A special lifting tool with adjustable deformation

Abstract

This utility model relates to the field of heavy equipment hoisting and marine engineering equipment technology, and particularly to a special lifting device with adjustable deformation, including a main beam assembly, a deformation adjustment mechanism, a controller, and lifting frames. The main beam assembly has multiple top lifting lugs, which are connected to the crane's main hook via upper lifting cables. The deformation adjustment mechanism includes a first hydraulic cylinder and a displacement sensor. The first hydraulic cylinder is positioned between the upper lifting cable and the top lifting lugs, with its fixed end connected to the upper lifting cable. The displacement sensor, used to monitor the extension and retraction length of the first hydraulic cylinder's output end in real time, is built into the first hydraulic cylinder. The controller is connected to the deformation adjustment mechanism. Multiple lifting frames are mounted on the main beam assembly and connected to the lifted component via lower lifting cables. Through active deformation control, the impact of main beam deflection on hoisting accuracy is greatly reduced, stress concentration and uneven load caused by deflection deformation are avoided, potential overload risks are eliminated, and the structure of the lifted object is protected from damage.

Description

Technical Field

[0001] This utility model relates to the field of heavy equipment hoisting and marine engineering equipment technology, and more specifically, to a special hoisting tool with adjustable deformation. Background Technology

[0002] In large-scale infrastructure construction, shipbuilding, and offshore platform installation, it is often necessary to lift long, heavy objects such as large steel components, precast concrete beams, large pipes, or modules. These objects are typically heavy, long, rigid, and susceptible to damage due to uneven stress.

[0003] Currently, commonly used traditional lifting devices, such as fixed lifting beams or spreader beams, are mostly rigid structures. During the lifting process, due to the weight of the load, the main beam of the lifting device will inevitably undergo deflection deformation. This deformation is passive and uncontrollable, leading to a series of problems: 1. Low hoisting accuracy: The deflection of the main beam causes changes in the position of the hoisting points, making it difficult to achieve precise alignment between the hoisted object and the target installation position; 2. Damage to the suspended object: Uneven deformation of the main beam will be transmitted to the suspended object through the slings, causing it to bear additional bending moment or torque, which may lead to internal cracks or structural damage, especially dangerous for components such as prestressed concrete beams.

[0004] 3. High safety risks: Deflection deformation leads to uneven stress on the main beam, which may cause local stress concentration, posing an overload risk and threatening operational safety.

[0005] Therefore, there is an urgent need for a special lifting tool that can adjust deformation and control stress state to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model aims to overcome the problem that the main beam of existing lifting devices will inevitably deflect and deform during the lifting process due to the influence of the weight of the lifted object. It provides a special lifting device with adjustable deformation that can adjust the deformation and control the stress state.

[0007] The objective of this utility model is achieved through the following technical solution: An adjustable and deformable lifting device includes a main beam assembly, a deformation adjustment mechanism, a controller, and lifting frames. The main beam assembly has multiple top lifting lugs, which are connected to the crane's main hook via upper lifting cables. The deformation adjustment mechanism includes a first hydraulic cylinder and a displacement sensor. The first hydraulic cylinder is positioned between the upper lifting cable and the top lifting lugs, with its fixed end connected to the upper lifting cable. The displacement sensor, used to monitor the extension and retraction length of the first hydraulic cylinder's output end in real time, is internally located within the first hydraulic cylinder. The controller is connected to the deformation adjustment mechanism. Multiple lifting frames are mounted on the main beam assembly and connected to the lifted component via lower lifting cables.

[0008] Furthermore, the output shaft of the first hydraulic cylinder is connected to the top lifting lug via a load-bearing pin, and the deformation adjustment mechanism also includes a pressure sensor integrated into the load-bearing pin.

[0009] Furthermore, the main beam assembly includes a main frame and support beams, with multiple support beams arranged in parallel on the main frame. The two ends of each support beam are connected to the main frame and avoid the top lifting lugs, and the lifting frame is connected to the support beams.

[0010] Furthermore, at least one hanging frame is provided on the support beam, the hanging frame is movably sleeved on the outside of the support beam, and a hanging frame adjustment mechanism for adjusting the position of the hanging frame is provided above the support beam.

[0011] Furthermore, the lifting frame adjustment mechanism includes an adjustment block, a mounting plate, an adjustment screw, and an adjustment handle. The adjustment block is fixed to the top surface of the lifting frame, the mounting plate is fixed to both ends of the top surface of the support beam, the adjustment screw is rotatably disposed between the mounting plates and passes through the adjustment block, the adjustment screw is threadedly connected to the adjustment block, and the adjustment handle is fixed to one end of the adjustment screw.

[0012] Furthermore, when two or more of the hanging frames are provided on the support beam, the same number of adjusting screws as the number of hanging frames are installed between the mounting plates, and the adjusting blocks on the hanging frames are threadedly connected to one of the adjusting screws and slidably connected to the remaining adjusting screws.

[0013] Furthermore, the main frame has several mounting positions for installing the support beams on opposite sides. The support beams span the main frame, and both ends of the support beams can be selectively installed at the mounting positions and are detachably connected to the main frame.

[0014] Furthermore, the lifting frame includes a frame body, connecting plates, a first lifting plate, a second lifting plate, and an automatic unhooking mechanism. The connecting plates are fixed to both ends of the frame body and are sleeved on the support beam together with the frame body. The first and second lifting plates are respectively located at the bottom of the two connecting plates. The first and second lifting plates are both parallel and spaced double-plate structures. A fixed pin is provided between the first lifting plates, and a movable pin is provided between the second lifting plates. The automatic unhooking mechanism is installed on the outside of the second lifting plate and is used to drive the movable pin to perform linear reciprocating motion.

[0015] Furthermore, the automatic unhooking mechanism includes a second hydraulic cylinder and a centering camera. The second hydraulic cylinder is installed on the outside of the second hanging plate, and the output end of the second hydraulic cylinder is connected to and coaxially arranged with the movable pin. The centering camera is installed on the outside of the fixed end of the second hydraulic cylinder.

[0016] Furthermore, the automatic unhooking mechanism is connected to the controller.

[0017] Compared with the prior art, the beneficial effects of this utility model are: The adjustable deformation lifting device of this invention incorporates a displacement sensor built into the first hydraulic cylinder. This sensor monitors the real-time extension and retraction of the hydraulic rod of the first hydraulic cylinder to provide feedback on the absolute displacement or relative deformation of the main beam at various measuring points under load, thus reflecting the real-time deflection of the main beam assembly. By controlling the extension and retraction of the hydraulic rod of the first hydraulic cylinder, an arching force opposite to the deflection is applied to the main beam assembly, achieving deflection compensation. Through active deformation control, the impact of main beam deflection on lifting accuracy is greatly reduced, stress concentration and uneven load caused by deflection deformation are avoided, potential overload risks are eliminated, and the structure of the lifted object is protected from damage. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the adjustable and deformable special lifting tool of this utility model.

[0019] Figure 2 This is a side view of the adjustable and deformable special lifting device of this utility model.

[0020] Figure 3 This is a top view of the main beam assembly in the adjustable and deformable special lifting device of this utility model.

[0021] Figure 4 This is a schematic diagram of the deformation adjustment mechanism in this utility model.

[0022] Figure 5 This is a structural schematic diagram of the connecting beam, the hanging frame, and the hanging frame adjustment mechanism in this utility model.

[0023] Figure 6 This is a structural schematic diagram of the hanging frame and automatic unhooking mechanism in this utility model.

[0024] In the diagram: 1. Top lifting lug; 2. Upper lifting sling; 3. Crane main hook; 4. Deformation adjustment mechanism; 401. First hydraulic cylinder; 402. Displacement sensor; 5. Lifting frame; 501. Frame body; 502. Connecting plate; 503. First lifting plate; 504. Second lifting plate; 505. Fixed pin; 506. Movable pin; 507. Second hydraulic cylinder; 6. Lifted component; 7. Load-bearing pin; 8. Main frame; 9. Support beam; 10. Adjusting block; 11. Mounting plate; 12. Adjusting screw; 13. Adjusting handle; 14. Ring sling. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-6 As shown, the adjustable deformation special lifting device in this embodiment includes a main beam assembly, a deformation adjustment mechanism, a controller, and a lifting frame 5. Multiple top lifting lugs 1 are provided on the top of the main beam assembly, and the top lifting lugs 1 are connected to the crane's main hook 3 via upper lifting cables 2. The deformation adjustment mechanism includes a first hydraulic cylinder 401 and a displacement sensor 402. The first hydraulic cylinder 401 is located between the upper lifting cable 2 and the top lifting lugs 1, and the fixed end of the first hydraulic cylinder 401 is connected to the upper lifting cable 2. The displacement sensor 402 is built into the first hydraulic cylinder 401 and is used to monitor the extension and retraction length of the output end of the first hydraulic cylinder 401 in real time, thereby reflecting the degree of deformation of the lifting beam assembly. The controller is connected to the deformation adjustment mechanism 4, and multiple lifting frames 5 are provided on the main beam assembly and connected to the suspended component 6 via lower lifting cables.

[0027] In this embodiment, the output shaft of the first hydraulic cylinder 401 is connected to the top lifting lug 1 via the load-bearing pin 7. The deformation adjustment mechanism 4 also includes a pressure sensor integrated in the load-bearing pin 7. The pressure sensor can monitor the pressure value of the load-bearing pin 7 at each lifting point. The pressure value at each lifting point further reflects the degree of deformation and real-time deflection of the lifting beam assembly. Then, by controlling the extension and retraction of the hydraulic rod of the first hydraulic cylinder 401, an arching force opposite to the deflection is applied to the main beam assembly to achieve deflection compensation.

[0028] In this embodiment, the main beam assembly includes a main frame 8 and support beams 9. Multiple support beams 9 are arranged parallel to each other on the main frame 8. Both ends of the support beams 9 are connected to the main frame 8 and avoid the top lifting lugs 1. A lifting frame 5 is connected to the support beams 9. At least one lifting frame 5 is provided on each support beam 9. The lifting frame 5 is movably fitted onto the outside of the support beam 9. An adjustment mechanism for adjusting the position of the lifting frame 5 is provided above the support beam 9.

[0029] Specifically, the adjustment mechanism of the hanging frame 5 includes an adjustment block 10, a mounting plate 11, an adjustment screw 12, and an adjustment handle 13. The adjustment block 10 is fixed to the top surface of the hanging frame 5, the mounting plate 11 is fixed to both ends of the top surface of the support beam 9, the adjustment screw 12 is rotatably disposed between the mounting plates 11 and passes through the adjustment block 10, the adjustment screw 12 is threadedly connected to the adjustment block 10, and the adjustment handle 13 is fixed to one end of the adjustment screw 12.

[0030] When two or more lifting frames 5 are installed on the support beam 9, the same number of adjusting screws 12 as the lifting frames 5 are installed between the mounting plates 11. The adjusting blocks 10 on the lifting frames 5 are threadedly connected to one of the adjusting screws 12 and slidably connected to the remaining adjusting screws 12. By rotating the adjusting handle 13, the position of the lifting frames 5 can be adjusted to accommodate lifting components 6 of different specifications.

[0031] Preferably, the main frame 8 has several installation positions for the support beam 9 on its opposite sides. The support beam 9 spans the main frame 8, and both ends of the support beam 9 can be selectively installed at the installation positions and detachably connected to the main frame 8. Specifically, several sets of bolt holes can be provided on both sides of the main frame 8, and both ends of the support beam 9 can be detachably connected to the main frame 8 by bolts, thereby facilitating transportation and adjustment of the position of the support beam 9.

[0032] In this embodiment, the hanging frame 5 includes a frame body 501, a connecting plate 502, a first hanging plate 503, a second hanging plate 504, and an automatic unhooking mechanism. The connecting plate 502 is fixed to both ends of the frame body 501 and is sleeved on the support beam 9 together with the frame body 501. The first hanging plate 503 and the second hanging plate 504 are respectively disposed at the bottom of the two connecting plates 502. The first hanging plate 503 and the second hanging plate 504 are both parallel and spaced double plate structures. A fixed pin 505 is provided between the first hanging plates 503. The second hanging plate 504 has a hanging hole and a movable pin 506. The automatic unhooking mechanism is installed on the outside of the second hanging plate 504 and is used to drive the movable pin 506 to perform linear reciprocating motion.

[0033] The automatic unhooking mechanism includes a second hydraulic cylinder 507 and a centering camera. The second hydraulic cylinder 507 is installed on the outside of the second lifting plate 504, and its output end is connected to and coaxially arranged with the movable pin 506. The centering camera is installed on the outside of the fixed end of the second hydraulic cylinder 507. The centering camera is used to monitor whether the movable pin 506 is aligned and inserted into the lifting hole of the second lifting plate 504. Both the second hydraulic cylinder 507 and the centering camera are connected to a controller. The fixed pin 505 and the movable pin 506 are connected to the suspended component 6 through a ring sling 14. The controller controls the retraction of the second hydraulic cylinder 507, thereby achieving automatic unhooking.

[0034] The working principle of the adjustable and deformable special lifting tool in this embodiment is as follows: The displacement sensor 402 monitors the extension and retraction distance of the hydraulic rod of the first hydraulic cylinder 401 in real time to provide feedback on the absolute displacement or relative deformation of the main beam at each measuring point under load. The pressure sensor monitors the pressure value on the load-bearing pin 7 at each lifting point, thus reflecting the degree of deformation and real-time deflection of the main beam assembly. By controlling the extension and retraction of the hydraulic rod of the first hydraulic cylinder 401, an arching force opposite to the deflection is applied to the main beam assembly until the values ​​measured by the displacement sensor 402 and pressure sensor at each lifting point are the same or within an acceptable range, achieving deflection compensation. Through active deformation control, the impact of main beam deflection on lifting accuracy is greatly reduced, stress concentration and uneven load caused by deflection deformation are avoided, potential overload risks are eliminated, and the structure of the lifted object is protected from damage.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A special lifting tool with adjustable deformation, characterized in that, include: The main beam assembly has multiple top lifting lugs (1) on its top, and the top lifting lugs (1) are connected to the main hook (3) of the crane via upper lifting cables (2); The deformation adjustment mechanism (4) includes a first hydraulic cylinder (401) and a displacement sensor (402). The first hydraulic cylinder (401) is disposed between the upper sling (2) and the top lifting lug (1), and the fixed end of the first hydraulic cylinder (401) is connected to the upper sling (2). The displacement sensor (402), which is used to monitor the extension and retraction length of the output end of the first hydraulic cylinder (401) in real time, is built into the first hydraulic cylinder (401). The controller is connected to the deformation adjustment mechanism (4); as well as The lifting frames (5) are arranged on the main beam assembly and connected to the suspended component (6) by the lower slings.

2. The adjustable deformation special lifting tool according to claim 1, characterized in that, The output shaft of the first hydraulic cylinder (401) is connected to the top lifting lug (1) via a load-bearing pin (7), and the deformation adjustment mechanism (4) also includes a pressure sensor integrated in the load-bearing pin (7).

3. The adjustable deformation special lifting tool according to claim 2, characterized in that, The main beam assembly includes a main frame (8) and support beams (9). Multiple support beams (9) are arranged in parallel on the main frame (8). The two ends of the support beams (9) are connected to the main frame (8) and avoid the top lifting lugs (1). The hanging frame (5) is connected to the support beams (9).

4. The adjustable deformation special lifting tool according to claim 3, characterized in that, At least one hanging frame (5) is provided on the support beam (9), the hanging frame (5) is movably sleeved on the outside of the support beam (9), and a hanging frame (5) adjustment mechanism is provided above the support beam (9) for adjusting the position of the hanging frame (5).

5. The adjustable deformation special lifting tool according to claim 4, characterized in that, The adjustment mechanism of the hanging frame (5) includes an adjustment block (10), a mounting plate (11), an adjustment screw (12), and an adjustment handle (13). The adjustment block (10) is fixed to the top surface of the hanging frame (5), the mounting plate (11) is fixed to both ends of the top surface of the support beam (9), the adjustment screw (12) is rotatably disposed between the mounting plates (11) and passes through the adjustment block (10), the adjustment screw (12) is threadedly connected to the adjustment block (10), and the adjustment handle (13) is fixed to one end of the adjustment screw (12).

6. The adjustable deformation special lifting tool according to claim 5, characterized in that, When two or more hanging frames (5) are provided on the support beam (9), the same number of adjusting screws (12) as the hanging frames (5) are installed between the mounting plates (11). The adjusting blocks (10) on the hanging frames (5) are threadedly connected to one of the adjusting screws (12) and slidably connected to the remaining adjusting screws (12).

7. The adjustable deformation special lifting tool according to claim 6, characterized in that, The main frame (8) has several installation positions for installing the support beam (9) on its opposite sides. The support beam (9) spans the main frame (8). Both ends of the support beam (9) can be selectively installed at the installation positions and are detachably connected to the main frame (8).

8. The adjustable deformation special lifting tool according to claim 7, characterized in that, The hanging frame (5) includes a frame (501), a connecting plate (502), a first hanging plate (503), a second hanging plate (504), and an automatic unhooking mechanism. The connecting plate (502) is fixed to both ends of the frame (501) and is sleeved on the support beam (9) together with the frame (501). The first hanging plate (503) and the second hanging plate (504) are respectively located at the bottom of the two connecting plates (502). The first hanging plate (503) and the second hanging plate (504) are both parallel and spaced double plate structures. A fixed pin (505) is provided between the first hanging plates (503), and a movable pin (506) is provided between the second hanging plates (504). The automatic unhooking mechanism is installed on the outside of the second hanging plate (504) and is used to drive the movable pin (506) to make linear reciprocating motion.

9. The adjustable and deformable special lifting tool according to claim 8, characterized in that, The automatic unhooking mechanism includes a second hydraulic cylinder (507) and a centering camera. The second hydraulic cylinder (507) is installed on the outside of the second hanging plate (504), and the output end of the second hydraulic cylinder (507) is connected to the movable pin (506) and coaxially arranged. The centering camera is installed on the outside of the fixed end of the second hydraulic cylinder (507).

10. The adjustable deformation special lifting tool according to claim 9, characterized in that, The automatic unhooking mechanism is connected to the controller.

Images