Energy-saving electric sintering furnace

Abstract

The application belongs to the technical field of sintering furnaces, and specifically discloses an energy-saving electric sintering furnace, which comprises an electric sintering furnace body, a cooling furnace body, an electric control heating mechanism, a high-temperature-resistant electric material loading vehicle, a waste heat storage mechanism and a gate lifting mechanism. The electric sintering furnace body is connected with the cooling furnace body in communication through a connecting bin on the inner side. The gate lifting mechanism is located in the connecting bin and is used for opening and closing and separating operations. The electric sintering furnace body and the cooling furnace body are internally jointly provided with two groups of symmetrically distributed guide rails. The high-temperature-resistant electric material loading vehicle is located in the electric sintering furnace body, and the high-temperature-resistant electric material loading vehicle is slidably arranged outside the two groups of guide rails. The application realizes closed and continuous operation of sintering and cooling, greatly improves the equipment utilization rate and product quality, breaks the energy fragmentation situation of the traditional process through sintering waste heat storage, cooling waste heat recycling and fine cooling, significantly reduces the electric energy consumption and heat waste, has energy-saving and high-efficiency properties, and meets the development direction of green manufacturing.

Description

Technical Field

[0001] This invention belongs to the field of sintering furnace technology, and specifically discloses an energy-saving electric sintering furnace. Background Technology

[0002] In high-temperature sintering processes, the electric sintering furnace is the core equipment for achieving material densification and microstructural transformation. Traditional production methods typically separate the sintering and cooling processes. After the workpiece is held at high temperature in the sintering furnace, it must wait for the furnace to cool naturally to a certain temperature, or the operator must transfer the high-temperature workpiece to a separate cooling area for further processing. This separated operation method has the following prominent problems:

[0003] Firstly, after completing the sintering process, the electric sintering furnace, due to its structural limitations, cannot be cooled, resulting in a significant amount of time being occupied and causing the furnace to remain in a waiting or idle state for extended periods, thus significantly reducing equipment utilization. If a hot transfer method is adopted, an additional high-temperature handling device is required, and the workpieces are susceptible to temperature shocks during transfer, increasing the risk of cracking and oxidation.

[0004] Secondly, the large amount of sensible heat generated by the existing electric sintering furnace during the cooling stage is directly dissipated into the workshop environment, which not only exacerbates the heat load of the plant but also wastes the potential for waste heat recovery. At the same time, the sintering furnace still needs to continuously consume electricity to maintain the process temperature during the heating and holding stages, resulting in an energy disconnect between "heat loss at the cooling end and electrical energy input at the heating end," leading to a low overall energy efficiency level.

[0005] Third, existing combined furnace solutions lack sufficient integration. Although some existing technologies propose a combined structure of sintering furnace and cooling furnace, most only achieve physical series or parallel connection, lacking active coupling of hot airflow and energy between the two furnaces. Specifically, the cooling furnace usually uses independent fans for forced air cooling, and the cold air absorbs heat from the workpiece and is directly discharged without any directional utilization of the generated hot air; the sintering furnace's air inlet still mainly uses ambient temperature air or an independent preheating source, failing to utilize the hot air discharged from the cooling furnace as an auxiliary heat source. In addition, existing combined furnaces lack precise control over the cooling process, often using full-volume cooling in an empty furnace, further increasing ineffective energy consumption.

[0006] To address the aforementioned issues, it is urgent to construct a combined sintering and cooling device with cascaded thermal energy utilization and directional cooling functions within the overall architecture of the combined furnace, thereby further improving thermal efficiency and overall equipment utilization. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the background art by proposing an energy-saving electric sintering furnace, comprising an electric sintering furnace body, a cooling furnace body, an electrically controlled heating mechanism, a waste heat storage mechanism, and a gate lifting mechanism. The electric sintering furnace body is connected to the cooling furnace body through a connecting compartment on one side of its interior. The gate lifting mechanism is located inside the connecting compartment and is used for opening, closing, and separation operations. Two sets of symmetrically distributed guide rails are installed inside both the electric sintering furnace body and the cooling furnace body. The high-temperature resistant electric material carrier is located inside the electric sintering furnace body and slides on the two sets of guide rails. Externally, the high-temperature resistant electric material carrier transports the sintered workpiece to the cooling furnace body for cooling. A cooling mechanism is provided on one side of the cooling furnace body. The cooling furnace body is connected to two sets of symmetrical sliding sliders via an X-axis ball screw mechanism on the inner side. The internal threads of the two sets of sliders are arranged in opposite directions. U-shaped square tubes are fixedly installed on the outer side of both sets of sliders. Multiple elbow nozzles are provided on the outer surface of the two sets of U-shaped square tubes on the side away from each other. A ventilation mechanism is provided on the upper part of the interior of the two sets of U-shaped square tubes. An air supply mechanism is provided on the upper part of one side of the cooling furnace body.

[0008] In the above technical solution, the electrically controlled heating mechanism further includes an electric heater embedded in one side of the electric sintering furnace body, and temperature control devices are provided at both ends of the electric heater.

[0009] In the above technical solution, the waste heat storage mechanism further includes a waste heat tank located at the rear end of the electric sintering furnace body. An exhaust fan is installed above the interior of the electric sintering furnace body. A connecting pipe is installed inside one end of the exhaust fan. The lower end of the connecting pipe extends into the waste heat tank. A one-way valve is installed on one side of the connecting pipe.

[0010] In the above technical solution, the lifting mechanism further includes a heat-insulating gate plate that is sealed and slidably installed above the inside of the connecting chamber. Lifting hydraulic cylinders are symmetrically installed on the top of the cooling furnace body. L-shaped frames are installed on the telescopic ends of the two sets of lifting hydraulic cylinders. The lower ends of the two sets of L-shaped frames are connected to the top of the heat-insulating gate plate.

[0011] In the above technical solution, the ventilation mechanism further includes a storage box, a pipe frame is fixedly installed on the top wall of the cooling furnace body, a guide pipe is provided inside the pipe frame, a straight pipe is connected to the bottom of the guide pipe, the end of the guide pipe away from the straight pipe is connected to the inside of the storage box, telescopic pipes are connected to both ends of the inside of the storage box, and air inlet pipes are connected to the ends of the two telescopic pipes that are far apart from each other, and the lower end of the air inlet pipe is connected to the inside of the U-shaped square tube.

[0012] In the above technical solution, the gas supply mechanism further includes a vacuum pump, which is fixedly installed at the rear end of the exterior of the cooling furnace body. The inlet end of the vacuum pump extends into the interior of the cooling furnace body, and the outlet end of the vacuum pump extends into the interior of the electric sintering furnace body.

[0013] In the above technical solution, the cooling mechanism further includes an axial flow fan installed inside one side of the cooling furnace body. An air-gathering box is externally sealed to the side of the axial flow fan near the cooling furnace body. The end of the straight pipe away from the guide pipe is connected to the inside of the air-gathering box. A three-way cooling pipe is inserted inside the air-gathering box. A cooling delivery pump is connected to the end of the three-way cooling pipe away from the air-gathering box. The cooling delivery pump is fixedly installed on the rear side of the outside of the cooling furnace body.

[0014] In the above technical solution, further, support plates are fixedly installed on both sides of the U-shaped square tube and at the end near the elbow nozzle. Fixed plates are symmetrically installed on the outer side of the two support plates that are close to each other. Second multi-section hydraulic rods are fixedly installed on the upper and lower sides of the two fixed plates. Movable plates are installed on the telescopic ends of the two second multi-section hydraulic rods. A multi-fold guide plate is provided between the movable plate and the fixed plate. The outer surface of one side of the multi-fold guide plate is close to the jet direction of the corresponding elbow nozzle. The multi-fold guide plate is composed of folded curtains.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This invention arranges the main body of the electric sintering furnace and the main body of the cooling furnace side by side, and achieves controllable communication between the two furnaces through a connecting bin and a gate lifting mechanism. Combined with guide rails and a high-temperature resistant electric trolley, the workpiece can be directly transferred to the cooling furnace for rapid cooling in a closed environment after sintering, without waiting for the furnace to cool naturally or requiring external transfer of the high-temperature workpiece. This design effectively shortens the sintering furnace's operating cycle, improves equipment utilization, and avoids the risks of oxidation, cracking, and thermal shock to the workpiece during transfer, ensuring product quality stability.

[0017] 2. This invention includes a gas supply mechanism between the cooling furnace body and the electric sintering furnace body. This mechanism actively transports the hot gas, carrying heat after heat exchange inside the cooling furnace, into the electric sintering furnace, serving as an auxiliary heat source for the heating process in the sintering section. This hot gas reuse enables the recovery and reuse of heat lost during the cooling stage, reducing the electrical energy consumption of the main heating elements in the electric sintering furnace. It breaks the traditional energy separation between cooling heat dissipation and heating power consumption, significantly improving the overall energy efficiency of the equipment.

[0018] 3. This invention incorporates a U-shaped square tube inside the cooling furnace, driven by an X-axis ball screw mechanism. This U-shaped tube and elbow nozzles provide targeted and directional cooling to the workpiece, ensuring precise application of cold air to the high-temperature workpiece surface rather than forced cooling across the entire furnace cavity. Compared to traditional blower-cooled furnaces using full-volume airflow, this structure significantly improves cooling efficiency, reduces ineffective flow and energy loss of the cooling medium, and achieves refined control of the cooling process.

[0019] 4. This invention features an independent waste heat storage mechanism located outside the main body of the electric sintering furnace. An extraction mechanism guides excess heat generated inside the furnace to a waste heat tank for heat exchange and storage. The recovered heat can be used for heating, cleaning, or preheating other media within the factory area, expanding the avenues for waste heat utilization and avoiding thermal pollution and energy waste caused by direct heat release into the environment. This aligns with the development direction of green manufacturing and energy conservation.

[0020] 5. The present invention further includes a flow guiding component on the movable cooling assembly. The multi-fold flow guiding plate adjusts the direction of the cooling airflow ejected from the elbow nozzle, optimizing the spraying effect of the cooling airflow on one side of the elbow nozzle. Simultaneously, the multi-fold flow guiding plate can be retracted according to the outer contour of the workpiece, allowing for adaptive adjustment under sufficient cooling conditions, ensuring that the U-shaped square tube does not obstruct movement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is another schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection structure between the inner part of the electric sintering furnace body and the cooling furnace body of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure of the inner part of the cooling furnace body of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection structure between the cooling mechanism and the ventilation mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure between the U-shaped square tube and the multi-fold guide plate of the present invention;

[0027] Figure 7 This is a schematic diagram from another angle showing the connection structure between the U-shaped square tube and the multi-fold guide plate of the present invention.

[0028] In the diagram: 1. Main body of electric sintering furnace; 2. Main body of cooling furnace; 3. Electric heater; 4. Temperature control unit; 5. Exhaust fan; 6. L-shaped frame; 7. Lifting hydraulic cylinder; 8. Insulation gate; 9. Axial flow fan; 10. Three-way cooling pipe; 11. Cooling transfer pump; 12. Waste water tank; 13. Connecting compartment; 14. Exhaust pump; 15. Connecting pipe; 16. One-way valve; 17. U-shaped square tube; 18. High-temperature resistant electric material carrier; 19. Guide rail; 20. Movable plate; 21. Air collection box; 22. Pipe frame; 23. Storage box; 24. Telescopic pipe; 25. Straight pipe; 26. Elbow nozzle; 27. X-axis ball screw mechanism; 28. Slider; 29. ​​Air inlet pipe; 30. Guide pipe; 31. Multi-fold guide plate; 32. Support plate; 33. Fixing plate; 34. Second multi-section hydraulic rod. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0031] like Figures 1-7 The energy-saving electric sintering furnace shown includes an electric sintering furnace body 1, a cooling furnace body 2, an electrically controlled heating mechanism, a high-temperature resistant electric material carrier 18, a waste heat storage mechanism, and a gate lifting mechanism. The electric sintering furnace body 1 is connected to the cooling furnace body 2 through a connecting compartment 13 on one side. The gate lifting mechanism is located inside the connecting compartment 13 and is used for opening, closing, and separation operations. Two sets of symmetrically distributed guide rails 19 are installed inside both the electric sintering furnace body 1 and the cooling furnace body 2. The high-temperature resistant electric material carrier 18 is located inside the electric sintering furnace body 1 and slides outside the two sets of guide rails 19. The electric material carrier 18 transports the sintered workpiece to the cooling furnace body 2 for cooling. A cooling mechanism is provided on one side of the cooling furnace body 2. The cooling furnace body 2 is connected to two sets of symmetrical sliding sliders 28 through the X-axis ball screw mechanism 27 on the inner side. The internal threads of the two sets of sliders 28 are arranged in opposite directions. U-shaped square tubes 17 are fixedly installed on the outer side of the two sets of sliders 28. Multiple elbow nozzles 26 are provided on the outer surface of the side of the two sets of U-shaped square tubes 17 that are far apart from each other. A ventilation mechanism is provided on the upper part of the two sets of U-shaped square tubes 17. An air supply mechanism is provided on the upper part of one side of the cooling furnace body 2.

[0032] In this embodiment, the electric sintering furnace body 1 and the cooling furnace body 2 are integrated parallel structures. They are connected by a connecting chamber 13 located on one side of the electric sintering furnace body 1. A lifting gate mechanism is sealed inside the connecting chamber 13, serving as a separation component for opening and closing the two furnace bodies. During the sintering stage, the gate is closed to achieve thermal isolation of the furnace bodies, and during the transfer stage, it is opened to connect the workpiece channels. Structurally, this prevents the ineffective loss of sintering heat to the cooling furnace side, reducing heat loss. Two sets of symmetrically distributed guide rails 19 are installed inside the electric sintering furnace body 1 and the cooling furnace body 2, serving as precise guiding structures for workpiece transfer and ensuring the stability of workpiece movement between the two furnace bodies. A high-temperature resistant electric trolley 18 automatically transfers the sintered workpieces from the electric sintering furnace body 1 to the cooling furnace body 2, replacing manual high-temperature handling, avoiding thermal shock, oxidation, and cracking during workpiece transfer, improving product quality stability, and saving transfer waiting time, thus increasing equipment operating efficiency.

[0033] Under the connection of the X-axis ball screw mechanism 27, the two sets of sliders 28 with opposite threads slide closer or further apart. The sliders 28 drive the U-shaped square tube 17 to slide inside the cooling furnace body 2, causing multiple elbow nozzles 26 to spray in a directional and fixed-point manner, thereby avoiding the ineffective energy consumption of air volume cooling in traditional empty furnaces and improving cooling efficiency.

[0034] The electric heating mechanism includes an electric heater 3 embedded in one side of the electric sintering furnace body 1, and temperature control devices 4 are provided at both ends of the electric heater 3.

[0035] In this embodiment, the electric heater 3 can adjust the temperature inside the electric sintering furnace body 1 under the monitoring of the temperature control device 4;

[0036] Temperature control 4 is a temperature monitoring controller, and electric heater 3 is an electric heating element used in conventional sintering furnaces in the prior art.

[0037] The waste heat storage mechanism includes a waste heat tank 12 located at the rear end of the electric sintering furnace body 1. An exhaust fan 5 is installed inside the upper part of the electric sintering furnace body 1. A connecting pipe 15 is installed inside one end of the exhaust fan 5. The lower end of the connecting pipe 15 extends into the waste heat tank 12. A one-way valve 16 is installed on one side of the connecting pipe 15.

[0038] In this embodiment, the waste water tank 12 is made of heat-insulating material and can be filled with water. The exhaust fan 5 is a high-temperature resistant centrifugal fan, which is installed above the inside of the electric sintering furnace body 1 through a flange. When the electric sintering furnace body 1 is performing sintering operations, a large amount of excess high-temperature hot gas will be generated in the furnace. After the sintering operation is completed, the exhaust fan 5 is started to continuously extract the high-temperature hot gas in the furnace and transport it to the water in the waste water tank 12 through the connecting pipe 15. The high-temperature hot gas and cold water are in full contact to exchange heat and realize the collection of sintering waste heat. The low-temperature gas after heat exchange can be discharged from the exhaust port of the waste water tank 12 itself. The one-way valve 16 inside the connecting pipe 15 can prevent the hot water in the waste water tank 12 from flowing back into the exhaust fan 5, and also prevent the hot gas from flowing back.

[0039] The gate lifting mechanism includes a heat-insulating gate plate 8 that is sealed and slidably installed inside the connecting chamber 13. Lifting hydraulic cylinders 7 are symmetrically installed on the top of the cooling furnace body 2. L-shaped frames 6 are installed on the telescopic ends of the two sets of lifting hydraulic cylinders 7. The lower ends of the two sets of L-shaped frames 6 are connected to the top of the heat-insulating gate plate 8.

[0040] In this embodiment, the heat-insulating gate 8 is a composite heat-insulating structure, which is made of an outer layer of high-temperature resistant steel plate and an inner layer of aluminum silicate insulation cotton. Its size matches the cavity cross-sectional size of the connecting chamber 13.

[0041] When the electric sintering furnace body 1 is sintering, the two sets of lifting hydraulic cylinders 7 are driven synchronously, and the insulation gate 8 is driven to slide downward through the L-shaped frame 6 until the insulation gate 8 is completely in contact with the bottom of the connecting chamber 13, so as to achieve complete sealing separation between the electric sintering furnace body 1 and the cooling furnace body 2, and can be lifted during transportation.

[0042] The ventilation mechanism includes a storage box 23. A pipe frame 22 is fixedly installed on the top wall of the cooling furnace body 2. A guide pipe 30 is provided inside the pipe frame 22. A straight pipe 25 is connected to the bottom of the guide pipe 30. The end of the guide pipe 30 away from the straight pipe 25 is connected to the inside of the storage box 23. Both ends of the storage box 23 are connected to telescopic pipes 24. The ends of the two telescopic pipes 24 away from each other are connected to an air inlet pipe 29. The lower end of the air inlet pipe 29 is connected to the inside of a U-shaped square tube 17. The cooling mechanism includes an axial flow fan 9 installed on one side inside the cooling furnace body 2. An air-gathering box 21 is externally sealed on the side of the axial flow fan 9 near the cooling furnace body 2. The end of the straight pipe 25 away from the guide pipe 30 is connected to the inside of the air-gathering box 21. A three-way cooling pipe 10 is inserted inside the air-gathering box 21. A cooling delivery pump 11 is connected to the end of the three-way cooling pipe 10 away from the air-gathering box 21. The cooling delivery pump 11 is fixedly installed on the rear side of the outside of the cooling furnace body 2.

[0043] In this embodiment, the telescopic pipe 24 adopts a corrugated telescopic structure, which has the characteristic of being stretchable. With the connection of the pipe frame 22, it can ensure that the guide pipe 30 is stably installed inside the cooling furnace body 2 for use.

[0044] When the axial flow fan 9 starts, it draws in outside air, and the resulting airflow enters the air collection box 21. The airflow is then gathered into a concentrated airflow in the air collection box 21. The concentrated airflow comes into full contact with the three-way cooling pipe 10 in the air collection box 21, and performs efficient heat exchange. The heat in the airflow is absorbed by the low-temperature cooling medium in the three-way cooling pipe 10, and the airflow temperature drops rapidly, forming a low-temperature and high-pressure cooling air. Under the pressure of the air collection box 21, the cooling air enters the straight pipe 25 from the air outlet, and is then transported to the U-shaped square pipe 17 through the guide pipe 30 and the storage box 23. Finally, it is sprayed onto the workpiece through the elbow nozzle 26 to achieve the cooling of the workpiece.

[0045] The cooling transfer pump 11 is a high-pressure liquid transfer pump. Its inlet end is connected to an external cooling medium storage tank, and its outlet end is connected to a three-way cooling pipe 10, providing power for the circulation of the cooling medium.

[0046] The gas supply mechanism includes a vacuum pump 14, which is fixedly installed at the rear end of the exterior of the cooling furnace body 2. The air inlet of the vacuum pump 14 extends into the interior of the cooling furnace body 2, and the air outlet of the vacuum pump 14 extends into the interior of the electric sintering furnace body 1.

[0047] In this embodiment, when the cooling furnace body 2 cools the workpiece, the low-temperature cooling air and the high-temperature workpiece exchange heat fully, forming a large amount of high-temperature hot air carrying heat, which accumulates in the upper middle part of the cooling furnace body 2. At this time, the air pump 14 is started to continuously extract the high-temperature hot air in the cooling furnace body 2 and deliver it to the heating zone of the electric sintering furnace body 1 through the air outlet. After the high-temperature hot air enters the sintering furnace, it works with the heating elements in the furnace to provide heat for the sintering operation, replacing part of the electric heating. When the electric sintering furnace body 1 is in the heating stage, the returned hot air can quickly increase the temperature in the furnace and shorten the heating time. When the electric sintering furnace body 1 is in the heat preservation stage, the returned hot air can supplement the heat loss in the furnace, reduce the working time of the heating elements, and reduce the power consumption.

[0048] Support plates 32 are fixedly installed on both sides of the U-shaped square tube 17 and at the end near the elbow nozzle 26. Fixing plates 33 are symmetrically installed on the side of the two support plates 32 that are close to each other. Second multi-section hydraulic rods 34 are fixedly installed on the top and bottom of the two fixing plates 33. Movable plates 20 are installed at the telescopic ends of the two second multi-section hydraulic rods 34. A multi-fold guide plate 31 is provided between the movable plate 20 and the fixing plate 33. The outer surface of one side of the multi-fold guide plate 31 is close to the jet direction of the corresponding elbow nozzle 26. The multi-fold guide plate 31 is composed of folded curtains.

[0049] In this embodiment, when cooling the workpiece, the second multi-section hydraulic rod 34 is extendable and retractable according to the outer contour shape of the workpiece and the cooling requirements. When it is necessary to intensify cooling of a specific part of the workpiece, the second multi-section hydraulic rod 34 extends, pushing the movable plate 20 to move away from the fixed plate 33, causing the multi-fold guide plate 31 to fully unfold. The unfolded multi-fold guide plate 31 directionally guides the cooling air ejected from the elbow nozzle 26, so that the cooling air is accurately sprayed onto the target part of the workpiece along the angle of the multi-fold guide plate 31, thereby achieving intensified cooling and avoiding the cooling air direction... The cooling air diffuses outwards, reducing energy consumption. When the U-shaped square tube 17 needs to be moved and adjusted with the slider 28, or when the workpiece has an irregular contour and the cooling air direction needs to be adjusted, the second multi-section hydraulic rod 34 retracts, pulling the movable plate 20 towards the fixed plate 33. This causes the multi-fold guide plate 31 to retract and be stored synchronously, reducing the space occupied by the guide component and preventing the guide component from colliding with the workpiece or furnace body during the movement of the U-shaped square tube 17. At the same time, the spray angle of the cooling air can be precisely adjusted by adjusting the degree of unfolding of the multi-fold guide plate 31 to adapt to the cooling needs of different parts of the workpiece.

[0050] Working principle: Before sintering, the two sets of lifting hydraulic cylinders 7 at the top of the cooling furnace body 2 are in a retracted state. Through the L-shaped frame 6, the heat preservation gate 8 is driven to slide into the connecting chamber 13, completely separating the electric sintering furnace body 1 from the cooling furnace body 2, preventing heat loss to the cooling furnace body 2 during the sintering stage. The electric sintering furnace body 1 independently completes the high-temperature sintering of the workpiece. The excess heat generated during the sintering process is extracted by the exhaust fan 5 at the top and transported to the waste heat tank 12 through the connecting pipe 15. The one-way valve 16 prevents the heat in the hot water tank from flowing back, realizing the collection and storage of sintering waste heat. The recovered heat can be used for subsequent utilization such as factory heating and medium preheating.

[0051] After the workpiece is sintered, the lifting hydraulic cylinder 7 drives the L-shaped frame 6 to lift the heat preservation gate 8 upward, opening the connecting chamber 13 to make the electric sintering furnace body 1 and the cooling furnace body 2 pass through. At this time, the high-temperature resistant electric material carrier 18 inside the electric sintering furnace body 1 slides from the electric sintering furnace body 1 to the cooling furnace body 2 along two sets of symmetrically distributed guide rails 19, directly transferring the sintered high-temperature workpiece into the cooling furnace body 2. The whole process is completed in a closed environment to avoid the risks of oxidation, cracking and thermal shock during the workpiece transfer process.

[0052] After the workpiece enters the main body 2 of the cooling furnace, the heat-insulating gate 8 falls again to seal the connecting chamber 13, the axial flow fan 9 starts, and the cooling delivery pump 11 delivers cooling medium to the three-way cooling pipe 10. The airflow generated by the axial flow fan 9 enters the sealed air-gathering box 21. After heat exchange through the three-way cooling pipe 10 in the air-gathering box 21, the airflow forms low-temperature cold air. The low-temperature cold air enters the guide pipe 30 through the straight pipe 25, and is then delivered to the storage box 23 by the guide pipe 30. It is then divided into two sets of U-shaped square pipes 17 by the telescopic pipe 24 and the air inlet pipe 29, and finally exits through the elbow nozzle 26. The air is sprayed onto the workpiece. The X-axis ball screw mechanism 27 drives two sets of sliders 28 with reversed internal threads to slide symmetrically, thereby moving the two sets of U-shaped square tubes 17 closer to or further away from the workpiece to adjust the cooling position. At the same time, the extension and retraction of the second multi-section hydraulic rod 34 on the outside of the U-shaped square tube 17 drives the movable plate 20 to move, adjusting the unfolding and retracting state of the multi-fold guide plate 31, guiding the jet direction of the elbow nozzle 26, so that the cold air flows on the outer contour of one side of the workpiece. This not only realizes the function of cooling the side of the workpiece, but also avoids the ineffective energy consumption of large-scale cooling in an empty furnace.

[0053] Finally, after the cold air exchanges heat with the high-temperature workpiece, hot air carrying heat is formed. The air pump 14 outside the cooling furnace body 2 extracts this hot air from inside the cooling furnace body 2 and directly transports it to the electric sintering furnace body 1 as an auxiliary heat source to participate in the heating and heat preservation of the sintering furnace, replacing part of the electricity consumption. This breaks the energy separation situation of heat dissipation at the cooling end and power consumption at the heating end in the traditional process, and realizes the closed-loop recovery and reuse of cooling waste heat. After the workpiece is cooled in the cooling furnace body 2, the cooling furnace body 2 is opened, and the workpiece is moved out by the external traction mechanism, and then waits for the sintering operation of the next batch of workpieces.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An energy-saving electric sintering furnace, comprising an electric sintering furnace body (1), a cooling furnace body (2), an electrically controlled heating mechanism, a high-temperature resistant electric material carrier (18), a waste heat storage mechanism, and a gate lifting mechanism, characterized in that, The main body (1) of the electric sintering furnace is connected to the main body (2) of the cooling furnace through a connecting chamber (13) on one side. The lifting mechanism is located inside the connecting chamber (13) and is used for opening, closing and separation operations. The main body (1) of the electric sintering furnace and the main body (2) of the cooling furnace are equipped with two sets of symmetrically distributed guide rails (19). The high-temperature resistant electric material carrier (18) is located inside the main body (1) of the electric sintering furnace and slides outside the two sets of guide rails (19). The high-temperature resistant electric material carrier (18) transports the sintered workpiece to the main body (2) of the cooling furnace for cooling. A cooling mechanism is provided on one side of the interior of the cooling furnace body (2). The cooling furnace body (2) is connected to two sets of symmetrical sliding sliders (28) through an X-axis ball screw mechanism (27) on the inner side. The internal threads of the two sets of sliders (28) are arranged in opposite directions. U-shaped square tubes (17) are fixedly installed on the outer side of the two sets of sliders (28). Multiple elbow nozzles (26) are provided on the outer surface of the two sets of U-shaped square tubes (17) on the side away from each other. A ventilation mechanism is provided on the upper part of the interior of the two sets of U-shaped square tubes (17). An air supply mechanism is provided on the upper part of one side of the interior of the cooling furnace body (2).

2. The energy-saving electric sintering furnace according to claim 1, characterized in that, The electric heating mechanism includes an electric heater (3) embedded in one side of the electric sintering furnace body (1), and temperature control devices (4) are provided at both ends of the electric heater (3).

3. The energy-saving electric sintering furnace according to claim 1, characterized in that, The waste heat storage mechanism includes a waste heat tank (12) located at the rear end of the electric sintering furnace body (1). An exhaust fan (5) is installed inside the upper part of the electric sintering furnace body (1). A connecting pipe (15) is installed inside one end of the exhaust fan (5). The lower end of the connecting pipe (15) extends into the waste heat tank (12). A one-way valve (16) is installed on one side of the connecting pipe (15).

4. The energy-saving electric sintering furnace according to claim 1, characterized in that, The lifting mechanism includes a heat-insulating gate plate (8) that is sealed and slidably installed above the inside of the connecting chamber (13). The cooling furnace body (2) is symmetrically equipped with lifting hydraulic cylinders (7). Both sets of lifting hydraulic cylinders (7) are equipped with L-shaped frames (6) at their telescopic ends. The lower ends of both sets of L-shaped frames (6) are connected to the top of the heat-insulating gate plate (8).

5. The energy-saving electric sintering furnace according to claim 1, characterized in that, The ventilation mechanism includes a storage box (23), a pipe frame (22) is fixedly installed on the top wall of the cooling furnace body (2), a guide pipe (30) is provided inside the pipe frame (22), a straight pipe (25) is connected to the bottom of the guide pipe (30), one end of the guide pipe (30) away from the straight pipe (25) is connected to the inside of the storage box (23), both ends of the storage box (23) are connected to telescopic pipes (24), and the ends of the two telescopic pipes (24) that are far apart from each other are connected to an air inlet pipe (29), and the lower end of the air inlet pipe (29) is connected to the inside of the U-shaped square tube (17).

6. The energy-saving electric sintering furnace according to claim 1, characterized in that, The gas delivery mechanism includes a vacuum pump (14), which is fixedly installed at the rear end of the cooling furnace body (2). The inlet end of the vacuum pump (14) extends into the interior of the cooling furnace body (2), and the outlet end of the vacuum pump (14) extends into the interior of the electric sintering furnace body (1).

7. An energy-saving electric sintering furnace according to claim 5, characterized in that, The cooling mechanism includes an axial flow fan (9) installed inside the cooling furnace body (2) on one side. The axial flow fan (9) is externally sealed with a wind-gathering box (21) on the side of the cooling furnace body (2). The end of the straight pipe (25) away from the guide pipe (30) is connected to the inside of the wind-gathering box (21). A three-way cooling pipe (10) is inserted inside the wind-gathering box (21). The end of the three-way cooling pipe (10) away from the wind-gathering box (21) is connected to a cooling delivery pump (11). The cooling delivery pump (11) is fixedly installed on the rear side of the cooling furnace body (2).

8. The energy-saving electric sintering furnace according to claim 1, characterized in that, Support plates (32) are fixedly installed on both sides of the U-shaped square tube (17) and at the end near the elbow nozzle (26). Fixing plates (33) are symmetrically installed on the side of the two support plates (32) that are close to each other. Second multi-section hydraulic rods (34) are fixedly installed on the top and bottom of the two fixing plates (33). Movable plates (20) are installed on the telescopic ends of the two second multi-section hydraulic rods (34). A multi-fold guide plate (31) is provided between the movable plate (20) and the fixing plate (33). The outer surface of one side of the multi-fold guide plate (31) is close to the jet direction of the elbow nozzle (26) that is close to it. The multi-fold guide plate (31) is composed of folded curtains.

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