A kind of installation lifting appliance of tubular turbine

Abstract

The application relates to a through-flow type water turbine installation lifting appliance and belongs to the technical field of hoisting equipment. The through-flow type water turbine installation lifting appliance comprises a shell and a driving assembly. The shell is used for cooperation with a crane, the shell comprises a columnar containing cavity used for containing a main shaft, the containing cavity comprises a first end and a second end, the inner wall of the first end is provided with a supporting ring, the main shaft is arranged through the supporting ring, the second end is provided with a sliding ring, the sliding ring is in sliding cooperation with the inner wall of the containing cavity, the main shaft is arranged through the sliding ring, and the sliding ring is provided with a guide hole. The driving assembly is arranged at the second end and is used for driving the main shaft to move towards the first end. Through the device, the main shaft can be driven to move, the main shaft is fixed during movement of the lifting appliance, and the safety during installation of the main shaft is improved.

Description

Technical Field

[0001] This invention belongs to the field of lifting equipment technology, specifically relating to a hoisting tool for installing a axial-flow water turbine. Background Technology

[0002] In the development of low-head, high-flow river hydropower resources and tidal energy, the axial-flow turbine has become the mainstream model due to its advantages such as axially continuous flow channel, horizontal integral layout, low hydraulic loss, and low civil engineering investment. This type of unit has a horizontal axially continuous structure and is mainly composed of core components such as bulb head, tubular seat, runner chamber, and tailrace pipe. The installation process mostly adopts the use of cranes to lift and position the components one by one.

[0003] The current conventional installation process for the main shaft of a cross-flow turbine involves first positioning and fixing the tubular base, then hoisting the main shaft to the end of the tubular base. After adjusting its posture to ensure the main shaft axis is parallel to the tubular base axis, it is axially pushed into the tubular base to complete the assembly. Existing lifting devices can only clamp and fix the main shaft; they lack the ability to actively drive its displacement. Pushing the main shaft in requires first unlocking the lifting device and then using auxiliary tooling to move the main shaft. However, unlocking the lifting device significantly increases the risk of the main shaft falling, colliding, and misaligning, seriously affecting installation safety.

[0004] If a clamp is used to hold the spindle and apply external force to drive the feed, it must mate with the spindle shoulder. Otherwise, on the smooth surface of the spindle, relative slippage can easily occur between the clamp and the spindle, making it difficult to stably control the feed accuracy and limiting the clamp's usage. If a hydraulic cylinder is used to directly move the spindle relative to the lifting device, when most of the spindle is suspended on one side of the lifting device, it is easy for it to tilt to one side, causing the spindle axis to deviate from the tubular seat axis. This makes it impossible to accurately align the mounting holes, significantly reducing assembly efficiency and installation accuracy.

[0005] In summary, how to safely move the main shaft of a axial-flow turbine after it has been hoisted into place is a technical problem that needs to be solved. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a hoisting tool for installing a axial-flow turbine.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: This application provides an installation hoist for a axial-flow turbine, including a housing and a drive assembly. The housing is used to cooperate with a crane and includes a cylindrical receiving cavity for accommodating a main shaft. The receiving cavity includes a first end and a second end. A support ring is provided on the inner wall of the first end, through which the main shaft passes. A sliding ring is provided on the second end, slidingly engaging with the inner wall of the receiving cavity, through which the main shaft passes. The sliding ring has a guide hole and is configured to include a first state and a second state. In the first state, the sliding ring can only rotate relative to the receiving cavity; in the second state, the sliding ring can only move axially along the cylindrical receiving cavity.

[0008] The drive assembly includes a movable part, a rotating part, a pushing component, and multiple flexible bodies. The movable part is movably connected to the housing along the axial direction of the receiving cavity. The rotating part is rotatably connected to the movable part. One end of each flexible body is connected to a support ring, and the other end is connected to the rotating part. Multiple flexible bodies are circumferentially spaced around the rotating part. Multiple guide holes are provided corresponding to the flexible bodies, and the flexible bodies pass through the guide holes. The pushing component is movably connected to the movable part along the axial direction of the receiving cavity.

[0009] In some embodiments, the housing is provided with a through groove, the length direction of which extends along the axial direction of the receiving cavity. A guide portion is slidably connected to the through groove. The housing is provided with a limiting portion. The guide portion is located on the side of the housing near the first end. A sliding ring is located between the limiting portion and the guide portion. Along the axial direction of the through groove, the guide portion is movably provided with a protrusion. The portion of the sliding ring facing the through groove is provided with an insertion recess.

[0010] In some embodiments, the through-slot includes an expansion section.

[0011] In some embodiments, the pushing member includes a body and a stop portion, the body being movably connected to the movable portion along the axial direction of the receiving cavity, the stop portion being used to abut against the main shaft, and an elastic element being provided between the body and the stop portion.

[0012] In some embodiments, the movable part includes a first disc and a second disc spaced apart, a rotating part is disposed between the first disc and the second disc, the rotating part is hollow and annular, and a pushing member passes through the rotating part.

[0013] In some embodiments, the peripheral wall of the rotating part is provided with teeth, and the movable part is rotatably provided with gears, the gears and teeth meshing.

[0014] In some embodiments, the flexible body is provided with a connecting portion, and the rotating portion is provided with a plurality of adjusting blocks corresponding to the flexible body. The adjusting blocks are provided with adjusting grooves, and the connecting portion and the adjusting grooves are movably engaged. The adjusting grooves include a first groove and a plurality of second grooves. The first groove extends radially along the rotation circumference of the rotating portion, and the second grooves are spaced apart along the length direction of the first groove. The connecting portion is selectively accommodated in one of the second grooves.

[0015] In some embodiments, the flexible body includes ultra-high molecular weight polyethylene rope, or aramid rope, or nylon / polyester composite rope.

[0016] In some embodiments, a guide hole is disposed on the edge of the sliding ring, and the guide hole is a notched hole.

[0017] In some embodiments, the support ring is positionably connected to the housing along the axial direction of the receiving cavity.

[0018] The present invention has the following beneficial effects: 1. The drive assembly can be used to drive the spindle to move relative to the housing during spindle installation, and can also be used to fix the spindle when the lifting device moves, thus improving the safety of spindle installation.

[0019] 2. The structure is very simple, the manufacturing cost is lower, and the installation cost is reduced.

[0020] 3. The flexible and deformable structure can reduce the risk of scratches and wear on the peripheral wall of the spindle during the drive spindle movement.

[0021] 4. The device occupies little space and is suitable for use in narrow spaces.

[0022] 5. The distance that the drive assembly can move the spindle can be flexibly adjusted, and is much greater than the travel distance of a traditional hydraulic cylinder.

[0023] 6. Multiple flexible bodies also apply a force towards the spindle's axis, supporting the side of the spindle closer to the second end. This prevents one side from being too high and the other too low, even when most of the spindle extends out of the housing from the first end, thus improving the safety and accuracy of driving the spindle. Furthermore, it reduces wear on the spindle as it moves relative to the housing.

[0024] 7. The distance the drive spindle moves can be precisely controlled.

[0025] 8. The rotating part is located at the second end of the receiving cavity, so that the rotating part will not obstruct the installation and alignment of the spindle.

[0026] 9. It can be used with spindles of different sizes.

[0027] 10. It can reduce the risk of deformation of the spindle surface caused by excessive force applied to the spindle. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the installation hoisting device for the axial-flow turbine of the present invention; Figure 2 for Figure 1 Enlarged view of point A; Figure 3 A schematic diagram of the installation hoist for the axial-flow turbine of the present invention (showing the lead screw); Figure 4 for Figure 3 Enlarged view of point B; Figure 5 This is a structural schematic diagram of the shell of the present invention cut in half (showing the arrangement of the flexible bodies); Figure 6 This is a schematic diagram of the structure of the housing of the present invention, cut open at the middle section (showing the structure of the sliding ring); Figure 7 This is a schematic diagram of the structure of the guide portion (showing the protrusion) of the present invention.

[0029] Reference numerals: 1-Housing, 12-Through groove, 121-Expansion section, 13-Through hole, 14-First end, 15-Second end, 16-Receiving cavity, 2-Main shaft, 3-Guide part, 31-Force application part, 32-Locking bolt, 33-Protrusion, 4-Support ring, 41-Fixing bolt, 5-Sliding ring, 51-Guide hole, 52-Insertion recess, 6-Drive assembly, 61-Moving part, 611-First disc, 612-Second disc, 62-Rotating part, 621-Gear, 622-Adjusting block, 6221-Second groove, 6222-First groove, 63-Pushing component, 631-Abutting part, 632-Main body, 64-Flexible body, 641-Connecting part, 6411-Limiting disc, 6412-Rod, 65-Gear, 66-Motor, 67-Hydraulic cylinder, 68-Lead screw. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0031] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0032] See Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6This application provides an installation hoist for a axial-flow turbine, including a housing 1 and a drive assembly 6. The housing 1 is used to cooperate with a crane and includes a cylindrical receiving cavity 16 for accommodating a main shaft 2. The receiving cavity 16 includes a first end 14 and a second end 15. A support ring 4 is provided on the inner wall of the first end 14, through which the main shaft 2 passes. A sliding ring 5 is provided on the second end 15, which slides in cooperation with the inner wall of the receiving cavity 16. The main shaft 2 passes through the sliding ring 5. The sliding ring 5 is provided with a guide hole 51. The sliding ring 5 is configured to include a first state and a second state. In the first state, the sliding ring 5 can only rotate relative to the receiving cavity 16. In the second state, the sliding ring 5 can only move along the axial direction of the cylindrical receiving cavity 16.

[0033] The drive assembly 6 includes a movable part 61, a rotating part 62, a pushing component 63, and a plurality of flexible bodies 64. The movable part 61 is movably connected to the housing 1 along the axial direction of the receiving cavity 16. The rotating part 62 is rotatably connected to the movable part 61. One end of the flexible body 64 is connected to the support ring 4, and the other end is connected to the rotating part 62. The plurality of flexible bodies 64 are arranged circumferentially around the rotating part 62. A plurality of guide holes 51 are provided corresponding to the flexible bodies 64. The flexible bodies 64 pass through the guide holes 51. The pushing component 63 is movably connected to the movable part 61 along the axial direction of the receiving cavity 16.

[0034] The housing 1 is used to house the main shaft 2 of the axial-flow turbine. The housing 1 may be equipped with multiple suspension rings, allowing a crane to be connected to the housing 1.

[0035] It should be noted that since the main shaft 2 can move relative to the housing 1, the center of gravity of the spreader will change after the main shaft 2 moves. Adjusting the suspension structure of the crane according to the change in the center of gravity of the spreader to keep the spreader stable is a function inherent in existing cranes. How to adjust it is known to those skilled in the art and will not be described here.

[0036] The cylindrical receiving cavity 16 of the housing 1 can be adapted to the shape of the spindle 2.

[0037] The first end 14 of the receiving cavity 16 is in an open state, allowing the main shaft 2 to be inserted into the cylindrical receiving cavity 16 from the first end 14.

[0038] The support ring 4 and the sliding ring 5 work together to support the main shaft 2 on the one hand, and to create a gap between the main shaft 2 and the cylindrical receiving cavity 16 on the other hand, which can be used to accommodate the flexible body 64.

[0039] For example, the housing 1 may be provided with a groove so that the movable part 61 can be movably connected to the housing 1.

[0040] The driving component that drives the movable part 61 to move can be selected from existing technologies. For example, the housing 1 can be rotatably provided with a lead screw 68, which is threadedly connected to the movable part 61. To improve the movement stability of the movable part 61, the housing 1 can also provide a guide rod on the opposite side of the lead screw 68 (not shown in the figure), which engages with a guide hole in the movable part 61.

[0041] The rotating part 62 is used to drive one end of the flexible body 64 near one end to rotate around the axis of the main shaft 2.

[0042] The sliding ring 5 slides against the inner wall of the receiving cavity 16, allowing the sliding ring 5 to rotate relative to the axis of the receiving cavity 16 or move along the axis of the receiving cavity 16.

[0043] During initial setup, the length of the flexible body 64 and the position of the movable part 61 can be set according to the length of the main shaft 2.

[0044] In the first state of the sliding ring 5, the lifting device can be in a moving and transporting state. The drive assembly 6 fixes the main shaft 2. At this time, the pushing component 63 is positioned near the first end 14. The pushing component 63 is used to limit the main shaft 2 when it is inserted into the receiving cavity 16 from the first end 14, and also to limit the flexible body 64, so that when the rotating part 62 rotates, the flexible body 64 cannot rotate and concentrate at a point. At this time, the rotating part 62 rotates, and the flexible body 64 drives the sliding ring 5 to rotate. While the rotating part 62 rotates, the drive movable part 61 moves a certain distance towards the first end 14. At this time, the part of the flexible body 64 between the sliding ring 5 and the support ring 4 is tightly wrapped around the outer peripheral wall of the main shaft 2, and the flexible body 64 fixes the main shaft 2. When the sliding ring 5 is in the second state, the lifting device can drive the main shaft 2 to move. After the lifting device is lifted to the set position, based on the first state, the rotating part 62 is rotated in the opposite direction. The rotating part 62 drives the sliding ring 5 to reset. After the sliding ring 5 is reset, the sliding ring 5 is switched to the second state. At this time, the sliding ring 5 can only move along the axial direction of the cylindrical receiving cavity 16, and the movable part 61 is reset. Then, the pushing part 63 pushes the main shaft 2 to move a certain distance towards the first end 14 to leave enough space for the flexible body 64 to be wound. Then, the pushing part 63 is moved towards the second end 15, making the space between the rotating part 62 and the main shaft 2 hollow. Finally, the rotating part 62 rotates. As the main shaft 2 is pushed and moved by the pushing member 63, the length of the flexible body 64 between the main shaft 2 and the rotating part 62 increases, and the pushing member 63 no longer obstructs the winding of the flexible body 64. This allows the portion of the flexible body 64 between the main shaft 2 and the rotating part 62 to be wound into a single strand. When the flexible body 64 is wound into a single strand, it can exert a force on the main shaft 2 toward the first end 14, thereby pushing the main shaft 2 toward the first end 14 and allowing the main shaft 2 to exit the housing 1.

[0045] Depending on the winding condition of the flexible body 64, the movable part 61 is driven to move towards the first end 14 to prevent the flexible body 64 from breaking due to excessive force. For example, the movable part 61 may be equipped with a detection component that detects the tension exerted by the flexible body 64 on the movable part 61. When the tension reaches a threshold, the movable part 61 moves a certain distance towards the first end 14.

[0046] Compared to traditional methods of using clamps to fix and drag the spindle 2 or using hydraulic cylinders 67 to push it, the advantages of the drive assembly 6 in this embodiment are: 1. The structure is very simple, the manufacturing cost is lower, and the installation cost is reduced. 2. The deformable structure of the flexible body 64 can reduce the risk of scratches and wear on the peripheral wall of the spindle 2 during the movement of the spindle 2. 3. The device occupies little space and is suitable for use in narrow spaces. 4. The distance that the drive assembly 6 can drive the spindle 2 to move can be flexibly adjusted and is much greater than the travel of the traditional hydraulic cylinder 67. 5. The multiple flexible bodies 64 also apply a force towards the axis of the spindle 2, so that the side of the spindle 2 near the second end 15 can be supported. This prevents one side from being too high and the other side from being too low even when most of the spindle 2 extends out of the housing 1 from the first end 14. Furthermore, it can reduce the wear of the spindle 2 when it moves relative to the housing 1. 6. The distance that the spindle 2 can move can be precisely controlled. 7. The rotating part 62 is disposed at the second end 15 of the receiving cavity 16, so that the rotating part 62 will not obstruct the installation and alignment of the spindle 2. 8. It can be applied to spindles 2 of different sizes.

[0047] See Figure 1 and Figure 7 In some embodiments, the housing 1 is provided with a through groove 12, the length direction of which extends along the axial direction of the receiving cavity 16. The through groove 12 is slidably connected to a guide portion 3. The housing 1 is provided with a limiting portion. The guide portion 3 is provided on the side of the housing 1 near the first end 14. The sliding ring 5 is provided between the limiting portion and the guide portion 3. Along the axial direction of the through groove 12, the guide portion 3 is movably provided with a protrusion 33. The portion of the sliding ring 5 facing the through groove 12 is provided with an insertion recess 52.

[0048] The guide portion 3 may be provided with a locking structure so that the position of the guide portion 3 relative to the housing 1 can be locked. For example, the guide portion 3 may be threadedly connected with a locking bolt 32. When the locking bolt 32 is rotated so that it abuts against the housing 1, the position of the guide portion 3 is locked.

[0049] A protrusion 33 is disposed on the side of the guide portion 3 inside the housing 1. A spring can be disposed between the protrusion 33 and the guide portion 3 so that the protrusion 33 can remain protruding from the guide portion 3. A force-applying part 31 can be disposed on the side of the guide portion 3 outside the housing 1. The force-applying part 31 can be used to drive the protrusion 33 to move.

[0050] When the sliding ring 5 is in the first state, the position of the guide part 3 is adjusted so that the sliding ring 5 is between the limiting part of the housing 1 (not shown in the figure, located inside the housing 1) and the guide part 3. At this time, the protrusion 33 of the guide part 3 is used to abut against the sliding ring 5, so that the sliding ring 5 cannot move to the first end 14, thereby making the sliding ring 5 only able to rotate relative to the housing 1.

[0051] When it is necessary to adjust the sliding ring 5 to the second state, after the sliding ring 5 is reset, the insertion recess 52 of the sliding ring 5 faces the through groove 12. At this time, the position of the guide part 3 is adjusted so that the protrusion 33 can be inserted into the insertion recess 52 of the sliding ring 5, and the sliding ring 5 can no longer rotate relative to the receiving cavity 16.

[0052] Of course, multiple insertion recesses 52 can be set along the circumference of the sliding ring 5, so that the sliding ring 5 does not need to be completely reset, and there can also be corresponding insertion recesses 52 paired with protrusions 33.

[0053] See Figure 1 In some embodiments, the through-slot 12 includes an expansion section 121.

[0054] The expansion section 121 can be located on the side of the through groove 12 near the second end 15.

[0055] The expansion section 121 is used to increase the exposed area of ​​the sliding ring 5. This way, when the sliding ring 5 is reset under the action of the flexible body 64, even if there is a certain positional error, the operator can use tools at the expansion section 121 to finely adjust and rotate the sliding ring 5.

[0056] See Figure 2 In some embodiments, the pushing member 63 includes a main body 632 and abutment 631. The main body 632 is movably connected to the movable part 61 along the axial direction of the receiving cavity 16. The abutment 631 is used to abut against the main shaft 2. An elastic element is provided between the main body 632 and the abutment 631.

[0057] The movable part 61 may be equipped with an electric push rod or a hydraulic cylinder 67, which drives the main body 632 to move.

[0058] The elastic element can be a spring.

[0059] The elastic element serves two purposes. First, it acts as a buffer. When the spindle 2 moves from the first end 14 into the housing 1 towards the second end 15, the housing 1 will eventually impact the abutment part 631. The elastic element can cushion the impact force of the spindle 2. Second, when the sliding ring 5 is in the first state and the drive assembly 6 fixes the spindle 2, the moving part 61 moves towards the first end 14, preventing the main body 632 from pushing the spindle 2. Third, when the sliding ring 5 is in the second state and the pushing component 63 needs to push the spindle 2 a certain distance towards the first end 14, the main body 632 first moves towards the abutment part 631 until they come into contact, ultimately allowing the spindle 2 to move.

[0060] See Figure 2 In some embodiments, the movable part 61 includes a first disc 611 and a second disc 612 spaced apart, a rotating part 62 is disposed between the first disc 611 and the second disc 612, the rotating part 62 is hollow and annular, and a pushing member 63 passes through the rotating part 62.

[0061] The first disc 611 and the second disc 612 can be connected by bolts to form a single unit.

[0062] The specific structure of the rotating part 62 rotatably connected to the first disc 611 and the second disc 612 can refer to the existing structure. For example, the first disc 611 and the second disc 612 can be provided with bearings, and the rotating part 62 is connected to the inner ring of the bearing.

[0063] The rotating part 62 is fixed by the first disc 611 and the second disc 612, making the rotating part 62 a hollow annular structure. The pushing member 63 passes through the rotating part 62 and can abut against the center of the main shaft 2. This reduces the risk of uneven force exerted on the main shaft 2 due to inconsistent winding deformation of the flexible bodies 64. Furthermore, when the pushing member 63 pushes the main shaft 2, the direction of its force extends axially along the main shaft 2.

[0064] See Figure 2 In some embodiments, the peripheral wall of the rotating part 62 is provided with teeth 621, and the movable part 61 is rotatably provided with gear 65, which meshes with the teeth 621.

[0065] Gear 65 can be driven to rotate by motor 66.

[0066] The teeth 621 and gear 65 mesh, allowing the rotating part 62 to be driven to rotate by the motor 66.

[0067] See Figure 4 and Figure 5In some embodiments, the flexible body 64 is provided with a connecting portion 641, and the rotating portion 62 is provided with a plurality of adjusting blocks 622 corresponding to the flexible body 64. The adjusting blocks 622 are provided with adjusting grooves. The connecting portion 641 and the adjusting grooves are movably engaged. The adjusting grooves include a first groove 6222 and a plurality of second grooves 6221. The first groove 6222 extends radially along the rotation circumference of the rotating portion 62, and the second grooves 6221 are spaced apart along the length direction of the first groove 6222. The connecting portion 641 is selectively accommodated in one of the second grooves 6221.

[0068] The connecting part 641 may include a rod 6412 and two limiting discs 6411 spaced apart from the rod 6412. The rod 6412 passes through the adjustment groove, and the limiting discs 6411 are disposed on both sides of the adjustment block 622, so that the rod 6412 will not leave the adjustment groove, thereby allowing the connecting part 641 to move along the adjustment groove.

[0069] When the connecting part 641 is in different second grooves 6221, the distance between the winding points of the multiple flexible bodies 64 and the main shaft 2 can be adjusted, thereby adjusting the force exerted by the drive assembly 6 on the main shaft 2. For example, when the connecting part 641 is in a second groove 6221 close to the rotation axis of the rotating part 62, the winding centers of the multiple flexible bodies 64 are closer to the rotating part 62. Thus, in the initial stage of winding, the force exerted by the flexible bodies 64 on the shaft is small, and gradually increases as the rotating part 62 rotates.

[0070] In this embodiment, the second groove 6221 is located behind the rotating part 62 in the direction of rotation. Meanwhile, the limiting disc 6411 is positionably connected to the rod 6412; for example, the limiting disc 6411 can be threaded onto the rod 6412. Thus, when the rotating part 62 rotates in the direction that causes the flexible body 64 to wind around, the connecting part 641 will not disengage from the second groove 6221. When the rotating part 62 rotates in the opposite direction, due to the reduced force exerted by the flexible body 64 on the rotating part 62, the position of the connecting part 641 can be fixed solely by the clamping action of the two limiting discs 6411.

[0071] In some embodiments, the flexible body 64 includes an ultra-high molecular weight polyethylene rope, or an aramid rope, or a nylon / polyester composite rope.

[0072] The flexible body 64 moves by winding a drive shaft, which requires high structural strength of the flexible body 64 itself. Ultra-high molecular weight polyethylene rope, aramid rope, or nylon / polyester composite rope are selected to ensure that the structural strength of the flexible body 64 meets the requirements without increasing the weight of the flexible body 64.

[0073] See Figure 6 In some embodiments, the guide hole 51 is disposed on the edge of the sliding ring 5, and the guide hole 51 is a notch hole.

[0074] The guide hole 51 is a notched hole, which facilitates the installation of the flexible body 64. Furthermore, the notched hole is easier to machine.

[0075] See Figure 1 In some embodiments, the support ring 4 is tunably connected to the housing 1 along the axial direction of the receiving cavity 16.

[0076] For example, the peripheral wall of the support ring 4 can be provided with a threaded hole, and the housing 1 can be provided with a through hole 13. The support ring 4 is fixed by the threaded connection between the through hole 13 and the threaded hole through the fixing bolt 41. Along the axial direction of the receiving cavity 16, multiple through holes 13 can be provided at intervals, so that the position of the support ring 4 is adjustable.

[0077] The position of the support ring 4 is adjustable, which allows the tension of the flexible body 64 in the initial state to be adjusted, and the rotation angle of the rotating part 62 can also be adjusted when the drive assembly 6 fixes the main shaft 2.

[0078] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A hoisting tool for installing a once-through turbine, characterized in that, include: A housing (1) is used to cooperate with a crane. The housing (1) includes a cylindrical receiving cavity (16) for accommodating a main shaft (2). The receiving cavity (16) includes a first end (14) and a second end (15). A support ring (4) is provided on the inner wall of the first end (14). The main shaft (2) passes through the support ring (4). A sliding ring (5) is provided on the second end (15). The sliding ring (5) slides with the inner wall of the receiving cavity (16). The main shaft (2) passes through the sliding ring (5). The sliding ring (5) is provided with a guide hole (51). The sliding ring (5) is configured to include a first state and a second state. In the first state, the sliding ring (5) can only rotate relative to the receiving cavity (16). In the second state, the sliding ring (5) can only move along the axial direction of the cylindrical receiving cavity (16). The drive assembly (6) includes a movable part (61), a rotating part (62), a pushing component (63), and a plurality of flexible bodies (64). The movable part (61) is movably connected to the housing (1) along the axial direction of the receiving cavity (16). The rotating part (62) is rotatably connected to the movable part (61). One end of the flexible body (64) is connected to the support ring (4), and the other end is connected to the rotating part (62). The plurality of flexible bodies (64) are arranged circumferentially around the rotating part (62). A plurality of guide holes (51) are provided corresponding to the flexible bodies (64). The flexible bodies (64) pass through the guide holes (51). The pushing component (63) is movably connected to the movable part (61) along the axial direction of the receiving cavity (16).

2. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The housing (1) is provided with a through groove (12), the length direction of which extends along the axial direction of the receiving cavity (16). The through groove (12) is slidably connected to a guide part (3). The housing (1) is provided with a limiting part. The guide part (3) is provided on the side of the housing (1) near the first end (14). The sliding ring (5) is provided between the limiting part and the guide part (3). Along the axial direction of the through groove (12), the guide part (3) is movably provided with a protrusion (33). The portion of the sliding ring (5) facing the through groove (12) is provided with an insertion recess (52).

3. The installation hoisting tool for a axial-flow turbine according to claim 2, characterized in that, The through-slot (12) includes an expansion section (121).

4. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The pusher component (63) includes a main body (632) and a stop part (631). The main body (632) is movably connected to the movable part (61) along the axial direction of the receiving cavity (16). The stop part (631) is used to abut against the main shaft (2). An elastic element is provided between the main body (632) and the stop part (631).

5. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The movable part (61) includes a first disc (611) and a second disc (612) spaced apart. The rotating part (62) is disposed between the first disc (611) and the second disc (612). The rotating part (62) is hollow and annular. The pushing component (63) passes through the rotating part (62).

6. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The rotating part (62) has teeth (621) on its peripheral wall, and the movable part (61) is rotatably provided with gears (65), which mesh with the teeth (621).

7. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The flexible body (64) is provided with a connecting part (641), and the rotating part (62) is provided with a plurality of adjusting blocks (622) corresponding to the flexible body (64). The adjusting blocks (622) are provided with adjusting grooves. The connecting part (641) and the adjusting grooves are movably engaged. The adjusting grooves include a first groove (6222) and a plurality of second grooves (6221). The first groove (6222) extends radially along the rotation circumference of the rotating part (62), and the second grooves (6221) are spaced apart along the length direction of the first groove (6222). The connecting part (641) is selectively accommodated in one of the second grooves (6221).

8. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The flexible body (64) includes ultra-high molecular weight polyethylene rope, or aramid rope, or nylon / polyester composite rope.

9. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, The guide hole (51) is located on the edge of the sliding ring (5), and the guide hole (51) is a notch hole.

10. The installation hoisting tool for a axial-flow turbine according to claim 1, characterized in that, Along the axial direction of the receiving cavity (16), the support ring (4) is adjustablely connected to the housing (1).

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