Annealing aging furnace

Abstract

The utility model provides an annealing aging furnace. The annealing aging furnace comprises a furnace body, the furnace body is provided with a furnace door, a heating chamber is arranged in the furnace body, the bottom face of the heating chamber is open, an air channel is formed between the inner wall of the furnace body and the outer wall of the heating chamber, and a heating unit is arranged on the inner wall of the furnace body and arranged in the air channel between the inner wall of the furnace body and the outer wall of the heating chamber. An air return device is arranged between the top surface of the furnace body and the top surface of the heating chamber, is communicated with the inner cavity of the heating chamber, and sucks air in the heating chamber into an air duct between the inner wall of the furnace body and the outer wall of the heating chamber. A feeding device is arranged on the bottom face of the heating chamber. The air return device sucks upper hot air into the air duct between the inner wall of the furnace body and the outer wall of the heating chamber, and the hot air is heated by the heating unit in the air duct and enters the heating chamber from the bottom of the heating chamber along the heating air duct to form air circulation. According to the utility model, the temperature in the heating chamber is uniform, the temperature control is accurate, and ideal annealing and aging effects of workpieces can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of metal heat treatment, in particular to an annealing aging furnace. Background Art

[0002] In the production process, annealing and aging are two important means in the heat treatment process of metal materials. They each play an important role in production, and in some cases are used in combination to optimize material properties. Annealing and aging furnaces are metal heat treatment equipment used for annealing and aging. They heat the metal material in the furnace body and keep it at this temperature for a period of time before slowly cooling it. Annealing and aging furnaces usually require a high-precision temperature control system and uniform temperature distribution. Existing annealing and aging furnaces have uneven temperature distribution due to air duct design problems and are not suitable for mass production.

[0003] Therefore, the above situation needs to be resolved urgently. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides an annealing aging furnace.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides an annealing and aging furnace, including a furnace body. The furnace body is provided with a furnace door, a heating chamber is provided in the furnace body, the bottom surface of the heating chamber is opened, an air duct is formed between the inner wall of the furnace body and the outer wall of the heating chamber, a heating unit is provided in the inner wall of the furnace body, and the heating unit is arranged in the air duct between the inner wall of the furnace body and the outer wall of the heating chamber. A return air device is provided between the top surface of the furnace body and the top surface of the heating chamber, the return air device is connected with the inner cavity of the heating chamber, and the return air device draws the air in the heating chamber into the air duct between the inner wall of the furnace body and the outer wall of the heating chamber. A feeding device is provided on the bottom surface of the heating chamber. During the annealing and aging process, the furnace door provided on the furnace body is opened, and the workpiece is fed into the heating chamber through the feeding device. The furnace door is closed, and the annealing and aging furnace is started. The heating unit provided on the inner wall of the furnace body starts heating, and the return air device draws the air in the heating chamber into the air duct between the inner wall of the furnace body and the inner wall of the heating chamber. The air passes through the heating unit provided on the inner wall of the furnace body downward along the air duct for heating, and then the air enters the heating chamber from the lower end opening of the heating chamber to heat the workpiece. A plurality of temperature sensing heads are arranged inside the heating chamber, and the control system adjusts the switch of the heating unit in real time according to the temperature detected by the temperature sensing head, thereby accurately controlling the temperature inside the heating chamber. The hot air has a lower density due to its expansion, and the hot air will rise, while the cold air will fall, resulting in a phenomenon in which the temperature in the upper part of the furnace body is higher and the temperature in the lower part is lower. The utility model is provided with a return air device at the top of the furnace body, and the hot air in the upper part is drawn into the air duct between the inner wall of the furnace body and the outer wall of the heating chamber. The hot air is heated by the heating unit in the air duct, and enters the heating chamber from the bottom of the heating chamber along the heating air duct, forming an air circulation. The air heated by the heating unit enters from the lower part of the heating chamber, at which time the air temperature is the highest, and enters the bottom of the heating chamber where the temperature is relatively the lowest in the heating chamber, which can rapidly increase the temperature of the bottom of the heating chamber, and under the action of the return air device and the thermal convection effect, the air with a lower temperature at the bottom of the heating chamber can be brought into the return air device, enter the air duct, and be heated by the heating device arranged in the air duct. The utility model has a uniform temperature inside the furnace body, and the temperature control is accurate, and the workpiece can achieve an ideal annealing and aging effect.

[0006] Furthermore, in the above-mentioned annealing and aging furnace, the return air device includes an air inlet, a duct, an air outlet, and a motor. The air inlet is arranged at the top of the heating chamber, the air inlet is connected to the inner cavity of the heating chamber, the air outlet is arranged in the air duct, a motor is arranged at the top of the furnace body, the motor is arranged in the air outlet, the duct connects the air outlet and the air inlet, and a fan blade is installed on the motor shaft. During annealing and aging, the motor is started, and the motor drives the fan blades installed on the motor shaft to rotate to extract the air in the duct from the air outlet, the air inlet generates suction, and the hot air enters the duct from the heating chamber through the air inlet and is discharged from the air outlet.

[0007] Furthermore, in the above-mentioned annealing furnace, there are two or more return air devices, and the return air devices are separated by partitions. There are two or more return air devices to improve the return air efficiency, and the return air devices are separated by partitions to prevent the return air devices from affecting each other and forming turbulence.

[0008] Furthermore, in the above-mentioned annealing furnace, the air outlet is annular, and a guide vane is arranged around the air outlet. The air outlet is annular, which allows hot air to pass more smoothly and reduce heat loss. The guide vane is arranged around the air outlet so that the hot air enters the airway evenly around the air outlet to increase the flow rate.

[0009] Furthermore, in the above-mentioned annealing furnace, the feeding device includes a pad, a guide rail, a support plate, and a driving rack. The pad is in the shape of a long strip, and the pad is arranged on the upper side of the bottom surface of the furnace body, and the pad is arranged vertically along the furnace door of the furnace body. The guide rail is arranged on the upper side of the pad, and the guide rail and the pad are arranged in the same straight line. The support plate and the guide rail are slidably connected through a sliding wheel. The support plate is arranged at one end of the furnace door of the furnace body and is provided with a support wheel, and the support wheel is supported and connected to the support plate through a support rod. A connecting rod is arranged between the support rods, and a driving rack is vertically arranged on the connecting rod. A load-bearing wheel is arranged on the lower side of the driving rack, and the load-bearing wheel is meshed with the driving rack, and the load-bearing wheel is connected to the furnace body shaft through the shaft sleeves at both ends. A driving gear is arranged on the bottom surface of the furnace body, and the driving gear is meshed with the driving rack. A driving shaft is passed through the driving gear, and the driving shaft is connected to the bottom shaft of the furnace body, and one end of the driving shaft is connected to the motor. During operation, the furnace door provided on the furnace body is opened, the motor drives the driving shaft to rotate, the driving gear rotates and then drives the driving rack, thereby pushing the pallet out of the furnace body, placing the workpiece on the pallet, and the motor drives the driving shaft to rotate in the opposite direction, thereby pushing the pallet into the furnace body, closing the furnace door, and performing annealing and aging treatment.

[0010] Furthermore, in the above-mentioned annealing furnace, the heating unit is a U-shaped heating tube. The heating unit is arranged in an array along the inner wall of the furnace body. The U-shaped heating tube is arranged in an array along the inner wall of the furnace body to form a surrounding heating structure, which greatly improves the space utilization inside the furnace body and makes the heat more evenly distributed in the entire furnace. In addition, the surrounding arrangement of the heating tube can more effectively reduce the temperature gradient in the furnace, ensuring that the workpiece is subjected to uniform heat radiation and convection conduction from all directions, thereby obtaining a good heat treatment effect.

[0011] Furthermore, in the above-mentioned annealing furnace, a ceramic insulating tube is provided at one end of the connection between the heating unit and the junction box. The ceramic insulating tube has insulating properties, which can effectively prevent the current from being directly transmitted to the furnace body or the external structure through the metal heating element, thereby avoiding short circuit and leakage accidents. In addition, the ceramic insulating tube has high temperature resistance, and the ceramic insulating tube can isolate the insulation material on the inner wall of the furnace body from the heating unit, thereby preventing the insulation material on the inner wall of the furnace body from contacting the heating unit, causing the insulation material to burn or even cause a fire. When the insulation material falls onto the heating unit, it may cause damage to the heating unit, and the ceramic insulating tube can also prevent this from happening.

[0012] Furthermore, in the above-mentioned annealing furnace, the inner wall of the heating chamber is a corrugated plate. This structure can increase the heating area, so that the heat is more evenly distributed throughout the heating chamber, which is beneficial to improving the temperature uniformity in the furnace. Compared with flat plates, corrugated plates can reduce the structural weight while ensuring sufficient strength, and can provide a larger heat transfer area in a smaller space, thereby achieving energy saving and consumption reduction.

[0013] Furthermore, in the above-mentioned annealing and aging furnace, an air curtain machine is provided at the furnace door of the furnace body. The air curtain machine can form an air curtain at the furnace door to block the direct convection of air inside and outside the furnace body, reduce heat loss, and maintain the temperature stability in the furnace. The continuous airflow formed by the air curtain machine can prevent dust, smoke, flying insects, etc. from entering the furnace, keep the air in the furnace clean, and ensure the annealing and aging effects.

[0014] Furthermore, in the above-mentioned annealing furnace, the furnace body is provided with a heat preservation layer, and heat preservation cotton is provided in the heat preservation layer. The heat preservation cotton has low thermal conductivity and good heat insulation performance, which can effectively reduce heat transfer and maintain a high temperature environment inside the furnace body, thereby saving energy and improving thermal efficiency.

[0015] It can be seen from the above technical scheme that the utility model has the following beneficial effects: the annealing and aging furnace of the utility model is used for annealing and aging treatment of large quantities of products, and the air duct formed between the inside of the furnace body and the heating chamber can ensure the uniform temperature inside the furnace body, ensure the heating effect, and obtain the expected annealing and aging treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the annealing and aging furnace of the utility model;

[0017] Figure 2 This is a perspective view of the annealing furnace of the utility model;

[0018] Figure 3 For this utility model Figure 2 Front view of

[0019] Figure 4It is a partial enlarged view of the air return device of the utility model;

[0020] Figure 5 It is a partial enlarged view of the feeding device of the utility model;

[0021] Figure 6 It is a partial enlarged view of the bottom of the feeding device of the utility model;

[0022] In the figure: 1, furnace body, 11, heating unit, 12, return air device, 121, air inlet, 122, air duct, 123, air outlet, 1231, guide plate, 124, motor, 13, air curtain machine, 14, insulation layer, 15, air duct, 2, heating chamber, 21, feeding device, 211, cushion block, 212, guide rail, 213, support plate, 214, driving rack, 215, sliding wheel, 216, supporting wheel, 217, supporting rod, 218, connecting rod, 219, driving shaft, 220, bearing wheel, 221, driving gear. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figure 1-3 An annealing furnace shown includes a furnace body 1. The furnace body 1 is provided with a furnace door, a heating chamber 2 is provided in the furnace body 1, the bottom surface of the heating chamber 2 is open, an air duct 15 is formed between the inner wall of the furnace body 1 and the outer wall of the heating chamber 2, and a heating unit 11 is provided on the inner wall of the furnace body 1. The heating unit 11 is arranged in the air duct 15 between the inner wall of the furnace body 1 and the outer wall of the heating chamber 2. The heating unit 11 is a U-shaped heating tube. The heating units 11 are arranged in an array along the inner wall of the furnace body 1. A ceramic insulating tube is sleeved on one end of the connection between the heating unit 11 and the junction box. A return air device 12 is provided between the top surface of the furnace body 1 and the top surface of the heating chamber 2. The return air device 12 is connected to the inner cavity of the heating chamber 2. The return air device 12 draws the air in the heating chamber 2 into the air duct 15 between the inner wall of the furnace body 1 and the outer wall of the heating chamber 2. There are two or more return air devices 12, and the return air devices 12 are separated by partitions. A feeding device 21 is provided on the bottom surface of the heating chamber 2. The inner wall of the heating chamber 2 is a corrugated plate. During the annealing and aging process, the furnace door provided on the furnace body 1 is opened, and the workpiece is fed into the heating chamber 2 through the feeding device 21. The furnace door is closed, and the annealing and aging furnace is started. The heating unit 11 provided on the inner wall of the furnace body 1 starts heating, and the return air device 12 draws the air in the heating chamber 2 into the air duct 15 between the inner wall of the furnace body 1 and the inner wall of the heating chamber 2. The air passes downward along the air duct 15 through the heating unit 11 provided on the inner wall of the furnace body 1 for heating, and then the air enters the heating chamber 2 from the lower end opening of the heating chamber 2 to heat the workpiece. A plurality of temperature sensing heads are provided inside the heating chamber, and the control system adjusts the switch of the heating unit in real time according to the temperature detected by the temperature sensing head, thereby accurately controlling the temperature inside the heating chamber 2. An air curtain machine 13 is provided at the furnace door of the furnace body 1. The furnace body 1 is provided with a thermal insulation layer 14, and thermal insulation cotton is provided in the thermal insulation layer 14.

[0025] like Figure 4 In the annealing furnace shown, the return air device 12 includes an air inlet 121, a wind tube 122, an air outlet 123, and a motor 124. The air inlet 121 is arranged at the top of the heating chamber 2, and the air inlet 121 is connected to the inner cavity of the heating chamber 2. The air outlet 123 is arranged in the air duct 15. A motor 124 is arranged at the top of the furnace body 1, and the motor 124 is arranged in the air outlet 123. The wind tube 122 connects the air outlet 123 and the air inlet 121, and a fan blade is installed on the shaft of the motor 124. The air outlet 123 is annular, and a guide plate 1231 is arranged around the air outlet 123.

[0026] like Figure 5-6 In the annealing furnace shown, the feeding device 21 includes a pad 211, a guide rail 212, a support plate 213, and a driving rack 214. The pad 211 is in the shape of a long strip, and is arranged on the upper side of the bottom surface of the furnace body 1. The pad 211 is arranged vertically along the door of the furnace body 1. The guide rail 212 is arranged on the upper side of the pad 211, and the guide rail 212 and the pad 211 are arranged in the same straight line. The support plate 213 and the guide rail 212 are slidably connected by a sliding wheel 215. The support plate 213 is arranged at one end of the door of the furnace body 1 and is provided with a supporting wheel 216, and the supporting wheel 216 is supported and connected to the support plate 213 through a supporting rod 217. A connecting rod 218 is provided between the support rods 217, and a driving rack 214 is vertically provided on the connecting rod 218. A bearing wheel 220 is provided on the lower side of the driving rack 214, and the bearing wheel 220 is meshed with the driving rack 214. The bearing wheel 220 is connected to the furnace body 1 through the shaft sleeves at both ends. A driving gear 221 is provided on the bottom surface of the furnace body 1, and the driving gear 221 is meshed with the driving rack 214. A driving shaft 219 is passed through the driving gear 221, and the driving shaft 219 is connected to the bottom shaft of the furnace body 1, and a motor is connected to one end of the driving shaft 219.

[0027] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with this field can understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model in turn. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An annealing furnace, characterized in that: The invention comprises a furnace body (1); the furnace body (1) is provided with a furnace door, a heating chamber (2) is provided in the furnace body (1), the bottom surface of the heating chamber (2) is open, and an air duct (15) is formed between the inner wall of the furnace body (1) and the outer wall of the heating chamber (2); a heating unit (11) is provided on the inner wall of the furnace body (1), and the heating unit (11) is arranged in the air duct (15) between the inner wall of the furnace body (1) and the outer wall of the heating chamber (2); a return air device (12) is provided between the top surface of the furnace body (1) and the top surface of the heating chamber (2), the return air device (12) is connected to the inner cavity of the heating chamber (2), and the return air device (12) draws air in the heating chamber (2) into the air duct (15); and a feeding device (21) is provided at the bottom of the heating chamber (2).

2. The annealing furnace according to claim 1, characterized in that: The air return device (12) comprises an air inlet (121), an air cylinder (122), an air outlet (123), and a motor (124); the air inlet (121) is arranged at the top of the heating chamber (2), and the air inlet (121) is connected to the inner cavity of the heating chamber (2); the air outlet (123) is arranged in the air duct (15), a motor (124) is arranged at the top of the furnace body (1), and the motor (124) is arranged in the air outlet (123); the air cylinder (122) connects the air outlet (123) and the air inlet (121), and the motor (124) is equipped with fan blades.

3. The annealing furnace according to claim 1, characterized in that: There are two or more return air devices (12), and the return air devices (12) are separated by partitions.

4. The annealing furnace according to claim 2, characterized in that: The air outlet (123) is annular, and a guide plate (1231) is provided around the air outlet (123).

5. The annealing furnace according to claim 1, characterized in that: The feeding device (21) comprises a pad (211), a guide rail (212), a support plate (213), and a driving rack (214); the pad (211) is in the shape of an elongated strip, and is disposed on the upper side of the bottom surface of the furnace body (1); the pad (211) is disposed perpendicular to the furnace door of the furnace body (1); the guide rail (212) is disposed on the upper side of the pad (211), and the guide rail (212) and the pad (211) are disposed in a straight line; the support plate (213) and the guide rail (212) are slidably connected via a sliding wheel (215); a support wheel (216) is disposed at one end of the furnace door of the furnace body (1), and the support wheel (216) is connected via a support rod (217) and the support plate (21 3) Support connection; a connecting rod (218) is provided between the supporting rods (217); a driving rack (214) is vertically provided on the connecting rod (218); a bearing wheel (220) is provided on the lower side of the driving rack (214), the bearing wheel (220) is meshed with the driving rack (214), and the bearing wheel (220) is connected to the shaft of the furnace body (1) through shaft sleeves at both ends; a driving gear (221) is provided on the bottom surface of the furnace body (1), and the driving gear (221) is meshed with the driving rack (214); a driving shaft (219) is passed through the driving gear (221), the driving shaft (219) is connected to a bearing shaft provided at the bottom of the furnace body (1), and one end of the driving shaft (219) is connected to a motor drive.

6. The annealing furnace according to claim 1, characterized in that: The heating units (11) are U-shaped heating tubes; the heating units (11) are arranged in an array along the inner wall of the furnace body (1).

7. The annealing furnace according to claim 1, characterized in that: A ceramic insulating tube is sleeved on one end where the heating unit (11) is connected to the junction box.

8. The annealing furnace according to claim 1, characterized in that: The inner wall of the heating chamber (2) is a corrugated hollow plate.

9. The annealing furnace according to claim 1, characterized in that: An air curtain machine (13) is provided at the door of the furnace body (1).

10. The annealing furnace according to claim 2, characterized in that: The furnace body (1) is provided with a heat-insulating layer (14), and heat-insulating cotton is provided in the heat-insulating layer (14).

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