Vacuum heat treatment furnace gas cooling control device

Abstract

The present application belongs to the technical field of auxiliary control device of heat treatment furnace, and discloses a kind of vacuum heat treatment furnace gas cooling control device, including heat treatment furnace body, the inside bottom surface of heat treatment furnace body is equipped with transmission cavity, rotation is arranged between the inner wall of transmission cavity and has rotary table, the bottom of rotary table is slidably engaged on the side wall of transmission cavity, the outer surface of rotary table is close to the gap between the inner wall of transmission cavity, the present application, workpiece is heated to certain temperature, will trigger feedback component to work, feedback component works will transmission component cut off, make rotary table stop rotating, simultaneously, nitrogen that the cap of air inlet pipe is guided to the inside of heat treatment furnace body is blown to the outer surface of workpiece after heating, so that the outer surface of workpiece can nitriding treatment, and feedback component works can also be guided to filter gas component, so that nitrogen after blowing workpiece is filtered and discharged after passing through filter gas component, prevent carrying dust pollution workshop internal air.

Description

Technical Field

[0001] This invention relates to the technical field of auxiliary control devices for heat treatment furnaces, and more particularly to a gas-cooling control device for a vacuum heat treatment furnace. Background Technology

[0002] Vacuum heat treatment is a comprehensive technology that combines vacuum technology and heat treatment. It refers to the entire or part of the heat treatment process being carried out under vacuum. Vacuum heat treatment furnaces have high thermal efficiency, can achieve rapid heating and cooling, and have functions such as degreasing and degassing, thereby achieving a bright and clean surface effect.

[0003] Currently, after placing an object inside a vacuum heat treatment furnace and heating it to a certain temperature, the object needs to be removed for nitriding. However, because the object's temperature is high after heating, an oxide layer is easily formed after removal, resulting in a shallow nitriding layer. Furthermore, temperature fluctuations cannot be controlled after the object is removed, and the nitriding effect deteriorates when the temperature is low, affecting the processing quality. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a gas cooling control device for a vacuum heat treatment furnace.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum heat treatment furnace gas cooling control device, comprising a heat treatment furnace body, a transmission cavity is formed on the inner bottom surface of the heat treatment furnace body, a turntable is rotatably arranged between the inner walls of the transmission cavity, the bottom of the turntable is slidably engaged with the side wall of the transmission cavity, a gap is left between the outer surface of the turntable near the top and the inner wall of the transmission cavity, the top of the turntable extends into the interior of the heat treatment furnace body, a feedback component is arranged inside the turntable, an inner cavity is formed at the bottom of the turntable, a transmission component is arranged inside the inner cavity, a flared opening is formed on one outer surface of the heat treatment furnace body, and a gas filtering component is arranged inside the flared opening;

[0006] A sealed protective door is provided on the front side of the heat treatment furnace body. An air inlet cap is installed on the top of the heat treatment furnace body near a corner on the front side. An annular gas coil tube is fixed on the inner top surface of the heat treatment furnace body near the inner wall edge.

[0007] Preferably, the outer surface of the annular air ring tube is equidistantly connected with multiple nozzles along the circumferential direction, and the bottom of the air inlet cap has two guide holes, one end of each of the two guide holes being connected to the interior of the annular air ring tube and located on both sides of the interior of the annular air ring tube.

[0008] Preferably, the air filtration assembly includes a rotating shaft, and a filter plate is provided between the inner walls of the flared opening and the outer surface near the heat treatment furnace body. One end of the rotating shaft is rotatably connected to one side of the filter plate at the middle position. Two scrapers are fixed on the outer surface of the rotating shaft, and one side of the outer surface of each of the two scrapers is in contact with one side of the outer surface of the filter plate.

[0009] Preferably, an air passage is provided at the middle of the inner bottom surface of the horn-shaped opening, the air passage extends into the interior of the heat treatment furnace body, the other end of the rotating shaft extends into the air passage, and multiple vortex blades are fixed at equal intervals along the circumferential direction on the outer surface of the rotating shaft near the edge of the other end.

[0010] Preferably, the transmission assembly includes a double-sided concave column located inside the inner cavity. Side openings are provided on both sides of the inner wall near the top edge of the inner cavity. One end of each side opening extends to the outside of the turntable. A connecting rod is provided between the two sides of the inner wall near the bottom edge of the two side openings. One end of each connecting rod is fixed to the outer surface of the double-sided concave column.

[0011] Preferably, a thin wire spring is fixed between the top of the double-sided concave column and the inner top surface of the cavity, an annular inner retaining ring is fitted on the outer surface of the turntable, one end of each of the two connecting rods slides into the inner annular retaining ring, and multiple spring paddles are fixed at equal intervals along the circumferential direction at the bottom of the double-sided concave column.

[0012] Preferably, a servo motor is fixed at the bottom of the heat treatment furnace body, the output end of the servo motor slides through into the transmission cavity, a drive block is fixed at the output end of the servo motor, and multiple wedge-shaped openings are equidistantly provided on the top of the drive block along the circumferential direction, and the bottom ends of the multiple spring paddles are correspondingly engaged inside the wedge-shaped openings.

[0013] Preferably, the feedback component includes two bimetallic strips, a heat-conducting plate is provided at the top center of the turntable, a heat-insulating pad ring is fixed to the top of the turntable outside the heat-conducting plate, fan-shaped storage openings are provided on both outer surfaces of the turntable, storage cavities are provided inside the turntable near the two side edges, one end of each of the two storage cavities extends to the outer surface of the heat-conducting plate, a heat-conducting block is provided inside each of the two storage cavities near one end, and one side of each of the two heat-conducting blocks is fixed to the heat-conducting plate.

[0014] Preferably, one end of each of the two bimetallic strips is fixed to the outer surface of the heat-conducting block, and the other end of each of the two bimetallic strips is fixed with a push plate. One end of each of the two push plates slides through into the inside of the fan-shaped receiving port and is fixed with the arc-shaped plate. The interior of the heat treatment furnace body is provided with slides that penetrate into the transmission cavity near both sides, and the top of each of the two slides is provided with a reciprocating groove.

[0015] Preferably, both slides are connected to the guide holes, one of the slides is connected to the through-hole, and guide plates are slidably arranged inside both slides. The tops of both guide plates are bent and extended into the reciprocating groove. A tension spring is fixed between the tops of both guide plates and the inner top surface of the reciprocating groove. The tops of both guide plates extend into the transmission cavity and are fixed to the top of the annular inner retaining ring. A through hole is opened in the middle on one side of both guide plates, and a bevel is opened near the bottom edge on one side of both guide plates. Both bevels are located on one side of the arc plate, and a through-hole is opened above the bevel on one side of one of the guide plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, when the workpiece is heated to a certain temperature, the feedback component is triggered to work. When the feedback component works, it cuts off the transmission component, causing the turntable to stop rotating. At the same time, the nitrogen introduced by the air inlet cap is directed into the heat treatment furnace body to blow on the outer surface of the heated workpiece, so that the outer surface of the workpiece can be nitrided. In addition, when the feedback component works, it can also open the filter component, so that the nitrogen blown on the workpiece is filtered through the filter component and discharged, preventing the dust carried by it from polluting the air inside the workshop.

[0018] 2. When the air filter assembly is working, the airflow enters the inside of the horn mouth from the through-hole and impacts the vortex blades, generating a lateral thrust on the vortex blades, which in turn drives the vortex blades and the rotating shaft to rotate. When the rotating shaft rotates, it drives the scraper to scrape along the filter surface of the filter plate, scraping off the filtered dust.

[0019] 3. When the transmission component of the present invention is working, the rotation of the servo motor can drive the drive block to rotate. Since the wedge-shaped opening at the top of the drive block and the spring pawl at the bottom of the double-sided concave column are engaged with each other, the rotation of the drive block can drive the double-sided concave column to rotate. Furthermore, the connecting rods on both sides of the double-sided concave column slide between the inner walls of the two sides of the side opening, so they can synchronously drive the turntable to rotate, causing the workpiece on the turntable to rotate together with the turntable.

[0020] 4. When the feedback component of this invention is working, the bimetallic strip is heated and bent and deformed, which drives the push plate to push the arc plate to the outside of the fan-shaped storage opening. When the arc plate slides to the outside of the fan-shaped storage opening, as the turntable rotates, when one end of the arc plate rotates to contact the bottom inclined opening of the guide plate, it will push the guide plate upward under the action of the inclined surface. When the guide plate is pushed upward, it will drive the inner ring to slide upward. At this time, the connecting rod and the double concave column will slide upward synchronously with the inner ring. When the double concave column slides upward, the spring plate at the bottom slides out from the inside of the wedge-shaped opening, releasing the limit between it and the wedge-shaped opening. Attached Figure Description

[0021] Figure 1 This invention provides a side-view three-dimensional structural schematic diagram of a vacuum heat treatment furnace gas cooling control device;

[0022] Figure 2 This invention provides a bottom-view three-dimensional structural diagram of a vacuum heat treatment furnace gas cooling control device;

[0023] Figure 3 This invention provides a cross-sectional three-dimensional structural schematic diagram of a vacuum heat treatment furnace gas cooling control device;

[0024] Figure 4 This invention provides a partial cross-sectional three-dimensional structural schematic diagram of a vacuum heat treatment furnace gas cooling control device;

[0025] Figure 5 This invention provides a cross-sectional three-dimensional structural diagram of the turntable in the gas cooling control device of a vacuum heat treatment furnace;

[0026] Figure 6 This invention provides a top-view three-dimensional structural diagram of the annular inner retaining ring, double-sided concave column, and drive block in a vacuum heat treatment furnace gas cooling control device;

[0027] Figure 7 This invention provides a cross-sectional three-dimensional structural diagram of an annular inner retaining ring, a double-sided concave column, and a drive block in a vacuum heat treatment furnace gas cooling control device.

[0028] Figure 8 This invention provides a top-view three-dimensional structural diagram of the heat-conducting plate, arc plate, and bimetallic strip in a vacuum heat treatment furnace gas cooling control device.

[0029] Figure 9 For the present invention Figure 4 A magnified view of a portion of point A in the middle;

[0030] Figure 10 For the present invention Figure 4 A magnified view of a portion of point B in the middle.

[0031] In the diagram: 1. Heat treatment furnace body; 2. Sealed protective door; 3. Air inlet cap; 4. Filter plate; 5. Servo motor; 6. Annular air ring tube; 7. Nozzle; 8. Transmission chamber; 9. Turntable; 10. Heat insulation gasket ring; 11. Heat conduction plate; 12. Reciprocating groove; 13. Tension spring; 14. Slide rail; 15. Guide plate; 16. Guide hole; 17. Through hole; 18. Fan-shaped receiving port; 19. Arc-shaped plate; 20. Receiving chamber ; 21. Push plate; 22. Bimetallic strip; 23. Heat-conducting block; 24. Annular inner retaining ring; 25. Side opening; 26. Connecting rod; 27. Inner cavity; 28. Fine wire spring; 29. ​​Double-sided concave column; 30. Drive block; 31. Wedge-shaped opening; 32. Spring lever; 33. Air passage; 34. Through port; 35. Through port; 36. Slanted opening; 37. Trumpet mouth; 38. Rotating shaft; 39. Scraper; 40. Vortex blade. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-10 The present invention provides a technical solution: a vacuum heat treatment furnace gas cooling control device, including a heat treatment furnace body 1, a transmission cavity 8 is provided on the inner bottom surface of the heat treatment furnace body 1, a turntable 9 is rotatably arranged between the inner walls of the transmission cavity 8, the bottom of the turntable 9 is slidably engaged with the side wall of the transmission cavity 8, a gap is left between the outer surface of the turntable 9 near the top and the inner wall of the transmission cavity 8, the top of the turntable 9 extends into the interior of the heat treatment furnace body 1, a feedback component is provided inside the turntable 9, an inner cavity 27 is provided at the bottom of the turntable 9, a transmission component is provided inside the inner cavity 27, a flared mouth 37 is provided on one outer surface of the heat treatment furnace body 1, and a gas filtering component is provided inside the flared mouth 37.

[0034] A sealed protective door 2 is provided on the front side of the heat treatment furnace body 1. An air inlet cap 3 is installed on the top of the heat treatment furnace body 1 near a corner on the front side. An annular gas ring tube 6 is fixed on the inner top surface of the heat treatment furnace body 1 near the inner wall edge. Multiple nozzles 7 are fixedly connected at equal intervals along the circumference on the outer surface of the annular gas ring tube 6. Two guide holes 16 are opened at the bottom of the air inlet cap 3. One end of each guide hole 16 is connected to the interior of the annular gas ring tube 6 and is located on both sides inside the annular gas ring tube 6.

[0035] The effect achieved is as follows: the air inlet cap 3 is connected to the external nitrogen supply pipeline, and the workpiece is placed on top of the turntable 9 inside the heat treatment furnace body 1 for heating. The transmission component can drive the turntable 9 to rotate, so that the workpiece is heated more evenly. When the workpiece is heated to a certain temperature, the feedback component will be triggered to work. When the feedback component works, it cuts off the transmission component, so that the turntable 9 stops rotating. At the same time, the nitrogen introduced by the air inlet cap 3 is circulated into the heat treatment furnace body 1 to blow on the outer surface of the heated workpiece, so that the outer surface of the workpiece can be nitrided. In addition, when the feedback component works, it can also open the filter component, so that the nitrogen blown on the workpiece is filtered through the filter component and discharged, preventing the dust carried by it from polluting the air inside the workshop.

[0036] like Figure 1 , Figure 4 and Figure 9 As shown, the air filtration assembly includes a rotating shaft 38. A filter plate 4 is disposed between the inner wall of the flared mouth 37 and the outer surface of the heat treatment furnace body 1. One end of the rotating shaft 38 is rotatably connected to one side of the filter plate 4 at the middle position. Two scrapers 39 are fixed on the outer surface of the rotating shaft 38. One side of the outer surface of the two scrapers 39 is in contact with one side of the outer surface of the filter plate 4. An air passage 33 is opened in the middle of the inner bottom surface of the flared mouth 37. The air passage 33 extends into the interior of the heat treatment furnace body 1. The other end of the rotating shaft 38 extends into the interior of the air passage 33. Multiple vortex blades 40 are fixed at equal intervals along the circumferential direction on the outer surface of the rotating shaft 38 near the edge of the other end.

[0037] The effect achieved is that the nitrogen gas blown over the workpiece inside the heat treatment furnace body 1 enters the flared mouth 37 through the through-hole 34, and then is discharged after being filtered by the filter plate 4. When the airflow enters the flared mouth 37 from the through-hole 34, it will impact the vortex blades 40, generating a lateral thrust on the vortex blades 40, which in turn can drive the vortex blades 40 and the rotating shaft 38 to rotate. When the rotating shaft 38 rotates, it will drive the scraper 39 to scrape along the filter surface of the filter plate 4, scraping off the filtered dust.

[0038] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the transmission assembly includes a double-sided concave column 29 located inside the inner cavity 27. Side openings 25 are provided on both sides of the inner wall of the inner cavity 27 near the top edge. One end of each side opening 25 extends to the outside of the turntable 9. Connecting rods 26 are provided between the two sides of the inner wall of each side opening 25 near the bottom edge. One end of each connecting rod 26 is fixed to the outer surface of the double-sided concave column 29. A thin wire spring 28 is fixed between the top of the double-sided concave column 29 and the inner top surface of the inner cavity 27. The outer surface of the turntable 9 is fitted with... There is an annular inner retaining ring 24, and one end of each of the two connecting rods 26 slides into the annular inner retaining ring 24. The bottom of the double-sided concave column 29 is fixed with multiple spring paddles 32 at equal intervals along the circumferential direction. The bottom of the heat treatment furnace body 1 is fixed with a servo motor 5. The output end of the servo motor 5 slides through into the transmission cavity 8. The output end of the servo motor 5 is fixed with a drive block 30. The top of the drive block 30 is provided with multiple wedge-shaped openings 31 at equal intervals along the circumferential direction. The bottom ends of the multiple spring paddles 32 are respectively engaged inside the wedge-shaped openings 31.

[0039] The effect achieved is that the rotation of the servo motor 5 can drive the drive block 30 to rotate. Since the wedge-shaped opening 31 at the top of the drive block 30 and the spring pawl 32 at the bottom of the double-sided concave column 29 are engaged with each other, the rotation of the drive block 30 can drive the double-sided concave column 29 to rotate. Furthermore, the connecting rods 26 on both sides of the double-sided concave column 29 slide between the inner walls of the side opening 25, so they can synchronously drive the turntable 9 to rotate, causing the workpiece on the turntable 9 to rotate together with the turntable 9.

[0040] like Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, the feedback component includes two bimetallic strips 22. A heat-conducting plate 11 is located at the center of the top of the turntable 9. A heat-insulating pad ring 10 is fixed to the outside of the heat-conducting plate 11 on the top of the turntable 9. Fan-shaped storage openings 18 are provided on both outer surfaces of the turntable 9. Storage cavities 20 are provided inside the turntable 9 near the edges of both sides. One end of each storage cavity 20 extends through to the outer surface of the heat-conducting plate 11. A heat-conducting block 23 is provided inside each storage cavity 20 near one end. One side of each heat-conducting block 23 is fixed to the heat-conducting plate 11. One end of each of the two bimetallic strips 22 is fixed to the outer surface of the heat-conducting block 23. A push plate 21 is fixed to the other end of each of the two bimetallic strips 22. One end of each push plate 21 slides through into the fan-shaped storage opening 18 and is fixed to the arc-shaped plate 19. The heat treatment furnace body 1 has storage openings near both sides of the interior. The slide 14 extends into the transmission cavity 8. The top of each slide 14 is provided with a reciprocating groove 12. Both slides 14 are connected to the guide hole 16. One of the slides 14 is connected to the through opening 34. Guide plates 15 are slidably arranged inside both slides 14. The top of both guide plates 15 is bent and extends into the reciprocating groove 12. A tension spring 13 is fixed between the top of both guide plates 15 and the top surface of the reciprocating groove 12. The top of both guide plates 15 extends into the transmission cavity 8 and is fixed to the top of the annular inner retaining ring 24. A through hole 17 is provided in the middle of one side of each guide plate 15. An oblique opening 36 is provided near the bottom edge of one side of each guide plate 15. The oblique openings 36 are located on one side of the arc plate 19. An opening 35 is provided above the oblique opening 36 on one side of one guide plate 15.

[0041] The effect achieved is that when the workpiece is heated to a certain temperature inside the heat treatment furnace body 1, the temperature on the workpiece is transferred to the heat-conducting plate 11, and then to the bimetallic strip 22 through the heat-conducting block 23. The bimetallic strip 22 is bent and deformed by the heat, which drives the push plate 21 to push the arc plate 19 to the outside of the fan-shaped receiving opening 18. When the arc plate 19 slides to the outside of the fan-shaped receiving opening 18, as the turntable 9 rotates, when one end of the arc plate 19 rotates to contact the bottom inclined opening 36 of the guide plate 15, it will push the guide plate 15 upward under the action of the inclined surface. When the guide plate 15 is pushed upward, it will drive the annular inner retaining ring 24 to slide upward. At this time, the connecting rod 26 and the double-sided concave column 29 will slide upward synchronously with the annular inner retaining ring 24. When the double-sided concave column 29 slides upward, the spring pawl 32 located at the bottom slides out from the inside of the wedge-shaped opening 31, releasing the limit between it and the wedge-shaped opening 31. Therefore, when the servo motor 5 drives the drive block 30 to rotate, The double-sided concave column 29 cannot continue to rotate, so the turntable 9 is in a stopped state. After the guide plate 15 slides upward, the through hole 17 slides to the position where it communicates with the guide hole 16, so that the guide hole 16 is open. The through port 35 slides to the through port 34, so that the through port 34 is open. So at this time, the nitrogen introduced by the air inlet cap 3 can enter the interior of the annular gas ring tube 6 through the guide hole 16, and then be sprayed from the nozzle 7 onto the outer surface of the workpiece inside the heat treatment furnace body 1. The gas inside the heat treatment furnace body 1 flows into the bell mouth 37 from the through port 34 after passing the outer surface of the workpiece. In actual use, the bimetallic strip 22 is a composite material composed of two metals or other materials with suitable properties. Since the thermal expansion coefficients of each component layer are different, when the temperature changes, the deformation of the active layer is greater than that of the passive layer. As a result, the entire bimetallic strip 22 will bend towards the passive layer side. The curvature of this composite material changes, thus producing deformation.

[0042] Working principle: When using this device, connect the air inlet cap 3 to the external nitrogen supply pipe, place the workpiece on top of the turntable 9 inside the heat treatment furnace body 1 for heating, and the rotation of the servo motor 5 drives the drive block 30 to rotate. Since the wedge-shaped opening 31 at the top of the drive block 30 engages with the spring plate 32 at the bottom of the double-sided concave column 29, the rotation of the drive block 30 drives the double-sided concave column 29 to rotate. Furthermore, the connecting rods 26 on both sides of the double-sided concave column 29 slide between the inner walls of the side opening 25, thus synchronously driving the turntable 9 to rotate, causing the workpiece on the turntable 9 to rotate together with the turntable 9. When the workpiece is heated to a certain temperature inside the heat treatment furnace body 1, the temperature on the workpiece is transferred to the heat-conducting plate 11, and then to the bimetallic strip 22 through the heat-conducting block 23. The bimetallic strip 22 is bent and deformed by the heat, which drives the push plate 21 to push the arc plate 19 to the outside of the fan-shaped receiving opening 18. When the arc plate 19 slides to the outside of the fan-shaped receiving opening 18, as the turntable 9 rotates, when one end of the arc plate 19 rotates to contact the bottom inclined opening 36 of the guide plate 15, it will push the guide plate 15 upward under the action of the inclined surface. When the guide plate 15 is pushed upward, it will drive the annular inner retaining ring 24 to slide upward. At this time, the connecting rod 26 and the double-sided concave column 29 will slide upward synchronously with the annular inner retaining ring 24. When the double-sided concave column 29 slides upward, the spring pawl 32 at the bottom slides out from the inside of the wedge-shaped opening 31, releasing the limit between it and the wedge-shaped opening 31. Therefore, when the servo motor 5 drives the drive block 30 to rotate, it cannot continue to drive the double-sided concave column 29 to rotate. So the turntable 9 is in a stopped state at this time. After the guide plate 15 slides upward, the through hole 17 slides to the position where it communicates with the guide hole 16, making the guide hole 16 open. The through port 35 slides to the through port 34, making the through port 34 open. So at this time, the intake pipe cap 3 is introduced. Nitrogen gas can enter the interior of the annular gas tube 6 through the guide hole 16, and then be sprayed from the nozzle 7 onto the outer surface of the workpiece inside the heat treatment furnace body 1. The gas inside the heat treatment furnace body 1 flows into the flared mouth 37 through the through-hole 34 after passing the outer surface of the workpiece, and then is discharged after being filtered by the filter plate 4. When the airflow enters the interior of the flared mouth 37 through the through-hole 34, it will impact the vortex blades 40, generating a lateral thrust on the vortex blades 40, which can drive the vortex blades 40 and the rotating shaft 38 to rotate. When the rotating shaft 38 rotates, it will drive the scraper 39 to scrape along the filter surface of the filter plate 4, scraping off the filtered dust.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas cooling control device for a vacuum heat treatment furnace, characterized in that, The furnace includes a heat treatment furnace body (1), a transmission cavity (8) is provided on the bottom surface of the heat treatment furnace body (1), a turntable (9) is rotatably arranged between the inner walls of the transmission cavity (8), the bottom of the turntable (9) is slidably engaged with the side wall of the transmission cavity (8), a gap is left between the outer surface of the turntable (9) near the top and the inner wall of the transmission cavity (8), the top of the turntable (9) extends into the interior of the heat treatment furnace body (1), a feedback component is provided inside the turntable (9), an inner cavity (27) is provided at the bottom of the turntable (9), a transmission component is provided inside the inner cavity (27), a flared mouth (37) is provided on one side of the outer surface of the heat treatment furnace body (1), and a gas filter component is provided inside the flared mouth (37). A sealed protective door (2) is provided on the front side of the heat treatment furnace body (1). An air inlet cap (3) is installed on the top of the heat treatment furnace body (1) near a corner on the front side. An annular gas ring tube (6) is fixed on the inner top surface of the heat treatment furnace body (1) near the inner wall edge. The transmission assembly includes a double-sided concave column (29). The double-sided concave column (29) is located inside the inner cavity (27). Side openings (25) are provided on both sides of the inner wall of the inner cavity (27) near the top edge. One end of each of the two side openings (25) extends to the outside of the turntable (9). A connecting rod (26) is provided between the two sides of the inner wall of the two side openings (25) near the bottom edge. One end of each of the two connecting rods (26) is fixed on the outer surface of the double-sided concave column (29). A thin wire spring (28) is fixed between the top of the column (29) and the inner top surface of the inner cavity (27). An annular inner retaining ring (24) is fitted on the outer surface of the turntable (9). One end of each of the two connecting rods (26) slides into the inner annular retaining ring (24). Multiple spring paddles (32) are fixed at equal intervals along the circumferential direction at the bottom of the double-sided concave column (29). A servo motor (5) is fixed at the bottom of the heat treatment furnace body (1). The output end of the servo motor (5) slides through into the transmission cavity (8). A drive block (30) is fixed at the output end of the servo motor (5). Multiple wedge-shaped openings (31) are opened at equal intervals along the circumferential direction at the top of the drive block (30). The bottom ends of the multiple spring paddles (32) are correspondingly engaged in the wedge-shaped openings (31). The feedback component includes two bimetallic strips (22). A heat-conducting plate (11) is provided at the top center of the turntable (9). A heat-insulating pad ring (10) is fixed on the outside of the heat-conducting plate (11) at the top of the turntable (9). Fan-shaped storage openings (18) are provided on both outer surfaces of the turntable (9). Storage cavities (20) are provided inside the turntable (9) near the two side edges. One end of each of the two storage cavities (20) extends through to the outer surface of the heat-conducting plate (11). The interior of the heat treatment furnace body (1) is provided with heat-conducting blocks (23) near one end. One side of each of the two heat-conducting blocks (23) is fixed on the heat-conducting plate (11). One end of each of the two bimetallic strips (22) is fixed on the outer surface of the heat-conducting blocks (23). The other end of each of the two bimetallic strips (22) is fixed with a push plate (21). One end of each of the two push plates (21) slides through into the fan-shaped receiving opening (18) and is fixed to the arc-shaped plate (19). The interior of the heat treatment furnace body (1) is provided with a through-hole opening near both sides. The transmission cavity (8) contains two slides (14), each with a reciprocating groove (12) at its top. Both slides (14) are connected to the guide hole (16). One slide (14) is connected to the through opening (34). Guide plates (15) are slidably installed inside both slides (14). The tops of both guide plates (15) are bent and extended into the reciprocating groove (12). The tops of the two guide plates (15) are flush with the top surface of the reciprocating groove (12). A tension spring (13) is fixed between each of the two guide plates (15). The tops of the two guide plates (15) extend into the transmission cavity (8) and are fixed to the top of the annular inner retainer (24). A through hole (17) is opened on one side of each of the two guide plates (15) at the middle. A bevel (36) is opened on one side of each of the two guide plates (15) near the bottom edge. The two bevels (36) are located on one side of the arc plate (19). A through opening (35) is opened on one side of one of the guide plates (15) above the bevel (36).

2. The gas cooling control device for a vacuum heat treatment furnace according to claim 1, characterized in that: The outer surface of the annular air ring tube (6) is fixedly connected with multiple nozzles (7) at equal intervals along the circumferential direction. The bottom of the air inlet cap (3) has two guide holes (16). One end of each guide hole (16) is connected to the interior of the annular air ring tube (6) and is located on both sides of the interior of the annular air ring tube (6).

3. The gas cooling control device for a vacuum heat treatment furnace according to claim 2, characterized in that: The air filtration assembly includes a rotating shaft (38). A filter plate (4) is provided on the outer surface of the heat treatment furnace body (1) between the inner walls of the bell mouth (37). One end of the rotating shaft (38) is rotatably connected to one side of the filter plate (4) at the middle. Two scrapers (39) are fixed on the outer surface of the rotating shaft (38). The outer surfaces of the two scrapers (39) are respectively attached to one side of the outer surface of the filter plate (4).

4. The gas cooling control device for a vacuum heat treatment furnace according to claim 3, characterized in that: The bottom surface of the flared mouth (37) is provided with an air passage (33) in the middle. The air passage (33) extends into the interior of the heat treatment furnace body (1). The other end of the rotating shaft (38) extends into the air passage (33). Multiple vortex blades (40) are fixed at equal intervals along the circumferential direction on the outer surface of the rotating shaft (38) near the edge of the other end.

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