CN116898113A - Vacuum spraying device and preparation process of large yellow croaker puffed compound feed - Google Patents

Abstract

The application discloses a vacuum spraying device and a large yellow croaker puffing compound feed preparation process, and relates to the technical field of feed preparation.

Description

Vacuum spraying device and preparation process of large yellow croaker puffed compound feed

Technical Field

The application relates to the technical field of feed preparation, in particular to a vacuum spraying device and a preparation process of large yellow croaker puffed compound feed.

Background

The large yellow croaker is a unique local sea fish in China, has high nutritive value and delicious taste, is a popular edible fish, and is one of main varieties for fish feeding in China.

The vacuum spraying equipment is used for processing large yellow croaker feed, grease and other nutritional additives can be added into the expanded pellet feed by the vacuum spraying feed, the added grease and other liquids can be enabled to enter into the pellet, the energy level and the nutritional value of the feed are improved, and meanwhile, the liquid can be prevented from falling off and oxidizing on the surface of the pellet.

Referring to fig. 1 and 2, the vacuum spraying apparatus includes a case 1 for placing feed particles, a sealed space is formed in the case 1, a leak-proof feed valve 11 is welded above the case 1, a leak-proof discharge valve 12 is welded below the case 1, a circular plate is arranged on one side of the leak-proof feed valve 11 and one side of the leak-proof discharge valve 12, which faces the case 1, through opening the circular plate, feed particles can pass through, a baffle 17 and the case 1 form the sealed space together, paddles for stirring the feed particles are arranged in the case 1, a feed nozzle 13 is further arranged on the case 1, a vacuum exhaust pipe and an air compensation pipe are arranged at one end of the vacuum exhaust pipe, which is far away from the case 1, so that vacuum can be pumped into the case 1 through the vacuum exhaust pipe, the air compensation pipe is used for injecting air into the case 1, and the feed nozzle 13 can atomize and spray liquid into the case 1.

When the feed particles in the box body are coated, the box body is pumped into a vacuum state through the vacuum exhaust pipe, then the front driving blade rotates, and meanwhile oil mist is sprayed into the box body through the feeding spray head, the feed particles are mixed with the oil mist in the air under the continuous stirring of the blade, so that the surfaces of the feed particles are adhered with liquid, then air is injected into the box body through the air compensation pipe, and the liquid adhered to the surfaces of the feed particles is immersed into the feed particles under the pressure difference, so that the spraying process can be completed.

To the relevant technique among the above-mentioned, through paddle stirring fodder granule for the mode of fodder granule in the mixed air oil mist, because a large amount of fodder granule are piled up together, only be located the fodder granule on surface just can spray the oil mist, even through the paddle stirring, the effect is also not ideal, and the spraying rate of fodder granule is lower, has the room of improvement.

Disclosure of Invention

In order to improve the spraying rate of large yellow croaker feed particles, the application provides a vacuum spraying device, which adopts the following technical scheme:

the vacuum spraying device comprises a box body, a leakage-proof discharging valve is arranged below the box body, a feeding spray head is arranged on the box body, a spraying cavity and a material storage cavity are arranged in the space in the box body, the spraying cavity is communicated with the material storage cavity and is positioned above the material storage cavity, the material storage cavity is in a flaring shape, and the flaring of the material storage cavity faces the spraying cavity;

still include rotating the auger that sets up in the box, set up in be used for driving on the box the auger pivoted driving piece, and set up in the box first isolation tube, the auger set up in first isolation tube, first isolation tube and box upper end and lower extreme between all have the clearance that supplies the fodder granule to pass through, the auger comprises a central shaft and a spiral blade coiled on the periphery of the central shaft, the driving piece can drive the central shaft to rotate, the outer side wall of the spiral blade is abutted against the inner side wall of the first isolation pipe, and the auger extends into the material storage cavity;

the utility model discloses a fodder granule, including first isolation pipe, second isolation pipe, first isolation pipe outside lateral wall circumference is provided with first stock guide, first stock guide slope downward setting, box inside lateral wall circumference is provided with the second stock guide, the second stock guide slope downward setting, fodder granule can be by the auger is followed after first isolation pipe upper end is sent out, passes through in proper order first stock guide with the second stock guide falls into the stock intracavity.

By adopting the technical scheme and combining with the background technology, the feed particles are fed into the box body, the feed falls into the storage cavity of the box body, the auger is driven to rotate by the driving piece, the feed particles accumulated in the storage cavity can be upwards driven by the auger along the spiral blade of the auger, and after the feed particles are fed above the first isolation pipe by the auger, the feed particles pass over the upper surface of the first isolation plate and fall onto the first guide plate under the interaction of the centrifugal force of the rotation of the auger and the feed particles continuously conveyed upwards;

meanwhile, the feeding nozzle in the box body continuously sprays oil mist, the oil mist can fall on the first material guiding plate and the second material pouring plate, when feed particles pass through the first material guiding plate and the second material guiding plate, the oil mist in the box body can fall on the surface of the feed particles, and meanwhile, the oil mist on the first material guiding plate and the second material guiding plate can also rise on the surface of the feed particles;

moreover, through the mode of continuous conveying fodder granule of auger for at every turn send the fodder granule on the first stock guide not too many, can make more fodder granule expand to the oil mist, the fodder granule is rolling to the in-process of second stock guide from first stock guide, and the fodder granule is rolling constantly, can make fodder granule week side adhesion oil mist more even, thereby can improve the spraying rate to the large yellow croaker fodder.

Optionally, the jet orifice of feeding shower nozzle orientation the first stock guide direction, first stock guide with the second stock guide all is provided with a plurality ofly along first isolation pipe length direction, the feeding shower nozzle corresponds first stock guide is provided with a plurality ofly.

Through adopting above-mentioned technical scheme, set up a plurality of first stock guide and second stock guide to set up a plurality of feeding shower nozzles simultaneously and aim at first stock guide and spray, can increase the spraying rate to the large yellow croaker fodder.

Optionally, the first isolation pipe outside rotates and is connected with the second isolation pipe, first stock guide set up in second isolation pipe outside lateral wall, be provided with on the center pin and drive second isolation pipe pivoted driving medium.

Through adopting above-mentioned technical scheme, the driving medium drive second isolation pipe rotates, and the second isolation pipe can drive first stock guide and rotate to can drive the fodder granule that falls on first stock guide along first deflector and rotate. Because when the fodder granule falls on first stock guide, the spraying effect that the fodder granule that is located feeding shower nozzle place obtains is better, and the spraying effect that the fodder granule that keeps away from feeding shower nozzle place obtained is relatively poor, and the track when can driving the fodder granule and slide down is rotatory gliding through the rotation of first stock guide, even make the fodder granule that falls on first deflector and keep away from feeding shower nozzle place, after on the first stock guide of gliding down, the position of fodder granule can be close to feeding shower nozzle place more to reduce the possibility that there is the fodder granule spraying not to the oil mist.

Optionally, be provided with the baffle on the box inboard lateral wall, first stock guide deviates from the one end of second isolation pipe is provided with the connecting plate, offered on the baffle and supplied the connecting plate slot, the baffle is in same first stock guide week side is provided with a plurality of, adjacent have the clearance that supplies the fodder granule to pass through between the baffle, the feeding shower nozzle corresponds two adjacent baffle clearance department sets up.

Through adopting above-mentioned technical scheme, the connecting plate is pegged graft in the baffle to the baffle can restrict the fodder granule gliding on the first stock guide, makes fodder granule can only follow the clearance department of two adjacent baffles and falls, and the feeding shower nozzle sets up in two adjacent baffle clearance departments simultaneously, even makes the adhesion to the oil mist that the fodder granule that falls can both be better.

Optionally, the baffle is provided with the stirring piece, stirring piece slope setting, stirring piece's inclination with the inclination of first stock guide is parallel.

Through adopting above-mentioned technical scheme, be equipped with on the baffle and stir the material piece, when first stock guide rotates and drives the fodder granule and pass through stirring the material piece, stir the material piece and stir the fodder granule, can make the fodder granule obtain the upset on the one hand, another convenience can make constantly take place the friction between the fodder granule, makes the oil mist of fodder granule surface adhesion more even through the friction between the fodder granule.

Optionally, stir the material piece including stirring material ring and stirring material pole, stir the material pole rotate set up in on the baffle, stir the material piece along baffle extending direction interval is provided with a plurality of.

Through adopting above-mentioned technical scheme, disclose the concrete structure of stirring material spare, simultaneously, through stirring the rotation between material ring and the baffle and being connected for stirring the material ring and can rotate, thereby can improve the stirring effect to the fodder granule.

Optionally, be provided with the transfer line on the second isolation tube, the connecting rod deviates from the one end of second isolation tube is provided with the drive ring, the drive ring rotate connect in on the box, the conveyer including coaxial set up in first gear on the center pin outside lateral wall, and rotate set up in second gear on the box, be provided with the tooth on the inside lateral wall of drive ring, first gear with the second gear meshes, the second gear with the tooth meshes.

By adopting the technical scheme, the central shaft rotates to drive the first gear to rotate, the first gear can drive the second gear to reversely rotate, the second gear can drive the driving ring to rotate in the same direction as the second gear, namely, the rotation direction of the second isolation pipe is opposite to that of the auger, and the effect of dispersing feed particles sent from the auger can be achieved while the rotation of the second isolation pipe is realized, so that the spraying rate is improved; in addition, the second isolation pipe is rotationally connected to the box body through the transmission rod and the transmission ring, so that the second isolation pipe can be rotationally connected to the box body, and a space for feed particles to pass through is formed between the second isolation pipe and the inner side wall of the box body.

Optionally, a limiting ring is disposed on a side wall of the first isolation tube facing the second isolation tube, and a limiting groove for sliding the limiting ring is disposed on a side wall of the second isolation tube facing the first isolation tube.

Through adopting above-mentioned technical scheme, the spacing ring slides with in the spacing groove to can rotate the second isolation pipe with first isolation pipe and be connected, also can increase the stability of second isolation pipe simultaneously.

In a second aspect, the application provides a preparation process of a large yellow croaker puffed compound feed, which adopts the following technical scheme:

a preparation process of a large yellow croaker puffed compound feed comprises the following steps:

s1: mixing, namely mixing and stirring various feed raw materials;

s2: granulating, pulverizing the raw materials into powder, extruding the powder into strips, and cutting into granules;

s3: puffing, namely puffing the granular feed at 120-150 ℃;

s4: spraying, namely putting the puffed feed particles into the box body of the vacuum spraying device by using the vacuum spraying device, vacuumizing the box body, then conveying the feed particles falling into the material storage cavity upwards through the auger to fall onto the first material guide plate, spraying oil mist through the feeding spray nozzle, sequentially passing through the first material guide plate and the second material guide plate, adhering the oil mist on the surfaces of the feed particles in the sliding process, and then introducing air into the box body, so that the oil mist on the surfaces of the feed particles can be immersed into the feed particles under the action of pressure difference;

s5: drying, namely drying the feed particles at 60-80 ℃;

s6: packaging, and bagging the dried particles.

In summary, the present application includes at least one of the following beneficial effects:

1. the feed particles are conveyed upwards through the auger, and the feed particles roll through the first material guide plate and the second material guide plate in sequence and then fall into the material storage cavity, so that the feed particles can be accumulated in a less spraying manner, and the spraying time of the feed particles is longer and more uniform;

2. through rotating first stock guide to and set up and stir the material piece and stir the fodder granule, can further break up the fodder granule, thereby make fodder granule spraying rate higher.

Drawings

Fig. 1 is a schematic structural view of a related art;

fig. 2 is a schematic cross-sectional structure of a related art case;

fig. 3 is a schematic structural view of embodiment 1;

FIG. 4 is a schematic cross-sectional view of the case;

FIG. 5 is a schematic cross-sectional view of a first spacer tube;

FIG. 6 is a schematic structural view of a transmission member;

fig. 7 is an enlarged schematic view of the structure at a in fig. 5.

Reference numerals illustrate: 1. a case; 11. a leak-proof feed valve; 12. a leak-proof discharge valve; 13. a feed nozzle; 14. a spray cavity; 15. a material storage cavity; 16. a second guide plate; 17. a baffle; 171. a slot; 2. an auger; 21. a central shaft; 22. a helical blade; 3. a driving member; 4. a first isolation tube; 41. a first guide plate; 411. a connecting plate; 42. a limiting ring; 5. a transmission member; 51. a first gear; 52. a second gear; 6. a stirring piece; 61. a stirring ring; 62. a stirring rod; 7. a second isolation tube; 71. a transmission rod; 72. a drive ring; 721. teeth; 73. and a limit groove.

Detailed Description

The application is described in further detail below with reference to fig. 2-7.

Example 1:

the embodiment of the application discloses a vacuum spraying device, referring to fig. 3 and 4, the vacuum spraying device comprises a box body 1, wherein the upper part of the box body 1 is cylindrical, the lower part of the box body 1 is in an inverted round table shape, a corresponding upper space in the box body 1 is a spraying cavity 14 used for spraying feed particles, a lower space in the box body 1 is a storage cavity 15 used for containing the feed particles, and the storage cavity 15 is communicated with the spraying cavity 14. The upper surface of the box body 1 is welded with a leakage-proof feed valve 11, the lower surface of the box body 1 is welded with a leakage-proof discharge valve 12, and feed particles are put into the box body 1 from the leakage-proof feed valve 11 and discharged from the leakage-proof discharge valve 12 into the box body 1. The upper surface of the box body 1 is also welded with a vacuum exhaust pipe for exhausting the air in the box body 1 and an air compensation pipe for injecting the air into the box body 1.

Referring to fig. 4 and 5, the vacuum spraying apparatus further includes a packing auger 2 rotatably disposed in the case 1, a driving member 3 driving the packing auger 2 to rotate, and a first isolation pipe disposed in the case 1. Specifically, auger 2 includes center pin 21 and coils and welds in the helical blade 22 of center pin 21 week side, and center pin 21 sets up along vertical direction, and box 1 is worn to establish upwards to the center pin 21 upper end, and can rotate through sealed bearing etc. between center pin 21 lateral wall and the box 1 to be connected, and auger 2 lower extreme downwardly extending is in stock chamber 15.

The cross section of the first isolation tube 4 is circular, the auger 2 is positioned in the first isolation tube 4, the side wall of the helical blade 22 of the auger 2 is abutted against the side wall of the inner side of the first isolation tube 4, a certain distance is reserved between the upper surface of the first isolation tube 4 and the side wall of the box body 1, so that feed particles can pass through a gap between the first isolation tube 4 and the side wall of the box body 1, a connecting rod is welded at the lower end of the first isolation tube 4, the lower end of the connecting rod is welded on the inner side of the box body 1, the first isolation tube 4 can be fixed, and feed particles can also pass through the gap between the lower surface of the first isolation tube 4 and the side wall of the inner side of the box body 1.

Referring to fig. 3 and 4, the outer side wall of the first isolation pipe 4 is circumferentially provided with a first material guiding plate 41, the first material guiding plate 41 is obliquely downward arranged, a certain distance is reserved between the end part of the first material guiding plate 41 and the inner side wall of the box body 1, the inner side wall of the box body 1 is circumferentially welded with a second material guiding plate 16, the second material guiding plate 16 is also obliquely downward arranged, a certain distance is reserved between the second material guiding plate 16 and the outer side wall of the first isolation pipe 4, therefore, the first material guiding plate 41 and the second material guiding plate 16 are alternately arranged, the first material guiding plate 41 and the second material guiding plate 16 are both arranged in the spraying cavity 14, and feed particles are fed out of the first isolation pipe 4 from the auger 2 and then fall onto the first material guiding plate 41, can roll down onto the second material guiding plate 16 along the first material guiding plate 41 and finally roll into the material storage cavity 15. Simultaneously, auger 2 can upwards convey the fodder granule that is located the interior below position of stock chamber 15, falls on the surface when the fodder granule after spraying falls to make the fodder granule that is located the stock chamber 15 all can convey to first stock guide 41 and carry out the spraying.

The box 1 is further provided with a plurality of feeding spray heads 13, the feeding spray heads 13 can atomize substances such as grease and other nutrient solutions to be regulated into oil mist, the oil mist can fall on the surfaces of the first material guide plate 41 and the second material guide plate 16, when feed particles roll from the first material guide plate 41, the oil mist can fall on the surfaces of the feed particles, meanwhile, the oil mist on the surfaces of the first material guide plate 41 can be adhered to the surfaces of the feed particles, the driving piece 3 drives the auger 2 to rotate, the feed particles are continuously conveyed upwards, and the feed particles sprayed on the surfaces of the first material guide plate 41 and the second material guide plate 16 are less in quantity, the feed particles are not easy to accumulate, so that the feed particles have better spraying effect, the feed rolls continuously in the spraying process, and the feed particles are more uniformly sprayed on the surfaces of the feed particles.

Referring to fig. 3 and 4, further, the first material guiding plate 41 and the second material guiding plate 16 may be staggered along the vertical direction, in this embodiment, the first material guiding plate 41 and the second material guiding plate 16 are respectively provided with two material guiding plates, the injection opening of the material feeding nozzle 13 faces the direction of the first material guiding plate 41, and each first material guiding plate 41 may be correspondingly provided with two material feeding nozzles 13, so that the spraying effect on the feed particles is better.

Referring to fig. 3 and 4, optionally, the outer side of the first isolation tube 4 is rotatably connected with a second isolation tube 7, the cross section of the second isolation tube 7 is also circular, the inner side wall of the second isolation tube 7 is abutted against the outer side wall of the first isolation tube 4, and the first material guiding plate 41 is welded on the outer side wall of the second isolation tube 7. The upper surface welding of second isolation tube 7 has transfer line 71, and transfer line 71 can be circular pole, and transfer line 71 upper surface welding has transfer ring 72, and transfer ring 72 upper end rotates to be connected on box 1, can rotate through the bearing on the outside lateral wall of transfer ring 72 and be connected with box 1 to can realize the fixed of second isolation tube 7, second isolation tube 7 can rotate relatively in first isolation tube 4 simultaneously. The central shaft 21 is provided with a transmission member 5 for driving the second isolation tube 7 to rotate.

Referring to fig. 4 and 5, further, a plurality of limiting rings 42 are welded on the outer side wall of the first isolation tube 4, the limiting rings 42 may be disposed along the length direction of the first isolation tube 4, the cross section of each limiting ring 42 is dovetail-shaped, in other embodiments, the cross section of each limiting ring 42 may be rectangular or T-shaped, etc., a limiting groove 73 for sliding the limiting ring 42 is formed on the inner side wall of the second isolation tube 7, and the limiting groove 73 is formed circumferentially. The second isolation pipe 7 is driven to rotate through the transmission piece 5 to drive the first material guiding plate 41 to rotate, so that when the feed particles fall on the first material guiding plate 41, the feed particles can be further dispersed on the first material guiding plate 41 under the action of centrifugal force.

Referring to fig. 5 and 6, the driving member 3 may be a motor or a rotary cylinder, and in this embodiment, the driving member 3 is a motor, and an output end of the motor is connected to an upper end of the central shaft 21 of the packing auger 2. The transmission member 5 includes a first gear 51 coaxially welded to the outer side wall of the central shaft 21, and a second gear 52 rotatably connected to the inner side wall of the case 1, and teeth 721 are provided on the inner side wall of the transmission ring 72, the first gear 51 is engaged with the second gear 52, and the outer side wall of the second gear 52 is engaged with the teeth 721 on the inner side of the transmission ring 72.

Starting a motor to drive the central shaft 21 to rotate and drive the spiral blades 22 to rotate, so that feed particles in the material storage cavity 15 can be conveyed upwards; at the same time, the first gear 51 rotates to drive the driving ring 72 to rotate reversely, so that the second isolation tube 7 and the first material guiding plate 41 can rotate along the direction opposite to the auger 2, and further dispersion of feed particles is facilitated.

Referring to fig. 4 and 5, a baffle 17 is disposed on an inner side wall of the case 1, the baffle 17 is an arc plate, an inner arc of the baffle 17 corresponds to an arc of the first guide plate 41, the baffle 17 is disposed along a vertical direction, and a plurality of connecting rods are welded between the baffle 17 and the inner side wall of the case 1, so that the baffle 17 can be fixed on the case 1. The first stock guide 41 deviates from second isolation tube 7 one end integrated into one piece and has connecting plate 411, and connecting plate 411 level sets up, has offered the slot 171 that supplies connecting plate 411 to peg graft on the inboard lateral wall of baffle 17, and baffle 17 is provided with a plurality ofly in same first stock guide 41 week side, leaves the clearance that supplies the fodder granule to pass through between two adjacent baffles 17, and feeding shower nozzle 13 is provided with in the clearance department of two adjacent baffles 17 for the fodder granule can only fall from the clearance department of two baffles 17, thereby when the fodder granule falls down first stock guide 41, the homoenergetic is sprayed to the oil mist as far as possible.

In this embodiment, two baffles 17 are disposed on the periphery of the same first guide plate 41, two feed sprays are disposed corresponding to each first guide plate 41, and two feed sprays are disposed corresponding to the gaps between the two baffles 17.

Referring to fig. 5 and 7, the baffle 17 is provided with a stirring member 6, and the stirring member 6 is inclined in a direction parallel to the surface of the first guide plate 41, so that when the first guide plate 41 rotates, the feed particles on the first guide plate 41 can be stirred by the stirring member 6.

Specifically, the stirring piece 6 comprises a stirring ring 61 and a stirring rod 62, the stirring rod 62 is a round rod, the stirring ring 61 is rotationally connected to the inner side wall of the baffle 17, the cross section of the stirring ring 61 is a rectangular ring, and when feed particles pass through the stirring ring 61, the stirring ring 61 can be driven to move, so that the stirring ring 61 can play a role in stirring and scattering the feed particles, and oil mist on the surfaces of the feed particles is more uniform.

The implementation principle of the vacuum spraying device provided by the embodiment of the application is as follows: the feed particles to be sprayed are thrown into the box body 1 through the leakage-proof feed valve 11, fall into the storage cavity 15, then the feed spray head 13 and the driving piece 3 are started, the auger 2 is driven to rotate, the feed particles are continuously conveyed upwards, and fall onto the first feed guide plate 41 after passing through the first isolation pipe 4 and the second isolation pipe 7, along with the rotation of the first feed guide plate 41, the feed particles on the first feed guide plate 41 are mutually stirred through the stirring piece 6 under the action of the stirring piece 6, then fall from the gap between the two baffles 17, sequentially slide into the storage cavity 15 after passing through all the first feed guide plate 41 and the second feed guide plate 16, and thus the feed particles can be fully sprayed.

Example 2:

the embodiment of the application discloses a preparation process of a large yellow croaker puffed compound feed, which uses a vacuum spraying device in the embodiment 1 for processing and comprises the following steps:

s1: mixing, namely mixing and stirring various feed raw materials such as corn, bean paste, fish meal, fish oil, starch and the like through a stirrer;

s2: granulating, namely crushing the mixed raw materials into powder, extruding the powder raw materials into strips, and then cutting the strips into granules to obtain granular feed;

s3: puffing, namely puffing the granular feed at 120-150 ℃;

s4: spraying, using the vacuum spraying device in embodiment 1, putting the puffed feed particles into the box 1 of the vacuum spraying device, vacuumizing the box 1, then conveying the feed particles falling into the storage cavity 15 upwards through the auger 2 to fall onto the first guide plate 41, spraying oil mist through the feed nozzle 13, sequentially passing through the first guide plate 41 and the second guide plate 16, adhering the oil mist on the surfaces of the feed particles in the sliding process, and then introducing air into the box 1, so that the oil mist on the surfaces of the feed particles can be immersed into the feed particles under the action of pressure difference;

s5: drying, namely drying the feed particles at 60-80 ℃;

s6: packaging, and bagging the dried particles.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (9)

1. The utility model provides a vacuum spraying device, includes box (1), box (1) below is provided with leak protection bleeder valve (12), be provided with feeding shower nozzle (13), its characterized in that on box (1): the inner space of the box body (1) comprises a spraying cavity (14) and a material storage cavity (15), the spraying cavity (14) is communicated with the material storage cavity (15), the spraying cavity (14) is positioned above the material storage cavity (15), the material storage cavity (15) is in a flaring shape, and the flaring of the material storage cavity (15) faces the spraying cavity (14);

the novel feed storage box is characterized by further comprising an auger (2) which is rotationally arranged in the box body (1), a driving piece (3) which is arranged on the box body (1) and used for driving the auger (2) to rotate, and a first isolation pipe (4) which is arranged in the box body (1), wherein the auger (2) is arranged in the first isolation pipe (4), gaps for feed particles to pass through are reserved between the first isolation pipe (4) and the upper end and the lower end of the box body (1), the auger (2) comprises a central shaft (21) and helical blades (22) coiled on the periphery of the central shaft (21), the driving piece (3) can drive the central shaft (21) to rotate, the lateral walls of the helical blades (22) are abutted against the lateral walls of the inner sides of the first isolation pipe (4), and the auger (2) extends into the storage cavity (15).

The utility model discloses a feed storage device, including box (1), first isolation pipe (4) outside lateral wall circumference is provided with first stock guide (41), first stock guide (41) slope downward setting, box (1) inboard lateral wall circumference is provided with second stock guide (16), second stock guide (16) slope downward setting, fodder granule can be by auger (2) follow after first isolation pipe (4) upper end is sent out, passes through in proper order first stock guide (41) with in stock storage cavity (15) are fallen into to second stock guide (16).

2. A vacuum spraying device according to claim 1, characterized in that: the jet orifice of the feeding spray head (13) faces the direction of the first material guiding plate (41), a plurality of first material guiding plates (41) and a plurality of second material guiding plates (16) are arranged along the length direction of the first isolation pipe (4), and the feeding spray head (13) is provided with a plurality of first material guiding plates (41) correspondingly.

3. A vacuum spraying device according to claim 2, characterized in that: the first isolation pipe (4) is connected with a second isolation pipe (7) in a rotating mode, the first material guide plate (41) is arranged on the lateral wall of the outer side of the second isolation pipe (7), and the central shaft (21) is provided with a transmission piece (5) for driving the second isolation pipe (7) to rotate.

4. A vacuum spraying device according to claim 3, characterized in that: be provided with baffle (17) on box (1) inboard lateral wall, first stock guide (41) deviate from the one end of second isolation tube (7) is provided with connecting plate (411), offer on baffle (17) supply connecting plate (411) slot (171), baffle (17) are in same first stock guide (41) week side is provided with a plurality ofly, adjacent have the clearance that supplies the fodder granule to pass through between baffle (17), feeding shower nozzle (13) correspond adjacent two baffle (17) clearance department sets up.

5. A vacuum spraying apparatus according to claim 4, wherein: the baffle (17) is provided with a stirring piece (6), the stirring piece (6) is obliquely arranged, and the oblique direction of the stirring piece (6) is parallel to the oblique direction of the first material guide plate (41).

6. A vacuum spraying apparatus according to claim 5, wherein: the stirring piece (6) comprises a stirring ring (61) and a stirring rod (62), the stirring rod (62) is rotatably arranged on the baffle plate (17), and the stirring piece (6) is arranged at intervals along the extending direction of the baffle plate (17).

7. A vacuum spraying device according to claim 3, characterized in that: be provided with transfer line (71) on second isolation tube (7), the connecting rod deviates from the one end of second isolation tube (7) is provided with drive ring (72), drive ring (72) rotate connect in on box (1), driving medium (5) including coaxial set up in first gear (51) on center pin (21) outside lateral wall, and rotate set up in second gear (52) on box (1), be provided with tooth (721) on drive ring (72) inboard lateral wall, first gear (51) with second gear (52) are engaged with, second gear (52) with tooth (721) are engaged with.

8. A vacuum spraying device according to claim 3, characterized in that: a limiting ring (42) is arranged on the side wall of the first isolation tube (4) facing the second isolation tube (7), and a limiting groove (73) for sliding the limiting ring (42) is formed in the side wall of the second isolation tube (7) facing the first isolation tube (4).

9. A process for preparing a puffed compound feed for large yellow croaker using the vacuum spraying device as claimed in any one of claims 1 to 8, comprising the steps of:

s1: mixing, namely mixing and stirring various feed raw materials;

s2: granulating, pulverizing the raw materials into powder, extruding the powder into strips, and cutting into granules;

s3: puffing, namely puffing the granular feed at 120-150 ℃;

s4: spraying, namely putting the puffed feed particles into the box body (1) of the vacuum spraying device by using the vacuum spraying device in any one of claims 1-8, vacuumizing the box body (1), then conveying the feed particles falling into the material storage cavity (15) upwards through the auger (2) to fall onto the first material guide plate (41), spraying oil mist through the feeding nozzle (13), sequentially passing through the first material guide plate (41) and the second material guide plate (16), adhering the oil mist on the surfaces of the feed particles in the sliding process, and then introducing air into the box body (1), so that the oil mist on the surfaces of the feed particles can be immersed into the feed particles under the action of pressure difference;

s5: drying, namely drying the feed particles at 60-80 ℃;

s6: packaging, and bagging the dried particles.