Vertical bright annealing furnace with full-fiber structure

Abstract

The application discloses a vertical bright annealing furnace with full-fiber structure and relates to the technical field of vertical bright annealing furnaces.The vertical bright annealing furnace comprises a base, an input channel, a furnace body, a polycrystalline alumina fiber layer, a cooling section, an output roller shaft support, stainless steel strips, an air inlet pump, an atmosphere pipe, a circulating assembly, a leveling assembly, a supporting assembly and a pretreatment assembly.The application can continuously change the conduction force of the abutting ring sleeve to the fixed shaft when the electric push rod drives the moving rod to reciprocate, so that the conduction force of the middle part of the abutting ring sleeve to the fixed shaft is prevented from being in the same position for a long time to cause deformation damage to the fixed shaft, and meanwhile, the jet pipe can continuously spray dry high-temperature gas on the surface of the stainless steel strips when the electric push rod works, so that the surface water of the stainless steel strips can be effectively removed, and the surface dust and impurities can be carried away.

Description

Technical Field

[0001] This invention relates to the field of vertical bright annealing furnace technology, specifically a vertical bright annealing furnace with an all-fiber structure. Background Technology

[0002] A vertical bright annealing furnace is an industrial equipment specifically designed for bright annealing heat treatment of metal strips (especially stainless steel, copper alloys, electrical steel, and special alloys). Its core objective is to completely prevent surface oxidation of the material during the annealing process, thereby obtaining a bright and clean surface and eliminating the need for subsequent pickling or polishing processes.

[0003] Traditional vertical bright annealing furnaces are constructed with high-purity alumina refractory bricks lining the metal furnace shell. However, high-purity alumina refractory bricks present risks such as high energy consumption, cracking, long baking time, and falling off. In highly humid environments, the surface of the strip is prone to developing condensation before entering the furnace. When the stainless steel strip with condensation enters the furnace, the water on the strip surface decomposes at high temperatures, producing oxygen and reacting with the strip surface to form an oxide layer. This causes the stainless steel strip to lose its "bright" surface, resulting in dull, iridescent, or even black oxide spots. Furthermore, the high-temperature burning of the stainless steel strip after entering the furnace produces fine dust or particulate volatiles. If these volatiles are not cleaned in time, they can easily adhere to the strip surface, affecting the gloss of the finished stainless steel strip. Additionally, because the stainless steel moves vertically upwards when entering the furnace, the transmission mechanism at the top of the furnace will apply significant tension to the strip. Consequently, the rollers at the bends in the input channel will bear considerable force, which can easily lead to damage to these rollers over time.

[0004] Therefore, this invention proposes a vertical bright annealing furnace with an all-fiber structure. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical bright annealing furnace with an all-fiber structure to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vertical bright annealing furnace with an all-fiber structure, the vertical bright annealing furnace comprising a base, an input channel, a furnace body, a polycrystalline alumina fiber layer, a cooling section, an output roller frame, stainless steel strip, an air pump, an atmosphere pipe, a circulation assembly, a leveling assembly, a support assembly, and a pretreatment assembly; multiple sets of conveying rollers are arranged in the input channel; the furnace body is fixedly connected to the base; the polycrystalline alumina fiber layer is fixedly connected to the inner wall of the furnace body; the cooling section is fixedly connected to the top of the furnace body; the output roller frame is fixedly connected between the cooling section and the base; the stainless steel strip enters the furnace body from between the input rollers at the input channel, passes through the furnace body and the cooling section, and is finally conveyed out from the output roller frame; multiple sets of circulation assemblies are arranged and equidistantly distributed on the outer wall of the furnace body and fixedly connected to the outer wall of the furnace body; the leveling assembly is arranged inside the furnace body and rotatably connected to the polycrystalline alumina fiber layer, and has the same number as the circulation assembly; the stainless steel strip passes through between the leveling assemblies; the support assembly is positioned... At the corner of the stainless steel strip in the input channel, and rotatably connected to the side wall of the input channel, the pretreatment component is set on both sides of the stainless steel strip; the atmosphere pipe is distributed on both sides of the stainless steel strip; during use, pure hydrogen gas is introduced into the furnace through the atmosphere pipe via the input of the gas pump. The stainless steel strip enters the furnace from the input channel of the base for bright heat treatment, and then is cooled in the cooling section before being conveyed outward by the output roller frame and finally rolled into a finished steel coil. In this process, the stainless steel strip first passes through the support component, which continuously changes the position of the main support point to alleviate the support pressure of the uniform fixed shaft. While the support component is working, it drives the pretreatment component to work, blowing the high-temperature dried gas onto the surface of the stainless steel strip to pre-dry the stainless steel strip that has not yet entered the furnace, preventing the stainless steel strip containing moisture from entering the furnace and generating oxides. When the strip enters the furnace, it is rolled and leveled by the leveling component inside the furnace, and the hydrogen gas in the furnace is evenly distributed under the action of the circulation component.

[0007] Preferably, the circulation assembly includes a surrounding plate, a circulating fan, an inlet pipe, an outlet pipe, and an air guide trough. The surrounding plate is fixedly connected to the outer wall of the furnace body, the circulating fan is fixedly connected to the edge of the surrounding plate, and two sets of circulating fans are provided on each set of surrounding plates, symmetrically arranged along the surrounding plate. The inlet pipe is fixedly connected to the top of the circulating fan and extends into the furnace body above the surrounding plate, the outlet pipe is fixedly connected to the bottom of the circulating fan and extends into the furnace body below the surrounding plate, and the air guide trough is fixedly connected to the outlet pipe. Under the action of the circulating fan, the inlet pipe will draw in hydrogen gas at its location and then discharge it from the outlet pipe to the position below the furnace body section where the fan is located, thereby preventing hydrogen gas from continuously accumulating at the top of the furnace body. The uniform distribution of hydrogen gas in the furnace body can be achieved by the simultaneous operation of fans at different sections of the furnace body.

[0008] Preferably, the air guide trough is provided with an air guide plate, which is fixedly connected to the air outlet of the air guide trough and is inclined downward; the air guide plate can guide the hydrogen flow in an inclined downward direction to prevent it from blowing directly onto both sides of the stainless steel strip and causing the stainless steel strip to shake violently.

[0009] Preferably, the leveling assembly includes an inclined chute, pressure rollers, and an overhead air chute; the inclined chute is formed on the polycrystalline alumina fiber layer, the two ends of the pressure roller are slidably connected to the inclined chute, and the overhead air chute is formed in a ring array on the outer peripheral wall of the pressure roller. Each leveling assembly has two sets of pressure rollers, and the two sets of pressure rollers are symmetrically arranged; the pressure rollers on the left and right sides slide downward along the inclined chute and approach each other under the action of gravity. When the stainless steel strip passes between the pressure rollers on the left and right sides, the pressure rollers will approach each other along the inclined chute under the action of their own gravity, clamping the stainless steel strip between the two sets of pressure rollers. During the upward movement of the stainless steel strip, the friction between the pressure rollers and the stainless steel strip will cause the pressure rollers to rotate, and the rotating pressure rollers can play a leveling role on the stainless steel strip.

[0010] Preferably, the pressure roller is located near the bottom of the air guide groove, and the pressure roller is located on the flow path of the airflow in the air guide groove; the top air groove is inclined, and after the hydrogen airflow is circulated out from the air guide groove, it will be received by the top air groove on the pressure roller. The hydrogen airflow blown out from the air guide groove can promote the rotation of the pressure roller, and can also push the left and right pressure rollers closer to each other, thereby increasing the clamping force of the left and right pressure rollers on the stainless steel strip and promoting the leveling effect of the pressure roller on the stainless steel strip.

[0011] Preferably, the support assembly includes a fixed shaft, a first bearing, a support rod, an abutment ring, a support tube sleeve, a sliding groove, a second bearing, a fixed block, a moving rod, a moving groove, a connecting block, and an electric actuator; the fixed shaft is fixedly connected between the side walls of the input channel; the inner side of the first bearing is fixedly connected to the fixed shaft, and the first bearing has two sets distributed at both ends of the fixed shaft; the support rod is fixedly connected to the outer side of the first bearing; the abutment ring is fixedly connected to the support rod; the support tube sleeve is fitted between the abutment ring and the fixed shaft; the sliding groove is formed on the outer peripheral wall of the support tube sleeve; the outer side of the second bearing is fixedly connected to the abutment ring; the inner side of the second bearing is fixedly connected to the fixed block and slidably connected to the sliding groove through the fixed block; the moving rod passes through the fixed shaft and is slidably connected to the fixed shaft; the moving groove is formed on the fixed shaft. The movable rod is fixedly connected to the support sleeve via a connecting block. The electric actuator is fixedly connected to the outer wall of the base, and the output end of the electric actuator is fixedly connected to the movable rod. When the stainless steel strip passes the abutment ring, both sides of the abutment ring will rotate along bearing one, relying on the support rod. The middle of the abutment ring can transmit force to the support sleeve through bearing two, and then to the fixed shaft through the support sleeve. Under the reciprocating movement of the electric actuator, the electric actuator will drive the movable rod to reciprocate. Since the movable rod is fixedly connected to the support sleeve via a fixed block, the reciprocating movement of the movable rod will drive the support sleeve to reciprocate as well. The abutment ring will rotate along the outer periphery of the support sleeve through bearing two. Under the reciprocating movement of the support sleeve, the transmission force of the abutment ring to the fixed shaft can be continuously changed, preventing the transmission force of the middle of the abutment ring to the fixed shaft from being in the same position for a long time, which would cause deformation damage to the fixed shaft.

[0012] Preferably, the pretreatment assembly includes a piston sleeve, a piston rod, a jet pipe, a connecting rod, an adapter box, a threaded pipe, and an air inlet. The piston sleeve is fixedly connected to the outer wall of the base. There are four piston sleeves, arranged in pairs and fixedly connected to both sides of the base. The piston rod is slidably connected to the piston sleeve. The jet pipe is fixedly connected to the piston sleeve, and a one-way valve is provided at the connection between the jet pipe and the piston sleeve, allowing gas to flow only from the piston sleeve to the jet pipe. The connecting rod is fixedly connected between two sets of piston rods, and its middle section is fixedly connected to a moving rod. The adapter box is fixedly connected to the base and communicates with each set of piston sleeves via a connecting pipe. The connecting pipe between the adapter box and the piston sleeve is connected to the piston... The connection of the sleeve is also equipped with a one-way valve, and gas can only pass through the adapter box into the piston sleeve. The threaded tube is fixedly connected to the inside of the polycrystalline alumina fiber layer. The air inlet is located at the top of the threaded tube and extends out of the furnace body. The bottom end of the threaded tube is connected to the adapter box through a connecting tube. While the electric push rod drives the moving rod to move back and forth, when the moving rod is pushed outward, the jet pipe on the right side of the stainless steel strip will spray dry high-temperature gas onto the stainless steel strip. When the moving rod is retracted, the jet pipe on the left side of the stainless steel strip will take over the spraying. Thus, when the electric push rod is working, the jet pipe will continuously spray dry high-temperature gas onto the surface of the stainless steel strip, which can effectively remove the moisture on the surface of the stainless steel strip and carry away its surface dust and impurities.

[0013] Preferably, the air jets are distributed on both sides of the abutment ring, with the left side arranged horizontally and the right side arranged vertically, and the air jets are distributed in pairs on both sides of the stainless steel strip. The distribution of multiple sets of air jets can extend the drying path of the stainless steel strip surface, improve the efficiency of removing moisture from the stainless steel strip surface, and the vertically arranged air jets on the right side of the abutment ring can blow air onto the stainless steel strip as it moves upward, and can more effectively remove dust and other impurities from the surface of the stainless steel strip under the action of gravity.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The furnace body of this invention uses a polycrystalline alumina fiber layer, which differs from the high-purity alumina stacking method used in existing technologies. Polycrystalline alumina fiber material has the characteristics of low density, low thermal conductivity, and high temperature resistance. Most importantly, it has excellent stability in a high-temperature pure hydrogen atmosphere, which can effectively avoid the occurrence of reaction precipitates. At the same time, when the stainless steel strip is conveyed into the furnace body through the input roller in the input channel, it will first pass through the abutment ring and turn at this point, changing from the original horizontal transmission to vertical upward transmission. When the stainless steel strip passes through the abutment ring, the two sides of the abutment ring will rotate along the bearing along the support rod. The reciprocating movement of the support tube driven by the electric push rod can continuously change the transmission force of the abutment ring to the fixed shaft, preventing the transmission force of the abutment ring to the fixed shaft from being in the same position for a long time, which would cause deformation damage to the fixed shaft.

[0016] 2. In this invention, while the electric actuator drives the moving rod to move back and forth, when the moving rod is pushed outward, the jet pipe on the right side of the stainless steel strip will spray dry high-temperature gas onto the stainless steel strip. When the moving rod is retracted, the jet pipe on the left side of the stainless steel strip will take over spraying. Thus, the jet pipes continuously spray dry high-temperature gas onto the surface of the stainless steel strip while the electric actuator is working. This can effectively remove moisture from the surface of the stainless steel strip and carry away dust and impurities. Furthermore, the distribution of multiple sets of jet pipes can extend the drying path of the stainless steel strip surface and improve the efficiency of removing moisture from the surface of the stainless steel strip. The vertically arranged jet pipe on the right side of the abutment ring can blow air onto the stainless steel strip as it moves upward, and under the action of gravity, it can more effectively remove dust and other impurities from the surface of the stainless steel strip.

[0017] 3. In this invention, when the stainless steel strip passes between the pressure rollers on the left and right sides of the furnace body during the conveying process, the pressure rollers, under their own gravity, move closer together along the inclined chute, clamping the stainless steel strip between the two sets of pressure rollers. The rotating pressure rollers then level the stainless steel strip, preventing it from bending and wrinkling at high temperatures. Simultaneously, under the action of the circulating fan outside the furnace body, the inlet pipe draws in hydrogen gas and then discharges it from the outlet pipe to a position below the section of the furnace body where the fan is located. This prevents hydrogen gas from accumulating at the top of the furnace body, achieving uniform hydrogen distribution within the furnace body. After the hydrogen gas flow is circulated out from the air guide groove, it is received by the top air groove on the pressure roller, which pushes the left and right pressure rollers closer to each other, thereby increasing the clamping force of the left and right pressure rollers on the stainless steel strip and promoting the leveling effect of the pressure rollers on the stainless steel strip. Moreover, the hydrogen gas flow after being blown out from the air guide groove has a better diffusion effect after being blocked by the air guide groove, which can further promote the uniformity of hydrogen distribution in the furnace. In addition, some of the hydrogen gas flow after passing through the pressure roller will also tilt downwards and rush towards the surface of the stainless steel strip, which can reduce the vibration of the stainless steel strip and blow away the fine dust or particulate volatiles on its surface. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall appearance of the present invention;

[0019] Figure 2 This is a cross-sectional view of the furnace body and base of the present invention;

[0020] Figure 3 This is a three-dimensional cross-sectional view of the circulation component of the present invention;

[0021] Figure 4 This is a side plan view of the circulation component of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of point A in the image;

[0023] Figure 6 This is a schematic diagram of the preprocessing component structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the base of the present invention;

[0025] Figure 8 This is a cross-sectional view of the base of the present invention;

[0026] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0027] Figure 10 This is a cross-sectional view of the support component of the present invention;

[0028] Figure 11 This is an exploded view of the support component of the present invention.

[0029] In the diagram: 1. Base; 11. Input channel; 2. Furnace body; 21. Polycrystalline alumina fiber layer; 3. Cooling section; 31. Output roller frame; 32. Stainless steel strip; 4. Air inlet pump; 41. Atmosphere pipe; 5. Circulation assembly; 51. Enclosure plate; 52. Circulating fan; 53. Air inlet pipe; 54. Air outlet pipe; 55. Air guide trough; 56. Air guide plate; 6. Leveling assembly; 61. Inclined slide chute; 62. Pressure roller; 63. Top air trough; 7. Support Support assembly; 71. Fixed shaft; 72. Bearing 1; 73. Support rod; 74. Abutment ring sleeve; 75. Support tube sleeve; 76. Sliding groove; 77. Bearing 2; 78. Fixed block; 79. Moving rod; 710. Moving groove; 711. Connecting block; 712. Electric actuator; 8. Pretreatment assembly; 81. Piston sleeve; 82. Jet pipe; 83. Connecting rod; 84. Adapter box; 85. Threaded pipe; 86. Inlet end; 87. Piston column. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 11 This invention provides a vertical bright annealing furnace with an all-fiber structure, the technical solution of which is as follows:

[0032] Reference Figures 1 to 3A vertical bright annealing furnace with an all-fiber structure is disclosed. The furnace includes a base 1, an input channel 11, a furnace body 2, a polycrystalline alumina fiber layer 21, a cooling section 3, an output roller frame 31, stainless steel strip 32, an air pump 4, an atmosphere pipe 41, a circulation assembly 5, a leveling assembly 6, a support assembly 7, and a pretreatment assembly 8. Multiple sets of conveying rollers are installed within the input channel 1. The furnace body 2 is fixedly connected to the base 1. The polycrystalline alumina fiber layer 21 is fixedly connected to the inner wall of the furnace body 2. The cooling section 3 is fixedly connected to the top of the furnace body 2. The output roller frame 31 is fixedly connected between the cooling section 3 and the base 1. The stainless steel strip 32 is fed from the input rollers at the input channel 11. The material enters the furnace body 2 between the shafts, passes through the furnace body 2 and cooling section 3, and is finally conveyed out from the output roller frame 31. Multiple sets of circulation components 5 are provided, equidistantly distributed on the outer wall of the furnace body 2 and fixedly connected to the outer wall of the furnace body 2. Leveling components 6 are located inside the furnace body 2 and rotatably connected to the polycrystalline alumina fiber layer 21, and are the same number as the circulation components 5. Stainless steel strip 32 passes through the leveling components 6. Support components 7 are located at the corners of the stainless steel strip 32 within the input channel 11 and rotatably connected to the side wall of the input channel 11. Pretreatment components 8 are located on both sides of the stainless steel strip 32. Atmosphere pipes 41 are distributed on both sides of the stainless steel strip 32, and can... To reduce the vibration caused by airflow to the stainless steel strip 32, the inner side of the furnace body 2 of this invention uses a polycrystalline alumina fiber layer 21, which differs from the high-purity alumina stacking method used in the prior art. Polycrystalline alumina fiber material has the characteristics of low density, low thermal conductivity, and high temperature resistance. Most importantly, it has excellent stability in a high-temperature pure hydrogen atmosphere, which can effectively avoid the occurrence of reaction precipitates. During use, pure hydrogen gas is input through the air inlet pump 4 and then transported into the furnace body 2 through the atmosphere pipe 41. The stainless steel strip 32 enters the furnace body 2 from the input channel 11 of the base 1 for bright heat treatment, and then is transported outward by the output roller frame 31 after cooling in the cooling section 3. Finally, the stainless steel strip 32 is rolled into a finished steel coil. During this process, the stainless steel strip 32 first passes through the support component 7. The support component 7 will continuously change the position of the main support points to relieve the support pressure of the uniform fixing shaft 71. At the same time as the support component 7 is working, it will drive the pretreatment component 8 to work and blow the high-temperature dried gas onto the surface of the stainless steel strip 32. This will pre-dry the stainless steel strip 32 that has not yet entered the furnace body 2, preventing the stainless steel strip 32 containing moisture from entering the furnace body 2 and generating oxides. After the strip enters the furnace body 2, it will be rolled and leveled by the leveling component 6 inside the furnace body 2. Under the action of the circulation component 5, the hydrogen circulation distribution inside the furnace body 2 can be ensured to be uniform.

[0033] Reference Figures 3 to 5The circulation assembly 5 includes a surrounding plate 51, a circulating fan 52, an inlet pipe 53, an outlet pipe 54, and an air guide duct 55. The surrounding plate 51 is fixedly connected to the outer wall of the furnace body 2. The circulating fan 52 is fixedly connected to the edge of the surrounding plate 51. Two sets of circulating fans 52 are provided on each set of surrounding plates 51 and are symmetrically arranged along the surrounding plate 51. The inlet pipe 53 is fixedly connected to the top of the circulating fan 52 and extends into the furnace body 2 above the surrounding plate 51. The outlet pipe 54 is fixedly connected to the bottom of the circulating fan 52 and extends into the furnace body 2 below the surrounding plate 51. The air duct 55 is fixedly connected to the exhaust pipe 54. Since hydrogen is less dense than air, when hydrogen is introduced into the furnace body 2 through the atmosphere pipe 41 via the intake pump 4, it tends to rise. Under the action of the circulating fan 52, the intake pipe 53 will draw in the hydrogen at its location and then discharge it from the exhaust pipe 54 to the lower part of the furnace body 2 where the fan is located. This prevents the hydrogen from accumulating at the top of the furnace body 2. The uniform distribution of hydrogen in the furnace body 2 can be achieved by the simultaneous operation of the fans at different sections of the furnace body 2.

[0034] Reference Figure 5 An air guide plate 56 is provided on the air guide duct 55. The air guide plate 56 is fixedly connected to the air outlet of the air guide duct 55 and is inclined downward. The air guide plate 56 can guide the hydrogen flow to flow downward at an angle, preventing it from blowing directly onto both sides of the stainless steel strip 32 and causing the stainless steel strip 32 to shake violently, thereby improving the stability of the strip movement.

[0035] Reference Figure 5 The leveling component 6 includes an inclined slide 61, a pressure roller 62, and an overhead air trough 63. The inclined slide 61 is formed on the polycrystalline alumina fiber layer 21. The two ends of the pressure roller 62 are slidably connected to the inclined slide 61. The overhead air trough 63 is formed in a ring array on the outer peripheral wall of the pressure roller 62. Each leveling component 6 is provided with two sets of pressure rollers 62, and the two sets of pressure rollers 62 are symmetrically arranged. The pressure rollers 62 on the left and right sides slide down along the inclined slide 61 and approach each other under the action of gravity. When the stainless steel strip 32 passes between the pressure rollers 62 on the left and right sides, the pressure rollers 62 will approach each other along the inclined slide 61 under the action of their own gravity, thereby clamping the stainless steel strip 32 between the two sets of pressure rollers 62. During the upward movement of the stainless steel strip 32, the friction between the pressure roller 62 and the stainless steel strip 32 will cause the pressure roller 62 to rotate. The rotating pressure roller 62 can play a leveling role on the stainless steel strip 32 and prevent the stainless steel strip 32 from bending and wrinkling at high temperature.

[0036] Reference Figure 5The pressure roller 62 is located near the bottom of the air guide trough 55 and is situated on the airflow path within the air guide trough 55. The top air trough 63 is inclined. After the hydrogen airflow is circulated out of the air guide trough 55, it is received by the top air trough 63 on the pressure roller 62. The hydrogen airflow blown out of the air guide trough 55 can promote the rotation of the pressure roller 62 and push the left and right pressure rollers 62 closer to each other, thereby increasing the clamping force of the left and right pressure rollers 62 on the stainless steel strip 32 and promoting the leveling effect of the pressure roller 62 on the stainless steel strip 32. After the hydrogen airflow is blown out of the air guide trough 55, the diffusion effect is better after being blocked by the air guide trough 55, which can further promote the uniformity of hydrogen distribution in the furnace body 2. Furthermore, some of the hydrogen airflow after passing through the pressure roller 62 will also tilt downwards and rush towards the surface of the stainless steel strip 32, which can reduce the shaking of the stainless steel strip 32 and blow away the fine dust or particulate volatiles on its surface.

[0037] Reference Figure 6 as well as Figures 8 to 11The support assembly 7 includes a fixed shaft 71, a first bearing 72, a support rod 73, an abutment ring 74, a support tube sleeve 75, a sliding groove 76, a second bearing 77, a fixed block 78, a moving rod 79, a moving groove 710, a connecting block 711, and an electric actuator 712. The fixed shaft 71 is fixedly connected between the side walls of the input channel 11. The inner side of the first bearing 72 is fixedly connected to the fixed shaft 71. The first bearing 72 has two sets distributed at both ends of the fixed shaft 71. The support rod 73 is fixedly connected to the outer side of the first bearing 72. The abutment ring 74 is fixedly connected to the support rod 73. The support tube sleeve 75 is sleeved on the abutment ring 74 and the support rod 73. Between the fixed shafts 71, a sliding groove 76 is formed on the outer peripheral wall of the support sleeve 75. The outer side of the bearing 77 is fixedly connected to the abutment ring 74, and the inner side of the bearing 77 is fixedly connected to the fixed block 78. It is also slidably connected to the sliding groove 76 through the fixed block 78. A moving rod 79 is set through the fixed shaft 71 and is slidably connected to the fixed shaft 71. A moving groove 710 is formed on the fixed shaft 71. The moving rod 79 is fixedly connected to the support sleeve 75 through the connecting block 711. An electric actuator 712 is fixedly connected to the outer wall of the base 1, and the output end of the electric actuator 712 is fixedly connected to the moving rod 79. The stainless steel strip 32 passes through the input channel 11. When the input roller conveys the stainless steel strip 32 into the furnace body 2, it first passes through the abutment ring 74 and turns at this point, changing from horizontal to vertical upward transmission. Because the stainless steel strip 32 is subjected to significant tension during transmission, the abutment ring 74 will bear a large abutment force. Over long-term operation, this can easily lead to damage to the fixed shaft 71. In this invention, during operation, when the stainless steel strip 32 passes through the abutment ring 74, both sides of the abutment ring 74 will rotate along the bearing 72 using the support rod 73. The middle of the abutment ring 74 can transmit force to the support tube sleeve 75 through the bearing 77, and then through the support tube... The sleeve 75 transmits the force to the fixed shaft 71, and the electric actuator 712 drives the moving rod 79 to move back and forth under the reciprocating movement of the electric actuator 712. Since the moving rod 79 is fixedly connected to the support sleeve 75 through the fixed block 78, the moving rod 79 drives the support sleeve 75 to move back and forth at the same time. The abutting ring 74 will rotate along the periphery of the support sleeve 75 through the bearing 77. Under the reciprocating movement of the support sleeve 75, the transmission force of the abutting ring 74 to the fixed shaft 71 can be continuously changed, preventing the transmission force of the middle part of the abutting ring 74 to the fixed shaft 71 from being in the same position for a long time, which will cause deformation damage to the fixed shaft 71.

[0038] Reference Figure 6 and Figure 7The pretreatment assembly 8 includes a piston sleeve 81, a piston rod 87, a jet pipe 82, a connecting rod 83, an adapter box 84, a threaded pipe 85, and an air inlet 86. The piston sleeve 81 is fixedly connected to the outer wall of the base 1. There are four piston sleeves 81, arranged in pairs and fixedly connected to both sides of the base 1. The piston rod 87 is slidably connected to the piston sleeve 81. The jet pipe 82 is fixedly connected to the piston sleeve 81, and a one-way valve is provided at the connection between the jet pipe 82 and the piston sleeve 81, allowing gas to flow only from the piston sleeve 81 to the jet pipe 82. The connecting rod 83 is fixedly connected between the two sets of piston rods 87. 3. The middle part is fixedly connected to the moving rod 79. The adapter box 84 is fixedly connected to the base 1. The adapter box 84 is connected to each set of piston sleeves 81 through the connecting pipe. The connection between the connecting pipe between the adapter box 84 and the piston sleeve 81 and the piston sleeve 81 is also equipped with a one-way valve. Gas can only pass from the adapter box 84 into the piston sleeve 81. The threaded pipe 85 is fixedly connected to the inside of the polycrystalline alumina fiber layer 21. The air inlet end 86 is located at the top of the threaded pipe 85 and extends out of the furnace body 2. The bottom end of the threaded pipe 85 is connected to the adapter box 84 through the connecting pipe. When the electric push rod 712 drives the moving rod 79 to move... As the piston reciprocates, the moving rod 79 drives the piston rod 87 to reciprocate along the piston sleeve 81 via the connecting rod 83. When the piston rod 87 moves outward from the piston sleeve 81, the piston sleeve 81 draws in outside air through the threaded pipe 85. Outside air enters the threaded pipe 85 from the inlet end 86 and flows through it, where it is heated by the high temperature inside the furnace body 2, thus raising the gas temperature and keeping it dry. The gas then travels along the threaded rod, the adapter box 84, and the connecting pipe between the adapter box 84 and the piston sleeve 81 before finally entering the piston sleeve 81. Then, when the piston rod 87 moves outward from the piston sleeve 81... When the piston sleeve 81 is pushed inward, gas will be ejected from the piston sleeve 81 to the jet pipe 82. Therefore, when the electric actuator 712 drives the moving rod 79 to move back and forth, when the moving rod 79 is pushed outward, the jet pipe 82 on the right side of the stainless steel strip 32 will spray dry high-temperature gas onto the stainless steel strip 32. When the moving rod 79 is retracted, the jet pipe 82 on the left side of the stainless steel strip 32 will take over the spraying. This ensures that the jet pipe 82 continuously sprays dry high-temperature gas onto the surface of the stainless steel strip 32 when the electric actuator 712 is working, which can effectively remove moisture from the surface of the stainless steel strip 32 and carry away dust and impurities on its surface.

[0039] Reference Figure 7The jet pipes 82 are distributed on both sides of the abutment ring 74, with the left side arranged horizontally and the right side arranged vertically. The jet pipes 82 are distributed in pairs on both sides of the stainless steel strip 32. The distribution of multiple sets of jet pipes 82 can extend the drying path of the stainless steel strip 32 surface and improve the efficiency of removing moisture from the surface of the stainless steel strip 32. In addition, the vertically arranged jet pipes 82 on the right side of the abutment ring 74 can blow air onto the stainless steel strip 32 as it moves upward, and can more effectively remove dust and other impurities from the surface of the stainless steel strip 32 under the action of gravity.

[0040] Working principle: The inner side of the furnace body 2 of this invention adopts a polycrystalline alumina fiber layer 21, which is different from the high-purity alumina stacking method used in the prior art. Polycrystalline alumina fiber material has the characteristics of low density, low thermal conductivity and high temperature resistance. Most importantly, it has excellent stability in a high-temperature pure hydrogen atmosphere, which can effectively avoid the occurrence of reaction precipitates. During the operation, pure hydrogen gas is input by the gas inlet pump 4 and transported into the furnace body 2 through the atmosphere pipe 41. Stainless steel strip 32 enters the furnace body 2 from the input channel 11 of the base 1 for bright heat treatment. After being cooled by the cooling section 3, it is transported out by the output roller frame 31 and finally rolled into a finished steel coil.

[0041] When the stainless steel strip 32 is conveyed into the furnace body 2 through the input roller in the input channel 11, it first passes through the abutment ring 74 and turns at this point, changing from horizontal transmission to vertical upward transmission. When the stainless steel strip 32 passes through the abutment ring 74, the two sides of the abutment ring 74 will rotate along the bearing 72 with the support rod 73. The middle of the abutment ring 74 can transmit the force to the support tube sleeve 75 through the bearing 77, and then to the fixed shaft 71 through the support tube sleeve 75. Under the reciprocating movement of the electric push rod 712, the electric... The push rod 712 will drive the moving rod 79 to move back and forth. Since the moving rod 79 is fixedly connected to the support sleeve 75 through the fixed block 78, the moving rod 79 will drive the support sleeve 75 to move back and forth at the same time. The abutting ring 74 will rotate along the periphery of the support sleeve 75 through the bearing 77. Under the reciprocating movement of the support sleeve 75, the transmission force of the abutting ring 74 to the fixed shaft 71 can be continuously changed, preventing the transmission force of the middle part of the abutting ring 74 to the fixed shaft 71 from being in the same position for a long time, which will cause deformation damage to the fixed shaft 71.

[0042] While the electric actuator 712 drives the moving rod 79 to reciprocate, the moving rod 79 also drives the piston rod 87 to reciprocate along the piston sleeve 81 via the connecting rod 83. When the piston rod 87 moves outward from the piston sleeve 81, the piston sleeve 81 draws in outside air through the threaded pipe 85. The outside air enters the threaded pipe 85 from the inlet end 86. Flowing through the threaded pipe 85, it is heated by the high temperature inside the furnace body 2, causing the gas to heat up and remain dry. The gas then travels along the threaded rod, the adapter box 84, and the connecting pipe between the adapter box 84 and the piston sleeve 81, finally entering the piston sleeve 81. When the piston rod 87 is pushed into the piston sleeve 81, gas will be ejected from the piston sleeve 81 to the jet pipe 82. Therefore, when the electric actuator 712 drives the moving rod 79 to move back and forth, when the moving rod 79 is pushed outward, the jet pipe 82 on the right side of the stainless steel strip 32 will spray dry high-temperature gas onto the stainless steel strip 32. When the moving rod 79 is retracted, the jet pipe 82 on the left side of the stainless steel strip 32 will take over the spraying. Thus, when the electric actuator 712 is working, the jet pipe 82 will continuously spray dry high-temperature gas onto the surface of the stainless steel strip 32, which can effectively remove moisture from the surface of the stainless steel strip 32 and carry away dust and impurities on its surface.

[0043] When the stainless steel strip 32 passes between the pressure rollers 62 on both sides of the furnace body 2 during the conveying process, the pressure rollers 62 will move closer to each other along the inclined slide 61 under their own gravity, thus clamping the stainless steel strip 32 between the two sets of pressure rollers 62. As the stainless steel strip 32 moves upward, the friction between the pressure rollers 62 and the stainless steel strip 32 will cause the pressure rollers 62 to rotate. The rotating pressure rollers 62 can then level the stainless steel strip 32, preventing it from bending and wrinkling at high temperatures. At the same time, under the action of the circulating fan 52 on the outside of the furnace body 2, the inlet pipe 53 will draw in hydrogen gas from its location and then discharge it from the outlet pipe 54 to the lower part of the furnace body 2 section where the fan is located, thus preventing hydrogen gas from accumulating at the top of the furnace body 2. This design ensures uniform hydrogen distribution within the furnace body 2. The hydrogen gas flow, after circulating out from the guide trough 55, is received by the top air trough 63 on the pressure roller 62. The hydrogen gas flow from the guide trough 55 promotes the rotation of the pressure roller 62 and pushes the left and right pressure rollers 62 closer together, increasing the clamping force of the pressure rollers 62 on the stainless steel strip 32 and improving the leveling effect of the pressure rollers 62 on the stainless steel strip 32. Furthermore, the hydrogen gas flow, after being blocked by the guide trough 55, diffuses more effectively, further promoting uniform hydrogen distribution within the furnace body 2. Additionally, some of the hydrogen gas flow after passing through the pressure roller 62 tilts downwards and impacts the surface of the stainless steel strip 32, reducing vibration and blowing away fine dust or particulate volatiles from its surface.

[0044] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vertical bright annealing furnace with full fiber construction, characterized by: The vertical bright annealing furnace comprises a base (1), an input channel (11), a furnace body (2), a polycrystalline alumina fiber layer (21), a cooling section (3), an output roller shaft support (31), a stainless steel strip (32), an air inlet pump (4), an atmosphere pipe (41), a circulating assembly (5), a leveling assembly (6), a supporting assembly (7), and a pretreatment assembly (8); a plurality of groups of conveying rollers are arranged in the input channel (11), the furnace body (2) is fixedly connected to the base (1), the polycrystalline alumina fiber layer (21) is fixedly connected to the inner wall of the furnace body (2), the cooling section (3) is fixedly connected to the top of the furnace body (2), the output roller shaft support (31) is fixedly connected between the cooling section (3) and the base (1), the stainless steel strip (32) enters the furnace body (2) from between the input rollers at the input channel (11) and is conveyed out from the output roller shaft support (31) after passing through the furnace body (2) and the cooling section (3); the circulating assembly (5) is provided in multiple groups and is fixedly connected to the outer wall of the furnace body (2) and is equidistantly distributed on the outer wall of the furnace body (2), the leveling assembly (6) is rotatably connected to the polycrystalline alumina fiber layer (21) in the furnace body (2) and is equal in number to the circulating assembly (5), and the stainless steel strip (32) passes between the leveling assemblies (6), the supporting assembly (7) is located at the corner of the stainless steel strip (32) in the input channel (11) and is rotatably connected to the side wall of the input channel (11), and the pretreatment assembly (8) is arranged on both sides of the stainless steel strip (32); The circulating assembly (5) comprises a surrounding plate (51), a circulating fan (52), an air inlet pipe (53), an air outlet pipe (54), and a wind guide groove (55); the surrounding plate (51) is fixedly connected to the outer wall of the furnace body (2), the circulating fan (52) is fixedly connected to the edge of the surrounding plate (51), each group of the surrounding plate (51) is provided with two groups of the circulating fan (52) and is symmetrically arranged along the surrounding plate (51), the air inlet pipe (53) is fixedly connected to the top of the circulating fan (52) and extends into the furnace body (2) above the surrounding plate (51), the air outlet pipe (54) is fixedly connected to the bottom of the circulating fan (52) and extends into the furnace body (2) below the surrounding plate (51), and the wind guide groove (55) is fixedly connected to the air outlet pipe (54); The leveling assembly (6) comprises an inclined chute (61), a compression roller (62), and a wind guide groove (63); the inclined chute (61) is arranged on the polycrystalline alumina fiber layer (21), the compression roller (62) is slidably connected to the inclined chute (61) at both ends, and the wind guide groove (63) is annularly arranged on the outer peripheral wall of the compression roller (62); each group of the leveling assembly (6) is provided with two groups of the compression roller (62) and the two groups of the compression roller (62) are symmetrically arranged; The compression roller (62) is located near the position below the wind guide groove (55) and is located on the flow path of the airflow in the wind guide groove (55). The pre-processing assembly (8) comprises a piston sleeve (81), a piston column (87), a jet pipe (82), a connecting rod (83), an adapter box (84), a threaded pipe (85), and an air inlet end (86); the piston sleeve (81) is fixedly connected to the outer wall of the base (1), the piston sleeve (81) is provided with four groups, two groups are fixedly connected to the two sides of the base (1), the piston column (87) is slidably connected with the piston sleeve (81), the jet pipe (82) is fixedly connected with the piston sleeve (81), the connecting rod (83) is fixedly connected between the two groups of piston columns (87), and the middle part of the connecting rod (83) is fixedly connected with the moving rod (79), the adapter box (84) is fixedly connected to the base (1), the adapter box (84) is connected with each group of piston sleeves (81) through a connecting pipe, the threaded pipe (85) is fixedly connected to the inner side of the polycrystalline alumina fiber layer (21), the air inlet end (86) is located at the top end of the threaded pipe (85), and the air inlet end (86) extends out of the furnace body (2), and the bottom end of the threaded pipe (85) is connected with the adapter box (84) through a connecting pipe.

2. A vertical bright annealing furnace with full fibre structure according to claim 1, characterized in that: The air guide groove (55) is provided with an air guide plate (56), and the air guide plate (56) is fixedly connected to the air outlet of the air guide groove (55) and is inclined downward.

3. A vertical bright annealing furnace with full fibre structure according to claim 2, characterized in that: The supporting assembly (7) comprises a fixed shaft (71), a bearing one (72), a supporting rod (73), an abutting ring sleeve (74), a supporting pipe sleeve (75), a sliding groove (76), a bearing two (77), a fixed block (78), a moving rod (79), a moving groove (710), a connecting block (711), and an electric push rod (712); the fixed shaft (71) is fixedly connected between the side walls of the input channel (11), the inner side of the bearing one (72) is fixedly connected with the fixed shaft (71), the bearing one (72) is provided with two groups which are distributed at the two ends of the fixed shaft (71), the supporting rod (73) is fixedly connected to the outer side of the bearing one (72), the abutting ring sleeve (74) is fixedly connected with the supporting rod (73), the supporting pipe sleeve (75) is sleeved between the abutting ring sleeve (74) and the fixed shaft (71), the sliding groove (76) is formed on the outer peripheral wall of the supporting pipe sleeve (75), the outer side of the bearing two (77) is fixedly connected with the abutting ring sleeve (74), the inner side of the bearing two (77) is fixedly connected with the fixed block (78), and the fixed block (78) is slidably connected with the sliding groove (76), the moving rod (79) penetrates through the fixed shaft (71) and is slidably connected with the fixed shaft (71), the moving groove (710) is formed on the fixed shaft (71), the moving rod (79) is fixedly connected with the supporting pipe sleeve (75) through the connecting block (711), and the electric push rod (712) is fixedly connected to the outer wall of the base (1), and the output end of the electric push rod (712) is fixedly connected with the moving rod (79).

4. A vertical bright annealing furnace with full fibre structure according to claim 3, characterized in that: The jet pipes (82) are distributed on both sides of the abutting ring sleeve (74), and are horizontally arranged on the left side and vertically arranged on the right side, and the jet pipes (82) are distributed on both sides of the stainless steel strip (32) in two groups respectively.

Images