Repairing device and method for converter coupler of steel plant

Abstract

The invention belongs to the technical field of coupler repairing, and particularly discloses a steel plant converter coupler repairing device which comprises a workbench and bearings, a mounting plate is fixedly connected to the workbench, the outer ring of one bearing is fixedly connected with the mounting plate, a rotating cylinder is fixedly connected to the inner ring of the bearing, threads are arranged on the inner wall of the rotating cylinder, and a rotating handle is fixedly connected to one end of the rotating cylinder. A screw rod is in threaded connection with the interior of the rotary drum, the other end of the screw rod is fixedly connected with the inner ring of the other bearing, a connecting plate is fixedly connected to the outer ring of the other bearing, short rods are hinged to the two ends of the connecting plate, clamping fixing rods are hinged to the other ends of the short rods, a second mounting plate is hinged to the clamping fixing rods, and the second mounting plate is fixedly connected with the workbench. The clamping and fixing rods are synchronously opened and closed by driving the lead screws, so that the arc-shaped plates automatically adapt to and clamp couplings with different diameters, the couplings are fixed, and the problem that in the prior art, a universal fixing device for repairing the couplings cannot adapt to the couplings with different specifications, and consequently the repairing work efficiency is low is solved.

Description

Technical Field

[0001] This invention relates to the field of coupling repair technology, specifically to a repair device and method for converter couplings in steel plants. Background Technology

[0002] In steelmaking plant production systems, converters, as the core equipment in the iron and steel smelting process, rely on couplings for power transmission in key units such as their tilting system, oxygen lance lifting, and flue gas dust removal. Converter couplings often employ heavy-duty structures such as drum-tooth and universal joint types, making them core components with a high failure rate in the transmission system. Due to long-term operation under harsh conditions of high temperature, heavy load, impact load, and dust erosion, they are prone to failures such as tooth surface wear, tooth root cracks, elastomer aging and failure, bolt loosening and breakage, and excessive clearance in the shaft-hole fit.

[0003] Currently, steel plants face the following problems in repairing converter couplings: I. The traditional solution of replacing the coupling has a long procurement cycle, usually 7-15 days, and the cost of spare parts is high. The downtime for replacement will also cause the converter production line to be shut down for a long time, resulting in huge economic losses.

[0004] Second, conventional welding repair methods are prone to generating welding stress during the welding process, which can lead to new cracks in the coupling teeth or shaft holes. Furthermore, the hardness and wear resistance of the welded parts are difficult to match the original component standards, resulting in a short service life after repair and failing to meet the requirements of heavy-duty working conditions.

[0005] 3. Ordinary surface spraying repair method has weak adhesion between the coating and the substrate, and is prone to peeling off under impact load, resulting in unstable repair effect.

[0006] In addition to the problems mentioned above, the lack of dedicated fixing devices during the repair of such couplings makes them prone to displacement or vibration. Especially during welding, thermal deformation caused by high temperatures and welding stress may cause component misalignment and secondary damage. Furthermore, different specifications of couplings vary in size, and universal fixing devices cannot flexibly adapt to various sizes of couplings. This leads to frequent tooling changes during the repair process, resulting in low repair efficiency. Relying on manual clamping and fixing can easily cause components to fall off during the repair process, posing certain safety hazards.

[0007] In summary, it is necessary to design a repair device and method for converter couplings in steel plants to solve the problem that the existing general-purpose fixing devices for repairing couplings cannot be adapted to couplings of different specifications, resulting in low repair efficiency. Summary of the Invention

[0008] The purpose of this invention is to provide a repair device and method for converter couplings in steel plants, so as to solve the problem that the general fixing device for repairing couplings under the existing technology cannot be adapted to couplings of different specifications, resulting in low repair efficiency.

[0009] To achieve the above objectives, the basic solution provided by this invention is as follows: a repair device for a converter coupling in a steel plant, comprising a workbench and two bearings. A first mounting plate is fixedly connected to the workbench, and a rotating cylinder movably passes through the first mounting plate. The outer ring of one bearing is fixedly connected to the first mounting plate, and the inner ring of the bearing is fixedly connected to the rotating cylinder. The inner wall of the rotating cylinder is threaded. A handle is fixedly connected to one end of the rotating cylinder, and a lead screw is threaded into the rotating cylinder. The other end of the lead screw is fixedly connected to the inner ring of the other bearing. A connecting plate is fixedly connected to the outer ring of the other bearing. Short rods are hinged to both ends of the connecting plate, and a clamping and fixing rod is hinged to the other end of the short rods. A second mounting plate is hinged to the clamping and fixing rod, and the second mounting plate is fixedly connected to the workbench.

[0010] The beneficial effects of the present invention are as follows: (1) The present invention drives the screw through the rotating drum and then enables the clamping and fixing rod to open and close synchronously through the hinged connecting plate and the short rod, so that the arc plate automatically adapts to and clamps couplings of different diameters, thereby achieving the fixing of the coupling; (2) The repair method of the present invention quickly solves the sudden equipment failure, ensures the normal continuous production of the converter, stabilizes the production rhythm, and ensures that the product quality and output are always kept at a high level; secondly, it successfully reduces the economic losses caused by equipment shutdown; (3) The repair method of the present invention is simple and easy to operate, without the need for complex equipment and high-end operating technology. Ordinary machinists and maintenance workers can master the operation method after short-term training, which greatly reduces the dependence on technical personnel.

[0011] Option 2, a preferred embodiment of the basic option, consists of a long rod and an arc-shaped plate. The long rod and the arc-shaped plate are fixedly connected, and the connection between the long rod and the arc-shaped plate is hinged to the second mounting plate. A rubber pad is provided on the inner side of the arc-shaped plate. The arc-shaped plate can fit more closely to the outer ring of the coupling, and the rubber pad can increase friction while preventing excessive clamping and damage to the coupling.

[0012] Option 3, a preferred option of the basic option, features a mounting rod on the workbench with a cavity inside. A rotating rod is movably fitted within the cavity, and a fixed seat is located at the other end of the rotating rod. A hydraulic cylinder is fixedly connected to the fixed seat, and a pressure plate is located at the telescopic end of the hydraulic cylinder. A second bearing is fixedly connected to the rotating rod, and the outer ring of the second bearing is fixedly connected to the mounting rod. A second handle is located on the rotating rod. By integrating the equipment and fixing devices required for pressure fitting in the repair step onto the workbench, the repair efficiency of the coupling is improved.

[0013] Option 4, a preferred option of the basic option, is provided with limiting holes on the mounting rod and the rotating rod, and bolts are threaded onto the limiting holes; the limiting holes and bolts can fix the rotating rod and prevent it from rotating accidentally during press-fitting, thereby ensuring the stability of the processing.

[0014] Option 5, a method for repairing converter couplings in steel plants, includes the following steps: S1: Preparation: First, the staff will remove the oil and rust from the coupling to be welded. Then, the crane coupling with a bore diameter of Ф65mm or Ф150mm will be preheated and fixed on the repair device. S2: Welding: If a Ф65mm bore diameter crane coupling is used to replace the damaged coupling, the inner ring of the crane coupling is welded using 507 welding rods and open welding. During the welding process, the operator measures the inner diameter of the coupling using a micrometer and an inside diameter gauge to ensure that the inner diameter of the welded coupling is Ф63mm. If a Ф150mm bore diameter crane coupling is used to replace the damaged coupling, the original bore of the coupling is heated and a Ф80mm insert is inserted. Then, a hole is drilled at the connection between the insert and the coupling, and a threaded rod is installed for fixation. The end face of the coupling is then ground flat and preheated. Finally, the connection between the insert and the coupling is welded and fixed using open welding. The repair methods for two different bore diameter couplings were clearly defined, which are highly operable. At the same time, micrometers and inside diameter gauges were used for real-time measurement during the welding process to ensure the dimensions after repair.

[0015] Option 6, which is the preferred option of Option 5, involves the following steps in S1 for removing oil and rust from the coupling: Step 1: Soaking: First, soak the coupling bushing in diesel or kerosene for 10-30 minutes to fully soften and dissolve the oil mist on the bushing; Step 2: Scrubbing and rinsing: Then use a stiff-bristled brush dipped in cleaning solution to scrub the inner and outer surfaces of the bushing, as well as the oil grooves and gaps. Next, use carburetor cleaner to spray the scrubbed bushing, and then use cleaning solution to rinse the bushing. Step 3: Drying: Then use compressed air to blow dry the cleaned bushing, ensuring that the cleaning fluid inside and outside the bushing is completely dry; Step 4: Inspection: Finally, check whether there is any residual glue or wear on the inner hole and surface of the bushing after drying; Before welding, the coupling should be cleaned of oil and rust to avoid defects such as welding porosity and slag inclusions during subsequent welding, thereby ensuring the strength of the weld.

[0016] Option 7, which is a preferred option of Option 5, involves preheating couplings with a bore diameter of Ф65mm at a temperature of 250-300℃ and couplings with a bore diameter of Ф150mm at a temperature of 300-350℃ in S1. Preheating couplings with different bore diameters can prevent the formation of hardened structures and cold cracks during welding.

[0017] Option 8, which is a preferred option of Option 5, involves heating the original hole of the crane coupling to 160°C before inserting the bushing in S2. Heating the coupling causes the hole to expand, which reduces the pressing force and avoids deformation caused by strong mechanical pressure, thus ensuring a tight fit between the bushing and the coupling hole wall.

[0018] Option 9, which is the preferred option of Option 5, has a welding current of 140A and an arc voltage of 21V in S2. Attached Figure Description

[0019] Figure 1 This is a perspective view of a repair device for a converter coupling in a steel plant according to the present invention; Figure 2 This is a front view of a repair device for a converter coupling in a steel plant according to the present invention; Figure 3 This is a top view of a repair device for a converter coupling in a steel plant according to the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below through specific embodiments: The accompanying drawings in the instruction manual include: 1. Workbench; 2. Bearing 1; 3. First mounting plate; 4. Rotary drum; 5. Rotary handle 1; 6. Lead screw; 7. Connecting plate; 8. Short rod; 9. Clamping and fixing rod; 91. Long rod; 92. Arc plate; 10. Second mounting plate; 11. Mounting rod; 12. Rotary rod; 13. Fixed seat; 14. Hydraulic cylinder; 15. Press plate; 16. Bearing 2; 17. Rotary handle 2; 18. Limiting hole; 19. Bolt.

[0021] Example like Figures 1 to 3As shown, a repair device for a converter coupling in a steel plant includes a workbench 1 and two bearings 2. A first mounting plate 3 and a mounting rod 11 are fixedly connected to the workbench 1. A rotating cylinder 4 is movably inserted through the first mounting plate 3. The outer ring of one bearing 2 is fixedly connected to the first mounting plate 3, and the inner ring of the bearing 2 is fixedly connected to the rotating cylinder 4. The inner wall of the rotating cylinder 4 is threaded. A handle 5 is fixedly connected to one end of the rotating cylinder 4. A lead screw 6 is threaded into the rotating cylinder 4. The other end of the lead screw 6 is fixedly connected to the inner ring of the other bearing 2. A connecting plate 7 is fixedly connected to the outer ring of the other bearing 2. Short rods 8 are hinged to both ends of the connecting plate 7. A clamping and fixing rod 9 is hinged to the other end of the short rods 8. The clamping and fixing rod 9 consists of a long rod 91 and... The system consists of an arc-shaped plate 92, with a rubber pad on the inner side of the arc-shaped plate 92. A long rod 91 is fixedly connected to the arc-shaped plate 92. A second mounting plate 10 is hinged at the connection between the long rod 91 and the arc-shaped plate 92. The second mounting plate 10 is fixedly connected to the worktable 1. A cavity is provided inside the mounting rod 11. A rotating rod 12 is movably sleeved in the cavity. A fixed seat 13 is provided at the other end of the rotating rod 12. A hydraulic cylinder 14 is fixedly connected to the fixed seat 13. A pressure plate 15 is provided at the telescopic end of the hydraulic cylinder 14. A second bearing 16 is fixedly connected to the rotating rod 12. The outer ring of the second bearing 16 is fixedly connected to the mounting rod 11. A second handle 17 is provided on the rotating rod 12. Limiting holes 18 are provided on the mounting rod 11 and the rotating rod 12. Bolts 19 are threadedly connected to the limiting holes 18.

[0022] Based on the aforementioned repair device for converter couplings in steel plants, a repair method for converter couplings in steel plants is provided, specifically including the following steps: S1: Preparation: First, the workers will degrease and remove rust from the coupling to be welded. The specific steps are as follows: First, soak the coupling's bushing in diesel or kerosene for 10-30 minutes to fully soften and dissolve the oil mist on the bushing; then, use a stiff brush dipped in cleaning solution to scrub the inner and outer surfaces of the bushing, as well as the oil grooves and gaps; next, use carburetor cleaner to spray the scrubbed bushing, and then rinse the bushing with cleaning solution; then, use compressed air to blow the rinsed bushing dry, ensuring that the cleaning solution inside and outside the bushing is completely dry; finally, inspect the inner hole and surface of the dried bushing. Check for residual adhesive or wear; then preheat the Ф65mm diameter crane coupling to 250-300℃ or the Ф150mm diameter crane coupling to 300-350℃. Place the preheated crane coupling on the workbench 1, positioning it between the two arc plates 92. Then, the operator turns the handle 5, causing the handle 5 to drive the drum 4 to rotate, which in turn causes the lead screw 6 to extend and pushes the connecting plate 7 to move to one side, thereby moving the short rod 8 and the clamping and fixing rod 9, so that the two arc plates 92 are clamped inward, thus fixing the coupling to be repaired. S2: Welding: If a crane coupling with a bore diameter of Ф65mm is used to replace the damaged coupling, then 507 welding rods are used to weld the inner ring of the crane coupling using open welding. The welding current is 140A and the arc voltage is 21V. During the welding process, the workers use a micrometer and an inside diameter gauge to measure the inner diameter of the coupling so that the inner diameter of the welded coupling is Ф63mm. S3: If a Ф150mm diameter crane coupling is used to replace the damaged coupling, first heat the original hole of the coupling to 160℃ and then insert a Ф80mm bushing. Next, the operator rotates the lever 12 using the second throttle 16 to position the hydraulic cylinder 14 above the coupling. Then, screw the bolt 19 into the limiting hole 17 for fixation. Next, start the hydraulic cylinder 14 to insert the bushing into the coupling, and then close the hydraulic cylinder 14. Then, rotate the second throttle 16 in the opposite direction to move the hydraulic cylinder 14 away from the coupling. Then, screw the bolt 18 into the limiting hole 17 for fixation. Next, the operator drills a hole at the connection between the bushing and the coupling and installs a threaded rod for reinforcement. Then, grind the end face of the coupling flat and preheat it to 300-350℃ again. Finally, weld the connection between the bushing and the coupling using surface welding.

[0023] In summary, the above repair methods can quickly resolve sudden malfunctions in converter equipment, ensuring normal and continuous converter production, stabilizing the production rhythm, and ensuring that product quality and output remain at a high level. Secondly, it successfully reduces the economic losses caused by equipment downtime due to coupling damage. It avoids direct economic losses such as raw material waste and order delay compensation resulting from production interruptions. The diameter tolerance of the repaired coupling is within 0.01-0.02mm.

[0024] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A repair device for converter couplings in steel plants, characterized in that, The device includes a workbench (1) and two bearings (2). A first mounting plate (3) is fixedly connected to the workbench (1). A rotating cylinder (4) is movably passed through the first mounting plate (3). The outer ring of one of the bearings (2) is fixedly connected to the first mounting plate (3). The inner ring of the bearing (2) is fixedly connected to the rotating cylinder (4). The inner wall of the rotating cylinder (4) is threaded. A throttle (5) is fixedly connected to one end of the rotating cylinder (4). A lead screw (6) is threaded into the rotating cylinder (4). The other end of the lead screw (6) is fixedly connected to the inner ring of the other bearing (2). A connecting plate (7) is fixedly connected to the outer ring of the other bearing (2). Short rods (8) are hinged to both ends of the connecting plate (7). A clamping and fixing rod (9) is hinged to the other end of the short rod (8). A second mounting plate (10) is hinged to the clamping and fixing rod (9). The second mounting plate (10) is fixedly connected to the workbench (1).

2. The repair device for a converter coupling in a steel plant according to claim 1, characterized in that, The clamping and fixing rod (9) is composed of a long rod (91) and an arc plate (92). The long rod (91) and the arc plate (92) are fixedly connected. The connection between the long rod (91) and the arc plate (92) is hinged to the second mounting plate (10). The inner side of the arc plate (92) is provided with a rubber pad.

3. The repair device for a converter coupling in a steel plant according to claim 1, characterized in that, The workbench (1) is provided with an installation rod (11), the installation rod (11) is provided with a cavity, a rotating rod (12) is movably sleeved in the cavity, the other end of the rotating rod (12) is provided with a fixed seat (13), a hydraulic cylinder (14) is fixedly connected to the fixed seat (13), the telescopic end of the hydraulic cylinder (14) is provided with a pressure plate (15), a bearing (16) is fixedly connected to the rotating rod (12), the outer ring of the bearing (16) is fixedly connected to the installation rod (11), and a throttle (17) is provided on the rotating rod (12).

4. The repair device for a converter coupling in a steel plant according to claim 3, characterized in that, The mounting rod (11) and the rotating rod (12) are provided with limiting holes (18), and bolts (19) are threaded onto the limiting holes (18).

5. A method for repairing converter couplings in steel plants, characterized in that, Includes the following steps: S1: Preparation: First, the staff will remove the oil and rust from the coupling to be welded. Then, the crane coupling with a bore diameter of Ф65mm or Ф150mm will be preheated and fixed on the repair device. S2: Welding: If a Ф65mm diameter crane coupling is used to replace the damaged coupling, the inner ring of the crane coupling is welded using 507 welding rods and open welding. During the welding process, the operator measures the inner diameter of the coupling using a micrometer and an inside diameter gauge to ensure that the inner diameter of the welded coupling is Ф63mm. If a Ф150mm diameter crane coupling is used to replace the damaged coupling, the original hole of the coupling is heated and a Ф80mm insert is inserted. Then, a hole is drilled at the connection between the insert and the coupling, and a lead screw is installed for fixation. The end face of the coupling is then ground flat and preheated. Finally, the connection between the insert and the coupling is welded and fixed using open welding.

6. A method for repairing a converter coupling in a steel plant according to claim 5, characterized in that, In S1, the operating steps for removing oil and rust from the coupling are as follows: Step 1: Soaking: First, soak the coupling bushing in diesel or kerosene for 10-30 minutes to fully soften and dissolve the oil mist on the bushing; Step 2: Scrubbing and rinsing: Then use a stiff-bristled brush dipped in cleaning solution to scrub the inner and outer surfaces of the bushing, as well as the oil grooves and gaps. Next, use carburetor cleaner to spray the scrubbed bushing, and then use cleaning solution to rinse the bushing. Step 3: Drying: Then use compressed air to blow dry the cleaned bushing, ensuring that the cleaning fluid inside and outside the bushing is completely dry; Step 4: Inspection: Finally, check whether there is any residual glue or wear on the inner hole and surface of the bushing after drying.

7. A method for repairing a converter coupling in a steel plant according to claim 5, characterized in that, In S1, the preheating temperature for couplings with a bore diameter of Ф65mm is 250-300℃, and the preheating temperature for couplings with a bore diameter of Ф150mm is 300-350℃.

8. A method for repairing a converter coupling in a steel plant according to claim 5, characterized in that, In S2, the original hole of the crane coupling needs to be heated to 160°C before inserting the bushing.

9. A method for repairing a converter coupling in a steel plant according to claim 5, characterized in that, In S2, the welding current is 140A and the arc voltage is 21V.

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