A hot air circulation drying device

Abstract

The utility model discloses a hot -blast circulation drying device, including drying cylinder, drying box, filter, the stirring motor is installed on drying cylinder, is equipped with with the air supply pipe of stirring motor output shaft connection in drying cylinder, is connected with a plurality of spout pipes on air supply pipe, the joint pipe of air supply pipe rotary connection is inserted in drying cylinder bottom, the joint pipe is connected with hot -blast machine, the honeycomb molecular sieve is rotatably installed in drying box, the partition strip of being located honeycomb molecular sieve left and right sides is equipped with in drying box inner wall, and drying box is connected between hot -blast machine and drying box with drying cylinder and hot -blast machine intercommunication, filter, the hot blast of hot -blast machine exhaust respectively flows to drying cylinder and honeycomb molecular sieve, and the raw material in drying cylinder is dried, and the wet hot air of drying cylinder exhaust passes through honeycomb molecular sieve dehumidification and reutilization, and the honeycomb molecular sieve can continuously absorb moisture and need not maintain frequently to be dried by hot air, and prolongs the replacement period of honeycomb molecular sieve.

Description

Technical Field

[0001] This utility model relates to the field of plastic drying technology, specifically a hot air circulating drying device. Background Technology

[0002] When producing plastic parts, raw materials and crushed defective products and scraps are prepared in proportion. After the crushed materials and raw materials are mixed, they need to be dried to control the moisture content below 0.02% to ensure the quality of the plastic parts.

[0003] Among related technologies, the most common method is hot air drying. Air is heated to a certain temperature and then sent to a container holding crushed materials and raw materials for further heating. The discharged hot air contains a small amount of moisture, which is dried by a molecular sieve or other moisture-absorbing material before reuse, achieving hot air recycling. For example, a molecular sieve dehumidification dryer (publication number CN214914784U) incorporates a connecting part. Utilizing the sliding connection between the roller groove and the roller, the connecting part and the fixed part can be easily separated. After the connecting part detaches from the fixed part, the operator can easily remove the molecular sieve by rotating the limiting ring, making disassembly convenient.

[0004] However, while the above method can dry hot and humid air, the molecular sieve needs to be replaced regularly and maintained in a timely manner. Otherwise, the air humidity will be high, reducing the drying effect on crushed materials and raw materials. Each maintenance will require a shutdown, making it inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to provide a hot air circulating drying device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hot air circulating drying device, including a drying cylinder, an agitator motor installed on the drying cylinder, an air supply pipe connected to the output shaft of the agitator motor inside the drying cylinder, a plurality of nozzle pipes connected to the air supply pipe, a connector pipe rotatably connected to the air supply pipe inserted at the bottom of the drying cylinder, the connector pipe being connected to a hot air blower, and the nozzle pipes being rotated by the agitator motor to agitate the raw material and diffuse hot air into the raw material, thereby accelerating the drying of the raw material;

[0007] A drying chamber is provided, in which a honeycomb molecular sieve is rotatably installed. A servo motor is installed on the surface of the drying chamber to control the rotation of the honeycomb molecular sieve. The inner wall of the drying chamber is provided with partition strips on the left and right sides of the honeycomb molecular sieve. The drying chamber is connected to a drying cylinder and a hot air blower. The honeycomb molecular sieve dries the humid and hot air and then reuses it, reducing heat energy waste. A portion of the hot air discharged by the hot air blower dries the honeycomb molecular sieve, extending its service life.

[0008] The filter, connected between the hot air blower and the drying chamber, can prevent impurities from mixing into the raw materials and also prevent excessive impurities from adhering to the honeycomb molecular sieve.

[0009] Furthermore, the upper surface of the drying cylinder is provided with a feeding port and an air outlet, and the drying box is provided with four interfaces. The air outlet is connected to the corresponding interface, and the air used for drying the honeycomb molecular sieve is discharged from the interface. Multiple interfaces facilitate the connection of the drying box with the drying cylinder, outer box, and hot air blower.

[0010] Furthermore, the outlet of the hot air blower is connected to a three-way pipe, which is connected to the interface and connector pipe of the drying box. The hot air blower can dry raw materials and honeycomb molecular sieves, thus realizing the dual function of the hot air blower.

[0011] Furthermore, an air jet is connected to the lower surface of the connector tube, which can dry the raw materials at the bottom of the drying cylinder, achieving comprehensive dehumidification of the raw materials.

[0012] Furthermore, the filter includes an outer casing and filter elements. Two filter elements are provided and inserted parallel to each other into the outer casing. A sealing frame is provided on the side of each filter element, and a handle is connected to the sealing frame. When replacing the filter element, it can be pulled out directly, making the operation simple.

[0013] Furthermore, the servo motor is connected to a mounting frame, and the honeycomb molecular sieve is placed inside the mounting frame, allowing the honeycomb molecules to be removed from the mounting frame for replacement.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) The hot air discharged from the hot air blower flows to the drying cylinder and the honeycomb molecular sieve respectively. The raw materials in the drying cylinder are dried. The hot and humid air discharged from the drying cylinder is dehumidified and reused by the honeycomb molecular sieve. The honeycomb molecular sieve can continuously absorb moisture after being dried by the hot air, without the need for frequent maintenance, thus extending the replacement cycle of the honeycomb molecular sieve.

[0016] (2) The stirring motor controls the rotation of the nozzle pipe, which can diffuse hot air into the raw material for drying. The stirring of the raw material by the nozzle pipe can achieve uniform drying of the raw material and improve the drying efficiency.

[0017] (3) The air drawn by the hot air blower is filtered through two filter elements, which can reduce impurities in the raw materials. The filter elements can be pulled out and replaced by the handle. At this time, the other filter element can also filter the air. Replacing the filter element will not affect the air filtration and will not delay the drying of the raw materials. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the interior of the drying cylinder of this utility model;

[0020] Figure 3 This is a schematic diagram showing the connection between the drying oven and the partition strip of this utility model;

[0021] Figure 4 This is a schematic diagram showing the connection between the servo motor and the mounting frame of this utility model;

[0022] Figure 5 This is a schematic diagram showing the connection between the outer casing and the filter element of this utility model.

[0023] In the diagram: 1. Drying cylinder; 2. Feeding port; 3. Stirring motor; 4. Air outlet; 5. Drying chamber; 6. Interface; 7. Servo motor; 8. Hot air blower; 9. T-connector; 10. Connector pipe; 11. Outer casing; 12. Handle; 13. Air supply pipe; 14. Nozzle pipe; 15. Mechanical seal; 16. Air jet head; 17. Separator strip; 18. Honeycomb molecular sieve; 19. Sealing frame; 20. Filter element; 21. Mounting frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1-5 This utility model provides a technical solution: a hot air circulating drying device, including a drying cylinder 1, the lower part of which is conical to avoid residue problems when discharging raw materials. A stirring motor 3 is installed on the drying cylinder 1. An air supply pipe 13 connected to the output shaft of the stirring motor 3 is provided inside the drying cylinder 1. Several nozzle pipes 14 are connected to the air supply pipe 13. A connector pipe 10 rotatably connected to the air supply pipe 13 is inserted into the bottom of the drying cylinder 1. The connector pipe 10 does not affect the rotation of the air supply pipe 13. A hot air blower 8 is connected to the connector pipe 10. The air supply pipe 13 is rotated by the stirring motor 3. The air supply pipe 13 provides hot air to each nozzle pipe 14 to agitate the raw materials and make the hot air dry the raw materials evenly.

[0027] The drying chamber 5 contains a honeycomb molecular sieve 18 rotatably mounted inside. A servo motor 7 is mounted on the surface of the drying chamber 5 to control the rotation of the honeycomb molecular sieve 18. The inner wall of the drying chamber 5 is provided with partition strips 17 on the left and right sides of the honeycomb molecular sieve 18. The partition strips 17 can separate humid air from hot air. The drying chamber 5 is connected to the drying cylinder 1 and the hot air blower 8. The speed of the servo motor 7 can be controlled to adjust the speed of the honeycomb molecular sieve 18. The surface of the honeycomb molecular sieve 18 has honeycomb holes, and humid air is dehumidified when it flows through the honeycomb molecular sieve 18.

[0028] A filter is connected between the hot air blower 8 and the drying chamber 5. During hot air circulation, a small amount of impurities are collected by the filter, which can prevent impurities from mixing into the raw materials.

[0029] In this embodiment, as Figure 1 As shown, the upper surface of the drying cylinder 1 is provided with a feeding port 2 and an air outlet 4. The drying chamber 5 is provided with four interfaces 6. The air outlet 4 is connected to the corresponding interface 6. The upper left interface 6 sends hot and humid air to the drying chamber 5, the upper right interface 6 discharges dehumidified air, the lower left interface 6 sends hot air to the drying chamber 5 to dry the honeycomb molecular sieve 18, and the lower right interface 6 discharges the air used to dry the honeycomb molecular sieve 18.

[0030] In this embodiment, as Figure 1 As shown, the air outlet of the hot air blower 8 is connected to a three-way pipe 9, which is connected to the interface 6 and the connector pipe 10 of the drying box 5. An electric valve can be installed between the three-way pipe 9 and the interface 6 to adjust the air volume and to dry the honeycomb molecular sieve 18 at regular intervals.

[0031] In this embodiment, as Figure 2 As shown, the lower surface of the connector pipe 10 is connected to a jet nozzle 16, which sprays hot air in all directions to dry the raw materials at the bottom of the drying cylinder 1, thereby achieving complete drying of the raw materials.

[0032] In this embodiment, as Figure 2 As shown, a mechanical seal 15 is connected between the air supply pipe 13 and the connector pipe 10. The mechanical seal 15 can improve the sealing performance of the connection between the connector pipe 10 and the air supply pipe 13. At the same time, the mechanical seal 15 allows the air supply pipe 13 to rotate, preventing the connector pipe 10 from interfering with the rotation of the air supply pipe 13.

[0033] In this embodiment, as Figure 5 As shown, the filter includes an outer casing 11 and filter elements 20. Two filter elements 20 are provided and inserted parallel to each other into the outer casing 11. The two filter elements 20 have good filtration effect. When one filter element 20 is replaced, the other filter element 20 still plays a filtering role. Replacing the filter element 20 will not affect the filtration of air.

[0034] In this embodiment, as Figure 5 As shown, the filter element 20 has a sealing frame 19 on its side, and the sealing frame 19 is connected to a handle 12. The sealing frame 19 can surround the rubber sheet to improve the sealing effect between the sealing frame 19 and the outer box 11. The handle 12 makes it easy to pull out the filter element 20 and replace the filter element 20.

[0035] In this embodiment, as Figure 3 and Figure 4 As shown, the servo motor 7 is connected to the mounting frame 21, and the honeycomb molecular sieve 18 is placed inside the mounting frame 21. Round head screws are screwed onto the mounting frame 21 to block the honeycomb molecular sieve 18, thereby connecting the honeycomb molecular sieve 18 to the mounting frame 21. The drying oven 5 is equipped with a maintenance cover, which can be opened to replace the honeycomb molecular sieve 18.

[0036] Specifically, during use, the raw material is placed into the drying cylinder 1 through the feeding port 2. After the hot air blower 8 is started, the hot air blower 8 accelerates the air flow and heats the air to below 140°C. When the temperature reaches 140°C, the drying time does not exceed 4 hours. The hot air is sent to the air supply pipe 13 and the jet nozzle 16 through the three-way pipe 9 and the connector pipe 10. The air supply pipe 13 sends the hot air into the nozzle pipe 14.

[0037] The stirring motor 3 drives the nozzle pipe 14 to rotate through the air supply pipe 13. The nozzle pipe 14 stirs the raw materials. During the stirring process, hot air is sent between the raw materials to achieve uniform drying. The air discharged from the air outlet 4 contains a small amount of water vapor. The hot air containing a small amount of water vapor enters the drying chamber 5 and is dehumidified by the honeycomb molecular sieve 18. The hot air containing a small amount of water vapor returns to a dry state and flows into the filter element 20. The filtered hot air enters the hot air blower 8 for recycling and drying the raw materials again.

[0038] When dehumidification of the honeycomb molecular sieve 18 is required, air enters the drying chamber 5 through the three-way pipe 9. The separator 17 can block and separate the hot air with a small amount of water vapor from the dry hot air. The dry hot air heats and dehumidifies the honeycomb molecular sieve 18. The servo motor 7 controls the rotation of the honeycomb molecular sieve 18 to achieve comprehensive dehumidification of the honeycomb molecular sieve 18, ensuring that the honeycomb molecular sieve 18 always has a dehumidification function and a stable drying effect on the raw materials.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air circulation drying apparatus characterized by comprising: include: A drying cylinder (1) is provided, on which an agitator motor (3) is installed. Inside the drying cylinder (1) is an air supply pipe (13) connected to the output shaft of the agitator motor (3). Several nozzle pipes (14) are connected to the air supply pipe (13). A connector pipe (10) rotatably connected to the air supply pipe (13) is inserted into the bottom of the drying cylinder (1). A hot air blower (8) is connected to the connector pipe (10). A drying chamber (5) is provided, in which a honeycomb molecular sieve (18) is rotatably installed. A servo motor (7) for controlling the rotation of the honeycomb molecular sieve (18) is installed on the surface of the drying chamber (5). The inner wall of the drying chamber (5) is provided with partition strips (17) located on the left and right sides of the honeycomb molecular sieve (18). The drying chamber (5) is connected to the drying cylinder (1) and the hot air blower (8). A filter is connected between the hot air blower (8) and the drying chamber (5).

2. The hot air circulation drying apparatus according to claim 1, characterized by: The upper surface of the drying cylinder (1) is provided with a feeding port (2) and an air outlet (4), and the drying box (5) is provided with four interfaces (6), and the air outlet (4) is connected to the corresponding interface (6).

3. A hot air circulation drying apparatus according to claim 2, wherein: The hot air blower (8) has a three-way pipe (9) connected to its air outlet. The three-way pipe (9) is connected to the interface (6) and connector pipe (10) of the drying box (5).

4. The hot air circulating drying device according to claim 1, characterized in that: The lower surface of the connector tube (10) is connected to a jet head (16).

5. The hot air circulating drying device according to claim 1, characterized in that: A mechanical seal (15) is connected between the air supply pipe (13) and the connector pipe (10).

6. The hot air circulating drying device according to claim 1, characterized in that: The filter includes an outer casing (11) and filter elements (20), with two filter elements (20) inserted parallel to each other inside the outer casing (11).

7. A hot air circulating drying device according to claim 6, characterized in that: The filter element (20) has a sealing frame (19) on its side, and the sealing frame (19) is connected to a handle (12).

8. A hot air circulating drying device according to claim 1, characterized in that: The servo motor (7) is connected to the mounting frame (21), and the honeycomb molecular sieve (18) is placed inside the mounting frame (21).

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