CN114655082A

CN114655082A - Three-rail current collection mode for sectional three-phase power taking

Info

Publication number: CN114655082A
Application number: CN202210243866.XA
Authority: CN
Inventors: 梅逸俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-06-24

Abstract

The invention discloses a three-rail current collection mode for sectional three-phase power taking, relates to a technology for a rail vehicle to take power from an external circuit in rail transit, and belongs to the field of rail transit. The rail car power collector consists of a sectional type conductive rail and a rail car power collector. When the rail car runs, the current collector of the rail car is always in contact with the conductor rail to take power, but the conductor rail is disconnected in a section, only the conductor rail in contact with the current collector is provided with power to provide power, and the non-contact conductor rail is not provided with power.

Description

Three-rail current collection mode for sectional three-phase power taking

Field of the invention

The invention discloses a three-rail current receiving mode for sectional three-phase power taking, relates to a technology for a rail vehicle to take power from an external circuit in rail transit, and belongs to the field of rail transit.

Second, background Art

In the current rail transit vehicles, the subway, light rail and trams which carry people and run are driven by electricity due to high speed, and the traction power supply mode of the trams is not a mode of supplying power by an overhead flexible contact network, an overhead rigid contact network or a third rail. These several types of approaches have certain drawbacks and disadvantages: overhead flexible contact networks and overhead rigid contact networks are required to be provided with electric wires in an overhead manner on the track, various supporting columns and fixing members are required, and the urban landscape is influenced due to the complex structure. In the place that passes through the tunnel, the engineering volume of earthwork has been increaseed owing to the requirement of height to the flexible contact net, receives the influence of factors such as pantograph passing through, wind load, ambient temperature change moreover, and the flexible contact net can produce the vibration, makes contact net spare part be in stress fatigue state for a long time and takes place stress corrosion fracture easily and take place the accident. The hard material that rigid contact net adopted is very high to the requirement of construction installation, and a small error in the work progress all probably causes permanent defect, and the arc problem appears in the bad easy emergence of bow net relation moreover, and the contact net wearing and tearing are also very fast, and the line replacement cycle is short. Although the third rail system has the advantages of good stability and low cost compared with the above-mentioned overhead traveling crane system, the position is low, the electrified rail is exposed to the outside, which is easy to cause personal accidents, and the gap must be reserved at the bifurcation of the running rail, so that the situation that the running of the vehicle is interrupted due to the power failure of the vehicle is easy to occur. The track flat car that can move long distance slightly to carrying the heavy object in factory and mining enterprises will obtain traction power, if adopt the battery mode then have the long problem of battery capacity restriction charge, if adopt the power supply of low pressure track, though having considered the safety problem and face the strict requirement of laying the track insulation, and the road loss, long distance just will increase the problem of copper bar compensation line or transformer number. The various power taking modes are single-phase power taking, the high-power driving motor is three-phase power using, and various conversions are carried out after power taking.

Third, the invention

In view of the existing problems, the invention provides a three-rail current receiving mode for sectional three-phase power taking, which provides the following solutions:

a closed pipeline is fixed between two walking rails of a rail car, a cable line is connected with an external power grid in the pipeline, a conducting strip is uniformly distributed on the cable line at intervals of a plurality of meters, a ring is sleeved on the bottom end of the conducting strip, the other end of the conducting strip is laid on the cable line, a conductor rail is correspondingly embedded on a pipeline cover right above each cable line, the conductor rails are fixedly embedded on the pipeline cover one by one and are exposed outside the pipeline cover, the conductor rails are disconnected and disconnected, and the conductor rails are insulated from the pipeline cover. The bottom of the rail car is provided with a current collecting device which is contacted with the conductive rail to supply power to the rail car. Namely: when the rail car runs, the current collecting device slides through one conductor rail in sequence, when the rail car reaches or passes through one conductor rail, the conducting strip in the pipeline can be erected upwards to be contacted with the conductor rail in a mechanical mode or an induction mode, so that the section of conductor rail is connected with the cable conductor to be electrified, and the current collecting device is contacted with the section of conductor rail to obtain driving power for the rail car; after the rail car leaves the section of the conductive rail, the influence on the conductive sheet below the rail car is not exerted any more, the conductive sheet falls off the conductive rail, and the conductive rail is not electrified any more. That is to say, only one conductive rail in contact with the current collector is electrified during the operation of the rail car, and the rest conductive rails are all electroless.

The sectional type is taken the three rails of electric power and is flowed the mode and directly fixed subaerial, compares simple structure with built on stilts contact net, and maintenance convenient operation is with low costs, because only has the electricity on that conductor rail of current collection device contact, compares with present third rail and has improved personal safety. For the rail flat car, compared with a vehicle-mounted storage battery, the rail flat car can run at any time, and the problems of charging, insufficient electric capacity, limited transportation capacity and the like do not exist; compared with a low-voltage rail power supply mode, the power supply device is simple to lay, does not need redundant voltage reduction and voltage boosting, solves the circuit loss, can directly take power from three phases, and reduces related electrical equipment.

The following is further described with reference to the accompanying drawings.

Description of the drawings

Fig. 1 is a schematic diagram of an overall structure of a three-rail current receiving mode for sectional three-phase power taking.

Fig. 2 is a schematic structural arrangement diagram of the interior of a three-rail current-receiving pipeline for sectional three-phase power taking.

Fig. 3 is a schematic diagram of a three-rail current-receiving pipeline cover for taking power in three phases in a sectional manner.

Fig. 4 is a schematic diagram of the lifting and landing of a three-rail current-receiving type conducting strip for taking power from three phases in a sectional manner.

Fig. 5 is a schematic diagram of a structure of a three-rail current-receiving large insulating pad and a metal conductive tube for sectional three-phase power utilization according to the present invention.

Fig. 6 is a schematic view of a fixing method of a three-rail current-receiving conductive metal pipe for sectional three-phase power supply according to the present invention.

Fig. 7 is a schematic structural view of a three-rail current-collecting collector roller for taking power from three phases in a sectional manner according to the present invention.

Fifth, detailed description of the invention

Referring to figures 1-7 of the drawings: the invention relates to a three-rail current collection mode for sectional three-phase power utilization, which consists of sectional conductive rails and a rail car current collection device. When the rail car runs, the current collector of the rail car is always in contact with the conductor rail to take power, but the conductor rail is disconnected in a section, only the conductor rail in contact with the current collector is electrified to provide power, and the non-contact conductor rail is not electrified.

The invention is embodied as follows: an open-type pipeline (1) is fixed between two running rails of a railway vehicle along a track line, and the pipeline can be fixed on the ground by expansion bolts or fixed by digging a groove and half-burying the groove. The pipeline covers (2) are made of insulating parts above the pipelines, a conductive rail (3) is embedded in the middle of each cover body, and the upper half part of the conductive rail is exposed outside the pipeline covers in a protruding mode. After all the pipeline covers are covered and fixed on the pipeline, a section of conductive rail is fixed on the pipeline, and the conductive rail is segmented section by section and is insulated from and does not contact with each other.

The bottom has ceramic tray (4) of taking the notch in the pipeline, and the overhead cable conductor (5) that has on the tray, the length of cable conductor and pipeline length match, and its one end is connected with external electric wire netting and acquires electric power. The cable is characterized in that a conducting strip (6) is uniformly sleeved on the cable at intervals, a ring is sleeved at the bottom end of the conducting strip and is arranged on the cable, the middle part of the conducting strip is connected with a connecting rod (7) made of an insulating hard material, and a conducting rail (3) is arranged right above the conducting strip. The inner side of the pipeline is provided with a vertical cylinder (8) close to the conducting strip, the upper part of the vertical cylinder is exposed out of the pipeline, the top end of the vertical cylinder is sealed, the opening is provided with a protective cover (9) for shielding rainwater, the vertical cylinder is internally sleeved with a loop bar (11) of which the top end is provided with a roller (10), the top end of the loop bar extends out of the vertical cylinder from the opening of the vertical cylinder and is exposed outside the vertical cylinder, the lower part of the loop bar is connected with a connecting rod (7), and the bottommost end of the loop bar is sleeved with a reset spring (12). The connecting rod is actually a lever and is hinged at the bottom of the pipeline, the hinged part is a supporting point of the lever, the connecting part of the connecting rod and the loop bar is a power arm of the connecting rod, and the connecting part of the connecting rod and the conducting strip (6) is a resistance arm of the connecting rod. The rail car bottom is provided with a sliding pressing plate (13), the sliding pressing plate can firstly contact the roller (10) at the upper end of the sleeve rod (11) to slide and press the roller downwards when the rail car runs, the sleeve rod moves downwards after the roller is pressed to drive the resistance arm of the connecting rod (7) to tilt upwards, so that the conducting strip (6) is vertically contacted with the conductor rail (3), electricity on the cable (5) is conducted to the conductor rail through the conducting strip, and the current collecting device at the rail car bottom is contacted with the conductor rail to obtain running electric power. The current collecting devices are at least two, slide on the conductive rails in tandem, when the current passes through the section between the two conductive rails without electricity, the current passes through the section between the two conductive rails, the current is still on the electrified conductive rails, so that the rail car cannot be electrified, and the length of the sliding pressing plate (13) is larger than the distance between the two adjacent vertical cylinders (8), so that the front end of the sliding pressing plate is in contact with and presses down the sleeve rod in the front vertical cylinder before the rear end of the sliding pressing plate leaves one sleeve rod, and the conductive rails at the front end are electrified and reserved.

When the sliding pressure plate leaves the roller on the sleeve rod, the sleeve rod is not pressed down by the sliding pressure plate, the sleeve rod rises under the action of a return spring (12) at the bottom end of the sleeve rod, so that one end of a resistance arm of the connecting rod is lowered, the conducting strip is driven to be separated from the conducting rail, and the section of the conducting rail is not electrified any more.

The pipeline can make unified prefab through the foundry casting mode, and the whole above-mentioned pipeline of concatenation installation around the job site is gone into to this kind of prefab of multisection, and the concatenation department is lined with rubber mat or silica gel pad, pours into waterproof sealed glue into to guarantee that concatenation department can rain-proof water including covering the whole pipeline behind the pipeline cover. The pipeline cover is also provided with a vertical barrel (8), after the pipeline cover is covered, the vertical barrel and the vertical barrel in the pipeline are combined into a whole vertical barrel sleeved sleeve rod, and meanwhile, the vertical barrel can be higher as much as possible on the premise of not influencing the passing of the rail car for preventing rainwater from being poured into the vertical barrel from an opening at the upper end of the vertical barrel.

In order to solve the problem of electric arc generated when the conducting strip is separated from the conductor rail, one or more of the following measures can be adopted for quickly extinguishing the arc: the cable is connected with alternating current; one end of the conducting strip, which is contacted with the conductor rail, is made into a plurality of fracture contact points; the conducting plate is made of a high-strength high-melting-point material; the return spring on the loop bar is a high-strength spring which can be quickly returned after the external force is removed; the ceramic support block can be made into arc-extinguishing cover shape, its bottom end can be used for supporting cable, and its upper portion is made into several grids to form arc-extinguishing grid.

The contact and separation actions between the conducting strips and the conductor rails are the reaction of the conducting strips when the conducting strips sense that the rail car reaches the position of the rail car or leaves the rail car, the sensing can be in a mechanical mode or an induction mode, and the mode that the connecting rod is driven by the fact that the sliding pressing plate of the rail car is in contact with the lower pressing sleeve rod roller is in a mechanical mode. The induction mode is that a proximity switch is installed at the top end of the vertical cylinder, an electromagnetic valve is installed in the pipeline, a low-voltage power line is laid at the bottom of the pipeline, electricity of the electromagnetic valve and the proximity switch is provided by the low-voltage power line, a push-pull rod made of insulating materials is arranged on the conductive sheet, and a movable iron core of the electromagnetic valve is connected with the push-pull rod. When the electromagnetic valve is connected or disconnected with a power supply, the action generated by the movable iron core can link the push-pull rod to drive the conductive sheet to be lifted to be in contact with the conductive rail or fall to be separated from the conductive rail. The electromagnetic valve is controlled by the proximity switch when the power supply is switched on or off. When the rail car moves close to the switch probe, the switch is switched on, the electromagnetic valve acts to drive the conducting strip to contact with the conductor rail, when the rail car leaves, the probe loses the target, the switch is switched off, and the electromagnetic valve resets to drive the conducting strip to be separated from the conductor rail.

The above summary is the principle and process of the three-rail current receiving mode of the sectional type three-phase power taking, and is a single-rail single-phase power taking. In order to meet the requirement of a three-phase motor in actual operation, the invention can adopt a single-rail three-phase mode to take electricity. Namely: the width of a ceramic supporting block (4) is increased to form three notch openings, three cables are erected and connected with an external power grid, three conducting strips are arranged on each push-pull rod or connecting rod, three conductor rails are correspondingly arranged right above the three cables, the conductor rail which is convexly exposed outside is highest in the middle, the conductor rails on the left side and the right side are lower in the protruding exposure, a front group of current collecting devices and a rear group of current collecting devices are arranged at the bottom of a railcar, and each group of three current collecting devices are respectively in contact with the left, middle and right conductor rails.

The current collecting device has two structural forms, the current collecting shoe is universal for people carrying rail cars with higher running speed such as subway light rails, and the current collecting shoe can be used for collecting electricity in a current collecting roller mode with simple structure for carrying a rail flat car with heavy objects because the running speed of the current collecting shoe is lower: the bottom of the rail vehicle is provided with an insulating pad with a conductive metal pipe, the insulating pad is divided into a large insulating pad and a small insulating pad, the large insulating pad (14) is provided with a groove, the conductive metal pipe (16) is a square pipe and is filled in the groove of the large insulating pad (14), and the small insulating pad (15) is closed to form a whole body which is fixed on the rail vehicle by bolts, so that the metal conductive pipe (16) is fixed on the vehicle and is insulated from the vehicle body. The upper end of the metal conductive tube is connected with each electrical appliance on the vehicle by a lead, and the lower section is elastically connected with the current collection roller by a spring (17). The collector roller (18) is a roller made of a metallic material, which is always in contact with the conductor rail (3) and rolls on the latter as the rail car moves. The upper part of a crankshaft (19) of the current collecting roller is sleeved with a spring (17) and is elastically connected with a conductive metal pipe (16), and when the single-rail three-phase power supply is carried out, in order to prevent the current collecting rollers at two sides from colliding with a conductive rail in the middle when rolling, a rubber anti-collision wheel (20) is arranged on the crankshaft.

Claims

1. The utility model provides a three-rail current receiving mode of electric power is taken to sectional type three-phase which characterized in that: the three-rail current receiving mode of the sectional type three-phase power taking comprises a sectional type conductive rail and a rail car current collecting device, the current collecting device is in contact with the conductive rail to take power for the rail car, but the conductive rail is disconnected in a section, only the conductive rail in contact with the current collecting device is provided with electricity to provide power, and the non-contact conductive rail is not provided with electricity.

2. The three-rail current receiving mode for sectional three-phase power taking according to claim 1, characterized in that: the sectional type conductor rail is characterized in that a closed pipeline is fixed between two walking rails of the rail car, a cable is arranged in the pipeline and connected with an external power grid, the conductor rails which are not connected with each other are embedded on a pipeline cover right above the cable in an insulating mode, and the conductor rails are exposed out of the pipeline cover.

3. The three-rail current receiving mode for sectional three-phase power taking, according to claim 2, is characterized in that: the cable conductor is overhead in the pipeline by a ceramic bracket, and conducting strips are uniformly sleeved on the cable conductor at intervals.

4. The three-rail current receiving mode for sectional three-phase power taking according to claim 1, characterized in that: the power can be provided only by the power on the conductive rail contacted by the current collector, and the power on the non-contacted conductive rail is that the conductive sheet can sense and make vertical motion to be contacted with the conductive rail in a mechanical mode or an induction mode when the railcar reaches the position of the conductive sheet, and sense and automatically fall off to be separated from the conductive rail in the same mode when the railcar leaves.

5. The three-rail current collection mode for sectional three-phase power taking according to claim 4, characterized in that: the conducting strip is mechanically connected with a connecting rod, a vertical cylinder is arranged in the pipeline, a sleeve rod is sleeved in the vertical cylinder, a roller is arranged at the top end of the sleeve rod, a return spring is arranged at the bottom of the sleeve rod, the sleeve rod is connected with the other end of the connecting rod, the middle of the connecting rod is hinged in the pipeline, and a sliding pressing plate is arranged at the bottom of the rail car.

6. The three-rail current receiving mode of sectional three-phase power taking, according to claim 4, is characterized in that: the induction mode of the conducting strip is that a low-voltage power line is laid at the bottom of the pipeline, a proximity switch is installed on a vertical cylinder of the pipeline, an electromagnetic valve is arranged in the pipeline and controls the electromagnetic valve, and a push-pull rod on the conducting strip is connected with a movable iron core of the electromagnetic valve.

7. The three-rail current receiving mode of sectional three-phase power taking, according to claim 1, is characterized in that: the rail car current collecting device is provided with a large insulating pad, a small insulating pad, a groove, a conductive metal tube and a current collecting roller, wherein the conductive metal tube is elastically connected with the current collecting roller, and the side edge of the current collecting roller is provided with a rubber anti-collision wheel.