TANK RAILWAY WAGGON FOR LIQUEFIED GAS TRANSPORTATION

Abstract

 The tank railway waggon for liquefied gas transportation consists of the flange (11) created manhole (10) with the lid (12) fitted and the bolted connection (13) has been used to fix the lid (12) to the flange (11), while the manhole (10) has been located on the tank bottom (9) in the distance (Y) from the tank axis (1) towards the frame (2) and where the lid (12) together with the bolted connections (13) located in the distance (X) does not exceed the end-wall (3).

Description

Technical Field

[0001] The technical solution refers to the tank railway waggon for liquefied gas transportation by train.

Background

[0002] At present, there have been two methods how to place the lid on the tank bottom manhole designed for liquefied gas transportation.

[0003] In the first embodiment, the manhole has been placed onto the tank bottom so as it fully overlaps the tank bottom along with its parts (its contour). The disadvantage of this embodiment is the need to either shorten the tank or extend the whole waggon (undercarriage) to follow distance X required. In the first case, this results to either decrease of the tank volume (its length) or increase in its weight, in the second one.

[0004] The second known embodiment (such as DE 20 2010 013 144 U1) includes flush-mounted manhole together with all of its parts downwards the tank so as the manhole along with its parts shows no enforcement against the tank bottom. Although, this embodiment allows distance X required to be maintained either by shortening the tank or extending the waggon, its disadvantage included full flush-mount into the tank space having a negative impact on both the volume and the manhole position, where its axis descends towards the waggon end-wall which requires the manhole lid to be secured against spontaneous fall out on the operator when loosening all the fastening screws for the maintenance operations.

Engineering solution basis

[0005] In the background art, the engineering solution of the present utility model, of which the basis lies in the fact that the tank waggon consists of the pressure vessel - tank - fitted on the undercarriage frame placed on the travels. The domed bottoms form part of the tank, which have been located on its end-walls. For the cleaning purposes, one of the bottoms features the manhole with the closable lid to carry out inspection and repair of the tank. Following the regulations in force, the manhole shall be placed at the bed bottom part so as to simplify the tank cleaning process.

[0006] To assure safety railway traffic, the main waggon dimensions, such as length, width and height, have been limited with respect to the railway track profile. The other dimensions have also been restricted by the regulations and legislative requirements. Moreover, the maximum distance (X) between the tank bottom and end-walls with the bumpers fitted shall be adhered to, while neither the manhole nor its parts shall exceed the distance under any circumstances. However, it is necessary that the maximum distance (Y) from the tank axis to the manhole lid axis is adhered to.

[0007] The embodiment following the present utility model ensures that the tank waggon for liquefied gas transportation along with the related restrictions is designed in a manner so as to ensure as the biggest tank volume as possible with the waggon having the shortest length and that all the liquefied gas transportation safety standards and regulations are adhered to. One of the bottoms includes the manhole overhanging against the bottom; however, the minimum distance (X) from the end-walls of the waggon has been adhered to at the same time. The manhole fixed on the bottom forms part of the present embodiment. Both tank and manhole axis run in parallel, but divergent run has also been possible.

[0008] The manhole neck welded to the flange forms part of the present embodiment. The flange has been bolted to the manhole lid. As illustrated on Figure 2, the manhole has been positioned so as its top goes beyond the bottom only to a minimum extent in order to keep minimum distance X from the end-wall, while the manhole bottom shows significant overlap, however, minimum distance X from the end-wall has been adhered to, while the manhole is oriented so that the manhole and tank axis run in parallel with adherence to distance Y required.

[0009] The present embodiment allows the tank maximum volume against the waggon length and weight to be achieved, while complying with legislative requirements with increased safety when handling of the manhole lid for the maintenance purposes.

[0010] The present embodiment requires no fully flush-mounted manhole with its part into the tank waggon, as is the case with the other known embodiments, which bears a negative impact on the tank volume. However, the appropriate geometrical arrangement allows distance X required to be achieved from the end-wall in addition to the appropriate manhole horizontal position, where there is no need to additionally assure the manhole lid against fall out when loosening the bolted connections for the tank maintenance purposes. The present embodiment also allows the fitter to exert significantly less power to put the lid into the position necessary to fix it to the manhole flange using the bolted connection when re-installing it.

Figures and drawings overview

[0011] 

Figure 1 shows the side view on the tank waggon for liquefied gas transportation.

Figure 2 shows the tank and manhole axes running in parallel. Figure 3 shows the tank and manhole axes running divergently.

The engineering solution examples

[0012] The tank railway waggon consists of the pressure vessel - tank 1 fixed on the frame 2, located on the travels 6. The domed bottoms 8, 9 form part of the tank 1, which have been located on its end-walls. For the cleaning purposes, one of the bottoms 9 features the manhole 10 with the closable lid to carry out inspection and repair of the tank. Following the regulations in force, the manhole 10 shall be placed at the bed bottom part 9 so as to simplify the tank 1 cleaning process.

[0013] Moreover, minimum distance X between the tank 1 bottoms 8,9 and the end-walls 3 with the bumpers 4fitted shall be adhered to, while neither the manhole 10 nor its parts, such as the lid 12 , shall exceed the distance under any circumstances. However, it is necessary that the maximum distance Y from the tank axis to the manhole lid axis 10 is adhered to.

[0014] The embodiment following the present utility model ensures that the tank waggon for liquefied gas transportation along with the related restrictions is designed in a manner so as to ensure as the biggest tank 1 volume as possible with the waggon having the shortest length and that all the liquefied gas transportation safety standards and regulations are adhered to. One of the bottoms 9 includes the manhole 10 overhanging against the bottom 9, however, the minimum distance X from the end-wall 3. The manhole 10 fixed on the bottom 9 forms part of the present embodiment. Both tank 1 and manhole 10 axis run in parallel, but divergent run has also been possible.

[0015] The manhole neck 10 welded to the flange 11 forms part of the present embodiment. The flange 11 has been connected to the manhole 12 lid 12 using the bolted connection 13. As illustrated on Figure 2, the manhole 10 has been positioned so as its top goes beyond the bottom 9 only to a minimum extent in order to keep minimum distance X from the end-wall 3, while the manhole 10 bottom shows significant overlap, however, minimum distance X from the end-wall 3 has been adhered to, while the manhole 10 is oriented so that the manhole 10 and tank axis 1 run in parallel with adherence to distance Y required.

[0016] The present embodiment allows the tank 1 maximum volume against the waggon length and weight to be achieved, while complying with legislative requirements with increased safety when handling of the manhole 10 lid 12 for the maintenance purposes.

[0017] The present embodiment requires no fully flush-mounted manhole 10 with its part into the tank wagon 1, as is the case with the other known embodiments, which bears a negative impact on the tank volume 1. However, the appropriate geometrical arrangement allows distance X required to be achieved from the end-wall 3 in addition to the appropriate manhole 10 horizontal position, where there is no need to additionally assure the manhole 10 lid 12 against fall out when loosening the bolted connections 13 for the tank 1 maintenance purposes. The present embodiment also allows the fitter to exert significantly less power to put the lid 12 into the position necessary to fix it to the manhole 10 flange 11 using the bolted connection 13 when re-installing it.

Claims

1. The tank railway waggon for liquefied gas transportation consists of the tank (1) fitted on the undercarriage frame (2) placed on the travels (6), where the domed bottoms (8, 9) form part of the tank (1), which have been located on its end-walls, while one of the bottoms (9) includes the manhole (10) is characterized in that the flange (11) forms the manhole (10) with the lid (12) fitted and the bolted connection (13) has been used to fix the lid (12) to the flange (11), while the manhole (10) has been located on the tank bottom (9) in the distance (Y) from the tank axis (1) towards the frame (2) and where the lid (12) together with the bolted connections (13) located in the distance (X) does not exceed the end-wall (3).

2. The tank railway waggon for liquefied gas transportation of claim 1, is characterized in that the manhole axis (10) runs in parallel with that of the tank (1).

3. The tank railway waggon for liquefied gas transportation of claim 1, is characterized in that the manhole axis (10) runs divergently with that of the tank (1).

Drawing