Anti-overturning mechanism for paddle hoisting

Abstract

The utility model relates to the technical field of hoisting, and particularly discloses an anti-overturning mechanism for paddle hoisting. Comprising at least one pair of balance lifting appliances which are symmetrically arranged, and each balance lifting appliance is composed of a coating structure and a lifting connecting part. The wrapping structure is provided with a wrapping inner cavity matched with the shape of the corner of the bottom of the paddle, and stable wrapping and clamping of the paddle are achieved through a first wrapping side plate, a second wrapping side plate and a bearing bottom plate. The hoisting connecting part comprises a first lifting lug and a second lifting lug which are respectively arranged on the outer sides of the two side plates; and each lifting lug is provided with a mounting hole for mounting an auxiliary hanging tool. By means of the unique double-lifting-point symmetrical design and the wrapping type clamping structure, the problems of overturning and unbalance caused by gravity center shifting in the traditional paddle lifting process are effectively solved, and dynamic gravity center compensation is achieved. And an anti-falling hanging tool, an observation window and a pressure sensing unit are arranged in the mechanism, so that the hoisting safety and controllability are further improved.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology, and in particular to an anti-overturning mechanism for paddle hoisting. Background Technology

[0002] In the manufacturing and maintenance of large rotating equipment such as water turbines and steam turbines, the hoisting of blades is a critical process. Because blades typically have asymmetrical aerodynamic structures, their center of gravity often deviates from their geometric center, making traditional hoisting methods prone to tilting, overturning, or even falling. Existing technologies often employ single lifting points or simple clamps, which struggle to dynamically adapt to the different center of gravity distributions of the blades. This instability is particularly pronounced in confined spaces or precision assembly scenarios, severely impacting operational safety and efficiency.

[0003] Currently, some improved solutions attempt to balance the load by using counterweights or manually adjusting the sling length, but these methods suffer from low adjustment accuracy and cumbersome operation. Furthermore, conventional lifting equipment lacks effective protection and anti-slip features for the blade's bottom corners, making it prone to blade slippage during lifting due to vibration or external forces. Therefore, there is an urgent need for a specialized lifting mechanism that can automatically compensate for center of gravity shifts, prevent blade overturning, and adapt to blades of different specifications, in order to address the core issues of poor safety and insufficient adaptability in existing technologies.

[0004] The patent "A Blade Lifting Tool for Axial-Flow Turbines" (Publication No. CN212475818U, hereinafter referred to as Prior Art 1) discloses a blade lifting tool. Prior Art 1 achieves non-destructive lifting of axial-flow turbine blades through adjustable clamping components and a moving structure. The blade is fixed to the flange hole of the turbine blade via a flange connector, serving as the lifting base. The moving component slides along the support rod to accommodate blades of different lengths; adjusting bolts can adjust the tilt angle of the clamping component for easy blade insertion. A telescopic hydraulic cylinder drives the clamping plate to clamp the blade, eliminating the need for drilling and protecting the blade structure. The inner side of the clamping plate is equipped with rubber pads, helical springs, and wear-resistant pads to buffer the clamping force and prevent slippage and wear.

[0005] The lifting tools in the prior art 1 cannot achieve good lifting results for large blades. Since the prior art 1 uses clamping lifting, and the blades have a large weight, the blades may fall off or become unstable during lifting, thus affecting the safety and efficiency of the lifting. Utility Model Content

[0006] In view of this, this utility model provides an anti-overturning mechanism for turbine blade hoisting, which solves the problem of overturning and imbalance during the hoisting process caused by the shift of the center of gravity.

[0007] This utility model embodiment provides an anti-overturning mechanism for propeller blade hoisting, including a balancing lifting device. The balancing lifting device includes: a covering structure for covering the corner of the bottom edge of the propeller blade; and lifting connecting parts located on both sides outside the covering structure for connecting with lifting ropes. The covering structure has an inner cavity, the inner contour of which is adapted to the shape of the bottom edge of the propeller blade. All the balancing lifting devices are connected to the lifting connecting parts via lifting ropes and converge at the lifting head. During propeller blade hoisting, at least one pair of balancing lifting devices is used to cover the propeller blade to compensate for the shift in the hoisting center of gravity.

[0008] Preferably, the covering structure includes a first covering side plate and a second covering side plate; one side of the first covering side plate and the second covering side plate are connected in a smooth arc transition, and the other side is fixedly connected by a supporting base plate.

[0009] Preferably, the hoisting connection includes a first lifting lug and a second lifting lug; the first lifting lug and the second lifting lug are respectively fixedly disposed on the outer side of the first covering side plate and the second covering side plate.

[0010] Preferably, the first and second lifting lugs are respectively provided with mounting holes for installing auxiliary hangers.

[0011] Preferably, the auxiliary hanger includes a hanger body, a first fastening bolt, and a fastening nut; the hanger body is arranged in a ring shape with a hanging hole in the center area; the two ends of the hanger body are provided with a first fastening arm and a second fastening arm; the first fastening arm and the second fastening arm are respectively provided with a first fastening hole and a second fastening hole.

[0012] Preferably, the bolt is installed by passing through the first fastening hole, the mounting hole and the second fastening hole, and the auxiliary hanger is installed on the first lifting lug and the second lifting lug by fastening the nut.

[0013] Preferably, one end of the bolt is also provided with an anti-detachment component, and after the bolt and the nut are installed, the anti-detachment component is used to prevent the auxiliary hanger from falling off the first and second lifting lugs.

[0014] Preferably, an observation window is provided at the smooth arc transition between the first and second covering side plates, and the observation window is in communication with the inner cavity of the package.

[0015] Preferably, the first and / or second covered side plates are further provided with a third fastening hole, and the balance hoist is fastened to the blade by installing a second fastening bolt in the third fastening hole to abut against the blade.

[0016] Preferably, during the blade hoisting, at least one pair of balancing slings are provided between the hoisting head and the balancing hoist to monitor the hoisting tension on both sides of the blade; the balancing slings are also equipped with a force gauge and a balancing hoist.

[0017] The anti-overturning mechanism for blade hoisting provided by this utility model has the following beneficial effects:

[0018] This invention effectively solves the problem of center of gravity shift in traditional hoisting by setting symmetrically distributed anti-overturning mechanisms at the bottom of the blades, utilizing a wrapping structure that matches the shape of the blade edges and corners, and a dual-lifting-point connection design. The wrapping structure automatically adapts to the blade's center of gravity distribution, achieving dynamic balance compensation and preventing tilting and overturning during hoisting. The symmetrically arranged hoisting connections and auxiliary attachments provide redundant protection, significantly improving vibration resistance and anti-fall-off capabilities. The observation window allows for real-time monitoring of the hoisting status, further ensuring operational safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0020] Figure 1 This is a schematic diagram of the lifting structure of an anti-overturning mechanism for propeller lifting;

[0021] Figure 2 This is a structural diagram of an anti-overturning mechanism for blade hoisting;

[0022] Figure 3 This is a schematic diagram of the assembly structure of the balancing hoist and auxiliary hangers;

[0023] Figure 4 This is a structural diagram of the auxiliary mounting bracket;

[0024] Parts and component numbers in the diagram:

[0025] 100-Balancing lifting device, 110-Covering structure, 111-Covering inner cavity, 112-First covering side plate, 113-Second covering side plate, 114-Bottom plate, 115-Observation window, 121-First lifting lug, 122-Second lifting lug, 123-Mounting hole;

[0026] 200 - blade, 210 - bottom corner;

[0027] 300 - Lifting head, 310 - Lifting rope;

[0028] 400-Auxiliary hanger, 410-Hanger body, 411-Hanging hole, 412-First fastening arm, 413-First fastening hole, 414-Second fastening arm, 415-Second fastening hole, 416-First fastening bolt, 417-Fastening nut, 418-Anti-detachment component, 419-Third fastening hole, 420-Second fastening bolt;

[0029] 510-Balance sling, 520-Force gauge, 530-Balance hoist. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0031] Example 1

[0032] Please see Figure 1This utility model provides an anti-tipping mechanism for blade hoisting. In the manufacturing and maintenance of large rotating equipment such as water turbines and steam turbines, the hoisting of blades 200 is a crucial step. Because these blades 200 are typically designed with asymmetrical aerodynamic structures, their center of gravity is often not located at the geometric center, making them prone to tilting, overturning, or even falling during hoisting. In existing technologies, a single hoisting point or simple clamps are usually used for hoisting, but this method is difficult to adapt to the dynamic changes in the center of gravity distribution of different blades 200. Especially in situations with limited space or requiring precision assembly, the instability of this hoisting method is particularly evident, posing a threat to operational safety and significantly reducing operational efficiency.

[0033] Therefore, in this context, the present invention proposes an anti-overturning mechanism for blade hoisting, aiming to solve the problem of insufficient hoisting stability in the prior art. This mechanism ensures that the blade 200 remains stable during hoisting, effectively preventing dangerous situations such as tilting and overturning.

[0034] Please see Figure 2 and Figure 3 In this embodiment, the anti-overturning mechanism for blade hoisting includes a balancing lifting device, which includes a covering structure 110 and a hoisting connection part. The covering structure 110 is used to cover the corner of the bottom edge 210 of the blade 200; the hoisting connection part is located on both sides outside the covering structure covering the corner of the blade 200 and is used to connect with the hoisting rope 310; wherein, the covering structure has a covering inner cavity 111, and the inner contour of the covering inner cavity 111 is adapted to the shape of the bottom edge 210 of the blade 200; wherein, all the balancing lifting devices are connected to the hoisting connection part through the hoisting rope 310 and converge to the hoisting head 300; wherein, when the blade 200 is hoisted, at least one pair of the balancing lifting devices is used to cover the blade 200 to achieve hoisting center of gravity offset compensation.

[0035] Please see Figure 1In use, the corners of the blade 200 are placed within the covering structure 110 of a pair of balancing spreaders, so that the bottom corners 210 of the blade 200 are tightly wrapped by the inner cavity 111. Since the inner contour of the inner cavity 111 matches the shape of the bottom corners 210 of the blade 200, it ensures that the blade 200 will not detach from the balancing spreaders due to swaying during hoisting. Next, the hoisting connection is connected to the hoisting head 300 via hoisting ropes 310. Since the hoisting connection is located on both sides outside the covering structure of the blade 200 corners, it ensures that the hoisting ropes 310 are evenly stressed during hoisting, preventing the blade 200 from tilting or overturning. Furthermore, since at least one pair of balancing spreaders is provided on both sides of the blade 200 to cover it, hoisting center of gravity offset compensation can be achieved, ensuring that the blade 200 remains stable during hoisting. This anti-tilting mechanism for 200mm blade hoisting not only improves operational safety but also greatly enhances operational efficiency, making it particularly suitable for situations with limited space or requiring precision assembly.

[0036] Further, please see Figure 2 The covering structure 110 includes a first covering side plate 112 and a second covering side plate 113. One side of the first covering side plate 112 and the second covering side plate 113 are smoothly connected by an arc surface, and the other side is fixedly connected by a receiving base plate 114. The first covering side plate 112 and the second covering side plate 113 are used to tightly fit the two sides and corners of the blade 200, ensuring that the blade 200 will not slip or shake during hoisting. The design of the smooth arc surface transition connection allows the corners of the blade 200 to slide smoothly into the covering structure 110, while reducing friction and resistance, protecting the blade 200 from damage. The setting of the receiving base plate 114 further enhances the stability and load-bearing capacity of the covering structure 110, making the entire hoisting process safer and more reliable. In addition, the first covering side plate 112 and the second covering side plate 113 can also be customized according to the specific size and shape of the blade 200 to adapt to the hoisting requirements of different specifications and types of blades 200.

[0037] Furthermore, the lifting connection includes a first lifting lug 121 and a second lifting lug 122; the first lifting lug 121 and the second lifting lug 122 are respectively fixedly disposed on the outer side of the first covering side plate 112 and the second covering side plate 113. The first lifting lug 121 and the second lifting lug 122 are respectively provided with mounting holes 123 for installing auxiliary hangers 400. The first lifting lug 121 and the second lifting lug 122 are used to securely connect the lifting rope 310 or the lifting chain to the anti-overturning mechanism, thereby achieving stable lifting of the blade 200. The design of the mounting holes 123 allows the lifting connection to easily connect various standard lifting auxiliary hangers 400, such as lifting rings and hooks, further improving the flexibility and convenience of lifting. At the same time, the positions and angles of the first lifting lug 121 and the second lifting lug 122 have been carefully calculated and designed to ensure uniform force distribution during the lifting process, avoiding deformation or damage to the blade 200 due to improper lifting. This design not only improves the efficiency of hoisting but also ensures the safety of the hoisting process.

[0038] Further, please see Figure 3 and Figure 4 The auxiliary hanger 400 includes a hanger body 410, a first fastening bolt 416, and a fastening nut 417; the hanger body 410 is arranged in a ring shape with a hanging hole 411 in the center area; the two ends of the hanger body 410 are provided with a first fastening arm 412 and a second fastening arm 414; the first fastening arm 412 and the second fastening arm 414 are respectively provided with a first fastening hole 413 and a second fastening hole 415.

[0039] Furthermore, the bolt is set through the first fastening hole 413, the mounting hole 123 and the second fastening hole 415, and the auxiliary hanger 400 is set on the first lifting lug 121 and the second lifting lug 122 by fastening the nut.

[0040] In use, the lifting rope 310 or lifting chain is threaded through the hanging hole 411 to achieve a secure connection with the lifting connection. This auxiliary hanger 400 design makes lifting operations simpler and faster. The first fastening arm 412 and the second fastening arm 414, along with the corresponding first fastening hole 413 and the second fastening hole 415, provide stable support for the bolts to pass through, ensuring a firm connection between the hanger body 410 and the lifting lug. The fastening nut 417 further increases the stability of the connection, preventing accidents caused by loosening during lifting. In use, operators simply need to thread the lifting rope 310 or lifting chain through the hanging hole 411 and adjust it to the appropriate length and angle to begin lifting operations, greatly improving work efficiency and safety.

[0041] Furthermore, one end of the bolt is also provided with an anti-detachment component 418. After the bolt is installed with the nut, the unfoldable anti-detachment component 418 prevents the auxiliary hanger 400 from detaching from the first lifting lug 121 and the second lifting lug 122. This anti-detachment component 418 can be a spring clip, a foldable metal sheet, or a foldable metal strip. After the bolt passes through the first fastening hole 413, the mounting hole 123, and the second fastening hole 415 and is tightened with the nut, the operator can unfold the anti-detachment component 418 to lock it onto the nut or a certain part of the hanger body 410, forming an effective anti-detachment structure. In this way, even if strong vibrations or impacts are encountered during the hoisting process, the anti-detachment component 418 can effectively prevent the auxiliary hanger 400 from accidentally detaching from the first lifting lug 121 and the second lifting lug 122, further improving the safety and stability of the hoisting operation.

[0042] Even during high-intensity lifting operations, the bolts and nuts will not accidentally loosen due to excessive force. The anti-slip component 418 is ingeniously and practically designed; after the bolts and nuts are installed, a simple unfolding action effectively prevents the auxiliary hanger 400 from slipping off the first lifting lug 121 and the second lifting lug 122. This eliminates the need for operators to frequently check the stability of the connection during use, further enhancing the safety and continuity of the operation. When using it, simply ensure that the anti-slip component 418 is correctly installed and unfolded, and lifting operations can be carried out with confidence, without worrying about any safety hazards caused by connection problems.

[0043] Furthermore, an observation window 115 is provided at the smooth arc transition between the first covering side plate 112 and the second covering side plate 113, and the observation window 115 is in communication with the inner cavity of the covering.

[0044] The design of the observation window 115 allows the operator to directly observe the interior of the enclosed cavity without disassembling the entire auxiliary hanger 400. This design greatly improves the convenience and efficiency of operation, especially when checking the connection between the enclosed cavity 111 inside the balancing hanger 100 and the bottom corner 210 of the blade 200. The observation window 115 is open and connected to the enclosed cavity 111, allowing the operator to clearly observe the internal situation and determine whether the connection or installation is secure.

[0045] Preferably, the first covering side plate 112 and / or the second covering side plate 113 are further provided with a third fastening hole 419, and the second fastening bolt 420 is installed in the third fastening hole 419 to abut against the blade 200, and the balance hoist 100 is fastened to the bottom corner 210 of the blade 200.

[0046] Since the balancing device 100 has not yet been lifted when it is first installed with the blade 200, the clamping force between the balancing device 100 and the blade 200 is insufficient. Therefore, by installing a second fastening bolt 420 in the third fastening hole 419, the connection stability between the balancing device 100 and the blade 200 can be further enhanced. This design not only improves safety during installation but also ensures smooth lifting operations. The second fastening bolt 420 abuts against the blade 200 through the third fastening hole 419, forming an additional fixing point, making it less likely for the balancing device 100 to shake or fall off during lifting. At the same time, this fastening method also facilitates adjustment and correction by operators during installation, ensuring accurate positional relationship between the balancing device 100 and the blade 200. In this way, operators can perform lifting operations with greater confidence, improving overall work efficiency and safety.

[0047] Furthermore, during the hoisting of the blade 200, at least one pair of balancing slings 510 are provided between the hoisting head 300 and the balancing hoist 100 to monitor the hoisting tension on both sides of the blade 200; the balancing slings 510 are also equipped with a force gauge 520 and a balancing hoist 530. During the hoisting operation, various factors may cause an imbalance in the forces on both sides of the hoist. To ensure the safety and stability of the hoisting operation, it is particularly important to accurately measure and monitor the tension on both sides using the force gauge 520. When a difference in tension is detected on both sides, the operator needs to take timely measures to adjust it. By using the balancing hoist 530, the tension of the slings can be effectively adjusted to achieve a balance of forces on both sides. This adjustment process requires the operator to have certain professional skills and experience to ensure the accuracy of the adjustment and the smooth progress of the hoisting operation.

[0048] Furthermore, the force gauge 520 adopts a 5-ton wireless force gauge SGLD-5.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A roll-over prevention mechanism for hoisting a blade, characterized in that The balanced lifting hanger (100) comprises: a covering structure (110) for covering the corner of the blade bottom corner (210); a lifting connection part provided on both sides of the covering structure (110) outside the blade corner for connecting with a lifting rope (310); wherein the covering structure (110) is provided with a covering inner cavity (111), and the inner contour of the covering inner cavity (111) is matched with the shape of the blade (200) bottom corner; wherein all the balanced lifting hangers (100) are connected with the lifting connection part through the lifting rope (310) and converge to a lifting head (300); wherein the blade (200) is lifted by at least one pair of the balanced lifting hangers (100) to cover the blade (200) to realize lifting center of gravity offset compensation.

2. The anti-inversion mechanism for hoisting a paddle according to claim 1, characterized in that The covering structure (110) comprises a first covering side plate (112) and a second covering side plate (113); one side of the first covering side plate (112) and the second covering side plate (113) is connected in arc surface smooth transition, and the other side is fixedly connected through a receiving bottom plate (114).

3. The roll-over prevention mechanism for a blade hoist according to claim 2, wherein The lifting connection part comprises a first lifting lug (121) and a second lifting lug (122); the first lifting lug (121) and the second lifting lug (122) are respectively fixedly arranged on the outer side of the first covering side plate (112) and the second covering side plate (113).

4. The anti-inversion mechanism for hoisting a blade as claimed in claim 3, wherein mounting holes (123) are respectively arranged on the first lifting lug (121) and the second lifting lug (122) for mounting an auxiliary hanger (400).

5. A roll-over prevention mechanism for a blade hoist according to claim 4, wherein The auxiliary hanger (400) comprises a hanger main body (410), a first fastening bolt (416) and a fastening nut (417); the hanger main body (410) is arranged in a ring shape and a hanging hole (411) is arranged in the center region; first fastening arms (412) and second fastening arms (414) are arranged at both ends of the hanger main body (410); first fastening holes (413) and second fastening holes (415) are respectively arranged on the first fastening arms (412) and the second fastening arms (414).

6. A roll-over prevention mechanism for a blade hoist according to claim 5, wherein The first fastening bolt (416) is arranged through the first fastening hole (413), the mounting hole (123) and the second fastening hole (415), and the auxiliary hanger (400) is arranged on the first lifting lug (121) and the second lifting lug (122) by fastening the fastening nut (417).

7. The roll-over prevention mechanism for hoisting a blade according to claim 5, wherein One end of the first fastening bolt (416) is further provided with an anti-falling piece (418), and the first fastening bolt (416) and the fastening nut (417) are arranged by unfolding the anti-falling piece (418) after installation to prevent the auxiliary hanger (400) from falling off the first lifting lug (121) and the second lifting lug (122).

8. The roll-over prevention mechanism for a blade hoist as set forth in claim 2, wherein An observation window is arranged at the arc surface smooth transition of the first covering side plate (112) and the second covering side plate (113), and the observation window (115) is in communication with the covering inner cavity (111).

9. The roll-over prevention mechanism for a blade hoist as set forth in claim 2, wherein A third fastening hole (419) is further arranged on the first cladding side plate (112) and / or the second cladding side plate (113), and a second fastening bolt (420) is arranged on the third fastening hole (419) to abut against the paddle (200) and fasten the balance lifting tool (100) to the paddle (200).

10. The roll-over prevention mechanism for a blade hoist as set forth in claim 2, wherein At least a pair of balance lifting ropes (510) are further arranged between the lifting head (300) and the balance lifting tool (100) to monitor the lifting tension on both sides of the paddle (200) during lifting of the paddle (200). A force gauge (520) and a balance hoist (530) are further arranged on the balance lifting rope (510).

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