A heat treatment furnace, its bearing system and its furnace door lifting system

Abstract

The present application discloses a heat treatment furnace, its supporting system and its furnace door lifting system, and relates to the technical field of heat treatment equipment. The present application optimizes and improves the structure of the heat treatment furnace in the prior art, adopts a lifting furnace door, and arranges conveyor belts inside and outside the furnace. When it is necessary to load and unload workpieces into and out of the furnace, the deformation or displacement of one of the two conveyor belts is first controlled so that the two conveyor belts are butted together, and then the workpieces on the conveyor belts are transferred; the technical effects of simple and convenient loading and unloading of workpieces into the heat treatment furnace, good continuity of heat treatment of workpieces and high overall automation level of production are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment equipment, and in particular to a heat treatment furnace, a bearing system thereof, and a furnace door lifting system thereof. Background Art

[0002] Closed heat treatment furnaces are widely used due to their low energy consumption (less heat loss, more energy-saving and environmentally friendly) and good high-temperature stability (they can maintain the set temperature range in the furnace for a long time with little fluctuation).

[0003] In the prior art, a closed heat treatment furnace includes a carrying system for carrying workpieces and a furnace door lifting system for opening and closing the heat treatment furnace; the general structure of the carrying system is a carrying trolley; before heat treatment, the workpieces need to be placed one by one on the carrying trolley, and then the furnace door is opened and pushed into the heat treatment furnace for treatment. After the heat treatment is completed, the workpieces are pulled out of the carrying trolley and the workpieces that have completed the heat treatment are removed one by one.

[0004] Although the above scheme can effectively complete the heat treatment of workpieces, the carrying system is limited by its own structure. A furnace of workpieces needs the support of one or more carrying trolleys to flexibly enter and exit the heat treatment furnace (the area on the top of the carrying trolley cannot load the workpieces, the distance between the side of the carrying trolley and the side wall of the heat treatment furnace, and the distance between the carrying trolleys are large. If the workpieces are directly placed into the heat treatment furnace, more workpieces can be processed at the same time), resulting in low space utilization in the heat treatment furnace; and when using a carrying trolley, the workpieces are loaded onto and unloaded from the carrying trolley one by one. The entire loading and unloading process is cumbersome and complicated, and cannot be matched with the use of a conveyor belt, resulting in poor production continuity and low degree of automation; the workpieces loaded on the carrying trolley cannot be moved after entering the heat treatment furnace, and the workpieces at different positions are at different distances from the heat source in the furnace, resulting in relatively poor heating uniformity of the workpieces.

[0005] Therefore, there is a need for a heat treatment furnace that saves energy, has simple and convenient workpiece loading and unloading, good production continuity, and a high level of automation. Summary of the Invention

[0006] The embodiment of the present application solves the technical problems in the prior art of the heat treatment furnace, which is limited by its own structure and leads to complicated workpiece loading and unloading processes, poor production continuity, and low automation level. It achieves the technical effects of simple and convenient loading and unloading of workpieces in the heat treatment furnace, good continuity of workpiece heat treatment, and high overall automation level of production.

[0007] The embodiment of the present application provides a heat treatment furnace, comprising a furnace chamber, a carrying system, and a furnace door lifting system; the furnace chamber is a horizontal furnace body, and its workpiece inlet and outlet are located at one end of itself; the furnace door lifting system is positioned at the workpiece inlet and outlet of the furnace chamber;

[0008] The load-bearing system includes an internal load-bearing component and an external conveying component;

[0009] The number of the internal load-bearing assembly and the external conveying assembly is one, and the main bodies of the two are conveyor belt structures with the same top surface height. The former is positioned inside the furnace bin; the external conveying assembly is positioned outside the furnace bin, close to the workpiece inlet and outlet of the furnace bin, and its length direction is the same as that of the internal load-bearing assembly;

[0010] The inner load-bearing component and / or the external conveying component can be docked together at the workpiece inlet and outlet through displacement and / or deformation while retaining the conveying function, thereby enabling the workpiece to be transferred between the inner load-bearing component and the external conveying component.

[0011] Preferably, the inner bearing assembly and / or the outer conveying assembly is a conveyor belt structure with a straight guide rail at the bottom, and when workpieces on the two need to be transferred, the two or one of the two are controlled to slide and then dock together.

[0012] Preferably, the inner load-bearing component and / or the external conveying component are length-adjustable devices for dynamic material conveying, and when workpieces on the two need to be transferred, the two or one of the two is controlled to deform and extend to dock together.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] By optimizing and improving the structure of the heat treatment furnace in the prior art, a lifting furnace door is adopted, and conveyor belts are arranged inside and outside the furnace. When it is necessary to load and unload workpieces into and out of the furnace, the deformation or displacement of one of the two conveyor belts is first controlled so that the two conveyor belts are butted together, and then the workpieces on the conveyor belts are transferred. This effectively solves the technical problems of the prior art heat treatment furnace, which is limited by its own structure and results in a cumbersome and complicated workpiece loading and unloading process, poor production continuity, and low automation level. This further achieves the technical effects of simple and convenient loading and unloading of workpieces into the heat treatment furnace, good continuity of workpiece heat treatment, and a high overall automation level in production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance and structure of the heat treatment furnace in this application;

[0016] Figure 2 This is a schematic diagram of the structure of the heat treatment furnace for this application;

[0017] Figure 3 This is a schematic diagram of the heat treatment furnace in this application with the furnace door open;

[0018] Figure 4 This is a schematic diagram of the appearance structure of the load-bearing system;

[0019] Figure 5 It is a simplified structural diagram of the load-bearing system;

[0020] Figure 6 Schematic diagram of the positional relationship of the components of the load-bearing system;

[0021] Figure 7 It is a structural diagram of the shift bearing assembly;

[0022] Figure 8 It is a simplified structural diagram of the shift bearing assembly;

[0023] Figure 9 Schematic diagram of the positional relationship between the first belt and the second belt;

[0024] Figure 10 A schematic diagram of the positional relationship of the components of the carrying system with the first belt and the second belt;

[0025] Figure 11 This is a schematic diagram of the appearance and structure of the conveyor turntable assembly;

[0026] Figure 12 Schematic diagram of the bottom structure of the conveyor turntable assembly.

[0027] In the picture:

[0028] Furnace bin 100, conveyor belt body 210, first belt 211, second belt 212, bottom drive wheel 220, top load roller 230, end guide roller 240, longitudinal placement rod 241, placement notch 242, bottom guide wheel 250, sliding roller body 260, sliding guide rail 271, sliding block 272, pulling rope 273, force storage tension spring 274, rope reversing wheel 275, placement column 276, bottom telescopic rod 281, load column 282 , rotating disk 283, walking groove 284, horizontal guide block 285, bottom lifting rod 286, bottom horizontal block 310, insertion groove 311, closing bolt 312, guide roller 313, side guide plate 320, furnace door 330, lifting assembly 340, horizontal load rod 350, rotating closing plate 360, plate fixing assembly 361, external conveying assembly 400, shifting guide rail 510, shifting car 520, rotating hook 530. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0030] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1

[0033] like Figure 1 and Figure 2 As shown, the heat treatment furnace of the present application includes a furnace chamber 100, a carrying system, a furnace door lifting system, a power component and a control unit.

[0034] The furnace chamber 100 is a horizontal furnace body with a heating element inside. The workpiece inlet and outlet are located at one end of the furnace chamber, and there is only one workpiece inlet and outlet.

[0035] The furnace door lifting system is positioned at the workpiece entrance and exit of the furnace bin 100, and lifts or lowers the furnace door during operation to open and close the furnace bin 100;

[0036] The carrying system includes an internal carrying component and an external conveying component 400;

[0037] There is one inner carrying assembly and one external conveying assembly 400, both of which are conveyor belt structures with the same top surface height. The former is positioned inside the furnace bin 100 and is used to carry workpieces during the heat treatment process; the external conveying assembly 400 is positioned outside the furnace bin 100, close to the workpiece inlet and outlet of the furnace bin 100, and has the same length direction as the inner carrying assembly, and is used to transport workpieces.

[0038] The inner load-bearing component and / or the external conveying component 400 can be docked together at the workpiece inlet and outlet through displacement and / or deformation while retaining the conveying function, thereby enabling the workpiece to be transferred between the inner load-bearing component and the external conveying component 400.

[0039] The power assembly is used to provide power for the operation of the various components of the heat treatment furnace of this application, and the control unit plays a role in controlling the coordinated operation of the various components of the heat treatment furnace. Both are existing technologies and will not be described in detail here.

[0040] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0041] Furthermore, the inner load-bearing component and / or the external conveying component 400 is a conveyor belt structure with a straight guide rail at the bottom. When the workpieces on the two need to be transferred, the two or one of them are controlled to slide and then dock together (so that the distance between the two is less than 5 mm).

[0042] Furthermore, the inner load-bearing component and / or the external conveying component 400 is a material dynamic conveying length adjustable device (i.e., a conveyor belt with adjustable length), and when it is necessary to transfer the workpieces on the two, the two or one of them is controlled to deform and extend to dock together.

[0043] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0044] The invention solves the technical problems in the prior art of the heat treatment furnace, such as the complicated workpiece loading and unloading process, poor production continuity and low automation level caused by the limitation of its own structure; and achieves the technical effects of simple and convenient workpiece loading and unloading in the heat treatment furnace, good continuity of workpiece heat treatment and high overall automation level of production.

[0045] Example 2

[0046] The heat treatment furnace of the present application includes a furnace bin 100, a carrying system, a furnace door lifting system, a power assembly, and a control unit, and also includes a dragging and shifting assembly for assisting the deformation of the carrying system by dragging (if there is no dragging and shifting assembly, manual dragging is required);

[0047] like Figures 1 to 8 As shown, the carrying system includes an inner carrying component and an outer conveying component 400;

[0048] The number of the internal load-bearing assembly and the external conveying assembly 400 is the same, and the top surfaces of the two are the same height. The former is positioned inside the furnace bin 100 and is used to carry the workpiece during the heat treatment process; the external conveying assembly 400 is positioned outside the furnace bin 100 and is a conveyor belt structure positioned on the ground. It is arranged near the workpiece inlet and outlet of the furnace bin 100 and has the same length direction as the length direction of the internal load-bearing assembly, and is used to transport the workpiece.

[0049] The inner bearing assembly includes a conveyor belt body 210, a top load roller 230, a front support belt assembly, a longitudinal placement rod 241 and a rear support belt assembly;

[0050] The conveyor belt body 210 is an annular belt body woven from steel wires, arranged horizontally, with its length direction being the same as the length direction of the furnace bin 100, and is sleeved on the front support belt assembly and the rear support belt assembly, always contacting the front support belt assembly and the rear support belt assembly and being supported by the front support belt assembly and the rear support belt assembly to always be in a straight state; the top surface of the conveyor belt body 210 is normally in a horizontal state;

[0051] There are multiple top-loading rollers 230, which are horizontally arranged in a row along the length direction of the furnace bin 100, with the length direction being perpendicular to the length direction of the furnace bin 100. The top-loading rollers 230 are connected to the inner side wall of the furnace bin 100 or are positioned on the inner bottom of the furnace bin 100 through supporting objects such as support rods, support plates, and support frames. The top-loading rollers 230 are used to support the conveyor belt 210 placed thereon, thereby reducing sagging of the conveyor belt 210 placed thereon due to deflection. The inner side surface of the conveyor belt 210 closest to the top surface always contacts the top-loading rollers 230.

[0052] The front support belt assembly is arranged near the end of the furnace bin 100 away from the workpiece inlet and outlet. It is a horizontally arranged reversing roller, with its axial direction perpendicular to the length direction of the conveyor belt body 210. It rotates around its own axis and is connected to the inner side wall of the furnace bin 100 or is positioned on the inner bottom of the furnace bin 100 through supporting objects such as support rods, support plates, and support frames;

[0053] The longitudinal placement rods 241 are rigid vertical rods, the bottom of which is fixed to the inner bottom of the furnace bin 100 and is provided near the workpiece inlet and outlet. There are two of them, one near each of the two inner side walls of the furnace bin 100.

[0054] A placement notch 242 for positioning the rear support belt assembly is provided on the side wall of the longitudinal placement rod 241 near the top. The placement notch 242 is arc-shaped and opens toward the workpiece inlet and outlet.

[0055] The rear support belt assembly is used to support the conveyor belt body 210 and control the extension and contraction of the conveyor belt body 210, and includes a bottom drive wheel 220, an end guide roller 240, a bottom guide wheel 250, a sliding roller body 260, and a shift support assembly; the axial directions of the bottom drive wheel 220, the end guide roller 240, the bottom guide wheel 250, and the sliding roller body 260 are all the same as the axial direction of the top load roller 230;

[0056] The bottom driving wheel 220 is horizontally arranged and positioned on the inner bottom near the middle of the furnace bin 100. It is a cylindrical wheel driven by a motor and rotates under the control of the control unit to drive the conveyor belt body 210 to rotate.

[0057] The end guide roller 240 is a rod-shaped roller, comprising an inner core shaft and an outer rotating tube; the inner core shaft is a hard rod body; the outer rotating tube is a hard tube body, which is mounted on the inner core shaft and rotates around the axis of the inner core shaft; the two ends of the inner core shaft are exposed and normally fit into the placement notch 242; after installation, the two ends of the inner core shaft protrude longitudinal placement rods 241 to facilitate dragging the shift assembly to position it;

[0058] The bottom guide wheel 250 is a rod-shaped roller that rotates around its own axis and is connected to the inner wall of the furnace bin 100 or positioned on the inner bottom of the furnace bin 100 through a support such as a support rod, a support plate, or a support frame. It is located on the side of the end guide roller 240 away from the workpiece inlet and outlet, with a distance between the two being greater than 50 cm and the height being lower than the end guide roller 240.

[0059] The sliding roller 260 is a roller arranged transversely, with its two ends respectively positioned on two shift bearing assemblies, sliding on the shift bearing assemblies along the length direction of the shift bearing assemblies, and its height is higher than the bottom guide wheel 250 and the bottom drive wheel 220, and lower than the end guide roller 240 and the top load roller 230;

[0060] The number of the displacement bearing components of the rear support belt assembly is two, and the two displacement bearing components are symmetrical and horizontally arranged;

[0061] The shift bearing assembly includes a sliding guide rail 271, a sliding block 272, a pulling rope 273, a force storage tension spring 274, a rope reversing wheel 275 and a placement column 276 for accommodating the force storage tension spring 274;

[0062] The sliding guide rail 271 is arranged horizontally, and its length direction is the same as the length direction of the furnace bin 100. It is fixed on the inner wall of the furnace bin 100 or positioned on the inner bottom of the furnace bin 100 through a support such as a support rod, a support plate, or a support frame, and is used to guide the movement of the sliding block 272.

[0063] The sliding block 272 is a hard block, which is slidably positioned on the sliding guide rail 271;

[0064] The end of the sliding roller body 260 is positioned on the sliding block 272;

[0065] One end of the pulling rope 273 is fixed to the sliding block 272, and the other end is fixed to the end of the force storage spring 274 for transmitting the force;

[0066] The rope reversing wheel 275 is positioned on the inner bottom of the furnace bin 100, close to one end of the sliding guide rail 271, and is a longitudinally arranged wheel body that serves to reverse the pulling rope 273;

[0067] The placement column 276 is a hollow cylinder, fixed on the inner wall or outer wall of the furnace bin 100, and arranged horizontally;

[0068] The end of the tension spring 274 not fixed with the pulling rope 273 is fixed to the end of the placement column 276; the pulling rope 273 passes through the placement column 276;

[0069] When the sliding roller 260 slides toward the bottom driving wheel 220, it overcomes the elastic force of the force storage spring 274. The existence of the force storage spring 274 ensures that the conveyor belt 210 is always in a straight state.

[0070] The conveyor belt body 210 is in contact with the bottom drive wheel 220, the end guide roller 240, the bottom guide wheel 250, the sliding roller body 260 and the front support belt assembly, and is supported in an approximately U shape; when the end guide roller 240 is pulled away from the front support belt assembly, the top surface of the conveyor belt body 210 grows, and the sliding roller body 260 overcomes the elastic force and slides toward the direction close to the bottom drive wheel 220.

[0071] Preferably, in order to reduce damage to the power assembly, the motor driving the bottom driving wheel 220 is positioned outside the furnace chamber 100, and the power is transmitted through the transmission structure.

[0072] The drag shift assembly includes two parallel shift rails 510 and a shift vehicle 520 and a rotating hook 530 corresponding to the shift rails 510.

[0073] The shift guide rails 510 are arranged near the workpiece inlet and outlet, and have the same length direction as the furnace bin 100. They are located on both sides of the external conveying assembly 400 and serve as a guide for the shift vehicle 520.

[0074] The shifting vehicle 520 is slidably positioned on the shifting guide rail 510 under the control of the control unit;

[0075] The rotating hook 530 is J-shaped as a whole, and the non-hook end is rotatably connected to the shifting vehicle 520 and rotates under the control of the control unit. The length of the rotating hook 530 is similar to the length direction of the shifting guide rail 510, and the axial direction of the rotating shaft is perpendicular to the length direction of the shifting guide rail 510.

[0076] When the workpiece needs to be transferred, the furnace door is first opened, and then the drag shift assembly is controlled to operate, the core shaft of the end guide roller 240 is hooked and dragged, so that the end guide roller 240 is close to the external conveying assembly 400 and the two are docked.

[0077] Preferably, two longitudinal placement rods 241 are also provided near the external conveying assembly 400 , and after the dragging end guide roller 240 of the shift assembly is dragged, it is embedded in the longitudinal placement rods 241 near the external conveying assembly 400 .

[0078] Example 3

[0079] In order to further improve the continuity and smoothness of heat treatment and further improve the processing efficiency, the embodiment of the present application optimizes and improves the structures of the furnace bin 100, the internal bearing assembly and the external conveying assembly 400 on the basis of the above embodiment, specifically:

[0080] The furnace bin 100 has two workpiece inlets and outlets, located at both ends of the furnace bin 100; both workpiece inlets and outlets are equipped with furnace door lifting systems;

[0081] The number of the external conveying components 400 and the number of the dragging and shifting components are both two, which are respectively arranged near the two workpiece inlets and outlets and are symmetrical with each other;

[0082] like Figure 4 and Figure 5 As shown, the front support belt assembly and the rear support belt assembly have the same structure and are symmetrical to each other.

[0083] When loading and unloading workpieces for heat treatment, two workpiece inlets and outlets can be used to carry out the work simultaneously.

[0084] Example 4

[0085] In order to further save energy, reduce heat dissipation and lower energy consumption, the furnace door lifting system includes a bottom transverse block 310, a side guide plate 320, a furnace door 330, a lifting assembly 340, a transverse load rod 350 and a rotating closing plate 360.

[0086] like Figures 1 to 3 As shown, the bottom transverse block 310 is a horizontally arranged hard rectangular block fixed to the ground, and is used to cooperate with the furnace door 330 to close the workpiece inlet and outlet. The top of the bottom transverse block 310 is provided with a penetration groove 311; the penetration groove 311 is a rectangular groove that adapts to the bottom of the furnace door 330. A guide roller 313 is positioned near the workpiece inlet and outlet and close to the top of the bottom transverse block 310. The guide roller 313 is a horizontally arranged hard roller that rotates around its own axis and is connected to the bottom transverse block 310 to reduce the friction between the conveyor belt body 210 and the bottom transverse block 310.

[0087] The top of the bottom transverse block 310 is lower than the bottom of the end guide roller 240;

[0088] The side guide plates 320 are long rods with a U-shaped or L-shaped cross section, arranged longitudinally, and are two in number. They are fixed at the ends of the furnace bin 100 and located on both sides of the workpiece inlet and outlet, and are used to guide the furnace door 330 to be inserted into the penetration groove 311;

[0089] The furnace door 330 is a rectangular plate inserted between the guide plates 320 on both sides, and serves to seal the workpiece inlet and outlet.

[0090] The lifting assembly 340 is positioned on the ground or on the top of the furnace bin 100, and is preferably a winch structure, which is a prior art, and plays the role of lifting the furnace door 330 to make it rise and fall;

[0091] The cross-loading rod 350 is a long, rigid rod disposed transversely, with both ends detachably fixed to the two side guide plates 320. The side guide plates 320 have multiple positions for positioning the cross-loading rod 350. The cross-loading rod 350 is used to support the rotating closing plate 360.

[0092] The rotating sealing plates 360 are rectangular vertical plates, the tops of which are rotatably connected to the cross-carrying rods 350 and arranged in a row, with spacings of less than 1 mm between each other and less than 2 mm between the side guide plates 320. The rotating sealing plates 360 are combined to seal the workpiece inlet and outlet.

[0093] The bottom of the rotating closing plate 360 ​​is provided with a plate fixing assembly 361; the plate fixing assembly 361 is a buckle, a magnet, etc., used to detachably fix the upward rotating closing plate 360 ​​on the furnace door 330;

[0094] When in use, the furnace door 330 is lifted until the highest workpiece in the furnace (or that needs to enter the furnace) can just enter and exit, and the workpiece entrance and exit are still closed by the rotating closing plate 360. At this time, the appropriate rotating closing plate 360 ​​is lifted according to the size of the workpiece and the layout of the workpiece internal supporting assembly and the external conveying assembly 400 to minimize heat overflow.

[0095] Preferably, in order to ensure the airtightness of the closure of the furnace door 330, a closing bolt 312 is also positioned on the bottom transverse block 310; the closing bolt 312 is rotatably connected to the side wall of the bottom transverse block 310, and the length direction is the same as the thickness direction of the furnace door 330; after the furnace door 330 is closed, the closing bolt 312 is tightened to make it contact and squeeze the furnace door 330, thereby making the furnace door 330 fit more closely with the side guide plate 320.

[0096] Preferably, the tightening and loosening of the closing bolt 312 is driven by a motor.

[0097] Example 5

[0098] Taking into account the different distances between workpieces at different positions and the heat source in the furnace, in order to further improve the uniformity of heating of the workpieces in the furnace, the embodiment of the present application optimizes and improves the structure of the inner bearing assembly based on the above embodiment, specifically:

[0099] like Figures 9 to 12 As shown, the conveyor belt body 210 includes a first belt 211 and a second belt 212. The first belt 211 and the second belt 212 are both sleeved on the inner bearing assembly. The two belts have the same structure and rotate in opposite directions.

[0100] The front support belt assembly and the rear support belt assembly have the same structure and are symmetrical to each other;

[0101] The top load roller 230, the end guide roller 240, the bottom guide wheel 250 and the sliding roller body 260 are each covered with two round tubes of the same structure, which correspond to the first belt 211 and the second belt 212 respectively.

[0102] The bottom driving wheels 220 of the front support belt assembly and the rear support belt assembly are used to drive the first belt 211 and the second belt 212 to rotate respectively; the heat source (heating assembly) of the heat treatment furnace is set away from the end of the heat treatment furnace;

[0103] The inner bearing assembly further includes two conveying turntable assemblies; the two conveying turntable assemblies are respectively arranged near the two end guide rollers 240, and include a bottom telescopic rod 281, a carrying column 282 and a rotating disk 283;

[0104] The bottom telescopic rod 281 is tilted and fixed to the inner bottom of the furnace bin 100, and is telescopic under the control of the control unit;

[0105] The supporting column 282 is fixed to the top of the bottom telescopic rod 281 and is coaxial with the bottom telescopic rod 281 to support the rotating disk 283.

[0106] The supporting rotating disc 283 is in the shape of a circular plate and is positioned on the top of the supporting column 282. It rotates around its own axis and is tilted and close to the conveyor belt 210. The top surface is provided with anti-slip grooves.

[0107] During the heat treatment process, the rotating disk 283, the first belt 211 and the second belt 212 rotate simultaneously, and the workpiece moves along an oblong track in the heat treatment furnace. When the inner bearing component needs to be dragged, the bottom telescopic rod 281 is controlled to retract to avoid it.

[0108] Furthermore, the power source of the rotating disk 283 can be friction from the first belt 211 and the second belt 212 or a motor.

[0109] Preferably, in order to ensure the smoothness and stability of the upper and lower rotating disks 283 of the workpiece and reduce wear, a transverse guide block 285 is also positioned on the rotating disk 283; the transverse guide block 285 is a rod-shaped block with a triangular or approximately triangular longitudinal section, which is fixed on the supporting column 282 through a rod body or a plate body; during the transfer process of the workpiece, it transitions through the transverse guide block 285 and then falls on the rotating disk 283 or detaches from the rotating disk 283.

[0110] Preferably, the rotating disk 283 is provided with a plurality of through slots 284 , and the through slots 284 are through slots;

[0111] The bottom of the rotating disk 283 is also provided with a bottom lifting rod 286, which is coaxial with the supporting column 282, and is extended and tilted under the control of the control unit. The bottom is fixed on the inner bottom of the furnace bin 100, and is lower than the rotating disk 283 when retracted; during the workpiece transfer process, the bottom lifting rod 286 is extended in time to pass through the through groove 284 to pass through the rotating disk 283, and the workpiece on the rotating disk 283 is moved to flip the workpiece on the rotating disk 283, thereby improving the uniformity of the heat treatment of the workpiece (the flipping action is only applicable to relatively large workpieces, such as workpieces with a bottom area greater than 20 square centimeters).

[0112] Preferably, the top of the bottom lifting rod 286 is arranged close to the end guide roller 240, and when it is extended, it also plays a role in assisting the workpiece to board the horizontal guide block 285 and the conveyor belt body 210.

[0113] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A load-bearing system for a heat treatment furnace, characterized in that: A heat treatment furnace with a supporting lifting furnace door; the bearing system includes an internal bearing component and an external conveying component (400); The inner bearing assembly comprises a conveyor belt body (210) sleeved on the front support belt assembly and the rear support belt assembly, top load rollers (230) arranged in a row along the length direction of the furnace bin (100) and used to support the conveyor belt body (210), the front support belt assembly, a longitudinal placement rod (241) and the rear support belt assembly; The front support belt assembly is arranged close to an end of the furnace bin (100) away from the workpiece inlet and outlet and is a reversing roller; The bottom of the longitudinal placement rod (241) is fixed on the inner bottom of the furnace bin (100), and is arranged near the workpiece inlet and outlet. There are two of them, and a placement notch (242) is provided on the side wall near the top. The rear support belt assembly comprises a bottom driving wheel (220) positioned on the inner bottom near the middle of the furnace bin (100), an end guide roller (240) with an end portion embedded in a placement notch (242), a bottom guide wheel (250) located on a side of the end guide roller (240) away from the workpiece inlet and outlet, a sliding roller body (260), and a shift bearing assembly; The sliding roller body (260) is a roller arranged transversely, with both ends positioned on two shift bearing assemblies respectively; The shifting bearing assembly plays an energy storage role and is used to maintain the conveyor belt body (210) in a straight state; The external conveying assembly (400) is positioned outside the furnace bin (100) and is a conveyor belt structure, arranged near the workpiece inlet and outlet of the furnace bin (100), and has a length direction that is the same as the length direction of the internal bearing assembly; When the workpiece on the inner bearing assembly and the external conveying assembly (400) needs to be transferred, the inner bearing assembly is controlled to deform and extend so as to dock with the external conveying assembly (400); The conveyor belt body (210) comprises a first belt (211) and a second belt (212), both of which are sleeved on the inner bearing assembly, have the same structure, and rotate in opposite directions. The top load roller (230), the end guide roller (240), the bottom guide wheel (250) and the sliding roller body (260) are all covered with two circular tubes with the same structure, and the two circular tubes correspond to the first belt (211) and the second belt (212) respectively; The bottom driving wheels (220) of the front support belt assembly and the rear support belt assembly are used to drive the first belt (211) and the second belt (212) to rotate respectively; The inner bearing assembly further comprises two conveying turntable assemblies; the two conveying turntable assemblies are respectively arranged close to the two end guide rollers (240); The conveying turntable assembly comprises a bottom telescopic rod (281) arranged obliquely, a supporting column (282) fixed on the top of the bottom telescopic rod (281), and a rotating disk (283); The rotating disk (283) is in the shape of a circular plate, positioned on the top of the supporting column (282), rotates around its own axis, is tilted and close to the conveyor belt body (210); During the heat treatment process, the rotating disk (283), the first belt (211) and the second belt (212) rotate simultaneously, and the workpiece moves along an oblong trajectory in the heat treatment furnace; The rotating disk (283) is provided with a plurality of through slots (284), and the through slots (284) are through slots; the bottom of the rotating disk (283) is also provided with a bottom top lifting rod (286), which is coaxial with the supporting column (282), and is extended and retracted under the control of the control unit, and is tilted. The bottom is fixed on the inner bottom of the furnace bin (100), and is lower than the rotating disk (283) when retracted; during the workpiece transfer process, the bottom top lifting rod (286) is extended in time from the through slot (284) to pass through the rotating disk (283), and the workpiece on the rotating disk (283) is moved so that the workpiece on the rotating disk (283) is turned over, thereby improving the uniformity of the heat treatment of the workpiece.

2. The support system of the heat treatment furnace according to claim 1, characterized in that: There are two shift bearing assemblies, which are symmetrical and horizontally arranged, and include a sliding guide rail (271), a sliding block (272), a pulling rope (273), a force storage tension spring (274), a rope reversing wheel (275) and a placement column (276); The length direction of the sliding guide rail (271) is the same as the length direction of the furnace bin (100); The sliding block (272) is slidably positioned on the sliding guide rail (271); The end of the sliding roller body (260) is positioned on the sliding block (272); One end of the pulling rope (273) is fixed on the sliding block (272), and the other end is fixed on the end of the force storage tension spring (274); The rope reversing wheel (275) is positioned on the inner bottom of the furnace bin (100), and is arranged near one end of the sliding guide rail (271). It is a longitudinally arranged wheel body and plays a reversing role. The placement column (276) is a hollow column fixed on the inner wall or the outer wall of the furnace bin (100); The end of the force storage tension spring (274) not fixed with the pulling rope (273) is fixed to the end of the placement column (276).

3. The support system of the heat treatment furnace according to claim 1 or 2, characterized in that: The carrying system further includes a dragging and shifting component; The dragging and shifting assembly comprises two parallel shifting guide rails (510), a shifting vehicle (520) and a rotating hook (530) corresponding to the shifting guide rails (510); The shift guide rail (510) is arranged near the workpiece inlet and outlet, has the same length direction as the furnace bin (100), is located on both sides of the external conveying assembly (400), and serves to guide the shift vehicle (520); The shifting vehicle (520) is slidably positioned on the shifting guide rail (510) under the control of the control unit; The rotating hook (530) is J-shaped as a whole, and the non-hook end is rotatably connected to the shifting vehicle (520) and rotates under the control of the control unit. The axial direction of the rotating shaft is perpendicular to the length direction of the shifting guide rail (510).

4. The support system of the heat treatment furnace according to claim 3, characterized in that: The furnace bin (100) has two workpiece inlets and outlets, which are located at both ends of the furnace bin (100); both workpiece inlets and outlets are equipped with furnace door lifting systems; The number of the external conveying components (400) and the number of the dragging and shifting components are both two, which are respectively arranged near the two workpiece inlets and outlets and are symmetrical in pairs; The front support belt assembly and the rear support belt assembly have the same structure and are symmetrical to each other; When loading and unloading workpieces for heat treatment, two workpiece inlets and outlets are used to carry out the work simultaneously.

5. The support system of the heat treatment furnace according to claim 1, characterized in that: A transverse guide block (285) is also positioned on the rotating disk (283); The transverse guide block (285) is a rod-shaped block with a triangular or approximately triangular longitudinal section, and is fixed on the support column (282) via a rod or a plate. During the workpiece transfer process, the workpiece is transferred through the horizontal guide block (285) and then falls on the rotating disk (283) or is separated from the rotating disk (283).

Images