An oriented silicon steel anti-deviation high-temperature annealing equipment
By employing a limiting frame and airflow circulation structure in the high-temperature annealing equipment for oriented silicon steel, the problems of steel coil misalignment and uneven heating were solved, achieving an efficient and safe annealing process and improving production efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI OUXIDI COATING CO LTD
- Filing Date
- 2026-04-28
- Publication Date
- 2026-06-05
Smart Images
Figure CN122146996A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-temperature annealing technology, specifically to a high-temperature annealing device for preventing misalignment of oriented silicon steel. Background Technology
[0002] The manufacturing process of grain-oriented silicon steel includes smelting, continuous casting, hot rolling, pickling, cold rolling, decarburization annealing, MgO coating, high-temperature annealing, coating with an insulating layer, and hot stretching and leveling.
[0003] For example, Chinese Patent Publication No. CN116004970B discloses a method for improving the temperature uniformity of high-temperature annealing of grain-oriented silicon steel, including the following steps: molten steel is smelted, continuously cast, hot rolled, pickled, cold rolled, decarburized and annealed, coated with MgO, high-temperature annealed, coated with an insulating layer and hot-stretched and leveled to obtain the finished grain-oriented silicon steel product. The high-temperature annealing includes the following steps: Step S1, preparing a high-temperature annealing bell-type furnace, wherein the furnace bottom plate of the high-temperature annealing bell-type furnace is set... It has a hollow sieve structure; Step S2: Lay a porous metal plate coated with MgO flat on the furnace bottom plate; Step S3: Wrap the steel coil to be processed with stepped heat insulation material, and then transfer the steel coil to the high-temperature annealing bell furnace and place it on the porous metal plate; Step S4: First heating stage: Heat the steel to 680-720℃ and hold it at that temperature; Step S5: Second heating stage: Heat the steel to 1150-1200℃ and hold it at that temperature, and then cool it to room temperature.
[0004] The above-mentioned solution uses a limiting structure to restrict the oriented silicon steel coils, effectively preventing displacement during annealing. However, considering the actual production process of high-temperature annealing of oriented silicon steel, this type of limiting structure still has significant defects, greatly affecting the annealing quality. Existing technologies also use similar methods to limit the steel coils, but to increase output, multiple coils are usually vertically hoisted onto the limiting structure, arranged in an array on it, and then pushed into the bell-type annealing furnace. The limiting structure restricts the coils, preventing displacement due to furnace vibration during annealing. However, because the coils need to be hoisted onto the limiting structure first, and are bound with metal strips before hoisting, the strips need to be removed before the coils enter the furnace with the limiting structure. Therefore, the limiting structure can only restrict the bottom of the coil; otherwise, the metal strips binding the coils will be affected. The metal strip will interfere with the limiting structure, making it impossible to untie the metal strip. Due to the above factors, the upper height of the limiting structure needs to be lower than the horizontal height of the metal strip binding the steel coil. In order to ensure the stability of the limiting, the limiting structure usually adopts a full-enclosed structure to compensate for the insufficient limiting caused by the limited limiting height. However, this will cause the part of the steel coil limited by the limiting structure to lag behind the other parts in heating, resulting in uneven heating of the steel coil during annealing. In addition, in the prior art, in order to prevent the inner ring of the steel coil from radially shifting during annealing, a central column needs to be added. However, the central column will hinder the heat transfer, causing the temperature of the inner ring of the steel coil to be lower than the temperature of the outer ring of the steel coil.
[0005] Furthermore, gas protection is an essential process during annealing. Before annealing, an inert protective gas is introduced into the annealing furnace to create a protective atmosphere, effectively preventing oxidation and decarburization of the steel during high-temperature annealing. In existing bell-type annealing furnaces, the heating components indirectly heat the steel coil through the protective gas within the inner bell. However, the poor flowability of the protective gas in the inner bell leads to uneven temperature distribution of the steel coil during heating, negatively impacting its quality. In summary, although existing limiting structures can prevent displacement of the steel coil during annealing, and the protective gas can create a protective atmosphere within the inner bell, both still negatively affect the annealing quality of the steel coil. Summary of the Invention
[0006] To address the aforementioned issues, a high-temperature annealing device for preventing displacement of grain-oriented silicon steel is provided. Multiple limiting frames on a support structure provide limiting support for the grain-oriented silicon steel coils. These frames are evenly arranged along the length of the support, enabling simultaneous annealing of multiple coils and improving production efficiency. Multiple limiting rods within the limiting frames are evenly arranged along the base axis, forming a limiting area for the outer ring of the grain-oriented silicon steel coil. Combined with a central column fixed along the axis at the top of the base, both the outer and inner rings of the coil are simultaneously limited, effectively preventing displacement of the coils during high-temperature annealing due to equipment vibration and other factors. This solves the problem of poor limiting effect in existing limiting structures. The winding grooves on the upper part of the limiting rods provide space for the binding metal strips during hoisting of the grain-oriented silicon steel coils, facilitating effective limiting of the coils during unbinding and preventing them from bursting open. Furthermore, the non-fully enclosed design of the limiting frames reduces heat resistance, and combined with airflow circulation, ensures uniform heating of the coils.
[0007] To address the problems of existing technologies, the present invention provides a high-temperature annealing device for preventing misalignment of oriented silicon steel, comprising an inner cover and an outer cover sleeved around the inner cover, wherein a support platform is horizontally arranged in the inner cover, and a bracket is provided on the support platform that slides and engages with the support platform in the horizontal direction. The inner cover is also provided with a gas protection forming unit on its side wall. The support includes a limiting frame for limiting and supporting the grain-oriented silicon steel coil. Multiple limiting frames are provided and evenly arranged along the length direction of the support. The limiting frame includes: The base is circular and is located at the bottom of the bracket; Multiple limiting rods are provided and evenly arranged along the axis of the base, and all the limiting rods constitute a limiting area for limiting the outer ring of the oriented silicon steel coil; A groove is provided on the upper half of the limiting rod, and the groove is located on the side of the limiting rod close to the axis of the base. The central column is fixedly installed on the upper part of the base along the axis of the base.
[0008] Preferably, a surrounding ring is provided below the winding groove, and the surrounding ring is fixedly connected to all the limiting rods.
[0009] Preferably, the upper part of the limiting rod is provided with a guide rod whose upper end is inclined away from the axis of the base, and all the guide rods constitute a guide area for guiding the oriented silicon steel coil into the limiting area.
[0010] Preferably, the high-temperature annealing equipment further includes: An air intake pipe is disposed inside the inner cover and above the bracket, and an air intake hole is provided on the air intake pipe; An air outlet chamber is located at the bottom of the inner cover. An air outlet hole is vertically opened on the base. The air outlet chamber is connected to the air outlet hole and the air outlet chamber is connected to the air intake pipe. A high-temperature circulating fan is installed between the air outlet chamber and the air intake pipe.
[0011] Preferably, multiple air vents are evenly distributed around the axis of the base to form a ring structure, and the inner diameter of the ring structure is the same as the outer diameter of the oriented silicon steel coil.
[0012] Preferably, the air intake is divided into multiple air intake groups, the number of which is the same as the number of the limiting frames, and each air intake group is located directly above the corresponding limiting frame.
[0013] Preferably, a plurality of first grooves are formed on the inner ring side of the surrounding ring around the axis of the surrounding ring.
[0014] Preferably, a second groove is vertically formed through the peripheral wall of the central column, and multiple second grooves are arranged around the axis of the central column, and the second groove is connected to the air outlet chamber.
[0015] Preferably, the upper part of the base is provided with a lifting ring, which is sleeved around the outer periphery of the central column and slides in a vertical direction with the central column. The base portion below the lifting ring is vertically provided with a lifting hole.
[0016] Preferably, a support rib is fixedly provided horizontally at the lower part of the support platform.
[0017] The advantages of this invention compared to the prior art are: 1. This invention uses multiple limiting frames on a support structure to limit and support the grain-oriented silicon steel coils. These limiting frames are evenly arranged along the length of the support structure, enabling simultaneous annealing of multiple grain-oriented silicon steel coils and improving production efficiency. Multiple limiting rods within the limiting frames are evenly arranged along the base axis, forming a limiting area for the outer ring of the grain-oriented silicon steel coil. Combined with a central column fixed along the axis on the upper part of the base, this simultaneously limits both the outer and inner rings of the grain-oriented silicon steel coil, effectively preventing displacement of the coils during high-temperature annealing due to equipment vibration or other reasons. This invention addresses the problem of poor limiting effect in existing limiting structures. The winding groove in the upper part of the limiting rod provides space for the binding metal strip when hoisting oriented silicon steel coils, facilitating effective limiting of the steel coil during unbinding and preventing it from breaking apart. Before annealing, an inert gas is introduced into the inner shroud through a gas protection forming unit to create a protective atmosphere, and subsequent components allow the inert gas to circulate within the inner shroud. Combined with the non-fully enclosed design of the limiting frame, this reduces heat resistance, ensures uniform heating of the steel coil, and balances production efficiency, operational safety, and annealing quality.
[0018] 2. By setting a surrounding ring below the winding groove and fixing it to all the limiting rods, a surrounding limit is formed on the lower end of the steel coil when it is hoisted and untied. This compensates for the inadequacy of the limiting rods in limiting the axis of the steel coil, further improving the safety of untying. At the same time, it enhances the structural stability of the limiting rods, preventing them from deforming during hoisting and annealing, ensuring the limiting effect, and better preventing the steel coil from deviating. In conjunction with the guide area formed by the guide rods, the steel coil can be guided smoothly into the limiting area, avoiding collision and damage with the limiting rods during hoisting. Without affecting the limiting effect, it provides a guarantee for the smooth progress of the annealing operation.
[0019] 3. By setting up an airflow circulation structure consisting of an air intake pipe, an air outlet chamber, and a high-temperature circulating fan, combined with the optimized design of the air outlet, air intake group, first groove, and second groove, smooth airflow circulation can be achieved within the inner cover. This allows the airflow to precisely act on the inner and outer rings of the steel coil, solving the problems of uneven heating of the steel coil and low temperature of the inner ring, thus improving heat exchange efficiency and annealing quality. At the same time, the supporting ridges enhance the load-bearing capacity and stability of the support platform, ensuring smooth sliding of the bracket and preventing steel coil misalignment. The lifting ring and lifting hole enable convenient bundling of the steel coil after annealing, improving the rationality of the production process and operational safety. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of a high-temperature annealing device for preventing misalignment of oriented silicon steel according to the present invention.
[0021] Figure 2 This is a partial cross-sectional three-dimensional schematic diagram of a high-temperature annealing device for preventing misalignment of oriented silicon steel according to the present invention.
[0022] Figure 3 This invention relates to a high-temperature annealing device for preventing misalignment of grain-oriented silicon steel. Figure 2 A magnified view of a portion of point A in the middle.
[0023] Figure 4 This is a cross-sectional perspective view of a high-temperature annealing device for preventing misalignment of grain-oriented silicon steel according to the present invention. Figure 1 .
[0024] Figure 5 This invention relates to a high-temperature annealing device for preventing misalignment of grain-oriented silicon steel. Figure 4 A magnified view of a portion of point B in the middle.
[0025] Figure 6 This is a cross-sectional perspective view of a high-temperature annealing device for preventing misalignment of grain-oriented silicon steel according to the present invention. Figure 2 .
[0026] Figure 7 This invention relates to a high-temperature annealing device for preventing misalignment of grain-oriented silicon steel. Figure 6 A magnified view of a portion of point C.
[0027] Figure 8 This is a three-dimensional schematic diagram of the high-temperature annealing equipment for preventing misalignment of oriented silicon steel according to the present invention, after removing the inner and outer covers.
[0028] Figure 9 This is a three-dimensional schematic diagram of the limiting frame of a high-temperature annealing equipment for preventing misalignment of oriented silicon steel according to the present invention.
[0029] The following are the labels in the diagram: 1. Inner cover; 11. Support platform; 12. Support ridge; 2. Outer cover; 21. Heating component; 22. Chamber door; 3. Bracket; 31. Limiting frame; 311. Base; 3111. Air outlet; 3112. Lifting hole; 312. Limiting rod; 313. Winding groove; 314. Central column; 3141. Second groove; 315. Enclosing ring; 3151. First groove; 316. Guide rod; 32. Lifting ring; 4. Grain-oriented silicon steel coil; 5. Suction pipe; 51. Suction hole; 6. Air outlet chamber; 7. High-temperature circulating fan. Detailed Implementation
[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0031] Reference Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 and Figure 9 A high-temperature annealing device for preventing misalignment of oriented silicon steel includes an inner cover 1 and an outer cover 2 sleeved around the inner cover 1. A support platform 11 is horizontally arranged in the inner cover 1, and a bracket 3 is provided on the support platform 11 and slides with the support platform 11 in the horizontal direction. A gas protection forming unit is also provided on the side wall of the inner cover 1. The gas protection forming unit is used to inject inert gas into the inner cover 1, thereby forming a protective atmosphere in the inner cover 1 and creating a good environment for annealing. The support 3 includes a limiting frame 31 for limiting and supporting the grain-oriented silicon steel coil 4. Multiple limiting frames 31 are provided and evenly arranged along the length direction of the support 3. The limiting frame 31 includes: The base 311 has a circular structure and is located at the bottom of the bracket 3; Multiple limiting rods 312 are provided and evenly arranged along the axis of the base 311. All the limiting rods 312 constitute a limiting area for limiting the outer ring of the oriented silicon steel coil 4. A groove 313 is provided on the upper half of the limiting rod 312, and the groove 313 is located on the side of the limiting rod 312 near the axis of the base 311. The central column 314 is fixedly disposed on the upper part of the base 311 along the axis of the base 311.
[0032] A heating element 21 is installed on the inner wall of the outer cover 2. The heating element 21 can be electrically heated or gas-fired heated, both of which are existing technologies and will not be described in detail here. A door 22 is provided at the end of the outer cover 2. When the door 22 is open, the interior of the inner cover 1 is connected to the outside. When the door 22 is closed, the interior of the inner cover 1 is disconnected from the outside. It is worth noting that the outer cover 2 encloses the inner cover 1, and a heating cavity is formed between the outer cover 2 and the inner cover 1. The heating element 21, which is installed on the inner wall of the outer cover 2, is located in the heating cavity. The heating element 21 heats the heating cavity, and then the heat is transferred to the inner cover 1, thereby heating the grained silicon steel coil 4 inside the inner cover 1.
[0033] When performing high-temperature annealing on the grain-oriented silicon steel coil 4, the coil 4 is first hoisted onto the limiting frame 31 of the support 3. At this time, the support 3 is located outside the high-temperature annealing equipment. During hoisting, the grain-oriented silicon steel coil 4 enters the limiting area formed by the limiting rod 312, the central column 314 slides into the inner ring of the coil 4, and the limiting rod 312 limits the outer ring of the coil 4. The coil 4 is supported and limited by the limiting frame 31. When the coil 4 is hoisted into the limiting area, the metal strip binding the coil 4 is located at the winding groove 313. At this time, the binding of the metal strip can be released at the winding groove 313 to prevent the coil 4 from breaking open. After placing the grain-oriented silicon steel coils 4 one by one on the respective limiting frames 31 of the support 3, guide the support 3 to slide horizontally along the support platform 11, push the support 3 into the inner cover 1, close the chamber door 22, create an annealing atmosphere in the inner cover 1, and start the heating component 21 on the outer cover 2 to heat the grain-oriented silicon steel coils 4. During the heating process, airflow circulation is used to ensure uniform heating. After the high-temperature annealing is completed, pull the support 3 out of the inner cover 1, bundle the annealed grain-oriented silicon steel coils 4, and hoist them away to complete the entire high-temperature annealing operation.
[0034] The grain-oriented silicon steel coil 4 is supported and limited by multiple limiting frames 31 on the support 3. The multiple limiting frames 31 are evenly arranged along the length of the support 3, which can realize the synchronous annealing of multiple grain-oriented silicon steel coils 4, which is beneficial to improving production efficiency. The multiple limiting rods 312 in the limiting frame 31 are evenly arranged along the axis of the base 311, forming a limiting area for the outer ring of the grain-oriented silicon steel coil 4. Together with the central column 314 fixedly set along the axis on the upper part of the base 311, the outer ring and inner ring of the grain-oriented silicon steel coil 4 can be limited at the same time, which can effectively prevent the grain-oriented silicon steel coil 4 from deviating due to equipment vibration and other reasons during high-temperature annealing, and solve the problem of poor limiting effect of the existing limiting structure. The upper part of the limiting rod 312 is opened The winding groove 313 provides space for the binding metal strip when hoisting the grain-oriented silicon steel coil 4, facilitating effective restraint of the grain-oriented silicon steel coil 4 when unbinding the metal strip, preventing the grain-oriented silicon steel coil 4 from breaking open, and improving the safety of the unbinding operation. At the same time, the structural design of the restraint frame 31 does not require a full-enclosed restraint, reducing the obstruction of the restraint structure to the heating of the grain-oriented silicon steel coil 4. Combined with airflow circulation, it can ensure uniform heating of the grain-oriented silicon steel coil 4, solving the problems of delayed heating and uneven temperature between the inner and outer rings caused by the existing restraint structure. While preventing the grain-oriented silicon steel coil 4 from deviating, it effectively improves the high-temperature annealing quality of the grain-oriented silicon steel coil 4, taking into account production efficiency, operational safety and annealing quality.
[0035] Reference Figure 5 and Figure 9 A surrounding ring 315 is provided below the winding groove 313, and the surrounding ring 315 is fixedly connected to all the limiting rods 312.
[0036] When hoisting the grain-oriented silicon steel coil 4 and untying the metal strip, the enclosing ring 315 is fixedly connected to all the limiting rods 312, forming a circumferential limit on the lower end of the grain-oriented silicon steel coil 4. When the lower end of the grain-oriented silicon steel coil 4 moves below the winding groove 313, the enclosing ring 315 surrounds the lower end of the grain-oriented silicon steel coil 4. At this time, the metal strip at the winding groove 313 is untied. The enclosing ring 315 can effectively compensate for the inability of the limiting rods 312 to completely limit the axis of the grain-oriented silicon steel coil 4, preventing the grain-oriented silicon steel coil 4 from breaking open due to the loss of the metal strip binding. This design further enhances the safety of the unbinding operation. Simultaneously, the fixed connection between the surrounding ring 315 and the limiting rod 312 strengthens the structural stability of the limiting rod 312, preventing deformation during the hoisting and annealing of the grain-oriented silicon steel coil 4. This ensures the limiting effect of the limiting rod 312 on the outer ring of the grain-oriented silicon steel coil 4, thus better preventing displacement of the grain-oriented silicon steel coil 4 during annealing. It solves the technical problems of easy breakage and insufficient limiting stability of the existing limiting structure during unbinding, balancing both unbinding safety and limiting reliability.
[0037] Reference Figure 9 The upper part of the limiting rod 312 is provided with a guide rod 316 whose upper end is inclined away from the axis of the base 311. All the guide rods 316 constitute a guide area for guiding the oriented silicon steel coil 4 into the limiting area.
[0038] When the grain-oriented silicon steel coil 4 is hoisted into the limiting area of the limiting frame 31, all the guide rods 316 constitute a guiding area. The upper end of the guide rod 316 is inclined away from the axis of the base 311, forming a guide structure that gradually contracts from top to bottom. This guides the grain-oriented silicon steel coil 4 during the hoisting process, allowing it to enter the limiting area formed by the limiting rods 312 smoothly and accurately. This avoids collisions between the grain-oriented silicon steel coil 4 and the upper end of the limiting rods 312 when it directly enters the limiting area, thus preventing damage to the surface of the grain-oriented silicon steel coil 4. This solves the technical problems of existing limiting structures lacking guidance function and the easy collision damage to the grain-oriented silicon steel coil 4 during hoisting. At the same time, the setting of the guide rods 316 does not affect the limiting effect of the limiting rods 312 on the grain-oriented silicon steel coil 4. While ensuring that the grain-oriented silicon steel coil 4 enters the limiting area smoothly, it also ensures the safety of the hoisting process and provides a guarantee for the smooth progress of subsequent annealing operations.
[0039] Reference Figure 4 , Figure 5 and Figure 8 The high-temperature annealing equipment also includes: An air intake pipe 5 is disposed inside the inner cover 1 and above the bracket 3, and an air intake hole 51 is provided on the air intake pipe 5; An air outlet chamber 6 is located at the bottom of the inner cover 1. An air outlet hole 3111 is vertically opened on the base 311. The air outlet chamber 6 is connected to the air outlet hole 3111 and the air outlet chamber 6 is connected to the air intake pipe 5. A high-temperature circulating fan 7 is disposed between the air outlet chamber 6 and the air intake pipe 5.
[0040] When the grain-oriented silicon steel coil 4 is subjected to high-temperature annealing, the high-temperature circulating fan 7 is started. The high-temperature circulating fan 7 drives the airflow inside the inner cover 1 to circulate. The suction pipe 5 draws in the high-temperature airflow inside the inner cover 1 through the suction hole 51, and then discharges the airflow into the exhaust chamber 6. The exhaust chamber 6 is connected to the exhaust hole 3111 on the base 311. The airflow is discharged through the exhaust hole 3111 and acts on the grain-oriented silicon steel coil 4 on the limiting frame 31, realizing the circulation of airflow inside the inner cover 1. The airflow circulation makes the temperature distribution inside the inner cover 1 more uniform. At the same time, the obstruction effect of the limiting rod 312 and the surrounding ring 315 on the airflow is smaller than that of the traditional limiting structure, ensuring the smoothness of the airflow.
[0041] Reference Figures 1 to 9The air outlet 3111 is evenly provided with multiple outlets around the axis of the base 311 and forms a ring structure. The inner diameter of the ring structure is the same as the outer diameter of the oriented silicon steel coil 4.
[0042] During the airflow circulation process, multiple air outlets 3111 are evenly arranged around the axis of the base 311 to form a ring structure. The inner diameter of this ring structure is the same as the outer diameter of the grain-oriented silicon steel coil 4, which allows the airflow discharged from the air outlets 3111 to act precisely on the outer ring surface of the grain-oriented silicon steel coil 4, forming a uniform flow airflow layer around the grain-oriented silicon steel coil 4. This ensures full contact between the airflow and the outer ring of the grain-oriented silicon steel coil 4, improving heat exchange efficiency. At the same time, the evenly arranged air outlets 3111 ensure that the airflow on each part of the outer ring of the grain-oriented silicon steel coil 4 is uniform, avoiding the problem of heat lag caused by insufficient local airflow. This further solves the technical problem of uneven heating of the grain-oriented silicon steel coil 4, making the temperature distribution of the outer ring of the grain-oriented silicon steel coil 4 consistent and improving the annealing quality. In addition, the setting of this ring structure is compatible with the limiting structure of the limiting rod 312 and the surrounding ring 315, and does not affect the limiting effect on the grain-oriented silicon steel coil 4. Under the premise of ensuring the reliability of the limiting, the heating effect of the grain-oriented silicon steel coil 4 is further optimized.
[0043] Reference Figures 1 to 9 The air intake 51 is divided into multiple air intake groups, and the number of air intake groups is the same as the number of limiting frames 31. Each air intake group is located directly above the corresponding limiting frame 31.
[0044] During the airflow circulation process, the suction port 51 is divided into multiple suction groups, and the number of suction groups is consistent with the number of limiting frames 31. Each suction group corresponds to one limiting frame 31 and is located directly above it. Through the guiding effect of the suction groups, most of the airflow in the inner cover 1 is concentrated near the grain-oriented silicon steel coils 4 around each limiting frame 31, which effectively increases the airflow velocity around the grain-oriented silicon steel coils 4. Under the same power of the high-temperature circulating fan 7, the increase in airflow velocity can accelerate the heat exchange speed, enabling all parts of the grain-oriented silicon steel coils 4 to quickly reach a uniform temperature, further solving the technical problem of uneven heating of the grain-oriented silicon steel coils 4, while reducing the ineffective loss of airflow and improving energy utilization efficiency. In addition, each suction group corresponds to one limiting frame 31, which can ensure that the airflow distribution around each grain-oriented silicon steel coil 4 is uniform, avoiding the situation of uneven local airflow distribution when multiple grain-oriented silicon steel coils 4 are annealed at the same time, ensuring that the annealing quality of all grain-oriented silicon steel coils 4 is consistent, and taking into account both production efficiency and annealing consistency.
[0045] Reference Figure 9 A plurality of first grooves 3151 are provided on the inner ring side of the surrounding ring 315 around the axis of the surrounding ring 315.
[0046] During the airflow circulation process, the airflow discharged from the vent 3111 forms a flowing airflow layer around the grain-oriented silicon steel coil 4. The surrounding ring 315 is located on the flow path of the airflow layer, which can easily obstruct the airflow. Multiple first grooves 3151 are formed around the axis of the inner ring side of the surrounding ring 315, which can effectively reduce the obstruction effect of the surrounding ring 315 on the airflow layer, allowing the airflow to flow smoothly along the outer ring of the grain-oriented silicon steel coil 4, ensuring the integrity and fluidity of the airflow layer. At the same time, the setting of the first grooves 3151 can increase the contact area between the airflow and the outer ring of the grain-oriented silicon steel coil 4, improve the heat exchange rate between the heat carried by the airflow and the outer ring of the grain-oriented silicon steel coil 4, further optimize the heating uniformity of the grain-oriented silicon steel coil 4, and solve the problem of insufficient local heating of the grain-oriented silicon steel coil 4 caused by the obstruction of airflow by the surrounding ring 315. In addition, the setting of the first grooves 3151 does not affect the limiting effect of the surrounding ring 315 on the lower end of the grain-oriented silicon steel coil 4. Under the premise of ensuring the reliability of the limiting, the smoothness of airflow circulation is ensured, further improving the annealing quality.
[0047] Reference Figure 3 and Figure 7 A second groove 3141 is vertically formed on the peripheral wall of the central column 314. Multiple second grooves 3141 are arranged around the axis of the central column 314. The second groove 3141 is connected to the air outlet chamber 6.
[0048] During the airflow circulation process, part of the airflow in the air outlet chamber 6 acts on the outer ring of the grain-oriented silicon steel coil 4 through the air outlet holes 3111 on the base 311, and the other part flows through the second groove 3141 connected to the air outlet chamber 6. Multiple second grooves 3141 are evenly arranged around the axis of the central column 314 and vertically penetrate the peripheral wall of the central column 314, allowing the airflow to flow through the second grooves 3141 to the inner ring surface of the grain-oriented silicon steel coil 4, thus fully heating the inner ring of the grain-oriented silicon steel coil 4; effectively solving the problem of the current limitation of the central column 314 hindering heat transfer. The problem of the inner ring temperature of the grain-oriented silicon steel coil 4 being lower than that of the outer ring is addressed by allowing airflow to act on both the inner and outer rings of the grain-oriented silicon steel coil 4 simultaneously, achieving synchronous heating of the inner and outer rings of the grain-oriented silicon steel coil 4. This ensures uniform heating of the entire grain-oriented silicon steel coil 4 and improves the annealing quality. At the same time, the setting of the second groove 3141 does not affect the limiting effect of the central column 314 on the inner ring of the grain-oriented silicon steel coil 4. Under the premise of ensuring that the grain-oriented silicon steel coil 4 does not undergo radial movement, the heating effect of the inner ring of the grain-oriented silicon steel coil 4 is optimized, further balancing the reliability of the limiting effect and the annealing quality.
[0049] Reference Figure 8 and Figure 9The upper part of the base 311 is provided with a lifting ring 32. The lifting ring 32 is sleeved around the center column 314 and slides in a vertical direction with the center column 314. The part of the base 311 below the lifting ring 32 is provided with a vertically penetrating lifting hole 3112.
[0050] After the grain-oriented silicon steel coil 4 has undergone high-temperature annealing, it needs to be re-bundled. At this time, a lifting component of a special unloading device passes through the lifting hole 3112 on the base 311. The lifting component contacts the lifting ring 32 and drives the lifting ring 32 to slide vertically along the central column 314. The lifting ring 32 is fitted around the central column 314 and slides in cooperation with it, smoothly lifting the grain-oriented silicon steel coil 4 upwards. During lifting, a staged lifting method is used. After each designated height, workers can bind metal strips around the grain-oriented silicon steel coil 4 until the lifting ring 32 reaches its highest position. After completing the binding operation of the grain-oriented silicon steel coil 4, the hoisting device will then lift it away.
[0051] The lifting ring 32 drives the oriented silicon steel coil 4 to rise and fall synchronously, which facilitates the workers to perform bundling operations at different heights of the upright oriented silicon steel coil 4, improving bundling efficiency and safety. At the same time, the setting of the lifting ring 32 and the lifting hole 3112 does not affect the limiting and heating effect of the oriented silicon steel coil 4 during the annealing process, ensuring a smooth connection between the annealing operation and the unloading and bundling operation, and further improving the rationality of the overall production process.
[0052] Reference Figure 8 The lower part of the support platform 11 is horizontally fixed with a support rib 12.
[0053] A horizontally fixed support ridge 12 is installed at the lower part of the support platform 11, which can effectively enhance the structural strength and load-bearing capacity of the support platform 11. The support platform 11 is used to support the bracket 3 and multiple oriented silicon steel coils 4 on the bracket 3. The oriented silicon steel coils 4 have a certain weight, and when multiple oriented silicon steel coils 4 are placed simultaneously, they will exert a large pressure on the support platform 11. The setting of the support ridge 12 can disperse the pressure on the support platform 11, prevent the support platform 11 from deforming due to long-term heavy pressure, and ensure the flatness and stability of the support platform 11. At the same time, the stability of the support platform 11 can ensure the smoothness of the bracket 3 when sliding horizontally along the support platform 11, and avoid the situation where the bracket 3 slides stuck or the oriented silicon steel coils 4 are misaligned due to the deformation of the support platform 11. This further solves the technical problem of easy misalignment of the oriented silicon steel coils 4 during the annealing process, provides a stable support foundation for the movement of the bracket 3 and the limiting of the oriented silicon steel coils 4, ensures the smooth progress of the entire high-temperature annealing operation, and extends the service life of the equipment.
[0054] Working principle: When performing high-temperature annealing on the grain-oriented silicon steel coil 4, firstly, the grain-oriented silicon steel coil 4 is hoisted one by one onto the support 3 using a hoisting device. At this time, the support 3 is located outside the high-temperature annealing equipment. The support 3 is supported by a special track, which is existing technology and will not be described in detail here. During hoisting, the grain-oriented silicon steel coil 4 is in a vertical state, that is, the axis of the grain-oriented silicon steel coil 4 is perpendicular to the horizontal plane. Under the guidance of the guide rod 316 in the limiting frame 31, the grain-oriented silicon steel coil 4 enters the limiting area formed by the limiting rod 312, thus avoiding the situation where the grain-oriented silicon steel coil 4 collides with the upper end of the limiting rod 312 when it directly enters the limiting area, thereby avoiding damage to the grain-oriented silicon steel coil 4. Because the grain-oriented silicon steel coil 4 has a ring structure, when the grain-oriented silicon steel coil 4 enters the limiting area, the central column 314 slides into the inner ring of the grain-oriented silicon steel coil 4, and the limiting rod 312 is located on the periphery of the grain-oriented silicon steel coil 4 and restricts the grain-oriented silicon steel coil 4. When the grain-oriented silicon steel coil 4 is placed, the grain-oriented silicon steel coil 4 is supported by the lifting ring 32. The limiting frame 31 adopts a non-full-enclosure structure, which ensures that the grain-oriented silicon steel coil 4 is better heated during subsequent heating, and the heating effect of the grain-oriented silicon steel coil 4 will not be reduced due to the limiting of the limiting frame 31.
[0055] It is worth noting that when the oriented silicon steel coil 4 is hoisted to the limiting area, the oriented silicon steel coil 4 is usually tied with metal strips. In order to facilitate disassembly, the metal strips are usually wrapped around the outer ring of the oriented silicon steel coil 4 for tying. In order to ensure the stability of the tying, multiple metal strips are usually set along the axis of the oriented silicon steel coil 4 to tie the oriented silicon steel coil 4. However, when the grain-oriented silicon steel coil 4 is subjected to high-temperature annealing, the metal strip needs to be removed. Therefore, when hoisting the grain-oriented silicon steel coil 4, the lower end of the grain-oriented silicon steel coil 4 first passes through the guide area from top to bottom and enters the limit area. When the lower end of the grain-oriented silicon steel coil 4 moves to the bottom of the winding groove 313 and is surrounded by the surrounding ring 315, the metal strip binding the grain-oriented silicon steel coil 4 is located at the winding groove 313. At this time, since the lower end of the grain-oriented silicon steel coil 4 is surrounded by the surrounding ring 315, the grain-oriented silicon steel coil 4 will not break open when the metal strip is untied. Subsequently, the grain-oriented silicon steel coil 4 continues to descend, and the metal strips binding the outer ring of the grain-oriented silicon steel coil 4 are untied one by one at the winding groove 313, which improves the safety when untying the grain-oriented silicon steel coil 4.
[0056] After placing the grain-oriented silicon steel coils 4 one by one on the support 3, the support 3 is guided to move by a special track, and the door 22 is opened. The upper end of the special track is at the same horizontal level as the upper end of the support platform 11. The support 3 is pushed from the special track into the inner cover 1. The support 3 slides into the support platform 11. After it is fully pushed in, the door 22 is closed, and an atmosphere is created in the inner cover 1 by extracting the air from the inner cover 1 and introducing inert gas. Then, the heating component 21 set on the inner wall of the outer cover 2 is activated to gradually heat the grain-oriented silicon steel coils 4 in the inner cover 1. During heating, high-temperature circulating air... When fan 7 is activated, air in the inner cover 1 is drawn into the suction pipe 5 through the suction hole 51 and discharged into the air outlet chamber 6. The air is then discharged back into the inner cover 1 through the air outlet 3111 and the second groove 3141. The airflow flowing through the second groove 3141 heats the inner ring of the oriented silicon steel coil 4, causing the air in the inner cover 1 to form an airflow from bottom to top. This avoids uneven temperature caused by local airflow stagnation. At the same time, it can limit the inner and outer rings of the oriented silicon steel coil 4 and simultaneously heat the inner and outer rings of the oriented silicon steel coil 4, thus improving heating efficiency. Since the inner diameter of the annular structure formed by the air outlet 3111 is the same as the outer diameter of the grain-oriented silicon steel coil 4, the airflow discharged from the air outlet 3111 can form a flowing airflow layer around the grain-oriented silicon steel coil 4. However, since the surrounding ring 315 is located on the flow path of the airflow layer, in order to reduce the influence of the surrounding ring 315 on the flow state of the airflow layer, multiple first grooves 3151 are opened on the inner ring of the surrounding ring 315. This can reduce the obstruction to the airflow layer and improve the heat exchange rate between the temperature carried by the airflow layer and the outer ring of the grain-oriented silicon steel coil 4. In addition, the air intake 51 is divided into multiple air intake groups, each air intake group corresponds to a limiting frame 31, and each air intake group is set directly above its corresponding limiting frame 31. Through the guidance of the air intake groups, most of the airflow in the inner cover 1 flows only around the grain-oriented silicon steel coil 4, which increases the airflow velocity. This allows the high-temperature circulating fan 7 to achieve a faster airflow velocity in the inner cover 1 at the same power, further improving the uniformity of temperature distribution.
[0057] After the grain-oriented silicon steel coil 4 is heated, it undergoes a stepped, graded, and gradually cooled annealing process. Temperature control for the high-temperature annealing of the grain-oriented silicon steel coil 4 is existing technology and will not be elaborated upon here. After annealing, when the temperature of the grain-oriented silicon steel coil 4 has dropped to a level suitable for removal, the storage door 22 is opened, and the support 3 is pulled from the inner cover 1 onto a dedicated track. As the grain-oriented silicon steel coil 4 cools further, the support 3 is guided by the dedicated track to a dedicated unloading device. This dedicated unloading device consists of a linear actuator and a lifting component. The lifting component is driven by the linear actuator to rise and fall. When the upper end of the lifting component rises, it passes through the lifting hole 3112 and lifts the lifting ring 32. The lifting component uses a staged lifting method. After each stage of lifting to a specified height, a worker binds a metal strap around the grain-oriented silicon steel coil 4 until the lifting ring 32 reaches its highest position. The bound grain-oriented silicon steel coil 4 is then lifted away by a hoisting device.
[0058] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. A high-temperature annealing device for preventing misalignment of oriented silicon steel, comprising an inner cover (1) and an outer cover (2) sleeved around the inner cover (1), wherein a support platform (11) is horizontally arranged in the inner cover (1), and a bracket (3) is provided on the support platform (11) and slides in cooperation with the support platform (11) in the horizontal direction. Its features are, A gas protection forming unit is also provided on the side wall of the inner cover (1). The support (3) includes a limiting frame (31) for limiting and supporting the oriented silicon steel coil (4). Multiple limiting frames (31) are provided and evenly arranged along the length direction of the support (3). The limiting frame (31) includes: The base (311) has a circular structure and is located at the bottom of the bracket (3); Multiple limiting rods (312) are provided and are evenly arranged along the axis of the base (311). All the limiting rods (312) constitute a limiting area for limiting the outer ring of the oriented silicon steel coil (4). A groove (313) is provided on the upper half of the limiting rod (312), and the groove (313) is located on the side of the limiting rod (312) near the axis of the base (311). The central column (314) is fixedly disposed on the upper part of the base (311) along the axis of the base (311).
2. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 1, characterized in that, A surrounding ring (315) is provided below the winding groove (313), and the surrounding ring (315) is fixedly connected to all the limiting rods (312).
3. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 1, characterized in that, The upper part of the limiting rod (312) is provided with a guide rod (316) whose upper end is inclined away from the axis of the base (311). All the guide rods (316) constitute a guide area for guiding the oriented silicon steel coil (4) into the limiting area.
4. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 2, characterized in that, The high-temperature annealing equipment also includes: An air intake pipe (5) is provided inside the inner cover (1) and above the bracket (3), and an air intake hole (51) is provided on the air intake pipe (5). An air outlet chamber (6) is located at the bottom of the inner cover (1). An air outlet hole (3111) is vertically opened on the base (311). The air outlet chamber (6) is connected to the air outlet hole (3111). The air outlet chamber (6) is connected to the air suction pipe (5). A high-temperature circulating fan (7) is disposed between the air outlet chamber (6) and the air intake pipe (5).
5. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 4, characterized in that, The air outlet (3111) is evenly provided with multiple outlets around the axis of the base (311) and forms a ring structure. The inner diameter of the ring structure is the same as the outer diameter of the oriented silicon steel coil (4).
6. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 4, characterized in that, The air intake (51) is divided into multiple air intake groups, the number of which is the same as the number of the limiting frame (31), and each air intake group is located directly above the corresponding limiting frame (31).
7. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 4, characterized in that, A plurality of first grooves (3151) are provided on the inner ring side of the surrounding ring (315) around the axis of the surrounding ring (315).
8. A high-temperature annealing device for preventing misalignment of grain-oriented silicon steel according to any one of claims 4-7, characterized in that, A second groove (3141) is vertically opened through the peripheral wall of the central column (314). Multiple second grooves (3141) are arranged around the axis of the central column (314). The second groove (3141) is connected to the air outlet chamber (6).
9. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 1, characterized in that, The upper part of the base (311) is provided with a lifting ring (32), which is sleeved on the periphery of the central column (314) and slides in cooperation with the central column (314) in the vertical direction. The part of the base (311) below the lifting ring (32) is vertically provided with a lifting hole (3112).
10. The high-temperature annealing equipment for preventing misalignment of grain-oriented silicon steel according to claim 1, characterized in that, The lower part of the support platform (11) is horizontally fixed with a support rib (12).