Hoisting device for water diversion pipeline of pumped storage power station

Abstract

The invention relates to the field of water conservancy and hydropower engineering construction equipment, in particular to a hoisting device for a water diversion pipeline of a pumped storage power station, which comprises a gantry crane, a hanging bracket is hung on the gantry crane through a sling, and an encircling mechanism is mounted on the bottom surface of the hanging bracket and used for encircling the outer cylindrical surface of the hoisted water diversion pipeline. External radial constraints are provided. The left end and the right end of the lifting frame are respectively provided with a telescopic plate assembly, each telescopic plate assembly is provided with an inner supporting assembly, and the inner supporting assemblies are used for extending into the end of the lifted water diversion pipeline and supporting the inner wall surface of the end of the water diversion pipeline to provide internal radial support. By means of the mode that the external surrounding mechanism is combined with the internal supporting assembly, the middle of the water diversion pipeline is clamped during hoisting, meanwhile, the end of the pipeline is supported, deformation of the end of the water diversion pipeline due to concentrated stress is effectively prevented, and the geometric shape precision of a pipe opening is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of construction equipment for water conservancy and hydropower projects, and in particular to a hoisting device for water diversion pipelines of pumped storage power stations. Background Technology

[0002] Pumped storage power stations, as crucial infrastructure for regulating grid load stability, are typically located in high-altitude, rugged mountainous areas. The water diversion pipeline, a key component connecting the upper reservoir and the underground powerhouse, is usually designed as a large-diameter, thin-walled steel structure to meet high-flow-rate requirements and control structural weight. However, this high diameter-to-thickness ratio results in relatively low radial stiffness, making the pipeline highly susceptible to elastic or plastic deformation under external forces during hoisting, transportation, and docking.

[0003] Existing water diversion pipeline hoisting operations mostly rely on large gantry cranes in conjunction with flexible slings or rigid external clamps. Existing hoisting devices include, for example, a hoisting device for culverts used in municipal construction disclosed in patent CN214422082U, and a hoisting device for cement culverts disclosed in patent CN218879171U.

[0004] In the aforementioned prior art, the lifting points are all at the ends of the pipe. If used to lift large-diameter, thin-walled water pipes, it can easily cause changes in the geometry of the pipe opening, that is, deformation of the lifting points at both ends of the water pipe, which will seriously affect the coaxiality and welding quality of the subsequent pipe connection process. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art and provide a hoisting device for the water intake pipeline of a pumped storage power station. It can hug the pipeline from the outside while providing support from the inside of both ends of the pipeline, thereby effectively preventing deformation of the pipeline ends during hoisting, especially preventing deformation of the pipe opening, and ensuring the accuracy of subsequent docking and installation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hoisting device for a water intake pipeline of a pumped storage power station includes a gantry crane. The gantry crane suspends a hanger via slings. A circumferential mechanism is installed on the bottom surface of the hanger to encircle the outer cylindrical surface of the water intake pipeline being hoisted, providing external radial constraint. Telescopic plate assemblies are installed at the left and right ends of the hanger, and an inner support assembly is installed on each telescopic plate assembly. The inner support assembly extends into the end of the water intake pipeline being hoisted and supports the inner wall of the end of the pipeline, providing internal radial support.

[0007] Furthermore, the circumferential mechanism includes two guide plates and multiple arc-shaped clamping plates; the two guide plates are respectively installed on the bottom surface of the hanger near the front and rear edges; a sliding groove is provided on the guide plate, and multiple sliding plates are slidably installed in the sliding groove of each guide plate, the sliding plates can reciprocate along the length direction of the guide plate; the end of the sliding plate away from the guide plate is a cantilever end; a vertical first mounting plate is welded to the bottom surface of the cantilever end of each sliding plate; a hydraulic cylinder is installed at the lower part of the first mounting plate, and an arc-shaped clamping plate is installed at the end of the piston rod of each hydraulic cylinder; all the arc-shaped clamping plates are divided into front and rear groups, and the two groups of arc-shaped clamping plates are arranged opposite each other to grip the suspended water pipe from the front and rear sides.

[0008] Furthermore, a scissor bracing mechanism is installed on all the first mounting plates corresponding to each guide plate; two sets of drive components are installed on the hanger, which are used to drive the first mounting plates corresponding to the two guide plates to disperse or converge along the length direction of the guide plate.

[0009] Furthermore, each drive assembly includes a motor, a first rack, and a second rack; the motor is fixedly mounted on the hanger, and the output shaft of the motor is connected to a rotating shaft via a coupling, on which a gear is mounted; a first connecting plate is provided on the top surface of the slide plate near the left end of the guide plate; a second connecting plate is provided on the top surface of the slide plate near the right end of the guide plate; the left end of the first rack is fixedly mounted on the top of the first connecting plate; the right end of the second rack is fixedly mounted on the top of the second connecting plate; the second rack and the first rack are spaced apart vertically and mesh with the gear simultaneously.

[0010] Furthermore, the telescopic plate assembly includes an outer shell plate and a sliding plate; one end of the outer shell plate is fixedly mounted on the hanger; the sliding plate is slidably installed in the inner cavity of the outer shell plate, and the sliding plate extends out from the cantilever end of the outer shell plate; a limiting plate is provided at the end of the sliding plate located inside the outer shell plate; a stop is provided at the opening of the inner cavity of the outer shell plate to block and limit the limiting plate.

[0011] Furthermore, two guide rods are provided in the inner cavity of the outer shell plate, and guide holes are provided on the limiting plate; the guide rods slide in conjunction with the guide holes on the limiting plate; a return spring is sleeved on the guide rod, one end of the return spring abuts against the inner wall of the outer shell plate, and the other end abuts against the limiting plate; the return spring is always in a compressed and energy-storing state, providing a tendency for the sliding plate to extend outward; a take-up roller is installed on the rotating shaft of the drive assembly, and a steel cable is wound on the take-up roller; the end of the steel cable is connected to the limiting plate. When the drive assembly drives the first mounting plate to disperse along the length direction of the guide plate, the rotating shaft rotates, causing the take-up roller to take in the steel cable, pulling the limiting plate and overcoming the elastic force of the return spring, causing the sliding plate to retract. When the drive assembly drives the first mounting plate to move closer along the length direction of the guide plate, the take-up roller releases the steel cable, and under the action of the return spring, pushes the sliding plate outward. This achieves a linkage operation.

[0012] Further, the inner support assembly is mounted on the shrink plate assembly via a second mounting plate; the inner support assembly includes a threaded rod, a round rod, and multiple extrusion plates; a threaded sleeve is screwed onto the threaded rod. One end of the threaded rod is fixed to the second mounting plate, and the other end is cantilevered; a round rod is provided at the cantilever end of the threaded rod, and a fixing collar is fixedly fitted at the cantilever end of the round rod; a sliding collar is slidably fitted on the round rod. A driving collar is fitted on the threaded rod, and the inner wall of the driving collar is spaced apart from the threaded rod; an annular groove is formed on the inner wall of the driving collar; the driving collar and the sliding collar are connected by a connecting sleeve; an annular platform is integrally formed at one end of the threaded sleeve, and the annular platform is engaged in the annular groove, and the two are slidably fitted, that is, they can slide relative to each other but cannot be axially separated. A first connecting rod is hinged between the fixing collar and the extrusion plate; a second connecting rod is hinged between the sliding collar and the extrusion plate; and a third connecting rod is hinged between the driving collar and the extrusion plate. The threaded sleeve is rotated manually, and it moves axially along the threaded rod, which drives the drive collar and sliding collar to move synchronously. In turn, the connecting rod pushes the extrusion plate to move radially, so that multiple extrusion plates can expand or contract radially at the same time, thus tightly adhering to or detaching from the inner wall of the pipe.

[0013] Furthermore, each inner support assembly has at least three extrusion plates, which are evenly distributed in a ring around the axis of the circular rod to ensure uniform support for the tube wall.

[0014] Furthermore, a corrugated plate made of rubber is bonded to the supporting surface of the extrusion plate. This design increases the friction with the inner wall of the pipe, while the elastic deformation capacity of the rubber can compensate for the unevenness of the inner wall of the pipe and provide cushioning protection to avoid scratching the pipe wall.

[0015] Furthermore, a blocking plate is provided on the threaded rod, and the blocking plate is located near the second mounting plate. The blocking plate is used to block and limit the threaded sleeve to prevent the inner support assembly from excessively contracting.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) By combining the external circumferential mechanism with the internal support component, the middle part of the water pipe is clamped during hoisting, while the end of the pipe is supported. This effectively prevents the deformation of the end of the water pipe caused by concentrated force and ensures the geometric accuracy of the pipe opening.

[0017] (2) The external clamping mechanism uses multiple independently adjustable arc-shaped clamps, which are synchronously gathered or dispersed through a drive assembly. When lifting the water pipe, the drive assembly drives each first mounting plate to disperse along the length of the guide plate, so that the multiple arc-shaped clamps are evenly distributed along the length of the water pipe and clamp the pipe, thereby dispersing the clamping force and avoiding deformation caused by local stress concentration. The hydraulic cylinder provides a stable clamping force, and the pressure is adjustable to avoid damaging the pipe wall.

[0018] (3) The internal support assembly is ingeniously designed. Through the threaded sleeve driving the linkage mechanism, the synchronous radial movement of multiple extrusion plates is achieved, providing stable and reliable support. The rubber corrugated plate increases friction and buffering, protecting the anti-corrosion layer inside the pipeline.

[0019] (4) Through the linkage design of the take-up roller, steel cable and return spring, the dispersing and gathering action of the first mounting plate of the external circling mechanism is associated with the extension / retraction action of the inner support component, realizing the automated linkage control of the hoisting process. When the water pipe is hoisted, when the drive component drives the first mounting plate to disperse, the inner support component automatically extends into the end of the pipe; otherwise, the inner support component automatically retracts, making the operation process simple and efficient. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the hoisting device provided by the present invention.

[0022] Figure 2 This is a schematic diagram of the hoisting device provided by the present invention after removing the gantry crane.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0024] Figure 4 This is a three-dimensional structural diagram of the encircling mechanism in this invention.

[0025] Figure 5 This is a schematic diagram of one set of driving components in this invention.

[0026] Figure 6 This is a schematic diagram of the structure of the guide plate, slider, and slide plate in this invention.

[0027] Figure 7 This is a schematic diagram of the telescopic plate assembly in this invention.

[0028] Figure 8 This is a schematic diagram of the internal support component in this invention.

[0029] Figure 9 for Figure 8 Enlarged view of section B in the middle.

[0030] Reference numerals: 1. Gantry crane; 2. Hanger; 3. Guide plate; 4. Slide plate; 5. Slider; 6. First mounting plate; 7. Hydraulic cylinder; 8. Arc-shaped clamp; 9. Hinge frame; 10. Motor; 11. Shaft; 12. Gear; 13a. First rack; 13b. Second rack; 14a. First connecting plate; 14b. Second connecting plate; 15. Take-up roller; 16. Outer shell plate; 16a. Stop; 17. Sliding plate; 18. Second mounting plate; 19. 20. Threaded rod; 21a. Round rod; 21b. Fixed collar; 21c. Sliding collar; 22. Drive collar; 23a. Connecting sleeve; 23b. First connecting rod; 23c. Third connecting rod; 24. Extrusion plate; 25. Corrugated plate; 26. Ring platform; 27. Threaded sleeve; 28. Limiting plate; 29. ​​Guide rod; 30. Return spring; 31. Blocking plate; 32. Steel cable; 100. Water pipe; 200. Telescopic plate assembly. Detailed Implementation

[0031] 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0034] Combination Figures 1 to 9 The image shows a specific embodiment of a hoisting device for a water intake pipeline of a pumped storage power station provided by the present invention. The hoisting device mainly includes a gantry crane 1, a gantry crane 2, a circumferential mechanism, a telescopic plate assembly 200, and an internal support assembly. The gantry crane 1 provides lifting power and mobility for the entire device, and it suspends the gantry crane 2 via slings. The gantry crane 2 is a rigid frame structure and serves as the installation foundation for other functional components.

[0035] The core of this invention lies in the internal and external collaborative clamping system integrated on the hanger 2. The specific structure is as follows: A circling mechanism is installed on the bottom surface of the hanger 2 to circumferentially encircle the outer column surface of the water pipe 100 being hoisted; telescopic plate assemblies 200 are respectively installed at the left and right ends of the hanger 2, and an inner support assembly is installed on each telescopic plate assembly 200. The inner support assembly is used to extend into the end of the water pipe 100 being hoisted and support the inner wall surface of the end of the water pipe 100.

[0036] The encircling mechanism includes two guide plates 3 and multiple arc-shaped clamping plates 8. Specifically, the two guide plates 3 are respectively installed on the bottom surface of the hanger 2 near the front and rear edges. The guide plates 3 are elongated structures, with grooves on each guide plate 3, and several sliding plates 4 are slidably installed in the grooves. To prevent the sliding plates 4 from falling out of the grooves, a slider 5 is provided at one end of the sliding plate 4 inside the groove, and the slider 5 slides in cooperation with the rectangular groove in the guide plate 3, allowing the sliding plate 4 to reciprocate along the length of the guide plate 3. The end of the sliding plate 4 away from the guide plate 3 is a cantilever end; a vertical first mounting plate 6 is welded to the bottom surface of the cantilever end of each sliding plate 4; a hydraulic cylinder 7 is installed at the lower part of the first mounting plate 6, and an arc-shaped clamping plate 8 is installed at the end of the piston rod of each hydraulic cylinder 7. The hydraulic cylinder 7 serves as the power source for the clamping action, driving the arc-shaped clamping plates 8 to move to complete the clamping or releasing operation. In this embodiment, the arc-shaped clamp 8 is designed as an arc-shaped structure that matches the curvature of the outer cylindrical surface of the water pipe 100, so as to increase the contact area and prevent stress concentration from damaging the anti-corrosion layer of the pipe.

[0037] Combination Figure 4 and Figure 5 As shown, all the arc-shaped clamping plates 8 are divided into two groups, and the two groups of arc-shaped clamping plates 8 are arranged opposite each other. Furthermore, a scissor bracing mechanism 9 is commonly installed on all the first mounting plates 6 corresponding to each guide plate 3. Two sets of drive components are installed on the hanger 2, which are used to drive the first mounting plates 6 corresponding to the two guide plates 3 to disperse or converge along the length of the guide plate 3. The purpose of setting the scissor bracing mechanism 9 is to make all the first mounting plates 6 installed on the same guide plate 3 disperse or converge synchronously. The scissor bracing mechanism 9 is conventional existing technology, commonly used in electric retractable gates, and will not be described in detail here. At the same time, the scissor bracing mechanism 9 also enhances the overall structural rigidity.

[0038] Combination Figure 5As shown, each drive assembly includes a motor 10, a first rack 13a, and a second rack 13b. The motor 10 is fixedly mounted on the hanger 2. The output shaft of the motor 10 is connected to a rotating shaft 11 via a coupling, and a gear 12 is mounted on the rotating shaft 11. A first connecting plate 14a is provided on the top surface of the slide plate 4 near the left end of the guide plate 3. A second connecting plate 14b is provided on the top surface of the slide plate 4 near the right end of the guide plate 3. The left end of the first rack 13a is fixedly mounted on the top of the first connecting plate 14a. The right end of the second rack 13b is fixedly mounted on the top of the second connecting plate 14b. The second rack 13b and the first rack 13a are spaced apart vertically and mesh with the gear 12 simultaneously. When the motor 10 rotates forward and backward, the gear 12 drives the two racks to move left and right, thereby driving all the slide plates 4 and the first mounting plate 6 to converge or disperse synchronously along the guide plate 3, causing the arc-shaped clamping plates 8 to disperse or converge. Finally, the hydraulic cylinder 7 drives the arc-shaped clamping plates 8 to perform the final clamping action.

[0039] Combination Figure 2 and Figure 7 As shown, the telescopic plate assembly 200 includes a housing plate 16 fixed to the hanger 2 and a sliding plate 17 slidably inserted into its inner cavity. Specifically, one end of the housing plate 16 is fixedly mounted on the hanger 2; the sliding plate 17 is slidably mounted in the inner cavity of the housing plate 16, and the sliding plate 17 extends out from the cantilever end of the housing plate 16. A limiting plate 28 is provided at the end of the sliding plate 17 located inside the housing plate 16; a stop block 16a is provided at the opening of the inner cavity of the housing plate 16 to block and limit the limiting plate 28, thereby limiting the maximum extension position of the sliding plate 17.

[0040] Furthermore, two guide rods 29 are provided in the inner cavity of the outer shell plate 16, and guide holes are provided on the limiting plate 28; the guide rods 29 pass through the guide holes on the limiting plate 28, and the guide rods 29 slide in cooperation with the guide holes on the limiting plate 28. A return spring 30 is sleeved on the guide rods 29, one end of the return spring 30 abuts against the inner wall of the outer shell plate 16, and the other end abuts against the limiting plate 28; the return spring 30 is always in a compressed and energy-storing state, providing an outward thrust for the sliding plate 17. The key linkage mechanism is that a take-up roller 15 is also installed on the rotating shaft 11 of the drive assembly, and a steel cable 32 is wound on the take-up roller 15; the end of the steel cable 32 is connected to the limiting plate 28.

[0041] When the drive assembly drives the slide plate 4 together with the first mounting plate 6 installed on the slide plate 4 to disperse along the length direction of the guide plate 3, the corresponding arc clamping plate 8 disperses along the axial direction of the suspended water pipe 100. At this time, the take-up roller 15 winds up the steel cable 32, pulls the limiting plate 28 and overcomes the elastic force of the reset spring 30, causing the sliding plate 17 to retract. At the same time, it drives the inner support assembly to enter the end of the water pipe 100.

[0042] When the drive assembly drives the slide plate 4 together with the first mounting plate 6 mounted on the slide plate 4 to move closer along the length of the guide plate 3, the take-up roller 15 releases the steel cable 32, and pushes the sliding plate 17 out under the action of the return spring 30, while at the same time pulling the inner support assembly out from the end of the water pipe 100.

[0043] Combination Figure 8 and Figure 9 As shown, the inner support assembly is mounted on the shrink plate assembly 200 via a second mounting plate 18, which is mounted on the bottom surface of the cantilever end of the sliding plate 17. The inner support assembly includes a threaded rod 19, a round rod 20, and multiple extrusion plates 24; a threaded sleeve 27 is screwed onto the threaded rod 19. One end of the threaded rod 19 is fixed to the second mounting plate 18, and the other end is cantilevered. A round rod 20 is provided at the cantilever end of the threaded rod 19, and a fixing collar 21a is fixedly fitted at the cantilever end of the round rod 20, meaning the fixing collar 21a is fixed relative to the round rod 20 and cannot slide. A sliding collar 21b is slidably fitted onto the round rod 20, meaning the sliding collar 21b can slide along the axial direction of the round rod 20. A driving collar 21c is fitted onto the threaded rod 19, with its inner wall spaced apart from the threaded rod 19. An annular groove 210c is formed on the inner wall of the driving collar 21c. The driving collar 21c and the sliding collar 21b are connected by a connecting sleeve 22. The connecting sleeve 22 is fitted onto the shaft formed by the threaded rod 19 and the round rod 20. The inner diameter of the connecting sleeve 22 is larger than the outer diameter of the threaded rod 19 and the round rod 20 to ensure smooth movement. An annular platform 26 is integrally formed at one end of the threaded sleeve 27. The annular platform 26 is engaged within the annular groove 210c, and the two are in a sliding fit, meaning they can slide relative to each other but cannot axially disengage. The fixed collar 21a is hinged to the extrusion plate 24 by a first connecting rod 23a; the sliding collar 21b is hinged to the extrusion plate 24 by a second connecting rod 23b; and the driving collar 21c is hinged to the extrusion plate 24 by a third connecting rod 23c.

[0044] In this embodiment, each inner support assembly has at least three extrusion plates 24, which are evenly distributed in a ring around the axis of the round rod 20.

[0045] Furthermore, a corrugated plate 25, made of rubber, is bonded to the supporting surface of the extrusion plate 24. The purpose of the corrugated plate 25 is to provide cushioning protection and prevent scratches on the pipe wall. Simultaneously, the corrugated surface of the corrugated plate 25 in contact with the inner wall of the pipe increases friction and prevents slippage.

[0046] A blocking plate 31 is provided on the threaded rod 19, and the blocking plate 31 is located near the second mounting plate 18. The blocking plate 31 is used to block and limit the threaded sleeve 27 to prevent the inner support assembly from shrinking excessively.

[0047] The working principle of the inner support assembly is as follows: When the sliding plate 17 retracts, it drives the inner support assembly into the interior of the water pipe 100. The threaded sleeve 27 can be rotated manually. Since the threaded sleeve 27 is threadedly engaged with the threaded rod 19, the threaded sleeve 27 moves axially along the threaded rod 19, which drives the drive collar 21c and the sliding collar 21b to move synchronously. The combined action of the first connecting rod 23a, the second connecting rod 23b, and the third connecting rod 23c pushes the extrusion plate 24 to move radially, so that the multiple extrusion plates 24 can expand or contract radially synchronously, thereby tightly adhering to or separating from the inner wall of the end of the water pipe 100.

[0048] The hoisting device provided in this embodiment achieves a dual fixing mode of "external clamping and internal support". Externally, the arc-shaped clamping plate 8 driven by the hydraulic cylinder 7 clamps the water pipe 100, while internally, it is radially supported by the internal support assembly. This not only improves the stability of hoisting, but more importantly, the internal support assembly, as a rigid support core, effectively offsets part of the radial pressure applied during external clamping, preventing deformation of the end of the water pipe 100 during hoisting.

[0049] The working principle of the hoisting device provided in this embodiment is as follows: The operator controls the gantry crane 1, driving the lifting frame 2 to move above the water pipe 100 to be lifted. At this time, the piston rod of the hydraulic cylinder 7 is in the retracted state, and the two sets of arc-shaped clamps 8 are located at the front and rear sides of the water pipe 100, respectively. At this time, the sliding plate 17 is in the extended state, and the inner support assembly is not inserted into the water pipe 100. Then, the motor 10 of the drive assembly is started, and the motor 10 drives the rotating shaft 11 to rotate. At this time, two linked actions occur: First, the rotating shaft 11 drives the gear 12 to rotate, which drives the first rack 13a to move to the left and the second rack 13b to move to the right, causing all the slide plates 4 and the first mounting plate 6 to disperse synchronously along the long direction of the guide plate 3, so that the arc-shaped clamping plate 8 disperses along the axial direction of the water pipe 100, thereby adjusting the clamping position of the arc-shaped clamping plate 8.

[0050] Second, the rotating shaft 11 drives the take-up roller 15 to rotate synchronously and wind up the steel cable 32. The steel cable 32 pulls the limiting plate 28 to overcome the resistance of the reset spring 30 and slides along the guide rod 29, causing the sliding plate 17 to retract. At the same time, it drives the inner support assembly in the retracted state to enter the end of the water pipe 100.

[0051] After the inner support assembly is fully inserted into the port of the water inlet pipe 100, the threaded sleeve 27 is rotated manually. Since the threaded rod 19 is fixed, the threaded sleeve 27 moves axially along the threaded rod 19 under the influence of the thread, driving the drive collar 21c and the sliding collar 21b to move synchronously. The combined action of the first connecting rod 23a, the second connecting rod 23b, and the third connecting rod 23c pushes the extrusion plate 24 to expand radially outward until the corrugated plate 25 is tightly pressed against the inner wall of the water inlet pipe 100, forming a rigid internal support to prevent pipe port deformation.

[0052] The hydraulic cylinder 7 is activated, causing its piston rod to extend and drive the arc-shaped clamping plate 8 to grip the outer cylindrical surface of the water pipe 100. At this time, the water pipe 100 is fixed by the "inner support and outer clamping", and the lifting operation can be carried out.

[0053] After hoisting is completed, the piston rod of hydraulic cylinder 7 retracts to release the external clamps, thus separating the arc-shaped clamping plate 8 from the water pipe 100. The threaded sleeve 27 is rotated in the opposite direction, causing the pressing plate 24 to radially retract and releasing the internal support. Subsequently, motor 10 reverses, gear 12 drives rack plate 13 to reset, all sliding plates 4 converge, thereby causing the arc-shaped clamping plate 8 to converge axially along the water pipe 100. Simultaneously, take-up roller 15 releases steel cable 32, and under the elastic restoring force of return spring 30, limit plate 28 pushes sliding plate 17 out of outer shell plate 16, driving the inner support assembly to be pulled out of the water pipe 100. The next hoisting operation can then proceed.

[0054] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A hoisting device for a water intake pipeline of a pumped storage power station, comprising a gantry crane (1), wherein the gantry crane (1) is equipped with a sling (2), characterized in that, A circling mechanism is installed on the bottom surface of the hanger (2) for circling the outer column surface of the water pipe (100) being hoisted; Telescopic plate assemblies (200) are installed at the left and right ends of the hanger (2), and an inner support assembly is installed on each telescopic plate assembly (200). The inner support assembly is used to extend into the end of the water pipe (100) being hoisted and support the inner wall of the end of the water pipe (100).

2. The hoisting device according to claim 1, characterized in that, The encircling mechanism includes two guide plates (3) and multiple arc-shaped clamping plates (8); Two guide plates (3) are respectively installed on the bottom surface of the hanger (2) near the front and rear edges; A groove is provided on the guide plate (3), and multiple slide plates (4) are slidably installed in the groove of each guide plate (3). The slide plates (4) can slide back and forth along the length direction of the guide plate (3); the end of the slide plate (4) away from the guide plate (3) is a cantilever end. A vertical first mounting plate (6) is welded to the bottom surface of the cantilever end of each slide plate (4); a hydraulic cylinder (7) is installed on the lower part of the first mounting plate (6), and an arc-shaped clamping plate (8) is installed at the end of the piston rod of each hydraulic cylinder (7). All the curved clamps (8) are divided into two groups, and the two groups of curved clamps (8) are set opposite to each other.

3. The hoisting device according to claim 2, characterized in that, A scissor bracing mechanism (9) is installed on all the first mounting plates (6) corresponding to each guide plate (3); Two sets of drive components are installed on the hanger (2). The two sets of drive components are used to drive the first mounting plate (6) corresponding to the two block guide plates (3) to disperse or converge along the length direction of the guide plate (3).

4. The hoisting device according to claim 3, characterized in that, Each drive assembly includes a motor (10), a first rack (13a), and a second rack (13b). The motor (10) is fixedly mounted on the hanger (2). The output shaft of the motor (10) is connected to a rotating shaft (11) via a coupling, and a gear (12) is mounted on the rotating shaft (11). A first connecting plate (14a) is provided on the top surface of the slide plate (4) near the left end of the guide plate (3); a second connecting plate (14b) is provided on the top surface of the slide plate (4) near the right end of the guide plate (3). The left end of the first rack (13a) is fixedly installed on the top of the first connecting plate (14a); The right end of the second rack (13b) is fixedly installed on the top of the second connecting plate (14b); The second rack (13b) is arranged vertically and vertically at intervals with the first rack (13a), and simultaneously meshes with the gear (12).

5. The hoisting device according to claim 4, characterized in that, The telescopic plate assembly (200) includes an outer shell plate (16) and a sliding plate (17); one end of the outer shell plate (16) is fixedly mounted on the hanger (2); the sliding plate (17) is slidably installed in the inner cavity of the outer shell plate (16), and the sliding plate (17) extends out from the cantilever end of the outer shell plate (16); A limiting plate (28) is provided at the end of the sliding plate (17) located inside the outer shell plate (16). The inner cavity of the outer shell plate (16) is provided with a stop (16a) for blocking and limiting the limiting plate (28).

6. The hoisting device according to claim 5, characterized in that, Two guide rods (29) are provided in the inner cavity of the outer shell plate (16), and guide holes are provided on the limiting plate (28); the guide rods (29) slide in cooperation with the guide holes on the limiting plate (28); A return spring (30) is sleeved on the guide rod (29). One end of the return spring (30) abuts against the inner wall of the outer shell plate (16), and the other end abuts against the limiting plate (28). The return spring (30) is always in a compressed and stored state. A take-up roller (15) is mounted on the rotating shaft (11), and a steel cable (32) is wound on the take-up roller (15); the steel cable (32) is connected to the limiting plate (28); When the drive assembly drives the first mounting plate (6) to disperse along the length direction of the guide plate (3), the take-up roller (15) winds up the steel cable (32), pulls the limiting plate (28) and overcomes the elastic force of the reset spring (30), causing the sliding plate (17) to retract. When the drive assembly drives the first mounting plate (6) to move closer along the length of the guide plate (3), the take-up roller (15) releases the steel cable (32) and pushes the sliding plate (17) out under the action of the reset spring (30).

7. The hoisting device according to claim 1, characterized in that, The inner support assembly is mounted on the shrink plate assembly (200) via a second mounting plate (18); the inner support assembly includes a threaded rod (19), a round rod (20) and a plurality of extrusion plates (24); a threaded sleeve (27) is screwed onto the threaded rod (19); One end of the threaded rod (19) is fixed to the second mounting plate (18), and the other end is cantilevered; a round rod (20) is provided at the cantilever end of the threaded rod (19), and a fixing collar (21a) is fixedly fitted at the cantilever end of the round rod (20); a sliding collar (21b) is slidably fitted on the round rod (20). A drive collar (21c) is fitted onto the threaded rod (19), and the inner wall of the drive collar (21c) is spaced apart from the threaded rod (19); an annular groove (210c) is formed on the inner wall of the drive collar (21c). The driving collar (21c) and the sliding collar (21b) are connected by a connecting sleeve (22); An annular platform (26) is integrally formed at one end of the threaded sleeve (27), and the annular platform (26) is engaged in the annular groove (210c) and the two are slidably fitted together. The fixed collar (21a) is hinged to the extrusion plate (24) by a first connecting rod (23a); the sliding collar (21b) is hinged to the extrusion plate (24) by a second connecting rod (23b); and the driving collar (21c) is hinged to the extrusion plate (24) by a third connecting rod (23c).

8. The hoisting device according to claim 7, characterized in that, The number of extrusion plates (24) on each inner support assembly is at least three, and they are evenly distributed in a ring around the axis of the round rod (20).

9. The hoisting device according to claim 7, characterized in that, A corrugated plate (25) is bonded to the support surface of the extrusion plate (24), and the corrugated plate (25) is made of rubber.

10. The hoisting device according to claim 7, characterized in that, A blocking plate (31) is provided on the threaded rod (19), and the blocking plate (31) is located near the second mounting plate (18). The blocking plate (31) is used to block and limit the threaded sleeve (27).

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