Feed metering device for concrete mixing plant

Abstract

The utility model discloses a feed metering device for a concrete mixing plant, and mainly relates to the field of feed metering of mixing plants. Comprising a metering scale, a powder feeding hopper and a liquid feeding hopper are arranged on the metering scale, a liquid pumping pipe is arranged in the liquid feeding hopper, a water pump is arranged on the liquid pumping pipe, a shower pipe is arranged at the position, close to the top, in the powder feeding hopper, the liquid pumping pipe extends into the powder feeding hopper and is communicated with the shower pipe, and a plurality of shower nozzles are arranged on the shower pipe. A rotating shaft is rotationally connected into the powder feeding hopper, a plurality of stirring rods are distributed on the rotating shaft in an array mode, scraping plates are arranged among the stirring rods in the same plane, and the scraping plates make contact with the side wall of the powder feeding hopper. The feeding hopper has the advantages that the technical problem that powder of concrete is prone to remaining in the feeding hopper when fed, and grading accuracy of all groups is affected can be solved, the residual amount of the powder in the feeding hopper is reduced, and the accuracy of feeding metering and actual feeding is improved.

Description

Technical Field

[0001] This utility model relates to the field of feed metering in concrete mixing plants, specifically a feed metering device for concrete mixing plants. Background Technology

[0002] After being weighed by a metering device, the various raw materials for concrete enter the mixing device for stirring. However, the powder materials tend to adhere to the feed hopper, affecting the accuracy of the powder addition and the final quality of the concrete. The current solution is to install a vibrating motor on the powder feed hopper to shake off the adhering powder. However, this method can easily cause continuous vibration to the metering device, which can affect its accuracy over time. Furthermore, when the powder clumps on the side wall of the feed hopper, it is difficult to shake it off by vibration alone. This results in a discrepancy between the actual amount of powder fed and the measured amount, affecting the quality of the finished concrete product. Utility Model Content

[0003] The purpose of this utility model is to provide a feeding metering device for concrete mixing plants, which can solve the technical problem that the powder material of concrete is easily left in the feeding hopper during feeding, affecting the accuracy of the gradation of each component. It uses the liquid in the feeding hopper to assist in softening and cleaning the residual powder material, reducing the amount of powder material remaining in the feeding hopper, and improving the accuracy of feeding metering and actual feeding.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A feeding and metering device for a concrete mixing plant includes a weighing scale with a powder feeding hopper and a liquid feeding hopper. The liquid feeding hopper has a suction pipe with a water pump attached. The powder feeding hopper has a rinsing pipe near the top, which extends into the hopper and connects to the rinsing pipe. The rinsing pipe has multiple rinsing nozzles. A rotating shaft is rotatably connected inside the powder feeding hopper, and multiple stirring rods are arranged in an array on the shaft. Scrapers are provided between the stirring rods in the same plane, and the scrapers contact the side wall of the powder feeding hopper.

[0006] Furthermore, the side wall of the powder feed hopper is provided with an inclined baffle, and the rinsing pipe is located at the bottom of the baffle.

[0007] Furthermore, a drying tube is provided at the bottom of the baffle, and multiple air nozzles are provided on the drying tube.

[0008] Furthermore, the spray nozzles are arranged vertically downwards, and the air jets are positioned towards the side wall of the powder feed hopper.

[0009] Furthermore, both the powder feed hopper and the liquid feed hopper are funnel-shaped, wider at the top and narrower at the bottom.

[0010] Furthermore, both the powder feed hopper and the liquid feed hopper are equipped with electromagnetic valves at their bottoms.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The structure of this utility model is achieved by setting a powder feed hopper and a liquid feed hopper on the weighing scale to measure the powder and liquid to be fed, respectively. After the measured powder is fed, a water pump is used to pump the liquid in the liquid feed hopper into the flushing pipe in the powder feed hopper through the liquid extraction pipe. This uses the weighed liquid to dissolve and soften the powder adhering to the inner wall of the powder feed hopper, making it easier for the residual powder to slide off the side wall. This greatly reduces the amount of powder residue in the feed hopper, improves the convenience of cleaning residual powder, ensures the accuracy of the powder feed amount, and the liquid used for flushing is the liquid in the weighed liquid feed hopper, so that the proportion of each component entering the mixing device will not change, thus ensuring the quality of concrete mixing.

[0013] 2. A rotating shaft is rotatably connected inside the powder feed hopper. Multiple stirring rods are arrayed on the shaft. Scrapers are installed between the stirring rods on the same plane. The scrapers contact the side wall of the powder feed hopper. With this structure, after the liquid dissolves and softens the residual powder, the rotating shaft drives the multiple stirring rods and scrapers to rotate, scraping away the liquid and powder remaining on the side wall of the powder feed hopper. This further reduces the amount of liquid and powder residue, making the cleaning of residual powder more effective and thorough. Attached Figure Description

[0014] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Appendix Figure 2 This is the right view of this utility model.

[0016] Appendix Figure 3 This is an appendix to this utility model. Figure 2 A cross-sectional view along the AA direction.

[0017] Appendix Figure 4 This is an appendix to this utility model. Figure 3 A cross-sectional view along the BB direction.

[0018] Appendix Figure 5 This is an appendix to this utility model. Figure 3 A magnified view of part C in the middle.

[0019] The labels shown in the attached diagram:

[0020] 1. Weighing scale; 2. Powder feed hopper; 3. Liquid feed hopper; 4. Liquid extraction pipe; 5. Water pump; 6. Spray pipe; 7. Spray nozzle; 8. Rotary shaft; 9. Stirring rod; 10. Scraper; 11. Baffle; 12. Drying pipe; 13. Air nozzle; 14. Solenoid valve. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0022] Reference Figure 1 and Figure 2 This utility model describes a feeding and metering device for a concrete mixing plant. The main structure includes a weighing scale 1, which is suspended above the mixer via multiple pressure sensors to weigh the materials entering the mixer. The weighing scale 1 is equipped with a powder feed hopper 2 and a liquid feed hopper 3. The powder components of the concrete enter the mixer through the powder feed hopper 2, and the liquid components enter through the liquid feed hopper 3. During weighing, the powder is weighed first, and then the liquid is added and weighed to ensure that the two weighings do not interfere with each other. The liquid feed hopper 3 is equipped with a suction pipe 4, which extends towards the bottom of the liquid feed hopper 3 to extract a sufficient amount of liquid. A water pump 5 is installed on the suction pipe 4. The water pump 5 can be a centrifugal pump or a reciprocating pump, which can be used to extract the liquid from the liquid feed hopper 3. A flushing pipe 6 is located near the top of the powder feed hopper 2. Figure 4Preferably, the flushing pipe 6 is annular, encircling the side wall of the powder feed hopper 2. The liquid extraction pipe 4 extends into the powder feed hopper 2 and communicates with the flushing pipe 6. This structure allows the water pump 5 to draw liquid into the flushing pipe 6. The flushing pipe 6 is equipped with multiple flushing nozzles 7, which are arranged in a circular array at various positions on the flushing pipe 6. This ensures that the sprayed liquid can be sprayed onto the side wall of the powder feed hopper 2 at various positions, thereby mixing with the residual powder on the side wall of the powder feed hopper 2. This makes it easier for the powder to flow out along the side wall, achieving effective cleaning of residual powder, ensuring the accuracy of powder addition, and ensuring that the cleaning liquid comes from the metered liquid feed hopper 3. Only in this way will the proportion of each component entering the mixer remain unchanged, ensuring the accuracy of the feeding ratio and ensuring the accuracy of concrete mixing. Regarding the quality of processing, a rotating shaft 8 is rotatably connected to the powder feed hopper 2 via bearings. Specifically, a fixed frame is set inside the powder feed hopper 2, and a motor is fixed to the fixed frame by welding or bolts. The rotating shaft 8 is connected to the output shaft of the motor to drive the rotation of the rotating shaft 8. Multiple stirring rods 9 are arranged in an array on the rotating shaft 8 by welding or bolts. Scrapers 10 are provided between the multiple stirring rods 9 in the same plane. The scrapers 10 are in contact with the side wall of the powder feed hopper 2. With this structure, after the liquid dissolves and softens the powder residue on the inner wall of the powder feed hopper 2, the rotating shaft 8 drives the stirring rods 9 and scrapers 10 to rotate, scraping off the remaining liquid and powder on the side wall through the scrapers 10. The powder is then finally dropped into the agitator along the powder feed hopper 2, making the cleaning of the powder more thorough and further reducing the amount of powder residue.

[0023] Preferred, refer to Figure 3 and Figure 5 An inclined baffle 11 is fixed to the side wall of the powder feed hopper 2 by welding or bolts. The shower pipe 6 is located at the bottom of the baffle 11. This structure uses the baffle 11 to block the shower pipe 6, so as to prevent the powder from sticking to or blocking the shower pipe 6 when it is fed, and to ensure the smooth operation of the shower nozzle 7 on the shower pipe 6 in subsequent use.

[0024] Preferably, the bottom of the baffle 11 is also provided with a drying pipe 12, which is connected to an external air supply device. The drying pipe 12 is provided with multiple air nozzles 13. The multiple air nozzles 13 on the drying pipe 12 blow air onto the side wall of the powder feed hopper 2, so that the residual liquid is quickly scraped off by the scraper 10, avoiding the subsequent powder feeding from adhering to the side wall of the powder feed hopper 2 after contact with the liquid, thus reducing the residual amount of powder feeding in the future.

[0025] Preferably, the spray nozzle 7 is arranged vertically downwards, and the air jet nozzle 13 is arranged towards the side wall of the powder feed hopper 2. This arrangement makes it difficult for powder to accumulate and clog the spray nozzle 7, ensuring the smoothness of subsequent spray cleaning. The air jet nozzle 13 blows air towards the side wall of the powder feed hopper 2, so that the residual liquid on it can be cleaned by the scraper 10 more quickly, improving the efficiency of drying the side wall of the powder feed hopper 2.

[0026] Preferably, both the powder feed hopper 2 and the liquid feed hopper 3 are funnel-shaped, wider at the top and narrower at the bottom. This structure allows both powder and liquid to be fed along the inclined funnel-shaped sidewalls, reducing the amount of residue on the inner wall of the feed hopper and improving the smoothness and accuracy of feeding.

[0027] Preferably, both the powder feed hopper 2 and the liquid feed hopper 3 are equipped with electromagnetic valves 14 at their bottoms. The electromagnetic valves 14 are used to control the opening and closing of the powder and liquid feed channels, thereby enabling more convenient and accurate control of the feed amount of both.

[0028] Working Principle: This utility model features a powder feed hopper 2 and a liquid feed hopper 3 on a weighing scale 1. These hoppers respectively measure the powder and liquid to be fed. After the measured powder is fed in, a water pump 5 draws the liquid from the liquid feed hopper 3 through a suction pipe 4 into a rinsing pipe 6 inside the powder feed hopper 2. This dissolves and softens the powder adhering to the inner wall of the powder feed hopper 2 with the weighed liquid, making it easier for residual powder to slide off the side wall. This significantly reduces the amount of powder remaining in the feed hopper, improves the convenience of cleaning residual powder, and ensures the accuracy of the powder feed rate. Furthermore, the rinsing liquid is the liquid from the weighed liquid feed hopper 3. The liquid ensures that the proportions of each component entering the mixing device remain unchanged, guaranteeing the quality of concrete mixing. A rotating shaft 8 is rotatably connected inside the powder feed hopper 2, with multiple stirring rods 9 arranged in an array on the shaft 8. Scrapers 10 are positioned between the stirring rods 9 on the same plane, contacting the side wall of the powder feed hopper 2. This structure allows the liquid to dissolve and soften the residual powder, and then the rotating shaft 8 drives the stirring rods 9 and scrapers 10 to rotate, scraping away the remaining liquid and powder on the side wall of the powder feed hopper 2. This further reduces the amount of residual liquid and powder, making the cleaning of residual powder more effective and thorough.

Claims

1. A feeding and metering device for a concrete mixing plant, comprising a weighing scale (1), wherein the weighing scale (1) is provided with a powder feeding hopper (2) and a liquid feeding hopper (3), characterized in that: The liquid feed hopper (3) is provided with a liquid extraction pipe (4), and a water pump (5) is provided on the liquid extraction pipe (4). The powder feed hopper (2) is provided with a rinsing pipe (6) near the top. The liquid extraction pipe (4) extends into the powder feed hopper (2) and is connected to the rinsing pipe (6). The rinsing pipe (6) is provided with multiple rinsing nozzles (7). The powder feed hopper (2) is rotatably connected with a rotating shaft (8). Multiple stirring rods (9) are arranged in an array on the rotating shaft (8). Scrapers (10) are provided between the multiple stirring rods (9) in the same plane. The scrapers (10) are in contact with the side wall of the powder feed hopper (2).

2. The feeding metering device for a concrete mixing plant according to claim 1, characterized in that: The side wall of the powder feed hopper (2) is provided with an inclined baffle (11), and the rinsing pipe (6) is located at the bottom of the baffle (11).

3. The feeding metering device for a concrete mixing plant according to claim 2, characterized in that: The bottom of the baffle (11) is also provided with a drying tube (12), and the drying tube (12) is provided with multiple air nozzles (13).

4. The feeding metering device for a concrete mixing plant according to claim 3, characterized in that: The shower nozzle (7) is set vertically downwards, and the air nozzle (13) is set towards the side wall of the powder feed hopper (2).

5. The feeding metering device for a concrete mixing plant according to claim 1, characterized in that: Both the powder feed hopper (2) and the liquid feed hopper (3) are funnel-shaped, wider at the top and narrower at the bottom.

6. The feeding metering device for a concrete mixing plant according to claim 1, characterized in that: Both the powder feed hopper (2) and the liquid feed hopper (3) are equipped with electromagnetic valves (14) at their bottoms.

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