Heat treatment furnace and heat preservation furnace door system thereof

Abstract

The invention discloses a heat treatment furnace and a heat preservation furnace door system thereof, and relates to the technical field of heat treatment equipment.The heat treatment furnace in the prior art is optimized and improved, and a plurality of in-furnace guide rail strips which are horizontally arranged and used as moving guide rails of a bearing trolley are additionally arranged on the furnace wall of the heat treatment furnace; 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; a lifting platform is arranged at a furnace opening of the heat treatment furnace to assist the bearing trolley in lifting so that the bearing trolley can be pushed onto in-furnace guide rail strips. The technical effects that in the heat treatment process of the heat treatment furnace, the energy consumption cost is low, the high-temperature stability is good, the number of workpieces capable of being borne in the furnace at a time is large, and the service life is relatively long are achieved.

Description

Technical Field

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

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

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

[0004] In order to be suitable for 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 of this heat treatment furnace, 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, the bottom of the heat treatment furnace body is through-opened, the four side walls and the top of the furnace body are all provided with a refractory and heat-insulating furnace lining, and a 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 a trolley inside the furnace body, and the edge of the trolley is matched with the gap of the furnace lining when the trolley is lifted inside the furnace body; a distance meter is also provided on the top of the furnace body for measuring the distance between the upper surface of the trolley and the furnace top, which can flexibly adjust the lifting height of the trolley according to the specific workpiece size without heating the entire furnace body, thereby reducing heat treatment energy consumption, optimizing energy configuration, and reducing energy consumption costs.

[0005] Although the above scheme reduces the energy consumption of heat treatment to a certain extent and thus reduces the energy consumption cost, its carrying capacity for heat-treated workpieces is poor, and the number of workpieces that can be processed at a single time is 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, which is not conducive to promotion.

[0006] Therefore, a heat treatment furnace is needed which has low energy consumption cost during the heat treatment process, good high-temperature stability, can carry a large number of workpieces in a single heat treatment furnace, and has a relatively long service life. Summary of the invention

[0007] The embodiment of the present application solves the technical problems in the prior art that the heat treatment furnace has high energy consumption cost and can carry a small number of workpieces at a time by providing a heat treatment furnace; and achieves the technical effects that the heat treatment furnace has low energy consumption cost during the heat treatment process, good high-temperature stability, can carry a large number of workpieces at a time in the furnace and has a relatively long service life.

[0008] The embodiment of the present application provides a heat treatment furnace, including a horizontal furnace body, a furnace door system positioned on a furnace opening of the horizontal furnace body and used to control the opening and closing of the furnace opening, a carrying trolley, and a carrying lifting platform;

[0009] The horizontal furnace body 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 at least one end;

[0010] A plurality of furnace guide rails are fixed on the inner side wall of the horizontal furnace body;

[0011] The guide rails in the furnace are used to support the trolley and guide the movement of the trolley. The number of the guide rails is even and they are arranged in two rows on the inner side wall of the horizontal furnace body, with two in each group. The heights of the guide rails in the same group are equal.

[0012] The load-bearing trolley is a rectangular trolley that serves to carry workpieces, and a plurality of wheels are provided at the bottom near the edge; a horizontally arranged end fixing ring is fixed at the rear end of the load-bearing trolley;

[0013] The load-bearing lifting platform is used to assist the load-bearing trolley to enter and exit the horizontal furnace body, is positioned on the ground and arranged close to the furnace mouth, and is a lifting trolley.

[0014] Further, the furnace door system includes a top lift door, a door lifting assembly, a bottom lift door and a lift drive assembly;

[0015] The top lifting door is a hard plate-shaped door panel arranged longitudinally, which is slidably positioned on the furnace mouth and is lifted and lowered under the drive of the door lifting assembly; the door lifting assembly is fixed on the horizontal furnace body and is a winch structure, which lifts the top lifting door by pulling;

[0016] The bottom lifting door is located directly below the top lifting door, is a longitudinally arranged hard plate-shaped door panel, is slidably positioned on the furnace mouth and is lifted and lowered under the drive of the lifting drive assembly; the structure of the lifting drive assembly is a gear rack structure driven by a motor; when the top lifting door and the bottom lifting door move away from each other, the furnace door opens, and when the two are in contact, the furnace door closes.

[0017] Furthermore, the load-bearing trolley includes a trolley body, a side wheel group and a bottom wheel group; the trolley body is a horizontally arranged hard plate body, which plays a load-bearing role; the side wheel group includes more than 4 side wheels; the side wheels are a combination of longitudinally arranged hard cylindrical wheels, which are located on both sides of the trolley body and rotate around their own axes to reduce the collision impact between the load-bearing trolley and the horizontally placed furnace body and the load-bearing lifting platform, thereby improving the stability of the movement of the load-bearing trolley; the bottom wheel group includes multiple bottom wheels; the bottom wheels are transversely arranged hard cylindrical wheels, which are positioned at the bottom of the trolley body close to both sides; when moving in the horizontally placed furnace body, they roll over the guide rails in the furnace.

[0018] Preferably, it also includes a driving trolley, wherein the top of the trolley is provided with a plurality of lifting holes, lifting ears or iron blocks for the electromagnetic crane to adsorb;

[0019] The driving trolley is generally plate-shaped, arranged horizontally, and is provided with wheels at the bottom and sides. It travels driven by a motor and is provided with an electric clamp at one end. It is normally located at the top of the load-bearing lifting platform. When the load-bearing trolley needs to be placed in or taken out, it is controlled to clamp the load-bearing trolley and transfer the load-bearing trolley to the target position; after the load-bearing trolley is dragged to the load-bearing lifting platform, the load-bearing trolley is lifted and transferred using lifting equipment.

[0020] Preferably, the driving vehicle comprises a base vehicle, a side load block, a combination rod, a limit compression spring, an end clamp, a load block shifting assembly and a side wheel driving assembly;

[0021] The basic vehicle is a horizontally arranged rectangular hard plate;

[0022] Both sides of the basic vehicle are provided with a plurality of insertion holes for the combination rods to pass through; the combination rods pass through the insertion holes and are slidably positioned on the insertion holes;

[0023] The side load block is a hard rectangular plate, horizontally arranged, with the length direction perpendicular to the axial direction of the penetration hole, and there are two of them, which are symmetrically arranged and located on both sides of the base vehicle; a bottom wheel group is provided at the bottom of the side load block, and a side wheel group is provided on the side wall away from the base vehicle;

[0024] The combination rods are arranged transversely, the number is 4 or more, corresponding to the penetration holes one by one, and one end is fixed on the side wall of the side load block close to the base vehicle;

[0025] The limit compression spring corresponds to the combination rod one by one, is sleeved on the combination rod, and has two ends respectively against the side load block and the base load vehicle;

[0026] The end clamp is an electric clamp fixed on one side of the base vehicle close to the horizontal furnace door;

[0027] The load block shifting assembly is a winch structure, which is used to control the distance between the side load block and the base vehicle and thus control the overall size of the driving vehicle;

[0028] The side wheel drive assembly is positioned on the top of the base vehicle and is a combination of a motor and a chain drive structure, and is used to drive the rotation of the side wheel group on the side load block.

[0029] Preferably, the diameter of the penetration hole is larger than the diameter of the combination rod by more than 0.8 cm; the number of combination rods is 4, two of which are arranged near the front end of the driving trolley, and the other two are arranged near the rear end of the driving trolley; the front end and the rear end of the driving trolley are both provided with side wheel groups; the number of the carrier block shifting assemblies is two, which are respectively arranged near the front and the rear end of the driving trolley; the side wheel groups on the driving trolley all rotate under the drive of the side wheel driving assemblies; when the driving trolley is transferred from the carrying lifting platform to the horizontal furnace body, the driving trolley can be deformed by controlling the two carrier block shifting assemblies to run successively, thereby assisting the driving trolley to smoothly and conveniently cross the gap between the carrying lifting platform and the guide rails in the furnace.

[0030] Preferably, the driving vehicle is provided with a water cooling system;

[0031] The water cooling system on the driving vehicle comprises a detachable water tank; the detachable water tank is detachable, and the detachable water tank or the coolant inside the detachable water tank or the coolant inside the detachable water tank is replaced once each time the driving vehicle enters the horizontal furnace body.

[0032] Preferably, a winch assembly and a connection block are also positioned on the driving vehicle;

[0033] The hoisting assembly is a combination of a rope reel and a steel wire rope. The rope reel is positioned on the top of the vehicle body and rotates under the drive of the motor. One end of the steel wire rope is wound around the rope reel and the other end is fixed to the end of the end clamp close to the vehicle body after passing through the connecting block.

[0034] The connecting block is a hard block, which is located on the top of the cart body and is arranged near the front end of the cart body; the end clamp is not fixed on the cart body; under normal conditions, the end clamp is pulled by the winch assembly to resist the connecting block;

[0035] When the carrying trolley needs to be towed out, the driving trolley is controlled to quickly approach the carrying trolley, and then the control end clip is fixed on the carrying trolley that needs to be towed out; thereafter, the driving trolley is controlled to quickly leave the furnace, and at the same time, the winch assembly is controlled to operate to release the wire rope; after the driving trolley reaches outside the furnace, the winch assembly is controlled to operate to reel in the wire rope, and the carrying trolley is pulled out stably.

[0036] Preferably, the driving vehicle uses an expansion rod to drag multiple carrying trolleys at one time to a position near the furnace door in the furnace;

[0037] The end fixing ring is a long strip ring body;

[0038] The expansion rod is a long hard rod, which is clamped and fixed on the end clamp;

[0039] The end clamp is rotatably connected to the front end of the cart body and rotates under the drive of the motor, and the axial direction of the rotating shaft is parallel to the ground;

[0040] When multiple trolleys in the same row need to be dragged out at one time, first fix the expansion rod on the end clamp; then control the driving trolley to enter the horizontal furnace body along the guide rail in the furnace; when approaching the trolley that needs to be dragged out, control the end clamp to rotate and drive the expansion rod to rotate so that it is inserted into the end fixing ring; then control the driving trolley to drag the corresponding trolley to a position close to the furnace mouth, so as to continue to drag out the horizontal furnace body.

[0041] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0042] By optimizing and improving the heat treatment furnace in the prior art, a plurality of horizontally arranged furnace guide rails are added to the furnace wall thereof to serve as movable guide rails for the load-bearing trolley; when the load-bearing 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 workpiece it carries, thereby increasing the load capacity of the heat treatment furnace and making full use of the heat energy in the furnace; a lifting platform is provided at the furnace mouth of the heat treatment furnace to assist the lifting of the load-bearing trolley so that it can be pushed onto the furnace guide rails; a group of stacked lifting doors are provided at the furnace mouth of the heat treatment furnace so that the furnace mouth of the heat treatment furnace can be adjusted in size according to the height of the workpiece to be heat treated therein, thereby reducing the heat loss when the workpiece enters and exits; the technical problems of high energy consumption cost and small amount of workpieces that can be carried at a single time of the heat treatment furnace in the prior art are effectively solved; thereby achieving the technical effects of low energy consumption cost, good high-temperature stability, large amount of workpieces that can be carried at a single time in the heat treatment process of the heat treatment furnace, and relatively long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of the heat treatment furnace of this application;

[0044] Figure 2 It is a schematic diagram of the positional relationship between the horizontal furnace body and the top lift door and the bottom lift door;

[0045] Figure 3 This is a schematic diagram of the appearance and structure of the heat treatment furnace of this application;

[0046] Figure 4 It is a schematic diagram of the positional relationship between the top lift door and the bottom lift door and the guide rails in the furnace;

[0047] Figure 5 It is a schematic diagram of the position relationship between the load-bearing lifting platform and the load-bearing trolley;

[0048] Figure 6 This is a schematic diagram of the bottom structure of the load-bearing trolley;

[0049] Figure 7 This is a schematic diagram of the appearance structure of the guide rail in the furnace;

[0050] Figure 8 This is a schematic diagram of the appearance of the driving vehicle;

[0051] Fig. 9 It is a schematic diagram of the positional relationship between the disassembly and assembly robot arm and the driving vehicle;

[0052] Fig.10 It is a schematic diagram of the positional relationship between the winch assembly and the end clamp;

[0053] Fig.11 It is a schematic diagram of the positional relationship between the end fixing ring and the main body of the cart;

[0054] Fig.12 Schematic diagram of the positional relationship between the expansion rod and the end clamp.

[0055] In the figure:

[0056] A horizontal furnace body 100, a base frame 101, a furnace guide rail 110, a top lifting door 210, a bottom lifting door 220, a horizontal platform 310, a bottom support body 320, a cart body 410, a side wheel group 420, a bottom wheel group 430, an end fixing ring 440, a basic carrier 510, a side load block 520, a combination rod 530, a limit compression spring 540, an end clamp 550, an expansion rod 551, a reel 561, a pull rope 562, a side wheel drive assembly 570, a detachable water tank 581, a disassembly and assembly robotic arm 600, a water exchange tank 610, a connecting block 800, and a winch assembly 900. DETAILED DESCRIPTION

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Example 1

[0061] As Figures 1 to 5 shown, the heat treatment furnace of the present application includes a horizontally arranged furnace body 100, a furnace door system, a carrying lifting platform, a carrying trolley, a power assembly, and a control unit.

[0062] The horizontally arranged furnace body 100 is the main body of the heat treatment furnace, which is a hollow cylindrical or box structure, arranged horizontally, with a built-in heating device, a chassis 101 fixed at the bottom, and at least one end provided with a furnace opening; the chassis 101 is a cylindrical or frame structure, fixed on the ground, and supports the horizontally arranged furnace body 100;

[0063] A plurality of in-furnace guide bars 110 are fixed on the inner side wall of the horizontally arranged furnace body 100;

[0064] The in-furnace guide bars 110 are used to support the carrying trolley and guide the movement of the carrying trolley. The number of them is an even number, arranged in two columns on the inner side wall of the horizontally arranged furnace body 100, with every two as a group. The in-furnace guide bars 110 in the same group have the same height and are parallel to each other; the in-furnace guide bars 110 are hard metal bars, and the length is more than 0.8 times the total length of the horizontally arranged furnace body 100. The longitudinal section is in the shape of a straight line, a square, an I-shape, an L-shape, or a C-shape; during use, one of the surfaces of the in-furnace guide bars 110 parallel to the horizontal ground contacts the bottom wheels of the carrying trolley.

[0065] Further, as Figure 7 shown, the surface of the in-furnace guide bars 110 that contacts the carrying trolley is rough (sealed patterns, protrusions, and / or grooves) to prevent slipping.

[0066] Preferably, the distance between each group of in-furnace guide bars 110 is 30 to 50 centimeters.

[0067] The furnace door system is positioned at the furnace opening of the horizontally arranged furnace body 100 and is used to control the opening and closing of the furnace opening;

[0068] The furnace door system includes a top lifting door 210, a door lifting assembly, a bottom lifting door 220, and a lifting drive assembly;

[0069] The top lifting door 210 is a hard plate-shaped door panel arranged longitudinally, slidably positioned at the furnace opening, and lifted and lowered under the drive of the door lifting assembly; the door lifting assembly is fixed on the horizontally arranged furnace body 100, is a winch structure, and lifts the top lifting door 210 by pulling;

[0070] The bottom lifting door 220 is located directly below the top lifting door 210, and is a longitudinally arranged hard plate-shaped door panel, which is slidably positioned on the furnace mouth and is lifted and lowered under the drive of the lifting drive assembly; the structure of the lifting drive assembly is a gear rack structure driven by a motor; when the top lifting door 210 and the bottom lifting door 220 move away from each other, the furnace door opens, and when the two are in contact, the furnace door is closed.

[0071] The load-bearing lifting platform is used to assist the load-bearing trolley in and out of the horizontal furnace body 100, and is positioned on the ground and arranged close to the furnace mouth;

[0072] The load-bearing lifting platform is a lifting trolley.

[0073] Furthermore, the load-bearing lifting platform includes a transverse platform 310 and a bottom support body 320; the transverse platform 310 is a transverse hard rectangular plate, which is arranged close to the furnace door; the bottom of the bottom support body 320 is positioned on the ground, and the top is positioned at the bottom of the transverse platform 310, which is a telescopic rod structure or a scissors-type lifting structure.

[0074] Furthermore, side panels are fixed on the transverse platform 310. The side panels are longitudinally arranged, two in number, fixed on both side edges of the transverse platform 310, and have the same length direction as the length direction of the guide rail 110 in the furnace, thereby serving as guardrails and guides.

[0075] The carrying trolley is a rectangular flatbed trolley that serves to carry workpieces. A plurality of wheels are provided at the bottom near the edge. The existence of the wheels enables the carrying trolley to move on the carrying lifting platform and the guide rails 110 in the furnace. An end fixing ring 440 is fixed to the rear end of the carrying trolley (the end near the furnace door that enters the horizontal furnace body 100). The end fixing ring 440 is a horizontally arranged hard ring body that is fixed in the middle position of the end of the carrying trolley, and is used to facilitate the use of a hook to hook the carrying trolley and thereby assist the carrying trolley in moving (pushing in and pulling out).

[0076] Furthermore, the surface of the wheel body is rough.

[0077] Preferably, end fixing rings 440 are fixed to both the front and rear ends of the load-bearing trolley.

[0078] Further, such as Figure 6As shown, the load-bearing trolley includes a trolley body 410, a side wheel group 420 and a bottom wheel group 430; the trolley body 410 is a horizontally arranged hard plate body, which plays a load-bearing role; the side wheel group 420 includes more than 4 side wheels; the side wheels are a combination of longitudinally arranged hard cylindrical wheels, which are located on both sides of the trolley body 410 and rotate around their own axes to reduce the collision impact between the load-bearing trolley and the horizontally placed furnace body 100 and the load-bearing lifting platform, thereby improving the stability of the movement of the load-bearing trolley; the bottom wheel group 430 includes a plurality of bottom wheels; the bottom wheels are horizontally arranged hard cylindrical wheels, which are positioned at the bottom of the trolley body 410 close to both sides; when moving in the horizontally placed furnace body 100, they roll over the guide rails 110 in the furnace.

[0079] The power assembly is used to provide power for the operation of the various components of the heat treatment furnace of the present application, and the control unit plays a role in controlling the coordinated operation of the various components of the heat treatment furnace. Both are prior arts and will not be elaborated here.

[0080] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0081] When the heat treatment furnace of the embodiment of the present application is used:

[0082] First, the workpieces that need heat treatment are placed on multiple carrying carts; then, the layout of the multiple carrying carts in the horizontal furnace body 100 is planned and determined based on the total height of the carrying carts and the workpieces thereon, so as to make full use of the space in the furnace; the furnace door system is controlled to open a furnace opening of appropriate height and size based on the height of the workpieces and the target height for placing the carrying carts; the carrying cart carrying the workpieces is placed on the carrying lifting platform; the end fixing ring 440 is hooked with a hook with a long rod to push the carrying cart to the target layout position; after heat treatment, the furnace door system is controlled to open a furnace opening of appropriate height and size based on the position of the carrying cart and the height of the workpiece thereon; then the end fixing ring 440 is hooked with a hook with a long rod to pull the carrying cart out.

[0083] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0084] The invention solves the technical problems in the prior art that the heat treatment furnace has high energy consumption cost and can carry a small number of workpieces at a time; and achieves the technical effects that the heat treatment furnace has low energy consumption cost during the heat treatment process, good high-temperature stability, can carry a large number of workpieces at a time in the furnace and has a relatively long service life.

[0085] Embodiment 2

[0086] Considering that there are certain technical difficulties in using a hook with a long rod to hook the end fixing ring 440 to push the load-bearing trolley to the target arrangement position and using a hook with a long rod to hook the end fixing ring 440 to pull the load-bearing trolley out, the operation difficulty and labor intensity are relatively large, and it is difficult to realize the automatic operation of the entire equipment; therefore, the embodiment of the present application adds a driving trolley on the basis of the above embodiment, and sets a plurality of lifting holes, lifting ears or iron blocks for the electromagnetic crane to adsorb on the top of the load-bearing trolley, and uses a motor to drive the driving trolley to run and then drive the load-bearing trolley to transfer, specifically:

[0087] like Figure 8 As shown, the driving trolley is overall plate-shaped, arranged horizontally, and is provided with wheels at the bottom and sides. It travels driven by a motor, and is provided with an electric clamp at one end. It is normally located on the top of the load-bearing lifting platform. When the load-bearing trolley needs to be put in or taken out, it is controlled to clamp the load-bearing trolley and transfer the load-bearing trolley to the target position; after the load-bearing trolley is dragged to the load-bearing lifting platform, the load-bearing trolley is lifted and transferred by a lifting equipment (the movement of the load-bearing trolley to the load-bearing lifting platform also depends on the lifting equipment).

[0088] Further, the driving vehicle includes a base vehicle 510, a side load block 520, a combination rod 530, a limit compression spring 540, an end clamp 550, a load block shifting assembly and a side wheel driving assembly 570;

[0089] The basic carrier 510 is a horizontally arranged rectangular hard plate body, which plays a bearing role;

[0090] Both sides of the base vehicle 510 are provided with a plurality of insertion holes for the combination rods 530 to pass through; the combination rods 530 pass through the insertion holes and are slidably positioned on the insertion holes; the axial direction of the insertion holes is perpendicular to the length direction of the horizontal furnace body 100;

[0091] The side load block 520 is a hard rectangular plate, which is horizontally arranged, and the length direction is perpendicular to the axial direction of the penetration hole. There are two side load blocks 520, which are symmetrically arranged and located on both sides of the base vehicle 510. The bottom of the side load block 520 is provided with a bottom wheel group 430, and the side wall away from the base vehicle 510 is provided with a side wheel group 420;

[0092] The combination rods 530 are rigid straight rods, which are arranged transversely, and the number is 4 or more, corresponding to the insertion holes one by one; one end of the combination rods 530 is fixed to the side wall of the side load block 520 close to the base vehicle 510;

[0093] The limit compression spring 540 is used to accumulate and release elastic potential energy to assist the movement of the side load block 520. It is a metal compression spring, corresponding to the combination rod 530 one by one, and is sleeved on the combination rod 530. The two ends of the limit compression spring 540 respectively contact the side load block 520 and the base vehicle 510, and are always in a compressed state.

[0094] The end clamp 550 is an electric clamp, fixed to the side of the base carrier 510 close to the furnace door of the horizontal furnace body 100, and is used to clamp and fix the end fixing ring 440 in time;

[0095] The load block shifting assembly is a winch structure, which is used to control the distance between the side load block 520 and the base vehicle 510 and thus control the overall size of the driving vehicle;

[0096] Furthermore, the load block shifting assembly includes a drum 561 and a pull rope 562; the drum 561 is positioned on the top of the base vehicle 510, and is driven by a motor to roll up and release the pull rope 562; the pull rope 562 is a steel wire rope, and there are two of them, one end of each of which is wound around the drum 561, and the other end is positioned on one of the side load blocks 520;

[0097] The contact surface between the side plate and the side wheel set 420 supporting the vehicle is coplanar with the contact surface between the side wheel set 420 and the guide rail 110 in the furnace;

[0098] The side wheel drive assembly 570 is positioned on the top of the base vehicle 510 and is a combination of a motor and a chain drive structure, and is used to drive the rotation of the side wheel group 420 on the side load block 520.

[0099] The distance between the side plate and the guide rail 110 in the furnace is less than 25 cm, and the distance between adjacent wheels constituting the side wheel set 420 located on the same side of the side load block 520 is greater than 32 cm;

[0100] During the process of driving the vehicle to move, the force of the side wheel group 420 on the side carrier block 520 against the guide rail 110 and the side plate in the furnace can be adjusted by controlling the operation of the carrier block shifting assembly to adjust the driving force (increase the friction force).

[0101] For the convenience of description, the side of the driving trolley provided with the end clamp 550 is defined as the front end; preferably, the diameter of the insertion hole is larger than the diameter of the combination rod 530 by more than 0.8 cm; the number of the combination rods 530 is 4, of which two are arranged near the front end of the driving trolley, and the other two are arranged near the rear end of the driving trolley; the front end and the rear end of the driving trolley are both provided with side wheel groups 420; the number of the carrier block shifting assemblies is two, which are respectively arranged near the front section and the rear end of the driving trolley; the side wheel groups 420 on the driving trolley are all driven by the side wheel driving assemblies 570 to rotate; when the driving trolley is transferred from the carrying lifting platform to the horizontal furnace body 100, the driving trolley can be deformed (deformed into a cross-section approximately trapezoidal) by controlling the two carrier block shifting assemblies to run successively, thereby assisting the driving trolley to smoothly and conveniently cross the gap between the carrying lifting platform and the guide rail 110 in the furnace.

[0102] Preferably, in order to further reduce the heat loss of the heat treatment furnace during use and thereby achieve further energy saving, after the vehicle is driven into the horizontal furnace body 100, the distance between the top lifting door 210 and the bottom lifting door 220 is controlled to be less than 3 cm.

[0103] Preferably, both the motor on the driving vehicle and the electric clamp are provided with a heat insulation layer for protecting the electronic components on the driving vehicle.

[0104] Preferably, a water cooling system is provided on the driving vehicle.

[0105] Preferably, in order to speed up the cooling efficiency of the coolant, the water cooling system on the driving vehicle includes a detachable water tank 581; the detachable water tank 581 is detachable, and the driving vehicle enters the horizontal furnace body 100 once, and the detachable water tank 581 or the coolant therein is replaced as a whole once, thereby ensuring the cooling effect.

[0106] Furthermore, the water inlet and outlet of the detachable water tank 581 are both provided with a one-way valve.

[0107] Preferably, Fig. 9 As shown, the detachable water tank 581 is detachably fixed to the driving vehicle by an electric buckle; the heat treatment furnace of the present application also includes a disassembly and assembly robot arm 600 for replacing the detachable water tank 581 and a water exchange tank 610 for replacing the coolant in the detachable water tank 581 as a whole; the disassembly and assembly robot arm 600 and the water exchange tank 610 are both located on one side of the carrying lifting platform; the disassembly and assembly robot arm 600 is a multi-degree-of-freedom robot with an electric clamp at the arm head, which is a prior art and will not be described in detail here. It is used to replace manual clamping and fixing of the detachable water tank 581 and then moving it back. Move the detachable water tank 581 to dock it with the water outlet of the water exchange tank 610; the water inlet of the detachable water tank 581 is at the top, and the water outlet is at the bottom; the water exchange tank 610 is a water tank with a built-in pump body, which acts as a container, and its water outlet matches the water inlet of the detachable water tank 581; when the water in the detachable water tank 581 needs to be replaced as a whole, first release the fixation of the detachable water tank 581, and then control the disassembly and assembly robot arm 600 to remove the detachable water tank 581 and dock it with the water exchange tank 610, and pump in new coolant while squeezing out the old coolant.

[0108] Embodiment 3

[0109] In order to reduce the thermal damage of the driving vehicle during use, reduce its operating time in the furnace while ensuring the stable pulling out of the carrying vehicle, and extend its service life, thereby reducing the overall maintenance cost, the embodiment of the present application further optimizes and improves the structure of the driving vehicle, specifically:

[0110] like Fig.10 As shown, a winch assembly 900 and a connection block 800 are also positioned on the driving vehicle;

[0111] The hoist assembly 900 is a combination of a rope reel and a steel wire rope. The rope reel is positioned at the top of the cart body 410 and rotates under the drive of the motor. One end of the steel wire rope is wound around the rope reel, and the other end passes through the connecting block 800 and is fixed to the end of the end clamp 550 close to the cart body 410.

[0112] The connecting block 800 is a hard block, which is located on the top of the cart body 410 and is arranged close to the front end of the cart body 410; the end clamp 550 is not fixed on the cart body 410; under normal circumstances, the end clamp 550 is pulled by the winch assembly 900 and contacts the connecting block 800.

[0113] When the carrying trolley needs to be towed out, the driving trolley is controlled to quickly approach the carrying trolley, and then the control end clip 550 is fixed on the carrying trolley that needs to be towed out; thereafter, the driving trolley is controlled to quickly leave the furnace, and at the same time, the winch assembly 900 is controlled to run to release the wire rope; after the driving trolley reaches outside the furnace, the winch assembly 900 is controlled to run to reel in the wire rope to stably pull the carrying trolley out.

[0114] Furthermore, during the process of gradually pulling out the carrying trolley, only a gap is left between the top lifting door 210 and the bottom lifting door 220 for the wire rope to pass through.

[0115] Embodiment 4

[0116] like Fig.11 and Fig.12 As shown, in order to improve efficiency, in the embodiment of the present application, the driving vehicle uses the expansion rod 551 to drag multiple carrying vehicles out of the furnace at one time to a position near the furnace door; the end fixing ring 440 is a long strip ring body; the expansion rod 551 is a hard long rod, which is clamped and fixed on the end clamp 550;

[0117] The end clamp 550 is rotatably connected to the front end of the cart body 410 and is rotated by the motor, with the axial direction of the rotating shaft being parallel to the ground.

[0118] When multiple load-bearing carts located in the same row need to be dragged out at one time, first fix the expansion rod 551 on the end clamp 550; then control the driving of the load-bearing cart along the guide rail 110 in the furnace to enter the horizontal furnace body 100; when it is close to the load-bearing cart that needs to be dragged out (located between the load-bearing carts that need to be dragged out), control the end clamp 550 to rotate and drive the expansion rod 551 to rotate so that it is inserted into the end fixing ring 440; then control the driving of the load-bearing cart to drag the corresponding load-bearing cart to a position close to the furnace mouth, so as to continue to drag out the horizontal furnace body 100 later.

[0119] 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. A heat treatment furnace, comprising a horizontal furnace body (100), a furnace door system positioned on a furnace opening of the horizontal furnace body (100) and used to control the opening and closing of the furnace opening, and a carrying trolley, characterized in that: It also includes a load-bearing lifting platform; The horizontal furnace body (100) is the main body of the heat treatment furnace, is a hollow column or box structure, is arranged horizontally, has a built-in heating device, has a bottom frame (101) fixed at the bottom, and has a furnace opening at at least one end; A plurality of furnace guide rails (110) are fixed on the inner side wall of the horizontal furnace body (100); The furnace guide rails (110) are used to support the load-bearing trolley and guide the movement of the load-bearing trolley. The number of the guide rails (110) is even and they are arranged in two rows on the inner side wall of the horizontal furnace body (100), with two in each group. The furnace guide rails (110) in the same group have the same height. The carrying trolley is a rectangular trolley that serves to carry workpieces, and a plurality of wheels are provided at the bottom near the edge; a horizontally arranged end fixing ring (440) is fixed at the rear end of the carrying trolley; The load-bearing lifting platform is used to assist the load-bearing trolley in entering and exiting the horizontal furnace body (100), is positioned on the ground and arranged close to the furnace mouth, and is a lifting trolley.

2. The heat treatment furnace and the heat preservation furnace door system thereof according to claim 1, characterized in that: The furnace door system comprises a top lift door (210), a door lifting assembly, a bottom lift door (220) and a lift drive assembly; The top lifting door (210) is a hard plate-shaped door panel arranged longitudinally, slidably positioned on the furnace mouth and lifted and lowered under the drive of the door lifting assembly; the door lifting assembly is fixed on the horizontal furnace body (100) and is a winch structure, which lifts the top lifting door (210) by pulling; The bottom lifting door (220) is located directly below the top lifting door (210) and is a hard plate-shaped door panel arranged longitudinally, slidably positioned on the furnace mouth and lifted and lowered under the drive of the lifting drive assembly; the structure of the lifting drive assembly is a gear rack structure driven by a motor; when the top lifting door (210) and the bottom lifting door (220) are away from each other, the furnace door is opened, and when the two are in contact, the furnace door is closed.

3. The heat treatment furnace and the heat preservation furnace door system thereof according to claim 1, characterized in that: The load-bearing trolley comprises a trolley body (410), a side wheel group (420) and a bottom wheel group (430); the trolley body (410) is a horizontally arranged hard plate body, which plays a load-bearing role; the side wheel group (420) comprises more than 4 side wheels; the side wheels are a combination of longitudinally arranged hard cylindrical wheels, which are located on both sides of the trolley body (410) and rotate around their own axes to reduce the collision impact between the load-bearing trolley and the horizontal furnace body (100) and the load-bearing lifting platform, thereby improving the stability of the movement of the load-bearing trolley; the bottom wheel group (430) comprises a plurality of bottom wheels; the bottom wheels are transversely arranged hard cylindrical wheels, which are positioned at the bottom of the trolley body (410) close to both sides; when moving in the horizontal furnace body (100), they roll over the guide rails (110) in the furnace.

4. The heat treatment furnace and the heat insulation furnace door system thereof according to claim 1, characterized in that: It also includes a driving trolley, wherein the top of the trolley is provided with a plurality of lifting holes, lifting ears or iron blocks for the electromagnetic crane to adsorb; The driving trolley is generally plate-shaped, arranged horizontally, and is provided with wheels at the bottom and sides. It travels driven by a motor and is provided with an electric clamp at one end. It is normally located at the top of the load-bearing lifting platform. When the load-bearing trolley needs to be placed in or taken out, it is controlled to clamp the load-bearing trolley and transfer the load-bearing trolley to the target position; after the load-bearing trolley is dragged to the load-bearing lifting platform, the load-bearing trolley is lifted and transferred using lifting equipment.

5. The heat treatment furnace and the heat preservation furnace door system thereof according to claim 4, characterized in that: The driving vehicle comprises a base vehicle (510), a side load block (520), a combination rod (530), a limit compression spring (540), an end clamp (550), a load block displacement assembly and a side wheel driving assembly (570); The basic vehicle (510) is a horizontally arranged rectangular hard plate; Both sides of the base vehicle (510) are provided with a plurality of insertion holes for the combination rod (530) to pass through; the combination rod (530) passes through the insertion holes and is slidably positioned on the insertion holes; The side load block (520) is a hard rectangular plate, arranged horizontally, with the length direction perpendicular to the axial direction of the penetration hole, and there are two of them, which are symmetrically arranged and located on both sides of the base vehicle (510); a bottom wheel group (430) is provided at the bottom of the side load block (520), and a side wheel group (420) is provided on the side wall away from the base vehicle (510); The combination rods (530) are arranged transversely, the number of which is 4 or more, corresponding one to one with the penetration holes, and one end of which is fixed on the side wall of the side load block (520) close to the base vehicle (510); The limit compression spring (540) corresponds to the combination rod (530) one by one, is sleeved on the combination rod (530), and has two ends respectively abutting against the side load block (520) and the base carrier (510); The end clamp (550) is an electric clamp fixed on a side of the base vehicle (510) close to the furnace door of the horizontal furnace body (100); The load block displacement assembly is a winch structure, which is used to control the distance between the side load block (520) and the base vehicle (510) and thus control the overall size of the driving vehicle; The side wheel drive assembly (570) is positioned on the top of the base vehicle (510) and is a combination of a motor and a chain drive structure, and is used to drive the rotation of the side wheel assembly (420) on the side load block (520).

6. The heat treatment furnace and the heat preservation furnace door system thereof according to claim 5, characterized in that: The diameter of the penetration hole is greater than the diameter of the combination rod (530) by more than 0.8 cm; the number of the combination rods (530) is 4, two of which are arranged near the front end of the driving vehicle, and the other two are arranged near the rear end of the driving vehicle; the front end and the rear end of the driving vehicle are both provided with side wheel groups (420); the number of the carrier block shifting assemblies is two, which are respectively arranged near the front section and the rear end of the driving vehicle; the side wheel groups (420) on the driving vehicle are all driven by the side wheel driving assembly (570) to rotate; when the driving vehicle is transferred from the load-bearing lifting platform to the horizontal furnace body (100), the two load-bearing block shifting assemblies can be controlled to run successively to cause the driving vehicle to deform, thereby assisting the driving vehicle to smoothly and conveniently cross the gap between the load-bearing lifting platform and the guide rail (110) in the furnace.

7. The heat treatment furnace and the heat insulation furnace door system thereof according to claim 5 or 6, characterized in that: The driving vehicle is provided with a water cooling system; The water cooling system on the driving vehicle comprises a detachable water tank (581); the detachable water tank (581) is detachable, and each time the driving vehicle enters the horizontal furnace body (100), the detachable water tank (581) or the cooling liquid therein is replaced as a whole.

8. The heat treatment furnace and the heat insulation furnace door system thereof according to claim 5 or 6, characterized in that: A winch assembly (900) and a connection block (800) are also positioned on the driving vehicle; The hoisting assembly (900) is a combination of a rope reel and a steel wire rope. The rope reel is positioned on the top of the cart body (410) and rotates under the drive of the motor. One end of the steel wire rope is wound around the rope reel and positioned, and the other end passes through the connecting block (800) and is fixed to the end of the end clamp (550) close to the cart body (410). The connecting block (800) is a hard block, located at the top of the cart body (410) and arranged close to the front end of the cart body (410); the end clamp (550) is not fixed on the cart body (410); under normal conditions, the end clamp (550) is pulled by the winch assembly (900) to contact the connecting block (800); When the carrying trolley needs to be towed out, the carrying trolley is controlled to be driven to quickly approach the carrying trolley, and then the end clamp (550) is controlled to be fixed on the carrying trolley to be towed out; thereafter, the carrying trolley is controlled to be driven to quickly leave the furnace, and at the same time, the winch assembly (900) is controlled to operate to release the wire rope; After the trolley is driven to the outside of the furnace, the hoisting assembly (900) is controlled to operate the winding wire rope to stably pull the trolley out.

9. The heat treatment furnace and the heat insulation furnace door system thereof according to claim 5 or 6, characterized in that: The driving vehicle uses the expansion rod (551) to drag multiple carrying carts out at one time to a position near the furnace door in the furnace; The end fixing ring (440) is a long strip-shaped ring body; The expansion rod (551) is a hard long rod, which is clamped and fixed on the end clamp (550); The end clamp (550) is rotatably connected to the front end of the cart body (410), and is rotated by the motor, with the axial direction of the rotating shaft being parallel to the ground; When multiple load-bearing carts located in the same row need to be dragged out at one time, the expansion rod (551) is first fixedly clamped on the end clamp (550); then the load-bearing cart is controlled to be driven along the guide rail (110) in the furnace and enter the horizontal furnace body (100); when approaching the load-bearing cart to be dragged out, the end clamp (550) is controlled to rotate to drive the expansion rod (551) to rotate so that it is inserted into the end fixing ring (440); then the load-bearing cart is controlled to be driven to drag the corresponding load-bearing cart to a position close to the furnace mouth, so as to continue to drag out the horizontal furnace body (100) later.

10. A thermal insulation furnace door system, characterized in that: It comprises a top lift door (210), a door lifting assembly, a bottom lift door (220) and a lift driving assembly; The top lifting door (210) is a hard plate-shaped door panel arranged longitudinally, slidably positioned on the furnace mouth and lifted and lowered under the drive of the door lifting assembly; the door lifting assembly is fixed on the horizontal furnace body (100) and is a winch structure, which lifts the top lifting door (210) by pulling; The bottom lifting door (220) is located directly below the top lifting door (210) and is a hard plate-shaped door panel arranged longitudinally, slidably positioned on the furnace mouth and lifted and lowered under the drive of the lifting drive assembly; the structure of the lifting drive assembly is a gear rack structure driven by a motor; when the top lifting door (210) and the bottom lifting door (220) are away from each other, the furnace door is opened, and when the two are in contact, the furnace door is closed.

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