Aluminum electrolysis cell shell correcting device

Abstract

The utility model relates to an aluminum electrolysis cell shell correcting device which comprises a long side plate deformation correcting assembly, a cell shell end upwarp correcting assembly and a cell shell bottom plate deformation correcting assembly. The left end and the right end of the correction supporting beam are detachably connected with stress lugs used for being located and inserted into wall plate steel windows in long side plates of the shell on the corresponding sides. The shell bottom plate deformation correction assembly further comprises a correction jack used for being supported between the correction supporting beam and the shell bottom plate. The groove shell end upwarp correction assembly comprises a correction support used for being supported at the bottom of a groove shell bottom plate, and further comprises a front side correction balance weight used for exerting pressure on the portion, on the front side of the correction support, of the groove shell and a rear side correction balance weight used for exerting pressure on a groove opening in the rear side of the correction support. The utility model provides the correction device for the cell shell of the aluminum electrolysis cell, which can correct the upwarp deformation of the end part of the aluminum electrolysis cell and the deformation of the bottom plate of the cell shell.

Description

Technical Field

[0001] The utility model relates to a deformation repair device for a tank shell of an aluminum electrolytic cell, in particular to a tank shell correction device for an aluminum electrolytic cell. Background Art

[0002] Electrolytic aluminum is aluminum obtained by electrolysis in an aluminum electrolytic cell. Modern electrolytic aluminum industry production often adopts cryolite-alumina molten salt electrolysis method. Molten cryolite is the solvent, alumina is the solute, carbonite is the anode, and aluminum liquid is the cathode. After a strong direct current is passed through, an electrochemical reaction, i.e. electrolysis, takes place at the two electrodes in the electrolytic cell at 950℃-970℃.

[0003] Aluminum electrolytic cell is a key equipment in the production of electrolytic aluminum. Aluminum electrolytic cell includes a cell shell extending in the front-to-back direction. The cell shell includes cell shell side plates and cell shell bottom plates. The cell shell side plates include long side plates of the shell arranged at intervals on the left and right and short side plates of the shell arranged at intervals on the front and back. The long side plates of the shell are provided with wall plate steel windows. The cell shell bottom plate is placed on the cradle. A cathode lining is provided on the inner wall of the cell shell.

[0004] During the production of electrolytic cells, the temperature in the middle is higher than that at both ends, especially in winter. Some electrolytic plants will take winter insulation measures, but they still cannot prevent the existence of this temperature difference. This temperature difference will cause the cathode lining to be unevenly stressed at the corresponding position, causing the two ends of the cell shell to warp up. If the cell is started and stopped at this time, coupled with the outer bow of the long side plate, the deformation of the cell shell will be more obvious. At this time, it can be observed that there is a gap between some cradles and the bottom plate of the cell shell, that is, at this time, part of the cradle is not stressed.

[0005] The deformation of the tank shell is caused by many comprehensive reasons. The main reason is that the tank shell is heated unevenly during roasting startup or normal production, resulting in excessive local stress. The deformation cannot be restored in time and eventually causes permanent deformation. In the original design, there is a circle of reinforcing belts on the upper part of the tank shell to prevent the influence of expansion stress on both sides of the tank lining during production. In actual production, this expansion stress causes the long side plates of the shell to expand and tilt outward. When the stress is too large, it will deform together with the outer belt. There are many reinforcing panels at both ends of the tank shell, and the stress span is smaller than the long side plates of the shell, so the ends are basically not involved in the correction, and the long side plates of the shell are the focus of correction.

[0006] In summary, due to various reasons, the long side panels of the shell are bowed outward, the ends of the tank shell are upturned, and the bottom plate of the tank shell is uneven. These are common defects of the tank shell in aluminum electrolysis production, so the tank shell needs to be corrected regularly. In the prior art, there are no special correction tools, the treatment effect is not obvious, the manpower and material resources are large, the correction period is long and the cost is high, which seriously troubles the tank overhaul work of various electrolytic plants. Most companies take the measure of directly replacing the entire tank shell, which does have a good overhaul effect, but the large overhaul investment and long construction period also seriously affect the production efficiency of the company. Some companies do not even correct the tank shell, do not consider the deformation of the tank shell, and directly build the cathode lining. In the end, there are also undesirable phenomena such as poor indicators after the overhaul tank is started, easy leakage, and short life. Utility Model Content

[0007] The utility model aims to provide a tank shell correction device for an aluminum electrolytic cell which can correct the upward deformation of the end of the aluminum electrolytic cell and the deformation of the tank shell bottom plate.

[0008] In order to solve the above technical problems, the technical solution of a tank shell correction device for an aluminum electrolytic cell in the utility model is as follows:

[0009] A tank shell correction device for an aluminum electrolytic cell comprises a long side plate deformation correction component, a tank shell end warping correction component and a tank shell bottom plate deformation correction component, the tank shell bottom plate deformation correction component comprises a correction support beam whose length extends in the left-right direction, the left and right ends of the correction support beam are detachably connected with force ears for positioning and inserting in the wall plate steel windows on the corresponding side shell long side plates, the bottom of the correction support beam is provided with support beam running wheels, the shell bottom plate deformation correction component also comprises a correction jack for supporting between the correction support beam and the shell bottom plate; the tank shell end warping correction component comprises a correction support for supporting the bottom of the tank shell bottom plate, and the tank shell end warping correction component also comprises a front side correction counterweight for applying pressure to the tank shell in front of the correction support and a rear side correction counterweight for applying pressure to the notch on the rear side of the correction support.

[0010] Furthermore, the trough shell correction device also includes a long side plate correction assembly, and the long side plate deformation correction assembly includes an upper puller and a lower puller, the lower puller includes a left-side tension member of the lower puller and a right-side tension member of the lower puller connected to the lower end of the corresponding shell long side plate, and the lower puller also includes a lower hand winch for pulling the left-side tension member of the lower puller and the right-side tension member of the lower puller; the upper puller includes a left-side tension member of the upper puller and a right-side tension member of the upper puller connected to the upper end of the corresponding shell long side plate, and the lower puller also includes an upper hand winch for pulling the left-side tension member of the upper puller and the right-side tension member of the upper puller.

[0011] Furthermore, a left-side card slot with an opening facing downward is provided on the left-side tension member of the upper puller, and the left-side card slot is used to be clamped on the upper end of the long side plate of the left shell from top to bottom; a right-side card slot with an opening facing downward is provided on the right-side tension member of the upper puller, and the right-side card slot is used to be clamped on the upper end of the long side plate of the right shell from top to bottom.

[0012] Furthermore, the left-side tension member of the lower puller includes a left-side load-bearing plate, and a left-side load-bearing ring is fixed to the right end of the left-side load-bearing plate for passing through the corresponding wall panel steel window from left to right; the right-side tension member of the lower puller includes a right-side load-bearing plate, and a right-side load-bearing ring is fixed to the left end of the right-side load-bearing plate for passing through the corresponding wall panel steel window from right to left.

[0013] Furthermore, the load-bearing ear is connected to the end of the correction support beam by bolts.

[0014] Furthermore, the left and right ends of the correction support beam are respectively provided with a left leg of the right support beam and a right leg of the support beam, and the support beam walking wheels are provided at the bottom of the left and right legs of the support beam.

[0015] Furthermore, the weight of the front correction weight is greater than that of the rear correction weight, and the bottom of the front correction weight is used to apply pressure to the upper ends of the long side plates of the left shell and the right shell, and the bottom of the rear correction weight is used to apply pressure to the upper end of the bottom plate of the trough shell.

[0016] Furthermore, the weight of the front correction weight is 20 tons, and the weight of the rear correction weight is 5 tons.

[0017] The beneficial effects of the utility model are as follows: in the utility model, the end upward deformation, the deformation of the trough shell bottom plate and the deformation of the long side plate of the shell are corrected by the trough shell end upward correction component, the trough shell bottom plate deformation correction component and the long side plate deformation correction component respectively. Taking the trough shell bottom plate deformation correction as an example, the stress ear is positioned and inserted into the wall plate steel window on the corresponding side long side plate of the shell, and then the correction support beam is fixed to the stress ear, and the correction support beam is fixed relative to the trough shell in the up and down directions. The correction jack uses the correction support beam as a reaction force support to correct the deformed convex part of the trough shell bottom plate, and the position of the correction jack can be moved left and right to change the left and right correction position. When it is necessary to move forward and backward to change the correction position, the stress ear is removed, and the correction support beam is moved forward and backward by the support beam walking wheel, and then the stress ear is installed into the corresponding wall plate steel window. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 This is a diagram of the use state of the tank shell bottom plate deformation correction component in one embodiment of the tank shell correction device of an aluminum electrolytic tank in the utility model;

[0020] Figure 2 yes Figure 1 Schematic diagram of the coordination between the center correction support beam and the correction jack;

[0021] Figure 3 yes Figure 2 AA section view in the figure;

[0022] Figure 4 This is a diagram of the use state of the tank shell end upward warping correction component in one embodiment of the utility model;

[0023] Figure 5 yes Figure 4 A schematic diagram of the structure of the middle front side correction weight;

[0024] Figure 6 yes Figure 4 A schematic diagram of the structure of the middle and rear correction weight;

[0025] Figure 7 yes Figure 6 A top view of

[0026] Figure 8 This is a diagram of the use state of the long side plate deformation correction component in one embodiment of the utility model;

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Correction support beam; 2. Load-bearing ear; 3. Left leg of support beam; 4. Right leg of support beam; 5. Travel wheel of support beam; 6. Correction jack; 7. Bolt penetration hole of support beam; 8. Long side plate of shell; 9. Bottom plate of trough shell; 10. Steel window of wall panel; 11. Front correction counterweight; 12. Rear correction counterweight; 13. Correction support; 14. Lifting hole; 15. Steel plate; 16. Weight bracket; 17. Weight; 18. Long side plate of left shell; 19. Long side plate of right shell; 20. Left tension member of upper puller; 21. Right tension member of upper puller; 22. Left tension member of lower puller; 23. Right load-bearing plate; 24. Right load-bearing ring; 25. Left slot. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Before introducing the utility model, a brief introduction to the aluminum electrolytic cell of the prior art is first given. The aluminum electrolytic cell includes a slot shell extending in the front-to-back direction, the slot shell includes slot shell side plates and a slot shell bottom plate 9 fixed to the bottom of the slot shell side plates, wherein the slot shell side plates on the left and right sides are long shell side plates 8, and the shell side plates on the front and back sides are short shell side plates. The length of the long shell side plates is longer than that of the short shell side plates, and the short of the long shell side plates and the short shell side plates is relative. The length of the slot shell side plates on the left and right sides is longer than that of the slot shell side plates on the front and back sides. Therefore, the slot shell side plates on the left and right sides are called long shell side plates, and the shell side plates on the front and back sides are called short shell side plates. A plurality of wall plate steel windows 10 arranged at intervals along the front-to-back direction are provided on the side walls of the long shell side plates.

[0031] The utility model is an embodiment of a correction device for aluminum electrolytic cell shell. Figures 1 to 8 As shown: it includes a long side plate deformation correction component, a trough shell end upward correction component and a trough shell bottom plate deformation correction component.

[0032] The deformation correction assembly of the bottom plate of the tank shell includes a correction support beam 1 whose length extends in the left-right direction. The left and right ends of the correction support beam 1 are detachably connected with a force-bearing ear 2 for positioning and inserting in the wall plate steel window on the long side plate of the corresponding side shell. In this embodiment, two support beam bolt through holes 7 are respectively provided at both ends of the correction support beam, and a force-bearing ear bolt through hole is provided on the force-bearing ear. The force-bearing ear and the correction support beam are detachably connected by inserting bolts in the support beam bolt through hole and the force-bearing ear bolt through hole. The bottom surface of the force-bearing ear is an inclined surface, which facilitates the force-bearing ear to extend into the corresponding wall plate steel window in the left-right direction.

[0033] The bottom of the correction support beam is provided with a support beam running wheel 5, and the shell bottom plate deformation correction assembly also includes a correction jack 6 for supporting between the correction support beam and the shell bottom plate. Specifically, the left end and the right end bottom of the correction support beam are respectively provided with a right support beam left leg 3 and a support beam right leg 4, and the support beam running wheel 5 is provided at the bottom of the left support beam leg and the right support beam leg. The correction jack 6 is a manual hydraulic jack, and the correction jack is independently provided with the correction support beam.

[0034] The upward warping correction assembly for the end of the trough shell includes a correction support 13 for supporting the bottom of the bottom plate of the trough shell. The upward warping correction assembly for the end of the trough shell also includes a front correction counterweight 11 for applying pressure to the trough shell on the front side of the correction support and a rear correction counterweight 12 for applying pressure to the notch on the rear side of the correction support.

[0035] In this embodiment, the correction support 13 is composed of a plurality of steel gaskets stacked in sequence in the up-down direction. The weight of the front correction counterweight is greater than that of the rear correction counterweight. The bottom of the front correction counterweight is used to press the upper ends of the left and right long side plates of the housing, and the bottom of the rear correction counterweight is used to press the upper end of the tank shell bottom plate. The weight of the front correction counterweight is 20 tons, and the weight of the rear correction counterweight is 5 tons.

[0036] The front correction counterweight includes a counterweight base welded from steel plates, and a hanging hole 14 is provided at the upper end of the counterweight base. The rear correction counterweight includes a weight bracket 16, on which two 2.5-ton weights 17 are mounted, and the weights 17 are cast iron blocks, and a hanging hole is provided at the upper end of the weight bracket.

[0037] The long side plate deformation correction assembly includes an upper puller and a lower puller. The lower puller includes a left-side tension member 22 of the lower puller and a right-side tension member of the lower puller for connecting to the lower end of the long side plate of the corresponding side shell, and the lower puller also includes a lower hand winch (not shown in the figure) for pulling the left-side tension member of the lower puller and the right-side tension member of the lower puller; the upper puller includes a left-side tension member 20 of the upper puller and a right-side tension member 21 of the upper puller for connecting to the upper end of the long side plate of the corresponding shell, and the lower puller also includes an upper hand winch (not shown in the figure) for pulling the left-side tension member of the upper puller and the right-side tension member of the upper puller.

[0038] In this embodiment, a left-side card slot 25 with an opening facing downward is provided on the left-side tension member of the upper puller, and the left-side card slot is used to be clamped on the upper end of the long side plate of the left shell from top to bottom; a right-side card slot with an opening facing downward is provided on the right-side tension member of the upper puller, and the right-side card slot is used to be clamped on the upper end of the long side plate of the right shell from top to bottom.

[0039] The left tension member of the lower puller includes a left load-bearing plate, and a left load-bearing ring is fixed to the right end of the left load-bearing plate for passing through the corresponding wall panel steel window from left to right; the right tension member of the lower puller includes a right load-bearing plate 23, and a right load-bearing ring is fixed to the left end of the right load-bearing plate for passing through the corresponding wall panel steel window from right to left.

[0040] Correction of the outer bow deformation of the long side plate of the shell: Figure 8As shown, the upper and lower pullers are used when correcting the long side panels of the shell. Before correction, other components that cause deformation need to be removed, such as the enclosures, reinforcement ribs and other components of the long side panels of the shell. Here, the enclosures and reinforcement plates at the deformed parts need to be cut off. Two pullers are used at the upper and lower ends of the long side panels of the shell. The force ring of the lower puller is extended into the hole of the corresponding steel window. The load-bearing plate is matched with the outer wall of the long side panel of the shell. The 5T hand chain hoist is hung on the force ring of the puller. The hand chain hoist applies a certain tension to restore the wall panel to its original size. The upper puller is used to correct the deformation of the upper end of the long side panel of the shell. After removing the enclosure, the puller hook is stuck in the selected position. The 5T hand chain hoist is hung on the force ring of the puller. After applying a certain tension, the long side panel of the shell can be heated to 600-700℃ by local baking, and then naturally cooled. After replacing the local enclosure, the tension of the puller is removed. If the deformation range is relatively large, the number of pullers can be appropriately increased. In order to avoid over-correction, it is necessary to set up support rods at appropriate positions inside the tank shell.

[0041] Correction of the warping of the two ends of the tank shell: Figure 4 As shown, set the correction support at point M, hoist the 20t front correction weight and the 5t rear correction weight to the designated position, and do it at both ends simultaneously. The pressure correction time is not less than 24 hours. If the deformation is too large, the wall panels can be heated and baked within a certain range on both sides of the dotted line MN. When baking, select the V-shaped area. In actual operation on site, it is usually carried out simultaneously with the correction of the long side panels of the shell. First remove the enclosure that needs to be cut off, then hoist the weight to apply pressure, then pull the puller, bake the wall panels, replace the enclosure, remove the weight, and test the correction effect.

[0042] Correction of tank shell bottom plate deformation: Figure 1 As shown, there are two stress ears at both ends of the correction support beam that can support the inner hole of the steel window of the wall plate. A 32t correction jack is placed at the bottom of the crossbeam welded by steel plates. Below the correction jack is the upward bulging bottom plate of the trough shell. When the correction jack is pressed and the top rod of the correction jack is extended, the bulging part can be squeezed downward. Before the correction starts, it is necessary to loosen and remove the fastening bolts of the cradle frame at the corresponding position to reserve enough over-deformation space below the squeezed position. When the pressure of the correction jack is removed, the deformation of the bottom plate rebounds and can be in the best position. In order to eliminate stress, we usually take measures to heat and bake the compressed parts. Only the upward bulging position of the bottom plate is processed, and the sunken position is not processed, because the leveling layer at the bottom of the inner lining can make up for the sunken size of the bottom plate. The bulging size will affect the thickness of the leveling layer and even cause the laying of calcium silicate board.

[0043] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0044] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0045] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A tank shell correction device for an aluminum electrolysis cell, characterized in that: It includes a long side plate deformation correction component, a trough shell end upward warping correction component and a trough shell bottom plate deformation correction component. The trough shell bottom plate deformation correction component includes a correction support beam whose length extends in the left and right directions. The left and right ends of the correction support beam are detachably connected with force ears for positioning and inserting in the wall plate steel windows on the corresponding side shell long side plates. The bottom of the correction support beam is provided with support beam walking wheels. The shell bottom plate deformation correction component also includes a correction jack for supporting between the correction support beam and the shell bottom plate; the trough shell end upward warping correction component includes a correction support for supporting the bottom of the trough shell bottom plate, and the trough shell end upward warping correction component also includes a front side correction counterweight for applying pressure to the trough shell on the front side of the correction support and a rear side correction counterweight for applying pressure to the notch on the rear side of the correction support.

2. The aluminum electrolysis cell shell correction device according to claim 1, characterized in that: The long side plate deformation correction assembly includes an upper puller and a lower puller, the lower puller includes a left-side tension member of the lower puller and a right-side tension member of the lower puller connected to the lower end of the corresponding shell long side plate, and the lower puller also includes a lower hand winch for pulling the left-side tension member of the lower puller and the right-side tension member of the lower puller; the upper puller includes a left-side tension member of the upper puller and a right-side tension member of the upper puller connected to the upper end of the corresponding shell long side plate, and the lower puller also includes an upper hand winch for pulling the left-side tension member of the upper puller and the right-side tension member of the upper puller.

3. The aluminum electrolysis cell shell correction device according to claim 2, characterized in that: A left-side card slot with an opening facing downwards is provided on the left-side tension member of the upper puller, and the left-side card slot is used to be clamped on the upper end of the long side plate of the left shell from top to bottom; a right-side card slot with an opening facing downwards is provided on the right-side tension member of the upper puller, and the right-side card slot is used to be clamped on the upper end of the long side plate of the right shell from top to bottom.

4. The aluminum electrolysis cell shell correction device according to claim 2, characterized in that: The left side tension member of the lower puller includes a left side load-bearing plate, and a left side load-bearing ring is fixed to the right end of the left side load-bearing plate for passing through the corresponding wall panel steel window from left to right; the right side tension member of the lower side puller includes a right side load-bearing plate, and a right side load-bearing ring is fixed to the left end of the right side load-bearing plate for passing through the corresponding wall panel steel window from right to left.

5. The aluminum electrolysis cell shell correction device according to claim 1, characterized in that: The load ears are connected to the ends of the correction support beams by bolts.

6. The aluminum electrolysis cell shell correction device according to claim 1, characterized in that: The left and right bottom ends of the correction support beam are respectively provided with a left support leg of the right support beam and a right support leg of the support beam, and the travel wheels of the support beam are provided at the bottom of the left support leg of the support beam and the right support leg of the support beam.

7. The aluminum electrolysis cell shell correction device according to any one of claims 1 to 6, characterized in that: The weight of the front correction weight is greater than that of the rear correction weight. The bottom of the front correction weight is used to apply pressure to the upper ends of the left and right long side plates of the shell body, and the bottom of the rear correction weight is used to apply pressure to the upper end of the bottom plate of the tank shell.

8. The aluminum electrolysis cell shell correction device according to claim 7, characterized in that: The weight of the front correction weight is 20 tons, and the weight of the rear correction weight is 5 tons.

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