Self-pressing conical electrolytic cell crust breaking hammer rod insulation sealing device

Abstract

The utility model discloses a self-pressing type conical electrolytic cell crust breaking hammer rod insulation sealing device which comprises an insulation sleeve, an insulation positioning sleeve, a spring and a pressing plate, a crust breaking hole matched with a crust breaking hammer rod is formed in a horizontal cover plate, the insulation positioning sleeve is fixedly arranged on the edge of the crust breaking hole, an insulation sleeve is detachably arranged in the insulation positioning sleeve, and the insulation sleeve is fixedly connected with the crust breaking hammer rod. A spring is arranged at the upper end of the insulating sleeve, and the upper end of the spring is matched with the pressing plate; the pressing plate is arranged on a fixing rod in a vertical moving mode, and a nut matched with the upper surface of the pressing plate is arranged on the fixing rod. The self-pressing conical insulation sealing device for the crust breaking hammer rod of the electrolytic cell is simple in structure, practical in function and ingenious in design, and effectively solves the problems that a sealing device on a crust breaking hammer rod hole between the crust breaking hammer rod and the horizontal cover plate is poor in sealing effect and high in maintenance cost.

Description

A self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device Technical Field

[0001] This utility model relates to the field of insulating and sealing devices for shell-breaking hammer rods, and in particular to an insulating and sealing device for a self-pressurized conical electrolytic cell shell-breaking hammer rod. Background Technology

[0002] During the electrolysis of cryolite-alumina molten salt, aluminum is deposited on the cathode, and a large amount of CO, CO2, and some fluorides are generated on the anode. Since alumina contains 0.2-0.5% moisture and atmospheric water vapor, the solid fluoride salt reacts at high temperature (400-600℃) to generate HF gas. The chemical formulas are as follows (1) and (2):

[0003] 2Na3ALF6+3H2O=2AL2O3+6NaF+6HF↑ (1)

[0004] 2ALF3 + 3H2O = AL2O3 + 6HF↑ (2)

[0005] Meanwhile, since both alumina powder and fluoride salts have a certain degree of volatile properties, the main components of electrolysis flue gas are CO, CO2, some fluorides and HF gas. If they are not collected in time and allowed to diffuse in the electrolysis plant or into the atmosphere, they will cause great harm to the physical and mental health of employees and the surrounding ecological environment.

[0006] To improve the efficiency of flue gas collection in electrolytic cells, the sealing of the electrolytic cell itself is also very important. The sealing of electrolytic cells mainly consists of three parts: cell cover plate sealing, anode guide rod sealing, and shell-breaking hammer rod sealing.

[0007] Among them, the hammer rod seal is mainly used to seal the hammer rod hole between the hammer rod and the horizontal cover plate. Due to its small sealing and maintenance space and dynamic sealing characteristics, it is the most difficult to improve the sealing effect.

[0008] Currently, the widely used sealing methods include semi-locking seals with insulating bricks and "U"-shaped seals with recycled conveyor belts, but the sealing effect remains unsatisfactory. Furthermore, there are problems such as the high cost of insulating bricks and the conveyor belts becoming brittle under high-temperature baking.

[0009] (1) The sealing method of “U”-shaped insulating bricks plus semi-locking sealing frame has a generally good effect. However, due to the need for electrolysis personnel to repeatedly strike the hammer rod when handling the shell head package and alumina stack, the “U”-shaped insulating bricks are severely damaged. In addition, the high cost of “U”-shaped insulating bricks increases maintenance costs.

[0010] (2) The “U”-shaped seal made from waste conveyor belts is prone to hardening under the high temperature of 920°C or above in the electrolytic cell, resulting in a short service life of the material.

[0011] Both of the above methods suffer from short service life and frequent replacement and maintenance of sealing materials. Furthermore, the limited space within the electrolytic cell's internal frame makes maintenance difficult and increases the workload for workers. The lack of a seal on the shell-breaking hammer rod affects the electrolytic cell's gas collection efficiency, leading to a deterioration of the electrolytic plant environment and low fluoride recovery rates. To improve the electrolytic cell's gas collection efficiency, it is necessary to increase the load on the exhaust fan, resulting in increased electricity costs for electrolytic production.

[0012] Therefore, how to develop a self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device has become an urgent problem for those skilled in the art to solve. Summary of the Invention

[0013] The purpose of this invention is to provide a self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device to solve the problems of poor sealing effect and high maintenance cost of the sealing device on the shell-breaking hammer rod hole between the shell-breaking hammer rod and the horizontal cover plate.

[0014] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0015] This utility model discloses an insulating and sealing device for a self-pressurized conical electrolytic cell shell-breaking hammer rod, comprising an insulating sleeve, an insulating positioning sleeve, a spring, and a pressure plate. A shell-breaking hole is formed on a horizontal cover plate to mate with the shell-breaking hammer rod. An insulating positioning sleeve is fixedly installed at the edge of the shell-breaking hole. An insulating sleeve is detachably installed inside the insulating positioning sleeve. A spring is installed at the upper end of the insulating sleeve, and the upper end of the spring mates with the pressure plate. The pressure plate is movably mounted on a fixed rod, and a nut is installed on the fixed rod to mate with the upper surface of the pressure plate.

[0016] Furthermore, the nut is threaded into the fixing rod.

[0017] Furthermore, the bottom end of the fixing rod is fixedly mounted on the upper surface of the horizontal cover plate.

[0018] Furthermore, the pressure plate has a through hole that mates with the shell-beating hammer rod.

[0019] Furthermore, the spring is sleeved on the shell-beating hammer rod, and the shell-beating hammer rod passes downward through the shell-beating hole on the horizontal cover plate and is equipped with a hammer head.

[0020] Furthermore, a first washer is provided between the top end of the spring and the pressure plate; a second washer is provided between the bottom end of the spring and the insulating sleeve.

[0021] Furthermore, the insulating sleeve has a semi-circular ring structure, with a groove on the inner side of the insulating sleeve that mates with the shell-breaking hammer rod, and a positioning groove on the outer side of the insulating sleeve that mates with the hoop.

[0022] Furthermore, the mating angle between the insulating sleeve and the insulating positioning sleeve is 45°.

[0023] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0024] This utility model relates to a self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device. An insulating positioning sleeve and a spring are used to fix the insulating sleeve to the shell-breaking hammer rod, serving both a guiding and sealing function. The fixing rod and pressure plate of this self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device are used to adjust the clamping spring. The detachable pressure plate facilitates the replacement of the sealing material later, making maintenance simple and convenient. This utility model improves upon existing shell-breaking hammer rod sealing methods, ensuring easy disassembly and maintenance of the sealing device, and that the sealing material always adheres tightly to the shell-breaking hammer rod, thus both guiding the hammer rod and ensuring a consistent seal. This utility model also improves the flue gas recovery efficiency at the hammer rod, extends the lifespan of the sealing material, and reduces the labor intensity of replacing the sealing material. In summary, the self-pressurized conical electrolytic cell shell-breaking hammer rod insulation sealing device of this utility model has a simple structure, practical function, and ingenious design. It effectively solves the problems of poor sealing effect and high maintenance cost of the sealing device on the shell-breaking hammer rod hole between the shell-breaking hammer rod and the horizontal cover plate. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 is a diagram of the insulating and sealing device for the self-pressurized conical electrolytic cell shell-breaking hammer rod of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Hammer head; 2. Insulating positioning sleeve; 3. Fixing rod; 4. Spring; 5. Nut; 6. Pressure plate; 7. First washer; 8. Second washer; 9. Hoop; 10. Insulating sleeve; 11. Shell-breaking hammer rod. Detailed Implementation

[0028] As shown in Figure 1, a self-pressurized conical electrolytic cell shell-breaking hammer rod insulation sealing device includes an insulating sleeve 10, an insulating positioning sleeve 2, a spring 4, and a pressure plate 6.

[0029] A shell-beating hole is provided on the horizontal cover plate to cooperate with the shell-beating hammer rod 11. The shell-beating hammer rod 11 passes downward through the shell-beating hole on the horizontal cover plate and is provided with a hammer head 1.

[0030] An insulating positioning sleeve 2 is fixedly provided on the edge of the casing hole, and an insulating sleeve 10 is detachably provided inside the insulating positioning sleeve 2. The mating angle between the insulating sleeve 10 and the insulating positioning sleeve 2 is 45°.

[0031] The insulating sleeve 10 has a semi-circular ring structure. The inner side of the insulating sleeve 10 has a groove that mates with the hammer rod 11, and the outer side of the insulating sleeve 10 has a positioning groove that mates with the clamp 9. In use, the two insulating sleeves 10 need to be combined into a ring shape using the clamp 9.

[0032] A spring 4 is provided at the upper end of the insulating sleeve 10. The spring 4 is sleeved on the shell-beating hammer rod 11, and the upper end of the spring 4 cooperates with the pressure plate 6. The pressure plate 6 has a through hole that cooperates with the shell-beating hammer rod 11. A first washer 7 is provided between the top end of the spring 4 and the pressure plate 6; a second washer 8 is provided between the bottom end of the spring 4 and the insulating sleeve 10.

[0033] The pressure plate 6 is movably mounted on the fixed rod 3, and the fixed rod 3 is provided with a nut 5 that mates with the upper surface of the pressure plate 6. The nut 5 is threadedly engaged with the fixed rod 3. The bottom end of the fixed rod 3 is fixedly mounted on the upper surface of the horizontal cover plate.

[0034] The installation process of this utility model is as follows:

[0035] First, the insulating positioning sleeve 2 is welded to the shell-punching hole of the horizontal cover plate, and the second washer 8, spring 4, and first washer 7 are fitted onto the shell-punching hammer rod 11, and the shell-punching hole is inserted into the shell-punching hammer rod 11.

[0036] The second step is to lift the second pad 8, spring 4, and first pad 7, and install two symmetrical insulating sleeves 10 with grooves in the middle of the height direction inside the insulating positioning sleeve 2. Before installing the insulating sleeves 10, use the clamp 9 to tie the two symmetrical insulating sleeves 10 together.

[0037] The third step is to put the second washer 8, the spring 4, and the first washer 7 back into their original positions, with the second washer 8 pressing on the insulating sleeve 10.

[0038] Fourth step, put the pressure plate 6 on the welded fixing rod 3, tighten the pressure plate 6 with the nut 5, the pressure plate 6 presses the first washer 7, under the action of the first washer 7, the spring 4 is compressed, the second washer 8 presses the insulating sleeve 10, and fixes it in the insulating positioning sleeve 2, ensuring that the position of the sealing material insulating sleeve 10 is always close to the shell hammer rod 11, ensuring the sealing effect.

[0039] When replacing the insulating sleeve 10, first loosen the nut 5, remove the pressure plate 6, lift the second washer 8, spring 4, and first washer 7 upwards, take out the insulating sleeve 10 that needs to be replaced, and reinstall it according to the installation sequence.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An insulating and sealing device for a self-pressurized conical electrolytic cell shell-breaking hammer rod, characterized in that: The device includes an insulating sleeve (10), an insulating positioning sleeve (2), a spring (4), and a pressure plate (6). A shell-punching hole that mates with a shell-punching hammer rod (11) is provided on the horizontal cover plate. An insulating positioning sleeve (2) is fixedly provided on the edge of the shell-punching hole. An insulating sleeve (10) is detachably provided inside the insulating positioning sleeve (2). A spring (4) is provided on the upper end of the insulating sleeve (10). The upper end of the spring (4) mates with the pressure plate (6). The pressure plate (6) is movably mounted on a fixed rod (3). A nut (5) that mates with the upper surface of the pressure plate (6) is provided on the fixed rod (3).

2. The self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device according to claim 1, characterized in that: The nut (5) is threadedly engaged with the fixing rod (3).

3. The self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device according to claim 1, characterized in that: The bottom end of the fixing rod (3) is fixedly set on the upper surface of the horizontal cover plate.

4. The self-pressing cone cell hatcher hammer rod insulation sealing device according to claim 1, characterized in that: The pressure plate (6) has a through hole that mates with the shell-beating hammer rod (11).

5. The self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device according to claim 1, characterized in that: The spring (4) is sleeved on the shell-beating hammer rod (11), and the shell-beating hammer rod (11) passes downward through the shell-beating hole on the horizontal cover plate and is provided with a hammer head (1).

6. The self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device according to claim 5, characterized in that: A first washer (7) is provided between the top end of the spring (4) and the pressure plate (6); a second washer (8) is provided between the bottom end of the spring (4) and the insulating sleeve (10).

7. The self-pressing cone cell hatcher hammer rod insulation sealing device according to claim 1, characterized in that: The insulating sleeve (10) has a semi-circular ring structure. The inner side of the insulating sleeve (10) is provided with a groove that cooperates with the shell-breaking hammer rod (11). The outer side of the insulating sleeve (10) is provided with a positioning groove that cooperates with the hoop (9).

8. The self-pressurized conical electrolytic cell shell-breaking hammer rod insulation and sealing device according to claim 1, characterized in that: The fitting angle between the insulating sleeve (10) and the insulating positioning sleeve (2) is 45°.

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