CN116428850A - Circulating hot air drying system for feed production - Google Patents

Circulating hot air drying system for feed production Download PDF

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Publication number
CN116428850A
CN116428850A CN202310403230.1A CN202310403230A CN116428850A CN 116428850 A CN116428850 A CN 116428850A CN 202310403230 A CN202310403230 A CN 202310403230A CN 116428850 A CN116428850 A CN 116428850A
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China
Prior art keywords
cover
pipe
channel
feed
hot air
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Granted
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CN202310403230.1A
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Chinese (zh)
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CN116428850B (en
Inventor
方照
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Anhui Dongsheng Agriculture And Animal Husbandry Technology Co
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Anhui Dongsheng Agriculture And Animal Husbandry Technology Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02—Applications of driving mechanisms, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The application relates to the technical field of air drying equipment, in particular to a circulating hot air drying system for feed production, which comprises an inner pipe, an inner cover and an outer cover which are coaxially arranged from inside to outside in sequence, wherein the inner part of the inner pipe is hollow and forms an inner hot air channel, and an air outlet pipe is arranged on the inner pipe; the inner cover is sleeved on the inner pipe, an inner material channel is formed by the inner wall of the inner cover and the outer side wall of the inner pipe in a surrounding mode, an outer hot air channel is formed by the inner wall of the inner cover and the outer wall of the inner cover in a hollow mode, and a feed pipe and an air inlet pipe are arranged on the inner cover; the outer cover is sleeved on the inner cover, an outer material channel is formed by the inner wall of the outer cover and the outer side wall of the inner cover in a surrounding mode, a discharging pipe is arranged on the outer cover, and the outer material channel is communicated with the inner material channel; an inner spiral blade is rotationally embedded in the inner material channel, and an outer spiral blade is rotationally embedded in the outer material channel; an external drive mechanism is also included. The utility model provides a relatively poor problem of fodder air-drying effect can be improved.

Description

Circulating hot air drying system for feed production
Technical Field
The application relates to the technical field of air drying equipment, in particular to a circulating hot air drying system for feed production.
Background
Air drying is an indispensable procedure in the production process of feeds, and various traditional air drying modes are available, such as natural air drying, hot air drying and the like.
Through retrieval, chinese patent publication No. CN210486434U discloses a feed drying device, which comprises a shell, wherein a first supporting plate which extends obliquely downwards is arranged in the shell, one end of the first supporting plate is connected to the inner side wall of the shell, a second supporting plate is arranged below the first supporting plate, one end of the second supporting plate is connected to the inner side wall of the shell, a third supporting plate is connected between the other end of the first supporting plate and the other end of the second supporting plate, the front side surface and the rear side surface of the first supporting plate, the second supporting plate and the third supporting plate are all in sealing connection with the inner wall of the shell, a drying assembly is arranged on the upper end surface of the first supporting plate, and a feed inlet is arranged at the top of the shell; the utility model has simple structure and convenient use, can effectively dry the feed, ensures the quality of the feed and meets the demands of people.
With respect to the related art in the above, the inventors consider that there are the following drawbacks: although the prior art prolongs the movement path of the feed through the arrangement of the rotating roller, the baffle plate and the helical blade, so that the feed can be dispersed as far as possible, the damp-removed hot air can only contact with the feed at one end of the helical blade, the drying time is shorter, and the ideal air drying effect is not achieved; even though the dehumidified hot air can fill the whole shell, the hot air still has difficulty in uniformly air-drying the feed well because the feed is easily piled up during the transportation process and has a certain thickness, and thus improvement is needed.
Disclosure of Invention
In order to improve the relatively poor problem of fodder air-drying effect, this application provides a circulation hot air drying system for feed production.
The application provides a feed production is with circulation hot-blast air-drying system adopts following technical scheme: the circulating hot air drying system for feed production comprises an inner pipe, an inner cover and an outer cover which are coaxially arranged in sequence from inside to outside, wherein the inner pipe and the inner cover are made of heat conducting materials, the outer cover is made of heat insulating materials, the inner part of the inner pipe is hollow and forms an inner hot air channel, and an air outlet pipe communicated with the inner hot air channel is arranged on the inner pipe;
the inner cover is sleeved on the inner pipe, an inner material channel is formed by surrounding the inner wall of the inner cover and the outer side wall of the inner pipe together, an outer hot gas channel is formed by being arranged between the inner wall of the inner cover and the outer wall of the inner cover in a hollow mode, a feeding pipe communicated with the inner material channel and an air inlet pipe communicated with the outer hot gas channel are arranged on the inner cover, and one end of the outer hot gas channel, far away from the air inlet pipe, is communicated with one end of the inner hot gas channel, far away from the air outlet pipe, through a connecting pipe;
the outer cover is sleeved on the inner cover, an outer material channel is formed by the inner wall of the outer cover and the outer side wall of the inner cover in a surrounding mode, a discharging pipe communicated with the outer material channel is arranged on the outer cover, and one end, far away from the discharging pipe, of the outer material channel is communicated with one end, far away from the feeding pipe, of the inner material channel through a connecting channel;
the inner material channel is internally and rotationally embedded with an inner spiral blade for pushing feed from the feed pipe to the connecting channel, the outer material channel is internally and rotationally embedded with an outer spiral blade for pushing feed from the connecting channel to the discharge pipe, and the feed amount of the outer spiral blade in unit time is not less than the feed amount of the inner spiral blade in unit time;
the device also comprises an inner driving mechanism for driving the inner spiral blade to rotate and an outer driving mechanism for driving the outer spiral blade to rotate.
Optionally, the communicating part of the feeding pipe and the inner material channel is positioned between the end face of one end of the inner spiral blade far away from the connecting channel and the middle part of the inner spiral blade.
Optionally, the connection channel is located between the outer spiral blade and the middle part of outer spiral blade in the terminal surface of one end that the discharging pipe was kept away from to the junction of outer material passageway.
Optionally, an inner rotating ring groove communicated with the inner material channel is formed in one end face of the inner cover, the inner driving mechanism comprises an inner ring rotationally embedded in the inner rotating ring groove, the inner ring is coaxially connected with the inner spiral blade, and the inner ring is coaxially connected with an outer ring gear; the motor is installed on the inner cover, and a first gear is coaxially connected to an output shaft of the motor and meshed with the outer gear.
Optionally, an outer rotary ring groove communicated with the outer material channel is arranged on one end face of the outer cover, the outer driving mechanism comprises an outer ring rotationally embedded in the outer rotary ring groove, the outer ring is coaxially connected with the outer spiral blade, an inner gear ring is coaxially connected to the outer ring, a second gear is coaxially connected to an output shaft of the motor, and the second gear is meshed with the inner gear ring.
Optionally, the inner spiral blade and the outer spiral blade are both uniformly provided with a material supporting plate, and the material supporting plate pushes the feed to rise spirally when turning upwards.
Optionally, the inlet pipe is the slope setting and is provided with two in the left and right sides symmetry of inner tube, and the inner cover is worn to locate by the low end of inlet pipe and communicate in interior material passageway, and the high end intercommunication of two inlet pipes has same feeder hopper, and the feeder hopper is located the outside of dustcoat, and the inside of feeder hopper and the inside of two inlet pipes have enclosed jointly and have been the branch material chamber that is the setting of "Y" shape.
Optionally, the inner tube and the inner cover are made of a heat conductive material, and the outer cover is made of a heat insulating material.
In summary, the present application includes the following beneficial technical effects:
1. the feed in the feed pipe passes through the inner material channel, the connecting channel and the outer material channel and is discharged through the discharge pipe, and hot air in the air inlet pipe passes through the outer hot air channel, the connecting pipe and the inner hot air channel and is discharged through the air outlet pipe, so that the hot air indirectly air-dries the feed through the inner pipe and the inner cover, the indirect contact time of the hot air and the feed is prolonged, and the air drying effect of the feed is improved;
2. the fodder is spirally distributed in the conveying process, the thickness of the spirally distributed fodder is thinner, the heated area of the fodder is increased, and hot air can be indirectly and fully contacted with the fodder, so that the air drying effect of the fodder is further improved;
3. when the motor drives the first gear and the second gear to rotate, the first gear drives the outer gear ring to rotate, and the outer gear ring drives the inner spiral blade to rotate through the inner ring, so that the inner spiral blade can rotationally push and disperse feed in the inner material channel; the second gear will drive the annular gear to rotate, and the annular gear will drive the outer spiral blade to rotate through the outer ring for the outer spiral blade can rotate to promote and disperse the fodder in the outer material passageway, has realized the transportation and the dispersion of fodder in inner material passageway and outer material passageway.
Drawings
FIG. 1 is a schematic view of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic overall cross-sectional view of an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of the inner tube, inner cap and feed tube of an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of the inner tube, inner cover and outer cover of an embodiment of the present application;
FIG. 5 is a schematic view of the structure of the right ends of the inner tube, inner cover and outer cover in an embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of the right ends of the inner tube, inner cover and outer cover in an embodiment of the present application.
Reference numerals: 1. an inner tube; 11. an internal hot air passage; 12. an air outlet pipe; 2. an inner cover; 21. an inner material passage; 22. an outer hot gas path; 23. a feed pipe; 24. a connecting pipe; 25. inner spiral leaves; 26. a material supporting plate; 27. a feed hopper; 28. a material distribution cavity; 29. an inner rotary ring groove; 3. an outer cover; 31. a support leg; 32. an air inlet pipe; 33. an outer material passage; 34. a discharge pipe; 35. a connection channel; 36. an outer helical leaf; 37. an outer rotary ring groove; 4. an inner drive mechanism; 41. an inner ring; 42. an outer ring gear; 43. an inner rotating bearing; 44. a motor; 45. a gear; 5. an outer drive mechanism; 51. an outer ring; 52. an inner gear ring; 53. and an outer rotating bearing.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses a circulating hot air drying system for feed production. As shown in FIG. 1, a circulating hot air drying system for feed production comprises an inner pipe 1, an inner cover 2 and an outer cover 3 which are coaxially arranged from inside to outside in sequence, wherein the inner pipe 1, the inner cover 2 and the outer cover 3 are all arranged horizontally, the inner pipe 1 and the inner cover 2 are made of heat conducting materials, the outer cover 3 is made of heat insulating materials, the inner cover 2 is fixedly sleeved on the inner pipe 1, the outer cover 3 is fixedly sleeved on the inner cover 2, and a plurality of supporting legs 31 are installed at the bottom of the outer cover 3.
As shown in fig. 2, the inner tube 1 is hollow and forms an internal hot air channel 11, and the left end of the inner tube 1 is provided with an air outlet tube 12 communicated with the internal hot air channel 11; the inner wall of the inner cover 2 and the outer side wall of the inner pipe 1 enclose an inner material channel 21 together, an outer hot gas channel 22 is formed by being arranged in a hollow mode between the inner wall of the inner cover 2 and the outer wall of the inner cover 2, a feeding pipe 23 communicated with the inner material channel 21 is arranged on the left end side wall of the inner cover 2, an air inlet pipe 32 communicated with the outer hot gas channel 22 is arranged on the left end face of the outer cover 3, and the right end of the outer hot gas channel 22 is communicated with the right end of the inner hot gas channel 11 through a connecting pipe 24.
The inner wall of the outer cover 3 and the outer side wall of the inner cover 2 enclose an outer material channel 33 together, a discharging pipe 34 communicated with the outer material channel 33 is arranged on the bottom side wall of the left end of the outer cover 3, the right end side part of the outer material channel 33 is communicated with the right end side part of the inner material channel 21 through a connecting channel 35, and the connecting channel 35 penetrates through the outer hot air channel 22.
The inner material channel 21 is internally and rotatably embedded with an inner spiral blade 25, the outer material channel 33 is internally and rotatably embedded with an outer spiral blade 36, and both the inner spiral blade 25 and the outer spiral blade 36 are made of heat conducting materials; also included are an inner drive mechanism 4 for driving the inner screw lobes 25 in rotation and an outer drive mechanism 5 for driving the outer screw lobes 36 in rotation.
When feed enters the inner material passage 21 through the feed inlet, the inner driving mechanism 4 will drive the inner screw 25 to rotate, and the inner screw 25 will push feed from the feed pipe 23 to the connecting passage 35 during rotation, i.e. feed will move from the left end of the inner material passage 21 to the right end of the inner material passage 21.
The feed will then pass through the connecting channel 35 and into the outer feed channel 33, the outer drive mechanism 5 will drive the outer screw blade 36 to rotate, the outer screw blade 36 will push the feed from the connecting channel 35 towards the discharge pipe 34 during rotation, i.e. the feed will move from the right end of the outer feed channel 33 to the left end of the outer feed channel 33, and eventually the feed will be discharged from the discharge pipe 34.
It should be noted that the pitch of the outer spiral blade 36 is smaller than that of the inner spiral blade 25, and the amount of feed delivered by the outer spiral blade 36 per unit time is not smaller than that of the inner spiral blade 25 per unit time, so that feed entering the outer material channel 33 from the inner material channel 21 is not easy to be blocked.
After the feed enters the inner material channel 21, hot air enters the outer hot air channel 22 through the air inlet pipe 32 and moves from left to right, then the hot air enters the inner hot air channel 11 through the connecting pipe 24 and moves from right to left, finally the hot air is discharged from the air outlet pipe 12, and the discharged hot air can be continuously recycled in the air inlet pipe 32 after being heated.
In the process that the feed is spirally conveyed by the inner spiral blades 25 and the outer spiral blades 36, the feed in the inner material channel 21 is dispersed and clung to the outer side wall of the inner pipe 1 and the inner side wall of the inner cover 2, the hot air in the inner hot air channel 11 dries and heats the feed in the inner material channel 21 through the side wall of the inner pipe 1, and the hot air in the outer hot air channel 22 dries and heats the feed in the inner material channel 21 through the inner side wall of the inner cover 2; the fodder in the outer material passage 33 will be dispersed and cling to the outer side wall of the inner cover 2 and the inner side wall of the outer cover 3, and the hot air in the outer hot air passage 22 will dry and heat the fodder in the outer material passage 33 through the outer side wall of the inner cover 2. The hot air can fully contact with the scattered feed through the heat-conducting object, so that the air drying effect on the feed is improved, and the moisture in the hot air is prevented from contacting with the feed to make the feed wet.
It is worth to say that the direction of feed delivery is opposite with the flow direction of steam for the lower steam of temperature can air-dry just entering the fodder, and the higher steam of temperature can air-dry the fodder that will discharge, makes the fodder gradually intensify in the transportation process, and make full use of the heat in the steam.
Compared with the prior art, the inner tube 1, the inner cover 2 and the outer cover 3 are coaxially arranged, every two adjacent parts are mutually sleeved, the space is saved, and the whole volume of the equipment is reduced; the method prolongs the movement path of the feed in a limited space, namely increases the contact time of hot air passing through the heat conducting object and the feed, thereby improving the air drying effect of the feed; in addition, the steam in this application can be through the fodder that inner tube 1, inner cover 2, inner spiral leaf 25 and outer spiral leaf 36 indirect contact heliciform were arranged, and the thickness of the fodder that the heliciform was arranged is thinner, has increased the heated area of fodder for steam can be indirect fully with fodder contact, and the heat insulation of outer cover 3 makes outside air be difficult for carrying out heat transfer with steam, thereby has further improved the air-drying effect of fodder.
The material supporting plates 26 are uniformly welded on the inner spiral blade 25 and the outer spiral blade 36, and when the inner spiral blade 25 and the outer spiral blade 36 rotate to push feed to move, the material supporting plates 26 push the feed to rise in a spiral mode in the upward overturning process, so that the feed can be distributed into a spiral shape, the feed is fully attached to the inner tube 1 and the inner cover 2, and the air drying effect of the feed is guaranteed.
It is worth noting that the communication position between the feeding pipe 23 and the inner material channel 21 is located between the left end of the inner spiral blade 25 and the middle of the inner spiral blade 25, so that the feed entering the inner material channel 21 from the feeding pipe 23 is prevented from accumulating at the left end of the inner material channel 21, and normal feed is ensured.
The communication position of the connecting channel 35 and the outer material channel 33 is positioned between the right end of the outer spiral blade 36 and the middle part of the outer spiral blade 36, so that the feed entering the outer material channel 33 from the connecting channel 35 is prevented from being accumulated at the right end of the outer material channel 33, and the normal conveying of the feed is ensured.
As shown in fig. 2 and fig. 4, the left ends of the inner tube 1 and the inner cover 2 protrude to the outer side of the outer cover 3, the feeding tubes 23 are obliquely arranged and are symmetrically arranged at the left side and the right side of the inner tube 1, the lower ends of the feeding tubes 23 penetrate through the inner cover 2 and are communicated with the inner material channel 21, the high ends of the two feeding tubes 23 are communicated with the same feeding hopper 27, the feeding hopper 27 is positioned at the outer side of the outer cover 3, and a material distributing cavity 28 which is arranged in an inverted Y shape is formed by the inside of the feeding hopper 27 and the inside of the two feeding tubes 23.
After the feed enters the feed distribution cavity 28, the feed is dispersed into two parts by the joint of the two feed pipes 23, the two parts of feed enter the two feed pipes 23 respectively, and the feed in the two feed pipes 23 enter the inner material channel 21 respectively from the left side and the right side of the inner pipe 1 so that the material is further dispersed in the inner material channel 21.
As shown in fig. 5 and 6, an inner rotating ring groove 29 communicated with the inner material channel 21 is arranged on the right end surface of the inner cover 2, the inner driving mechanism 4 comprises an inner ring 41 rotationally embedded in the inner rotating ring groove 29, the inner ring 41 is coaxially connected with the inner spiral blade 25, and an outer gear ring 42 is coaxially connected with the inner ring 41; an inner rotary bearing 43 is arranged at the right end of the inner tube 1, an inner ring of the inner rotary bearing 43 is fixed on the inner tube 1, and an outer ring gear 42 is fixedly sleeved on an outer ring of the inner rotary bearing 43, so that the outer ring gear 42, the inner ring 41 and the inner spiral blades 25 can only rotate around the axis of the inner ring gear.
The motor 44 is mounted on the inner cover 2, a first gear 45 is coaxially connected to the output shaft of the motor 44, and the first gear 45 is meshed with the outer gear 42. The motor 44 can drive the outer gear ring 42 to rotate through the first gear 45, and the outer gear ring 42 can drive the inner spiral blade 25 to rotate through the inner ring 41, so that the inner spiral blade 25 can rotationally push and disperse the feed in the inner material channel 21.
The right end face of the outer cover 3 is provided with an outer rotating ring groove 37 communicated with the outer material channel 33, the outer driving mechanism 5 comprises an outer ring 51 rotationally embedded in the outer rotating ring groove 37, the outer ring 51 is coaxially connected with the outer spiral blade 36, and the outer ring 51 is coaxially connected with an inner gear ring 52; an outer rotating bearing 53 is arranged at the right end of the outer cover 3, an outer ring of the outer rotating bearing 53 is fixed on the outer cover 3, and an inner gear ring 52 is fixedly embedded in an inner ring of the outer rotating bearing 53, so that the inner gear ring 52, the outer ring 51 and the outer spiral blades 36 can only rotate around the axis of the outer spiral blades.
The output shaft of the motor 44 is coaxially connected with a second gear 45, and the second gear 45 is meshed with the annular gear 52. The motor 44 can drive the inner gear ring 52 to rotate through the second gear 45, and the inner gear ring 52 drives the outer spiral blades 36 to rotate through the outer ring 51, so that the outer spiral blades 36 can rotationally push and disperse the feed in the outer material channel 33; i.e. by activating the motor 44, the feed is transported and dispersed in the inner 21 and outer 33 material channels.
The implementation principle of the circulating hot air drying system for feed production is as follows: when material enters the inner material passage 21 through the feed pipe 23, hot air enters the outer hot air passage 22 through the air inlet pipe 32, and the motor 44 drives the first gear 45 and the second gear 45 to rotate.
The hot air will move from left to right in the outer hot air passage 22 to the connecting pipe 24, then the hot air will enter the inner hot air passage 11 through the connecting pipe 24 and move from right to left to the air outlet pipe 12, and finally the hot air is discharged from the air outlet pipe 12; the first gear 45 will drive the outer gear ring 42 to rotate, and the outer gear ring 42 will drive the inner spiral blade 25 to rotate through the inner ring 41, so that the inner spiral blade 25 can rotationally push and disperse the feed in the inner material channel 21; the second gear 45 will drive the inner gear ring 52 to rotate, and the inner gear ring 52 will drive the outer screw blades 36 to rotate through the outer ring 51, so that the outer screw blades 36 can rotationally push and disperse the feed in the outer material channel 33.
In the feed conveying process, the feed supporting plates 26 on the inner spiral blades 25 and the outer spiral blades 36 push the feed to rise spirally, so that the feed can be distributed into a spiral shape, the thickness of the spirally distributed feed is thinner, the feed in the inner material channel 21 is dispersed and clings to the outer side wall of the inner pipe 1 and the inner side wall of the inner cover 2, the hot air in the inner hot air channel 11 dries and heats the feed in the inner material channel 21 through the side wall of the inner pipe 1, and the hot air in the outer hot air channel 22 dries and heats the feed in the inner material channel 21 through the inner side wall of the inner cover 2; the fodder in the outer material passage 33 will be dispersed and cling to the outer side wall of the inner cover 2 and the inner side wall of the outer cover 3, and the hot air in the outer hot air passage 22 will dry and heat the fodder in the outer material passage 33 through the outer side wall of the inner cover 2.
To sum up, this application has prolonged the motion route of fodder as far as possible in limited space, has increased the contact time of steam through heat conduction object and fodder, and the inside, outside and the inboard of the fodder that the heliciform was arranged all can be heated, has increased the indirect area of contact of steam and fodder to the air-dry effect of fodder has been improved. The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (7)

1. A feed production is with circulation hot-blast air-drying system, its characterized in that: the inner tube (1), the inner cover (2) and the outer cover (3) are coaxially arranged in sequence from inside to outside, the inner tube (1) and the inner cover (2) are made of heat conducting materials, the outer cover (3) is made of heat insulating materials, the inner part of the inner tube (1) is hollow and forms an inner hot air channel (11), and an air outlet pipe (12) communicated with the inner hot air channel (11) is arranged on the inner tube (1);
the inner cover (2) is sleeved on the inner pipe (1), an inner material channel (21) is formed by surrounding the inner wall of the inner cover (2) and the outer side wall of the inner pipe (1), an outer hot air channel (22) is formed by being arranged between the inner wall of the inner cover (2) and the outer wall of the inner cover (2), a feed pipe (23) communicated with the inner material channel (21) and an air inlet pipe (32) communicated with the outer hot air channel (22) are arranged on the inner cover (2), and one end, far away from the air inlet pipe (32), of the outer hot air channel (22) is communicated with one end, far away from the air outlet pipe (12), of the inner hot air channel (11) through a connecting pipe (24);
the outer cover (3) is sleeved on the inner cover (2), an outer material channel (33) is formed by the inner wall of the outer cover (3) and the outer side wall of the inner cover (2), a discharging pipe (34) communicated with the outer material channel (33) is arranged on the outer cover (3), and one end, far away from the discharging pipe (34), of the outer material channel (33) is communicated with one end, far away from the feeding pipe (23), of the inner material channel (21) through a connecting channel (35);
an inner spiral blade (25) for pushing the feed from the feed pipe (23) to the connecting channel (35) is rotationally embedded in the inner material channel (21), an outer spiral blade (36) for pushing the feed from the connecting channel (35) to the discharge pipe (34) is rotationally embedded in the outer material channel (33), and the feed amount of the outer spiral blade (36) in unit time is not less than the feed amount of the inner spiral blade (25) in unit time;
the device also comprises an inner driving mechanism (4) for driving the inner spiral blade (25) to rotate and an outer driving mechanism (5) for driving the outer spiral blade (36) to rotate.
2. The circulating hot air drying system for feed production of claim 1, wherein: the communication part of the feeding pipe (23) and the inner material channel (21) is positioned between the end face of one end of the inner spiral blade (25) far away from the connecting channel (35) and the middle part of the inner spiral blade (25).
3. The circulating hot air drying system for feed production of claim 1, wherein: the connecting channel (35) is communicated with the outer material channel (33) and is positioned between the end face of one end of the outer spiral blade (36) far away from the discharging pipe (34) and the middle part of the outer spiral blade (36).
4. The circulating hot air drying system for feed production of claim 1, wherein: an inner rotating ring groove (29) communicated with the inner material channel (21) is formed in one end face of the inner cover (2), the inner driving mechanism (4) comprises an inner ring (41) rotationally embedded in the inner rotating ring groove (29), the inner ring (41) is coaxially connected with the inner spiral blade (25), and an outer tooth ring (42) is coaxially connected with the inner ring (41); the motor (44) is arranged on the inner cover (2), a first gear (45) is coaxially connected to an output shaft of the motor (44), and the first gear (45) is meshed with the outer gear ring (42).
5. The circulating hot air drying system for feed production of claim 4, wherein: an outer rotating ring groove (37) communicated with the outer material channel (33) is formed in one end face of the outer cover (3), the outer driving mechanism (5) comprises an outer ring (51) which is rotationally embedded in the outer rotating ring groove (37), the outer ring (51) is coaxially connected with the outer spiral blade (36), and an inner gear ring (52) is coaxially connected on the outer ring (51); the output shaft of the motor (44) is coaxially connected with a second gear (45), and the second gear (45) is meshed with the annular gear (52).
6. The circulating hot air drying system for feed production of claim 1, wherein: the inner spiral blade (25) and the outer spiral blade (36) are uniformly provided with a material supporting plate (26), and the material supporting plate (26) pushes feed to spiral upwards when being overturned upwards.
7. The circulating hot air drying system for feed production of claim 1, wherein: the feeding pipe (23) is the slope setting and is provided with two in the left and right sides symmetry of inner tube (1), and inner cover (2) are worn to locate in the low end of feeding pipe (23) and communicate in interior material passageway (21), and the high end intercommunication of two feeding pipes (23) has same feeder hopper (27), and feeder hopper (27) are located the outside of dustcoat (3), and the inside of feeder hopper (27) and the inside of two feeding pipes (23) enclose jointly and are branch material chamber (28) that are the setting of falling "Y" shape.
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