Grounding leading-out structure for railway traction power supply system

Abstract

The utility model discloses a grounding lead-out structure for a railway traction power supply system, which comprises a structure bottom plate, a protective cylinder pre-buried in the structure bottom plate and a lead-out copper bus arranged in the protective cylinder in a penetrating manner, a first water swelling strip is sleeved on the outer wall of the lower end of the protective cylinder, a fixed block is fixed on the inner wall of the lower end of the protective cylinder, and the fixed block is fixed on the outer wall of the protective cylinder. A water absorption disc is arranged in the protective cylinder below the fixing block, a first water stop ring is sleeved outside the middle of the protective cylinder, second water-swelling water stop strips are arranged on the upper side and the lower side of the first water stop ring, the edge of the outer side of the first water stop ring is bent downwards and extends to form a water pressing part, and a second water stop ring is sleeved outside the upper portion of the protective cylinder. The upper side and the lower side of the second water stop ring are each provided with a third water swelling water stop strip. The waterproof device has the advantages of being capable of effectively preventing underground water from seeping out in the using process, good in waterproof effect and high in practical value.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway grounding protection technical field, concretely relates to a grounding lead-out structure for railway traction power supply system. BACKGROUND

[0002] In the electrified railway traction power supply system, the traction current needs to be returned to the traction transformer through the path of the rail, the protection line (if any), the return line (if any), the comprehensive grounding (if any) and the ground after being fed out from the traction transformer. The grounding lead-out device is a kind of grounding equipment indispensable in the electrified railway traction power supply system. In use, it is connected with the grounding lead and the grounding net to realize reliable grounding and guide the current in the system to the ground, thereby improving the safety of electricity use.

[0003] The conventional grounding lead-out device usually sets a water stop ring outside the protection cylinder to prevent underground water from overflowing and seeping out to the grounding lead, which leads to unreliable grounding and thus causes safety accidents. However, there may be gaps between the water stop ring and the installation groove, which leads to the seepage of underground water and affects the use effect of the grounding lead-out device. SUMMARY

[0004] The utility model provides a grounding lead-out structure for railway traction power supply system to solve the problem of underground water seepage in the prior art.

[0005] A grounding lead-out structure for railway traction power supply system, comprising a structure bottom plate, a protection cylinder pre-buried in the structure bottom plate, and a lead-out copper busbar penetrating in the protection cylinder, a first water-swelling water stop strip is sleeved on the outer wall of the lower end of the protection cylinder, a fixed block is fixed on the inner wall of the lower end of the protection cylinder, a water absorption disc is arranged in the protection cylinder below the fixed block, a first water stop ring is sleeved on the middle part of the protection cylinder, second water-swelling water stop strips are arranged on the upper and lower sides of the first water stop ring, and the outer side edge of the first water stop ring is bent downward to extend to form a water pressing part, and a second water stop ring is sleeved on the upper part of the protection cylinder, and third water-swelling water stop strips are arranged on the upper and lower sides of the second water stop ring.

[0006] Further, the grounding lead-out structure further comprises a cushion layer, the structure bottom plate is located above the cushion layer, and the lower end of the lead-out copper busbar penetrates downward through the cushion layer.

[0007] Further, a plurality of insulating fixed rings are sleeved on the lead-out copper busbar from top to bottom, the structure and size of the plurality of insulating fixed rings are the same, and the outer diameter of the insulating fixed ring is smaller than the inner diameter of the protection cylinder.

[0008] Further, the gap between the lead-out copper busbar and the protection cylinder is filled with epoxy resin filler to form an insulating filling layer.

[0009] Further, a limiting groove is formed on the outer wall of the protection cylinder, and the first water stop ring is welded and fixed in the limiting groove, and the second water-swelling water stop strip is arranged in the limiting groove on the upper and lower sides of the first water stop ring.

[0010] Further, an end cover is fixedly arranged at the lower end of the protection cylinder, the water absorption disc is clamped between the fixed block and the end cover, and the first water-swelling water stop strip covers the end cover and the protection cylinder.

[0011] Further, the width and thickness of the first water-swelling water stop strip are greater than those of the second water-swelling water stop strip and the third water-swelling water stop strip, and the sizes of the second water-swelling water stop strip and the third water-swelling water stop strip are consistent.

[0012] Further, a rust-proof layer is sprayed on the outer wall of the protection cylinder.

[0013] Beneficial effects:

[0014] 1. The first water stop ring, the second water stop ring, the water absorption disc, the first water-swelling water stop strip, the second water-swelling water stop strip and the third water-swelling water stop strip are arranged, so that the waterproof quality of the grounding lead-out wire position can be effectively ensured, the underground water seepage can be effectively prevented during use, the waterproof effect is good, and the practical value is high.

[0015] 2. Since the water seepage amount below the structure is greater than that above, the size of the first water stop ring is greater than that of the second water stop ring, and a water pressing portion is formed on the first water stop ring, so that the water seepage upwards is effectively prevented, the waterproof performance is ensured, and the implementation cost is effectively considered.

[0016] 3. The limiting groove formed on the outer wall of the protection cylinder can make the second water-swelling water stop strip better fill the gap between the protection cylinder and the first water stop ring, and further effectively prevent the underground water from seeping out from the gap. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is Figure 1 a local enlarged schematic view of A;

[0019] Figure 3 It is Figure 1 a local enlarged schematic view of B. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with embodiments and drawings.

[0021] AsFigures 1-3 As shown in the figure, the grounding lead-out structure for railway traction power supply system comprises a cushion layer 1, a structure base plate 2 arranged on the cushion layer 1, a protection cylinder 3 embedded in the structure base plate 2, and a lead-out copper bus 4 arranged in the protection cylinder 3. The lower end of the lead-out copper bus 4 penetrates through the cushion layer 1 downward to be effectively grounded. A plurality of insulating fixing rings 12 are arranged on the lead-out copper bus 4 from top to bottom. The structure and size of the plurality of insulating fixing rings 12 are the same, and the outer diameter of the insulating fixing ring 12 is smaller than the inner diameter of the protection cylinder 3. The gap between the lead-out copper bus 4 and the protection cylinder 3 is filled with an epoxy resin filler to form an insulating filling layer 13. The lower end of the outer wall of the protection cylinder 3 is sleeved with a first water-swelling sealing strip 5. The inner wall of the lower end of the protection cylinder 3 is welded with a fixing block 6. A water absorption disc 7 is arranged in the protection cylinder 3 below the fixing block 6. The lowermost insulating fixing ring 12 is supported on the fixing block 6. A first water sealing ring 8 is sleeved on the middle part of the protection cylinder 3. Second water-swelling sealing strips 9 are arranged on the upper and lower sides of the first water sealing ring 8. The outer side edge of the first water sealing ring 8 is bent downward to form a water pressing part 8a. A second water sealing ring 10 is sleeved on the upper part of the protection cylinder 3. Third water-swelling sealing strips 11 are arranged on the upper and lower sides of the second water sealing ring 10.

[0022] In the implementation process, the cushion layer 1 and the structure base plate 2 are both made of waterproof concrete. The height of the cushion layer 1 is not less than 500 mm. A plurality of layers of structural steel bars 15 are arranged in the structure base plate 2 to enhance the structural strength. The protection cylinder 3 is made of non-magnetic steel pipe. The upper end surface of the protection cylinder 3 is 100 mm higher than the upper surface of the structure base plate 2. The uppermost insulating fixing ring 12 is arranged at a position 50 mm away from the upper end surface of the protection cylinder 3. The lower end of the protection cylinder 3 is below the lowermost structural steel bar 15. The upper end surface of the lead-out copper bus 4 is 500 mm higher than the upper surface of the structure base plate 2, that is, the length of the lead-out copper bus 4 protruding from the upper end of the protection cylinder 3 is 400 mm.

[0023] In the embodiment, a limiting groove 3a is formed on the outer wall of the protection cylinder 3. The first water sealing ring 8 is welded and fixed in the limiting groove 3a. The second water-swelling sealing strips 9 are arranged in the limiting grooves 3a on the upper and lower sides of the first water sealing ring 8.

[0024] The limiting groove 3a can make the second water-swelling sealing strips 9 better fill the gap between the protection cylinder 3 and the first water sealing ring 8, further effectively preventing groundwater from seeping out of the gap.

[0025] Referring to the drawings, Figure 3 An end cover 14 is fixedly arranged at the lower end of the protection cylinder 3. The end cover 14 is supported on the cushion layer 1. The water absorption disc 7 is clamped between the fixing block 6 and the end cover 14. The first water-swelling sealing strip 5 covers the end cover 14 and the protection cylinder 3.

[0026] In this embodiment, the end cover 14 not only facilitates the arrangement of the water absorption tray 7 , but also helps the groundwater below to penetrate upward into the protective tube 3 along the lead-out copper busbar 4 .

[0027] Preferably, the width and thickness of the first water-swellable waterstop strip 5 are greater than those of the second water-swellable waterstop strip 9 and the third water-swellable waterstop strip 11, and the second water-swellable waterstop strip 9 and the third water-swellable waterstop strip 11 are consistent in size.

[0028] An anti-rust layer is sprayed on the outer wall of the protection tube 3 , and the anti-rust layer is formed by spraying epoxy coal tar high-build anti-rust paint.

[0029] Working principle:

[0030] like Figures 1-3 As shown, when using the above-mentioned grounding lead-out structure, first, a fixing block 6, a first water stop ring 8, a second water stop ring 10, a water absorption plate 7, a first water-swelling water stop strip 5, a second water-swelling water stop strip 9, a third water-swelling water stop strip 11, and an end cover 14 are constructed on the protective tube 3; then, waterproof concrete is cast to form a cushion layer 1; then the protective tube 3 is set on the cushion layer 1 and waterproof concrete is cast to form a structural base plate 2; then, the lead-out copper busbar 4 provided with an insulating fixing block 12 is inserted into the protective tube 3, and extends out after passing through the water absorption plate, the end cover, and the cushion layer 1; then, the insulating filling layer 13 is filled into the protective tube 3, thereby completing the assembly and construction of the grounding lead-out structure.

[0031] In summary, the grounding lead structure described in this embodiment is provided with a first water stop ring 8, a second water stop ring 10, a water absorption plate 7, a first water-swelling water stop strip 5, a second water-swelling water stop strip 9, and a third water-swelling water stop strip 11, which can effectively ensure the waterproof quality at the position of the grounding lead, so that the structure can effectively prevent groundwater from seeping out during use, with good waterproof effect and high practical value. At the same time, the size of the first water stop ring 8 is larger than the second water stop ring 10, and a water pressure portion 8a is formed on the first water stop ring 8, which not only effectively prevents water from penetrating upwards and ensures waterproof performance, but also effectively takes into account the implementation cost.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A grounding lead-out structure for a railway traction power supply system, comprising a structural base plate (2), a protective tube (3) pre-buried in the structural base plate (2), and a lead-out copper busbar (4) passing through the protective tube (3), characterized in that: A first water-expanding waterstop strip (5) is mounted on the outer wall of the lower end of the protective tube (3); a fixing block (6) is fixed on the inner wall of the lower end of the protective tube (3); a water suction disc (7) is provided in the protective tube (3) below the fixing block (6); a first waterstop ring (8) is mounted on the middle portion of the protective tube (3); a second waterstop strip (9) is mounted on the upper and lower sides of the first waterstop ring (8); the outer edge of the first waterstop ring (8) is bent downward to form a water pressure portion (8a); a second waterstop ring (10) is mounted on the upper portion of the protective tube (3); and a third waterstop strip (11) is mounted on the upper and lower sides of the second waterstop ring (10).

2. The grounding lead structure for a railway traction power supply system according to claim 1, characterized in that: The grounding lead-out structure further comprises a pad layer (1), the structural base plate (2) is located above the pad layer (1), and the lower end of the lead-out copper busbar (4) passes downward through the pad layer (1).

3. The grounding lead structure for a railway traction power supply system according to claim 1, characterized in that: A plurality of insulating fixing rings (12) are sleeved on the lead-out copper busbar (4) from top to bottom. The plurality of insulating fixing rings (12) have the same structure and size, and the outer diameter of the insulating fixing ring (12) is smaller than the inner diameter of the protective tube (3).

4. The grounding lead structure for a railway traction power supply system according to claim 3, characterized in that: The gap between the lead-out copper busbar (4) and the protective tube (3) is filled with epoxy resin filler to form an insulating filling layer (13).

5. The grounding lead structure for a railway traction power supply system according to claim 1, characterized in that: A limiting groove (3a) is provided on the outer wall of the protective tube (3), the first water stop ring (8) is welded and fixed in the limiting groove (3a), and the second water-expanding water stop strip (9) is provided in the limiting grooves (3a) on the upper and lower sides of the first water stop ring (8).

6. The grounding lead structure for a railway traction power supply system according to claim 1, characterized in that: An end cover (14) is fixedly provided at the lower end of the protective tube (3), the water absorption disc (7) is clamped between the fixed block (6) and the end cover (14), and the first water-swellable water stop strip (5) covers the end cover (14) and the protective tube (3).

7. The grounding lead structure for a railway traction power supply system according to claim 1, characterized in that: The width and thickness of the first water-swelling waterstop strip (5) are greater than those of the second water-swelling waterstop strip (9) and the third water-swelling waterstop strip (11), and the second water-swelling waterstop strip (9) and the third water-swelling waterstop strip (11) are of the same size.

8. The grounding lead structure for a railway traction power supply system according to any one of claims 1 to 7, characterized in that: An anti-rust layer is sprayed on the outer wall of the protective cylinder (3).

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