CN217266656U

CN217266656U - Steel rail stray current protection device

Info

Publication number: CN217266656U
Application number: CN202221584413.5U
Authority: CN
Inventors: 王晓丽
Original assignee: Beijing Capital Railway Chuanglian Technology Co Ltd
Current assignee: Beijing Capital Railway Chuanglian Technology Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-08-23
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a steel rail stray current protection device, which comprises a steel rail and a plurality of groups of protection devices arranged on the steel rail at intervals, wherein waterproof and anticorrosive layers are respectively coated on the steel rail and the plurality of groups of protection devices; each group of protection devices comprises 2 insulation track gauge blocks and 1 insulation track lower base plate; the lower backing plate of the insulated rail is arranged at the lower end of the steel rail; 2 insulating gauge blocks are respectively inserted into two end sides of the lower backing plate of the insulating rail and are respectively buckled and pressed on two sides of the steel rail; the front edge of the position where the 2 insulating gauge blocks are buckled, pressed and contacted with the steel rail is provided with an antifouling eaves blocking structure. The coating of the utility model has good anti-scratch performance, simple construction process, low production cost, better waterproof and anticorrosion effects and better insulating property; the installation of the product is the same as the assembly and use of a common fastener, and the construction quality is easy to meet; the utility model discloses correspond the product because efficiency of construction is comparatively unanimous with ordinary fastener, simplified the construction process of corresponding product, also promoted stray current protection system's installation, maintenance efficiency by a wide margin.

Description

Steel rail stray current protection device

Technical Field

The utility model relates to a track engineering power supply and stray current prevention and cure technical field, the more specifically rail stray current protector that says so relates to.

Background

For a wheel-rail system using direct current for traction power supply, when the running rail is used as a return line to be connected with the negative electrode of the substation, traction current flows back to the substation through the running rail. The walking rail is connected with the track bed board in a fastener supporting mode, when the fastener cannot be completely insulated, partial current inevitably flows out of the track bed due to the existence of potential difference between the fastener and the track bed, and then the walking rail enters the environment around the rail. According to the characteristics of metal electrochemical corrosion, metal components in the environment into which current flows are inevitably corroded, and the larger the amount of current, the larger the corrosion amount, and the higher the corrosion speed.

Although there is a clear requirement for the insulation performance of the fastener at the beginning of construction, after the line runs for a period of time, the overall insulation performance of the fastener is obviously deteriorated due to the influence of various factors in the environment, and the situation is especially obvious for the line running for many years. According to a large amount of measured data, the transition resistance value of the steel rail to the ground in a part of lines is far smaller than 15 omega-km (scheme III) required by technical standard for subway stray current corrosion protection (CJJ/T49-2020), and some more extreme lines are even smaller than 1 omega-km, and the insulation performance is almost completely lost. Improvements to these situations include both the introduction of measures to strengthen the rail insulation at the beginning of the design and the development of replacement measures which are easy to implement for already operating lines and which must also strengthen the insulation properties of the rail.

In some prior art measures for enhancing the insulation of the rail, an insulation layer is formed between the rail and the fastener by painting the rail. Still others wrap the rail at a location corresponding to the clip. The insulating layer is made of materials with good insulating property, and the materials are made into sheets to wrap or adhere on the steel rail. These approaches essentially add a high-insulation isolation layer outside the existing fastener insulation system, and connect a high resistance in series from the viewpoint of circuit simplification, and these measures have proved to be a feasible solution for improving the insulation performance of the rail. However, the above measures add a layer of physical structure in the existing fastener system from the point of view of the stress of the fastener system, which has adverse effects on the interaction between the steel rail and the fastener system, such as increasing the longitudinal resistance, reducing the friction force, and the like, and also have the problem of difficult construction. The measures are arranged on the steel rail in a brushing or cold bonding mode, in order to enhance the adhesive force between the steel rail and the steel rail, the steel rail is generally required to be derusted by using some special equipment, and the brushing or cold bonding can be completed at one time, so that the construction procedures are more, the whole construction period is longer, and the large-scale use or the replacement of an operating line is difficult. And the existing measures for strengthening the rail insulation do not adopt any waterproof and anticorrosion measures.

Therefore, it is one of the technical problems to be solved in the art to provide a rail stray current protection device with excellent insulation performance and good waterproof and corrosion-resistant properties.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the problems mentioned in the background art, the present invention provides a steel rail stray current protection device.

In order to solve the technical problem, the utility model discloses following technical scheme has been taken:

a steel rail stray current protection device comprises a steel rail and a plurality of groups of protection devices arranged on the steel rail at intervals, wherein waterproof and anticorrosive layers are coated on the steel rail and the plurality of groups of protection devices;

each group of the protection devices comprises 2 insulation track gauge blocks and 1 insulation track lower base plate; the lower insulating rail pad plate is arranged at the lower end of the steel rail; the 2 insulation gauge blocks are respectively inserted into two end sides of the lower base plate of the insulation rail and are respectively buckled and pressed on two sides of the steel rail; and 2, an antifouling eaves blocking structure is arranged on the front edge of the buckling and pressing contact position of the insulating gauge block and the steel rail.

Preferably, the insulating gauge block is in plug-in fit with the insulating rail lower backing plate so as to realize the sealing connection between the insulating gauge block and the insulating rail lower backing plate; and after the installation is finished, contact deformation exists between the insulating gauge block and the insulating rail lower backing plate.

Preferably, the waterproof and anticorrosive layer comprises a zinc-rich coating and an organic sealing layer which are sequentially coated on the steel rail and the protection device.

Preferably, the organic sealing layer can also be selected from a pigment paint layer, and the color of the pigment paint layer is any one of gray, blue and black, so that the railway signal is not influenced and interfered.

Preferably, the antifouling eaves blocking structure is arranged on one side of the insulating gauge block in the width direction; correspondingly, a gap matched with the insulating track gauge block is formed in the width direction of the insulating track lower base plate; and the length difference between the notch and the insulating track gauge block is more than 2 times of the predicted movement amount of the insulating track lower base plate.

Preferably, the lower surface of the notch is one of an inclined surface, a U-shaped surface, a convex surface or an arc-shaped surface; the lower surface of the insulating gauge block is in contact with the lower surface of the notch and generates certain deformation to realize sealing connection.

Preferably, the two ends of the insulating gauge block along the length direction of the steel rail are provided with plug connectors; correspondingly, inserting grooves are formed in two ends of the notch in the lower base plate of the insulating rail; the insulating gauge block and the insulating rail lower backing plate are connected with the inserting groove in an inserting mode through the matching of the inserting joint.

Preferably, the antifouling eaves blocking structure is a protrusion arranged on the insulating gauge block; the bulge is positioned on one side far away from the notch, and the bulge is in an upright or bent shape; the projections serve to isolate a path for current to be conducted along the outer surface of the insulating gage block due to contaminant accumulation.

Preferably, the positions of the upper surfaces of the connecting plugs at the two ends of the insulating gauge block are provided with covering parts; and the covering part completely covers the lower backing plate of the insulating rail.

Preferably, the length of the lower tie plate of the insulated rail exceeds two side edges of the sleeper of the steel rail in the length direction of the steel rail.

Preferably, the lower end of the lower backing plate of the insulated rail is provided with a lower side plate; and an iron base plate is coated on the side surface of the lower side plate.

Preferably, the insulating rail lower backing plate is provided with edge wrapping parts corresponding to two side surfaces of the steel rail, and the edge wrapping parts are of vertical or arc structures; and the top end of the edge wrapping part is provided with an eave type structure.

The utility model discloses for prior art gain following technological effect:

1) the coating of the utility model has good anti-scratch performance, simple construction process, low production cost, better waterproof effect, anticorrosion effect and insulating property;

2) on the basis of not increasing the fastener part composition and the stress structures of the insulating gauge block and the insulating rail lower base plate, the non-stress structures of the insulating gauge block and the insulating rail lower base plate are improved, the creepage distance of a fastener system is increased, the insulation isolation among the steel rail, the fastener and other iron parts is enhanced, and particularly the insulation performance of the fastener system in a wet state is increased;

3) the contact deformation between the hard insulating gauge block and an insulating rail lower backing plate made of elastic material is utilized to realize the sealing between the hard insulating gauge block and the insulating rail lower backing plate at the gap; in the mode, because the contact surface is small, the contact resultant force is small, and the buckling pressure of the elastic strip and the longitudinal resistance of the steel rail cannot be obviously influenced;

4) the components of the fastener system are not added, the stress mode of the gauge block and the rail lower backing plate is not changed structurally, and only the special insulation design is adopted at the periphery of the corresponding component, so that the original performance of the fastener is not influenced;

5) only the non-stressed structure modification is carried out on the gauge block and the rail lower backing plate, the installation method of the corresponding parts is consistent with the requirements of the original fastener system, other procedures are not required to be added, the construction is convenient, and the better construction efficiency is ensured;

6) the construction is swift, can be applied to all kinds of circuits, can not increase follow-up operation, maintenance work volume, only need to wash according to current railway roadbed washing mode according to relevant regulation clearance.

Drawings

FIG. 1 is a cross-sectional view of a protective device of a stray current protective device for a steel rail according to the present invention;

FIG. 2 is a view of the overall structure of the protection device of the stray current protection device for steel rails according to the present invention;

FIG. 3 is a view of the contact seal structure of the insulation gauge block and the insulation rail lower pad of the stray current protector for the steel rail according to the present invention;

FIG. 4 is a schematic view of the structure of the insulation gauge block of the stray current protection device for steel rail of the present invention;

FIG. 5 is a schematic view of the structure of the lower pad of the insulated rail of the stray current protection device for steel rail of the present invention;

fig. 6 is a cross-sectional view of the lower insulating rail pad of the steel rail stray current protection device of the present invention.

In FIGS. 1-6: 1. a steel rail; 2. an insulating gauge block; 21. an antifouling eaves-blocking structure; 22. a plug-in connector; 23. a cover portion; 3. insulating rail lower backing plates; 31. a cantilever structure; 32. wrapping the edge part; 33. a notch; 34. an eave-type structure; 35. a deformable surface; 36. inserting grooves; 37. a lower side plate; 4. an iron backing plate; 5. a waterproof and anticorrosive layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-6, a stray current protection device for a steel rail comprises a steel rail 1 and a plurality of groups of protection devices arranged on the steel rail at intervals, wherein waterproof anticorrosive coatings 5 are respectively coated on the steel rail 1 and the plurality of groups of protection devices; each group of protection devices comprises 2 insulating track gauge blocks 2 and 1 insulating track lower backing plate 3; the insulating rail lower backing plate 3 is arranged at the lower end of the steel rail 1; the 2 insulation gauge blocks 2 are respectively inserted into two end sides of the insulation rail lower backing plate 3 and respectively buckled and pressed on two sides of the steel rail 1; the front edge of the buckling and pressing contact position of the 2 insulating gauge blocks 2 and the steel rail 1 is provided with an antifouling eave blocking structure 21; the insulating gauge block 2 is in plug-in fit with the insulating rail lower backing plate 3 so as to realize the sealing connection between the insulating gauge block 2 and the insulating rail lower backing plate 3; after the installation is finished, contact deformation exists between the insulating gauge block 2 and the insulating rail lower backing plate 3.

In this embodiment, the waterproof and anticorrosive layer 5 includes a zinc-rich coating and an organic sealing layer sequentially coated on the steel rail and the protection device; the organic sealing layer can also be a pigment paint layer, and the color of the pigment paint layer is any one of gray, blue and black, so that railway signals can not be influenced and interfered.

In this embodiment, the lower insulating rail base plate 3 is fastened and installed on the sleeper through a screw spike, and the insulating gauge block 1 is fastened and pressed on the rail 1 through a fastener. Wherein, the lower backing plate 3 of the insulated rail is arranged corresponding to the sleeper.

In the embodiment, in terms of stress, the structural size and the stress strength of the basic contact surface of the insulating gauge block 2 and the steel rail 1 are consistent with those of a common gauge block, the stress of an original fastener is not changed, and the insulating gauge block has good adaptability to the transformation of the existing line of the gauge blocks with different styles.

The main stress structure of the contact part of the insulating gauge block 2 and the steel rail 1 and the fastener iron seat is consistent with that of a common gauge block; the main stress structure of the lower backing plate 3 of the insulated rail is consistent with that of the lower backing plate of the common rail.

In this embodiment, the length of the lower pad 3 of the insulated rail along the length direction of the steel rail 1 is longer than that of the common pad, and the overhanging structures 31 are formed at the two ends.

In this embodiment, the surface of the insulating gauge block 2, the surface of the insulating rail lower backing plate 3, and the gap between the insulating gauge block 2 and the insulating rail lower backing plate 3 are all coated with insulating paint.

In this embodiment, the insulating gauge block 2 includes an insulating gauge block body, and the antifouling eaves blocking structure 21 is arranged on one side of the insulating gauge block body in the width direction; a gap 33 is arranged at the position, corresponding to the insulating gauge block body, in the width direction of the insulating rail lower backing plate 3; the length difference between the notch 33 and the insulating track gauge block 2 is more than 2 times of the predicted play amount of the insulating track lower backing plate 3; the two ends of the insulating gauge block body along the length direction of the steel rail 1 are provided with plug-in connectors 22; two ends of the notch 33 of the lower pad plate 3 of the insulation rail are provided with inserting grooves 36, and the inserting connector 22 is inserted and matched with the inserting grooves 36.

Wherein, be equipped with bayonet joint 22 at the both ends of insulating gauge block 2, and be equipped with inserting groove 36 at insulating rail lower bolster 3's correspondence, can increase the creepage distance of the breach 33 department of the both ends of insulating gauge block 2 and insulating rail lower bolster 3.

In this embodiment, the front edge of the buckling part of the steel rail 1 of the insulating gauge block 2 is provided with an antifouling eaves blocking structure 21, and the structure can increase the creepage distance of the front edge of the gauge block, so as to enhance the insulating property of the gauge block.

In this embodiment, the antifouling eaves-blocking structure 21 is a protrusion disposed on the insulating gauge block body, the protrusion is located on a side away from the notch 33, and the protrusion is in an upright or curved shape; the projections serve to isolate the path for current to be conducted along the outer surface of the insulating gage block 2 due to contaminant build-up.

In this embodiment, the shape of the plug 22 is one of rectangular, trapezoidal, or zigzag.

In the embodiment, the upper surfaces of the gaps 33 in the insulating gauge block 2 and the insulating rail lower backing plate 3 adopt a contact sealing scheme to realize the sealing of the gap between the insulating gauge block and the insulating rail lower backing plate; after the insulating gauge block 2 is installed in place, the insulating gauge block can be in contact with the lower surface of the notch 33 in the lower backing plate 3 of the insulating rail to enable the insulating gauge block to elastically deform, so that the sealing and seepage-proofing effects are achieved, and direct communication between the steel rail 1 and other parts of the fastener, caused by flowing and accumulation of liquid such as water, oil and dust at small positions, is avoided.

In this embodiment, the deformable surface 35 contacting the bottom surface of the gauge block 2 is disposed on the lower surface of the notch 33 on both sides of the lower pad 3 of the insulated rail.

Wherein, the deformable surface 35 is one of an inclined surface, a U-shaped surface, a convex shaped surface, an arc-shaped surface or other non-flat surfaces; the lower surface of the insulating gauge block 2 is contacted with the lower surface of the gap 33 of the insulating rail lower backing plate 3 and generates certain deformation to realize sealing connection. Because the deformed section adopted by the notch 33 is in a small rigidity form, the notch can be deformed by being compressed by the upper insulating gauge block 2 after being installed, and therefore the sealing is realized. Due to its small deformation cross-section, the interaction force with the insulating gauge block 2 is negligible. From the stress state of the fastener, the interaction generated by the contact seal can not obviously influence the overall stress state of the fastener.

In this embodiment, the covering portions 23 are disposed on the upper surfaces of the plug connectors 22 at the two ends of the insulating gauge block 2, and the covering portions 23 can completely cover the insertion grooves 36 at the two ends of the notch 33 of the lower pad 3 of the insulating rail.

The two ends of the insulating gauge block 2 are covered by the covering parts 23 on the top surfaces of the plug connectors 22, so that liquid and small pollutants can be prevented from being directly conducted on the connecting surfaces of the two, the creepage distance between the two is increased by 3-4 times, accumulation of external pollutants in the insertion groove 36 is reduced, and the risk that other parts of the fastener cannot be conducted with steel is reduced.

In the embodiment, in the length direction of the steel rail 1, the length of the lower backing plate 3 of the insulating rail exceeds the two side edges of the sleeper, so that the problem that water in the insulating gauge block 2 is directly drained to the upper surface of a track bed plate under the condition of humidity or rainwater can be avoided.

In this embodiment, the lower end of the lower pad 3 of the insulated rail is provided with the lower side plate 37, the side surface of the lower side plate 37 is coated with the iron pad 4, and the low surface energy characteristic of the side surface at this position can reduce the accumulation of pollutants, thereby reducing the conduction possibility at this position.

The insulating rail lower backing plate 3 is provided with edge wrapping parts 32 corresponding to two side surfaces of the steel rail 1, and the edge wrapping parts 32 are in a vertical or arc structure; the top end of the hem portion 32 is provided with a eave-type structure 34.

The steel rail stray current protection device provided by the embodiment has the advantages of good coating anti-scratching performance, simple construction process, low production cost, better waterproof effect, better anticorrosion effect and better insulation performance; the installation of the product of the scheme is the same as the assembly and use of a common fastener, and the construction quality is easy to meet; another characteristics do, the utility model discloses correspond the product because efficiency of construction is comparatively unanimous with ordinary fastener, simplified the construction process of corresponding product, also promoted stray current protection system's installation, maintenance efficiency by a wide margin.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. A steel rail stray current protection device comprises a steel rail (1) and a plurality of groups of protection devices arranged on the steel rail (1) at intervals, and is characterized in that waterproof and anticorrosive layers (5) are coated on the steel rail (1) and the plurality of groups of protection devices;

each group of the protection devices comprises 2 insulation track gauge blocks (2) and 1 insulation track lower base plate (3); the insulating rail lower base plate (3) is arranged at the lower end of the steel rail (1); the 2 insulation gauge blocks (2) are respectively inserted into two end sides of the insulation rail lower backing plate (3) and respectively buckled and pressed on two sides of the steel rail (1); and 2, an antifouling eave blocking structure (21) is arranged on the front edge of the buckling and pressing contact position of the insulating gauge block (2) and the steel rail (1).

2. A stray current protection device for steel rails according to claim 1, wherein said water-proof and corrosion-resistant layer (5) comprises a zinc-rich coating and an organic sealing layer sequentially coated on said steel rail (1) and said protection device.

3. A rail stray current protector according to claim 1, wherein said dirt-proof eaves structure (21) is provided on one side of said insulating gage block (2) in the width direction; correspondingly, a notch (33) matched with the insulating track gauge block (2) is formed in the width direction of the insulating track lower base plate (3).

4. A stray current protection device for a steel rail according to claim 3, wherein the lower surface of said notch (33) is one of a slope, a U-shape, a convex shape and an arc shape; the lower surface of the insulating gauge block (2) is in contact with the lower surface of the notch (33) and generates certain deformation to realize sealing connection.

5. A stray current protection device for a steel rail according to claim 3, wherein the two ends of the insulating gauge block (2) along the length direction of the steel rail (1) are provided with plug connectors (22); correspondingly, inserting grooves (36) are formed in two ends of the notch (33) in the lower base plate (3) of the insulating rail; the insulating track gauge block (2) and the insulating track lower backing plate (3) are connected with the plug groove (36) in a matched plug mode through the plug connector (22).

6. A rail stray current protection device according to claim 3, wherein said dirt-proof eaves structure (21) is a protrusion provided on said insulating gauge block (2); the protrusion is positioned on the side far away from the notch (33), and the protrusion is in an upright or bent shape.

7. A steel rail stray current protection device according to claim 5, wherein the upper surface positions of the plug-in connectors (22) at the two ends of the insulation gauge block (2) are provided with covering parts (23); and the covering part (23) completely covers the insulating rail lower pad plate (3).

8. A rail stray current protection according to claim 1, characterized in that the length of the insulating rail lower pad (3) exceeds the two side edges of the sleeper of the rail (1) in the length direction of the rail (1).

9. A steel rail stray current protection device according to claim 1, wherein the lower end of said insulating rail lower pad (3) is provided with a lower side plate (37); the side surface of the lower side plate (37) is coated with an iron backing plate (4).

10. A steel rail stray current protection device according to claim 1, wherein the insulating rail lower base plate (3) is provided with edge wrapping portions (32) corresponding to two side surfaces of the steel rail (1), and the edge wrapping portions (32) are of a vertical or arc structure; the top end of the edge wrapping part (32) is provided with an eave type structure (34).