Blast furnace air pipe dismounting and mounting device and using method

Abstract

The invention discloses a blast furnace air duct disassembling and assembling device and a using method, and relates to the technical field of metallurgical equipment, the blast furnace air duct disassembling and assembling device comprises a carrying trolley, a first lifting supporting frame, a second lifting supporting frame, a first limiting piece and a second limiting piece, and the carrying trolley comprises a carrying part and a trolley head; the first lifting support frame is arranged at the top of the carrying part, and the first lifting support frame limits the longitudinal direction of the air pipe; the second lifting support frame is arranged at the top of the carrying part and is arranged on one side of the first lifting support frame; the second lifting support frame is used for limiting the longitudinal direction of the air pipe; one end of the first limiting piece is used for fixing the side, close to the carrying part, of the vehicle head, and the first limiting piece can limit the air pipe in the transverse direction; the first limiting piece and the second limiting piece are arranged in parallel, one end of the second limiting piece is used for fixing a vehicle head, the second limiting piece can limit the air pipe in the transverse direction, the structure is simple, use is convenient, the labor efficiency is effectively improved, and operation safety is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to a blast furnace air duct disassembly and assembly device and a use method thereof. Background Art

[0002] During the blast furnace ironmaking process, raw materials such as ore and coke are loaded into the furnace through the top of the furnace. The air duct, as a key component, delivers high-temperature gas into the furnace, causing the iron ore to be continuously heated, decomposed, reduced, melted, and dripped. This process is not only complex and changeable, but also affected by factors such as the furnace environment, resulting in some incompletely melted charge, slag and other mixtures, or sticking to the furnace wall, or staying in inactive areas. Under certain conditions, these substances will block the air duct.

[0003] Common air duct blockages include the following:

[0004] Too much powder: After being blown by the air flow in the blast furnace, it is easy to enter the air duct along with the gas, causing blockage of the air duct.

[0005] The strength of the charge is low: it is easy to break into powder in the furnace, increasing the risk of air duct blockage.

[0006] Improper air volume control: Excessive or drastic air volume fluctuations may cause the airflow in the furnace to be unstable, carrying a large amount of charge powder into the air duct.

[0007] Uneven distribution: Uneven distribution will lead to unreasonable airflow distribution in the furnace, excessive local airflow, and easy to bring powder into the air duct.

[0008] The spray gun is clogged or damaged: If the spray gun is clogged or damaged, the sprayed material may not enter the furnace normally, but enter the air duct and cause blockage.

[0009] Damage to the air duct itself: If cracks or damage appear in the air duct, furnace charge or other debris may be sucked in during operation, causing blockage.

[0010] Therefore, air duct blockage is one of the common faults of blast furnaces. When this happens, the air duct must be replaced and repaired in time. When disassembling and assembling using the traditional method, there are still some problems. The specific problems are as follows:

[0011] Traditional disassembly relies on a large amount of manual labor and is inefficient;

[0012] The working space is limited, standardized operation cannot be achieved, the operation is difficult, and the air duct is very likely to be damaged during the disassembly and assembly process;

[0013] The traditional method of adjusting the height and position of the air duct is difficult and has many hidden dangers. Summary of the invention

[0014] The purpose of the present invention is to provide a blast furnace air duct disassembly and assembly device and a method for using the same, so as to solve the problems existing in the above-mentioned prior art. The device has a simple structure, is easy to use, effectively improves labor efficiency, and effectively ensures operation safety.

[0015] To achieve the above object, the present invention provides the following solutions:

[0016] The present invention provides a blast furnace air duct disassembly and assembly device, comprising: a carrying trolley, a first lifting support frame, a second lifting support frame, a first limiter and a second limiter, the carrying trolley can move and maintain the position after the movement, the carrying trolley comprises a carrying part and a trolley head; the first lifting support frame is arranged on the top of the carrying part, the first lifting support frame can rise or fall to support the bottom of the air duct and can limit the longitudinal direction of the air duct; the second lifting support frame is arranged on the top of the carrying part and on one side of the first lifting support frame, the second lifting support frame can rise or fall to support the bottom of the air duct and can limit the longitudinal direction of the air duct The bottom is supported and can limit the longitudinal direction of the air duct; one end of the first limiting member is used to fix the front of the vehicle close to the side of the carrying part, and the first limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib on one side of the air duct to press the air duct against the front of the vehicle and thus limit the air duct in the transverse direction; the first limiting member is arranged parallel to the first limiting member, and one end of the second limiting member is used to fix the front of the vehicle, and the second limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib on the other side of the air duct to press the air duct against the front of the vehicle and thus limit the air duct in the transverse direction.

[0017] Preferably, the first lifting support frame includes a first support platform, a first scissors support arm, a second scissors support arm and a first lifting cylinder, one end of the first scissors support arm and the second scissors support arm on the same side are both hingedly connected to the carrying part, the other ends of the first scissors support arm and the second scissors support arm on the same side are both slidably connected to the carrying part, the tops of the first scissors support arm and the second scissors support arm are both hingedly connected to the first support platform, the top of the first support platform matches the shape of the bottom of the air duct to limit the movement of the branch pipe in the longitudinal direction, the bottom of the first lifting cylinder is hingedly connected to the carrying part, and the top of the first lifting cylinder is hingedly connected to the first support platform.

[0018] Preferably, the first lifting support frame also includes a first scissors support rotating shaft and a first connecting rod, the two ends of the first scissors support rotating shaft are respectively rotatably connected to the first rotating shaft point of the first scissors support arm and the second rotating shaft point of the second scissors support arm, the two ends of the first connecting rod are respectively fixedly connected to the top on the same side of the first scissors support arm and the second scissors support arm, and the output end of the first lifting cylinder is hingedly connected to the first connecting rod.

[0019] Preferably, the second lifting support frame includes a second support platform, a third scissors support arm, a fourth scissors support arm and a second lifting cylinder, one end of the third scissors support arm and the fourth scissors support arm on the same side are both hingedly connected to the carrying part, the other ends of the third scissors support arm and the fourth scissors support arm on the same side are both slidably connected to the carrying part, the tops of the third scissors support arm and the fourth scissors support arm are both hingedly connected to the second support platform, the top of the second support platform matches the shape of the bottom of the air duct to limit the movement of the branch pipe in the longitudinal direction, and the middle part of the second support platform is provided with a accommodating cavity for placing the connecting flange of the air duct, the bottom of the second lifting cylinder is hingedly connected to the carrying part, and the top of the second lifting cylinder is hingedly connected to the second support platform.

[0020] Preferably, the second lifting support frame also includes a second scissors support rotating shaft and a second connecting rod, the two ends of the second scissors support rotating shaft are respectively rotatably connected to the third rotating shaft point of the third scissors support arm and the fourth rotating shaft point of the fourth scissors support arm, the two ends of the second connecting rod are respectively fixedly connected to the top on the same side of the third scissors support arm and the fourth scissors support arm, and the output end of the second lifting cylinder is hingedly connected to the second connecting rod.

[0021] Preferably, the first scissor support arm and the second scissor support arm are each provided with a first pulley at the bottom of one end away from the first lifting cylinder, and the third scissor support arm and the fourth scissor support arm are each provided with a second pulley at the bottom of one end away from the second lifting cylinder.

[0022] Preferably, the first limiting member includes a first cylinder tail seat, a first tensioning cylinder, a first cylinder mounting bracket and a first hook, the fixed end of the first tensioning cylinder is fixedly connected to the vehicle head through the first cylinder tail seat, the bottom of the first cylinder mounting bracket is fixedly connected to the carrying part, and the top is used to be fixedly connected to the fixed end of the first tensioning cylinder, the first hook is used to be rotatably connected to the output end of the first tensioning cylinder and can be maintained in a designed position, when the output end of the first tensioning cylinder drives the first hook to pass through the U-shaped hole of the oblique reinforcement, the oblique reinforcement can drive the first hook to rotate toward the vehicle head so that the first hook passes through the U-shaped hole of the oblique reinforcement, and the first hook after passing through the U-shaped hole of the oblique reinforcement can return to its position and engage with the oblique reinforcement when the first tensioning cylinder contracts.

[0023] Preferably, it also includes a first rotating shaft, a first torsion spring and a first limit block, the output end of the first tensioning cylinder is provided with a first groove, the first rotating shaft is fixedly connected to the first groove, the first curved hook is rotatably connected to the first rotating shaft, one end of the first torsion spring is used for being fixedly connected to the first rotating shaft, and the other end is used for being fixedly connected to the first curved hook, the first limit block can be detachably fixedly connected to a side of the first rotating shaft away from the fixed end of the first tensioning cylinder to limit the rotation position of the first curved hook, and the first torsion spring is used to drive the first curved hook to rotate and press the first limit block.

[0024] Preferably, the second position-limiting member has the same structure as the first position-limiting member, and a buffer pad is provided at a position where the vehicle head contacts the air duct.

[0025] The present invention provides a method for using the blast furnace air duct disassembly and assembly device as described in any one of the above items, comprising the following steps:

[0026] When the air duct needs to be replaced, the transport trolley is operated to reach the designated position, the first lifting support frame and the second lifting support frame are operated to lift up to support the bottom of the air duct while limiting the movement of the air duct in the longitudinal direction, and the connecting bolts above the air duct are removed;

[0027] The first limiting member and the second limiting member are operated to pass through the U-shaped holes of the oblique ribs on both sides of the air duct respectively to press the air duct against the front of the vehicle, thereby limiting the air duct in the lateral direction;

[0028] Operate the transport trolley to drag out the air duct and transfer it to the lifting position.

[0029] Compared with the prior art, the present invention has achieved the following technical effects:

[0030] The present invention provides a blast furnace air duct disassembly and assembly device and a use method. When the air duct needs to be replaced, the carrying trolley is operated to reach the specified position, the first lifting support frame and the second lifting support frame are operated to rise to support the bottom of the air duct while limiting the movement of the air duct in the longitudinal direction, and the connecting bolts above the air duct are removed; the first limiting member and the second limiting member are operated to pass through the U-shaped holes of the oblique ribs on both sides of the air duct respectively to press the air duct against the front of the vehicle and then limit the air duct in the lateral direction; the carrying trolley is operated to drag out the air duct and transfer it to the hoisting position. The structure is simple, the use is convenient, the labor efficiency is effectively improved, and the operation safety is effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A front view structural schematic diagram of a blast furnace air duct disassembly and assembly device provided by the present invention;

[0033] Figure 2 A diagram showing the first hook state when the first tensioning oil cylinder in the blast furnace air duct disassembly and assembly device provided by the present invention passes through the U-shaped hole;

[0034] Figure 3 A state diagram of the first hook in the blast furnace air duct disassembly and assembly device provided by the present invention being in a tensioned state after the first tensioning oil cylinder passes through the U-shaped hole;

[0035] Figure 4 A schematic diagram of the position of the first limit block in the blast furnace air duct disassembly and assembly device provided by the present invention;

[0036] Figure 5 for Figure 1 Sectional view at AA in the middle;

[0037] Figure 6 for Figure 1 Side view from the middle B direction;

[0038] In the figure: 1. air duct; 2. buffer pad; 3. front of the car; 4. tailstock of the first cylinder; 5. first tensioning cylinder; 6. first cylinder mounting bracket; 7. first hook; 8. first rotating shaft; 10. first limit block; 11. first supporting platform; 12. second supporting platform; 13. second pulley; 15. third articulated shaft; 16. third scissors supporting arm; 17. second scissors supporting rotating shaft; 18. second lifting cylinder; 19. second connecting rod; 20. carrying part; 21. wheel; 22. diagonal rib; 23. limit screw. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The purpose of the present invention is to provide a blast furnace air duct disassembly and assembly device and a method for using the same, so as to solve the problems existing in the above-mentioned prior art. The device has a simple structure, is easy to use, effectively improves labor efficiency, and effectively ensures operation safety.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Embodiment 1

[0043] The present embodiment provides a blast furnace air duct 1 disassembly and assembly device, including: a carrying trolley, a first lifting support frame, a second lifting support frame, a first limiter and a second limiter, the carrying trolley can move and maintain the position after the movement, the carrying trolley includes a carrying part 20 and a car head 3; the first lifting support frame is arranged at the top of the carrying part 20, the first lifting support frame can rise or fall to support the bottom of the air duct 1 and can limit the longitudinal direction of the air duct 1; the second lifting support frame is arranged at the top of the carrying part 20 and at one side of the first lifting support frame, the second lifting support frame can rise or fall To support the bottom of the air duct 1 and to limit the longitudinal direction of the air duct 1; one end of the first limiting member is used to fix the front of the vehicle 3 close to the side of the carrying part 20, and the first limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib 22 on one side of the air duct 1 to press the air duct 1 against the front of the vehicle 3 and thereby limit the air duct 1 in the transverse direction; the first limiting member is arranged parallel to the first limiting member, and one end of the second limiting member is used to fix the front of the vehicle 3, and the second limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib 22 on the other side of the air duct 1 to press the air duct 1 against the front of the vehicle 3 and thereby limit the air duct 1 in the transverse direction.

[0044] In a preferred scheme of the present embodiment, the first lifting support frame includes a first support platform 11, a first scissors support arm, a second scissors support arm and a first lifting cylinder. The ends on the same side of the first scissors support arm and the second scissors support arm are both hingedly connected to the carrying part 20. The carrying part 20 is provided with a first hinge seat and a second hinge seat. The first scissors support arm is hingedly connected to the first hinge seat through a first hinge axis, and the second scissors support arm is hingedly connected to the second hinge seat through a second hinge axis. The other ends on the same side of the first scissors support arm and the second scissors support arm are both slidingly connected to the carrying part 20. The tops of the first scissors support arm and the second scissors support arm are both hingedly connected to the first support platform 11. The top of the first support platform 11 matches the shape of the bottom of the air duct 1 to limit the movement of the branch pipe in the longitudinal direction. The bottom of the first lifting cylinder is hingedly connected to the carrying part 20, and the top of the first lifting cylinder is hingedly connected to the first support platform 11.

[0045] In a preferred scheme of the present embodiment, the first lifting support frame also includes a first scissors support rotating shaft 8 and a first connecting rod, the two ends of the first scissors support rotating shaft 8 are respectively rotatably connected to the first rotating shaft point of the first scissors support arm and the second rotating shaft point of the second scissors support arm, the two ends of the first connecting rod are respectively fixedly connected to the top on the same side of the first scissors support arm and the second scissors support arm, and the output end of the first lifting cylinder is hingedly connected to the first connecting rod.

[0046] In a preferred solution of the present embodiment, the second lifting support frame includes a second support platform 12, a third scissor support arm 16, a fourth scissor support arm and a second lifting cylinder 18, one end of the third scissor support arm 16 and the fourth scissor support arm on the same side are both hingedly connected to the carrier 20, and a third hinge seat and a fourth hinge seat are provided on the carrier 20, the third scissor support arm 16 is hingedly connected to the third hinge seat through a third hinge shaft 15, the fourth scissor support arm is hingedly connected to the fourth hinge seat through a fourth hinge shaft, and the third scissor support arm 16 is hingedly connected to the third hinge seat through a fourth hinge shaft. The other end on the same side as the fourth scissors support arm is slidably connected to the carrying part 20, the top of the third scissors support arm 16 and the fourth scissors support arm are hingedly connected to the second support platform 12, the top of the second support platform 12 matches the shape of the bottom of the air duct 1 to limit the movement of the branch pipe in the longitudinal direction, and the middle part of the second support platform 12 is provided with a accommodating cavity for placing the connecting flange of the air duct 1, the bottom of the second lifting cylinder 18 is hingedly connected to the carrying part 20, and the top of the second lifting cylinder 18 is hingedly connected to the second support platform 12.

[0047] In a preferred scheme of the present embodiment, the second lifting support frame also includes a second scissors support rotating shaft 17 and a second connecting rod 19, the two ends of the second scissors support rotating shaft 17 are respectively rotatably connected to the third rotating shaft point of the third scissors support arm 16 and the fourth rotating shaft point of the fourth scissors support arm, the two ends of the second connecting rod 19 are respectively fixedly connected to the top on the same side of the third scissors support arm 16 and the fourth scissors support arm, and the output end of the second lifting cylinder 18 is hingedly connected to the second connecting rod 19.

[0048] In a preferred solution of this embodiment, the first scissor support arm and the second scissor support arm are both provided with a first pulley at the bottom of one end away from the first lifting cylinder, and the third scissor support arm 16 and the fourth scissor support arm are both provided with a second pulley 13 at the bottom of one end away from the second lifting cylinder 18.

[0049] In a preferred scheme of the present embodiment, the first limiting member includes a first cylinder tail seat 4, a first tensioning cylinder 5, a first cylinder mounting bracket 6 and a first hook 7. The fixed end of the first tensioning cylinder 5 is fixedly connected to the vehicle head 3 through the first cylinder tail seat 4. The bottom of the first cylinder mounting bracket 6 is fixedly connected to the carrying part 20, and the top is used to be fixedly connected to the fixed end of the first tensioning cylinder 5. The first hook 7 is used to be rotatably connected to the output end of the first tensioning cylinder 5 and can be maintained in the designed position. When the output end of the first tensioning cylinder 5 drives the first hook 7 to pass through the U-shaped hole of the oblique reinforcement 22, the oblique reinforcement 22 can drive the first hook 7 to rotate toward the vehicle head 3 so that the first hook 7 passes through the U-shaped hole of the oblique reinforcement 22. After passing through the U-shaped hole of the oblique reinforcement 22, the first hook 7 can return to its position and engage the oblique reinforcement 22 when the first tensioning cylinder 5 contracts.

[0050] In a preferred scheme of the present embodiment, it also includes a first rotating shaft, a first torsion spring and a first limit block 10. The output end of the first tensioning cylinder 5 is provided with a first groove. The first rotating shaft is fixedly connected to the first groove. The first hook 7 is rotatably connected to the first rotating shaft. One end of the first torsion spring is used to be fixedly connected to the first rotating shaft, and the other end is used to be fixedly connected to the first hook 7. The first limit block 10 can be detachably fixedly connected to the side of the first rotating shaft away from the fixed end of the first tensioning cylinder 5 to limit the rotation position of the first hook 7. The first torsion spring is used to drive the first hook 7 to rotate and tighten the first limit block 10.

[0051] In a preferred solution of this embodiment, the second stopper has the same structure as the first stopper, and a buffer pad 2 is provided at the position where the front of the vehicle 3 is used to contact the air duct 1. The second stopper has the same structure as the first stopper, which ensures symmetrical limiting of both sides of the air duct 1 and improves the stability of the air duct 1. The provision of the buffer pad 2 reduces the collision and wear between the air duct 1 and the front of the vehicle 3, and protects the air duct 1 and the front of the vehicle 3.

[0052] Embodiment 2

[0053] This embodiment provides a method for using the blast furnace air duct 1 disassembly and assembly device as described in any one of the above items, comprising the following steps:

[0054] 1. Preparation

[0055] When the duct 1 of the blast furnace is blocked and needs to be replaced, the transport trolley is moved to the designated position. The transport trolley is provided with a counterweight, a battery, a motor, a hydraulic system, a control system, etc. The wheels 21 at the bottom of the transport trolley are made of steel wheels 21, and the transport part 20 is provided with other mechanism installation holes, fixed hinge holes and scissor support slides. Check whether each component on the transport trolley is operating normally and ensure that the hydraulic system, control system, etc. are in good condition.

[0056] 2. Duct 1 Disassembly Stage

[0057] The first lifting cylinder and the second lifting cylinder 18 are operated to rise, thereby respectively driving the first lifting support frame and the second lifting support frame to rise.

[0058] For the first lifting support frame:

[0059] The first lifting cylinder pushes the first connecting rod, causing the first scissor support arm and the second scissor support arm to rotate around the hinge point with the carrier 20 , while the other end of the first scissor support arm and the second scissor support arm on the same side slides on the carrier 20 .

[0060] The top of the first scissor support arm and the second scissor support arm push the first support platform 11 to rise, and the top of the first support platform 11 fits with the corresponding part of the bottom of the air duct 1 to stably support the air duct 1 and limit the longitudinal direction of the air duct 1.

[0061] For the second lifting support:

[0062] The second lifting cylinder 18 pushes the second connecting rod 19 to rotate the third scissor support arm 16 and the fourth scissor support arm around the hinge point with the carrying part 20 , while the other end of the third scissor support arm 16 and the fourth scissor support arm on the same side slides on the carrying part 20 .

[0063] The second supporting platform 12 rises, and its top fits with the corresponding part of the bottom of the air duct 1, stably supporting the air duct 1 and limiting the longitudinal direction of the air duct 1, and the accommodating cavity in the middle of the second supporting platform 12 is used to avoid the flange and the mounting bolts.

[0064] Remove the connecting bolts above the air duct 1.

[0065] Adjust the positions of the first limiting member and the second limiting member.

[0066] For the first stopper:

[0067] Adjust the position of the first limit block 10 to Figure 4 Position ① in the middle, and fix it with the limit screw 23, operate the tensioning oil cylinder 5, and after observing that the hook 7 completely passes through the U-shaped hole of the oblique rib 2222 of the air duct 1, the first tensioning oil cylinder 5 extends, driving the first hook 7 to move toward the air duct 1. When the first hook 7 contacts the U-shaped hole of the oblique rib 22 of the air duct 1, under the action of the hole, the first torsion spring is compressed, forcing the first hook 7 to rotate counterclockwise and close to the first tensioning oil cylinder 5, ensuring that it passes through the U-shaped hole smoothly.

[0068] After passing through the hole, under the action of the first torsion spring, the first hook 7 rotates clockwise to the limit position set by the first limit block 10 .

[0069] For the second limiting member, the action is the same as that of the first limiting member.

[0070] When the pressure reaches 0.5MPa, switch the oil circuit to the pressure-maintaining state, operate the transport trolley to drag out the air duct 1 and transfer it to a position convenient for lifting.

[0071] Without adjusting the height of the lifting device, operate the first tensioning oil cylinder 5 to extend, remove the limit screw 23, and move the limit block 10 from Figure 4 Move the position ① in the middle to the position ②, and then fix the position of the first limit block 10 with the limit screw 23 to ensure that the first hook 7 operates normally, and retract the first tensioning cylinder 5 to the left side of the oblique rib 22 of the air duct 1.

[0072] The same action awakens the operation of the second limiter, and then the blocked air duct 1 is lifted out using a lifting tool.

[0073] 3. Duct 1 Installation Phase

[0074] Place the fresh air duct 1 at the corresponding position of the transport vehicle.

[0075] Repeat the operation of the first tensioning cylinder 5 and the second tensioning cylinder to make the first hook 7 and the second hook pass through the U-shaped hole of the oblique rib 22 of the fresh air duct 1 and rotate to the set position of the limit block under the action of the torsion spring to achieve the tensioning effect.

[0076] The first tensioning oil cylinder 5 and the second tensioning oil cylinder extend to drive the first hook 7 and the second hook to move toward the air duct 1. Under the action of the hole position, the hook rotates through the hole position, and then rotates to the limit position under the action of the torsion spring.

[0077] After the transport trolley is operated to reach the designated position, the air duct 1 is inserted into the corresponding air outlet.

[0078] Adjust the first lifting cylinder and the second lifting cylinder 18, adjust the height position of the lifting device, and install the connecting bolts.

[0079] The first tensioning cylinder 5 and the second tensioning cylinder are retracted to lower the first supporting platform 11 and the second supporting platform 12 .

[0080] Maneuver the transport cart to drive away.

[0081] During the entire use process, there is no need to repeatedly adjust the height of the air duct 1 when replacing it, and the air outlet exposure process is remotely operated, which improves safety and efficiency.

[0082] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A blast furnace air duct disassembly and assembly device, characterized in that: include: A transport trolley, the transport trolley being capable of moving and maintaining a position after moving, the transport trolley comprising a transport portion and a vehicle head; A first lifting support frame, which is disposed on the top of the carrying portion, and can rise or fall to support the bottom of the air duct and limit the longitudinal direction of the air duct; A second lifting support frame, the second lifting support frame is arranged on the top of the carrying part and on one side of the first lifting support frame, the second lifting support frame can rise or fall to support the bottom of the air duct and can limit the longitudinal direction of the air duct; A first limiting member, one end of which is used to fix the front of the vehicle close to the carrying portion, and the first limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib on one side of the air duct to press the air duct against the front of the vehicle, thereby limiting the air duct in the transverse direction; as well as The second limiting member is arranged parallel to the first limiting member, one end of the second limiting member is used to fix the front of the vehicle, and the second limiting member can be extended or shortened to pass through the U-shaped hole of the oblique rib on the other side of the air duct to press the air duct against the front of the vehicle and thereby limit the air duct in the lateral direction.

2. The blast furnace air duct disassembly and assembly device according to claim 1, characterized in that: The first lifting support frame includes a first support platform, a first scissors support arm, a second scissors support arm and a first lifting cylinder, one end of the first scissors support arm and the second scissors support arm on the same side are both hingedly connected to the carrying part, the other ends of the first scissors support arm and the second scissors support arm on the same side are both slidably connected to the carrying part, the tops of the first scissors support arm and the second scissors support arm are both hingedly connected to the first support platform, the top of the first support platform matches the shape of the bottom of the air duct to limit the movement of the branch pipe in the longitudinal direction, the bottom of the first lifting cylinder is hingedly connected to the carrying part, and the top of the first lifting cylinder is hingedly connected to the first support platform.

3. The blast furnace air duct disassembly and assembly device according to claim 2, characterized in that: The first lifting support frame also includes a first scissors support rotating shaft and a first connecting rod. The two ends of the first scissors support rotating shaft are respectively rotatably connected to the first rotating shaft point of the first scissors support arm and the second rotating shaft point of the second scissors support arm. The two ends of the first connecting rod are respectively fixedly connected to the top on the same side of the first scissors support arm and the second scissors support arm. The output end of the first lifting cylinder is hingedly connected to the first connecting rod.

4. The blast furnace air duct disassembly and assembly device according to claim 3, characterized in that: The second lifting support frame includes a second support platform, a third scissors support arm, a fourth scissors support arm and a second lifting cylinder, one end of the third scissors support arm and the fourth scissors support arm on the same side are hingedly connected to the carrying part, the other ends of the third scissors support arm and the fourth scissors support arm on the same side are slidably connected to the carrying part, the tops of the third scissors support arm and the fourth scissors support arm are hingedly connected to the second support platform, the top of the second support platform matches the shape of the bottom of the air duct to limit the movement of the branch pipe in the longitudinal direction, and the middle part of the second support platform is provided with a accommodating cavity for placing the connecting flange of the air duct, the bottom of the second lifting cylinder is hingedly connected to the carrying part, and the top of the second lifting cylinder is hingedly connected to the second support platform.

5. The blast furnace air duct disassembly and assembly device according to claim 4, characterized in that: The second lifting support frame also includes a second scissors support rotating shaft and a second connecting rod. The two ends of the second scissors support rotating shaft are respectively rotatably connected to the third rotating shaft point of the third scissors support arm and the fourth rotating shaft point of the fourth scissors support arm. The two ends of the second connecting rod are respectively fixedly connected to the top on the same side of the third scissors support arm and the fourth scissors support arm. The output end of the second lifting cylinder is hingedly connected to the second connecting rod.

6. The blast furnace air duct disassembly and assembly device according to claim 5, characterized in that: A first pulley is provided at the bottom of the first scissor support arm and the second scissor support arm away from the first lifting cylinder, and a second pulley is provided at the bottom of the third scissor support arm and the fourth scissor support arm away from the second lifting cylinder.

7. The blast furnace air duct disassembly and assembly device according to claim 1, characterized in that: The first limiting member includes a first cylinder tail seat, a first tensioning cylinder, a first cylinder mounting bracket and a first hook. The fixed end of the first tensioning cylinder is fixedly connected to the vehicle head through the first cylinder tail seat. The bottom of the first cylinder mounting bracket is fixedly connected to the carrying part, and the top is used to be fixedly connected to the fixed end of the first tensioning cylinder. The first hook is used to be rotatably connected to the output end of the first tensioning cylinder and can be maintained in a designed position. When the output end of the first tensioning cylinder drives the first hook to pass through the U-shaped hole of the oblique reinforcement, the oblique reinforcement can drive the first hook to rotate toward the vehicle head so that the first hook passes through the U-shaped hole of the oblique reinforcement. After passing through the U-shaped hole of the oblique reinforcement, the first hook can return to its position and engage with the oblique reinforcement when the first tensioning cylinder contracts.

8. The blast furnace air duct disassembly and assembly device according to claim 7, characterized in that: It also includes a first rotating shaft, a first torsion spring and a first limit block. The output end of the first tensioning cylinder is provided with a first groove. The first rotating shaft is fixedly connected to the first groove. The first curved hook is rotatably connected to the first rotating shaft. One end of the first torsion spring is used to be fixedly connected to the first rotating shaft, and the other end is used to be fixedly connected to the first curved hook. The first limit block can be detachably fixedly connected to a side of the first rotating shaft away from the fixed end of the first tensioning cylinder to limit the rotation position of the first curved hook. The first torsion spring is used to drive the first curved hook to rotate and tighten the first limit block.

9. The blast furnace air duct disassembly and assembly device according to claim 7, characterized in that: The second position-limiting member has the same structure as the first position-limiting member, and a buffer pad is provided at a position where the vehicle head contacts the air duct.

10. A method for using the blast furnace air duct disassembly and assembly device according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the air duct needs to be replaced, the transport trolley is operated to reach the designated position, the first lifting support frame and the second lifting support frame are operated to lift up to support the bottom of the air duct while limiting the movement of the air duct in the longitudinal direction, and the connecting bolts above the air duct are removed; The first limiting member and the second limiting member are operated to pass through the U-shaped holes of the oblique ribs on both sides of the air duct respectively to press the air duct against the front of the vehicle, thereby limiting the air duct in the lateral direction; Operate the transport trolley to drag out the air duct and transfer it to the lifting position.

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