Sealing structure of metal heat treatment vacuum furnace
Through the innovative design of the furnace cover assembly and gas regulating assembly, the negative pressure inside the vacuum furnace is used to expand the inflatable sealing ring, which solves the problem of O-ring hardening under high temperature and pressure, and realizes the stable sealing of the metal heat treatment vacuum furnace and the durability of the seals.
Patent Information
- Application Number
- CN202423011903.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-06
AI Technical Summary
When sealing an existing metal heat treatment vacuum furnace, the O-ring is easily hardened under high temperature and pressure, resulting in a weakened sealing effect and a shortened service life.
Adopting the innovative design of furnace cover assembly, sealing assembly and gas regulating assembly, the initial sealing is achieved by rotating the rotary plate, and the negative pressure inside the vacuum furnace is used to expand the inflatable sealing ring, ensuring the sealing effect and durability of the seal.
A stable seal is achieved in the vacuum furnace, the problem of O-ring hardening is avoided, and the sealing effect and the service life of the seal are improved.
Smart Images
Figure CN223481202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal heat treatment vacuum furnace technology, specifically a sealing structure for a metal heat treatment vacuum furnace. Background Technology
[0002] A metal heat treatment vacuum furnace is a device that heat-treats metals in a high vacuum environment. It achieves a uniform heating and cooling process without oxidation or decarburization by heating metal workpieces under vacuum conditions. The sealing structure design of the metal heat treatment vacuum furnace is crucial. It usually adopts precise sealing technology to ensure that the required high vacuum state is achieved and maintained inside the furnace.
[0003] When a metal heat treatment vacuum furnace is in use, the internal air pressure is much lower than the external air pressure. This type of furnace uses a vacuum pump to evacuate air, reducing the pressure inside the furnace to an extremely low level, thereby creating an environment with almost no gas molecules.
[0004] Existing metal heat treatment vacuum furnaces typically use O-rings installed between the furnace cover and the furnace body for sealing, achieving a seal through pressure. However, this traditional sealing method has some technical problems. O-rings are prone to hardening under prolonged high temperature and pressure, which not only reduces the elasticity and sealing effect of the ring but also shortens its service life. Therefore, a sealing structure for metal heat treatment vacuum furnaces is proposed to address these issues. Utility Model Content
[0005] The purpose of this invention is to provide a sealing structure for a metal heat treatment vacuum furnace, which solves the problem that O-rings are usually installed between the furnace cover and the furnace body and sealed by applying pressure. However, O-rings tend to harden under prolonged high temperature and pressure, which reduces the elasticity of the ring and the sealing effect.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A sealing structure for a metal heat treatment vacuum furnace includes a furnace body and an extraction device. The extraction device is fixedly connected to the left end of the furnace body, and a furnace cover assembly is rotatably connected to the left end of the furnace body. A sealing component is fixedly connected to the inner side of the furnace cover assembly, and a gas regulating component is fixedly connected to the inner side of the sealing component. The furnace cover assembly includes a rotating plate, with a cover plate fixedly connected to one side of the rotating plate. A communication opening is provided on the inner side of the cover plate, and a rubber ring is fixedly connected to one side of the cover plate. The sealing component includes a column block, with a column mounting groove and an opening on the inner side of the column block. The column has an air channel, and an air collection groove is formed on the inner side of the column. An inflation sealing ring is fixedly connected to the inner side of the air collection groove. The air regulating component includes an air storage cylinder. A first silicon carbide sealing ring is fixedly connected to a movable hole formed on the inner side of the air storage cylinder. An air outlet is formed on the inner side of the air storage cylinder. A solid guide post is slidably connected to the inner side of the movable hole formed on the air storage cylinder. A ring plate is fixedly connected to the outer side of the solid guide post. A second silicon carbide sealing ring is fixedly connected to the outer side of the ring plate. A spring is fixedly connected to the rear end of the ring plate. Limiting plates are fixedly connected to both the front end and the rear end of the solid guide post.
[0008] As a further optimization of this utility model, a column base is fixedly connected to the outer side of the left end of the vacuum furnace body, and a shaft hole is opened on the inner side of the rear end of the rotating plate. The rotating plate is rotatably connected to the column base of the vacuum furnace body through the shaft hole.
[0009] As a further optimization of this utility model, the inner side of the cover plate is hollow, the rear end of the cover plate is sleeved on the outer side of the front end of the vacuum furnace body, the inner side of the cover plate is connected to the communication port, the rear end of the rubber ring is fitted to the front end of the vacuum furnace body, and the center of the communication port and the center of the mounting groove are on the same horizontal line.
[0010] As a further optimization of this utility model, the placement groove is cylindrical in shape, the placement groove of the column block is fixedly connected to the outside of the gas storage cylinder, the placement groove penetrates the inside of the column block, and the rear end of the column block is located inside the front end of the vacuum furnace body.
[0011] As a further optimization of this utility model, the inner side of the inflatable sealing ring is hollow, the inside of the inflatable sealing ring is connected to the gas collecting groove opened in the column block, the gas collecting groove is connected to the gas channel, the gas channel is aligned with the outlet gas port, the gas channel is connected to the inner side of the outlet gas port, the outlet gas port is connected to the inner side of the gas storage cylinder, and the outer side of the inflatable sealing ring is fitted with the inner side of the front end of the vacuum furnace body.
[0012] As a further optimization of this utility model, the inner side of the gas storage cylinder is hollow, the shape of the gas storage cylinder is a hollow cylinder, and movable holes are opened at both the front and rear ends of the gas storage cylinder. The number of movable holes is the same as the number of the first silicon carbide sealing rings, and the inner side of the first silicon carbide sealing rings is in contact with the outer side of the solid guide post.
[0013] As a further optimization of this utility model, the solid guide post is cylindrical in shape, the limiting plate is fixed at the front and rear ends of the solid guide post, the ring plate is cylindrical in shape, the outer side of the second silicon carbide sealing ring is in contact with the inner side of the gas storage cylinder, and the rear end of the spring is fixedly connected to the inner side of the rear end of the gas storage cylinder.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] In this utility model, through the arrangement of the furnace cover assembly, sealing assembly, and gas regulating assembly, the metal heat treatment vacuum furnace achieves stable sealing inside the vacuum furnace while ensuring the service life of the sealing components through an innovative sealing structure design.
[0016] Specifically, the cover plate is rotated by rotating the rotating plate to achieve initial sealing. Then, during the vacuuming process, the gas-filled sealing ring expands due to the negative pressure inside the vacuum furnace, achieving efficient sealing of the inside of the vacuum furnace body. This design avoids the problem of hardening of traditional O-ring seals under high temperature and pressure, improves the sealing effect and the durability of the sealing components, and ensures the stability and reliability of the vacuum furnace during long-term operation. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This is a schematic diagram of the furnace cover assembly structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the sealing assembly structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the cover plate structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the column block structure of this utility model;
[0022] Figure 6 This is a schematic diagram of the gas storage cylinder structure of this utility model.
[0023] In the diagram: 1. Vacuum furnace body; 2. Vacuum extraction device;
[0024] 3. Furnace cover assembly; 31. Rotating plate; 32. Cover plate; 33. Connecting port; 34. Rubber ring;
[0025] 4. Sealing assembly; 41. Column block; 42. Column mounting groove; 43. Air passage; 44. Air collection groove; 45. Inflatable sealing ring;
[0026] 5. Gas regulating assembly; 51. Gas storage tank; 52. Movable hole; 53. First silicon carbide sealing ring; 54. Outlet gas port; 55. Solid guide post; 56. Ring plate; 57. Second silicon carbide sealing ring; 58. Spring; 59. Limiting plate. Detailed Implementation
[0027] 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.
[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0029] Please see Figure 1-6 This utility model provides a technical solution:
[0030] A sealing structure for a metal heat treatment vacuum furnace includes a vacuum furnace body 1 and an extraction device 2. The extraction device 2 is fixedly connected to the left end of the vacuum furnace body 1, and a furnace cover assembly 3 is rotatably connected to the left end of the vacuum furnace body 1. A sealing assembly 4 is fixedly connected to the inner side of the furnace cover assembly 3, and a gas regulating assembly 5 is fixedly connected to the inner side of the sealing assembly 4. The furnace cover assembly 3 includes a rotating plate 31, a cover plate 32 is fixedly connected to one side of the rotating plate 31, a communication port 33 is opened on the inner side of the cover plate 32, and a rubber ring 34 is fixedly connected to one side of the cover plate 32. The sealing assembly 4 includes a column block 41, a column groove 42 is opened on the inner side of the column block 41, and an air passage 43 is opened on the inner side of the column block 41. A gas collecting groove 44 is provided on the inner side of block 41. An inflation sealing ring 45 is fixedly connected to the inner side of the gas collecting groove 44 provided on block 41. The gas regulating component 5 includes a gas storage cylinder 51. A first silicon carbide sealing ring 53 is fixedly connected to the movable hole 52 provided on the inner side of the gas storage cylinder 51. An outlet 54 is provided on the inner side of the gas storage cylinder 51. A solid guide post 55 is slidably connected to the inner side of the movable hole 52 provided on the gas storage cylinder 51. A ring plate 56 is fixedly connected to the outer side of the solid guide post 55. A second silicon carbide sealing ring 57 is fixedly connected to the outer side of the ring plate 56. A spring 58 is fixedly connected to the rear end of the ring plate 56. Limiting plates 59 are fixedly connected to both the front end and the rear end of the solid guide post 55.
[0031] As a further implementation of this solution, a column base is fixedly connected to the outer side of the left end of the vacuum furnace body 1, and a shaft hole is opened on the inner side of the rear end of the rotating plate 31. The rotating plate 31 is rotatably connected to the column base of the vacuum furnace body 1 through the shaft hole. This design allows the rotating plate 31 to be rotatably connected to the column base through the shaft hole, thereby achieving the initial sealing of the vacuum furnace and laying the groundwork for the subsequent sealing.
[0032] As a further implementation of this solution, the inner side of the cover plate 32 is hollow, and the rear end of the cover plate 32 is fitted onto the outer side of the front end of the vacuum furnace body 1. The inner side of the cover plate 32 is connected to the connecting port 33, and the rear end of the rubber ring 34 is fitted to the front end of the vacuum furnace body 1. The center of the connecting port 33 and the center of the mounting groove 42 are on the same horizontal line. This structural design allows the cover plate 32 to fit against the outer side of the front end of the vacuum furnace body 1, and through the connection between the connecting port 33 and the mounting groove 42, the vacuum furnace is initially sealed, while ensuring the uniformity and stability of the sealing structure.
[0033] As a further implementation of this scheme, the groove 42 is cylindrical in shape. The groove 42 on the column block 41 is fixedly connected to the outside of the gas storage cylinder 51. The groove 42 penetrates the inside of the column block 41. The rear end of the column block 41 is located inside the front end of the vacuum furnace body 1. The inner side of the gas sealing ring 45 is hollow. The inside of the gas sealing ring 45 is connected to the gas collecting groove 44 on the column block 41. The gas collecting groove 44 is connected to the gas channel 43. The gas channel 43 is aligned with the outlet gas port 54. The gas channel 43 is connected to the inside of the outlet gas port 54. The outlet gas port 54 is connected to the inside of the gas storage cylinder 51. The outer side of the gas sealing ring 45 is fitted to the inside of the front end of the vacuum furnace body 1. This design allows the gas sealing ring 45 to expand and deform under negative pressure, fitting to the inside of the front end of the vacuum furnace body 1, achieving efficient sealing. At the same time, the connectivity ensures smooth airflow, which helps to achieve efficient vacuuming inside the vacuum furnace.
[0034] As a further implementation of this solution, the inner side of the air storage cylinder 51 is hollow, and the shape of the air storage cylinder 51 is a hollow cylinder. Movable holes 52 are opened at both the front and rear ends of the air storage cylinder 51. The number of movable holes 52 is the same as the number of the first silicon carbide sealing rings 53. The inner side of the first silicon carbide sealing ring 53 is in contact with the outer side of the solid guide post 55. The solid guide post 55 is cylindrical. The limiting piece 59 is fixed to the front and rear ends of the solid guide post 55. The ring plate 56 is cylindrical. The outer side of the second silicon carbide sealing ring 57 is in contact with the inner side of the air storage cylinder 51. The rear end of the spring 58 is fixedly connected to the inner side of the rear end of the air storage cylinder 51. This design allows the solid guide post 55 to drive the ring plate 56 and the limiting piece 59 to move under negative pressure, thereby achieving the effect of inflating the inside of the inflatable sealing ring 45 and preventing gas leakage inside the air storage cylinder 51, thus achieving an automatic and effective sealing effect.
[0035] Workflow: To achieve a stable seal inside the vacuum furnace and ensure the service life of the seals, first rotate the rotating plate 31. The rotating plate 31 drives the cover plate 32 to rotate. When the rear end of the cover plate 32 is in contact with the outer front end of the vacuum furnace body 1, the handle is fixed. At this time, the rear end of the rubber ring 34 is in contact with the front end of the vacuum furnace body 1, completing the initial seal of the vacuum furnace. At this time, the rubber ring 34 undergoes slight deformation and is not subjected to strong compression. At this time, the air pressure inside the vacuum furnace body 1 is the same as the external air pressure. Then, the evacuation device is started. 2. Vacuuming is performed inside the vacuum furnace body 1. During the vacuuming process, a large negative pressure is generated inside the vacuum furnace body 1. At this time, the solid guide column 55 will move to the rear end. The solid guide column 55 drives the ring plate 56 and the limiting plate 59 to move. At this time, the ring plate 56 slides on the inner side of the gas storage cylinder 51. The second silicon carbide sealing ring 57 plays a role in sealing between the ring plate 56 and the gas storage cylinder 51. The ring plate 56 compresses the spring 58, and the spring 58 undergoes elastic deformation. Under normal conditions, under the elastic force of the spring 58, the front of the limiting plate 59 at the rear end moves forward. The solid guide post 55 is attached to the rear side of the gas cylinder 51. The limiting piece 59 at the front end limits the movement distance of the solid guide post 55. The solid guide post 55 slides inside the movable hole 52 in the gas cylinder 51. The first silicon carbide sealing ring 53 seals the gas cylinder 51 and the solid guide post 55. The solid guide post 55 drives the limiting piece 59 at the front end to move backward. After the rear side of the limiting piece 59 is attached to the front side of the gas cylinder 51, the ring plate 56 is at the front end of the outlet 54. At the same time, the ring plate 56 moves backward. During movement, the ring plate 56 transports the air inside the air storage cylinder 51 from the outlet air port 54 to the air channel 43, and from the air channel 43 to the air collection groove 44 and the air-filled sealing ring 45. As a result, the air-filled sealing ring 45 expands and deforms, protruding from the outside of the column block 41. At the same time, the outside of the air-filled sealing ring 45 is tightly attached to the inside of the front end of the vacuum furnace body 1, thus effectively sealing the inside of the vacuum furnace body 1. This prevents the two hardware clamps from causing the seal to fail, ensuring the service life of the seal and reducing its impact.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealing structure for a metal heat treatment vacuum furnace, comprising a vacuum furnace body (1) and a vacuum pumping device (2), characterized in that: A vacuum furnace body (1) is fixedly connected to a vacuum pump (2) at its left end. A furnace cover assembly (3) is rotatably connected to the left end of the vacuum furnace body (1). A sealing assembly (4) is fixedly connected to the inner side of the furnace cover assembly (3). A gas regulating assembly (5) is fixedly connected to the inner side of the sealing assembly (4). The furnace cover assembly (3) includes a rotating plate (31). A cover plate (32) is fixedly connected to one side of the rotating plate (31). A communication port (33) is opened on the inner side of the cover plate (32). A rubber ring (34) is fixedly connected to one side of the cover plate (32). The sealing assembly (4) includes a column block (41). A column groove (42) is opened on the inner side of the column block (41). An air passage (43) is opened on the inner side of the column block (41). A gas collecting groove is opened on the inner side of the column block (41). (44), an air-filled sealing ring (45) is fixedly connected to the inner side of the gas collection groove (44) opened in the column block (41), the gas regulating component (5) includes a gas storage cylinder (51), a first silicon carbide sealing ring (53) is fixedly connected to the movable hole (52) opened in the inner side of the gas storage cylinder (51), an outlet gas port (54) is opened in the inner side of the gas storage cylinder (51), a solid guide post (55) is slidably connected to the inner side of the movable hole (52) opened in the gas storage cylinder (51), a ring plate (56) is fixedly connected to the outer side of the solid guide post (55), a second silicon carbide sealing ring (57) is fixedly connected to the outer side of the ring plate (56), a spring (58) is fixedly connected to the rear end of the ring plate (56), and a limit plate (59) is fixedly connected to both the front end and the rear end of the solid guide post (55).
2. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: A column base is fixedly connected to the outer side of the left end of the vacuum furnace body (1), and a shaft hole is opened on the inner side of the rear end of the rotating plate (31). The rotating plate (31) is rotatably connected to the column base of the vacuum furnace body (1) through the shaft hole.
3. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: The inner side of the cover plate (32) is hollow. The rear end of the cover plate (32) is fitted on the outer side of the front end of the vacuum furnace body (1). The inner side of the cover plate (32) is connected to the connecting port (33). The rear end of the rubber ring (34) is attached to the front end of the vacuum furnace body (1). The center of the connecting port (33) and the center of the mounting groove (42) are on the same horizontal line.
4. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: The placement groove (42) is cylindrical in shape. The placement groove (42) of the column block (41) is fixedly connected to the outside of the gas storage cylinder (51). The placement groove (42) penetrates the inside of the column block (41). The rear end of the column block (41) is located inside the front end of the vacuum furnace body (1).
5. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: The inner side of the inflatable sealing ring (45) is hollow. The inside of the inflatable sealing ring (45) is connected to the gas collecting groove (44) opened in the column block (41). The gas collecting groove (44) is connected to the gas channel (43). The gas channel (43) is aligned with the outlet gas port (54). The gas channel (43) is connected to the inner side of the outlet gas port (54). The outlet gas port (54) is connected to the inner side of the gas storage cylinder (51). The outer side of the inflatable sealing ring (45) is attached to the inner side of the front end of the vacuum furnace body (1).
6. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: The inner side of the gas storage cylinder (51) is hollow, and the shape of the gas storage cylinder (51) is a hollow cylinder. Movable holes (52) are opened at both the front and rear ends of the gas storage cylinder (51). The number of movable holes (52) is the same as the number of first silicon carbide sealing rings (53). The inner side of the first silicon carbide sealing ring (53) is in contact with the outer side of the solid guide post (55).
7. The sealing structure of a metal heat treatment vacuum furnace according to claim 1, characterized in that: The solid guide post (55) is cylindrical in shape. The limiting piece (59) is fixed at the front and rear ends of the solid guide post (55). The ring plate (56) is cylindrical in shape. The outer side of the second silicon carbide sealing ring (57) is in contact with the inner side of the gas storage cylinder (51). The rear end of the spring (58) is fixedly connected to the inner side of the rear end of the gas storage cylinder (51).