Box-type annealing furnace

Abstract

The invention relates to the technical field of annealing, in particular to a box-type annealing furnace which comprises a furnace body, a supporting frame used for supporting an annealing piece is arranged in the furnace body, a furnace door is arranged on the surface of one side of the furnace body, and a main heating structure is arranged on the side, opposite to the furnace door, of the inner side of the furnace body. The main heating structure is arranged on the inner side of the furnace body, the auxiliary heating structures are arranged on the four surfaces adjacent to the main heating structure, the auxiliary heating structures are connected with the moving structures driving the auxiliary heating structures to move in the furnace body in the direction close to the furnace door and away from the furnace door, and the effect that materials in the annealing furnace are heated more evenly is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of annealing, and in particular to a box-type annealing furnace. Background Art

[0002] Annealing furnace refers to equipment that heats metal or glass workpieces to a certain temperature, keeps the temperature for a period of time, and then cools them. It includes trolley annealing furnaces, pit annealing furnaces, box annealing furnaces, hood annealing furnaces, etc. Among them, the box annealing furnace is a special equipment used for conventional heat treatment such as quenching, normalizing, annealing, etc. on steel or glass workpieces. It is popular because of its large loading capacity, strong sealing, convenient operation, and ability to improve the performance of the workpiece to prevent its deformation and eliminate internal residual stress, thereby reducing deformation and crack tendency and making the grains more refined and evenly arranged.

[0003] In the prior art, a box-type annealing furnace usually includes a furnace body, a fan, an electrical unit and other components. An insulation layer, a heating unit and the like are arranged in the furnace body. The furnace body is continuously heated by heating units such as resistance wires, and the heat is continuously transported into the furnace body, thereby achieving the purpose of rapid heating. The fan is used to blow air inward in a cycle, so that the heat in the furnace cavity is evenly distributed, avoiding uneven heating and energy consumption and reducing the loss of the workpiece. Uneven heating causes corrosion and loss to the workpiece and even directly causes it to burst, which greatly affects the product quality. Summary of the invention

[0004] The present application provides a box-type annealing furnace in order to make the temperature of the material in the annealing furnace more uniform.

[0005] The above technical objectives of this application are achieved through the following technical solutions: A box-type annealing furnace comprises a furnace body, a support frame for supporting annealing workpieces is arranged inside the furnace body, a furnace door is arranged on one side surface of the furnace body, a main heating structure is arranged on the inner side of the furnace body opposite to the furnace door, auxiliary heating structures are arranged on four surfaces adjacent to the main heating structure arranged on the inner side of the furnace body, and the auxiliary heating structure is connected to a moving structure which drives the auxiliary heating structure to move in the furnace body toward and away from the furnace door.

[0006] By adopting the above scheme, when the material needs to be annealed, the furnace door is opened, the annealing material is placed on the support frame, and then the furnace door is closed, the main heating structure is started, and the auxiliary heating structure is started at the same time. The moving structure drives the auxiliary heating structure to move in the furnace body, so that the annealing material is heated more evenly everywhere, thereby improving the product quality of the annealed parts.

[0007] Optionally, the main heating structure includes a main fan and a main heater. The output end of the main fan is located inside the furnace body and faces the support frame. The main heater is arranged inside the main fan structure so that the wind blown by the main fan passes through the main heater and then blows toward the support frame.

[0008] By adopting the above scheme, when the annealing workpiece is heated, the main fan and the main heater are started, and the main fan circulates inward to blow air, blowing the heat generated by the main heater evenly to the surface of the annealing material, thereby heating the annealing material more evenly.

[0009] Optionally, the output end of the main fan is connected to a ventilation duct, which is parallel to the furnace body and connected to one side of the main fan, and a plurality of air outlets are opened on the side of the ventilation duct close to the support frame. The plurality of air outlets are arranged in an array so that the hot air generated by the fan is evenly blown to the surface of the support frame.

[0010] By adopting the above solution, the hot air flow generated by the main fan is made more dispersed, so that the annealing material is further heated more evenly, and the annealing effect of the material is better.

[0011] Optionally, the ventilation duct is connected to a transverse heating pipe, and there are multiple transverse heating pipes. There are multiple layers of support frames, and the multiple support frames are stacked so that the support frames and the transverse heating pipes are cross-arranged. Ventilation holes are opened on the surface of the transverse heating pipes, so that the hot air generated by the fan passes through the ventilation duct and the heating pipe and is blown to the upper and lower surfaces of the support frame.

[0012] By adopting the above scheme, since the ventilation duct is located on one side of the support frame and the wind blown out of the ventilation duct is parallel to the surface of the annealing material, the heat exchange efficiency is not very high. Therefore, a transverse heating pipe is arranged between the support frames so that the wind blown out from the ventilation holes of the transverse heating pipe can directly blow to the upper and lower surfaces of the annealing workpiece, so that the annealing workpiece is heated more evenly and the heat exchange efficiency is improved at the same time.

[0013] Optionally, the support frame is slidably connected to the furnace body so that the support frame can slide out of the furnace body.

[0014] By adopting the above solution, the support frame can slide out of the furnace body, so that the operator can more conveniently place the material to be annealed on the support frame, thereby making the annealing of the material more convenient.

[0015] Optionally, a guide rod is provided inside the furnace body, the guide rod is slidably connected to the support frame, and a threaded rod is rotatably connected to the opposite side of the guide rod provided on the furnace body, a threaded sleeve is fixedly connected to one side of the support frame, and the threaded sleeve is threadedly connected to the threaded rod.

[0016] By adopting the above solution, the operator can rotate the threaded rod to drive the threaded sleeve to slide along the threaded rod, thereby driving the support frame to slide along the threaded rod. At the same time, the guide rod guides the support frame so that the support rod can slide out of the annealing furnace more smoothly.

[0017] Optionally, a transmission gear is fixedly connected to the threaded rod near one end, and two adjacent transmission gears are meshed with each other, and the threads of two adjacent threaded rods have opposite rotation directions. A first motor for driving the threaded rod to rotate is fixedly connected to one end of one of the threaded rods.

[0018] By adopting the above scheme, the first motor rotates, thereby driving one of the threaded rods to rotate, thereby driving the transmission gear to rotate, and the transmission gear engages with another transmission gear, thereby driving another threaded rod to rotate, thereby driving multiple support frames to move synchronously, making the movement of the support frames smoother.

[0019] Optionally, the furnace body is rotatably connected inside with wheel groups with the same number as the support frames, and each wheel group includes two support wheels. The two support wheels in each group are respectively arranged on the side surfaces of the guide rod and the threaded rod provided on the inner side of the furnace body, and the axes of the two support wheels in each group are the same. The wheel groups are all arranged near the furnace mouth of the annealing furnace, and the support wheels are located below the support frame to support the support frame.

[0020] By adopting the above scheme, in order to enable the support frame to slide out smoothly at the furnace door, the connection between the support frame, the slide rail and the guide rod should be set on the side of the support frame close to the furnace door, which will cause uneven force on the support frame and easily cause damage to the support frame. Therefore, support wheels are set to support the support frame, increase the force points of the support frame, make the force of the support frame more uniform, and the rolling of the support wheels reduces the friction between the support frame and the support frame, so that the movement of the support frame is smoother.

[0021] Optionally, the four surfaces of the inner side of the furnace body adjacent to the main heating structure are provided with slide rails, and the direction of the slide rails is toward the furnace door, and the slide rails are slidably connected to a frame for connecting the auxiliary heating structure, the frame is rectangular, the four auxiliary heating structures are fixedly connected to the frame, and the movable structure is connected to the frame.

[0022] By adopting the above solution, the four auxiliary heating structures are connected by a frame, and slide rails are provided so that the frame can slide along the slide rails, so that the four auxiliary heating structures can slide synchronously toward and away from the furnace door.

[0023] Optionally, the movable structure includes a cylindrical rod, which is rotatably connected to the inner upper surface of the furnace body, the axis of the cylindrical rod is facing the direction of the furnace door, and the cylindrical rod is connected to a second motor that drives the cylindrical rod to rotate. A slide groove is provided on the circumferential surface of the cylindrical rod, and the slide groove is annular. A slider is fixedly connected to the frame, and the slider is slidably connected in the slide groove. When the cylindrical rod rotates, the slider is driven to move in the slide groove, so that the slider moves back and forth between the two ends of the cylindrical rod.

[0024] By adopting the above scheme, when the material needs to be annealed, the second motor rotates, thereby driving the cylindrical rod to rotate, and since the slider is located in the slide groove, the rotation of the cylindrical rod drives the slider to move along the slide groove, thereby driving the slider to slide along the slide groove, and then driving the frame and the auxiliary heating structure to slide along the slide rail, thereby driving the auxiliary heating structure to move back and forth in the furnace body toward the furnace door and away from the furnace door, so that the annealed material is heated more evenly.

[0025] In summary, this application has the following technical effects: 1. By setting up a main heating structure and an auxiliary heating structure, and setting a moving structure to drive the auxiliary heating structure to move, the annealing material can be heated more evenly; 2. By setting up ventilation ducts, the wind blown by the fan can be blown more evenly to the surface of the annealing material, so that the annealing material can be heated more evenly; 3. By setting the support wheels, the force on the support frame is more evenly distributed, which prolongs the service life of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 It is a schematic diagram of the overall structure of this application from another perspective; Figure 3 This is a partial schematic diagram of the internal structure of the furnace body intended to emphasize the application; Figure 4 This application is intended to emphasize the partial structural diagram of the ventilation duct; Figure 5 This is a schematic diagram of a part of the structure of the threaded rod that this application intends to emphasize; Figure 6 This is a partial structural diagram of the application intended to emphasize the framework; Figure 7 This is a partial structural diagram of the slider that this application intends to emphasize.

[0027] In the figure, 1. furnace body; 11. furnace door; 12. guide rod; 13. support wheel; 14. slide rail; 2. support frame; 21. threaded sleeve; 3. main heating structure; 31. main fan; 311. ventilation duct; 312. transverse heating pipe; 32. main heater; 4. moving structure; 41. cylindrical rod; 411. slide groove; 42. second motor; 5. auxiliary heating structure; 6. threaded rod; 61. transmission gear; 62. first motor; 7. frame; 71. slider. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 , Figure 2 and Figure 3 A box-type annealing furnace includes a furnace body 1, a support frame 2 for supporting annealing parts is arranged inside the furnace body 1, a furnace door 11 is arranged on one side of the furnace body 1, a main heating structure 3 is arranged on the inner side of the furnace body 1 opposite to the furnace door 11, and auxiliary heating structures 5 are arranged on the four surfaces adjacent to the main heating structure 3 arranged on the inner side of the furnace body 1, and the auxiliary heating structure 5 is connected to a moving structure 4 that drives the auxiliary heating structure 5 to move in the furnace body 1 toward and away from the furnace door 11. When the material needs to be annealed, the furnace door 11 is opened, the annealing material is placed on the support frame 2, and then the furnace door 11 is closed, the main heating structure 3 is started, and the auxiliary heating structure 5 is started at the same time, and the moving structure 4 drives the auxiliary heating structure 5 to move in the furnace body 1, so that the annealing material is heated more evenly everywhere, thereby improving the product quality of the annealing parts.

[0030] Reference Figure 1 , Figure 2 and Figure 3 The main heating structure 3 includes a main fan 31 and a main heater 32. The output end of the main fan 31 is located inside the furnace body 1, and the output end of the main fan 31 faces the support frame 2. The main heater 32 is arranged inside the main fan 31 structure, so that the wind blown by the main fan 31 passes through the main heater 32 and blows toward the support frame 2. The output end of the main fan 31 is connected to a ventilation duct 311, and the ventilation duct 311 is parallel to the furnace body 1 and connected to one side of the main fan 31. A plurality of air outlets are provided on the side of the ventilation duct 311 close to the support frame 2. The plurality of air outlets are arranged in an array, so that the hot air generated by the fan is evenly blown to the surface of the support frame 2. An exhaust pipe is connected to the surface of one side of the furnace body 1, and the end of the exhaust pipe facing away from the furnace body 1 is connected to the main fan 31, so that the air in the furnace body 1 circulates. When the annealing workpiece is heated, the main fan 31 and the main heater 32 are started, and the main fan 31 circulates to blow air inward. The ventilation duct 311 makes the hot air flow generated by the main fan 31 more dispersed, and blows the heat generated by the main heater 32 evenly to the surface of the annealing material, so that the annealing material is heated more evenly.

[0031] Reference Figure 3 and Figure 4 The ventilation duct 311 is connected with a transverse heating pipe 312, and there are multiple transverse heating pipes 312. The support frame 2 is provided with multiple layers, and the multiple layers of the support frame 2 are stacked, so that the support frame 2 and the transverse heating pipe 312 are arranged crosswise, and ventilation holes are opened on the surface of the transverse heating pipe 312, so that the hot air generated by the fan passes through the ventilation duct 311 and the transverse heating pipe 312 and then blows to the upper and lower surfaces of the support frame 2. Since the ventilation duct 311 is located on one side of the support frame 2, and the wind blown out of the ventilation duct 311 is parallel to the surface of the annealing material, the heat exchange efficiency is not very high, so the transverse heating pipe 312 is arranged between the support frames 2, so that the wind blown out of the ventilation holes of the transverse heating pipe 312 directly blows to the upper and lower surfaces of the annealing workpiece, so that the annealing workpiece is heated more evenly, and the heat exchange efficiency is improved at the same time.

[0032] Reference Figure 3 and Figure 5 A guide rod 12 is provided inside the furnace body 1, and the guide rod 12 is slidably connected to the support frame 2. A threaded rod 6 is rotatably connected to the opposite side of the guide rod 12 provided on the furnace body 1, and a threaded sleeve 21 is fixedly connected to one side of the support frame 2, and the threaded sleeve 21 is threadedly connected to the threaded rod 6. A transmission gear 61 is fixedly connected to the threaded rod 6 near one end, and two adjacent transmission gears 61 are meshed with each other, and the thread rotation directions of the two adjacent threaded rods 6 are opposite. A first motor 62 for driving the threaded rod 6 to rotate is fixedly connected to one end of one of the threaded rods 6. The first motor 62 rotates, thereby driving one of the threaded rods 6 to rotate, thereby driving the transmission gear 61 to rotate, and the transmission gear 61 is meshed with the other transmission gear 61, thereby driving the other threaded rod 6 to rotate, driving the threaded sleeve 21 to slide along the threaded rod 6, thereby driving the support frame 2 to slide along the threaded rod 6, and at the same time, the guide rod 12 guides the support frame 2, so that the support rod can slide out of the annealing furnace more smoothly.

[0033] Reference Figure 5, the furnace body 1 is rotatably connected with a wheel group with the same number as the support frame 2, each wheel group includes two support wheels 13, and the two support wheels 13 of each group are respectively arranged on the side surface of the guide rod 12 and the threaded rod 6 on the inner side of the furnace body 1, and the axes of the two support wheels 13 of each group are the same, and the wheel groups are all arranged near the furnace mouth of the annealing furnace, and the support wheels 13 are located below the support frame 2 to support the support frame 2. In order to enable the support frame 2 to slide out smoothly at the furnace door 11, the connection between the support frame 2 and the slide rail 14 and the guide rod 12 should be arranged on the side of the support frame 2 away from the furnace door 11, which will cause uneven force on the support frame 2 and easily cause damage to the support frame 2. Therefore, the support wheels 13 are arranged to support the support frame 2, increase the force points of the support frame 2, make the force on the support frame 2 more uniform, and the rolling of the support wheels 13 reduces the friction between the support frame 2 and the support frame 2, so that the movement of the support frame 2 is smoother.

[0034] Reference Figure 6 and Figure 7 The auxiliary heating structure 5 includes a heating rod, and the four surfaces of the inner side of the furnace body 1 adjacent to the main heating structure 3 are all provided with a slide rail 14, and the direction of the slide rail 14 is toward the furnace door 11, and the slide rail 14 is slidably connected with a frame 7 for connecting the heating rods, the frame 7 is rectangular, the four heating rods are fixedly connected to the frame 7, and the moving structure 4 is connected to the frame 7. The four heating rods are connected through the frame 7, and the slide rail 14 is provided so that the frame 7 can slide along the slide rail 14, so that the four heating rods can slide synchronously toward and away from the furnace door 11. The movable structure 4 includes a cylindrical rod 41, which is rotatably connected to the inner upper surface of the furnace body 1, the axis of the cylindrical rod 41 is toward the furnace door 11, and the cylindrical rod 41 is connected to a second motor 42 that drives the cylindrical rod 41 to rotate. A slide groove 411 is opened on the circumferential surface of the cylindrical rod 41, and the slide groove 411 is annular. The frame 7 is fixedly connected to a slider 71, and the slider 71 is slidably connected in the slide groove 411. When the cylindrical rod 41 rotates, it drives the slider 71 to move in the slide groove 411, so that the slider 71 moves back and forth between the two ends of the cylindrical rod 41. When the material needs to be annealed, the second motor 42 rotates, thereby driving the cylindrical rod 41 to rotate. Since the slider 71 is located in the slide groove 411, the rotation of the cylindrical rod 41 drives the slider 71 to move along the slide groove 411, thereby driving the slider 71 to slide along the slide groove 411, and then driving the frame 7 and the auxiliary heating structure 5 to slide along the slide rail 14, thereby driving the auxiliary heating structure 5 to move back and forth in the furnace body 1 toward the furnace door 11 and away from the furnace door 11, so that the annealed material is heated more evenly.

[0035] The specific implementation principle of the present application is: when the material needs to be annealed, the furnace door 11 is opened, the first motor 62 rotates to drive the threaded rod 6 to rotate, and at the same time drives the transmission gear 61 to rotate, and the transmission gear 61 drives all the threaded rods 6 to rotate, thereby driving multiple support frames 2 to extend at the furnace door 11, and then the operator places the material on the support frame 2, and then the first motor 62 is reversed to reset the support frame 2, thereby putting the annealing material into the annealing furnace, and then the furnace door 11 is closed, the main fan 31 and the main heater 32 are started, so that the hot air is evenly blown to the surface of the annealing material along the ventilation duct 311 and the transverse heating pipe 312, so that the annealing material is heated more evenly, and at the same time the second motor 42 rotates, the heating rod is heated, and the second motor 42 drives the cylindrical rod 41 to rotate, so that the slider 71 moves along the slide groove 411, thereby driving the frame 7 and the heating rod to slide back and forth along the cylindrical rod 41, so that the annealing material is heated more evenly.

[0036] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A box-type annealing furnace, characterized in that: The invention comprises a furnace body (1), a support frame (2) for supporting annealing workpieces is arranged inside the furnace body (1), a furnace door (11) is arranged on one side surface of the furnace body (1), a main heating structure (3) is arranged on the inner side of the furnace body (1) opposite to the furnace door (11), and auxiliary heating structures (5) are arranged on four surfaces adjacent to the main heating structure (3) arranged inside the furnace body (1), and the auxiliary heating structure (5) is connected to a moving structure (4) for driving the auxiliary heating structure (5) to move in a direction close to the furnace door (11) and away from the furnace door (11) inside the furnace body (1).

2. A box-type annealing furnace according to claim 1, characterized in that: The main heating structure (3) comprises a main fan (31) and a main heater (32); the output end of the main fan (31) is located inside the furnace body (1), and the output end of the main fan (31) faces the support frame (2); the main heater (32) is arranged inside the main fan (31) structure, so that the wind blown out by the main fan (31) passes through the main heater (32) and then blows toward the support frame (2).

3. A box-type annealing furnace according to claim 2, characterized in that: The output end of the main fan (31) is connected to a ventilation duct (311), the ventilation duct (311) is connected to one side of the main fan (31) in parallel with the furnace body (1), and a plurality of air outlets are provided on a side of the ventilation duct (311) close to the support frame (2), the plurality of air outlets being arranged in an array so that the hot air generated by the fan is evenly blown onto the surface of the support frame (2).

4. A box-type annealing furnace according to claim 3, characterized in that: The ventilation duct (311) is connected to a transverse heating pipe (312), a plurality of transverse heating pipes (312) are provided, the support frame (2) is provided with multiple layers, and the multiple layers of the support frame (2) are stacked, the plurality of transverse heating pipes (312) are cross-arranged with the support frame (2), and ventilation holes are provided on the surface of the transverse heating pipe (312), so that the hot air generated by the fan passes through the ventilation duct (311) and the heating pipe and is blown to the upper and lower surfaces of the support frame (2).

5. A box-type annealing furnace according to claim 4, characterized in that: The support frame (2) is slidably connected to the furnace body (1), so that the support frame (2) can slide out of the furnace body (1).

6. A box-type annealing furnace according to claim 5, characterized in that: A guide rod (12) is arranged inside the furnace body (1), the guide rod (12) is slidably connected to the support frame (2), and a threaded rod (6) is rotatably connected to the side opposite to the guide rod (12) arranged on the furnace body (1), and a threaded sleeve (21) is fixedly connected to one side of the support frame (2), and the threaded sleeve (21) is threadedly connected to the threaded rod (6).

7. A box-type annealing furnace according to claim 6, characterized in that: One end of the threaded rod (6) is fixedly connected to a transmission gear (61), and two adjacent transmission gears (61) are meshed with each other. The threads of the two adjacent threaded rods (6) have opposite rotation directions. One end of one of the threaded rods (6) is fixedly connected to a first motor (62) for driving the threaded rod (6) to rotate.

8. A box-type annealing furnace according to claim 8, characterized in that: The furnace body (1) is rotatably connected to a wheel group having the same number as the support frame (2), each wheel group comprising two support wheels (13), the two support wheels (13) of each group being respectively arranged on the side surface of a guide rod (12) and a threaded rod (6) arranged on the inner side of the furnace body (1), and the axes of the two support wheels (13) of each group are the same, and the wheel groups are all arranged near the furnace mouth of the annealing furnace, and the support wheels (13) are located below the support frame (2) for supporting the support frame (2).

9. The box-type annealing furnace according to claim 1, characterized in that: Slide rails (14) are provided on four surfaces of the inner side of the furnace body (1) adjacent to the main heating structure (3), and the direction of the slide rails (14) faces the direction of the furnace door (11). The slide rails (14) are slidably connected to a frame (7) for connecting the auxiliary heating structure (5), and the frame (7) is rectangular. The four auxiliary heating structures (5) are fixedly connected to the frame (7), and the movable structure (4) is connected to the frame (7).

10. A box-type annealing furnace according to claim 9, characterized in that: The moving structure (4) comprises a cylindrical rod (41), the cylindrical rod (41) being rotatably connected to the inner upper surface of the furnace body (1), the axis of the cylindrical rod (41) being oriented toward the furnace door (11), and the cylindrical rod (41) being connected to a second motor (42) for driving the cylindrical rod (41) to rotate, a sliding groove (411) being provided on the circumferential surface of the cylindrical rod (41), and the sliding groove (411) being annular, a sliding block (71) being fixedly connected to the frame (7), and the sliding block (71) being slidably connected in the sliding groove (411), and when the cylindrical rod (41) rotates, the sliding block (71) is driven to move in the sliding groove (411), so that the sliding block (71) moves back and forth between the two ends of the cylindrical rod (41).

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