Fabricated steel rail insulation reinforcing structure

Abstract

An assembly type steel rail insulation reinforcing structure is used for effectively reinforcing the insulation performance of the steel rail, improving the resistance to ground of the steel rail and effectively preventing stray current from being blocked from the source. An under-rail high-insulation pad is arranged between the bottom face of the steel rail and the plate face of the iron base plate, the two transverse sides of the under-rail high-insulation pad are each provided with a protruding part extending out of the rail bottom structure of the steel rail, the plate faces of the protruding parts on the two sides are each provided with an inserting groove and an arc-shaped groove which extend longitudinally, and the arc-shaped grooves correspond to the insulation gauge blocks on the same side in position. Insulation insertion pieces are fixedly installed on the under-rail high-insulation base plate faces through insertion grooves, insulation insertion piece bodies are provided with inner side vertical parts, outer side vertical parts and middle parts, the lower ends of the outer side vertical parts are provided with insertion parts matched with the insertion grooves, and the upper ends of the inner side vertical parts extend out of the top faces of the insulation rail gauge blocks by a certain height. The longitudinal side walls of the insulating gauge blocks are attached to the longitudinal end faces, on the sides, of the outer side vertical parts and the middle parts, and the inner walls of the outer side vertical parts and the inner walls of the middle parts are attached to the side walls of the lower portion of the rail bottom structure and the adjacent partial slopes.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to an assembled rail insulation reinforcement structure. Background Art

[0002] Urban rail transit generally adopts a DC traction power supply system. The current required by the train is provided by the traction substation, and the power is transmitted to the train through the contact network or contact rail. However, the rails are not completely insulated from the ground, and some current leaks from the rails, forming stray currents. Stray currents can cause serious electrochemical corrosion to rails, metal pipes, and structural steel bars, and even corrode and perforate metal pipes, and cause natural gas, oil, and other leaks, threatening the personal safety of nearby residents. In addition, stray currents may also trigger the operation of the DC frame protection device in the traction substation, causing large-scale power outages and seriously affecting the safe operation of urban rail transit.

[0003] In recent years, the newly promulgated industry standard "Technical Standard for Corrosion Protection of Stray Current in Subways" (CJJT49-2020) and the national standard "Specifications for Urban Rail Transit Engineering Projects" (GB55033-2022) have put forward higher requirements for the prevention and control of stray currents. Stray currents are generally controlled by "prevention as the main and drainage as the auxiliary". Among them, increasing the resistance of the rail to the ground can effectively "block" stray currents from the source, which is an effective method of stray current protection.

[0004] Among the existing measures to increase the resistance of rails to the ground, some are wrapped with rail insulation layers, that is, an additional insulating protective layer is fixed between the rail and the fastener by means of clips or bonding, which has a good effect on improving insulation performance, but this solution has problems such as the need to coat the insulating material with glue and bond it to the rail, high construction requirements, poor quality controllability, and difficulty in replacement; some are sprayed with rail surface insulating materials, that is, a layer of insulating layer is formed between the rail and the fastener by brushing the rail. Although it has little effect on the force transmission between the fastener and the rail, this solution has problems such as many construction processes, high rework rate, poor wear resistance, easy failure, and easy accumulation of pollutants on the surface leading to reduced insulation effect; some are vulcanized into one with the insulating material and the fastener components. Although it reduces the installation components and increases the insulation contact area, this solution affects the force transmission between the fastener and the rail, changes the original fastener structure and performance, and brings about problems such as increased fastener preparation costs, inconvenient replacement, and difficult operation and maintenance. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an assembled rail insulation reinforcement structure, so as to effectively enhance the insulation performance of the original rail-fastener system without affecting the overall performance of the original rail-fastener system, improve the rail-to-ground resistance, and effectively "block" stray current from the source.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] The utility model discloses an assembled rail insulation reinforcement structure, comprising a rail and an iron pad arranged below the rail, an insulating gauge block arranged at both lateral sides of the rail bottom structure, a fastener system fixes the iron pad on a rail bottom foundation, and acts on the insulating gauge block to buckle the rail, and is characterized in that a rail bottom high insulation pad is arranged between the rail bottom surface and the iron pad plate surface, the rail bottom high insulation pad has protrusions extending out of the rail bottom structure on both lateral sides, and longitudinally extending slots and arc grooves are arranged on the plate surfaces of the protrusions on both sides, The arc groove corresponds to the position of the insulating gauge block on the same side; an insulating plug is installed and fixed on the surface of the high insulating pad under the rail through a slot, and the insulating plug body has an inner upright portion, an outer upright portion and a middle portion, the lower end of the outer upright portion has a plug-in portion adapted to the slot, the upper end of the inner upright portion extends a certain height from the top surface of the insulating gauge block, the longitudinal side wall of the insulating gauge block is in contact with the longitudinal end surface of the outer upright portion and the middle portion on this side, and the inner wall of the outer upright portion and the middle portion is in contact with the lower side wall of the rail bottom structure and the adjacent partial inclined surface.

[0008] The beneficial effects of the utility model are mainly reflected in the following aspects:

[0009] 1. The force transmission process of the original rail-fastener system can remain unchanged. Compared with ordinary fasteners, only the rail pad is optimized, which is applicable to different urban rail transit engineering conditions;

[0010] 2. It can wrap the rails tightly and form a protective layer between the rails and the fasteners to effectively block stray currents. At the same time, the top structure of the insulating plug is a longitudinal eaves-like protrusion design, which can greatly increase the creepage distance and further enhance its insulation protection effect;

[0011] 3. Due to its T-groove plug-in assembly design, the insulating plug has the advantage of being difficult to fall off after installation, and the vibration generated during train operation will not directly act on the structure, which has high safety and durability;

[0012] 4. It has the characteristics of few parts and easy implementation. During installation, it only needs to assemble the insulating plug on the high insulating pad under the rail, which does not affect the construction process of the original rail-fastener system;

[0013] 5. The device has the characteristics of simple structure and easy maintenance. During operation, maintenance personnel can better observe the usage status. If any insulating plug is loose, they can simply knock on the end to strengthen the fit; if any insulating plug is damaged, it can be pulled out and replaced for maintenance; in addition, the removal and reinstallation of the fasteners are not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This specification includes the following nine drawings:

[0015] Figure 1 It is a longitudinal section view of an assembled rail insulation reinforcement structure of the utility model;

[0016] Figure 2 It is a top view of an assembled rail insulation reinforcement structure of the utility model;

[0017] Figure 3 It is a top view of a high insulating pad under the rail in an assembled rail insulation reinforcement structure of the utility model;

[0018] Figure 4 is along Figure 3 Sectional view along line AA;

[0019] Figure 5 yes Figure 4 The enlarged view of the part C in the middle;

[0020] Figure 6 yes Figure 4 The enlarged view of the part in middle D;

[0021] Figure 7 is along Figure 3 Sectional view along the midline BB;

[0022] Figure 8 It is a top view of an insulating insert in an assembled rail insulation reinforcement structure of the utility model;

[0023] Fig. 9 is along Figure 8 Cross-sectional view along line EE.

[0024] The figure shows the components and corresponding marks: rail 10, iron pad 11, elastic pad 12 under the plate, spring bar 21, insulating gauge block 22, anchor bolt 23, insulating plug 30, inner upright portion 31, outer upright portion 32, middle portion 33, plug-in portion 34, lateral outer protrusion 35, high insulating pad 40 under the rail, slot 41, arc groove 42, longitudinal limit boss 43. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Reference Figure 1 and Figure 2The utility model discloses an assembled rail insulation reinforcement structure, comprising a rail 10 and an iron pad 11 arranged thereunder, an insulating gauge block 22 arranged on both sides of the rail bottom structure of the rail 10, a fastener system fixes the iron pad 11 on the rail bottom foundation, and acts on the insulating gauge block 22 to buckle the rail 10. An under-plate elastic pad 12 is usually arranged between the iron pad 11 and the rail bottom foundation, and the fastener system includes a spring bar 21, an insulating gauge block 22 and an anchor bolt 23.

[0027] Reference Figures 1 to 9 A high insulating pad 40 is arranged under the rail between the bottom surface of the rail 10 and the surface of the iron pad 11. Both lateral sides of the high insulating pad 40 under the rail have protrusions extending out of the rail bottom structure of the rail 10. The plate surfaces of the protrusions on both sides are provided with longitudinally extending slots 41 and arc grooves 42, wherein the arc grooves 42 correspond to the positions of the insulating gauge blocks 22 on the same side. The insulating plug 30 is installed and fixed on the plate surface of the high insulating pad 40 under the rail through the slot 41. The insulating plug 30 has an inner vertical part 31, an outer vertical part 32 and a middle part 33. The lower end of the outer vertical part 32 has a plug-in part 34 adapted to the slot 41. The upper end of the inner vertical part 31 extends a certain height from the top surface of the insulating gauge block 22. The longitudinal side wall of the insulating gauge block 22 is in contact with the longitudinal end surface of the outer vertical part 32 and the middle part 33 on this side. The inner wall of the outer vertical part 32 and the middle part 33 is in contact with the lower side wall of the rail bottom structure and the adjacent part of the inclined surface. Compared with the ordinary rail-fastener system, the entire embodiment has a unique insulating plug 30, which can cooperate with the high insulating pad 40 under the rail to form a reinforced insulation structure to increase the rail resistance to the ground.

[0028] Reference Figure 2 The insulating insert 30 cooperates with the insulating gauge block 22 to form an effective insulating package for the rail 10 and increase the creepage distance, which greatly improves the insulation performance of the original rail-fastener system. Moreover, since the original size structure of the insulating gauge block 22 is not changed, the overall performance of the fastener can be kept consistent, and it has a wide range of applicability to urban rail transit lines under different engineering conditions.

[0029] Reference Figures 3 to 6 The high insulating pad 40 under the rail is a square plate of a certain thickness. Compared with the rail pad of the ordinary fastener, it is appropriately widened. The widened part is provided with a slot 41 and an arc groove 42. The arc groove 42 has a certain compression rebound performance and can be in close contact with the bottom surface of the insulating track gauge block 22. As a preferred embodiment, the cross section of the slot 41 is an inverted T shape. Fig. 9 The shape and size of the plug-in portion 34 are adapted thereto, so that the insulating plug 30 has the advantage of being difficult to fall off by itself after installation, and the vibration generated when the train is running will not directly act on the structure, which has higher safety and durability.

[0030] Reference Figure 8 and Fig. 9 The insulating insert 30 is a sheet-shaped body that fits the bottom structure of the rail 10, with an overall thickness of 2 to 3 mm and a longitudinal length of 200 mm to 250 mm, which can form an effective insulation barrier between the rail and the fastener. The upper end of the inner vertical portion 31 has a transverse outer protrusion 35, which is an eaves-like protrusion structure, which can increase the creepage distance and improve the insulation performance.

[0031] Reference Figure 4 To facilitate installation and prevent the high insulating pad 40 under the rail from longitudinal movement, the two longitudinal ends of the high insulating pad 40 under the rail have longitudinal limit bosses 43 extending downward from the bottom surface, and the spacing of the longitudinal limit bosses 43 is adapted to the longitudinal length of the iron pad 11.

[0032] Reference Figure 1 and Figure 2 After the rail-fastener system is installed normally, the insulating plug 30 can be assembled on the high insulating pad 40 under the rail. Compared with ordinary fasteners, fewer new parts are added, the construction is simple, and it is convenient for maintenance personnel to check and disassemble and replace in the later operation stage. The specific installation process is as follows: After the rail 10, the high insulating pad 40 under the rail, the insulating gauge block 22, the spring bar 21, the anchor bolt 23, the iron pad 11, the elastic pad 12 under the plate, etc. are installed in sequence, first check and adjust the position of the high insulating pad 40 under the rail to ensure that it is aligned with the center of the bottom structure of the rail 10, then check the slots 41 and the arc grooves 42 on both sides of the high insulating pad 30 under the rail to ensure that the grooves are clean and free of debris, and finally correctly assemble the plug-in part 34 of the insulating plug 30 into the slot 41, and knock it with a tool to make it fit tightly with the insulating gauge block 22.

[0033] During operation, maintenance personnel can better observe the use status of the insulating plug 30. If the insulating plug 30 is loose, they can simply knock the end to strengthen it. If the insulating plug 30 is damaged, it can be pulled out and replaced for maintenance. In addition, the removal and reinstallation of the fastener are not affected.

[0034] The above description is only to illustrate some principles of the assembled rail insulation reinforcement structure of the utility model, and is not intended to limit the utility model to the specific structure and applicable scope shown and described. Therefore, all corresponding modifications and equivalents that may be used belong to the patent scope applied for by the utility model.

Claims

1. An assembled rail insulation reinforcement structure, comprising a rail (10) and an iron pad (11) arranged below the rail, an insulating gauge block (22) arranged on both sides of the rail bottom structure of the rail (10), a fastener system fixes the iron pad (11) on the rail bottom foundation, and acts on the insulating gauge block (22) to buckle the rail (10), wherein: A high insulating pad (40) under the rail is arranged between the bottom surface of the steel rail (10) and the surface of the iron pad (11), and both lateral sides of the high insulating pad (40) under the rail have protrusions extending out of the rail bottom structure of the steel rail (10), and the surfaces of the protrusions on both sides are provided with slots (41) and arc grooves (42) extending longitudinally, wherein the arc grooves (42) correspond to the positions of the insulating track gauge blocks (22) on the same side; an insulating plug (30) is installed and fixed on the surface of the high insulating pad (40) under the rail through the slots (41), and the insulating plug (30) is provided with a slot (41) extending longitudinally from the bottom surface of the steel rail (10). The body comprises an inner upright portion (31), an outer upright portion (32) and a middle portion (33); the lower end of the outer upright portion (32) comprises a plug-in portion (34) matched with a slot (41); the upper end of the inner upright portion (31) extends a certain height above the top surface of the insulating gauge block (22); the longitudinal side wall of the insulating gauge block (22) is in contact with the longitudinal end surfaces of the outer upright portion (32) and the middle portion (33) on the side; the inner walls of the outer upright portion (32) and the middle portion (33) are in contact with the lower side wall of the rail bottom structure and the adjacent part of the inclined surface.

2. The assembled rail insulation reinforcement structure according to claim 1, characterized in that: The upper end of the inner upright portion (31) has a transverse outer protrusion (35).

3. The assembled rail insulation reinforcement structure according to claim 1, characterized in that: The cross-section of the slot (41) and the plug-in portion (34) is in an inverted T shape.

4. The assembled rail insulation reinforcement structure according to claim 1, characterized in that: The insulating insert (30) has an overall thickness of 2 to 3 mm and a longitudinal length of 200 mm to 250 mm.

5. The assembled rail insulation reinforcement structure according to claim 1, characterized in that: The longitudinal ends of the under-rail high insulation pad (40) are provided with longitudinal limiting bosses (43) extending downward from the bottom surface, and the spacing between the longitudinal limiting bosses (43) is adapted to the longitudinal length of the iron pad (11).

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