CN109868693B - Design method of flexible guard rail device for mountain rice rail - Google Patents
Design method of flexible guard rail device for mountain rice rail Download PDFInfo
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- CN109868693B CN109868693B CN201910277250.2A CN201910277250A CN109868693B CN 109868693 B CN109868693 B CN 109868693B CN 201910277250 A CN201910277250 A CN 201910277250A CN 109868693 B CN109868693 B CN 109868693B
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Abstract
The invention discloses a design method of a mountain meter-gauge flexible guard rail device, which can accurately determine the setting size of the distance between the guard rail and a steel rail, prevent the derailment of the wheels of a motor train unit on mountain meter-gauge and tooth-gauge composite track railways, reduce the abrasion of the steel rail in a curve section and prolong the service life of the steel rail.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a mountain rice rail flexible guard rail device and a design method thereof.
Background
The mountain rail transit is used as a tour and sightseeing railway, is widely applied to developed countries such as Europe and America, has the characteristics of complex running terrain, high speed, safety, large transportation capacity, strong climbing capability and the like, and mainly adopts a composite rail structure form of a meter rail and a meter rail plus a rack rail. At present, no relevant construction standard and operation experience exist in China, as mountain rail traffic is mainly built under complex terrain conditions such as high mountains, canyons, cliff scarps and the like, a large number of dangerous rail sections such as dangerous bridges, tunnels, high embankments, small-radius curves, long and large ramps and the like exist, the motor train unit is easy to cause the emergency braking or traction failure of the motor train unit in the high-risk rail sections due to the fact that the radius of the curve is too small during running on the high-risk rails to cause the suspension of wheels of the motor train unit and the derailment caused by factors such as damage of gear and rack top teeth or racks of the motor train unit, and the motor train unit can generate serious and accident after derailment under the mountain conditions; the structural stability of the mountain rail is poor, and the maintenance workload of rail work is large; the abrasion of the wheel rail of the curved track is serious, and the service life of the steel rail is short; the steel rail of the long and large ramp section is easy to creep longitudinally; these conditions result in high demands being placed on the safety and maintenance of the mountain track lines.
The existing guard rail equipment is basically suitable for standard gauge rails such as national railways, urban rail transit, special railways and the like, no guard rail equipment specially suitable for mountain rice rails and rice rail and tooth rail composite rail railways exists, due to the difference between the rice rails and the standard gauge, the design method of the standard gauge guard rail equipment is not suitable for the rice rails, and the conditions are harsh, namely a mountain multi-small-radius curve rail (the minimum radius of a positive line is 200m) and a mountain large-gradient rail (the gradient of the conventional railway is not more than 35 permillage, and the maximum gradient of the mountain tooth rail railway can reach 125 permillage), so that a guard rail device suitable for the mountain rice rails needs to be designed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, namely the existing rail protection equipment does not have rail protection equipment specially suitable for mountain rice rails and tooth rail composite track railways, the design method of the standard rail gauge rail protection equipment is not suitable for the rice rails due to the difference between the rice rails and the standard rail gauge, and the conditions are harsh due to a curve rail with a small radius and a large gradient rail in a mountain land, so that a rail protection device suitable for the mountain rice rails needs to be designed to make up the defects, and the flexible rail protection device for the mountain rice rails and the design method thereof are provided.
In order to achieve the above purpose, the invention provides the following technical scheme:
a design method of a flexible guard rail device for a mountain meter rail comprises a guard rail, wherein the guard rail is positioned on the inner side of a steel rail, and the distance X between the guard rail and the steel rail is determined by the following equation:
wherein X is the distance between the guard rail and the steel railThe designed distance between the two-dimensional light source,
the average value of the distance between the guard rail and the steel rails is shown, S is the gauge between the two steel rails, T is the inner side gauge of the wheel set, d is the rim thickness, sigma is the mean square error, N is the guarantee coefficient, and Delta S is the gauge widening value.
The track gauge S between two steel rails in the mountain meter-gauge traffic and the standard track gauge, the wheel pair inner side gauge T, the wheel rim thickness d and other wheel-rail parameters are different, so the calculation methods of the distance X between the guard rail and the steel rail are different. The design distance X between the guard rail and the steel rail of the mountain meter-gauge flexible guard rail device is an average value of the distance between the guard rail and the steel rail calculated according to the wheel-rail parameter track gauge S, the wheel pair inner side gauge T and the wheel rim thickness d in different rail sections and under different conditions
Meanwhile, the deviation is calculated and analyzed by adopting the mean square error of the statistical principle, and then different guarantee coefficients N are selected according to the functional requirements required by a specific flexible guard rail laying section to accurately calculate the design value of the X value of the section; the distance X between the original standard gauge guard rail and the steel rail mainly takes a curve track as a research object, the curve radius R, the speed V and other conditions of a track line are calculated and analyzed, and then the calculation result is combined with parameters obtained by tests to correct an inaccurate range value. The design method of the mountain land meter-gauge flexible guard rail device is suitable for both straight-line and curved-line tracks, and the calculated distance X value between the guard rail and the steel rail is more accurate, so that the design method of the mountain land meter-gauge flexible guard rail device can accurately determine the setting size of the distance between the guard rail and the steel rail, prevent the wheels of the motor train unit from derailing in the mountain land meter-gauge and tooth-gauge combined track railway, reduce the abrasion of the steel rail in the curved section and prolong the service life of the steel rail.
Preferably, when the rail protection device is arranged in a bridge, a high embankment, a long and large ramp, a long and large tunnel and other places, the value of X is set to be larger, the rail protection device mainly plays a rail derailment prevention function, the wheels of the motor train unit are not in contact with the rail protection device under normal working conditions, only when the wheels of the motor train unit are under abnormal working conditions and tend to climb up a steel rail, the wheel rim backs of the wheels of the motor train unit are in contact with the rail protection device, the rail protection device shares a part of transverse force of the wheels of the motor train unit acting on the steel rail, so that the derailment coefficient of the wheels is reduced, and meanwhile, the rail protection device guides the wheels under abnormal working conditions to recover to a normal running track, and plays a role in preventing the wheels of the motor train unit from derail.
Preferably, when the rail guard device is arranged in a small-radius curve section, the value of X is set to be smaller, the stress condition of wheel rails is improved, the service life of the steel rails in the curve section is prolonged, and the derailment of the wheels of the motor train unit is prevented, when the motor train unit is arranged in the flexible rail guard section, the wheel rim back of the wheel of the motor train unit must (or basically) be in proper flexible contact with the working edge of the rail guard device under normal working conditions, so that the rail guard device shares a part of transverse force of the wheels of the motor train unit acting on the steel rails, the transverse force of the wheels of the motor train unit acting on the outer strand steel rails in the small-radius curve is reduced, and meanwhile, under the action of the force of the outer strand steel rails reacting with the wheel of the motor train unit, the wheel guiding force of the motor train unit is changed from the original single guiding force into the double guiding, the wheel-rail impact angle of the wheels of the motor train unit to the outer curved strand steel rail is reduced, the transverse force and the wheel-rail impact angle of the wheels of the motor train unit to the outer curved strand steel rail are reduced, abrasion of the outer curved strand steel rail is reduced, the service life of the outer curved strand steel rail is prolonged, meanwhile, the rail protection device restrains the wheels of the motor train unit, the wheels of the motor train unit are driven in the normal running track direction, and derailment of the wheels of the motor train unit is prevented.
Preferably, the error of the two X values at two adjacent seats connecting the guard rails is 0-5 mm.
Preferably, the distance Y of the top of the upper edge of the guard rail above the top surface of the steel rail is determined by the following equation:
y is the design distance that the top of the upper edge of the guard rail is higher than the top surface of the steel rail, and H1H is the wheel rim height, Δ H is the vertical wear of the rail, Δ s is the vertical wear of the wheel tread, H is the effective height of the guard rail to prevent derailment2The maximum value is required for the bounds.
The design distance Y that the top of the upper edge of the guard rail of the mountain meter-gauge flexible guard rail device is higher than the top surface of the steel rail is determined according to the effective height H of the guard rail for preventing the guard rail from derailing in different track sections and under different conditions1The wheel flange height h, the vertical abrasion delta h of the steel rail and the vertical abrasion delta s of the wheel tread are calculated, the distance Y between the top of the upper edge of the original standard gauge guard rail and the top surface of the steel rail has no related calculation method, and only one 10mm numerical value is given in a unified mode. The Y value obtained by the design method of the mountain rice rail flexible guard rail device is more reasonable.
By adopting the guard rail device, the edge of the working edge of the guard rail is higher than the top surface Y of the steel rail, and when the motor train unit wheel climbs (jumps) the rail under the load shedding (or suspension) working condition, the height of the climbing (or jumping) rail of the motor train unit wheel needs to exceed the effective height H of the flexible guard rail1Derailment is possible, and the derailment studied at present does not exceed H1The condition happens, so that the accident that the wheels of the motor train unit climb (or jump) the rails and get off the line can be effectively prevented.
The invention also provides a mountain rice rail flexible guard rail device which is designed and manufactured by adopting the design method of any one of the mountain rice rail flexible guard rail devices.
The distance X between the guard rail and the steel rail is set according to the length of a large (rail entering section) → a small (fixed section) → a large (rail exiting section).
By adopting the mountain region meter-gauge flexible guard rail device, the setting size of the distance between the guard rail and the steel rail can be accurately determined, the derailment of a motor train unit on mountain region meter-gauge and tooth-rail composite track railways is prevented, the abrasion of the steel rail in a curve section is reduced, the service life of the steel rail is prolonged, the structural stability of the track is enhanced, and the maintenance workload of track work is reduced.
Preferably, the guard rail device further comprises a plurality of pressing plates, each pressing plate corresponds to one support, each pressing plate is connected with the corresponding support through bolts, and the supports are clamped on the steel rail.
Preferably, insulation sheets are arranged between the support and the steel rail and between the pressing plate and the steel rail.
Preferably, a rubber sleeve is arranged between the guard rail and the support.
By adopting the structure, the rubber sleeve can enable the guard rail to have a buffering effect when the wheel rim back is in contact with the guard rail, so that the impact load of a wheel on the guard rail under an adverse working condition is buffered, part of impact damage energy of the wheel on the steel rail on the other side is consumed, and the service lives of the guard rail and the steel rail are prolonged.
Preferably, the rubber sleeve has different grade thicknesses of the front working surface and the rear working surface, so that the value of X can be conveniently adjusted.
Preferably, the guard rail is connected to the support by a bolt.
Preferably, the side surface of the support is provided with a vibration isolation pad.
Preferably, the distance X between the guard rail and the steel rail is 43-75 mm.
Preferably, on the long and large ramp track, the side surface of the support is tightly attached to the sleeper to prevent the steel rail from longitudinally creeping.
Preferably, the support is arranged between two adjacent sleepers on rails such as an overhead bridge, a small-radius curve, a high embankment, a long tunnel and the like.
Preferably, after the rail protection device is installed, the track structure is a frame structure formed by two steel rails and the rail protection device, before the rail protection device is installed, the track structure is mainly a frame structure formed by two steel rails, after the rail protection device is installed, the capacity of resisting the transverse deformation of the track is improved by 41.4%, namely the rigidity of the track structure is improved, and the stability of the track structure is enhanced, so that the damage of a motor train unit to the track is reduced, and the maintenance workload of track work is reduced.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. by applying the design method of the mountain region meter-gauge flexible guard rail device, the setting size of the distance between the guard rail and the steel rail can be accurately determined, derailment of the wheels of the motor train unit on mountain region meter-gauge and tooth-track composite track railways is prevented, abrasion of the steel rail in a curve section is reduced, and the service life of the steel rail is prolonged;
2. by applying the design method of the mountain rice-rail flexible guard rail device, when the guard rail device is arranged in a bridge, a high embankment, a long ramp, a long tunnel and other sections, the value of X is set to be larger, so that the effects of preventing wheels of a train set from derailing, enhancing the structural stability of a track and reducing the maintenance workload of track work are achieved;
3. by applying the design method of the mountain rice rail flexible guard rail device, when the guard rail device is arranged in a small-radius curve section, the value of X is set to be smaller, so that the stress condition of a wheel rail is improved, the service life of a steel rail in the curve section is prolonged, and meanwhile, the effects of preventing wheels of a train set from derailing, enhancing the structural stability of a rail and reducing the workload of maintenance of rail work can be achieved;
4. by applying the design method of the mountain rice rail flexible guard rail device, the distance Y between the top of the upper edge of the original standard gauge guard rail and the top surface of the steel rail has no related calculation method, and only a 10mm numerical value is given in a unified way. The Y value obtained by the design method of the mountain rice rail flexible guard rail device is more reasonable;
5. by using the mountain region meter-gauge flexible guard rail device, the setting size of the distance between the guard rail and the steel rail can be accurately determined, the derailment of a motor train unit on a mountain region meter-gauge and a meter-gauge and cogged-gauge combined track railway is prevented, the abrasion of the steel rail in a curve section is reduced, the service life of the steel rail is prolonged, the structural stability of the track is enhanced, and the maintenance workload of track work is reduced;
6. by adopting the structure, the rubber sleeve is arranged between the guard rail and the support, and can enable the guard rail to have a buffering effect when the rim back of the wheel is in contact with the guard rail, so that the impact load of the wheel on the guard rail under the adverse working condition is buffered, the impact damage energy of a part of wheel on the steel rail on the other side is consumed, and the service lives of the guard rail and the steel rail are prolonged;
7. by applying the mountain rice rail flexible guard rail device, the grade thicknesses of the front working surface and the rear working surface of the rubber sleeve are different, so that the value of X can be conveniently adjusted.
Drawings
Fig. 1 is a schematic structural view of a mountain rice rail flexible guard rail device according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural view of the support;
FIG. 4 is a schematic structural view of the rubber sleeve;
FIG. 5 is a schematic plan view of the support seat attached to the sleeper;
fig. 6 is a schematic plan view of the support between two sleepers.
The labels in the figure are: 1-guard rail, 2-steel rail, 3-support, 4-pressing plate, 5-insulating plate, 6-rubber sleeve, 7-vibration isolator, 8-sleeper and 9-toothed rail.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-6, the design method of the flexible guard rail device for the mountain metric rail according to the present invention includes a guard rail 1, the guard rail 1 is located inside a steel rail 2, a distance X between the guard rail 1 and the steel rail 2 and a distance Y between a top edge of the guard rail 1 and a top surface of the steel rail 2 are respectively determined by the following equations:
wherein X is the design distance between the guard rail 1 and the steel rail 2,
the average value of the distance between the guard rail 1 and the steel rails 2 is shown, S is the track gauge between the two steel rails 2, T is the inner side gauge of the wheel set, d is the wheel rim thickness, sigma is the mean square error, N is a guarantee coefficient, Delta S is the track gauge widening value, Y is the design distance that the top of the upper edge of the guard rail 1 is higher than the top surface of the steel rails 2, H is1Is the effective height of the guard rail 1 for preventing derailment, H is the wheel rim height, delta H is the vertical abrasion of the steel rail 2, delta s is the vertical abrasion of the wheel tread, H2Maximum value required for bounds; and the errors of the two X values at the two adjacent supports 3 connected with the guard rail 1 are 0-5 mm.
As a preferable scheme of this embodiment, when the guard rail device is disposed in a bridge, a high embankment, a long and large ramp, a long and large tunnel, and the like, the value of X is set to be large, so as to prevent derailment of wheels of the train set and enhance structural stability of the track.
As a preferable scheme of this embodiment, when the guard rail device is arranged in a small-radius curve section, the value of X is set to be small, so as to improve the stress condition of the wheel rail, prolong the service life of the steel rail 2 in the curve section, and simultaneously prevent the wheels of the train set from derailing and enhance the structural stability of the track.
By applying the design method of the mountain rice-gauge flexible guard rail device, the setting size of the distance between the guard rail 1 and the steel rail 2 can be accurately determined, the structural stability of the rail is enhanced, and derailment of a train set on mountain rice-gauge and tooth-gauge composite rail railways is prevented.
Example 2
As shown in fig. 1 to 6, the mountain rice rail flexible guard rail device of the present invention is designed and manufactured by the design method of the mountain rice rail flexible guard rail device according to embodiment 1.
This guardrail device includes a plurality of support 3 and a plurality of clamp plate 4, every 3 supports are the cantilever structure spare, every 4 clamp plates correspond one 3 supports, every 4 bolted connection of clamp plate correspond 3 supports will 3 supports joint in on the rail 2, support 3 with between the rail 2 clamp plate 4 with all be equipped with insulating piece 5 between the rail 2, rail 2 sets up on sleeper 8, 8 middle parts of sleeper are equipped with cogged rail 9.
The guard rail 1 is connected to the cantilever end of each support 3 through a bolt, a rubber sleeve 6 is arranged between the guard rail 1 and each support 3, as shown in fig. 5, the rubber sleeve 6 has different grade thicknesses of the front working surface and the rear working surface, so that the adjustment of the value of X is facilitated, by adopting the structure, the rubber sleeve 6 can enable the guard rail 1 to have a buffering effect when the wheel rim back is in contact with the guard rail 1, buffer the impact load of a wheel on the guard rail 1 under an adverse working condition, consume a part of impact damage energy of the wheel on the steel rail 2 on the other side, and prolong the service lives of the guard rail 1 and the steel rail 2.
The distance X between the guard rail 1 and the steel rail 2 is set according to the length of a large (rail entering section) → a small (fixed section) → a large (rail exiting section), the distance X between the guard rail 1 and the steel rail 2 is 43-75mm, and the two guard rails 1 are connected through a fishplate.
The side surface of the support 3 is provided with a vibration isolation pad 7; as shown in fig. 5, on a long and large ramp track, the side surface of the support 3 is arranged to be tightly attached to a sleeper 8, so that the steel rail 2 is prevented from longitudinally creeping; as shown in fig. 6, the support 3 is installed between two adjacent sleepers 8 on a track such as an overhead bridge, a small radius curve, a high embankment, a long tunnel, and the like.
By using the flexible rail protection device for the mountain rice rail, the setting size of the distance between the rail protection 1 and the steel rail 2 can be accurately determined, the structural stability of the rail is enhanced, and derailment of a train set on a mountain rice rail and a rice rail and tooth rail composite rail railway is prevented.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A design method of a flexible guard rail device for mountain rice rails is characterized in that the guard rail device comprises a guard rail (1), the guard rail (1) is positioned on the inner side of a steel rail (2), and the distance X between the guard rail (1) and the steel rail (2) is determined through the following equation:
wherein X is the guard rail (1) The designed distance between the steel rail (2) and the steel rail,
the distance between the guard rail (1) and the steel rails (2) is an average value, S is the track distance between the two steel rails (2), T is the inner side distance of the wheel set, d is the wheel rim thickness, sigma is the mean square error, N is a guarantee coefficient, and △ S is the track distance widening value.
2. The design method according to claim 1, wherein the value of X is set to be larger when the guard rail device is installed in a bridge, a high embankment, a long ramp, a long tunnel section.
3. The design method according to claim 1, wherein the value of X is set smaller when the guard rail device is set in a small radius curve section.
4. The design method according to claim 1, characterized in that the error of the two values of X is 0- ± 5mm at two seats (3) adjacently arranged to connect the guard rail (1).
5. The design method according to any one of claims 1 to 4, wherein the distance Y of the top of the upper edge of the guard rail (1) above the top surface of the steel rail (2) is determined by the following equation:
wherein Y is the design distance that the top of the upper edge of the guard rail (1) is higher than the top surface of the steel rail (2), and H is1Is the effective height of the derailment prevention of the guard rail (1), H is the wheel rim height, △ H is the vertical abrasion of the steel rail (2), △ s is the vertical abrasion of the wheel tread, H2The maximum value is required for the bounds.
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| CN111733636B (en) * | 2020-06-12 | 2021-09-24 | 山东莱钢磁浮列车轨道工程有限公司 | Installation method of multi-track system |
| CN112941984B (en) * | 2021-02-05 | 2022-07-12 | 中铁二院工程集团有限责任公司 | Low-abrasion tooth track transition auxiliary device for tooth track traffic |
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| CN2915915Y (en) * | 2006-05-26 | 2007-06-27 | 王凤林 | Safety protector for use in running of train |
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| KR101588228B1 (en) * | 2013-06-12 | 2016-01-25 | 영중산업 주식회사 | Derailment prevention apparatus for railway vehicles |
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| US8474730B2 (en) * | 2010-02-22 | 2013-07-02 | Progress Rail Services Corp | Track system including a guardrail |
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| CN2823310Y (en) * | 2005-05-09 | 2006-10-04 | 李仲才 | Elastic wear-reducing separation proof rail protector |
| CN2915915Y (en) * | 2006-05-26 | 2007-06-27 | 王凤林 | Safety protector for use in running of train |
| KR101588228B1 (en) * | 2013-06-12 | 2016-01-25 | 영중산업 주식회사 | Derailment prevention apparatus for railway vehicles |
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