A method for tying and hoisting adjustable propeller blades

Abstract

The present invention relates to a method for binding and hoisting adjustable-paddle blades. The method for binding and hoisting adjustable-paddle blades described in the present invention comprises: selecting a lifting sling → marking the blade binding point → dividing the lifting sling into sections A and B → binding section A according to the blade marking point → binding section B according to the blade marking point → adjusting the stability of the blade. The method for binding and hoisting adjustable-paddle blades described in the present invention uses a lifting sling to complete the fixed positioning and hoisting of the adjustable-paddle blades, avoiding the use of a clamp for fixing, is simple to operate, and improves the efficiency of the blade hoisting operation.

Description

Technical Field

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

[0002] The propeller with adjustable pitch is called adjustable propeller. The shape and structure of adjustable propeller blades are special. A single propeller blade is heavy, and some propeller blades can weigh up to 8 tons. The blade edge is curved, and some blades have special lifting holes, but they are relatively rare. When disassembling the adjustable propeller for repair or maintenance, the adjustable propeller needs to be lifted, and the lifting requires operations such as tying and clamping the adjustable propeller.

[0003] However, the existing binding and clamp fixing methods are complicated and cumbersome to use, difficult to operate, and inefficient. Summary of the invention

[0004] Based on this, the object of the present invention is to provide a method for tying and hoisting adjustable-pitch propeller blades, which utilizes a lifting sling to tie the adjustable-pitch propeller blades, and has the advantages of simple operation and high efficiency.

[0005] A method for tying and hoisting an adjustable propeller blade comprises the following steps:

[0006] Choose a lifting sling;

[0007] Define the front and back of the blade and mark the binding points C, D, and E on the outer edge of the blade in sequence, with point C on the upper part of the blade and points D and E on both sides of the blade root chassis;

[0008] Divide the lifting belt into two equal parts, A and B. Place the middle of the lifting belt on point C of the blade. Then move section A of the lifting belt from point C around the back of the blade to point D.

[0009] Then attach section A of the lifting strap from point D around the front of the blade to point E;

[0010] Finally, pass section A of the lifting belt around the back of the blade from point E and pass between the lifting belt and the blade to point C and then move vertically upwards;

[0011] Pass section B of the lifting strap from point C through the front of the blade to point D;

[0012] Then attach section B of the lifting strap from point D around the back of the blade to point E;

[0013] Finally, pass the B section of the lifting belt from point E around the front of the blade and pass between the lifting belt and the blade to point C and then move it vertically upwards;

[0014] Lift the blades and adjust the binding points to achieve stable lifting. Compared with the prior art, the adjustable-pitch blade binding and lifting method of the present invention only uses a lifting sling to complete the fixed positioning and lifting of the adjustable-pitch blades, avoiding the use of clamps for fixing, and is simple to operate, thereby improving the efficiency of blade lifting operations.

[0015] Furthermore, the lifting sling has buckles at both ends. Using the lifting sling with buckles at both ends makes lifting more convenient.

[0016] Furthermore, the lifting force of the lifting sling is greater than half of the weight of the blade, so as to ensure that the lifting sling does not break when lifting the blade, thereby ensuring the safety of the operation.

[0017] Furthermore, the length of the lifting sling is greater than twice the length required for the A section or the B section to sequentially wrap around the points C, D, E, and C. The lifting sling has sufficient length to avoid repeated operations and improve efficiency.

[0018] Furthermore, the lifting belt is wrapped with multiple layers of cloth strips at the positions where the edges and corners of the blades contact the lifting belt, so as to prevent the lifting belt from being cut by the sharp edges and corners of the blades.

[0019] Furthermore, the binding point adjusted to achieve hoisting stability is point C. Point C is perpendicular to the crane at the upper part of the blade, and adjusting point C to adjust hoisting stability is the most convenient and easy to operate.

[0020] Furthermore, the method for adjusting the binding point C is to move the position of the point C where the lifting belt section A and section B intersect upward or downward along the edge of the blade until the blade reaches the lifting stability. The stability of the lifted blade is adjusted to make the lifting process safer.

[0021] Furthermore, the basis for the stable hoisting is that when the blade is hoisted, its blade root chassis is consistent with the horizontal line. Using the blade root chassis and the horizontal line as the judgment standard is more intuitive and makes the operation simpler and more convenient.

[0022] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front state of the lifting sling 1 and the blade 2 according to an embodiment of the present invention;

[0024] Figure 2 It is a state diagram of the A section of the lifting sling 1 of the embodiment of the present invention when it is at point D;

[0025] Figure 3 It is a state diagram of the A section of the lifting sling 1 according to the embodiment of the present invention when it is at point E;

[0026] Figure 4 This is a state diagram of the lifting sling 1 of the embodiment of the present invention when the A section is tied at the C point;

[0027] Figure 5 It is a state diagram of the B section of the lifting sling 1 of the embodiment of the present invention when it is at point D;

[0028] Figure 6 It is a state diagram of the B section of the lifting sling 1 of the embodiment of the present invention when it is at point E;

[0029] Figure 7 This is a state diagram of the lifting sling 1 of the embodiment of the present invention when the B section is tied at the C point;

[0030] Figure 8 It is a schematic diagram of adjusting the position of point C of the lifting sling 1 according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] Example

[0033] A method for tying and hoisting an adjustable-paddle blade of the present invention comprises the following steps:

[0034] Step 1): See Figure 1 According to the weight of the blade 2, a lifting sling 1 is selected, and there are buckles 10 at both ends of the lifting sling 1; the maximum lifting force of the lifting sling 1 must be greater than half of the weight of the blade. In this embodiment, when the blade weighs 8 tons, a lifting sling with a force of 5 tons can be selected, which can lift an object weighing 10 tons.

[0035] Step 2): See Figure 1 , define the front and back sides of blade 2, Figure 1 When the blade 2 is facing forward, the binding points C, D, and E are marked on the outer edge of the blade 2 in sequence, wherein point C is at the upper part of the blade, and points D and E are at both sides of the blade root chassis. In this embodiment, as a preferred method, point D is at the lower part of the blade, and point E is in the middle of the blade.

[0036] Step 3): See Figure 2, divide the lifting sling 1 into two equal sections, A and B, place the middle position of the lifting sling 1 on point C of the blade 2, and move section A of the lifting sling 1 from point C around the back of the blade 2 to point D.

[0037] Step 4): See Figure 3 , then connect section A of the lifting strap 1 from point D around the front of blade 2 to point E.

[0038] Step 5): See Figure 4 Finally, pass section A of the lifting sling 1 from point E around the back of the blade 2 and pass between the lifting sling and the blade to point C and then move vertically upward.

[0039] Step 6): See Figure 5 , move section B of the lifting sling 1 from point C through the front of blade 2 to point D.

[0040] Step 7): See Figure 6 , then connect section B of the lifting strap 1 from point D around the back of blade 2 to point E.

[0041] Step 8): See Figure 7 Finally, pass the B section of the lifting sling 1 from point E around the front of the blade 2 and pass between the lifting sling and the blade to point C and then move vertically upward.

[0042] Step 9): See Figure 8 When blade 2 is lifted off the ground and is unstable, blade 2 can be lowered and the position of point C can be adjusted to move toward point F or point G, with point F below point C and point G above point C, until the blade root chassis 20 of blade 2 is aligned with the horizontal line.

[0043] For blades with thin or sharp edges in steps 3) to 8, use multiple layers of cloth strips to wrap the lifting straps at the corners where the lifting straps and blades are tied in the above steps.

[0044] The hoisting method is simple to operate, safe, and efficient, and is convenient and quick to hoist the adjustable-pitch propeller blades, thereby improving the operating efficiency of the adjustable-pitch propeller blade hoisting.

[0045] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A method for tying and hoisting adjustable propeller blades, characterized in that: The following steps are involved: Choose a lifting sling; Define the front and back of the blade and mark the binding points C, D, and E on the outer edge of the blade in sequence, with point C on the upper part of the blade and points D and E on both sides of the blade root chassis; Divide the lifting belt into two equal parts, A and B. Place the middle of the lifting belt on point C of the blade. Then pass section A of the lifting belt from point C around the back of the blade to point D. Then attach section A of the lifting strap from point D around the front of the blade to point E; Finally, pass section A of the lifting belt around the back of the blade from point E and pass between the lifting belt and the blade to point C and then move vertically upwards; Pass section B of the lifting strap from point C through the front of the blade to point D; Then attach section B of the lifting strap from point D around the back of the blade to point E; Finally, pass the B section of the lifting belt from point E around the front of the blade and pass between the lifting belt and the blade to point C and then move it vertically upwards; Lift the blade and adjust the binding point C so that the blade root chassis is consistent with the horizontal line to achieve stable lifting.

2. The adjustable propeller blade lashing and hoisting method according to claim 1 is characterized in that: There are lifting buckles at both ends of the lifting sling.

3. The adjustable propeller blade lashing and hoisting method according to claim 1 is characterized in that: The lifting capacity of the lifting sling is greater than half of the weight of the blade.

4. The method for tying and hoisting adjustable propeller blades according to claim 1 is characterized in that: The length of the lifting sling is greater than twice the length required for the section A or the section B to wrap around points C, D, E and C in sequence to form a loop.

5. The method for tying and hoisting adjustable propeller blades according to claim 1 is characterized in that: The lifting belt is wrapped with multiple layers of cloth strips at the positions where the corners of the blades contact the lifting belt.

6. The method for lashing and hoisting adjustable propeller blades according to claim 1 is characterized in that: The method for adjusting the binding point C is to move the position of the point C where the lifting sling section A and the lifting sling section B intersect upward or downward along the edge of the blade until the blade reaches a stable lifting state.

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