A heating device for steel processing

Abstract

This invention relates to the field of steel post-processing technology, specifically to a heating device for steel processing, comprising a heating furnace and a heat insulation layer fixedly connected inside the heating furnace. A pulling mechanism is provided on the front side of the heating furnace, and a door panel is slidably installed inside the pulling mechanism. The heating device also includes a processing mechanism for heating the steel being heated, located inside the heat insulation layer. Furthermore, the heating device includes a ventilation mechanism for introducing protective gas into the heating furnace, which is mounted on the furnace. Through the configuration of the processing mechanism, during the heating process of the steel, the protective gas introduced into the furnace is blown out in two directions, allowing the heat flow inside the furnace to circulate, resulting in a more uniform temperature inside the furnace, improved thermal efficiency, reduced energy consumption, and more consistent annealing effects for a batch of steel products.

Description

Technical Field

[0001] This invention relates to the field of steel post-processing technology, specifically to a heating device for steel processing. Background Technology

[0002] Annealing is a metal heat treatment process that involves heating a metal material to a suitable temperature, holding it for a certain time, and then cooling it at an appropriate rate. The purpose of this process is to improve the microstructure and properties of the metal material. When annealing small-volume steel, a box annealing furnace is usually used to heat the steel.

[0003] When using a box-type annealing furnace to perform batch annealing of steel products, multiple steel products are usually placed inside the box of the annealing furnace. The steel products are then heated to the required temperature by the heating elements on the annealing furnace. Protective gas is introduced before and during annealing to prevent oxidation of the steel product surface.

[0004] However, because the furnace chamber of a box-type annealing furnace is usually rectangular, the heating elements are typically located in the center of the furnace chamber during the heating process. This results in low heat flow within the furnace chamber, with less heat supply to the corners than to the center, leading to uneven temperature distribution throughout the furnace and affecting the annealing effect on the steel products. After one batch of steel products has been heated, the furnace chamber needs to be opened to remove the annealed products before proceeding to the next batch. During this process, the temperature inside the furnace gradually decreases, which not only wastes time and reduces production efficiency but also increases energy consumption, leading to higher production costs. Summary of the Invention

[0005] Therefore, the present invention provides a heating device for steel processing, which solves the above-mentioned technical problems.

[0006] The present invention provides a heating device for steel processing, including a heating furnace and a heat insulation layer fixedly connected inside the heating furnace. A pulling mechanism is provided on the front side of the heating furnace, and a door panel is slidably arranged inside the pulling mechanism. The heating device also includes a processing mechanism for carrying steel for heating. The processing mechanism is slidably arranged inside the heating furnace in the front-back direction. A ventilation mechanism is provided on the heating furnace.

[0007] The processing mechanism includes a heat insulation support plate slidably connected inside the heating furnace. A connector is provided on the upper surface of the heat insulation support plate. A grooved heat insulation plate is fixedly connected to the upper surface of the heat insulation support plate and between the opposite surfaces of the two connectors. An adjustment component for uniformly heating the temperature inside the furnace using protective gas is provided on the rear surface of the front vertical section of the grooved heat insulation plate. A venting component for pre-venting gas into the furnace is provided on the rear side of the connector. A groove for connecting to an external pushing device is provided on the front surface of the heat insulation support plate.

[0008] According to an embodiment of the invention, the ventilation mechanism includes an electric telescopic rod fixedly connected to a pulling mechanism, a linkage plate fixedly connected to the bottom ends of the two electric telescopic rods, a dispersing strip fixedly connected to the upper surface of the linkage plate, a plurality of evenly distributed connecting pipes fixedly and penetrating the upper surface of the dispersing strip, and a connecting flange fixedly connected to the lower surface of the heating furnace.

[0009] According to an embodiment of the invention, the connecting flange is fixedly connected to the lower surface of the heating furnace via a connecting plate. A connecting hose is provided between the front end of the connecting flange and the bottom end of the dispersing strip. The front end of the heating furnace has a slot that matches the top end of the dispersing strip, and the dispersing strip slides into the slot at the front end of the heating furnace.

[0010] According to an embodiment of the invention, the lower surface of the heat insulation support plate is provided with two sets of symmetrical connecting through holes. The bottom end of the connecting through holes is provided with a first bevel to facilitate the entry of the dispersing strip. Each set of connecting through holes has multiple holes, which are evenly distributed in the left-right direction. Each set of connecting through holes corresponds to multiple connecting pipes.

[0011] According to an embodiment of the invention, the connector includes two symmetrically positioned fixed shells fixedly connected to the upper surface of the support plate. The positions of the two fixed shells correspond one-to-one with the positions of two sets of connecting through holes on the heat insulation support plate. The fixed shells are hollow. Multiple auxiliary tubes evenly distributed in the left-right direction are fixedly connected to the inner wall of the bottom end of the fixed shells. A sealing gasket is fixedly connected to the inner circumference of the auxiliary tubes. A second bevel is provided on the lower surface of the sealing gasket. A third bevel that matches the second bevel is provided at the top of the dispersion strip.

[0012] According to an embodiment of the invention, the adjusting component includes a dispersing unit fixedly connected to the rear surface of the vertical section on the front side of the grooved heat insulation plate. The rear surface of the dispersing unit is fixedly connected to two sets of symmetrically arranged air outlet support pipes. Each set of air outlet support pipes consists of multiple pipes, which are evenly distributed in the left-right direction. The left side of the circumferential surface of the upper set of air outlet support pipes is provided with a first air outlet hole evenly distributed in the front-back direction. The right side of the circumferential surface of the lower set of air outlet support pipes is provided with a second air outlet hole evenly distributed in the front-back direction. The front surface of the dispersing unit is fixedly connected to two symmetrically arranged connecting pipes.

[0013] According to an embodiment of the invention, the venting component includes a mounting shell fixedly connected to the rear surface of the fixed shell on the rear side. The rear surface of the mounting shell has a plurality of third vent holes evenly distributed thereon. A vent pipe is fixedly connected inside the third vent hole, and the front end of the vent pipe extends through the interior of its corresponding connector.

[0014] According to an embodiment of the invention, the rear end of the adjusting member is closed, and the rear end of the adjusting member is fixedly connected to the vertical section on the rear side of the grooved heat insulation plate.

[0015] According to an embodiment of the invention, the size of the connector installed on the heat insulation support plate is adapted to the size of the opening on the front side of the heating furnace. After the heat insulation support plate is fully inserted into the interior of the heating furnace, the front surface of the connector on the front side is on the same plane as the front surface of the heating furnace.

[0016] According to an embodiment of the invention, the pulling mechanism includes two symmetrical sliding rails fixedly connected to the left and right sides of the heating furnace. A support plate is fixedly connected to the top of the two sliding rails. Multiple support frames are fixedly connected to the upper surface of the support plate. A rotating shaft is rotatably connected to the multiple support frames. Two symmetrical winding reels are fixedly connected to the circumference of the rotating shaft. A pull rope is wound on the winding reel. The end of the pull rope away from the winding reel passes through to the bottom of the support plate and is fixedly connected to the upper surface of the door panel. The door panel is slidably connected to the two sliding rails. A drive motor is provided on the upper surface of the heating furnace. The output shaft of the drive motor is connected to the rotating shaft via a belt.

[0017] The technical solution of this invention is as follows: 1. By setting up the processing mechanism, when heating steel, the protective gas introduced into the furnace is blown out in two directions, so that the heat flow inside the furnace can flow, so that the temperature inside the furnace can be more uniform, improving thermal efficiency and reducing energy consumption, and making the annealing effect of a batch of steel products more consistent.

[0018] 2. By using the connecting parts, the furnace can be kept closed during the removal of annealed steel products, minimizing heat loss and allowing for the pre-ventilation of auxiliary heating protective gas. This reduces the preheating time of the furnace when annealing the next batch of steel products, thereby improving production efficiency, reducing energy consumption, and controlling production costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the heating device for steel processing provided by the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the pulling mechanism provided by the present invention.

[0022] Figure 3 This is one of the three-dimensional structural schematic diagrams of the processing mechanism provided by the present invention.

[0023] Figure 4 This is the second three-dimensional structural schematic diagram of the processing mechanism provided by the present invention.

[0024] Figure 5 This invention provides Figure 4 Enlarged view of section A.

[0025] Figure 6 This is one of the three-dimensional structural schematic diagrams of the ventilation mechanism provided by the present invention.

[0026] Figure 7 This is the second three-dimensional structural schematic diagram of the ventilation mechanism provided by the present invention.

[0027] Figure 8 This is a three-dimensional structural schematic diagram of the adjusting component provided by the present invention.

[0028] Reference numerals: 1. Heating furnace; 2. Ventilation mechanism; 3. Processing mechanism; 4. Door panel; 5. Pulling mechanism; 6. Insulation layer; 21. Connecting pipe; 22. Dispersion strip; 23. Electric telescopic rod; 24. Linkage plate; 25. Connecting flange; 31. Connecting piece; 32. Adjusting piece; 33. Grooved insulation plate; 34. Insulation support plate; 35. Ventilation component; 51. Sliding track; 52. Support plate; 53. Support frame; 54. Winding reel; 55. Pull rope; 56. Rotating shaft; 311. Sealing gasket; 312. Fixing shell; 313. Auxiliary pipe; 321. Dispersion unit; 322. Gas outlet support pipe; 323. Connecting pipe; 351. Mounting shell; 352. Ventilation pipe. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] like Figure 1 As shown, a heating device for steel processing includes a heating furnace 1 and a heat insulation layer 6 fixedly connected inside the heating furnace 1. A pulling mechanism 5 is provided on the front side of the heating furnace 1. A door panel 4 is slidably arranged inside the pulling mechanism 5. The heating device also includes a processing mechanism 3 for carrying steel for heating. The processing mechanism 3 is slidably arranged inside the heating furnace 1 in the front-back direction. A ventilation mechanism 2 is provided on the heating furnace 1.

[0031] like Figure 2 As shown, the pulling mechanism 5 includes two symmetrical sliding rails 51 fixedly connected to the left and right sides of the heating furnace 1. The top of the two sliding rails 51 is fixedly connected to a support plate 52. Multiple support frames 53 are fixedly connected to the upper surface of the support plate 52. A rotating shaft 56 is rotatably connected to the multiple support frames 53. Two left and right symmetrical winding reels 54 are fixedly connected to the circumference of the rotating shaft 56. A pull rope 55 is wound on the winding reel 54. The end of the pull rope 55 away from the winding reel 54 passes through to the bottom of the support plate 52 and is fixedly connected to the upper surface of the door panel 4. The door panel 4 is slidably connected to the two sliding rails 51. A drive motor is provided on the upper surface of the heating furnace 1. The output shaft of the drive motor is connected to the rotating shaft 56 through a belt.

[0032] In practical use, when the annealing operation of steel products begins, the drive motor first drives the rotating shaft 56 to rotate, and the rotating shaft 56 drives the winding reel 54 to rotate, winding the pull rope 55 on the winding reel 54. At this time, the winding reel 54 pulls the door panel 4 to slide upward between the two sliding rails 51 through the pull rope 55, opening the front side of the heating furnace 1.

[0033] like Figure 1 and Figure 3 As shown, the processing mechanism 3 includes a heat insulation support plate 34 that is slidably connected to the interior of the heating furnace 1 in the front-to-back direction. A connector 31 is provided on the upper surface of the heat insulation support plate 34. A grooved heat insulation plate 33 is fixedly connected to the upper surface of the heat insulation support plate 34 and located between the opposite surfaces of the two connectors 31. An adjustment member 32 for uniformly heating the interior temperature of the furnace 1 using protective gas is provided on the rear surface of the front vertical section of the grooved heat insulation plate 33. A venting member 35 for pre-venting gas into the furnace is provided on the rear side of the connector 31. A groove for connecting to an external pushing device is provided on the front surface of the heat insulation support plate 34. The rear end of the adjustment member 32 is closed. The rear end of the adjustment member 32 is fixedly connected to the rear vertical section of the grooved heat insulation plate 33. The size of the connector 31 installed on the heat insulation support plate 34 is adapted to the size of the front opening of the heating furnace 1. After the heat insulation support plate 34 is fully inserted into the interior of the heating furnace 1, the front surface of the connector 31 is on the same plane as the front surface of the heating furnace 1.

[0034] In practical use, after the front of the heating furnace 1 is opened, the external pushing device connects to the heat insulation support plate 34 through the pull groove on the heat insulation support plate 34, pulling the heat insulation support plate 34 out from the inside of the heating furnace 1 to the rear connecting piece 31, which is then locked at the front opening of the heating furnace 1. The pulling of the heat insulation support plate 34 is stopped. At this time, the ventilation mechanism 2 delivers heated protective gas into the rear connecting piece 31 to pre-ventilate the furnace chamber and reduce the oxygen content inside the furnace chamber. Then, the workers place the steel products on the section 32. After the steel products are placed, the pushing device pushes the heat insulation support plate 34 completely into the inside of the heating furnace 1, making the front connecting piece 31 flush with the front surface of the heating furnace 1. Then, the drive motor drives the rotating shaft 56 to reverse, causing the door plate 4 to move downward and re-seal the front surface of the heating furnace 1. Then, the annealing treatment of the steel products inside the heating furnace 1 begins.

[0035] like Figure 3 , Figure 4 and Figure 5As shown, the connector 31 includes two symmetrically arranged fixed shells 312 fixedly connected to the upper surface of the support plate 34. The lower surface of the heat insulation support plate 34 has two sets of symmetrically arranged connecting through holes. The positions of the two fixed shells 312 correspond one-to-one with the positions of the two sets of connecting through holes on the heat insulation support plate 34. The fixed shells 312 are hollow. The bottom inner wall of the fixed shells 312 is fixed and connected with multiple auxiliary tubes 313 evenly distributed in the left and right direction. A sealing gasket 311 is fixedly connected to the inner circumference of the auxiliary tubes 313. The lower surface of the sealing gasket 311 is provided with a second bevel.

[0036] like Figure 1 and, Figure 6 Figure 7 As shown, the ventilation mechanism 2 includes two electric telescopic rods 23 fixedly connected to the back of two sliding rails 51. A linkage plate 24 is fixedly connected to the bottom ends of the two electric telescopic rods 23. A dispersing strip 22 is fixedly connected to the upper surface of the linkage plate 24. The top of the dispersing strip 22 has a third bevel that matches the second bevel on the lower surface of the sealing gasket 311. Multiple evenly distributed connecting pipes 21 are fixedly and penetrate the upper surface of the dispersing strip 22. A connecting flange 25 is fixedly connected to the lower surface of the heating furnace 1. The connecting plate is fixedly connected to the lower surface of the heating furnace 1. A connecting hose is provided between the front end of the connecting flange 25 and the bottom end of the dispersing strip 22. The front end of the heating furnace 1 is provided with a slot that matches the top end of the dispersing strip 22. The dispersing strip 22 slides in the slot at the front end of the heating furnace 1. The bottom end of the connecting through hole on the lower surface of the heat insulation support plate 34 is provided with a first bevel to facilitate the entry of the dispersing strip 22. There are multiple connecting through holes in each group, which are evenly distributed in the left and right direction. Each group of connecting through holes corresponds to multiple connecting pipes 21.

[0037] In practical use, when heated protective gas is introduced into the interior of the ventilation mechanism 2 and the connecting piece 31, after the heat insulation support plate 34 moves the fixed shell 312 above the dispersion strip 22, the electric telescopic rod 23 retracts, causing the dispersion strip 22 to move upward. At this time, the connecting pipe 21 passes through the connecting through hole on the heat insulation support plate 34 and is inserted into the interior of the auxiliary pipe 313, and abuts against the sealing gasket 311. The third bevel at the top of the connecting pipe 21 and the second bevel on the sealing gasket 311 make the connection between the connecting pipe 21 and the sealing gasket 311 tight. Then, the external heated protective gas is connected to the connecting flange 25 and delivered to the interior of the dispersion strip 22 through the connecting flange 25. The gas is then dispersed to multiple connecting pipes 21 through the dispersion strip 22 and then enters the interior of the fixed shell 312.

[0038] like Figure 3 and Figure 8As shown, the adjusting component 32 includes a dispersing unit 321 fixedly connected to the rear surface of the vertical section of the front side of the grooved heat insulation plate 33. The rear surface of the dispersing unit 321 is fixedly connected to two sets of symmetrically arranged air outlet support pipes 322. Each set of air outlet support pipes 322 has multiple outlets and is evenly distributed in the left and right directions. The left side of the circumferential surface of the upper set of air outlet support pipes 322 is provided with a first air outlet hole evenly distributed in the front and back directions. The right side of the circumferential surface of the lower set of air outlet support pipes 322 is provided with a second air outlet hole evenly distributed in the front and back directions. The front surface of the dispersing unit 321 is fixedly connected to two symmetrically arranged connecting pipes 323. The front end of the connecting pipes 323 penetrates the vertical section of the front side of the grooved heat insulation plate 33 to the interior of the front fixed shell 312.

[0039] In practical use, when the front fixed shell 312 is connected to the connecting pipe 21, the heated protective gas enters the interior of the dispersion unit 321 through the front fixed shell 312. The dispersion unit 321 distributes the heated protective gas into the interior of the upper and lower rows of gas outlet support pipes 322. The gas enters the interior of the heating furnace 1 through the gas outlet holes in different directions on the upper and lower rows of gas outlet support pipes 322. At the same time, the protective gas blown out in two directions can make the heat flow inside the heating furnace 1 flow, so that the heat distribution in various positions inside the heating furnace 1 is more uniform.

[0040] like Figure 3 and Figure 8 As shown, the venting component 35 includes a mounting shell 351 fixedly connected to the rear surface of the fixed shell 312 on the rear side. Multiple third air outlets are evenly distributed on the rear surface of the mounting shell 351. A venting pipe 352 is fixedly connected inside the third air outlet, and the front end of the venting pipe 352 extends into the interior of its corresponding connector 31.

[0041] In practical use, after the steel products have completed the annealing process, the door panel 4 on the front side of the heating furnace 1 is opened again. The heat insulation support plate 34 is pulled out by the external pushing device and snapped into the front and rear of the heating furnace 1 by the fixed shell 312 on the rear side. At this time, the fixed shell 312 on the rear side is connected to the connecting pipe 21. The heated protective gas enters the interior of the mounting shell 351 through the fixed shell 312 on the rear side, and then enters the interior of the furnace through the vent pipe 352. When the steel products on the adjusting part 32 are taken out after the heat insulation support plate 34 is pulled out, the front end of the heating furnace 1 is sealed through the vent pipe 352 while the heated protective gas is continuously supplied to the interior of the heating furnace 1. While ensuring that the temperature inside the furnace is minimized, the interior of the furnace is pre-ventilated to facilitate the next annealing process of the steel products.

[0042] Working principle: In actual use, the steel product is first placed on the adjusting component 32, and then connected to the heat insulation support plate 34 by the external pushing device through the pull groove on the heat insulation support plate 34. Then the heat insulation support plate 34 is pushed into the interior of the heating furnace 1, and then the steel product is annealed. The heating furnace 1 starts to heat the steel product, and at the same time, protective gas is supplied into the interior of the heating furnace 1 through the ventilation mechanism 2. When the annealing is completed, the external pushing device pulls the heat insulation support plate 34 out of the interior of the heating furnace 1, and the furnace chamber of the heating furnace 1 is sealed and insulated through the rear connecting component 31. Then the operator removes the steel product from the adjusting component 32, and at the same time, the furnace chamber is pre-ventilated through the ventilation mechanism 2 in conjunction with the rear connecting component 31. Then the above steps are repeated for the next annealing operation of the steel product.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heating device for steel processing, characterized in that: It includes a heating furnace and a heat insulation layer fixedly connected inside the heating furnace. A pulling mechanism is provided on the front side of the heating furnace, and a door panel is slidably installed inside the pulling mechanism. A processing mechanism for carrying steel for heating, the processing mechanism is slidably disposed in a heating furnace in a front-to-back direction, and the heating furnace is provided with a ventilation mechanism. The processing mechanism includes a heat insulation support plate slidably connected inside the heating furnace. A connector is provided on the upper surface of the heat insulation support plate. A grooved heat insulation plate is fixedly connected to the upper surface of the heat insulation support plate and between the opposite surfaces of the two connectors. An adjustment component for uniformly heating the temperature inside the furnace using protective gas is provided on the rear surface of the front vertical section of the grooved heat insulation plate. A venting component for pre-venting gas into the furnace is provided on the rear side of the connector. A groove for connecting to an external pushing device is provided on the front surface of the heat insulation support plate. The connector includes two symmetrically arranged fixed shells fixedly connected to the upper surface of the support plate. The fixed shells are hollow. The bottom inner wall of the fixed shell is fixed and connected with a plurality of auxiliary tubes evenly distributed in the left and right direction. A sealing gasket is fixedly connected to the inner circumference of the auxiliary tubes. The ventilation component includes a mounting shell fixedly connected to the rear surface of the fixed shell on the rear side. The rear surface of the mounting shell has a plurality of third air outlets evenly distributed. A ventilation pipe is fixedly connected inside the third air outlet, and the front end of the ventilation pipe extends into the interior of its corresponding connector. The dimensions of the connector mounted on the heat insulation support plate are adapted to the dimensions of the opening on the front side of the heating furnace.

2. The heating device for steel processing according to claim 1, characterized in that: The ventilation mechanism includes an electric telescopic rod fixedly connected to the pulling mechanism. The bottom ends of the two electric telescopic rods are fixedly connected to a linkage plate. A dispersion strip is fixedly connected to the upper surface of the linkage plate. Multiple evenly distributed connecting pipes are fixedly and penetrated through the upper surface of the dispersion strip. A connecting flange is fixedly connected to the lower surface of the heating furnace.

3. The heating device for steel processing according to claim 2, characterized in that: The connecting flange is fixedly connected to the lower surface of the heating furnace via a connecting plate. A connecting hose is provided between the front end of the connecting flange and the bottom end of the dispersing strip. The front end of the heating furnace has a slot that matches the top end of the dispersing strip, and the dispersing strip slides into the slot at the front end of the heating furnace.

4. A heating device for steel processing according to claim 2, characterized in that: The lower surface of the heat insulation support plate is provided with two sets of symmetrical connecting through holes. The bottom end of the connecting through holes is provided with a first bevel to facilitate the entry of the dispersing strip. Each set of connecting through holes has multiple holes, which are evenly distributed in the left and right direction. Each set of connecting through holes corresponds to multiple connecting pipes.

5. A heating device for steel processing according to claim 4, characterized in that: The positions of the two fixed shells correspond one-to-one with the positions of the two sets of connecting through holes on the heat insulation support plate. The lower surface of the sealing gasket is provided with a second bevel, and the top of the dispersion strip is provided with a third bevel that matches the second bevel.

6. The heating device for steel processing according to claim 1, characterized in that: The adjusting component includes a dispersing unit fixedly connected to the rear surface of the vertical section on the front side of the grooved heat insulation plate. The rear surface of the dispersing unit is fixedly connected to two sets of symmetrically arranged air outlet support pipes. Each set of air outlet support pipes consists of multiple pipes that are evenly distributed in the left-right direction. The left side of the circumferential surface of the upper set of air outlet support pipes is provided with a first air outlet hole evenly distributed in the front-back direction. The right side of the circumferential surface of the lower set of air outlet support pipes is provided with a second air outlet hole evenly distributed in the front-back direction. The front surface of the dispersing unit is fixedly connected to two symmetrically arranged connecting pipes.

7. A heating device for steel processing according to claim 1, characterized in that: The rear end of the adjusting component is closed, and the rear end of the adjusting component is fixedly connected to the vertical section on the rear side of the grooved heat insulation plate.

8. A heating device for steel processing according to claim 1, characterized in that: After the heat insulation support plate is fully inserted into the interior of the heating furnace, the front surface of the front connector is on the same plane as the front surface of the heating furnace.

9. A heating device for steel processing according to claim 1, characterized in that: The pulling mechanism includes two symmetrical sliding rails fixedly connected to the left and right sides of the heating furnace. A support plate is fixedly connected to the top of the two sliding rails. Multiple support frames are fixedly connected to the upper surface of the support plate. A rotating shaft is rotatably connected to the multiple support frames. Two symmetrical winding reels are fixedly connected to the circumference of the rotating shaft. A pull rope is wound on the winding reel. The end of the pull rope away from the winding reel passes through to the bottom of the support plate and is fixedly connected to the upper surface of the door panel. The door panel is slidably connected to the two sliding rails. A drive motor is provided on the upper surface of the heating furnace. The output shaft of the drive motor is connected to the rotating shaft via a belt.

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