High-precision powder constant feeder

Abstract

The utility model provides a high-precision powder quantitative feeding machine which comprises a machine body, a powder conveying belt is installed on the machine body, a bearing plate is installed on the inner side of the machine body, a plurality of sets of weighing sensors are evenly installed on the bearing plate, a weighing bridge frame is arranged above the bearing plate, a stress carrier roller is installed above the weighing bridge frame, and the stress carrier roller is installed on the machine body. A plurality of sets of stress carrier rollers are evenly arranged, a limiting assembly is installed on the inner side of the machine body and connected with the weighing bridge frame, an outer cover body is installed above the machine body, a feeding hopper is installed on the outer cover body, a material conveying cavity is formed between the outer cover body and the powder conveying belt, and a scraper assembly is installed at the output end of the material conveying cavity. A flying dust suppression assembly is mounted above the outer cover body; according to the utility model, an independent weighing system is adopted, a plurality of groups of uniformly distributed weighing sensors are used for cooperatively bearing the weighing bridge, and the uniformly distributed stress carrier rollers are matched, so that the metering error caused by local unbalance loading is eliminated, and the accurate measurement of the weight of powder is ensured.

Description

Technical Field

[0001] This utility model relates to the field of powder feeder technology, and in particular to a high-precision powder quantitative feeder. Background Technology

[0002] Powder metering feeders are widely used in mining, chemical, and metallurgical industries to precisely control the feed rate of powder materials, ensuring the stability of the production process and the uniformity of product quality. Traditional powder metering feeders typically transport powder materials to downstream process equipment via conveyor belts, screw conveyors, or vibrating feeders, and use weighing sensors to monitor and control the feed rate. However, existing technologies have certain shortcomings in terms of accuracy and stability.

[0003] Traditional powder metering feeders have their weighing systems directly connected to the conveyor belt system, making the weighing sensors susceptible to machine vibration, belt tension fluctuations, and external environmental interference. Uneven force distribution on the sensors often results in localized unbalanced loading, directly leading to measurement errors and compromising the accuracy and stability of material feeding. Especially when powder materials have strong adhesion, poor flowability, or large particle sizes, the accuracy of existing systems often falls short of demanding production requirements. Therefore, this invention proposes a high-precision powder metering feeder to address the problems existing in the prior art. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to propose a high-precision powder quantitative feeder. This high-precision powder quantitative feeder has the advantage of improving measurement accuracy and can solve the problems in the prior art.

[0005] To achieve the purpose of this utility model, the present utility model is implemented through the following technical solution: a high-precision powder quantitative feeder, including a machine body, a powder conveyor belt installed on the machine body, a load-bearing plate installed on the inner side of the machine body, a weighing sensor installed on the load-bearing plate, and several sets of weighing sensors are evenly arranged, a weighing bridge is provided above the load-bearing plate, and the lower end of the weighing bridge is connected to the weighing sensor, a force-bearing roller is installed above the weighing bridge, and several sets of force-bearing rollers are evenly arranged, a limit component is installed on the inner side of the machine body, and the limit component is connected to the weighing bridge, an outer cover is installed above the machine body, and a feed hopper is installed on the outer cover, a conveying cavity is formed between the outer cover and the powder conveyor belt, a scraper assembly is installed at the output end of the conveying cavity, and a dust suppression assembly is installed above the outer cover.

[0006] A further improvement is that the machine body includes two sets of symmetrically arranged mounting plates, which are connected by a connecting plate. The connecting plate has several sets of connecting plates. Two sets of symmetrically arranged drive rollers are installed between the two sets of mounting plates. The drive rollers are driven by a servo motor. Two sets of symmetrically arranged limiting rings are installed on the drive rollers, and the limiting rings are in contact with the edge of the powder conveyor belt.

[0007] A further improvement is that the scraper assembly includes a fixed plate, which is fixedly connected to the machine body, and a scraper is provided above the fixed plate. The upper end of the scraper is in contact with the surface of the powder conveyor belt, and the lower end of the scraper is connected to the fixed plate through an electric push rod. Two sets of electric push rods are symmetrically provided.

[0008] A further improvement is that the dust suppression component includes a fan, a dust suction pipe is installed on the inner side of the outer cover, and the lower end of the dust suction pipe is provided with several sets of feed inlets. The fan is located on the outer side of the outer cover, and a dust collector is installed at the input end of the fan through a pipe. The input end of the dust collector is connected to the dust suction pipe through a pipe.

[0009] A further improvement is that the limiting component includes a vertical guide rod, which is provided in several sets, and both ends of the vertical guide rod are connected to the machine body through fixing blocks. A connecting block is installed on the vertical guide rod through a rubber damping bushing, and the connecting block is connected to the weighing bridge.

[0010] A further improvement is that a tapered self-aligning roller is installed on the inner side of the machine body, and several sets of tapered self-aligning rollers are provided.

[0011] A further improvement is that a dust cover is installed at the upper end of the feed hopper, and a material distribution chamber is provided on the inner side of the feed hopper, and several groups of material distribution chambers are evenly arranged.

[0012] The beneficial effects of this utility model are as follows: This utility model adopts an independent weighing system, that is, it connects the weighing bridge and the weighing sensors to form an independent weighing platform "suspended" above the machine body. Multiple sets of evenly distributed weighing sensors work together to support the weighing bridge, and with the evenly distributed force-bearing rollers, it eliminates measurement errors caused by localized uneven loading, thereby ensuring accurate measurement of powder weight and guaranteeing the accuracy of quantitative feeding. Furthermore, the flexible constraints of the limiting components physically isolate machine body vibration and belt tension fluctuations, improving anti-interference during the measurement process. In addition, the sealed conveying chamber formed by the outer cover and the conveyor belt, combined with dust suppression components, prevents dust from contaminating the weighing sensors, maintaining the long-term stable operation of the platform. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, 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.

[0014] Figure 1 This is a front view structural diagram of this utility model.

[0015] Figure 2 This is a side view of the weighing cable tray after installation, according to the present invention.

[0016] Figure 3 This is a schematic diagram of the powder conveyor belt after installation and testing according to this utility model.

[0017] Figure 4 This is a partially enlarged schematic diagram of point A of this utility model.

[0018] Figure 5 This is a top view schematic diagram of the material distribution chamber structure of this utility model.

[0019] The components include: 1. Machine body; 2. Powder conveyor belt; 3. Load-bearing plate; 4. Weighing sensor; 5. Weighing bridge; 6. Force-bearing idler roller; 7. Outer cover; 8. Feed hopper; 9. Feeding chamber; 10. Mounting plate; 11. Connecting plate; 12. Drive roller; 13. Limiting ring; 14. Fixing plate; 15. Scraper; 16. Electric push rod; 17. Fan; 18. Dust suction pipe; 19. Vertical guide rod; 20. Fixing block; 21. Connecting block; 22. Conical self-aligning idler roller; 23. Dust cover; 24. Distributing chamber; 25. Dust collector; 26. Side guard. Detailed Implementation

[0020] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0021] according to Figures 1-5As shown, this embodiment proposes a high-precision powder quantitative feeder, including a machine body 1. A powder conveyor belt 2 is mounted on the machine body 1. Side guards 26 are provided at both the front and rear ends of the powder conveyor belt 2. The side guards 26 are elastically arranged and perpendicular to the powder conveyor belt 2. Specifically, the machine body 1 includes two sets of symmetrically arranged mounting plates 10, which are connected by connecting plates 11. Several sets of connecting plates 11 are provided. In this embodiment, there are a total of four sets of connecting plates 11, thus forming a complete machine body 1. Two sets of support feet are installed at the lower end of the mounting plates 10. Two sets of symmetrically arranged drive rollers 12 are installed between the two sets of mounting plates 10. The drive rollers 12 are used to drive the powder conveyor belt 2 to rotate. The two ends of the drive roller shaft are connected to the mounting plates 10 through self-aligning roller bearings with locking sleeves, and the drive rollers 12 are driven by a servo motor. The servo motor is located on the outside of the mounting plate 10 and is connected to the mounting plate 10 via a bracket. The output end of the servo motor is connected to the drive roller 12 via a reducer.

[0022] Two sets of symmetrically arranged limiting rings 13 are installed on the drive roller 12, and the limiting rings 13 are in contact with the edge of the powder conveyor belt 2. The inner diameter of the limiting rings 13 is interference-fitted with the roller body (interference amount 0.1~0.2mm), thereby creating a limiting effect on the split conveyor belt 2.

[0023] A load-bearing plate 3 is installed on the inner side of the body 1, located in the middle of the body 1. A hydraulic damper (damping coefficient c = 300-500 N·s / m) is installed between the load-bearing plate 3 and the body 1, symmetrically arranged at the four corners. Weighing sensors 4 are installed on the load-bearing plate 3, with several groups of sensors evenly distributed. In this embodiment, four groups of weighing sensors 4 are evenly distributed. A weighing bridge 5 is installed above the load-bearing plate 3, with its lower end connected to the weighing sensors 4. Specifically, a rigid pad with a positioning pin is provided between the weighing sensors 4 and the load-bearing plate 3. A double spherical washer assembly (upper / lower spherical radius ratio 1:1.2) and an axial preload spring (preload spring force ≥200 N) are provided between the bottom of the weighing bridge 5 and the top of the sensor 4 to ensure a tight fit between the spherical surfaces.

[0024] A load-bearing roller 6 is installed above the weighing bridge 5, and several sets of load-bearing rollers 6 are evenly arranged. In this embodiment, five sets of load-bearing rollers 6 are evenly arranged to ensure that the powder conveyor belt 2 maintains stable support during the weighing process. The function of the load-bearing roller 6 is to reduce the friction of the material on the conveyor belt, ensure that the material passes smoothly through the weighing area, and guarantee weighing accuracy.

[0025] A limiting component is installed inside the machine body 1 and connected to the weighing bridge 5. The limiting component includes several sets of vertical guide rods 19, both ends of which are connected to the machine body 1 via fixing blocks 20. Connecting blocks 21 are mounted on the vertical guide rods 19 via rubber damping bushings and are connected to the weighing bridge 5. The rubber damping bushings 22 act as buffer components, reducing vibration and impact during weighing and minimizing the influence of external interference on the weighing results. The function of the limiting component is to prevent unnecessary displacement of the weighing bridge 5 when subjected to external forces or vibrations, thereby maintaining weighing accuracy.

[0026] An outer cover 7 is installed on top of the machine body 1. This cover serves a sealing function, but is not completely closed. It acts as a barrier along the powder conveying path, enclosing the output section of the machine body 1 to ensure the safe transport of powder materials and prevent external interference with the feeding process. A feed hopper 8 is installed on the outer cover 7 to receive external powder materials and guide them into the conveying system. A dust cover 23 is installed at the top of the feed hopper 8; the dust cover 23 is an openable design. A distribution chamber 24 is provided inside the feed hopper 8, and several groups of distribution chambers 24 are evenly distributed. The function of these distribution chambers 24 is to ensure the uniform distribution of powder on the conveyor belt, preventing material accumulation or deviation, thereby improving the quantitative accuracy and stability of the feeder.

[0027] A conveying chamber 9 is formed between the outer cover 7 and the powder conveyor belt 2. This chamber guides the flow of powder materials and prevents material overflow. A scraper assembly is installed at the output end of the conveying chamber 9. The scraper assembly includes a fixed plate 14, which is located below the powder conveyor belt 2, but its position corresponds to the material discharge position. The fixed plate 14 is fixedly connected to the machine body 1, and a scraper 15 is provided above the fixed plate 14. The upper end of the scraper 15 contacts the surface of the powder conveyor belt 2, and the lower end of the scraper 15 is connected to the fixed plate 14 through an electric push rod 16. Two sets of electric push rods 16 are symmetrically arranged. The function of the scraper assembly is to prevent material from adhering to the powder conveyor belt 2 during the material discharge process. The electric push rod 16 is used to adjust the position of the scraper 15 (the telescopic end of the electric push rod 16 is connected to the scraper 15) to ensure close contact between the scraper 15 and the surface of the conveyor belt 2, thereby enhancing the scraping effect.

[0028] A dust suppression assembly is installed on the top of the outer casing 7 to reduce dust pollution generated during the conveying of powder materials. It also has the function of dust recovery, reducing resource waste. This assembly includes a fan 17, a suction pipe 18 installed inside the outer casing 7 with several feed inlets at its lower end, and the fan 17 located outside the outer casing 7. A dust collector 25 is installed at the input end of the fan 17 via a pipe, and a dust collection bag is installed inside the dust collector 25. The input end of the dust collector 25 is connected to the suction pipe 18 via a pipe. During operation, the fan 17 creates a negative pressure environment inside the dust collector 25, which draws in dust through the suction pipe 18 and guides it to the dust collector 25 for processing.

[0029] The inner side of the machine body 1 is equipped with a conical self-aligning roller 22, and there are several sets of conical self-aligning rollers 22. In this embodiment, two sets of conical self-aligning rollers 22 are symmetrically arranged and distributed on the left and right sides of the weighing bridge 5. They are used to support and adjust the running state of the powder conveyor belt 2, ensure that the conveyor belt remains stable during operation, and reduce the negative impact caused by friction or deviation.

[0030] During operation, the powder conveyor belt 2 rotates, and powder falls from the feed hopper 8 onto the conveyor belt 2. During this conveying process, when the powder material passes through the weighing bridge 5, the bridge is subjected to the gravity of the material, which is converted into an eccentric load on the weighing bridge. This eccentric load is captured by the load cell 4 and converted into a vertical force. The load cell 4 measures the vertical force using a precise sensor system, thereby calculating the weight of the material passing through the weighing bridge 5. If the material weight reaches the set target weight, the conveyor belt speed is adjusted or feeding is stopped, thus achieving quantitative feeding.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision powder quantitative feeder, comprising a machine body (1), wherein a powder conveyor belt (2) is installed on the machine body (1), characterized in that: A load-bearing plate (3) is installed on the inner side of the machine body (1). A weighing sensor (4) is installed on the load-bearing plate (3), and several sets of weighing sensors (4) are evenly arranged. A weighing bridge (5) is provided above the load-bearing plate (3), and the lower end of the weighing bridge (5) is connected to the weighing sensor (4). A force-bearing roller (6) is installed above the weighing bridge (5), and several sets of force-bearing rollers (6) are evenly arranged. A limit component is installed on the inner side of the machine body (1), and the limit component is connected to the weighing bridge (5). An outer cover (7) is installed above the machine body (1), and a feed hopper (8) is installed on the outer cover (7). A conveying chamber (9) is formed between the outer cover (7) and the powder conveyor belt (2). A scraper assembly is installed at the output end of the conveying chamber (9). A dust suppression component is installed above the outer cover (7).

2. The high-precision powder metering feeder according to claim 1, characterized in that: The machine body (1) includes two sets of symmetrically arranged mounting plates (10), which are connected by a connecting plate (11). The connecting plate (11) has several sets of connecting plates. Two sets of symmetrically arranged drive rollers (12) are installed between the two sets of mounting plates (10). The drive rollers (12) are driven by a servo motor. Two sets of symmetrically arranged limiting rings (13) are installed on the drive rollers (12), and the limiting rings (13) are in contact with the edge of the powder conveyor belt (2).

3. The high-precision powder metering feeder according to claim 1, characterized in that: The scraper assembly includes a fixed plate (14), which is fixedly connected to the machine body (1). A scraper (15) is provided above the fixed plate (14). The upper end of the scraper (15) is in contact with the surface of the powder conveyor belt (2), and the lower end of the scraper (15) is connected to the fixed plate (14) through an electric push rod (16). Two sets of electric push rods (16) are symmetrically provided.

4. A high-precision powder metering feeder according to claim 1, characterized in that: The dust suppression assembly includes a fan (17), a dust suction pipe (18) is installed on the inner side of the outer cover (7), and the lower end of the dust suction pipe (18) is provided with several sets of feed inlets. The fan (17) is located on the outer side of the outer cover (7), and a dust collector (25) is installed at the input end of the fan (17) through a pipe. The input end of the dust collector (25) is connected to the dust suction pipe (18) through a pipe.

5. A high-precision powder metering feeder according to claim 1, characterized in that: The limiting component includes a vertical guide rod (19), which is provided in several groups. Both ends of the vertical guide rod (19) are connected to the machine body (1) through a fixing block (20). A connecting block (21) is installed on the vertical guide rod (19) through a rubber damping bushing, and the connecting block (21) is connected to the weighing bridge (5).

6. A high-precision powder metering feeder according to claim 1, characterized in that: The inner side of the machine body (1) is equipped with a conical self-aligning roller (22), and the conical self-aligning roller (22) is provided in several groups.

7. A high-precision powder metering feeder according to claim 1, characterized in that: The upper end of the feed hopper (8) is equipped with a dust cover (23), and the inner side of the feed hopper (8) is provided with a material distribution chamber (24), and the material distribution chamber (24) is evenly provided with several groups.

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