A concrete impermeability test mold and impermeability tester

Abstract

The utility model relates to a kind of concrete permeability test mould and permeability tester, the concrete permeability test mould includes base, placing table and mould cylinder, the base is equipped with first water inlet hole and multiple pressure holes, spring is equipped in the pressure hole;The top of the placing table is equipped with recess, second water inlet hole is opened in the recess bottom, the bottom of the placing table is equipped with pressing block, the pressing block slidingly inserts in the pressure hole;The mould cylinder includes sealing body and mounting ring, sealing groove is equipped in the sealing body, the sealing groove includes first sleeve segment and second sleeve segment arranged in upper and lower, the first sleeve segment is matched with the outer periphery of concrete test block, the second sleeve segment is matched with the outer periphery of the placing table;The base is equipped with multiple first screw holes, and the mounting ring is equipped with multiple second screw holes.The utility model does not need to use press to press concrete test block into mould cylinder, it is easy to operate, and can effectively guarantee sealing property.

Description

Technical Field

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

[0002] The impermeability of concrete refers to its ability to resist the penetration of pressurized water, and it is the most fundamental factor determining the durability of concrete. The stepwise pressurization method is a commonly used method for testing the impermeability of concrete. The specific operation involves placing a concrete specimen into a mold, bolting the mold to a mounting plate, and sealing the mold and mounting plate with sealing rings or other sealing components. The mounting plate has water inlet holes for injection. By injecting water into these holes and gradually adjusting the injection pressure, the water is forced to the bottom of the concrete specimen. The top of the specimen is then observed for any seepage, and the impermeability of the concrete is calculated based on the injection pressure.

[0003] Currently, to prevent water from seeping between the concrete specimen and the inner wall of the mold, a layer of paraffin wax is usually wrapped around the outer wall of the concrete specimen before pressing it into the mold. This creates an interference fit between the concrete specimen and the mold, improving the sealing effect of the sidewalls of the concrete specimen. However, this sealing method requires the use of a press to press the concrete specimen into the mold, which is quite cumbersome. Furthermore, the paraffin wax layer on the outer wall of the concrete specimen is prone to wear during pressing into the mold, affecting the sealing effect. In addition, because the concrete specimen and the mold are in an interference fit, separation is difficult, and it is hard to quickly remove the mold after testing. Utility Model Content

[0004] To address the shortcomings of the aforementioned background technology, this utility model provides a concrete impermeability testing mold and impermeability testing instrument to solve the problems of cumbersome operation of pressing concrete specimens into the mold cylinder and difficulty in separating concrete specimens from the mold cylinder.

[0005] A concrete impermeability testing mold includes: a base, the base having a first water inlet hole and multiple pressure holes, each pressure hole containing a spring; a placement platform, the top of the placement platform having a groove, the bottom of the groove having a second water inlet hole that mates with the first water inlet hole, the bottom of the placement platform having a pressure block that slidably inserts into the pressure hole; and a mold cylinder, the mold cylinder including a sealing body and an mounting ring surrounding the outer side of the sealing body, the sealing body having a sealing groove, the sealing groove including a first sleeve section and a second sleeve section arranged vertically, the first sleeve section being a frustum-shaped structure narrower at the top and wider at the bottom, the first sleeve section mates with the outer periphery of the concrete test block, and the second sleeve section mates with the outer periphery of the placement platform; the base having multiple first threaded holes, and the mounting ring having multiple second threaded holes, the first threaded holes corresponding to the second threaded holes.

[0006] In the above technical solution, the concrete test block is a frustum-shaped structure that is narrower at the top and wider at the bottom. It mates with the first connecting segment of the sealing groove. During testing, the concrete test block is placed on the placement platform, and then the mold is fitted onto the concrete test block. At this time, the first connecting segment fits against the outer periphery of the concrete test block, and the second connecting segment fits against the outer periphery of the placement platform. Subsequently, using bolts or other threaded fasteners, the base and the mold are connected together through the first and second threaded holes on the base and the mold. At this time, since the placement platform is pressed against the base, the pressure block compresses the spring in the pressure hole, and the placement platform will always be subjected to the pushing force from the spring, thereby pressing the concrete test block above into the sealing groove, so that the concrete test block fits tightly against the side wall of the sealing groove, effectively ensuring the sealing effect. After the base and the mold are installed, water is introduced into the groove through the first and second water inlets. By adjusting the water injection pressure, the impermeability of the concrete test block is tested.

[0007] In one embodiment, the pressure hole is arranged around the first water inlet hole.

[0008] In the above technical solution, multiple pressure holes are provided and arranged around the first water inlet hole, which can make the top thrust force on the placement platform more evenly distributed.

[0009] In one embodiment, the top of the sealing groove extends through the mold cylinder.

[0010] In the above technical solution, the opening formed by the sealing groove through the top of the mold cylinder allows for easy observation of whether water seeps into the top of the concrete test block.

[0011] In one embodiment, a first sealing ring is provided on the inner wall of the first socket segment, and a second sealing ring is provided on the inner wall of the second socket segment.

[0012] In the above technical solution, the first sealing ring and the second sealing ring are used to enhance the sealing effect between the sealing groove and the concrete test block and the placement platform after the mold is installed.

[0013] In one embodiment, both the first sealing ring and the second sealing ring are inflatable sealing rings, and the mold cylinder is provided with air passages that communicate with the inner cavities of the first sealing ring and the second sealing ring.

[0014] In the above technical solution, both the first sealing ring and the second sealing ring are equipped with air nozzles. The air passage on the mold cylinder is connected to the air nozzles. An external air source can inflate the inner cavity of the first sealing ring and the second sealing ring through the air passage, causing the first sealing ring and the second sealing ring to expand, so as to achieve a seal between the two mating surfaces. After the test is completed, the first sealing ring and the second sealing ring are deflated. At this time, the first sealing ring and the second sealing ring shrink, the friction between the two mating surfaces is reduced, and then the mold cylinder and the concrete test block can be easily separated.

[0015] In one embodiment, a spring fixing block is provided at the bottom of the pressure hole, and the spring is sleeved on the spring fixing block.

[0016] In the above technical solution, the spring fixing block is used to install and limit the spring to prevent it from shifting during movement.

[0017] In one embodiment, the base is provided with a plurality of positioning posts, and the mounting ring is provided with positioning holes that cooperate with the positioning posts.

[0018] In the above technical solution, the positioning pins and positioning holes are used for positioning during the installation of the base and the mold cylinder, which facilitates quick installation.

[0019] In one embodiment, the base is further provided with a plurality of mounting holes.

[0020] In the above technical solution, the base is connected and installed to the impermeability testing equipment through mounting holes.

[0021] In one embodiment, the top of the base is provided with a third sealing ring, which surrounds the first water inlet hole.

[0022] In the above technical solution, after the base and the mold cylinder are installed, the bottom of the placement platform presses the third sealing ring tightly to seal the placement platform and the base and prevent water leakage.

[0023] A permeability testing instrument includes a machine base, a water supply device, and an air supply device, wherein the machine base is used to install a concrete permeability testing mold.

[0024] In the above technical solution, the base of the concrete permeability test mold is installed on the machine platform. The water supply device is used to inject water into the concrete permeability test mold and can adjust the water injection pressure to meet the permeability test requirements. The air supply device is used to supply air to the air-filled sealing ring in the concrete permeability test mold so that it can perform its sealing function normally.

[0025] Compared with the prior art, the beneficial effects of this application are as follows:

[0026] The mold cylinder of this utility model is provided with a sealing groove. The sealing groove includes a first connecting section. The first connecting section is a frustum-shaped structure that is narrow at the top and wide at the bottom. It matches the shape of the concrete test block. After the base and the mold cylinder are connected by threaded fasteners, the pressure block at the bottom of the placement platform compresses the spring in the pressure hole. The placement platform is always subjected to the pushing force from the spring, thereby pressing the concrete test block tightly in the sealing groove, so that the concrete test block is closely attached to the side wall of the sealing groove, effectively ensuring the sealing effect.

[0027] The first connecting section of this utility model is designed as a frustum-shaped structure that is narrow at the top and wide at the bottom, which facilitates the positioning and assembly of the mold cylinder and the concrete test block. In addition, it also facilitates the separation of the sealing sleeve from the concrete test block.

[0028] This invention simply requires placing the mold cylinder onto the concrete test block and then using threaded fasteners to fix the mold cylinder and the base. The operation is simple and does not require the use of a press to press the concrete test block into the mold cylinder. This avoids wear on the paraffin layer on the outer surface of the concrete test block, ensures sealing, and improves the accuracy and reliability of the test results. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional structural diagram of a concrete impermeability test mold according to an embodiment (when the base and the mold cylinder are not combined).

[0031] Figure 2 for Figure 1 A cross-sectional structural diagram of the concrete impermeability test mold (after the base and the mold cylinder are combined).

[0032] Figure 3 for Figure 2 A magnified view of area A in the middle.

[0033] Figure 4 This is a bottom view of the placement platform of this utility model.

[0034] Figure 5 This is a schematic diagram of the installation of the concrete impermeability test mold and impermeability tester of this utility model.

[0035] Explanation of the reference numerals in the figure:

[0036] 1-Base; 11-First water inlet; 12-Pressure hole; 121-Spring fixing block; 13-Spring; 14-First threaded hole; 15-Positioning pin; 16-Mounting hole; 17-Third sealing ring; 2-Placement platform; 21-Groove; 22-Second water inlet; 23-Pressure block; 3-Mold cylinder; 31-Sealing body; 32-Mounting ring; 321-Second threaded hole; 322-Positioning hole; 33-Sealing groove; 331-First sleeve section; 332-Second sleeve section; 34-First sealing ring; 35-Second sealing ring; 36-First air passage; 37-Second air passage; 4-Bolt; 5-Concrete test block; 6-Machine platform; 61-Fixing hole; 62-Water inlet path. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] A concrete impermeability test mold includes a base 1, a placement platform 2, and a mold cylinder 3 arranged sequentially from bottom to top. The base 1 is provided with a first water inlet hole 11 and multiple pressure holes 12. A spring 13 is installed in the pressure hole 12. The top of the placement platform 2 is provided with a groove 21. The bottom of the groove 21 has a second water inlet hole 22 that matches the first water inlet hole 11. The inner diameters of the first water inlet hole 11 and the second water inlet hole 22 are the same and they are coaxially arranged. The bottom of the placement platform 2 is provided with a pressure block 23, which is slidably inserted into the pressure hole 12. The mold cylinder 3 includes a sealing body 31 and an installation ring 32 surrounding the outside of the sealing body 31. The sealing body 31 is provided with a sealing groove 33, which includes a first sleeve section 331 and a second sleeve section 332 arranged vertically. The first sleeve section 331 is a frustum-shaped structure that is narrow at the top and wide at the bottom. The first sleeve section 331 fits with the outer periphery of the concrete test block 5, and the second sleeve section 332 fits with the outer periphery of the placement platform 2. The base 1 is provided with a plurality of first threaded holes 14, and the installation ring 32 is provided with a plurality of second threaded holes 321. The first threaded holes 14 and the second threaded holes 321 are arranged correspondingly.

[0041] The concrete test block 5 has a frustum-shaped structure, narrower at the top and wider at the bottom, to fit the first connecting segment 331 of the sealing groove 33. During testing, the concrete test block 5 is placed on the placement platform 2, and then the mold cylinder 3 is fitted onto the concrete test block 5. At this time, the first connecting segment 331 fits against the outer periphery of the concrete test block 5, and the second connecting segment 332 fits against the outer periphery of the placement platform 2. Then, the bolts 4 are inserted into the first threaded hole 14 and the second threaded hole 321 to fasten the base 1 and the mold cylinder 3 together. At this time, the placement platform 2 is pressed against the base 1, and the pressure block 23 will press down... The compression of the spring 13 inside the hole 12 ensures that the placement platform 2 is always subjected to the pushing force from the spring 13, thereby pressing the concrete test block 5 placed on the placement platform 2 tightly, so that the outer periphery of the concrete test block 5 is tightly fitted with the side wall of the sealing groove 33, effectively ensuring the sealing effect. After the base 1 and the mold cylinder 3 are installed, the first water inlet hole 11 and the second water inlet hole 22 are connected. Water can enter the groove 21 through the first water inlet hole 11 and the second water inlet hole 22. By adjusting the water injection pressure, the water seepage at the top of the concrete test block 5 is observed to test the impermeability of the concrete test block 5.

[0042] It should be noted that the first connecting segment 331 is designed as a frustum shape that is narrower at the top and wider at the bottom. This is to prevent the concrete test block 5 from being pushed upwards when the placement platform 2 is subjected to an upward thrust, so that the concrete test block 5 can be tightly attached to the inner wall of the first connecting segment 331. In addition, the frustum shape facilitates the positioning and fitting of the mold cylinder 3 and the concrete test block 5. It also facilitates the separation of the sealing sleeve from the concrete test block 5. Furthermore, the surface of the concrete test block 5 includes a sealing layer made of paraffin wax. In this application, it is only necessary to put the mold cylinder 3 on the concrete test block 5 and then use bolts 4 to fix the mold cylinder 3 and the base 1. The concrete test block 5 will always be tightly attached to the side wall of the sealing groove 33 under the action of the spring 13. There is no need to use a press to press the concrete test block 5 into the mold cylinder 3. The operation is simple and the practicality is better.

[0043] Preferably, in order to ensure that the spring 13 exerts a uniform pushing force on the placement platform 2, four pressure holes 12 and four pressure blocks 23 are provided. The four pressure holes 12 are distributed around the first water inlet hole 11 at equal included angles. A spring 13 is provided in each pressure hole 12, and the pressure block 23 is provided in correspondence with the pressure hole 12.

[0044] Preferably, the outer periphery of the base 1, the placement platform 2, and the sealing body 31 and mounting ring 32 of the mold cylinder 3 are all circular.

[0045] In this embodiment, the top of the sealing groove 33 extends through the mold cylinder 3. The opening formed by the sealing groove 33 extending through the top of the mold cylinder 3 allows for easy observation of whether water seeps into the top of the concrete test block 5.

[0046] In this embodiment, a first sealing ring 34 is provided on the inner wall of the first sleeve section 331, and a second sealing ring 35 is provided on the inner wall of the second sleeve section 332. The first sealing ring 34 and the second sealing ring 35 are used to enhance the sealing effect between the sealing groove 33 and the concrete test block 5 and the placement platform 2 after the mold cylinder 3 is installed.

[0047] Preferably, both the first sealing ring 34 and the second sealing ring 35 are inflatable sealing rings, and both are equipped with air nozzles (not specifically shown in the figure). The mold cylinder 3 is provided with a first air passage 36 and a second air passage 37. The first air passage 36 is connected to the air nozzle of the first sealing ring 34, and the second air passage 37 is connected to the air nozzle of the second sealing ring 35. An external air source can inflate the inner cavities of the first sealing ring 34 and the second sealing ring 35 through the first air passage 36 and the second air passage 37, causing the first sealing ring 34 and the second sealing ring 35 to expand and seal the two mating surfaces. In actual use, after the mold cylinder 3 is installed with the base 1, the first sealing ring 34 and the second sealing ring 35 are inflated by an external air source, causing them to expand and seal. After the test, the first sealing ring 34 and the second sealing ring 35 are deflated. At this time, the first sealing ring 34 and the second sealing ring 35 contract, reducing the friction between the two mating surfaces. Then, the bolt 4 is loosened, and the mold cylinder 3 can be easily removed.

[0048] It should be noted that the inner wall of the sealing groove 33 is provided with an annular groove for installing the first sealing ring 34 and the second sealing ring 35. The annular groove for fixing the first sealing ring 34 is located slightly above the connection position of the first sleeve section 331 and the second sleeve section 332, which can play a certain role in avoiding the placement platform 2, so that the placement platform 2 can be slightly raised under the pushing force of the spring 13, ensuring that the outer periphery of the concrete test block 5 can be tightly attached to the first sleeve section 331.

[0049] In this embodiment, a third sealing ring 17 is provided on the top of the base 1. The third sealing ring 17 is arranged around the first water inlet hole 11. After the base 1 and the mold cylinder 3 are installed, the bottom of the placement platform 2 presses the third sealing ring 17 tightly, so that the placement platform 2 and the base 1 are sealed to prevent water leakage during water injection.

[0050] In this embodiment, a spring fixing block 121 is provided at the bottom of the pressure hole 12, and the spring 13 is sleeved on the spring fixing block 121. The spring fixing block 121 is used to install and limit the spring 13 to prevent it from shifting during movement.

[0051] In this embodiment, the base 1 is provided with positioning posts 15 and mounting holes 16, and the mounting ring 32 of the mold cylinder 3 is provided with positioning holes 322 that cooperate with the positioning posts 15. The positioning posts 15 and positioning holes 322 are used for positioning when the base 1 and the mold cylinder 3 are installed, so as to facilitate quick alignment and installation. The mounting holes 16 are used to connect the base 1 to the impermeability testing equipment. In specific implementation, the number of positioning posts 15 and mounting holes 16 can be flexibly adjusted as needed.

[0052] In another embodiment, a permeability tester is provided, which includes a machine base 6, a water supply device and an air supply device (only the machine base 6 is shown in the figure, and the water supply device and the air supply device are not specifically shown). The machine base 6 is provided with a fixing hole 61 that mates with the mounting hole 16, so that the base 1 can be mounted on the machine base 6.

[0053] Specifically, the machine base 6 is provided with a water inlet passage 62 connected to the first water inlet hole 11. The water supply device is connected to the first water inlet hole 11 through the water inlet passage 62, so that water can be injected into the first water inlet hole 11. By adjusting the water injection pressure, the impermeability of the concrete test block 5 can be tested. The air supply device is connected to the first air passage 36 and the second air passage 37 respectively, and is used to supply air to the first sealing ring 34 and the second sealing ring 35 so that they can perform their sealing function normally.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0055] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A concrete permeability test mould characterised in that, include: The base is provided with a first water inlet hole and multiple pressure holes, and a spring is provided in each pressure hole; The placement platform has a groove on its top and a second water inlet hole at the bottom of the groove that matches the first water inlet hole. The bottom of the placement platform has a pressure block that is slidably inserted into the pressure hole. The mold cylinder includes a sealing body and an installation ring surrounding the outside of the sealing body. The sealing body has a sealing groove, which includes a first sleeve section and a second sleeve section arranged vertically. The first sleeve section is a frustum-shaped structure that is narrower at the top and wider at the bottom. The first sleeve section fits with the outer periphery of the concrete test block, and the second sleeve section fits with the outer periphery of the placement platform. The base is provided with a plurality of first threaded holes, and the mounting ring is provided with a plurality of second threaded holes, with the first threaded holes and the second threaded holes being configured correspondingly.

2. The concrete impermeability test mold according to claim 1, characterized in that, The pressure hole is arranged around the first water inlet hole.

3. The concrete impermeability test mold according to claim 1, characterized in that, The top of the sealing groove extends through the mold cylinder.

4. The concrete impermeability test mold according to claim 1, characterized in that, The inner wall of the first socket section is provided with a first sealing ring, and the inner wall of the second socket section is provided with a second sealing ring.

5. The concrete impermeability test mold according to claim 4, characterized in that, Both the first and second sealing rings are inflatable sealing rings, and the mold cylinder is provided with air passages that communicate with the inner cavities of the first and second sealing rings.

6. The concrete impermeability test mold according to claim 1, characterized in that, A spring fixing block is provided at the bottom of the pressure hole, and the spring is sleeved on the spring fixing block.

7. The concrete impermeability test mold according to claim 1, characterized in that, The base is provided with multiple positioning posts, and the mounting ring is provided with positioning holes that cooperate with the positioning posts.

8. The concrete impermeability test mold according to claim 1, characterized in that, The base is also provided with multiple mounting holes.

9. The concrete impermeability test mold according to claim 1, characterized in that, The base is provided with a third sealing ring at the top, which surrounds the first water inlet hole.

10. A permeability testing instrument, characterized in that, The device includes a machine for installing the concrete impermeability test mold according to any one of claims 1 to 8, and also includes a water supply device and an air supply device.

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