A hoisting device and method for the lower electrode plate of a spherical tank

Abstract

This invention discloses a hoisting device and method for the lower electrode plate of a spherical tank. A fixed base is pre-welded and fixed to the surface of the electrode plate. A hoisting ring is connected to a vertical plate. The hoisting device is operated to lower the hook, aligning the positioning insertion hole of the main frame 1 of the hoisting point with the top of the fixed base. The hook continues to lower, and the initial connection between the main frame and the fixed base is achieved through the guidance of the positioning slide bar and positioning groove. A locking shaft is inserted into the shaft through hole on the fixed base, and the locking bolt is rotated so that its head end face presses against the inner side of the side plate of the main frame. Finally, the hoisting device is operated to officially hoist the lower electrode plate of the spherical tank. Using the hoisting device and method for the lower electrode plate of the spherical tank provided by this invention, there is no need to temporarily set up an auxiliary center column for the installation of the electrode plate. The installation can be carried out after the electrode plate has been calibrated and leveled on the ground, significantly improving construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of spherical tank installation technology, and in particular to a hoisting device and method for the lower pole plate of a spherical tank. Background Technology

[0002] Spherical tanks are large pressure vessels used in industries such as petrochemicals. The upper and lower plate belts at the bottom of the spherical tank are the core pressure-bearing components, characterized by bidirectional curvature, heavy weight, and large volume.

[0003] Currently, during the on-site installation of electrode plates on spherical tanks, a central column needs to be erected at the center of the tank. This central column serves as the load-bearing point for the lifting equipment, enabling the electrode plates to be lifted, leveled, and positioned. Due to the complex spherical structure of the electrode plates and the challenging construction site environment, it is extremely difficult for operators to accurately place the heavy plate lifting lugs at the design reference position. This often requires a significant amount of manual labor for repeated measurements and adjustments, resulting in low efficiency in lifting point positioning and a high risk of initial alignment deviations, making it impossible to guarantee that the actual installation position completely coincides with the design reference.

[0004] Furthermore, during lifting and positioning operations, the electrode plates of the spherical tank need to withstand enormous vertical tensile loads and shear forces generated by the continuous changes in the equipment's posture, which may lead to plate deformation and localized stress. Traditional welded plate lifting lugs, with their simple direct fixing method, lack high-strength mechanical interlocking and anti-shifting structures. In the event of heavy loads at heights or uneven stress, the lifting point connections are prone to relative displacement, and under severe tension, may even lead to connection failure and accidental detachment, posing a serious danger and failing to guarantee absolute stability during high-altitude lifting operations. Summary of the Invention

[0005] The purpose of this invention is to provide a hoisting device and method for the lower electrode plate of a spherical tank, which solves the problems of uneven stress distribution, insufficient connection stability, and safety hazards caused by the unrestrained swing of the lifting rings in the existing device under high-intensity lifting conditions.

[0006] To achieve the above objectives, according to one aspect of the present invention, a lifting device for the lower electrode plate of a spherical tank is provided, comprising a fixed base and a lifting point main frame slidably sleeved outside the fixed base; The fixed base is a cuboid structure and is fixed to the surface of the lower electrode plate of the spherical tank; the main frame of the lifting point is a "U" shaped structure, including a base plate and side plates that are vertically fixed to both sides of the base plate. The base plate of the main frame of the lifting point is provided with positioning insertion holes; the top of the fixed base is inserted into the positioning insertion holes. Positioning slide bars are provided on both sides of the positioning insertion hole, and positioning slide grooves are provided on both sides of the fixed base. The positioning slide bars are slidably connected to the inside of the positioning slide grooves. A through hole is provided between the front and rear ends of the fixed base, and a locking shaft passes through the through hole and is locked.

[0007] In a preferred embodiment, locking bolts are installed at both ends of the locking shaft, and the head end face of the locking bolts is pressed against the inner side of the side plate of the main frame of the lifting point.

[0008] In a preferred embodiment, the bottom plate of the main frame of the suspension point extends to both sides to form a bottom support plate, and a vertical plate is fixedly connected to the upper part of the main frame of the suspension point; the vertical plate has an inverted U-shaped structure, including a top plate and vertical plates fixed to the lower ends of both sides of the top plate, and the vertical plates are on the outside of the bottom support plate and the side plates of the main frame of the suspension point.

[0009] In a preferred embodiment, a lifting ring is provided at the top of the vertical plate.

[0010] In a preferred embodiment, a lifting ring limiting block is provided on each side of the bottom of the top plate of the vertical plate, and the bottom of the lifting ring is placed in the gap formed by the two lifting limiting blocks.

[0011] In a preferred embodiment, a diagonal reinforcing rib is fixedly connected between the top plate of the main frame of the suspension point and the top plate of the vertical plate.

[0012] In a preferred embodiment, a diagonal reinforcing rib is fixedly connected between the bottom support plate and the vertical plate.

[0013] According to another aspect of the present invention, a method for hoisting the lower electrode plate of a spherical tank is provided, employing the above-described hoisting device for the lower electrode plate of a spherical tank, comprising: Step 1: Weld the fixed base to the surface of the spherical tank plate in advance, connect the lifting ring to the vertical plate, operate the lifting device to lower the hook so that the positioning insertion hole of the main frame 1 of the lifting point is aligned with the top of the fixed base, continue to lower the hook, and achieve the initial connection between the main frame of the lifting point and the fixed base through the guidance of the positioning slide and the positioning slide groove. Step 2: Insert the locking shaft into the shaft through hole on the fixed base, and rotate the locking bolt so that its head end face presses against the inside of the side plate of the main frame of the lifting point; Step 3: Operate the lifting device to officially lift the lower pole plate of the spherical tank.

[0014] The spherical tank lower electrode plate hoisting device and method provided by this invention eliminates the need for temporary auxiliary central columns for electrode plate installation. The electrode plate can be installed after being calibrated and leveled on the ground, eliminating local stress during component docking and reducing the welding area of ​​the hoisting points. The hoisting device can be quickly assembled and conveniently positioned, significantly improving construction efficiency. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0016] Figure 1 This is a three-dimensional schematic diagram of the hoisting device for the lower electrode plate of the spherical tank proposed in this invention; Figure 2 This is a side view of the spherical tank lower electrode plate hoisting device proposed in this invention; Figure 3 This is a schematic diagram of the main frame of the lifting point of the spherical tank lower electrode plate lifting device proposed in this invention; Figure 4 This is a schematic diagram of the vertical plate of the spherical tank lower electrode plate hoisting device proposed in this invention; Figure 5 This is a schematic diagram of the structure of the fixed base of the hoisting device for the lower electrode plate of the spherical tank proposed in this invention; Figure 6 This is a schematic diagram of the structure of the locking shaft of the hoisting device for the lower electrode plate of the spherical tank proposed in this invention.

[0017] In the diagram, 1. Main frame of the lifting point; 2. Vertical plate; 3. Lifting ring limiting block; 4. Diagonal reinforcing rib; 5. Bottom support plate; 6. Positioning insertion hole; 7. Positioning slide bar; 8. Fixed base; 9. Positioning slide groove; 10. Shaft through hole; 11. Locking shaft; 12. Locking bolt; 13. Lifting ring. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described clearly and completely below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] The basic concept of this invention is to eliminate the need for a central column and instead weld a hoisting device onto the pole plate of the spherical tank to facilitate the installation of the pole plate. This method saves on the materials and erection costs associated with setting up a central column. After quickly positioning and installing the hoisting device on the ground, construction workers can directly proceed with the installation of the pole plate. This method reduces the frequency of high-altitude operations, lowers operational risks, improves construction efficiency, and saves on construction time and costs.

[0020] Based on the above basic concept, a typical embodiment of the present invention provides a hoisting device for the lower electrode plate of a spherical tank, including a fixed base 8 and a hoisting point main frame 1 slidably sleeved on the outside of the fixed base 8. The fixed base 8 is pre-fixed to the surface of the lower electrode plate of the spherical tank, serving as a basic platform to provide a positioning reference and bottom support point. The hoisting point main frame 1 is used to bear the lifting force from above and serves as the core skeleton for connecting internal components.

[0021] The fixed base 8 is a cuboid structure and is fixed to the surface of the lower electrode plate of the spherical tank; the main frame 1 of the lifting point is a "U" shaped structure, including a base plate and side plates that are vertically fixed to both sides of the base plate. The base plate of the main frame 1 of the lifting point is provided with a positioning insertion hole 6; the top of the fixed base 8 is inserted into the positioning insertion hole 6.

[0022] Positioning slides 7 are provided on both sides of the positioning insertion hole 6, and positioning grooves 9 are provided on both sides of the fixed base 8. The positioning slides 7 are slidably connected inside the positioning grooves 9. The positioning slides 7 and positioning grooves 9 are used to guide and restrict the main frame 1 of the lifting point to fall and fit into the fixed base 8, so as to ensure that the installation position of the lifting point is completely consistent with the preset design benchmark.

[0023] A through hole 10 is provided between the front and rear end faces of the fixed base 8, and a locking shaft 11 passes through the through hole 10 and is locked. The locking shaft 11 is used to withstand the shear stress converted from the vertical tension during the hoisting process, so that a high-strength rigid anti-detachment connection is formed between the fixed base 8 and the main frame 1 of the hoisting point.

[0024] To ensure efficient assembly at the lifting site and to accommodate dimensional tolerances in heavy industrial environments, a clearance fit is used between the locking shaft 11 and the inner wall of the shaft through hole 10. This allows on-site construction personnel to quickly complete the insertion of the locking shaft 11 after the main frame 1 of the lifting point and the fixed base 8 are initially aligned. At the same time, the clearance fit also provides necessary physical buffer space for minor deformations under heavy loads during high-altitude lifting.

[0025] In a preferred embodiment, locking bolts 12 are installed at both ends of the locking shaft 11, and the head end face of the locking bolt 12 is pressed against the inner side of the side plate of the main frame 1 of the lifting point. The locking bolt 12 restricts the displacement of the locking shaft 11 through the mechanical pressing action of its head end face, avoiding the risk of the locking shaft 11 dislodging and falling off under heavy load and high-altitude swaying conditions, and ensuring a stable connection.

[0026] To address the technical problems of concentrated lifting forces leading to equipment deformation and detachment, as well as lateral swaying during hoisting, the spherical tank lower electrode plate hoisting device provided in this embodiment further includes a vertical support plate 2 and a bottom support plate 5. The bottom support plate 5 is formed by the bottom plate of the main lifting frame 1 extending to both sides, and the vertical support plate 2 is fixedly connected to the upper part of the main lifting frame 1. The vertical support plate 2 has an inverted U-shaped structure, including a top plate and vertical plates fixed to the lower ends of both sides of the top plate, and the vertical plates are located on the outer sides of the bottom support plate 5 and the side plates of the main lifting frame 1.

[0027] The vertical support plate 2 is used to bear and transmit the vertical upward pulling force during the lifting operation, and the bottom support plate 5 is used to increase the overall load-bearing area and structural strength of the bottom of the main frame 1 of the lifting point.

[0028] The top plate of the vertical plate 2 is equipped with a lifting ring 13. A lifting ring limiting block 3 is provided on each side of the bottom of the top plate of the vertical plate 2, and the bottom of the lifting ring 13 is placed in the gap formed by the two lifting limiting blocks 3.

[0029] The lifting ring 13 is inserted inside the vertical plate 2, serving as the direct force connection point with the external lifting equipment. The lifting ring limiting block 3 abuts against the lifting ring 13 to forcibly constrain the force direction of the lifting ring 13. This allows the lifting ring limiting block 3 to restrict the lateral swing range of the lifting ring 13 from both sides when the lifting ring 13 is tightened, thus avoiding uneven load distribution and equipment damage risk caused by lateral sway of the lifting ring 13 during high-altitude lifting.

[0030] In a preferred embodiment, a diagonal reinforcing rib 4 is fixedly connected between the top plate of the main frame 1 and the top plate of the vertical plate 2. A diagonal reinforcing rib 4 is fixedly connected between the bottom support plate 5 and the vertical plate 2.

[0031] The diagonal reinforcing rib 4 forms a triangular support structure through its fixed connection with the main frame 1 of the lifting point, the vertical plate 2, and the bottom support plate 5. The diagonal reinforcing rib 4 is used to effectively disperse and transfer the concentrated tensile stress at the vertical plate 2 to the main frame 1 of the lifting point and the bottom support plate 5 during lifting operations. This multi-node spatial frame connection greatly improves the overall deformation resistance of the mechanism and significantly extends its safe service life under high-intensity working conditions.

[0032] Another typical embodiment of the present invention provides a method for hoisting the lower electrode plate of a spherical tank based on the above-mentioned device.

[0033] At the beginning of the hoisting operation, the fixed base 8 is pre-welded and fixed to the surface of the spherical tank's electrode plate. Then, the hoisting equipment is used to lift and lower the main frame 1 of the hoisting point, so that the positioning insertion hole 6 at the bottom of the main frame 1 is aligned with the top of the fixed base 8. As the main frame 1 of the hoisting point moves downward, the positioning slide 7 slides downward into the positioning groove 9. The outer wall of the positioning slide 7 and the inner wall of the positioning groove 9 remain in sliding contact until the fixed base 8 is fully inserted into the positioning insertion hole 6. The positioning and initial connection between the main frame 1 of the hoisting point and the fixed base 8 are achieved through the mechanical guide interlock between the positioning slide 7 and the positioning groove 9, ensuring that the actual hoisting and installation position coincides with the preset design benchmark.

[0034] After the main frame 1 of the lifting point is initially connected to the fixed base 8, the locking shaft 11 is inserted into the shaft through hole 10 of the fixed base 8, so that the locking shaft 11 passes through the fixed base 8 and the main frame 1 of the lifting point laterally. Then, the locking bolts 12 are rotated until the head end face of the locking bolts 12 is pressed against the inner side of the side plate of the main frame 1 of the lifting point.

[0035] During the formal lifting phase, external lifting equipment lifts the object upwards. Multiple sets of diagonal reinforcing ribs 4, through a rigid fixing structure with the main frame 1 of the lifting point, the vertical plate 2, and the bottom support plate 5, effectively disperse stress, significantly improve the tensile deformation resistance of the overall structure of the main frame 1 of the lifting point, and effectively extend the service life under high-intensity load conditions.

[0036] During the lifting operation, the lifting ring 13 is taut under stress, and the lifting ring limiting block 3 directly abuts against the outer edge of the lifting ring 13, which strictly limits the swing range of the lifting ring 13 and constrains the force direction of the lifting ring 13, forcing the lifting ring 13 to remain on the vertical tension axis, and avoiding lateral swaying of the lifting ring 13 due to the change in the posture of the lower pole plate of the spherical tank during the lifting process.

[0037] The scope of protection claimed by this invention is not limited to the specific embodiments described above. For those skilled in the art, this invention can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A hoisting device for the lower electrode plate of a spherical tank, characterized in that, It includes a fixed base (8) and a main frame (1) of the suspension point that is slidably sleeved on the outside of the fixed base (8); The fixed base (8) is a cuboid structure and is fixed to the surface of the lower pole plate of the spherical tank; the main frame (1) of the lifting point is a "U" shaped structure, including a base plate and side plates that are vertically fixed to both sides of the base plate. The base plate of the main frame (1) of the lifting point is provided with a positioning insertion hole (6); the top of the fixed base (8) is inserted into the positioning insertion hole (6). Positioning slides (7) are provided on both sides of the positioning insertion hole (6), and positioning grooves (9) are provided on both sides of the fixed base (8). The positioning slides (7) are slidably connected to the inside of the positioning grooves (9). A shaft through hole (10) is provided between the front and rear end faces of the fixed base (8), and the locking shaft (11) passes through the shaft through hole (10) and is locked.

2. The spherical tank lower electrode plate hoisting device according to claim 1, characterized in that, Both ends of the locking shaft (11) are equipped with locking bolts (12), and the head end face of the locking bolts (12) is pressed against the inner side of the side plate of the main frame (1) of the lifting point.

3. The spherical tank lower electrode plate hoisting device according to claim 2, characterized in that, The bottom plate of the main frame (1) of the suspension point extends to both sides to form a bottom support plate (5), and a vertical plate (2) is fixedly connected to the upper part of the main frame (1); the vertical plate (2) is an inverted U-shaped structure, including a top plate and vertical plates fixed to the lower ends of both sides of the top plate, and the vertical plate is connected to the bottom support plate (5) and the side plate of the main frame (1) of the suspension point.

4. The spherical tank lower electrode plate hoisting device according to claim 3, characterized in that, The top plate of the vertical plate (2) is equipped with a lifting ring (13).

5. The spherical tank lower electrode plate hoisting device according to claim 4, characterized in that, The top plate of the vertical plate (2) is provided with a lifting ring limiting block (3) on each side of the bottom of the top plate, and the bottom of the lifting ring (13) is placed in the gap formed by the two lifting limiting blocks (3).

6. The spherical tank lower electrode plate hoisting device according to claim 5, characterized in that, An oblique reinforcing rib (4) is fixedly connected between the top plate of the main frame (1) of the suspension point and the top plate of the vertical plate (2).

7. The spherical tank lower electrode plate hoisting device according to claim 6, characterized in that, The bottom support plate (5) and the vertical plate (2) are fixedly connected by diagonal reinforcing ribs (4).

8. A method for hoisting the lower electrode plate of a spherical tank, characterized in that: The spherical tank lower electrode plate hoisting device according to claim 7 includes: Step 1: Weld the fixed base (8) to the surface of the spherical tank plate in advance, connect the lifting ring (13) to the vertical plate (2), operate the lifting device to lower the hook so that the positioning insertion hole (6) of the main frame 1 of the lifting point is aligned with the top of the fixed base (8), continue to lower the hook, and achieve the initial connection between the main frame 1 of the lifting point and the fixed base (8) through the guidance of the positioning slide (7) and the positioning slide (9); Step 2: Insert the locking shaft (11) into the shaft through hole (10) on the fixed base (8) and rotate the locking bolt (12) so that its head end face presses against the inside of the side plate of the main frame (1) of the lifting point; Step 3: Operate the lifting device to officially lift the lower pole plate of the spherical tank.

Images