Vacuum furnace material taking mechanism

Abstract

The utility model relates to vacuum furnace powder technology field, the utility model provides a vacuum furnace material taking mechanism, the furnace body has the vacuum cavity, the powder room, movable bottom plate and connecting rod mechanism are located in the vacuum cavity, the connecting rod mechanism is established on the inner wall or furnace body inner wall in the powder room, the connecting rod mechanism is movably connected with movable bottom plate bottom, the furnace body bottom has and the discharge gate of vacuum cavity communication, the connecting rod mechanism is used for driving movable bottom plate to ascend to close the powder room and enclose the powder cavity, or drives movable bottom plate to descend and lean, to pour the powder material to the discharge gate, the discharge gate below is connected with the powder tank, is equipped with the valve no.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace powder making technology, specifically to a vacuum furnace material handling mechanism. Background Technology

[0002] When removing powder from a vacuum furnace, the vacuum is broken before the powder is taken out, which may introduce outside air. If the powder is easily oxidized, such as titanium or aluminum powder, contact with air can easily lead to oxidation and deterioration. Therefore, additional protective measures are needed to prevent powder deterioration during removal, such as filling with inert gas. Alternatively, the powder can be removed after the vacuum furnace has cooled down.

[0003] In actual production, filling with inert gas is a rather cumbersome process, and cooling the vacuum furnace requires 6-9 hours. Both methods extend the production cycle and reduce production efficiency, making them unsuitable for industrial production. Therefore, it is necessary to improve the existing powder removal method to quickly remove the material from the vacuum chamber without disrupting the vacuum, thus resuming production as soon as possible. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this utility model provide a vacuum furnace material handling mechanism, which solves the technical problem in the prior art that powder cannot be quickly removed without destroying the vacuum environment, thus affecting production efficiency.

[0005] According to one aspect, at least one embodiment of the present invention provides a vacuum furnace material handling mechanism, disposed on a furnace body, the furnace body having a powder-making chamber, a movable bottom plate, and a powder hopper, characterized in that the material handling mechanism includes a linkage mechanism, the furnace body has a vacuum chamber, the powder-making chamber, the movable bottom plate, and the linkage mechanism are located within the vacuum chamber, the linkage mechanism is disposed on the inner wall of the powder-making chamber or the inner wall of the furnace body, the linkage mechanism is movably connected to the bottom of the movable bottom plate, the bottom of the furnace body has a discharge port communicating with the vacuum chamber, the discharge port is located below the movable bottom plate, the linkage mechanism is used to drive the movable bottom plate to rise to close the powder-making chamber and form a powder-making cavity, or to drive the movable bottom plate to fall and tilt to pour powder into the discharge port, the powder hopper is connected below the discharge port, a valve one is provided at the discharge port, the valve one is used to open or close the discharge port, and a valve two is provided on the powder hopper, the valve two is used to open or close the powder hopper.

[0006] As a further technical solution, the linkage mechanism includes a mounting frame disposed on the inner wall of the pulverizing chamber or the inner wall of the furnace, and a first linkage and a second linkage disposed on the mounting frame. The first linkage and the second linkage are spaced apart, and the top of the first linkage and the top of the second linkage are both hinged to the bottom of the movable base plate. The first linkage and the second linkage move synchronously to drive the movable base plate to close or unclose the pulverizing chamber, and the first linkage and the second linkage move asynchronously to tilt the movable base plate or restore it to a horizontal position.

[0007] As a further technical solution, the connecting rod is hinged to the center position of the bottom of the movable base plate.

[0008] As a further technical solution, the furnace body is also provided with a limiting frame, which is located on one side of the second connecting rod. The limiting frame has a limiting part one and a limiting part two distributed vertically. A stop bar is provided on the side wall of the second connecting rod. After the stop bar abuts against the limiting part one, it is used to limit the upward movement of the second connecting rod. After the stop bar abuts against the limiting part two, it is used to limit the downward movement of the second connecting rod.

[0009] As a further technical solution, a thermal insulation layer is also included, which is disposed on the outside of the powder mill.

[0010] As a further technical solution, a baffle is provided at the end of the movable base plate away from the discharge port, and the baffle is used to prevent powder from leaking out from this end.

[0011] As a further technical solution, the powder-making chamber has a graphite crucible layer.

[0012] As a further technical solution, both valve one and valve two are slide gate valves.

[0013] As a further technical solution, a linear drive component is provided on the bottom wall of the furnace body. The linear drive component is driven and connected to the connecting rod. The linear drive component is located on one side of the discharge port.

[0014] As a further technical solution, a second linear drive component is provided on the bottom wall of the furnace body. The second linear drive component is driven and connected to the second connecting rod. The second linear drive component is located on one side of the limiting frame.

[0015] The beneficial effects of this utility model are as follows: In this invention, the movable connection structure between the linkage mechanism and the movable base plate allows the movable base plate to perform both lifting and tilting movements. In the lifted state, it can enclose the powder-making chamber to form a powder-making cavity that meets the powder-making requirements, ensuring the sealing of the powder-making process. In the tilted state, it provides directional guidance for the powder, allowing it to smoothly slide towards the discharge port, effectively preventing powder residue on the movable base plate and ensuring thorough material removal. The connection design between the discharge port and the vacuum chamber, and their placement below the movable base plate, combined with the tilting action of the movable base plate, forms a direct transfer channel for the powder from the powder-making chamber to the powder tank, shortening the powder transfer path and improving material removal efficiency. The separate structure of valve one and valve two enables independent on / off control of the discharge port and the powder tank, allowing powder to be removed without affecting the vacuum state of the vacuum chamber. This completely avoids the problem of external air entering due to vacuum breaking in traditional material removal methods, eliminating the need for additional inert gas filling or waiting for the furnace to cool down, significantly shortening the production cycle, improving production efficiency, and meeting the needs of continuous industrial production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of a vacuum furnace in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure in which connecting rod one and connecting rod two descend synchronously to the lower limit position in the embodiment; Figure 3 for Figure 1 A schematic diagram of the structure in the embodiment where the second connecting rod rises to drive the movable base plate to rotate and tilt the powder; Figure 4 for Figure 1 A schematic diagram of the structure of removing the powder container in the embodiment; Figure 5 for Figure 2 An enlarged structural diagram of part A in the embodiment; Figure 6 for Figure 3 A magnified structural diagram of part B in the embodiment; Figure 7 for Figure 3 A magnified structural diagram of part C in the embodiment; In the diagram: 1. Furnace body, 101. Vacuum chamber, 102. Discharge port, 2. Powdering chamber, 201. Powdering chamber, 3. Movable base plate, 301. Baffle, 4. Linkage mechanism, 401. Linkage 1, 402. Linkage 2, 403. Limiting frame, 431. Limiting part 1, 432. Limiting part 2, 404. Mounting frame, 405. Baffle bar, 5. Powder hopper, 6. Valve 1, 7. Valve 2, 8. Insulation layer, 9. Linear drive component 1, 10. Linear drive component 2. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0019] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] This embodiment relates to the field of vacuum furnace powder production technology, and is mainly applied to the material handling scenario after preparing metal powders (such as titanium powder, aluminum powder, and other easily oxidized powders) in a vacuum furnace. In industrial production, vacuum furnaces prepare powders by melting and atomizing metal raw materials in a vacuum environment, and the material handling process is a key step to ensure production continuity. Traditional material handling methods require breaking the vacuum or waiting for the furnace to cool down, resulting in long production cycles and easy powder oxidation. This vacuum furnace material handling mechanism is an improvement on this pain point.

[0025] like Figure 1 As shown, this invention illustrates the structure of a vacuum furnace during powder preparation in one embodiment. The vacuum furnace feeding mechanism is integrally mounted on the furnace body 1. The furnace body 1 contains a vacuum chamber 101. The powder preparation chamber 2, movable base plate 3, and connecting rod mechanism 4 are all assembled within the vacuum chamber 101. The powder hopper 5 is connected to the outer side of the bottom of the furnace body 1. The powder preparation chamber 2 is fixed at a predetermined position within the furnace body 1, and its inner side forms a powder preparation cavity 201 for preparing powder. The connecting rod mechanism 4 can be optionally installed on the inner wall of the powder preparation chamber 2 or the inner wall of the furnace body 1. Its top is movably connected to the bottom of the movable base plate 3, enabling the movable base plate 3 to achieve lifting and tilting movements. A discharge port 102 is provided at the bottom of the furnace body 1. This discharge port 102 vertically penetrates the bottom wall of the furnace body 1, with its upper end communicating with the vacuum chamber 101 and its lower end sealed to the powder hopper 5. A valve 6 is installed at the discharge port 102, and a valve 7 is installed at the feed end or discharge end of the powder tank 5. The opening and closing of the vacuum chamber 101 and the powder tank 5 can be switched by the independent control of the two valves.

[0026] The material handling mechanism provided in this embodiment uses the motion of the linkage mechanism 4 to drive the movable base plate 3 to achieve lifting and tilting actions, thereby switching the formation state of the powder making chamber 201 and the powder discharge state; by using the independent opening and closing control of valve 6 and valve 7, the vacuum environment of the vacuum chamber 101 is maintained during the powder transfer process to prevent outside air from entering. The workflow is as follows: During the powder preparation stage, the linkage mechanism 4 drives the movable base plate 3 to rise. The movable base plate 3 and the powder preparation chamber 2 cooperate to form a closed powder preparation cavity 201. At this time, valve 6 and valve 7 are both closed to ensure that the powder preparation process is completed in the vacuum chamber 101. During the material removal stage, the vacuum chamber 101 is kept in a vacuum state. The linkage mechanism 4 drives the movable base plate 3 to descend and tilt it. Under the tilting guidance of the movable base plate 3, the powder in the powder preparation cavity 201 slides along the movable base plate 3 into the discharge port 102. Then, valves 6 and 7 are opened one by one to pour the powder into the powder tank 5 through the discharge port 102. After all the powder has entered the powder tank 5, valves 6 and 7 are closed to allow for further processing of the powder in the powder tank 5 or to replace the powder tank 5. Throughout the material removal process, the vacuum chamber 101 is kept in a vacuum state and there is no need to break the vacuum.

[0027] The movable connection structure between the linkage mechanism 4 and the movable base plate 3 allows the movable base plate 3 to perform both lifting and tilting movements. In the lifted state, it can enclose the powder-making chamber 201 with the powder-making chamber 2 to meet the powder-making requirements, ensuring the sealing of the powder-making process. In the tilted state, it provides directional guidance for the powder, allowing it to smoothly slide towards the discharge port 102, effectively preventing powder residue on the movable base plate 3 and ensuring thorough material removal. The connection design between the discharge port 102 and the vacuum chamber 101, and its location below the movable base plate 3, combined with the tilting movement of the movable base plate 3, forms a direct transfer channel for the powder from the powder-making chamber 201 to the powder tank 5, shortening the powder transfer path and improving material removal efficiency. The separate structure of valve 6 and valve 7 enables independent on / off control of discharge port 102 and powder tank 5. Powder can be removed without affecting the vacuum state of vacuum chamber 101, completely avoiding the problem of external air entering due to vacuum breaking in traditional material handling methods. There is no need to fill in inert gas or wait for furnace body 1 to cool down, which greatly shortens the production cycle, improves production efficiency, and meets the needs of continuous industrial production.

[0028] like Figures 2-4As shown, this illustrates the powder extraction process inside a vacuum furnace in one embodiment of the present invention. The linkage mechanism 4 includes a mounting frame 404, a first connecting rod 401, and a second connecting rod 402. The mounting frame 404 is fixed to the inner wall of the powder-making chamber 2 or the inner wall of the furnace body 1 by bolts or welding. The first connecting rod 401 and the second connecting rod 402 are spaced apart and are both mounted on the mounting frame 404 in a liftable manner. The tops of the first connecting rod 401 and the second connecting rod 402 are both connected to the bottom of the movable base plate 3 by hinge shafts. Preferably, the first connecting rod 401 is hinged at the center of the bottom of the movable base plate 3, forming a stable support and rotation fulcrum. Inside the furnace body 1, a limiting frame 403 is also fixed. The limiting frame 403 is located on one side of the connecting rod 2 402. The limiting frame 403 has a limiting part 1 431 and a limiting part 2 432 that are distributed vertically. A stop bar 405 is welded to the side wall of the connecting rod 2 402. When the connecting rod 2 402 rises and falls, the stop bar 405 can abut against the limiting part 1 431 and the limiting part 2 432 respectively, thereby limiting the rising and falling range of the connecting rod 2 402.

[0029] Optionally, the outer side of the powder-making chamber 2 is wrapped with an insulation layer 8, which is fixed to the outer wall of the powder-making chamber 2 by adhesive or snap-fit, fully covering the sides and top area of ​​the powder-making chamber 2. The edge of the movable base plate 3 furthest from the discharge port 102 extends vertically upward to form a baffle 301, which is integrally formed with the movable base plate 3. A graphite crucible layer is provided on the inner surface of the powder-making chamber 2, which is integrated with the inner wall of the powder-making chamber 2 by embedding or coating, forming the inner wall surface of the powder-making cavity 201. Both valve 6 and valve 7 are slide gate valves, which can be driven manually or electrically. A sealing structure is provided between the slide gate and the valve seat to ensure sealing in the closed state.

[0030] Optionally, linear drive component 9 and linear drive component 10 are fixed on the bottom wall of the furnace body 1. Linear drive component 9 is located on one side of the discharge port 102, and its output shaft is connected to the bottom of connecting rod 401 via a coupling to achieve lifting and lowering drive of connecting rod 401. Linear drive component 10 is located on one side of the limit frame 403, and its output shaft is also connected to the bottom of connecting rod 402 via a coupling to achieve independent lifting and lowering drive of connecting rod 402. Linear drive component 9 and linear drive component 10 can be selected from cylinders, electric push rods, or hydraulic rods, etc. Their installation positions avoid the working areas of discharge port 102 and limit frame 403 to avoid interference with the operation of other components.

[0031] Specifically, during the pulverizing stage, linear drive component 9 and linear drive component 10 are activated synchronously, driving connecting rods 401 and 402 to rise and fall along the mounting frame 404. As the connecting rods rise, the movable base plate 3 is smoothly lifted until its side end is in contact with the edge of the side wall of the pulverizing chamber 2. At this point, the movable base plate 3 and the pulverizing chamber 2 enclose a closed pulverizing cavity 201. Simultaneously, valves 6 and 7 are both closed, and the vacuum chamber 101 maintains a preset vacuum environment, meeting the environmental requirements of the pulverizing process. During this process, the stop rod 405 on connecting rod 402 rises with it. When the stop rod 405 abuts against the limiting part 431 of the limiting frame 403, connecting rod 402 stops rising, ensuring the precise rising position of the movable base plate 3 and avoiding excessive compression of the pulverizing chamber 2.

[0032] During the material handling phase, the vacuum state of the vacuum chamber 101 is maintained. Subsequently, linear drive component 9 and linear drive component 10 descend synchronously first, and then move asynchronously. For example, linear drive component 10 drives connecting rod 402 to rise, while linear drive component 9 keeps the position of connecting rod 401 unchanged, or connecting rod 401 descends at a faster speed and connecting rod 402 descends at a slower speed. Since connecting rod 401 is hinged at the center of the movable base plate 3, connecting rod 402 will cause the movable base plate 3 to rotate around the hinge point of connecting rod 401, causing the movable base plate 3 to tilt towards the discharge port 102. The powder in the powdering chamber 201 slides along the inclined surface of the movable base plate 3 under the action of gravity. The baffle 301 prevents the powder from leaking out from the other end of the movable base plate 3, ensuring that all the powder gathers and slides into the discharge port 102. At the same time, the driving mechanism of valve 6 and valve 7 is activated, causing the slide plate of the slide valve to slide open horizontally, forming a communication channel between the discharge port 102 and the powder tank 5, and then entering the powder tank 5 through the discharge port 102. When the connecting rod 402 descends to the point where the baffle 405 abuts against the limiting part 432, the connecting rod 402 stops descending, and the movable base plate 3 maintains a stable inclined angle, ensuring that the powder can be completely discharged.

[0033] During the powder processing stage, once all the powder has entered powder hopper 5, valve 6 is closed to disconnect the vacuum chamber 101 from powder hopper 5. At this time, vacuum chamber 101 can maintain a vacuum state, preparing for the next powder production cycle. The operator can then close valve 7 and replace powder hopper 5. The entire process does not require breaking the vacuum environment of vacuum chamber 101, significantly shortening the production interval.

[0034] Link 1 401 is hinged to the center of the bottom of the movable base plate 3, so that the force on the movable base plate 3 during lifting and lowering is symmetrically distributed around the center, reducing tilting or deformation caused by force offset and improving the fitting accuracy when the powder-making chamber 201 is closed. At the same time, the central hinge point provides a fixed fulcrum for the tilting of the movable base plate 3. With the action of link 2 402, the tilting angle can be effectively controlled to avoid irregular shaking of the movable base plate 3 during tilting, ensuring the directional discharge of powder and improving the stability of the material handling process. The setting of the insulation layer 8 directly reduces the heat loss of the powder-making chamber 2 and reduces the energy consumption required to maintain the powder-making temperature. At the same time, the stable temperature of the powder-making chamber 2 ensures the consistency of powder generation and improves the powder quality. In addition, the slow temperature change of the powder-making chamber 2 during the material handling process avoids thermal deformation of the powder-making chamber 2 or the movable base plate 3 caused by sudden temperature changes, extends the service life of the components, and can resume powder making without long reheating after material handling, further shortening the production cycle.

[0035] like Figures 5-7 As shown, this invention illustrates the cooperative structure of the limiting frame 403, baffle 301, and stop rod 405 in one embodiment. The abutting cooperation between the limiting part 431 and the stop rod 405 limits the maximum upward range of the connecting rod 402, ensuring the consistent position of the movable base plate 3 when it rises to the closed powder-making chamber 2, and preventing structural damage to the movable base plate 3 or the powder-making chamber 2 due to excessive rising. The abutting cooperation between the limiting part 432 and the stop rod 405 limits the maximum downward range of the connecting rod 402, ensuring that the tilt angle of the movable base plate 3 remains stable within a reasonable range, thus ensuring smooth powder discharge while preventing excessive tilt angle from causing powder splashing or overloading of the connecting mechanism 4. The baffle 301 directly prevents side leakage of powder when the movable base plate 3 is tilted, reducing powder waste.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum furnace material handling mechanism, disposed on a furnace body (1), wherein the furnace body (1) is provided with a powder making chamber (2), a movable bottom plate (3), and a powder hopper (5), characterized in that, The material handling mechanism includes a linkage mechanism (4). The furnace body (1) has a vacuum chamber (101). The pulverizing chamber (2), the movable bottom plate (3), and the linkage mechanism (4) are located inside the vacuum chamber (101). The linkage mechanism (4) is located on the inner wall of the pulverizing chamber (2) or the inner wall of the furnace body (1). The linkage mechanism (4) is movably connected to the bottom of the movable bottom plate (3). The bottom of the furnace body (1) has a discharge port (102) communicating with the vacuum chamber (101). The discharge port (102) is located below the movable bottom plate (3). The linkage mechanism (4) is used to drive the movable base plate (3) to rise to close the powder making chamber (2) to form a powder making cavity (201), or to drive the movable base plate (3) to fall and tilt to pour powder into the discharge port (102). The powder tank (5) is connected below the discharge port (102). A valve (6) is provided at the discharge port (102). The valve (6) is used to open or close the discharge port (102). A valve (7) is provided on the powder tank (5). The valve (7) is used to open or close the powder tank (5).

2. The vacuum furnace material handling mechanism according to claim 1, characterized in that, The linkage mechanism (4) includes a mounting bracket (404) installed on the inner wall of the pulverizing chamber (2) or the inner wall of the furnace body (1), and a first connecting rod (401) and a second connecting rod (402) that are lifted and lowered on the mounting bracket (404). The first connecting rod (401) and the second connecting rod (402) are spaced apart. The top of the first connecting rod (401) and the top of the second connecting rod (402) are both hinged to the bottom of the movable base plate (3). The first connecting rod (401) and the second connecting rod (402) are lifted and lowered synchronously to drive the movable base plate (3) to close or unclose the pulverizing chamber (2). The first connecting rod (401) and the second connecting rod (402) are lifted and lowered asynchronously to tilt the movable base plate (3) or restore it to a horizontal position.

3. The vacuum furnace material handling mechanism according to claim 2, characterized in that, The connecting rod (401) is hinged to the center of the bottom of the movable base plate (3).

4. The vacuum furnace material handling mechanism according to claim 2, characterized in that, The furnace body (1) is also provided with a limiting frame (403). The limiting frame (403) is located on one side of the connecting rod two (402). The limiting frame (403) has a limiting part one (431) and a limiting part two (432) distributed vertically. A stop bar (405) is provided on the side wall of the connecting rod two (402). After the stop bar (405) abuts against the limiting part one (431), it is used to limit the upward movement of the connecting rod two (402). After the stop bar (405) abuts against the limiting part two (432), it is used to limit the downward movement of the connecting rod two (402).

5. The vacuum furnace material handling mechanism according to claim 1, characterized in that, It also includes a heat insulation layer (8), which is disposed on the outside of the powder making chamber (2).

6. The vacuum furnace material handling mechanism according to claim 1, characterized in that, The movable base plate (3) is provided with a baffle (301) at one end away from the discharge port (102), and the baffle (301) is used to prevent the powder from leaking out from this end.

7. The vacuum furnace material handling mechanism according to claim 1, characterized in that, The powder-making chamber (2) has a graphite crucible layer.

8. The vacuum furnace material handling mechanism according to claim 1, characterized in that, Both valve one (6) and valve two (7) are slide gate valves.

9. The vacuum furnace material handling mechanism according to claim 2, characterized in that, The bottom wall of the furnace body (1) is provided with a linear drive component (9), which is driven to connect with the connecting rod (401). The linear drive component (9) is located on one side of the discharge port (102).

10. The vacuum furnace material handling mechanism according to claim 4, characterized in that, The bottom wall of the furnace body (1) is provided with a linear drive component two (10), which is driven to connect with the connecting rod two (402). The linear drive component two (10) is located on one side of the limiting frame (403).

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