Heated air circulation multi-stage belt type drying device

Abstract

The utility model relates to the technical field of drying devices, in particular to a hot air circulation multistage belt type drying device which comprises a machine shell, a plurality of conveying belt assemblies are arranged in the machine shell, each conveying belt assembly comprises a net-shaped belt body and two rotating shafts, the two rotating shafts are connected to the machine shell in a rotating mode, the net-shaped belt bodies surround the two rotating shafts, and the two rotating shafts are connected to the machine shell in a rotating mode. A plurality of first motors are installed at the rear end of the machine shell, the output ends of the first motors penetrate through the machine shell to be fixed to the rotating shaft, according to the hot air circulation multi-stage belt type drying device, by arranging the vibration mechanism, the double-shaft motor drives the oval block to rotate, the lifting rod conducts periodic reciprocating lifting motion under the action of the oval block and the spring, and therefore the drying efficiency is improved. And a contact column on the lifting rod drives the net-shaped belt body to move up and down rapidly and slightly, the vibration effect of the net-shaped belt body is achieved, the traditional Chinese medicinal materials conveyed above the net-shaped belt body are gradually spread under the vibration effect, and the problem that the drying efficiency is low due to stacking of the traditional Chinese medicinal materials is solved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically a hot air circulating multi-stage belt dryer. Background Technology

[0002] After harvesting, Chinese medicinal herbs need to be processed and dried in a timely manner for preservation and use. Due to the special effects of Chinese medicinal herbs, the drying process has a great impact on their properties and medicinal effects. Furthermore, since some medicinal herbs require pre-treatment steps such as steaming or boiling, resulting in a high moisture content, it is crucial to dry Chinese medicinal herbs quickly and preserve the effective components to the maximum extent. Currently, hot air circulating multi-stage belt drying devices are commonly used.

[0003] According to Chinese Patent Publication No. CN208139778U, a multi-stage belt dryer with hot air circulation includes a feeding mechanism, a drying mechanism, and a controller. The number of drying mechanisms is at least two. All drying mechanisms are connected in series, and the feed inlet of the drying mechanism at the first end is connected to the feeding mechanism. The drying mechanism is a belt dryer. The dryer includes a housing, a drive motor connected to the controller, and a conveyor belt installed inside the housing and connected to the drive motor. A hot air outlet connected to a heat source is provided at the bottom of the housing. The dryer also includes a heat exchanger with a hot air inlet and a waste heat air outlet. The hot air inlet of the heat exchanger is connected to the air outlet at the top of the housing.

[0004] However, there is a problem that when the conveyor belt transports Chinese medicinal materials, the stacking of the medicinal materials affects the drying effect. In order to address the above problems, this application designs a hot air circulating multi-stage belt drying device. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a hot air circulating multi-stage belt dryer.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage belt dryer with hot air circulation, comprising a housing, within which multiple conveyor belt assemblies are arranged. Each conveyor belt assembly includes a mesh belt and two rotating shafts, the two rotating shafts being rotatably connected to the housing. The mesh belt surrounds the two rotating shafts. Multiple first motors are installed at the rear end of the housing, the output ends of the first motors passing through the housing and fixed to the rotating shafts. A heating air inlet is fixed on the inner bottom wall of the housing. A heating circulation device is provided at the front end of the housing, communicating with the heating air inlet. A recovery pipe is connected to the heating circulation device, the other end of which communicates with the top end of the housing. A feed inlet is provided at the top. A vibration mechanism for vibrating the mesh belt is provided on the housing. The vibration mechanism includes two sliding grooves, which are symmetrically arranged on the front and rear inner walls of the housing. The sliding grooves extend upward through the housing. A lifting rod is slidably connected to the sliding groove. A spring is fixed on the inner bottom wall of the sliding groove. The other end of the spring is fixed to the bottom end of the lifting rod. A roller is rotatably connected to the top of the lifting rod. Multiple contact posts are rotatably connected to opposite sides of the lifting rod. The contact posts contact the inner ring wall of the mesh belt. A dual-axis motor is installed at the top of the housing. Elliptical blocks are fixed to both output ends of the dual-axis motor. The elliptical blocks contact the rollers.

[0009] Furthermore, the present invention is improved in that the plurality of conveyor belt assemblies are arranged in a vertical direction and the conveying directions of two adjacent conveyor belt assemblies are opposite, and the conveying end of the lowermost conveyor belt assembly penetrates the housing and is located on the outside.

[0010] To prevent the lifting rod from misaligning and swaying, this utility model is improved by fixing a limiting post on the inner bottom wall of the sliding groove, inserting the limiting post into the lifting rod and slidingly connecting it, and the spring being sleeved on the limiting post.

[0011] To reduce the impact of friction on the movement of the lifting rod, this invention is improved by having multiple rollers rotatably connected to the left and right side walls of the lifting rod, with the rollers contacting the inner wall of the sliding groove.

[0012] To facilitate real-time observation of the drying process, this invention features an improvement: a transparent window is provided at the front end of the casing.

[0013] To prevent accidental injury, this utility model is improved by fixing a protective shell at the top of the housing, which is located at the position of the elliptical block.

[0014] To facilitate centralized control and operation, this utility model is improved by installing a control panel at the front end of the housing, and the control panel is electrically connected to the first motor, the heating circulation device and the dual-shaft motor.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a multi-stage belt drying device with hot air circulation, which has the following beneficial effects:

[0017] This hot air circulating multi-stage belt dryer incorporates a vibration mechanism that drives a dual-axis motor to rotate an elliptical block. The lifting rod, under the action of the elliptical block and springs, performs periodic reciprocating lifting motion. This causes the contact columns on the lifting rod to move the mesh belt rapidly and slightly up and down, achieving a vibration effect on the mesh belt. This vibration gradually flattens the medicinal herbs transported above, solving the problem of low drying efficiency caused by stacking medicinal herbs. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the second main view structure of this utility model;

[0020] Figure 3 This is a first partial structural schematic diagram of the present invention in cross-section;

[0021] Figure 4 This is a second partial structural schematic diagram of the present invention in cross-section.

[0022] In the diagram: 1. Housing; 2. Mesh belt; 3. Rotating shaft; 4. First motor; 5. Heating air outlet; 6. Heating circulation device; 7. Recovery pipe; 8. Feed inlet; 9. Sliding groove; 10. Lifting rod; 11. Spring; 12. Roller; 13. Contact column; 14. Dual-axis motor; 15. Elliptical block; 16. Limiting column; 17. Roller; 18. Transparent window; 19. Protective shell; 20. Control panel. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4A multi-stage belt dryer with hot air circulation includes a housing 1. Multiple conveyor belt assemblies are installed inside the housing 1. Each conveyor belt assembly includes a mesh belt 2 and two rotating shafts 3. The two rotating shafts 3 are rotatably connected to the housing 1. The mesh belt 2 surrounds the two rotating shafts 3. Multiple first motors 4 are installed at the rear end of the housing 1. The output ends of the first motors 4 pass through the housing 1 and are fixed to the rotating shafts 3. A heating air inlet 5 is fixed on the inner bottom wall of the housing 1. A heating circulation device 6 is installed at the front end of the housing 1, communicating with the heating air inlet 5. A recovery pipe 7 is connected to the heating circulation device 6, and the other end of the recovery pipe 7 communicates with the top end of the housing 1. A feed inlet 8 is installed at the top end of the housing 1. A vibration mechanism for vibrating the mesh belt 2 is installed on the housing 1. The vibration mechanism includes a sliding groove 9. Two sliding grooves 9 are symmetrically arranged on the front and rear inner walls of the housing 1. The sliding grooves 9 extend upward through the housing 1. A lifting rod 10 is slidably connected to the sliding grooves 9. A spring 11 is fixed on the inner bottom wall of the sliding grooves 9. The other end of the spring 11 is fixed to the bottom end of the lifting rod 10. A roller 12 is rotatably connected to the top end of the lifting rod 10. Multiple contact posts 13 are rotatably connected to opposite sides of the lifting rod 10. The contact posts 13 contact the inner ring wall of the mesh belt 2. A dual-axis motor 14 is installed at the top of the housing 1. Elliptical blocks 15 are fixed to both output ends of the dual-axis motor 14. The elliptical blocks 15 contact the rollers 12. Multiple conveyor belt assemblies are arranged in the vertical direction, and the conveying directions of two adjacent conveyor belt assemblies are opposite. The conveying direction of the lowermost conveyor belt assembly extends through the housing 1 and is located on the outside.

[0025] In operation, the medicinal herbs enter through the feed inlet 8 and fall onto the uppermost conveyor belt assembly. The heating circulation device 6 is activated, employing existing mature technology. This device heats the air and delivers it to the heating vent 5 for discharge. Simultaneously, it draws in the hot air moving upwards through the recovery pipe 7, recycling and reheating it. The hot air discharged from the heating vent 5 heats the interior of the casing 1. Multiple first motors 4 are activated, causing the medicinal herbs to be conveyed by the uppermost mesh belt 2, moving to the other end and falling onto the lower mesh belt 2. The multiple first motors 4 also ensure that adjacent conveyor belt assemblies move in opposite directions, continuously transporting the medicinal herbs downwards until they are conveyed to the outside of the casing 1 by the lowermost conveyor belt assembly. During this process, the medicinal herbs are dried by the hot air. Simultaneously, a dual-shaft motor 14 is activated, driving two elliptical blocks 15 to rotate. Elliptical block 15 remains in contact with roller 12. When elliptical block 15 rotates from horizontal to vertical, it pushes roller 12 and lifting rod 10 downward along sliding groove 9, compressing spring 11. When elliptical block 15 rotates to horizontal again, spring 11 below lifting rod 10 releases potential energy, pushing lifting rod 10 upward. Thus, lifting rod 10 moves up and down repeatedly. Lifting rod 10 drives contact column 13 to move up and down repeatedly. Contact column 13 is located at the bottom of the upper part of the ring-shaped mesh belt 2, pushing it upward. Mesh belt 2 itself has a certain degree of extensibility and elasticity, thus achieving slight up and down swaying. During the process, mesh belt 2 rotates. After contacting it, contact column 13 is affected by friction and rotates, but this does not affect its ability to push mesh belt 2 upward. The Chinese medicinal materials on mesh belt 2 are shaken, causing the piled Chinese medicinal materials to gradually approach a flat state.

[0026] In actual use, it was found that when the lifting rod 10 moves on the sliding groove 9, it may misalign and shake. In order to avoid the above problem, in this embodiment, a limiting post 16 is fixed on the inner bottom wall of the sliding groove 9. The limiting post 16 is inserted into the lifting rod 10 and slidably connected to it. The spring 11 is sleeved on the limiting post 16.

[0027] In actual use, it was found that the lifting rod 10 was affected by the contact friction with the sliding groove 9 when it moved up and down, resulting in uneven movement. In order to solve the above problem, in this embodiment, multiple rollers 17 are rotatably connected to the left and right side walls of the lifting rod 10, and the rollers 17 are in contact with the inner wall of the sliding groove 9.

[0028] In actual use, it was found that in order to observe the drying situation in real time, a transparent window 18 is provided at the front end of the housing 1 in this embodiment.

[0029] In actual use, it was found that operators may accidentally touch the contact position between the elliptical block 15 and the roller 12, causing injury. In order to avoid the above problem, in this embodiment, the top of the housing 1 is fixed with a protective shell 19 at the position of the elliptical block 15.

[0030] In actual use, it was found that in order to centrally and conveniently control the motor and other components, in this embodiment, a control panel 20 is installed at the front end of the housing 1. The control panel 20 is electrically connected to the first motor 4, the heating circulation device 6 and the dual-shaft motor 14.

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] 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 circulating multi-stage belt dryer, comprising a housing (1), characterized in that: The housing (1) is equipped with multiple conveyor belt assemblies, each including a mesh belt (2) and two rotating shafts (3). The two rotating shafts (3) are rotatably connected to the housing (1), and the mesh belt (2) surrounds the two rotating shafts (3). Multiple first motors (4) are installed at the rear end of the housing (1), and the output ends of the first motors (4) pass through the housing (1) and are fixed to the rotating shafts (3). A heating air inlet (5) is fixed on the inner bottom wall of the housing (1). A heating circulation device (6) is provided at the front end of the housing (1), and the heating circulation device (6) is connected to the heating air inlet (5). A recovery pipe (7) is connected to the heating circulation device (6), and the other end of the recovery pipe (7) is connected to the top end of the housing (1). A feed inlet (8) is provided at the top end of the housing (1). The housing (1) is equipped with a vibrating mesh belt. (2) The vibration mechanism includes a sliding groove (9). Two sliding grooves (9) are provided and symmetrically opened on the front and rear inner walls of the housing (1). The sliding groove (9) extends upward through the housing (1). A lifting rod (10) is slidably connected to the sliding groove (9). A spring (11) is fixed on the inner bottom wall of the sliding groove (9). The other end of the spring (11) is fixed to the bottom end of the lifting rod (10). A roller (12) is rotatably connected to the top end of the lifting rod (10). Multiple contact posts (13) are rotatably connected to the opposite side of the lifting rod (10). The contact posts (13) contact the inner ring wall of the mesh belt (2). A dual-axis motor (14) is installed at the top end of the housing (1). An elliptical block (15) is fixed to each of the two output ends of the dual-axis motor (14). The elliptical block (15) contacts the roller (12).

2. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: The multiple conveyor belt assemblies are arranged in the vertical direction and the conveying directions of two adjacent conveyor belt assemblies are opposite. The conveying direction of the lowermost conveyor belt assembly penetrates the casing (1) and is located on the outside.

3. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: A limiting post (16) is fixed on the inner bottom wall of the sliding groove (9). The limiting post (16) is inserted into the lifting rod (10) and slidably connected to it. The spring (11) is sleeved on the limiting post (16).

4. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: Multiple rollers (17) are rotatably connected to the left and right side walls of the lifting rod (10), and the rollers (17) are in contact with the inner wall of the sliding groove (9).

5. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: The front end of the housing (1) is provided with a transparent window (18).

6. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: The top of the housing (1) is fixed with a protective shell (19) at the position of the elliptical block (15).

7. The hot air circulating multi-stage belt dryer according to claim 1, characterized in that: A control panel (20) is installed at the front end of the housing (1). The control panel (20) is electrically connected to the first motor (4), the heating circulation device (6), and the dual-axis motor (14).

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