Multi-bin cover type annealing furnace

Abstract

The invention relates to the technical field of annealing furnaces, in particular to a multi-bin cover type annealing furnace which comprises an annealing furnace outer heat insulation cover, a sealing cover is arranged above the annealing furnace outer heat insulation cover, a base is arranged at the bottom of the annealing furnace outer heat insulation cover, and an annealing furnace inner chamber is arranged in the annealing furnace outer heat insulation cover. An inner heat insulation cover assembly is arranged on the outer side of the annealing furnace inner chamber; the thermal insulation cover has the beneficial effects that the inner thermal insulation cover assembly is arranged on the outer side of the inner chamber of the annealing furnace, and the driving gear assembly drives the deformation ring plate to rotate, so that the thermal insulation cover unit pieces are moved to be gathered or dispersed under the limiting cooperation of the limiting thermal insulation plate, and when the inner chamber of the annealing furnace is heated, the thermal insulation cover unit pieces are gathered to form a thermal insulation cover; when a workpiece needs to be cooled, the heat shield unit moves and disperses, the gas is immediately dispersed, the pressure intensity is reduced, spray water is vaporized through the cooling spray ring pipe to absorb heat for cooling, the heat is taken out along with gas discharge, and the interior of the inner chamber of the annealing furnace is uniformly cooled.

Description

Technical Field

[0001] The invention relates to the technical field of annealing furnaces, in particular to a multi-chamber hood-type annealing furnace. Background Art

[0002] Annealing is a common process in material processing. In order to achieve certain characteristics, such as reducing the hardness of the workpiece and improving its plasticity, the workpiece needs to be heated, maintained for a period of time, and then slowly cooled down to obtain this property. The annealing furnace is an indispensable processing equipment in the annealing process. The hood annealing furnace belongs to the bright annealing process. Before annealing, the air in the tank is extracted, and nitrogen or inert gas is filled in. Then, it is powered on for heating, and it is burned to a certain degree, maintained at a certain degree for a certain time, and then gradually cooled down naturally. The hood annealing furnace in the prior art achieves heating or cooling by exchanging the heating hood and the cooling hood. The operation is cumbersome and there are safety hazards. In addition, the temperature in the annealing furnace is uneven, resulting in poor annealing effect.

[0003] The existing Chinese patent document with publication number CN108285967A proposes to solve the above problems by setting up a heating and cooling cover with heating elements and cooling pipes in the inner interlayer. However, the heating pipe and the cooling pipe will work alternately in the same interlayer, which will cause the temperature of the cover to change rapidly, the temperature difference between the surface layers to be large, and thermal stress will be generated, which is easy to cause deformation.

[0004] Therefore, the present invention proposes a multi-chamber hood-type annealing furnace to solve the problem in the prior art that the heating tube and the cooling tube are in the same interlayer and work alternately, which will cause the temperature of the hood to change rapidly, the temperature difference between the surface layers to be large, thermal stress to cause deformation easily, and a three-layer hood-type structure is designed with a deformable isolation hood in the middle to separate the heating tube and the cooling tube to avoid micro-deformation of the hood due to the large temperature difference between heating and cooling. Summary of the invention

[0005] The object of the present invention is to provide a multi-chamber hood type annealing furnace to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: comprising an annealing furnace outer heat insulation cover, a closing cover is arranged above the annealing furnace outer heat insulation cover, a base is arranged at the bottom of the annealing furnace outer heat insulation cover, an annealing furnace inner chamber is arranged inside the annealing furnace outer heat insulation cover, an inner heat insulation cover assembly is arranged outside the annealing furnace inner chamber, a cooling spray ring pipe is arranged outside the annealing furnace outer heat insulation cover, a backflow cover adapted to the cooling spray ring pipe is fixedly installed on the inner surface of the annealing furnace outer heat insulation cover, the annealing furnace inner chamber is fixedly installed above the bottom of the annealing furnace outer heat insulation cover, a heating pipe is fixedly installed outside the annealing furnace inner chamber, the inner heat insulation cover assembly comprises limiting heat insulation plates symmetrically fixedly installed at the upper and lower inner ends of the annealing furnace outer heat insulation cover, a deformable ring plate is arranged inside the limiting heat insulation plate, and a heat insulation cover unit component is movably installed between the deformable ring plates.

[0007] Preferably, a reinforcement frame is fixedly installed on the inner side wall of the heat insulation cover unit, a heat dissipation groove is provided on the side wall of the reinforcement frame, a sliding rod is fixedly installed on the upper and lower ends of the reinforcement frame, a limiting groove matched with the sliding rod is provided on the inner wall of the limiting heat insulation plate, and an arc-shaped sliding groove matched with the sliding rod is provided on the inner side of the deformable ring plate.

[0008] Preferably, an anti-deformation frame is fixedly installed on the outer side of the inner chamber of the annealing furnace, reinforcement columns are evenly distributed in the middle of the anti-deformation frame, and a resistance pad matched with the reinforcement columns is fixedly installed on the inner wall of the reinforcement frame. A human-shaped frame is fixedly installed on the upper and lower ends of the anti-deformation frame, a sealing cover is fixedly installed on the outer side of the human-shaped frame, and sealed inner baffles matched with the sealing cover are fixedly installed on both sides of the inner surface of the heat insulation cover unit.

[0009] Preferably, the deformable ring plate is rotatably mounted on the outer surface of the anti-deformation frame, a driving gear assembly is provided on one side of the inner wall of the outer heat insulation cover of the annealing furnace, the outer surface of the driving gear assembly is meshed with the outer surface of the deformable ring plate, and a driving motor that drives the driving gear assembly to rotate is fixedly mounted on the upper surface of the outer heat insulation cover of the annealing furnace.

[0010] Preferably, a workpiece annealing rack is slidably installed on the inner side of the inner chamber of the annealing furnace, a threaded rod 1 is rotatably installed on the inner wall of one side of the inner chamber of the annealing furnace, a limiting rod matched with the threaded rod 1 is provided on the other side of the inner chamber of the annealing furnace, the inner wall of one side of the workpiece annealing rack is threadedly connected to the outer surface of the threaded rod 1, and the inner wall of the other side of the workpiece annealing rack is slidably connected to the outer surface of the limiting rod.

[0011] Preferably, a vacuum tube is fixedly installed in the middle of the bottom inner wall of the outer heat insulation cover of the annealing furnace, and a gas injection ring tube is fixedly installed on the outer side of the bottom inner wall of the outer heat insulation cover of the annealing furnace. The upper ends of the vacuum tube and the gas injection ring tube both penetrate the bottom inner wall of the annealing furnace inner chamber, one end of the vacuum tube is provided with the annealing furnace inner chamber, and one end of the gas injection ring tube is provided with an inert gas storage tank.

[0012] Preferably, an exhaust valve is provided above the inner side wall of the outer heat insulation cover of the annealing furnace, a filter tube is fixedly installed at one end of the exhaust valve, a gas recovery exhaust pipe is fixedly installed above the side wall of the filter tube close to the exhaust valve, and a movable cover is fixedly installed at the end of the filter tube away from the exhaust valve by bolts.

[0013] Preferably, an extrusion cover is provided on the inner side of the movable cover, a threaded rod 2 is rotatably mounted on the outer surface of the extrusion cover, and the outer surface of the threaded rod 2 is threadedly connected to the inner wall of the movable cover.

[0014] Preferably, a cohesive heat cover is fixedly installed in the middle of the filter tube, an exhaust hole is provided at one end of the cohesive heat cover close to the extrusion cover, a filter sponge is sleeved on the outer surface of the cohesive heat cover, a slide groove adapted to the cohesive heat cover is provided on the side wall of the extrusion cover, and a movable filter screen and a fixed filter screen are respectively provided on both sides of the filter sponge.

[0015] Preferably, one side surface of the movable filter screen contacts one side of the extrusion cover, the movable filter screen is movably installed on the outside of the cohesive heat cover, the fixed filter screen is fixedly installed on the outside of the cohesive heat cover, and the bottom of the inner wall of the filter tube close to the movable cover is provided.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The annealing furnace inner chamber is provided with an annealing furnace inner chamber for placing and heating workpieces, a vacuum machine is used to evacuate and then an inert gas is injected through an inert gas storage tank to maintain pressure, an inner heat insulation cover assembly is provided on the outer side of the annealing furnace inner chamber, and a deformable ring plate is driven to rotate by a driving gear assembly so that the heat insulation cover units are moved, gathered or dispersed in the limited cooperation of the limited heat insulation plate, when the annealing furnace inner chamber is heated, the heat insulation cover units are gathered into a heat-insulating cover, so that the temperature inside the annealing furnace inner chamber rises rapidly, when the workpiece needs to dissipate heat, the heat insulation cover units are moved and dispersed, the gas is immediately dispersed and the pressure is reduced, and water vaporization is performed through a cooling spray ring pipe to absorb heat for heat dissipation, and the heat is discharged with the gas, so that the inside of the annealing furnace inner chamber is uniformly cooled, and the heating and cooling processes are not interfered with each other by the deformation and separation of the heat insulation cover units, which solves the problem that the heating pipe and the cooling pipe are in the same interlayer and work alternately, which leads to a rapid change in the temperature of the cover body, a large temperature difference between the surface layers, thermal stress, and easy deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall front structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall rear structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the overall bottom-up structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the top view structure of the present invention.

[0022] Figure 5 The figure is a schematic diagram of the top view of the interior of the outer heat insulation cover of the annealing furnace of the present invention.

[0023] Figure 6 This is a schematic diagram of the disassembled structure of the inner chamber of the annealing furnace of the present invention.

[0024] Figure 7 It is a schematic diagram of the gathered structure of the heat insulation cover unit components of the present invention.

[0025] Figure 8 It is a schematic diagram of the dispersed structure of the heat shield unit of the present invention.

[0026] Fig. 9 It is a schematic diagram of the top view of the structure of the heat insulation cover unit components in the gathered state of the present invention.

[0027] Fig.10 It is a schematic diagram of the comparative structure of the gathered and dispersed heat insulation cover unit components of the present invention.

[0028] Fig.11 It is a schematic diagram of the structure of the heat insulation cover unit of the present invention.

[0029] Fig.12 It is a schematic diagram of the structure of the anti-deformation frame of the present invention.

[0030] Fig.13 It is a schematic diagram of the inner chamber structure of the annealing furnace of the present invention.

[0031] Fig.14 This is a schematic diagram of the disassembled top view of the workpiece annealing rack of the present invention.

[0032] Fig.15 It is a schematic structural diagram of the workpiece annealing rack of the present invention.

[0033] Fig.16 It is a schematic diagram of the filter tube structure of the present invention.

[0034] Fig.17 This is a schematic diagram of the split structure of the filter tube of the present invention.

[0035] In the figure: 1. Insulation cover outside the annealing furnace; 2. Cooling spray ring pipe; 21. Backflow cover; 3. Exhaust valve;

[0036] 4. Filter tube; 41. Gas recovery and discharge pipe; 42. Movable cover; 421. Extrusion cover; 422. Threaded rod 2; 43. Cohesive heat cover; 44. Filter sponge; 45. Movable filter; 451. Fixed filter; 5. Annealing furnace chamber; 51. Heating tube; 52. Workpiece annealing rack; 53. Threaded rod 1; 6.

[0037] Vacuum machine; 61. Vacuum tube; 7. Inert gas storage tank; 71. Gas injection ring tube; 8. Inner heat insulation cover assembly; 81. Limiting heat insulation board; 82. Deformation ring plate; 83. Driving gear assembly; 84. Heat insulation cover unit; 841. Reinforcement frame; 842. Sliding rod; 843. Resistance pad; 844. Sealed inner partition; 9. Anti-deformation frame; 91. Reinforcement column; 92. Human frame; 93. Sealing cover. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] For example, see Figure 1-Figure 17The present invention provides a technical solution: comprising an annealing furnace outer heat insulation cover 1, a closed cover is arranged above the annealing furnace outer heat insulation cover 1, a base is arranged at the bottom of the annealing furnace outer heat insulation cover 1, an annealing furnace inner chamber 5 is arranged inside the annealing furnace outer heat insulation cover 1, an inner heat insulation cover assembly 8 is arranged outside the annealing furnace inner chamber 5, a cooling spray ring pipe 2 is arranged outside the annealing furnace outer heat insulation cover 1, a backflow cover 21 adapted to the cooling spray ring pipe 2 is fixedly installed on the inner surface of the annealing furnace outer heat insulation cover 1, and the annealing furnace inner chamber 5 is fixedly installed Above the bottom of the outer heat insulation cover 1 of the annealing furnace, a heating tube 51 is fixedly installed on the outer side of the inner chamber 5 of the annealing furnace, and the inner heat insulation cover assembly 8 includes a limiting heat insulation plate 81 symmetrically fixedly installed on the upper and lower inner ends of the outer heat insulation cover 1 of the annealing furnace, and a deformable ring plate 82 is arranged on the inner side of the limiting heat insulation plate 81. A heat insulation cover unit 84 is movably installed between the deformable ring plates 82. A reinforcing frame 841 is fixedly installed on the inner side wall of the heat insulation cover unit 84. A heat dissipation groove is opened on the side wall of the reinforcing frame 841. The upper and lower ends of the reinforcing frame 841 are fixed. A sliding rod 842 is installed, a limiting groove adapted to the sliding rod 842 is opened on the inner wall of the limiting heat insulation plate 81, an arc-shaped sliding groove adapted to the sliding rod 842 is opened on the inner side of the deformation ring plate 82, an anti-deformation frame 9 is fixedly installed on the outer side of the inner chamber 5 of the annealing furnace, reinforcement columns 91 are evenly distributed in the middle of the anti-deformation frame 9, and a resisting pad 843 adapted to the reinforcement column 91 is fixedly installed on the inner side wall of the reinforcement frame 841. The upper and lower ends of the anti-deformation frame 9 are respectively fixedly installed with a human-shaped frame 92, and the human-shaped frame 92 A sealing cover 93 is fixedly installed on the outside, and sealing inner baffles 844 adapted to the sealing cover 93 are fixedly installed on both sides of the inner surface of the heat insulation cover unit 84, respectively. The deformable ring plate 82 is rotatably installed on the outer surface of the anti-deformation frame 9, and a driving gear assembly 83 is arranged on one side of the inner wall of the annealing furnace outer heat insulation cover 1. The outer surface of the driving gear assembly 83 is meshed with the outer surface of the deformable ring plate 82, and a driving motor for driving the driving gear assembly 83 to rotate is fixedly installed on the upper surface of the annealing furnace outer heat insulation cover 1;In this embodiment, the heat insulation cover 1 outside the annealing furnace has the function of heat preservation and heat insulation. The heat insulation cover unit element 84 forms a complete heat insulation cover that can separate the annealing furnace inner chamber 5 and the cooling spray ring tube 2, so that the cooling and heating processes are completely separated. When the annealing furnace inner chamber 5 is heated, the driving motor drives the driving gear assembly 83 to rotate, and the driving gear assembly 83 drives the deforming ring plate 82 to rotate so that the heat insulation cover unit element 84 moves and gathers the heat preservation and heat insulation cover to seal the annealing furnace inner chamber 5. At this time, the vacuum machine 6 evacuates the vacuum and then injects inert gas through the inert gas storage tank 7 to maintain the pressure so that the inside of the annealing furnace inner chamber 5 is in a high-pressure environment. The heating tube 51 works to rapidly increase the temperature inside the annealing furnace inner chamber 5 to heat and keep the workpiece warm. After the insulation is completed, when the workpiece needs to dissipate heat, the driving gear assembly 83 rotates in the opposite direction driven by the driving motor, and the heat insulation cover unit element 84 moves and disperses under the cooperation of the deforming ring plate 82 and the limiting insulation plate 81, and the gas immediately passes through the heat insulation cover unit element 8 4, the pressure between them is reduced, the anti-deformation frame 9 plays a role of reinforcement, the abutment pad 843 on the inner side of the reinforcement frame 841 abuts against the reinforcement column 91 when gathered and deforms when vacuuming, the anti-deformation frame 9 fixes the sealing cover 93 through the human frame 92, and the sealing inner partition 844 is engaged when the heat insulation cover unit 84 is gathered to increase the sealing between the heat insulation cover unit 84, the triangular frame structure of the reinforcement frame 841 improves the strength of the heat insulation cover unit 84, and increases the pressure resistance of the heat insulation cover unit 84, while facilitating heat transfer and gas cooling, the backflow cover 21 makes the cooling spray ring pipe 2 spray uniformly from both sides, and the gas discharged through the heat dissipation grooves on both sides of the reinforcement frame 841 generates convection, the spray water vaporizes and absorbs heat for heat dissipation, and takes out heat with the gas discharge, so that the inner chamber 5 of the annealing furnace is uniformly cooled, which solves the problem that the heating pipe and the cooling pipe are in the same interlayer and work alternately in the prior art, which will cause the temperature of the cover to change rapidly, the temperature difference between the surface layers is large, and the thermal stress is generated, which is easy to deform. ;

[0040] Embodiment 2: On the basis of embodiment 1, it is further proposed that a workpiece annealing rack 52 is slidably installed on the inner side of the annealing furnace inner chamber 5, a threaded rod 53 is rotatably installed on the inner wall of one side of the annealing furnace inner chamber 5, and a limiting rod matched with the threaded rod 53 is arranged on the other side of the annealing furnace inner chamber 5, the inner wall of one side of the workpiece annealing rack 52 is threadedly connected with the outer surface of the threaded rod 53, and the inner wall of the other side of the workpiece annealing rack 52 is slidably connected with the outer surface of the limiting rod, a vacuum tube 61 is fixedly installed on the middle part of the bottom inner wall of the annealing furnace outer heat insulation cover 1, a gas injection ring tube 71 is fixedly installed on the outer side of the bottom inner wall of the annealing furnace outer heat insulation cover 1, the upper ends of the vacuum tube 61 and the gas injection ring tube 71 both penetrate the bottom inner wall of the annealing furnace inner chamber 5, one end of the vacuum tube 61 is arranged with the annealing furnace inner chamber 5, and one end of the gas injection ring tube 71 is arranged with an inert gas storage tank 7; in this embodiment, the workpiece annealing rack 52 mainly plays the role of placing metal workpieces. By rotating the threaded rod 53, the workpiece annealing rack 52 slides under the limit cooperation of the limit rod, so that the workpiece can enter or exit the annealing furnace inner chamber 5, avoiding disassembly of the annealing furnace inner chamber 5 to install the workpiece. The annealing furnace inner chamber 5 separates the heating tube 51, but its inner wall is provided with a through groove, so that the heat of the heating tube 51 is transferred around the annealing furnace inner chamber 5 to heat the workpiece. The vacuum machine 6 can extract the air inside the annealing furnace inner chamber 5 through the vacuum tube 61. The inert gas storage tank 7 evenly injects inert gas into the annealing furnace inner chamber 5 through the gas injection ring tube 71 to maintain the pressure inside the annealing furnace inner chamber 5 to protect the metal workpiece, further solving the problem in the prior art that the heating tube and the cooling tube are in the same interlayer and work alternately, which will cause the cover body temperature to change rapidly, the temperature difference between the surface layers is large, and thermal stress is generated, which is easy to cause deformation.

[0041] Embodiment 3, on the basis of embodiment 2, further proposes to add a wedge-shaped limit clamp on the upper surface of the workpiece annealing rack 52, the lower end of the wedge-shaped limit clamp is fixedly installed with a sliding spherical column, and a circular limit slide groove compatible with the sliding spherical column is provided on the upper surface of the workpiece annealing rack 52; in this embodiment, when the workpiece is placed on the workpiece annealing rack 52, the wedge-shaped limit clamp can be moved, and with the cooperation of the circular limit slide groove, the wedge-shaped limit clamp can be moved around any position on the upper surface of the workpiece annealing rack 52, and clamp and limit the workpiece according to the shape or state of the workpiece, for example, clamping a columnar workpiece, so that the applicability of the workpiece annealing rack 52 is greatly improved, and the workpiece is more stable during annealing, and the problem of the prior art that the heating tube and the cooling tube are in the same interlayer and work alternately, which will cause the temperature of the cover to change rapidly, the temperature difference between the surface layers is large, and thermal stress is generated, which is easy to cause deformation.

[0042] Embodiment 4, on the basis of embodiment 3, further proposes to add transverse displacement grooves between the circular slide grooves of the workpiece annealing rack 52, and symmetrically add limiting metal pop-up plates inside the transverse displacement grooves; in this embodiment, the transverse displacement grooves can enable the wedge-shaped limiting clamp to move and adjust its position between the circular limiting slide grooves, so that the wedge-shaped limiting clamp can be located on the same circular limiting slide groove to clamp and fix the workpiece, and can also enable the wedge-shaped limiting clamp to be evenly dispersed on different circular limiting slide grooves, and the metal pop-up plates enable the movement of the wedge-shaped limiting clamp on different circular limiting slide grooves to have an extrusion limiting effect, so that the wedge-shaped limiting clamp can only be displaced under the action of external force, making the wedge-shaped limiting clamp more stable, facilitating the separation and clamping of the metal coil, increasing the versatility of the workpiece annealing rack 52, and further solving the problem in the prior art that the heating tube and the cooling tube are in the same interlayer and work alternately, which will cause the cover body temperature to change rapidly, the temperature difference between the surface layers to be large, and thermal stress to be generated, which is easy to cause deformation.

[0043] Embodiment 5, on the basis of embodiment 4, it is further proposed that an exhaust valve 3 is arranged above the inner side wall of the heat insulation cover 1 outside the annealing furnace, a filter tube 4 is fixedly installed at one end of the exhaust valve 3, a gas recovery exhaust pipe 41 is fixedly installed above the side wall of the filter tube 4 close to the exhaust valve 3, a movable cover 42 is fixedly installed at one end of the filter tube 4 away from the exhaust valve 3, an extrusion cover 421 is arranged on the inner side of the movable cover 42, a threaded rod 422 is rotatably installed on the outer surface of the extrusion cover 421, the outer surface of the threaded rod 422 is threadedly connected to the inner wall of the movable cover 42, and a filter tube 41 is fixedly installed in the middle of the filter tube 4. The cohesive heat shield 43 has an exhaust hole at one end of the cohesive heat shield 43 close to the extrusion shield 421, a filter sponge 44 is sleeved on the outer surface of the cohesive heat shield 43, a slide groove adapted to the cohesive heat shield 43 is provided on the side wall of the extrusion shield 421, and a movable filter screen 45 and a fixed filter screen 451 are respectively provided on both sides of the filter sponge 44, one side surface of the movable filter screen 45 is in contact with one side of the extrusion shield 421, the movable filter screen 45 is movably installed on the outer side of the cohesive heat shield 43, the fixed filter screen 451 is fixedly installed on the outer side of the cohesive heat shield 43, and the inner wall of the filter tube 4 close to the movable cover 42 The bottom is provided with 46; in this embodiment, the exhaust valve 3 is opened to discharge the gas inside the heat insulation cover 1 outside the annealing furnace into the filter tube 4, and the gas first enters the cohesive heat cover 43. The cohesive heat cover 43 is provided with multiple layers of folds. When the gas circulates, the heat contained in the gas can be collected and stored and exported to the filter sponge 44, so as to promote the drying of the movable filter 45. The gas is discharged through the exhaust hole of the cohesive heat cover 43 and filtered by the adsorption of the filter sponge 44. The filter sponge 44 absorbs the water vapor, and the movable filter 45 and the fixed filter 451 intercept and filter the impurities, and then the gas passes through the gas The water is discharged from the recovery discharge pipe 41 for collection and waiting for subsequent processing and secondary utilization. By rotating the threaded rod 422 to push the extrusion cover 421 inward, the movable filter screen 45 can be squeezed to make the movable filter screen 45 squeeze the filter sponge 44 and cooperate with the fixed filter screen 451 to make the filter sponge 44 discharge water more quickly. The movable cover 42 is fixed with bolts for easy disassembly, and the components inside the filter tube 4 are cleaned, which further solves the problem in the prior art that the heating tube and the cooling tube are in the same interlayer and work alternately, which will cause the temperature of the cover body to change rapidly, the temperature difference between the surface layers is large, thermal stress is generated, and deformation is easy to occur.

[0044] Embodiment 6. On the basis of embodiment 5, this embodiment further proposes a specific method for using a multi-chamber hood-type annealing furnace, comprising the following steps: Step 1, workpiece installation, a metal workpiece is placed on the workpiece annealing rack 52, and the workpiece annealing rack 52 is slid under the limit cooperation of the limit rod by rotating the threaded rod 1 53, so that the workpiece enters the inner chamber 5 of the annealing furnace, and the upper closing cover is closed, and the driving motor drives the driving gear assembly 83 to rotate, and the driving gear assembly 83 drives the deformation ring plate 82 to rotate so that the heat insulation cover unit 84 moves in the limit cooperation of the limit insulation plate 81, and the heat insulation cover is gathered to the inner chamber 5 of the annealing furnace. Sealing; Step 2, heating process, the vacuum machine 6 can extract the air inside the annealing furnace chamber 5 through the vacuum tube 61, the inert gas storage tank 7 evenly injects inert gas into the annealing furnace chamber 5 through the gas injection ring tube 71 to maintain the pressure inside the annealing furnace chamber 5, the heating tube 51 starts to heat the annealing furnace chamber 5 to quickly increase the temperature, and after reaching the predetermined temperature, it is kept warm for a predetermined time; Step 3, cooling and cooling process, after the insulation is completed, when the workpiece needs to dissipate heat, the driving gear assembly 83 rotates in the opposite direction driven by the driving motor, and the heat insulation cover unit 84 rotates between the deformation ring plate 82 and the limiting heat insulation plate 81 moves and disperses, and the gas immediately disperses through the heat insulation cover unit element 84 to reduce the pressure, and the cooling spray ring pipe 2 is started to spray. The backflow cover 21 makes the cooling spray ring pipe 2 spray out evenly from both sides, and the gas discharged through the heat dissipation grooves on both sides of the reinforcing frame 841 generates convection, and the spray water vaporizes and absorbs heat to dissipate heat, and as the exhaust valve 3 is opened, the gas is discharged and the heat is taken out, so that the inside of the annealing furnace 5 is evenly cooled; step four, gas recovery, the exhaust valve 3 is opened to allow the gas inside the heat insulation cover 1 outside the annealing furnace to be discharged into the filter tube 4, and the gas will first enter the cohesive heat cover 43, and the cohesive heat cover 4 3. When the gas circulates, the heat contained in the gas can be collected and stored and exported to the filter sponge 44 to promote the drying of the movable filter screen 45. The gas is discharged through the exhaust hole of the cohesive heat shield 43 and filtered by the adsorption of the filter sponge 44. The filter sponge 44 adsorbs the water vapor, and the movable filter screen 45 and the fixed filter screen 451 intercept and filter the impurities. Then the gas is discharged through the gas recovery and discharge pipe 41 for collection and waiting for subsequent processing and secondary utilization. Step 5. After the workpiece is withdrawn and the cooling is completed, the closing cover is opened, and the threaded rod 53 is rotated in the opposite direction to make the workpiece annealing rack 52 rise, and the workpiece can be taken out.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-chamber hood type annealing furnace, comprising an annealing furnace outer heat insulation cover (1), a closing cover is arranged above the annealing furnace outer heat insulation cover (1), and a base is arranged at the bottom of the annealing furnace outer heat insulation cover (1), characterized in that: An annealing furnace inner chamber (5) is arranged inside the annealing furnace outer heat insulation cover (1), an inner heat insulation cover assembly (8) is arranged outside the annealing furnace inner chamber (5), a cooling spray ring tube (2) is arranged outside the annealing furnace outer heat insulation cover (1), a backflow cover (21) adapted to the cooling spray ring tube (2) is fixedly installed on the inner surface of the annealing furnace outer heat insulation cover (1), the annealing furnace inner chamber (5) is fixedly installed above the bottom of the annealing furnace outer heat insulation cover (1), a heating pipe (51) is fixedly installed outside the annealing furnace inner chamber (5), and the inner heat insulation cover assembly (8) comprises a limiting heat insulation plate (81) symmetrically fixedly installed on the upper and lower inner ends of the annealing furnace outer heat insulation cover (1), a deformable ring plate (82) is arranged inside the limiting heat insulation plate (81), and a heat insulation cover unit component (84) is movably installed between the deformable ring plates (82).

2. A multi-chamber hood-type annealing furnace according to claim 1, characterized in that: A reinforcing frame (841) is fixedly mounted on the inner wall of the heat insulation cover unit (84), a heat dissipation groove is provided on the side wall of the reinforcing frame (841), a sliding rod (842) is fixedly mounted on the upper and lower ends of the reinforcing frame (841), a limiting groove matched with the sliding rod (842) is provided on the inner wall of the limiting heat insulation plate (81), and an arc-shaped sliding groove matched with the sliding rod (842) is provided on the inner side of the deformable ring plate (82).

3. A multi-chamber hood-type annealing furnace according to claim 2, characterized in that: An anti-deformation frame (9) is fixedly mounted on the outer side of the inner chamber (5) of the annealing furnace, reinforcement columns (91) are evenly distributed in the middle of the anti-deformation frame (9), a contact pad (843) matched with the reinforcement columns (91) is fixedly mounted on the inner side wall of the reinforcement frame (841), a human-shaped frame (92) is fixedly mounted on the upper and lower ends of the anti-deformation frame (9), a sealing cover (93) is fixedly mounted on the outer side of the human-shaped frame (92), and sealing inner baffles (844) matched with the sealing cover (93) are fixedly mounted on both sides of the inner surface of the heat insulation cover unit (84).

4. The multi-chamber hood-type annealing furnace according to claim 1, characterized in that: The deformable ring plate (82) is rotatably mounted on the outer surface of the anti-deformation frame (9); a driving gear assembly (83) is provided on one side of the inner wall of the outer heat insulation cover (1) of the annealing furnace; the outer surface of the driving gear assembly (83) is meshed with the outer surface of the deformable ring plate (82); and a driving motor for driving the driving gear assembly (83) to rotate is fixedly mounted on the upper surface of the outer heat insulation cover (1) of the annealing furnace.

5. The multi-chamber hood-type annealing furnace according to claim 1, characterized in that: A workpiece annealing rack (52) is slidably mounted on the inner side of the annealing furnace inner chamber (5); a threaded rod (53) is rotatably mounted on the inner wall of one side of the annealing furnace inner chamber (5); a limiting rod matched with the threaded rod (53) is arranged on the other side of the annealing furnace inner chamber (5); an inner wall of one side of the workpiece annealing rack (52) is threadedly connected to the outer surface of the threaded rod (53); and an inner wall of the other side of the workpiece annealing rack (52) is slidably connected to the outer surface of the limiting rod.

6. The multi-chamber hood-type annealing furnace according to claim 1, characterized in that: A vacuum tube (61) is fixedly installed in the middle of the bottom inner wall of the annealing furnace outer heat insulation cover (1), and a gas injection ring tube (71) is fixedly installed on the outer side of the bottom inner wall of the annealing furnace outer heat insulation cover (1). The upper ends of the vacuum tube (61) and the gas injection ring tube (71) both penetrate the bottom inner wall of the annealing furnace inner chamber (5). One end of the vacuum tube (61) is provided with the annealing furnace inner chamber (5), and one end of the gas injection ring tube (71) is provided with an inert gas storage tank (7).

7. The multi-chamber hood-type annealing furnace according to claim 1, characterized in that: An exhaust valve (3) is arranged above the inner side wall of the outer heat insulation cover (1) of the annealing furnace, a filter tube (4) is fixedly mounted on one end of the exhaust valve (3), a gas recovery exhaust pipe (41) is fixedly mounted above the side wall of the filter tube (4) close to the exhaust valve (3), and a movable cover (42) is fixedly mounted on the end of the filter tube (4) away from the exhaust valve (3) by means of bolts.

8. The multi-chamber hood-type annealing furnace according to claim 7, characterized in that: An extrusion cover (421) is arranged on the inner side of the movable cover (42), a second threaded rod (422) is rotatably mounted on the outer surface of the extrusion cover (421), and the outer surface of the second threaded rod (422) is threadedly connected to the inner wall of the movable cover (42).

9. The multi-chamber hood-type annealing furnace according to claim 7, characterized in that: A cohesive heat shield (43) is fixedly installed in the middle of the filter tube (4); an exhaust hole is arranged at one end of the cohesive heat shield (43) close to the extrusion shield (421); a filter sponge (44) is sleeved on the outer surface of the cohesive heat shield (43); a slide groove matching the cohesive heat shield (43) is provided on the side wall of the extrusion shield (421); and a movable filter screen (45) and a fixed filter screen (451) are respectively arranged on both sides of the filter sponge (44).

10. The multi-chamber hood-type annealing furnace according to claim 9, characterized in that: One side surface of the movable filter (45) contacts one side of the extrusion cover (421); the movable filter (45) is movably mounted on the outside of the cohesive heat cover (43); the fixed filter (451) is fixedly mounted on the outside of the cohesive heat cover (43); and a bottom portion (46) is provided on the inner wall of one side of the filter tube (4) close to the movable cover (42).

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