Heating device for steel processing

Abstract

The invention relates to the technical field of steel post-treatment, in particular to a heating device for steel processing, which comprises a heating furnace and a heat insulation layer fixedly connected in the heating furnace, a pulling mechanism is arranged on the front side of the heating furnace, and a door plate is arranged in the pulling mechanism in an up-down sliding manner. The heating equipment further comprises a processing mechanism used for heating bearing steel and iron, the processing mechanism is arranged on the inner side of the heat insulation layer, the heating equipment further comprises a ventilation mechanism used for inputting protective gas into the heating furnace, and the ventilation mechanism is arranged on the heating furnace. When steel is heated, protective gas introduced into the hearth is blown out in two directions, so that heat flow in the hearth can flow, the temperature in the hearth can be more uniform, the heat efficiency is improved, the energy consumption is reduced, and the annealing effect of a batch of steel products is more consistent.

Description

Technical Field

[0001] The present invention relates to the technical field of steel post-processing, in particular to a heating device for steel processing. Background Art

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

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

[0004] However, since the furnace of a box-type annealing furnace is usually in the shape of a rectangular parallelepiped, the heating elements are usually distributed in the middle of the furnace during the heating process. The heat flow inside the furnace is not high during the entire heating process, and the heat supply in the corners of the furnace is not as sufficient as that in the middle of the furnace, resulting in uneven temperature throughout the furnace, affecting the annealing effect of the steel products. After a batch of steel products is heated, the furnace needs to be opened to take out the annealed steel products, and then anneal the next batch of steel products. During this process, the temperature in the furnace will gradually decrease, which not only wastes time but also reduces production efficiency, and also increases energy use, resulting in increased production costs. Summary of the Invention

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

[0006] The present invention provides a heating device for steel processing, comprising a heating furnace and an insulating layer fixedly connected to the interior of the heating furnace. A pulling mechanism is provided on the front side of the heating furnace, and a door panel is provided inside the pulling mechanism for sliding up and down. The heating device also includes a processing mechanism for carrying steel for heating, and the processing mechanism is slidably provided in the heating furnace along the front-back direction. A ventilation mechanism is provided on the heating furnace.

[0007] The processing mechanism includes a heat-insulating support plate slidably connected to the inside of the heating furnace, a connecting piece is provided on the upper surface of the heat-insulating support plate, a groove-shaped heat-insulating plate is fixedly connected to the upper surface of the heat-insulating support plate and located between the opposite surfaces of the two connecting pieces, the rear surface of the vertical section of the front side of the groove-shaped heat-insulating plate is provided with a regulating piece for uniformly heating the temperature inside the furnace with protective gas, the rear side of the connecting piece on the rear side is provided with a ventilation piece for pre-ventilating the interior of the furnace, and the front surface of the heat-insulating support plate is provided with a pull groove connected to the external pushing equipment.

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

[0009] According to an embodiment of the invention, the connecting flange is fixedly connected to the lower surface of the heating furnace through a connecting plate, a connecting hose is provided between the front end of the connecting flange and the bottom end of the dispersion strip, a card slot adapted to the top end of the dispersion strip is provided at the front end of the heating furnace, and the dispersion strip slides in conjunction with the card slot at the front end of the heating furnace.

[0010] According to an embodiment of the invention, two groups of front-to-back symmetrical connecting through holes are provided on the lower surface of the heat-insulating support plate, and a first groove is provided at the bottom end of the connecting through holes to facilitate the entry of the dispersion strip. The number of the connecting through holes in each group is multiple and evenly distributed along the left-right direction. Any group of the connecting through holes corresponds one-to-one to multiple connecting pipes.

[0011] According to an embodiment of the invention, the connecting part includes two front-to-back symmetrical fixed shells fixedly connected to the upper surface of the support plate, the positions of the two fixed shells correspond one-to-one to the positions of the two groups of connecting through holes on the heat-insulating support plate, the fixed shells are hollow, and the inner wall of the bottom end of the fixed shell is fixed and connected with a plurality of auxiliary tubes evenly distributed in the left and right directions, a sealing gasket is fixedly connected to the inner circumferential surface of the auxiliary tube, a second groove is provided on the lower surface of the sealing gasket, and a third groove is provided on the top of the dispersion strip to match the second groove.

[0012] According to an embodiment of the invention, the adjusting part includes a dispersion unit fixedly connected to the rear surface of the vertical section on the front side of the groove-shaped heat insulation board, and the rear surface of the dispersion unit is fixedly connected to two groups of upper and lower symmetrical air outlet support pipes, and the number of the air outlet support pipes in each group is multiple and evenly distributed along the left and right directions. The left side of the circumferential surface of the upper group of air outlet support pipes is provided with first air outlet holes evenly distributed along the front and back directions, and the right side of the circumferential surface of the lower group of air outlet support pipes is provided with second air outlet holes evenly distributed along the front and back directions. The front surface of the dispersion unit is fixed with and penetrated by two left and right symmetrical connecting pipes.

[0013] According to an embodiment of the invention, the ventilation piece includes a mounting shell fixedly connected to the rear surface of the fixed shell on the rear side, and a plurality of third air outlet holes are evenly distributed on the rear surface of the mounting shell. A ventilation pipe is fixedly connected to the interior of the third air outlet holes, and the front end of the ventilation pipe passes through the interior of its corresponding connecting piece.

[0014] According to an embodiment of the present 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 groove-shaped heat insulation board.

[0015] According to an embodiment of the invention, the size of the connecting piece installed on the insulation support plate is adapted to the size of the opening on the front side of the heating furnace. After the insulation support plate is fully inserted into the interior of the heating furnace, the front surface of the connecting piece on the front side is in 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, the top ends of the two sliding rails are commonly fixedly connected to a supporting cross plate, the upper surface of the supporting cross plate is fixedly connected to a plurality of support frames, the plurality of support frames are commonly rotatably connected to a rotating shaft, two left and right symmetrical winding disks are fixedly connected to the circumferential surface of the rotating shaft, a pull rope is wound around the winding disk, the end of the pull rope away from the winding disk passes through the bottom of the supporting cross plate and is fixedly connected to the upper surface of the door panel, the door panel is connected to the two sliding rails for up and down sliding, a driving motor is provided on the upper surface of the heating furnace, and the output shaft of the driving motor is connected to the rotating shaft through a belt transmission.

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

[0018] 2. Through the setting of the connecting parts, the furnace can always be kept in a closed state during the process of taking out the annealed steel products, so that the heat inside the furnace is lost as little as possible, and the pre-ventilation of the auxiliary heating protection gas is reduced. When the next batch of steel products is annealed, the preheating time of the furnace is reduced, thereby improving production efficiency, reducing energy loss, and controlling production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

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

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

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

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

[0024] Figure 5 The present invention provides Figure 4 Enlarged view of part 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 schematic diagram of the three-dimensional structure of the ventilation mechanism provided by the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the adjusting member provided by the present invention.

[0028] Figure 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 board; 34. Insulation support board; 35. Ventilation piece; 51. Sliding track; 52. Supporting horizontal board; 53. Support frame; 54. Reel; 55. Pull rope; 56. Rotating shaft; 311. Sealing gasket; 312. Fixed shell; 313. Auxiliary pipe; 321. Dispersion unit; 322. Air outlet support pipe; 323. Connecting pipe; 351. Mounting shell; 352. Ventilation pipe. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope 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 to the inside of the heating furnace 1. A pulling mechanism 5 is provided on the front side of the heating furnace 1. A door panel 4 is provided inside the pulling mechanism 5 for sliding up and down. The heating device also includes a processing mechanism 3 for carrying steel for heating. The processing mechanism 3 is slidably provided in the heating furnace 1 along the front and rear directions. 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 ends of the two sliding rails 51 are commonly fixedly connected to a supporting cross plate 52, the upper surface of the supporting cross plate 52 is fixedly connected to a plurality of support frames 53, and the multiple support frames 53 are commonly rotatably connected to a rotating shaft 56, and two left-right symmetrical winding disks 54 are fixedly connected to the circumferential surface of the rotating shaft 56, and a pull rope 55 is wound around the winding disk 54, and the end of the pull rope 55 away from the winding disk 54 passes through the bottom of the supporting cross plate 52 and is fixedly connected to the upper surface of the door panel 4, and the door panel 4 is connected to the two sliding rails 51 for up and down sliding. A driving motor is provided on the upper surface of the heating furnace 1, and the output shaft of the driving motor is connected to the rotating shaft 56 through a belt.

[0032] During specific use, when the annealing operation of the steel product begins, the rotating shaft 56 is first driven by the driving motor to rotate, and the rotating shaft 56 drives the winding disk 54 to rotate to reel in the pull rope 55 on the winding disk 54. At this time, the winding disk 54 pulls the door panel 4 through the pull rope 55 to slide upward between the two sliding rails 51, thereby opening the front side of the heating furnace 1.

[0033] like Figure 1 and Figure 3 As shown, the processing mechanism 3 includes an insulating support plate 34 that is slidably connected to the inside of the heating furnace 1 along the front-to-back direction, and a connecting piece 31 is provided on the upper surface of the insulating support plate 34. A groove-shaped insulating plate 33 is fixedly connected to the upper surface of the insulating support plate 34 and located between the opposite surfaces of the two connecting pieces 31. The rear surface of the vertical section of the front side of the groove-shaped insulating plate 33 is provided with an adjusting piece 32 for uniformly heating the temperature inside the furnace 1 with protective gas, and the rear side of the rear connecting piece 31 is provided with a ventilation piece 35 for pre-ventilating the interior of the furnace. The front surface of the insulating support plate 34 is provided with a pull groove connected to an external pushing device, and the rear end of the adjusting piece 32 is closed. The rear end of the adjusting piece 32 is fixedly connected to the vertical section of the rear side of the groove-shaped insulating plate 33. The size of the connecting piece 31 installed on the insulating support plate 34 is adapted to the size of the front opening of the heating furnace 1. After the insulating support plate 34 is fully entered into the interior of the heating furnace 1, the front surface of the front connecting piece 31 is in the same plane as the front surface of the heating furnace 1.

[0034] During specific use, when the front side of the heating furnace 1 is opened, the external pushing device is connected to the insulation support plate 34 through the groove on the insulation support plate 34, and the insulation support plate 34 is pulled out from the interior of the heating furnace 1 to the rear connecting piece 31 and stuck in the front opening position of the heating furnace 1. The pulling of the insulation support plate 34 is stopped. At this time, the heated protective gas is transported to the interior of the rear connecting piece 31 through the ventilation mechanism 2, and pre-ventilation is performed inside the furnace to reduce the oxygen content inside the furnace. Then the staff places the steel products on the section 32. When the steel products are placed, the insulation support plate 34 is completely pushed into the interior of the heating furnace 1 by the pushing device, so that the front connecting piece 31 is flush with the front surface of the heating furnace 1, and then the driving motor drives the rotating shaft 56 to reverse, so that the door panel 4 moves downward and is re-sealed on the front surface of the heating furnace 1, and then the steel products inside it are annealed through the heating furnace 1.

[0035] like Figure 3 、 Figure 4 and Figure 5As shown, the connecting member 31 includes two front-to-back symmetrical fixed shells 312 fixedly connected to the upper surface of the support plate 34, and two groups of front-to-back symmetrical connecting through holes are opened on the lower surface of the heat-insulating support plate 34. The positions of the two fixed shells 312 correspond one-to-one to the positions of the two groups of connecting through holes on the heat-insulating support plate 34. The fixed shell 312 is hollow, and the inner wall of the bottom end of the fixed shell 312 is fixed and penetrated by a plurality of auxiliary tubes 313 evenly distributed in the left and right directions. A sealing gasket 311 is fixedly connected to the inner circumferential surface of the auxiliary tube 313, and a second groove is provided on the lower surface of the sealing gasket 311.

[0036] like Figure 1 and, Figure 6 Figure 7 As shown, the ventilation mechanism 2 includes two electric telescopic rods 23 fixedly connected on the back of two sliding rails 51, the bottom ends of the two electric telescopic rods 23 are fixedly connected to a linkage plate 24, the upper surface of the linkage plate 24 is fixedly connected to a dispersion strip 22, the top of the dispersion strip 22 is provided with a third groove adapted to the second groove of the lower surface of the sealing gasket 311, the upper surface of the dispersion strip 22 is fixed and connected with a plurality of evenly distributed connecting pipes 21, the lower surface of the heating furnace 1 is fixedly connected to a connecting flange 25, the connecting flange 25 It is fixedly connected to the lower surface of the heating furnace 1 through a connecting plate, and a connecting hose is provided between the front end of the connecting flange 25 and the bottom end of the dispersion strip 22. A card slot adapted to the top end of the dispersion strip 22 is provided at the front end of the heating furnace 1, and the dispersion strip 22 slides in conjunction with the card slot at the front end of the heating furnace 1. A first groove is provided at the bottom end of the connecting through hole on the lower surface of the heat-insulating support plate 34 to facilitate the entry of the dispersion strip 22. There are multiple connecting through holes in each group, and they are evenly distributed along the left and right directions. Any group of connecting through holes corresponds one-to-one to multiple connecting pipes 21.

[0037] During specific use, when heated protective gas is introduced into the inside of the ventilation mechanism 2 and the connecting piece 31, when the insulation support plate 34 drives the fixed shell 312 to move above the dispersion bar 22, the electric telescopic rod 23 contracts and drives the dispersion bar 22 to move upward. At this time, the connecting pipe 21 passes through the connecting hole on the insulation support plate 34 and is inserted into the auxiliary pipe 313, and contacts the sealing gasket 311. The third groove at the top of the connecting pipe 21 and the second groove on the sealing gasket 311 make the connecting pipe 21 and the sealing gasket 311 tightly connected. Then the external heated protective gas is connected to the connecting flange 25, and is transported to the inside of the dispersion bar 22 through the connecting flange 25, and is dispersed to multiple connecting pipes 21 through the dispersion bar 22, and then enters the inside of the fixed shell 312.

[0038] like Figure 3 and Figure 8As shown, the adjusting member 32 includes a dispersion unit 321 fixedly connected to the rear surface of the vertical section on the front side of the groove-shaped heat insulation plate 33, and two groups of upper and lower symmetrical air outlet support pipes 322 are fixedly connected to the rear surface of the dispersion unit 321. The number of each group of air outlet support pipes 322 is multiple and evenly distributed along the left and right directions. The left side of the circumferential surface of the upper group of air outlet support pipes 322 is provided with first air outlet holes evenly distributed along the front and back directions, and the right side of the circumferential surface of the lower group of air outlet support pipes 322 is provided with second air outlet holes evenly distributed along the front and back directions. The front surface of the dispersion unit 321 is fixed with and penetrated by two left-right symmetrical connecting pipes 323, and the front end of the connecting pipe 323 penetrates the vertical section on the front side of the groove-shaped heat insulation plate 33 to the interior of the fixed shell 312 on the front side.

[0039] During specific use, when the fixed shell 312 on the front side is connected to the connecting pipe 21, the heated protective gas enters the interior of the dispersion unit 321 through the fixed shell 312 on the front side, and the dispersion unit 321 distributes the heated protective gas to the interior of the upper and lower rows of exhaust support pipes 322 respectively, and enters the interior of the heating furnace 1 through the exhaust holes in different directions on the upper and lower rows of exhaust 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 at various positions inside the heating furnace 1 is more uniform.

[0040] like Figure 3 and Figure 8 As shown, the vent 35 includes a mounting shell 351 fixedly connected to the rear surface of the fixed shell 312 on the rear side, and a plurality of third air outlet holes are evenly distributed on the rear surface of the mounting shell 351. The interior of the third air outlet holes is fixedly connected to a vent pipe 352, and the front end of the vent pipe 352 passes through the interior of its corresponding connecting member 31.

[0041] During specific use, after the steel product has completed the annealing treatment, the door panel 4 on the front side of the heating furnace 1 is opened again, and the insulation support plate 34 is pulled out to the fixed shell 312 on the rear side through an external pushing device and clamped in front and behind the heating furnace 1. At this time, the fixed shell 312 on the rear side is connected to the connecting pipe 21, and 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. After pulling out the insulation support plate 34, when taking out the steel product on the adjusting part 32, the front end of the heating furnace 1 is closed through the vent pipe 352, and the heated protective gas is continuously transported to the interior of the heating furnace 1. While ensuring that the temperature inside the furnace is lost as little as possible, the interior of the furnace is pre-ventilated to facilitate the next annealing treatment of the steel product.

[0042] Working principle: During specific use, first place the steel product on the adjusting part 32, and then connect it to the heat insulation support plate 34 through the groove on the heat insulation support plate 34 through the external pushing equipment, and then push the heat insulation support plate 34 to the inside of the heating furnace 1, and then start annealing the steel product. The heating furnace 1 starts to heat the steel product, and at the same time, the protective gas is transported to the inside 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 inside of the heating furnace 1, and seals and insulates the furnace of the heating furnace 1 through the rear connecting piece 31. Then the staff removes the steel product on the adjusting part 32, and at the same time pre-ventilates the inside of the furnace through the ventilation mechanism 2 and the rear connecting piece 31, and then repeats the above steps to perform the next annealing operation of the steel product.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present 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 the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating device for steel processing, characterized in that: The invention comprises a heating furnace (1) and a heat insulating layer (6) fixedly connected to the interior of the heating furnace (1); a pulling mechanism (5) is provided on the front side of the heating furnace (1); and a door panel (4) is provided inside the pulling mechanism (5) so as to slide up and down. A processing mechanism (3) for carrying steel for heating, wherein the processing mechanism (3) is slidably arranged in a heating furnace (1) along a front-back direction, and a ventilation mechanism (2) is provided on the heating furnace (1); The processing mechanism (3) includes a heat-insulating support plate (34) slidably connected to the interior of the heating furnace (1), a connecting piece (31) is provided on the upper surface of the heat-insulating support plate (34), a groove-shaped heat-insulating plate (33) is fixedly connected to the upper surface of the heat-insulating support plate (34) and located between the opposite surfaces of the two connecting pieces (31), a regulating piece (32) for uniformly heating the internal temperature of the furnace (1) by using protective gas is provided on the rear surface of the vertical section of the front side of the groove-shaped heat-insulating plate (33), a ventilation piece (35) for pre-ventilating the interior of the furnace is provided on the rear side of the connecting piece (31), and a pull groove connected to an external pushing device is provided on the front surface of the heat-insulating support plate (34).

2. A heating device for steel processing according to claim 1, characterized in that: The ventilation mechanism (2) includes an electric telescopic rod (23) fixedly connected to the pulling mechanism (5), the bottom ends of the two electric telescopic rods (23) are fixedly connected to a linkage plate (24), the upper surface of the linkage plate (24) is fixedly connected to a dispersion strip (22), the upper surface of the dispersion strip (22) is fixedly connected to and penetrated by a plurality of evenly distributed connecting pipes (21), and the lower surface of the heating furnace (1) is fixedly connected to a connecting flange (25).

3. The heating device for steel processing according to claim 2, characterized in that: The connecting flange (25) is fixedly connected to the lower surface of the heating furnace (1) through a connecting plate, and a connecting hose is provided between the front end of the connecting flange (25) and the bottom end of the dispersion strip (22). The front end of the heating furnace (1) is provided with a slot adapted to the top end of the dispersion strip (22), and the dispersion strip (22) is slidably fitted in the slot at the front end of the heating furnace (1).

4. The heating device for steel processing according to claim 2, characterized in that: The lower surface of the heat-insulating support plate (34) is provided with two groups of front-to-back symmetrical connecting through holes, and the bottom ends of the connecting through holes are provided with a first groove for facilitating the entry of the dispersion strip (22). The number of the connecting through holes in each group is multiple and evenly distributed along the left-right direction. Any group of the connecting through holes corresponds one-to-one to a plurality of connecting pipes (21).

5. The heating device for steel processing according to claim 4, characterized in that: The connecting member (31) comprises two front-to-back symmetrical fixed shells (312) fixedly connected to the upper surface of the support plate (34); the positions of the two fixed shells (312) correspond one-to-one to the positions of the two groups of connecting through holes on the heat-insulating support plate (34); the fixed shells (312) are hollow; the inner wall of the bottom end of the fixed shell (312) is fixedly connected and penetrated by a plurality of auxiliary tubes (313) evenly distributed in the left and right directions; a sealing gasket (311) is fixedly connected to the inner circumferential surface of the auxiliary tube (313); a second groove is provided on the lower surface of the sealing gasket (311); and a third groove adapted to the second groove is provided at the top end of the dispersion strip (22).

6. The heating device for steel processing according to claim 1, characterized in that: The regulating member (32) comprises a dispersion unit (321) fixedly connected to the rear surface of the vertical section on the front side of the groove-shaped heat insulation plate (33); the rear surface of the dispersion unit (321) is fixedly connected with two groups of upper and lower symmetrical air outlet support pipes (322); the number of each group of air outlet support pipes (322) is multiple and evenly distributed along the left and right directions; the left side of the circumferential surface of the upper group of air outlet support pipes (322) is provided with first air outlet holes evenly distributed along the front and back directions; the right side of the circumferential surface of the lower group of air outlet support pipes (322) is provided with second air outlet holes evenly distributed along the front and back directions; the front surface of the dispersion unit (321) is fixedly connected with two left and right symmetrical connecting pipes (323).

7. The heating device for steel processing according to claim 5, characterized in that: The ventilator (35) comprises a mounting shell (351) fixedly connected to the rear surface of the fixed shell (312) at the rear side, a plurality of third air outlet holes being evenly distributed on the rear surface of the mounting shell (351), a ventilator tube (352) being fixedly connected inside the third air outlet holes, and a front end of the ventilator tube (352) passing through the interior of its corresponding connecting piece (31).

8. The heating device for steel processing according to claim 1, characterized in that: The rear end of the adjusting member (32) is closed, and the rear end of the adjusting member (32) is fixedly connected to the vertical section on the rear side of the groove-shaped heat insulation board (33).

9. The heating device for steel processing according to claim 1, characterized in that: The size of the connecting piece (31) installed on the heat-insulating support plate (34) is adapted to the size of the front opening of the heating furnace (1); after the heat-insulating support plate (34) is completely inserted into the interior of the heating furnace (1), the front surface of the connecting piece (31) on the front side is in the same plane as the front surface of the heating furnace (1).

10. The heating device for steel processing according to claim 1, characterized in that: 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 ends of the two sliding rails (51) are commonly fixedly connected to a supporting transverse plate (52), the upper surface of the supporting transverse plate (52) is fixedly connected to a plurality of support frames (53), the plurality of support frames (53) are commonly rotatably connected to a rotating shaft (56), the circumferential surface of the rotating shaft (56) is fixedly connected to two left and right symmetrical winding disks (54), a pull rope (55) is wound around the winding disk (54), the end of the pull rope (55) away from the winding disk (54) passes through the bottom of the supporting transverse plate (52) and is fixedly connected to the upper surface of the door panel (4), the door panel (4) is connected to the two sliding rails (51) in an upward and downward sliding manner, and a driving motor is provided on the upper surface of the heating furnace (1), and the output shaft of the driving motor is connected to the rotating shaft (56) through a belt.

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