A ready-mixed concrete permeability detection device

Abstract

This utility model discloses a premixed concrete permeability testing device, belonging to the technical field of permeability testing equipment. The device includes a body for testing concrete permeability, and further includes: a fixed mold movably mounted on the body, the fixed mold having a positioning groove for limiting movement; a movable mold detachably mounted on the fixed mold, and a positioning block adapted to the positioning groove fixedly mounted on the movable mold; and a locking member movably mounted on the fixed mold, both the fixed and movable molds having locking grooves on their cylindrical surfaces, and the locking member movably mounted within the locking grooves. This utility model, by replacing the traditional integrated mold with a separate mold formed by the fixed and movable molds, facilitates the installation of cement specimens into the mold, avoiding the need for external equipment to press the cement specimens into the mold, effectively improving the convenience of installing cement specimens.

Description

Technical Field

[0001] This utility model relates to the field of permeability testing equipment, and in particular to a permeability testing device for ready-mixed concrete. Background Technology

[0002] Ready-mixed concrete needs to be tested for permeability. The general testing method is to pour the ready-mixed concrete into a cylindrical concrete column, then insert the concrete column into a mold, and then fix the mold on the testing equipment for permeability testing. The permeability of concrete directly determines its durability. The penetration of media such as moisture and chloride ions can cause steel corrosion, freeze-thaw damage and chemical erosion, leading to structural deterioration. Using permeability testing equipment can quantitatively assess the impermeability performance, verify the construction quality and the effectiveness of seepage prevention measures, and provide a basis for the diagnosis of damage to existing structures.

[0003] The concrete permeability testing equipment mainly consists of a pressure loading system, a loading mold, a media supply device, and a data acquisition unit. During use, a standard concrete specimen is first sealed and fixed in the loading mold. A constant water pressure or air pressure is applied by a pressure pump. Sensors monitor the seepage flow rate, seepage depth, or electrical flux in real time. The testing process simulates the media seepage environment. Based on parameters such as seepage height and current value, the permeability grade is quantitatively evaluated according to relevant standards, providing key data support for concrete durability design and maintenance.

[0004] In existing concrete permeability testing equipment, the loading mold is usually an integrated cast-in-place structure. When testing the permeability of cement-based materials, in order to ensure the sealing between the specimen and the inner cavity of the loading mold, an interference fit is required by a sealing ring fitted on the outside of the specimen. This fit means that the specimen must be installed and embedded in the inner cavity of the loading mold with the help of external pressure equipment. Correspondingly, the process of removing the specimen from the mold after the test is also significantly inconvenient and difficult. Utility Model Content

[0005] The purpose of this invention is to solve the problem of inconvenience in installing cement specimens in the loading mold in the prior art, and to propose a premixed concrete permeability testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A ready-mixed concrete permeability testing device includes a body for testing concrete permeability, and further includes: a fixed mold movably mounted on the body, the fixed mold having a positioning groove for limiting movement, wherein a movable mold is detachably mounted on the fixed mold, and a positioning block adapted to the positioning groove is fixedly mounted on the movable mold, and when the positioning block is inserted into the positioning groove, an annular sealed space is formed between the fixed mold and the movable mold; and a locking member movably mounted on the fixed mold, both the fixed mold and the movable mold having locking grooves on their cylindrical surfaces, and the locking member being movably mounted within the locking grooves.

[0008] To improve the fastening effect after the fixed mold and the movable mold are closed, preferably, the locking component includes a fixed ring movably installed in the locking groove, and a locking block is fixedly installed on the inner cylindrical surface of the fixed ring. When the locking block slides, the fixed ring unlocks or locks the fixed mold and the movable mold.

[0009] To facilitate the installation of the fixing ring, the bottom end of the fixing ring is provided with an inclined surface, and the inclination angle of the inclined surface is in the range of 30-45 degrees.

[0010] To facilitate the installation of the fixed mold and the movable mold, preferably, a flange is fixedly installed on the fixed mold, the bottom of the flange is provided with a flange, and a rubber ring is sleeved on the outside of the flange.

[0011] To improve the sealing effect, preferably, sealing rings are arranged at equal intervals in the annular sealing space, and the sealing rings are installed in the mounting grooves opened in the fixed mold and the movable mold.

[0012] To further improve the sealing performance between the cement column and the fixed and movable molds, the ratio of the diameter of the mounting groove to the diameter of the sealing ring is 9:10, and an interference fit is formed between the side wall of the mounting groove and the sealing ring.

[0013] Compared with the prior art, this utility model provides a device for testing the permeability of ready-mixed concrete, which has the following beneficial effects:

[0014] 1. This ready-mixed concrete permeability testing equipment uses a combination of fixed and movable molds, replacing the traditional integrated mold with a split mold. This facilitates the installation and disassembly of cement specimens, avoiding the need to press cement specimens into the mold using external pressure equipment, and effectively improving the ease of use of this application.

[0015] 2. This ready-mixed concrete permeability testing equipment, by utilizing the locking components, can effectively enhance the combination of the fixed mold and the movable mold. Since the cement specimen is interference-fitted with the fixed mold and the movable mold through the sealing components, the problem of reduced sealing caused by the movement of the movable mold is avoided, thereby improving the accuracy of the data when testing the cement permeability in this application.

[0016] The parts not involved in this device are the same as or can be implemented using existing technology. This utility model replaces the traditional integrated mold with a split mold formed by a fixed mold and a movable mold, which facilitates the installation of cement specimens into the mold and avoids the need to use external equipment to press the cement specimens into the mold, effectively improving the convenience of installing cement specimens in this application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the isometric structure of a premixed concrete permeability testing device proposed in this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of a premixed concrete permeability testing device proposed in this utility model;

[0019] Figure 3 Schematic diagram of the exploded structure of the mold for a premixed concrete permeability testing device proposed in this utility model. Figure 1 ;

[0020] Figure 4 Schematic diagram of the exploded structure of the mold for a premixed concrete permeability testing device proposed in this utility model. Figure 2 .

[0021] In the diagram: 1. Body; 2. Fixed mold; 21. Positioning groove; 22. Flange; 3. Movable mold; 31. Positioning block; 4. Locking groove; 5. Fixed ring; 51. Clamping block; 6. Sealing ring; 7. Rubber ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0024] Reference Figures 1-4A premixed concrete permeability testing device includes a body 1 for testing concrete permeability, and further includes: a fixed mold 2 movably mounted on the body 1, the fixed mold 2 having a positioning groove 21 for limiting positioning, a movable mold 3 detachably mounted on the fixed mold 2, and a positioning block 31 adapted to the positioning groove 21 fixedly mounted on the movable mold 3. When the positioning block 31 is inserted into the positioning groove 21, an annular sealed space is formed between the fixed mold 2 and the movable mold 3. Cement specimens are installed first on the fixed mold 2, and then the movable mold 3 is installed, which facilitates the installation of cement specimens into the annular sealed space, thereby avoiding the need to use external pressure equipment to press the cement specimens into the mold, effectively improving the convenience of cement specimen installation; a locking element is movably mounted on the fixed mold 2, and locking grooves 4 are formed on the cylindrical surfaces of both the fixed mold 2 and the movable mold 3, and the locking element is movably mounted in the locking grooves 4. The locking element can prevent the movable mold 3 from moving after the cement specimen is installed, effectively improving the sealing effect after the cement specimen is installed.

[0025] Specifically, by using the fixed mold 2 and the movable mold 3 together, the traditional integrated mold is replaced with a split mold, which facilitates the installation and disassembly of cement specimens and avoids the need to press the cement specimens into the mold using external pressure equipment, thus effectively improving the convenience of using this application.

[0026] The locking component includes a fixed ring 5 movably installed in the locking groove 4. A locking block 51 is fixedly installed on the inner cylindrical surface of the fixed ring 5. When the locking block 51 slides, the fixed ring 5 unlocks or locks with the fixed mold 2 and the movable mold 3. When the locking block 51 slides out from the locking part provided in the locking groove 4, the fixed ring 5 unlocks with the fixed mold 2 and the movable mold 3, making it easy to remove the movable mold 3 and remove the cement specimen. Conversely, after the locking block 51 slides into the locking part, the fixed ring 5 locks with the fixed mold 2 and the movable mold 3, making it easy to install and fix the cement specimen in the annular sealed space, thereby facilitating the permeability test of the cement specimen.

[0027] Specifically, by utilizing the locking mechanism, the combination of the fixed mold 2 and the movable mold 3 can be effectively improved. Since the cement specimen is interference-fitted with the fixed mold 2 and the movable mold 3 through the sealing mechanism, the problem of reduced sealing caused by the movement of the movable mold 3 is avoided, thereby improving the accuracy of the data when testing the cement permeability in this application.

[0028] The bottom end of the fixing ring 5 is provided with an inclined surface, and the inclination angle of the inclined surface is in the range of 30-45 degrees. The preferred inclination angle of the inclined surface in this application is 45 degrees. The 45-degree inclined surface can easily adapt to the edges of the fixed mold 2 and the movable mold 3, so that the positioning ring is sleeved on the outer cylindrical surface of the mold, thereby making the fixed mold 2 and the movable mold 3 clamp the cement specimen, improving the sealing performance between the cement specimen and the annular sealing space, and avoiding the problem of insufficient sealing affecting the test data.

[0029] A flange 22 is fixedly installed on the fixed mold 2. The bottom of the flange 22 is provided with a flange, and a rubber ring 7 is fitted on the outside of the flange. By using the flange and rubber ring 7 at the bottom of the flange 22, the sealing performance of the fixed mold 2 after it is installed on the machine body 1 is improved, thus preventing some liquid from seeping out from the connection between the mold and the machine body 1 and affecting the test results.

[0030] Sealing rings 6 are arranged at equal intervals within the annular sealed space. The sealing rings 6 are installed in the mounting grooves opened in the fixed mold 2 and the movable mold 3. The ratio of the diameter of the mounting groove to the diameter of the sealing ring is 9:10. In this application, the diameters of the sealing ring and the mounting groove are set to 2 mm and 1.8 mm, respectively, thereby achieving an interference fit between the side wall of the mounting groove and the sealing ring 6. The sealing ring 6 is fitted onto the outside of the cement specimen, thereby improving the sealing performance of the cement specimen after installation. At the same time, the sealing ring 6 is in an interference fit with the mounting groove, and the sealing ring 6 is subjected to pressure and undergoes a certain deformation, which compensates for some of the grooves on the surface of the cement specimen, further improving the sealing effect, thereby enabling more accurate testing of the impermeability of the cement specimen.

[0031] In this invention, the sealing ring 6 is first fitted onto the cylindrical surface of the cement specimen. Then, the cement specimen and sealing ring 6 are installed onto the inner side of the fixed mold 2. Next, the positioning block 31 is aligned with the positioning groove 21, and the movable mold 3 is installed with the fixed mold 2, completing the initial positioning installation. Then, the positioning ring is installed on the outer side of the fixed mold 2 and the movable mold 3. The positioning ring is then rotated clockwise, causing the locking block 51 to enter the locking part of the locking groove 4, thus completing the positioning ring installation. At this point, the fixed mold 2 and the movable mold 3 are tightly fitted, allowing for the permeability test and detection of the cement specimen. After the test is completed, the positioning ring is rotated counterclockwise, unlocking the locking block 51 from the locking part and removing the positioning ring. This unlocks the fixed mold 2 and the movable mold 3, allowing the movable mold 3 to detach from the fixed mold 2 and the tested cement specimen to be removed. This effectively improves the convenience of use and avoids the problem of traditional integrated molds requiring external pressure equipment to install the cement specimen into the mold.

[0032] 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 the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for testing the permeability of ready-mixed concrete, comprising a body (1) for testing the permeability of concrete, characterized in that, Also includes: A fixed mold (2) is installed on the body (1), and a positioning groove (21) for limiting the position is provided on the fixed mold (2). Among them, a movable mold (3) is disassembled and installed on the fixed mold (2), and a positioning block (31) adapted to the positioning groove (21) is fixedly installed on the movable mold (3). When the positioning block (31) is inserted into the positioning groove (21), an annular sealing space is formed between the fixed mold (2) and the movable mold (3). The locking component is movably installed on the fixed mold (2). Both the fixed mold (2) and the movable mold (3) have locking grooves (4) on their cylindrical surfaces, and the locking component is movably installed in the locking grooves (4).

2. The ready-mixed concrete permeability testing device according to claim 1, characterized in that, The locking component includes a fixed ring (5) movably installed in the locking groove (4). A locking block (51) is fixedly installed on the inner cylindrical surface of the fixed ring (5). When the locking block (51) slides, the fixed ring (5) unlocks or locks the fixed mold (2) and the movable mold (3).

3. The ready-mixed concrete permeability testing device according to claim 2, characterized in that, The bottom end of the fixing ring (5) is provided with an inclined surface, and the inclination angle of the inclined surface is in the range of 30-45 degrees.

4. The ready-mixed concrete permeability testing device according to claim 1, characterized in that, A flange (22) is fixedly installed on the fixed mold (2). A flange is provided at the bottom of the flange (22), and a rubber ring (7) is sleeved on the outside of the flange.

5. The ready-mixed concrete permeability testing device according to claim 1, characterized in that, The annular sealed space contains equidistant sealing rings (6), which are installed in the mounting slots of the fixed mold (2) and the movable mold (3).

6. The ready-mixed concrete permeability testing device according to claim 5, characterized in that, The ratio of the diameter of the mounting groove to the diameter of the sealing ring is 9:10, and an interference fit is formed between the side wall of the mounting groove and the sealing ring (6).

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