DESC:DESCRIPTION
STANDARD GUAGE LOW BED TRANSPORTER
FIELD OF INVENTION
[001] The present subject matter described herein, relates to a vehicle to transport heavy equipment in underground metros. The present subject matter in particularly, relates to a standard gauge low bed transporter for movement of heavy equipment in underground metros.
BACKGROUND OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] The transportation of heavy equipment like transformer to the metro/railway stations, once the train is commissioned for passenger service is a difficult task, especially to the underground stations through any other mode of transportation.
[004] The metro system with 3rd rail current collection system needs large sized (approx. 3000 mm height 2000 mm wide) transformers/equipment in underground section, initially installed at open condition of the ground. The movement of faulty transformers/equipments for maintenance and repair can be achieved only through tracks as it is stationed underground.
[005] Also, at underground metro stations moving dimensions are very constrained and sometimes the curves of tracks are really tight.
[006] Hence, there is a need for a Standard Gauge Low bed transporters for equipment transportation like transformer along metro corridors.
[007] The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
OBJECTS OF THE INVENTION
[008] It is therefore the object of the present subject matter to overcome the aforementioned and other drawbacks in prior method/product/apparatus.
[009] The principal objective of the present subject matter is to develop a Standard Gauge Low bed transporter for equipment transportation like transformer along metro corridors.
[0010] Another object of the present subject matter is to develop a Standard Gauge Low bed transporter to transport heavy equipments of capacity of max. 30 tons and maximum height of 2900mm with in Kinematic Envelope (Maximum train movement dimensions) of the Metro corridor both in Elevated and underground section of the metro line.
[0011] Another object of the present subject matter is to develop a Standard Gauge Low bed transporter for smooth transportation.
[0012] Yet another object of the present subject matter is to develop a Standard Gauge Low bed transporter for easy coupling and uncoupling with the metro train or any other locos using in depot.
[0013] Yet another object of the present subject matter is to provide a Standard Gauge Low bed transporter for smooth operation in Service braking and Parking braking.
[0014] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION
[0015] This summary is provided to introduce concepts related to downlight luminaire having light-emitting diodes. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0016] In an embodiment, the present disclosure relates to a standard gauge low bed transporter, for movement of heavy equipment in underground metros comprising a rigid low bed, an underframe structure forming the top surface of the low bed, a bogie system supporting one end of the low bed, a brake system supporting another end of the low bed and a coupler arrangement adjacent to the brake system.
[0017] In an aspect of the invention, the bogie system, the brake system and the coupler arrangement are positioned below the low bed.
[0018] In another aspect of the invention, the under frame structure comprises a main girder, a cross girder, a center still, a longitudinal assembly and a body bolster assembly.
[0019] In another aspect of the invention, the bogie system comprises a bogie frame, a bolster, a suspension and a wheel & axle assembly.
[0020] In another aspect of the invention, the brake system comprises twin pipe compressed air brake system with tread brake units (TBU) mounted on the bogie frame and valves, reservoirs and piping mounted on the bottom of the under frame structure.
[0021] In another aspect of the invention, the coupler system comprises a coupler head, an uncouple device, an air pipe connection for brake pipe, an air pipe connection for main air reservoir pipe and a couple shank with a shock absorber.
[0022] In another aspect of the invention, the automatic couplers are positioned at both ends of the low bed.
[0023] In another aspect of the invention, the load is carried on the body on the floating bolster.
[0024] In another aspect of the invention, the low bed is supported by two bogies with primary and secondary suspension for a smooth operation.
[0025] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0026] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0027] Fig. 1 illustrates isometric view of a Standard Gauge (SG) Low bed transporter according to present subject matter;
[0028] Fig. 2 illustrates static profile of wagon superimposed on kinematic envelop for surface section with ballasted track on level/ constant grade tangent track
[0029] Fig. 3 illustrates side view of Standard Gauge (SG) Low bed transporter.
[0030] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0031] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[0032] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
[0033] As illustrated in the Figure 1 & 3, the body structure of the Standard Gauge (SG) Low bed transporter is of well type, all welded integral construction. The construction comprises of rolled sections, plates, sheets and formed sheet metal sections. The Under frame (101) is capable of taking buffing load in addition to the pay load at all working condition. The maximum stresses are kept well below the permissible limits for these materials. Further protection is provided against corrosion by primer paint and subsequent painting with special paints.
An Example:
[0034] Particular Dimensions of the Standard Gauge Low bed transporter
Sl.
No. Descriptions Dimension
a) Gauge 1435 mm
b) Length over coupler faces 18900 mm
c) Length of Low bed transporter 18000 mm
d) Bogie centers 13400 mm
e) Overall height from rail level 1350 mm
f) Loading Deck height from rail level 850 mm
g) Overall Width 2650 mm
h) Bogie wheel base 2500 mm
i) Wheel Diameter 915 mm
j) Axle Load (Max) 15.0 T
k) Tare weight 25.0 T
l) Carrying capacity 30.0 T
j) Gross weight 55.0 T

[0035] The standard gauge low bed transporter consists of the following systems
• Under frame Structure (101)
• Bogie System (102)
• Brake System (103)
• Coupler arrangement (104)

1. Under Frame Structure (101)
[0036] The construction of 30-ton wagon will be of heavy fabricated welded structure with steel plate flooring. This the main load carrying member of the Low Bed Transporter.
[0037] The Under frame structure (101) of the standard gauge low bed transporter is the main load bearing member. The Under frame structure (101) has been built with a heavy fabricated welded structure with rolled sections, plates, sheets and formed sheet metal sections. Chequered plate flooring provided for antiskid. The Under frame structure (101) of the standard gauge low bed transporter has been designed for carrying the payload of 30 Ton.
[0038] The Under frame structure (101) is divided in to subassemblies such as, Main Girder, cross girder, center sill, Longitudinal assembly & Body bolster assemblies. Different materials used for different structures of the under frame based on the FEM analysis to withstand the loads. Main Girder assembly is made up of using IS:2062 E410C. Cross girder & Longitudinal assemblies are made up of using IS:2062 E250 with Cu and Center Sill is built & coupler pad are using SMA490BW material to achieve High strength.
[0039] The Bolster is fabricated out of IS:2062 E250 with Cu steel plates with copper additive for corrosion resistance, welded together to take up the full load of the super structure under maximum loading conditions
[0040] All other materials and bought out items used in the construction of Low bed transporter is generally conform to the relevant Indian Standard specifications and Indian Railway Standard specifications.

2. Bogie System (102)

[0041] The Standard Gauge Low bed transporter has two no's twin axle bogies of robust, light weight design with welded construction capable of withstanding the maximum static and dynamic stresses under fully loaded condition to meet the performance requirement.
[0042] Axles for these bogies come with self-aligning spherical roller bearings mounted inside cast steel axle boxes and are rigidly guided by Telescopic dashpots and axle guide assemblies. The bogie has two stage suspension, Helical springs working in parallel with dashpot are used in primary suspension and helical springs working in parallel with hydraulic shock absorbers are used in secondary suspension. The Low bed transporter load is carried on floating bolster suspended from the bogie frame and guided between bogie transoms.
[0043] The bolster is secured in the longitudinal direction to bogie frame by means of two anchor links with silent block bushes, located diagonally opposite to each other and transmit draw and braking force between bogie frame and Low bed transporter Underframe through center pivot.
[0044] No weight is transferred through the pivot which merely acts as a center of rotation and transmits pulling and pushing forces and incorporate resilient silent blocks bush to isolate noise from the track. Bogies are designed to ensure safe running in all track conditions of BMRCL.
[0045] Following are the dimensions of an example of a bogie system:
• Rigid wheel base - 2500 mm
• Diameter of wheel on tread - 915 mm
• Axle load - 16 Tons
• Supporting arrangement for coach body - Through side bearers

[0046] The Bogie frame consists of two longitudinal side frames connected by transoms and headstocks at the end and is made up of fabricated sections. Suitable brackets are welded on to the bogie frame for suspension of swing hangers, anchor links and brake cylinders. Bogie frame is made of Structural Steel to IS:2062 E250CuC.
[0047] The bolster beam is fabricated out of steel plates, welded together to take up the full load of the super structure under maximum loading conditions. The Low bed transporter is supported on two side bearers located on a floating bolster which rests on two pairs of helical springs supported on spring planks. The spring planks are suspended from the bogie frame by means of swing links and connected to the bolster beam through equalizing stays. The floating bolster will oscillate transversely at the swing hangers.
[0048] Primary suspension consists of helical springs on axle boxes and mounted between oil resisting rubber pads. The axle box is rigidly guided by telescopic-dashpots and axle guide assemblies. Secondary suspension consists of helical springs firmly located in between the spring plank and bolster. In addition, hydraulic shock absorbers of suitable capacity will be provided.
[0049] Both the axles in each bogie is of 16.25 T capacity and the loading capacity will be limited to 15T as per BMRCL metro cars. The wheels will be solid forged to IRS R-19/93, axles will conform to IRS R-16/95. The tread diameter of the new wheel is 915 mm. Wheel profile is confirmed to RDSO Sketch 91146. Variation in the tread circumference of the wheel on the same axle should not exceed 1.6 mm i.e. 0.5 mm in diameter. Large variation in wheel diameter will lead to biased flange wear. Under the same bogie, the variation in wheel diameter between one pair of wheels and the other should not exceed 5 mm and that between two bogies under the same coach; the maximum variation should be 13 mm.
Features which contribute to improved riding comforts
[0050] Rigidly guided axles mounted on self aligning spherical roller bearings, with practically no play in the longitudinal and lateral directions, helical springs working in parallel with dashpots / shock absorbers of specified characteristics, the diagonally opposite anchor links for guiding the bolster and nearly ideal distribution of the total deflection between primary and secondary suspension obtained for these bogies have all contributed to superior riding comforts. It is therefore essential to ensure that these features are well maintained in service to obtain the desired performance throughout the life of these bogies.
[0051] Riding comfort offered by bogie depends exclusively on above design features and unless bogies are properly maintained and attended to during periodical overhauling at depots, riding deteriorates leading to subsequent heavier and costly maintenance.
3. Brake System (103)

[0052] The Standard Gauge (SG) low bed transporter is provided with twin pipe compressed air brake system, Tread brake units are mounted on bogie frame, Valves, reservoirs, piping etc. are mounted on the bottom of the under frame.
[0053] Tread Brake Unit (TBU) is mounted on the bogie frame (two per axle) with automatic slack adjustment facility to ensure constant gap between wheel and brake shoe. Among four TBUs, two per bogie has air assisted parking brake facility, along with regular service brakes. Stainless steel pipes and Stainless steel end fittings are used for Brake System.
[0054] Service Braking is normally used to control the Low bed transporter motion and to stop the Low bed transporter at every speed. When it is desired to apply the Locomotive and the Low bed transporter brakes, then the Brake Pipe control air pressure is vented through locomotive connected to the Low bed transporter causes a corresponding reduction in pressure on the BP line. The connected BP line will now respond to the BP pressure reduction and react to send a corresponding BC pressure to the Brake Cylinders.
[0055] Parking brake is used to avoid rollout of the Low bed transporter when in stationary. This is applied by heavy coiled spring on the actuator. Parking brake is released when the air pressure is fed to the Parking brake cylinder. Application of parking brake is done through valve provided at either side of the Low bed transporter.
[0056] When a parking brake application is made, the air supply from parking brake cylinders is diverted into service brake portions and is gradually exhausted to atmosphere. This action causes a service brake application first in all the TBUs and PBUs followed by a parking brake application automatically as and when the service brake is released.
4. Coupler System (104)

[0057] The Low bed transporter is equipped with auto coupler arrangement (without electrical head) to facilitate to couple the Low bed transporter with the metro car for Low bed transporter movement. The Automatic couplers are used here, allowing automatic mechanical and pneumatic coupling between Low bed transporter and metro train. The necessary air connections for the Low bed transporter operation is taken through the coupled Metro train. The Auto coupler consists of following subassemblies as,
• Coupler Head
• Uncouple Device
• Air pipe connection for brake pipe
• Air pipe connection for main air reservoir pipe
• Couple shank with shock absorber.

[0058] The Low bed transporter is equipped with auto coupler arrangement (without electrical head) at both the ends to facilitate to couple with the metro train / locos, for Low bed transporter movement/Operation.
• The Low bed transporter is equipped with 2 bogies with primary and secondary suspension which serves in smooth operation.
• The Low bed transporter is provided with TBU - Thread Break units for smooth operation.
[0059] The Low bed transporter is equipped with Automatic Coupler at both the ends, it helps in easy coupling and uncoupling with the metro train or any other locos having same type of coupler.
[0060]
[0061] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[0062] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0063] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.
,CLAIMS:We Claim:
1. A standard gauge low bed transporter, for movement of heavy equipment in underground metros comprising:
a rigid low bed (100);
an underframe structure (101) forming the top surface of the low bed (100);
a bogie system (102) supporting one end of the low bed (102);
a brake system (103) supporting another end of the low bed (103); and
a coupler arrangement (104) adjacent to the brake system.
2. The standard gauge low bed transporter as claimed in claim 1, wherein the bogie system (102), the brake system (103) and the coupler arrangement (104) are positioned below the low bed (100).
3. The standard gauge low bed transporter as claimed in claim 1, wherein the under frame structure (101) comprises a main girder, a cross girder, a center still, a longitudinal assembly and a body bolster assembly.
4. The standard gauge low bed transporter as claimed in claim 1, wherein the bogie system (102) comprises a bogie frame, a bolster, a suspension and a wheel & axle assembly.
5. The standard gauge low bed transporter as claimed in claim 1, wherein the brake system (103) comprises twin pipe compressed air brake system with tread brake units (TBU) mounted on the bogie frame and valves, reservoirs and piping mounted on the bottom of the under frame structure (101).
6. The standard gauge low bed transporter as claimed in claim 1, wherein the coupler system comprises a coupler head, an uncouple device, an air pipe connection for brake pipe, an air pipe connection for main air reservoir pipe and a couple shank with a shock absorber.
7. The standard gauge low bed transporter as claimed in claim 1, wherein automatic couplers are positioned at both ends of the low bed (100).
8. The standard gauge low bed transporter as claimed in claim 1, wherein load is carried on the body on the floating bolster.
9. The standard gauge low bed transporter as claimed in claim 1, wherein the low bed (100) is supported by two bogies with primary and secondary suspension for a smooth operation.