Powder metering device of high-precision material level control concrete mixing plant

Abstract

The utility model belongs to the technical field of concrete mixing plants, and particularly relates to a powder metering device of a high-precision material level control concrete mixing plant. Comprising a support, a metering tank is installed on the support, an air cylinder is installed above the metering tank, a motor is fixed to the output end of the air cylinder, a connecting rod is fixed to the output end of the motor, scraping rods are fixed to the two ends of the connecting rod, brushes are fixed to the scraping rods, and check blocks are fixed to the inner wall of the metering tank. According to the metering tank, powder adhered to the inner wall of the metering tank can be cleaned, and the situation that the concrete quality is affected by inaccurate concrete proportion caused by reduction of the feeding amount of the powder is prevented.

Description

Technical Field

[0001] This utility model belongs to the technical field of concrete mixing plants, and in particular relates to a powder metering device for high-precision material level control concrete mixing plants. Background Technology

[0002] Currently, engineering projects have increasingly stringent requirements for concrete quality. Therefore, concrete mixing plants face higher demands in terms of raw materials, production processes, and process control. High-quality concrete production is reflected in every stage of the production process, and improving the accuracy of material level control is an essential means. High-precision material level control ensures accurate proportions of various raw materials and provides reliable data support for raw material management.

[0003] Improvements to high-precision material level control in concrete mixing plants require not only enhanced accuracy of individual metering devices but also meticulous attention to detail. Currently, powder metering devices in concrete mixing plants typically include a metering tank, a load cell, and a support frame. Powder enters the metering tank for precise measurement before being discharged into the concrete mixing plant. During this process, if the powder has poor flowability, it easily adheres to the inner wall of the metering tank, reducing the amount of powder entering the mixing plant. If a large amount adheres, it can severely impact concrete quality. To address this, vibrators are installed on the metering tank to dislodge the adhered powder. However, this can affect the load cell, causing inaccurate weighing.

[0004] Patent CN202120969088 discloses a powder feeding device for a concrete mixing plant. This patent uses a scraper assembly to clean the powder on the inner wall. However, this patent has the following shortcomings: after the powder is fed, it falls onto the hanging assembly. Although the first and second scrapers collide with each other to make some powder fall off, some powder still remains on the mounting plate. The device uses a fan to create a negative pressure inside the storage tank, and the falling powder is adsorbed to the air duct, reducing the possibility of secondary adhesion to the inner wall of the storage tank. However, at the same time, some powder is also drawn away, resulting in a reduction in the amount of powder, which is not conducive to improving the accuracy of the concrete mix proportion. Summary of the Invention

[0005] The purpose of this invention is to provide a high-precision material level control powder metering device for concrete mixing plants, so as to solve the problems existing in the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A high-precision material level control powder metering device for a concrete mixing plant includes a support frame, a metering tank mounted on the support frame, a cylinder mounted above the metering tank, a motor fixed to the output end of the cylinder, a connecting rod fixed to the output end of the motor, scraper rods fixed to both ends of the connecting rods, brushes fixed to the scraper rods, and a stop block fixed to the inner wall of the metering tank.

[0008] Furthermore, several weighing sensors are symmetrically installed on the support, with the other end of each weighing sensor fixed to the metering tank. The metering tank is mounted on the support via the weighing sensors.

[0009] Furthermore, the metering tank is a circular tank with a conical bottom. The inside of the metering tank is divided into an interconnected storage chamber and a metering chamber from top to bottom. The metering chamber of the metering tank is connected to an inlet and an exhaust port.

[0010] Furthermore, the cylinder is fixed to the metering tank at the top of the storage cavity, and the output end of the cylinder passes through the metering tank and is fixed with a mounting box. The motor is fixed to the output end of the cylinder through the mounting box.

[0011] Furthermore, a rotating shaft is fixed to the output end of the motor, and the rotating shaft passes through and is connected to the mounting box by a bearing. A connecting rod is fixed to one end of the rotating shaft that passes through the mounting box.

[0012] Furthermore, the rotating shaft is fixed at the center of the connecting rod, the connecting rod is set horizontally, the scraper has a vertical side and a downward-sloping side, the vertical side of the scraper is fixed at both ends of the connecting rod, and the brush is fixed on the side of the scraper facing the inner wall of the metering tank.

[0013] Furthermore, there are two stops, located at the top of the metering chamber and directly below the receiving chamber.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model can clean the powder adhering to the inner wall of the metering tank, preventing the reduction of powder feed from causing inaccurate concrete proportions and affecting the quality of concrete.

[0016] 2. The inner wall of the metering tank is cleaned by a scraper and its brush to prevent powder from adhering to the inner wall of the metering tank.

[0017] 3. By setting a receiving cavity on the metering tank and retracting the scraper into the receiving cavity through the retraction of the cylinder, the powder is prevented from falling onto the installation box, connecting rod, and scraper during feeding, thus preventing the powder from falling into the mixing equipment and causing inaccurate concrete mix proportions.

[0018] 4. The scraper is limited by a stop block, so that the connecting rod is parallel to the storage cavity and located directly below the storage cavity, thus facilitating the scraper to enter the storage cavity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a cross-sectional view of the scraper of this utility model when it is located at the bottom of the metering tank.

[0022] Figure 4 This is a utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0023] The components are: 1. bracket; 2. metering tank; 3. cylinder; 4. motor; 5. connecting rod; 6. scraper; 7. brush; 8. stop block; 9. load cell; 10. storage cavity; 11. metering cavity; 12. feed inlet; 13. exhaust port; 14. mounting box; 15. rotating shaft. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0025] like Figure 1-4 As shown, the high-precision material level control powder metering device for a concrete mixing plant includes a support 1, a metering tank 2 mounted on the support 1, a cylinder 3 mounted above the metering tank 2, a motor 4 fixed to the output end of the cylinder 3, a connecting rod 5 fixed to the output end of the motor 4, scraper rods 6 fixed to both ends of the connecting rod 5, a brush 7 fixed to the scraper rod 6, and a stop block 8 fixed to the inner wall of the metering tank 2.

[0026] Several weighing sensors 9 are symmetrically mounted on the support 1. The other end of each weighing sensor 9 is fixed to the metering tank 2, which is mounted on the support 1 via the weighing sensors 9. The weighing sensors 9 are used to weigh the incoming powder, thereby accurately controlling the powder feed rate.

[0027] Metering tank 2 is a circular tank with a conical bottom. Inside metering tank 2, from top to bottom, there are two interconnected chambers: a receiving chamber 10 and a metering chamber 11. The metering chamber 11 is connected to an inlet 12 and an outlet 13. The receiving chamber 10 is used to house the mounting box 14, connecting rod 5, and scraper 6, thus preventing powder from falling onto the mounting box 14, connecting rod 5, and scraper 6 during the feeding process, which would reduce the amount of powder fed.

[0028] Cylinder 3 is fixed to the metering tank 2 at the top of the receiving cavity 10. The output end of cylinder 3 passes through metering tank 2 and is fixed to mounting box 14. Motor 4 is fixed to the output end of cylinder 3 through mounting box 14. The extension or retraction of cylinder 3 drives the scraper to move up and down, thereby cleaning different positions on the inner wall of metering tank 2. Motor 4 is used to drive the scraper to rotate, cleaning the inner wall of metering tank 2.

[0029] The output end of the motor 4 is fixed with a rotating shaft 15, which passes through and is connected to the mounting box 14 by a bearing. The connecting rod 5 is fixed at one end of the rotating shaft 15 that passes through the mounting box 14.

[0030] The rotating shaft 15 is fixed at the center of the connecting rod 5, which is horizontally positioned. The scraper 6 has a vertical side and a downward-sloping side. The vertical side of the scraper 6 is fixed to both ends of the connecting rod 5. The brush 7 is fixed to the side of the scraper 6 facing the inner wall of the metering tank 2. The downward-sloping side of the scraper 6 is used to clean the conical bottom of the metering tank 2.

[0031] There are two stop blocks 8, which are located at the top of the metering chamber 11 and directly below the receiving chamber 10. The stop blocks 8 are used to limit the scraper rod 6, so that the connecting rod 5 is parallel to the receiving chamber 10 and located directly below the receiving chamber 10, thereby facilitating the scraper rod 6 to enter the receiving chamber 10.

[0032] The working principle of this utility model is as follows:

[0033] In operation, powder enters metering tank 2 through inlet 12 via auger or other conveying equipment. Exhaust port 13 is used for venting to prevent air stagnation during feeding. Weighing sensor 9 measures the powder, and once the set weight is reached, feeding stops and discharge begins. The powder enters the mixing equipment from the discharge port at the bottom of metering tank 2. After discharge, powder adheres to the inner wall of metering tank 2. Cylinder 3 extends. The extension length of cylinder 3 is set. When connecting rod 5 is fully positioned under stop 8, stop 8 does not obstruct the rotation of connecting rod 5. At this point, the start button is pressed, causing scraper 6 to rotate. Brush 7 abuts against the inner wall of metering tank 2, cleaning the inner wall and brushing off the adhered powder, which is then discharged into the mixing equipment from the discharge port. When scraper 6 is at the conical bottom of metering tank 2, brush 7 on the inclined side of scraper 6 cleans the inner wall of the conical bottom of metering tank 2. After cleaning, cylinder 3 retracts. When it reaches the position of stop 8, motor 4 stops working. Scraper 6 continues to rotate under inertia and is eventually blocked by stop 8, thus limiting scraper 6. This makes connecting rod 5 parallel to the receiving cavity 10 and located directly below the receiving cavity 10. Cylinder 3 continues to retract, storing mounting box 14, connecting rod 5, and scraper 6 into the receiving cavity 10, thereby preventing powder from falling onto mounting box 14, connecting rod 5, and scraper 6 during the feeding process.

[0034] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention.

[0035] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A powder metering device for a high-precision material level control concrete mixing plant, characterized in that, The device includes a support frame on which a metering tank is mounted. A cylinder is mounted above the metering tank. A motor is fixed to the output end of the cylinder. A connecting rod is fixed to the output end of the motor. Scraper rods are fixed to both ends of the connecting rods. Brushes are fixed to the scraper rods. A stop block is fixed to the inner wall of the metering tank.

2. The powder metering device for high-precision material level control concrete mixing plant according to claim 1, characterized in that, Several weighing sensors are symmetrically installed on the bracket, and the other end of the weighing sensor is fixed to the metering tank. The metering tank is installed on the bracket through the weighing sensor.

3. The powder metering device for high-precision material level control concrete mixing plant according to claim 1, characterized in that, The metering tank is a circular tank with a conical bottom. The inside of the metering tank is divided into an interconnected storage cavity and a metering cavity from top to bottom. The metering cavity of the metering tank is connected to an inlet and an exhaust port.

4. The powder metering device for a high-precision material level control concrete mixing plant according to claim 3, characterized in that, The cylinder is fixed to the metering tank at the top of the storage cavity. The output end of the cylinder passes through the metering tank and is fixed with a mounting box. The motor is fixed to the output end of the cylinder through the mounting box.

5. The powder metering device for high-precision material level control concrete mixing plant according to claim 4, characterized in that, The output end of the motor is fixed with a rotating shaft, which passes through and is connected to the mounting box by a bearing. A connecting rod is fixed at one end of the rotating shaft that passes through the mounting box.

6. The powder metering device for a high-precision material level control concrete mixing plant according to claim 5, characterized in that, The rotating shaft is fixed at the center of the connecting rod, which is horizontally positioned. The scraper has a vertical side and a downward-sloping side. The vertical side of the scraper is fixed to both ends of the connecting rod, and the brush is fixed to the side of the scraper facing the inner wall of the metering tank.

7. The powder metering device for high-precision material level control concrete mixing plant according to claim 5, characterized in that, There are two blocks, which are located at the top of the metering cavity and directly below the receiving cavity.

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