Concrete permeable rate detection device
By using a design in the concrete permeability testing device that fills the inner cavity of the guide tube with fine sand and seals it with a rubber membrane, the problem of insufficient testing accuracy caused by the uneven surface of the concrete test block is solved, and accurate measurement of permeability is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-06
AI Technical Summary
Uneven concrete test block surfaces lead to insufficient testing accuracy, and water leaks from the edges of the test blocks, affecting the accuracy of permeability measurement.
A concrete permeability testing device is designed, which uses a guide tube with fine sand filling the inner cavity at the bottom and sealed with a rubber membrane. The guide tube is placed on the surface of the test block, and the sealing is achieved by utilizing the pressure of the fine sand and the deformation characteristics of the rubber membrane. The permeability is measured in combination with a pressure sensor.
It improves the accuracy of permeability measurement, ensures the accuracy of water volume measurement, reduces side leakage errors, and improves the reliability of detection.
Smart Images
Figure CN223977079U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete water permeability detection, and particularly relates to a concrete water permeability detection device. Background Technique
[0002] Concrete, abbreviated as "砼 (tóng)", refers to the general term of engineering composite materials in which aggregate is cemented into a whole by cementitious materials. Usually, the term concrete refers to cement concrete made of cement as the cementitious material, sand and stone as the aggregate; it is mixed with water (which may contain additives and admixtures) in a certain proportion and obtained by stirring, also known as ordinary concrete. It is widely used in civil engineering. The main purpose of concrete water permeability detection is to verify whether the water permeability performance of the concrete structure meets the design requirements, ensure its durability and stability in a specific application environment, and at the same time timely discover and prevent potential safety hazards caused by poor water permeability performance, so as to comprehensively ensure the project quality and safety.
[0003] During the detection, water is poured onto the upper surface of the concrete test block, and the amount of water passing through the concrete test block is obtained by weighing and other methods, and its water permeability is measured. However, since the surface of the concrete test block is not flat and the size of the test block is limited, it is easy for water to leak down from the edge of the test block when pouring water, resulting in insufficient detection accuracy. Therefore, we propose a concrete water permeability detection device. Content of the Utility Model
[0004] The purpose of the utility model is to provide a concrete water permeability detection device. By setting a guide cylinder with an inner cavity at the bottom and sealed with a rubber membrane, and sufficient fine sand is filled in the inner cavity. When placed on the surface of the concrete test block, due to the pressure of the fine sand and its deformation characteristics with the rubber membrane, it can be well sealed and contacted with the surface of the concrete test block, so that the poured clear water will not leak from the side, and the water permeability can be accurately measured by measuring the water permeability, thus solving the problems raised in the background technique.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: a concrete water permeability detection device, including a support frame and a guide cylinder. Four corners of the bottom of the support frame are supported and fixed with support feet. An opening is provided in the middle position of the surface of the support frame, and pressure sensors are installed on the surface of the support frame at the four corners of the opening. A water receiving tank is placed below the support frame directly below the opening; the upper and lower parts of the guide cylinder are communicated with the outside. An annular inner cavity is arranged inside the lower part of the guide cylinder, and the bottom of the inner cavity is communicated with the outside, and the bottom of the inner cavity is blocked by a rubber membrane, and fine sand is also filled in the inner cavity.
[0006] By adopting the above technical solution, after filling a cup with clean water, the total weight is measured. Then, the clean water is poured into the guide tube, the duration is recorded, and the total weight after water permeation is measured to obtain the water permeation per unit time. The bottom area inside the guide tube is the water permeable area, and finally, the water permeability rate can be measured.
[0007] Optionally, a pull ball is provided on the side of the water receiving tank, and the pull ball is fixed to the side of the water receiving tank by a connecting rod.
[0008] By adopting the above technical solution, when it is necessary to remove the water tank, it can be easily pulled out by pulling the ball.
[0009] Optionally, support grooves are provided at all four corners of the support frame, and the pressure sensor is fixedly placed in the support grooves.
[0010] Optionally, the distance between the legs at the bottom of the support frame on the long side is greater than the length of the water receiving trough, and the distance between the legs at the bottom of the support frame on the short side is greater than the width of the water receiving trough.
[0011] By adopting the above technical solution, the water receiving trough can be smoothly pulled out from between the support legs.
[0012] Optionally, the pressure sensors installed at the four corners of the support frame are of the same specification, and the upper surface height of the four pressure sensors is the same.
[0013] By adopting the above technical solution, it is ensured that the concrete test block can be horizontally supported above the pressure sensor, thus ensuring the accuracy of its measurement.
[0014] Optionally, the area of the opening is smaller than the area of the top opening of the water tank.
[0015] By adopting the above technical solution, all the water falling from the opening downwards can be caught by the water receiving tank.
[0016] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:
[0017] 1. The technical solution of this application sets up a guide tube with an inner cavity at the bottom, which is sealed with a rubber membrane. The inner cavity is filled with a sufficient amount of fine sand. When placed on the surface of a concrete test block, due to the pressure of the fine sand and its deformation characteristics with the rubber membrane, it can be well sealed and adhered to the surface of the concrete test block, so that the poured water will not leak from the side. The water permeability can be measured more accurately and the water permeability rate can be finally measured.
[0018] 2. The technical solution of this application also has a pull ball fixed on the side of the water tank by a connecting rod. After use, the water tank can be easily pulled out for cleaning by pulling the pull ball. Attached Figure Description
[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0020] Figure 1 This is a schematic diagram of the overall structure of the concrete permeability testing device of this utility model;
[0021] Figure 2 This is a schematic diagram of the support frame structure of the concrete permeability testing device of this utility model;
[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the guide tube of the concrete permeability testing device of this utility model.
[0023] In the diagram: 1. Support frame; 11. Support leg; 12. Support groove; 121. Pressure sensor; 13. Opening; 2. Guide tube; 21. Inner cavity; 211. Rubber membrane; 212. Fine sand; 3. Water receiving tank; 31. Pull ball; 311. Connecting rod; 4. Concrete test block. Detailed Implementation
[0024] Please see Figure 1-3 This utility model provides a technical solution: a concrete permeability testing device, including a support frame 1, with four corner supports 11 fixed at the bottom of the support frame 1. The four corner supports 11 are at the same height to achieve horizontal support for the support frame 1. An opening 13 is opened in the middle of the surface of the support frame 1, and pressure sensors 121 are installed on the surface of the support frame 1 at the four corners of the opening 13. A support groove 12 is opened at the four corners of the surface of the support frame 1, and the pressure sensors 121 are fixed in the support groove 12. At the same time, the pressure sensors 121 installed at the four corners of the support frame 1 are of the same specification, and the upper surface height of the four pressure sensors 121 is the same.
[0025] When in use, the concrete test block 4 is placed above the support frame 1, and its four corner supports are placed above the pressure sensors 121 at the four corners, so that the weight of the concrete test block 4 can be measured.
[0026] Additionally, a guide cylinder 2 is provided, with its upper and lower parts connected to the outside. The internal cross-sectional area of the guide cylinder 2 is known. An annular inner cavity 21 is provided inside the lower part of the guide cylinder 2, with its bottom connected to the outside. The bottom of the inner cavity 21 is sealed by a rubber membrane 211. Fine sand 212 is also filled inside the inner cavity 21. During use, the guide cylinder 2 is placed in the middle of the surface of the concrete test block 4. The fine sand 212 in the inner cavity 21 exerts downward pressure on the rubber membrane 211, which can deform freely. This allows the rubber membrane 211 to adhere tightly to the uneven surface of the concrete test block 4, thus forming a good seal between the bottom of the guide cylinder 2 and the surface of the concrete test block 4.
[0027] Then, fill a cup with a diameter similar to the outer diameter of the guide tube 2 with enough water, support it on top of the guide tube 2, and use pressure sensor 121 to weigh and record the total weight W1. Then, pour the water from the cup into the inside of the guide tube 2, and place the cup on top of the guide tube 2 again. Then, observe and record the time. The water in the guide tube 2 falls through the concrete test block 4 into the water receiving tank 3. After a specific time T, use pressure sensor 121 again to measure the total weight W2 and obtain the duration. The difference between the two weights is the weight of the water that has permeated (W1-W2). From this weight, the volume of water that has permeated can be obtained. The permeable area is the inner bottom area of the guide tube 2. Finally, the permeability (i.e., water permeation per unit time / permeable area) can be calculated.
[0028] To facilitate the collection and treatment of leaking water, a water collection trough 3 is placed under the support frame 1 located directly below the opening 13. The area of the opening 13 is smaller than the area of the upper opening of the water collection trough 3. The leaking water can fall from the opening 13 and be collected in the water collection trough 3. A pull ball 31 is also provided on the side of the water collection trough 3. The pull ball 31 is fixed to the side of the water collection trough 3 by a connecting rod 311. The distance between the legs 11 on the long side of the bottom of the support frame 1 is greater than the length of the water collection trough 3, and the distance between the legs 11 on the short side of the bottom of the support frame 1 is greater than the width of the water collection trough 3. Then, the water collection trough 3 can be pulled outward from between the two legs 11 on the side by pulling the pull ball 31.
[0029] In use, the concrete test block 4 to be tested is cut to a size suitable for the support frame 1. The concrete test block 4 is placed on top of the support frame 1, with its four corners supported by pressure sensors 121. The water collection tank 3 is pushed to the bottom of the support frame 1 and placed there. Then, the guide tube 2 is placed on the surface of the concrete test block 4. The fine sand 212 in the inner cavity 21 exerts downward pressure on the rubber membrane 211, which can deform freely. This allows the rubber membrane 211 to adhere tightly to the uneven surface of the concrete test block 4, creating a good seal between the bottom of the guide tube 2 and the surface of the concrete test block 4. Then, a cup with a diameter similar to the outer diameter of the guide tube 2 is filled with enough water and placed on top of the guide tube 2. The total weight at this time is measured and recorded using the pressure sensor 121. Then, the water in the cup is poured into the inside of the guide tube 2, and the cup is placed on top of the guide tube 2 again. Then, the time is observed and recorded. The water in the guide tube 2 falls through the concrete test block 4 into the water receiving tank 3. After a certain time, the total weight at this time is measured again using the pressure sensor 121 and the duration is obtained. The difference between the two weights is the weight of the water that has passed through. Finally, the water permeability can be calculated.
Claims
1. A device for detecting the permeability of concrete, comprising a support frame (1) and a guide cylinder (2), characterized in that: The bottom four corners of the support frame (1) are supported and fixed with supporting legs (11), the middle position of the surface of the support frame (1) is provided with an opening (13), the surface of the support frame (1) at the four corners of the opening (13) is provided with a pressure sensor (121), and the water receiving groove (3) is placed below the support frame (1) below the opening (13). The upper and lower parts of the guide cylinder (2) are communicated with the outside, the inside of the lower part of the guide cylinder (2) is provided with an annular inner cavity (21), the bottom of the inner cavity (21) is communicated with the outside, the bottom of the inner cavity (21) is blocked by a rubber film (211), and fine sand (212) is filled in the inner cavity (21).
2. The concrete permeability detection device according to claim 1, characterized in that: The side of the water receiving groove (3) is provided with a pull ball (31), and the pull ball (31) is fixed on the side of the water receiving groove (3) through a connecting rod (311).
3. The concrete permeability detection device according to claim 1, characterized in that: The surface of the support frame (1) is provided with a support groove (12) at the four corners.
4. The concrete permeability detection device according to claim 1, characterized in that: The distance between the supporting legs (11) at the long side of the bottom of the support frame (1) is greater than the length of the water receiving groove (3), and the distance between the supporting legs (11) at the short side of the bottom of the support frame (1) is greater than the width of the water receiving groove (3).
5. The concrete permeability detection device of claim 1, wherein: The specifications of the pressure sensors (121) installed at the four corners of the support frame (1) are the same, and the upper surfaces of the four pressure sensors (121) are the same in height.
6. The concrete permeability detection device of claim 1, wherein: The area of the opening (13) is smaller than the area of the upper opening of the water receiving groove (3).