Online integral leveling construction method and device system for electrolytic cell and matched aluminum bus

Abstract

The invention discloses an electrolytic cell and matched aluminum bus on-line integral leveling construction method and device system, and relates to the technical field of electrolytic aluminum equipment. The method comprises the following steps: measuring the inclination height difference of the electrolytic cell and calculating a jacking parameter; a jacking point is arranged on a supporting beam at the bottom of the tank shell; checking the insulation condition and carrying out insulation fixation; measuring the temperature; arranging a jacking device, a tensioning device and a measuring device; the jacking of the groove body and the bus is carried out in a step-by-step and repeated mode. The device system comprises a groove body jacking device, a bus jacking device, a supporting beam tensioning device and a levelness measuring device, the jacking device is provided with an insulation structure, the supporting beam tensioning device is used for preventing a supporting beam from deforming and shifting, and the levelness measuring device is used for monitoring the jacking displacement amount in real time. The jacking and leveling operation can be safely and efficiently completed under the condition that the electrolytic cell is not stopped, and the problem of differential settlement of the electrolytic cell foundation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum electrolysis equipment, and in particular to an online integral leveling construction method and device system for an electrolytic cell and a matching aluminum busbar. Background Art

[0002] The electrolytic cell is the core equipment in the electrolytic aluminum production process, which is mainly composed of the cell shell, cell lining, cathode busbar around the cell, superstructure and anode busbar. In working condition, the total weight of the electrolytic cell can reach hundreds of tons, all of which is borne by the concrete foundation under the cell shell, so there are extremely high requirements for the bearing capacity and stability of the foundation.

[0003] However, in actual production, due to the special geological environment in the northwest region, deep backfill foundations often contain collapsible loess, resulting in insufficient bearing capacity of the foundation. At the same time, factors such as unreasonable pile foundation selection or poor drainage around the foundation can also cause rainwater to penetrate into the foundation. These problems ultimately lead to uneven settlement of the electrolytic cell foundation, which in turn causes the electrolytic cell body and the busbar around the cell to tilt and deform, posing a huge safety hazard to the normal production of the electrolytic cell and the entire electrolysis workshop.

[0004] In view of the particularity of the electrolytic aluminum production process, the electrolytic cell system cannot be shut down for maintenance at will. Therefore, in actual production, there is an urgent need for a technical solution that can lift and level the electrolytic cell shell and the busbar around the cell without stopping the cell or stopping production, so as to reduce the impact of uneven settlement and ensure safe production. At present, there is no special equipment or mature technical solution in China that can systematically solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an online overall leveling construction method and device system for an electrolytic cell and a matching aluminum busbar, which can realize the safe lifting and leveling of the electrolytic cell body and the matching busbar under the premise of ensuring the continuous operation of the electrolytic cell.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: An online overall leveling construction method for an electrolytic cell and a matching aluminum busbar comprises the following steps: S1: Measure the height difference of the electrolytic cell body and the height difference with the relative benchmark elevation, and calculate the settlement value and lifting height; S2: Determine the jacking points of the electrolytic cell according to the position of the electrolytic cell foundation and the operation status, set 8-12 jacking points between the piers on the support beam A and the support beam B at the bottom of the cell shell, and set 1-3 jacking points at the bottom of both ends of the electrolytic cell; S3: Check the insulation condition of the electrolytic cell and insulate and fix the busbar at the bottom of the cell; S4: Measure the temperature around the electrolytic cell to be lifted and the temperature around the cathode steel rod; S5: Arrange the tank body lifting device, busbar lifting device and support beam tensioning device; S6: Arrange the tank levelness measuring device; S7: Use the tank lifting device to lift the electrolytic tank and insert thick steel plates and insulating materials until the determined relative reference elevation is reached; S8: Use the busbar lifting device to lift the busbar around the slot until it reaches the determined relative reference elevation.

[0007] Further: in step S2, the trough body lifting points on the support beam A and the support beam B are welded with reinforcement plates.

[0008] Further: step S2 also includes: setting two busbar lifting points on each busbar on the three surfaces of the flue end and the aluminum outlet end.

[0009] Further: in step S7, when the top of the electrolytic cell is about 20 mm higher than the adjacent cell body, the operation is stopped, and the adjacent electrolytic cells are lifted up, and the operation is performed in sequence, and the lifting is repeated back and forth multiple times.

[0010] Further: in step S8, when the lifting amount of the busbar around the slot is large, the busbars around the adjacent slots are lifted simultaneously and sequentially, and the lifting is repeated back and forth multiple times.

[0011] Further: in step S5, a group of support beam tensioning devices is arranged next to every two groups of tank body lifting devices.

[0012] The present invention also provides an electrolytic cell and a matching aluminum busbar online overall leveling device system using the above construction method, comprising: a cell body lifting device, a busbar lifting device, a support beam tensioning device and a cell body levelness measuring device; The tank body lifting device comprises a rectangular frame, a sleeper is arranged inside the rectangular frame, three height-adjustable movable rollers are arranged outside the rectangular frame, a steel cylinder is arranged on the upper part of the rectangular frame, an insulating material is arranged on the upper part of the steel cylinder, and a hydraulic jack is arranged on the upper part of the insulating material; The busbar lifting device includes a rectangular frame 2, wherein two sleepers are arranged inside the rectangular frame 2, a pair of movable rollers 2 are arranged outside the rectangular frame 2, a steel cylinder 2 is arranged on the upper part of the rectangular frame 2, an insulating material 2 is arranged on the upper part of the steel cylinder 2, and a hydraulic jack 2 is arranged on the upper part of the insulating material 2.

[0013] Furthermore: the support beam tensioning device includes: a positive and negative threaded bolt arranged in the middle, a welded steel pipe connected to both ends of the positive and negative threaded bolt respectively, and a steel section clamping device respectively arranged at the other end of the welded steel pipe; the steel section clamping device includes a fixing frame composed of steel plates and a tightening bolt installed on the fixing frame.

[0014] Furthermore: the trough levelness measuring device includes: three horizontal tubes, eight measuring tubes, a plurality of tees and crosses for connecting the horizontal tubes and the measuring tubes, and a movable bracket for fixing the measuring tubes; the horizontal tubes and the measuring tubes are transparent plastic tubes, and the movable bracket consists of a base plate and a column.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This device realizes the precise lifting of the electrolytic cell and the supporting busbar by configuring specially designed tank lifting device, busbar lifting device, support beam tensioning device and tank level measuring device. Among them, the tank lifting device and busbar lifting device adopt the design of insulating structure to ensure the electrical safety of the lifting process; the setting of support beam tensioning device effectively prevents the deformation and displacement of support beam during the lifting process; the level measuring device ensures the real-time monitoring and precise control of displacement during the lifting process.

[0016] Second, the present invention provides a scientific and reasonable construction step design, including accurate measurement in the early stage, reasonable arrangement of lifting points, and step-by-step lifting operations, so that the present invention can complete the overall leveling without stopping the electrolytic cell. In particular, by alternately lifting adjacent electrolytic cells, the stress concentration problem that may occur during the lifting process is avoided, and the construction safety is further improved.

[0017] 3. The present invention not only solves the problem of uneven settlement of the electrolytic cell foundation, but also can safely and efficiently complete the jacking and leveling operations while ensuring the continuous production of the electrolytic cell, providing a reliable technical guarantee for the safe production of the electrolytic aluminum industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a bottom view of the jacking structure at the bottom of the tank; Figure 2 It is a schematic side view of the tank body lifting structure; Figure 3 It is a bottom view schematic diagram of the busbar lifting structure; Figure 4 It is a schematic side view of an electrolytic cell and a matching aluminum busbar online integral leveling device of the present invention; Figure 5 It is a structural schematic diagram of the tank body lifting device; Figure 6It is a structural schematic diagram of the busbar lifting device; Figure 7 It is a structural schematic diagram of the support beam tensioning device; Figure 8 It is a structural schematic diagram of a tank levelness measuring device; In the figure: 1. Trough body; 2. Busbar around trough; 201. Flue end; 202. Aluminum outlet end; 203. Insulation board; 301. Support beam A; 302. Support beam B; 4. Trough body lifting device; 401. Rectangular frame 1; 402. Sleeper 1; 403. Moving roller 1; 404. Steel cylinder 1; 405. Insulation material 1; 406. Hydraulic jack 1; 5. Busbar lifting device; 501. Rectangular frame 2; 502. Sleeper 2; 50 3. Two moving rollers; 504. Two steel cylinders; 505. Two insulating materials; 506. Two hydraulic jacks; 6. Support beam tensioning device; 601. Clamping device; 6011. Fixing frame; 6012. Jacking bolts; 602. Welded steel pipe; 603. Positive and negative bolts; 7. Trough level measuring device; 701. Leveling tube; 702. Measuring tube; 703. Bottom plate; 704. Column; 8. Trough lifting point; 9. Busbar lifting point. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] The electrolytic cell and the matching aluminum busbar online overall leveling construction method provided by the present invention are suitable for solving the problem of uneven settlement of the electrolytic cell foundation. The electrolytic cell is the core equipment in the electrolytic aluminum production process, which mainly includes the cell shell, the cell lining, the cathode busbar around the cell, the upper structure, the anode busbar and other parts, and the total weight during operation can reach more than 380 tons. All of this weight is borne by the concrete foundation at the bottom of the cell shell, so there are quite high requirements for the foundation.

[0022] In one embodiment of the present invention, a device system for online overall leveling of an electrolytic cell and a matching aluminum busbar is provided, which includes the following parts: a cell body lifting device 4, a busbar lifting device 5, a support beam tensioning device 6, and a cell body horizontality measuring device 7.

[0023] like Figure 5 As shown, the tank body lifting device 4 is used for overall leveling of the electrolytic tank body 1, and includes a rectangular frame 401, in which a sleeper 402 is arranged. Three height-adjustable moving rollers 403 are arranged outside the rectangular frame 401, and these moving rollers 403 facilitate the movement and positioning of the device. A steel cylinder 404 is arranged on the upper part of the rectangular frame, and an insulating material 405 is arranged on the upper part of the steel cylinder 404, and a hydraulic jack 406 is arranged on the upper part of the insulating material. Through this structural design, stability and electrical safety during the lifting process can be ensured.

[0024] like Figure 6 As shown, the structural design of the busbar lifting device 5 is similar to that of the trough body lifting device 4, including a rectangular frame 501, sleepers 502, steel cylinders 504, insulating materials 505 and hydraulic jacks 506, but only a pair of movable rollers 503 are arranged on the outside of the rectangular frame 501. This design is more suitable for the special needs of busbar lifting.

[0025] like Figure 7 As shown, the function of the support beam tensioning device 6 is to prevent the support beam A301 and the support beam B302 from deforming and shifting when the electrolytic cell body 1 is lifted. The device includes a positive and negative threaded bolt 603 arranged in the middle, and each end of the positive and negative threaded bolt 603 is connected to a welded steel pipe 602. A steel clamping device 601 is arranged at the other end of the welded steel pipe 602. The clamping device 601 is composed of a fixing frame 6011 composed of a steel plate and a jacking bolt 6012 installed on the fixing frame 6011, which can effectively fix the support beam.

[0026] like Figure 8 As shown, the tank body level measuring device 7 is used to detect the levelness and lifting displacement of the electrolytic tank body 1, including three cross-connected horizontal pipes 701, eight measuring pipes 702, and a number of tees and crosses for connecting these pipes. The horizontal pipes 701 and the measuring pipes 702 are both made of transparent plastic pipes, which are convenient for observing the water level. The measuring pipe 702 is fixed by a movable bracket, which is composed of a bottom plate 703 and a column 704, and is made of dry wood to ensure insulation performance.

[0027] In another embodiment, the present invention further provides an online overall leveling construction method for an electrolytic cell and a matching aluminum busbar, the specific implementation process of which is as follows: First, the height difference of the inclination of the electrolytic cell body 1 of the entire electrolytic series and the height difference with the relative benchmark elevation are accurately measured and recorded, and the settlement value is calculated based on the measured data, and then the lifting height and the number of liftings are calculated. At the same time, according to the settlement value, a corresponding number of steel plate pads are prepared to fill the gap between the electrolytic cell and the supporting aluminum busbar after lifting and the foundation.

[0028] Secondly, determine the position of the jacking point. Figure 1-4 As shown, 12 tank body lifting points 8 are set in the middle of two piers on the bottom support beam A301 and the support beam B302 of the tank shell. These lifting points need to be welded with reinforcement plates to enhance the bearing capacity. Two tank body lifting points 8 are set at the bottom of each of the two ends of the electrolytic tank. For the lifting of the busbar 2 around the tank, the main lifting is the busbar at the tank end. Two busbar lifting points 9 are set for each busbar on the three surfaces of the tank end of the flue end 201 and the aluminum outlet end 202.

[0029] Before lifting, the insulation condition of the electrolytic cell needs to be fully checked. Use wooden wedges and insulating plates 203 to fix the bottom busbars of the cell to prevent the bottom busbars from contacting the cell body 1 and causing a short circuit during lifting. Add insulating plates 203 between the busbars 2 around the cell and between the busbars of the column 704 and the busbars 2 around the cell to prevent short circuits between the busbars.

[0030] Before lifting, the temperature around the electrolytic cell and the cathode steel bar should be measured, especially the temperature around the lifting point should be recorded. Temperature measurement is required during and after the lifting process. If abnormal temperature is found, the operator should be evacuated immediately.

[0031] When arranging various devices, the tank jacking device 4 and the busbar jacking device 5 should be kept stable and vertical, and insulating materials should be placed at the contact points with the tank 1 and the busbar. A set of support beam tensioning devices 6 should be set next to every two sets of tank jacking devices 4 to ensure the stability of the jacking process. At the same time, a horizontal measurement device is arranged, and a measurement point is set at each jacking point on the support beam A301 and the support beam B302 to monitor the jacking height in real time.

[0032] During the lifting operation, the tank lifting device 4 is first used to lift the electrolytic tank and insert the thick steel plate and insulating material 405. When the lifting height is about 20 mm higher than the adjacent tank body 1, the operation needs to be stopped and the adjacent electrolytic tank is lifted instead. The operation is performed sequentially and repeatedly until the relative reference elevation is reached. For the lifting of the busbar 2 around the tank, when the lifting amount is large, the adjacent busbars 2 around the tank need to be lifted at the same time, and the operation is performed sequentially and repeatedly until the required height is reached.

[0033] Through the coordinated use of the above-mentioned construction method and special equipment, the jacking and leveling operations can be completed safely and efficiently while ensuring the continuous production of the electrolytic cell, effectively solving the problems caused by the uneven settlement of the electrolytic cell foundation.

[0034] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An online overall leveling construction method for an electrolytic cell and a matching aluminum busbar, characterized in that: The following steps are involved: S1: Measure the height difference of the electrolytic cell body and the height difference with the relative benchmark elevation, and calculate the settlement value and lifting height; S2: Determine the jacking points of the electrolytic cell according to the position of the electrolytic cell foundation and the operation status, set 8-12 jacking points between the piers on the support beam A and the support beam B at the bottom of the cell shell, and set 1-3 jacking points at the bottom of both ends of the electrolytic cell; S3: Check the insulation condition of the electrolytic cell and insulate and fix the busbar at the bottom of the cell; S4: Measure the temperature around the electrolytic cell to be lifted and the temperature around the cathode steel rod; S5: Arrange the tank body lifting device, busbar lifting device and support beam tensioning device; S6: Arrange the tank levelness measuring device; S7: Use the tank lifting device to lift the electrolytic tank and insert thick steel plates and insulating materials until the determined relative reference elevation is reached; In step S7, when the top of the electrolytic cell is about 20 mm higher than the adjacent cell body, the operation is stopped, and the adjacent electrolytic cells are lifted up, and the operation is carried out in sequence, and the lifting is repeated back and forth for multiple times; S8: Use the busbar lifting device to lift the busbar around the slot until it reaches the determined relative reference elevation; In step S8, when the lifting amount of the busbar around the slot is large, the busbars around the adjacent slots are lifted simultaneously and sequentially, and the lifting is repeated back and forth for many times.

2. The construction method according to claim 1, characterized in that: In step S2, reinforcement plates are welded to the trough body lifting points on the support beam A and the support beam B.

3. The construction method according to claim 1, characterized in that: Step S2 also includes: setting two busbar lifting points on each busbar on the three surfaces of the flue end and the aluminum outlet end.

4. The construction method according to claim 1, characterized in that: In step S5, a group of support beam tensioning devices is arranged next to every two groups of tank body lifting devices.

5. A device system for online overall leveling of an electrolytic cell and its matching aluminum busbar, characterized in that: The construction method according to any one of claims 1 to 4 above comprises: a trough body lifting device, a busbar lifting device, a support beam tensioning device and a trough body level measuring device; The tank body lifting device comprises a rectangular frame, a sleeper is arranged inside the rectangular frame, three height-adjustable movable rollers are arranged outside the rectangular frame, a steel cylinder is arranged on the upper part of the rectangular frame, an insulating material is arranged on the upper part of the steel cylinder, and a hydraulic jack is arranged on the upper part of the insulating material; The busbar lifting device includes a rectangular frame 2, wherein two sleepers are arranged inside the rectangular frame 2, a pair of movable rollers 2 are arranged outside the rectangular frame 2, a steel cylinder 2 is arranged on the upper part of the rectangular frame 2, an insulating material 2 is arranged on the upper part of the steel cylinder 2, and a hydraulic jack 2 is arranged on the upper part of the insulating material 2.

6. The device system according to claim 5, characterized in that: The support beam tensioning device includes: positive and negative threaded bolts arranged in the middle, welded steel pipes respectively connected to the two ends of the positive and negative threaded bolts, and steel section clamping devices respectively arranged at the other ends of the welded steel pipes; the steel section clamping device includes a fixing frame composed of steel plates and a tightening bolt installed on the fixing frame.

7. The device system according to claim 5, characterized in that: The tank levelness measuring device comprises: three cross-connected horizontal tubes, eight measuring tubes, a plurality of tees and crosses for connecting the horizontal tubes and the measuring tubes, and a movable bracket for fixing the measuring tubes; the horizontal tubes and the measuring tubes are transparent plastic tubes, and the movable bracket consists of a base plate and a column.

Images