A traction return structure for a rack railway with AC traction power supply

Abstract

A traction return structure of a rack railway with AC traction power supply system is used to effectively reduce the potential difference between the rack and the rail, and reduce the risk of safety accidents of maintenance personnel. The double-track railway includes an upward left rail, an upward right rail, an upward rack track, and a downward left rail, a downward right rail, and a downward rack track. The upward left rail is connected to the upward right rail through an upward choke transformer, and the neutral point of the upward choke transformer is connected to the upward rack track through a first cable; the downward left rail is connected to the downward right rail through a downward choke transformer, and the neutral point of the downward choke transformer is connected to the downward rack track through a second cable. The upward right rail is connected to the downward left rail through a third cable at intervals, and the upward rack track is connected to the downward rack track through a fourth cable at intervals.

Description

Technical Field

[0001] With the development of rack technology, a mountain tourist rack railway has emerged in my country. Its line passes through tourist scenic spots with tourism as its main purpose. It has the characteristics of large slope, high ratio of bridges and tunnels, high landscape requirements and low train speed requirements. Background Art

[0002] With the development of rack technology, a mountain tourist rack railway has emerged in my country. Its line passes through tourist scenic spots with tourism as its main purpose. It has the characteristics of large slope, high ratio of bridges and tunnels, high landscape requirements and low train speed requirements.

[0003] A rack track is added between the two rails on the upper and lower sides of the entire cog railway line. The rack motor on the locomotive drives the special gear to mesh with the rack, and cooperates with the traditional wheel-rail motor to provide traction power for the electric locomotive. Consistent with the traction current direction of domestic conventional railways, the traction current of the cog railway flows out from the traction substation, through the power supply line to the contact network, enters the locomotive through the pantograph of the cog railway locomotive, and then enters the rail, return line and the ground through the wheelset to flow back to the traction substation.

[0004] Since the maximum limit slope of the rack rail line is much larger than that of conventional railways, the traction current of the rack rail locomotive is large and continuous, and the current entering the rail is also large, resulting in a large potential difference between the rail and the rack rail. Maintenance personnel will be seriously threatened by contact voltage or step voltage. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a traction return structure of a rack railway with AC traction power supply system, so as to effectively reduce the potential difference between the rack and the rail and reduce the risk of safety accidents of maintenance personnel.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0007] The present invention discloses a traction return structure of a rack railway with AC traction power supply system, wherein the double-track railway comprises an upward left rail, an upward right rail, an upward rack track and a downward left rail, a downward right rail, and a downward rack track, and is characterized in that: the upward left rail is connected to the upward right rail through an upward choke transformer, and the neutral point of the upward choke transformer is connected to the upward rack track through a first cable; the downward left rail is connected to the downward right rail through a downward choke transformer, and the neutral point of the downward choke transformer is connected to the downward rack track through a second cable; the upward right rail is connected to the downward left rail through a third cable at intervals, and the upward rack track is connected to the downward rack track through a fourth cable at intervals.

[0008] The beneficial effect of the present invention is that the rack track of the new rack railway is utilized to make it a part of the traction return system, and the rack track, the rail and the ground are closely connected to form a complete and multiple return channel, which effectively reduces the potential difference between the rail and the rack track of the rack railway with AC power supply system, and reduces the risk of safety accidents for maintenance personnel; no overhead return line is set, which reduces the construction and operation and maintenance costs, and at the same time makes the contact network structure simpler, reducing the impact on the tourist landscape along the railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] This specification includes the following drawing:

[0010] Figure 1 The present invention is a schematic diagram of a traction return structure of a rack railway with AC traction power supply system.

[0011] The figure shows the components and corresponding marks: upward left rail 1, upward choke transformer 2, upward right rail 3, first cable 4, upward rack track 5, downward left rail 6, downward choke transformer 7, downward right rail 8, second cable 9, downward rack track 10, third cable 11, fourth cable 12, upward choke transformer 13, first return cable 14, traction substation structural ground grid 15, second return cable 16, downward choke transformer 17, third return cable 18, fourth return cable 19, fifth cable 20. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Reference Figure 1The present invention discloses a traction return structure of a rack railway with AC traction power supply system. The double-track railway comprises an upward left rail 1, an upward right rail 3, an upward rack track 5, a downward left rail 6, a downward right rail 8, and a downward rack track 10. The upward left rail 1 is connected to the upward right rail 3 through an upward choke transformer 2, and the neutral point of the upward choke transformer 2 is connected to the upward rack track 5 through a first cable 4. The downward left rail 6 is connected to the downward right rail 8 through a downward choke transformer 7, and the neutral point of the downward choke transformer 7 is connected to the downward rack track 10 through a second cable 9. The upward right rail 3 is connected to the downward left rail 6 through a third cable 11 at intervals (about 500 meters), and the upward rack track 5 is connected to the downward rack track 10 through a fourth cable 12 at intervals (about 500 meters). That is, the rack rails of the new rack railway are used as part of the traction return system, which closely connects the rack rails, steel rails and the earth to form a complete and diversified return channel, effectively reducing the potential difference between the steel rails and the rack rails of the rack railway with AC power supply, and reducing the risk of safety accidents for maintenance personnel. No overhead return line is set up, which reduces the construction and operation and maintenance costs, and makes the contact network structure simpler, reducing the impact on the tourist landscape along the railway.

[0014] Reference Figure 1 Near the traction substation, the upward left rail 1 is connected to the upward right rail 3 through the upward choke transformer 13, the neutral point of the upward choke transformer 13 is connected to the traction substation structure grounding network 15 through the first return cable 14, and the upward rack track 5 is connected to the traction substation structure grounding network 15 through the second return cable 16. The downward left rail 6 is connected to the downward right rail 8 through the downward choke transformer 17, the neutral point of the downward choke transformer 17 is connected to the traction substation structure grounding network 15 through the third return cable 18, and the downward rack track 10 is connected to the traction substation structure grounding network 15 through the return cable 19. The upward right rail 3 is connected to the downward left rail 6 through the fifth cable 20.

[0015] The above description is only to illustrate some principles of the AC power supply system rack railway traction return technology of the present invention, and is not intended to limit the present invention to the specific structure and applicable scope shown and described. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the present invention.

Claims

1. A traction return structure of a rack railway with AC traction power supply system, the double-track railway comprising an upward left steel rail (1), an upward right steel rail (3), an upward rack track (5) and a downward left steel rail (6), a downward right steel rail (8), and a downward rack track (10), wherein: The upward left steel rail (1) is connected to the upward right steel rail (3) through the upward choke transformer (2), and the neutral point of the upward choke transformer (2) is connected to the upward rack track (5) through the first cable (4); the downward left steel rail (6) is connected to the downward right steel rail (8) through the downward choke transformer (7), and the neutral point of the downward choke transformer (7) is connected to the downward rack track (10) through the second cable (9); the upward right steel rail (3) is connected to the downward left steel rail (6) through the third cable (11) at intervals, and the upward rack track (5) is connected to the downward rack track (10) through the fourth cable (12) at intervals.

2. The traction return structure of the rack railway with AC traction power supply system as claimed in claim 1 is characterized in that: Near the traction substation, the upward left rail (1) is connected to the upward right rail (3) through the upward choke transformer (13), the neutral point of the upward choke transformer (13) is connected to the traction substation structural ground grid (15) through the first return cable (14), and the upward rack track (5) is connected to the traction substation structural ground grid (15) through the second return cable (16); the downward left rail (6) is connected to the downward right rail (8) through the downward choke transformer (17), the neutral point of the downward choke transformer (17) is connected to the traction substation structural ground grid (15) through the third return cable (18), and the downward rack track (10) is connected to the traction substation structural ground grid (15) through the return cable (19); the upward right rail (3) is connected to the downward left rail (6) through the fifth cable (20).

Images