Annular internal heating vacuum furnace

Abstract

The utility model relates to an annular internal heating vacuum furnace, and belongs to the technical field of vacuum furnaces, the annular internal heating vacuum furnace comprises a furnace bottom and a furnace shell buckled on the furnace bottom, an annular groove allowing the bottom of the furnace shell to be embedded is formed in the top of the furnace bottom, and a locking device used for pre-tightening the furnace shell and the furnace bottom is arranged on the furnace bottom. The locking device comprises an extrusion plate installed on the surface of the furnace bottom in a sliding mode and a traction piece for pulling the extrusion plate, and the extrusion plate is integrally in an L shape and faces the annular groove. According to the annular internal heating vacuum furnace, the lower portion of the furnace shell is connected through a connecting ring and a sealing ring, meanwhile, the connecting ring is in a hollow circular truncated cone shape, the outer side of the connecting ring is an inclined face, an extrusion plate is arranged to slide towards the annular groove part to extrude the connecting ring, and when the extrusion plate gets close gradually, the sealing ring is extruded; the extrusion acting force of the connecting ring towards the interior of the annular groove can be increased, the contact tightness of the sealing ring is improved, and vacuumizing in the furnace shell is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum furnaces, and in particular to an annular internally heated vacuum furnace. Background Art

[0002] A vacuum furnace is a device used for high-temperature processing in a vacuum environment. It typically consists of a furnace, vacuum system, heating system, and control system. By excluding oxygen and other gases, a vacuum furnace creates a low-pressure or vacuum environment, preventing oxidation or other chemical reactions at high temperatures.

[0003] After searching the utility model with announcement number CN215909670U, a ring-shaped internal heating vacuum furnace is found, which includes a furnace shell, an insulation layer, refractory pillars, and a furnace bottom. The refractory pillars are arranged on the furnace bottom, and a heating body is wrapped around the refractory pillars. The refractory pillars are outer-circuited with a material box bracket, and a material box is arranged on the material box bracket. The insulation layer and the furnace shell are covered on the material box bracket and sealed with the furnace bottom. An inert gas hole is provided at the bottom of the furnace bottom, and a vacuum pipe port and a vacuum pressure gauge are provided at the corresponding tops of the furnace shell and the insulation layer.

[0004] The above patent application proposes an annular vacuum furnace, whose furnace shell adopts a detachable structure relative to the furnace bottom to facilitate the natural cooling of the material in the furnace bottom. The above application adopts the method of adding grooves and sealing strips to the furnace shell and furnace bottom of the vacuum furnace for sealing. However, in actual application, this structure does not have a corresponding locking structure, so that during the vacuuming process, manual auxiliary pressure is required to maintain the compression of the sealing strip. In response to the above problems, an annular internal heating vacuum furnace is proposed to solve the above problems. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the present application provides an annular internal heating vacuum furnace, which has the advantages of a furnace shell with a locking structure, thereby improving the safety of vacuuming.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solution: an annular internally heated vacuum furnace, comprising a furnace bottom and a furnace shell engaged with the furnace bottom, wherein the top of the furnace bottom is provided with an annular groove for the bottom of the furnace shell to be inserted into, and the furnace bottom is provided with a locking device for pre-tightening the furnace shell and the furnace bottom;

[0007] The locking device includes an extrusion plate slidably mounted on the surface of the furnace bottom and a traction member for pulling the extrusion plate. The extrusion plate is L-shaped as a whole and faces the annular groove in the circular shape. A connecting ring is fixedly mounted on the lower end of the furnace shell, and a sealing ring is fixedly connected to the lower end of the connecting ring.

[0008] Furthermore, a slider is fixedly installed on the bottom of the extrusion plate, and a guide groove for the slider to slide is provided on the top of the furnace bottom, and the guide groove also limits the slider from falling out of the guide groove.

[0009] Furthermore, the connecting ring is hollow in a truncated cone shape, and the bottom of the connecting ring has a groove for the sealing ring to be embedded in and connected.

[0010] Furthermore, the traction member includes a threaded rod rotatably mounted at the periphery of the furnace bottom, a connecting seat threadedly connected to the threaded rod, and a push rod rotatably mounted between the connecting seat and the outer side wall of the extrusion plate.

[0011] Furthermore, a transmission wheel is fixedly installed on the bottom of the threaded rod, and a driving wheel that is tooth-engaged with the transmission wheel is rotatably installed on the bottom of the furnace bottom.

[0012] Furthermore, the number of the extrusion plates and the threaded rods is multiple, and the multiple extrusion plates and the threaded rods are arranged in a ring shape on the furnace bottom.

[0013] Furthermore, an electric motor is fixedly mounted on the outer surface of the furnace bottom, and a driving wheel that is tooth-engaged with the driving wheel is fixedly mounted on the power end of the electric motor.

[0014] Furthermore, a support column is provided on the top of the furnace bottom.

[0015] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0016] The annular internal heating vacuum furnace is connected by a connecting ring and a sealing ring arranged below the furnace shell. At the same time, the connecting ring is arranged to be hollow and truncated so that the outer side of the connecting ring is inclined. An extrusion plate is arranged to slide and extrude the connecting ring toward the annular groove. As the extrusion plate gradually approaches, the extrusion force of the connecting ring toward the annular groove can be increased, thereby improving the contact tightness of the sealing ring and facilitating vacuuming of the furnace shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of this application;

[0018] Figure 2 This is a top view of the structure of the furnace bottom of this application;

[0019] Figure 3 This is a structural stereogram of the connecting ring of this application.

[0020] In the figure: 1. furnace bottom; 2. furnace shell; 3. support; 4. annular groove; 5. connecting ring; 6. sealing ring; 7. extrusion plate; 8. slider; 9. guide groove; 10. threaded rod; 11. connecting seat; 12. push rod; 13. transmission wheel; 14. driving wheel; 15. motor; 16. driving wheel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] See also Figure 1-3 In this embodiment, an annular internal heating vacuum furnace includes a furnace bottom 1 and a furnace shell 2 buckled on the furnace bottom 1. An insulation layer is added inside the furnace shell 2 to maintain the temperature inside the annular internal heating vacuum furnace. An annular groove 4 is provided on the top of the furnace bottom 1 for the bottom of the furnace shell 2 to be embedded. A locking device is provided on the furnace bottom 1 for pre-tightening the furnace shell 2 and the furnace bottom 1.

[0023] The top of the furnace bottom 1 is provided with a support column 3, and the support column 3 is a conventional refractory column.

[0024] In this embodiment, the locking device includes an extrusion plate 7 slidably mounted on the surface of the furnace bottom 1 and a pulling member for pulling the extrusion plate 7 , wherein the extrusion plate 7 is L-shaped as a whole and faces the annular groove 4 in the circular shape.

[0025] Preferably, a slider 8 is fixedly mounted on the bottom of the extrusion plate 7 , and a guide groove 9 for the slider 8 to slide is provided on the top of the furnace bottom 1 , and the guide groove 9 also limits the slider 8 from falling out of the guide groove 9 .

[0026] This design enables the extrusion plate 7 to slide against the surface of the furnace bottom 1 , thereby extruding and pre-tightening the lower portion of the furnace shell 2 embedded in the annular groove 4 .

[0027] It should be noted that a connecting ring 5 is fixedly mounted on the lower end of the furnace shell 2 , and a sealing ring 6 is fixedly connected to the lower end of the connecting ring 5 .

[0028] It is supplemented that the connecting ring 5 is hollow in a truncated cone shape, and the bottom of the connecting ring 5 has a groove for the sealing ring 6 to be embedded and connected, thereby improving the tightness of the connection between the sealing ring 6 and the connecting ring 5.

[0029] In this embodiment, the traction member includes a threaded rod 10 rotatably mounted on the periphery of the furnace bottom 1 , a connecting seat 11 threadedly connected to the threaded rod 10 , and a push rod 12 rotatably mounted between the connecting seat 11 and the outer wall of the extrusion plate 7 .

[0030] In a specific implementation, the position of the connecting seat 11 outside the threaded rod 10 can be adjusted by rotating the threaded rod 10, so that the push rod 12 is deflected to squeeze and push the extrusion plate 7 to move.

[0031] In this embodiment, a transmission wheel 13 is fixedly installed at the bottom of the threaded rod 10, and a driving wheel 14 that is tooth-engaged with the transmission wheel 13 is rotatably installed at the bottom of the furnace bottom 1. The driving wheel 14 can drive the transmission wheel 13 to rotate by rotating.

[0032] It should be noted that there are multiple extrusion plates 7 and multiple threaded rods 10 , which are arranged in a ring shape on the furnace bottom 1 .

[0033] This ensures that the external extrusion force on the connecting ring 5 is evenly distributed.

[0034] In order to pull the driving wheel 14 to rotate, in this embodiment, an electric motor 15 is fixedly mounted on the outer surface of the furnace bottom 1 , and a driving wheel 16 that is tooth-engaged with the driving wheel 14 is fixedly mounted on the power end of the electric motor 15 .

[0035] In a specific implementation, the motor 15 drives the driving wheel 16 to rotate, so that the driving wheel 16 drives the driving wheel 14 to rotate.

[0036] The working principle of the above embodiment is:

[0037] The material is placed on the outside of the support 3 above the furnace bottom 1 through the mounting frame, and then the furnace shell 2 is buckled on the top of the furnace bottom 1. The connecting ring 5 and the sealing ring 6 at the lower end of the furnace shell 2 are embedded in the annular groove 4 opened on the top of the furnace bottom 1. The motor 15 is controlled, and the motor 15 drives the driving wheel 16 connected to the power end of the motor 15 to rotate. The driving wheel 16 drives the driving wheel 14 located below the furnace bottom 1 to rotate through tooth meshing under the rotation. The driving wheel 14 rotates by meshing with multiple transmission wheels 13 at the same time, and the transmission wheel 13 drives The fixedly connected threaded rod 10 rotates, and the threaded rod 10 rotates relative to the connecting seat 11 under the rotation. The threaded fitting connection between the threaded rod 10 and the connecting seat 11 causes the angle of the push rod 12 connected between the connecting seat 11 and the extrusion plate 7 to change, so that the extrusion plate 7 is pushed toward the top of the annular groove 4. The extrusion plate 7 and the inclined part of the side of the connecting ring 5 contact each other, so that the connecting ring 5 is subjected to an extrusion force toward the inside of the annular groove 4, so that the contact tightness between the sealing ring 6 and the inner wall of the annular groove 4 is improved, thereby improving the airtightness of the furnace shell 2.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0039] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An annular internal heating vacuum furnace, comprising a furnace bottom (1) and a furnace shell (2) buckled on the furnace bottom (1), characterized in that: The top of the furnace bottom (1) is provided with an annular groove (4) for the bottom of the furnace shell (2) to be embedded, and the furnace bottom (1) is provided with a locking device for pre-tightening the furnace shell (2) and the furnace bottom (1); The locking device comprises an extrusion plate (7) slidably mounted on the surface of the furnace bottom (1) and a traction member for traction of the extrusion plate (7); the extrusion plate (7) is L-shaped as a whole and faces the annular groove (4) in the shape of an annular ring; a connecting ring (5) is fixedly mounted on the lower end of the furnace shell (2); and a sealing ring (6) is fixedly connected to the lower end of the connecting ring (5).

2. The annular internal heating vacuum furnace according to claim 1, characterized in that: A slider (8) is fixedly mounted on the bottom of the extrusion plate (7), and a guide groove (9) for the slider (8) to slide is also provided on the top of the furnace bottom (1), and the guide groove (9) also limits the slider (8) from falling out of the guide groove (9).

3. The annular internal heating vacuum furnace according to claim 1, characterized in that: The connecting ring (5) is hollow and truncated cone-shaped, and the bottom of the connecting ring (5) has a groove for the sealing ring (6) to be embedded and connected.

4. The annular internal heating vacuum furnace according to claim 1, characterized in that: The traction member comprises a threaded rod (10) rotatably mounted on the periphery of the furnace bottom (1), a connecting seat (11) threadedly connected to the threaded rod (10), and a push rod (12) rotatably mounted between the connecting seat (11) and the outer side wall of the extrusion plate (7).

5. The annular internal heating vacuum furnace according to claim 4, characterized in that: A transmission wheel (13) is fixedly mounted on the bottom of the threaded rod (10), and a driving wheel (14) which is tooth-engaged with the transmission wheel (13) is rotatably mounted on the bottom of the furnace bottom (1).

6. The annular internal heating vacuum furnace according to claim 5, characterized in that: The number of the extrusion plates (7) and the number of the threaded rods (10) are both multiple, and the multiple extrusion plates (7) and the threaded rods (10) are arranged in a ring shape on the furnace bottom (1).

7. The annular internal heating vacuum furnace according to claim 5, characterized in that: An electric motor (15) is fixedly mounted on the outer surface of the furnace bottom (1), and a driving wheel (16) which is tooth-engaged with the driving wheel (14) is fixedly mounted on the power end of the electric motor (15).

8. The annular internal heating vacuum furnace according to claim 1, characterized in that: A support column (3) is provided on the top of the furnace bottom (1).

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