ball valve, a pressure testing hose, a stacked one-way throttle valve, a stacked hydraulic control one-way valve, a two-position four-way solenoid directional valve, a three-position four-way solenoid directional valve, an electric motor, a constant-pressure variable displacement piston pump, a pipeline filter, an overflow valve, and a control module, characterized in that: a main hydraulic station is used to provide hydraulic power to the original hydraulic cylinder of the large cargo turntable to drive the large tank slide plate to open or close; the original hydraulic cylinder is connected to the large tank slide plate and receives hydraulic power to realize the slide plate movement; a backup hydraulic station is set independently of the main hydraulic station and includes a hydraulic pump, a valve platform, a solenoid directional valve assembly, an electric motor, a constant-pressure variable displacement piston pump, a pipeline filter, and an overflow valve, used to provide temporary hydraulic power to the original hydraulic cylinder when the main hydraulic station fails; a three-way pipeline, the first port of which is connected to the inlet end of the original hydraulic cylinder, the second port of which is connected to the outlet end of the main hydraulic station, and the third port of which is connected to the outlet end of the backup hydraulic station.

[0009] Preferably, the electromagnetic directional valve assembly includes a two-position four-way electromagnetic directional valve and a three-position four-way electromagnetic directional valve for controlling the basic flow direction of hydraulic oil. The three-position four-way electromagnetic directional valve is used to achieve emergency closure of the large tank slide plate in case of an accident.

[0010] The design of the above structure can accurately control the flow of hydraulic oil to meet the normal operation requirements of the skateboard, while in an emergency it can quickly shut down the skateboard to avoid accidents such as molten steel spillage.

[0011] Preferably, the backup hydraulic station further includes a stacked one-way throttle valve and a stacked hydraulically controlled one-way valve.

[0012] The above-mentioned design allows for the regulation of hydraulic oil flow through a throttle valve, stabilizing the hydraulic cylinder's operating speed. It also prevents oil backflow using a hydraulically controlled check valve, ensuring the slide plate position is locked and improving operational stability.

[0013] Preferably, the hydraulic cylinder switching backup system further includes a metal hose and a pressure testing hose.

[0014] With the above-described structure, the metal hose can absorb equipment vibration and protect the pipeline from damage; the pressure testing hose can monitor oil pressure in real time, allowing operators to promptly grasp the system's operating status and troubleshoot abnormalities.

[0015] Preferably, the hydraulic pump in the backup hydraulic station is a constant pressure variable displacement piston pump; the electric motor is connected to the hydraulic pump to provide power for the operation of the hydraulic pump; a manual ball valve is installed on the pipeline between the second port of the three-way pipe and the main hydraulic station, and is used to cut off the oil circuit between the main hydraulic station and the original hydraulic cylinder when the main hydraulic station fails; the manual ball valve is a high-pressure ball valve, which can withstand the high pressure when the hydraulic system is working and ensure the sealing when the oil circuit is cut off.

[0016] With the above-mentioned design, the constant pressure variable piston pump can stably supply pressure to meet the requirements, the electric motor provides reliable power, and the high-pressure ball valve can completely cut off the main oil circuit, avoiding the impact of the main station failure on the backup system and ensuring the independent operation of the backup system.

[0017] Preferably, the valve platform of the backup hydraulic station is further provided with a stacked one-way throttle valve, a stacked hydraulic control one-way valve, and a pipeline filter; the pipeline filter is located at the oil inlet end of the backup hydraulic station and is used to filter impurities in the hydraulic oil.

[0018] With the above-mentioned design, the filter can remove impurities from the oil, protect the valve assembly and pump body, and, together with the throttle valve and hydraulic check valve, further improve the cleanliness and operational reliability of the standby station oil circuit.

[0019] Preferably, the superimposed one-way throttle valve is used to regulate the flow rate of hydraulic oil and control the operating speed of the original hydraulic cylinder; the superimposed hydraulic control one-way valve is used to prevent hydraulic oil backflow and lock the position of the original hydraulic cylinder.

[0020] The above-mentioned structural design can prevent the slide from moving too quickly or shifting its position, ensuring accurate steel delivery and reducing the risks caused by operational errors.

[0021] Preferably, the tee pipe is connected to the original hydraulic cylinder, the main hydraulic station, and the backup hydraulic station via a metal flexible hose to absorb vibrations during equipment operation and prevent pipe damage; it also includes a pressure testing hose connected to the oil circuit of the backup hydraulic station to monitor the oil pressure of the backup hydraulic station in real time so that operators can monitor the system's operating status.

[0022] The above-mentioned structural design can not only extend the service life of the pipeline, but also monitor the oil pressure of the backup system in real time, ensuring system stability and facilitating timely adjustments.

[0023] Preferably, a method for rapid switching of hydraulic cylinders for large tank slides on a large cargo turntable includes the following steps:

[0024] S1: Fault diagnosis, real-time monitoring of the main hydraulic station's operating status. When a fault occurs in the main hydraulic station, causing the large tank slide plate to fail to open or close normally, it is determined that a backup switching process needs to be initiated. The pressure value of the main hydraulic station's output pipeline is monitored through a pressure testing hose. When the pressure value is lower than the preset working pressure range, it is determined that the main hydraulic station is faulty.

[0025] S2: Cut off the main oil circuit. The operator manually closes the manual ball valve installed between the second port of the three-way pipe and the main hydraulic station to block the fluid supply path from the main hydraulic station to the original hydraulic cylinder, so as to prevent the failure in the main hydraulic station from affecting the standby system.

[0026] S3: Start the standby hydraulic station. Start the electric motor of the standby hydraulic station to drive the constant pressure variable piston pump to run. The hydraulic oil enters the valve platform after being filtered by the pipeline filter. After the standby hydraulic station is started, ensure that the driving force of the original hydraulic cylinder meets the operation requirements of the large tank slide plate.

[0027] S4: Drive the sliding plate operation. The hydraulic oil flow direction is adjusted by controlling the two-position four-way solenoid valve of the backup hydraulic station. The hydraulic oil enters the original hydraulic cylinder through the three-way pipe and metal hose, driving the large tank sliding plate to complete the opening or closing action. In case of emergency, the large tank sliding plate can be closed in case of emergency through the three-position four-way solenoid valve.

[0028] S5: During the maintenance of the original system and while the backup hydraulic station is maintaining production, the faulty main hydraulic station is repaired. After the repair is completed, step SS is executed in reverse to restore the fluid supply to the main hydraulic station. The oil pressure is monitored in real time through the pressure testing hose to ensure stable system operation. At the same time, the faulty main hydraulic station is repaired.

[0029] S6: After the main hydraulic station is repaired and passes inspection, shut down the backup hydraulic station, open the manual ball valve, restore the power supply of the main hydraulic station to the original hydraulic cylinder, and the system switches back to normal operation.

[0030] The design using the above method can quickly complete the switching between the main and backup systems, reduce downtime, ensure continuous production, and at the same time reserve sufficient time for the maintenance of the faulty main station, thereby reducing economic losses and safety risks.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The backup system and switching method for the hydraulic cylinder of the ladle rotary table and large tank slide plate proposed in this application can complete the power switching in the event of a main hydraulic station failure by simply closing the manual ball valve and starting the backup hydraulic station. This allows for a quick backup system switchover, rapidly restoring the driving capability of the large tank slide plate, avoiding casting stoppages, maintaining continuous casting production, reducing economic losses, and ensuring production continuity.

[0033] 2. When the main hydraulic station fails and the slide cannot be closed, starting the backup hydraulic station can quickly control the slide to close, preventing molten steel from overflowing, avoiding safety accidents such as equipment burns and personnel burns, reducing the risk of equipment burns and personnel safety, and improving operational safety.

[0034] 3. The backup hydraulic station retains only the core functional components, and its structure is simpler than that of the main hydraulic station. This not only reduces the equipment manufacturing and maintenance costs, but also reduces the number of failure points and improves the reliability of the backup system itself. At the same time, the use of mature components such as high-pressure ball valves, metal hoses, and pipeline filters further ensures the stable operation of the system. It is small in size, easy to install, does not require large-scale modification of the main turntable, has lower costs, and simplifies the backup system structure.

[0035] 4. The backup system of this invention can operate stably for a long time, providing maintenance personnel with sufficient time to troubleshoot and repair the main hydraulic station faults, avoiding secondary faults caused by hasty maintenance. The components of the backup hydraulic station are all standardized parts, which are easy to replace when they fail. Daily maintenance only requires periodically checking the ball valve sealing, replacing the filter element, and replenishing the hydraulic oil. The maintenance workload is small, allowing time for maintenance.

[0036] 5. The design of this system does not require modification of the original main hydraulic station and hydraulic cylinders. It can be connected to the original system simply by adding a three-way pipe, a manual ball valve and a backup hydraulic station. It is suitable for ladle rotary tables of different specifications and models, has strong compatibility, and is easy to promote and apply on existing continuous casting production lines. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the hydraulic cylinder switching backup system for the large tank slide plate on the large package rotary table of the present invention;

[0038] Figure 2 This is a flowchart of the hydraulic cylinder switching method for the large tank slide plate on the large package rotary table according to the present invention.

[0039] 1. Metal flexible hose; 2. High-pressure ball valve; 3. Pressure testing hose; 4. Stacked one-way throttle valve; 5. Stacked hydraulic check valve; 6. Two-position four-way solenoid directional valve; 7. Three-position four-way solenoid directional valve; 8. Electric motor; 9. Constant pressure variable displacement piston pump; 10. Pipeline filter; 11. Relief valve. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0042] Combination Figures 1-2 This document describes a system and method for switching the hydraulic cylinders of a large tank slide plate on a large cargo turntable. The system includes a metal hose 1, a high-pressure ball valve 2, a pressure testing hose 3, a stacked one-way throttle valve 4, a stacked hydraulic control check valve 5, a two-position four-way solenoid directional valve 6, a three-position four-way solenoid directional valve 7, an electric motor 8, a constant-pressure variable displacement piston pump 9, a pipeline filter 10, an overflow valve 11, and a control module. Its key feature is a main hydraulic station, used to provide hydraulic power to the original hydraulic cylinders of the large cargo turntable, driving the large tank slide plate. The plate opens or closes; the original hydraulic cylinder is connected to the sliding plate of the large tank and receives hydraulic power to realize the sliding plate movement; the backup hydraulic station is set independently of the main hydraulic station and includes a hydraulic pump, valve platform, solenoid directional valve assembly, electric motor 8, constant pressure variable piston pump 9, pipeline filter 10 and relief valve 11, which is used to provide temporary hydraulic power to the original hydraulic cylinder when the main hydraulic station fails; a three-way pipeline, the first port of which is connected to the inlet end of the original hydraulic cylinder, the second port of which is connected to the outlet end of the main hydraulic station, and the third port of which is connected to the outlet end of the backup hydraulic station.

[0043] The present invention will be further described below with reference to embodiments.

[0044] Example 1:

[0045] The electromagnetic directional valve assembly includes a two-position four-way electromagnetic directional valve 6 and a three-position four-way electromagnetic directional valve 7. The two-position four-way electromagnetic directional valve 6, model DN10, is used to control the basic flow direction of hydraulic oil, while the three-position four-way electromagnetic directional valve 7 is used to achieve emergency closure of the large tank slide plate in case of an accident. The backup hydraulic station also includes a stacked one-way throttle valve 4 and a stacked hydraulic control one-way valve 5. The hydraulic cylinder switching backup system also includes a metal hose 1 and a pressure testing hose 3. The hydraulic pump in the backup hydraulic station is a constant pressure variable displacement piston pump 9. The electric motor 8 is connected to the hydraulic pump to provide power for the operation of the hydraulic pump. A manual ball valve is installed on the pipeline between the second port of the three-way pipe and the main hydraulic station, used to cut off the oil circuit between the main hydraulic station and the original hydraulic cylinder when the main hydraulic station fails. The manual ball valve is a high-pressure ball valve, capable of withstanding the high pressure during the operation of the hydraulic system, ensuring the sealing when the oil circuit is cut off.

[0046] Example 2:

[0047] The standby hydraulic station is also equipped with a stacked one-way throttle valve 4, a stacked hydraulic control one-way valve 5, and a pipeline filter 10. The pipeline filter 10 is located at the oil inlet of the standby hydraulic station and is used to filter impurities in the hydraulic oil. The stacked one-way throttle valve 4 is used to regulate the flow rate of the hydraulic oil and control the action speed of the original hydraulic cylinder. The stacked hydraulic control one-way valve 5 is used to prevent hydraulic oil backflow and lock the position of the original hydraulic cylinder. The three-way pipe is connected to the original hydraulic cylinder, the main hydraulic station, and the standby hydraulic station through a metal hose 1 to absorb vibrations during equipment operation and prevent pipeline damage. It also includes a pressure testing hose 3, which is connected to the oil circuit of the standby hydraulic station to monitor the oil pressure of the standby hydraulic station in real time so that the operator can understand the system operating status.

[0048] Example 3:

[0049] A method for rapid switching of hydraulic cylinders for large tank slides on a large cargo turntable includes the following steps:

[0050] S1: Fault diagnosis, real-time monitoring of the main hydraulic station's operating status. When the main hydraulic station malfunctions and causes the large tank slide plate to fail to open or close normally, it is determined that the backup switching process needs to be initiated. In step S1, the pressure value of the main hydraulic station's output pipeline is monitored through the pressure testing hose 3. When the pressure value is lower than the preset working pressure range, it is determined that the main hydraulic station is faulty.

[0051] S2: Cut off the main oil circuit. The operator manually closes the manual ball valve installed between the second port of the three-way pipe and the main hydraulic station to block the fluid supply path from the main hydraulic station to the original hydraulic cylinder, so as to prevent the failure in the main hydraulic station from affecting the standby system.

[0052] S3: Start the backup hydraulic station. Start the motor 8 of the backup hydraulic station to drive the constant pressure variable piston pump 9 to run. The hydraulic oil enters the valve platform after being filtered by the pipeline filter 10. In step S3, after the backup hydraulic station is started, the pressure in the pipeline is stabilized at 15-20MPa through the relief valve 11 to ensure that the driving force of the original hydraulic cylinder meets the operation requirements of the large tank slide plate.

[0053] S4: Drive the sliding plate operation. The hydraulic oil flow direction is adjusted by controlling the two-position four-way solenoid valve 6 of the backup hydraulic station. The hydraulic oil enters the original hydraulic cylinder through the three-way pipe and metal hose 1, driving the large tank sliding plate to complete the opening or closing action. In case of emergency, the large tank sliding plate can be closed in case of emergency through the three-position four-way solenoid valve 7.

[0054] S5: During the maintenance of the original system and while the backup hydraulic station is maintaining production, the faulty main hydraulic station is repaired. After the repair is completed, steps S2-S3 are executed in reverse to restore the fluid supply to the main hydraulic station. The oil pressure is monitored in real time through the pressure testing hose 3 to ensure stable system operation. At the same time, the faulty main hydraulic station is repaired.

[0055] S6: After the main hydraulic station is repaired and passes inspection, shut down the backup hydraulic station, open the manual ball valve, restore the power supply of the main hydraulic station to the original hydraulic cylinder, and the system switches back to normal operation.

[0056] In summary, the working principle is as follows: When the main hydraulic station is running normally, the manual ball valve is in the open position. The main hydraulic station provides hydraulic power to the original hydraulic cylinder through the three-way pipe, controlling the normal movement of the large tank slide plate. At this time, the standby hydraulic station is in standby mode and does not participate in power supply. When the main hydraulic station malfunctions, such as pump damage, valve blockage, or oil leakage, and cannot provide power to the hydraulic cylinder, the system switching process is as follows: 1. Fault diagnosis and shutdown: The operator observes through the production monitoring system or on-site. If the slide plate cannot move or the oil pressure gauge shows no reading, and a fault is found in the main hydraulic station, the operation of the main hydraulic station is immediately stopped to prevent the fault from escalating. 2. Cut off the main oil circuit: The operator quickly goes to the front end of the three-way pipe connecting to the main hydraulic station, manually rotates the handle of the high-pressure ball valve to close the ball valve, cutting off the oil circuit between the main hydraulic station and the original hydraulic cylinder, preventing faults in the main hydraulic station such as leakage or impurities from entering. 3. Start the backup hydraulic station: The operator starts the motor 8 of the backup hydraulic station. The motor 8 drives the constant pressure variable piston pump 9 to operate. The constant pressure variable piston pump 9 draws hydraulic oil from the oil tank. The hydraulic oil enters the valve platform after being filtered by the pipeline filter 10; 4. Control the sliding plate movement: According to production needs, the operator sends a command to the solenoid directional valve assembly of the backup hydraulic station through the control module; 5. If the large tank sliding plate needs to be opened: Control the corresponding coils of the two-position four-way solenoid directional valve 6 and the three-position four-way solenoid directional valve 7 to be energized. The valve core moves. After being regulated by the valve platform, the hydraulic oil flows into the rodless chamber of the original hydraulic cylinder through the three-way pipeline, pushing the piston out and driving the large tank sliding plate to open; If the large tank sliding plate needs to be closed: Control the other set of coils of the solenoid directional valve assembly to be energized. The valve core moves in the opposite direction. The hydraulic oil flows into the rod chamber of the original hydraulic cylinder, pushing the piston back and driving the large tank sliding plate to close.

[0057] During the sliding motion, the stacked one-way throttle valve 4 regulates the hydraulic oil flow to ensure smooth sliding motion; the stacked hydraulic control one-way valve 4 prevents hydraulic oil backflow and ensures that the sliding plate remains stable when the motion stops; during the operation of the standby hydraulic station, the operator monitors the oil circuit pressure in real time through the pressure gauge connected to the pressure measuring hose 3 to ensure that the pressure is within the set range. If the pressure is abnormal, the pump, valve, pipeline and other components are checked in time and the fault is eliminated. At the same time, the maintenance personnel carry out emergency repairs on the faulty main hydraulic station, such as replacing the damaged pump, cleaning the valve group, and repairing the leaking pipeline.

[0058] After the main hydraulic station is repaired, the maintenance personnel will conduct pressure and motion tests on the main hydraulic station to confirm that the main hydraulic station has returned to normal function. Then, the operator will first shut off the motor 8 of the standby hydraulic station to stop the power supply to the standby system. Then, the operator will slowly open the manual ball valve to restore the oil circuit between the main hydraulic station and the hydraulic cylinder. Finally, the operator will start the main hydraulic station, and the system will switch back to the main hydraulic station drive mode. The standby hydraulic station will then enter standby mode again, waiting to be activated in case of the next failure.

[0059] Taking the ladle rotary table in the continuous casting workshop of a steel plant as an example, its ladle capacity is 150t. During normal production, the pressure of the main hydraulic station is stable at 18MPa. The specific working process is as follows: the high-pressure ball valve 2 is in the open state, and the hydraulic oil output by the main hydraulic station enters the original hydraulic cylinder through the three-way pipe and metal hose 1, driving the ladle slide to open or close according to the production rhythm. The pressure monitoring hose 3 monitors the pressure at 18MPa, and the standby hydraulic station is in the standby state.

[0060] Fault occurred: One day, the hydraulic pump shaft of the main hydraulic station broke, and the pressure suddenly dropped to 5MPa for 8 seconds. The operator observed the abnormal pressure through the pressure gauge in the control cabinet and determined that the main hydraulic station was faulty. At this time, the slide plate of the large tank was in the open state, and molten steel was flowing into the tundish. It was necessary to immediately maintain the normal closing function of the slide plate.

[0061] Switching operation: The operator first reaches the high-pressure ball valve 2 position, closes the ball valve, presses the standby hydraulic station start button, the motor 8 runs, and then the constant pressure variable piston pump 9 outputs pressure to 18MPa, and the relief valve 11 stabilizes the pressure.

[0062] When the tundish is about to be full of molten steel, the operator sends a shutdown signal through the control cabinet. The two-position four-way solenoid valve 6 is energized, and hydraulic oil enters the rod chamber of the original hydraulic cylinder. The slide plate slowly closes, thus completing the normal steel stop.

[0063] During the operation of the standby hydraulic station, maintenance personnel replace the hydraulic pump of the main hydraulic station. After the maintenance is completed, the main hydraulic station is started, and the pressure is monitored to return to 18MPa. The high-pressure ball valve 2 is opened, the standby hydraulic station is shut down, and normal production is resumed.

[0064] It should be noted that the aforementioned electrical components are equipped with power supplies, and their control methods are existing technologies. To avoid redundancy, they will be described here uniformly. Furthermore, this application is primarily for the protection of mechanical equipment, so the control methods and circuit connections will not be explained in detail herein. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large bag rotary table large tank sliding plate hydraulic cylinder switching standby system, comprising a metal hose (1), a high-pressure ball valve (2), a pressure measuring hose (3), a superimposed one-way throttle valve (4), a superimposed hydraulic control one-way valve (5), a two-position four-way electromagnetic reversing valve (6), a three-position four-way electromagnetic reversing valve (7), an electric motor (8), a constant pressure variable plunger pump (9), a pipeline filter (10), an overflow valve (11) and a control module, characterized in that: The main hydraulic station is used for providing hydraulic power for the original hydraulic cylinder of the large pot rotary table to drive the large pot slide plate to open or close; the original hydraulic cylinder is in transmission connection with the large pot slide plate and receives the hydraulic power to realize the slide plate action; the standby hydraulic station is independently arranged from the main hydraulic station and includes a hydraulic pump, a valve table, an electromagnetic reversing valve assembly, an electric motor (8), a constant pressure variable plunger pump (9), a pipeline filter (10) and an overflow valve (11) and is used for providing temporary hydraulic power for the original hydraulic cylinder when the main hydraulic station fails; the three-way pipeline has a first port in communication with the liquid inlet end of the original hydraulic cylinder, a second port in communication with the liquid outlet end of the main hydraulic station and a third port in communication with the liquid outlet end of the standby hydraulic station.

2. The large rotary table large tank slide plate hydraulic cylinder switching backup system according to claim 1, characterized in that: The electromagnetic reversing valve assembly includes a two-position four-way electromagnetic reversing valve (6) and a three-position four-way electromagnetic reversing valve (7), the two-position four-way electromagnetic reversing valve (6) is of DN10 type and is used for controlling the basic flow direction of the hydraulic oil, and the three-position four-way electromagnetic reversing valve (7) is used for realizing the emergency closing of the large pot slide plate in the accident state.

3. The large rotary table large tank slide plate hydraulic cylinder switching backup system according to claim 1, characterized in that: The standby hydraulic station further includes a superimposed one-way throttle valve (4) and a superimposed hydraulic control one-way valve (5).

4. The large rotary table large tank slide plate hydraulic cylinder switching backup system according to claim 1, characterized in that: The hydraulic cylinder switching standby system further includes a metal hose (1) and a pressure measuring hose (3).

5. The large rotary table large tank slide hydraulic cylinder switching backup system according to claim 1, characterized in that: The hydraulic pump in the standby hydraulic station is a constant pressure variable plunger pump (9); the electric motor (8) is connected with the hydraulic pump and provides power for the operation of the hydraulic pump; a manual ball valve is installed on the pipeline between the second port of the three-way pipeline and the main hydraulic station and is used for cutting off the oil path between the main hydraulic station and the original hydraulic cylinder when the main hydraulic station fails; the manual ball valve is a high-pressure ball valve and can withstand the high pressure in the hydraulic system working to ensure the sealing when the oil path is cut off.

6. The large rotary table large tank slide hydraulic cylinder switching backup system according to claim 1, characterized in that: The valve table of the standby hydraulic station is further provided with a superimposed one-way throttle valve (4), a superimposed hydraulic control one-way valve (5) and a pipeline filter (10); the pipeline filter (10) is arranged at the oil inlet end of the standby hydraulic station and is used for filtering the impurities in the hydraulic oil.

7. The large rotary table large tank slide hydraulic cylinder switching backup system according to claim 1, characterized in that: The superimposed one-way throttle valve (4) is used for adjusting the flow of the hydraulic oil and controlling the action speed of the original hydraulic cylinder; and the superimposed hydraulic control one-way valve (5) is used for preventing the backflow of the hydraulic oil and locking the position of the original hydraulic cylinder.

8. The large rotary table large tank slide hydraulic cylinder switching backup system according to claim 1, characterized in that: The three-way pipeline is connected with the original hydraulic cylinder, the main hydraulic station and the standby hydraulic station through the metal hose (1) and is used for absorbing the vibration in the equipment running process to avoid pipeline damage; and further includes a pressure measuring hose (3), the pressure measuring hose (3) is connected in the oil path of the standby hydraulic station and is used for monitoring the oil pressure in the standby hydraulic station working in real time so that the operating personnel can master the system running state.

9. A method for quick switching of the hydraulic cylinder of the large ladle slide gate of the large ladle turret, applied to the system of any one of claims 1-8, characterized in that, The method comprises the following steps: S1: fault judgment, the running state of the main hydraulic station is monitored in real time, when the main hydraulic station fails to normally open or close the large pot slide plate, it is determined that the standby switching process needs to be started; S2: cutting off the main oil path, the operating personnel manually closes the manual ball valve installed between the second port of the three-way pipeline and the main hydraulic station to block the liquid supply path of the main hydraulic station to the original hydraulic cylinder to prevent the failure of the main hydraulic station from affecting the standby system; S3: Start the standby hydraulic station, start the motor (8) of the standby hydraulic station, drive the constant pressure variable plunger pump (9) to operate, and the hydraulic oil is filtered through the pipeline filter (10) and then enters the valve platform; S4: Drive the slide plate operation, adjust the hydraulic oil flow direction by controlling the two-position four-way electromagnetic reversing valve (6) of the standby hydraulic station, and the hydraulic oil enters the original hydraulic cylinder through the three-way pipeline and the metal hose (1) to drive the large tank slide plate to complete the opening or closing action; If an emergency occurs, the three-position four-way electromagnetic reversing valve (7) is used to realize the emergency closing of the large tank slide plate; S5: Original system maintenance, during the standby hydraulic station maintains production, the main hydraulic station is repaired, after the repair is completed, the steps S2-S3 are executed in reverse to restore the liquid supply of the main hydraulic station; The oil pressure is monitored in real time through the pressure measuring hose to ensure stable operation of the system, and the main hydraulic station is repaired; S6: When the main hydraulic station is repaired and detected, the standby hydraulic station is closed, the manual ball valve is opened, the power supply of the main hydraulic station to the original hydraulic cylinder is restored, and the system switches back to the normal operating state; In step S1, the pressure value of the main hydraulic station output pipeline is monitored through the pressure measuring hose, and when the pressure value is lower than the preset working pressure range, it is determined that the main hydraulic station is faulty; In step S3, after the standby hydraulic station is started, the pressure in the pipeline is stabilized at 15-20 MPa through the overflow valve (11), so that the driving force of the original hydraulic cylinder can meet the operation requirements of the large tank slide plate.

Images