Opening and closing device for telescopic propeller of ship

Abstract

The utility model discloses an opening and closing device for a ship telescopic propeller. The opening and closing device comprises a shell, a cover plate and a moving mechanism. The shell comprises an extending opening used for extending of the telescopic propeller. The cover plate has a closed state and an open state, the cover plate can cover the extending opening when in the closed state, and the extending opening can be exposed when the cover plate is in the open state; the moving mechanism is used for moving the cover plate in the first direction so that the cover plate can be switched between the closed state and the open state. The closed state and the open state are switched through movement of the cover plate, the open hole of the shell can be closed after the propeller retracts into the ship body, and the working efficiency of the propeller cannot be affected after the propeller stretches out of the ship body.

Description

Technical Field

[0001] This application relates to the field of marine retractable thrusters, and particularly to an opening and closing device for a marine retractable thruster. Background Art

[0002] When a ship is in dynamic positioning, berthing, etc., choosing to use a retractable thruster can reduce the resistance of the ship during straight navigation and improve the thruster efficiency. For example, at a relatively wide position of the hull, using a retractable thruster can have higher efficiency than using a tunnel thruster. Figure 1 Shows a schematic diagram of the retractable thruster retracted into the hull when the thruster is not needed; Figure 2 Shows a schematic diagram of the working state of the retractable thruster extending out of the hull.

[0003] From Figure 1 it can be seen that the opening of the retractable thruster is generally arranged at the bottom of the ship, and a large well will be set inside the ship. When the retractable thruster retracts into the ship, a very large opening will be left on the ship's hull. When the ship is sailing, the water flow will form a turbulent flow near this opening, causing a large resistance to the ship, ultimately affecting the ship's speed or resulting in more fuel consumption.

[0004] Therefore, some retractable thrusters are equipped with a sealing plate connected to the thruster to close the opening of the hull when the retractable thruster retracts into the ship's hull. See Figure 3 Schematic diagram of the working state of the retractable thruster with a sealing plate extending out of the hull. Figure 4 Shows a three-dimensional structural schematic diagram of the thruster with a sealing plate. However, when the retractable thruster extends out of the hull with the sealing plate, the sealing plate and the connecting elbow plate below the thruster will disrupt the flow field near the retractable thruster and affect the working efficiency of the retractable thruster.

[0005] Therefore, an opening and closing device for the retractable thruster outlet of a ship is needed, which can not only close the opening of the hull after the thruster retracts into the hull, but also does not affect the working efficiency of the thruster after the thruster extends out of the hull. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides an opening and closing device for a marine retractable thruster, which can switch between a closed state and an open state by the movement of a cover plate, and can not only close the opening of the hull after the thruster retracts into the hull, but also does not affect the working efficiency of the thruster after the thruster extends out of the hull.

[0007] The present application provides an opening and closing device for a telescopic thruster of a ship, which is characterized by including: a housing including an outlet for the telescopic thruster to extend out; a cover plate having a closed state and an open state, the cover plate can cover the outlet when in the closed state and expose the outlet when in the open state; and a moving mechanism for moving the cover plate along a first direction so that the cover plate can be switched between the closed state and the open state.

[0008] In some embodiments, the moving mechanism includes: at least two sets of moving power components arranged on both sides of the cover plate along the first direction for pushing or pulling the cover plate to move the cover plate along the first direction.

[0009] In the above embodiments, at least one set of the moving power components is a winch, the winch includes a drum and a pulling rope, the pulling rope is connected to the cover plate and wound around the drum, and the winch rotates the drum to pull the pulling rope, thereby driving the cover plate to move.

[0010] In some embodiments, the opening and closing device further includes a lifting mechanism for moving the cover plate in a second direction so that the cover plate can be flush with the housing when in the closed state and can be received into the housing when in the open state.

[0011] In the above embodiments, the lifting mechanism includes: a lifting shaft arranged on the cover plate; a lifting arm arranged inside the housing, the lifting arm is movably connected to the lifting shaft and can lift the lifting shaft by rotating the lifting arm, so that the cover plate can move in the second direction; a lifting power component for driving the lifting arm to rotate.

[0012] In some embodiments, the opening and closing device further includes a sliding structure, the sliding structure includes: a sliding shaft arranged on the cover plate; a sliding track arranged inside the housing, and the sliding shaft can slide along the sliding track to define the moving track of the cover plate.

[0013] In some embodiments, the opening and closing device further includes a limiting structure for restricting the cover plate from continuing to move after the cover plate moves to the closed position or the open position.

[0014] In the above embodiments, the limiting structure includes a first limiting component arranged inside the housing and a second limiting component correspondingly arranged on the side surface of the cover plate, and the first limiting component or the second limiting component has a limiting groove, and the corresponding second limiting component or first limiting component has a matching limiting protrusion.

[0015] In some embodiments, the opening and closing device further includes a locking mechanism for fixing the cover plate after it moves to the closed position or the open position.

[0016] In the above embodiments, the locking mechanism includes a latch rod disposed inside the housing, a latch hole correspondingly disposed on the cover plate, and a locking power component for driving the latch rod to insert into or withdraw from the latch hole.

[0017] In some embodiments, the cover plate further includes a strengthening structure, which is a plurality of reinforcing ribs disposed on the cover plate.

[0018] In some embodiments, the opening and closing device further includes a control device for controlling each mechanism.

[0019] In this application, the cover plate is switched between the closed state and the open state by a moving mechanism. When the telescopic thruster is not in use (i.e., retracted into the ship), the cover plate can be moved to the closed state to cover the outlet, avoiding turbulence and reducing the ship resistance during navigation; when the telescopic thruster needs to be used, the cover plate can be moved to the open state to expose the outlet. There is no need to connect a sealing cover plate that affects its propulsion efficiency to the telescopic thruster, which is beneficial to the normal use of the telescopic thruster. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shows a schematic diagram of the telescopic thruster retracted into the hull;

[0021] Figure 2 Shows a schematic diagram of the working state of the telescopic thruster extending out of the hull;

[0022] Figure 3 Shows a schematic diagram of the working state of the telescopic thruster with a sealing plate extending out of the hull;

[0023] Figure 4 Shows a three-dimensional structural schematic diagram of the thruster with a sealing plate;

[0024] Figure 5 Shows a side schematic diagram of the opening and closing device in the closed state;

[0025] Figure 6 Shows a side schematic diagram of the opening and closing device in the open state with the telescopic thruster A extending out;

[0026] Figure 7 Shows a three-dimensional structural schematic diagram of the opening and closing device in the closed state;

[0027] Figure 8 Shows a three-dimensional structural schematic diagram of the opening and closing device in the open state with the telescopic thruster A extending out;

[0028] Figure 9 Schematic three-dimensional structure diagram showing the open state of the cover plate 1;

[0029] Figure 10 Top view showing the open state of the cover plate 1;

[0030] Figure 11 Schematic three-dimensional structure diagram showing the closed state of the cover plate 1;

[0031] Figure 12 Top view showing the open state of the cover plate 1;

[0032] Figure 13 Schematic three-dimensional structure diagram of the cover plate 1;

[0033] Figure 14 Schematic three-dimensional structure diagram of the lifting mechanism;

[0034] Figure 15 Top view of the lifting mechanism;

[0035] Figure 16 Schematic diagram of the working state of the lifting arm 502;

[0036] Figure 17 Schematic diagram of the working state of the lifting mechanism and the sliding mechanism;

[0037] Figure 18 Side view showing a limiting structure;

[0038] Figure 19 Shows Figure 18 Schematic three-dimensional structure diagram of the first limiting member 4a and the second limiting member 4c in

[0039] Figure 20 Top view of the locking state of a locking mechanism;

[0040] Figure 21 Shows Figure 20 Schematic three-dimensional structure diagram of the part of the locking mechanism located inside the housing 2 in

[0041] Figure 22 Shows Figure 21 Side view of the locking mechanism in

[0042] Figure 23 Shows Figure 21 Rear view of the locking mechanism in Specific implementation method

[0043] The present application will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can also make several deformations and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0044] An opening and closing device for a telescopic propeller of a ship, which the present application claims to protect, includes a housing 2, a cover plate 1 and a moving mechanism. Refer to Figures 5 - 8 . Among them Figure 5 is a side view of the closing state of the opening and closing device, Figure 6 is a side view of the opening state of the opening and closing device with the telescopic propeller A extended, Figure 7 is a three-dimensional structural view of the closing state of the opening and closing device, Figure 8 is a three-dimensional structural view of the opening state of the opening and closing device with the telescopic propeller A extended.

[0045] The housing 2 includes an extension opening 203 through which the telescopic propeller A can extend. In some embodiments, the housing 2 is the hull housing. Refer to the bottom hull housing shown in Figures 1 - 2 . In other embodiments, the housing 2 may also include an installation compartment, which can be used to accommodate the cover plate 2 and to set the moving mechanism, etc. The shape and size of the installation compartment can be set according to actual needs. For example, it can be set as the cuboid shown in Figures 5 - 8 . In some embodiments, one side of the installation compartment can be fixed to the inner side of the hull housing by welding or threading, etc., and the other side can be connected to the propeller well B by welding or threading, etc. In other embodiments, one side of the installation compartment can directly replace a part of the hull housing, that is, the installation compartment is embedded in the hull housing, and the other side is connected to the propeller well B. In this implementation mode, the installation compartment is preferably flush with other parts of the hull housing to avoid turbulence and thus reduce the ship resistance. The shape of the extension opening 203 can be set according to the telescopic propeller A, and it should be able to allow the telescopic propeller A to extend and retract smoothly. Although the extension opening 203 shown in Figure 8 is rectangular, in other embodiments, the extension opening 203 can also be circular, oval, triangular or any other shape that can allow the telescopic propeller A to extend and retract through it.

[0046] The closing state and the opening state of the opening and closing device of the present application mainly depend on the state of the cover plate 1. Therefore, Figures 5 - 8In this case, the closed state and the open state of the opening and closing device are also the closed state and the open state of the cover plate 1. When the cover plate 1 is in the closed state, it can cover the outlet 203. When the cover plate 1 is in the open state, it can expose the outlet 203. To avoid turbulent flow, it is preferable that when the cover plate 1 is in the closed state, it can be flush with the outer shell 2, that is, the cover plate 1 needs to be embedded in the outlet 203. In some embodiments, in order to facilitate the movement of the cover plate 1 and avoid the cover plate 1 from colliding with the outer shell 2, the cover plate 1 is slightly smaller than the outlet 203, resulting in a possible gap between the cover plate 1 and the outer shell 2 when the cover plate 1 is in the closed state, allowing water to seep into the outer shell 2 through this gap. Therefore, the telescopic thruster A, the moving mechanism, etc. inside the outer shell 2 need to be able to work in water.

[0047] A moving mechanism for moving the cover plate 1 along the first direction (i.e., Figure 6 the direction shown as D1 in Figure 5 ; the same below), so that the cover plate 1 can be switched between the closed state and the open state. In Figure 6 and

[0048] , the first direction is the left - right direction parallel to the plane where the outlet is located. Figure 5 and Figure 6 In some embodiments, the moving mechanism needs to include at least 2 sets of moving power components. The moving power components are arranged on both sides of the cover plate 1 along the first direction. For example,

[0049] in

[0050] Figure 9 , one set or more sets of moving power components are arranged on each of the left and right sides of the cover plate 1. Arranging multiple sets of moving power components on each side can provide more power and more pushing or pulling points, which is beneficial to pushing or pulling the cover plate 1 more smoothly and quickly. The moving power components can be a combination of one or more of a hydraulic cylinder pushing component, a screw pump pushing component, a winch pulling component, etc. Figure 10 is a schematic three - dimensional structure diagram of the cover plate 1 in the open state, Figure 11 is a top - view diagram of the cover plate 1 in the open state, Figure 12 is a schematic three - dimensional structure diagram of the cover plate 1 in the closed state, Figure 13 is a top - view diagram of the cover plate 1 in the open state, Figures 9 - 13As shown, on the left side of the cover plate 1, there are moving mechanism cover plate components 9f and 9e, and at the corresponding positions of the outer shell 2, there are moving mechanism outer shell components 9b and 9a. Two winches (not shown in the figure) are provided on the left side of the cover plate. The winch ropes of the winches at the lower left (not shown in the figure) are connected to the moving mechanism cover plate component 9e through the moving mechanism outer shell component 9a, and the winch ropes of the winches at the upper left (not shown in the figure) are connected to the moving mechanism cover plate component 9e through the moving mechanism outer shell component 9a. When the cover plate 1 needs to be switched from the open state to the closed state, the two winches on the left side are started simultaneously to pull the winch ropes and pull the cover plate 1 to the left side. Among them, the moving mechanism outer shell components 9b and 9a can be provided with rollers or hooks, etc. as positioning components to adjust the pulling direction of the ropes, or the winch drums can be directly used as the moving mechanism outer shell components 9b and 9a. Correspondingly, on the right side of the cover plate 1, there are moving mechanism cover plate components 9g and 9h, and at the corresponding positions of the outer shell 2, there are moving mechanism outer shell components 9c and 9d. When the cover plate 1 needs to be switched from the closed state to the open state, the two winches on the right side are started simultaneously to pull the winch ropes and pull the cover plate 1 to the right side. When the outer shell 2 includes an installation cabin, the moving mechanism outer shell components can be arranged on the inner sides of two opposite side walls of the installation cabin along the first direction ( Figure 10 and Figure 12 the left and right sides in

[0051] ); when the outer shell 2 does not include an installation cabin, the moving mechanism outer shell components can be directly arranged on the inner side of the outer shell, such as the inner side of the ship bottom, or two side walls can be installed in the outer shell in the first direction for switching between the closed state and the open state of the cover plate 1 to arrange the moving mechanism outer shell components. For the following other structures that need to be arranged on the inner side of the outer shell 2, similar multiple methods can also be adopted.

[0052] In some embodiments, the moving mechanism can also be linked with the telescopic thruster A. For example, the cover plate is connected to the telescopic thruster A through the moving mechanism outer shell component by the rope of the moving mechanism. During the extension process of the telescopic thruster A, the rope is driven to pull the cover plate to the open state position; during the retraction process of the telescopic thruster A, the rope is driven to pull the cover plate to the closed state position.

[0053] Figures 14 - 17 An implementation manner of the lifting mechanism is shown. Among them, Figure 14 is the three-dimensional structure diagram of the lifting mechanism, Figure 15It is a top view of the lifting mechanism. Figure 16 It is a working schematic diagram of the lifting arm 502. Figure 17 It is a working schematic diagram of the lifting mechanism and the sliding mechanism.

[0054] As can be seen from the figure, the lifting mechanism includes a lifting shaft 504, a lifting arm 502, and a lifting power component 501.

[0055] Among them, the lifting shaft 504 is arranged on the cover plate 1. In Figure 15 the embodiment shown, it is arranged on the side of the cover plate 1. In other embodiments, it can also be arranged on the bottom surface of the cover plate or other positions. In some embodiments, there are 2 or more lifting shafts 505, which can be symmetrically arranged on both sides of the cover plate 1.

[0056] The lifting arm 502 is arranged inside the housing 2. The lifting arm 502 is movably connected to the lifting shaft 504 and can lift the lifting shaft 504 by rotating the lifting arm 502 (see Figure 16 ), so that the cover plate 1 can move in the second direction. In some embodiments, the second direction can be a direction perpendicular to the plane where the extension opening 203 is located. During the actual working process, the lifting arm 502 can not only make the cover plate 1 move in the second direction, but also make the cover plate 1 move in the first direction (see Figure 17 ). When the lifting arm 502 rotates to lift the lifting shaft 504, the movement trajectory of the lifting shaft 504 is an arc, and the movement trajectory of the cover plate 1 is also an arc.

[0057] In some embodiments, in order to make the connection between the lifting arm 502 and the lifting shaft 504 more stable, a lifting shaft base 505 can be added between the lifting shaft 504 and the cover plate 1. The cross-sectional area of the lifting shaft base 505 is preferably larger than that of the lifting shaft 504, which can make its connection with the cover plate 1 more stable. In addition, the lifting shaft base 505 also limits the distance between the lifting arm 502 and the cover plate 1, so that the lifting arm 502 will not directly touch the cover plate 1, thus affecting its working efficiency or even causing damage. Although the lifting shaft base 505 in the figure is a cylinder, in other embodiments, the lifting shaft base 505 can use any suitable shape such as a cube or a cuboid.

[0058] The lifting power component 501 is used to drive the lifting arm 502 to rotate. In some embodiments, the lifting power component 501 can be a hydraulic motor or a pneumatic motor. In the figure, it is arranged at the part of the lifting arm 502 close to the housing 2; in other embodiments, the lifting power component 501 can also be arranged at other parts of the lifting arm 502, such as a push rod can be arranged in the middle of the lifting arm 502.

[0059] In some embodiments, the lifting mechanism may further include a lifting arm base 503. For example, the lifting arm 502 in the figure may be connected to the inner side of the housing 2 through the lifting arm base 503, so that the lifting arm 502 can rotate about the hinge joint with the lifting arm base 503. In some embodiments, the lifting power component 501 may be disposed at the hinge joint.

[0060] In some embodiments, there may be multiple sets of lifting mechanisms. For example, one set may be provided on each side of the cover plate 1 and operate synchronously. As Figures 9 - 12 shown, the lifting arms 5a and 5b are respectively disposed on both sides of the inner side of the housing 2 at the position where the cover plate 1 is in the closed state, and the lifting shafts 5c and 5d are correspondingly disposed on both sides of the cover plate 1.

[0061] The lifting mechanism may also adopt other implementation manners. For example, in some embodiments, the lifting mechanism may include a suspension rope disposed above the cover plate. When the cover plate needs to be switched from the closed state to the open state, the cover plate can be lifted to a predetermined height by the suspension rope to realize the movement of the cover plate in the second direction; in other embodiments, the lifting mechanism may also include a push rod disposed on the inner side of the housing 2 and a lifting block correspondingly disposed on the side surface of the cover plate. When the cover plate needs to be switched from the closed state to the open state, the push rod can lift the cover plate to a predetermined height by pushing the lifting block.

[0062] In some embodiments, the opening and closing device further includes a sliding structure. Refer to Figures 9 - 13 、 Figure 17 The sliding structure includes:

[0063] A sliding shaft is disposed on the cover plate 1. In some embodiments, there may be two or more sliding shafts, and they may be symmetrically disposed on both sides of the cover plate. As Figure 9 or Figure 10 shown, the sliding shafts 3a and 3b are disposed on one side of the cover plate 1, and the sliding shafts 3c and 3d are symmetrically disposed on the other side of the cover plate. The sliding shaft can be selected from a roller, a round pin shaft, and other suitable low-friction circular structures. The sliding shafts shown in the figure are single-flange rollers.

[0064] The sliding tracks are arranged inside the outer shell 2 and correspond to the sliding shafts one by one. The sliding shafts can slide along the sliding tracks to define the movement trajectory of the cover plate 1. There are 4 sliding tracks in the figure. Among them, the sliding tracks 2a and 2b are arranged on one side of the cover plate 1. The sliding track 2a corresponds to the sliding shaft 3a, and the sliding track 2b corresponds to the sliding shaft 3b. The sliding tracks 2c and 2d are arranged on the other side of the cover plate 1. The sliding track 2c corresponds to the sliding shaft 3c, and the sliding track 2d corresponds to the sliding shaft 3d. If there are multiple sliding tracks on each side, a necessary distance needs to be maintained between the tracks to ensure that each sliding shaft moves on one sliding track and does not interfere with each other. Different sliding tracks can be set according to different sliding shafts. For example, if a circular pin shaft is used as the sliding shaft, the sliding track can be set as a closed type, so that the circular pin shaft is always wrapped inside the sliding track, and the position of the cover plate 1 is restricted by restricting the circular pin shaft. The sliding track itself has a limiting effect on the cover plate 1 in the third direction (such as Figure 10 the direction shown as D3 in the figure, the same below); at the same time, it can also limit the movement of the sliding shaft in the second direction, so as to also have a limiting effect on the cover plate 1 in the second direction; and when both ends of the sliding track are closed, it also has a limiting effect on the cover plate 1 in the first direction.

[0065] The sliding tracks can be set according to the required movement trajectory of the cover plate 1. For example, when the cover plate 1 only needs to be translated, the sliding track can be designed as a straight line parallel to the movement trajectory of the cover plate 1. In some embodiments, during the process of the cover plate 1 switching from the closed state to the open state, it needs to move in the second direction, such as needing to be lifted a certain height. The sliding track needs to be designed as a shape with a slope, such as Figure 17 the sliding track with an arc-shaped slope shown in the figure. When the cover plate 1 is in the closed state, it covers the outlet 203 and is preferably flush with the outer shell 2; but below the position of the cover plate in the open state, in addition to the outer shell 2, there may also be structural members (longitudinal girders or ribs) of the hull. Therefore, in order to ensure that the outer shell 2 and the hull structure thereon do not affect the movement of the cover plate 1, it is necessary to fully consider the drop of the cover plate 1 in the second direction between the open state and the closed state. After the cover plate moves a sufficient height in the second direction, it then moves along the first direction. As shown in the figure, one end of the sliding track close to the closed position of the cover plate is at a lower height, and one end close to the open position of the cover plate is at a higher height. The transition from the lower side to the higher side of the sliding track can be determined according to the movement trajectory determined by the lifting mechanism.

[0066] In addition to the limiting effect of the sliding track, in some embodiments, the opening and closing device can further include a limiting structure, which is used to limit the continuous movement of the cover plate 1 after the cover plate 1 moves to the closed position or the open position.

[0067] Figure 18A side view of a limiting structure is shown. In the figure, the limiting structure includes a first limiting member 4a disposed inside the outer shell 2 and a second limiting member 4c correspondingly disposed on the left side surface of the cover plate 1. The second limiting member 4c has a limiting groove, and the corresponding first limiting member 4a has a matching limiting protrusion. In some embodiments, it can also be arranged such that the first limiting member 4a has a limiting groove and the second limiting member 4c has a limiting protrusion. Figure 19 shows Figure 18 A three-dimensional structure diagram of the first limiting member 4a and the second limiting member 4c in. In some embodiments, the limiting protrusion can be an angled wedge block. When the cover plate moves to the limiting position, it will stop moving forward. The wedge angle depends on the rotational movement angle of the cover plate lifting mechanism.

[0068] The limiting structure can include an opening position limiting structure and a closing position limiting structure. The opening position limiting structure and the closing position limiting structure can be one set or multiple sets. Multiple sets of limiting structures can better limit the movement of the cover plate 1 and improve stability. As Figures 9 - 13 shown, there are 2 sets of opening position limiting structures. The first limiting members of the opening position limiting structures are 7c and 7d disposed inside the outer shell 2, and 7c and 7d are disposed on the traveling direction of the cover plate 1 when switching from the closed state to the open state. The second limiting members of the opening position limiting structures are 7a and 7b disposed on the side of the cover plate close to the opening position; there are also 2 sets of closing position limiting structures. The first limiting members of the closing position limiting structures are 4a and 4b disposed inside the outer shell 2, and 4c and 4d are disposed on the traveling direction of the cover plate 1 when switching from the open state to the closed state. The second limiting members of the closing position limiting structures are 4c and 4d disposed on the side of the cover plate close to the closing position.

[0069] The limiting structure can also have other implementation manners. For example, the first limiting member and the second limiting member can also be matched by a magnetic attraction method. For example, the magnetic pole can be changed by changing the current direction, so as to realize the attraction or repulsion between the first limiting member and the second limiting member. Therefore, in some embodiments, the first limiting member can be not disposed in the traveling direction of the cover plate 1.

[0070] In some embodiments, the opening and closing device further includes a locking mechanism, and the locking mechanism is used to fix the cover plate 1 after the cover plate 1 moves to the closing position or the opening position.

[0071] Figure 20 A top view of the locking state of a locking mechanism is shown, Figure 21 shows Figure 20 A three-dimensional structure diagram of the part of the locking mechanism located inside the outer shell 2 in, Figure 22 shows Figure 21 A side view of the locking mechanism in, Figure 23 showsFigure 21 Rear view of the locking mechanism in the middle

[0072] As shown in the figure, the locking mechanism includes a latch rod 601 disposed inside the outer shell 2, a latch hole 611 correspondingly disposed on the cover plate 1, and a locking power component 610 for driving the latch rod 601 to insert into or withdraw from the latch hole 611. The latch rod 601 can be in any suitable shape such as a cylinder, a square column, a rectangular column, etc. The latch rod 610 in the figure is a square column. The cross-section of the latch hole 611 can be similar to and slightly larger than the cross-section shape of the latch rod 601. In some embodiments, chamfering can be performed on the end of the latch rod 601 inserted into the latch hole 611 to facilitate the insertion of the latch rod 601 into the latch hole 611. The locking power component 610 can be a hydraulic motor, a pneumatic motor, and / or a hydraulic cylinder, etc.

[0073] Figures 20 - 23 The locking mechanism shown in the middle further includes a latch rail 602, a latch rail base 603, a first pin shaft 604, a second crank 605, a second pin shaft 607, a first crank 608, and a locking power component base 609.

[0074] The latch rod 601 can slide in the latch rail 602. The latch rail 602 is fixed to the inside of the outer shell 2 through the rail base 603. The first pin shaft 604 is fixed to the latch rod 601, and the second crank 605 is connected to the first pin shaft 604 and can rotate around the first pin shaft 604. The second crank 605 and the first crank 608 are connected together through the second pin shaft 607. Both the first crank 608 and the second crank 605 can rotate around the second pin shaft 607.

[0075] The locking power component base 609 is disposed inside the outer shell 2, and the locking power component 610 (hydraulic motor or pneumatic motor) is installed on the locking power component base 609 and connected to the second crank 608. It can drive the second crank 608 to rotate. Due to the limitation of the latch rail 602, the rotation of the second crank 608 is converted into a linear motion of the latch rod 601, realizing the insertion or withdrawal of the latch rod 601 from the latch hole 611 on the cover plate 1.

[0076] The locking mechanism can also be realized by using other automatically detachable connection methods, such as the magnetic attraction method, etc.

[0077] In addition, in some embodiments, the cover plate 1 further includes a strengthening structure.

[0078] In some embodiments, the strengthening structure is a plurality of reinforcing ribs 102 disposed on the cover plate 1. As Figure 13 In the figure, there are multiple criss-crossing reinforcing ribs 102 on the cover plate 1, which can enhance the structural strength of the cover plate 1.

[0079] In some embodiments, the opening and closing device further includes a control device, which is used to control various mechanisms, especially various mechanisms with power components, such as moving mechanisms, lifting mechanisms, locking mechanisms, etc. Of course, in some embodiments, the control mechanism can also control other structures such as sliding structures and limit structures.

[0080] The control device can be arranged at an appropriate position in the ship that is convenient for operation, and the specific implementation method can be arranged according to the type of power components of the mechanism and / or structure that needs to be controlled. For example, if the power components of each mechanism are hydraulic motors, the control device can be a hydraulically operated valve group, and the valve group is connected to each power component through a hydraulic pipe. If the outer shell 2 includes an installation cabin, the hydraulic pipe can pass through the bulkhead of the installation cabin in a watertight manner and enter the installation cabin. If the power components of each mechanism are pneumatic motors, the control device can be a pneumatically operated valve group, and the valve group is connected to each power component through a compressed air pipe. If the outer shell 2 includes an installation cabin, the compressed air pipe can pass through the bulkhead of the installation cabin in a watertight manner and enter the installation cabin. If the types of power components of each mechanism are different, the control device can also adopt a variety of different control methods in a targeted manner.

[0081] In some embodiments, when the telescopic propeller A needs to be extended out of the housing 2, the closed position locking mechanism of the cover 1 is opened by the control device, and then the lifting mechanism and the moving mechanism are operated by the control device, and the cover 1 is separated from the closed position by the sliding structure, and moved in the first direction and the second direction, and lifted to a position with a certain height from the housing 2, and further moved in the first direction to the open position, and then the cover is fixed in the open position by the open position limiting structure and the open position locking mechanism. When the telescopic propeller A is retracted into the hull, the open position locking mechanism of the cover 1 is opened by the control device, and then the moving mechanism is operated by the control device, and the cover 1 is separated from the open position by the sliding structure, and moved in the first direction and the second direction to the closed position, and then the cover is fixed in the closed position by the closed position limiting structure and the closed position locking mechanism.

[0082] A person skilled in the art may understand and implement other changes to the disclosed embodiments by reading the specification, the disclosed contents, the drawings and the appended claims. In the claims, the wording "comprising" does not exclude other elements and steps, and the wording "a" or "an" does not exclude the plurality. In the practical application of this application, a part may perform the functions of multiple technical features cited in the claims. Any reference numerals in the claims should not be construed as limiting the scope.

Claims

1. An opening and closing device for a telescopic propeller of a ship, characterized in that, Comprising: A housing including an outlet through which the telescopic thruster extends; A cover plate having a closed state and an open state, which can cover the outlet when in the closed state and expose the outlet when in the open state; And A moving mechanism for moving the cover plate along a first direction so that the cover plate can be switched between the closed state and the open state.

2. The opening and closing device according to claim 1, characterized in that, The moving mechanism includes: At least two sets of moving power components arranged on both sides of the cover plate along the first direction for pushing or pulling the cover plate to move the cover plate along the first direction.

3. The opening and closing device according to claim 2, wherein At least one set of the moving power components is a winch, which includes a drum and a pulling rope. The pulling rope is connected to the cover plate and wound around the drum, and the winch pulls the pulling rope by rotating the drum, thereby driving the cover plate to move.

4. The opening and closing device according to claim 1, characterized in that The opening and closing device further includes a lifting mechanism for moving the cover plate in a second direction so that the cover plate can be flush with the housing when in the closed state and can be received into the housing when in the open state.

5. The opening and closing device according to claim 4, wherein The lifting mechanism includes: A lifting shaft provided on the cover plate; A lifting arm provided inside the housing. The lifting arm is movably connected to the lifting shaft and can lift the lifting shaft by rotating the lifting arm, so that the cover plate can move in the second direction; A lifting power component for driving the lifting arm to rotate.

6. The opening and closing device according to claim 1, characterized in that, The opening and closing device further includes a sliding structure, which includes: A sliding shaft provided on the cover plate; A sliding track provided inside the housing. The sliding shaft can slide along the sliding track to define the moving trajectory of the cover plate.

7. The opening and closing device according to claim 1, characterized in that, The opening and closing device further includes a limiting structure for restricting the cover plate from continuing to move after the cover plate moves to the closed position or the open position.

8. The opening and closing device according to claim 7, characterized in that, The limiting structure includes a first limiting component provided inside the housing and a second limiting component correspondingly provided on the side of the cover plate. The first limiting component or the second limiting component has a limiting groove, and the corresponding second limiting component or first limiting component has a matching limiting protrusion.

9. The opening and closing device according to claim 1, wherein, The opening and closing device further includes a locking mechanism for fixing the cover plate after the cover plate moves to the closed position or the open position.

10. The opening and closing device according to claim 9, characterized in that, The locking mechanism includes a latch rod provided inside the housing, a latch hole correspondingly provided on the cover plate, and a locking power component for driving the latch rod to insert into or withdraw from the latch hole.

11. The opening and closing device according to claim 1, characterized in that, The cover plate further includes a strengthening structure, which is a plurality of reinforcing ribs provided on the cover plate.

12. The opening and closing device according to any one of claims 1-11, characterized in that, The opening and closing device further includes a control device for controlling each mechanism.

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