Permeable concrete mixer with high mixing degree

Abstract

The utility model relates to a pervious concrete mixer with high mixing degree, which comprises a frame, a motor, three mixing shafts and a mixing chamber, the motor, the mixing shafts and the mixing chamber are arranged on the frame, and the three mixing shafts comprise a forward shaft and reverse shafts respectively positioned on two sides. The stirring chamber comprises a mixing area located between the forward shaft and the reverse shaft and a circulating area located on the other side, opposite to the forward shaft, of the reverse shaft, the stirring blades are spiral, the periphery of the forward shaft is provided with a plurality of sets of stirring blades which are axially arranged at equal intervals, and the periphery of the reverse shaft is provided with a plurality of sets of stirring blades which are arranged at intervals with the stirring blades of the forward shaft; the opposite transverse faces of the stirring blades, located in the mixing area, of the forward shaft and the reverse shaft are arranged in an overlapped mode, when the forward shaft rotates, the stirring blades of the forward shaft push concrete in the forward direction, and when the reverse shaft rotates, the stirring blades of the reverse shaft push the concrete in the reverse direction. By adopting the scheme, the utility model provides the high-mixing-degree pervious concrete mixer which ensures the water permeability of concrete by improving the mixing degree.

Description

Technical Field

[0001] The utility model relates to the field of engineering equipment, and particularly relates to a permeable concrete mixer with high mixing degree. Background Art

[0002] Permeable concrete, also known as porous concrete, sandless concrete or permeable floor, is a porous lightweight concrete prepared by mixing aggregate, cement and a strengthening agent in a certain proportion. Its structural feature lies in that a thin layer of cement paste coats the surface of the coarse aggregate and bonds with each other to form a honeycomb structure with uniformly distributed holes.

[0003] Permeable concrete is generally prepared by a mixer. The traditional mixer includes a frame, a mixing chamber fixed to the frame and a motor. The motor drives a mixing shaft extending into the mixing chamber. Mixing blades are arranged on the outer periphery of the mixing shaft in the mixing chamber. When preparing permeable concrete, the raw materials are often put into the mixing chamber from the feeding port above the mixing chamber, and the motor is started, and the raw materials are continuously stirred by the mixing blades.

[0004] However, during the preparation process of permeable concrete, the existing mixing blade structure is relatively single, and the situation that local concrete has not been stirred all the time is likely to occur, which further leads to poor mixing degree and affects the water permeability of permeable concrete. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a permeable concrete mixer with high mixing degree, which ensures the water permeability of concrete by improving the mixing degree.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: including a frame, a motor, a mixing shaft and a mixing chamber arranged on the frame. The mixing shaft is rotationally matched with the longitudinal two ends of the mixing chamber. A part of the mixing shaft is located in the mixing chamber and is provided with mixing blades. The part of the mixing shaft outside the mixing chamber is linked with the motor and rotates under the drive of the motor. Its characteristics are as follows: the number of the mixing shafts is three, including a forward shaft located in the middle of the transverse direction and reverse shafts respectively located on the transverse two sides of the forward shaft. The mixing chamber includes a mixing area located between the forward shaft and the reverse shafts and a circulation area located on the other side of the reverse shaft relative to the forward shaft. The mixing blades are spiral. Multiple groups of mixing blades are arranged on the outer periphery of the forward shaft at equal axial intervals. Multiple groups of mixing blades are arranged on the outer periphery of the reverse shaft at intervals with the mixing blades of the forward shaft. The mixing blades of the forward shaft and the reverse shaft located in the mixing area are arranged overlappingly relative to the transverse plane. When the forward shaft rotates, the mixing blades of the forward shaft push the concrete forward. When the reverse shaft rotates, the mixing blades of the reverse shaft push the concrete backward.

[0007] By adopting the above technical solutions, there are mainly two mixing methods. ① Impact mixing: In the mixing area, the concrete pushed forward by the stirring blades of the forward shaft will impact with the concrete pushed backward by the stirring blades of the reverse shaft and then be fully mixed. After the impact, part of the concrete continues to be pushed forward, and part turns into the circulation area. ② Circulation mixing: The concrete located in the circulation area is pushed backward by the stirring blades of the reverse shaft. After reaching the axial end of the mixing chamber, it turns towards the middle. The concrete on both sides is fully mixed after the impact, and after mixing, it gathers and enters the mixing area. To sum up, the two mixing methods intersect with each other, making the movement path of the concrete more complex and diverse during the movement process, so that the mixing is more sufficient, and thus the water permeability of the permeable concrete is ensured.

[0008] The present utility model is further arranged as follows: The transverse cross-section of the mixing chamber is rectangular and the corners at both sides of the bottom are rounded, and the horizontal cross-section of the mixing chamber is rectangular and the corners around are rounded.

[0009] By adopting the above technical solutions, the corners of the transverse cross-section of the mixing chamber are rounded, making the gap between it and the stirring blades of the reverse shaft smaller, so that more concrete participates in the stirring; while the horizontal cross-section of the mixing chamber is rounded, in order to guide the concrete at the axial end of the circulation area to turn towards the center for mixing, making the turning smoother, thus ensuring the mixing degree.

[0010] The present utility model is further arranged as follows: A plurality of stirring holes are provided on the stirring blades of the forward shaft and the stirring blades of the reverse shaft.

[0011] By adopting the above technical solutions, the stirring holes on each stirring blade enable the concrete to locally pass through the stirring blade and then simulate the stirring, adding a stirring structure with a comprehensive distribution and continuous operation, thereby improving the mixing degree.

[0012] The present utility model is further arranged as follows: The stirring hole includes a cylindrical section in the middle and frustum sections at both axial ends of the cylindrical section, and the diameter gradually expands as it moves away from the cylindrical section.

[0013] By adopting the above technical solutions, the frustum section with a gradually expanding diameter can guide more concrete to pass through the stirring hole for stirring. Since more concrete floods into the frustum section than the concrete located in the cylindrical section, a more sufficient impact force is formed to flush out the concrete that enters the stirring hole first, improving the mixing efficiency and also preventing the concrete from blocking the stirring hole.

[0014] The present utility model is further arranged as follows: The motor is coaxially driven with the forward shaft to be provided with a motor shaft. A coupling is provided between the motor shaft and the forward shaft to form a linkage and cooperation between the two. A driving gear is provided on the part of the forward shaft outside the mixing chamber, and a driven gear meshing with the driving gear is provided on the part of the reverse shaft outside the mixing chamber.

[0015] By adopting the above technical solution, when the motor drives the forward shaft to rotate, the forward shaft drives the reverse shafts on both sides to rotate synchronously in the reverse direction through the driving gear - reverse gear, which simplifies the number of driving sources while ensuring the synchronism of the circulating area flow and also guarantees the mixing degree.

[0016] The present utility model is further configured as: the diameter of the driving gear is smaller than that of the driven gear.

[0017] By adopting the above technical solution, the concrete at the center of the axial end of the mixing chamber is mixed by the concrete in the circulating areas on both sides. By making the specification of the driving gear smaller than that of the driven gear, the rotation speed of the forward shaft is greater than that of the reverse shaft, so that the mixed concrete can quickly pass through the mixing area for transfer, ensuring the uniformity of subsequent mixing. Similarly, after the concrete reaches the center at the other end of the mixing area, it can also quickly be distributed to both sides for new mixing, thereby improving the mixing degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the specific embodiment of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged view of A in

[0020] Figure 3 is a concrete flow direction diagram. SPECIFIC EMBODIMENTS

[0021] Next, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] Such as Figure 1 — Figure 3As shown in the figure, the utility model discloses a permeable concrete mixer with a high mixing degree, which includes a frame 1, a motor 2, a stirring shaft and a stirring chamber 3 arranged on the frame 1. The stirring shaft is rotationally matched with the longitudinal two ends of the stirring chamber 3. A part of the stirring shaft is located inside the stirring chamber 3 and is provided with stirring blades 6. The part of the stirring shaft located outside the stirring chamber 3 is linked with the motor 2 and rotates under the drive of the motor 2. The number of stirring shafts is three, including a forward shaft 4 located in the middle in the transverse direction and reverse shafts 5 respectively located on the two transverse sides of the forward shaft 4. The stirring chamber 3 includes a mixing area a located between the forward shaft 4 and the reverse shafts 5 and a circulation area b located on the other side of the reverse shafts 5 relative to the forward shaft 4. The stirring blades 6 are spiral. Multiple groups of stirring blades 6 are axially arranged at equal intervals on the outer periphery of the forward shaft 4. Multiple groups of stirring blades 6 are arranged at intervals with the stirring blades 6 of the forward shaft 4 on the outer periphery of the reverse shaft 5. The stirring blades 6 of the forward shaft 4 and the reverse shafts 5 located in the mixing area a are arranged in an overlapping manner relative to the transverse plane. When the forward shaft 4 rotates, the stirring blades 6 of the forward shaft 4 push the concrete forward, and when the reverse shaft 5 rotates, the stirring blades 6 of the reverse shaft 5 push the concrete backward, as Figure 3 shown, there are mainly two mixing methods. ① Impact mixing. In the mixing area a, the concrete pushed forward by the stirring blades 6 of the forward shaft 4 will collide with the concrete pushed backward by the stirring blades 6 of the reverse shaft 5 and then be fully mixed. After the impact, part of the concrete continues to be pushed forward (e flow), and part turns to enter the circulation area b (f flow). ② Circulation mixing. The concrete located in the circulation area b is pushed backward by the stirring blades 6 of the reverse shaft 5 (g flow), turns to the middle after reaching the axial end of the stirring chamber 3 (h flow), and the concrete on both sides is fully mixed after the collision. After mixing, it gathers and enters the mixing area a. To sum up, the two mixing methods cross each other, making the movement path of the concrete more complex and diverse during the movement process, so that the mixing is more sufficient, and further ensuring the water permeability of the permeable concrete.

[0024] The transverse cross-section of the stirring chamber 3 is rectangular and the corners at the bottom on both sides (at c) are rounded. The horizontal cross-section of the stirring chamber 3 is rectangular and the corners around (at d) are rounded. The corners of the transverse cross-section of the stirring chamber 3 are rounded, making the gap between it and the stirring blades 6 of the reverse shaft 5 smaller, enabling more concrete to participate in the stirring; while the horizontal cross-section of the stirring chamber 3 is rounded, in order to guide the concrete at the axial end of the circulation area b to turn towards the center for mixing, making the turning smoother, thus ensuring the mixing degree.

[0025] Multiple stirring holes 61 are arranged on the stirring blades 6 of the forward shaft 4 and the stirring blades 6 of the reverse shaft 5. The stirring holes 61 of each stirring blade 6 enable the concrete to partially pass through the stirring blade 6 and simulate stirring, adding a stirring structure with a comprehensive distribution and continuous operation, thereby improving the mixing degree.

[0026] The stirring hole 61 includes a cylindrical section 611 located in the middle and frustum sections 612 located at both axial ends of the cylindrical section 611 and gradually expanding in diameter as they move away from the cylindrical section 611. The frustum sections 612 with gradually expanding diameters can guide more concrete to pass through the stirring hole 61 for stirring. Since more concrete floods into the frustum sections 612 than the cylindrical section 611, a more sufficient impact force is formed to flush out the concrete that first enters the stirring hole 61, improving the mixing efficiency and also preventing the stirring hole 61 from being blocked by the concrete.

[0027] The motor 2 is coaxially driven with the forward shaft 4 to be provided with a motor shaft 21. A coupling 22 that constitutes the linkage and cooperation between the motor shaft 21 and the forward shaft 4 is provided between the motor shaft 21 and the forward shaft 4. A driving gear 41 is provided on the part of the forward shaft 4 outside the stirring chamber 3, and a driven gear 51 that meshes and drives with the driving gear 41 is provided on the part of the reverse shaft 5 outside the stirring chamber 3. When the motor 2 drives the forward shaft 4 to rotate, the forward shaft 4 drives the reverse shafts 5 on both sides to rotate synchronously and reversely through the driving gear 41 - driven gear 51. While simplifying the number of driving sources, the synchronism of the flow in the circulation area b also ensures the mixing degree.

[0028] The diameter of the driving gear 41 is smaller than that of the driven gear 51. The concrete at the center of the axial end of the stirring chamber 3 is mixed by the concrete in the circulation areas b on both sides. By making the specification of the driving gear 41 smaller than that of the driven gear 51, the rotation speed of the forward shaft 4 is greater than that of the reverse shaft 5, so that the mixed concrete can quickly pass through the mixing area a for transfer, ensuring the uniformity of subsequent mixing. Similarly, after the concrete reaches the center at the other end of the mixing area a, it can also be quickly distributed to both sides for new mixing, thereby improving the mixing degree.

Claims

1. A high-mixing permeable concrete mixer, comprising a frame and a motor, a stirring shaft and a stirring chamber arranged on the frame, wherein the stirring shaft is rotationally matched with both ends of the stirring chamber in the longitudinal direction, the stirring shaft is partially located in the stirring chamber and is provided with stirring blades, and the portion of the stirring shaft located outside the stirring chamber is linked with the motor and rotates under the drive of the motor, characterized in that: The number of the stirring shafts is three, including a forward shaft located in the middle transversely and reverse shafts respectively located on both transverse sides of the forward shaft. The stirring chamber includes a mixing area located between the forward shaft and the reverse shafts and a circulation area located on the other side of the reverse shafts relative to the forward shaft. The stirring blades are spiral. Multiple groups of stirring blades are arranged axially and equidistantly on the outer periphery of the forward shaft. Multiple groups of stirring blades are arranged on the outer periphery of the reverse shafts at intervals with the stirring blades of the forward shaft. The stirring blades of the forward shaft and the reverse shafts located in the mixing area are arranged overlappingly relative to the transverse plane. When the forward shaft rotates, the stirring blades of the forward shaft push the concrete forward. When the reverse shaft rotates, the stirring blades of the reverse shaft push the concrete backward.

2. The highly mixed permeable concrete mixer according to claim 1, characterized in that: The transverse section of the stirring chamber is rectangular and the corners at both sides of the bottom are rounded. The horizontal section of the stirring chamber is rectangular and the corners around are rounded.

3. The highly hybrid permeable concrete mixer according to claim 1, characterized in that: Multiple stirring holes are provided on the stirring blades of the forward shaft and the stirring blades of the reverse shaft.

4. The highly mixed permeable concrete mixer according to claim 3, characterized in that: The stirring holes include a cylindrical section located in the middle and frustum sections located at both axial ends of the cylindrical section and gradually expanding in diameter as they are away from the cylindrical section.

5. The highly mixed permeable concrete mixer according to claim 1, characterized in that: The motor is coaxially driven with the forward shaft to be provided with a motor shaft. A coupling for forming the linkage cooperation between the motor shaft and the forward shaft is provided between the motor shaft and the forward shaft. A driving gear is provided on the part of the forward shaft located outside the stirring chamber. A driven gear meshing and driving with the driving gear is provided on the part of the reverse shaft located outside the stirring chamber.

6. The highly mixed permeable concrete mixer according to claim 5, characterized in that: The diameter of the driving gear is smaller than the diameter of the driven gear.

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