Iron-making factor ba buffer tank quick replacement device and replacement process thereof

Abstract

The application discloses a quick replacement device for a Feiba buffer tank of an iron-making and a replacement process thereof. The replacement device comprises a first frame and walking wheels arranged at the lower end of the first frame. The walking wheels walk along the inner tracks of the rotating drums on the left and right sides. A control system is arranged on the first frame. The control system comprises a walking control system and a lifting control system. A second frame is fixed to the middle part of the top end of the first frame. A lifting mechanism is fixed to the lower end of the second frame. A lifting hook assembly is arranged at the lower end of the lifting mechanism. The lifting hook assembly is used for lifting and transporting an inner distributor and a buffer tank. The application replaces manpower with the quick replacement device, improves the original construction process, improves construction safety and efficiency, reduces the labor intensity of workers and reduces the exposure time of workers in harsh working conditions.

Description

Technical Field

[0001] This invention belongs to the field of ironmaking waste slag treatment technology, specifically relating to a quick replacement device for an ironmaking inba buffer tank and its replacement process. Background Technology

[0002] The Impa process for slag treatment is widely used in blast furnace production in China, treating the waste slag generated during ironmaking. The buffer tank is a key piece of equipment in this process. The buffer tank is 1785mm long, 0.95mm wide, and 710mm high, and weighs approximately 1.12t. A simplified diagram of the buffer tank is shown below. Figure 1 As shown, the buffer groove is installed at the bottom of the inner distributor in the middle of the drum track. The middle width of the drum track is about 1700mm, and a total of 3 buffer grooves are installed inside the drum track. The distance between the two sides of the buffer groove and the track box beam is about 370mm.

[0003] After a period of use, the buffer tank needs to be replaced and repaired. Since the buffer tank is installed at the bottom of the inner distributor, the inner distributor must be removed first when replacing it. The existing replacement and repair process is to use manual pulling and electric hoisting. However, since the water slag contains a lot of glass fiber, the working environment is relatively harsh. In addition, the limited working space between the drum tracks makes the replacement and repair work more difficult, the safety of personnel is difficult to guarantee, and the maintenance efficiency is difficult to improve effectively. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a quick replacement device for the ironmaking inba buffer tank and its replacement process. By replacing manpower with the quick replacement device, the original construction process is improved, construction safety and efficiency are enhanced, the labor intensity of workers is reduced, and the exposure time of workers in harsh working conditions is reduced.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A quick-change device for an ironmaking inba buffer tank includes a first frame and traveling wheels disposed at the lower end of the first frame. The traveling wheels travel along the inner tracks of the drum on the left and right sides. A control system is provided on the first frame, and the control system includes a traveling control system and a lifting control system. A second frame is fixed at the middle of the top of the first frame, and a lifting mechanism is fixed at the lower end of the second frame. A hook assembly is provided at the lower end of the lifting mechanism, and the hook assembly is used to lift the inner distributor and the buffer tank.

[0007] Furthermore, the lifting mechanism includes a hydraulic device installed at the lower end of the second frame, and the hook assembly is located at the lower end of the piston rod of the hydraulic device.

[0008] Furthermore, the hydraulic device includes two hydraulic cylinders arranged side by side, which are equally spaced at the lower end of the second frame in the front-back direction. The hook assembly includes a connecting rod arranged horizontally in the front-back direction, which is located directly below the second frame. The lower ends of the piston rods of the two hydraulic cylinders are fixedly connected to the top end of the connecting rod, and multiple hooks are equally spaced at the lower end of the connecting rod in the front-back direction.

[0009] Furthermore, the control system is connected to a wireless remote controller.

[0010] Furthermore, the walking control system includes a motor fixed to the first frame, a first bevel gear mounted on the output shaft end of the motor, and a transmission shaft horizontally arranged in the left-right direction. A second bevel gear meshing with the first bevel gear is mounted on the transmission shaft, and synchronous pulleys are respectively mounted on the left and right ends of the transmission shaft. The walking wheels include two driving wheels and two driven wheels, and the four walking wheels are distributed at the four corners of the lower end of the first frame. The two synchronous pulleys are connected to the corresponding driving wheels by synchronous belts.

[0011] Furthermore, the first frame is a square frame, and vertical support legs are installed at the four corners of the lower end of the square frame; the second frame is a gantry frame arranged in the front-to-back direction.

[0012] A replacement process for a quick-change device for an ironmaking inba buffer tank includes the following steps:

[0013] (1) Disassembly of the internal distributor: Remove the bolts between the flange face of the internal distributor and the flange face of the granulation tower outlet device;

[0014] (2) Moving the replacement device in: Place the replacement device on the track inside the drum;

[0015] (3) Removal of inner distributor: Hang a steel rope at the center of gravity of the inner distributor hoisting, operate the replacement device to move above the center of gravity of the inner distributor hoisting, the lifting mechanism lowers to a certain height and connects to the steel rope through the hook assembly, then the lifting mechanism lifts the inner distributor, and the replacement device is operated to hoist the inner distributor to the outside of the drum and then stops and lowers the inner distributor.

[0016] (4) Removing the old buffer trough: Set up a lifting point on the old buffer trough and hang a steel rope. Control the replacement device to move above the old buffer trough to be replaced. The lifting mechanism descends and is connected to the steel rope through the hook assembly. Then the lifting mechanism lifts the old buffer trough. Control the replacement device to hoist the old buffer trough to the outside of the drum and then stop and lower the old buffer trough.

[0017] (5) Installation of new buffer tank: hoist the new buffer tank to the predetermined position, set up lifting points on the new buffer tank and hang steel ropes, connect the steel ropes to the hook assembly and lift the new buffer tank, operate the replacement device to move above the installation position of the new buffer tank and stop, the lifting mechanism descends, so that the new buffer tank falls into the predetermined installation position, remove the steel ropes, the lifting mechanism resets, operate the replacement device to move outside the drum, and then reinforce the new buffer tank;

[0018] (6) Inner distributor installation: Connect the steel rope that has not been removed from the inner distributor to the hook assembly, operate the replacement device to send the inner distributor to the predetermined position, the lifting mechanism descends, so that the inner distributor falls to the installation position, remove the steel rope and the lifting mechanism resets, operate the replacement device to move out of the inner track of the drum.

[0019] (7) Installation of internal distributor: The flange face of the internal distributor is fixed to the flange face of the granulation tower outlet device by bolts.

[0020] Furthermore, in step (3), the inner distributor is fixed by two 2000mm*φ12mm steel ropes in a bottom binding manner during hoisting; in step (4), four hoisting points are set on the old buffer trough and four 500mm*φ12mm steel ropes are hung there; in step (5), four hoisting points are set on the new buffer trough and four 500mm*φ12mm steel ropes are hung there.

[0021] Further, in step (2), the replacement device is hoisted onto the inner track of the drum by the upper electric hoist; in step (3), after the inner distributor is removed, the upper electric hoist is used to place the inner distributor into a safe position; in step (4), after the old buffer tank is removed, the upper electric hoist is used to place the old buffer tank into a safe position; in step (5), the upper electric hoist is used to hoist the new buffer tank into a predetermined position; in step (6), the replacement device is operated, and the upper electric hoist cooperates, to send the inner distributor into the predetermined position.

[0022] Furthermore, the movement and lifting motion of the replacement device can be controlled via a wireless remote control.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Compared with the traditional ironmaking Inba buffer tank replacement and maintenance process, this invention optimizes the process of relying on manual brute force to pull the buffer tank during replacement. This invention uses mechanical devices to replace manpower, which can greatly reduce the labor intensity of operators and reduce the exposure time of operators in harsh environments, thereby reducing the risk factor of the operation and ensuring the safety of the operation.

[0025] 2. This invention employs electronic control, hydraulic and wireless remote control technologies, making the maintenance process more automated and intelligent, significantly improving maintenance efficiency, shortening maintenance time, and reducing the need for maintenance personnel, thereby reducing maintenance costs and providing effective protection for the safe production of blast furnaces. Attached Figure Description

[0026] Figure 1 This is a simplified diagram of the buffer tank in this invention;

[0027] Figure 2 This is a three-dimensional structural schematic diagram of the quick replacement device for the ironmaking inba buffer tank in this invention.

[0028] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure from another direction;

[0029] Figure 4 A three-dimensional structural diagram of the hook assembly of the replacement device after it is connected to the steel rope of the inner distributor.

[0030] Figure 5 A three-dimensional structural diagram of the inner distributor moving out of the inner track of the drum;

[0031] Figure 6 A three-dimensional structural diagram of the hook assembly of the replacement device after it is connected to the old buffer groove steel rope;

[0032] Figure 7 A three-dimensional structural diagram of the old buffer groove being removed from the inner track of the drum;

[0033] Figure 8 This is a physical image of the quick-change device for the ironmaking inba buffer tank in this invention.

[0034] The following are the labels in the attached diagram: 1. First frame; 2. Inner track of the drum; 3. Control system; 4. Second frame; 5. Inner distributor; 6. Buffer groove; 7. Hydraulic cylinder; 8. Connecting rod; 9. Hook; 10. Motor; 11. Drive shaft; 12. Synchronous pulley; 13. Driving pulley; 14. Driven pulley; 15. Synchronous belt; 16. Support leg; 17. Steel rope. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] In the description of this invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] like Figure 2 and 3 As shown, a quick-change device for an ironmaking inba buffer tank according to the present invention includes a first frame 1 and traveling wheels disposed at the lower end of the first frame 1. The traveling wheels travel along the inner tracks 2 of the drum on the left and right sides. A control system 3 is provided on the first frame 1. The control system 3 includes a traveling control system and a lifting control system. The control system 3 is connected to a wireless remote controller. A second frame 4 is fixed at the middle of the top of the first frame 1. A lifting mechanism is fixed at the lower end of the second frame 4. A hook assembly is provided at the lower end of the lifting mechanism. The hook assembly is used to lift the inner distributor 5 and the buffer tank 6. The lifting mechanism includes a hydraulic device installed at the lower end of the second frame 4. The hook assembly is located at the lower end of the piston rod of the hydraulic device.

[0039] The inner distributor 5 is installed between the inner tracks 2 of the drums on the left and right sides, and the buffer groove 6 is installed at the bottom of the inner distributor 5.

[0040] The hydraulic device includes two hydraulic cylinders 7 arranged side by side, and the two hydraulic cylinders 7 are equally spaced at the lower end of the second frame 4 in the front-back direction. The hook assembly includes a connecting rod 8 arranged horizontally in the front-back direction, and the connecting rod 8 is located directly below the second frame 4. The lower ends of the piston rods of the two hydraulic cylinders 7 are fixedly connected to the top end of the connecting rod 8, and multiple hooks 9 are equally spaced at the lower end of the connecting rod 8 in the front-back direction.

[0041] The walking control system includes a motor 10 fixed on the first frame 1. A first bevel gear is installed at the end of the output shaft of the motor 10. The walking control system also includes a transmission shaft 11 arranged horizontally in the left-right direction. A second bevel gear that meshes with the first bevel gear is installed on the transmission shaft 11. Synchronous pulleys 12 are respectively installed at the left and right ends of the transmission shaft 11. The walking wheels include two driving pulleys 13 and two driven pulleys 14. The four walking wheels are distributed at the four corners of the lower end of the first frame 1. The two synchronous pulleys 12 and the corresponding driving pulleys 13 are respectively connected by synchronous belts 15.

[0042] The first frame 1 is a square frame, and vertical support legs 16 are installed at the four corners of the lower end of the square frame; the second frame 4 is a gantry frame arranged in the front-to-back direction.

[0043] A replacement process for a quick-change device for an ironmaking inba buffer tank includes the following steps:

[0044] (1) Disassembly of the internal distributor: Remove the bolts between the flange face of the internal distributor 5 and the flange face of the granulation tower outlet device;

[0045] (2) Moving the replacement device in: The replacement device is hoisted onto the inner track 2 of the drum by the 10t electric hoist above;

[0046] (3) Removal of the inner distributor: Two 2000mm*φ12mm steel cables 17 are hung at the center of gravity of the inner distributor 5 and secured with a bottom-binding method. The replacement device is moved above the center of gravity of the inner distributor 5 by a wireless remote control. The lifting mechanism is lowered by about 300mm by the wireless remote control and connected to the steel cables 17 through the hook 9 of the hook assembly. Figure 4 As shown, after confirming the hanging point is secure, operate the lifting mechanism to raise the inner distributor 5 to a height of approximately 300mm. Then, operate the changing device to hoist the inner distributor 5 to the outside of the drum, stop, and lower the inner distributor 5. Figure 5 As shown, the inner distributor 5 is then placed in a safe position using the 10t electric hoist above.

[0047] (4) Removal of the old buffer trough: Four reliable lifting points are set on the old buffer trough 6, and four 500mm*φ12mm steel cables 17 are hung there. The replacement device is operated by a wireless remote control to move the replacement device above the old buffer trough 6 to be replaced. The lifting mechanism is lowered by about 500mm by the wireless remote control, and the hook 9 of the hook assembly is connected to the steel cable 17. Figure 6As shown, after confirming the hanging points are secure, operate the lifting mechanism to raise the old buffer tank 6 to a height of approximately 500mm. Then, operate the replacement device to hoist the old buffer tank 6 to the outside of the drum, stop, and lower the old buffer tank 6. Figure 7 As shown, the old buffer tank 6 is then placed in a safe position using the 10t electric hoist above.

[0048] (5) Installation of the new buffer trough: The new buffer trough 6 is hoisted to the predetermined position by the 10t electric hoist above. Four lifting points are set on the new buffer trough 6 and four 500mm*φ12mm steel ropes 17 are hung. The steel ropes 17 are connected to the hooks 9 of the hook 9 assembly and the new buffer trough 6 is lifted. The replacement device is operated by the wireless remote control so that the replacement device moves to the installation position of the new buffer trough 6 and then stops. The lifting mechanism is controlled by the wireless remote control to lower the new buffer trough 6 to the predetermined installation position. Then the steel ropes 17 are removed, the lifting mechanism is reset, and the replacement device is moved to the outside of the drum. The new buffer trough 6 is then reinforced.

[0049] (6) Installation of inner distributor: Connect the two 2000mm*φ12mm steel ropes 17 of the inner distributor 5 that have not been removed to the hook 9 of the hook 9 assembly. Control the replacement device with a wireless remote control and cooperate with the 10t electric hoist above to send the inner distributor 5 into the predetermined position. Control the lifting mechanism to lower the inner distributor 5 to the installation position with a wireless remote control. After removing the steel ropes 17, the lifting mechanism is reset. Then, control the replacement device to move out of the inner track 2 of the drum. Then, lift the replacement device away from the maintenance area. Perform the 6S work of the replacement device on the ground. Then, transport the replacement device to the designated point for storage for the next use.

[0050] (7) Installation of internal distributor: Connect the flange face of the internal distributor 5 to the flange face of the granulation tower outlet device with bolts, ensuring that the bolts are tightened in place and that there is no water leakage during the test run.

[0051] As shown in Table 1, compared with the traditional ironmaking Inba buffer tank replacement and maintenance process, the replacement process of the quick replacement device for ironmaking Inba buffer tanks of the present invention significantly improves the maintenance efficiency of each process in the steps of removing the inner distributor, removing the old buffer tank, installing the new buffer tank, and installing the inner distributor. This replacement process not only improves maintenance efficiency but also greatly reduces the labor intensity of operators and ensures the safety of operations, thereby reducing the cost of maintenance operations.

[0052] Table 1 Comparison of working hours before and after process improvement

[0053]

[0054] As shown in Table 1, by using the quick replacement device for the ironmaking inba buffer tank of the present invention, the personnel input for maintenance can be reduced and the construction time can be shortened, thus having considerable economic benefits and providing effective guarantee for the production of blast furnace.

[0055] As shown in Table 1, by improving the replacement process, the cost of maintenance can be greatly reduced, the workload of operators can be reduced, the efficiency of maintenance operations can be greatly improved, and the safety management risks can be reduced, which has positive social benefits.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A process for replacing a quick replacement device of a flash tank of an ironmaking plant, characterized in that: The device for quickly replacing the buffer tank of the ironmaking cause includes a first frame (1) and a walking wheel arranged at the lower end of the first frame (1), the walking wheel walks along the inner rail (2) of the left and right sides of the rotating drum, the first frame (1) is provided with a control system (3), the control system (3) includes a walking control system and a lifting control system; the top end of the first frame (1) is fixedly provided with a second frame (4), the lower end of the second frame (4) is fixedly provided with a lifting mechanism, the lower end of the lifting mechanism is provided with a lifting hook assembly, the lifting hook assembly is used for lifting the inner distributor (5) and the buffer tank (6); ​ The replacement process of the device for quickly replacing the buffer tank of the ironmaking cause includes the following steps: (1) Inner distributor disassembly: remove the bolts between the flange surface of the inner distributor (5) and the flange surface of the granulation tower outlet device; (2) Replacement device enters: place the replacement device on the inner rail (2) of the rotating drum; (3) Inner distributor moves out: hang a steel wire (17) at the hoisting gravity center point of the inner distributor (5), control the replacement device to move above the hoisting gravity center point of the inner distributor (5), lower the lifting mechanism by a certain height, connect the lifting hook (9) assembly and the steel wire (17), then lift the inner distributor (5) by the lifting mechanism, control the replacement device to hoist the inner distributor (5) to the outside of the rotating drum, stop and lower the inner distributor (5); (4) Old buffer tank moves out: set a lifting point on the old buffer tank (6) and hang a steel wire (17), control the replacement device to move above the old buffer tank (6) to be replaced, lower the lifting mechanism and connect the lifting hook (9) assembly and the steel wire (17), then lift the old buffer tank (6) by the lifting mechanism, control the replacement device to hoist the old buffer tank (6) to the outside of the rotating drum, stop and lower the old buffer tank (6); (5) New buffer tank is loaded: hoist the new buffer tank (6) to the predetermined position, set a lifting point on the new buffer tank (6) and hang a steel wire (17), connect the steel wire (17) and the lifting hook (9) assembly and lift the new buffer tank (6), control the replacement device to move above the installation position of the new buffer tank (6) and stop, lower the lifting mechanism, make the new buffer tank (6) fall in the predetermined installation position, remove the steel wire (17), reset the lifting mechanism, control the replacement device to move to the outside of the rotating drum, then reinforce the new buffer tank (6); (6) Inner distributor loading: connect the steel wire (17) not removed from the inner distributor (5) and the lifting hook (9) assembly, control the replacement device to send the inner distributor (5) to the predetermined position, lower the lifting mechanism, make the inner distributor (5) fall in the installation position, remove the steel wire (17), reset the lifting mechanism, control the replacement device to move out of the inner rail (2) of the rotating drum; (7) Inner distributor installation: connect and fix the flange surface of the inner distributor (5) and the flange surface of the granulation tower outlet device by bolts.

2. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: The lifting mechanism includes a hydraulic device arranged at the lower end of the second frame (4), and the lifting hook assembly is arranged at the lower end of the piston rod of the hydraulic device.

3. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 2, characterized in that: The hydraulic device comprises two hydraulic cylinders (7) arranged side by side, the two hydraulic cylinders (7) are equidistantly arranged at the lower end of the second frame (4) in the front-rear direction, the hook assembly comprises a connecting rod (8) arranged horizontally in the front-rear direction, the connecting rod (8) is directly below the second frame (4), the lower end of the piston rod of the two hydraulic cylinders (7) is fixedly connected to the top end of the connecting rod (8), and the lower end of the connecting rod (8) is equidistantly provided with a plurality of hooks (9) in the front-rear direction.

4. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: The control system (3) is connected with a wireless remote controller.

5. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: The walking control system comprises a motor (10) fixed to the first frame (1), a first bevel gear is mounted at the output shaft end of the motor (10), the walking control system further comprises a transmission shaft (11) arranged horizontally in the left-right direction, a second bevel gear meshing with the first bevel gear is mounted on the transmission shaft (11), synchronous wheels (12) are respectively mounted at the left and right ends of the transmission shaft (11), and the walking wheels comprise two driving wheels (13) and two driven wheels (14).

6. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: The first frame (1) is a square frame, vertical legs (16) are respectively mounted at the lower end of the four corners of the square frame; and the second frame (4) is a gantry frame arranged in the front-rear direction.

7. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: In step (3), two 2000mm*φ12mm steel ropes (17) are used to fix the inner distributor (5) in a bottom-holding and binding manner during hoisting; in step (4), four hoisting points are arranged on the old buffer groove (6), and four 500mm*φ12mm steel ropes (17) are hung on the hoisting points; and in step (5), four hoisting points are arranged on the new buffer groove (6), and four 500mm*φ12mm steel ropes (17) are hung on the hoisting points.

8. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: In step (2), the replacement device is hoisted onto the inner rail (2) of the rotating drum by the overhead electric hoist; in step (3), the inner distributor (5) is placed in a safe position by the overhead electric hoist after the inner distributor (5) is moved out; in step (4), the old buffer groove (6) is placed in a safe position by the overhead electric hoist after the old buffer groove (6) is moved out; in step (5), the new buffer groove (6) is hoisted to a predetermined position by the overhead electric hoist; and in step (6), the replacement device is controlled, and the overhead electric hoist is cooperated to send the inner distributor (5) to the predetermined position.

9. A process for replacing the flash tank of a flash tank and surge tank arrangement for ironmaking according to claim 1, characterized in that: The walking and lifting actions of the replacement device are controlled by the wireless remote controller.

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