Semi-continuous heat treatment equipment and heat treatment methods with independent operation in separate zones

Abstract

This invention discloses a semi-continuous heat treatment equipment and method with independent zoned operation. The heat treatment equipment includes a heating chamber, a cooling chamber, and a conveyor belt extending from the interior of the heating chamber to the interior of the cooling chamber. The conveyor belt is driven by an A motor and can reciprocate to transport the workpiece. A matching hatch is provided between the heating outlet of the heating chamber and the cooling inlet of the cooling chamber. The hatch is connected to an adjustment mechanism and can be lowered under the drive of the adjustment mechanism to block the heating outlet and cooling inlet, thus isolating the two furnace bodies, or raised under the drive of the adjustment mechanism to connect the two furnace bodies. This invention separates the heating chamber and cooling chamber, allowing the heating and quenching / cooling processes to operate in parallel and independently, greatly shortening the production cycle and avoiding energy waste. Moreover, the workpiece can move back and forth between the two chambers, thus adapting to the diverse heat treatment needs of workpieces made of different materials.

Description

Technical Field

[0001] This invention belongs to the field of heat treatment equipment, specifically relating to a semi-continuous heat treatment equipment and method for independent operation in different zones. Background Technology

[0002] Heat treatment equipment, as a key process tool in high-end manufacturing, plays a vital role in strengthening workpieces in fields such as aerospace, precision molds, and automotive parts. Currently, most mainstream gas quenching furnaces on the market adopt a "one furnace, multiple uses" single-unit structure, meaning that all processes, including heating, holding, quenching, and cooling, are completed sequentially within the same furnace chamber. While this integrated design offers advantages in terms of equipment compactness, from a production process perspective, its inherent sequential operation mode severely restricts overall production efficiency.

[0003] According to process time theory, in heat treatment processes, the heating and holding stages typically account for 70%-80% of the entire cycle, while the quenching and cooling stages account for only 20%-30%. However, in a single-furnace structure, after the workpiece has completed heating and holding, the furnace must wait for the entire cooling stage to finish before the next batch can be loaded and heated. During this period, the heating system is idle, while the furnace loses a significant amount of heat due to natural dissipation, resulting in a typical phenomenon of "equipment waiting time" and "ineffective heat dissipation" coexisting. From a thermodynamic perspective, this repeated heating and cooling process severely violates the principles of continuous and efficient energy utilization.

[0004] Furthermore, as the manufacturing industry evolves towards multi-variety, small-batch, and high-precision production, the limitations of traditional single-unit furnaces in terms of process switching flexibility and equipment turnover rate are becoming increasingly prominent. When the same equipment needs to process workpieces of different materials alternately, frequent adjustments to process parameters and restoration of furnace conditions further exacerbate the waste of time and energy. Therefore, how to break through the constraints of serial operation in traditional single-unit furnaces and achieve spatiotemporal decoupling between heating and cooling processes has become a core technical issue for improving the overall efficiency of heat treatment equipment. Summary of the Invention

[0005] To overcome the problem of low equipment utilization and energy waste in existing technologies, this invention proposes a semi-continuous heat treatment equipment with independent partitioned operations. This equipment separates the heating and cooling chambers, allowing the heating and quenching / cooling processes to run independently and in parallel. This eliminates equipment waiting time, improves equipment utilization, significantly shortens the production cycle, and eliminates the need for repeated heating and cooling of the furnace itself, thus avoiding energy waste. Furthermore, this invention uses a bidirectional conveyor belt to connect the two chambers and a vertically movable hatch between them, allowing workpieces to move back and forth between the two chambers. This achieves flexible compatibility between continuous production and tempering processes, adapting to the diverse heat treatment needs of workpieces made of different materials. Correspondingly, this invention also provides a semi-continuous heat treatment method with independent partitioned operations.

[0006] Regarding the equipment, the technical solution of this application is as follows:

[0007] A semi-continuous heat treatment equipment with independent zoned operations includes a heating chamber and a cooling chamber. The heating chamber includes a heating furnace body with a heating inlet and a heating outlet at its front and rear ends, respectively, and a front door at the heating inlet. A heating device is installed inside the heating furnace body for heating and holding the workpiece to achieve austenitization. The cooling chamber includes a cooling furnace body with a cooling inlet and a cooling outlet at its front and rear ends, respectively, and a rear door at the cooling outlet. A cooling device is installed inside the cooling furnace body for rapidly quenching and cooling the austenitized workpiece. It also includes a conveyor belt extending from the heating chamber to the cooling chamber. The conveyor belt is connected to a motor (A) and can move back and forth under the drive of the motor to transport the workpiece. A matching hatch is provided between the heating outlet and the cooling inlet. The hatch is connected to an adjustment mechanism and can be lowered under the drive of the adjustment mechanism to block the heating outlet and cooling inlet, isolating the two furnace bodies, or raised under the drive of the adjustment mechanism to connect the two furnace bodies.

[0008] Compared with existing technologies, the semi-continuous heat treatment equipment of the present invention, which features independent partitioning of the heating chamber and cooling chamber, allows the heating and quenching cooling processes to operate in parallel and independently. This eliminates equipment waiting time, improves equipment utilization, and significantly shortens the production cycle. Moreover, the heating chamber can maintain a high temperature continuously during operation without repeated start-ups and shutdowns, eliminating the need for repeated heating and cooling of the furnace body and avoiding energy waste. In addition, the present invention uses a bidirectional conveyor belt to connect the two chambers and sets up a door that can move up and down between the two chambers to separate and connect them, allowing the workpiece to move back and forth between the two chambers. This achieves flexible compatibility between continuous production line and tempering process, and can adapt to the diverse heat treatment needs of workpieces of different materials.

[0009] As an optimization, in the aforementioned semi-continuous heat treatment equipment with independent zoned operation, the adjustment mechanism includes a hanger mounted on the heating furnace body and a hydraulic cylinder mounted on the hanger; the hatch is fixedly connected to the hydraulic rod of the hydraulic cylinder. This results in a compact overall structure, convenient installation and maintenance; moreover, the hydraulic cylinder has a large driving force and smooth transmission, allowing for flexible adjustment of the hatch's lifting speed and preventing accidental hatch falls, thus ensuring high reliability. Furthermore, the outer wall of the cooling furnace body is equipped with guide rails, and the hatch is equipped with sliding grooves that slidably engage with the guide rails. Thus, the guide rails and sliding grooves work together to guide the hatch during lifting, ensuring smooth and stable lifting, and ensuring precise alignment of the hatch with the heating outlet and cooling inlet, achieving sealing of the heating outlet and cooling inlet. Furthermore, the hanger is equipped with two hydraulic cylinders symmetrically distributed about the hatch's centerline; the outer wall of the cooling furnace body is equipped with two guide rails symmetrically distributed about the hatch's centerline. This ensures uniform force distribution on the hatch during lifting, effectively preventing uneven loading, tilting, and jamming of the hatch.

[0010] As an optimization, in the aforementioned semi-continuous heat treatment equipment with independent zoned operations, the conveyor belt includes a belt body and a drive shaft, an A support shaft, and a B support shaft disposed within the belt body; the drive shaft is connected to the output shaft of motor A; both ends of the A support shaft are rotatably connected to the inner wall of the heating furnace body, and both ends of the B support shaft are rotatably connected to the inner wall of the cooling furnace body. By utilizing the A support shaft and B support shaft respectively positioned for the heating and cooling furnace bodies to form segmented supports, sagging and deviation of the belt body due to its large span length can be effectively avoided, resulting in a smoother conveyor belt operation.

[0011] As an optimization, in the aforementioned semi-continuous heat treatment equipment with independent zone operation, the heating device includes resistance heating strips disposed on the inner walls around the heating furnace body. This results in a simple and compact structure, convenient installation and arrangement, and the ability to achieve uniform and stable radiant heating. Furthermore, the resistance heating strips have a fast heating and cooling response, which is beneficial for energy saving and shortening the process cycle. In addition, when the resistance heating strips are damaged, they can be replaced in sections, making maintenance easier.

[0012] As an optimization, in the aforementioned semi-continuous heat treatment equipment with independent zoned operation, the cooling device includes an air-cooling system and a water-cooling system. This results in high cooling efficiency. Furthermore, the air-cooling system includes a centrifugal impeller and a B motor located at the top of the cooling furnace body; the water-cooling system includes cooling coils, and inlet and outlet water chambers located at both ends of the cooling coils; the cooling coils are arranged around the centrifugal impeller; the inlet and outlet water chambers are respectively connected to an external heat management water tank; the interior of the cooling furnace body is provided with an inner layer plate, forming an annular air duct between the inner layer plate and the inner wall of the cooling furnace body, and multiple circular holes are evenly distributed on the inner layer plate; a rectifier shroud is provided between the top of the inner layer plate and the centrifugal impeller.

[0013] As an optimization, in the aforementioned semi-continuous heat treatment equipment with independent zone operation, the heating furnace body is made of stainless steel, and the inner wall is lined with an insulation layer. This effectively reduces heat loss, improves heating efficiency, and also prevents the outer wall temperature of the heating furnace from becoming too high, thus enhancing the safety of equipment operation.

[0014] Regarding the method, the technical solution of this application is as follows:

[0015] A semi-continuous heat treatment method with independent partitioning is described above using the semi-continuous heat treatment equipment described in this application. Initially, the hatch blocks the heating outlet and cooling inlet, isolating the heating furnace and cooling furnace, and both the front door of the heating chamber and the rear door of the cooling chamber are closed. The heat treatment process is as follows: Step 1, open the front door of the heating chamber, place the workpiece to be treated onto the conveyor belt from the heating inlet, and drive the conveyor belt to rotate forward, transporting the workpiece into the heating furnace. Then close the front door of the heating chamber, and the heating device heats and holds the workpiece to achieve austenitization. Step 2... After heating and heat preservation, the adjusting mechanism drives the hatch to rise, and motor A drives the conveyor belt to rotate forward, transporting the workpiece into the cooling furnace. In step 3, the adjusting mechanism drives the hatch to fall, separating the two furnace bodies, and the cooling device performs rapid quenching and cooling on the workpiece. In step 4, if the workpiece does not require tempering, after quenching and cooling, the rear door of the cooling chamber is opened, and motor A drives the conveyor belt to rotate forward, transporting the workpiece to the cooling outlet. If the workpiece requires tempering, after quenching and cooling, the adjusting mechanism drives the hatch to rise, and motor A drives the conveyor belt to rotate in reverse, transporting the workpiece into the heating furnace, where the heating device performs tempering and heat preservation on the workpiece.

[0016] Compared with existing technologies, the semi-continuous heat treatment method of this application, which separates the heating and cooling processes and uses a bidirectional conveyor belt and a liftable door to achieve reciprocating transport of workpieces, allows heating and quenching / cooling to be carried out in parallel, eliminating equipment waiting time and improving production efficiency and energy utilization. On the other hand, according to process requirements, continuous quenching can be achieved on the production line when the conveyor belt rotates forward, and the workpiece can be sent back to the heating chamber for tempering when it rotates backward. There is no need for secondary loading and transfer. The process flow is simple, the equipment is highly adaptable, and the reciprocating transport of workpieces by the conveyor belt has a high degree of automation and reduces labor costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the semi-continuous heat treatment equipment with independent partitioned operation in Embodiment 1 of this application;

[0018] Figure 2 yes Figure 1 Left view of the heat treatment equipment (front door, rear door, and hatch removed);

[0019] Figure 3 yes Figure 2 Sectional view along line AA in the middle;

[0020] Figure 4 This is a schematic diagram of the gas flow and circulation within the cooling chamber during the quenching and cooling process.

[0021] Figure 5 These are schematic diagrams illustrating the heat treatment process of workpieces under different technologies.

[0022] The labels in the attached diagram are as follows: 1-Heating chamber, 11-Heating furnace body, 12-Front door, 13-Heating device, 101-Heating inlet, 102-Heating outlet; 2-Cooling chamber, 21-Cooling furnace body, 211-Guide rail, 22-Rear door, 23-Cooling device, 231-Centrifugal impeller, 232-Motor B, 233-Flat cover, 234-Cooling coil, 235-Water inlet chamber, 236-Water outlet chamber, 24-Inner plate, 241-Round hole, 201-Cooling inlet, 202-Cooling outlet; 3-Drive belt, 31-Belt body, 32-Drive shaft, 33-A support shaft, 34-B support shaft; 4-Adjusting mechanism, 41-Hanger, 42-Hydraulic cylinder; 5-Door. Detailed Implementation

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. Contents not described in detail in the following embodiments are all common knowledge in the art.

[0024] Example 1:

[0025] See Figure 1 and Figure 2The semi-continuous heat treatment equipment with independent partitioned operation in this embodiment includes a heating chamber 1 and a cooling chamber 2. The heating chamber 1 includes a heating furnace body 11. The heating furnace body 11 has a heating inlet 101 and a heating outlet 102 at its front and rear ends, respectively, and a front door 12 is hinged to the heating inlet 101. A heating device 13 is provided inside the heating furnace body 11 for heating and holding the workpiece to achieve austenitization. The cooling chamber 2 includes a cooling furnace body 21. The cooling furnace body 21 has a cooling inlet 201 and a cooling outlet 202 at its front and rear ends, respectively, and a rear door 22 is hinged to the cooling outlet 202. A cooling device 23 is provided inside the cooling furnace body 21 for rapid quenching and cooling of the austenitized workpiece. It also includes a self-heating chamber 1. A conveyor belt 3 extends into the cooling chamber 2; the conveyor belt 3 is connected to motor A 4 and can move back and forth under the drive of motor A 4 to transport workpieces; a matching hatch 5 is provided between the heating outlet 102 and the cooling inlet 201; the hatch 5 is connected to the adjusting mechanism 4 and can be lowered under the drive of the adjusting mechanism 4 to block the heating outlet 102 and the cooling inlet 201, thus isolating the two furnace bodies, or raised under the drive of the adjusting mechanism 4 to connect the two furnace bodies; during heat treatment, the conveyor belt 3 rotates forward to transport the workpieces in the heating chamber 1 to the cooling chamber 2 to achieve continuous quenching in a production line, or the conveyor belt 3 rotates in reverse to send the workpieces from the cooling chamber 2 back to the heating chamber 1 for tempering, so as to meet the diverse heat treatment needs of workpieces of different materials. The heating device 13, cooling device 23, motor A, and adjusting mechanism 4 are respectively connected to the control system signal.

[0026] In this embodiment, the adjustment mechanism 4 includes a hanger 41 mounted on the heating furnace body 11 and two hydraulic cylinders 42 mounted on the hanger 41. The two hydraulic cylinders 42 are symmetrically distributed about the center line of the hatch 5, and the hydraulic rods of the two hydraulic cylinders 42 are fixedly connected to the top two sides of the hatch 5, respectively. This results in a compact overall structure, convenient installation and maintenance; moreover, the hydraulic cylinders 42 have a large driving force and smooth transmission, enabling flexible adjustment of the hatch 5's lifting speed and preventing accidental falls, thus ensuring high reliability. Furthermore, the outer wall of the cooling furnace body 21 is provided with two guide rails 211 symmetrically distributed about the center line of the hatch 5, and the hatch 5 is provided with corresponding sliding grooves that slidably engage with the guide rails 211. Therefore, the guide rail 211 and the slide rail work together to guide the hatch 5 during its lifting and lowering process, ensuring that the hatch 5 lifts and lowers smoothly and accurately, and ensuring that the hatch 5 is precisely aligned with the heating outlet 102 and the cooling inlet 201. In addition, the structural design of the two hydraulic cylinders 42 and the two guide rails 211 makes the hatch 5 subjected to uniform force during lifting and lowering, effectively avoiding the hatch 5 from being unbalanced, tilted or jammed. Moreover, the symmetrical structure can also reduce the lateral wear of the hydraulic cylinders 5, guide rails 211 and slide rails, and improve the overall structural stability.

[0027] In this embodiment, the conveyor belt 3 includes a belt body 31 and a drive shaft 32, two A support shafts 33, and two B support shafts 34 disposed within the belt body 31. The drive shaft 32 is connected to the output shaft of an A motor, which is located inside the cooling furnace body 21. The two A support shafts 33 are respectively located at both ends of the heating furnace body 11, and both ends of the A support shafts 33 are rotatably connected to the inner wall of the heating furnace body 11. The two B support shafts 34 are respectively located at both ends of the cooling furnace body 21, and both ends of the B support shafts 34 are rotatably connected to the inner wall of the cooling furnace body 21. By using the A support shafts 33 and B support shafts 34 respectively located for the heating furnace body 11 and the cooling furnace body 21 to form segmented supports, the sagging and deviation of the belt body 31 due to its large span length can be effectively avoided, making the conveyor belt run more smoothly.

[0028] In this embodiment, the heating furnace body 11 is made of stainless steel, and the inner wall is lined with an insulation layer. This effectively reduces heat loss, improves heating efficiency, and also prevents the outer wall temperature of the heating furnace body 11 from becoming too high, thus enhancing the safety of the equipment.

[0029] In this embodiment, the cooling furnace body 21 is made of stainless steel, and the conveyor belt 3 is made of high-temperature resistant metal (such as stainless steel or high-temperature alloy).

[0030] Furthermore, the heating device 13 includes resistance heating strips disposed on the inner walls of the heating furnace body 11. The resistance heating strips are evenly distributed inside the insulation layer via insulating mounting bases, and each end of the resistance heating strip is connected to a conductive connector. These conductive connectors are electrically connected to an external power supply via terminals to achieve energized heating of the resistance heating strips. This design results in a simple and compact structure, convenient installation, and the ability to achieve uniform and stable radiant heating. Moreover, the resistance heating strips exhibit rapid heating and cooling response, which is beneficial for energy saving and shortening process cycles. Additionally, damaged resistance heating strips can be replaced in sections, making maintenance easier.

[0031] See Figure 3 In this embodiment, the cooling device 23 includes an air-cooling system and a water-cooling system; the air-cooling system includes a centrifugal impeller 231 and a B motor 232 located at the top of the cooling furnace body 21; the water-cooling system includes a cooling coil 234, and inlet chambers 235 and outlet chambers 236 located at both ends of the cooling coil 234; the cooling coil 234 is arranged around the centrifugal impeller 231; the inlet chambers 235 and outlet chambers 236 are respectively connected to an external heat management water tank; the interior of the cooling furnace body 21 is provided with an inner layer plate 24, forming an annular air duct between the inner layer plate 24 and the inner wall of the cooling furnace body 21, and a plurality of circular holes 241 are evenly opened on the inner layer plate 24; a rectifier 233 is provided between the top of the inner layer plate 24 and the centrifugal impeller 231. See also Figure 4During the quenching and cooling process, the cooling water in the heat management water tank enters from the inlet chamber 235, flows through the cooling coil 234, and then flows back into the heat management water tank from the outlet chamber 236, thus realizing the circulation of cooling water. Motor B 232 drives the centrifugal impeller 231 to rotate. When the gas thrown out from the centrifugal impeller 231 flows through the cooling coil 234, it exchanges heat with the cooling water in the cooling coil 234. The cooled gas flows downward along the annular air duct and is blown towards the high-temperature workpiece through the round hole 241 on the inner plate 24. After exchanging heat with the workpiece, it flows upward and is finally rectified by the rectifier shroud 233 and sucked into the centrifugal impeller 231, thus circulating.

[0032] In this embodiment, the rear two sides of the heating furnace body 11 are connected to the front two sides of the cooling furnace body 21, and there is a gap between the two furnace bodies that allows the hatch 5 to pass through; the bottom of the hatch 5 is provided with a U-shaped groove. When the hatch 5 is closed, the front and rear surfaces of the hatch 5 are respectively in contact with the outer walls of the heating furnace body 11 and the cooling furnace body 21, and the U-shaped groove is fitted onto the conveyor belt 3 (i.e., the conveyor belt 3 passes through the U-shaped groove), completely blocking the heating outlet 102 and the cooling inlet 201. To improve the sealing performance, a sealing strip can be provided at the contact points between the hatch 5 and the heating furnace body 11 and the cooling furnace body 21.

[0033] In the initial state of the heat treatment equipment in this embodiment, the hatch 5 blocks the heating outlet 102 and the cooling inlet 201, the heating furnace body 11 and the cooling furnace body 21 are in a state of isolation, and the front door 12 of the heating chamber 1 and the rear door 22 of the cooling chamber 2 are both in a closed state.

[0034] Example 2:

[0035] This embodiment provides a semi-continuous heat treatment method with independent operation in different zones. The heat treatment equipment described in Embodiment 1 is used to heat treat a batch of workpieces that do not require tempering (e.g., low-carbon steel, ordinary structural steel). Specifically, the method includes the following steps: Step 1, opening the front door 12 of heating chamber 1, and placing the workpieces to be treated from the heating inlet 101 onto the conveyor belt 3 via a loading mechanism (e.g., a robotic arm). Motor A drives the conveyor belt 3 to rotate forward, transporting the workpieces into the heating furnace body 11. Then, closing the front door 12 of heating chamber 1, the heating device 13 automatically controls the heating according to a preset process curve (based on the workpiece type). The workpiece is heated and held at a temperature of 1000℃ for 3-4 hours to achieve austenitization (heating temperature 1000℃, holding time 3-4 hours). Step 2: After heating and holding, the front door 12 of heating chamber 1 is opened, and the next workpiece to be processed is placed on conveyor belt 3 from heating inlet 101. Adjustment mechanism 4 drives door 5 to rise, and then motor A drives conveyor belt 3 to rotate forward, so that the workpiece at heating inlet 101 is transported to the interior of heating furnace 11, and the workpiece inside heating furnace 11 is transported to the interior of cooling furnace 21 (see [reference]). Figure 5(a) Step 3: Adjusting mechanism 4 drives door 5 to descend, separating the two furnace bodies. Cooling device 23 rapidly quenches and cools the workpieces in cooling furnace body 21 (usually 2-3 hours). At the same time, heating device 13 heats and keeps the workpieces in heating furnace body 11 (i.e., heating chamber 1 and cooling chamber 2 work simultaneously, processing their respective workpieces). Step 4: After one heat treatment is completed (in actual production, the cooling time does not exceed the heating time; when the heating time is long, cooling device 23 can be turned off, and subsequent conveying operations can be carried out after heating is completed), open the rear door 22 of cooling chamber 2 and the front door 12 of heating chamber 1. Place the third workpiece to be processed from heating inlet 101 onto conveyor belt 3. Adjusting mechanism 4 drives door 5 to rise, and motor A drives conveyor belt 3 to rotate forward, so that the workpiece at heating inlet 101 is conveyed to the inside of heating furnace body 11, the workpiece inside heating furnace body 11 is conveyed to the inside of cooling furnace body 21, and the workpiece inside cooling furnace body 21 is conveyed to cooling outlet 202 (removed by unloading mechanism). Repeat steps 3 and 4. That is, a workpiece to be processed is loaded, an unprocessed workpiece is transferred, and a processed workpiece is unloaded, and so on, forming an assembly line operation.

[0036] Example 3:

[0037] This embodiment provides a semi-continuous heat treatment method with independent operation in different zones. The heat treatment equipment described in Embodiment 1 is used to heat treat workpieces requiring tempering (e.g., high-carbon steel or alloy steel such as mold steel, tool steel, and bearing steel). Specifically, the method includes the following steps: Step 1, opening the front door 12 of the heating chamber 1, and placing the workpiece to be treated from the heating inlet 101 onto the conveyor belt 3 using a loading mechanism (e.g., a robotic arm). Motor A drives the conveyor belt 3 to rotate forward, transporting the workpiece into the heating furnace body 11; Step 2, closing the front door 12 of the heating chamber 1, and the heating device 13 operates according to a preset process curve. The workpiece is heated and held at a constant temperature to achieve austenitization. After heating and holding, the adjusting mechanism 4 drives the door 5 to rise, and motor A drives the conveyor belt 3 to rotate forward, transporting the workpiece into the cooling furnace 21. In step 3, the adjusting mechanism 4 drives the door 5 to fall, separating the two furnace bodies. The cooling device 23 performs rapid quenching and cooling on the workpiece, while the heating chamber 1 is in a low-power, unloaded holding state. After quenching and cooling, the cooling device 23 is turned off, the adjusting mechanism 4 drives the door 5 to rise, and motor A drives the conveyor belt 3 to rotate in reverse, transporting the workpiece back into the heating furnace 11 (see...). Figure 5(b) The heating device 13 performs tempering and heat preservation treatment on the workpiece (usually 500-600℃, the heat preservation time is adjusted according to the size and thickness of the workpiece, generally 2-3 hours); Step 4, after the tempering and heat preservation is completed, open the front door 12 of the heating chamber 1, place the next workpiece to be processed on the conveyor belt 3 from the heating inlet 101, the adjusting mechanism 4 drives the door 5 to rise, and the motor A drives the conveyor belt 3 to rotate forward, so that the workpiece at the heating inlet 101 is transported to the inside of the heating furnace body 11, and the workpiece inside the heating furnace body 11 is transported to the inside of the cooling furnace body 21; then the adjusting mechanism 4 The drive door 5 is lowered to separate the two furnace bodies. The heating device 13 heats and keeps the workpieces in the heating furnace body 11 warm, while the workpieces in the cooling furnace body 21 are naturally cooled to room temperature inside the furnace. In step 5, after heating and natural cooling are completed, the rear door 22 of the cooling chamber 2 is opened, the adjustment mechanism 4 drives the drive door 5 to rise, and motor A drives the conveyor belt 3 to rotate forward, so that the workpieces inside the heating furnace body 11 are transported to the cooling furnace body 21, and the workpieces inside the cooling furnace body 21 are transported to the cooling outlet 202 (removed by the unloading mechanism). The rear door 22 of the cooling chamber 2 is closed, and steps 3-5 are repeated.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made to the disclosed technical features in the above general description and / or specific embodiments (including examples) based on the disclosure of this application, without departing from the constituent elements of the invention, should be included within the protection scope of the present invention.

Claims

1. A semi-continuous heat treatment equipment for partitioned independent operation, comprising a heating chamber (1) and a cooling chamber (2); the heating chamber (1) comprises a heating furnace body (11); the heating furnace body (11) is respectively provided with a heating inlet (101) and a heating outlet (102) at the front end and the rear end, and a front door (12) is arranged at the heating inlet (101); a heating device (13) is arranged in the heating furnace body (11) for heating and heat preservation of a workpiece, so as to realize austenitization of the workpiece; the cooling chamber (2) comprises a cooling furnace body (21); the cooling furnace body (21) is respectively provided with a cooling inlet (201) and a cooling outlet (202) at the front end and the rear end, and a rear door (22) is arranged at the cooling outlet (202); a cooling device (23) is arranged in the cooling furnace body (21) for rapid quenching cooling of the workpiece after austenitization; characterized in that: It also includes a conveyor belt (3) extending from the interior of the heating chamber (1) to the interior of the cooling chamber (2); the conveyor belt (3) is connected to motor A and can move back and forth under the drive of motor A to realize the conveying of workpieces; a matching hatch (5) is provided between the heating outlet (102) and the cooling inlet (201); the hatch (5) is connected to the adjustment mechanism (4) and can be lowered under the drive of the adjustment mechanism (4) to block the heating outlet (102) and the cooling inlet (201) to separate the two furnace bodies, or raised under the drive of the adjustment mechanism (4) to connect the two furnace bodies.

2. The semi-continuous heat treatment equipment with independent zone operation according to claim 1, characterized in that: The adjustment mechanism (4) includes a hanger (41) on the heating furnace body (11) and a hydraulic cylinder (42) on the hanger (41); the hatch (5) is fixedly connected to the hydraulic rod of the hydraulic cylinder (42).

3. The semi-continuous heat treatment equipment with independent zone operation according to claim 2, characterized in that: The outer wall of the cooling furnace body (21) is provided with a guide rail (211), and the door (5) is provided with a sliding groove that slides in cooperation with the guide rail (211).

4. The semi-continuous heat treatment equipment with independent zone operation according to claim 3, characterized in that: The hanger (41) is provided with two hydraulic cylinders (42) symmetrically distributed about the center line of the hatch (5); the outer wall of the cooling furnace body (21) is provided with two guide rails (211) symmetrically distributed about the center line of the hatch (5).

5. The semi-continuous heat treatment equipment with independent zone operation according to claim 1, characterized in that: The conveyor belt (3) includes a belt body (31) and a drive shaft (32), an A support shaft (33) and a B support shaft (34) disposed within the belt body (31); the drive shaft (32) is connected to the output shaft of the A motor; the two ends of the A support shaft (33) are rotatably connected to the inner wall of the heating furnace body (11), and the two ends of the B support shaft (34) are rotatably connected to the inner wall of the cooling furnace body (21).

6. The semi-continuous heat treatment equipment with independent zone operation according to claim 1, characterized in that: The heating device (13) includes a resistance heating strip disposed on the inner wall around the heating furnace body (11).

7. The semi-continuous heat treatment equipment with independent zone operation according to claim 1, characterized in that: The cooling device (23) includes an air-cooled system and a water-cooled system.

8. The semi-continuous heat treatment equipment with independent zone operation according to claim 7, characterized in that: The air-cooling system includes a centrifugal impeller (231) and a B motor (232) located on the top of the cooling furnace body (21); the water-cooling system includes a cooling coil (234) and a water inlet chamber (235) and a water outlet chamber (236) located at both ends of the cooling coil (234); the cooling coil (234) is arranged around the centrifugal impeller (231); the water inlet chamber (235) and the water outlet chamber (236) are respectively connected to an external heat management water tank; the interior of the cooling furnace body (21) is provided with an inner plate (24), which forms an annular air duct with the inner wall of the cooling furnace body (21), and multiple round holes (241) are evenly opened on the inner plate (24); a shunting cover (233) is provided between the top of the inner plate (24) and the centrifugal impeller (231).

9. The semi-continuous heat treatment equipment with independent zone operation according to claim 1, characterized in that: The heating furnace body (11) is made of stainless steel and the inner wall is covered with a heat insulation layer.

10. A semi-continuous heat treatment method with independent operation in separate zones, characterized in that; This method is implemented using a semi-continuous heat treatment equipment with independent partitioned operation as described in claim 1; in the initial state, the hatch (5) blocks the heating outlet (102) and the cooling inlet (201), the heating furnace body (11) and the cooling furnace body (21) are in a separated state, and the front door (12) of the heating chamber (1) and the rear door (22) of the cooling chamber (2) are both in a closed state; the heat treatment process is as follows: Step 1: Open the front door (12) of the heating chamber (1), place the workpiece to be processed on the conveyor belt (3) from the heating inlet (101), drive the conveyor belt (3) to rotate forward and transport the workpiece to the interior of the heating furnace (11); then close the front door (12) of the heating chamber (1), and the heating device (13) heats and heats the workpiece to achieve austenitization of the workpiece; Step 2: After heating and heat preservation are completed, the adjustment mechanism (4) drives the hatch (5) to rise, and the A motor drives the conveyor belt (3) to rotate in the forward direction, transporting the workpiece to the inside of the cooling furnace body (21); Step 3: The adjusting mechanism (4) drives the hatch (5) to descend, separating the two furnace bodies, and the cooling device (23) rapidly quenches and cools the workpiece. Step 4: If the workpiece does not require tempering, after quenching and cooling, open the back door (22) of the cooling chamber (2), and drive the conveyor belt (3) to rotate forward to transport the workpiece to the cooling outlet (202); if the workpiece requires tempering, after quenching and cooling, drive the door (5) of the adjustment mechanism (4) to rise, drive the conveyor belt (3) to rotate in reverse to transport the workpiece to the interior of the heating furnace (11), and the heating device (13) performs tempering and heat preservation treatment on the workpiece.

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