A bottom argon blowing structure for an induction furnace

Abstract

The utility model discloses a kind of for the bottom argon blowing structure of induction furnace, belong to induction furnace field technical field.The application includes gas diffuser;Gas diffuser includes gas pipe, shell and gas-permeable block;Gas-permeable block is set in shell;Gas outlet is opened on shell;One end of gas pipe is inserted into shell, and is communicated with gas-permeable block;Still include: gas delivery assembly;Gas delivery assembly includes controller, argon gas supply device, first pipeline, range sensor and first control valve;One end of first pipeline is connected with the end of gas pipe away from gas-permeable block, and its other end is connected with the output end of argon gas supply device;Range sensor is located directly above induction furnace, and its detection end is towards the bottom in induction furnace;First control valve is set on first pipeline;Controller is connected with first control valve, range sensor circuit.The application detects the increase or reduction of metal liquid inside induction furnace by range sensor, changes the flow of argon gas delivery, realizes the automatic regulation of argon gas flow.

Description

Technical Field

[0001] This utility model belongs to the field of induction furnace technology, specifically relating to a bottom argon blowing structure for an induction furnace. Background Technology

[0002] Argon blowing into melt involves introducing high-purity argon gas into molten metal. It's a commonly used technique in the metallurgical industry, effectively removing non-metallic inclusions and harmful gases, thus purifying the molten metal. Currently, induction furnace bottom argon blowing technology is mainly divided into two categories: traditional and pre-embedded. Traditional argon blowing uses porous permeable bricks placed on the furnace bottom plane, in contact with the molten metal inside the furnace, which can easily clog the gas passages. Pre-embedded argon blowing involves embedding a gas diffuser under the induction furnace lining material. The top of the gas diffuser is covered with high-performance permeable material; argon gas passes through the diffuser and finally through this material into the induction furnace.

[0003] For example, utility model patent CN216337788U discloses a bottom-blowing argon structure for a non-vacuum induction furnace. This structure includes a non-vacuum induction furnace and a gas diffuser. The non-vacuum induction furnace comprises a furnace base, a furnace body, and a furnace lining. The gas diffuser is located at the bottom of the furnace lining. The gas diffuser includes multiple conveying pipes, a shell, and a permeable block. The conveying pipes are embedded in the furnace base, and the shell is embedded in the lower part of the furnace base. The upper end of the conveying pipe extends into the shell and connects to the permeable block. This patent employs a pre-embedded bottom-blowing argon structure. The permeable block is made of refractory material and is hydraulically fired at high temperatures. During argon blowing, the airflow is optimized and has resistance to metal penetration, reducing the impact on the furnace lining, preventing melt penetration, and extending the service life of the furnace lining. After passing through the permeable block, argon gas can generate microbubbles of micron size with strong adsorption capacity. After being blown into the melt, it can effectively adsorb non-metallic inclusions and harmful gases, improving the purity of the melt.

[0004] However, this argon blowing structure has a low level of intelligence; it cannot adjust the argon gas flow rate according to the molten metal level in the induction furnace, requiring on-site adjustment by operators, and it lacks anti-clogging functionality. Therefore, it is necessary to design an automatically adjustable flow rate bottom-blowing argon structure for induction furnaces. Utility Model Content

[0005] This invention provides a bottom argon blowing structure for an induction furnace to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A bottom-blowing argon structure for an induction furnace includes: a gas diffuser; the gas diffuser includes a gas supply pipe, a shell, and a permeable block; the permeable block is disposed inside the shell; the shell has a gas outlet; one end of the gas supply pipe extends into the shell and communicates with the permeable block; it also includes: a gas supply assembly; the gas supply assembly includes a controller, an argon gas supply device, a first pipe, a distance sensor, and a first control valve; one end of the first pipe is connected to the end of the gas supply pipe away from the permeable block, and the other end is connected to the output end of the argon gas supply device; the distance sensor is located directly above the induction furnace, with its detection end facing the bottom of the induction furnace; the first control valve is disposed on the first pipe; the controller is circuitically connected to the first control valve and the distance sensor.

[0007] As a further improvement to the technical solution, the gas transmission assembly also includes a pressure gauge; the pressure gauge is installed on the first pipeline.

[0008] As a further improvement to the technical solution, the pressure gauge is a digital pressure gauge; the pressure gauge is connected to the controller circuit.

[0009] As a further improvement to the technical solution, the pressure gauge is located between the gas supply pipe and the first control valve.

[0010] As a further improvement to the technical solution, the gas delivery assembly also includes a second pipe, a suction device, and a second control valve; one end of the second pipe is connected to the first pipe, and the other end is connected to the suction end of the suction device; the second control valve is disposed on the second pipe; the second control valve, the suction device, and the controller circuit are connected.

[0011] As a further improvement to the technical solution, both the first control valve and the second control valve are solenoid valves.

[0012] As a further improvement to the technical solution, the second control valve is located near the connection between the second pipeline and the first pipeline.

[0013] As a further improvement to the technical solution, the connection point between the second pipeline and the first pipeline is located between the first control valve and the gas supply pipe.

[0014] As a further improvement to the technical solution, the ranging sensor is an infrared ranging sensor.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In this application, the initial distance to the bottom of the induction furnace is first measured by a distance sensor. Then, molten metal is added to the induction furnace. The molten metal fills the inside of the induction furnace, causing a change in the distance detected by the distance sensor. The controller receives the data measured by the distance sensor and infers the increase or decrease of the molten metal inside the induction furnace based on the changes in the measurement data. If the molten metal inside the induction furnace increases, the controller increases the flow rate of the first control valve, thereby increasing the flow rate of argon gas. If the molten metal inside the induction furnace decreases, the controller decreases the flow rate of the first control valve, thereby decreasing the flow rate of argon gas. This achieves automatic adjustment of the argon gas flow rate, resulting in a high degree of automation. Argon gas enters the gas delivery pipe from the first pipe. After entering the gas delivery pipe, the argon gas is delivered to the permeable block. After being dispersed by the permeable block, the argon gas is discharged from the gas outlet of the outer shell and finally enters the inside of the induction furnace. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the bottom-blowing argon structure for an induction furnace according to the present invention. Figure 1 ; Figure 2 Structural schematic diagram provided for this utility model Figure 2 ; Figure 3 The structural principle diagram provided for this utility model; Reference numerals: 1-Gas diffuser, 11-Gas supply pipe, 12-Shell, 13-Ventilating block, 2-Gas supply assembly, 21-Controller, 22-Argon supply device, 23-First pipeline, 24-Distance sensor, 25-First control valve, 26-Pressure gauge, 27-Second pipeline, 28-Evacuation device, 29-Second control valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0019] The terms "first," "second," and similar words used in this utility model application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1: like Figures 1 to 3As shown, a bottom-blown argon structure for an induction furnace includes: a gas diffuser 1 and a gas delivery assembly 2; the gas diffuser 1 is disposed at the bottom of the induction furnace, and a high-performance permeable material is disposed on the top surface of the gas diffuser 1; the gas diffusion cloth 1 includes a gas delivery pipe 11, a shell 12, and a permeable block 13; the permeable block 13 is disposed on the shell 12; an outlet is provided on the shell 12; one end of the gas delivery pipe 11 extends into the shell 12 and communicates with the permeable block 13; argon gas enters from the gas delivery pipe 11 and is delivered into the permeable block 13; after being dispersed by the permeable block 13, the argon gas is discharged from the outlet of the shell 12 and finally enters the interior of the induction furnace; the gas delivery assembly 2 includes a controller 21, an argon gas supply device 22, a first pipe 23, a ranging sensor 24, and a first control valve 25. One end of the first pipe 23 is connected to the end of the gas supply pipe 11 away from the vent block 13, and the other end is connected to the output end of the argon supply device 22. The argon supply device 22 supplies argon to the gas supply pipe 11 through the first pipe 23. The argon supply device 22 can be an argon tank. The ranging sensor 24 is located directly above the induction furnace, with its detection end facing the bottom of the induction furnace to detect the liquid level inside the furnace. Preferably, the ranging sensor 24 is an infrared ranging sensor. The controller 21 and the argon supply device 22 are both located outside the induction furnace. The first control valve 25 is installed on the first pipe 23 and is used to control the opening and closing of the first pipe 23. Preferably, the first control valve 25 is a solenoid valve. The controller 21 is electrically connected to the first control valve 25 and the ranging sensor 24. It should also be noted that the gas diffuser is prior art, and the connection method between the controller, the first control valve, and the ranging sensor is a conventional connection. The specific models of the controller, the first control valve, and the ranging sensor are not improvements of this application and will not be described here.

[0022] Work style: In operation, the initial distance to the bottom of the induction furnace is first measured by the distance sensor 24. Then, molten metal is added to the furnace, filling it and causing a change in the distance detected by the distance sensor 24. The controller 21 receives the data from the distance sensor 24 and, based on the changes in the data, infers whether the molten metal inside the furnace has increased or decreased. If the molten metal increases, the controller 21 increases the flow rate of the first control valve 25, thereby increasing the flow rate of argon gas. If the molten metal decreases, the controller 21 decreases the flow rate of the first control valve 25, thereby decreasing the flow rate of argon gas. This achieves automatic adjustment of the argon gas flow rate, resulting in a high degree of automation. Argon gas enters the gas delivery pipe 11 from the first pipe 23. After entering the gas delivery pipe 11, the argon gas is delivered to the permeable block 13. After being dispersed by the permeable block 13, the argon gas is discharged from the outlet of the outer shell 12 and finally enters the interior of the induction furnace. like Figure 2 and Figure 3As shown, preferably, the gas delivery assembly 2 further includes a pressure gauge 26; the pressure gauge 26 is disposed on the first pipe 23, preferably, the pressure gauge 26 is located between the gas delivery pipe 11 and the first control valve 25, and the pressure gauge 26 detects the gas pressure on the first pipe 23; preferably, the pressure gauge 26 is a digital pressure gauge; the pressure gauge 26 is electrically connected to the controller 21, and the pressure gauge 26 delivers the gas pressure on the first pipe 23 to the controller 21. When the gas pressure on the first pipe 23 increases abnormally, it indicates that there is a blockage on the gas diffuser 1, thereby realizing the monitoring of the gas diffuser 1.

[0023] like Figure 2 and Figure 3 As shown, preferably, the gas supply assembly 2 further includes a second pipe 27, a suction device 28, and a second control valve 29; one end of the second pipe 27 is connected to the first pipe 23, and the other end is connected to the suction end of the suction device 28, which can be a dry screw vacuum pump; the second control valve 29 is disposed on the second pipe 27, and controls the opening and closing of the second pipe 27. Preferably, the second control valve 29 is a solenoid valve, and is located near the connection between the second pipe 27 and the first pipe 23; the second pipe 27 The connection point with the first pipe 23 is located between the first control valve 25 and the gas supply pipe 11; the second control valve 29, the extraction device 28, and the controller 21 are electrically connected; during gas supply, the second control valve 29 is closed and the first control valve 25 is opened. When it is necessary to clean impurities that have accidentally seeped into the gas diffuser 1, the first control valve 25 is closed, the second control valve 29 is opened, the inner bottom of the induction furnace is covered, and then the extraction device 28 is started. The extraction device 28 sucks up the impurities on the gas diffuser 1 and discharges them after passing through the second pipe 27. In addition, it should be noted that the connection method between the controller, the extraction device, and the second control valve is a conventional connection. The specific models of the extraction device and the second control valve are not improvements of this application and will not be described in detail here.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bottom-blown argon structure for an induction furnace, comprising a gas diffuser (1); the gas diffuser (1) comprising a gas supply pipe (11), a shell (12), and a permeable block (13); the permeable block (13) is disposed within the shell (12); an outlet is provided on the shell (12); one end of the gas supply pipe (11) extends into the shell (12) and communicates with the permeable block (13); characterized in that, Also includes: Gas delivery assembly (2); the gas delivery assembly (2) includes a controller (21), an argon gas supply device (22), a first pipeline (23), a distance sensor (24), and a first control valve (25); one end of the first pipeline (23) is connected to the end of the gas delivery pipe (11) away from the gas permeable block (13), and the other end is connected to the output end of the argon gas supply device (22); the distance sensor (24) is located directly above the induction furnace, and its detection end faces the bottom of the induction furnace; the first control valve (25) is set on the first pipeline (23); the controller (21) is electrically connected to the first control valve (25) and the distance sensor (24).

2. The bottom-blowing argon structure for an induction furnace according to claim 1, characterized in that, The gas delivery assembly (2) also includes a pressure gauge (26); the pressure gauge (26) is installed on the first pipeline (23).

3. The bottom-blowing argon structure for an induction furnace according to claim 2, characterized in that, The pressure gauge (26) is a digital pressure gauge; the pressure gauge (26) is connected to the controller (21) by circuit.

4. The bottom-blowing argon structure for an induction furnace according to claim 2, characterized in that, The pressure gauge (26) is located between the gas supply pipe (11) and the first control valve (25).

5. The bottom-blown argon structure for an induction furnace according to claim 2, characterized in that, The gas delivery assembly (2) further includes a second pipe (27), an air extraction device (28), and a second control valve (29); one end of the second pipe (27) is connected to the first pipe (23), and the other end is connected to the suction end of the air extraction device (28); the second control valve (29) is disposed on the second pipe (27); the second control valve (29), the air extraction device (28), and the controller (21) are electrically connected.

6. The bottom-blown argon structure for an induction furnace according to claim 5, characterized in that, Both the first control valve (25) and the second control valve (29) are solenoid valves.

7. The bottom-blown argon structure for an induction furnace according to claim 5, characterized in that, The second control valve (29) is located near the connection between the second pipe (27) and the first pipe (23).

8. The bottom-blowing argon structure for an induction furnace according to claim 5, characterized in that, The connection between the second pipe (27) and the first pipe (23) is located between the first control valve (25) and the gas supply pipe (11).

9. The bottom-blowing argon structure for an induction furnace according to any one of claims 1-8, characterized in that, The ranging sensor (24) is an infrared ranging sensor.

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