Concrete test piece sealing device for anti-permeability tester and intelligent anti-permeability tester

Abstract

The utility model provides a concrete test piece sealing device for an anti-permeability instrument, which belongs to the technical field of concrete anti-permeability detection and comprises a test piece base, a pile casing and the test piece base are coaxially arranged and positioned on the outer side of a test piece, and axial limiting components are arranged at two ends of the test piece and can axially move along the test piece base; the lateral sealing assembly comprises a first air bag which is arranged on the inner wall of the pile casing and is used for wrapping the peripheral side of the middle upper part of the test piece, and a second air bag which is arranged on the inner wall of the test piece base and is used for wrapping the peripheral side of the bottom of the test piece. Self-adaptive height adjustment of the test piece within a certain working range is allowed, it is ensured that no relative displacement exists between the top of the test piece and the top of the demolding pile casing device up and down, and extrusion damage to an air bag of a lateral sealing assembly is avoided; meanwhile, the bag body is divided into an upper part and a lower part which are respectively used for wrapping the middle upper part and the bottom of the test piece, so that the problem of mold clamping of the test piece is solved while complete sealing of the concrete test piece is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete impermeability detection, and specifically relates to a concrete specimen sealing device for an impermeability tester and an intelligent impermeability tester. Background Art

[0002] The impermeability performance of concrete is an important index for evaluating the quality and durability of concrete. Usually, a concrete impermeability tester is used to detect the impermeability performance of concrete. The existing intelligent impermeability testers have relatively high requirements for the size and shape accuracy of concrete specimens. When the concrete test blocks for impermeability tests are processed on the construction site, due to human operation, mold deformation, etc., the size and shape of the concrete test blocks cannot fully meet the specification standards, which will cause specimens with large height errors to be difficult to be placed in the sealing cylinder of the impermeability tester; moreover, the test block sealing method adopts a fully wrapped rubber bladder type, which makes the contact area between the rubber bladder and the test block large, and the friction force increases accordingly. Coupled with factors such as irregular test blocks, the suction force of water, and the residual pressure of the rubber bladder gas after pressure relief in the enhanced air pressure type, it is very easy for the test block to get stuck in the rubber bladder and cannot be demolded by its own weight (i.e., the mold clamping phenomenon), and it is necessary to manually adjust the position of the test block or remove the test block by disassembling the rubber bladder cylinder device, which is rather troublesome, time-consuming, and cannot achieve automatic loading and unloading. Summary of the Utility Model

[0003] The utility model provides a concrete specimen sealing device for an impermeability tester and an intelligent impermeability tester including the specimen sealing device, which can allow the specimen to adaptively adjust its height within a certain working range, and solve the problem of specimen mold clamping while ensuring the complete sealing of the specimen.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A concrete specimen sealing device for an impermeability tester includes a specimen base, and further includes:

[0006] A cylinder, the cylinder is coaxially arranged with the specimen base and is located outside the specimen;

[0007] An axial limiting component, the axial limiting component is arranged at both ends of the specimen and can move axially along the specimen base; and

[0008] A lateral sealing component, the lateral sealing component includes a first airbag arranged on the inner wall of the cylinder for wrapping the middle and upper part of the specimen circumferentially and a second airbag arranged on the inner wall of the specimen base for wrapping the bottom part of the specimen circumferentially.

[0009] Preferably, the axial limiting component includes a support seat arranged between the specimen base and the bottom of the specimen and a limiting plate arranged at the top of the specimen.

[0010] Preferably, a limiting groove matching with the supporting seat is provided at the inner bottom of the specimen base.

[0011] Preferably, a limiting pressure plate is connected to the concave surface of the supporting seat through a limiting column, and a base spring is further provided between the concave surface of the supporting seat and the specimen base.

[0012] Preferably, a limiting plate spring is provided between the limiting plate and the top of the specimen.

[0013] Preferably, an installation step is formed on the inner wall of the specimen base, a flange is formed by the bottom of the casing extending inward, and a wrapping portion extends circumferentially at the bottom of the limiting plate.

[0014] Preferably, the first airbag is installed in the space formed by the flange, the inner wall of the casing and the wrapping portion, and the second airbag is installed in the space formed by the installation step, the inner wall of the specimen base and the flange.

[0015] Preferably, air pipes extending to the outside are provided on both the first airbag and the second airbag.

[0016] Preferably, a pressurized water pipe for injecting water into the specimen base is further provided on the specimen base.

[0017] An intelligent impermeability tester includes the concrete specimen sealing device described above.

[0018] It can be seen from the above technical solutions that the present utility model has the following beneficial effects:

[0019] 1. In the present utility model, the supporting seat adopts a spring structure, and by using the self-reaction force balance mechanism, the specimen is allowed to adaptively adjust its height within a certain working range, ensuring that there is no relative displacement between the top of the test block and the top of the demouldable casing device up and down, and avoiding extrusion damage to the airbag of the lateral sealing assembly; in the present utility model, the airbag body is divided into upper and lower parts, which are respectively used to wrap the middle and upper parts and the bottom of the specimen, while ensuring the complete sealing of the concrete specimen, solving the problem of specimen jamming in the mold.

[0020] 2. In the present utility model, a limiting plate spring in contact with the top of the specimen is installed on the limiting plate, so that when demoulding, the limiting plate spring generates a reaction thrust on the specimen to facilitate the demoulding process.

[0021] 3. In the present utility model, the first airbag is installed in the space formed by the flange, the inner wall of the casing, and the wrapping part, and the second airbag is installed in the space formed by the installation step, the inner wall of the specimen base, and the flange. In this way, the first airbag and the second airbag can be respectively installed in the corresponding positions to use the first airbag to wrap the middle and upper parts of the specimen, preventing water from flowing out of the side wall of the specimen during the test and affecting the test results; using the second airbag to wrap the bottom of the specimen to ensure that the wrapping length of the specimen meets the specification requirements and prevent the pressurized water at the bottom from flowing out of the gap of the specimen base. At the same time, due to the concave structure of the second airbag, the airbag body sinks inward after pressure relief, and the airbag body is separated from the side wall of the bottom of the specimen, further avoiding the phenomenon of mold jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a sectional view of the present utility model;

[0023] Figure 2 is a three-dimensional view of the present utility model;

[0024] Figure 3 is a schematic structural view of the second airbag;

[0025] Figure 4 is a schematic structural view of the casing;

[0026] Figure 5 is a schematic structural view of the limiting plate;

[0027] Figure 6 is a schematic view of the inner side structure of the limiting plate;

[0028] Figure 7 is a schematic structural view of the support seat;

[0029] Figure 8 is a schematic view of the inner side structure of the support seat;

[0030] Figure 9 is a schematic structural view of the first airbag;

[0031] Figure 10 is a schematic view of the inner side structure of the specimen base.

[0032] In the figure: 10, specimen base; 110, limiting groove; 120, installation step; 130, pressurized water pipe; 20, casing; 210, flange; 310, support seat; 311, limiting column; 320, limiting plate; 321, wrapping part; 330, limiting pressure plate; 340, base spring; 350, limiting plate spring; 410, first airbag; 420, second airbag; 430, air pipe; 50, specimen. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] The following is a detailed description of a preferred embodiment of the present utility model with reference to the accompanying drawings.

[0034] To achieve the above object, the embodiments of the present utility model adopt the following technical solutions: Referring to Figure 1 , Figure 2 , Figure 4 , Figure 9 , a concrete specimen sealing device for an impermeability tester, including a specimen base 10, and further including a protection cylinder 20, an axial limiting component and a lateral sealing component. When in use, the specimen 50 is arranged in the inner cavity of the specimen base. Specifically, the protection cylinder is coaxially arranged with the specimen base 10, and the protection cylinder is located outside the specimen. The axial limiting component is arranged at both ends of the specimen, and the axial limiting component can move along the axial direction of the specimen base 10. The lateral sealing component includes a first airbag 410 and a second airbag 420. Both the first airbag and the second airbag are annularly sleeved around the periphery of the specimen. Further, the first airbag 410 is arranged on the inner wall of the protection cylinder 20 and is used to wrap the circumferential position of the middle and upper parts of the specimen, and the second airbag 420 is arranged on the inner wall of the specimen base 10 and is used to wrap the circumferential position of the bottom of the specimen. When working, the specimen base is elastically arranged and can move along the axial direction of the specimen base, so that the specimen can be adaptively adjusted in height within the working range of 145 - 155 mm, ensuring that there is no relative position between the top of the specimen and the top of the protection cylinder up and down, and avoiding extrusion damage to the lateral sealing component. At the same time, the lateral sealing component adopts a double-airbag structure, dividing the traditional airbag into upper and lower parts, ensuring the complete sealing of the concrete specimen while solving the problem of specimen jamming in the mold.

[0035] Referring to Figure 3 , it should be noted that the inner and outer sides of the second airbag 420 in this embodiment are provided with concave surfaces, so that after pressure relief, the airbag body of the second airbag is recessed inward, and the airbag body is separated from the side wall of the bottom of the specimen, avoiding the phenomenon of jamming in the mold.

[0036] Further referring to Figure 5 , Figure 6 , Figure 7 , Figure 8 , as a preferred technical solution of this embodiment, the axial limiting component includes a support seat 310 and a limiting plate 320. The support seat 310 is arranged between the specimen base 10 and the bottom of the specimen, and the limiting plate 320 is arranged at the top of the specimen. When in use, the support seat is arranged on the bottom wall of the base, and the top of the support seat is in contact with the bottom of the specimen. The limiting plate is arranged at the top of the inner cavity of the protection cylinder, and the bottom of the limiting plate is in contact with the top of the specimen. In this way, the specimen is limited from both ends by the support seat and the limiting plate. At the same time, since both the support seat and the limiting plate can make a small range of displacement along the axial direction of the specimen base, the specimen can be adaptively adjusted in height within a certain working range.

[0037] Further, referring to Figure 8, one side of the support base 310 is provided with a concave surface, and a sunk groove is provided in the concave surface. At the same time, in order to achieve the stable installation of the support base and the specimen base, a limiting groove 110 matching the support base 310 is provided at the inner bottom of the specimen base 10. The limiting groove is specifically an annular groove. During actual use, the support base is clamped in the limiting groove.

[0038] Further, referring to Figure 8 , Figure 10 , in order to obtain the self-adjusting displacement effect of the support base 310, a limiting pressure plate 330 is connected to the concave surface of the support base 310 through a limiting column 311, and a base spring 340 is provided between the concave surface of the support base 310 and the specimen base. It should be noted that the number of the limiting columns 311 and the base springs 340 can both be set to multiple and are evenly distributed along the side wall of the support base 310. During use, the limiting pressure plate contacts the bottom wall of the specimen base, and at the same time, the base spring is in flexible contact with the bottom wall of the specimen base. In this way, the spring structure composed of the limiting pressure plate and the base spring forms a self-reaction force balance mechanism, allowing the specimen to adaptively adjust its height within the working range of 145 - 155 mm.

[0039] In addition, a limiting plate spring 350 is provided between the limiting plate 320 and the top of the specimen. Similarly, the number of the limiting plate springs is also multiple. In this way, when the specimen is demolded, the limiting plate spring will generate a reaction thrust on the specimen, which helps the specimen to be demolded.

[0040] Referring to Figure 1 , as a preferred technical solution of this embodiment, in order to facilitate the installation of the first airbag 410 and the second airbag 420, an installation step 120 is formed on the inner wall of the specimen base 10. The bottom of the casing 20 extends inward to form a flange 210. A wrapping portion 321 extends circumferentially at the bottom of the limiting plate 320. During use, the first airbag 410 is installed in the space formed by the flange 210, the inner wall of the casing 20, and the wrapping portion 321. The second airbag 420 is installed in the space formed by the installation step 120, the inner wall of the specimen base 10, and the flange 210. In this way, the first airbag can be limited to the circumferential position in the upper middle part of the specimen, and the second airbag can be limited to the circumferential position at the bottom of the specimen, so as to achieve the complete sealing of the specimen.

[0041] It should be noted that the traditional airbag is an integrated type, and the height of the airbag is greater than the test piece. The airbag wraps the test piece and the test piece base together, so that the bottom and sides of the test piece are sealed together. In this way, the test piece can be completely wrapped after the airbag is pressurized. Since the bottom surface of the test piece is higher than the bottom surface of the airbag, this results in the airbag rising with the casing after pressure relief, and the part of the airbag below the bottom surface of the test piece often cannot completely recover its deformation. In addition, due to factors such as the irregularity of the test piece, the suction force of water, and the excess pressure of the gas pressure relief of the enhanced pneumatic rubber bag, the test piece cannot fall off freely under the action of gravity, and the test piece is still wrapped in the airbag, that is, the mold jamming phenomenon occurs, and manual intervention is required for demolding;

[0042] Compared with the traditional fully wrapped airbag, this solution divides the airbag into two upper and lower airbags. The first airbag is installed on the inner side of the casing and is shorter than the specimen. It is used to wrap the middle and upper part of the specimen to prevent water from flowing out from the side wall of the specimen during the test and affecting the test results. After the first airbag is depressurized, since the first airbag does not completely wrap the specimen, the specimen can freely escape from the casing under the action of its own weight during the rising process of the casing to avoid mold jamming; the second airbag is installed at the specimen base to wrap the bottom of the specimen to ensure that the specimen wrapping length meets the specification requirements and prevent the pressurized water at the bottom from flowing out from the gap in the specimen base. Due to the concave structure of the second airbag, the airbag body sinks inward after depressurization, and the airbag body is separated from the bottom side wall of the specimen to further avoid mold jamming.

[0043] Further, see Figure 2 The first airbag 410 and the second airbag 420 are both provided with an air pipe 430 extending to the outside. Specifically, with respect to the first airbag, the air pipe thereon extends outward through the protective tube and can be connected to an external air source; similarly, with respect to the second airbag, the air pipe thereon extends outward through the specimen base and can be connected to an external air source.

[0044] Furthermore, the specimen base 10 is also provided with a pressurized water pipe 130 for injecting water into the interior thereof. When in use, the pressurized water pipe injects water of a specified pressure into the specimen base for testing. When water overflows from the exhaust pipe through the pressurized water pipe, it indicates that the air in the base is completely discharged.

[0045] This embodiment also provides an intelligent water-resistance tester, which includes the aforementioned concrete specimen sealing device. By applying the aforementioned concrete specimen sealing device to perform concrete water-resistance detection tests, the specimen can be allowed to adaptively adjust its height within a certain working range, thereby ensuring that the specimen is completely sealed and solving the problem of specimen jamming.

[0046] In use, the casing 20 is installed on the top plate of the lifting plate of the impermeability tester, the specimen base 10 is installed on the bottom plate of the lifting plate of the impermeability tester, the concrete specimen 50 is placed on the support seat 310. The impermeability tester layer plate rises, and the test layer is opened. The staff places the concrete block to be tested on the corresponding layer. The impermeability tester layer plate descends to the designated position. Taking the sealed air pressure set in the test as the target air pressure, the internal pressure of the first airbag 410 is increased to the target air pressure value through the first airbag air pipe. The impermeability tester water pump switch is turned on, and water is injected into the specimen base 10 through the pressurized water pipe 130. When the overflow pipe detects the outflow of water, the air inside the specimen base 10 is completely discharged. The impermeability tester layer plate descends to the bottom position. Taking the sealed air pressure set in the test as the target air pressure, the internal pressure of the second airbag 420 is increased to the target air pressure value through the second airbag air pipe. Through the control valve, the first airbag and the second airbag are connected to make them in an equal-pressure state. At this time, the sealing is completed, and then the test begins. The pressurized water pipe 130 increases the bottom water pressure to the test target value. After the test is completed, the water pressure, as well as the air pressure of the first airbag 410 and the second airbag 420, is removed. The impermeability tester layer plate rises, the test layer is opened, and the staff takes out the concrete specimen after the test.

[0047] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A concrete specimen sealing device for a permeability tester, comprising a specimen base (10), characterized in that: Also includes: A protective tube (20), which is coaxially arranged with the specimen base (10) and is located outside the specimen; An axial limit assembly, which is arranged at both ends of the specimen and is capable of axially moving along the specimen base (10); and A lateral sealing assembly comprises a first air bag (410) arranged on the inner wall of a protective sleeve (20) for wrapping the circumference of the upper middle part of a specimen, and a second air bag (420) arranged on the inner wall of a specimen base (10) for wrapping the circumference of the bottom of the specimen.

2. The concrete specimen sealing device for a permeability tester according to claim 1, characterized in that: The axial limiting assembly comprises a support seat (310) arranged between the specimen base (10) and the bottom of the specimen, and a limiting plate (320) arranged on the top of the specimen.

3. The concrete specimen sealing device for the impermeability tester according to claim 2, characterized in that: The inner bottom of the specimen base (10) is provided with a limiting groove (110) matching the support seat (310).

4. The concrete specimen sealing device for a permeability tester according to claim 2, characterized in that: The inner concave surface of the support seat (310) is connected to the limiting pressure plate (330) via a limiting column (311), and a base spring (340) is also provided between the inner concave surface of the support seat (310) and the test piece base.

5. The concrete specimen sealing device for a permeability tester according to claim 4, characterized in that: A limiting plate spring (350) is provided between the limiting plate (320) and the top of the test piece.

6. The concrete specimen sealing device for a permeability tester according to claim 2, characterized in that: The inner wall of the specimen base (10) is formed with a mounting step (120), the bottom of the casing (20) extends inwardly to form a flange (210), and the bottom of the limiting plate (320) is circumferentially extended with a wrapping portion (321).

7. The concrete specimen sealing device for a permeability tester according to claim 6, characterized in that: The first airbag (410) is installed in a space formed by the flange (210), the inner wall of the protective tube (20) and the wrapping portion (321), and the second airbag (420) is installed in a space formed by the installation step (120), the inner wall of the specimen base (10) and the flange (210).

8. The concrete specimen sealing device for a permeability tester according to claim 7, characterized in that: The first airbag (410) and the second airbag (420) are both provided with an air tube (430) extending to the outside.

9. The concrete specimen sealing device for a permeability tester according to claim 1, characterized in that: The test piece base (10) is also provided with a pressurized water pipe (130) for injecting water into the interior thereof.

10. An intelligent anti-seepage tester, characterized in that: The concrete specimen sealing device comprises the concrete specimen sealing device according to any one of claims 1 to 9.

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