Mixer for premixing commercial concrete

Abstract

The invention provides a mixer for pre-mixing commercial concrete, and relates to the technical field of concrete mixing, the mixer comprises a bottom frame attached in a mixing barrel, a plurality of convergence pieces are mounted on the bottom frame, a top frame is mounted on the convergence pieces, a plurality of intermediate shafts are mounted between the top frame and the bottom frame, and the intermediate shafts are mounted on the bottom frame. A plurality of middle shafts are arranged on the bottom frame, each middle shaft is rotationally provided with two vibrating pieces, the other end of each vibrating piece is provided with a tail rod, connecting sleeves are arranged on the tail rods, a middle spring is arranged between the two connecting sleeves, and a diffusion frame is rotationally arranged in the bottom frame; the working mode of traditional concrete mixing is changed through innovative differential mixing, the system forms a unique internal and external reverse mixing force field through differential movement of convergence pieces and a diffusion frame, materials are gathered towards the center through anticlockwise rotation of the convergence pieces, the materials are diffused outwards through centrifugal force generated by the diffusion frame rotating at a high speed, and the mixing efficiency is improved. Due to the interaction, the stirring uniformity efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of concrete mixing technology, and more specifically, to a mixer for ready-mixed concrete. Background Technology

[0002] In the production of ready-mixed concrete, the uniformity of the mixing effect directly affects the quality and performance of the concrete. Currently, the mixing equipment commonly used in the industry has technical defects, mainly reflected in the unevenness of the mixing effect. Specifically, the mixing blades on the outer ring of the mixing drum have a larger rotation radius, which can generate stronger shearing force and mixing effect, thus resulting in better mixing effect. However, the mixing blades on the inner ring have a smaller rotation radius, which generates relatively weaker mechanical force, resulting in the concrete raw materials in the inner area not being fully mixed. This uneven mixing phenomenon seriously affects the quality of the final product.

[0003] Furthermore, existing mixing equipment generally adopts a rigid connection between the drive shaft and the mixing blade. This design poses a significant safety hazard. When the mixing blade gets stuck due to lumps of concrete or foreign objects during the mixing process, the motor will continue to output power due to the lack of buffering and protection mechanisms, causing the transmission system to bear excessive torque. This situation can not only lead to motor overload and burnout, but may also cause serious mechanical failures such as drive shaft breakage and mixing blade deformation. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a mixing machine for ready-mixed concrete to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a premixed concrete mixer, comprising a mixing drum; further comprising a differential mechanism, the differential mechanism comprising a bottom frame fitted inside the mixing drum, a plurality of converging plates mounted on the bottom frame, a top frame mounted on the plurality of converging plates, a plurality of intermediate shafts mounted between the top frame and the bottom frame, two vibrating plates rotatably mounted on each intermediate shaft, a tail rod mounted at the other end of each vibrating plate, a connecting sleeve mounted on the tail rod, and an intermediate spring mounted between two connecting sleeves, a diffuser rotatably mounted inside the bottom frame; further comprising a connecting mechanism, the connecting mechanism comprising an outer sleeve fixedly mounted inside the top frame, a transmission rod rotatably mounted inside the outer sleeve.

[0006] Preferably, the differential mechanism further includes a follower wheel mounted on the diffuser frame, with multiple intermediate wheels meshing inside the follower wheel, drive rods rotatably mounted inside the multiple intermediate wheels, and drive discs mounted on the multiple drive rods. The drive discs are fixedly connected to the top frame. This differential transmission structure achieves a speed superposition effect through the coordinated work of the follower wheel, intermediate wheels, and drive discs, ensuring the efficient operation of the mixing system and the stable power output.

[0007] Preferably, a protective sleeve is fixedly installed on the mixing tank, a drive shaft is rotatably installed inside the protective sleeve, a drive rod is coaxially connected to the drive shaft, a fixed wheel is fixedly installed on the protective sleeve, the drive shaft is rotatably connected to the drive shaft, and multiple intermediate wheels are respectively meshed on the fixed wheel. Through the all-round protection of the transmission system by the protective sleeve, combined with the precise meshing of the fixed wheel and the intermediate wheel, not only is the stability of the transmission guaranteed, but mechanical failures caused by the entry of foreign matter are also effectively prevented.

[0008] Preferably, the lower ends of the plurality of drive rods are fitted with a bonding disc, and the plurality of intermediate wheels are bonded to the bonding disc. This bonding design ensures the stability of the intermediate wheels when they are running at high speed by supporting and limiting the intermediate wheels through the bonding disc.

[0009] Preferably, a speed reducer is installed at the lower end of the mixing tank, the drive shaft is connected to the speed reducer, a motor is installed on the speed reducer, and a discharge port is installed on the mixing tank. Through the precise cooperation between the speed reducer and the motor, the speed control and power transmission are realized, and the design of the discharge port facilitates the rapid unloading of concrete.

[0010] Preferably, the connecting mechanism further includes multiple transverse tubes installed laterally within the outer sleeve, each transverse tube having a push rod slidably connected inside it, and the transmission rod having multiple vertical grooves, with the multiple push rods respectively abutting against the vertical grooves. This sliding connection structure, through the cooperation of the push rods and the vertical grooves, achieves power transmission while also providing overload protection.

[0011] Preferably, each of the top rods is equipped with multiple guide rods, and the inner wall of the transverse tube is provided with multiple guide grooves. The guide rods are slidably connected in the guide grooves. A tension spring is installed on the top rod and connected in the outer sleeve. Through the cooperation between the guide rods and the guide grooves, and in conjunction with the elastic action of the tension spring, the accuracy and reliability of the top rod movement are ensured.

[0012] Preferably, each of the transverse tubes has a through groove on the side near the outer sleeve, and the transverse tubes and the outer sleeve are filled with hydraulic oil. The multiple through grooves are respectively connected to the outer sleeve and the transverse tubes. This hydraulic transmission system achieves rapid response and smooth transition of overload protection by utilizing the incompressible characteristics of hydraulic oil.

[0013] Preferably, the outer sleeve is connected to multiple pressure tubes, each pressure tube has a sealing rod that slides inside, and a compression spring is installed on the sealing rod. An adjusting rod is threaded into the pressure tube, and the adjusting rod presses on the compression spring. By adjusting the preload of the compression spring with the adjusting rod, the overload protection threshold can be flexibly set, improving the adaptability of the equipment.

[0014] Preferably, external grooves are provided on the outer walls of the multiple pressurizing pipes. This structural design improves the convenience of adjusting the adjusting rod and enhances the maintainability and safety of the equipment by opening the external grooves.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a mixing machine for ready-mixed concrete, which has the following beneficial effects: The innovative differential mixing system changes the traditional working mode of concrete mixing. Through the differential motion of the converging plate and the diffuser, the system forms a unique internal and external reverse mixing force field. The counterclockwise rotation of the converging plate gathers the material towards the center, while the high-speed rotating diffuser generates centrifugal force to diffuse the material outward. This interaction significantly improves the uniformity and efficiency of mixing.

[0016] The dual vibration enhancement mechanism generates a multi-dimensional vibration effect during the mixing process through the combination of vibrating plates. The two vibrating plates are connected by an intermediate spring. When impacted by materials, they generate complex vibration patterns. This vibration can not only effectively break up clumps, but also promote the full mixing of various raw materials, thus improving the mixing quality.

[0017] The overload protection mechanism realizes the protection function of the equipment through the hydraulic oil transmission system. When the mixing system encounters resistance, the push rod will retract through hydraulic action, and the compression spring will deform to absorb the impact force, effectively preventing motor overload and mechanical damage. This design not only improves the safety of the equipment, but also extends its service life.

[0018] The adjustable overload protection system achieves precise adjustment of the overload force through the threaded engagement of the adjusting rod. Operators can easily change the preload of the compression spring according to different work requirements, thereby adapting to the needs of concrete mixing with different proportions and improving the adaptability and flexibility of the equipment.

[0019] Overall, this innovative concrete mixer, through multiple technological innovations such as differential mixing, enhanced vibration, and overload protection, not only solves the problems of uneven mixing and easy overload in traditional equipment, but also significantly improves the mixing quality and production efficiency of concrete. At the same time, the overload protection mechanism and adjustment function provide a safer and more reliable technical guarantee for ready-mixed concrete production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a premixed concrete mixer according to the present invention; Figure 2 In this invention Figure 1 A top-view structural diagram; Figure 3 This is a schematic diagram of the top frame and bottom frame in this invention; Figure 4 This is a schematic diagram of the drive disk and diffuser frame in this invention; Figure 5 This is a cross-sectional view of the drive disk and diffuser frame in this invention. Figure 6 This is an exploded structural diagram of the driving disk and follower wheel in this invention; Figure 7 This is a schematic diagram of the structure of the outer sleeve and the pressure tube in this invention; Figure 8 This is a cross-sectional view of the outer sleeve in this invention; Figure 9 This is a schematic diagram of the top rod in this invention.

[0021] In the diagram: 11. Mixing tank; 21. Bottom frame; 22. Converging plate; 23. Top frame; 24. Intermediate shaft; 25. Vibrating plate; 26. Tail rod; 27. Connecting sleeve; 28. Intermediate spring; 29. ​​Diffusion frame; 31. Outer sleeve; 32. Drive rod; 33. Horizontal tube; 34. Top rod; 35. Vertical groove; 36. Guide rod; 37. Guide groove; 38. Tension spring; 39. Through groove; 210. Follower wheel; 211. Intermediate wheel; 212. Drive rod; 213. Drive disc; 214. Protective sleeve; 215. Drive shaft; 216. Fixed wheel; 217. Adhesion disc; 218. Reducer; 219. Motor; 220. Discharge port; 310. Pressurization pipe; 311. Sealing rod; 312. Compression spring; 313. Adjusting rod; 314. Outer groove. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] Please see Figures 1 to 9 A premixed concrete mixer includes a mixing drum 11 and a differential mechanism. The differential mechanism includes a bottom frame 21 fitted inside the mixing drum 11, with multiple converging plates 22 mounted on the bottom frame 21. A top frame 23 is mounted on the multiple converging plates 22. Multiple intermediate shafts 24 are installed between the top frame 23 and the bottom frame 21. Two vibrating plates 25 are rotatably mounted on each intermediate shaft 24. A tail rod 26 is mounted at the other end of each vibrating plate 25. A connecting sleeve 27 is mounted on the tail rod 26, and an intermediate spring 28 is installed between the two connecting sleeves 27. A diffuser frame 29 is rotatably mounted inside the bottom frame 21. The differential mechanism also includes a follower wheel 210 mounted on the diffuser frame 29. Multiple intermediate wheels 211 are meshed inside the follower wheel 210, and a drive rod is rotatably mounted inside the multiple intermediate wheels 211. 212, multiple drive rods 212 are equipped with drive discs 213, drive discs 213 are fixedly connected to the top frame 23, a protective sleeve 214 is fixedly installed on the mixing tank 11, a drive shaft 215 is rotatably installed inside the protective sleeve 214, a drive rod 32 is coaxially connected to the drive shaft 215, a fixed wheel 216 is fixedly installed on the protective sleeve 214, the drive shaft 215 is rotatably connected to the drive shaft 215, multiple intermediate wheels 211 are respectively meshed with the fixed wheel 216, a bonding disc 217 is installed at the lower end of multiple drive rods 212, multiple intermediate wheels 211 are bonded to the bonding disc 217, a reducer 218 is installed at the lower end of the mixing tank 11, the drive shaft 215 is connected to the reducer 218, a motor 219 is installed on the reducer 218, and a discharge port 220 is installed on the mixing tank 11.

[0026] When premixing concrete raw materials, the raw materials are first placed into the mixing drum 11, and then the motor 219 is started. The reducer 218 drives the drive shaft 215 to rotate within the protective sleeve 214. Please refer to [link / reference needed]. Figure 3 This will cause the top frame 23 to rotate. Since the top frame 23 is connected to the drive disk 213, the drive disk 213 will rotate at the same angular velocity as the top frame 23 rotates. Please refer to [link to relevant documentation]. Figure 5 and Figure 6Since intermediate wheels 211 are rotatably mounted on the drive rod 212, and these intermediate wheels 211 mesh with fixed wheels 216 and follower wheels 210 respectively, the intermediate wheels 211 rotate at the same angular velocity as the drive disc 213. Furthermore, due to the meshing of multiple fixed wheels 216, they also rotate along the drive rod 212. Since multiple intermediate wheels 211 mesh with follower wheels 210 respectively, not only is the angular velocity of the drive shaft 215 transmitted to the follower wheels 210, but also the rotational speed of the intermediate wheels 211 is transmitted to the follower wheels 210. At this time, the speed of the follower wheels 210 is the superposition of these two speeds, making the angular velocity of the follower wheels 210 greater than the angular velocity of the drive shaft 215. Therefore, the rotational angular velocity of the diffuser frame 29 is greater than the rotational angular velocity of the convergent plate 22. Please refer to [link to relevant documentation]. Figure 3 When multiple converging plates 22 rotate counterclockwise, they will throw the concrete material towards the axis, causing the concrete material to move towards the axis. The diffuser 29 also rotates counterclockwise, but when the diffuser 29 rotates counterclockwise, it will throw the concrete material outward. The diffuser 29 rotates quickly, so it will generate a large outward throwing force. Therefore, the concrete material will impact the two vibrating plates 25 at the same time. Since the two vibrating plates 25 are connected by the intermediate spring 28, they will vibrate on both sides when impacted. Therefore, the concrete material will be fully premixed during rotation, thereby improving the mixing effect. After mixing is completed, it is discharged through the discharge port 220, thus completing the mixing process.

[0027] The connecting mechanism includes an outer sleeve 31 fixedly installed inside the top frame 23, with a transmission rod 32 rotatably installed inside the outer sleeve 31. The connecting mechanism also includes multiple transverse tubes 33 transversely installed inside the outer sleeve 31, with a top rod 34 slidably connected within each transverse tube 33. Multiple vertical grooves 35 are formed on the transmission rod 32, and the multiple top rods 34 abut against the vertical grooves 35. Multiple guide rods 36 are installed on each top rod 34. Multiple guide grooves 37 are formed on the inner wall of the transverse tubes 33, and the guide rods 36 are slidably connected within the guide grooves 37. A tension spring 38 is installed on each top rod 34. 38 is connected inside the outer sleeve 31. Each transverse tube 33 has a through groove 39 on the side near the outer sleeve 31. The transverse tube 33 and the outer sleeve 31 are filled with hydraulic oil. Multiple through grooves 39 are connected to the outer sleeve 31 and the transverse tube 33 respectively. Multiple pressure tubes 310 are connected and installed on the outer sleeve 31. Each pressure tube 310 has a sealing rod 311 that slides in a sealed manner. A compression spring 312 is installed on the sealing rod 311. An adjusting rod 313 is threaded inside the pressure tube 310. The adjusting rod 313 presses on the compression spring 312. External grooves 314 are opened on the outer walls of the multiple pressure tubes 310 respectively.

[0028] Please see Figure 7 , Figure 8 and Figure 9Since the drive rod 32 is mounted on the drive shaft 215, and the outer sleeve 31 is connected to the top frame 23, and the push rod 34 abuts against the vertical groove 35, the rotation of the drive rod 32 transmits power to the top frame 23, causing it to rotate, thus completing the power transmission process. When the top frame 23 is jammed, the resistance of the outer sleeve 31 increases, and the force between the push rod 34 and the vertical groove 35 increases. Because hydraulic oil is connected between the transverse pipe 33 and the outer sleeve 31 through the through groove 39, the push rod will retract backward. Since hydraulic oil is incompressible, it pushes the sealing rod 311 upward. At this time, the compression spring 312 is compressed, which will disengage the connection and prevent overload from burning out the motor 219. When it is necessary to change the overload force, since the adjusting rod 313 is threadedly connected inside the pressure tube 310, rotating the adjusting rod 313 will compress the compression spring 312, and the sealing rod 311 will be limited and pressed against the lower end of the pressure tube 310. Therefore, the compression of the compression spring 312 will be changed, thereby changing the overload force and completing the adjustment process.

[0029] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixer for ready-mixed concrete, comprising a mixing drum (11); characterized in that: It also includes a differential mechanism, which includes a bottom frame (21) fitted inside the mixing tank (11), a plurality of converging plates (22) mounted on the bottom frame (21), a top frame (23) mounted on the plurality of converging plates (22), a plurality of intermediate shafts (24) mounted between the top frame (23) and the bottom frame (21), two vibrating plates (25) rotatably mounted on each intermediate shaft (24), a tail rod (26) mounted on the other end of each vibrating plate (25), a connecting sleeve (27) mounted on the tail rod (26), and an intermediate spring (28) mounted between the two connecting sleeves (27), and a diffuser frame (29) rotatably mounted inside the bottom frame (21); it also includes a connecting mechanism, which includes an outer sleeve (31) fixedly mounted inside the top frame (23), and a transmission rod (32) rotatably mounted inside the outer sleeve (31).

2. The premixed concrete mixer according to claim 1, characterized in that: The differential mechanism also includes a follower wheel (210) mounted on the diffuser frame (29), a plurality of intermediate wheels (211) are meshed in the follower wheel (210), a drive rod (212) is rotatably mounted in the plurality of intermediate wheels (211), a drive disc (213) is mounted on the plurality of drive rods (212), and the drive disc (213) is fixedly connected to the top frame (23).

3. A premixed concrete mixer according to claim 2, characterized in that: A protective sleeve (214) is fixedly installed on the mixing tank (11). A drive shaft (215) is rotatably installed inside the protective sleeve (214). The drive rod (32) is coaxially connected to the drive shaft (215). A fixed wheel (216) is fixedly installed on the protective sleeve (214). The drive shaft (215) is rotatably connected to the drive shaft (215). A plurality of intermediate wheels (211) are respectively meshed on the fixed wheel (216).

4. A premixed concrete mixer according to claim 3, characterized in that: The lower ends of the plurality of drive rods (212) are fitted with a mating disc (217), and the plurality of intermediate wheels (211) are mated to the mating disc (217).

5. A premixed concrete mixer according to claim 3, characterized in that: A speed reducer (218) is installed at the lower end of the mixing tank (11), and the drive shaft (215) is connected to the speed reducer (218). A motor (219) is installed on the speed reducer (218), and a discharge port (220) is installed on the mixing tank (11).

6. A premixed concrete mixer according to claim 1, characterized in that: The connecting mechanism also includes a plurality of transverse tubes (33) installed transversely inside the outer sleeve (31), each of the transverse tubes (33) being slidably connected to a top rod (34), and the transmission rod (32) having a plurality of vertical grooves (35), the plurality of top rods (34) respectively abutting against the vertical grooves (35).

7. A premixed concrete mixer according to claim 6, characterized in that: Each of the top rods (34) is equipped with a plurality of guide rods (36), and a plurality of guide grooves (37) are provided on the inner wall of the transverse tube (33). The guide rods (36) are slidably connected in the guide grooves (37), and a tension spring (38) is installed on the top rod (34). The tension spring (38) is connected in the outer sleeve (31).

8. A premixed concrete mixer according to claim 7, characterized in that: Each of the transverse tubes (33) has a through groove (39) on the side near the outer sleeve (31). The transverse tubes (33) and the outer sleeve (31) are filled with hydraulic oil, and the multiple through grooves (39) are respectively connected to the outer sleeve (31) and the transverse tubes (33).

9. A premixed concrete mixer according to claim 8, characterized in that: Multiple pressure tubes (310) are connected and installed on the outer sleeve (31). Each pressure tube (310) has a sealing rod (311) that is sealed and slidable inside. A compression spring (312) is installed on the sealing rod (311). An adjusting rod (313) is threadedly connected inside the pressure tube (310). The adjusting rod (313) presses on the compression spring (312).

10. A premixed concrete mixer according to claim 9, characterized in that: External grooves (314) are respectively provided on the outer walls of the multiple pressurizing pipes (310).

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