CN-224230606-U - Microwave hot air cooperative drying device for cereal grains

CN224230606UCN 224230606 UCN224230606 UCN 224230606UCN-224230606-U

Abstract

A microwave hot air cooperative drying device for cereal grains belongs to the technical field of grain machinery. The device comprises a feeding unit, a drying unit, a cooling unit, a discharging unit and a discharging unit, wherein the screw conveyor is respectively connected with the feeding mechanism and the first discharging mechanism, the drying unit is characterized in that an upper belt conveyor is horizontally arranged in an upper box body, a plurality of microwave generating mechanisms are uniformly distributed at the top of the upper box body, a heat pump is positioned outside the upper box body and communicated with the upper box body through a pipeline, the cooling unit is characterized in that a lower belt conveyor is horizontally arranged in a lower box body, a blower is arranged outside the lower box body and communicated with the lower box body through a pipeline, and the discharging unit comprises a distributing mechanism and a discharging pipe. The utility model combines the advantages of hot air drying and microwave drying, and improves the uniformity and the working efficiency of grain drying.

Inventors

WANG XIANG
YAO XUEJUN
WANG ZHONG

Assignees

扬州市凯耀机械有限公司

Dates

Publication Date: 20260512
Application Date: 20250430

Claims (8)

1. The utility model provides a cereal grain is with microwave hot air cooperative drying device which characterized in that includes: The feeding unit comprises a feeding mechanism, a screw conveyor and a first blanking mechanism, wherein the screw conveyor is obliquely arranged and is respectively connected with the feeding mechanism at the bottom end and the first blanking mechanism at the top end; The drying unit comprises an upper box body, an upper belt conveyor, a plurality of microwave generating mechanisms and a heat pump, wherein the upper belt conveyor is horizontally arranged in the upper box body, the top and the bottom of the upper box body are respectively provided with a feed inlet and a discharge outlet, and the first discharging mechanism is respectively connected with the discharge outlet of the screw conveyor and the feed inlet of the upper box body; The cooling unit comprises a lower box body, a lower belt conveyor, an air blower and a second discharging mechanism, wherein the top and the bottom of the lower box body are respectively provided with a feed inlet and a discharge outlet, and the lower belt conveyor is horizontally arranged in the lower box body; The discharging unit comprises a distributing mechanism and a discharging pipe, wherein a feeding hole of the distributing mechanism is connected with a discharging hole of the lower box body, and the discharging hole of the distributing mechanism is respectively connected with the feeding mechanism and the discharging pipe.
2. The microwave and hot air cooperative drying device for cereal grains according to claim 1, wherein a second hollow interlayer is arranged at the bottom of the upper box body, a second air inlet is arranged in the second hollow interlayer, a second air outlet is arranged at the top of the upper box body, the heat pump is connected with the second air inlet through a pipeline, and a plurality of ventilation holes are formed in the second hollow interlayer so as to blow hot air into the upper box body.
3. The microwave and hot air cooperative drying device for cereal grains according to claim 2, wherein the outer cylinder of the screw conveyor is provided with a first hollow interlayer, the bottom end and the top end of the first hollow interlayer are respectively provided with a first air inlet and a first air outlet, and the second air outlet is connected with the first air inlet through a pipeline.
4. A microwave and hot air cooperative drying device for cereal grains according to claim 3, wherein a third hollow interlayer is arranged at the top of the lower box body, a third air inlet is arranged in the third hollow interlayer, a third air outlet is arranged at the end part of the lower box body, the blower is connected with the third air inlet through a pipeline, and a plurality of ventilation holes are formed in the third hollow interlayer so as to blow cold air into the lower box body.
5. A microwave and hot air cooperative drying device for cereal grains according to claim 3, wherein the pipelines of the first air outlet and the second air outlet are respectively provided with a filtering device.
6. The microwave and hot air cooperative drying device for cereal grains according to claim 1, wherein a plurality of first rollers with rake teeth are arranged in the upper box body and uniformly distributed above the upper belt conveyor, and a plurality of second rollers with rake teeth are arranged in the lower box body and uniformly distributed above the lower belt conveyor.
7. The microwave and hot air cooperative drying device for cereal grains according to claim 1, wherein the first blanking mechanism and the second blanking mechanism respectively comprise a blanking channel, an adjusting bolt, a baffle plate and an adjusting nut, the top end of the baffle plate is hinged to the inner wall of the blanking channel, the adjusting nut is fixed at the wall thickness of the blanking channel, the adjusting bolt is in threaded connection with the adjusting nut, the end part of the adjusting bolt is connected with an inclined surface block, and the inclined surface of the inclined surface block abuts against the outer side wall of the baffle plate.
8. The microwave and hot air cooperative drying device for cereal grains according to claim 1, wherein the material distributing mechanism comprises two discharging channels, two valve plates, two rotating shafts and two driving motors, wherein the discharging channels, the two valve plates, the two rotating shafts and the two driving motors are connected in parallel, the two valve plates are respectively assembled in the corresponding discharging channels through the rotating shafts in a rotating mode, and the two driving motors are respectively connected with the two rotating shafts in a driving mode so as to control the opening degree of the valve plates.

Description

Microwave hot air cooperative drying device for cereal grains Technical Field The utility model relates to a microwave and hot air cooperative drying device for cereal grains, and belongs to the technical field of grain machinery. Background The moisture content of grains such as rice, wheat, corn and the like after harvesting is about 20-30%, and drying is an important link after grain delivery, if not timely dried until safe moisture is stored, the grains are easy to spoil and mildew. The traditional drying mode mainly adopts natural airing and drying equipment, and the drying equipment mainly comprises hot air drying and microwave drying. Natural airing is affected by weather factors, manual tedding is needed, efficiency is low, time and labor are wasted, grain is dried by hot air drying in a hot air blowing mode, drying time is long, efficiency is low, and drying efficiency is high by microwave drying, but drying is uneven, and local temperature is easy to be overhigh. In addition, in continuous drying equipment, how to turn the grains is still a key to influence the drying uniformity. In the field of mechanical transmission, a technology of driving a plurality of parallel rotating shafts by using a synchronous belt and assisting with a tensioning wheel is mature (as shown in CN 216547978U). However, the prior art has not given any clear teaching for its application to the drying process of cereal grains. Disclosure of utility model The utility model aims to overcome the defects in the prior art, and provides a microwave and hot air cooperative drying device for cereal grains, which combines the advantages of hot air drying and microwave drying and improves the uniformity and the working efficiency of grain drying. The technical scheme of the utility model is as follows: the microwave hot air cooperative drying device for cereal grains is characterized by comprising a feeding unit, a drying unit, a cooling unit and a discharging unit, wherein the structures of the feeding unit, the drying unit, the cooling unit and the discharging unit are as follows: the feeding unit comprises a feeding mechanism, a screw conveyor and a first blanking mechanism, wherein the screw conveyor is obliquely arranged and is respectively connected with the feeding mechanism at the bottom end and the first blanking mechanism at the top end; The drying unit comprises an upper box body, an upper belt conveyor, a plurality of microwave generating mechanisms and a heat pump, wherein the upper belt conveyor is horizontally arranged in the upper box body, the top and the bottom of the upper box body are respectively provided with a feed inlet and a discharge outlet, and the first discharging mechanism is respectively connected with the discharge outlet of the screw conveyor and the feed inlet of the upper box body; The cooling unit comprises a lower box body, a lower belt conveyor, an air blower and a second discharging mechanism, wherein the top and the bottom of the lower box body are respectively provided with a feed inlet and a discharge outlet, and the lower belt conveyor is horizontally arranged in the lower box body; The discharging unit comprises a distributing mechanism and a discharging pipe, wherein a feeding hole of the distributing mechanism is connected with a discharging hole of the lower box body, and the discharging hole of the distributing mechanism is respectively connected with the feeding mechanism and the discharging pipe. By adopting the scheme, grains firstly enter from the feeding mechanism and are lifted to the first discharging mechanism at the top of the feeding mechanism by the screw conveyor, then enter into the upper box body through the first discharging mechanism for drying, are conveyed to the discharge hole of the upper box body by the upper belt conveyor, enter into the lower box body through the second discharging mechanism for cooling, are conveyed to the discharge hole of the lower box body by the lower belt conveyor, and finally are discharged through the discharge unit. In the upper box body, along the conveying direction of the upper belt conveyor, a plurality of microwave generating mechanisms are started to dry grains, and the heat pump is started to send hot air into the upper box body through a pipeline to dry grains. The hot air drying and the microwave drying are combined, so that the aim of rapid temperature rise can be fulfilled, the aim of uniform drying can be fulfilled, and the drying uniformity and the drying efficiency are improved as a whole. In the lower case, cold air (room temperature) is fed into the case by a blower to cool the dried grains. Temperature sensors and moisture sensors are respectively arranged in the upper box body and the lower box body, the working states of the heat pump, the microwave generating mechanism and the blower are controlled through the temperature sensors, and the moisture state of grains in the box body is known through the moisture sensors. If