Concrete batching plant for recycled aggregate concrete production

Abstract

This utility model discloses a concrete batching machine for producing recycled aggregate concrete, including a main feeding structure, a metering mechanism, a feeding cylinder, and an adjusting mechanism. A funnel is mounted on one end of the top of the main feeding structure via a bracket. The metering mechanism is positioned above the funnel. A first servo motor is fixed to the top of one side of the bracket, and the output of the first servo motor is connected to the metering mechanism via a rotating shaft. This utility model, by setting a metering mechanism including a trough, a weighing plate, and pressure sensors, can accurately weigh recycled aggregate concrete. The pressure sensors are located at the four corners inside the trough to ensure the accuracy and uniformity of the weighing data. When the set weight value is reached, the first servo motor drives the rotating shaft and the trough to rotate, causing the recycled aggregate concrete to automatically fall into the funnel and enter the feeding cylinder through a corrugated pipe, improving weighing accuracy and achieving automatic batching.

Description

Technical Field

[0001] This utility model relates to the field of recycled aggregate concrete processing technology, specifically a concrete batching machine for recycled aggregate concrete production. Background Technology

[0002] With the construction industry's deepening implementation of the "green and low-carbon" concept, recycled aggregate concrete, with its core advantages of "resource utilization of construction waste and reduction of natural aggregate consumption," has become an important green building material to replace traditional concrete. In the production process of recycled aggregate concrete, the batching stage is a key process that determines its mechanical properties (such as compressive strength and flexural strength) and workability (such as fluidity and workability). It requires the precise mixing of raw materials such as recycled aggregate, cement, sand, water, and admixtures. Any deviation in the proportion may lead to quality problems such as insufficient concrete strength and increased risk of cracking, and may even affect the structural safety of buildings.

[0003] However, the traditional batching machines currently used in the production of recycled aggregate concrete are limited by technical design defects and are difficult to adapt to the characteristics of recycled aggregates themselves. In practical applications, they have exposed many technical bottlenecks that urgently need to be solved, specifically in the following aspects: Traditional concrete batching machines mostly adopt "volume-based metering". Volume-based metering relies on hoppers or bins with fixed volumes and indirectly determines the weight by controlling the filling volume of raw materials. However, due to the uneven particle size distribution and large porosity differences of recycled aggregates, the actual weight fluctuation under the same volume can reach 10%-15%, which can easily lead to deviations in aggregate proportions.

[0004] The quality of recycled aggregate concrete depends not only on precise proportioning but also on the uniformity of raw material mixing. Uneven mixing of recycled aggregate with cement, sand, and other raw materials can easily lead to "localized aggregate enrichment" or "localized excessively thin cement paste," resulting in uneven internal structure after concrete hardening, decreased compressive strength, and increased risk of shrinkage cracking. Traditional batching machines operate on an independent "batch-transport" basis: raw materials are directly fed into the mixing unit after being quantitatively measured, lacking a pre-mixing mechanism during transport. Furthermore, due to the irregular particle shape of recycled aggregate, "bridging" or "stratification" easily occurs within the transport pipeline, further exacerbating uneven mixing.

[0005] Therefore, developing a batching machine for recycled aggregate concrete production with high-precision quantitative control, high adaptability, premixing function, and automated operation has become an urgent need to promote the industrial application of recycled aggregate concrete technology. Utility Model Content

[0006] The purpose of this utility model is to provide a concrete batching machine for producing recycled aggregate concrete, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a concrete batching machine for producing recycled aggregate concrete, comprising a feeding structure main body, a metering mechanism, a feeding cylinder and an adjusting mechanism, wherein a funnel is provided at one end of the top of the feeding structure main body via a bracket, the metering mechanism is located above the funnel, a first servo motor is fixed at the top of one side of the bracket, and the output end of the first servo motor is connected to the metering mechanism via a rotating shaft; The feeding cylinder is located at the center of the top of the feeding structure body, and one end of the top of the feeding cylinder is connected to the bottom of the funnel through a corrugated pipe. The adjustment mechanism is located at the bottom of the feeding cylinder away from the support, and the end of the feeding cylinder close to the support is rotatably connected to the feeding structure body through a rotating frame.

[0008] Preferably, the quantitative mechanism includes a tank, a weighing plate, and pressure sensors. The weighing plate is located at the bottom of the tank, and pressure sensors are installed at the four corners of the tank. The bottom of the weighing plate is connected to the pressure sensors.

[0009] Preferably, the quantitative mechanism further includes a column, which is disposed below the weighing plate on one side of the pressure sensor.

[0010] Preferably, the feed cylinder is provided with a roller inside, and the roller is provided with helical blades evenly distributed. Furthermore, the inner wall of the feed cylinder between adjacent helical blades is provided with turbulence blocks, and the surface of the turbulence blocks is provided with grinding protrusions evenly.

[0011] Preferably, a second servo motor is fixed to one end of the feeding cylinder, and the output end of the second servo motor is connected to the roller.

[0012] Preferably, the adjusting mechanism includes a guide rod and a guide sleeve, the guide rod being disposed at the bottom of the feeding cylinder, and the guide sleeve being fitted onto the guide rod.

[0013] Preferably, the adjusting mechanism further includes a cylinder and a rotating component, and the output end of the cylinder is connected to the guide sleeve through the rotating component.

[0014] This utility model relates to a concrete batching machine for producing recycled aggregate concrete, which has significant advantages over the prior art, specifically in the following aspects: 1. This utility model, by setting a quantitative mechanism including a tank, a weighing plate, and pressure sensors, enables precise weighing of recycled aggregate concrete. The pressure sensors are located at the four corners inside the tank to ensure the accuracy and uniformity of the weighing data. When the set weight value is reached, the first servo motor drives the rotating shaft and the tank to rotate, causing the recycled aggregate concrete to automatically fall into the funnel and enter the feeding cylinder through the corrugated pipe. This improves the accuracy of weighing and also achieves automatic batching, greatly enhancing production efficiency and the accuracy of the proportioning.

[0015] 2. Due to the precise weighing function of the quantitative mechanism, this utility model can easily adjust the weight of the feed according to the different characteristics of recycled aggregate concrete, meet diverse proportioning requirements, make the production process more flexible and efficient, adapt to the specific requirements of different engineering projects, and improve the applicability and market competitiveness of the product.

[0016] 3. The rollers inside the feeding cylinder are evenly equipped with spiral blades, which ensure thorough mixing during the conveying of recycled aggregate concrete. The spiral blade design ensures uniform mixing of materials during conveying, avoiding the unstable concrete quality problems caused by uneven mixing in traditional equipment. In addition, turbulence blocks are evenly arranged on the inner wall of the feeding cylinder between adjacent spiral blades. The evenly distributed grinding protrusions on the surface of the turbulence blocks further enhance the mixing effect, ensuring the uniformity and consistency of the recycled aggregate concrete. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a partial cross-sectional structural diagram of the quantitative mechanism of this utility model; Figure 4 This is a partial cross-sectional structural diagram of the feeding cylinder of this utility model.

[0018] In the diagram: 1. Main feeding structure; 2. Support; 3. Corrugated pipe; 4. Funnel; 5. First servo motor; 6. Rotating shaft; 7. Measuring mechanism; 701. Tank; 702. Weighing plate; 703. Column; 704. Pressure sensor; 8. Feeding cylinder; 801. Turbulence block; 802. Grinding protrusion; 9. Second servo motor; 10. Adjustment mechanism; 1001. Cylinder; 1002. Guide rod; 1003. Rotating component; 1004. Guide sleeve; 11. Roller; 12. Spiral blade. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Please see Figure 1-4 An embodiment of this utility model is provided: a concrete batching machine for producing recycled aggregate concrete, including a feeding structure body 1, a metering mechanism 7, a feeding cylinder 8 and an adjusting mechanism 10. A funnel 4 is provided at one end of the top of the feeding structure body 1 through a bracket 2. The metering mechanism 7 is located above the funnel 4. A first servo motor 5 is fixed at the top of one side of the bracket 2, and the output end of the first servo motor 5 is connected to the metering mechanism 7 through a rotating shaft 6.

[0021] The main body 1 of the feeding structure is the foundation of the batching machine and is made of high-strength steel to ensure the stability and durability of the overall structure. The top of the main body 1 is designed as a flat bearing surface to facilitate the installation and fixing of other components.

[0022] The support bracket 2 is fixed to one end of the top of the main body 1 of the feeding structure, and adopts a triangular structure design to enhance support and stability. The support bracket 2 is made of high-quality stainless steel, which has good corrosion resistance and load-bearing capacity.

[0023] The funnel 4 is mounted on the top end of the main body 1 of the feeding structure via the bracket 2. The opening of the funnel 4 faces upward, and the bottom is tapered to facilitate the smooth flow of material into the metering mechanism 7. The inner wall of the funnel 4 is smooth and made of wear-resistant material to reduce friction and loss of material during the flow process.

[0024] The metering mechanism 7 is located above the funnel 4, and its main function is to accurately measure the recycled aggregate. The metering mechanism 7 includes a metering chamber and a control system. The volume of the metering chamber can be adjusted as needed, and the control system uses high-precision sensors and a microprocessor to ensure metering accuracy.

[0025] The first servo motor 5 is fixed to the top of one side of the bracket 2. It is a high-torque servo motor to ensure the stability and accuracy of driving the metering mechanism 7. The output end of the servo motor 5 is connected to the metering mechanism 7 through a rotating shaft 6. The rotating shaft 6 is made of high-strength alloy material and has good torsional resistance.

[0026] The rotating shaft 6 is a key component connecting the first servo motor 5 and the metering mechanism 7. Its two ends are connected to the output end of the servo motor 5 and the drive part of the metering mechanism 7, respectively. The design of the rotating shaft 6 should ensure high transmission efficiency and resistance to wear during long-term operation.

[0027] The quantitative mechanism 7 includes a tank 701, a weighing plate 702, and a pressure sensor 704. The weighing plate 702 is located at the bottom of the tank 701, and a pressure sensor 704 is installed at each of the four corners inside the tank 701. The bottom of the weighing plate 702 is connected to the pressure sensor 704.

[0028] The quantitative mechanism 7 also includes a column 703, which is located below the weighing plate 702 on one side of the pressure sensor 704.

[0029] The quantitative mechanism 7 mainly includes components such as a tank 701, a weighing plate 702, a column 703, and a pressure sensor 704.

[0030] Tank 701: Tank 701 is a container for holding materials. It is rectangular in shape with a sufficiently large internal space to facilitate the storage and weighing of materials. The preferred material for tank 701 is stainless steel to ensure its corrosion resistance and strength.

[0031] Weighing plate 702: The weighing plate 702 is located at the bottom of the tank 701 and is used to support the material. The weighing plate 702 is preferably made of high-strength aluminum alloy, which is both lightweight and has sufficient load-bearing capacity. The dimensions of the weighing plate 702 are matched to the inner bottom area of ​​the tank 701 to ensure that the material is evenly distributed on it.

[0032] Pressure sensor 704: Pressure sensors 704 are installed at the four corners inside the tank 701 to detect the weight of the material on the weighing plate 702. Each pressure sensor 704 is fixed to the inner wall of the tank 701 with bolts to ensure its positional stability.

[0033] The output signal of the pressure sensor 704 is connected to the control unit via a wire to monitor the weight of the material in real time.

[0034] Column 703: Column 703 is located below the weighing plate 702 on one side of the pressure sensor 704 to support the weighing plate 702 and ensure its horizontal position. Column 703 is preferably made of stainless steel to ensure its strength and corrosion resistance. The height of column 703 is adjustable via a threaded structure to allow for adjustment as needed.

[0035] The feeding cylinder 8 is located at the center of the top of the feeding structure body 1, and one end of the top of the feeding cylinder 8 is connected to the bottom of the funnel 4 through the corrugated pipe 3.

[0036] The feed cylinder 8 is equipped with a roller 11, and spiral blades 12 are evenly distributed on the roller 11. The inner wall of the feed cylinder 8 between adjacent spiral blades 12 is evenly provided with turbulence blocks 801, and the surface of the turbulence blocks 801 is evenly provided with grinding protrusions 802.

[0037] A second servo motor 9 is fixed at one end of the feeding cylinder 8, and the output end of the second servo motor 9 is connected to the roller 11.

[0038] The feeding cylinder 8 is located at the center of the top of the feeding structure body 1. Specifically, the bottom of the feeding cylinder 8 is securely connected to the top of the feeding structure body 1 by a fixing device to ensure the stability of the feeding cylinder 8 during operation. One end of the top of the feeding cylinder 8 is connected to the bottom of the funnel 4 through a bellows pipe 3. The bellows pipe 3 serves to buffer and connect, giving the connection between the feeding cylinder 8 and the funnel 4 a certain degree of flexibility, allowing it to adapt to changes in different angles and positions.

[0039] Inside the feeding cylinder 8, a roller 11 is installed. The roller 11 is located at the central axis of the feeding cylinder 8, and its two ends are fixed to the inner wall of the feeding cylinder 8 by bearings to ensure smooth rotation of the roller 11. Several helical blades 12 are evenly distributed on the roller 11. These helical blades 12 extend along the length of the roller 11 and are arranged in a helical shape. The spacing between adjacent helical blades 12 is designed to ensure that the material is evenly distributed during the conveying process.

[0040] On the inner wall of the feeding cylinder 8 between adjacent spiral blades 12, several turbulence blocks 801 are evenly arranged. The function of the turbulence blocks 801 is to increase the disturbance of the material during the conveying process, prevent the material from adhering to the cylinder wall, and improve the conveying efficiency. The surface of the turbulence blocks 801 is evenly provided with grinding protrusions 802, which can slightly grind the material and further promote the uniform mixing of the material.

[0041] A second servo motor 9 is fixed to one end of the feeding cylinder 8. The second servo motor 9 is connected to the outer wall of the feeding cylinder 8 through a fixed bracket to ensure that the motor remains stable during operation. The output end of the second servo motor 9 is connected to the roller 11 through a transmission device, thereby driving the roller 11 and the spiral blades 12 on it to rotate.

[0042] The adjustment mechanism 10 is located at the bottom of the feeding cylinder 8 away from the support 2, and the end of the feeding cylinder 8 near the support 2 is rotatably connected to the feeding structure body 1 through a rotating frame.

[0043] The adjusting mechanism 10 includes a guide rod 1002 and a guide sleeve 1004. The guide rod 1002 is located at the bottom of the feeding cylinder 8, and the guide sleeve 1004 is sleeved on the guide rod 1002.

[0044] The adjustment mechanism 10 also includes a cylinder 1001 and a rotating component 1003, and the output end of the cylinder 1001 is connected to the guide sleeve 1004 through the rotating component 1003.

[0045] The guide rod 1002 has a cylindrical structure and is made of high-strength stainless steel to ensure its stability and durability during long-term use. One end of the guide rod 1002 is fixed to the bottom of the feed cylinder 8, and the other end extends to the outside of the adjusting mechanism 10. The surface of the guide rod 1002 is precision machined to ensure that the guide sleeve 1004 can move smoothly on it.

[0046] The guide sleeve 1004 is a cylindrical sleeve made of wear-resistant plastic or lightweight alloy. The inner diameter of the guide sleeve 1004 is slightly larger than the outer diameter of the guide rod 1002 to ensure a suitable gap between them, providing good guidance while reducing friction. The outer side of the guide sleeve 1004 has multiple annular grooves for connecting with the rotating component 1003.

[0047] Cylinder 1001 is a double-acting cylinder with an aluminum alloy cylinder body and a stainless steel piston rod. The air inlet of cylinder 1001 is connected to a compressed air source, and the extension and retraction of the piston rod are achieved by controlling the intake and exhaust. The output end of cylinder 1001 is connected to guide sleeve 1004 via rotating component 1003.

[0048] The rotating component 1003 is an L-shaped connector made of high-strength alloy steel. One end of the rotating component 1003 has a threaded hole for connecting with the piston rod of the cylinder 1001; the other end has an annular structure that fits into the outer annular groove of the guide sleeve 1004. The design of the rotating component 1003 ensures that the linear motion of the cylinder 1001 can be converted into the up-and-down movement of the guide sleeve 1004.

[0049] Working principle: The operator first checks the fixed status of the main body 1 of the feeding structure to ensure that the support 2, feeding cylinder 8 and adjusting mechanism 10 are not loose. Then, the operator turns on the main power of the equipment, inputs the proportion parameters of recycled aggregate concrete (such as the target weight of raw materials such as recycled aggregate and cement) through the control unit, and calibrates the pressure sensor 704 of the quantitative mechanism 7. At this time, the weighing plate 702 is kept horizontal under the support of the column 703, and the pressure sensor 704 is zeroed to ensure the subsequent weighing accuracy.

[0050] The recycled aggregate to be batched is poured into the trough 701 of the metering mechanism 7. The raw material falls onto the weighing plate 702. Pressure sensors 704 at the four corners inside the trough 701 detect the pressure on the weighing plate 702 in real time and transmit the weight signal to the control unit. When the weight reaches the set value, the control unit automatically triggers the first servo motor 5 to start. The first servo motor 5 drives the trough 701 to rotate through the rotating shaft 6, so that all the metered raw material in the trough 701 is poured into the funnel 4 below. The raw material slides down the inner wall of the funnel 4, is buffered by the corrugated pipe 3, and then smoothly enters the feeding cylinder 8, completing a single metered weighing and unloading.

[0051] After the raw materials enter the feeding cylinder 8, the control unit starts the second servo motor 9. The second servo motor 9 drives the roller 11 inside the feeding cylinder 8 to rotate. The spiral blades 12 on the surface of the roller 11 rotate synchronously with it, conveying the raw materials forward along the length of the feeding cylinder 8. During the conveying process, the spiral blades 12 perform preliminary stirring of the raw materials. At the same time, on the inner wall of the feeding cylinder 8 between adjacent spiral blades 12, the turbulence blocks 801 prevent the raw materials from moving directly with the spiral blades 12, forcing the raw materials to be disturbed. The grinding protrusions 802 on the surface of the turbulence blocks 801 then perform slight grinding of the raw materials, further breaking up the agglomeration of the raw materials and ensuring that the recycled aggregate is fully mixed with other raw materials to form a uniform premix.

[0052] According to the feeding height or position requirements of the subsequent mixing host, the operator can adjust the adjusting mechanism 10 through the control unit to start the cylinder 1001. The piston rod of the cylinder 1001 extends and retracts, driving the guide sleeve 1004 to slide up and down along the guide rod 1002 through the rotating part 1003. Since the end of the feeding cylinder 8 near the support 2 is rotatably connected to the main body of the feeding structure 1 through the rotating frame, the movement of the guide sleeve 1004 will cause the end of the feeding cylinder 8 away from the support 2 to flip up and down, thereby adjusting the tilt angle of the feeding cylinder 8. When the angle is adjusted to the appropriate position, the roller 11 continues to drive the spiral blade 12 to rotate, pushing the premix to the discharge end of the feeding cylinder 8, and finally discharging it into the subsequent mixing host, completing the conveying and unloading of a single batch of materials.

[0053] After a single batch of ingredients is prepared, the control unit controls the first servo motor 5 to reverse, driving the tank 701 to return to a horizontal state, and the pressure sensor 704 returns to zero; at the same time, the second servo motor 9 and the cylinder 1001 are turned off, and the angle of the feeding cylinder 8 remains stable or returns to the initial position.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete batching machine for producing recycled aggregate concrete, comprising a main feeding structure (1), a quantitative mechanism (7), a feeding cylinder (8), and an adjusting mechanism (10), characterized in that: The feeding structure body (1) has a funnel (4) at one end of the top through a bracket (2), and the quantitative mechanism (7) is located above the funnel (4). A first servo motor (5) is fixed at the top of one side of the bracket (2), and the output end of the first servo motor (5) is connected to the quantitative mechanism (7) through a rotating shaft (6). The feeding cylinder (8) is located at the center of the top of the feeding structure body (1), and one end of the top of the feeding cylinder (8) is connected to the bottom of the funnel (4) through the corrugated pipe (3). The adjustment mechanism (10) is located at the bottom of the feeding cylinder (8) away from the support (2), and the end of the feeding cylinder (8) close to the support (2) is rotatably connected to the feeding structure body (1) through the rotating frame.

2. The concrete batching machine for producing recycled aggregate concrete according to claim 1, characterized in that: The quantitative mechanism (7) includes a tank (701), a weighing plate (702), and a pressure sensor (704). The weighing plate (702) is located at the bottom of the tank (701), and a pressure sensor (704) is provided at each of the four corners of the tank (701). The bottom of the weighing plate (702) is connected to the pressure sensor (704).

3. A concrete batching machine for producing recycled aggregate concrete according to claim 2, characterized in that: The quantitative mechanism (7) also includes a column (703), and the column (703) is located below the weighing plate (702) on one side of the pressure sensor (704).

4. A concrete batching machine for producing recycled aggregate concrete according to claim 1, characterized in that: The feed cylinder (8) is provided with a roller (11) inside, and spiral blades (12) are evenly distributed on the roller (11). The inner walls of the feed cylinder (8) between adjacent spiral blades (12) are evenly provided with turbulence blocks (801), and the surface of the turbulence blocks (801) is evenly provided with grinding protrusions (802).

5. A concrete batching machine for producing recycled aggregate concrete according to claim 4, characterized in that: One end of the feeding cylinder (8) is fixed with a second servo motor (9), and the output end of the second servo motor (9) is connected to the roller (11).

6. A concrete batching machine for producing recycled aggregate concrete according to claim 1, characterized in that: The adjustment mechanism (10) includes a guide rod (1002) and a guide sleeve (1004). The guide rod (1002) is located at the bottom of the feed cylinder (8), and the guide sleeve (1004) is fitted on the guide rod (1002).

7. A concrete batching machine for producing recycled aggregate concrete according to claim 6, characterized in that: The adjustment mechanism (10) further includes a cylinder (1001) and a rotating component (1003), and the output end of the cylinder (1001) is connected to the guide sleeve (1004) through the rotating component (1003).

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