阅读说明：本技术 一种动三轴仪用封水止水活塞 (Water sealing and water stopping piston for dynamic triaxial apparatus ) 是由 马兆勇 霍立平 张世宏 赵秀硕 彭贺龙 李丹 李海燕 张宗林 张鹏雕 于 2019-12-02 设计创作，主要内容包括：本发明的一种动三轴仪用封水止水活塞,包括：内活塞、外活塞、止水橡圈、多个封水刷和励磁线圈；所述外活塞套设在内活塞外侧,外活塞的外壁设有外螺纹槽,所述励磁线圈绕设在所述外螺纹槽内；所述内活塞的外壁设有内螺纹槽,止水橡圈的内壁设有螺纹凸起,止水橡圈套设在内活塞外壁上,并通过螺纹凸起和内螺纹槽配合贴紧内活塞,多个封水刷粘结在止水橡圈的外壁上；所述止水橡圈包括内层橡圈和外层橡圈,在内层橡圈和外层橡圈间设有磁流变弹性体；所述封水刷为片状结构,内部设有磁流变弹性体。该封水止水活塞止水效果明显,可有效耐磨损、抗腐蚀,尤其在其中掺入磁流变胶体,可提升结构刚度,提升耐久性。(The invention relates to a water sealing and water stopping piston for a dynamic triaxial apparatus, which comprises: the water seal device comprises an inner piston, an outer piston, a water seal rubber ring, a plurality of water seal brushes and a magnet exciting coil; the outer piston is sleeved outside the inner piston, an outer thread groove is formed in the outer wall of the outer piston, and the exciting coil is wound in the outer thread groove; the outer wall of the inner piston is provided with an inner thread groove, the inner wall of the water stop rubber ring is provided with a thread bulge, the water stop rubber ring is sleeved on the outer wall of the inner piston and is tightly attached to the inner piston through the matching of the thread bulge and the inner thread groove, and the plurality of water stop brushes are bonded on the outer wall of the water stop rubber ring; the water stop rubber ring comprises an inner layer rubber ring and an outer layer rubber ring, and a magnetorheological elastomer is arranged between the inner layer rubber ring and the outer layer rubber ring; the water sealing brush is of a sheet structure, and a magnetorheological elastomer is arranged inside the water sealing brush. The water sealing and stopping piston has an obvious water stopping effect, can effectively resist wear and corrosion, and particularly can improve the structural rigidity and the durability by doping magnetorheological colloid in the piston.)

1. The utility model provides a move triaxial for appearance water seal stagnant water piston which characterized in that includes: the water seal device comprises an inner piston, an outer piston, a water seal rubber ring, a plurality of water seal brushes and a magnet exciting coil;

the outer piston is sleeved outside the inner piston, an outer thread groove is formed in the outer wall of the outer piston, and the exciting coil is wound in the outer thread groove; the outer wall of the inner piston is provided with an inner thread groove, the inner wall of the water stop rubber ring is provided with a thread bulge, the water stop rubber ring is sleeved on the outer wall of the inner piston and is tightly attached to the inner piston through the matching of the thread bulge and the inner thread groove, and the plurality of water stop brushes are bonded on the outer wall of the water stop rubber ring; the water stop rubber ring comprises an inner layer rubber ring and an outer layer rubber ring, and a magnetorheological elastomer is arranged between the inner layer rubber ring and the outer layer rubber ring; the water sealing brush is of a sheet structure, and a magnetorheological elastomer is arranged inside the water sealing brush.

2. The water sealing and stopping piston for the dynamic triaxial apparatus according to claim 1, wherein a plurality of water sealing brushes are bonded to the circumferential surface of the outer wall of the water stopping rubber ring at the same bonding angle.

3. The water-sealing and water-stopping piston for the dynamic triaxial apparatus according to claim 1, wherein a sponge is bonded to the water-sealing brush.

4. The water-sealing and water-stopping piston for the dynamic triaxial apparatus according to claim 1, wherein the water-sealing brush is made of water-absorbent resin.

5. The water-sealing and water-stopping piston for the dynamic triaxial apparatus as set forth in claim 1, wherein the inner wall of the outer piston is made of wear-resistant ceramic.

Technical Field

The invention belongs to the technical field of water sealing and stopping pistons, and relates to a water sealing and stopping piston for a dynamic triaxial apparatus.

Background

In addition to bearing static loads, the earth structures and their foundations are sometimes also subjected to dynamic loads, such as seismic loads caused by earthquakes, vehicles, machinery and explosions. The study and evaluation of the stability and deformation of the geotechnical building and the foundation thereof under the action of dynamic load require the analysis and grasp of the dynamic characteristics of the relevant soil body, such as the deformation characteristics and the strength characteristics of the soil body. The main method for researching the dynamic characteristics of the soil body indoors is dynamic triaxial test, and the geotechnical dynamic triaxial test instrument is an instrument specially used for the dynamic triaxial test, so that the geotechnical dynamic triaxial test instrument is very key for researching the dynamic characteristics of the soil. The dynamic characteristic index of the soil is tested by applying the dynamic triaxial test, which is an advanced test means in the soil test and is gradually popularized and applied in China. Various dynamic parameters of the soil can be determined by utilizing a dynamic triaxial test, and the stability analysis and calculation and other problems of the soil can be carried out by applying the parameters, so that the engineering construction can be better served. Although the geotechnical dynamic triaxial tester for China has been developed for more than fifty years, the geotechnical dynamic triaxial tester still has a large gap with products of foreign well-known companies at present, and water leakage at the piston of the triaxial tester causes inaccurate experimental data and seriously affects the judgment on the soil performance, so that the piston of the triaxial tester is difficult to seal water and stop water, and the research is needed urgently.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a water sealing and stopping piston for a dynamic triaxial apparatus, which has obvious water sealing and stopping effects, can effectively resist wear and corrosion, and particularly can improve the structural rigidity, enhance the water sealing and stopping effects, reduce the occurrence of water leakage and improve the durability by doping magnetorheological colloid into the piston.

The invention provides a water sealing and water stopping piston for a dynamic triaxial apparatus, which comprises: the water seal device comprises an inner piston, an outer piston, a water seal rubber ring, a plurality of water seal brushes and a magnet exciting coil;

the outer piston is sleeved outside the inner piston, an outer thread groove is formed in the outer wall of the outer piston, and the exciting coil is wound in the outer thread groove; the outer wall of the inner piston is provided with an inner thread groove, the inner wall of the water stop rubber ring is provided with a thread bulge, the water stop rubber ring is sleeved on the outer wall of the inner piston and is tightly attached to the inner piston through the matching of the thread bulge and the inner thread groove, and the plurality of water stop brushes are bonded on the outer wall of the water stop rubber ring; the water stop rubber ring comprises an inner layer rubber ring and an outer layer rubber ring, and a magnetorheological elastomer is arranged between the inner layer rubber ring and the outer layer rubber ring; the water sealing brush is of a sheet structure, and a magnetorheological elastomer is arranged inside the water sealing brush.

In the water sealing and water stopping piston for the dynamic triaxial apparatus, a plurality of water sealing brushes are bonded on the circumferential surface of the outer wall of the water stopping rubber ring, and the bonding angles are the same.

In the water sealing and stopping piston for the dynamic triaxial apparatus, sponge is adhered to the water sealing brush.

In the water sealing and stopping piston for the dynamic triaxial apparatus, the water sealing brush is made of water-absorbing resin.

In the water sealing and stopping piston for the dynamic triaxial apparatus, the inner wall of the outer piston is made of wear-resistant ceramics.

According to the water sealing and water stopping piston for the dynamic triaxial apparatus, the water stopping rubber ring is placed in the gap between the inner piston and the outer piston, and the inner piston and the water stopping rubber ring can be tightly attached through the butt joint of the thread bulge on the inner wall of the water sealing rubber ring and the internal thread groove of the inner piston. The outer wall of the water stopping rubber ring is provided with a plurality of water sealing brushes, the outer wall of the outer piston is provided with an outer thread groove, and the magnet exciting coil is wound in the outer thread groove. The inner wall of the outer piston is made of wear-resistant ceramics, and has the advantages of high hardness, strong wear resistance, firm bonding and the like. The traditional rubber ring is easy to age after being used for a long time, so that the sealing is not tight, water leakage is easy to occur and the like. When the outer piston moves up and down, the magnetic field can be applied to the magnetorheological elastomers in the water sealing rubber ring and the water sealing brush by electrifying the magnet exciting coil, so that the rigidity of the water sealing rubber ring and the water sealing brush is instantly improved, and the water sealing and sealing effects of the water sealing piston are effectively enhanced. When water leaks into the structure, the water sealing brush can seal water to a certain extent, and the water-absorbing resin on the upper layer and the lower layer of the water sealing brush can absorb water effectively. The invention has simple structure and easy disassembly, can effectively improve the durability of the rubber ring and the wear resistance of the inner piston and the outer piston, and has obvious water sealing and absorbing functions on a dynamic triaxial apparatus.

Drawings

FIG. 1 is a schematic structural diagram of a water sealing and stopping piston for a dynamic triaxial apparatus of the present invention;

fig. 2 is a schematic structural view of the water stopping collar of the present invention.

Detailed Description

As shown in fig. 1, the water sealing and stopping piston for a dynamic triaxial apparatus of the present invention comprises: the device comprises an inner piston 1, an outer piston 3, a water stop rubber ring 2, a plurality of water sealing brushes 4 and a magnet exciting coil 5.

The outer piston 3 is sleeved outside the inner piston 1, an outer thread groove 31 is formed in the outer wall of the outer piston 3, and the excitation coil 5 is wound in the outer thread groove 31; the outer wall of the inner piston 1 is provided with an inner thread groove 11, the inner wall of the water stop rubber ring 2 is provided with a thread bulge 21, the water stop rubber ring 2 is sleeved on the outer wall of the inner piston 1, and the inner piston 1 is tightly attached through the matching of the thread bulge 21 and the inner thread groove 11. And a plurality of water sealing brushes 4 are bonded on the outer wall of the water sealing rubber ring 2. The water stop rubber ring 2 comprises an inner layer rubber ring and an outer layer rubber ring, and a magnetorheological elastomer is arranged between the inner layer rubber ring and the outer layer rubber ring; the water sealing brush 4 is of a sheet structure, and a magnetorheological elastomer is arranged inside the water sealing brush.

As shown in fig. 2, a plurality of water sealing brushes 4 are bonded on the circumferential surface of the outer wall of the water sealing rubber ring 2, the bonding angles are the same, and the bonding positions have certain toughness. When the outer piston 3 moves up and down, the water-stopping rubber ring 2 and the inner piston 1 are not moved, and the water-sealing brush 4 can swing up and down along with the movement of the outer piston 3, so that a certain water-sealing and water-absorbing effect is achieved. The water sealing brush 4 is made of water-absorbent resin, and the middle of the water sealing brush is filled with a magnetorheological elastomer. The water-absorbing resin has excellent water-absorbing performance, and can effectively absorb water when water leaks from the gap between the inner piston 1 and the outer piston 3. The sponge is bonded on the water sealing brush 4, so that the friction between the water sealing brush 4 and the inner wall of the outer piston 3 can be reduced, the movement smoothness degree of the water sealing brush is improved, and a certain water storage effect is achieved. The inner wall of the outer piston 3 is made of wear-resistant ceramic, and has the characteristics of high hardness, good wear resistance, firm bonding and the like.

The water-stopping rubber ring 2 and the water-sealing brush 4 are filled with magneto-rheological elastomers, when the outer piston 3 moves, the outer piston can be electrified to apply a magnetic field to the structure, so that the magneto-rheological elastomers generate a magneto-rheological effect, the rigidity of the water-stopping rubber ring 2 and the water-sealing brush 4 is improved, and the water-stopping and water-sealing effects of the water-stopping rubber ring and the water-sealing brush are effectively enhanced. The water leakage phenomenon caused by aging of the components due to overlong service time is avoided, and the durability of the components is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.