Furnace gas distribution device

Abstract

The utility model relates to the technical field of annealing gas circulation, and discloses an in-furnace gas distribution device which comprises a furnace body, a gas guide mechanism and a rotary blowing mechanism, an annealing bin is arranged in the furnace body, sealing doors are arranged on the two sides of the furnace body and used for sealing the annealing bin, a gas inlet pipe is fixedly connected to the top of the furnace body, and a gas outlet pipe is fixedly connected to the bottom of the furnace body. The air inlet pipe is communicated with the interior of the annealing bin, the air guide mechanism comprises an air guide plate, an adjusting plate and an adjusting mechanism, the air guide plate is fixedly connected to the inner wall of the annealing bin and located below the air inlet pipe, and the adjusting plate is hinged to the lower surface of the air guide plate through a rotating shaft. When gas enters the annealing bin from the gas inlet pipe at the top, the gas guide plate can distribute the concentrated gas to two sides, so that the situation that the gas directly contacts with the steel wire to cause decarburization of the steel wire is prevented.

Description

Technical Field

[0001] This utility model relates to the field of annealing gas circulation technology, specifically to a furnace gas distribution device. Background Technology

[0002] In the heat treatment process of steel wire, annealing is a key process to improve the mechanical properties of the material. Through the heating-holding-cooling process, cold working stress can be effectively eliminated, grain structure can be refined and material phase composition can be adjusted, thereby significantly improving the plasticity, toughness and fatigue resistance of steel wire. As a continuous protective atmosphere annealing equipment, the STC annealing furnace introduces nitrogen-based protective gas into the furnace to isolate oxygen and inhibit the oxidation and decarburization reaction of steel wire.

[0003] However, existing protective gas supply methods have certain shortcomings: traditional designs inject protective gas vertically downwards from the furnace top inlet, directly impacting the coiled steel wire stacks located at the bottom of the furnace. This direct-blowing method leads to excessively high local airflow velocities, causing intense convective heat transfer between the protective atmosphere and the high-temperature steel wire surface. Under thermodynamic imbalance, this triggers abnormal carburization, resulting in excessive carbon content on the steel wire surface, severely affecting the product's mechanical properties and subsequent processing performance. Therefore, a device is needed to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a furnace gas distribution device that solves the problem of decarburization of steel wire caused by direct contact between protective gas and steel wire.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a furnace gas distribution device, including a furnace body, a gas guiding mechanism and a rotary blowing mechanism, wherein an annealing chamber is provided inside the furnace body, and sealing doors are provided on both sides of the furnace body to close the annealing chamber; an air inlet pipe is fixedly connected to the top of the furnace body, and the air inlet pipe communicates with the interior of the annealing chamber.

[0006] The gas guiding mechanism includes a gas guiding plate, an adjusting plate, and an adjusting mechanism. The gas guiding plate is fixedly connected to the inner wall of the annealing chamber and located below the gas inlet pipe. The adjusting plate is hinged to the lower surface of the gas guiding plate via a rotating shaft. The adjusting mechanism is located on the inner top wall of the annealing chamber to adjust the tilt angle of the adjusting plate.

[0007] The rotary blowing mechanism is located on the inner wall of the annealing chamber to adjust the direction of gas blowing.

[0008] Optionally, the adjustment mechanism includes a servo motor, a winding reel, and a connecting line. The servo motor is fixedly connected to the inner top wall of the annealing chamber. The winding reel is fixedly connected to the output end of the servo motor via a pin. The connecting line is wound around the outer surface of the winding reel, and the other end of the connecting line is fixedly connected to the upper surface of the adjustment plate.

[0009] Optionally, the end of the adjusting plate away from the air guide plate has an upward-facing rolled edge.

[0010] Optionally, the rotary blowing mechanism includes a drive motor and a rotating block. The drive motor is fixedly connected to one side of the furnace body, and the output end of the drive motor penetrates into the inner wall of the annealing chamber. The rotating block is fixedly connected to the output end of the drive motor to disturb the airflow.

[0011] Optionally, the inner wall of the furnace body is provided with a gas supply pipe, which is connected to the gas inlet pipe. The other end of the gas supply pipe is connected to the interior of the rotating block. One side of the rotating block is provided with a gas guide hole, which is connected to the gas supply pipe to discharge gas.

[0012] Optionally, the bottom of the furnace body is provided with a conveying guide rail, and the top of the conveying guide rail is slidably connected with a placement rack to support the coiled steel wire.

[0013] Optionally, the top of the placement rack is provided with a cover plate, and a threaded rod is fixedly connected to the middle of the placement rack. The threaded rod passes through the cover plate, and a fixing nut is threadedly connected to the top of the threaded rod. The lower surface of the fixing nut is in contact with the upper surface of the cover plate.

[0014] This utility model provides a gas distribution device for an in-furnace, which has the following beneficial effects:

[0015] This invention provides a furnace gas distribution device. Through the coordinated arrangement of a gas guide plate, an adjusting plate, and an adjusting mechanism, when gas enters the annealing chamber from the top inlet pipe, the gas guide plate can divert the concentrated gas to both sides to prevent direct contact between the gas and the steel wire, thus preventing decarburization. Simultaneously, in conjunction with the adjusting mechanism and adjusting plate, the tilt angle of the adjusting plate can be adjusted according to the pressure of the incoming gas to adapt to different situations. The rotating blowing mechanism further diverts the protective gas in the inlet pipe, reducing direct contact between the gas and the steel wire. Simultaneously, the rotating outlet gas can collide with the gas entering from the upper inlet pipe, creating turbulence and further reducing the possibility of decarburization of the steel wire. Through the coordinated arrangement of the furnace body, annealing chamber, and sealing door, the sealing door can seal the annealing chamber during the annealing process, reducing gas leakage. Furthermore, the inlet pipe located above the furnace body further reduces protective gas leakage, thereby lowering processing costs. Attached Figure Description

[0016] Figure 1 This is a side sectional view of the structure of this utility model;

[0017] Figure 2 This is a front cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the external structure of the furnace body of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the rotary air blowing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure on the back of the rotating block of this utility model.

[0021] In the diagram: 1. Furnace body; 2. Annealing chamber; 3. Inlet pipe; 4. Air guide plate; 5. Adjusting plate; 6. Steering motor; 7. Winding reel; 8. Connecting line; 9. Drive motor; 10. Rotating block; 11. Gas supply pipe; 12. Sealing door; 13. Air guide hole; 14. Conveying guide rail; 15. Placement rack; 16. Cover plate; 17. Threaded rod; 18. Fixing nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1 to 5 This utility model provides a technical solution: a gas distribution device in a furnace, including a furnace body 1, a gas guiding mechanism and a rotary blowing mechanism. An annealing chamber 2 is provided inside the furnace body 1. Sealing doors 12 are provided on both sides of the furnace body 1 to close the annealing chamber 2. An air inlet pipe 3 is fixedly connected to the top of the furnace body 1 and the air inlet pipe 3 communicates with the interior of the annealing chamber 2.

[0024] The gas guiding mechanism includes a gas guiding plate 4, an adjusting plate 5, and an adjusting mechanism. The gas guiding plate 4 is fixedly connected to the inner wall of the annealing chamber 2 and located below the gas inlet pipe 3. The adjusting plate 5 is hinged to the lower surface of the gas guiding plate 4 via a rotating shaft. The adjusting mechanism is located on the inner top wall of the annealing chamber 2 to adjust the tilt angle of the adjusting plate 5.

[0025] After the steel wire is placed in the annealing chamber 2, the sealing door 12 can be lowered to seal the annealing chamber 2. Protective gas is delivered into the annealing chamber 2 from the top air inlet pipe 3. After filling the annealing chamber 2, it protects the steel wire to prevent oxidation. During the process of the protective gas entering the annealing chamber 2, the gas guide plate 4 can divert the gas in the air inlet pipe 3 to prevent high-concentration gas from directly contacting the high-temperature steel wire and causing decarburization. After the gas is diverted, it comes into contact with the steel wire, which reduces the possibility of decarburization. The adjusting plates 5 on both sides can rotate around the rotating shaft to adjust the lifting height of the two ends of the adjusting plates 5, thereby adjusting the direction of gas flow along the adjusting plates 5.

[0026] In this embodiment, as a preferred option, the adjustment mechanism includes a servo motor 6, a winding wheel 7, and a connecting line 8. The servo motor 6 is fixedly connected to the inner top wall of the annealing chamber 2. The winding wheel 7 is fixedly connected to the output end of the servo motor 6 by a pin. The connecting line 8 is wound around the outer surface of the winding wheel 7, and the other end of the connecting line 8 is fixedly connected to the upper surface of the adjustment plate 5. The end of the adjustment plate 5 away from the air guide plate 4 is provided with an upward-facing rolled edge.

[0027] Servo motor 6 can drive the fixed winding wheel 7 at the output end to rotate. During the rotation of the winding wheel 7, the external connecting cable 8 can be retracted or extended. When the connecting cable 8 is retracted, the connecting cable 8 pulls up the adjusting plate 5 at one end, raising the height of the adjusting plate 5 so that the gas flows upward. When the connecting cable 8 is extended, the adjusting plate 5 at one end can be lowered by gravity, lowering the height of the adjusting plate 5 so that the gas flows downward. The chamfer setting can generate an upward force when the gas flows out of the adjusting plate 5, so that it can collide with the gas above to form turbulence and further accelerate the gas mixing.

[0028] A rotary blowing mechanism is located on the inner wall of the annealing chamber 2 to adjust the direction of gas blowing.

[0029] In this embodiment, as a preferred option, the rotary blowing mechanism includes a drive motor 9 and a rotating block 10. The drive motor 9 is fixedly connected to one side of the furnace body 1, and the output end of the drive motor 9 penetrates into the inner wall of the annealing chamber 2. The rotating block 10 is fixedly connected to the output end of the drive motor 9 to disturb the airflow. The inner wall of the furnace body 1 is provided with a gas supply pipe 11, which is connected to the gas inlet pipe 3. The other end of the gas supply pipe 11 is connected to the interior of the rotating block 10. One side of the rotating block 10 is provided with a gas guide hole 13, which is connected to the gas supply pipe 11 to discharge gas.

[0030] The drive motor 9 drives the rotating block 10 at one end to rotate. The protective gas in the intake pipe 3 can enter the gas delivery pipe 11 through the three-way pipe. The protective gas entering the gas delivery pipe 11 will be delivered to one side of the rotating block 10. The rotating block 10 is provided with a gas guide hole 13. During the rotation of the rotating block 10, the rotating block 10 is connected to the gas delivery pipe 11, so that the protective gas in the gas delivery pipe 11 can continuously enter the rotating block 10 and then be discharged from the gas guide hole 13 at one end of the rotating block 10. Since the rotating block 10 is constantly rotating, the gas discharged from the rotating block 10 will be distributed in different directions, further aggravating the turbulence in the annealing chamber 2 and making the gas mixing more uniform.

[0031] In this embodiment, as a preferred option, the bottom of the furnace body 1 is provided with a conveying guide rail 14, and the top of the conveying guide rail 14 is slidably connected with a placement frame 15 to support the coiled steel wire. The top of the placement frame 15 is provided with a cover plate 16, and a threaded rod 17 is fixedly connected to the middle of the placement frame 15. The threaded rod 17 passes through the cover plate 16, and the top of the threaded rod 17 is threadedly connected with a fixing nut 18. The lower surface of the fixing nut 18 is in contact with the upper surface of the cover plate 16.

[0032] The placement rack 15 can slide laterally on the conveying guide rail 14. The sealing door 12 has a notch below it that matches the conveying guide rail 14 to improve the sealing effect of the sealing door 12. After the cover plate 16 is installed on the placement rack 15, the cover plate 16 can cover the coiled steel wire from above, further reducing the possibility of excessively concentrated protective gas coming into direct contact with the steel wire. After tightening the fixing nut 18, the fixing nut 18 can press the cover plate 16 down to fix the coiled steel wire below. At the same time, the placement rack 15 has an upward protruding boss on top, which limits the outer diameter of the coiled steel wire to prevent the steel wire from spreading out.

[0033] In this invention, the working steps of the device are as follows:

[0034] 1. Place the coiled steel wire in the placement rack 15, fasten the cover plate 16 onto the threaded rod 17 in the middle of the placement rack 15, and use the fixing nut 18 to fix the position of the cover plate 16. After fixing, send the placement rack 15 to the annealing chamber 2 through the conveying pipe, close the sealing doors 12 on both sides, and introduce protective gas into the annealing chamber 2.

[0035] 2. Adjust the length of the connecting rope as needed to adjust the angle of the adjusting plate 5. Start the drive motor 9 during the annealing process to make the rotating block 10 rotate out the protective gas, further accelerating the mixing speed.

[0036] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0037] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gas distribution device for a furnace, characterized in that: The furnace includes a furnace body (1), an air guiding mechanism and a rotary air blowing mechanism. An annealing chamber (2) is provided inside the furnace body (1). Sealing doors (12) are provided on both sides of the furnace body (1) to close the annealing chamber (2). An air inlet pipe (3) is fixedly connected to the top of the furnace body (1), and the air inlet pipe (3) communicates with the interior of the annealing chamber (2). The gas guiding mechanism includes a gas guiding plate (4), an adjusting plate (5) and an adjusting mechanism. The gas guiding plate (4) is fixedly connected to the inner wall of the annealing chamber (2) and located below the air inlet pipe (3). The adjusting plate (5) is hinged to the lower surface of the gas guiding plate (4) by a rotating shaft. The adjusting mechanism is located on the inner top wall of the annealing chamber (2) to adjust the tilt angle of the adjusting plate (5). The rotary blowing mechanism is located on the inner wall of the annealing chamber (2) to adjust the direction of gas blowing.

2. The in-furnace gas distribution device according to claim 1, characterized in that: The adjustment mechanism includes a servo motor (6), a winding wheel (7), and a connecting line (8). The servo motor (6) is fixedly connected to the inner top wall of the annealing chamber (2). The winding wheel (7) is fixedly connected to the output end of the servo motor (6) by a pin. The connecting line (8) is wound around the outer surface of the winding wheel (7), and the other end of the connecting line (8) is fixedly connected to the upper surface of the adjustment plate (5).

3. The furnace gas distribution device according to claim 2, characterized in that: The end of the adjusting plate (5) away from the air guide plate (4) has an upward-facing rolled edge.

4. A furnace gas distribution device according to any one of claims 1-3, characterized in that: The rotary blowing mechanism includes a drive motor (9) and a rotating block (10). The drive motor (9) is fixedly connected to one side of the furnace body (1). The output end of the drive motor (9) penetrates into the inner wall of the annealing chamber (2). The rotating block (10) is fixedly connected to the output end of the drive motor (9) to disturb the airflow.

5. A gas distribution device for a furnace according to claim 4, characterized in that: The inner wall of the furnace body (1) is provided with a gas supply pipe (11), which is connected to the gas inlet pipe (3). The other end of the gas supply pipe (11) is connected to the interior of the rotating block (10). A gas guide hole (13) is provided on one side of the rotating block (10), which is connected to the gas supply pipe (11) to discharge gas.

6. A furnace gas distribution device according to any one of claims 1-3, characterized in that: The bottom of the furnace body (1) is provided with a conveying guide rail (14), and the top of the conveying guide rail (14) is slidably connected with a placement rack (15) to support the coiled steel wire.

7. A gas distribution device for a furnace according to claim 6, characterized in that: The top of the placement rack (15) is provided with a cover plate (16), and a threaded rod (17) is fixedly connected to the middle of the placement rack (15). The threaded rod (17) passes through the cover plate (16), and a fixing nut (18) is threadedly connected to the top of the threaded rod (17). The lower surface of the fixing nut (18) is in contact with the upper surface of the cover plate (16).

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