CN107164784B

CN107164784B - Automatic intermittent aluminum electrolyte temperature detection system

Info

Publication number: CN107164784B
Application number: CN201710513362.4A
Authority: CN
Inventors: 王永芳; 张波; 牟春玲
Original assignee: Shandong Hongqiao New Material Co Ltd
Current assignee: Shandong Hongqiao New Material Co Ltd
Priority date: 2017-06-29
Filing date: 2017-06-29
Publication date: 2023-06-30
Anticipated expiration: 2037-06-29
Also published as: CN107164784A

Abstract

A system for automatically intermittently detecting the temperature of an aluminum electrolyte, comprising: the device comprises an air cylinder, a power box, a hammer head, a cover plate, a winding shaft and a thermocouple probe. When crust breaks, the power mechanism I drives the cover plate to turn over and open, and when the cover plate turns over and opens, the solid electrolyte adhered on the hammer head is even clear, so that the problem that the electrolyte adheres on the hammer head is effectively solved. After the cover plate is opened, the power mechanism II drives the winding shaft to rotate, so that the thermocouple probe moves downwards until the thermocouple probe enters the electrolyte to measure the temperature, the depth and the residence time of the thermocouple probe entering the high-temperature corrosion liquid electrolyte are effectively controlled, the temperature detection precision is improved, and the service life of the thermocouple is prolonged. The whole measuring process does not need to consider that the slot cover plate is frequently opened in operation, thereby effectively avoiding the escape of fluorine smoke in the slot, improving the working environment, reducing the labor intensity of workers and improving the working efficiency.

Description

Automatic intermittent aluminum electrolyte temperature detection system

Technical Field

The invention relates to the field of aluminum electrolysis, in particular to an automatic intermittent aluminum electrolyte temperature detection system.

Background

In the aluminum electrolysis production, the electrolyte temperature is a very important parameter in the production process, and can directly reflect the working condition of an electrolytic tank, so that the detection and control are needed in time, but as the temperature in the electrolytic tank is up to 960 ℃, the electrolyte has strong corrosiveness, and the surface is provided with a solidified shell surface layer, a method for continuously measuring the temperature is not found in the industry at present. In order to timely detect the electrolyte temperature, accurately control the running state of the electrolytic tank, improve the working efficiency of detection operation, prevent the environmental pollution caused by the flue gas emitted by the tank cover plate frequently opened by manual detection temperature, realize automatic operation to replace manual work, and particularly provide an automatic intermittent detection method for the aluminum electrolyte temperature, and design and invent a system for automatically intermittent detection of the aluminum electrolyte temperature.

At present, the aluminum electrolyte temperature detection mainly adopts a manual hand-held armored thermocouple thermometer detection mode, namely, the surface layer shell surface of the electrolyte is smashed firstly, then an armored thermocouple probe extends into the electrolyte and stays for about 10 seconds, the temperature value displayed on a thermometer screen is observed, and then manual recording is carried out. The method is labor-consuming and time-consuming, has low efficiency, and influences the measurement accuracy due to the fact that the thermocouple stretches into the electrolyte by depth and residence time; in addition, when the thermocouple stretches into the electrolyte and is taken out after measurement is completed, a layer of solid crust is formed on the surface of the thermocouple due to temperature difference, and the thermocouple needs to be knocked down when the thermocouple is measured next time, so that the service life of the thermocouple is influenced; and then the temperature is measured manually, the slot cover plate is required to be frequently opened, and fluorine-containing smoke in the slot can be diffused in the factory building when the slot cover plate is opened, so that the air and the surrounding environment in the factory building are polluted.

The method for solving the problem at the present stage mainly reduces the detection times of the electrolyte temperature as much as possible, changes the original once a day into once every three days, but is extremely unfavorable for timely grasping the running condition of the electrolytic tank, can not be lost, and can not solve the problem fundamentally.

Disclosure of Invention

The invention provides the system for automatically and intermittently detecting the temperature of the aluminum electrolyte, which has high measurement precision, reduces the labor intensity of workers and reduces the environmental pollution in order to overcome the defects of the technology.

The technical scheme adopted for overcoming the technical problems is as follows:

a system for automatically intermittently detecting the temperature of an aluminum electrolyte, comprising:

the air cylinder is vertically arranged on the electrolytic tank;

the power box is sealed at the periphery and internally provided with a containing cavity, and the upper end of the power box is connected with the head end of a piston rod of the air cylinder;

the hammer head is used for breaking electrolyte crust at the aluminum port part of the electrolytic tank, is vertically arranged below the power box and is of a circular tube structure;

the cover plate is rotatably arranged at the opening at the lower end of the hammer head through a hinge, and a power mechanism I for driving the cover plate to open or close is arranged in the power box;

the spool is horizontally and rotatably arranged in the power box and is driven to rotate by the power mechanism II; and

the thermocouple probe is positioned in the inner hole of the hammer head, and a cable of the thermocouple probe is wrapped on the winding shaft.

Above-mentioned power unit I is including installing in the power box motor, install in motor shaft epaxial gear I, rotate the pivot I of installing in the power box and install in pivot I and with gear I engaged with gear II, pivot I is connected with spool coaxial transmission through clutch I.

The power mechanism II comprises a rotating shaft II arranged in the power box, a gear III arranged on the rotating shaft II and meshed with the gear I, a cam arranged in the power box and in transmission connection with the rotating shaft II through a clutch II, a cam arranged on the cam, a sleeve vertically arranged in the power box and a pull rod inserted in the sleeve in a sliding manner, wherein the lower end of the pull rod is hinged to the upper end face of the cover plate through a pin shaft, a boss is arranged on the pull rod, the upper end of the pull rod is in contact with the power box, the lower end of the pull rod is in contact with the boss, and when the spring is in a free state, the upper end of the pull rod is in contact with the lowest point of the cam and the pull rod pulls the cover plate to seal an opening at the lower end of the hammer head.

In order to improve automatic control, the automatic control device further comprises a sensing switch, and when the piston rod of the air cylinder is fully extended or fully retracted, the piston rod triggers the sensing switch.

The beneficial effects of the invention are as follows: when the temperature measurement is needed, the air cylinder acts, the power box drives the hammer to move downwards until the hammer is driven to break the electrolyte crust at the aluminum outlet of the electrolytic tank, and in the process, the power mechanism I drives the cover plate to seal the opening at the lower end of the hammer. When crust breaks, the power mechanism I drives the cover plate to turn over and open, and the cover plate turns over and opens to timely remove the solid electrolyte adhered on the hammer head, so that the problem that the electrolyte is adhered on the hammer head is effectively solved. After the cover plate is opened, the power mechanism II drives the winding shaft to rotate, so that the thermocouple probe moves downwards until the thermocouple probe enters the electrolyte to measure the temperature, the depth and the residence time of the thermocouple probe entering the high-temperature corrosion liquid electrolyte are effectively controlled, the temperature detection precision is improved, and the service life of the thermocouple is prolonged. The whole measuring process does not need to manually operate frequently to open the slot cover plate, so that the escape of fluorine smoke in the slot is effectively avoided, the working environment is improved, the labor intensity of workers is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of a cam portion of the present invention;

in the figure, cylinder 1, power box 3, motor 4, gear I5, inductive switch 6, shaft I7, shaft II 8, gear II 9, gear III 10, cam 11, cable 12, hammer 13, sleeve 14, pull rod 15, boss 16, spring 17, thermocouple probe 18, cover plate 19, pin 20, clutch I21, clutch II 22, spool 23, and camshaft.

Detailed Description

The invention is further described with reference to fig. 1 and 2.

A system for automatically intermittently detecting the temperature of an aluminum electrolyte, comprising: the air cylinder 1 is vertically arranged on the electrolytic tank; the power box 2 is sealed at the periphery and internally provided with a containing cavity, and the upper end of the power box 2 is connected with the head end of a piston rod of the air cylinder 1; the hammer head 12 is used for breaking electrolyte crust at the aluminum port part of the electrolytic tank, is vertically arranged below the power box 2, and is of a circular tube structure; the cover plate 18 is rotatably arranged at the opening of the lower end of the hammer head 12 through a hinge, and a power mechanism I for driving the cover plate 18 to open or close is arranged in the power box 2; the spool 22 is horizontally and rotatably arranged in the power box 2 and is driven to rotate by a power mechanism II; and a thermocouple probe 17 is positioned in the inner hole of the hammer head 12, and the cable 11 of the thermocouple probe 17 is wrapped on the winding shaft 22. When temperature measurement is needed, the air cylinder 1 acts, the power box 2 is driven to drive the hammer head 12 to move downwards until the hammer head 12 is driven to break the electrolyte crust at the aluminum opening part of the electrolytic tank, and in the process, the power mechanism I drives the cover plate 18 to seal the opening at the lower end of the hammer head 12. When the crust breaks, the power mechanism I drives the cover plate 18 to turn over and open, and when the cover plate 18 turns over and open, the solid electrolyte adhered on the hammer head 12 is even clear, so that the problem that the electrolyte adheres on the hammer head 12 is effectively solved. After the cover plate 18 is opened, the power mechanism II drives the winding shaft 22 to rotate, so that the thermocouple probe 17 moves downwards until the thermocouple probe enters the electrolyte to measure the temperature, the depth and the residence time of the thermocouple probe 17 entering the high-temperature corrosion liquid electrolyte are effectively controlled, the temperature detection precision is improved, and the service life of the thermocouple is prolonged. The whole measuring process does not need to consider that the slot cover plate is frequently opened in operation, thereby effectively avoiding the escape of fluorine smoke in the slot, improving the working environment, reducing the labor intensity of workers and improving the working efficiency.

The power mechanism I can be of a structure comprising a motor 3 arranged in the power box 2, a gear I4 arranged on the rotating shaft of the motor 3, a rotating shaft I6 rotatably arranged in the power box 2 and a gear II 8 arranged on the rotating shaft I6 and meshed with the gear I4, wherein the rotating shaft I6 is in coaxial transmission connection with the winding shaft 22 through a clutch I20. The power mechanism II can be in a structure comprising a rotating shaft II 7 rotatably installed in the power box 2, a gear III 9 installed on the rotating shaft II 7 and meshed with the gear I4, a cam shaft 23 rotatably installed in the power box 2 and in transmission connection with the rotating shaft II 7 through a clutch II 21, a cam 10 installed on the cam shaft 23, a sleeve 13 vertically arranged in the power box 2 and a pull rod 14 slidably inserted in the sleeve 13, wherein the pull rod 14 is vertically slidably inserted in an inner hole of the hammer head 12, the lower end of the pull rod 14 is hinged with the upper end face of the cover plate 18 through a pin shaft 19, a boss 15 is arranged on the pull rod 14, a spring 16 is sleeved on the pull rod 14, the upper end of the spring is in contact with the power box 2, the lower end of the spring 16 is in contact with the boss 15, when the spring 16 is in a free state, the upper end of the pull rod 14 is in contact with the lowest point of the cam 10, and the pull rod 14 pulls the cover plate 18 to seal an opening at the lower end of the hammer head 12. When the measuring cylinder 1 needs to drive the hammer head 12 to break electrolyte crust, the cover plate 18 seals the opening at the lower end of the hammer head 12, after the crust breaks, the clutch II 21 is combined, the clutch I20 is disconnected, the motor 3 rotates, the cam shaft 23 is driven to rotate through the meshed gear I4 and the gear III 9, the pull rod 14 is driven to move downwards along the sleeve 13 in the rotating process of the cam 10, the cover plate 18 is driven to be opened by the pull rod 14, the clutch II 21 is disconnected, and the clutch I20 is combined, so that when the motor 3 rotates, the winding shaft 22 is driven to rotate through the meshed gear I4 and the meshed gear II 8, the paying-off of the cable 11 is realized, and the thermocouple probe 17 moves downwards to enter aluminum water for measuring the temperature. The thermocouple probe 17 and the pull rod 14 can be driven to separate by a motor 3 matched with the clutch I20 and the clutch II 21, so that the control system is simple and the operation is reliable.

Further, the air cylinder can further comprise a sensing switch 5, and when the piston rod of the air cylinder 1 is fully extended or fully retracted, the piston rod triggers the sensing switch 5. The cylinder 1 acts to drive the hammer head 12 to start crust breaking, and the inductive switch 5 judges whether the crust of the aluminum mouth is opened or not by detecting the position of a piston rod of the cylinder 1. When the piston rod of the cylinder 1 is fully extended, it triggers the inductive switch 5, at which point the system decides that the crust is open. If the piston rod is not fully extended, it does not trigger the inductive switch 5, this action is repeated until the hammer head 12 breaks the crust.

Claims

1. A system for automatically and intermittently detecting the temperature of an aluminum electrolyte, comprising:

the air cylinder (1) is vertically arranged on the electrolytic tank;

the power box (2) is sealed at the periphery and internally provided with a containing cavity, and the upper end of the power box (2) is connected with the head end of a piston rod of the air cylinder (1);

the hammer head (12) is used for breaking electrolyte crust at the aluminum port of the electrolytic tank and is vertically arranged below the power box (2), and the hammer head (12) is of a circular tube structure;

the cover plate (18) is rotatably arranged at the opening of the lower end of the hammer head (12) through a hinge, and a power mechanism I for driving the cover plate (18) to open or close is arranged in the power box (2);

the winding shaft (22) is horizontally and rotatably arranged in the power box (2) and is driven to rotate by the power mechanism II; and

the thermocouple probe (17) is positioned in the inner hole of the hammer head (12), and a cable (11) of the thermocouple probe (17) is wrapped on the winding shaft (22);

the power mechanism I comprises a motor (3) arranged in the power box (2), a gear I (4) arranged on a rotating shaft of the motor (3), a rotating shaft I (6) rotatably arranged in the power box (2) and a gear II (8) arranged on the rotating shaft I (6) and meshed with the gear I (4), wherein the rotating shaft I (6) is coaxially connected with a winding shaft (22) in a transmission manner through a clutch I (20);

the power mechanism II comprises a rotating shaft II (7) installed in the power box (2), a gear III (9) installed on the rotating shaft II (7) and meshed with the gear I (4), a cam shaft (23) installed in the power box (2) and in transmission connection with the rotating shaft II (7) through a clutch II (21), a cam (10) installed on the cam shaft (23), a sleeve (13) vertically arranged in the power box (2) and a pull rod (14) slidingly inserted in the sleeve (13), the pull rod (14) is vertically slidingly inserted in an inner hole of the hammer head (12), the lower end of the pull rod (14) is hinged with the upper end face of the cover plate (18) through a pin shaft (19), a boss (15) is arranged on the pull rod (14), a spring (16) is sleeved on the pull rod (14), the upper end of the spring is in contact with the power box (2), the lower end of the spring (16) is in contact with the boss (15), and when the spring (16) is in a free state, the upper end of the pull rod (14) is in contact with the lowest point of the cam (10) and the opening of the pull rod (14) and closes the lower end of the hammer head (18).

2. The system for automatically and intermittently detecting the temperature of an aluminum electrolyte according to claim 1, wherein: the air cylinder is characterized by further comprising a sensing switch (5), and when the piston rod of the air cylinder (1) is fully extended or fully retracted, the piston rod triggers the sensing switch (5).