Underwater inspection structure for hinged rudder systems

Abstract

The present application belongs to the ship technical field, disclose a kind of hinge rudder system underwater inspection structure, including rudder, cover plate, seat plate and hinged unit, rudder is equipped with inspection hole, the outside of cover plate is flush with the outside of rudder, the edge of cover plate is circumferentially spaced and is equipped with multiple notches, seat plate is equipped with multiple and is connected to cover plate, seat plate is embedded in notch one by one, the cross-sectional shape of seat plate is same with the shape of notch, the outside of seat plate does not exceed the outside of cover plate, seat plate can be detachably connected rudder by fixing piece, the both ends of fixing piece along its length direction do not exceed the outside of cover plate, avoid adversely affecting to rudder system operating performance, prevent cavitation corrosion of rudder system;Hinged unit includes hinged seat and hinged arm, hinged seat is set to the inside of rudder, one end of hinged arm is hinged to hinged seat, the other end is connected to the inside of cover plate, cover plate is rotatably connected to rudder by hinged unit, when opening inspection hole, cover plate does not need to be completely removed, and staff can be completed separately.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to an underwater inspection structure for a hinged rudder system. Background Technology

[0002] The rudder system is a crucial piece of equipment ensuring the normal navigation of a ship. Therefore, strict requirements govern its inspection, necessitating an annual underwater inspection. Specifically, the inspection performed while the ship is afloat is called the underwater inspection. The underwater inspection of the rudder system includes: checking the bearing clearances of the rudder stock and rudder pin, checking for looseness in the rudder stock bushings and bushings, and checking for looseness in the rudder pin bushings and bushings. The underwater inspection is conducted by divers who enter the rudder blade sideways through an inspection hole on the rudder blade and use specialized measuring tools. To prevent water from entering the rudder blade through the inspection hole during navigation, which could affect the rudder system's maneuverability, a cover must be installed on the inspection hole.

[0003] The existing manhole cover is a common type, requiring two people to open and close it, which is inconvenient and unsafe. Furthermore, the connection between the cover and the inspection hole is a common bolt connection, with the bolt heads protruding from the rudder blade plate, increasing water flow resistance. At the same time, water can easily enter through the gaps in the cover installation, which adversely affects the rudder system's handling performance and can also cause cavitation corrosion of the rudder system, thereby damaging the rudder blade.

[0004] Therefore, there is an urgent need for a device to solve at least one of the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a hinged rudder system underwater inspection structure, which allows personnel to open and close the cover independently without affecting the performance of the rudder system.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The underwater inspection structure for the hinged rudder system includes:

[0008] The rudder blade has an inspection hole that penetrates through it.

[0009] A cover plate, the outer side of which is flush with the outer side of the rudder blade, and the edge of the cover plate is provided with multiple notches spaced apart circumferentially.

[0010] The seat plate is provided with multiple seat plates and is connected to the cover plate. The seat plates are embedded in the notches one by one. The cross-sectional shape of the seat plate is the same as the shape of the notches. The outer side of the seat plate does not extend beyond the outer side of the cover plate. The seat plate can be detachably connected to the rudder blade by a fastener. Both ends of the fastener along its length do not extend beyond the outer side of the cover plate.

[0011] The hinge unit includes a hinge seat and a hinge arm. The hinge seat is disposed on the inner side of the rudder blade, and one end of the hinge arm is hinged to the hinge seat, while the other end is connected to the inner side of the cover plate.

[0012] Preferably, the edge of the cover plate has a first gap between it and the wall of the inspection hole, a sealing plate is provided on the inner side of the rudder blade, the sealing plate is arranged circumferentially along the inspection hole, and the sealing plate can seal the first gap, and the seat plate is connected to the sealing plate through the fastener.

[0013] Preferably, the articulated arm is bent in a direction away from the cover plate and / or the rudder blade.

[0014] Preferably, the base plate has a first screw hole, and the sealing plate has a plurality of second screw holes spaced apart. The plurality of second screw holes correspond one-to-one with the plurality of first screw holes on the base plate. The fastener passes through the first screw hole and its corresponding second screw hole to connect the base plate and the sealing plate.

[0015] Preferably, the hinge base includes a connector and two opposing hinge plates, the hinge plates being spaced apart and connected to the inner side of the rudder blade, the connector being connected between the two hinge plates, and one end of the hinge arm being rotatably connected to the connector.

[0016] Preferably, the hinge unit further includes two washers, both of which are fitted onto the connector, with one washer sandwiched between the hinge arm and one of the hinge plates, and the other washer sandwiched between the hinge arm and the other hinge plate.

[0017] Preferably, there are two hinge units, with the hinge seats of the two hinge units being connected at intervals to the inner side of the cover plate, and the other ends of the hinge arms of the two hinge units being connected at intervals to the inner side of the rudder blade, and the connecting members of the two hinge units being parallel.

[0018] Preferably, the seat plate is welded to the cover plate.

[0019] Preferably, the other end of the hinge arm is connected to the middle part of the cover plate.

[0020] Preferably, the profile of the cover plate is the same as that of the rudder blade.

[0021] Beneficial Effects: This invention provides a hinged rudder system underwater inspection structure, including a rudder blade, a cover plate, a base plate, and a hinge unit. The rudder blade has an inspection hole that penetrates through it. The outer side of the cover plate is flush with the outer side of the rudder blade. Multiple notches are spaced circumferentially along the edge of the cover plate, penetrating the cover plate along its thickness. Multiple base plates are provided and connected to the cover plate, each corresponding to a notch. The cross-sectional shape of the base plate is the same as the shape of the notch, and the inner side of the base plate is flush with the inner side of the cover plate. The outer side of the base plate does not exceed... On the outside of the cover plate, the seat plate can be detachably connected to the rudder blade via a fastener, and both ends of the fastener along its length do not extend beyond the outside of the cover plate to avoid adverse effects on the rudder system's handling performance and prevent cavitation corrosion of the rudder system; the hinge unit includes a hinge seat and a hinge arm. The hinge seat is located on the inside of the rudder blade, and one end of the hinge arm is hinged to the hinge seat, while the other end is connected to the inside of the cover plate. The cover plate is rotatably connected to the rudder blade via the hinge unit. When opening the inspection hole, it is not necessary to completely remove the cover plate, and the operator can complete the task independently. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the underwater inspection structure of the hinged rudder system provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the opening and closing of the hinged rudder system underwater inspection structure provided in an embodiment of the present invention;

[0024] Figure 3 yes Figure 1 Sectional view of AA;

[0025] Figure 4 yes Figure 1 BB section view.

[0026] In the picture:

[0027] 1. Rudder blade; 11. Inspection hole; 2. Cover plate; 21. Notch; 311. Connector; 312. Hinge plate; 32. Hinge arm; 33. Washer; 4. Seat plate; 5. Sealing plate; 6. Fixture. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0029] In the description of this invention, unless otherwise explicitly 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.

[0030] In this invention, unless otherwise explicitly 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 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 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.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0032] This embodiment provides a hinged rudder system underwater inspection structure, which is simple to operate and safe to use. The operator can open and close the cover plate 2 independently without affecting the handling performance of the rudder system or causing cavitation corrosion of the rudder system.

[0033] Specifically, such as Figure 1 As shown, the hinged rudder system underwater inspection structure includes a rudder blade 1 and a cover plate 2. The rudder blade 1 has an inspection hole 11 that extends through the rudder blade 1 along its thickness direction, allowing personnel to enter the interior of the rudder blade 1 through the inspection hole 11. The cover plate 2 is used to cover at least part of the inspection hole 11. The cover plate 2 is rotatably connected to the rudder blade 1 via a hinge unit. When opening the inspection hole 11, it is not necessary to completely remove the cover plate 2, and the personnel can complete the task independently.

[0034] Preferably, the profile and material of the cover plate 2 are the same as those of the rudder blade 1 to reduce water flow resistance. More preferably, the thickness of the cover plate 2 is the same as that of the rudder blade 1.

[0035] Preferably, such as Figure 4 As shown, the hinge unit includes a hinge base and a hinge arm 32. The hinge base is disposed inside the rudder blade 1. One end of the hinge arm 32 is hinged to the hinge base, and the other end is connected to the inside of the cover plate 2. Specifically, the hinge base includes a connector 311 and two opposing hinge plates 312. The two hinge plates 312 are spaced apart and connected to the inside of the rudder blade 1. The connector 311 is connected between the two hinge plates 312. The connector 311 is sleeved on one end of the hinge arm 32 so that the hinge arm 32 is rotatably connected to the connector 311.

[0036] Preferably, the other end of the hinge arm 32 is connected to the middle part of the cover plate 2 so that the cover plate 2 can rotate to open / close the inspection hole 11.

[0037] Optionally, the hinge unit also includes two washers 33, both of which are fitted onto the connector 311. One of the washers 33 is sandwiched between the hinge arm 32 and one of the hinge plates 312, and the other washer 33 is sandwiched between the hinge arm 32 and the other hinge plate 312, so as to improve the stability of the rotation of the hinge arm 32 and prevent it from shaking.

[0038] Furthermore, the two hinge plates 312 are respectively provided with a first hole and a second hole, and the hinge arm 32 is provided with a third hole. The connector 311 passes through the first hole, the third hole, and the second hole in sequence to connect the hinge arm 32 and the two hinge plates 312, and is fixed by a nut. Optionally, the connector 311 is a bolt, and the nut has nut grooves on opposite sides. The bolt has a through hole. A cotter pin is inserted into the nut groove, the through hole, and the other nut groove in sequence, and the tail of the cotter pin is pried open to prevent relative rotation between the nut and the bolt, thereby improving the reliability of the connection.

[0039] Preferably, such as Figure 2 As shown, in this embodiment, the hinge arm 32 is bent in a direction away from the cover plate 2 and / or the rudder blade 1 to provide rotation space for the hinge arm 32, so that the cover plate 2 can be opened outward to ensure that the inspection hole 11 can be opened.

[0040] In this embodiment, two hinge units are provided. Specifically, the hinge seats in the two hinge units are connected to the inner side of the cover plate 2 at intervals, and the other ends of the hinge arms 32 in the two hinge units are connected to the inner side of the rudder blade 1 at intervals. It should be noted that the connectors 311 in the two hinge units are parallel so that the rotation directions of the two hinge arms 32 are consistent. Pushing the cover plate 2 can make the two hinge arms 32 rotate synchronously to open or close the inspection hole 11.

[0041] like Figures 1-3As shown, in this embodiment, the cover plate 2 has multiple notches 21 spaced apart circumferentially. The notches 21 penetrate the cover plate 2 along its thickness direction, and each notch 21 is fitted with a corresponding seat plate 4, which is connected to the cover plate 2. Specifically, the cross-sectional shape of the seat plate 4 is the same as that of the notch 21. To facilitate sealing, the inner side of the seat plate 4 is flush with the inner side of the cover plate 2. To avoid increasing the resistance of the water flow, the outer side of the seat plate 4 does not extend beyond the outer side of the cover plate 2. Furthermore, the seat plate 4 can be detachably connected to the rudder blade 1 through a fixing member 6, and both ends of the fixing member 6 along its length direction do not extend beyond the outer side of the cover plate 2, so as to avoid adversely affecting the steering performance of the rudder system and prevent cavitation corrosion of the rudder system.

[0042] Optionally, the seat plate 4 is welded to the cover plate 2 to ensure the connection strength between the seat plate 4 and the cover plate 2.

[0043] Preferably, there is a first gap between the edge of the cover plate 2 and the wall of the inspection hole 11, so as to facilitate the rotation and opening of the cover plate 2. A sealing plate 5 is provided on the inner side of the rudder blade 1. The sealing plate 5 is arranged around the inspection hole 11 and can seal the first gap to prevent water from entering the interior of the rudder blade 1 through the first gap, thus preventing the water from adversely affecting the rudder system's handling performance.

[0044] Furthermore, the base plate 4 has a first screw hole, and the sealing plate 5 has a plurality of second screw holes spaced apart. The plurality of second screw holes correspond one-to-one with the plurality of first screw holes on the base plate 4. A fastener 6 is used to pass through the first screw hole and its corresponding second screw hole to connect the base plate 4 and the sealing plate 5, thereby indirectly forming a connection between the cover plate 2 and the rudder blade 1.

[0045] It should be noted that the fastener 6 is a bolt, and the stud head and stud tail of the bolt do not extend beyond the outer side of the cover plate 2.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A hinged rudder system underwater inspection structure, characterized in that, include: A rudder blade (1) is provided with an inspection hole (11) that penetrates the rudder blade (1). Cover plate (2), the outer side of the cover plate (2) is flush with the outer side of the rudder blade (1), and the edge of the cover plate (2) is provided with a plurality of notches (21) spaced apart circumferentially; Seat plate (4), the seat plate (4) is provided in multiple and is connected to the cover plate (2), the seat plate (4) is embedded in the notch (21) one by one, the cross-sectional shape of the seat plate (4) is the same as the shape of the notch (21), the outer side of the seat plate (4) does not extend beyond the outer side of the cover plate (2), the seat plate (4) can be detachably connected to the rudder blade (1) by a fastener (6), and both ends of the fastener (6) along its length direction do not extend beyond the outer side of the cover plate (2); The hinge unit includes a hinge seat and a hinge arm (32). The hinge seat is disposed on the inner side of the rudder blade (1). One end of the hinge arm (32) is hinged to the hinge seat, and the other end is connected to the inner side of the cover plate (2). The edge of the cover plate (2) has a first gap between it and the wall of the inspection hole (11). A sealing plate (5) is provided on the inner side of the rudder blade (1). The sealing plate (5) is arranged circumferentially along the inspection hole (11) and the sealing plate (5) can seal the first gap. The seat plate (4) is connected to the sealing plate (5) through the fastener (6). The hinge base includes a connector (311) and two opposing hinge plates (312). The hinge plates (312) are spaced apart and connected to the inner side of the rudder blade (1). The connector (311) is connected between the two hinge plates (312). One end of the hinge arm (32) is rotatably connected to the connector (311). The hinge unit also includes two washers (33), both of which are fitted onto the connector (311), and one of the washers (33) is sandwiched between the hinge arm (32) and one of the hinge plates (312), while the other washer (33) is sandwiched between the hinge arm (32) and the other hinge plate (312).

2. The underwater inspection structure for the hinged rudder system according to claim 1, characterized in that, The articulated arm (32) bends away from the cover plate (2) and / or the rudder blade (1).

3. The underwater inspection structure for the hinged rudder system according to claim 1, characterized in that, The seat plate (4) has a first screw hole, and the sealing plate (5) has a plurality of second screw holes spaced apart. The plurality of second screw holes correspond one-to-one with the plurality of first screw holes on the seat plate (4). The fixing member (6) passes through the first screw hole and its corresponding second screw hole to connect the seat plate (4) and the sealing plate (5).

4. The underwater inspection structure for the hinged rudder system according to claim 1, characterized in that, Two hinge units are provided. The hinge seats in the two hinge units are connected to the inner side of the cover plate (2) at intervals. The other end of the hinge arm (32) in the two hinge units is connected to the inner side of the rudder blade (1) at intervals. The connectors (311) in the two hinge units are parallel.

5. The underwater inspection structure for the hinged rudder system according to any one of claims 1-4, characterized in that, The seat plate (4) is welded to the cover plate (2).

6. The underwater inspection structure for the hinged rudder system according to any one of claims 1-4, characterized in that, The other end of the hinge arm (32) is connected to the middle part of the cover plate (2).

7. The underwater inspection structure for the hinged rudder system according to any one of claims 1-4, characterized in that, The profile of the cover plate (2) is the same as that of the rudder blade (1).

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