Nitriding and oxidizing integrated furnace

Abstract

The application relates to a nitrogenizing and oxidizing integrated furnace and relates to the technical field of kilns. The nitrogenizing and oxidizing integrated furnace comprises a furnace body, a conveying device and a separation device. The separation device is arranged on the furnace body, the separation device separates the inner cavity of the furnace body into a closed nitrogenizing cavity and a closed oxidizing cavity, and the conveying device is arranged on the furnace body and used for conveying workpieces from the nitrogenizing cavity into the oxidizing cavity. The workpieces can pass through the separation device. The conveying device conveys the workpieces into the nitrogenizing cavity for nitrogenizing treatment. After the workpieces are nitrogenized, the conveying device conveys the workpieces into the oxidizing cavity for oxidizing treatment. Compared with the nitrogenizing treatment and oxidizing treatment mode of the prior art, the workpieces are placed in one furnace body and sequentially subjected to nitrogenizing treatment and oxidizing treatment, the workpieces do not need to be transferred from a nitrogenizing furnace to an oxidizing furnace by workers, the conveying time of the workpieces is saved, the labor intensity of the workers is reduced, and the processing efficiency of the workpieces is improved.

Description

Technical Field

[0001] This application relates to the field of kiln technology, and in particular to an integrated nitriding and oxidation furnace. Background Technology

[0002] A kiln is a furnace used for firing ceramics and sculptures or fusing enamel onto the surface of metal objects. It mainly includes wood-fired kilns, coal-fired kilns, electric kilns, and gas kilns. After processing, to improve the wear resistance and hardness of the workpiece, it needs to undergo nitriding and oxidation treatments. The equipment used for nitriding is a nitriding furnace, and the equipment used for oxidation is an oxidation furnace.

[0003] In related technologies, the method for nitriding and oxidizing workpieces is as follows: First, the workpiece is placed in a nitriding furnace for nitriding treatment. After the nitriding treatment is completed, the worker takes the workpiece out of the nitriding furnace and sends it to an oxidation furnace for oxidation treatment. After the oxidation treatment is completed, the worker takes the workpiece out of the oxidation furnace and sends it to the next process.

[0004] Regarding the aforementioned technologies, after the workpiece is nitrided, workers need to remove it from the nitriding furnace and then transport it to an oxidation furnace for oxidation treatment. This transport process takes a lot of time and affects the processing efficiency of the workpiece. Summary of the Invention

[0005] In order to improve the processing efficiency of workpieces, this application provides an integrated nitriding and oxidation furnace.

[0006] The integrated nitriding and oxidation furnace provided in this application adopts the following technical solution:

[0007] A nitriding and oxidation integrated furnace includes a furnace body, a conveying device, and a separating device;

[0008] The partition device is disposed on the furnace body, and the partition device divides the inner cavity of the furnace body into a sealed nitriding cavity and a sealed oxidation cavity.

[0009] The conveying device is installed on the furnace body and is used to convey the workpiece from the nitriding chamber to the oxidation chamber. The workpiece can pass through the separating device.

[0010] By adopting the above technical solution, the workpiece is placed on a conveying device, which transports the workpiece to the nitriding chamber for nitriding treatment. After nitriding, the conveying device transports the workpiece to the oxidation chamber for oxidation treatment. Compared with the existing technology of nitriding and oxidation treatment, by placing the workpiece in one furnace body for sequential nitriding and oxidation treatment, there is no need for operators to transfer the workpiece from the nitriding furnace to the oxidation furnace, saving workpiece transport time, reducing the labor intensity of operators, and improving workpiece processing efficiency. At the same time, by setting the nitriding chamber and oxidation chamber in the furnace body, compared with the separate nitriding furnace and oxidation furnace in the existing technology, the entire furnace structure is more compact and the furnace body footprint is reduced. In addition, there is no need for operators to wait for the workpiece to cool down before transporting it, reducing the possibility of the nitrided workpiece coming into contact with air, thereby reducing the probability of the nitrided workpiece being oxidized in the air, improving the workpiece processing quality, and further improving the workpiece processing efficiency.

[0011] Optionally, the separation device includes two air curtain machines, both of which are mounted on the furnace body. The gas blown out by the air curtain machines forms an air curtain to separate the nitriding chamber and the oxidation chamber, and the two air curtains do not interfere with each other.

[0012] By adopting the above technical solution, the designed separation device, on the one hand, seals the nitriding chamber and the oxidation chamber with two air curtains blown out by two air curtain machines, ensuring the sealing of the nitriding chamber and the oxidation chamber during the nitriding and oxidation processes of the workpiece, thereby facilitating the nitriding and oxidation processes of the workpiece; on the other hand, since the air curtain is formed by gas, when the conveying device transports the workpiece from the nitriding chamber to the oxidation chamber, it is convenient for the workpiece to directly pass through the air curtain and enter the oxidation chamber.

[0013] Optionally, the furnace body is provided with an exhaust pipe, the inner cavity of which is connected to the cavity formed by the two air curtains, and an exhaust fan is provided on the exhaust pipe.

[0014] By adopting the above technical solution, the designed exhaust pipe and exhaust fan facilitate the extraction of gas between the two air curtains, reduce the gas pressure between the two air curtains, and improve the safety performance of the furnace body.

[0015] Optionally, the furnace body is provided with a first sealing component for sealing the furnace body inlet;

[0016] The first blocking assembly includes a first gate and a first driving member for driving the first gate to rise and fall;

[0017] The first gate is slidably connected to the furnace body, and the top wall of the furnace body is provided with a first receiving groove for accommodating the first gate, and the first gate passes through the first receiving groove;

[0018] The first driving component is disposed on the outer wall of the furnace body.

[0019] By adopting the above technical solution, the designed first sealing component uses a drive component to drive the first gate to move up and down, which facilitates the control of the opening and closing of the furnace inlet.

[0020] Optionally, the first blocking assembly further includes a second gate and a second drive unit for driving the second gate to rise and fall;

[0021] The second gate is slidably connected to the furnace body, and the top wall of the furnace body is provided with a second receiving groove for accommodating the second gate, and the second gate passes through the second receiving groove;

[0022] The second gate, the furnace body, and the first gate together form a transition cavity, and the furnace body is provided with a vacuum pumping assembly for evacuating the transition cavity;

[0023] The second driving component is disposed on the outer wall of the furnace body.

[0024] By adopting the above technical solution, the designed second gate and second drive unit, on the one hand, drive the second gate to rise and fall, so that the first gate and the second gate jointly control the opening and closing of the inlet, improving the sealing performance of the nitriding chamber; on the other hand, when the workpiece is transported into the nitriding chamber, the first gate is first opened by the first drive unit, and the second gate is in the closed state. Then the workpiece is placed on the conveying device, so that the workpiece is located in the transition chamber. Then the first gate is closed, and the vacuuming component creates a vacuum environment in the transition chamber. Then the second gate is opened by the second drive unit, at which point the first gate is closed, and the conveying device transports the workpiece into the nitriding chamber. Finally, the second gate is closed to perform nitriding treatment on the workpiece. During the process of placing the workpiece into the furnace cavity, air is prevented from entering the nitriding chamber, which facilitates the nitriding treatment of the workpiece.

[0025] Optionally, the furnace body is provided with a second sealing assembly for sealing the furnace body outlet;

[0026] The second sealing component includes an air curtain machine, which is located at the end of the furnace body. The air blown out by the air curtain machine forms an air curtain for sealing the furnace body outlet.

[0027] By adopting the above technical solution, the designed second sealing component forms an air curtain at the furnace outlet through an air curtain machine. On the one hand, this ensures the sealing performance of the oxidation chamber. On the other hand, when the workpiece is oxidized in the oxidation chamber and then sent out of the furnace outlet by the conveying device, the workpiece can pass through the air curtain. Compared with the existing technology of sealing by a gate, there is no need to spend time opening and closing the gate, which further improves the processing efficiency of the workpiece.

[0028] Optionally, heating tubes are provided on both the inner wall of the nitriding chamber and the inner wall of the oxidation chamber.

[0029] By adopting the above technical solution, the designed heating tube facilitates the heating of the nitriding chamber and the oxidation chamber during the nitriding and oxidation process of the workpiece.

[0030] Optionally, an ammonia gas pipe is provided on the furnace body, and the inner cavity of the ammonia gas pipe is connected to the nitriding chamber.

[0031] By adopting the above technical solution, the designed ammonia pipe facilitates the introduction of ammonia gas into the nitriding chamber, thereby achieving the nitriding treatment of the workpiece.

[0032] Optionally, an oxygen pipe is provided on the furnace body, and the inner cavity of the oxygen pipe is connected to the oxidation chamber.

[0033] By adopting the above technical solution, the designed oxygen pipe facilitates the introduction of oxygen into the oxidation chamber, thereby achieving the oxidation treatment of the workpiece.

[0034] Optionally, the conveying device includes a roller conveyor for conveying workpieces, the roller conveyor being disposed on the furnace body.

[0035] By adopting the above technical solution, the workpieces are transported in a timely manner through a roller conveyor during the nitriding and oxidation process, realizing the assembly line nitriding and oxidation treatment of the workpieces without the need for manual transport, thus further improving the processing efficiency of the workpieces.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. A nitriding and oxidation integrated furnace is designed. By placing the workpiece on a conveying device, the conveying device transports the workpiece to the nitriding chamber for nitriding treatment. After nitriding, the conveying device transports the workpiece to the oxidation chamber for oxidation treatment. Compared with the existing technology of performing nitriding and oxidation treatment on workpieces, by placing the workpiece in one furnace body for nitriding and oxidation treatment in sequence, there is no need for the operator to transfer the workpiece from the nitriding furnace to the oxidation furnace, which saves the workpiece transportation time, reduces the labor intensity of the operator, and improves the processing efficiency of the workpiece.

[0038] 2. A nitriding and oxidation integrated furnace is designed. By setting a nitriding chamber and an oxidation chamber in the furnace body, the overall furnace structure is more compact and the furnace body occupies less floor space compared with the separate nitriding furnace and oxidation furnace in the prior art.

[0039] 3. A nitriding and oxidation integrated furnace is designed. On the one hand, two air curtains blown out by two air curtain machines seal the nitriding chamber and the oxidation chamber, ensuring the sealing of the nitriding chamber and the oxidation chamber during the nitriding and oxidation processes. On the other hand, since the air curtain is formed by gas, when the conveying device transports the workpiece from the nitriding chamber to the oxidation chamber, it is convenient for the workpiece to directly pass through the air curtain and enter the oxidation chamber for oxidation treatment.

[0040] 4. A nitriding and oxidation integrated furnace is designed. During the process of placing the workpiece into the furnace cavity, the cooperation of the first gate, the second gate and the vacuum pumping component prevents air from entering the nitriding chamber, which facilitates the nitriding treatment of the workpiece. Attached Figure Description

[0041] Figure 1 This is a first-view structural schematic diagram of an embodiment of this application;

[0042] Figure 2 This is a first-view cross-sectional view of an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of the overall structure from a second perspective of an embodiment of this application;

[0044] Figure 4 This is a cross-sectional view from a second perspective of an embodiment of this application.

[0045] Reference numerals: 1. Furnace body; 11. Nitriding chamber; 12. Oxidation chamber; 13. First through hole; 14. Exhaust pipe; 141. Exhaust fan; 142. Gas storage tank; 143. One-way valve; 15. First receiving tank; 16. Second receiving tank; 17. Transition chamber; 18. Second through hole; 19. Heating pipe; 2. Conveying device; 21. Roller conveyor; 3. Separating device; 31. Air curtain machine; 4. First sealing assembly; 41. First gate; 42. 43. Second gate; 44. First drive unit; 45. Second drive unit; 56. Vacuum assembly; 57. Vacuum pump; 58. Vacuum main pipe; 59. First branch pipe; 50. Second branch pipe; 51. Third branch pipe; 60. First valve; 71. Second sealing assembly; 82. Air curtain machine; 73. Ammonia pipe; 84. First air pump; 85. Ammonia tank; 86. Second valve; 97. Oxygen pipe; 108. Second air pump; 11. Oxygen tank; 12. Third valve. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0047] This application discloses an integrated nitriding and oxidation furnace.

[0048] Reference Figure 1 and Figure 2A nitriding and oxidation integrated furnace includes a furnace body 1, a conveying device 2 disposed on the furnace body 1, and a separating device 3 disposed on the furnace body 1. In this embodiment, the furnace body 1 is horizontally arranged, and the separating device 3 divides the inner cavity of the furnace body 1 into a closed nitriding cavity 11 and a closed oxidation cavity 12. The conveying device 2 is used to convey the workpiece from the nitriding cavity 11 to the oxidation cavity 12, and the workpiece can pass through the separating device 3.

[0049] By placing the workpiece on the conveying device 2, the conveying device 2 transports the workpiece to the nitriding chamber 11 for nitriding treatment. After the workpiece is nitrided, the conveying device 2 transports the workpiece to the oxidation chamber 12 for oxidation treatment. By placing the workpiece in a furnace body 1 for nitriding and oxidation treatment in sequence, there is no need for the staff to transfer the workpiece from the nitriding furnace to the oxidation furnace, which saves the workpiece transport time, reduces the labor intensity of the staff, and improves the processing efficiency of the workpiece.

[0050] Reference Figure 1 and Figure 2 The separating device 3 includes two air curtain machines 31. In this application, the two air curtain machines 31 can be installed on the top wall of the furnace body 1 or on the side wall of the furnace body 1, as long as they can separate and seal the nitriding chamber 11 and the oxidation chamber 12. In this embodiment, both air curtain machines 31 are installed on the top wall of the furnace body 1 by bolt connection, and the two air curtain machines 31 are arranged in parallel. The gas blown out by the air curtain machines 31 forms an air curtain for separating the nitriding chamber 11 and the oxidation chamber 12. The top wall has a first through hole 13 for communicating with the air inlet of each air curtain machine 31. The air curtain enters the inner cavity of the furnace body 1 through the first through hole 13 to separate the nitriding chamber 11 and the oxidation chamber 12. The two air curtains are arranged in parallel. In order to reduce the amount of air brought into the nitriding chamber 11 and the oxidation chamber 12 by the workpiece when passing through the air curtain, in this embodiment, ammonia can be introduced into the air inlet of the air curtain machine 31 near the nitriding chamber 11, and oxygen can be introduced into the air inlet of the air curtain machine 31 near the oxidation chamber 12. During the gas curtain operation, ammonia is introduced into the nitriding chamber 11 and oxidation is introduced into the oxidation chamber 12. This reduces the probability of air entering the nitriding chamber 11 and oxidation chamber 12, and facilitates the replenishment of ammonia and oxygen in the nitriding chamber 11 and oxidation chamber 12 accordingly, thereby ensuring the nitriding and oxidation effects of the workpiece. To facilitate the extraction of the mixed gas between the two gas curtains and reduce the gas pressure between them, an extraction pipe 14 is installed on the side wall of the furnace body 1 in this embodiment. The inner cavity of the extraction pipe 14 is connected to the cavity formed by the two gas curtains. An exhaust fan 141 is installed on the extraction pipe 14, and a gas storage tank 142 is installed at the end of the extraction pipe 14 away from the furnace body 1. A one-way valve 143 is installed on the extraction pipe 14 via a flange connection to prevent the mixed gas from flowing back into the inner cavity of the furnace body 1. The exhaust fan 141 extracts the mixed gas between the two gas curtains, allowing the mixed gas to enter the gas storage tank 142 through the extraction pipe 14 for storage, which helps to reduce the gas pressure between the two gas curtains.

[0051] Reference Figure 1 , Figure 2 and Figure 3 The furnace body 1 is provided with a first sealing assembly 4 for sealing the inlet of the furnace body 1. The first sealing assembly 4 includes a first gate 41, a second gate 42, a first driving member 43 for driving the first gate 41 to rise and fall, and a second driving member 44 for driving the second gate 42 to rise and fall. In this embodiment, the first gate 41 and the second gate 42 are both vertically arranged. The first gate 41 and the second gate 42 are slidably connected to the furnace body 1, and the second gate 42 is located between the first gate 41 and the nitriding chamber 11. The top wall of the furnace body 1 has a first receiving groove 15 for accommodating the first gate 41 and a second receiving groove 16 for accommodating the second gate 42. The first gate 41 passes through the first receiving groove 15, and the second gate 42 passes through the second receiving groove 16. The second gate 42, the furnace body 1, and the first gate 41 together form a transition cavity 17. A vacuuming assembly 5 for drawing a vacuum in the transition cavity 17 is provided on the furnace body 1. The first driving member 43 and the second driving member 44 are both provided on the outer wall of the furnace body 1. In this application, the first driving member 43 and the second driving member 44 can be cylinders or hydraulic cylinders, as long as they can drive the lifting and lowering of the first gate 41 and the second gate 42. In this embodiment, the first driving member 43 and the second driving member 44 are each two cylinders. The two cylinders are respectively installed on both sides of the furnace body 1. The cylinder piston rod is vertically arranged, and the top of the cylinder piston rod is welded to the top of the first gate 41 or the top of the second gate 42.

[0052] Reference Figure 3 and Figure 4 The vacuum assembly 5 includes a vacuum pump 51, a vacuum main pipe 52, a first branch pipe 53, a second branch pipe 54, and a third branch pipe 55. The vacuum pump 51 is installed on the side wall of the furnace body 1. One end of the vacuum main pipe 52 is connected to the vacuum pump 51 via a flange, and the other end is connected to the first branch pipe 53, the second branch pipe 54, and the third branch pipe 55 via a four-way connector. In this application, the connection method can be either a threaded connection or a flange connection, as long as the inner cavity of the vacuum main pipe 52, the inner cavity of the first branch pipe 53, and the... The inner cavities of the second branch pipe 54 and the third branch pipe 55 can be connected. In this embodiment, a threaded connection is preferred. The inner cavity of the first branch pipe 53 is connected to the transition cavity 17, the inner cavity of the second branch pipe 54 is connected to the nitriding cavity 11, and the inner cavity of the third branch pipe 55 is connected to the oxidation cavity 12. In order to facilitate the opening and closing of the inner cavities of the first branch pipe 53, the second branch pipe 54, and the third branch pipe 55, a first valve 56 is installed on each of the first branch pipe 53, the second branch pipe 54, and the third branch pipe 55 in this embodiment.

[0053] Reference Figure 2The conveying device 2 includes a roller conveyor 21 for conveying workpieces. The roller conveyor 21 is mounted on the furnace body 1. The ends of the rollers of the roller conveyor 21 extend out of the side wall of the furnace body 1. In this embodiment, the roller material of the roller conveyor 21 is silicon carbide. In this application, the roller material of the roller conveyor 21 can also be alumina, as long as it can convey workpieces in a high-temperature environment. The first gate 41, the second gate 42 and the air curtain pass through the gap between two adjacent rollers of the roller conveyor 21. The conveying direction of the roller conveyor 21 is parallel to the long side of the furnace body 1. In addition, since the drive part of the roller conveyor 21 is usually composed of chains and sprockets, which is the prior art, it will not be described in detail here.

[0054] Reference Figure 2 The furnace body 1 is provided with a second sealing component 6 for sealing the outlet of the furnace body 1. The second sealing component 6 includes an air curtain machine 61. In this application, the air curtain machine 61 can be installed on the top wall of the furnace body 1 or on the side wall of the furnace body 1, as long as it can seal the oxidation chamber 12. In this embodiment, the air curtain machine 61 is installed on the top wall of the furnace body 1 by bolt connection. The air curtain machine 61 is installed at the end of the outlet of the furnace body 1. The air curtain machine 61 is arranged in parallel with the air curtain machine 31. The air blown out by the air curtain machine 61 forms an air curtain for sealing the outlet of the furnace body 1. The top wall of the furnace body 1 is provided with a second through hole 18 for communicating with the air outlet of the air curtain machine 61. The air curtain enters the inner cavity of the furnace body 1 through the second through hole 18 to seal the oxidation chamber 12. In order to reduce the air brought into the nitriding chamber 11 and the oxidation chamber 12 when the workpiece passes through the air curtain, oxygen can be introduced into the air inlet of the air curtain machine 61 in this embodiment.

[0055] Reference Figure 1 and Figure 2 To facilitate heating of the nitriding chamber 11 and the oxidation chamber 12, in this embodiment, several heating pipes 19 are installed on the inner walls of both the nitriding chamber 11 and the oxidation chamber 12. The heating pipes 19 are vertically arranged and arrayed along the long side of the furnace body 1. To facilitate the introduction of ammonia into the nitriding chamber 11, an ammonia pipe 7 is installed on the side wall of the furnace body 1. The inner cavity of the ammonia pipe 7 is connected to the nitriding chamber 11. A first gas pump 71 is installed on the ammonia pipe 7 via a flange connection. An ammonia tank 72 is installed at the end of the ammonia pipe 7 away from the furnace body 1. A second valve 73 is installed on the ammonia tank 72 via a flange connection. To facilitate the introduction of oxygen into the oxidation chamber 12, an oxygen pipe 8 is installed on the side wall of the furnace body 1. The inner cavity of the oxygen pipe 8 is connected to the oxidation chamber 12. A second gas pump 81 is installed on the oxygen pipe 8 via a flange connection. An oxygen tank 82 is installed at the end of the oxygen pipe 8 away from the furnace body 1. A third valve 83 is installed on the oxygen tank 82 via a flange connection.

[0056] The implementation principle of the integrated nitriding and oxidation furnace in this application embodiment is as follows: During use, firstly, the air curtain machine 61 and two gas curtain machines 31 are started. The gas blown out by the air curtain machine 61 forms an air curtain, and the gas blown out by the two gas curtain machines 31 forms two gas curtains, achieving sealing of the nitriding chamber 11 and the oxidation chamber 12 respectively. Then, the one-way valve 143 is opened, and the exhaust fan 141 is started to draw the mixed air between the two gas curtains through the exhaust pipe 14 to the gas storage tank 142 for collection. Next, the first valve 56 on the second branch pipe 54 and the third branch pipe 55 is opened, and the vacuum pump 51 is started, creating a vacuum... Pump 51 performs vacuuming on the nitriding chamber 11 and the oxidation chamber 12. After vacuuming, the first valve 56 is closed, and the heating tube 19 is started. The heating tube 19 heats the nitriding chamber 11 and the oxidation chamber 12 until the temperatures of the nitriding chamber 11 and the oxidation chamber 12 reach the nitriding temperature and oxidation temperature of the workpiece, respectively, and then the temperatures are stabilized. Then, the first drive unit 43 is started, which drives the first gate 41 to rise, placing the workpiece on the roller of the roller conveyor 21. The first drive unit 43 is then started to drive the first gate 41 to fall until the first gate 41 falls. Completely close; then open the first valve 56 on the first branch pipe 53, start the vacuum pump 51 to evacuate the transition chamber 17, after evacuation is complete, close the first valve 56 and the vacuum pump 51, start the second drive unit 44, the second drive unit 44 drives the second gate 42 to rise, at this time start the roller conveyor 21 until the roller conveyor 21 transports the workpiece from the transition chamber 17 to the nitriding chamber 11, start the second drive unit 44 to drive the second gate 42 to fall until the second gate 42 is completely closed; then open the second valve 73, and the ammonia is pumped by the first air pump 71. Ammonia gas in gas tank 72 is transported to nitriding chamber 11 through ammonia gas pipe 7 to nitrid the workpiece. After the workpiece nitriding is completed, roller conveyor 21 transports the workpiece through two air curtains into oxidation chamber 12. At this time, the third valve 83 is opened, and oxygen in oxygen tank 82 is transported to oxidation chamber 12 through oxygen pipe 8 by the second air pump 81 to oxidize the workpiece. After the workpiece oxidation is completed, roller conveyor 21 transports the workpiece through the air curtain to the outlet end of furnace body 1, where it can be collected by staff.

[0057] Furthermore, when the workpiece in the nitriding chamber 11 is nitrided, the step of placing the workpiece into the transition chamber 17 can be repeated. The next workpiece that needs to be nitrided is placed into the transition chamber 17, and the transition chamber 17 is evacuated. When the workpiece in the nitriding chamber 11 is transported to the oxidation chamber 12, the next workpiece in the transition chamber 17 is transported to the nitriding chamber 11, thus realizing the nitriding and oxidation treatment of the next workpiece.

[0058] By placing the workpiece in a furnace body 1 for sequential nitriding and oxidation treatments, there is no need for workers to transfer the workpiece from the nitriding furnace to the oxidation furnace, saving workpiece transport time, reducing the labor intensity of workers, and improving workpiece processing efficiency.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nitriding and oxidation integrated furnace, characterized in that: It includes a furnace body (1), a conveying device (2), and a separating device (3); The partition device (3) is disposed on the furnace body (1), and the partition device (3) divides the inner cavity of the furnace body (1) into a closed nitriding cavity (11) and a closed oxidation cavity (12). The conveying device (2) is disposed on the furnace body (1) and is used to convey the workpiece from the nitriding chamber (11) to the oxidation chamber (12). The workpiece can pass through the separating device (3). The furnace body (1) is provided with a first sealing component (4) for sealing the inlet of the furnace body (1); The first blocking assembly (4) includes a first gate (41) and a first drive member (43) for driving the first gate (41) to rise and fall; The first gate (41) is slidably connected to the furnace body (1), and the top wall of the furnace body (1) is provided with a first receiving groove (15) for accommodating the first gate (41), and the first gate (41) passes through the first receiving groove (15). The first driving member (43) is disposed on the outer wall of the furnace body (1); The first blocking assembly (4) further includes a second gate (42) and a second drive unit (44) for driving the second gate (42) to rise and fall; The second gate (42) is slidably connected to the furnace body (1), and the top wall of the furnace body (1) is provided with a second receiving groove (16) for accommodating the second gate (42), and the second gate (42) passes through the second receiving groove (16); The second gate (42), the furnace body (1) and the first gate (41) together form a transition cavity (17), and the furnace body (1) is provided with a vacuum pumping assembly (5) for evacuating the transition cavity (17); The second driving member (44) is disposed on the outer side wall of the furnace body (1); The separation device (3) includes two air curtain machines (31), both of which are installed on the furnace body (1). The gas blown out by the air curtain machine (31) forms an air curtain to separate the nitriding chamber (11) and the oxidation chamber (12). The two air curtains do not interfere with each other. Ammonia is introduced into the air inlet of the air curtain machine (31) near the nitriding chamber (11), and oxygen is introduced into the air inlet of the air curtain machine (31) near the oxidation chamber (12). When the workpiece passes through the air curtain, it carries ammonia into the nitriding chamber (11) and carries oxidation into the oxidation chamber (12). The furnace body (1) is provided with an exhaust pipe (14), the inner cavity of the exhaust pipe (14) is connected to the cavity formed by the two air curtains, and an exhaust fan (141) is provided on the exhaust pipe (14).

2. The integrated nitriding and oxidation furnace according to claim 1, characterized in that: The furnace body (1) is provided with a second sealing component (6) for sealing the outlet of the furnace body (1); The second sealing component (6) includes an air curtain machine (61), which is located at the end of the furnace body (1). The air blown out by the air curtain machine (61) forms an air curtain for sealing the outlet of the furnace body (1).

3. The integrated nitriding and oxidation furnace according to claim 1, characterized in that: Heating tubes (19) are provided on the inner wall of both the nitriding chamber (11) and the oxidation chamber (12).

4. The integrated nitriding and oxidation furnace according to claim 1, characterized in that: An ammonia pipe (7) is provided on the furnace body (1), and the inner cavity of the ammonia pipe (7) is connected to the nitriding chamber (11).

5. The integrated nitriding and oxidation furnace according to claim 1, characterized in that: An oxygen pipe (8) is provided on the furnace body (1), and the inner cavity of the oxygen pipe (8) is connected to the oxidation chamber (12).

6. The integrated nitriding and oxidation furnace according to claim 1, characterized in that: The conveying device (2) includes a roller conveyor (21) for conveying workpieces, the roller conveyor (21) being mounted on the furnace body (1).

Images