A vertical mixer

Abstract

This invention discloses a vertical mixer, including a support frame, on which a material cylinder is fixedly mounted. The bottom of the material cylinder has an open discharge port, and a bearing seat is located inside the lower part of the material cylinder. The bearing seat is fixedly connected to the material cylinder via multiple spaced-apart lower support arms. A top plate with a central feed channel is fixedly mounted on the top of the material cylinder. A rotary bearing with an inner ring fixed to the top plate and an outer ring poweredly connected to a drive device mounted on the top plate is connected to the top plate. An upper turntable is fixedly connected to the outer ring of the rotary bearing. A shaft seat is located inside the upper part of the material cylinder, and the shaft seat is fixedly connected to the upper turntable via multiple spaced-apart upper support arms. The upper turntable, shaft seat, and upper support arms constitute an upper rotating support frame. A stirring shaft with several stirring arms is located inside the material cylinder. The upper end of the stirring shaft is fixedly connected to the shaft seat, and the lower end is rotatably connected to the bearing seat via a bearing. A water spraying device for spraying water into the material cylinder is located on the inner wall of the feed channel. This machine has low energy consumption, good stirring effect, and high production efficiency.

Description

Technical Field

[0001] The invention relates to a mixer, in particular to a vertical mixer. Background Art

[0002] Stabilized soil is a mixture of ash (such as cement) and aggregate (such as soil) and is widely used in road construction. At present, stabilized soil is processed by mixing in a horizontal mixer; a feed port is provided at the upper part of one end of the horizontal mixer and a discharge port is provided at the lower part of the other end. After the material enters the mixer from the feed port, it is stirred and pushed out of the discharge port by the stirring arm on the stirring shaft; during the mixing process, the stirring arm not only turns the material over, but also pushes the material out of the mixer. Therefore, the rotation of the stirring shaft requires a very large driving force, which is not conducive to energy saving and consumption reduction. Summary of the invention

[0003] In view of the defect of high energy consumption of the above-mentioned horizontal mixer, the technical problem to be solved by the present invention is to provide a vertical mixer with low energy consumption.

[0004] In order to solve the above technical problems, the present invention provides a vertical mixer with the following structure, including a bracket, and its structural features are: a barrel is fixedly installed on the bracket, an open feeding port is provided at the bottom of the barrel, a bearing seat is provided in the lower part of the barrel, and the bearing seat is fixedly connected to the barrel through a plurality of lower support arms with spacer rings; a top plate with a feeding channel provided in the center is fixedly installed on the top of the barrel, a slewing bearing with an inner ring fixed to the top plate and an outer ring dynamically connected to a driving device installed on the top plate is connected to the top plate, an upper turntable is fixedly connected to the outer ring of the slewing bearing, and an axle seat is provided in the upper part of the barrel, the axle seat is fixedly connected to the upper turntable through a plurality of upper support arms with spacer rings, and the upper turntable, the axle seat and the upper support arm constitute an upper rotating bracket; a stirring shaft connected to a plurality of stirring arms is provided in the barrel, the upper end of the stirring shaft is fixedly connected to the axle seat, and the lower end is rotatably connected to the bearing seat through a bearing; a water spraying device for spraying water into the barrel is provided on the inner wall of the annular feeding channel.

[0005] The vertical mixer includes a material distributor, which includes a conical material guide cover located above the stirring shaft and capable of rotating with the stirring shaft, a plurality of spaced-apart partitions are arranged around the material guide cover, a material transfer channel is formed between adjacent partitions, a dynamic feed pipe located in the feed channel is connected to the top of the partition, the inner cavity of the dynamic feed pipe is communicated with the material transfer channel, a plurality of spiral blades are arranged on the outer wall of the dynamic feed pipe, a top cover is provided at the upper end of the feed channel, a fixed feed pipe inserted into the dynamic feed pipe is fixedly connected to the top cover, and a feed port is provided on the top cover or the side wall of the feed channel.

[0006] The number of the partitions is the same as the number of the upper support arms and their positions correspond one to one, so that the material transfer channels and the blanking gaps formed between adjacent upper support arms are arranged in a one-to-one correspondence.

[0007] The stirring arms are arranged in a plurality of groups at different heights along the stirring shaft, each group being composed of a plurality of stirring arms arranged in a spaced ring; and two groups of stirring arms adjacent to each other are arranged at staggered set angles.

[0008] A lower turntable located above the bearing seat is provided in the barrel, and the lower turntable is fixedly connected to the stirring shaft through a middle support arm with multiple spacer rings. The lower turntable and the middle support arm constitute a lower rotating bracket, and multiple columns with spacer rings are provided between the lower turntable and the upper turntable, the upper ends of the columns are connected to the upper turntable, and the lower ends are connected to the lower turntable; the outer ends of the stirring arms are fixedly connected to the columns at the corresponding positions.

[0009] The inner end of the stirring arm is connected to the stirring shaft in a plug-in manner.

[0010] The column is fixedly connected with an air hammer seat, on which an air hammer is mounted. The air hammer strikes the air hammer seat or the column to cause the stirring arm to vibrate. The lower end of the stirring shaft is connected with a rotary joint, and the air hammer is connected to the rotary joint through a vent pipe arranged in the stirring shaft.

[0011] The upright column is fixedly connected with a scraper which can scrape off the material adhered to the inner wall of the barrel.

[0012] A dust cover is provided above the bearing seat to prevent materials from entering the bearing seat and to rotate with the stirring shaft.

[0013] The stirring arm is arc-shaped.

[0014] The driving device is started to drive the outer ring of the slewing bearing to rotate, and the rotating outer ring drives the stirring shaft to rotate through the upper rotating bracket. The ash and aggregate enter from the top of the vertical mixer and water is supplied to the water spray device through the water supply device. The ash, aggregate and water will naturally fall and mix in the process of falling in the barrel. In addition, the forced stirring and mixing of the stirring arm will turn the ash, aggregate and water into a uniformly mixed stable soil and flow out from the discharge port at the bottom of the barrel. Since the stable soil formed by the mixture of ash, aggregate and water falls naturally by gravity, no driving force is required, and the stirring shaft only needs to provide stirring force. Therefore, the vertical mixer provided by the present invention has greatly reduced energy consumption compared to the horizontal mixer in which the stirring shaft needs to provide both stirring force and driving force for the output of the stable soil. In addition, the vertical mixer provided by the present invention also has the advantages of good stirring effect and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the structural principle of a vertical mixer;

[0017] Figure 2 yes Figure 1 A-direction view;

[0018] Figure 3 is a structural schematic diagram of an upper rotating bracket;

[0019] Figure 4 It is a structural schematic diagram of a material distributor;

[0020] Figure 5 is along Figure 4 Sectional view along the midline BB;

[0021] Figure 6 It is a schematic diagram of the structure of the stirring arm;

[0022] Figure 7 yes Figure 1 Enlarged view of the upper portion of the stand mixer shown. DETAILED DESCRIPTION

[0023] Reference Figure 1 , Figure 2 and Figure 7 The present invention provides a vertical mixer, including a bracket 1, on which a barrel 2 is fixedly mounted, the bottom of the barrel 2 is provided with an open discharge port 3, a bearing seat 4 is provided in the lower part of the barrel 2, the bearing seat 4 is fixedly connected to the barrel 2 through a plurality of lower support arms 5 arranged at intervals, and materials can pass between two adjacent lower support arms 5; a top plate 7 is fixedly mounted on the top of the barrel 2, and a slewing bearing 8 is connected to the bottom surface of the top plate 7, the inner ring of which is fixedly connected to the top plate 7, and the outer ring is dynamically connected to a driving device installed on the top plate, the outer ring of the slewing bearing 8 is a gear ring, the driving device is a motor 29 and a gearbox 30, and a gear 35 meshing with the outer ring is mounted on the output shaft of the gearbox, and the outer ring is dynamically connected to the driving device through the gear meshing therewith, and the driving device is composed of two sets. The slewing bearing 8 is an existing mechanical component, which is also called a turntable bearing, also known as a rotating bearing or a swivel bearing; its structure is not described here in detail. The outer ring of the slewing bearing 8 is fixedly connected to the rotating bracket, refer to Figure 1 Combined with Figure 3 and Figure 7The upper rotating bracket includes an upper turntable 9 and a shaft seat 10. The shaft seat 10 is fixedly connected to the upper turntable 9 through a plurality of upper support arms 11 arranged at intervals. The upper turntable 9 is fixedly connected to the outer ring of the slewing bearing 8. A blanking gap 31 is formed between two adjacent upper support arms 11. A stirring shaft 13 is arranged in the barrel 2. A plurality of stirring arms 12 are connected to the stirring shaft 13. The upper end of the stirring shaft 13 is fixedly connected to the shaft seat 10, and the lower end is rotatably connected to the bearing seat 4 through a bearing. A feed channel 6 is arranged at the center of the top plate 7. The feed channel 6 is cylindrical. A water spray device 14 for spraying water into the barrel 2 is arranged around the inner wall of the feed channel 6. The water spray device 14 is a water inlet pipe arranged around the inner wall of the feed channel 6. The water inlet pipe is provided with a plurality of water outlets evenly distributed. The feed channel 6 is provided with a water inlet connected to the water inlet pipe. The water inlet is not shown in the figure. The material can enter the barrel 2 from the feed channel 6, but this can easily cause uneven material distribution and affect the mixing effect. In order to evenly scatter the material, a material distributor can also be provided on the vertical mixer.

[0024] Reference Figure 1 Combined with Figure 4 and Figure 5The material distributor includes a conical material guide cover 15 and the above-mentioned feed channel 6. The conical material guide cover is partially or completely located in the feed channel. A plurality of spaced partitions 16 are arranged around the material guide cover 15, and a feed channel 34 is formed between adjacent partitions. A dynamic feed pipe 17 located in the feed channel 6 is connected to the top of the partition 16. The inner cavity of the dynamic feed pipe 17 is connected to the feed channel 34. A plurality of spiral blades 18 are arranged on the outer wall of the dynamic feed pipe 17. A top cover 19 is provided at the upper end of the feed channel 6. A fixed feed pipe 20 inserted into the dynamic feed pipe 17 is fixedly connected to the top cover 19. A gap is provided between the dynamic feed pipe 17 and the fixed feed pipe 20. A feed port 21 is provided on the top cover 19 or the side wall of the feed channel 6. The feed port 21 shown in the figure is arranged on the side wall of the feed channel 6. The partition 16 does not extend to the top of the conical guide cover 15, so that a larger falling space can be formed between the dynamic feed pipe 17 and the conical guide cover 15, so that the ash flowing out of the dynamic feed pipe 17 can flow smoothly into the material passage 34. The partition 16 is quadrilateral, the bottom edge of the partition 16 is connected to the conical guide cover 15, and the outer side of the partition 16 is parallel to the axis of the dynamic feed pipe 17. The outer side of the plate 16 is parallel to the axis of the dynamic feed pipe 17 so that the partition 16 does not block the falling of the aggregate in the feed channel 6. If the partition 16 is directly welded to the dynamic feed pipe 17, there will be scattered local welding between the dynamic feed pipe 17 and the partition 16, which will cause the problem of loose connection. To overcome this defect, a cone sleeve 36 whose outer surface is welded to the dynamic feed pipe 17 and the spiral blade 18 is provided on the lower end of the dynamic feed pipe 17, and the top edge of the partition 16 is welded to the inner surface of the cone sleeve; the setting of the cone sleeve 36 can greatly improve the connection strength between the dynamic feed pipe 17 and the partition 16. The guide cover 15 is located above the stirring shaft 13 and is connected to the upper rotating bracket; the number of the partitions 16 is the same as the number of the upper support arms 11, Figure 5 There are four partitions 16 shown in the figure, and there should also be four upper support arms 11. The positions of the four partitions 16 correspond to the positions of the four upper support arms 11, that is, one partition 16 is arranged corresponding to one upper support arm 11, so that the transfer channel and the blanking gap 31 formed between adjacent upper support arms 11 are arranged in a one-to-one correspondence, that is, each transfer channel corresponds to a blanking gap.

[0025] Reference Figure 1, the stirring arms 12 are arranged in multiple groups at different heights along the stirring shaft 13, that is, multiple groups of stirring arms 12 are respectively located at different heights on the stirring shaft 13, and each group is composed of multiple stirring arms 12 arranged in a ring at intervals; two groups of stirring arms 12 adjacent to each other are staggered at a set angle. For example, the staggered angle is set to 60°, and in order from top to bottom, the first group is used as a reference, the stirring arms of the second group are staggered 60° relative to the stirring arms of the first group, and the stirring arms of the third group are staggered 60° relative to the stirring arms of the second group, and so on, until the set number of groups is arranged. The barrel 2 is provided with a lower turntable 22 located above the bearing seat 4. The lower turntable 22 is fixedly connected to the stirring shaft 13 through a plurality of middle support arms 23 with spacer rings. The lower turntable 22 and the middle support arms 23 constitute a lower rotating bracket. A plurality of columns 24 with spacer rings are provided between the lower turntable 22 and the upper turntable 9. The upper end of the column 24 is connected to the upper turntable 9 and the lower end is connected to the lower turntable 22. The outer end of the stirring arm 12 is fixedly connected to the column 24 at the corresponding position. After the outer end of the stirring arm 12 is fixedly connected to the column 24, the column 24 and the stirring shaft can support the stirring arm 12 at both ends, which can effectively improve the strength of the stirring arm 12 and make the stirring arm 12 not easily damaged. In order to facilitate the replacement of the stirring arm 12, the inner end of the stirring arm 12 is connected to the stirring shaft 13 in a plug-in manner. In this way, after the column 24 is removed, the stirring shaft 13 connected to the column 24 can be separated from the stirring shaft. A dust cover 33 is provided above the bearing seat 4 to prevent materials from entering the bearing seat 4 and rotates with the stirring shaft. The dust cover 33 can be fixedly connected to the stirring shaft or to the lower rotating bracket.

[0026] Reference Figure 1 The upper part of the column 24 is fixedly connected with an air hammer seat 25, and an air hammer 32 is installed on the air hammer seat 25. The air hammer 32 strikes the air hammer seat 25 or the column 24 to make the stirring arm 12 vibrate; the lower end of the stirring shaft 13 is connected with a rotary joint 26, and the air hammer 32 is connected to the rotary joint 26 through a vent pipe 27 provided in the stirring shaft 13. The air supply device supplies compressed air to the air hammer 32 through the rotary joint 26 and the vent pipe 27, which can drive the air hammer 32 to move. The air hammer 32 strikes the air hammer seat 25 or the column 24, which can make the stirring arm 12 vibrate, and the materials adhering to the column 24, the stirring arm 12 and the stirring shaft 13 can fall off. In order to scrape off the material adhered to the inner wall of the barrel 2, a scraper 28 is fixedly connected to the column 24. The scraper 28 is provided in multiple pieces and is respectively arranged on different columns. The scraper 28 is arranged in a staggered manner, that is, all the scrapers 28 are at different heights. In this way, the length of the scraper 28 can be shortened as much as possible. First, it can prevent stones in the material from getting stuck in the machine. The scraper 28 arranged in a staggered manner can still achieve a large area of ​​scraping off the adhered material on the inner wall of the barrel.

[0027] Reference Figure 6, the stirring arm 12 is arc-shaped; setting the stirring arm 12 to an arc shape can form an envelope stirring effect on the material, and the material in contact with the inner end of the stirring arm 12 will be ejected to move outward, that is, move toward the inner wall of the barrel 2, and the material in contact with the outer end of the stirring arm 12 will be ejected to move inward, that is, move toward the stirring shaft 13. On the one hand, the material will collide in the space enveloped by the stirring arm 12, thereby achieving a good mixing effect. On the other hand, it can also reduce the material from sticking to the inner wall of the barrel 2 and the stirring shaft 13.

[0028] Reference Figure 1 , Figure 2 and Figure 7 The working mode of the vertical mixer is as follows: the driving device is started to drive the outer ring of the slewing bearing to rotate, and the rotating outer ring drives the stirring shaft to rotate through the upper rotating bracket, so that the ash enters the dynamic feed pipe 17 through the fixed feed pipe 20, and the aggregate enters the feed channel 6 from the feed port 21, and water is supplied to the water spraying device through the water supply device; because the dynamic feed pipe 17 rotates with the stirring shaft, the aggregate entering the feed channel 6 will be scattered into the barrel in an annular shape under the action of the spiral blades on the dynamic feed pipe 17, and the ash will also be scattered into the barrel in an annular shape under the action of the material guide cover and the partition, so as to achieve uniform distribution of the ash and aggregate; the ash, aggregate and water will naturally fall and mix in the process of falling in the barrel, and coupled with the forced stirring and mixing of the stirring arm, the ash, aggregate and water will become a uniformly mixed stabilized soil and flow out from the discharge port at the bottom of the barrel. Since the stabilized soil mixed with ash, aggregate and water falls naturally by gravity, no driving force is needed, and the stirring shaft only needs to provide stirring force. Therefore, the vertical mixer provided by the present invention has a greatly reduced energy consumption compared with the horizontal mixer whose stirring shaft needs to provide both stirring force and driving force for outputting the stabilized soil. Taking the daily output of 600-800 cubic meters of stabilized soil as an example, a double-shaft horizontal mixer is used for production. Each stirring shaft of the double-shaft horizontal mixer needs to be driven by a 55-kilowatt motor, and the two motors have a total of 110 kilowatts; while the vertical mixer provided by the present invention is used for production, two 22-kilowatt motors are used to drive the stirring shaft to rotate, and the two motors have a total of 44 kilowatts. It can be seen that the energy-saving effect of the vertical mixer is very significant.

Claims

1. A vertical mixer, comprising a support (1), characterized in that: A barrel (2) is fixedly mounted on the support (1), and an open material discharge port (3) is provided at the bottom of the barrel (2). A bearing seat (4) is provided in the lower part of the barrel (2), and the bearing seat (4) is fixedly connected to the barrel (2) via a plurality of lower support arms (5) with spacer rings. A top plate (7) with a feed channel (6) provided at the center is fixedly mounted on the top of the barrel (2), and a slewing bearing (8) is connected to the top plate (7), the inner ring of which is fixedly connected to the top plate (7) and the outer ring of which is dynamically connected to a driving device mounted on the top plate. The outer ring of the slewing bearing (8) is An upper turntable (9) is fixedly connected, and a shaft seat (10) is provided in the upper part of the barrel (2). The shaft seat (10) is fixedly connected to the upper turntable (9) via a plurality of upper support arms (11) arranged in a ring at intervals. The upper turntable, the shaft seat and the upper support arms constitute an upper rotating bracket. A stirring shaft (13) connected to a plurality of stirring arms (12) is provided in the barrel (2). The upper end of the stirring shaft (13) is fixedly connected to the shaft seat (10), and the lower end is rotatably connected to the bearing seat (4) via a bearing. A water spraying device (14) for spraying water into the barrel (2) is provided on the inner wall of the ring feeding channel (6); The vertical mixer comprises a material distributor, the material distributor comprises a conical material guide cover (15) located above the stirring shaft (13) and capable of rotating with the stirring shaft (13), a plurality of spaced partitions (16) are arranged around the material guide cover (15), a material transfer channel is formed between adjacent partitions, a moving feed pipe (17) located in the feed channel (6) is connected to the top of the partition (16), the inner cavity of the moving feed pipe (17) is communicated with the material transfer channel, a plurality of spiral blades (18) are arranged on the outer wall of the moving feed pipe (17), a top cover (19) is arranged at the upper end of the feed channel (6), a fixed feed pipe (20) inserted into the moving feed pipe (17) is fixedly connected to the top cover (19), and a feed port (21) is arranged on the side wall of the top cover (19) or the feed channel (6); The stirring arms (12) are arranged in a plurality of groups at different heights along the stirring shaft (13), each group being composed of a plurality of stirring arms (12) arranged in a spaced ring; two groups of stirring arms (12) adjacent to each other are arranged at a staggered angle; The stirring arm (12) is arc-shaped, and the stirring arm is arranged in an arc shape so as to form an enveloping stirring effect on the material.

2. The vertical mixer according to claim 1, characterized in that: The number of the partitions (16) is the same as the number of the upper support arms (11) and their positions correspond one to one, so that the material transfer channels and the blanking gaps formed between adjacent upper support arms (11) are arranged in a one-to-one correspondence.

3. The vertical mixer according to claim 1, characterized in that: A lower turntable (22) is provided in the barrel (2) and is located above the bearing seat (4). The lower turntable (22) is fixedly connected to the stirring shaft (13) via a plurality of middle support arms (23) with spacer rings. A plurality of vertical columns (24) with spacer rings are provided between the lower turntable (22) and the upper turntable (9). The upper ends of the vertical columns (24) are connected to the upper turntable (9) and the lower ends are connected to the lower turntable (22). The outer ends of the stirring arms (12) are fixedly connected to the vertical columns (24) at corresponding positions.

4. The vertical mixer according to claim 3, characterized in that: The inner end of the stirring arm (12) is connected to the stirring shaft (13) in a plug-in manner.

5. The vertical mixer according to claim 3, characterized in that: The column (24) is fixedly connected to a pneumatic hammer seat (25), and a pneumatic hammer (32) is mounted on the pneumatic hammer seat (25). The pneumatic hammer (32) strikes the pneumatic hammer seat (25) or the column (24) to cause the stirring arm (12) to vibrate. The lower end of the stirring shaft (13) is connected to a rotary joint (26), and the pneumatic hammer (32) is connected to the rotary joint (26) via a vent pipe (27) provided in the stirring shaft (13).

6. The vertical mixer according to claim 3, characterized in that: A scraper (28) is fixedly connected to the column (24) and is capable of scraping off material adhered to the inner wall of the barrel (2).

7. The vertical mixer according to claim 1, characterized in that: A dust cover is provided above the bearing seat (4) to prevent materials from entering the bearing seat (4) and to rotate with the stirring shaft.

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