Cover die of concrete impermeability tester

Abstract

The utility model relates to a cover die of a concrete impermeability tester. The first test mold and the second test mold are symmetrically connected to the test mold hinge; the first steel plate is arranged at one end, far away from the test mold hinge, of the first test mold; the second steel plate is arranged at one end, far away from the test mold hinge, of the second test mold and is opposite to the first steel plate; the fastening piece is used for pressing the first steel plate and the second steel plate; the fastening frame is used for mounting the fastening piece; a mounting groove for mounting a concrete test piece is formed by the first test mold and the second test mold. The cover die has the effect of enhancing the sealing performance between the concrete test piece and the side wall of the cover die.

Description

Technical Field

[0001] This application relates to the field of concrete performance testing, and in particular to a formwork for a concrete permeability testing instrument. Background Technology

[0002] Concrete impermeability refers to concrete's ability to resist the penetration of pressurized liquids, and it is one of the key indicators for evaluating concrete durability and safety. It reflects the density of the concrete's internal pore structure, directly affecting the structure's waterproofing performance and long-term stability. Good impermeability can extend the service life of concrete structures and reduce maintenance costs.

[0003] In concrete permeability testing, ensuring a tight seal between the concrete specimen and the sidewalls of the mold is crucial for a successful test. Currently, before testing the permeability of concrete, a rubber ring is typically fitted over the middle of the outer wall of the concrete specimen, then pressed into the mold, and finally the mold is installed in the permeability meter for testing. However, the rubber ring is prone to micro-cracks or damage, and as the test water pressure increases, water can seep out from the periphery of the concrete specimen, affecting the test results. Utility Model Content

[0004] To enhance the sealing performance between the concrete specimen and the sidewall of the mold, this application provides a mold for a concrete permeability testing instrument.

[0005] The concrete permeability testing instrument template provided in this application adopts the following technical solution:

[0006] A concrete permeability testing instrument mold includes a mold hinge, a first mold and a second mold symmetrically connected to the mold hinge, a first steel plate disposed at the end of the first mold away from the mold hinge, a second steel plate disposed at the end of the second mold away from the mold hinge and arranged opposite to the first steel plate, fasteners for pressing the first steel plate and the second steel plate, and a fastening frame for installing the fasteners; the first mold and the second mold form an installation groove for installing concrete specimens.

[0007] By adopting the above technical solution, the first and second test molds are symmetrically connected by the test mold hinges. The first and second test molds form an installation groove for installing concrete specimens, allowing for easy opening and closing, facilitating the installation and removal of concrete specimens. The first and second steel plates are respectively located at the ends of the first and second test molds furthest from the test mold hinges, and are tightened by fasteners installed on the fastening frame. This not only ensures the stability of the specimens during the test but also enhances the sealing performance between the concrete specimens and the side walls of the testing apparatus mold, effectively preventing water seepage from the side walls of the concrete specimens during the test, thus contributing to improved accuracy and reliability of the test results.

[0008] Optionally, the inner wall of the mounting groove is provided with a first rubber layer for the outer wall of the concrete specimen to abut against, and the top of the first rubber layer is folded away from the mounting groove to form a flange.

[0009] By adopting the above technical solution, the first rubber layer can effectively fill the gap between the inner wall of the installation groove and the outer wall of the concrete specimen, improving the sealing performance and reducing the probability of water seeping out from the periphery of the specimen. The flanged design not only enhances the sealing effect of the first rubber layer, but also makes it easier for operators to remove the first rubber layer, thus facilitating its replacement.

[0010] Optionally, the first rubber layer includes a first portion disposed in the first mold and a second portion disposed in the second mold, wherein the first portion is provided with a snap-fit ​​recess at one end near the second portion, and the second portion is provided with a snap-fit ​​protrusion that snaps into the snap-fit ​​recess.

[0011] By adopting the above technical solution, the first rubber layer is divided into a first part arranged in the first mold and a second part arranged in the second mold, and the two parts are engaged by a snap-fit ​​recess and a snap-fit ​​protrusion. This design can effectively enhance the stability of the first rubber layer in the mounting groove, prevent it from shifting or moving due to opening the hinge when installing and removing the concrete specimen during the test, and thus ensure a more reliable seal between the concrete specimen and the side wall of the testing instrument mold.

[0012] Optionally, a second rubber layer is provided on one side of each of the first steel plate and the second steel plate.

[0013] By adopting the above technical solution, a second rubber layer is provided on one side of each of the first and second steel plates, which can effectively improve the sealing performance between the steel plates and prevent water from seeping out from the joint of the steel plates during the test, thereby ensuring the accuracy of the test results.

[0014] Optionally, the trial molding hinge includes a hinge shaft and two hinge plates hinged to the hinge shaft, with sealing patterns provided on the corresponding side of the two hinge plates.

[0015] By adopting the above technical solution, sealing patterns are set on the corresponding side of the two hinge plates of the test mold hinge, which can effectively improve the sealing performance of the test mold hinge connection and reduce the probability of water seeping out from the test mold hinge connection during the test, thereby ensuring the accuracy and reliability of the concrete impermeability test.

[0016] Optionally, the fastener is two sets of oppositely arranged movable cylinders, which respectively push the first steel plate and the second steel plate to press against each other.

[0017] By adopting the above technical solution, the movable cylinder, acting as a fastener, can provide a stable pushing force, ensuring a tight fit between the first and second steel plates, thereby guaranteeing the seal between the concrete specimen and the testing instrument mold. Furthermore, the movable cylinder is easier to operate, allowing for rapid tightening and loosening actions, thus improving testing efficiency.

[0018] Optionally, the first steel plate and the second steel plate are provided with limiting recesses for the piston rod of the movable cylinder to abut against.

[0019] By adopting the above technical solution, limiting recesses are opened on the first and second steel plates for the piston rod of the movable cylinder to abut against, which can ensure the positioning accuracy of the piston rod when pushing the steel plate, avoid the problem of uneven clamping force caused by position deviation, improve the stability of the piston rod when acting on the steel plate, and help increase the sealing performance of concrete specimens in impermeability test.

[0020] Optionally, the fastener is two sets of oppositely arranged fastening screws, and the fastening frame has fastening screw holes that cooperate with the fastening screws. The two sets of fastening screws respectively drive the first steel plate and the second steel plate to move towards each other.

[0021] By adopting the above technical solution, the fasteners consist of two sets of oppositely arranged fastening screws, which engage with the fastening screw holes on the fastening frame to compress the first and second steel plates. This solution is simple to operate and flexible to adjust, allowing the clamping force to be adjusted according to actual needs. This effectively avoids specimen displacement or sealing failure caused by improper clamping, thereby improving the accuracy and reliability of the impermeability test.

[0022] Optionally, the ends of the two sets of fastening screws are respectively provided with clamping plates for abutting against the first steel plate and the second steel plate. The clamping plates are provided with guide posts parallel to the fastening screws on the upper and lower sides of the fastening screws, and the fastening frame is provided with guide through holes for the guide posts to pass through.

[0023] By adopting the above technical solution, the clamping plate effectively disperses the clamping force of the fastening screws on the first and second steel plates, avoiding excessive local stress that could lead to deformation or damage. The cooperation between the guide post and the guide through hole ensures that the clamping plate moves smoothly along the direction of the fastening screws during the tightening process, preventing deviation during clamping, improving the stability and reliability of the clamping process, and thus enhancing the overall sealing performance of the concrete permeability testing instrument mold.

[0024] Optionally, the clamping plate has an abutment groove on the side near the fastening screw, and a rolling bearing is provided in the abutment groove, with the end of the fastening screw arranged in the inner ring of the rolling bearing.

[0025] By adopting the above technical solution, the clamping plate is provided with an abutment groove and a rolling bearing is provided in the abutment groove. The setting of the rolling bearing can significantly reduce the frictional resistance between the fastening screw and the clamping plate, making the fastening screw rotate more smoothly, reducing the probability of displacement of the clamping plate, and improving the reliability of the overall structure.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. A concrete permeability testing instrument mold, wherein a first mold and a second mold symmetrically connected to the mold hinge form an installation groove, which facilitates the installation of concrete specimens. The first and second steel plates are used in conjunction with fasteners to press the mold together, which effectively improves the sealing performance between the concrete specimen and the mold, thereby effectively preventing water from seeping out from the side wall of the concrete specimen during the test, and helping to improve the accuracy and reliability of the test results.

[0028] 2. By setting a first rubber layer on the inner wall of the mounting groove, and folding the top of the first rubber layer away from the mounting groove to form a flange, the sealing effect between the outer wall of the specimen and the mold is further enhanced, and the replacement of the first rubber layer is also convenient.

[0029] 3. By setting a second rubber layer on both the corresponding sides of the first and second steel plates, the sealing performance between the steel plates is effectively improved, preventing water from seeping out from the joints of the steel plates during the test, thereby ensuring the accuracy of the test results. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the concrete permeability testing instrument mold in Embodiment 1 of this application.

[0031] Figure 2 This is a cross-sectional schematic diagram of the trial mold hinge in Embodiment 1 of this application.

[0032] Figure 3 This is a cross-sectional schematic diagram of the first rubber layer in Embodiment 1 of this application.

[0033] Figure 4 This is a cross-sectional schematic diagram of the interaction between the movable cylinder and the first and second steel plates in Embodiment 1 of this application.

[0034] Figure 5 This is a schematic diagram of the concrete permeability testing instrument mold in Example 2 of the application.

[0035] Figure 6 This is a cross-sectional schematic diagram of the fastening screw and the clamping plate in Embodiment 2 of the application.

[0036] Explanation of reference numerals in the attached drawings: 1. Trial mold hinge; 11. Hinge shaft; 12. Hinge plate; 13. Sealing pattern; 2. First trial mold; 21. First steel plate; 3. Second trial mold; 31. Second steel plate; 4. Fastening frame; 41. Fastening screw hole; 42. Guide through hole; 5. Mounting groove; 6. Movable cylinder; 61. Limiting recess; 7. Fastening screw; 71. Pressure plate; 72. Abutment groove; 73. Rolling bearing; 74. Guide post; 75. Fastening handle; 8. First rubber layer; 81. Flanged edge; 82. First part; 821. Snap-fit ​​protrusion; 83. Second part; 831. Snap-fit ​​recess; 9. Second rubber layer. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0038] Example 1:

[0039] This application discloses a mold for a concrete permeability testing instrument. (Refer to...) Figure 1 The concrete permeability testing instrument includes a mold hinge 1, a first mold 2 and a second mold 3 symmetrically connected to the mold hinge 1, a first steel plate 21 located at the end of the first mold 2 away from the mold hinge 1, a second steel plate 31 located at the end of the second mold 3 away from the mold hinge 1, fasteners for pressing the first steel plate 21 and the second steel plate 31, and a fastening frame 4 for installing the fasteners. The first steel plate 21 and the second steel plate 31 are arranged opposite to each other. The first mold 2 and the second mold 3 form an installation groove 5 for installing concrete specimens, which facilitates the operator to install concrete specimens after opening the mold hinge 1.

[0040] refer to Figure 2 The test mold hinge 1 includes a hinge shaft 11 and two hinge plates 12 hinged to the hinge shaft 11. The two hinge plates 12 are respectively connected to the first test mold 2 and the second test mold 3. The two hinge plates 12 are provided with sealing grooves 13 on their respective sides, which effectively improves the sealing performance of the connection of the test mold hinge 1 and reduces the probability of water seeping out from the connection of the test mold hinge 1 during the test.

[0041] Reference Figure 2 and Figure 3A first rubber layer 8 is arranged in the inner wall of the mounting groove 5. The top of the first rubber layer 8 is folded away from the mounting groove 5 to form a flange 81. The first rubber layer 8 can effectively fill the gap between the inner wall of the mounting groove 5 and the outer wall of the concrete specimen, improve the sealing performance, and reduce the probability of water seeping out from the periphery of the specimen. The flange 81 makes it easy for the operator to remove and install the first rubber layer 8. The first rubber layer 8 includes a first part 82 arranged in the first mold 2 and a second part 83 arranged in the second mold 3, which reduces the probability of the first rubber layer 8 shifting or misaligning due to opening the hinge during the test. The end of the first part 82 is provided with a snap-fit ​​protrusion 821, and the end of the second part 83 is provided with a snap-fit ​​recess 831. After the operator installs the concrete specimen and closes the mold hinge 1, the first part 82 and the second part 83 of the first rubber layer 8 are engaged with the snap-fit ​​protrusion 821 through the snap-fit ​​recess 831.

[0042] Reference Figure 1 and Figure 4 In this embodiment, the fasteners are two sets of opposing movable cylinders 6, with three cylinders in each set, and they are evenly spaced vertically on the fastening frame 4. The two sets of opposing movable cylinders 6 drive the first steel plate 21 and the second steel plate 31 to move closer to each other. The first steel plate 21 and the second steel plate 31 are provided with limiting recesses 61 for the piston rods of the movable cylinders 6 to abut against. As fasteners, the movable cylinders 6 can provide stable pushing force, making the first steel plate 21 and the second steel plate 31 fit tightly together, thereby ensuring the sealing between the concrete specimen and the mold of the testing instrument. The limiting recesses 61 can ensure the accurate positioning of the piston rods of the movable cylinders 6 when pushing the steel plates, avoiding uneven clamping force caused by positional deviation.

[0043] refer to Figure 4 A second rubber layer 9 is arranged on one side of the first steel plate 21 and the second steel plate 31 respectively. The setting of the second rubber layer 9 can effectively improve the sealing performance between the steel plates and prevent water from seeping out from the joint of the steel plates during the test, thereby ensuring the accuracy of the test results.

[0044] The implementation principle of the concrete permeability testing instrument mold according to the embodiments of this application is as follows: Before installing the concrete specimen, the operator opens the mold hinge 1, and then the concrete specimen is installed into the installation groove 5 formed by the first mold 2 and the second mold 3. After that, the mold hinge 1 is closed and installed on the permeability tester. Finally, the movable cylinder 6 on the fastening frame 4 is driven to press the first steel plate 21 connected to the end of the first mold 2 and the second steel plate 31 connected to the end of the second mold 3, so that the first steel plate 21 and the second steel plate 31 are tightly fitted, thereby effectively preventing water from seeping out from the side wall of the concrete specimen during the test and improving the accuracy and reliability of the test results.

[0045] Example 2:

[0046] The difference between this embodiment and embodiment 1 is that the fasteners used to press the first steel plate 21 and the second steel plate 31 are different, and the first steel plate 21 and the second steel plate 31 are not provided with limiting recesses 61. The rest of the structure is consistent with embodiment 1.

[0047] refer to Figure 5 and Figure 6 In this embodiment, the fastener consists of two sets of oppositely arranged fastening screws 7. Each fastening screw 7 has a fastening handle 75 for rotation. The ends of the two sets of fastening screws 7 are respectively provided with clamping plates 71 for abutting against the first steel plate 21 and the second steel plate 31. The clamping plate 71 has an abutment groove 72 on the side near the fastening screw 7, and a rolling bearing 73 is arranged in the abutment groove 72. The inner ring of the rolling bearing 73 is inserted into the end of the fastening screw 7, making the rotation of the fastening screw 7 smoother. Guide posts 74 are provided on the clamping plate 71, symmetrically arranged on the upper and lower sides of the fastening screw 7 and parallel to the fastening screw 7. The fastening frame 4 has fastening screw holes 41 that mate with the fastening screw 7 and guide through holes 42 through which the guide posts 74 pass. Operators can tighten the two sets of fastening screws 7, causing the two sets of fastening screws 7 to push the first steel plate 21 and the second steel plate 31 to press against each other. This solution is simple to operate and flexible to adjust. The clamping force can be adjusted according to actual needs, effectively avoiding specimen displacement or sealing failure caused by improper clamping, thereby improving the accuracy and reliability of the impermeability test.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mold for a concrete permeability testing instrument, characterized in that, The test mold includes a test mold hinge (1), a first test mold (2) and a second test mold (3) symmetrically connected to the test mold hinge (1), a first steel plate (21) disposed at the end of the first test mold (2) away from the test mold hinge (1), a second steel plate (31) disposed at the end of the second test mold (3) away from the test mold hinge (1) and arranged opposite to the first steel plate (21), fasteners for pressing the first steel plate (21) and the second steel plate (31), and a fastening frame (4) for installing the fasteners; the first test mold (2) and the second test mold (3) form an installation groove (5) for installing concrete specimens.

2. The concrete permeability testing instrument mold according to claim 1, characterized in that, The inner wall of the mounting groove (5) is provided with a first rubber layer (8) for the outer wall of the concrete specimen to abut against. The top of the first rubber layer (8) is folded away from the mounting groove (5) to form a flange (81).

3. The concrete permeability testing instrument mold according to claim 2, characterized in that, The first rubber layer (8) includes a first part (82) disposed in the first mold (2) and a second part (83) disposed in the second mold (3). The first part (82) has a snap-fit ​​recess (831) at one end near the second part (83), and the second part (83) has a snap-fit ​​protrusion (821) that snaps into the snap-fit ​​recess (831).

4. The concrete permeability testing instrument mold according to claim 1, characterized in that, A second rubber layer (9) is provided on one side of each of the first steel plate (21) and the second steel plate (31).

5. The concrete permeability testing instrument mold according to claim 1, characterized in that, The trial molding hinge (1) includes a hinge shaft (11) and two hinge plates (12) hinged to the hinge shaft (11), and the two hinge plates (12) are provided with sealing patterns (13) on their respective sides.

6. The concrete permeability testing instrument mold according to claim 1, characterized in that, The fastener consists of two sets of oppositely arranged movable cylinders (6), which respectively drive the first steel plate (21) and the second steel plate (31) to move toward each other.

7. A concrete permeability testing instrument mold according to claim 6, characterized in that, The first steel plate (21) and the second steel plate (31) are provided with limiting recesses (61) for the piston rod of the movable cylinder (6) to abut.

8. The concrete permeability testing instrument mold according to claim 1, characterized in that, The fastener consists of two sets of oppositely arranged fastening screws (7). The fastening frame (4) has fastening screw holes (41) that cooperate with the fastening screws (7). The two sets of fastening screws (7) respectively push the first steel plate (21) and the second steel plate (31) to press against each other.

9. A concrete permeability testing instrument mold according to claim 8, characterized in that, The ends of the two sets of fastening screws (7) are respectively provided with pressure plates (71) for abutting against the first steel plate (21) and the second steel plate (31). The pressure plates (71) are provided with guide posts (74) parallel to the fastening screws (7) on the upper and lower sides of the fastening screws (7). The fastening frame (4) is provided with guide through holes (42) for the guide posts (74) to pass through.

10. A concrete permeability testing instrument mold according to claim 9, characterized in that, The clamping plate (71) has an abutment groove (72) on the side near the fastening screw (7) and a rolling bearing (73) is provided in the abutment groove (72). The end of the fastening screw (7) is arranged in the inner ring of the rolling bearing (73).

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