Continuous powder metering system

Abstract

The utility model discloses a continuous powder metering system, which belongs to the field of metallurgy and fine chemical engineering and comprises a surge bin, a middle bin and a weightlessness metering bin which are sequentially connected. A first weighing sensor, a second weighing sensor and a third weighing sensor are respectively arranged on the surge bin, the middle bin and the weightlessness metering bin; and an airflow mixing device for mixing materials is arranged in the surge bin. The buffering bin, the middle bin and the weightlessness measuring bin are sequentially connected, the weighing sensors are arranged in the bins, and the airflow mixing device is arranged in the buffering bin, so that powder materials can be accurately measured and homogenized, the consistency of the materials in the same batch is guaranteed, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model belongs to the fields of metallurgy and fine chemical industry, and specifically relates to a powder continuous metering system. Background Art

[0002] With the development of modern industrial technology, powder materials are increasingly used in a variety of fields, including chemical, pharmaceutical, and food processing. Accurate metering of powder materials is crucial to ensuring the quality of the final product and the stability of the production process. However, due to the characteristics of powder materials such as easy agglomeration and poor flowability, problems such as inaccurate metering and uneven mixing are often encountered in actual production processes. These problems not only affect production efficiency but also reduce product quality.

[0003] Traditional powder metering methods often rely on intermittent operation, where a certain amount of powder is placed in a container, weighed, and then transferred to the next process. While simple, this method has numerous drawbacks when processing large quantities of material, including low metering accuracy, cumbersome operation, and difficulty achieving continuous production. Therefore, a technical solution of continuous weighing has emerged. For example, the utility model patent with announcement number CN204666236U discloses a weighing device for a flour mixer, including a PLC control system, a frame, and a feed bin, a metering bin and a soft connection bin arranged on the frame. The feed bin is provided with a flour inlet and an air outlet, a sintered filter element is provided at the air outlet, and the air outlet is connected to a negative pressure fan through a pipe. A plurality of weighing sensors are provided between the feed bin and the metering bin, a first butterfly valve is provided between the metering bin and the soft connection bin, the first butterfly valve is connected to the first cylinder, a first solenoid valve is installed on the first cylinder, a second butterfly valve is provided between the soft connection bin and the mixer box, the second butterfly valve is connected to the second cylinder, a second solenoid valve is installed on the second cylinder, and the weighing sensor, the first solenoid valve and the second solenoid valve are electrically connected to the PLC control system respectively.

[0004] However, these traditional methods often lack effective mixing means, which makes the powder materials prone to stratification or agglomeration during the transportation process, further affecting the uniformity and consistency of the final product.

[0005] In view of this, this application is hereby filed. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a continuous powder metering system.

[0007] The utility model is realized through the following technical solutions:

[0008] A powder continuous metering system comprises a buffer bin, an intermediate bin and a loss-in-weight metering bin connected in sequence;

[0009] The buffer bin, the intermediate bin and the weight loss metering bin are respectively provided with a first weighing sensor, a second weighing sensor and a third weighing sensor;

[0010] An air flow mixing device for mixing materials is provided in the buffer bin.

[0011] Preferably, the buffer bin, the intermediate bin and the weightlessness metering bin are all provided with fluidized air cushions.

[0012] Preferably, the buffer bin and the intermediate bin are connected via a first material control valve, and the intermediate bin and the loss-in-weight metering bin are connected via a second material control valve.

[0013] Preferably, a first gas pipeline is provided between the buffer bin and the intermediate bin, and a second gas pipeline is provided between the intermediate bin and the weightlessness metering bin;

[0014] Gas control valves are installed on both the first gas pipeline and the second gas pipeline.

[0015] Preferably, a dust collector is installed on the buffer bin.

[0016] Preferably, the first gas pipeline and the second gas pipeline are both provided with dust collection pipelines, and the dust collection pipelines are connected to the dust collector through a gas control valve.

[0017] Preferably, a star-shaped discharge valve is provided at the bottom of the weight loss metering bin.

[0018] Preferably, the continuous metering system further comprises a controller, and the star-shaped discharge valve, the first weighing sensor, the second weighing sensor, the third weighing sensor and the gas control valve are all electrically connected to the controller.

[0019] Preferably, a stirring device is installed on the loss-in-weight metering bin for stirring the powder.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By connecting the buffer bin, intermediate bin and loss-in-weight metering bin in sequence, equipping each bin with a weighing sensor and setting an air flow mixing device in the buffer bin, it is possible to achieve accurate metering and homogenization of powder materials, ensure the consistency of materials in the same batch, and improve production efficiency and product quality.

[0022] 2. By adding a fluidizing air cushion in each bin, the fluidity of the powder can be effectively improved, avoiding blockage caused by material adhesion, and ensuring the stable operation and metering accuracy of the system.

[0023] 3. By setting material control valves between the buffer bin and the intermediate bin, and between the intermediate bin and the weight loss metering bin, effective control of material flow is achieved, which helps to improve the response speed and control accuracy of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a connection diagram of the present utility model.

[0025] In the figure: 1. Buffer bin; 2. Intermediate bin; 3. Loss-in-weight metering bin; 4. First weighing sensor; 5. First material control valve; 6. Gas control valve; 7. Dust collector; 8. Stirring device; 9. Star-shaped discharge valve; 10. Second weighing sensor; 11. Third weighing sensor; 12. Fluidizing air cushion; 13. Second material control valve; 14. First gas pipeline; 15. Second gas pipeline. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, this embodiment provides a powder continuous metering system, comprising a buffer bin 1, an intermediate bin 2 and a loss-in-weight metering bin 3 connected in sequence;

[0028] The buffer bin 1, the intermediate bin 2 and the weight loss metering bin 3 are respectively provided with a first weighing sensor 4, a second weighing sensor 10 and a third weighing sensor 11;

[0029] The buffer bin 1 is provided with an air flow mixing device for mixing materials.

[0030] By connecting the buffer bin 1, the intermediate bin 2 and the loss-in-weight metering bin 3 in sequence, and configuring a weighing sensor in each bin and setting an air flow mixing device in the buffer bin 1, it is possible to accurately measure and homogenize the powder material, ensure the consistency of the materials in the same batch, and improve production efficiency and product quality.

[0031] Preferably, the buffer bin 1 , the intermediate bin 2 and the weightlessness metering bin 3 are all provided with a fluidizing air cushion 12 .

[0032] By adding a fluidizing air cushion 12 in each bin, the fluidity of the powder can be effectively improved, and blockage caused by material adhesion can be avoided, thereby ensuring the stable operation and metering accuracy of the system.

[0033] The buffer bin 1 and the intermediate bin 2 are connected via a first material control valve 5 , and the intermediate bin 2 and the weight loss metering bin 3 are connected via a second material control valve 13 .

[0034] By setting material control valves between the buffer bin 1 and the intermediate bin 2, and between the intermediate bin 2 and the weight loss metering bin 3, effective control of the material flow is achieved, which helps to improve the response speed and control accuracy of the entire system.

[0035] Preferably, a first gas pipeline 14 is provided between the buffer warehouse 1 and the intermediate warehouse 2, and a second gas pipeline 15 is provided between the intermediate warehouse 2 and the weight loss metering warehouse 3;

[0036] Gas control valves 6 are installed on both the first gas pipeline 14 and the second gas pipeline 15 .

[0037] The addition of the first gas pipeline 14, the second gas pipeline 15 and the corresponding gas control valve 6 can not only promote the transportation of materials, but also better adjust the pressure environment in each warehouse to prevent material backflow or leakage.

[0038] The buffer bin 1 is provided with a dust collector 7. The dust collector 7 is provided on the buffer bin 1 to effectively collect dust generated during operation, reduce environmental pollution, and also help protect the health and safety of operators.

[0039] Both the first gas pipeline 14 and the second gas pipeline 15 are provided with dust collection pipelines, which are connected to the dust collector 7 via the gas control valve 6. By providing the dust collection pipelines on the gas pipelines and connecting them to the dust collector 7, the environmental performance of the system is further enhanced, ensuring the cleanliness of the working environment.

[0040] The bottom of the weight loss metering bin 3 is provided with a star-shaped discharge valve 9. The star-shaped discharge valve 9 at the bottom of the weight loss metering bin 3 can ensure that the material is discharged at a constant speed, which is crucial to maintaining the continuity and stability of the system.

[0041] The airflow mixing device in the present application is an airflow mixer and other commonly used devices in the field. The weight loss metering bin 3 and the star-shaped discharge valve 9 are also conventional technologies in the field and will not be described in detail here.

[0042] Preferably, the continuous metering system further includes a controller, to which the star-shaped discharge valve 9, first load cell 4, second load cell 10, third load cell 11, and gas control valve 6 are all electrically connected. Introducing a controller to centrally manage key components such as the star-shaped discharge valve 9 and load cells enables intelligent control of the entire system, significantly improving operational convenience and the system's automation level. The specific controller can be controlled by a system such as a DCS.

[0043] Preferably, a stirring device 8 is installed on the loss-in-weight metering bin 3 for stirring the powder. The stirring device 8 installed on the loss-in-weight metering bin 3 can continuously stir the powder during the metering process to prevent material agglomeration and ensure uniform distribution and accurate metering of the powder.

[0044] Workflow:

[0045] Feed mixing: The upstream conveying equipment transports the material into the buffer bin 1. After the feeding is completed, fluidizing gas is introduced into the fluidizing gas cushion 12 of the buffer bin 1 to mix and homogenize the material. After the completion, wait.

[0046] Static metering: The air flow mixing device of the buffer bin 1 is started. After the material is fluidized, the gas control valve 6 is opened, and the first material control valve 5 is opened to feed the intermediate bin 2. The feeding adopts dual protection of weighing and time. When the feeding time or weight reaches the set value, the first material control valve 5 is closed, and the fluidizing gas is stopped from being fed to the intermediate bin 2. After standing for a certain period of time, the intermediate bin 2 is weighed, and the feeding weight is determined by the difference before and after feeding, and the controller automatically records it.

[0047] Loss-in-weight metering: Fluidizing gas is introduced into intermediate chamber 2 and loss-in-weight metering chamber 3. The second material control valve 13 between intermediate chamber 2 and loss-in-weight metering chamber 3 is opened. Material feeding also utilizes both weight and time protection. When the feeding time or weight reaches a set value, the second material control valve 13 of intermediate chamber 2 is closed, stopping the flow of fluidizing gas to intermediate chamber 2 and loss-in-weight metering chamber 3. After a set period of quiescence, intermediate chamber 2 and loss-in-weight metering chamber 3 are weighed. The difference before and after feeding is used to determine the feeding weight, which is automatically recorded by the controller. The star-shaped discharge valve 9 and each load cell are controlled in conjunction with the controller, which automatically adjusts the discharge amount.

[0048] During system operation, the fluidizing gas in intermediate chamber 2 and loss-in-weight metering chamber 3 is always on, as is the agitator 8 in this chamber. The controller employs a specific priority logic program to run three sub-logics: feed mixing, static metering, and loss-in-weight metering, ensuring metering stability.

Claims

1. A powder continuous metering system, characterized by: It comprises a buffer bin (1), an intermediate bin (2) and a weight loss metering bin (3) which are connected in sequence; The buffer bin (1), the intermediate bin (2) and the weight loss metering bin (3) are respectively provided with a first weighing sensor (4), a second weighing sensor (10) and a third weighing sensor (11); An air flow mixing device for mixing materials is provided in the buffer bin (1).

2. A powder continuous metering system according to claim 1, characterized in that: The buffer bin (1), the intermediate bin (2) and the weight loss metering bin (3) are all provided with a fluidizing air cushion (12).

3. A powder continuous metering system according to claim 1, characterized in that: The buffer bin (1) and the intermediate bin (2) are connected via a first material control valve (5), and the intermediate bin (2) and the weight loss metering bin (3) are connected via a second material control valve (13).

4. A powder continuous metering system according to claim 1, characterized in that: A first gas pipeline (14) is provided between the buffer bin (1) and the intermediate bin (2), and a second gas pipeline (15) is provided between the intermediate bin (2) and the weight loss metering bin (3); Gas control valves (6) are installed on both the first gas pipeline (14) and the second gas pipeline (15).

5. A powder continuous metering system according to claim 4, characterized in that: A dust collector (7) is installed on the buffer bin (1).

6. A powder continuous metering system according to claim 5, characterized in that: The first gas pipeline (14) and the second gas pipeline (15) are both provided with dust collection pipelines, and the dust collection pipelines are connected to the dust collector (7) through a gas control valve (6).

7. A powder continuous metering system according to claim 4, characterized in that: A star-shaped discharge valve (9) is provided at the bottom of the weight loss metering bin (3).

8. A powder continuous metering system according to claim 7, characterized in that: The continuous metering system further comprises a controller, and the star-shaped discharge valve (9), the first weighing sensor (4), the second weighing sensor (10), the third weighing sensor (11) and the gas control valve (6) are all electrically connected to the controller.

9. A powder continuous metering system according to claim 4, characterized in that: The weight loss metering bin (3) is equipped with a stirring device (8) for stirring the powder.

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