CN108797231B

CN108797231B - Spring strip anti-flying device and application thereof

Info

Publication number: CN108797231B
Application number: CN201811115082.9A
Authority: CN
Inventors: 李晓林; 吴兰友; 郑锦能
Original assignee: Sanwei Holding Group Co ltd
Current assignee: Sanwei Holding Group Co ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2023-06-16
Anticipated expiration: 2038-09-25
Also published as: CN108797231A

Abstract

The invention relates to a spring strip anti-flying device and application thereof. The elastic strip anti-flying device comprises a rubber matrix and a steel wire rope framework arranged in the rubber matrix; the rubber matrix comprises a first mounting sleeve and a second mounting sleeve, wherein the inner ring of the first mounting sleeve is matched with the elastic strip, and a connecting strip is used for connecting the first mounting sleeve and the second mounting sleeve; the steel wire rope framework comprises a steel wire rope, two ends of the steel wire rope are respectively coiled into O-shaped rings corresponding to the first installation sleeve and the second installation sleeve, the O-shaped rings are arranged in the first installation sleeve and the second installation sleeve, and the rest part of the steel wire rope is arranged in the connecting strip. The bullet strip anti-flying device can effectively prevent the bullet strip from splashing everywhere after being broken, and has the following advantages: the elastic strip can be recycled after being broken, and the use cost is low; after the installation is finished, the observability of the surface of the elastic strip is good, so that railway workers can find out the situation of fracture or crack in time; the railway fastener system is convenient to install and can be used for upgrading and reforming the existing railway fastener system without redesigning related parts.

Description

Spring strip anti-flying device and application thereof

Technical Field

The invention relates to the field of railway engineering, in particular to a spring strip anti-flying device and application thereof in a railway.

Background

Railway rails are the means of supporting the locomotive and maintaining the direction of the locomotive and are secured to the sleepers of the railway ballast by the buckling pressure of the spring strips.

The contact between the train wheel and the rail is rigid, so that vibration is inevitably generated, and the special elastic structure of the elastic strip can absorb impact energy generated when a vehicle passes through, so that the shock absorption effect is achieved. The spring strip works under repeated alternating stress, and is subjected to multiple actions such as bending, torsion, fatigue, corrosion, rail resonance, abrasion and the like, so that the spring strip can be broken. However, after the elastic strip breaks, the unconstrained part can be splashed out, and the vehicle equipment and even pedestrians are hit, so that the vehicle is damaged and even the safety is endangered.

Chinese patent CN108316064a discloses a structure for preventing splashing after breaking of a spring strip of a fastener system, which comprises a spring strip body, wherein the structure for preventing splashing is to cover and wrap a flexible protective sleeve on the spring strip body, so that the flexible protective sleeve is in tight fit connection with the spring strip body. The flexible protective sleeve is used for restraining the broken elastic strip body to prevent the elastic strip body from splashing or popping up after being broken. However, the protective sleeve of the anti-flying structure cannot be recycled after the elastic strip is broken; more serious, when the elastic strip is cracked or even broken, the elastic strip is covered by the protective sleeve, so that the naked eyes cannot find that the serious railway potential safety hazard exists, and meanwhile, the maintenance cost of the railway is increased. In addition, as the elastic strip is installed through interference fit, the protective sleeve can be damaged when in interference press-in at the installation part, so that the anti-flying function is weakened or lost; moreover, since the protection sleeve is installed together with the spring strip body, in order to be suitable for the existing railway fastener system, the spring strip body must be made smaller than the original spring strip in size, so that the spring strip body can be installed smoothly after being covered with the protection sleeve, but this inevitably results in strength reduction, so that the structure is not suitable for upgrading and reforming the existing railway fastener system.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the elastic strip anti-flying device. The bullet strip anti-flying device can effectively prevent the bullet strip from splashing everywhere after being broken, and has the following advantages: the elastic strip can be recycled after being broken, and the use cost is low; after the installation is finished, the observability of the surface of the elastic strip is good, so that railway workers can find out the situation of fracture or crack in time; the railway fastener system is convenient to install and can be used for upgrading and reforming the existing railway fastener system without redesigning related parts. Correspondingly, the invention also provides a spring strip flying-preventing method and a track fastener system using the spring strip flying-preventing device.

For the elastic strip anti-flying device, the technical scheme for solving the technical problems is as follows: the elastic strip anti-flying device comprises a rubber matrix and a steel wire rope framework arranged in the rubber matrix; the rubber matrix comprises a first mounting sleeve and a second mounting sleeve, wherein the inner ring of the first mounting sleeve is matched with the elastic strip, and a connecting strip is used for connecting the first mounting sleeve and the second mounting sleeve; the steel wire rope framework comprises a steel wire rope, two ends of the steel wire rope are respectively coiled into O-shaped rings corresponding to the first installation sleeve and the second installation sleeve, the O-shaped rings are arranged in the first installation sleeve and the second installation sleeve, and the rest part of the steel wire rope is arranged in the connecting strip.

Compared with the prior art, the elastic strip anti-flying device has the following remarkable progress:

1) The specific structure ensures that the spring strip has enough strength and effectively prevents the spring strip from splashing;

2) When the elastic strip anti-flying device is used, only the first mounting sleeve and the second mounting sleeve are sleeved near the two ends of the elastic strip respectively, so that the use is very convenient, after the elastic strip is broken or cracks appear, the elastic strip can be easily detached and then used on a new elastic strip, the resource recycling is realized, and the use cost is very low;

3) When the bullet strip anti-flying device is used, the middle part of the bullet strip is not shielded, so that railway workers can easily find out when cracks or breaks occur, the bullet strip can be replaced in time, safety accidents or serious damages to a railway are avoided, and the maintenance cost of the railway is reduced while the safety is good;

4) The bullet strip anti-flying device and the bullet strip are two independent units, and when the bullet strip is installed, the bullet strip anti-flying device can not be damaged, the reliability is good, and the related parts of the railway fastener system do not need to be redesigned, so that the traditional railway fastener system can be upgraded and improved.

As the optimization of the elastic strip anti-flying device, the length of the steel wire rope connecting strip is 10-15 cm. The length of the connecting strip can influence the performance of the spring strip anti-flying device, if the length of the connecting strip is too short, the spring strip is inconvenient to install, and if the length of the connecting strip is too long, the spring strip can still damage a rail or a train when broken, and researches show that the length of the connecting strip is between 10cm and 15cm, so that the spring strip anti-flying device is convenient to install, and can ensure that the splash part is pulled by the connecting strip after the spring strip breaks in the using process, so that damages to the railway, the train and the like are prevented.

As the optimization of the elastic strip anti-flying device, the widths of the first installation sleeve and the second installation sleeve are 1.5-3 cm, and the thicknesses of the first installation sleeve and the second installation sleeve are 3-6 mm. At this moment, the bullet strip prevents flying the device body shape is small and exquisite simultaneously also less to the shielding area of bullet strip, and the mounted position is fixed, can guarantee after long-time use that the installation cover can not take place to remove to guarantee result of use relatively to the bullet strip.

As the optimization of the elastic strip anti-flying device, 3 rings of steel wire ropes are wound in the first installation sleeve and the second installation sleeve, and the wire diameter of each steel wire rope is 2-4 mm. The wire diameter of the steel wire rope is critical to the strength of the elastic strip anti-flying device, when the steel wire rope is too thin, the tensile strength of the elastic strip anti-flying device is insufficient, the steel wire rope is too thick, the installation is inconvenient, and researches show that the strength of the installation sleeve at the moment is enough, the installation is convenient, and the material cost is well controlled.

As the optimization of the elastic strip anti-flying device, the two ends of the steel wire rope and the joint of the O-shaped ring are fixed through a buckle. Through the button fixing, the steel wire rope framework can be ensured to be firm and stable in the die in the production injection molding process, and the condition that the steel wire is exposed outside the rubber is prevented.

As optimization of the elastic strip flying-preventing device, the material formula of the rubber matrix comprises the following components in parts by weight:

the inventor finds that the specific formula is used in the elastic strip anti-flying device, the friction coefficient between the rubber matrix and the elastic strip is high, the situation of slippage is not easy to occur after the installation is completed, the rubber matrix is softer, the elastic strip is easy to be sleeved by the installation sleeve, and the installation is more convenient; in addition, at this moment, the connection strength of the rubber matrix and the steel wire rope framework is also higher, and the rubber matrix is not easy to age, so that the rubber matrix has longer service life.

As optimization of the elastic strip flying-preventing device, the material formula of the rubber matrix further comprises the following components in parts by weight: 1-2 parts of ultraviolet absorber. Experiments show that the ultraviolet absorber is added in the formula to improve the weather resistance of the product and prevent the rubber from aging under the irradiation of ultraviolet rays, so that the rubber has longer service life. Further, the ultraviolet absorber is preferably a light stabilizer 744; the inventor finds that the light stabilizer 744 can generate a synergistic effect with the anti-aging agent in the formula, so that the service life of the rubber can be further prolonged, and the oxidation resistance and ultraviolet resistance of the rubber are improved.

In the method for preventing the flying of the elastic strip, the first mounting sleeve and the second mounting sleeve of the device for preventing the flying of the elastic strip are respectively sleeved near two ends of the elastic strip.

For a railway fastener system, the track fastener system of the invention comprises an elastic strip, a track, an insulating gauge block, an embedded iron seat and an iron backing plate; the device also comprises the elastic strip anti-flying device; the first installation sleeve and the second installation sleeve of the elastic strip anti-flying device are respectively sleeved near the two ends of the elastic strip.

Drawings

Fig. 1 is a schematic structural view of the spring strip flying-preventing device of the present invention.

Fig. 2 is a plan view of the bullet-proof apparatus of the present invention mounted on a bullet bar, i.e., a plan view in a use state.

Fig. 3 is a front view of the track fastener system of the present invention.

Reference numerals: 1-a rubber matrix, 11-a first mounting sleeve, 12-a second mounting sleeve and 13-connecting strips; 2-a steel wire rope framework and 21-a button; 3-spring strips; 4-track; 5-insulating gauge blocks; 6-embedding an iron seat; 7-an iron backing plate.

Detailed Description

The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings.

In the present invention, the materials and equipment used, unless otherwise specified, are commercially available or commonly used in the art. The methods in the examples described below, unless otherwise indicated, are conventional in the art.

Referring to fig. 1 and 2, the elastic strip flying-preventing device of the invention comprises a rubber matrix 1 and a steel wire rope framework 2 arranged in the rubber matrix 1; the rubber matrix 1 comprises a first mounting sleeve 11 and a second mounting sleeve 12, the inner ring of which is matched with the elastic strip 3, and a connecting strip 13 for connecting the first mounting sleeve 11 and the second mounting sleeve 12; the steel wire rope framework 2 comprises a steel wire rope, two ends of the steel wire rope are respectively coiled into O-shaped rings corresponding to the first installation sleeve 11 and the second installation sleeve 12 and are arranged in the first installation sleeve 11 and the second installation sleeve 12, and the rest part of the steel wire rope is arranged in the connecting strip 13. Referring to fig. 3, the rail fastener system of the present invention includes not only the spring strip 3, the rail 4, the insulation gauge block 5, the pre-buried iron seat 6 and the iron pad 7; compared with the prior art, the track fastener system of the invention further comprises the elastic strip anti-flying device of the invention; the first installation sleeve 11 and the second installation sleeve 12 of the elastic strip anti-flying device are respectively sleeved near the two ends of the elastic strip 3.

The statistics shows that the fracture or crack basically appears in the middle part of the elastic strip 3, so that the first mounting sleeve 11 and the second mounting sleeve 12 of the elastic strip anti-flying device are respectively sleeved near the two ends of the elastic strip 3, and the anti-splashing purpose can be realized. Taking a type III bullet strip as an example (see fig. 2 and 3), two ends of the bullet strip 3 are respectively matched with the insulation track gauge block 5 and the embedded iron seat 6, the first installation sleeve 11 and the first installation sleeve 12 are respectively sleeved near the two ends of the bullet strip 3 (on the premise that installation of the ends of the bullet strip 3 is not affected, the closer the first installation sleeve 11 and the second installation sleeve 12 are, the better the closer the distance between the first installation sleeve 11 and the ends of the bullet strip 3 is, the closer the second installation sleeve is, the better the closer the first installation sleeve is to the ends of the bullet strip are), after the bullet strip 3 breaks, the bullet strip 3 is divided into two parts, namely, the part connected with the second installation sleeve 12 and the part connected with the first installation sleeve 11, and the part connected with the second installation sleeve 12 can splash due to the fact that the part connected with the first installation sleeve 11 is limited by the embedded iron seat 6 can not splash, and therefore the part connected with the second installation sleeve 12 can be pulled in time after flying out, so that damage to a railway and a train is avoided. (the flying-preventing device for the elastic strip of the invention is not limited to be used on a III-type elastic strip, and can be applied to I-type and II-type elastic strips.)

Example 1:

in this embodiment, the length of the connecting strip is 10.5cm, the width of the first mounting sleeve 11 and the second mounting sleeve 12 is 2cm, the thickness is 6mm, and the wire diameter of the steel wire rope is 2.5mm.

The elastic strip anti-flying device of the embodiment is prepared according to the following steps

S1, one-stage mixing:

100 parts of nitrile rubber, 5 parts of zinc oxide, 2.5 parts of anti-aging agent, 2.5 parts of stearic acid and 5 parts of softener are taken and added into an internal mixer, and the mixture is pressurized and mixed for 120-150 seconds at the temperature of 70 ℃. And adding 330 parts of carbon black N and 660 parts of carbon black N, pressurizing and mixing to 130-150 ℃, discharging rubber and cooling the rubber discharge sheet to obtain a section of rubber compound, and standing for 24 hours.

S2, two-stage mixing

Adding a section of mixed rubber, 2.5 parts of accelerator, 3 parts of vulcanizing agent and 2 parts of ultraviolet absorber into an internal mixer, carrying out low-speed pressurizing mixing for 100-150 seconds at the temperature of 90-110 ℃, cooling a rubber discharge piece, obtaining a two-section mixed trapezoidal rubber, and standing for 24 hours.

S3, injection molding

3O-shaped coils with the radius of 1.5cm are wound at the two ends of the steel wire rope and fixed at joints by buttons 21, so that the steel wire rope framework 2 is manufactured.

And (3) installing a steel wire rope framework in the rubber filling mould, curing the upper two sections of mixed trapezoidal rubber, vulcanizing for 35 minutes at 150 ℃, taking out, and standing for 24 hours to obtain the elastic strip anti-flying device.

Example 2

Unlike example 1, in this example, the amounts of the respective raw material components of the rubber matrix were: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1 part of an anti-aging agent, 1 part of stearic acid, 3 parts of a softener, 330 parts of carbon black N, 660 4 parts of carbon black N, 1 part of an accelerator, 5 parts of a vulcanizing agent and 1 part of an ultraviolet absorber; the length of the connecting strip is 12cm, the width of the mounting sleeve is 2.5cm, the thickness is 5mm, and the wire diameter of the steel wire rope is 2.5mm.

Example 3

Unlike example 1, in this example, the amounts of the respective raw material components of the rubber matrix were: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1.5 parts of an anti-aging agent, 1.5 parts of stearic acid, 5 parts of a softener, 330 parts of carbon black N, 660 parts of carbon black N, 1.5 parts of an accelerator, 2 parts of a vulcanizing agent and 1.5 parts of an ultraviolet absorber; the length of the connecting strip is 15cm, the width of the mounting sleeve is 2.5cm, the thickness is 4mm, and the wire diameter of the steel wire rope is 3mm.

Example 4

Unlike example 1, in this example, the amounts of the respective raw material components of the rubber matrix were: 100 parts of nitrile rubber, 7 parts of zinc oxide, 2 parts of an anti-aging agent, 2 parts of stearic acid, 7 parts of a softener, 330 parts of carbon black N, 660 parts of carbon black N, 2 parts of an accelerator, 4 parts of a vulcanizing agent and 1.5 parts of an ultraviolet absorber; the length of the connecting strip is 10cm, the width of the mounting sleeve is 4cm, the thickness is 6mm, and the wire diameter of the steel wire rope is 2mm.

Example 5

Unlike example 1, in this example, the amounts of the respective raw material components of the rubber matrix were: 100 parts of nitrile rubber, 1 part of zinc oxide, 0.5 part of anti-aging agent, 0.5 part of stearic acid, 1 part of softener, 330 parts of carbon black N, 660 parts of carbon black N, 0.5 part of accelerator, 0.5 part of vulcanizing agent and 1 part of ultraviolet absorber; the length of the connecting strip is 10.5cm, the width of the mounting sleeve is 4cm, the thickness is 3mm, and the wire diameter of the steel wire rope is 2.5mm.

TABLE 1

Examples	Tensile Strength/KN
		Example 1	16.76
Example 2	16.75
		Example 3	16.75
Example 4	16.35
		Example 5	16.57

The strength test data for the bullet strip flying height control devices of examples 1-5 are set forth in Table 1 above. The rubber matrix in the invention does not need to adopt the formula of the invention, and when other common rubber formulas are adopted, the tensile strength of the elastic strip anti-flying device can reach 14KN. Research shows that the elastic strip flying-preventing device has tensile strength enough to cope with impact force generated by splashing when the elastic strip breaks.

The above general description of the invention and the description of specific embodiments thereof referred to in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description or/and the embodiments without departing from the scope of the invention.

Claims

1. The device is prevented flying by bullet strip, its characterized in that: comprises a rubber matrix (1) and a steel wire rope framework (2) arranged in the rubber matrix (1); the rubber matrix (1) comprises a first mounting sleeve (11) and a second mounting sleeve (12) which are matched with the elastic strip (3) in the inner ring, and a connecting strip (13) which is used for connecting the first mounting sleeve (11) and the second mounting sleeve (12); the steel wire rope framework (2) comprises a steel wire rope, two ends of the steel wire rope are respectively coiled into O-shaped rings corresponding to the first installation sleeve (11) and the second installation sleeve (12) and are arranged in the first installation sleeve (11) and the second installation sleeve (12), and the rest part of the steel wire rope is arranged in the connecting strip (13); the widths of the first mounting sleeve (11) and the second mounting sleeve (12) are 2-4 cm; the thickness of the first mounting sleeve (11) and the second mounting sleeve (12) is between 3mm and 6 mm.

2. The spring strip flying-preventing device according to claim 1, wherein: the length of the connecting strip (13) is 10-15 cm.

3. The spring strip flying-stop device of claim 1 or 2, wherein: 3 rings of steel wire ropes are arranged in the first mounting sleeve (11) and the second mounting sleeve (12), and the wire diameter of each steel wire rope is 2-4 mm.

4. A spring strip flight protection device as claimed in claim 3, wherein: the two ends of the steel wire rope and the joint of the O-shaped ring are fixed through a button (21).

5. The elastic strip flying-preventing device according to claim 1 or 2, wherein the material formulation of the rubber matrix (1) comprises the following components in parts by weight:

100 parts of nitrile rubber, 330 to 50 parts of carbon black N,

3 to 30 parts of carbon black N660, 3 to 10 parts of zinc oxide,

0.5 to 2.5 portions of stearic acid, 0.5 to 2.5 portions of accelerator,

0.5 to 3.0 parts of anti-aging agent, 1 to 10 parts of softener,

0.5 to 5.0 portions of vulcanizing agent.

6. The strip flying-preventing device according to claim 5, wherein the material formulation of the rubber matrix (1) further comprises the components in parts by weight: 1-2 parts of ultraviolet absorber.

7. The spring strip fly-preventing device according to claim 6, wherein: the ultraviolet absorber is a light stabilizer 744.

8. The method for preventing the spring strip from flying is characterized by comprising the following steps of: the first mounting sleeve (11) and the second mounting sleeve (12) of the elastic strip flying-preventing device of claim 1 are respectively sleeved near two ends of the elastic strip (3).

9. The track fastener system comprises a spring strip (3), a track (4), an insulating gauge block (5), an embedded iron seat (6) and an iron base plate (7); the method is characterized in that: further comprising the spring strip anti-fly device of claim 1; the first installation sleeve (11) and the second installation sleeve (12) of the elastic strip anti-flying device are respectively sleeved near the two ends of the elastic strip (3).