阅读说明：本技术 重载铁路有螺栓扣件系统 (Bolt fastener system for heavy haul railway ) 是由 冯毅 袁宝军 雷洁 孙云涛 王鹏 于 2020-12-15 设计创作，主要内容包括：一种重载铁路有螺栓扣件系统,包括混凝土轨枕,所述混凝土轨枕顶面具有两个混凝土挡肩,所述混凝土挡肩内侧预埋第一铁座,使所述第一铁座之间形成承轨槽,所述承轨槽用于承载和安装钢轨或所述钢轨轨底的铁垫板；所述第一铁座上部外侧面为向线路外侧倾斜的斜面,所述混凝土挡肩内侧面为与所述斜面倾斜角度一致的斜坡,且所述斜坡与所述斜面浇筑在一起；所述第一铁座上方通过T型螺栓副安装有ω形弹条,所述第一铁座内侧设置有轨距块,并通过ω形弹条扣压轨距块,使轨距块扣压在钢轨的轨肢上或钢轨轨底的铁垫板上。特别适合于40吨及以上大轴重重载铁路使用。(A bolt fastener system for a heavy haul railway comprises a concrete sleeper, wherein the top surface of the concrete sleeper is provided with two concrete retaining shoulders, first iron bases are embedded in the inner sides of the concrete retaining shoulders, a rail bearing groove is formed between the first iron bases and is used for bearing and mounting a steel rail or an iron base plate at the bottom of the steel rail; the outer side surface of the upper part of the first iron seat is an inclined surface inclined towards the outer side of a line, the inner side surface of the concrete retaining shoulder is a slope with the inclination angle consistent with that of the inclined surface, and the slope and the inclined surface are poured together; omega-shaped elastic strips are arranged above the first iron base through a T-shaped bolt pair, a gauge block is arranged on the inner side of the first iron base, and the gauge block is buckled and pressed through the omega-shaped elastic strips, so that the gauge block is buckled and pressed on rail limbs of the steel rail or an iron base plate at the bottom of the steel rail. Is particularly suitable for large-axle heavy-load railways of 40 tons or more.)

1. The utility model provides a heavy haul railway has bolt fastener system, includes concrete sleeper (1), its characterized in that: the top surface of the concrete sleeper (1) is provided with two concrete retaining shoulders (2), first iron bases (3) are embedded in the inner sides of the concrete retaining shoulders (2), a rail bearing groove (12) is formed between the first iron bases (3), and the rail bearing groove (12) is used for bearing and installing a steel rail (8) or an iron base plate (15) at the rail bottom of the steel rail (8); the outer side face of the upper part of the first iron seat (3) is an inclined face (9) inclined towards the outer side of a line, the inner side face of the concrete retaining shoulder (2) is a slope (13) with the inclination angle consistent with that of the inclined face (9), and the slope (13) and the inclined face (9) are poured together; omega-shaped elastic strips (6) are installed above the first iron base (3) through T-shaped bolt pairs (4), track gauge blocks (7) are arranged on the inner side of the first iron base (3), and the track gauge blocks (7) are buckled through the omega-shaped elastic strips (6), so that the track gauge blocks (7) are buckled and pressed on rail limbs of the steel rail (8) or iron base plates (19) at the rail bottom of the steel rail (8).

2. The heavy haul railway bolted fastener system of claim 1, wherein: the first iron seat (3) is of a T-shaped structure and comprises a head structure (14) and a lower structure (15), the head structure (14) is used for mounting the T-shaped bolt pair (4) and the omega-shaped elastic strip (6), the lower structure is used for embedding, the inclined plane (9) is located on the outer side of the head structure (14), and an included angle alpha between the inclined plane (9) and the horizontal plane is 100-130 degrees.

3. The heavy haul railway bolted fastener system of claim 2, wherein: and a flange (10) extends outwards from the upper end of the inclined plane (9) horizontally, the flange (10) and the concrete retaining shoulder (2) are poured together, and the top surface of the flange (10) is flush with the top surface of the concrete retaining shoulder (2).

4. The heavy haul railway bolted fastener system of claim 1, 2 or 3, wherein: the upper part of the inner side of the first iron seat (3) is provided with a boss (11), and the top surface of the boss (11) is flush with the top surface of the end part of the rail bearing groove (12).

Technical Field

The invention belongs to the technical field of railway fastener systems, and particularly relates to a bolt fastener system for a heavy haul railway.

Background

Heavy-duty railways have been widely valued by countries in the world due to their large capacity, high efficiency and low transportation cost. The fastener system is one of the important components of a heavy haul railway track structure, and plays an important role in keeping track gauge and enhancing the stability of the track structure. The bolt fastener system is widely popular because the bolt fastener system has the capability of adjusting the height position of the steel rail, and the fastening pressure can be recovered through retightening after the fastening pressure of the elastic strip is attenuated, thereby greatly facilitating the maintenance operation of the line.

At present, the most fastener system adopted by domestic 30T axle load heavy haul railways mainly comprises T-shaped bolts, nuts, flat washers, elastic strips, gauge blocks, gauge baffles, rail lower base plates and pre-buried first iron bases. But the fastener system has more parts, high production and manufacturing cost and complex assembly and disassembly.

Be applicable to among the prior art 35 ~ 45T gross rail load on axle have bolt fastener system (CN108625233A) by T type bolt, the nut, the plain washer, the bullet strip, the gauge block, rail lower bolster and pre-buried first iron seat are constituteed, bury pre-buried first iron seat in advance on the concrete foundation, install T type bolt fastening bullet strip on the pre-buried first iron seat, set up the gauge block between rail and pre-buried first iron seat, the adjustment of position about the rail is carried out through the gauge block of changing different thickness simultaneously, then set up rail lower bolster under the rail, provide fastener system's elasticity. The fastener system cancels a gauge baffle, and simplifies the structure of the fastener, is convenient to install and maintain and reduces the manufacturing cost by optimizing the dovetail groove design of the pre-embedded first iron seat. However, the outer side of the upper section of the embedded first iron seat of the fastener system is still suspended, so that the outer side of the head position of the fixed elastic strip of the embedded first iron seat is short of transverse support, the transverse stress point position of the head position of the embedded first iron seat is lower, the embedded first iron seat is weak in transverse impact resistance under the condition of large axle load of 45 tons or more, and the overall stability and the service life of the fastener system are seriously affected.

Disclosure of Invention

The invention provides a bolt fastener system for a heavy haul railway, which moves the position of a transverse stress point of the head of an embedded first iron seat upwards by optimizing the matching relation of the embedded first iron seat and a sleeper, thereby achieving the purposes of improving the stress condition of the fastener system, prolonging the integral stability and the service life of the fastener system and meeting the application condition of the heavy haul railway.

The technical solution of the invention is as follows: a bolt fastener system for a heavy haul railway comprises a concrete sleeper, wherein the top surface of the concrete sleeper is provided with two concrete retaining shoulders, first iron bases are embedded in the inner sides of the concrete retaining shoulders, a rail bearing groove is formed between the first iron bases and is used for bearing and mounting a steel rail or an iron base plate at the bottom of the steel rail; the outer side surface of the upper part of the first iron seat is an inclined surface inclined towards the outer side of a line, the inner side surface of the concrete retaining shoulder is a slope with the inclination angle consistent with that of the inclined surface, and the slope and the inclined surface are poured together; omega-shaped elastic strips are arranged above the first iron base through a T-shaped bolt pair, a gauge block is arranged on the inner side of the first iron base, and the gauge block is buckled and pressed through the omega-shaped elastic strips, so that the gauge block is buckled and pressed on rail limbs of the steel rail or an iron base plate at the bottom of the steel rail.

Further, the first iron seat is of a T-shaped structure and comprises a head structure used for mounting the T-shaped bolt pair and the omega-shaped elastic strip and a lower structure used for embedding, the inclined plane is located on the outer side of the head structure, and an included angle alpha between the inclined plane and the horizontal plane is 100-130 degrees.

Furthermore, a flange extends outwards horizontally at the upper end of the inclined plane, and is poured together with the concrete retaining shoulder, and the top surface of the flange is flush with the top surface of the concrete retaining shoulder.

Furthermore, a boss is arranged on the upper portion of the inner side of the first iron seat, and the top surface of the boss is flush with the top surface of the end portion of the rail bearing groove.

Compared with the prior art, the invention has the advantages that: through improving sleeper top shape, optimizing the cooperation relation of pre-buried first iron seat head structure and pre-buried first iron seat and sleeper, the head position outside that makes the fixed bullet strip of pre-buried first iron seat has horizontal support, and then makes the horizontal stress point in pre-buried first iron seat head position shift up, improves the ability that pre-buried first iron seat resisted horizontal impact, and then improves the overall stability and the life of fastener system. Is particularly suitable for large-axle heavy-load railways of 40 tons or more.

Drawings

Figure 1 is a schematic structural view of the present invention,

FIG. 2 and FIG. 3 are schematic structural views of a first iron seat of the present invention,

FIG. 4 is a schematic structural view of the T-bolt of the present invention.

Figure 5 is a perspective view of the gauge block of the present invention,

figure 6 is a schematic structural view of a second embodiment of the present invention,

figure 7 is a structural sectional view of the iron shim plate of figure 6,

fig. 8 is a top view of the construction of the iron shim plate of fig. 6.

Detailed Description

A first embodiment of the invention is described below with reference to figures 1, 2, 3, 4 and 5.

A bolt fastener system for a heavy haul railway comprises a concrete sleeper 1, wherein two concrete retaining shoulders 2 are arranged on the top surface of the concrete sleeper 1, first iron bases 3 are pre-embedded on the inner sides of the concrete retaining shoulders 2, a rail bearing groove 12 is formed between the first iron bases 3, and the rail bearing groove 12 is used for bearing and mounting a steel rail 8; the outer side surface of the upper part of the first iron seat 3 is an inclined surface 9 inclined towards the outer side of the line, the inner side surface of the concrete retaining shoulder 2 is a slope 13 with an inclination angle consistent with that of the inclined surface 9, and the slope 13 and the inclined surface 9 are poured together; omega-shaped elastic strips 6 are mounted above the first iron base 3 through T-shaped bolt pairs 4, gauge blocks 7 are arranged between the inner side of the first iron base 3 and the steel rail 8, and the gauge blocks 7 are buckled and pressed through the omega-shaped elastic strips 6, so that the gauge blocks 7 are buckled and pressed on rail limbs of the steel rail 8.

Preferably, the first iron seat 3 is of a "T" shaped structure, and includes a head structure 14 for mounting the T-shaped bolt pair 4 and the ω -shaped elastic strip 6 and a lower structure 15 for pre-embedding, the inclined surface 9 is located outside the head structure 14, and an included angle α between the inclined surface 9 and a horizontal plane is 100-130 degrees. The outer side of the top surface of the head structure 14 is provided with an elastic strip mounting groove 16, and the inner part of the head structure is provided with a bolt mounting groove 17; the T-shaped bolt head of the T-shaped bolt pair 4 is sleeved in the bolt mounting groove 17, the stress surface of the T-shaped bolt head and the stress surface of the bolt mounting groove 17 are inverted conical surfaces, the omega-shaped elastic strip 6 is sleeved on the T-shaped bolt pair 4, one side of the omega-shaped elastic strip is located in the elastic strip mounting groove 16, and the other side of the omega-shaped elastic strip 6 is buckled on the track gauge block 7 by fastening the nut 5 on the T-shaped bolt pair 4. A flange 10 extends horizontally outwards from the upper end of the inclined plane 9, and the flange 10 and the concrete retaining shoulder 2 are poured together, so that the top surface of the flange 10 is flush with the top surface of the concrete retaining shoulder 2. The upper part of the inner side of the first iron seat 3 is provided with a boss 11, and the top surface of the boss 11 is flush with the top surface of the end part of the rail bearing groove 12. The gauge block 7 has a first groove 19 on the outside, and the inner end of the head structure 14 of the first iron seat 3 is embedded in the first groove 19, and the inner end of the gauge block 7 is buckled on the rail limb of the rail 8.

When in use, the rail lower backing plate 18 is arranged in the rail bearing groove 12, the steel rail 8 is arranged on the rail lower backing plate 18, and the steel rail 8 is buckled and pressed through the invention.

A second embodiment of the invention is described below with reference to fig. 2, 3, 4, 5, 6, 7, 8.

A bolt fastener system for a heavy haul railway comprises a concrete sleeper 1, wherein two concrete retaining shoulders 2 are arranged on the top surface of the concrete sleeper 1, first iron bases 3 are pre-embedded on the inner sides of the concrete retaining shoulders 2, a rail bearing groove 12 is formed between the first iron bases 3, and the rail bearing groove 12 is used for bearing and installing an iron base plate 15 at the bottom of a steel rail 8; the outer side surface of the upper part of the first iron seat 3 is an inclined surface 9 inclined towards the outer side of the line, the inner side surface of the concrete retaining shoulder 2 is a slope 1 with an inclination angle consistent with that of the inclined surface 9, and the slope 13 and the inclined surface 9 are poured together; and an omega-shaped elastic strip 6 is arranged above the first iron seat 3 through a T-shaped bolt pair 4.

Preferably, the first iron seat 3 is of a "T" shaped structure, and includes a head structure 14 for mounting the T-shaped bolt pair 4 and the ω -shaped elastic strip 6 and a lower structure 15 for pre-embedding, the inclined surface 9 is located outside the head structure 14, and an included angle α between the inclined surface 9 and a horizontal plane is 100-130 degrees. The outer side of the top surface of the head structure 14 is provided with an elastic strip mounting groove 16, and the inner part of the head structure is provided with a bolt mounting groove 17; the T-shaped bolt head of the T-shaped bolt pair 4 is sleeved in the bolt mounting groove 17, the stress surface of the T-shaped bolt head and the stress surface of the bolt mounting groove 17 are inverted conical surfaces, the omega-shaped elastic strip 6 is sleeved on the T-shaped bolt pair 4, one side of the omega-shaped elastic strip is located in the elastic strip mounting groove 16, and the other side of the omega-shaped elastic strip 6 is buckled on the track gauge block 7 by fastening the nut 5 on the T-shaped bolt pair 4. A flange 10 extends horizontally outwards from the upper end of the inclined plane 9, and the flange 10 and the concrete retaining shoulder 2 are poured together, so that the top surface of the flange 10 is flush with the top surface of the concrete retaining shoulder 2. The upper part of the inner side of the first iron seat 3 is provided with a boss 11, and the top surface of the boss 11 is flush with the top surface of the end part of the rail bearing groove 12.

The height-adjusting base plate 20 is arranged in the rail bearing groove 12, the iron base plate 21 is arranged on the height-adjusting base plate 20, the rail lower base plate 18 is arranged on the iron base plate 21, and the steel rail 8 is arranged on the rail lower base plate 18; second iron seat 22 has been welded respectively to iron tie plate 21 up end both sides, and also installs omega shape bullet strip 6 through the vice 4 of T type bolt on the second iron seat 22, be provided with gauge block 7 between the second iron seat 22 inboard and the rail 8, the gauge block 7 outside has first recess 19, and the inner embedding of second iron seat 22 in first recess 19, omega shape bullet strip 6 suit is on the vice 4 of T type bolt and its one side is located bullet strip mounting groove 16, makes omega shape bullet strip 6's the opposite side withhold on gauge block 7 through nut 5 on the vice 4 of fastening T type bolt, and the inner withhold of gauge block 7 is on the rail limb of rail 8.

The both ends of iron backing plate 21 have second recess 23 respectively, also be provided with gauge block 7 between the inboard and iron backing plate 21 of first iron stand 3, and the inner embedding of head structure 14 of first iron stand 3 in the first recess 19 to the lower extreme embedding of gauge block 7 in the second recess 23, prevent that the iron backing plate from drunkenness along the line direction. The omega-shaped elastic strip 6 is sleeved on the T-shaped bolt pair 4, one side of the omega-shaped elastic strip is positioned in the elastic strip mounting groove 16, the other side of the omega-shaped elastic strip 6 is buckled on the gauge block 7 by fastening the nut 5 on the T-shaped bolt pair 4, and the inner end of the gauge block 7 is buckled on the end part of the iron base plate 21.

According to the invention, the transverse force borne by the first iron seat from the steel rail or the iron base plate is transmitted to the concrete retaining shoulder 2 arranged on the concrete sleeper through the inclined surface 9 and the inclined surface 13, because the contact surface of the first iron seat and the concrete retaining shoulder is the inclined surface, the transverse force transmitted to the concrete sleeper by the first iron seat is decomposed into a vertical upward component force and a component force perpendicular to the inclined surface by the inclined surface, the component forces in two directions are changed by the change of the gradient of the inclined surface, and simultaneously, the vertical upward component force is offset by the uplift resistance generated after the embedded first iron seat is embedded in the sleeper, so that the concrete retaining shoulder 2 only bears the component force perpendicular to the inclined surface, the stress condition of the concrete retaining shoulder 2 is obviously optimized, the capability of the embedded first iron seat for resisting the transverse impact is improved, and the integral stability and the service life of the fastener system are further improved. Is particularly suitable for large-axle heavy-load railways of 40 tons or more. In addition, the inner side surface of the concrete retaining shoulder 2 is set into a slope, so that on one hand, demolding during sleeper manufacturing is facilitated, on the other hand, the space of a rail bearing groove at the top of the sleeper is increased, and on-site maintenance and curing of a fastener system are facilitated.

The flange 10 and the boss 11 are arranged in the invention, and mainly aim at positioning when the embedded first iron base is poured, and in addition, the flange 10 also has the function of further improving the transverse impact resistance of the embedded first iron base.

The inclination angle alpha formed by the slope 13 and the inclined surface 9 and the horizontal direction is selected to be 100-130 degrees, so that the concrete retaining shoulder 2 can provide enough lateral force support, a part of the lateral force is decomposed into vertical upward component force as far as possible, and the stress condition of the concrete retaining shoulder 2 is optimized to the maximum extent.

It should be noted that in the description of the present invention, the side close to the rail is referred to as the inner side or inner end, and the side away from the rail is referred to as the outer side or outer end.

The above-mentioned embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the scope of the invention, and therefore all equivalent variations made by the following claims should be included in the scope of the invention.