A heat treatment preheating device for aluminum alloy parts

Abstract

This utility model relates to the field of aluminum alloy heat treatment technology and discloses a preheating device for heat treatment of aluminum alloy parts. The device includes a preheating box with an inlet pipe at one end and an outlet pipe at the other end. A hot air blower is connected to the inlet pipe. A door is installed on the top of the preheating box, and a heat exchanger is connected to the end of the outlet pipe. A circulation component is installed between the heat exchanger and the preheating box. The preheating box includes a heating chamber, a circulating water chamber outside the heating chamber, a hot water inlet at the bottom of the circulating water chamber, and a cold water outlet at the top. A turntable is installed at the bottom of the heating chamber, and a water inlet pipe is installed at the top of the circulating water chamber. This preheating device for heat treatment of aluminum alloy parts achieves secondary utilization of the heat generated during preheating by setting up a heat recovery circulation structure for high-temperature exhaust gas to the circulating water chamber. The water, heated after heat exchange, is then used for heat exchange in the preheating air box, avoiding heat energy waste and improving energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy heat treatment technology, and in particular to a heat treatment preheating device for aluminum alloy parts. Background Technology

[0002] Aluminum alloy parts refer to components made from aluminum alloys through processes such as casting, forging, and extrusion. Aluminum alloys are metallic materials based on aluminum with added alloying elements such as copper, magnesium, silicon, and zinc. They possess characteristics such as low density, high specific strength, good corrosion resistance, excellent electrical and thermal conductivity, and good machinability. These properties make aluminum alloy parts widely used in many fields such as aerospace, automotive, electronics, and machinery manufacturing, including aircraft fuselage components, automobile wheels, and electronic device housings.

[0003] The prior art patent with publication number CN222119324U discloses a heat treatment device for aluminum alloy castings. It is equipped with a base, a heating box is set on the top left side of the base, and sliding grooves are opened on both sides of the inner wall of the heating box. An electric push rod is set on the right side of the heating box, and a placement plate is set on the left side of the output end of the electric push rod. The hot air inside the heating device is extracted through a pump connected to an exhaust pipe. This hot air is then delivered to the heating chamber via multiple nozzles. The heating plate and heating wires heat the gas at the bottom and sides of the heating chamber, ensuring comprehensive heating and improving the heating effect on aluminum alloy castings. A vacuum pump connected to a connecting pipe and a first delivery pipe extracts hot air from the heating chamber. This extracted hot air is then sent to a storage tank via a second delivery pipe to store the heat, preventing heat loss. The stored air then preheats the aluminum alloy castings, improving the heat treatment effect. However, when the heating plate and heating wires are in operation, the exhaust gas temperature may rise rapidly (e.g., from 200°C to 300°C). When the heating equipment is paused or during temperature maintenance, the exhaust gas temperature drops rapidly, causing the preheating temperature in the storage tank to fluctuate with the exhaust gas temperature.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when preheating aluminum alloy parts, the preheating equipment often directly heats the product, resulting in slow heating, low efficiency, poor heating uniformity, high equipment energy consumption, and direct emission of high-temperature exhaust gas after heating, which leads to a large loss of heat energy and serious heat waste, making it difficult to meet the needs of green manufacturing and efficient production. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of large heat waste, uneven heating, slow temperature rise and high energy consumption during the preheating process, which makes it difficult to meet the needs of high-efficiency production. To this end, we propose a heat treatment preheating equipment for aluminum alloy parts.

[0006] To achieve the above objectives, this application adopts the following technical solution: a heat treatment preheating device for aluminum alloy parts, comprising a preheating box, an air inlet pipe installed at one end of the preheating box, an air outlet pipe installed at the other end of the preheating box, a hot air fan connected to the air inlet pipe, a box door installed at the top of the preheating box, a heat exchanger connected to the tail end of the air outlet pipe, a circulation component installed between the heat exchanger and the preheating box, the preheating box comprising a heating chamber, a circulating water chamber provided outside the heating chamber, a hot water inlet provided at the bottom of the circulating water chamber, a cold water outlet provided at the top of the circulating water chamber, a turntable installed at the bottom of the heating chamber, and a water inlet pipe provided at the top of the circulating water chamber.

[0007] Preferably, the outer layer of the circulating water cavity is provided with a polyurethane foam insulation layer.

[0008] Preferably, the heat exchanger includes a tube body, with an exhaust gas inlet pipe and an exhaust gas outlet pipe respectively provided at both ends of the tube body. The exhaust gas inlet pipe is connected to the exhaust gas outlet pipe. A cold water inlet is provided at the top of the tube body, and a hot water outlet is provided at the bottom of the tube body.

[0009] Preferably, the circulation component includes a hot water pipe and a cold water pipe. One end of the hot water pipe is connected to a hot water outlet, and the other end of the hot water pipe is connected to a hot water inlet. One end of the cold water pipe is connected to a cold water inlet, and the other end of the cold water pipe is connected to a cold water outlet. A water pump is installed in the middle of the cold water pipe.

[0010] Preferably, the turntable includes a disc body, a rotating shaft is mounted at the bottom of the disc body, and a motor is mounted at the bottom of the rotating shaft.

[0011] Preferably, the disk body has through holes.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] In this invention, a heat recovery circulation structure is set up to transfer high-temperature exhaust gas to a circulating water tank, thereby achieving secondary utilization of the heat generated in the high-temperature exhaust gas during the preheating process. By transferring the heat of the exhaust gas to cold water, and then using the heated water for heat exchange in the preheating air box, heat energy waste is avoided, energy utilization efficiency is significantly improved, and energy consumption costs of equipment operation are reduced.

[0014] In this invention, by setting a circulating water tank on the outer layer of the preheating air box and preheating with hot air inside, the temperature uniformity of the aluminum alloy parts during the heating process is improved. The circulating water tank utilizes the high specific heat capacity of water to absorb heat, causing the water temperature to rise slowly, which can effectively buffer and regulate the temperature inside the air box. The internal rotating structure allows the hot air to flow evenly across the surface of the aluminum alloy parts, reducing local temperature differences and ensuring the preheating quality of the aluminum alloy parts. It avoids problems such as deformation and uneven performance caused by local overheating or undercooling. Through stable water circulation and hot air uniformity control, the preheating temperature deviation of different batches of workpieces can be controlled within ±10℃, significantly improving product quality consistency. By using water as the heat exchange medium, the exhaust gas is completely isolated from the workpiece, preventing contaminants from contacting the workpiece surface. At the same time, the water circulation system can be replaced regularly to prevent the accumulation of impurities and ensure the purity of the preheating process. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the overall planar structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the preheating box of this utility model.

[0020] Legend: 1. Preheating box; 11. Heating chamber; 12. Circulating water chamber; 13. Hot water inlet; 14. Cold water outlet; 15. Water inlet pipe; 2. Air inlet pipe; 3. Hot air blower; 4. Air outlet pipe; 5. Box door; 6. Heat exchanger; 61. Pipe body; 62. Exhaust gas inlet pipe; 63. Exhaust gas outlet pipe; 64. Cold water inlet; 65. Hot water outlet; 7. Circulation components; 71. Hot water pipe; 72. Cold water pipe; 73. Water pump; 8. Turntable; 81. Disc body; 82. Rotating shaft; 83. Motor; 84. Through hole. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] Reference Figures 1-2 As shown, this utility model provides a technical solution: a heat treatment preheating device for aluminum alloy parts, comprising: a preheating box 1, an air inlet pipe 2 installed at one end of the preheating box 1 by screws, an air outlet pipe 4 installed at the other end of the preheating box 1 by screws, a hot air fan 3 connected to the air inlet pipe 2 for providing a heat source to the preheating box 1, a box door 5 installed on the top of the preheating box 1 by hinges, a heat exchanger 6 connected to the end of the air outlet pipe 4 by a flange, and a circulation component 7 installed between the heat exchanger 6 and the preheating box 1 by screws.

[0023] Reference Figure 3 As shown in this embodiment: the preheating box 1 includes a heating chamber 11, a circulating water chamber 12 is provided on the outside of the heating chamber 11, a polyurethane foam insulation layer is provided on the outer layer of the circulating water chamber 12, a hot water inlet 13 is provided at the bottom of the circulating water chamber 12, a cold water outlet 14 is provided at the top of the circulating water chamber 12, a turntable 8 is rotatably installed at the bottom inside the heating chamber 11, and a water inlet pipe 15 is provided at the top of the circulating water chamber 12. The water inlet pipe 15 is connected to an external water source to introduce the external water source into the circulating water chamber 12 for use.

[0024] Reference Figure 3 As shown in this embodiment: the heat exchanger 6 includes a tube body 61, with a tail gas inlet pipe 62 and a tail gas outlet pipe 63 respectively provided at both ends of the tube body 61. The tail gas inlet pipe 62 is connected to the outlet pipe 4 through a flange, which can introduce the preheated high-temperature tail gas into the heat exchanger 6 for secondary utilization of the remaining heat. A cold water inlet 64 is provided at the top of the tube body 61, and a hot water outlet 65 is provided at the bottom of the tube body 61.

[0025] Reference Figure 3 As shown in this embodiment: the circulation component 7 includes a hot water pipe 71 and a cold water pipe 72. One end of the hot water pipe 71 is connected to the hot water outlet 65 through a flange, and the other end of the hot water pipe 71 is connected to the hot water inlet 13 through a flange. One end of the cold water pipe 72 is connected to the cold water inlet 64 through a flange, and the other end of the cold water pipe 72 is connected to the cold water outlet 14 through a flange. A water pump 73 is installed in the middle of the cold water pipe 72.

[0026] Reference Figures 2-4As shown in this embodiment: the turntable 8 includes a disc body 81, and a rotating shaft 82 is fixedly installed on the bottom of the disc body 81 by welding. A motor 83 is fixedly installed on the bottom of the rotating shaft 82. The motor 83 drives the rotating shaft 82 to rotate, thereby driving the disc body 81 to rotate, so that the aluminum alloy parts placed on the disc body 81 rotate. When heating the aluminum alloy parts, the rotation of the aluminum alloy parts causes different parts of their surface to receive hot air alternately, so that the aluminum alloy parts are heated evenly. The disc body 81 has multiple through holes 84, which can enhance the air circulation at the bottom of the aluminum alloy parts. When the aluminum alloy parts are placed on the disc body 81, the bottom of the aluminum alloy parts can also be heated evenly.

[0027] Working principle: In use, open the chamber door 5, place the aluminum alloy part to be preheated on the plate 81, close the chamber door 5, and start the motor 83 to make the aluminum alloy part rotate slowly and uniformly with the plate 81. At this time, turn on the hot air blower 3 so that hot air enters the heating chamber 11 through the air inlet pipe 2. The hot air continuously passes through the aluminum alloy part and heats it. The high-temperature exhaust gas after heating enters the heat exchanger 6 through the air outlet pipe 4. Connect the external water source to the water inlet pipe 15 and turn on the water pump 73 so that the cold water in the circulating water chamber 12 passes through the cold water... Pipe 72 enters the heat exchanger 6 through the cold water inlet 64. The high-temperature exhaust gas then transfers heat to the cold water. After heat exchange, the cold water is heated and flows through the bottom hot water outlet 65 and the hot water pipe 71 into the circulating water chamber 12. The hot water in the circulating water chamber 12 heats the inner wall of the heating chamber 11 by heat conduction, raising the internal temperature of the heating chamber 11 and assisting the hot air in heating the aluminum alloy parts. This reduces the energy consumption of hot air heating and improves preheating efficiency. After the high-temperature exhaust gas cools down, it is discharged through the exhaust gas outlet pipe 63.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A heat treatment preheating device for aluminum alloy parts, characterized in that, The device includes a preheating chamber, with an air inlet pipe installed at one end and an air outlet pipe installed at the other end. A hot air blower is connected to the air inlet pipe. A door is installed on the top of the preheating chamber. A heat exchanger is connected to the tail end of the air outlet pipe. A circulation component is installed between the heat exchanger and the preheating chamber. The preheating chamber includes a heating chamber. A circulating water chamber is provided on the outside of the heating chamber. A hot water inlet is provided at the bottom of the circulating water chamber. A cold water outlet is provided at the top of the circulating water chamber. A turntable is installed at the bottom of the heating chamber. A water inlet pipe is provided at the top of the circulating water chamber.

2. The heat treatment preheating equipment for aluminum alloy parts according to claim 1, characterized in that: The outer layer of the circulating water chamber is provided with a polyurethane foam insulation layer.

3. The heat treatment preheating equipment for aluminum alloy parts according to claim 1, characterized in that: The heat exchanger includes a tube body, with an exhaust gas inlet pipe and an exhaust gas outlet pipe respectively provided at both ends of the tube body. The exhaust gas inlet pipe is connected to the exhaust gas outlet pipe. A cold water inlet is provided at the top of the tube body, and a hot water outlet is provided at the bottom of the tube body.

4. The heat treatment preheating equipment for aluminum alloy parts according to claim 1, characterized in that: The circulation component includes a hot water pipe and a cold water pipe. One end of the hot water pipe is connected to the hot water outlet, and the other end of the hot water pipe is connected to the hot water inlet. One end of the cold water pipe is connected to the cold water inlet, and the other end of the cold water pipe is connected to the cold water outlet. A water pump is installed in the middle of the cold water pipe.

5. The heat treatment preheating equipment for aluminum alloy parts according to claim 1, characterized in that: The turntable includes a disc body, a rotating shaft is mounted on the bottom of the disc body, and a motor is mounted on the bottom of the rotating shaft.

6. The heat treatment preheating equipment for aluminum alloy parts according to claim 5, characterized in that: The disk body has through holes.

Images