Anti-stray current insulation fastener for rail transit and insulation method of anti-stray current insulation fastener

Abstract

The invention provides an anti-stray current insulation fastener for rail transit, which belongs to the technical field of railway track assembly manufacturing and comprises an under-rail backing plate, an iron backing plate, an insulation gauge block, an elastic strip, a spike and an insulation sleeve. The steel rail is pressed by the insulating gauge block; the elastic strip is used for pressing the insulating gauge block; the upper end of the spike is wrapped by the insulating sleeve; the lower end of the spike penetrates through the iron base plate; the spike is isolated from other metal parts of the fastener, current conduction is blocked, and the insulation performance of the fastener in a complex environment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway track component manufacturing, and in particular to an anti-stray current insulating fastener for rail transit and an insulation method thereof. Background Art

[0002] As the main power source for urban rail transit, the DC traction power supply system often uses rails as the power supply return path. When the insulation performance of the rails to the ground is insufficient, the rail potential will be too high, forming stray currents, which will cause serious corrosion to the safe operation of rail transit and its surrounding municipal metal pipeline facilities and buried metals. Therefore, stray current protection of urban rail transit has gradually become one of the core issues restricting the development of urban rail transit, posing a huge safety hazard to subway operations. Therefore, studying the insulation performance of subway rail fasteners is of great significance for the protection of subway stray currents.

[0003] CN 103572671 A discloses a fastener for tram tracks, comprising an iron pad, two spring bars, two bolts, two spiral spikes, a grooved rail protection mechanism, and two fastener covers. The iron pad is laid on a base, the grooved rail protection mechanism is symmetrically arranged at the center line of the iron pad, the grooved rail is pressed on the grooved rail protection mechanism, and the grooved rail protection mechanism wraps the bottom and the side of the bottom of the grooved rail, the two bolts and the two spiral spikes are respectively arranged on both sides of the grooved rail and are mirror-symmetrical about the grooved rail, the spiral spike passes through the iron pad and penetrates into the base and is locked by a nut, the bolt is pressed on the spring bar, passes through the iron pad to the base and is locked by the nut, the spring bar is pressed on the iron pad, and two ends are pressed on the parts of the grooved rail protection mechanism wrapped on the sides of the bottom of the grooved rail, and the two fastener covers are arranged on both sides of the grooved rail and respectively cover the bolts and the spiral spikes.

[0004] In the existing patents, the insulation performance of the gauge block and the rail pad in the fastener is improved, thereby improving the insulation performance of the fastener system, but the insulation performance of the entire fastener system is reduced, and the following reasons also include: 1. The spike is the main fastening component of the entire fastener system. Since the spike is exposed to the outside without any protective parts, it is easily polluted by the environment, resulting in the conduction between the spike and the sleeper, and the pad under the board cannot play a good insulation role; 2. The iron pad is directly connected to the spring bar. When there is dust and water on the surface, the insulating paint cannot play an insulating role, resulting in conduction. The pad under the rail has no contribution to the insulation of the fastener; 3. Although the gauge block plays an insulating role, it does not significantly improve the insulation performance of the entire fastener system. Summary of the invention

[0005] The present invention provides an anti-stray current insulating fastener for rail transit, which is used to solve the defects of fasteners of tram tracks in the prior art and improve the use safety and reliability of the rail fastener system.

[0006] The present invention provides an anti-stray current insulating fastener for rail transit, comprising: a rail pad, an iron pad, an insulating gauge block, a spring bar, a spike and an insulating sleeve; the rail pad is padded under the rail, the iron pad is padded under the rail pad, the insulating gauge block is pressed on the rail, the spring bar is used to press the insulating gauge block, the insulating sleeve wraps the upper end of the spike, the lower end of the spike passes through the iron pad, and the end of the insulating sleeve is clamped between the spike and the iron pad.

[0007] According to the present invention, an insulating fastener for preventing stray current for rail transit further includes an insulating cap, which is installed on the spike, and the lower part of the insulating cap is connected to the insulating sleeve.

[0008] According to the stray current protection insulating fastener for rail transit provided by the present invention, the insulating sleeve is nested in the iron pad.

[0009] According to an anti-stray current insulating fastener for rail transit provided by the present invention, the iron base plate is provided with an insulating cover, and the insulating cover wraps the upper surface and surrounding of the iron base plate.

[0010] According to an anti-stray current insulating fastener for rail transit provided by the present invention, the insulating sleeve is T-shaped, the upper end of the insulating sleeve is an annular flange, the outer diameter of the annular flange is larger than the outer diameter of the spike head, the head of the spike is pressed against the annular flange, and the annular flange is pressed against the iron pad.

[0011] According to the stray current protection insulating fastener for rail transit provided by the present invention, one end of the elastic bar is installed in the iron pad.

[0012] According to the stray current protection insulating fastener for rail transit provided by the present invention, the insulating cover is provided with an opening for discharging fluid.

[0013] According to the stray current protection insulating fastener for rail transit provided by the present invention, the insulating cover includes an insulating layer.

[0014] The present invention also provides an insulation method, wherein the insulating sleeve is sleeved on the upper half of the screw rod of the road spike, the lower end of the insulating sleeve is fixed on the insulating cover, the insulating sleeve and the insulating cover are sealed to prevent rainwater and dust from entering the insulating sleeve, and the upper end of the insulating sleeve is clamped between the road spike and the insulating cover to separate the road spike from the iron pad to prevent conduction.

[0015] According to an insulation method provided by the present invention, an insulation cap is placed on the head of the road spike, and the insulation cap is used to isolate the road spike from the external environment.

[0016] The stray current-proof insulating fastener for rail transit provided by the present invention isolates the rail spike from other metal parts of the fastener to block the conduction of current, thereby improving the insulation performance of the fastener in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the anti-stray current insulating fastener for rail transit provided by the present invention; Figure 2 is a cross-sectional view of the anti-stray current insulating fastener for rail transit provided by the present invention; Figure 3 It is a structural schematic diagram of the insulating sleeve provided by the present invention; Figure 4 It is a structural schematic diagram of the insulating cap provided by the present invention; Figure 5 It is a structural schematic diagram of the insulation cover provided by the present invention.

[0019] Reference numerals: 1. Rails; 100. Rail pad; 200, iron pad; 210, insulation cover; 300, Insulated gauge block; 400, spring bar; 500, spikes; 600, insulation sleeve; 610, annular flange; 700. Insulating cap. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on Figure 1 The orientation and position of the anti-stray current insulating fasteners for rail transit when normally placed are shown only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention provides an anti-stray current insulating fastener for rail transit, see Figure 1-Figure 2 , including: a rail pad 100, an iron pad 200, an insulating gauge block 300, an elastic bar 400, a spike 500 and an insulating sleeve 600; the rail pad 100 is padded under the rail, the iron pad 200 is padded under the rail pad 100, the insulating gauge block 300 is pressed on the rail, the elastic bar 400 is used to press the insulating gauge block 300, the insulating sleeve 600 wraps the upper end of the spike 500, the lower end of the spike 500 passes through the iron pad 200, and the end of the insulating sleeve 600 is clamped between the spike 500 and the iron pad 200.

[0025] The rails are fixed by spring bars 400, and gauge blocks are installed on both sides of the rails to prevent the rails from moving longitudinally and transversely relative to the sleepers, ensuring that the gauge is normal. By isolating the spikes 500 from the other metal parts of the fastener, the conduction of current is blocked, thereby improving the insulation performance of the fastener in complex environments.

[0026] In one embodiment, see Figure 4 The anti-stray current insulating fastener for rail transit also includes an insulating cap 700, which is installed on the spike 500, and the lower part of the insulating cap 700 is connected to the insulating sleeve 600.

[0027] Exemplarily, the insulating cap 700 is connected to the insulating sleeve 600 by means of a slot or the like, and the road spike 500 is wrapped therein, so as to ensure that liquid, dust, etc. will not enter from the top and contaminate the road spike 500.

[0028] The insulating cap 700 not only covers the head of the road spike 500, but also covers the insulating sleeve 600, effectively isolating the road spike 500 and the insulating sleeve 600 from the external environment, preventing dust and rainwater from penetrating into the road spike 500 and the insulating sleeve 600, and effectively avoiding the external environment from affecting the insulation performance of the fastener system.

[0029] In one embodiment, the insulating sleeve 600 is nested in the iron backing plate 200 .

[0030] The road spike 500 is arranged inside and connected to the insulating cap 700 outside, which plays the role of fixing the road spike 500 and ensures that dust, stains, etc. will not contaminate the road spike 500 from the side.

[0031] In one embodiment, see Figure 1 , Figure 2 , Figure 5 The iron backing plate 200 is provided with an insulating cover 210 , and the insulating cover 210 wraps the upper surface and surrounding of the iron backing plate 200 .

[0032] Since the traditional iron pad 200 is made of metal material, it is a good conductor of current and plays an adverse role in the fastener insulation system. However, as a main load-bearing component, it is difficult to replace it with a suitable material. The insulating cover 210 wraps the iron pad 200 as a whole, and is provided with an opening to discharge fluid, wraps the upper surface and surrounding of the iron pad 200, and is fixed to the iron pad 200 through the mounting hole of the insulating sleeve 600 and the surrounding structure of the side, thereby reducing the risk of conduction between the rail and the iron pad 200 and further increasing the insulation performance of the fastener.

[0033] In one embodiment, see Figure 3 The insulating sleeve 600 is T-shaped, and the upper end of the insulating sleeve 600 is an annular flange 610. The outer diameter of the annular flange 610 is larger than the outer diameter of the head of the spike 500. The head of the spike 500 is pressed tightly against the annular flange 610, and the annular flange 610 is pressed against the iron pad 200. The annular flange 610 completely separates the head of the spike 500 from the iron pad 200.

[0034] In one embodiment, one end of the spring bar 400 is installed in the iron backing plate 200. The insulating cover 210 is provided with an opening for draining fluid. The insulating cover 210 includes an insulating layer.

[0035] The insulating layer is made of rubber, nylon, POM, HDPE and other materials, which wraps the upper surface and surrounding of the iron pad 200, and is fixed to the iron pad 200 through the mounting hole of the insulating sleeve 600 and the surrounding structure of the side. In a complex environment, it prevents the rail from forming a passage with the iron pad 200 through rainwater, stains, etc., thereby reducing the formation of stray current.

[0036] The present invention provides an insulation method for an anti-stray current insulating fastener for rail transit, wherein an insulating sleeve 600 is sleeved on the upper half of the screw of a railroad spike 500, and the lower end of the insulating sleeve 600 is fixed on an insulating cover 210, and the insulating sleeve 600 and the insulating cover 210 are sealed to prevent rainwater and dust from entering the insulating sleeve 600, and the upper end of the insulating sleeve 600 is clamped between the railroad spike 500 and the insulating cover 210 to separate the railroad spike 500 from the iron pad 200 to prevent conduction. An insulating cap 700 is covered on the head of the railroad spike 500, and the insulating cap 700 is used to isolate the railroad spike 500 from the external environment.

[0037] The above-described insulation method of an anti-stray current insulating fastener for rail transit is to add an insulating sleeve 600 between the spike 500 and the sleeve, and the upper end of the insulating sleeve 600 is clamped between the spike 500 and the insulating cover 210 to separate the two, which can effectively prevent the spike 500 from being connected to the iron pad 200 under harsh working conditions. The insulating sleeve 600 can effectively prevent dust and rainwater from entering, causing the spike 500 to be immersed in water and connected. The insulating cap 700 is used to isolate the spike 500 from the external environment, which plays a role in waterproofing and dustproofing, and improves the service life of the spike 500. By improving the structure of the rail fastener system, the insulation performance of the fastener system is improved, the formation of stray current is reduced, and the corrosion to municipal pipelines is reduced. The reliability and safety of the rail fastener system in long-term use under harsh working conditions are improved.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-stray current insulating fastener for rail transit, characterized in that: include: Rail pads, iron pads, insulating gauge blocks, spring bars, spikes and insulating sleeves; The rail pad is placed under the rail, the iron pad is placed under the rail pad, the insulating gauge block is pressed on the rail, the spring bar is used to compress the insulating gauge block, the insulating sleeve wraps the upper end of the spike, the lower end of the spike passes through the iron pad, and the insulating sleeve end is clamped between the spike and the iron pad.

2. The anti-stray current insulating fastener for rail transit according to claim 1, characterized in that: The anti-stray current insulating fastener for rail transit also includes an insulating cap, which is installed on the spike, and the lower part of the insulating cap is connected to the insulating sleeve.

3. The anti-stray current insulating fastener for rail transit according to claim 2, characterized in that: The insulating sleeve is nested in the iron backing plate.

4. The anti-stray current insulating fastener for rail transit according to claim 3, characterized in that: The iron backing plate is provided with an insulating cover, and the insulating cover wraps the upper surface and surrounding of the iron backing plate.

5. The anti-stray current insulating fastener for rail transit according to claim 4, characterized in that: The insulating sleeve is T-shaped, and the upper end of the insulating sleeve is an annular flange. The outer diameter of the annular flange is larger than the outer diameter of the spike head. The spike head is pressed tightly against the annular flange, and the annular flange is pressed against the iron pad.

6. The anti-stray current insulating fastener for rail transit according to claim 5, characterized in that: One end of the spring bar is arranged in the iron backing plate.

7. The anti-stray current insulating fastener for rail transit according to claim 6, characterized in that: The insulating cover is provided with an opening for discharging fluid.

8. The anti-stray current insulating fastener for rail transit according to claim 7, characterized in that: The insulating cover includes an insulating layer.

9. The insulation method of the anti-stray current insulating fastener for rail transit according to any one of claims 1 to 8, characterized in that: The insulating sleeve is put on the upper half of the screw rod of the road spike, and the lower end of the insulating sleeve is fixed on the insulating cover. The insulating sleeve and the insulating cover are sealed to prevent rainwater and dust from entering the insulating sleeve. The upper end of the insulating sleeve is clamped between the road spike and the insulating cover to separate the road spike from the iron pad to prevent conduction.

10. The insulation method of a rail fastening system according to claim 9, characterized in that: An insulating cap is placed on the head of the spike to isolate the spike from the external environment.

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