A heating furnace

Abstract

The present invention discloses a heating furnace, comprising a heating chamber, which has a material inlet and a material outlet, a conveying rail arranged along the direction from the material inlet to the material outlet is arranged inside, and a toggle mechanism for driving the conveying rail to rotate is arranged outside; a lifting device, one side of which is provided with a material hopper, and the upper part is provided with a material discharge port; a material discharge track, which is obliquely arranged between the material discharge port and the material inlet; and a support plate and a material discharge mechanism, the support plate is installed at the material inlet of the heating chamber, and the material discharge mechanism is installed on the support plate and is located at the inclined lower end of the material discharge track. The present invention has a reasonable structure, adopts an inclined material discharge track, is not adjacent to the heating chamber, is simple and convenient for chain transportation, has a long service life, and the equipment has full automation performance.

Description

Technical Field

[0001] The invention relates to a workpiece pre-stamping heating equipment technology, in particular to a heating furnace. Background Art

[0002] Forging is a common process in mechanical processing. In order to achieve certain characteristics, the material needs to be forged to obtain this property. Before forging, the material must be heated at high temperature. For example, the heating of iron materials is usually above 1000 degrees Celsius, even up to 1300 degrees Celsius. The heating furnace is an indispensable processing equipment in forging processing, which is heated by coal combustion, electric power generation or gas combustion.

[0003] For example, a utility model patent with Chinese authorization announcement number CN203541425U discloses a heating furnace, including a mounting plate, a furnace body, the furnace body having a furnace chamber and a material blanking channel, a material guide trough structure being provided in the furnace chamber, the material guide trough structure including a high-temperature section guide trough structure, the high-temperature section guide trough structure having a material guide channel, the material blanking channel being connected to the material guide channel, a temperature measuring hole being provided on the top wall of the furnace chamber for installing a thermometer or for allowing a temperature measuring sensing line to pass through, the temperature measuring hole being vertically aligned with the material guide channel, and the intersection position with the material guide channel is adjacent to the material blanking channel position.

[0004] Another technical solution is proposed below to achieve the above technical effects. Summary of the invention

[0005] The purpose of the present invention is to provide a heating furnace, which adopts an inclined unloading track and is not adjacent to the heating chamber. The chain conveying is simple and convenient, the service life is long, and the equipment has full automation performance.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A heating furnace comprises a heating chamber, which has an inlet and an outlet, a conveying rail arranged along the direction from the inlet to the outlet is arranged inside, and a toggle mechanism for driving the conveying rail to rotate is arranged outside; a lifting device, one side of which is provided with a hopper, and the upper part is provided with a discharge port; a discharge track, which is obliquely arranged between the discharge port and the inlet; and a support plate and a toggle mechanism, wherein the support plate is installed at the inlet of the heating chamber, and the toggle mechanism is installed above the support plate and located at the inclined lower end of the discharge track.

[0008] By adopting the above technical scheme, the lifting device is started, the workpiece is lifted, and then enters the unloading track, and is penetrated into the conveying rail under the drive of the material-shifting mechanism, and enters the interior of the heating chamber from the feeding port of the heating chamber along the conveying rail, and is heated under high temperature conditions and then discharged from the discharging port, wherein the conveying rail can continuously rotate and convey the workpiece under the driving of the shifting mechanism, and finally the workpiece that meets the forging temperature is selected through the screening equipment. The present invention adopts an inclined unloading track, which is not adjacent to the heating chamber, and is simple and convenient for chain conveying, has a long service life, and the equipment has fully automatic performance.

[0009] Preferably, the lifting device includes a vertically arranged frame, a material rail wound on the frame and rotating in a vertical plane, lifting material plates circumferentially arranged on the material rail and arranged at intervals, and a lifting power source for driving the material rail to rotate; the frame has a vertical baffle on one side edge close to the unloading track, and the upper end of the vertical baffle is connected to the inclined upper end of the unloading track; the lifting material plate is inclined toward the vertical baffle and the front end is adjacent to the vertical baffle.

[0010] Preferably, the material hopper is provided with a channel through which a material rail and a lifting plate pass, and a filling block is provided at one end of the frame away from the vertical baffle, the filling block is vertically inserted into the channel, and its side facing away from the frame is adjacent to the inclined upper end of the lifting plate.

[0011] Preferably, the material shifting mechanism includes a transverse cylinder installed on a support plate, the center line of the transverse cylinder is parallel to the length direction of the conveying rail, the piston rod of the transverse cylinder is installed with a push plate, the support plate is installed with a backrest plate, and a unloading station for the workpiece to pass through is formed between the backrest plate and the push plate; the material shifting mechanism also includes a longitudinal cylinder, the longitudinal cylinder is arranged above the conveying rail and perpendicular to the conveying rail; a loading station is formed between the longitudinal cylinder and the backrest plate.

[0012] Preferably, the frame is equipped with a folding plate, and the folding plate is equipped with a proximity switch lever shaft for controlling the on and off of the lifting power source. A detection rod is fixedly connected to the proximity switch lever shaft, and the detection rod is located in the unloading track and has the function of sensing the presence or absence of the workpiece.

[0013] Preferably, the toggle mechanism includes a toggle cylinder rotatably connected to the bottom of the heating chamber, a toggle ring fixedly connected to the piston rod of the toggle cylinder and arranged for rotation, a universal joint arranged between the toggle ring and the piston rod of the toggle cylinder, and a toggle member having one end fixedly connected to the toggle ring and the other end inwardly abutting against the conveying rail.

[0014] Preferably, the toggle member comprises an L-shaped rod fixedly connected to the toggle ring and a toggle lever rotatably connected to the L-shaped rod, the toggle lever pushes the conveying rail, and a buffer spring is provided between the L-shaped rod and the toggle lever.

[0015] Preferably, one end of the conveying rail passes through the discharge port, and the heating chamber is located at the side end of the discharge port and is externally provided with an infrared thermometer, a pushing cylinder and a discharge chute. The emitting light source of the infrared thermometer is aimed at the workpiece on the conveying rail, and the pushing cylinder and the infrared thermometer are connected to a controller through a circuit. The controller can receive the temperature signal to control the movement of the pushing cylinder to achieve a sorting effect. The discharge chute is located on the other side of the conveying rail.

[0016] Preferably, the support plate is provided with bearing seats on both sides of the feed port, support shafts are provided between the bearing seats via bearings, and support rollers are connected to the support shafts; the heating chamber is also provided with bearing seats on both sides of the feed port, another support shaft is provided between the bearing seats via bearings, another support roller is connected to another support shaft, and the conveying rail is sleeved on the outside of the two support rollers and is rotatably matched.

[0017] Preferably, the support shaft and support roller are hollow structures into which coolant can be injected; a protective outer box is provided outside the heating chamber, a cooling mechanism is installed inside the protective outer box, the cooling mechanism includes a cooling box, a cooling pump arranged in the cooling box, a liquid inlet pipe with one end connected to the cooling pump and the other end connected to one end of the support shaft, and a liquid outlet pipe with one end located in the cooling box and the other end connected to the support shaft away from the liquid inlet pipe.

[0018] In summary, compared with the prior art, the present invention also has the following advantages: 1. After the cooling mechanism is set to cool down the support shaft and support roller, the bearing seat and bearing are not easily damaged. If they are frequently damaged and repaired, the conveyor rail and other corresponding components need to be adjusted and debugged, which is time-consuming and labor-intensive. At the same time, after the new bearing is installed, the normal operation of the equipment requires a period of running-in, so the processing efficiency will also be reduced; 2. The proximity switch lever shaft is set to stop the motor from working, and the workpieces accumulate on the unloading track to cause blockage, and even cause squeezing at the end push plate and the backing plate, which is easy to cause loosening and damage of components in the long run, further increasing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the lifting device used to demonstrate the present invention;

[0021] Figure 3 for Figure 2 A magnified view of part A;

[0022] Figure 4 This is a schematic diagram of the connection structure of the lifting device, the material unloading track, the support plate and the material shifting mechanism used in the present invention;

[0023] Figure 5 for Figure 4 A magnified view of part B;

[0024] Figure 6 This is a structural schematic diagram of the present invention for displaying the material shifting mechanism;

[0025] Figure 7 This is a schematic diagram of the structure of the present invention for displaying a heating chamber;

[0026] Figure 8 for Figure 7 Enlarged view of part C;

[0027] Fig. 9 It is a schematic diagram of the structure of the present invention for showing the front side of the protective outer box.

[0028] 1. Protective outer box; 2. Heating chamber; 21. Feeding port; 22. Discharging port; 3. Conveying rail; 4. Driving mechanism; 41. Driving cylinder; 42. Driving ring; 43. L-shaped rod; 44. Driving rod; 441. Wedge-shaped part; 45. Buffer spring; 451. Short rod; 46. Connecting rod; 5. Lifting device; 51. Frame; 511. Feeding port; 512. Lifting plate; 52. Feeding rail; 53. Lifting plate; 54. Vertical baffle; 55. Filling block; 56. Rotating shaft; 57. Gear; 571. Tooth chain; 58. Pulley; 581. Belt; 59. Motor; 6. Support plate; 7. Driving mechanism; 71. Horizontal cylinder; 711. Push plate; 72. Backing plate; 7 21. Unloading station; 722. Loading station; 73. Longitudinal cylinder; 731. Pull plate; 74. Frame rod; 75. Rotating shaft; 76. Counterweight; 77. Horizontal plate; 8. Folding plate; 81. Unloading track; 82. Horizontal buffer section; 83. Limit plate; 9. Proximity switch lever shaft; 91. Detection rod; 10. Infrared thermometer; 11. Push cylinder; 111. Wide plate; 12. Unloading chute; 13. Gas pipe quick connector; 141. Bearing seat; 142. Support shaft; 143. Support roller; 15. Cooling mechanism; 151. Cooling box; 152. Cooling pump; 153. Liquid inlet pipe; 154. Liquid outlet pipe; 16. Material hopper; 161. Passage; 17. Gas gun; 100. Workpiece. DETAILED DESCRIPTION

[0029] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. At the same time, it should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0030] Combination Figure 1 and Figure 2As shown, a heating furnace includes a protective outer box 1, a heating chamber 2 is fixedly installed at the front of the interior, and a lifting device 5 is fixedly installed at the rear of the interior. The lifting device 5 includes a vertically arranged frame 51, a material rail 52 wound on the frame 51 and rotated in a vertical plane through an upper and lower rotating shaft 56, lifting material plates 53 distributed at intervals and arranged in a circle along the track of the material rail 52, and a lifting power source for driving the material rail 52 to rotate.

[0031] The frame 51 is provided with a hopper 16 on one side of the material rail 52. The hopper 16 is provided with a notch. The hopper 16 is fixedly connected to the side wall of the frame 51 on both sides of the notch, and a channel 161 is formed between the notch and the frame 51 for the material rail 52 to pass through. The workpiece 100 is placed in the hopper 16. As the material rail 52 rotates, the workpiece 100 that falls on the lifting plate 53 can be transported upward. Because the lifting plate 53 is only set to a certain length, there is a space between it and the frame 51 and the notch at the bottom of the hopper 16. In order to prevent the workpiece 100 from falling from this space, a filling block 55 is installed (see Figure 3 ). The frame 51 has a vertical baffle plate 54 at one side edge away from the filling block 55 in the width direction, and the upper end of the vertical baffle plate 54 is formed as a material discharge port 511. The lifting plate 53 is inclined toward the vertical baffle plate 54 and the front end is connected to the vertical baffle plate 54. The workpiece 100 is inclined on the lifting plate 53 and the front end is in contact with the vertical baffle plate 54. When the workpiece 100 reaches the material discharge port 511 without being restricted, it is discharged from the material discharge port 511; however, the workpiece 100 that partially falls on the lifting plate 53 perpendicular to the material rail 52 and fails to be discharged smoothly is restricted from the top and falls into the hopper 16 below. In addition, an L-shaped lifting plate 512 can be installed on the side wall of the frame 51 above the vertical baffle plate 54 to block the material, so as to prevent it from being scattered outside the hopper 16.

[0032] Combination Figure 4 and Figure 5 As shown, the lifting power source includes a motor 59 arranged at the rear of the frame 51, a reducer, a pulley 58 and a belt 581 arranged therebetween, and a gear 57 and a toothed chain 571 arranged between the reducer and the rotating shaft 7556. The motor 59 and the reducer can control the material rail 52 to rotate stably at a certain speed.

[0033] In the conveying process of the workpiece 100, the unloading track 81 and the material shifting mechanism 7 are placed behind the lifting device 5, and a folding plate 8 is installed on one side of the frame 51. The folding plate 8 is opened with a hole, and the unloading track 81 is arranged at an angle through the hole. Its inclined upper end is close to the unloading port 511 of the frame 51, and a horizontal buffer section 82 is arranged at the end of the inclined lower end for stabilizing the unloading. A limiting plate 83 is arranged in the unloading track 81 to prevent the workpiece 100 from falling due to squeezing; a vertical plate is installed on the upper part of the folding plate 8, and a proximity switch lever shaft 9 electrically connected to the motor 59 is installed on the vertical plate, and the detection rod 91 of the proximity switch lever shaft 9 is located in the unloading track 81. When the workpiece 100 stored in the unloading track 81 triggers the proximity switch lever shaft 9, the motor 59 stops driving the material track 52 to rotate.

[0034] Combination Figure 1 and Figure 6 As shown, a horizontal support plate 6 is fixed at the inner end of the heating chamber 2, and two bearing seats 141 are fixedly connected to the support plate 6. A support shaft 142 is rotatably connected to the bearing seat 141 through a bearing, and a support roller 143 is coaxially fixed to the support shaft 142. Two vertical support plates 6 are installed on the outside of the protective outer box 1 at the other end of the heating chamber 2 (see Figure 7 ), a bearing seat 141, a support shaft 142 and a support roller 143 are installed at the same time, and the conveying rail 3 is sleeved on the two support rollers 143; the upper part of the conveying rail 3 passes into the heating chamber 2, that is, the upper part enters from the inner end inlet 21 of the heating chamber 2 and comes out from the outer end outlet 22.

[0035] The material-dispensing mechanism 7 is arranged on the inner support plate 6, and mainly includes a transverse cylinder 71, a longitudinal cylinder 73 and a backing plate 72. Four corner support platforms are fixedly connected on both sides of the support roller 143. The longitudinal cylinder 73 is fixedly installed on the inner four corner support platforms, and the piston rod of the longitudinal cylinder 73 is fixedly connected with a pull plate 731. The pull plate 731 is L-shaped. The center lines of the longitudinal cylinder 73 and the pull plate 731 are perpendicular to the conveying rail 3. The longitudinal cylinder 73 drives the pull plate 731 to move to another four corner support platform. At the rear side of this other four corner support platform, the transverse cylinder 71 is suspended by a straight plate, and the piston rod of the transverse cylinder 71 is fixedly connected with a push plate 711. The center lines of the transverse cylinder 71 and the push plate 711 are perpendicular to the conveying rail 3. A rack rod is also arranged on the other four corner support platform. 74, the frame rod 74 is fixedly connected with a horizontal rotating shaft 75, the rotating shaft 75 is located between the push plate 711 and the pull plate 731, and the rotating shaft 75 is rotatably connected with the backing plate 72. In addition, a counterweight block 76 close to the pull plate 731 is arranged on the upper part of the backing plate 72. Under the natural state, the downward trend of the counterweight block 76 drives the backing plate 72 to rotate toward the push plate 711. In the embodiment, a limiting block is installed at the end of the horizontal buffer section 82 of the unloading channel 161 to realize that after the lower end of the backing plate 72 contacts, a unloading station 721 is formed between the backing plate 72 and the push plate 711. In addition, a cross plate 77 is installed at the end of the push plate 711 to limit the workpiece 100 from sliding out of the unloading station 721; and a loading station 722 is formed between the backing plate 72 and the pull plate 731 when the workpiece 100 passes through the backing plate 72.

[0036] Combination Figure 7 and Figure 8 As shown, the toggle mechanism 4 includes a toggle cylinder 41 arranged at the bottom of the heating chamber 2, a toggle ring 42 rotatably connected to the outer support shaft 142, and a toggle member having one end fixedly connected to the toggle ring 42 and the other end inwardly abutting against the conveying rail 3, a connecting rod 46 is fixedly connected below the toggle ring 42, and a piston rod of the toggle cylinder 41 is fixedly connected to the connecting rod 46 by bolts; the toggle member includes an L-shaped rod 43 fixedly connected to the toggle ring 42 and a toggle rod 44 rotatably connected to the L-shaped rod 43, the toggle rod 44 inwardly abuts against the conveying rail 3, and the front end of the toggle rod 44 extends toward the conveying rail 3 and is set in a wedge shape, so that it can be pressed into the conveying rail 3. Between the plates of the conveyor rail 3, short rods 451 are provided on the L-shaped rod 43 and the shift rod 44, and a buffer spring 45 is provided between the two short rods 451; the shifting cylinder 41 pulls the connecting rod 46 backwards to drive the shifting ring 42 to rotate, and the L-shaped rod 43 drives the shift rod 44 to drive the conveyor rail 3 inward to move, and then the shifting cylinder 41 indirectly drives the shift rod 44 to move outward, and the wedge-shaped portion 441 of the shift rod 44 passes through the track plate on the conveyor rail 3 and gradually enters the gap between the next plate. During this period, the buffer spring 45 is stretched and then restored to achieve that the wedge-shaped portion 441 of the shift rod 44 is pressed tightly against the gap between the plates.

[0037] like Fig. 9 As shown, the heating source of this embodiment adopts a gas gun 17 for heating. The gas gun 17 is mounted on the outside of the protective outer box 1 through an adjustable bracket. The nozzle of the gas gun 17 faces the heating chamber 2 to heat it at high temperature. A temperature sensor is also provided at the discharge port 22 of the protective outer box 1. The detection part thereof is located inside the heating chamber 2. A controller is electrically connected between the temperature sensor and the gas gun 17. The controller can be installed under the protective outer box 1. Under different ambient temperatures, it is difficult to obtain a workpiece 100 that meets the surface temperature with the same gas injection power. The power of the gas gun 17 can be automatically adjusted by the temperature sensor and the controller.

[0038] In order to ensure that each workpiece 100 meets the temperature requirements of subsequent mold stamping processing, an infrared thermometer 10, a pushing cylinder 11 and a feeding chute 12 are installed outside the heating chamber 2 at the side end of the discharge port 22. The infrared thermometer 10 and the pushing cylinder 11 are located on one side of the conveying rail 3, and the feeding chute 12 is located on the other side of the conveying rail 3. The emitting light source of the infrared thermometer 10 is aimed at the workpiece 100 on the conveying rail 3 to detect the surface temperature of the workpiece 100. If it meets the processing temperature, the pushing cylinder 11 is controlled by the controller to push the workpiece 100 to the feeding chute 12. In addition, in order to improve efficiency, a widening plate 111 is fixedly connected to the front end of the pushing cylinder 11, which can push two rows of workpieces 100 in the length direction of the conveying rail 3. Because they are heated in the same heating chamber 2, the surface temperatures of the two adjacent rows of workpieces 100 are close, and they can be taken as a whole.

[0039] Combination Figure 1 and Figure 6 As shown, the conveying rail 3 of this embodiment is heated at high temperature, and heat is transferred to the support shaft 142 and the support roller 143, thereby affecting the bearing of the support shaft 142 and the bearing seat 141, so the support shaft 142 and the support roller 143 are made into hollow structures, and a cooling mechanism 15 is installed in the protective outer box 1, the cooling mechanism 15 includes a cooling box 151, a cooling pump 152 arranged in the cooling box 151, a liquid inlet pipe 153 connected to the cooling pump 152 at one end and connected to one end of the support shaft 142 at the other end, and a liquid outlet pipe 154 located in the cooling box 151 at one end and connected to the support shaft 142 at the other end. The liquid inlet pipe 154 is arranged on the support shaft 142 away from the liquid inlet pipe 153. Taking the inner support shaft 142 as an example, the end of the liquid inlet pipe 153 away from the cooling pump 152 is installed in the bearing by an air pipe quick connector 13, and is connected to the support shaft 142.

[0040] The working principle of the embodiment is as follows: start the motor 59, drive the material rail 52 to rotate and drive the workpiece 100 to move upward, and after reaching the unloading port 511, it falls into the unloading station 721 along with the inclined section of the unloading rail 81 and the horizontal buffer section 82 and is restricted by the cross plate 77. If the unloading rail 81 is filled with workpieces 100 and is detected by the proximity switch lever shaft 9, the motor 59 temporarily stops driving the material rail 52 to rotate; the longitudinal cylinder 73 drives the pull plate 731 to move forward to the other four-corner support platform in advance, and forms a loading station 722 between the backing plate 72, and waits for the unloading rail 81 to be filled with workpieces 100. After the workpiece 100 is in position, the horizontal cylinder 71 drives the push plate 711 to push the workpiece 100 into the loading station 722, and the longitudinal cylinder 73 pulls the workpiece 100 onto the conveying rail 3. When the toggle mechanism 4 drives the conveying rail 3 to rotate, the workpiece 100 enters from the inlet 21, is heated at a high temperature in the heating chamber 2, and is discharged from the outlet 22. When the infrared thermometer 10 detects that the workpiece 100 meets the processing temperature, the push cylinder 11 pushes the workpiece 100 into the unloading trough 12, and the screened workpiece 100 falls directly below and can be recovered through the recovery trough.

Claims

1. A heating furnace, characterized in that: include A heating chamber (2) having an inlet (21) and an outlet (22), a conveying rail (3) arranged along the direction from the inlet (21) to the outlet (22) is arranged inside, and a toggle mechanism (4) for driving the conveying rail (3) to rotate is arranged outside; A lifting device (5) is provided with a material hopper (16) on one side and a material discharge port (511) on the upper part; a material discharge track (81) which is arranged obliquely between the material discharge port (511) and the material inlet (21); and A support plate (6) and a material shifting mechanism (7), wherein the support plate (6) is installed at the material inlet (21) of the heating chamber (2), and the material shifting mechanism (7) is installed above the support plate (6) and located at the inclined lower end of the material discharge track (81); the lifting device (5) comprises a vertically arranged frame (51), a material track (52) wound on the frame (51) and rotating in a vertical plane, a lifting material plate (53) circumferentially arranged on the material track (52) and arranged at intervals, and a lifting power source for driving the material track (52) to rotate; a side edge of the frame (51) close to the material discharge track (81) is provided with a vertical baffle (54), and the upper end of the vertical baffle (54) is connected to the inclined upper end of the material discharge track (81). The lifting plate (53) is inclined toward the vertical baffle (54) and its front end is adjacent to the vertical baffle (54); the material hopper (16) is provided with a channel (161) for the material rail (52) and the lifting plate (53) to pass through, and a filling block (55) is provided at one end of the frame (51) away from the vertical baffle (54), the filling block (55) is vertically inserted into the channel (161), and its side facing away from the frame (51) is adjacent to the inclined upper end of the lifting plate (53); the material shifting mechanism (7) comprises a transverse cylinder (71) mounted on the support plate (6), the center line of the transverse cylinder (71) is parallel to the length direction of the conveying rail (3), and the piston rod of the transverse cylinder (71) is installed The support plate (6) has a push plate (711), the support plate (6) is equipped with a backing plate (72), and a material unloading station (721) for the workpiece to pass through is formed between the backing plate (72) and the push plate (711); the material shifting mechanism (7) also includes a longitudinal cylinder (73), and the longitudinal cylinder (73) is arranged above the conveying rail (3) and perpendicular to the conveying rail (3); a material loading station (722) is formed between the longitudinal cylinder (73) and the backing plate (72); the frame (51) is equipped with a folding plate (8), and the folding plate (8) is equipped with a proximity switch lever shaft (9) for controlling the opening and closing of the lifting power source, and the proximity switch lever shaft (9) is fixedly connected with a detection rod (91), and the detection rod (91) is located in the unloading track (81), and the detection rod (91) senses the presence or absence of the workpiece; the support plate (6) is located on both sides of the feed port (21) and is equipped with bearing seats (141), and a support shaft (142) is installed between the bearing seats (141) through bearings, and the toggle mechanism (4) includes a toggle cylinder (41) rotatably connected to the bottom of the heating chamber (2), a toggle ring (42) rotatably connected to the outer support shaft (142), and a toggle member with one end fixedly connected to the toggle ring (42) and the other end inwardly abutting against the conveying track (3); a connecting rod (46) is fixedly connected below the toggle ring (42), and the piston rod of the toggle cylinder (41) is fixedly connected to the connecting rod (46) by bolts;The toggle member comprises an L-shaped rod (43) fixedly connected to the toggle ring (42) and a toggle rod (44) rotatably connected to the L-shaped rod (43), the toggle rod (44) pushes the conveying rail (3), and a buffer spring (45) is provided between the L-shaped rod (43) and the toggle rod (44). ; 2. A heating furnace according to claim 1, characterized in that: One end of the conveying rail (3) passes through the discharge port (22); the heating chamber (2) is located at the side end of the discharge port (22) and is externally provided with an infrared thermometer (10), a material pushing cylinder (11) and a material discharge chute (12); the emitting light source of the infrared thermometer (10) is aimed at the workpiece (100) on the conveying rail (3); the material pushing cylinder (11) and the infrared thermometer (10) are connected to a controller via a circuit; the controller can receive a temperature signal and thus control the movement of the material pushing cylinder (11) to achieve a sorting effect; the material discharge chute (12) is located on one side of the conveying rail (3).

3. A heating furnace according to claim 2, characterized in that: The support shaft (142) is connected to a support roller (143); the heating chamber (2) is also provided with bearing seats (141) on both sides of the discharge port (22); another support shaft (142) is also provided between the bearing seats (141) via bearings; another support roller (143) is connected to the other support shaft (142); the conveying rail (3) is sleeved outside the two support rollers (143) and is rotatably matched.

4. A heating furnace according to claim 3, characterized in that: The support shaft (142) and the support roller (143) are hollow structures into which coolant can be injected; a protective outer box (1) is arranged outside the heating chamber (2), a cooling mechanism (15) is installed inside the protective outer box (1), and the cooling mechanism (15) comprises a cooling box (151), a cooling pump (152) arranged in the cooling box (151), a liquid inlet pipe (153) having one end connected to the cooling pump (152) and the other end connected to one end of the support shaft (142), and a liquid outlet pipe (154) having one end located in the cooling box (151) and the other end connected to the support shaft (142) and away from the liquid inlet pipe (153).

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