A method for tying ship propeller blades

Abstract

The present invention provides a method for tying propeller blades of ships. Starting from the tying and hoisting of propeller blades of train roll-on / roll-off ships, a ring-shaped sling is used in conjunction with a clamp to complete the tying and hoisting of propeller blades of train roll-on / roll-off ships, thereby solving the problems of using multiple slings, inconsistent tying methods, and potential safety hazards in the traditional manual tying and hoisting of blades. Furthermore, by adjusting the sling load and the number of clamps, the propeller blade tying method provided by the present invention can also be applied to the tying and hoisting of propeller blades of various types of ships. The ship propeller blade tying method provided by the present invention has simple procedures, easy operation, and strong applicability. When used in conjunction with a clamp, the efficiency and safety of tying and hoisting of propeller blades are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ship manufacturing tooling, and in particular relates to a method for tying ship propeller blades. Background Art

[0002] A propeller is a power output device for ships. Generally, a single propeller unit includes four blades, a hub, and a propeller shaft. For ease of transportation, most propeller blades are supplied in bulk and installed on site. Traditional ship propeller blade hoisting generally uses a manual method to tie the blades with multiple slings and then hoist them. This method has many knots and is not easy to remove. The coordinated operation of multiple slings increases the risk of loosening and takes a long time to operate. In addition, due to differences in personnel operations, the tying methods of the blades are varied, resulting in a cumbersome and unstable tying process, which poses certain safety hazards. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for tying the propeller blades of a train roll-on / roll-off ship based on the lifting of the propeller blades of a train roll-on / roll-off ship, and uses an annular sling to complete the tying and lifting of a single blade of a train roll-on / roll-off ship. Furthermore, by replacing the annular slings with different loads and cooperating with the clamp, the above method is applicable to the tying and lifting of propeller blades of various types of ships, thereby improving the tying efficiency and reducing safety hazards while ensuring safety.

[0004] The object of the present invention is achieved through the following scheme: A method for tying a propeller blade of a ship, which completes the tying and hoisting of a single blade by using an annular sling, specifically comprising the following steps:

[0005] Step 1: Wrap the circular sling around the end of the propeller blade, and twist the two ends of the circular sling on the left and right sides of the propeller blade end in opposite directions until two opposite sling loops are formed at both ends of the sling;

[0006] Step 2: Move the sling ring on the left side of the propeller blade to the top of the propeller blade, tighten the sling ring on the left side of the propeller blade to tie the left side of the propeller blade end tightly;

[0007] Step 3: Move the sling ring on the right side of the propeller blade to the top of the propeller blade, pass it under the sling ring on the left side of the propeller blade, tighten the sling ring on the right side of the propeller blade to tie the right side of the propeller blade end tightly;

[0008] Step 4: Use the hook to lift the right sling ring of the propeller blade until the ring sling is completely tightened and the left sling ring intersects with the right sling ring at the top of the propeller blade;

[0009] Step 5: Lift the propeller blades slightly off the ground, lower and adjust the position of the circular sling so that the root of the propeller blades is parallel to the ground to complete the lashing.

[0010] Preferably, in step 4, after the annular sling is completely tightened, at least one clamp is installed at each end at both ends of the intersection where the left sling ring and the right sling ring intersect.

[0011] Preferably, in step 4, a bow-shaped clamp is used to fix the propeller blades. The bow-shaped clamp includes a bow clamp, a clamping screw and an operating handle. After the annular sling is completely tightened, the clamping screw is screwed into the bow clamp by rotating the operating handle to fix the bow clamp on the blade surface.

[0012] Preferably, in step 4, rubber gaskets are provided at the ends of the bow clamp and the compression screw of the bow clamp.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention uses only one annular sling to complete the tying and hoisting of ship propeller blades, and when hoisting blades of different weights and shapes, the tying can be completed by simply replacing the annular sling and clamp of the corresponding load. The tying method provided by the present invention is based on the tying of propeller blades of train roll-on / roll-off ships, and can be applied to the tying and hoisting of propeller blades of various ships. The tying method provided by the present invention has simple procedures, simple operation, strong applicability, and is used in conjunction with a clamp to improve the efficiency and safety of tying and hoisting of propeller blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the tying method of step 1 of the present invention;

[0016] Figure 2 This is a schematic diagram of the tying method of step 2 of the present invention;

[0017] Figure 3 This is a schematic diagram of the tying method of step 3 of the present invention;

[0018] Figure 4 This is a schematic diagram of the tying method of step 4 of the present invention;

[0019] Figure 5 A schematic diagram of binding with a clamp in an embodiment of the present invention;

[0020] Figure 6 It is a schematic diagram of the structure of the bow-shaped clamp in an embodiment of the present invention;

[0021] Figure 7 Schematic diagram of the structure of the bow-shaped clamp in the embodiment of the present invention.

[0022] In the figure, 1 is a bow clamp; 2 is a clamping screw; 3 is an operating handle; and 4 is a rubber gasket. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] A method for lashing propeller blades of a ship provided in the technical solution of the present invention comprises the following steps:

[0025] A method for lashing propeller blades of a ship, using an annular sling to complete the lashing and hoisting of a single propeller blade, specifically comprising the following steps:

[0026] Step 1: Figure 1 As shown, place the circular sling around the end of the propeller blade, and twist the ends of the circular sling on the left and right sides of the propeller blade end in opposite directions until two opposite sling loops are formed at both ends of the sling.

[0027] Step 2: If Figure 2 As shown, move the sling eye on the left side of the propeller blade to the top of the propeller blade, and tighten the sling eye on the left side of the propeller blade to tie the left side of the propeller blade end tightly.

[0028] Step 3: If Figure 3 As shown, move the sling ring on the right side of the propeller blade to the top of the propeller blade, pass it under the sling ring on the left side of the propeller blade, and tighten the sling ring on the right side of the propeller blade to tie the right side of the propeller blade end tightly.

[0029] Step 4: Figure 4 As shown, use the hook to lift the right side sling eye of the propeller blade until the ring sling is fully tightened and the left side sling eye intersects with the right side sling eye at the top of the propeller blade.

[0030] Step 5: Lift the propeller blades slightly off the ground, lower and adjust the position of the circular sling so that the root of the propeller blades is parallel to the ground to complete the lashing.

[0031] like Figure 5 As shown, in some embodiments of the present invention, in step 4, after the annular sling is completely tightened, a bow-shaped clamp is installed at each end of the intersection where the left sling ring and the right sling ring intersect to enhance the stability of the blade binding and lifting.

[0032] like Figure 6As shown, the bow clamp includes a bow clamp 1, a clamping screw 2 and an operating handle 3. After the annular sling is completely tightened, the clamping screw 2 is screwed into the bow clamp 1 by rotating the operating handle 3, so that the bow clamp is fixed on the surface of the blade.

[0033] like Figure 7 As shown, in some embodiments of the present invention, rubber pads 4 are provided at the ends of the bow clamp 1 and the pressing screw 2 of the bow clamp. After the annular sling is completely tightened, the operating handle 3 is rotated to screw the pressing screw 2 into the bow clamp 1, so that the bow clamp is fixed on the surface of the blade. The rubber pad 4 provides friction between the bow clamp and the blade, and at the same time, the soft property of rubber can protect the copper blade, thereby avoiding direct contact between the steel bow clamp and the copper blade.

[0034] In some embodiments of the present invention, multiple bow-shaped clamps are installed at both ends of the intersection of the left and right sling rings to perform the lifting work of the propeller blades. The installation of multiple bow-shaped clamps can further enhance the fixing effect of the propeller blades and meet the lifting work of large-sized propeller blades.

[0035] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for lashing propeller blades of a ship, characterized in that: The lashing method uses an annular sling to complete the lashing of the propeller blades of the ship, and specifically includes the following steps: Step 1: Wrap the annular sling around the end of the propeller blade, and twist the two ends of the annular sling on the left and right sides of the end of the propeller blade in opposite directions until two opposite sling loops are formed at the two ends of the annular sling; Step 2: Move the sling ring on the left side of the propeller blade to the top of the propeller blade, tighten the sling ring on the left side of the propeller blade to tie the left side of the propeller blade end; Step 3: Move the sling ring on the right side of the propeller blade to the top of the propeller blade, pass it from below the sling ring on the left side of the propeller blade, tighten the sling ring on the right side of the propeller blade to tie the right side of the end of the propeller blade tightly; Step 4: Use a hook to lift the right sling ring of the propeller blade until the annular sling is completely tightened and the left sling ring of the propeller blade intersects with the right sling ring of the propeller blade at the top of the propeller blade; Step 5: Lift the propeller blade slightly off the ground, lower and adjust the position of the annular sling so that the root of the propeller blade is parallel to the ground, and complete the tying.

2. A method for lashing ship propeller blades according to claim 1, characterized in that: In step 4, after the annular sling is completely tightened, at least one clamp is installed at each end at both ends of the intersection where the sling ring on the left side of the propeller blade intersects with the sling ring on the right side of the propeller blade.

3. A method for lashing ship propeller blades according to claim 2, characterized in that: The clamp is a bow-shaped clamp, comprising a bow-shaped clamp (1), a clamping screw (2) and an operating handle (3). After the annular sling is completely tightened, the clamping screw (2) is screwed into the bow-shaped clamp (1) by rotating the operating handle (3), so that the bow-shaped clamp is fixed on the surface of the propeller blade.

4. A method for lashing ship propeller blades as claimed in claim 3, characterized in that: Rubber gaskets (4) are arranged at the ends of the bow clamp (1) and the pressing screw (2) of the bow clamp.

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