A multi-channel concrete permeability testing device

Abstract

This utility model discloses a multi-channel concrete impermeability testing device, relating to the field of concrete testing technology. It includes a testing machine body with a connecting ring fixed to the top. A mold cylinder is detachably connected to the upper end of the connecting ring, and a water passage hole is formed inside the connecting ring. An anti-clogging filter plate is detachably and fixedly embedded at the upper opening of the connecting ring. Multiple vertically penetrating irregularly shaped anti-clogging holes are formed on the anti-clogging filter plate, all of which communicate with the water passage hole. Irregularly shaped support holes are also formed inside the anti-clogging filter plate. This utility model, through the arrangement of irregularly shaped anti-clogging holes and support holes, creates a three-dimensional and varied anti-clogging channel on the anti-clogging filter plate, thereby achieving a good anti-clogging effect. At the same time, it continues the traditional bottom water injection testing method. Therefore, while achieving the anti-clogging effect, it retains the function of allowing users to observe the concrete test specimen in real time, thus providing more accurate test results.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and in particular to a multi-channel concrete impermeability testing device. Background Technology

[0002] The traditional method for testing the permeability of concrete is to place a concrete permeability test block on a permeability testing instrument and apply water pressure from the bottom of the concrete using a water pump. During the test, staff can visually observe the water seepage at the top of the concrete test block and obtain the permeability data of the concrete test block by combining the parameters displayed on the device.

[0003] A search revealed a concrete permeability testing device disclosed in patent document CN220552749U, comprising a permeability testing chamber, permeability test molds, a cover plate, and a water injection unit. The permeability testing chamber has multiple grooves, each containing a permeability test mold. The cover plate is positioned on top of the grooves and is sealed to the grooves and the permeability test molds within them. The water injection unit communicates with water injection holes on the cover plate for injecting water into each permeability test mold. This concrete permeability testing device effectively avoids the blockage of pressurized pipes caused by prolonged water pressure on the concrete bottom surface during testing, as seen in conventional concrete permeability testers, significantly reducing equipment maintenance costs. Furthermore, it optimizes the sealing performance of the permeability test blocks, avoiding complex and cumbersome sealing processes and ensuring the accuracy of the test data.

[0004] Based on the above research and existing technology, it has been found that while existing multi-channel (referring to multiple pressurized channels at testing stations) concrete permeability testing devices can reduce the probability of blockage in the pressurized channels (pipelines), they achieve this by inverting the mold inside the testing machine and injecting water from the top. However, this method prevents operators from directly observing the leakage of the concrete test specimens; the specimens can only be removed and read uniformly after the test is completed. Furthermore, existing multi-channel concrete permeability testing devices are often used to test different concrete specimens, each with varying permeability resistance. The lack of timely observation of leakage after testing, and the inability to correlate the leakage with the corresponding infiltration time, leads to inaccurate permeability data for some concrete specimens, failing to fully meet actual testing requirements. Therefore, a multi-channel concrete permeability testing device is needed. Utility Model Content

[0005] The purpose of this application is to provide a multi-channel concrete impermeability testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a multi-channel concrete impermeability testing device, including a testing machine body, a connecting ring fixed on the top of the testing machine body, a mold cylinder detachably connected to the upper end of the connecting ring, and a water inlet and outlet hole opened in the connecting ring;

[0007] An anti-clogging filter plate is detachably and fixedly embedded at the upper opening of the connecting ring. The anti-clogging filter plate has multiple irregularly shaped anti-clogging holes that penetrate vertically through it. These irregularly shaped anti-clogging holes are distributed circumferentially along the central axis of the anti-clogging filter plate and are all connected to the water passage holes.

[0008] The anti-clogging filter plate is also provided with irregularly shaped support holes. Multiple irregularly shaped support holes are connected to multiple pairs of adjacent irregularly shaped anti-clogging holes. All the irregularly shaped support holes extend downward at an angle, and the shape and size of the irregularly shaped support holes are different from those of the irregularly shaped anti-clogging holes.

[0009] As a further supplement to this solution, the connecting ring fits into the top of the concrete test body to form a recessed groove in the middle, and the anti-clogging filter plate is located at the bottom of the groove of the connecting ring.

[0010] As a further supplement to this solution, the top center and all four sides of the anti-clogging filter plate protrude upwards. The protrusion height around the anti-clogging filter plate is consistent with the bottom height of the groove of the connecting ring. An agglomeration groove is formed between the protrusion in the center and the protrusion around the perimeter of the anti-clogging filter plate. The irregular anti-clogging hole is opened to avoid the agglomeration groove.

[0011] As a further supplement to this solution, the middle of the connecting ring is provided with an insert groove for accommodating the anti-clogging filter plate. The periphery of the anti-clogging filter plate is fixed to the inner side of the insert groove by a threaded connection, and the water passage hole is opened in the insert groove.

[0012] As a further supplement to this solution, the bottom of the anti-clogging filter plate has an upwardly recessed arc-shaped bottom wall, and an arc-shaped connecting cavity is formed between the arc-shaped bottom wall and the bottom wall of the mounting groove. The irregular anti-clogging hole and the water passage hole are connected through the arc-shaped connecting cavity.

[0013] As a further supplement to this solution, a connecting groove is also provided on the upper part of the connecting ring, and a connecting protrusion ring is formed at the lower end of the mold cylinder that is embedded in the connecting groove. The lower end of the mold cylinder is fixed in the connecting groove by a threaded structure.

[0014] As a further supplement to this solution, a sealing gasket is fixedly sleeved inside the connecting groove, and the outer wall of the sealing gasket is interference-fitted with the inner wall of the connecting convex ring of the mold cylinder.

[0015] In summary, the technical effects and advantages of this utility model are as follows:

[0016] 1. In this utility model, the irregular anti-clogging holes and irregular support holes opened on the anti-clogging filter plate form a three-dimensional and variable anti-clogging channel on the anti-clogging filter plate, thereby achieving a good anti-clogging effect. At the same time, it continues the traditional bottom water injection test method. Therefore, while achieving the anti-clogging effect, it retains the function of allowing users to observe the concrete test body in real time, thus providing more accurate test results and fully meeting the actual test needs. The test effect is better when using this multi-channel concrete impermeability test device.

[0017] 2. In this utility model, by setting up the collecting ring groove, the concrete slag that gathers from the periphery to the center and the concrete slag that falls off from the center are all collected in the collecting ring groove by the structure of the anti-clogging filter plate. When the user removes the anti-clogging filter plate, the concrete slag can be collected and taken out, which is convenient for the centralized treatment of the concrete slag that falls off during the test. The operation is convenient. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment;

[0020] Figure 2 This is a side sectional view of the connecting ring, mold cylinder, sealing gasket, threaded structure, and anti-clogging filter plate in this embodiment;

[0021] Figure 3 This is a schematic diagram of the disassembled structure of the connecting ring and the anti-clogging filter plate in this embodiment;

[0022] Figure 4 This is a half-sectional view of the anti-clogging filter plate in this embodiment;

[0023] Figure 5 for Figure 4 Enlarged view of the structure (irregular anti-clogging hole) at point A in the image.

[0024] In the figure: 1. Test machine body; 2. Connecting ring; 21. Water passage hole; 22. Connecting groove; 23. Insertion groove; 3. Mold cylinder; 4. Sealing gasket; 5. Threaded structure; 6. Anti-clogging filter plate; 61. Irregular anti-clogging hole; 611. Irregular support hole; 62. Gathering ring groove; 63. Arc-shaped bottom wall. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0026] Example: Reference Figures 1-4 The multi-channel concrete impermeability test device shown includes a test machine body 1. The specific structure and working principle of the test machine body 1 are existing technologies and are well known to those skilled in the art, and will not be described in detail here. A connecting ring 2 is fixed on the top of the test machine body 1. A mold cylinder 3 is detachably connected to the upper end of the connecting ring 2. A water inlet and outlet water passage hole 21 is opened in the connecting ring 2.

[0027] The upper opening of the connecting ring 2 is detachably and fixedly fitted with an anti-clogging filter plate 6. The anti-clogging filter plate 6 has multiple vertically penetrating irregularly shaped anti-clogging holes 61 (generally circular, square, or polygonal, see reference). Figure 5 As shown, in this embodiment, a hole with an overall circular shape and an irregularly convex or concave triangular perimeter is selected. Holes with different cross-sectional shapes and sizes can also be designed according to the characteristics of the concrete test body. Multiple irregular anti-clogging holes 61 are distributed around the circumference of the anti-clogging filter plate 6, and multiple irregular anti-clogging holes 61 are connected to the water passage hole 21.

[0028] The anti-clogging filter plate 6 is also provided with irregularly shaped support holes 611. Multiple irregularly shaped support holes 611 are connected to multiple pairs of adjacent irregularly shaped anti-clogging holes 61. Multiple irregularly shaped support holes 611 extend downward at an angle, and the shape and size of the irregularly shaped support holes 611 are different from those of the irregularly shaped anti-clogging holes 61.

[0029] Based on the above structure, the irregular anti-clogging holes 61 and irregular support holes 611 opened on the anti-clogging filter plate 6 form a three-dimensional and variable (diameter not dynamically changing) anti-clogging channel on the anti-clogging filter plate 6 (because of its irregular shape, the concrete slag produced under pressure is basically a relatively regular sheet or particle, which is difficult to enter the three-dimensional irregular hole), thus achieving a good anti-clogging effect. At the same time, it continues the traditional bottom water injection test method. Therefore, while achieving the anti-clogging effect, it retains the function of allowing users to observe the concrete test body in real time, thus providing more accurate test results and fully meeting the actual test needs. The test effect is better when using this multi-channel concrete impermeability test device.

[0030] Furthermore, the connecting ring 2 fits into the top of the concrete test body to form a recessed groove in the center, and the anti-clogging filter plate 6 is located at the bottom of the groove of the connecting ring 2, which allows the surrounding detached concrete debris to converge towards the center.

[0031] The top center and all sides of the anti-clogging filter plate 6 protrude upwards. The protrusion height of the anti-clogging filter plate 6 is consistent with the bottom height of the groove of the connecting ring 2. An agglomeration groove 62 is formed between the protrusion in the middle and the protrusion around the perimeter of the anti-clogging filter plate 6. The irregular anti-clogging hole 61 is opened to avoid the agglomeration groove 62.

[0032] With the setting of the collecting ring groove 62, the concrete slag that gathers from the periphery to the center and the concrete slag that falls off from the center are all collected in the collecting ring groove 62 by the structure of the anti-clogging filter plate 6. When the user removes the anti-clogging filter plate 6, the concrete slag can be collected and taken out, which is convenient for the centralized treatment of the concrete slag that falls off during the test. The operation is convenient.

[0033] Furthermore, the connecting ring 2 has an inlay groove 23 in the middle for accommodating the anti-clogging filter plate 6. The periphery of the anti-clogging filter plate 6 and the inner side of the inlay groove 23 are screwed together by a threaded structure 5 (the fit between the threaded groove and the threaded part in the prior art can be used. This structure is common knowledge and will not be described in detail here). The water passage hole 21 is opened in the inlay groove 23, so that the anti-clogging filter plate 6 and the connecting ring 2 can be detachably connected, which is convenient for cleaning and maintaining the anti-clogging filter plate 6.

[0034] Meanwhile, the bottom of the anti-clogging filter plate 6 has an upwardly recessed arc-shaped bottom wall 63, and an arc-shaped connecting cavity is formed between the arc-shaped bottom wall 63 and the inner bottom wall of the mounting groove 23. The irregular anti-clogging hole 61 and the water passage hole 21 are connected through the arc-shaped connecting cavity, which can meet the need for multiple irregular anti-clogging holes 61 and water passage holes 21 to be interconnected.

[0035] Furthermore, the upper part of the connecting ring 2 is provided with a connecting groove 22, and the lower end of the mold cylinder 3 is formed with a connecting protrusion ring embedded in the connecting groove 22. The lower end of the mold cylinder 3 is screwed and fixed in the connecting groove 22 by the threaded structure 5, so as to realize the detachable connection between the mold cylinder 3 and the connecting ring 2.

[0036] To ensure good sealing at the connection and meet the requirements for testing, a sealing gasket 4 is fixedly sleeved inside the connecting groove 22, and the outer wall of the sealing gasket 4 is interference-fitted with the inner wall of the connecting convex ring of the mold cylinder 3.

[0037] The working principle of this utility model is as follows: In daily use, the user first places the concrete test body in the mold cylinder 3, then screws the mold cylinder 3 onto the connecting ring 2 through the threaded structure 5, and uses the sealing gasket 4 to form a sealing structure. Then, water is introduced into the bottom of the mold cylinder 3 through the water inlet 21, and the concrete test body is pressurized. The leakage status of the concrete test body is observed according to the existing conventional process, and combined with the data displayed in real time on the testing machine body 1, the impermeability data of the concrete test body at the corresponding station is obtained, and the impermeability test of the concrete test body is completed.

[0038] The anti-clogging filter plate 6 forms a three-dimensional anti-clogging channel through the irregular anti-clogging holes 61 and irregular support holes 611, which reduces the probability of clogging and achieves a good anti-clogging effect. When the concrete test body produces concrete slag under pressure, the concrete slag falls downward and lands in the groove of the connecting ring 2 or on the anti-clogging filter plate 6. The slag in the connecting ring 2 gathers towards the center along the groove (some concrete slag may adhere to the groove wall, but it will still be carried towards the center by the water flow during drainage), and finally gathers in the gathering ring groove 62 of the anti-clogging filter plate 6. After the test is completed, the user only needs to rotate the anti-clogging filter plate 6 to remove the anti-clogging filter plate 6 for cleaning and maintenance, which makes it convenient for the user to clean up the fallen concrete slag. The operation is convenient.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-channel concrete permeability testing device, comprising a testing machine body (1), wherein a connecting ring (2) is fixed to the top of the testing machine body (1), and a mold cylinder (3) is detachably connected to the upper end of the connecting ring (2), and a water inlet (21) is provided inside the connecting ring (2) for water inlet and outlet, characterized in that: The upper opening of the connecting ring (2) is detachably and fixedly fitted with an anti-clogging filter plate (6). The anti-clogging filter plate (6) has multiple vertically penetrating irregular anti-clogging holes (61). The multiple irregular anti-clogging holes (61) are distributed circumferentially along the central axis of the anti-clogging filter plate (6). The multiple irregular anti-clogging holes (61) are all connected to the water passage hole (21). The anti-clogging filter plate (6) is also provided with irregularly shaped support holes (611). Multiple irregularly shaped support holes (611) are connected to multiple pairs of adjacent irregularly shaped anti-clogging holes (61). Multiple irregularly shaped support holes (611) extend downward at an angle, and the irregularly shaped support holes (611) are different in shape and size from the irregularly shaped anti-clogging holes (61).

2. A multi-pass concrete impermeability testing device according to claim 1, wherein: The connecting ring (2) fits against the top of the concrete test body to form a recessed groove in the middle, and the anti-clogging filter plate (6) is located at the bottom of the groove of the connecting ring (2).

3. A multi-pass concrete impermeability testing device according to claim 2, wherein: The top center and all sides of the anti-clogging filter plate (6) protrude upwards. The protrusion height of the anti-clogging filter plate (6) is consistent with the bottom height of the groove of the connecting ring (2). An agglomeration groove (62) is formed between the protrusion in the middle and the protrusion around the perimeter of the anti-clogging filter plate (6). The irregular anti-clogging hole (61) is opened to avoid the agglomeration groove (62).

4. A multi-pass concrete impermeability testing device according to claim 1, wherein: The connecting ring (2) has an insert groove (23) in the middle for accommodating the anti-clogging filter plate (6). The periphery of the anti-clogging filter plate (6) is screwed to the inner side of the insert groove (23) by a threaded structure (5). The water passage hole (21) is opened in the insert groove (23).

5. A multi-pass concrete impermeability testing device according to claim 4, wherein: The bottom of the anti-clogging filter plate (6) has an upwardly recessed arc-shaped bottom wall (63), and an arc-shaped connecting cavity is formed between the arc-shaped bottom wall (63) and the inner bottom wall of the mounting groove (23). The irregular anti-clogging hole (61) and the water passage hole (21) are connected through the arc-shaped connecting cavity.

6. A multi-channel concrete permeability testing device according to any one of claims 1-5, characterized in that: The upper part of the connecting ring (2) is also provided with a connecting groove (22), and the lower end of the mold cylinder (3) is formed with a connecting protrusion ring embedded in the connecting groove (22). The lower end of the mold cylinder (3) is screwed and fixed in the connecting groove (22) by a threaded structure (5).

7. A multi-pass permeability test device for concrete according to claim 6, wherein: A sealing gasket (4) is fixedly sleeved on the inner side of the connecting groove (22), and the outer wall of the sealing gasket (4) is interference-fitted with the inner wall of the connecting convex ring of the mold cylinder (3).

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