Multifunctional lifting appliance for overhauling steam turbine

Abstract

The utility model belongs to the technical field of lifting appliances for steam turbine overhaul, and particularly relates to a multifunctional lifting appliance for steam turbine overhaul. Comprising a cross beam, a vibrator is installed on the upper top face of the cross beam, two fixing lifting lugs are welded to the upper top face of the cross beam, a sliding groove is formed in the bottom end of the cross beam, two strip-shaped holes communicated with the sliding groove are formed in the upper portion of the cross beam, jackscrew bolts are slidably connected into the strip-shaped holes in a penetrating mode, fixing blocks slidably connected into the sliding groove are connected to the jackscrew bolts in a threaded mode, and two adjusting lifting lugs are slidably connected into the sliding groove. Four positioning plates are welded to the bottom end of the cross beam, and a plurality of positioning holes are formed in the positioning plates. According to the utility model, hoisting of a steam turbine rotor, taking-out of a partition plate and hoisting of the partition plate can be completed, the partition plate does not need to be manually knocked when being taken out, the partition plate is prevented from being damaged by manual knocking, the operation is simple, the working efficiency is high, and the safety is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting tools for steam turbine maintenance, in particular to a multifunctional hoisting tool for steam turbine maintenance. Background Art

[0002] Steam turbines are widely used in power plants, metallurgy, large chemical industry and other enterprises. High-temperature and high-pressure steam passes through the turbine diaphragm and the blades on the rotor at high speed, driving the turbine rotor to rotate. The turbine rotor drives the generator or blower through the coupling to do work. When performing maintenance, the turbine rotor needs to be hoisted first, and then the diaphragm needs to be removed.

[0003] Since the steam turbine operates under high temperature and high pressure for a long time, the partition and the installation slot will rust together, making it difficult to remove during maintenance. At present, the common method for removing the partition is to hang a hand winch on the driving hook, screw a lifting ring into the lifting hole of the partition, connect the hand winch and the partition lifting ring through a wire rope, apply tension on the partition with the hand winch, and then the maintenance personnel stand on the steam turbine cylinder body and use a copper rod to vertically knock the edge of the partition to remove the partition through vibration and tension. This method is inefficient, complicated to operate, time-consuming and labor-intensive, and improper operation can easily cause damage to the equipment. At the same time, there are certain safety hazards for maintenance personnel during the operation. Summary of the invention

[0004] The utility model aims to provide a multifunctional hoisting device for steam turbine maintenance to solve the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a multifunctional hoist for steam turbine maintenance, comprising a cross beam, a vibrator is installed on the top surface of the cross beam and two fixed lifting ears are welded, a slide groove is provided at the bottom end of the cross beam, two strip holes connected with the slide groove are opened above the cross beam, top screw bolts are slidably passed through the strip holes, the top screw bolts are threaded with a fixed block slidably connected in the slide groove, two adjusting lifting ears are slidably connected in the slide groove, four positioning plates are welded at the bottom end of the cross beam, and a plurality of positioning holes are opened on the positioning plates.

[0006] Furthermore, the cross section of the slide is T-shaped, with one narrow side of the slide facing downward and open, and the four positioning plates are symmetrically distributed in pairs on both sides of the open end of the slide and in pairs at both ends of the beam.

[0007] Furthermore, the fixed block is square, and an internal thread hole is provided in the central position of the fixed block. The top thread bolt passes through the strip hole and is threaded into the internal thread hole of the fixed block. The tail end of the top thread bolt passes through the slide groove and exceeds the lower bottom surface of the beam. The width of the fixed block is smaller than the wide side of the slide groove and larger than the narrow side of the slide groove. The fixed block is slidably connected to one end of the wide side of the slide groove.

[0008] Furthermore, a hanging plate is welded on the top of the adjusting lifting ear, the width of the hanging plate is smaller than the wide side of the slide slot and larger than the narrow side of the slide slot, the adjusting lifting ear is slidably connected to one end of the wide side of the slide slot through the hanging plate, and the adjusting lifting ear is provided with fixing holes and hanging holes from top to bottom, and the position and diameter of the fixing hole correspond to the position and diameter of the positioning hole.

[0009] Furthermore, the adjusting lifting lugs are bolted to the positioning plates on both sides of the open end of the slide slot through bolt pairs, positioning holes and fixing holes.

[0010] Furthermore, the vibrator is installed at the center of the top surface of the beam, two fixed ears are symmetrically located on the beam on both sides of the vibrator, two strip holes are symmetrically located on the beam on both sides of the two fixed ears, and hanging holes are opened on the fixed ears.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model can complete the lifting of the turbine rotor, the removal of the partition, and the lifting of the partition. When the partition is taken out, there is no need to manually knock on the partition, which prevents the manual knocking from causing damage to the partition. The operation is simple, the work efficiency is high, and the safety is high.

[0013] 2. The vibration generated by the vibrator can continuously loosen the rusted surface of the partition and the installation slot. There is no need to manually knock on the partition, which will not cause damage to the partition and there are no safety hazards when knocking. At the same time, the high vibration frequency of the vibrator can quickly separate the partition from the installation slot, thereby improving work efficiency.

[0014] 3. Provide an external fulcrum for the partition through the jacking bolt. Continuously tightening it can give the partition an upward lifting force. The lifting force generated by rotating the jacking bolt is far greater than the effect of direct pulling. It is easy to operate, has low work intensity, high safety, and further improves work efficiency.

[0015] 4. By opening several positioning holes on the positioning plate, the adjusting lugs are fixed in the appropriate position to ensure that the center of gravity of the turbine rotor is located in the middle of the beam to prevent the rotor from tilting during lifting.

[0016] 5. The rotor and the partition are lifted by sliding the adjusting lugs connected in the slideway, which has a clever design, simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the disassembled structure of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the utility model when the trolley is hoisted.

[0020] Figure 4 It is a structural schematic diagram of the utility model when the partition is taken out.

[0021] Among them: 1. crossbeam; 2. vibrator; 3. fixed lifting eye; 4. slide groove; 5. strip hole; 6. top screw bolt; 7. fixing block; 8. adjusting lifting eye; 9. positioning plate; 10. positioning hole; 11. inner thread hole; 12. hanging plate; 13. fixing hole; 14. lifting hole; 15. bolt pair; 16. rotor; 17. partition; 18. cylinder body; 19. hook; 20. lifting buckle; 21. wire rope sleeve; 22. lifting ring; 23. cushion block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Embodiment 1:

[0024] like Figure 1-4 As shown, a multifunctional lifting device for steam turbine maintenance comprises a cross beam 1, a vibrator 2 is installed on the top surface of the cross beam 1 and two fixed lifting ears 3 are welded thereto, a slide groove 4 is arranged at the bottom end of the cross beam 1, two strip holes 5 connected with the slide groove 4 are opened on the top of the cross beam 1, a top screw bolt 6 is slidably passed through the strip hole 5, the top screw bolt 6 is threadedly connected with a fixed block 7 slidably connected in the slide groove 4, two adjusting lifting ears 8 are slidably connected in the slide groove 4, four positioning plates 9 are welded at the bottom end of the cross beam 1, and a plurality of positioning holes 10 are opened on the positioning plate 9.

[0025] The cross section of the chute 4 is T-shaped, with one narrow side end of the chute 4 facing downward and open, and four positioning plates 9 are symmetrically distributed in pairs on both sides of the open end of the chute 4 and in pairs at both ends of the beam 1.

[0026] The vibrator 2 is used to vibrate the cross beam 1, so that when the cross beam 1 hangs the partition 17, the partition 17 can be continuously vibrated to loosen the rusted surface of the partition 17 and the cylinder body 18 slot under the vibration. The slide groove 4 is used to slide and connect the fixed block 7 and the adjusting ear 8, and the positioning plate 9 is used to bolt and fix the adjusting ear 8. Since the position of the turbine rotor 16 suitable for hanging the wire rope sleeve 21 is at both ends, and it is necessary to ensure that the center of gravity of the turbine rotor 16 is located in the middle of the cross beam 1 to prevent tilting during lifting, it is necessary to open a number of positioning holes 10 to fix the adjusting ear 8 in a suitable position.

[0027] The fixing block 7 is square, and an inner thread hole 11 is provided in the central position of the fixing block 7. The top thread bolt 6 passes through the strip hole 5 and is threaded into the inner thread hole 11 of the fixing block 7. The tail end of the top thread bolt 6 passes through the slide groove 4 and exceeds the lower bottom surface of the beam 1. The width of the fixing block 7 is smaller than the wide side of the slide groove 4 and larger than the narrow side of the slide groove 4. The fixing block 7 is slidably connected to one end of the wide side of the slide groove 4.

[0028] Due to the limitation of the fixing block 7, when the top screw bolt 6 is tightened, the fixing block 7 is tightly attached to the inner wall of the cross beam 1 located at the slide groove 4. When the top screw bolt 6 is further tightened, an upward lifting force will be given to the cross beam 1, thereby pulling the partition 17 upward.

[0029] A hanging plate 12 is welded to the top of the adjusting lifting ear 8. The width of the hanging plate 12 is smaller than the wide side of the slide slot 4 and larger than the narrow side of the slide slot 4. The adjusting lifting ear 8 is slidably connected to one end of the wide side of the slide slot 4 through the hanging plate 12. The adjusting lifting ear 8 is provided with a fixing hole 13 and a hanging hole 14 from top to bottom. The position and diameter of the fixing hole 13 correspond to the position and diameter of the positioning hole 10.

[0030] The adjusting lifting lug 8 is bolted to the positioning plates 9 on both sides of the open end of the slide slot 4 through a bolt pair 15 , a positioning hole 10 , and a fixing hole 13 .

[0031] The vibrator 2 is installed at the center of the top surface of the beam 1, two fixed ears 3 are symmetrically located on the beam 1 on both sides of the vibrator 2, two strip holes 5 are symmetrically located on the beam 1 on both sides of the two fixed ears 3, and a hanging hole 14 is opened on the fixed ears 3.

[0032] Embodiment 2:

[0033] When the utility model is working, it is operated by the following steps:

[0034] (1) Lifting the steam turbine rotor 16: Before lifting, the lifting eye 14 of the fixed lifting lug 3 and the hook 19 of the lifting equipment are hung through the lifting buckle 20 and the wire rope loop 21, and the crossbeam 1 is lifted to the top of the steam turbine rotor 16. The two adjusting lifting lugs 8 are respectively slid to the two ends of the crossbeam 1, and the bolt pair 15 is selected to pass through the positioning hole 10 and the fixing hole 13 to bolt the adjusting lifting lug 8. The lifting eye 14 of the adjusting lifting lug 8 and the two ends of the steam turbine rotor 16 are hung through the lifting buckle 20 and the wire rope loop 21, and the steam turbine rotor 16 is lifted by the lifting equipment, lifted and placed on a special bracket, and the wire rope loop 21 hung on the steam turbine rotor 16 is removed;

[0035] (2) Removing the partition 17: Lift the crossbeam 1 to the top of the turbine partition 17 and rotate the crossbeam 1 so that it is parallel to the partition 17. Thread the lifting ring 22 into the lifting hole of the partition 17. Remove the bolt pair 15 that fixes the adjusting lifting ear 8. Slide the two adjusting lifting ears 8 to the top of the corresponding lifting ring 22. Hang the lifting ring 22 and the lifting hole 14 of the adjusting lifting ear 8 through the lifting buckle 20 and the wire rope sleeve 21. Pass the top screw bolt 6 through the corresponding strip hole 5 and thread it to the fixing block 7. Adjust the position of the top screw bolt 6 so that it can be pressed against the cylinder body 18 on both sides of the partition 17. Place the cushion block 23 at the corresponding position of the cylinder body 18 to prevent the top screw bolt 6 from damaging the cylinder body 18 when tightening it. It can also play a role of padding, and there is no need to use a longer top screw bolt 6. Tighten the top screw bolt 6 to tighten the wire rope sleeve 21 connecting the lifting ring 22 and the adjusting lifting ear 8, turn on the vibrator 2, and the vibration generated by the vibrator 2 can continuously loosen the rusted surface of the partition 17 and the installation slot, and continue to tighten the top screw bolt 6 until the partition 17 is removed from the installation slot of the cylinder body 18, lift the removed partition 17 and place it in another position, and remove the wire rope sleeve 21 and the lifting ring 22 connected with the partition 17;

[0036] (3) Continue to remove other partitions 17 according to step (2);

[0037] (4) After the inspection and maintenance is completed, the partition 17 is hung on the adjusting lifting ear 8 through the lifting buckle 20, the wire rope loop 21 and the lifting ring 22, and is lifted back to the original position for installation. After all the partitions 17 are installed, the top screw bolt 6 and the fixing block 7 are removed, and the adjusting lifting ear 8 is bolted to the positioning plate 9 through the bolt pair 15, and the rotor 16 is hung on the adjusting lifting ear 8 through the lifting buckle 20 and the wire rope loop 21, and the rotor 16 is lifted back to the original position for installation by the lifting equipment.

[0038] The working principle of the utility model is:

[0039] Since the steam turbine rotor 16 is suitable for hanging the wire rope loop 21 at both ends, and it is necessary to ensure that the center of gravity of the steam turbine rotor 16 is located in the middle of the beam 1 to prevent tilting during lifting, it is necessary to open a number of positioning holes 10 to fix the adjustment ear 8 in a suitable position. The vibrator 2 is used to vibrate the beam 1, so that when the beam 1 hangs the partition 17, the partition 17 can be continuously vibrated to loosen the rusted surface of the partition 17 and the cylinder body 18 slot under vibration. The slide 4 is used to slide the fixed block 7 and the adjustment ear 8, and the positioning plate 9 is used to bolt and fix the adjustment ear 8. Due to the limitation of the fixing block 7, when tightening the top screw bolt 6, the fixing block 7 is tightly attached to the inner wall of the cross beam 1 located at the slide groove 4, and the top screw bolt 6 provides an external fulcrum for the partition 17. Continuously tightening can give the cross beam 1 an upward lifting force, thereby pulling the partition 17 upward. The lifting force effect generated by rotating the top screw bolt 6 is much greater than the effect of direct pulling up. It is easy to operate, has low work intensity, high safety, and improves work efficiency. Under the dual effects of the top screw bolt 6 continuously lifting the partition 17 and the vibrator 2 continuously vibrating the partition 17, the rusted surface of the partition 17 and the cylinder body 18 slot gradually loosens and lifts, thereby removing the partition 17. Since the diameters of the partitions 17 are different, each time the partition 17 is taken out, it is necessary to adjust the position of the adjustment ear 8 so that it can pull the partition 17 vertically.

[0040] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0041] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A multifunctional hoist for steam turbine maintenance, characterized in that: It includes a crossbeam, on the top surface of which a vibrator is installed and two fixed ears are welded, a slide groove is provided at the bottom end of the crossbeam, two strip holes connected to the slide groove are opened on the top of the crossbeam, top screw bolts are slidably passed through the strip holes, the top screw bolts are threaded with a fixed block slidably connected in the slide groove, there are two adjustment ears slidably connected in the slide groove, four positioning plates are welded at the bottom end of the crossbeam, and a number of positioning holes are opened on the positioning plates.

2. The multifunctional lifting device for steam turbine maintenance according to claim 1, characterized in that: The cross section of the slide is T-shaped, one end of the narrow side of the slide is downward and open, and the four positioning plates are symmetrically distributed in pairs on both sides of the open end of the slide and in pairs at both ends of the beam.

3. The multifunctional lifting device for steam turbine maintenance according to claim 2, characterized in that: The fixing block is square and has an inner thread hole in the center of the fixing block. The top thread bolt passes through the strip hole and is threaded into the inner thread hole of the fixing block. The tail end of the top thread bolt passes through the slide groove and exceeds the lower bottom surface of the cross beam. The width of the fixing block is smaller than the wide side of the slide groove and larger than the narrow side of the slide groove. The fixing block is slidably connected to one end of the wide side of the slide groove.

4. The multifunctional lifting device for steam turbine maintenance according to claim 3, characterized in that: A hanging plate is welded on the top of the adjusting lifting ear, the width of the hanging plate is smaller than the wide side of the slide slot and larger than the narrow side of the slide slot, the adjusting lifting ear is slidably connected to one end of the wide side of the slide slot through the hanging plate, and the adjusting lifting ear is provided with fixing holes and hanging holes from top to bottom, and the position and diameter of the fixing hole correspond to the position and diameter of the positioning hole.

5. The multifunctional lifting device for steam turbine maintenance according to claim 4, characterized in that: The adjusting lifting lugs are bolted to the positioning plates at both sides of the open ends of the slide slots through bolt pairs, positioning holes and fixing holes.

6. The multifunctional lifting device for steam turbine maintenance according to claim 1, characterized in that: The vibrator is installed at the center of the top surface of the beam, two fixed hanging ears are symmetrically located on the beam on both sides of the vibrator, two strip holes are symmetrically located on the beam on both sides of the two fixed hanging ears, and hanging holes are opened on the fixed hanging ears.

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