CN113914149A - Switch rail bottom protective sleeve and preparation method and application thereof - Google Patents
Switch rail bottom protective sleeve and preparation method and application thereof Download PDFInfo
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- CN113914149A CN113914149A CN202111307918.7A CN202111307918A CN113914149A CN 113914149 A CN113914149 A CN 113914149A CN 202111307918 A CN202111307918 A CN 202111307918A CN 113914149 A CN113914149 A CN 113914149A
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- Prior art keywords
- side wall
- hook
- shaped structure
- rail bottom
- rail
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/02—Tongues; Associated constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/20—Safety means for switches, e.g. switch point protectors, auxiliary or guiding rail members
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- Engineering & Computer Science (AREA)
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Abstract
A switch rail bottom protective sleeve and a preparation method and application thereof are provided, the protective sleeve comprises a bottom, a first side wall and a second side wall are respectively and vertically arranged at two ends of the bottom, and the first side wall and the second side wall are arranged on the same side of the bottom; one ends, far away from the bottom, of the first side wall and the second side wall are respectively provided with a first hook-shaped structure and a second hook-shaped structure, the first hook-shaped structure and the second hook-shaped structure respectively extend from one ends of the first side wall and the second side wall to the direction of the central line of the bottom, and the extended end portions are arranged on one side, far away from the bottom; the inclination of the first hook-shaped structure is 1 (2.76-13); the inclination of the second hook-shaped structure is 1 (17-20). The protective sleeve is directly fixed on the rail bottom of the switch rail by utilizing the self structure, so that the damage to the switch rail caused by the direct contact of a lifting appliance or a construction tool and the rail bottom of the switch rail is avoided and the rail bottom of the switch rail is effectively protected on the premise of not influencing the laying of the switch rail.
Description
Technical Field
The invention relates to the technical field of turnouts, in particular to a switch rail bottom protective sleeve and a preparation method and application thereof.
Background
With the development of high-speed rails, the demand of high-speed turnouts is increasing, and the protection of high-speed turnout rail members is more and more important. At present, when a high-speed turnout of a special passenger line leaves a factory, a switch machine packs and transports a whole set of turnout to the site, a stock rail and a switch rail are closely matched, an elastic iron base plate is assembled under a rail piece according to the distance between switch sleepers, but the bottom of the switch rail is not integrally protected. In the laying site of the tongue rail bottom, when a lifting machine lifts the tongue rail assembly, a lifting belt or a lifting appliance can be in direct contact with the tongue rail bottom, so that the tongue rail bottom is scratched, and when the tongue rail assembly is assembled and adjusted, the tongue rail needs to be opened and closed, tools used by constructors in operation can be in direct contact with the tongue rail bottom and apply force to the tongue rail bottom, so that the tongue rail bottom can be damaged to a certain degree.
Therefore, aiming at the special structure of the tongue rail bottom, the invention particularly provides a special protective sleeve for protecting the tongue rail bottom, in order to avoid the damage of the tongue rail bottom, improve the product quality and improve the safety performance of a high-speed turnout.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a switch rail bottom protective sleeve which can be suitable for a special-shaped structure of a switch rail bottom and integrally protect the switch rail bottom. The protective sleeve is directly fixed on the rail bottom of the switch rail by utilizing the self structure, so that the damage to the switch rail caused by the direct contact of a lifting appliance or a construction tool and the rail bottom of the switch rail is avoided on the premise of not influencing the laying of the switch rail, the rail bottom of the switch rail is effectively protected, the quality of the rail bottom of the switch rail is improved, and the safety performance of the high-speed turnout is obviously improved.
The invention also aims to provide a preparation method of the switch rail bottom protective sleeve, which is simple and is suitable for different parts of the switch rail by adopting a mold and specific vulcanization conditions.
Another object of the present invention is to provide the use of protective sleeves for protecting high speed switch rails on passenger lines.
The invention is realized by the following steps:
a switch rail bottom protective sleeve comprises a bottom, wherein a first side wall and a second side wall are respectively and vertically arranged at two ends of the bottom, and the first side wall and the second side wall are arranged on the same side of the bottom; a first hook-shaped structure and a second hook-shaped structure are respectively arranged at one ends, far away from the bottom, of the first side wall and the second side wall, the first hook-shaped structure and the second hook-shaped structure respectively extend from one ends of the first side wall and the second side wall to the direction of the central line of the bottom, and the extended end portions are arranged at one sides, far away from the bottom;
the inclination of the first hook-shaped structure is 1 (2.76-13); the inclination of the second hook-shaped structure is 1 (17-20).
The inclination of the first hook-shaped structure is 1 (2.76-13), the inclination of the second hook-shaped structure is 1 (17-20), and under the condition that other fixing devices are not needed, the switch rail bottom protective sleeve can be effectively and directly fixed on the rail bottom of the switch rail, so that the switch rail bottom protective sleeve cannot fall off in the switch rail transportation and laying processes, and the purpose of protecting the switch rail bottom is achieved.
The switch rail bottom protective sleeve can be suitable for the special-shaped structure of the switch rail bottom and integrally protects the switch rail bottom. The protective sleeve is directly fixed on the rail bottom of the switch rail by utilizing the self structure, so that the damage to the switch rail caused by the direct contact of a lifting appliance or a construction tool and the rail bottom of the switch rail is avoided on the premise of not influencing the laying of the switch rail, the rail bottom of the switch rail is effectively protected, the quality of the rail bottom of the switch rail is improved, and the safety performance of the high-speed turnout is obviously improved.
The width of the first hook structure is 10-50 mm;
preferably, the width of the second hook-shaped structure is 10-70 mm.
The width of the first hook-shaped structure and the second hook-shaped structure in the range ensures the contact area of the first hook-shaped structure and the second hook-shaped structure with the rail bottom of the switch rail, improves the friction force and ensures that the protective sleeve is fixed on the switch rail and cannot fall off.
The width of the bottom is 120-150 mm; the width range of the bottom ensures that the switch rail bottom protective sleeve can be used for different positions of the switch rail bottom with a special-shaped structure.
The height of the first side wall is 20-23.3 mm;
preferably, the height of the second side wall is 20-21.2 mm.
The arrangement of the height ranges of the first side wall and the second side wall is beneficial to the close fitting of the switch rail bottom protective sleeve and the switch rails at different positions, no gap exists, and the switch rails are better wrapped in the protective sleeve.
In a preferred embodiment, the slope of the first hook-type structure is 1: 2.76; the inclination of the second hook-shaped structure is 1: 17; the width of the first hook-shaped structure is 10mm, the width of the second hook-shaped structure is 70mm, the width of the bottom of the first hook-shaped structure is 120mm, the height of the first side wall is 23.3mm, and the height of the second side wall is 20 mm. The point rail foot protective sleeve can be used in the range from the point to the point rail foot width of about 120 mm.
In a preferred embodiment, the slope of the first hook-type structure is 1: 13; the inclination of the second hook-shaped structure is 1: 17; the width of the first hook-shaped structure is 10mm, the width of the second hook-shaped structure is 10mm, the width of the bottom of the first hook-shaped structure is 130mm, the height of the first side wall is 20mm, and the height of the second side wall is 21.2 mm. The tongue rail bottom protective sleeve can be used in the range of 120 plus 130mm of the tongue rail bottom and the elastic bendable section at the rear end of the tip.
In a preferred embodiment, the slope of the first hook-type structure is 1: 13; the inclination of the second hook-shaped structure is 1: 20; the width of the first hook-shaped structure is 50mm, the width of the second hook-shaped structure is 60mm, the width of the bottom is 138mm, the height of the first side wall is 20.9mm, and the height of the second side wall is 20 mm. The switch rail bottom protective sleeve can be used at the rail bottom within the range of 130 mm-the whole section of the switch rail bottom.
In a preferred embodiment, the slope of the first hook-type structure is 1: 13; the inclination of the second hook-shaped structure is 1: 17; the width of the first hook-shaped structure is 40mm, the width of the second hook-shaped structure is 70mm, the width of the bottom of the first hook-shaped structure is 150mm, the height of the first side wall is 20mm, and the height of the second side wall is 20 mm. The point rail bottom protective sleeve can be used at the whole section of the point rail.
According to the invention, through setting the slope and width of the first hook-shaped structure and the second hook-shaped structure, the width of the bottom and the special height parameters of the first side wall and the second side wall, the switch rail bottom protective sleeve is suitable for different positions of the special-shaped structure of the switch rail bottom, and the switch rail bottom is integrally protected.
The length of the switch rail bottom protective sleeve is 0.01-50 m.
The preparation method of the switch rail bottom protective sleeve comprises the following steps: the switch rail bottom protective sleeve is obtained by putting the raw materials into a mold for vulcanization after banburying and open milling, and vulcanizing.
The raw material is any one of foamed ultrahigh molecular weight polyethylene material, rubber or polyester material;
preferably, the raw material is rubber.
The vulcanization temperature is 157-178 ℃, the pressure is 15-20 Mpa, and the time is 8-10 min. If the temperature is lower than the range, the product is not molded after vulcanization and is incomplete; if the temperature is higher than the range, the size of the obtained product is reduced, and the product cannot be used for the tongue rail bottom. To obtain a particular size of the protective sleeve according to the invention, the temperature, pressure and time of vulcanization are strictly within this range, which would otherwise lead to tearing of the protective sleeve and a reduction in the strength of the protective sleeve.
The internal mixing and the open mixing of the invention adopt the method in the prior art.
The protective sleeve is applied to protecting the high-speed turnout switch rail of a passenger special line.
The working principle of the switch rail bottom protective sleeve is as follows: after the turnout of the special line for the passenger is assembled, a rail bottom protective sleeve is installed, a first hook type structure penetrates through one side of the rail bottom of the switch rail, the rail bottom of one side of the switch rail is sleeved into a first side wall, a second hook type structure penetrates through the other side of the rail bottom of the switch rail, the rail bottom of the other side is sleeved into a second side wall, the protective sleeve can wrap the whole rail bottom of the switch rail, and the first hook type structure and the second hook type structure fix the rail bottom of the switch rail in the protective sleeve. In the subsequent transportation and laying process of the switch rail, the protective sleeve cannot fall off, the laying of the switch rail cannot be influenced, the direct contact between a tool and the switch rail is avoided, the damage to the switch rail in the construction process can be avoided, and the rail bottom of the switch rail is effectively protected.
The invention has the following beneficial effects:
(1) the switch rail bottom protective sleeve can be suitable for the special-shaped structure of the switch rail bottom and integrally protects the switch rail bottom. The protective sleeve is directly fixed on the rail bottom of the switch rail by utilizing the self structure, so that the damage to the switch rail caused by the direct contact of a lifting appliance or a construction tool and the rail bottom of the switch rail is avoided on the premise of not influencing the laying of the switch rail, the rail bottom of the switch rail is effectively protected, the quality of the rail bottom of the switch rail is improved, and the safety performance of the high-speed turnout is obviously improved.
(2) The slope of the first hook-shaped structure is 1 (2.76-13), the slope of the second hook-shaped structure is 1 (17-20), and the point rail bottom protective sleeve can be effectively and directly fixed on the rail bottom of the point rail without using other fixing devices, so that the point rail bottom protective sleeve cannot fall off in the point rail transportation and laying processes, and the purpose of protecting the point rail bottom is achieved.
(3) According to the invention, through setting the slope and width of the first hook-shaped structure and the second hook-shaped structure, the width of the bottom and the special height parameters of the first side wall and the second side wall, the switch rail bottom protective sleeve is suitable for different positions of the special-shaped structure of the switch rail bottom, and the switch rail bottom is integrally protected.
(4) The switch rail bottom protective sleeve suitable for different parts of the switch rail is prepared by adopting the mold and specific vulcanization conditions, and the preparation method is simple.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the tongue rail foot protective sleeve of the present invention.
Fig. 2 is a schematic view of the point rail foot protective sleeve of the present invention applied to a point rail foot.
In the figure: 1. the switch rail comprises a bottom, 2, a first side wall, 3, a second side wall, 4, a first hook-shaped structure, 5, a second hook-shaped structure, 6 and a switch rail bottom.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
Referring to fig. 1, a tongue rail foot protecting sleeve comprises a bottom 1, wherein a first side wall 2 and a second side wall 3 are respectively and vertically arranged at two ends of the bottom 1, and the first side wall 2 and the second side wall 3 are arranged at the same side of the bottom 1; a first hook-shaped structure 4 and a second hook-shaped structure 5 are respectively arranged at one end of the first side wall 2 and one end of the second side wall 3, which are far away from the bottom 1, the first hook-shaped structure 4 and the second hook-shaped structure 5 respectively extend from one ends of the first side wall 2 and the second side wall 3 to the direction of the central line of the bottom 1, and the extended end parts are at one side far away from the bottom 1;
the inclination of the first hook-shaped structure 4 is 1: 2.76; the inclination of the second hook-shaped structure 5 is 1: 17; the width of the first hook-shaped structure 4 is 10 mm; the width of the second hook-shaped structure 5 is 70 mm; the width of the bottom part 1 is 120 mm; the height of the first side wall 2 is 23.3 mm; the height of the second side wall 3 is 20 mm; the length of the switch rail bottom protective sleeve is 25 m.
The point rail base protective sleeve can be used in the range from the point to the point rail base with the width of about 120 mm.
Example 2
A switch rail bottom protective sleeve comprises a bottom 1, wherein a first side wall 2 and a second side wall 3 are respectively and vertically arranged at two ends of the bottom 1, and the first side wall 2 and the second side wall 3 are arranged on the same side of the bottom 1; a first hook-shaped structure 4 and a second hook-shaped structure 5 are respectively arranged at one end of the first side wall 2 and one end of the second side wall 3, which are far away from the bottom 1, the first hook-shaped structure 4 and the second hook-shaped structure 5 respectively extend from one ends of the first side wall 2 and the second side wall 3 to the direction of the central line of the bottom 1, and the extended end parts are at one side far away from the bottom 1;
the inclination of the first hook-shaped structure 4 is 1: 13; the inclination of the second hook-shaped structure 5 is 1: 17; the width of the first hook-shaped structure 4 is 10 mm; the width of the second hook-shaped structure 5 is 10 mm; the width of the bottom part 1 is 130 mm; the height of the first side wall 2 is 20 mm; the height of the second side wall 3 is 21.2 mm; the length of the switch rail bottom protective sleeve is 20 m.
The point rail bottom protective sleeve can be used at the point rail bottom width of 120 plus 130mm and the elastic bendable section at the rear end of the point.
Example 3
A switch rail bottom protective sleeve comprises a bottom 1, wherein a first side wall 2 and a second side wall 3 are respectively and vertically arranged at two ends of the bottom 1, and the first side wall 2 and the second side wall 3 are arranged on the same side of the bottom 1; a first hook-shaped structure 4 and a second hook-shaped structure 5 are respectively arranged at one end of the first side wall 2 and one end of the second side wall 3, which are far away from the bottom 1, the first hook-shaped structure 4 and the second hook-shaped structure 5 respectively extend from one ends of the first side wall 2 and the second side wall 3 to the direction of the central line of the bottom 1, and the extended end parts are at one side far away from the bottom 1;
the inclination of the first hook-shaped structure 4 is 1: 13; the inclination of the second hook-shaped structure 5 is 1: 20; the width of the first hook-shaped structure 4 is 50 mm; the width of the second hook-shaped structure 5 is 60 mm; the width of the bottom part 1 is 138 mm; the height of the first side wall 2 is 20.9 mm; the height of the second side wall 3 is 20 mm; the length of the switch rail bottom protective sleeve is 0.01 m.
The switch rail bottom protective sleeve can be used at the rail bottom within the range of 130 mm-the whole section of the width of the switch rail bottom.
Example 4
A switch rail bottom protective sleeve comprises a bottom 1, wherein a first side wall 2 and a second side wall 3 are respectively and vertically arranged at two ends of the bottom 1, and the first side wall 2 and the second side wall 3 are arranged on the same side of the bottom 1; a first hook-shaped structure 4 and a second hook-shaped structure 5 are respectively arranged at one end of the first side wall 2 and one end of the second side wall 3, which are far away from the bottom 1, the first hook-shaped structure 4 and the second hook-shaped structure 5 respectively extend from one ends of the first side wall 2 and the second side wall 3 to the direction of the central line of the bottom 1, and the extended end parts are at one side far away from the bottom 1;
the inclination of the first hook-shaped structure 4 is 1: 13; the inclination of the second hook-shaped structure 5 is 1: 17; the width of the first hook-shaped structure 4 is 40 mm; the width of the second hook-shaped structure 5 is 70 mm; the width of the bottom part 1 is 150 mm; the height of the first side wall 2 is 20 mm; the height of the second side wall 3 is 20 mm; the length of the switch rail bottom protective sleeve is 50 m.
The switch rail bottom protective sleeve can be used at the whole section of the switch rail.
Example 5
The point rail bottom protective sleeves described in embodiments 1 to 4 are respectively used at different positions of a point rail bottom, the point rail bottom protective sleeve of embodiment 1 is used at a point rail bottom from a point rail tip to a point rail bottom with a width of about 120mm, the point rail bottom protective sleeve of embodiment 2 is used at a point rail bottom with a width of 120 plus 130mm and a tip rear end elastically bendable section, the point rail bottom protective sleeve of embodiment 3 is used at a point rail bottom with a width of 130 mm-a whole section, the point rail bottom protective sleeve of embodiment 3 is used at a whole section of a point rail, and the number of the point rail bottom protective sleeves is determined according to actual needs of the point rail bottom. The use steps are as follows:
as shown in fig. 2, the first hook-shaped structure 4 is firstly passed through one side of the tongue rail bottom 6, the rail bottom of one side of the tongue rail bottom 6 is sleeved into the first side wall 2, the second hook-shaped structure 5 is then passed through the other side of the tongue rail bottom 6, the rail bottom of the tongue rail bottom 6 of the other side is sleeved into the second side wall 3, the protective sleeve can wrap the whole tongue rail bottom 6, and the tongue rail bottom 6 is fixed in the protective sleeve by the first hook-shaped structure 4 and the second hook-shaped structure 5.
The four switch rail bottom protective sleeves are used for different positions of the switch rail bottom, the switch rail bottom with the special-shaped structure can be integrally protected and protected, the protective sleeves cannot fall off or influence the laying of the switch rails in the subsequent switch rail transportation and laying process, tools are prevented from directly contacting the switch rails, damage to the switch rails in the construction process can be avoided, and the switch rail bottom is effectively protected.
Example 6
The preparation method of the tongue rail bottom protective sleeve described in the above embodiment 1 to embodiment 2 includes the following steps:
(1) banburying: taking rubber TB as a raw material, pressing for 55 seconds, discharging the filler weighed by an auxiliary machine, feeding the filler into an internal mixing chamber, carrying out internal mixing to 100 +/-5 ℃, rising a lump and exhausting gas for two times, continuing the internal mixing, opening a discharging door to discharge the rubber when the rubber discharge temperature reaches 158 +/-6 ℃, and feeding the rubber material into a first-floor open mill;
(2) open mixing: adjusting the roller distance of the first mill to ensure that the thickness of the sheet is 5 +/-1 mm, feeding the rubber material in the first mill into the first mill through a discharge cylinder, uniformly adding sulfur and a zinc dimethyldithiocarbamate accelerant when the temperature of the rubber sheet is less than or equal to 110 ℃, collecting and returning the rubber material in a coil, passing through the coil for 1 time, and conveying the rubber material to a second mill through a belt conveyor to carry out second mill; adjusting the roller spacing to ensure that the thickness of the sheet is 3 +/-1 mm, introducing the rubber material sent by one belt conveyor into the roller space, after the left and right half-width rubber swinging is carried out for 4 times, sending the rubber material to a three-way open mill through the belt conveyor for three-way open milling, and discharging the sheet after the roller wrapping, wherein the thickness is 12mm, and the width is 800 mm; cutting the milled rubber plate by using a rubber material slitting (separating) machine, wherein the slitting width is 120mm, and the slitting length is 160 mm;
(3) and (3) vulcanization: placing the cut rubber plate into a mold with corresponding specification, starting a mold closing program after a mold cavity is placed, starting vulcanization timing after exhausting, vulcanizing for 10min at 157 ℃ and 15Mpa, opening the mold and taking out a product to obtain the switch rail bottom protective sleeve;
the vulcanized product is not allowed to have unfilled corners with the volume larger than one third of one foot on positioning corners at two ends, and the working surface is free of unfilled corners; the working surface should not have an area larger than 9mm caused by impurities, bubbles, water marks and stuffiness2Or a single defect with a depth greater than 1 mm; the working surface is free of sponge-like objects, and the volumes of the sponge-like objects on the four positioning feet are not more than one third of the feet;
(4) trimming: and trimming the obtained switch rail bottom protective sleeve, wherein the trimming requirement is as follows: the flash is not more than 3 mm.
Example 7
The preparation method of the tongue rail bottom protective sleeve according to the embodiment 3 to the embodiment 4 comprises the following steps:
(1) banburying: taking rubber Q/CR as a raw material, pressing the rubber for 30s for the first time, placing filler and small ingredients into an internal mixing chamber for internal mixing, and when the temperature rises to 152 ℃, continuously performing internal mixing after the pressure lump rises and falls once; when the temperature reaches 158 +/-6 ℃, removing the rubber, feeding the rubber into an open mill for discharging, standing for more than or equal to 12 hours, and preparing for secondary mixing; after the rubber and the auxiliary materials are mixed for the second time and are pressed for 55 seconds, when the mixture is internally mixed to 100 +/-5 ℃, the mixture is lifted and exhausted for the first time, the mixture is continuously internally mixed, when the rubber discharging temperature reaches 127 +/-6 ℃, a discharging door is opened to discharge the rubber, and the rubber enters a first-floor one-way open mill to be milled;
(2) open mixing: adjusting the roller distance of the first mill to ensure that the thickness of the sheet is 5 +/-1 mm, feeding the rubber material in the first mill into the first mill through a discharge cylinder, uniformly adding sulfur and a zinc dimethyldithiocarbamate accelerant when the temperature of the rubber sheet is less than or equal to 110 ℃, collecting and returning the rubber material in a coil, passing through the coil for 1 time, and conveying the rubber material to a second mill through a belt conveyor to carry out second mill; adjusting the roller spacing to ensure that the thickness of the sheet is 3 +/-1 mm, introducing the rubber material sent by one belt conveyor into the roller space, after swinging the rubber for 4 times in a left-right half-width mode, sending the rubber material to a three-way open mill through a belt conveyor for three-way open milling, and discharging the sheet after wrapping the rollers, wherein the thickness is 12mm, and the width is 700 mm; cutting the milled rubber plate by using a rubber material slitting (separating) machine, wherein the slitting width is 100mm, and the slicing length is 150 mm;
(3) and (3) vulcanization: placing the cut rubber plate into a mold with corresponding specification, starting a mold closing program after a mold cavity is placed, starting vulcanization timing after exhausting, vulcanizing for 8min at the temperature of 178 ℃ and under the pressure of 20Mpa, opening the mold and taking out a product to obtain the switch rail bottom protective sleeve;
the vulcanized product is not allowed to have unfilled corners with the volume larger than one third of one foot on positioning corners at two ends, and the working surface is free of unfilled corners; the working surface should not have an area larger than 9mm caused by impurities, bubbles, water marks and stuffiness2Or a single defect with a depth greater than 1 mm; the working surface is free of sponge-like objects, and the volumes of the sponge-like objects on the four positioning feet are not more than one third of the feet;
(4) trimming: and trimming the obtained switch rail bottom protective sleeve, wherein the trimming requirement is as follows: the flash is not more than 3 mm.
Test example 1
The tongue rail base protective sleeve described in embodiments 1 to 4 is subjected to shore a hardness, tensile strength, elongation at break and 200% stress at break tests, wherein the tests are performed according to methods of GB/T531 and GB/T528, and the test results are shown in table 1:
table 1 table of performance test results
From the above table, the switch rail bottom protective sleeve of the invention has better mechanical property, when being used for the switch rail bottom, the invention not only avoids the damage to the switch rail caused by the direct contact between a lifting appliance or a construction tool and the switch rail bottom, but also effectively protects the rail bottom of the switch rail, improves the quality of the switch rail bottom and obviously improves the safety performance of a high-speed turnout.
In conclusion, the switch rail bottom protective sleeve disclosed by the invention can be suitable for the special-shaped structure of the switch rail bottom and integrally protect the switch rail bottom. The protective sleeve is directly fixed on the rail bottom of the switch rail by utilizing the self structure, so that the damage to the switch rail caused by the direct contact of a lifting appliance or a construction tool and the rail bottom of the switch rail is avoided on the premise of not influencing the laying of the switch rail, the rail bottom of the switch rail is effectively protected, the quality of the rail bottom of the switch rail is improved, and the safety performance of the high-speed turnout is obviously improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
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| CN202111307918.7A CN113914149A (en) | 2021-11-05 | 2021-11-05 | Switch rail bottom protective sleeve and preparation method and application thereof |
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| CN202111307918.7A CN113914149A (en) | 2021-11-05 | 2021-11-05 | Switch rail bottom protective sleeve and preparation method and application thereof |
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