A feeding device for caustic soda flake packaging

Abstract

This utility model relates to the technical field of caustic soda production and packaging equipment, specifically to a feeding device for caustic soda packaging. It includes a feeding hopper, a weighing hopper, and a switching component. The feeding hopper and weighing hopper are connected to form a coarse feeding channel. A fine feeding channel and an emergency discharge port are provided on both sides of the feeding hopper's outlet. A guide plate is provided between the fine feeding channel and the emergency discharge port. A spiral feeding component connected to the fine feeding channel and the emergency discharge port is provided on the guide plate. The switching component includes baffles oppositely arranged on both sides of the spiral feeding component. The baffles can be driven to engage or disengage with the guide plate, controlling the switching of the feeding accuracy of the spiral feeding component. This utility model can effectively control the weighing accuracy during the caustic soda packaging process, reducing the amount of caustic soda dust during feeding. In the event of equipment or component malfunction, it can promptly transport out any remaining caustic soda that has not yet been fed to the weighing hopper, providing timely emergency response time for fault repair and reducing caustic soda waste.

Description

Technical Field

[0001] This utility model relates to the technical field of caustic soda production and packaging equipment, specifically to a feeding device for caustic soda packaging. Background Technology

[0002] Sodium hydroxide flakes, also known as caustic soda, lye, or caustic alkali, require packaging after production. Most manufacturers use semi-automatic packaging machines for this process. The caustic soda flakes fall into a hopper, where a vibrator forces them down into a weighing scale. Once a certain weight is reached, the feeding valve is closed, stopping the vibration. This feeding method is relatively traditional. During vibration, the feeding speed is constant, making it difficult to control weighing accuracy. Furthermore, the vibration generates a lot of alkali dust, impacting the working environment and leading to a high equipment failure rate due to alkali dust corrosion.

[0003] In existing technologies, the final weight of caustic soda flakes in packages is controlled by using a screw feeder. However, during the initial feeding process, the inherent characteristics of caustic soda flakes—brittleness, moisture absorption, agglomeration, and poor flowability—mean that the screw feeder cannot apply significant pressure to the caustic soda flakes during material transport and control. During the feeding process, when the screw mechanism or other components malfunction and require maintenance, the existing device cannot promptly push the remaining caustic soda flakes out of the device. Although the remaining caustic soda flakes can be directly fed into the weighing hopper, this will cause the caustic soda flakes in the weighing hopper to be overweight as they have already been divided to the set packaging weight. The caustic soda flakes will need to be divided again, resulting in repetitive operations and low efficiency.

[0004] Therefore, there is an urgent need for a feeding device that can effectively control the weighing accuracy during the packaging process of caustic soda flakes, reduce the amount of caustic soda dust during feeding, and promptly transport out the remaining caustic soda flakes that have not yet been fed into the weighing hopper when equipment or components malfunction, thus providing timely emergency response time for fault repair and reducing the waste of caustic soda flakes. Utility Model Content

[0005] This utility model aims to provide a feeding device for caustic soda flake packaging, which can effectively control the weighing accuracy during the caustic soda flake packaging process, reduce the amount of caustic soda dust during feeding, and promptly transport out the remaining caustic soda flakes that have not yet been fed into the weighing hopper when the equipment or components malfunction, thus providing timely emergency response time for fault repair and reducing the waste of caustic soda flakes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: it includes a feeding hopper, a weighing hopper, and a switching assembly. The feeding hopper and the weighing hopper are connected to form a coarse feeding channel. A fine feeding channel and an emergency discharge port are provided on both sides of the feeding hopper outlet. A guide plate is provided between the fine feeding channel and the emergency discharge port. A spiral feeding component connected to the fine feeding channel and the emergency discharge port is provided on the guide plate. The switching assembly includes baffles disposed opposite to each other on both sides of the spiral feeding component. The baffles can be driven to fit or separate from the guide plate to control the switching between the fine feeding channel and the coarse feeding channel.

[0007] The beneficial effects of this solution are as follows: precise feeding through the screw feeder reduces the alkali dust problem caused by traditional vibrating feeding methods; the switchable feeding channel design enables the switching between fine and coarse feeding channels during the caustic soda flake packaging process; the baffles positioned on both sides of the screw feeder can more directly cut off the coarse feeding channel; and in the event of equipment failure, the baffles on both sides of the screw feeder can directly block the remaining material on the screw feeder, allowing the emergency discharge port to be activated to promptly discharge residual material, avoiding material accumulation and the problems of material waste and repeated weighing during maintenance.

[0008] Furthermore, the spiral feeder is provided with a rotating shaft, one end of which extends outward along the guide plate and is connected to a power source, which drives the rotating shaft to rotate in the forward or reverse direction.

[0009] Furthermore, the guide plate has an arc-shaped cross-section, with the center of the arc coinciding with the axis of the rotating shaft, and the two ends of the arc are used to fit against the baffle.

[0010] Furthermore, the baffle has a rotating part and a working part, the rotating part being rotatably disposed on the discharge port of the hopper and driving the working part to rotate.

[0011] Furthermore, as the working part rotates away from the guide plate, the discharge port of the hopper connects with the weighing hopper to form a coarse feeding channel; when the working part rotates towards the guide plate until it is in contact with the guide plate, the coarse feeding channel is disconnected, and the guide plate and the baffles on both sides of the spiral feeder form a guide channel connecting the emergency discharge port and the fine feeding channel.

[0012] Furthermore, the cross-section of the guide channel is V-shaped, with the guide plate at the bottom of the V-shape and baffles on both sides.

[0013] Furthermore, the emergency discharge port and the discharge port of the hopper are at a set distance on the guide channel.

[0014] Furthermore, when the working part of the baffle is attached to the guide plate, the baffle is tangent to both ends of the arc. Furthermore, the outlet of the fine feeding channel is equipped with a flap, which can be driven to open or close to control the connection between the outlet of the fine feeding channel and the weighing hopper.

[0015] Furthermore, the flap is located at the bottom of the guide plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure I ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure II ; The following detailed description illustrates the specific implementation method: Reference numerals: 1. Feeding hopper; 2. Weighing hopper; 3. Emergency discharge port; 4. Fine feeding channel; 5. Guide plate; 6. Screw feeder; 7. Rotating shaft; 8. Flip plate; 8' of the open state; 9. Baffle plate; 9' of the open state; 901. Rotating part; 902. Working part; 10. Guide channel; 11. Power source; 12. Coarse feeding channel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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.

[0019] The basic implementation examples are as follows: Figure 1-2As shown in the figure: This embodiment of a feeding device for caustic soda flake packaging includes a feeding hopper 1, a weighing hopper 2, and a switching component. The feeding hopper 1 and the weighing hopper 2 are connected to form a coarse feeding channel 12. A fine feeding channel 4 and an emergency discharge port 3 are provided on both sides of the discharge port of the feeding hopper 1. A guide plate 5 is provided between the fine feeding channel 4 and the emergency discharge port 3. A spiral feeding component 6 connected to the fine feeding channel 4 and the emergency discharge port 3 is provided on the guide plate 5. The switching component includes baffles 9 arranged opposite to each other on both sides of the spiral feeding component 6. The baffles 9 can be driven to fit or separate from the guide plate 5 to control the switching between the fine feeding channel 4 and the coarse feeding channel 12. The feeding hopper 1 is used to pour in the caustic soda flake material to be packaged. The spiral feeding component 6 provided on the guide plate 5 can adopt a single spiral or double spiral structure. The spacing of the spiral blades can be adjusted according to the actual feeding accuracy requirements, which will not be described in detail here. As the core actuator of the switching assembly, baffle 9 can reciprocate through linear drive devices such as cylinders, hydraulic cylinders, or electric push rods, or it can swing by using a rotary motor in conjunction with a linkage mechanism. When baffle 9 is in contact with guide plate 5, it forms a closed guide channel 10; when baffle 9 separates from guide plate 5 (the separation is illustrated in the diagram below), it moves in a circular motion. Figure 2 The baffle 9' in the open state (shown by the dotted line) allows materials to fall directly through the coarse feeding channel. The cross-sectional shape and size of the fine feeding channel 4 can be selected and designed according to the discharge capacity of the screw feeder 6. The setting height of the emergency discharge port 3 can be selected according to the convenience of receiving and cleaning materials during maintenance operations and emergency discharge.

[0020] The screw feeder 6 reduces the alkaline dust problem caused by traditional vibratory feeding methods. When the equipment malfunctions, the emergency discharge port 3 can be quickly activated by switching components to promptly discharge residual materials, avoiding material waste and repeated weighing during maintenance.

[0021] In this embodiment, the spiral feeder 6 is provided with a rotating shaft 7. One end of the rotating shaft 7 extends outward along the guide plate 5 and is connected to a power source 11. The power source 11 drives the rotating shaft 7 to rotate in the forward or reverse direction. Figure 1 As shown, one end of the rotating shaft 7 extends outward along the guide plate 5 to achieve mechanical connection with the external power source 11. This connection method can adopt common mechanical transmission structures such as couplings, pulleys or gear drives. The other end of the rotating shaft 7 can be equipped with a bearing support structure to cooperate with the operation. The power source 11 is preferably a motor that can rotate in both directions. As a preferred embodiment, the rotating shaft 7 and the screw feeder 6 can adopt an integral molding structure, or they can be fixedly connected by keyways or welding.

[0022] The bidirectional driveable rotating shaft structure enables bidirectional motion control of the screw feeder 6. When caustic soda is being fed normally, the forward rotation ensures accurate feeding. When equipment malfunctions and emergency discharge is required, the reverse rotation can quickly discharge residual material. This ensures accurate feeding under normal operating conditions and solves the problem of material cleaning during malfunctions. Compared with traditional unidirectional screw conveyor mechanisms, this offers greater operational flexibility and equipment reliability.

[0023] In this embodiment, the cross-section of the guide plate 5 is arc-shaped, the center of the arc coincides with the axis of the rotating shaft 7, and the two ends of the arc are used to fit against the baffle 9; Figure 2 As shown, the arc-shaped cross-section design of the guide plate 5 ensures that the screw feeder 6 maintains a uniform gap during rotation. The design of the arc's center coinciding with the axis of the rotating shaft 7 ensures a constant gap between the screw feeder 6 and the guide plate 5 during rotation. The structure where the arc ends fit against the baffles 9 forms a sealing structure to prevent material leakage. The arc-shaped structure ensures uniform force on the material during conveying, avoiding material breakage caused by excessive local pressure, making it suitable for precise feeding of fragile materials such as caustic soda flakes. The concentric design with the rotating shaft 7 ensures consistent conveying gaps and improves the stability of feeding accuracy. The sealing structure fitting against the baffles 9 also effectively reduces the generation of alkali dust, improving the working environment. This design reduces mechanical damage to the material while ensuring feeding accuracy. As a preferred embodiment, the arc radius of the guide plate 5 can be adjusted according to the material characteristics; for example, a larger radius can be used for easily sticky caustic soda flakes to reduce contact pressure. The guide plate 5 can be made of wear-resistant stainless steel, and its surface can be polished to reduce the coefficient of friction. The thickness of the guide plate 5 can be selected according to the structural strength requirements, which will not be elaborated here.

[0024] The baffle 9 has a rotating part and a working part. The rotating part is rotatably mounted on the discharge port of the hopper 1 and drives the working part to rotate. Figure 2 As shown, the rotating part is mounted on the side wall of the discharge port of the hopper 1 via a bearing or hinge structure, realizing rotational movement around a fixed axis. The working part is rigidly connected to the rotating part, which can be integrally formed or bolted; as a preferred embodiment, the rotating part is driven by an electric push rod or a pneumatic device, causing the working part to swing in a fan shape.

[0025] As the working part rotates away from the guide plate 5, the discharge port of the feeding hopper 1 connects with the weighing hopper 2 to form a coarse feeding channel; when the working part rotates towards the guide plate 5 until it is in contact with the guide plate 5, the coarse feeding channel is disconnected, and the guide plate 5 and the baffles 9 on both sides of the spiral feeder 6 form a guide channel 10 connecting the emergency discharge port 3 and the fine feeding channel 4; when the working part of the baffle 9 is in contact with the guide plate 5, the baffle 9 is tangent to both ends of the arc; the working part switches between the two working states by rotating. In the coarse feeding state, such as Figure 2 As shown, the working part is away from the guide plate 5, so that the discharge port of the feeding hopper 1 is directly connected to the weighing hopper 2 to form a coarse feeding channel, realizing rapid feeding. In the fine feeding state, as Figure 2 As shown, the working part is attached to the guide plate 5, and the coarse feeding channel is physically isolated. At the same time, it forms the guide channel 10 together with the guide plate 5. This design solves the problem that the existing technology cannot simultaneously meet the requirements of fast feeding and precise feeding. It can also cut off the coarse feeding channel in time when the equipment fails, thus avoiding material waste.

[0026] The guide channel 10 has a V-shaped cross-section, with the guide plate 5 at the bottom and baffles 9 on both sides. The guide channel 10 is composed of the guide plate 5 and the baffles 9. The V-shaped structure allows the caustic soda flakes to slide naturally along the inclined guide surface. The guide plate 5 at the bottom of the V-shape has an arc-shaped cross-section, with the center of the arc coinciding with the axis of rotation 7 of the screw feeder 6. When the working part of the baffle 9 is in contact with the guide plate 5, it remains tangent to both ends of the arc, thus forming a continuous guide surface. In a preferred embodiment, the arc of the guide plate 5 can be set to 120°–150°, and the contact angle between the baffle 9 and the guide plate 5 can be adjusted to 30°–45°. Furthermore, the opening width of the V-shaped channel can be selected according to the size of the discharge port of the hopper 1, which will not be elaborated further here. Through the design of the guide channel 10 with its specific geometry, the problem of material retention when the screw feeder 6 malfunctions is solved. When emergency discharge is required, the baffle 9 detaches from the guide plate 5 to form a coarse feeding channel. Simultaneously, the "V"-shaped structure ensures that residual caustic soda flakes can automatically slide down to the emergency discharge port 3 by gravity, preventing the accumulation of residual caustic soda flakes, improving equipment maintenance efficiency, and ensuring the reliability of material conveying in fault conditions. As a preferred embodiment, an elastic sealing strip can be provided at the edge of the working part of the baffle 9 to enhance the sealing effect during contact.

[0027] The emergency discharge port 3 and the discharge port of the hopper 1 are at a set distance on the guide channel 10. The set distance ensures that during normal feeding, no caustic soda flakes will accidentally enter the emergency discharge port 3 by splashing or other means under the action of the screw feeder 6, thus reducing unnecessary raw material loss. The specific parameters of the set distance can be determined according to the actual assembly space between each component and the rotation speed of the screw feeder 6, which will not be elaborated here.

[0028] The outlet of the fine feeding channel 4 is equipped with a flap 8, which can be driven to open or close to control the connection between the outlet of the fine feeding channel 4 and the weighing hopper 2. The flap 8 is located at the bottom of the guide plate 5. The flap 8 can be driven by an electric push rod, cylinder, or servo motor to achieve the opening and closing action, and its installation position is flush with the bottom of the guide plate 5 to avoid material accumulation. As a preferred embodiment, the flap 8 is connected to the bottom of the guide plate 5 through a hinge structure, and the driving mechanism drives the flap 8 to rotate around the hinge point through a linkage mechanism. Specifically, when the flap 8 is in the closed state, such as Figure 1 As shown, its working surface and the side wall of the fine feed channel 4 form a continuous sealing surface; when the flap 8 is in the open state (the opening is shown in the diagram), Figure 1 The dotted line indicates the open state of the flap 8. The flap 8 rotates downwards away from the side wall of the fine feed channel 4 to form the maximum opening angle, ensuring smooth material flow. The maximum opening angle can be determined according to the actual assembly space and the feeding amount of the fine feed channel 4, which will not be elaborated here. A flexible sealing strip can be set on the edge of the flap 8 to enhance the sealing performance in the closed state and prevent leakage of fine particles. When the weighing hopper 2 detects that the weight of the caustic soda flakes fed from the coarse feed channel is close to the preset packaging weight, the control baffle 9 closes to disconnect the coarse feed channel and open the flap 8. The caustic soda flakes are then transported to the fine feed channel 4 through the guide channel 10 formed by the baffle 9 and the guide plate 5.

[0029] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A feeding device for packaging caustic soda flakes, characterized in that: The device includes a feeding hopper, a weighing hopper, and a switching assembly. The feeding hopper and the weighing hopper are connected to form a coarse feeding channel. A fine feeding channel and an emergency discharge port are provided on both sides of the feeding hopper's discharge port. A guide plate is provided between the fine feeding channel and the emergency discharge port. A spiral feeder connected to the fine feeding channel and the emergency discharge port is provided on the guide plate. The switching assembly includes baffles that are oppositely arranged on both sides of the spiral feeder. The baffles can be driven to fit or separate from the guide plate to control the switching between the fine feeding channel and the coarse feeding channel.

2. The feeding device for caustic soda flake packaging according to claim 1, characterized in that: The spiral feeder is equipped with a rotating shaft. One end of the rotating shaft extends outward along the guide plate and is connected to a power source. The power source drives the rotating shaft to rotate in the forward or reverse direction.

3. A feeding device for caustic soda flake packaging according to claim 2, characterized in that: The guide plate has an arc-shaped cross-section, with the center of the arc coinciding with the axis of the rotating shaft, and the two ends of the arc are used to fit against the baffle.

4. A feeding device for caustic soda flake packaging according to claim 3, characterized in that: The baffle has a rotating part and a working part. The rotating part is rotatably mounted on the discharge port of the hopper and drives the working part to rotate.

5. A feeding device for caustic soda flake packaging according to claim 4, characterized in that: As the working part rotates away from the guide plate, the discharge port of the hopper connects with the weighing hopper to form the coarse feeding channel; when the working part rotates towards the guide plate until it is in contact with the guide plate, the coarse feeding channel is disconnected, and the guide plate and the baffles on both sides of the spiral feeder form a guide channel connecting the emergency discharge port and the fine feeding channel.

6. A feeding device for caustic soda flake packaging according to claim 5, characterized in that: The cross-section of the guide channel is "V" shaped, with the guide plate at the bottom and baffles on both sides.

7. A feeding device for caustic soda flake packaging according to claim 5, characterized in that: The emergency discharge port and the discharge port of the hopper are at a set distance on the guide channel.

8. A feeding device for caustic soda flake packaging according to claim 5, characterized in that: When the working part of the baffle is attached to the guide plate, the baffle is tangent to both ends of the arc.

9. A feeding device for caustic soda flake packaging according to claim 1, characterized in that: The outlet of the fine feeding channel is equipped with a flap, which can be driven to open or close to control the connection between the outlet of the fine feeding channel and the weighing hopper.

10. A feeding device for packaging caustic soda flakes according to claim 9, characterized in that: The flap is located at the bottom of the guide plate.

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