A rail-type maintenance trolley for blast furnace bottom maintenance and a working method thereof

Abstract

The application discloses a track type maintenance trolley for blast furnace bottom maintenance and a working method, and relates to the field of blast furnace bottom maintenance. The trolley comprises an extension supporting mechanism, a moving walking mechanism, a working platform mechanism and a material lifting mechanism. The extension supporting mechanism comprises a base frame and at least two groups of extension supporting legs. The moving walking mechanism is connected with the base frame of the extension supporting mechanism and is provided with moving wheels matched with the blast furnace bottom track. The working platform mechanism comprises a main scaffold, a platform pedal and an extension scaffold. The extension scaffold is arranged at the upper end of the main scaffold and extends to the outside of the main scaffold. The material lifting mechanism comprises a lifting mechanism and a material bearing structure connected with the lifting mechanism. The material bearing structure is located directly below the part of the extension scaffold extending to the outside of the main scaffold. The application provides an integrated maintenance device specially used for the blast furnace bottom maintenance, which is special in position, has many obstacles in site and needs heavy load operation. The device integrates walking, supporting, platform and material lifting functions.

Description

Technical Field

[0001] This invention relates to the field of blast furnace maintenance technology, specifically to a track-type maintenance trolley for blast furnace bottom maintenance and its operation method. Background Technology

[0002] The blast furnace is the core main equipment of the ironmaking system in iron and steel metallurgy. The furnace bottom structure is subjected to high temperature, molten iron penetration, slag and iron erosion, static load of furnace charge and equipment vibration for a long time. It is a critical part of the safe operation of the blast furnace and must be inspected, repaired, replaced and maintained regularly.

[0003] Although the blast furnace bottom offers ample working space, its foundation is mostly composed of sand and gravel, and the maintenance positions are at considerable heights, making it a typical high-risk operation. Currently, there is no integrated maintenance device specifically designed for the unique location of blast furnace bottom maintenance, which involves numerous obstacles and heavy-duty operations. The traditional maintenance method of erecting fixed full-span scaffolding is commonly used.

[0004] However, this traditional operating method has the following prominent drawbacks: First, it is difficult to move and position the equipment: there is no dedicated walking equipment, and tools, materials, and outriggers must be carried in manually, which can easily collide with the furnace bottom pipes, foundations, and cooling equipment, causing equipment damage. Second, the support system is unstable: the traditional temporary support system using steel pipes, fasteners, and timber is not strong enough and has poor stability. Under heavy loads, it is prone to instability and collapse, causing accidents such as falling objects and personnel falling. Third, the construction of the working platform is cumbersome: it requires the manual construction of a full-span scaffold, which consumes a lot of materials, requires a large amount of manpower, and has a long operation cycle. The height and width of the platform are difficult to adapt to the complex space of the furnace bottom. Fourth, the material transfer efficiency is extremely low: tools, spare parts, and materials rely entirely on manual transfer, carrying and lifting, which is labor-intensive, slow, and prone to falling, seriously restricting maintenance efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a track-type maintenance trolley and operating method for blast furnace bottom maintenance. It aims to improve the existing technology, which lacks an integrated maintenance device specifically designed for the special location, numerous obstacles, and heavy-duty operation of blast furnace bottom maintenance. This invention solves the problems of inconvenient positioning, poor support stability, time-consuming and labor-intensive platform construction, low material transfer efficiency, and prominent safety hazards in existing maintenance methods.

[0006] To achieve the above objectives, according to a first aspect of the present invention, the present invention provides a track-mounted maintenance trolley for blast furnace bottom maintenance, comprising: A telescopic support mechanism includes a base frame and at least two sets of telescopic outriggers. The width of the base frame is less than its length. Each side of the base frame in the width direction is provided with a set of telescopic outriggers, and each set of telescopic outriggers includes at least two telescopic outriggers that are spaced a distance apart. The mobile walking mechanism is connected to the basic frame of the telescopic support mechanism and has mobile wheels that are compatible with the furnace bottom track. The working platform mechanism includes a main scaffold, platform treads, and an extended scaffold. The main scaffold is mounted on a foundation frame, and the platform treads are mounted on the main scaffold. The extended scaffold is located at the upper end of the main scaffold and extends outward from the main scaffold. The material lifting mechanism includes a lifting mechanism and a material carrying structure connected to the lifting mechanism. The material carrying structure is located directly below the portion of the extended scaffold that extends to the outer side of the main scaffold. The lifting mechanism is installed on the foundation frame and the extended scaffold and is used to drive the material carrying structure to move up and down in the vertical direction.

[0007] Furthermore, the mobile walking mechanism also includes a wheel fixing support frame, the upper end of which is connected to the base frame, and the mobile wheel is disposed at the lower end of the wheel fixing support frame; an auxiliary walking mechanism is also connected to the wheel fixing support frame, the auxiliary walking mechanism includes an auxiliary walking bracket, a first electric cylinder is mounted on the auxiliary walking bracket, a walking wheel is disposed at the lower end of the piston rod of the first electric cylinder, a drive mechanism is disposed on the base frame, the drive mechanism is connected to the walking wheel, and is used to drive the walking wheel to rotate, the walking wheel and the mobile wheel move in the same direction.

[0008] Furthermore, the basic frame includes multiple longitudinal beams and multiple transverse beams, which are made of steel profiles and welded together.

[0009] Furthermore, the telescopic outrigger frame includes a vertical beam plate, telescopic outriggers, and a rotating connection structure. The vertical beam plate is connected to the foundation frame, and the telescopic outriggers are connected to the vertical beam plate via the rotating connection structure. The rotating connection structure includes a hollow sleeve and a rotating connecting shaft. The hollow sleeve is connected to the vertical beam plate and is horizontally positioned. The vertical beam plate is made of structural steel and welded to the foundation frame. The rotating connecting shaft is connected to the telescopic outriggers and is rotatably positioned within the hollow sleeve.

[0010] Furthermore, the telescopic outrigger includes a handle, an outer cylinder of the outrigger, and a telescopic support for the outrigger. The outer cylinder of the outrigger is connected to a rotating connection structure. The telescopic support for the outrigger includes an adjusting rod and a support block. The support block is connected to the lower end of the adjusting rod, and the adjusting rod is slidably disposed within the outer cylinder of the outrigger. The handle is convexly connected to the adjusting rod and is used to drive the adjusting rod to extend or retract axially relative to the outer cylinder of the outrigger. The handle is disposed on the side of the outer cylinder of the outrigger and is Z-shaped, including a drive shaft, a grip, and a connecting rod for connecting the drive shaft and the grip. The drive shaft is convexly connected to the adjusting rod via a worm gear mechanism, and when the grip is rotated horizontally, it drives the adjusting rod to extend or retract axially relative to the outer cylinder of the outrigger. The telescopic outrigger also includes a locking structure disposed on the outer cylinder of the outrigger and is used to lock the relative position of the adjusting rod and the outer cylinder of the outrigger after the adjusting rod has extended or retracted to its final position.

[0011] Furthermore, the telescopic outrigger frame includes a vertical beam plate, a first connecting beam, an outer cylinder of the outrigger, and a telescopic support for the outrigger. The vertical beam plate is connected to the foundation frame, and the outer cylinder of the outrigger is vertically arranged and connected to the vertical beam plate through the first connecting beam. The telescopic support for the outrigger includes an adjusting rod portion and a support block portion. The support block portion is connected to the lower end of the adjusting rod portion, and the adjusting rod portion is slidably disposed inside the outer cylinder of the outrigger. A second electric cylinder is provided at the upper end of the outer cylinder of the outrigger. The piston rod of the second electric cylinder extends downward into the outer cylinder of the outrigger and is connected to the adjusting rod portion of the telescopic support for the outrigger, for automatically driving the telescopic support for the outrigger to extend and retract vertically.

[0012] Furthermore, tilt sensors are installed at the four corners of the basic frame, and an alarm is installed next to each tilt sensor; a control box is also installed on the basic frame, and a controller is installed in the control box. The drive mechanism, the first electric cylinder, the second electric cylinder, the tilt sensors, and the alarm are all electrically connected to the controller; the controller is used to collect tilt data in real time and compare it with a preset threshold. When the tilt exceeds the limit, the controller drives the alarm to issue an audible and visual warning and automatically adjusts the extension and retraction of the second electric cylinders on each side to complete the leveling correction of the vehicle body; the outer side of the outrigger outer cylinder is connected to a second connecting beam. A telescopic auxiliary walking wheel assembly includes a fixed outer cylinder, a telescopic inner rod, an auxiliary wheel, and a third electric cylinder. The fixed outer cylinder is connected to the outrigger outer cylinder via a second connecting beam and is also connected to a vertical beam plate via a stabilizing frame. The upper end of the telescopic inner rod is located in the fixed outer cylinder, and the lower end extends below the fixed outer cylinder. The auxiliary wheel is installed at the lower end of the telescopic inner rod. The third electric cylinder is vertically fixed to the upper end of the fixed outer cylinder, and its piston rod is fixedly connected to the top end of the telescopic inner rod for driving the telescopic inner rod and the auxiliary wheel to extend and retract as a whole. The third electric cylinder is also electrically connected to a controller.

[0013] Furthermore, the scaffolding includes scaffold horizontal bars, scaffold vertical bars, scaffold diagonal supports, reinforcing rods, and fixing sleeves. The foundation frame is provided with insertion slots or insertion pipes for inserting the scaffold vertical bars. The scaffold horizontal bars, scaffold vertical bars, and scaffold diagonal supports are connected by fasteners. The fixing sleeves are welded to the foundation frame. The reinforcing rods are inserted into the fixing sleeves. The scaffold diagonal supports are connected to the reinforcing rods by fasteners. The extended scaffolding is connected to the upper end of the main scaffolding by fasteners.

[0014] Furthermore, the material carrying structure is a material hoisting cage, and the lifting mechanism includes a winch, a wire rope, a fixed pulley, and a fixed pulley hook. The winch is installed on the foundation frame, the fixed pulley hook is suspended on the extended scaffold, the fixed pulley is installed on the fixed pulley hook, one end of the wire rope is connected to the winch, and the other end passes around the fixed pulley and is connected to the material hoisting cage.

[0015] According to a second aspect of the present invention, the present invention provides a method for blast furnace bottom maintenance, which uses the above-mentioned track-type maintenance trolley for blast furnace bottom maintenance to perform maintenance operations on the blast furnace bottom, including the following steps: S100. Maintenance preparation: After forced ventilation of the furnace bottom and testing that the gas is qualified, clean up the debris and obstacles at the furnace bottom; set up the maintenance trolley on the furnace bottom track, and after inspection and acceptance, push the trolley along the track to the predetermined position at the furnace bottom and lock the moving wheels. S200, Stable Support: Adjust each telescopic outrigger to the support position so that each telescopic outrigger is pressed against the ground. Check the level of the trolley. Fine-tune the telescopic outrigger until the level of the maintenance trolley meets the standard, and then lock the telescopic outrigger. S300 Load Acceptance: Start the material lifting mechanism, conduct no-load test lifting and load acceptance, and proceed with subsequent operations after the load acceptance is qualified. S400, Maintenance Operations: Maintenance personnel use a track-mounted maintenance trolley for blast furnace bottom maintenance to carry out maintenance operations on the blast furnace bottom. During the maintenance process, after the current maintenance position is completed, the telescopic outriggers are retracted, the moving wheels are unlocked, and the maintenance trolley is moved along the furnace bottom track to the next work position to continue the maintenance operation until all maintenance operations are completed. S500 Recycling and Dismantling: After all maintenance work is completed, clean the platform and tools, reverse the operation to dismantle and remove the maintenance trolley from the bottom of the blast furnace.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides an integrated maintenance device specifically designed for blast furnace bottom maintenance operations that are characterized by their unique location, numerous obstacles, and heavy load requirements. It integrates walking, support, platform, and material lifting functions, and provides a standardized construction method that is versatile and economical for blast furnace bottom maintenance operations.

[0017] 2. This invention integrates track-based movement and rapid locking, completely solving the problem of furnace bottom displacement. It moves in a straight line along the original furnace bottom track without collision or deviation; it locks itself in place upon arrival, ensuring precise and reliable positioning and enabling rapid entry and exit.

[0018] 3. This invention employs a rigid frame and height-adjustable support to fundamentally improve stability. The main frame has high strength, the telescopic outriggers expand the support area, and the adjustable supports adapt to uneven ground, forming multi-point rigid support that prevents swaying, tilting, and sinking under heavy loads.

[0019] 4. This invention features a modular, quick-assembly work platform, significantly reducing assembly and disassembly time. Using a basic frame as a base, with plug-in scaffolding and fully laid anti-slip mats, it can be quickly erected without requiring a full-span scaffold, saving labor, materials, time, and ensuring safety. Furthermore, the platform can be erected to the desired height according to different maintenance work requirements.

[0020] 5. This invention is equipped with a dedicated material lifting system to achieve mechanized transfer. Materials can be transported vertically and stably, eliminating the risk of falling during manual handling, reducing labor intensity, and improving maintenance efficiency.

[0021] 6. This invention provides a standardized construction operation method for the entire process, which is replicable and scalable. From preparation to withdrawal, it forms a fixed procedure, ensuring safety and controllability, stable quality, and easy personnel training. It is applicable to the maintenance of the bottom of various blast furnaces, demonstrating outstanding versatility and economy.

[0022] 7. This invention uses a first electric cylinder and a traveling wheel in conjunction with a drive mechanism, combined with current detection, to ensure that the maintenance trolley moves stably along the track; the tilt sensor is linked with the controller, and when the tilt exceeds the limit, the alarm 31 issues a warning and automatically adjusts the second electric cylinder to level it, eliminating the risk of overturning.

[0023] 8. This invention can realize multi-wheel coordination and dual-mode control. When unloaded, the third electric cylinder 38 lowers the auxiliary wheel 37 and switches to fast mode to increase the output speed of the drive mechanism, thereby increasing the transfer speed. When under heavy load, it switches back to slow mode to balance efficiency and safety. Attached Figure Description

[0024] Figure 1 A schematic diagram of the overall track-type maintenance trolley for blast furnace bottom maintenance provided by the present invention; Figure 2 This is a schematic diagram of the bottom frame of the track-type maintenance trolley for blast furnace bottom maintenance provided by the present invention. Figure 3 This is a schematic diagram of the material lifting mechanism of the track-type maintenance trolley for blast furnace bottom maintenance provided by the present invention. Figure 4This is a schematic diagram of the scaffolding and frame connection for the track-type maintenance trolley for blast furnace bottom maintenance provided by the present invention. Figure 5 This is a schematic diagram of the structure in Embodiment 3 of the present invention, showing the connection between the auxiliary walking mechanism and the wheel fixing support frame. Figure 6 This is a schematic diagram of the telescopic outrigger frame in Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the structure of the telescopic outrigger frame connected to the telescopic auxiliary walking wheel assembly in Embodiment 3 of the present invention.

[0025] Reference numerals: 1. Moving wheel; 2. Material hoisting cage; 3. Telescopic outrigger; 4. Scaffold; 5. Platform board; 6. Wheel fixing support frame; 7. Vertical beam; 8. Longitudinal beam; 9. Transverse beam; 10. Winch; 11. Wire rope; 12. Outrigger; 13. Fixed pulley hook; 14. Fixed pulley; 15. Scaffold horizontal bar; 16. Scaffold vertical bar; 17. Hook; 18. Furnace bottom track; 19. Scaffold diagonal support; 20. Hollow sleeve; 21. Rotary connecting shaft; 22. Handle; 23. Outrigger outer cylinder; 24. Telescopic outrigger support; 25. Reinforcing fixing rod; 26. Fixing sleeve; 27. Auxiliary walking bracket; 28. First electric cylinder; 29. ​​Walking wheel; 30. Tilt sensor; 31. Alarm; 32. 33. Second electric cylinder; 34. Second connecting beam; 35. Fixed outer cylinder; 36. Telescopic inner rod; 37. Auxiliary wheel; 38. Third electric cylinder; 39. Stabilizing frame. Detailed Implementation

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 This embodiment provides a track-type maintenance trolley for blast furnace bottom maintenance. The track-type maintenance trolley mainly includes four mechanisms: a moving and walking mechanism, a telescopic support mechanism, a working platform mechanism, and a material lifting mechanism.

[0028] like Figure 1 , Figure 2 and Figure 4As shown, the telescopic support mechanism includes a base frame and two sets of telescopic outriggers 3. The base frame is the basic support frame for the overall maintenance trolley, and is a closed rigid frame formed by welding longitudinal beams 8 and transverse beams 9. Both longitudinal beams 8 and transverse beams 9 are mainly made of structural steel, which has high overall strength and good torsional resistance. On both sides of the width direction of the base frame, three telescopic outriggers 3 that can be extended and rotated are welded, symmetrically arranged on both sides, for a total of six sets of telescopic outriggers, which can form multi-point balanced support. The telescopic outrigger 3 consists of a vertical beam 7, a hollow sleeve 20, a rotating connecting shaft 21, a handle 22, an outer cylinder of the outrigger 23, a telescopic support for the outrigger 24, and a locking structure. The vertical beam 7 is made of structural steel and is welded and fixed to the ends of the transverse beams 9. The hollow sleeve 20 is horizontally welded to the vertical beam 7, and the rotating connecting shaft 21 passes through it. The rotating connecting shaft 21 is welded to the outer cylinder of the outrigger 23, so that the outer cylinder of the outrigger 23 can rotate horizontally around the vertical beam 7. The outrigger outer cylinder 23 is internally fitted with a telescopic outrigger support 24, which includes an adjusting rod and a support block. The support block is connected to the lower end of the adjusting rod, which is slidably disposed within the outrigger outer cylinder 23. A handle 22, Z-shaped, is located on the side of the outrigger outer cylinder 23 and consists of a drive shaft, a grip, and a connecting rod. The drive shaft is connected to the adjusting rod via a worm gear mechanism; horizontal rotation of the grip drives the adjusting rod to extend or retract axially along the outrigger outer cylinder 23. A locking structure is installed on the outrigger outer cylinder 23 and includes a threaded through-hole leading to the interior of the outrigger outer cylinder 23 and a threaded bolt clamping element installed in the threaded through-hole. After the adjusting rod has extended or retracted to its designated position, the locking structure locks the relative position of the adjusting rod and the outrigger outer cylinder 23 to prevent retraction. The telescopic support mechanism forms a rigid and stable support system with multiple landing points and adjustable height, capable of withstanding the full load of maintenance personnel, tools, materials, and the platform, and meeting the requirements for anti-overturning and anti-swaying during heavy-duty operations.

[0029] like Figure 1 and Figure 2 As shown, the mobile traveling mechanism consists of the following components: mobile wheels 1, furnace bottom rail 18, and wheel fixing support frame 6. The mobile wheels 1 use four sets of heavy-duty wear-resistant steel wheels, symmetrically arranged at the four corners of the trolley's bottom, matching the furnace bottom rail 18, ensuring smooth movement without deviation or obstruction. The furnace bottom rail 18 is the existing basic rail for transporting iron ladles in the blast furnace, requiring no additional installation. The wheel fixing support frame 6 is made of channel steel, with its lower end welded to the fixing parts of the two mobile wheels 1 on the same side, ensuring the two wheels are collinear and level, allowing the wheels to fully engage with the furnace bottom rail 18 and preventing lateral slippage. Its upper end is welded and fixed to the longitudinal beam plate 8. The entire traveling mechanism's function is to enable the trolley to move smoothly, accurately, and directionally along the furnace bottom rail 18 to the predetermined work position. Once in position, it is locked using rail clamps, providing a stable foundation for subsequent support and operations.

[0030] like Figure 1 , Figure 3 and Figure 4 As shown, the working platform mechanism mainly includes a main scaffold 4, platform treads 5, and an extended scaffold 12. The main scaffold 4 includes scaffold horizontal bars 15, scaffold vertical bars 16, scaffold diagonal supports 19, reinforcing and fixing rods 25, and fixing sleeves 26. The fixing sleeves 26 are welded to the foundation frame, and the lower ends of the scaffold vertical bars 16 are inserted into the insertion slots or insertion pipes of the foundation frame, allowing for rapid erection of the main scaffold 4. The scaffold horizontal bars 15, scaffold vertical bars 16, and scaffold diagonal supports 19 are reliably connected by fasteners to form a stable frame. The main scaffold 4 is fully covered with non-slip steel platform treads 5, which are fixed with clips to prevent warping and slippage. The extended scaffold 12 is connected to the upper end of the main scaffold 4 by fasteners and extends outward to expand the working area. The reinforcing rod 25 is inserted into the fixing sleeve 26, and the scaffold diagonal support 19 is connected to the reinforcing rod 25 by fasteners to form a triangular stable structure, suppressing the scaffold's swaying. If necessary, the main scaffold 4 is welded and fixed at the contact point with the foundation frame to prevent overall displacement and collapse. The scaffold around the platform also serves as a safety guardrail. The entire working platform mechanism is designed to quickly erect a fixed working platform that meets safety regulations, providing a stable, non-slip, and protected maintenance work surface.

[0031] like Figure 1 and Figure 3 As shown, the material lifting mechanism includes a winch 10, a wire rope 11, a fixed pulley 14, a fixed pulley hook 13, and a material lifting cage 2. The winch 10 is fixedly installed on the transverse beam 9 of the foundation frame and is electrically driven. The fixed pulley hook 13 is suspended at a suitable position on the extended scaffold 12, and the fixed pulley 14 is installed on the fixed pulley hook 13 to ensure the vertical guidance of the wire rope 11. The material lifting cage 2 is a closed frame cage to prevent materials from falling, and its size is suitable for the transfer of conventional spare parts. One end of the wire rope 11 is connected to the winch 10, and the other end passes over the fixed pulley 14 and connects to the material lifting cage 2. The end of the wire rope 11 connected to the material lifting cage 2 is also equipped with a hook 17. The winch 10 drives the material lifting cage 2 to lift vertically in both forward and reverse directions. In addition, vertical guide rails from top to bottom can be added to both sides of the material lifting cage 2 to restrict the movement of the material lifting cage 2 and prevent the lifting cage from deviating, becoming unstable, and falling. The entire material lifting mechanism is designed to safely, efficiently, and smoothly transport tools, spare parts, and materials to the work platform, reducing manual handling, lowering the risk of falls from heights, and improving maintenance efficiency.

[0032] Example 2 This embodiment provides a method for blast furnace bottom maintenance, using the track-type maintenance trolley for blast furnace bottom maintenance provided in Embodiment 1 to perform maintenance work on the blast furnace bottom, including the following steps: S100. Maintenance Preparation: Before operation, perform forced ventilation and gas testing at the furnace bottom to confirm that the oxygen content, toxic and harmful gases, and combustible gases are all within acceptable limits. Clean up debris, waste, and obstacles at the furnace bottom to ensure unobstructed passage. Assemble and inspect the maintenance trolley on the furnace bottom track 18. After acceptance, manually or with traction equipment, slowly push the trolley along the furnace bottom track 18 to the designated maintenance position, adjust the centering, and lock the moving wheels 1 with rail clamps.

[0033] S200, Stable Support: Rotate the telescopic outriggers 3 on both sides around the vertical beam 7 to the support position. Horizontally rotate the handle 22, driving the adjusting rod to extend via the worm gear mechanism, so that the telescopic outrigger support 24 is firmly pressed against the ground. Check the trolley's levelness, fine-tuning each handle 22 to ensure the foundation frame is level, without wobbling or tilting. Operate the locking mechanism to lock the adjusting rod to prevent retraction, confirming the reliability of the support system.

[0034] S300 Load Acceptance: Start the material lifting mechanism and conduct a no-load test lift to check that the winch 10, wire rope 11, fixed pulley 14, and material lifting cage 2 are operating normally. Conduct a static load acceptance test according to the design load. If there is no deformation or abnormal noise, it is considered qualified and can be put into use.

[0035] S400, Maintenance Operations: Workers wearing protective gear and safety belts transport tools, spare parts, and materials to the work platform via the material hoisting cage 2. On the platform, maintenance operations such as furnace bottom inspection, repair, replacement, and cleaning are carried out. During the operation, the status of the supports, platform, locking, and lifting system is checked regularly; any abnormalities are immediately addressed and work is stopped. After completing the work in a single area, the locking structure is released, the handle 22 is reversed to retract the telescopic support 24, the telescopic support frame 3 is rotated to close, the rail clamp lock is released, and the trolley is moved along the furnace bottom track 18 to the next work position. After repeated support stabilization and load acceptance, work continues until all maintenance is completed.

[0036] S500, Recycling and Dismantling: After all maintenance is completed, clean up the tools, materials, and garbage on the work platform. Dismantle the extended scaffolding 12, platform treads 5, scaffolding crossbars 15, scaffolding uprights 16, and scaffolding diagonal supports 19 in the order of outside to inside, and store them separately. Release the locking structure, turn the handle 22 in the opposite direction to retract the telescopic support 24 of the outriggers, and rotate to retract the telescopic outrigger frame 3. Release the wheel locks and move the maintenance trolley smoothly along the furnace bottom track 18 out of the furnace bottom to a safe area, completing the dismantling and evacuation.

[0037] Example 3 This embodiment differs from Embodiment 1 in the following ways: like Figure 5As shown, an auxiliary walking mechanism is connected to the wheel fixing support frame 6. The auxiliary walking mechanism includes an auxiliary walking bracket 27, on which a first electric cylinder 28 is mounted. A walking wheel 29 is provided at the lower end of the piston rod of the first electric cylinder 28, and the walking wheel 29 is located directly above the furnace bottom track 18. A drive mechanism is provided on the basic frame, and the drive mechanism is connected to the walking wheel 29. The first electric cylinder 28 can drive the walking wheel 29 to move up and down. When moving downward, the walking wheel 29 presses against and adheres to the furnace bottom track 18. In conjunction with the drive mechanism, the maintenance trolley can move stably and move precisely along the track. The pressing force of the walking wheel 29 and its contact with the track can be judged in real time by detecting the operating current of the first electric cylinder 28. The drive mechanism has various structural forms, which can be selected according to actual needs. For example, it can be a structure of motor, reducer, and pulley. The motor and reducer are mounted on the basic frame. The motor is connected to the input end of the reducer, and the output shaft of the reducer is equipped with a drive pulley. The axle of the traveling wheel 29 is fixedly mounted with a driven pulley. The drive pulley and the driven pulley are connected by a transmission belt, thus realizing the rotation drive of the traveling wheel 29. In addition, the auxiliary traveling bracket 27 is provided with a through hole for the piston rod of the first electric cylinder 28 to pass through. The diameter of the through hole is adapted to the diameter of the piston rod, which can not only ensure the smooth up and down extension and retraction of the piston rod, but also improve the stability of the traveling wheel 29 during operation and reduce the impact on the first electric cylinder 28.

[0038] like Figure 6 As shown, the telescopic outrigger 3 is a non-rotatable but vertically extendable structure, comprising an outer outrigger cylinder 23 and a telescopic outrigger support 24. The telescopic outrigger support 24 includes an adjusting rod and a support block. The support block is connected to the lower end of the adjusting rod, which is slidably disposed within the outer outrigger cylinder 23. The outer outrigger cylinder 23 is detachably connected to the vertical beam plate 7 via a first connecting beam 32. A second electric cylinder 33 is installed at the upper end of the outer outrigger cylinder 23. The piston rod of the second electric cylinder 33 extends downward into the outer outrigger cylinder 23 and is connected to the adjusting rod of the telescopic outrigger support 24. The second electric cylinder 33 automatically drives the telescopic outrigger support 24 to extend and retract vertically, replacing the manual handle adjustment mode, further improving the automation level and support positioning of the outrigger and increasing work efficiency, while reducing the labor intensity of manual operation. In addition, tilt sensors 30 are installed at the four corners of the basic frame, and an alarm 31 is installed next to each tilt sensor 30. A control box is also installed on the basic frame, containing a controller. The drive mechanism, the first electric cylinder 28, the second electric cylinder 33, the tilt sensors 30, and the alarms 31 are all electrically connected to the controller. The controller collects tilt data in real time and compares it with a preset threshold. When the tilt exceeds the limit, the alarm 31 is immediately activated to issue an audible and visual warning. At the same time, the operation of the drive mechanism is stopped, and the extension and retraction of the second electric cylinders 33 on each side are automatically adjusted to quickly complete the leveling correction of the vehicle body and eliminate the risk of the car overturning.

[0039] like Figure 7 As shown, a telescopic auxiliary travel wheel assembly is connected to the outer side of the outrigger outer cylinder 23 via a second connecting beam 34. The telescopic auxiliary travel wheel assembly includes a fixed outer cylinder 35, a telescopic inner rod 36, an auxiliary wheel 37, and a third electric cylinder 38. The fixed outer cylinder 35 is connected to the outrigger outer cylinder 23 via the second connecting beam 34. To ensure the stability of the connection, the fixed outer cylinder 35 is also connected to the vertical beam plate 7 via a stabilizing frame 39. The upper end of the telescopic inner rod 36 is located in the fixed outer cylinder 35, and the lower end extends below the fixed outer cylinder 35. The auxiliary wheel 37 is installed at the lower end of the telescopic inner rod 36. The third electric cylinder 38 is vertically fixed to the upper end of the fixed outer cylinder 35, and its piston rod is fixedly connected to the top of the telescopic inner rod 36, which can drive the telescopic inner rod 36 and the bottom auxiliary wheel 37 to extend and retract as a whole. When the trolley travels on the normal track, the auxiliary wheel is lowered to share the load of the trolley. When the trolley deviates or the local force is uneven, it works in conjunction with the main travel structure to limit the movement, further improving the stability of the trolley's movement and the stability of heavy-load support.

[0040] The controller has two operating modes: a slow-moving mode for routine maintenance and a fast-moving mode for unloaded track operation. When the trolley is moving without personnel or materials, the controller switches to fast-moving mode and simultaneously extends the third electric cylinder 38, causing multiple sets of auxiliary wheels 37 to land synchronously and share the load of the trolley. Since the distance between the auxiliary wheels 37 on both sides is greater than the distance between the main traveling wheels, the support span can be further widened, enhancing the stability of the trolley. At the same time, the output speed of the drive mechanism is increased, accelerating the trolley's track movement speed. When the trolley arrives at the work site and picks up personnel and maintenance materials, it automatically switches back to slow-moving mode, balancing trolley transfer efficiency with safety during heavy-load operations.

[0041] This invention has the following innovative features and technical effects: First, the integrated track-based movement and rapid locking completely solve the problem of furnace bottom displacement. It moves in a straight line along the original furnace bottom track without collision or deviation; it locks itself in place upon arrival, ensuring precise and reliable positioning and enabling rapid entry and exit.

[0042] Secondly, the rigid frame and height-adjustable supports enhance stability from the root. The main frame has high strength, the telescopic outriggers expand the support area, and the adjustable supports adapt to uneven ground, forming multi-point rigid support that prevents swaying, tilting, and sinking under heavy loads.

[0043] Thirdly, the modular quick-assembly work platform significantly reduces assembly and disassembly time. Based on a basic frame, with plug-in scaffolding and fully laid anti-slip mats, it can be quickly erected without requiring a full-span scaffold, saving labor, materials, time, and ensuring safety. Furthermore, the platform can be erected to the desired height according to different maintenance work needs.

[0044] Fourth, it is equipped with a dedicated material lifting system to achieve mechanized transfer. Materials can be transported vertically and stably, eliminating the risk of falling during manual handling, reducing labor intensity, and improving maintenance efficiency.

[0045] Fifth, the entire process is standardized and can be replicated and promoted. From preparation to evacuation, a fixed procedure is formed, ensuring safety and controllability, stable quality, and easy personnel training. It is applicable to the maintenance of the bottom of various blast furnaces, and its versatility and economy are outstanding.

[0046] Sixth, it can achieve electric drive and active correction. The first electric cylinder 28 and the traveling wheel 29 work together with the drive mechanism and current detection to ensure that the maintenance trolley moves stably along the track; the tilt sensor 30 is linked with the controller, and when the tilt exceeds the limit, the alarm 31 will give a warning and automatically adjust the second electric cylinder 33 to level it, eliminating the risk of overturning.

[0047] Seventh, it can achieve multi-wheel coordination and dual-mode control. When unloaded, the third electric cylinder 38 lowers the auxiliary wheel 37 and switches to fast travel mode to increase the output speed of the drive mechanism, thereby increasing the transfer speed; when under heavy load, it switches back to slow travel mode to balance efficiency and safety.

[0048] In summary, this invention provides an integrated maintenance device specifically designed for blast furnace bottom maintenance operations, which are characterized by unique locations, numerous obstacles, and heavy-duty requirements. It integrates walking, support, platform, and material lifting functions, and provides a standardized construction method that is versatile and economical for blast furnace bottom maintenance operations.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A track-type maintenance trolley for blast furnace bottom maintenance, characterized in that, include: The telescopic support mechanism includes a base frame and at least two sets of telescopic outriggers (3), with a set of telescopic outriggers (3) provided on each side of the base frame in the width direction. The mobile walking mechanism is connected to the base frame of the telescopic support mechanism and has mobile wheels (1) adapted to the furnace bottom track (18). The working platform mechanism includes a main scaffold (4), a platform tread (5), and an extended scaffold (12). The main scaffold (4) is set on the foundation frame, and the platform tread (5) is set on the main scaffold (4). The extended scaffold (12) is set at the upper end of the main scaffold (4) and extends outward from the main scaffold (4). The material lifting mechanism includes a lifting mechanism and a material carrying structure connected to the lifting mechanism. The material carrying structure is located directly below the portion of the extended scaffold (12) that extends to the outside of the main scaffold (4). The lifting mechanism is installed on the foundation frame and the extended scaffold (12) and is used to drive the material carrying structure to rise and fall in the vertical direction.

2. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The mobile walking mechanism also includes a wheel fixing support frame (6), the upper end of which is connected to the base frame, and the mobile wheel (1) is set at the lower end of the wheel fixing support frame (6); the wheel fixing support frame (6) is also connected to an auxiliary walking mechanism, the auxiliary walking mechanism includes an auxiliary walking bracket (27), a first electric cylinder (28) is installed on the auxiliary walking bracket (27), a walking wheel (29) is set at the lower end of the piston rod of the first electric cylinder (28), a driving mechanism is set on the base frame, the driving mechanism is connected to the walking wheel (29) and is used to drive the walking wheel (29) to rotate, and the walking wheel (29) moves in the same direction as the mobile wheel (1).

3. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The basic frame includes multiple longitudinal beams (8) and multiple transverse beams (9), which are made of steel profiles and welded together.

4. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The telescopic outrigger (3) includes a vertical beam plate (7), telescopic outriggers, and a rotating connection structure. The vertical beam plate (7) is connected to the foundation frame, and the telescopic outriggers are connected to the vertical beam plate (7) through the rotating connection structure. The rotating connection structure includes a hollow sleeve (20) and a rotating connection shaft (21). The hollow sleeve (20) is connected to the vertical beam plate (7) and is horizontally arranged. The vertical beam plate (7) is made of steel profiles and welded to the foundation frame. The rotating connection shaft (21) is connected to the telescopic outriggers and is rotatably arranged in the hollow sleeve (20).

5. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 4, characterized in that, The telescopic outrigger includes a handle (22), an outer cylinder (23), and a telescopic support (24). The outer cylinder (23) is connected to a rotatable connection structure. The telescopic support (24) includes an adjusting rod and a support block. The support block is connected to the lower end of the adjusting rod, and the adjusting rod is slidably disposed in the outer cylinder (23). The handle (22) is throttle-connected to the adjusting rod and is used to drive the adjusting rod to extend and retract axially relative to the outer cylinder (23). The handle (22) is disposed on the support... On the side of the leg outer cylinder (23), the handle (22) is Z-shaped and includes a drive shaft, a grip, and a connecting rod for connecting the drive shaft and the grip. The drive shaft is connected to the adjusting rod via a worm gear mechanism. When the grip is rotated horizontally, the adjusting rod is driven to extend and retract axially relative to the leg outer cylinder (23). The telescopic outrigger also includes a locking structure, which is provided on the leg outer cylinder (23) and is used to lock the relative position of the adjusting rod and the leg outer cylinder (23) after the adjusting rod has extended and retracted to the correct position.

6. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The telescopic outrigger (3) includes a vertical beam plate (7), a first connecting beam (32), an outer cylinder of the outrigger (23), and a telescopic support for the outrigger (24). The vertical beam plate (7) is connected to the foundation frame. The outer cylinder of the outrigger (23) is vertically arranged and connected to the vertical beam plate (7) through the first connecting beam (32). The telescopic support for the outrigger (24) includes an adjusting rod and a support block. The support block is connected to the lower end of the adjusting rod, and the adjusting rod is slidably arranged inside the outer cylinder of the outrigger (23). A second electric cylinder (33) is provided at the upper end of the outer cylinder of the outrigger (23). The piston rod of the second electric cylinder (33) extends downward into the outer cylinder of the outrigger (23) and is connected to the adjusting rod of the telescopic support for the outrigger (24) for automatically driving the telescopic support for the outrigger (24) to extend and retract up and down.

7. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 6, characterized in that, Tilt sensors (30) are installed at the four corners of the basic frame, and an alarm (31) is installed next to each tilt sensor (30). A control box is also installed on the basic frame, and a controller is installed in the control box. The drive mechanism, the first electric cylinder (28), the second electric cylinder (33), the tilt sensor (30) and the alarm (31) are all electrically connected to the controller. The controller is used to collect tilt data in real time and compare it with a preset threshold. When the tilt exceeds the limit, the alarm (31) is driven to issue an audible and visual warning, and the extension and retraction of the second electric cylinder (33) on each side is automatically adjusted to complete the horizontal correction of the vehicle body. A telescopic auxiliary walking wheel assembly is connected to the outer side of the outrigger outer cylinder (23) through the second connecting beam (34). The wheel assembly includes a fixed outer cylinder (35), a telescopic inner rod (36), an auxiliary wheel (37), and a third electric cylinder (38). The fixed outer cylinder (35) is connected to the outrigger outer cylinder (23) via a second connecting beam (34) and is also connected to the vertical beam plate (7) via a stabilizing frame (39). The upper end of the telescopic inner rod (36) is located in the fixed outer cylinder (35), and the lower end extends to the bottom of the fixed outer cylinder (35). The auxiliary wheel (37) is installed at the lower end of the telescopic inner rod (36). The third electric cylinder (38) is vertically fixed to the upper end of the fixed outer cylinder (35), and its piston rod is fixedly connected to the top end of the telescopic inner rod (36) to drive the telescopic inner rod (36) and the auxiliary wheel (37) to extend and retract as a whole. The third electric cylinder (38) is also electrically connected to the controller.

8. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The scaffold (4) includes scaffold horizontal bars (15), scaffold vertical bars (16), scaffold diagonal supports (19), reinforcing and fixing rods (25), and fixing sleeves (26). The foundation frame is provided with insertion slots or insertion pipes for inserting the scaffold vertical bars (16). The scaffold horizontal bars (15), scaffold vertical bars (16), and scaffold diagonal supports (19) are connected by fasteners. The fixing sleeves (26) are welded to the foundation frame. The reinforcing and fixing rods (25) are inserted into the fixing sleeves (26). The scaffold diagonal supports (19) are connected to the reinforcing and fixing rods (25) by fasteners. The extended scaffold (12) is connected to the upper end of the main scaffold (4) by fasteners.

9. The track-type maintenance trolley for blast furnace bottom maintenance according to claim 1, characterized in that, The material carrying structure is a material hoisting cage (2). The lifting mechanism includes a winch (10), a wire rope (11), a fixed pulley (14), and a fixed pulley hook (13). The winch (10) is installed on the foundation frame. The fixed pulley hook (13) is suspended on the extended scaffold (12). The fixed pulley (14) is installed on the fixed pulley hook (13). One end of the wire rope (11) is connected to the winch (10), and the other end passes around the fixed pulley (14) and is connected to the material hoisting cage (2).

10. A method for blast furnace bottom maintenance, comprising using a track-type maintenance trolley for blast furnace bottom maintenance as described in any one of claims 1-9 to perform blast furnace bottom maintenance operations, characterized in that, Includes the following steps: S100, Maintenance preparation: After the furnace bottom is ventilated and the gas is tested and found to be qualified, clean up the debris and obstacles at the furnace bottom; set up the maintenance trolley on the furnace bottom track (18), and after inspection and acceptance, push the trolley along the track into the predetermined position at the furnace bottom and lock the moving wheels (1). S200, Stable support: Adjust each telescopic outrigger (3) to the support position so that each telescopic outrigger (3) is pressed against the ground. Check the level of the trolley. Fine-tune the telescopic outrigger (3) until the level of the maintenance trolley meets the standard, and then lock the telescopic outrigger (3). S300 Load Acceptance: Start the material lifting mechanism, conduct no-load test lifting and load acceptance, and proceed with subsequent operations after the load acceptance is qualified. S400, Maintenance Operation: Maintenance personnel use a track-type maintenance trolley for blast furnace bottom maintenance to carry out maintenance operations on the blast furnace bottom; during the maintenance process, after the current maintenance position is completed, the telescopic support frame (3) is retracted, the moving wheels (1) are unlocked, and the maintenance trolley is moved along the bottom track to the next working position to continue maintenance operations until all maintenance operations are completed. S500 Recycling and Dismantling: After all maintenance work is completed, clean the platform and tools, reverse the operation to dismantle and remove the maintenance trolley from the bottom of the blast furnace.

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