Stable feeding loss-in-weight scale with air flow anti-blocking structure

Abstract

The utility model discloses a kind of stable feed loss weight scales with airflow anti-blocking structure, it is related to the technical field of loss weight scale, including support frame, conveying pipe and hopper, the upper portion of support frame is equipped with weighing sensor, the upper surface left side of support plate is equipped with side plate, the right side of conveying pipe is equipped with downcomer, the lower side wall of hopper is equipped with flow-aiding air disc;The lower side of downcomer is sleeved with transition pipe, the upper surface left and right sides of limiting ring are both equipped with threaded rod.This stable feed loss weight scale with airflow anti-blocking structure, by stirring subassembly, cooperate with the multiple flow-aiding air disc of outer wall and form double anti-blocking structure: stirring subassembly can disperse caking material, flow-aiding air disc synchronous generation blow and vibration, loosen inner wall adhering material, avoid blockage;Double effect substantially reduces stop dredging frequency, ensure that material continuously falls into conveying pipe, cooperate with the conveying auger driven by conveying motor and stabilize feeding, satisfy continuous production demand.

Description

Technical Field

[0001] This utility model relates to the field of loss-in-weight scale technology, specifically a stable feeding loss-in-weight scale with an airflow anti-blockage structure. Background Technology

[0002] A loss-in-weight weigher is a metering device based on the principle of weight measurement to achieve continuous and precise feeding. It is widely used in industries such as chemical, building materials, food, and pharmaceuticals. Its core function is to stably transport powders, granules, or small lumps from storage silos to subsequent production processes at a preset flow rate. Simultaneously, it monitors and provides real-time feedback on the instantaneous flow rate and cumulative consumption of materials. It is a key piece of equipment for ensuring the accuracy of material proportioning in the production process and improving the consistency of product quality. For example, in concrete mixing plants, loss-in-weight weighers can precisely control the amount of fly ash and mineral powder added; in food production lines, they can achieve quantitative feeding of flour and additives.

[0003] The working principle of a loss-in-weight scale is based on "weight difference" measurement: the equipment typically consists of a weighing hopper, a feeding mechanism, a load cell, and a control system. During operation, the load cell continuously monitors the total weight of the hopper and the material inside. The control system calculates the weight change per unit time, i.e., the "loss rate," and deduces the actual feed flow rate of the material. This flow rate is then compared with the set flow rate, and the operating parameters of the feeding mechanism are adjusted in real time to achieve closed-loop control and ensure the stability of the feed flow rate.

[0004] For example, Chinese utility model patent application number 202021529221.5 discloses a loss-in-weight scale for laundry detergent batching. The electronic scale collects flow data in real time and sends it to an external weighing controller for processing, thereby adjusting the material outflow in real time. The system controls the feeding device in the raw material supply silo to start feeding. Simultaneously, the loss-in-weight scale operates in a precise volume mode to ensure stable and accurate flow. Through the repetitive operation of these steps, the loss-in-weight scale can continuously and accurately feed materials. However, this device still has certain shortcomings. The lack of an anti-clogging mechanism and the difficulty in disassembling and cleaning the discharge position will cause frequent blockages in the hopper when the loss-in-weight scale processes materials, requiring manual unblocking and severely impacting production efficiency. At the same time, the residual material at the discharge position is difficult to completely remove, and cross-contamination is likely to occur when changing materials, which does not meet the cleanliness standards of the food, pharmaceutical and other industries.

[0005] Therefore, we propose a stable feed loss-in-weight scale with an airflow anti-blocking structure to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this utility model is to provide a stable feeding loss-in-weight scale with an airflow anti-blocking structure to solve the problems mentioned in the background art. Currently, loss-in-weight scales on the market do not have anti-blocking mechanisms and are not easy to disassemble and clean at the discharge position. This leads to frequent blockages in the hopper when the loss-in-weight scale processes materials, requiring machine shutdown and manual unblocking, which seriously affects production efficiency. At the same time, the residual material at the discharge position is difficult to completely remove, and cross-contamination is easily generated when changing materials, which does not meet the cleanliness standards of the food, pharmaceutical and other industries.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a stable feeding loss-in-weight scale with an airflow anti-blocking structure, comprising a support frame, a conveying pipe, and a hopper. A weighing sensor is installed above the support frame, and a support plate is installed above the weighing sensor. A side plate is installed on the left side of the upper surface of the support plate, and a conveying pipe is installed on the right side of the side plate. A hopper is installed on the right side of the conveying pipe, and a flow-aiding air disc is installed on the lower side wall of the hopper. A stirring assembly is installed inside the hopper. A transition tube is sleeved below the feed tube, and a limit ring is installed below the transition tube. Threaded rods are installed on both the left and right sides of the upper surface of the limit ring.

[0008] Preferably, a conveying auger is installed inside the conveying pipe, a conveying motor is installed on the left side of the side plate, the right side of the conveying motor is connected to the conveying auger through an output shaft, and the right side of the conveying pipe is connected to the inside of the discharge pipe.

[0009] With the above structural design, after the conveyor motor starts, it drives the conveyor auger to rotate through the output shaft; the conveyor auger pushes the material in the conveying pipe to the right. Because the conveying pipe is connected to the discharge pipe, the material can smoothly enter the discharge pipe and be output, realizing continuous and stable material conveying. With the help of the weighing sensor, the feeding flow rate can be accurately controlled.

[0010] Preferably, a connecting frame is connected above the conveying pipe, and the connecting frame is connected to the discharge hopper.

[0011] With the above structural design, after the material in the hopper is stirred and prevented from clogging, it can fall evenly into the conveying pipe through the connecting frame.

[0012] Preferably, multiple flow-aiding air discs are provided, and the flow-aiding air discs are connected to the pulse solenoid valve.

[0013] With the above structural design, the pulse solenoid valve can control the working state of the flow-aiding air disc; when the flow-aiding air disc is working, it generates blowing and vibration actions simultaneously. Blowing can loosen the material attached to the inner wall of the hopper, and vibration can break the material bridging structure. The dual action prevents the material from blocking the falling channel, ensures the continuous and stable falling of the material, and reduces the frequency of downtime for cleaning.

[0014] Preferably, the upper surface of the hopper is equipped with a stirring motor and a feed inlet, and the lower part of the stirring motor is connected to the stirring assembly via an output shaft.

[0015] With the above structural design, after the stirring motor is started, it drives the stirring component to rotate in the hopper through the output shaft. The stirring component stirs the material, which can disperse lumpy material and break up bridging. With the help of the flow-aiding air disc, the anti-clogging effect is further improved. At the same time, the feed inlet is used to replenish the material into the hopper to ensure that the feeding process is continuous and uninterrupted.

[0016] Preferably, the hopper is equipped with a spiral stirring mechanism, the upper end of which is connected to the output shaft of the stirring motor.

[0017] With the above structural design, the stirring motor drives the spiral stirring mechanism to rotate. When the spiral stirring mechanism rotates, it can not only stir the material, but also generate downward vertical pressure to push the material to the bottom of the hopper, effectively breaking the bridging phenomenon caused by the poor flowability of the material and ensuring that the material falls smoothly into the connecting frame.

[0018] Preferably, the outer wall of the transition tube is in close contact with the inner wall of the feed tube, and the upper end of the transition tube is designed with an opening. The inner wall of the opening is designed with an arc-shaped structure. A limit nut is installed on the threaded rod. Connecting plates are installed on both the left and right sides of the feed tube, and limit holes are opened on the connecting plates. The center line of the limit hole coincides with the center line of the threaded rod.

[0019] The above structural design ensures no leakage during material conveying. The threaded rod passes through the limiting holes of the connecting plates on both sides of the feed pipe. The transition pipe is fixed to the feed pipe by tightening the limiting nut. When cleaning is required, the limiting nut is unscrewed to remove the transition pipe from the feed pipe, thoroughly clean the residual material, avoid cross-contamination when changing materials, and meet clean production standards.

[0020] Compared with the prior art, the beneficial effects of this utility model are: the stable feed loss-in-weight scale with airflow anti-blockage structure: 1. Dual anti-clogging mechanism of "stirring + airflow" ensures continuous and stable feeding. The mixing component, together with multiple air-assisted discs on the outer wall, forms a dual anti-clogging structure: the mixing component can disperse agglomerated materials, and the air-assisted discs simultaneously generate air blowing and vibration to loosen the materials attached to the inner wall and avoid blockage; the dual effect greatly reduces the frequency of downtime for unblocking, ensuring that materials continuously fall into the conveying pipe, and with the stable feeding of the conveying auger driven by the conveying motor, it meets the needs of continuous production. 2. The discharge component is detachable and cleanable, conforming to clean production standards. The feed pipe and the transition pipe are quickly connected by a threaded rod, a limit nut, and a limit hole in the connecting plate. The transition pipe can be removed by unscrewing the limit nut, and the residual material inside the feed pipe and the transition pipe can be thoroughly cleaned. The arc-shaped opening at the upper end of the transition pipe can also prevent the accumulation of material residue, effectively preventing cross-contamination when changing materials. It meets the stringent cleanliness requirements of the food, pharmaceutical and other industries, while reducing maintenance difficulty and improving the practicality of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of this utility model; Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the position and structure of the airflow-aiding disc of this utility model; Figure 4 This is a schematic diagram of the internal structure of the hopper of this utility model; Figure 5 This is a schematic diagram of the structure of the transition tube of this utility model during disassembly; Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0022] In the diagram: 1. Support frame; 2. Weighing sensor; 3. Support plate; 4. Side plate; 5. Conveying pipe; 6. Discharge pipe; 7. Conveying motor; 8. Connecting frame; 9. Discharge hopper; 10. Flow-aiding air disc; 11. Mixing assembly; 12. Spiral mixing mechanism; 13. Mixing motor; 14. Feed inlet; 15. Transition pipe; 16. Limiting ring; 17. Threaded rod; 18. Limiting nut; 19. Connecting plate; 20. Limiting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0024] Please see Figures 1-5This utility model provides a technical solution: a stable feeding loss-in-weight scale with an airflow anti-blocking structure, including a support frame 1, a weighing sensor 2, a support plate 3, a side plate 4, a conveying pipe 5, a discharge pipe 6, a conveying motor 7, a connecting frame 8, a discharge hopper 9, an airflow-aiding disc 10, a stirring assembly 11, a stirring motor 13, a feed inlet 14, a transition pipe 15, a limiting ring 16, a threaded rod 17, a limiting nut 18, a connecting plate 19, and a limiting hole 20. The weighing sensor 2 is installed above the support frame 1, and the support plate 3 is installed above the weighing sensor 2. The side plate 4 is installed on the left side of the upper surface of the support plate 3. A conveying pipe 5 is installed on the right side of the conveying pipe 5, and a discharge pipe 6 is installed on the right side of the conveying pipe 5. A conveying auger is installed inside the conveying pipe 5. A conveying motor 7 is installed on the left side of the side plate 4. The right side of the conveying motor 7 is connected to the conveying auger through an output shaft. The right side of the conveying pipe 5 is connected to the inside of the discharge pipe 6. After the conveying motor 7 starts, it drives the conveying auger to rotate through the output shaft. The conveying auger pushes the material in the conveying pipe 5 to the right. Because the conveying pipe 5 and the discharge pipe 6 are connected, the material can smoothly enter the discharge pipe 6 and be output, realizing continuous and stable material conveying. With the help of the weighing sensor 2, the feeding flow rate can be accurately controlled. A connecting frame 8 is connected above the material in the hopper 9, and the connecting frame 8 is connected to the material in the hopper 9. After the material in the hopper 9 is stirred and prevented from clogging, it can fall evenly into the conveying pipe 5 through the connecting frame 8. The material in the hopper 9 is located above the conveying pipe 5. Multiple flow-aiding air discs 10 are installed on the lower side wall of the material in the hopper 9. The flow-aiding air discs 10 are connected to a pulse solenoid valve, which can control the working state of the flow-aiding air discs 10. When the flow-aiding air discs 10 are working, they simultaneously generate blowing and vibration actions. The blowing can loosen the material attached to the inner wall of the hopper 9, and the vibration can break the material bridging structure. This dual action prevents the material from clogging. The falling channel ensures a continuous and stable descent of materials, reducing the frequency of downtime for unblocking. The hopper 9 is equipped with a stirring assembly 11. A stirring motor 13 and a feed inlet 14 are mounted on the upper surface of the hopper 9. The stirring motor 13 is connected to the stirring assembly 11 via an output shaft. When the stirring motor 13 is started, it drives the stirring assembly 11 to rotate within the hopper 9 via the output shaft. The stirring assembly 11 stirs the materials, dispersing clumps and breaking up bridging. Combined with the flow-aiding air disc 10, this further enhances the anti-clogging effect. Simultaneously, the feed inlet 14 is used to replenish materials into the hopper 9, ensuring continuous and uninterrupted feeding.

[0025] A transition pipe 15 is sleeved below the feed pipe 6, and a limit ring 16 is installed below the transition pipe 15. Threaded rods 17 are installed on both the left and right sides of the upper surface of the limit ring 16. The outer wall of the transition pipe 15 is in close contact with the inner wall of the feed pipe 6. The upper end of the transition pipe 15 is open, and the inner wall of the opening has an arc-shaped structure. A limit nut 18 is installed on the threaded rod 17. Connecting plates 19 are installed on both the left and right sides of the feed pipe 6, and each connecting plate 19 has a limit hole 20. The center line of the limit hole 20 coincides with the center line of the threaded rod 17 to ensure no leakage during material conveying. The threaded rod 17 passes through the limit holes 20 of the connecting plates 19 on both sides of the feed pipe 6. The transition pipe 15 is fixed to the feed pipe 6 by tightening the limit nut 18. When cleaning is required, the limit nut 18 is unscrewed, and the transition pipe 15 can be removed from the feed pipe 6 to thoroughly clean residual materials, avoiding cross-contamination when changing materials, and meeting clean production standards. Example 2

[0026] Please see Figure 6 This utility model provides a technical solution: a stable feeding loss-in-weight scale with an airflow anti-blocking structure, including a spiral stirring mechanism 12. The difference between this embodiment and Embodiment 1 is that: The hopper 9 is equipped with a spiral stirring mechanism 12. The upper end of the spiral stirring mechanism 12 is connected to the output shaft of the stirring motor 13. The stirring motor 13 drives the spiral stirring mechanism 12 to rotate. When the spiral stirring mechanism 12 rotates, it can not only stir the material, but also generate downward vertical pressure to push the material to the bottom of the hopper 9, effectively breaking the bridging phenomenon caused by the poor flowability of the material and ensuring that the material falls smoothly into the connecting frame 8.

[0027] It should be noted that this application is applicable to the feeding operation of dry materials, and the weighing sensor 2 in this application is a technical feature existing in the field. Its internal structure and working principle will not be described in detail here. The specific installation position of the flow-aiding air disc 10 is designed according to the actual situation.

[0028] Working principle: When using this stable feed loss-in-weight scale with airflow anti-clogging structure, firstly, pour the material into the feed inlet 14 and start the stirring motor 13. The stirring motor 13 drives the internal stirring component 11 through the output shaft. The stirring component 11 disperses the agglomerated material. At the same time, multiple air-assisted discs 10 on the lower side wall of the hopper 9 are activated to generate air blowing and vibration. The dual action prevents the material from clogging. The material falls into the conveying pipe 5 through the connecting frame 8.

[0029] Start the conveyor motor 7, which drives the conveyor auger in the conveyor pipe 5 to rotate through the output shaft, pushing the material to the right and feeding it into the discharge pipe 6; the weighing sensor 2 above the support frame 1 monitors the total weight of the support plate 3 and the components above it in real time, and calculates the feeding flow rate through the weight change to ensure accurate feeding.

[0030] Material enters the lower sleeved transition pipe 15 through the feed pipe 6. The arc-shaped opening at the upper end of the transition pipe 15 guides the material to flow smoothly, and its outer wall tightly abuts against the inner wall of the feed pipe 6 to prevent leakage. When cleaning is required, unscrew the limiting nut 18 of the threaded rod 17 on the limiting ring 16. The threaded rod 17 disengages from the limiting holes 20 of the connecting plates 19 on both sides of the feed pipe 6, and the transition pipe 15 can be removed to clean up any residual material, thus completing a series of operations. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stable feeding loss-in-weight scale with an airflow anti-blocking structure, comprising a support frame (1), a conveying pipe (5), and a hopper (9), wherein a weighing sensor (2) is installed above the support frame (1), and a support plate (3) is installed above the weighing sensor (2), a side plate (4) is installed on the left side of the upper surface of the support plate (3), and the conveying pipe (5) is installed on the right side of the side plate (4), characterized in that: A discharge pipe (6) is installed on the right side of the conveying pipe (5), and a discharge hopper (9) is provided above the conveying pipe (5). An air-assisted disc (10) is installed on the lower side wall of the discharge hopper (9), and a stirring assembly (11) is provided inside the discharge hopper (9). A transition pipe (15) is sleeved below the feed pipe (6), and a limit ring (16) is installed below the transition pipe (15). Threaded rods (17) are installed on both the left and right sides of the upper surface of the limit ring (16).

2. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 1, characterized in that: The conveying pipe (5) is equipped with a conveying auger inside. A conveying motor (7) is installed on the left side of the side plate (4). The right side of the conveying motor (7) is connected to the conveying auger through an output shaft. The right side of the conveying pipe (5) is connected to the inside of the discharge pipe (6).

3. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 2, characterized in that: The upper part of the conveying pipe (5) is connected to a connecting frame (8), and the connecting frame (8) is connected to the hopper (9).

4. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 1, characterized in that: Multiple flow-aiding air discs (10) are provided, and the flow-aiding air discs (10) are connected to the pulse solenoid valve.

5. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 1, characterized in that: The upper surface of the hopper (9) is equipped with a stirring motor (13) and a feed inlet (14). The lower part of the stirring motor (13) is connected to the stirring assembly (11) through an output shaft.

6. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 5, characterized in that: The hopper (9) is equipped with a spiral stirring mechanism (12), the upper end of which is connected to the output shaft of the stirring motor (13).

7. The stable feed loss-in-weight scale with airflow anti-blocking structure according to claim 1, characterized in that: The outer wall of the transition tube (15) is in close contact with the inner wall of the feed tube (6), and the upper end of the transition tube (15) is designed with an opening. The inner wall of the opening is designed with an arc structure. A limit nut (18) is installed on the threaded rod (17). A connecting plate (19) is installed on both the left and right sides of the feed tube (6), and a limit hole (20) is opened on the connecting plate (19). The center line of the limit hole (20) coincides with the center line of the threaded rod (17).

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