Mortar impermeability test device convenient to seal

Abstract

The utility model discloses a mortar impermeability test device convenient to seal, and belongs to the technical field of impermeability test equipment. The device comprises an anti-seepage mold, the anti-seepage mold is provided with a mold cavity used for containing a mortar test piece, a plurality of sealing rubber sleeves are arranged in the mold cavity, the section of each sealing rubber sleeve is D-shaped, the arc part of each sealing rubber sleeve is embedded in the inner surface of the mold cavity, each sealing rubber sleeve is provided with an air nozzle, the inner wall of the anti-seepage mold is provided with a hole channel, and the air nozzles are connected with an air source through the hole channels. According to the impermeability test device disclosed by the utility model, after the mortar test piece is pressed into the mold cavity, the sealing rubber sleeve is inflated to expand, so that a gap between the mortar test piece and the mold cavity can be well filled; besides, in the process of pressing in and pressing out the mortar test piece, the sealing rubber sleeve is completely embedded into the inner wall of the mold, friction with the mortar test piece can be avoided, on one hand, pressing in and pressing out of the mortar test piece are facilitated, taking and placing of the test piece are convenient, meanwhile, damage to the sealing rubber sleeve can be avoided, and the service life of the sealing rubber sleeve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-seepage test equipment, and particularly relates to a mortar anti-seepage test device which is convenient for sealing. Background Art

[0002] The anti-seepage performance of waterproof mortar or other waterproof materials is one of the key performance indicators to characterize their waterproof effects. In the fields of water conservancy and hydropower, construction, transportation and other engineering construction, before waterproof materials such as repair mortar and epoxy grouting materials are put into use, it is necessary to use a mortar anti-seepage instrument to test their anti-seepage performance. In the current mortar anti-seepage test, the formed frustum-shaped specimen is pressed into the anti-seepage mold cavity and then the pressure water penetration test is carried out, and a sealing material (such as paraffin, rosin, etc.) or sealant needs to be applied between the specimen and the inner surface of the mold cavity for sealing; however, applying the sealing material requires high technical skills for the operators, and moreover, after the test, it is necessary to remove the sealing material on the inner surface of the mold cavity, which is not only cumbersome in operation, but also the situation of water leakage occurs frequently between the gap of the specimen and the inner surface of the mold cavity after sealing, and the sealing success rate is difficult to guarantee.

[0003] In order to solve the above technical problems, some researchers have proposed a method of embedding a silicone rubber material collar on the inner surface of the mold cavity, which improves the sealing performance of the mold cavity after the mortar specimen is placed in the mold cavity, and at the same time, there is no need to apply sealant. However, during the process of pressing the mortar specimen in and out, due to the contact friction force between the mortar specimen and the collar, the operation is inconvenient, and the collar is easily damaged after being extruded many times, with a short service life. More importantly, the sealing effect of the collar is not ideal. Summary of the Invention

[0004] Aiming at the above deficiencies of the prior art, the utility model provides a mortar anti-seepage test device which is convenient for sealing. The device is convenient for pressing the mortar specimen in and out, and at the same time, an ideal sealing effect can be achieved.

[0005] To achieve the above purpose, it is specifically realized through the following technologies:

[0006] A mortar anti-seepage test device which is convenient for sealing, including an anti-seepage mold. The anti-seepage mold is provided with a mold cavity for placing a mortar specimen. A plurality of sealing rubber sleeves are arranged in the mold cavity. The cross-section of the sealing rubber sleeve is in a "D" shape. The arc part of the sealing rubber sleeve is embedded in the inner surface of the mold cavity. An air nozzle is arranged on the sealing rubber sleeve. A hole channel is arranged on the anti-seepage mold. The air nozzle is connected with a gas source through the hole channel.

[0007] The anti-seepage test device of the present utility model includes a sealing rubber sleeve embedded in the inner surface of the mold cavity. The cross-section of the sealing rubber sleeve is in a "D" shape, with its arc part embedded in the inner surface of the mold cavity and the straight-line part fitting against the mortar specimen. After the mortar specimen is pressed into the mold cavity, air is inflated into the sealing rubber sleeve through an air source and an air nozzle. The sealing rubber sleeve expands and tightly fills the gap between the mortar specimen and the mold cavity, achieving a good sealing effect without the need to apply sealing materials or adhesives on the surface of the specimen, thus improving the test operation efficiency.

[0008] For the anti-seepage test device of the present utility model, after the mortar specimen is pressed into the mold cavity, the sealing rubber sleeve is inflated to make it expand, which can well fill the gap between the mortar specimen and the mold cavity. In addition, during the process of pressing the mortar specimen into and out of the mold, the sealing rubber sleeve is completely embedded in the inner wall of the mold, which can avoid friction with the mortar specimen. On the one hand, it is convenient to press the mortar specimen into and out of the mold and to take and place the specimen. On the other hand, it can avoid damage to the sealing rubber sleeve and extend its service life.

[0009] Furthermore, an annular groove is provided on the inner surface of the mold cavity, and the arc part of the sealing rubber sleeve is embedded in the annular groove. By embedding the arc part of the sealing rubber sleeve in the annular groove, the fixation of the sealing rubber sleeve on the mold can be realized.

[0010] Furthermore, the hole communicates the annular groove with the outside. The air nozzle of the sealing rubber sleeve can be connected to an external air source through this hole.

[0011] Furthermore, the number of the sealing rubber sleeves is greater than or equal to 2, and several sealing rubber sleeves are distributed along the depth direction of the mold cavity. Further, the lowermost sealing rubber sleeve is flush with the bottom of the mold. By providing more than two sealing rubber sleeves and making the lowermost sealing rubber sleeve flush with the bottom of the mold cavity, a good sealing effect can be achieved.

[0012] Furthermore, the material of the sealing rubber sleeve is silicone rubber or ethylene propylene diene monomer rubber. The silicone rubber or ethylene propylene diene monomer rubber material has good expansibility and sealing performance, and is convenient for installation while inflating and expanding. In addition, the silicone rubber or ethylene propylene diene monomer rubber material also has good wear resistance, corrosion resistance, water resistance and other characteristics, with high durability.

[0013] Furthermore, the air source is an inflation device, and the inflation device is connected to the air nozzle through an air pipe.

[0014] Furthermore, the working pressure of the inflation device is not less than 2.0 MPa. By setting an appropriate inflation pressure, a good sealing effect can be achieved.

[0015] Furthermore, the air nozzle is arranged obliquely upward.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The anti-seepage test device of the present utility model includes a sealing rubber sleeve embedded in the inner surface of the mold cavity. The cross-section of the sealing rubber sleeve is in the shape of a "D". Its arc part is embedded in the inner surface of the mold cavity, and the straight-line part is attached to the mortar specimen. After the mortar specimen is pressed into the mold cavity, air is inflated into the sealing rubber sleeve through an air source and an air nozzle. The sealing rubber sleeve expands and tightly fills the gap between the mortar specimen and the mold cavity, achieving a good sealing effect. There is no need to apply sealing materials or adhesives on the surface of the specimen, improving the test operation efficiency.

[0018] In the anti-seepage test device of the present utility model, during the process of pressing the mortar specimen in and out, the sealing rubber sleeve is completely embedded in the inner wall of the mold, which can avoid friction with the mortar specimen. On the one hand, it is convenient to press the mortar specimen in and out, and it is convenient to take and place the specimen. On the other hand, it can avoid damage to the sealing rubber sleeve and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic cross-sectional view of the mold cavity of the anti-seepage device of the present utility model;

[0020] Figure 2 is a schematic cross-sectional view of the sealing rubber sleeve of the anti-seepage device of the present utility model;

[0021] Figure 3 is a schematic overall structure view of the anti-seepage device of the present utility model.

[0022] Wherein: 1. Anti-seepage mold; 2. Mold cavity; 3. Annular groove; 301. Bottom annular groove; 302. Middle annular groove; 4. First sealing rubber sleeve; 5. Second sealing rubber sleeve; 6. Air nozzle; 7. Conduit; 8. Inflating device; 9. Air pipe; 10. Groove; 11. External thread; 12. Anti-seepage mold base. SPECIFIC EMBODIMENTS

[0023] The technical solutions of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] The present utility model will be further described below in conjunction with specific embodiments, but it is not limited to the present utility model.

[0026] As Figures 1 to 3 shown, this embodiment provides a mortar impermeability test device that is convenient for sealing, including an impermeability mold 1. A mold cavity 2 for placing mortar specimens is provided inside the impermeability mold 1. The mold cavity 2 is in the shape of a frustum of a cone with an upper mouth diameter of 70 mm, a lower mouth diameter of 80 mm, and a height of 30 mm. An inwardly recessed annular groove 3 is provided on the inner wall of the mold cavity 2. There are two groups of annular grooves 3. Among them, the lower end of the bottom annular groove 301 is flush with the lower mouth of the inner wall of the mold cavity 2, and the vertical height from the lower end of the middle annular groove 302 to the upper mouth of the inner wall of the mold cavity 2 is 15 mm. A first sealing rubber sleeve 4 is embedded in the bottom annular groove 301, and a second sealing rubber sleeve 5 is embedded in the middle annular groove 302. The cross-sections of the first sealing rubber sleeve 4 and the second sealing rubber sleeve 5 are both in the shape of a "D". The first sealing rubber sleeve 4 and the second sealing rubber sleeve 5 are respectively fixed on the mold by embedding them in the annular groove 3 by means of their arc parts, realizing the fixation of the sealing rubber sleeve on the mold. An air nozzle 6 is provided on both the first sealing rubber sleeve 4 and the second sealing rubber sleeve 5. A hole 7 for the air nozzle 6 to pass through is provided on the inner wall of the impermeability mold 1. The air nozzle 6 passes through the hole 7 and is connected to an external air source.

[0027] In some embodiments, the first sealing rubber sleeve 4 is in the shape of a circular ring structure with an inner diameter of 80 mm and an outer diameter not greater than 84 mm. The cross-section of the circular ring structure is in the shape of a "D", and the longitudinal height does not exceed 4 mm. The air nozzle 6 is provided on the arc part of the first sealing rubber sleeve 4. The second sealing rubber sleeve 5 is in the shape of a circular ring structure with an inner diameter of 75 mm and an outer diameter not greater than 79 mm. The cross-section of the circular ring structure is also in the shape of a "D", and the longitudinal height does not exceed 4 mm. The air nozzle 6 is also provided on the arc part of the second sealing rubber sleeve 5.

[0028] In some embodiments, there are three groups of annular grooves 3, which are respectively located at the lower, middle, and upper ends of the inner wall of the mold cavity 2. Correspondingly, there are also three groups of sealing rubber sleeves, which are respectively fixed in the annular grooves by means of their arc parts.

[0029] In some embodiments, the materials of the first sealing rubber sleeve 4 and the second sealing rubber sleeve 5 are both silicone rubber or ethylene propylene diene monomer (EPDM) rubber. Silicone rubber or EPDM rubber materials have good expansibility and sealing performance, can expand under pressure, and automatically expand to form a tight sealing effect after inflation. At the same time, they are easy to install and have strong adaptability.

[0030] In some embodiments, the gas source is an inflation device 8. The inflation device 8 is provided with a plurality of air pipes 9. The inflation device 8 is connected to the air nozzle 6 of the sealing rubber sleeve through the air pipe 9, and the sealing rubber sleeve is inflated through the inflation device 8.

[0031] In some embodiments, the working pressure of the inflation device 8 is not less than 2.0 MPa. By setting an appropriate inflation pressure, a good sealing effect can be achieved.

[0032] In some embodiments, the channels 7 on the inner wall of the impermeability mold 1 are arranged obliquely upward, connecting the annular groove 3 with the outside of the mold.

[0033] In some embodiments, the outer contour of the impermeability mold 1 is cylindrical. Four grooves 10 are evenly arranged at the upper end, and an external thread 11 is arranged at the lower end, which can be adaptively installed in the impermeability mold base 12 of the existing mortar impermeability tester.

[0034] The working process of the mortar impermeability test device with convenient sealing of the present utility model is as follows: First, the second sealing rubber sleeve 5 is installed in the middle annular groove 302, and the first sealing rubber sleeve 4 is installed in the bottom annular groove 301. When installing, the air nozzle 6 needs to pass through the channel on the inner wall of the mold cavity. Then, the mortar specimen is placed into the mold cavity 2, and the mortar specimen is pressed into the mold cavity 2 on the press until it is flush. Then, the impermeability mold 1 is installed on the impermeability mold base 12 of the mortar impermeability tester, and the external thread 11 is rotated and tightened; then, the air pipe 9 of the inflation device 8 is connected to the air nozzle 6, the inflation device 8 is started, and its working pressure is set to be not less than 2.0 MPa, and then the impermeability test can be carried out. At this time, under the action of the higher internal gas pressure, the first sealing rubber sleeve 4 and the second sealing rubber sleeve 5 expand, tightly sealing the gap between the inner wall of the mold cavity 2 and the mortar specimen, greatly increasing the resistance to water seepage upward through the edge, thereby ensuring the smooth progress of the impermeability performance test and the validity of the data.

[0035] The impermeability test device of the present utility model does not need to apply a sealing material or adhesive on the surface of the specimen, improving the test operation efficiency. After the mortar specimen is pressed into the mold cavity 2, the sealing rubber sleeve is inflated to expand, which can well fill the gap between the mortar specimen and the mold cavity 2; in addition, during the process of pressing the mortar specimen in and out, the sealing rubber sleeve is completely embedded in the inner wall of the mold, which can avoid friction with the mortar specimen. On the one hand, it is convenient to press the mortar specimen in and out, and it is convenient to take and place the specimen. On the other hand, it can avoid damage to the sealing rubber sleeve and extend its service life.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mortar impermeability test device facilitating sealing, comprising an impermeability mold, wherein the impermeability mold is provided with a mold cavity for placing mortar specimens, and is characterized in that, A plurality of sealing rubber sleeves are arranged in the mold cavity, the cross section of the sealing rubber sleeves is in a "D" shape, the arc portion of the sealing rubber sleeves is embedded in the inner surface of the mold cavity, an air nozzle is arranged on the sealing rubber sleeve, a channel is arranged on the inner wall of the anti-seepage mold, and the air nozzle is connected to the air source through the channel.

2. The mortar impermeability test device convenient for sealing according to claim 1, wherein An annular groove is provided on the inner surface of the mold cavity, and the arc portion of the sealing rubber sleeve is embedded in the annular groove.

3. The mortar impermeability test device facilitating sealing according to claim 2, wherein, The hole communicates the annular groove with the outside.

4. A mortar impermeability test device facilitating sealing according to claim 1, characterized in that, The number of the sealing rubber sleeves is greater than or equal to 2, and the plurality of sealing rubber sleeves are distributed along the depth direction of the mold cavity.

5. The mortar impermeability test device facilitating sealing according to claim 4, wherein The sealing rubber sleeve at the lower end is flush with the bottom of the mold.

6. The mortar impermeability test device convenient for sealing according to claim 1, wherein, The material of the sealing rubber sleeve is silicone rubber or EPDM rubber.

7. A mortar impermeability test device facilitating sealing according to claim 1, characterized in that, The gas source is an inflator, and the inflator is connected to the gas nozzle through an air pipe.

8. The mortar impermeability test device convenient for sealing according to claim 7, characterized in that, The working pressure of the inflation device is not less than 2.0 MPa.

9. The mortar impermeability test device convenient for sealing according to claim 1, characterized in that, The air nozzle is arranged obliquely upward.

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