EP3239016B1 - System for pushing or retaining a train on steep slopes - Google Patents

System for pushing or retaining a train on steep slopes Download PDF

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Publication number
EP3239016B1
EP3239016B1 EP17000645.6A EP17000645A EP3239016B1 EP 3239016 B1 EP3239016 B1 EP 3239016B1 EP 17000645 A EP17000645 A EP 17000645A EP 3239016 B1 EP3239016 B1 EP 3239016B1
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EP
European Patent Office
Prior art keywords
retain
push
railway line
railway
train
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EP17000645.6A
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German (de)
French (fr)
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EP3239016A1 (en
Inventor
Joze Duhovnik
Janez Mozina
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61J—SHIFTING OR SHUNTING OF RAIL VEHICLES
    • B61J3/00—Shunting or short-distance haulage devices; Similar devices for hauling trains on steep gradients or as starting aids; Car propelling devices therefor
    • B61J3/04—Car shunting or haulage devices with cable traction or endless-chain driving means
    • B61J3/06—Car shunting or haulage devices with cable traction or endless-chain driving means with vehicle-engaging truck or carriage

Definitions

  • the object of the invention is a system and a method for pushing or retaining a train on the steep slopes of a railway line by using a haulage cable and a push/retain assist vehicle. It is a known fact that the adhesion forces of locomotives prevent train compositions from overcoming steep slopes. This is why railways have long lines that make it possible to overcome substantial differences in altitude. Slopes, i.e. inclinations, on conventional railway lines reach up to 25 ⁇ , most commonly up to 17 %o. Today, rack railways are used for slopes up to 140 %o for passenger railway connections, while freight traffic does not go beyond 79 ⁇ . It is understandable that steeper slopes require a more powerful pulling force and this is normally achieved by including two locomotives.
  • the wagons with or without locomotive is coupled to the assist vehicle by specially designed holding devices (22, 23) and after pulling the train and overcoming the steep slope, the train is decoupled from the assist vehicle.
  • the system is using a pulling system with one axis which is not suitable for train compositions of huge masses since the weight of the assist vehicle should be equal to the weight of the locomotive.
  • the task of the invention is a system for pushing or retaining a train that will allow a simple, rapid and reliable driving of a heavy train on a railway line with a steep slope, where differences in height of 300 to 500 m are to be overcome and the length of the railway line will not have to be extended in a spiral loop or by other shapes of curvature.
  • the task is solved by a system according to claim 1.
  • the system allows a continuous drive of a train and the related drive of an assist vehicle by coupling the assist vehicle at the rear side, whereby in the upper section the assist vehicle is automatically disconnected and the train composition drives on without stopping or braking the train composition.
  • a mechanical and electronic system 6 supervises and controls the ascending and descending of the train composition 5.
  • the push/retain assist vehicle 3 is fastened to the steel cable 4 in the upper position and starts accelerating in front of the train composition 5 while descending in a way that the locomotive of the descending train composition 5 reduces the speed and that the essential part of the necessary braking energy is taken over by the push/retain assist vehicle 3 which then takes over all the braking energy during descending and translates it to the force of the steel cables 4 which are connected through huge drive wheels with the engine-generator of the system 6 in such a way as to allow conversion of the mechanical energy to electrical energy.
  • the push/retain assist vehicle 3 in the lower section then moves away from the locomotive of the train composition 5 by increasing the speed in order to reach the railway switch 1 considerably earlier and to move away from the line of the railway tracks, thus making it possible for the special railway switch 1, after the push/retain assist vehicle 3 has passed it, to assume a position, i.e. to switch the railway switch 1 into a position in which the train composition 5 can drive through the railway switch to a normal railway line and to ensure free access for a new train composition for hill climbing.
  • the system of the invention consists of a low-slope railway line with a train composition 5 and of a short railway line parallel thereto with a push/retain assist vehicle 3, both lines being connected by a railway switch 1.
  • the joined line starts from the railway switch 1 along the length of the train composition 5 with a low slope and then passes to a steep slope.
  • the route line of the push/retain assist vehicle 3 is a straight line 2 without any turns throughout the entire length.
  • the push/retain assist vehicle 3 is fastened to the pull cable 4 between the rails of the railway line 2.
  • the railway line passes from a steep slope to the line of a low slope; an engine-generator of the system 6 is arranged at this transition and has a bullwheel for the pulling cable 4.
  • the system for pushing or retaining a train consists of known devices and elements that are used in railroad traffic. By using all the accompanying devices and elements, the system provides for an uninterrupted drive of a train composition from takeover at the entry point at the lower section to discharge the train formation to a conventional railway network at the upper section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Description

  • The object of the invention is a system and a method for pushing or retaining a train on the steep slopes of a railway line by using a haulage cable and a push/retain assist vehicle.
    It is a known fact that the adhesion forces of locomotives prevent train compositions from overcoming steep slopes. This is why railways have long lines that make it possible to overcome substantial differences in altitude. Slopes, i.e. inclinations, on conventional railway lines reach up to 25 ‰, most commonly up to 17 %o. Today, rack railways are used for slopes up to 140 %o for passenger railway connections, while freight traffic does not go beyond 79 ‰. It is understandable that steeper slopes require a more powerful pulling force and this is normally achieved by including two locomotives. The need for a pulling force is considerably increased on steep slopes and this is why slopes not exceeding 17 ‰ are normally used for the railway lines of passenger trains. In the case of steep slopes locomotives having a larger pulling force are used, for instance, a locomotive having a pulling force of 800 k N, which is used for slopes up to 40 ‰.
    For surmounting steeper slopes a rack railway may be used. It exceeds the force for overcoming resistances and gravity by a huge rack, usually with parallel teeth in order to better overcome the load by postponing the splitting.
    There are also known solutions for pulling train compositions using a steel cable for transports up to 8 km. Such solutions are frequently used in cities or local transport at an airport.
    Known solutions for reducing the length of railway lines and consequently increasing the slopes are carried out by using additional locomotives or by an extra increase in friction, which is achieved by spreading rocks or steel shavings or by pushing or retaining with additional pull assist vehicles that transfer the force through a toothed profile.
  • All the prior used systems are limited to low-weight transport, especially to passenger trains. Yet none of the known systems has been used for the huge masses of train compositions and slopes that exceed the slopes known in conventional railway lines by more than three times.
    The best-known solution of pulling and retaining with a steel cable is used in San Francisco, where the use of a steel cable is justified due to steep slopes of up to 200 %o. The loads are relatively small since the weight of the assist vehicles and the passengers is relatively small.
    In DE patent No. 3244017 a system for pulling a train over a steep slope with the assist vehicle is disclosed, wherein the train, i.e. the wagons with or without locomotive, is coupled to the assist vehicle by specially designed holding devices (22, 23) and after pulling the train and overcoming the steep slope, the train is decoupled from the assist vehicle. The system is using a pulling system with one axis which is not suitable for train compositions of huge masses since the weight of the assist vehicle should be equal to the weight of the locomotive.
    The task of the invention is a system for pushing or retaining a train that will allow a simple, rapid and reliable driving of a heavy train on a railway line with a steep slope, where differences in height of 300 to 500 m are to be overcome and the length of the railway line will not have to be extended in a spiral loop or by other shapes of curvature.
  • According to the invention, the task is solved by a system according to claim 1. The system allows a continuous drive of a train and the related drive of an assist vehicle by coupling the assist vehicle at the rear side, whereby in the upper section the assist vehicle is automatically disconnected and the train composition drives on without stopping or braking the train composition. The invention will be described by way of drawings, in which:
    • Figure 1: shows the cross-section of a system according to the invention with the assist vehicle,
    • Figure 2: shows an elevation of the system according to the invention with the assist vehicle.
    The system for pushing or retaining a train on a track with a steeper slope consists of a special railroad switch 1 made of four successive parts, of which two are fixed, connected into a whole, which form a straight line for undisturbed motion of a train composition 5 of conventional dimensions for a certain speed of the train. The system makes it possible such that a curved or a straight transport line of a railway line may be transformed into a completely straight line of a railway line 2 up to the highest elevation point in that after the train composition 5 with its last wagon has completely reached the straight line of the railway line 2, a push/retain assist vehicle 3 comes from the rear side via a special railroad switch 1, and the push/retain assist vehicle 3 moving with a speed corresponding to that of the train comes into contact with the last wagon of the train composition 5 and ensures a transfer of forces up to planned values, and then the push/retain assist vehicle 3 starts pushing or retaining the train composition 5 with all the force ensured by a steel cable 4 transferred to the push/retain assist vehicle 3 by direct contact with the last wagon of the train composition 5. At optimal speed, the pulling force of the locomotive of the train composition 5 is exploited to the maximum and together with the pulling and/or retaining force of the push/retain assist vehicle 3 provides the necessary force to overcome the rolling and all other resistances and the slope component of the weight of the entire train composition 5 until reaching the highest point of the railway line, where the railway line is designed with a slope suitable for a locomotive with all its characteristics. When reaching the upper section of the railway line, the locomotive of the train composition 5 starts accelerating, while the push/retain assist vehicle 3 brakes by directly converting mechanical energy into electrical energy.
  • A mechanical and electronic system 6 supervises and controls the ascending and descending of the train composition 5. The push/retain assist vehicle 3 is fastened to the steel cable 4 in the upper position and starts accelerating in front of the train composition 5 while descending in a way that the locomotive of the descending train composition 5 reduces the speed and that the essential part of the necessary braking energy is taken over by the push/retain assist vehicle 3 which then takes over all the braking energy during descending and translates it to the force of the steel cables 4 which are connected through huge drive wheels with the engine-generator of the system 6 in such a way as to allow conversion of the mechanical energy to electrical energy. The push/retain assist vehicle 3 in the lower section then moves away from the locomotive of the train composition 5 by increasing the speed in order to reach the railway switch 1 considerably earlier and to move away from the line of the railway tracks, thus making it possible for the special railway switch 1, after the push/retain assist vehicle 3 has passed it, to assume a position, i.e. to switch the railway switch 1 into a position in which the train composition 5 can drive through the railway switch to a normal railway line and to ensure free access for a new train composition for hill climbing.
  • The system of the invention consists of a low-slope railway line with a train composition 5 and of a short railway line parallel thereto with a push/retain assist vehicle 3, both lines being connected by a railway switch 1. The joined line starts from the railway switch 1 along the length of the train composition 5 with a low slope and then passes to a steep slope. The route line of the push/retain assist vehicle 3 is a straight line 2 without any turns throughout the entire length. The push/retain assist vehicle 3 is fastened to the pull cable 4 between the rails of the railway line 2. On the upper section, the railway line passes from a steep slope to the line of a low slope; an engine-generator of the system 6 is arranged at this transition and has a bullwheel for the pulling cable 4.
  • The system for pushing or retaining a train consists of known devices and elements that are used in railroad traffic. By using all the accompanying devices and elements, the system provides for an uninterrupted drive of a train composition from takeover at the entry point at the lower section to discharge the train formation to a conventional railway network at the upper section.

Claims (3)

  1. A system for pushing or retaining a train on steep slopes of a railway line, the system comprising a haulage cable and an assist-vehicle, characterized in that the system is formed of a railway line of a low slope, i.e. with an inclination up to 25 ‰, for a train composition (5) and of a railway line for a push/retain assist vehicle (3), wherein said railway line is parallel to the railway line of the low slope, both said railway lines are connected by a railway switch (1) and form one strait joined railway line; the joined railway line starts from the railway switch (1) with a low slope, and then passes to a steep slope, i.e. with an inclination that exceeds the slopes known in conventional railway lines by more than three times, on its upper section, said joined railway line passes at a transition from the steep slope to a joined railway line of a low slope, wherein the route of the push/retain assist vehicle (3) is a straight railway line (2) throughout its entire length; the push/retain assist vehicle (3) is fastened to a pull cable (4); the system further comprising an engine-generator (6) that is arranged at the transition and has a bullwheel for the pulling cable (4), and regulators.
  2. A method for a system according to claim 1 for pushing or retaining a train on steep slopes of a railway line by using a haulage cable and an assist-vehicle, characterized in that, after the train composition (5) with its last wagon in hill climbing has completely passed the railroad switch (1) and reached the straight joined railway line, a push/retain assist vehicle (3) moving with a speed corresponding to a speed of the train composition (5) comes via the railroad switch (1) in contact with the last wagon of the train composition (5), and then the push/retain assist vehicle (3) starts pushing with all the force ensured by the cable (4) transferred to the push/retain assist vehicle (3) by direct contact of the push/retain assist vehicle (3) with the last wagon of the train composition (5), such that the pulling force of the locomotive of the train composition (5) is exploited to the maximum and together with the pulling force of the push/retain assist vehicle (3) provides the necessary force to overcome the rolling resistance and all other resistances and the slope component of the weight of the entire train composition (5) until reaching the upper section of the joined railway line, and when reaching the upper section of the joined railway line, the train composition (5) starts accelerating, while the push/retain assist vehicle (3) stops, wherein when the train composition (5) is descending the push/retain assist vehicle (3) starts accelerating in front of the train composition (5) to come in contact with the locomotive thus the essential part of the necessary braking energy is taken over by the push/retain assist vehicle (3) which translates said braking energy during descending to the force of the pull cables (4) which are connected through bullwheel with the engine-generator (6) of the system in such a way as to enable conversion of the mechanical energy to electrical energy.
  3. A method for a system according to claim 1 for pushing or retaining a train on steep slopes of a railway line by using a haulage cable and a push/retain assist vehicle, characterized in that when the train composition (5) is descending on the joined railway line of the steep slope, the push/retain assist vehicle (3) in the lower section of the joined railway line moves away from the train composition (5) by increasing the speed with regard to the speed of the train composition (5) in order to reach the railway switch (1) earlier and to move away from the joined railway line, thus making it possible for the railway switch (1), after the push/retain assist vehicle (3) has passed it, to switch into position in which the train composition can drive through the railway switch (1) to the railway line and to ensure free access for a new train composition for hill climbing.
EP17000645.6A 2016-04-26 2017-04-14 System for pushing or retaining a train on steep slopes Active EP3239016B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201600120A SI25167A (en) 2016-04-26 2016-04-26 A system for pushing or pulling the train at major inclines

Publications (2)

Publication Number Publication Date
EP3239016A1 EP3239016A1 (en) 2017-11-01
EP3239016B1 true EP3239016B1 (en) 2019-02-20

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ID=59014416

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Application Number Title Priority Date Filing Date
EP17000645.6A Active EP3239016B1 (en) 2016-04-26 2017-04-14 System for pushing or retaining a train on steep slopes

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EP (1) EP3239016B1 (en)
SI (1) SI25167A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110562273B (en) * 2019-10-09 2024-07-12 中建空列（北京）科技有限公司 Abrupt slope driving auxiliary system
CN111775977B (en) * 2020-07-10 2021-10-01 北京天润海图科技有限公司 Boosting damping system of rail car and rail car operation control method
CN113417693B (en) * 2021-07-13 2023-06-13 晋能控股煤业集团同忻煤矿山西有限公司 Safety migration method for mining fully-mechanized mining equipment under steep slope

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE467048C (en) * 1928-10-18 Schenck Und Liebe Harkort Akt Large inclined elevator by means of friction winch
US1125110A (en) * 1914-07-11 1915-01-19 Mcmyler Interstate Company Car-haulage system.
DE3244017C2 (en) * 1982-11-27 1986-04-10 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Transport system for rail-bound wagons on inclined routes
CN2505356Y (en) * 2001-09-24 2002-08-14 马钢(集团)控股有限公司 Hillside railway transportation train set

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3239016A1 (en) 2017-11-01
SI25167A (en) 2017-10-30

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