Thermal resistor for measuring temperature of aluminum electrolysis cell

Abstract

The utility model particularly discloses a thermal resistor for measuring the temperature of an aluminum electrolysis cell, which comprises a temperature conduction type shell, a temperature measuring element and a high-temperature-resistant lead, the temperature conduction type shell is connected with a temperature-measured part and is used for conducting the temperature of the temperature-measured part, and the temperature measuring element is fixedly arranged in an inner cavity of the temperature conduction type shell. A high-temperature-resistant heat-conducting layer for uniformly conducting temperature is filled between the temperature measuring element and the temperature conduction type shell, one end of the high-temperature-resistant lead is connected with the temperature measuring element, and the other end of the high-temperature-resistant lead penetrates through the temperature conduction type shell and is connected with an external temperature measuring circuit for transmitting a temperature signal of the temperature measuring element. The high-temperature heat conduction layer is filled between the temperature measurement element and the temperature conduction type shell, so that the temperature measurement element is uniformly heated, the temperature measurement element can bear deformation stress at high temperature, and the accuracy of temperature data of the aluminum electrolysis cell in a high-temperature state is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolysis equipment, in particular to a thermal resistor for measuring temperature of an aluminum electrolysis cell. Background Art

[0002] Aluminum electrolysis cell is the main production equipment of aluminum electrolysis. Aluminum electrolysis is the process of converting aluminum in alumina into metallic aluminum in an aluminum electrolysis cell. The conversion principle is to use cryolite and alumina melt as electrolytes, carbon materials as two poles, direct current is introduced into the electrolyte and aluminum liquid layer through the anode, and then discharged from the cathode.

[0003] At present, the temperature of the electrolyte and aluminum liquid in the aluminum electrolytic cell is as high as 950°C. Even if it is transmitted through the insulation layer to the cell shell, the temperature is still about 400°C. When the insulation layer is damaged, the temperature at the cell shell will rise abnormally and even cause a furnace leakage accident, which may cause a large impact on production and economic losses. In view of this, it is necessary to detect the temperature of the aluminum electrolytic cell in real time, but there is no corresponding temperature measuring thermal resistor in the prior art. This application provides a thermal resistor for measuring the temperature of the aluminum electrolytic cell to solve the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the above-mentioned background technology, and provides a thermal resistor for measuring the temperature of an aluminum electrolytic cell, comprising a temperature conductive shell, a temperature measuring element and a high-temperature resistant lead wire, the temperature conductive shell is connected to a temperature-measured component for conducting the temperature of the temperature-measured component, the temperature measuring element is fixedly arranged in the inner cavity of the temperature conductive shell, and a high-temperature resistant heat-conductive layer for uniformly conducting the temperature is filled between the temperature conductive shell and the temperature conductive shell, one end of the high-temperature resistant lead wire is connected to the temperature measuring element, and the other end of the high-temperature resistant lead wire passes through the temperature conductive shell and is connected to an external temperature measurement circuit for transmitting the temperature signal of the temperature measuring element.

[0005] Preferably, the inner cavity of the temperature-conducting housing is provided with a ceramic insulating tube, the temperature measuring element comprises a temperature sensor placed in the ceramic insulating tube, and the temperature measuring element is fixedly connected to one end of the high-temperature resistant lead wire via the temperature sensor.

[0006] Preferably, the temperature sensor and the high temperature resistant lead are fixed by laser welding.

[0007] Preferably, it also includes a lead protection sleeve, one end of which is placed in the inner cavity of the temperature conductive shell and sleeved on the high temperature resistant lead, and the other end of the lead protection sleeve is placed outside the temperature conductive shell and away from the high temperature area of ​​the aluminum electrolytic cell.

[0008] Preferably, one end opening of the temperature-conducting shell is a point-pressing clamping opening, in which a high-temperature resistant protective sleeve is provided. The high-temperature resistant protective sleeve is located between the lead protective sleeve and the high-temperature resistant lead and is used to protect the high-temperature resistant lead during the point-pressing clamping process of the temperature-conducting shell.

[0009] Preferably, a conical pressing portion is provided at one end of the lead protection sleeve away from the temperature conductive housing, and the conical pressing portion is used to protect the high temperature resistant lead in the lead protection sleeve from falling off.

[0010] Preferably, the end of the high temperature resistant lead away from the temperature measuring element is connected with a deformable pressing end head, and the deformable pressing end head is matched and connected with a terminal on an external temperature measuring circuit.

[0011] Preferably, a mounting hole is provided at one end of the temperature-conducting housing away from the high-temperature-resistant lead, and the temperature-conducting housing is fixedly connected to the temperature-measured component through the mounting hole.

[0012] Compared with the prior art, the utility model provides a thermal resistor for measuring the temperature of an aluminum electrolytic cell. By filling a high-temperature resistant heat-conductive layer between the temperature-conductive shell and the temperature measuring element, the temperature of the object to be measured conducted by the temperature-conductive shell is uniformly conducted to the temperature measuring element based on the high-temperature resistant heat-conductive layer, so that the temperature measuring element has a fast thermal response speed and the thermal variable stress is fully released, thereby greatly improving the temperature measurement performance of the temperature measuring element, ensuring the accuracy of the temperature data of the measured component, and having the characteristics of simple structure and high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the structure of a thermal resistor for measuring the temperature of an aluminum electrolytic cell.

[0014] In the figure: 1. mounting hole, 2. temperature conduction type housing, 3. high temperature resistant heat conductive layer, 4. temperature measuring element, 5. ceramic insulating tube, 6. laser welding point, 7. high temperature resistant lead wire, 8. lead wire protection cover, 9. high temperature resistant protection cover, 10. point pressure clamping mouth, 11. conical clamping part, 12 deformation clamping end. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1As shown, the utility model provides a thermal resistor for measuring the temperature of an aluminum electrolytic cell, comprising a temperature conductive housing 2, a temperature measuring element 4 and a high temperature resistant lead wire 7. The temperature conductive housing 2 is connected to a temperature-measured component for conducting the temperature of the temperature-measured component. The temperature measuring element 4 is fixedly arranged in an inner cavity of the temperature conductive housing 2, and a high temperature resistant heat conductive layer 3 for uniformly conducting the temperature is filled between the temperature conductive housing 2. One end of the high temperature resistant lead wire 7 is connected to the temperature measuring element 4, and the other end of the high temperature resistant lead wire 7 passes through the temperature conductive housing 2 and is connected to an external temperature measurement circuit for transmitting a temperature signal of the temperature measuring element 4.

[0017] In this embodiment, the temperature-measured component refers to the part of the aluminum electrolytic cell where the temperature needs to be measured. The temperature-conducting housing 2 is stamped from a copper tube; the temperature-measuring element 4 is a ceramic-based thin-film platinum thermal resistor chip with thermal resistance characteristics, and the resistance value of the temperature-measuring element 4 changes linearly during the temperature change process; the high-temperature-resistant heat-conducting layer 3 is a thermally conductive silicone grease, which has the characteristics of heat conduction, insulation, softness and high-temperature resistance.

[0018] In this embodiment, the temperature conductive housing 2 provides physical protection for the temperature measuring element 4, and conducts the temperature of the temperature-measured component to the temperature measuring element 4 through the high-temperature resistant heat-conductive layer 3, and then transmits the temperature data to the external temperature measurement circuit based on the high-temperature resistant lead to obtain the final temperature data. Since the high-temperature resistant heat-conductive layer 3 in the thermal resistor can be heated evenly, the temperature measuring element 4 has a fast thermal response speed, and the thermal variable stress is fully released, which greatly improves the temperature measurement performance of the temperature measuring element 4 and ensures the accuracy of the temperature data of the temperature-measured component.

[0019] like Figure 1 As shown, the inner cavity of the temperature conductive housing 2 is provided with a ceramic insulating tube 5, and the temperature measuring element 4 includes a temperature sensor placed in the ceramic insulating tube 5. The temperature measuring element 4 is fixedly connected to one end of the high temperature resistant lead 7 through the temperature sensor.

[0020] In this embodiment, the ceramic insulating tube 5 is provided, which can effectively protect the temperature sensor in the temperature measuring element 4 and further ensure the insulation performance between the temperature measuring element 4 and the shell of the aluminum electrolysis cell.

[0021] The temperature sensor is fixed to the high temperature resistant lead wire 7 by laser welding. In this structure, the temperature sensor is fixed to the high temperature resistant lead wire 7 by laser welding, and a laser welding point 6 is formed at the end of the ceramic insulating tube 5. The laser welding point 6 can be used to connect the temperature sensor to the high temperature resistant lead wire 7, and then the temperature signal of the temperature measuring element 4 is led out and transmitted to the external temperature measurement circuit.

[0022] like Figure 1As shown, it also includes a lead protection sleeve 8, one end of which is placed in the inner cavity of the temperature conductive shell 2 and sleeved on the high-temperature resistant lead 7, and the other end of the lead protection sleeve 8 is placed on the outside of the temperature conductive shell 2 and away from the high-temperature area of ​​the aluminum electrolytic cell.

[0023] In this embodiment, the lead protection sleeve 8 is provided and sleeved on the high temperature resistant lead 7, so as to protect the high temperature resistant lead 7 and ensure the integrity of the high temperature resistant lead 7 during use. It should be noted that the lead protection sleeve 8 can bear its own weight and drag force in the high temperature zone of the aluminum electrolytic cell, and can meet the requirement that the external temperature measurement circuit connected to the high temperature resistant lead 7 is far away from the high temperature zone of the aluminum electrolytic cell.

[0024] like Figure 1 As shown, one end opening of the temperature conductive housing 2 is a point pressure clamping opening 10, and a high temperature resistant protective sleeve 9 is provided in the point pressure clamping opening 10. The high temperature resistant protective sleeve 9 is located between the lead protection sleeve 8 and the high temperature resistant lead 7 and is used to protect the high temperature resistant lead 7 during the point pressure clamping process of the temperature conductive housing 2.

[0025] In this embodiment, an opening at one end of the temperature-conducting housing 2 is set as a point pressure clamping port 10 for point pressure clamping the high-temperature resistant lead 7. By setting a high-temperature resistant protective cover 9 at the position of the point pressure clamping port 10, the high-temperature resistant lead 7 can be protected by the high-temperature resistant protective cover 9 during the point pressure clamping process to keep it intact and maintain high-temperature resistance.

[0026] like Figure 1 As shown, the end of the lead protection sleeve 8 away from the temperature conductive housing 2 is provided with a conical pressing portion 11, and the conical pressing portion 11 is used to protect the high temperature resistant lead 7 in the lead protection sleeve 8 from falling off.

[0027] In this embodiment, by setting the end of the lead protection sleeve 8 away from the temperature conductive shell 2 as a conical clamping portion 11, the high temperature resistant lead 7 can be reduced from being pulled off and damaged. The conical clamping portion 11 is based on an external clamping tool to clamp one end of the lead protection sleeve 8 to deform it into a cone.

[0028] like Figure 1 As shown, the end of the high temperature resistant lead wire 7 away from the temperature measuring element 4 is connected with a deformable pressing end head 12, and the deformable pressing end head 12 is matched and connected with a terminal on an external temperature measuring circuit.

[0029] In this embodiment, a deformation method is used to compress the end of the high-temperature resistant lead 7 away from the temperature measuring element 4, so that it becomes a deformed and compressed end 12 that matches the terminal on the external temperature measurement circuit. This greatly facilitates the connection between the high-temperature resistant lead 7 and the terminal on the external temperature measurement circuit, and improves measurement efficiency to a certain extent.

[0030] like Figure 1 As shown, a mounting hole 1 is provided at one end of the temperature-conducting housing 2 away from the high-temperature-resistant lead 7 , and the temperature-conducting housing 2 is fixedly connected to the temperature-measured component through the mounting hole 1 .

[0031] In this embodiment, a mounting hole 1 is provided on the temperature conductive housing 2, and the temperature conductive housing 2 is fixedly installed at a position where the temperature of the aluminum electrolytic cell needs to be detected based on the mounting hole 1. The temperature at the position where the temperature of the aluminum electrolytic cell needs to be detected is conducted to the high temperature resistant thermal conductive layer 3 through the temperature conductive housing 2, and finally the temperature data is transmitted to the external temperature measurement circuit by the temperature measuring element 4, thereby realizing the detection of the temperature of the aluminum electrolytic cell.

[0032] The above is a detailed introduction to a thermal resistor for measuring the temperature of an aluminum electrolytic cell provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A thermal resistor for measuring temperature in an aluminum electrolytic cell, characterized in that: The invention comprises a temperature-conducting housing (2), a temperature-measuring element (4) and a high-temperature-resistant lead wire (7); the temperature-conducting housing (2) is connected to a temperature-measured component for conducting the temperature of the temperature-measured component; the temperature-measuring element (4) is fixedly arranged in the inner cavity of the temperature-conducting housing (2); a high-temperature-resistant heat-conducting layer (3) for uniformly conducting temperature is filled between the temperature-measuring element (4) and the temperature-conducting housing (2); one end of the high-temperature-resistant lead wire (7) is connected to the temperature-measuring element (4); the other end of the high-temperature-resistant lead wire (7) passes through the temperature-conducting housing (2) and is connected to an external temperature measurement circuit for transmitting a temperature signal of the temperature-measuring element (4).

2. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 1, characterized in that: The inner cavity of the temperature-conducting housing (2) is provided with a ceramic insulating tube (5), the temperature measuring element (4) comprises a temperature sensor placed in the ceramic insulating tube (5), and the temperature measuring element (4) is fixedly connected to one end of the high-temperature resistant lead wire (7) via the temperature sensor.

3. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 2, characterized in that: The temperature sensor and the high temperature resistant lead wire (7) are fixed by laser welding.

4. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 3, characterized in that: It also includes a lead protection sleeve (8), one end of which is placed in the inner cavity of the temperature-conducting shell (2) and sleeved on the high-temperature resistant lead (7), and the other end of which is placed outside the temperature-conducting shell (2) and away from the high-temperature area of ​​the aluminum electrolytic cell.

5. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 4, characterized in that: One end opening of the temperature-conducting housing (2) is a point-pressing clamping opening (10), and a high-temperature-resistant protective sleeve (9) is provided in the point-pressing clamping opening (10). The high-temperature-resistant protective sleeve (9) is located between the lead protection sleeve (8) and the high-temperature-resistant lead (7) and is used to protect the high-temperature-resistant lead (7) during the point-pressing clamping process of the temperature-conducting housing (2).

6. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 4, characterized in that: The lead protection sleeve (8) is provided with a conical pressing portion (11) at one end away from the temperature-conducting housing (2), and the conical pressing portion (11) is used to prevent the high-temperature-resistant lead (7) in the lead protection sleeve (8) from falling off.

7. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 1, characterized in that: One end of the high temperature resistant lead wire (7) away from the temperature measuring element (4) is connected to a deformable pressing end head (12), and the deformable pressing end head (12) is matched and connected to a terminal on an external temperature measuring circuit.

8. The thermal resistor for measuring temperature of an aluminum electrolytic cell according to claim 1, characterized in that: An installation hole (1) is provided at one end of the temperature-conducting housing (2) away from the high-temperature-resistant lead wire (7), and the temperature-conducting housing (2) is fixedly connected to the temperature-measured component via the installation hole (1).

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