On-line measuring device for furnace bottom pressure drop of electrolytic bath

Abstract

The utility model discloses an electrolytic bath furnace bottom pressure drop on-line measuring device which comprises a measuring instrument, the measuring instrument is connected with a crust breaking hammer rod through a first wire and connected with a measuring bar through a second wire, and the measuring bar is connected with an aluminum explosion block at the cathode steel bar end of an electrolytic bath. A measuring conductor is installed on the crust breaking hammer head, the bottom end of the measuring conductor is lower than the bottom end of the crust breaking hammer head when the measuring conductor stretches out, the measuring conductor is higher than the bottom end of the crust breaking hammer head when the measuring conductor retracts, and the measuring conductor is connected with a measuring instrument through the crust breaking hammer head, the crust breaking hammer rod and a first wire. Therefore, only one measuring conductor is needed to be matched with one measuring rod to be connected with the measuring instrument through the wire, the problems that the number of measuring people is large and the measuring time is long during electrolytic furnace bottom pressure drop measurement can be solved, online measurement of the electrolytic bath furnace bottom pressure drop is achieved, obtaining of the furnace bottom pressure drop is increased to one time every day or even at any time from one week, and measured data are more accurate. The whole device is very simple and practical in structure, easy to manufacture, low in cost and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolysis technology, and in particular to an online measuring device for the pressure drop at the bottom of an electrolytic cell. Background Technology

[0002] The bottom pressure drop of an electrolytic cell is a key reference for determining the cell's set voltage. To monitor its changes, this drop needs to be measured weekly, requiring a three-person team: one person connects a copper rod to the second set of aluminum cathode explosive blocks, another person inserts a probe into the molten aluminum through the aluminum outlet, and a third person uses a multimeter to connect the two impact hammers to read and record the pressure drop value. This method is highly susceptible to human error, requires a large number of personnel, and is inefficient; measuring 260 electrolytic cells by three people would take approximately 3 hours, and the pressure drop value cannot be displayed in real time. To address these issues, online bottom pressure drop measurement devices have been invented, such as the online measurement system for electrolyte temperature, two levels, and bottom pressure drop of an aluminum electrolytic cell disclosed in patent CN112665642B. This system can conveniently and accurately measure electrolyte temperature, two levels, and bottom pressure drop data while ensuring high measurement stability. However, current devices of this type are complex in structure, require a large number of parts to work together, usually require sensors, are costly, have poor reliability, and are not convenient to operate. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing an online measurement device for the pressure drop at the bottom of an electrolytic cell furnace, which is simple in structure, requires fewer parts, is low in cost, is less prone to failure, and is more convenient to operate.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an online measuring device for the bottom pressure drop of an electrolytic cell, comprising a measuring instrument, the measuring instrument being connected to the shell-breaking hammer rod of the shell-breaking hammer head of the electrolytic cell via a first wire, and a measuring rod being connected to an aluminum explosive block at the cathode steel rod end of the electrolytic cell via a second wire; a measuring conductor with telescopic function is installed on the shell-breaking hammer head, the bottom end of the measuring conductor being lower than the bottom end of the shell-breaking hammer head when extended, and the bottom end of the measuring conductor being higher than the bottom end of the shell-breaking hammer head when retracted, the measuring conductor being connected to the measuring instrument via the shell-breaking hammer head, the shell-breaking hammer rod and the first wire.

[0005] Furthermore, the measuring conductor is disposed on the side wall of the hammer head.

[0006] Furthermore, a spring and a movable part are provided in the measuring conductor. The movable part is extended below the bottom end of the hammer head by controlling the spring to pop out, and the movable part is retracted above the bottom end of the hammer head by controlling the spring to contract.

[0007] Preferably, the movable part extends 2cm below the bottom of the shell-breaking hammer head, and retracts 2cm above the bottom of the shell-breaking hammer head.

[0008] Furthermore, a clearance groove is provided on the guide sleeve of the hammer head to align with the position of the measuring conductor.

[0009] Furthermore, the measuring conductor is made of stainless steel, and the measuring rod is made of aluminum.

[0010] Furthermore, the first conductor is a high-temperature resistant power conductor with built-in telescopic function, the second conductor is a high-temperature resistant power conductor, and insulation is ensured between the conductors and the electrolytic cell rack.

[0011] Furthermore, the measuring rod and the aluminum explosive block are welded together to connect the electrolytic cell and the measuring instrument.

[0012] As a preferred option, the measuring instrument is connected to the first and second wires via a plug-in connection structure. Only one measuring instrument is needed in each work area, eliminating the need to install one in each electrolytic cell. This reduces costs and facilitates operation.

[0013] This invention requires only one measuring conductor and one measuring rod connected to the measuring instrument via wires. It solves the problem of numerous personnel and long measurement times associated with measuring the pressure drop at the bottom of electrolytic furnaces, reducing the number of personnel from three to one. It also enables online measurement of the pressure drop at the bottom of the electrolytic cell, increasing the frequency of data acquisition from once a week to once a day or even anytime, resulting in more accurate data. The entire device has a very simple and practical structure, is easy to manufacture, low in cost, and highly reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram, 1 is the measuring conductor, 2 is the shell-breaking hammer head, 21 is the guide sleeve, 3 is the shell-breaking hammer rod, 4 is the shell-breaking cylinder, 5 is the solenoid valve, 6 is the first wire, 7 is the measuring instrument, 8 is the second wire, 9 is the measuring rod, and 10 is the aluminum explosive block. Detailed Implementation

[0016] In this embodiment, refer to Figure 1The online measurement device for the bottom pressure drop of the electrolytic cell includes a measuring instrument 7. The upper layer of the electrolytic cell is electrolyte, and the lower layer is molten aluminum. The measuring instrument 7 is connected to the shell-breaking hammer rod 3 of the shell-breaking hammer head 2 of the electrolytic cell through a first wire 6. The first wire 6 and the shell-breaking hammer rod 3 are welded together. A measuring rod 9 is connected through a second wire 8. The measuring rod 9 is connected to the aluminum explosion block 10 at the end of the cathode steel rod of the electrolytic cell. A measuring conductor 1 with telescopic function is installed on the shell-breaking hammer head 2. When the measuring conductor 1 is extended, its bottom end is lower than the bottom end of the shell-breaking hammer head 2. When the measuring conductor 1 is retracted, its bottom end is higher than the bottom end of the shell-breaking hammer head 2. The measuring conductor 1 is connected to the measuring instrument 7 through the shell-breaking hammer head 2, the shell-breaking hammer rod 3 and the first wire 6.

[0017] The measuring conductor 1 is disposed on the side wall of the shell-breaking hammer head 2. A spring and a movable part are provided in the measuring conductor 1. The movable part is extended below the bottom end of the shell-breaking hammer head 2 by controlling the spring to pop out, and the movable part is retracted above the bottom end of the shell-breaking hammer head 2 by controlling the spring to contract.

[0018] The movable part extends 2cm below the bottom of the shell-breaking hammer head 2, and retracts to 2cm above the bottom of the shell-breaking hammer head 2.

[0019] An avoidance groove is provided on the guide sleeve 21 of the hammer head 2 to align with the measuring conductor 1, so as to avoid interference between the hammer head 2 and the measuring conductor 1 when the hammer head 2 moves up and down.

[0020] The measuring conductor 1 is made of stainless steel, and the measuring rod 9 is made of aluminum.

[0021] The first conductor 6 is a high-temperature resistant power conductor with built-in telescopic function, and the second conductor 8 is a high-temperature resistant power conductor, ensuring that the conductors are insulated from the electrolytic cell rack.

[0022] The measuring rod 9 and the aluminum explosion block 10 are welded together to connect the electrolytic cell and the measuring instrument.

[0023] The measuring instrument 7 is connected to the first wire 6 and the second wire 8 by a plug-in connection structure. Only one measuring instrument 7 is needed in each work area, and it is not necessary to set one for each electrolytic cell. This can reduce costs and facilitate operation.

[0024] During measurement, first, control the movable part of the measuring conductor 1 on the shell-breaking hammer 2 to extend downwards, so that it extends downwards from the bottom of the hammer 2 (the length is based on the bottom of the measuring conductor 1 being inserted 2cm into the molten aluminum when the shell is completely broken). Manually control the shell-breaking solenoid valve 5, and the shell-breaking cylinder 4 will actuate, allowing the shell-breaking hammer 2 to be inserted into the electrolyte along with the measuring conductor 1. At this time, the shell-breaking hammer 2 can only enter the electrolyte, while the measuring conductor 1 is inserted into the molten aluminum. The molten aluminum is connected to the furnace bottom, and a circuit is formed by connecting the shell-breaking hammer rod 3 and the measuring rod 9 to the pressure drop measuring display instrument 7. This completes one measurement of the furnace bottom pressure drop. When not measuring, control the measuring conductor 1 so that its movable part retracts under the action of the spring, retracting to a position more than 2cm away from the bottom of the shell-breaking hammer 2 to prevent interference with the daily shell-breaking operation of the hammer 2. At this time, the furnace bottom measuring circuit is disconnected, and the furnace bottom pressure drop is not measured.

[0025] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. An online measuring device for the pressure drop at the bottom of an electrolytic cell furnace, comprising a measuring instrument, characterized in that: The measuring instrument is connected to the shell-breaking hammer rod of the shell-breaking hammer head of the electrolytic cell via a first wire, and to a measuring rod via a second wire. The measuring rod is connected to the aluminum explosive block at the end of the cathode steel rod of the electrolytic cell. A telescopic measuring conductor is installed on the shell-breaking hammer head. When the measuring conductor is extended, its bottom end is lower than the bottom end of the shell-breaking hammer head. When the measuring conductor is retracted, its bottom end is higher than the bottom end of the shell-breaking hammer head. The measuring conductor is connected to the measuring instrument through the shell-breaking hammer head, the shell-breaking hammer rod, and the first wire.

2. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: The measuring conductor is disposed on the side wall of the hammer head.

3. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: A spring and a movable part are provided in the measuring conductor. The movable part is extended below the bottom of the hammer head by controlling the spring to pop out, and the movable part is retracted above the bottom of the hammer head by controlling the spring to contract.

4. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 3, characterized in that: The movable part extends 2cm below the bottom of the shell-breaking hammer head, and retracts 2cm above the bottom of the shell-breaking hammer head.

5. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: A clearance groove is provided on the guide sleeve of the hammer head to align with the position of the measuring conductor.

6. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: The measuring conductor is made of stainless steel, and the measuring rod is made of aluminum.

7. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: The first conductor is a high-temperature resistant power conductor with built-in telescopic function, and the second conductor is a high-temperature resistant power conductor.

8. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: The measuring rod and the aluminum explosive block are welded together to connect the electrolytic cell and the measuring instrument.

9. The online measuring device for the bottom pressure drop of an electrolytic cell according to claim 1, characterized in that: The measuring instrument is connected to the first and second wires via a plug-in connection structure.

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