Device for hoisting cell shell of aluminum electrolysis cell and use method of device

Abstract

The invention provides a device for hoisting an aluminum electrolysis cell shell and a using method of the device, belongs to the technical field of electrolysis cell shell hoisting, and solves the problem of potential safety hazards caused by unhooking of a cell shell and hoisting appliances during traditional electrolysis cell hoisting. The device comprises two hoisting appliances, arc-shaped grooves are formed in the side edges of the hoisting appliances, and small holes and large holes are formed in the hoisting appliances; the small holes are connected with steel wire ropes, and a blocking pipe is arranged between the two large holes in a sleeved mode. The method further comprises the following steps that the small holes of the two lifting appliances are connected with steel wire ropes on the two sides of the cell shell respectively, the steel wire ropes abut against the arc wrap angles, the large holes of the two lifting appliances are placed on the inner side of the cell shell cathode window, and a blocking pipe is arranged between the two large holes in a penetrating mode; and the two lifting points on the same side of the tank shell are lifted to be balanced and consistent in height, and tank shell lifting is carried out. The lifting appliance is high in practicability, convenient to manufacture, not prone to damage and long in service life, the risk of unhooking of the lifting appliance is fundamentally and thoroughly solved through design and use of the lifting appliance, the lifting method is safe and reliable, and use is convenient, fast and efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of electrolytic cell shell hoisting, and in particular relates to a device for hoisting an aluminum electrolytic cell shell and a use method thereof. Background Art

[0002] During the overhaul of the aluminum electrolytic cell shell, online maintenance is greatly affected by the magnetic field, and the welding quality cannot be guaranteed. It needs to be lifted off the production line for maintenance. During the lifting process, the electrolytic cell shell is heavy, and there is a great risk of lifting when it is lifted over the operating electrolytic cell. In most old electrolytic series, the multifunctional overhead crane is lifted by a relatively fixed electric hoist. The electrolytic cell shell has a large tonnage, and the lifting must be carried out by two multifunctional overhead cranes. Ordinary plate hook slings are used on the cathode windows at four points of the cell shell, and the lifting is achieved by the four-point simultaneous lifting method. In the actual lifting process of this method, the lifting height and tightness of the four hooks are difficult to guarantee. After the cell shell is lifted, when the height is adjusted up and down or the trolley is not moving synchronously, the ordinary plate hook sling is at risk of being unhooked as it is pulled. The present invention aims to solve the safety risk of the sling being unhooked from the cell shell during the lifting process. Summary of the invention

[0003] The purpose of the present invention is to provide a device for hoisting the shell of an aluminum electrolytic cell and a method for using the device, so as to solve the problem of potential safety hazards caused by the shell being unhooked from the hoisting device during the traditional hoisting of the electrolytic cell.

[0004] The technical solution of the present invention is: a device for lifting the shell of an aluminum electrolytic cell, the shell of the aluminum electrolytic cell comprising a cathode window, a long side plate of the shell and an upper edge of the shell, the cathode window is arranged on the long side plate of the shell, a shell wing plate is extended outside the long side plate of the shell, and the device comprises two hangers, an arc-shaped groove is arranged on the side of the hanger, the arc-shaped groove is abutted against the upper edge of the cathode window, a small hole and a large hole are respectively arranged at the upper and lower positions of the hanger, a steel wire rope is connected to the small hole, a retaining tube is sleeved between the large holes of the two hangers, and both ends of the retaining tube are abutted against the inner edge of the cathode window.

[0005] As a further improvement of the present invention, latches are respectively provided at both ends of the retaining tube, and the two hangers are located between the two latches.

[0006] As a further improvement of the present invention, the small hole is connected to the wire rope through a shackle.

[0007] As a further improvement of the present invention, an arc corner is provided at the end of the wing plate of the groove shell, and the arc corner is connected to a corner hook through a chain, and the corner hook is hung at the upper edge of the groove shell.

[0008] A method for using a device for hoisting a shell of an aluminum electrolytic cell, comprising the following steps: Step 1: Connect devices for lifting the aluminum electrolytic cell shell on both sides of the cell shell to set them as lifting points, connect the small holes of the two lifting tools to the steel wire ropes through shackles at each lifting point, connect the two steel wire ropes to the crane hook, make the steel wire ropes and the arc wrap angles against each other, place the large holes of the two lifting tools on the inner side of the cathode window of the cell shell, make the arc groove against the upper edge of the cathode window, then pass a retaining tube between the two large holes, and insert pins at both ends of the retaining tube; Step 2: Use the two hooks on a crane to lift the two lifting points on the same side of the tank shell to the same balanced height, and then operate the two cranes at the same time to lift the tank shell.

[0009] The beneficial effects of the present invention are as follows: a sling is designed through the trough shell window structure, the sling is connected to the wire rope, one end of the sling with a large hole passes through the inner side of the cathode window of the trough shell from the outside, passes through the two large holes of the sling through the blocking tube, and blocks the inner edges on both sides of the cathode window, so that the sling maintains sufficient strength during lifting. Compared with the traditional lifting method of directly clamping the plate hook sling on the cathode window, the arc-shaped groove can effectively protect the trough shell window from deformation; to prevent the blocking tube from displacement, corresponding pins are inserted on both sides of the blocking tube to play a role of limiting and fixing; to ensure that the wire rope is not worn and sheared by the upper wing plate of the trough shell during use, a semi-arc wrap angle is made at the wing plate, and is fixed to the upper edge of the trough shell by a chain and a hook, so as to prevent the arc wrap angle tube from falling.

[0010] The present invention mainly solves the problem of decoupling of the electrolytic cell shell and the lifting sling during the lifting of the electrolytic cell shell. Through the present method, whether it is lifted by two overhead cranes or one overhead crane, the problem of decoupling during lifting is completely solved. Compared with the traditional lifting method, the present invention has the advantages of reliable lifting and not easy to decouple, which increases safety and ensures the effective operation of the operation. The present invention is highly practical, easy to manufacture, not easy to damage, and has a long service life. Through the design and use of the present invention, the risk of decoupling of the sling is fundamentally and completely solved, and the lifting method is safe and reliable, and it is convenient and efficient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of the structure of the present invention; Figure 2 It is a side view of the structure of the present invention; Figure 3 It is a schematic diagram of the structure of the sling in the present invention; Figure 4 This is a front view of the lifting installation of the present invention; Figure 5 It is a top view of the lifting point of the present invention.

[0012] In the figure: 1-tank shell; 2-pipe stop; 3-hanging device; 31-small hole; 32-large hole; 33-arc groove; 4-long side plate of tank shell; 5-wire rope; 6-arc corner; 7-chain; 8-corner hook; 9-cathode window; 10-latch; 11-shackle; 12-overhead crane hook head; 13-tank shell wing plate; 14-tank shell upper edge; 15-No. 1 hook of overhead crane; 16-No. 2 hook of overhead crane; 17-No. 1 hook of overhead crane; 18-No. 2 hook of overhead crane; 19-No. 1 lifting point; 20-No. 2 lifting point; 21-No. 3 lifting point; 22-No. 4 lifting point. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] like Figure 1-Figure 3 As shown, a device for lifting the shell of an aluminum electrolytic cell, the shell of the aluminum electrolytic cell includes a cathode window 9, a long side plate 4 of the shell and an upper edge 14 of the shell, the cathode window 9 is opened on the long side plate 4 of the shell, and a shell wing plate 13 extends outside the long side plate 4 of the shell, including two hangers 3, the sides of the hangers 3 are provided with an arc groove 33, the arc groove 33 is against the upper edge of the cathode window 9, the hangers 3 are respectively provided with a small hole 31 and a large hole 32 at the upper and lower positions, the small hole 31 is connected to a steel wire rope 5, and a retaining tube 2 is sleeved between the large holes 32 of the two hangers 3, and the two ends of the retaining tube 2 are against the inner edge of the cathode window 9.

[0015] Pins 10 are respectively disposed at both ends of the retaining tube 2 , and the two hangers 3 are located between the two pins 10 .

[0016] The small hole 31 is connected to the wire rope 5 via the shackle 11 .

[0017] The end of the groove shell wing plate 13 is provided with an arc corner 6, and the arc corner 6 is connected to a corner hook 8 through a chain 7, and the corner hook 8 is hung on the upper edge 14 of the groove shell.

[0018] The method of using the device comprises the following steps: Step 1: Connect the device to both sides of the tank shell 1 as hanging points, connect the small holes 31 of the two slings 3 to the wire ropes 5 through the shackles 11 at each hanging point, connect the two wire ropes 5 to the crane hook 12, abut the wire ropes 5 against the arc wrap angle 6, place the large holes 32 of the two slings 3 on the inner side of the cathode window 9 of the tank shell, make the arc groove 33 abut against the upper edge of the cathode window 9, then pass the retaining tube 2 between the two large holes 32, and insert the latches 10 at both ends of the retaining tube 2; Step 2: Use two hooks on an overhead crane to lift two lifting points on the same side of the tank shell 1 to a balanced height, and then operate the two overhead cranes at the same time to lift the tank shell 1.

[0019] Embodiment 1, According to the size of the cathode window 9 of the suspended tank shell 1 and the overall tonnage of the tank shell 1, a steel plate with a thickness matching the material and load of the sling 3 is selected, the sling 3 is designed to be a gourd ring, and small holes 31, large holes 32 and arc grooves 33 are cut and processed. According to the tonnage, a shackle 11 and a wire rope 5 of corresponding load are selected, and the diameter and braiding method requirements of the wire rope 5 are mainly determined.

[0020] The length of the retaining tube 2 is determined according to the size between the two cathode windows 9. The length of the retaining tube 2 is 2.5 times the center distance between the two cathode windows 9. Holes are drilled at both ends of the retaining tube 2. The hole positions are calculated from the center of the total length of the retaining tube 2 to both sides. The length of the hole is half of the center distance between the two cathode windows 9 plus 1.5 times the size of a single cathode window 9. The diameter of the hole drilled is 16 mm. Two pins 10 are made for each retaining tube 2. The length of the pin 10 is twice the diameter of the retaining tube 2. One end of the pin 10 is bent 90° to better fix the pin 10 to the hole.

[0021] The arc corner 6 uses a pipe with a diameter of 80mm, a wall thickness of 5mm and a length of 350mm. It is divided into two halves from the middle in the axial direction of the pipe, and a chain 7 and an angle hook 8 of appropriate length are welded to connect them. The angle hook 8 is hung on the upper edge 14 of the trough shell, and the arc corner 6 is placed on the edge of the trough shell wing plate 13 to protect the wire rope 5.

[0022] like Figure 4-Figure 5 As shown, the two sides of the tank shell 1 are connected to the device as hanging points, namely, No. 1 hanging point 19, No. 2 hanging point 20, No. 3 hanging point 21 and No. 4 hanging point 22. After the above components are processed, the components are installed at each hanging point, and the small holes 31 of the two pairs of hangers 3 are connected to the wire rope 5 respectively with the shackles 11, and one end of the large holes 32 of the two pairs of hangers 3 is placed from the outside of the tank shell 1 to the inside of the cathode window 9, and a blocking hole is inserted between the large holes 32 of the two pairs of hangers 3. Tube 2, insert the pins 12 at both ends of the retaining tube 2, and the retaining tube 2 is subjected to force as it is lifted, close to the inner edge of the cathode window 9, that is, the side wall of the long side plate 4 of the tank shell, and the other end of the wire rope 5 is hung inside the hook head 12 of the crane, the No. 1 hook 15 of the No. 1 crane is connected to the No. 1 lifting point 19, the No. 2 hook 16 of the No. 1 crane is connected to the No. 2 lifting point 20, the No. 1 hook 17 of the No. 2 crane is connected to the No. 4 lifting point 22, and the No. 2 hook 18 of the No. 2 crane is connected to the No. 3 lifting point 21, so that single-point lifting can be realized.

[0023] During lifting, first direct the two fixed lifting points connected to one overhead crane, namely, lifting point No. 19 and lifting point No. 20, to be lifted to a consistent height balance, then direct the two fixed lifting points connected to another overhead crane, namely, lifting point No. 31 and lifting point No. 42, to be lifted to a consistent height balance, finally direct the two overhead cranes to operate the lifting hooks up and down at the same time, so that the trough shell 1 is about 50mm away from the bottom I-beam, and try lifting up and down 2-3 times. After confirming that there is no error, start directing the lifting according to the lifting height and speed requirements.

Claims

1. A device for hoisting a tank shell of an aluminum electrolytic cell, wherein the tank shell of the aluminum electrolytic cell comprises a cathode window, a long side plate of the tank shell and an upper edge of the tank shell, wherein the cathode window is provided on the long side plate of the tank shell, and a tank shell wing plate extends outside the long side plate of the tank shell, wherein: The invention comprises two hangers (3), wherein an arc-shaped groove (33) is provided on the side of the hangers (3), the arc-shaped groove (33) abuts against the upper edge of the cathode window (9), a small hole (31) and a large hole (32) are respectively opened at the upper and lower positions of the hangers (3), a steel wire rope (5) is connected to the small hole (31), and a retaining tube (2) is sleeved between the large holes (32) of the two hangers (3), and the two ends of the retaining tube (2) abut against the inner edge of the cathode window (9).

2. The device for hoisting the shell of an aluminum electrolytic cell according to claim 1, characterized in that: The two ends of the retaining tube (2) are respectively provided with latches (10), and the two hanging devices (3) are located between the two latches (10).

3. A device for hoisting the shell of an aluminum electrolytic cell according to claim 1 or 2, characterized in that: The small hole (31) is connected to the steel wire rope (5) via a shackle (11).

4. The device for hoisting the shell of an aluminum electrolytic cell according to claim 1, characterized in that: The end of the trough shell wing plate (13) is provided with an arc corner (6), the arc corner (6) is connected to a corner hook (8) through a chain (7), and the corner hook (8) is hung on the upper edge (14) of the trough shell.

5. The method for using the device for hoisting the shell of an aluminum electrolytic cell according to claim 4 comprises the following steps: Step 1: The devices for lifting the shell of the aluminum electrolytic cell are respectively connected to both sides of the cell shell (1) to set as lifting points, and the small holes (31) of the two lifting devices (3) are respectively connected to the steel wire ropes (5) through the shackles (11) at each lifting point, and the two steel wire ropes (5) are connected to the overhead crane hook head (12), and the steel wire ropes (5) are abutted against the arc wrap angle (6), and the large holes (32) of the two lifting devices (3) are placed on the inner side of the cathode window (9) of the cell shell so that the arc groove (33) and the upper edge of the cathode window (9) are abutted, and then a retaining tube (2) is passed between the two large holes (32), and pins (10) are inserted at both ends of the retaining tube (2); Step 2: Using two hooks on a crane, lift the two lifting points on the same side of the tank shell (1) respectively until they are balanced at the same height, and then operate the two cranes simultaneously to lift the tank shell (1).

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