Energy-saving hot air circulation structure of stainless steel coil plate continuous annealing furnace

Abstract

The utility model belongs to stainless steel coiled plate processing field especially, it is a kind of energy -conserving type hot air circulation structure of stainless steel coiled plate continuous annealing furnace, the existing annealing furnace's inner wall both sides cannot blow hot air, while bottom upward blowing, the direction of blowing is more fixed, resulting in the problem that the heat distribution of annealing furnace inner wall is not enough uniform, present and propose the following scheme, including annealing furnace main part and two hot air machines, two hot air machines are fixed in annealing furnace main part top, the symmetry of annealing furnace main part both sides inner wall is provided with multiple vertical pipes, and vertical pipe is communicated with hot air machine air outlet by connecting pipe;The relatively symmetrical two vertical pipes are fixedly communicated first jet pipe by approaching side, and vertical pipe gas outlet end is communicated with second jet pipe;In the utility model, through swing type hot air injection and circulation air suction structure combination PLC intelligent regulation and control, realize heat efficient coverage and dynamic regulation, give consideration to heating uniformity and energy -conserving demand, significantly reduce the energy consumption and cost of stainless steel coiled plate annealing process.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel coil processing technology, and in particular to an energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils. Background Technology

[0002] The main function of a stainless steel annealing furnace is to eliminate internal stress in stainless steel materials, improve their plasticity and toughness, thereby enhancing their physical and mechanical properties. Furthermore, annealing can eliminate intergranular corrosion, hardening, and cold work effects, improving the material's corrosion resistance and processing performance. Through annealing, stainless steel materials can better meet the needs of various industrial applications.

[0003] A search revealed a hot air circulation system for an annealing furnace in utility model publication CN210736835U.

[0004] When this hot air circulation structure is in use, the hot air can only be blown upwards from the bottom. Hot air cannot be blown on the sides of the inner wall of the annealing furnace. At the same time, the direction of the air blowing upwards from the bottom is relatively fixed, which results in an uneven heat distribution on the inner wall of the annealing furnace. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to blow hot air on both sides of the inner wall of the annealing furnace and the relatively fixed direction of air blowing when blowing air upwards from the bottom, resulting in uneven heat distribution on the inner wall of the annealing furnace. Therefore, this invention proposes an energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils includes the furnace body and two hot air blowers. Two hot air blowers are fixed to the top of the annealing furnace body. Multiple vertical pipes are symmetrically arranged on the inner walls of both sides of the annealing furnace body. The vertical pipes are connected to the air outlets of the hot air blowers through connecting pipes. Two symmetrical vertical pipes are fixedly connected to the first jet pipe on their side close to each other, and the air outlet end of the vertical pipe is connected to the second jet pipe. A gear is fixedly sleeved on the outer wall of the second jet pipe. A mounting bracket is fixedly installed on one side of the annealing furnace body. A sliding plate is slidably fitted inside the mounting bracket. A first rack that meshes with the gear is fixedly installed on the top of the sliding plate. The mounting frame is equipped with a drive mechanism, which includes a sliding frame, a half gear, and a drive motor. The sliding frame is connected to the sliding plate through a connecting frame, and a second rack is provided on the inner wall of the sliding frame.

[0007] In one possible design, multiple second jet pipes have perforated tubes at both ends, a rotating sleeve is fixedly connected to the bottom end of the vertical pipe, and the perforated tube rotates inside. One end of multiple perforated tubes located on one side is fixedly connected to a connecting shaft, which passes through the mounting bracket, and a gear is fixedly sleeved on the outer wall of the connecting shaft.

[0008] In one possible design, a second rack is fixedly installed on both the top and bottom inner walls of the sliding frame. The half gear rotates and engages within the mounting bracket, and a drive motor is fixedly installed within the mounting bracket. The output shaft of the drive motor is fixedly connected to one end of the rotating shaft of the half gear via a universal coupling.

[0009] In one possible design, multiple sets of air inlet pipes are fixedly installed inside the main body of the annealing furnace. The air inlet end of the air inlet pipe is connected to the air inlet pipe, and the air outlet end is connected to the air inlet end of the hot air blower to form a hot air circulation channel.

[0010] In one possible design, air holes are evenly arranged on the surfaces of the first and second jet pipes, with the air holes distributed at equal intervals along the length of the pipe body. The vertical pipes are evenly arranged along the height of the annealing furnace body, and two symmetrical vertical pipes form a symmetrical jet group. Multiple jet groups are spaced apart along the width of the annealing furnace body.

[0011] In one possible design, a PLC controller is also included. The PLC controller is electrically connected to the hot air blower and the drive motor, and adjusts the power of the hot air blower and the start / stop frequency of the drive motor according to the temperature sensor signal.

[0012] In this application, hot air is discharged through multiple air outlets of the annealing furnace body. The air outlet pipe at the bottom of the hot air blower is connected to the connecting pipe, and is connected to the vertical pipe through the connecting pipe. At the same time, the first jet pipe on one side of the two vertical pipes blows air, and the two vertical pipes on one side of the two vertical pipes are fitted with a second jet pipe through a rotating sleeve. Hot air is sprayed out through the second jet pipe. At this time, the drive motor on one side of the annealing furnace body is started. The output shaft of the drive motor drives the half gear to rotate through the universal coupling. The half gear meshes with the two second racks in the sliding frame in sequence, thereby driving the sliding plates at both ends to move through the sliding frame. The sliding frame moves left and right, thereby driving the sliding plates to move. The multiple first racks on the top of the sliding plates mesh with multiple gears, thereby driving the second jet pipe to spray hot air in an oscillating manner. After being absorbed through the air intake hole of the air inlet pipe, the hot air enters the hot air blower through the air inlet pipe. The two hot air blowers and the drive motor are controlled by a PLC controller to turn on and off.

[0013] Beneficial effects: In this utility model, the energy-saving hot air circulation structure of the stainless steel coil continuous annealing furnace is achieved by using multiple sets of symmetrically arranged vertical pipes in conjunction with the second jet pipe, and by using the meshing transmission of the first rack and gear to realize the nozzle swing exhaust, thereby expanding the hot air coverage area and reducing the temperature dead zone in the furnace. Combined with the circulating air intake design of the air inlet pipe, it significantly improves the hot air utilization rate and heating uniformity, and reduces energy consumption. In this utility model, the energy-saving hot air circulation structure of the stainless steel coil continuous annealing furnace adopts a PLC controller to precisely control the start and stop of two sets of hot air blowers and drive motors. Combined with the drive motor driving the second rack and half gear, the exhaust component is automatically reciprocated, which avoids local overheating and reduces ineffective idling. Through the synergistic effect of structural optimization and intelligent control, the thermal energy utilization efficiency is further improved. In this invention, the combination of oscillating hot air jet and circulating suction structure with PLC intelligent control achieves efficient heat coverage and dynamic adjustment, taking into account both heating uniformity and energy-saving requirements, and significantly reducing the energy consumption and cost of the stainless steel coil annealing process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils proposed in this utility model. Figure 2 This is a schematic diagram of the vertical pipe of an energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils proposed in this utility model. Figure 3 An exploded structural diagram of the hollow tube of the energy-saving hot air circulation structure of the continuous annealing furnace for stainless steel coils proposed in this utility model. Figure 4 This is a partial structural diagram of the second jet pipe and sliding plate of an energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils proposed in this utility model.

[0015] In the diagram: 1. Annealing furnace body; 2. Hot air blower; 3. Connecting pipe; 4. Vertical pipe; 5. First air jet pipe; 6. Air inlet pipe; 7. Second air jet pipe; 8. Sliding plate; 9. Drive motor; 10. Rotating sleeve; 11. Gear; 12. First rack; 13. Sliding frame; 14. Second rack; 15. Half gear; 16. Connecting frame; 17. Mounting frame; 18. Connecting shaft; 19. Hollowed-out tube. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In one embodiment: Refer to Figures 1 to 4 An energy-saving hot air circulation structure for a continuous annealing furnace is disclosed. Two hot air blowers 2 are fixedly installed on the top of the furnace body 1. The air outlets of the hot air blowers 2 are connected to the air inlets of multiple vertical pipes 4 symmetrically arranged on both sides of the inner wall of the furnace body 1 via connecting pipes 3. The vertical pipes 4 on each side are evenly arranged along the height of the furnace body 1. Two symmetrical vertical pipes 4 are fixedly connected to a first jet pipe 5, which is close to one side. Air blowing holes are evenly distributed on the surface of the first jet pipe 5. The air outlet of the vertical pipe 4 is rotatably sleeved onto a perforated tube 19 at the end of a second jet pipe 7 via a rotating sleeve 10, and enters the second jet pipe 7 through the perforated tube 19. Air blowing holes are evenly distributed on the surface of the second jet pipe 7. One end of one of the multiple perforated tubes 19 located on one side is fixedly connected to a connecting shaft 18, which extends rotatably into a mounting frame 17.

[0018] It is only necessary to know that: the sliding plate 8, drive motor 9, gear 11, first rack 12, sliding frame 13, second rack 14, half gear 15 and connecting frame 16 are all located outside the annealing furnace body 1. This transmission component is not affected by the high temperature environment.

[0019] Reference Figure 4 A sliding plate 8 is slidably disposed inside the mounting bracket 17. The top of the sliding plate 8 is fixedly connected to a first rack 12 that meshes with a gear 11. The gear 11 is fixedly sleeved on the connecting shaft 18. The number of first racks 12 corresponds to the number of second jet pipes 7. The bottom of the sliding plate 8 is fixedly connected to both ends of the sliding frame 13 through a connecting bracket 16. The sliding frame 13 is slidably connected inside the mounting bracket 17, and one side of the mounting bracket 17 can be opened to facilitate maintenance of the sliding frame 13 and related components. The top and bottom inner walls of the sliding frame 13 are fixedly connected to second racks 14. A half gear 15 is rotatably connected inside the mounting bracket 17. A drive motor 9 is installed inside the mounting bracket 17 and drives the half gear 15 to rotate through a universal coupling. The half gear 15 meshes with the second racks 14 at the top and bottom of the sliding frame 13 in sequence.

[0020] Reference Figure 2 Multiple sets of air inlet pipes are fixedly installed inside the annealing furnace body 1. The air inlet end of the air inlet pipe is connected to the air outlet end of the air inlet pipe 6, and the air outlet end of the air inlet pipe is connected to the air inlet end of the hot air blower 2. Air blowing holes are evenly opened on the surface of the first air jet pipe 5 and the second air jet pipe 7, and the air blowing holes are evenly distributed along the length of the pipe body.

[0021] Reference Figures 1 to 4During operation, the hot air blower 2 delivers heated hot air to the vertical pipe 4 through the connecting pipe 3. The hot air is then split by the vertical pipe 4 to the first jet pipe 5 and the second jet pipe 7, and sprayed into the annealing furnace through the air blowing holes. After the drive motor 9 starts, the output shaft drives the half gear 15 to rotate. When the half gear 15 meshes with the second rack 14 at the top of the sliding frame 13, it pushes the sliding frame 13 to one side. When the half gear 15 rotates to mesh with the second rack 14 at the bottom of the sliding frame 13, it pushes the sliding frame 13 to the other side, realizing the reciprocating motion of the sliding frame 13. The sliding frame 13 drives the sliding plate 8 to move back and forth synchronously through the connecting frame 16. The first rack 12 at the top of the sliding plate 8 meshes with the gear 11 on the outer wall of the connecting shaft 18, driving the second jet pipe 7 to swing back and forth around the rotating sleeve 10 as the axis, expanding the hot air spray range. When the second jet pipe 7 swings, it enters the air through the hollow tube 19 inside the rotating sleeve 10 and connects with the bottom end of the vertical pipe 4.

[0022] This application can be used in the field of stainless steel coil processing, or in other fields applicable to this application.

[0023] In another embodiment: Reference Figures 1 to 4 An energy-saving hot air circulation structure for a continuous annealing furnace of stainless steel coils is disclosed. Applied to the stainless steel coil processing field, the air inlet pipe 6 draws some of the hot air from the annealing furnace into the air intake pipe, which is then reheated by the hot air blower 2 and recycled. The PLC controller, based on signals from the temperature sensor inside the annealing furnace, controls the heating power of the hot air blower 2 and the start / stop of the drive motor 9, adjusting the hot air jet intensity and the oscillation frequency of the second jet pipe 7 to achieve dynamic heat distribution. Through the symmetrical arrangement of multiple sets of vertical pipes 4 and jet pipes, combined with the oscillating hot air jet and circulating suction structure, dead zones in the furnace temperature are reduced, improving hot air utilization and heating uniformity.

[0024] However, as is well known to those skilled in the art, the working principles and wiring methods of the hot air blower 2 and the drive motor 9 are conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0025] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving hot air circulation structure for a continuous annealing furnace for stainless steel coils, comprising an annealing furnace body (1) and two hot air blowers (2), characterized in that: Two hot air blowers (2) are fixed to the top of the annealing furnace body (1). Multiple vertical pipes (4) are symmetrically arranged on the inner walls of both sides of the annealing furnace body (1). The vertical pipes (4) are connected to the air outlet of the hot air blower (2) through the connecting pipe (3). Two symmetrical vertical pipes (4) are fixedly connected to the first jet pipe (5) on their close side, and the air outlet of the vertical pipe (4) is connected to the second jet pipe (7); The outer wall of the second jet pipe (7) is fixedly fitted with a gear (11), and a mounting bracket (17) is fixedly installed on one side of the annealing furnace body (1). The mounting bracket (17) is slidably fitted with a sliding plate (8) inside, and a first rack (12) that meshes with the gear (11) is fixedly installed on the top of the sliding plate (8). The mounting bracket (17) is equipped with a drive mechanism, which includes a sliding frame (13), a half gear (15) and a drive motor (9). The sliding frame (13) is connected to the sliding plate (8) through a connecting bracket (16), and a second rack (14) is provided on the inner wall of the sliding frame (13).

2. The energy-saving hot air circulation structure of a continuous annealing furnace for stainless steel coils according to claim 1, characterized in that: Both ends of the multiple second jet pipes (7) are provided with hollow tubes (19). The bottom end of the vertical pipe (4) is fixedly connected to a rotating sleeve (10), and the hollow tubes (19) rotate inside the rotating sleeve (10). One end of the multiple hollow tubes (19) located on one side is fixedly connected to a connecting shaft (18). The connecting shaft (18) passes through the mounting frame (17), and the gear (11) is fixedly sleeved on the outer wall of the connecting shaft (18).

3. The energy-saving hot air circulation structure of a continuous annealing furnace for stainless steel coils according to claim 1 or 2, characterized in that: The sliding frame (13) has a second rack (14) fixedly installed on the top inner wall and bottom inner wall. The half gear (15) is rotatably fitted in the mounting frame (17). The mounting frame (17) has a drive motor (9) fixedly installed in it. The output shaft of the drive motor (9) is fixedly connected to one end of the rotating shaft of the half gear (15) of the universal coupling.

4. The energy-saving hot air circulation structure of a continuous annealing furnace for stainless steel coils according to claim 1, characterized in that: Multiple sets of air inlet pipes are fixedly installed inside the main body (1) of the annealing furnace. The air inlet end of the air inlet pipe is connected to the air inlet pipe (6), and the air outlet end is connected to the air inlet end of the hot air blower (2) to form a hot air circulation channel.

5. The energy-saving hot air circulation structure of a continuous annealing furnace for stainless steel coils according to claim 1, characterized in that: Air holes are evenly arranged on the surface of the first jet pipe (5) and the second jet pipe (7), and the air holes are evenly distributed along the length of the pipe body; The vertical pipes (4) are evenly arranged along the height direction of the annealing furnace body (1), and two symmetrical vertical pipes (4) form symmetrical jet groups. Multiple jet groups are spaced apart along the width direction of the annealing furnace body (1).

6. The energy-saving hot air circulation structure of a continuous annealing furnace for stainless steel coils according to claim 1, characterized in that: It also includes a PLC controller, which is electrically connected to the hot air blower (2) and the drive motor (9) and adjusts the power of the hot air blower (2) and the start and stop frequency of the drive motor (9) according to the temperature sensor signal.

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