CN116331415A - Ship moon pool mechanism with double-pulley system - Google Patents

Abstract

The invention discloses a ship moon pool mechanism with a double-pulley system, which comprises a moon pool channel and a moon pool ceiling positioned above the moon pool channel, wherein a first sliding rail and a second sliding rail are arranged on the inner wall of the moon pool channel, a first pulley is arranged on the first sliding rail, and a second pulley is arranged on the second sliding rail; and a lifting device connected with the first pulley and the second pulley is arranged on the moon pool ceiling, and either one of the first pulley and the second pulley is dragged by the lifting device to independently lift or synchronously lift. The moon pool mechanism of this scheme can adapt to multiple handling demand, can be applicable to more service scenario. In addition, since the two sets of pulley systems are arranged in the scheme, when one pulley system fails, the other pulley system can be used, so that the function of mutual standby between the two pulley systems is realized.

Description

Ship moon pool mechanism with double-pulley system

Technical Field

The application relates to the technical field of ships, in particular to a ship moon pool mechanism with a double-pulley system.

Background

The moon pool of the ship is mainly applied to the field of ocean engineering, is a structural object which is communicated from the water surface to the water body and penetrates through the floating body structure, is generally called, penetrates through all layers of decks, is communicated with seawater, and creates a stable small environment in a severe ocean environment compared with the surrounding environment of the floating body. The scientific investigation equipment or other underwater equipment can be conveyed to below sea level by avoiding sea waves or ice layers through a set of pulley systems arranged on the moon pool so as to realize various operation functions of the equipment under water.

The traditional moon pool is only provided with one set of pulleys, and only one device can be simultaneously retracted and extended, and if two devices are required to be simultaneously deployed or recycled in the moon pool, the one set of pulleys of the traditional moon pool cannot cope with the situation, so that the use function of the traditional ship moon pool has a larger limitation.

Disclosure of Invention

The aim of the embodiment of the invention is that: there is provided a ship moon pool mechanism with a double block system, which can solve the above-mentioned problems existing in the prior art.

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

the ship moon pool mechanism with the double-pulley system comprises a moon pool channel and a moon pool ceiling positioned above the moon pool channel, wherein a first sliding rail and a second sliding rail are arranged on the inner wall of the moon pool channel, a first pulley is arranged on the first sliding rail, and a second pulley is arranged on the second sliding rail; and a lifting device connected with the first pulley and the second pulley is arranged on the moon pool ceiling, and either one of the first pulley and the second pulley is dragged by the lifting device to independently lift or synchronously lift.

Optionally, the lifting device comprises a first winch and a second winch, the first winch is connected with the first pulley through a first cable, and the second winch is connected with the second pulley through a second cable.

Optionally, the overhead hoist includes a winch and assembly pulley, the assembly pulley include fixed mounting in first movable pulley on the first coaster and fixed mounting in second movable pulley on the second coaster, the hawser one end is fixed in moon pool ceiling, the other end is walked around first movable pulley and second movable pulley and with the winch is connected, through control first movable pulley and the running stop state of second movable pulley, realizes controlling first coaster and either independent lift or both synchronous lifts of second coaster.

Optionally, a first brake device is arranged on the first pulley, a second brake device is arranged on the second pulley, and the running stop states of the first pulley and the second pulley are respectively controlled by controlling the first brake device and the second brake device, so that the running stop states of the first movable pulley and the second movable pulley are controlled.

Optionally, the pulley block further comprises a first fixed pulley, a second fixed pulley and a third movable pulley, the first fixed pulley and the second fixed pulley are respectively fixed on the moon pool ceiling, the third movable pulley is connected with the first pulley or the second pulley, and the cable sequentially bypasses the first movable pulley, the first fixed pulley, the third movable pulley, the second fixed pulley and the second movable pulley.

Optionally, the third movable pulley is connected with the connecting rod, the first pulley is provided with a first connecting seat, the second pulley is provided with a second connecting seat, and the first connecting seat and the second connecting seat can be detachably connected with the connecting rod respectively.

Optionally, a first guide wheel is fixed on one side of the first pulley close to the second pulley, a second guide wheel is fixed on one side of the second pulley close to the first pulley, and when the third movable pulley is located below the first pulley, the first guide wheel supports the cable to avoid interference of the first pulley with the cable; when the third movable sheave is positioned below the second sheave, the second guide pulley supports the cable to avoid interference of the second sheave with the cable.

Optionally, a third connecting seat is arranged between the first fixed pulley and the second fixed pulley on the moon pool ceiling, and the third connecting seat can be detachably connected with the connecting rod.

Optionally, the pulley block further comprises a third fixed pulley, the third fixed pulley is arranged between the winch and the second fixed pulley, and after the cable bypasses the second movable pulley, the cable bypasses the third fixed pulley and is connected with the winch.

Optionally, the device further comprises a docking member, wherein the first pulley and the second pulley are simultaneously connected through the docking member, so that synchronism of lifting movement of the first pulley and the second pulley is controlled.

The beneficial effects of this application are: the invention provides a ship moon pool mechanism with a double-pulley system, wherein two sets of pulley systems are arranged on the inner wall of a moon pool channel, and the lifting of the two sets of pulleys can be independently controlled; when two sets of equipment are required to be lifted simultaneously or the size of the equipment required to be lifted is large, the first pulley and the second pulley can be started simultaneously, the two sets of equipment are respectively installed under the first pulley and the second pulley, or the large-size equipment is connected with the first pulley and the second pulley simultaneously, and the two pulleys are driven to lift simultaneously for lifting, so that the lifting stability is improved. Therefore, the moon pool mechanism of the scheme can adapt to various lifting demands and can be suitable for more use scenes. In addition, since the two sets of pulley systems are arranged in the scheme, when one pulley system fails, the other pulley system can be used, so that the function of mutual standby between the two pulley systems is realized.

Drawings

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

Fig. 1 is a schematic structural view of one implementation of a marine moon pool mechanism with a double block system according to an embodiment of the present application;

FIG. 2 is a schematic view of another embodiment of a marine moon pool mechanism with a dual sled system according to the present embodiments;

FIG. 3 is a schematic view of the structure of FIG. 2 in which the first and second pulleys are simultaneously activated;

FIG. 4 is a schematic view of the structure of FIG. 2 in which the first sled is used when the first sled is activated alone;

fig. 5 is a schematic view of the structure of fig. 2 in another use state when the first pulley is independently activated.

In the figure:

11. a moon pool channel; 12. moon pool ceiling; 21. a first slide rail; 22. a first sled; 31. a second slide rail; 32. a second sled; 41. a first winch; 42. a second winch; 43. a winch; 5. pulley block; 51. a first movable pulley; 52. a second movable pulley; 53. a third movable pulley; 531. a connecting rod; 54. a first fixed pulley; 55. a second fixed pulley; 56. a third fixed pulley; 57. the first guide wheel; 58. the second guide wheel; 59. a cable; 6. an apparatus.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present application 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 herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "secured" and "fixed" are to be construed broadly, as for example, they may be fixedly connected, detachably connected, or integrated; 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 invention will be understood in specific cases by those of ordinary skill in the art.

In this 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, and may also include the first and second features not being in direct contact but being in contact with each other by way of 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.

As shown in fig. 1 to 5, the present embodiment provides a ship moon pool mechanism with a double-pulley system, which comprises a moon pool channel 11 and a moon pool ceiling 12 located above the moon pool channel 11, wherein a first sliding rail 21 and a second sliding rail 31 are arranged on the inner wall of the moon pool channel 11, a first pulley 22 is installed on the first sliding rail 21, and a second pulley 32 is installed on the second sliding rail 31; the moon pool ceiling 12 is provided with a lifting device connected with the first pulley 22 and the second pulley 32, and either one of the first pulley 22 and the second pulley 32 is pulled to independently lift or lift synchronously through the lifting device.

The first sliding rail 21 can guide the first pulley 22 to linearly lift, and the second sliding rail 31 can guide the second pulley 32 to linearly lift, so as to ensure the stability of the lifting process of the first pulley 22 and the second pulley 32.

The lifting device can drag either the first pulley 22 or the second pulley 32 to lift independently or both of them to lift synchronously, which means that the lifting of the first pulley 22 and the second pulley 32 can be controlled independently, and when necessary, one of the first pulley 22 and the second pulley 32 can be started independently to work, or the first pulley 22 and the second pulley 32 can be started simultaneously to work cooperatively.

In the scheme of the embodiment, two sets of pulley systems are arranged on the inner wall of the moon pool channel 11, and the lifting of the two sets of pulleys can be controlled independently, when only one set of equipment 6 is needed to be lifted, the equipment 6 can be arranged under the first pulley 22 or the second pulley 32, and only one pulley is driven to lift for lifting, so that the energy consumption is reduced; when two sets of equipment 6 need to be lifted at the same time, the first pulley 22 and the second pulley 32 can be started at the same time, and the two sets of equipment 6 are respectively arranged below the first pulley 22 and the second pulley 32 to realize the lifting at the same time; or when the size of the equipment 6 to be lifted is larger, the large-size equipment 6 can be connected with the first pulley 22 and the second pulley 32 simultaneously, and the two pulleys are driven to lift and lift simultaneously, so that the lifting capacity is improved, and meanwhile, the lifting stability is improved. From the above, the double block system of the present embodiment can deploy and retrieve heavier equipment, such as 10t for a single block, and (10+10) x 0.8=16t for a double block.

Therefore, the moon pool mechanism of the scheme can adapt to various lifting demands and can be suitable for more use scenes. In addition, since the two sets of pulley systems are arranged in the scheme, when one pulley system fails, the other pulley system can be used, so that the function of mutual standby between the two pulley systems is realized.

To achieve independent control of the first trolley 22 and the second trolley 32, in one embodiment, referring to fig. 1, the trolley comprises a first winch 41 and a second winch 42, the first winch 41 being connected to the first trolley 22 by a first cable, the second winch 42 being connected to the second trolley 32 by a second cable.

In this way, the first winch 41 and the second winch 42 are independently provided for the first pulley 22 and the second pulley 32, respectively, and when the first pulley 22 is used alone, the first winch 41 is started alone; when the second trolley 32 is used alone, the second winch 42 is started alone; when both are used simultaneously, the first winch 41 and the second winch 42 are started simultaneously. This solution provides for the first winch 41 and the second winch 42 to be mutually redundant, one of which can be activated when the other fails, so as to maintain the normal functioning.

To achieve independent control of the first trolley 22 and the second trolley 32, in one embodiment, referring to fig. 2-5, the lifting device comprises a winch 43 and a pulley block 5, the pulley block 5 comprises a first movable pulley 51 fixedly mounted on the first trolley 22 and a second movable pulley 52 fixedly mounted on the second trolley 32, one end of a cable 59 is fixed on the moon pool ceiling 12, the other end of the cable bypasses the first movable pulley 51 and the second movable pulley 52 and is connected with the winch 43, and by controlling the running state of the first movable pulley 51 and the second movable pulley 52, independent lifting or synchronous lifting of either one of the first trolley 22 and the second trolley 32 is achieved.

The running state of the first movable pulley 51 and the second movable pulley 52 specifically includes a sliding state and a locking state, and in the sliding state, when the cable 59 is loosened, the first movable pulley 51 or the second movable pulley 52 is driven to slide downwards under the gravity action of the first pulley 22 or the second pulley 32; in the locked state, the first 22 or second 32 sled can only remain stationary even if the cable 59 is loosened.

Therefore, when the first pulley 22 is used alone, the first movable pulley 51 is released to be in a sliding state, the second movable pulley 52 is locked to be in a locking state, and the winch 43 pulls the first pulley 22 to lift and lower alone when the cable 59 is hoisted; conversely, when the second pulley 32 is used alone, the second movable pulley 52 is released to be in a sliding state, the first movable pulley 51 is locked to be in a locking state, and the winch 43 pulls the second pulley 32 to lift alone when winding the cable 59; when the first pulley 22 and the second pulley 32 are used at the same time, the first movable pulley 51 and the second movable pulley 52 may be released at the same time.

The pulley block 5 is adopted to wind the cable 59, so that the first pulley 22 and the second pulley 32 are independently controlled under the condition of using one winch 43, the use function is ensured, and the equipment cost of the lifting device is effectively reduced.

Meanwhile, the first pulley 22 and the second pulley 32 are respectively provided with the first movable pulley 51 and the second movable pulley 52, the tension of the cable 59 can be reduced by times by utilizing the structure of the movable pulleys, the load of the winch 43 is reduced, and the working stability of the winch 43 is ensured.

In order to control the running states of the first movable pulley 51 and the second movable pulley 52, in one embodiment, a first braking device is disposed on the first pulley 22, a second braking device is disposed on the second pulley 32, and by controlling the first braking device and the second braking device, the running states of the first pulley 22 and the second pulley 32 are respectively controlled, and further the running states of the first movable pulley 51 and the second movable pulley 52 are controlled.

That is, when the first pulley 22 is not used, the first brake device is directly braked, and the first pulley 22 is locked on the first slide rail 21, so that the first movable pulley 51 mounted on the first pulley 22 can be fixed; when the second pulley 32 is not used, the second brake device is directly braked, the second pulley 32 is locked on the second slide rail 31, and the second movable pulley 52 arranged on the second pulley 32 can be fixed. This solution will directly lock the trolley by means of the brake device provided on the trolley, which ensures the reliability of the fixing of the first trolley 22 and the second trolley 32 in the locked state.

The first braking device and the second braking device have the function of locking the pulley on the sliding rail, and a person skilled in the art can directly apply the braking structure on the existing sliding device to the scheme.

Regarding the pulley block 5, in one embodiment, the pulley block 5 further includes a first fixed pulley 54, a second fixed pulley 55, and a third fixed pulley 53, where the first fixed pulley 54 and the second fixed pulley 55 are fixed to the moon pool ceiling 12, respectively, the third fixed pulley 53 is connected to the first pulley 22 or the second pulley 32, and the cable 59 sequentially passes around the first fixed pulley 51, the first fixed pulley 54, the third fixed pulley 53, the second fixed pulley 55, and the second movable pulley 52.

The third movable pulley 53 is provided between the first movable pulley 51 and the second movable pulley 52, so that the tension of the cable 59 can be further reduced, and the load of the winch 43 can be reduced.

Specifically, when the third movable pulley 53 is connected with the first pulley 22, and the first pulley 22 is started, the third movable pulley 53 follows the first pulley 22 to move up and down, and the first pulley 22 is provided with the first movable pulley 51 and the third movable pulley 53, and the tension of the cable 59 on the first pulley 22 is 1/4 of the sum of the weights of the first pulley 22 and the equipment 6 loaded on the cable 59; similarly, when the third movable pulley 53 is connected to the second pulley 32, and the second pulley 32 is activated, the third movable pulley 53 follows the second pulley 32 to move up and down, and the second pulley 32 has the second movable pulley 52 and the third movable pulley 53 thereon, and the pulling force of the cable 59 on the second pulley 32 is 1/4 of the sum of the weights of the second pulley 32 and the equipment 6 loaded thereon.

In order to connect the third movable pulley 53 with the first pulley 22 or the second pulley 32, in an embodiment, the third movable pulley 53 is connected with the connecting rod 531, the first pulley 22 is provided with a first connecting seat, the second pulley 32 is provided with a second connecting seat, and the first connecting seat and the second connecting seat are respectively detachably connected with the connecting rod 531.

Then, only one third movable pulley 53 is required to be separately arranged, and the connecting rod 531 can be connected to the first connecting seat or the second connecting seat at will according to the requirement of use, so as to achieve the purpose that the first pulley 22 and the second pulley 32 share one third movable pulley 53. Therefore, the structure of the pulley block 5 is simplified, and the device cost is reduced.

Regarding the detachable connection of the connecting rod 531 with the first connecting seat and the second connecting seat, optionally, one end of the connecting rod 531 far away from the third movable pulley 53 is provided with a first connecting hole, the first connecting seat and the second connecting seat are respectively provided with a second connecting hole, and the connecting rod 531 can be detachably connected with the first connecting seat and the second connecting seat by penetrating a bolt through the first connecting hole and the second connecting hole and then connecting with a nut.

Regarding the structure of the third movable pulley 53, in one embodiment, the third movable pulley 53 includes a roller and two support plates respectively disposed at two sides of the roller, the two support plates are connected by a support shaft, and the roller is rotatably mounted on the support shaft; each support plate is connected with one connecting rod 531 respectively.

During installation, the two connecting rods 531 are simultaneously connected with the first connecting seat or are simultaneously connected with the second connecting seat.

In use, the first 22 and second 32 pulleys need to be locked prior to releasing the connecting rod 531 to avoid loosening of the cable 59 after releasing the connecting rod 531, resulting in the first 22 or second 32 pulley falling.

Further, a first guide wheel 57 is fixed to a side of the first pulley 22 close to the second pulley 32, a second guide wheel 58 is fixed to a side of the second pulley 32 close to the first pulley 22, and when the third movable pulley 53 is located below the first pulley 22, the first guide wheel 57 supports the cable 59 to avoid the first pulley 22 interfering with the cable 59; when the third traveling block 53 is positioned below the second block 32, the second guide pulley 58 supports the cable 59 to avoid interference of the second block 32 with the cable 59.

Specifically, referring to the state shown in fig. 5, when the first pulley 22 is independently activated and the third movable pulley 53 is connected to the first pulley 22, the third movable pulley 53 will lift synchronously with the first pulley 22, and when the third movable pulley 53 moves under the second pulley 32, the cable 59 of the portion between the third movable pulley 53 and the second fixed pulley 55 is too close to the second pulley 32, and there is a risk of interference friction between the cable 59 and the second pulley 32, so the second pulley 32 is provided with the second guide pulley 58, and the second guide pulley 58 can support the portion of the cable 59 away from the second pulley 32, so as to avoid the foregoing problem. The first guide roller 57 is provided for the same purpose as the second guide roller 58, and can be understood in combination.

In an embodiment, a third connecting seat is disposed between the first fixed pulley 54 and the second fixed pulley 55 of the moon pool ceiling 12, and the third connecting seat is detachably connected with the connecting rod 531.

Referring to fig. 2 or 4, when the connecting rod 531 is connected to the third connecting seat, the third movable sheave 53 is used as a fixed sheave, which does not follow the first sheave 22 or the second sheave 32 to be lifted, so that it does not contribute to the effort saving of the pulley block 5.

According to the principle that the useful work of the cable 59 for pulling the first pulley 22 or the second pulley 32 up and down is constant, the third movable pulley 53 used as the fixed pulley does not contribute to the labor saving, and the presence of the third movable pulley 53 at this time does not lengthen the telescopic length of the cable 59. Therefore, when the third movable sheave 53 is used as the fixed sheave, the first sheave 22 or the second sheave 32 is lifted and lowered faster than when the third movable sheave 53 is used as the movable sheave when the rotation speed of the winch 43 is the same.

Based on this, when the weight of the pulled device 6 is large, the connection lever 531 may be connected to the first connection base or the second connection base in order to alleviate the pulling force; when the weight of the towed device 6 is small, the connecting rod 531 may be connected to the third connection seat for speed improvement. That is, in the case where the winch 43 is fixed with rated power, the present embodiment can freely select the connection position of the connection lever 531 according to the weight of the actual equipment 6, and the pulling efficiency is improved as much as possible while taking into consideration sufficient pulling force.

In one embodiment, the pulley block 5 further includes a third fixed pulley 56, the third fixed pulley 56 is disposed between the winch 43 and the second fixed pulley 55, and the cable 59 bypasses the third fixed pulley 56 and is connected to the winch 43 after bypassing the second movable pulley 52.

The third fixed pulley 56 is arranged between the winch 43 and the second fixed pulley 55, so that the cable 59 can be supported and guided, and interference friction between the cable 59 and the second sliding rail 31 is avoided.

In one embodiment, the marine moon pool mechanism with the dual carriage system further comprises a docking member through which the first carriage 22 and the second carriage 32 are to be simultaneously connected, thereby achieving the synchronization of the lifting movements of the first carriage 22 and the second carriage 32.

Specifically, the docking member is a support structure that is detachably mounted, and when two ends of the docking member are respectively connected to the first pulley 22 and the second pulley 32, the first pulley 22 and the second pulley 32 can be lifted integrally. In specific implementation, the abutting member may be a structure including a section bar and a bolt, wherein the two sides of the section bar are respectively provided with a third connecting hole, the first pulley 22 and the second pulley 32 are respectively provided with a fourth connecting hole, and the bolt penetrates through the third connecting hole and the fourth connecting hole and then is connected with the nut, so that the abutting function of the first pulley 22 and the second pulley 32 can be realized.

Based on the arrangement of the docking member, when the first pulley 22 and the second pulley 32 are used simultaneously, the lifting synchronization of the two pulleys can be ensured, and the problem that the two pulleys cannot be lifted synchronously due to different weights of the equipment 6 loaded by the two pulleys is avoided.

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 invention. 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 principles of the present application are described above in connection with specific embodiments. These descriptions are provided only for the purpose of illustrating the principles of the present application and should not be construed as limiting the scope of the present application in any way. Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification without undue burden from the present disclosure.

Claims (10)

1. The ship moon pool mechanism with the double-pulley system is characterized by comprising a moon pool channel (11) and a moon pool ceiling (12) positioned above the moon pool channel (11), wherein a first sliding rail (21) and a second sliding rail (31) are arranged on the inner wall of the moon pool channel (11), a first pulley (22) is arranged on the first sliding rail (21), and a second pulley (32) is arranged on the second sliding rail (31); and a lifting device connected with the first pulley (22) and the second pulley (32) is arranged on the moon pool ceiling (12), and either the first pulley (22) or the second pulley (32) is dragged by the lifting device to independently lift or synchronously lift.

2. The marine moon pool mechanism with dual trolley system according to claim 1, wherein the handling device comprises a first winch (41) and a second winch (42), the first winch (41) being connected to the first trolley (22) by a first cable, the second winch (42) being connected to the second trolley (32) by a second cable.

3. The ship moon pool mechanism with the double pulley system according to claim 1, wherein the hoisting device comprises a winch (43) and a pulley block (5), the pulley block (5) comprises a first movable pulley (51) fixedly installed on the first pulley (22) and a second movable pulley (52) fixedly installed on the second pulley (32), one end of a cable (59) is fixed on the moon pool ceiling (12), the other end of the cable bypasses the first movable pulley (51) and the second movable pulley (52) and is connected with the winch (43), and the independent lifting or the synchronous lifting of either one of the first pulley (22) and the second pulley (32) is controlled by controlling the running state of the first movable pulley (51) and the second movable pulley (52).

4. A marine moon pool mechanism with a double block system according to claim 3, wherein a first brake device is arranged on the first block (22), a second brake device is arranged on the second block (32), and the running stop states of the first block (22) and the second block (32) and further the running stop states of the first movable block (51) and the second movable block (52) are controlled by controlling the first brake device and the second brake device.

5. A marine moon pool mechanism with a double block system according to claim 3, characterised in that the pulley block (5) further comprises a first fixed pulley (54), a second fixed pulley (55) and a third fixed pulley (53), the first fixed pulley (54) and the second fixed pulley (55) being fixed to the moon pool ceiling (12) respectively, the third fixed pulley (53) being connected with the first block (22) or the second block (32), the cable (59) being wound around the first movable pulley (51), the first fixed pulley (54), the third movable pulley (53), the second fixed pulley (55) and the second movable pulley (52) in sequence.

6. The ship moon pool mechanism with the double pulley system according to claim 5, wherein the third movable pulley (53) is connected with a connecting rod (531), the first pulley (22) is provided with a first connecting seat, the second pulley (32) is provided with a second connecting seat, and the first connecting seat and the second connecting seat are respectively detachably connected with the connecting rod (531).

7. The marine moon pool mechanism with dual trolley system according to claim 6, wherein a first guide wheel (57) is fixed to a side of the first trolley (22) close to the second trolley (32), a second guide wheel (58) is fixed to a side of the second trolley (32) close to the first trolley (22), and the first guide wheel (57) supports the cable (59) to avoid the first trolley (22) interfering with the cable (59) when the third movable pulley (53) is located under the first trolley (22); when the third movable sheave (53) is located below the second trolley (32), the second guide wheel (58) supports the cable (59) to avoid interference of the second trolley (32) with the cable (59).

8. The marine moon pool mechanism with double block system according to claim 6, wherein the moon pool ceiling (12) is provided with a third connection seat between the first fixed pulley (54) and the second fixed pulley (55), which third connection seat is detachably connected with the connecting rod (531).

9. The marine moon pool mechanism with double block system according to claim 5, wherein the pulley block (5) further comprises a third fixed pulley (56), the third fixed pulley (56) is arranged between the winch (43) and the second fixed pulley (55), and the cable (59) bypasses the third fixed pulley (56) and is connected with the winch (43) after bypassing the second movable pulley (52).

10. The marine moon pool mechanism with dual trolley system according to claim 1, further comprising a docking member by which the first trolley (22) and the second trolley (32) are to be connected simultaneously, achieving a synchronicity of the lifting movement of the first trolley (22) and the second trolley (32).

Images