A hoisting device for a water turbine generator air cooler

Abstract

The utility model provides a water -turbine generator air cooler hoist device, including water -turbine generator stator and factory building lifting hook, the outside of water -turbine generator stator is provided with outgoing line and air cooler, and the air cooler is located outgoing line below, and the hoist device for lifting out air cooler is hung on factory building lifting hook, and the hoist device includes two cross beams of up and down arrangement, and outgoing line is located between two cross beams, and the cross beam in the upper place is connected with factory building lifting hook through first wire rope. Through setting up and down arrangement's double cross beam structure, stator outgoing line is accommodated in the clearance between two cross beams, effectively avoids the space interference of electrical outgoing line, solves the technical problem that air cooler arranged under outgoing line cannot be directly vertically hoisted, utilizes the design of the counter pull assembly and multiple counter pull lugs set between cross beams simultaneously, can drive air cooler and move along stator circumferential step by step, avoids outgoing line area gradually, realizes safe positioning and dismounting.

Description

Technical Field

[0001] This utility model relates to the field of air cooler disassembly and assembly, and in particular to a lifting device for a hydro generator air cooler. Background Technology

[0002] The air cooler of a hydro-generator is typically located on the outer circumference of the stator and is used to cool the generator. During equipment installation and maintenance, the air cooler needs to be disassembled or hoisted from the generator pit. Under normal circumstances, the air cooler can be vertically lifted out of the pit by a plant crane using two lifting points located on its top.

[0003] However, when the air cooler is located directly below the stator main leads or neutral point leads, structural obstacles such as overhead electrical leads prevent direct vertical lifting, making disassembly and assembly difficult. To avoid these obstacles, the air cooler must first be moved horizontally a certain distance along the stator circumference before vertical lifting can be performed.

[0004] The currently common method for dismantling and assembling air coolers involves laying a rollable steel pipe beneath the air cooler, slightly lifting it and placing it on the pipe to form a temporary rolling support. Then, the air cooler is manually pushed circumferentially to avoid the lead-out line area, and finally, a plant crane hook is used to vertically lift it out of the pit. This method has significant drawbacks: firstly, it requires multiple operators, resulting in high manpower demands; secondly, the air cooler's stability is poor during movement, making it prone to tilting or falling, posing a significant safety risk. This is especially true for larger and heavier air coolers, where the operational difficulty and danger increase significantly. Therefore, a lifting device for hydro-generator air coolers is proposed to address these issues. Utility Model Content

[0005] The main purpose of this utility model is to provide a lifting device for the air cooler of a hydro generator, which solves the problems of low efficiency and poor safety of the existing air cooler disassembly and assembly methods under space-constrained working conditions.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a lifting device for a hydro-generator air cooler, including a hydro-generator stator and a plant hook. A lead wire and an air cooler are arranged on the outer side of the hydro-generator stator. The air cooler is located below the lead wire. A lifting device for lifting the air cooler is mounted on the plant hook. The lifting device includes two horizontal beams arranged vertically. The lead wire is located between the two horizontal beams. The upper horizontal beam is connected to the plant hook via a first steel wire rope, and the lower horizontal beam is connected to the air cooler via a second steel wire rope. The two horizontal beams are connected by a first set of tie rods. A row of tie rod lugs is symmetrically arranged on opposite sides of the horizontal beams. The distance between adjacent tie rod lugs is smaller than the distance between adjacent lead wires. The first set of tie rods sequentially switches between two opposite tie rod lugs from the outside to the inside, allowing the air cooler to move circumferentially step by step to avoid the lead wire.

[0007] In the preferred embodiment, a second set of tie rods is provided between the two crossbeams. The number of the first set of tie rods and the second set of tie rods are both two, and the first set of tie rods and the second set of tie rods alternately connect the two crossbeams from the outside to the inside.

[0008] In the preferred embodiment, both the first and second sets of pull-out assemblies include a hand chain hoist. The lifting ring at the top of the hand chain hoist is suspended on the pull-out lug of the upper crossbeam. The hook at the bottom of the hand chain hoist is connected to a third wire rope, and the other end of the third wire rope is connected to the pull-out lug of the lower crossbeam.

[0009] In the preferred embodiment, connecting lugs are provided on the opposite sides of the two crossbeams, which are used to hook the first wire rope and the second wire rope, respectively.

[0010] In the preferred embodiment, the crossbeam is an I-beam in a tilted position.

[0011] In the preferred embodiment, slide rails are symmetrically arranged on the inner walls of the two grooves on the upper and lower sides of the crossbeam, and a row of fixing holes penetrating the slide rails is provided on the two side walls of the grooves, with the fixing holes being evenly distributed.

[0012] In the preferred embodiment, both the connecting lug and the counter-lever lug are slidably mounted in corresponding grooves via bases at their ends. The base includes a seat body, with sliding grooves on both sides that slide with the slide rail. A pin hole is provided through the seat body, and a screw can be inserted between any two opposite fixing holes. A nut is threaded onto the protruding end of the screw.

[0013] In the preferred embodiment, two connecting lugs are provided on each of the two crossbeams.

[0014] In the preferred embodiment, the top of the air cooler is provided with lifting lugs for hooking with the second wire rope.

[0015] In the preferred embodiment, the spacing between adjacent tie lugs is half that between adjacent lead wires.

[0016] This utility model provides a lifting device for a hydro-generator air cooler. By setting up a double crossbeam structure arranged vertically, the stator lead wires are accommodated in the gap between the two crossbeams, effectively avoiding spatial interference from the electrical lead wires. This solves the technical problem that the air cooler located below the lead wires cannot be directly and vertically lifted. At the same time, by utilizing the anti-pull assembly and multiple anti-pull lugs set between the crossbeams, the air cooler can be moved step by step along the stator circumference, gradually avoiding the lead wire area, and achieving safe positioning and disassembly / reassembly. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a diagram showing the positional relationship between the stator, air cooler, and lead wires of the hydro-generator of this utility model; Figure 2 This is a utility model Figure 1 Side view of the structure; Figure 3 This is a structural diagram of the lifting device of this utility model; Figure 4 This is a structural diagram of the crossbeam, connecting lugs, and tie lugs of this utility model. Figure 5 This is a structural diagram of the crossbeam of this utility model; Figure 6 This is a structural diagram of the base of this utility model; Figure 7 This is a connection structure diagram of the first and second sets of pull-out components of this utility model; Figure 8 This is a schematic diagram of the hoisting steps in the first part of this utility model; Figure 9 This is a schematic diagram of the hoisting steps in the second part of this utility model; Figure 10 This is a schematic diagram of the hoisting steps in the third part of this utility model; Figure 11 This is a schematic diagram of the hoisting steps in the fourth part of this utility model.

[0018] In the diagram: 1. Generator pit; 2. Hydro-generator stator; 3. Air cooler; 4. Lifting device; 40. Crossbeam; 401. Slide rail; 402. Fixing hole; 42. First set of tie rod assembly; 420. Hand chain hoist; 421. Third wire rope; 43. Tie rod lug; 430. Base; 431. Slide groove; 432. Pin hole; 44. Connecting lug; 45. Second wire rope; 46. First wire rope; 47. Second set of tie rod assembly; 5. Lead-out line; 6. Plant hook. Detailed Implementation

[0019] like Figure 1-11 As shown, a lifting device for an air cooler of a hydro-generator includes a hydro-generator stator 2 and a powerhouse hook 6. The hydro-generator stator 2 is specifically installed in the generator foundation pit 1, and the powerhouse hook 6 is installed in the generator powerhouse. Its main structure is a gantry crane on the upper powerhouse structure. The powerhouse hook 6 is connected to the wire rope of the gantry crane winch. Lead-out lines 5 and an air cooler 3 are provided on the outside of the hydro-generator stator 2. The air cooler 3 is located below the lead-out lines 5. If the lead-out lines are main or neutral point lead-out lines, the air cooler 3 cannot be lifted vertically directly. In this embodiment, there are three bundles of lead-out lines 5. A lifting device 4 for lifting the air cooler 3 is installed on the powerhouse hook 6. This is prior art in the field and therefore will not be described in detail here.

[0020] The lifting device 4 includes two horizontal beams 40 arranged vertically, with the lead wire 5 located between the two horizontal beams 40 to avoid interference with the lifting process. The upper horizontal beam 40 is connected to the factory hook 6 via a first steel wire rope 46 to achieve suspension support for the entire device. The lower horizontal beam 40 is connected to the air cooler 3 via a second steel wire rope 45 to transmit the lifting force to the air cooler.

[0021] Specifically: The two crossbeams 40 are each provided with connecting lugs 44 on their opposite sides, which are used to hook the first wire rope 46 and the second wire rope 45 respectively. In addition, the top of the air cooler 3 is provided with lifting lugs for hooking with the second wire rope 45.

[0022] Two crossbeams 40 are connected by a first set of tie rods 42. There are two tie rods 42. A row of tie rod lugs 43 is symmetrically arranged on opposite sides of the crossbeams 40. The number of tie rod lugs 43 can be adjusted according to the actual situation. In this embodiment, there are eight tie rod lugs 43 in a row, and the eight tie rod lugs 43 are equidistantly distributed. The distance between adjacent tie rod lugs 43 is less than the distance between adjacent lead-out lines 5. Preferably, the distance between adjacent tie rod lugs 43 is half that of adjacent lead-out lines 5, so as to ensure that in each step of movement, there is always a tie rod lug position that can avoid the lead-out line 5 obstacle, thereby ensuring continuous and adjustable movement capability. The first set of tie rods 42 sequentially switches between two opposite tie rod lugs 43 from the outside to the inside, so as to make the air cooler 3 move in steps along the circumference to avoid the lead-out line 5.

[0023] With this design, the first set of tie rods 42 can be connected between the two outermost tie rod lugs 43 on the left and right sides of the two crossbeams 40. Then, the air cooler 3 can be lifted by the factory hook 6 and the lifting device 4 and moved a certain distance in the circumferential direction. After that, the air cooler 3 is lowered. Then, the two sets of tie rods 42 are moved inward by one lifting point position. At this time, the lifting point position avoids the first bundle of lead wires 5. The above operation is repeated until the air cooler 3 is moved out of the position of the lead wires 5, thereby realizing the step-by-step circumferential movement and finally reaching a safe position where it can be lifted vertically. Then, it can be lifted out directly by the factory hook 6.

[0024] In the preferred embodiment, to further improve the stability and synchronization during the movement, a second set of tie rods 47 is provided between the two crossbeams 40. The number of the first set of tie rods 42 and the second set of tie rods 47 are both two, and the first set of tie rods 42 and the second set of tie rods 47 alternately connect the two crossbeams 40 from the outside to the inside.

[0025] In addition, both the first set of pull-out components 42 and the second set of pull-out components 47 include a hand chain hoist 420. The lifting ring at the top of the hand chain hoist 420 is suspended on the pull-out lug 43 of the upper crossbeam 40. The hook at the bottom of the hand chain hoist 420 is connected to a third steel wire rope 421. The other end of the third steel wire rope 421 is connected to the pull-out lug 43 of the lower crossbeam 40. With this design, the slack and pull of each third steel wire rope 421 can be controlled by the hand chain hoist 420. At the same time, the lower crossbeam 40 and the air cooler 3 can be raised and lowered without the need for the factory hook 6 to be raised and lowered.

[0026] With this design, the first set of counter-pull components 42 and the second set of counter-pull components 47 are arranged alternately and connected to the counter-pull lugs 43 at different positions to form an alternating pulling mode in the air. During operation, the two sets of counter-pull components can be efficiently and alternately extended and retracted to achieve a more stable and anti-skew circumferential propulsion action.

[0027] In use, first connect the first set of tie rod assemblies 42 to the two outermost pairs of tie rod lugs 43 in the initial position, and tighten the hand chain hoist 420. Pull the lower crossbeam 40 to drive the air cooler 3, and then move it one step along the circumference via the factory hook 6. After completing this step, keep the first set of tie rod assemblies 42 in a taut state, making it a stable anchor point to maintain the position of the lower crossbeam 40 and prevent it from retraction or displacement due to gravity or disturbance. Then connect the second set of tie rod assemblies 47 to the two innermost pairs of tie rod lugs 43. At this time, the position of this lifting point avoids the first bundle of lead wires 5. Tighten the hand chain hoist 420 to make it bear the tension and establish effective constraint. After the second set of tie rods 47 is fully stressed and stable, loosen the connection between the first set of tie rods 42 and the current lifting lug. Then, continue to move one step along the circumference through the factory hook 6. Repeat the above process: alternately install the first set of tie rods 42 and the second set of tie rods 47 on a row of tie rod lifting lugs 43. Through the operation mode of pulling and anchoring, and alternating forward movement, the air cooler 3 can be smoothly and continuously advanced step by step along the circumference until it is completely separated from the area directly below all the lead-out lines 5 and enters the unobstructed vertical lifting range.

[0028] It should be noted that the ends of the wire ropes in this embodiment are all connected to hooks for quick hooking.

[0029] In the preferred embodiment, to further enhance the adjustment flexibility and adaptability, the crossbeam 40 is an I-beam in a tilted state, that is, the web of the I-beam is set horizontally, and two grooves with openings facing upward or downward are formed between the left and right flanges. Slide rails 401 are symmetrically arranged on the relative inner walls of the upper and lower grooves, and a row of fixing holes 402 penetrating the slide rails 401 is provided on the two side walls of the grooves. The fixing holes 402 are evenly distributed, and the number and spacing of the fixing holes 402 are set as needed.

[0030] The connecting lug 44 and the counter-lever lug 43 are slidably mounted in corresponding grooves via bases at their ends. The base includes a seat body 430, and the two sides of the seat body 430 are provided with slide grooves 431 that slide with the slide rail 401, allowing the base to slide freely in the length direction of the beam, thereby adjusting the specific positions of the connecting lug 44 and the counter-lever lug 43. A pin hole 432 is provided through the seat body 430, and a screw can be inserted between any two opposite fixing holes 402. The protruding end of the screw is threaded with a nut.

[0031] This design allows the base to be moved to the desired position according to the required spacing. The screw is inserted through the pin hole 432 and the corresponding set of fixing holes 402, and a nut is installed at the protruding end to lock the position, thereby fixing the position. This allows the position of each lifting lug to be flexibly adjusted according to the actual lead wire layout, enhancing the versatility of the device.

[0032] In the preferred embodiment, two connecting lugs 44 are respectively provided on the two crossbeams 40. The two connecting lugs 44, in conjunction with the movement of the base, can be adjusted according to the lifting needs to improve the stability during the lifting process and prevent tilting.

[0033] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A lifting device for an air cooler of a hydro-generator, comprising a hydro-generator stator (2) and a plant hook (6), wherein an outgoing line (5) and an air cooler (3) are provided on the outer side of the hydro-generator stator (2), the air cooler (3) being located below the outgoing line (5), and a lifting device (4) for lifting out the air cooler (3) is mounted on the plant hook (6), characterized in that: The lifting device (4) includes two horizontal beams (40) arranged vertically. The lead wire (5) is located between the two horizontal beams (40). The upper horizontal beam (40) is connected to the factory hook (6) through the first wire rope (46), and the lower horizontal beam (40) is connected to the air cooler (3) through the second wire rope (45). The two horizontal beams (40) are connected by a first set of tie rods (42). A row of tie rods (43) is symmetrically arranged on opposite sides of the horizontal beams (40). The distance between adjacent tie rods (43) is smaller than the distance between adjacent lead wires (5). The first set of tie rods (42) sequentially switches between the two opposite tie rods (43) from the outside to the inside, so that the air cooler (3) can move in steps along the circumference to avoid the lead wire (5).

2. The lifting device for the air cooler of a hydro-generator according to claim 1, characterized in that: A second set of tie rods (47) is provided between the two crossbeams (40). There are two sets of tie rods (42) and two sets of tie rods (47). The first set of tie rods (42) and the second set of tie rods (47) are alternately connected to the two crossbeams (40) from the outside to the inside.

3. The lifting device for the air cooler of a hydro-generator according to claim 2, characterized in that: Both the first set of pull-out assemblies (42) and the second set of pull-out assemblies (47) include a hand chain hoist (420). The lifting ring at the top of the hand chain hoist (420) is suspended on the pull-out lug (43) of the upper beam (40). The hook at the bottom of the hand chain hoist (420) is connected to a third wire rope (421). The other end of the third wire rope (421) is connected to the pull-out lug (43) of the lower beam (40).

4. The lifting device for the air cooler of a hydro-generator according to claim 1, characterized in that: Both crossbeams (40) are provided with connecting lugs (44) on their opposite sides, which are used to hook the first wire rope (46) and the second wire rope (45) respectively.

5. The lifting device for the air cooler of a hydro-generator according to claim 4, characterized in that: The crossbeam (40) is an I-beam in a tilted state.

6. The lifting device for the air cooler of a hydro-generator according to claim 5, characterized in that: The upper and lower grooves of the crossbeam (40) are symmetrically provided with slide rails (401) on their respective inner walls, and a row of fixing holes (402) through the slide rails (401) are provided on both side walls of the grooves. The fixing holes (402) are evenly distributed.

7. The lifting device for the air cooler of a hydro-generator according to claim 6, characterized in that: The connecting lug (44) and the pull lug (43) are slidably set in the corresponding grooves through the base set at the end. The base includes a seat body (430). The two sides of the seat body (430) are provided with sliding grooves (431) that slide with the slide rail (401). A pin hole (432) is provided through the seat body (430). The pin hole (432) can be connected to a screw between any two opposite fixing holes (402), and a nut is threaded on the protruding end of the screw.

8. The lifting device for the air cooler of a hydro-generator according to claim 7, characterized in that: Two connecting lugs (44) are provided on each of the two crossbeams (40).

9. The lifting device for the air cooler of a hydro-generator according to claim 8, characterized in that: The top of the air cooler (3) is provided with a lifting lug for hooking with the second wire rope (45).

10. The lifting device for the air cooler of a hydro-generator according to claim 1, characterized in that: The spacing between adjacent tie lugs (43) is half that between adjacent lead wires (5).

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