I-shaped contact rail expansion joint

Abstract

An I-shaped contact rail expansion joint comprises a left sliding rail, a middle rail, a right sliding rail, an upper anchoring clamping plate and a lower anchoring clamping plate, the upper anchoring clamping plate and the lower anchoring clamping plate are clamped on the two sides of rail webs of the left sliding rail, the middle rail and the right sliding rail respectively, and the upper anchoring clamping plate and the lower anchoring clamping plate are fixedly connected with the middle rail and are in sliding connection with the left sliding rail and the right sliding rail; the left sliding rail and the right sliding rail are fixedly connected with the upper anchoring clamping plate through the C-shaped current connector to form a first current-carrying channel; the left sliding rail and the right sliding rail are fixedly connected with the upper anchoring clamping plate through two U-shaped current connectors distributed on the left side and the right side of the C-shaped current connector respectively, and a second current carrying channel is formed. The third electric connection plate is electrically connected with the back of the C-type current connector through a semicircular copper strip. According to the utility model, the two current-carrying channels are arranged to carry current together, so that the electrical splicing reliability is high, and the safety margin is large.

Description

Technical Field

[0001] The utility model relates to the technical field of the contact rail power supply system for urban rail transit, in particular to an I-shaped contact rail expansion joint. Background Art

[0002] The contact rail expansion joint is an essential and important part of the contact rail power supply system, which is used to compensate for the length change of the contact rail caused by thermal expansion and contraction, and ensure the reliability of the electrical connection of the contact rail system and the smooth transition of the current collector shoe. The existing expansion joint has only one current-carrying channel for electrical connection, and the reliability of the electrical connection is relatively low. Moreover, its current connector adopts the M type, and the M-type current connector has high requirements for the clearance limit and cannot meet the requirements for use in small clearances. In addition, when the left and right slide rails of the existing expansion joint slide along the metal anchoring splint, it is easy to generate jamming phenomena, thus affecting the sliding performance of the expansion joint. Summary of the Invention

[0003] The utility model provides an I-shaped contact rail expansion joint to overcome the deficiencies of the prior art.

[0004] The technical solution adopted by the utility model is as follows: an I-shaped contact rail expansion joint, which includes a left slide rail, an intermediate rail, a right slide rail, an upper anchoring splint and a lower anchoring splint. The upper anchoring splint and the lower anchoring splint are respectively clamped on both sides of the rail waists of the left slide rail, the intermediate rail and the right slide rail, and the upper anchoring splint and the lower anchoring splint are fixedly connected to the intermediate rail and slidably connected to the left slide rail and the right slide rail; electric connection plates I and II are respectively fixed on the rail bottoms of the left slide rail and the right slide rail, and an electric connection plate III is fixed on the rail bottom of the intermediate rail; C-shaped current connectors are arranged between the upper anchoring splint and the electric connection plates I and II, and both ends of the C-shaped current connectors are respectively fixedly connected to the electric connection plates I and II, and the back of the C-shaped current connectors is fixedly connected to the upper anchoring splint to form a first current-carrying channel; two U-shaped current connectors are arranged between the upper anchoring splint and the electric connection plates I and II, and the two U-shaped current connectors are distributed on the left and right sides of the C-shaped current connector, and the upper and lower ends of the left U-shaped current connector are respectively fixedly connected to the electric connection plate I and the upper anchoring splint, and the upper and lower ends of the right U-shaped current connector are respectively fixedly connected to the electric connection plate II and the upper anchoring splint to form a second current-carrying channel; the electric connection plate III is electrically connected to the back of the C-shaped current connector through a semi-circular copper strip.

[0005] Non-metallic sliders are clamped between the upper anchoring splint, the lower anchoring splint and the rail waists of the left slide rail, the intermediate rail and the right slide rail, and the non-metallic sliders are respectively fixed together with the upper anchoring splint and the lower anchoring splint.

[0006] The C-type current connector and the U-type current connector are both formed by stacking several layers of copper strips, and several layers of copper strips at the ends of the C-type current connector and the U-type current connector are crimped into an integral structure.

[0007] On one side of the bottom of the left slide rail, the middle rail, and the right slide rail, there are insulating protective covers. The open ends of the insulating protective covers are respectively fixed on the outer sides of the upper anchoring splint and the lower anchoring splint, and the C-type current connector, the U-type current connector, the semi-circular copper strip, the first electrical connection plate, the second electrical connection plate, and the third electrical connection plate are located in the insulating protective covers.

[0008] An inspection opening is provided on the insulating protective cover.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] 1. By providing two current-carrying channels to carry current together, the present utility model has high reliability of electrical connection and a large safety margin.

[0011] 2. The current connector of the present utility model is formed by stacking several layers of copper strips, and several layers of copper strips at its end are crimped into an integral structure (changing the loose and layered state to a state similar to a hard copper plate); making its electrical conduction more stable and reliable, the maintenance period can be appropriately extended, and the operation and maintenance workload can be reduced.

[0012] 3. The present utility model sets non-metallic sliders between the anchoring splints and the left and right slide rails, and the anchoring splints are fitted with the non-metallic sliders, so that the left and right slide rails are not prone to jamming during sliding, ensuring the sliding performance of the expansion joint and avoiding abnormal wear of the expansion joint, and prolonging the service life of the expansion joint.

[0013] 4. The present utility model is provided with several inspection openings on the insulating protective cover, and daily maintenance can be completed without disassembling it, improving the operation and maintenance efficiency and reducing the labor cost. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model after removing the insulating protective cover;

[0015] Figure 2 is a left-view structural diagram of the present utility model;

[0016] Figure 3 is a schematic cross-sectional structural diagram of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the insulating protective cover of the present utility model. Detailed Embodiments

[0018] The following will Figures 1-4 be described in detail with reference to the attached

[0019] An I-shaped contact rail expansion joint includes a left sliding rail 1, an intermediate rail 2, a right sliding rail 3, an upper anchoring splint 4 and a lower anchoring splint 5. The upper anchoring splint 4 and the lower anchoring splint 5 are respectively clamped on both sides of the web of the left sliding rail 1, the intermediate rail 2 and the right sliding rail 3, and the upper anchoring splint 4 and the lower anchoring splint 5 are fixedly connected to the intermediate rail 2 and slidably connected to the left sliding rail 1 and the right sliding rail 3; Electric connection plates 12 and 13 are respectively fixed on the bottom rails of the left sliding rail 1 and the right sliding rail 3, and an electric connection plate 14 is fixed on the bottom rail of the intermediate rail 2; A C-shaped current connector 6 is arranged between the upper anchoring splint 4 and the electric connection plates 12 and 13, and both ends of the C-shaped current connector 6 are fixedly connected to the electric connection plates 12 and 13 respectively, and the back of the C-shaped current connector 6 is fixedly connected to the upper anchoring splint 4 to form a first current-carrying channel; Two U-shaped current connectors 7 are arranged between the upper anchoring splint 4 and the electric connection plates 12 and 13, and the two U-shaped current connectors 7 are distributed on the left and right sides of the C-shaped current connector 6, and the upper and lower ends of the left U-shaped current connector 7 are respectively fixedly connected to the electric connection plate 12 and the upper anchoring splint 4, and the upper and lower ends of the right U-shaped current connector 7 are respectively fixedly connected to the electric connection plate 13 and the upper anchoring splint 4 to form a second current-carrying channel; The electric connection plate 14 is electrically connected to the back of the C-shaped current connector 6 through a semi-circular copper strip 9.

[0020] Furthermore, in order to overcome the jamming and abnormal wear of the upper anchoring splint 4 and the lower anchoring splint 5, non-metallic sliders 8 are clamped between the upper anchoring splint 4 and the lower anchoring splint 5 and the webs of the left sliding rail 1, the intermediate rail 2 and the right sliding rail 3, and the non-metallic sliders 8 are respectively fixed together with the upper anchoring splint 4 and the lower anchoring splint 5.

[0021] Furthermore, the C-shaped current connector 6 and the U-shaped current connector 7 are both composed of several layers of copper strips stacked together, and several layers of copper strips at the ends of the C-shaped current connector 6 and the U-shaped current connector 7 are crimped into an integral structure (changing the loose and layered state into a state similar to a hard copper plate). This makes the electrical conduction more stable and reliable, the maintenance period can be appropriately extended, and the operation and maintenance workload can be reduced.

[0022] In one embodiment, an insulating protective cover 10 is provided on one side of the bottom rails of the left sliding rail 1, the intermediate rail 2 and the right sliding rail 3, and the open ends of the insulating protective cover 10 are respectively fixed on the outside of the upper anchoring splint 4 and the lower anchoring splint 5, and the C-shaped current connector 6, the U-shaped current connector 7, the semi-circular copper strip 9, the electric connection plate 12, the electric connection plate 13 and the electric connection plate 14 are located in the insulating protective cover 10.

[0023] Furthermore, a maintenance port 10-1 is provided on the insulating protective cover 10. This makes maintenance convenient, improves the operation and maintenance efficiency, and reduces the labor cost.

[0024] Specifically, the adjacent ends of the left slide rail 1, the middle rail 2, and the right slide rail 3 are all inclined surfaces. The upper anchoring splint 4 and the lower anchoring splint 5 are provided with mounting holes corresponding to the left slide rail 1, the middle rail 2, and the right slide rail 3. The connecting member 11 passes through the central mounting hole and the middle rail 2 to fix the middle rail 2 between the upper anchoring splint 4 and the lower anchoring splint 5. Strip-shaped holes are provided at the web waist of the left slide rail 1 and the right slide rail 3. The connecting member 11 passes through the mounting holes and the strip-shaped holes at both ends to movably connect the left slide rail 1 and the right slide rail 3 between the upper anchoring splint 4 and the lower anchoring splint 5. The left slide rail 1 and the right slide rail 3 slide along the corresponding strip-shaped holes to approach or move away from the middle rail 2 respectively.

[0025] The above embodiments are only preferred embodiments of the present invention and are not used to limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An I-shaped contact rail expansion joint, comprising a left slide rail (1), a middle rail (2), a right slide rail (3), an upper anchoring clamping plate (4) and a lower anchoring clamping plate (5), wherein the upper anchoring clamping plate (4) and the lower anchoring clamping plate (5) are respectively mounted on both sides of the rail waist of the left slide rail (1), the middle rail (2) and the right slide rail (3), and the upper anchoring clamping plate (4) and the lower anchoring clamping plate (5) are fixedly connected to the middle rail (2) and slidably connected to the left slide rail (1) and the right slide rail (3); characterized in that: An electrical connection plate 1 (12) and an electrical connection plate 2 (13) are fixed to the bottom of the left slide rail (1) and the right slide rail (3), respectively, and an electrical connection plate 3 (14) is fixed to the bottom of the middle rail (2); a C-type current connector (6) is provided between the upper anchoring clamping plate (4) and the electrical connection plate 1 (12) and the electrical connection plate 2 (13), and the two ends of the C-type current connector (6) are fixedly connected to the electrical connection plate 1 (12) and the electrical connection plate 2 (13), respectively, and the back of the C-type current connector (6) is fixedly connected to the upper anchoring clamping plate (4) to form a first current carrying channel; the upper anchoring clamping plate (4) and the electrical connection plate Two U-shaped current connectors (7) are arranged between the first connecting plate (12) and the second connecting plate (13), and the two U-shaped current connectors (7) are distributed on the left and right sides of the C-shaped current connector (6), and the upper and lower ends of the left U-shaped current connector (7) are respectively fixedly connected to the first connecting plate (12) and the upper anchoring clamp (4), and the upper and lower ends of the right U-shaped current connector (7) are respectively fixedly connected to the second connecting plate (13) and the upper anchoring clamp (4) to form a second current-carrying channel; the third connecting plate (14) is electrically connected to the back of the C-shaped current connector (6) through a semicircular copper strip (9).

2. The I-shaped contact rail expansion joint according to claim 1, characterized in that: A non-metallic slider (8) is clamped between the upper anchoring clamp (4), the lower anchoring clamp (5) and the rail waists of the left slide rail (1), the middle rail (2) and the right slide rail (3); the non-metallic slider (8) is fixed to the upper anchoring clamp (4) and the lower anchoring clamp (5) respectively.

3. The I-shaped contact rail expansion joint according to claim 1, characterized in that: The C-shaped current connector (6) and the U-shaped current connector (7) are both formed by stacking a plurality of layers of copper strips, and the plurality of layers of copper strips at the ends of the C-shaped current connector (6) and the U-shaped current connector (7) are crimped into an integral structure.

4. The I-shaped contact rail expansion joint according to claim 1, characterized in that: An insulating protective cover (10) is provided on one side of the bottom of the left slide rail (1), the middle rail (2), and the right slide rail (3), and the open ends of the insulating protective cover (10) are respectively fixed to the outer sides of the upper anchoring clamping plate (4) and the lower anchoring clamping plate (5), and the C-type current connector (6), the U-type current connector (7), the semicircular copper strip (9), the first electrical connection plate (12), the second electrical connection plate (13), and the third electrical connection plate (14) are located in the insulating protective cover (10).

5. The I-shaped contact rail expansion joint according to claim 4, characterized in that: The insulating protective cover (10) is provided with an inspection opening (10-1).

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