CN115142481A - Railway discontinuous vibration isolator - Google Patents
Railway discontinuous vibration isolator Download PDFInfo
- Publication number
- CN115142481A CN115142481A CN202210896401.4A CN202210896401A CN115142481A CN 115142481 A CN115142481 A CN 115142481A CN 202210896401 A CN202210896401 A CN 202210896401A CN 115142481 A CN115142481 A CN 115142481A
- Authority
- CN
- China
- Prior art keywords
- vibration isolator
- parts
- railway
- titanium dioxide
- dioxide nanotube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Polymers & Plastics (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a railway discontinuous vibration isolator, which is discontinuously arranged on the ground at a certain distance from a railway track in a direction parallel to the railway, wherein a vibration isolator is positioned under the vibration isolator, and the vibration isolator is vertically buried underground and is connected with the vibration isolator; the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 15-25cm; at least one row of said isolators; the vibration isolator is prepared from the following raw materials in parts by weight: 50-70 parts of nitrile rubber, 30-40 parts of natural rubber, 10-20 parts of plasticizer, 2-4 parts of white carbon black, 4-7 parts of phenolic resin, 1-3 parts of vulcanization accelerator, 5-10 parts of modified titanium dioxide nanotube, 3-5 parts of layered graphite and 3-5 parts of anti-aging agent. The vibration isolator has good vibration isolation effect, is convenient to build and is easy to maintain.
Description
Technical Field
The invention belongs to the technical field of building vibration isolation, and particularly relates to a railway discontinuous vibration isolator.
Background
Along with the rapid development and the large-scale large city of the current industry, the traffic demand of the city is continuously increased, and the traffic problem is more and more prominent. The Jingjin intercity railway, jingguang high-speed railway, zheng Xigao iron, huning intercity high-speed railway, huhang high-speed railway, jinghu high-speed railway, hadamard high-speed railway and Lanxin high-speed railway are successively opened and operated, the Chinese high-speed railway leads the rapid development of the high-speed railway all over the world, the speed is faster and faster, the rapid construction speed of the railway is increased in the development process, so that the subsequent supporting facility vibration isolation measures are not followed, the surrounding buildings are influenced by the main vibration function, and the moment of the environmental vibration of the railway cannot be delayed.
Therefore, it has become a key problem to face in railway construction to take corresponding vibration reduction and isolation measures in the vicinity of the periphery of the railway line to reduce the adverse effects caused by railway operation. For vibration of railway transportation, the vibration source control, the vibration propagation control and the building self-control are mainly used for controlling the vibration source control, the vibration propagation control and the building self-control. Aiming at the established railway lines and buildings, the control of vibration transmission becomes an extremely important means.
Chinese patent CN109778919B discloses a vibration isolation dike for reducing railway environment vibration, a dike body is arranged on the ground at a certain distance from a railway line along the direction of the railway line, the cross section of the dike body is in a step shape, the dike body is made of concrete, rubber, foam or other plastic materials, the dike body can be hollow so as to save materials; in addition, the vibration isolation dikes may be arranged in a combination of a plurality of rows of dikes to further attenuate the transmission of vibration waves. Chinese patent CN108948449B discloses an ultralow-hardness high-damping rubber composite material which comprises, by weight, 100 parts of a rubber body, 5-40 parts of a reinforcing agent, 10-50 parts of a plasticizer, 0.5-3 parts of a vulcanizing agent, 2-5 parts of a vulcanization accelerator, 3-17 parts of an active agent, 2-6 parts of an anti-aging agent and 5-50 parts of a high-damping additive. The ultralow-hardness high-damping rubber composite material prepared by the method has good physical and mechanical properties, and has high damping performance while having ultralow hardness. However, the added damping additive is used in a rubber material, so that the hardness of the rubber material is easily increased, and compared with the common low-hardness rubber material formula design, the rubber material processing performance is reduced due to the requirement of higher plasticizer dosage, the mixing uniformity of the rubber material is easily reduced, and the integral damping effect of the rubber is not obviously improved; meanwhile, as the outdoor service time is prolonged, the additive can be slowly separated out, so that the damping effect is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a railway discontinuous vibration isolator which is prepared from the main raw materials of nitrile rubber and natural rubber, wherein the damping performance mainly comes from the mutual friction between the chain segment and the chain segment of the rubber, and after the modified titanium dioxide nanotube is added, the friction between the titanium dioxide particles and the chain segment and the friction between the filler particles can further lose energy, thereby improving the damping performance of the material, and the vibration isolator has good vibration isolation effect, convenient construction and easy maintenance.
In order to achieve the purpose, the invention provides the following technical scheme:
a railway discontinuous vibration isolator is arranged discontinuously on the ground at a certain distance from a railway track and parallel to the railway direction;
the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 15-25cm; at least one row of said isolators;
the vibration isolator is prepared from the following raw materials in parts by weight: 50-70 parts of nitrile rubber, 30-40 parts of natural rubber, 10-20 parts of plasticizer, 2-4 parts of white carbon black, 4-7 parts of phenolic resin, 1-3 parts of vulcanization accelerator, 5-10 parts of modified titanium dioxide nanotube, 3-5 parts of layered graphite and 3-5 parts of anti-aging agent.
Preferably, the plasticizer is one or more of paraffin oil, naphthenic oil and terephthalate; the vulcanization accelerator is one or more of an accelerator ETU, an accelerator TMTD and an accelerator ZDMC; the anti-aging agent is one or more of anti-aging agent RD, anti-aging agent 4010NA and anti-aging agent 4020.
Preferably, the preparation method of the modified titanium dioxide nanotube is as follows:
(a) Adding gamma-mercaptopropyl trimethoxysilane into an anhydrous toluene solvent, adding a titanium dioxide nanotube, performing ultrasonic dispersion, and stirring for reaction to obtain a thiolated titanium dioxide nanotube;
(b) Adding the thiolated titanium dioxide nanotube obtained in the step (a) into deionized water, then adding sodium dodecyl sulfate, adding pyrrole after uniformly stirring, continuously and uniformly stirring, adding FeCl3, carrying out hydrothermal reaction, and filtering, washing and drying after the reaction is finished to obtain a pyrrole/titanium dioxide nanotube;
(c) And (c) mixing the pyrrole/titanium dioxide nanotube, dicyclohexyl-2-benzothiazole sulfonamide and silicon nitride fiber obtained in the step (b), carrying out a melting reaction, and cooling and grinding after the reaction is finished to obtain the modified titanium dioxide nanotube.
Preferably, the mass ratio of the gamma-mercaptopropyltrimethoxysilane to the titanium dioxide nanotubes in the step (a) is 10:4-7; the stirring reaction temperature is 40-60 ℃, the reaction time is 2-4h, and the stirring speed is 150-200r/min.
Preferably, the titanium dioxide nanotubes thiolated in the step (b): sodium lauryl sulfate: pyrrole: the mass ratio of FeCl3 is 100:2-5:8-12:5-10; the hydrothermal reaction temperature is 50-60 ℃, and the reaction time is 2-4h.
Preferably, the mass ratio of the pyrrole/titanium dioxide nanotubes, the dicyclohexyl-2-benzothiazole sulfonamide and the silicon nitride fibers in the step (c) is 10:2-5:5-8; the melting reaction temperature is 100-120 ℃, and the reaction time is 0.5-1h.
Preferably, the preparation method of the vibration isolator comprises the following steps:
(1) Putting nitrile rubber, natural rubber, a plasticizer, white carbon black, a modified titanium dioxide nanotube, laminar graphite and an anti-aging agent into an internal mixer for internal mixing, then discharging sheets on an open rubber mixing mill, and cooling to obtain master batch;
(2) And putting the master batch on an open rubber mixing mill, adding phenolic resin and a vulcanization accelerator, standing to obtain mixed rubber after uniform mixing, and heating and vulcanizing the mixed rubber after molding to obtain the vibration isolator.
Preferably, the banburying temperature is 110-130 ℃, the standing treatment time is not less than 24h, and the vulcanizing treatment temperature is 130-150 ℃ and the time is 0.5-1h.
Preferably, the vibration isolators are arranged 10-15m away from the railway track, and the distance between two adjacent vibration isolators is 3-4m.
Preferably, the included angle between the inclined walls on the two sides of the vibration isolator and the horizontal plane is 35-50 degrees.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the railway discontinuous vibration isolator provided by the invention, the discontinuous vibration isolator is arranged along the railway direction, and then the vibration isolator is arranged into the step-shaped quadrangular pyramid shape, when vibration waves are transmitted, the vibration isolator can absorb the vibration waves transmitted from all directions, and the energy of the vibration waves at each step corner point of the vibration isolator can be decomposed, so that the energy of the vibration waves passing through the vibration isolator relative to the energy of initial incident waves is reduced. Meanwhile, the frequency distribution of the waves can be changed between two adjacent vibration isolators, the energy of the main frequency band of the waves is dispersed, and the vibration effect is favorably reduced.
(2) According to the railway discontinuous vibration isolator provided by the invention, the surface of the titanium dioxide nanotube is modified by gamma-mercaptopropyl trimethoxysilane to provide more reaction sites, so that the synthesized polypyrrole and the titanium dioxide nanotube are combined more stably, the whole titanium dioxide nanotube particle is coated by the polypyrrole, and the rigid surface is changed into an elastic surface, so that on one hand, vibration is easily transmitted to the titanium dioxide particle, and part of energy is consumed by the vibration of the particle, and on the other hand, the elastic layer also has certain absorption on vibration energy; finally, the small molecular substance dicyclohexyl-2-benzothiazole sulfonamide is coated on the titanium dioxide nanotube and the silicon nitride fiber through a melting reaction, so that a hydrogen bond formed by a polar group in the rubber and a polar group (-OH or-NH 2) carried by the small molecule, and when an external force is applied and removed, the hydrogen bond in the material is correspondingly broken and repaired, thereby consuming a large amount of energy and further improving the damping performance of the vibration isolator material.
(3) According to the railway discontinuous vibration isolator provided by the invention, the main raw materials of the vibration isolator are nitrile rubber and natural rubber, the damping performance of the vibration isolator mainly comes from the mutual friction action between the chain segments of the rubber, and after the modified titanium dioxide nanotube is added, the friction between the titanium dioxide particles and the chain segments and the friction action between the filler particles can further lose energy, so that the damping performance of the material is improved; meanwhile, the tubular titanium dioxide nanotube is easy to extrude and slide under the action of external force due to the specific length-diameter ratio, so that the damping performance of the composite material is improved, the moving capacity is higher, the energy loss is more facilitated, and the damping performance of the material is better.
Drawings
Fig. 1 is a schematic structural view of discontinuous vibration isolation for railway in embodiment 1 of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic structural view of the vibration isolator in embodiment 1 of the present invention.
Wherein, 1, railway pavement; 2. a vibration isolator; 3. and (5) building the surroundings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A railway discontinuous vibration isolator is characterized in that the vibration isolator is discontinuously arranged on the ground at a certain distance from a railway track in a direction parallel to the railway; the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 15cm; the vibration isolators are in a row; the vibration isolators are arranged at a position 10m away from the railway track, and the distance between every two adjacent vibration isolators is 3m; the inclined walls on two sides of the vibration isolator form an included angle of 35 degrees with the horizontal plane.
The preparation method of the vibration isolator material comprises the following steps:
(1) 50 parts of nitrile rubber, 40 parts of natural rubber, 10 parts of paraffin oil, 2 parts of white carbon black, 5 parts of modified titanium dioxide nanotubes, 3 parts of lamellar graphite and 3 parts of antioxidant RD are put into an internal mixer for internal mixing at the temperature of 110 ℃, and then the mixture is discharged from an open rubber mixing mill and cooled to obtain master batch;
(2) Putting the master batch into an open rubber mixing mill, adding 4 parts of phenolic resin and 1 part of accelerator ETU, uniformly mixing, standing for 24 hours to obtain mixed rubber, forming the mixed rubber, and then heating and vulcanizing at the temperature of 130 ℃ for 1 hour to obtain the vibration isolator.
The preparation method of the modified titanium dioxide nanotube comprises the following steps:
(a) Adding gamma-mercaptopropyl trimethoxy silane into an anhydrous toluene solvent, adding a titanium dioxide nanotube, performing ultrasonic dispersion, and stirring for reaction at the stirring reaction temperature of 40 ℃ for 4 hours at the stirring speed of 200r/min to obtain a thiolated titanium dioxide nanotube; the mass ratio of the gamma-mercaptopropyl trimethoxy silane to the titanium dioxide nanotube is 10:4;
(b) Adding the thiolated titanium dioxide nanotube obtained in the step (a) into deionized water, then adding sodium dodecyl sulfate, stirring uniformly, then adding pyrrole, stirring uniformly, adding FeCl 3 Carrying out hydrothermal reaction at 50 ℃ for 4h, and filtering, washing and drying after the reaction is finished to obtain the pyrrole/titanium dioxide nanotube; sulfhydrylation of titanium dioxide nanotubes: sodium lauryl sulfate: pyrrole: feCl 3 The mass ratio of (A) to (B) is 100:2:8:5;
(c) Mixing the pyrrole/titanium dioxide nanotube, dicyclohexyl-2-benzothiazole sulfonamide and silicon nitride fiber obtained in the step (b), carrying out a melting reaction for 1h at 105 ℃, cooling and grinding after the reaction is finished to obtain the modified titanium dioxide nanotube, wherein the mass ratio of the pyrrole/titanium dioxide nanotube to the dicyclohexyl-2-benzothiazole sulfonamide to the silicon nitride fiber is 10:2:5.
example 2
A railway discontinuous vibration isolator is arranged discontinuously on the ground at a certain distance from a railway track and parallel to the railway direction; the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 20cm; the vibration isolators are in a row; the vibration isolators are arranged 13m away from the railway track, and the distance between every two adjacent vibration isolators is 4m; the inclined walls on two sides of the vibration isolator form an included angle of 45 degrees with the horizontal plane.
The preparation method of the vibration isolator material comprises the following steps:
(1) Putting 60 parts of nitrile rubber, 35 parts of natural rubber, 15 parts of naphthenic oil, 3 parts of white carbon black, 8 parts of modified titanium dioxide nanotubes, 4 parts of layered graphite and 4 parts of anti-aging agent 4010NA into an internal mixer for internal mixing, wherein the internal mixing temperature is 120 ℃, and then discharging sheets on an open rubber mixing mill and cooling to obtain master batch;
(2) Putting the master batch into an open rubber mixing mill, adding 6 parts of phenolic resin and 2 parts of an accelerator TMTD, uniformly mixing, standing for treatment to obtain mixed rubber, wherein the standing time is not 30h, then molding the mixed rubber, and heating and vulcanizing the molded mixed rubber at the temperature of 140 ℃ for 1h to obtain the vibration isolator.
The preparation method of the modified titanium dioxide nanotube comprises the following steps:
(a) Adding gamma-mercaptopropyl trimethoxy silane into an anhydrous toluene solvent, adding a titanium dioxide nanotube, performing ultrasonic dispersion, and stirring for reaction at the stirring reaction temperature of 50 ℃ for 3 hours at the stirring speed of 180r/min to obtain a thiolated titanium dioxide nanotube; the mass ratio of the gamma-mercaptopropyl trimethoxy silane to the titanium dioxide nanotube is 10:6;
(b) Adding the thiolated titanium dioxide nanotube obtained in the step (a) into deionized water, then adding sodium dodecyl sulfate, stirring uniformly, then adding pyrrole, stirring uniformly, adding FeCl 3 Carrying out hydrothermal reaction at 55 ℃ for 3h, and filtering, washing and drying after the reaction is finished to obtain the pyrrole/titanium dioxide nanotube; thiolated titanium dioxide nanotubes: sodium lauryl sulfate: pyrrole: feCl 3 The mass ratio of (A) to (B) is 100:3:10:8;
(c) Mixing the pyrrole/titanium dioxide nanotube, dicyclohexyl-2-benzothiazole sulfonamide and silicon nitride fiber obtained in the step (b), carrying out a melting reaction for 1h at 110 ℃, cooling and grinding after the reaction is finished to obtain the modified titanium dioxide nanotube, wherein the mass ratio of the pyrrole/titanium dioxide nanotube to the dicyclohexyl-2-benzothiazole sulfonamide to the silicon nitride fiber is 10:3:7.
example 3
A railway discontinuous vibration isolator is arranged discontinuously on the ground at a certain distance from a railway track and parallel to the railway direction; the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 25cm; the vibration isolators are in a row; the vibration isolators are arranged 15m away from the railway track, and the distance between every two adjacent vibration isolators is 4m; the included angle between the inclined walls on the two sides of the vibration isolator and the horizontal plane is 50 degrees.
The preparation method of the vibration isolator material comprises the following steps:
(1) 70 parts of nitrile rubber, 30 parts of natural rubber, 20 parts of terephthalate, 4 parts of white carbon black, 10 parts of modified titanium dioxide nanotubes, 5 parts of lamellar graphite and 5 parts of anti-aging agent 4020 are put into an internal mixer for internal mixing at the temperature of 130 ℃, and then sheets are taken out from an open rubber mixing mill and cooled to obtain master batch;
(2) Putting the master batch on an open rubber mixing mill, adding 7 parts of phenolic resin and 3 parts of accelerator ZDMC, standing after uniform mixing to obtain mixed rubber, wherein the standing time is not 36h, then heating and vulcanizing the mixed rubber after molding, and the temperature of the vulcanizing treatment is 150 ℃ and the time is 0.5h to obtain the vibration isolator.
The preparation method of the modified titanium dioxide nanotube comprises the following steps:
(a) Adding gamma-mercaptopropyl trimethoxy silane into an anhydrous toluene solvent, adding a titanium dioxide nanotube, performing ultrasonic dispersion, and stirring for reaction at the stirring reaction temperature of 60 ℃ for 2 hours at the stirring speed of 200r/min to obtain a thiolated titanium dioxide nanotube; the mass ratio of the gamma-mercaptopropyl trimethoxy silane to the titanium dioxide nanotube is 10:7;
(b) Adding the thiolated titanium dioxide nanotubes obtained in step (a) to deionized water, followed by addition of sodium dodecyl sulfateAdding pyrrole after stirring uniformly, continuing stirring uniformly, adding FeCl 3 Carrying out hydrothermal reaction at 60 ℃ for 2h, and filtering, washing and drying after the reaction is finished to obtain the pyrrole/titanium dioxide nanotube; sulfhydrylation of titanium dioxide nanotubes: sodium lauryl sulfate: pyrrole: feCl 3 The mass ratio of (A) to (B) is 100:5:12:10;
(c) Mixing the pyrrole/titanium dioxide nanotube, dicyclohexyl-2-benzothiazole sulfonamide and silicon nitride fiber obtained in the step (b), carrying out a melting reaction for 0.5h at 120 ℃, cooling and grinding after the reaction is finished to obtain the modified titanium dioxide nanotube, wherein the mass ratio of the pyrrole/titanium dioxide nanotube to the dicyclohexyl-2-benzothiazole sulfonamide to the silicon nitride fiber is 10:5:8.
comparative example 1
A railway discontinuous vibration isolator is arranged discontinuously on the ground at a certain distance from a railway track and parallel to the railway direction; the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 15cm; the vibration isolators are in a row; the vibration isolators are arranged at a position 10m away from the railway track, and the distance between every two adjacent vibration isolators is 3m; the inclined walls on two sides of the vibration isolator form an included angle of 35 degrees with the horizontal plane.
The preparation method of the vibration isolator material comprises the following steps:
(1) 50 parts of nitrile rubber, 40 parts of natural rubber, 10 parts of paraffin oil, 2 parts of white carbon black, 3 parts of layered graphite and 3 parts of antioxidant RD are put into an internal mixer for internal mixing at the temperature of 110 ℃, and then the mixture is discharged from an open rubber mixing mill and cooled to obtain master batch;
(2) Putting the master batch into an open rubber mixing mill, adding 4 parts of phenolic resin and 1 part of accelerator ETU, uniformly mixing, standing for 24 hours to obtain mixed rubber, forming the mixed rubber, and then heating and vulcanizing at the temperature of 130 ℃ for 1 hour to obtain the vibration isolator.
The vibration isolator materials prepared in the embodiments 1-3 and the comparative example 1 are subjected to performance tests, the tensile strength and the elongation at break are tested according to a national standard GB/T528-2009 method, and the tensile rate is set to be 500mm/min;
and (3) loss factor testing: the loss factor is also called as "damping factor", "damping coefficient", etc., and is equal to the ratio of the loss modulus to the storage modulus of a material, with larger representing better damping performance. The test method specifically comprises the following steps: and testing the loss factor value of the material between minus 40 ℃ and plus 120 ℃ by using a Dynamic Mechanical Analyzer (DMA), and taking the maximum peak value as the loss factor. The test results are given in table 1 below:
TABLE 1 results of testing the properties of the vibration isolator materials
| Tensile Strength (MPa) | Elongation at Break (%) | Loss factor (Peak) | |
| Example 1 | 13.2 | 700 | 2.08 |
| Example 2 | 12.5 | 740 | 2.23 |
| Example 3 | 13.6 | 830 | 2.17 |
| Comparative example 1 | 10.9 | 680 | 0.82 |
As can be seen from table 1, in terms of damping performance expressed by loss factors, the examples of the present invention are all better than the comparative example, which shows that the vibration isolator material prepared by the present invention has good vibration isolation performance and better mechanical strength.
The railway discontinuous vibration isolator in the embodiment 2 is measured according to the standard TBT 3152-2007 railway environmental vibration measurement, and when the position 20m away from the center of the track is monitored, the vibration response is reduced by 11dB, so that the energy of train vibration can be effectively prevented and reduced from being transmitted to a building, and the railway discontinuous vibration isolator has a good vibration isolation effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A railway discontinuous vibration isolator is characterized in that the vibration isolator is discontinuously arranged on the ground at a certain distance from a railway track in a direction parallel to the railway;
the vibration isolator is in a stepped quadrangular frustum pyramid shape, the bottom surface of the vibration isolator is 3mx3m square, the top surface of the vibration isolator is 1mx1m square, and the step height is 15-25cm; at least one row of said isolators;
the vibration isolator is prepared from the following raw materials in parts by weight: 50-70 parts of nitrile rubber, 30-40 parts of natural rubber, 10-20 parts of plasticizer, 2-4 parts of white carbon black, 4-7 parts of phenolic resin, 1-3 parts of vulcanization accelerator, 5-10 parts of modified titanium dioxide nanotube, 3-5 parts of layered graphite and 3-5 parts of anti-aging agent.
2. The railway discontinuous vibration isolator as claimed in claim 1, wherein the plasticizer is one or more of paraffin oil, naphthenic oil and terephthalate; the vulcanization accelerator is one or more of an accelerator ETU, an accelerator TMTD and an accelerator ZDMC; the anti-aging agent is one or more of anti-aging agent RD, anti-aging agent 4010NA and anti-aging agent 4020.
3. The railway discontinuous vibration isolator according to claim 1, wherein the preparation method of the modified titanium dioxide nanotube is as follows:
(a) Adding gamma-mercaptopropyl trimethoxysilane into an anhydrous toluene solvent, adding a titanium dioxide nanotube, performing ultrasonic dispersion, and stirring for reaction to obtain a thiolated titanium dioxide nanotube;
(b) Adding the thiolated titanium dioxide nanotube obtained in the step (a) into deionized water, then adding sodium dodecyl sulfate, stirring uniformly, then adding pyrrole, stirring uniformly, adding FeCl 3 Carrying out hydrothermal reaction, and filtering, washing and drying after the reaction is finished to obtain the pyrrole/titanium dioxide nanotube;
(c) Mixing the pyrrole/titanium dioxide nanotube obtained in the step (b), dicyclohexyl-2-benzothiazole sulfonamide and silicon nitride fiber, carrying out a melting reaction, cooling and grinding after the reaction is finished, thereby obtaining the modified titanium dioxide nanotube.
4. The railway discontinuous vibration isolator according to claim 3, wherein the mass ratio of gamma-mercaptopropyl trimethoxysilane to the titanium dioxide nanotubes in the step (a) is 10:4-7; the stirring reaction temperature is 40-60 ℃, the reaction time is 2-4h, and the stirring speed is 150-200r/min.
5. The railroad discontinuous vibration isolator according to claim 3, wherein the ratio of thiolated titanium dioxide nanotubes in step (b): ten itemsSodium dialkyl sulfate: pyrrole: feCl 3 The mass ratio of (A) to (B) is 100:2-5:8-12:5-10; the hydrothermal reaction temperature is 50-60 ℃, and the reaction time is 2-4h.
6. The railway discontinuous vibration isolator as claimed in claim 3, wherein the mass ratio of the pyrrole/titanium dioxide nanotubes, the dicyclohexyl-2-benzothiazole sulfenamide and the silicon nitride fibers in the step (c) is 10:2-5:5-8; the melting reaction temperature is 100-120 ℃, and the reaction time is 0.5-1h.
7. The railway discontinuous vibration isolator as claimed in claim 1, wherein the preparation method of the vibration isolator comprises the following steps:
(1) Putting nitrile rubber, natural rubber, a plasticizer, white carbon black, a modified titanium dioxide nanotube, laminar graphite and an anti-aging agent into an internal mixer for internal mixing, then discharging sheets on an open rubber mixing mill, and cooling to obtain master batch;
(2) And putting the master batch into an open rubber mixing mill, adding phenolic resin and a vulcanization accelerator, uniformly mixing, standing to obtain mixed rubber, forming the mixed rubber, and heating and vulcanizing to obtain the vibration isolator.
8. The discontinuous vibration isolator for railways according to claim 7, wherein the banburying temperature is 110-130 ℃, the time of the parking treatment is not less than 24 hours, the temperature of the vulcanization treatment is 130-150 ℃, and the time is 0.5-1 hour.
9. The railway discontinuous vibration isolator according to claim 1, wherein the vibration isolator is arranged at a distance of 10-15m from a railway track, and the distance between two adjacent vibration isolators is 3-4m.
10. The railway discontinuous vibration isolator according to claim 1, wherein the inclined walls on both sides of the vibration isolator form an angle of 35-50 degrees with the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896401.4A CN115142481B (en) | 2022-07-28 | 2022-07-28 | Discontinuous vibration isolator for railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210896401.4A CN115142481B (en) | 2022-07-28 | 2022-07-28 | Discontinuous vibration isolator for railway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115142481A true CN115142481A (en) | 2022-10-04 |
| CN115142481B CN115142481B (en) | 2023-05-16 |
Family
ID=83414871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210896401.4A Active CN115142481B (en) | 2022-07-28 | 2022-07-28 | Discontinuous vibration isolator for railway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115142481B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220917A (en) * | 2016-07-27 | 2016-12-14 | 广西南宁胜祺安科技开发有限公司 | A kind of vibration-absorptive material as high ferro guide rail backing plate |
| CN108948449A (en) * | 2018-05-29 | 2018-12-07 | 株洲时代新材料科技股份有限公司 | A kind of super-low-hardness high-damping rubber composite material and preparation method, application |
| CN109778919A (en) * | 2019-03-25 | 2019-05-21 | 华东交通大学 | A kind of vibration isolation dike for reducing railway environment vibration |
| AU2020100293A4 (en) * | 2019-07-17 | 2020-04-02 | Qilu University Of Technology | Modified nano cellulose fiber and preparation method as well as application in catalyzing degradation of methylene blue |
| CN114044946A (en) * | 2021-11-30 | 2022-02-15 | 常州松英视液镜有限公司 | Shock pad and preparation process thereof |
| CN114606807A (en) * | 2022-04-18 | 2022-06-10 | 武汉铁路职业技术学院 | Vibration isolation structure for reducing railway vibration |
-
2022
- 2022-07-28 CN CN202210896401.4A patent/CN115142481B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220917A (en) * | 2016-07-27 | 2016-12-14 | 广西南宁胜祺安科技开发有限公司 | A kind of vibration-absorptive material as high ferro guide rail backing plate |
| CN108948449A (en) * | 2018-05-29 | 2018-12-07 | 株洲时代新材料科技股份有限公司 | A kind of super-low-hardness high-damping rubber composite material and preparation method, application |
| CN109778919A (en) * | 2019-03-25 | 2019-05-21 | 华东交通大学 | A kind of vibration isolation dike for reducing railway environment vibration |
| AU2020100293A4 (en) * | 2019-07-17 | 2020-04-02 | Qilu University Of Technology | Modified nano cellulose fiber and preparation method as well as application in catalyzing degradation of methylene blue |
| CN114044946A (en) * | 2021-11-30 | 2022-02-15 | 常州松英视液镜有限公司 | Shock pad and preparation process thereof |
| CN114606807A (en) * | 2022-04-18 | 2022-06-10 | 武汉铁路职业技术学院 | Vibration isolation structure for reducing railway vibration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115142481B (en) | 2023-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110453562B (en) | Method for improving self-healing of cold-mix asphalt mixture based on nano carbon fiber | |
| WO2014129758A1 (en) | Novel highly viscoelastic warm mix modifier composition and preparation method therefor, and new and regenerated warm mix modified asphalt concrete mixture composition and preparation method therefor | |
| CN102002193B (en) | Foamed rubber plate and manufacturing process thereof | |
| CN101817957B (en) | Low-lag microcellular rubber material for oscillation reduction of high-speed railway fastener and preparation method thereof | |
| KR102119736B1 (en) | Modified-Asphalt Concrete Compositions for Pavement of Roads Using Styrene Isoprene Styrene, Styrene Ethylene Butylene Styrene, Recycling Asphalt and Aggregate-powder of Improved Grain Size and Constructing Methods Using Thereof | |
| CN102174265B (en) | Anti-rutting additive with high modulus and high strength as well as preparation method and applications thereof | |
| Hong et al. | Evaluation of polyurethane dense graded concrete prepared using the vacuum assisted resin transfer molding technology | |
| CN104479196A (en) | Sound and shock insulating composition for automobile interior decoration industry | |
| CN113150568A (en) | Modified cold-mixed cold-paved normal-temperature asphalt and preparation method thereof | |
| CN115142481A (en) | Railway discontinuous vibration isolator | |
| CN103588424A (en) | Durable high-modulus asphalt mixture based on hard asphalt particles | |
| CN107033467A (en) | Elastomeric compound and streetcar track microcellular rubber resilient sleeper-bearing and preparation method thereof | |
| KR101171338B1 (en) | Environmental warm asphalt paving method, modifided asphalt binder and the producing method thereof | |
| CN104355569A (en) | Compound modified asphalt concrete | |
| CN112574583A (en) | High-modulus asphalt material with excellent durability and preparation method thereof | |
| CN104250446A (en) | Warm asphalt modifier and preparation method and application thereof | |
| CN102432949A (en) | Buffer rubber cushion for high-speed rail, and preparation method for buffer rubber cushion | |
| CN116589228A (en) | Asphalt cold-patch production process | |
| Li | Study on SBS/rubber composite modified asphalt ultra-thin wear layer | |
| CN100368244C (en) | Railroad stock vibration attenuation noise lowering method and material | |
| CN109467932B (en) | Rubber material prepared from waste insulating silicone rubber and application thereof | |
| CN113800821B (en) | Damping vibration-damping noise-reducing asphalt mixture and preparation method thereof | |
| CN103756340A (en) | Asphalt modifier and preparation method thereof | |
| KR102119747B1 (en) | Middle Temperature Asphalt Concrete Compositions Having Styrene Isoprene Styrene, Styrene Ethylene Butylene Styrene, Recycling Asphalt and Aggregate-powder of Improved Grain Size and Constructing Methods Using Thereof | |
| KR102119744B1 (en) | Middle Temperature Asphalt Concrete Compositions Having Styrene Isoprene Styrene, Styrene Ethylene Butylene Styrene and Aggregate-powder of Improved Grain Size and Constructing Methods Using Thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |