CN115854681A

CN115854681A - Portable hot air drying system and drying method for rice processing

Info

Publication number: CN115854681A
Application number: CN202211469249.8A
Authority: CN
Inventors: 宝音; 徐新然
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-28

Abstract

The invention belongs to the technical field of food processing, and particularly relates to a portable hot air drying system and a drying method for rice processing. According to the portable hot air drying system and the drying method for rice processing, through the arrangement of the screening mechanism, the vibration of the vibration motor is used as a vibration source, so that materials are thrown up on the screening plate and move forwards in a linear manner, the materials uniformly enter a feed inlet of the screening box from an unloading cloth bag below the dryer, and screened objects of various specifications are generated through fine screening holes and coarse screening holes formed in the surface of the screening plate and are discharged from respective outlets, and the purposes of screening and grading the materials are achieved.

Description

Portable hot air drying system and drying method for rice processing

Technical Field

The invention relates to the technical field of food processing, in particular to a portable hot air drying system and a drying method for rice processing.

Background

In the course of working of rice, it is one of very important process to dry, carries out drying process to the rice, can prevent effectively that the rice from mildening and rot and influencing its edible safety, and the effect of stoving is influencing the quality of rice processing finished product to a certain extent, and the efficiency of stoving is then the efficiency of directly deciding rice processing, and at present, current drying equipment adopts the mode of high temperature drying to dry mostly.

Although the drying device is widely used, there are some problems in the rice processing process:

1. the existing drying device has high energy consumption, is overstaffed in overall structure and is not convenient and fast to use;

2. present drying equipment is after the stoving, often need the manual work to take out the rice, the repeated operation, work burden is great, and because current drying equipment lacks the function to stoving back rice autofilter, make at every turn dry the completion back, still must the manual work carry the rice after accomplishing of drying to next screening process and filter the classification, but this screening mode is not only big to staff intensity of labour, can't realize continuity of operation moreover, degree of automation is low, and then lead to rice production efficiency to hang down.

Disclosure of Invention

Based on the technical problems of the existing drying equipment, the invention provides a portable hot air drying system and a drying method for rice processing.

The invention provides a portable hot air drying system for rice processing, which comprises an installation frame and a supporting block, wherein the installation frame is installed on the ground, the supporting block is positioned on the outer side of the installation frame, a drying box is fixedly sleeved on the upper surface of the supporting block, and a heat drawing mechanism, a speed change mechanism, a stirring mechanism and a screening mechanism are respectively arranged on the upper surface of the installation frame from top to bottom.

The heat drawing mechanism is used for drawing heat generated by the heating equipment into the drying box, and hot air drying is realized on rice in the drying box.

Wherein, rabbling mechanism is used for to being located the rice of stoving incasement carries out stirring to realize that the rice is heated even action.

The speed change mechanism is used for realizing online stepless speed change action on the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism.

Wherein, screening mechanism is used for realizing the action of vibration type screening to the rice after drying.

Preferably, the heat drawing mechanism comprises a heat source box arranged on the right side surface of the upper end of the supporting block, an air supply pipe with one end communicated with the heating equipment is fixedly communicated with the outer surface of the heat source box, a rotating rod with one end extending to the lower surface of the heat source box is arranged at the center of the inner bottom wall of the heat source box through a bearing, and drawing holes distributed in an annular array are formed in the outer surface of the rotating rod, which is positioned in the heat source box.

Preferably, the surface mounting that the dwang is located the heat source incasement has cup jointed and has drawn the flabellum, drives draw the flabellum and produce suction after rotating, to lieing in the action of drawing is realized to the heat in the heat source incasement to will be located heat in the heat source incasement draws extremely through drawing the hole in the dark lane of dwang.

Preferably, speed change mechanism includes hold-in range, variable speed cylinder and meshing tooth, the flexible drive meshing tooth of variable speed cylinder realizes meshing back with the hold-in range, drives the hold-in range edge remove on the length direction of mounting bracket to it contracts the action through variable speed cylinder one and realizes the variable speed to the removal speed of hold-in range to stretch out.

The outer fixed surface of stoving case has cup jointed driving motor, driving motor's output shaft has the transmission shaft through shaft coupling fixed mounting, the rolling disc that is the octagon shape has all been cup jointed fixedly to the surface of transmission shaft and dwang.

Preferably, the variable speed cylinder is fixedly installed on the radial direction of the rotating disc, the meshing teeth are fixedly installed on the outer end of a piston rod of the variable speed cylinder to achieve radial expansion, and the inner top wall of the drying box is communicated with a humidity exhaust pipe with a one-way valve.

Preferably, the last fixed surface of supporting shoe installs the former storage bucket through conveying pipeline and stoving case intercommunication, rabbling mechanism is including installing on the bull stick surface and being seven groups stirring paddle leaf that linear array distributes, and five wherein are adjacent equal fixedly connected with is used for realizing the scraper blade of striking off the action to stoving incasement wall between the stirring paddle leaf, driving motor passes through behind the meshing tooth drive hold-in range motion, drives dwang and dwang surface connection's rolling disc and stirring paddle leaf realize rotary motion, and then realize the stirring action to the rice that lies in the stoving incasement.

Preferably, the external fixed surface of stoving case installs the striker cylinder, the piston rod outer end fixedly connected with telescopic link of striker cylinder, the one end fixedly connected with of telescopic link with striker plate inner wall sliding connection's of stoving case striker plate, the striker plate that striker cylinder flexible drive telescopic link and telescopic link one end are connected moves on the length direction of striker cylinder to stretch one through the striker cylinder and contract the action and realize the action of unloading to the rice after the stoving incasement stoving, the external fixed surface of stoving case installs temperature sensor, temperature sensor and striker cylinder electric connection.

Preferably, the sack of unloading is installed to the discharge gate of stoving case, screening mechanism is including installing at the mounting bracket upper surface and being evenly distributed's damping spring, damping spring's one end fixedly connected with screening case, the screening board is installed through the bolt to the inner wall of screening case, the surface of screening board is seted up respectively and is the fine screening hole and the coarse screening hole that linear array distributes, the hole diameter in fine screening hole is less than the hole diameter in coarse screening hole.

Preferably, the lower surface of the discharging cloth bag is connected with the upper surface of the screening box, the vibrating motors which are symmetrically distributed are fixedly mounted on the lower surface of the screening box, a first discharging opening for realizing discharging action on rice falling from the fine screening hole and a second discharging opening for realizing discharging action on rice falling from the coarse screening hole are respectively formed in the inner bottom wall of the screening box from left to right, and a controller for controlling the heat drawing mechanism, the speed change mechanism, the stirring mechanism and the screening mechanism to operate is fixedly mounted on the front side of the supporting block.

Preferably, a drying method of the portable hot air drying system for rice processing is provided, and the specific drying method comprises the following steps: firstly, pouring rice to be dried into a raw material barrel, and conveying the rice to a drying box through a conveying pipe;

secondly, the controller controls the heating equipment and the driving motor to start, and heat generated by the operation of the heating equipment is conveyed into the heat source box through the air supply pipe, so that the rice is conveniently dried subsequently;

the rolling disc that driving motor drive transmission shaft and transmission shaft one end are connected rotates, through the meshing of meshing tooth and hold-in range, and then drives the multiunit stirring paddle leaf of dwang, dwang surface connection and draws the flabellum and realize rotary motion, does in its concrete motion process:

the suction fan blades generate suction force after rotating, and the suction action is realized on the heat in the heat source box, so that the heat in the heat source box is sucked into the blind passage of the rotating rod through the suction holes and then flows out of the bottom end of the blind passage of the rotating rod, and then the hot air drying of the rice in the drying box is realized from bottom to top;

after the stirring paddle rotates, stirring action is carried out on the rice in the drying box, the rice is driven to be in a flowing state all the time in the drying box, so that the rice is heated more uniformly, and the scraper is driven to carry out scraping action on the rice adhered to the inner wall of the drying box while the stirring paddle rotates;

when the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism need to be adjusted, the moving speed of the synchronous belt is changed through the stretching and shrinking actions of the speed changing cylinder, and further the online stepless speed change is realized on the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism;

after the rice is dried by hot air, the stopping cylinder stretches and retracts to drive the telescopic rod and the stopping plate connected with one end of the telescopic rod to move along the length direction of the stopping cylinder, and the automatic discharging action of the dried rice in the drying box is realized through the stretching and retracting actions of the stopping cylinder;

and fifthly, using vibration of a vibration motor as a vibration source to throw the materials on the screening plate and simultaneously move forwards in a linear manner, enabling the materials to uniformly enter a feed inlet of the screening box from a discharge cloth bag below the dryer, generating oversize products and undersize products with various specifications through fine screening holes and coarse screening holes formed in the surface of the screening plate, and then respectively discharging the oversize products and the undersize products from respective outlets, thereby achieving the purpose of screening and grading the materials.

The beneficial effects of the invention are as follows:

1. through setting up heat and drawing mechanism, speed change mechanism, rabbling mechanism, adopt by a power supply drive, not only energy-conserving energy consumption, reduced manufacturing cost, still reduced the fault probability of power supply, make three mechanism's combination degree simultaneously, compact structure.

2. Through setting up screening mechanism, utilize vibrating motor excitation as the vibration source, make the material by throwing on the screening board, make rectilinear motion forward simultaneously, after the material evenly got into the feed inlet of screening case from the sack of unloading of drying-machine below, produced oversize thing, the undersize thing of several specifications through the thin screening hole and the coarse screening hole that the screening board surface was seted up, and the export of following is respectively again discharged, and then reaches the purpose of screening and grading to the material.

Drawings

FIG. 1 is a schematic diagram of a portable hot air drying system and a drying method for rice processing;

FIG. 2 is a half-sectional perspective view of a drying box structure of the portable hot air drying system and drying method for rice processing;

FIG. 3 is a perspective view of a speed change mechanism of the portable hot air drying system and the drying method for rice processing;

FIG. 4 is a perspective view of a screening mechanism of the portable hot air drying system and drying method for rice processing;

FIG. 5 is an exploded view of a screening mechanism of a portable hot air drying system and a drying method for rice processing;

fig. 6 is a sectional view of a rotating rod structure of the portable hot air drying system and drying method for rice processing.

In the figure: 1. a mounting frame; 2. a support block; 3. a drying box; 4. a heat source box; 41. an air supply pipe; 42. rotating the rod; 43. a tapping hole; 44. drawing fan blades; 5. a synchronous belt; 51. a variable speed cylinder; 52. meshing teeth; 53. a drive motor; 54. a drive shaft; 55. rotating the disc; 56. a raw material barrel; 6. a stirring paddle; 61. a squeegee; 62. a material blocking cylinder; 63. a telescopic rod; 64. a striker plate; 65. a temperature sensor; 66. a discharging cloth bag; 7. a damping spring; 71. a screening box; 72. screening the plate; 73. fine screening wells; 74. coarse screening of the pores; 75. a vibration motor; 76. a first discharge opening; 77. a second discharge opening; 78. and a controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example one

Referring to fig. 1-6, a portable hot air drying system for rice processing comprises an installation frame 1 installed on the ground and a supporting block 2 located outside the installation frame 1, wherein a drying box 3 is fixedly sleeved on the upper surface of the supporting block 2, and a heat drawing mechanism, a speed change mechanism, a stirring mechanism and a screening mechanism are respectively arranged on the upper surface of the installation frame 1 from top to bottom.

Wherein, the heat draws the mechanism and is used for drawing into stoving case 3 with the heat that heating apparatus produced in, realizes hot-blast action of drying to the rice that is located stoving case 3.

Wherein, rabbling mechanism is used for carrying out stirring motion to the rice that is located stoving case 3 to realize that the rice is heated even action.

Wherein, screening mechanism is used for realizing the action of vibrating screening to the rice after drying.

Further, in order to realize heat transfer into the drying box 3 and to dry the rice by hot air, the heat drawing mechanism includes a heat source box 4 installed on the right side surface of the upper end of the supporting block 2, in order to prevent heat loss from the heat source box 4, the heat source box 4 is made of a heat-insulating material, such as plastic, foam, metal, and in addition, in order to make the heat source box 4 have better heat-insulating effect, an aerogel felt can be wrapped on the surface of the heat source box 4, an air supply pipe 41 with one end communicated with the heating device is fixedly communicated with the outer surface of the heat source box 4, the heat generated by the operation of the heating device is conveyed into the heat source box 4 through the air supply pipe 41, a rotating rod 42 with one end extending to the lower surface of the heat source box 4 is installed at the center of the inner bottom wall of the heat source box 4 through a bearing, a dark channel for guiding the rotating rod in the heat flow direction is opened at the center of the inner bottom wall of the rotating rod 42, drawing holes 43 distributed in an annular array are opened on the outer surface of the heat source box 4, the rotating rod 43 is communicated with the dark channel of the rotating rod 42, and the dark channel for drawing the heat from the inner bottom end of the drying box 4, and the drying box 3, and the heat can be drawn from the dark channel for drawing the rice.

Further, in order to draw the dark lane to dwang 42 to the heat in the heat source case 4 in the realization, the surface mounting that the dwang 42 is located the heat source case 4 has cup jointed and has drawn flabellum 44, through providing the power supply to dwang 42, thereby the flabellum 44 that draws on drive dwang 42 and dwang 42 surface rotates, the drive draws the flabellum 44 and rotates the back and produces suction, realize the action of drawing to the heat that is located the heat source case 4, thereby draw the dark lane to dwang 42 in through drawing hole 43 with the heat that is located the heat source case 4.

Further, in order to prevent the heat from drawing the mechanism, the speed change mechanism and the stirring mechanism and interfering in the working process, the speed change mechanism comprises a synchronous belt 5, a speed change cylinder 51 and meshing teeth 52, after the meshing of the meshing teeth 52 and the synchronous belt 5 is realized by the telescopic driving of the speed change cylinder 51, the synchronous belt 5 is driven to move along the length direction of the mounting frame 1, and the speed change of the moving speed of the synchronous belt 5 is realized by the one-time telescopic action of the speed change cylinder 51.

The outer surface of the drying box 3 is fixedly sleeved with a driving motor 53, the heat drawing mechanism, the speed change mechanism and the stirring mechanism are driven by one power source, energy consumption is saved, manufacturing cost is reduced, the failure probability of the power source is reduced, meanwhile, the combination degree of the three mechanisms is enabled, the structure is compact, a transmission shaft 54 is fixedly installed on an output shaft of the driving motor 53 through a coupler, the outer surfaces of the transmission shaft 54 and the rotating rod 42 are fixedly sleeved with an octagonal-shaped rotating disc 55, the driving motor 53 converts electric energy into mechanical energy, and the driving transmission shaft 54 and the rotating disc 55 connected to one end of the transmission shaft 54 realize rotating motion.

Further, in order to realize the online stepless speed change of the moving speed of the synchronous belt 5, the speed changing cylinder 51 is fixedly installed in the radial direction of the rotating disc 55, the meshing teeth 52 are fixedly installed on the outer end of the piston rod of the speed changing cylinder 51 to realize radial expansion, when the moving speed of the synchronous belt 5 needs to be adjusted, the online stepless speed change of the moving speed of the synchronous belt 5 is realized through the expansion and contraction actions of the speed changing cylinder 51, and the inner top wall of the drying box 3 is communicated with a humidity exhaust pipe with a one-way valve.

Further, in order to realize drying the rice better in the drying box 3, the last fixed surface of supporting shoe 2 installs the former storage bucket 56 that communicates with drying box 3 through the conveying pipeline, pour the rice that needs to be dried into former storage bucket 56 earlier, secondly carry the rice to drying box 3 through the conveying pipeline in, finally, draw the action that the mechanism realized hot-blast drying to the rice that is located drying box 3 through the heat, drive the rice and be in the mobile state all the time in drying box 3 through rabbling mechanism, make the rice be heated more evenly, and then have drying efficiency height, the advantage that drying effect is good, rabbling mechanism is including installing seven groups of stirring paddle leaf 6 that just are linear array distribution on dwang 42 surface, wherein equal fixedly connected with is used for realizing scraping off the scraper blade 61 of action to drying box 3 inner wall between five adjacent stirring paddle leaf 6 of group, stirring paddle leaf 6 and scraper blade 61 cooperate and use, because of rice is stained with water, make stirring paddle leaf 6 in the course of working to the rice stirring, the rice adheres to drying box 3 inner wall easily, therefore, scraper blade 61 that the condition that can effectively avoid rice 3 inner wall to take place the adhesion through the drying box 3 inner wall and realize the meshing of the stirring paddle leaf drive, and realize the stirring disc drive motor 52 and drive the action behind the dwang 5, and realize the stirring blade 5 and drive the synchronous belt motion.

Further, in order to realize realizing automatic discharge to the rice in stoving case 3, the outer fixed surface of stoving case 3 installs striker cylinder 62, striker cylinder 62's piston rod outer end fixedly connected with telescopic link 63, the one end fixedly connected with of telescopic link 63 and stoving case 3's striker plate 64 of striker groove inner wall sliding connection, in order to reduce staff's intensity of labour, alleviate staff's work load, through striker cylinder 62, telescopic link 63 and striker plate 64's cooperation is used, to the action of drying the rice automatic discharge after accomplishing, in addition, in order to unload to the rice better, avoid striker plate 64 in the motion process, cause long-pending damage to the rice, striker cylinder 62, telescopic link 63 and striker plate 64 still can slope the setting at the surface of stoving case 3, striker plate 64 that striker cylinder 62 flexible drive telescopic link 63 and telescopic link 63 one end are connected moves along the length direction of striker cylinder 62, and stretch one and contract the action through striker cylinder 62 and realize the action of realizing the action of unloading to the rice after drying case 3 internal drying through the temperature sensor 65, prevent the action of drying case 3 internal connection of being heated temperature sensor 65, the internal temperature sensor 65 that is connected to the rice.

Through setting up heat and drawing mechanism, speed change mechanism, rabbling mechanism, adopt by a power supply drive, not only energy-conserving energy consumption, reduced manufacturing cost, still reduced the fault probability of power supply, make three mechanism's combination degree simultaneously, compact structure.

Further, in order to realize the purpose of screening and classifying materials, a discharge port of the drying box 3 is provided with a discharge cloth bag 66, the screening mechanism comprises damping springs 7 which are uniformly distributed and mounted on the upper surface of the mounting frame 1, one end of each damping spring 7 is fixedly connected with a screening box 71 which prevents vibration from being transmitted to the ground, and simultaneously supports the whole weight of the screening box 71, when the screening mechanism is mounted, each damping spring 7 must be perpendicular to the ground, the inner wall of the screening box 71 is provided with a screening plate 72 through bolts, the outer surface of the screening plate 72 is respectively provided with fine screening holes 73 and coarse screening holes 74 which are distributed in a linear array, the hole diameters of the fine screening holes 73 are smaller than the hole diameters of the coarse screening holes 74, the screening mechanism is driven by a double-vibration motor 75, when the two vibration motors 75 synchronously and reversely rotate, the vibration forces generated by eccentric blocks of the two vibration motors are mutually counteracted in a direction parallel to the motor axis, and are overlapped into a combined force in a direction perpendicular to the motor axis, so that the motion track of the screening machine is a straight line, two opposite vibration plates 72 have an inclination angle, and the action of the vibration force and the self-gravity of the materials can play a role of a combined force of throwing on the motor shaft to screen the materials, thereby realizing the purpose of forward screening and classifying the materials.

Furthermore, in order to provide a power source for the screening mechanism, the lower surface of the discharging cloth bag 66 is connected with the upper surface of the screening box 71, the vibrating motors 75 which are symmetrically distributed are fixedly installed on the lower surface of the screening box 71, the vibration of the vibrating motors 75 is used as a vibration source, so that materials are thrown up on the screening plate 72 and move forwards in a straight line, the materials uniformly enter the feeding hole of the screening box 71 from the discharging cloth bag 66 below the dryer, screen oversize products and screen undersize products of various specifications are generated through the fine screening holes 73 and the coarse screening holes 74 which are formed in the surface of the screening plate 72, and are respectively discharged from respective outlets, the automatic rice sowing machine has the advantages of low energy consumption, high yield, simple structure, easiness in maintenance and full-closed structure, no dust scattering, is more suitable for assembly line operation, a first discharging port 76 for realizing the discharging action of rice falling from the fine screening holes 73 and a second discharging port 77 for realizing the discharging action of the rice falling from the coarse screening holes 74 are respectively formed in the inner bottom wall of the screening box 71 from left to right, and the front surface of the supporting block 2 is fixedly provided with a mechanism for controlling the heat drawing mechanism, a variable speed stirring mechanism and a screening mechanism 78 for controlling the operation.

By arranging the screening mechanism, the vibration of the vibration motor 75 is used as a vibration source, so that the materials are thrown up on the screening plate 72 and simultaneously move forwards in a linear manner, after the materials uniformly enter a feed inlet of the screening box 71 from a discharge cloth bag 66 below the dryer, oversize products and undersize products with various specifications are generated through fine screening holes 73 and coarse screening holes 74 formed in the surface of the screening plate 72 and are discharged from respective outlets, and the purposes of screening and grading the materials are further achieved.

Example two

Referring to fig. 1-6, a drying method of a portable hot air drying system for rice processing comprises the following steps that firstly, rice to be dried is poured into a raw material barrel 56 and then is conveyed into a drying box 3 through a conveying pipe;

secondly, the controller 78 controls the heating equipment and the driving motor 53 to be started, and heat generated by the operation of the heating equipment is conveyed into the heat source box 4 through the air supply pipe 41, so that the rice is conveniently dried in the subsequent process;

the rolling disc 55 that driving motor 53 drive transmission shaft 54 and transmission shaft 54 one end are connected rotates, through the meshing of meshing tooth 52 and hold-in range 5, and then drives the multiunit stirring paddle leaf 6 of dwang 42, dwang 42 surface connection and draws flabellum 44 and realize rotary motion, is in its concrete motion process:

the drawing fan blades 44 generate suction force after rotating, and draw the heat in the heat source box 4, so that the heat in the heat source box 4 is drawn into the dark channel of the rotating rod 42 through the drawing holes 43 and flows out from the bottom end of the dark channel of the rotating rod 42, and then the rice in the drying box 3 is dried by hot air from bottom to top;

after the stirring paddle 6 rotates, stirring action is carried out on the rice in the drying box 3, the rice is driven to be in a flowing state in the drying box 3 all the time, the rice is heated more uniformly, and the scraper 61 is driven to scrape the rice adhered to the inner wall of the drying box 3 while the stirring paddle 6 rotates;

when the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism need to be adjusted, the moving speed of the synchronous belt 5 is changed through one stretching and one shrinking action of the speed changing cylinder 51, and further the online stepless speed change is realized on the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism;

after the rice is dried by hot air, the material blocking cylinder 62 stretches and retracts to drive the telescopic rod 63 and the material blocking plate 64 connected with one end of the telescopic rod 63 to move along the length direction of the material blocking cylinder 62, and the automatic discharging action of the dried rice in the drying box 3 is realized through the stretching and retracting actions of the material blocking cylinder 62;

step five, using vibration of a vibration motor 75 as a vibration source to throw up the materials on the screening plate 72 and make the materials move forwards in a straight line, after the materials uniformly enter a feed inlet of the screening box 71 from a discharge cloth bag 66 below the dryer, oversize products and undersize products with various specifications are generated through fine screening holes 73 and coarse screening holes 74 formed in the surface of the screening plate 72 and are discharged from respective outlets, and the purpose of screening and grading the materials is achieved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a rice processing is with portable hot-blast drying system, is including installing subaerial mounting bracket (1) and being located supporting shoe (2) in mounting bracket (1) outside, its characterized in that: the upper surface of the supporting block (2) is fixedly sleeved with a drying box (3), and the upper surface of the mounting rack (1) is provided with a heat drawing mechanism, a speed change mechanism, a stirring mechanism and a screening mechanism from top to bottom respectively;

the heat drawing mechanism is used for drawing heat generated by heating equipment into the drying box (3) and realizing hot air drying action on the rice in the drying box (3);

the stirring mechanism is used for stirring the rice in the drying box (3) so as to realize the action of uniformly heating the rice;

the speed change mechanism is used for realizing online stepless speed change action on the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism;

2. The portable hot air drying system for rice processing according to claim 1, characterized in that: the heat draws the mechanism including installing heat source case (4) of supporting shoe (2) upper end right flank surface, the external fixed surface intercommunication of heat source case (4) has blast pipe (41) of one end and heating equipment intercommunication, interior diapire center department of heat source case (4) installs dwang (42) that one end extends to heat source case (4) lower surface through the bearing, the surface that dwang (42) are located heat source case (4) is seted up and is the hole (43) of drawing that the annular array distributes.

3. The portable hot air drying system for rice processing according to claim 2, characterized in that: dwang (42) are located the fixed surface of heat source case (4) and have cup jointed and draw flabellum (44), drive draw flabellum (44) and produce suction after rotating, to being located heat in heat source case (4) realizes the action of drawing, thereby will be located heat in heat source case (4) is drawn extremely through drawing hole (43) in the dark lane of dwang (42).

4. The portable hot air drying system for rice processing as claimed in claim 3, wherein: the speed change mechanism comprises a synchronous belt (5), a speed change cylinder (51) and meshing teeth (52), after the speed change cylinder (51) telescopically drives the meshing teeth (52) to be meshed with the synchronous belt (5), the synchronous belt (5) is driven to move along the length direction of the mounting rack (1), and the speed change of the moving speed of the synchronous belt (5) is realized through the telescopic action and the telescopic action of the speed change cylinder (51);

the outer fixed surface of stoving case (3) has cup jointed driving motor (53), the output shaft of driving motor (53) has transmission shaft (54) through shaft coupling fixed mounting, the outer fixed rolling disc (55) that are the octagon shape that has cup jointed all of transmission shaft (54) and dwang (42).

5. The portable hot air drying system for rice processing according to claim 4, characterized in that: the variable-speed air cylinder (51) is fixedly installed on the radial direction of the rotating disc (55), the meshing teeth (52) are fixedly installed on the outer end of a piston rod of the variable-speed air cylinder (51) to achieve radial expansion, and the inner top wall of the drying box (3) is communicated with a moisture exhaust pipe with a one-way valve.

6. The portable hot air drying system for rice processing according to claim 4, characterized in that: last fixed surface of supporting shoe (2) installs former storage bucket (56) through conveying pipeline and stoving case (3) intercommunication, rabbling mechanism is including installing seven groups stirring paddle leaf (6) that dwang (42) surface just is linear array and distributes, and wherein five groups are adjacent equal fixedly connected with is used for realizing scraping scraper blade (61) of action to stoving case (3) inner wall between stirring paddle leaf (6), driving motor (53) drive hold-in range (5) motion back through meshing tooth (52), drive dwang (42) and dwang (42) surface connection's rolling disc (55) and stirring paddle leaf (6) realize rotary motion, and then realize the stirring action to the rice that is located stoving case (3).

7. The portable hot air drying system for rice processing according to claim 6, characterized in that: the utility model discloses a rice drying device, including stoving case (3), the outer fixed surface of stoving case (3) installs striker cylinder (62), the piston rod outer end fixedly connected with telescopic link (63) of striker cylinder (62), the one end fixedly connected with of telescopic link (63) with striker plate (64) of the striker groove inner wall sliding connection of stoving case (3), striker plate (64) that striker cylinder (62) flexible drive telescopic link (63) and telescopic link (63) one end are connected moves on the length direction of striker cylinder (62) to through striker cylinder (62) one stretch one contract the action realize the action of unloading to the rice after stoving case (3) interior stoving, the outer fixed surface of stoving case (3) installs temperature sensor (65), temperature sensor (65) and striker cylinder (62) electric connection.

8. The portable hot air drying system for rice processing according to claim 7, characterized in that: the cloth bag (66) of unloading is installed to the discharge gate of stoving case (3), screening mechanism is including installing damping spring (7) at mounting bracket (1) upper surface and being evenly distributed, the one end fixedly connected with screening case (71) of damping spring (7), screening board (72) is installed through the bolt to the inner wall of screening case (71), fine screening hole (73) and coarse screening hole (74) that are linear array and distribute are seted up respectively to the surface of screening board (72), the hole diameter of fine screening hole (73) is less than the hole diameter of coarse screening hole (74).

9. The portable hot air drying system for rice processing according to claim 8, characterized in that: the lower surface of unloading sack (66) and the upper surface connection of screening case (71), the lower fixed surface of screening case (71) installs vibrating motor (75) that is symmetric distribution, the interior diapire of screening case (71) is seted up respectively from left to right and is realized unloading first discharge opening (76) of action and second discharge opening (77) of action to realizing unloading by the rice that fine screening hole (73) dropped by coarse screening hole (74) to the rice that drops by fine screening hole, the positive fixed mounting of supporting shoe (2) has controller (78) that are used for controlling heat to draw mechanism, speed change mechanism, rabbling mechanism and screening mechanism operation.

10. The drying method of the portable hot air drying system for rice processing according to any one of claims 1 to 9, wherein the drying method comprises the following steps: firstly, pouring rice to be dried into a raw material barrel (56), and conveying the rice into a drying box (3) through a conveying pipe;

secondly, the controller (78) controls the heating equipment and the driving motor (53) to be started, heat generated by the operation of the heating equipment is conveyed into the heat source box (4) through the air supply pipe (41), and then the rice is dried conveniently in the following process;

the rolling disc (55) that driving motor (53) drive transmission shaft (54) and transmission shaft (54) one end are connected rotates, through the meshing of meshing tooth (52) and hold-in range (5), and then drives dwang (42), the multiunit stirring paddle leaf (6) of dwang (42) surface connection and draws flabellum (44) and realize rotary motion, and its concrete motion in-process is:

the drawing fan blade (44) generates suction force after rotating, and draws heat in the heat source box (4), so that the heat in the heat source box (4) is drawn into a dark channel of the rotating rod (42) through the drawing hole (43) and flows out of the bottom end of the dark channel of the rotating rod (42), and then hot air drying from bottom to top is realized on rice in the drying box (3);

after the stirring paddle (6) rotates, stirring action is carried out on the rice in the drying box (3), the rice is driven to be in a flowing state in the drying box (3) all the time, the rice is heated more uniformly, and the scraping plate (61) is driven to scrape the rice adhered to the inner wall of the drying box (3) while the stirring paddle (6) rotates;

when the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism need to be adjusted, the moving speed of the synchronous belt (5) is changed through the stretching and shrinking actions of the speed changing cylinder (51), and further the drawing speed of the heat drawing mechanism and the stirring rotating speed of the stirring mechanism are changed in an online stepless speed changing manner;

after the rice is dried by hot air, the baffle cylinder (62) stretches and retracts to drive the telescopic rod (63) and the baffle plate (64) connected with one end of the telescopic rod (63) to move along the length direction of the baffle cylinder (62), and the rice dried in the drying box (3) is automatically unloaded by stretching and retracting actions of the baffle cylinder (62);

and fifthly, using vibration of a vibration motor (75) as a vibration source to throw up the materials on a screening plate (72) and simultaneously move forwards in a linear manner, enabling the materials to uniformly enter a feed inlet of a screening box (71) from a discharge cloth bag (66) below the dryer, generating oversize products and undersize products with various specifications through fine screening holes (73) and coarse screening holes (74) formed in the surface of the screening plate (72), and then respectively discharging the oversize products and the undersize products from respective outlets, thereby achieving the purpose of screening and grading the materials.