Microwave vacuum dryer with preheating treatment function

Abstract

The utility model provides a microwave vacuum drier with a preheating treatment function, which comprises a drier body and a preheating mechanism, the preheating mechanism comprises a support, a preheating bin, a material containing plate, a hot air assembly and a material guide channel, the preheating bin is arranged on the support, and the material containing plate is arranged on the support. The material containing plate is arranged in the preheating bin and can axially rotate, the hot air assembly is arranged in the preheating bin, and the material guiding channel communicates with the preheating bin and the drying machine body. According to the utility model, centralized preheating of materials can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of food, health food and medicine production, and in particular to a microwave vacuum drying machine with a preheating treatment function. Background Art

[0002] The widely used equipment for sterilizing materials such as Chinese medicinal materials and Chinese medicinal powders is mainly electric heating or heat conduction for drying. In actual use, when encountering materials with poor thermal conductivity, it takes a long time to complete drying, which increases time cost and reduces work efficiency. The Chinese utility model patent CN206478948U discloses a microwave vacuum dryer pretreatment feeding device, which includes a feeding device arranged in the microwave vacuum dryer, the feeding device includes a feeding hopper, a feeder arranged below the feeding hopper, and an electromagnetic valve arranged below the feeder. The feeding hopper is connected to a material conveying device, and the material conveying device includes a preheating chamber and a conveyor belt arranged in the preheating chamber. It uses the preheating chamber to connect the hot air circulation system to preheat the materials on the conveyor belt to reduce the drying time of the microwave vacuum dryer, improve the drying efficiency, and save energy. However, when it is applied to actual production, since the material is preheated when it is conveyed on the conveyor belt, its preheating area is too dispersed, so that the preheating effect of the material is not very ideal. Therefore, how to preheat the materials more intensively is a problem that needs to be solved. Summary of the invention

[0003] The utility model aims to solve one of the above-mentioned technical problems and provides a microwave vacuum dryer with a preheating treatment function, which can realize centralized preheating of materials.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A microwave vacuum dryer with a preheating treatment function comprises a dryer body and a preheating mechanism, wherein the preheating mechanism comprises a bracket, a preheating bin, a material holding plate, a hot air component and a material guiding channel, wherein the preheating bin is mounted on the bracket, the material holding plate is mounted in the preheating bin and the material holding plate can rotate axially, the hot air component is mounted in the preheating bin, and the material guiding channel connects the preheating bin with the dryer body.

[0006] Furthermore, the material holding plate includes a flat plate and an inclined ring plate, the flat plate is installed in the preheating bin and the material holding plate can rotate axially; the inclined ring plate is connected to the periphery of the flat plate and the inclined ring plate is inclined away from the outer edge of the flat plate and extends toward the ground, and there is a gap between the outer edge of the inclined ring plate away from the flat plate and the inner wall of the preheating bin; both the flat plate and the inclined ring plate are provided with air holes; the hot air assembly is installed on the side of the flat plate facing the bracket.

[0007] Furthermore, the hot air assembly includes a hot air blower and a top exhaust pump, the hot air blower is installed on the side of the flat plate facing the bracket, and the top exhaust pump is installed on the top of the preheating chamber.

[0008] Furthermore, a material guide plate is provided in the preheating bin, the periphery of the material guide plate is connected to the inner wall of the preheating bin and the material guide plate is inclined toward the material guide channel.

[0009] Furthermore, it also includes a feeding hopper, which is installed on the top of the preheating bin and is arranged corresponding to the material holding plate.

[0010] Furthermore, the dryer body is provided with a material baffle plate at the entrance of the material guide channel.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0012] When using the above-mentioned microwave vacuum dryer with preheating function, the pre-dried material is placed on the material holding plate, and the hot air component blows hot air toward the material holding plate to preheat the material. When formal drying is required, the material holding plate is rotated axially rapidly, and the material performs centrifugal motion due to the rapid rotation of the material holding plate and flies off the material holding plate to the outside of the material holding plate, and finally is guided into the dryer body through the material guide channel for formal drying. It can be seen that the material is preheated only in the preheating bin, which can achieve centralized preheating of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the microwave vacuum dryer with preheating treatment function in the utility model.

[0014] Figure 2 for Figure 1 Schematic diagram of the installation of the middle material plate.

[0015] Figure 3 for Figure 1 Installation cross-section of the preheating mechanism.

[0016] In the attached drawings, 1-dryer body, 2-preheating mechanism, 21-bracket, 22-preheating bin, 23-material holding plate, 231-flat plate, 232-inclined ring plate, 233-air hole, 234-motor, 24-material guide channel, 31-hot air blower, 32-top exhaust pump, 4-material guide plate, 5-feeding hopper, 6-material baffle plate, 7-cylinder, 8-guide rail. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments 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 in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] like Figures 1 to 3 As shown, a preferred embodiment of the utility model provides a microwave vacuum dryer with a preheating treatment function, including a dryer body 1 and a preheating mechanism 2. The dryer body 1 is a microwave vacuum dryer in the prior art. In this embodiment, the microwave vacuum dryer is provided with a feed inlet on the side facing the preheating mechanism 2, and the remaining structure is the same as the microwave vacuum dryer in the prior art. The preheating mechanism 2 includes a bracket 21, a preheating bin 22, a material holding plate 23, a hot air component and a material guide channel 24. The preheating bin 22 is mounted on the bracket 21, the material holding plate 23 is mounted in the preheating bin 22 and the material holding plate 23 can rotate axially, the hot air component is mounted in the preheating bin 22, and the material guide channel 24 connects the preheating bin 22 with the dryer body 1.

[0021] When using the microwave vacuum dryer with preheating function, the pre-dried material is placed on the material holding plate 23, and the hot air assembly blows hot air toward the material holding plate 23 to preheat the material. When formal drying is required, the material holding plate 23 is rapidly rotated axially, and the material performs centrifugal motion due to the rapid rotation of the material holding plate 23 and flies off the material holding plate 23 to the outside of the material holding plate 23, and finally is guided into the dryer body 1 through the material guide channel 24 for formal drying. It can be seen that the material is preheated only in the preheating bin 22, which can achieve centralized preheating of the material.

[0022] In this embodiment, the height of the bracket 21 is greater than the height of the feed opening, so that the material guide channel 24 is inclined from the preheating chamber 22 toward the feed opening, thereby allowing the material to be guided to the feed opening through the material guide channel 24.

[0023] In this embodiment, the material holding plate 23 includes a flat plate 231 and an inclined ring plate 232. The flat plate 231 is installed in the preheating bin 22 and the material holding plate 23 can rotate axially. Specifically, the preheating bin 22 is cylindrical, and a motor 234 and a corresponding reducer are installed at the bottom of the preheating bin 22. The connection and application of the motor 234 and the reducer are well known to those skilled in the art and are not described here. The flat plate 231 is in the shape of a circular plate, and the center of the flat plate 231 is fixedly connected to the working shaft of the motor 234, and the motor 234 drives the flat plate 231 to rotate axially. The inclined ring plate 232 is connected to the periphery of the flat plate 231 and the inclined ring plate 232 is inclined away from the outer edge of the flat plate 231 and extends toward the ground. There is a gap between the outer edge of the inclined ring plate 232 away from the flat plate 231 and the inner wall of the preheating bin 22. The flat plate 231 and the inclined ring plate 232 are both provided with air holes 233. When the motor 234 drives the flat plate 231 to rotate axially quickly, the material flies away from the flat plate 231 by centrifugal motion. Then, under the inclined guidance of the inclined ring plate 232, the material falls from the gap between the inclined ring plate 232 and the inner wall of the preheating bin 22 and finally enters the material guide channel 24.

[0024] The hot air assembly is installed on the side of the flat plate 231 facing the bracket 21. Specifically, the hot air assembly includes a hot air blower 31 and a top exhaust pump 32. The hot air blower 31 is installed on the side of the flat plate 231 facing the bracket 21, and the top exhaust pump 32 is installed on the top of the preheating bin 22. When the hot air blower 31 is in operation, the hot air preheats the material through the air holes 233, and the hot air is finally extracted from the inside of the preheating bin 22 through the top exhaust pump 32.

[0025] In this embodiment, a material guide plate 4 is provided in the preheating bin 22, the periphery of the material guide plate 4 is connected to the inner wall of the preheating bin 22 and the material guide plate 4 is inclined toward the material guide channel 24, and the top surface of the material guide plate 4 is located between the lower edge of the inclined ring plate 232 and the bottom surface of the preheating bin 22. After falling from the inclined ring plate 232, the material falls onto the material guide plate 4 and is guided toward the material guide channel 24 through the material guide plate 4.

[0026] In this embodiment, the microwave vacuum dryer with preheating function further includes a feed hopper 5, which is installed on the top of the preheating bin 22 and is arranged corresponding to the material holding plate 23. Specifically, the bottom of the feed hopper 5 extends radially along the flat plate 231 and the feed hopper 5 is connected to the preheating bin 22. The feed hopper 5 is used to put materials into the preheating bin 22. The bottom of the feed hopper 5 extends radially along the flat plate 231, so that the materials can be laid on the flat plate 231 more evenly.

[0027] In this embodiment, the dryer body 1 is provided with a material baffle plate 6 at the entrance corresponding to the material guide channel 24. Specifically, guide rails 8 are provided on opposite sides of the feed inlet. The material baffle plate 6 is slidably arranged in the guide rails 8. A cylinder 7 is provided at one end of the guide rail 8. The working rod of the cylinder 7 is connected to the material baffle plate 6. The cylinder 7 drives the material baffle plate 6 to move back and forth along the guide rail 8. When it is necessary to feed the material into the dryer body 1, the cylinder 7 pulls the material baffle plate 6 toward the cylinder 7 body, so that the feed inlet is exposed, and the material enters the dryer body 1 from the feed inlet; when it is necessary to close the feed inlet, the cylinder 7 pushes the material baffle plate 6 in the direction away from the cylinder 7.

[0028] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A microwave vacuum dryer with preheating function, characterized in that: The invention comprises a dryer body (1) and a preheating mechanism (2), wherein the preheating mechanism (2) comprises a bracket (21), a preheating bin (22), a material holding plate (23), a hot air component and a material guiding channel (24), wherein the preheating bin (22) is mounted on the bracket (21), the material holding plate (23) is mounted in the preheating bin (22) and the material holding plate (23) is axially rotatable, the hot air component is mounted in the preheating bin (22), and the material guiding channel (24) connects the preheating bin (22) with the dryer body (1).

2. The microwave vacuum dryer with preheating function as claimed in claim 1, characterized in that: The material holding plate (23) comprises a flat plate (231) and an inclined ring plate (232); the flat plate (231) is installed in the preheating chamber (22) and the material holding plate (23) is capable of axial rotation; the inclined ring plate (232) is connected to the periphery of the flat plate (231) and the inclined ring plate (232) is inclined away from the outer edge of the flat plate (231) and extends toward the ground, and there is a gap between the outer edge of the inclined ring plate (232) away from the flat plate (231) and the inner wall of the preheating chamber (22); both the flat plate (231) and the inclined ring plate (232) are provided with air holes (233); the hot air component is installed on the side of the flat plate (231) facing the bracket (21).

3. A microwave vacuum dryer with preheating function as claimed in claim 2, characterized in that: The hot air component comprises a hot air blower (31) and a top exhaust pump (32); the hot air blower (31) is installed on the side of the flat plate (231) facing the bracket (21); and the top exhaust pump (32) is installed on the top of the preheating chamber (22).

4. The microwave vacuum dryer with preheating function as claimed in claim 2, characterized in that: A material guide plate (4) is provided in the preheating bin (22), the periphery of the material guide plate (4) is connected to the inner wall of the preheating bin (22), and the material guide plate (4) is inclined towards the material guide channel (24).

5. The microwave vacuum dryer with preheating function as claimed in claim 1, characterized in that: It also includes a feeding hopper (5), which is installed on the top of the preheating bin (22) and is arranged corresponding to the material holding plate (23).

6. The microwave vacuum dryer with preheating function as claimed in claim 1, characterized in that: The dryer body (1) is provided with a material blocking plate (6) movably corresponding to the entrance of the material guiding channel (24).

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