Efficient leather vacuum dryer and working method thereof

Abstract

The invention relates to an efficient leather vacuum drying machine and a working method thereof, and relates to the technical field of leather processing equipment. The device comprises a machine body, a plurality of pairs of closed covers and corresponding working plates, the closed covers and the working plates are arranged on the machine body and sequentially distributed at intervals, a vacuum part used for vacuumizing is arranged on one side of the machine body, suction hoses are arranged between the output end of the vacuum part and each pair of closed cover and working plate in a communicating mode, and a control valve is arranged on each suction hose. The suction hose is provided with a suction pipe in a communicating manner, and the communicating part of the suction pipe and the suction hose is positioned on one side, facing the working plate, of the control valve; the end part of the exhaust pipe is communicated with a preparation tank, the exhaust pipe is provided with an electric control valve, and the preparation tank is communicated with a suction piece for vacuumizing; the vacuum dryer has the effect of improving the working efficiency of the vacuum dryer.

Description

Technical Field

[0001] The present application relates to the technical field of leather processing equipment, and in particular to an efficient leather vacuum dryer and a working method thereof. Background Art

[0002] In the leather manufacturing process, the moisture content of leather needs to be reduced from 60%-75% to 16%-18% after wet processing. At present, tanneries at home and abroad generally use evaporation drying, which is to first convert the moisture or solvent in the leather into steam and then extract the steam.

[0003] In the related art, a leather vacuum dryer includes a frame and multiple groups of working plates slidingly arranged along the vertical direction, the working plates are used to carry leather, and a lifting cylinder is arranged on the frame for driving each group of working plates to perform independent lifting and moving; a closing cover is arranged at the bottom of each group of working plates and at the side wall facing the top of the adjacent working plates, so as to seal and connect the upper surface of the lower working plates to form a vacuum drying chamber, and a fixed cover is installed on the top of the frame to tightly 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 arranged on one side of the frame, and a suction hose is arranged in communication with the vacuum machine and the interior of each group of vacuum drying chambers, and a control valve is arranged on each group of suction hoses.

[0004] With respect to the above-mentioned related technologies, the inventors found that: in the process of the vacuum machine maintaining the working vacuum drying chamber at a stable vacuum degree for the vacuum drying treatment of leather, after the staff adds new leather to be processed on the working plate of the lower layer, the vacuum machine is required to perform a new round of vacuum treatment on the newly formed vacuum drying chamber so that the new vacuum drying chamber reaches a predetermined vacuum degree; in the new round of vacuum treatment, in order to quickly make the new vacuum drying chamber reach the predetermined vacuum degree, it is usually necessary to increase the suction operation capacity of the vacuum machine; and since all the vacuum drying chambers are vacuumed by the same vacuum machine, the stability of the vacuum degree inside the working vacuum drying chamber is easily affected in the new round of vacuum treatment, thereby affecting the working efficiency of leather drying. Summary of the invention

[0005] In order to improve the working efficiency of a vacuum dryer, the present application provides an efficient leather vacuum dryer and a working method thereof.

[0006] In the first aspect, the present application provides an efficient leather vacuum dryer, which adopts the following technical solution: A highly efficient leather vacuum dryer comprises a machine body and a plurality of pairs of closed covers and corresponding working plates which are arranged on the machine body and spaced apart in sequence. A vacuum component for vacuuming is arranged on one side of the machine body, and a suction hose is connected to the output end of the vacuum component and each pair of closed covers and working plates, and a control valve is arranged on each suction hose; an exhaust pipe is connected to the suction hose, and the connection point between the exhaust pipe and the exhaust hose is located on the side of the control valve facing the working plate; a preparatory tank is connected to the end of the exhaust pipe, an electric control valve is arranged on the exhaust pipe, and a suction component for vacuuming is connected to the preparatory tank.

[0007] By adopting the above technical solution, the suction piece evacuates the preparation tank in advance by utilizing the time when the working plate and the closing cover are gradually merged, so that a negative pressure state is formed inside the preparation tank, so that the vacuum drying chamber between the merged working plate and the closing cover can be evacuated by utilizing the preparation tank in the negative pressure state, further reducing the time for evacuating the new vacuum drying chamber and improving the working efficiency of vacuuming the leather; In addition, after the working plate and the closing cover are closed, the new vacuum drying chamber between the working plate and the closing cover is evacuated by using the suction piece and the preparatory tank in the negative pressure state, so that the vacuum degree inside the new vacuum drying chamber reaches a predetermined vacuum degree, and then the new vacuum drying chamber between the working plate and the closing cover is connected to the vacuum piece, and all the vacuum drying chambers are synchronously evacuated under the predetermined vacuum degree state through the vacuum piece. The above reduces the impact on the vacuum degree inside the working vacuum drying chamber, ensures the stability of the vacuum degree inside the working vacuum drying chamber, and thus improves the working efficiency of leather vacuum drying.

[0008] Preferably, an air induction member for guiding the airflow toward one side of the working plate is slidably provided on the machine body, and a lifting assembly for driving the air induction member to move along the height direction of the machine body is provided on the machine body.

[0009] By adopting the above technical solution, during the process of the working plate and the closed cover gradually merging, the air induction member guides the air flow to flow through one side of the working plate and the closed cover. According to the Bernoulli principle, the air pressure between the working plate and the closed cover after merging is further reduced, thereby reducing the time for vacuuming to reach a predetermined value after the working plate and the closed cover are merged, and further improving the working efficiency of leather drying. In addition, the lifting assembly can drive the air inducing member to move along the height direction of the machine body, so that the air inducing member can adjust the air pressure between the closed cover and the working plate at different height states.

[0010] Preferably, the lifting assembly includes a lifting screw, a lifting slider and a lifting motor; the lifting screw is rotatably arranged on the machine body, the lifting screw passes through the lifting slider, the air induced member is connected to the lifting slider, and the lifting screw is threadedly connected to the lifting slider; the lifting motor is arranged 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 inducing member to move along the height direction of the machine body.

[0012] Preferably, a mounting frame is slidably provided on the working plate, and a rotating component for driving the mounting frame to move along the circumference of the closing cover is provided on the working plate; an extension rod is provided on the mounting frame, and a driving frame is slidably provided on the extension rod, and a rolling roller for rolling leather is rotatably provided on the end of the driving frame away from the extension rod; a camera group for observing the state of the leather is provided on the extension rod, a moving component for driving the driving frame to move along the length direction of the extension rod is provided on the extension rod, and a driving component for driving the rolling roller to approach or move away from the working plate is provided on the extension rod.

[0013] By adopting the above technical solution, the camera group detects the state of the leather inside the closed cover in real time, the turnover component drives the rolling roller to move around the leather, the driving component adjusts the distance between the rolling roller and the leather on the workbench, and drives the rolling roller to move through the moving component, so as to roll and flatten various parts of the leather in different directions, thereby reducing the shrinkage of the leather after drying and improving the overall quality of the finished product after the leather is dried.

[0014] Preferably, the circulating assembly includes a limit shaft, a limit wheel, a driving bevel gear, a fixed gear ring and a circulating motor; the limit shaft is rotatably arranged at the bottom of the mounting frame, the working plate is provided with a mounting ring groove for the limit shaft to be inserted into, the limit wheel is arranged on the limit shaft, and a circulating ring groove for the limit wheel to rotate is provided inside the mounting ring groove; the driving bevel gear is rotatably arranged on the mounting frame, the fixed gear ring is arranged on the working plate, the fixed gear ring is meshed with the driving bevel gear, and the fixed gear ring is coaxially arranged with the mounting ring groove; the circulating motor is arranged on the mounting frame to drive the driving bevel gear to rotate.

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

[0016] Preferably, the moving assembly includes a moving block, a moving screw and a moving motor; the moving block is slidably arranged on the extension rod, the moving screw is rotatably arranged 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 arranged 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 can drive the mobile block to drive the driving frame and the rolling roller to move along the length direction of the extension rod, so that the rolling roller can roll and flatten the leather.

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

[0019] By adopting the above technical solution, when the output end of the telescopic member is extended, the rolling roller can be driven to gradually approach the leather on the working plate, so that the rolling roller can roll and flatten the leather; when the output end of the telescopic member is retracted, the rolling roller can be gradually separated from the leather, so that the rolling roller can cause disturbance to the leather during the process of adjusting the position of the rolling roller by the turnover component and the moving component; In addition, by adjusting the extension degree of the output end of the telescopic member, the rolling force of the rolling roller on the leather can be adjusted, so as to roll and flatten leather in different thickness states.

[0020] Preferably, a brake gear is provided at the end of the rolling roller, a brake rack for engaging the brake gear is provided on the driving frame, and a driving member for driving the brake gear and the brake rack to move toward each other is provided between the driving frame and the rolling roller.

[0021] By adopting the above technical solution, the driving member drives the rolling roller to drive the brake gear and the brake rack to engage with each other to limit the rotation of the rolling roller; at this time, the rolling roller is driven to press the leather, and in the process of using the moving component to drive the rolling roller to move, the leather is pulled to move on the working plate to adjust the position of the leather on the working plate, thereby improving the uniformity of the leather, and then improving the drying efficiency of the leather and the quality of the finished product.

[0022] Preferably, the driving member includes a sliding block, a guide rod, an elastic member and an anti-slip block; the sliding blocks are arranged at both ends of the rolling roller, the rolling roller is rotatably connected to the sliding blocks, and the sliding blocks are slidably connected to the driving frame; the guide rod is arranged on the driving frame, the guide rods and the sliding blocks are respectively arranged in a one-to-one correspondence, and each of the guide rods passes through the corresponding sliding block, and the elastic member is arranged between the driving frame and the sliding block to drive the rolling roller close to the working plate through its own elastic force.

[0023] By adopting the above technical solution, the elastic member uses its own elastic force to drive the rolling roller close to the leather on the working plate, so that the rolling roller can rotate normally and roll the leather; when it is necessary to limit the rotation of the rolling roller, the output end of the telescopic member is continuously extended to press the rolling roller toward the working plate, so that the elastic member gradually deforms and contracts, so that the rolling roller gradually drives the brake gear to approach and engage the brake rack, thereby limiting the rotation of the rolling roller and reducing the need to set up an additional power source.

[0024] Second, The present application provides a working method of an efficient leather vacuum dryer, comprising the following steps: Preparatory vacuuming: When the working plate and the closing cover are gradually merged, the control valve and the electric control valve are closed, and the suction piece is controlled to vacuum the air in the preparatory tank; Pre-vacuum: After the working plate and the closing cover are combined, the electric control valve is opened, and the area between the working plate and the closing cover is vacuumed by using the internal negative pressure preparation tank and the suction piece; Steady vacuum: When the vacuum degree between the working plate and the closing cover is consistent with the vacuum degree preset by the vacuum component, close the electric control valve and open the control valve, so that the vacuum component can steadily evacuate the area between the working plate and the closing cover.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the suction piece and the preparatory tank in the negative pressure state, the new vacuum drying chamber between the working plate and the closing cover is evacuated in advance, which reduces the impact on the vacuum degree inside the working vacuum drying chamber, ensures the stability of the vacuum degree inside the working vacuum drying chamber, and thus improves the working efficiency of leather vacuum drying; 2. By utilizing the time when the working plate and the closing cover are gradually merged, the suction piece evacuates the preparatory tank in advance, so that a negative pressure state is formed inside the preparatory tank to quickly evacuate the vacuum drying chamber formed after the subsequent merging, further reducing the time for evacuating the new vacuum drying chamber and improving the work efficiency of leather vacuuming; 3. The drying state of the leather inside the vacuum drying chamber is observed by the camera group, and the turnover assembly, the moving assembly and the driving assembly cooperate with each other so that the rolling roller rolls and flattens the leather, which reduces the shrinkage of the leather after drying and improves the overall quality of the finished product after drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an efficient leather vacuum dryer and its working method in Example 1 of the present application.

[0027] Figure 2 It is a cross-sectional schematic diagram of the connection relationship between the lifting assembly and the induced draft fan of Example 1 of the present application.

[0028] Figure 3 It is a structural schematic diagram of the connection relationship between the working plate and the rolling roller in Example 2 of the present application.

[0029] Figure 4 It is a cross-sectional schematic diagram of the internal structure of the working plate of Example 2 of the present application.

[0030] Figure 5 It is a structural schematic diagram of the connection relationship between the rolling roller and the driving frame of Example 2 of the present application.

[0031] Description of reference numerals: 1. Machine body; 11. Closing cover; 12. Working plate; 121. Mounting ring groove; 122. Circumferential ring groove; 13. Vacuum parts; 14. Suction hose; 141. Control valve; 15. Air induction parts; 2. Suction pipe; 20. Docking valve; 21. Preparation tank; 22. Electric control valve; 23. Suction parts; 3. Lifting assembly; 31. Lifting screw; 32. Lifting slider; 33. Lifting motor; 4. Mounting frame; 41. Extension rod; 42. Driving frame; 421. System Moving rack; 43, rolling roller; 431, brake gear; 44, camera group; 5, circulating assembly; 51, limiting shaft; 52, limiting wheel; 53, driving bevel gear; 54, fixed gear ring; 55, circulating motor; 6, moving assembly; 61, moving block; 62, moving screw; 63, moving motor; 7, driving assembly; 71, telescopic part; 72, rotating block; 8, driving part; 81, sliding block; 82, guide rod; 83, elastic part; 84, anti-slip block. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses an efficient leather vacuum dryer and a working method thereof, so as to improve the working efficiency of the vacuum dryer.

[0034] Embodiment 1: Reference Figure 1 A highly efficient leather vacuum dryer comprises a machine body 1 and a plurality of pairs of closed covers 11 and working plates 12 slidably mounted on the machine body 1, all of which are spaced in sequence along the height direction of the machine body 1; and a closed cover 11 covering the topmost working plate 12 is mounted on the top of the machine body 1. The closed covers 11 and the working plates 12 are arranged one by one, and each set of closed covers 11 and its corresponding working plates 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 hollow interior and a rectangular cross section.

[0035] Reference Figure 1 A vacuum component 13 is installed on the ground on one side of the machine body 1. In this embodiment, the vacuum component 13 can be an air compressor for vacuuming. A suction hose 14 is installed between the output end of the vacuum component 13 and each group of working plates 12. In this embodiment, each group of working plates 12 is embedded with a pipe connected to the corresponding suction hose 14, so that each group of suction hoses 14 is connected to the inside of the vacuum drying chamber corresponding to each group of working plates 12, so as to vacuum the inside of each group of vacuum drying chambers. A control valve 141 is installed on each group of suction hoses 14 to control the closed and unblocked state of the suction hoses 14.

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

[0037] Reference Figure 1 and Figure 2 A draft member 15 is slidably mounted on the side wall of the machine body 1. In this embodiment, the draft member 15 may be a draft fan for guiding the airflow to flow toward one side of the working plate 12. A lifting assembly 3 is mounted on the machine body 1 for driving the draft member 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 through 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 inducing member 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 drivingly connected to the end of the lifting screw 31 to drive the lifting screw 31 to rotate.

[0039] The implementation principle of an efficient leather vacuum dryer in Example 1 of the present application is: When the lower working plate 12 is close to the closing cover 11 on its top to form a new vacuum drying chamber, the control valve 141 and the electric control valve 22 on the suction hose 14 connected to the working plate 12 are closed, and the suction piece 23 is opened to suck the air inside the preparation tank 21, so that a negative pressure state is formed in the preparation tank 21.

[0040] When 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 piece 23.

[0041] When the vacuum degree inside the new vacuum drying chamber is consistent with the preset vacuum degree, the electric 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 degree is connected to the vacuum machine, thereby reducing the time consumed by the vacuum machine to re-suction the new vacuum drying chamber to reach the preset vacuum degree, reducing the impact on the vacuum degree inside the vacuum drying chamber in other working states, thereby improving the work efficiency of leather drying.

[0042] Embodiment 1 of the present application also discloses a working method of an efficient leather vacuum dryer, comprising the following steps: Preparatory air extraction: during the process of the working plate 12 and the closing cover 11 gradually merging, the control valve 141 and the electric control valve 22 are closed, and the suction member 23 is controlled to vacuum the air in the preparatory tank 21; Pre-vacuum: After the working plate 12 and the closing cover 11 are combined, the electric control valve 22 is opened, and the area between the working plate 12 and the closing cover 11 is evacuated by using the preparation tank 21 with internal negative pressure and the suction member 23, so that the vacuum degree of the area between the working plate 12 and the closing cover 11 gradually approaches the vacuum degree preset by the vacuum member 13; Steady vacuum: When the vacuum degree between the working plate 12 and the closing cover 11 is consistent with the preset vacuum degree 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 closing cover 11.

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

[0044] Reference Figure 3 and Figure 4 , a revolving assembly 5 is installed on the working plate 12, which is used to drive the mounting frame 4 to move along the circumference of the closed cover 11. The revolving assembly 5 includes a limiting shaft 51, a limiting wheel 52, a driving bevel gear 53, a fixed gear ring 54 and a revolving motor 55; the limiting shaft 51 is rotatably connected to the bottom of the mounting frame 4, and a mounting ring groove 121 is provided on the working plate 12 for the limiting shaft 51 to be inserted. The limiting wheel 52 is rotatably connected to the limiting shaft 51, and the inner side wall of the mounting ring groove 121 is provided with a revolving ring groove 122 for the limiting wheel 52 to slide, so as to limit the mounting frame 4 to revolve 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 epicyclic motor 55 is fixedly connected to the mounting frame 4, the driving bevel gear 53 is fixedly sleeved on the output end of the epicyclic motor 55, and the driving bevel gear 53 and the fixed gear ring 54 are meshed with each other, thereby driving the mounting frame 4 to drive the rolling roller 43 to move circumferentially.

[0046] Reference Figure 3 and Figure 4, a moving assembly 6 is installed on the extension rod 41 to drive the driving frame 42 to move along the length direction of the extension rod 41. The moving assembly 6 includes a moving block 61, a moving screw 62 and a moving motor 63; the moving block 61 is slidably connected to the extension rod 41 along the length direction of the extension rod 41, and the moving block 61 is rotationally connected to the end of the driving frame 42 away from the rolling roller 43. The moving screw 62 is rotationally connected to the extension rod 41, and the length direction of the moving screw 62 is parallel to the length direction of 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 fixedly connected to the extension rod 41, and the output end of the moving motor 63 is transmission-connected to the moving screw 62 to drive the moving screw 62 to rotate.

[0047] Reference Figure 4 and Figure 5 , a driving assembly 7 is installed on the moving block 61 to drive the rolling roller 43 to move closer to or away from the working plate 12. The driving assembly 7 includes a telescopic member 71 and a rotating block 72; in this embodiment, the telescopic member 71 can be a telescopic cylinder. The telescopic member 71 is rotatably connected to the moving block 61, and the telescopic member 71 and the driving frame 42 are relatively distributed at both ends of the length direction of the moving 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 driving frame 42, so as to drive the output end of the telescopic member 71 to perform a telescopic movement, thereby driving the rolling roller 43 closer to or away from the working plate 12.

[0048] Reference Figure 3 and Figure 5 The end of the rolling roller 43 is fixedly sleeved with a brake gear 431, and the driving frame 42 is fixedly mounted with a brake rack 421 that is adapted and meshed with the brake gear 431 to limit the rotation of the rolling roller 43 and the brake gear 431. A driving member 8 is installed between the driving frame 42 and the rolling roller 43 to drive the brake gear 431 to approach or move away from the brake rack 421.

[0049] Reference Figure 3 and Figure 5 The driving member 8 includes a sliding block 81, a guide rod 82, an elastic member 83 and an anti-slip block 84; the sliding block 81 is rotatably connected to both ends of the rolling roller 43 in the length direction, the guide rod 82 is slidably inserted into each group of sliding blocks 81, and one end of each group of guide rods 82 is fixedly connected to the driving frame 42; the anti-slip block 84 is fixedly connected to the end of each group of guide rods 82 away from the driving frame 42, and the side wall of the anti-slip block 84 facing the guide rod 82 can be against the sliding block 81 to limit the sliding block 81 from separating from the guide rod 82.

[0050] Reference Figure 3 and Figure 5In this embodiment, the elastic member 83 can be a spring. The elastic member 83 is sleeved on each set of guide rods 82, and one end of each set of elastic members 83 abuts against the sliding block 81, and the other end of each set of elastic members 83 abuts against the driving frame 42, so that the sliding block 81 and the rolling roller 43 are driven to move toward the direction close to the working plate 12 by the elastic force of the elastic member 83 itself. When the telescopic member 71 drives the rolling roller 43 to approach the workbench, the rolling roller 43 and the sliding block 81 drive the elastic member 83 to expand and contract, 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 the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An efficient leather vacuum dryer, comprising a machine body (1) and a plurality of pairs of closed covers (11) and corresponding working plates (12) arranged on the machine body (1) and spaced apart in sequence, a vacuum member (13) for vacuuming is arranged on one side of the machine body (1), a suction hose (14) is arranged between the output end of the vacuum member (13) and each pair of closed covers (11) and the working plate (12), and each suction hose (14) is provided with a control valve (141); characterized in that: The suction hose (14) is connected to an exhaust pipe (2), and the connection point between the exhaust pipe (2) and the suction hose (14) is located on the side of the control valve (141) facing the working plate (12); the end of the exhaust pipe (2) is connected to a preparatory tank (21), the exhaust pipe (2) is provided with an electric control valve (22), and the preparatory tank (21) is connected to a suction piece (23) for vacuuming.

2. The efficient leather vacuum dryer according to claim 1, characterized in that: The machine body (1) is slidably provided with an air induction member (15) for guiding the air flow toward one side of the working plate (12), and the machine body (1) is provided with a lifting assembly (3) for driving the air induction member (15) to move along the height direction of the machine body (1).

3. The efficient leather vacuum dryer according to claim 2, characterized in that: The lifting assembly (3) comprises a lifting screw (31), a lifting slider (32) and a lifting motor (33); the lifting screw (31) is rotatably arranged on the machine body (1), the lifting slider (32) is slidably arranged on the machine body (1), the lifting screw (31) passes through the lifting slider (32), the air inducing member (15) is connected to the lifting slider (32), and the lifting screw (31) is threadedly connected to the lifting slider (32); the lifting motor (33) is arranged on the machine body (1) to drive the lifting screw (31) to rotate.

4. The efficient leather vacuum dryer according to claim 1, characterized in that: A mounting frame (4) is slidably arranged on the working plate (12), and a circumferential assembly (5) is arranged on the working plate (12) for driving the mounting frame (4) to move along the circumference of the closing cover (11); an extension rod (41) is arranged on the mounting frame (4), and a driving frame (42) is slidably arranged on the extension rod (41), and a rolling roller (43) for rolling leather is rotatably arranged at the end of the driving frame (42) away from the extension rod (41); a camera group (44) for observing the state of leather is arranged on the extension rod (41), a moving assembly (6) is arranged on the extension rod (41) for driving the driving frame (42) to move along the length direction of the extension rod (41), and a driving assembly (7) is arranged on the extension rod (41) for driving the rolling roller (43) to approach or move away from the working plate (12).

5. The efficient leather vacuum dryer according to claim 4, characterized in that: The cyclic assembly (5) comprises a limiting shaft (51), a limiting wheel (52), a driving bevel gear (53), a fixed gear ring (54) and a cyclic motor (55); the limiting shaft (51) is rotatably arranged at the bottom of the mounting frame (4); the working plate (12) is provided with a mounting ring groove (121) for the limiting shaft (51) to be inserted into; the limiting wheel (52) is arranged on the limiting shaft (51), and the mounting ring groove (121) is provided with a limiting ring groove (121) for the limiting shaft (51) to be inserted into. The drive bevel gear (53) is rotatably mounted on the mounting frame (4); the fixed gear ring (54) is mounted on the working plate (12); the fixed gear ring (54) and the drive bevel gear (53) are meshed with each other, and the fixed gear ring (54) and the mounting ring groove (121) are coaxially arranged; the epicyclic motor (55) is arranged on the mounting frame (4) to drive the drive bevel gear (53) to rotate.

6. The efficient leather vacuum dryer according to claim 4, characterized in that: The moving assembly (6) comprises a moving block (61), a moving screw (62) and a moving motor (63); the moving block (61) is slidably arranged on the extension rod (41), the moving screw (62) is rotatably arranged 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 arranged on the extension rod (41) to drive the moving screw (62) to rotate.

7. The efficient leather vacuum dryer according to claim 6, characterized in that: The driving assembly (7) comprises a telescopic member (71) and a rotating block (72); the telescopic member (71) is rotatably disposed on the moving block (61), the rotating block (72) is rotatably disposed on the driving 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 approach or move away from the moving block (61).

8. The efficient leather vacuum dryer according to claim 4, characterized in that: A brake gear (431) is disposed at the end of the rolling roller (43), a brake rack (421) for meshing with the brake gear (431) is disposed on the driving frame (42), and a driving member (8) for driving the brake gear (431) and the brake rack (421) to move toward each other is disposed between the driving frame (42) and the rolling roller (43).

9. The efficient leather vacuum dryer according to claim 8, characterized in that: The driving member (8) comprises a sliding block (81), a guide rod (82), an elastic member (83) and an anti-slip block (84); the sliding block (81) is arranged 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 arranged on the driving frame (42), the guide rod (82) and the sliding block (81) are respectively arranged one by one, and each of the guide rods (82) passes through the corresponding sliding block (81), and the elastic member (83) is arranged between the driving frame (42) and the sliding block (81) to drive the rolling roller (43) close to the working plate (12) through its own elastic force.

10. A working method of the efficient leather vacuum dryer according to any one of claims 1 to 9, characterized in that: The steps include: Preparatory air extraction: during the process of the working plate (12) and the closing cover (11) gradually merging, the control valve (141) and the electric control valve (22) are closed, and the suction member (23) is controlled to evacuate the air in the preparatory tank (21); Pre-vacuuming: After the working plate (12) and the closing cover (11) are combined, the electric control valve (22) is opened, and the area between the working plate (12) and the closing cover (11) is evacuated by using the preparation tank (21) with internal negative pressure and the suction piece (23); Steady vacuum: When the vacuum degree between the working plate (12) and the closing cover (11) is consistent with the preset vacuum degree 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 closing cover (11).

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