Flow guide device for improving temperature uniformity in annealing furnace

Abstract

The utility model relates to the field of annealing furnaces, in particular to a flow guide device for improving temperature uniformity in an annealing furnace, which comprises an air inlet pipeline arranged in a furnace chamber, and two parallel pipelines which are parallel to each other and are attached to the inner side wall of the furnace chamber, the connecting pipeline is arranged between the two parallel pipelines and communicated with the two parallel pipelines, a plurality of nozzles perpendicular to the parallel pipelines are evenly arranged on the side faces, close to each other, of the two parallel pipelines, and air outlets are formed in the end faces, away from the connecting pipeline, of the parallel pipelines. An impact surface is arranged on the inner side wall of the furnace chamber, and air can vertically impact on the impact surface after being exhausted from the air outlet. The method has the effect of improving the temperature uniformity in the furnace chamber.

Description

Technical Field

[0001] The present application relates to the technical field of annealing furnaces, and in particular to a flow guiding device for improving temperature uniformity in an annealing furnace. Background Art

[0002] Annealing furnace is a common process heat treatment equipment, mainly used in annealing process. Annealing furnace heats up the furnace by circulating heated air.

[0003] Typically, a hot air channel is provided in the annealing furnace, and heating of the furnace is achieved by injecting hot air into the furnace. For example, a rapid annealing furnace is disclosed in the utility model patent with publication number CN202989213U, in which an air outlet duct is provided inside the furnace body, and hot air is injected into the furnace body through the air outlet duct, thereby achieving heating of the furnace.

[0004] During use, the annealing furnace in the related art has the problem that the air duct distributes the air unevenly in the furnace, which affects the annealing effect of the products in the furnace. Utility Model Content

[0005] In order to improve the uniformity of the temperature inside the furnace cavity, the present application provides a flow guiding device for improving the temperature uniformity inside the annealing furnace.

[0006] The present application provides a flow guide device for improving temperature uniformity in an annealing furnace using the following technical solutions:

[0007] A flow guide device for improving temperature uniformity in an annealing furnace comprises an air inlet duct arranged inside a furnace cavity, the air inlet duct comprising two parallel ducts which are parallel to each other and arranged in contact with the inner side wall of the furnace cavity, and a connecting duct arranged between the two parallel ducts and connected to the two parallel ducts, a plurality of nozzles facing perpendicular to the parallel ducts are evenly arranged on the sides of the two parallel ducts which are close to each other, an air outlet is arranged on the end face of the parallel duct away from the connecting duct, an impact surface is provided on the inner side wall of the furnace cavity, and air can vertically impact the impact surface after being discharged from the air outlet.

[0008] By adopting this technical solution, hot air is introduced into the connecting pipe and divided into two parallel pipes. It is then ejected from the nozzle or discharged through the air outlet. The air discharged from the air outlet flows perpendicularly to the air discharged from the nozzle. The air discharged from the air outlet strikes the impact surface and then disperses in all directions, forming a turbulent flow. This turbulent air stirs the air inside the furnace cavity, thereby uniformizing the temperature inside the furnace and improving temperature uniformity.

[0009] Optionally, two groups of guide plates are provided on the impact surface corresponding to the two parallel pipes, and the guide plates are used to guide the air impacting the impact surface to move in a direction away from the impact surface.

[0010] By adopting the above technical solution, the guide plate guides the air away from the impact surface, so that the air flowing in the direction perpendicular to the impact surface is increased, the effect of stirring the air in the furnace is improved, and the temperature uniformity in the furnace is further improved.

[0011] Optionally, the guide plate includes an inlet end and an outlet end, the outlet end is an end away from the parallel pipe, and the outlet end is bent in a direction away from the impact surface.

[0012] By adopting the above technical solution, the lead-out end is bent in the direction away from the impact surface. After the air impacts the guide plate, it moves along the side wall of the guide plate, causing the air to move in the direction away from the impact surface, thereby guiding the air.

[0013] Optionally, each group of the guide plates is provided in plurality, and the plurality of the guide plates are spaced apart in a direction parallel to the direction of the nozzle, the lead-out ends of the guide plates are flush in a direction perpendicular to the impact surface, and the vertical distance between the lead-in end and the impact surface gradually decreases in the direction of the nozzle.

[0014] By adopting the above technical solution, after the air impacts the impact surface, part of the air moving in a direction parallel to the nozzle direction contacts the first guide plate, while part of the air moves away from the impact surface from the position corresponding to the first guide plate. The air that cannot contact the first guide plate moves toward the second guide plate. Then, part of the air contacts the second guide plate and moves away from the impact surface from the position of the second guide plate. In actual operation, different positions on the impact surface will generate air moving away from the impact surface, thereby improving the stirring effect on the air inside the furnace cavity.

[0015] Optionally, the guide plate is an arc-shaped plate.

[0016] By adopting the above technical solution, the guide plate is set as an arc-shaped plate to achieve air guidance, and at the same time can reduce the resistance of the air when it moves along the guide plate.

[0017] Optionally, an adjustment plate is provided at the air outlet, and the adjustment plate is rotatably connected to the parallel pipe. Rotating the adjustment plate can change the size of the air outlet.

[0018] By adopting the above technical solution, the air outlet can be expanded or reduced by rotating the adjustment plate, which makes it convenient for workers to adjust the air flow at the air outlet according to actual production conditions and to cope with different production conditions.

[0019] Optionally, a pressure reducing plate is provided on the impact plate, and the pressure reducing plate is an arc-shaped plate, the opening of the pressure reducing plate faces the guide plate, one end of the pressure reducing plate is tangent to the impact surface, and the other end is tangent to the side wall of the parallel pipe facing away from the nozzle.

[0020] By adopting the above technical solution, the air is guided by the pressure reducing plate to move in the direction close to the guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0022] Figure 2 This is an embodiment of the present application Figure 1 Enlarged view of part A.

[0023] Figure 3 It is a schematic diagram of the guide plate structure of an embodiment of the present application.

[0024] Figure numerals: 1. air inlet duct; 11. parallel duct; 12. connecting duct; 13. nozzle; 2. air outlet; 3. impact surface; 4. guide plate; 41. inlet end; 42. outlet end; 43. regulating plate; 44. pressure reducing plate; 5. furnace cavity; 6. connecting plate. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-2 This application is described in further detail.

[0026] The embodiment of the present application discloses a flow guiding device for improving the temperature uniformity in an annealing furnace.

[0027] Reference Figure 1 and Figure 2 A flow guide device for improving the temperature uniformity in an annealing furnace includes an air inlet duct 1 fixed to the inside of the furnace body by screws. The air inlet duct 1 includes two parallel ducts 11 and a connecting duct 12. The two parallel ducts 11 are parallel to each other and are respectively arranged in contact with the inner side walls of the furnace cavity 5. The connecting duct 12 is arranged between the two parallel ducts 11, and the two ends of the connecting duct 12 are respectively connected to the two parallel ducts 11 to form a U-shaped structure. Air inlet holes (not shown in the figure) are provided on the parallel ducts 11. After the hot air enters the connecting duct 12, it is diverted into the two parallel ducts 11. A plurality of nozzles 13 facing perpendicular to the parallel ducts 11 are evenly arranged on the side walls of the parallel ducts 11 that are close to each other. After the hot air enters the parallel ducts 11, it is ejected into the furnace cavity 5 by the nozzles 13.

[0028] Reference Figure 1 and Figure 2An air outlet 2 is provided on the end surface of parallel duct 11, facing away from connecting duct 12, allowing air within parallel duct 11 to flow out from the end of parallel duct 11. The side of furnace cavity 5 perpendicular to parallel duct 11 and facing away from connecting duct 12 is defined as impact surface 3. After air flows out of air outlet 2, it impacts impact surface 3, whereupon it diffuses into the surrounding area. Some air moves perpendicular to impact surface 3, stirring the air within furnace cavity 5 and improving temperature uniformity within the cavity.

[0029] Reference Figure 1 and Figure 2 For the convenience of description, two groups of guide plates 4 are provided on the impact surface 3 corresponding to the two parallel pipes 11, and the guide plates 4 are in an arc-shaped structure. When the air diffuses on the impact surface 3, it includes air moving in a direction parallel to the impact surface 3 and away from the parallel pipes 11. The guide plates 4 are used to guide this part of the air to move in a direction away from the impact surface 3. For the convenience of description, the air ejected from the nozzle 13 is defined as direct current air, and the air moving in a direction away from the impact surface 3 is defined as turbulent air. After the air is ejected from the air outlet 2 and impacts the impact surface 3, turbulent air moving in a direction away from the impact surface 3 is formed under the action of the guide plates 4, thereby increasing the amount of turbulent air, improving the stirring effect on the air in the furnace, and further improving the temperature uniformity in the furnace.

[0030] Reference Figure 1 and Figure 3 In this embodiment, the guide plate 4 is an arc-shaped structure, and the opening of the guide plate 4 faces the parallel pipe 11. The guide plate 4 bends along the direction parallel to the impact surface 3 from the side close to the parallel pipe 11 to the side away from the parallel pipe 11 in the direction away from the impact surface 3 to achieve the guidance of the disturbed air. In this embodiment, the guide plate 4 is an arc-shaped plate. For the convenience of description, the two ends of the arc trajectory line of the guide plate 4 are defined as the introduction end 41 and the lead-out end 42 respectively. The tangent of the position of the guide plate 4 corresponding to the introduction end 41 is parallel to the impact surface 3, and the tangent corresponding to the position of the lead-out end 42 is perpendicular to the impact surface 3, thereby being able to change the flow direction of the air to improve the guiding effect of the disturbed air.

[0031] Reference Figure 1 and Figure 3 To further improve temperature uniformity within the furnace, each set of guide plates 4 includes multiple guide plates 4. These guide plates 4 are spaced apart in a direction parallel to the direction of the nozzle 13, and each guide plate 4 has a different radius. The axes of the guide plates 4 lie on the same plane parallel to the impact surface 3, so that the inlet ends 41 of the guide plates 4 are spaced apart in a direction perpendicular to the impact surface 3. The portion of the turbulent air moving in a direction parallel to the impact surface 3 impacts different guide plates 4, which then guide the air from different positions toward the center of the furnace cavity 5.

[0032] Reference Figure 1 and Figure 3 The impact surface 3 is provided with a connecting plate 6 for securing the guide plate 4. This connecting plate 6 is arranged perpendicular to the impact surface 3 and the axis of the guide plate 4, securing the guide plate 4 while minimizing its impact on air flow. During operation, the multiple guide plates act to generate multiple, evenly spaced air currents on the impact surface 3, each moving perpendicularly to the impact surface 3. These air currents stir the air within the furnace cavity 5 from different locations, further improving the temperature uniformity within the furnace cavity 5.

[0033] Reference Figure 1 and Figure 3 In this embodiment, three guide plates 4 are provided, and the radii of the guide plates 4 gradually increase along a direction parallel to the injection direction. The radii of the guide plates 4 are R1, R2, R3, ..., respectively, where R1:R2:R3...Rn=1:2:3...n, and R1+R2+R3+...+Rn=H, where H is the vertical distance between the end surface of the parallel pipe 11 close to the impact surface 3 and the impact surface 3.

[0034] Reference Figure 1 and Figure 2 An adjusting plate 43 is provided at the air outlet 2, and the adjusting plate 43 is rotatably provided on the inner wall of the parallel pipe 11 away from the nozzle 13. By rotating the adjusting plate 43, the size of the air outlet 2 can be changed, and the flow rate of the air sprayed out by the nozzle can be controlled, which is convenient for the staff to adjust the pressure in the parallel pipe 11 according to the actual temperature conditions in the furnace, so as to make the temperature in the furnace uniform.

[0035] Reference Figure 1 and Figure 2 A pressure reducing plate 44 is provided between the impact surface 3 and the parallel pipe 11. The pressure reducing plate 44 is an arc-shaped plate, and one end is tangent to the impact surface 3, and the other end is tangent to the side wall of the parallel pipe 11 away from the nozzle 13, so as to guide the turbulent air to move in the direction close to the guide plate 4.

[0036] The implementation principle of a flow guide device for improving the temperature uniformity in an annealing furnace in an embodiment of the present application is as follows: an opening is set at one end of the parallel pipe 11 away from the connecting pipe 12, so that the air ejected from the parallel pipe 11 impacts the impact surface 3. Under the action of the impact surface 3, turbulent air is formed that diverges to the surroundings, stirs the air inside the furnace cavity 5, and improves the temperature uniformity inside the furnace cavity 5.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flow guide device for improving temperature uniformity in an annealing furnace, comprising an air inlet duct (1) arranged inside a furnace cavity (5), characterized in that: The air inlet duct (1) comprises two parallel ducts (11) which are parallel to each other and arranged in contact with the inner wall of the furnace cavity (5), and further comprises a connecting duct (12) which is arranged between the two parallel ducts (11) and is in communication with the two parallel ducts (11). A plurality of nozzles (13) which are oriented perpendicular to the parallel ducts (11) are evenly arranged on the sides of the two parallel ducts (11) which are close to each other. An air outlet (2) is arranged on the end face of the parallel duct (11) which is away from the connecting duct (12). An impact surface (3) is arranged on the inner wall of the furnace cavity (5), and air can vertically impact the impact surface (3) after being discharged from the air outlet (2).

2. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 1, characterized in that: Two groups of guide plates (4) are provided on the impact surface (3) corresponding to the two parallel pipes (11), and the guide plates (4) are used to guide the air impacting the impact surface (3) to move in a direction away from the impact surface (3).

3. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 2, characterized in that: The guide plate (4) comprises an inlet end (41) and an outlet end (42), wherein the outlet end (42) is an end away from the parallel pipe (11), and the outlet end (42) is bent in a direction away from the impact surface (3).

4. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 3, characterized in that: Each group of guide plates (4) is provided in plurality, and the plurality of guide plates (4) are spaced apart in a direction parallel to the direction of the nozzle (13); the lead-out ends (42) of the guide plates (4) are aligned in a direction perpendicular to the impact surface (3); and the vertical distance between the lead-in end (41) and the impact surface (3) gradually decreases in the direction of the nozzle (13).

5. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 4, characterized in that: The guide plate (4) is an arc-shaped plate.

6. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 1, characterized in that: An adjustment plate (43) is provided at the air outlet (2), and the adjustment plate (43) is rotatably connected to the parallel pipe (11). Rotating the adjustment plate (43) can change the size of the air outlet (2).

7. The flow guiding device for improving temperature uniformity in an annealing furnace according to claim 6, characterized in that: A pressure reducing plate (44) is provided on the impact surface (3). The pressure reducing plate (44) is an arc-shaped plate. The opening of the pressure reducing plate (44) faces the guide plate (4). One end of the pressure reducing plate (44) is tangent to the impact surface (3), and the other end is tangent to the side wall of the parallel pipe (11) facing away from the nozzle (13).

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