Leather vacuum drying machine
By using a vacuum dryer to rapidly evaporate moisture from leather at low temperatures, combined with sealed rollers and a conveyor belt, the problems of high energy consumption and high-temperature damage in traditional leather drying are solved, achieving efficient and low-energy leather drying.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HONGBEN LEATHER CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional leather drying methods are energy-intensive and the high temperatures can cause the leather surface to harden or deform, increasing manufacturing costs and damaging the leather.
A vacuum dryer is used, which lowers the boiling point of water by using a vacuum pump and combines it with a heater to quickly evaporate water at low temperature. At the same time, sealed rollers and conveyor belts are used to prevent air circulation and reduce energy consumption.
It achieves rapid drying at low temperatures, avoids damage to the leather, reduces energy consumption, and improves drying efficiency.
Smart Images
Figure CN224243111U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of leather production and processing technology, and in particular to a leather vacuum dryer. Background Technology
[0002] During leather processing, the split, wet leather needs to be dried to remove excess moisture, making it easier for subsequent processing. Traditional drying methods include natural air drying, hot air drying, and oven drying.
[0003] A search revealed Chinese patent publication number CN221501133U, which discloses a leather dryer for leather production. The dryer includes a body with a conveyor mechanism fixedly connected inside. A drying assembly is also located inside the body. The drying assembly includes a heater and a motor, with the heater fixedly connected to the inner bottom wall of the body. In this leather dryer, when the leather is being dried, the conveyor mechanism is activated to rotate, placing the leather on top. The motor then drives a threaded rod to rotate, causing the two fixed plates connected by a sleeve to move vertically, driven by a limit rod. This causes the two rollers on the bottom plate of the adjusting plate to press the leather firmly. At this point, the control unit is activated, and the heating plate heats the top of the leather, while the bottom plate, through the heater, discharges hot air through the outlet of the diverter plate, drying the bottom of the leather, thus achieving a dual drying effect.
[0004] While the aforementioned devices are capable, hot air drying and oven drying consume a lot of energy during the leather drying process, and can easily cause the leather surface to harden or deform, thereby increasing manufacturing costs and damaging the leather. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a leather vacuum dryer, which aims to solve the problems of high energy consumption and damage to leather caused by high temperature in traditional drying methods.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a leather vacuum dryer, comprising a vacuum drying chamber, a base fixedly connected between the front and rear sides of the inner wall of the vacuum drying chamber, a conveyor belt fixedly connected to the bottom of the inner wall of the base, heaters fixedly connected to both the front and rear sides of the inner wall of the vacuum drying chamber, a vacuum pump fixedly connected to the top of the inner wall of the vacuum drying chamber, an exhaust pipe fixedly connected to the bottom of the vacuum pump, an observation window fixedly connected to the top of the vacuum drying chamber, multiple grooves formed on the top of the inner wall of the vacuum drying chamber, drain pipes fixedly connected to the four corners of the inner wall of the vacuum drying chamber, filters provided on the top of each of the four drain pipes, an operation panel fixedly connected to the front of the vacuum drying chamber, a main controller fixedly connected to the rear of the operation panel, and adaptation components provided on the inner wall of the vacuum drying chamber.
[0007] The above technical solution involves installing a vacuum pump in the vacuum drying chamber, which significantly lowers the boiling point of water. Combined with a heater, this allows the moisture in the leather to evaporate rapidly at a relatively low temperature, thus accelerating the drying process. This also avoids damage to the leather quality caused by high temperatures. Furthermore, the condensate is discharged from the drying chamber through grooves and pipes, preventing the accumulation of condensate in the vacuum drying chamber and ensuring the drying effect and normal operation of the equipment.
[0008] As a further description of the above technical solution: the adaptation component includes two mounting slots, which are opened at the top of the left and right sides of the vacuum drying chamber. Two telescopic rods and two springs are fixedly connected to the top of the inner wall of each of the two mounting slots. Sealing strips are fixedly connected to the bottom of each of the two adjacent telescopic rods. Two connecting pieces are fixedly connected to the front and rear sides of the vacuum drying chamber. Rollers are rotatably connected between the two adjacent connecting pieces.
[0009] The above technical solution involves installing rollers and sealing strips at both the inlet and outlet of the vacuum drying chamber, ensuring the chamber remains sealed. As the conveyor belt carries the leather in, the rollers roll over the leather and rise according to its height before quickly returning to their original position. This achieves self-adaptation to the leather and continuous sealing of the vacuum drying chamber, preventing energy consumption caused by increased negative pressure maintenance due to air circulation between the vacuum drying chamber and the outside air during leather transport caused by the inlet and outlet.
[0010] As a further description of the above technical solution: the bottom of the observation window extends through and to the top of the inner wall of the vacuum drying chamber, and the observation window is used to monitor the drying process.
[0011] The above technical solution, by setting an observation window at the top of the vacuum drying chamber, in conjunction with the main controller and operation panel, helps to promptly identify problems in the operation of the equipment, so as to carry out maintenance and repair and ensure the normal operation of the equipment.
[0012] As a further description of the above technical solution: the top corner of the inner wall of the vacuum drying chamber is arc-shaped, and water vapor inside the vacuum drying chamber condenses in the groove at the top of the vacuum drying chamber.
[0013] Through the above technical solution: in the vacuum drying chamber, the moisture in the leather evaporates into water vapor under the action of vacuum and heating. Since the temperature at the top of the drying chamber is relatively low, the water vapor will condense into liquid water after cooling, thus forming condensate in the groove.
[0014] As a further description of the above technical solution: the groove extends to the four corners of the inner wall of the vacuum drying chamber, the groove is tightly fitted with the drain pipe, and the drain pipe is tightly fitted with the filter screen.
[0015] Through the above technical solution: after the condensate condenses in the groove, it is guided by the groove to the four corners of the inner wall of the vacuum drying chamber, where it will collect at the top of the drain pipe, and after filtration, it will flow into the drain pipe.
[0016] As a further description of the above technical solution: the bottom of the drain pipe extends through and to the outer surface of the vacuum drying chamber, and the drain pipe is used to drain moisture from the leather.
[0017] The above technical solution involves the condensate flowing through a drain pipe to the outside of the vacuum drying chamber. Other components are installed outside the drain pipe to collect the condensate, thereby maintaining the dryness inside the vacuum drying chamber.
[0018] As a further description of the above technical solution: the roller can move up and down in the connector, and the sealing strip is slidably connected to the mounting groove.
[0019] The above technical solution works as follows: when the roller passes over the protrusion, it moves upward on the connector while rolling, and the sealing strip is pushed upward by the roller. When the roller falls, it moves downward by the spring force and returns to its original position.
[0020] As a further description of the above technical solution: the roller is in close contact with the conveyor belt, and the roller is in close contact with the sealing strip.
[0021] Through the above technical solution, due to the tight fit between the sealing strip, roller and conveyor belt, the inlet and outlet of the vacuum drying chamber are largely sealed during the leather conveying process, preventing excessive energy consumption of the vacuum pump due to excessive air flow.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, by setting a vacuum pump and a heater in a vacuum drying chamber, the boiling point of water is lowered by the vacuum environment. Combined with the heat provided by the heater, the moisture in the leather evaporates quickly. The evaporated moisture is then treated by a condensation and drainage system. At the same time, the leather is continuously dried by a conveyor belt, which solves the problems of high energy consumption and damage to leather caused by high temperature in traditional drying methods.
[0024] 2. In this utility model, by setting a sealing strip roller that can move up and down at the inlet and outlet of the vacuum drying chamber, air circulation between the vacuum drying chamber and the outside is prevented. When the conveyor belt conveys the leather into the vacuum drying chamber, the roller is lifted up while rolling through the thickness of the leather, and then falls down quickly. This solves the problem of high energy consumption in maintaining negative pressure due to the conveyor opening during the leather conveying process. Attached Figure Description
[0025] Figure 1 This is a perspective view of a leather vacuum dryer proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the vacuum pump for a leather vacuum dryer proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the drain pipe of a leather vacuum dryer proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the rollers in a leather vacuum dryer proposed in this utility model.
[0029] Legend:
[0030] 1. Vacuum drying chamber; 2. Base; 3. Conveyor belt; 4. Vacuum pump; 5. Evacuation pipe; 6. Heater; 7. Observation window; 8. Main controller; 9. Operation panel; 10. Groove; 11. Drain pipe; 12. Filter screen; 13. Adaptive components; 1301. Mounting slot; 1302. Telescopic rod; 1303. Spring; 1304. Sealing strip; 1305. Roller; 1306. Connector. Detailed Implementation
[0031] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and 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] Reference Figures 1-3 An embodiment of this utility model provides a leather vacuum dryer, comprising a vacuum drying chamber 1, a base 2 fixedly connected between the front and rear sides of the inner wall of the vacuum drying chamber 1, a conveyor belt 3 fixedly connected to the bottom of the inner wall of the base 2, heaters 6 fixedly connected to both the front and rear sides of the inner wall of the vacuum drying chamber 1, a vacuum pump 4 fixedly connected to the top of the inner wall of the vacuum drying chamber 1, an exhaust pipe 5 fixedly connected to the bottom of the vacuum pump 4, an observation window 7 fixedly connected to the top of the vacuum drying chamber 1, multiple grooves 10 formed on the top of the inner wall of the vacuum drying chamber 1, drain pipes 11 fixedly connected to the four corners of the inner wall of the vacuum drying chamber 1, filters 12 provided on the top of each of the four drain pipes 11, an operation screen 9 fixedly connected to the front of the vacuum drying chamber 1, a main controller 8 fixedly connected to the rear of the operation screen 9, and an adaptation component 13 provided on the inner wall of the vacuum drying chamber 1.
[0033] Specifically, during operation, wet leather enters the vacuum drying chamber 1 via conveyor belt 3. Vacuum pump 4 is connected to vacuum drying chamber 1 through pipes. After starting, it continuously extracts air from the drying chamber, gradually reducing the air pressure and creating a negative pressure vacuum environment. During the conveying of wet leather, heaters 6 on both sides of conveyor belt 3 are activated to provide uniform heat and continuously bake the leather. Because the boiling point of water is significantly reduced in a vacuum environment, the moisture in the leather can evaporate quickly at a relatively low temperature, thereby accelerating the drying speed and avoiding damage to the leather quality caused by high temperature. The moisture in the leather evaporates at low temperature, and the evaporated water vapor rises to the top of vacuum drying chamber 1, forming condensate in groove 10. The condensate is collected by drain pipe 11 and discharged. During the drying process, the main controller 8 and the operation screen 9 adjust and display the vacuum degree, temperature and conveyor belt speed inside vacuum drying chamber 1 in real time to ensure uniform and efficient drying, solving the problems of high energy consumption and damage to leather caused by high temperature in traditional drying methods.
[0034] Reference Figure 4 The adapting component 13 includes two mounting slots 1301, which are located on the top of the left and right sides of the vacuum drying chamber 1. Two telescopic rods 1302 and two springs 1303 are fixedly connected to the top of the inner wall of each of the two mounting slots 1301. Sealing strips 1304 are fixedly connected to the bottom of each of the two adjacent telescopic rods 1302. Two connectors 1306 are fixedly connected to the front and rear sides of the vacuum drying chamber 1. A roller 1305 is rotatably connected between the two adjacent connectors 1306.
[0035] Specifically, by installing rollers 1305 at both the inlet and outlet of the conveyor belt 3, when the conveyor belt 3 carries leather into the vacuum drying chamber 1, the workload of the vacuum pump 4 increases because openings for the leather to enter and exit the vacuum drying chamber 1 are required to ensure the vacuum level inside the vacuum drying chamber 1. The rollers 1305 and the sealing strips 1304 block the inlet and outlet of the vacuum drying chamber 1, preventing air leakage. When the conveyor belt 3 carries the leather into the vacuum drying chamber 1, the rollers 1305 roll over the protruding leather and are thus lifted up. They move upward through the connectors 1306 on both sides, simultaneously moving the sealing strips 1304 upward. The height of their movement depends on the thickness of the leather, reducing the amount of air leakage. After passing the leather, the sealing strips 1304 move downward under their own weight and the elastic force of the springs 1303, thus pressing the rollers 1305 downward to reseal the inlet and outlet. This solves the problem of high energy consumption in maintaining negative pressure due to the conveyor opening during leather conveying.
[0036] Reference Figure 1 The bottom of the observation window 7 extends through and to the top of the inner wall of the vacuum drying chamber 1. The observation window 7 is used to monitor the drying process.
[0037] Specifically, the operator can directly observe the drying status of the leather in the vacuum drying chamber 1 through the observation window 7, and combine the vacuum level, temperature and conveyor belt speed displayed on the main controller 8 and the operation screen 9 to more accurately determine whether these parameters need to be adjusted.
[0038] Reference Figure 1 The top corner of the inner wall of the vacuum drying chamber 1 is arc-shaped, and water vapor inside the vacuum drying chamber 1 condenses in the groove 10 at the top of the vacuum drying chamber 1.
[0039] Specifically, the top corner of the inner wall of the vacuum drying chamber 1 is arc-shaped and has a groove 10, which guides the condensate to flow in a set direction.
[0040] Reference Figure 1 The groove 10 extends to the four corners of the inner wall of the vacuum drying chamber 1. The groove 10 and the drain pipe 11 are tightly fitted together, and the drain pipe 11 and the filter screen 12 are tightly fitted together.
[0041] Specifically, by connecting the groove 10 to the drain pipe 11, the condensate is guided by the groove 10 and finally flows into the drain pipe 11, where it is filtered by the filter screen 12 to prevent blockage inside the drain pipe 11.
[0042] Reference Figure 1 The bottom of the drain pipe 11 extends through and to the outer surface of the vacuum drying chamber 1. The drain pipe 11 is used to drain moisture from the leather.
[0043] Specifically, after receiving condensate, the drain pipe 11 extends to the outside of the vacuum drying chamber 1, and the condensate is discharged or collected through an external component connected to the outside of the vacuum drying chamber 1.
[0044] Reference Figure 4 The roller 1305 can move up and down in the connector 1306, and the sealing strip 1304 is slidably connected to the mounting groove 1301.
[0045] Specifically, the roller 1305 can not only roll between the two connecting parts 1306, but also move up and down. When passing through the leather, it can be pushed up and down. The sealing strip 1304 is also driven to move up and down, and the sealing strip 1304 seals the mounting groove 1301 while it is moving.
[0046] Reference Figure 4 The roller 1305 is tightly fitted to the conveyor belt 3, and the roller 1305 is tightly fitted to the sealing strip 1304;
[0047] Specifically, when the conveyor belt 3 is conveying, the roller 1305 is always in close contact with the conveyor belt 3 under its own weight and the action of the sealing strip 1304, and can quickly fall down after being lifted to maintain the sealing state.
[0048] Working principle: During the leather drying process, wet leather enters the vacuum drying chamber 1 via conveyor belt 3. Vacuum pump 4 is connected to vacuum drying chamber 1 through a pipe. After starting, it continuously extracts air from the drying chamber, gradually reducing the air pressure and creating a negative pressure vacuum environment. During the conveying of wet leather, heaters 6 on both sides of conveyor belt 3 are activated to provide uniform heat and continuously bake the leather. Because the boiling point of water is significantly reduced in a vacuum environment, the moisture in the leather can evaporate quickly at a relatively low temperature, thereby accelerating the drying speed and avoiding damage to the leather quality caused by high temperature. The moisture in the leather evaporates at low temperature, and the evaporated water vapor rises to the top of vacuum drying chamber 1, forming condensate in groove 10. The condensate is collected by drain pipe 11 and discharged. During the drying process, the main controller 8 and the operation screen 9 adjust and display the vacuum degree, temperature and conveyor belt speed inside vacuum drying chamber 1 in real time to ensure uniform and efficient drying.
[0049] When the conveyor belt 3 carries the leather into the vacuum drying chamber 1, the roller 1305 remains in close contact with the conveyor belt 3 under its own weight and the action of the sealing strip 1304, thus preventing air leakage. As the conveyor belt 3 carries the leather into the vacuum drying chamber 1, the roller 1305 rolls over the raised leather and is thus lifted up. It moves upward through the connectors 1306 on both sides, simultaneously driving the sealing strip 1304 upward. The height of their movement depends on the thickness of the leather, reducing the amount of air leakage. After passing the leather, the sealing strip 1304 moves downward under its own weight and the elastic force of the spring 1303, thus pressing the roller 1305 downward to reseal the inlet and outlet.
[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A leather vacuum dryer, comprising a vacuum drying chamber (1), characterized in that: A base (2) is fixedly connected between the front and rear sides of the inner wall of the vacuum drying chamber (1). A conveyor belt (3) is fixedly connected to the bottom of the inner wall of the base (2). A heater (6) is fixedly connected to both the front and rear sides of the inner wall of the vacuum drying chamber (1). A vacuum pump (4) is fixedly connected to the top of the inner wall of the vacuum drying chamber (1). A suction pipe (5) is fixedly connected to the bottom of the vacuum pump (4). An observation window (7) is fixedly connected to the top of the vacuum drying chamber (1). Multiple grooves (10) are provided on the top of the inner wall of the vacuum drying chamber (1). Drain pipes (11) are fixedly connected to the four corners of the inner wall of the vacuum drying chamber (1). A filter screen (12) is provided on the top of each of the four drain pipes (11). An operation screen (9) is fixedly connected to the front of the vacuum drying chamber (1). A main controller (8) is fixedly connected to the rear of the operation screen (9). An adaptation component (13) is provided on the inner wall of the vacuum drying chamber (1).
2. The leather vacuum dryer according to claim 1, characterized in that: The adaptation component (13) includes two mounting slots (1301), which are located on the top of the left and right sides of the vacuum drying chamber (1). Two telescopic rods (1302) and two springs (1303) are fixedly connected to the top of the inner wall of each of the two mounting slots (1301). A sealing strip (1304) is fixedly connected to the bottom of each of the two adjacent telescopic rods (1302). Two connectors (1306) are fixedly connected to the front and rear sides of the vacuum drying chamber (1). A roller (1305) is rotatably connected between the two adjacent connectors (1306).
3. The leather vacuum dryer according to claim 1, characterized in that: The bottom of the observation window (7) extends through and to the top of the inner wall of the vacuum drying chamber (1), and the observation window (7) is used to monitor the drying process.
4. A leather vacuum dryer according to claim 1, characterized in that: The top corner of the inner wall of the vacuum drying chamber (1) is arc-shaped, and water vapor inside the vacuum drying chamber (1) condenses in the groove (10) at the top of the vacuum drying chamber (1).
5. A leather vacuum dryer according to claim 1, characterized in that: The groove (10) extends to the four corners of the inner wall of the vacuum drying chamber (1). The groove (10) is tightly fitted with the drain pipe (11), and the drain pipe (11) is tightly fitted with the filter screen (12).
6. A leather vacuum dryer according to claim 1, characterized in that: The drain pipe (11) extends through the bottom to the outer surface of the vacuum drying chamber (1) and is used to drain moisture from the leather.
7. A leather vacuum dryer according to claim 2, characterized in that: The roller (1305) can move up and down in the connector (1306), and the sealing strip (1304) is slidably connected to the mounting groove (1301).
8. A leather vacuum dryer according to claim 2, characterized in that: The roller (1305) is in close contact with the conveyor belt (3), and the roller (1305) is in close contact with the sealing strip (1304).