Full-automatic continuous vacuum furnace

Abstract

The invention belongs to the technical field of heating equipment, and particularly relates to a full-automatic continuous vacuum furnace which comprises a transversely-arranged furnace body, the two ends of the furnace body are slidably connected with a feeding part and a discharging part respectively, the feeding part comprises an end cover and a charging mechanism, and the charging mechanism is arranged on the inner side of the end cover and transversely slidably connected into the furnace body. The discharging part comprises a tail cover and a discharging mechanism, the discharging mechanism is arranged on the inner side of the tail cover and transversely connected into the furnace body in a sliding mode, the charging mechanism and the discharging mechanism are arranged up and down, a steering gear is connected between the charging mechanism and the discharging mechanism in a meshed mode, and the steering gear is arranged on the inner side wall of the furnace body. The rare earth metal raw materials are guided into the unloading mechanism from the loading mechanism in the heat treatment process of the vacuum furnace, and in the loading process of the loading mechanism, the unloading mechanism can unload the previous group of rare earth metal raw materials at the same time, so that loading and unloading can be carried out at the same time, the overall heating reduction efficiency of the vacuum furnace is effectively improved, and the production cost is reduced. Therefore, the working efficiency is better improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heating equipment, and particularly relates to a fully automatic continuous vacuum furnace. Background Art

[0002] A vacuum furnace is a furnace in which, within a specific space of the furnace chamber, a vacuum system (carefully assembled from components such as vacuum pumps, vacuum measuring devices, and vacuum valves) is used to evacuate some substances within the furnace chamber, so that the pressure within the furnace chamber is less than one standard atmospheric pressure, and the space within the furnace chamber thus achieves a vacuum state. This is the vacuum furnace.

[0003] Rare earth metals, also known as rare earth elements, are the general name for 17 elements including scandium, yttrium, and the lanthanide series in Group IIIB of the periodic table, commonly represented by R or RE; from the discovery of the first rare earth element yttrium in 1794 to the discovery of the natural rare earth element promethium in 1972, it took 178 years for people to find all 17 rare earth elements in nature; the luster of rare earth metals is between silver and iron and the chemical activity of rare earth metals is very strong; after ore dressing and concentration of rare earth ores, etc., it is necessary to separate and purify them to form rare earth metal raw materials, and a reduction process is carried out using a vacuum furnace.

[0004] The publication number is CN220288137U, and the patent name is a vacuum furnace for rare earth metal smelting and preparation, which discloses a housing 1, a base 2 is provided below the housing 1, a heating coil 3, a furnace body 4, and a shaking motor 6 are provided on the base 2, the heating coil 3 is fixedly connected above the base 2, the furnace body 4 is arranged inside the heating coil 3, and a heating column 5 is arranged in the center of the furnace body 4; a shaking assembly is arranged between the furnace body 4 and the base 2, and the shaking assembly is used to shake the furnace body 4 so that the samarium oxide and lanthanum metal inside the furnace body 4 can be fully contacted. A sealing baffle 15 is arranged outside the base 2, the upper end surface of the sealing baffle 15 is matched with the lower end surface structure of the housing 1, and a sealing ring is arranged inside the sealing baffle 15 and other technical features. It has the technical advantages that by arranging a heating column in the center of the furnace body, when an electric current passes through the heating coil, due to the principle of electromagnetic induction, metal objects inside the heating coil are heated. Since the heating column is arranged in the center of the furnace body, the temperature of the heating column will also increase accordingly. The pressing blocks of samarium oxide and lanthanum metal are heated by the temperature rise of the outer wall of the furnace body and the central heating column, which can avoid uneven heating. By arranging a shaking assembly, the furnace body can perform a circular motion inside the heating coil, and the furnace body does not rotate during the circular motion, so that the samarium oxide and lanthanum metal inside the furnace body are fully contacted during the shaking process, enabling the samarium oxide to undergo a full reduction reaction and improving the collection rate of metallic samarium, etc.

[0005] However, the existing defects or problems are that it is necessary to frequently use lifting equipment to open the housing for heat treatment of multiple groups of rare earth metal raw materials, which is not convenient for continuous feeding and discharging of rare earth metal raw materials; in addition, during a process, it is necessary to frequently feed, discharge, and then feed again, and proceed according to the program steps, resulting in low overall heating and reduction efficiency. Therefore, based on the above defects, the applicant has proposed a better technical solution to solve the above technical problems.

[0006] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present invention and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0007] The present invention aims to solve the above technical problems and provides a fully automatic continuous vacuum furnace, mainly solving the technical problems in the prior art that it is necessary to frequently use lifting equipment to open the housing for heat treatment of multiple groups of rare earth metal raw materials, which is not convenient for continuous discharging of rare earth metal raw materials; in addition, during the process, it is necessary to frequently discharge, take materials, and then discharge again, and proceed according to the program steps, resulting in low overall heating and reduction efficiency.

[0008] To achieve the above object, the technical solution of the present invention is as follows:

[0009] A fully automatic continuous vacuum furnace includes a horizontally arranged furnace body, and a feeding part and a discharging part are respectively slidably connected to both ends of the furnace body.

[0010] The feeding part includes an end cover and a loading mechanism. The loading mechanism is arranged inside the end cover and is horizontally slidably connected inside the furnace body. The discharging part includes a tail cover and a discharging mechanism. The discharging mechanism is arranged inside the tail cover and is horizontally slidably connected inside the furnace body.

[0011] The loading mechanism and the discharging mechanism are arranged up and down, and a steering gear is meshingly connected between the two. The steering gear is arranged on the inner side wall of the furnace body.

[0012] Preferably, the loading mechanism includes a driving motor 1, a sliding frame, and a plurality of rotating components. The sliding frame is slidably connected inside the furnace body through a guide rail, and a rack that is cooperatively connected with the steering gear is arranged thereon. A plurality of the rotating components are all rotatably connected inside the sliding frame, and two adjacent rotating components are meshingly connected.

[0013] The driving motor 1 is arranged on the outer end face of the end cover, and its output end is connected to one of the rotating components located in the middle.

[0014] Preferably, the rotating component includes a bearing disk, a rotating shaft, and a meshing gear. The bearing disk is rotatably connected inside the sliding frame through the rotating shaft, and the meshing gear is arranged on the rotating shaft.

[0015] Two adjacent meshing gears are meshed and connected, and the first driving motor is connected to one of the meshing gears located in the middle.

[0016] Preferably, the discharging mechanism has the same structure as the loading mechanism.

[0017] Preferably, a material leveling mechanism is slidably connected to the sliding frame. The material leveling mechanism includes a U-shaped frame, sliders, a first cylinder, and a leveling frame. One slider is provided at each end of the U-shaped frame.

[0018] A chute is formed in the sliding frame, the sliders are slidably arranged in the chute, the first cylinder is arranged on the U-shaped frame, and its telescopic end extends downward and is connected to the leveling frame.

[0019] Preferably, the present invention further includes a driving mechanism. The driving mechanism includes a second motor and a threaded rod. The second motor is arranged on the outer end face of the end cover, and its output end is connected to the threaded rod. The threaded rod is rotatably connected in the chute and is threadedly connected to the slider.

[0020] Preferably, a first pipe and a second pipe are provided on the furnace body. The first pipe is connected to an external high vacuum pump system, and the second pipe is connected to an external air leakage system.

[0021] Preferably, a sealing mechanism is provided in the second pipe. The sealing mechanism includes an annular sheet, a magnetic sheet provided with a plurality of through holes, a sealing magnetic plate, connecting bolts, and springs. The annular sheet is arranged in the second pipe, and the magnetic sheet is arranged inside the annular sheet.

[0022] The sealing magnetic plate is attached to the bottom of the annular sheet, and the two are connected by the connecting bolts.

[0023] Springs are sleeved on the connecting bolts above the annular sheet.

[0024] Preferably, second cylinders and guide sliding columns are provided between the end cover and the furnace body and between the tail cover and the furnace body.

[0025] Guide chutes are formed on the side wall of the furnace body. One end of the guide sliding column is connected to the end cover or the tail cover, and the other end is slidably arranged in the guide chute. The second cylinders are arranged on the outer wall of the furnace body, and their telescopic ends are connected to the end cover or the tail cover.

[0026] Due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0027] The present invention provides a fully automatic continuous vacuum furnace, which has a simple structure and ingenious design. A feeding part and a discharging part slidably connected to both ends of the furnace body are provided, and the charging mechanism and discharging mechanism provided in the two are meshed and connected with the steering gear in the furnace body, so that the two can be driven simultaneously as a whole. That is, during the heat treatment of rare earth metal raw materials in the vacuum furnace, they are first introduced from the charging mechanism to the discharging mechanism. Then, when the charging mechanism slides to the outside of the furnace body, through the action of the steering gear, the discharging mechanism simultaneously slides to the outside of the furnace body. During the process of feeding the charging mechanism, the discharging mechanism can simultaneously discharge the rare earth metal raw materials of the previous batch, so that feeding and discharging can be carried out simultaneously, effectively improving the overall heating and reduction efficiency of the vacuum furnace, and thus better improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is a schematic structural diagram of the charging mechanism of the present invention;

[0030] Figure 3 is Figure 2 an enlarged schematic view of part A of

[0031] Figure 4 is Figure 2 an enlarged schematic view in the B-B direction of

[0032] Figure 5 is Figure 1 an enlarged schematic view of part C of

[0033] The main reference numerals of the components in the drawings are explained as follows:

[0034] 1, furnace body; 11, pipe one; 12, pipe two; 13, guide chute; 2, feeding part; 21, end cover; 22, charging mechanism; 221, driving motor one; 222, sliding frame; 223, rotating assembly; 2231, bearing disc; 2232, rotating shaft; 2233, meshing gear; 3, discharging part; 31, tail cover; 32, discharging mechanism; 4, steering gear; 5, material leveling mechanism; 51, U-shaped frame; 52, slider; 53, cylinder one; 54, equalizing frame; 6, driving mechanism; 61, motor two; 62, threaded rod; 7, sealing mechanism; 71, annular plate; 72, magnetic sheet; 73, sealing magnetic plate; 74, connecting bolt; 75, spring; 8, cylinder two; 9, guide slide column; 100, chute; 200, guide rail; 300, feeding system; 400, discharging system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment

[0037] As Figures 1 to 5 Shown in the figure, a fully automatic continuous vacuum furnace includes a horizontally arranged furnace body 1. The two ends of the furnace body 1 are respectively slidably connected with a feeding part 2 and a discharging part 3. The feeding part 2 includes an end cover 21 and a loading mechanism 22. The loading mechanism 22 is arranged inside the end cover 21 and is horizontally slidably connected inside the furnace body 1. The discharging part 3 includes a tail cover 31 and a discharging mechanism 32. The discharging mechanism 32 is arranged inside the tail cover 31 and is horizontally slidably connected inside the furnace body 1. The loading mechanism 22 and the discharging mechanism 32 are arranged up and down, and a steering gear 4 is meshed between the two. The steering gear 4 is arranged on the inner side wall of the furnace body 1; specifically, there are two steering gears 4, and the two steering gears 4 are oppositely arranged on the two inner side walls inside the furnace body 1.

[0038] In the present invention, the feeding part 2 and the discharging part 3 slidably connected to the furnace body 1 are arranged at both ends of the furnace body 1, and the loading mechanism 22 and the discharging mechanism 32 provided in the two are meshed with the steering gear 4 inside the furnace body 1 to drive the two as a whole simultaneously. That is, during the heat treatment of rare earth metal raw materials in the vacuum furnace, the raw materials are first introduced from the loading mechanism 22 to the discharging mechanism 32. Then, when the loading mechanism 22 slides to the outside of the furnace body 1, through the action of the steering gear 4, the discharging mechanism 32 slides to the outside of the furnace body 1 at the same time. And during the process of loading the loading mechanism 22, the discharging mechanism 32 can unload the rare earth metal raw materials of the previous batch at the same time, so that loading and unloading can be carried out simultaneously, effectively improving the overall heating and reduction efficiency of the vacuum furnace, and thus better improving the working efficiency.

[0039] In this embodiment, please refer to Figure 2, the loading mechanism 22 includes a driving motor 1 221, a sliding frame 222 and a plurality of rotating components 223. The sliding frame 222 is slidably connected to the furnace body 1 through a guide rail 200, and is provided with a rack (not shown in the figure) that cooperates with the steering gear 4. A plurality of rotating components 223 are all rotatably connected in the sliding frame 222, and two adjacent rotating components 223 are meshed and connected. The driving motor 1 221 is arranged on the outer end surface of the end cover 21, and its output end is connected to a rotating component 223 in the middle. Specifically, during feeding, the plurality of rotating components 223 are connected to each other to form a large-area bearing section in the initial state. The sliding frame 222 slides to the outside of the furnace body 1, and the rare earth metal raw material is introduced onto the bearing section by the feeding system 300, and then the sliding frame 222 is pushed into the furnace body 1.

[0040] Specifically, please refer to Figure 3 , the rotating component 223 includes a bearing disc 2231, a rotating shaft 2232 and a meshing gear 2233. The bearing disc 2231 is rotatably connected to the sliding frame 222 through the rotating shaft 2232. The meshing gear 2233 is arranged on the rotating shaft 2232, and two adjacent meshing gears 2233 are meshed and connected. The driving motor 1 221 is connected to a meshing gear 2233 in the middle. For the above content, it can be regarded that a plurality of bearing discs 2231 are connected to each other to form a large-area bearing section in the initial state. The bearing section is placed in the sliding frame 222 to form a recess, and the recess can be used as a heating and material-containing space.

[0041] According to requirements, the structure of the unloading mechanism 32 can be set to be the same as that of the loading mechanism 22, which is convenient for standardizing the design of each component and facilitating production and manufacturing.

[0042] After the heat treatment of the rare earth metal raw material in the vacuum furnace is completed, in the furnace body 1, the driving motor 1 221 of the loading mechanism 22 rotates, and the meshing gear 2233 is used to rotate each bearing disc 2231 from the horizontal state to the vertical state, and the previously formed bearing section is opened so that the rare earth metal raw material is introduced onto the unloading mechanism 32.

[0043] After the carrier disk 2231 is reset, following the above steps, when the sliding frame 222 of the loading mechanism 22 slides to the outside of the furnace body 1 during loading, the sliding frame 222 of the unloading mechanism 32 also slides to the outside of the furnace body 1. When the rare earth metal raw material is introduced into the loading mechanism 22 by the feeding system 300, the driving motor 221 of the unloading mechanism 32 rotates, and under the action of the meshing gears 2233, each carrier disk 2231 is rotated from the horizontal state to the vertical state, and the previously formed bearing cross-section is opened, so that the rare earth metal raw material is introduced into the discharging system 400. Thus, during the feeding process of the loading mechanism 22, the unloading mechanism 32 can unload the rare earth metal raw material of the previous batch at the same time, and the feeding and unloading can be carried out simultaneously, effectively improving the overall heating and reduction efficiency of the vacuum furnace.

[0044] In this embodiment, please refer to Figure 4 , a material leveling mechanism 5 is slidably connected to the sliding frame 222. The material leveling mechanism 5 includes a U-shaped frame 51, sliders 52, a first cylinder 53, and a leveling frame 54. A slider 52 is provided at each end of the U-shaped frame 51. A chute 100 is formed on the sliding frame 222, and the slider 52 is slidably disposed in the chute 100. The first cylinder 53 is disposed on the U-shaped frame 51, and its telescopic end extends downward and is connected to the leveling frame 54. During specific operation, the U-shaped frame 51 can level the rare earth metal raw material by means of the leveling frame 54 during the sliding process of the sliding frame 222, avoiding it from piling up and affecting the overall heat treatment effect. When the leveling frame 54 interferes with the carrier disk 2231, it can be lifted by the first cylinder 53 to avoid mutual collision between the two.

[0045] In this embodiment, the present invention further includes a driving mechanism 6. The driving mechanism 6 includes a second motor 61 and a threaded rod 62. The second motor 61 is disposed on the outer end face of the end cover 21, and its output end is connected to the threaded rod 62. The threaded rod 62 is rotatably connected in the chute 100 and is threadedly connected to the slider 52. The sliding of the U-shaped frame 51 can be realized by driving the rotation of the threaded rod 62 by the second motor 61.

[0046] In this embodiment, please refer to Figure 5, a pipe one 11 and a pipe two 12 are provided on a furnace body 1. The pipe one 11 is connected to an external high vacuum pump system, and the pipe two 12 is connected to an external air release system. Specifically, a sealing mechanism 7 is provided in the pipe two 12. The sealing mechanism 7 includes an annular piece 71, a magnetic piece 72 provided with a plurality of through holes, a sealing magnetic plate 73, a connecting bolt 74 and a spring 75. The annular piece 71 is arranged in the pipe two 12, the magnetic piece 72 is arranged in the annular piece 71, the sealing magnetic plate 73 is attached to the bottom of the annular piece 71, and the two are connected by the connecting bolt 74. A spring 75 is sleeved on the connecting bolt 74 above the annular piece 71. The sealing mechanism 7 can effectively prevent gas from flowing back and prevent gas or other substances from flowing back into the furnace body 1. During specific operation, the air pump in the external air release system is started, and the gas is sucked out through the through holes of the magnetic piece 72 and the sealing magnetic plate 73 is squeezed to be in an open state, and the gas can complete the air release operation. When the air pump is stopped, the sealing magnetic plate 73 is reset under the action of the spring 75 to be in a closed state, avoiding gas backflow and preventing gas or other substances from flowing back into the furnace body 1.

[0047] In this embodiment, please refer to Figure 1 , a cylinder two 8 and a guide slide column 9 are provided between the end cover 21 and the furnace body 1 and between the tail cover 31 and the furnace body 1. A guide chute 13 is provided on the side wall of the furnace body 1. One end of the guide slide column 9 is connected to the end cover 21 or the tail cover 31, and the other end slides in the guide chute 13. The cylinder two 8 is arranged on the outer wall of the furnace body 1, and its telescopic end is connected to the end cover 21 or the tail cover 31. When specifically arranged, at one end of the end cover 21, in order to prevent the cylinder two 8 and the guide slide column 9 from interfering with the feeding process of the loading mechanism 22, the cylinder two 8 and the guide slide column 9 are only arranged on both sides and below the furnace body 1. At the same time, in order to prevent the cylinder two 8 and the guide slide column 9 from interfering with the discharging process of the discharging mechanism 32, at one end of the tail cover 31, the cylinder two 8 and the guide slide column 9 are only arranged on both sides and above the furnace body 1.

[0048] The working principle of the present invention:

[0049] The present invention provides a fully automatic continuous vacuum furnace. When specifically used, as Figure 1 shown, during feeding, rare earth metal raw materials are introduced into the loading mechanism 22 by the feeding system 300. The cylinder two 8 drives the loading mechanism 22 to slide into the furnace body 1. At this time, the end cover 21 and the tail cover 31 close the furnace body 1. The external high vacuum pump system is started to pump the furnace body 1 to a vacuum state to heat-treat the rare earth metal raw materials on the loading mechanism 22. After the heat treatment of the rare earth metal raw materials in the vacuum furnace is completed, in the furnace body 1, the driving motor one 221 of the loading mechanism 22 rotates, and the respective bearing disk pieces 2231 are rotated from a horizontal state to a vertical state by the action of the meshing gears 2233. The previously formed bearing cross-section is opened, and the rare earth metal raw materials are introduced onto the discharging mechanism 32. After the bearing disk pieces 2231 are reset, the external air release system is started to discharge the gas.

[0050] When the next group of rare earth metal raw materials is fed, while the sliding frame 222 of the loading mechanism 22 is driven by the cylinder two 8 to slide outside the furnace body 1, the sliding frame 222 of the unloading mechanism 32 also slides outside the furnace body 1. When the rare earth metal raw materials are introduced into the loading mechanism 22 by the feeding system 300, the driving motor one 221 of the unloading mechanism 32 rotates, and under the action of the meshing gears 2233, each bearing disk 2231 is rotated from the flat state to the vertical state, and the previously formed bearing cross-section is opened, so that the rare earth metal raw materials are introduced into the discharging system 400. After the bearing disk 2231 is reset, the above steps are repeated. Thus, during the feeding process of the loading mechanism 22, the unloading mechanism 32 can unload the rare earth metal raw materials of the previous batch at the same time, and the feeding and unloading can be carried out simultaneously, effectively improving the overall heating and reduction efficiency of the vacuum furnace.

[0051] The above description is a detailed description of the preferred and feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A fully automatic continuous vacuum furnace, characterized in that: It comprises a furnace body (1) arranged transversely, wherein two ends of the furnace body (1) are respectively slidably connected with a feeding part (2) and a discharging part (3), The feeding portion (2) comprises an end cover (21) and a loading mechanism (22), wherein the loading mechanism (22) is arranged inside the end cover (21) and is laterally slidably connected to the furnace body (1); the discharging portion (3) comprises a tail cover (31) and a discharging mechanism (32), wherein the discharging mechanism (32) is arranged inside the tail cover (31) and is laterally slidably connected to the furnace body (1); The loading mechanism (22) and the unloading mechanism (32) are arranged vertically and a steering gear (4) is meshedly connected between the two, and the steering gear (4) is arranged on the inner wall of the furnace body (1).

2. A fully automatic continuous vacuum furnace as claimed in claim 1, characterized in that: The loading mechanism (22) comprises a driving motor (221), a sliding frame (222) and a plurality of rotating components (223); the sliding frame (222) is slidably connected to the furnace body (1) via a guide rail (200), and is provided with a rack matched with the steering gear (4); the plurality of rotating components (223) are all rotatably connected to the sliding frame (222), and two adjacent rotating components (223) are meshedly connected. The driving motor 1 (221) is arranged on the outer end surface of the end cover (21), and its output end is connected to a rotating assembly (223) located in the middle.

3. A fully automatic continuous vacuum furnace as claimed in claim 2, characterized in that: The rotating assembly (223) comprises a bearing disc (2231), a rotating shaft (2232) and a meshing gear (2233); the bearing disc (2231) is rotatably connected to the sliding frame (222) via the rotating shaft (2232); the meshing gear (2233) is arranged on the rotating shaft (2232); Two adjacent meshing gears (2233) are meshingly connected, and the driving motor 1 (221) is connected to the meshing gear (2233) located in the middle.

4. A fully automatic continuous vacuum furnace as claimed in claim 3, characterized in that: The unloading mechanism (32) has the same structure as the loading mechanism (22).

5. A fully automatic continuous vacuum furnace as claimed in claim 2, characterized in that: The sliding frame (222) is slidably connected with a material distribution mechanism (5), the material distribution mechanism (5) comprising a U-shaped frame (51), a slider (52), a cylinder (53) and a distribution frame (54), and a slider (52) is provided at each end of the U-shaped frame (51). The sliding frame (222) is provided with a slide groove (100), the slider (52) is slidably arranged in the slide groove (100), the cylinder 1 (53) is arranged on the U-shaped frame (51), and its telescopic end extends downward and is connected to the equal distribution frame (54).

6. A fully automatic continuous vacuum furnace as claimed in claim 5, characterized in that: The invention also comprises a driving mechanism (6), wherein the driving mechanism (6) comprises a second motor (61) and a threaded rod (62), wherein the second motor (61) is arranged on the outer end surface of the end cover (21), and an output end thereof is connected to the threaded rod (62), and the threaded rod (62) is rotatably connected in the slide groove (100) and is threadedly connected to the slider (52).

7. A fully automatic continuous vacuum furnace as claimed in claim 1, characterized in that: The furnace body (1) is provided with a pipe 1 (11) and a pipe 2 (12), wherein the pipe 1 (11) is connected to an external high vacuum pump system, and the pipe 2 (12) is connected to an external air release system.

8. A fully automatic continuous vacuum furnace as claimed in claim 7, characterized in that: The second pipe (12) is provided with a sealing mechanism (7), the sealing mechanism (7) comprising an annular sheet (71), a magnetic sheet (72) with a plurality of through holes, a sealing magnetic plate (73), a connecting bolt (74) and a spring (75), the annular sheet (71) being provided in the second pipe (12), the magnetic sheet (72) being provided in the annular sheet (71), The sealing magnetic plate (73) is attached to the bottom of the annular sheet (71), and the two are connected via the connecting bolt (74). The spring (75) is sleeved on the connecting bolt (74) at the upper part of the annular sheet (71).

9. A fully automatic continuous vacuum furnace as claimed in claim 1, characterized in that: A second cylinder (8) and a guide slide column (9) are provided between the end cover (21) and the furnace body (1), and between the tail cover (31) and the furnace body (1). A guide slide groove (13) is provided on the side wall of the furnace body (1); one end of the guide slide column (9) is connected to the end cover (21) or the tail cover (31), and the other end is slidably arranged in the guide slide groove (13); the second cylinder (8) is arranged on the outer wall of the furnace body (1), and its telescopic end is connected to the end cover (21) or the tail cover (31).

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