CN116873122A - Semi-submersible pontoon and semi-submersible - Google Patents

Abstract

The application discloses a semi-submersible vessel buoyancy tank and a semi-submersible vessel, which comprise a buoyancy tank body, and a winch and a crane which are arranged on the top surface of the buoyancy tank body, wherein a cable guiding hole is formed in the periphery of the top surface of the buoyancy tank body, a cable guiding post is further arranged on the top surface of the buoyancy tank body, and the cable outlet of the winch can bypass the crane and extend to the cable guiding hole through the steering cable guiding of the cable guiding post. The scheme enriches the use functions of the semi-submersible vessel, when the buoyancy tank body prevents the vessel from mooring or tallying and rope-moving, the hauling rope provided by the winch at the top of the buoyancy tank body can be directly utilized for mooring or tallying, and the problem that the buoyancy tank prevents the vessel from mooring or tallying is solved. In addition, in order to enable the cable outlet of the winch to be smoothly led out from the cable guiding holes around the buoyancy tank body, the cable guiding columns are further arranged on the top surface of the buoyancy tank body, the cable outlet of the winch can be enabled to avoid a crane through the guiding of the cable guiding columns, and the problem that the crane interferes with the cable outlet is solved.

Description

Semi-submersible pontoon and semi-submersible

Technical Field

The application relates to the technical field of ships, in particular to a semi-submersible pontoon and a semi-submersible.

Background

The deck of the semi-submersible vessel is provided with the buoyancy tank, the position of the buoyancy tank on the deck can be adjusted according to the gravity center of loaded cargoes, and then the balance of the semi-submersible vessel is adjusted, so that the semi-submersible vessel can stably run on the sea surface. The existing buoyancy tanks on the semi-submersible vessel have single use function, and only have the function of adjusting the balance of the vessel through dead weight, and in some cases, the existence of the buoyancy tanks can prevent the vessel from mooring after entering ports or prevent the vessel from being tidied when loading cargoes.

Disclosure of Invention

The aim of the embodiment of the application is that: the semi-submersible pontoon and the semi-submersible vessel are provided, which can solve the problems in the prior art.

In order to achieve the above purpose, the application adopts the following technical scheme:

in one aspect, a semi-submersible pontoon is provided, including the pontoon body and set up in winch and the crane of the top surface of pontoon body, be provided with the cable guide hole around the top surface of pontoon body, the top surface of pontoon body still is provided with the cable guide post, through the cable guide post turns to, makes the cable of going out of winch can walk around the crane extends to the cable guide hole again.

Optionally, along the head and tail direction, the crane set up in the afterbody of buoyancy tank body, the winch set up in the middle part of buoyancy tank body, make the davit of crane can erect to on the winch, through the winch supports the davit.

Optionally, the winch comprises a first winch and a second winch, and the first winch and the second winch are arranged on the top surface of the buoyancy tank body along the left-right direction; along the end to end direction, first winch with the second winch is misplaced, first winch is relative the second winch is closer to the crane, the davit can erect in first winch.

Optionally, the top surface of flotation tank body still is provided with life saving equipment, life saving equipment with the crane control set up side by side in the afterbody of flotation tank body, just life saving equipment with first winch is located same one side.

Optionally, the cable guiding column comprises a first cable guiding column, the first cable guiding column is arranged at a position between the second winch and the crane, and the cable outlet of the second winch can bypass the crane through the steering of the first cable guiding column and then extend to the cable guiding hole positioned at the tail part of the buoyancy tank body.

Optionally, the cable guiding column further comprises a second cable guiding column, the second cable guiding column is arranged on one side, close to the head of the buoyancy tank body, of the second winch, and the cable outlet of the second winch can extend to the cable guiding holes on the left side and the right side of the buoyancy tank body through steering of the second cable guiding column.

Optionally, the cable guiding column further comprises a third cable guiding column, the third cable guiding column is arranged on one side, close to the head part of the buoyancy tank body, of the first winch, and the cable outlet of the first winch can extend to the cable guiding holes on the left side and the right side of the buoyancy tank body through steering of the third cable guiding column.

Optionally, the crane is detachably mounted on the buoyancy tank body to realize the transfer of the crane on different buoyancy tank bodies; the floating box body on which the crane is not mounted is detachably provided with a bracket, the bracket can support the suspension arms of other cranes on the floating box body, and the height of the suspension arm supported by the bracket is lower than that of a gantry crane on a ship deck, so that the crane can smoothly pass below the gantry crane.

Optionally, the front side of flotation tank body is provided with the position recess of keeping away that extends along vertical direction, be provided with the cat ladder in the position recess of keeping away.

In another aspect, a semi-submersible vessel is provided, comprising a vessel body and two semi-submersible vessel buoyancy tanks described above, wherein the semi-submersible vessel buoyancy tanks are movably mounted on the vessel body.

The beneficial effects of the application are as follows: the application provides a semi-submersible pontoon and a semi-submersible vessel, wherein a winch and a crane are arranged in a space on the top surface of a pontoon body, so that assistance can be provided for port entering mooring of a vessel and cargo management traction during cargo loading through the winch, and cargo can be lifted through the crane in an auxiliary manner; therefore, the scheme enriches the use functions of the semi-submersible vessel, and when the floating box body prevents the vessel from mooring or tallying and rope-moving, the hauling rope provided by the winch at the top of the floating box body can be directly used for mooring or tallying, so that the problem that the floating box prevents the vessel from mooring or tallying is solved. In addition, in order to enable the cable outlet of the winch to be smoothly led out from the cable guiding holes around the buoyancy tank body, the cable guiding columns are further arranged on the top surface of the buoyancy tank body, the cable outlet of the winch can be enabled to avoid a crane through the guiding of the cable guiding columns, and the problem that the crane interferes with the cable outlet is solved.

Drawings

The application is described in further detail below with reference to the drawings and examples.

FIG. 1 is a top layout view of a semi-submersible pontoon according to an embodiment of the application in a crane-mounted condition;

FIG. 2 is a top layout view of a semi-submersible pontoon according to an embodiment of the application in a carrier-mounted condition;

fig. 3 is a top layout view of the combined state of the two semi-submersible vessels according to the embodiment of the application.

In the figure:

1. a buoyancy tank body; 11. a clearance groove; 21. a first winch; 22. a second winch; 3. a crane; 31. a suspension arm; 4. a cable guide hole; 51. a first guide post; 52. a second guide post; 53. a third guide post; 6. a lifesaving device; 7. a ladder stand; 8. and a bracket.

Detailed Description

In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application are described in further detail below, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The existing buoyancy tanks on the semi-submersible vessel have single use function, and only have the function of adjusting the balance of the vessel through dead weight, and in some cases, the existence of the buoyancy tanks can prevent the vessel from mooring after entering ports or prevent the vessel from being tidied when loading cargoes.

In order to overcome the above defects, as shown in fig. 1, the embodiment provides a semi-submersible pontoon, which comprises a pontoon body 1, and a winch and a crane 3 arranged on the top surface of the pontoon body 1, wherein the periphery of the top surface of the pontoon body 1 is provided with a cable guiding hole 4, the top surface of the pontoon body 1 is also provided with a cable guiding column, and a cable can be led out of the winch to bypass the crane 3 and extend to the cable guiding hole 4 through the steering cable guiding of the cable guiding column.

Specifically, in order to fix equipment such as a winch and a crane 3 on the top surface of the buoyancy tank body 1, a plurality of foundation bolts can be arranged on the top surface of the buoyancy tank body 1, and the foundation bolts penetrate through the bases of the winch and the crane 3 and are fixed by locking nuts during installation. The winch and the crane 3 can be detachably mounted on the top surface of the buoyancy tank body 1. For further reinforcement, the base of the winch or crane 3 may be welded to the buoyancy tank body 1.

When in offshore mooring, a mooring rope of a winch on the floating box body 1 can be led to the shore to be fastened on the shore for mooring; when loading goods, the rope of the winch on the buoyancy tank body 1 can be fastened to the goods, and the goods are pulled to be tidied by the traction force of the winch. Based on the support of the buoyancy tank body 1, the crane 3 is located at a higher position, and can hoist and arrange cargoes.

According to the scheme, the cable guiding holes 4 are formed in the periphery of the buoyancy tank body 1, a proper cable guiding hole 4 is selected to guide cables according to the position relation between a fastening point (namely a fastening point on a shore or a fastening point on a cargo) and a winch, specifically, when the fastening point is located on the front side of the winch, the cables of the winch are guided out from the cable guiding holes 4 in the head of the buoyancy tank body 1, when the fastening point is located on the rear side of the winch, the cables of the winch are guided out from the cable guiding holes 4 in the tail of the buoyancy tank body 1, when the fastening point is located on the left side of the winch, the cables of the winch are guided out from the cable guiding holes 4 in the left side of the buoyancy tank body 1, and when the fastening point is located on the right side of the winch, the cables of the winch are guided out from the cable guiding holes 4 in the right side of the buoyancy tank body 1. The cable guiding hole 4 is arranged in the scheme, so that the cable of the winch can be guided, and the problem of cable abrasion caused by the corner friction between the cable and the buoyancy tank body 1 can be avoided.

Because the setting of crane 3 can occupy the partial space of buoyancy tank body 1 top surface, referring to fig. 1, when the winch goes out the cable to the afterbody, the cable that directly draws forth from the winch can form the interference with crane 3 before reaching the cable guiding hole 4 of afterbody, so this scheme has set up the cable guiding post, and the cable guiding post can turn to, avoids the cable to directly interfere the problem of crane 3, realizes that the winch can go out the purpose of cable smoothly from all directions. It will be appreciated that not all directional cable exits need be diverted through the guide post, but only in the case where some of them need to avoid obstacles, the cable needs to be diverted around the guide post, and in the case where straight out can pass through the guide hole 4 for that, the cable does not need to be diverted around the guide post.

In summary, in the semi-submersible floating box of the embodiment, the winch and the crane 3 are arranged in the space on the top surface of the floating box body 1, so that assistance can be provided for port entering mooring of a ship and cargo handling traction during cargo loading through the winch, and cargo can be lifted through the crane 3 in an auxiliary manner; therefore, the scheme enriches the use functions of the semi-submersible vessel, and when the floating box body 1 prevents the vessel from mooring or tallying and rope-moving, the hauling rope provided by the winch at the top of the floating box body can be directly used for mooring or tallying, so that the problem that the floating box prevents the vessel from mooring or tallying is solved. Moreover, in order to make the cable that goes out of winch can follow the cable guiding hole 4 around the buoyancy tank body 1 smoothly draw forth, this scheme has still set up the guide post at the top surface of buoyancy tank body 1, can make the cable that goes out of winch avoid crane 3 through the direction of guide post, solves the problem that crane 3 interfered the cable.

In an embodiment, referring to fig. 1, in the head-tail direction, the crane 3 is disposed at the tail of the buoyancy tank body 1, and the winch is disposed at the middle of the buoyancy tank body 1, so that the boom 31 of the crane 3 can be erected on the winch, and the boom 31 is supported by the winch.

Specifically, the winch is arranged in the middle of the buoyancy tank body 1, so that the winch can conveniently and sequentially go out of the cable forwards. The crane 3 is in the use of not using, the davit 31 does not possess locking force, need set up the support and support, this scheme sets up crane 3 in the afterbody of buoyancy tank body 1, when idle, crane 3's davit 31 can erect to the winch just, the winch has acted as the effect of the support of supporting davit 31 promptly this moment, so need not to consider again and set up the support that is used for supporting davit 31 alone on buoyancy tank body 1, both simplified the structure, the cost is reduced, can avoid again because the setting of support causes the problem of interference to the cable of going out of winch.

In one embodiment, the winch comprises a first winch 21 and a second winch 22, and the first winch 21 and the second winch 22 are arranged on the top surface of the buoyancy tank body 1 along the left and right Fang Xiangbu; in the head-to-tail direction, the first winch 21 and the second winch 22 are arranged in a staggered manner, the first winch 21 is closer to the crane 3 than the second winch 22, and the suspension arm 31 can be erected on the first winch 21.

Providing the first winch 21 and the second winch 22 from side to side can provide two pulling ropes to meet more use requirements, for example, when loading on shore, the rope provided by the winch close to the side of the shore can be tied to the auxiliary mooring on the shore, and the rope provided by the other winch can assist in the management. In this scheme, because buoyancy tank body 1 top surface width space is limited, so with first winch 21 and second winch 22 along the head and the tail direction staggered arrangement, can avoid producing the interference between first winch 21 and the second winch 22, still can reserve the clearance between first winch 21 and second winch 22 simultaneously for the crewman passes.

In an embodiment, the top surface of the buoyancy tank body 1 is further provided with a lifesaving device 6, the lifesaving device 6 and the crane 3 are arranged at the tail of the buoyancy tank body 1 side by side, and the lifesaving device 6 and the first winch 21 are located at the same side.

The life-saving device 6 can be a life-saving boat, a life raft and the like, the life-saving device 6 is fixed by utilizing the corner surrounded by the crane 3 and the first winch 21 on the buoyancy tank body 1, the space on the top surface of the buoyancy tank body 1 can be recycled, and the cable outlet of the winch can be prevented. The life-saving device 6 is fixed on the buoyancy tank body 1, so that the space on the deck of the ship, which is originally used for fixing the life-saving device 6, can be vacated, and the loading of cargoes is facilitated.

In an embodiment, the cable guiding column includes a first cable guiding column 51, the first cable guiding column 51 is disposed at a position between the second winch 22 and the crane 3, and the cable outgoing from the second winch 22 may bypass the crane 3 through the steering of the first cable guiding column 51 and then extend to the cable guiding hole 4 located at the tail of the buoyancy tank body 1.

Specifically, when the second winch 22 goes out of the cable backwards, the cable is easy to interfere with the crane 3, so that the first cable guide post 51 is arranged at the position between the second winch 22 and the crane 3, and when the cable goes out of the cable, the cable bypasses one side, close to the crane 3, of the first cable guide post 51, so that the cable can turn in a direction away from the crane 3, and further, the cable can avoid the crane 3, and the purpose of avoiding interference between the cable and the crane 3 is achieved.

In an embodiment, the cable guiding column further includes a second cable guiding column 52, the second cable guiding column 52 is disposed on a side of the second winch 22 near the head of the buoyancy tank body 1, and the outgoing cable of the second winch 22 may extend to the cable guiding holes 4 located on the left and right sides of the buoyancy tank body 1 through the steering of the second cable guiding column 52.

Specifically, the cable-out direction of the second winch 22 is front-back cable-out, if the cable passes through the cable-guiding holes 4 on the left side and the right side after being directly cable-out, the cable will easily interfere with the baffles on the two sides of the second winch 22, so the second cable-guiding column 52 is arranged on one side of the second winch 22, which is close to the head of the buoyancy tank 1, based on the steering of the second cable-guiding column 52, the cable can be made to extend forwards for a certain distance and then transversely extend to the cable-guiding holes 4 on the side, and the problem that the cable interferes with the baffles on the two sides of the second winch 22 can be avoided.

In an embodiment, the cable guiding column further includes a third cable guiding column 53, the third cable guiding column 53 is disposed on a side of the first winch 21 near the head of the buoyancy tank body 1, and the cable of the first winch 21 may extend to the cable guiding holes 4 located on the left and right sides of the buoyancy tank body 1 through the steering of the third cable guiding column 53.

Similarly, the arrangement of the third guide posts 53 can avoid the problem that the cable of the first winch 21 interferes with the baffles on both sides of the first winch 21 itself.

In one embodiment, the crane 3 is detachably mounted on the buoyancy tank body 1, so as to realize the transfer of the crane 3 on different buoyancy tank bodies 1; the bracket 8 is detachably mounted on the buoyancy tank body 1 without the crane 3, the bracket 8 can support the suspension arms 31 of the other cranes 3 on the buoyancy tank body 1, and the height of the suspension arms 31 supported by the bracket 8 is lower than the height of the gantry crane on the deck of the ship, so that the cranes 3 can smoothly pass under the gantry crane.

Generally install two semi-submerged ship buoyancy tanks on a semi-submerged ship, this scheme is with crane 3 demountable installation on buoyancy tank body 1, can realize two buoyancy tank bodies 1 sharing a crane 3, reaches the effect of reduction in equipment cost, and specifically, can install crane 3 to wherein on any one buoyancy tank body 1 according to the user demand.

The deck of the semi-submersible vessel is provided with the guide rail, the semi-submersible vessel buoyancy tank is arranged above the guide rail, and when the semi-submersible vessel buoyancy tank is moved, the buoyancy tank can be moved longitudinally (namely the head-tail direction of the vessel) or transversely (namely the left-right direction of the vessel) along the guide rail so as to adjust the position of the semi-submersible vessel buoyancy tank. The deck is provided with a longitudinal guide rail extending longitudinally and a plurality of transverse guide rails extending transversely, when the deck is used, two semi-submersible pontoons are positioned at the bow, the midship or the stern at the same time, so when the positions of the semi-submersible pontoons are adjusted, the two semi-submersible pontoons are combined together (namely, the state shown in fig. 3) and then slide along the longitudinal guide rails at the same time, and after reaching a preset position, the two semi-submersible pontoons are separated along the transverse guide rails and slide to the preset position. A gantry crane for hoisting goods is also generally arranged on the deck, and the semi-submersible pontoon may need to pass under the gantry crane in the process of moving along the longitudinal guide rail, so that the top end of the semi-submersible pontoon needs to be ensured to be lower than the height of the cross beam of the gantry crane during passing.

In this embodiment scheme, when using alone, directly utilize hoist to support the davit 31 of crane 3, because hoist self size is big, high for the high height on davit 31 top under the support of hoist is higher, easily interferes with the crossbeam of portal crane, so this scheme has installed the bracket 8 that can support davit 31 at the top of another buoyancy tank body 1, and the height of bracket 8 is less than the height of hoist, so can reduce the height on davit 31 top after the support, when making buoyancy tank body 1 pass through from the below of portal crane, davit 31 top can not interfere with the crossbeam of portal crane.

It should be noted that, according to the scheme of the present embodiment, when the buoyancy tank body 1 with the crane 3 needs to pass under the gantry crane, the boom 31 needs to be combined with another buoyancy tank body 1, and then transferred and erected onto the bracket 8 of the other buoyancy tank body 1, and then the two buoyancy tank bodies 1 are simultaneously moved; after the gantry crane, the two buoyancy tank bodies 1 can be separated and respectively moved to a preset position.

In an embodiment, a position avoidance groove 11 extending along the vertical direction is arranged on the front side of the buoyancy tank body 1, and a ladder stand 7 is arranged in the position avoidance groove 11.

The setting cat ladder 7 can supply the crewman to climb up the top of buoyancy tank body 1 and use, sets up in the front side of buoyancy tank body and keeps away position recess 11, can avoid the cat ladder 7 that sets up to expose, and then avoids the cat ladder 7 to collide with other structures on the hull.

In another aspect, a semi-submersible vessel is provided, comprising a vessel body and two semi-submersible vessel buoyancy tanks described above, wherein the semi-submersible vessel buoyancy tanks are movably mounted on the vessel body.

In the semi-submersible of this embodiment, the top of two semi-submersible pontoons is provided with two winches respectively, and one of them semi-submersible pontoon's top is provided with crane 3, and another is provided with bracket 8, and when two semi-submersible pontoons were used in combination, crane 3 can erect on bracket 8 to reduce the height on crane 3 top, and then reach the purpose of dodging the portal crane.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are merely for convenience of description and to simplify the operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present application is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the application and should not be taken in any way as limiting the scope of the application. Other embodiments of the application will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (10)

1. The utility model provides a semi-submerged ship buoyancy tank, its characterized in that, including buoyancy tank body (1) and set up in winch and crane (3) of the top surface of buoyancy tank body (1), be provided with cable guide hole (4) around the top surface of buoyancy tank body (1), the top surface of buoyancy tank body (1) still is provided with the guide post, through the steering cable guide of guide post, makes the cable of going out of winch can walk around crane (3) extends to again cable guide hole (4).

2. Semi-submersible buoyancy tank according to claim 1, characterized in that the crane (3) is arranged in the tail of the buoyancy tank body (1) in the head-to-tail direction, the winch is arranged in the middle of the buoyancy tank body (1) such that the boom (31) of the crane (3) can be erected onto the winch, by means of which the boom (31) is supported.

3. Semi-submersible buoyancy tank according to claim 2, characterized in that the winch comprises a first winch (21) and a second winch (22), the first winch (21) and the second winch (22) being arranged in the left-right direction on the top surface of the buoyancy tank body (1); along the end-to-end direction, first winch (21) with second winch (22) are staggered, first winch (21) is relatively second winch (22) is closer to crane (3), davit (31) can erect in first winch (21).

4. A semi-submersible vessel buoyancy tank as claimed in claim 3, wherein the top surface of the buoyancy tank body (1) is further provided with a lifesaving device (6), the lifesaving device (6) and the crane (3) are arranged at the tail of the buoyancy tank body (1) side by side, and the lifesaving device (6) and the first winch (21) are located at the same side.

5. A semi-submersible buoyancy tank according to claim 3, wherein the mooring post comprises a first mooring post (51), the first mooring post (51) being arranged in a position between the second winch (22) and the crane (3), the outgoing cable of the second winch (22) being able to bypass the crane (3) by means of the turning of the first mooring post (51) and then being extended to the mooring hole (4) at the tail of the buoyancy tank body (1).

6. The semi-submersible buoyancy tank according to claim 5, wherein the mooring post further comprises a second mooring post (52), the second mooring post (52) is arranged at one side of the second winch (22) near the head of the buoyancy tank body (1), and the outgoing cable of the second winch (22) can extend to the mooring holes (4) at the left and right sides of the buoyancy tank body (1) through the steering of the second mooring post (52).

7. The semi-submersible vessel buoyancy tank according to claim 5, wherein the mooring post further comprises a third mooring post (53), the third mooring post (53) is arranged at one side of the first winch (21) close to the head of the buoyancy tank body (1), and the outgoing line of the first winch (21) can extend to the mooring holes (4) at the left and right sides of the buoyancy tank body (1) through the steering of the third mooring post (53).

8. Semi-submersible buoyancy tank according to claim 2, characterized in that the crane (3) is detachably mounted on the buoyancy tank body (1) for effecting transfer of the crane (3) on different buoyancy tank bodies (1); the floating box body (1) without the crane (3) is detachably provided with a bracket (8), the bracket (8) can support the suspension arms (31) of the crane (3) on other floating box bodies (1), and the height of the suspension arms (31) supported by the bracket (8) is lower than that of a gantry crane on a ship deck, so that the crane (3) can smoothly pass below the gantry crane.

9. The semi-submersible pontoon according to claim 1, wherein the pontoon body (1) is provided at a front side thereof with a clearance groove (11) extending in a vertical direction, and a ladder (7) is provided in the clearance groove (11).

10. A semi-submersible vessel comprising a vessel body and two semi-submersible pontoons according to any one of claims 1-9, said pontoons being movably mounted to said vessel body.