Industrial heat treatment furnace and furnace door lifting structure thereof

Abstract

The invention discloses an industrial heat treatment furnace and a furnace door lifting structure thereof, and relates to the technical field of heat treatment equipment.The structure of a heat treatment furnace in the prior art is optimized and improved, and multiple rows of horizontally-arranged hard guide rails matched with a bearing trolley and used for bearing the bearing trolley are arranged on the inner wall of a furnace body; a shifting assembly is arranged at the bottom of the furnace to be matched with an external driving assembly outside the furnace to realize the displacement of the bearing trolley in the furnace; the external driving assembly is used for providing power for the displacement assembly; the displacement assembly is driven by the external driving assembly to deform and make contact with the bottom of the bearing trolley, and then the bearing trolley is driven to move through displacement of the displacement assembly. The technical effects that the manufacturing and using cost of the industrial heat treatment furnace is relatively low, workpieces needing to be treated in the furnace are tightly arranged, and the space utilization rate in the furnace is high are achieved.

Description

Technical Field

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

[0002] Closed heat treatment furnaces are widely used due to their low energy consumption and good high-temperature stability. In the prior art, closed heat treatment furnaces include a carrying system for carrying workpieces and a furnace door 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.

[0003] In order to accommodate workpieces of different sizes, the box size of a closed heat treatment furnace is usually designed to be larger; during use, due to the large box size, the entire furnace body needs to be heated even when the workpiece size is small, and the heating space cannot be flexibly adjusted according to the workpiece size, resulting in energy consumption and increased costs; in response to the above problems, a Chinese invention patent with authorization announcement number CN115341084B discloses a heat treatment furnace, which has an opening at the bottom of the furnace body, and refractory and heat-insulating linings are arranged on the four side walls and the top of the furnace body, and a heating device is arranged on the top of the furnace body; a lifting platform is located directly below the furnace body for lifting a trolley inside the furnace body, and the lifting height of the trolley can be flexibly adjusted according to the specific workpiece size without heating the entire furnace body, thereby reducing heat treatment energy consumption.

[0004] Although the above scheme reduces the energy consumption of heat treatment to a certain extent and thus reduces the energy cost, its carrying capacity for heat-treated workpieces is relatively poor, and the number of workpieces that can be processed at a single time is relatively small; and the above scheme requires the lifting platform to be lifted and lowered in the furnace, and the furnace needs to have a higher temperature during the heat treatment process, which makes the lifting platform in the furnace susceptible to thermal damage, with a high failure rate, high maintenance cost and relatively short service life; and in the prior art, the carrying trolley used to carry workpieces in and out of the heat treatment furnace needs to be manually dragged or transported using a cart or tractor, and the operation process is complicated and even requires the heat treatment furnace to be cooled before the carrying trolley can be entered and exited, which is inefficient and time-consuming and labor-intensive, and is not conducive to the automation of the heat treatment process.

[0005] Therefore, there is a need for an industrial heat treatment furnace with relatively low manufacturing and use costs, compact placement of workpieces to be treated in the heat treatment furnace, and high furnace space utilization. Summary of the invention

[0006] The embodiment of the present application solves the technical problems in the prior art of low efficiency of the loading and unloading trolley during the process of processing workpieces in the heat treatment furnace, low utilization rate of the space in the furnace, and relatively small number of workpieces that can be carried in the furnace at a single time by providing an industrial heat treatment furnace; and achieves the technical effects of relatively low manufacturing and use costs of the industrial heat treatment furnace, close placement of workpieces to be processed in the furnace, and high utilization rate of the space in the furnace.

[0007] The embodiment of the present application provides an industrial heat treatment furnace, including a furnace body with a furnace opening at one end, a lifting furnace door, a carrying trolley, and also includes a shifting component, an external driving component positioned outside the furnace body and used to be inserted into the furnace body in time to drive the gear on the carrier to rotate;

[0008] A plurality of inner guide rails in the form of rectangular plates are fixed on the inner side wall of the furnace body;

[0009] The shifting assembly comprises a carrier, a sliding carrier, a rotating rod which is arranged obliquely and whose bottom is rotatably connected to the sliding carrier, a connecting body, and a reversing wheel which is arranged at one end close to the furnace body and away from the furnace opening and is used to guide the direction of the connecting body;

[0010] The carrier is fixed at a position near the furnace bottom and the furnace mouth, and is provided with a gear matching the external drive assembly and a plurality of horizontal columns that rotate under the drive of the gear;

[0011] The sliding carriage is a rectangular block-shaped carriage that moves along the length direction of the furnace body at the bottom of the furnace;

[0012] The connector is a combination of multiple steel wire ropes, which are used to transmit power from the column on the carrier to move the sliding trolley and drive the rotating rod to rotate; after the rotating rod rotates to embed into the bottom of the load-bearing trolley, the sliding trolley drives the load-bearing trolley to move;

[0013] The wheel bodies of the carrying trolley are located at the bottom of the trolley near the two sides.

[0014] Furthermore, a top wheel, a retractable wheel and a bottom wheel are positioned on a vertically arranged surface of the carrier from top to bottom; the top wheel, the retractable wheel and the bottom wheel are all horizontally arranged cylindrical wheel bodies, and are all connected to the carrier by rotating around their own axes; the top wheel and the bottom wheel are linked, and when the former rotates forward, the latter rotates synchronously in the reverse direction;

[0015] Two driving gears are arranged one above and one below on another vertically arranged surface of the carrier, and the two driving gears are coaxial with the top wheel and the retracting wheel respectively. When the two driving gears rotate, they respectively drive the top wheel and the retracting wheel to rotate; the axis of the driving gear is parallel to the horizontal ground and perpendicular to the length direction of the furnace body.

[0016] Further, the connector includes a first connector, a second connector and a pulling connector;

[0017] The first connecting body, the second connecting body and the pulling connecting body are all steel wire ropes;

[0018] One end of the first connecting body is wound and positioned on the top wheel, and the other end is fixed to the top of the end of the sliding carrier vehicle close to the carrier frame;

[0019] One end of the second connecting body is fixed to the top of the end of the sliding carrier vehicle close to the reversing wheel, passes through the bottom of the sliding carrier vehicle after bypassing the reversing wheel, and the other end is wound and positioned on the bottom wheel;

[0020] One end of the pulling connecting body is wound and positioned on the winding and unwinding wheel, and the other end is fixed to the surface of the rotating rod close to the carrier frame; the fixing point of the pulling connecting body on the rotating rod is more than 20 cm away from the rotating axis of the rotating rod;

[0021] During use, the rotation of the top wheel and the bottom wheel will drive the sliding carrier vehicle to move, and the difference in the number of turns of the winding and unwinding wheel and the top wheel will cause the rotating rod to rotate.

[0022] Furthermore, the external drive assembly includes a bottom support body, a top guide plate, a sliding carrier plate, a rotating gear and a drive body;

[0023] The bottom support body is an electric telescopic rod, a pneumatic telescopic rod or a telescopic oil cylinder arranged longitudinally, and the bottom is fixed on the ground;

[0024] The top guide plate is a rigid plate body arranged horizontally, and the bottom is fixed to the top of the bottom support body;

[0025] The sliding carrier plate is a rigid plate body arranged longitudinally, and the length direction is the same as the length direction of the furnace body. Under the coordinated control of the power assembly and the control unit, it slides and positions on the top guide plate and slides along its own length direction; a rotating gear matching the drive gear is positioned on the sliding carrier plate; the rotating gear rotates driven by the drive body located on the bottom support body; when it is necessary to drive the drive gear to rotate, the sliding carrier plate moves and is inserted into the gap between the first insertion plate and the second insertion plate, so that the two rotating gears mesh with the two drive gears.

[0026] Furthermore, the number of the inner guide rails is an even number, arranged in two columns on the inner side wall of the furnace body, two in a group, and the heights of the inner guide rails in the same group are equal and parallel to each other;

[0027] The inner guide rail is a rigid metal strip, arranged horizontally; during use, one of the surfaces of the inner guide rail in the furnace parallel to the horizontal ground contacts the bottom wheel body of the carrying trolley.

[0028] Preferably, the inner guide rail is a hard strip with a "C"-shaped longitudinal section, and during use, the carrying trolley is inserted into the inner guide rail.

[0029] Preferably, the connector is a combination of belts woven from multiple steel wires;

[0030] The first connector, the second connector and the pulling connector are all belt bodies woven from steel wires;

[0031] The width of the first connecting body and the second connecting body is greater than two-thirds of the total width of the furnace body;

[0032] The top wheel, the retractable wheel and the bottom wheel are all rollers arranged transversely.

[0033] Preferably, the first connector is a mesh structure.

[0034] Preferably, the displacement assembly further comprises an auxiliary carrier;

[0035] Two side rods are fixed to the edge of the first connector near the middle; the side rods are located on both sides of the first connector;

[0036] The auxiliary vehicle is a rectangular block-shaped vehicle, with wheels at the bottom, a through slot on the body, a top rotating column positioned at the top, and two side plates fixed on the side walls;

[0037] The auxiliary vehicle is located between the sliding vehicle and the carrier, and is located at the bottom of the first connector, and the connector is pulled through the through slot to penetrate the auxiliary vehicle;

[0038] The side plate body is a hard plate body, which is arranged longitudinally, fixed on both sides of the auxiliary vehicle and has a top higher than the top rotating column.

[0039] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0040] By optimizing and improving the structure of the heat treatment furnace in the prior art, multiple rows of horizontally arranged hard guide rails matching the carrying trolley and used to support the carrying trolley are arranged on the inner wall of the furnace body; a shifting assembly is arranged at the bottom of the furnace to cooperate with an external driving assembly outside the furnace to realize the displacement of the carrying trolley in the furnace; the external driving assembly is used to provide power for the shifting assembly; the shifting assembly is deformed and contacts the bottom of the carrying trolley under the drive of the external driving assembly, and then drives the carrying trolley to move through its own displacement; the technical problems of low efficiency of the carrying trolley in and out during the process of processing workpieces in the heat treatment furnace in the prior art, low utilization rate of the space in the furnace, and relatively small amount of workpieces that can be carried in the furnace at a single time are effectively solved; thereby achieving the technical effects of relatively low manufacturing and use costs of the industrial heat treatment furnace, compact placement of the workpieces to be processed in the furnace, and high utilization rate of the space in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the appearance and structure of the industrial heat treatment furnace of this application;

[0042] Figure 2 This is a schematic diagram of the internal structure of the industrial heat treatment furnace of this application;

[0043] Figure 3 It is a schematic diagram of the position relationship between the load-bearing trolley and the shifting assembly;

[0044] Figure 4 It is a schematic diagram of the structure of the external drive component;

[0045] Figure 5 It is a simplified structural diagram of the shifting assembly;

[0046] Figure 6 It is the structural schematic diagram of the furnace door;

[0047] Figure 7 It is a schematic diagram of the structure of the displacement assembly when the connecting body is in the belt body state;

[0048] Figure 8 It is a schematic diagram of the position relationship between the auxiliary carrier and the skid carrier;

[0049] Fig. 9 It is a simplified structural diagram of the shifting assembly with an auxiliary carrier;

[0050] Fig.10 This is a schematic diagram of the appearance structure of the auxiliary vehicle.

[0051] In the figure:

[0052] Furnace body 100, inner guide rail 110, side guide rail 210, top door 220, lifting assembly 230, bottom bar 241, first insertion plate 242, second insertion plate 243, carrier 310, driving gear 311, top wheel 320, retracting wheel 330, bottom wheel 340, sliding carrier 350, rotating rod 360, first connector 371, second connector 372, pulling connector 373, side rod 374, reversing wheel 380, auxiliary carrier 390, through groove 391, top rotating column 392, side plate body 393, bottom support body 410, top guide plate 420, sliding carrier plate 430, rotating gear 440, driving body 450, carrying trolley 500, driving groove 510. DETAILED DESCRIPTION

[0053] To facilitate the 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.

[0054] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0056] Embodiment 1

[0057] like Figures 1 to 4 As shown, the industrial heat treatment furnace of the present application includes a furnace body 100, a furnace door, a shifting assembly, an external driving assembly, a carrying trolley 500, a power assembly and a control unit.

[0058] The furnace body 100 is the main body of the heat treatment furnace, which is a hollow column or box structure, arranged horizontally, with a built-in heating device, a bottom frame fixed at the bottom, and a furnace opening at one end; the bottom frame is a column or frame structure, fixed on the ground, and supports the furnace body 100;

[0059] A plurality of inner guide rails 110 are fixed on the inner side wall of the furnace body 100;

[0060] The inner rails 110 are used to support the trolley 500 and guide the movement of the trolley 500. The inner rails 110 are in even number and are arranged in two rows on the inner side wall of the furnace body 100, with two in each group. The inner rails 110 in the same group have equal heights and are parallel to each other.

[0061] The inner rail bar 110 is a hard metal bar, which is arranged horizontally. When in use, one of the surfaces of the inner rail bar 110 parallel to the horizontal ground contacts the bottom wheel body of the carrying trolley 500 .

[0062] Furthermore, the inner guide rail 110 is a horizontally arranged rectangular plate-shaped bar.

[0063] The furnace door is of lifting type.

[0064] Further, the furnace door includes side rails 210, a top door 220, a lifting assembly 230 and a bottom door;

[0065] The side guide rails 210 are hard straight guide rails, arranged longitudinally, in two numbers, fixed on both sides of the furnace mouth, and used to guide the top door 220 and the bottom door to rise and fall vertically; the top door 220 is a hard rectangular plate body, arranged vertically, slidably positioned on the side guide rails 210, and raised and lowered under the drive of the lifting assembly 230; the area of ​​the top door 220 is larger than the furnace mouth; the bottom of the top door 220 is provided with a plugging groove for the bottom door to be inserted; the lifting assembly 230 is a winch structure, positioned on the furnace body 100 near the furnace mouth and above the furnace mouth, controlled by the control unit to pull up the top door 220 when the winch rope is retracted; the bottom door is a hard plate body arranged longitudinally as a whole, including a bottom strip 241, a first plugging plate 242 and a second plugging plate 2 43; the bottom bar 241 is a horizontal hard bar, and its two ends are slidably positioned on the two side guide rails 210 respectively; the bottom bar 241 is directly or indirectly fixed to the lifting component 230, and the lifting component 230 is controlled by the control unit to drive the bottom bar 241 to move up and down; the first insertion plate 242 and the second insertion plate 243 are both longitudinally arranged hard rectangular plates, the two are of the same height and the bottoms are fixed on the top of the bottom bar 241, and the gap between them is 10 to 15 cm; the first insertion plate 242 and the second insertion plate 243 can be completely inserted into the insertion groove; the height of the first insertion plate 242 is greater than two-thirds of the height of the furnace mouth; when the furnace door needs to be opened and closed, the top door 220 and the bottom door are controlled to move up and down to expose and close the furnace mouth.

[0066] The shift assembly is positioned at the bottom of the furnace body 100 and is used to drive the carrying trolley 500 in the furnace to move, and includes a carrier 310, a sliding trolley 350, a rotating rod 360, a connector and a reversing wheel 380;

[0067] The carrier 310 is a plate-shaped frame body arranged vertically, and its bottom is fixed at a position near the furnace bottom and the furnace mouth, playing a role of bearing support; a top wheel 320, a retracting wheel 330 and a bottom wheel 340 are respectively positioned from top to bottom on a vertically arranged surface of the carrier 310; the top wheel 320, the retracting wheel 330 and the bottom wheel 340 are all horizontally arranged cylindrical wheel bodies, and are all connected to the carrier 310 by rotating around their own axes; the top wheel 320 and the bottom wheel 340 are linked (linked together by gears and other components), and when the former rotates forward, the latter rotates synchronously in the reverse direction;

[0068] Two driving gears 311 are arranged one above the other on the vertical surface of the carrier 310. The two driving gears 311 are coaxial with the top wheel 320 and the retracting wheel 330 respectively. When the two driving gears 311 rotate, the top wheel 320 and the retracting wheel 330 are driven to rotate respectively. The axis of the driving gear 311 is parallel to the horizontal ground and perpendicular to the length direction of the furnace body 100.

[0069] The sliding carriage 350 is a rectangular block-shaped carriage with wheels at the bottom, which slides along the length direction of the furnace body 100 at the furnace bottom and is used to carry and support the rotating rod 360;

[0070] The rotating rod 360 is a hard rod body, which is tilted and rotatably connected to the sliding vehicle 350 at the bottom. The axial direction of the rotating shaft is the same as the axial direction of the driving gear 311. The retractable wheel 330 pulls the rotating rod 360 through the connecting body to rotate it so that its bottom can be embedded in the bottom of the carrying vehicle 500, so that the carrying vehicle 500 moves together with the sliding vehicle 350.

[0071] The connector is a combination of multiple steel wire ropes, which are used to transmit power from the top wheel 320, the retractable wheel 330 and the bottom wheel 340 to move the skid trolley 350 and drive the rotating rod 360 to rotate;

[0072] The reversing wheel 380 is a cylindrical wheel body, which is arranged horizontally, used to guide the direction of the connecting body, rotates around its own axis and is connected in the furnace body 100, and the bottom is close to the furnace body and close to the end of the furnace body 100 away from the furnace mouth;

[0073] The connecting body includes a first connecting body 371, a second connecting body 372 and a pulling connecting body 373;

[0074] The first connector 371, the second connector 372 and the pulling connector 373 are all steel wire ropes;

[0075] One end of the first connector 371 is wound around and positioned on the top wheel 320, and the other end is fixed to the top of the end of the skid trolley 350 close to the carrier 310;

[0076] One end of the second connector 372 is fixed to the top of the end of the skid trolley 350 close to the reversing wheel 380, passes through the bottom of the skid trolley 350 after bypassing the reversing wheel 380, and the other end is wound around and positioned on the bottom wheel 340;

[0077] One end of the pulling connector 373 is wound around and positioned on the retracting wheel 330, and the other end is fixed on the surface of the rotating rod 360 close to the carrier 310; the fixed point of the pulling connector 373 on the rotating rod 360 is greater than 20 cm away from the rotating axis of the rotating rod 360;

[0078] During use, the rotation of the top wheel 320 and the bottom wheel 340 will drive the sliding vehicle 350 to move, and the difference in the number of revolutions of the retractable wheel 330 and the top wheel 320 will cause the rotating rod 360 to rotate.

[0079] The external drive assembly is used to drive the driving gear 311 to rotate in a timely manner, is positioned on the ground outside the furnace body 100 and is arranged near the furnace mouth, and includes a bottom support body 410, a top guide plate 420, a sliding carrier plate 430, a rotating gear 440 and a driving body 450;

[0080] The bottom support body 410 is a longitudinally arranged electric telescopic rod, a pneumatic telescopic rod or a telescopic cylinder, and the bottom is fixed on the ground;

[0081] The top guide plate 420 is a horizontally arranged hard plate, the bottom of which is fixed to the top of the bottom support body 410;

[0082] The sliding carrier 430 is a longitudinally arranged hard plate body, and its length direction is the same as the length direction of the furnace body 100. It is slidably positioned on the top guide plate 420 and slides along its own length direction under the coordinated control of the power component and the control unit; a rotating gear 440 matching the driving gear 311 is positioned on the sliding carrier 430; the rotating gear 440 rotates under the drive of the driving body 450 located on the bottom support body 410; the driving body 450 is preferably a combination of a motor and a chain transmission structure; when it is necessary to drive the driving gear 311 to rotate, the sliding carrier 430 moves and is inserted into the gap between the first insertion plate 242 and the second insertion plate 243, so that the two rotating gears 440 are meshed with the two driving gears 311.

[0083] The carrying trolley 500 is a horizontally arranged hard plate-shaped trolley, the wheel body is located at the bottom of the trolley near the two sides, and the bottom is provided with one, one row or multiple rows of driving grooves 510; the driving groove 510 is a groove with an opening downward, and is used for the rotating rod 360 to be inserted after rotation;

[0084] After the carrying trolley 500 is loaded into the furnace body 100 , the bottom wheel body abuts against the inner guide rail 110 .

[0085] The power assembly is used to provide power for the operation of the various components of the industrial heat treatment furnace of this application, and the control unit plays a role in controlling the coordinated operation of the various components of the industrial heat treatment furnace. Both are prior arts and will not be elaborated here.

[0086] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0087] When the industrial heat treatment furnace of the embodiment of the present application is used:

[0088] First, place the workpieces to be heat-treated on multiple carrier trolleys 500; then plan and determine the layout of the multiple carrier trolleys 500 in the furnace body 100 according to the total height of the carrier trolleys 500 and the workpieces thereon, so as to make full use of the space in the furnace; control the furnace door to open a furnace opening with an appropriate height and size according to the height of the workpiece and the target height where the carrier trolley 500 is placed; then control the external drive assembly to move so that the rotating gear 440 meshes with the driving gear 311; thereafter, use equipment such as a robotic arm to horizontally clamp the carrier trolley 500 and select an appropriate height to fill it into the furnace body 100; after that, control the displacement assembly to deform and drive the carrier trolley 500 to move to the target position, and finally close the furnace door.

[0089] When the workpieces that need to be taken out of the heat treatment are to be removed, the steps are similar to the putting-in process. After the displacement assembly drives the carrier trolley 500 to move to the furnace door, use equipment such as a robotic arm to horizontally clamp out the carrier trolley 500.

[0090] Furthermore, in order to prevent the carrier trolley 500 from tilting due to extrusion when the rotating rod 360 touches the carrier trolley 500, which affects the stability of the workpieces placed thereon, the inner guide rail strip 110 is a hard strip with a "C"-shaped longitudinal section. During use, the carrier trolley 500 is inserted into the inner guide rail strip 110.

[0091] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0092] It solves the technical problems in the prior art that the efficiency of the carrier trolley entering and leaving the heat treatment furnace during the workpiece treatment process is low, the utilization rate of the space in the furnace is low, and the number of workpieces that can be carried in the furnace at one time is relatively small; it realizes the technical effects that the manufacturing and use costs of the industrial heat treatment furnace are relatively low, the workpieces to be processed in the furnace are placed tightly, and the utilization rate of the space in the furnace is high.

[0093] Embodiment 2

[0094] In order to further ensure the movement stability of the sliding carrier 350 and the rotation stability of the rotating rod 360, the embodiment of the present application optimizes and improves the structure of the connecting body on the basis of the above embodiment. Specifically:

[0095] As Figures 5 to 7 shown, the connecting body is a combination of belts woven by multiple steel wires; the first connecting body 371, the second connecting body 372, and the pulling connecting body 373 are all belts woven by steel wires.

[0096] The widths of the first connecting body 371 and the second connecting body 372 are greater than two-thirds of the total width of the furnace body 100;

[0097] The top wheel 320, the winding and unwinding wheel 330, and the bottom wheel 340 are all rollers arranged horizontally.

[0098] When the industrial heat treatment furnace of the embodiment of the present application is in use: the workpiece can be directly placed on the first connector 371 and then brought into the deep of the furnace body 100 by the first connector 371 for heat treatment; or after the carrying trolley 500 is loaded in the furnace body 100, the first connector 371 can be used to carry some workpieces with smaller volume and weight for heat treatment, thereby further improving the utilization rate of the space in the furnace.

[0099] Preferably, the first connector 371 is a mesh structure.

[0100] Preferably, when the first connecting body 371 carries a workpiece, a hard pallet can be used as a carrier of the workpiece, and the pallet can be placed on the first connecting body 371 when needed.

[0101] Embodiment 3

[0102] In order to improve the carrying capacity of the first connecting body 371, so that the first connecting body 371 can stably and reliably carry more and larger workpieces, the embodiment of the present application optimizes and improves the structure of the first connecting body 371 on the basis of the above embodiment, and adds an auxiliary carrier 390 in the shifting assembly; when the sliding carrier 350 moves to a position close to the reversing wheel 380, the auxiliary carrier 390 moves to a position close to the middle of the inner bottom of the furnace body 100 and supports the first connecting body 371; specifically:

[0103] like Figures 8 to 10 As shown, two side rods 374 are fixed to the edge near the middle of the first connecting body 371; the side rods 374 are hard rods arranged transversely, and the length direction is the same as the width direction of the first connecting body 371, the length is greater than 2 cm, and they are located on both sides of the first connecting body 371; the side rods 374 are used to resist and push the auxiliary vehicle 390 to move;

[0104] The auxiliary vehicle 390 is a rectangular block-shaped vehicle, with wheels at the bottom, a through slot 391 on the body, a top rotating column 392 positioned at the top, and two side plates 393 fixed on the side walls;

[0105] The auxiliary vehicle 390 is located between the sliding vehicle 350 and the carrier 310, and is located at the bottom of the first connector 371. The pull connector 373 passes through the auxiliary vehicle 390 from the through slot 391; the second connector 372 passes through the bottom of the auxiliary vehicle 390;

[0106] The top rotating column 392 is a horizontally arranged cylindrical body, which is connected to the top of the auxiliary vehicle 390 by rotating around its own axis, and its axial direction is the same as the width direction of the first connecting body 371, and its top abuts against the bottom of the first connecting body 371;

[0107] The side plates 393 are hard plates, arranged longitudinally, fixed on both sides of the auxiliary vehicle 390 and with the top higher than the top rotating column 392; the spacing between the side plates 393 is greater than the width of the first connector 371 by 0.5 to 1.5 cm;

[0108] During the movement of the sliding carrier 350 toward the reversing wheel 380, when the sliding carrier 350 moves to a position close to the middle of the furnace body 100, the side rod 374 is exposed and contacts the side plate 393, pushing the side plate 393 to move until the sliding carrier 350 is close to the reversing wheel 380 (at this time, the auxiliary carrier 390 moves to a position close to the middle of the inner bottom of the furnace body 100).

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial heat treatment furnace, comprising a furnace body (100) with a furnace opening at one end, a lifting furnace door, and a carrying trolley (500), characterized in that: It also includes a shifting assembly, and an external driving assembly positioned outside the furnace body (100) and used to be inserted into the furnace body (100) at an appropriate time to drive the gears on the carrier (310) to rotate; A plurality of inner guide rails (110) in the form of rectangular plates are fixed on the inner side wall of the furnace body (100); The shifting assembly comprises a carrier (310), a sliding carrier (350), a rotating rod (360) which is arranged obliquely and whose bottom is rotatably connected to the sliding carrier (350), a connecting body, and a reversing wheel (380) which is arranged at one end close to the furnace body (100) and away from the furnace opening and is used to guide the direction of the connecting body; The carrier (310) is fixed at a position near the furnace bottom and the furnace mouth, and is provided with a gear matched with an external drive assembly and a plurality of horizontal columns that rotate under the drive of the gear; The sliding carriage (350) is a rectangular block-shaped carriage, which moves along the length direction of the furnace body (100) at the furnace bottom; The connecting body is a combination of multiple steel wire ropes, which are used to transmit power from the column on the carrier (310) so as to move the sliding carrier (350) and drive the rotating rod (360) to rotate; after the rotating rod (360) rotates to be embedded in the bottom of the carrying trolley (500), the sliding carrier (350) drives the carrying trolley (500) to move; The wheels of the carrying trolley (500) are located at the bottom of the trolley (500) close to both sides.

2. The industrial heat treatment furnace according to claim 1, characterized in that: A top wheel (320), a retractable wheel (330) and a bottom wheel (340) are respectively positioned on a vertically arranged surface of the carrier (310) from top to bottom; the top wheel (320), the retractable wheel (330) and the bottom wheel (340) are all horizontally arranged cylindrical wheel bodies, and are all connected to the carrier (310) by rotation around their own axes; the top wheel (320) and the bottom wheel (340) are linked, and when the former rotates forward, the latter rotates synchronously in the reverse direction; Two driving gears (311) are arranged one above and one below on another vertically arranged surface of the carrier (310); the two driving gears (311) are coaxial with the top wheel (320) and the retracting wheel (330) respectively; when the two driving gears (311) rotate, they respectively drive the top wheel (320) and the retracting wheel (330) to rotate; the axis of the driving gear (311) is parallel to the horizontal ground and perpendicular to the length direction of the furnace body (100).

3. The industrial heat treatment furnace according to claim 2, characterized in that: The connecting body comprises a first connecting body (371), a second connecting body (372) and a pulling connecting body (373); The first connector (371), the second connector (372) and the pulling connector (373) are all steel wire ropes; One end of the first connector (371) is wound around and positioned on the top wheel (320), and the other end is fixed to the top of the end of the sliding vehicle (350) close to the carrier (310); One end of the second connecting body (372) is fixed to the top of the end of the sliding carrier (350) near the reversing wheel (380), passes around the reversing wheel (380), then passes through the bottom of the sliding carrier (350), and the other end is wound and positioned on the bottom wheel (340); One end of the pulling connecting body (373) is wound and positioned on the winding and unwinding wheel (330), and the other end is fixed to the surface of the rotating rod (360) near the carrier (310); The fixing point of the pulling connecting body (373) on the rotating rod (360) is more than 20 cm away from the rotating axis of the rotating rod (360). During use, the rotation of the top wheel (320) and the bottom wheel (340) will drive the sliding carrier (350) to move, and the difference in the number of turns of the winding and unwinding wheel (330) and the top wheel (320) will cause the rotating rod (360) to rotate.

4. The industrial heat treatment furnace according to claim 3, characterized in that: The external drive assembly includes a bottom support body (410), a top guide plate (420), a sliding carrier plate (430), a rotating gear (440) and a drive body (450). The bottom support body (410) is an electric telescopic rod, a pneumatic telescopic rod or a telescopic oil cylinder arranged longitudinally, and the bottom is fixed on the ground. The top guide plate (420) is a rigid plate body arranged horizontally, and the bottom is fixed to the top of the bottom support body (410). The sliding carrier plate (430) is a rigid plate body arranged longitudinally, and the length direction is the same as the length direction of the furnace body (100). Under the coordinated control of the power assembly and the control unit, it slides and positions on the top guide plate (420) and slides along its own length direction; A rotating gear (440) matching the driving gear (311) is positioned on the sliding carrier plate (430); The rotating gear (440) rotates driven by the drive body (450) located on the bottom support body (410); When it is necessary to drive the driving gear (311) to rotate, the sliding carrier plate (430) moves and is inserted into the gap between the first insertion plate (242) and the second insertion plate (243), so that the two rotating gears (440) are engaged with the two driving gears (311).

5. The industrial heat treatment furnace according to claim 1, characterized in that: The number of the inner guide strips (110) is an even number, and they are arranged in two columns on the inner side wall of the furnace body (100), with every two as a group. The inner guide strips (110) in the same group have the same height and are parallel to each other. The inner guide strip (110) is a rigid metal strip and is arranged horizontally; During use, one of the surfaces of the inner guide strip (110) parallel to the horizontal ground contacts the bottom wheel body of the carrier car (500).

6. The industrial heat treatment furnace according to claim 1, characterized in that: The inner guide strip (110) is a hard strip with a "C"-shaped longitudinal section. During use, the carrier car (500) is inserted into the inner guide strip (110).

7. The industrial heat treatment furnace according to claim 3, characterized in that: The connecting body is a combination of belts woven by multiple steel wires. The first connecting body (371), the second connecting body (372) and the pulling connecting body (373) are all belts woven by steel wires. The widths of the first connecting body (371) and the second connecting body (372) are greater than two-thirds of the total width of the furnace body (100). The top wheel (320), the winding and unwinding wheel (330) and the bottom wheel (340) are all rollers arranged horizontally.

8. The industrial heat treatment furnace according to claim 7, characterized in that: The first connector (371) is a mesh structure.

9. The industrial heat treatment furnace according to claim 7, characterized in that: The displacement assembly further comprises an auxiliary vehicle (390); two side rods (374) are fixed to the edge of the first connecting body (371) close to the middle; the side rods (374) are located on both sides of the first connecting body (371); The auxiliary vehicle (390) is a rectangular block-shaped vehicle, with wheels at the bottom, a through slot (391) on the vehicle body, a top rotating column (392) positioned at the top, and two side plates (393) fixed on the side walls; The auxiliary vehicle (390) is located between the sliding vehicle (350) and the carrier (310), and is located at the bottom of the first connector (371). The connector (373) is pulled through the through slot (391) to penetrate the auxiliary vehicle (390). The side plate body (393) is a hard plate body, arranged longitudinally, fixed on both sides of the auxiliary vehicle (390) and with the top higher than the top rotating column (392).

10. A furnace door lifting structure, characterized in that: An industrial heat treatment furnace according to claim 1, claim 7 or claim 9; The furnace door comprises side guide rails (210), a top door (220), a lifting assembly (230) and a bottom door; The side guide rails (210) are arranged longitudinally, are two in number, and are fixed on both sides of the furnace opening; The top door (220) is a hard rectangular plate, which is arranged vertically, slidably positioned on the side guide rail (210), and is raised and lowered under the drive of the lifting assembly (230); The top door (220) has an area larger than the furnace mouth and a plugging slot is provided at the bottom; The lifting assembly (230) is a winch structure, and is positioned on the furnace body (100) near the furnace opening; The bottom door as a whole is a hard plate body arranged longitudinally, comprising a bottom strip (241), a first inserting plate (242) and a second inserting plate (243); The two ends of the bottom bar (241) are respectively slidably positioned on the two side guide rails (210) and are directly or indirectly fixed to the lifting assembly (230); The first inserting plate (242) and the second inserting plate (243) are both longitudinally arranged hard rectangular plates, with a gap of 10 to 15 cm between them, and can be completely inserted into the inserting slot; When the furnace door needs to be opened or closed, the top door (220) and the bottom door are controlled to move up and down to expose and close the furnace opening.

Images