阅读说明：本技术 一种长距离轨道交通高速架空刚性接触网电分相设备 (Electric phase splitting equipment for long-distance rail transit high-speed overhead rigid contact network ) 是由 皋金龙 李金龙 周玉杰 王正 李金华 杨建兴 刘晓光 陈凯 张芳志 吴云飞 于 2021-08-04 设计创作，主要内容包括：本发明提供了一种长距离轨道交通高速架空刚性接触网电分相设备,包括中性段和电气导通装置,两个供电臂间设置有三个中性段,所述供电臂与其相邻的中性段通过电气导通装置连接,位于中间位置的中性段接地。本发明设置3个中性段,相对于现有技术中的1个或2个中性段,电分相长度的适量加长可保证受电弓通过时不同相位供电的安全转换,避免自动过分相产生的过电压及涌流问题,并通过将位于中间位置的中性段可靠接地,实现电分相的消弧功能。(The invention provides a long-distance rail transit high-speed overhead rigid contact network electric phase splitting device which comprises a neutral section and an electric conduction device, wherein three neutral sections are arranged between two power supply arms, the power supply arms are connected with the adjacent neutral sections through the electric conduction device, and the neutral sections positioned in the middle are grounded. Compared with 1 or 2 neutral sections in the prior art, the neutral section length is properly lengthened, so that the safe conversion of power supply of different phases when the pantograph passes through can be ensured, the problems of overvoltage and inrush current caused by automatic neutral section passing are avoided, and the neutral section positioned in the middle position is reliably grounded, so that the arc extinction function of the neutral section is realized.)

1. The utility model provides a high-speed overhead rigid contact net electricity phase splitting equipment of long distance rail transit which characterized in that: the three-phase power supply device comprises a neutral section and an electric conduction device, wherein three neutral sections are arranged between two power supply arms, the power supply arms are connected with the adjacent neutral sections through the electric conduction device, and the neutral section positioned in the middle is grounded.

2. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 1, wherein: the power supply arm and the neutral section, and the neutral section are divided through an insulating anchor section joint.

3. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 2, wherein: and a contact line arc extinguishing angle mechanism is arranged on a busbar terminal of the insulating anchor section joint.

4. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 3, wherein: the contact line arc extinguishing angle mechanism is an arc extinguishing angle frame, the arc extinguishing angle frame is fixed at the end part of the bus bar terminal through bolts, and is connected with the contact line in a parallel mode through a parallel line clamp.

5. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 1, wherein: the electric conduction device is connected with the inductor, and the distance from the inductor to the adjacent neutral section insulating anchor section joint located in the middle position is larger than the distance from the pantograph to the locomotive.

6. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 1, wherein: when the vehicle runs in a single-bow mode, the length of the whole electric phase separation needs to ensure that overvoltage and inrush current are not generated during voltage phase conversion.

7. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 1, wherein: when the vehicle is a double-bow type and the bus runs without reconnection, the length of the whole electric phase separation section is larger than the distance between two pantographs of the vehicle, and the length of the neutral section positioned in the middle position is smaller than the distance between the two pantographs of the vehicle.

8. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device as claimed in claim 1, wherein: when the vehicle is a double-bow type and the bus operates in a reconnection mode, the length of the neutral sections on the two sides is larger than the distance between the two pantographs of the vehicle, and the length of the neutral section in the middle position is smaller than the distance between the two pantographs of the vehicle.

9. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device of claim 8, wherein: the neutral section in the middle position adopts a short anchor section on the premise of meeting the arc extinction function.

10. The long-distance rail transit high-speed overhead rigid contact network electrical phase separation device of claim 8, wherein: the neutral section at the middle position is grounded through the split grounding device.

Technical Field

The invention belongs to the field of rail transit, and particularly relates to a long-distance rail transit high-speed overhead rigid contact network electric phase splitting device.

Background

Along with the continuous extension of the rail transit overhead rigid contact net single line operating mileage, the vehicle operating speed is also continuously promoted. In order to reduce the number of traction power supplies and ensure that the voltage drop of the long power supply arm meets the traction requirement of the vehicle, the traction power supply system preferably adopts an alternating current system.

Two power supply arms of the traction station of the alternating current system adopt different phases for power supply, and an electric phase splitting is required to be arranged at the joint of the two adjacent power supply arms of the traction station in the same interval to realize phase conversion. The electric phase separation of the rigid catenary is a key factor limiting the maximum operating speed of the vehicle.

There are generally two methods for conventional electrical phase separation: anchor segment articulated type and electric split phase insulator type. The anchor section articulated electric phase separation is generally provided with one to two neutral sections, and a vehicle must obey a series of operations such as power failure, bow reduction and the like when passing through the electric phase separation, wherein the anchor section articulated electric phase separation has no arc extinguishing function and is easy to ablate wires. The installation of the electric split-phase insulator has certain requirements on the curve superelevation, the gradient and the like of a line, the installation position is relatively limited, and the installation and leveling are relatively difficult.

The driving requirement of the conventional electric phase separation is not favorable for the high-speed passing of the vehicle. In order to meet the requirement that the vehicle passes through the electric phase splitting at high speed, the automatic electric phase splitting device is generated. According to different design principles, the device is further refined into a ground automatic switching electric phase splitting device, a column-mounted electric phase splitting switching device and a vehicle-mounted electric phase splitting automatic switching device. However, such automatic neutral section passing devices generally have a large number of devices, and some devices have directionality. The construction and maintenance workload is large, and the cost is high.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the overhead rigid contact network electric phase splitting equipment for the long-distance rail transit at high speed, and the requirement that rail transit vehicles stably pass through the rigid contact network electric phase splitting equipment at high speed is met.

The technical scheme adopted by the invention is as follows: the utility model provides a high-speed overhead rigid contact net electric phase separation equipment of long distance track traffic, includes neutral section and electric conduction device, is provided with three neutral section between two power supply arms, power supply arm passes through electric conduction device with its adjacent neutral section and connects, and the neutral section that is located the intermediate position is ground connection.

Furthermore, the power supply arm and the neutral section, and the neutral section are divided through insulated anchor section joints.

Furthermore, a contact line arc extinguishing angle mechanism is arranged on a bus bar terminal of the insulating anchor section joint.

Further, the contact line arc extinguishing angle mechanism is an arc extinguishing angle frame, the arc extinguishing angle frame is fixed at the end part of the bus bar terminal through bolts, and is connected with the contact line in a parallel mode through a parallel line clamp.

Further, the electric conduction device is connected with an inductor, and the distance from the inductor to the joint of the neutral section insulating anchor section adjacent to the inductor and located in the middle position is larger than the distance from the pantograph to the vehicle head.

Further, when the vehicle runs in a single-bow mode, the length of the whole electric phase separation needs to ensure that overvoltage and inrush current are not generated during voltage phase conversion.

Further, when the vehicle is a double-bow type vehicle and the bus runs without reconnection, the length of the whole electric phase separation section is larger than the distance between the two pantographs of the vehicle, and the length of the neutral section positioned in the middle position is smaller than the distance between the two pantographs of the vehicle.

Further, when the vehicle is a double-bow type and the bus operates in a reconnection mode, the length of the neutral sections at the two sides is larger than the distance between the two pantographs of the vehicle, and the length of the neutral section at the middle position is smaller than the distance between the two pantographs of the vehicle.

Furthermore, the neutral section in the middle position adopts a short anchor section on the premise of meeting the arc extinction function.

Further, the neutral section located at the intermediate position is grounded through the separable grounding device.

Compared with the prior art, the invention has the beneficial effects that:

(1) in the aspect of the forming form, 3 neutral sections are arranged, and compared with 1 or 2 neutral sections in the prior art, the proper lengthening of the electric phase separation length can ensure the safe conversion of power supply of different phases when the pantograph passes through, and the overvoltage and inrush current problems caused by automatic phase separation are avoided.

(2) In the aspect of electric arc extinction, the neutral section positioned in the middle position is reliably grounded, and the arc extinction function of the electric phase splitting is realized. A contact wire arc extinguishing angle mechanism is arranged at a bus bar terminal of an insulating anchor section joint to solve the problem of ablation.

(3) In the aspect of equipment installation, the insulating anchor section joint is adopted to replace conventional device type electrical sectioning equipment, the requirements of an electrical phase splitting position on a line curve, a slope and the like are overcome, and the problem of hard points caused by mass concentration points on a contact network is solved.

(4) In the aspect of compatibility and universality, through reasonable setting of the lengths of the three neutral sections, two pantograph network operation modes of a single pantograph and a double pantograph can be compatible simultaneously, and two electrical bus connection modes of double-pantograph operation motor train unit high-voltage bus reconnection and non-reconnection are met.

(5) In terms of vehicle adaptation, the vehicle can pass through the electric phase separation at high speed without any functional adjustment aiming at passing the phase separation.

(6) In the aspect of starting the neutral section, the sensor and the electric conduction device are arranged, so that the vehicle can smoothly run out when the neutral section of the electric phase separation stops under special conditions.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of an electrical phase splitter in accordance with an embodiment of the present invention;

FIG. 3 is a schematic top view of an insulated anchor segment joint according to an embodiment of the present invention;

FIG. 4 is a side view of an insulated anchor segment joint according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a contact line arc extinguishing angle mechanism according to an embodiment of the invention;

FIG. 6 is a schematic side view of a contact line arc extinguishing angle mechanism according to an embodiment of the invention.

In the figure, 1-power supply arm, 2-neutral section A, 3-neutral section B, 4-electrical conduction device, 5-inductor, 6-insulating anchor section joint, 7-bus bar terminal, 8-arc extinguishing angle bracket, 9-bolt, 10-parallel wire clamp and 11-contact wire.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

An embodiment of the invention provides a long-distance rail transit high-speed overhead rigid contact network electrical phase splitting device, which comprises a neutral section and an electrical conduction device 4, as shown in figures 1-6. The whole electric phase is divided into three neutral sections by four insulated anchor section joints 6. A neutral section A2, a neutral section B3 and a neutral section A2 are sequentially arranged between the two power supply arms 1. The neutral section B3 is grounded and the supply arm 1 and its adjacent neutral section a2 are connected by an electrical conduction means 4. The electric conduction device 4 is connected with the inductor 5, and the distance L5 from the inductor 5 to the insulated anchor section joint 6 of the adjacent neutral section B3 of the inductor is slightly larger than the distance L4 from the pantograph to the vehicle head, so that when the vehicle is started when the vehicle is stopped in a neutral area of the electric phase separation, current cannot be led into the neutral section B3 by the pantograph to cause short-circuit tripping. And a contact line arc extinguishing angle mechanism is arranged on a busbar terminal 7 of the insulating anchor section joint 6. The contact wire arc extinguishing angle mechanism prevents the contact wire 11 which is warped upwards from becoming an arc striking angle when a vehicle passes through the insulating anchor section joint 6, so that ablation of wires and busbars is avoided. The contact line arc extinguishing angle mechanism is an arc extinguishing angle frame 8, the arc extinguishing angle frame 8 is fixed at the end part of the busbar terminal 7 through a bolt 9, and is connected with the contact line 11 through a parallel line clamp 10.

Through the adjustment to three neutral section lengths, it passes through electric phase splitting to be applicable to vehicle height under multiple pantograph operating mode:

(1) when the vehicle runs in a single bow mode, the length L3 of the whole electric phase separation needs to ensure that overvoltage and inrush current are not generated during voltage phase conversion.

(2) When the vehicle is a double-bow vehicle and the bus bars are not operated in an reconnection mode, the length L3 of the whole electric phase separation is larger than the distance L between two pantographs of the vehicle, and the length L2 of the neutral section B3 is smaller than the distance L between the two pantographs of the vehicle.

(3) When the vehicle is a double-bow type and the bus operates in a reconnection mode, the length L1 of the neutral section A2 is larger than the distance L between two pantographs of the vehicle, and the length L2 of the neutral section B3 adopts a short anchor section and is smaller than the distance L between the two pantographs of the vehicle on the premise of meeting an arc extinguishing function, so that the length of the electric neutral section without electric coasting is shortened.

The working principle is as follows: when the vehicle stops at any position of the electric phase separation, the sensor 5 shielded by the vehicle body starts to time. When the sensor 5 is timed to exceed the normal passing time and the signal is still shielded by the vehicle body, the sensor 5 is triggered by the signal, the electrical conduction device 4 corresponding to the neutral section A2 is actuated, and the neutral section A2 on the shielded side of the sensor 5 is electrically communicated with the adjacent power supply arm 1. When the vehicle moves forward and the vehicle body does not shield the sensor 5 any more, the sensor 5 sends an off signal, and the electrical conduction device 4 corresponding to the neutral section a2 operates again to electrically disconnect the neutral section a2 on the shielded side of the sensor 5 from the adjacent power supply arm 1.

When the two sensors 5 of the electric phase separation are simultaneously shielded by the vehicle body and the normal passing time is exceeded, the electric conduction device 4 on one side is selected to act to conduct the corresponding neutral section A2, and if the shielding of the sensor 5 is not released within a certain time, the neutral section A2 corresponding to the sensor 5 on the other side is switched to conduct. When the first sensor 5 is not shielded, and the other sensor 5 is still shielded, the neutral section a2 which is originally conducted is disconnected, and the neutral section a2 of the other shielded sensor 5 is switched to be conducted until the other shielded sensor 5 is not shielded by the vehicle body, and then the electrical conduction is disconnected. During the start of the vehicle, the two neutral sections a2 corresponding to the two sensors 5 cannot be simultaneously conducted.

For a double-bow and bus-bar coupled running vehicle, a separable grounding device connected with the neutral section B3 needs to be added when the split-phase neutral section is started. And the grounding is disconnected in the starting process, and the grounding is conducted after the starting is finished.

The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The scope of the invention is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teaching of the technical solutions of the present invention, should be considered to be within the scope of the present invention, and all equivalent changes and modifications made within the scope of the present invention or equivalent technical solutions designed to achieve the above technical effects are also within the scope of the present invention.