Scoop vacuum drying machine

Abstract

The invention discloses a shovel ladle vacuum drying machine, and belongs to the technical field of industrial drying equipment. The shovel ladle vacuum drying machine comprises a vacuum shell and a rotary drying assembly arranged in the vacuum shell, the rotary drying assembly comprises a rotating shaft, the rotating shaft is rotationally connected into the vacuum shell, at least one end of the rotating shaft penetrates through the shell to be connected with a transmission mechanism, and the rotating shaft is fixedly sleeved with a ladle cavity structure; the ladle cavity structure comprises a plurality of arc-shaped cavity structures distributed in the circumferential direction of the rotating shaft in an array mode, each arc-shaped cavity structure is of a double-layer structure, and the inner spaces of the double-layer structures of the arc-shaped cavity structures communicate with one another, so that heating medium channels communicating with one another are formed in the arc-shaped cavity structures. The shoveling ladles are arranged at the ends, away from the rotating shaft, of the arc-shaped cavity structures in a one-to-one correspondence mode, continuous overturning, rising and sliding of materials are achieved through the rotating shoveling ladles, it is guaranteed that the materials make full contact with the heating surface along with rotation of the shoveling ladles and continuous change of the positions of the materials, and the drying effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial drying equipment, in particular to a scoop vacuum dryer. Background Art

[0002] Vacuum dryer is a low-temperature device that heats materials in a vacuum. Vacuum dryer is used for dehydration and drying of high value-added and heat-sensitive agricultural and sideline products, health products, food, medicinal materials, fruits and vegetables, chemical raw materials, etc. At present, as a large agricultural country, my country's agricultural grain products are gradually increasing, and the drying and storage of crops is particularly important. Generally, the simplest way to dry grain in rural areas is to dehydrate and dry it by drying it in the sun. This drying method is slow and labor-intensive, so it is necessary to use a dryer to dry the grain.

[0003] Traditional vacuum drying equipment includes a vacuum shell, a heating pipe is passed into the vacuum shell to provide heat for the vacuum shell, and a stirring device is set in the vacuum shell to stir the material in the vacuum shell to dry the material. However, due to the uneven distribution of the material in the drying chamber, the heating is uneven, which affects the drying efficiency. In addition, the material is easy to accumulate inside the equipment, further reducing the drying effect. The existing technology urgently needs a device that can effectively flip and disperse the material under vacuum and normal pressure conditions and heat it evenly, so as to improve the drying efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems in the prior art and provide a scoop vacuum dryer so that the material can be evenly heated in the vacuum shell to improve the drying efficiency.

[0005] The present invention provides a scoop vacuum dryer, comprising a vacuum shell and a rotary drying component arranged in the vacuum shell, the rotary drying component comprising a rotating shaft, the rotating shaft being horizontally arranged in the vacuum shell, the rotating shaft being rotatably connected in the vacuum shell, and at least one end passes through the vacuum shell and is connected to a transmission mechanism, the transmission mechanism is used to drive the rotating shaft to rotate, a scoop cavity structure is fixedly sleeved on the rotating shaft, the scoop cavity structure comprises a plurality of arc cavity structures arranged in an array along the circumference of the rotating shaft, each of the arc cavity structures is a double-layer structure, and the internal spaces of the double-layer structures of each arc cavity structure are connected to form a heat medium channel, and heat medium flows through the heat medium channel.

[0006] Preferably, the edge of the arc-shaped shovel is 1 mm to 15 mm away from the inner shell, and the arc angle ranges from 15 to 60°.

[0007] Preferably, a guide plate is fixedly provided on the outer side of the scoop cavity structure.

[0008] Preferably, the guide plate is arranged in an arc shape.

[0009] Preferably, the connection between the rotating shaft and the vacuum housing is sealed by a sealing device.

[0010] Preferably, both sides of the vacuum housing connected to the rotating shaft are fixedly connected with a bearing plate, the bearing plate is fixedly connected with a bearing, and the rotating shaft is rotatably nested in the bearing.

[0011] Preferably, the spin drying assembly and the inner side of the vacuum housing can be provided with a non-stick material, polished or surface-coated.

[0012] Preferably, a feed port is provided at the top of the vacuum shell, a discharge port is provided at the bottom of the vacuum shell, and the axes of the feed port and the discharge port coincide with each other, and an exhaust port is provided at the top of the vacuum shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: in the shovel-scoop vacuum dryer of the present invention, the material is evenly distributed in the scoop cavity structure, and the connecting shaft is driven to rotate by the transmission mechanism during drying, and the connecting shaft drives the evenly distributed scoop cavity structure to rotate. Under the shoveling of the set arc-shaped shovel, the material is continuously turned over, raised and slid, effectively preventing accumulation, and the scoop cavity structure is set to be double-layered and a heat medium channel is set in the double-layer scoop cavity structure to pass heat medium. On the one hand, heating is provided by a heating device set on the vacuum shell to generate heat for the vacuum shell, and on the other hand, heat is generated in the scoop cavity structure through the heat medium, thereby improving the drying rate in the dual heating mode, and when the arc-shaped shovel shovels the material, the position of the material changes continuously to make the material heated evenly, which not only avoids local overheating, but also allows the material to fully contact with the heating surface, thereby ensuring that the material is evenly and quickly dried in a vacuum environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the rotary drying component of the present invention.

[0016] Figure 3 It is a left-side structural schematic diagram of the present invention.

[0017] Figure 4 It is a right view structural schematic diagram of the present invention.

[0018] Explanation of the reference numerals: 1. Vacuum shell; 2. Rotary drying assembly; 21. Rotating shaft; 22. Ladle cavity structure; 23. Arc shovel; 3. Guide plate; 4. Mechanical seal; 5. Feed inlet; 6. Discharge outlet; 7. Exhaust outlet; 8. Load-bearing plate; 9. Bearing; 11. Heat medium; 12. Heat medium inlet; 13. Heat medium outlet; 14. Transmission mechanism. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1 to Figure 4 In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present invention belongs.

[0020] The words "first", "second" and similar words used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. "Inside", "outside", "upper", "lower", "far", "near", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in the present invention are not drawn strictly according to the actual scale. The specific size and quantity of each structure can be determined according to actual needs. The drawings described in the present invention are only schematic diagrams of the structure.

[0021] The scoop vacuum dryer provided by the present invention is as follows: Figure 1 to Figure 4 As shown, it includes a vacuum shell 1 and a rotary drying component 2 arranged in the vacuum shell 1, the rotary drying component 2 includes a rotating shaft 21, the rotating shaft 21 is horizontally arranged in the vacuum shell 1, the rotating shaft 21 is rotatably connected to the vacuum shell 1, and at least one end passes through the vacuum shell 1 and is connected to the transmission mechanism, the transmission mechanism is used to drive the rotating shaft 21 to rotate, a scoop cavity structure 22 is fixedly sleeved on the rotating shaft 21, the scoop cavity structure 22 includes a plurality of arc-shaped cavity structures arranged in an array along the circumference of the rotating shaft 21, each arc-shaped cavity structure is a double-layer structure, and the internal space of the double-layer structure of each arc-shaped cavity structure is connected, so that the interior of each arc-shaped cavity structure forms a heat medium 11 channel that is interconnected, and a plurality of arc-shaped shovels 23 are respectively and one-to-one arranged at one end of each arc-shaped cavity structure away from the rotating shaft 21.

[0022] In the scoop vacuum dryer of the present invention, the material is continuously turned over, raised and slid by the rotating arc shovel 23. With the rotation of the arc shovel 23, the position of the material is constantly changed to ensure that the material is in full contact with the surface of the scoop cavity structure 22. The material is directly heated by the inner surface of the scoop cavity structure 22 and the guide plate 3. At the same time, the material is also heated by the heat radiation of the dryer vacuum shell 1 and the scoop cavity structure 22, so that the liquid in the material is gradually evaporated, thereby improving the drying rate.

[0023] As the arc shovel 23 rotates further, the material slides from the scoop cavity structure 22 back to the bottom of the vacuum shell 1, and continues to receive heat from the vacuum shell 1 during this process, completing a complete drying cycle. Each time the material rotates, it repeats this process until the drying is completed. As the arc shovel 23 continues to rotate, the potential energy of the material in the shovel gradually increases, and then it slides and flips into the scoop cavity structure 23, ensuring that the material is fully stirred, and can handle granular and powdery materials, avoid accumulation and agglomeration, and improve drying efficiency.

[0024] In the present invention, the heat medium 11 introduced into the heat medium channel can be selected from steam, hot water, heat transfer oil, etc., and introduced into the scoop cavity structure 22 to provide heat. An electric heating tube can also be built in to heat the heat transfer oil, water and other media for heat transfer. For example, a rotary joint can be used to enter and export the scoop cavity structure 22 from the other side of the transmission shaft. The hot heat medium 11 is in the upper part of the double-layer scoop cavity structure 22 due to its light specific gravity, and the low-temperature heat medium 11 is exported from the lower part of the double-layer scoop cavity structure 22 through the rotary joint discharge pipe, forming a thermal cycle heating.

[0025] Preferably, Figure 2 to Figure 4 As shown, the edge of the arc-shaped shovel 23 is 1 mm to 15 mm away from the inner shell, and the angle range of the arc is 15 to 60 degrees.

[0026] The radius of the arc shovel 23 is preferably consistent with the radius of the vacuum shell 1, and it is offset from the center of the vacuum shell 1 so that the edge of the arc shovel 23 is close to the intersection of the vacuum shell 1. The edge of the arc shovel 23 is 1mm to 15mm away from the inner shell, and the angle range of the arc is 15 to 60°, which is determined by the outer edge width of the arc shovel 23. The closer to the vacuum shell 1, the better the drying effect, but it should not scratch the vacuum shell 1. The material has different viscosity and fluidity. The best angle of the arc needs to be adjusted according to the material. The general angle range is 5 to 60°, and the range can also be wider to achieve the best drying efficiency.

[0027] Preferably, Figure 2-Figure 3 As shown, a guide plate 3 is fixedly arranged on the outside of the scoop cavity structure 22, and the guide plate 3 is arranged in an arc shape. The connection between the rotating shaft 21 and the vacuum shell 1 adopts a mechanical seal.

[0028] Several groups of guide plates 3 are arranged on the back of the scoop cavity structure 22. When the material slides down, the several groups of guide plates 3 have a certain angle toward the discharge port 6 so that the material converges to the discharge port 6 when it slides down. During normal operation, there is more material, and the height of the material exceeds the height of the guide plate 3 and returns to the original position, increasing the contact surface and fluidity. When discharging the material, there is less material at the discharge port 6 and the material will converge to the discharge port 6. The guide plate 3 is designed to be an arc plate, which can better connect with the scoop cavity structure 22. On the one hand, when the material slides down during the rotation process, the flow direction of the material can be adjusted throughout the process so that the material slides to the center of the scoop cavity structure 22. On the other hand, the guide plate 3 fits tightly with the scoop cavity structure 22, so that the heat of the double-layer heat medium 11 in the scoop cavity structure 22 is transferred to the guide plate 3, ensuring uniform heating of the material. The guide plate 23 is welded to the scoop cavity structure 22, and the heat of the scoop cavity structure 22 is easily transferred to the guide plate 23. The guide plate 23 is in contact with the material on both sides to increase the heat exchange area. For products requiring high anti-pollution, a mechanical seal 4 is preferred.

[0029] Preferably, Figure 1 to Figure 4 As shown, a feed port 5 is provided in the middle of the top of the vacuum shell 1 , a discharge port 6 is provided in the middle of the bottom of the vacuum shell 1 , and the axes of the feed port 5 and the discharge port 6 coincide with each other. An exhaust port 7 is provided at the top of the vacuum shell 1 .

[0030] The inlet and outlet 6 is in the middle of the dryer, and the material can be evenly discharged in the shortest time. A valve is installed at the exhaust port 7. The valve is opened to connect the vacuum system, and the steam in the dryer is discharged along the vacuum pipeline. The vacuum or normal pressure state in the vacuum shell 1 is maintained by a vacuum pump or an exhaust system, and the moisture or solvent in the material is evaporated and discharged through the exhaust port 7. The vacuum system effectively reduces the boiling point of the material, accelerates the evaporation of moisture or solvent, shortens the drying time, maintains a vacuum or normal pressure environment, thereby reducing the drying temperature of the material and avoiding high temperature from damaging the material properties.

[0031] Preferably, Figure 1 to Figure 3 As shown, the dryer body also includes a pair of supporting plates 8, which are fixedly connected to both sides of the vacuum shell 1. Bearings 9 are fixedly connected to the supporting plates 8. The rotating shaft 21 is rotatably nested in the bearings 9. The stirring component and the internal vacuum shell 1 can be set with non-stick materials, polished or surface coated.

[0032] The transmission mechanism 14 is connected to the arc shovel 23 to ensure that the equipment operates stably under vacuum conditions. The two ends of the rotating shaft 21 are supported by bearings 9 and are provided with a shaft sealing structure to ensure that the vacuum environment is not destroyed during the drying process. In order to prevent the material from adhering to the arc shovel 23 or the inner surface of the vacuum shell, the interior of the vacuum shell 1, the rotating shaft 21, the scoop cavity structure 22 and the arc shovel 23 are all made of non-stick materials, polished or surface coated. Teflon, glass lining, enamel and other materials can be used.

[0033] The method of using the scoop vacuum dryer of the present invention is as follows:

[0034] The material enters the vacuum shell 1 of the dryer through the feed port 5, and the arc-shaped shovel 23 is driven to rotate by the transmission mechanism 14 to scoop up the material, and the material gradually slides into the scoop cavity structure 22 as it rotates. In the scoop cavity structure 22, on the one hand, the heating device provided on the vacuum shell 1 provides heating to generate heat for the vacuum shell, and on the other hand, the heat medium 11 is used to generate heat for the scoop cavity structure 22, and the drying rate is increased in the dual heating mode. At the same time, the material is evenly distributed and turned over by the guide plate 3 to ensure uniform heating. As the rotation continues, the material is lifted, turned over and heated for many times, and the moisture or solvent is quickly evaporated in the vacuum environment. The water vapor is discharged through the exhaust port 7, and the dried material is discharged from the equipment through the discharge port 6, completing the entire drying process.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scoop vacuum dryer, comprising an externally heated vacuum housing (1) and a rotary drying assembly (2) disposed in the vacuum housing (1), characterized in that: The rotary drying component (2) comprises: A rotating shaft (21) is horizontally arranged in the vacuum housing (1), the rotating shaft (21) is rotatably connected in the vacuum housing (1), and at least one end thereof passes through the vacuum housing (1) and is connected to a transmission mechanism (14), wherein the transmission mechanism (14) is used to drive the rotating shaft (21) to rotate; The gourd cavity structure (22) is sleeved on the rotating shaft (21), and the gourd cavity structure (22) includes a plurality of arc-shaped cavity structures arranged in an array along the circumference of the rotating shaft (21), each of the arc-shaped cavity structures is a double-layer structure, and the internal spaces of the double-layer structures of each arc-shaped cavity structure are connected, so that the interiors of each arc-shaped cavity structure form interconnected heat medium channels, and the heat medium (11) flows in the heat medium channels; A plurality of arc-shaped shovels (23) are respectively arranged one by one at an end of each arc-shaped cavity structure away from the rotating shaft (21).

2. The scoop vacuum dryer according to claim 1, characterized in that: The edge of the arc-shaped shovel (23) is 1 mm to 15 mm away from the inner shell, and the arc angle ranges from 15 to 60°.

3. The scoop vacuum dryer according to claim 1, characterized in that: A guide plate (3) is fixedly arranged on the outside of the scoop cavity structure (22).

4. The scoop vacuum dryer according to claim 3, characterized in that: The guide plate (3) is arranged in an arc shape.

5. The scoop vacuum dryer according to claim 1, characterized in that: The connection between the rotating shaft (21) and the vacuum housing (1) is sealed by means of a mechanical seal (4).

6. The scoop vacuum dryer according to claim 1, characterized in that: The vacuum housing (1) is connected to the rotating shaft (21) on both sides thereof and is fixedly connected to a bearing plate (8); a bearing (9) is fixedly connected to the bearing plate (8); and the rotating shaft (21) is rotatably nested in the bearing (9).

7. The scoop vacuum dryer according to claim 1, characterized in that: The interior of the vacuum housing (1), the rotating shaft (21), the scoop cavity structure (22) and the arc-shaped shovel (23) are all polished with non-stick materials or subjected to surface coating treatment.

8. The scoop vacuum dryer according to claim 1, characterized in that: The top of the vacuum shell (1) is provided with a feed port (5), one side of the feed port (5) is provided with an exhaust port (7), and the bottom of the vacuum shell (1) is provided with a discharge port (6).

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