Continuous vacuum sintering furnace

Abstract

The utility model relates to the technical field of graphite product processing, and discloses a continuous vacuum sintering furnace which comprises a sintering furnace body, the sintering furnace body is provided with a heating mechanism, a bearing mechanism is arranged in the sintering furnace body, the sintering furnace body comprises a heat preservation and insulation shell, and a heat conduction inner container is coaxially arranged in the heat preservation and insulation shell. A first open slot is formed in the top end of the heat-conducting liner; a second open slot matched with the first open slot is formed in the top end of the heat-insulating shell. By optimizing the structural design of the hearth and reasonably arranging the heating elements, heat distribution is more uniform, namely, the annular multi-heating-pipe structural design is adopted, partition heating can be carried out through one or more heating pipes, namely independent heating areas are arranged at different positions of the hearth, and through an accurate temperature control algorithm of the temperature controller, the heating efficiency of the hearth is improved. And each heating area is independently adjusted, so that the uniformity of the temperature in the whole hearth is realized, and materials can be uniformly heated in the hearth.

Description

Continuous vacuum sintering furnace Technical Field

[0001] This utility model relates to the field of graphite product processing technology, specifically to a continuous vacuum sintering furnace. Background Technology

[0002] A continuous vacuum sintering furnace for graphite production is a specialized piece of equipment used for sintering graphite materials. It plays a vital role in the production of graphite products, meeting the high-temperature conditions required for graphite sintering, typically reaching over 2000℃ or even higher. This allows impurities in the graphite material to volatilize, improving its purity and crystallinity. By maintaining a high vacuum, it effectively prevents graphite from being oxidized at high temperatures. Simultaneously, it facilitates the removal of gases and impurities from the graphite material, improving its density and properties.

[0003] The following problems still exist in the use of existing continuous vacuum sintering furnaces: Although continuous vacuum sintering furnaces are usually equipped with temperature control systems, due to factors such as furnace structure and heating element arrangement, the temperature at different locations in the furnace may vary, resulting in uneven sintering of materials and affecting product quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a continuous vacuum sintering furnace, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a continuous vacuum sintering furnace, comprising a sintering furnace body, wherein the sintering furnace body is equipped with a heating mechanism, and the sintering furnace body has a built-in support mechanism. The sintering furnace body includes a heat-insulating shell, and a heat-conducting inner liner is coaxially arranged inside the heat-insulating shell. A first opening groove is opened at the top of the heat-conducting inner liner, and a second opening groove matching the first opening groove is opened at the top of the heat-insulating shell. Multiple mounting grooves are opened at one end of the heat-insulating shell and at an arc-shaped angle outside the heat-conducting inner liner. The heating mechanism includes heating tubes fixedly installed in the multiple mounting grooves, and the same temperature controller is installed at one end of the multiple heating tubes.

[0008] As a further embodiment of this utility model: a sealing door is rotatably installed on the top of the heat insulation shell and on both sides of the opening of the second opening groove; a slag collection port is provided below the other end of the heat-conducting inner liner; and a slag collection door is rotatably installed on the other end of the heat insulation shell and at the opening of the slag collection port.

[0009] As a further embodiment of this utility model: the supporting mechanism includes a heating tray that is horizontally fixedly connected to the lower side wall of the heat-conducting inner liner, and the bottom wall of the heating tray has multiple slag leakage ports arranged in a rectangular array. The supporting mechanism also includes a waste slag collection tray that is horizontally fixedly connected to the lower side wall of the heat-conducting inner liner, and the waste slag collection tray is located below the heating tray.

[0010] As a further embodiment of this utility model: the bottom end of the heat insulation shell is symmetrically and fixedly connected to two supports; a ventilation groove is opened above one end of the heat-conducting inner liner; a second independent air damper is fixedly installed at the ventilation groove; a through groove is opened between the two side walls of the slag collection door; a first independent air damper is fixedly installed at the through groove; a locking block is rotatably installed at the front end of the slag collection door; and a lock seat matching the locking block is fixedly connected to the front side of the other end of the heat insulation shell.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, by optimizing the structural design of the furnace and rationally arranging the heating elements, the heat distribution is made more uniform. That is, a ring-shaped multi-heating tube structure design is adopted, which can be used to heat the furnace in sections by one or more heating tubes. That is, independent heating zones are set at different positions in the furnace, and each heating zone is individually adjusted by the precise temperature control algorithm of the temperature controller to achieve the uniformity of temperature in the entire furnace, so that the material can be heated evenly in the furnace.

[0013] 2. In this utility model, by adopting a convenient loading and unloading structure design, a double-opening sealing door is provided at the top. The two sealing doors can be quickly combined and sealed and separated in opposite directions. Materials can be conveniently placed and taken out of the heating tray through the upper opening slot. At the same time, a matching waste slag collection tray is provided below the tray. The corresponding waste slag collection tray is designed with an independent slag collection door, which facilitates the convenient collection of waste slag. Attached Figure Description

[0014] Figure 1 is an overall perspective view of this utility model;

[0015] Figure 2 is a three-dimensional view of the sintering furnace body of this utility model;

[0016] Figure 3 is a two-dimensional view of the main body of the sintering furnace of this utility model;

[0017] Figure 4 is a schematic diagram of the heating mechanism and the supporting mechanism of this utility model.

[0018] In the diagram: 1. Sintering furnace body; 2. Heating mechanism; 3. Supporting mechanism; 11. Insulation shell; 12. Heat-conducting inner liner; 13. First opening slot; 14. Second opening slot; 15. Sealing door; 16. Slag collection port; 17. Slag collection door; 18. First independent air damper; 19. Ventilation slot; 110. Second independent air damper; 111. Support; 112. Mounting slot; 21. Temperature controller; 22. Heating tube; 31. Heating tray; 32. Slag leakage port; 33. Waste slag collection tray. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please refer to Figures 1-4. In this embodiment of the present invention, the continuous vacuum sintering furnace includes a sintering furnace body 1, a heating mechanism 2, and a support mechanism 3. The sintering furnace body 1 includes a heat-insulating shell 11, a heat-conducting inner liner 12 coaxially arranged inside the heat-insulating shell 11, a first opening groove 13 at the top of the heat-conducting inner liner 12, a second opening groove 14 matching the first opening groove 13 at the top of the heat-insulating shell 11, and multiple mounting grooves 112 arc-shaped at equal angles at one end of the heat-insulating shell 11 and outside the heat-conducting inner liner 12. The heating mechanism 2 includes multiple heating tubes 22 fixedly installed in mounting slots 112. One end of each heating tube 22 is equipped with the same temperature controller 21. The overall structure design of the furnace is optimized, and the heating elements are arranged in a reasonable manner to make the heat distribution more uniform. That is, a ring-shaped multi-heating tube 22 structure design is adopted, which can be used to heat in zones by one or more heating tubes 22. That is, independent heating zones are set in different positions in the furnace, and each heating zone is individually adjusted by the precise temperature control algorithm of the temperature controller 21 to achieve the uniformity of temperature in the entire furnace, so that the material can be heated evenly in the furnace.

[0023] A sealing door 15 is rotatably installed on both sides of the opening of the second opening slot 14 at the top of the heat insulation shell 11. A slag collection port 16 is provided at the lower end of the other end of the heat-conducting inner liner 12. A slag collection door 17 is rotatably installed at the other end of the heat insulation shell 11 at the opening of the slag collection port 16. The whole structure adopts a convenient loading and unloading structure design. The top has a double sealing door 15. The two sealing doors 15 can be quickly combined and sealed and separated. Materials can be conveniently placed and removed from the heating tray 31 through the upper opening slot. At the same time, a matching waste slag collection tray 33 is provided below the tray. The corresponding waste slag collection tray 33 is designed with an independent slag collection door 17, which is convenient for the collection of waste slag.

[0024] The supporting mechanism 3 includes a heating tray 31 horizontally fixedly connected to the lower side wall of the heat-conducting inner liner 12. The bottom wall of the heating tray 31 has multiple slag leakage ports 32 arranged in a rectangular array. The supporting mechanism 3 also includes a waste slag collection tray 33 horizontally fixedly connected to the lower side wall of the heat-conducting inner liner 12. The waste slag collection tray 33 is located below the heating tray 31. The graphite billet is preheated through the heating tray 31. The billet is slowly heated to remove surface moisture and volatiles, preparing for subsequent high-temperature sintering. The preheated graphite billet is then sintered at high temperature. Under the combined action of high vacuum and high temperature, the graphite crystal structure gradually improves, impurities are further eliminated, and the performance of graphite is significantly improved. The sintered graphite products enter the cooling process and are rapidly cooled by air cooling to prevent the graphite from changing its performance due to prolonged exposure to high temperature. The cooled graphite products are continuously removed from the upper opening slot, completing the entire production process.

[0025] The bottom of the heat insulation shell 11 is symmetrically connected to two supports 111, which can be used to place the entire furnace body. A ventilation groove 19 is opened above one end of the heat-conducting inner liner 12. A second independent air damper 110 is fixedly installed at the ventilation groove 19. A through groove is opened between the two side walls of the slag collection door 17, and a first independent air damper 18 is fixedly installed at the through groove. The two independent air dampers can be used in conjunction with a vacuum pump to perform vacuuming inside the furnace. A locking block is rotatably installed at the front end of the slag collection door 17. A lock seat matching the locking block is fixedly connected to the front side of the other end of the heat insulation shell 11. The locking block can be rotated to lock into the lock seat to limit the slag collection door 17.

[0026] The working principle of this utility model is as follows: the entire furnace body can be placed using two supports 111; the two sealing doors 15 can be quickly and simultaneously combined and sealed; materials can be conveniently placed and removed from the heating tray 31 via the upper opening slot; and zone heating can be achieved using one or more heating tubes 22, i.e., independent heating zones are set at different locations in the furnace chamber. Each heating zone is individually adjusted using a precise temperature control algorithm via a temperature controller 21 to achieve uniform temperature throughout the furnace chamber, ensuring that the material is heated evenly. The graphite billet is preheated via the heating tray 31, and the billet is slowly heated. To remove surface moisture and volatiles in preparation for subsequent high-temperature sintering, the preheated graphite billet undergoes high-temperature sintering. Two independent dampers, in conjunction with a vacuum pump, are used to create a vacuum within the furnace. Under the combined effects of high vacuum and high temperature, the graphite crystal structure gradually improves, impurities are further eliminated, and the graphite's performance is significantly enhanced. The sintered graphite products then enter a cooling process, where two independent dampers, along with an air pump, are used to rapidly cool the furnace, preventing the graphite from undergoing performance changes due to prolonged exposure to high temperatures. The cooled graphite products are then continuously removed from the top opening slot, completing the entire production process.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous vacuum sintering furnace, comprising a sintering furnace body (1), wherein the sintering furnace body (1) is equipped with a heating mechanism (2), and wherein the sintering furnace body (1) has a built-in support mechanism (3); characterized in that: The sintering furnace body (1) includes a heat-insulating shell (11), and a heat-conducting inner liner (12) is coaxially arranged inside the heat-insulating shell (11). A first opening groove (13) is opened at the top of the heat-conducting inner liner (12), and a second opening groove (14) matching the first opening groove (13) is opened at the top of the heat-insulating shell (11). Multiple mounting grooves (112) are opened at one end of the heat-insulating shell (11) and outside the heat-conducting inner liner (12) in an arc shape at equal angles. The heating mechanism (2) The device includes multiple heating tubes (22) fixedly installed in multiple mounting slots (112), with the same thermostat (21) installed at one end of each heating tube (22); a sealing door (15) is rotatably installed on the top of the heat insulation shell (11) and on both sides of the opening of its second opening slot (14); a slag collection port (16) is provided below the other end of the heat-conducting inner liner (12); and a slag collection door (17) is rotatably installed at the other end of the heat insulation shell (11) and at the opening of the slag collection port (16).

2. The continuous vacuum sintering furnace according to claim 1, characterized in that: The supporting mechanism (3) includes a heating tray (31) fixedly connected horizontally below the inner wall of the heat-conducting inner liner (12), and the bottom wall of the heating tray (31) has multiple slag leakage ports (32) arranged in a rectangular array.

3. The continuous vacuum sintering furnace according to claim 1, characterized in that: The supporting mechanism (3) also includes a waste collection tray (33) that is horizontally fixedly connected to the lower side wall of the heat-conducting inner liner (12), and the waste collection tray (33) is located below the heating tray (31).

4. The continuous vacuum sintering furnace according to claim 1, characterized in that: The bottom of the thermal insulation shell (11) is symmetrically fixedly connected to two supports (111).

5. The continuous vacuum sintering furnace according to claim 1, characterized in that: A ventilation groove (19) is provided above one end of the heat-conducting inner liner (12), and a second independent damper (110) is fixedly installed at the ventilation groove (19).

6. The continuous vacuum sintering furnace according to claim 1, characterized in that: The slag collection door (17) has a through groove between the two side walls of the door panel, and a first independent air door (18) is fixedly installed at the through groove.

7. The continuous vacuum sintering furnace according to claim 1, characterized in that: The front end of the slag collection door (17) is rotatably equipped with a locking block, and the other end of the heat insulation shell (11) is fixedly connected with a lock seat that matches the locking block.

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