A pre-mixed concrete intelligent sampling and working performance monitoring device

Abstract

The application discloses a kind of pre-mixed concrete intelligent sampling and working performance monitoring device, including power system, sampling system, test system, determination system and cleaning system;Wherein sampling system is set to the test system directly above, wherein sampling system includes rounded trapezoidal sampling bucket with gate, test system is located below the sampling bucket for receiving and sample recovery, and the determination system is used to detect the slump and spread of concrete sample in the sampling system.The application realizes the automatic sampling and working performance real-time monitoring of pre-mixed concrete in the production process, is convenient to operate, effectively reduces the work pressure of staff, and guarantees product quality, promotes the development of concrete quality control application field, lays a good foundation for intelligent monitoring of building materials, and has significant practical engineering value.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing technology for building materials, specifically to an intelligent sampling and performance monitoring device for ready-mixed concrete. Background Technology

[0002] In civil engineering construction, concrete is typically mixed on-site. However, traditional on-site mixing and pouring methods have drawbacks such as large land area requirements, high noise levels, and significant variations in concrete quality. Therefore, there is an urgent need for a new mixing method to meet the requirements of on-site construction. Ready-mixed concrete, thanks to its high degree of specialization and centralization, improves on-site project quality, streamlines construction procedures, reduces labor intensity, lowers production costs, and also reduces environmental pollution. Ready-mixed concrete is currently the primary choice for civil engineering construction.

[0003] Ready-mixed concrete involves pre-mixing raw materials, admixtures, and water according to a reasonable mix design, and then transporting the concrete to a centralized batching plant via truck pumping. The plant manages and operates the plant centrally. According to GB / T14902-2012, the slump test for ready-mixed concrete is complex and requires sampling at least once for every 100 batches of concrete with the same mix proportion. First, prepare the slump cone and shovel. Place the slump cone on a non-absorbent rigid plate, place the funnel on the slump cone, and step on the pedal. Fill the slump cone with the mixture in three layers, each layer approximately one-third of the cone's height. Each layer is tamped 25 times along a spiral path from the edge to the center, ensuring even distribution on the interface with each tamping. After filling, scrape off excess mixture with a trowel, smooth the cone opening, and remove concrete around the bottom of the cone. Immediately lift the slump cone within 5-10 seconds to prevent lateral and torsional effects on the concrete. The entire process, from loading to the point of use in the slump cone, should be completed within 150 seconds. The entire process is quite complex. On the one hand, quality inspectors need to leave their posts and go to the transport tanker to take samples and conduct tests using a dump truck. On the other hand, the sampling and testing process will interrupt continuous production. Therefore, the current sampling and testing methods have major drawbacks such as cumbersome sampling procedures, long operation time, and low efficiency.

[0004] Therefore, there is an urgent need for a more intelligent sampling and performance monitoring device for ready-mixed concrete, which can more efficiently and accurately test the slump and spread of ready-mixed concrete. Summary of the Invention

[0005] To address the problems existing in the sampling and performance monitoring of ready-mixed concrete, this invention provides an intelligent sampling and performance monitoring device for ready-mixed concrete. This device can simultaneously measure the slump and spread of ready-mixed concrete, and has the advantages of being unmanned and intelligent.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A smart sampling and workability monitoring device for ready-mixed concrete, characterized in that it includes a power system, a sampling system, a testing system, a judgment system, and a cleaning system; wherein the sampling system is located directly above the testing system, and the sampling system includes an inverted frustum-shaped sampling bucket with a gate; the testing system is located below the sampling bucket for receiving materials and recovering samples; and the judgment system is used to detect the slump and spread of concrete samples in the sampling system.

[0008] Furthermore, the testing system includes a receiving box located below the sampling barrel. The receiving box has markings from 180mm to 700mm on its top, with a spacing of 20mm. The side of the receiving box has markings from 0mm to 180mm on its side, with a spacing of 10mm.

[0009] Furthermore, the sampling bucket is located 35mm above the receiving box, rises to 150mm after feeding, and has a discharge time of 5.3s to 10.4s. Its upper diameter is 235mm to 280mm, its height is 140mm to 200mm, its lower diameter is 135mm to 160mm, and its lower opening is equipped with a horizontally rotating gate.

[0010] Furthermore, the power system provides power to the sampling system, testing system, and cleaning system. After the sampling system receives the material, it moves above the testing system and opens the gate below the sampling system. After receiving the material, the data is recorded and uploaded to the judgment system. The cleaning system starts to prepare for the next material receiving.

[0011] Furthermore, the power system includes an electric cylinder, a motor, and a telescopic rod. The motor is located inside the protective cover. The electric cylinder includes a first electric cylinder, a second electric cylinder, a third electric cylinder, and a fourth electric cylinder. The right side of the second electric cylinder is fixed to the protective cover, and a telescopic rod is connected to the cylinder. The telescopic rod is connected to a pull rod on the rear side of the protective cover. The second electric cylinder controls the pushing and sampling of the sampling barrel, which is 1200mm to 1400mm long. The first electric cylinder controls the tilting and pouring of the receiving box, and is connected to the receiving box at its front end and the protective cover at its right side. The third electric cylinder controls the opening and closing of the gate at the bottom of the sampling barrel. The fourth electric cylinder controls the lifting and lowering of the sampling barrel.

[0012] Furthermore, the determination system includes a laser sensor, an intelligent monitoring host, and a computer. The laser sensor collects experimental results on the side of the sampling barrel, uploads the experimental data to the computer for coupling, and the results are positively correlated with national standards. The correlation correction coefficient is determined by experiments and is synchronously fed back through the intelligent monitoring host. An alarm is automatically triggered if the value exceeds the specified value.

[0013] Furthermore, the cleaning system includes a cleaning water gun located directly above the sampling bucket and in the upper right corner of the receiving box. After the experiment is completed, the receiving box is tilted, and the cleaning water gun is activated to clean the experimental residue, preparing for the next receiving.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention, based on Bingham's energy equation and combined with experimental data analysis, determines the method for controlling the concrete outflow time and achieves real-time prediction of concrete workability. It features information-based basic data and intelligent production operation, improving the level of intelligent quality control. It enables automatic sampling and workability monitoring during the ready-mixed concrete production process, ensuring uninterrupted production while guaranteeing the quality of concrete workability testing. The operation is simple and efficient, and the experimental results are clear and accurate. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Appendix Figure 2 This is a schematic diagram showing the dimensions of the receiving bucket of the present invention.

[0018] Appendix Figure 3 This is a schematic diagram of the receiving box structure of the present invention.

[0019] Appendix Figure 4 This is a schematic diagram of the sampling bucket structure of the present invention.

[0020] In the attached image:

[0021] 1-First electric cylinder, 2-Second electric cylinder, 3-Third electric cylinder, 4-Sampling bucket, 5-Cleaning water gun; 6-Receiving box, 7-Base, 8-Protective cover, 9-Pull rod, 10-Laser sensor, 11-Telescopic rod, 12-Fourth electric cylinder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0023] Please refer to the figure. This invention provides a technical solution: an intelligent sampling and workability monitoring device for ready-mixed concrete, comprising a power system, a sampling system, a testing system, a judgment system, and a cleaning system. The sampling system is positioned 35mm directly above the testing system. The sampling system includes an inverted frustum-shaped sampling bucket with a gate. The testing system is located below the sampling bucket for receiving materials and recovering samples. The judgment system is used to detect the slump and spread of the concrete sample in the sampling system. After the sampling system receives material, it moves to 150mm above the testing system and then opens the gate below the sampling system, with a discharge time of 5.3s to 10.4s. After the test is completed, the data is recorded and uploaded to the judgment system, and the cleaning system is started to prepare for the next test.

[0024] In a further preferred embodiment, the testing system includes a receiving box 6 located below the sampling barrel 4, connected to the upper side of the base 7 and the left side of the electric cylinder. The receiving box 6 has markings from 180mm to 700mm with a spacing of 20mm on its top; the side of the receiving box 6 has markings from 0mm to 180mm with a spacing of 10mm. The sampling barrel is located 35mm above the receiving box 6, with a discharge time of 5.3s to 10.4s. Its upper diameter is 235mm to 280mm, its height is 140mm to 200mm, and its lower diameter is 135mm to 160mm. The lower opening is equipped with a horizontally rotating gate. The power system provides power to the sampling system, testing system, and cleaning system. After the sampling system receives material, it moves to a position 150mm above the testing system, opens the lower gate of the sampling system, records and uploads the data to the judgment system after receiving the material, and the cleaning system starts to prepare for the next receiving operation. The power system includes an electric cylinder, a motor, and a telescopic rod 11. The motor is located inside the protective cover 8. The electric cylinder includes a first electric cylinder 1, a second electric cylinder 2, a third electric cylinder 3, and a fourth electric cylinder 12. The second electric cylinder 2 is fixed to the protective cover 8 on its right side, and the telescopic rod 11 is connected to the cylinder of the second electric cylinder 2. The telescopic rod 11 is connected to the pull rod 9 on the rear side of the protective cover 8. The second electric cylinder 2 controls the pushing and sampling of the sampling barrel 4, which is 1200mm to 1400mm long. The first electric cylinder 1 controls the tilting and pouring of the receiving box 6, and is connected to the receiving box 6 at its front end and the protective cover 8 on its right side. The third electric cylinder 3 controls the opening and closing of the bottom gate of the sampling barrel 4. The fourth electric cylinder 12 controls the raising and lowering of the sampling barrel 4. The judgment system includes a laser sensor 10, an intelligent monitoring host, and a computer. The laser sensor 10 collects experimental results from the side of the sampling barrel, uploads the experimental data to the computer for coupling, and the results are positively correlated with national standards. The correlation correction coefficient is determined experimentally and is synchronously fed back through the intelligent monitoring host. An alarm is automatically triggered if the specified value is exceeded. The cleaning system includes a cleaning water gun 5, located directly above the sampling tank and at the upper right corner of the receiving box 6. After the experiment, the receiving box 6 is tilted, and the cleaning water gun 5 is activated to clean away any experimental residues, preparing for the next sample collection. (Refer to...) Figure 1The invention device consists of a power system, a sampling system, a testing system, a cleaning system, and a judgment system.

[0025] like Figure 2 As shown, the sampling barrel is an inverted frustum shape with a gate at the bottom. The sampling barrel is fixed to the second cylinder and is made of stainless steel. A horizontally rotating gate is located at the bottom. The sampling barrel has a volume of v4. 1 5.5×10 6 mm, assuming the bottom of the bucket is at ground level, where z1 is the initial height equal to h, z2 is the final height equal to 0, α1 and α2 are kinetic energy correction coefficients equal to 1, the material is in contact with air, then p1 is the initial pressure equal to 0, p2 is the final pressure equal to 0, the initial velocity V1 = 0, and V2 is the velocity of the finished concrete flowing out of the bottom, m / s; R e The Reynolds number is 9.8 m / s². The gravitational acceleration g is 9.8 m / s². 2 l represents the incline height of the sampling container, in meters; the viscosity coefficient μ is ≥ 150 Pa·s; and the density ρ is 2400 kg / m³. 3 h is the height of the sampling container, in meters; R is the upper radius of the sampling container, in meters; r is the lower radius of the sampling container, in meters; v 1 m is the volume of the sampling bucket. 3 S is the area of ​​the lower opening, in meters. 2 t is time, in seconds; λ is the friction factor; π is pi; Q is the flow rate, in cubic meters per second. 3 / s; d is the inner diameter of the bottom opening of the sampling bucket, in meters. Then the relationship between feeding time and feed size (I) is:

[0026]

[0027]

[0028] From formulas (1)(2)(3), we get:

[0029]

[0030]

[0031] From formulas (4) and (5), we get:

[0032]

[0033]

[0034] From the above formula, we can obtain:

[0035]

[0036] In the above formulas: Head loss formula The calculation and formula require 1≈h, therefore the dimensional requirements are... The measured installation and operating space requirement is h < 200mm. The experimental correlation and production requirement time is 5.3–10.4s. The slump and spread on receiving box 6 are determined by the concrete properties and the final velocity of the concrete falling onto receiving box 6. The final velocity is determined by the outflow velocity from the bottom of the sampling bucket and the working height of the sampling bucket. The height is 150mm, so the final velocity is determined by the outflow velocity. The outflow time determines the outflow velocity. If the outflow velocity is less than 5.3s, it is too fast, and the energy loss in the collision between different parts of the concrete and the receiving box is inconsistent, resulting in a large error in the experimental results and no correlation. At 5.3s and 10.4s, the test results according to the national standard "Ready-Mixed Concrete" GB / T14902-2012 are positively correlated with the test results of this device. Therefore, the time is positively correlated when it is between 5.3 and 10.4s. If it is greater than 10.4s, the outflow velocity is too slow, the outflow is discontinuous, the experimental results are too errory, and no correlation is found. Therefore, the time limit is 5.3–10.4s.

[0037]

[0038] The upper diameter calculated from the formula is 280mm, the height is 140mm, and the lower diameter is 160mm.

[0039]

[0040] The upper diameter calculated from the formula is 235mm, the height is 200mm, and the lower diameter is 135mm.

[0041] Therefore, the size is limited to an upper diameter of 235mm to 280mm, a height of 140mm to 200mm, and a lower diameter of 135mm to 160mm.

[0042] Example 1

[0043] The technical solution of this invention patent will be further explained in conjunction with the accompanying drawings.

[0044] The method of using the intelligent sampling and workability monitoring device for ready-mixed concrete using the above technical solution, based on the theoretical formula (I), calculates the feed volume to be 5.5 × 10⁻⁶. 6The sample bucket has an upper diameter of 390mm, a height of 80mm, and a lower diameter of 200mm. The feeding time is 2.3s. The sample bucket is pushed to the finished concrete discharge port to receive the material. The sample bucket is then pulled back to a position above the receiving box 6, with a clearance height of 35mm. The sample bucket is then raised vertically to 150mm above the receiving box 6. The gate at the bottom of the sample bucket is opened, and the finished concrete falls naturally into the receiving box 6 below. After the finished concrete has fully expanded in the receiving box 6, the laser sensor 10 scans it. The scan data is used for later analysis of the expansion and slump of the finished concrete. After the sample bucket has finished falling, it is pushed away from the position above the receiving box 6 to ensure that the receiving box 6 has sufficient space to flip. The receiving box 6 is tilted downwards to pour the sample back into the recycling area. The cleaning water gun 5 is turned on to clean the sample bucket and the receiving box 6. After cleaning, the sample bucket and the receiving box 6 are reset. After the initial screening of the system, the quality inspector judges the working performance through the terminal connected to the laser sensor 10.

[0045]

[0046] Example 2

[0047] The technical solution of this invention patent will be further explained in conjunction with the accompanying drawings.

[0048] The method of using the intelligent sampling and workability monitoring device for ready-mixed concrete using the above technical solution, based on the theoretical formula (I), calculates the feed volume to be 5.5 × 10⁻⁶. 6 The sample bucket has an upper diameter of 280mm, a height of 140mm, and a lower diameter of 160mm. The feeding time is 5.3s. The sample bucket is pushed to the finished concrete discharge port to receive the material. The sample bucket is then pulled back to a position above the receiving box 6, with a clearance height of 35mm. The sample bucket is then raised vertically to 150mm above the receiving box 6. The gate at the bottom of the sample bucket is opened, and the finished concrete falls naturally into the receiving box 6 below. After the finished concrete has fully expanded in the receiving box 6, the laser sensor 10 scans it. The scan data is used for later analysis of the expansion and slump of the finished concrete. After the sample bucket has finished falling, it is pushed away from the position above the receiving box 6 to ensure that the receiving box 6 has sufficient space to flip. The receiving box 6 is tilted downwards to pour the sample back into the recycling area. The cleaning water gun 5 is turned on to clean the sample bucket and the receiving box 6. After cleaning, the sample bucket and the receiving box 6 are reset. After the initial screening of the system, the quality inspector judges the working performance through the terminal connected to the laser sensor 10.

[0049]

[0050]

[0051] Example 3

[0052] The technical solution of this invention patent will be further explained in conjunction with the accompanying drawings.

[0053] The method of using the intelligent sampling and workability monitoring device for ready-mixed concrete using the above technical solution, based on the theoretical formula (I), calculates the feed volume to be 5.5 × 10⁻⁶. 6 The sample collection container has an upper diameter of 250mm, a height of 175mm, and a lower diameter of 150mm. The feeding time is 6.9s. The sampling bucket is pushed to the finished concrete discharge port to receive the material. The sampling bucket is then pulled back to a position above the receiving box 6, with a clearance height of 35mm. The sampling bucket rises vertically to 150mm above the receiving box 6, and the bottom gate of the sampling bucket opens, allowing the finished concrete to fall naturally into the receiving box 6. After the finished concrete has fully expanded in the receiving box 6, the laser sensor 10 scans it. The scan data is used for later analysis of the expansion and slump of the finished concrete. After the sampling bucket has finished dropping, it is pushed away from the position above the receiving box 6, ensuring that the receiving box 6 has sufficient space to flip. The receiving box 6 is tilted downwards, and the sample is poured back into the recycling area. The cleaning water gun 5 is turned on to clean the sampling bucket and the receiving box 6. After cleaning, the sampling bucket and the receiving box 6 are reset. After initial screening, quality inspectors judge the working performance through a terminal connected to the laser sensor 10.

[0054]

[0055] Example 4

[0056] The technical solution of this invention patent will be further explained in conjunction with the accompanying drawings.

[0057] The method of using the intelligent sampling and workability monitoring device for ready-mixed concrete using the above technical solution, based on the theoretical formula (I), calculates the feed volume to be 5.5 × 10⁻⁶. 6 The sample bucket has an upper diameter of 235mm, a height of 200mm, and a lower diameter of 135mm. The feeding time is 10.4s. The sample bucket is pushed to the finished concrete discharge port to receive the material. The sample bucket is then pulled back to a position above the receiving box 6, with a clearance height of 35mm. The sample bucket is then raised vertically to 150mm above the receiving box 6. The gate at the bottom of the sample bucket is opened, and the finished concrete falls naturally into the receiving box 6 below. After the finished concrete has fully expanded in the receiving box 6, the laser sensor 10 scans it. The scan data is used for later analysis of the expansion and slump of the finished concrete. After the sample bucket has finished dropping the material, it is pushed away from the position above the receiving box 6 to ensure that the receiving box 6 has sufficient space to flip over. The receiving box 6 is tilted downwards to pour the sample back into the recycling area. The cleaning water gun 5 is turned on to clean the sample bucket and the receiving box 6. After cleaning, the sample bucket and the receiving box 6 are reset. After the initial screening of the system, the quality inspector judges the working performance through the terminal connected to the laser sensor 10.

[0058]

[0059] Example 5

[0060] The technical solution of this invention patent will be further explained in conjunction with the accompanying drawings.

[0061] The method of using the intelligent sampling and workability monitoring device for ready-mixed concrete using the above technical solution, based on the theoretical formula (I), calculates the feed volume to be 5.5 × 10⁻⁶. 6 The sample bucket has an upper diameter of 390mm, a height of 100mm, and a lower diameter of 120mm. The feeding time is 16.8s. The sample bucket is pushed to the finished concrete discharge port to receive the material. The sample bucket is then pulled back to a position above the receiving box 6, with a clearance height of 35mm. The sample bucket is then raised vertically to 150mm above the receiving box 6. The gate at the bottom of the sample bucket is opened, and the finished concrete falls naturally into the receiving box 6 below. After the finished concrete has fully expanded in the receiving box 6, the laser sensor 10 scans it. The scan data is used for later analysis of the expansion and slump of the finished concrete. After the sample bucket has finished falling, it is pushed away from the position above the receiving box 6 to ensure that the receiving box 6 has sufficient space to flip. The receiving box 6 is tilted downwards to pour the sample back into the recycling area. The cleaning water gun 5 is turned on to clean the sample bucket and the receiving box 6. After cleaning, the sample bucket and the receiving box 6 are reset. After the initial screening of the system, the quality inspector judges the working performance through the terminal connected to the laser sensor 10.

[0062]

[0063] As can be seen from the above examples, the dimensions of the receiving buckets in Examples 1 and 5 do not meet the requirements and exceed the specified dimensions, so the correction coefficients cannot be unified. The dimensions in Examples 2-4 meet the requirements and do not exceed the specified dimensions; their correction coefficients are unified and the results are positively correlated with the national standard.

[0064] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A smart sampling and workability monitoring device for ready-mixed concrete, characterized in that: It includes a power system, a sampling system, a testing system, a judgment system, and a cleaning system; wherein the sampling system is located directly above the testing system, and the sampling system includes an inverted frustum-shaped sampling bucket with a gate; the testing system is located below the sampling bucket for receiving materials and recovering samples; and the judgment system is used to detect the slump and spread of concrete samples in the sampling system. The judgment system includes a laser sensor, an intelligent monitoring host, and a computer. The laser sensor collects experimental results on the side of the sampling barrel, uploads the experimental data to the computer for coupling, and the results are positively correlated with the national standard. The correlation correction coefficient is determined by the experiment and is synchronously fed back through the intelligent monitoring host. An alarm is automatically triggered if the value exceeds the specified value. The power system provides power to the sampling system, testing system, and cleaning system. After the sampling system receives material, it moves above the testing system, opens the gate below the sampling system, records and uploads the data to the judgment system after receiving the material, and the cleaning system starts to prepare for the next receiving. The power system includes an electric cylinder, a motor, and a telescopic rod. The motor is located inside the protective cover. The electric cylinder includes a first electric cylinder, a second electric cylinder, a third electric cylinder, and a fourth electric cylinder. The right side of the second electric cylinder is fixed to the protective cover, and a telescopic rod is connected to the cylinder. The telescopic rod is connected to a pull rod on the rear side of the protective cover. The second electric cylinder controls the pushing and sampling of the sampling barrel, which is 1200mm to 1400mm long. The first electric cylinder controls the tilting and pouring of the receiving box, and is connected to the receiving box at its front end and the protective cover at its right side. The third electric cylinder controls the opening and closing of the gate at the bottom of the sampling barrel. The fourth electric cylinder controls the raising and lowering of the sampling barrel. The cleaning system includes a cleaning water gun, which is located directly above the sampling bucket and in the upper right corner of the receiving box. After the experiment is completed, the receiving box is tilted, the cleaning water gun is activated to clean the experimental residue, and the system is ready for the next sample collection. The sampling bucket is located 35mm above the receiving box. After feeding, it rises to 150mm and the discharge time is 5.3s to 10.4s. Its upper diameter is 235mm to 280mm, its height is 140mm to 200mm, its lower diameter is 135mm to 160mm, and its lower opening is equipped with a horizontally rotating gate.

2. The intelligent sampling and workability monitoring device for ready-mixed concrete according to claim 1, characterized in that: The testing system includes a receiving box located below the sampling barrel. The receiving box has markings from 180mm to 700mm on its top, with a spacing of 20mm. The receiving box also has markings from 0mm to 180mm on its side, with a spacing of 10mm.

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