A rudder blade hoisting device and method

Abstract

This application discloses a rudder blade hoisting device and method. The rudder blade hoisting device includes a bracket frame, a top cover frame, and multiple pressure plate assemblies. The bracket frame is used to place the rudder blade. The top cover frame is detachably connected to the bracket frame, and multiple lifting lugs are provided on the top of the top cover frame. Some of the pressure plate assemblies are connected to the bottom and four sides of the bracket frame to support the bottom and sides of the rudder blade, while the other pressure plate assemblies are connected to the top cover frame to support the top of the rudder blade. By using pressure plate assemblies connected to the bottom of the bracket frame to support the bottom of the rudder blade, pressure plate assemblies connected to the four sides of the bracket frame to support the sides of the rudder blade, and pressure plate assemblies connected to the top cover frame to support the top of the rudder blade, the rudder blade is secured in all directions. Then, it is hoisted using the lifting lugs on the top of the top cover frame, achieving stable hoisting of the rudder blade with good stability and reliability.

Description

Technical Field

[0001] This application belongs to the field of ship assembly technology, specifically relating to a rudder blade hoisting device and method. Background Technology

[0002] The principle of a ship's rudder blade is that when a fluid of a certain velocity passes through the airfoil section of the rudder blade at a certain angle of attack, different pressures are generated on both sides of the airfoil, forming a deflection force. This provides the ship with deflection capability, enabling the ship to change direction along its path.

[0003] In the existing technology, when hoisting and transporting rudder blades, lifting lugs are generally welded to the surface of the rudder blades for hoisting. However, as the rudder blades are transformed from an all-metal molded structure to a molded structure with a metal frame covered by non-metallic composite materials, or even to an all-non-metallic composite molded structure, it is impossible to weld lifting lugs to the surface of the rudder blades, and therefore hoisting is not possible. Summary of the Invention

[0004] To address the technical problem in the prior art that lifting lugs cannot be welded for hoisting non-metallic composite rudder blades, this application provides a rudder blade hoisting device and method.

[0005] A first aspect of this application provides a rudder blade hoisting device, including a bracket frame, a top cover frame, and multiple pressure plate assemblies, wherein:

[0006] The bracket frame is used to house the rudder blade;

[0007] The upper cover frame is detachably connected to the bracket frame, and the top of the upper cover frame is provided with multiple lifting lugs;

[0008] Multiple pressure plate assemblies, some of which are connected to the bottom and four sides of the bracket frame to support the bottom and sides of the rudder blade, and other pressure plate assemblies are connected to the top cover frame to support the top of the rudder blade.

[0009] In some alternative embodiments, the pressure plate assembly includes a base, a screw, a fork-shaped member, and a pressure plate; the base is mounted on the bracket frame or the upper frame; the screw is threadedly connected to the base and the fork-shaped member respectively, and the distance between the fork-shaped member and the base is adjusted by the length of the screw screw screwed into the base and the fork-shaped member; the pressure plate is hinged to the fork-shaped member.

[0010] In some optional embodiments, the fork-shaped member is provided with a connecting groove along its width direction, and the fork-shaped member is provided with a first connecting hole that passes through the connecting groove; the pressure plate is provided with a connecting lug, the connecting lug is provided with a second connecting hole, the connecting lug is disposed in the connecting groove, and is connected by a pin passing through the first connecting hole and the second connecting hole, so that the connecting lug can rotate around the second connecting hole.

[0011] In some alternative embodiments, the longitudinal section of the connecting groove is V-shaped, and the side of the connecting groove along the circumferential direction of the first connecting hole can abut against the side of the connecting lug.

[0012] In some optional embodiments, reinforcing ribs are provided on both sides of the connecting ear seat, and a clearance groove is provided on the fork-shaped member, with the reinforcing ribs placed in the clearance groove.

[0013] In some alternative implementations, the width of the clearance groove is smaller than the width of the connecting groove.

[0014] In some alternative embodiments, the screw includes a smooth section and two threaded sections; the two threaded sections are located at both ends of the smooth section, and the two threaded ends are threadedly connected to the base and the fork-shaped member, respectively; two clamping grooves are symmetrically arranged on the smooth section.

[0015] In some alternative embodiments, the surface of the pressure plate is further connected to a first pad, which contacts the surface of the rudder blade.

[0016] In some alternative embodiments, the trailing edge of the rudder blade is knife-point shaped, and the rudder blade hoisting device further includes a protective element and a second pad, the protective element covering the trailing edge, the protective element being V-shaped, and the second pad being disposed between the protective element and the outer surface of the rudder blade.

[0017] A second aspect of this application provides a method for hoisting a rudder blade, using the rudder blade hoisting device described in the first aspect, comprising:

[0018] Based on the streamlined shape of the rudder blade surface, the initial height adjustment is performed on the pressure plate assembly located at the bottom of the bracket frame;

[0019] Place the rudder blade on the pressure plate assembly at the bottom of the bracket frame, and precisely adjust the height of the pressure plate assembly at the bottom of the bracket frame to make the rudder blade lie flat.

[0020] Adjust the pressure plate assembly located around the bracket frame to fit the rudder blade.

[0021] Connect the upper cover frame to the bracket frame, and adjust the pressure plate assembly on the upper cover frame to fit the top of the rudder blade.

[0022] The hoisting operation is carried out using the lifting lugs on the top cover frame.

[0023] A rudder blade hoisting device provided according to one or more embodiments of this application has the following advantages compared to the prior art:

[0024] By setting multiple pressure plate assemblies, the pressure plate assembly connected to the bottom of the bracket frame supports the bottom of the rudder blade, the pressure plate assembly connected to the four sides of the bracket frame supports the four sides of the rudder blade, and the pressure plate assembly connected to the top cover frame supports the top of the rudder blade, thus fixing the rudder blade in all directions. Then, it is hoisted by the lifting lugs on the top of the top cover frame, so as to achieve stable hoisting of the rudder blade with good stability and reliability. Attached Figure Description

[0025] Figure 1 A top view of the rudder blade hoisting device is shown in one or more embodiments of this application;

[0026] Figure 2 One or more embodiments of this application are shown. Figure 1 AA section view;

[0027] Figure 3 One or more embodiments of this application are shown. Figure 2 Enlarged view of part B in the middle;

[0028] Figure 4 A schematic diagram of the rudder blade structure of the rudder blade hoisting device is shown in one or more embodiments of this application;

[0029] Figure 5 An exploded view of the pressure plate assembly of the rudder blade hoisting device is shown in one or more embodiments of this application;

[0030] Figure 6 A cross-sectional view of the pressure plate assembly of the rudder blade hoisting device is shown in one or more embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 100-rudder blade, 101-covering structure, 102-side edge; 1-bracket frame; 2-upper cover frame; 3-pressure plate assembly, 31-base, 32-screw, 321-smooth rod section, 322-threaded section, 323-clamping groove, 33-fork-shaped part, 331-connecting groove, 332-first connecting hole, 333-clearance groove, 34-pressure plate, 35-connecting lug, 351-second connecting hole, 352-reinforcing rib, 36-pin, 37-first pad; 4-lifting lug; 5-protective component; 6-second pad. Detailed Implementation

[0032] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] Before introducing the embodiments, the composite material rudder blade 100 is described: The outer surface of the composite material rudder blade 100 has a non-metallic composite material covering structure 101, which is not suitable for collision and friction with hard and sharp objects or other solid surfaces. It is not allowed to use open flame welding to install detachable metal lifting lugs. In order to ensure that the outer surface of the composite material rudder blade 100 is smooth and maintains a teardrop shape, fixed lifting lugs cannot be used on the outer surface. At the same time, the outer surface of the composite material rudder blade 100 has the characteristic of low roughness, and its edge 102 has the structural feature of a knife tip. When using a sling binding method for operation, slippage is more likely to occur, causing the sling to break and the rudder blade 100 lifting operation to fail.

[0034] Please see Figures 1-6 According to a first aspect of this application, a rudder blade hoisting device is provided, including a bracket frame 1, an upper cover frame 2, and a plurality of pressure plate 34 assemblies 3, wherein:

[0035] The bracket frame 1 is used to hold the rudder blade 100;

[0036] The upper cover frame 2 is detachably connected to the bracket frame 1. The top of the upper cover frame 2 is provided with multiple lifting lugs 4. Lifting lugs 4 can be provided at the four corners of the top of the upper cover frame 2.

[0037] Multiple pressure plate assemblies 34, some of which are connected to the bottom and four sides of the bracket frame 1 to support the bottom and sides of the rudder blade 100, and the other pressure plate assemblies 34 are connected to the upper cover frame 2 to support the top of the rudder blade 100.

[0038] The bracket frame 1 and the upper cover frame 2 are assembled and welded from square tubes or channel steel. The layout structure of the square tubes or channel steel in the bracket frame 1 and the upper cover frame 2 can be determined according to the external dimensions and internal weight distribution of the rudder blade 100.

[0039] The rudder blade hoisting device provided in this application embodiment uses multiple pressure plate 34 components 3. The pressure plate 34 components 3 connected to the bottom of the bracket frame 1 support the bottom of the rudder blade 100, the pressure plate 34 components 3 connected to the four sides of the bracket frame 1 support the four sides of the rudder blade 100, and the pressure plate 34 components 3 connected to the upper cover frame 2 support the top of the rudder blade 100, thus fixing the rudder blade 100 in all directions. Then, it is hoisted by the lifting lugs 4 on the top of the upper cover frame 2, so as to achieve stable hoisting of the rudder blade 100 with good stability and reliability.

[0040] In some optional embodiments, the pressure plate 34 assembly 3 includes a base 31, a screw 32, a fork-shaped member 33, and a pressure plate 34; the base 31 is mounted on the bracket frame 1 or the upper frame, and the base 31 can be installed by welding; the screw 32 is threadedly connected to the base 31 and the fork-shaped member 33 respectively, and the distance between the fork-shaped member 33 and the base 31 is adjusted by the length of the screw 32 screwed into the base 31 and the fork-shaped member 33; the pressure plate 34 is hinged to the fork-shaped member 33. The screw 32 is threadedly connected to the base 31 and the fork-shaped member 33 respectively. Rotating the screw 32 can adjust the distance between the fork-shaped member 33 and the base 31. The fork-shaped member 33 is connected to the pressure plate 34, which can adjust the distance between the pressure plate 34 and the base 31, thereby adjusting the height of the pressure plate 34. The pressure plate 34 is hinged to the fork-shaped member 33, so that the pressure plate 34 can rotate at a certain angle, so that it can be supported and fixed vertically in a direction that almost achieves the 100° curvature surface of the rudder blade, resulting in better support and fixation.

[0041] In some optional embodiments, the fork-shaped member 33 is provided with a connecting groove 331 along its width direction, and the fork-shaped member 33 is provided with a first connecting hole 332 passing through the connecting groove 331; the pressure plate 34 is provided with a connecting lug 35, and the connecting lug 35 is provided with a second connecting hole 351. The connecting lug 35 is disposed in the connecting groove 331 and is connected by a pin 36 passing through the first connecting hole 332 and the second connecting hole 351, so that the connecting lug 35 can rotate around the axis of the second connecting hole 351. By disposing the connecting lug 35 in the connecting groove 331 and connecting it by a pin 36 passing through the first connecting hole 332 and the second connecting hole 351, the connecting lug 35 can rotate around the axis of the second connecting hole 351, allowing the pressure plate 34 to rotate at a certain angle, so that it can be supported and fixed vertically almost to the 100° curvature surface of the rudder blade, resulting in better support and fixation.

[0042] In some optional embodiments, the longitudinal section of the connecting groove 331 is V-shaped, and the side of the connecting groove 331 along the circumferential direction of the first connecting hole 332 can abut against the side of the connecting lug 35. The connecting lug 35 can rotate around the second connecting hole 351. When the connecting groove 331 abuts against one side of the connecting lug 35 along the circumferential direction of the first connecting hole 332, the connecting lug 35 is limited, so that the connecting lug 35 can rotate α angle to both sides along the center line of the connecting groove 331. α can be set to 10°.

[0043] In some optional embodiments, reinforcing ribs 352 are provided on both sides of the connecting lug 35, and a clearance groove 333 is provided on the fork-shaped member 33, with the reinforcing ribs 352 placed in the clearance groove 333. By providing reinforcing ribs 352 on both sides of the connecting lug 35, the strength of the connecting lug 35 is enhanced. To prevent the reinforcing ribs 352 from interfering with the side of the connecting groove 331 during the rotation of the connecting lug 35, a clearance groove 333 is provided on the fork-shaped member 33. The clearance groove 333 extends through the thickness direction of the fork-shaped member 33. The reinforcing ribs 352 placed in the clearance groove 333 do not affect the rotation of the connecting lug 35, while providing a certain end-face limiting effect on the rotation of the connecting lug 35, thus improving the reliability and stability of the device.

[0044] In some optional embodiments, the width of the clearance groove 333 is smaller than the width of the connecting groove 331. By making the width of the clearance groove 333 smaller than the width of the connecting groove 331, the connecting lug 35 is prevented from sliding out of the clearance groove 333 and losing its limiting function, thereby improving the reliability of the device.

[0045] In some optional embodiments, the screw 32 includes a smooth section 321 and two threaded sections 322; the two threaded sections 322 are located at both ends of the smooth section 321, and the two threaded ends are threadedly connected to the base 31 and the fork-shaped member 33, respectively; two clamping grooves 323 are symmetrically arranged on the smooth section 321. By symmetrically providing two clamping grooves 323 on the smooth section 321, the clamping grooves 323 being flat notches, and using an adjustable wrench to clamp the two clamping grooves 323, the smooth section 321 can be easily rotated, thereby adjusting the length of the threaded sections 322 screwed into the base 31 and the fork-shaped member 33, and thus adjusting the distance between the base 31 and the fork-shaped member 33.

[0046] In some optional embodiments, a first pad 37 is also connected to the surface of the pressure plate 34, and the first pad 37 contacts the surface of the rudder blade 100. By setting the first pad 37 on the surface of the pressure plate 34, the first pad 37, made of a soft material, and in contact with the surface of the rudder blade 100, can provide cushioning and vibration damping protection for the surface of the rudder blade 100. The first pad 37 can be made of cushioning materials such as rubber, silicone, and foam, and is connected to the pressure plate 34 by adhesive bonding.

[0047] In some optional embodiments, the trailing edge 102 of the rudder blade 100 is blade-tipped. The rudder blade hoisting device further includes a protective element 5 and a second pad 6. The protective element 5 covers the trailing edge 102 and is V-shaped. The second pad 6 is disposed between the protective element 5 and the outer surface of the rudder blade 100. The trailing edge 102 is a marine engineering term published in 1998, referring to the trailing edge of a propeller blade when propelling a ship forward. By having the protective element 5 cover the trailing edge 102 and the second pad 6 disposed between the protective element 5 and the outer surface of the rudder blade 100, the second pad 6, made of a soft material, prevents the sharp edge 102 from directly contacting and bearing force with the pressure plate 34 assembly 3, thus avoiding damage due to excessive force and improving the reliability of the device. The second pad 6 can be made of cushioning materials such as rubber, silicone, and foam, and is bonded to the surfaces of the protective element 5 and the rudder blade 100 by adhesive.

[0048] A second aspect of this application provides a method for hoisting a rudder blade 100, using the rudder blade hoisting device described in the first aspect embodiment, including:

[0049] Based on the streamlined shape of the rudder blade 100, the initial height adjustment is performed on the pressure plate 34 assembly 3 located at the bottom of the bracket frame 1;

[0050] Place the rudder blade 100 on the pressure plate 34 assembly 3 at the bottom of the bracket frame 1, and make precise height adjustments to the pressure plate 34 assembly 3 at the bottom of the bracket frame 1 so that the rudder blade 100 is in a flat position.

[0051] Adjust the pressure plate 34 assembly 3 located around the bracket frame 1 so that it fits around the rudder blade 100;

[0052] Connect the upper cover frame 2 to the bracket frame 1, and adjust the pressure plate 34 assembly 3 on the upper cover frame 2 to fit the top of the rudder blade 100.

[0053] The hoisting operation is carried out using the lifting lugs 4 on the upper frame 2.

[0054] The rudder blade 100 hoisting method provided in this application embodiment supports the bottom of the rudder blade 100 by means of a pressure plate 34 assembly 3 connected to the bottom of the bracket frame 1, a pressure plate 34 assembly 3 connected to the four sides of the bracket frame 1 supporting the four sides of the rudder blade 100, and a pressure plate 34 assembly 3 connected to the upper cover frame 2 supporting the top of the rudder blade 100, thereby fixing the rudder blade 100 in all directions. Then, it is hoisted by means of a lifting lug 4 on the top of the upper cover frame 2, so as to achieve stable hoisting of the rudder blade 100 with good stability and reliability.

[0055] 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.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, 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 this application.

[0057] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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 application according to the specific circumstances.

[0058] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0059] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for hoisting a rudder blade, using a rudder blade hoisting device, characterized in that, The rudder blade hoisting device includes a bracket frame, an upper cover frame, and multiple pressure plate assemblies, wherein: The bracket frame is used to house the rudder blade; The upper cover frame is detachably connected to the bracket frame, and the top of the upper cover frame is provided with multiple lifting lugs; Multiple pressure plate assemblies, some of the pressure plate assemblies are connected to the bottom and four sides of the bracket frame to support the bottom and sides of the rudder blade, and the other pressure plate assemblies are connected to the top cover frame to support the top of the rudder blade; The pressure plate assembly includes a base, a screw, a fork-shaped component, and a pressure plate; the base is mounted on the bracket frame or the upper cover frame; the screw is threadedly connected to the base and the fork-shaped component respectively, and the distance between the fork-shaped component and the base is adjusted by the length of the screw screw screwed into the base and the fork-shaped component; the pressure plate is hinged to the fork-shaped component; The fork-shaped component has a connecting groove along its width and a first connecting hole that passes through the connecting groove. The pressure plate has a connecting lug and a second connecting hole. The connecting lug is located in the connecting groove and is connected by a pin passing through the first connecting hole and the second connecting hole, so that the connecting lug can rotate around the second connecting hole. The method for hoisting the rudder blade includes: Based on the streamlined shape of the rudder blade surface, the initial height adjustment is performed on the pressure plate assembly located at the bottom of the bracket frame; Place the rudder blade on the pressure plate assembly at the bottom of the bracket frame, and precisely adjust the height of the pressure plate assembly at the bottom of the bracket frame to make the rudder blade lie flat. Adjust the pressure plate assembly located around the bracket frame to fit the rudder blade. Connect the upper cover frame to the bracket frame, and adjust the pressure plate assembly on the upper cover frame to fit the top of the rudder blade. The hoisting operation is carried out using the lifting lugs on the top cover frame.

2. The rudder blade hoisting method according to claim 1, characterized in that, The longitudinal section of the connecting groove is V-shaped, and the side of the connecting groove along the circumferential direction of the first connecting hole can abut against the side of the connecting lug.

3. The rudder blade hoisting method according to claim 2, characterized in that, The connecting ear seat has reinforcing ribs on both sides, and the fork-shaped part has a clearance groove, with the reinforcing ribs placed in the clearance groove.

4. The rudder blade hoisting method according to claim 3, characterized in that, The width of the clearance groove is smaller than the width of the connecting groove.

5. The rudder blade hoisting method according to claim 1, characterized in that, The screw includes a smooth section and two threaded sections; the two threaded sections are located at both ends of the smooth section, and the two threaded sections are threadedly connected to the base and the fork-shaped component, respectively; two clamping grooves are symmetrically arranged on the smooth section.

6. The rudder blade hoisting method according to claim 1, characterized in that, The surface of the pressure plate is also connected to a first pad, which is in contact with the surface of the rudder blade.

7. The rudder blade hoisting method according to any one of claims 1-6, characterized in that, The trailing edge of the rudder blade is knife-point shaped. The rudder blade hoisting device also includes a protective component and a second pad. The protective component covers the trailing edge and is V-shaped. The second pad is disposed between the protective component and the outer surface of the rudder blade.

Images