Continuous protective atmosphere anaerobic positive annealing furnace

Abstract

The invention relates to the technical field of annealing furnaces, in particular to a continuous protective atmosphere anaerobic positive annealing furnace which comprises a base, a furnace body and a furnace door. The furnace doors are arranged on the inner side and the outer side of the furnace opening and are in sliding connection with the furnace body; the device further comprises a sliding block. The sliding block is placed on the base, a sliding frame is slidably connected to the outer side of the sliding block, and closing plates are rotatably connected to the four sides of the sliding block; the sliding block and the closing plate are arranged, a workpiece is placed on the sliding block, the closing plate covers the workpiece, the box body formed by the sliding block and the closing plate is filled with protective gas the same as the protective gas in the furnace body, and then the box body formed by the sliding block and the closing plate enters the furnace body through the two furnace doors and is moved out of the furnace body in the same mode. Therefore, compared with the mode of blowing the protective gas outwards from the furnace door in the prior art, the method has the advantages that the protective gas is saved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of annealing furnaces, in particular to a continuous protective atmosphere oxygen-free positive annealing furnace. Background Art

[0002] Annealing is a heating and slow cooling process, which is mainly used to eliminate the internal stress of metal materials, improve plasticity and toughness, and adjust their grain structure. The continuous protective atmosphere oxygen-free annealing furnace is a heat treatment equipment for metals or alloys, which is mainly used to improve the properties of materials. The protective gas in the furnace acts as a protective atmosphere to prevent the metal from oxidizing during the heating process, which helps to maintain the surface quality of the material and prevent oxidation and decarburization. The doors of the continuous annealing furnace are on both sides of the furnace body. The workpieces that need to be heated for annealing enter the annealing furnace from the door on one side of the annealing furnace, and then are transferred out of the annealing furnace from the door on the other side of the annealing furnace, so that the workpieces complete the annealing. Since protective gas is used as protective atmosphere in the positive annealing furnace, the furnace door is not closed when the positive annealing furnace is in continuous use, and the protective gas in the positive annealing furnace is blown out from the furnace door, thereby preventing the air outside the furnace from entering the positive annealing furnace and affecting the oxygen-free environment in the positive annealing furnace; Blowing the protective gas out from the furnace door results in a large consumption of the protective gas, which increases the production cost and thus causes limitations.

[0003] Therefore, we propose a continuous protective atmosphere oxygen-free normal annealing furnace. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a continuous protective atmosphere oxygen-free normal annealing furnace, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a continuous protective atmosphere oxygen-free normal annealing furnace, comprising: A base, a furnace body and a furnace door; the furnace body is provided with furnace openings at both ends; the furnace doors are arranged at both inside and outside of the furnace opening, and the furnace doors are slidably connected to the furnace body; a sliding door unit is arranged on the furnace body for moving the furnace door; The present invention also includes a sliding block; the sliding block is placed on a base, a sliding frame is slidably connected to the outer side of the sliding block, and a closing plate is rotatably connected to the four sides of the sliding block; a connecting rod is hinged on the closing plate; after the sliding frame moves, it can drive the connecting rod to move; the closing plate can form a box body after rotating upward; an arc-shaped top block is installed on the base; the arc-shaped top block is located on the inner and outer sides of the furnace mouth.

[0006] Preferably, the arc-shaped top block is slidably connected to the furnace body; a lifting electric push rod is fixedly connected to the furnace body; the lifting electric push rod drives the arc-shaped top block to move; an electromagnet block is fixedly connected inside the arc-shaped top block.

[0007] Preferably, an inflation groove is provided on the base; an inflation electric push rod is fixedly connected in the inflation groove; an inflation block is fixedly connected to the output end of the inflation electric push rod; an inflation interface is fixedly connected to the inflation block; an air intake check valve and an exhaust check valve are fixedly connected to the closing plate; and the inflation interface is connected to the protective gas.

[0008] By setting a sliding block and a closing plate, the workpiece is placed on the sliding block, the closing plate covers the workpiece, and then the box formed by the sliding block and the closing plate is filled with the same protective gas as that in the furnace body. Then the box formed by the sliding block and the closing plate enters the furnace body through two furnace doors, and then is moved out of the furnace body in the same way, thereby completing the positive annealing of the workpiece. Therefore, compared with the method of blowing protective gas out from the furnace door in the prior art, the present invention saves protective gas and reduces costs.

[0009] Preferably, an arc block is fixedly connected to the furnace body; the arc block is arranged close to the furnace door, and the arc block is located on both sides of the furnace door; an arc groove is opened on the arc block; an arc plate is slidably connected in the arc groove; a rotating shaft is rotatably connected to the arc block; an adjusting gear is fixedly connected to the rotating shaft; an arc rack meshing with the adjusting gear is fixedly connected to the arc plate.

[0010] Preferably, one end of the arc-shaped plate away from the arc-shaped block is fixedly connected with a C-shaped plate.

[0011] Preferably, a telescopic groove is provided on the furnace door located in the furnace body; a telescopic spring is fixedly connected in the telescopic groove, and a telescopic block is slidably connected in the telescopic groove; and the telescopic block is fixedly connected to the telescopic spring.

[0012] Preferably, the two telescopic slots on the furnace door are arranged to be inclined in an eight-shaped shape.

[0013] After the strip-shaped workpiece enters the furnace body, the space on both sides and above the strip-shaped workpiece is blocked, thereby minimizing the gap on both sides and above the strip-shaped workpiece, thereby reducing the consumption of protective gas when blowing protective gas to the outside, thereby saving costs.

[0014] Preferably, the sliding block is in the shape of an inverted quadrangular stepped terrace; through grooves are provided on the four sides of the upper end of the sliding block; the connecting rod passes through the through groove, and the end of the connecting rod away from the closing plate is hinged to the sliding frame; a closing plate is rotatably connected to the sliding frame, and a pulling groove is provided on the sliding frame; a pulling block is slidably connected in the pulling groove; a pulling rope is fixedly connected to the pulling block; the other end of the pulling rope is fixedly connected to the closing plate; the top end of the closing plate is arranged in an oblique shape; the sliding block is fitted with the closing plate, and after the sliding frame pulls the closing plate downward to rotate, the outer side surfaces of the sliding frame, the closing plate and the closing plate form a plane.

[0015] Beneficial effects of the present invention: 1. The present invention arranges a sliding block and a closing plate, places the workpiece on the sliding block, covers the workpiece with the closing plate, and then fills the box formed by the sliding block and the closing plate with the same protective gas as that in the furnace body. Subsequently, the box formed by the sliding block and the closing plate enters the furnace body through two furnace doors, and then moves out of the furnace body in the same way, thereby completing the positive annealing of the workpiece. Therefore, compared with the method of blowing protective gas out from the furnace door in the prior art, the present invention saves protective gas and reduces costs.

[0016] The present invention blocks the space on both sides and above the strip workpiece after the strip workpiece enters the furnace body, thereby minimizing the gap on both sides and above the strip workpiece, thereby reducing the consumption of protective gas when blowing protective gas outward, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 2 A cross-sectional view of the base, the sliding block, the closing plate, the blocking plate and the sliding frame at the cross-sectional view at the middle BB; Figure 4 for Figure 3 Enlarged view of point C in the middle; Figure 5 It is a cross-sectional view of the furnace body, furnace door and arc block in the present invention; Figure 6 for Figure 5 Enlarged view of point D in the middle.

[0018] In the figure: 1. base; 11. furnace body; 12. furnace door; 13. furnace mouth; 14. sliding door unit; 2. sliding block; 21. sliding frame; 22. closing plate; 23. connecting rod; 24. arc top block; 3. arc block; 31. arc groove; 32. arc plate; 33. rotating shaft; 34. adjusting gear; 35. arc rack; 36. lifting electric push rod; 37. C-shaped plate; 38. electromagnet block; 4. through groove; 41. blocking plate; 42. pulling groove; 43. pulling block; 44. pulling rope; 5. inflation groove; 51. inflation electric push rod; 52. inflation block; 53. inflation interface; 54. intake check valve; 55. exhaust check valve; 6. telescopic groove; 61. telescopic spring; 62. telescopic block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1: Refer to the attached specification Figure 1 , 2 and 3. A continuous protective atmosphere oxygen-free normal annealing furnace, comprising: A base 1, a furnace body 11 and a furnace door 12; furnace openings 13 are provided at both ends of the furnace body 11; the furnace door 12 is arranged at both ends of the furnace opening 13, and the furnace door 12 is slidably connected to the furnace body 11; a sliding door unit 14 is provided on the furnace body 11 for moving the furnace door 12; The present invention also includes a sliding block 2; the sliding block 2 is placed on the base 1, the sliding block 2 is slidably connected to the outer side of the sliding block 2 with a sliding frame 21, and the four sides of the sliding block 2 are rotatably connected to a closing plate 22; a connecting rod 23 is hinged on the closing plate 22; after the sliding frame 21 moves, it can drive the connecting rod 23 to move; after the closing plate 22 rotates upward, a box body can be formed; an arc-shaped top block 24 is installed on the base 1; the arc-shaped top block 24 is located on the inner and outer sides of the furnace mouth 13.

[0021] In the present invention, the arc top block 24 is slidably connected to the furnace body 11; the furnace body 11 is fixedly connected with a lifting electric push rod 36; the lifting electric push rod 36 drives the arc top block 24 to move; and an electromagnet block 38 is fixedly connected inside the arc top block 24.

[0022] In the present invention, an inflation groove 5 is opened on the base 1; an inflation electric push rod 51 is fixedly connected in the inflation groove 5; an inflation block 52 is fixedly connected to the output end of the inflation electric push rod 51; an inflation interface 53 is fixedly connected to the inflation block 52; an intake check valve 54 and an exhaust check valve 55 are fixedly connected to the closing plate 22; and the inflation interface 53 is connected to the protective gas.

[0023] In the present invention, the lifting electric push rod 36 pushes the arc top block 24 upward, so that the arc top block 24 pushes the sliding frame 21 upward, so that the connecting rod 23 pushes the closing plate 22, so that the closing plate 22 opens. After the staff places the workpiece to be annealed on the sliding block 2, the arc top block 24 moves downward, the electromagnet is energized, and the sliding frame 21 made of metal pulls the connecting rod 23 downward under the action of magnetic force, so that the closing plate 22 is closed again, covering the workpiece above the sliding block 2, and then the inflatable electric push rod 51 drives the inflatable block 52 to move in the direction close to the closing plate 22, so that the inflatable interface 53 is connected to the air inlet check valve 54 on the closing plate 22, and the protective gas is filled into the box formed by the closing plate 22. The air in the box formed by the closing plate 22 is discharged from the exhaust check valve 55, and then the inflatable block 52 returns to its original position, pushing the sliding block 2, so that the sliding block 2 and the closing plate 22 move toward the furnace door 12 together, the furnace door 12 outside the furnace opening 13 is opened, and the sliding block 2 and the closing plate 22 enter the furnace opening 13, completely filling the space inside the furnace opening 13, and then the outer furnace door 12 is closed, and the furnace door 12 inside the furnace opening 13 is opened. When the sliding block 2 and the closing plate 22 move forward to the arc-shaped top block 24 inside the furnace opening 13, the arc-shaped top block 24 inside the furnace opening 13 pushes the sliding frame 21 upward, so that the closing plate 22 opens, and the sliding block 2 moves forward in the furnace body 11 with the workpiece and the closing plate 22, completing the positive annealing; The sliding block 2 and the closing plate 22 carry the workpiece and move in the furnace body 11 to the furnace door 12 inside the furnace opening 13 on the other side, and the arc-shaped push-up block pushes upward to close the closing plate 22, and then the inner furnace door 12 opens, and the box formed by the sliding block 2 and the closing plate 22 enters the furnace opening 13, the inner furnace door 12 closes, and the outer furnace door 12 opens, so that the sliding block 2, the closing plate 22 and the workpiece move out of the furnace body 11, thereby completing the positive annealing of the workpiece; In the present invention, a circulation track can be set at both ends of the furnace body 11, that is, the sliding block 2 and the closing plate 22 carrying the workpiece after annealing at the other end are moved to this end to form a circulation; The present invention arranges a sliding block 2 and a closing plate 22, places the workpiece on the sliding block 2, covers the workpiece with the closing plate 22, and then fills the box formed by the sliding block 2 and the closing plate 22 with the same protective gas as that in the furnace body 11, then the box formed by the sliding block 2 and the closing plate 22 enters the furnace body 11 through two furnace doors 12, and then moves out of the furnace body 11 in the same way, thereby completing the positive annealing of the workpiece. Therefore, compared with the method of blowing protective gas out from the furnace door 12 in the prior art, the present invention saves protective gas and thus reduces costs.

[0024] Refer to the instruction manual Figure 1 , 5and 6. In the present invention, an arc block 3 is fixedly connected to the furnace body 11; the arc block 3 is arranged close to the furnace door 12, and the arc block 3 is located on both sides of the furnace door 12; an arc groove 31 is opened on the arc block 3; an arc plate 32 is slidably connected in the arc groove 31; a rotating shaft 33 is rotatably connected to the arc block 3; an adjusting gear 34 is fixedly connected to the rotating shaft 33; an arc rack 35 meshing with the adjusting gear 34 is fixedly connected to the arc plate 32.

[0025] In the present invention, one end of the arc plate 32 away from the arc block 3 is fixedly connected with a C-shaped plate 37 .

[0026] In the present invention, a telescopic slot 6 is provided on the furnace door 12 in the furnace body 11 ; a telescopic spring 61 is fixedly connected in the telescopic slot 6 ; a telescopic block 62 is slidably connected in the telescopic slot 6 ; and the telescopic block 62 is fixedly connected to the telescopic spring 61 .

[0027] In the present invention, the two expansion slots 6 on the furnace door 12 are arranged in an oblique manner in an "eight" shape.

[0028] In the present invention, when the present invention performs positive annealing on a strip-shaped workpiece (such as a rolled profile), the sliding block 2 and the closing plate 22 will not be used, and a method of blowing protective gas to the outside of the furnace mouth 13 is used; the strip-shaped workpiece directly enters the furnace mouth 13, and the furnace door 12 in the furnace mouth 13 moves downward to contact the strip-shaped workpiece. The staff rotates the rotating shaft 33 so that the arc plates 32 on both sides approach the strip-shaped workpiece, and the C-shaped plate 37 contacts the strip-shaped workpiece. At the same time, the telescopic block 62 on the furnace door 12 contacts the arc plate 32, so that the space on both sides of the strip-shaped workpiece is blocked by the arc plate 32, and the space above the strip-shaped workpiece is blocked by the furnace door 12. At the same time, the space between the arc plate 32 and the furnace door 12 is blocked by the telescopic block 62, so that the gaps on both sides and above the strip-shaped workpiece are minimized. Therefore, when the method of blowing protective gas to the outside of the furnace door 12 is used, the consumption of protective gas can be reduced. The present invention blocks the space on both sides and above the strip workpiece after the strip workpiece enters the furnace body 11, thereby minimizing the gap on both sides and above the strip workpiece, thereby reducing the consumption of protective gas when blowing protective gas outward, thereby saving costs.

[0029] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 2 , 34. In the present invention, the sliding block 2 is in the shape of an inverted quadrangular stepped terrace; through grooves 4 are provided on the four sides of the upper end of the sliding block 2; the connecting rod 23 passes through the through groove 4, and the end of the connecting rod 23 away from the closing plate 22 is hinged to the sliding frame 21; a closing plate 41 is rotatably connected to the sliding frame 21, and a pulling groove 42 is provided on the sliding frame 21; a pulling block 43 is slidably connected in the pulling groove 42; a pulling rope 44 is fixedly connected to the pulling block 43; the other end of the pulling rope 44 is fixedly connected to the closing plate 41; the top of the closing plate 41 is set to an oblique shape; the sliding block 2 is fitted with the closing plate 41, and after the sliding frame 21 pulls the closing plate 22 downward to rotate, the outer side surfaces of the sliding frame 21, the closing plate 41 and the closing plate 22 form a plane.

[0030] In the present invention, a sealing plate 41 is arranged on the sliding frame 21. When the sliding frame 21 moves upward, the sealing plate 41 moves along the outer wall of the sliding block 2 and rotates outward, while pulling the pulling block 43 upward. When the sliding frame 21 moves downward so that the closing plate 22 is closed, the sealing plate 41 fits with the sliding block 2 under the pulling of the pulling block 43, and the closing plate 22, the sealing plate 41 and the side of the sliding frame 21 are in the same plane. Therefore, when entering the furnace mouth 13, the four sealing plates 41 surround the lower part of the sliding block 2, and the through groove 4 connects the upper and lower parts of the sliding block 2. The protective gas above the sliding block 2 can enter the sealing plate 41 below, so that the sealing plate 41 occupies the space inside the furnace mouth 13, preventing the gap below the inverted quadrangular stepped terrace-shaped sliding block 2 from carrying air into the furnace mouth 13 and affecting the environment inside the inverted furnace body 11.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected; the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A continuous protective atmosphere oxygen-free normal annealing furnace, comprising: A base (1), a furnace body (11) and a furnace door (12); furnace openings (13) are provided at both ends of the furnace body (11); the furnace door (12) is arranged at both ends of the furnace opening (13), and the furnace door (12) is slidably connected to the furnace body (11); a sliding door unit (14) is provided on the furnace body (11) for moving the furnace door (12); The invention is characterized in that: it also includes a sliding block (2); the sliding block (2) is placed on the base (1); the sliding block (2) is slidably connected to a sliding frame (21) on the outside of the sliding block (2); the four sides of the sliding block (2) are rotatably connected to a closing plate (22); a connecting rod (23) is hinged on the closing plate (22); after the sliding frame (21) moves, it can drive the connecting rod (23) to move; after the closing plate (22) rotates upward, it can form a box body; an arc-shaped top block (24) is installed on the base (1); the arc-shaped top block (24) is located on the inner and outer sides of the furnace mouth (13).

2. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 1, characterized in that: The arc-shaped top block (24) is slidably connected to the furnace body (11); a lifting electric push rod (36) is fixedly connected to the furnace body (11); the lifting electric push rod (36) drives the arc-shaped top block (24) to move; an electromagnet block (38) is fixedly connected inside the arc-shaped top block (24).

3. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 2, characterized in that: The base (1) is provided with an air filling groove (5); an air filling electric push rod (51) is fixedly connected in the air filling groove (5); an air filling block (52) is fixedly connected to the output end of the air filling electric push rod (51); an air filling interface (53) is fixedly connected to the air filling block (52); an air intake check valve (54) and an air exhaust check valve (55) are fixedly connected to the closing plate (22); and the air filling interface (53) is connected to the protective gas.

4. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 3, characterized in that: An arc block (3) is fixedly connected to the furnace body (11); the arc block (3) is arranged close to the furnace door (12), and the arc block (3) is located on both sides of the furnace door (12); an arc groove (31) is provided on the arc block (3); an arc plate (32) is slidably connected in the arc groove (31); a rotating shaft (33) is rotatably connected to the arc block (3); an adjusting gear (34) is fixedly connected to the rotating shaft (33); and an arc rack (35) meshing with the adjusting gear (34) is fixedly connected to the arc plate (32).

5. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 4, characterized in that: One end of the arc-shaped plate (32) away from the arc-shaped block (3) is fixedly connected to a C-shaped plate (37).

6. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 5, characterized in that: A telescopic slot (6) is provided on the furnace door (12) located in the furnace body (11); a telescopic spring (61) is fixedly connected in the telescopic slot (6); a telescopic block (62) is slidably connected in the telescopic slot (6); and the telescopic block (62) is fixedly connected to the telescopic spring (61).

7. A continuous protective atmosphere oxygen-free normal annealing furnace according to claim 6, characterized in that: The two telescopic slots (6) on the furnace door (12) are arranged in an inclined manner in an eight-shaped shape.

8. The continuous protective atmosphere oxygen-free normal annealing furnace according to claim 7, characterized in that: The sliding block (2) is in the shape of an inverted quadrangular stepped terrace; through grooves (4) are provided on four sides of the upper end of the sliding block (2); the connecting rod (23) passes through the through groove (4); the end of the connecting rod (23) away from the closing plate (22) is hinged to the sliding frame (21); a blocking plate (41) is rotatably connected to the sliding frame (21); a pulling groove (42) is provided on the sliding frame (21); a A pulling block (43); a pulling rope (44) is fixedly connected to the pulling block (43); the other end of the pulling rope (44) is fixedly connected to the blocking plate (41); the top end of the blocking plate (41) is arranged to be inclined; the sliding block (2) is in contact with the blocking plate (41), and after the sliding frame (21) pulls the blocking plate (22) downward to rotate, the outer side surfaces of the sliding frame (21), the blocking plate (41) and the blocking plate (22) form a plane.

Images