Retractable device

Abstract

The utility model discloses retracting and releasing equipment, and belongs to the technical field of marine operation equipment. According to the take-up and pay-off equipment, the passive heave compensation assembly is arranged on the side face of the supporting leg assembly, the two guide pulleys are arranged at the two ends of the passive heave compensation assembly respectively, and therefore a cable extending out of a winch can be sequentially wound around the two guide pulleys. Therefore, when the collecting and releasing device is in a working state on the ship body and the ship body ascends under the action of factors such as wind, waves and flow on the sea surface, the ship body has large inertia, and the collecting and releasing device bears an additional impact load; the tension of the mooring rope is increased to drive the guide pulley connected with the telescopic rod to move in the direction close to the passive heave compensation assembly, the passive heave compensation assembly can absorb movement of the guide pulley, meanwhile, the mooring rope is released, and the effect of compensating rising movement of the ship body is achieved. Therefore, impact on the cross beam and the supporting leg assembly caused by sudden change of tension of the cable can be effectively avoided, and normal operation of the retracting and releasing equipment is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of marine operation equipment, and in particular to a retractable equipment. Background Art

[0002] Marine exploration equipment, such as ROVs or buoys, is heavy and requires deployment and retraction from a vessel. This typically requires a combination of a retraction device and a gantry (e.g., an A-frame), with the buoy suspended by a cable. As a crucial support component, the gantry is crucial for the safe operation of the entire buoy deployment and retraction system.

[0003] However, during the process of deploying and retracting the exploration equipment, the hull is very likely to rise and fall with the waves under severe sea conditions, causing the inertial movement of the deploying and retracting device along with the hull to easily cause adverse impacts on the gantry. Utility Model Content

[0004] The present application provides a retractable device that can solve the problem in the prior art where the inertial motion of the retractable device along with the hull causes adverse impacts on the gantry. The technical solution is as follows:

[0005] In one aspect, a storage device is provided, the storage device comprising:

[0006] transom, passive heave compensation assembly, cable assembly, two guide pulleys, two outrigger assemblies, and two winches;

[0007] The two leg assemblies are respectively fixedly connected to the two ends of the crossbeam;

[0008] The two winches are respectively fixed on the two leg assemblies;

[0009] The passive heave compensation assembly is fixed to the side of the leg assembly and is located between the winch and the crossbeam, and the passive heave compensation assembly has a telescopic rod on the side facing the winch, and the two guide pulleys are respectively connected to the end of the telescopic rod and the bottom of the passive heave compensation assembly;

[0010] The cable assembly includes a pulley block and a cable, at least some of the pulleys in the pulley block are mounted on the crossbeam and the leg assembly;

[0011] The first end of the cable is wound around one of the winches, and the second end of the cable is sequentially passed through the two guide pulleys and the pulley block and then wound around the other winch.

[0012] Optionally, the passive heave compensation assembly includes: a hydraulic cylinder and an accumulator, both of which are fixed to the leg assembly, the hydraulic cylinder and the accumulator are connected, the hydraulic cylinder has a hydraulic rod at one end facing the winch, and the hydraulic rod is the telescopic rod; the two guide pulleys are respectively a first guide pulley and a second guide pulley, the first guide pulley is rotatably connected to the end of the hydraulic rod, and the second guide pulley is rotatably connected to the bottom of the hydraulic cylinder;

[0013] The second end of the cable is passed through the second guide pulley, the first guide pulley and the pulley block in sequence and then wound around another winch.

[0014] Optionally, the first guide pulley has a first winding-in end and a first winding-out end distributed along the circumference of the first guide pulley, and the second guide pulley has a second winding-in end and a second winding-out end distributed along the circumference of the second guide pulley;

[0015] The first winding-in end and the second winding-out end are flush along the extension direction of the hydraulic cylinder, and the first winding-out end and the second winding-in end are flush along the extension direction of the hydraulic cylinder.

[0016] Optionally, the passive heave compensation assembly further comprises: a first pulley support and a second pulley support, the first pulley support being fixedly connected to the end of the hydraulic rod, and the second pulley support being fixedly connected to the bottom of the hydraulic cylinder;

[0017] Wherein, the first guide pulley is rotatably connected to the first pulley support, and the second guide pulley is rotatably connected to the second pulley support.

[0018] Optionally, the first pulley support includes: a first connecting plate and two first side plates, one side of the first connecting plate is fixedly connected to the end of the hydraulic rod, the two first side plates are fixed to the side of the first connecting plate facing away from the hydraulic rod, the two first side plates are arranged opposite to each other and a first mounting groove is defined between the two first side plates, a portion of the first guide pulley is located in the first mounting groove and is rotatably connected to the two first side plates;

[0019] The second pulley support includes: a second connecting plate and two second side plates, one side of the second connecting plate is fixedly connected to the bottom of the hydraulic cylinder, the two second side plates are fixed on the side of the second connecting plate away from the hydraulic cylinder, the two second side plates are arranged opposite to each other and a second mounting groove is provided between the two second side plates, and a portion of the second guide pulley is located in the second mounting groove and is rotatably connected to the two second side plates.

[0020] Optionally, the hydraulic cylinder and the winch are both fixed to a side of the leg assembly away from the crossbeam, and the pulley set includes: two fixed pulleys, three fixed pulleys and two movable pulleys corresponding to the two leg assemblies one by one;

[0021] The fixed pulley is mounted on the corresponding leg assembly and is located on the side of the hydraulic cylinder facing away from the winch;

[0022] The three fixed pulleys are distributed between the two leg assemblies, with one fixed pulley installed on a side of the leg assembly facing the crossbeam, another fixed pulley installed on a side of the other leg assembly facing the crossbeam, and another fixed pulley installed in a central area of ​​the crossbeam;

[0023] One movable pulley is distributed between two adjacent fixed pulleys in a group, and another movable pulley is distributed between two adjacent fixed pulleys in another group.

[0024] Optionally, the hydraulic cylinder is arranged at an angle, and the orthographic projection of the second guide pulley on the target plane does not overlap with the orthographic projection of the fixed pulley on the target plane, and the target plane is the plane where the central axis of the fixed pulley is located.

[0025] Optionally, the side of the leg assembly has two mounting brackets, and the hydraulic cylinder is fastened to the mounting brackets.

[0026] Optionally, there are two groups of the passive heave compensation components, and the two groups of the passive heave compensation components are respectively connected to the two leg assemblies in a one-to-one correspondence.

[0027] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0028] A retractable device may include: a beam, a passive heave compensation assembly, a cable assembly, two guide pulleys, two leg assemblies, and two winches. By disposing a passive heave compensation assembly on the side of the leg assembly and two guide pulleys at each end of the passive heave compensation assembly, the cable extending from the winch can be sequentially wound around the two guide pulleys. Thus, when the retractable device is in operation on a ship's hull, and the hull is subjected to rising motion due to factors such as wind, waves, and currents on the sea surface, the hull has a large inertia, and the retractable device is subjected to additional impact loads. The increased cable tension drives the guide pulley connected to the telescopic rod toward the passive heave compensation assembly, and the passive heave compensation assembly absorbs the movement of the guide pulley. Simultaneously, the cable is released, compensating for the rising motion of the hull. This effectively prevents sudden changes in cable tension from impacting the beam and leg assembly, ensuring the normal operation of the retractable device. If the hull is subjected to the influence of factors such as wind, waves and currents on the sea surface and is subjected to downward movement, the hull has a large inertia and the cable tension is reduced. The passive heave compensation component can drive the guide pulley to move away from the passive heave compensation component through the telescopic rod, thereby compensating for the downward movement of the hull, thereby tightening the cable to restore the tension, and will not cause the undesirable phenomenon of a sudden drop in the cable tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a structural diagram of a retractable device provided in an embodiment of the present application;

[0031] Figure 2 This is a front view of a retractable device provided in an embodiment of the present application;

[0032] Figure 3 is a side view of a retractable device provided in an embodiment of the present application;

[0033] Figure 4 yes Figure 3 A local enlarged schematic diagram at point A;

[0034] Figure 5 This is a partial structural cross-sectional view of a retractable device provided in an embodiment of the present application;

[0035] Figure 6 This is a partial structural diagram of a retractable device provided in an embodiment of the present application.

[0036] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0038] Please refer to Figure 1 , Figure 1 FIG2 is a schematic diagram of the structure of a retractable and deployable device provided in an embodiment of the present application. The retractable and deployable device 000 may include: a crossbeam 100, a passive heave compensation assembly 200, two guide pulleys 300, a cable assembly 400, two leg assemblies 500, and two winches 600.

[0039] The two leg assemblies 500 in the retractable device 000 can be fixedly connected to the two ends of the beam 100 respectively.

[0040] The two winches 600 in the retractable device 000 can be respectively fixed on the two leg assemblies 500. Here, the retractable device 000 can be installed on the hull through the leg assemblies 500.

[0041] The passive heave compensation assembly 200 in the retractable / retractable device 000 is fixed to the side of the outrigger assembly 500 and located between the winch 600 and the crossbeam 100. The passive heave compensation assembly 200 has a telescopic rod A on the side facing the winch 600. Two guide pulleys 300 are connected to the end of the telescopic rod A and the bottom of the passive heave compensation assembly 200, respectively. It should be noted that the compensation power of the passive heave compensation assembly 200 comes from the heave of the hull itself in the waves. When the hull heaves and sinks, it compensates for the heave caused by the waves to a certain extent.

[0042] The cable assembly 400 in the retractable device 000 may include a pulley block 401 and a cable 402 . At least some of the pulleys in the pulley block 401 may be installed on the beam 100 and the leg assembly 500 .

[0043] The first end of the cable 402 can be wound around one winch 600, and the second end of the cable 402 can be sequentially passed through two guide pulleys 300 and the pulley block 401 before being wound around another winch 600. Here, the portion between the first and second ends of the cable 402 can be used to hoist the exploration equipment.

[0044] In the embodiment of the present application, a passive heave compensation assembly 200 is provided on the side of the leg assembly 500, and two guide pulleys 300 are provided at both ends of the passive heave compensation assembly 200. In this way, the cable 402 extending from the winch 600 can be wound around the two guide pulleys 300 in sequence. In this way, when the retracting and launching device 000 is in a working state on the hull, when the hull is subjected to the influence of factors such as wind, waves, and currents on the sea surface and performs an upward movement, the hull has a large inertia, and the retracting and launching device 000 is subjected to an additional impact load. The tension of the cable 402 increases, driving the guide pulley 300 connected to the telescopic rod A in the passive heave compensation component 200 to move toward the direction close to the passive heave compensation component 200, and the passive heave compensation component 200 can absorb the movement of the guide pulley 300. At the same time, the cable 402 is released to compensate for the upward movement of the hull, thereby effectively avoiding the sudden change in the tension of the cable 402 from causing an impact on the beam 100 and the support leg assembly 500, thereby ensuring the normal operation of the retracting and launching device 000.

[0045] If the hull is subjected to the influence of factors such as wind, waves, and currents on the sea surface and is subjected to a downward movement, the hull has a large inertia and the cable tension is reduced. The passive heave compensation component 200 can drive the guide pulley 300 to move away from the passive heave compensation component 200 through the telescopic rod A, thereby compensating for the downward movement of the hull, thereby tightening the cable 402 to restore the tension, and will not cause the undesirable phenomenon of a sudden drop in the tension of the cable 402.

[0046] In summary, embodiments of the present application provide a retractable and deployable device that may include: a beam, a passive heave compensation assembly, a cable assembly, two guide pulleys, two leg assemblies, and two winches. By disposing a passive heave compensation assembly on the side of the leg assembly and two guide pulleys at each end of the passive heave compensation assembly, the cable extending from the winch can be sequentially wound around the two guide pulleys. Thus, when the retractable and deployable device is in operation on a vessel, and the vessel is subjected to upward movement due to factors such as wind, waves, and currents on the sea surface, the vessel has a large inertia, and the retractable and deployable device is subjected to additional impact loads. Increased cable tension drives the guide pulley connected to the telescopic rod toward the passive heave compensation assembly, which absorbs the movement of the guide pulley. Simultaneously, the cable is released, compensating for the upward movement of the vessel. This effectively prevents sudden changes in cable tension from impacting the beam and leg assemblies, ensuring the normal operation of the retractable and deployable device. If the hull is subjected to the influence of factors such as wind, waves and currents on the sea surface and is subjected to downward movement, the hull has a large inertia and the cable tension is reduced. The passive heave compensation component can drive the guide pulley to move away from the passive heave compensation component through the telescopic rod, thereby compensating for the downward movement of the hull, thereby tightening the cable to restore the tension, and will not cause the undesirable phenomenon of a sudden drop in the cable tension.

[0047] In the examples of this application, please refer to Figure 2 , Figure 2 This is a front view of a retractable device provided in an embodiment of the present application. The number of passive heave compensation assemblies 200 in the retractable device 000 can be two, and the two sets of passive heave compensation assemblies 200 can be connected to the two leg assemblies 500 in a one-to-one correspondence. It should be noted that the structure and functional principles of the two sets of passive heave compensation assemblies 200 are identical and will not be further described in the present embodiment.

[0048] Optional, please refer to Figure 3 and Figure 4 , Figure 3 is a side view of a retractable device provided in an embodiment of the present application, Figure 4 yes Figure 3A partial enlarged schematic diagram at point A. The passive heave compensation assembly 200 in the retractable / retractable device 000 may include a hydraulic cylinder 201 and an accumulator 202. Both the hydraulic cylinder 201 and the accumulator 202 may be fixed to the leg assembly 500, and the hydraulic cylinder 201 may be located between the winch 600 and the crossbeam 100. The hydraulic cylinder 201 and the accumulator 202 are connected. The end of the hydraulic cylinder 201 facing the winch 600 may have a hydraulic rod 201a, which may be a telescopic rod A. The two guide pulleys 300 may be a first guide pulley B1 and a second guide pulley B2, respectively. The first guide pulley B1 may be rotatably connected to the end of the hydraulic rod 201a, and the second guide pulley B2 may be rotatably connected to the bottom of the hydraulic cylinder 201. The second end of the cable 402 may be sequentially passed through the second guide pulley B2, the first guide pulley B1, and the pulley block 401 before being wound around another winch 600.

[0049] Thus, when the retractable device 000 is in operation on the hull, as the hull rises with the waves, the tension in the cable 402 in the cable assembly 400 increases. This increased cable tension compresses the hydraulic rod 201a, causing the hydraulic oil in the hydraulic cylinder 201 to flow into the accumulator 202, thereby releasing a section of cable to reduce the cable tension and compensate for the upward movement of the hull. This effectively reduces the impact on the crossbeam 100 and the leg assembly 500, ensuring the stable operation of the retractable device 000. Conversely, as the hull moves downward with the waves, the tension in the cable 402 in the cable assembly 400 decreases, and the thrust of the hydraulic cylinder 201 forces the hydraulic rod 201a to move outward, thereby tightening the cable to restore tension. This prevents a sudden drop in cable tension and compensates for the hull's downward movement. In other words, by extending and retracting the hydraulic rod 201a, cable tension fluctuations can be reduced, ensuring constant cable tension and position during retraction of the exploration equipment.

[0050] In this application, please refer to Figure 5 , Figure 5 It is a partial structural cross-sectional view of a retractable device provided in an embodiment of the present application. The hydraulic cylinder 201 may have a hydraulic cavity a1, and a portion of the hydraulic rod 201a may be located in the hydraulic cavity a1 and may slide relative to the inner wall of the hydraulic cavity a1. The bottom of the hydraulic cylinder 201 may have an oil port b1, and the hydraulic cylinder 201 may be connected to the accumulator 202 through the oil port b1. For example, the passive heave compensation assembly 200 may also include: a connecting hose (not shown in the figure), the two ends of which are respectively connected to the accumulator 202 and the oil port b1.

[0051] In the embodiments of this application, Figure 4As shown, the first guide pulley B1 may have a first winding-in end R1 and a first winding-out end R2 distributed along the circumference of the first guide pulley B1, and the second guide pulley B2 may have a second winding-in end R3 and a second winding-out end R4 distributed along the circumference of the second guide pulley B2. The first winding-in end R1 of the first guide pulley B1 and the second winding-out end R4 of the second guide pulley B2 may be flush along the extension direction of the hydraulic cylinder 201, and the first winding-out end R2 of the first guide pulley B1 and the second winding-in end R3 of the second guide pulley B2 may be flush along the extension direction of the hydraulic cylinder 201. In this case, by arranging the first winding-in end R1 of the first guide pulley B1 and the second winding-out end R4 of the second guide pulley B2 to be flush, and the first winding-out end R2 of the first guide pulley B1 and the second winding-in end R3 of the second guide pulley B2 to be flush, the cable can slide smoothly on the first guide pulley B1 and the second guide pulley B2, thereby reducing the probability of adverse phenomena such as uneven wear of the cable 402 and the two guide pulleys. It should be noted that the portion of the cable 402 wrapped around the first guide pulley B1 is located between the first winding-in end R1 and the first winding-out end R2 of the first guide pulley B1; the portion of the cable 402 wrapped around the second guide pulley B2 is located between the second winding-in end R3 and the second winding-out end R4 of the second guide pulley B2.

[0052] Optional, such as Figure 4 As shown, the passive heave compensation assembly 200 may further include a first pulley support 204 and a second pulley support 205. The first pulley support 204 may be fixedly connected to the end of the hydraulic rod 201a, and the second pulley support 205 may be fixedly connected to the bottom of the hydraulic cylinder 201. The first guide pulley B1 may be rotatably connected to the first pulley support 204, and the second guide pulley B2 may be rotatably connected to the second pulley support 205. In this case, by providing the first pulley support 204 to connect the first guide pulley B1 to the end of the hydraulic rod 201a in the hydraulic cylinder 201, the connection between the first guide pulley B1 and the hydraulic cylinder 201 is improved, eliminating the need for extensive modifications to the hydraulic rod 201a in the hydraulic cylinder 201. Furthermore, by providing the second pulley support 205 to connect the second guide pulley B2 to the bottom of the hydraulic cylinder 201, the connection between the second guide pulley B2 and the hydraulic cylinder 201 is also improved.

[0053] In the examples of this application, please refer to Figure 4 and Figure 6 , Figure 6This is a partial structural diagram of a retraction and deployment device provided in an embodiment of the present application. The first pulley support 204 in the passive heave compensation assembly 200 may include a first connecting plate 2041 and two first side plates 2042. One side of the first connecting plate 2041 may be fixedly connected to the end of the hydraulic rod 201a in the hydraulic cylinder 201, and the two first side plates 2042 may be fixed to the side of the first connecting plate 2041 facing away from the hydraulic rod 201a. The two first side plates 2042 are disposed opposite each other, and a first mounting groove c1 may be defined between the two first side plates 2042. A portion of the first guide pulley B1 may be positioned within the first mounting groove c1 and rotatably connected to the two first side plates 2042. The second pulley support 205 may include a second connecting plate 2051 and two second side plates 2052. One side of the second connecting plate 2051 may be fixedly connected to the bottom of the hydraulic cylinder 201, and the two second side plates 2052 may be fixed to the side of the second connecting plate 2051 facing away from the hydraulic cylinder 201. The two second side plates 2052 are arranged opposite to each other and a second installation groove c2 may be defined between the two second side plates 2052 . At least a portion of the second guide pulley B2 may be located in the second installation groove c2 and may be rotatably connected to the two second side plates 2052 .

[0054] In this case, a first mounting groove c1 for mounting the first guide pulley B1 is formed between the two first side plates 2042 in the first pulley support 204, thereby ensuring the installation and positioning accuracy of the first guide pulley B1 and achieving a rotational connection between the first guide pulley B1 and the first side plate 2042. In addition, a second mounting groove c2 for mounting the second guide pulley B2 is formed between the two second side plates 2052 in the second pulley support 205, thereby ensuring the installation and positioning accuracy of the second guide pulley B2 and achieving a rotational connection between the second guide pulley B2 and the second side plate 2052.

[0055] Optional, such as Figure 2As shown, the hydraulic cylinder 201 and winch 600 in the passive heave compensation assembly 200 can both be fixed to the side of the leg assembly 500 facing away from the beam 100. The pulley assembly 401 in the cable assembly 400 can include two fixed pulleys L1, three fixed pulleys L2, and two movable pulleys L3, corresponding one to each of the two leg assemblies 500. Each fixed pulley L1 can be mounted on a corresponding leg assembly 500 and can be located on the side of the hydraulic cylinder 201 facing away from the winch 600. The three fixed pulleys L2 can be distributed between the two leg assemblies 500, with one fixed pulley L2 mounted on the side of one leg assembly 500 facing the beam 100, another fixed pulley L2 mounted on the side of the other leg assembly 500 facing the beam 100, and yet another fixed pulley L2 mounted in the center of the beam 100. One movable pulley L3 may be distributed between a group of two adjacent fixed pulleys L2, and another movable pulley L3 may be distributed between another group of two adjacent fixed pulleys L2.

[0056] For example, after extending from one winch 600, the second end of the cable 402 can be passed through a fixed pulley L1, a fixed pulley L2, a movable pulley L3, another fixed pulley L2, another movable pulley L3, another fixed pulley L2, another fixed pulley L1, and then wound around another winch 600.

[0057] In the embodiments of this application, Figure 2 and Figure 4 As shown, the hydraulic cylinder 201 in the passive heave compensation assembly 200 is tilted, and the orthographic projection of the second guide pulley B2 connected to the bottom of the hydraulic cylinder 201 on the target plane can be non-overlapping with the orthographic projection of the fixed pulley L1 on the target plane. The target plane can be the plane containing the central axis Z of the fixed pulley L1. In this case, by tilting the hydraulic cylinder 201, the cable 402 can be minimized from poor contact and wear with the hydraulic cylinder 201 as it passes through the second guide pulley B2, the first guide pulley B1, and the pulley assembly 401.

[0058] Optional, such as Figure 6 As shown, the side of the leg assembly 500 may have two mounting brackets 501, and the hydraulic cylinder 201 may be fastened to these two mounting brackets 501. In this case, by providing the mounting brackets 501 on the side of the leg assembly 500, the hydraulic cylinder 201 can be fastened to the mounting brackets 501 to achieve connection with the leg assembly 500. For example, the mounting brackets 501 may be an annular clamp, and the hydraulic cylinder 201 can be detachably connected to the annular clamp, facilitating installation, removal, and maintenance of the passive heave compensation assembly.

[0059] In summary, embodiments of the present application provide a retractable and deployable device that may include: a beam, a passive heave compensation assembly, a cable assembly, two guide pulleys, two leg assemblies, and two winches. By disposing a passive heave compensation assembly on the side of the leg assembly and two guide pulleys at each end of the passive heave compensation assembly, the cable extending from the winch can be sequentially wound around the two guide pulleys. Thus, when the retractable and deployable device is in operation on a vessel, and the vessel is subjected to upward movement due to factors such as wind, waves, and currents on the sea surface, the vessel has a large inertia, and the retractable and deployable device is subjected to additional impact loads. Increased cable tension drives the guide pulley connected to the telescopic rod toward the passive heave compensation assembly, which absorbs the movement of the guide pulley. Simultaneously, the cable is released, compensating for the upward movement of the vessel. This effectively prevents sudden changes in cable tension from impacting the beam and leg assemblies, ensuring the normal operation of the retractable and deployable device. If the hull is subjected to the influence of factors such as wind, waves and currents on the sea surface and is subjected to downward movement, the hull has a large inertia and the cable tension is reduced. The passive heave compensation component can drive the guide pulley to move away from the passive heave compensation component through the telescopic rod, thereby compensating for the downward movement of the hull, thereby tightening the cable to restore the tension, and will not cause the undesirable phenomenon of a sudden drop in the cable tension.

[0060] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0061] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0062] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A retractable device, characterized in that: include: transom, passive heave compensation assembly, cable assembly, two guide pulleys, two outrigger assemblies, and two winches; The two leg assemblies are respectively fixedly connected to the two ends of the crossbeam; The two winches are respectively fixed on the two leg assemblies; The passive heave compensation assembly is fixed to the side of the leg assembly and is located between the winch and the crossbeam, and the passive heave compensation assembly has a telescopic rod on the side facing the winch, and the two guide pulleys are respectively connected to the end of the telescopic rod and the bottom of the passive heave compensation assembly; The cable assembly includes a pulley block and a cable, at least some of the pulleys in the pulley block are mounted on the crossbeam and the leg assembly; The first end of the cable is wound around one of the winches, and the second end of the cable is sequentially passed through the two guide pulleys and the pulley block and then wound around the other winch.

2. The retractable device according to claim 1, characterized in that: The passive heave compensation assembly includes: a hydraulic cylinder and an accumulator, both of which are fixed to the leg assembly, the hydraulic cylinder and the accumulator being connected, the hydraulic cylinder having a hydraulic rod at one end facing the winch, the hydraulic rod being the telescopic rod; the two guide pulleys being a first guide pulley and a second guide pulley, the first guide pulley being rotatably connected to the end of the hydraulic rod, and the second guide pulley being rotatably connected to the bottom of the hydraulic cylinder; The second end of the cable is passed through the second guide pulley, the first guide pulley and the pulley block in sequence and then wound around another winch.

3. The retractable device according to claim 2, characterized in that: The first guide pulley has a first winding-in end and a first winding-out end distributed along the circumference of the first guide pulley, and the second guide pulley has a second winding-in end and a second winding-out end distributed along the circumference of the second guide pulley; The first winding-in end and the second winding-out end are flush along the extension direction of the hydraulic cylinder, and the first winding-out end and the second winding-in end are flush along the extension direction of the hydraulic cylinder.

4. The retractable device according to claim 2, characterized in that: The passive heave compensation assembly further includes: a first pulley support and a second pulley support, the first pulley support being fixedly connected to the end of the hydraulic rod, and the second pulley support being fixedly connected to the bottom of the hydraulic cylinder; Wherein, the first guide pulley is rotatably connected to the first pulley support, and the second guide pulley is rotatably connected to the second pulley support.

5. The retractable device according to claim 4, characterized in that: The first pulley support includes: a first connecting plate and two first side plates, one side of the first connecting plate is fixedly connected to the end of the hydraulic rod, the two first side plates are fixed to the side of the first connecting plate facing away from the hydraulic rod, the two first side plates are arranged opposite to each other and a first mounting groove is defined between the two first side plates, a portion of the first guide pulley is located in the first mounting groove and is rotatably connected to the two first side plates; The second pulley support includes: a second connecting plate and two second side plates, one side of the second connecting plate is fixedly connected to the bottom of the hydraulic cylinder, the two second side plates are fixed on the side of the second connecting plate away from the hydraulic cylinder, the two second side plates are arranged opposite to each other and a second mounting groove is provided between the two second side plates, and a portion of the second guide pulley is located in the second mounting groove and is rotatably connected to the two second side plates.

6. The retractable device according to any one of claims 2 to 5, characterized in that: The hydraulic cylinder and the winch are both fixed on the side of the leg assembly away from the crossbeam, and the pulley group includes: two fixed pulleys, three fixed pulleys and two movable pulleys corresponding to the two leg assemblies one by one; The fixed pulley is mounted on the corresponding leg assembly and is located on the side of the hydraulic cylinder facing away from the winch; The three fixed pulleys are distributed between the two leg assemblies, with one fixed pulley installed on a side of the leg assembly facing the crossbeam, another fixed pulley installed on a side of the other leg assembly facing the crossbeam, and another fixed pulley installed in a central area of ​​the crossbeam; One movable pulley is distributed between two adjacent fixed pulleys in a group, and another movable pulley is distributed between two adjacent fixed pulleys in another group.

7. The retractable device according to claim 6, characterized in that: The hydraulic cylinder is tilted, and the orthographic projection of the second guide pulley on the target plane does not overlap with the orthographic projection of the fixed pulley on the target plane. The target plane is the plane where the central axis of the fixed pulley is located.

8. The retractable device according to claim 6, characterized in that: The side surfaces of the leg assembly are provided with two mounting brackets, and the hydraulic cylinder is fastened to the mounting brackets.

9. The retractable device according to any one of claims 1-5, 7-8, characterized in that: There are two groups of the passive heave compensation components, and the two groups of the passive heave compensation components are respectively connected to the two leg assemblies in a one-to-one correspondence.

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