A continuous processing heat treatment furnace

Abstract

The invention discloses a continuous processing type heat treatment furnace, belonging to the technical field of heat treatment furnaces, comprising: a furnace body, wherein a workpiece inlet, a heat treatment furnace chamber and a workpiece outlet are sequentially provided on the furnace body from the front to the back, a programmable controller is fixedly connected to the outer wall of the front side of the furnace body below the workpiece inlet, a plurality of curtains whose top ends are fixedly connected to the workpiece inlet and adjacent to each other without gaps are evenly arranged inside the workpiece inlet, and a conveying mechanism is installed in the middle of the heat treatment furnace chamber; the invention arranges a rotating rectangular frame, and assembly through grooves are respectively provided on the four sides of the rectangular frame, and a plurality of electric heating tubes are fixedly connected in the assembly through grooves. When the heat treatment furnace is continuously heat-treated, the rectangular frame is driven to rotate by a driving mechanism at a fixed time, and the electric heating tubes in different assembly through grooves are replaced to heat and heat-treat the workpiece. Compared with the prior art, this method can increase the service life of the electric heating tube, that is, extend the service life of the heat treatment furnace.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment furnaces, and in particular relates to a continuous processing type heat treatment furnace. Background Art

[0002] A heat treatment furnace refers to an electric furnace or fuel furnace used to heat the workpiece to be heat treated.

[0003] The commonly used heat treatment furnace is a continuous processing type heat treatment furnace, that is, the workpieces are continuously loaded from the loading door, conveyed through the furnace for heating by a heat-resistant steel conveyor belt, and continuously unloaded from the discharging door. This type of heat treatment furnace can improve the heat treatment efficiency of the workpiece.

[0004] The inventors of the present application have discovered that the existing continuous processing heat treatment furnace generally has only one heating source, that is, the heating source needs to continuously heat from the beginning to the end of the heat treatment in order to maintain the heat treatment function of the heat treatment furnace. Longer working hours are likely to shorten the service life of the heating source, that is, shorten the service life of the heat treatment furnace. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a continuous processing type heat treatment furnace, which has the characteristics of being able to increase the service life of the electric heating tube, that is, extending the service life of the heat treatment furnace.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous processing heat treatment furnace, comprising: a furnace body, on which a workpiece inlet, a heat treatment furnace chamber and a workpiece outlet are sequentially opened from the front to the back, a programmable controller is fixedly connected to the front outer wall of the furnace body below the workpiece inlet, a plurality of curtains are evenly spaced inside the workpiece inlet, the top ends of which are fixed to the workpiece inlet and there is no gap between adjacent curtains, a conveying mechanism is installed in the middle of the heat treatment furnace chamber, a rotary heating mechanism is installed outside the transmission mechanism inside the heat treatment furnace chamber, a self-opening and closing discharging mechanism is installed inside the workpiece outlet, and the conveying mechanism and the rotary heating mechanism are connected to the programmable controller by wires.

[0007] Preferably, the conveying mechanism includes an upper drive motor fixedly connected to the outer wall of the furnace body and two upper drive shafts symmetrically placed inside the heat treatment furnace chamber along the X-direction centerline axis of the furnace body, one end of the upper drive shaft close to the upper drive motor is connected to the output shaft of the upper drive motor through a coupling, the other end of the upper drive shaft close to the upper drive motor is connected to the inner wall of the furnace body through a bearing, and both ends of the upper drive shaft away from the upper drive motor are connected to the inner wall of the furnace body through bearings, an upper drive gear is fixedly sleeved on the outside of the upper drive shaft, and a conveyor belt is meshingly connected between the two upper drive gears, the top sides of which are respectively flush with the bottom end of the workpiece inlet and higher than the bottom end of the workpiece outlet, and the upper drive motor is connected to the programmable controller by wires.

[0008] Preferably, the rotary heating mechanism comprises a lower driving motor fixedly connected to the outer wall of the furnace body, a rectangular frame sleeved outside the conveyor belt, two T-shaped rotating support cylinders fixedly connected to the side of the heat treatment furnace chamber near the workpiece inlet and the workpiece outlet, and a lower driving shaft placed at the bottom of the heat treatment furnace chamber, the rectangular frame is respectively provided with assembly grooves along the four circumferential side walls, a plurality of electric heating tubes are fixedly connected inside the assembly grooves at equal intervals, two gear rings are symmetrically placed on the outer walls at both ends of the rectangular frame, the gear rings and the rectangular frame are fixedly connected by two symmetrical connecting plates, the two gear rings are provided with T-shaped annular rotating grooves that are away from the side openings, the two T-shaped rotating support cylinders extend into the corresponding T-shaped annular rotating grooves near one end of the corresponding gear ring to realize rotational support, the lower driving shaft is connected to the output shaft of the lower driving motor through a coupling at one end near the lower driving motor, and the lower driving shaft is connected to the inner wall of the furnace body through a bearing at one end away from the lower driving motor, two lower middle driving gears that are respectively meshed with the two gear rings are fixedly sleeved on the lower driving shaft, and the lower driving motor is connected to the programmable controller by wires.

[0009] Preferably, the self-opening and closing discharging mechanism includes two L-shaped movable plates which are symmetrically placed in the workpiece outlet, and the two movable plates are rotatably connected to the furnace body away from the side walls. Two fixed plates are symmetrically fixed to the outer wall of the furnace body near the workpiece outlet, and connecting springs are elastically connected between the fixed plates and the corresponding movable plates.

[0010] Preferably, the movable plate is fixedly connected with a plurality of heat-resisting blocks at equal intervals toward the side wall of the heat treatment furnace chamber.

[0011] Preferably, a lower middle follower gear is fixedly sleeved between the two lower middle drive gears on the lower drive shaft, and a lower drive shaft is rotatably connected to one side of the lower drive shaft inside the heat treatment furnace chamber through a bearing, and a lower drive gear and a coding sensor meshing with the lower middle follower gear are fixedly connected to the lower drive shaft in sequence from the side away from the workpiece outlet to the side close to the workpiece outlet, and the coding sensor is connected to the programmable controller by wires.

[0012] Preferably, a heat-resistant battery is fixedly connected to the gap position of the rectangular frame, and the electric heating tube is connected to the battery through a wire.

[0013] Preferably, the T-shaped rotating support cylinder is located in the inner part of the T-shaped annular rotating groove and has two assembly grooves symmetrically opened up and down, a plurality of fixed shafts are fixedly connected inside the assembly grooves at equal intervals, and a rolling sleeve on the fixed shaft is provided with a ball in contact with the wall surface of the gear ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention provides a rotating rectangular frame, and assembly grooves are respectively provided on the four sides of the rectangular frame. A plurality of electric heating tubes are fixedly connected in the assembly grooves. When the heat treatment furnace performs continuous heat treatment, the rectangular frame is driven to rotate by a driving mechanism at a fixed time, and the electric heating tubes in different assembly grooves are replaced to heat the workpiece for heat treatment. Compared with the prior art, this method can increase the service life of the electric heating tubes, that is, extend the service life of the heat treatment furnace.

[0016] 2. The present invention senses the rotation angle of the rectangular frame through a coding sensor, the rotation is precise, and the heat treatment effect is good.

[0017] 3. The rotating mechanism of the rectangular frame of the present invention is supported by the T-shaped rotating support tube extending to the T-shaped annular rotating groove of the gear ring, and then the rotation is realized by rolling balls. This rotation method can change the surface contact into point contact, and the rotation friction is small and the noise is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the present invention;

[0019] Figure 2 It is a vertical cross-sectional view of the present invention;

[0020] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0022] In the figure: 1. furnace body; 2. programmable controller; 3. lower drive motor; 4. upper drive motor; 5. connecting plate; 6. upper drive shaft; 7. assembly through groove; 8. T-shaped rotating support cylinder; 9. lower drive shaft; 10. encoding sensor; 11. lower side drive shaft; 12. lower middle follower gear; 13. lower middle drive gear; 14. lower side drive gear; 15. electric heating tube; 16. upper drive gear; 17. curtain; 18. workpiece inlet; 19. conveyor belt; 20. rectangular frame; 21. heat treatment furnace chamber; 22. battery; 23. gear ring; 24. T-shaped annular rotating groove; 25. assembly groove; 26. fixed shaft; 27. ball; 28. fixed plate; 29. ​​connecting spring; 30. workpiece outlet; 31. heat resistance block; 32. movable plate; 33. connecting shaft. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1

[0025] See also Figure 1-4 The present invention provides the following technical solutions: A continuous processing heat treatment furnace, comprising: a furnace body 1, on which a workpiece inlet 18, a heat treatment furnace chamber 21 and a workpiece outlet 30 are sequentially provided from the front to the back, a programmable controller 2 is fixedly connected to the front outer wall of the furnace body 1 below the workpiece inlet 18, a plurality of curtains 17 whose top ends are fixedly connected to the workpiece inlet 18 and have no gaps between adjacent curtains are evenly spaced inside the workpiece inlet 18, a conveying mechanism is installed in the middle of the heat treatment furnace chamber 21, a rotary heating mechanism is installed outside the transmission mechanism inside the heat treatment furnace chamber 21, a self-opening and closing discharging mechanism is installed inside the workpiece outlet 30, and the conveying mechanism and the rotary heating mechanism are connected to the programmable controller 2 by wires.

[0026] Specifically, the conveying mechanism includes an upper drive motor 4 fixedly connected to the outer wall of the furnace body 1 and two upper drive shafts 6 symmetrically placed inside the heat treatment furnace chamber 21 along the centerline axis of the furnace body 1X. One end of the upper drive shaft 6 close to the upper drive motor 4 is connected to the output shaft of the upper drive motor 4 through a coupling, and the other end of the upper drive shaft 6 close to the upper drive motor 4 is connected to the inner wall of the furnace body 1 through a bearing. Both ends of the upper drive shaft 6 away from the upper drive motor 4 are connected to the inner wall of the furnace body 1 through bearings. An upper drive gear 16 is fixedly sleeved on the outside of the upper drive shaft 6. The two upper drive gears 16 are meshingly connected with a conveyor belt 19 whose top sides are respectively flush with the bottom of the workpiece inlet 18 and higher than the bottom of the workpiece outlet 30. The upper drive motor 4 is connected to the programmable controller 2 by wires.

[0027] Specifically, the rotary heating mechanism includes a lower driving motor 3 fixedly connected to the outer wall of the furnace body 1, a rectangular frame 20 sleeved outside the conveyor belt 19, two T-shaped rotating support cylinders 8 fixedly connected to the heat treatment furnace chamber 21 near the workpiece inlet 18 and the workpiece outlet 30, and a lower driving shaft 9 placed at the bottom of the heat treatment furnace chamber 21. The rectangular frame 20 is respectively provided with assembly grooves 7 along the four circumferential side walls, and a plurality of electric heating tubes 15 are fixedly connected to the assembly grooves 7 at equal intervals. Two toothed rings 23 are symmetrically placed on the outer walls at both ends of the rectangular frame 20, and the toothed rings 23 and the rectangular frame 20 are connected by two symmetrical connecting rods. The connecting plate 5 is fixedly connected, and T-shaped annular rotating grooves 24 with side openings away from each other are opened inside the two gear rings 23. Two T-shaped rotating support cylinders 8 extend from one end close to the corresponding gear ring 23 to the corresponding T-shaped annular rotating grooves 24 to realize rotational support. The end of the lower drive shaft 9 close to the lower drive motor 3 is connected to the output shaft of the lower drive motor 3 through a coupling, and the end of the lower drive shaft 9 away from the lower drive motor 3 is connected to the inner wall of the furnace body 1 through a bearing. Two lower middle drive gears 13 respectively meshed with the two gear rings 23 are fixedly sleeved on the lower drive shaft 9, and the lower drive motor 3 is connected to the programmable controller 2 by wires.

[0028] Specifically, the self-opening and closing discharge mechanism includes two L-shaped movable plates 32 symmetrically placed in the workpiece outlet 30, and the two movable plates 32 are rotatably connected to the furnace body 1 away from the side wall. Two fixed plates 28 are symmetrically fixed to the outer wall of the furnace body 1 near the workpiece outlet 30, and connecting springs 29 are elastically connected between the fixed plates 28 and the corresponding movable plates 32.

[0029] Specifically, a plurality of heat-resisting blocks 31 are fixedly connected to the movable plate 32 at equal intervals toward the side wall of the heat treatment furnace chamber 21 .

[0030] The working principle of this embodiment:

[0031] Before heat treatment in the continuous processing heat treatment furnace, the front conveying mechanism for conveying the workpiece to be heat treated is placed on the workpiece inlet 18 side of the furnace body 1 and is in close contact with the workpiece inlet 18, and the rear conveying mechanism for conveying the workpiece after heat treatment is placed on the workpiece outlet 30 side of the furnace body 1 and is in close contact with the workpiece outlet 30;

[0032] During heat treatment in the continuous processing heat treatment furnace, the upper drive motor 4 and the plurality of electric heating tubes 15 in the upper assembly slot 7 of the rectangular frame 20 are started by the programmable controller 2, the upper drive motor 4 drives the output shaft to rotate, the output shaft of the upper drive motor 4 drives the connected upper drive shaft 6 to rotate, the connected upper drive shaft 6 drives the connected upper drive gear 16 to rotate, the connected upper drive gear 16 drives the meshing conveyor belt 19 to rotate, the conveyor belt 19 drives another meshing upper drive gear 16 to rotate, the two upper drive gears 16 rotate to realize the transmission of the conveyor belt 19, the plurality of electric heating tubes 15 are heated to generate heat, the workpiece to be heat treated is placed on the front conveying mechanism, and the front conveying mechanism passes the workpiece inlet 18 to The workpiece to be heat treated is transported to the conveyor belt 19, and the conveyor belt 19 continues to transport the workpiece to be heat treated. The heat generated by the multiple electric heating tubes 15 heat treats the workpiece. The workpiece after heat treatment is transported to the gap position of the two movable plates 32 in the workpiece outlet 30 through the conveyor belt 19. Due to the self-gravity of the workpiece, the two movable plates 32 are respectively rotated outward along the corresponding connecting shafts 33 to open. The workpiece is transported to the rear conveying mechanism through the workpiece outlet 30, and is transported to the next process by the rear conveying mechanism. At this time, the two movable plates 32 lose the gravity of the workpiece, and are respectively rotated inward and closed along the corresponding connecting shafts 33 under the reset force of the corresponding connecting springs 29. This cycle is repeated to complete the continuous heat treatment processing of the heat treatment furnace.

[0033] During the continuous processing of the continuous processing type heat treatment furnace, the programmable controller 2 is required to control the start of the lower drive motor 3 in a timely manner, and the lower drive motor 3 drives the output shaft to rotate. The output shaft of the lower drive motor 3 drives the lower drive shaft 9 to rotate, and the lower drive shaft 9 drives the two lower middle drive gears 13 to rotate. The two lower middle drive gears 13 respectively drive the two meshing connected gear rings 23 to rotate, and the two gear rings 23 respectively drive the two connected connecting plates 5 to rotate, and the four connecting plates 5 drive the rectangular frame 20 to rotate until the rectangular frame 20 rotates ninety degrees, and the multiple electric heating tubes 15 in the other assembly slot 7 are located on the upper side of the conveyor belt 19 and stop. At this time, the original multiple electric heating tubes 15 are closed, and another multiple electric heating tubes 15 are opened. This cycle is repeated regularly to realize the recycling of multiple orientation electric heating tubes 15 and extend the service life of the electric heating tubes 15.

[0034] Example 2

[0035] The difference between this embodiment and embodiment 1 is that:

[0036] Specifically, a lower middle follower gear 12 is fixedly sleeved between the two lower middle drive gears 13 on the lower drive shaft 9, and a lower drive shaft 11 is rotatably connected to one side of the lower drive shaft 9 inside the heat treatment furnace chamber 21 through a bearing, and a lower drive gear 14 meshing with the lower middle follower gear 12 and an encoding sensor 10 are fixedly connected to the lower drive shaft 11 in sequence from the side away from the workpiece outlet 30 to the side close to the workpiece outlet 30, and the encoding sensor 10 is connected to the programmable controller 2 by wires.

[0037] The working principle of this embodiment:

[0038] In the above process, the lower driving shaft 9 drives the two lower middle driving gears 13 to rotate while driving the lower middle follower gear 12 to rotate synchronously, the lower middle follower gear 12 drives the lower side driving gear 14 to rotate, the lower side driving gear 14 drives the lower side driving shaft 11 to rotate, and the lower side driving shaft 11 drives the encoding sensor 10 to rotate, and the rotation angle of the rectangular frame 20 is determined by the encoding sensor 10.

[0039] Example 3

[0040] The difference between this embodiment and embodiment 2 is that:

[0041] Specifically, a heat-resistant battery 22 is fixedly connected to the gap position of the rectangular frame 20 , and the electric heating tube 15 is connected to the battery 22 by a wire.

[0042] The working principle of this embodiment:

[0043] In the above process, the heat-resistant battery 22 directly supplies power to the electric heating tube 15, thereby avoiding the trouble of power supply caused by the rotating electric heating tube 15.

[0044] Example 4

[0045] The difference between this embodiment and embodiment 3 is that:

[0046] Specifically, the T-shaped rotating support cylinder 8 is located inside the T-shaped annular rotating groove 24 and has two assembly grooves 25 symmetrically opened up and down. A plurality of fixed shafts 26 are fixedly connected inside the assembly grooves 25 at equal intervals. The fixed shafts 26 are rollingly sleeved with balls 27 in contact with the wall surface of the gear ring 23 .

[0047] The working principle of this embodiment:

[0048] In the above process, when the gear ring 23 rotates on the T-shaped rotating support cylinder 8, it comes into surface contact with the ball 27, that is, the rigid contact with the T-shaped rotating support cylinder 8 is changed into rolling contact with the ball 27, thereby reducing friction and noise generation.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous processing heat treatment furnace, characterized in that: include: A furnace body (1), wherein the furnace body (1) is provided with a workpiece inlet (18), a heat treatment furnace chamber (21) and a workpiece outlet (30) in sequence from the front to the back, a programmable controller (2) is fixedly connected to the front outer wall of the furnace body (1) below the workpiece inlet (18), a plurality of curtains (17) are evenly spaced inside the workpiece inlet (18), the top ends of which are fixedly connected to the workpiece inlet (18) and there is no gap between adjacent curtains, a conveying mechanism is arranged in the middle of the heat treatment furnace chamber (21), a rotary heating mechanism is arranged outside the transmission mechanism inside the heat treatment furnace chamber (21), a self-opening and closing discharge mechanism is arranged inside the workpiece outlet (30), and the conveying mechanism and the rotary heating mechanism are connected to the programmable controller (2) by wires; The conveying mechanism comprises an upper drive motor (4) fixedly connected to the outer wall of the furnace body (1) and two upper drive shafts (6) symmetrically arranged inside the heat treatment furnace chamber (21) along the X-axis of the furnace body (1), one end of the upper drive shaft (6) close to the upper drive motor (4) is connected to the output shaft of the upper drive motor (4) through a coupling, the other end of the upper drive shaft (6) close to the upper drive motor (4) is connected to the inner wall of the furnace body (1) through a bearing, and both ends of the upper drive shaft (6) away from the upper drive motor (4) are connected to the inner wall of the furnace body (1) through bearings, the upper drive shaft (6) is fixedly sleeved with an upper drive gear (16) outside, and the two upper drive gears (16) are meshingly connected to a conveyor belt (19) whose top sides are respectively flush with the bottom of the workpiece inlet (18) and higher than the bottom of the workpiece outlet (30), and the upper drive motor (4) is connected to the programmable controller (2) through a wire. The rotary heating mechanism comprises a lower driving motor (3) fixedly connected to the outer wall of the furnace body (1), a rectangular frame (20) sleeved outside the conveyor belt (19), two T-shaped rotating support cylinders (8) fixedly connected to the heat treatment furnace chamber (21) near the workpiece inlet (18) and the workpiece outlet (30) on one side, and a lower driving shaft (9) placed at the lower part of the heat treatment furnace chamber (21), wherein the rectangular frame (20) is provided with assembly slots (7) along four circumferential side walls respectively, and a plurality of electric heating tubes (15) are fixedly connected at equal intervals inside the assembly slots (7), and two toothed rings (23) are symmetrically placed on the outer walls at both ends of the rectangular frame (20), and the toothed rings (23) and the rectangular frame (20) are connected by two symmetrical The two gear rings (23) are fixedly connected, and T-shaped annular rotating grooves (24) with side openings away from each other are opened inside the two gear rings (23). Two T-shaped rotating support cylinders (8) extend into the corresponding T-shaped annular rotating grooves (24) at one end close to the corresponding gear ring (23) to realize rotating support. The end of the lower drive shaft (9) close to the lower drive motor (3) is connected to the output shaft of the lower drive motor (3) through a coupling, and the end of the lower drive shaft (9) away from the lower drive motor (3) is connected to the inner wall of the furnace body (1) through a bearing. Two lower middle drive gears (13) respectively meshing with the two gear rings (23) are fixedly sleeved on the lower drive shaft (9), and the lower drive motor (3) is connected to the programmable controller (2) by wires.

2. A continuous processing heat treatment furnace according to claim 1, characterized in that: The self-opening and closing discharge mechanism comprises two L-shaped movable plates (32) symmetrically arranged in the workpiece outlet (30) in an upper and lower manner, the two movable plates (32) being rotatably connected to the furnace body (1) at the side walls away from each other, and two fixed plates (28) being symmetrically fixedly connected to the side walls of the furnace body (1) close to the workpiece outlet (30) in an upper and lower manner, and a connecting spring (29) being elastically connected between the fixed plates (28) and the corresponding movable plates (32).

3. A continuous processing heat treatment furnace according to claim 2, characterized in that: The movable plate (32) is fixedly connected with a plurality of heat-resisting blocks (31) at equal intervals toward the side wall of the heat treatment furnace chamber (21).

4. A continuous processing heat treatment furnace according to claim 3, characterized in that: A lower middle follower gear (12) is fixedly sleeved between two lower middle drive gears (13) on the lower drive shaft (9); a lower drive shaft (11) is rotatably connected to one side of the lower drive shaft (9) inside the heat treatment furnace chamber (21) via a bearing; a lower drive gear (14) meshingly connected to the lower middle follower gear (12) and an encoding sensor (10) are fixedly connected to the lower drive shaft (11) in sequence from the side away from the workpiece outlet (30) to the side close to the workpiece outlet (30); and the encoding sensor (10) is connected to the programmable controller (2) by a wire.

5. A continuous processing heat treatment furnace according to claim 4, characterized in that: A heat-resistant storage battery (22) is fixedly connected to the gap position of the rectangular frame (20), and a wire is connected between the electric heating tube (15) and the storage battery (22).

6. A continuous processing heat treatment furnace according to claim 5, characterized in that: The T-shaped rotating support cylinder (8) is located in the T-shaped annular rotating groove (24) and has two assembly grooves (25) symmetrically formed in the upper and lower parts. A plurality of fixed shafts (26) are fixedly connected at equal intervals inside the assembly grooves (25). The fixed shafts (26) are rollingly sleeved with balls (27) in contact with the wall surface of the gear ring (23).

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