CN211754366U - Spiral rotor with cutter and feed mixer - Google Patents

Abstract

The utility model relates to a fodder stirring mixing apparatus field specifically indicates a band knife helical rotor and feed mixer, include the box and locate the inside a plurality of helical rotors that are used for the fodder to smash the stirring of box, helical rotor includes the main shaft and installs at the epaxial helical blade of main, installs a plurality of cutting blade on the helical blade edge, and cutting blade installation angle alpha is 85-90 degrees. The utility model has smaller blade installation angle, reduces the working resistance for cutting feed and prolongs the service life of the cutting blade; meanwhile, the blades occupy small space, so that the circular flow of the feed is realized, and the chopping efficiency is improved.

Description

Spiral rotor with cutter and feed mixer

Technical Field

The utility model relates to a fodder mixing plant field specifically indicates a band knife helical rotor and feed mixer.

Background

At present, the livestock breeding factory that has certain production scale can all be equipped with the mixed mixer of fodder, and wherein comparatively common mixed mixer of fodder is vertical many helical rotor's TMR mixed mixer of fodder, and it has set up a plurality of helical rotor that can rotate in the box, has arranged a plurality of knives on the helical blade. The blades cut the fodder, and simultaneously add all raw materials and water successively, and in the course of rotation, all the screw rotors rotate in the same direction of rotation to make the fodder continuously mix uniformly.

In order to reduce the working resistance of the cutting or to increase the cutting effect, alternatives are:

(1) the number of the knives is reduced, and the cutting effect and the working efficiency are reduced although the working resistance of cutting is reduced.

(2) The transmission power is increased, the cutting effect is enhanced, but the working cost and the manufacturing cost are increased, and meanwhile, the working stability and the reliability are low.

(3) The rotating speed is increased, and although the cutting mixing effect is enhanced, the resistance is increased.

(4) The cutter arm of the lengthened cutter has the advantages that although the cutting and mixing effects are enhanced, the resistance is increased, and meanwhile the function of pushing forwards is still weak.

In conclusion, the working resistance and the cutting effect of the cutting of the feed mixing and stirring machine are difficult to maintain, and the working conditions of small working resistance and good cutting effect are also provided, so that the search for a screw rotor and a feed mixing and stirring machine with small working resistance and good cutting effect becomes the direction of efforts of technicians in the field.

SUMMERY OF THE UTILITY MODEL

Based on above problem, the utility model provides a band knife helical rotor and feed mixer.

For solving the above technical problem, the utility model discloses a technical scheme as follows:

the utility model provides a band knife helical rotor for feed mixer, includes the main shaft and installs at the epaxial helical blade of main, installs a plurality of cutting blades on the helical blade edge, and cutting blade installation angle alpha is 85 ~ 90 degrees.

Preferably, a shovel plate is obliquely arranged at the bottom of the spiral blade.

As a preferred mode, a material distributing plate is installed at the bottom edge of the spiral blade, and the inclination direction of the material distributing plate is the same as that of the shovel plate.

In a preferred embodiment, the extended length h of the cutting blade attached to the uppermost end of the helical blade is 100mm to 200 mm.

The utility model provides a feed mixer, includes the box and locates inside a plurality of spiral rotors that are used for the fodder to smash the stirring of box, and spiral rotor includes the main shaft and installs the helical blade at main epaxial, installs a plurality of cutting blades on the helical blade edge, and cutting blade installation angle alpha is 85-90 degrees.

As a preferred mode, a shovel plate is obliquely arranged at the bottom of the spiral blade, a material distributing plate is arranged at the edge of the bottom of the spiral blade, the oblique direction of the material distributing plate is the same as that of the shovel plate, and the extending length h of a cutting blade arranged at the uppermost end of the spiral blade is 100-200 mm.

As a preferred mode, a guide plate is arranged at the adjacent position of the adjacent spiral rotors, the guide plate comprises a first curved surface, a discharging inclined surface and a second curved surface, and the first curved surface, the discharging inclined surface and the second curved surface are sequentially connected and tightly abut against the inner wall surface of the box body in an inclined manner; the first curved surface is an arc-shaped concave surface, the bottom edge of the first curved surface is arc-shaped and matched with the bottom edge of one of the adjacent spiral rotors, the discharging inclined plane is a plane, the bottom edge of the discharging inclined plane is tangent to the bottom edge of the spiral rotor corresponding to the first curved surface and extends to the bottom edge of the adjacent spiral rotor, the second curved surface is arc-shaped concave surface, and the bottom edge of the discharging inclined plane is arc-shaped and matched with the bottom edge of the other spiral rotor in the adjacent spiral rotor.

As a preferable mode, the plurality of screw rotors are composed of a first screw rotor and a second screw rotor, and the guide plates are arranged at the adjacent positions of the two sides of the first screw rotor and the second screw rotor; the bottom edge of a first curved surface of a guide plate at the joint of one side of the first spiral rotor and one side of the second spiral rotor is matched with the bottom edge of the first spiral rotor, the bottom edge of a discharging inclined plane is tangent to the bottom edge of the first spiral rotor and extends to the bottom edge of the adjacent second spiral rotor, and the bottom edge of the second curved surface is matched with the bottom edge of the second spiral rotor; the bottom edge of the first curved surface of the guide plate at the joint of the other sides of the first spiral rotor and the second spiral rotor is matched with the bottom edge of the second spiral rotor, the bottom edge of the discharging inclined plane is tangent to the bottom edge of the second spiral rotor and extends to the bottom edge of the adjacent first spiral rotor, and the bottom edge of the second curved surface is matched with the bottom edge of the first spiral rotor.

As a preferable mode, the ratio of the diameter R of the bottom of the spiral rotor to the distance H between the adjacent end points of the bottom edges of the discharging inclined planes of the guide plates at two sides in the box body is 11: 9.

As a preferable mode, the discharging inclined plane is a triangular plane, the first curved surface and the second curved surface are conical surfaces, the tops of the conical surfaces of the first curved surface and the second curved surface are superposed with the triangular top of the discharging inclined plane, and the ratio of the height h2 of the triangular top of the discharging inclined plane from the bottom of the box body to the height h1 of the spiral blade at the top of the spiral rotor from the bottom of the box body ranges from 1:1 to 1: 1.05.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the installation angle alpha of the cutting blade is 85-90 degrees, and the smaller installation angle of the cutting blade reduces the working resistance of cutting feed and prolongs the service life of the cutting blade; meanwhile, the blades occupy small space, so that the circular flow of the feed is realized, and the chopping efficiency is improved;

(2) the utility model discloses the slope of helical blade bottom is installed and is shoveled the board, and shovel board shovels the feed below helical blade in the helical blade space when the screw rotor rotates, then the fodder from the lower supreme spiral blade that rises along, and the diffusion falls to the periphery again, and continuous circulation cutting carries out, realizes the circulation from bottom to top of fodder to make the fodder cut up and fully mix in continuous operation process;

(3) the utility model discloses helical blade bottom edge installs and divides the flitch, divides flitch incline direction and shovel board syntropy. During the rotation of the screw rotor, great pressure is formed in front of the material distributing plate to force the feed to move upwards, inwards and outwards. Wherein, the feed enters the space of the spiral rotor by moving upwards and inwards to form a bottom-to-top circulation; the outward movement increases the speed of discharging and the force of entering the space of the screw rotor of the opposite side, and increases the interactive circulation l of the forage in the space of the multiple rotors;

(4) the utility model discloses the fodder gets into the rotatory curved surface that the first curved surface of guide plate and second curved surface circular-arc curved surface shape approximate rotor, and the resistance is little, and the flow is smooth and easy, effectively avoids box dead angle department between the spiral rotor to have the condition of long-pending material, and its plane of guide plate ejection of compact inclined plane is followed closely along the tangential direction and is connect the flow of fodder simultaneously, jumps out the microcirculation of this rotor, leads to in the space of another rotor, strengthens the material circulation effect between a plurality of spiral rotors;

(5) the utility model discloses first curved surface, ejection of compact inclined plane, second curved surface all are the slope form and arrange, ejection of compact inclined plane is the triangle-shaped plane, and first curved surface, second curved surface are the conical surface, and the conical surface summit of first curved surface, second curved surface coincides with the triangle-shaped summit of ejection of compact inclined plane, sets up first helical rotor and second helical rotor windrow department to the back taper stirring space that upper portion space is big, lower part space is little, realizes good fodder upper and lower circulation crushing stirring process;

(6) the ratio of the diameter R of the bottom of the spiral rotor to the distance H between the adjacent end points of the bottom edges of the discharging inclined surfaces of the guide plates at two sides in the box body is 11:9, so that the condition that stockpiles or feed cannot enter the first spiral rotor and the second spiral rotor mutually due to overlarge or undersize discharge ports formed by the guide plates at two sides is avoided;

(7) the ratio range of the triangular vertex on the discharging inclined plane to the height h2 of the bottom of the box and the ratio range of the spiral blade on the top of the spiral rotor to the height h1 of the bottom of the box is 1: 1-1: 1.05, so that the height h2 of the triangular vertex on the discharging inclined plane to the bottom of the box is equivalent to the height h1 of the spiral blade on the top of the spiral rotor to the bottom of the box, and the better feed up-down circulation mixing and crushing effect is realized.

Drawings

Fig. 1 is a front view of the screw rotor of the present invention.

Fig. 2 is a top view of the screw rotor of the present invention.

Fig. 3 is the installation schematic diagram of the material distributing plate and the scraper blade at the bottom of the screw rotor of the utility model.

Fig. 4 is a schematic view of the installation of the cutting blade of the screw rotor of the present invention.

Fig. 5 is a front view of the feed mixer of the present invention.

Fig. 6 is a top view of the feed mixer of the present invention.

Fig. 7 is a left side view of the feed mixer of the present invention.

Fig. 8 is a top view of the feed mixer with four screw rotors of the present invention.

The device comprises a box body 1, a spiral rotor 2, a first spiral rotor 21, a second spiral rotor 22, a material distributing plate 201, a scraping plate 202, a spiral blade 203, a cutting blade 204, a main shaft 205, a guide plate 3, a first curved surface 301, a second curved surface 302, a discharging inclined surface 303, a second guide plate 4, a third curved surface 401 and a second discharging inclined surface 402.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.

Example 1:

referring to fig. 1-4, a spiral rotor with cutter for feed mixer, includes the main shaft and installs the helical blade on the main shaft, installs a plurality of cutting blades on the helical blade edge, and cutting blade installation angle alpha is 85 ~ 90 degrees.

The main shaft is mainly used for mounting a helical blade, can be cylindrical rod-shaped or square, and is convenient to process in the embodiment shown in fig. 1, and the diameter of the main shaft is 450 mm; the helical blade is arranged on the rotating shaft in a spiral rising shape, the structural form is similar to that of a thread, and the pitch of the helical blade is 485 mm; the cutting blade is prior art, and its facet is the zigzag, is convenient for cut the fodder. The main difference between the embodiment and the prior art is that the installation angle alpha of the cutting blade is 85-90 degrees, the material at the bottom of the helical blade is thick, the cutting resistance is large, and the installation angle of the blade is small, so that the working resistance for cutting mixed feed is reduced, and the service life of the cutting blade is prolonged; meanwhile, the blades occupy small space, so that the circular flow of the feed is realized, and the chopping efficiency is improved.

During the use process, the tractor is found to have an overload phenomenon, and the overload phenomenon is judged to be caused by overlarge resistance of the spiral rotor. In order to reduce the working resistance of the screw rotor, the working effect is ensured, and the method of reducing the blade installation angle alpha is adopted while the number of the blades is not reduced. The specific method is that a mounting hole is machined beside a mounting hole on the back of the original blade, and the blade is mounted, so that the mounting angle alpha is reduced by 10 degrees and is measured between 85 degrees and 90 degrees. Through experimental detection, the resistance is reduced, and the tractor can easily work.

Further, in order to avoid material accumulation below the helical blade, referring to fig. 3, a shovel plate is obliquely installed at the bottom of the helical blade, when the helical rotor rotates, the shovel plate shovels the feed below the helical blade into the helical blade space, then the feed is circularly cut from bottom to top, so that the feed is circulated from bottom to top, and the feed is cut up and fully mixed in the continuous operation process.

Further, in order to prevent stacking on the blade surface of the spiral blade, a material distributing plate is installed at the edge of the bottom of the spiral blade, and the inclined direction of the material distributing plate is in the same direction as that of the shovel plate. During the rotation of the screw rotor, great pressure is formed in front of the material distributing plate to force the feed to move upwards, inwards and outwards. Wherein, the feed enters the space of the spiral rotor by moving upwards and inwards to form a bottom-to-top circulation; and the outward movement increases the speed of discharging and the force of entering the space of the screw rotor of the opposite side, and increases the interactive circulation of the forage in the space of the multiple rotors.

Further, in order to make the fodder stirring mix more evenly, install in the overhanging length h of helical blade topmost for 100mm ~ 200mm, because the material at helical blade top is lighter, the resistance of pressure, cutting that the blade bore is less, consequently with helical blade topmost cutting blade overhanging, improve the mixed effect of helical blade top material when guaranteeing its life.

Example 2:

the present embodiment is the feed mixing machine of the application device of embodiment 1, and the screw rotor having the same structure as that of the embodiment is used, and only the differences between the embodiment and embodiment 1 will be described.

Referring to fig. 4 ~ 7, a feed mixer, include the box and locate the inside a plurality of screw rotors that are used for the fodder to smash the stirring of box, a plurality of screw rotors comprise first screw rotor and second screw rotor, the guide plate is established in the department of bordering on of first screw rotor and second screw rotor both sides, the guide plate includes first curved surface, ejection of compact inclined plane, the second curved surface, first curved surface, ejection of compact inclined plane, the second curved surface connects gradually and is the slope form and near the box internal face, first curved surface is the arc concave surface, the rotating curved surface of rotor is approximated to the arc concave surface form, its base is the arc, ejection of compact inclined plane is the plane, the second curved surface is the arc concave surface, the rotating curved surface of rotor is approximated to the arc concave surface form, its base is the arc.

The bottom edge of a first curved surface of a guide plate at the joint of one side of the first spiral rotor and one side of the second spiral rotor is matched with the bottom edge of the first spiral rotor, the bottom edge of a discharging inclined plane is tangent to the bottom edge of the first spiral rotor and extends to the bottom edge of the adjacent second spiral rotor, and the bottom edge of the second curved surface is matched with the bottom edge of the second spiral rotor; the bottom edge of the first curved surface of the guide plate at the joint of the other sides of the first spiral rotor and the second spiral rotor is matched with the bottom edge of the second spiral rotor, the bottom edge of the discharging inclined plane is tangent to the bottom edge of the second spiral rotor and extends to the bottom edge of the adjacent first spiral rotor, and the bottom edge of the second curved surface is matched with the bottom edge of the first spiral rotor.

Wherein, the inside space that can install a plurality of screw rotors and guide plate that has of box can, its appearance can be diversified, general, for the convenience of screw rotor rotates smashes and promotes fodder back fodder and is convenient for fall back to the bottom half and circulates, and the inner space of every installation screw rotor of box is the obconic shape, and this kind of form also is the concrete form that present feed mixing mixer adopted at present.

The spiral rotor includes axis of rotation, spiral rising blade surface, and spiral rising blade surface is spiral rising form and installs in the axis of rotation, and its bottom diameter matches with box installation spiral rotor bottom diameter, and middle part diameter and top diameter reduce gradually, installs a plurality of cutting blades on the spiral rising blade surface, and this kind of structural style is the same with present current spiral rotor structure, and spiral rotor can guarantee to cut the fodder can. In order to further improve the screw rotor, referring to fig. 5, the angle alpha between the cutting edge of the cutting blade and the axis of the screw rotor is 85-90 degrees, so that the resistance is reduced, and the service life of the blade is prolonged; meanwhile, the blades occupy small space, so that the feed can flow circularly, and the feed falls down along the box body from top to bottom and from top to periphery, and the contact probability of the feed and the blades is increased in the lower circulating motion process, so that the chopping and stirring efficiency is improved.

The guide plate mainly comprises a first curved surface, a discharging inclined surface and a second curved surface, referring to fig. 1 and 2, the bottom edge of the first curved surface is matched with the bottom of the first spiral rotor, and the first curved surface mainly occupies part of the stacking space of the first spiral rotor, so that the dead volume of mixed and crushed feed is reduced; the bottom edge of the discharging inclined plane is tangent to the bottom of the first spiral rotor and extends to the bottom edge of the adjacent second spiral rotor, the discharging inclined plane mainly occupies part of the stacking space of the first spiral rotor and is arranged into a plane tangent to the first spiral rotor, and the first spiral rotor and the second spiral rotor of the feed can enter and mix with each other while the dead volume of the feed mixing and crushing is reduced; the bottom edge of the second curved surface is matched with the bottom of the second spiral rotor, and the second curved surface mainly occupies part of the stacking space of the second spiral rotor, so that the dead volume of mixed and crushed feed is reduced.

Further, for the convenience of fodder by box upper portion to falling along the box all around in first helical rotor and second helical rotor windrow department, first curved surface, ejection of compact inclined plane, the second curved surface all is the slope form and arranges, simultaneously in order to further strengthen about the material whereabouts backward flow effect, ejection of compact inclined plane is the triangle-shaped plane, first curved surface, the second curved surface is the conical surface, first curved surface, the conical surface summit of second curved surface and the triangle-shaped summit coincidence on ejection of compact inclined plane, it is big to set up first helical rotor and second helical rotor windrow department into the upper portion space so, the little back taper stirring space in lower part space, realize that good fodder circulates from top to bottom and smashes the stirring process.

Further, in order to facilitate the feed of the first spiral rotor to enter the second spiral rotor, referring to fig. 2, the ratio of the diameter R of the bottom of the spiral rotor to the distance H between the adjacent end points of the bottom edges of the discharge slopes of the guide plates at two sides inside the box body is 11:9, so as to avoid the situation that the stacked feed or the feed cannot enter the first spiral rotor and the second spiral rotor each other due to the too large or too small discharge ports formed by the guide plates at two sides.

Further, in order to avoid the situation that the feed vertical circulation effect is poor due to the fact that the height of the guide plate is too low or too high, referring to fig. 1, the ratio of the height h2 between the triangular vertex of the discharging inclined plane and the bottom of the box body to the height h1 between the spiral blade at the top of the spiral rotor and the bottom of the box body ranges from 1:1 to 1:1.05, the height h2 between the triangular vertex of the discharging inclined plane and the bottom of the box body is equal to the height h1 between the spiral blade at the top of the spiral rotor and the bottom of the box body, and therefore the good feed vertical circulation mixing and crushing. In the specific design, the height h2 between the triangular vertex of the discharging inclined plane and the bottom of the box body is 1250mm, and the height h1 between the top helical blade of the helical rotor and the bottom of the box body is 1200 mm.

The working process is as follows: adding a plurality of feeds to be crushed and mixed into the box body, simultaneously rotating the first spiral rotor and the second spiral rotor in the same direction, wherein the first spiral rotor and the second spiral rotor rotate and lift the feeds to be crushed stacked at the bottom and cut and crush the feeds, when the feeds enter a guide plate at one side of the box body, the first curved surface and the second curved surface successfully prevent the stacking condition at one side adjacent to the first spiral rotor and the second spiral rotor, the discharging inclined surface successfully guides the feeds into the second spiral rotor through the inclined surface of the discharging inclined surface, the feeds are also rotated and lifted and cut and crushed after entering the second spiral rotor, when the feeds enter the guide plate at the other side of the box body, the first curved surface and the second curved surface successfully prevent the stacking condition at the other side adjacent to the first spiral rotor and the second spiral rotor, and the discharging inclined surface successfully guides the feeds into the first spiral rotor through the inclined surface of the discharging inclined surface, finally, the processes of mutual flowing, crushing and mixing of the feed between the first spiral rotor and the second spiral rotor are completed.

The test process comprises the following steps: the experimental stirring is high-yield lactation grain, 500kg of alfalfa, 150kg of cottonseed, 1350kg of concentrate, 570kg of wine tank and 40kg of soda powder are added successively, then the device is started to stir, the mutual circulation effect of materials in the stirring process is good, the pulling effect is good, and the phenomenon of material accumulation is avoided. After 500kg of water is subsequently added, the upper part of the guide plate in the box body still circularly flows, so that the material accumulation phenomenon does not exist, and the material circulation effect of the two chambers from the upper part to the bottom is good.

Example 3:

this example differs from example 2 in that: a plurality of screw rotors are designed, and the guide plates are flexibly used.

This embodiment is the same as embodiment 2, and only the differences are indicated:

referring to fig. 8, a feed mixer, include the box and locate the inside a plurality of helical rotor that are used for the fodder to smash the stirring of box, a plurality of helical rotor comprise four helical rotor, four helical rotor are square and arrange, the guide plate is established in four helical rotor's the department of bordering on, four helical rotor's common region is provided with by four groups of third curved surfaces and, the second guide plate that second ejection of compact inclined plane is constituteed, the effect of guide plate is for preventing four helical rotor border on the windrow, the effect of second guide plate is for preventing four helical rotor's common region windrow and guide the material of circulation simultaneously, in addition, other parts of this embodiment are the same with embodiment 1, the no longer repeated description here.

It is worth noting that the four screw rotors are used for crushing and stirring the feed, and in addition, the number of the screw rotors can be three, five or more, and the screw rotors can be arranged in a shape like a Chinese character 'yi'. The guide plate or the spiral rotor structure with the first curved surface, the discharging inclined surface and the second curved surface is included in the protection scope of the application.

The embodiment of the present invention is the above. The above embodiments and specific parameters in the embodiments are only for the purpose of clearly showing the inventor's verification process, and are not intended to limit the scope of the present invention, which is still subject to the claims, and all structural changes made by applying the contents of the specification and drawings of the present invention are also included in the scope of the present invention.

Claims (7)

1. A bladed screw rotor comprising a main shaft (205) and a helical blade (203) mounted on the main shaft (205), said helical blade (203) having a plurality of cutting blades (204) mounted on its edge, characterized in that: cutting blade (204) installation angle alpha is 85 ~ 90 degrees, the shovel board is installed in helical blade (203) bottom slope, helical blade (203) bottom edge is installed and is divided flitch (201), divide flitch (201) incline direction and shovel board syntropy.

2. A bladed screw rotor according to claim 1, characterized in that: the overhanging length h of the cutting blade (204) installed at the uppermost end of the helical blade (203) is 100 mm-200 mm.

3. The utility model provides a feed mixer, includes box (1) and locates inside a plurality of helical rotor (2) that are used for the fodder to smash the stirring of box (1), helical rotor (2) include main shaft (205) and install helical blade (203) on main shaft (205), install a plurality of cutting blade (204) on helical blade (203) edge, its characterized in that: cutting blade (204) installation angle alpha is 85-90 degrees, the shovel board is installed in helical blade (203) bottom slope, helical blade (203) bottom edge is installed and is divided flitch (201), divide flitch (201) incline direction and shovel board syntropy, install in helical blade (203) the top cutting blade (204) overhanging length h is 100mm ~ 200 mm.

4. A feed mixing machine according to claim 3 wherein: a guide plate (3) is arranged at the adjacent position of the adjacent spiral rotors (2), the guide plate (3) comprises a first curved surface (301), a discharging inclined surface (303) and a second curved surface (302), and the first curved surface (301), the discharging inclined surface (303) and the second curved surface (302) are sequentially connected and abut against the inner wall surface of the box body (1) in an inclined manner; the first curved surface (301) is an arc-shaped concave surface, the bottom edge of the first curved surface is arc-shaped and is matched with the bottom edge of one spiral rotor (2) in the adjacent spiral rotors (2), the discharging inclined surface (303) is a plane, the bottom edge of the discharging inclined surface is tangent to the bottom edge of the spiral rotor (2) corresponding to the first curved surface (301) and extends to the bottom edge of the adjacent spiral rotor (2), the second curved surface (302) is arc-shaped concave surface, and the bottom edge of the discharging inclined surface is arc-shaped and is matched with the bottom edge of the other spiral rotor (2) in the adjacent spiral rotor (2).

5. A feed mixing machine according to claim 4 wherein: the spiral rotors (2) consist of a first spiral rotor (21) and a second spiral rotor (22), and the guide plates (3) are arranged at the adjacent positions of the two sides of the first spiral rotor (21) and the second spiral rotor (22);

the bottom edge of a first curved surface (301) of the guide plate (3) at the joint of one sides of the first spiral rotor (21) and the second spiral rotor (22) is matched with the bottom edge of the first spiral rotor (21), the bottom edge of a discharging inclined plane (303) is tangent to the bottom edge of the first spiral rotor (21) and extends to the bottom edge of the adjacent second spiral rotor (22), and the bottom edge of a second curved surface (302) is matched with the bottom edge of the second spiral rotor (22);

the bottom edge of a first curved surface (301) of the guide plate (3) at the joint of the other sides of the first spiral rotor (21) and the second spiral rotor (22) is matched with the bottom edge of the second spiral rotor (22), the bottom edge of the discharging inclined surface (303) is tangent to the bottom edge of the second spiral rotor (22) and extends to the bottom edge of the adjacent first spiral rotor (21), and the bottom edge of the second curved surface (302) is matched with the bottom edge of the first spiral rotor (21).

6. A feed mixing machine according to claim 5 wherein: the ratio of the diameter R of the bottom of the spiral rotor (2) to the distance H between the end points adjacent to the bottom edges of the discharging inclined planes (303) of the guide plates (3) on the two sides in the box body (1) is 11: 9.

7. A feed mixing machine according to claim 4 wherein: the discharging inclined plane (303) is a triangular plane, the first curved surface (301) and the second curved surface (302) are conical surfaces, the vertex of each conical surface of the first curved surface (301) and the second curved surface (302) is superposed with the vertex of the triangle of the discharging inclined plane (303), and the ratio of the height h2 of the vertex of the triangle of the discharging inclined plane (303) from the bottom of the box body (1) to the height h1 of the spiral blade (203) at the top of the spiral rotor (2) from the bottom of the box body (1) ranges from 1:1 to 1: 1.05.

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