Device for automatically measuring bleeding rate of concrete

Abstract

The utility model discloses an automatic concrete bleeding rate measuring device, and relates to the technical field of concrete detection, a measuring cylinder is arranged on a vibrating table, a cylinder cover is arranged at the top of the measuring cylinder, a glass window is arranged on one side of the measuring cylinder, a camera is arranged on one side of the glass window, and the camera is connected to the cylinder cover through a fixing rod. A water pumping mechanism is further arranged on the barrel cover, and the vibrating table, the camera and the water pumping mechanism are all electrically connected with the main controller. According to the device for automatically measuring the bleeding rate of the concrete, the camera is used for shooting and judging whether a bleeding layer exists in the measuring cylinder or not so as to judge whether water needs to be pumped, meanwhile, the resistive sensor is used for accurately controlling the bottom end of the water conveying hard pipe to only make contact with the water surface, and therefore it is guaranteed that bleeding rather than cement in the concrete is pumped; accurate measurement results are guaranteed, measurement operation is automatic, tedious manual operation is avoided, and influences of human factors are reduced.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and more specifically, to an automatic device for measuring concrete bleeding rate. Background Technology

[0002] Currently, most methods for measuring the bleeding rate of concrete mixtures require manual observation and data recording, which is cumbersome and susceptible to human error, leading to inaccurate results. Furthermore, bleeding rate measurements are significantly affected by environmental factors such as temperature and humidity, necessitating measurement equipment adapted to the construction site environment. Additionally, bleeding rate measurements are time-consuming and labor-intensive, requiring manual observation and data recording, and necessitating periodic water suction, resulting in low automation. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model proposes an automatic concrete bleeding rate measurement device. The device uses a camera to capture and determine whether there is a bleeding layer inside the measuring cylinder, which is used to determine whether water needs to be pumped out. At the same time, a resistive sensor precisely controls the bottom of the water delivery pipe to only contact the water surface, thereby ensuring that the water being pumped out is the bleeding water and not the cement in the concrete. This ensures accurate measurement results, and the measurement operation is automated, eliminating cumbersome manual operation and reducing the influence of human factors.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides an automatic device for measuring the bleeding rate of concrete, including a vibrating table, a measuring cylinder, a cylinder cover, a glass window, a fixing rod, a camera, a pumping mechanism, and a main controller. The measuring cylinder is installed on the vibrating table, and a cylinder cover is installed on the top of the measuring cylinder. A glass window is installed on one side of the measuring cylinder, and the camera is installed on one side of the glass window. The camera is connected to the cylinder cover through the fixing rod. A pumping mechanism is also installed on the cylinder cover. The vibrating table, camera, and pumping mechanism are all electrically connected to the main controller.

[0006] In a preferred embodiment of this invention, the vibrating table includes a vibrating base, telescopic rods, and a table surface. Two or more telescopic rods are vertically arranged on the top surface of the vibrating base, and the output ends of the telescopic rods are connected to the table surface. The measuring cylinder is disposed on the table surface.

[0007] In a preferred embodiment of this utility model, the pumping mechanism includes a water pump, a water delivery hose, a water delivery rigid pipe, and a water storage tank. The water pump is fixed on the cylinder cover, which has an opening. The bottom end of the water delivery rigid pipe extends into the measuring cylinder through the opening, and the top end of the water delivery rigid pipe is connected to the input end of the water pump through the water delivery hose. The output end of the water pump is connected to the water storage tank.

[0008] In a preferred embodiment of this invention, the cylinder cover is further provided with a motor for driving the water delivery pipe to rise and fall.

[0009] In a preferred embodiment of this invention, a resistive sensor is provided at the bottom end of the water supply pipe.

[0010] In a preferred embodiment of this invention, a scale is provided on the glass window.

[0011] In a preferred embodiment of this invention, handles are provided on both sides of the measuring cylinder.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention proposes an automatic concrete bleeding rate measurement device. A camera captures and determines the presence of a bleeding layer inside the measuring cylinder to decide whether to pump water. Simultaneously, a resistive sensor precisely controls the bottom of the water delivery pipe to only contact the water surface, ensuring that only bleeding water, not cement from the concrete, is pumped, guaranteeing accurate measurement results. This device can simultaneously measure the bleeding rate of four measuring cylinders and take the average, resulting in very small measurement errors and minimal time consumption. Furthermore, it eliminates cumbersome manual operation, reducing the impact of human factors. Its structure facilitates transportation and relocation, allowing for on-site measurement and adjustments during construction. In addition, the use of an automatically tilting vibrating table minimizes interference from manual sample handling, reducing the impact on the sample. The cylinder cover remains stationary throughout the process, and the well-sealed water tank minimizes the impact of water evaporation on the measurement. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a vibratory compactor;

[0015] Figure 2 This is a schematic diagram of the measuring cylinder;

[0016] Figure 3 This is a schematic diagram of the installation structure of the pumping mechanism and the measuring cylinder;

[0017] Figure 4 This is a schematic diagram of the pumping mechanism.

[0018] In the picture:

[0019] 1. Vibrating table; 11. Vibrating table base; 12. Telescopic rod; 13. Table surface; 2. Measuring cylinder; 3. Cylinder cover; 31. Opening; 4. Glass window; 5. Fixing rod; 6. Camera; 7. Pumping mechanism; 71. Water pump; 72. Water delivery hose; 73. Water delivery rigid pipe; 74. Motor; 75. Resistive sensor; 8. Ruler; 9. Handle. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-4 As shown in the embodiment, an automatic concrete bleeding rate measuring device is provided, including a vibrating table 1, a measuring cylinder 2, a cylinder cover 3, a glass window 4, a fixing rod 5, a camera 6, a pumping mechanism 7, and a main controller. The measuring cylinder 2 is mounted on the vibrating table 1, with a cylinder cover 3 on top and a glass window 4 on one side. The camera 6 is located on one side of the glass window 4 and connected to the cylinder cover 3 via the fixing rod 5. The pumping mechanism 7 is also mounted on the cylinder cover 3. The vibrating table 1, camera 6, and pumping mechanism 7 are all electrically connected to the main controller. In this embodiment, four measuring cylinders 2 are provided, evenly arranged on the top surface of the vibrating table 1. The measuring cylinder 2 is a standard 5L cylinder used to hold concrete. The vibrating table 1 vibrates to bring the concrete mixture inside the measuring cylinder 2 to the experimental required state. The highly transparent glass window 4 allows the camera 6 to capture the bleeding thickness on the surface of the concrete mixture, facilitating the determination of whether bleeding still exists and whether pumping is necessary. The camera 6 is horizontally positioned outside the measuring cylinder 2. The pumping mechanism 7 is used to promptly remove the leaked water from the measuring cylinder 2. The main controller can control the coordinated operation of each component to achieve automated measurement, which helps to improve detection efficiency, reduce the inaccuracy of results caused by human factors, and ensure the accuracy of the detection results.

[0022] Specifically, the vibrating table 1 includes a vibrating base 11, telescopic rods 12, and a table surface 13. Two or more telescopic rods 12 are vertically arranged on the top surface of the vibrating base 11. The output ends of the telescopic rods 12 are connected to the table surface 13, and the measuring cylinder 2 is mounted on the table surface 13. In this embodiment, during use, the vibrating base 11 is fixedly installed on the ground. The vibrating base 11 can vibrate, thereby driving the table surface 13 to vibrate synchronously through the telescopic rods 12, thus compacting the concrete. Initially, the table surface 13 is horizontally positioned directly above the vibrating base 11. Four telescopic rods 12 are provided, connected to the four corners of the bottom of the table surface 13. The telescopic rods 12 are telescopic structures; by adjusting their vertical extension and retraction, the table surface 13 can be tilted at a 5° angle, concentrating the oozing water on one side of the measuring cylinder 2 for easy pumping. The measuring cylinder 2 is detachably mounted on the table surface 13.

[0023] Specifically, the pumping mechanism 7 includes a water pump 71, a water delivery hose 72, a water delivery rigid pipe 73, and a water storage tank. The water pump 71 is fixed to the cylinder cover 3, which has an opening 31. The bottom end of the water delivery rigid pipe 73 extends into the measuring cylinder 2 through the opening 31, and the top end of the water delivery rigid pipe 73 is connected to the input end of the water pump 71 through the water delivery hose 72. The output end of the water pump 71 is connected to the water storage tank. In this embodiment, the opening 31 is located at the edge of the cylinder cover 3, the water delivery rigid pipe 73 is arranged vertically, and the water inlet at the bottom end of the water delivery rigid pipe 73 is located close to the inner wall of the measuring cylinder 2. The water pump 71 can pump water out of the measuring cylinder 2 and deliver it to the water storage tank for temporary storage. The water storage tank should have good sealing performance to prevent leakage.

[0024] Specifically, the cylinder cover 3 is also equipped with a motor 74 for driving the lifting and lowering of the water delivery pipe 73. In this embodiment, since the volume of concrete will decrease after water seeps out, its height inside the measuring cylinder 2 will decrease accordingly. In order to ensure that the water in the measuring cylinder 2 can be extracted in time, the motor 74 needs to adjust the height of the water delivery pipe 73 in real time to ensure that the bottom end of the water delivery pipe 73 is always in contact with the liquid surface.

[0025] Specifically, a resistance sensor 75 is installed at the bottom of the water supply pipe 73. In this embodiment, since the resistance of the resistance sensor 75 changes when it touches the water surface, and controls the motor 74 to start and stop accordingly, it is possible to precisely control the water supply pipe 73 to only contact the water surface, ensuring that the water being pumped is oozing water rather than cement from the concrete.

[0026] Specifically, a scale 8 is provided on the glass window 4. In this embodiment, the scale 8 facilitates the camera 6 to capture and determine the thickness of the bleeding layer, thereby calculating the volume of the bleeding water and the initial concrete volume. At this time, the bleeding rate can be calculated using the volume method: Concrete bleeding rate (%) = (Bleeding water volume / Initial concrete volume) × 100.

[0027] Specifically, handles 9 are provided on both sides of the measuring cylinder 2. In this embodiment, the handles 9 facilitate lifting the measuring cylinder 2 and removing it from the vibrating table 1, making the operation simple and quick.

[0028] Working principle: First, mix the concrete according to the experimental specifications. Wet the four measuring cylinders 2 with water and fill them with the concrete mixture. Stop filling when there is about 20mm left to the top of the cylinder and weigh it to obtain m1 as the initial concrete mass. Then, place the measuring cylinders 2 on the platform 13 of the vibrating table 1 and vibrate for 20 seconds. Cover the cylinders with the caps 3, align the camera 6 with the glass window 4, and align the four water supply pipes 73 for pumping. Then, set the platform 13 of the vibrating table 1 to tilt once every 10 minutes, and the camera 6 to take a picture every 10 minutes, with the taking action slightly earlier than the tilting action of the platform 13. After 10 minutes, take a picture and determine whether there is a bleeding layer. If there is, the telescopic rod 12 drives the platform 13 to start tilting. After reaching 5°, control the motor 74 to start driving the water supply pipes 73 to slowly descend. When the lower end of the water supply pipes 73 touches the water surface, the resistance of the resistive sensor 75 changes, the motor 74 stops working, and then the water pump 71 starts. The pumping process begins, and after pumping is completed, the platform 13 returns to a level state. The above operation is repeated every 10 minutes until the camera 6 captures and determines that there is no bleeding layer. After the operation is completed, the cylinder cover 3 is opened to weigh the sample m2 and measure the bleeding mass m3, which is the amount of bleeding. Then, the bleeding rate is calculated by the gravimetric method required by the specification, that is, concrete bleeding rate (%) = (bleeding volume / initial concrete mass) × 100. Then, the bleeding volume and the initial concrete volume are calculated by combining the captured photos, and the bleeding rate is calculated by the volumetric method, that is, concrete bleeding rate (%) = (bleeding volume / initial concrete volume) × 100. The two methods are combined to obtain a more accurate bleeding rate. There are a total of four sets of data in the experiment, and their arithmetic mean is taken as the concrete bleeding rate.

[0029] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. An automatic device for measuring concrete bleeding rate, characterized in that: The device includes a vibrating table (1), a measuring cylinder (2), a cylinder cover (3), a glass window (4), a fixing rod (5), a camera (6), a water pumping mechanism (7), and a main controller. The vibrating table (1) is equipped with a measuring cylinder (2), a cylinder cover (3) is installed on the top of the measuring cylinder (2), a glass window (4) is installed on one side of the measuring cylinder (2), and the camera (6) is installed on one side of the glass window (4). The camera (6) is connected to the cylinder cover (3) through the fixing rod (5). The cylinder cover (3) is also equipped with a water pumping mechanism (7). The vibrating table (1), the camera (6), and the water pumping mechanism (7) are all electrically connected to the main controller.

2. The automatic concrete bleeding rate measuring device according to claim 1, characterized in that: The vibrating table (1) includes a vibrating base (11), telescopic rods (12) and a table surface (13). Two or more telescopic rods (12) are vertically arranged on the top surface of the vibrating base (11). The output end of the telescopic rods (12) is connected to the table surface (13). The measuring cylinder (2) is set on the table surface (13).

3. The automatic concrete bleeding rate measuring device according to claim 1, characterized in that: The pumping mechanism (7) includes a pump (71), a water delivery hose (72), a water delivery hard pipe (73), and a water storage tank. The pump (71) is fixed on the cylinder cover (3), and the cylinder cover (3) has an opening (31). The bottom end of the water delivery hard pipe (73) extends into the measuring cylinder (2) through the opening (31). The top end of the water delivery hard pipe (73) is connected to the input end of the pump (71) through the water delivery hose (72). The output end of the pump (71) is connected to the water storage tank.

4. The automatic concrete bleeding rate measuring device according to claim 3, characterized in that: The cylinder cover (3) is also equipped with a motor (74) for driving the water supply pipe (73) to rise and fall.

5. The automatic concrete bleeding rate measuring device according to claim 4, characterized in that: A resistive sensor (75) is installed at the bottom of the water supply pipe (73).

6. The automatic concrete bleeding rate measuring device according to claim 1, characterized in that: A scale (8) is provided on the glass window (4).

7. The automatic concrete bleeding rate measuring device according to claim 1, characterized in that: The measuring cylinder (2) is provided with handles (9) on both sides.

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