Blowing mechanism for smelting and impurity removal of intermediate frequency furnace

Abstract

The utility model discloses a blowing mechanism for smelting and impurity removal of an intermediate frequency furnace, a direction adjuster is slidably mounted on a support and locked through a locking bolt, a blowing pipe is mounted on the direction adjuster, and the air inlet end of the blowing pipe is communicated with external air supply equipment through a hose; the direction adjusting device comprises rod bodies and sliding sleeves, the two sliding sleeves are arranged in parallel and rotationally connected, the two sliding sleeves are locked through locking bolts, and the two rod bodies are installed in the two sliding sleeves in a sliding mode respectively and locked through the locking bolts. The air blowing pipe is of a double-layer pipe structure and is provided with a hollow clamping cavity. According to the blowing mechanism, the air outlet direction and the spatial position of the blowing pipe are adjusted through the direction adjuster, the blowing mechanism better adapts to the height of the liquid level in the intermediate frequency furnace, it is guaranteed that oxygen comes out from the interior of molten metal, and the oxidation slagging impurity removal effect is guaranteed; a heat insulation layer is formed in the hollow clamping cavity of the air blowing pipe, low-temperature oxygen is prevented from directly absorbing the temperature of the molten metal, it is guaranteed that the temperature rises continuously when the oxygen flows into the molten metal, the molten metal is prevented from being solidified and peeled, and the fluidity of the molten metal is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of intermediate frequency furnaces, in particular to a blowing mechanism for impurity removal in intermediate frequency furnace smelting. Background Art

[0002] As one of the casting equipment often used in metal melting experiments, a small intermediate frequency furnace needs to blow oxygen through an oxygen lance during the actual intermediate frequency furnace smelting process to oxidize and remove impurities in the molten metal. When the existing intermediate frequency furnace blows oxygen, the oxygen lance is inconvenient to use, mainly in that: first, the position is fixed, and it is inconvenient for workers to adjust the height and position of the oxygen lance. For example, when the liquid level is too shallow, the muzzle position of the oxygen lance is above the molten metal surface, and oxygen cannot enter the molten metal, resulting in insufficient reaction; second, when oxygen directly enters the molten metal through the oxygen lance, near the surface layer of the oxygen lance and the molten metal, due to external environment and other reasons, low-temperature oxygen or air will cause the molten metal to condense and peel near the surface layer of the molten metal, affecting the fluidity of the molten metal and being unfavorable for the impurity removal work. Content of the Utility Model

[0003] The purpose of the utility model is to provide a blowing mechanism for impurity removal in intermediate frequency furnace smelting, so as to solve the problems that when the existing intermediate frequency furnace blows oxygen, the oxygen lance is inconvenient to use, one is that the height is inconvenient to adjust, and the other is that low-temperature oxygen will affect the fluidity of the molten metal.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A blowing mechanism for impurity removal in intermediate frequency furnace smelting includes a bracket, a direction adjuster and a blowing pipe. The direction adjuster is slidably installed on the bracket and locked by a locking bolt. The blowing pipe is installed on the direction adjuster, and the air inlet end of the blowing pipe is communicated with an external air supply device through a hose;

[0006] The direction adjuster includes a rod body and a sliding sleeve. The two sliding sleeves are arranged in parallel and rotatably connected between them, and are locked by a locking bolt between the two sliding sleeves. The two rod bodies are respectively slidably installed in the two sliding sleeves and locked by a locking bolt;

[0007] The blowing pipe is of a double-layer pipe structure and is provided with a hollow cavity.

[0008] A further technical solution is that a one-way valve is arranged at the bottom of the blowing pipe.

[0009] A further technical solution is as follows: The one-way valve includes a tension spring, a ball plug, a slider with a vent hole, and a support rod. The slider is slidably installed in the blow pipe. The tension spring and the ball plug are both located in the blow pipe. Two ends of the tension spring are respectively connected to the slider and the blow pipe. The tension spring tightens the slider to press the ball plug tightly. The ball plug blocks the vent hole and the air outlet end of the blow pipe. The support rod is installed in the blow pipe, and the top of the support rod passes through the vent hole and is adapted to the ball plug.

[0010] A further technical solution is as follows: A groove adapted to the ball plug is provided at the top of the slider.

[0011] A further technical solution is as follows: The ball plug is an iron ball.

[0012] A further technical solution is as follows: The distance between the support rod and the air outlet end of the blow pipe is greater than the maximum diameter of the ball plug.

[0013] A further technical solution is as follows: The blow pipe is a graphite pipe.

[0014] Compared with the prior art, at least one of the following beneficial effects can be achieved by the present utility model:

[0015] The present utility model provides a blowing mechanism for impurity removal in medium-frequency furnace smelting. The blowing mechanism can adjust the air outlet direction and spatial position of the blow pipe through a direction adjuster, better adapt to the height of the liquid level in the medium-frequency furnace, ensure that oxygen comes out from inside the molten metal, and guarantee the effect of oxidation slagging and impurity removal. In addition, the hollow cavity of the blow pipe can form a heat insulation layer to prevent low-temperature oxygen from directly absorbing the temperature of the molten metal, ensure that oxygen continuously heats up during the process of flowing into the molten metal, avoid solidification and peeling of the molten metal, and guarantee the fluidity of the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a blowing mechanism for impurity removal in medium-frequency furnace smelting according to the present utility model.

[0017] Figure 2 is a schematic structural diagram of the present utility model.

[0018] Figure 3 is a schematic structural diagram of the present utility model.

[0019] Figure 4 is a schematic structural diagram of the present utility model.

[0020] Reference numerals: 1, support; 2, direction adjuster; 3, blow pipe; 4, rod body; 5, sliding sleeve; 6, one-way valve; 7, tension spring; 8, ball plug; 9, slider; 10, support rod; 11, vent hole; 12, hollow cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0023] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0024] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] As shown in this embodiment Figure 1 and Figure 2 a blowing mechanism for impurity removal in medium-frequency furnace smelting includes a bracket 1, an aligner 2 and a blowpipe 3. The aligner 2 is slidably installed on the bracket 1 and locked by a locking bolt. The blowpipe 3 is installed on the aligner 2, and the intake end of the blowpipe 3 is communicated with an external gas supply device through a hose. The aligner 2 includes a rod body 4 and a sliding sleeve 5. The two sliding sleeves 5 are arranged in parallel and rotatably connected between them, and are locked by a locking bolt between the two sliding sleeves 5. The two rod bodies 4 are respectively slidably installed in the two sliding sleeves 5 and locked by a locking bolt. The blowpipe 3 is a double-layer pipe structure and is provided with a hollow cavity 12.

[0029] During blowing, according to the metal liquid level in the medium-frequency furnace, the blowing angle and position of the blowpipe 3 are controlled by the aligner 2. First, the radius length of the blowpipe 3 in the medium-frequency furnace is controlled by relying on the two rod bodies 4. Secondly, the blowing angle and a certain height of the blowpipe 3 in the medium-frequency furnace are controlled by rotating the sliding sleeve 5. Finally, the overall height of the blowpipe 3 is controlled by the overall height of the aligner 2 on the bracket 1. In addition, the hollow cavity 12 of the blowpipe 3 can form a heat insulation layer between the oxygen and the metal liquid, preventing the low-temperature oxygen from directly absorbing the temperature of the metal liquid and causing the metal liquid to solidify and peel, so that the oxygen continuously heats up during the process of flowing into the metal liquid, ensuring the fluidity of the metal liquid.

[0030] Embodiment 2:

[0031] On the basis of the above embodiment, this embodiment shows that a check valve 6 is provided at the bottom of the blowpipe 3.

[0032] The check valve 6 can prevent the metal liquid from flowing back into the blowpipe 3.

[0033] Embodiment 3:

[0034] On the basis of the above embodiment, as shown in this embodiment Figure 3 and Figure 4 it shows that the check valve 6 includes a tension spring 7, a ball plug 8, a slider 9 with a vent hole 11 and a support rod 10. The slider 9 is slidably installed in the blowpipe 3. The tension spring 7 and the ball plug 8 are both located in the blowpipe 3. The two ends of the tension spring 7 are respectively connected to the slider 9 and the blowpipe 3. The tension spring 7 tightens the slider 9 to press the ball plug 8 tightly. The ball plug 8 blocks the vent hole 11 and the outlet end of the blowpipe 3. The support rod 10 is installed in the blowpipe 3, and the top of the support rod 10 passes through the vent hole 11 and is adapted to the ball plug 8.

[0035] When the air blowing pipe 3 is not ventilated, the tension spring 7 pulls the slider 9 upward, and the ball plug 8 blocks the vent hole 11 of the slider 9 and the outlet end of the air blowing pipe 3 to achieve double sealing. When the air blowing pipe 3 is ventilated, the air pressure pushes the slider 9 downward, and the ball plug 8 moves away from the outlet end of the air blowing pipe 3, releasing the first seal, but the air blowing pipe 3 is still not fully ventilated. The ball plug 8 continues to descend with the slider 9 until the support rod 10 supports the ball plug 8. At this time, the ball plug 8 is separated from the slider 9, releasing the second seal, and the air blowing pipe 3 is fully ventilated, blowing air into the molten metal in the medium frequency furnace.

[0036] Preferably, a groove matching the ball plunger 8 is provided on the top of the sliding block 9 .

[0037] The groove is used to position and limit the ball plug 8, and when sealing and blocking the vent hole 11 of the slider 9 and the air outlet end of the air blowing pipe 3, the position of the ball plug 8 is ensured and it will not shake easily.

[0038] Preferably, the ball plug 8 is an iron ball.

[0039] The melting point of the iron ball is higher than that of copper, and the iron ball has a large mass, so that the ball plug 8 continues to descend with the slider 9, and the second seal is always maintained when the air blowing pipe 3 is not fully ventilated and the air source is turned off.

[0040] Preferably, the distance between the support rod 10 and the air outlet end of the air blowing tube 3 is greater than the maximum diameter of the ball plug 8 .

[0041] Leave space to release the second seal.

[0042] Preferably, the air blowing tube 3 is a graphite tube.

[0043] The graphite tube is resistant to high temperature and corrosion and has a long service life.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blowing mechanism for smelting and removing impurities in a medium frequency furnace, characterized in that: It comprises a bracket (1), a steering device (2) and an air blowing pipe (3), wherein the steering device (2) is slidably mounted on the bracket (1) and locked by a locking bolt, and the air blowing pipe (3) is mounted on the steering device (2), and an air inlet end of the air blowing pipe (3) is connected to an external air supply device through a hose; The steering device (2) comprises a rod body (4) and a sliding sleeve (5), wherein the two sliding sleeves (5) are arranged in parallel and are rotatably connected to each other, and the two sliding sleeves (5) are locked by a locking bolt, and the two rod bodies (4) are respectively slidably mounted in the two sliding sleeves (5) and are locked by the locking bolt; The air blowing pipe (3) is a double-layer pipe structure and is provided with a hollow clamping cavity (12).

2. The blowing mechanism for smelting and impurity removal in a medium frequency furnace according to claim 1 is characterized in that: A one-way valve (6) is provided at the bottom of the air blowing pipe (3).

3. The blowing mechanism for smelting and removing impurities in a medium frequency furnace according to claim 2 is characterized in that: The one-way valve (6) comprises a tension spring (7), a ball plug (8), a slider (9) with an air vent (11) and a support rod (10); the slider (9) is slidably mounted in the air blowing pipe (3); the tension spring (7) and the ball plug (8) are both located in the air blowing pipe (3); two ends of the tension spring (7) are respectively connected to the slider (9) and the air blowing pipe (3); the tension spring (7) tightens the slider (9) to press the ball plug (8); the ball plug (8) blocks the air vent (11) and the air outlet end of the air blowing pipe (3); the support rod (10) is mounted in the air blowing pipe (3); and the top of the support rod (10) passes through the air vent (11) and is adapted to the ball plug (8).

4. The blowing mechanism for smelting and removing impurities in a medium frequency furnace according to claim 3 is characterized in that: The top of the sliding block (9) is provided with a groove matched with the ball plunger (8).

5. The blowing mechanism for smelting and removing impurities in a medium frequency furnace according to claim 3 is characterized in that: The ball plug (8) is an iron ball.

6. The blowing mechanism for smelting and removing impurities in a medium frequency furnace according to claim 3 is characterized in that: The distance between the support rod (10) and the air outlet end of the air blowing pipe (3) is greater than the maximum diameter of the ball plug (8).

7. The blowing mechanism for smelting and removing impurities in a medium frequency furnace according to claim 1 is characterized in that: The air blowing tube (3) is a graphite tube.

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