Oriented silicon steel high-temperature cover type annealing furnace and annealing method thereof

Abstract

The invention discloses an oriented silicon steel high-temperature bell-type annealing furnace and an annealing method thereof, and relates to the technical field of bell-type annealing furnaces, the oriented silicon steel high-temperature bell-type annealing furnace comprises a furnace base, an outer cover, a fuel gas inlet box, a fire-jet head, a first pull head, a placement pad and a sealing assembly, the outer cover is mounted at the top of the furnace base, and an inner cover is mounted at the top of the furnace base; a fuel gas inlet box is installed on the outer wall of the furnace base in a penetrating mode. A nitrogen detection head is installed and used for continuously detecting a real-time nitrogen concentration value until a processing module detects a low nitrogen concentration state, and when the processing module detects the low nitrogen concentration state, the processing module controls an electromagnetic valve to open a gas inlet pipe and open a gas outlet assembly; and the nitrogen detection head continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a proper state, so that the function of stably feeding the protective atmosphere in the bell-type annealing furnace to improve the production stability of the oriented silicon steel is realized.

Description

Technical Field

[0001] The invention relates to the technical field of bell-type annealing furnaces, in particular to a high-temperature bell-type annealing furnace for oriented silicon steel and an annealing method thereof. Background Art

[0002] Grain-oriented silicon steel, a soft magnetic material with high magnetic permeability and low iron loss, is widely used in power equipment such as transformers and motors. Its performance directly impacts the efficiency and energy consumption of these devices. High-temperature annealing is a key step in the production of grain-oriented silicon steel. This process aims to eliminate processing stress, improve crystal orientation, and form a dense magnesium oxide insulation layer, thereby enhancing the material's magnetic properties. To address these issues, high-temperature bell-type annealing furnaces have emerged. This technology combines the advantages of bell-type and continuous furnaces, employing a multi-stack structure capable of processing multiple steel coils simultaneously. The nitrogen atmosphere used is a key factor in the stable supply of protective atmosphere within existing bell-type annealing furnaces, compromising the stability of grain-oriented silicon steel production.

[0003] The defects of the existing bell annealing furnace are:

[0004] 1. Patent document CN113293280B discloses a continuous high-temperature bell-type annealing furnace for oriented silicon steel and its annealing process, "including a gradient kiln, the gradient kiln including an A1 section annealing furnace, a B section annealing furnace, a C section annealing furnace, a D1 section annealing furnace, an A2 section annealing furnace and a D2 section annealing furnace; the A1 section annealing furnace, the B section annealing furnace, the C section annealing furnace, the D1 section annealing furnace, the A2 section annealing furnace and the D2 section annealing furnace are connected in sequence; wherein the A1 section annealing furnace, the B section annealing furnace, the C section annealing furnace and the D1 ... Annealing furnaces have different roof heights: the A1 and A2 sections have the same roof height, while the D1 and D2 sections have the same roof height. This roof structure, based on the production process, employs a gradient, layered layout to create obstacles at the top, slowing airflow and achieving energy savings. This also improves temperature uniformity within each process section and enhances product quality. However, the protective atmosphere within existing bell-type annealing furnaces cannot be stably applied, reducing the stability of oriented silicon steel production.

[0005] 2. Patent document CN109136490A discloses an environmentally friendly processing equipment and method for oriented silicon steel, "including the following steps: A. placing the silicon steel strip on the cold rolling conveyor coil of the first cold rolling mill for cooling and pressurizing; B. the formed silicon steel strip enters the annealing furnace for high-temperature annealing; D. the silicon steel strip after secondary pressurization enters the decarburization annealing and coating unit for degreasing and decarburization, and is rinsed with hot water after coating; E. the silicon steel strip is transferred to a bell-type annealing furnace for high-temperature annealing, and the heat emitted by the bell-type annealing furnace is circulated to the heating water pipe of the decarburization annealing and coating unit to heat cold water. The degreasing, decarburization and coating treatments reduce the carbon content of the silicon steel to within the specified range, improve the magnetic level, eliminate stress, and enhance the insulation properties of the oriented silicon steel and the adhesion of the insulating coating. The heat recovery device collects a large amount of heat energy dissipated by the bell-type annealing furnace, achieving energy recycling and being more environmentally friendly." However, the inner cover of the existing bell-type annealing furnace cannot be tightly sealed, which reduces the annealing stability of the oriented silicon steel.

[0006] 3. Patent document CN116837206A discloses a continuous high-temperature bell-type annealing furnace for oriented silicon steel, "including a protective mechanism, an annealing furnace body mechanism is fixedly installed inside the protective mechanism, a first cooling mechanism is fixedly installed on the outer wall of the protective mechanism, a second cooling mechanism is fixedly installed inside the protective mechanism, the protective mechanism includes an outer protective shell, the top of the outer protective shell is covered with a top sealing cover plate, the top of the top sealing cover plate is connected to an exhaust pipe, the annealing furnace body mechanism includes an annealing furnace main body fixedly installed inside the outer protective shell, a supporting tray is rotatably installed at the bottom of the annealing furnace main body, and a base is fixedly installed at the bottom of the outer protective shell. The present invention enables the supporting tray to drive the silicon steel to rotate and move in the inner cavity of the annealing furnace main body, thereby keeping the silicon steel in an active state, increasing the gas circulation inside the annealing furnace main body, making the internal heat more concentrated, and heating the silicon steel more fully and evenly". However, the oriented silicon steel in the existing bell-type annealing furnace cannot be heated evenly, reducing the oriented silicon steel and improving the annealing quality;

[0007] 4. Patent document CN205669056U discloses a hydraulic system for driving a tunnel-type continuous high-temperature hood-type annealing furnace for oriented silicon steel. "The hydraulic system for driving a tunnel-type continuous high-temperature hood-type annealing furnace for oriented silicon steel has a trolley movably arranged on a guide rail inside the annealing furnace body and can move back and forth along the guide rail. The trolley is driven by a hydraulic system; the bracket in the hydraulic system is located on one side outside the annealing furnace body, the hydraulic pump station and the hydraulic oil cylinder are fixedly arranged on the bracket, and the cylinder body of the hydraulic oil cylinder is horizontally arranged on the bracket, the hydraulic oil pipe is used to connect the hydraulic oil cylinder and the hydraulic pump station to form an oil circuit circulation, and the protruding end of the cylinder body of the hydraulic oil cylinder is hinged on the trolley to drive the trolley to move back and forth; the utility model is used for driving the trolley of a tunnel-type continuous high-temperature hood-type annealing furnace for oriented silicon steel", but the furnace base and outer cover of the existing hood-type annealing furnace do not have quick clamping, which reduces the stability of the hood-type annealing furnace. Summary of the Invention

[0008] The object of the present invention is to provide a high-temperature bell-type annealing furnace for grain-oriented silicon steel and an annealing method thereof, so as to solve the technical problem in the background art mentioned above that the protective atmosphere in the bell-type annealing furnace cannot be stably supplied, which reduces the production stability of grain-oriented silicon steel.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-temperature bell-type annealing furnace for grain-oriented silicon steel, comprising a furnace base, an outer cover, a gas inlet box, a flame head, a No. 1 pull head, a placement pad and a sealing assembly, wherein the outer cover is installed on the top of the furnace base, the inner cover is installed on the top of the furnace base, the gas inlet box is installed through the outer wall of the furnace base, the flame head is installed on the inner wall of the outer cover, and the gas inlet box is connected to one end of the flame head through a pipeline, the No. 1 pull head is installed on the top of the outer cover, the placement pad is installed on the top of the furnace base, the air inlet pipe is installed through the inner wall of the furnace base, the gas outlet assembly is installed through the inner wall of the furnace base, and the sealing assembly is installed on the inner wall of the furnace base;

[0010] The gas outlet assembly includes an gas outlet pipe, a solenoid valve, and a nitrogen detection head. The gas outlet pipe passes through the inner wall of the furnace base, and one end of the gas outlet pipe passes through the outer wall of the placement pad. The solenoid valve is located on the inner walls of the gas inlet pipe and the gas outlet pipe. The nitrogen detection head is located on the inner wall of the gas outlet pipe. A processing module is installed on the inner wall of the furnace base. The processing module is electrically connected to the solenoid valve, and the processing module is electrically connected to the nitrogen detection head. The nitrogen detection head is used to detect the real-time nitrogen concentration value of the gas discharged from the gas outlet pipe. The processing module has a built-in suitable nitrogen concentration value of the gas discharged from the gas outlet pipe, and the suitable nitrogen concentration value is 93~97%.

[0011] Preferably, the real-time nitrogen concentration value of the gas discharged from the outlet pipe is transmitted to the processing module, and the real-time nitrogen concentration value of the gas discharged from the outlet pipe is compared with the appropriate nitrogen concentration value of the gas discharged from the outlet pipe by the processing module. If the real-time nitrogen concentration value of the gas discharged from the outlet pipe is within the appropriate nitrogen concentration value of the gas discharged from the outlet pipe, it is set as a suitable nitrogen concentration state; if the real-time nitrogen concentration value of the gas discharged from the outlet pipe is less than the appropriate nitrogen concentration value of the gas discharged from the outlet pipe, it is set as a low nitrogen concentration state.

[0012] Preferably, the sealing assembly includes a slot, a sealing gasket, a No. 1 box, a T-shaped head, a pneumatic head, and a fan. The slot is opened at the top of the furnace base, the sealing gasket is located on the inner wall of the slot, the No. 1 box is located on the inner wall of the furnace base, the outer wall of the No. 1 box is penetrated by a No. 1 tube, the T-shaped head penetrates the inner wall of the No. 1 tube, and one end of the T-shaped head extends to the inner wall of the slot, the inner wall of the No. 1 box is installed with a pneumatic head, one end of the T-shaped head is installed with a No. 1 plate, the outer wall of the No. 1 plate is installed with a No. 1 spring, and one end of the No. 1 spring is connected to the inner wall of the No. 1 box, and the output end of the pneumatic head is connected to the outer wall of the No. 1 plate, the outer wall of the No. 1 box is opened with a No. 1 port, the outer wall of the pneumatic head is penetrated by an air pressure tube, the outer wall of the air pressure tube is installed with a cooling block, and the inner wall of the No. 1 box is installed with a fan.

[0013] Preferably, the fan is located on one side of the cooling block, the inner cover is located on the inner wall of the slot, and the inner cover is connected to the outer wall of the sealing gasket.

[0014] Preferably, an air flow component is installed through the inner wall of the placement pad, and a stabilizing component is installed through the top of the furnace seat.

[0015] Preferably, the air flow assembly includes an air plate, a No. 1 column, a No. 1 frame, a No. 2 motor, a No. 2 spring, and a connecting frame. The No. 1 column is located at the top of the placement pad, and the outer wall of the No. 1 column is provided with a No. 2 opening. The air plate passes through the inner wall of the No. 1 column, and the outer wall of the air plate extends to the outer wall of the No. 2 opening. The connecting frame is connected to one end of the air plate. The No. 2 spring is located on the outer wall of the connecting frame, and the outer wall of the No. 2 spring is connected to the inner wall of the placement pad. The No. 1 frame is located on the inner wall of the placement pad. The No. 2 motor is installed on the outer wall of the No. 1 frame, and the No. 2 motor is installed on the outer wall of the No. 2 motor. The collecting wheel is installed on the outer wall of the collecting wheel. A pull rope is installed, and one end of the pull rope is connected to the outer wall of the connecting frame.

[0016] Preferably, the wind plate is moved by the support of column No. 1, and frame No. 1 is located below the connecting frame.

[0017] Preferably, the stabilizing assembly includes a sealing block, a No. 7 frame, a No. 5 plate, a No. 5 spring, an airbag, a No. 1 clamp, and a No. 1 block. The sealing block is located at the bottom of the outer cover, the No. 7 frame is located on the inner wall of the furnace base, the No. 5 plate is located on the inner wall of the furnace base, the No. 5 spring is located on the outer wall of the No. 7 frame, the airbag is located on the outer wall of the No. 5 plate, a slide is installed on the outer wall of the No. 7 frame, a No. 1 clamp is installed on the outer wall of the slide, and one end of the No. 5 spring is connected to the outer wall of the No. 1 clamp, the outer wall of the airbag is connected to the outer wall of the No. 1 clamp, the inner wall of the outer cover is installed with a No. 1 block, and the outer wall of the No. 1 block is provided with a No. 8 opening.

[0018] Preferably, the No. 1 clamping head is clamped into the No. 8 opening, and the slide is moved by the support of the No. 7 frame.

[0019] Preferably, the method for using the bell annealing furnace comprises the following steps:

[0020] Step S1: When the processing module detects that the nitrogen concentration is in a suitable state, the processing module controls the solenoid valve to close the air inlet pipe and the air outlet assembly, and causes the nitrogen detection head to continuously detect the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is low. When the processing module detects that the nitrogen concentration is low, the processing module controls the solenoid valve to open the air inlet pipe and the air outlet assembly, and causes the nitrogen detection head to continuously detect the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a suitable state, thereby achieving the function of stably supplying the protective atmosphere in the bell-type annealing furnace and improving the production stability of oriented silicon steel;

[0021] Step S2: After the inner cover is inserted into the slot and contacts the sealing gasket, the pneumatic head moves, driving the No. 1 plate to move. The No. 1 plate moves, driving the No. 1 spring to move. The No. 1 spring moves, causing the No. 1 plate to drive the T-shaped head to move. The T-shaped head moves and contacts the outer wall of the inner cover, driving the inner cover to move. The movement of the inner cover seals the placement gasket. At this time, the fan starts to generate wind, which blows towards the cooling block to cool the air pressure tube, thereby improving the operating stability of the pneumatic head. Excess air is discharged through the No. 1 port, thereby achieving the function of improving the tight sealing of the inner cover of the bell-type annealing furnace and improving the annealing stability of grain-oriented silicon steel.

[0022] Step S3: The second motor rotates to drive the collecting wheel to rotate, the collecting wheel rotates to drive the pull rope to move, the pull rope movement drives the connecting frame to move, the connecting frame movement drives the second spring to move, the second spring movement causes the connecting frame to drive the air plate to move, the air plate movement disturbs the air in the inner cover so that the oriented silicon steel is evenly heated, thereby achieving the function of evenly heating the oriented silicon steel and improving the annealing quality of the oriented silicon steel;

[0023] In step S4, the function of plate No. 5 is to provide support for the airbag. The airbag drives the No. 1 clamp to move through the expansion of gas, and the movement of the No. 1 clamp drives the slide to move. The movement of the slide causes the No. 1 clamp to drive the No. 5 spring to move. The movement of the No. 5 spring causes the No. 1 clamp to be clamped into the No. 8 opening. At this time, the furnace base and the outer cover are quickly clamped together to improve the stability of the hood-type annealing furnace. The function of quickly clamping the furnace base and the outer cover to improve the stability of the hood-type annealing furnace is realized.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention is equipped with a processing module. When the processing module detects that the nitrogen concentration is in an appropriate state, the processing module controls the solenoid valve to close the air inlet pipe and the air outlet assembly, and the nitrogen detection head continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is low. When the processing module detects that the nitrogen concentration is low, the processing module controls the solenoid valve to open the air inlet pipe and the air outlet assembly, and the nitrogen detection head continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in an appropriate state. This realizes the function of stably supplying the protective atmosphere in the bell-type annealing furnace and improving the production stability of grain-oriented silicon steel.

[0026] 2. The present invention installs an inner cover that is inserted into a slot and contacts the sealing gasket. The movement of the pneumatic head drives the No. 1 plate to move, which drives the No. 1 spring to move. The movement of the No. 1 spring causes the No. 1 plate to drive the T-shaped head to move. The T-shaped head moves and contacts the outer wall of the inner cover, driving the inner cover to move. The movement of the inner cover seals the placement gasket. At this time, the fan starts to generate wind, which blows towards the cooling block to cool the air pressure tube, thereby improving the operating stability of the pneumatic head. Excess air is discharged through the No. 1 port, thereby achieving the function of improving the tight sealing of the inner cover of the bell-type annealing furnace and improving the annealing stability of grain-oriented silicon steel.

[0027] 3. The present invention utilizes a No. 2 motor to rotate the collecting wheel, which in turn drives the pull rope to move. The movement of the pull rope drives the connecting frame to move. The movement of the connecting frame drives the No. 2 spring to move. The movement of the No. 2 spring causes the connecting frame to move the air plate. The movement of the air plate disturbs the air in the inner cover, uniformly heating the oriented silicon steel. This achieves the function of uniform heating of the oriented silicon steel and improving the annealing quality of the oriented silicon steel.

[0028] 4. The present invention is provided with a No. 5 plate to provide support for the airbag. The airbag drives the No. 1 clamp to move through gas expansion, and the movement of the No. 1 clamp drives the slide to move. The movement of the slide causes the No. 1 clamp to drive the No. 5 spring to move. The movement of the No. 5 spring causes the No. 1 clamp to be clamped into the No. 8 opening. At this time, the furnace base and the outer cover are quickly clamped together, thereby improving the stability of the hood-type annealing furnace. The function of quickly clamping the furnace base and the outer cover to improve the stability of the hood-type annealing furnace is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view structural schematic diagram of the present invention;

[0030] Figure 2 It is a schematic diagram of the front structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the solenoid valve of the present invention;

[0032] Figure 4 Schematic diagram of the gas detection process of the present invention;

[0033] Figure 5 This is a schematic diagram of the T-shaped head structure of the present invention;

[0034] Figure 6 For the present invention Figure 5 Schematic diagram of the A structure;

[0035] Figure 7 This is a schematic diagram of the wind plate structure of the present invention;

[0036] Figure 8 For the present invention Figure 7Schematic diagram of the C structure;

[0037] Figure 9 Schematic diagram of the airbag structure of the present invention;

[0038] Figure 10 For the present invention Figure 9 Schematic diagram of the D structure.

[0039] Figure: 1. Furnace base; 2. Outer cover; 3. Pull head No. 1; 4. Gas inlet box; 5. Flame head; 6. Inner cover; 7. Slot; 8. Sealing gasket; 9. Box No. 1; 10. Pneumatic head; 11. Plate No. 1; 12. Spring No. 1; 13. Cylinder No. 1; 14. T-shaped head; 15. Port No. 1; 16. Air pressure pipe; 17. Cooling block; 19. Fan; 20. Exhaust pipe; 22. Solenoid valve; 23. Nitrogen detection head ; 24. Placement pad; 25. Frame No. 1; 26. Column No. 1; 27. Port No. 2; 28. Wind plate; 30. Spring No. 2; 31. Connecting frame; 32. Motor No. 2; 34. Collecting wheel; 35. Pull rope; 36. Sealing block; 37. Frame No. 7; 38. Plate No. 5; 39. Air bag; 40. Spring No. 5; 42. Slide; 43. Clip No. 1; 44. Block No. 1; 45. Port No. 8; 48. Intake pipe. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will understand this in light of the specific circumstances.

[0043] Example 1: Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, an embodiment provided by the present invention: a high-temperature bell-type annealing furnace for oriented silicon steel, comprising a furnace base 1, an outer cover 2, a gas inlet box 4, a flame head 5, a No. 1 pull head 3, a placement pad 24 and a sealing assembly, the outer cover 2 is installed on the top of the furnace base 1, the inner cover 6 is installed on the top of the furnace base 1, the gas inlet box 4 is installed through the outer wall of the furnace base 1, the flame head 5 is installed on the inner wall of the outer cover 2, and the gas inlet box 4 is connected to one end of the flame head 5 through a pipeline, the No. 1 pull head 3 is installed on the top of the outer cover 2, the placement pad 24 is installed on the top of the furnace base 1, the air inlet pipe 48 is installed through the inner wall of the furnace base 1, the gas outlet assembly is installed through the inner wall of the furnace base 1, and the sealing assembly is installed on the inner wall of the furnace base 1 Parts, after the oriented silicon steel is placed on the surface of the placement pad 24, the inner cover 6 is used to cover the oriented silicon steel. At this time, the outer cover 2 is covered on the outside of the inner cover 6. At this time, the flame head 5 enters the gas through the gas inlet box 4 to heat up and anneal. The gas outlet assembly includes an outlet pipe 20, an electromagnetic valve 22, and a nitrogen detection head 23. The outlet pipe 20 passes through the inner wall of the furnace base 1, and one end of the outlet pipe 20 passes through the outer wall of the placement pad 24. The electromagnetic valve 22 is located on the inner wall of the air inlet pipe 48 and the outlet pipe 20. The nitrogen detection head 23 is located on the inner wall of the outlet pipe 20. A processing module is installed on the inner wall of the furnace base 1. The processing module is electrically connected to the electromagnetic valve 22, and the processing module is electrically connected to the nitrogen detection head 23. The nitrogen detection head 2 3 is used to detect the real-time nitrogen concentration value of the gas discharged from the outlet pipe 20. The processing module has a built-in suitable nitrogen concentration value of the gas discharged from the outlet pipe 20. The suitable nitrogen concentration value is 93-97%. The real-time nitrogen concentration value of the gas discharged from the outlet pipe 20 is transmitted to the processing module. The processing module compares the real-time nitrogen concentration value of the gas discharged from the outlet pipe 20 with the suitable nitrogen concentration value of the gas discharged from the outlet pipe 20. If the real-time nitrogen concentration value of the gas discharged from the outlet pipe 20 is within the suitable nitrogen concentration value of the gas discharged from the outlet pipe 20, it is set as the nitrogen concentration is suitable. If the real-time nitrogen concentration value of the gas discharged from the outlet pipe 20 is less than the suitable nitrogen concentration value of the gas discharged from the outlet pipe 20, it is set as the nitrogen concentration is suitable. The appropriate nitrogen concentration value is set as a low nitrogen concentration state. When the processing module detects that the nitrogen concentration is in a suitable state, the processing module controls the solenoid valve 22 to close the air inlet pipe 48 and the air outlet component, and the nitrogen detection head 23 continues to detect the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a low state. When the processing module detects that the nitrogen concentration is in a low state, the processing module controls the solenoid valve 22 to open the air inlet pipe 48 and the air outlet component, and the nitrogen detection head 23 continues to detect the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a suitable state, thereby realizing the function of stably supplying the protective atmosphere in the hood annealing furnace to improve the production stability of oriented silicon steel.

[0044] Example 2: Please refer to Figure 2 、 Figure 5 and Figure 6, an embodiment provided by the present invention: a sealing assembly includes a card slot 7, a sealing gasket 8, a No. 1 box 9, a T-shaped head 14, a pneumatic head 10, and a fan 19. The card slot 7 is opened at the top of the furnace base 1, the sealing gasket 8 is located on the inner wall of the card slot 7, the No. 1 box 9 is located on the inner wall of the furnace base 1, the outer wall of the No. 1 box 9 is penetrated by a No. 1 tube 13, the T-shaped head 14 penetrates the inner wall of the No. 1 tube 13, and one end of the T-shaped head 14 extends to the inner wall of the card slot 7, the inner wall of the No. 1 box 9 is installed with a pneumatic head 10, one end of the T-shaped head 14 is installed with a No. 1 plate 11, the outer wall of the No. 1 plate 11 is installed with a No. 1 spring 12, and one end of the No. 1 spring 12 is connected to the inner wall of the No. 1 box 9, and the output end of the pneumatic head 10 is connected to the outer wall of the No. 1 plate 11, the outer wall of the No. 1 box 9 is provided with a No. 1 port 15, the outer wall of the pneumatic head 10 is penetrated by an air pressure tube 16, the outer A cooling block 17 is installed on the wall, and a fan 19 is installed on the inner wall of the No. 1 box 9. The fan 19 is located on one side of the cooling block 17. The inner cover 6 is located on the inner wall of the slot 7. The inner cover 6 connects the outer wall of the sealing gasket 8. After the inner cover 6 is inserted into the slot 7, it contacts the sealing gasket 8. The pneumatic head 10 moves to drive the No. 1 plate 11 to move. The No. 1 plate 11 moves to drive the No. 1 spring 12 to move. The No. 1 spring 12 moves to cause the No. 1 plate 11 to drive the T-shaped head 14 to move. The T-shaped head 14 moves and contacts the outer wall of the inner cover 6 to drive the inner cover 6 to move. The inner cover 6 moves to seal the placement pad 24. At this time, the fan 19 starts to generate wind force, and the wind force blows to the cooling block 17 to cool the air pressure tube 16, thereby improving the operating stability of the pneumatic head 10. The excess air is discharged through the No. 1 port 15, thereby improving the tight sealing of the inner cover 6 of the hood-type annealing furnace and improving the annealing stability of oriented silicon steel.

[0045] Example 3: Please refer to Figure 2 、 Figure 7 and Figure 8, an embodiment provided by the present invention: the air flow component includes an air plate 28, a No. 1 column 26, a No. 1 frame 25, a No. 2 motor 32, a No. 2 spring 30, and a connecting frame 31, the No. 1 column 26 is located at the top of the placement pad 24, the outer wall of the No. 1 column 26 is provided with a No. 2 opening 27, the air plate 28 passes through the inner wall of the No. 1 column 26, and the outer wall of the air plate 28 extends to the outer wall of the No. 2 opening 27, the connecting frame 31 is connected to one end of the air plate 28, the No. 2 spring 30 is located on the outer wall of the connecting frame 31, and the outer wall of the No. 2 spring 30 is connected to the inner wall of the placement pad 24, the No. 1 frame 25 is located on the inner wall of the placement pad 24, the outer wall of the No. 1 frame 25 is installed with the No. 2 motor 32, and the outer wall of the No. 2 motor 32 A collecting wheel 34 is installed, and a pull rope 35 is installed on the outer wall of the collecting wheel 34, and one end of the pull rope 35 is connected to the outer wall of the connecting frame 31. The wind plate 28 is moved by the support of the No. 1 column 26. The No. 1 frame 25 is located below the connecting frame 31. The No. 2 motor 32 rotates to drive the collecting wheel 34 to rotate, and the collection wheel 34 rotates to drive the pull rope 35 to move. The movement of the pull rope 35 drives the connecting frame 31 to move. The movement of the connecting frame 31 drives the No. 2 spring 30 to move. The movement of the No. 2 spring 30 causes the connecting frame 31 to drive the wind plate 28 to move. The movement of the wind plate 28 disturbs the air in the inner cover 6 to uniformly heat the oriented silicon steel, thereby realizing the function of uniformly heating the oriented silicon steel and improving the annealing quality of the oriented silicon steel.

[0046] Example 4: Please refer to Figure 2 、 Figure 9 and Figure 10 , an embodiment provided by the present invention: a stabilizing assembly includes a sealing block 36, a No. 7 frame 37, a No. 5 plate 38, a No. 5 spring 40, an air bag 39, a No. 1 clamp 43, and a No. 1 block 44, wherein the sealing block 36 is located at the bottom of the outer cover 2, the No. 7 frame 37 is located on the inner wall of the furnace base 1, the No. 5 plate 38 is located on the inner wall of the furnace base 1, the No. 5 spring 40 is located on the outer wall of the No. 7 frame 37, the air bag 39 is located on the outer wall of the No. 5 plate 38, a slide 42 is installed on the outer wall of the No. 7 frame 37, a No. 1 clamp 43 is installed on the outer wall of the slide 42, and one end of the No. 5 spring 40 is connected to the outer wall of the No. 1 clamp 43, the outer wall of the air bag 39 is connected to the outer wall of the No. 1 clamp 43, the inner wall of the outer cover 2 is installed with the No. 1 block 44, the No. 1 block 4 4 is provided with an outer wall of No. 8 opening 45, and the No. 1 clamping head 43 is clamped into the No. 8 opening 45. The slide 42 is moved by the support of the No. 7 frame 37. The outer cover 2 is placed on the surface of the furnace base 1 so that the sealing block 36 contacts. The function of the No. 5 plate 38 is to provide support for the airbag 39. The airbag 39 drives the No. 1 clamping head 43 to move through gas expansion, and the No. 1 clamping head 43 moves to drive the slide 42 to move. The slide 42 moves to make the No. 1 clamping head 43 drive the No. 5 spring 40 to move, and the No. 5 spring 40 moves to make the No. 1 clamping head 43 clamped into the No. 8 opening 45. At this time, the furnace base 1 and the outer cover 2 are quickly clamped, thereby improving the stability of the hood-type annealing furnace. The function of quickly clamping the furnace base 1 and the outer cover 2 to improve the stability of the hood-type annealing furnace is realized.

[0047] The method for using the bell annealing furnace includes the following steps:

[0048] Step S1: When the processing module detects that the nitrogen concentration is in a suitable state, the processing module controls the solenoid valve 22 to close the air inlet pipe 48 and the air outlet assembly, and the nitrogen detection head 23 continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is low. When the processing module detects that the nitrogen concentration is low, the processing module controls the solenoid valve 22 to open the air inlet pipe 48 and the air outlet assembly, and the nitrogen detection head 23 continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a suitable state, thereby realizing the hood annealing furnace. The protective atmosphere is stably released to improve the stability of oriented silicon steel production. After the inner cover 6 is inserted into the card slot 7, it contacts the sealing gasket 8. The pneumatic head 10 moves to drive the No. 1 plate 11 to move. The No. 1 plate 11 moves to drive the No. 1 spring 12 to move. The No. 1 spring 12 moves to make the No. 1 plate 11 drive the T-shaped head 14 to move. The T-shaped head 14 moves and contacts the outer wall of the inner cover 6 to drive the inner cover 6 to move. The inner cover 6 moves to seal the placement pad 24. At this time, the fan 19 starts to generate wind, and the wind blows to the cooling block 17 to cool the air pressure tube 16, thereby improving the pneumatic head 10. Operation stability, excess air is discharged through the No. 1 port 15, achieving the function of improving the tight sealing of the inner cover 6 of the bell-type annealing furnace and improving the annealing stability of the oriented silicon steel, the No. 2 motor 32 rotates to drive the collecting wheel 34 to rotate, the collecting wheel 34 rotates to drive the pull rope 35 to move, the pull rope 35 moves to drive the connecting frame 31 to move, the connecting frame 31 moves to drive the No. 2 spring 30 to move, the No. 2 spring 30 moves to make the connecting frame 31 drive the air plate 28 to move, the air plate 28 moves to disturb the air in the inner cover 6 so that the oriented silicon steel is evenly heated, achieving uniform oriented silicon steel The function of improving the annealing quality of oriented silicon steel by heating is as follows: the function of the No. 5 plate 38 is to provide support for the airbag 39; the airbag 39 drives the No. 1 clamp 43 to move through gas expansion; the movement of the No. 1 clamp 43 drives the No. 5 spring 40 to move; the No. 5 spring 40 moves to make the No. 1 clamp 43 clamped into the No. 8 mouth 45; at this time, the furnace base 1 and the outer cover 2 are quickly clamped, thereby improving the stability of the hood-type annealing furnace; and the function of quickly clamping the furnace base 1 and the outer cover 2 to improve the stability of the hood-type annealing furnace is realized.

[0049] Working principle,.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A high-temperature bell-type annealing furnace for grain-oriented silicon steel, comprising a furnace base (1), an outer cover (2), a gas inlet box (4), a flame head (5), a No. 1 pull head (3), a placement pad (24) and a sealing assembly, characterized in that: An outer cover (2) is installed on the top of the furnace base (1), an inner cover (6) is installed on the top of the furnace base (1), a gas inlet box (4) is installed through the outer wall of the furnace base (1), a flame head (5) is installed on the inner wall of the outer cover (2), and the gas inlet box (4) is connected to one end of the flame head (5) through a pipeline, a No. 1 pull head (3) is installed on the top of the outer cover (2), a placement pad (24) is installed on the top of the furnace base (1), an air inlet pipe (48) is installed through the inner wall of the furnace base (1), an air outlet assembly is installed through the inner wall of the furnace base (1), and a sealing assembly is installed on the inner wall of the furnace base (1); The gas outlet assembly includes a gas outlet pipe (20), a solenoid valve (22), and a nitrogen detection head (23). The gas outlet pipe (20) passes through the inner wall of the furnace seat (1), and one end of the gas outlet pipe (20) passes through the outer wall of the placement pad (24). The solenoid valve (22) is located on the inner wall of the gas inlet pipe (48) and the gas outlet pipe (20). The nitrogen detection head (23) is located on the inner wall of the gas outlet pipe (20). A processing module is installed on the inner wall of the furnace seat (1). The processing module is electrically connected to the solenoid valve (22). The processing module is electrically connected to the nitrogen detection head (23). The nitrogen detection head (23) is used to detect the real-time nitrogen concentration value of the gas discharged from the gas outlet pipe (20). The processing module has a suitable nitrogen concentration value of the gas discharged from the gas outlet pipe (20). The suitable nitrogen concentration value is 93~97%.

2. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 1, characterized in that: The real-time nitrogen concentration value of the gas discharged from the outlet pipe (20) is transmitted to the processing module, and the real-time nitrogen concentration value of the gas discharged from the outlet pipe (20) is compared with the appropriate nitrogen concentration value of the gas discharged from the outlet pipe (20) by the processing module. If the real-time nitrogen concentration value of the gas discharged from the outlet pipe (20) is within the appropriate nitrogen concentration value of the gas discharged from the outlet pipe (20), it is set as a suitable nitrogen concentration state; if the real-time nitrogen concentration value of the gas discharged from the outlet pipe (20) is less than the appropriate nitrogen concentration value of the gas discharged from the outlet pipe (20), it is set as a low nitrogen concentration state.

3. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 1, characterized in that: The sealing assembly includes a card slot (7), a sealing gasket (8), a No. 1 box (9), a T-shaped head (14), a pneumatic head (10), and a fan (19). The card slot (7) is opened at the top of the furnace base (1), the sealing gasket (8) is located on the inner wall of the card slot (7), the No. 1 box (9) is located on the inner wall of the furnace base (1), the outer wall of the No. 1 box (9) is penetrated by a No. 1 tube (13), the T-shaped head (14) penetrates the inner wall of the No. 1 tube (13), and one end of the T-shaped head (14) extends to the inner wall of the card slot (7), and the inner wall of the No. 1 box (9) is installed with a pneumatic head. The pneumatic head (10) and the T-shaped head (14) are provided with a plate (11) at one end, a spring (12) is provided on the outer wall of the plate (11), and one end of the spring (12) is connected to the inner wall of the box (9), and the output end of the pneumatic head (10) is connected to the outer wall of the plate (11), the outer wall of the box (9) is provided with a port (15), an air pressure pipe (16) is installed through the outer wall of the pneumatic head (10), a cooling block (17) is installed on the outer wall of the air pressure pipe (16), and a fan (19) is installed on the inner wall of the box (9).

4. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 3, characterized in that: The fan (19) is located on one side of the cooling block (17), the inner cover (6) is located on the inner wall of the slot (7), and the inner cover (6) is connected to the outer wall of the sealing gasket (8).

5. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 1, characterized in that: An air flow component is installed through the inner wall of the placement pad (24), and a stabilizing component is installed through the top of the furnace seat (1).

6. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 5, characterized in that: The air flow assembly includes an air plate (28), a No. 1 column (26), a No. 1 frame (25), a No. 2 motor (32), a No. 2 spring (30), and a connecting frame (31). The No. 1 column (26) is located on the top of the placement pad (24). The No. 2 opening (27) is opened on the outer wall of the No. 1 column (26). The air plate (28) passes through the inner wall of the No. 1 column (26), and the outer wall of the air plate (28) extends to the outer wall of the No. 2 opening (27). The connecting frame (31) is connected to one end of the air plate (28). The second spring (30) is located on the outer wall of the connecting frame (31), and the outer wall of the second spring (30) is connected to the inner wall of the placement pad (24). The first frame (25) is located on the inner wall of the placement pad (24). The outer wall of the first frame (25) is installed with the second motor (32). The outer wall of the second motor (32) is installed with a collecting wheel (34). The outer wall of the collecting wheel (34) is installed with a pull rope (35), and one end of the pull rope (35) is connected to the outer wall of the connecting frame (31).

7. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 6, characterized in that: The wind plate (28) moves by being supported by the No. 1 column (26), and the No. 1 frame (25) is located below the connecting frame (31).

8. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 5, characterized in that: The clamping assembly comprises a sealing block (36), a No. 7 frame (37), a No. 5 plate (38), a No. 5 spring (40), an air bag (39), a No. 1 clamp (43), and a No. 1 block (44), wherein the sealing block (36) is located at the bottom of the outer cover (2), the No. 7 frame (37) is located at the inner wall of the furnace seat (1), the No. 5 plate (38) is located at the inner wall of the furnace seat (1), the No. 5 spring (40) is located at the outer wall of the No. 7 frame (37), the air bag (39 ) is located on the outer wall of the No. 5 plate (38), the outer wall of the No. 7 frame (37) is installed with a slide (42), the outer wall of the slide (42) is installed with a No. 1 clamp (43), and one end of the No. 5 spring (40) is connected to the outer wall of the No. 1 clamp (43), the outer wall of the air bag (39) is connected to the outer wall of the No. 1 clamp (43), the inner wall of the outer cover (2) is installed with a No. 1 block (44), and the outer wall of the No. 1 block (44) is provided with an No. 8 opening (45).

9. The high-temperature bell-type annealing furnace for grain-oriented silicon steel according to claim 8, characterized in that: The No. 1 clamping head (43) is clamped into the No. 8 opening (45), and the slide (42) moves through the support of the No. 7 frame (37).

10. An annealing method for a high-temperature bell-type annealing furnace for grain-oriented silicon steel, applicable to the high-temperature bell-type annealing furnace for grain-oriented silicon steel according to any one of claims 1 to 9, characterized in that: The method for using the bell annealing furnace includes the following steps: Step S1, when the processing module detects that the nitrogen concentration is in a suitable state, the processing module controls the solenoid valve (22) to close the air inlet pipe (48) and the air outlet assembly, and the nitrogen detection head (23) continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is low. When the processing module detects that the nitrogen concentration is low, the processing module controls the solenoid valve (22) to open the air inlet pipe (48) and the air outlet assembly, and the nitrogen detection head (23) continuously detects the real-time nitrogen concentration value until the processing module detects that the nitrogen concentration is in a suitable state; Step S2, the No. 1 plate (11) moves to drive the No. 1 spring (12) to move, the No. 1 spring (12) moves to enable the No. 1 plate (11) to drive the T-shaped head (14) to move, the T-shaped head (14) moves to contact the outer wall of the inner cover (6) to drive the inner cover (6) to move, the inner cover (6) moves to seal the placement pad (24), at this time the fan (19) starts to generate wind, the wind blows to the cooling block (17) to cool the air pressure tube (16), thereby improving the operating stability of the pneumatic head (10), and the excess air is discharged through the No. 1 port (15); Step S3, the second motor (32) rotates to drive the collecting wheel (34) to rotate, the collecting wheel (34) rotates to drive the pull rope (35) to move, the pull rope (35) moves to drive the connecting frame (31) to move, the connecting frame (31) moves to drive the second spring (30), the second spring (30) moves to make the connecting frame (31) drive the wind plate (28) to move, the wind plate (28) moves to disturb the air in the inner cover (6) so that the oriented silicon steel is evenly heated; In step S4, the function of the No. 5 plate (38) is to provide support for the airbag (39). The airbag (39) drives the No. 1 clamp (43) to move through gas expansion. The No. 1 clamp (43) moves and drives the slide (42) to move. The slide (42) moves so that the No. 1 clamp (43) drives the No. 5 spring (40) to move. The No. 5 spring (40) moves so that the No. 1 clamp (43) is clamped into the No. 8 opening (45). At this time, the furnace base (1) and the outer cover (2) are quickly clamped, thereby improving the stability of the hood-type annealing furnace.

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