Vacuum paddle dryer

Abstract

The utility model discloses a vacuum paddle dryer which is characterized by comprising a shell, a stirring assembly is arranged in the shell, a transmission mechanism is arranged on the stirring assembly, a plurality of hollow paddles are arranged on the outer wall of a hollow shaft in the axial direction, and a closed space is formed between the hollow paddles and the hollow shaft. A flow conveying pipe is arranged in the hollow shaft, a flow guide pipe is arranged on the flow conveying pipe in a communicating mode, the flow guide pipe extends into the hollow blades, backflow holes are formed in the hollow shaft in a penetrating mode, and the backflow holes are communicated with an inner cavity of the hollow blades and an inner cavity of the hollow shaft. A heat source flows in from the flow conveying pipe, passes through the hollow blades, then flows into the hollow shaft and is recycled, the residence time of the heat source is prolonged, the heat energy utilization rate is increased, and the working efficiency of the drying machine is improved.

Description

Technical Field

[0001] The utility model relates to the field of dryers, in particular to a vacuum blade dryer. Background Art

[0002] The paddle dryer is a continuous, high-efficiency, low-speed stirring drying equipment. It is suitable for drying powdery materials, granular materials or sticky materials such as chemicals, synthetic resins, mineral products, medicines, feeds, dyes and foods. The working principle of the paddle dryer is to indirectly heat the material through the cylinder and the hollow paddle shaft, and use the propulsion of the paddle to achieve continuous drying production.

[0003] In the prior art, when a traditional paddle dryer is working, a heat source is introduced into the dryer. When the heat source flows into the hollow paddle, the heat source stays in the dryer for a short time, and the contact drying area is not active. The material is often not completely dried before it faces the problem of discharging, resulting in low utilization of the heat energy of the heat source and increased production costs. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a vacuum blade dryer.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A vacuum paddle dryer comprises a shell, a stirring assembly is arranged in the shell, the stirring assembly comprises a hollow shaft with two ends extending out of the shell, a transmission mechanism is arranged on the hollow shaft, the transmission mechanism comprises a motor, a reducer is connected to the output shaft of the motor through a transmission belt, a coupling is arranged on the output shaft of the reducer, the coupling is connected to the hollow shaft, a plurality of hollow blades are axially arranged on the outer wall of the hollow shaft, a closed space is formed between the hollow blades and the hollow shaft, a flow pipe is arranged in the hollow shaft, a flow guide pipe is connected to the flow pipe, the flow guide pipe extends into the hollow blade, a reflux hole is penetrated on the hollow shaft, the reflux hole is connected to the inner cavity of the hollow blade and the inner cavity of the hollow shaft, an inlet pipe is arranged on the flow pipe, and an outlet pipe is arranged on the hollow shaft.

[0007] Furthermore, a vertical plate is provided in the shell, and the vertical plate divides the shell into a mixing bin and a discharging bin. A plurality of hollow blades are provided in the mixing bin, and a discharging port is provided at the bottom of the discharging bin.

[0008] Furthermore, a through slot is arranged on the vertical plate, and a first baffle plate covers the through slot. A transmission rod is rotatably arranged on the discharge bin, and the transmission rod is connected to the first baffle plate.

[0009] Furthermore, a plurality of second baffles are arranged in the closed space formed between the hollow blade and the hollow shaft, and the second baffles are arranged between the flow guide pipe and the return hole.

[0010] Furthermore, a plurality of the second baffles are staggeredly distributed on the outer wall of the fluid delivery pipe and the inner wall of the hollow blade opposite to the outer wall of the hollow shaft.

[0011] Furthermore, a scraper is provided on the outer wall of the hollow blade, and the two adjacent hollow blades are staggered and distributed on the outer wall of the hollow shaft.

[0012] Furthermore, a rotating joint is provided at one end of the hollow shaft away from the motor, a mounting cavity is constructed in the rotating joint, the mounting cavity is communicated with the inner cavity of the hollow shaft, the inflow pipe is arranged in the mounting cavity, and the outflow pipe is communicated with the mounting cavity.

[0013] Furthermore, reinforcing plates are provided on both sides of the shell, and the reinforcing plates are connected to the hollow shaft through bearings. A protective shell is sleeved on the side wall of the bearing, and a cooling cavity is formed between the protective shell and the bearing. A water inlet pipe and a water outlet pipe are connected to the protective shell.

[0014] Furthermore, a heating layer is provided on the outer wall of the shell.

[0015] Furthermore, an observation window is provided on the shell.

[0016] The beneficial effect achieved by the utility model is as follows: by introducing a heat source into the flow pipe, when the hollow shaft rotates, the heat source will flow into the hollow blade through the guide pipe, and due to the centrifugal force in the hollow blade, the heat source will pass through a plurality of second baffles and then flow into the inner cavity of the hollow shaft from the reflux hole. The second baffles are arranged to increase the residence time of the heat source in the blade, so that the drying effect of the material to be dried in the dryer is better, and the heat source can pass through the inner cavity of the hollow shaft during the recovery process, which further increases the drying effect, improves the utilization rate of thermal energy, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment;

[0018] Figure 2 It is a schematic diagram of the structure inside the embodiment;

[0019] Figure 3 is a cross-sectional view of a stirring assembly;

[0020] Figure 4 This is a schematic diagram of the structure inside the discharge bin.

[0021] Figure 5 A cross-sectional view of an embodiment

[0022] Figure numerals: 1. Shell; 2. Stirring assembly; 3. Hollow shaft; 4. Transmission mechanism; 5. Motor; 6. Transmission belt; 7. Reducer; 8. Hollow blade; 9. Flow pipe; 10. Guide pipe; 11. Reflux hole; 12. Inflow pipe; 13. Outflow pipe; 14. Vertical plate; 15. Discharge port; 16. First baffle; 17. Transmission rod; 18. Second baffle; 19. Scraper; 20. Rotary joint; 21. Reinforcement plate; 22. Protective shell; 23. Water inlet pipe; 24. Water outlet pipe; 25. Heating layer; 26. Observation window. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 4 As shown, a vacuum paddle dryer includes a housing 1, a stirring assembly 2 is arranged in the housing 1, and the stirring assembly 2 includes a hollow shaft 3 extending out of the housing 1 at both ends. The hollow shaft 3 can be two groups, and a transmission mechanism 4 is arranged on one of the hollow shafts 3, and the transmission mechanism 4 provides power output for the hollow shaft 3. The transmission mechanism 4 includes a motor 5, and a reducer 7 is connected to the output end of the motor 5 through a conveyor belt. A coupling is arranged on the output shaft of the reducer 7, and the coupling connects the reducer 7 with one of the hollow shafts 3. A driving gear is arranged at one end of the hollow shaft 3 connected to the coupling, and a driven gear is arranged at one end of the other hollow shaft 3 close to the driving gear. The reducer 7 is driven to work by outputting power from the motor 5, and a suitable speed is provided for the hollow shaft 3 through the reducer 7 to achieve stirring of the dried material. In addition, a plurality of hollow blades 8 are arranged circumferentially on the outer wall of the hollow shaft 3, and the hollow blades 8 on the two groups of hollow shafts 3 are staggered to make the stirring more comprehensive and increase the drying effect.

[0025] In detail, a closed space is formed between the hollow blade 8 and the hollow shaft 3, a flow pipe 9 is provided in the hollow shaft 3, a flow guide pipe 10 is provided on the flow pipe 9, and the flow guide pipe 10 extends into the hollow blade 8, a reflux hole 11 is provided through the hollow shaft 3, and the reflux hole 11 connects the inner cavity of the hollow blade 8 with the inner cavity of the hollow shaft 3, an inflow pipe 12 is provided on the flow pipe 9, and an outflow pipe 13 is provided on the hollow shaft 3. In addition, a rotary joint 20 is provided at one end of the hollow shaft 3 away from the motor 5, and an installation cavity is constructed in the rotary joint 20, and the installation cavity is connected to the inner cavity of the hollow shaft 3, the inflow pipe 12 is provided in the installation cavity, and the outflow pipe 13 is connected to the installation cavity. The heat source is introduced from the inlet pipe 12 and passes through the flow pipe 9. At this time, the hollow shaft 3 rotates under the drive of the motor 5, driving the flow pipe 9 to rotate, so that the heat source in the flow pipe 9 enters the inner cavity of the hollow blade 8 through the guide pipe 10, heats the hollow blade 8, and transfers the heat to the material to be dried through the hollow blade 8. After continuing to rotate, the heat source will flow into the inner cavity of the hollow shaft 3 from the reflux hole 11 to provide heat energy for the hollow shaft 3. The heat source finally flows into the installation cavity of the rotary joint 20 and flows out from the outflow pipe 13, and the heat source is recycled. In more detail, a plurality of second baffles 18 are also provided in the hollow blade 8. The plurality of second baffles 18 are staggeredly distributed on the outer wall of the hollow shaft 3 and the inner wall of the hollow blade 8 opposite to the outer wall of the hollow shaft 3. The heat source will cling to the inner wall of the hollow blade 8 under the action of centrifugal force. The heat source is guided to flow in the hollow blade 8 by the second baffles 18, so that the heat source is distributed more quickly and evenly in the hollow blade 8, thereby increasing the drying effect.

[0026] Among them, a vertical plate 14 is also provided in the shell 1, and the vertical plate 14 divides the shell 1 into a mixing bin and a discharging bin. A plurality of hollow blades 8 are provided in the mixing bin, and a discharging port 15 is provided at the bottom of the discharging bin. In addition, a through groove is provided on the vertical plate 14, and a first baffle 16 is covered on the through groove. A transmission rod 17 is rotatably provided on the discharging bin, and the first baffle 16 is connected to the transmission rod 17 through a connecting plate. Preferably, the first baffle 16 can also be driven by providing an electric push rod on the discharging bin. The material to be dried is stirred in the mixing bin, and the rotation of the hollow blades 8 pushes the material to be dried toward the discharging bin. When the material to be dried is stirred and approaches the vertical plate 14, the rotating transmission rod 17 drives the connecting plate to move and drives the first baffle 16 to move away from the vertical plate 14, so that the dried material enters the discharging bin and falls into the discharging port 15. The valve on the discharging port 15 is opened to collect the dried material.

[0027] In some embodiments, a scraper 19 is disposed on the outer wall of the hollow blade 8. The scraper 19 can fill the gap between two adjacent hollow blades 8, so that the stirring is more sufficient.

[0028] In some embodiments, reinforcing plates 21 are further provided on both sides of the shell 1. The reinforcing plates 21 are connected to the two ends of the hollow shaft 3 extending out of the shell 1 through bearings to provide stable support for the hollow shaft 3 during rotation. A protective shell 22 is sleeved on the side wall of the bearing. A cooling cavity is formed between the protective shell 22 and the bearing. A water inlet pipe 23 and a water outlet pipe 24 are connected to the protective shell 22. When the bearing temperature is too high, water is introduced into the water inlet pipe 23, and the water flows into the cooling cavity and contacts the bearing to cool the bearing.

[0029] In addition, a heating layer 25 is provided on the outer wall of the shell 1, and pipes are connected to the upper and lower ends of the heating layer 25. The pipe at the upper end can provide a heat source for the heating layer 25, and the pipe at the lower end can allow the heat source to flow out. The shell 1 can be heated and insulated by the set heating layer 25, thereby increasing the drying effect, improving the drying efficiency, and preventing heat loss.

[0030] For example, the housing 1 is provided with a plurality of observation windows 26, through which the working state inside the dryer can be observed. In addition, the inside of the dryer is vacuumized by a vacuum pump, and packing is installed at the inner and outer interfaces of the hollow shaft 3 and the housing 1 for sealing, so as to maintain a vacuum environment inside the dryer.

[0031] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A vacuum paddle dryer, characterized in that: The invention comprises a shell (1), wherein a stirring assembly (2) is arranged in the shell (1), wherein the stirring assembly (2) comprises a hollow shaft (3) with two ends extending out of the shell (1), wherein a transmission mechanism (4) is arranged on the hollow shaft (3), wherein the transmission mechanism (4) comprises a motor (5), wherein an output shaft of the motor (5) is connected to a reducer (7) via a transmission belt (6), wherein a coupling is arranged on the output shaft of the reducer (7), wherein the coupling is connected to the hollow shaft (3), wherein a plurality of hollow blades (8) are arranged on the outer wall of the hollow shaft (3) along the axial direction, wherein the outer wall of the hollow shaft (3) is provided with a plurality of hollow blades (8), ... A closed space is formed between the hollow blade (8) and the hollow shaft (3); a fluid delivery pipe (9) is arranged inside the hollow shaft (3); a flow guide pipe (10) is arranged on the fluid delivery pipe (9) in communication; the flow guide pipe (10) extends into the hollow blade (8); a return hole (11) is arranged through the hollow shaft (3); the return hole (11) is connected to the inner cavity of the hollow blade (8) and the inner cavity of the hollow shaft (3); an inflow pipe (12) is arranged on the fluid delivery pipe (9); and an outflow pipe (13) is arranged on the hollow shaft (3).

2. The vacuum paddle dryer according to claim 1, characterized in that: A vertical plate (14) is also provided in the shell (1), and the vertical plate (14) divides the shell (1) into a mixing bin and a discharge bin. A plurality of hollow blades (8) are provided in the mixing bin, and a discharge port (15) is provided at the bottom of the discharge bin.

3. The vacuum paddle dryer according to claim 2, characterized in that: The vertical plate (14) is provided with a through slot, the through slot is covered with a first baffle (16), a transmission rod (17) is rotatably provided on the discharge bin, and the transmission rod (17) is connected to the first baffle (16).

4. The vacuum paddle dryer according to claim 1, characterized in that: A plurality of second baffles (18) are also arranged in the closed space formed between the hollow blade (8) and the hollow shaft (3), and the second baffles (18) are arranged between the flow guide tube (10) and the return hole (11).

5. The vacuum paddle dryer according to claim 4, characterized in that: A plurality of the second baffles (18) are staggeredly distributed on the outer wall of the fluid delivery pipe (9) and the inner wall of the hollow blade (8) opposite to the outer wall of the hollow shaft (3).

6. The vacuum paddle dryer according to claim 1, characterized in that: A scraper (19) is provided on the outer wall of the hollow blade (8), and two adjacent hollow blades (8) are staggeredly distributed on the outer wall of the hollow shaft (3).

7. The vacuum paddle dryer according to claim 1, characterized in that: A rotary joint (20) is provided at one end of the hollow shaft (3) away from the motor (5), a mounting cavity is configured inside the rotary joint (20), the mounting cavity is communicated with the inner cavity of the hollow shaft (3), the inflow pipe (12) is arranged in the mounting cavity, and the outflow pipe (13) is communicated with the mounting cavity.

8. The vacuum paddle dryer according to claim 1, characterized in that: Reinforcement plates (21) are also provided on both sides of the housing (1); the reinforcement plates (21) are connected to the hollow shaft (3) via bearings; a protective shell (22) is sleeved on the side wall of the bearing; a cooling cavity is formed between the protective shell (22) and the bearing; and a water inlet pipe (23) and a water outlet pipe (24) are connected to the protective shell (22).

9. The vacuum paddle dryer according to claim 1, characterized in that: A heating layer (25) is provided on the outer wall of the shell (1).

10. The vacuum paddle dryer according to claim 1, characterized in that: The housing (1) is provided with an observation window (26).

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