An air-cooled quenching heat treatment industrial furnace and its air quenching system

Abstract

The present application discloses an air-cooled quenching heat treatment industrial furnace and an air-quenching system thereof, which relate to the field of heat treatment technology. The present application optimizes and improves the structure of an air-cooled quenching heat treatment furnace in the prior art, in which gas nozzles are provided on both the inner top and the side walls; a hollow rectangular plate-shaped carrying trolley is used as a carrier for workpieces; a plurality of horizontally arranged hard bars are added to the furnace wall of the heat treatment furnace to be used as movable guide rails for the carrying trolley; a gas inlet connected to the internal space of the carrying trolley is provided on one side of the carrying trolley, and air holes are densely distributed on the bottom. The gas output by the gas nozzle on the furnace wall is sprayed into the internal space of the carrying trolley and is sprayed out from the air holes at the bottom thereof to participate in the cooling of the workpiece; the technical effects of the air-cooled quenching heat treatment industrial furnace being able to carry a large number of workpieces at a time, high utilization rate of the space in the furnace, and good cooling speed and uniformity of the workpieces heat treated in the furnace are achieved.

Description

Technical Field

[0001] The present invention relates to the field of heat treatment technology, in particular to an air-cooled quenching heat treatment industrial furnace and an air quenching system thereof. Background Art

[0002] Air-cooled quenching heat treatment industrial furnace is a heat treatment equipment that uses forced airflow as the cooling medium. It is mainly used for heating, heat preservation and rapid cooling (quenching) of metal workpieces. Its core feature is the controllable cooling achieved by high-speed airflow, replacing traditional water quenching, oil quenching or salt bath quenching. It is suitable for processing materials that are sensitive to deformation or have high environmental requirements.

[0003] Air-cooled quenching heat treatment industrial furnace adds an air-cooled quenching system to the heat treatment furnace, and uses a high-pressure fan and a multi-directional nozzle to complete the quenching operation of the workpiece in the furnace.

[0004] In the existing technology, due to the limitations of the structure of the air-cooled quenching heat treatment industrial furnace itself, the gas nozzles are mostly set on the furnace wall, furnace top and / or furnace bottom. During quenching cooling, due to the obstruction of the furnace components, the heat treatment workpiece carrier and the heat treatment workpiece itself, part of the workpiece position is difficult to take care of during the air jet process, resulting in uneven cooling of the workpiece, affecting the cooling speed and thus affecting the quality of the workpiece product.

[0005] In the prior art, in order to accommodate workpieces of different sizes, the box size of the heat treatment furnace is usually designed to be larger, but its bearing capacity for the heat-treated workpieces is poor, the space utilization rate in the furnace is low, and the number of workpieces that can be processed at a time is small.

[0006] Therefore, there is a need for an air-cooled quenching heat treatment industrial furnace that can carry a large number of workpieces at a time, has high furnace space utilization, and has good cooling speed and uniformity for the workpieces heat-treated in the furnace. Summary of the Invention

[0007] The embodiment of the present application solves the technical problems in the prior art of air-cooled quenching heat treatment industrial furnaces, such as small workpiece carrying capacity, low furnace space utilization, and poor cooling rate and uniformity of the workpieces processed in the furnace, by providing an air-cooled quenching heat treatment industrial furnace. The embodiment of the present application achieves the technical effects that the air-cooled quenching heat treatment industrial furnace can carry a large number of workpieces at a time, has high furnace space utilization, and has good cooling rate and uniformity of the workpieces heat treated in the furnace.

[0008] The embodiment of the present application provides an air-cooled quenching heat treatment industrial furnace, comprising a furnace body having a furnace door at at least one end and a plurality of gas nozzles on the side walls and the inner top, and an air quenching system; and further comprising a carrying trolley;

[0009] A plurality of built-in guide rails are provided on both inner side walls of the furnace body; the built-in guide rails are horizontally arranged hard long strips fixed to the inner wall of the furnace body, with two of them at the same height, for supporting the carrying trolley and guiding the movement of the carrying trolley;

[0010] The load-bearing trolley is in the shape of a rectangular plate, including a vehicle body, bottom wheels and side wheels; the vehicle body is hollow inside and arranged horizontally; the bottom wheels are against the built-in guide rails when in use; and the side wheels are positioned on both sides of the vehicle body;

[0011] The side walls of the vehicle shell are fixed with side air guide blocks, and the bottom is densely covered with air outlet holes. The side air guide blocks are hard blocks, the interior of which is hollow and communicates with the interior space of the vehicle shell, and a through hole is provided on the surface away from the vehicle shell.

[0012] The gas from the gas nozzle on the side wall of the furnace body enters the interior of the car body through the through holes on the side air guide block and is ejected from the bottom air outlet to the workpiece located at the bottom of the car body.

[0013] Furthermore, both ends of the vehicle body are provided with long strip-shaped air guide blocks, which are arranged horizontally and are hollow inside, with the length direction being perpendicular to the length direction of the furnace body; the internal space of the air guide blocks is an additional warehouse;

[0014] The interior space of the vehicle shell is the inner warehouse; the inner warehouse and the additional warehouse are connected; a plurality of air outlet holes are provided at the bottom of the air guide block, and bottom air guide ducts are provided on these air outlet holes; the bottom air guide duct at the bottom of the air guide block is tilted to spray air toward the bottom of the carrying vehicle.

[0015] Furthermore, the gas nozzle includes a blowing nozzle and a matching nozzle;

[0016] Each additional compartment is provided with at least one side air guide block;

[0017] Both ends of the vehicle body are provided with long strip-shaped air guide blocks, which are arranged horizontally and hollow inside, with their length direction perpendicular to the length direction of the furnace body; the interior space of the air guide blocks is an additional bin; the interior space of the vehicle body is an inner bin; the inner bin and the additional bin are connected; a plurality of air outlet holes are provided at the bottom of the air guide blocks, and bottom air guide ducts are provided on these air outlet holes; the bottom air guide ducts at the bottom of the air guide blocks are arranged obliquely to spray air toward the bottom of the vehicle body;

[0018] The bottom air guide ducts on the two air guide blocks are symmetrically arranged; there is no side air guide block on the vehicle body;

[0019] When the carrying trolley reaches the target position in the furnace, the side air guide blocks on it are matched with a matching air nozzle;

[0020] During air blowing cooling, the wind direction at the bottom of the entire load-bearing trolley is changed by adjusting the difference in air intake volume between the two additional compartments on the trolley shell.

[0021] Preferably, the gas nozzle includes a blowing nozzle and a matching nozzle; the matching nozzle is positioned on the side wall of the furnace body and is arranged in multiple rows, and each row of matching nozzles corresponds to a built-in guide rail; most of the gas ejected from the matching nozzle will enter the side air guide block; at least one of the matching nozzle and the side air guide block is floating, and the two are tightly attached to each other when they are close to each other.

[0022] Preferably, a bottom opening is provided at the center of the bottom of the vehicle shell;

[0023] The bottom opening is a rectangular through slot;

[0024] A guide tube is positioned on the bottom opening;

[0025] A carrier shaft is positioned on the guide tube, and a rotating plate is fixed on the carrier shaft;

[0026] The guide tube is a hard tube body, arranged longitudinally, with the outer wall fixed on the bottom opening, and is used to carry and accommodate the rotating plate;

[0027] The cross section of the guide tube is rectangular, and the longitudinal section is in the shape of "()";

[0028] The carrier shaft is a horizontally arranged hard shaft body, both ends of which are fixed on the guide tube, and the length direction is the same as the width direction of the vehicle body;

[0029] The rotating plate is a hard rectangular plate that is horizontal in a normal state and is connected to the carrier shaft by rotating around the axis of the carrier shaft. The edge of the rotating plate is always in close contact with the inner wall of the guide tube. The rotating plate is densely covered with through holes, which are used to inject airflow.

[0030] A side air guide block is provided near each of the four corners of the vehicle body;

[0031] During air blowing cooling, the control unit controls the air intake of the side air guide blocks to have different air pressures at different positions in the inner chamber, thereby changing the direction of the air flow injection.

[0032] Preferably, a bottom opening is provided at the center of the bottom of the vehicle body; the bottom opening is a circular through groove;

[0033] A guide tube is positioned on the bottom opening;

[0034] A carrying rod is fixed on the inner top of the vehicle shell; a rotating plate is positioned at the bottom of the carrying rod;

[0035] The guide tube is a hard tube body, arranged longitudinally, with the outer side wall fixed on the bottom opening;

[0036] The cross section of the guide tube is circular, and the longitudinal section is in the shape of "()";

[0037] The carrying rod is a longitudinally arranged hard rod body, the top of which is fixed on the inner top of the vehicle shell;

[0038] The rotating plate is a hard circular plate, the center of which is spherically connected to the bottom of the carrier rod and is in a horizontal state under normal conditions;

[0039] The edge of the rotating plate is always in close contact with the inner wall of the guide tube; the rotating plate is densely covered with through holes;

[0040] A side air guide block is provided near each of the four corners of the vehicle body;

[0041] After the carrying trolley reaches the target position, each side air guide block on it is connected to a matching air nozzle; during air blowing cooling, the control unit controls the air intake volume of the side air guide blocks to control the air pressure at different positions in the inner warehouse, thereby changing the direction of the bottom airflow injection.

[0042] Preferably, the top surface of the vehicle shell is also densely covered with small holes communicating with its internal space.

[0043] Preferably, the built-in guide rail is slidably positioned on the inner wall of the furnace body along its own length direction;

[0044] The furnace body is provided with a guide rail drive assembly for driving the lateral movement of the built-in guide rail;

[0045] The surface of the built-in guide rail that contacts the trolley is densely covered with small grooves or protrusions to ensure that the trolley does not slide relative to the built-in guide rail due to the lateral movement of the built-in guide rail;

[0046] The length of the built-in guide rail is less than 10 cm of the internal length of the furnace body;

[0047] During the air blowing cooling process, the built-in guide rail is controlled to move laterally to change the air blowing direction.

[0048] Preferably, the surface of the matching air nozzle away from the side wall of the furnace body is a plane, and the surface of the side air guide block close to the side wall of the furnace body is a plane; after the side air guide block corresponds to the matching air nozzle, the distance between the surface of the matching air nozzle away from the side wall of the furnace body and the surface of the matching air nozzle close to the side wall of the furnace body is less than 3 mm.

[0049] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0050] The invention optimizes and improves the structure of an air-cooled quenching heat treatment furnace in the prior art, in which gas nozzles are provided on both the inner top and the side walls; a hollow rectangular plate-shaped carrying trolley is used as a carrier for workpieces; a plurality of horizontally arranged hard bars are added to the furnace wall of the heat treatment furnace to serve as movable guide rails for the carrying trolley; when the 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 it carries, thereby increasing the load capacity of the heat treatment furnace and fully utilizing the heat energy in the furnace; a gas inlet connected to the internal space of the carrying trolley is provided on one side of the carrying trolley, and air holes are densely distributed on the bottom. Gas output by the gas nozzles on the furnace wall is sprayed into the internal space of the carrying trolley and ejected from the air holes at the bottom thereof to participate in cooling the workpiece; the invention effectively solves the technical problems of the prior art air-cooled quenching heat treatment industrial furnace, such as small workpiece load capacity, low furnace space utilization, and poor cooling speed and uniformity of the workpieces processed in the furnace, thereby achieving the technical effect that the air-cooled quenching heat treatment industrial furnace can carry a large number of workpieces at a time, high furnace space utilization, and good cooling speed and uniformity of the workpieces heat treated in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a schematic diagram of the appearance and structure of the air-cooled quenching heat treatment industrial furnace of this application;

[0052] Figure 2 This is a schematic diagram of the internal structure of the air-cooled quenching heat treatment industrial furnace of this application;

[0053] Figure 3 This is a schematic diagram of the appearance structure of the load-bearing trolley;

[0054] Figure 4 This is a simplified structural diagram of the load-bearing trolley;

[0055] Figure 5 Schematic diagram of the layout of the air inlet;

[0056] Figure 6 Schematic diagram of the positional relationship between the inner bin and the additional bin;

[0057] Figure 7 Schematic diagram of the connection between the inner warehouse and the additional warehouse;

[0058] Figure 8 This is a simplified structural diagram of the air quenching system for this application;

[0059] Figure 9 A schematic diagram showing the positional relationship between the matching air nozzle and the side air guide block;

[0060] Figure 10 To match the internal structure diagram of the tuyere;

[0061] Figure 11 Schematic diagram of the positional relationship between the side air guide block with floating blocks and the matching air nozzle;

[0062] Figure 12 Schematic diagram of the internal structure of the side air guide block with floating blocks;

[0063] Figure 13 This is a schematic diagram of the internal structure of the load-bearing trolley;

[0064] Figure 14 Schematic diagram of the positional relationship between the rotating plate and the vehicle shell;

[0065] Figure 15 A schematic diagram of the positional relationship between the circular rotating plate and the vehicle shell;

[0066] Figure 16 Schematic diagram of the positional relationship between the circular rotating plate, the carrier rod and the guide plate.

[0067] In the picture:

[0068] Circulating fan 001, matching air nozzle 002, basic pipe 021, floating block 022, through hole 023, built-in compression spring 024, carrier plate 025, air outlet 003, air inlet 004, air cooling assembly 005, air control valve 006, furnace body 100, furnace door 110, built-in guide rail 120, carrying trolley 200, car body 210, bottom wheel 211, side wheel 212, bottom opening 213, guide pipe 214, rotating plate 215, carrying shaft 216, carrying rod 217, bottom pipe 218, side air guide block 220, end clamping body 230, bottom air guide duct 240, inner warehouse 250, additional warehouse 260, basic carrier 310, longitudinal guide rail 320, sliding clip 330. DETAILED DESCRIPTION

[0069] To facilitate understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0070] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0072] Example 1

[0073] As Figures 1 to 5 shown, the air-cooled quenching heat treatment industrial furnace of the present application includes a furnace body 100, a loading trolley 200, a trolley displacement component, an air quenching system, a power component, and a control unit.

[0074] The furnace body 100 is of a box structure, horizontally arranged, with a furnace door 110 provided at at least one end, and a plurality of gas nozzles are provided on both the side walls and the inner top; a plurality of built-in guide rails 120 are provided on both side walls of the furnace body 100; the built-in guide rails 120 are horizontally arranged hard long strips, fixed on the inner wall of the furnace body 100, and are pairwise at the same height, used to support the loading trolley 200 and guide the movement of the loading trolley; the longitudinal section of the built-in guide rail 120 is in the shape of a straight line, a square, an I-shape, an L-shape or a C-shape; during use, the built-in guide rail 120 contacts the bottom wheels 211 of the loading trolley.

[0075] The loading trolley 200 is a rectangular plate as a whole, which plays a loading role, and includes a trolley housing 210, bottom wheels 211 and side wheels 212; for the convenience of description, the surface of the loading trolley 200 close to the furnace wall is defined as the side surface, and the surface in the length direction of the furnace body 100 is defined as the end surface; the trolley housing 210 is a hollow hard plate body, horizontally arranged, the top surface is used to carry the workpieces to be heat-treated, the number of bottom wheels 211 is multiple, and they are horizontally arranged cylindrical wheel bodies, positioned at the positions close to both sides at the bottom of the trolley housing 210; during use, the bottom wheels 抵触着内置导轨120 is translated as contact the built-in guide rails 120; the number of side wheels 212 is multiple, and they are longitudinally arranged cylindrical wheel bodies, rotatably connected to the side walls of the trolley housing 210, and after the loading trolley 200 enters the furnace, the side wheels 212 contact the inner side wall of the furnace body 100 or the side wall of the built-in guide rail 120;

[0076] A side air guide block 220 is fixed at a position close to the top of the side wall of the trolley housing 210, and air outlet holes are densely arranged at the bottom; the side air guide block 220 is a hard block body, the inside is hollow and communicated with the internal space of the trolley housing 210, and through holes are provided on the surface of the side air guide block 220 away from the trolley housing 210; the gas from the gas nozzles on the side wall of the furnace body 100 enters the inside of the trolley housing 210 through the through holes on the side air guide block 220 and is sprayed out from the bottom air outlet holes and sprayed onto the workpieces located at the bottom of the trolley housing 210.

[0077] Further, end clamping bodies 230 for facilitating the clamping and positioning of the trolley displacement component are provided at both ends of the trolley housing 210; the end clamping bodies 230 are horizontally arranged plates or blocks.

[0078] Preferably, in order to guide the direction of the output airflow, the injection distance of the airflow ejected from the bottom of the vehicle body 210 is extended; a plurality of bottom air ducts 240 are also fixed to the bottom of the vehicle body 210; the bottom air ducts 240 are longitudinally arranged hard tubes, corresponding one to one with the air outlet holes.

[0079] The vehicle shifting assembly is a mobile trolley, which is provided with a fixing component for fixing the load-bearing trolley 200; the moving assembly of the mobile trolley is a crawler structure or a wheel structure, which is used to timely position the load-bearing trolley 200 and drive the load-bearing trolley 200 to slide on the built-in guide rail 120.

[0080] Furthermore, the main structure of the vehicle shifting assembly is a mobile trolley provided with a mechanical arm with a clamping and fixing function at the end, which is used to clamp and fix the carrying trolley 200 in time and drive the carrying trolley 200 to slide on the built-in guide rail 120.

[0081] Furthermore, the vehicle shifting assembly includes a basic carrier 310, a longitudinal guide rail 320 and a sliding clamp 330; the basic carrier 310 is a wheeled or tracked trolley, which operates under remote control; the longitudinal guide rail 320 is a longitudinally arranged hard straight guide rail, the bottom of which is fixed to the top of the basic carrier 310, and is used to guide the movement of the sliding clamp 330; the sliding clamp 330 is an electric clamp, which is arranged horizontally and moves up and down under the control of the control unit to perform clamping and fixing operations.

[0082] The air quenching system is positioned on the furnace body 100 and is used to blow air to the workpiece in the furnace to assist in cooling it. It includes multiple gas nozzles positioned on the furnace wall; the gas ejected from some of the gas nozzles will be blown into the side air guide blocks 220.

[0083] Further, such as Figure 8As shown, the air quenching system includes a circulating fan 001, a gas nozzle, an air inlet 004, an air cooling component 005 and an air control valve 006; the circulating fan 001 is positioned at the top or one side of the furnace body 100; the gas nozzle includes a blowing nozzle and a matching nozzle 002; the blowing nozzle and the matching nozzle 002 are both multiple in number, both of which are provided with an air outlet 003, and are connected to the circulating fan 001; the blowing nozzle is positioned on the top of the furnace body 100 and on the side wall of the furnace body, for ejecting air flow toward the workpiece; the matching nozzle 002 is positioned on the side wall of the furnace body 100, and is arranged in multiple rows, and each row of matching nozzles 002 corresponds to a built-in guide rail 120; the air outlet 003 on the matching nozzle 002 corresponding to the built-in guide rail 120 is connected to the side air guide block 2 of the carrying trolley 200 on the built-in guide rail 120 20 through holes are at the same height; most of the gas ejected from the matching air nozzle 002 will enter the side air guide block 220; the air inlet 004 is positioned at the top and / or bottom of the furnace body 100, and is connected to the air cooling component 005; the air cooling component 005 is connected to the circulating fan 001, for cooling the gas flowing through; the air cooling component 005 includes a heat exchanger; the air control valve 006 is positioned on the air duct where the blowing air nozzle and the circulating fan 001 are connected, and is also positioned on the air duct where the matching air nozzle 002 and the circulating fan 001 are connected, for being controlled by the control unit to control the on and off of the air duct and the size of the air flow rate; during operation, the gas (protective gas) in the furnace enters the air cooling component 005 through the air inlet 004 and is then transported to the circulating fan 001, and thereafter is output from the blowing air nozzle and the matching air nozzle 002 through the air control valve 006.

[0084] Furthermore, the surface of the matching air nozzle 002 away from the side wall of the furnace body 100 is a plane, and the surface of the side air guide block 220 close to the side wall of the furnace body 100 is a plane; after the side air guide block 220 corresponds to the matching air nozzle 002 (that is, after the carrying trolley 200 moves to the target position, the side air guide block 220 is close to the matching air nozzle 002 and the gas channels on the two correspond), the distance between the surface of the matching air nozzle 002 away from the side wall of the furnace body 100 and the surface of the matching air nozzle 002 close to the side wall of the furnace body 100 is less than 3 mm.

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

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

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

[0088] First, the workpieces to be heat treated are placed on multiple carriages 200. Then, the layout of the multiple carriages 200 within the furnace body 100 is planned and determined based on the total height of the carriages and the workpieces on them, thereby fully utilizing the space within the furnace.

[0089] The furnace door 110 is controlled to open, and then the trolley to be loaded into the furnace body 100 is lifted by a forklift and loaded into the furnace body 100; thereafter, the trolley shifting assembly is controlled to move the trolley 200 to the target position (the target placement position of the trolley 200) and make the side air guide block 220 match the matching air nozzle 002;

[0090] After that, the other carrying carriages 200 are moved in sequence, and then the furnace door 110 is closed to start heat treatment of the workpiece in the furnace;

[0091] During the heat treatment process, the cooling gas enters the interior of the carrier 200 through the matching air nozzle 002 and the side air guide block 220 and is ejected from the bottom thereof to participate in the cooling of the workpiece;

[0092] After the heat treatment is completed, the furnace door 110 is opened and the carrying carts 200 are transferred out one by one.

[0093] Preferably, the vehicle shifting assembly is a forklift with a remote control function; the vehicle shifting assembly can not only be used to drive the carrying trolley 200 to move on the built-in guide rail 120, but also assist the carrying trolley 200 in and out of the furnace body 100.

[0094] Furthermore, in order to further promote gas flow and thus accelerate cooling, a mesh plate (a hard plate densely covered with holes or a plate-like mesh woven with metal wire) is set on the top of the carrying trolley 200; the mesh plate is arranged horizontally and fixed to the top of the carrying trolley 200 by a bracket, with the bottom being more than 3 cm away from the top surface of the carrying trolley 200, and the top being used to support the workpiece.

[0095] Preferably, the bottom air duct 240 at the bottom of the vehicle body 210 is tilted so that air is blown diagonally downward; when the carrying trolley 200 is loaded into the furnace body 100, the air jet direction of the carrying trolley 200 can be selected as needed (i.e., the head or tail of the carrying trolley 200 can be inserted into the furnace first as needed).

[0096] Preferably, after the carrying trolley 200 loaded with the workpiece is loaded into the furnace, an empty carrying trolley 200 may be loaded above the trolley for jet cooling.

[0097] Furthermore, the height between the carrying trolley 200 on the top of the workpiece (heat-treated workpiece) and the workpiece can be selected as needed.

[0098] Preferably, the top surface of the vehicle body 210 is also densely covered with small holes communicating with its internal space.

[0099] Preferably, Figure 6 and Figure 7 As shown, both ends of the vehicle body 210 are provided with long air guide blocks, which are arranged horizontally and are hollow inside, and the length direction is perpendicular to the length direction of the furnace body 100; the internal space of the air guide block is the additional warehouse 260; the internal space of the vehicle body 210 is the inner warehouse 250; the inner warehouse 250 and the additional warehouse 260 are connected; a plurality of air outlet holes are provided at the bottom of the air guide block, and bottom air ducts 240 are provided on these air outlet holes; the bottom air duct 240 at the bottom of the air guide block is arranged obliquely to spray air toward the bottom of the carrying trolley 200.

[0100] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0101] The invention solves the technical problems in the prior art of the air-cooled quenching heat treatment industrial furnace, such as the small workpiece-carrying capacity, low furnace space utilization, and poor cooling speed and uniformity of the workpieces processed in the furnace. The invention achieves the technical effect that the air-cooled quenching heat treatment industrial furnace can carry a large number of workpieces at a time, has a high furnace space utilization, and has good cooling speed and uniformity of the workpieces heat treated in the furnace.

[0102] Example 2

[0103] In order to further improve the practicality of the present application, increase the cooling efficiency, and accelerate the cooling of the workpiece, the present embodiment optimizes and improves the structure of the additional bin 260 on the carrier trolley 200 on the basis of the above embodiment, so that the direction of the wind blowing toward the workpiece can be adjusted as needed, specifically:

[0104] like Figure 6 and Figure 7 As shown, each additional compartment 260 is provided with at least one side air guide block 220;

[0105] Both ends of the car body 210 are provided with long strip-shaped air guide blocks. The air guide blocks are arranged horizontally and are hollow inside, with their length direction perpendicular to the length direction of the furnace body 100. The interior space of the air guide blocks is the additional compartment 260; the interior space of the car body 210 is the inner compartment 250; the inner compartment 250 and the additional compartment 260 are connected. The bottom of the air guide blocks is provided with multiple air outlets, and these air outlets are each provided with a bottom air guide duct 240. The bottom air guide duct 240 at the bottom of the air guide blocks is arranged at an angle to spray air toward the bottom of the car body 210.

[0106] The bottom air guide ducts 240 on the two air guide blocks are symmetrically arranged;

[0107] The vehicle body 210 is not provided with a side air guide block 220;

[0108] When the carrying trolley 200 reaches the target position in the furnace, the side air guide blocks 220 on it are matched with a matching air nozzle 002;

[0109] During air blowing cooling, the wind direction at the bottom of the entire carrying trolley 200 can be changed by adjusting the difference in air intake of the two additional chambers 260 on the vehicle shell 210 .

[0110] Example 3

[0111] In order to increase the air flow velocity ejected from the bottom of the carrier trolley 200 and reduce gas loss, the embodiment of the present application optimizes and improves the structure of the matching air nozzle 002 and the side air guide block 220 based on the above embodiment, specifically:

[0112] Both ends of the furnace body 100 are provided with an inlet and an outlet, and both the inlet and outlet are provided with a furnace door 110;

[0113] like Figure 9 and Figure 10 As shown, the matching nozzle 002 includes a carrier plate 025, a base tube 021, a floating block 022 and a built-in compression spring 024;

[0114] The carrier plate 025 is a longitudinally arranged hard plate fixed to the side wall of the furnace body 100 to play a bearing and supporting role;

[0115] The base pipe 021 is a horizontally arranged hard pipe body, one end of which is fixed on the carrier plate 025;

[0116] The floating block 022 is a hard block, which is sheathed by the base tube 021, slidably positioned on the base tube 021 and slides along the length of the base tube 021; the outer contour of the floating block 022 matches the inner contour of the base tube 021;

[0117] The floating block 022, the base tube 021 and the carrier plate 025 together form a columnar space, which is connected to the circulating fan 001; the gap between the edge of the floating block 022 and the inner wall of the base tube 021 is less than 1 mm;

[0118] The built-in compression spring 024 is a metal compression spring, with its two ends fixed on the carrier plate 025 and the floating block 022 respectively;

[0119] The surface of the floating block 022 away from the carrier plate 025 is an inclined surface, which is provided with a through hole 023 (the through hole 023 here is the air outlet 003 in the first embodiment) that communicates with the space enclosed by the floating block 022, the base tube 021 and the carrier plate 025. The cross section of the floating block 022 is a right-angled trapezoid.

[0120] The side air guide block 220 is a hard block, and its surface close to the inner wall of the furnace body 100 is an inclined surface and is adapted to the inclined surface of the floating block 022;

[0121] When the carrying trolley 200 slides in the furnace body 100, the floating block 022 will contact the side air guide block 220 and slide due to the force; when the carrying trolley 200 reaches the target position, the inclined surface of the floating block 022 will be close to the side air guide block 220; the carrying trolley 200 moves unidirectionally in the furnace body 100 (entering from one furnace port and exiting from the other furnace port).

[0122] Example 4

[0123] In order to increase the air flow velocity ejected from the bottom of the carrier trolley 200 and reduce gas loss, the embodiment of the present application optimizes and improves the structure of the matching air nozzle 002 and the side air guide block 220 based on the above embodiment, specifically:

[0124] Both ends of the furnace body 100 are provided with an inlet and an outlet, and both the inlet and outlet are provided with a furnace door 110;

[0125] like Figure 11 and Figure 12 As shown, the side air guide block 220 includes a carrier plate 025, a base tube 021, a floating block 022 and a built-in compression spring 024;

[0126] The carrier plate 025 is a longitudinally arranged hard plate fixed on the carrying trolley 200, and plays the role of bearing support;

[0127] The base pipe 021 is a horizontally arranged hard pipe body, one end of which is fixed on the carrier plate 025;

[0128] The floating block 022 is a hard block, which is sheathed by the base tube 021, slidably positioned on the base tube 021 and slides along the length of the base tube 021; the outer contour of the floating block 022 matches the inner contour of the base tube 021;

[0129] The floating block 022, the base tube 021 and the carrier plate 025 together form a cylindrical space, which is connected to the inner chamber 250 or the additional chamber 260. The gap between the edge of the floating block 022 and the base tube 021 is less than 1 mm.

[0130] The built-in compression spring 024 is a metal compression spring, with its two ends fixed on the carrier plate 025 and the floating block 022 respectively;

[0131] The surface of the floating block 022 away from the carrier plate 025 is an inclined surface, which is provided with a through hole 023 that communicates with the space enclosed by the floating block 022, the base tube 021 and the carrier plate 025. The cross section of the floating block 022 is a right-angled trapezoid.

[0132] The matching air nozzle 002 is connected to the circulating fan 001 and fixed on the side wall of the furnace body 100. It is a hard hollow block. Its surface away from the inner wall of the furnace body 100 is an inclined surface and matches the inclined surface of the floating block 022.

[0133] When the carrying trolley 200 slides in the furnace body 100, the floating block 022 will contact the matching nozzle 002 and slide due to the force; when the carrying trolley 200 reaches the target position, the inclined surface of the floating block 022 will be close to the matching nozzle 002; the carrying trolley 200 moves unidirectionally in the furnace body 100 (entering from one furnace port and exiting from the other furnace port).

[0134] Example 5

[0135] In order to further improve the practicality of the present application, increase cooling efficiency, accelerate workpiece cooling, and improve workpiece cooling uniformity, the present embodiment optimizes and improves the structure of the vehicle shell 210 on the supporting vehicle 200 based on the above embodiment, so that the direction of the wind blowing toward the workpiece can be adjusted as needed, specifically:

[0136] like Figure 13 and Figure 14 As shown, a bottom opening 213 is provided at the center of the bottom of the vehicle body 210; the bottom opening 213 is a rectangular through slot;

[0137] A guide tube 214 is positioned on the bottom opening 213;

[0138] A carrier shaft 216 is positioned on the guide tube 214 , and a rotating plate 215 is fixed on the carrier shaft 216 ;

[0139] The guide tube 214 is a hard tube body, arranged longitudinally, with its outer wall fixed on the bottom opening 213, and is used to carry and accommodate the rotating plate 215;

[0140] The cross section of the guide tube 214 is rectangular, and the longitudinal section is in the shape of "()";

[0141] The carrier shaft 216 is a horizontally arranged hard shaft, both ends of which are fixed to the guide tube 214, and the length direction is the same as the width direction of the vehicle body 210;

[0142] The rotating plate 215 is a rigid rectangular plate. Normally (in equilibrium), it is horizontal and rotatably connected to the carrier shaft 216 about its axis. The edge of the rotating plate 215 is always in close contact with the inner wall of the guide tube 214, with a spacing of less than 2 mm between the two. This spacing is adjusted as needed based on the materials of the rotating plate 215 and the guide tube 214 to ensure that the rotating plate 215 can still rotate after thermal expansion. The rotating plate 215 is densely covered with through holes, which are used to inject airflow.

[0143] A side air guide block 220 is provided near each of the four corners of the vehicle body 210;

[0144] After the carrying trolley 200 reaches the target position, each side air guide block 220 on it is connected to a matching air nozzle 002; during air blowing cooling, the control unit controls the air intake volume of the side air guide block 220 to control the air pressure at different positions in the inner warehouse 250, thereby causing the rotating plate 215 to rotate under the action of the air pressure and thus changing the direction of the air flow injection.

[0145] Preferably, a plurality of longitudinally arranged bottom tubes 218 are fixed to the bottom of the rotating plate 215 ; the bottom tubes 218 are hard metal tubes, the tops of which are fixed to the bottom of the rotating plate 215 and correspond one-to-one to the through holes on the rotating plate 215 .

[0146] Example 6

[0147] In order to further improve the practicality of the present application, increase cooling efficiency, accelerate workpiece cooling, and improve workpiece cooling uniformity, the present embodiment optimizes and improves the structure of the vehicle shell 210 on the supporting vehicle 200 based on the above embodiment, so that the direction of the wind blowing toward the workpiece can be adjusted as needed, specifically:

[0148] like Figure 15 and Figure 16 As shown, a bottom opening 213 is provided at the center of the bottom of the vehicle body 210; the bottom opening 213 is a circular through groove;

[0149] A guide tube 214 is positioned on the bottom opening 213;

[0150] A carrying rod 217 is fixed on the inner top of the vehicle body 210; a rotating plate 215 is positioned at the bottom of the carrying rod 217;

[0151] The guide tube 214 is a hard tube body, arranged longitudinally, with its outer wall fixed on the bottom opening 213, and is used to carry and accommodate the rotating plate 215;

[0152] The cross section of the guide tube 214 is circular, and the longitudinal section is in the shape of a "()";

[0153] The carrying rod 217 is a longitudinally arranged hard rod, the top of which is fixed on the inner top of the vehicle shell 210;

[0154] The rotating plate 215 is a hard circular plate, the center of which is spherically connected to the bottom of the carrier rod 217 and is in a horizontal state in normal state (balanced state);

[0155] The edge of the rotating plate 215 is always in close contact with the inner wall of the guide tube 214, with a spacing of less than 2 mm (this spacing is adjusted as needed based on the materials of the rotating plate 215 and the guide tube 214 to ensure that the rotating plate 215 can still rotate after thermal expansion). The rotating plate 215 is densely covered with through holes, which are used to inject airflow.

[0156] A side air guide block 220 is provided near each of the four corners of the vehicle body 210;

[0157] After the carrying trolley 200 reaches the target position, each side air guide block 220 on it is connected to a matching air nozzle 002; during air blowing cooling, the control unit controls the air intake volume of the side air guide block 220 to be different, thereby controlling the air pressure at different positions in the inner warehouse 250 to be different, thereby causing the rotating plate 215 to rotate under the action of the air pressure and changing the direction of the bottom airflow injection.

[0158] Preferably, a plurality of longitudinally arranged bottom tubes 218 are fixed to the bottom of the rotating plate 215 ; the bottom tubes 218 are hard metal tubes, the tops of which are fixed to the bottom of the rotating plate 215 and correspond one-to-one to the through holes on the rotating plate 215 .

[0159] Preferably, the bottom of the vehicle body 210 away from the rotating plate 215 is also densely covered with air holes, and the air holes are of different sizes.

[0160] Example 7

[0161] To further improve the speed and uniformity of jet cooling, the present embodiment optimizes and improves the structure of the built-in guide rail 120 based on the above embodiment, improves the roughness of the surface in contact with the bottom wheel 211, and enables the built-in guide rail 120 to move back and forth as a whole when cooling the workpiece; specifically:

[0162] The built-in guide rail 120 is slidably positioned on the inner wall of the furnace body 100 along its length direction;

[0163] The furnace body 100 is provided with a guide rail drive assembly for driving the lateral movement of the built-in guide rail 120;

[0164] The structure of the guide rail driving assembly is preferably a rack and pinion mechanism driven by a motor;

[0165] The surface of the built-in guide rail 120 that contacts the trolley 200 is densely covered with small grooves or protrusions to ensure that the trolley 200 does not slide relative to the built-in guide rail 120 due to the lateral movement of the built-in guide rail 120;

[0166] The length of the built-in guide rail 120 is less than the internal length of the furnace body 100 by more than 10 cm;

[0167] During the air blowing cooling process, the built-in guide rail 120 is controlled to move laterally to change the air blowing direction and thus improve the cooling uniformity.

[0168] Preferably, the built-in guide rails 120 at different heights move in different directions at the same time.

[0169] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air-cooled quenching heat treatment industrial furnace, comprising a furnace body (100) with a furnace door (110) at at least one end and a plurality of gas nozzles on the side walls and the inner top, and an air quenching system; characterized in that: Also included is a carrying trolley (200); A plurality of built-in guide rails (120) are provided on both inner side walls of the furnace body (100); the built-in guide rails (120) are horizontally arranged hard long strips, fixed on the inner wall of the furnace body (100), and are of equal height in pairs, and are used to support the carrying trolley (200) and guide the movement of the carrying trolley; The load-bearing trolley (200) is in the shape of a rectangular plate, and includes a vehicle body (210), bottom wheels (211), and side wheels (212); the vehicle body (210) is hollow inside and arranged transversely; the bottom wheels (211) abut against the built-in guide rails (120) when in use; and the side wheels (212) are positioned on both sides of the vehicle body (210); A side air guide block (220) is fixed on the side wall of the vehicle body (210), and the bottom is densely covered with air outlet holes; the side air guide block (220) is a hard block, the interior of which is hollow and communicates with the interior space of the vehicle body (210), and a through hole is provided on the surface away from the vehicle body (210); Gas from the gas nozzle on the side wall of the furnace body (100) enters the interior of the vehicle body (210) through the through hole on the side air guide block (220) and is ejected from the bottom air outlet toward the workpiece located at the bottom of the vehicle body (210); Both ends of the vehicle body (210) are provided with long strip-shaped air guide blocks, which are arranged horizontally and are hollow inside, with their length direction perpendicular to the length direction of the furnace body (100); the interior space of the air guide blocks is an additional chamber (260); The interior space of the vehicle shell (210) is an inner compartment (250); the inner compartment (250) and the additional compartment (260) are connected; a plurality of air outlet holes are provided at the bottom of the air guide block, and bottom air guide ducts (240) are provided on each of the air outlet holes; the bottom air guide duct (240) at the bottom of the air guide block is tilted and sprays air toward the bottom of the carrying vehicle (200).

2. The air-cooled quenching heat treatment industrial furnace according to claim 1, characterized in that: The gas nozzle comprises a blowing nozzle and a matching nozzle (002); Each additional compartment (260) is provided with at least one side air guide block (220); Both ends of the vehicle body (210) are provided with long strip-shaped air guide blocks, which are arranged horizontally and are hollow inside, with their length direction being perpendicular to the length direction of the furnace body (100); the interior space of the air guide block is an additional bin (260); the interior space of the vehicle body (210) is an inner bin (250); the inner bin (250) and the additional bin (260) are connected; a plurality of air outlet holes are provided at the bottom of the air guide block, and bottom air guide ducts (240) are provided on these air outlet holes; the bottom air guide ducts (240) at the bottom of the air guide block are arranged obliquely to spray air toward the bottom of the vehicle body (210); The bottom air guide ducts (240) on the two air guide blocks are symmetrically arranged; the vehicle body (210) is not provided with side air guide blocks (220); When the carrying trolley (200) reaches the target position in the furnace, the side air guide blocks (220) on it are matched with a matching air nozzle (002); During air blowing cooling, the wind direction at the bottom of the entire carrying trolley (200) is changed by adjusting the difference in the air intake volume of the two additional chambers (260) on the vehicle shell (210).

3. The air-cooled quenching heat treatment industrial furnace according to claim 1, characterized in that: The gas nozzle comprises an air blowing nozzle and a matching nozzle (002); the matching nozzle (002) is positioned on the side wall of the furnace body (100) and is arranged in multiple rows, with each row of matching nozzles (002) corresponding to a built-in guide rail (120); most of the gas ejected from the matching nozzle (002) enters the side air guide block (220); at least one of the matching nozzle (002) and the side air guide block (220) is floating, and the two are tightly attached to each other when they are close to each other.

4. The air-cooled quenching heat treatment industrial furnace according to claim 1, characterized in that: A bottom opening (213) is provided at the center of the bottom of the vehicle housing (210); The bottom opening (213) is a rectangular through slot; A guide tube (214) is positioned on the bottom opening (213); A carrier shaft (216) is positioned on the guide tube (214), and a rotating plate (215) is fixed on the carrier shaft (216); The guide tube (214) is a hard tube body as a whole, arranged longitudinally, with its outer side wall fixed on the bottom opening (213), and is used to carry and accommodate the rotating plate (215); The cross section of the guide tube (214) is rectangular, and the longitudinal section is in the shape of "()"; The carrier shaft (216) is a hard shaft body arranged transversely, both ends of which are fixed on the guide tube (214), and the length direction is the same as the width direction of the vehicle body (210); The rotating plate (215) is a hard rectangular plate, which is in a horizontal state under normal conditions and is connected to the carrier shaft (216) by rotating around the axis of the carrier shaft (216); the edge of the rotating plate (215) is always in close contact with the inner wall of the guide tube (214); the rotating plate (215) is densely covered with through holes, which are used to inject airflow; A side air guide block (220) is provided near each of the four corners of the vehicle housing (210); During air blowing cooling, the control unit controls the air intake of the side air guide block (220) to be different, thereby controlling the air pressure at different positions in the inner bin (250) to be different, thereby changing the air flow injection direction.

5. The air-cooled quenching heat treatment industrial furnace according to claim 1, characterized in that: A bottom opening (213) is provided at the center of the bottom of the vehicle body (210); the bottom opening (213) is a circular through groove; A guide tube (214) is positioned on the bottom opening (213); A carrying rod (217) is fixed on the inner top of the vehicle housing (210); a rotating plate (215) is positioned at the bottom of the carrying rod (217); The guide tube (214) is a hard tube body as a whole, arranged longitudinally, and its outer side wall is fixed on the bottom opening (213); The guide tube (214) has a circular cross section and a "()" shape in the longitudinal section; The carrying rod (217) is a longitudinally arranged hard rod, the top of which is fixed on the inner top of the vehicle shell (210); The rotating plate (215) is a hard circular plate, the center of which is spherically connected to the bottom of the carrier rod (217) and is in a horizontal state under normal conditions; The edge of the rotating plate (215) is always in close contact with the inner wall of the guide tube (214); the rotating plate (215) is densely covered with through holes; A side air guide block (220) is provided near each of the four corners of the vehicle housing (210); After the carrying trolley (200) reaches the target position, each side air guide block (220) thereon is connected to a matching air nozzle (002); during air blowing cooling, the control unit controls the air intake of the side air guide blocks (220) to have different air pressures at different positions in the inner bin (250), thereby changing the bottom airflow ejection direction.

6. The air-cooled quenching heat treatment industrial furnace according to claim 1, characterized in that: The top surface of the vehicle shell (210) is also densely covered with small holes communicating with its internal space.

7. The air-cooled quenching heat treatment industrial furnace according to any one of claims 1 to 6, characterized in that: The built-in guide rail (120) is slidably positioned on the inner wall of the furnace body (100) along its own length direction; A guide rail driving assembly is provided on the furnace body (100) for driving the lateral movement of the built-in guide rail (120); The surface of the built-in guide rail (120) in contact with the carrying trolley (200) is densely covered with small grooves or protrusions to ensure that the carrying trolley (200) will not slide relative to the built-in guide rail (120) due to the lateral movement of the built-in guide rail (120); The length of the built-in guide rail (120) is less than 10 centimeters of the inner length of the furnace body (100); During the air blowing cooling process, the built-in guide rail (120) is controlled to move laterally to change the air blowing direction.

8. The air-cooled quenching heat treatment industrial furnace according to any one of claims 2, 3 or 5, characterized in that: The surface of the matching air nozzle (002) away from the side wall of the furnace body (100) is a plane, and the surface of the side air guide block (220) close to the side wall of the furnace body (100) is a plane; after the side air guide block (220) corresponds to the matching air nozzle (002), the distance between the surface of the matching air nozzle (002) away from the side wall of the furnace body (100) and the surface of the matching air nozzle (002) close to the side wall of the furnace body (100) is less than 3 mm.

9. An air quenching system, characterized in that : The air-cooled quenching heat treatment industrial furnace according to claim 1 is equipped; the air quenching system comprises a circulating fan (001), a gas nozzle, an air inlet (004), an air cooling component (005) and an air control valve (006); The gas nozzle comprises a blowing nozzle and a matching nozzle (002); There are multiple air blowing nozzles and matching air nozzles (002), both of which are provided with air outlets (003) and are connected to the circulating fan (001); the air blowing nozzles are positioned on the top and side walls of the furnace body (100); The matching air nozzles (002) are positioned on the side wall of the furnace body (100) and are arranged in multiple rows, with each row of matching air nozzles (002) corresponding to a built-in guide rail (120); Most of the gas ejected from the matching air nozzle (002) will enter the side air guide block (220); The air inlet (004) is positioned at the top and / or bottom of the furnace body (100) and is in communication with the air cooling assembly (005); The air cooling component (005) is in communication with the circulating fan (001) and is used to cool the gas flowing through; The air control valve (006) is used to control the opening and closing of the air duct and the size of the air flow volume; during operation, the gas in the furnace enters the air cooling component (005) through the air inlet (004) and is then transported to the circulating fan (001), and then output from the blowing nozzle and the matching nozzle (002) through the air control valve (006).

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