Aluminum alloy necked band forging flange heat treatment apparatus and method

Abstract

The application relates to the technical field of heat treatment, and discloses an aluminum alloy neck forging flange heat treatment equipment and method, which comprises a furnace body water tank, a waste heat recovery assembly, a heat treatment heating cavity, a gas filtering assembly, a heat treatment furnace cavity and a sealing door; the furnace body water tank is used for cooling and water supply of the bottom of the equipment. The aluminum alloy neck forging flange heat treatment equipment is characterized in that part of flue gas enters the air inlet pipeline through the flue gas discharge pipeline, is conveyed into the furnace body water tank through the air inlet pipeline, the recovered heat is transferred to the cooling medium in the furnace body water tank, the cooling water is preheated, the efficiency of the subsequent cooling process is improved, the flue gas emission temperature is reduced, and energy waste is reduced. The waste heat recovery assembly recovers the waste heat in the flue gas to the furnace body water tank through a return flow path heat exchange structure, preheats the cooling water, greatly reduces fuel consumption, improves energy utilization, reduces enterprise operation cost, reduces the flue gas emission temperature, and reduces thermal pollution.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, specifically to a heat treatment equipment and method for aluminum alloy necked forged flanges. Background Technology

[0002] Aluminum alloy necked forged flanges are critical connecting components in piping systems, widely used in aerospace, power fittings, and chemical fluid transportation. Their mechanical properties, dimensional stability, and corrosion resistance directly determine the safety and reliability of the entire pipeline system. Although forging can eliminate casting defects, refine grains, and form continuous metal flow lines through plastic deformation, significantly improving the basic performance of the flange, it also generates significant residual internal stress. Furthermore, the aluminum alloy itself has insufficient microstructure uniformity. Without subsequent heat treatment, the flange is prone to deformation and cracking, insufficient strength, and poor corrosion resistance, failing to meet the requirements of high-standard operating conditions.

[0003] Currently, the high-temperature flue gas generated by gas-fired heat treatment furnaces is directly emitted, and a large amount of waste heat carried by the flue gas is not recovered and utilized. This results in low fuel utilization, high operating costs, and failure to meet energy-saving production requirements. Furthermore, the exhaust gas generated during heat treatment contains dust and combustion impurities, which, if directly emitted, will cause environmental pollution. Simultaneously, these impurities easily deposit in the furnace cavity and exhaust pipes, clogging flow channels, corroding equipment, and affecting furnace temperature uniformity and equipment lifespan. Additionally, aluminum alloys require rapid and uniform cooling after solution treatment. Traditional equipment uses a single cooling method, making it impossible to precisely control the cooling rate. This easily leads to uneven cooling of flange workpieces, generating new residual stress and affecting the consistency of heat treatment quality. Summary of the Invention

[0004] The purpose of this invention is to provide a heat treatment equipment and method for aluminum alloy neck forged flanges, in order to solve the problems mentioned in the background art, where the waste gas generated during the heat treatment process contains dust and combustion impurities, and direct discharge will cause environmental pollution; at the same time, impurities are easy to deposit in the furnace cavity and exhaust pipes, clogging the flow channel, corroding the equipment, and affecting the uniformity of furnace temperature and the service life of the equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat treatment equipment for aluminum alloy necked forged flanges, comprising: a furnace water tank, a waste heat recovery assembly, a heat treatment heating chamber, a gas filtration assembly, a heat treatment furnace chamber, and a sealing door;

[0006] The furnace water tank serves as the cooling and water supply base at the bottom of the equipment. The heat treatment furnace cavity is fixedly installed above the furnace water tank. The heat treatment heating chamber is horizontally installed on one side of the heat treatment furnace cavity to provide a heat source for heat treatment. The waste heat recovery assembly is installed at the end of the heat treatment heating chamber and is connected to the furnace water tank to recover waste heat from the flue gas. The gas filtration assembly is installed at the top of the heat treatment furnace cavity to filter the waste gas generated during the heat treatment process. The operator opens the furnace door, places the aluminum alloy necked forged flange workpiece into the heat treatment furnace cavity, and closes the furnace door to form a sealed furnace cavity. The heat treatment heating chamber is a gas-fired heating chamber, with its combustion end extending into the heat treatment furnace cavity. High-temperature heat is generated by burning gas to provide a heat source for heat treatment in the furnace cavity. The high-temperature flue gas generated by combustion enters the furnace cavity and heats the flange workpiece inside, achieving the heating and holding processes required for solution treatment or annealing.

[0007] The waste heat recovery assembly includes a docking seat, a heat exchange shell, an air inlet pipe, a flue pipe, and a sealing partition. The docking seat is fixedly connected to the end of the heat treatment heating chamber.

[0008] Furthermore, the heat exchange shell is connected to the heat treatment heating chamber via a docking seat, and the air inlet pipe and exhaust pipe are respectively located on the side wall and end of the heat exchange shell. The waste heat recovery assembly at the end of the heat treatment heating chamber operates synchronously, and the high-temperature flue gas generated by combustion enters the interior of the heat exchange shell through the docking seat.

[0009] Furthermore, the sealing partition is disposed inside the heat exchange shell and includes heat exchange fins, flow guide baffles, and exhaust ports. The heat exchange fins and flow guide baffles cooperate to form a zigzag flow path for the flue gas within the heat exchange shell, achieving heat exchange. The cooperation between the heat exchange fins and flow guide baffles within the sealing partition to form a zigzag flow path for the flue gas within the heat exchange shell extends the flue gas residence time, achieving sufficient heat exchange between the flue gas and the heat exchange medium. Simultaneously, some flue gas enters the inlet pipe through the exhaust pipe and is transported to the furnace water tank through the inlet pipe, allowing the recovered heat to be transferred to the cooling medium in the furnace water tank, preheating the cooling water, improving the efficiency of subsequent cooling processes, and reducing the flue gas emission temperature, thus reducing energy waste. The waste heat recovery component, through the zigzag flow path heat exchange structure, recovers the waste heat from the flue gas to the furnace water tank, achieving preheating of the cooling water, significantly reducing fuel consumption, improving energy utilization, reducing enterprise operating costs, and simultaneously reducing the flue gas emission temperature, thus reducing thermal pollution.

[0010] Furthermore, the air filtration assembly includes a cleaning component, an air filter housing, an upper chamber for the air filtration cavity, a flow equalization component, and a motor. The air filter housing has a cylindrical structure, with its bottom connected to the heat treatment furnace cavity. The air filtration assembly at the top of the heat treatment furnace cavity filters and purifies the exhaust gas discharged from the furnace cavity. The exhaust gas in the furnace cavity enters the bottom of the air filter housing and is first evenly distributed by the flow equalization component. The annular air distribution groove on the base of the flow equalization plate cooperates with the corrugated flow equalization plate to ensure that the exhaust gas is evenly diffused along the corrugated flow path, avoiding uneven filtration caused by airflow deviation.

[0011] Furthermore, the upper chamber of the air filtration chamber is located on the upper part of the air filtration cylinder shell, the flow equalization component is installed between the air filtration cylinder shell and the upper chamber of the air filtration chamber to ensure that the exhaust gas entering the air filtration assembly is evenly distributed, and the cleaning device is installed in the upper chamber of the air filtration chamber and is driven by a motor to automatically clean the filter structure inside the air filtration assembly.

[0012] Furthermore, the cleaning assembly includes a fixed base, a filter screen mounting bracket, a filter cylinder, blades, a deflector, and a drive shaft. The fixed base is installed at the top of the upper chamber of the filtration chamber, the filter screen mounting bracket is fixedly installed below the fixed base, and the filter cylinder is installed on the filter screen mounting bracket. Evenly distributed exhaust gas enters the upper chamber of the filtration chamber and is filtered by the filter cylinder on the filter screen mounting bracket, removing dust and combustion impurities from the exhaust gas, thus achieving exhaust gas purification. The motor drives the drive shaft to rotate, causing the blades and deflectors to rotate synchronously, scraping and cleaning the inner and outer surfaces of the filter cylinder to prevent impurities from clogging the filter media, achieving automatic maintenance of the filter assembly without frequent shutdowns for cleaning. The filtered and purified exhaust gas is finally discharged from the exhaust port at the top, meeting environmental emission standards, while preventing impurities from accumulating in the furnace chamber and pipes, ensuring long-term stable operation of the equipment.

[0013] Furthermore, the drive shaft is driven by a motor, and the blades and paddles are fixed on the drive shaft. As the drive shaft rotates, they scrape and clean the inner and outer surfaces of the filter cartridge.

[0014] Furthermore, the flow equalization assembly includes a flow equalization disk base, an annular air distribution groove, and a corrugated flow equalization plate. The flow equalization disk base is fixedly installed at the bottom of the filter cartridge housing. The annular air distribution groove is opened on the flow equalization disk base. The corrugated flow equalization plate is embedded in the annular air distribution groove, so that the exhaust gas is evenly diffused along the flow path of the corrugated flow equalization plate, avoiding airflow deviation.

[0015] Furthermore, a cooling channel is provided between the furnace water tank and the heat treatment furnace cavity. The cooling medium in the furnace water tank can enter the cooling channel through a control valve pipe to cool the outer wall of the heat treatment furnace cavity, thereby achieving temperature control of the furnace body. The heat treatment heating chamber is a gas-fired heating chamber, with its combustion end extending into the heat treatment furnace cavity. The flue gas generated by combustion passes through the heat treatment furnace cavity and is filtered by the gas filter assembly before being discharged. The waste heat of the flue gas is recovered to the furnace water tank through a waste heat recovery assembly. The furnace water tank serves as the cooling and water supply base at the bottom of the equipment. The cooling medium inside the furnace water tank enters the cooling channel between the furnace water tank and the heat treatment furnace cavity through a control valve pipe, circulating and cooling the outer wall of the heat treatment furnace cavity. The temperature of the outer wall of the furnace cavity can be precisely controlled according to process requirements to avoid overheating of the furnace body. At the same time, it provides a stable cooling water source for the quenching and cooling of the workpiece, achieving dual control of furnace body cooling and workpiece cooling, and ensuring temperature stability during the heat treatment process. After the workpiece completes the heat treatment process, the furnace cavity is rapidly cooled by the cooling medium in the furnace water tank. Once the furnace cavity temperature drops to a safe range, the furnace door is opened, and the processed aluminum alloy neck forged flange workpiece is taken out and put into the next batch of production process.

[0016] Furthermore, a heat treatment method for an aluminum alloy necked forged flange comprises the following steps:

[0017] S1. Workpiece Placement: The operator opens the furnace door on one side of the heat treatment furnace chamber and neatly places the forged aluminum alloy necked forged flanges on the tooling rack inside the heat treatment furnace chamber, ensuring that the flange workpieces are placed at uniform intervals to avoid uneven heating caused by stacking of workpieces. After the workpieces are placed, the furnace door is closed and locked to form a closed heat treatment space in the heat treatment furnace chamber. The sealing of each pipeline and control valve connection is checked to ensure that there is no risk of air or water leakage.

[0018] S2. Heating and heat treatment: The staff starts the heat treatment heating chamber and uses gas combustion to supply heat. The combustion end delivers high-temperature heat source into the heat treatment furnace chamber to perform segmented gradient heating of the aluminum alloy necked forged flange in the furnace chamber.

[0019] S3. Flue gas treatment: The high-temperature flue gas generated by combustion in the heat treatment heating chamber flows into the waste heat recovery component after flowing inside the furnace chamber. The flue gas enters the heat exchange shell through the docking seat. Under the obstruction and guidance of the flow guide baffle and heat exchange fins in the sealed partition, a zigzag flow path is formed, which prolongs the heat exchange time of the flue gas. Throughout the heat treatment operation, the motor continuously drives the drive shaft to rotate stably, which drives the blades and the swivel to rotate synchronously. The rotating blades agitate the airflow inside the upper chamber of the filter chamber to assist the flow of waste gas. The swivel is attached to the inner and outer surfaces of the filter cartridge and circulates and scrapes.

[0020] S4. After the heat treatment and heat preservation process is completed, the staff will turn off the gas supply to the heat treatment heating chamber and open the control valve to allow the cooling medium inside the furnace water tank to circulate into the cooling channel on the outer wall of the heat treatment furnace. The circulating cooling medium will uniformly cool the outer wall of the furnace, achieving a slow and controllable decrease in the furnace temperature.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (i) In this heat treatment equipment and method for aluminum alloy neck forged flanges, a portion of the flue gas enters the inlet pipe through the exhaust pipe and is then transported to the furnace water tank. This allows the recovered heat to be transferred to the cooling medium in the furnace water tank, preheating the cooling water, improving the efficiency of subsequent cooling processes, and simultaneously reducing the flue gas emission temperature, thus reducing energy waste. The waste heat recovery component, through a reversible flow path heat exchange structure, recovers the waste heat from the flue gas to the furnace water tank, achieving preheating of the cooling water, significantly reducing fuel consumption, improving energy utilization, reducing enterprise operating costs, and simultaneously reducing the flue gas emission temperature, thus reducing thermal pollution.

[0023] (ii) The heat treatment equipment and method for aluminum alloy neck forged flanges can accurately control the temperature of the outer wall of the furnace cavity according to the process requirements, avoid overheating of the furnace body, and provide a stable cooling water source for the quenching and cooling of the workpiece, thereby achieving dual control of furnace body cooling and workpiece cooling and ensuring the temperature stability of the heat treatment process.

[0024] (III) The heat treatment equipment and method for aluminum alloy neck forged flanges, in which the furnace water tank and control valve pipe are matched, can accurately control the temperature of the outer wall of the furnace cavity according to the process requirements, avoid overheating of the furnace body, and at the same time provide a stable cooling water source for the quenching and cooling of the workpiece, so as to realize the dual control of furnace body cooling and workpiece cooling, and ensure the temperature stability of the heat treatment process.

[0025] (iv) In the heat treatment equipment for aluminum alloy neck forged flanges, the air filter assembly at the top of the heat treatment furnace cavity filters and purifies the exhaust gas discharged from the furnace cavity. The exhaust gas in the furnace cavity enters the bottom of the air filter shell and first passes through the flow equalization assembly to distribute the airflow evenly. The annular air distribution groove on the base of the flow equalization plate cooperates with the wave-shaped flow equalization plate to make the exhaust gas diffuse evenly along the wave-shaped flow path, avoiding the problem of uneven filtration caused by airflow deviation.

[0026] (V) In this aluminum alloy neck forged flange heat treatment equipment, the evenly distributed exhaust gas enters the upper chamber of the filtration chamber and is filtered by the filter cartridges on the filter screen mounting frame to remove dust and combustion impurities from the exhaust gas, thus achieving exhaust gas purification. The motor drives the drive shaft to rotate, causing the blades and deflectors to rotate synchronously, scraping and cleaning the inner and outer surfaces of the filter cartridges to prevent impurities from clogging the filter media, achieving automatic maintenance of the filter components without the need for frequent shutdowns for cleaning. The filtered and purified exhaust gas is finally discharged from the exhaust port at the top, meeting environmental emission standards, while preventing impurities from accumulating in the furnace chamber and pipelines, ensuring long-term stable operation of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle;

[0029] Figure 3 This is a schematic diagram of the air filtration assembly structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of the air filtration assembly of the present invention;

[0031] Figure 5 This is a schematic diagram of the enlarged structure of invention A;

[0032] Figure 6 This is a schematic diagram of the cleaning component structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the cross-sectional structure of the cleaning component of the present invention;

[0034] Figure 8 This is a schematic diagram of the waste heat recovery component structure of the present invention;

[0035] Figure 9 This is a schematic diagram of the disassembled structure of the waste heat recovery component of the present invention;

[0036] Figure 10 This is a schematic diagram of the sealing partition structure of the present invention;

[0037] Figure 11 This is a schematic flowchart of a heat treatment method for an aluminum alloy necked forged flange according to the present invention.

[0038] In the diagram: 1. Furnace body water tank; 2. Waste heat recovery assembly; 21. Docking seat; 22. Heat exchange shell; 23. Air inlet pipe; 24. Exhaust pipe; 25. Sealing partition; 251. Heat exchange fins; 252. Flow guide baffle; 253. Exhaust gas outlet; 3. Heat treatment heating chamber; 4. Air filter assembly; 41. Cleaning component; 411. Fixing base; 412. Filter screen mounting bracket; 413. Filter cylinder; 414. Blade; 415. Baffle; 416. Drive shaft; 42. Air filter shell; 43. Upper chamber of air filter chamber; 44. Flow equalization assembly; 441. Flow equalization plate base; 442. Annular air distribution groove; 443. Corrugated flow equalization plate; 45. Motor; 5. Heat treatment furnace chamber; 6. Sealing door; 7. Control valve pipe. Detailed Implementation

[0039] Example 1, as Figures 1 to 10 As shown, the present invention provides a technical solution: a heat treatment equipment for aluminum alloy neck forged flanges, comprising: a furnace water tank 1, a waste heat recovery assembly 2, a heat treatment heating chamber 3, a gas filtration assembly 4, a heat treatment furnace chamber 5, and a sealing door 6.

[0040] The furnace water tank 1 serves as a cooling and water supply base at the bottom of the equipment. The heat treatment furnace chamber 5 is fixedly installed above the furnace water tank 1. The heat treatment heating chamber 3 is horizontally installed on one side of the heat treatment furnace chamber 5 to provide a heat source for the furnace chamber. The waste heat recovery assembly 2 is installed at the end of the heat treatment heating chamber 3 and is connected to the furnace water tank 1 to recover waste heat from the flue gas. The gas filtration assembly 4 is installed at the top of the heat treatment furnace chamber 5 to filter the waste gas generated during the heat treatment process. The operator opens the furnace door, places the aluminum alloy necked forged flange workpiece into the heat treatment furnace chamber 5, and closes the furnace door to form a sealed furnace chamber. The heat treatment heating chamber 3 is a gas-fired heating chamber, with its combustion end extending into the heat treatment furnace chamber 5. High-temperature heat is generated by burning gas to provide a heat source for the furnace chamber. The high-temperature flue gas generated by combustion enters the furnace chamber and heats the flange workpiece inside, achieving the heating and holding processes required for solution treatment or annealing.

[0041] The waste heat recovery assembly 2 includes a docking seat 21, a heat exchange shell 22, an air inlet pipe 23, a flue gas exhaust pipe 24, and a sealing partition 25. The docking seat 21 is fixedly connected to the end of the heat treatment heating chamber 3. The heat exchange shell 22 is connected to the heat treatment heating chamber 3 through the docking seat 21. The air inlet pipe 23 and the flue gas exhaust pipe 24 are respectively opened on the side wall and end of the heat exchange shell 22. The waste heat recovery assembly 2 at the end of the heat treatment heating chamber 3 operates synchronously. The heat exchange shell 22 is connected to the heat treatment heating chamber 3 through the docking seat 21, and the high-temperature flue gas generated by combustion enters the interior of the heat exchange shell 22.

[0042] The sealing partition 25 is disposed inside the heat exchange shell 22 and includes heat exchange fins 251, flow guide baffles 252, and exhaust port 253. The heat exchange fins 251 and flow guide baffles 252 cooperate to form a zigzag flow path for the flue gas within the heat exchange shell 22, thereby achieving heat exchange. The cooperation between the heat exchange fins 251 and flow guide baffles 252 within the sealing partition 25 extends the residence time of the flue gas, ensuring sufficient heat exchange between the flue gas and the heat exchange medium. Simultaneously, some flue gas enters the intake pipe 23 through the exhaust pipe 24 and is then transported to the furnace water tank 1. This allows the recovered heat to be transferred to the cooling medium in the furnace water tank 1, preheating the cooling water, improving the efficiency of subsequent cooling processes, and reducing the flue gas emission temperature, thus minimizing energy waste. The waste heat recovery component 2 recovers the waste heat in the flue gas to the furnace water tank 1 through the folded flow path heat exchange structure, realizes the preheating of cooling water, significantly reduces fuel consumption, improves energy utilization, reduces enterprise operating costs, and at the same time reduces the flue gas emission temperature and reduces thermal pollution.

[0043] Example 2, based on Example 1, such as Figures 3 to 7 As shown, the air filtration assembly 4 includes a cleaning pry bar 41, an air filter housing 42, an upper chamber 43 for the air filtration cavity, a flow equalization assembly 44, and a motor 45. The air filter housing 42 has a cylindrical structure, and its bottom is connected to the heat treatment furnace cavity 5. The air filtration assembly 4 at the top of the heat treatment furnace cavity 5 filters and purifies the exhaust gas discharged from the furnace cavity. The exhaust gas in the furnace cavity enters the bottom of the air filter housing 42 and first passes through the flow equalization assembly 44 for airflow distribution. The annular air distribution groove 442 on the flow equalization plate base 441 cooperates with the corrugated flow equalization plate 443 to make the exhaust gas diffuse evenly along the corrugated flow path, avoiding the problem of uneven filtration caused by airflow deviation.

[0044] The upper chamber 43 of the air filter is located on the upper part of the air filter housing 42. The flow equalization component 44 is installed between the air filter housing 42 and the upper chamber 43 of the air filter to ensure that the exhaust gas entering the air filter is evenly distributed. The cleaning pusher 41 is installed in the upper chamber 43 of the air filter and is driven by the motor 45 to automatically clean the filter structure inside the air filter.

[0045] The cleaning component 41 includes a fixed base 411, a filter screen mounting bracket 412, a filter cylinder 413, blades 414, a swivel 415, and a drive shaft 416. The fixed base 411 is installed on the top of the upper chamber 43 of the filtration chamber. The filter screen mounting bracket 412 is fixedly installed below the fixed base 411, and the filter cylinder 413 is installed on the filter screen mounting bracket 412. Evenly distributed exhaust gas enters the upper chamber 43 of the filtration chamber and is filtered by the filter cylinder 413 on the filter screen mounting bracket 412, removing dust and combustion impurities from the exhaust gas, thus purifying it. The motor 45 drives the drive shaft 416 to rotate, causing the blades 414 and swivel 415 to rotate synchronously, scraping and cleaning the inner and outer surfaces of the filter cylinder 413 to prevent impurities from clogging the filter media. This achieves automatic maintenance of the filter assembly, eliminating the need for frequent shutdowns for cleaning. The filtered and purified exhaust gas is finally discharged from the exhaust port at the top, meeting environmental emission standards while preventing impurities from accumulating in the furnace chamber and pipes, ensuring long-term stable operation of the equipment.

[0046] The drive shaft 416 is driven by the motor 45. The blades 414 and the paddles 415 are fixed on the drive shaft 416 and rotate with the drive shaft 416 to scrape and clean the inner and outer surfaces of the filter cartridge 413.

[0047] The flow equalization assembly 44 includes a flow equalization plate base 441, an annular air distribution groove 442, and a corrugated flow equalization plate 443. The flow equalization plate base 441 is fixedly installed at the bottom of the filter cartridge housing 42. The annular air distribution groove 442 is formed on the flow equalization plate base 441. The corrugated flow equalization plate 443 is embedded in the annular air distribution groove 442, so that the exhaust gas is evenly diffused along the flow path of the corrugated flow equalization plate 443, avoiding airflow deviation.

[0048] Example 3, based on Examples 1 and 2, such as Figures 1 to 11 As shown, a cooling channel is provided between the furnace water tank 1 and the heat treatment furnace cavity 5. The cooling medium in the furnace water tank 1 can enter the cooling channel through the control valve pipe 7 to cool the outer wall of the heat treatment furnace cavity 5, thereby achieving temperature control of the furnace body. The furnace water tank 1 serves as the cooling and water supply base at the bottom of the equipment. The cooling medium inside enters the cooling channel between the furnace water tank 1 and the heat treatment furnace cavity 5 through the control valve pipe 7 to circulate and cool the outer wall of the heat treatment furnace cavity 5. The temperature of the outer wall of the furnace cavity can be precisely controlled according to process requirements to avoid overheating of the furnace body. At the same time, it provides a stable cooling water source for the quenching and cooling of the workpiece, achieving dual control of furnace body cooling and workpiece cooling, and ensuring the temperature stability of the heat treatment process.

[0049] The heat treatment heating chamber 3 is a gas-fired heating chamber, with its combustion end extending into the heat treatment furnace chamber 5. The flue gas generated by combustion is filtered sequentially through the heat treatment furnace chamber 5 and the gas filter assembly 4 before being discharged. The waste heat of the flue gas is recovered to the furnace water tank 1 through the waste heat recovery assembly 2. After the workpiece completes the heat treatment process, the furnace chamber is rapidly cooled by the cooling medium in the furnace water tank 1. Once the furnace temperature drops to a safe range, the furnace door is opened, and the processed aluminum alloy neck forged flange workpiece is taken out and enters the next batch of production process.

[0050] A heat treatment method for an aluminum alloy necked forged flange consists of the following steps:

[0051] S1. Workpiece Placement: The staff opens the furnace door on one side of the heat treatment furnace chamber 5 and neatly places the forged aluminum alloy neck forged flanges on the tooling rack inside the heat treatment furnace chamber 5, ensuring that the flange workpieces are placed at a uniform distance to avoid uneven heating caused by stacking of workpieces. After the workpieces are placed, the furnace door is closed and locked to make the heat treatment furnace chamber 5 a closed heat treatment space. The sealing of each pipeline and control valve pipe 7 is checked to ensure that there is no risk of air or water leakage.

[0052] S2. Heating and heat treatment: The staff starts the heat treatment heating chamber 3 and uses gas combustion to supply heat. The combustion end delivers high-temperature heat source into the heat treatment furnace chamber 5 to perform segmented gradient heating of the aluminum alloy necked forged flange in the furnace chamber.

[0053] S3. Flue gas treatment: The high-temperature flue gas generated by combustion in the heat treatment heating chamber 3 flows into the waste heat recovery component 2 after flowing inside the furnace chamber. The flue gas enters the heat exchange shell 22 through the docking seat 21. Under the blocking and guiding effect of the flow guide baffle 252 and heat exchange fins 251 in the sealing partition 25, a zigzag flow path is formed, which prolongs the heat exchange time of the flue gas. Throughout the heat treatment operation, the motor 45 continuously drives the drive shaft 416 to rotate stably, driving the blades 414 and the swivel 415 to rotate synchronously. The rotating blades 414 stir the airflow inside the upper chamber 43 of the filter chamber to assist the flow of waste gas. The swivel 415 is attached to the inner and outer surfaces of the filter cylinder 413 for cyclic scraping.

[0054] S4. After the cooling and shaping process and heat treatment insulation process are completed, the staff will turn off the gas supply to the heat treatment heating chamber 3 and open the control valve pipe 7 to allow the cooling medium inside the furnace water tank 1 to circulate into the cooling channel on the outer wall of the heat treatment furnace chamber 5. The circulating cooling medium will uniformly cool the outer wall of the furnace chamber, so as to achieve a slow and controllable decrease in the furnace temperature.

[0055] During operation, the operator opens the furnace door, places the aluminum alloy necked forged flange workpiece into the heat treatment furnace chamber 5, and closes the furnace door to form a sealed furnace chamber. The heat treatment heating chamber 3 is a gas-fired heating chamber, with its combustion end extending into the heat treatment furnace chamber 5. High-temperature heat is generated by burning gas, providing a heat source for the furnace chamber. The high-temperature flue gas generated by combustion enters the furnace chamber, heating the flange workpiece inside to achieve the heating and holding processes required for solution treatment or annealing.

[0056] The waste heat recovery component 2 at the end of the heat treatment heating chamber 3 works synchronously. The heat exchange shell 22 is connected to the heat treatment heating chamber 3 through the docking seat 21, and the high-temperature flue gas generated by combustion enters the interior of the heat exchange shell 22.

[0057] The heat exchange fins 251 within the sealed partition 25 cooperate with the flow guide baffle 252 to create a zigzag flow path for the flue gas within the heat exchange shell 22, extending the flue gas residence time and achieving sufficient heat exchange between the flue gas and the heat exchange medium. Simultaneously, some flue gas enters the inlet pipe 23 through the exhaust pipe 24 and is then transported to the furnace water tank 1. This allows the recovered heat to be transferred to the cooling medium in the furnace water tank 1, preheating the cooling water, improving the efficiency of subsequent cooling processes, and reducing the flue gas emission temperature, thus reducing energy waste. The waste heat recovery component 2, through its zigzag flow path heat exchange structure, recovers waste heat from the flue gas to the furnace water tank 1, preheating the cooling water, significantly reducing fuel consumption, improving energy utilization, reducing enterprise operating costs, and simultaneously lowering the flue gas emission temperature, thus reducing thermal pollution.

[0058] The furnace water tank 1 serves as the cooling and water supply base at the bottom of the equipment. The cooling medium inside enters the cooling channel between the furnace water tank 1 and the heat treatment furnace cavity 5 through the control valve pipe 7, circulating and cooling the outer wall of the heat treatment furnace cavity 5. The temperature of the outer wall of the furnace cavity can be precisely controlled according to process requirements to avoid overheating of the furnace body. At the same time, it provides a stable cooling water source for the quenching and cooling of the workpiece, realizing dual control of furnace body cooling and workpiece cooling, and ensuring the temperature stability of the heat treatment process.

[0059] The air filter assembly 4 at the top of the heat treatment furnace cavity 5 filters and purifies the exhaust gas discharged from the furnace cavity. The exhaust gas in the furnace cavity enters the bottom of the air filter housing 42 and first passes through the flow equalization assembly 44 for airflow distribution. The annular air distribution groove 442 on the flow equalization plate base 441 cooperates with the wave-shaped flow equalization plate 443 to make the exhaust gas diffuse evenly along the wave-shaped flow path, avoiding the problem of uneven filtration caused by airflow deviation.

[0060] Evenly distributed exhaust gas enters the upper chamber 43 of the filtration chamber and is filtered by the filter cartridge 413 on the filter mounting bracket 412, removing dust and combustion impurities from the exhaust gas and achieving purification. Motor 45 drives the drive shaft 416 to rotate, causing blades 414 and paddles 415 to rotate synchronously, scraping and cleaning the inner and outer surfaces of the filter cartridge 413 to prevent impurities from clogging the filter media. This achieves automatic maintenance of the filter assembly, eliminating the need for frequent shutdowns for cleaning. The filtered and purified exhaust gas is finally discharged from the exhaust port at the top, meeting environmental emission standards while preventing impurities from accumulating in the furnace chamber and pipes, ensuring long-term stable operation of the equipment.

[0061] After the workpiece completes the heat treatment process, the furnace cavity is rapidly cooled by the cooling medium in the furnace water tank 1. Once the furnace cavity temperature drops to a safe range, the furnace door is opened, and the processed aluminum alloy neck forged flange workpiece is taken out and put into the next batch of production process.

Claims

1. A heat treatment device for aluminum alloy necked forged flanges, characterized in that, include: Furnace body water tank (1), waste heat recovery assembly (2), heat treatment heating chamber (3), air filtration assembly (4), heat treatment furnace chamber (5) and sealing door (6); The furnace water tank (1) is used as a cooling and water supply base at the bottom of the equipment. The heat treatment furnace cavity (5) is fixedly installed above the furnace water tank (1). The heat treatment heating cavity (3) is installed horizontally on one side of the heat treatment furnace cavity (5) to provide heat source for the furnace cavity. The waste heat recovery component (2) is installed at the end of the heat treatment heating cavity (3) and is connected to the furnace water tank (1) to recover waste heat from the flue gas. The gas filtration component (4) is installed on the top of the heat treatment furnace cavity (5) to filter the waste gas generated during the heat treatment process. The waste heat recovery component (2) includes a docking seat (21), a heat exchange shell (22), an air inlet pipe (23), a smoke exhaust pipe (24), and a sealing partition (25). The docking seat (21) is fixedly connected to the end of the heat treatment heating chamber (3).

2. The heat treatment equipment for aluminum alloy necked forged flanges according to claim 1, characterized in that: The heat exchange shell (22) is connected to the heat treatment heating chamber (3) through the docking seat (21), and the air inlet pipe (23) and the smoke exhaust pipe (24) are respectively opened on the side wall and end of the heat exchange shell (22).

3. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 2, characterized in that: The sealing partition (25) is set inside the heat exchange shell (22) and includes heat exchange fins (251), flow guide baffles (252) and exhaust gas outlet (253). The heat exchange fins (251) and flow guide baffles (252) cooperate to form a folding flow path for the flue gas in the heat exchange shell (22) to achieve heat exchange.

4. The heat treatment equipment for aluminum alloy necked forged flanges according to claim 1, characterized in that: The air filtration assembly (4) includes a cleaning pusher (41), an air filtration cylinder shell (42), an upper chamber of the air filtration chamber (43), a flow equalization assembly (44), and a motor (45). The air filtration cylinder shell (42) is a cylindrical structure, and its bottom is connected to the heat treatment furnace cavity (5).

5. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 4, characterized in that: The upper chamber (43) of the air filter is located on the upper part of the air filter housing (42). The flow equalization component (44) is installed between the air filter housing (42) and the upper chamber (43) of the air filter to make the exhaust gas entering the air filter evenly distributed. The cleaning pusher (41) is installed in the upper chamber (43) of the air filter and is driven by a motor (45) to automatically clean the filter structure inside the air filter.

6. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 5, characterized in that: The cleaning component (41) includes a fixed base (411), a filter mounting bracket (412), a filter cylinder (413), blades (414), a paddle (415), and a drive shaft (416). The fixed base (411) is installed on the top of the upper chamber (43) of the air filtration chamber. The filter mounting bracket (412) is fixedly installed below the fixed base (411). The filter cylinder (413) is installed on the filter mounting bracket (412).

7. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 6, characterized in that: The drive shaft (416) is driven by a motor (45). The blades (414) and the paddles (415) are fixed on the drive shaft (416) and rotate with the drive shaft (416) to scrape and clean the inner and outer surfaces of the filter cartridge (413).

8. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 4, characterized in that: The flow equalization assembly (44) includes a flow equalization plate base (441), an annular air distribution groove (442), and a wave-shaped flow equalization plate (443). The flow equalization plate base (441) is fixedly installed at the bottom of the filter housing (42). The annular air distribution groove (442) is opened on the flow equalization plate base (441). The wave-shaped flow equalization plate (443) is embedded in the annular air distribution groove (442) so that the exhaust gas is evenly diffused along the flow path of the wave-shaped flow equalization plate (443) to avoid airflow deviation.

9. The heat treatment equipment for an aluminum alloy necked forged flange according to claim 1, characterized in that: A cooling channel is provided between the furnace water tank (1) and the heat treatment furnace cavity (5). The cooling medium in the furnace water tank (1) can enter the cooling channel through the control valve pipe (7) to cool the outer wall of the heat treatment furnace cavity (5) and realize the temperature control of the furnace body. The heat treatment heating cavity (3) is a gas-fired heating cavity. Its combustion end extends into the heat treatment furnace cavity (5). The flue gas generated by combustion is filtered through the heat treatment furnace cavity (5) and the gas filter assembly (4) in sequence before being discharged. The waste heat of the flue gas is recovered to the furnace water tank (1) through the waste heat recovery assembly (2).

10. A heat treatment apparatus for an aluminum alloy forged flange with neck according to any one of claims 1-9 is now proposed, along with a heat treatment method for the aluminum alloy forged flange with neck, characterized in that... It consists of the following steps: S1. Workpiece placement: The staff opens the furnace door on one side of the heat treatment furnace cavity (5) and neatly places the forged aluminum alloy neck forged flange on the tooling rack inside the heat treatment furnace cavity (5) to ensure that the flange workpiece is placed evenly and to avoid uneven heating caused by stacking of workpieces. After the workpiece is placed, the furnace door is closed and locked to make the heat treatment furnace cavity (5) a closed heat treatment space. The sealing of each pipeline and control valve (7) is checked to ensure that there is no risk of air or water leakage in the equipment. S2. Heating and heat treatment: The staff starts the heat treatment heating chamber (3) and uses gas combustion to supply heat. The combustion end delivers high-temperature heat source to the heat treatment furnace chamber (5) to perform segmented gradient heating of the aluminum alloy neck forged flange in the furnace chamber. S3. Flue gas treatment. The high-temperature flue gas generated by the combustion in the heat treatment heating chamber (3) flows into the waste heat recovery component (2) after flowing inside the furnace chamber. The flue gas enters the heat exchange shell (22) through the docking seat (21). Under the blocking and guiding effect of the flow guide baffle (252) and heat exchange fins (251) in the sealing partition (25), a folding flow path is formed, which prolongs the flue gas heat exchange time. Throughout the heat treatment operation, the motor (45) continuously drives the drive shaft (416) to rotate stably, driving the blades (414) and the paddle (415) to rotate synchronously. The rotating blades (414) stir the airflow inside the upper chamber (43) of the filter chamber to assist the flow of waste gas. The paddle (415) is attached to the inner and outer surfaces of the filter cylinder (413) for cyclic scraping. S4. After the heat treatment and heat preservation process is completed, the staff closes the gas supply to the heat treatment heating chamber (3) and opens the control valve pipe (7) so that the cooling medium inside the furnace water tank (1) circulates into the cooling channel on the outer wall of the heat treatment furnace chamber (5). The circulating cooling medium uniformly cools the outer wall of the furnace chamber, so that the temperature inside the furnace can be slowly and controllably reduced.

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