Automatic heat treatment industrial furnace and furnace door system for hanging heat treatment furnace thereof

Abstract

The invention discloses an automatic heat treatment industrial furnace and a suspended heat treatment furnace door system 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 a long-strip-shaped in-furnace conveying assembly matched with a bearing trolley is arranged on the inner wall of a furnace body; the in-furnace conveying assembly comprises a horizontally-arranged hard strip used for bearing the bearing trolley to move. The bearing trolley is loaded into the heat treatment furnace in multiple layers according to the height of a workpiece carried by the bearing trolley, so that the heat energy in the furnace is fully utilized while the bearing capacity of the heat treatment furnace is increased; the heat treatment process of the automatic heat treatment industrial furnace is efficient and convenient, the automation degree is high, the time consumed for the bearing trolley to go in and out of the furnace body is short, the energy consumption cost is low in the heat treatment process, the high-temperature stability is good, and the heat treatment furnace can bear many workpieces at a time.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment equipment, and particularly to an automated industrial heat treatment furnace and a hanging heat treatment furnace door system thereof. Background Art

[0002] Enclosed 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 (able to maintain a small temperature range fluctuation within the furnace for a long time).

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

[0004] In order to accommodate workpieces of different sizes, the box size of the enclosed heat treatment furnace is usually designed to be relatively large; during the use of this kind of heat treatment furnace, on the one hand, due to the large box size, even when the workpiece size is small, the entire furnace body needs to be heated, and the heating space cannot be flexibly adjusted according to the workpiece size, resulting in energy consumption and cost increase; in response to the above problems, the Chinese invention patent with the authorization publication number CN115341084B discloses a heat treatment furnace. The bottom of the furnace body of this heat treatment furnace is provided with a through opening, refractory heat insulation linings are provided on the four side walls and the top of the furnace body, and the heating device is arranged on the top of the furnace body; a lifting platform is located directly below the furnace body for the lifting of the trolley inside the furnace body, and when the trolley is lifted inside the furnace body, its edge is in clearance fit with the lining; a rangefinder is also arranged on the top of the furnace body to measure the distance between the upper surface of the trolley and the furnace top, and it can flexibly adjust the lifting height of the trolley according to the specific workpiece size without heating the entire furnace body, reducing the heat treatment energy consumption, optimizing the energy configuration, and reducing the energy consumption cost.

[0005] Although the above solution reduces the heat treatment energy consumption to a certain extent and thus reduces the energy consumption cost, its load-bearing capacity for heat-treated workpieces is poor, and the number of workpieces that can be processed at one time is small; moreover, the above solution requires the lifting platform to lift inside the furnace, and during the heat treatment process, a relatively high temperature is required inside the furnace, which causes the lifting platform inside the furnace to be easily damaged by heat, with a high failure rate, high maintenance cost, and relatively short service life, which is not conducive to popularization.

[0006] And in the prior art, the loading trolley for carrying workpieces needs to be manually dragged (with the help of hooks, etc.) or transported using a trolley and a tractor, etc. when entering and leaving the heat treatment furnace. The operation process is complex and even requires the heat treatment furnace to be cooled before the loading trolley can enter and exit, with low efficiency and time-consuming and laborious, which is not conducive to the automated progress of the heat treatment process.

[0007] Therefore, a heat treatment furnace is needed that has an efficient and convenient heat treatment process, a high degree of automation, a short time for the carrying trolley to enter and exit the furnace body, low energy consumption cost during the heat treatment process, good high-temperature stability, and a large number of workpieces that can be carried in the heat treatment furnace at a single time. Summary of the invention

[0008] The embodiment of the present application solves the technical problems in the prior art that the heat treatment furnace has low efficiency, time and labor consumption, high energy consumption cost, small amount of workpieces that can be carried in the furnace at a single time, and low space utilization rate in the furnace by providing an automated heat treatment industrial furnace; the automated heat treatment industrial furnace is realized, the heat treatment process is efficient and convenient, the degree of automation is high, the time consumption for the load carriage to enter and exit the furnace body is short, the energy consumption cost during the heat treatment process is low, the high-temperature stability is good, and a large amount of workpieces that can be carried in the heat treatment furnace at a single time is a heat treatment furnace.

[0009] The embodiment of the present application provides an automated heat treatment industrial furnace, including a horizontal furnace body, a furnace door system, a carrying trolley, a lifting platform, a trolley conveying assembly located on a side of the lifting platform away from the horizontal furnace body and having a conveyor belt structure, and a trolley clamping and shifting assembly for clamping and moving the carrying trolley, the main body of which is a horizontal telescopic rod with an electric clamp positioned at the end;

[0010] A plurality of in-furnace conveying assemblies are positioned on the inner side wall of the horizontal furnace body; the in-furnace conveying assemblies are arranged in groups of two, in multiple rows, and in the same group at the same height;

[0011] The in-furnace conveying assembly is in the shape of a long strip as a whole, and a long horizontal hard plate for supporting the load-bearing trolley is fixed near the bottom of the inner side wall of the horizontal furnace body away from the inner side wall; the in-furnace conveying assembly drives the load-bearing trolley to move by pushing, and the power source for pushing the load-bearing trolley to move comes from the motor on the sliding horizontal plate;

[0012] The lifting platform is arranged close to the furnace mouth, and a sliding cross plate is slidably positioned on the top, and the sliding cross plate slides along the length direction of the horizontal furnace body; after the sliding cross plate slides toward the furnace mouth, the power of the motor on it is transmitted to the conveying assembly in the furnace through gears and ensures that the carrying trolley on the sliding cross plate moves smoothly to the horizontal hard plate.

[0013] Further, the in-furnace conveying assembly includes a carrier tube, a carrier column, a linkage belt and a horizontal hard plate;

[0014] The carrier tube is a hard square tube, arranged horizontally, one side wall of which is fixed on the inner side wall of the horizontal furnace body, and one end of which is close to the furnace mouth;

[0015] The surface of the carrier tube away from the inner side wall of the horizontal furnace body is provided with a side groove; the side groove is a through groove and is arranged horizontally;

[0016] The carrier columns are dumbbell-shaped hard columns arranged longitudinally, and there are two of them, which are arranged near the two ends of the carrier tube respectively;

[0017] At the top of the carrier tube near the furnace mouth, a driving gear that rotates coaxially with the carrier column is positioned.

[0018] The linkage belt is an annular belt body woven from steel wires, located inside the carrier tube and sleeved on two carrier columns; a row of belt body grooves is provided at a position near the middle on the side wall of the linkage belt.

[0019] The horizontally placed hard board is fixed on the carrier tube.

[0020] Furthermore, two limit side plates are fixed on the top surfaces near both sides of the sliding horizontal board, and the limit side plates are rectangular rigid board bodies.

[0021] At positions near both sides at one end of the sliding horizontal board close to the furnace door, an adapter bottom board is fixed on each; the adapter bottom board is a horizontally arranged rigid board body, and its top surface is coplanar with the top surface of the sliding horizontal board; when the sliding horizontal board slides towards the direction close to the furnace door, the adapter bottom board gradually approaches the horizontally placed hard board until it is butted against the horizontally placed hard board.

[0022] A transmission gear is positioned on the limit side plate or at a position near the furnace door on the sliding horizontal board; the transmission gear rotates driven by a gear drive assembly.

[0023] The carrying trolley is a rectangular plate-shaped trolley with wheels at positions near both sides of the bottom and a hard rod extending outward to both sides at a position near the front end on the side, and the outward-extending hard rod is matched with the linkage belt and is driven by the in-furnace conveying assembly.

[0024] Furthermore, the carrying trolley includes a carrier plate, side carrier plates, bottom wheels, and guide force side rods.

[0025] The carrier plate is a rectangular rigid board body, horizontally arranged, and is used to carry workpieces to be heat-treated; the side carrier plates are positioned on both sides of the carrier plate, and most of the side carrier plate space is located below the carrier plate, and is used to carry the bottom wheels and the guide force side rods.

[0026] The carrying bottom wheels are cylindrical wheel bodies, horizontally arranged, and there are multiple of them, rotatably connected to the side carrier plates.

[0027] The guide force side rods are rigid rod bodies, horizontally arranged, and there are two of them. One end of each is fixed on one of the side carrier plates, and the end of the guide force side rod far from the side carrier plate is far from the carrier plate; the guide force side rods are arranged near the front end of the carrying trolley.

[0028] Further, the vehicle clamping and shifting assembly is positioned on the side of the in-furnace conveying assembly away from the lifting table and is fixed to the ground by a bracket; the vehicle clamping and shifting assembly includes a horizontally arranged telescopic rod and end clamps; the horizontally arranged telescopic rod is an electric telescopic rod, a pneumatic telescopic rod or a telescopic oil cylinder, is fixed to the ground by a bracket, is higher than the vehicle-carrying conveying assembly, and has the same length direction as the sliding cross plate; the end clamps are electric or pneumatic clamps and are positioned at one end of the horizontally arranged telescopic rod close to the horizontal furnace body.

[0029] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0030] By optimizing and improving the structure of the heat treatment furnace in the prior art, a plurality of strip-shaped in-furnace conveying assemblies are added to the inner wall of the furnace body; the in-furnace conveying assembly includes a hard strip used as a guide rail and for supporting the movement of the vehicle-carrying trolley; the in-furnace conveying assembly drives the vehicle-carrying trolley to move by pushing, and the power source for pushing the vehicle-carrying trolley to move comes from the motor on the sliding cross plate; by arranging a lifting table at the furnace mouth position of the heat treatment furnace to assist the lifting of the vehicle-carrying trolley so that it can be pushed onto the hard strip in the furnace; by arranging a gear driven by a motor at the end of the lifting table close to the furnace mouth to drive the in-furnace conveying assembly to operate through power transmission and thus drive the movement of the vehicle-carrying trolley entering the furnace; when the vehicle-carrying trolley is loaded into the heat treatment furnace, it is loaded into the heat treatment furnace in multiple layers according to the height of the workpieces carried by itself, increasing the carrying capacity of the heat treatment furnace while making full use of the heat energy in the furnace; by arranging a group of stacked lifting doors at the furnace mouth position of the heat treatment furnace, the furnace mouth of the heat treatment furnace can be adjusted arbitrarily according to the height of the heat treatment workpieces therein, thereby reducing the heat loss when the workpieces enter and exit; effectively solving the technical problems in the prior art that the efficiency of loading and unloading the vehicle-carrying trolley in the heat treatment furnace is low and time-consuming and laborious, the energy consumption cost is high and the number of workpieces that can be carried in the furnace at one time is small, and the utilization rate of the space in the furnace is low; and thus realizing a heat treatment furnace for automated heat treatment industrial furnace with high efficiency and convenience in the heat treatment process, high degree of automation, short time for the vehicle-carrying trolley to enter and exit the furnace body, low energy consumption cost during the heat treatment process, good high-temperature stability, and a large number of workpieces that can be carried in the heat treatment furnace at one time. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of the automated heat treatment industrial furnace;

[0032] Figure 2 It is a schematic diagram of the positional relationship between the vehicle-carrying conveying assembly and the lifting table;

[0033] Figure 3 It is a schematic diagram of the structure of the sliding cross plate;

[0034] Figure 4 It is a schematic diagram of the structure of the vehicle-carrying trolley;

[0035] Figure 5 Schematic diagram of the positional relationship between the transmission gear and the limit side plate;

[0036] Figure 6 Schematic diagram of the structure of the horizontal furnace body and the furnace door system;

[0037] Figure 7 Schematic diagram of the structure of the furnace door system;

[0038] Figure 8 Schematic diagram of the structure of the in-furnace conveying assembly;

[0039] Figure 9 Schematic diagram of the positional relationship between the load column and the linkage belt;

[0040] Figure 10 Schematic diagram of the layout relationship of multiple workpiece-carrying carrier trolleys in the horizontal furnace body;

[0041] Figure 11 Schematic diagram of the structure of the linkage belt;

[0042] Figure 12 Schematic diagram of the positional relationship between the top door and the built-in top door;

[0043] Figure 13 Schematic diagram of the positional relationship between the centered carrier and the top door and the bottom door;

[0044] Figure 14 Schematic diagram of the positional relationship between the built-in top door, the built-in bottom door and the centered carrier.

[0045] In the figure:

[0046] Horizontal furnace body 100, chassis 110, load pipe 121, side groove 122, load column 123, driving gear 124, linkage belt 125, belt body groove 126, horizontally placed hard plate 127, top door 210, built-in top door 211, bottom door 220, side connection frame 221, built-in bottom door 222, inner door driving body 223, limit guiding wheel 230, door suspension lifting assembly 240, hoisting assembly 241, connecting pulling body 242, lifting platform 300, sliding horizontal plate 330, limit side plate 331, connecting bottom plate 332, transmission gear 340, gear driving assembly 350, carrier trolley 400, load plate 410, side load-bearing plate 420, bottom wheel 430, force guiding side rod 440, centered carrier 500, displacement motor 510, motor gear 511, motor carrier frame 520, displacement driving assembly 530, horizontally placed telescopic rod 610, end clip 620, conveyor belt assembly 710, bottom support plate 720. Detailed implementation manners

[0047] To facilitate the understanding of the present invention, the present application will be described more comprehensively with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0048] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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 of the related listed items.

[0050] Embodiment 1

[0051] As Figures 1 to 9 shown, the automated heat treatment industrial furnace of the present application includes a horizontal furnace body 100, a furnace door system, a lifting table 300, a carrying trolley 400, a trolley conveying assembly, a trolley clamping and shifting assembly, a power assembly and a control unit.

[0052] The horizontal furnace body 100 is the main body of the heat treatment furnace, which is of a hollow cylindrical or box structure, horizontally arranged, with a heating device inside, a chassis 110 fixed at the bottom, and a furnace opening at at least one end; the chassis 110 is of a cylindrical or frame structure, fixed on the ground, and supports the horizontal furnace body 100.

[0053] A plurality of in-furnace conveying assemblies are positioned on the inner side wall of the horizontal furnace body 100; the in-furnace conveying assemblies are strip-shaped, with a plurality of them, two in a group and positioned on the inner side wall of the horizontal furnace body 100 in multiple rows, and the in-furnace conveying assemblies in the same group are at the same height;

[0054] As Figure 1 , Figure 7 , Figure 8 and Figure 9 shown, the in-furnace conveying assembly includes a carrier pipe 121, a carrier column 123, a linkage belt 125 and a horizontally placed hard board 127;

[0055] The carrier pipe 121 is a rigid square pipe, horizontally arranged, one of its side walls is fixed on the inner side wall of the horizontal furnace body 100, one end is close to the furnace opening, and its total length is close to the length of the internal space of the horizontal furnace body 100;

[0056] On the surface of the carrier tube 121 away from the inner side wall of the horizontal furnace body 100, there is a side groove 122; the side groove 122 is a through groove, horizontally arranged, and the existence of the side groove 122 makes the longitudinal section of the carrier tube 121 approximately C-shaped;

[0057] The carrier columns 123 are longitudinally arranged rigid columns, integrally in a dumbbell shape (the stepped shaft shape with thick ends and thin middle), and the number is two, respectively arranged near both ends of the carrier tube 121, both located inside the carrier tube 121 and rotatably connected to the carrier tube 121 around their own axes;

[0058] At the top of the carrier tube 121 near the furnace opening, a driving gear 124 is positioned; the driving gear 124 is horizontally arranged, located at the top of the carrier tube 121 and coaxially rotates with the carrier column 123 near the furnace opening; when the driving gear 124 rotates, it drives the carrier column 123 near it to rotate;

[0059] The linkage belt 125 is an annular belt body woven by steel wires, located inside the carrier tube 121 and sleeved on the two carrier columns 123, always in a straightened state, and is propped into an oval shape by the carrier columns 123; at a position near the middle on the side wall of the linkage belt 125, there is a row of belt body grooves 126; the belt body grooves 126 are through grooves, with a length greater than 20 cm, a width greater than 3 cm, and the distance between each other less than 3 cm;

[0060] The horizontally placed hard board 127 is a long strip-shaped hard board body, horizontally arranged, used to support the carrying trolley 400, and is in direct contact with the bottom wheels 430 of the carrying trolley 400 during use; the side of the horizontally placed hard board 127 is fixed at a position near the bottom on the side wall of the carrier tube 121 away from the inner wall of the horizontal furnace body 100 or is integrally formed with the carrier tube 121 at a position near the bottom on the side wall of the carrier tube 121 away from the inner wall of the horizontal furnace body 100.

[0061] Preferably, the height difference between different groups of in-furnace conveying components is less than 40 cm.

[0062] The furnace door system is positioned at the furnace opening of the horizontal furnace body 100 for controlling the opening and closing of the furnace opening.

[0063] Further, as Figure 1 、 Figure 6 and Figure 7As shown in the figure, the furnace door system includes a top door 210, a bottom door 220, a limit guiding wheel 230, and a door suspension and lifting assembly 240; the top door 210 is a rigid plate-shaped door body and is arranged close to the furnace opening, positioned on the door suspension and lifting assembly 240 and below the door suspension and lifting assembly 240, and moves up and down (vertically) driven by the door suspension and lifting assembly 240; the bottom door 220 is a rigid plate-shaped door body, arranged close to the furnace opening, indirectly positioned on the door suspension and lifting assembly 240, below the door suspension and lifting assembly 240 and directly below the top door 210; when the top door 210 and the bottom door 220 are in contact with each other, the furnace opening is closed; side connection frames 221 are fixed on two side walls of the bottom door 220, and the side connection frames 221 are in the shape of a plate, a rod, or a frame structure, serving to connect the door suspension and lifting assembly 240 and the bottom door 220; the limit guiding wheel 230 is a cylindrical wheel body, and there are multiple of them, fixed on the horizontal furnace body 100 close to the furnace opening through rod-shaped or plate-shaped brackets, always in contact with multiple surfaces of the top door 210 and the bottom door 220, thereby restricting the moving directions of the top door 210 and the bottom door 220; the door suspension and lifting assembly 240 includes a hoisting assembly 241 and a connecting and pulling body 242; the hoisting assembly 241 is a drum structure, and rotates under the control of the control unit to wind and release the connecting and pulling body 242; the hoisting assembly 241 is fixed on the top of the horizontal furnace body 100 through a rigid bracket and is directly above the top door 210; the connecting and pulling body 242 is a steel wire rope or a belt woven by steel wires, and there are multiple of them, with the top ends positioned on the hoisting assembly 241 and the bottom ends directly or indirectly positioned on the top door 210 and the bottom door 220; the hoisting assembly 241 for driving the top door 210 to lift and the hoisting assembly 241 for driving the bottom door 220 to lift are different hoisting assemblies 241, and the top door 210 and the bottom door 220 are lifted independently.

[0064] Further, the bottom ends of some of the connecting and pulling bodies 242 are positioned on the side connection frames 221.

[0065] Further, a protective shell is covered outside the hoisting assembly 241.

[0066] As Figure 2 shown, the lifting platform 300 is a horizontally arranged platform with a lifting function, arranged close to the furnace opening, and the lifting assembly at the bottom of the lifting platform 300 is a telescopic rod structure or a scissor lift structure;

[0067] A sliding cross plate 330 is positioned at the top of the lifting platform 300; the sliding cross plate 330 is a rigid rectangular plate body, with its length direction the same as that of the horizontal furnace body 100, horizontally arranged, and slidably positioned at the top of the lifting platform 300 along its own length direction and sliding under the control of a power assembly and a control unit; the structure of the assembly for driving the sliding cross plate 330 to slide is preferably a gear-rack structure or a ball screw structure driven by a motor;

[0068] Two limit side plates 331 are fixed on the top surfaces of the sliding cross plate 330 near both sides. The limit side plates 331 are used to guide the carrying trolley 400 to move on the sliding cross plate 330 so as to prevent the carrying trolley 400 from moving obliquely; the limit side plates 331 are rectangular rigid plate bodies; the distance between the two limit side plates 331 is greater than the width of the carrying trolley 400 and less than 1.1 times the width of the carrying trolley 400;

[0069] A connecting bottom plate 332 is fixed at the positions near both sides of one end of the sliding cross plate 330 close to the furnace door; the connecting bottom plate 332 is a horizontally arranged rigid plate body, and its top surface is coplanar with the top surface of the sliding cross plate 330; when the sliding cross plate 330 slides towards the direction close to the furnace door, the connecting bottom plate 332 gradually approaches the horizontally arranged rigid plate 127 until it is butted with the horizontally arranged rigid plate 127; after the connecting bottom plate 332 is butted with the horizontally arranged rigid plate 127, the carrying trolley 400 can smoothly move from the sliding cross plate 330 to the horizontally arranged rigid plate 127;

[0070] A transmission gear 340 is positioned on the limit side plate 331 or at a position on the sliding cross plate 330 close to the furnace door; the transmission gear 340 is a horizontally arranged rigid gear and rotates under the drive of a gear drive assembly 350; when the connecting bottom plate 332 is butted with the horizontally arranged rigid plate 127, the transmission gear 340 meshes with the driving gear 124; the gear drive assembly 350 is fixed on the limit side plate 331 or the sliding cross plate 330 and is a motor controlled by the control unit.

[0071] For the convenience of description, the end of the carrying trolley 400 outside the furnace close to the furnace opening is defined as the front end here.

[0072] The carrying trolley 400 is a rectangular plate-shaped trolley with wheels at the positions near both sides of the bottom and rigid rods extending outward from both sides at the position on the side close to the front end. The outward-extending rigid rods are matched with the linkage belt 125 and are driven by the conveying assembly inside the furnace.

[0073] As Figure 4As shown in the figure, further, the carrier trolley 400 includes a carrier plate 410, side carrier plates 420, bottom wheels 430, force guiding side rods 440 and end plates; the carrier plate 410 is a rectangular rigid plate body, horizontally arranged, and is used for carrying workpieces to be heat treated; the side carrier plates 420 are positioned on both sides of the carrier plate 410, and most of the side carrier plates 420 are located below the carrier plate 410 in space, and are used for carrying the bottom wheels 430 and the force guiding side rods 440; the carrier bottom wheels 430 are cylindrical wheel bodies, horizontally arranged, and the number is multiple, and are rotatably connected to the side carrier plates 420; the force guiding side rods 440 are rigid rod bodies, horizontally arranged, and the number is two, and one end of each of them is fixed to one of the side carrier plates 420, and the end of the force guiding side rod 440 away from the side carrier plate 420 is away from the carrier plate 410; the force guiding side rods 440 are arranged near the front end of the carrier trolley 400; the end plate is a horizontally arranged rigid plate body, fixed at a position near the middle of the rear end of the carrier plate 410, and is used for facilitating the clamping and shifting assembly of the vehicle to clamp the carrier trolley 400.

[0074] The length of the sliding cross plate 330 is greater than the length of the top surface of the lifting platform 300;

[0075] The carrier vehicle conveying assembly is used for transporting the carrier trolley 400, and is located on the side of the lifting platform 300 away from the horizontal furnace body 100; the carrier vehicle conveying assembly and the horizontal furnace body 100 sandwich the lifting platform 300 in the middle; the distance between the carrier vehicle conveying assembly and the horizontal furnace body 100 is more than 1.2 times the length of the sliding cross plate 330;

[0076] The carrier vehicle conveying assembly is a conveyor belt structure, and the width direction is the same as the length direction of the sliding cross plate 330.

[0077] Further, as Figure 2 shown, the carrier vehicle conveying assembly includes a conveyor belt assembly 710 and a bottom support plate 720; the conveyor belt assembly 710 is a horizontally arranged oval conveyor belt structure; the bottom support plate 720 is positioned in the space surrounded by the belt body of the conveyor belt assembly 710, and the top surface always abuts against the belt body of the conveyor belt assembly 710, and is a rigid plate body with a horizontal and smooth top surface, and is used for improving the supporting capacity of the conveyor belt assembly 710.

[0078] The vehicle clamping and shifting assembly is used for clamping and moving the carrier trolley 400, and the main body is a horizontally arranged telescopic rod with electric clamps positioned at the end.

[0079] Further, the vehicle clamping and shifting assembly is positioned on the side of the in-furnace conveying assembly away from the lifting platform 300 and is fixed to the ground by a bracket; the vehicle clamping and shifting assembly includes a horizontally arranged telescopic rod 610 and an end clamp 620; the horizontally arranged telescopic rod 610 is an electric telescopic rod, a pneumatic telescopic rod or a telescopic oil cylinder, is fixed to the ground by a bracket, is higher than the vehicle-carrying conveying assembly, and has a length direction the same as that of the sliding cross plate 330; the end clamp 620 is an electric or pneumatic clamp and is positioned at one end of the horizontally arranged telescopic rod 610 close to the horizontal furnace body 100.

[0080] The power assembly is used to provide power for the operation of each component of the automatic heat treatment industrial furnace of the present application, and the control unit plays a role in controlling the coordinated operation of each component of the automatic heat treatment industrial furnace, which are all prior arts and will not be elaborated herein.

[0081] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0082] When the automatic heat treatment industrial furnace of the embodiment of the present application operates:

[0083] As Figure 10 shown, first, the workpieces to be heat-treated are placed on a plurality of carrier trolleys 400; then, according to the total height of the carrier trolleys 400 and the workpieces thereon, the layout of the plurality of carrier trolleys 400 in the horizontal furnace body 100 is planned and determined, so as to make full use of the space inside the furnace; control the furnace door system to open a furnace opening with an appropriate height and size according to the height of the workpiece and the target height at which the carrier trolley 400 is placed;

[0084] During the process of feeding into the furnace: use the vehicle-carrying conveying assembly to convey a plurality of carrier trolleys 400 carrying workpieces; when the carrier trolley 400 moves to a position close to the lifting platform 300, control the sliding cross plate 330 to slide so that it is close to the vehicle-carrying conveying assembly; then control the operation of the vehicle clamping and shifting assembly to push the carrier trolley 400 onto the sliding cross plate 330; after the carrier trolley 400 moves to the sliding cross plate 330, control the lifting platform 300 to move to the target height; then control the sliding cross plate 330 to slide so that the connecting bottom plate 332 is docked with the horizontal hard plate 127 and at the same time the driving gear 124 is engaged with the transmission gear 340; while continuously rotating the driving gear 124, gradually push the carrier trolley 400 into the horizontal furnace body 100; during the pushing process, the guiding side rod 440 is embedded in the belt groove 126 on the linkage belt 125; then the rotation of the linkage belt 125 will drive (push) the carrier trolley 400 into the horizontal furnace body 100 and reach the target position;

[0085] When the carrying trolley 400 needs to be taken out of the horizontal furnace body 100, it is also necessary to control the sliding cross plate 330 to move to the target height and then control the sliding of the sliding cross plate 330 so that the connecting bottom plate 332 is butted against the horizontal hard plate 127 and at the same time the driving gear 124 is engaged with the transmission gear 340; while continuously rotating the driving gear 124, gradually take out the carrying trolley 400 from the horizontal furnace body 100; finally, control the sliding cross plate 330 to carry the carrying trolley 400 to slide and move down, and finally use the vehicle clamping and shifting assembly to clamp the carrying trolley 400 and drag it onto the vehicle conveying assembly.

[0086] Preferably, as Figure 11 shown, the linkage belt 125 is in the shape of a soft ladder and is composed of spliced steel wires.

[0087] Preferably, as Figure 12 shown, in order to further reduce the heat loss during the process of the carrying trolley 400 entering and leaving the horizontal furnace body 100, an internal top door 211 is also positioned inside the top door 210; a groove with an opening downward is provided at the bottom of the top door 210, and the internal top door 211 is located in this groove; a through hole is provided at the top of the top door 210; a connecting pulling body 242 passes through the through hole and the bottom is fixed to the top of the internal top door 211, and the top is positioned on a hoisting assembly 241; when the carrying trolley 400 moves inside the horizontal furnace body 100, the internal top door 211 moves down and the bottom abuts against the top of the bottom door 220 to reduce heat loss.

[0088] The technical solutions in the above embodiments of the present application at least have the following technical effects or advantages:

[0089] It solves the technical problems in the prior art that the efficiency of the carrying trolley entering and leaving the heat treatment furnace is low, time-consuming and laborious, the energy consumption cost is high, the number of workpieces that can be carried in the furnace at one time is small, and the space utilization rate in the furnace is low; it realizes a heat treatment furnace with high efficiency and convenience in the heat treatment process of an automated heat treatment industrial furnace, high degree of automation, short time for the carrying trolley to enter and leave the furnace body, low energy consumption cost during the heat treatment process, good high-temperature stability, and a large number of workpieces that can be carried in the heat treatment furnace at one time.

[0090] Embodiment Two

[0091] In order to further improve the moving efficiency of the carrying trolley 400 inside the horizontal furnace body 100 and thus further improve the workpiece heat treatment efficiency, the embodiment of the present application adds a centering carrier 500 on the basis of the above embodiment, and realizes the simultaneous outward transportation of multiple carrying trolleys 400 located in different rows by adding a power source to the furnace internal conveying assembly; specifically:

[0092] As Figure 13As shown, the central carrier 500 is a rigid square rod, horizontally arranged, located between the top door 210 and the bottom door 220, and independently moves up and down under the drive of the door suspension and lifting assembly 240; when the bottom of the top door 210 abuts against the top of the central carrier 500 and the bottom door 220 abuts against the bottom of the central carrier 500, the furnace opening is closed.

[0093] At positions near both ends of the top of the central carrier 500, a displacement motor 510 is respectively provided; the displacement motor 510 is longitudinally arranged, and a motor gear 511 is positioned on the output shaft at the top.

[0094] On the surface of the central carrier 500 away from the furnace opening, a motor carrier 520 is fixed, and the motor carrier 520 is used to carry the displacement drive assembly 530 and the displacement motor 510.

[0095] The motor carrier 520 is a rigid rod, plate or frame structure.

[0096] The displacement drive assembly 530 is a horizontally arranged electric telescopic rod, pneumatic telescopic rod or telescopic oil cylinder, and its length direction is the same as the length direction of the horizontal furnace body 100. One end or the bottom is fixed on the motor carrier 520, and the end near the furnace opening is fixed on the displacement motor 510; the expansion and contraction of the displacement drive assembly 530 drives the displacement motor 510 to move. When it contracts, the displacement motor 510 moves away from directly above the central carrier 500. (On the premise that the motor gear 511 is at the same height as the driving gear 124), when it expands, the motor gear 511 approaches and gradually meshes with the driving gear 124.

[0097] When it is necessary to control the carrying trolley to move towards the furnace opening, the transmission gear 340 can be used to drive a row of carrying trolleys 400 to move while the motor gear 511 is used to drive a row of carrying trolleys 400 to move; after moving the carrying trolley 400 to a position close to the furnace opening, then control the motor gear 511 to disengage from the driving gear 124, and then control the central carrier 500 to move and closely abut against the bottom of the top door 210; finally, use the sliding cross plate 330 to transfer the carrying trolleys 400 to the trolley conveying assembly one by one.

[0098] Preferably, as Figure 14 shown, in order to further reduce the heat loss during the process of the carrying trolley 400 entering and leaving the horizontal furnace body 100, an inner bottom door 222 is also positioned inside the bottom door 220; a groove with an upward opening is provided at the top of the bottom door 220, and the inner bottom door 222 is located in this groove; an inner door driving body 223 for driving the inner bottom door 222 to move up and down is positioned on the bottom door 220; the inner door driving body 223 is a gear and rack structure driven by a motor; when the carrying trolley 400 moves inside the horizontal furnace body 100, the inner bottom door 222 moves up and its top abuts against the bottom of the central carrier 500, thereby reducing heat loss.

[0099] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automated heat treatment industrial furnace, comprising a horizontal furnace body (100), a furnace door system, and a carrying trolley (400), characterized in that: It further includes a lifting platform (300), a carrier vehicle conveying assembly located on one side of the lifting platform (300) far from the horizontal furnace body (100) and having a conveyor belt structure, and a vehicle clamping and shifting assembly for clamping and moving the carrier trolley (400) and having a horizontally arranged telescopic rod with electric clamps positioned at its ends as the main body; A plurality of in-furnace conveying assemblies are positioned on the inner side wall of the horizontal furnace body (100); The in-furnace conveying assemblies are arranged in groups of two and in multiple rows, and the same group is at the same height; The in-furnace conveying assembly is integrally long strip-shaped. At a position near the bottom on the side far from the inner side wall of the horizontal furnace body (100), a horizontally arranged hard board (127) which is long strip-shaped and used to support the carrier trolley (400) is fixed; The in-furnace conveying assembly drives the carrier trolley (400) to move by pushing, and the power source for pushing the carrier trolley (400) to move comes from the motor on the sliding cross board (330); The lifting platform (300) is arranged near the furnace mouth, and a sliding cross board (330) is slidably positioned on the top. The sliding cross board (330) slides along the length direction of the horizontal furnace body (100); After the sliding cross board (330) slides towards the furnace mouth, it transmits the power of the motor on itself to the in-furnace conveying assembly through gears and ensures that the carrier trolley (400) on the sliding cross board (330) smoothly moves onto the horizontal hard board (127).

2. The automated heat treatment industrial furnace according to claim 1, wherein: The in-furnace conveying assembly includes a carrier pipe (121), carrier columns (123), a linkage belt (125), and a horizontal hard board (127); The carrier pipe (121) is a rigid square pipe, horizontally arranged, with one side wall fixed to the inner side wall of the horizontal furnace body (100), and one end near the furnace mouth; On the surface of the carrier pipe (121) far from the inner side wall of the horizontal furnace body (100), a side groove (122) is provided; The side groove (122) is a through groove and is horizontally arranged; The carrier columns (123) are longitudinally arranged dumbbell-shaped rigid columns, and the number is two, which are respectively arranged near both ends of the carrier pipe (121); A driving gear (124) coaxial with the carrier column (123) is positioned on the top of the carrier pipe (121) near the furnace mouth; The linkage belt (125) is an annular belt body woven by steel wires, located inside the carrier pipe (121) and sleeved on the two carrier columns (123); A row of belt body grooves (126) is provided at a position near the middle on the side wall of the linkage belt (125); The horizontal hard board (127) is fixed to the carrier pipe (121).

3. The automated heat treatment industrial furnace according to claim 2, characterized in that: On the top surfaces near both sides of the sliding cross board (330), two limiting side plates (331) are fixed. The limiting side plates (331) are rectangular rigid board bodies; At positions near both sides at one end of the sliding cross board (330) close to the furnace door, a connecting bottom plate (332) is fixed to each; The connecting bottom plate (332) is a horizontally arranged rigid board body, and its top surface is coplanar with the top surface of the sliding cross board (330); When the sliding cross board (330) slides towards the direction close to the furnace door, the connecting bottom plate (332) gradually approaches the horizontal hard board (127) until it is butted against the horizontal hard board (127); A transmission gear (340) is positioned on the limiting side plate (331) or the sliding horizontal plate (330) at a position close to the furnace door; the transmission gear (340) rotates under the drive of the gear driving assembly (350); The carrying trolley (400) is a rectangular plate-shaped trolley with wheels provided at the bottom near both sides and hard rods extending outwards at both sides at the side near the front end. The extending hard rods match the linkage belt (125) and are driven by the conveying assembly in the furnace.

4. The automated heat treatment industrial furnace according to claim 3, wherein: The load-bearing trolley (400) comprises a load-bearing plate (410), a side load-bearing plate (420), a bottom wheel (430), and a force-guiding side rod (440); The carrier plate (410) is a rectangular hard plate body, arranged horizontally, and used to carry the workpiece that needs heat treatment; the side bearing plates (420) are positioned on both sides of the carrier plate (410), and most of the side bearing plates (420) are spatially located below the carrier plate (410) and are used to carry the bottom wheel (430) and the force-guiding side rod (440); The load-bearing bottom wheel (430) is a cylindrical wheel body, which is arranged transversely, has a plurality of wheels, and is rotatably connected to the side load-bearing plate (420); The force-guiding side rod (440) is a hard rod body, which is arranged horizontally. There are two of them, and one end of each of them is fixed on one of the side bearing plates (420). The end of the force-guiding side rod (440) away from the side bearing plate (420) is away from the carrier plate (410); the force-guiding side rod (440) is arranged close to the front end of the bearing trolley (400).

5. The automated heat treatment industrial furnace according to claim 4, characterized in that: The vehicle clamping and shifting assembly is positioned on a side of the in-furnace conveying assembly away from the lifting platform (300) and is fixed to the ground by a bracket; the vehicle clamping and shifting assembly includes a transverse telescopic rod (610) and an end clamp (620); the transverse telescopic rod (610) is an electric telescopic rod, a pneumatic telescopic rod or a telescopic cylinder, which is fixed to the ground by a bracket, is higher than the vehicle conveying assembly, and has the same length direction as the sliding cross plate (330); the end clamp (620) is an electric or pneumatic clamp, which is positioned at one end of the transverse telescopic rod (610) close to the horizontal furnace body (100).

6. A suspension heat treatment furnace door system, characterized in that: It comprises a top door (210), a bottom door (220), a position-limiting guide wheel (230) and a door suspension lifting assembly (240); The top door (210) is positioned on a door suspension lifting assembly (240); The bottom door (220) is a hard plate-shaped door body, arranged close to the furnace mouth, and indirectly positioned on the door suspension lifting assembly (240), located below the door suspension lifting assembly (240) and directly below the top door (210); When the top door (210) and the bottom door (220) collide with each other, the furnace opening is closed; The limiting guide wheel (230) is a cylindrical wheel body, and there are multiple of them, which are fixed on the horizontal furnace body (100) near the furnace mouth through a rod-shaped or plate-shaped bracket, and always contact multiple surfaces of the top door (210) and the bottom door (220), thereby limiting the movement direction of the top door (210) and the bottom door (220); The door suspension lifting assembly (240) is a winch structure, used to drive the top door (210) and the bottom door (220) to move up and down by dragging.

7. The hanging heat treatment furnace door system according to claim 6, wherein: An inner top door (211) is also positioned inside the top door (210); A groove with an opening downward is provided at the bottom of the top door (210), and the inner top door (211) is located in this groove; a through hole is provided at the top of the top door (210); A connecting and pulling body (242) passes through the through hole and its bottom is fixed to the top of the inner top door (211), and its top is positioned on a hoisting assembly (241); when the carrying trolley (400) moves inside the horizontal furnace body (100), the inner top door (211) moves downward and its bottom abuts against the top of the bottom door (220) to reduce heat loss.

8. The hanging heat treatment furnace door system according to claim 6, characterized in that: It further includes a centering carrier (500); the centering carrier (500) is a rigid square rod, horizontally arranged, located between the top door (210) and the bottom door (220), and independently moves up and down under the drive of the door suspension and lifting assembly (240); At positions near both ends of the top of the centering carrier (500), a displacement motor (510) is respectively provided; a motor gear (511) is positioned on the output shaft at the top of the displacement motor (510); A motor carrier (520) is fixed on the surface of the centering carrier (500) away from the furnace mouth; The displacement driving assembly (530) is a horizontally arranged electric telescopic rod, pneumatic telescopic rod or telescopic oil cylinder, and its length direction is the same as the length direction of the horizontal furnace body (100), one end or the bottom is fixed on the motor carrier (520), and the end near the furnace mouth is fixed on the displacement motor (510); the expansion and contraction of the displacement driving assembly (530) drives the displacement motor (510) to move. When it contracts, the displacement motor (510) moves away from directly above the centering carrier (500), and when it expands, the motor gear (511) approaches and gradually meshes with the driving gear (124).

9. The hanging heat treatment furnace door system according to claim 8, wherein: An inner bottom door (222) is also positioned inside the bottom door (220); A groove with an opening upward is provided at the top of the bottom door (220), and the inner bottom door (222) is located in this groove; An inner door driving body (223) for driving the inner bottom door (222) to move up and down is positioned on the bottom door (220); The inner door driving body (223) is a gear and rack structure driven by a motor; When the carrying trolley (400) moves inside the horizontal furnace body (100), the inner bottom door (222) moves upward and its top abuts against the bottom of the centering carrier (500) to further reduce heat loss.

10. An automated heat treatment industrial furnace, characterized in that: It includes a horizontal furnace body (100), a furnace door system, a carrying trolley (400), and further includes a lifting platform (300), a trolley conveying assembly, and a trolley clamping and displacing assembly; the structures of the horizontal furnace body (100), the carrying trolley (400), the lifting platform (300), the trolley conveying assembly, and the trolley clamping and displacing assembly are the same as those of the automatic heat treatment industrial furnace described in claim 5; the structure of the furnace door system is the same as that of the suspended heat treatment furnace door system described in any one of claims 6 to 9.

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