A small angle hoisting device of a crane

Abstract

The application discloses a small-angle hoisting device of a crane, relates to the technical field of bridge demolition, and comprises a truss connected with a rope of a hoisting arm of the crane, a hoisting assembly connected with a bent cap baffle is arranged below the truss, the hoisting assembly comprises a fixing rod inserted into a through hole of the bent cap baffle, hoisting ropes are arranged at both ends of the fixing rod, a moving frame is slidably arranged at the bottom of the truss, the truss is provided with a driving element one for driving the moving frame to move in a small range, a rotating seat connected with the hoisting ropes is rotatably arranged at the bottom of the moving frame, and the moving frame is provided with a driving element two for driving the rotating seat to rotate. The fixing rod is inserted into the through hole of the bent cap baffle to form reliable connection, the sliding adjustment of the moving frame is matched with the angle adjustment of the rotating seat, the driving element one and the driving element two respectively realize small-range translation and rotation adjustment, the hoisting angle and position of the bent cap baffle can be controlled in a narrow space during bridge demolition, and collision with facilities such as a bridge pier is prevented.

Description

Technical Field

[0001] This application relates to the field of bridge demolition technology, and in particular to a crane small-angle lifting device. Background Technology

[0002] In bridge reconstruction, expansion, or demolition projects, the cap beam baffle on the pier cap beam is a crucial limiting component ensuring the stability of the main bridge structure. When the entire bridge structure needs to be removed, it must first be lifted and transported using a transplanting machine. However, the lifting height of the transplanting machine is limited by its own structure and cannot exceed the height of the cap beam baffle. Therefore, the cap beam baffle must first be separated from the cap beam and hoisted away to make room for the lifting operation of the main bridge structure. The removal of the cap beam baffle is usually carried out on existing roads or in complex construction environments. The working space is limited by factors such as bridge piers, surrounding buildings, and underground pipelines, requiring extremely high flexibility and precision from the hoisting equipment.

[0003] Currently, the hoisting and dismantling of cap beam baffles are mostly achieved by using cranes in conjunction with truss structures. The truss is connected to the crane boom to form the main hoisting body, and hoisting ropes are installed below the truss to connect with the cap beam baffles, thereby enabling the hoisting of the cap beam baffles.

[0004] Regarding the aforementioned technologies, the inventors believe that the connection position between the truss and the hoisting components is relatively fixed, or can only achieve rough position adjustment. It is difficult to achieve small-amplitude translation and angle rotation adjustment of the cap beam baffle in a narrow working space, and it is difficult to avoid obstacles such as surrounding piers and facilities, which can easily lead to collisions that cause component damage or safety accidents. Utility Model Content

[0005] The purpose of this application is to provide a crane small-angle lifting device to improve the problem that the connection position between the truss and the lifting component is relatively fixed, or can only achieve rough position adjustment, making it difficult to achieve small-amplitude translation and angle rotation adjustment of the cap beam baffle in a narrow working space, making it difficult to avoid obstacles such as surrounding piers and facilities, and easily causing collisions that lead to component damage or safety accidents.

[0006] This application provides a crane lifting device at a small angle, which adopts the following technical solution:

[0007] A small-angle lifting device for a crane includes a truss connected to a rope of the crane boom. A lifting assembly connected to a cap beam baffle is disposed below the truss. The lifting assembly includes a fixing rod inserted into a through hole in the cap beam baffle. Lifting ropes are disposed at both ends of the fixing rod. A movable frame is slidably disposed at the bottom of the truss. The truss is provided with a first driving component for small-amplitude movement of the movable frame. A rotating seat connected to the lifting ropes is rotatably disposed at the bottom of the movable frame. A second driving component is provided on the movable frame for rotating the rotating seat.

[0008] By adopting the above technical solution, the hoisting components form a reliable connection by inserting the fixed rod into the through hole of the cap beam baffle. With the sliding adjustment of the moving frame and the angle adjustment of the rotating seat, the first drive component and the second drive component can respectively achieve small-amplitude translation and rotation adjustment. This enables precise control of the hoisting angle and position of the cap beam baffle in the narrow space of bridge demolition, avoiding collisions with bridge piers and other facilities, and solving the problem of inflexible traditional hoisting angle adjustment.

[0009] Optionally, one end of the fixing rod is provided with a fixing plate that abuts against the side wall of the cover beam baffle, and the other end of the fixing rod is provided with an mounting plate that contacts the side wall of the cover beam baffle. The mounting plate and the fixing rod are detachably connected, and a fixing nut that abuts against the mounting plate is threaded into the fixing rod.

[0010] By adopting the above technical solution, the fixing plate and the mounting plate clamp and fix the cover beam baffle from both sides. Combined with the threaded locking structure of the fixing nut, the fixing rod and the cover beam baffle form a rigid connection, which effectively prevents relative displacement between the fixing rod and the cover beam baffle during hoisting, enhances the connection stability, avoids the risk of the cover beam baffle falling off due to loosening, and is also compatible with cover beam baffles of different thicknesses, improving the versatility of the device.

[0011] Optionally, the end of the suspending rope is provided with a lasso portion that connects to both ends of the fixed rod, and both ends of the fixed rod are threadedly connected with limiting blocks that abut against the side wall of the lasso portion, the size of the limiting blocks being larger than the overall size of the lasso portion.

[0012] By adopting the above technical solution, the sling section enables a quick connection between the lifting rope and the fixed rod. The limiting block forms an axial limit on the sling section through a threaded connection. Utilizing the size feature of the limiting block being larger than that of the sling section, the lifting rope is prevented from sliding axially along the fixed rod during the lifting process, ensuring the stability of the lifting rope's stress point and avoiding the tilting of the cap beam baffle caused by the displacement of the lifting rope's position, thereby further improving the structural stability of the lifting process.

[0013] Optionally, the beam below the truss is provided with a temporary support frame to restrict the rotation of the truss, and the end of the truss is provided with a connecting groove that connects to the temporary support frame.

[0014] By adopting the above technical solution, the temporary support frame and the connecting groove at the end of the truss cooperate to form lateral support for the truss, restricting the rotational freedom of the truss during hoisting operations. Especially during small-angle adjustments and the moment of lifting, it can counteract the torque brought by the cap beam baffle, prevent the truss from swaying or shaking, enhance the overall structure's anti-overturning ability, and improve the stability of the operation process.

[0015] Optionally, a positioning camera electrically connected to the drive unit is provided at the bottom of the mobile frame, and the positioning camera takes pictures to locate the position of the cover beam baffle.

[0016] By adopting the above technical solution, the positioning camera takes real-time pictures of the position of the cap beam baffle and transmits the position information to the second drive component to realize the automatic angle adjustment of the rotating seat. This reduces the error of manual visual positioning and makes the angle adjustment more accurate. It is especially suitable for narrow working spaces with obstructed vision, improves the angle adjustment efficiency and hoisting accuracy, and shortens the operation time.

[0017] Optionally, a counterweight block that moves in the opposite direction to the moving frame is provided above the truss, and the truss is provided with a driving component three for driving the counterweight block to move.

[0018] By adopting the above technical solution and using the three-adjustable counterweight of the drive component, the center of gravity of the device can be adjusted in real time according to the weight of the cap beam baffle and the hoisting angle, which can counteract the eccentric moment generated by the hoisting components, prevent the truss from tilting due to unbalanced forces, ensure the overall stability of the crane during hoisting, and expand the weight range of cap beam baffles that the device can hoist.

[0019] Optionally, a clamping frame corresponding to the side wall of the counterweight is slidably arranged above the truss, a lifting ring is provided on the top of the counterweight for easy hoisting, an insertion rod is provided on the clamping frame facing the counterweight, and a slot corresponding to the insertion rod is opened at the bottom of the counterweight.

[0020] By adopting the above technical solution, the clamping frame provides lateral fixation for the counterweight, the cooperation between the insert rod and the slot restricts the vertical displacement of the counterweight, the lifting ring facilitates the installation and replacement of the counterweight, and the overall structure ensures that the counterweight will not shift or fall off during movement and hoisting.

[0021] Optionally, the side wall of the clamping frame is provided with a locking rod that is connected to the lifting ring.

[0022] By adopting the above technical solution, the connection between the locking rod and the lifting ring forms a double lock on the basis of the fixed clamping frame, which further restricts the displacement of the counterweight and prevents the counterweight from separating from the clamping frame.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The fixed rod is inserted into the through hole of the cap beam baffle to form a reliable connection. With the sliding adjustment of the moving frame and the angle adjustment of the rotating seat, the first drive component and the second drive component respectively realize small-amplitude translation and rotation adjustment. It can control the hoisting angle and position of the cap beam baffle in the narrow space of bridge demolition and prevent collision with bridge piers and other facilities.

[0025] 2. The sling section enables quick connection between the lifting rope and the fixed rod. The limiting block forms an axial limit on the sling section through a threaded connection. Utilizing the larger size of the limiting block than the sling section, it prevents the lifting rope from slipping axially along the fixed rod during the lifting process, ensuring the stability of the lifting rope's stress point and avoiding the tilting of the cap beam baffle due to the displacement of the lifting rope's position, thus further improving the structural stability of the lifting process.

[0026] 3. The temporary support frame and the connecting groove at the end of the truss form lateral support for the truss, restricting the rotational freedom of the truss during hoisting operations. Especially during small-angle adjustments and the moment of lifting, it can counteract the torque brought by the cap beam baffle, prevent the truss from swaying or shaking, enhance the overall structure's anti-overturning ability, and improve the stability of the operation process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a small-angle lifting device for a crane.

[0028] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0029] Figure 3 This is a partial schematic diagram of a crane's small-angle lifting device.

[0030] In the diagram, 1. Truss; 11. Connecting slot; 12. Counterweight; 121. Lifting ring; 122. Slot; 13. Drive component three; 14. Clamping frame; 141. Insert rod; 142. Locking rod; 2. Lifting assembly; 21. Fixing rod; 22. Lifting rope; 221. Sling; 23. Fixing plate; 24. Mounting plate; 25. Fixing nut; 26. Limiting block; 3. Cover beam baffle; 4. Moving frame; 41. Drive component one; 42. Positioning camera; 5. Rotating seat; 51. Drive component two; 6. Temporary support frame. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0032] A crane lifting device with a small angle, as shown in the reference Figure 1 , Figure 2 and Figure 3The system includes a truss 1, with ropes connecting the upper part of the truss 1 to the crane boom. A hoisting assembly 2 for connecting the cap beam baffle 3 is provided below the truss 1. The hoisting assembly 2 includes a fixing rod 21, which can be inserted into a pre-set through hole in the cap beam baffle 3. A fixing plate 23 is welded to one end of the fixing rod 21. The fixing plate 23 abuts against one side of the cap beam baffle 3 as the fixing rod 21 is inserted. An mounting plate 24 is provided at the other end of the fixing rod 21. The mounting plate 24 has holes corresponding to the fixing rod 21. A fixing nut 25 threaded on the fixing rod 21 abuts against the mounting plate 24, so that the fixing plate 23 and the mounting plate 24 clamp the cap beam baffle 3 from both sides.

[0033] Reference Figure 2 and Figure 3 The fixed rod 21 is connected to two ends of a lifting rope 22. The ends of the lifting rope 22 are provided with a lasso 221, which is fitted onto both ends of the fixed rod 21. The fixed rod 21 is also threaded with limit blocks 26 at both ends. The size of the limit blocks 26 is larger than the overall size of the lasso 221 to limit the axial movement of the lasso 221 along the fixed rod 21. A movable frame 4 is slidably installed at the bottom of the truss 1. A drive component 41 is provided on the truss 1. The drive component 41 is a linear motor module electrically connected to a power source. The drive component 41 can drive the movable frame 4 to slide slightly along the length of the truss 1. A rotating seat 5 is rotatably installed at the bottom of the movable frame 4. The end of the lifting rope 22 away from the fixed rod 21 is connected to the rotating seat 5. A drive component 51 is provided on the movable frame 4. The drive component 51 is a servo motor electrically connected to a power source. The drive component 51 is used to drive the rotating seat 5 to rotate to adjust the lifting angle.

[0034] Reference Figure 1 and Figure 3 A temporary support frame 6 is bolted to the beam below the truss 1. A connecting groove 11 adapted to the temporary support frame 6 is opened at the end of the truss 1. The temporary support frame 6 abuts against the truss 1 through the connecting groove 11 to restrict the rotation of the truss 1. A positioning camera 42 is installed at the bottom of the moving frame 4. The positioning camera 42 is electrically connected to the second drive component 51 and can take pictures to locate the position of the cover beam baffle 3, providing a basis for the angle adjustment of the second drive component 51.

[0035] Reference Figure 1 and Figure 3A counterweight 12 is mounted on top of the truss 1. The counterweight 12 can move in the opposite direction to the moving frame 4. A drive unit 3 13 is mounted on the truss 1. The drive unit 3 13 is also a linear motor module electrically connected to the power supply. The drive unit 3 13 is used to drive the counterweight 12 to move and adjust the center of gravity of the device. A clamping frame 14 is slidably mounted on top of the truss 1. The clamping frame 14 corresponds to the side wall of the counterweight 12. The top of the counterweight 12 is provided with a lifting ring 121 for easy hoisting. The side of the clamping frame 14 facing the counterweight 12 is provided with a rod 141. The bottom of the counterweight 12 is provided with a slot 122 corresponding to the rod 141. Inserting the rod 141 into the slot 122 can limit the vertical displacement of the counterweight 12. A locking rod 142 is inserted into the side wall of the clamping frame 14. The locking rod 142 can be connected to the lifting ring 121 to form a double fixation for the counterweight 12.

[0036] The implementation principle of this application embodiment is as follows:

[0037] When the crane's small-angle lifting device is in operation, first insert the fixing rod 21 into the through hole of the cover beam baffle 3, so that the fixing plate 23 abuts against one side of the cover beam baffle 3. Then, put the mounting plate 24 through the mounting hole onto the other end of the fixing rod 21, and tighten the fixing nut 25 so that the mounting plate 24 abuts against the other side of the cover beam baffle 3, thereby achieving a rigid connection between the fixing rod 21 and the cover beam baffle 3. Subsequently, the sling part 221 of the lifting rope 22 is fitted onto both ends of the fixed rod 21, and the limiting block 26 is tightened to prevent the sling part 221 from slipping. The other end of the lifting rope 22 is connected to the rotating seat 5 at the bottom of the moving frame 4. The positioning camera 42 takes pictures of the position of the cap beam baffle 3 and transmits the signal to the second drive component 51. The second drive component 51 drives the rotating seat 5 to rotate, initially adjusting the lifting angle. At the same time, the first drive component 41 drives the moving frame 4 to slide along the truss 1, realizing a small-amplitude translation adjustment, so that the cap beam baffle 3 is in the optimal lifting position. During the lifting process, the third drive component 13 drives the counterweight block 12 to move in the opposite direction to the moving frame 4 according to the weight of the cap beam baffle 3 and the lifting angle, adjusting the center of gravity of the device to ensure the force balance of the truss 1. When the cap beam baffle 3 is adjusted to the appropriate angle and position, the crane lifting rope 22 is tightened, lifting the cap beam baffle 3 off the cap beam, and finally transferring the cap beam baffle 3 to the designated position to complete the lifting and dismantling operation. Through the coordinated action of drive component 41 and drive component 51, the movement trajectory of the cap beam baffle 3 is precisely controlled in a confined space to prevent collisions with bridge piers and other facilities.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A crane lifting device at a small angle, characterized in that: The system includes a truss (1) connected to the ropes of the crane boom, and a hoisting assembly (2) connected to the cap beam baffle (3) is provided below the truss (1). The hoisting assembly (2) includes a fixing rod (21) inserted into the through hole of the cap beam baffle (3). The fixing rod (21) is provided with hoisting ropes (22) at both ends. A movable frame (4) is slidably provided at the bottom of the truss (1). The truss (1) is provided with a first driving component (41) for driving the movable frame (4) to move slightly. A rotating seat (5) connected to the hoisting rope (22) is rotatably provided at the bottom of the movable frame (4). The movable frame (4) is provided with a second driving component (51) for driving the rotating seat (5) to rotate.

2. The crane small-angle lifting device according to claim 1, characterized in that: One end of the fixing rod (21) is provided with a fixing plate (23) that abuts against the side wall of the cover beam baffle (3), and the other end of the fixing rod (21) is provided with an mounting plate (24) that contacts the side wall of the cover beam baffle (3). The mounting plate (24) is detachably connected to the fixing rod (21), and a fixing nut (25) that abuts against the mounting plate (24) is threaded into the fixing rod (21).

3. The crane small-angle lifting device according to claim 2, characterized in that: The end of the suspension rope (22) is provided with a lasso part (221) that is connected to both ends of the fixed rod (21). Both ends of the fixed rod (21) are threadedly connected with limiting blocks (26) that abut against the side wall of the lasso part (221). The size of the limiting block (26) is larger than the overall size of the lasso part (221).

4. A small-angle lifting device for a crane according to claim 3, characterized in that: The beam below the truss (1) is provided with a temporary support frame (6) to restrict the rotation of the truss (1), and the end of the truss (1) is provided with a connecting groove (11) that connects to the temporary support frame (6).

5. A crane small-angle lifting device according to claim 4, characterized in that: The bottom of the mobile frame (4) is equipped with a positioning camera (42) that is electrically connected to the second drive component (51). The positioning camera (42) takes pictures of the position of the cover beam baffle (3) for positioning.

6. A small-angle lifting device for a crane according to claim 5, characterized in that: A counterweight (12) is provided above the truss (1) and moves in the opposite direction to the movable frame (4). The truss (1) is provided with a driving component (13) for driving the counterweight (12) to move.

7. A crane small-angle lifting device according to claim 6, characterized in that: A clamping frame (14) corresponding to the side wall of the counterweight (12) is slidably arranged above the truss (1). A lifting ring (121) is provided on the top of the counterweight (12) for easy hoisting. A plug rod (141) is provided on the clamping frame (14) facing the counterweight (12). A slot (122) corresponding to the plug rod (141) is opened at the bottom of the counterweight (12).

8. A small-angle lifting device for a crane according to claim 7, characterized in that: The clamping frame (14) has a locking rod (142) inserted into its side wall, which is connected to the lifting ring (121).

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