CN108099009A - A kind of self-falling mixer with axial circulation and shunting stirring action - Google Patents

Abstract

The invention discloses a self-falling mixer with axial circulation and split flow stirring function, which comprises a frame, a power device and a mixer main body arranged on the frame; wherein, the mixer main body includes a fixed drum, a material bucket, a screw Stirring plate group, arc-shaped stirring device, turbine-shaped stirring plate, supporting shaft and a mixing drum with a cylindrical hollow body and one end opening. The mixing drum is placed horizontally and fitted on the supporting shaft. The frame is movably connected; the fixed drum is set at the opening end of the mixing drum, including an end cover set on the mixing drum and a cylindrical feeding and discharging device set on the support shaft. There are several material buckets, which are respectively along the circumference The direction is evenly distributed on the inner wall of the end cover; the spiral stirring blade group is set on the inner wall of the mixing drum; the arc-shaped stirring device is set on the support shaft close to the opening end of the mixing drum, and the turbine-shaped stirring blade is set on the supporting shaft far from the opening end of the mixing drum On; the power unit is a chain drive.

Description

A self-falling mixer with axial circulation and split flow stirring

technical field

The invention belongs to the technical field of concrete mixers, in particular to a self-falling mixer with axial circulation and split flow stirring functions.

Background technique

Concrete mixer is a special machine that prepares the mixture composed of raw materials such as cement, water, sand, stone and additives according to a certain proportion, into concrete that meets the quality requirements. Concrete mixer is an indispensable key equipment for modern high-quality, mass-produced concrete. As a type of mixer commonly used in concrete construction at present, the self-falling mixer realizes mixing according to the principle of self-falling. When working, the self-falling mixer mainly lifts the material in the mixing drum to a certain height by rotating the fixed mixing blade on the inner wall of the mixing drum. When the force is applied, the material falls by its own gravity. Since the falling height, time, speed, falling point and rolling distance of each material particle are different, the mutual position of the material is continuously redistributed to obtain uniform mixing.

This type of mixer has a simple structure, and there is no relative movement between the mixing blade and the mixing drum during work. The concrete material is mixed only by its own gravity, and the power consumption and wear of the working chamber are small. It is mainly used for mixing cement with less consumption and high strength. Ordinary plastic concrete with low and high fluidity. But at the same time, due to its own structural characteristics, the current self-falling mixer has inherent defects, which makes it difficult to guarantee the production quality and efficiency of concrete. On the one hand, the diameter of the mixing drum of the mixer is large, and the movement of the material in the working chamber is mainly in the circumferential and radial directions, lacking axial movement, so that it is impossible to make the raw materials input from one end of the mixing drum move rapidly along the axial direction to the mixing chamber. The other end of the barrel causes uneven distribution of materials in the axial direction, which affects the mixing uniformity of the entire mixing barrel space within a given time; moreover, the aggregates formed when cement is mixed with water often move in the form of a unit in a certain thickness of liquid In the phase, if it is only brought to a certain height by the blade and collides with itself, the range of shear generated is very limited, which is not enough to effectively destroy the aggregates, thereby increasing the consumption of cement and water, and seriously affecting the construction of finished concrete workability and hardening strength. On the other hand, when the material is rotated in the mixing drum of the self-falling mixer, it is affected by centrifugal force. If the rotating speed of the rotating mixing drum is equal to or exceeds the critical speed, the material will be attached to the inner wall of the mixing drum and rotate with it under the action of centrifugal force, which cannot reach Stirring purposes. Therefore, the traditional self-falling mixer has a critical speed limit, and it is impossible to increase the mixing intensity by increasing the mixing speed, resulting in insufficient mechanical strength of the mixing mechanism on the concrete material, long mixing time, unstable concrete mixing quality, and low mixing efficiency. Low, and poor material adaptability.

Contents of the invention

In order to solve the above-mentioned existing problems, the present invention provides a self-falling mixer with axial circulation and split-flow stirring functions. By improving the mixing drum and the stirring mechanism, the concrete material can realize rotary mixing on the basis of self-falling mixing. The axial circulation movement and split stirring effect in the barrel ensure that the materials are fully mechanically stirred in the entire mixing barrel space, which not only makes the materials quickly and evenly distributed in the axial direction and evenly in the entire mixing barrel space, but also helps to destroy Cement particles, thereby improving the quality and efficiency of concrete mixing.

The present invention adopts following technical scheme to solve:

A self-falling mixer with axial circulation and split flow stirring, including a frame, a power device and a mixer body arranged on the frame; wherein,

The main body of the mixer includes a fixed drum, a material bucket, a spiral stirring blade group, an arc-shaped stirring device, a turbine-shaped stirring blade, a support shaft, and a mixing drum with a cylindrical hollow cavity and an opening at one end. The mixing drum is placed horizontally and is set on the support On the shaft, both ends of the support shaft are movably connected with the frame;

The fixed drum is set at the opening end of the mixing drum, including an end cover set on the mixing drum and a cylindrical feeding and discharging device set on the support shaft. The outer wall of the end cover is fixedly connected with the frame, and the There is an end cover feed port for feeding materials, a discharge port is provided on the outside of the feed in and out device, a discharge port switch is provided directly above the discharge port, and the center of the feed in and out device is provided with a hole for being set on the support shaft. The central shaft hole, the inlet and outlet device is provided with a feed port on the circumference of the inlet and outlet device, and a rectangular slot is opened on the inner wall of the inlet and outlet device. The rectangular slot is connected with a feed baffle, and the feed baffle is located on the central axis. directly below the hole;

There are several material buckets, which are evenly distributed on the inner wall of the end cover along the circumferential direction;

The spiral stirring blade group is arranged on the inner wall of the mixing drum; the arc-shaped stirring device is set on the support shaft close to the opening end of the mixing drum, and the turbine-shaped stirring blade is set on the supporting shaft far away from the opening end of the mixing drum;

The power device includes a power output device and a sprocket transmission mechanism. The sprocket transmission mechanism includes a small sprocket, a large sprocket arranged in the circumferential direction of the mixing drum, and a chain set on the small sprocket and the large sprocket. The output of the power output device The end is used to drive the small sprocket to rotate.

The further improvement of the present invention is that, both sides of the outer wall of the end cover are provided with end cap fixing pieces, and each end cover fixing piece is provided with a threaded hole, and the outer wall of the end cover passes through the end cover fixing piece and the bolt passing through the threaded hole and the machine. The rack is fixedly connected.

A further improvement of the present invention is that a sealing ring is provided at the joint between the end cover and the mixing drum.

The further improvement of the present invention lies in that the feeding port of the feeding and discharging device is a circumferential opening with an included angle of 100 degrees, and the inclination angle of the feeding baffle is 30 degrees.

The further improvement of the present invention lies in that annular iron sheets are welded on both sides of each material bucket, one side of the annular iron sheet is tangent to the inner wall of the end cover, and the other side is welded at the opening end of the mixing drum.

The further improvement of the present invention is that the spiral stirring blade group includes a left spiral stirring blade, a middle spiral stirring blade and a right spiral stirring blade welded on the inner wall of the mixing drum in sequence from the opening end of the mixing drum; wherein, the size of the right spiral stirring blade is The largest, the width is 1/15 to 1/12 of the total length of the mixing drum, and the maximum helix angle is 45 degrees; the size of the left-handed agitator is next, the width is 4/5 of the right-helical agitator, and the helix angle is 20 degrees ;The size of the medium spiral stirring plate is the smallest, the width is 1/2 of the right spiral stirring plate, and the helix angle is 30 degrees;

The total horizontal length L1 of the left-hand spiral stirring piece is 1/5 of the length of the mixing cylinder; the total horizontal length L2 of the middle-helical stirring piece is 1.2 times of L1; the total length L3 of the right-hand spiral stirring piece is 1.5 times of L1; each part of the spiral The stirring pieces are composed of 3 spiral pieces of equal size, which are evenly distributed along the circumferential direction, and the stagger between each two adjacent spiral stirring pieces is 60 degrees.

The further improvement of the present invention is that the arc-shaped stirring device includes a first sleeve sleeved on the support shaft and several splitter blades and several arc-shaped stirring arms uniformly distributed in the circumferential direction on the first sleeve, and each splitter blade The ends of each are welded on the inner wall of the opening end of the mixing drum, and the ends of each arc-shaped stirring arm are welded on the inner wall away from the opening end of the mixing drum.

A further improvement of the present invention is that the turbine-shaped stirring blades include a second sleeve sleeved on the support shaft and several turbine-shaped stirring blades evenly distributed in the second sleeve in the circumferential direction, and the ends of each turbine-shaped stirring blades are Welded on the inner wall away from the open end of the mixing drum.

The further improvement of the present invention is that the power output device includes a motor base arranged on the frame, a motor arranged on the motor base, and a reducer whose input end is connected to the output end of the motor, and the output end of the reducer is used to drive The small sprocket turns.

A further improvement of the present invention is that both ends of the support shaft are movably connected with the machine frame through the bearing seat and the bearings arranged in the bearing seat.

The present invention has the following beneficial technical effects:

1. Compared with the traditional self-falling mixer, the present invention has two more mechanical stirring functions. One is to increase the axial circulation movement: by increasing the axial size of the mixing drum, and designing different spiral stirring blades and arc-shaped stirring arms on the inner wall of the mixing drum, the material not only has the circumferential and radial Movement, as well as cyclical movement along the axial direction of the mixing drum, ensure that the concrete material produces strong movement and complex motion trajectory in the mixing drum, so that the raw materials input from one end of the mixing drum are quickly distributed uniformly along the axial direction and spread throughout the mixing drum. Uniform mixing can be realized in the space of the barrel; the other has increased the function of shunt mixing: there are eight buckets at one end of the mixing barrel, which can bring the materials into the mixing barrel in batches in turn, and there are splitter blades at the place where the materials enter the mixing barrel , to divide the batched materials again, and the split materials are combined and mixed in the mixing drum, and finally circulated through the axial circulation to the feeding end of the mixing drum and then circulated and stirred again, so that the material particles are in the mechanical split. - Strong extrusion and collision will be generated under the action of confluence, which will destroy the agglomerated cement particle clusters. During the whole material mixing process, as long as the outlet switch is closed, the material will be repeated in the three mixing methods of split flow mixing, self-falling mixing and axial circulation mixing, which improves the mixing quality and efficiency of concrete.

2. The stirring mechanism of the present invention is integrated with the mixing drum, so that only the friction between materials and materials, and between materials and the stirring mechanism is overcome during the stirring process, which greatly reduces energy consumption. In addition, there is no relative movement between the mixing mechanism and the mixing drum, so there will be no jamming of crushed stones, so the gradation and performance of the produced concrete can be guaranteed, and the working noise is low.

3. In the present invention, the feed port and the discharge port are all designed on the same device, which is convenient for placement; and the present invention adopts a mode of matching a rotating drum and a fixed drum, so that the size of the required sealing ring is large, Good sealing effect and convenient repair and maintenance.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the front sectional view of the overall structure of the mixer of the present invention;

Fig. 3 is the left view of the overall structure of the mixer of the present invention;

Fig. 4 is the overall structural representation of mixing cylinder of the present invention;

Fig. 5 is the distribution schematic diagram of the helical stirring sheet of the inner wall of the mixing drum of the present invention;

Fig. 6 is the structural representation of the feeding and discharging part of the present invention;

Fig. 7 is the trajectory diagram when the material of the present invention is stirred;

Fig. 8 is a motion trajectory diagram when the material of the present invention is unloaded;

Fig. 9 is a partial schematic diagram of where the sealing ring of the present invention is located;

Fig. 10 is a schematic structural view of an arc-shaped stirring device of the present invention;

Fig. 11 is a schematic structural view of a turbine-shaped stirring blade of the present invention.

In the figure: 1—frame; 101—triangular bracket; 2—end cover; 201—end cover inlet; 202—end cover fixing piece; 3—discharge port; 4—discharge port switch; 5—bearing seat ;6—motor base; 7—motor; 8—reducer; 9—chain; 10—small sprocket; 11—big sprocket; 12—mixing drum; 13—material bucket; 1301—ring iron sheet; 14 —Splitter blade; 1401—first sleeve; 15—curved stirring arm; 16—left spiral stirring blade; 17—medium spiral stirring blade; 18—right spiral stirring blade; 19—turbine stirring blade; 1901—second Sleeve; 20—bearing; 21—support shaft; 22—feed baffle; 23—rectangular notch; 24—inlet and outlet device inlet; 25—central axis hole; 26—in and out device; 27—sealing ring ; 28—bolt; 29—threaded hole.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the present invention provides a self-falling mixer with axial circulation and split flow stirring function, including a power unit, a mixer main body and a frame 1 . The power unit includes a motor 7, a speed reducer 8, a chain 9, a small sprocket 10 and a large sprocket 11.

The frame 1 is set on the ground. The frame 1 is a frame structure, and a triangular bracket 101 is provided on one side of the bottom side of the frame 1 for placing the motor 7 . At the center of the two short sides on the top side of the frame 1, a bearing seat 5 is arranged, and the bearing seat 5 and the frame 1 are welded together. The main body of the mixer is divided into two parts, one part is a rotating drum, which includes a horizontal mixing cylinder body, a spiral stirring piece group on the inner wall of the mixing cylinder, a turbine-shaped stirring piece 19 welded together with the bottom end wall on the right side of the mixing cylinder, The material bucket 13 for loading materials welded together with the left end wall of the mixing drum, the arc-shaped stirring device for lifting materials installed in the space of the mixing drum 12, and the support shaft 21 passing through these parts. The other part of the main body of the mixer is the fixed drum, which consists of two parts: the end cover 2 and the feeding and discharging device 26, which are connected as a whole and cooperate with the working area of the material bucket 13. The power device includes a motor base 6, a motor 7, a reducer 8 and a chain drive, wherein the small sprocket 10 is connected to the reducer 8, and the large sprocket 11 is welded to the outer wall of the mixing drum 12 , both are driven by chain 9.

Specifically, the motor 7 is fixed on the motor frame 6 , and the motor frame 6 is welded on the tripod 101 . The motor 7 is connected with the reducer 8, the reducer 8 is connected with the small sprocket 10, and the large sprocket 11 is directly embedded on the outer wall of the mixing drum 12.

The spiral stirring plate group comprises a left spiral stirring plate 16, a middle spiral stirring plate 17 and a right spiral stirring plate, and the left spiral stirring plate 16, the middle spiral stirring plate 17 and the right spiral stirring plate 18 are all directly welded on the stirring plate on the inner wall of the cylinder 12. Among them, the right-helical stirring piece 18 has the largest size, the width is 1/15 to 1/12 of the total length of the mixing drum 12, and the maximum helix angle is 45 degrees; the size of the left-handed stirring piece 16 is next, and the width is 18 4/5 of that, the helix angle is 20 degrees; the middle helix stirring plate 17 has the smallest size, the width is 1/2 of the right helix stirring plate 18, and the helix angle is 30 degrees. The total horizontal length L1 of the left-hand spiral stirring piece 16 is 1/5 of the length of the mixing drum 12 . The total horizontal length L2 of the middle spiral stirring piece 17 is 1.2 times of L1. The total length L3 of the right-handed stirring piece 18 is 1.5 times of L1. Each part of the spiral stirring blades is composed of 3 spiral blades of equal size and uniformly distributed along the circumferential direction. Each adjacent two parts of the spiral stirring blades are staggered by 60 degrees, so that when the material passes through the boundary between the two adjacent parts of the spiral stirring blades, it will be diverted once for easy stirring. The helical directions of the left helical stirring piece 16 and the middle helical agitating piece 17 are opposite to the helical direction of the right helical agitating piece 18. When the material is lifted, the material is pushed to the right, while the helical direction of the right spiral stirring blade 18 is just opposite, and the material is pushed to the left.

The shape of the turbine-shaped stirring piece 19 is as shown in Figure 2 and Figure 11, and the described turbine-shaped stirring piece 19 is located at the bottom end of the right side of the mixing drum 12, and its helical direction is the same as that of the right-hand spiral stirring piece 18. same direction. The blades of the turbine-shaped stirring piece 19 contain 3 and are evenly distributed along the circumferential direction. The ends of the blades are welded together with the inner wall of the mixing drum 12, and the starting end is welded on the second sleeve 1901, and the second sleeve 1901 passes through the The support shaft 21 is welded at the right end of the support shaft 21 . The turbine-shaped stirring piece 19 is used to prevent the material from accumulating at the bottom of the mixing drum 12, and also to stir the material once.

The arc-shaped stirring device includes two parts, as shown in Fig. 2 and Fig. 10 , one part is a splitter blade 14 extending radially; the other part is an arc-shaped stirring arm 15 extending axially. The splitter blade 14 includes 6 blades and is evenly distributed along the circumference, its starting end is connected to the first sleeve 1401 , and its end is welded on the inner wall near the opening end of the mixing drum 12 . The splitter blades 14 play a role in supporting the mixing drum 12 on the one hand, and on the other hand play a role in diverting the material that has just entered the mixing chamber. There are three arc-shaped stirring arms 15, which are evenly distributed along the circumferential direction, and the cross-section of the end surface is approximately an "L" shape. The starting end of the arc-shaped stirring arm 15 is also welded on the first sleeve 1401 , and its end is welded together with the inner wall near the bottom of the mixing drum 12 . Since the inner wall of the mixing drum 12 is provided with a spiral stirring plate group, in order to avoid the arc-shaped stirring arm from penetrating the spiral stirring plate to affect the overall rigidity and increase the manufacturing difficulty, the welding place at the end is selected on the adjacent side of the right spiral stirring plate 18 The gap between the two spirals. The function of the arc-shaped stirring arm 15 is to push the material to the bottom of the mixing drum while lifting it. The first sleeve 1401 passes through the support shaft 21 and is welded at the left end of the support shaft 21 .

There are eight material buckets 13, which are evenly distributed along the circumferential direction. The two sides of the material bucket 13 are welded with annular iron sheets 1301, one side of the annular iron sheet 1301 is tangent to the inner wall of the end cover 2, and the other side of the annular iron sheet 1301 is tangent to the inner wall of the end cover 2. The side is welded on the leftmost end of the mixing drum 12, as shown in Figure 4. The material bucket 13 moves in a circular motion along with the mixing drum to bring the material into the mixing drum, and after the material is evenly stirred, it is taken out to the discharge port.

The fixed drum is shown in FIG. 6 , which includes two parts: the end cover 2 and the feeding and discharging device 26 . Just above the end cap 2 is provided with an end cap feeding port 201 for feeding materials. The two sides of the end cover 2 are provided with end cover fixing pieces 202, and two threaded holes 29 are provided on the end cover fixing piece 202 on each side, and the end cover 2 and the frame 1 are fixed on each other by bolts 28. Together. A sealing ring 27 is provided at the joint between the end cover 2 and the mixing drum 12 . The fixed drum is located at the left end of the mixing drum 12 and cooperates with the material bucket 13 part. The diameter of the end cap 2 is larger than that of the mixing drum 12, and its width is 1/6 of the length of the mixing drum 12. The feeding and discharging device 26 is cylindrical, and its end surface diameter is smaller than that of the mixing drum 12 and matches the inner side of the material bucket 13 , and its width is smaller than that of the end cover 2 . The discharge port 3 is at the highest point of the circumference of the feeding and discharging device 26 and is controlled by the discharge port switch 4 . When the discharge port switch is pulled out, the stirred material is brought into the discharge port 3 by the material bucket 13 for discharging. When the switch of the discharge port is closed, the material falls on the feed baffle plate 22 through the feed port 24 of the feeding and discharging device, and slides into the mixing drum 12 under the action of gravity for stirring. The feeding port 24 of the feeding and discharging device is a circumferential opening with an included angle of 100 degrees and is located on the feeding and discharging device 26. Looking from the end face to the bottom of the mixing drum, it is the direction from the horizontal rightmost end to 100 degrees counterclockwise. The inclination angle of the feed baffle plate 22 is 30 degrees, and its longer side is positioned directly below the central shaft hole 25 of the feeding and discharging device 26, and its shorter side communicates with the rectangular notch 23, and its two sides then connect with the The cylinder walls are connected. The rectangular notch 23 is located below the central axis hole 25 of the feeding and discharging device at 1/3 of the radius of its end face. The height of the rectangular notch 23 is the maximum size of the material. Generally, the size of the concrete stone is not more than 40mm, so the height can be selected as 50mm-80mm.

The central shaft hole 25 of the mixing drum 12, the turbine-shaped stirring blade 19, the splitter blade 14, the arc-shaped stirring arm 15 and the feeding and discharging device 26 all passes through the support shaft 21, wherein the turbine-shaped stirring blade 19 and the splitter blade 14. The arc-shaped stirring arm 15 and the mixing drum 12 are welded as a whole. The end of the support shaft 21 is connected with the bearing 20, the bearing 20 is fixed on the bearing seat 5, and the bearing seat 5 is welded on the frame 1. The ratio of the length of the mixing drum to the diameter of its end face is 3:2.

The working principle of the present invention is: as shown in Fig. 1, Fig. 6, Fig. 7 and Fig. 8, after the power is turned on, the motor 7 drives the small sprocket 10 to rotate along the direction of the arrow shown in the figure so that the mixing drum 12 rotates. When the outlet switch 4 is closed, the material enters the working chamber of the material bucket 13 through the end cover inlet 201, and part of the material directly passes through the inlet 24 of the feeding and discharging device and falls on the feeding baffle 22. Then slide out the rectangular notch 23 along the A direction and enter the mixing chamber; the rest of the materials that fall into the working chamber of the bucket 13 are lifted in batches in turn when the bucket is running, and when the material bucket 13 rotates to a higher When the height is high, the material in the bucket begins to fall. When the bucket 13 turns into the area of the feeding port 24 of the feeding and discharging device, the material lifted in batches falls on the baffle plate 22, and then slides out of the rectangular slot 23 to enter the mixing cavity. When the material passes through the rectangular notch 23, the material will be cut into several small parts because the splitter vane 14 rotates with the drum. 17 will lift the material along the B direction, and at the same time push the material to the bottom of the mixing drum for confluence movement. When the material enters the working area of the middle spiral stirring piece 17, because the size of the middle spiral stirring piece 17 is the smallest, the extent to which the material is lifted and pushed to the bottom begins to weaken. At this time, part of the material is lifted by the arc-shaped stirring arm 15 and falls , and then lift, and then fall, in the process of this cycle, the material is constantly moving to the bottom of the mixing drum. When the material enters the working area of the right-helical stirring piece 18, since the helical direction of the right-helical stirring piece 18 is opposite to that of the left-helical stirring piece 16 and the middle-helical stirring piece 17, and its size and helix angle are the largest, the material It is quickly pushed back along the C direction, and a small amount of material directly enters the bottom of the mixing drum under the action of the arc-shaped stirring arm 15, which is the working area of the turbine-shaped stirring piece 19. The helical directions of the stirring pieces 18 are the same, so the material is continuously pushed back into the working area of the right-handed stirring piece 18 under the action of the turbine-shaped stirring piece 19, and then pushed back. In the process of the material being pushed back, part of the material will continue to move towards the bottom of the mixing drum under the action of the left helical stirring piece 16 and the middle helical stirring piece 17, but most of the material will be pushed back to the working area of the material bucket 13 At this time, under the action of the material bucket 13, the material is lifted in batches again along the D direction, then falls along the E direction, and falls on the feed baffle plate 22 through the feed port 24 of the feeding and discharging device again. Slide out the rectangular notch 23, enter the stirring chamber, and circulate in sequence. During the whole material mixing process, as long as the outlet switch 4 is closed, the material will be repeated in the three stirring modes of split flow stirring, self-falling stirring, and axial circulation stirring. When the material is evenly stirred, turn on the outlet switch 4, the material still enters the mixing chamber along the direction A, and then is lifted along the direction B under the action of the left spiral stirring arm 16, the middle spiral stirring plate 17 and the arc stirring arm 15 and forward, for a confluent movement. Then return along the C direction under the action of the right-hand spiral stirring plate 18, then lift to the highest point along the D direction by means of the material bucket 13 and then fall along the E direction. The material inlet and outlet 3 are unloaded along the F direction; after the unloading is completed, the next cycle of stirring begins.

If the fluidity of the material to be stirred is poor, the bottom of the mixer can be tilted upwards by 4-5 degrees to facilitate unloading.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (10)

1. A self-falling mixer with axial circulation and shunt stirring is characterized in that it comprises a frame (1), and a power unit and a mixer main body arranged on the frame (1); wherein, The main body of the mixer includes a fixed drum, a material bucket, a spiral stirring blade group, an arc-shaped stirring device, a turbine-shaped stirring blade, a support shaft (21) and a mixing drum (12) with a cylindrical hollow cavity and an opening at one end. (12) placed horizontally and sleeved on the support shaft (21), both ends of the support shaft (21) are movably connected with the frame (1); The fixed drum is arranged at the opening end of the mixing drum (12), including an end cover (2) set on the mixing drum (12) and a cylindrical feeding and discharging device (26) set on the support shaft (21) , the outer wall of the end cover (2) is fixedly connected with the frame (1), and an end cover feed inlet (201) for feeding materials is arranged directly above it, and a discharge outlet (3) is provided on the outside of the inlet and outlet device (26). ), a discharge port switch (4) is provided directly above the discharge port (3), and a central shaft hole (25) for being sleeved on the support shaft (21) is provided at the center of the feed-in and discharge device (26). The circumference of the material device (26) is provided with a feeding port (24) for the feeding and discharging device, and a rectangular notch (23) is provided on the inner wall of the feeding and discharging device (26), and the rectangular notch (23) is connected with a feeding stop plate (22), and the feed baffle (22) is located directly below the central axis hole (25); There are several material buckets (13), which are evenly distributed on the inner wall of the end cover (2) along the circumferential direction; The spiral stirring piece group is arranged on the inner wall of the mixing cylinder (12); the arc-shaped stirring device is set on the support shaft (21) close to the opening end of the mixing cylinder (12), and the turbine-shaped stirring piece is set on the side far away from the opening end of the mixing cylinder (12). on the support shaft (21); The power device includes a power output device and a sprocket transmission mechanism, and the sprocket transmission mechanism includes a small sprocket (10), a large sprocket (11) arranged on the circumferential direction of the mixing drum (12) and a small sprocket (10) and The chain (9) on the large sprocket (11), the output end of the power take-off device is used to drive the small sprocket (10) to rotate. 2. A kind of self-falling mixer with axial circulation and shunt stirring according to claim 1, characterized in that, both sides of the outer wall of the end cover (2) are provided with end cover fixing pieces (202), each Threaded holes (29) are provided on each end cover fixed piece (202), and the outer wall of the end cover (2) passes through the end cover fixed piece (202) and the bolt (28) passing through the threaded hole (29) and the frame (1 ) fixed connection. 3. A kind of self-falling mixer with axial circulation and shunt stirring according to claim 1, characterized in that, a sealing ring ( 27). 4. A kind of self-falling mixer with axial circulation and shunt stirring effect according to claim 1, characterized in that, the feed inlet (24) of the feeding and discharging device is a circumferential opening with an included angle of 100 degrees, and the feed stop The inclination angle of the plate (22) is 30 degrees. 5. A self-falling mixer with axial circulation and split flow stirring according to claim 1, characterized in that, both sides of each material bucket (13) are welded with annular iron sheets (1301), and the annular One side of the iron sheet (1301) is tangent to the inner wall of the end cover (2), and the other side is welded at the opening end of the mixing drum (12). 6. A kind of self-falling mixer with axial circulation and shunt stirring according to claim 1, characterized in that, the spiral stirring plate group includes starting from the opening end of the mixing drum (12), and is successively welded on the mixing drum (12) 12) Left-helical stirring piece (16), medium-helical stirring piece (17) and right-helical stirring piece (18) on the inner wall; wherein, the size of right-helical stirring piece (18) is the largest, and the width is the total length of mixing cylinder (12) 1/15～1/12 of that, the maximum helix angle is 45 degrees; the size of the left helix stirring plate (16) is next, the width is 4/5 of the right helix stirring plate (18), and the helix angle is 20 degrees; The size of the middle spiral stirring plate (17) is the smallest, the width is 1/2 of the right spiral stirring plate (18), and the helix angle is 30 degrees; The total horizontal length L1 of the left-hand spiral stirring blade (16) is 1/5 of the length of the mixing tube; the horizontal total length L2 of the middle spiral stirring blade (17) is 1.2 times of L1; the total length L3 of the right-hand spiral stirring blade (18) It is 1.5 times of L1; each part of the spiral stirring blade is composed of 3 spiral blades of equal size, which are evenly distributed along the circumferential direction, and each adjacent two parts of the spiral stirring blade are staggered by 60 degrees. 7. A self-falling mixer with axial circulation and split flow stirring according to claim 1, characterized in that the arc-shaped stirring device includes a first sleeve (1401) sleeved on the support shaft (21) As well as several splitter blades (14) and several arc-shaped stirring arms (15) evenly distributed in the circumferential direction on the first sleeve (1401), and the end of each splitter blade (14) is welded to the mixing drum (12) On the inner wall of the opening end of each arc-shaped stirring arm (15), the end of each arc-shaped stirring arm (15) is welded on the inner wall away from the opening end of the mixing drum (12). 8. A self-falling mixer with axial circulation and split flow stirring according to claim 1, characterized in that, the turbine-shaped stirring blade includes a second sleeve (1901) sleeved on the support shaft (21) And several turbine-shaped stirring pieces (19) evenly distributed in the circumferential direction of the second sleeve (1901), and the end of each turbine-shaped stirring piece (19) is welded on the inner wall away from the opening end of the mixing drum (12). 9. A self-falling mixer with axial circulation and split flow stirring according to claim 1, characterized in that the power output device includes a motor base (6) arranged on the frame (1), a set The motor (7) on the motor base (6) and the reducer (8) whose input end is connected to the output end of the motor (7), the output end of the reducer (8) is used to drive the small sprocket (10) to rotate . 10. A kind of self-falling mixer with axial circulation and shunt stirring according to claim 1, characterized in that, both ends of the support shaft (21) pass through the bearing seat (5) and are arranged on the bearing seat ( 5) The inner bearing (20) is flexibly connected with the frame (1).