Lifting device and pretreatment equipment

Abstract

The utility model relates to a lifting device which comprises a portal frame mechanism. The two hoisting mechanisms are arranged at the two ends of the portal frame mechanism respectively; the hoisting mechanism is used for hoisting a structural part, the hoisting mechanism is located below the hoisting mechanisms, and the two hoisting mechanisms are connected with the hoisting mechanism in a sliding mode so that the hoisting mechanism and the structural part can move up and down. The utility model further relates to pretreatment equipment which comprises the lifting device. According to the lifting device and the pretreatment equipment provided by the invention, secondary turn-over is not needed when the structural part is subjected to sand blasting treatment, the secondary sand blasting treatment procedure can be completed at a time, the treatment period of a single structural part is shortened, and the hoisting frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to crane manufacturing equipment field, concretely relates to a lifting device and preprocessing equipment. BACKGROUND

[0002] The installation position of the port crane is generally in the river or coastal area, and the paint quality of the metal structure surface directly affects the service life under the influence of the environment. Before the paint spraying of the large crane structure, the process flow of secondary sand blasting treatment is generally required, and the crane structure is heavy and large in size, and each surface needs to be treated by secondary sand blasting. It is more troublesome to transfer in and out of the sand blasting workshop during hoisting, and the safety requirement of hoisting is also high. When such structure is treated by secondary sand blasting process, the sequence is generally as follows: the large structure is placed on the plate trolley, the plate trolley is transported to the sand blasting pretreatment workshop together with the structure, the structure is treated by sand blasting on the front, back, left and right surfaces in the sand blasting pretreatment workshop, the structure is transported out and turned over (the bottom surface faces up), and then transported to the sand blasting pretreatment workshop for bottom surface sand blasting. This method cannot perform sand blasting process on all surfaces of the structure at one time, the bottom surface of the structure cannot be sand blasted, the structure needs to be moved out of the sand blasting workshop and then turned over, the danger during hoisting and turning over is high, the subsequent process is inconvenient, and the overall production efficiency is low. CONTENT

[0003] To solve the above technical problems, the utility model aims at providing a lifting device and preprocessing equipment, which can realize secondary turning over free during sand blasting treatment of the structure, complete the secondary sand blasting process at one time, shorten the processing period of a single structure, and reduce the hoisting frequency.

[0004] The technical scheme of the utility model is as follows:

[0005] A lifting device comprises a portal mechanism, two winch mechanisms arranged at both ends of the portal mechanism respectively, and a hoisting mechanism for hoisting a structure, wherein the hoisting mechanism is located below the winch mechanisms, and the winch mechanisms are slidably connected with the hoisting mechanism, so that the hoisting mechanism and the structure move up and down.

[0006] The hoisting mechanism comprises a beam main beam and a pulley seat arranged on the beam main beam, the winch mechanisms are symmetrically arranged along the length direction of the beam main beam, the winch mechanism comprises a pulley, a steel wire rope group and a winch assembly, the pulley is installed on the pulley seat, the steel wire rope group passes through the pulley and is connected with the winch assembly, and the winch assembly is connected with the steel wire rope group.

[0007] Two installation cavities are arranged on the pulley seat, the pulley is arranged in the installation cavity, and the two installation cavities are symmetrically arranged along the width direction of the main beam of the hoisting beam.

[0008] The hoisting mechanism comprises a hoisting beam cross beam, the hoisting beam cross beam is provided with a lifting lug, and the connecting piece is detachably connected with the structural piece through the lifting lug.

[0009] Preferably, the number of the hoisting beam cross beams is in a positive proportional relationship with the length of the structural piece, and the hoisting beam cross beams are distributed at both end positions of the hoisting beam main beam along the length direction of the hoisting beam main beam.

[0010] Preferably, the portal mechanism comprises a top cross beam connected with the hoisting mechanism, and two side support columns respectively connected with both ends of the top cross beam.

[0011] Preferably, the hoisting beam main beam is in a square structure.

[0012] Preferably, the hoisting mechanism comprises two maintenance platforms respectively arranged beside the hoisting mechanism, and used for installation and maintenance of the hoisting mechanism.

[0013] Preferably, the maintenance platform comprises a bottom platform connected with the portal mechanism, and a platform railing connected with the maintenance platform.

[0014] A pretreatment device comprises the lifting device.

[0015] This application provides a lifting device including a gantry mechanism and a hoisting mechanism, with two hoisting mechanisms respectively disposed at both ends of the gantry mechanism; a lifting mechanism for hoisting structural components, the lifting mechanism being located below the hoisting mechanisms, with two hoisting mechanisms slidably connected to the lifting mechanism, allowing the lifting mechanism and the structural components to move vertically; the lifting mechanism includes a main lifting beam, a pulley seat, the pulley seat being disposed on the main lifting beam, and two hoisting mechanisms symmetrically arranged along the length direction of the main lifting beam, each hoisting mechanism including a pulley, a wire rope assembly, and a hoisting assembly, the pulley being mounted on the pulley seat, the wire rope assembly passing around the pulley and connected to the hoisting assembly, and the hoisting assembly being connected to the wire rope assembly; the pulley seat having two spaced-apart mounting cavities, the pulley being placed within the mounting cavities, the two mounting cavities being symmetrically arranged along the width direction of the main lifting beam; the lifting mechanism includes a crossbeam, with lifting lugs disposed on the crossbeam, and connecting components being detachably connected to the structural components via the lifting lugs. This application also provides a pretreatment device equipped with the lifting device. Unlike existing technologies, this application provides a lifting device that uses a winch mechanism to drive the lifting mechanism to raise and lower the structural component. After the component is suspended in the air, it is fixed by a support device, directly exposing the bottom surface for sandblasting. Compared to existing technologies (which require removal from the workshop and flipping), this eliminates two lifting and transfer steps, shortening the overall process flow by more than 50%. Furthermore, the lifting device provided in this application allows for multi-dimensional operation; after the lifting mechanism is raised, the workpiece is in a six-sided operable state (up, down, left, right, front, and back). It should be noted that this lifting device uses two sets of winches. If the two winches are synchronized in speed, the horizontal deviation between the lifting mechanism and the structural component can be ensured, resulting in better sandblasting pretreatment. Therefore, the lifting device provided in this application eliminates the need for secondary flipping during sandblasting, allowing all secondary sandblasting processes to be completed in one go within the sandblasting workshop, making it a safer auxiliary lifting tool. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the lifting device provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the hoisting mechanism in this utility model;

[0018] Figure 3 This is a schematic diagram of the maintenance platform in this utility model;

[0019] Figure 4 This is a schematic diagram of the gantry mechanism in this utility model.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Lifting mechanism; 11. Pulley seat; 12. Lifting beam crossbeam; 13. Lifting beam main beam; 2. Maintenance platform; 21. Platform railing; 22. Bottom platform; 3. Winching mechanism; 31. Winching assembly; 32. Pulley; 33. Wire rope assembly; 4. Gantry mechanism; 41. Side support columns; 42. Top crossbeam; 5. Structural components. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0023] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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.

[0024] Figures 1 to 4 As shown, this utility model provides a lifting device, including a gantry mechanism 4 and a winch mechanism 3, with two winch mechanisms 3 respectively disposed at both ends of the gantry mechanism 4; a hoisting mechanism 1 for hoisting structural component 5, the hoisting mechanism 1 being located below the winch mechanism 3, and the two winch mechanisms 3 being slidably connected to the hoisting mechanism 1, so that the hoisting mechanism 1 and the structural component 5 can move up and down.

[0025] In the existing technology, when structural component 5 requires sandblasting pretreatment, structural component 5 is usually placed on a flatbed trolley, and the flatbed trolley and structural component 5 are transported to the sandblasting pretreatment workshop via a track. In the sandblasting pretreatment workshop, structural component 5 is sandblasted on all sides (top, front, back, left, and right). Finally, structural component 5 is transferred out and flipped over (bottom side up), and then transferred back to the sandblasting pretreatment workshop for bottom surface sandblasting. This sandblasting pretreatment method cannot perform sandblasting on all surfaces of structural component 5 at one time. The bottom surface of structural component 5 cannot be sandblasted, and structural component 5 needs to be moved out of the sandblasting workshop before being flipped over. The lifting and flipping process is dangerous and inconvenient for subsequent processes, resulting in low overall production efficiency.

[0026] Unlike existing technologies, please... Figure 1As shown, this application provides a lifting device that uses a winch mechanism 3 to drive the lifting mechanism 1 to raise and lower the structural component 5. After suspending the component 5, it is fixed using a support device, directly exposing the bottom surface for sandblasting. Compared to existing technologies (which require removal from the workshop and flipping), this eliminates two lifting and transfer steps, shortening the overall process flow by more than 50%. Furthermore, the lifting device provided in this application allows for multi-dimensional operation; after the lifting mechanism 1 is raised, the workpiece is in a six-sided operable state (up, down, left, right, front, and back). It should be noted that this lifting device uses two sets of winch mechanisms 3. If the two sets of winch mechanisms 3 achieve synchronized speeds, it can also ensure the horizontal deviation between the lifting mechanism 1 and the structural component 5, resulting in better sandblasting pretreatment. Therefore, the lifting device provided in this application eliminates the need for secondary flipping during sandblasting, allowing all secondary sandblasting processes to be completed in one go within the sandblasting workshop, making it a safer auxiliary lifting tool.

[0027] Specifically, the lifting device is an organic whole composed of a gantry mechanism 4, a winch mechanism 3, and a hoisting mechanism 1. The gantry mechanism 4 serves as the frame support structure of the entire device, providing an installation position for the winch mechanism 3 and a stable foundation frame for the entire lifting operation. The hoisting mechanism 1 is located below the winch mechanism 3 and is slidably connected to the two winch mechanisms 3. When the hoisting mechanism 1 can move up and down, it can realize the hoisting and vertical movement control of the structural component 5.

[0028] The technical advantages of this embodiment are as follows: First, the presence of the gantry mechanism 4 provides the entire device with good stability and rigidity, enabling it to withstand large vertical loads and horizontal forces generated during operation. The winch mechanisms 3 at both ends can evenly lift the hoisting mechanism 1, avoiding instability such as tilting or swaying during lifting. This is particularly suitable for lifting heavy structural components 5 where stability is a high requirement. Second, the dual winch mechanism 3 design provides greater lifting force under the same working conditions compared to a single winch mechanism 3, meeting the lifting requirements of heavier structural components 5. This configuration also increases the safety of the device; even if one winch mechanism 3 fails, the other can still provide some protection, preventing the structural component 5 from suddenly falling. Third, the sliding connection design between the hoisting mechanism 1 and the winch mechanism 3 allows the hoisting mechanism 1 to be adjusted more flexibly during vertical movement. In actual operation, it can easily and accurately place the structural component 5 into the predetermined position, improving the flexibility and accuracy of the operation. Fourth, the structural design of this lifting device makes it suitable for various types of structural component hoisting operations, such as the lifting of prefabricated components in building construction and the hoisting of heavy equipment in industrial equipment installation, thus having a wide range of applications.

[0029] Please Figure 2As shown in the embodiment provided in this application, the hoisting mechanism 1 includes a main beam 13 and a pulley seat 11. The pulley seat 11 is disposed on the main beam 13. Two winch mechanisms 3 are symmetrically arranged along the length of the main beam 13. The winch mechanism 3 includes a pulley 32, a wire rope assembly 33, and a winch assembly 31. The pulley 32 is installed on the pulley seat 11. The wire rope assembly 33 passes around the pulley 32 and is connected to the winch assembly 31. The winch assembly 31 is connected to the wire rope assembly 33.

[0030] In this embodiment, a dual-winch symmetrical drive structure is adopted. The main beam 13 of the lifting girder serves as the core load-bearing frame, with winch mechanisms 3 symmetrically arranged at both ends, forming a dual-power source collaborative operation mode. The winch assembly 31 drives the drum to rotate forward and backward via a motor, controlling the winding and unwinding of the wire rope assembly 33 to achieve the vertical lifting and lowering of the lifting mechanism 1. The pulley seat 11 serves as the transmission hub, and its installation position directly affects the wrap angle and tension distribution of the wire rope. The layout can be optimized by mechanical calculations according to needs. This dual-winch symmetrical layout balances the load distribution, avoids the risk of single-point failure, and can bear a large load. The main beam 13 of the lifting girder adopts a combination structure of I-beams or channel steel, which can greatly improve the bending stiffness and effectively suppress lifting sway.

[0031] On the other hand, pulley 32 can be supported by high-precision bearings to reduce frictional resistance. The wire rope assembly 33 bypasses pulley 32 to form a moving pulley 32 system, which can amplify the output force of the winch assembly 31 through a multiplier design to achieve heavy-duty lifting. An anti-winding mechanism can be integrated into the pulley seat 11, which actively separates and removes kinks by driving the wire rope axially through the winch assembly 31, reducing wire rope wear.

[0032] In the embodiments provided in this application, the pulley seat 11 is provided with two spaced-apart mounting cavities, and the pulleys 32 are placed in the mounting cavities. The two mounting cavities are symmetrically arranged along the width direction of the main beam 13 of the lifting beam. The two mounting cavities on the pulley seat 11 are symmetrically arranged along the width direction of the main beam 13 of the lifting beam to form a double pulley 32 group structure. This design uses geometric symmetry to make the tension of the wire rope evenly distributed on both sides of the main beam 13 of the lifting beam, reducing the phenomenon of stress concentration on one side. It is especially suitable for heavy lifting scenarios (such as bridge box girder lifting). Each mounting cavity is independently installed with a pulley, and synchronous rotation can be achieved through the bearing support in the pulley 32, ensuring the symmetry of the traction force transmission of the double winch mechanism 3. On the other hand, the mounting cavities adopt an independent partition design. Each cavity is isolated by a partition or frame to avoid mutual interference between the pulleys 32 during operation. A pulley 32 fixing structure can also be set inside the mounting cavity to realize the quick disassembly and assembly of the pulleys 32, and to realize the replacement of a single pulley 32 without disassembling the entire pulley seat 11. This redundant system, consisting of 32 sets of double pulleys, can maintain more than half of the lifting capacity on the other side even if one pulley 32 gets stuck due to an accident. This greatly improves the fault tolerance of the lifting device.

[0033] In the embodiments provided in this application, the hoisting mechanism 1 includes a lifting beam 12, on which lifting lugs are provided, and the connecting member is detachably connected to the structural member 5 through the lifting lugs.

[0034] As a key load-bearing component of the hoisting mechanism 1, the lifting beam 12 is responsible for receiving and transferring the weight of the hoisted structural component 5. Through the lifting lugs set on the lifting beam 12, connecting parts (such as wire ropes, chains, etc.) can be connected to it, thereby distributing the weight of the structural component 5 onto the lifting beam 12. Through reasonable structural design and material selection, the lifting beam 12 has sufficient strength and rigidity to bear and evenly distribute these forces, avoid local stress concentration, and ensure the stability and safety of the hoisting process.

[0035] The connector is detachably connected to structural component 5 via lifting lugs. This design is typically based on standard mechanical connection methods, such as bolt connections or pin connections. This detachable connection allows for quick and easy connection of the connector to structural component 5 to form a complete lifting system when the structure needs to be lifted. After the lifting operation is completed, the connector can be easily disassembled, facilitating the placement and installation of structural component 5 and the reuse of the connector.

[0036] The lifting lugs are positioned at specific locations on the lifting beam 12, enabling precise control of the attitude and position of structural component 5 during hoisting. By adjusting the connection method and position of the connectors on the lifting lugs, fine-tuning of the horizontality and verticality of structural component 5 can be achieved, facilitating precise positioning and installation. This embodiment employs detachable connections, allowing individual components (such as the lifting beam 12, connectors, and lifting lugs) to be replaced and repaired individually after damage or wear, eliminating the need for large-scale replacement of the entire hoisting system and reducing maintenance costs. Furthermore, its versatility reduces redundant investment in hoisting equipment, resulting in better long-term economic benefits.

[0037] In the example provided in this application, the number of the lifting beam crossbeams 12 is directly proportional to the length of the structural member 5. The lifting beam crossbeams are evenly distributed at both ends of the main beam 13 along its length.

[0038] The design of the number of lifting beams 12 being proportional to the length of structural component 5 achieves uniform load distribution by increasing the density of support points. For example, when the length of structural component 5 exceeds 15m, an additional set of beams is required for every 5m increase, decomposing the concentrated load into multiple support points. This reduces the bending moment of the main lifting beam by approximately 40%. The lifting beams are evenly distributed at both ends along the length of the main lifting beam, forming a symmetrical support system. Through the lever principle, the lifting beams at both ends transfer the tension to the main lifting beam, suppressing torsional deformation caused by eccentric loading during lifting. The technical advantage of this embodiment is that the uniform load distribution design makes the main lifting beam more evenly stressed, reducing the peak stress on one side, making it particularly suitable for anti-sway control of ultra-long structural components 5. Furthermore, when a single lifting beam fails, the remaining beams can still bear a significant load, thus achieving the goal of matching the load requirements during lifting by increasing the number of lifting beams.

[0039] Furthermore, the gantry mechanism 4 includes a top crossbeam 42, which is connected to the hoisting mechanism 3; and two side support columns 41, which are respectively connected to the two ends of the top crossbeam 42.

[0040] The top beam 42, serving as the main load-bearing component, is rigidly connected to the side support columns 41 at both ends (e.g., by welding or flange connection), forming a closed portal frame structure. This design transforms the vertical load transmitted by the hoisting mechanism 3 and the bending moment generated by the hoisting operation into tensile and compressive stresses in the top beam 42 and axial pressures in the side support columns 41, achieving efficient load distribution. The bending stiffness of this portal frame structure is significantly improved compared to a single-arm structure.

[0041] In the embodiments provided in this application, the main beam 13 of the lifting girder is a square structure. Preferably, the square main beam 13 of the lifting girder can be assembled by welding multiple pieces of steel. Its moment of inertia and section modulus of bending are significantly better than those of traditional I-beams or circular tube structures. For example, the bending strength of a box girder with the same cross-sectional area is greatly improved, which can effectively resist bidirectional bending moment and torque during lifting operations.

[0042] Please Figure 3 As shown, in another embodiment provided in this application, the lifting device includes a maintenance platform 2. Two maintenance platforms 2 are respectively located beside the winch mechanism 3 for the installation and maintenance of the winch mechanism 3. The two maintenance platforms 2 are symmetrically distributed on both sides of the winch mechanism 3, forming a dual-station layout. Preferably, precise alignment between the platform and the winch components can be achieved through a slide rail or a hydraulic lifting mechanism. During maintenance, operators can simultaneously access the key components of the winch through the platform, avoiding the risk of equipment overload caused by unilateral operation.

[0043] The maintenance platform 2 includes a bottom platform 22, which is connected to the gantry mechanism 4; and a platform railing 21, which is also connected to the maintenance platform 2. The bottom platform 22 is fixed to the side support columns 41 of the gantry mechanism 4 by welding or bolting, forming a stable load-bearing frame. The vertical load of the gantry mechanism 4 is distributed to the ground through the bottom platform 22. Limiting slots or sliding rails can be installed at the edges of the bottom platform 22 to accommodate maintenance equipment of different sizes. The platform railing's fall-prevention design reduces the risk of personnel falling.

[0044] This application also provides a pretreatment device, including the above-mentioned lifting device, which also possesses all the technical advantages of the lifting device, and will not be described in detail here.

[0045] The embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hoisting device, characterized in that The lifting device comprises a portal mechanism (4), two winch mechanisms (3) arranged at two ends of the portal mechanism (4) respectively, and a hoisting mechanism (1) for hoisting a structural member (5), wherein the hoisting mechanism (1) is located below the winch mechanisms (3), and the two winch mechanisms (3) are slidably connected with the hoisting mechanism (1) respectively, so that the hoisting mechanism (1) and the structural member (5) move up and down. The hoisting mechanism (1) comprises a hoisting beam main beam (13) and a pulley seat (11), the pulley seat (11) is arranged on the hoisting beam main beam (13), the two winch mechanisms (3) are symmetrically arranged along the length direction of the hoisting beam main beam (13), the winch mechanism (3) comprises a pulley (32), a steel wire rope group (33), and a winch assembly (31), the pulley (32) is installed on the pulley seat (11), the steel wire rope group (33) is wound around the pulley (32) and connected with the winch assembly (31), and the winch assembly (31) is connected with the steel wire rope group (33). Two spaced installation cavities are arranged on the pulley seat (11), the pulley (32) is arranged in the installation cavity, and the two installation cavities are symmetrically arranged along the width direction of the hoisting beam main beam (13). The hoisting mechanism (1) comprises a hoisting beam cross beam (12), the hoisting beam cross beam (12) is provided with an ear, and a connecting piece is detachably connected with the structural member (5) through the ear.

2. The lifting device of claim 1, wherein, The number of the hoisting beam cross beams (12) is in a positive proportional relationship with the length of the structural member (5), the hoisting beam cross beams (12) are arranged on the hoisting beam main beam (13) and are uniformly distributed at both end positions along the length direction of the hoisting beam main beam (13).

3. The lifting device of claim 2, wherein, The portal mechanism (4) comprises a top cross beam (42), the top cross beam (42) is connected with the winch mechanism (3). Two side support columns (41) are connected with both ends of the top cross beam (42) respectively.

4. The lifting device of claim 3, wherein, The hoisting beam main beam (13) is in a square structure.

5. A lifting device according to any one of claims 1 to 4, characterised in that, The lifting device comprises two maintenance platforms (2) arranged beside the winch mechanisms (3) respectively, and used for installation and maintenance of the winch mechanisms (3).

6. The lifting device of claim 5, wherein, The maintenance platform (2) comprises a bottom platform (22), the bottom platform (22) is connected with the portal mechanism (4). A platform guardrail (21) is connected with the maintenance platform (2).

7. A pre-treatment apparatus characterized by, The lifting device comprises any one of claims 1-6.

Images