JP2016069064A - Liquefied hydrogen transfer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquefied hydrogen transfer system which prevents rain water from being attached to a coupling upon connection and separation of the coupling of the liquefied hydrogen transfer system.SOLUTION: A liquefied hydrogen transfer system can transfer low-temperature fluid by connecting a land-side coupling 5 on a tip part of a loading arm for liquefied hydrogen to a ship-side coupling 7 of a manifold of a liquefied hydrogen transport ship side. Therein, when the land side coupling 5 and the ship side coupling 7 are connected, a cover mechanism 10 for covering at least an upper side neighborhood of both couplings 5, 7 such that a cover mechanism 10 prevents both couplings 5, 7 from being exposed to rain water is provided, and the cover mechanism 10 has a first roof member 13 which is fixed to a loading arm side pipe line 11 of a lateral attitude and is arranged on an upper side neighborhood of both couplings 5, 7 and a second roof member 15 which is fixed to a manifold side pipeline 12 of a lateral attitude and is arranged on an upper side neighborhood of both couplings 5, 7 on the lower side of the first roof member 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a liquefied hydrogen transfer system, and is provided with a cover mechanism for covering both joints so that rainwater is not applied when connecting a land side joint at the tip of a loading arm to a ship side joint of a manifold on a liquefied hydrogen transport ship side. About.

  When loading and unloading fossil fuels between transport vessels that transport fossil fuels such as crude oil, gasoline, light oil, natural gas (LNG, LPG) and storage tanks on land, a loading arm is usually used. Used. A general loading arm has a support structure as an outer riser standing on land, an inboard boom pivotally supported on the top of the outer riser, and an upper end pivoting on the upper end of the inboard boom. A freely connected outboard boom, a counterweight equipped on the lower end side of the inboard boom, and the like are provided.

  As a fossil fuel transport pipe in the loading arm, an inner riser disposed in the outer riser, an inboard arm connected to the inner riser via a swivel joint and disposed in the inboard boom, an upper end of the inboard arm An outboard arm whose upper end is connected to the part via a swivel joint and supported by an outboard boom, an ERS (emergency separation system) connected to the lower end of the outboard arm via a swivel joint, It has a joint connected via a swivel joint. The fossil fuel is loaded or unloaded in a state where the land side joint is connected to the ship side joint.

Patent Document 1 discloses a liquefied gas transfer system that unloads liquefied gas from a liquefied gas transport ship to a land-based liquefied gas storage tank via a loading arm.
In a liquefied hydrogen transfer system that loads and unloads liquefied hydrogen via a loading arm between a liquefied hydrogen tank on land and a liquefied hydrogen tank on the ship side, a vacuum insulated double pipe is generally adopted as a highly insulated piping system. As the joint, for example, a joint dedicated to a vacuum heat insulating double pipe such as a bayonet joint is employed.

Utility Model Registration No. 2561667

Between the male and female joints of the bayonet joint, there is a small clearance for inserting the male joint. When connecting the bayonet joint, before inserting the male joint into the female joint, it is generally necessary to degrease and clean the surface of the male joint to remove moisture and oil.
If the bayonet joint is connected in the rain when raindrops are attached to the male and female joints of the bayonet joint, the seal may be damaged due to freezing or expansion of the raindrop, causing hydrogen gas leakage, or There are problems such as damage to the joint.

  An object of the present invention is to provide a liquefied hydrogen transfer system that prevents rainwater from adhering to the joint when connecting or separating the joint of the liquefied hydrogen transport system.

  The liquefied hydrogen transfer system according to claim 1 is a liquefied hydrogen transfer system capable of transferring a cryogenic fluid by connecting a land side joint at a tip portion of a loading arm for liquefied hydrogen to a ship side joint of a manifold on a liquefied hydrogen transport ship side. A cover mechanism that covers at least the vicinity of the upper side of both the joints when connecting the side joint and the ship side joint, is provided with a cover mechanism that prevents rainwater from being applied to both the joints.

  According to a second aspect of the present invention, there is provided a liquid hydrogen transfer system according to the first aspect, wherein the cover mechanism is fixed to a loading arm side pipe in a lateral orientation and is disposed in the vicinity of the upper side of both joints, And a second roof member that is fixed to the manifold-side pipe in a posture and disposed near the upper side of both joints on the lower side of the first roof member.

  According to a third aspect of the present invention, there is provided the liquid hydrogen transfer system according to the second aspect of the invention, wherein the cover mechanism is a pair of flexible first members suspended from both end edges of the first roof member to a level lower than both joints. It is characterized by comprising a sheet member and a pair of flexible second sheet members suspended from both end edges of the second roof member to a level lower than both joints.

  A liquefied hydrogen transfer system according to a fourth aspect is characterized in that, in the invention according to the first aspect, the cover mechanism includes a circular roof member fixed to a loading arm side pipe in a standing posture.

  The liquefied hydrogen transfer system according to a fifth aspect is the invention according to the fourth aspect, wherein the cover mechanism includes a flexible cylindrical sheet member that is suspended from the outer peripheral edge of the circular roof member to a level lower than both joints. It is characterized by that.

  According to the first aspect of the present invention, in the liquefied hydrogen transfer system, when connecting the land side joint and the ship side joint at the tip of the liquefied hydrogen loading arm, the cover mechanism covers at least the vicinity of the upper side of both joints. The cover mechanism that prevents rainwater from being applied to both joints prevents rain on both joints when connecting the land-side joint and ship-side joint in rainy weather, thus improving workability when connecting both joints. Can do.

  According to the second aspect of the present invention, the cover mechanism is fixed to the loading arm side piping in the lateral orientation and fixed to the manifold side piping in the lateral orientation and the first roof member disposed near the upper side of both joints. In addition, since the second roof member disposed near the upper side of both joints on the lower side of the first roof member, the workability in connecting the land side joint and the ship side joint is the same as in the invention of claim 1. In addition, even when the joints are separated, the land side joint is covered with the first roof member and the ship side joint is covered with the second roof member.

  According to the invention of claim 3, in the invention of claim 2, the pair of flexible first sheets in which the cover mechanism is suspended from both end edges of the first roof member to a level lower than both joints. Member and a pair of flexible second sheet members suspended from both end edges of the second roof member to a level lower than both joints. The side surfaces on both sides of the joint can be covered, and the side surfaces on both sides of both joints can be covered by the pair of second sheet members, so that the cover performance for covering both joints so that rainwater is not applied can be further enhanced. it can. And since the 1st, 2nd sheet | seat member is a flexible thing, the workability | operativity at the time of connecting both joints and connecting / separating does not fall.

  According to the fourth aspect of the present invention, since the cover mechanism includes the circular roof member fixed to the loading arm side pipe in the upright posture, when the land side joint and the ship side joint are connected in the rain, Since it does not take, workability | operativity at the time of connecting both joints can be improved.

  According to the invention of claim 5, in the invention of claim 4, the cover mechanism comprises a flexible cylindrical sheet member that is suspended from the outer peripheral edge of the circular roof member to a level lower than both joints. Therefore, it is possible to further improve the cover performance to cover both joints so that rainwater is not applied. Moreover, since the cylindrical sheet member is flexible, workability when connecting or separating both joints is not reduced.

It is explanatory drawing of the liquefied hydrogen transport ship which concerns on Example 1 of this invention, and the loading arm for liquefied hydrogen. It is a side view of the bayonet coupling and cover mechanism of a liquefied hydrogen transfer system. It is a bottom view of the bayonet coupling and cover mechanism of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 3 is a diagram corresponding to FIG. FIG. 6 is a diagram corresponding to FIG. 4 of the second embodiment. It is a partial vertical side view of the bayonet joint and cover mechanism of Example 3. It is the VIII-VIII sectional view taken on the line of FIG. It is a partial vertical side view of the bayonet joint of Example 4 and a cover mechanism. FIG. 10 is a bottom view of the bayonet joint and cover mechanism of FIG. 9. FIG. 10 is a diagram corresponding to FIG. 9 of Example 5.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, this liquefied hydrogen transfer system 1 unloads liquefied hydrogen from a liquefied hydrogen tank 3 of a liquefied hydrogen carrier ship 2 to an onshore liquefied hydrogen tank (not shown) or from the liquefied hydrogen tank on the ship side. This is a liquefied hydrogen transfer system for loading liquefied hydrogen into the liquefied hydrogen tank 3, and a liquefied hydrogen loading arm 4 is provided on the land side. Most of the liquefied hydrogen transfer system 1 is constituted by a vacuum heat insulating double tube.

  When liquefied hydrogen is loaded or unloaded through the loading arm 4, the land-side joint 5 at the tip of the loading arm 4 is connected to the ship-side joint 7 of the manifold 6 of the liquefied hydrogen pipe of the liquefied hydrogen carrier 2 and then liquefied. Transfer hydrogen. In this embodiment, the land side joint 5 is a male joint of a bayonet joint, and the ship side joint 7 is a female joint of a bayonet joint. However, joints other than bayonet joints can be used.

  When the land side joint 5 at the tip of the loading arm 4 is connected to the ship side joint 7 of the manifold 6, the loading arm 4 may be damaged if the weather worsens and the liquefied hydrogen carrier 2 is shaken vigorously. The liquid hydrogen loading arm 4 is equipped with an emergency detachment system 8 (ERS).

  As shown in FIGS. 2 to 4, when connecting the land side joint 5 and the ship side joint 7, the cover mechanism 10 covers at least the vicinity of the upper side of both the joints 5, 7. A cover mechanism 10 is provided to prevent rainwater.

  The cover mechanism 10 includes a flat plate-shaped first roof member 13 fixed to a loading arm side pipe 11 (land side pipe) in a lateral orientation and disposed in the vicinity of the upper sides of the joints 5 and 7, and a manifold in a lateral orientation. A flat plate-like second roof member 14 is provided which is fixed to the side pipe 12 (ship side pipe) and disposed below the first roof member 13 in the vicinity of the upper side of the joints 5 and 7. In addition, the land side joint 5 and the ship side joint 7 which are shown in FIGS.

  The first roof member 13 is formed integrally with a substantially triangular first connecting plate 14. The first connecting plate 14 is disposed perpendicular to the axis of the pipe, the base end is joined to the land side pipe 11, and extends upward from the land side pipe 11. The first roof member 13 and the first connecting plate 14 are made of thin steel plates or stainless steel plates. The first roof member 13 is formed in a rectangular shape in plan view (long in the longitudinal direction of the pipe) that is large enough to cover the vicinity of the upper side of the land side joint 5 and the ship side joint 7 and the periphery thereof, in order to promote drainage of rainwater. The lower slope of the first roof member 13 is integrated with the upper end of the first connecting plate 14 in a downward slope toward the direction away from the land-side joint 5.

  The second roof member 14 is formed integrally with the substantially triangular second connecting plate 15. The second connecting plate 15 is disposed orthogonal to the axis of the pipe, the base end is joined to the ship side pipe 12, and extends upward from the ship side pipe 12. The second roof member 14 and the second connecting plate 15 are made of thin steel plates or stainless steel plates. The second roof member 14 is disposed in the vicinity of the lower side of the first roof member 13, and the second roof member 14 is large enough to cover the upper vicinity of the land-side joint 5 and the ship-side joint 7 and the periphery thereof. It is formed in a rectangular shape in plan view (long in the longitudinal direction of the pipe) and has a downward slope toward the direction away from the ship side joint 7 in order to promote drainage of rainwater, and the lower end of the second roof member 15 is second. It is integrated with the upper end portion of the connecting plate 15.

  Since the cover mechanism 10 as described above is provided, when connecting the land-side joint 5 and the ship-side joint 7 in the rain, the joints 5 and 7 are not exposed to rain. Can be increased. Moreover, since the first roof member 13 is fixedly provided on the land side pipe 11 and the second roof member 14 is fixedly provided on the ship side pipe 12, the land side joint 5 and the ship side joint 7 are separated before the bayonet joint is connected. Even in this state, the joints 5 and 7 do not rain. Since the side of the bayonet joint is open, workability when connecting the land-side joint 5 and the ship-side joint 7 is not reduced.

  A cover mechanism 10A of the liquefied hydrogen transfer system according to the second embodiment will be described with reference to FIGS. Since this cover mechanism 10A is mostly the same as the cover mechanism 10 of the first embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described. The cover mechanism 10 </ b> A includes a pair of flexible first sheet members 17 that are suspended from both ends of the first roof member 13 to a level lower than the joints 5 and 7, and both ends of the second roof member 15. A pair of flexible second sheet members 18 suspended from the joints 5 and 7 to a lower level.

  The first and second sheet members 17 and 18 are made of a transparent sheet material made of, for example, a synthetic resin. When the weather is not rainy, the pair of first sheet members 17 and the pair of second sheet members 18 are the first. The roof member 13 and / or the second roof member 15 can be folded back. In case of rain, work with the first and second sheet members 17 and 18 on the side where the bayonet joints are connected and disconnected are folded over the first roof member 13 and / or the second roof member 15 Can also be done.

An air curtain may be provided instead of the first and second sheet members 17 and 18. In this case, air curtain air blowing portions are disposed at both end edges of the first roof member 13, and air curtain air blowing portions are disposed at both end edges of the second roof member 15. Desirably, the dry air sent to the air curtain is air dried by the cold heat of liquefied hydrogen.
Since both sides of the bayonet joint are covered with double air curtains, rain water can be reliably prevented from entering. Pressurized air for the air curtain instead of the first seat member 17 is supplied from the air piping along the loading arm 4, and pressurized air for the air curtain instead of the second seat member 18 is supplied from the air piping on the ship side. It shall be.

  A cover mechanism 10B of the liquefied hydrogen transfer system of Example 3 will be described with reference to FIGS. Since most of the cover mechanism 10B is the same as the cover mechanism 10 of the first embodiment, the same reference numerals are given to the same components and the description thereof will be omitted, and different configurations will be mainly described. In this cover mechanism 10B, the first roof member 13B is a part of a partial conical surface, and is, for example, a thin steel plate or a stainless steel plate forming a part of a partial conical surface having an opening angle of about 140 ° shown in FIG. It is configured. The upper end of the first connecting plate 14B is formed in an arc shape according to the shape of the first roof member 13B, and the lower end of the first roof member 13B is joined to the upper end of the first connecting plate 14B.

Further, the second roof member 15B is a part of a partial conical surface, for example, a thin steel plate or a stainless steel plate forming a part of the partial conical surface having an opening angle of about 140 ° shown in FIG.
The upper end of the second connecting plate 16B is formed in an arc shape according to the shape of the second roof member 15B, and the lower end of the second roof member 15B is joined to the upper end of the second connecting plate 16B. The width of the first and second roof members 13B and 15B (the width in the horizontal direction perpendicular to the axis of the pipe) is about twice the diameter of the land side joint 5 and the ship side joint 7 and is sufficiently wide. Because it is formed, it has excellent cover performance in rainy weather.

  In addition, the same operation and effect as the cover mechanism 10 of the first embodiment are obtained. As in the second embodiment, a pair of first and second sheet members may be provided, or an air curtain replacing the pair of first and second sheet members may be provided.

  A cover mechanism 10C of the liquefied hydrogen transfer system of Example 4 will be described with reference to FIGS. When connecting the land side joint 5C and the ship side joint 7C, the cover mechanism 10C covers at least the vicinity of the upper side of both the joints 5C, 7C, and the cover mechanism 10C prevents the rainwater from being applied to the joints 5C, 7C. Is provided.

  This cover mechanism 10C is provided with a circular roof member 20 fixed to a portion near the upper side of the land side joint 5C and the ship side joint 7C in the loading arm side pipe 11C (land side pipe) in the standing posture. The circular roof member 20 is manufactured by press-molding a thin steel plate or a stainless steel plate, and has a short inner cylindrical portion 20a fixed to the land-side pipe 11C in an outer fitting shape, and a lower end of the inner cylindrical portion 20a. Are provided with an annular flat plate portion 20b integrally formed and a short outer peripheral wall portion 20c rising from the vicinity of the outer periphery of the annular flat plate portion 20b. The annular flat plate portion 20b is provided with a drain cock 21 for discharging rainwater collected on the upper surface side of the circular roof member 20.

  Since the cover mechanism 10C as described above is provided, when connecting the land-side joint 5C and the ship-side joint 7C in the rain, the joints 5C and 7C are not rained. Therefore, workability when connecting the joints 5C and 7C. Can be increased. Note that the cover mechanism 10C may be configured in a split structure that is divided into two semi-annular rings, and may be configured to be integrally fixed with screws, bolts, or the like.

A cover mechanism 10D of the liquefied hydrogen transfer system according to the fifth embodiment will be described with reference to FIG. Since most of the cover mechanism 10D is the same as the cover mechanism 10C of the fourth embodiment, the same components are denoted by the same reference numerals, description thereof is omitted, and different configurations are mainly described.
In addition to the circular roof member 20 and the drain cock 21, the cover mechanism 10 </ b> D includes a flexible cylindrical sheet member 22 that is suspended from the outer peripheral edge of the circular roof member 20 to a level lower than the joints 5 </ b> C and 7 </ b> C. Yes. The cylindrical sheet member 22 is made of a transparent sheet material made of synthetic resin, for example. The drain pipe of the drain cock 21 is extended below both joints 5C and 7C,
It is desirable that the water is drained at a position below both the joints 5C and 7C.

  Since the cylindrical sheet member 22 is provided, the cover performance against rainwater can be further enhanced. Since the cylindrical sheet member 22 is made of a flexible transparent sheet material, workability when connecting or separating the land side joint 5C and the ship side joint 7C can be ensured. However, if necessary, the cylindrical sheet member 22 may be divided into two or three parts in the circumferential direction. A cylindrical air curtain may be provided instead of the cylindrical sheet member 22.

An example in which the embodiment is partially changed will be described.
1) Although the bayonet joint is employed in the above-described embodiment, a joint other than the bayonet joint may be employed.
2) Although the case where most of the liquefied hydrogen transfer system is constituted by a vacuum insulated double pipe has been described as an example, most of the liquefied hydrogen transfer system is constituted by a highly insulated single pipe other than the vacuum insulated double pipe. It is also possible.
3) In addition, it is needless to say that those skilled in the art can implement the invention by adding partial changes to the above-described embodiment.

  The present invention provides a liquefied hydrogen transfer system that prevents rainwater from adhering to the joint during connection or separation of the joint of the liquefied hydrogen transfer system.

DESCRIPTION OF SYMBOLS 1 Liquefied hydrogen transfer system 2 Liquefied hydrogen transport ship 4 Loading arm 5 Land side joint 7 Ship side joint 10-10D Cover mechanism 13,15 1st, 2nd roof member 17,18 1st, 2nd sheet member 20 Circular roof member 22 Cylindrical sheet member

Claims (5)

In the liquefied hydrogen transfer system capable of transferring a cryogenic fluid by connecting the land side joint at the tip of the loading arm for liquefied hydrogen to the ship side joint of the manifold on the liquefied hydrogen transport ship side,
A liquefied hydrogen transfer comprising a cover mechanism that covers at least the vicinity of the upper side of both joints when connecting the land side joint and the ship side joint, and prevents the rainwater from being applied to both the joints. system.   A first roof member fixed to a loading arm side pipe in a lateral orientation and disposed near the upper side of both joints; and a lower side of the first roof member fixed to a manifold side pipe in a lateral orientation. The liquefied hydrogen transfer system according to claim 1, further comprising a second roof member disposed in the vicinity of the upper side of both joints.   The cover mechanism is lower than both joints from a pair of flexible first sheet members suspended from both ends of the first roof member to a level lower than both joints, and from both ends of the second roof member. The liquefied hydrogen transfer system according to claim 2, further comprising: a pair of flexible second sheet members suspended to a level.   The liquefied hydrogen transfer system according to claim 1, wherein the cover mechanism includes a circular roof member fixed to a loading arm side pipe in an upright posture.   The liquefied hydrogen transfer system according to claim 4, wherein the cover mechanism includes a flexible cylindrical sheet member that is suspended from an outer peripheral edge of the circular roof member to a level lower than both joints.