Door locking device and vacuum high-pressure furnace

Abstract

The utility model relates to the technical field of vacuum high-pressure furnaces, in particular to a door locking device and a vacuum high-pressure furnace, and the door locking device is used for the vacuum high-pressure furnace and comprises at least two groups of door locking mechanisms; the door locking mechanisms are arranged in the circumferential direction of the furnace body at intervals. Each door locking mechanism comprises a supporting assembly, a first driving assembly, a second driving assembly and a pressing head. The supporting assembly comprises a supporting plate, and the first driving assembly is connected with the supporting plate and used for driving the supporting plate to horizontally move so that the supporting plate can be located on the lower sides of the bottom door and the turned-over edge or driving the supporting plate to be away from the bottom door and the furnace body. The second driving assembly is connected with the pressing head, the pressing head is located on the upper side of the flanging, and the second driving assembly is used for driving the pressing head to move in the direction perpendicular to the flanging so as to press the flanging and the furnace door. According to the door locking device and the vacuum high-pressure furnace provided by the utility model, the whole operation process of opening and locking the furnace body and the bottom door is very convenient and full of automation.

Description

Technical Field

[0001] This utility model relates to the field of vacuum high-pressure furnace technology, specifically to a door locking device and a vacuum high-pressure furnace. Background Technology

[0002] A vacuum high-pressure furnace is a device that combines high temperature and high pressure to synthesize, sinter, or heat treat materials in a vacuum or controlled atmosphere environment.

[0003] Currently, existing vacuum high-pressure furnaces include a furnace body, a bottom door, and a support frame. The furnace body is mounted on the support frame, and the bottom door is located below the furnace body at a certain height from the ground. The support frame is equipped with a device that can lift the furnace body to a designated height, allowing the material inside the furnace to fall onto the loading platform on the bottom door and then be removed. Both the furnace body and the bottom door have protruding flanges along their circumference. Clamping or bolt flange fixing structures are used to fix the flanges that fit between the bottom door and the furnace body. However, locking or loosening requires manual operation or tools, which lacks automation, is cumbersome, and can lead to situations where the valves cannot be loosened due to excessive friction. Utility Model Content

[0004] (I) This utility model provides a door locking device to alleviate the technical problem that the existing fixed method of the bottom door and the furnace body is cumbersome to operate and lacks automation.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, the present invention provides a door locking device for a vacuum high-pressure furnace. The vacuum high-pressure furnace includes a bottom door and a furnace body. The lower end of the furnace body is provided with an opening. The opening end of the furnace body forms an outwardly extending flange. The top view projection of the furnace body falls on the bottom door. The door locking device includes at least two sets of door locking mechanisms.

[0007] At least two sets of the locking mechanisms are arranged at intervals along the circumference of the furnace body. The locking mechanism includes a support assembly, a first drive assembly, a second drive assembly, and a pressure head.

[0008] The support assembly includes a support plate, and the first drive assembly is connected to the support plate to drive the support plate to translate so that the support plate is located under the bottom door and the flange, or to drive the support plate away from the bottom door and the furnace body;

[0009] The second drive assembly is connected to the pressure head, which is located on the upper side of the flange. The second drive assembly is used to drive the pressure head to move in a direction perpendicular to the flange to press the flange and the bottom door.

[0010] Furthermore, the support assembly also includes a mounting plate and a vertical plate. The mounting plate and the support plate are spaced apart along the height direction of the furnace body. The vertical plate is located between the mounting plate and the support plate, and both ends of the vertical plate are connected to the mounting plate and the support plate, respectively. The mounting plate, the vertical plate, and the support plate enclose a receiving space. The opening side of the receiving space faces the furnace body and the bottom door. The receiving space can accommodate the flange and the end of the bottom door.

[0011] Furthermore, the first drive assembly includes a first hydraulic cylinder, the output end of which is connected to the vertical plate. The first hydraulic cylinder is capable of driving the support plate closer to or further away from the furnace body and the bottom door.

[0012] Furthermore, the top wall of the mounting plate has a through hole that communicates with the receiving space. One end of the pressure head passes through the through hole and is located in the receiving space. The pressure head can extend and retract within the through hole to adjust its position inside the receiving space.

[0013] Furthermore, the second drive assembly includes a second hydraulic cylinder, which is located above the mounting plate, and the output end of the second hydraulic cylinder is connected to the end of the pressure head away from the receiving space. The second hydraulic cylinder can drive the pressure head to move in a direction perpendicular to the flange.

[0014] Furthermore, the first drive assembly also includes a connecting rod, one end of which is connected to the first hydraulic cylinder, and the other end of which is connected to the side wall of the upright plate facing the first hydraulic cylinder.

[0015] Furthermore, the locking mechanism also includes a sliding assembly located below the support plate, and the first hydraulic cylinder can drive the support plate to move along the extension direction of the sliding assembly.

[0016] Furthermore, the sliding assembly includes a slide rail and rollers. The slide rail is located below the support plate, and the rollers are provided on the bottom wall of the support plate. The rollers can roll in cooperation with the slide rail, and the rollers can move along the extension direction of the slide rail to drive the support plate to move synchronously.

[0017] Furthermore, the sliding assembly also includes a mounting base, which is disposed on the side of the support plate facing the roller, and the roller is mounted on the mounting base.

[0018] An embodiment of this utility model also provides a vacuum high-pressure furnace, including a furnace body, a bottom door, a support, a lifting cylinder, and the aforementioned door locking device;

[0019] The furnace body is mounted on the support frame, and the bottom door is located below the furnace body. The lower end of the furnace body has an opening, and the opening end of the furnace body forms an outwardly extending flange. The top view projection of the furnace body falls on the bottom door. The outer bottom wall of the bottom door is equipped with casters. The lifting cylinder is connected to the furnace body, and the lifting cylinder can drive the furnace body to move along its own height to approach or move away from the bottom door.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a door locking device, including at least two sets of door locking mechanisms. These mechanisms are arranged at intervals along the circumference of the furnace body. Each set includes a support component, a first drive component, a second drive component, and a pressure head. The support component includes a support plate. The first drive component drives the support plate to move horizontally, positioning it below the bottom door and the flange, or moving it away from the bottom door and the furnace body. Simultaneously, since the pressure head is located above the flange, the second drive component moves it perpendicular to the flange to press against the flange and the bottom door, thus locking the furnace body and the bottom door. When it is necessary to open the furnace body and the bottom door, the second drive component moves the pressure head away from the flange, and then the first drive component moves the support plate away from the furnace body, thereby opening the furnace body. The entire locking and opening process between the furnace body and the bottom door is very convenient and automated, effectively preventing situations where the furnace body and the bottom door cannot be opened quickly due to high friction caused by the use of clamp-type or bolt flange-type fixing structures after use.

[0022] This utility model also provides a vacuum high-pressure furnace, including a furnace body, a bottom door, a support frame, a lifting cylinder, and a door locking device. The support frame is placed on a fixed surface, and the furnace body is placed on the support frame. A caster wheel is provided on the outer bottom wall of the bottom door, enabling the bottom door to move. The distance between the outer bottom wall of the bottom door and the fixed surface is fixed. Therefore, by setting the diameter of the caster wheel and the caster wheel, when the support plate moves to below the bottom door, the outer bottom wall of the bottom door can be made to fit against the upper top wall of the support plate, so that the door locking mechanism can lock the flange and the bottom door. The furnace body can be moved... The lifting cylinder moves along its own height to approach or move away from the bottom door. Therefore, the lifting cylinder works in conjunction with the second cylinder, and the pressure head and support plate work together to lock the flange and the bottom door, thus locking the vacuum high-pressure furnace. After the material inside the furnace is processed, the second cylinder drives the pressure head away from the flange, and the first cylinder drives the support plate away from the furnace body and the bottom door. Finally, the lifting cylinder lifts the furnace body, and the material inside the furnace falls onto the loading platform on the bottom door, where it can be removed. The whole process is fully automated, requiring no manual operation, and can improve the efficiency of locking or releasing the furnace body and the bottom door. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of a door locking device provided for an embodiment of the utility model.

[0025] icon:

[0026] 100 - Furnace body; 101 - Bottom door; 102 - Flanged edge;

[0027] 200-pressure head;

[0028] 300 - Support plate; 301 - Mounting plate; 302 - Vertical plate; 303 - Accommodation space; 304 - Mounting base;

[0029] 400 - First hydraulic cylinder; 401 - Second hydraulic cylinder; 402 - Connecting rod;

[0030] 500 - Slide rail; 501 - Roller. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" 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; and they can refer to the connection within 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. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] Example 1

[0035] like Figure 1 As shown, this utility model provides a door locking device for a vacuum high-pressure furnace. The vacuum high-pressure furnace includes a bottom door 101 and a furnace body 100. The lower end of the furnace body 100 has an opening, and the opening end of the furnace body 100 forms an outwardly extending flange 102. The top view projection of the furnace body 100 falls on the bottom door 101. The door locking device includes at least two sets of door locking mechanisms; the at least two sets of door locking mechanisms are arranged at intervals along the circumference of the furnace body 100. The door locking mechanism includes a support assembly, a first drive assembly, a second drive assembly, and a pressure head 20. 0; The support assembly includes a support plate 300. A first drive assembly is connected to the support plate 300 and is used to drive the support plate 300 to translate so that the support plate 300 is located on the lower side of the bottom door 101 and the flange 102, or to drive the support plate 300 away from the bottom door 101 and the furnace body 100. A second drive assembly is connected to a pressure head 200, which is located on the upper side of the flange 102. The second drive assembly is used to drive the pressure head 200 to move in a direction perpendicular to the flange 102 so as to press the flange 102 and the bottom door 101.

[0036] In this embodiment, the locking device includes at least two sets of locking mechanisms; the at least two sets of locking mechanisms are arranged at intervals along the circumference of the furnace body 100, and each set of locking mechanisms includes a support assembly, a first drive assembly, a second drive assembly, and a pressure head 200; the support assembly includes a support plate 300, which is driven to translate by the first drive assembly so that the support plate 300 is located below the bottom door 101 and the flange 102, or moves the support plate 300 away from the bottom door 101 and the furnace body 100. At the same time, since the pressure head 200 is located above the flange 102, the second drive assembly drives the pressure head 200 to move perpendicular to the flange 102. The furnace body 100 and the bottom door 101 are locked by moving in the direction of 02 to press the flange 102 and the furnace door. When it is necessary to open the furnace body 100 and the bottom door 101, the pressure head 200 is first driven away from the flange 102 by the second drive assembly, and then the support plate 300 is driven away from the furnace body 100 by the first drive assembly, so that the furnace body 100 can be opened. The entire process of locking and opening between the furnace body 100 and the bottom door 101 is very convenient and fully automated. It can effectively prevent the furnace body 100 and the bottom door 101 from being unable to open quickly due to the large friction caused by the use of clamp or bolt flange fixing structure after use.

[0037] Of course, at least two sets of locking mechanisms are provided, symmetrically arranged along the radial direction of the furnace body 100, which can ensure the sealing between the flange 102 and the bottom door 101 of the furnace body 100, that is, ensure the fixation between the flange 102 and the bottom door 101 of the furnace body 100. Optionally, the locking mechanisms can also be set to three, four or more sets, which can be set according to actual usage requirements, and can be evenly arranged along the circumferential interval of the furnace body 100. Its purpose has not deviated from the design concept of this utility model and should fall within the protection scope of this utility model.

[0038] According to one embodiment provided by this utility model, such as Figure 1 As shown, the support assembly also includes a mounting plate 301 and a vertical plate 302. The mounting plate 301 and the support plate 300 are arranged at intervals along the height direction of the furnace body 100. The vertical plate 302 is located between the mounting plate 301 and the support plate 300, and both ends of the vertical plate 302 are connected to the mounting plate 301 and the support plate 300 respectively. The mounting plate 301, the vertical plate 302 and the support plate 300 enclose a receiving space 303. The opening side of the receiving space 303 faces the furnace body 100 and the bottom door 101. The receiving space 303 can accommodate the flange 102 and the end of the bottom door 101.

[0039] In this embodiment, the support assembly also includes a mounting plate 301 and a vertical plate 302. Preferably, the mounting plate 301 and the support plate 300 are arranged parallel to each other and spaced apart. The vertical plate 302 is vertically arranged between the mounting plate 301 and the support plate 300, and both ends of the vertical plate 302 are connected to the mounting plate 301 and the support plate 300 respectively, so that the mounting plate 301, the support plate 300 and the vertical plate 302 can move synchronously. That is, the mounting plate 301, the support plate 300 and the vertical plate 302 form a C-shape, and the opening faces the furnace body 100 and the bottom door 101. At the same time, the inner walls of the three form an accommodating space 303. When the support plate 300 is located below the bottom door 101, the flange 102 of the furnace body 100 and the end of the bottom door 101 can be placed inside the accommodating space 303 so that the pressure head 200 located above the flange 102 can cooperate with the support plate 300 to lock.

[0040] According to one embodiment provided by this utility model, such as Figure 1 As shown, the first drive assembly includes a first hydraulic cylinder 400. The output end of the first hydraulic cylinder 400 is connected to the vertical plate 302. The first hydraulic cylinder 400 can drive the support plate 300 to move closer to or further away from the furnace body 100 and the bottom door 101.

[0041] In this embodiment, the first driving component includes a first hydraulic cylinder 400, the output end of which is connected to the upright plate 302, and the first hydraulic cylinder 400 drives the support plate 300 connected to the upright plate 302.

[0042] Of course, the first hydraulic cylinder 400 can also be replaced by an electric cylinder, a pneumatic cylinder, or a motor and lead screw. The purpose is not different from the design concept of this utility model, and it should be within the protection scope of this utility model.

[0043] According to one embodiment provided by this utility model, such as Figure 1 As shown, the top wall of the mounting plate 301 has a through hole that communicates with the receiving space 303. One end of the pressure head 200 passes through the through hole and is located in the receiving space 303. The pressure head 200 can extend and retract within the through hole to adjust its position inside the receiving space 303.

[0044] In this embodiment, a through hole communicating with the receiving space 303 is provided on the top wall of the mounting plate 301. One end of the pressure head 200 passes through the through hole and is located inside the receiving space 303. The pressure head 200 can extend and retract within the through hole along the height direction. That is, the pressure head 200 can change its length protruding from the receiving space 303 by extending and retracting, which changes the position of the pressure head 200 within the receiving space 303, so as to lock or release the flange 102 of the furnace body 100 and the bottom door 101.

[0045] According to one embodiment provided by this utility model, such as Figure 1 As shown, the second drive assembly includes a second hydraulic cylinder 401, which is located above the mounting plate 301. The output end of the second hydraulic cylinder 401 is connected to the end of the pressure head 200 that is away from the receiving space 303. The second hydraulic cylinder 401 can drive the pressure head 200 to move in a direction perpendicular to the flange 102.

[0046] In this embodiment, the second drive component includes a second hydraulic cylinder 401, which is directly mounted on the top wall of the mounting plate 301. The output end of the second hydraulic cylinder 401 is directly connected to the end of the pressure head 200 that is away from the receiving space 303, and the pressure head 200 is driven by the second hydraulic cylinder 401.

[0047] Of course, the second hydraulic cylinder 401 can also be replaced by an electric cylinder, a pneumatic cylinder, or a motor and lead screw. The purpose of this invention does not deviate from the design concept of this utility model and should be within the protection scope of this utility model.

[0048] According to one embodiment provided by this utility model, such as Figure 1 As shown, the first drive assembly also includes a connecting rod 402, one end of which is connected to the first hydraulic cylinder 400, and the other end is connected to the side wall of the upright plate 302 facing the first hydraulic cylinder 400.

[0049] In this embodiment, the first driving assembly further includes a connecting rod 402, which is disposed between the first hydraulic cylinder 400 and the support plate 300. One end of the connecting rod 402 is connected to the output end of the first hydraulic cylinder 400, and the other end is connected to the side wall of the support plate 300 facing the first hydraulic cylinder 400. The connecting rod 402 and the first hydraulic cylinder 400 cooperate to achieve precise driving of the support plate 300, thereby driving the support plate 300 closer to or away from the furnace body 100.

[0050] According to one embodiment provided by this utility model, such as Figure 1 As shown, the locking mechanism also includes a sliding assembly, which is located below the support plate 300. The first hydraulic cylinder 400 can drive the support plate 300 to move along the extension direction of the sliding assembly.

[0051] Furthermore, the sliding assembly includes a slide rail 500 and a roller 501. The slide rail 500 is located below the support plate 300, and the bottom wall of the support plate 300 is provided with the roller 501. The roller 501 can roll in cooperation with the slide rail 500, and the roller 501 can move along the extension direction of the slide rail 500 to drive the support plate 300 to move synchronously.

[0052] In this embodiment, the sliding assembly includes a slide rail 500 and a roller 501. The slide rail 500 is positioned below the support plate 300, and the roller 501 can roll freely within the slide rail 500. The roller 501 is also connected to the outer bottom wall of the support plate 300. The roller 501 and the slide rail 500 can roll together. The roller 501 rolls along the extension direction of the slide rail 500, thereby driving the support plate 300 to move synchronously. This allows the slide rail 500 to provide good guidance for the movement direction of the support plate 300. In other words, by moving along the extension direction of the slide rail 500, the support plate 300 can accurately move closer to or further away from the furnace body 100 and the bottom door 101.

[0053] According to one embodiment provided by this utility model, such as Figure 1 As shown, the sliding assembly also includes a mounting base 304, which is located on the side of the support plate 300 facing the roller 501, and the roller 501 is mounted on the mounting base 304.

[0054] In this embodiment, in order to ensure the stability of the rolling of the roller 501, a mounting seat 304 is provided on the side of the support plate 300 facing the roller 501. By installing the roller 501 in the mounting seat 304, the connection stability between the roller 501 and the support plate 300 can be guaranteed.

[0055] Of course, the rollers 501 and the mounting bases 304 correspond one-to-one, and the number can be one set, two sets or more, depending on the actual usage requirements. The purpose does not deviate from the design concept of this utility model and should be within the protection scope of this utility model.

[0056] Example 2

[0057] This utility model also provides a vacuum high-pressure furnace, including a furnace body 100, a bottom door 101, a support, a lifting cylinder, and the aforementioned locking device; the furnace body 100 is mounted on the support, the bottom door 101 is located below the furnace body 100, the lower end of the furnace body 100 has an opening, and the opening end of the furnace body 100 forms an outwardly extending flange 102. The top view projection of the furnace body 100 falls on the bottom door 101, the outer bottom wall of the bottom door 101 is provided with casters, the lifting cylinder is connected to the furnace body 100, and the lifting cylinder can drive the furnace body 100 to move along its own height to approach or move away from the bottom door 101.

[0058] In this embodiment, the vacuum high-pressure furnace includes a furnace body 100, a bottom door 101, a support, a lifting cylinder, and a locking device. The support is placed on a fixed surface, and the furnace body 100 is placed on the support. A caster wheel is provided on the outer bottom wall of the bottom door 101, enabling the bottom door 101 to move. The distance between the outer bottom wall of the bottom door 101 and the fixed surface is constant. Therefore, by setting the diameter of the rollers 501 and the caster wheel, when the support plate 300 moves below the bottom door 101, the outer bottom wall of the bottom door 101 can be brought into contact with the upper top wall of the support plate 300, so that the locking mechanism can lock the flange 102 and the bottom door 101. The furnace body 100 can move along its own path by the lifting cylinder. The height is moved to approach or move away from the bottom door 101, so the lifting cylinder and the second cylinder 401 cooperate to lock the flange 102 and the bottom door 101 through the cooperation of the pressure head 200 and the support plate 300, thus completing the locking of the vacuum high-pressure furnace. After the material inside the furnace body 100 is processed, the second cylinder 401 drives the pressure head 200 away from the flange 102, and then the first cylinder 400 drives the support plate 300 away from the furnace body 100 and the bottom door 101. Finally, the lifting cylinder lifts the furnace body 100, and the material inside the furnace body 100 will fall onto the loading platform on the bottom door 101, which can then be taken out. The whole process is fully automated and requires no manual operation, which can improve the efficiency of locking or releasing the furnace body 100 and the bottom door 101.

[0059] Preferably, the top view projection of the furnace body 100 falls on the bottom door 101, meaning that the size of the furnace body 100 is smaller than the size of the bottom door 101. However, for greater convenience and aesthetics, the dimensions of the bottom door 101 and the outer edge of the flange 102 of the furnace body 100 are made to be connected, so that the projection of the outer edge of the flange 102 of the furnace body 100 can coincide with the outer edge of the bottom door 101. This facilitates locking by the door locking device and also enhances the aesthetics.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A locking device for a vacuum high-pressure furnace, the vacuum high-pressure furnace comprising a bottom door (101) and a furnace body (100), the lower end of the furnace body (100) having an opening, the opening end of the furnace body (100) having an outwardly extending flange (102), the top view projection of the furnace body (100) falling on the bottom door (101), characterized in that, The door locking device includes at least two sets of door locking mechanisms; At least two sets of the locking mechanisms are arranged at intervals along the circumference of the furnace body (100), and the locking mechanism includes a support assembly, a first drive assembly, a second drive assembly and a pressure head (200); The support assembly includes a support plate (300), and the first drive assembly is connected to the support plate (300) for driving the support plate (300) to translate so that the support plate (300) is located under the bottom door (101) and the flange (102), or driving the support plate (300) away from the bottom door (101) and the furnace body (100); The second drive assembly is connected to the pressure head (200), which is located on the upper side of the flange (102). The second drive assembly is used to drive the pressure head (200) to move in a direction perpendicular to the flange (102) to press the flange (102) and the bottom door (101).

2. The door locking device according to claim 1, characterized in that, The support assembly further includes a mounting plate (301) and a vertical plate (302). The mounting plate (301) and the support plate (300) are spaced apart along the height direction of the furnace body (100). The vertical plate (302) is located between the mounting plate (301) and the support plate (300), and both ends of the vertical plate (302) are connected to the mounting plate (301) and the support plate (300) respectively. The mounting plate (301), the vertical plate (302), and the support plate (300) enclose a receiving space (303). The opening side of the receiving space (303) faces the furnace body (100) and the bottom door (101). The receiving space (303) can accommodate the flange (102) and the end of the bottom door (101).

3. The door locking device according to claim 2, characterized in that, The first driving component includes a first hydraulic cylinder (400), the output end of which is connected to the vertical plate (302). The first hydraulic cylinder (400) can drive the support plate (300) to move closer to or further away from the furnace body (100) and the bottom door (101).

4. The door locking device according to claim 2, characterized in that, The mounting plate (301) has a through hole on its top wall, which is connected to the receiving space (303). One end of the pressure head (200) passes through the through hole and is located in the receiving space (303). The pressure head (200) can extend and retract within the through hole to adjust its position inside the receiving space (303).

5. The door locking device according to claim 4, characterized in that, The second drive assembly includes a second hydraulic cylinder (401), which is located above the mounting plate (301). The output end of the second hydraulic cylinder (401) is connected to the end of the pressure head (200) away from the receiving space (303). The second hydraulic cylinder (401) can drive the pressure head (200) to move in a direction perpendicular to the flange (102).

6. The door locking device according to claim 3, characterized in that, The first drive assembly also includes a connecting rod (402), one end of which is connected to the first hydraulic cylinder (400), and the other end is connected to the side wall of the upright plate (302) facing the first hydraulic cylinder (400).

7. The door locking device according to claim 3, characterized in that, The locking mechanism also includes a sliding assembly located below the support plate (300), and the first hydraulic cylinder (400) can drive the support plate (300) to move along the extension direction of the sliding assembly.

8. The door locking device according to claim 7, characterized in that, The sliding assembly includes a slide rail (500) and a roller (501). The slide rail (500) is located below the support plate (300). The bottom wall of the support plate (300) is provided with the roller (501). The roller (501) can roll in cooperation with the slide rail (500), and the roller (501) can move along the extension direction of the slide rail (500) to drive the support plate (300) to move synchronously.

9. The door locking device according to claim 8, characterized in that, The sliding assembly further includes a mounting base (304) disposed on the side of the support plate (300) facing the roller (501), and the roller (501) is mounted on the mounting base (304).

10. A vacuum high-pressure furnace, characterized in that, Includes furnace body (100), bottom door (101), bracket, lifting cylinder and door locking device as described in any one of claims 1-9; The furnace body (100) is mounted on the support, and the bottom door (101) is located below the furnace body (100). The lower end of the furnace body (100) has an opening, and the opening end of the furnace body (100) forms an outwardly extending flange (102). The top view projection of the furnace body (100) falls on the bottom door (101). The outer bottom wall of the bottom door (101) is equipped with casters. The lifting cylinder is connected to the furnace body (100), and the lifting cylinder can drive the furnace body (100) to move along its own height to approach or move away from the bottom door (101).

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