CN-224213048-U - Anti-loosening adjustable rail transit fastener system

Abstract

The utility model relates to the technical field of rail fasteners, in particular to a locking and retreating adjustable rail transit fastener system which comprises an elastic base plate arranged below a steel rail, elastic strips respectively arranged at the left side and the right side of the steel rail and used for stabilizing the steel rail, wherein one end of each elastic strip is indirectly buckled on the lower plane of the steel rail, the other end of each elastic strip is buckled on a gauge baffle, a sleeve pipe which penetrates through the elastic strips and the elastic base plate from top to bottom and is arranged in a matched mode with the hard metal structure is further included, the lower surface of the hard metal structure is provided with a cylindrical structure with spiral protrusions, the inner surface of the sleeve pipe is provided with spiral grooves with inverted triangle structures at equal intervals, the spiral grooves and the spiral protrusions can be tightly attached, and the fastener system is remarkably superior to the existing fastener system in the aspects of resonance resistance of the elastic strips, loose resistance of spiral spikes and rail adjustment capability, and effective improvement of rail stability, safety and maintenance economy.

Inventors

• XIAO JUNHENG
• ZHANG HUAN
• Cui Shukun
• WANG ZHAO
• WANG YUANSHUO
• MA DENGKE
• LI ZIRUI
• YAN ZIQUAN
• CAI SHISHENG
• SUN LINLIN
• LIU BINGTONG
• LI YANSHAN
• LIU CHANGXI
• WANG YAZHOU

Assignees

• 中国铁道科学研究院集团有限公司铁道建筑研究所
• 北京铁科首钢轨道技术股份有限公司
• 中国铁道科学研究院集团有限公司

Dates

Publication Date

20260508

Application Date

20250515

Claims (10)

1. 1. An anti-loosening adjustable rail transit fastener system comprises an elastic backing plate arranged below a steel rail and elastic strips respectively arranged at the left side and the right side of the steel rail and used for stabilizing the steel rail, and is characterized in that one end of each elastic strip is indirectly buckled on the lower plane of the steel rail, and the other end of each elastic strip is buckled on a gauge baffle; The hard metal structures respectively penetrate through the elastic strip and the elastic backing plate from top to bottom; the hard metal structure is an upper part, a middle part and a lower part which are integrally designed, wherein the upper part is a polygonal structure, the middle part is a cylindrical structure with a smooth surface, the lower part is a cylindrical structure with a spiral protrusion on the surface, the spiral protrusion is continuously wound on the lower part of the hard metal structure from top to bottom, the spiral protrusion is formed by two planes and a hard metal structure body, the two planes are connected by arc chamfer angles, and the spiral protrusion and the hard metal structure are integrally formed; The elastic sleeper comprises a hard metal structure, a sleeve, an elastic backing plate, an inner surface and an outer surface, wherein the sleeve is arranged in a matched mode with the hard metal structure, the sleeve is vertically arranged in a sleeper below the elastic backing plate, the upper end of the sleeve is in contact with the lower bottom surface of the elastic backing plate, spiral grooves with inverted triangle structures are arranged on the inner surface at equal intervals, the spiral grooves can be tightly attached to the spiral protrusions, and a plurality of regular or irregular grooves or protrusions are arranged on the outer surface of the sleeve.
2. 2. The system of claim 1, wherein the elastic strip is of a W-shaped arch symmetrical structure, side limbs are arranged on the outer two sides and middle limbs are arranged on the two sides of the center, the side limbs are connected with the middle limbs in an integrated arc mode, the height of the middle limb arch h 3 is larger than the height of the side limb arch h 2 and is larger than the elastic distance h 1 of the elastic strip, the width of the side limbs of the elastic strip is equal to the width of the middle limbs, straight line structures pointing to the top ends of the center arcs of the middle limbs are horizontally and symmetrically arranged on the two ends of the side limbs, and the natural frequency of the elastic strip is not smaller than 800Hz.
3. 3. The system of claim 1, further comprising a metal pad, wherein the metal pad is symmetrically provided with first round holes on the left and right sides, protruding structures are integrally arranged on the inner sides of the round holes, and the steel rail is placed in the middle of the protruding structures on the two sides.
4. 4. A system according to claim 3, wherein the circular hole is an oblong hole, and the ends of the two sides of the circular hole are provided with extension parts along the respective sides for increasing the wall thickness of the two sides of the metal backing plate.
5. 5. A system according to claim 3, wherein a rail lower shim plate is provided intermediate the metal shim plate and the rail, and two side lugs of the rail lower shim plate are penetrated for improving the longitudinal limiting ability of the rail lower shim plate along the rail.
6. 6. The system of claim 4, wherein the periphery of the elastic pad is the same as the periphery of the metal pad, and is provided with a second round hole which is the same as the first round hole, and a third round hole with a radius larger than that of the first round hole is arranged at the center of the elastic pad.
7. 7. The system of claim 1, further comprising an insulating gauge member between the spring strip and the rail, the insulating gauge member being of an L-shaped configuration, the spring strip being swaged to its upper surface and its inner surface being in close engagement with the rail.
8. 8. The system of claim 2, wherein any diagonal length of the polygon of the upper portion of the hard metal structure is greater than any diagonal length of the hollow portion of the central arc of the middle limb of the spring strip, and the upper portion of the hard metal structure is snapped onto the middle limbs on both sides of the central arc when the hard metal structure penetrates the central arc of the middle limb of the spring strip.
9. 9. A system according to claim 3, wherein a fine tuning shim plate is provided between the rail lower shim plate and the metal shim plate for adjusting the height position of the rail.
10. 10. The system of claim 1, wherein the gage baffle is a groove structure, a notch capable of being matched with the protrusions on two sides of the metal backing plate is arranged at the bottom of the gage baffle, and when the gage baffle is in contact with the metal backing plate, the protrusions on the end of the metal backing plate are matched with the notch to generate no acting force.

Description

Anti-loosening adjustable rail transit fastener system Technical Field The utility model belongs to the technical field of rail fasteners, and particularly relates to an anti-loosening adjustable rail transit fastener system. Background By the end of 2024, the operating mileage of high-speed railways in China reaches 4.8 ten thousand kilometers. The high-speed railway fastener system realizes the span development from no to excellent, and the comprehensive technical advantages are obviously improved. The fastener for the ballastless track in China mainly adopts a WJ-7 type fastener, a WJ-8 type fastener and a W300-1 type fastener. At present, the general service state of the high-speed railway fastener in China is good, the stability of the geometric state of the track can be effectively maintained, the requirements of the high-speed railway on the operation safety and the comfort can be ensured, and the maintenance workload of the fastener is less. However, due to the reasons of regions and climate conditions, maintenance and repair modes, construction quality, fastener production quality and the like, some damage problems caused by different fastener types are also found in the operation, and are classified as follows: (1) Elastic strip resonance fracture and injury problem Since 2011, individual high-speed railway circuits in China successively find that the problem of breaking of elastic strips of fasteners caused by rail wave grinding, motor train unit wheel polygons and the like, such as Beijing Shanghai high-speed railway in 2011, jingjin inter-city in 2012, wu Angao iron in 2015, jingjin high-speed railway in 2016 and the like, is continuously caused by the resonance damage of the elastic strips caused by periodic abrasion of wheel rails. The excitation frequency of the wheel rail is close to the natural frequency of the spring strip, typically in the range 550 to 650 hz. (2) Abnormal hammering loosening problem of screw spike In 2010, the Shanghon high-speed railway line accidentally discovers that the spike is withdrawn under abnormal hammering action in track fine tuning construction. The head of the screw spike is hammered vertically downwards with a hammer of about 2kg for about 1m in the field, the screw spike is loosened and the screw spike is rapidly rotated out. Similar problems have occurred in other high-speed rail fine tuning operations in 2019. (3) The problem of insufficient adjustment of the fastener Because of wide regions in China, complex geological conditions and different line construction quality, the deformation of partial high-speed rail section foundation is large, and the adjustment of the existing fasteners is difficult to meet the adjustment precision and maintenance requirements of special sections. The high-speed rail is one of the props of the modern traffic system of China, and has various important meanings for the economic and social development of China. Therefore, a rail fastening system capable of solving the above problems is a technical problem to be solved by those skilled in the art. Disclosure of utility model The object of the present utility model is to solve at least one of the above-mentioned technical problems. The technical scheme adopted by the utility model is as follows: The embodiment of the utility model provides an anti-loosening adjustable rail transit fastener system, which comprises an elastic backing plate arranged below a steel rail and elastic strips respectively arranged at the left side and the right side of the steel rail and used for stabilizing the steel rail, wherein one end of each elastic strip is indirectly buckled and pressed on the lower plane of the steel rail, and the other end of each elastic strip is buckled and pressed on a gauge baffle plate; The hard metal structures respectively penetrate through the elastic strip and the elastic backing plate from top to bottom; the hard metal structure is an upper part, a middle part and a lower part which are integrally designed, wherein the upper part is a polygonal structure, the middle part is a cylindrical structure with a smooth surface, the lower part is a cylindrical structure with a spiral protrusion on the surface, the spiral protrusion is continuously wound on the lower part of the hard metal structure from top to bottom, the spiral protrusion is formed by two planes and a hard metal structure body, the two planes are connected by arc chamfer angles, and the spiral protrusion and the hard metal structure are integrally formed; The elastic sleeper comprises a hard metal structure, a sleeve, an elastic backing plate, an inner surface and an outer surface, wherein the sleeve is arranged in a matched mode with the hard metal structure, the sleeve is vertically arranged in a sleeper below the elastic backing plate, the upper end of the sleeve is in contact with the lower bottom surface of the elastic backing plate, spiral grooves with inverted triangle structures are arranged on th