Hydraulic system of movable crucible firing furnace

Abstract

The invention discloses a hydraulic system of a movable crucible firing furnace, belongs to the technical field of heavy equipment movement, and is used for driving a boiler protection outer cover to move between two furnace foundations along a rail. Comprising a hydraulic power module, a jacking and lowering execution component, a walking driving mechanism and an integrated control module. The walking driving mechanism comprises a plurality of supporting leg walking composite wheel assemblies which are directly connected with a supporting oil cylinder of the jacking and lowering execution component. The hydraulic power module supplies oil to each component through a pipeline; the integrated control module can sequentially control circulation of jacking, walking and lowering operation. Wherein the hydraulic power module is provided with an air filter and an oil return filter element device to form a cleaning and filtering system; the supporting leg walking composite wheel assembly integrates a driving wheel set, a driven wheel set and a walking hydraulic motor speed reducer, and the structure is compact. Synchronous jacking, stable walking and accurate lowering of the heavy-load outer cover are achieved, and the heavy-load outer cover jacking device has the advantages of being high in working efficiency, high in space adaptability, reliable in operation and long in service life.

Description

Technical Field

[0001] This invention relates to the field of heavy equipment mobility technology, and more specifically, to a hydraulic drive system for large industrial kilns, particularly suitable for a hydraulic system for lifting, moving, and lowering the boiler protective cover of a crucible firing furnace on a specific track. Background Technology

[0002] In the crucible firing process, to improve equipment utilization and production efficiency, a heavy-duty boiler protective cover weighing approximately 38 tons is typically moved back and forth between two parallel furnace bases via a pre-set track system. This allows a single cover to alternately serve two furnace bases, enabling continuous firing operations.

[0003] Existing technologies for moving such heavy equipment face the following main technical bottlenecks: First, before moving, the outer casing needs to be smoothly lifted and detached from the load-bearing furnace frame. This process requires multiple lifting actuators to have high synchronization precision; otherwise, the outer casing may tilt, jam, or rub against the furnace frame, damaging the equipment. Second, the driving mechanism after lifting needs to overcome the enormous load, provide sufficient and stable driving torque, and be able to adapt to potential flatness deviations in the track. Finally, the crucible firing workshop environment typically presents adverse factors such as temperature fluctuations and dust, requiring the hydraulic system to have good environmental adaptability and reliability.

[0004] The existing technology CN109281884A discloses a template synchronous hydraulic lifting control system, which uses a synchronous hydraulic motor to achieve high-precision synchronous lifting of two oil cylinders. However, its technical solution focuses entirely on vertical lifting operations and does not integrate any walking or moving functions, thus failing to address the technical requirement for long-distance track movement of the equipment after lifting. Therefore, its system has limited functionality and cannot be directly applied to crucible firing furnace scenarios that require a complete "lifting-walking-lowering" operation cycle.

[0005] Another existing technology, CN203754281U, discloses a device for lifting and sliding large objects. It possesses both lifting and traveling functions and uses a synchronous pump to control the hydraulic cylinders of four outriggers synchronously. However, this device typically has a complex structure, potentially employing independent lifting outriggers and traveling mechanisms. The system integration is low, resulting in a less compact overall structure that is difficult to adapt to the limited space at the bottom of the crucible firing furnace. Furthermore, this solution does not address specific hydraulic system protection and cleaning filtration designs for the working environment of the crucible firing furnace, such as high-temperature radiation and dust, potentially affecting the system's long-term operational stability and lifespan.

[0006] In summary, existing technologies lack a highly integrated hydraulic system specifically designed to meet the movement requirements of the protective cover for heavy-duty crucible firing furnaces. An ideal solution should seamlessly integrate high-tonnage synchronous lifting capabilities with reliable traversing and feeding functions, ensuring stable, safe, and efficient system operation in specific industrial environments. Summary of the Invention

[0007] To address the shortcomings of the existing technology, this invention aims to provide a hydraulic system for a mobile crucible firing furnace. The primary objective is to solve the technical challenge of ensuring the smooth and synchronous detachment and retraction of the heavy-duty boiler protective cover from the furnace frame during track movement, while achieving reliable travel. Specifically, this invention integrates lifting, traveling, and lowering functions into a compact hydraulic system, ensuring synchronized accuracy of multiple outriggers, providing sufficient lifting margin and traveling drive force, and enhancing the system's adaptability and reliability in industrial environments.

[0008] To address the aforementioned problems, this invention provides a hydraulic system for a mobile crucible firing furnace, used to drive a boiler protective cover to move along a track between two furnace bases. The system includes: a hydraulic power module, a lifting and lowering actuator, a traveling drive mechanism, and an integrated control module. The traveling drive mechanism includes multiple outrigger-driven composite wheel assemblies arranged at the bottom of the boiler protective cover for movement along the track. The telescopic end of the lifting and lowering actuator is connected to the outrigger-driven composite wheel assemblies. The cylinder bodies of each support cylinder of the lifting and lowering actuator are connected to the bottom of the boiler protective cover. The hydraulic power module is connected to the lifting and lowering actuator and the traveling drive mechanism via hydraulic lines to provide pressurized oil. The integrated control module controls the hydraulic power module and can switch hydraulic circuits to sequentially execute the following work cycles: During the lifting phase, the control pressure oil synchronously drives all the lifting and lowering actuators to extend, so that the boiler protective cover is lifted as a whole and detached from the furnace frame support below it; During the walking phase, in the lifting state, the control pressure oil drives the walking drive mechanism to work, thereby driving the outrigger walking composite wheel assembly to rotate, so that the boiler protective cover moves along the track to above the target furnace base; During the lowering phase, the control pressure oil synchronously drives all the lifting and lowering actuators to retract, so that the boiler protective cover is lowered as a whole and placed on the furnace frame support of the target furnace base.

[0009] Preferably, the hydraulic power module is a hydraulic pump station system, including a hydraulic oil tank, a level gauge mounted on the hydraulic oil tank, an air filter mounted on the top of the hydraulic oil tank, a motor, a hydraulic pump driven by the motor via a coupling assembly, and a return oil filter element installed on the system's return oil line. The air filter and return oil filter element constitute a specialized cleaning and filtration system for the dusty environment of the crucible firing workshop. This effectively prevents external dust from entering the system through the oil tank's breather and continuously filters particulate contaminants in the internal circulating oil, thereby significantly reducing wear on precision components such as hydraulic pumps and valves, and extending the service life and reliability of the entire system under harsh operating conditions.

[0010] Preferably, the lifting and lowering actuator includes a support cylinder for lifting and lowering. Using the support cylinder directly as the lifting and lowering actuator results in a simple structure, mature technology, and high thrust. The lifting function is directly combined with the subsequent walking support function in terms of force transmission. The piston rod of the support cylinder directly pushes or connects to the walking wheel assembly, resulting in a clear force flow path without intermediate conversion links. Compared to the complex lifting arms or linkage mechanisms in existing technologies, the lifting and lowering actuator has a simpler structure, better rigidity, and higher transmission efficiency. It avoids cumulative errors and structural elastic deformation caused by multi-stage transmission, ensuring that the lifting action is direct, efficient, and reliable. A hydraulic lock is installed on the hydraulic circuit of the support cylinder to lock the position of the support cylinder after the lifting or lowering phase.

[0011] Preferably, the outrigger walking composite wheel assembly includes a driving wheel set, a driven wheel set, and a walking hydraulic motor reducer. The output shaft of the walking hydraulic motor reducer is connected to at least one set of walking wheels in the outrigger walking composite wheel set to drive it as the driving wheel set. Using a walking hydraulic motor reducer to directly drive the driving wheels provides low-speed, high-torque output characteristics, perfectly meeting the needs of heavy-duty equipment startup and smooth low-speed movement. It offers ample safety margin, high integration, stable torque output, and strong overload resistance.

[0012] Preferably, the drive wheel assembly includes a motor mounting bracket. The telescopic end of the support cylinder is connected to the upper end of the motor mounting bracket. A proximity switch is provided on the side of the motor mounting bracket. The lower end of the motor mounting bracket is connected to a travel hydraulic motor reducer, which drives the drive wheel transmission. The upper side of the drive wheel is fitted inside the travel wheel guide sleeve. As an integrated structural component, the motor mounting bracket combines the load of the support cylinder, the reaction torque of the travel hydraulic motor reducer, and the guiding constraint of the drive wheel, achieving a highly compact structure and deep functional integration. This significantly saves bottom installation space. Simultaneously, the proximity switch enables real-time monitoring of the wheel assembly position, providing feedback for automatic control and enhancing the system's intelligence and safety.

[0013] Preferably, the driven wheel assembly includes a driven wheel mounting frame assembly, with the telescopic end of another supporting cylinder connected to the upper end of the driven wheel mounting frame assembly. A second proximity switch is provided on the side of the driven wheel mounting frame assembly, and a driven wheel guide sleeve is fixedly connected to the lower end of the driven wheel mounting frame assembly. The upper side of the driven wheel is fitted inside the driven wheel guide sleeve. The driven wheel guide sleeve and the guide sleeve on the driving wheel side work together to form a double constraint on the track, ensuring that the heavy-duty outer cover does not deviate or jam during long-distance movement, and that the straight-line accuracy of the movement is high. The configuration of the second proximity switch enables the driven side to also have position monitoring capabilities, achieving a more comprehensive perception of the equipment's attitude. This design reflects the integrity of the system in terms of guidance and status monitoring, ensuring the stability and controllability of the entire movement process, and compensating for the shortcomings of simple sliding devices in terms of precise guidance.

[0014] Preferably, the integrated control module includes an electromagnetic directional valve assembly and a control box. The electromagnetic directional valve assembly is used to switch the direction of the hydraulic oil circuit and is connected to the outlet of the hydraulic pump. The control box is used for electrical control of the hydraulic power module and the electromagnetic directional valve assembly. The electromagnetic directional valve assembly, controlled by the control box, can quickly and accurately switch between complex lifting and traveling oil circuits, forming the hardware foundation for achieving an automated sequential operation cycle of "lifting-traveling-lowering". Through a centralized electrical control system, operation is simplified to button commands, significantly reducing operational difficulty and labor intensity, improving the standardization and repeatability of the work process, and providing a core guarantee for achieving efficient and safe alternating operations.

[0015] Compared with the prior art, the present invention achieves the following beneficial technical effects: This invention features highly integrated functions and automated workflows. Compared to existing hydraulic jacking control systems with limited functionality, this invention creatively integrates three core functions—synchronous jacking of large tonnage vessels, track travel, and smooth lowering—into a single hydraulic system. Through the pre-set work cycles of the integrated control module, the entire jacking, traveling, and lowering process is semi-automated and sequentially executed, completely resolving the problems of fragmented functions and cumbersome operation in existing technologies. This significantly improves the efficiency and safety of crucible firing furnace station switching.

[0016] This invention features a compact structure and excellent spatial adaptability. Addressing the potential issues of structural complexity and low integration in existing technologies, this invention employs a combined outrigger and traveling wheel assembly. This assembly directly connects the telescopic end of the support cylinder to the motor mounting bracket or driven wheel mounting bracket assembly, allowing the support cylinder to simultaneously serve as both the lifting actuator and the load-bearing structure of the traveling wheel assembly. This integrated design eliminates redundant transition frames, resulting in an exceptionally compact moving mechanism. It is particularly well-suited to the demanding conditions of extremely limited installation space at the bottom of boiler protective covers, solving the problem of deploying large equipment moving systems in confined spaces.

[0017] This invention features high synchronization accuracy and stable, reliable operation. Through centralized oil supply from the hydraulic power module and coordinated control by the integrated control module, it ensures high-precision synchronous movement of multiple support cylinders during lifting and lowering, effectively preventing the risk of tilting, jamming, or collision with the furnace frame caused by uneven loading of the heavy-duty outer casing. Combined with safety components such as hydraulic locks, the system can reliably lock at any intermediate position, ensuring static safety of the equipment during lifting and smooth, controllable lowering.

[0018] This invention boasts powerful driving performance and high environmental tolerance. It employs a hydraulic motor reducer to directly drive the drive wheel, providing significantly higher torque than required for heavy-load starts and continuous movement. It offers a high safety factor and effectively adapts to common track flatness deviations. Furthermore, the system integrates a cleaning and filtration module consisting of an air filter and a return oil filter, specifically designed for the harsh environment of crucible firing workshops with high temperatures and dust levels. This effectively prevents contaminants from entering the hydraulic system, significantly improving the service life of hydraulic components and the long-term operational reliability of the entire system in complex industrial environments. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the hydraulic system of the mobile crucible firing furnace of the present invention.

[0020] Figure 2 This is a side view of the hydraulic system of the moving crucible firing furnace of the present invention.

[0021] Figure 3 This is a structural diagram of the hydraulic power module and the integrated control module.

[0022] Figure 4 This is a side view of the hydraulic power module and the integrated control module.

[0023] Figure 5 This is a schematic diagram of the hydraulic power module and integrated control module from another side.

[0024] Figure 6 This is a schematic diagram of the active wheel assembly of the walking drive mechanism.

[0025] Figure 7 The diagram shows a cross-sectional view of the drive wheel assembly of the walking drive mechanism, specifically line AA.

[0026] Figure 8 This is a schematic diagram of the structure of the drive wheel and the travel hydraulic motor reducer.

[0027] Figure 9 This is a side view of the drive wheel and the travel hydraulic motor reducer.

[0028] Figure 10A schematic diagram of the driven wheel assembly of the walking drive mechanism.

[0029] Figure 11 A side view of the driven wheel assembly of the walking drive mechanism.

[0030] In the diagram: 1-Boiler protective cover, 2-Railway, 3-Hydraulic power module, 31-Hydraulic oil tank, 32-Level gauge, 33-Air filter, 34-Hydraulic pump, 35-Coupling assembly, 36-Motor, 37-Return oil filter, 4-Lifting and lowering actuator, 41-Support cylinder, 5-Traveling drive mechanism, 51-Outrigger traveling composite wheel assembly, 52-Drive wheel assembly, 521-Motor mounting bracket, 522-Proximity switch one, 523-Drive wheel, 524-Traveling wheel guide sleeve, 53-Driven wheel assembly, 531-Driven wheel mounting bracket assembly, 532-Proximity switch two, 533-Driven wheel guide sleeve, 534-Driven wheel, 54-Traveling hydraulic motor reducer, 6-Integrated control module, 61-Solenoid directional valve assembly, 62-Control box, 7-Hydraulic pipeline. Detailed Implementation

[0031] The technical solution of the present invention will now be described in detail with reference to specific embodiments shown in the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0032] like Figure 1 and Figure 2 As shown, the present invention provides a hydraulic system for a mobile crucible firing furnace, the core of which is to drive a heavy-duty boiler protective cover 1 to move and switch precisely and smoothly between two parallel furnace bases along a preset track 2.

[0033] The hydraulic system of the mobile crucible firing furnace mainly comprises four functional parts: a hydraulic power module 3, a lifting and lowering actuator 4, a walking drive mechanism 5, and an integrated control module 6. These modules are connected into an organic whole through hydraulic pipelines 7. Multiple outrigger walking composite wheel assemblies 51, as end-effectors that directly contact the track 2 and bear the weight of the outer cover 1, are distributed at the bottom of the outer cover 1. The piston rod extension end of the lifting and lowering actuator 4 is connected to the upper part of the outrigger walking composite wheel assembly 51, while the cylinder of the lifting and lowering actuator 4 is fixed to the bottom structure of the boiler protective outer cover 1. The hydraulic power module 3 is responsible for providing power hydraulic fluid to the entire system, and the integrated control module 6 directs and controls each component to work collaboratively according to a preset program.

[0034] like Figure 3 , Figure 4 and Figure 5As shown, the hydraulic power module 3 is specifically an integrated hydraulic pump station system. It includes a hydraulic oil tank 31 for storing hydraulic oil. A level gauge 32 is installed on the oil tank 31 for real-time monitoring of the oil level. An air filter 33 is installed at the top vent of the oil tank 31 to filter the air entering the tank and prevent workshop dust from contaminating the oil. A motor 36 drives the hydraulic pump 34 through a bell-type coupling assembly 35. The hydraulic pump 34 draws oil from the oil tank 31 and generates a high-pressure oil flow. The motor 36 is preferably a 5.5kW four-pole motor, and the hydraulic pump 34 is preferably an external gear pump with a rated pressure of 26MPa.

[0035] The system's return oil line is equipped with a return oil filter element 37, which is used to filter out contaminants such as wear particles generated during system operation and keep the oil clean.

[0036] High-pressure oil first enters the solenoid directional valve assembly 61 of the integrated control module 6. The solenoid directional valve assembly 61 is composed of multiple solenoid directional valves, and its function is to change the flow direction of the oil according to electrical signal commands, thereby controlling actions such as lifting, traveling, and lowering. The solenoid directional valve assembly 61 can integrate a synchronous flow-dividing element, i.e., a synchronous motor, to evenly distribute the oil to the rodless chambers of each support cylinder 41. Electrically connected to the solenoid directional valve assembly 61 is the control box 62, which contains electrical components such as a PLC, relays, and circuit breakers, used to receive operating commands, process logic, and control the start and stop of the motor 36 and the on / off state of each solenoid valve.

[0037] like Figure 6 , Figure 10 As shown, the lifting and lowering actuator 4 consists of multiple support cylinders 41. The cylinder body of each support cylinder 41 is fixedly installed at a corresponding position at the bottom of the boiler protective cover 1, and its piston rod extends vertically downward. A hydraulic lock is provided in the oil circuit of the support cylinder 41 to lock the position of the support cylinder 41 after the lifting or lowering phase is completed.

[0038] The outrigger-walking composite wheel assembly 51 is a key innovative structure of this invention that integrates lifting and walking functions. It mainly includes two structures: the driving wheel assembly 52 and the driven wheel assembly 53.

[0039] like Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the drive wheel assembly 52 includes a motor mounting bracket 521, which is a robust steel structure. The piston rod end of the supporting cylinder 41 is connected to the upper end of the motor mounting bracket 521 via a spherical bearing or flange. The travel hydraulic motor reducer 54 is mounted below the motor mounting bracket 521, and its low-speed output shaft directly drives the drive wheel 523 to rotate via a key connection or other means. A travel wheel guide sleeve 524 is fitted around the upper outer periphery of the drive wheel 523. A small gap is left between the inner side of the travel wheel guide sleeve 524 and the side of the track 2 to provide precise guidance and prevent derailment. A proximity switch 522 is also installed on the side of the motor mounting bracket 521 to detect whether the wheel assembly has reached the predetermined position.

[0040] like Figure 10 and Figure 11 As shown, the driven wheel assembly 53 includes a driven wheel mounting bracket assembly 531, which is also a load-bearing structure. The piston rod of another supporting cylinder 41 is connected to its upper end. The driven wheel 534 is mounted on the lower part of the assembly 531 via bearings and other components, allowing it to rotate freely. A driven wheel guide sleeve 533 is also fitted around the upper outer periphery of the driven wheel 534, serving the same function as the travel wheel guide sleeve 524. A proximity switch 532 is mounted on the side of the assembly 531 for position feedback.

[0041] In a specific application embodiment, a hydraulic system for a mobile crucible firing furnace is used to move a protective cover 1 of a furnace weighing approximately 38 tons. Four supporting cylinders 41 are provided (two on the active side and two on the driven side), with a cylinder diameter of 125mm, providing a total lifting force of approximately 65 tons, ensuring a sufficient safety factor. The travel hydraulic motor reducer 54 is selected from models with a maximum output torque exceeding 10000 N·m, ensuring powerful starting and movement under heavy loads. Long-term use in an actual workshop with an ambient temperature of approximately 25℃ and some dust has shown that the system operates smoothly, with a lifting synchronization error of less than 2mm, and no jamming during movement. Furthermore, thanks to the protection of the air filter 33 and the return oil filter 37, the hydraulic oil cleanliness is maintained at a high level for a long period, significantly reducing the system failure rate.

[0042] To facilitate understanding of the above technical solutions of the present invention, the following detailed description of the above technical solutions of the present invention will be provided through specific usage methods.

[0043] The specific working process is as follows: During the lifting stage, the operator issues a lifting command through the control box 62 of the integrated control module 6. The control box 62 starts the motor 36 of the hydraulic power module 3, and the hydraulic pump 34 works. At the same time, the control electromagnetic reversing valve group 61 switches to the lifting position. The pressurized oil is evenly distributed to the rodless chambers of each support cylinder 41 of the lifting and lowering execution component 4 through the synchronous flow distribution element. The piston rods of all support cylinders 41 extend outward synchronously, pushing the motor mounting bracket 521 and driven wheel mounting bracket assembly 531 of the walking drive mechanism 5 to smoothly lift the entire boiler protective cover 1 until its bottom is completely separated from the original furnace frame support surface. After reaching the position, the electromagnetic reversing valve group 61 returns to the neutral position, the oil circuit of the support cylinder 41 is locked by the hydraulic lock, and the cover 1 maintains a stable suspended lifting state.

[0044] During the traveling phase, after the jacking is completed, the control box 62 controls the solenoid directional valve group 61 to switch to the traveling position. Pressurized oil is guided to the traveling hydraulic motor reducer 54, driving it to rotate. The output torque of the traveling hydraulic motor reducer 54 is converted into traction force through the drive wheel 523. Since the weight of the outer cover 1 is already borne by the support cylinder 41, a positive pressure is formed between the drive wheel 523 and the track 2, generating sufficient friction to drive the entire system. The rotation of the drive wheel 523 drives the boiler protective outer cover 1 to move along the track 2 towards the target furnace base. The driven wheel 534 rolls freely accordingly. The traveling wheel guide sleeve 524 and the driven wheel guide sleeve 533 ensure straight-line movement without deviation. Proximity switches 522 and 532 can monitor the position in real time.

[0045] During the lowering phase, when the outer cover 1 moves directly above the target furnace base, the proximity switch sends a signal, and the control box 62 stops the movement. Subsequently, the control solenoid directional valve group 61 switches to the lowering position. Pressurized oil enters the rod chamber of the support cylinder 41, while oil returns from the rodless chamber. Under the action of the hydraulic oil and the weight of the equipment, the piston rods of all support cylinders 41 retract synchronously with high precision. The boiler protective outer cover 1 then descends smoothly and accurately sits on the furnace frame support of the target furnace base. After reaching its position, the solenoid directional valve group 61 returns to the neutral position, and the hydraulic lock closes again, completing the entire "lifting-moving-lowering" operation cycle.

[0046] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0047] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A hydraulic system for a movable crucible firing furnace, used to drive a boiler protective cover (1) to move along a track (2) between two furnace bases, characterized in that, include: Hydraulic power module (3), lifting and lowering actuator (4), walking drive mechanism (5) and integrated control module (6); The walking drive mechanism (5) includes a plurality of outrigger walking composite wheel assemblies (51) arranged at the bottom of the boiler protective cover (1) for walking along the track (2). The telescopic end of the lifting and lowering execution component (4) is connected to the outrigger walking composite wheel assembly (51); The hydraulic power module (3) is connected to the lifting and lowering execution component (4) and the walking drive mechanism (5) through the hydraulic pipeline (7) to provide pressurized oil; The integrated control module (6) controls the hydraulic power module (3) and can switch the hydraulic circuits to sequentially execute the following work cycles: During the lifting phase, the control pressure oil synchronously drives all the lifting and lowering execution components (4) to extend, so that the boiler protective cover (1) is lifted as a whole and detached from the furnace frame support below it; During the walking phase, in the lifting state, the control pressure oil drives the walking drive mechanism (5) to work, thereby driving the outrigger walking composite wheel assembly (51) to rotate, so that the boiler protective cover (1) moves along the track (2) to above the target furnace base; During the lowering phase, the control pressure oil synchronously drives all the lifting and lowering execution components (4) to retract, so that the boiler protective cover (1) is lowered as a whole and sits on the furnace frame support of the target furnace base.

2. The hydraulic system for the mobile crucible firing furnace according to claim 1, characterized in that, The hydraulic power module (3) is a hydraulic pump station system, including a hydraulic oil tank (31), a level gauge (32) installed on the hydraulic oil tank (31), an air filter (33) installed on the top of the hydraulic oil tank (31), a motor (36), a hydraulic pump (34) connected to the motor (36) via a coupling assembly (35), and a return oil filter (37) installed on the system return oil line.

3. The hydraulic system for the mobile crucible firing furnace according to claim 1, characterized in that, The lifting and lowering execution component (4) includes a support cylinder (41) for lifting and lowering.

4. The hydraulic system for the mobile crucible firing furnace according to claim 3, characterized in that, The outrigger walking composite wheel assembly (51) includes a drive wheel set (52), a driven wheel set (53), and a walking hydraulic motor reducer (54). The output shaft of the walking hydraulic motor reducer (54) is connected to at least one set of walking wheels in the outrigger walking composite wheel set (51) to drive it as the drive wheel set (52).

5. The hydraulic system for the mobile crucible firing furnace according to claim 4, characterized in that, The drive wheel assembly (52) includes a motor mounting bracket (521). The telescopic end of the support cylinder (41) is connected to the upper end of the motor mounting bracket (521). A proximity switch (522) is provided on the side of the motor mounting bracket (521). The lower end of the motor mounting bracket (521) is connected to a walking hydraulic motor reducer (54). The walking hydraulic motor reducer (54) drives the drive wheel (523) for transmission. The upper side of the drive wheel is sleeved in the walking wheel guide sleeve (524).

6. The hydraulic system for the mobile crucible firing furnace according to claim 5, characterized in that, The driven wheel assembly (53) includes a driven wheel mounting bracket assembly (531), and the telescopic end of another support cylinder (41) is connected to the upper end of the driven wheel mounting bracket assembly (531). A second proximity switch (532) is provided on the side end of the driven wheel mounting bracket assembly (531). A driven wheel guide sleeve (533) is fixedly connected to the lower end of the driven wheel mounting bracket assembly (531), and the driven wheel (534) is sleeved on the upper side inside the driven wheel guide sleeve (533).

7. The hydraulic system for the mobile crucible firing furnace according to claim 2, characterized in that, The integrated control module (6) includes an electromagnetic reversing valve group (61) and a control box (62). The electromagnetic reversing valve group (61) is used to switch the direction of the hydraulic oil circuit and connect to the outlet of the hydraulic pump (34). The control box (62) is used to electrically control the hydraulic power module (3) and the electromagnetic reversing valve group (62).

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