Concrete stirring device

Abstract

The utility model relates to a concrete stirring device which effectively solves the problems of precipitation and lower stirring efficiency of stirring equipment. According to the technical scheme, the device comprises a shell, a protrusion is arranged in the center of the bottom of the shell, and the inner wall of the shell is in arc transition towards the protrusion; a rotating shaft is mounted at the axis of the shell, an upper stirring unit and a lower stirring unit are mounted on the rotating shaft, each stirring unit comprises a plurality of stirring blade groups which are circumferentially and uniformly distributed, each stirring blade group comprises a first blade and a second blade, the inner end of each first blade is mounted on the rotating shaft, and the inner end of each second blade is mounted at the outer end of the corresponding first blade; included angles are formed between the first blades and the horizontal plane and between the second blades and the horizontal plane, the inclination directions of the first blades and the second blades in the same group are opposite, the inclination directions of the upper first blades and the lower first blades are opposite, and the inclination directions of the upper second blades and the lower second blades are opposite; according to the utility model, sediment caused by incapability of stirring material flow at the bottom of the shell can be avoided, and the stirring efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of mixing equipment, in particular to a concrete mixing device. Background Art

[0002] In building construction, it is necessary to mix cement, stones, sand and water evenly into concrete for pouring. During the mixing process, due to insufficient mixing at the bottom, materials with larger specific gravity such as sand and stones will partially settle at the bottom of the equipment. Moreover, since the mixing blades are relatively simply arranged, the stirring direction of the materials is relatively single, and the mixing efficiency is low.

[0003] For example, in the utility model patent with the application number: CN202021347653.4, by arranging blades that fit the bottom of the tank body to scrape the bottom of the tank body, precipitation is avoided. However, since the blades are in direct contact with the tank body, the running resistance is large, and the tank body and the blades wear quickly, especially in the case of sand and stone materials, the wear is more serious, and it is easier to have the situation of material jamming and tooth breakage during rotation. Summary of the Invention

[0004] The utility model provides a concrete mixing device, aiming to solve the problems of precipitation in the mixing equipment and low mixing efficiency.

[0005] The technical solution it adopts includes a housing. A protrusion is provided at the center of the bottom of the housing, and the inner wall of the housing transitions to the protrusion in an arc shape; a rotating shaft is installed at the axis of the housing, and two sets of mixing units are installed on the rotating shaft. Each set of mixing units includes several groups of mixing blade groups evenly distributed in a circumferential manner. Each group of mixing blade groups includes a first blade and a second blade. The inner end of the first blade is installed on the rotating shaft, and the inner end of the second blade is installed at the outer end of the first blade. Both the first blade and the second blade have an angle with the horizontal plane, and the inclination directions of the first blade and the second blade in the same group are opposite, and the inclination directions of the first blades of the upper mixing unit and the lower mixing unit are opposite, and the inclination directions of the second blades of the upper mixing unit and the lower mixing unit are opposite.

[0006] The lower part of the rotating shaft extends out of the housing, and a driving motor is installed on the outer wall of the housing. The driving motor drives the rotating shaft to rotate through a belt mechanism.

[0007] A sealing ring is installed between the rotating shaft and the housing.

[0008] The inner end of the first blade is provided with a first connecting column, and the outer end is provided with a second connecting column. The first connecting column connects the first blade to the rotating shaft, and the second connecting column connects the first blade and the second blade.

[0009] The outer ends of the first connecting posts and both ends of the second connecting posts are provided with inclined card slots. The direction of the card slots is the same as the inclination of the corresponding blades. The ends of the blades are stuck in the card slots and fixed by tightening with bolts.

[0010] With the wall-attached circulating liquid flow, the utility model can avoid the formation of precipitation due to the failure to stir the materials at the bottom of the shell, improving the stirring efficiency. Moreover, it will not increase the resistance and wear rate, and it is not easy to have accidents such as material jamming and tooth breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view sectional view of the utility model.

[0012] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0013] Figure 3 It is the three-dimensional view of the stirring unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Combined with the drawings, the utility model includes a shell 1. A protrusion is provided at the center of the bottom of the shell 1. The inner wall of the shell 1 transitions to the protrusion in an arc shape, so that the inner bottom surface of the shell 1 forms an arc surface formed by a circular arc cross-section rotating around the axis of the shell 1 for one week. A rotating shaft 2 is installed at the axis of the shell 1. Two sets of stirring units are installed on the rotating shaft 2. Each set of stirring units includes several groups of stirring blade groups evenly distributed in the circumferential direction. Each group of stirring blade groups includes a first blade 3 and a second blade 4. The inner end of the first blade 3 is installed on the rotating shaft 2, and the inner end of the second blade 4 is installed at the outer end of the first blade 3. Both the first blade 3 and the second blade 4 have an angle with the horizontal plane, and the inclination directions of the first blade 3 and the second blade 4 in the same group are opposite. Moreover, the inclination directions of the first blades 3 of the upper stirring unit and the lower stirring unit are opposite, and the inclination directions of the second blades 4 of the upper stirring unit and the lower stirring unit are opposite. When the rotating shaft 2 rotates, the first blade 3 of the lower stirring unit exerts an upward component force on the material, the second blade 4 exerts a downward component force on the material, the first blade 3 of the upper stirring unit exerts a downward component force on the material, and the second blade 4 of the upper part exerts an upward component force on the material. The first blade 3 and the second blade 4 will promote the circulation of the material in the vertical plane.

[0015] The lower part of the rotating shaft 2 extends out of the shell 1. A driving motor 5 is installed on the outer wall of the shell 1. The driving motor 5 drives the rotating shaft 2 to rotate through a belt mechanism 6.

[0016] A sealing ring 7 is installed between the rotating shaft 2 and the shell 1 to prevent the leakage of materials from the fitting gap between the rotating shaft 2 and the shell 1.

[0017] The inner end of the first blade 3 is provided with a first connecting column 8, and the outer end is provided with a second connecting column 9. The first connecting column 8 connects the first blade 3 to the rotating shaft 2, and the second connecting column 9 connects the first blade 3 and the second blade 4.

[0018] The outer end of the first connecting column 8 and both ends of the second connecting column 9 are provided with inclined card slots 10. The direction of the card slots 10 is the same as the diagonal direction of the corresponding blade. The end of the blade is stuck in the card slot 10 and fixed by tightening with bolts 11, so as to realize the detachable installation of the first blade 3 and the second blade 4, enabling the blades to be repaired and replaced separately.

[0019] When the utility model is stirring, the driving motor 5 drives the rotating shaft 2 to rotate through the belt mechanism 6. The blades on the rotating shaft 2 stir the material flow. The second blade 4 of the lower stirring unit exerts a downward component force on the material, and the first blade 3 exerts an upward component force on the material. Then, below the lower stirring unit, a liquid flow flowing from the outside of the housing 1 along the arc-shaped bottom surface towards the center of the housing 1 will be formed. The liquid flow can prevent the material from precipitating at the bottom of the housing 1. At the same time, the first blade 3 of the upper stirring unit will exert a downward component force on the material, and the second blade 4 will exert an upward component force on the material. Then, in the area between the two stirring units, the upper and lower first blades 3 will push the material towards the area between the two stirring units, and the upper and lower second blades 4 will separate the material between the two stirring units towards the upper and lower sides. In this way, the material inside the two stirring units will be supplemented towards the outside, and a liquid flow with both internal and external circulation and up and down circulation will be formed inside the housing 1, as Figure 1 shown by the arrows, thereby accelerating the mixing efficiency of the material flow inside the housing 1.

[0020] Through the design of the arc-shaped bottom surface of the housing 1 and the wall-attached circulating liquid flow of the material at the bottom of the housing 1, the utility model can prevent the material flow at the bottom of the housing 1 from not being stirred and forming precipitation. Moreover, through the blade design of the two stirring units, a liquid flow with both internal and external circulation and up and down circulation can be formed inside the housing 1, improving the stirring efficiency. Moreover, the blades do not directly contact the housing 1, will not increase the resistance and wear rate, and are not prone to accidents such as material jamming and tooth breakage.

Claims

1. A concrete mixing device, comprising a housing (1), characterized in that: A protrusion is provided at the center of the bottom of the shell (1), and the inner wall of the shell (1) transitions to the protrusion in an arc; a rotating shaft (2) is installed at the axis of the shell (1), and two groups of stirring units are installed on the rotating shaft (2), each stirring unit group includes a plurality of stirring blade groups evenly distributed around the circumference, each stirring blade group includes a first blade (3) and a second blade (4), the inner end of the first blade (3) is installed on the rotating shaft (2), and the inner end of the second blade (4) is installed on the outer end of the first blade (3), the first blade (3) and the second blade (4) both have an angle with the horizontal plane, and the first blade (3) and the second blade (4) of the same group are inclined in opposite directions, and the first blade (3) of the upper stirring unit is inclined in opposite directions to the first blade (3) of the lower stirring unit, and the second blade (4) of the upper stirring unit is inclined in opposite directions to the second blade (4) of the lower stirring unit; The lower part of the rotating shaft (2) extends out of the housing (1), and a driving motor (5) is mounted on the outer wall of the housing (1). The driving motor (5) drives the rotating shaft (2) to rotate via a belt mechanism (6).

2. A concrete mixing device according to claim 1, characterized in that: A sealing ring (7) is installed between the rotating shaft (2) and the housing (1).

3. A concrete mixing device according to claim 1, characterized in that: The first blade (3) is provided with a first connecting column (8) at its inner end and a second connecting column (9) at its outer end; the first connecting column (8) connects the first blade (3) to the rotating shaft (2), and the second connecting column (9) connects the first blade (3) to the second blade (4).

4. A concrete mixing device according to claim 3, characterized in that: The outer end of the first connecting column (8) and both ends of the second connecting column (9) are provided with inclined slots (10), the direction of the slots (10) is consistent with the oblique direction of the corresponding blades, and the ends of the blades are clamped in the slots (10) and are tightened and fixed by bolts (11).

Images