Concrete switch tie with retaining shoulder

Abstract

The utility model relates to a concrete switch tie with a retaining shoulder, a limit groove and a mounting hole are arranged on the top surface of the switch tie, in the projection direction, the limit groove is composed of two concentric arcs and oblique lines connected to two ends of the two concentric arcs, the circle centers of the two concentric arcs coincide with the intersection point of extension lines of the two oblique lines, and the mounting hole is arranged in the limit groove. The circle center of the mounting hole coincides with the circle center of the concentric arc, and the two arc-shaped side walls of the limiting groove gradually incline outwards in the direction from the groove bottom to the groove opening to form inclined blocking shoulders. The limiting groove is formed in the switch tie, wheel-rail force is transmitted to the switch tie limiting groove through a steel rail and a fastener, bolt stress can be effectively released, bearing capacity is larger, the structure is safer, a sleeve basically does not bear transverse force, the transverse stability of the structure is improved, and the service life of the switch tie is prolonged. The turnout maintenance cost is reduced, the maintenance period is prolonged, the driving safety is ensured, and the problem that the bolt and the sleeve are damaged, invalid and prominent is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of concrete frog, in particular to a kind of concrete frog with shoulder. BACKGROUND

[0002] At present, the domestic speed-up frog is all unified section prestressed concrete component, and only by the plastic sleeve embedded in frog, wheel rail force is transmitted to frog. When turnout passes laterally, due to small curve radius, the impact between wheel rail is large, and frog has higher requirement for resisting lateral force. However, plastic sleeve has small hardness and poor resistance, and is very easy to produce disease (such as sleeve is oval in the vertical direction of track), and with the increase of traffic volume, even frog bolt loosening, failure and breakage can be caused. When this disease occurs, drilling and reburying or changing sleeve to embedded iron base to resist lateral force transmitted by steel rail is necessary, but embedded iron base has root fracture risk, and has high cost. Therefore, how to improve the lateral resistance of frog and solve the problem of bolt and sleeve damage and failure is an urgent problem to be solved. SUMMARY

[0003] The utility model aims at providing a kind of concrete frog with shoulder, by being provided with limiting groove on frog, wheel rail force is transmitted to frog limiting groove through steel rail and fastener, the lateral load of sleeve is reduced, bolt stress can be effectively released, and the structure is safer.

[0004] To achieve the above object, the utility model provides a kind of concrete frog with shoulder, including prestressed reinforcement arranged in frog and along its length, stirrup arranged at intervals and steel mesh sheet arranged transversely at the end of the frog, limiting groove and mounting hole for mounting fastening bolt are arranged on the top surface of the frog, in projection direction, the limiting groove is composed of two concentric arcs and inclined line connected at both ends of two concentric arcs, the centers of two concentric arcs coincide with the extension line of two inclined lines, and the center of mounting hole coincides with the center of concentric arc;Two limiting grooves are symmetrically arranged to form a group of limiting grooves, and the two arc-shaped side walls of each limiting groove gradually incline outward from groove bottom to groove opening direction to form inclined shoulder.

[0005] Further, the inclination angle of the shoulder is α, wherein 100°≤α≤145°.

[0006] Further, in projection direction, the center of mounting hole coincides with the middle line M of width direction of rail tie.

[0007] Further, the reinforcing ribs are arranged along the lateral direction of the frog spacer, and the opening ends of the reinforcing ribs are provided with the lengthening ribs which are integrally formed with the reinforcing ribs and extend outward, and the L-shaped steel bars are fixedly connected to the bottom of the lengthening ribs.

[0008] Further, the force bearing rib is arranged at the bottom of the limiting groove in the frog spacer.

[0009] Further, the mounting hole is a reserved hole, and a plastic sleeve is embedded in the mounting hole.

[0010] Further, the spiral rib is arranged around the mounting hole in the frog spacer.

[0011] Compared with the prior art, the utility model has the following technical effects:

[0012] 1. The utility model discloses a limiting groove is arranged on the frog spacer, and the two sides of the limiting groove are arranged as arc-shaped inclined shoulders, so that the wheel rail force is transmitted to the limiting groove of the frog spacer through the rail and the fastener, the stress of the bolt can be effectively released, the bearing capacity is larger, the structure is safer, the sleeve basically does not bear the lateral force, the structure lateral stability is improved, the service life of the frog spacer is prolonged, the turnout maintenance cost is reduced, the maintenance period is prolonged, the driving safety is ensured, the problems of bolt and sleeve damage and failure are effectively solved.

[0013] 2. The limiting groove on the frog spacer is arranged as the arc-shaped side wall composed of two concentric arcs and the inclined end wall composed of two inclined lines, the receiving condition of the shoulder part is effectively improved, the contact area of the shoulder and the fastener pad is increased, the stress condition of the shoulder can be improved, the lateral force of the wheel rail force transmitted to the shoulder through the rail and the fastener is reduced, and the service life of the shoulder is prolonged.

[0014] 3. The reinforcing ribs are arranged around the limiting groove, the shear resistance of the shoulder to the impact force and the lateral force is improved, the occurrence of diseases of the shoulder is reduced, the maintenance is reduced, the service life is prolonged, and the setting of the reinforcing ribs can avoid cracks caused by stress when the frog spacer is demolded and stretched, the utility model has the advantages of ingenious design and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of this specification, for further understanding of the utility model, show the preferred embodiments of the utility model, and are used to explain the principle of the utility model together with the specification.

[0016] Figure 1 is a half sectional structure schematic diagram of the concrete frog with shoulder stop of the utility model,

[0017] Figure 2 is a top view structure schematic diagram of the concrete frog with shoulder stop of the utility model,

[0018] Figure 3 is a structure schematic diagram of the reinforcing rib of the concrete frog with shoulder stop of the utility model.

[0019] The meaning represented by the reference signs in the figure is: 1, limit slot, 2, mounting hole, 3, prestressed steel bar, 4, stirrup, 5, mesh, 6, reinforcing rib, 7, sleeve, 8, bearing rib, 9, spiral rib, 10, lengthening rib, 11, L-shaped steel bar, 12, hook. DETAILED DESCRIPTION

[0020] The embodiments of the utility model will be described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0021] The embodiments of the utility model will be described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0022] It should be noted that the terms used in the utility model are only for describing the specific embodiments, and are not intended to limit the example embodiments according to the application. As used in the utility model, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the utility model, it indicates the presence of the features, devices, components and / or their combinations.

[0023] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "length", "thickness", "upper", "lower", "lateral", "longitudinal", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] Embodiment: as Figure 1 and Figure 2As shown, the concrete frog of the present embodiment comprises prestressed steel bars 3 arranged in the frog and along the length of the frog, stirrups 4 arranged at intervals, and a transversely arranged steel mesh 5 arranged at the end of the frog, and a limiting groove 1 and a mounting hole 2 for mounting a fastening bolt are arranged on the top surface of the frog. In the present embodiment, the prestressed steel bars 3 are φ7mm spiral rib steel wires, the stirrups 4 are made of φ6mm low-carbon hot-rolled round disc bar stirrup bending, and the steel mesh 5 is made of spot-welded vertical bars of φ14mm and horizontal bars of φ6mm, and the horizontal bars and vertical bars of the steel mesh 5 are low-carbon cold-drawn steel wires. The mounting hole 2 is a reserved hole, and a plastic sleeve 7 is embedded in the mounting hole 2, and in the projection direction, the limiting groove 1 is composed of two concentric arcs and two inclined lines connected at the ends of the two concentric arcs, the centers of the two concentric arcs coincide with the intersection of the extensions of the two inclined lines, the center of the mounting hole 2 coincides with the center of the concentric arc in the projection direction, and the center of the mounting hole 2 coincides with the middle line M in the width direction of the sleeper, and the positions of the limiting groove 1 and the mounting hole 2 are designed in this way, so that the wheel-rail force can be transmitted to the two arc-shaped side walls of the limiting groove through the rail and the fastener, the bolt in the mounting hole can be effectively released, the bearing capacity is larger, the structure is safer, the sleeve in the mounting hole basically does not bear the transverse force, the transverse stability of the structure is improved, the service life of the frog is prolonged, the production cost of the turnout is reduced, the maintenance cycle is prolonged, and the safety of train operation is ensured.

[0025] In order to improve the bearing capacity of the mounting hole 2 and prevent cracks from occurring, a spiral rib 9 is arranged around the mounting hole 2, and the spiral rib 9 is placed in the position of the mounting hole 2 in the frog mold during the manufacturing of the frog, and the spiral rib 9 is integrated with the concrete.

[0026] The two limiting grooves 1 are symmetrically arranged to form a group of limiting grooves, and the frog of the present embodiment has two groups of limiting grooves 1, the two arc-shaped side walls of each limiting groove 1 gradually incline outward from the groove bottom to the groove opening to form an inclined shoulder 13, and a mounting hole 2 is reserved at the center of the arc-shaped side wall of each limiting groove in a group of limiting grooves 1, and in this way, the bolt for fixing the fastener is installed in the mounting hole 2 to fix the rail to the frog through the fastener system, and the track gauge, height, level, and track direction of the turnout are ensured, thereby meeting the requirements of the turnout area. The inclination angle of the shoulder 13 is α, and 100°≤α≤145°, and the inclination angle α is preferably 110° or 120°. The shoulder is designed as an inclined shoulder, which facilitates the installation of the fastener, different sizes of spacers can be used in a group of limiting grooves, which has better adaptability, and the shoulder is designed as an arc shape, which increases the contact area of the shoulder and the spacer block of the fastener, improves the stress condition of the shoulder, reduces the transverse force of the wheel-rail force transmitted to the shoulder through the rail and the fastener, and prolongs the service life of the shoulder.

[0027] As another embodiment of the utility model: on the basis of the above embodiment, it is additionally provided with reinforcing rib 6, specifically, reinforcing rib 6 is arranged at the position corresponding to limiting groove 1 in the frog sleeper, the shape of reinforcing rib 6 is matched with the cross-sectional shape of limiting groove 1, the shape of reinforcing rib 6 is substantially U-shaped with the opening size being greater than the bottom size, reinforcing rib 6 is arranged along the transverse direction of the frog sleeper, in the embodiment, as shown in Figure 1 Reinforcing rib 6 is arranged as two, two reinforcing ribs 6 are symmetrically arranged, reinforcing rib 6 is located at the periphery of limiting groove 1, the arrangement of reinforcing rib 6 can better improve the compressive strength of concrete, improve the performance of the shoulder in bearing impact force and transverse force, reduce the occurrence of its own diseases, reduce maintenance, prolong its service life, and the arrangement of reinforcing rib 6 can provide a supporting force for the shoulder part, avoid cracks due to stress when the frog sleeper is demoulded and released, and the design is ingenious and practical.

[0028] In the embodiment, the two ends of the opening of the reinforcing rib 6 are provided with an outwardly extending lengthening rib 7 which is an integral structure with the reinforcing rib 6, the bottom of the lengthening rib 7 is fixedly connected with an L-shaped steel bar 11, and the bottom of the L-shaped steel bar 11 is provided with a hook 12. The reinforcing rib 6 and the lengthening rib 7 φ6mm are formed by hoop bending of low-carbon hot-rolled disc strip, and the lengthening rib 7 is arranged to increase the bonding force between the reinforcing rib 6 and the concrete. The L-shaped steel bar 11 is fixedly connected with the reinforcing rib 6 by welding, and the bottom of the L-shaped steel bar is provided with a hook for facilitating binding connection with the prestressed steel bar. Such design not only ensures the position of the reinforcing rib 6 and prevents it from being displaced due to the impact of the concrete slurry during concrete pouring, but also forms an integral structure of the reinforcing rib 6 and the prestressed steel bar, effectively improving the stress performance of the limiting groove 1 part.

[0029] In other embodiments of the utility model, in order to improve the ability of the limiting groove to bear vertical load, a bearing rib 8 is arranged at the bottom of the limiting groove 1 in the frog sleeper, and the bearing rib 8 is a φ7mm steel bar.

[0030] The utility model discloses a limiting groove is arranged on the frog sleeper, the two sides of the limiting groove are provided with arc-shaped inclined shoulders, the wheel rail force is transmitted to the limiting groove of the frog sleeper through the rail and the fastener, the stress of the bolt can be effectively released, the bearing capacity is greater, the structure is safer, the sleeve basically does not bear the transverse force, the structure transverse stability is improved, the service life of the frog sleeper is prolonged, the production cost of the turnout is reduced, the maintenance cycle is prolonged, the driving safety is guaranteed, the problem of the prominent damage and failure of the bolt and the sleeve is effectively solved. Moreover, the limiting groove with the expanded opening is convenient for installing the fastener and is beneficial to construction, one set of limiting grooves comprises two symmetrically arranged limiting grooves, and a mounting hole is reserved on the center of the arc-shaped side wall of each limiting groove, which facilitates fixing the fastener and improves the ability of maintaining the track gauge.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A concrete frog with shoulder, comprising prestressed steel bars arranged in the frog and along its length, spacers arranged at intervals, and a transversely arranged steel mesh sheet arranged at the end of the frog, characterized in that, The limiting groove is composed of two concentric circular arcs and two slant lines connecting the two ends of the two concentric circular arcs in the projection direction, the centers of the two concentric circular arcs coincide with the intersection of the extensions of the two slant lines, and the center of the mounting hole coincides with the center of the concentric circular arc. The two limiting grooves are symmetrically arranged to form a set of limiting grooves, and the two arc-shaped side walls of each limiting groove gradually incline outward from the groove bottom to the groove opening to form an inclined shoulder.

2. The shoulder blocked concrete tie brier of claim 1, wherein, The inclined angle of the shoulder is α, wherein 100°≤α≤145°.

3. The shoulder blocked concrete switch tie tie as claimed in claim 1 or 2, characterized in that In the projection direction, the center of the mounting hole coincides with the middle line M of the width direction of the rail sleeper.

4. The shoulder blocked concrete tie brier of claim 3, wherein, The reinforcing rib is arranged in the frog sleeper corresponding to the limiting groove, the shape of the reinforcing rib matches the cross-sectional shape of the limiting groove, the reinforcing rib is arranged along the transverse direction of the frog sleeper, the opening ends of the reinforcing rib are provided with outwardly extending extension ribs which are integrally formed with the reinforcing rib, the bottom of the reinforcing rib is fixedly connected with an L-shaped steel bar, and the bottom of the L-shaped steel bar is provided with a hook.

5. The shoulder blocked concrete tie brier of claim 1 wherein, A force bearing rib is arranged in the frog sleeper at the bottom of the limiting groove.

6. The shoulder blocked concrete tie brier of claim 1 wherein, The mounting hole is a reserved hole, and a plastic sleeve is embedded in the mounting hole.

7. The shoulder blocked concrete tie brier of claim 1 wherein, Spiral ribs are arranged around the outside of the mounting hole.

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