Integral dismounting and hoisting device for upper structure of aluminum electrolysis cell

Abstract

The utility model discloses an integral dismounting and hoisting device for an upper structure of an aluminum electrolysis cell, and relates to the technical field of hoisting of aluminum electrolysis cells, in particular to the integral dismounting and hoisting device for the upper structure of the aluminum electrolysis cell, which comprises a main beam, lug plates are sleeved at two ends of the surface of the main beam, and pin shaft holes are formed in the bottoms of one sides of the lug plates. And a pin shaft is inserted into the pin shaft hole. Considering that the electrolysis workshop is in a power-on state and is greatly influenced by a magnetic field, the assembling, welding and hoisting difficulty is increased, lifting hooks of two multifunctional bridge cranes in the electrolysis workshop are fixed lifting hooks, and the positions of lifting points cannot be adjusted, the special lifting appliance designed by the construction method forms a stable structure system to load, unload and integrally hoist the structure on the electrolysis bath; according to the characteristics and weight of the cell shell of the electrolytic cell, stress checking calculation is conducted, the pin shafts, the lug plates, the main beams and the cross beams are arranged in a matched mode to be connected, a whole hoisting system is formed, the stability and safety of hoisting of the upper structure of the aluminum electrolytic cell are greatly improved, and meanwhile operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolytic cell hoisting technology, specifically to an overall disassembly and hoisting device for the upper structure of an aluminum electrolytic cell. Background Technology

[0002] Currently, in order to improve the production efficiency of electrolytic cells and reduce production costs, the electrolytic aluminum industry is constantly upgrading and overhauling electrolytic cells. Whether it is upgrading or overhauling, it is necessary to dismantle the upper structure of the electrolytic cell. After shutting down the cell by powering off, the entire upper structure of the electrolytic cell needs to be lifted out of the cell. Since the construction area is located in the electrolysis workshop, the workshop operation is a live operation. Therefore, there is a magnetic field in the electrolysis workshop that affects the construction. The magnetic field is mainly generated by the high DC current used in the electrolytic cell, which can reach hundreds of thousands of amperes or even higher. According to Ampere's law, the current flowing through the conductor will generate a magnetic field around it. Moreover, the current in the electrolytic cell is not uniformly distributed, especially near the electrodes, where the current density is higher, and a strong magnetic field is generated near the electrodes of the electrolytic cell.

[0003] Because the upper structure of the electrolytic cell is mainly composed of steel, the magnetic field will generate mutual attraction or repulsion forces on the steel structure during construction. Therefore, it is not only affected by the magnetic field of the electrolysis workshop during assembly and welding, but also has a significant impact on the overall hoisting of the upper structure of the electrolytic cell. On-site assembly and welding cannot achieve stable, safe and efficient hoisting compared with traditional hoisting methods. Therefore, based on the electrolytic cell design drawings and the hoisting equipment in the workshop, special hoisting tools were designed and calculated to carry out the overall stable and safe disassembly and assembly of the upper structure of the electrolytic cell. Utility Model Content

[0004] The purpose of this utility model is to provide an overall disassembly and hoisting device for the upper structure of an aluminum electrolytic cell. By setting up a main beam, ear plate, cross beam and triangular stiffener plate, it solves the problem that because the upper structure of the electrolytic cell is mainly composed of steel structure, the magnetic field will generate mutual attraction or repulsion force on the steel structure during construction. Therefore, it is not only affected by the magnetic field of the electrolysis workshop during assembly and welding, but also has a great impact on the overall hoisting of the upper structure of the electrolytic cell. On-site assembly and welding and traditional hoisting methods cannot achieve stable, safe and efficient hoisting.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an overall disassembly and hoisting device for the upper structure of an aluminum electrolysis cell, including a main beam, with ear plates sleeved at both ends of the surface of the main beam, a pin hole opened at the bottom of one side of the ear plate, a pin inserted into the pin hole, and a crossbeam fixedly connected to the ear plate by the pin.

[0006] Preferably, triangular stiffeners are welded to both sides of the upper surface of the main beam, and multiple partitions are welded between the triangular stiffeners.

[0007] Preferably, the main beam has multiple A-shaped webs welded inside, and lifting points are welded to both sides of the lower surface of the main beam.

[0008] Preferably, the inner wall of the crossbeam is welded with multiple B-shaped webs, and the upper surface of the crossbeam is welded with a limit baffle.

[0009] Preferably, the main beam is made of Q235B carbon structural steel, the crossbeam is made of S30408 ​​stainless steel, and the ear plate is made of Q355B steel plate.

[0010] This utility model provides an overall disassembly and hoisting device for the upper structure of an aluminum electrolysis cell, which has the following advantages:

[0011] Considering that the electrolysis workshop is energized and significantly affected by magnetic fields, the assembly, welding, and hoisting processes are more difficult. Furthermore, the two multi-functional bridge cranes in the electrolysis workshop have fixed hooks, and the lifting point positions cannot be adjusted. Therefore, this construction method designs a special hoisting system to form a stable structural system for loading, unloading, and overall hoisting of the upper structure of the electrolysis cell. Based on the characteristics and weight of the electrolysis cell shell, stress calculations are performed, and pins, ear plates, main beams, and crossbeams are used for connection to form the entire hoisting system. This significantly improves the stability and safety of hoisting the upper structure of the aluminum electrolysis cell, while also increasing operational efficiency. Attached Figure Description

[0012] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a structural breakdown diagram of the main beam of this utility model;

[0015] Figure 3 This is a structural breakdown diagram of the crossbeam of this utility model.

[0016] The image shows:

[0017] 1. Main beam; 2. Ear plate; 3. Pin hole; 4. Pin; 5. Crossbeam; 6. Triangular stiffener plate; 7. Partition plate; 8. Web A; 9. Lifting point of sling; 10. Web B; 11. Limiting baffle. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment proposes an overall disassembly and hoisting device for the upper structure of an aluminum electrolytic cell, including a main beam 1. Ear plates 2 are sleeved at both ends of the surface of the main beam 1. A pin hole 3 is opened at the bottom of one side of the ear plate 2, and a pin 4 is inserted into the pin hole 3. Due to the large magnetic field present in the production workshop, the pin 4 is made of S30408 ​​stainless steel for easy installation and removal. The diameter of the pin 4 is selected based on the load weight and stress calculation. The pin 4 is a stepped pin, with the larger end serving as a limit and the smaller end inserted into the pin hole 3. A hole is provided at the insertion end for inserting an anti-detachment pin to fix it left and right. The ear plates 2 are fixedly connected to a crossbeam 5 via the pin 4. The ear plates 2 and the pin 4 connect the main beam 1 and the crossbeam 5, forming an overall fixed hoisting system, which can then be used with a multi-functional bridge crane to hoist the upper structure of the electrolytic cell.

[0021] The construction area is located inside the electrolysis workshop. The upper structure of the electrolytic cell is prefabricated in the processing plant and transported to the site outside the electrolysis workshop for assembly. Two existing multi-functional bridge cranes in the electrolysis workshop are used for dual-machine lifting. One cell is assembled and then lifted, forming an assembly line construction. This effectively solves the problems of large site occupation and complicated handover of on-site assembly processes, makes fuller use of the site, reduces interference with production, and greatly shortens the construction cycle.

[0022] Both sides of the upper surface of the main beam 1 are welded with triangular stiffening plates 6, and multiple partition plates 7 are welded between the triangular stiffening plates 6.

[0023] Two triangular stiffening plates 6 are added to the tension zone at the top of the beam, and seven partition plates 7 are evenly arranged between the triangular stiffening plates 6 to improve its stress distribution.

[0024] The main beam 1 has multiple A-shaped web plates 8 welded inside, and lifting points 9 are welded on both sides of the lower surface of the main beam 1.

[0025] The lifting point 9 of the sling is composed of two steel plates forming a baffle. This serves two purposes: first, to facilitate the confirmation of the lifting point position, and second, to prevent the sling from slipping. The position of the lifting point is mainly determined based on the two fixed hook distances of the existing bridge crane in the electrolysis workshop. H-beams are used with longitudinal A-web plates 8 to form a box beam with five A-web plates 8 as the main beam 1, thereby improving the load-bearing capacity of the equipment and reducing deformation.

[0026] The inner wall of the crossbeam 5 is welded with multiple B-shaped web plates 10, and the upper surface of the crossbeam 5 is welded with a limit baffle 11.

[0027] A box-shaped beam 5, consisting of four B-shaped webs 10 and upper and lower flanges, is formed by welding stainless steel plates. Its length is determined based on the fixed hook distance of the two existing bridge cranes in the electrolysis workshop. First, ear plates 2 are set at both ends of the beam 5, with the ear plates 2 positioned in the center. Second, pin holes are reserved in the middle of the four B-shaped webs 10 according to the position of the ear plates 2. The limiting baffles 11 are set according to the window spacing of the upper structural beam of the electrolysis cell.

[0028] The main beam 1 is made of Q235B carbon structural steel, the crossbeam 5 is made of S30408 ​​stainless steel, and the ear plate 2 is made of Q355B steel plate.

[0029] Based on the overall weight of the electrolytic cell's upper structure, the weight of the main lifting beam 1, and the lifting crossbeam 5, stress calculations were performed to select a suitable plate thickness and dimensions. Laser cutting was then employed to ensure the correct cutting dimensions.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An overall disassembly and hoisting device for the upper structure of an aluminum electrolytic cell, including a main beam (1), characterized in that: The main beam (1) has ear plates (2) sleeved at both ends. A pin hole (3) is opened at the bottom of one side of the ear plate (2). A pin (4) is inserted into the pin hole (3). The ear plate (2) is fixedly connected to the cross beam (5) through the pin (4).

2. The overall disassembly and hoisting device for the upper structure of the aluminum electrolysis cell according to claim 1, characterized in that: Both sides of the upper surface of the main beam (1) are welded with triangular stiffeners (6), and multiple partitions (7) are welded between the triangular stiffeners (6).

3. The overall disassembly and hoisting device for the upper structure of the aluminum electrolytic cell according to claim 1, characterized in that: The main beam (1) has multiple A-shaped web plates (8) welded inside, and lifting points (9) are welded on both sides of the lower surface of the main beam (1).

4. The overall disassembly and hoisting device for the upper structure of the aluminum electrolytic cell according to claim 1, characterized in that: The inner wall of the crossbeam (5) is welded with multiple B-shaped web plates (10), and the upper surface of the crossbeam (5) is welded with a limit baffle (11).

5. The overall disassembly and hoisting device for the upper structure of the aluminum electrolysis cell according to claim 1, characterized in that: The main beam (1) is made of Q235B carbon structural steel, the crossbeam (5) is made of S30408 ​​stainless steel, and the ear plate (2) is made of Q355B steel plate.

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