An electrical segmentation device for railway contact network

Abstract

The present invention provides an electrical segmentation device for a railway contact network, which relates to the field of rail transit technology, and includes a segmentation insulator, a contact network, and a disconnector. The segmentation insulator includes a first segmentation insulator and a second segmentation insulator, and each segmentation insulator includes a slide plate and an insulating rod. The slide plates include a pair of long slide plates and a pair of short slide plates, and an air gap is provided between the long slide plate and the short slide plate, and an arc extinguishing angle is provided at the end. A contact network transition section is provided between the first and second segmentation insulators, and a disconnector is provided between the contact network transition section and the contact network. The present invention avoids the problem of increasing the electrical gap of the slide plate and the creepage distance of the insulating rod on a single segmentation insulator by adopting a system solution of a series gap plus a disconnector.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to an electrical segmentation device for a railway contact network. Background Art

[0002] At present, the known electrified railway contact network electrical segmentation device is a structure with an intermediate insulating rod as the main supporting force-bearing member, and the attached four metal slides as the guide rails for the locomotive pantograph to pass smoothly. The air gap formed by the insulating rod and the slide rail is used to achieve the purpose of electrical isolation of the live parts at both ends of the segment insulator. For a 25kV electrified railway, when the altitude is below 1500m, the air gap value in my country is 300mm, and the creepage distance of the insulating rod is 1600mm. With the increase of altitude, both the air gap and the creepage distance of the insulating rod must be corrected and increased to meet the requirements of system electrical insulation. The increase of these two parameters will bring the following adverse consequences: (1) The longitudinal and transverse dimensions of the segment insulator are increased, thereby increasing the weight, which is not conducive to the stability and current collection quality of the locomotive pantograph when passing, and increasing the risk of pantograph breaking when passing; (2) The number of non-standard parts used is increased, thereby increasing the manufacturing and procurement costs; (3) The workload of operation and maintenance is increased. Therefore, designing an electrical segmentation device for railway contact network has become a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide an electrical segmentation device for a railway contact network.

[0004] The present invention is implemented through the following technical scheme: an electrical segmentation device for a railway contact network, characterized in that it includes a segmentation insulator, a contact network and a disconnector, the segmentation insulator includes a first segmentation insulator located on the left and a second segmentation insulator on the right, the first and second segmentation insulators both include a slide plate and an insulating rod, the slide plate includes a pair of long slide plates and a pair of short slide plates staggered on both sides of the insulating rod, an air gap is provided between the long slide plates and the short slide plates, and arc extinguishing angles are provided at the ends, a contact network transition section for connecting the two segmentation insulators is provided between the first and second segmentation insulators, the contact network includes a first contact network and a second contact network, the first contact network is connected to the left side of the first segmentation insulator, the second contact network is connected to the right side of the second segmentation insulator, and a disconnector is provided between the contact network transition section and the contact network.

[0005] According to the above technical solution, preferably, the length of the long slide is greater than the length of the short slide.

[0006] According to the above technical solution, preferably, the segmented insulator is a segmented insulator with an air gap of 300 mm and a creepage distance of 1600 mm.

[0007] According to the above technical solution, preferably, the isolating switch is an electric isolating switch and its two ends are respectively connected to the contact network transition section and the second contact network.

[0008] The beneficial effects of the present invention are as follows: the present invention avoids the problem of increasing the electrical clearance of the slide plate and the creepage distance of the insulating rod on a single segmented insulator by adopting a system solution of a series gap plus an isolating switch. By connecting two sets of segmented insulators in series for low-altitude sections, an electrical clearance of 600 mm and an insulating rod creepage distance of not less than 3.2 m can be constructed. These technical indicators can fully cover the construction needs of the electrified railway contact network system at an altitude of more than 6000 m. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A structural schematic diagram according to an embodiment of the present invention is shown.

[0010] In the figure: 1. disconnector; 2. first section insulator; 3. second section insulator; 4. insulating rod; 5. long slide plate; 6. short slide plate; 7. air gap; 8. arc extinguishing angle; 9. contact network transition section; 10. first contact network; 11. second contact network. DETAILED DESCRIPTION

[0011] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiments.

[0012] As shown in the figure, the present invention provides an electrical segmentation device for a railway contact network, characterized in that it includes a segmentation insulator, a contact network and a disconnector 1, the segmentation insulator includes a first segmentation insulator 2 located on the left and a second segmentation insulator 3 on the right, the first and second segmentation insulators both include a slide plate and an insulating rod 4, the slide plate includes a pair of long slide plates 5 and a pair of short slide plates 6 staggered on both sides of the insulating rod 4, an air gap 7 is provided between the long slide plates 5 and the short slide plates 6, and an arc extinguishing angle 8 is provided at the end, a contact network transition section 9 for connecting the two segmentation insulators is provided between the first and second segmentation insulators, the contact network includes a first contact network 10 and a second contact network 11, the first contact network 10 is connected to the left side of the first segmentation insulator 2, the second contact network 11 is connected to the right side of the second segmentation insulator 3, and a disconnector 1 is provided between the contact network transition section 9 and the contact network.

[0013] According to the above embodiment, preferably, the length of the long slide plate 5 is greater than the length of the short slide plate 6 .

[0014] According to the above embodiment, preferably, the first and second segment insulators are segment insulators with an air gap of 300 mm and a creepage distance of 1600 mm.

[0015] According to the above embodiment, preferably, the disconnector 1 is an electric disconnector and its two ends are connected to the contact network transition section 9 and the second contact network 11 respectively.

[0016] The working principle of the present invention is as follows: when the overhead contact network is running under power, the isolating switch is in a normally closed state, and the working state of the train pantograph when passing through the segmented insulator is consistent with the operating conditions of other existing lines. When the isolating switch is opened, the air gap and creepage distance formed in the electrical circuit will be greatly increased through the joint action of the two segmented insulators, thereby avoiding a series of disadvantages caused by increasing the size of the segmented insulator at high altitudes.

[0017] The beneficial effects of the present invention are as follows: the present invention avoids the problem of increasing the electrical gap of the slide plate and the creepage distance of the insulating rod on a single segmented insulator by adopting a system solution of a series gap plus an isolating switch. By connecting two sets of segmented insulators in series for low-altitude sections, a larger electrical gap and creepage distance of the insulating rod can be constructed. These technical indicators can fully cover the needs of the construction of electrified railway contact network systems at an altitude of more than 6000m.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electrical segmentation device for a railway contact network, characterized in that: The invention comprises a segmented insulator, a contact network and a disconnector, wherein the segmented insulator comprises a first segmented insulator located on the left and a second segmented insulator on the right, wherein the first segmented insulator and the second segmented insulator both comprise a slide plate and an insulating rod, wherein the slide plate comprises a pair of long slide plates and a pair of short slide plates staggered on both sides of the insulating rod, wherein an air gap is provided between the long slide plates and the short slide plates and arc extinguishing angles are provided at the ends, wherein a contact network transition section for connecting the two segmented insulators is provided between the first segmented insulator and the second segmented insulator, wherein the contact network comprises a first contact network and a second contact network, wherein the first contact network is connected to the left side of the first segmented insulator and the second contact network is connected to the right side of the second segmented insulator, and a disconnector is provided between the contact network transition section and the contact network.

2. The electric segmentation device of a railway contact network according to claim 1, characterized in that: The length of the long slide is greater than that of the short slide.

3. The electric segmentation device for a railway contact network according to claim 1, characterized in that: The air gap between the first segment insulator and the second segment insulator is 300 mm, and the creepage distance between the first segment insulator and the second segment insulator is 1600 mm.

4. The electric segmentation device for a railway contact network according to claim 1, characterized in that: The isolating switch is an electric isolating switch and its two ends are respectively connected to the contact network transition section and the second contact network.

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