A screw metering device

Abstract

The utility model belongs to packaging equipment technical field discloses a kind of screw metering devices, it includes metering screw and distributing hopper, metering screw end is located in distributing hopper;It further includes lifting device, driving motor and material brush, material brush is fixedly connected with the output shaft of driving motor, and driving motor is fixedly connected with lifting device;Lifting device is used to drive driving motor and material brush to descend to the upside of metering screw outlet after metering screw reaches set weight and stops conveying;Driving motor is used to drive material brush to rotate after material brush descends, and the adhered material of upside of metering screw outlet is swept and falls into distributing hopper.The utility model screw metering device is equipped with material brush mechanism above distributing hopper, cooperates by lifting device and driving motor, after metering screw stops conveying, automatically sweeps and falls the adhered material of upside of its outlet, can guarantee that packaging product weight is consistent, avoid pollution, jam, improve production efficiency, and do not need to stop cleaning, satisfy continuous production requirement, and practicality is good.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a screw metering device. Background Technology

[0002] Screw metering devices, as core components for achieving accurate material metering and stable conveying, are widely used in automated packaging production lines in industries such as food, pharmaceuticals, and chemicals. Their structure typically includes key modules such as a hopper, metering motor, metering screw, and distribution hopper. The hopper temporarily stores the material to be metered; the metering motor drives the screw to rotate, and by precisely matching the screw pitch and rotation speed, the material conveying rate is controlled and pushed to the distribution hopper; the distribution hopper serves as a transition container, and its outlet is equipped with a receiving device to convey the material to the next process at a set flow rate.

[0003] Screw metering devices achieve closed-loop control of materials from storage to processing through the combined action of mechanical rotation and gravity, significantly improving packaging efficiency and metering accuracy. However, existing technologies still have significant shortcomings in practical applications: When conveying materials with poor flowability (such as powders with a certain moisture content, sticky granules, or easily agglomerated mixtures), the material often adheres to the upper side of the metering screw outlet. As the equipment operates continuously, this adhered material gradually accumulates, forming material bridges or clumps. This not only alters the effective volume of the distribution hopper, causing deviations between the actual and set values, but also affects the weight consistency of packaged products. If the adhered material may detach and carry over to the next process, it can also cause product contamination, equipment jamming, or even lead to production line shutdowns for maintenance. Traditional cleaning methods such as manual tapping and shutdown rinsing are inefficient and cannot meet the continuous requirements of modern packaging production. Utility Model Content

[0004] The purpose of this utility model is to provide a screw metering device with a simple structure and easy implementation, which not only ensures the consistency of the weight of packaged products, but also greatly improves production efficiency.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: A screw metering device includes a metering screw and a distributing hopper, with the end of the metering screw located inside the distributing hopper; it also includes a lifting device, a drive motor, and a material brush, with the material brush fixedly connected to the output shaft of the drive motor, and the drive motor fixedly connected to the lifting device. The lifting device is used to drive the drive motor and the material brush to descend to the upper side of the metering screw outlet after the metering screw reaches the set weight and stops conveying; the drive motor is used to drive the material brush to rotate after the material brush descends, sweeping the material adhering to the upper side of the metering screw outlet into the distribution hopper.

[0006] Furthermore, the brush includes a brush handle and a brush head, with the brush head fixed to the lower end of the brush handle and the upper end of the brush handle fixedly connected to the output shaft of the drive motor.

[0007] Furthermore, the brush head is made of nylon or silicone.

[0008] Furthermore, it also includes a mounting base for securing the lifting device.

[0009] Furthermore, the lifting device is a cylinder, and the drive motor is fixed at the end of the cylinder output shaft.

[0010] Furthermore, it also includes a hopper, a metering motor, and a receiving device. The two ends of the metering screw are connected to the metering motor and the distributing hopper, respectively. The hopper is located above the metering screw at the end closest to the metering motor and is connected to the metering screw.

[0011] Furthermore, it also includes a control device for controlling the working status of the metering motor, the lifting device, and the drive motor, and the metering motor, the lifting device, and the drive motor are all connected to the control device.

[0012] The beneficial effects of this utility model are as follows: The screw metering device of this utility model is equipped with a material brush mechanism above the distribution hopper. Through the cooperation of the lifting device and the drive motor, after the metering screw reaches the set weight and stops conveying, the material adhering to the upper side of the metering screw outlet is automatically swept into the distribution hopper. This effectively avoids the formation of material bridges or clumps at the metering screw outlet, thereby ensuring the weight consistency of packaged products. At the same time, it can also avoid product contamination or equipment jamming caused by adhering materials, greatly improving production efficiency. Compared with traditional cleaning methods, the device of this utility model has high cleaning efficiency, does not require machine shutdown for cleaning, and meets the continuous requirements of modern packaging production. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram showing the connection relationship of some components in this utility model.

[0015] In the diagram: 1. Metering screw; 2. Distributing hopper; 3. Lifting device; 4. Drive motor; 5. Material brush; 6. Fixed base; 7. Material bin; 8. Metering motor; 9. Receiving device; 10. Control device; 501. Brush handle; 502. Brush head. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1 As shown, a screw metering device includes a metering screw 1 and a distributing hopper 2, with the end of the metering screw 1 located inside the distributing hopper 2. It also includes a lifting device 3, a drive motor 4, and a material brush 5. The material brush 5 is fixedly connected to the output shaft of the drive motor 4, and the drive motor 4 is fixedly connected to the lifting device 3. The lifting device 3 is used to lower the drive motor 4 and the material brush 5 to the upper side of the outlet of the metering screw 1 after the metering screw 1 reaches a set weight and stops conveying. The drive motor 4 is used to drive the material brush 5 to rotate after it descends, sweeping the material adhering to the upper side of the outlet of the metering screw 1 into the distributing hopper 2. It also includes a hopper 7, a metering motor 8, and a receiving device 9. Both ends of the metering screw 1 are connected to the metering motor 8 and the distributing hopper 2, respectively. The hopper 7 is located above the metering screw 1 near the end close to the metering motor 8 and is connected to the metering screw 1.

[0018] The screw metering device of this utility model works on the same principle as existing screw metering devices, such as the working principle described in patent CN114906397A, entitled "Multi-row Horizontal Screw Metering Device". The main difference between this utility model and existing screw metering devices is that this utility model adds components such as a lifting device 3, a drive motor 4, and a material brush 5. However, the overall structure remains simple, easy to manufacture and install, reducing manufacturing costs and maintenance difficulty. In actual processing, the screw metering device of this utility model should be set on a processing platform (not shown in this utility model, but it represents a conventional setup in this field), and the processing platform is a common processing platform in this field, mainly serving a load-bearing function. Based on existing screw metering devices, improvements have been made. The main working process of this utility model is as follows: The material is first stored in hopper 7, which is located above and connected to the starting end of metering screw 1. Metering motor 8 drives metering screw 1 to rotate. By precisely matching the screw pitch with the rotation speed, the material conveying rate is controlled, and the material is pushed into distribution hopper 2. When metering screw 1 reaches the set weight and stops conveying, lifting device 3 starts working, driving drive motor 4 and material brush 5, which are fixed at the end of its output shaft, to descend to the outlet of metering screw 1. Subsequently, drive motor 4 drives material brush 5 to rotate, and the brush head 502 of material brush 5 sweeps the material adhering to the upper side of the outlet of metering screw 1 into distribution hopper 2, thereby avoiding material adhesion and accumulation. Distribution hopper 2 serves as a transition container, and its outlet is equipped with receiving device 9, which is used to convey the metered material to the next process according to the set flow rate, completing the accurate metering and stable conveying of materials.

[0019] This invention automatically cleans material adhering to the outlet of the metering screw 1, preventing changes in the effective volume of the distributing hopper 2 due to material accumulation. This ensures consistency between the actual and set measurement values, improving the weight consistency of packaged products. Simultaneously, timely cleaning prevents material from falling into the next process and potentially contaminating the product, avoiding equipment jamming and extending the equipment's lifespan. Compared to traditional cleaning methods such as manual tapping and machine shutdown for rinsing, this invention achieves online automatic cleaning, completing the cleaning work without stopping the machine, significantly improving production efficiency and meeting the continuous requirements of modern packaging production.

[0020] In this invention, the lifting device 3 is a cylinder, and the drive motor 4 is fixed to the end of the cylinder output shaft. The cylinder drives the cylinder piston to perform linear reciprocating motion by controlling the entry and exit of compressed air. Since the drive motor 4 is fixed on the cylinder output shaft, the linear motion of the cylinder piston is converted into the vertical lifting motion of the drive motor 4 and the material brush 5.

[0021] In practical design, to ensure the stability of the lifting device 3, a fixed base 6 is also included. This fixed base is mounted on an external processing platform (i.e., the processing platform used to fix the screw metering device) to secure the lifting device 3. The fixed base 6, as a mechanical support component, is rigidly connected to the processing platform or equipment frame via bolts or welding to form a stable mounting base. The cylinder sidewall is fixedly connected to the fixed base 6, ensuring that the output shaft is located at the lower end. This ensures that the cylinder piston only produces linear displacement along the axial direction during movement, avoiding lateral offset or vibration caused by unstable installation.

[0022] In this invention, the material brush 5 includes a brush handle 501 and a brush head 502. The brush head 502 is fixed to the lower end of the brush handle 501, and the upper end of the brush handle 501 is fixedly connected to the output shaft of the drive motor 4. The fixed connection between the upper end of the brush handle 501 and the output shaft of the drive motor 4 allows the drive motor 4 to directly control the rotation of the material brush 5. When the drive motor 4 starts, its rotational force is transmitted to the brush head 502 through the brush handle 501. The brush head 502, fixed to the lower end of the brush handle 501, is the part that directly contacts the material adhering to the outlet of the metering screw 1. During rotation, the brush head 502 can effectively sweep away the material adhering to the upper side of the outlet of the metering screw 1 without rapidly wearing down or breaking due to friction with the screw or material.

[0023] The brush head 502 in this invention is made of nylon or silicone, or other materials that are wear-resistant, elastic, and not easily broken. The brush handle 501, as a key component connecting the output shaft of the drive motor 4 and the brush head 502, requires careful consideration of factors such as strength, rigidity, wear resistance, corrosion resistance, and cost when selecting its material. In practice, the brush handle 501 can be made of materials such as stainless steel or aluminum alloy.

[0024] like Figure 2 As shown, this invention also includes a control device 10 for controlling the operating states of the metering motor 8, the lifting device 3, and the drive motor 4. All three motors are connected to the control device 10. The control device 10 is a common device in the art, such as a programmable logic controller (PLC) or a microcontroller control system. It coordinates the timing of the actions of the metering motor 8, the lifting device 3, and the drive motor 4 through a preset program or external signals. This process is conventional in the art and can be routinely implemented by those skilled in the art. Furthermore, the main improvement of this invention lies in the improvement of its structure and connection relationships, not in the control method or software algorithm.

[0025] The overall linkage process of the various components in this utility model is as follows: Once the metering screw 1 reaches the set weight and stops conveying, the control device 10 sends a signal to the lifting device 3, causing its piston to extend and lower the drive motor 4 and the material brush 5 to the outlet of the metering screw 1. Subsequently, the drive motor 4 starts, rotating the material brush 5 to sweep the material adhering to the upper side of the metering screw 1 outlet into the distribution hopper 2. After cleaning, the cylinder piston retracts, raising the drive motor 4 and the material brush 5 to their initial position, awaiting the next cleaning command.

[0026] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. A screw metering device, characterized in that, It includes a metering screw (1) and a distributing hopper (2), with the end of the metering screw (1) located inside the distributing hopper (2); it also includes a lifting device (3), a drive motor (4) and a material brush (5), with the material brush (5) fixedly connected to the output shaft of the drive motor (4), and the drive motor (4) fixedly connected to the lifting device (3); The lifting device (3) is used to drive the drive motor (4) and the material brush (5) to descend to the upper side of the outlet of the metering screw (1) after the metering screw (1) reaches the set weight and stops conveying; the drive motor (4) is used to drive the material brush (5) to rotate after the material brush (5) descends, and sweep the material adhering to the upper side of the outlet of the metering screw (1) into the distribution hopper (2).

2. The screw metering device of claim 1, wherein, The material brush (5) includes a brush handle (501) and a brush head (502). The brush head (502) is fixed at the lower end of the brush handle (501), and the upper end of the brush handle (501) is fixedly connected to the output shaft of the drive motor (4).

3. The screw metering device of claim 2, wherein, The brush head (502) is made of nylon or silicone.

4. The screw metering device of claim 1, 2 or 3, characterized in that It also includes a mounting base (6) for fixing the lifting device (3).

5. The screw metering device of claim 1, 2 or 3, wherein, The lifting device (3) is a cylinder, and the drive motor (4) is fixed at the end of the cylinder output shaft.

6. The screw metering device of claim 4, wherein, The lifting device (3) is a cylinder, and the drive motor (4) is fixed at the end of the cylinder output shaft.

7. The screw metering device of claim 1, 2, 3, or 6, wherein, It also includes a hopper (7), a metering motor (8) and a receiving device (9). The two ends of the metering screw (1) are connected to the metering motor (8) and the distributing hopper (2) respectively. The hopper (7) is located above the metering screw (1) at the end closest to the metering motor (8) and is connected to the metering screw (1).

8. The screw metering device of claim 7, wherein, It also includes a control device (10) for controlling the working status of the metering motor (8), the lifting device (3) and the drive motor (4), and the metering motor (8), the lifting device (3) and the drive motor (4) are all connected to the control device (10).

Images