A sealing structure of a concrete impermeability detector

Abstract

The application discloses a sealing structure of a concrete impermeability detector and relates to the field of concrete tests, which comprises a sealing strip one, a sealing strip two is fixed in the sealing strip one, a wear-resistant protective layer is fixed on the surface of the sealing strip one, the sealing strip one is a hard rubber strip, the sealing strip two is a soft rubber strip, and a plurality of sealing grooves are formed in the outer ring of the sealing strip one. The elastic sealing strip one and the sealing strip two are closely attached to the concrete test block, then the concrete test block is inserted into the impermeability detector detection space, the sealing strip one and the sealing strip two are further deformed under extrusion, and the gaps between the concrete test sample and the detection space are filled, so that the gaps between the impermeability detector detection space and the concrete test block can be sealed conveniently and quickly, and the sealing strip one and the sealing strip two with different textures are combined, and the sealing property and the durability are considered simultaneously.

Description

Technical Field

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

[0002] Concrete impermeability testing is one of the important means of evaluating concrete durability. Currently, it is mainly tested using a permeability meter. During the testing process, the sealing effect of the sample directly affects the accuracy of the test results. Traditional sealing methods mostly use physical or chemical means to form a sealing layer on the sample surface.

[0003] The common methods for sealing concrete samples include the following: First, the paraffin coating method, which involves applying molten paraffin to the outer surface of the sample and allowing it to cool and solidify to form a sealing layer; second, the epoxy resin coating method, which involves applying epoxy resin and allowing it to cure to form a sealing layer; and third, the mechanical clamping method, which uses clamps and sealing gaskets to seal the sample.

[0004] In existing technologies, the paraffin coating method is cumbersome to operate and has a long curing time. When the paraffin cannot be fully adapted to the space of the permeability tester, it is difficult to insert the concrete sample into the equipment. The epoxy resin coating method is costly and greatly affected by environmental factors. The mechanical clamping method has high requirements for the size accuracy of the sample and is difficult to adapt to the sealing requirements of samples of different sizes, making it difficult to seal the gap between the concrete test block and the space of the permeability tester. Utility Model Content

[0005] The purpose of this application is to solve the problem of sealing the gap between the concrete test block and the permeability tester mentioned in the background art. This application provides a sealing structure for a concrete permeability tester.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A sealing structure for a concrete permeability testing instrument includes a first sealing strip, a second sealing strip fixed inside the first sealing strip, a wear-resistant protective layer fixed on the surface of the first sealing strip, the first sealing strip being a hard rubber strip, the second sealing strip being a soft rubber strip, and a plurality of sealing grooves being formed on the outer ring of the first sealing strip.

[0008] By adopting the above technical solution, the elasticity of sealing strip one and sealing strip two is used to tightly adhere to the concrete test block. Then, the concrete test block is inserted into the testing space of the permeability meter. Sealing strip one and sealing strip two are further deformed by compression, filling the gap between the concrete sample and the testing space. This allows for convenient and quick sealing of the gap between the testing space of the permeability meter and the concrete test block. At the same time, sealing strip one and sealing strip two of different materials are combined to balance sealing and durability.

[0009] Furthermore, the sealing strip is a hard natural rubber strip.

[0010] By adopting the above technical solution, the hard natural rubber has a low hardness after vulcanization, thus providing good sealing performance and good adaptability to temperature changes and impact vibration.

[0011] Furthermore, the second sealing strip is a natural rubber strip.

[0012] By adopting the above technical solution, natural rubber has a low hardness after vulcanization, thus providing good sealing performance and exhibiting good elasticity, wear resistance, and tear resistance.

[0013] Furthermore, the wear-resistant protective layer is a nitride ceramic film.

[0014] By adopting the above technical solution, the wear-resistant protective layer is a nitride ceramic film, which can significantly improve the wear resistance and corrosion resistance of the sealing structure.

[0015] Furthermore, the inner ring of the sealing strip has a plurality of anti-slip patterns, which are evenly distributed.

[0016] By adopting the above technical solution, the anti-slip texture on the sealing strip is made to contact the surface of the concrete test block, thereby enhancing the friction and sealing performance with the permeability tester's detection space.

[0017] Furthermore, the sealing groove is a U-shaped groove, and several sealing grooves are evenly distributed.

[0018] By adopting the above technical solution, the U-shaped groove deforms when it comes into contact with the edge of the permeability tester's detection space, thereby providing a better sealing effect.

[0019] Furthermore, the sealing groove has a depth of 3mm, a groove spacing of 1mm, a chamfer of 0.3mm, and a pre-compression amount of 0.7mm.

[0020] By adopting the above technical solution, the depth, spacing, chamfer, and compression of the sealing groove are limited, thereby further improving the sealing effect.

[0021] Furthermore, both the upper and lower surfaces of the sealing strip are provided with inclined surfaces, which are inclined away from the inner ring of the sealing strip.

[0022] By adopting the above technical solution, the edge of the space first comes into contact with the inclined surface, and the inclined surface of the space squeezes the sealing strip one along the inclined surface, so that the sealing strip composed of sealing strip one and sealing strip two can be better inserted into the gap between the concrete test block and the space of the permeability tester.

[0023] In summary, this application includes at least one of the following beneficial effects;

[0024] 1. This application utilizes a natural rubber strip as a second sealing strip and a hard natural rubber strip as a first sealing strip. The first sealing strip wraps around the second sealing strip to form a sealing strip. Uniformly distributed anti-slip textures are then created on the inner ring of the first sealing strip, and uniformly distributed U-shaped grooves are created on its outer ring. A wear-resistant protective layer is fixed to the surface of the first rubber strip. The inner diameter of the first sealing strip is slightly smaller than the outer diameter of the concrete sample, and the outer diameter is slightly larger than the aperture of the permeability tester's detection space. The annular sealing strip, composed of the first and second sealing strips, is placed over the concrete sample. The concrete sample is then inserted into the permeability tester's detection space. The first and second sealing strips are further deformed under pressure, filling the gap between the concrete sample and the test space. This achieves convenient and quick sealing of the gap between the permeability tester's detection space and the concrete sample. Furthermore, the combination of the first and second sealing strips of different materials achieves both sealing performance and durability.

[0025] 2. In this application, by setting inclined surfaces on the upper and lower sides of the sealing strip one, when the concrete test block is inserted into the space of the permeability tester, the edge of the space first abuts against the inclined surface, allowing the inclined surface of the space to press the sealing strip one along the inclined surface, so that the sealing strip composed of sealing strip one and sealing strip two can be better inserted into the gap between the concrete test block and the space of the permeability tester. Attached Figure Description

[0026] Figure 1 This is a first three-dimensional structural schematic diagram of the sealing structure in this application;

[0027] Figure 2 This is a cross-sectional schematic diagram of the sealing structure in this application;

[0028] Figure 3 This application Figure 2 Enlarged diagram of point A in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Sealing strip one; 2. Sealing strip two; 3. Wear-resistant protective layer; 4. Sealing groove; 5. Anti-slip texture. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 —3 provides further detailed description of this application.

[0032] This application discloses a sealing structure for a concrete permeability testing instrument.

[0033] Reference Figure 1 , Figure 2 and Figure 3A sealing structure for a concrete permeability testing instrument includes a sealing strip 1, a sealing strip 2 fixed inside the sealing strip 1, a wear-resistant protective layer 3 fixed on the surface of the sealing strip 1, the sealing strip 1 being a hard rubber strip, the sealing strip 2 being a soft rubber strip, and a plurality of sealing grooves 4 being formed on the outer ring of the sealing strip 1.

[0034] When using this sealing structure, the inner diameter of sealing strip 1 is slightly smaller than the outer diameter of the concrete sample, and the outer diameter of sealing strip 1 is slightly larger than the aperture of the permeability test chamber. The annular sealing strip composed of sealing strip 1 and sealing strip 2 is fitted onto the concrete sample. The hard rubber strip of sealing strip 1 and the soft rubber strip of sealing strip 2, when fitted onto the concrete sample, balance both sealing and durability. The elasticity of sealing strip 1 and sealing strip 2 ensures a tight fit onto the concrete sample. Then, the concrete sample is inserted into the permeability test chamber. Sealing strip 1 and sealing strip 2 are further deformed under pressure, filling the gap between the concrete sample and the test chamber, thus achieving a seal. By fitting the sealing strip composed of sealing strip 1 and sealing strip 2 onto the concrete sample and then inserting it into the permeability test chamber, the gap between the permeability test chamber and the concrete sample can be sealed conveniently and quickly. Furthermore, using sealing strips 1 and 2 of different materials in combination ensures both sealing and durability.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The sealing strip 1 is a hard natural rubber strip.

[0036] In addition, sealing strip 2 is made of natural rubber.

[0037] Natural rubber, after vulcanization, has a low hardness, providing good sealing performance. It also exhibits good adaptability to temperature changes and impact vibrations, and possesses good elasticity, abrasion resistance, and tear resistance, making it suitable for use as an inner soft rubber strip. Hard natural rubber, after vulcanization, also has a low hardness, providing good sealing performance and good adaptability to temperature changes and impact vibrations, making it suitable for use as an outer hard rubber strip. By using natural rubber as sealing strip 2 and hard natural rubber as sealing strip 1, the sealing strip formed by the combination of sealing strip 1 and sealing strip 2 possesses good sealing and chemical resistance, as well as good elasticity, abrasion resistance, and tear resistance.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The wear-resistant protective layer 3 is a nitride ceramic film. Using chemical vapor deposition, the wear-resistant protective layer 3 is fixed to the surface of the rubber strip. By making the wear-resistant protective layer 3 a nitride ceramic film, the wear resistance and corrosion resistance of the sealing structure can be significantly improved.

[0039] Reference Figure 1 , Figure 2 and Figure 3 The inner ring of sealing strip 1 has several anti-slip grooves 5, which are evenly distributed. When the sealing strip composed of sealing strip 1 and sealing strip 2 is applied to the concrete test block, the anti-slip grooves 5 on sealing strip 1 are made to contact the surface of the concrete test block. By creating several anti-slip grooves 5 on sealing strip 1, the friction and sealing performance with the permeability testing space of the instrument can be enhanced.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The sealing groove 4 is a U-shaped groove, and several sealing grooves 4 are evenly distributed.

[0041] In addition, the sealing groove 4 has a groove depth of 3mm, a groove spacing of 1mm, a groove chamfer of 0.3mm, and a pre-compression amount of 0.7mm.

[0042] After the sealing strip composed of sealing strip 1 and sealing strip 2 is applied to the concrete test block, when the concrete test block is inserted into the testing space of the permeability tester, several U-shaped grooves on sealing strip 1 abut against the inner wall of the testing space. When the U-shaped grooves abut against the edge of the testing space, they deform, allowing the concrete test block to be inserted into the testing space more smoothly. By opening evenly distributed U-shaped grooves on the outer ring of sealing strip 1, the sealing performance and service life of the sealing strip composed of sealing strip 1 and sealing strip 2 can be improved.

[0043] Reference Figure 1 , Figure 2 and Figure 3 Both the upper and lower surfaces of sealing strip 1 have beveled surfaces, which slope away from the inner ring of sealing strip 1. By creating beveled surfaces on both the upper and lower surfaces of sealing strip 1, when the concrete test block is inserted into the permeability tester space, the edge of the space first contacts the beveled surfaces, allowing the beveled surfaces to press against sealing strip 1. By creating beveled surfaces on sealing strip 1, the permeability tester space presses against sealing strip 1, thus allowing the sealing strip composed of sealing strip 1 and sealing strip 2 to be better inserted into the gap between the concrete test block and the permeability tester space.

[0044] Working principle: In the production of this sealing strip, a natural rubber strip is used as sealing strip 2, and a hard natural rubber strip is used as sealing strip 1. Sealing strip 1 wraps around sealing strip 2 to form a sealing strip. Then, uniformly distributed anti-slip textures 5 are made on the inner ring of sealing strip 1, and uniformly distributed U-shaped grooves are made on the outer ring of sealing strip 1. Using chemical vapor deposition, a wear-resistant protective layer 3 is fixed to the surface of rubber strip 1. The inner diameter of sealing strip 1 is slightly smaller than the outer diameter of the concrete sample, and the outer diameter of sealing strip 1 is slightly larger than the aperture of the permeability tester. The annular sealing strip composed of sealing strip 1 and sealing strip 2 is placed on the concrete sample. Then, the concrete sample is inserted into the permeability tester. Sealing strip 1 and sealing strip 2 are further deformed by compression, filling the gap between the concrete sample and the test space.

Claims

1. A sealing structure for a concrete permeability testing instrument, comprising a sealing strip (1), characterized in that: A second sealing strip (2) is fixed inside the first sealing strip (1). A wear-resistant protective layer (3) is fixed on the surface of the first sealing strip (1). The first sealing strip (1) is a hard rubber strip, and the second sealing strip (2) is a soft rubber strip. Several sealing grooves (4) are opened on the outer ring of the first sealing strip (1).

2. The sealing structure of a concrete permeability testing instrument according to claim 1, characterized in that: The sealing strip (1) is a hard natural rubber strip.

3. The sealing structure of a concrete permeability testing instrument according to claim 2, characterized in that: The sealing strip 2 (2) is a natural rubber strip.

4. The sealing structure of a concrete permeability testing instrument according to claim 1, characterized in that: The wear-resistant protective layer (3) is a nitride ceramic film.

5. The sealing structure of a concrete permeability testing instrument according to claim 1, characterized in that: The inner ring of the sealing strip (1) has several anti-slip patterns (5), and the several anti-slip patterns (5) are evenly distributed.

6. The sealing structure of a concrete permeability testing instrument according to claim 1, characterized in that: The sealing groove (4) is a U-shaped groove, and several sealing grooves (4) are evenly distributed.

7. The sealing structure of a concrete permeability testing instrument according to claim 6, characterized in that: The sealing groove (4) has a groove depth of 3mm, a groove spacing of 1mm, a groove chamfer of 0.3mm, and a pre-compression amount of 0.7mm.

8. The sealing structure of a concrete permeability testing instrument according to claim 1, characterized in that: Both the upper and lower surfaces of the sealing strip (1) are provided with inclined surfaces, which are inclined away from the inner ring of the sealing strip (1).

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