• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a gas evacuation mast (1) for a ship, wherein the mast (1) comprises a mast body (2) and a masthead (3) disposed at one end of the mast body ( 2), the mast body (2) and the mast head (3) being hollow tubular structures each having a side wall (4, 5), the mast head (3) comprising a lower part connected to the mast body (2) and an upper portion having an opening (10), the mast body (2) having an upper end portion engaged in the interior space of the masthead (3) through a lower end of the head of the mast (3), the upper end portion of the mast body (2) having an outer dimension in cross-section smaller than the inner cross-sectional dimension of the lower portion of the mast head (3), the head mast (3) also comprising: - a diversion system (13, 14) which is secured by mounting members (15) to the masthead (3) facing the opening (10) in the longitudinal direction of the mast; a peripheral connecting plate (16) extending between the outer surface of the upper end portion of the mast body (2) and the inner surface of the lower part of the masthead, the peripheral connecting plate ( 16) being provided with at least one perforation.
    公开号:FR3073491A1
    申请号:FR1760816
    申请日:2017-11-16
    公开日:2019-05-17
    发明作者:Pierre Houel；Laurent Spittael；Sylvestre Peltier
    申请人:Gaztransport et Technigaz SARL；
    IPC主号:
    专利说明:

    Technical area
    The invention relates to the field of gas evacuation masts for liquefied gas storage installation, in particular liquefied natural gas, and more particularly for liquefied gas transport vessels, for example LNG carriers.
    Technological background
    Liquefied natural gas is generally stored in a tank in liquid form at a pressure close to atmospheric pressure and at a temperature of around -163 ° C, an LNG tanker can contain several tanks of LNG. Each tank is generally connected to an evacuation mast on the upper deck of the ship to allow the escape of evaporated LNG which would otherwise cause inadmissible overpressure in the tank. When escaping through the mast, the gas passes through the body of the mast and then at the top of the mast through an exhaust opening that allows the gas to escape to the atmosphere. However, one of the major drawbacks of this exhaust opening is that it allows rainwater or any other waste to infiltrate through it and therefore to enter the interior of the evacuation mast. . It is therefore necessary to regularly drain your mast to prevent water from accumulating in your mast and thus disturbing the evacuation of the gas.
    summary
    An idea underlying the invention is therefore to prevent rain or sea water from entering the interior of the mast, by discharging it at the level of the mast head. In fact, rainwater causing harmful effects on the evacuation mast and its efficiency in evacuating the gas, it is possible to provide means making it possible to divert rainwater from the interior of the mast and / or means for discharging water, for example holes at the bottom of the masthead, for discharging water which has entered the masthead.
    However, it is also necessary to prevent the gas from being evacuated excessively by these means of evacuation because there would be risks of gas projection towards the bottom of the storage installation where the operators are located. An advantage of the invention is to limit these risks associated with the projection of gas from the masthead to the bottom of the storage installation where the operators are located, while continuing to efficiently evacuate rainwater from the masthead.
    According to one embodiment, the invention provides a gas discharge mast for a ship, in which the mast comprises a mast body and a mast head arranged at one end of the mast body, the mast body and the mast head being hollow tubular structures each comprising a side wall, the mast head comprising a lower part connected to the mast body and an upper part comprising an opening allowing the gas to be evacuated, the mast body having a portion of upper end engaged in the interior space of the mast head through a lower end of the mast head, the upper end portion of the mast body having an outer dimension in cross section smaller than the inner dimension in cross section from the lower part of the mast head, the mast head also comprising:
    - a water diversion system which is fixed by mounting elements to the mast head opposite the opening in the longitudinal direction of the mast to divert a flow of water away from the mast body towards or from the opening in the longitudinal direction of the mast;
    - a peripheral connection plate extending between the external surface of the upper end portion of the mast body and the internal surface of the lower part of the mast head to collect a residual flow of water flowing on the internal surface ia of the mast head, the peripheral connection plate being provided with at least one perforation to evacuate the flow of residual water outside the mast.
    Thus, the evacuation mast makes it possible to efficiently evacuate the gas while preventing rainwater from entering the body of the mast thanks to the water diversion system and the perforation of the connection plate located at the level from the masthead. In addition, the peripheral connection plate has the advantage of limiting the open section in the lower part of the masthead and thus limiting the possible quantity of gas which could be evacuated by the lower part and could be dangerous for the operators working for example on the upper deck of the ship.
    The diversion system makes it possible first of all to divert a main flow of water which would penetrate in the longitudinal direction of the opening of the mast head, thereby protecting the interior of the evacuation mast from the greatest amount of rainwater and thus limit or avoid any need to drain the evacuation mast which is an expensive and complex operation. The invention therefore makes it possible to avoid or at least limit this emptying step and to simplify the maintenance of the evacuation masts.
    If the main flow is well diverted from the interior of the mast by the diversion system, there may still remain a residual flow of rainwater which has not been affected by the diversion system and which flows along the internal surface of the mast head, this is why the system comprises a perforation at the level of the lower part of the mast head, the perforation making it possible to evacuate the residual water flow outside the mast.
    In addition, the fact that the perforation is formed in a peripheral connection plate has an advantage. Indeed, during the evacuation of significant gas by the evacuation mast, a residual flow of gas may be caused to take the path leading to the lower part of the mast head. If this flow were to be evacuated at this level in too large a quantity, it would be dangerous for the operators because it would be directed towards the operators being below the mast, it is therefore advantageous to control this residual flow of gas. Thus, the peripheral connection plate makes it possible to limit this residual flow of gas by limiting it to the passage of the perforation of the connection plate.
    According to embodiments, such a gas evacuation mast may include one or more of the following characteristics.
    According to one embodiment, the upper and lower parts of the masthead are of frustoconical shape converging and diverging in the direction of the gas flow.
    According to one embodiment, the mast head and the mast body are made of stainless steel.
    According to one embodiment, the side wall of the lower portion of the mast head and the connecting plate form a gutter surrounding the upper end portion of the mast body.
    Thanks to these characteristics, the residual flow is not only evacuated at the level of the gutter by the perforation but also a quantity of water can be contained in the gutter which then serves as a reservoir to allow time for the water to evacuate. by perforation in case of excess. Indeed, depending on the amount of water received from the residual flow of water by the gutter, it is possible that the perforation is not sufficient to immediately evacuate the water, the gutter therefore has the advantage of containing water awaiting evacuation by perforation.
    According to embodiments, the diversion system can be located inside or outside the mast head. According to one embodiment, the diversion system comprises a water recovery device, preferably in the form of a funnel, and a drainage device, preferably in the form of a pipe, making it possible to empty the device. recovery outside the masthead.
    According to one embodiment, the drainage device is inclined at a non-zero angle relative to the horizontal so as to allow the evacuation of the water from the recovery device, preferably the angle measures 15 °.
    When placed inside the masthead, the recovery device allows the effective recovery of all the water coming from the main flow of water and which is returned by the opening of the upper part of the head. In addition, thanks to its funnel shape, it allows the water to gather naturally in its center to facilitate its evacuation. The water can then be routed through the hose-shaped drainage device out of the masthead. The shape of the drainage device allows the water to be evacuated in a watertight manner while taking up little space in the masthead, which prevents the drainage device from interfering with the evacuation of gas.
    According to one embodiment, the diversion system is located above or below and at a distance from the opening, the diversion system having an external dimension in cross section greater than the dimension in cross section of the opening. Preferably, the diversion system has a curved plate or is cone-shaped.
    The diversion system thus designed in this embodiment allows the system to directly divert the main flow of water directed to or from the opening. Indeed, the system here acts as a roof above or below the opening preventing water from passing directly through the opening or preventing water passing through the opening from reaching the body of mast.
    According to one embodiment, the head and the mast body are fixed to each other by means of flat fixing supports distributed all around the internal surface of the mast head and extending between the surface internal of the mast head and the external surface of the mast body.
    Thanks to these characteristics, the mast head and the mast body are firmly fixed to each other by the supports so as to guarantee the stability of the connection and thus allow the mast to withstand the forces subjected to its use on a gas transport ship. In addition, the fixing supports can be fixed by welding to the mast head and to the mast body.
    According to one embodiment, the fixing supports extend parallel to the longitudinal direction of the mast, the fixing supports being configured to delimit different gutter segments, the fluid communication between the different gutter segments being ensured by support holes provided in the mounting brackets.
    The support holes therefore make it possible to prevent certain segments which in a configuration having no perforation, from filling up without being able to evacuate the water which would accumulate there. Indeed, the support holes then allow all the segments to communicate with each other, so it is not necessary to have a perforation at the level of each segment of the gutter.
    According to one embodiment, the support holes are located at a lower end of the fixing supports.
    According to one embodiment, the fixing supports are eight in number.
    The distribution of the fixing supports makes it possible to share the load and the stresses applied to each support so as to increase their lifespan and make the structure more stable.
    According to one embodiment, the mounting elements are flat bars, preferably eight in number distributed all around the internal surface of the mast head and oriented parallel to the longitudinal direction of the mast.
    The distribution of the mounting elements makes it possible to share the load and the stresses applied to each element so as to increase their service life and make the structure more stable. In addition, the flat bar shape parallel to the longitudinal direction has the advantage of avoiding as much as possible disturbing the evacuation of gas by taking up little space in thickness.
    According to one embodiment, the mast head comprises a grid located at the opening of the upper part of the mast head so as to filter the flow of water going towards the opening.
    The grid prevents any waste larger than the grid spacing from entering the evacuation mast. In addition, it also avoids a flashback phenomenon inside the mast which can damage the evacuation mast.
    According to one embodiment, the mast head has a parameter _ if the lower opening P defined by the following equation: P = -, with S1 representing the total area, that is to say cumulative, of the at least one perforation of the peripheral connection plate and S2 representing the total area of the opening of the upper part of the mast head; the lower opening parameter P making it possible to quantify the size of the lower opening relative to the opening of the upper part of the masthead, this parameter P being less than or equal to 0.01.
    According to one embodiment, the opening parameter P is less than or equal to 0.005.
    Preferably, the total area S1 of the perforation (s) is greater than or equal to 0.5 cm 2 and the area S2 of the opening of the upper part of the masthead is greater than or equal to 150 cm 2 .
    The lower opening parameter allows you to clearly quantify the extent to which the lower opening of the mast head is reduced compared to the opening of the upper part of the mast head.
    According to one embodiment, the mast head comprises three peripheral connection plates distributed all around the mast head, the plates each being provided with at least one perforation and each being fixed to one another so as to that the side wall of the lower portion of the mast head and the connecting plates form a gutter surrounding the upper end portion of the mast body.
    These characteristics make it easier to assemble the plates, since the assembly of several connecting plates extending over a portion of the contour of the mast body is easier than the assembly of a single large plate all around the mast body.
    According to one embodiment, the invention also provides a ship for transporting a cold liquid product, the ship comprising a double hull, a tank arranged in the double hull and at least one gas evacuation mast according to the invention connected to the tank, the at least one mast being located on an upper deck of the ship and allowing gas to be evacuated to the atmosphere in the event of overpressure in the tank.
    Brief description of the figures
    The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly during the following description of several particular embodiments of the invention, given solely by way of illustration and without limitation. , with reference to the accompanying drawings.
    - Figure 1 shows a side view of a ship carrying liquefied natural gas equipped with evacuation masts.
    - Figure 2 shows a top view of a mast head comprising a diversion system according to a first embodiment.
    - Figure 3 shows a sectional view of a mast head along the plane AA of Figure 2.
    - Figure 4 shows a schematic view of a mast head comprising a diversion system according to a second embodiment
    - Figure 5 is a front view of a mounting element.
    - Figure 6 is a front view of a fixing support provided with a support hole.
    - Figure 7 is a side view of a fixing support provided with a support hole.
    - Figure 8 shows a top view of a peripheral connection plate provided with a perforation
    - Figure 9 shows a simulation of the flow of gas from an evacuation mast according to one embodiment.
    - Figure 10 is a cutaway schematic representation of an LNG tank and a loading / unloading terminal of this tank, the ship being equipped with evacuation masts.
    Detailed description of embodiments
    In the description and the claims, the terms "upper", lower "," above "and" below "must be interpreted in the longitudinal direction of the mast, and in the direction from the mast body towards the mast head.
    FIG. 1 represents a vessel 70 for transporting liquefied natural gas (LNG) which comprises several tanks 71 mounted in the hull 72 of the ship 70. The LNG stored in the tanks evaporates continuously increasing gradually the pressure inside tanks 71, which creates in the tank a liquid phase and a gas phase.
    To avoid damaging the tanks 71 and to avoid any risk of leakage, a pressure relief valve is arranged at the level of each tank 71. This valve is closed by default and opens under the control of a valve pilot when the pressure inside the tank exceeds a predetermined value. Part of the gas is then discharged from the tank, it can then be either used by the ship for its propulsion system, or directly discharged to the atmosphere via discharge masts 1 located on the upper deck 81 of the ship 70 and which are connected to the tank 71 via the pressure relief valve.
    A discharge mast is composed of a mast body 2 and a mast head 3. The mast body 2 is formed of a hollow tubular structure comprising a body side wall 4. In the same way, the the head of the mast is formed by a hollow tubular structure comprising a side wall of the head 5. The gas which is evacuated via the evacuation masts then first passes through the mast body 2 then through the mast head 3 which has an opening 10 communicating with the atmosphere, the gas being evacuated via this opening 10.
    The evacuation masts 1 on a ship 70 carrying LNG, for example an LNG carrier, or any LNG storage installation, are high enough to allow the gas escaping from the masthead 3 to be removed from the upper deck 70 or from the ground respectively, for safety reasons. Indeed, operators can be present on the upper deck 70, it is necessary for their safety that the gas is discharged far enough from the deck 81. For example, on an LNG carrier, the evacuation masts 1 are generally more than ten meters in height.
    During rain, storms or any other event allowing water to enter via the opening of the masthead 3, the water is brought inside the evacuation mast 1. This infiltration of water can cause several problems, on the one hand rainwater can prevent efficient gas evacuation by accumulating inside the mast, on the other hand rainwater can damage the mast of the inside, and finally it can force the mast to be emptied to evacuate the accumulated water, which is a fairly complex and costly operation. It is therefore necessary to install means to prevent any infiltration of rainwater into the evacuation mast 1. To prevent water from seeping into the body of mast 2 or further into the system gas discharge connected to the tank, it is possible to install these means directly on the mast head 3.
    The mast 1 and in particular the mast head 3 is shown in FIGS. 2 and 3 according to a first embodiment where one can distinguish the different constituent elements of the head 3. The mast head 3 is composed of a part lower 8 and an upper part 9, these parts being of frustoconical shape. These two frustoconical parts are assembled with each other at their end where their diameter is the largest, so that the assembled head is a larger diameter at the level of the assembly of the two upper parts 9 and lower 8. The mast head 3 is equipped here with two means allowing the head to evacuate rainwater out of the evacuation mast 1.
    In addition, as shown in Figure 3, the mast head 3 has a grid 18 located at its opening 10. This grid 18 has two uses here. First of all, it prevents any waste larger than the spacing of the grid 18 from entering the evacuation mast. In addition, it also makes it possible to avoid a possible phenomenon, flashback inside the mast which can damage the evacuation mast 1.
    According to this embodiment, the first means is a diversion system 12 comprising a recovery device 13 and a drainage device 14. The recovery device 13 is fixed to the side wall 5 of the mast head 3 by elements of mounting 15. These mounting elements 15 are distributed equitably on the mast head 3 to allow the recovery device 13 to be optimally fixed.
    The recovery device 13 is in this configuration located inside the masthead 3 so as to recover a large part of the water which would have infiltrated inside the masthead by the main flow of water coming in a longitudinal direction at the opening. In addition, the recovery device 13 is located at a distance from the opening 10 to release a passage where the gas can be evacuated. In order to interfere as little as possible with the evacuation of the gas, the masthead 3 has a larger section at the level where the recovery device 13 is located so that the gas can be evacuated despite the presence of the recovery 13 on its trajectory. The recovery device 13 has an axis of revolution and has an outside diameter at the level of these fasteners with the mounting elements equal to the diameter of the opening 10 so as to optimize the recovery of rainwater with the least disturbance. gas evacuation possible.
    In FIG. 3 which represents an embodiment of the evacuation mast 1, it is possible to distinguish the shape of the recovery device, namely a form of funnel which is located in the center of the mast head 3, the part la the more open part of the funnel being close to the opening 10, the most closed part being connected to the drainage device 14 so as to discharge the water accumulated in the recovery device 13.
    The drainage device 14 is in the mode presented in FIG. 3, in the form of a pipe connecting the recovery device 13 to the outside of the mast head 3, which makes it possible to efficiently evacuate the water accumulated in the recovery device 13. The drainage device 14 therefore crosses the head side wall 5 in its lower part 8 to open outside the mast head 3. The drainage device 14 is also inclined at an angle not zero with respect to the horizontal so as to allow the evacuation of the water from the recovery device 13 naturally.
    The lower part 8 of the mast head 3 is fixed to the mast body 2 by means of fixing supports 6 visible in FIG. 4. In the same way as the mounting elements 15, the fixing supports 6 are distributed equitably on the periphery of the mast head 3 so as to make the fixing between the head 3 and the body 2 robust and stable. In addition, the mast body 2 has an upper end portion engaged in the interior space of the mast head 3 through a lower end of the mast head 3, the upper end portion of the mast body 2 has an outer dimension in cross section smaller than the inner dimension in cross section of the lower part of the mast head 3 thus allowing the mast head 3 to be assembled on the side wall 4 of the mast body 2. The mast head 3 thus partially covers the mast body 2. The fixing supports 6 thus create a gap between the lower end of the lower part 8 of the mast head 3 and the mast body 2, this gap representing one of the lengths of the fixing supports 6. The gap thus created is voluntary because it partially represents the second means of evacuation.
    The mast head 3 also comprises a peripheral connecting plate 16 extending between the outer surface of the upper end portion of the mast body 2 and the inner surface of the lower part of the mast head 3 to collect a flow. residual water flowing over the internal surface of the mast head 3, the peripheral connecting plate 16 being provided with a perforation 17 for discharging the residual water flow outside the mast 1. The side wall of the lower portion of the mast head 3 and the connecting plate 16 thus form a gutter 11 surrounding the upper end portion of the mast body 2.
    The gutter 11 which can be seen in FIG. 3 is therefore located between the fixing supports 6 where the gap is located between the mast head 3 and the mast body 2. It allows all the water which n 'would not have been recovered by the drainage system 12 and which would trickle down on the internal walls of the mast head 3 via the perforation 17. In this way, the two rainwater drainage means act in a complementary manner and prevent rainwater from reaching the inside of the mast body 2.
    In this embodiment represented in FIG. 3, the fixing supports 6 are eight in number and thus divides the gutter 11 into eight segments. In addition, the gutter 11 is of sufficient size to allow all the water which collects. would fall between the mast head 3 and the exhaust system 12, for example in the event of rain which would have a direction other than the longitudinal direction of the mast 1. This sufficient size has a drawback in the event of strong evacuation of gas which could have place during an incident on the storage installation. Indeed, in this case, a residual flow of gas can be evacuated by the gutter 11 because the flow then has a high speed and by striking the diversion system 12, it can take the direction of the gutter 11, as visible in FIG. 8 which represents a simulation of the gas circulation when the invention is subjected to a strong gas evacuation. The residual flow is then directed towards the bottom of the storage installation and presents a danger to operators. This is why the connection plates 16 also have the role of limiting this residual flow by only allowing it to pass through the perforation 17. The residual flow is then considerably reduced and no longer presents a danger to operators.
    FIG. 4 represents a schematic view of an evacuation mast comprising a diversion system according to a second embodiment. In this embodiment, the diversion system 12 is located above and at a distance from the opening. The system 12 is therefore here located outside the mast head 3. The diversion system 12 has an outer dimension in cross section greater than the dimension in cross section of the opening 10 thus allowing the system to have the function equivalent to a roof of a building. Unlike the first embodiment, the second embodiment allows the main flow of water to be diverted before it enters the masthead 3. The diversion system 12 can be, for example, a curved plate or a cone-shaped element. The diversion system 12 can be fixed to the mast head via mounting elements 15 which would fix the ends of the system 12 to the external side wall 5 of the mast head 3.
    FIG. 5 represents a mounting element 15 which allows the diversion system 12 to be fixed to the mast head 3. The mounting element 15 is in the form of a flat bar. The end of the mounting element 15 which is in contact with the mast head is inclined so as to facilitate its attachment to the mast head which is composed of two frustoconical parts.
    Figures 6 and 7 show a fixing support 6. In the embodiment shown, the fixing support 6 is provided with a support orifice 7 which allows the water contained in a first segment of the gutter 11 to be able flow into a second gutter segment 11, the two segments being separated by the fixing support 6. The support orifice 7 therefore makes it possible to prevent certain segments which in a configuration would have no perforation 17, from fill without being able to evacuate the water which would accumulate there.
    FIG. 8 represents a peripheral connection plate 16 provided with a perforation 17. In the embodiment presented, the connection plate 16 is in the form of an arc of a circle so that when it is assembled with other plates link 16 formed an annular plate.
    Example dimens.io.nn
    In one embodiment, the mast 1 can have the following dimensions:
    Diameter of the opening 10 in the upper part: 700mm
    Diameter of the junction of the upper and lower parts: 1300mm
    Diameter of the lower end of the lower part: 800mm
    Mast body diameter 2: 610mm
    Diameter of the water recovery device 13: 800mm
    Height of the upper part: 200mm
    Height of the lower part: 600mm
    Gutter height 11: 100mm
    Width of the connection plate 16: 105mm
    Number of holes 17: 3
    Diameter of a hole 17: 25mm
    FIG. 9 represents a simulation of the gas circulation of an evacuation mast 1. This figure illustrates a diagram of an evacuation mast 1 in a simplified version where it is possible to distinguish the main flow of gas which comes from the mast body 2 and goes towards the opening 10 of the upper part of the mast head 3 as well as the residual flow which comes from the mast body 2 and goes towards the opening of the lower part of the head of mast 3 where the connecting plate 16 is normally arranged. The role of the plate 16 is therefore to block this residual gas flow while allowing the residual water flow to be evacuated by the perforation 17.
    With reference to FIG. 10, a cutaway view of an LNG tanker 70 shows a sealed and insulated tank 71 of generally prismatic shape mounted in the double hull 72 of the ship. The wall of the tank 71 comprises a primary waterproof barrier intended to be in contact with the LNG contained in the tank, a secondary waterproof barrier arranged between the primary waterproof barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the primary waterproof barrier and the secondary waterproof barrier and between the secondary waterproof barrier and the double shell 72.
    In a manner known per se, loading / unloading lines 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a maritime or port terminal for transferring a cargo of LNG from or to the tank 71.
    FIG. 10 shows an example of a maritime terminal comprising a loading and unloading station 75, an underwater pipe 76 and a shore installation 77. The loading and unloading station 75 is a fixed offshore installation comprising an arm mobile 74 and a tower 78 which supports the mobile arm 74. The mobile arm 74 carries a bundle of insulated flexible pipes 79 which can be connected to the loading / unloading pipes 73. The mobile arm 74 can be adjusted to suit all LNG tankers' sizes . A connection pipe, not shown, extends inside the tower 78. The loading and unloading station 75 allows the loading and unloading of the LNG carrier 70 from or to the onshore installation 77. This comprises liquefied gas storage tanks 80 and connecting pipes 81 connected by the submarine pipe 76 to the loading or unloading station 75. The submarine pipe 76 allows the transfer of the liquefied gas between the loading or unloading station 75 and the shore installation 77 over a long distance, for example 5 km, which makes it possible to keep the LNG carrier 70 at a great distance from the coast during the loading and unloading operations.
    To generate the pressure necessary for the transfer of the liquefied gas, pumps on board the ship 70 and / or pumps fitted to the shore installation 77 and / or pumps fitted to the loading and unloading station 75 are used.
    Although the invention has been described in connection with several particular embodiments, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these are within the scope of the invention.
    The use of the verb "behave", "understand" or "include" and its conjugate forms do not exclude the presence of other elements or steps than those set out in a claim.
    In the claims, any reference sign in parentheses should not be interpreted as a limitation of the claim.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Gas evacuation mast (1) for a ship (70), in which the mast (1) comprises a mast body (2) and a mast head (3) disposed at one end of the mast body ( 2), the mast body (2) and the mast head (3) being hollow tubular structures each having a side wall (4, 5), the mast head (3) comprising a lower part connected to the mast body (2) and an upper part having an opening (10) for discharging the gas, the mast body (2) having an upper end portion engaged in the interior space of the mast head (3) through a lower end of the mast head (3), the upper end portion of the mast body (2) having an outer dimension in cross section smaller than the inner dimension in cross section of the lower part of the mast head (3), the mast head (3) also comprising:
    - a water diversion system (12) which is fixed by mounting elements (15) to the mast head (3) opposite the opening (10) in the longitudinal direction of the mast to divert away from the mast body (2) a flow of water towards or from the opening in the longitudinal direction of the mast;
    - a peripheral connection plate (16) extending between the outer surface of the upper end portion of the mast body (2) and the inner surface of the lower part of the mast head to collect a flow of water residual trickling on the inner surface of the mast head (3), the peripheral connection plate (16) being provided with at least one perforation (17) for discharging the residual water flow outside the mast.
    [2" id="c-fr-0002]
    2. Evacuation mast (1) according to claim 1, wherein the side wall of the lower portion of the mast head (3) and the connecting plate (16) form a gutter (11) surrounding the portion of upper end of the mast body (2).
    [3" id="c-fr-0003]
    3. Evacuation mast (1) according to claim 1 or 2, wherein the diversion system (12) is located inside or outside the mast head (3) and comprises a recovery device water (13), preferably in the form of a funnel, and a drainage device (14), preferably in the form of a pipe, for emptying the recovery device (13) outside of the mast head (3).
    [4" id="c-fr-0004]
    4. Evacuation mast (1) according to claim 1 or 2, wherein the diversion system (12) is located above or below and at a distance from the opening (10), the diversion system ( 12) having an outer cross-sectional dimension greater than the cross-sectional dimension of the opening (10), preferably, the diversion system (12) has a curved plate or is cone-shaped.
    [5" id="c-fr-0005]
    5. Evacuation mast (1) according to any one of the preceding claims, in which the mast head (3) and the mast body (2) are fixed to one another by means of supports. fixing (6) dishes distributed all around the internal surface of the mast head (3) and extending between the internal surface of the mast head (3) and the external surface of the mast body (2).
    [6" id="c-fr-0006]
    6. Evacuation mast according to claims 2 and 5, wherein the fixing supports (6) extend parallel to the longitudinal direction of the mast, the fixing supports (6) being configured to delimit different gutter segments (11 ), the fluid communication between the different gutter segments (11) being provided by support orifices (7) formed in the fixing supports (6).
    [7" id="c-fr-0007]
    7. Evacuation mast (1) according to claim 5 or 6, in which the fixing supports (6) are eight in number.
    [8" id="c-fr-0008]
    8. Evacuation mast (1) according to any one of the preceding claims, in which the mounting elements (15) are flat bars, preferably eight in number distributed around the internal surface of the mast head. (3) and oriented parallel to the longitudinal direction of the mast.
    [9" id="c-fr-0009]
    9. Evacuation mast (1) according to any one of the preceding claims, in which the mast head (3) comprises a grid (18) located at the opening (10) of the upper part of the head. mast (3) so as to filter the water flow going towards the opening (10).
    [10" id="c-fr-0010]
    10. Evacuation mast (1) according to any one of the preceding claims, in which the mast head (3) has an opening parameter „51 lower P defined by the following equation: r = -, with S1 representing the total area of the at least one perforation (17) of the peripheral connecting plate (16) and S2 representing the total area of the opening (10) of the upper part of the mast head (3); the lower opening parameter P making it possible to quantify the size of the lower opening relative to the opening (10) of the upper part of the mast head (3), this parameter P being less than or equal to 0.01 .
    5
    [11" id="c-fr-0011]
    11. Evacuation mast (1) according to any one of the preceding claims, in which the mast head (3) comprises three peripheral connecting plates (16) distributed all around the mast head (3), the plates (16) each being provided with at least one perforation (17) and each being fixed to each other so that the side wall of the lower portion of the mast head (3) and the plates connecting (16) form a gutter (11) surrounding the upper end portion of the mast body (2).
    [12" id="c-fr-0012]
    12. Ship (70) for transporting a cold liquid product, the ship comprising a double hull (72), a tank (71) disposed in the double hull and at least one gas evacuation mast (1) according to any one of the preceding claims 15, connected to the tank, the at least one mast being located on an upper deck (81) of the ship and making it possible to evacuate gas to the atmosphere in the event of overpressure in the tank.
    1/5
    FIG. 2
    2/5
    Section A-A
    FIG. 3
    3/5
    FIG. 4
    4/5
    FIG. 5
    6 6
    FIG. 6 FIG. 7
    5/5
    FIG. 9
    FIG. 10
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    同族专利:
    公开号 | 公开日
    WO2019097131A1|2019-05-23|
    SG11202004340XA|2020-06-29|
    KR20200078622A|2020-07-01|
    EP3710349B1|2021-03-17|
    ES2869257T3|2021-10-25|
    RU2758731C1|2021-11-01|
    CN111448131B|2022-02-18|
    CN111448131A|2020-07-24|
    EP3710349A1|2020-09-23|
    FR3073491B1|2019-11-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    KR20140079900A|2012-12-20|2014-06-30|현대중공업 주식회사|Gas vent device with blowing system|
    KR20150047320A|2013-10-24|2015-05-04|삼성중공업 주식회사|Unified vent mast structure|
    EP3138767A1|2014-04-30|2017-03-08|Daewoo Shipbuilding & Marine Engineering Co., Ltd.|Fuel gas supply system of vessel|
    KR20160052116A|2014-11-04|2016-05-12|대우조선해양 주식회사|Container Ship And Arrangement Method Of The Same|
    CN203410595U|2013-06-25|2014-01-29|上海佳豪船舶工程设计股份有限公司|Combined venting mast for hazardous gas emission of small-sized ship|
    CN203921126U|2014-03-20|2014-11-05|中国舰船研究设计中心|A kind of large-scale elongated truss column is in conjunction with mast|
    CN104960633A|2015-06-15|2015-10-07|中远船务工程集团有限公司|Tank type LNG container transporting ship|
    CN205618984U|2016-04-06|2016-10-05|南通中集能源装备有限公司|A ventilative mast for liquefied natural gas system|US11105544B2|2016-11-07|2021-08-31|Trane International Inc.|Variable orifice for a chiller|
    FR3109896A1|2020-05-05|2021-11-12|Gaztransport Et Technigaz|System and method for treating gases blown from a gas evacuation mast|
    JP2021185056A|2020-05-25|2021-12-09|川崎重工業株式会社|Vent mast|
    法律状态:
    2018-11-29| PLFP| Fee payment|Year of fee payment: 2 |
    2019-05-17| PLSC| Publication of the preliminary search report|Effective date: 20190517 |
    2019-11-29| PLFP| Fee payment|Year of fee payment: 3 |
    2020-11-30| PLFP| Fee payment|Year of fee payment: 4 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1760816A|FR3073491B1|2017-11-16|2017-11-16|GAS EXHAUST MATERIAL|
    FR1760816|2017-11-16|FR1760816A| FR3073491B1|2017-11-16|2017-11-16|GAS EXHAUST MATERIAL|
    EP18801019.3A| EP3710349B1|2017-11-16|2018-10-22|Gas discharge mast|
    RU2020114933A| RU2758731C1|2017-11-16|2018-10-22|Gas exhaust mast|
    KR1020207015946A| KR20200078622A|2017-11-16|2018-10-22|Gas exhaust mast|
    CN201880073026.5A| CN111448131B|2017-11-16|2018-10-22|Exhaust mast|
    ES18801019T| ES2869257T3|2017-11-16|2018-10-22|Gas evacuation mast|
    PCT/FR2018/052616| WO2019097131A1|2017-11-16|2018-10-22|Gas discharge mast|
    SG11202004340XA| SG11202004340XA|2017-11-16|2018-10-22|Gas discharge mast|
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