Efficient environment-friendly heat treatment furnace and using method thereof

Abstract

The invention relates to the technical field of heat treatment, and provides an efficient and environment-friendly heat treatment furnace and a using method thereof.The efficient and environment-friendly heat treatment furnace comprises a furnace body, an upper furnace cavity, a middle furnace cavity and a lower furnace cavity are sequentially formed in the furnace body from top to bottom, and a supporting mechanism used for containing porcelain plate adobe to be baked is arranged in a bottom cavity of the middle furnace cavity; a wind heating mechanism is arranged above the supporting mechanism, and a driving mechanism for driving the wind heating mechanism to perform rotary heat drying treatment on the porcelain dish adobe on the supporting mechanism is arranged outside the furnace body; the driving mechanism works to drive the wind heating mechanism to rotate above the supporting mechanism, porcelain plate adobe on the supporting mechanism is heated and dried in a rotary mode, the reversing mechanism works to force the wind heating mechanism to drive the supporting mechanism to ascend and rotate in the ascending process, the heating effect of the wind heating mechanism on the supporting mechanism is gradually enhanced when the supporting mechanism ascends, and the porcelain plate adobe is dried. And meanwhile, the rotating speed of the supporting mechanism is gradually reduced, so that the local heating time of the porcelain plate adobe on the supporting mechanism is gradually prolonged.

Description

Technical Field

[0001] The present invention relates to the field of heat treatment technology, and in particular to a high-efficiency and environmentally friendly heat treatment furnace and a method for using the same. Background Art

[0002] In the process of ceramic production, heat treatment needs to be carried out by a heating furnace. Existing heat treatment furnaces for ceramic processing mostly use heating tubes for drying heat treatment. For example, a ceramic material heat treatment device disclosed by announcement number CN221834600U includes: an insulation heat treatment kiln body, a heat treatment heating device is arranged in the insulation heat treatment kiln body, the insulation heat treatment kiln body is installed on the equipment support frame through a kiln body fixing seat, a material conveying device is arranged on the equipment support frame, the material conveying device is connected to the output end of the conveying drive motor through a transmission chain, the housing of the conveying drive motor is installed on the equipment support frame through a motor fixing seat, the heat treatment heating device includes an electric heating tube installation frame, electric heating tube groups are arranged at both ends of the electric heating tube installation frame, and the electric heating tube group is installed on the electric heating tube installation frame through an electric heating tube installation seat. The heat treatment device can realize continuous dynamic heat treatment of ceramic materials, greatly improve the heat treatment efficiency of ceramic materials, and facilitate the connection and coordination between each station.

[0003] However, the existing heat treatment device has the following problems: since the heating power of the electric heating tube is constant, and the height position area of ​​the porcelain adobe does not change much, the temperature of the adobe rises and falls too quickly.

[0004] 1. The effects of rapid temperature rise are: Cracks. Ceramic adobe is a mixture of various mineral raw materials and additives, and contains a certain amount of moisture. When the temperature rises too quickly, the moisture on the surface of the adobe will evaporate quickly. The moisture inside does not have time to diffuse to the surface, which will lead to inconsistent drying speeds on the surface and inside. This difference will cause shrinkage stress on the surface of the adobe. When the stress exceeds the strength limit of the adobe itself, cracks will occur. For example, when making some large ceramic sculpture bodies, if the heating rate is not well controlled during the drying stage, cracks will easily appear on the protruding parts or thinner edge parts of the sculpture; Structural defects: Too fast a temperature rise will cause the organic additives (such as binders, plasticizers, etc.) in the ceramic adobe to decompose violently in a short period of time. These additives usually play an important role in the molding and sintering process of the ceramic body, such as helping the bonding between particles. If they decompose too quickly, the structural uniformity inside the adobe will be destroyed. For example, some binders decompose rapidly at high temperatures, causing the originally tight particle structure of the adobe to become loose, thereby affecting the final strength and density of the ceramic. Deformation. Since the thermal expansion coefficients of different parts of a ceramic adobe may be different, heating too quickly will cause different parts to expand unevenly due to different thermal expansion rates. For example, for a ceramic adobe with complex shapes, such as a slender handle or a part with complex decorative patterns, when the temperature is quickly increased, the thermal expansion degree of these parts and the main part is different, which can easily cause the adobe to deform as a whole, making it impossible to maintain the original design shape; Gas discharge problem: During the firing process of ceramic adobe, the decomposition of organic matter and evaporation of water inside the adobe will produce gas. If the temperature rises too quickly, these gases will be produced in large quantities in a short period of time, and the pore structure of the adobe may not be able to allow the gas to be discharged smoothly. This will cause the gas to accumulate inside the adobe, forming bubbles or causing the adobe to bulge locally, thus affecting the quality and appearance of the ceramic.

[0005] 2. The impact of rapid cooling Cracking. After the ceramic adobe is fired at high temperature, its internal structure is in a state of thermal equilibrium. If the temperature drops too quickly, the outer layer of the adobe will cool and shrink first, while the inside is still at a higher temperature and has not yet begun to shrink or has shrunk to a lesser extent. This inconsistency in shrinkage between the inside and outside will produce a large tensile stress. When the tensile stress exceeds the strength limit of the adobe, it will cause cracking. For example, for some thick-walled ceramic container bodies, rapid cooling after firing is completed can easily cause cracks to appear at the bottom or wall of the container.

[0006] Glass phase cracking. During the firing process of ceramics, some components will form a glass phase, which plays an important role in the density and gloss of ceramics. If the temperature drops too quickly, the glass phase may crack due to the stress generated by the rapid temperature change before it is fully stable. This will cause the ceramic surface to lose its gloss and affect its mechanical properties, such as flexural strength.

[0007] Internal stress is generated. Rapid cooling will cause residual stress inside the ceramic adobe. These internal stresses will cause cracks to expand or further damage to the ceramic when it is subjected to external forces or temperature changes during subsequent use. For example, a ceramic tableware with internal stress may suddenly break after being used in a hot and cold environment several times. Summary of the invention

[0008] The present invention provides a high-efficiency and environmentally friendly heat treatment furnace and a method for using the same, which solves the problem of too fast temperature rise and fall during heat treatment in the prior art.

[0009] The technical scheme of the present invention is as follows: an efficient and environmentally friendly heat treatment furnace, comprising a furnace body, wherein an upper furnace chamber, a middle furnace chamber and a lower furnace chamber are sequentially arranged in the furnace body from top to bottom, a supporting mechanism for placing a ceramic plate adobe to be baked is arranged in the bottom chamber of the middle furnace chamber, a wind heating mechanism is arranged above the supporting mechanism, a driving mechanism for driving the wind heating mechanism to perform a rotational heat baking treatment on the ceramic plate adobe on the supporting mechanism is arranged outside the furnace body, and a reversing mechanism forcing the wind heating mechanism to drive the supporting mechanism to perform a lifting and rotating motion is arranged on one side of the middle furnace chamber; An exhaust port connected to the upper furnace cavity is provided on one side of the top of the furnace body, and an exhaust mechanism for extracting the air in the upper furnace cavity under the synchronous drive of the driving mechanism is arranged in the exhaust port, a second air duct for extracting the air in the middle furnace cavity to the upper furnace cavity is fixed on the other side of the top of the furnace body, a first air duct for extracting the air in the lower furnace cavity to the wind heating mechanism is fixed outside the furnace body on the opposite side of the second air duct, and an air inlet leading to the lower furnace cavity is provided on the furnace body on the opposite side of the first air duct.

[0010] Preferably, the supporting mechanism comprises a threaded rod, the outer side of the threaded rod is threadedly connected to a threaded sleeve, the threaded sleeve is fixedly embedded in the furnace body, a tray is fixed to the top end of the threaded rod, a placement groove is provided on the top surface of the tray, and a friction belt is fixedly embedded on the circumferential surface of the tray.

[0011] Preferably, the wind heating mechanism includes a guide roller, a first wind hood is fixed to one end of the guide roller, a second wind hood is fixed to the other end of the guide roller, a plurality of evenly distributed air holes are opened on opposite sides of the first wind hood and the second wind hood, a first heating tube is provided on the outer side of the guide roller, a second heating tube is provided on the inner side of the first wind hood, a tube shaft is fixed to the outer side surfaces of the first wind hood and the second wind hood, a protrusion is provided on the outer surface of the tube shaft, a shaft sleeve is slidably connected to the outside of the tube shaft through the protrusion, the shaft sleeve is rotatably arranged on the furnace body, a driven gear is fixed to the outside of the shaft sleeve close to the first wind hood, and a rotating ring is rotatably connected to the outside of the tube shaft close to the second wind hood.

[0012] Preferably, the driving mechanism comprises a motor, the motor is fixed outside the furnace body, a driving shaft is fixed to the output end of the motor, the driving shaft extends into the middle furnace cavity and is fixed with a driving gear meshing with a driven gear.

[0013] Preferably, the reversing mechanism includes a bracket and a cylinder, the bracket is fixed to one side of the cavity wall of the middle furnace cavity, the bracket is rotatably connected to a U-shaped seat via a rotating shaft, a push rod is fixed to the bottom of the U-shaped seat, the end of the cylinder is hinged to the bracket, and the output end of the cylinder is hinged to the push rod.

[0014] Preferably, slide grooves are provided on both sides of the U-shaped seat, and sliders are slidably connected in the slide grooves, and limiting shafts rotatably connected to the sliders are fixed on both sides of the rotating ring.

[0015] Preferably, the first heating tube is spirally arranged along the length direction of the guide roller, and the second heating tube is spirally arranged in the first air cover in a plum blossom shape.

[0016] Preferably, stainless steel grids are fixed inside the air outlet and the air inlet.

[0017] Preferably, the exhaust mechanism includes a driven shaft, which is rotatably connected to a stainless steel grid of the exhaust port, a fan blade is fixed to one end of the driven shaft facing the upper furnace cavity, the other end of the driven shaft extends outside the furnace body and is fixed with a first pulley, a second pulley is fixed outside the driving shaft, and the first pulley and the second pulley are connected by a transmission belt.

[0018] Based on the above-mentioned high-efficiency and environmentally friendly heat treatment furnace, the present invention also proposes a method for using the heat treatment furnace, comprising the following steps: Step 1: Place the ceramic plate blanks to be baked on the supporting mechanism, place the ceramic plate blanks to be processed in the upper furnace cavity, and place the ceramic plates that have been processed in the lower furnace cavity; Step 2: The driving mechanism drives the wind heating mechanism to rotate above the supporting mechanism, so as to perform rotary heating and drying on the porcelain plate blank on the supporting mechanism; Step 3: The reversing mechanism works to force the wind-heating mechanism to drive the supporting mechanism to rise, and rotate during the rising process. When the supporting mechanism rises, the heating effect of the wind-heating mechanism gradually increases, and at the same time, the rotation rate of the supporting mechanism gradually slows down, so that the local heating time of the porcelain plate adobe on the supporting mechanism gradually increases; In step four, the exhaust mechanism, under the synchronous driving of the reversing mechanism, draws the hot air in the middle furnace cavity to the upper furnace cavity through the second air duct, so as to preheat the ceramic plate adobe to be processed in the upper furnace cavity, and draws the hot air in the lower furnace cavity to the wind heating mechanism through the first air duct, so as to cool down the ceramic plate adobe that has completed the heat treatment in the lower furnace cavity.

[0019] The beneficial effects of the present invention are: In the present invention, the driving mechanism drives the wind-heating mechanism to rotate above the supporting mechanism, and the porcelain plate adobe on the supporting mechanism is heated and dried in a rotary manner. The reversing mechanism forces the wind-heating mechanism to drive the supporting mechanism to rise, and rotate during the rising process. When the supporting mechanism rises, the heating effect of the wind-heating mechanism gradually increases, and at the same time, the rotation rate of the supporting mechanism gradually slows down, so that the local heating time of the porcelain plate adobe on the supporting mechanism gradually increases; In the present invention, the exhaust mechanism is driven synchronously by the reversing mechanism to pump the hot air in the middle furnace cavity into the upper furnace cavity through the second air duct, so as to preheat the porcelain plate adobe to be processed later in the upper furnace cavity, and pump the hot air in the lower furnace cavity to the wind heating mechanism through the first air duct, so as to cool down the porcelain plate adobe that has completed the heat treatment in the lower furnace cavity. Compared with the prior art, the present invention can play the role of preheating recovery to quickly complete the heat treatment and cooling, and has the promotion significance of high efficiency and environmental protection. At the end of the heat treatment, the present invention turns off the power supply and heating of the first heating tube and the second heating tube, and utilizes the residual heat of the first heating tube and the second heating tube to heat the porcelain plate adobe. At the same time, the second wind cover is switched through the reversing mechanism to contact the friction belt arranged around the plate surface and the tray. The friction between the second wind cover and the friction belt causes the tray to gradually descend with the porcelain plate adobe. As the height of the tray decreases, the density of the second heating tubes near the height area where the porcelain plate adobe is located gradually decreases, and the residual heat of the first heating tube and the second heating tube is reduced. At the same time, since the angular velocity of the first wind cover during rotation is constant, the linear velocity of the tray due to friction rotation gradually increases when the tray rises, that is, the rotation speed of the porcelain plate adobe on the tray gradually increases, and the local heating time of the porcelain plate adobe gradually shortens, so that the porcelain plate adobe is gradually cooled down at the end of the heat treatment to avoid cooling down too quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of a high-efficiency and environmentally friendly heat treatment furnace proposed by the present invention; Figure 2 This is a schematic diagram of the front view structure of a high-efficiency and environmentally friendly heat treatment furnace proposed by the present invention; Figure 3 This is a schematic diagram of the wind heating mechanism, driving mechanism, exhaust mechanism and reversing mechanism proposed in the present invention; Figure 4 This is a schematic structural diagram of the wind heating mechanism, driving mechanism, exhaust mechanism and reversing mechanism proposed in the present invention from another perspective; Figure 5 This is a schematic diagram of the side cross-sectional structure of the wind heating mechanism proposed by the present invention; Figure 6 This is a schematic diagram of the forward cross-sectional structure of the wind heating mechanism proposed by the present invention; Figure 7 This is a schematic diagram of the structure of the reversing mechanism proposed by the present invention; Figure 8 This is a schematic diagram of the forward cross-sectional structure of the supporting mechanism proposed by the present invention; Fig. 9 for Figure 3 The enlarged structural diagram at A in the middle; In the figure: 1. furnace body; 11. upper furnace cavity; 12. middle furnace cavity; 13. lower furnace cavity; 14. exhaust port; 15. air inlet; 2. supporting mechanism; 21. threaded rod; 22. threaded sleeve; 23. tray; 24. placement slot; 25. friction belt; 3. wind heating mechanism; 31. guide roller; 32. first wind hood; 33. second wind hood; 34. first heating tube; 35. tube shaft; 36. shaft sleeve; 37. rotating ring; 38. driven gear; 39. Second heating tube; 310. Limiting shaft; 311. Sliding block; 4. Driving mechanism; 41. Motor; 42. Driving shaft; 43. Driving gear; 5. Exhaust mechanism; 51. Driven shaft; 52. Fan blades; 53. First pulley; 54. Second pulley; 55. Transmission belt; 6. First air duct; 7. Second air duct; 8. Reversing mechanism; 81. Bracket; 82. U-shaped seat; 83. Push rod; 84. Cylinder; 85. Rotating shaft. DETAILED DESCRIPTION

[0022] The following will be combined with 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.

[0023] See also Figure 1 and Figure 2 The present invention provides a technical solution: a high-efficiency and environmentally friendly heat treatment furnace, comprising a furnace body 1, wherein an upper furnace chamber 11, a middle furnace chamber 12 and a lower furnace chamber 13 are sequentially arranged in the furnace body 1 from top to bottom, a holding mechanism 2 for placing a ceramic plate adobe to be baked is arranged in the bottom chamber of the middle furnace chamber 12, a wind heating mechanism 3 is arranged above the holding mechanism 2, a driving mechanism 4 for driving the wind heating mechanism 3 to perform a rotational heat baking treatment on the ceramic plate adobe on the holding mechanism 2 is arranged outside the furnace body 1, and a reversing mechanism for forcing the wind heating mechanism 3 to drive the holding mechanism 2 to perform a lifting and rotating motion is arranged on one side of the middle furnace chamber 12 Mechanism 8, an exhaust port 14 communicating with the upper furnace cavity 11 is provided on one side of the top of the furnace body 1, and an exhaust mechanism 5 is arranged in the exhaust port 14 for extracting the air in the upper furnace cavity 11 under the synchronous drive of the driving mechanism 4, a second air duct 7 for extracting the air in the middle furnace cavity 12 to the upper furnace cavity 11 is fixed on the other side of the top of the furnace body 1, a first air duct 6 for extracting the air in the lower furnace cavity 13 to the wind heating mechanism 3 is fixed outside the furnace body 1 on the opposite side of the second air duct 7, and an air inlet 15 leading to the lower furnace cavity 13 is provided on the furnace body 1 on the opposite side of the first air duct 6.

[0024] See also Figure 8The supporting mechanism 2 includes a threaded rod 21, the outer side of the threaded rod 21 is threadedly connected with a threaded sleeve 22, the threaded sleeve 22 is fixedly embedded in the furnace body 1, a tray 23 is fixed at the top of the threaded rod 21, a placement groove 24 is provided on the top surface of the tray 23, and a friction belt 25 is fixedly embedded on the circumferential surface of the tray 23.

[0025] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 The wind heating mechanism 3 includes a guide roller 31, a first wind hood 32 is fixed to one end of the guide roller 31, a second wind hood 33 is fixed to the other end of the guide roller 31, a plurality of evenly distributed air holes are opened on opposite sides of the first wind hood 32 and the second wind hood 33, a first heating tube 34 is provided on the outer side of the guide roller 31, a second heating tube 39 is provided on the inner side of the first wind hood 32, a tube shaft 35 is fixed to the outer side surfaces of the first wind hood 32 and the second wind hood 33, a protrusion is provided on the outer surface of the tube shaft 35, a shaft sleeve 36 is slidably connected to the outside of the tube shaft 35 through the protrusion, the shaft sleeve 36 is rotatably arranged on the furnace body 1, a driven gear 38 is fixed to the outside of the shaft sleeve 36 close to the first wind hood 32, and a rotating ring 37 is rotatably connected to the outside of the tube shaft 35 close to the second wind hood 33.

[0026] See also Figure 3 and Figure 4 The driving mechanism 4 includes a motor 41, which is fixed outside the furnace body 1. A driving shaft 42 is fixed to the output end of the motor 41. The driving shaft 42 extends into the middle furnace cavity 12 and is fixed with a driving gear 43 meshing with the driven gear 38. The motor 41 drives the driving shaft 42 to rotate at a uniform speed, and the driving gear 43 on the driving shaft 42 and the driven gear 38 on the shaft sleeve 36 are meshed to drive the guide roller 31 and the first wind hood 32 and the second wind hood 33 at both ends of the guide roller 31 to rotate, and then the first heating tube 34 outside the guide roller 31 is used to heat the porcelain plate adobe from above, and the second heating tube 39 in the first wind hood 32 is used to heat the porcelain plate adobe from the side.

[0027] See also Figure 7 and Fig. 9The reversing mechanism 8 includes a bracket 81 and a cylinder 84. The bracket 81 is fixed to one side of the cavity wall of the middle furnace cavity 12. The bracket 81 is rotatably connected to a U-shaped seat 82 through a rotating shaft 85. A push rod 83 is fixed to the bottom of the U-shaped seat 82. The end of the cylinder 84 is hinged to the bracket 81. The output end of the cylinder 84 is hinged to the push rod 83. Slide grooves are provided on both sides of the U-shaped seat 82, and a slider 311 is slidably connected in the slide groove. Limiting shafts 310 rotatably connected to the slider 311 are fixed on both sides of the rotating ring 37. During the heating process, the push rod 83 and the U-shaped seat 82 on the top of the push rod 83 are driven to rotate clockwise around the rotating shaft 85 through the operation of the cylinder 84, so that When the slide groove of the U-shaped seat 82 is limited by the sliding of the slider 311 in the slide groove, the tube shaft 35 is pushed by the rotating ring 37 to make the first air hood 32 move to the right until the disk surface of the first air hood 32 conflicts with the friction belt 25 circumferentially arranged on the tray 23. The friction between the first air hood 32 and the friction belt 25 makes the placement groove 24 rotate spirally with the threaded rod 21, so that the tray 23 gradually rises while holding the porcelain plate adobe. Conversely, the second air hood 33 is switched by the reversing mechanism 8 to conflict with the disk surface and the friction belt 25 circumferentially arranged on the tray 23. The friction between the second air hood 33 and the friction belt 25 makes the tray 23 gradually descend while holding the porcelain plate adobe.

[0028] It should be noted that the first heating tube 34 is spirally arranged along the length direction of the guide roller 31 , and the second heating tube 39 is spirally arranged in the first air cover 32 in a plum blossom shape.

[0029] See also Figure 1 and Figure 3 The exhaust port 14 and the air inlet 15 are both fixed with stainless steel grids, and the exhaust mechanism 5 includes a driven shaft 51, which is rotatably connected to the stainless steel grid of the exhaust port 14, and a fan blade 52 is fixed to one end of the driven shaft 51 facing the upper furnace chamber 11, and the other end of the driven shaft 51 extends to the outside of the furnace body 1 and is fixed with a first pulley 53, and a second pulley 54 is fixed outside the driving shaft 42, and the first pulley 53 and the second pulley 54 are connected by a transmission belt 55, and the driving shaft 42 rotates to drive the second pulley 54 synchronously The transmission belt 55 drives the first pulley 53, and the fan blades 52 on the driven shaft 51 work to extract the air in the upper furnace cavity 11, and the hot air in the middle furnace cavity 12 is guided along the tube axis 35 to the shaft sleeve 36 through the air holes on the disk of the second wind hood 33, and then is drawn into the upper furnace cavity 11 by the second air duct 7, and the air in the lower furnace cavity 13 can be guided to the first wind hood 32 through the first air duct 6, and then blown into the middle furnace cavity 12 after being heated by the second heating tube 39 in the first wind hood 32.

[0030] A method for using a heat treatment furnace comprises the following steps: Step 1: Place the ceramic plate blanks to be baked on the supporting mechanism 2, place the ceramic plate blanks to be processed in the upper furnace chamber 11, and place the ceramic plates that have been processed in the lower furnace chamber 13; Step 2: The driving mechanism 4 drives the wind heating mechanism 3 to rotate above the supporting mechanism 2, and the ceramic plate adobe on the supporting mechanism 2 is heated and dried in a rotary manner; Step 3: The reversing mechanism 8 works to force the wind-heating mechanism 3 to drive the supporting mechanism 2 to rise, and rotate during the rising process. When the supporting mechanism 2 rises, the heating effect of the wind-heating mechanism 3 gradually increases, and at the same time, the rotation rate of the supporting mechanism 2 gradually slows down, so that the local heating time of the porcelain plate adobe on the supporting mechanism 2 gradually increases; In step four, the exhaust mechanism 5, under the synchronous driving of the reversing mechanism 8, draws the hot air in the middle furnace chamber 12 to the upper furnace chamber 11 through the second air duct 7, so as to preheat the ceramic plate adobe to be processed later in the upper furnace chamber 11, and draws the hot air in the lower furnace chamber 13 to the wind heating mechanism 3 through the first air duct 6, so as to cool down the ceramic plate adobe that has completed the heat treatment in the lower furnace chamber 13.

[0031] The working principle and use process of the present invention are as follows: In the initial state, the position of the supporting mechanism 2 is as follows: Figure 2 As shown, after the ceramic plate blank to be baked is placed in the placement groove 24 of the tray 23, the motor 41 can be used to drive the driving shaft 42 to rotate at a constant speed, and the driving gear 43 on the driving shaft 42 and the driven gear 38 on the shaft sleeve 36 are engaged to drive the guide roller 31 and the first wind cover 32 and the second wind cover 33 at both ends of the guide roller 31 to rotate, and then the ceramic plate blank is heated from the top through the first heating tube 34 outside the guide roller 31, and the ceramic plate blank is heated from the side through the second heating tube 39 in the first wind cover 32; During the heating process, the cylinder 84 drives the push rod 83 and the U-shaped seat 82 on the top of the push rod 83 to rotate clockwise around the rotating shaft 85, so that the slide groove of the U-shaped seat 82 is limited to the sliding position of the slider 311 in the slide groove, and the tube shaft 35 is pushed by the rotating ring 37 to move the first air cover 32 to the right until the disk surface of the first air cover 32 conflicts with the friction belt 25 arranged circumferentially on the tray 23. The friction between the first air cover 32 and the friction belt 25 causes the placement groove 24 to rotate with the threaded rod 21, so that the tray 23 holds the porcelain plate adobe and gradually rises. Since the second heating tube 39 is arranged in a plum blossom shape in the first wind cover 32, as the height of the tray 23 increases, the density of the second heating tube 39 near the height area where the porcelain plate adobe is located gradually increases. At the same time, since the angular velocity of the first wind cover 32 is constant during rotation, the linear velocity of the tray 23 gradually decreases due to friction when it rises, that is, the rotation speed of the porcelain plate adobe on the tray 23 gradually slows down, and the local heating time of the porcelain plate adobe gradually increases, thereby preventing the porcelain plate adobe from heating up too quickly during heat treatment; On the contrary, at the end of the heat treatment, the power supply of the first heating tube 34 and the second heating tube 39 is turned off, and the residual heat of the first heating tube 34 and the second heating tube 39 is used to heat the ceramic plate adobe. At the same time, the second wind cover 33 is switched by the reversing mechanism 8 to contact the friction belt 25 arranged circumferentially between the plate surface and the tray 23. The friction between the second wind cover 33 and the friction belt 25 causes the tray 23 to gradually descend while holding the ceramic plate adobe. As the height of the tray 23 decreases, the density of the second heating tubes 39 near the height area where the ceramic plate adobe is located gradually decreases, and the residual heat of the first heating tube 34 and the second heating tube 39 is reduced. At the same time, since the angular velocity of the first wind cover 32 during rotation is constant, the linear velocity of the tray 23 due to friction rotation gradually increases when the tray 23 rises, that is, the rotation speed of the ceramic plate adobe on the tray 23 gradually increases, and the local heating time of the ceramic plate adobe gradually shortens, so that the ceramic plate adobe gradually cools down at the end of the heat treatment to avoid excessive cooling. During the above-mentioned heat treatment process, the rotation of the active shaft 42 drives the second pulley 54 to rotate synchronously, and the transmission action of the transmission belt 55 can drive the first pulley 53, and then the fan blades 52 on the driven shaft 51 work to extract the air in the upper furnace cavity 11, and the hot air in the middle furnace cavity 12 is guided along the pipe shaft 35 to the sleeve 36 through the air holes on the disk of the second wind hood 33, and then pumped into the upper furnace cavity 11 by the second air duct 7, and the hot air discharged from the upper furnace cavity 11 is used to preheat the ceramic plate adobe to be processed later, and the air in the lower furnace cavity 13 can be guided to the first wind hood 32 through the first air duct 6, and then blown into the middle furnace cavity 12 after being heated by the second heating tube 39 in the first wind hood 32. On the one hand, the waste heat of the air in the lower furnace cavity 13 can be recovered, and on the other hand, the ceramic plate after heat treatment in the lower furnace cavity 13 can be cooled down.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-efficiency and environmentally friendly heat treatment furnace, comprising a furnace body (1), characterized in that: The furnace body (1) is provided with an upper furnace chamber (11), a middle furnace chamber (12) and a lower furnace chamber (13) in order from top to bottom; a supporting mechanism (2) for placing a ceramic plate blank to be baked is provided in the bottom chamber of the middle furnace chamber (12); a wind heating mechanism (3) is provided above the supporting mechanism (2); a driving mechanism (4) is provided outside the furnace body (1) for driving the wind heating mechanism (3) to perform a rotational heat baking treatment on the ceramic plate blank on the supporting mechanism (2); and a reversing mechanism (8) for forcing the wind heating mechanism (3) to drive the supporting mechanism (2) to perform a lifting and rotating motion is provided on one side of the middle furnace chamber (12); An exhaust port (14) communicating with the upper furnace cavity (11) is provided on one side of the top of the furnace body (1), and an exhaust mechanism (5) for extracting air from the upper furnace cavity (11) under synchronous drive of the driving mechanism (4) is arranged in the exhaust port (14); a second air duct (7) for extracting air from the middle furnace cavity (12) to the upper furnace cavity (11) is fixed on the other side of the top of the furnace body (1); a first air duct (6) for extracting air from the lower furnace cavity (13) to the wind heating mechanism (3) is fixed outside the furnace body (1) on the opposite side of the second air duct (7); an air inlet (15) leading to the lower furnace cavity (13) is provided on the furnace body (1) on the opposite side of the first air duct (6).

2. The high-efficiency and environmentally friendly heat treatment furnace according to claim 1, characterized in that: The supporting mechanism (2) comprises a threaded rod (21), the outer side of the threaded rod (21) being threadedly connected to a threaded sleeve (22), the threaded sleeve (22) being fixedly embedded in the furnace body (1), a tray (23) being fixedly disposed at the top end of the threaded rod (21), a placement groove (24) being disposed on the top surface of the tray (23), and a friction belt (25) being fixedly embedded on the circumferential surface of the tray (23).

3. The high-efficiency and environmentally friendly heat treatment furnace according to claim 1, characterized in that: The wind heating mechanism (3) comprises a guide roller (31), a first wind hood (32) being fixed to one end of the guide roller (31), a second wind hood (33) being fixed to the other end of the guide roller (31), a plurality of evenly distributed air holes being provided on opposite sides of the first wind hood (32) and the second wind hood (33), a first heating tube (34) being provided on the outer side of the guide roller (31), a second heating tube (39) being provided on the inner side of the first wind hood (32), a tube shaft (35) being fixed to the outer side surfaces of the first wind hood (32) and the second wind hood (33), a protrusion being provided on the outer surface of the tube shaft (35), a shaft sleeve (36) being slidably connected to the outer side of the tube shaft (35) via the protrusion, the shaft sleeve (36) being rotatably arranged on the furnace body (1), a driven gear (38) being fixed to the outer side of the shaft sleeve (36) close to the first wind hood (32), and a rotating ring (37) being rotatably connected to the outer side of the tube shaft (35) close to the second wind hood (33).

4. The high-efficiency and environmentally friendly heat treatment furnace according to claim 3, characterized in that: The driving mechanism (4) comprises a motor (41), the motor (41) being fixed outside the furnace body (1), a driving shaft (42) being fixed to the output end of the motor (41), the driving shaft (42) extending into the middle furnace cavity (12) and being fixed with a driving gear (43) meshing with a driven gear (38).

5. The high-efficiency and environmentally friendly heat treatment furnace according to claim 3, characterized in that: The reversing mechanism (8) comprises a bracket (81) and a cylinder (84); the bracket (81) is fixed to one side of a cavity wall of the middle furnace cavity (12); a U-shaped seat (82) is rotatably connected to the bracket (81) via a rotating shaft (85); a push rod (83) is fixed to the bottom of the U-shaped seat (82); the end of the cylinder (84) is hinged to the bracket (81); and the output end of the cylinder (84) is hinged to the push rod (83).

6. The high-efficiency and environmentally friendly heat treatment furnace according to claim 5, characterized in that: Slide grooves are provided on both sides of the U-shaped seat (82), and sliders (311) are slidably connected in the slide grooves. Limiting shafts (310) rotatably connected to the sliders (311) are fixed on both sides of the rotating ring (37).

7. The high-efficiency and environmentally friendly heat treatment furnace according to claim 3, characterized in that: The first heating tube (34) is spirally arranged along the length direction of the guide roller (31), and the second heating tube (39) is spirally arranged in the first wind cover (32) in a plum blossom shape.

8. The high-efficiency and environmentally friendly heat treatment furnace according to claim 4, characterized in that: Stainless steel grids are fixed inside the air outlet (14) and the air inlet (15).

9. The high-efficiency and environmentally friendly heat treatment furnace according to claim 8, characterized in that: The exhaust mechanism (5) comprises a driven shaft (51), the driven shaft (51) being rotatably connected to a stainless steel grid of an exhaust port (14), a fan blade (52) being fixed to one end of the driven shaft (51) facing the upper furnace cavity (11), the other end of the driven shaft (51) extending outside the furnace body (1) and being fixed to a first pulley (53), a second pulley (54) being fixed outside the driving shaft (42), and the first pulley (53) and the second pulley (54) being connected in transmission via a transmission belt (55).

10. A method for using a heat treatment furnace, according to the high-efficiency and environmentally friendly heat treatment furnace of claim 1, characterized in that: The following steps are involved: Step 1: Place the ceramic plate blanks to be baked on the supporting mechanism (2), place the ceramic plate blanks to be processed in the upper furnace chamber (11), and place the ceramic plates that have been processed in the lower furnace chamber (13); Step 2: The driving mechanism (4) drives the wind heating mechanism (3) to rotate above the supporting mechanism (2), thereby performing rotary heating and drying on the ceramic plate blank on the supporting mechanism (2); Step 3: The reversing mechanism (8) works to force the wind-heating mechanism (3) to drive the supporting mechanism (2) to rise, and the supporting mechanism (2) rotates during the rising process. When the supporting mechanism (2) rises, the heating effect of the wind-heating mechanism (3) gradually increases, and at the same time, the rotation rate of the supporting mechanism (2) gradually slows down, so that the local heating time of the porcelain plate adobe on the supporting mechanism (2) gradually increases; In step 4, the exhaust mechanism (5) is driven synchronously with the reversing mechanism (8) to pump the hot air in the middle furnace chamber (12) into the upper furnace chamber (11) through the second air duct (7), so as to preheat the ceramic plate blanks to be processed in the upper furnace chamber (11), and pump the hot air in the lower furnace chamber (13) to the wind heating mechanism (3) through the first air duct (6), so as to cool the ceramic plate blanks that have completed the heat treatment in the lower furnace chamber (13).

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