Weighing type discharging mechanism

Abstract

The utility model discloses a weighing type discharging mechanism which comprises a fixing support, a discharging control valve assembly, a scale hopper assembly and a discharging hopper assembly. The discharging control valve assembly, the scale hopper assembly and the discharging hopper assembly are installed on the fixing support. The discharging control valve assembly comprises a valve body, at least two discharging openings are formed in the bottom of the valve body, each discharging opening is provided with a discharging opening control assembly, and the size of the corresponding discharging opening is controlled step by step through each discharging opening control assembly; the scale hopper assembly is located below the discharging opening and used for receiving and weighing materials discharged from the discharging opening, and a discharging opening assembly is arranged at the bottom of the scale hopper assembly. The discharging hopper assembly is located below the discharging opening assembly and used for being in butt joint with packaging bags. According to the utility model, the design structure of a plurality of feed openings is adopted, and the feed openings are controlled step by step, so that the overall feed flow of materials is adjustable, the structure can finely adjust the flow rate of the materials according to the weighing progress, the combination of rapid feeding and slow correction is realized, the weighing precision is improved, and the overshoot phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automatic packaging equipment, and more specifically, to a weighing-type feeding mechanism. Background Technology

[0002] In modern production processes, automated quantitative material feeding is an indispensable key link in large packaging equipment, especially in industries such as chemicals, feed, fertilizers, grains, and building materials. For granular and free-flowing materials, the feeding and metering process typically requires rapid, stable, and accurate completion. Existing domestic large packaging equipment generally employs mechanical or electrically controlled feeding mechanisms. Common structural forms include vibratory feeding, screw conveyors, and gravity feeding combined with electric or pneumatic valve control. Among these, the conventional gravity feeding mechanism is widely used due to its simple structure and low cost. It usually consists of a storage hopper, a feeding port, a closing gate (usually a single-switch structure), and a metering hopper. The closing gate often uses a servo motor or cylinder as the drive actuator to control whether the material falls into the weighing hopper. When the set weight is reached, the system controls the closing gate to close, thus completing one quantitative weighing cycle.

[0003] In existing technologies, such as the fully automatic double-weighing hopper granular material packaging machine disclosed in CN107867455A, a three-stroke cylinder controls a symmetrical measuring hopper with an arc-shaped valve at the bottom of the feeding hopper to feed material in three stages: fast, medium, and slow. However, controlling an arc-shaped valve with a three-stroke cylinder is prone to "overshooting" due to mechanical response delay and feeding inertia, meaning the material exceeds the set weight, affecting weighing accuracy, and also resulting in a high failure rate and increased maintenance costs.

[0004] Therefore, it is necessary to provide a weighing-type feeding mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a weighing-type feeding mechanism that overcomes the aforementioned defects in the prior art.

[0006] The technical solution to achieve the purpose of this utility model is: a weighing-type feeding mechanism, including a fixed bracket and a feeding control valve assembly, a weighing hopper assembly, and a feeding hopper assembly installed on the fixed bracket; the feeding control valve assembly includes a valve body, the bottom of which is provided with no less than two feeding ports, each feeding port is provided with a feeding port control assembly, and the size of the corresponding feeding port is controlled step by step through each feeding port control assembly; the weighing hopper assembly is located below the feeding ports and is used to receive and weigh the material discharged from the feeding ports, and the bottom of the weighing hopper assembly is provided with a discharge port assembly; the feeding hopper assembly is located below the discharge port assembly and is used to connect to packaging bags.

[0007] Furthermore, the bottom of the feeding control valve assembly is provided with a first feeding port and a second feeding port.

[0008] Furthermore, the first discharge port is provided with a first discharge port control component, which includes a first cylinder and a first arc-shaped door. The first arc-shaped door is rotatably mounted on the valve body and adapted to the first discharge port. The output end of the first cylinder is connected to the first arc-shaped door through a first connecting rod.

[0009] Furthermore, a second discharge port control component is provided corresponding to the second discharge port. The second discharge port control component includes a second cylinder and a second arc-shaped door. The second arc-shaped door is rotatably mounted on the valve body and adapted to the second discharge port. The output end of the second cylinder is connected to the second arc-shaped door through a second connecting rod.

[0010] Furthermore, the first cylinder is a single-stroke cylinder, and the second cylinder is a double-stroke cylinder.

[0011] Furthermore, the second arc-shaped door is provided with a material discharge hole.

[0012] Furthermore, the weighing hopper assembly also includes a weighing sensor, which is fixed on the fixed bracket and used to measure the weight of the material falling into the weighing hopper assembly.

[0013] Furthermore, the discharge port assembly includes a third cylinder and a discharge gate, wherein the third cylinder is connected to the discharge gate via a third connecting rod.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects:

[0015] (1) This utility model adopts a multi-feed port design structure, and controls each feeding port in steps, so that the overall material feeding flow rate is adjustable. This structure can finely adjust the material flow rate according to the weighing progress, realize the combination of fast feeding and slow correction, improve the weighing accuracy, and avoid the occurrence of overshoot. Each feeding port corresponds to a feeding port control component. Compared with the prior art, it improves the stability of the equipment, reduces the failure rate, and makes the maintenance cost lower.

[0016] (2) This utility model controls the opening degree of the closing gate by segmenting the cylinder, realizing three stages: "large opening for fast feeding", "medium opening for stable feeding" and "small opening for precise feeding", providing high-precision adjustment capability for controlling material flow rate and flow rate; through multi-stage flow control design, it can first use large opening for fast feeding, and switch to small opening for micro-feeding when it approaches the target value, which greatly shortens the single weighing cycle and improves the overall packaging efficiency, and is particularly suitable for large-volume, continuous production requirements.

[0017] (3) This utility model realizes real-time monitoring of material weight by setting a weighing sensor on the weighing hopper assembly. The system judges and controls the opening and closing position of the material gate according to the weight change.

[0018] (4) This utility model optimizes the structure for the characteristics of granular materials with good flowability. It can achieve high efficiency and high precision feeding without the need for complex stirring or vibration devices. While simplifying the overall structure, it significantly improves the reliability of system operation. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is a diagram showing the internal structure of the material feeding control valve assembly.

[0022] Figure 3 This is another view of the internal structure of the feed control valve assembly.

[0023] Figure 4 This is another view of the internal structure of the feed control valve assembly.

[0024] Figure 5 This is a 3D view of the weighing bucket assembly.

[0025] The labels in the attached diagram are as follows: 1. Fixed bracket; 2. Feeding control valve assembly; 2-1. Valve body; 2-2. First feeding port; 2-3. First feeding port control assembly; 2-3-1. First cylinder; 2-3-2. First arc-shaped gate; 2-3-3. First connecting rod; 2-4. Second feeding port; 2-5. Second feeding port control assembly; 2-5-1. Second cylinder; 2-5-2. Second arc-shaped gate; 2-5-3. Second connecting rod; 2-5-4. Feeding hole; 3. Weighing hopper assembly; 3-1. Discharge port assembly; 3-1-1. Third cylinder; 3-1-2. Discharge gate; 3-1-3. Third connecting rod; 3-2. Weighing sensor; 4. Feeding hopper assembly. Detailed Implementation

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] 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 with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0031] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0032] (Example 1)

[0033] See Figures 1 to 4A weighing-type feeding mechanism includes a fixed bracket 1 and a feeding control valve assembly 2, a weighing hopper assembly 3, and a feeding hopper assembly 4 mounted on the fixed bracket 1. The feeding control valve assembly 2 is fixed to the top of the fixed bracket 1, the feeding hopper assembly 4 is fixed to the bottom of the fixed bracket 1, and the weighing hopper assembly 3 is located between the feeding control valve assembly 2 and the feeding hopper assembly 4.

[0034] The feeding control valve assembly 2 includes a valve body 2-1, with a first feeding port 2-2 and a second feeding port 2-4 at the bottom of the valve body 2-1. The valve body 2-1 is also equipped with a first feeding port control assembly 2-3 and a second feeding port control assembly 2-5.

[0035] The first discharge port control component 2-3 includes a first cylinder 2-3-1 and a first arc-shaped door 2-3-2. The first arc-shaped door 2-3-2 is rotatably mounted on the valve body 2-1 and is adapted to the first discharge port 2-2. The output end of the first cylinder 2-3-1 is connected to the first arc-shaped door 2-3-2 through the first connecting rod 2-3-3. The first cylinder 2-3-1 is a single-stroke cylinder.

[0036] The second discharge port 2-4 is provided with a second discharge port control component 2-5. The second discharge port control component 2-5 includes a second cylinder 2-5-1 and a second arc-shaped door 2-5-2. The second arc-shaped door 2-5-2 is rotatably mounted on the valve body 2-1 and is adapted to the second discharge port 2-4. The output end of the second cylinder 2-5-1 is connected to the second arc-shaped door 2-5-2 through the second connecting rod 2-5-3. The second cylinder 2-5-1 is a double-stroke cylinder. The second arc-shaped door 2-5-2 is provided with a discharge hole 2-5-4.

[0037] This mechanism controls the state of the corresponding discharge port in stages through the first cylinder 2-3-1 and the second cylinder 2-5-1, respectively realizing four stages: "large opening for rapid material discharge", "medium opening for stable speed material discharge", "small opening for precise material replenishment" and "complete closure", providing high-precision adjustment capability for controlling material flow rate and volume.

[0038] See Figure 5 The weighing hopper assembly 3 is located below the discharge port and is used to receive and weigh the material discharged from the discharge port. The bottom of the weighing hopper assembly 3 is provided with a discharge port assembly 3-1. The discharge port assembly 3-1 includes a third cylinder 3-1-1 and a discharge gate 3-1-2. The third cylinder 3-1-1 is connected to the discharge gate 3-1-2 via a third connecting rod 3-1-3. The weighing hopper assembly 3 also includes a weighing sensor 3-2, which is fixed on a fixed bracket 1 and used to measure the weight of the material falling into the weighing hopper assembly 3 in real time. The discharge hopper assembly 4 is located below the discharge port assembly 3-1 and is used to connect to packaging bags.

[0039] In this embodiment, the mechanism is used in conjunction with the packaging machine. The feeding control valve assembly 2 in this patent mechanism is connected to the upstream material conveying pipeline. The material is conveyed to the feeding control valve assembly 2 through the conveying pipeline. Under the real-time material flow control of the feeding control valve assembly 2, the material gradually flows into the weighing hopper assembly 3. The weighing sensor in the weighing hopper assembly 3 reads the weight of the material in real time.

[0040] The first stage of material filling: the first discharge port 2-2 and the second discharge port 2-4 are both opened, and the material flows down at full speed.

[0041] The second stage of material filling: When the weight of the material in the weighing hopper assembly 3 is close to 80%-85% of the preset value, the first discharge port control assembly 2-3 closes the first discharge port 2-2.

[0042] The third stage of material filling: When the weight of the material in the weighing hopper assembly 3 is close to 95% of the preset value, the second discharge port control assembly 2-5 drives the second arc-shaped gate 2-5-2 to the first state, and the second discharge port 2-4 leaves only the discharge hole 2-5-4 to continue discharging material.

[0043] The fourth stage of material filling: When the weight of the material in the weighing hopper assembly 3 is close to the preset value, the second discharge port control assembly 2-5 drives the second arc-shaped door 2-5-2 to completely close the second discharge port 2-4. The material falling through the conveying pipe is blocked in the chamber of the discharge control valve assembly 2. Subsequently, the material cannot flow into the weighing hopper assembly 3 to ensure that the material in the weighing hopper is at the target set weight and within the dosage error range.

[0044] The cylinder of the weighing hopper assembly 3 drives the closing gate to open the discharge gate, and all the material flows into the feeding hopper assembly 4; the feeding hopper assembly 4 connects to the feeding port of the packaging machine, and the material is filled into the packaging container each time it is fed by the packaging machine equipment, becoming the finished product to be transferred.

[0045] This embodiment employs a dual-discharge port design, with step-by-step control of each port, allowing for adjustable overall material flow rate. This structure can finely adjust the material flow rate according to the weighing progress, combining rapid feeding with slow correction to improve weighing accuracy and prevent overshoot. Each discharge port corresponds to a discharge port control component, which, compared to existing technologies, improves equipment stability, reduces failure rate, and lowers maintenance costs. The structure is optimized for the characteristics of free-flowing granular materials, eliminating the need for complex stirring or vibration devices, achieving high-efficiency and high-precision feeding, simplifying the overall structure while significantly improving system reliability.

[0046] 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 descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A weighing-type feeding mechanism, characterized in that: The system includes a fixed bracket (1) and a feeding control valve assembly (2), a weighing hopper assembly (3), and a feeding hopper assembly (4) mounted on the fixed bracket (1). The feeding control valve assembly (2) includes a valve body (2-1), the bottom of which is provided with at least two feeding ports. Each feeding port is provided with a feeding port control assembly, and the state of the corresponding feeding port is controlled step by step through each feeding port control assembly. The weighing hopper assembly (3) is located below the feeding ports and is used to receive and weigh the material discharged from the feeding ports. The bottom of the weighing hopper assembly (3) is provided with a discharge port assembly (3-1). The feeding hopper assembly (4) is located below the discharge port assembly (3-1) and is used to connect to packaging bags.

2. The weighing-type feeding mechanism according to claim 1, characterized in that: The bottom of the feeding control valve assembly (2) is provided with a first feeding port (2-2) and a second feeding port (2-4).

3. The weighing-type feeding mechanism according to claim 2, characterized in that: The first discharge port (2-2) is provided with a first discharge port control component (2-3). The first discharge port control component (2-3) includes a first cylinder (2-3-1) and a first arc-shaped door (2-3-2). The first arc-shaped door (2-3-2) is rotatably mounted on the valve body (2-1) and adapted to the first discharge port (2-2). The output end of the first cylinder (2-3-1) is connected to the first arc-shaped door (2-3-2) through the first connecting rod (2-3-3).

4. The weighing-type feeding mechanism according to claim 3, characterized in that: The second discharge port (2-4) is provided with a second discharge port control component (2-5). The second discharge port control component (2-5) includes a second cylinder (2-5-1) and a second arc-shaped door (2-5-2). The second arc-shaped door (2-5-2) is rotatably mounted on the valve body (2-1) and adapted to the second discharge port (2-4). The output end of the second cylinder (2-5-1) is connected to the second arc-shaped door (2-5-2) through a second connecting rod (2-5-3).

5. A weighing-type feeding mechanism according to claim 4, characterized in that: The first cylinder (2-3-1) is a single-stroke cylinder, and the second cylinder (2-5-1) is a double-stroke cylinder.

6. A weighing-type feeding mechanism according to claim 5, characterized in that: The second arc-shaped door (2-5-2) is provided with a material discharge hole (2-5-4).

7. A weighing-type feeding mechanism according to claim 1, characterized in that: The weighing hopper assembly (3) also includes a weighing sensor (3-2), which is fixed on the fixed bracket (1) and is used to measure the weight of the material falling into the weighing hopper assembly (3).

8. A weighing-type feeding mechanism according to claim 7, characterized in that: The discharge port assembly (3-1) includes a third cylinder (3-1-1) and a discharge gate (3-1-2). The third cylinder (3-1-1) is connected to the discharge gate (3-1-2) via a third connecting rod (3-1-3).

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