Efficient leather vacuum drying machine and working method thereof

Abstract

The application relates to an efficient leather vacuum drying machine and a working method thereof, and relates to the technical field of leather processing equipment; the machine body is provided with a plurality of pairs of closed covers and corresponding working plates which are sequentially and spacedly arranged on the machine body, one side of the machine body is provided with a vacuum device for vacuumizing, an output end of the vacuum device is in communication with each pair of closed covers and working plates, a suction hose is arranged between the output end of the vacuum device and each pair of closed covers and working plates, and a control valve is arranged on each suction hose; an air suction pipe is arranged on the suction hose in communication, and the communication position of the air suction pipe and the suction hose is located on the side of the control valve facing the working plate; an end of the air suction pipe is in communication with a standby tank, an electric control valve is arranged on the air suction pipe, and a suction device for vacuumizing is arranged on the standby tank; the application has the effect of improving the working efficiency of the vacuum drying machine.

Description

Technical Field

[0001] This application relates to the field of leather processing equipment technology, and in particular to a high-efficiency leather vacuum dryer and its working method. Background Technology

[0002] In the leather manufacturing process, the moisture content of leather needs to be reduced from 60%-75% to 16%-18% after wet processing. Currently, tanneries both domestically and internationally generally use the evaporation drying method, which involves first turning the moisture or solvent in the leather into steam, and then removing the steam.

[0003] In related technologies, a leather vacuum dryer includes a frame and multiple sets of working plates that slide vertically. The working plates are used to support leather. The frame is equipped with lifting cylinders for driving each set of working plates to move up and down individually. Each set of working plates has a closed cover on its bottom side wall facing the top of the adjacent working plate to seal the upper surface of the lower working plate, thereby forming a vacuum drying chamber. A fixed cover is installed on the top of the frame to seal and cover the topmost working plate. A heating device for heating the working plates is installed on one side of the frame. A vacuum machine for vacuuming is installed on one side of the frame, and a suction hose is connected to the vacuum machine and the interior of each set of vacuum drying chambers. Each set of suction hoses is equipped with a control valve.

[0004] Regarding the aforementioned technologies, the inventors discovered that during the process of maintaining a stable vacuum level in the already operational vacuum drying chamber for leather vacuum drying, after adding new leather to be processed on the lower working board, the vacuum machine needs to perform a new round of vacuuming in the newly formed vacuum drying chamber to ensure it reaches the predetermined vacuum level. During this new round of vacuuming, to quickly bring the new vacuum drying chamber to the predetermined vacuum level, the vacuum machine's suction capacity is typically increased. However, since all vacuum drying chambers are vacuumed using the same vacuum machine, this new round of vacuuming can easily affect the stability of the vacuum level inside the already operational vacuum drying chamber, thus impacting the efficiency of the leather drying process. Summary of the Invention

[0005] To improve the working efficiency of vacuum dryers, this application provides a high-efficiency leather vacuum dryer and its working method.

[0006] Firstly, this application provides a high-efficiency leather vacuum dryer, which adopts the following technical solution: A high-efficiency leather vacuum dryer includes a body and several pairs of closed covers and corresponding working plates arranged at intervals on the body. A vacuum component for vacuuming is provided on one side of the body. A suction hose is provided between the output end of the vacuum component and each pair of closed covers and working plates. A control valve is provided on each suction hose. An air extraction pipe is provided connected to the suction hose, and the connection between the air extraction pipe and the suction hose is located on the side of the control valve facing the working plate. A preparatory tank is provided at the end of the air extraction pipe. An electrically controlled valve is provided on the air extraction pipe, and a vacuum component for vacuuming is provided on the preparatory tank.

[0007] By adopting the above technical solution, the suction component evacuates the preparation tank in advance during the time when the working plate and the closed cover are gradually merged, so that the preparation tank is in a negative pressure state. This allows the vacuum drying chamber between the merged working plate and the closed cover to be evacuated using the negative pressure state of the preparation tank, which further reduces the time for evacuating the new vacuum drying chamber and improves the efficiency of leather vacuuming. In addition, after the working plate and the closed cover are closed, the new vacuum drying chamber between the working plate and the closed cover is evacuated using the suction device and the negative pressure preparation tank. This ensures that the vacuum level inside the new vacuum drying chamber reaches the predetermined vacuum level. Then, the new vacuum drying chamber between the working plate and the closed cover is connected to the vacuum device, and all vacuum drying chambers are evacuated synchronously at the predetermined vacuum level through the vacuum device. This reduces the impact on the vacuum level inside the already working vacuum drying chambers, ensures the stability of the vacuum level inside the already working vacuum drying chambers, and thus improves the working efficiency of leather vacuum drying.

[0008] Preferably, the machine body is slidably provided with an air duct to guide the airflow toward one side of the working plate, and the machine body is provided with a lifting assembly to drive the air duct to move along the height direction of the machine body.

[0009] By adopting the above technical solution, during the gradual merging of the working plate and the closed cover, the air duct guides the airflow to flow from one side of the working plate and the closed cover. According to Bernoulli's principle, this further reduces the air pressure between the working plate and the closed cover after they are merged, thereby reducing the time required to vacuum the working plate and the closed cover to reach the predetermined value after they are merged, and further improving the efficiency of leather drying. In addition, the lifting assembly can drive the air intake component to move along the height direction of the machine body, so as to facilitate the air intake component to adjust the air pressure between the closed hood and the working plate at different heights.

[0010] Preferably, the lifting assembly includes a lifting screw, a lifting slider, and a lifting motor; the lifting screw is rotatably mounted on the machine body, the lifting screw passes through the lifting slider, the air duct is connected to the lifting slider, and the lifting screw is threadedly connected to the lifting slider; the lifting motor is mounted on the machine body to drive the lifting screw to rotate.

[0011] By adopting the above technical solution, the lifting motor drives the lifting screw to rotate, and the rotating lifting screw drives the lifting slider so that the lifting slider drives the air-drawing component to move along the height direction of the machine body.

[0012] Preferably, a mounting frame is slidably mounted on the work plate, and a turnover assembly is provided on the work plate to drive the mounting frame to move circumferentially along the closed cover; an extension rod is provided on the mounting frame, a drive frame is slidably mounted on the extension rod, and a rolling roller for rolling leather is rotatably mounted on the end of the drive frame away from the extension rod; a camera group for observing the state of the leather is provided on the extension rod, a moving assembly is provided on the extension rod to drive the drive frame to move along the length direction of the extension rod, and a drive assembly is provided on the extension rod to drive the rolling roller to move closer to or away from the work plate.

[0013] By adopting the above technical solution, the camera group can detect the condition of the leather inside the closed cover in real time. The turnover component drives the rolling roller to move around the leather. The drive component adjusts the distance between the rolling roller and the leather on the worktable. The moving component drives the rolling roller to move so that the various parts of the leather can be rolled and flattened in different directions. This reduces the shrinkage of the leather after drying and improves the overall quality of the finished product after drying.

[0014] Preferably, the turnover assembly includes a limiting shaft, a limiting wheel, a driving bevel gear, a fixed gear ring, and a turnover motor; the limiting shaft is rotatably mounted on the bottom of the mounting frame, and the working plate has a mounting ring groove into which the limiting shaft can abut; the limiting wheel is mounted on the limiting shaft, and the mounting ring groove has a turnover ring groove inside for the limiting wheel to rotate; the driving bevel gear is rotatably mounted on the mounting frame, and the fixed gear ring is mounted on the working plate, the fixed gear ring meshes with the driving bevel gear, and the fixed gear ring is coaxial with the mounting ring groove; the turnover motor is mounted on the mounting frame to drive the driving bevel gear to rotate.

[0015] By adopting the above technical solution, the limiting shaft and limiting wheel limit the movement direction of the mounting frame. The rotary motor drives the drive bevel gear to rotate. The rotating drive bevel gear meshes with the fixed gear ring to provide power to the mounting frame, thereby driving the mounting frame to move the rolling roller around the circumference of the leather, thereby adjusting the relative position between the rolling roller and the leather.

[0016] Preferably, the moving component includes a moving block, a moving screw, and a moving motor; the moving block is slidably disposed on the extension rod, the moving screw is rotatably disposed on the extension rod, the moving screw passes through the moving block, and the moving screw is threadedly connected to the moving block; the moving motor is disposed on the extension rod to drive the moving screw to rotate.

[0017] By adopting the above technical solution, the output end of the mobile motor drives the mobile screw to rotate, and the rotating mobile screw drives the mobile block, which in turn drives the drive frame and the rolling roller to move along the length of the extension rod, so that the rolling roller can roll and flatten the leather.

[0018] Preferably, the drive assembly includes a telescopic member and a rotating block; the telescopic member is rotatably mounted on the moving block, the rotating block is rotatably mounted on the drive frame, and the rotating block is connected to the output end of the telescopic member; the telescopic member is used to drive the rotating block closer to or further away from the moving block.

[0019] By adopting the above technical solution, when the output end of the telescopic component extends, it can drive the roller to gradually approach the leather on the work plate so that the roller can roll and flatten the leather. When the output end of the telescopic component retracts, it can cause the roller to gradually detach from the leather so that the roller can disturb the leather during the adjustment of the position of the roller by the turnover component and the moving component. In addition, by adjusting the extension of the telescopic component's output end, the rolling force of the roller on the leather can be adjusted, so as to roll and flatten leather of different thicknesses.

[0020] Preferably, the end of the rolling roller is provided with a brake gear, the drive frame is provided with a brake rack for engaging the brake gear, and a drive member is provided between the drive frame and the rolling roller to drive the brake gear and the brake rack to move in opposite directions.

[0021] By adopting the above technical solution, the driving component drives the roller to engage the brake gear and brake rack to restrict the rotation of the roller. At this time, the roller is driven to press the leather, and the moving component drives the roller to move, thereby pulling the leather to move on the work plate to adjust the position of the leather on the work plate, thereby improving the uniformity of the leather, and thus improving the drying efficiency and finished product quality of the leather.

[0022] Preferably, the driving component includes a sliding block, a guide rod, an elastic element, and an anti-detachment block; the sliding block is disposed at both ends of the rolling roller, the rolling roller is rotatably connected to the sliding block, and the sliding block is slidably connected to the driving frame; the guide rod is disposed on the driving frame, and the guide rod and the sliding block are respectively disposed in a one-to-one correspondence, and each guide rod passes through the corresponding sliding block; the elastic element is disposed between the driving frame and the sliding block, so as to drive the rolling roller closer to the working plate by its own elastic force.

[0023] By adopting the above technical solution, the elastic element uses its own elastic force to drive the rolling roller close to the leather on the work plate, so that the rolling roller can rotate normally and roll the leather. When it is necessary to restrict the rotation of the rolling roller, the continuous extension of the output end of the telescopic element is used to press the rolling roller toward the work plate, so that the elastic element gradually deforms and contracts, causing the rolling roller to gradually drive the brake gear to approach and engage the brake rack, thereby restricting the rotation of the rolling roller and reducing the need for an additional power source.

[0024] Secondly, This application provides a method for operating a high-efficiency leather vacuum dryer, comprising the following steps: Preparatory evacuation: As the working plate and the closed hood gradually merge, close the control valve and the electric control valve, and control the suction component to evacuate the air in the preparation tank. Pre-vacuum: After the working plate and the closed cover are combined, the electric control valve is opened, and the area between the working plate and the closed cover is evacuated using the internal negative pressure preparation tank and suction device. Steady Vacuum: Once the vacuum level between the working plate and the closed cover matches the preset vacuum level of the vacuum component, the electric control valve is closed and the control valve is opened, allowing the vacuum component to steadily evacuate the area between the working plate and the closed cover.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a suction device and a negative pressure pre-emptive tank to evacuate the new vacuum drying chamber between the working plate and the closed hood in advance, the impact on the vacuum degree inside the already working vacuum drying chamber is reduced, ensuring the stability of the vacuum degree inside the already working vacuum drying chamber, thereby improving the working efficiency of leather vacuum drying. 2. By utilizing the time it takes for the working plate and the closing cover to gradually merge, the suction component evacuates the preparation tank in advance, creating a negative pressure inside the preparation tank to quickly evacuate the vacuum drying chamber formed after the subsequent merging. This further reduces the evacuation time of the new vacuum drying chamber and improves the efficiency of leather vacuuming. 3. The camera system observes the drying state of the leather inside the vacuum drying chamber. Through the cooperation of the turnover component, moving component and driving component, the rolling rollers roll and flatten the leather, reducing shrinkage after drying and improving the overall quality of the finished product. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a high-efficiency leather vacuum dryer and its working method according to Embodiment 1 of this application.

[0027] Figure 2 This is a cross-sectional schematic diagram of the connection relationship between the lifting assembly and the induced draft fan in Embodiment 1 of this application.

[0028] Figure 3 This is a schematic diagram of the connection relationship between the working plate and the rolling roller in Embodiment 2 of this application.

[0029] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the working plate in Embodiment 2 of this application.

[0030] Figure 5 This is a schematic diagram of the connection relationship between the rolling roller and the drive frame in Embodiment 2 of this application.

[0031] Explanation of reference numerals in the attached figures: 1. Body; 11. Closed hood; 12. Working plate; 121. Mounting ring groove; 122. Turnover ring groove; 13. Vacuum component; 14. Suction hose; 141. Control valve; 15. Exhaust fan component; 2. Suction pipe; 20. Connecting valve; 21. Preparatory tank; 22. Electrically controlled valve; 23. Suction component; 3. Lifting assembly; 31. Lifting screw; 32. Lifting slider; 33. Lifting motor; 4. Mounting frame; 41. Extension rod; 42. Drive frame; 421. Control... 43. Moving rack; 431. Roller roller; 44. Brake gear; 45. Camera assembly; 56. Turnover assembly; 57. Limiting shaft; 58. Limiting wheel; 59. Drive bevel gear; 50. Fixed gear ring; 51. Turnover motor; 62. Moving assembly; 63. Moving block; 74. Moving screw; 85. Moving motor; 76. Drive assembly; 77. Telescopic component; 78. Rotating block; 89. Drive component; 80. Sliding block; 81. Guide rod; 82. Elastic component; 83. Anti-detachment block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a high-efficiency leather vacuum dryer and its working method to improve the working efficiency of the vacuum dryer.

[0034] Example 1: Reference Figure 1 A high-efficiency leather vacuum dryer includes a body 1 and several pairs of closed covers 11 and working plates 12 slidably mounted on the body 1. All closed covers 11 and working plates 12 are distributed sequentially at intervals along the height direction of the body 1; and a closed cover 11 covering the topmost working plate 12 is installed on the top of the body 1. The closed covers 11 and working plates 12 are respectively arranged in a one-to-one correspondence, and each set of closed covers 11 and its corresponding working plate 12 can be combined to form a vacuum drying chamber for drying leather. In this embodiment, each set of closed covers 11 is a cover with a rectangular cross-section and an internal hollow structure.

[0035] Reference Figure 1 A vacuum unit 13 is installed on the ground on one side of the machine body 1. In this embodiment, the vacuum unit 13 can be an air compressor for evacuation. A suction hose 14 is installed between the output end of the vacuum unit 13 and each set of working plates 12. In this embodiment, each set of working plates 12 has a pipe embedded inside that connects to the corresponding suction hose 14, so that each set of suction hoses 14 is connected to the interior of the vacuum drying chamber corresponding to each set of working plates 12, thereby evacuating the interior of each set of vacuum drying chambers. A control valve 141 is installed on each set of suction hoses 14 to control the closing and unblocking states of the suction hoses 14.

[0036] Reference Figure 1 Each set of suction hoses 14 is detachably connected to a suction pipe 2 via a docking valve 20, and the docking valve 20 is located on the side of the suction hose 14 facing the control valve 141 towards the working plate 12. An electric control valve 22 is installed on the suction pipe 2, and the end of the electric control valve 22 away from the suction pipe 2 is connected to an internally hollow preparation tank 21, and a suction component 23 is connected to the preparation tank 21; in this embodiment, the suction component 23 can be a vacuum pump to evacuate the preparation tank 21 and the inside of the suction pipe 2.

[0037] Reference Figure 1 and Figure 2 An air-guiding component 15 is slidably mounted on the side wall of the machine body 1. In this embodiment, the air-guiding component 15 can be a fan to guide airflow toward one side of the working plate 12. A lifting assembly 3 is installed on the machine body 1 to drive the air-guiding component 15 to move along the height direction of the machine body 1.

[0038] Reference Figure 1 and Figure 2The lifting assembly 3 includes a lifting screw 31, a lifting slider 32, and a lifting motor 33. The lifting screw 31 is rotatably connected to the machine body 1 via a bearing seat, and the length direction of the lifting screw 31 is parallel to the height direction of the machine body 1. The lifting slider 32 is sleeved on the lifting screw 31, and the side wall of the lifting slider 32 is in contact with the side wall of the machine body 1. The lifting slider 32 can slide relative to the machine body 1, and the air duct 15 is fixedly connected to the lifting slider 32. The lifting motor 33 is fixedly connected to the machine body 1, and the output end of the lifting motor 33 is connected to the end of the lifting screw 31 to drive the lifting screw 31 to rotate.

[0039] The implementation principle of a high-efficiency leather vacuum dryer in Embodiment 1 of this application is as follows: During the process of forming a new vacuum drying chamber by closing the cover 11 near the top of the lower working plate 12, the control valve 141 and the electric control valve 22 on the suction hose 14 connected to this working plate 12 are closed, and the suction device 23 is opened to draw air from the preparation tank 21, so that a negative pressure state is formed in the preparation tank 21.

[0040] Once the new vacuum drying chamber is formed, the electric control valve 22 is opened to connect the new vacuum drying chamber with the preparation tank 21. The preparation tank 21, which is in a negative pressure state in advance, evacuates the new vacuum drying chamber and continuously evacuates the new vacuum drying chamber through the suction device 23.

[0041] When the vacuum level inside the new vacuum drying chamber matches the predetermined vacuum level, the electronic control valve 22 is closed and the control valve 141 is opened, so that the new vacuum drying chamber, which is already at the preset vacuum level, is connected to the vacuum machine. This reduces the time consumed by the vacuum machine to re-pump the new vacuum drying chamber to reach the preset vacuum level, and reduces the impact on the vacuum level inside the vacuum drying chamber in other working states, thereby improving the efficiency of leather drying.

[0042] Embodiment 1 of this application also discloses a method for operating a high-efficiency leather vacuum dryer, comprising the following steps: Preparatory evacuation: As the working plate 12 and the closed cover 11 gradually merge, the control valve 141 and the electric control valve 22 are closed, and the suction component 23 is controlled to evacuate the air in the preparation tank 21. Pre-vacuum: After the working plate 12 and the closed cover 11 are combined, the electric control valve 22 is opened, and the internal negative pressure preparation tank 21 and the suction component 23 are used to evacuate the area between the working plate 12 and the closed cover 11, so that the vacuum degree of the area between the working plate 12 and the closed cover 11 gradually approaches the vacuum degree preset by the vacuum component 13. Steady vacuum: When the vacuum level between the working plate 12 and the closed cover 11 is consistent with the preset vacuum level of the vacuum component 13, the electric control valve 22 is closed and the control valve 141 is opened, so that the vacuum component 13 steadily evacuates the area between the working plate 12 and the closed cover 11.

[0043] Example 2: The difference between Example 2 and Example 1 is that: (Refer to...) Figure 3 and Figure 4 A mounting frame 4 is slidably connected to the work plate 12 around the leather. An extension rod 41 is integrally formed on the mounting frame 4, and a camera group 44 is mounted on the extension rod 41. In this embodiment, the camera group 44 can be a camera to allow the staff to observe the state of the leather inside the closed cover 11. A drive frame 42 is slidably mounted on the extension rod 41 along its length. A rolling roller 43 is rotatably connected to the end of the drive frame 42 away from the extension rod 41 for rolling the leather.

[0044] Reference Figure 3 and Figure 4 A turnover assembly 5 is mounted on the working plate 12 to drive the mounting frame 4 to move circumferentially along the closed cover 11. The turnover assembly 5 includes a limiting shaft 51, a limiting wheel 52, a driving bevel gear 53, a fixed gear ring 54, and a turnover motor 55. The limiting shaft 51 is rotatably connected to the bottom of the mounting frame 4, and the working plate 12 has a mounting ring groove 121 for the limiting shaft 51 to abut. The limiting wheel 52 is rotatably connected to the limiting shaft 51, and the inner side wall of the mounting ring groove 121 has a turnover ring groove 122 for the limiting wheel 52 to slide, thereby restricting the rotational movement of the mounting frame 4 along the length direction of the mounting ring groove 121.

[0045] Reference Figure 3 and Figure 4 The fixed gear ring 54 is fixedly connected to the working plate 12, and the central axis of the fixed gear ring 54 is coaxial with the central axis of the mounting ring groove 121. The rotary motor 55 is fixedly connected to the mounting frame 4, and the drive bevel gear 53 is fixedly sleeved on the output end of the rotary motor 55. The drive bevel gear 53 meshes with the fixed gear ring 54, thereby driving the mounting frame 4 to drive the rolling roller 43 to move circumferentially.

[0046] Reference Figure 3 and Figure 4A movable assembly 6 is mounted on the extension rod 41 to drive the drive frame 42 to move along the length of the extension rod 41. The movable assembly 6 includes a movable block 61, a movable screw 62, and a movable motor 63. The movable block 61 is slidably connected to the extension rod 41 along its length and is rotatably connected to the end of the drive frame 42 away from the rolling roller 43. The movable screw 62 is rotatably connected to the extension rod 41, and its length is parallel to that of the extension rod 41. The movable screw 62 passes through the movable block 61 and is threadedly connected to it. The movable motor 63 is fixedly connected to the extension rod 41, and its output end is driven by the movable screw 62 to drive the movable screw 62 to rotate.

[0047] Reference Figure 4 and Figure 5 A drive assembly 7 is mounted on the movable block 61 to drive the roller 43 closer to or away from the work plate 12. The drive assembly 7 includes a telescopic member 71 and a rotating block 72; in this embodiment, the telescopic member 71 may be a telescopic cylinder. The telescopic member 71 is rotatably connected to the movable block 61, and the telescopic member 71 and the drive frame 42 are distributed opposite each other at both ends of the length direction of the movable block 61. The rotating block 72 is fixedly connected to the output end of the telescopic member 71, and the rotating block 72 is rotatably connected to the drive frame 42, so as to drive the roller 43 closer to or away from the work plate 12 by driving the output end of the telescopic member 71 to perform telescopic movement.

[0048] Reference Figure 3 and Figure 5 A brake gear 431 is fixedly sleeved at the end of the rolling roller 43, and a brake rack 421 that meshes with the brake gear 431 is fixedly mounted on the drive frame 42 to restrict the rotation of the rolling roller 43 and the brake gear 431. A drive member 8 is installed between the drive frame 42 and the rolling roller 43 to drive the brake gear 431 to move closer to or away from the brake rack 421.

[0049] Reference Figure 3 and Figure 5 The driving component 8 includes a sliding block 81, a guide rod 82, an elastic element 83, and an anti-detachment block 84. The sliding block 81 is rotatably connected to both ends of the rolling roller 43 along its length. The guide rod 82 slides through each set of sliding blocks 81, and one end of each set of guide rods 82 is fixedly connected to the driving frame 42. The anti-detachment block 84 is fixedly connected to the end of each set of guide rods 82 away from the driving frame 42, and the side wall of the anti-detachment block 84 facing the guide rod 82 can abut against the sliding block 81 to restrict the sliding block 81 from detaching from the guide rod 82.

[0050] Reference Figure 3 and Figure 5In this embodiment, the elastic element 83 can be a spring. The elastic element 83 is sleeved on each set of guide rods 82, and one end of each set of elastic elements 83 abuts against the sliding block 81, and the other end of each set of elastic elements 83 abuts against the drive frame 42, so that the sliding block 81 and the rolling roller 43 are moved toward the work plate 12 by the elastic force of the elastic element 83 itself. When the telescopic member 71 drives the rolling roller 43 to approach the worktable, the rolling roller 43 and the sliding block 81 drive the elastic element 83 to extend and retract, so that the brake gear 431 at the end of the rolling roller 43 gradually approaches the brake rack 421.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency leather vacuum dryer, comprising a body (1) and several pairs of closed covers (11) and corresponding working plates (12) arranged sequentially and spaced apart on the body (1), wherein a vacuum component (13) for vacuuming is provided on one side of the body (1), and a suction hose (14) is provided between the output end of the vacuum component (13) and each pair of closed covers (11) and working plates (12), and a control valve (141) is provided on each suction hose (14); characterized in that: A suction pipe (2) is connected to the suction hose (14), and the connection between the suction pipe (2) and the suction hose (14) is located on the side of the control valve (141) facing the working plate (12); a preparation tank (21) is connected to the end of the suction pipe (2), an electric control valve (22) is provided on the suction pipe (2), and a suction component (23) for vacuuming is connected to the preparation tank (21); A mounting frame (4) is slidably disposed on the working plate (12), and a turnover assembly (5) is disposed on the working plate (12) to drive the mounting frame (4) to move along the circumference of the closed cover (11); an extension rod (41) is disposed on the mounting frame (4), a drive frame (42) is slidably disposed on the extension rod (41), and a rolling roller (43) for rolling leather is rotatably disposed at the end of the drive frame (42) away from the extension rod (41); a camera assembly (44) for observing the state of the leather is disposed on the extension rod (41), a moving assembly (6) is disposed on the extension rod (41) to drive the drive frame (42) to move along the length direction of the extension rod (41), and a drive assembly (7) is disposed on the extension rod (41) to drive the rolling roller (43) to move closer to or away from the working plate (12).

2. The high-efficiency leather vacuum dryer according to claim 1, characterized in that: The body (1) is slidably provided with an air-guiding component (15) that guides the airflow toward the side of the working plate (12), and the body (1) is provided with a lifting assembly (3) that drives the air-guiding component (15) to move along the height direction of the body (1).

3. The high-efficiency leather vacuum dryer according to claim 2, characterized in that: The lifting assembly (3) includes a lifting screw (31), a lifting slider (32), and a lifting motor (33); the lifting screw (31) is rotatably mounted on the body (1), the lifting slider (32) is slidably mounted on the body (1), the lifting screw (31) passes through the lifting slider (32), the air duct (15) is connected to the lifting slider (32), and the lifting screw (31) and the lifting slider (32) are threadedly connected; the lifting motor (33) is mounted on the body (1) to drive the lifting screw (31) to rotate.

4. The high-efficiency leather vacuum dryer according to claim 1, characterized in that: The turnover assembly (5) includes a limiting shaft (51), a limiting wheel (52), a drive bevel gear (53), a fixed gear ring (54), and a turnover motor (55); the limiting shaft (51) is rotatably mounted on the bottom of the mounting frame (4), and the working plate (12) has a mounting ring groove (121) for the limiting shaft (51) to abut in; the limiting wheel (52) is mounted on the limiting shaft (51), and the mounting ring groove (121) has a limiting mechanism inside. The rotating ring groove (122) of the wheel (52) rotates; the driving bevel gear (53) is rotatably mounted on the mounting frame (4), the fixed tooth ring (54) is mounted on the working plate (12), the fixed tooth ring (54) meshes with the driving bevel gear (53), and the fixed tooth ring (54) is coaxially mounted with the mounting ring groove (121); the rotating motor (55) is mounted on the mounting frame (4) to drive the driving bevel gear (53) to rotate.

5. A high-efficiency leather vacuum dryer according to claim 1, characterized in that: The moving component (6) includes a moving block (61), a moving screw (62), and a moving motor (63); the moving block (61) is slidably disposed on the extension rod (41), the moving screw (62) is rotatably disposed on the extension rod (41), the moving screw (62) passes through the moving block (61), and the moving screw (62) is threadedly connected to the moving block (61); the moving motor (63) is disposed on the extension rod (41) for driving the moving screw (62) to rotate.

6. A high-efficiency leather vacuum dryer according to claim 5, characterized in that: The drive assembly (7) includes a telescopic member (71) and a rotating block (72); the telescopic member (71) is rotatably mounted on the moving block (61), and the rotating block (72) is rotatably mounted on the drive frame (42), and the rotating block (72) is connected to the output end of the telescopic member (71). The telescopic member (71) is used to drive the rotating block (72) to move closer to or away from the moving block (61).

7. A high-efficiency leather vacuum dryer according to claim 1, characterized in that: The end of the rolling roller (43) is provided with a brake gear (431), and the drive frame (42) is provided with a brake rack (421) for meshing with the brake gear (431). A drive member (8) is provided between the drive frame (42) and the rolling roller (43) to drive the brake gear (431) and the brake rack (421) to move in opposite directions.

8. A high-efficiency leather vacuum dryer according to claim 7, characterized in that: The driving component (8) includes a sliding block (81), a guide rod (82), an elastic element (83), and an anti-detachment block (84). The sliding block (81) is disposed at both ends of the rolling roller (43), the rolling roller (43) is rotatably connected to the sliding block (81), and the sliding block (81) is slidably connected to the driving frame (42). The guide rod (82) is disposed on the driving frame (42), and the guide rod (82) and the sliding block (81) are respectively disposed in a one-to-one correspondence, and each guide rod (82) passes through the corresponding sliding block (81). The elastic element (83) is disposed between the driving frame (42) and the sliding block (81) to drive the rolling roller (43) closer to the working plate (12) through its own elastic force.

9. A method for operating a high-efficiency leather vacuum dryer as described in any one of claims 1-8, characterized in that: Includes the following steps: Preparatory evacuation: As the working plate (12) and the closed cover (11) gradually merge, close the control valve (141) and the electric control valve (22), and control the suction component (23) to evacuate the air in the preparation tank (21); Pre-vacuum: After the working plate (12) and the closed cover (11) are combined, the electric control valve (22) is opened, and the preparatory tank (21) with internal negative pressure and the suction device (23) are used to evacuate the area between the working plate (12) and the closed cover (11); Steady vacuum: When the vacuum level between the working plate (12) and the closed cover (11) is consistent with the preset vacuum level of the vacuum component (13), the electric control valve (22) is closed and the control valve (141) is opened, so that the vacuum component (13) steadily evacuates the area between the working plate (12) and the closed cover (11).

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