A liftable ship's bridge and method of retrofitting the same

Abstract

The application discloses a liftable ship bridge and a modification method thereof. The liftable ship bridge comprises a lower body fixed on a deck, an upper cover comprising an upper body and a top cover plate, the top cover plate being capped on the top side of the upper body, the upper body being sleeved on the outer periphery of the lower body, a lifting hydraulic oil cylinder with a bottom end fixed on the deck and a top end connected with the upper cover, the upper cover being lifted or lowered relative to the lower body by the lifting hydraulic oil cylinder, and a locking device comprising a lock post and a lock sleeve, the lock post being slidingly installed on the top of the lower body, the lock sleeve being fixed on the bottom of the upper body, the lock post being inserted into or separated from the lock sleeve by sliding of the lock post, and the upper body being locked or unlocked. After the upper cover is lifted into position, the lock post of the locking device is inserted into the lock sleeve, the upper cover can be locked by a mechanical mode, the reliability requirement of the lifting hydraulic cylinder is greatly reduced, and the safety is improved.

Description

Technical Field

[0001] This application relates to the field of marine technology, and in particular to a liftable ship's bridge and a method for modifying it. Background Technology

[0002] When a ship encounters obstacles such as bridges crossing a river while navigating its course, especially when the ship is empty or carrying little cargo and has a low draft, the top of the wheelhouse may touch the bridge. To address this issue, some existing wheelhouse designs are height-adjustable. This is achieved by adding hydraulic cylinders or worm gears to the bottom of the wheelhouse to adjust its height. When encountering a bridge, the height is lowered using this mechanism to allow the ship to pass through the underpass; after passing the bridge, the wheelhouse is raised again to its normal operating height. However, the wheelhouse is only lowered when passing under bridges; it remains raised for most of the time. In existing height-adjustable wheelhouse structures, the raised wheelhouse is locked solely by the braking mechanism. The weight of the wheelhouse acts on this mechanism, placing extremely high demands on its reliability. If the braking mechanism fails, the wheelhouse may fall uncontrollably, potentially causing a safety accident. Summary of the Invention

[0003] The purpose of this invention is to provide a liftable ship bridge and a method for modifying it, which can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] On the one hand, a liftable ship's bridge is provided, including:

[0006] The lower enclosure is fixed to the deck.

[0007] The upper cover includes an upper enclosure and a top cover plate, the top cover plate sealing the top side of the upper enclosure; the upper enclosure is fitted around the outer periphery of the lower enclosure.

[0008] The lifting hydraulic cylinder is fixed at its bottom to the deck and connected to the top cover. The lifting hydraulic cylinder drives the top cover to rise and fall relative to the lower enclosure.

[0009] The locking device includes a locking pin and a locking sleeve. The locking pin is slidably installed on the top of the lower enclosure, and the locking sleeve is fixed to the bottom of the upper enclosure. By sliding the locking pin, the locking pin can be inserted into or disengaged from the locking sleeve, thereby locking or unlocking the upper enclosure.

[0010] Optionally, the top of the lifting hydraulic cylinder is provided with a first ball head, and the top of the inner cover is provided with a ball head seat. The first ball head is embedded in the ball head seat to realize the connection between the lifting hydraulic cylinder and the upper cover.

[0011] Optionally, the locking device further includes a locking hydraulic cylinder, which is fixed to the top of the lower enclosure. The locking pin is connected to the piston rod of the locking hydraulic cylinder, and the locking pin is driven to engage or disengage from the locking sleeve by the locking hydraulic cylinder.

[0012] Optionally, the locking device further includes a mounting sleeve, which is fixedly installed on the top of the lower enclosure. The locking hydraulic cylinder is fixedly connected to the side of the mounting sleeve away from the locking sleeve. The locking pin is slidably installed in the mounting sleeve, and the piston rod extends into the mounting sleeve to connect with the locking pin.

[0013] Optionally, the piston rod is provided with a second ball head at its end, and the locking pin is provided with a corresponding ball head groove. The second ball head is embedded in the ball head groove to realize the connection between the piston rod and the locking pin.

[0014] Optionally, the locking pin includes a locking pin body and a locking pin fastening head. The ball head groove includes a hemispherical groove disposed on the locking pin body and a connecting through groove disposed on the locking pin fastening head. The locking pin fastening head is sleeved on the piston rod through the connecting through groove and abuts against the second ball head. The locking pin body is embedded with the second ball head through the hemispherical groove, and the locking pin body and the locking pin fastening head are fixedly connected, thereby realizing that the second ball head is completely embedded in the ball head groove.

[0015] Optionally, the inner wall of the upper enclosure is provided with guide rollers, which abut against the outer wall of the lower enclosure to guide the lifting and lowering movement of the upper cover.

[0016] Optionally, the outer wall of the lower enclosure is provided with a guide rail that cooperates with the guide roller.

[0017] On the other hand, a method for modifying a ship's bridge is provided, for converting a fixed ship's bridge into the aforementioned liftable ship's bridge, wherein the fixed ship's bridge includes an enclosure and a ceiling fixed to the top side of the enclosure, and includes the following steps:

[0018] S1. A lifting hydraulic cylinder is installed inside the fixed ship's wheelhouse, with the bottom of the lifting hydraulic cylinder fixed to the deck and the top fixedly connected to the ceiling;

[0019] S2. Cut horizontally from the middle of the enclosure to divide the enclosure into an upper enclosure and a lower enclosure, wherein the upper enclosure and the ceiling form the upper cover;

[0020] S3. Cut the lower enclosure from the deck, then cut each wall panel of the lower enclosure, remove the excess of each wall panel according to the designed size of the lower enclosure, and then weld the wall panels together to form the lower enclosure;

[0021] S4. Re-weld the lower enclosure to the deck;

[0022] S5. Install a locking pin on the lower enclosure and a locking sleeve on the upper cover.

[0023] Optionally, after completing step S3, guide rollers are first installed on the outer wall of the lower enclosure, the position of the lower enclosure is adjusted so that each guide roller can abut against the inner side of the upper enclosure, and then the lower enclosure is welded and fixed to the deck.

[0024] The beneficial effects of this application are as follows:

[0025] This invention provides a liftable ship bridge, comprising a lower body and an upper cover fitted outside the lower body. A lifting hydraulic cylinder connected to the upper cover is installed on the deck. The lifting hydraulic cylinder controls the raising and lowering of the upper cover relative to the lower body, thereby adjusting the height of the entire liftable ship bridge. This design also includes a locking device that can lock the upper cover. When the upper cover is raised to its position, the locking pin of the locking device is inserted into the locking sleeve, mechanically locking the upper cover. At this time, the driving force of the lifting hydraulic cylinder can be released, and the weight of the upper cover falls on the locking device, avoiding prolonged pressure on the lifting hydraulic cylinder after it is raised. Therefore, the reliability requirements of the lifting hydraulic cylinder are greatly reduced, and the safety accident caused by brake failure due to oil leakage of the lifting hydraulic cylinder can be avoided, thus improving the safety of the liftable ship bridge of this invention.

[0026] On the other hand, this invention also provides a method for modifying a ship's bridge, which can convert a traditional fixed ship's bridge into the aforementioned liftable ship's bridge. During modification, the existing fixed ship's bridge structure can be directly utilized. After installing a lifting hydraulic cylinder as support, the enclosure can be directly divided into upper and lower parts. The lower enclosure can be cut open and modified to a smaller size. The lifting hydraulic cylinder used as support does not need to be removed after modification. Therefore, the modification method of this invention has the advantages of low modification difficulty and low modification loss, and can convert an existing fixed ship's bridge into the liftable ship's bridge of this invention at a relatively low cost. Similarly, the liftable ship's bridge of this solution has the advantages of low modification difficulty, low modification loss, and low modification cost. Attached Figure Description

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] Figure 1This is a three-dimensional structural diagram of the liftable ship's bridge as described in the embodiments of this application;

[0029] Figure 2 This is a side view of the liftable ship's bridge as described in the embodiments of this application;

[0030] Figure 3 This is one of the partial schematic diagrams of the liftable ship bridge described in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the locking device described in the embodiments of this application;

[0032] Figure 5 This is a second partial schematic diagram of the liftable ship's bridge as described in the embodiments of this application.

[0033] In the picture:

[0034] 1. Lower enclosure; 2. Upper cover; 21. Upper enclosure; 22. Top cover plate; 3. Lifting hydraulic cylinder; 4. Locking device; 41. Locking column; 411. Locking column body; 412. Locking column fastening head; 42. Lock sleeve; 43. Locking hydraulic cylinder; 431. Piston rod; 432. Second ball head; 44. Mounting sleeve; 5. Guide roller. Detailed Implementation

[0035] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The cab is only lowered when crossing a bridge, and it is raised most of the time. In the existing liftable cab structure, the cab is locked by the brake of the adjustment mechanism after it is raised. The weight of the cab acts on the adjustment mechanism, which places extremely high demands on the reliability of the adjustment mechanism. When the brake of the adjustment mechanism fails, the cab will fall out of control, which can easily cause a safety accident.

[0039] To overcome the above problems, such as Figure 1-2 As shown, this embodiment provides a liftable ship bridge, including:

[0040] Lower enclosure 1, fixed to the deck;

[0041] The upper cover 2 includes an upper enclosure 21 and a top cover plate 22, wherein the top cover plate 22 covers the top side of the upper enclosure 21; the upper enclosure 21 is fitted around the outer periphery of the lower enclosure 1.

[0042] The lifting hydraulic cylinder 3 is fixed at the bottom to the deck and connected to the top of the upper cover 2. The upper cover 2 is driven to rise and fall relative to the lower enclosure 1 by the lifting hydraulic cylinder 3.

[0043] The locking device 4 includes a locking pin 41 and a locking sleeve 42. The locking pin 41 is slidably installed on the top of the lower enclosure 1, and the locking sleeve 42 is fixed to the bottom of the upper enclosure 21. By sliding the locking pin 41, the locking pin 41 can be inserted into or disengaged from the locking sleeve 42, thereby locking or unlocking the upper enclosure 21.

[0044] The purpose of the locking device 4 is to lock the upper cover 2 at a certain height. Specifically, the locking pin 41 is installed on the top of the lower body 1, and the locking sleeve 42 is fixed to the bottom of the upper body 21. When the upper cover 2 rises to the highest position, the locking sleeve 42 can be aligned with the locking pin 41. At this time, the locking pin 41 can be slid out and engaged with the locking sleeve 42 to lock the upper cover 2 in that position. When it is necessary to lower the upper cover 2, the locking device 4 can be unlocked by simply letting the locking pin 41 slide out of the locking sleeve 42. At this time, the lifting hydraulic cylinder 3 can drive the upper cover 2 to descend.

[0045] Regarding the setting of the lifting hydraulic cylinder 3, preferably, at least one lifting hydraulic cylinder 3 is set at each of the four inner corners of the lower enclosure 1; when the width of the side wall of the lower enclosure 1 is large, the lifting hydraulic cylinder 3 can be added at the middle position of the inner side of the corresponding side wall.

[0046] Regarding the setting of the locking device 4, preferably, at least one locking pin 41 is set at each of the four corners of the lower body 1, and a locking sleeve 42 is set on the inner side of the upper cover 2 respectively, so as to support the four corners of the upper cover 2 with the locking device 4 and ensure the balance and stability of the upper cover 2.

[0047] Based on the liftable ship bridge of this embodiment, when the ship encounters a bridge with too low a height that affects passage during navigation, it is necessary to lower the top cover 2 to reduce the height of the bridge. The specific operation is as follows: start the lifting hydraulic cylinder 3, and use the lifting hydraulic cylinder 3 to slightly lift the top cover 2 upward, eliminating the pressure of the locking sleeve 42 on the locking pin 41. At this time, there is no friction or the friction is small between the locking sleeve 42 and the locking pin 41, and the locking pin 41 can be easily slid to the position where it is disengaged from the locking sleeve 42. After the locking pin 41 is disengaged, switch the oil inlet direction of the lifting hydraulic cylinder 3, so that the lifting hydraulic cylinder 3 drives the top cover 2 to slowly descend. After crossing the bridge, the upper cover 2 needs to be raised and restored. The specific operation is as follows: The lifting hydraulic cylinder 3 is activated to gradually lift the upper cover 2 upwards. When the locking sleeve 42 aligns with the locking pin 41, the locking pin 41 is slid out and inserted into the locking sleeve 42. Then, the driving force of the lifting hydraulic cylinder 3 is released, and the upper cover 2, under its own weight, slightly descends until the locking sleeve 42 presses firmly against the locking pin 41, thus mechanically locking the upper cover 2 in the raised position. Therefore, after the upper cover 2 is fixedly raised, the lifting hydraulic cylinder 3 in this solution no longer needs to provide support for the upper cover 2, and its driving force can be released.

[0048] In summary, in this embodiment, after the upper cover 2 is raised to its position, the locking pin 41 of the locking device 4 is inserted into the locking sleeve 42, which can mechanically lock the upper cover 2. At this time, the driving force of the lifting hydraulic cylinder can be removed, and the weight of the upper cover 2 falls on the locking device 4, avoiding prolonged pressure on the lifting hydraulic cylinder after it is raised. Therefore, the reliability requirements of the lifting hydraulic cylinder are greatly reduced. At the same time, the safety accident caused by brake failure due to oil leakage of the lifting hydraulic cylinder can be avoided, thus improving the safety of the liftable ship bridge of the present invention.

[0049] In one embodiment, the top of the lifting hydraulic cylinder 3 is provided with a first ball head, and the top of the inner cover 2 is provided with a ball head seat. The first ball head is embedded in the ball head seat to realize the connection between the lifting hydraulic cylinder 3 and the upper cover 2.

[0050] Specifically, during navigation on water, ships are prone to swaying due to water conditions, and the bridge on board is also prone to swaying. In this solution, the lifting hydraulic cylinder 3 and the upper cover 2 are connected through a first ball head and a ball head seat, which allows slight relative swaying between the upper cover 2 and the lifting hydraulic cylinder 3. This can reduce the lateral torsional force borne by the lifting hydraulic cylinder 3 due to asynchronous swaying between the upper cover 2 and the hull, thereby reducing the risk of bending of the lifting hydraulic cylinder 3.

[0051] In one embodiment, the locking device 4 further includes a locking hydraulic cylinder 43, which is fixed to the top of the lower enclosure 1. The locking pin 41 is connected to the piston rod 431 of the locking hydraulic cylinder 43, and the locking pin 41 is driven by the locking hydraulic cylinder 43 to engage or disengage from the locking sleeve 42.

[0052] By setting a locking hydraulic cylinder 43 to drive the locking column 41, the movement of the locking column 41 can be automatically controlled. Furthermore, it can be connected to the oil pump used to drive the lifting hydraulic cylinder 3, eliminating the need for an additional power source and reducing equipment costs. Preferably, a distance detector can be installed on the outer wall of the lower enclosure 1. This distance detector is linked to the locking hydraulic cylinder 43 for control. Based on the function of the distance detector, when it detects that the upper cover 2 has risen to the position corresponding to the locking column 41 and the locking sleeve 42, the system can automatically control the locking hydraulic cylinder 43 to supply oil, pushing the locking column 41 to the position where it engages with the locking sleeve 42.

[0053] In one embodiment, reference is made to Figure 3-4 The locking device 4 further includes a mounting sleeve 44, which is fixedly installed on the top of the lower enclosure 1. The locking hydraulic cylinder 43 is fixedly connected to the mounting sleeve 44 on the side away from the locking sleeve 42. The locking pin 41 is slidably installed in the mounting sleeve 44. The piston rod 431 extends into the mounting sleeve 44 to connect with the locking pin 41.

[0054] The mounting sleeve 44 provides support for the locking pin 41, improving its sliding stability and load-bearing capacity. The support from the mounting sleeve 44 also reduces the load on the piston rod 431 of the locking hydraulic cylinder 43, preventing damage from pressure. Preferably, a flange is provided on one side of the locking pin 41, and a corresponding flange is provided on the locking hydraulic cylinder 43. Bolts are used to pass through the two flanges to fix the locking hydraulic cylinder 43 to the mounting sleeve 44.

[0055] In one embodiment, the piston rod 431 is provided with a second ball head 432 at its end, and the locking pin 41 is provided with a corresponding ball head groove. The second ball head 432 is embedded in the ball head groove to realize the connection between the piston rod 431 and the locking pin 41.

[0056] The piston rod 431 and the locking pin 41 are connected by the second ball joint 432, which prevents slippage and allows for slight relative oscillation between them. This means that when the upper cover 2 and the lower body 1 shake asynchronously, the upper cover 2 can cause the locking pin 41 to slightly deflect. In other words, the locking pin 41 in this structure has a certain buffering effect, and it does not cause the piston rod 431 to deflect, thus avoiding the problem of piston rod 431 bending. To achieve a certain amount of deflection, the locking pin 41 and the mounting sleeve 44 have a certain clearance.

[0057] In one embodiment, reference is made to Figure 4 The locking pin 41 includes a locking pin body 411 and a locking pin fastening head 412. The ball head groove includes a hemispherical groove disposed on the locking pin body 411 and a connecting through groove disposed on the locking pin fastening head 412. The locking pin fastening head 412 is sleeved on the piston rod 431 through the connecting through groove and abuts against the second ball head 432. The locking pin body 411 is embedded and engaged with the second ball head 432 through the hemispherical groove, and the locking pin body 411 and the locking pin fastening head 412 are fixedly connected, thereby realizing that the second ball head 432 is completely embedded in the ball head groove.

[0058] Specifically, since the diameter of the second ball head 432 is larger than the diameter of the opening of the ball head groove, the second ball head 432 cannot be directly embedded in the ball head groove. Therefore, this solution sets the locking pin 41 as two parts: the locking pin body 411 and the locking pin fastening head 412. During the assembly of the parts, the locking pin fastening head 412 is first fitted onto the piston rod 431, and then the second ball head 432 is welded to the end of the piston rod 431. After that, the locking pin body 411 is installed on the outer circle of the second ball head 432 so that the locking pin body 411 and the locking pin fastening head 412 fit together. Finally, the locking pin body 411 and the locking pin fastening head 412 are welded and fixed.

[0059] In one embodiment, reference is made to Figure 5 The inner wall of the upper enclosure 21 is provided with guide rollers 5, which abut against the outer wall of the lower enclosure 1 to guide the lifting and lowering movement of the upper cover 2.

[0060] Specifically, the support of the guide roller 5 is fixed to the bottom of the inner wall of the upper body 21. During the process of the upper cover 2 rising and falling relative to the lower body 1, the guide roller 5 rolls along the outer wall of the lower body 1, which can effectively reduce the shaking between the upper cover 2 and the lower body 1 and avoid the problem of the lifting hydraulic cylinder 3 being twisted.

[0061] In one embodiment, the outer wall of the lower enclosure 1 is provided with a guide rail that cooperates with the guide roller 5.

[0062] Specifically, a guide groove is provided inside the guide rail, and the guide roller 5 is embedded in the guide groove. Based on the guide rail guiding the guide roller 5, the stability of the upper cover 2 during the lifting process can be further improved.

[0063] On the other hand, a method for modifying a ship's bridge is provided, for converting a fixed ship's bridge into the aforementioned liftable ship's bridge, wherein the fixed ship's bridge includes an enclosure and a ceiling fixed to the top side of the enclosure, and includes the following steps:

[0064] S1. A lifting hydraulic cylinder 3 is installed inside the fixed ship's wheelhouse. The bottom of the lifting hydraulic cylinder 3 is fixed to the deck, and the top is fixedly connected to the ceiling.

[0065] S2. Cut horizontally from the middle of the enclosure to divide the enclosure into an upper enclosure and a lower enclosure, wherein the upper enclosure and the ceiling constitute the upper cover 2;

[0066] S3. Cut the lower enclosure from the deck, then cut each wall panel of the lower enclosure, remove the excess of each wall panel according to the designed size of the lower enclosure 1, and then weld the wall panels together to form the lower enclosure 1;

[0067] S4. Re-weld the lower enclosure 1 to the deck;

[0068] S5. Install a locking pin 41 on the lower enclosure 1 and a locking sleeve 42 on the upper cover 2.

[0069] As can be seen from the above, in the modification method of the ship's bridge in this embodiment, a traditional fixed ship's bridge can be modified into a liftable ship's bridge as described in this embodiment. During modification, the original fixed ship's bridge structure can be directly relied upon. After installing the lifting hydraulic cylinder as a support, the enclosure can be directly divided into upper and lower parts. The lower enclosure can be cut open and modified to a smaller size. After modification, the lifting hydraulic cylinder serving as support does not need to be removed. Therefore, the modification method of this invention has the advantages of low modification difficulty and low modification loss, and can modify the original fixed ship's bridge into the liftable ship's bridge of this invention at a relatively low cost. Similarly, it can be seen that the liftable ship's bridge of this solution has the advantages of low modification difficulty, low modification loss, and low modification cost.

[0070] In one embodiment, after completing step S3, guide rollers 5 are first installed on the outer wall of the lower enclosure 1, the position of the lower enclosure 1 is adjusted so that each guide roller 5 can abut against the inner side of the upper enclosure 21, and then the lower enclosure 1 is welded and fixed to the deck.

[0071] After installing the guide rollers 5, the position of the lower body 1 is adjusted based on the guide rollers 5, and then it is welded and fixed. This ensures that the guide rollers 5 in all directions can abut against the lower body 1 after fixing, so as to achieve an effective guiding effect.

[0072] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0073] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0075] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A method of refitting a bridge of a ship, characterized in that, The application relates to a fixed ship cabin which is modified into a liftable ship cabin, the fixed ship cabin comprises a shelter and a top cover plate fixed to the top side of the shelter, and the liftable ship cabin comprises: a lower enclosure (1) fixed to a deck; an upper cover (2) comprising an upper enclosure (21) and a top cover plate (22), the top cover plate (22) is capped on the top side of the upper enclosure (21); the upper enclosure (21) is sleeved on the outer periphery of the lower enclosure (1); a lifting hydraulic cylinder (3) with a bottom end fixed to the deck and a top end connected to the upper cover (2), the upper cover (2) is driven to lift relative to the lower enclosure (1) through the lifting hydraulic cylinder (3); a locking device (4) comprising a locking column (41) and a locking sleeve (42), the locking column (41) is slidingly installed on the top of the lower enclosure (1), the locking sleeve (42) is fixed to the bottom of the upper enclosure (21), the locking column (41) is inserted into or separated from the locking sleeve (42) through the sliding of the locking column (41), so that the upper enclosure (21) is locked or unlocked; the modification method of the ship cabin comprises the following steps: S1. installing a lifting hydraulic cylinder in the fixed ship cabin, the bottom of the lifting hydraulic cylinder is fixed to the deck, and the top of the lifting hydraulic cylinder is fixedly connected to the top cover plate; S2. cutting the shelter from the middle part to horizontally divide the shelter into an upper enclosure and a lower enclosure, and the upper enclosure and the top cover plate form an upper cover; S3. cutting the lower enclosure from the deck, cutting each wall plate of the lower enclosure, cutting the excess of each wall plate according to the size of the designed lower enclosure, and welding each wall plate to form the lower enclosure; S4. welding the lower enclosure to the deck again; S5. installing a locking column on the lower enclosure and a locking sleeve on the upper cover.

2. The method of retrofitting a ship's bridge of claim 1, wherein, The top of the lifting hydraulic cylinder (3) is provided with a first ball head, the inner top of the upper cover (2) is provided with a ball head seat, the first ball head is embedded into the ball head seat, and the connection between the lifting hydraulic cylinder (3) and the upper cover (2) is realized.

3. The method of retrofitting a ship's bridge of claim 1, wherein, The locking device (4) further comprises a locking hydraulic cylinder (43), the locking hydraulic cylinder (43) is fixed to the top of the lower enclosure (1), the locking column (41) is connected to the piston rod (431) of the locking hydraulic cylinder (43), and the locking column (41) is driven to be inserted into or separated from the locking sleeve (42) through the locking hydraulic cylinder (43).

4. The method of retrofitting a ship's bridge of claim 3, wherein, The locking device (4) further comprises a mounting sleeve (44), the mounting sleeve (44) is fixedly installed on the top of the lower enclosure (1), the locking hydraulic cylinder (43) is fixedly connected to the side of the mounting sleeve (44) away from the locking sleeve (42), the locking column (41) is slidingly installed in the mounting sleeve (44), and the piston rod (431) extends into the mounting sleeve (44) to be connected with the locking column (41).

5. The method of retrofitting a ship's bridge of claim 3, wherein, An end of the piston rod (431) is provided with a second ball head (432), and a ball head groove is correspondingly arranged on the lock post (41), the second ball head (432) is embedded into the ball head groove, so as to realize the connection between the piston rod (431) and the lock post (41).

6. The method of retrofitting a ship's bridge of claim 5, wherein, The lock post (41) comprises a lock post body (411) and a lock post fastening head (412), the ball head groove comprises a half-sphere groove arranged on the lock post body (411) and a connecting through groove arranged on the lock post fastening head (412), the lock post fastening head (412) is sleeved outside the piston rod (431) through the connecting through groove and abuts against the second ball head (432), the lock post body (411) is embeddedly matched with the second ball head (432) through the half-sphere groove, and the lock post body (411) is fixedly connected with the lock post fastening head (412), so as to realize that the second ball head (432) is completely embedded into the ball head groove.

7. The method of retrofitting a ship's bridge of claim 1, wherein, An inner wall of the upper surrounding body (21) is provided with a guide roller (5), the guide roller (5) abuts against an outer wall of the lower surrounding body (1), so as to guide the lifting movement of the upper cover (2).

8. The method of retrofitting a ship's bridge of claim 7, wherein, An outer wall of the lower surrounding body (1) is provided with a guide rail matched with the guide roller (5).

9. The method of retrofitting a ship's bridge of claim 7, wherein, After step S3 is completed, the guide rollers are first installed on the outer wall of the lower surrounding body, the position of the lower surrounding body is adjusted, the guide rollers are respectively capable of abutting against the inner side of the upper surrounding body, and then the lower surrounding body is welded and fixed on the deck.

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