Cover type multifunctional ion nitriding furnace

Abstract

The utility model discloses a cover type multifunctional ion nitriding furnace, which relates to the technical field of metal surface treatment and comprises a furnace body structure, a circulating structure, a heating structure, a sealing structure and a clamping structure. The furnace body structure forms an air guide channel through the inner-layer shell and the outer-layer shell, the centrifugal fan blades of the circulation structure drive nitrogen to be guided into the air guide channel from the interior of the furnace, two-stage electric heating wires of the heating structure are matched for heating twice, and the nitrogen heating efficiency and the temperature uniformity in the furnace are improved. The sealing structure adopts a double-layer hollow sealing ring, dynamic sealing is achieved through air pressure pressurization expansion, the clamping structure drives a clamping block and a furnace body clamping groove to be automatically locked through air pressure, and the installation process is simplified. According to the device, the problems of non-uniform heating, poor sealing performance and inconvenience in disassembly and assembly of traditional equipment are solved through circular heating of the air guide channel and linkage clamping design of the double-layer sealing ring and air pressure, and the nitriding treatment efficiency and the equipment reliability are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of metal surface treatment technology, and more specifically, to a bell-type multifunctional ion nitriding furnace. Background Technology

[0002] Ion nitriding is a heat treatment process that uses nitrogen ions to penetrate metal surfaces and form a reinforcing layer. It is widely used in machinery manufacturing, automotive parts, and other fields. Traditional ion nitriding furnaces typically use a single heating method, directly heating the workpiece and nitrogen gas through heating wires inside the furnace. However, this method suffers from problems such as uneven nitrogen circulation, large temperature variations within the furnace, and high energy consumption. Furthermore, the sealing between the furnace body and the base relies heavily on bolt fastening and static sealing rings, which are cumbersome to install and prone to leakage due to aging of the sealing rings after long-term use, affecting process stability.

[0003] In existing technologies, the nitrogen circulation path design of ion nitriding furnaces is simple, relying solely on a single fan to drive gas flow. This results in insufficient nitrogen heating, affecting nitriding efficiency. Furthermore, the furnace insulation layer is separated from the heat-conducting structure, making uniform heating difficult. Simultaneously, traditional sealing structures require repeated manual adjustment of bolt preload to maintain a tight seal, leading to high maintenance costs. Meanwhile, locking devices often employ mechanical latches, which are complex to operate and difficult to automate. These problems limit the efficiency improvement and equipment reliability of the ion nitriding process. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a bell-type multifunctional ion nitriding furnace to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A bell-type multifunctional ion nitriding furnace includes a furnace body structure, a circulation structure at the top of the furnace body structure, a heating structure installed inside the furnace body structure, and a sealing structure at the bottom of the furnace body structure. A base is fixedly connected to the bottom of the sealing structure, and a locking structure is installed inside the sealing structure. The furnace body structure achieves a sealed and locked connection with the base through the sealing structure and the locking structure. The furnace body structure achieves circulating heating of nitrogen gas and effective heating of the inner wall of the furnace body through the circulation structure and the heating structure.

[0007] Furthermore, the furnace structure includes a furnace shell, an air guide channel, an air inlet, an exhaust port, and a nitrogen port. The furnace shell is divided into inner and outer layers, and an air guide channel is formed between the inner and outer layers. An air inlet is provided at the top of the inner layer of the furnace shell, and an exhaust port is provided around the bottom of the inner layer of the furnace shell. The inner layer of the furnace shell is connected to a nitrogen port.

[0008] Furthermore, the circulation structure includes a drive motor, centrifugal fan blades, a first guide port, a second guide port, a connecting cone groove, and an air collecting groove. The drive end of the drive motor is connected to the centrifugal fan blades, and the centrifugal fan blades are respectively provided with the first guide port and the second guide port. The drive shaft of the drive motor is rotatably connected to the connecting cone groove, and the interior of the connecting cone groove is the air collecting groove, which is connected to the second guide port.

[0009] Furthermore, the heating structure includes a first flow guide shroud, a second flow guide shroud, and an electric heating wire. The first flow guide shroud is fixedly installed on the top inner layer of the furnace body shell, and the second flow guide shroud is installed in the air guide channel. Both the first and second flow guide shrouds are provided with flow guide grooves, and an electric heating wire is fixedly installed in the flow guide grooves. The electric heating wire and the drive motor are electrically connected to an external power supply.

[0010] Furthermore, the sealing structure includes a connecting block, a first sealing ring, a second sealing ring, an air inlet groove, and a one-way valve. The connecting block has a connecting groove inside, and the first sealing ring and the second sealing ring are respectively provided on the inner and outer sides of the connecting block. A guide ring is sealed and fixedly connected to the bottom of the connecting block. An air inlet groove is opened on the guide ring, and a one-way valve is installed on one side of the guide ring. The bottom of the inner and outer layers of the furnace shell have sealing grooves that respectively fit with the first sealing ring and the second sealing ring. The first sealing ring and the second sealing ring are hollow inside, and the hollow grooves inside the first sealing ring and the second sealing ring are connected to the connecting groove of the connecting block.

[0011] Furthermore, the locking structure includes a fixed shell, a flow guide hole, a guide rod, a locking block, a compression spring, a limiting plate, and a baffle. The fixed shell has a flow guide hole, a guide rod is installed inside the fixed shell, the guide rod is slidably connected to the locking block, and a baffle is fixedly connected to the locking block. The fixed shell has a limiting plate inside, and a compression spring is provided on one side of the limiting plate. The fixed shell is fixedly installed in the mounting holes opened around the docking block, and the outer layer of the furnace shell has a locking groove that matches the locking block.

[0012] The beneficial effects of this utility model are as follows: the nitrogen gas is driven by centrifugal fan blades to circulate in the air guide channel and is heated twice by the heating wires of the first and second guide shrouds, which significantly improves the heating speed of the nitrogen gas. At the same time, the heat-conducting inner layer and the heat-insulating outer layer are used to achieve uniform heating of the furnace body, reducing energy consumption. The sealing structure uses air pressure to expand the hollow sealing ring, and the air pressure drives the locking block of the locking structure to automatically lock, eliminating the need for manual adjustment of bolts, making the sealing more stable and improving the disassembly and assembly efficiency. The furnace body and the base are connected through the sealing groove and the locking groove, and the one-way valve can quickly release pressure and unlock, which facilitates daily maintenance and component replacement and reduces downtime. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the furnace body structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the heating structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the circulation structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the sealing structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model;

[0019] Figure 6 This is a schematic diagram of the locking structure of a bell-type multifunctional ion nitriding furnace according to an embodiment of the present utility model.

[0020] In the picture:

[0021] 1. Furnace body structure; 101. Furnace body shell; 102. Air guide channel; 103. Air inlet; 104. Exhaust port; 105. Nitrogen port; 2. Circulation structure; 201. Drive motor; 202. Centrifugal fan blade; 203. First guide port; 204. Second guide port; 205. Connecting conical groove; 206. Gas collection groove; 3. Heating structure; 301. First guide shroud; 302. Second guide shroud; 303. Heating wire; 4. Sealing structure; 401. Connecting block; 402. First sealing ring; 403. Second sealing ring; 404. Air inlet groove; 405. One-way valve; 5. Base; 6. Engaging structure; 601. Fixing shell; 602. Air guide hole; 603. Guide rod; 604. Engaging block; 605. Compression spring; 606. Limiting plate; 607. Baffle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] According to an embodiment of the present invention, a bell-type multifunctional ion nitriding furnace is provided.

[0024] Example 1;

[0025] like Figure 1-6 As shown, the bell-type multifunctional ion nitriding furnace according to an embodiment of the present invention includes a furnace body structure 1, a circulation structure 2 at the top of the furnace body structure 1, a heating structure 3 installed inside the furnace body structure 1, a sealing structure 4 at the bottom of the furnace body structure 1, a base 5 fixedly connected to the bottom of the sealing structure 4, and a locking structure 6 installed inside the sealing structure 4. The furnace body structure 1 achieves sealed locking and docking with the base 5 through the sealing structure 4 and the locking structure 6. The furnace body structure 1 achieves circulating heating of nitrogen and effective heating of the inner wall of the furnace body through the circulation structure 2 and the heating structure 3.

[0026] The furnace structure 1 includes a furnace shell 101, an air guide channel 102, an air inlet 103, an exhaust outlet 104, and a nitrogen inlet 105. The furnace shell 101 is divided into inner and outer layers, and an air guide channel 102 is formed between the inner and outer layers of the furnace shell 101. An air inlet 103 is provided at the top of the inner layer of the furnace shell 101, and an exhaust outlet 104 is provided around the bottom of the inner layer of the furnace shell 101. The inner layer of the furnace shell 101 is connected to the nitrogen inlet 105. The air guide channel 102 formed by the furnace shell 101 of the furnace structure 1 is used for nitrogen circulation heating. At the same time, the inner layer of the furnace shell 101 is made of heat-conducting material, while the outer layer of the furnace shell 101 is made of heat-insulating material. The air inlet 103 is used to install the centrifugal fan blades 202 of the circulation structure 2, which is used to guide nitrogen into the air guide channel 102 for circulation. The exhaust outlet 104 is used to circulate gas into the furnace body. The nitrogen inlet 105 is used to introduce nitrogen.

[0027] The circulation structure 2 includes a drive motor 201, a centrifugal fan blade 202, a first guide port 203, a second guide port 204, a connecting conical groove 205, and an air collecting groove 206. The drive end of the drive motor 201 is connected to the centrifugal fan blade 202. The centrifugal fan blade 202 is provided with the first guide port 203 and the second guide port 204 respectively. The drive shaft of the drive motor 201 is rotatably connected to the connecting conical groove 205. The interior of the connecting conical groove 205 is the air collecting groove 206, and the air collecting groove 206 is connected to the second guide port 204.

[0028] Heating structure 3 includes a first guide shroud 301, a second guide shroud 302, and a heating wire 303. The first guide shroud 301 is fixedly installed on the top inner layer of the furnace shell 101, and the second guide shroud 302 is installed inside the air guide channel 102. Both the first guide shroud 301 and the second guide shroud 302 have guide grooves, and the heating wire 303 is fixedly installed in the guide grooves. The heating wire 303 and the drive motor 201 are electrically connected to an external power supply. The drive motor 201 of the circulation structure 2 drives the centrifugal fan blades 202, causing the airflow inside the furnace to pass through the first guide shroud 301. The gas is introduced into the first guide port 204 through the first guide shroud 301. When the gas is introduced into the first guide port 203 through the first guide shroud 301, it will pass through the heating wire 303 for the first heating. When the gas is introduced into the exhaust port 104 through the air guide channel 102, it will pass through the heating wire 303 of the second guide shroud 302 for the second heating. The two heatings make the gas heat up faster during the circulation process. At the same time, the inner shell of the furnace body 101 of the air guide channel 102 can be effectively heated to improve the heat preservation effect and make the furnace body heat up evenly.

[0029] The sealing structure 4 includes a docking block 401, a first sealing ring 402, a second sealing ring 403, an air inlet groove 404, and a one-way valve 405. The docking block 401 has a connecting groove inside. The first sealing ring 402 and the second sealing ring 403 are respectively provided on the inner and outer sides of the docking block 401. A guide ring is sealed and fixedly connected to the bottom end of the docking block 401. An air inlet groove 404 is opened on the guide ring. A one-way valve 405 is installed on one side of the guide ring. The bottom ends of the inner and outer layers of the furnace shell 101 are provided with sealing grooves that fit with the first sealing ring 402 and the second sealing ring 403 respectively. The first sealing ring 402 and the second sealing ring 403 are hollow inside. The hollow grooves inside the first sealing ring 402 and the second sealing ring 403 are connected to the connecting groove of the docking block 401.

[0030] The engaging structure 6 includes a fixed shell 601, a guide hole 602, a guide rod 603, an engaging block 604, a compression spring 605, a limiting plate 606, and a baffle 607. The fixed shell 601 has a guide hole 602. The guide rod 603 is installed inside the fixed shell 601, and the engaging block 604 is slidably connected to the guide rod 603. The baffle 607 is fixedly connected to the engaging block 604. The limiting plate 606 is located inside the fixed shell 601, and a compression spring 605 is located on one side of the limiting plate 606. The fixed shell 601 is fixedly installed in the mounting holes around the docking block 401. The outer layer of the furnace body shell 101 has engaging grooves that match the engaging block 604. During the docking process between the furnace body shell 101 and the base 5, the sealing structure 4 and the engaging structure 6 improve the connection sealing and facilitate installation and disassembly. A one-way valve 405 can... When a gas pressure device is connected, and a sealing connection is required, the furnace shell 101 is fastened onto the base 5, and the sealing ring is initially embedded in the sealing groove. Then, the pressurizing gas pressure device connected to the one-way valve 405 pressurizes the inside of the connecting groove, allowing the sealing ring to expand further and improve the sealing effect. At the same time, since the fixed shell 601 of the locking structure 6 is connected to the connecting groove through the guide hole 602, one side of the locking block 604 will be pressed outward, causing the locking block 604 to engage with the locking groove on the outer layer of the furnace shell 101, thus completing the connection of the furnace shell 101. Conversely, when it is necessary to disassemble the furnace shell 101, the one-way valve 405 is connected to the pressure relief device to release the pressure in the connecting groove. Then, under the action of the compression spring 605, the locking block 604 will reset, unlocking the furnace shell 101 from the docking block 401, allowing for disassembly.

[0031] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0032] In summary, with the aid of the above-mentioned technical solution of this utility model, the air guide channel 102 formed by the furnace shell 101 of the furnace body structure 1 is used for nitrogen circulation heating. Meanwhile, the inner layer of the furnace shell 101 is made of heat-conducting material, and the outer layer is made of heat-insulating material. The air inlet 103 is used to install the centrifugal fan blades 202 of the circulation structure 2, which are used to guide nitrogen into the air guide channel 102 for circulation. The exhaust port 104 is used for the circulation of gas into the furnace body. The nitrogen port 105 is used to introduce nitrogen. The drive motor 201 of the circulation structure 2 drives... Centrifugal fan blades 202 guide the airflow inside the furnace body through the first guide port 203 to the second guide port 204. When the gas is introduced to the first guide port 203 via the first guide shroud 301, it passes through the heating wire 303 for initial heating. As the gas travels from the air guide channel 102 to the exhaust port 104, it passes through the heating wire 303 of the second guide shroud 302 for a second heating. This dual heating process allows the gas to heat up more quickly during circulation and effectively heats the inner shell of the furnace body 101 within the air guide channel 102. The high heat preservation effect ensures uniform heating throughout the furnace body. During the docking process between the furnace shell 101 and the base 5, the sealing structure 4 and the snap-fit ​​structure 6 improve the connection sealing and facilitate installation and disassembly. A pressure device can be connected through the one-way valve 405. When a sealing docking is required, the furnace shell 101 snaps onto the base 5, initially embedding the sealing ring into the sealing groove. Then, the pressurized air pressure device connected to the one-way valve 405 pressurizes the inside of the groove, allowing the sealing ring to expand further and improve the sealing effect. Simultaneously, due to... The fixed shell 601 of the locking structure 6 is connected to the connecting groove through the guide hole 602. This causes one side of the locking block 604 to slide outward under pressure, so that the locking block 604 engages with the locking groove on the outer layer of the furnace shell 101, completing the docking of the furnace shell 101. Conversely, when it is necessary to disassemble the furnace shell 101, the one-way valve 405 is connected to the pressure relief device to release the pressure in the connecting groove. Then, under the action of the compression spring 605, the locking block 604 will be reset, so that the furnace shell 101 is unlocked from the docking block 401, and then it can be disassembled.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bell-type multifunctional ion nitriding furnace, characterized in that, The furnace includes a furnace body structure (1), a circulation structure (2) at the top of the furnace body structure (1), a heating structure (3) inside the furnace body structure (1), a sealing structure (4) at the bottom of the furnace body structure (1), a base (5) fixedly connected to the bottom of the sealing structure (4), and a locking structure (6) installed inside the sealing structure (4). The furnace body structure (1) achieves a sealed locking connection with the base (5) through the sealing structure (4) and the locking structure (6). The furnace body structure (1) achieves circulating heating of nitrogen and effective heating of the inner wall of the furnace through the circulation structure (2) and the heating structure (3).

2. The bell-type multifunctional ion nitriding furnace according to claim 1, characterized in that, The furnace body structure (1) includes a furnace shell (101), an air guide channel (102), an air inlet (103), an exhaust port (104), and a nitrogen port (105). The furnace shell (101) is divided into inner and outer layers. An air guide channel (102) is formed between the inner and outer layers of the furnace shell (101). An air inlet (103) is provided at the top of the inner layer of the furnace shell (101). An exhaust port (104) is provided around the bottom of the inner layer of the furnace shell (101). The inner layer of the furnace shell (101) is connected to a nitrogen port (105).

3. A bell-type multifunctional ion nitriding furnace according to claim 2, characterized in that, The circulation structure (2) includes a drive motor (201), a centrifugal fan blade (202), a first guide port (203), a second guide port (204), a connecting conical groove (205), and an air collecting groove (206). The drive end of the drive motor (201) is connected to the centrifugal fan blade (202). The centrifugal fan blade (202) is provided with a first guide port (203) and a second guide port (204). The drive shaft of the drive motor (201) is rotatably connected to the connecting conical groove (205). The interior of the connecting conical groove (205) is the air collecting groove (206), and the air collecting groove (206) is connected to the second guide port (204).

4. A bell-type multifunctional ion nitriding furnace according to claim 3, characterized in that, The heating structure (3) includes a first guide shroud (301), a second guide shroud (302), and a heating wire (303). The first guide shroud (301) is fixedly installed on the top of the inner layer of the furnace shell (101), and the second guide shroud (302) is installed in the air guide channel (102).

5. A bell-type multifunctional ion nitriding furnace according to claim 4, characterized in that, Both the first guide shield (301) and the second guide shield (302) are provided with guide grooves, and heating wires (303) are fixedly installed in the guide grooves. The heating wires (303) and the drive motor (201) are electrically connected to an external power supply.

6. A bell-type multifunctional ion nitriding furnace according to claim 5, characterized in that, The sealing structure (4) includes a docking block (401), a first sealing ring (402), a second sealing ring (403), an air inlet groove (404), and a one-way valve (405). The docking block (401) has a connecting groove inside. The docking block (401) has a first sealing ring (402) and a second sealing ring (403) on its inner and outer sides respectively. The bottom end of the docking block (401) is sealed and fixedly connected to an air guide ring, and an air inlet groove (404) is opened on the air guide ring.

7. A bell-type multifunctional ion nitriding furnace according to claim 6, characterized in that, A one-way valve (405) is installed on one side of the gas guide ring, and sealing grooves that respectively match the first sealing ring (402) and the second sealing ring (403) are opened at the bottom of the inner and outer layers of the furnace shell (101).

8. A bell-type multifunctional ion nitriding furnace according to claim 7, characterized in that, The first sealing ring (402) and the second sealing ring (403) are hollow inside, and the hollow grooves inside the first sealing ring (402) and the second sealing ring (403) are connected to the connecting groove of the mating block (401).

9. A bell-type multifunctional ion nitriding furnace according to claim 8, characterized in that, The engaging structure (6) includes a fixed shell (601), a guide hole (602), a guide rod (603), an engaging block (604), a compression spring (605), a limiting plate (606), and a baffle (607). The fixed shell (601) has a guide hole (602), and the guide rod (603) is installed inside the fixed shell (601). The guide rod (603) is slidably connected to the engaging block (604), and the baffle (607) is fixedly connected to the engaging block (604).

10. A bell-type multifunctional ion nitriding furnace according to claim 9, characterized in that, Inside the fixed shell (601) is a limiting plate (606), and on one side of the limiting plate (606) is a compression spring (605). The fixed shell (601) is fixedly installed in the mounting holes opened around the docking block (401), and the outer layer of the furnace shell (101) is provided with a locking groove that matches the locking block (604).

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