Vertical vacuum furnace

Abstract

The utility model relates to the technical field of vacuum furnaces, in particular to a vertical vacuum furnace which comprises a furnace body, a material frame, a supporting component, a rotating disc and a driving device, a heating chamber is arranged in the furnace body, the material frame is arranged in the heating chamber, the rotating disc is arranged outside the heating chamber, and the material frame is connected with the rotating disc through the supporting component; the driving device is arranged outside the heating chamber and can drive the rotating disc to drive the supporting component and the material frame to rotate relative to the furnace body. In the using process of the vertical vacuum furnace, the driving device can be used for driving the rotating disc to drive the supporting component and the material frame to rotate relative to the furnace body, so that a workpiece on the material frame continuously rotates, the workpiece is heated more uniformly, the performance of the workpiece is improved, and the service life of the workpiece is prolonged. In addition, the problems that the heat preservation layer is scraped and collided due to rotation, heat dissipation of the heat preservation layer may affect dynamic sealing and the like are solved, and the performance in the aspects of vacuum, positive pressure, dynamic sealing, heat preservation, cooling and the like is well guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of vacuum furnaces, and particularly to a vertical vacuum furnace. Background Art

[0002] Currently, in the processing technology fields such as military industry, aerospace, etc., the requirement for the temperature uniformity of workpieces in the heat treatment process is getting higher and higher. However, for the currently used vertical vacuum furnaces, when working at high temperature and high vacuum, the workpieces are stationary in the vacuum furnace. Due to the deviation of furnace temperatures at different positions, it is very difficult to ensure the consistency of workpiece temperatures. Summary of the Utility Model

[0003] The purpose of this application is to provide a vertical vacuum furnace, which to a certain extent solves the technical problem in the prior art that the workpieces are stationary in the vacuum furnace, and due to the deviation of furnace temperatures at different positions, it is very difficult to ensure the consistency of workpiece temperatures.

[0004] This application provides a vertical vacuum furnace, including: a furnace body, a material rack, a support member, a rotating disk, and a driving device; wherein, a heating chamber is arranged inside the furnace body, the material rack is arranged inside the heating chamber, the rotating disk is arranged outside the heating chamber, and the material rack and the rotating disk are connected by the support member; the driving device is arranged outside the heating chamber, and the driving device can drive the rotating disk to drive the support member and the material rack to rotate relative to the furnace body.

[0005] In the above technical solution, further, the vertical vacuum furnace further includes a transmission mechanism, the transmission mechanism is arranged outside the heating chamber, and the driving device can drive the rotating disk to drive the support member and the material rack to rotate through the transmission mechanism.

[0006] In any of the above technical solutions, further, the material rack, the support member, the rotating disk, the transmission mechanism, and the driving device are sequentially arranged from top to bottom along the height direction of the furnace body.

[0007] In any of the above technical solutions, further, the transmission mechanism includes a first transmission gear and a second transmission gear; wherein, the second transmission gear, the rotating disk, the material rack, and the furnace body are coaxially arranged, and the second transmission gear is connected to the rotating disk so that the second transmission gear and the rotating disk rotate synchronously; the first transmission gear is arranged on the side of the second transmission gear and meshes with it;

[0008] The vertical vacuum furnace further includes a speed changer, which is arranged below the first transmission gear; the rotary output end of the driving device is connected to the second transmission gear via the speed changer, and the driving device can drive the second transmission gear through the speed changer to drive the first transmission gear to rotate.

[0009] In any of the above technical solutions, further, the transmission mechanism further includes a magnetic fluid sealing device, which is arranged between the speed changer and the first transmission gear and is respectively connected to both.

[0010] In any of the above technical solutions, further, the driving device is arranged outside the furnace body, and the transmission mechanism is arranged inside the furnace body.

[0011] In any of the above technical solutions, further, the diameter of the first transmission gear is smaller than that of the second transmission gear.

[0012] In any of the above technical solutions, further, the furnace body includes an upper furnace body and a lower furnace door, and the lower furnace door and the upper furnace body are detachably connected.

[0013] In any of the above technical solutions, further, the vertical vacuum furnace includes a first support seat, and the first support seat is fixed to the inner wall of the lower furnace door. Along the height direction of the furnace body, the rotary disk is arranged above the first support seat, and the rotary disk is rotationally connected to the first support seat through steel balls.

[0014] In any of the above technical solutions, further, the vertical vacuum furnace includes a second support seat, and the second support seat is fixed to the inner wall of the lower furnace door, and the common central axis of the rotary disk and the second transmission gear is fixed on the second support seat.

[0015] In any of the above technical solutions, further, the heating chamber includes a cylinder body, and a cylinder body opening is formed at the bottom of the cylinder body along its height direction; the vertical vacuum furnace further includes a heat insulation member, the heat insulation member is sleeved on the support member and is connected to the rotary disk; at least part of the structure of the heat insulation member is inserted into the cylinder body opening, and there is a gap between the side wall of the heat insulation member inserted into the cylinder body opening and the inner side wall of the cylinder body opening.

[0016] In any of the above technical solutions, further, the heat insulation member is a convex-shaped block.

[0017] In any of the above technical solutions, further, the heating chamber further includes a heat preservation layer, and the heat preservation layer is coated on the outer wall of the cylinder body.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows:

[0019] During the use of the vertical vacuum furnace provided by the present application, the driving device can be used to drive the rotating disk to drive the supporting member and the material rack to rotate relative to the furnace body. As a result, the workpieces on the material rack can be continuously rotated, making the workpieces receive heat more evenly and helping to improve the performance of the workpieces.

[0020] Moreover, the rotating disk and the material rack are coaxially installed on the second support. The second transmission gear is coaxially installed under the rotating disk. The first transmission gear on the eccentrically arranged driving mechanism meshes with the second transmission gear to drive the rotating disk to rotate, enabling the material rack carrying the workpieces to rotate around the vertical central axis.

[0021] In addition, steel balls are arranged between the periphery of the rotating disk and the second support seat of the lower furnace door to ensure the horizontal rotation of the rotating disk. A relatively thick heat insulation member, i.e., the heat insulation layer, is provided at the root of the material rack. There is a gap between the heat insulation layer wrapped outside the heating chamber and the heat insulation layer. This gap serves both as the channel for the cooling gas during cooling and prevents the deformation of the heat insulation layer wrapped outside the cylinder body as described below at high temperatures, which may cause the heat insulation member to scrape against the heat insulation layer at the bottom of the cylinder body during rotation. Moreover, the gap can reduce the radiation heat transfer and enhance the heat insulation effect.

[0022] It can be seen that when the vertical vacuum furnace provided by the present application is in use, the material rack can rotate horizontally around the vertical central axis, ensuring that the workpieces at each part receive heat evenly. Moreover, the present application also solves problems such as the scraping of the heat insulation layer caused by rotation and the possible influence of heat insulation layer heat dissipation on dynamic sealing. The performance in various aspects such as vacuum, positive pressure, dynamic sealing, heat insulation, and cooling is well guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic structural diagram of the vertical vacuum furnace provided by the embodiment of the present application;

[0025] Figure 2 is Figure 1 a partially enlarged structural diagram of

[0026] Reference numerals:

[0027] 1 - Furnace body, 101 - Upper furnace body, 102 - Lower furnace door, 103 - Heating chamber, 1031 - Cylinder body, 1032 - Thermal insulation layer, 2 - Material rack, 3 - Support member, 4 - Rotating disk, 5 - Driving device, 6 - Transmission mechanism, 61 - First transmission gear, 62 - Second transmission gear, 7 - Speed changer, 8 - Magnetic fluid sealing device, 9 - First support seat, 10 - Steel ball, 11 - Second support seat, 12 - Central shaft, 13 - Heat insulation member, 14 - Clamp, 15 - Bracket, 16 - Workpiece. Detailed implementation manners

[0028] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0029] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application.

[0030] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0033] Next, refer to Figure 1 and Figure 2 to describe the vertical vacuum furnace according to some embodiments of the present application.

[0034] See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a vertical vacuum furnace, including: a furnace body 1, a material rack 2, a support member 3, a rotating disk 4, and a driving device 5; wherein, a heating chamber 103 is arranged inside the furnace body 1, the material rack 2 is arranged inside the heating chamber 103, the rotating disk 4 is arranged outside the heating chamber 103, and the material rack 2 is connected to the rotating disk 4 through the support member 3; the driving device 5 is arranged outside the heating chamber 103, and the driving device 5 can drive the rotating disk 4 to drive the support member 3 and the material rack 2 to rotate relative to the furnace body 1.

[0035] In this embodiment, during the use of the vertical vacuum furnace provided in this embodiment, the driving device 5 can be used to drive the rotating disk 4 to drive the support member 3 and the material rack 2 to rotate relative to the furnace body 1, so that the workpiece 16 on the material rack 2 can rotate continuously, making the workpiece 16 receive heat more evenly, which helps to improve the performance of the workpiece 16.

[0036] In an embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the vertical vacuum furnace further includes a transmission mechanism 6. The transmission mechanism 6 is arranged outside the heating chamber 103, and the driving device 5 can drive the rotating disk 4 to drive the support member 3 and the material rack 2 to rotate through the transmission mechanism 6.

[0037] In this embodiment, by arranging the transmission mechanism 6, the rotation of the rotating disk 4 becomes more stable, safer and more reliable.

[0038] Of course, the driving device 5 can also be directly connected to the rotating disk 4, that is, the transmission mechanism 6 is not provided between the two, and it is specifically selected according to actual needs.

[0039] In an embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the material rack 2, the support member 3, the rotating disk 4, the transmission mechanism 6, and the driving device 5 are sequentially arranged from top to bottom along the height direction of the furnace body 1.

[0040] In this embodiment, the driving device 5 drives the rotating disk 4 to rotate in a horizontal plane around an axis in the vertical direction through the transmission mechanism 6, which is adapted to the vertical furnace body 1 and makes the workpiece 16 more stable and not easily fall off the material rack 2.

[0041] In an embodiment of the present application, preferably, as Figure 1 and Figure 2As shown, the transmission mechanism 6 includes a first transmission gear 61 and a second transmission gear 62; among them, the second transmission gear 62, the rotating disk 4, the material rack 2 and the furnace body 1 are coaxially arranged, and the second transmission gear 62 is connected to the rotating disk 4 so that the second transmission gear 62 and the rotating disk 4 rotate synchronously; the first transmission gear 61 is arranged on the side of the second transmission gear 62 and meshes with it;

[0042] The vertical vacuum furnace further includes a speed changer 7, and the speed changer 7 is arranged below the first transmission gear 61; the rotating output end of the driving device 5 is connected to the second transmission gear 62 via the speed changer 7, and the driving device 5 can drive the second transmission gear 62 to drive the first transmission gear 61 to rotate through the speed changer 7.

[0043] In this embodiment, the driving device 5 can drive the second transmission gear 62 to drive the first transmission gear 61 to rotate through the speed changer 7, which can achieve speed change adjustment. Preferably, the rotational speed is continuously adjustable between 3 and 15 RPM, and it can drive the material rack 2 to rotate in both forward and reverse directions, with a wider application range.

[0044] Furthermore, preferably, the diameter of the first transmission gear 61 is smaller than that of the second transmission gear 62. For two meshing gears, while reducing the speed, it also greatly reduces the heat transfer from the rotating disk 4 to the second transmission gear 62, avoiding overheating of the sealing part of the magnetic fluid sealing device 8 described below and affecting the sealing reliability. Of course, it is not limited to this, and the diameters of the first transmission gear 61 and the second transmission gear 62 can also be selected according to actual needs.

[0045] Furthermore, preferably, the driving device 5 is a motor, and preferably a variable frequency speed regulation motor. Of course, it is not limited to this, and it can also be an ordinary motor, which is specifically set according to actual needs.

[0046] Furthermore, preferably, the second transmission gear 62 and the rotating disk 4 are arranged opposite to each other up and down, and can be detachably connected by bolts.

[0047] In an embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the transmission mechanism 6 further includes a magnetic fluid sealing device 8, and the magnetic fluid sealing device 8 is arranged between the speed changer 7 and the first transmission gear 61 and is connected to both of them respectively.

[0048] In this embodiment, the magnetic fluid sealing device 8 is used to connect the speed changer 7 and the first transmission gear 61 together. The magnetic fluid sealing device 8 can achieve zero leakage, ensure the sealing of the system, and is safe, environmentally friendly, self-lubricating, has fast response and long service life.

[0049] Further, preferably, connecting shafts are provided at both ends of the magnetic fluid sealing device 8. One of the connecting shafts is inserted into the mounting hole on the speed changer 7, and the other is inserted into the central hole of the first transmission gear 61. Preferably, key connection can be adopted.

[0050] In an embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the furnace body 1 includes an upper furnace body 101 and a lower furnace door 102. Along the height direction of the furnace body 1, the lower furnace door 102 is arranged at the bottom of the upper furnace body 101, and the lower furnace door 102 and the upper furnace body 101 are detachably connected.

[0051] In this embodiment, the lower furnace door 102 and the upper furnace body 101 together form a vertical vacuum furnace, and the lower furnace door 102 and the upper furnace body 101 are detachably connected, which is convenient for maintaining the structure installed on the lower furnace door 102.

[0052] Further, preferably, a first convex portion is formed on the outer wall of the bottom of the upper furnace body 101, and a second convex portion is formed on the outer side wall of the lower furnace door 102; the first convex portion and the second convex portion are abutted against each other and fixed together by a clamp 14 with an installation groove inside, and for further reinforcement, bolt connection or the like can also be adopted.

[0053] Further, preferably, the first convex portion extends along the entire outer circumference of the upper furnace body 101 and is annular, the second convex portion extends along the entire outer circumference of the lower furnace door 102 and is annular, correspondingly, the clamp 14 is also annular, which improves the fixing effect on the upper furnace body 101 and the lower furnace door 102.

[0054] In an embodiment of the present application, preferably, as Figure 2 shown, the vertical vacuum furnace includes a first support seat 9, and the first support seat 9 is fixed to the inner wall of the lower furnace door 102. Along the height direction of the furnace body 1, a rotating disk 4 is arranged above the first support seat 9, and the rotating disk 4 is rotatably connected to the first support seat 9 through steel balls 10.

[0055] In this embodiment, when the rotating disk 4 rotates, it rolls on the steel balls 10, reducing friction. This structure ensures the smoothness of the rotating disk 4 during rotation, and this structure provides sufficient load-bearing capacity for the rotating disk 4.

[0056] Further, preferably, a semi-circular raceway for the steel balls 10 is formed at the top of the first support seat 9, and the aforementioned multiple sequentially arranged steel balls 10 are installed inside, ensuring the smooth rotation and sufficient load-bearing capacity of the rotating disk 4.

[0057] Further, preferably, the first support seat 9 is of an annular structure; the rotating disk 4 is a circular disk. Of course, it is not limited to this, and other structures can also be selected according to actual needs.

[0058] In one embodiment of the present application, preferably, as Figure 2 shown, the vertical vacuum furnace includes a second support base 11, and the second support base 11 is fixed to the inner wall of the lower furnace door 102, and the common central axis 12 of the rotating disk 4 and the second transmission gear 62 is fixed on the second support base 11, that is, both the rotating disk 4 and the second transmission gear 62 are rotatably sleeved on this central axis 12.

[0059] In this embodiment, the second support base 11 serves to support the common central axis 12 of the rotating disk 4 and the second transmission gear 62, and moreover, the rotating disk 4, the heat insulation member 13 described below, the material rack 2, and the driving mechanism are all connected to the lower furnace door 102, that is, an integrated body is formed. During installation, only the entire integrated body needs to be assembled as a whole. During maintenance, this integrated body can be disassembled from the furnace body 1 and then maintained, with simple and convenient operation.

[0060] In one embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the heating chamber 103 includes a cylinder body 1031, and an opening 1031 of the cylinder body 1031 is formed at the bottom along its height direction; the vertical vacuum furnace further includes a heat insulation member 13, the heat insulation member 13 is sleeved on the support member 3 and is connected to the rotating disk 4; at least part of the structure of the heat insulation member 13 is inserted into the opening 1031 of the cylinder body 1031, and there is a gap between the side wall of the heat insulation member 13 inserted into the opening 1031 of the cylinder body 1031 and the inner side wall of the opening 1031 of the cylinder body 1031.

[0061] Furthermore, preferably, as Figure 1 and Figure 2 shown, the heating chamber 103 further includes a heat preservation layer 1032, and the heat preservation layer 1032 is coated on the outer wall of the cylinder body 1031, that is, the heat preservation layer 1032 covers the entire outer wall of the cylinder body 1031, except for the aforementioned opening 1031 of the cylinder body 1031. The heat preservation layer 1032 plays a role in heat preservation, improves the heating rate of the workpiece 16, etc., and helps to reduce energy consumption.

[0062] In this embodiment, there is a gap between the side wall of the heat insulation member 13 inserted into the opening 1031 of the cylinder body 1031 and the inner side wall of the opening 1031 of the cylinder body 1031. This gap is both a channel for the cooling gas during cooling and prevents the deformation of the heat preservation layer 1032 wrapped outside the cylinder body 1031 at high temperatures, resulting in mutual scraping between the heat insulation member 13 and the heat preservation layer 1032 at the bottom of the cylinder body 1031 when the heat insulation member 13 rotates, and the gap can reduce the heat transfer and enhance the heat preservation effect.

[0063] In one embodiment of the present application, preferably, as Figure 2 shown, the heat insulation member 13 is a convex-shaped block.

[0064] In this embodiment, the heat insulation member 13 is designed as a convex-shaped block. The head with a smaller transverse dimension of it is inserted into the opening of the aforementioned cylinder 1031, and the bottom with a larger transverse dimension of it is located outside the opening of the cylinder 1031, and shields part of the structures of the rotating disk 4 and the transmission mechanism 6, reducing the heat transfer to these components.

[0065] Furthermore, preferably, the heat insulation member 13 is a convex-shaped frustum-shaped block. Of course, it is not limited thereto. The heat insulation member 13 can also be a cylindrical structure with the same thickness up and down, etc., or a non-circular structure, which is specifically selected according to actual needs.

[0066] In an embodiment of the present application, preferably, as Figure 1 shown, this vertical vacuum furnace further includes a bracket 15, and the furnace body 1 is mounted on this bracket 15.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vertical vacuum furnace, characterized in that: include: A furnace body, a material rack, a supporting member, a rotating disk and a driving device; wherein a heating chamber is arranged in the furnace body, the material rack is arranged in the heating chamber, the rotating disk is arranged outside the heating chamber, and the material rack and the rotating disk are connected through the supporting member; The driving device is arranged outside the heating chamber, and the driving device can drive the rotating disk to drive the supporting member and the material rack to rotate relative to the furnace body.

2. The vertical vacuum furnace according to claim 1, characterized in that: The vertical vacuum furnace further comprises a transmission mechanism, which is disposed outside the heating chamber, and the driving device can drive the rotating disk through the transmission mechanism to drive the supporting member and the material rack to rotate.

3. The vertical vacuum furnace according to claim 2, characterized in that: The material rack, the supporting member, the rotating disk, the transmission mechanism and the driving device are arranged in sequence from top to bottom along the height direction of the furnace body.

4. The vertical vacuum furnace according to claim 3, characterized in that: The transmission mechanism includes a first transmission gear and a second transmission gear; wherein the second transmission gear, the rotating disk, the material rack and the furnace body are coaxially arranged, and the second transmission gear is connected to the rotating disk so that the second transmission gear and the rotating disk rotate synchronously; the first transmission gear is arranged on the side of the second transmission gear and meshes with each other; The vertical vacuum furnace also includes a speed changer, which is arranged below the first transmission gear; the rotation output end of the driving device is connected to the second transmission gear via the speed changer, and the driving device can drive the second transmission gear to drive the first transmission gear to rotate through the speed changer.

5. The vertical vacuum furnace according to claim 4, characterized in that: The transmission mechanism further comprises a magnetic fluid sealing device, which is disposed between the speed changer and the first transmission gear and is respectively connected to both of them; and / or The driving device is arranged outside the furnace body, and the transmission mechanism is arranged inside the furnace body; and / or A diameter of the first transmission gear is smaller than a diameter of the second transmission gear.

6. The vertical vacuum furnace according to claim 4, characterized in that: The furnace body comprises an upper furnace body and a lower furnace door, and the lower furnace door and the upper furnace body are detachably connected.

7. The vertical vacuum furnace according to claim 6, characterized in that: The vertical vacuum furnace includes a first support seat, and the first support seat is fixed to the inner wall of the lower furnace door, and along the height direction of the furnace body, the rotating disk is arranged above the first support seat, and the rotating disk and the first support seat are rotatably connected through a steel ball.

8. The vertical vacuum furnace according to claim 6, characterized in that: The vertical vacuum furnace comprises a second support base, and the second support base is fixed to the inner wall of the lower furnace door, and the common central axis of the rotating disk and the second transmission gear is fixed on the second support base.

9. The vertical vacuum furnace according to claim 3, characterized in that: The heating chamber includes a cylinder, and a cylinder opening is formed at the bottom of the cylinder along its height direction; the vertical vacuum furnace also includes a heat insulating member, which is sleeved on the supporting member and connected to the rotating disk; at least part of the structure of the heat insulating member is inserted into the cylinder opening, and there is a gap between the side wall of the heat insulating member inserted in the cylinder opening and the inner wall of the cylinder opening.

10. The vertical vacuum furnace according to claim 9, characterized in that: The heat insulating member is a convex-shaped block; and / or The heating chamber also includes a heat-insulating layer, and the heat-insulating layer is coated on the outer wall of the cylinder.

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