A high-precision powder metering device

Abstract

The utility model relates to powder metering technical field discloses a kind of high-precision powder metering devices, including feed rack, primary hopper and secondary hopper, and cement bin is provided on feed rack, and hydraulic gate is equipped at the outlet of cement bin;Feed screw feeder is provided below the outlet of cement bin, and feed screw feeder is used to deliver material to primary hopper;Primary hopper is supported by hopper frame, and pneumatic butterfly valve is equipped at its bottom, for controlling the feed of secondary hopper;Primary hopper weighing sensor is installed on primary hopper, for the static accurate weighing of material in primary hopper.Set primary hopper and secondary hopper are respectively weighed by high-precision weighing sensor, and weightlessness method flow calculation is carried out, and the accuracy and stability of measurement are significantly improved.Independent control instrument receives sensor signal, and the operation of feed screw feeder and discharging screw feeder is accurately controlled, and the accurate measurement and quantitative feeding of powder material are realized.

Description

Technical Field

[0001] This utility model relates to the field of powder metering technology, specifically a high-precision powder metering device. Background Technology

[0002] In industries such as power, pharmaceuticals, food, chemicals, and building materials, accurate metering and quantitative feeding of powders, granules, or lumps are crucial for ensuring product quality, improving production efficiency, and achieving automated control. Traditionally, these materials are metered using volumetric or dynamic metering equipment such as screw scales. However, with continuous advancements in production processes and increasingly stringent production standards, the accuracy of these traditional metering devices is no longer sufficient to meet the stringent requirements of modern high-precision, high-efficiency production. Their significant metering errors directly affect the accuracy of the final product's proportions and quality stability, leading to material waste and increased production costs.

[0003] Existing metering equipment, such as screw scales, is susceptible to interference from various factors, including material characteristics (such as flowability, viscosity, and tendency to bridging), feeding uniformity, and equipment mechanical vibration, resulting in poor metering stability and insufficient long-term reliability. Furthermore, traditional continuous feeding equipment struggles to achieve truly accurate static weighing during operation, and signal fluctuations and mechanical inertia further introduce metering errors during dynamic metering processes.

[0004] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a high-precision powder metering device. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision powder metering device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A high-precision powder metering device includes a feeding rack, a primary hopper, and a secondary hopper. A cement silo is installed on the feeding rack, and the hydraulic gate is installed at the outlet of the cement silo. A feeding screw conveyor is installed below the cement silo outlet, which is used to convey materials to the primary hopper. The primary hopper is supported by a hopper frame, and the bottom of the primary hopper is equipped with the pneumatic butterfly valve, which is used to control the feeding of material to the secondary hopper. The primary hopper weighing sensor is installed on the primary hopper and is used to perform static and accurate weighing of the material in the primary hopper. The secondary hopper is located below the primary hopper, and its bottom is connected to the feeding screw for continuous quantitative feeding. The secondary hopper weighing sensor is installed on the secondary hopper and is used to calculate the real-time flow rate and control the rotation speed of the feed screw using the weightlessness method.

[0007] As a preferred technical solution, both the primary hopper and the secondary hopper are equipped with independent control instruments, which receive signals from the primary hopper weighing sensor and the secondary hopper weighing sensor respectively, and independently control the start and stop of the feeding screw and the rotation speed of the discharge screw.

[0008] As a preferred technical solution, the inner walls of the primary and secondary hoppers are equipped with vibration motors to prevent powder materials from bridging and ensure smooth material flow.

[0009] As a preferred technical solution, the feeding screw is controlled by a frequency converter, and its rotation speed is adjusted in real time by receiving feedback signals from the secondary hopper weighing sensor to maintain the set flow rate.

[0010] As a preferred technical solution, the primary hopper weighing sensor and the secondary hopper weighing sensor are high-precision weighing sensors.

[0011] As a preferred technical solution, the pneumatic butterfly valve is controlled by the control instrument of the primary hopper and opens after the primary hopper completes static weighing to quickly feed material into the secondary hopper.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a high-precision powder metering device. The primary and secondary hoppers are equipped with high-precision weighing sensors for static accurate weighing and loss-in-weight flow calculation, significantly improving the accuracy and stability of metering. An independent control instrument receives sensor signals and precisely controls the operation of the feeding and unloading screw conveyors, achieving accurate metering and quantitative feeding of powder materials. Simultaneously, the vibrating motor effectively prevents powder material bridging, ensuring smooth material flow. Furthermore, the frequency converter-controlled unloading screw conveyor adjusts its speed based on real-time feedback signals to maintain the set flow rate, further improving metering accuracy and stability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-precision powder metering device.

[0014] In the attached diagram, the following are the reference numerals: 1. Feeding rack; 2. Cement silo; 3. Hydraulic gate; 4. Feeding screw conveyor; 5. Hopper frame; 6. Primary hopper; 61. Primary hopper load cell; 7. Pneumatic butterfly valve; 8. Secondary hopper; 81. Secondary hopper load cell; 9. Discharge screw conveyor. Detailed Implementation

[0015] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0016] like Figure 1 As shown, this utility model provides a high-precision powder metering device, which includes components such as a feeding rack 1, a cement silo 2, a hydraulic gate 3, a feeding screw 4, a hopper rack 5, a primary hopper 6, a pneumatic butterfly valve 7, a secondary hopper 8, and a discharge screw 9.

[0017] A cement silo 2 is installed on the feeding rack 1. A hydraulic gate 3 is installed at the outlet of the cement silo 2 to control the outflow of materials. A feeding screw 4 is connected below the outlet of the cement silo 2. The feeding screw 4 is used to transport materials from the cement silo 2 to the primary hopper 6.

[0018] The primary hopper 6 is supported by the hopper frame 5, and a pneumatic butterfly valve 7 is installed at its bottom to control the feeding of materials into the secondary hopper 8. A primary hopper weighing sensor 61 is installed on the primary hopper 6, which is used to perform static and accurate weighing of the materials in the primary hopper 6.

[0019] The secondary hopper 8 is located below the primary hopper 6, and its bottom is connected to the feed screw 9 for continuously and quantitatively discharging material. A secondary hopper weighing sensor 81 is installed on the secondary hopper 8. This sensor is used to calculate the real-time flow rate using the loss-in-weight method and to control the rotation speed of the feed screw 9 based on the real-time flow rate.

[0020] In a preferred embodiment of this invention, both the primary hopper 6 and the secondary hopper 8 are equipped with independent control instruments (not shown in the figure). The control instrument for the primary hopper receives the signal from the primary hopper weighing sensor 61 and controls the start and stop of the feeding screw 4 and the opening of the pneumatic butterfly valve 7 according to the signal. The control instrument for the secondary hopper receives the signal from the secondary hopper weighing sensor 81 and controls the rotational speed of the discharge screw 9 according to the signal.

[0021] Furthermore, both the primary hopper 6 and the secondary hopper 8 are equipped with vibrating motors (not shown in the figure) on their inner walls. The vibrating motors are used to prevent powder materials from bridging inside the hoppers and to ensure smooth material flow.

[0022] The feed screw conveyor 9 is controlled by a frequency converter (not shown in the figure). The frequency converter receives the feedback signal from the secondary hopper weighing sensor 81 and adjusts the rotation speed of the feed screw conveyor 9 in real time according to the signal to maintain the set flow rate.

[0023] Both the primary hopper weighing sensor 61 and the secondary hopper weighing sensor 81 are high-precision weighing sensors to ensure the accuracy and stability of the measurement.

[0024] The pneumatic butterfly valve 7 is controlled by the control instrument of the primary hopper 6. After the primary hopper 6 completes static weighing, the control instrument controls the pneumatic butterfly valve 7 to open, quickly feeding the material in the primary hopper 6 into the secondary hopper 8.

[0025] This high-precision powder metering device significantly improves the accuracy and stability of metering by setting up a primary hopper and a secondary hopper for static precision weighing and loss-in-weight flow calculation, respectively. Simultaneously, through the coordinated action of independent control instruments, a vibration motor, and a frequency converter, it achieves precise metering and quantitative feeding of powder materials.

[0026] The working principle and usage process of this utility model: After assembling the various components of this solution in sequence, work according to the above implementation methods according to actual needs to complete all working steps.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection 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.

[0030] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A high-precision powder metering device, characterized in that, It includes a feeding rack (1), a primary hopper (6) and a secondary hopper (8). A cement silo (2) is provided on the feeding rack (1), and a hydraulic gate (3) is provided at the outlet of the cement silo (2). A feeding screw (4) is provided below the outlet of the cement silo (2), and the feeding screw (4) is used to transport the material to the primary hopper (6). The primary hopper (6) is supported by a hopper frame (5), and a pneumatic butterfly valve (7) is provided at its bottom to control the feeding of material to the secondary hopper (8); The primary hopper (6) is equipped with a primary hopper weighing sensor (61) for static and accurate weighing of the material in the primary hopper (6). The secondary hopper (8) is located below the primary hopper (6), and its bottom is connected to the feeding screw (9) for continuous quantitative feeding; The secondary hopper (8) is equipped with a secondary hopper weighing sensor (81), which is used to calculate the real-time flow rate using the weightlessness method and control the rotation speed of the feed screw (9).

2. The high-precision powder metering device according to claim 1, characterized in that: The primary hopper (6) and the secondary hopper (8) are each equipped with independent control instruments, which receive signals from the primary hopper weighing sensor (61) and the secondary hopper weighing sensor (81) respectively, and independently control the start and stop of the feeding screw (4) and the rotation speed of the discharge screw (9).

3. The high-precision powder metering device according to claim 1, characterized in that: The inner walls of the primary hopper (6) and the secondary hopper (8) are equipped with vibration motors to prevent powder materials from bridging and to ensure smooth material flow.

4. The high-precision powder metering device according to claim 1, characterized in that: The feed screw (9) is controlled by a frequency converter and adjusts its rotation speed in real time by receiving feedback signals from the secondary hopper weighing sensor (81) to maintain the set flow rate.

5. The high-precision powder metering device according to claim 1, characterized in that: The primary hopper weighing sensor (61) and the secondary hopper weighing sensor (81) are high-precision weighing sensors.

6. The high-precision powder metering device according to claim 1, characterized in that: The pneumatic butterfly valve (7) is controlled by the control instrument of the first-stage hopper (6). It opens after the first-stage hopper (6) completes static weighing and quickly feeds material into the second-stage hopper (8).

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