An accurately weighed stirring device

Abstract

The utility model discloses a kind of accurate weighing's stirring device, including frame, frame is multilayer metal frame structure;Raw material weighing component, at least including two, set in the top of frame, for to the stirring raw material metering weighing;Stirring container, set in the middle of frame, for accommodating the material to be stirred;Stirrer, set in stirring container, for stirring material;Driving mechanism, with stirrer is connected, for driving stirrer rotation;Control system, with raw material weighing component and driving mechanism electric connection, for according to weighing data control driving mechanism's operation.The utility model provides a kind of accurate weighing's stirring device, adopt special hollow spiral stirring blade structure, combine from the high-speed gas jet that the back flow surface and end of stirring blade spouts, can produce strong shear, convection and diffusion effect, especially suitable for uniform mixing of easy agglomeration material, and can realize gas-solid high-efficiency contact.

Description

Technical Field

[0001] This utility model relates to the field of material weighing and mixing technology, and in particular to a mixing device for precise weighing. Background Technology

[0002] In many industrial sectors, such as chemicals, pharmaceuticals, food, and building materials, it is often necessary to mix multiple raw materials in precise proportions.

[0003] The traditional ingredient mixing process usually involves weighing each ingredient on a separate weighing device and then mixing them in a separate mixing device.

[0004] This separate operation has the following drawbacks: First, materials may be lost or contaminated during the transfer process, affecting the accuracy of the proportioning and the purity of the product; second, there are many processes, the equipment occupies a large area, and the production efficiency is not high; for special processes that require strict control of the feeding sequence or the introduction of auxiliary gases (such as inert gas protection or the participation of reactive gases) during the mixing process, traditional equipment is difficult to achieve integrated control. Utility Model Content

[0005] Therefore, it is necessary to provide a precise weighing mixing device to address the above-mentioned technical problems, which enables online precise weighing, sequential feeding, and efficient mixing of raw materials, and can uniformly introduce gas during the mixing process as needed.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A precise weighing stirring device, comprising:

[0008] The frame is a multi-layer metal frame structure;

[0009] The raw material weighing components, including at least two, are disposed on the top of the frame for weighing the stirred raw materials.

[0010] A mixing container, located in the middle of the frame, is used to hold the material to be mixed;

[0011] A stirrer, disposed inside the stirring container, is used to stir the material;

[0012] A drive mechanism, connected to the stirrer, is used to drive the stirrer to rotate;

[0013] The control system is electrically connected to the raw material weighing component and the drive mechanism, and is used to control the operation of the drive mechanism according to the weighing data;

[0014] The agitator includes a stirring shaft rotatably connected to the middle of the stirring container and stirring blades fixedly installed on the outer wall of the stirring shaft;

[0015] Multiple hollow shaft columns are fixedly connected to the outer wall of the stirring shaft;

[0016] The sidewalls of the stirring blade and the hollow shaft are provided with several injection holes;

[0017] The gas path inside the stirring blade is formed by multiple reinforcing ribs arranged in an alternating pattern on the inner wall of the stirring blade. The throat of the injection hole also has a spiral guide plate, and the injection hole forms a Venturi tube structure along the gas flow direction so that the ejected gas forms a spiral high-speed jet.

[0018] Both the stirring shaft and the stirring blades are hollow structures. The stirring blades are two symmetrically arranged spiral stirring blades, and the two ends of the multiple hollow shaft columns are respectively connected to the stirring blades and the stirring shaft.

[0019] The frame is also equipped with a supply component for providing high-pressure gas to the stirring shaft. The gas passages inside the stirring blade are distributed in a grid pattern, and the injection holes are opened on the back flow surface and end of the stirring blade.

[0020] Furthermore, the raw material weighing component includes a weighing sensor and a weighing container, with the weighing sensor disposed between the weighing container and the frame.

[0021] Furthermore, the weighing container has a discharge port at the bottom and an electric push rod hinged to its outer wall. The output end of the electric push rod is rotatably connected to a discharge valve plate, which is rotatably connected to the weighing container.

[0022] Furthermore, the driving mechanism is a servo motor, and the output end of the servo motor is fixedly connected to the stirring shaft.

[0023] Furthermore, the supply component includes a high-pressure pump, the output end of which is connected to a sealed bearing via a conduit, the sealed bearing being rotatably mounted on the end of the stirring shaft.

[0024] Furthermore, the bottom of the frame is equipped with casters to facilitate movement of the frame.

[0025] Furthermore, the bottom of the mixing container is provided with a discharge port, and an electric push rod two is hinged to the outer wall. One end of the electric push rod two is rotatably connected to a sealing baffle. The sealing baffle is hinged to the outer wall of the mixing container so as to be driven to open and close relative to the mixing container by the electric push rod two.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention provides a precise weighing stirring device that employs a special hollow spiral stirring blade structure and a grid-like internal air passage. On one hand, it acts as an internal "reinforcing rib," compensating for the strength loss caused by the openings on the back flow surface. On the other hand, it rectifies and equalizes the high-pressure gas, ensuring that the jet velocity and impact force ejected from each back flow surface micro-hole are highly uniform. This creates a uniform and symmetrical shear force field within the stirring container. The high-speed spiral jet has extremely high angular momentum, inducing a strong three-dimensional swirling field (including tangential velocity, axial velocity, and radial velocity) within the stirring container. A powerful negative pressure zone is formed at the center of the swirling flow, generating a "capsulation effect" that continuously draws distant powder particles into the shear zone, greatly expanding the effective mixing radius of a single jet orifice.

[0028] By introducing different gases (such as nitrogen, carbon dioxide, and reaction gases) into the agitator, various process requirements such as inert atmosphere protection and chemical reactions can be easily met. The multi-station weighing, stirring, and gas introduction functions are integrated into one unit. Multiple independent raw material weighing components, together with high-precision sensors and controllable discharge valves, can achieve accurate metering and on-demand, sequential delivery of various raw materials. Attached Figure Description

[0029] Figure 1 A schematic diagram of the overall structure of a precise weighing stirring device provided by this utility model;

[0030] Figure 2 A side view of the stirring device for precise weighing provided by this utility model;

[0031] Figure 3 A front view schematic diagram of a stirring device for precise weighing provided by this utility model;

[0032] Figure 4 A schematic diagram of the stirrer and supply component of a precision weighing stirring device provided by this utility model;

[0033] Figure 5 A schematic diagram of the raw material weighing component of a precision weighing mixing device provided by this utility model;

[0034] Figure 6 This utility model provides a precise weighing stirring device. Figure 4 Top view of the structure;

[0035] Figure 7 This utility model provides a precise weighing stirring device. Figure 6 Enlarged structural diagram at point A in the middle;

[0036] Figure 8A partial cross-sectional view of the stirring blade of a precision weighing stirring device provided by this utility model.

[0037] The markings in the diagram are explained as follows:

[0038] 1. Framework;

[0039] 2. Raw material weighing components; 21. Weighing sensor; 22. Weighing container; 23. Electric push rod one; 24. Discharge valve plate;

[0040] 3. Mixing container; 31. Electric push rod II; 32. Sealing baffle;

[0041] 4. Agitator; 41. Agitator shaft; 42. Agitator blades; 43. Hollow shaft column; 44. Injection hole; 45. Spiral guide plate;

[0042] 46. ​​Reinforcing ribs protrude;

[0043] 5. Drive mechanism;

[0044] 6. Supply components; 61. High-pressure pump; 62. Sealed bearing. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0046] Example 1

[0047] Please refer to Figure 1-8 A precise weighing mixing device, comprising:

[0048] Frame 1 is a multi-layer metal frame structure, and casters are installed at the bottom of Frame 1 to facilitate its movement.

[0049] The raw material weighing component 2, including at least two, is set on the top of the frame 1 and is used to weigh the stirred raw material.

[0050] The mixing container 3 is located in the middle of the frame 1 and is used to hold the material to be mixed. The discharge port of the raw material weighing component 2 corresponds to the inlet of the mixing container 3.

[0051] Agitator 4 is installed inside the mixing container 3 and is used to mix materials;

[0052] The drive mechanism 5 is connected to the stirrer 4 and is used to drive the stirrer 4 to rotate.

[0053] The control system is electrically connected to the raw material weighing component 2 and the drive mechanism 5, and is used to control the operation of the drive mechanism 5 according to the weighing data.

[0054] Example 2

[0055] The mixing device for accurate weighing provided in Embodiment 1 is further optimized. Specifically, the raw material weighing component 2 includes a weighing sensor 21 and a weighing container 22. The weighing sensor 21 is disposed between the weighing container 22 and the frame 1. The weighing container 22 is suspended on the frame 1 by the high-precision weighing sensor 21, thereby realizing real-time accurate measurement of the weight of the material in the container.

[0056] The weighing container 22 has a discharge port at the bottom and an electric push rod 23 is hinged to the outer wall. The output end of the electric push rod 23 is rotatably connected to a discharge valve plate 24. The discharge valve plate 24 is rotatably connected to the weighing container 22. By controlling the extension and retraction of the electric push rod 23, the discharge valve plate 24 can be driven to rotate around the hinge point, thereby opening or closing the discharge port.

[0057] Example 3

[0058] The mixing device for accurate weighing provided in Embodiment 1 or 2 is further optimized. The mixer 4 includes a mixing shaft 41 rotatably connected to the middle of the mixing container 3 and a mixing blade 42 fixedly installed on the outer wall of the mixing shaft 41. The driving mechanism 5 is a servo motor and the output end of the servo motor is fixedly connected to the mixing shaft 41. The mixing container 3 is located at the bottom of the two weighing containers 22 and directly stores the raw materials put into the weighing containers. The servo motor is fixedly installed on the frame 1 to form a stable support.

[0059] Furthermore, the top of the mixing container 3 can be sealed with a sealing cap to form a sealed state inside the mixing container 3. The top of the sealing cap is connected to multiple weighing containers 22 via a conduit with a valve.

[0060] Both the stirring shaft 41 and the stirring blades 42 are hollow structures. The stirring blades 42 are two symmetrically arranged spiral stirring blades. Multiple hollow shaft columns 43 are fixedly connected to the outer wall of the stirring shaft 41. The two ends of the multiple hollow shaft columns 43 are respectively connected to the stirring blades 42 and the stirring shaft 41.

[0061] To further optimize the gas ejection effect, the sidewalls of the stirring blade 42 and the hollow shaft column 43 are provided with several injection holes 44. The frame 1 is also equipped with a supply component 6 for providing high-pressure gas to the stirring shaft 41. The gas path inside the stirring blade 42 is distributed in a grid pattern. The injection holes 44 are opened on the back flow surface and end of the stirring blade 42. The gas path inside the stirring blade 42 is composed of multiple reinforcing rib protrusions 46 arranged in a staggered manner on the inner wall of the stirring blade 42. The throat of the injection hole 44 also has a spiral guide plate 45, and the injection hole 44 forms a Venturi tube structure along the gas flow direction so that the ejected gas forms a spiral high-speed jet. This structure accelerates the gas flow due to the throttling effect and can be ejected in the form of a spiral jet at a higher speed. The ejected gas is no longer a straight airflow, but a spiral high-speed jet. This jet has extremely high angular momentum and can induce a strong three-dimensional swirling field in the stirring container, including tangential velocity, axial velocity and radial velocity.

[0062] The swirling center forms a strong negative pressure zone, generating a "capsulation effect" that continuously draws powder particles from a distance into the shear zone, greatly expanding the effective mixing radius of a single injection hole and solving the problem of "clumping" dead zones for easily agglomerated materials.

[0063] The grid-like reinforcing ribs 46 act like load-bearing walls in a building, significantly improving the resistance of the stirring blades 42 to pressure and torsional stiffness against high-pressure gas impacts, thus extending the equipment's lifespan. Without the grid, after the gas enters the wide, hollow blades, the airflow through the micropores near the inlet hollow shaft is extremely high, while the micropores at the blade tips experience almost no airflow. The grid-like airflow path divides the elongated cavity into multiple independent micro-pressure-stabilizing chambers, forcing the high-pressure gas to redistribute throughout the blade, ensuring a highly consistent jet velocity from all the injection holes 44 from the blade root to the tip, achieving true uniform mixing.

[0064] The frame 1 is also equipped with a supply component 6 for supplying high-pressure gas to the stirring shaft 41. The supply component 6 includes a high-pressure pump 61. The output end of the high-pressure pump 61 is connected to a sealed bearing 62 through a conduit. The sealed bearing 62 is rotatably mounted on the end of the stirring shaft 41.

[0065] The sealing bearing 62 forms a sealed connection with the stirring shaft 41, which ensures a continuous supply and prevents air leakage. At the same time, it allows relative rotation between the stirring shaft 41 and the sealing bearing 62. Gases such as nitrogen, carbon dioxide, or process gases generated by the high-pressure pump 61 enter the inner cavity of the rotating stirring shaft 41 through the sealing bearing 62. The gas is then distributed to each hollow shaft column 43 and enters the inner cavity of the spiral stirring blade 42. Finally, it is evenly sprayed out from the injection hole 44 into the material in the stirring container 3.

[0066] This tapered orifice design utilizes the principle of fluid throttling to accelerate the gas as it is ejected, forming a high-speed jet. The high-speed gas jet can penetrate the material more effectively, generating strong shear force, breaking up agglomerates, and promoting contact between the gas and solid materials. It is particularly suitable for fine mixing processes that require gas-solid reactions or to prevent oxidation.

[0067] Example 4

[0068] The mixing device for accurate weighing provided in Embodiment 3 is further optimized. The bottom of the mixing container 3 is provided with a discharge port, and an electric push rod 31 is hinged to the outer wall. One end of the electric push rod 31 is rotatably connected to a sealing baffle 32. The sealing baffle 32 is hinged to the outer wall of the mixing container 3 so as to be driven to open and close relative to the mixing container 3 by the electric push rod 31.

[0069] The extension and retraction of the electric push rod 31 can directly push the sealing baffle 32 to rotate relative to the mixing container 3, and the material is unloaded directly by opening and closing the sealing baffle 32.

[0070] The process of using the precise weighing stirring device provided by this utility model is as follows:

[0071] Operators or the automated system can add different raw materials into two or more weighing containers 22. The control system reads the data from each weighing sensor 21 in real time and stops feeding when the preset weight is reached.

[0072] According to the preset program, the control system first controls the electric push rod 23 of a raw material weighing component 2 to open the discharge valve plate 24 and put the first raw material into the mixing container 3 below; then closes the valve plate and controls the second weighing component to feed the material, thereby achieving orderly feeding and avoiding problems that may be caused by disorderly mixing; during or after feeding, the control system starts the servo motor of the drive mechanism 5 to drive the agitator 4 to rotate and perform preliminary mixing of the materials.

[0073] During the mixing process, if gas needs to be introduced, the control system starts the high-pressure pump 61. The high-pressure gas passes through the sealed bearing 62, the hollow stirring shaft 41, and the hollow shaft column 43, and is finally ejected in the form of a spiral high-speed jet from the back flow surface and the injection hole 44 at the end of the stirring blade 42. The rotating stirring blade and the ejected gas jet work together to achieve efficient and uniform mixing of materials and gas dispersion, while ensuring that the materials do not accumulate at the discharge port.

[0074] After mixing is complete, stirring stops. The control system controls the electric push rod 31 at the bottom of the mixing container 3 to open the sealing baffle 32, and the mixed material is discharged from the discharge port, completing one work cycle.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A precise weighing stirring device, characterized in that, It includes: Frame (1), wherein the frame (1) is a multi-layer metal frame structure; The raw material weighing component (2) includes at least two components, which are disposed on the top of the frame (1) for weighing the stirred raw material. A stirring container (3) is set in the middle of the frame (1) for holding the material to be stirred; A stirrer (4) is disposed inside the stirring container (3) for stirring the material; A drive mechanism (5) is connected to the stirrer (4) and is used to drive the stirrer (4) to rotate; The control system is electrically connected to the raw material weighing component (2) and the drive mechanism (5) and is used to control the operation of the drive mechanism (5) according to the weighing data; The stirrer (4) includes a stirring shaft (41) rotatably connected to the middle of the stirring container (3) and stirring blades (42) fixedly installed on the outer wall of the stirring shaft (41). Multiple hollow shaft columns (43) are fixedly connected to the outer wall of the stirring shaft (41). The sidewalls of the stirring blade (42) and the hollow shaft (43) are provided with a number of injection holes (44). The gas path inside the stirring blade (42) is composed of multiple reinforcing ribs (46) arranged in an alternating manner on the inner wall of the stirring blade (42). The throat of the injection hole (44) also has a spiral guide plate (45), and the injection hole (44) forms a Venturi tube structure along the gas flow direction so that the ejected gas forms a spiral high-speed jet. The stirring shaft (41) and stirring blade (42) are both hollow structures. The stirring blade (42) consists of two symmetrically arranged spiral stirring blades. The two ends of the multiple hollow shaft columns (43) are respectively connected to the stirring blade (42) and the stirring shaft (41). The frame (1) is also equipped with a supply component (6) for providing high-pressure gas to the stirring shaft (41). The gas passages in the stirring blade (42) are distributed in a grid pattern. The injection holes (44) are opened on the back flow surface and end of the stirring blade (42).

2. The precise weighing stirring device according to claim 1, characterized in that, The raw material weighing component (2) includes a weighing sensor (21) and a weighing container (22), wherein the weighing sensor (21) is disposed between the weighing container (22) and the frame (1).

3. The precise weighing stirring device according to claim 2, characterized in that, The weighing container (22) has a discharge port at the bottom and an electric push rod (23) hinged to its outer wall. The output end of the electric push rod (23) is rotatably connected to a discharge valve plate (24), which is rotatably connected to the weighing container (22).

4. The precise weighing stirring device according to claim 1, characterized in that, The drive mechanism (5) is a servo motor and the output end of the servo motor is fixedly connected to the stirring shaft (41).

5. The precise weighing stirring device according to claim 1, characterized in that, The supply component (6) includes a high-pressure pump (61), the output end of which is connected to a sealed bearing (62) via a conduit, and the sealed bearing (62) is rotatably mounted on the end of the stirring shaft (41).

6. The precise weighing stirring device according to claim 1, characterized in that, The bottom of the frame (1) is equipped with casters to facilitate the movement of the frame (1).

7. The precise weighing stirring device according to claim 1, characterized in that, The bottom of the mixing container (3) is provided with a discharge port, and an electric push rod (31) is hinged to the outer wall. One end of the electric push rod (31) is rotatably connected to a sealing baffle (32). The sealing baffle (32) is hinged to the outer wall of the mixing container (3) so that it can be driven to open and close relative to the mixing container (3) by the electric push rod (31).

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