CN217127882U - Track fastener for urban rail transit underground line - Google Patents

Abstract

The utility model discloses a track fastener for urban rail transit underground line belongs to fixed rail strip field on sleeper or the analog. The utility model comprises a fastener backing plate arranged under the steel rail, wherein the fastener backing plate comprises a rail lower backing plate, a rail lower heightening backing plate, an iron backing plate lower heightening backing plate and an insulating buffer backing plate which are arranged in sequence from top to bottom, and the iron backing plate is provided with two groups of pressing devices and two groups of anchoring devices in line symmetry; the pressing device comprises a pressing bolt arranged on the iron base plate and an elastic strip clamped between a limiting gasket sleeved on the pressing bolt and the iron base plate; the anchoring device comprises an anchoring bolt, and the anchoring bolt is connected with an embedded sleeve poured in the sleeper; the iron base plate with the height adjusted downwards is provided with a transverse insertion groove and a longitudinal insertion groove. The utility model discloses an in-line arrangement mode's track fastener is applicable to the narrow and small space of urban rail transit underground line, and the rail supports evenly, extension rail life.

Description

Track fastener for urban rail transit underground line

Technical Field

The utility model belongs to fixed rail strip field on sleeper or analog, concretely relates to track fastener for urban rail transit underground line.

Background

In recent years, the urban rail transit operation mileage in China is increasing continuously, and by the end of 2020, 244 urban rail transit operation lines with total length of 7969.7 kilometers are opened in 45 cities in China, wherein 6280.8 kilometers are subway operation lines, and the urban rail transit operation lines still have a trend of rising year by year.

Along with the continuous increase of the length and the operation age of the urban rail transit operation line, the frequency of rail diseases such as rail abrasion, uneven settlement of the rail and the like is higher and higher, and the workload of maintenance and repair of work is larger and larger. The track gauge and the height adjustment amount of the existing fastener are small; when the iron seat heightening base plate is replaced, the whole set of fasteners need to be detached, the replacement is troublesome, and the maintenance workload is increased.

According to the arrangement mode of the fastener anchor bolt and the elastic strip, the bolt fastener is mainly divided into an in-line arrangement mode and a staggered arrangement mode. The bullet strip of fastener fixed rail is arranged to inline for the rail bilateral symmetry, rail atress symmetry, rail internal stress is less, and the fastener width is less, for the special district of railway roadbed for example: the fastener arrangement of segments such as civil air defense door, pump house, horizontal ditch is more nimble, and the rail supports evenly can not be because of these special segments local increase and local increase rail atress. The fasteners are arranged in the staggered mode, and the anchoring bolts and the elastic strips are arranged along the direction of the steel rail, so that the length of the fasteners is small. The section of the railway underground line tunnel is large, and the fasteners are mostly arranged in an in-line mode due to the fact that space is not limited; urban rail transit underground line adopts little shield structure more, and the track is located circular shield structure's bottom, and the space is narrow and small, and the stagger arrangement mode is adopted more to present fastener, and consequently, the both sides bullet strip of fixed rail is asymmetric, and rail atress is asymmetric, increases rail internal stress, and sectors such as civil air defense door, pump house, cross-trench, the increase of fastener interval local increase rail atress, aggravation rail disease and maintenance work load.

SUMMERY OF THE UTILITY MODEL

The utility model provides a overcome the shortcoming that exists among the prior art and propose, its purpose provides an urban rail transit is in-line arrangement track fastener for underground line.

The utility model discloses a realize through following technical scheme:

a rail fastener for an underground line of urban rail transit comprises a fastener base plate arranged below a steel rail, wherein the fastener base plate comprises a rail lower base plate, a rail lower heightening base plate, an iron base plate lower heightening base plate and an insulating buffer base plate which are sequentially arranged from top to bottom; the pressing device comprises a pressing bolt arranged on the iron base plate and an elastic strip clamped between a limiting gasket sleeved on the pressing bolt and the iron base plate; the anchoring device comprises an anchoring bolt penetrating through an iron base plate, an iron base plate lower-lifting base plate and an insulating buffer base plate, and the anchoring bolt is connected with a pre-buried sleeve poured in a sleeper at the lower part of the steel rail; the iron base plate lower elevation base plate is also provided with a transverse insertion groove and a longitudinal insertion groove for an anchoring bolt to penetrate through.

In the technical scheme, the iron base plate comprises an iron base plate main body and iron base plate installation portions symmetrically arranged on two sides of the iron base plate main body, the rail lower base plate is arranged on the iron base plate main body, and the iron base plate installation portions on two sides of the iron base plate main body are symmetrically provided with the preformed holes for installing the anchoring bolts.

In the technical scheme, the grooves are uniformly arranged on the two side surfaces of the rail lower base plate in a staggered manner.

In the technical scheme, the compression bolt is a T-shaped bolt, the T-shaped bolt is clamped in a clamping groove formed in the iron plate, and a rotary blocking table is further arranged in the clamping groove to prevent the T-shaped bolt from rotating.

In the technical scheme, a heavy spring washer and a flat cushion block are arranged between the anchor bolt and the iron base plate, and the bottom of the flat cushion block and the hole periphery of the preformed hole in the iron base plate are provided with teeth which are matched and have uniform sizes.

In the technical scheme, the preformed hole is a long round hole.

In the technical scheme, an L-shaped insulating track gauge block is arranged between the elastic strip and the steel rail, and the insulating track gauge block comprises 4 specifications with the difference of 2mm from large thickness to small thickness.

In the technical scheme, the two ends of the lower rail backing plate are also provided with gauge block avoiding grooves.

In the above technical scheme, the shape and the iron tie plate phase-match of iron tie plate height reduction backing plate, including iron tie plate height reduction backing plate main part and symmetry set up in iron tie plate height reduction backing plate installation department under the iron tie plate height reduction backing plate of iron tie plate height reduction backing plate main part both sides, the opposite side that links to each other the side of height reduction backing plate installation department and iron tie plate height reduction backing plate main part is provided with the opening under the iron tie plate horizontal insertion groove, the adjacent side that links to each other the side of height reduction backing plate installation department and iron tie plate height reduction backing plate main part is provided with the opening under the iron tie plate vertical insertion groove.

In the technical scheme, after the width of the opening of the longitudinal insertion groove is larger than that of the opening of the transverse insertion groove so that the transverse insertion groove is clamped into the anchor bolt on one side, the iron base plate is rotated to lower the height of the iron base plate so that the longitudinal insertion groove can be clamped into the anchor bolt on the other side.

The utility model has the advantages that:

(1) the utility model discloses an adopt small-size bullet strip and arrange T type bolt and anchor bolt compactification, realized urban rail transit underground line narrow and small space fastener in-line arrangement mode, reduced rail internal stress, reduce the fastener width simultaneously, be favorable to district's fasteners such as people's air defense door, pump house, cross trench to arrange, the rail supports evenly can not local increase, reduces the rail disease, extension rail life.

(2) The utility model can realize double gauge adjustment by the design of arranging the insulation gauge blocks with different thicknesses and the teeth between the iron backing plate and the flat backing plate, thereby improving the gauge adjustment amount and accuracy; through setting up different thickness specifications and rail height adjusting backing plate and iron seat height adjusting backing plate down, realize dual height adjustment volume, the height adjustment volume of height-adjusting rail makes things convenient for uneven settlement district height adjustment.

(3) The utility model discloses the design of the horizontal insertion groove and the vertical insertion groove of the backing plate of increaseing under the iron tie plate can realize changing or increase and decrease the increase backing plate under the condition of not dismantling whole set fastener, reduces the work maintenance work volume.

Drawings

Fig. 1 is a schematic top view of the present invention;

fig. 2 is a schematic structural view of the front view of the present invention;

FIG. 3 is a schematic top view of the iron backing plate of the present invention;

fig. 4 is a schematic top view of the iron tie plate of the present invention with the tie plate raised downward;

fig. 5 is a schematic structural view of the under-rail pad of the present invention.

Wherein:

1. a rail lower pad, 101, a groove,

102. a gauge block avoiding groove, 2, an iron base plate,

201. an iron shim plate main body 202, an iron shim plate mounting part,

203. a preformed hole, 204, a clamping groove,

205. a rotary baffle table, 3. an iron base plate is arranged on the lower part of the upper adjusting base plate,

301. a transverse insertion slot, 302, a longitudinal insertion slot,

303. a main body of the iron base plate with a height adjusted downwards, 304. an installation part of the iron base plate with a height adjusted downwards

4. An insulating buffer backing plate, 5, a pressing device,

501. a compression bolt, 502, a spring bar,

503. a limit gasket, 6, an anchor bolt,

7. embedding a sleeve, 8, lowering a high backing plate under a rail,

9. a heavy duty spring washer, 10, a flat pad,

11. teeth, 12, an insulating gauge block,

13. a steel rail.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be further described by the following detailed description with reference to the accompanying drawings.

Example 1:

a rail fastener for an underground line of urban rail transit comprises a fastener base plate arranged below a steel rail 13, wherein the fastener base plate comprises a rail lower base plate 1, an iron base plate 2, an iron base plate lower heightening base plate 3 and an insulating buffer base plate 4 which are sequentially arranged from top to bottom, two groups of pressing devices 5 and two groups of anchoring devices are symmetrically arranged in line on the iron base plate 2, the pressing devices 5 symmetrically press two sides of the steel rail 13, and the anchoring devices are symmetrically arranged on the outer sides of the pressing devices 5; the pressing device 5 comprises a pressing bolt 501 arranged on the iron base plate 2 and an elastic strip 502 clamped between a limiting gasket 503 sleeved on the pressing bolt 501 and the iron base plate 2; the anchoring device comprises an anchoring bolt 6 penetrating through an iron base plate 2, an iron base plate lower elevation base plate 3 and an insulation buffer base plate 4, and the anchoring bolt 6 is connected with an embedded sleeve 7 poured in a sleeper at the lower part of a steel rail 13; the center points of the two compression bolts 501 and the two anchor bolts 6 are all located on the same straight line; the iron tie plate lower heightening tie plate 3 is also oppositely provided with a transverse insertion groove 301 and a longitudinal insertion groove 302 for the anchor bolt 6 to pass through.

The application provides a track fastener for an underground line of urban rail transit, wherein a pressing device 5 and an anchoring device are arranged on a fastener base plate in a straight line shape, elastic strips 502 for fixing a steel rail 13 are bilaterally symmetrical relative to the steel rail, the stress of the steel rail is symmetrical, and the internal stress of the steel rail is reduced; meanwhile, the linear arrangement is in a straight line shape, so that the width of the track fastener provided by the application is reduced compared with the width of the track fastener used for the staggered arrangement of the underground lines of the conventional urban rail transit, the distance between the fasteners is fixed according to the specification requirement, the reduction of the width of the fastener is beneficial to the arrangement of fasteners in sections such as civil air defense doors, pump rooms, transverse ditches and the like, the steel rail is uniformly supported without being locally increased, and the internal stress of the steel rail is reduced; further, the utility model provides a track fastener for urban rail transit underground line still includes the iron tie plate height-regulating backing plate under being equipped with horizontal insertion groove 301 and longitudinal insertion groove 302, and horizontal insertion groove 301 and longitudinal insertion groove 302 make iron tie plate height-regulating backing plate 3 all have spacingly along line direction and perpendicular line direction down, can guarantee the stability of height-regulating backing plate, make the rail atress more steady, further reduce rail internal stress.

Further, the arrangement of cooperation inline, the iron tie plate 2 includes that iron tie plate main part 201 and symmetry set up in the iron tie plate installation department 202 of iron tie plate main part 201 both sides, rail underlay plate 1 sets up on iron tie plate main part 201, the iron tie plate installation department 202 symmetry of iron tie plate main part 201 both sides is equipped with preformed hole 203 in order to install anchor bolt 6.

Further strengthen the adjustment rail height and play the effect of vibration damping and making an uproar, still be equipped with rail down between rail backing plate 1 and the iron tie plate 2 and increase backing plate 8, the crisscross align to grid of the both sides face of rail backing plate 1 has recess 101 to obtain best shock attenuation effect.

Further, the compression bolt 501 is a T-shaped bolt, a T-shaped head of the T-shaped bolt is clamped in a clamping groove 204 formed in the iron plate, and a rotary blocking table 205 is further arranged in the clamping groove 204 to prevent the T-shaped bolt from falling off, so that the elastic strip is not easy to fall off and is more stable; the limiting washer 503 is provided with a fastening nut for fixing.

Example 2:

on the basis of the embodiment 1, further, in order to enhance the track gauge maintaining capability of the fastener, a heavy spring washer 9 and a flat cushion block 10 are arranged between the anchor bolt 6 and the iron base plate 2, and the bottom of the flat cushion block 10 and the hole periphery of the preformed hole 203 on the iron base plate 2 are provided with teeth 11 which are matched and have uniform sizes, so that the effects of accurately moving distance, fixing the position of the iron base plate 2 and increasing the occlusion force are achieved; the distance between adjacent teeth 11 is 3mm, and the rail gauge adjustment of 3mm grade can be realized by moving the flat cushion block 10; meanwhile, in order to facilitate the adjustment of the anchor bolt 6, the prepared hole 203 is configured as an oblong hole, which ensures that the anchor bolt 6 can only move in a direction perpendicular to the steel rail 13.

In order to further increase fastener gauge adjustment volume, be equipped with the insulating gauge block 12 of L type between bullet strip 502 and the rail, in actual use, for the convenience of accurate adjustment, insulating gauge block 12 includes 4 specifications that differ 2mm in proper order from big to little thickness, through the insulating gauge block 12 of the different thickness of adjustment rail left and right sides, realizes the gauge adjustment volume of 2mm one grade: -8mm to +4 mm.

Through the track gauge adjustment of the two modes, the track gauge adjustment amount can be finally realized: -20mm to +16 mm.

The insulating gauge block 12 to the L type is further adjusted the rail down heightening backing plate 1, the both ends of the rail down backing plate 1 are also provided with gauge blocks avoiding grooves 102, so that the both ends of the rail down backing plate 1 can be connected with the baffle arranged on the iron backing plate 2 at a fixed position, and meanwhile, the insulating gauge block 12 of the L type is arranged in the gauge blocks avoiding grooves 102, so that the use is not influenced and the fixation of the rail down backing plate 1 is further strengthened. The technical scheme of this sample application is when giving consideration to the adjustment gauge, has also further strengthened the stability of fastener.

Example 3:

on the basis of embodiment 1, the shape of iron tie plate heightening backing plate 3 down and iron tie plate 2 phase-match, iron tie plate heightening backing plate 3 down includes iron tie plate heightening backing plate main part 303 and symmetry sets up in iron tie plate heightening backing plate installation department 304 under the iron tie plate heightening backing plate main part 303 both sides, the opposite side of the side that links to each other of horizontal insertion groove 301 heightening backing plate installation department 304 under the iron tie plate and iron tie plate heightening backing plate main part 303 is provided with the opening, vertical insertion groove 302 is provided with the opening in the adjacent side that links to each other of iron tie plate heightening backing plate installation department 304 under the iron tie plate and iron tie plate heightening backing plate main part 303, and during the use, it can to make anchor bolt 6 insert horizontal insertion groove 301 and vertical insertion groove 302 respectively from corresponding opening part.

In order to facilitate the installation of workers in a limited time if settlement is found in the case that the flat-day maintenance time is 3 to 4 hours at night in actual work, it is further considered that after the width of the opening of the longitudinal insertion groove 302 is larger than the width of the opening of the lateral insertion groove 301 so that the lateral insertion groove 301 is caught in the anchor bolt 6 on one side, the iron shim plate 3 is rotated to raise the iron shim plate so that the longitudinal insertion groove 302 is caught in the anchor bolt 6 on the other side. When the iron tie plate heightening tie plate 3 is replaced or increased or decreased in this way, the iron tie plate 2 is lifted by a certain height only by loosening the anchor bolt 6 without detaching the iron tie plate, so that the anchor bolt 6 on one side is inserted into the transverse insertion groove 301, and then the iron tie plate heightening tie plate 3 is rotated by 90 degrees, so that the anchor bolt 6 on the other side can be inserted into the longitudinal insertion groove 302, and the replacement or increase or decrease of the iron tie plate heightening tie plate 3 can be realized without detaching the whole set of fasteners.

Example 4

The technical scheme of the application is currently paved and applied in a certain urban rail transit project through an assembly test and an assembly fatigue test.

The in-line arrangement mode is adopted for the first time in urban rail transit underground lines, subway tunnels are particularly shield-driven, the space is narrow, the track installation space is limited, and the fasteners are generally longer in the arrangement of a straight line, so that the fasteners are arranged in a staggered manner. In the fastener arranged in the straight line type in-line manner in the technical scheme, elastic strips meeting the national standard are used, and through mechanics checking calculation and trial-manufacture experiments, under the condition of meeting safety margin, the total width of the two elastic strips 502 accounts for 36% of the total length of the iron base plate 3, the width of the steel rail 13 accounts for 34% of the length of the iron base plate 2, and therefore the width of the elastic strips 502 is a key quantity for controlling the length of the iron base plate 2, and the length of the fastener can be effectively shortened by adopting small elastic strips, so that the requirement of an urban rail transit underground line is met; meanwhile, the T-shaped bolts and the anchor bolts 6 are compactly arranged, the length of the whole fastener is controlled to be 452mm, the laying of sleepers and a track bed at the lower part of the fastener in the subway shield tunnel is not influenced, the laying of the subway minimum shield is met, and the mounting and use method is suitable for the mounting and use of the whole track bed of the subway tunnel.

The assembly test results show that: the close adhesion of each part is good, the track gauge expansion amount is +4.0mm and is less than 6mm which is required by the specification, and the requirement is met.

The assembly fatigue test result shows that: warp 3X 10 ⁶ After the secondary load cycle, no damage was seen to the parts.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims (9)

1. The utility model provides a track fastener for urban rail transit underground line, is including installing the fastener backing plate under rail (13), the fastener backing plate includes from last to down heightening backing plate (8) under the rail that sets gradually, iron tie plate (2), iron tie plate heightening backing plate (3) and insulating buffering backing plate (4), its characterized in that: the iron base plate (2) is provided with two groups of pressing devices (5) and two groups of anchoring devices in an in-line symmetrical mode, the pressing devices (5) symmetrically press two sides of a steel rail (13), and the anchoring devices are symmetrically arranged on the outer sides of the pressing devices (5); the pressing device (5) comprises a pressing bolt (501) arranged on the iron base plate (2) and an elastic strip (502) clamped between a limiting gasket sleeved on the pressing bolt (501) and the iron base plate (2); the anchoring device comprises an anchoring bolt (6) penetrating through an iron base plate (2), an iron base plate lower heightening base plate (3) and an insulating buffer base plate (4), and the anchoring bolt (6) is connected with an embedded sleeve (7) poured in a sleeper at the lower part of a steel rail (13); the iron base plate lower heightening base plate (3) is also provided with a transverse insertion groove (301) and a longitudinal insertion groove (302) for an anchoring bolt (6) to penetrate through;

the iron base plate height-adjusting base plate (3) comprises an iron base plate height-adjusting base plate main body (303) and iron base plate height-adjusting base plate installation parts (304) symmetrically arranged on two sides of the iron base plate height-adjusting base plate main body (303), openings are formed in opposite sides, located on the connecting sides, of the iron base plate height-adjusting base plate installation part (304) and the iron base plate height-adjusting base plate main body (303), of the transverse insertion groove (301), and openings are formed in the adjacent sides, located on the connecting sides, of the iron base plate height-adjusting base plate installation part (304) and the iron base plate height-adjusting base plate main body (303), of the longitudinal insertion groove (302);

the width of the opening of the longitudinal insertion groove (302) is larger than that of the opening of the transverse insertion groove (301) so that after the transverse insertion groove (301) is clamped into the anchor bolt (6) on one side, the iron base plate lower-adjusting height-adjusting base plate (3) is rotated to clamp the longitudinal insertion groove (302) into the anchor bolt (6) on the other side.

2. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: iron backing plate (2) include iron backing plate main part (201) and symmetry set up in iron backing plate installation department (202) of iron backing plate main part (201) both sides, rail lower bolster (1) sets up on iron backing plate main part (201), iron backing plate installation department (202) symmetry of iron backing plate main part (201) both sides be equipped with preformed hole (203) in order to install anchor bolt (6).

3. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: grooves (101) are uniformly arranged on the two side faces of the rail lower backing plate (1) in a staggered mode.

4. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: the pressing bolt (501) is a T-shaped bolt, the T-shaped bolt is clamped in a clamping groove (204) formed in an iron plate, and a rotary blocking table (205) is further arranged in the clamping groove (204) to prevent the T-shaped bolt from rotating.

5. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: a heavy spring washer (9) and a flat cushion block (10) are arranged between the anchor bolt (6) and the iron base plate (2), and teeth (11) which are matched and have uniform sizes are arranged at the bottom of the flat cushion block (10) and the periphery of a hole (203) reserved in the iron base plate (2).

6. The track fastener for the urban rail transit underground line according to claim 5, wherein: the prepared hole (203) is arranged to be a long round hole.

7. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: an L-shaped insulating track gauge block (12) is arranged between the elastic strip (502) and the steel rail, and the insulating track gauge block (12) comprises 4 specifications with the difference of 2mm from large to small in thickness.

8. The track fastener for the urban rail transit underground line according to claim 7, wherein: and track gauge block avoiding grooves (102) are also formed in the two ends of the lower rail base plate (1).

9. The track fastener for the urban rail transit underground line according to claim 1, characterized in that: the shape of the iron base plate lower heightening base plate (3) is matched with that of the iron base plate (2).

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