JP5208459B2 - Bulk cargo handling equipment generating flammable gas and bulk cargo handling method generating flammable gas - Google Patents

Description

  The present invention generates a combustible gas that can be transported and handled as a solid bulk cargo, which generates a combustible gas such as gas hydrate, between a land-side transport base and a ship. The present invention relates to a bulk cargo handling device and a bulk cargo handling method that generates flammable gas.

  In recent years, it has been considered to hydrate natural gas and transport this solid natural gas hydrate (NGH). As this transportation method, since this natural gas hydrate generates a flammable gas, many solid-liquid mixed transportations such as slurry transportation in a pipe that is easy to keep airtight have been proposed.

  However, in the case of solid-liquid mixed transport, it is necessary to transport a liquid for transportation that cannot actually be used compared to transport of natural gas hydrate in a dry state. When moving from the storage stage to the transport, it is necessary to mix the transport liquid, and it is necessary to perform solid-liquid separation that separates and removes the transport liquid at the end of transport, the storage stage, and the use stage. In addition, it is necessary to process the transport liquid separated by the solid-liquid separation.

  For this reason, it is preferable to transport and store natural gas hydrate in a granular form such as dry pellets instead of solid-liquid mixed transport. When this natural gas hydrate is unloaded as bulk cargo and transported by bulk cargo ship, combustible gas is generated. It is necessary to prevent the inflow, and a dedicated gas hydrate handling device for handling cargo between the land transportation base and the bulk carrier is required.

  Regarding such a cargo handling device, as a device for lifting and handling methane gas hydrate in a dry state, methane gas hydrate pellets are sucked by exhausting methane gas from a flexible suction pipe with an exhaust pump, and before the exhaust port. When the methane gas hydrate pellets accelerated by the nozzle section pass through the openable / closable diaphragm, high-pressure methane gas is ejected from the methane gas ejection nozzle for transportation and transported in the pipe, so that liquid refrigerants such as antifreeze and low-temperature liquefied gas are obtained. There has been proposed a methane gas hydrate pellet unloading device that unloads and transports the material in a dry state from a transport ship or a storage tank (see, for example, Patent Document 1).

  However, this device sucks and conveys methane gas hydrate by the flow of methane gas, and because it is a solid-gas mixed transport in the pipe, it is suitable for transporting very short distances such as cargo collection in the hold, For transport over a relatively long distance, the amount of methane gas to be used and the power for generating an air current increase, which is not suitable.

  In addition, many unloader devices have been proposed as cargo handling devices for unloading bulk cargo such as coal from a transport ship. For example, a rotating table is provided on a traveling body, and the conveyor rotates with the rotating table. The section is configured by winding an endless bucket conveyor around a vertical section and a horizontal section connected orthogonally, and the lower end of the vertical section of this bucket conveyor is used as a scraping section and one end of the horizontal section is a discharge section. A continuous unloader has been proposed (see, for example, Patent Document 2).

  However, in these cargo handling devices, there is no particular explanation regarding the airtight maintenance with the outside, which is necessary for cargo that generates combustible gas such as gas hydrate. Such airtight maintenance with the outside is necessary in the entire area of the transportation section between the land-side transport base and the ship, but in particular, the connection between the cargo handling equipment and the land-side transport base, and the turning of the cargo handling equipment. It becomes difficult to maintain airtightness in the expansion / contraction part of the cargo handling device.

  In the current cargo handling equipment for bulk cargo, although measures against dust are taken, there is no need to consider the generation of flammable gas, so it is not considered for airtightness and cannot be used as it is. In addition, the current cargo handling apparatus for bulk cargo is not necessarily configured to be airtight.

  On the other hand, the offshore offloading device includes a vertical conveyor that receives solids from the first offshore floating body side, a horizontal conveyor that receives the solids raised by the vertical conveyor at the receiving portion and transfers them to the tip, and The shooter is arranged in the vicinity of the front end portion and leads to the second offshore floating body while dropping solids, and the shooter has elasticity to absorb relative displacement between the first offshore floating body and the second offshore floating body. A solid material such as natural gas hydrate pellets, which are formed in a bellows structure, is transferred between multiple offshore floating bodies such as offshore production facilities and transport ships while absorbing relative displacement between offshore floating bodies caused by sea conditions. Has also been proposed (see, for example, Patent Document 3).

However, in this offshore offloading apparatus, the airtight holding structure is not mentioned, and a structure for airtight holding that is easy to apply with a simple structure is required.
JP 2004-131272 A JP 11-49374 A JP 2006-15910 A

  The present invention has been made in order to solve the above-described problems. The purpose of the present invention is to deliver cargo generating combustible gas such as pellet-like gas hydrate between a land-side transport base and a ship. To provide a bulk cargo handling device that generates flammable gas that can be handled while maintaining an airtight state with outside air in a transport section, and a bulk cargo handling method that generates flammable gas. It is in.

In order to achieve the above object, the bulk cargo handling apparatus for generating combustible gas according to the present invention handles bulk cargo generating combustible gas between a land-side transport base and a ship. A cargo handling apparatus having a support carriage, an upper transport unit, a lower transport unit, a vertical transport unit that connects the upper transport unit and the lower transport unit, and a vertical telescopic transport unit that descends from the lower transport unit. The upper transport unit, the lower transport unit, the vertical transport unit, and the vertical telescopic transport unit are mounted on the support carriage moving along the quay on land, and the upper transport unit is The connection part on one end side disposed on the land side is detachably and turnable from the attachment part of the transportation base, and the upper transportation part, the vertical transportation part, the lower transportation part, and the vertical expansion and contraction Turn the transport section around the mounting section of the transport base Is configured to be swingable, and is connected to the vertical transport unit at the other end disposed on the sea side, and the lower transport unit is connected to the vertical transport unit at one end disposed on the land side. Connected to the vertical telescopic transport unit at the other end disposed on the sea side, and the vertical transport unit is configured so that the lower transport unit and the upper transport unit can pivot with respect to the upper transport unit. A vertical lower part that is pivotably connected to the upper part, and the vertical telescopic conveying part is configured to be extendable and retractable in response to a vertical displacement of a lower end part. A partition portion is inserted into the liquid reservoir, and the liquid reservoir And dividing the chamber into an inner peripheral side chamber and an outer peripheral side chamber, and the inner peripheral side chamber The lower part of the outer peripheral side chamber is configured to communicate with each other so that a liquid flows, and an air-tight structure that makes the upper part of the inner peripheral side chamber and the upper part of the outer peripheral side chamber airtight by the liquid put in the liquid reservoir. In addition, at the connection portion between the attachment portion and the connection portion, the bulk cargo is transferred to the upper transport portion that transports the bulk cargo in a horizontal direction from the top to the bottom by transport by natural fall or transport in the vertical direction. Configured to transport.
Further, in the bulk cargo handling device that generates the above-described combustible gas, an arc-shaped rail centering on the axis of the attachment portion and the connection portion is laid on the upper surface of the support carriage, and the rail is placed on the rail. The upper conveying unit is configured to turn or swing by traveling.

  According to this configuration, by using this airtight structure, the airtightness can be maintained by using the liquid U-shaped tube effect. And since it is liquid-sealed, the airtightness can be maintained easily and easily with a relatively simple structure, so that the airtightness is steady in the connected state not only with a small opening but also with a large opening. Can be secured. In addition, since the liquid seal portion can be accommodated only at the outer peripheral portion, the structure can be simplified. The liquid seal does not mean that the liquid is contained, but means that the gas is sealed with the liquid, in other words, the airtightness is maintained by the liquid accumulated in the liquid reservoir.

  In addition, the resistance for airtightness in vertical movement and turning during disconnection and connection and expansion / contraction of the expansion / contraction part is also resistance due to the viscosity of the liquid, so it can be made very small when the vertical movement speed and the rotation speed are slow. it can.

  In addition, since the liquid is used, it is preferable that the turning direction is the horizontal direction. However, by turning the shape of the liquid pool part and the shape of the partitioning part, the turning direction is also preferable when turning in a direction inclined to some extent from the horizontal direction. Can be applied. In addition, the moving direction for disconnection, connection and expansion / contraction is preferably the vertical direction (up and down direction), but by devising the shape of the liquid reservoir and the shape of the partition part, the direction of inclination is somewhat inclined from the vertical direction. On the other hand, it can also be applied to the case where it expands and contracts.

  And as a liquid for liquid sealing put into a liquid reservoir part, antifreeze liquid, seawater, water, etc. can be considered. In addition, if seawater or water is used, it can be used easily, and even if liquid for liquid sealing leaks out, contamination of the sea area and water area can be avoided, and liquid sealing liquid is secured. Therefore, the problem of environmental pollution and the problem of storage of liquid for sealing can be avoided.

  Normally, the amount of change in the volume of the liquid reservoir due to the amount of insertion of the partition into the liquid reservoir due to the amount of expansion / contraction of the expansion / contraction part and the decrease due to evaporation or leakage of the liquid for liquid sealing are automatically calculated. In order to compensate, a liquid replenishing tank is connected to the liquid reservoir by a pipe from the outside, and the liquid is replenished while monitoring the liquid level. As a result, the amount of liquid in the liquid reservoir is always kept appropriate, and an abnormal internal pressure is detected by detecting an abnormal rise or fall in the liquid level.

  When the pressure difference between the internal pressure and the external pressure (atmospheric pressure) is large, it is preferable to use a liquid with a large specific gravity. When the pressure fluctuation of the internal pressure is large, a liquid with a large viscosity is used to change the liquid level. Is preferably reduced. In addition, it is not desirable that the liquid used for liquid sealing evaporates or burns in the event of a fire. For example, liquids may be provided in multiple layers.

  Further, in the structure of the connecting portion, when the liquid sealing liquid put in the liquid reservoir is circulated, the liquid sealing liquid freezes even in the case of low-temperature cargo such as natural gas hydrate. Can be prevented. In this circulation, a new liquid may be supplied and circulated by a circulation pipe and a circulation pump, or may be recirculated between the liquid reservoir and the heat exchange part that is outside the liquid reservoir. . In this recirculation, the circulation pipe may also serve as the heat exchange unit.

  Furthermore, in this configuration, a support carriage is provided, and the connection part of the upper transport part is formed so as to be detachable from the attachment part of the transport base. can do. In addition, although the positional relationship between the connection part of this upper conveyance part and the attachment part of a conveyance base normally makes an attachment part an upper part and a connection part under it, it is not limited to this positional relationship.

  In addition, since the upper transport unit in which the first transport device is disposed and the lower transport unit in which the second transport device is disposed are configured to be turnable, the cargo can be handled equally in the horizontal direction in the hold. It becomes easy. In addition, since the range in which the cargo can be handled with respect to the land-side transport base is widened, the movement of the support cart is reduced, and the cargo handling efficiency can be increased. Moreover, since it is set as the structure which turns below the vertical conveyance part arrange | positioned on the sea side, the weight of a turning part can be reduced and the structure of a turning part can be simplified. In particular, when the vertical transporting portion that can be turned is provided at a portion protruding to the sea, the range of the cargo hold that can be handled more can be expanded for the length of the lower transporting portion. This turning direction is usually turning in a horizontal plane, but a slight inclination, for example, about 10 ° is allowed.

  Furthermore, since the vertical telescopic conveyance unit is provided at the part connected to the hold, it is possible to easily cope with a change in the distance between the hold and the lower transfer unit due to a change in the water level or a change in the draft of the ship. Moreover, since it provided in the site | part nearest to the hold, the vertical expansion-contraction conveyance part should just support its own weight, and can further simplify an expansion-contraction mechanism. In particular, as with unloader equipment for bulk cargo such as coal, do not insert the scraping part into the hold with the entire transport part tilted in the vertical face or pull it out from the hold. As a result, an inclination mechanism is not required, and airtightness is easily maintained. The vertical telescopic transport unit extends and contracts in the vertical direction, but does not have to be strictly in the vertical direction, and for example, an inclination of about 10 ° is allowed.

  With these configurations, it is possible to ensure the airtightness of the connecting portion, the turning portion, and the vertical expansion / contraction portion of the bulk cargo handling device that generates combustible gas, and it is possible to easily disconnect, connect, turn, and extend / contract. Therefore, in the connected state, even if flammable gas or the like is generated, it does not leak to the outside of the bulk cargo handling device that generates flammable gas, and conversely, the outside air generates flammable gas. There is no entry into the bulk cargo handling equipment. Therefore, when a bulk cargo that generates flammable gas such as natural gas hydrate is transported with this bulk cargo handling device that generates flammable gas, it can be safely transported while being shut off from the outside air. it can.

  In the above bulk cargo handling apparatus that generates flammable gas, the conveyance in the upper conveyance unit and the lower conveyance unit is performed by the conveyance of the belt conveyor that conveys in the horizontal direction, and the conveyance in the vertical conveyance unit and the vertical telescopic conveyance unit If it is configured so that it can be transported by natural fall or transported by a belt conveyor that transports the material in the vertical direction, a transport device used for transporting bulk cargo that generates flammable gas such as dry gas hydrate can be simplified. It can be composed of a combination of devices.

In cargo apparatus of bulk cargo for generating the flammable gas, turning said upper conveying portion and the vertical transfer portion and the lower transport section and the vertical extendable conveyance unit, the mounting part around the transporting base Alternatively, when configured to be swingable, the cargo handling range with respect to the transportation base can be remarkably widened, so that the number of transportation bases can be reduced and the cargo handling efficiency can be improved by reducing the number of connections.

  The above-described bulk cargo handling device that generates combustible gas is an optimal cargo handling device for handling gas hydrate as bulk cargo that generates combustible gas. However, the present invention is not limited to gas hydrate, and can be applied to bulk cargoes that generate other combustible gases.

In order to achieve the above object, the bulk cargo handling method for generating flammable gas according to the present invention includes an upper transport section connectable to a land-side transport base, and a vertical transport section connected to the upper transport section. For transportation on the land side in a bulk cargo handling equipment that generates flammable gas, which is mounted on a support carriage with a lower conveyance section that is pivotably connected and a vertical telescopic conveyance section that descends from the lower conveyance section. A method for unloading bulk cargo that generates flammable gas between a base and a ship , wherein the upper part is attached to a mounting portion of the transport base on the land side nearest to a cargo cargo to be handled by the ship. Connected at the connection part on one end side of the transport part, and then, bulk cargo generating flammable gas from the transport base, the upper transport part, the vertical transport part, the lower transport part, the vertical telescopic transport The vertical telescopic transport via the section Conveys the handling object hold arranged at the lower end of the hermetic structure between said connecting portion and the attachment portion, pivotally the lower transport connecting to pivot the upper and orbiting above the upper transport unit The partition part is inserted into the liquid reservoir part, and the liquid reservoir part is connected to the inner peripheral side chamber and the outer peripheral side chamber. And the upper part of the inner peripheral side chamber and the upper part of the outer peripheral side chamber are configured to communicate with each other so that liquid flows through the inner peripheral side chamber and the lower part of the outer peripheral side chamber. An airtight structure that seals the space between the mounting portion of the transport base and the connection portion of the upper transport portion so that the connection is detachable and turnable. The vertical transfer unit and the lower transfer unit The vertical telescopic transport unit is configured to be capable of turning or swinging around the attachment portion of the transport base, and the bulk cargo is transported by natural fall or at the connection portion of the attachment portion and the connection portion. This is a method of transporting the bulk cargo from above to below in the vertical direction to the upper transport unit that transports the bulk cargo in the horizontal direction .

  According to this method, since it is a liquid seal, disconnection and connection between the connection upper part and the connection lower part, the turning of the turning part, the expansion and contraction of the vertical extension part becomes easy, and in the connected state, airtightness can be secured, Even with a large opening, airtightness can be constantly secured. In addition, since the airtightness and elasticity can be easily secured even in the expansion / contraction part formed of two or more cylindrical bodies, the connection upper part and the connection lower part are separated (separated) and connected, and the expansion / contraction of the vertical expansion / contraction part is easy. Can be done.

  In the gas hydrate handling method described above, the transport in the upper transport section and the lower transport section is performed by transport of a belt conveyor that transports in the horizontal direction, and the transport in the vertical transport section and the vertical telescopic transport section is by natural fall. When transported or transported by a belt conveyor that transports a transported object in the vertical direction, a transport device used for transporting dry gas hydrate can be configured by a combination of simple devices.

  The above-described bulk cargo handling method that generates combustible gas is an optimal cargo handling method for handling gas hydrate as bulk cargo that generates combustible gas. However, the present invention is not limited to gas hydrate, and can be applied to bulk cargoes that generate other combustible gases.

  According to the cargo handling apparatus for bulk cargo that generates flammable gas according to the present invention, an airtight structure between the connecting portion and the mounting portion, an airtight structure between the upper and lower swivel portions, and a telescopic portion of the vertical telescopic conveying portion As one of the airtight structures in the above, a liquid-tight airtight structure using the liquid U-shaped tube effect is adopted, so that it is possible to ensure airtightness and stretchability at the connecting portion with a very simple configuration. it can. In addition, since the airtight structure by the liquid seal becomes a static device, precise control and complicated maintenance are not required. Furthermore, since the liquid seal portion can be accommodated only in the vicinity of the outer periphery of the application portion and can also be used as a structure for expansion and contraction, the structure of the application portion can be greatly simplified.

  Moreover, according to the configuration of the support cart of the cargo handling apparatus for bulk cargo that generates flammable gas according to the present invention, the cargo can be handled while appropriately changing the land-side transport base, and the land-side transport Since the range in which the cargo can be handled with respect to the service base is widened, the movement of the support cart is reduced, and the cargo handling efficiency can be increased.

  Moreover, since it is set as the structure which turns below the vertical conveyance part arrange | positioned on the sea side, the weight of a turning part can be reduced and the structure of a turning part can be simplified. In addition, since the vertical telescopic transport unit is provided at the part connected to the hold, the scraping unit is tilted in the vertical plane in the vertical plane like an unloader for bulk cargo such as coal. Is not inserted into the hold or pulled out from the hold, so that the tilting mechanism is not required and airtightness is easily maintained.

  In addition, by configuring the upper transport unit, the vertical transport unit, the lower transport unit, and the vertical telescopic transport unit so as to be able to turn or swing around the mounting portion of the transport base, the cargo handling range with respect to the transport base is remarkably widened. It is possible to improve the cargo handling efficiency by reducing the number of transportation bases and the number of connections.

  Therefore, according to the bulk cargo handling device for generating combustible gas of the present invention, cargo generating combustible gas such as pellet-like gas hydrate is transported between the land-side transport base and the ship. In the section, cargo can be handled while maintaining an airtight state with the outside air, and the same effect can be obtained by the bulk cargo handling method for generating combustible gas of the present invention.

  BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a bulk cargo handling apparatus for generating combustible gas and a bulk cargo handling method for generating combustible gas according to an embodiment of the present invention will be described below with reference to the drawings. The rate handling method will be described as an example. 1 and 2 show a bulk cargo handling apparatus for generating combustible gas according to an embodiment of the present invention, FIG. 3 and FIG. 4 show the structure of the connecting portion, and FIG. 5 and FIG. FIG. 7 and FIG. 8 show the structure of the vertical telescopic transport unit. Here, gas hydrate will be described as an example of bulk cargo that generates flammable gas, but the present invention is not limited to this, and other bulk cargo that generates flammable gas may be used. Is applicable.

  As shown in FIGS. 1 and 2, a gas hydrate cargo handling device 1, which is a bulk cargo handling device that generates combustible gas according to an embodiment of the present invention, generates a pellet-like combustible gas. Gas hydrate A as cargo is a device for loading and unloading, etc., between the transportation base 3 on land 4 and the hold 2a of bulk cargo ship (ship) 2 Since hydrate A generates flammable gas, it is configured to maintain airtightness during cargo handling.

  First, the configuration of the gas hydrate cargo handling apparatus 1 will be described. The gas hydrate cargo handling apparatus 1 includes a support carriage 10, an upper transport unit 20, a lower transport unit 30, a vertical transport unit 40 that connects the upper transport unit 20 and the lower transport unit 30, and a lower transport unit 30. It has a vertical telescopic conveyance unit 50 that is descending. The upper transport unit 20, the lower transport unit 30, the vertical transport unit 40, and the vertical telescopic transport unit 50 are mounted on a support carriage 10 that moves on the land 4 along the quay.

  The upper conveyance part 20 is connected to the connection upper part (attachment part) 3a of the transportation base 3 so that the connection lower part (connection part) 20a is detachable and turnable on the upper side of one end side arranged on the land side. It is configured and connected to the vertical conveyance unit 40 on the lower side of the other end side disposed on the sea side, and connected to the lower conveyance unit 30 via the vertical conveyance unit 40. The upper transport unit 20 is provided with a first transport device 21 formed by a horizontal belt conveyor or the like.

  The lower conveyance unit 30 is connected to the vertical conveyance unit 40 on the upper side on one end side arranged on the land side, and is connected to the vertical telescopic conveyance unit 50 on the lower side on the other end side arranged on the sea side. The lower transport unit 30 is provided with a second transport device 31 formed by a horizontal belt conveyor or the like.

  The vertical transport unit 40 includes a swivel upper part 41 and a swivel lower part 42 connected to the swivel upper part 41 so that the lower transport part 30 can swivel with respect to the upper transport part 20. . Further, the vertical telescopic conveyance unit 50 is configured to be expandable and contractable in accordance with the vertical displacement of the lower end 53f.

  In this gas hydrate cargo handling apparatus 1, the transport in the upper transport unit 20 and the lower transport unit 30 is performed by the transport of the belt conveyor 21 that transports in the horizontal direction, and the transport in the vertical transport unit 40 and the vertical telescopic transport unit 50 is naturally dropped. Or by a belt conveyor (not shown) that conveys in the vertical direction.

  And the airtight structure between the connection lower part (connection part) 20a and the connection upper part (attachment part) 3a, the airtight structure between the turning upper part 41 and the turning lower part 42, and the airtight structure in the expansion / contraction part of the vertical expansion / contraction conveying part 50 are: The partition part is inserted into the liquid reservoir part, and the liquid reservoir part is divided into an inner peripheral side chamber and an outer peripheral side chamber, and the lower part of the inner peripheral side chamber and the outer peripheral side chamber are configured to communicate with each other so that the liquid flows. It is configured using an airtight structure that hermetically seals between the upper part of the inner peripheral side chamber and the upper part of the outer peripheral side chamber by the liquid put in the container. Hereinafter, these structures will be described.

  As shown in FIGS. 3 and 4, the airtight structure of the connection upper part (attachment part) 3a of the transport base 3 and the connection lower part (connection part) 20a of the upper transport part 20 is configured as follows.

  The connection upper part 3 a is configured by providing an upper flange portion 3 ab on a cylindrical body 3 aa that protrudes on the lower surface side of the transfer base 3, and is fixed to the transfer base 3. The cylindrical body 3aa is extended below the upper flange portion 3ab to provide a partition 3ad, and a cover 3ac is provided on the inner peripheral side of the cylindrical body 3aa. The cover 3ac is formed in a conical shape so that the lower side is narrow so as to cover the inner peripheral chambers 20be and 20ce so that the gas hydrate A passing through the connection upper part 3a does not enter the liquid reservoirs 20bd and 20cd described later. Or formed with a cloth-like cover. As a result, the gas hydrate A enters the liquid reservoirs 20bd and 20cd, and the occurrence of problems such as the gas hydrate A being sandwiched between the part responsible for the airtight function and the movable part when disconnected or connected has a very simple structure. Can be prevented.

  The connecting lower portion 20a is composed of an upper cylindrical body 20b, a lower cylindrical body 20c, and a hydraulic cylinder (actuator) 20d. The lower cylindrical body 20c and the hydraulic cylinder 20d are attached to the casing of the upper transport unit 20. It is fixed.

  The upper cylindrical body 20b is provided with a lower flange portion 20aa at its upper end and a liquid reservoir portion 20bd on its inner peripheral side. The lower flange portion 20aa is fixed to the upper end side of the hydraulic cylinder 20d and moves up and down by the expansion and contraction of the hydraulic cylinder 20d. The liquid reservoir 20bd is composed of a double wall structure composed of an outer peripheral wall 20ba and an inner peripheral wall 20bb and its bottom 20bc. In order to supply the liquid B for liquid sealing to the liquid reservoir 20bd, the liquid replenishing tank 20bg is connected to the liquid reservoir 20bd by a pipe 20bh. The liquid reservoir 20bd serves as a partition for the lower liquid reservoir 20cd.

  The lower cylindrical body 20c is configured to have a liquid pool portion 20cd composed of a double wall structure composed of an outer peripheral wall 20ca and an inner peripheral wall 20cb and a bottom portion 20cc thereof. The bottom portion 20cc is configured as a part of the casing of the upper transport unit 20 in the configuration of FIGS. In order to supply the liquid B for liquid sealing to the liquid reservoir 20cd, a liquid replenishment tank 20cg is connected to the liquid reservoir 20cd by a pipe 20ch.

  And the partition part 20bd used also by the liquid reservoir part 20bd of the upper cylindrical body 20b is inserted in the liquid reservoir part 20cd of the lower cylindrical body 20c. In other words, the plurality of cylindrical bodies 20b, 20c are partially overlapped and arranged continuously in the vertical direction. By changing the length Lbc of the overlapping portions of these cylindrical bodies 20b and 20c, in other words, the insertion depth Lbc, the overall length La of the cylindrical body is changed. The change in the length La in the vertical direction is performed by expansion and contraction of the hydraulic cylinder 20d.

  And the following airtight structure by liquid sealing is provided in the connection part of upper flange part 3ab and lower flange part 20aa, and the overlapping part of the two cylindrical bodies 20b and 20c.

  In this connection part, the partition part 3ad provided in the connection upper part 3a is inserted into the liquid reservoir part 20bd provided in the cylindrical body 20b above the connection lower part 20a, and this liquid reservoir part 20bd is connected to the inner peripheral side chamber 20be and the outer periphery. In addition to being divided into side chambers 20bf, the inner chamber 20be and the lower portion of the outer chamber 20bf are configured to communicate with each other so that the liquid B flows. Thereby, the space between the upper part of the inner peripheral side chamber 20be and the upper part of the outer peripheral side chamber 20bf is hermetically sealed by a liquid seal by the U-shaped tube effect of the liquid B put in the liquid reservoir 20bd.

  Moreover, in the overlapping part of the two cylindrical bodies 20b and 20c, the partition part 20bd which also serves as the liquid reservoir part 20bd of the upper cylindrical body 20b is inserted into the liquid reservoir part 20cd of the lower cylindrical body 20c, The liquid reservoir portion 20cd is divided into an inner peripheral chamber 20ce and an outer peripheral chamber 20cf, and the lower portion of the inner peripheral chamber 20ce and the outer peripheral chamber 20cf is configured to communicate with the liquid B, and is placed in the liquid reservoir 20cd. The liquid B seals the space between the upper part of the inner peripheral side chamber 20ce and the upper part of the outer peripheral side chamber 20cf by liquid sealing. With this configuration, even in the stretchable part formed by the two cylindrical bodies 20b and 20c, airtightness and stretchability can be easily secured, so that the connection upper part 3a and the connection lower part 20a can be easily disconnected and connected. it can.

  The overlapping of the cylindrical bodies can be similarly formed in three or more cylindrical bodies, but the upper cylindrical body partition portion does not come out of the lower liquid reservoir portion. In addition, a regulating member such as a chain is provided so as to regulate the maximum amount of overlap.

  In addition, when the number of cylindrical bodies increases and the partition portion is also used as the liquid reservoir, the width of the partition portion increases. Therefore, the liquid reservoir 20bd does not serve as the partition portion and the liquid reservoir By providing a partition portion formed of a partition plate or the like extending from the inner peripheral wall 20bb below the portion 20bd, the width of the partition portion can be reduced. In this case, since the liquid reservoir 20bd becomes shallow, the overlapping portion Lbc at the time of extension tends to be small, which is suitable when the difference between the internal pressure and the external pressure is small and the pressure fluctuation is small.

  Moreover, the shape of the connection upper part 3a and the connection lower part 20a should just be the structure which can insert the partition part 3ad of the connection upper part 3a in the liquid reservoir part 20bd of the connection lower part 20a, and the horizontal cross section of the partition part 3ad and the liquid reservoir part 20bd The shape is circular when mutual rotational movement is allowed. In addition, when it is not necessary to consider rotational movement, it is not limited to a circular shape, and may be an arbitrary shape such as an ellipse or a polygon. In addition, since the liquid B is used, the moving direction for disconnection and connection is preferably the vertical direction (vertical direction). However, by devising the shape of the liquid reservoir 20bd and the shape of the partition 3ad, the vertical direction Therefore, the present invention can also be applied to the case of extending or contracting in a direction inclined to some extent.

  As the liquid sealing liquid B to be put into the liquid reservoirs 20bd and 20cd, it is conceivable to use a liquid having a large specific gravity. However, when the liquid reservoirs 20bd and 20cd become low temperature due to the handling of natural gas hydrate, etc. Use antifreeze or circulate seawater or water. If seawater or water is used, it can be used easily, and even if the liquid B for liquid sealing leaks out, contamination of the sea area or water can be avoided, and the liquid B for liquid sealing is ensured. Therefore, the problem of environmental pollution and the problem of storage of liquid for sealing can be avoided.

  Furthermore, due to the change in volume of the liquid reservoirs 20bd and 20cd due to the insertion of the partition parts 3ad and 20bd into the liquid reservoirs 20bd and 20cd due to the expansion / contraction amount Lbc of the expansion / contraction part, and evaporation or leakage of the liquid B for liquid sealing In order to automatically compensate for the decrease, the liquid B for liquid sealing is supplied from the liquid replenishing tanks 20bg and 20cg to the liquid reservoirs 20bd and 20cd.

  When the liquid B is supplied, the liquid replenishing tanks 20bg and 20cg are installed at an appropriate height so that the liquid level in the liquid reservoirs 20bd and 20cd is monitored, and the liquid in the liquid reservoirs 20bd and 20cd is monitored. While maintaining the liquid level at an appropriate level with an appropriate amount, an abnormal internal pressure is detected by detecting an abnormal rise or fall of the liquid level.

  When the pressure difference between the internal pressure and the external pressure (atmospheric pressure) is large, it is preferable to use a liquid with a large specific gravity. When the pressure fluctuation of the internal pressure is large, a liquid with a large viscosity is used to change the liquid level. Is preferably reduced. In addition, it is not desirable that the liquid used for liquid sealing evaporates or burns in the event of a fire. For example, liquids may be provided in multiple layers.

  Further, in the connected state, the connection lower portions 20a and 20Aa are configured to be able to turn the entire portion ahead of the upper transfer portion 20 with respect to the connection upper portions 3a and 3Aa of the transfer base 3. For example, as shown in FIG. 1, an arc-shaped rail 12 centering on the axis 22 of the connection upper portions 3a, 3Aa and the connection lower portions 20a, 20Aa is laid on the upper surface of the support carriage 10, as shown in FIG. 12 is swung or swung by running the upper transport unit 20 on the top. As the turning power, a hydraulic motor or the like can be used when driving the wheel 23, and a hydraulic cylinder or the like connecting the support carriage 10 side and the upper transport unit 20 can be used when swinging. .

  The separation (separation) and connection in the connection portions 3a and 20a will be described. In the connected state as shown in FIG. 3, the partition portion 3ad is inserted into the liquid reservoir portion 20bd, and the partition portion 20bd that is also used as the liquid reservoir portion 20bd is inserted into the liquid reservoir portion 20cd, and is kept airtight by liquid sealing at two locations. Has been done.

  In order to shift from the state of FIG. 3 to the state of FIG. 4, the airtight door (not shown) is closed on the transport base 3 side and the upper transport unit 20 side, and the transport base 3 side and the upper transport unit 20 side are closed. After maintaining the airtightness and preventing the combustible gas from flowing out from the transport base 3 side to the connection upper part 3a and from the upper transport part 20 side to the connection lower part 20a, the combustible gas inside the connection sandwiched between the airtight doors is removed. Replace with inert gas. Thereafter, the connection upper part 3a and the connection lower part 20a are brought into a state where they may be opened to the atmosphere.

  In this state, if necessary, after fixing between the connection upper part 3a and the connection lower part 20a, for example, fastening between the upper flange part 3ab and the lower flange part 20aa, is released, the hydraulic cylinder 20d. The lower flange portion 20aa is pulled down and separated from the upper flange portion 3ab. By lowering the lower flange portion 20aa, the partition portion 3ad is extracted from the liquid pool portion 20bd, while the partition portion 20bd also serving as the liquid pool portion 20bd (or the partition plate 20bba below the liquid pool portion 20bd). The depth Lbc inserted into the liquid reservoir 20cd increases. When the partition part 3ad is completely extracted from the liquid B of the liquid reservoir part 20bd, the airtightness between the inside and the outside is released, the connection upper part 3a and the connection lower part 20a are separated, and the atmosphere is opened. Further, when the lower flange portion 20aa is lowered and the lower flange portion 20aa and the inner peripheral wall 20bb are lower than the lower end of the partition portion 3ad, the lower flange portion 20aa is stopped from being lowered.

  In this state, the upper conveyance unit 20 of the bulk cargo handling apparatus 1 is separated from the conveyance base 3. And the vertical telescopic conveyance part 50 and the hold 2a are cut | disconnected, hold | maintaining airtight as needed, or releasing air | atmosphere as needed. At the time of detachment, if necessary, the space between the vertical telescopic conveying unit 50 and the upper conveying unit 20 is kept airtight against the atmosphere, and any leakage of flammable gas generated from cargo for cargo handling is avoided. You may make it reduce. In this separated state, the bulk cargo handling device 1 can travel on the rail 4a of the land 4 with the support carriage 10 and move, so in this state, the cargo hold 2a that is the next cargo handling target or the carrier Move to base 3. And the connection lower part 20a of the upper conveyance part 20 is moved to the position which opposes the connection upper part 3a of the conveyance base 3 for cargo handling.

  Next, in order to shift from the state of FIG. 4 to the state of FIG. 3, the hydraulic cylinder 20d is extended and the lower flange portion 20aa is pulled up while maintaining the airtightness on the side of the transportation base 3. By raising the lower flange portion 20aa, the partition portion 3ad is inserted into the liquid reservoir portion 20bd, while the partition portion 20bd (or the partition plate 20bba) also serving as the liquid reservoir portion 20bd is inserted into the liquid reservoir portion 20cd. Depth Lbc decreases. When the partition 3ad is inserted into the liquid B of the liquid reservoir 20bd, the inside and the outside are kept airtight. Further, when the lower flange portion 20aa is lifted and the lower flange portion 20aa is brought into contact with the upper flange portion 3ab, the lower flange portion 20aa is stopped to be lifted. If necessary, an operation of fixing the connection upper portion 3a and the connection lower portion 20a, for example, a fastening operation of the lower flange portion 20aa and the upper flange portion 3ab is performed. Even if this fixing work is not performed, the partition part 3ad is inserted into the liquid B of the liquid reservoir 20bd to maintain airtightness. Carry out the cargo handling work.

  In this state, the upper conveyance unit 20 of the bulk cargo handling apparatus 1 is connected to the conveyance base 3 while maintaining an airtight state. And the vertical expansion-contraction conveyance part 50 is connected to the cargo hold 2a side of cargo handling object, and airtightness is maintained also in this part. After replacing the air inside the connection part sandwiched between the airtight doors on the transport base 3 side and the upper transport part 20 side with an inert gas, the airtight doors on the transport base 3 side and the upper transport path 20 side are opened, Further, if necessary, by opening an airtight door between the hold 2a and the upper transport unit 20, the transport base 3, the connection upper part 3a, the connection lower part 20a, the upper transport part 20, the vertical transport part 40, the lower transport The part 30, the vertical telescopic conveying part 50, and the hold 2a communicate with each other while maintaining an airtight state.

  As shown in FIGS. 5 and 6, the vertical transport unit 40 includes a swivel upper part 41 and a swivel lower part 42. An airtight structure is provided. The liquid-tight airtight structure is also the same as the connection upper part 3a and the connection lower part 20a, the turning upper part 41 is formed with a cylindrical wall 41a, and a flange part 41b is provided in the middle part thereof. A partition portion 41c formed of a cylinder or the like is provided on the lower end side. On the other hand, the swivel lower part 42 is configured to have a liquid reservoir part 42d formed by a cylindrical outer peripheral wall 42a, an inner peripheral wall 42b, and a bottom part 42c between the double walls. Further, in order to prevent the bulk cargo A from entering the inner circumferential side chamber 42e of the swivel lower portion 42 described below, a cover 41d formed in a conical shape or the like having a narrower lower side at an appropriate position inside the cylindrical wall 41a. A cloth-like cover or the like is provided.

  Further, a partition 41c is inserted into the liquid reservoir 42d to divide it into an inner peripheral side chamber 42e and an outer peripheral side chamber 42f. At the same time, the lower part of the inner peripheral side chamber 42e and the outer peripheral side chamber 42f are communicated so that the liquid B flows. Then, the liquid B put in the liquid reservoir 42d seals the space between the upper part of the inner peripheral side chamber 42e and the upper part of the outer peripheral side chamber 42f by liquid sealing by the U-shaped tube effect of the liquid B.

  Further, in order to automatically compensate for the decrease due to evaporation or leakage of the liquid sealing liquid B, the liquid sealing liquid B can be supplied to the liquid reservoir 42d by the liquid replenishing tank 42h and the pipe 42i. The supply of the liquid B and the liquid B, the monitoring of the liquid level in the liquid reservoir 42d, and the like are substantially the same as those of the vertical telescopic conveyance unit 50.

  Since the airtight structure of the swivel unit 5 provides a liquid-tight airtight structure, even if the swivel upper part 41 and the swivel lower part 42 swivel relatively, the airtightness can be easily maintained, and only a small opening part can be maintained. In addition, even with a large opening, airtightness can be constantly secured.

  Further, by putting an inert gas (inert gas) C such as nitrogen gas into the space above the liquid level of the outer peripheral side chamber 42f, even if flammable gas leaks, this space portion or this space Since it can prevent that the vicinity part connected to becomes an explosive atmosphere, safety | security can be increased more.

  Note that the bottom portion 42c between the double walls only needs to be secured by the liquid reservoir portion 42d to have a depth sufficient to maintain airtightness, and is not necessarily limited to the case (housing) of the lower conveyance portion 30 as shown in the drawing. Need not be at the same level.

  Further, as a mechanism of the turning unit 5 for turning, for example, a bearing 43 is disposed between the upper flange portion 41b of the turning upper portion 41 and the lower flange portion 42g of the turning lower portion 42, and a motor and a gear (not shown) are arranged. By this mechanism, a turning force is applied to the turning lower portion 42. In addition, the weight of the lower conveyance part 30 can be supported with the support trolley | bogie 10 by the structure which is not shown in figure, or it can be suspended from the upper conveyance part 20, and can be supported. This support can be easily performed by a known technique.

  As shown in FIGS. 7 and 8, the vertical telescopic conveyance unit 50 is composed of a plurality (three in FIGS. 7 and 8) of cylindrical bodies 51, 52, 53, and the plurality of cylindrical bodies 51, 52 and 53 are partially overlapped and arranged continuously in the vertical direction. By changing the lengths L12 and L23 of the overlapping portions of these cylindrical bodies 51, 52 and 53, in other words, the insertion depths L12 and L23 of the partition 51a into the liquid reservoir 52b, the cylindrical bodies are changed. The vertical length Lt of the vertical telescopic transport unit 50 as a whole is changed. The upper end of the vertical telescopic conveyance unit 50 is a flange 51b provided on the uppermost cylindrical body 51, and is connected to the lower conveyance unit 30 shown in FIG. On the other hand, the lower end of the vertical telescopic conveyance unit 50 is a flange portion 53f provided in the lowermost cylindrical body 53 and is connected to the hold 2a side.

  Also in this overlapping portion, a liquid-tight airtight structure similar to the connection upper portion 3a and the connection lower portion 20a is provided. A connecting portion between the uppermost tubular body 51 and the intermediate tubular body 52, in other words, a liquid having a partition 51a on the lower end side of the uppermost tubular body 51 provided in the intermediate tubular body 52 in the overlapping portion. Inserted into the reservoir 52b, the liquid reservoir 52b is divided into an inner peripheral chamber 52ba and an outer peripheral chamber 52bb. At the same time, the lower part of the inner peripheral side chamber 52ba and the outer peripheral side chamber 52bb are communicated so that the liquid B flows. With the liquid B put in the liquid reservoir 52b, the space between the upper part of the inner peripheral side chamber 52ba and the upper part of the outer peripheral side chamber 52bb is hermetically sealed.

  The partition 51 a on the lower end side of the uppermost cylindrical body 51 also serves as the lower part of the wall surface 51 a of the cylindrical body 51. Further, the liquid reservoir 52b of the intermediate cylindrical body 52 is constituted by a double tube structure formed by an outer peripheral wall 52aa, an inner peripheral wall 52ab, and a bottom 52ac. And the partition part 51a of the lower end side of the uppermost cylindrical body 51 is inserted in the liquid reservoir part 52b comprised by the double pipe structure of this intermediate cylindrical body 52, and the liquid B is inserted into this liquid reservoir part 52b. Then, gas is sealed by the U-shaped tube effect of the liquid B formed by the liquid reservoir 52b.

  Further, in the overlapping portion of the intermediate cylindrical body 52 and the lowermost cylindrical body 53, the liquid reservoir 52b portion of the intermediate cylindrical body 52 is also used as the partitioning portion 52a. The partition part 52a also serving as a liquid reservoir part is inserted into the liquid reservoir part 53c of the lowermost cylindrical body 53, and the liquid reservoir part 53c of the lowermost cylindrical body 53 is divided into an inner peripheral side chamber 53ca and an outer peripheral side chamber 53cb. At the same time, the lower part of the inner peripheral side chamber 53ca and the outer peripheral side chamber 53cb are communicated so that the liquid B flows. By the liquid B put in the liquid reservoir 53c of the lowermost cylindrical body 53, the space between the upper part of the inner peripheral side chamber 53ca and the upper part of the outer peripheral side chamber 53cb is hermetically sealed.

  The cylindrical bodies 51, 52, and 53 may be configured so that the upper partition parts 51a and 52a can be inserted into the liquid pool parts 52b and 53c of the lower cylindrical body. The cross-sectional shape is not limited to a circle but may be an ellipse, a polygon, or the like. 7 and 8, the vertical telescopic conveying unit 50 constituted by three cylindrical bodies has been described. However, the case of two or three or more can be similarly configured. In addition, as the number of cylindrical bodies increases and the partition portion is also used as the liquid reservoir, the width of the partition increases, so the partition formed by a partition plate or the like below the liquid reservoir By providing the portion, it is preferable that the width of the partition portion is narrowed and an overlapping portion is appropriately provided.

  According to this configuration, since it is liquid-sealed, even if the upper cylindrical body 51 (or 52) and the lower cylindrical body 52 (or 53) move up and down relatively, airtightness can be easily achieved. Since it can be maintained, airtightness can be constantly secured not only with a small opening but also with a large opening. Further, since the liquid seal portion is accommodated only in the outer peripheral side portion of the connection portion between the upper cylindrical body 51 (or 52) and the lower cylindrical body 52 (or 53), the structure can be simplified. Moreover, it can also be used as a structure for vertical expansion and contraction. Moreover, since the resistance for airtightness in the expansion / contraction portion due to the vertical movement is also the resistance due to the viscosity of the liquid, it can be made very small when the vertical speed of expansion / contraction is slow. Furthermore, by providing a clearance in the width direction of the overlapping portions L12 and L23, it is possible to reduce the fluctuation of the ship in the horizontal and longitudinal directions (roll) and movement (sway, yaw) due to waves. If it can be absorbed.

  Further, a cover 51c that covers the inner peripheral chambers 52ba and 53ca so that the transported object A such as natural gas hydrate pellets passing through the cylindrical bodies 51, 52, and 53 does not enter the liquid reservoirs 52b and 53c. 52e is provided, so that the transported object A such as natural gas hydrate pellets enters the liquid reservoirs 52b and 53c, and the transported object A is caught between the parts responsible for the airtight function. Prevent with a simple structure.

  Further, the change in volume of the liquid reservoirs 52b and 53c due to the change in the insertion amounts L12 and L23 of the partition parts 51a and 52a into the liquid reservoirs 52b and 53c due to the expansion and contraction amount of the vertical expansion and contraction transport unit 50, and the liquid sealing In order to automatically compensate for the decrease due to evaporation or leakage of the liquid B, the liquid replenishing tanks 52c and 53d and the pipes 52d and 53e are configured so that the liquid sealing liquid B can be supplied to the liquid reservoirs 52b and 53c. The supply of the liquid B and the liquid B and the monitoring of the liquid level in the liquid reservoirs 52b and 53c are substantially the same as the connection upper part 3a and the connection lower part 20a.

  As described above, the airtight structure between the connection lower part (connection part) 20a and the connection upper part (attachment part) 3a, the airtight structure between the turning upper part 41 and the turning lower part 42, and the expansion / contraction part of the vertical telescopic conveyance part 50 Since the airtight structure employs a liquid-tight airtight structure utilizing the liquid U-shaped tube effect, the following effects can be achieved.

  In the connection upper part 3a (or 3Aa) and the connection lower part 20a (or 20Aa), since the airtightness and the stretchability can be easily secured by the stretchable part formed of two or more cylindrical bodies, it is easy to separate and connect. In addition, airtightness can be secured even in a connected state. Moreover, in the turning part 5, even if the turning upper part 41 and the turning lower part 42 turn relatively, airtightness can be easily maintained. Furthermore, in the vertical telescopic conveyance unit 50, airtightness and stretchability can be ensured. Further, even if these portions are large openings, airtightness can be constantly secured.

  And since said gas hydrate cargo handling apparatus 1 is comprised including said connection part 3a, 20a (or 3Aa, 20Aa), connection part 3a, 20a (or 3Aa) of gas hydrate cargo handling apparatus 1 is comprised. , 20 Aa) can be secured. Therefore, even if combustible gas etc. generate | occur | produce, it does not leak out of the gas hydrate cargo handling apparatus 1, and outside air does not enter the gas hydrate cargo handling apparatus 1 conversely. Accordingly, when the gas hydrate A that generates combustible gas is transported as bulk cargo, it can be safely transported while being cut off from the outside air.

  Next, cargo handling in the gas hydrate cargo handling apparatus 1 will be described. In this gas hydrate cargo handling apparatus 1, during cargo handling, the vehicle moves on the rail 4a on the land 4 with the wheels 11 to the vicinity of the cargo hold 2a to be handled. Thereafter, a connection lower part 20a which is a connection part of the upper conveyance part 20 of the bulk cargo handling device 1 is connected to a connection upper part 3a which is an attachment part of the nearest conveyance base 3, and the gas hydrate A is conveyed. It is transferred from the base 3 to the hold 2a via the connection upper part 3a, the connection lower part 20a, the upper transfer part 20, the vertical transfer part 40, the lower transfer part 30, and the vertical telescopic transfer part 50.

  In the case of this cargo handling, the horizontal movement of the upper conveyance unit 20 and the lower conveyance unit 30 is performed by the first conveyance device (horizontal conveyor) 21 disposed in the upper conveyance unit 20 or the first conveyance device disposed in the lower conveyance unit 30. No. 2 transport device (horizontal conveyor) 31 or the like is used, and the downward movement of the vertical transport unit 40 and the vertical telescopic transport unit 50 uses natural fall or a vertical conveyor. At this time, the lower conveyance unit 30 is swung in a horizontal plane with the vertical conveyance unit 40 as a rotation axis, and is loaded evenly in the hold 2a.

  When this cargo hold 2a reaches the loaded amount, the cargo handling target is set to the next hold 2a. When the next hold 2a is within the turning range of the upper transfer path 20 and the lower transfer unit 30, the transfer base 3 is not changed, and only the turn of the upper transfer path 20 and the lower transfer unit 30 is performed. Carry out loading and unloading. When the next cargo hold 2a is not within the turning range of the upper transport path 20 and the lower transport section 30, the connection lower section 20a of the upper transport section 20 is detached from the connection upper section 3a of the transport base 3 and supported up to the next hold 2a. The carriage 10 is caused to travel on the rail 4a by the wheels 11, and the upper transport unit 20 is connected to the nearest transport base 3 to perform the same loading operation.

  In the unloading, the natural gas hydrate A is transferred from the hold 2a to the land by an apparatus in which a horizontal transfer unit and a vertical transfer unit are appropriately combined in the same manner as the loading operation.

  This gas hydrate handling method includes an upper transport unit 20 that can be connected to the transport base 3 on the land 4 side, a lower transport unit 30 that is pivotably connected to the upper transport unit 20 via a vertical transport unit 40, The gas hydride between the transport base 3 on the land 4 side and the ship 2 in the gas hydrate cargo handling device 1 in which the vertical telescopic transport unit 50 descending from the lower transport unit 30 is mounted on the support carriage 10. It is a rate cargo handling method, an airtight structure between the connection lower part 20a and the attachment part 3a, an airtight structure between the upper part 41 and the lower part 42, and an airtight structure in the expansion / contraction part of the vertical telescopic conveyance part 50, It is inserted into the liquid reservoir, and the liquid reservoir is divided into an inner peripheral chamber and an outer peripheral chamber, and the inner peripheral chamber and the lower portion of the outer peripheral chamber are communicated with each other so that liquid can flow therethrough. , Inner circumference side While using an airtight structure that airtightly seals between the upper part of the outer peripheral side chamber and the upper part of the outer peripheral side chamber, the upper transfer part is connected to the mounting part 3a of the transfer base 3 on the land 4 side nearest to the cargo hold 2a to be handled by the ship 2 20, the gas hydrate A from the transfer base 3 is connected via the upper transfer unit 20, the vertical transfer unit 40, the lower transfer unit 30, and the vertical telescopic transfer unit 50. Then, it is transported to the cargo hold 2 a disposed at the lower end of the vertical telescopic transport unit 50.

  Therefore, according to the gas hydrate handling method described above, the gas hydrate in a pellet form or the like is kept in an airtight state between the outside air in the transfer section between the transfer base 3 on the land 4 side and the ship 2. Can be unloaded.

It is sectional drawing which shows typically the structure of the gas hydrate cargo handling apparatus of embodiment which concerns on this invention. It is a top view which shows typically the structure of the gas hydrate cargo handling apparatus of embodiment which concerns on this invention. It is a sectional side view which shows typically the state where the airtightness of the connection part and the expansion-contraction structure were shortened. It is a sectional side view which shows typically the state which the airtight of the connection part of FIG. 3 and the expansion-contraction structure extended. It is a sectional side view which shows typically the structure of the vertical conveyance part which has a turning part of an airtight structure. It is a sectional side view which shows typically the structure of the turning part of FIG. It is a sectional side view which shows typically the state where the airtightness of the vertical expansion-contraction conveyance part and the expansion-contraction structure were shortened. It is a sectional side view which shows typically the state which the airtight of the vertical expansion-contraction conveyance part of FIG. 7 and the expansion-contraction structure extended.

Explanation of symbols

1 Gas hydrate handling equipment (unloading equipment for bulk cargo that generates flammable gas)
2 Bulk carrier 3 Transport base 3a Connection upper part (mounting part)
3aa Upper cylindrical body 3ab Upper flange portion 3ac Cover 3ad Partition portion 3b Lower cylindrical body 3bd Partition portion (also used as a liquid pool portion)
3ca hydraulic cylinder (actuator)
5 Turning part 10 Supporting carriage 20 Upper conveyance part 20a Connection lower part (connection part)
20aa Lower flange part 20b Upper cylindrical body 20bd Liquid reservoir part (also used as partition part)
20c Lower cylindrical body 20cd Liquid reservoir 20d Hydraulic cylinder (actuator)
30 Lower conveyance unit 40 Vertical conveyance unit 50 Vertical telescopic conveyance unit A Bulk cargo B Liquid La, LAa Vertical length Lab, Lbc Insertion depth (length of overlapping part)

Claims (4)

A cargo handling device that handles bulk cargo that generates flammable gas between a land-side transportation base and a ship,
A support carriage, an upper transport unit, a lower transport unit, a vertical transport unit connecting the upper transport unit and the lower transport unit, and a vertical telescopic transport unit descending from the lower transport unit;
The upper transport unit, the lower transport unit, the vertical transport unit, and the vertical telescopic transport unit are mounted on the support carriage that moves on land along a quay,
The upper transport unit is configured such that a connection part on one end side disposed on the land side is detachable and turnable with respect to the mounting part of the transport base, and the upper transport unit, the vertical transport unit, and the lower transport unit And the vertical telescopic transport unit are configured to be turnable or swingable around the mounting portion of the transport base, and connected to the vertical transport unit at the other end disposed on the sea side,
The lower transport unit is connected to the vertical transport unit on one end side disposed on the land side, and is connected to the vertical telescopic transport unit on the other end side disposed on the sea side,
The vertical transport unit is configured to have a swivel upper part and a swivel lower part that is pivotally connected to the swivel upper part so that the lower transport part can swivel with respect to the upper transport part,
The vertical telescopic conveyance unit is configured to be expandable and contractible in accordance with the vertical displacement of the lower end portion,
Furthermore, any one of an airtight structure between the connection part and the attachment part, an airtight structure between the upper turning part and the lower turning part, and an airtight structure in the expansion / contraction part of the vertical telescopic conveyance part,
The partition part is inserted into the liquid reservoir part, and the liquid reservoir part is divided into an inner peripheral side chamber and an outer peripheral side chamber, and the inner peripheral side chamber and the lower part of the outer peripheral side chamber are configured to communicate with each other so that liquid flows. Using an airtight structure that hermetically seals between the upper part of the inner peripheral side chamber and the upper part of the outer peripheral side chamber by the liquid placed in the reservoir,
In the connection portion between the attachment portion and the connection portion, the bulk cargo is transported to the upper transport portion that transports the bulk cargo from top to bottom in a horizontal direction by transport by natural fall or transport in the vertical direction. A cargo handling device for bulk cargo that generates combustible gas. An arc-shaped rail centering on the axis of the mounting portion and the connecting portion is laid on the upper surface of the support carriage, and the upper transporting portion travels on the rail to turn or swing. A cargo handling apparatus for bulk cargo generating combustible gas according to claim 1.   The cargo handling apparatus for bulk cargo generating combustible gas according to claim 1 or 2, wherein gas hydrate is loaded as bulk cargo generating combustible gas. An upper transport unit that can be connected to a land-side transport base, a lower transport unit that is pivotably connected to the upper transport unit via a vertical transport unit, and a vertical telescopic transport unit that descends from the lower transport unit In a bulk cargo handling device that generates flammable gas mounted on a support carriage, a method of cargo handling bulk cargo that generates flammable gas between a land-side transportation base and a ship, Connected to the mounting part of the transport base on the land side closest to the cargo handling cargo hold of the ship with a connection part on one end side of the upper transport part, and then combustible gas from the transport base The generated bulk cargo is transported to the cargo handling cargo hold arranged at the lower end of the vertical telescopic transport unit via the upper transport unit, the vertical transport unit, the lower transport unit, and the vertical telescopic transport unit. As well as
An airtight structure between the connecting portion and the mounting portion, an airtight structure between a swivel upper portion of the upper transport portion and a swivel lower portion of the lower transport portion that is pivotably connected to the swivel upper portion, the vertical telescopic transport portion The partition part is inserted into the liquid reservoir part, and the liquid reservoir part is divided into an inner peripheral side chamber and an outer peripheral side chamber, and liquid is formed in the lower part of the inner peripheral side chamber and the outer peripheral side chamber. Using an airtight structure in which the space between the upper part of the inner peripheral side chamber and the upper part of the outer peripheral side chamber is hermetically sealed by the liquid placed in the liquid reservoir,
Further, the connection between the attachment portion of the transfer base and the connection portion of the upper transfer portion is configured to be detachable and turnable, and the upper transfer portion, the vertical transfer portion, the lower transfer portion, and the vertical transfer portion The telescopic conveyance part is configured to be capable of turning or swinging around the attachment part of the conveyance base,
In the connection portion between the attachment portion and the connection portion, the bulk cargo is transported to the upper transport portion that transports the bulk cargo from top to bottom in a horizontal direction by transport by natural fall or transport in the vertical direction. A cargo handling method for bulk cargo that generates flammable gas.

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