Coaxial different-speed stirrer

Abstract

According to the coaxial different-speed stirrer disclosed by the utility model, the stock bin is arranged on the rack, the stirring space is formed in the stock bin, and the discharging hopper for discharging materials into the stock bin is arranged at the feeding end of the stock bin; the stirring mechanism comprises an outer stirring pipe and an inner stirring pipe, a rotating bearing is fixedly arranged at the part, in contact with the outer circumferential surface of the inner stirring pipe, of the inner circumferential surface of the outer stirring pipe, and the ends, far away from each other, of the outer stirring pipe and the inner stirring pipe are arranged outside the stock bin; a double-output-shaft motor for driving the outer stirring pipe and the inner stirring pipe to rotate is arranged at the bottom of the rack; and two power output shafts of the double-output-shaft motor are in transmission connection with the outer peripheral surfaces of the end parts of the outer stirring pipe and the inner stirring pipe. Through the outer stirring pipe and the inner stirring pipe, materials can be stirred in a stirring space in an omnibearing and multi-layer mode, the uniformity and high efficiency of material mixing are ensured, and compared with an existing single-shaft same-speed stirring mechanism, the stirring effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of material mixing equipment, in particular to a coaxial different-speed mixer. Background Technique

[0002] The mixing of mortar putty is an important link to ensure the construction quality. Traditional mixing methods often rely on single-axis mixing equipment. Although these equipment can meet certain mixing requirements at the basic level, their limitations gradually emerge when facing the higher requirements of modern architecture for material uniformity, fineness and working efficiency. The design of a single-axis mixer focuses on driving the mixing blades to rotate through a fixed rotating shaft to achieve the mixing of materials.

[0003] However, this mixing mode has several significant disadvantages. First, due to the relatively single movement track of the mixing shaft, it is easy to cause mixing blind spots of materials in the mixing barrel. Especially in the bottom and edge areas of the mixing barrel, the materials may not be fully turned and mixed, thus affecting the uniformity of mortar putty. Secondly, the single-axis mixing method may not be efficient enough in energy transfer. Especially in the initial stage of mixing, the materials are in a relatively loose state, and the mixing shaft needs to consume a large amount of energy to overcome the friction between the materials to gradually bring the materials into the mixing state. This not only increases the energy consumption, but also may lead to a decrease in mixing efficiency due to insufficient mixing force;

[0004] Furthermore, for mortar putty that requires fine mixing, the single-axis mixing method may not provide enough shear force and dispersion force, making it difficult for the particles in the materials to reach the ideal refinement effect, thus affecting the fineness and service performance of the final product; Therefore, we have carried out technical improvements on the equipment in the factory area to meet the use requirements. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a coaxial different-speed mixer with reasonable structure design and good mixing effect in view of the deficiencies of the prior art.

[0006] The technical problem to be solved by the utility model is realized through the following technical solutions. A coaxial different-speed mixer includes a frame, and is provided with;

[0007] A feed bin, the upper end of the feed bin is the feed end and the lower end is the discharge end. A mixing space is formed inside the feed bin, and a feed hopper for feeding materials into the feed bin is arranged at the feed end of the feed bin;

[0008] Stirring mechanism, the stirring mechanism includes an outer stirring tube and an inner stirring tube arranged in the stirring space. The outer stirring tube is concentrically sleeved on the outer peripheral surface of the inner stirring tube. A rotary bearing is fixedly arranged at the part where the inner peripheral surface of the outer stirring tube contacts the outer peripheral surface of the inner stirring tube. The relatively far ends of the outer stirring tube and the inner stirring tube are respectively placed outside the silo. At the bottom of the frame, a double-output shaft motor for driving the outer stirring tube and the inner stirring tube to rotate is arranged. The two power output shafts of the double-output shaft motor are in transmission connection with the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube. Pulley wheels are fixedly arranged on the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube extending out of the silo. The pulley wheels are in belt transmission connection with the two power output shafts of the double-output shaft motor.

[0009] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the coaxial different-speed mixer described above, the outer diameters of the pulley wheels on the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube are different, and the outer diameter of the pulley wheel on the outer peripheral surface of the end of the outer stirring tube is larger than the outer diameter of the pulley wheel on the outer peripheral surface of the end of the inner stirring tube.

[0010] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the coaxial different-speed mixer described above, an upper stirring area for accommodating the outer stirring tube and the inner stirring tube is formed in the upper part of the stirring space of the silo, and a lower discharging area is formed in the lower part of the stirring space. The height of the lower discharging area is lower than the height of the upper stirring area.

[0011] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the coaxial different-speed mixer described above, a plurality of stirring teeth for stirring the materials in the stirring space are fixedly arranged on the outer peripheral surfaces of the outer stirring tube and the inner stirring tube.

[0012] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the coaxial different-speed mixer described above, oil seals are arranged at the front and rear end faces of the rotary bearing between the outer stirring tube and the inner stirring tube.

[0013] Compared with the prior art, the beneficial technical effects of the present utility model are: through the outer stirring tube and the inner stirring tube, the materials can be stirred in all directions and at multiple levels in the stirring space. Moreover, the outer diameter of the pulley wheel on the outer peripheral surface of the end of the outer stirring tube is larger than the outer diameter of the pulley wheel on the outer peripheral surface of the end of the inner stirring tube, and the outer diameter of the outer stirring tube is larger than the outer diameter of the inner stirring tube, resulting in the linear velocity of the outer stirring tube being greater than the linear velocity of the inner stirring tube, achieving coaxial different speeds and ensuring the uniformity and high efficiency of the material mixing, and having a better stirring effect compared with the existing single-axis same-speed stirring mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present utility model.

[0015] In the figure, 1 is the frame; 2 is the silo; 3 is the feeding end; 4 is the discharging end; 5 is the outer stirring tube; 6 is the inner stirring tube; 7 is the stirring teeth; 8 is the rotary bearing; 9 is the double-output shaft motor; 10 is the pulley; 11 is the belt; 12 is the feeding hopper. Specific embodiments

[0016] The following further describes the specific technical solutions of the present invention with reference to the accompanying drawings, so as to facilitate those skilled in the art to further understand the present invention without limiting its rights.

[0017] Example 1, referring to Figure 1 , a coaxial different-speed mixer, including a frame 1, which is provided on the frame 1;

[0018] A silo 2, the shape and size of the silo 2 can be selected according to the use requirements. The upper end of the silo 2 is the feeding end 3, and the lower end is the discharging end 4. A stirring space is formed inside the silo 2. A feeding hopper 12 for feeding materials into the silo 2 is provided at the feeding end 3 of the silo 2; a stirring mechanism, the stirring mechanism includes an outer stirring tube 5 and an inner stirring tube 6 arranged in the stirring space. The outer stirring tube 5 and the inner stirring tube 6 can be steel pipes. The outer stirring tube 5 is concentrically sleeved on the outer peripheral surface of the inner stirring tube 6. A rotary bearing 8 is fixedly arranged at the part where the inner peripheral surface of the outer stirring tube 5 contacts the outer peripheral surface of the inner stirring tube 6. Oil seals are arranged at the front and rear end faces of the rotary bearing between the outer stirring tube 5 and the inner stirring tube 6. The ends of the outer stirring tube 5 and the inner stirring tube 6 that are far apart are respectively placed outside the silo 2. A double-output shaft motor 9 for driving the rotation of the outer stirring tube 5 and the inner stirring tube 6 is arranged at the bottom of the frame 1. The two power output shafts of the double-output shaft motor 9 are in transmission connection with the outer peripheral surfaces of the ends of the outer stirring tube 5 and the inner stirring tube 6. Pulley 10 is fixedly arranged on the outer peripheral surfaces of the ends of the outer stirring tube 5 and the inner stirring tube 6 extending out of the silo 2. The pulley 10 is in transmission connection with the two power output shafts of the double-output shaft motor 9 through a belt 11. The upper stirring area for accommodating the outer stirring tube 5 and the inner stirring tube 6 is formed in the upper part of the stirring space of the silo 2, and the lower discharging area is formed in the lower part of the stirring space. The height of the lower discharging area is lower than the height of the upper stirring area; A plurality of stirring teeth 7 for stirring the materials in the stirring space are fixedly arranged on the outer peripheral surfaces of the outer stirring tube 5 and the inner stirring tube 6;

[0019] In addition, the outer diameter of the pulley on the outer peripheral surface of the end of the outer stirring tube 5 is larger than the outer diameter of the pulley on the outer peripheral surface of the end of the inner stirring tube 6, and the outer diameter of the outer stirring tube 5 is larger than the outer diameter of the inner stirring tube 6, so that the linear velocity of the outer stirring tube 5 is greater than the linear velocity of the inner stirring tube 6, realizing coaxial different speeds. The sizes of the stirring teeth 7 on the outer peripheral surfaces of the outer stirring tube 5 and the inner stirring tube 6 are different and can be selected according to the use requirements;

[0020] Principle of different speeds I: The outer diameters of the pulleys on the output shafts at both ends of the double-output shaft motor are the same, while the outer diameters of the pulleys on the outer stirring tube and the inner stirring tube are different. The outer diameter of the former pulley is smaller than that of the latter pulley, thus achieving the same axis but different angular velocities (same axis, different speeds).

[0021] Principle of different speeds II: The stirring teeth welded on the outer peripheral surface of the outer stirring tube are short stirring teeth, while the stirring teeth on the outer peripheral surface of the inner stirring tube are long stirring teeth. With the same diameter, the linear velocity at the outer edge of the short stirring teeth is less than that at the outer edge of the long stirring teeth. With different diameters, the linear velocity at the root of the short stirring teeth can be equal to that at the root of the long stirring teeth, achieving the same linear velocity in different diameter segments (different diameters, same linear velocity).

[0022] It should be noted that since one end of the inner stirring tube 6 where the pulley 10 is installed is located above the discharge end 4 of the silo 2, in order to avoid mutual interference and blockage between components, the discharge end 4 of the silo 2 extends outside the center of the belt 11, and a reserved through hole for the discharge end 4 of the discharge silo 2 to extend is provided on the frame 1 for enclosing the pulley 10. It can be a round hole or other structures, and its design purpose is only to facilitate the manufacturing and assembly of the structure.

[0023] When the coaxial different-speed mixer stirs the material, the two power rotating shafts of the double-output shaft motor 9 drive the outer stirring tube 5 and the inner stirring tube 6 to rotate through the belt 11 respectively, so as to fully stir the material in the silo 2.

[0024] The coaxial different-speed mixer has the following advantages:

[0025] (1) High-efficiency stirring ability: By adopting the design of the outer stirring tube 5 and the inner stirring tube 6 with the same axis but different speeds, the material can be subjected to shearing, extrusion and tumbling effects from different directions and speeds in the stirring space, thus achieving a more uniform and efficient mixing effect, which helps to shorten the stirring time and improve the production efficiency.

[0026] (2) Compact structure and space saving: Since the outer stirring tube 5 and the inner stirring tube 6 are coaxially arranged, and the driving device (double-output shaft motor 9) is directly installed at the bottom of the frame 1, the structure of the whole mixer is compact, occupies a small area, and is convenient for installation and use in a limited space;

[0027] (3) Flexible adjustment of stirring speed: By driving the outer stirring tube 5 and the inner stirring tube 6 respectively with the double-output shaft motor 9, the rotation speeds of the two can be independently adjusted, so as to be flexibly adjusted according to the characteristics of the material and the stirring requirements to achieve the best stirring effect;

[0028] (4) Stable and reliable transmission: Pulley 10 is fixedly arranged on the outer peripheral surfaces of the ends of the outer stirring tube 5 and the inner stirring tube 6 extending out of the storage bin 2, and is connected to the power output shaft of the double-output shaft motor 9 through the belt 11. This transmission method is simple and reliable, easy to maintain and replace the belt 11, and at the same time ensures the stability and durability of the stirring mechanism during high-speed rotation;

[0029] (5) Optimize the layout of the stirring area: The stirring space of the storage bin 2 is designed as an upper stirring area and a lower discharging area, and the height of the lower discharging area is lower than that of the upper stirring area. This design helps the material to gradually move downward during the stirring process and finally be smoothly discharged from the discharging end 4, avoiding the accumulation and blockage of the material in the stirring space;

[0030] (5) Enhance the stirring effect: A number of stirring teeth 7 are fixedly arranged on the outer peripheral surfaces of the outer stirring tube 5 and the inner stirring tube 6. These stirring teeth 7 can further strengthen the stirring effect on the material in the stirring space. Especially when the fluidity of the material is poor or more thorough mixing is required, the stirring effect can be significantly improved.

Claims

1. A coaxial and different-speed mixer, comprising a frame, characterized in that: is provided on the frame; a silo, the upper end of the silo is the feeding end, the lower end is the discharging end, a stirring space is formed inside the silo, and a feeding hopper for feeding materials into the silo is provided at the feeding end of the silo; a stirring mechanism, the stirring mechanism includes an outer stirring tube and an inner stirring tube arranged in the stirring space, the outer stirring tube is concentrically sleeved on the outer peripheral surface of the inner stirring tube, a rotary bearing is fixedly arranged at the part where the inner peripheral surface of the outer stirring tube contacts the outer peripheral surface of the inner stirring tube, the ends of the outer stirring tube and the inner stirring tube that are relatively far apart are respectively placed outside the silo, and a double-output shaft motor for driving the outer stirring tube and the inner stirring tube to rotate is arranged at the bottom of the frame, and the two power output shafts of the double-output shaft motor are in transmission connection with the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube; belt pulleys are fixedly arranged on the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube extending out of the silo, the belt pulleys are in belt transmission connection with the two power output shafts of the double-output shaft motor, and the outer diameters of the belt pulleys on the outer peripheral surfaces of the ends of the outer stirring tube and the inner stirring tube are different.

2. The coaxial and different-speed mixer according to claim 1, wherein: The outer diameter of the belt pulley on the outer peripheral surface of the end of the outer stirring tube is larger than the outer diameter of the belt pulley on the outer peripheral surface of the end of the inner stirring tube.

3. A coaxial and different-speed mixer according to claim 1, characterized in that: The upper part of the stirring space of the silo forms an upper stirring area for accommodating the outer stirring tube and the inner stirring tube, and the lower part of the stirring space forms a lower discharging area, and the height of the lower discharging area is lower than the height of the upper stirring area.

4. A coaxial and different-speed mixer according to any one of claims 1-3, characterized in that: A plurality of stirring teeth for stirring the materials in the stirring space are fixedly arranged on the outer peripheral surfaces of the outer stirring tube and the inner stirring tube.

5. A coaxial and different-speed mixer according to any one of claims 1-3, characterized in that: Oil seals are arranged at the front and rear end faces of the rotary bearing between the outer stirring tube and the inner stirring tube.

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