A test device for concrete impermeability

Abstract

This utility model discloses a concrete impermeability testing device, specifically relating to the field of concrete performance testing technology. It includes a main body with multiple bases. Each base has a water inlet at its bottom, and each base has at least one clearance groove and at least one pressure block on its upper surface. The clearance grooves and pressure blocks are staggered circumferentially. A test cylinder is detachably mounted on top of each base. Each test cylinder has multiple locking blocks at its bottom, the number of which matches the total number of clearance grooves. The upper surface of the locking blocks and the lower surface of the pressure blocks are mutually cooperating inclined surfaces. A concrete sample can be detachably placed inside each test cylinder. This utility model employs a fixing method with multiple inclined wedge-shaped fittings, significantly improving the efficiency of installation and disassembly, and can automatically record the initial leakage time of the concrete, avoiding data errors caused by human error.

Description

Technical Field

[0001] This utility model relates to the field of concrete performance testing technology, and more specifically, to a concrete impermeability testing device. Background Technology

[0002] Before concrete is produced, it needs to be made according to the mix proportions. After production, it also needs to be tested to avoid substandard quality. Among these tests, concrete permeability testing is a relatively important and common one. Permeability resistance refers to the ability of building materials (such as concrete) to resist the penetration of water or other liquid media (light oil, heavy oil) under pressure. A concrete permeability testing instrument is suitable for determining and testing the permeability of concrete and mortar. It can also be used to determine the air permeability of building materials and for quality inspection. Therefore, a concrete permeability testing instrument is commonly used to test the permeability of concrete.

[0003] Existing impermeability testing devices mostly use bolts to fix the test cylinder and base. Disassembly and assembly require tightening or loosening multiple bolts one by one. Moreover, there are usually multiple sets of test cylinders and bases, making the entire disassembly and assembly process cumbersome and inefficient. Water seepage detection often relies on manual periodic observation of the sample top surface for water seepage. This not only fails to accurately capture the initial leakage moment but also requires continuous monitoring, resulting in high labor intensity.

[0004] To address these issues, this invention proposes a concrete impermeability testing device. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a concrete impermeability testing device, which solves the problems mentioned in the background art by setting up a clamping block and a pressing block.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a concrete impermeability testing device, comprising a main body, on which multiple bases are provided, each base having a water inlet at its bottom, each base having at least one clearance groove and at least one pressure block on its upper surface, the clearance grooves and pressure blocks being staggered in the circumferential direction, a test cylinder being detachably installed on top of each base, each test cylinder having multiple locking blocks corresponding to its bottom, the number of locking blocks matching the total number of clearance grooves, the upper surface of the locking blocks and the lower surface of the pressure blocks being mutually cooperating inclined surfaces, and a concrete sample being detachably placed inside each test cylinder.

[0007] Furthermore, each of the bases has a first sealing ring embedded on its upper end face. When the test cylinder is stopped under the pressure block by the locking block, the bottom end face of the test cylinder and the upper end face of the first sealing ring form a sealing and pressing fit.

[0008] Furthermore, at least one second sealing ring is provided between the inner wall of the test cylinder and the outer peripheral surface of the concrete sample, and the second sealing rings are distributed at intervals along the axial direction of the test cylinder.

[0009] Furthermore, the main body of the device is also equipped with multiple control valves, the outlet of each control valve being connected to the corresponding water inlet, for independently controlling the water flow entering each base.

[0010] Furthermore, each of the base sidewalls is provided with a fixing plate, a screw is horizontally rotatably connected to the fixing plate, and a slider that is threadedly connected to the screw is laterally slidably connected to the fixing plate. The upper end of the slider is provided with an upward-opening groove. Each of the test cylinder sidewalls is provided with a post, and each post can be inserted into the groove on the corresponding side.

[0011] Furthermore, each of the bases is also hinged with a U-shaped plate, and a tie rod is vertically slidably connected to the middle of the U-shaped plate. A moisture sensor is provided at the bottom of the tie rod to contact the upper surface of the concrete sample to detect whether water seeps out.

[0012] Furthermore, the moisture sensor is a capacitive sensor.

[0013] Furthermore, the bottom of the pull rod is provided with a baffle above the moisture sensor, and an elastic element is fitted on the pull rod between the baffle and the U-shaped plate to elastically press the moisture sensor against the upper surface of the concrete sample.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model adopts a wedge-shaped fit between the locking block and the pressure block, allowing the test cylinder to be locked or disassembled by rotation without tools, significantly improving operational efficiency compared to bolt methods. Simultaneously, the first sealing ring of the base forms a pressure seal with the bottom surface of the test cylinder, and multiple axially spaced second sealing rings are also provided between the inner wall of the test cylinder and the sample, constructing a multi-layered sealing system to effectively prevent pressurized water leakage and ensure stable test pressure.

[0016] 2. Each base in this invention is equipped with an independent control valve, which can individually adjust the inlet water pressure and flow rate, supporting simultaneous comparative tests under multiple different water pressure conditions. If one workstation malfunctions, the water supply can be cut off independently without affecting other workstations. Combined with a mechanical auxiliary structure that uses a screw and slider to drive the insertion column to rotate the test cylinder, rapid rotation and locking are achieved, making operation labor-saving and efficient.

[0017] 3. This utility model is equipped with a moisture sensor. The elastic element continuously presses the sensor firmly against the upper surface of the sample, resulting in high sensitivity and rapid response. When water permeates to the top surface of the sample, the sensor immediately sends an electrical signal to record the initial leakage time, eliminating the need for manual periodic observation and avoiding data errors caused by human oversight. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a partial cross-sectional left view of the present invention.

[0020] Figure 3 This is a top view of the present invention with the test tube removed.

[0021] Figure 4 This is a cross-sectional view of the base in this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the test cylinder in this utility model.

[0023] Figure 6 This is a cross-sectional schematic diagram of the test cylinder in this utility model.

[0024] Figure 7 This utility model Figure 6 An enlarged schematic diagram of part A in the middle.

[0025] Figure 8 This is a front sectional view of the present invention.

[0026] Figure 9 This utility model Figure 8 Enlarged schematic diagram of part B.

[0027] The attached figures are labeled as follows:

[0028] 1. Equipment body; 2. Base; 3. Water inlet; 4. Clearance groove; 5. Pressure block; 6. Test cylinder; 7. Clamping block; 8. Concrete sample; 9. First sealing ring; 10. Second sealing ring; 11. Control valve; 12. Fixing plate; 13. Screw; 14. Sliding block; 15. Slide groove; 16. Insert column; 17. U-shaped plate; 18. Tie rod; 19. Moisture sensor; 20. Baffle; 21. Elastic element. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] like Figures 1 to 9 As shown, this embodiment provides a concrete impermeability testing device, including a main body 1. The main body 1 is a cabinet structure, and multiple bases 2 are arranged side by side in the horizontal direction on the upper worktable. In this embodiment, six bases 2 in two rows are used as an example. Each base 2 has a water inlet 3 at the bottom center. The water inlet 3 is connected to the water supply and pressurization system inside the main body 1 through a pipeline to fill the base 2 with pressurized water.

[0032] The upper surface of each base 2 is an annular plane, and at least one relief groove 4 and at least one pressure block 5 are machined on the end surface, with the relief groove 4 and the pressure block 5 being staggered in the circumferential direction. Figure 3 A preferred distribution is shown: the upper surface of the base 2 is provided with five fan-shaped pressure blocks 5 and five fan-shaped relief grooves 4, which are arranged alternately.

[0033] Each base 2 has a detachable test cylinder 6 mounted on top. The test cylinder 6 is cylindrical and its interior is used to hold a cylindrical concrete sample 8. Multiple locking blocks 7 are integrally formed or fixed on the bottom outer wall of the test cylinder 6. The number of locking blocks 7 matches the total number of clearance slots 4 on the base 2. In this embodiment, there are five locking blocks 7, each corresponding to one of the five clearance slots 4. The upper surface of each locking block 7 is machined into a bevel, and the lower surface of the pressure block 5 is also machined into a matching bevel with the same inclination direction as the bevel, forming a wedge-shaped clamping fit.

[0034] When installing the test cylinder 6, first align the locking blocks 7 at the bottom of the test cylinder 6 with the corresponding relief grooves 4 on the base 2, allowing the test cylinder 6 to fall vertically until the locking blocks 7 are fully inserted into the relief grooves 4. Then, rotate the test cylinder 6 clockwise by a certain angle. The upper surface slope of the locking blocks 7 will gradually slide under the lower surface slope of the pressure block 5. As the rotation angle increases, the wedging action of the slope pulls the test cylinder 6 downwards, achieving a quick lock between the test cylinder 6 and the base 2. For disassembly, rotate in the opposite direction to realign the locking blocks 7 with the relief grooves 4, and then pull the test cylinder 6 upwards. Compared to the existing technology that uses multiple fixing bolts, disassembly is much more convenient.

[0035] To further improve sealing performance, a first sealing ring 9 is embedded on the upper surface of each base 2, with its upper surface slightly protruding from the upper surface of the bottom of the base 2. When the test cylinder 6 is stopped under the pressure block 5 by the locking block 7, the bottom surface of the test cylinder 6 will be tightly pressed against the upper surface of the first sealing ring 9, forming a sealed and tight fit, thereby effectively preventing pressurized water from leaking from the joint surface between the base 2 and the test cylinder 6.

[0036] The concrete sample 8 is detachably placed inside the test cylinder 6, and its sidewalls are typically sealed by applying a sealant to its circumference or by installing a sealing assembly. Preferably, in this embodiment, at least one second sealing ring 10 is provided between the inner wall of the test cylinder 6 and the outer circumference of the concrete sample 8, and these rings are spaced apart along the axial direction of the test cylinder 6, for example, three rings. This creates multiple sealing barriers around the concrete sample 8, forcing pressurized water to penetrate only along the sample's axial direction, ensuring the accuracy of the test results.

[0037] To enable independent water control at each test station, multiple control valves 11 are installed on the main body 1 of the equipment. These control valves 11 are either shut-off valves or electromagnetic proportional valves, and the outlet of each control valve 11 is connected to the inlet 3 of a corresponding base 2. During the test, the inlet pressure and flow rate can be individually adjusted for each test cylinder 6. This allows for simultaneous comparative tests under multiple different water pressure conditions, and also enables the water supply to be cut off independently at a particular station without affecting other stations in case of an anomaly.

[0038] To facilitate the installation and disassembly of the test cylinder 6, a fixing plate 12 extends outward from the side wall of each base 2, and a screw 13 is horizontally rotatably connected to the fixing plate 12. A slider 14 is slidably connected to the fixing plate 12 along the lateral direction, and the slider 14 is threadedly engaged with the screw 13. When the screw 13 is rotated, the slider 14 can be driven to move laterally. The upper end of the slider 14 has an upward-opening groove 15. A post 16 is fixed on the side wall of each test cylinder 6 at the position corresponding to the slider 14. The axis of the post 16 extends outward along the radial direction of the test cylinder 6. When the slider 14 moves laterally, the slider 14 drives the post 16 to swing through the groove 15, the post 16 drives the test cylinder 6 to rotate, and the test cylinder 6 drives multiple locking blocks 7 to rotate.

[0039] When slider 14 moves to the left, test cylinder 6 rotates clockwise to fix test cylinder 6 on base 2 and prevents the locking block 7 from loosening with pressure block 5; when slider 14 moves to the right, test cylinder 6 rotates counterclockwise to remove test cylinder 6 from base 2.

[0040] Example 2

[0041] like Figure 1 and Figure 2As shown, this embodiment adds an automatic seepage detection function based on embodiment one to more accurately capture the initial leakage moment of concrete sample 8.

[0042] Specifically, a U-shaped plate 17 is hinged to each base 2, with its opening facing downwards. Its two arms are hinged to opposite sides of the base 2 via pins, allowing the U-shaped plate 17 to rotate around the hinge point in the vertical plane for easy insertion or removal of the concrete sample 8. A vertical through-hole is provided in the middle of the crossbeam of the U-shaped plate 17, through which a tie rod 18 slides freely up and down. A moisture sensor 19 is installed at the bottom of the tie rod 18, and its lower surface contacts the upper surface of the concrete sample 8 to detect water seepage.

[0043] As a preferred option, the moisture sensor 19 is a capacitive sensor, which determines the presence of moisture by sensing changes in the dielectric constant of the surface medium. It features high sensitivity, rapid response, and low cost.

[0044] To ensure that the moisture sensor 19 remains in close contact with the upper surface of the concrete sample 8, a disc-shaped baffle 20 is fixed above the moisture sensor 19 on the pull rod 18. An elastic element 21, specifically a helical compression spring, is fitted onto the pull rod 18. The lower end of the spring abuts against the upper surface of the baffle 20, and the upper end abuts against the lower surface of the crossbeam of the U-shaped plate 17. In this way, the elastic element 21 continuously applies a downward pushing force to the baffle 20, thereby elastically pressing the moisture sensor 19 against the upper surface of the concrete sample 8, ensuring good contact while accommodating slight unevenness that may exist on the sample's upper surface. When the seepage water inside the concrete sample 8 rises to the top surface, the moisture sensor 19 can immediately detect the moisture and send an electrical signal to the control system, thus accurately recording the leakage initiation time without manual intervention.

[0045] Before placing the concrete sample 8, the pull rod 18 can be pulled upwards to open the U-shaped plate 17 as a whole. After the sample is installed and the test cylinder 6 is locked, the U-shaped plate 17 is flipped back to its original position, and the pull rod 18 is released so that the moisture sensor 19 is pressed against the upper surface of the sample under the action of the elastic element 21, and the test can then begin. This structure is compact, easy to operate, and greatly improves the level of automation of the device.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A concrete impermeability testing device, comprising a main body (1), characterized in that, The main body (1) of the equipment is provided with multiple bases (2), each base (2) is provided with a water inlet (3) at the bottom, each base (2) is provided with at least one clearance groove (4) and at least one pressure block (5) on the upper surface, the clearance groove (4) and the pressure block (5) are staggered in the circumferential direction, each base (2) is detachably installed with a test cylinder (6) on the top, each test cylinder (6) is provided with multiple locking blocks (7) at the bottom, the number of locking blocks (7) matches the total number of clearance grooves (4), the upper surface of the locking block (7) and the lower surface of the pressure block (5) are mutually cooperating inclined surfaces, each test cylinder (6) is detachably provided with a concrete sample (8) inside.

2. The concrete impermeability testing device according to claim 1, characterized in that, Each of the bases (2) has a first sealing ring (9) embedded on its upper end face. When the test cylinder (6) is stopped by the card block (7) under the pressure block (5), the bottom end face of the test cylinder (6) and the upper end face of the first sealing ring (9) form a sealing and pressing fit.

3. The concrete impermeability testing device according to claim 1, characterized in that, At least one second sealing ring (10) is provided between the inner wall of the test cylinder (6) and the outer peripheral surface of the concrete sample (8), and the second sealing ring (10) is distributed at intervals along the axial direction of the test cylinder (6).

4. The concrete impermeability testing device according to claim 1, characterized in that, The main body (1) of the equipment is also provided with a number of control valves (11), the outlet of each control valve (11) is connected to the corresponding water inlet (3), and is used to independently control the water flow entering each base (2).

5. The concrete impermeability testing device according to claim 1, characterized in that, Each of the bases (2) has a fixing plate (12) on its side wall. A screw (13) is horizontally rotatably connected to the fixing plate (12). A slider (14) that is threadedly connected to the screw (13) is slidably connected to the fixing plate (12). The upper end of the slider (14) has an upward-opening groove (15). Each of the test cylinders (6) has a post (16) on its side wall. Each post (16) can be inserted into the groove (15) on the corresponding side.

6. The concrete impermeability testing device according to claim 1, characterized in that, Each of the bases (2) is also hinged with a U-shaped plate (17), and a tie rod (18) is vertically slidably connected in the middle of the U-shaped plate (17). A moisture sensor (19) is provided at the bottom of the tie rod (18) to contact the upper surface of the concrete sample (8) to detect whether water seeps out.

7. The concrete impermeability testing device according to claim 6, characterized in that, The moisture sensor (19) is a capacitive sensor.

8. The concrete impermeability testing device according to claim 6, characterized in that, The bottom of the pull rod (18) is provided with a baffle (20) located above the moisture sensor (19). An elastic element (21) is fitted on the pull rod (18) between the baffle (20) and the U-shaped plate (17) to elastically press the moisture sensor (19) against the upper surface of the concrete sample (8).

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