Marine propeller fishing net cutter mechanism

Abstract

The invention relates to the technical field of ship propellers, and discloses a marine propeller fishing net cutter mechanism which comprises a propeller body and moving cutters, the two moving cutters are arranged at one end of the propeller body, a shaft sleeve is movably connected to the interior of one end of the propeller body, the two fixed cutters are arranged outside the shaft sleeve, and the moving cutters are rotationally connected to one sides of the fixed cutters. The movable cutter and the fixed cutter form a shearing structure, cutter edges are machined on the peripheries of the movable cutter and the fixed cutter, the movable cutter is fixed to the propeller through combination of the movable cutter and the fixed cutter, the fixed cutter is fixed to the propeller body, when the propeller rotates, the movable cutter rotates synchronously, the distance between the cutting faces of the movable cutter and the fixed cutter is adjusted during installation, and the movable cutter and the fixed cutter are combined to form a structure similar to scissors. The powerful driving force generated when the propeller rotates is utilized, the movable cutter and the fixed cutter generate powerful cutting force, and therefore ropes of fishing nets are rapidly cut off through the sharp cutting edges, ships are protected, and wound wire nets are efficiently cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of ship propellers, in particular to a ship propeller fishing net cutting mechanism. Background Art

[0002] During the voyage, the bottom of the ship often contacts with nets, ropes and other suspended objects in the sea. Under the influence of the hull line, these suspended objects flow rapidly to the stern of the ship with the water flow and entangle on the shaft section of the stern shaft near the propeller, increasing the hull resistance. In serious cases, it may cause damage to the hull sealing bearing components, water ingress to the hull, and major safety accidents. From a structural point of view, a fishing net cutter must be installed at the stern shaft end. If these entangled nets are not cleaned up, the speed will be affected at the least, the propeller resistance will increase, and the propeller will stop rotating at the worst, causing the ship to stop sailing, which seriously affects the navigation safety and normal production operations of the ship.

[0003] The current treatment methods are mainly to stop the ship and send divers to the sea to clean up, or tow the faulty ship to the port and shore for treatment, which affects the normal navigation and normal production of the ship and brings certain economic losses to the shipowner. In addition, some thrusters also use fixed welded fishing net cutters. This simple fishing net cutter is fixed to the thruster and does not rotate relative to the thruster. It is mainly cut off by the active winding of the net and the friction with the blade of the fishing net cutter. However, in actual working conditions, if the fishing net cutter itself is entangled with a large amount of net, or the strength of the fishing net is relatively large, cutting by the fishing net cutter itself can only increase the difficulty of cutting, and may also cause secondary damage. Without any elimination measures, the fishing net cutter fails.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original fishing net cutter used for ship propellers. Summary of the invention

[0005] In order to solve the technical problem that the bottom of the existing hull contacts the nets, the ropes and other suspended objects in the sea flow rapidly to the stern of the ship with the water flow and are entangled on the shaft section of the stern shaft close to the propeller, resulting in increased hull resistance, thereby causing damage to the hull sealing bearing components, water ingress to the hull and other safety accidents, the present invention provides a marine propeller fishing net cutting mechanism.

[0006] The present invention is implemented by the following technical scheme: a marine propeller fishing net cutting knife mechanism, comprising a propeller body and a moving knife, two moving knives are arranged at one end of the propeller body, a shaft sleeve is movably connected inside one end of the propeller body, two fixed knives are arranged outside the shaft sleeve, the moving knife is rotatably connected to one side of the fixed knife, the moving knife and the fixed knife form a shearing structure, and the moving knife and the fixed knife are processed with cutting edges around them.

[0007] Preferably, an adjustment gasket is provided between one end of the propeller body and the movable blade, and the adjustment gasket is used to adjust the installation gap between the movable blade and the fixed blade.

[0008] Preferably, a moving blade mounting seat is provided on the outer side of the moving blade, a plurality of first fixing bolts are provided inside the moving blade mounting seat, and the moving blade mounting seat is fixedly connected to one end of the propeller body through the plurality of first fixing bolts.

[0009] Preferably, the bottom of the fixed knife is fixedly connected to a fixed knife mounting seat, the bottom of the fixed knife mounting seat is fixedly connected to a fixed knife fixing seat, and the bottom of the fixed knife fixing seat is fixedly connected to the outside of the shaft sleeve.

[0010] Preferably, a plurality of second fixing bolts are arranged inside the fixed knife mounting seat and the fixed knife fixing seat, the fixed knife mounting seat is fixedly connected to the top of the fixed knife fixing seat by the plurality of second fixing bolts, and the fixed knife fixing seat is fixedly connected to the top of the sleeve by the plurality of second fixing bolts.

[0011] Preferably, one end of the shaft sleeve is fixedly connected to the propeller body, and the propeller body is rotatably connected to one end of the propeller body.

[0012] Preferably, the movable knife and the fixed knife are shaped like an axe with blades on both ends.

[0013] Preferably, the hardness of the movable knife and the fixed knife is greater than HRC62.

[0014] Preferably, the bending strength of the movable knife and the fixed knife is greater than 300kg / mm2.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, through the combination of the movable knife and the fixed knife, the movable knife is fixed to the propeller, and the fixed knife is fixed to the propeller body. When the propeller rotates, the movable knife rotates synchronously. When installing, the distance between the cutting surfaces of the movable knife and the fixed knife is adjusted. The two will be combined to form a scissors-like structure. The powerful driving force when the propeller rotates is used to make the movable knife and the fixed knife generate a strong cutting force, so that the sharp blade edge can be used to quickly cut the rope of the fishing net, protect the ship, and efficiently clean the entangled wire net.

[0016] When the present invention is in use, after the first fixing bolt is removed by a tool, the movable knife and the movable knife mounting seat can be removed, thereby facilitating the removal of the movable knife for replacement; after the second fixing bolt is removed by a tool, the fixed knife and the fixed knife mounting seat can be removed, thereby allowing the fixed knife to be removed for replacement, and the operation is simple and convenient.

[0017] When the present invention is in use, an adjusting gasket is provided, and the adjusting gasket is used to adjust the installation gap between the movable knife and the fixed knife. During installation, the distance between the cutting surfaces of the movable knife and the fixed knife is adjusted. The two will be combined to form a scissors-like structure, which is convenient for cutting the wound wire net. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] In the figure: 1, propeller body; 2, moving blade; 3, adjusting gasket; 4, moving blade mounting seat; 5, first fixing bolt; 6, fixed blade; 7, fixed blade mounting seat; 8, fixed blade fixing seat; 9, shaft sleeve; 10, second fixing bolt. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0021] Example 1: Please refer to Figure 1 A marine propeller fishing net cutting knife mechanism of the present embodiment comprises a propeller body 1 and a moving knife 2, two moving knives 2 are arranged at one end of the propeller body 1, a shaft sleeve 9 is movably connected inside one end of the propeller body 1, two fixed knives 6 are arranged outside the shaft sleeve 9, the moving knife 2 is rotatably connected to one side of the fixed knife 6, the moving knife 2 and the fixed knife 6 form a shearing structure, and the moving knife 2 and the fixed knife 6 are processed with cutting edges around them; The movable blade 2 is fixed on the propeller and rotates synchronously with the propeller. The fixed blade 6 is fixed on the shaft sleeve 9. The shaft sleeve 9 is fixed on the propeller body through a flange or a pin shaft and does not rotate. Therefore, the fixed blade 6 is stationary relative to the propeller body. At the same time, the movable blade 2 and the fixed blade 6 form a shearing structure. When the propeller rotates, the movable blade 2 can effectively cut the entangled wire net by using the powerful driving force of the propeller rotation. Furthermore, an adjustment gasket 3 is provided between one end of the propeller body 1 and the movable blade 2. The adjustment gasket 3 is used to adjust the installation gap between the movable blade 2 and the fixed blade 6. When installing, the distance between the cutting surfaces of the movable blade 2 and the fixed blade 6 is adjusted. The two will be combined to form a scissors-like structure, which is convenient for cutting the wound wire net. Further, a moving blade mounting seat 4 is provided on the outer side of the moving blade 2, and a plurality of first fixing bolts 5 are provided inside the moving blade mounting seat 4. The moving blade mounting seat 4 is used to fixedly connect the moving blade 2 to one end of the propeller body 1 through the plurality of first fixing bolts 5. By providing the first fixing bolts 5, it is convenient to fix the moving blade mounting seat 4 and the moving blade 2 to one end of the propeller body 1. When the moving blade 2 needs to be replaced, the first fixing bolts 5 are removed to remove the moving blade 2 for replacement, and the operation is simple and convenient. Further, the bottom of the fixed knife 6 is fixedly connected to a fixed knife mounting seat 7, the bottom of the fixed knife mounting seat 7 is fixedly connected to a fixed knife fixing seat 8, the bottom of the fixed knife fixing seat 8 is fixedly connected to the outside of the shaft sleeve 9, and a plurality of second fixing bolts 10 are provided inside the fixed knife mounting seat 7 and the fixed knife fixing seat 8, the fixed knife mounting seat 7 is fixedly connected to the top of the fixed knife fixing seat 8 through the plurality of second fixing bolts 10, and the fixed knife fixing seat 8 is fixedly connected to the top of the shaft sleeve 9 through the plurality of second fixing bolts 10; Among them, by providing a second fixing bolt 10, the fixed knife fixing seat 8 can be fixed to the outside of the shaft sleeve 9 by the second fixing bolt 10, and the fixed knife mounting seat 7 can be fixed to the top of the fixed knife fixing seat 8 by the second fixing bolt 10. The fixed knife mounting seat 7 can adjust the position at the top of the fixed knife fixing seat 8, which is convenient for controlling the gap between the movable knife 2 and the fixed knife 6. When the fixed knife 6 needs to be replaced, the fixed knife mounting seat 7 and the movable knife 2 can be removed by removing the second fixing bolt 10 for replacement, which is simple and convenient to operate; Further, one end of the sleeve 9 is fixedly connected to the propeller body, the propeller body 1 is rotatably connected to one end of the propeller body, and is fixed to the sleeve 9 through the fixed knife mounting seat 7, and is stationary relative to the propeller body. The fixed knife mounting seat 7, the fixed knife fixing seat 8 and the sleeve 9 are fixed to the propeller body through flanges or pins, and do not make rotational motion. Therefore, when the propeller rotates, the movable knife 2 can effectively cross-cut the entangled wire net with the fixed knife 6 by utilizing the powerful driving force of the propeller rotation; Among them, the fishing net cutter movable knife 2 and fixed knife 6 need to be able to prevent the entanglement of the net and clean the net that has been entangled in the propeller stern shaft section from the functional point of view. For medium and large ships, it can avoid sending divers or docking to deal with the problem of net entanglement, thereby protecting the ship, reducing the number of maintenance times, and reducing the navigation cost of the ship; Furthermore, the movable blade 2 and the fixed blade 6 are in the shape of an axe with blades on both ends. Since the movable blade 2 and the fixed blade 6 are fully immersed in seawater, the movable blade 2 and the fixed blade 6 require materials with high corrosion resistance. Functionally, the movable blade 2 and the fixed blade 6 need to have sharp edges to quickly cut the wire net. During the process of cutting the wire net, the blade will be subjected to greater pressure and impact. Secondly, the movable knife 2 and the fixed knife 6 must not only withstand the friction resistance of seawater, but also be able to cut various wire nets. Therefore, the hardness of the movable knife 2 and the fixed knife 6 is greater than HRC62, and at the same time has certain wear resistance, high strength and toughness, and its bending strength is greater than 300kg / mm2. In order to facilitate manufacturing, the tool material has good forging, heat treatment and grinding processing properties. Therefore, the material of the tool is 20Cr4Ni4, and the surface coating is TIC. Working principle: through the combination of the movable knife 2 and the fixed knife 6, the movable knife 2 is fixed to the propeller, and the fixed knife 6 is fixed to the propeller body. When the propeller rotates, the movable knife 2 rotates synchronously. During installation, the distance between the cutting surfaces of the movable knife 2 and the fixed knife 6 is adjusted. The two will be combined to form a scissors-like structure. The powerful driving force when the propeller rotates is used to make the movable knife 2 and the fixed knife 6 generate a strong cutting force, so as to use the sharp blade to quickly cut the rope of the fishing net, protect the ship, and efficiently clean up the entangled wire net.

[0022] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A marine propeller fishing net cutting mechanism, comprising a propeller body (1) and a moving knife (2), characterized in that: Two movable knives (2) are arranged at one end of the propeller body (1); a shaft sleeve (9) is movably connected inside one end of the propeller body (1); two fixed knives (6) are arranged outside the shaft sleeve (9); the movable knives (2) are rotatably connected to one side of the fixed knives (6); the movable knives (2) and the fixed knives (6) form a shearing structure; and the movable knives (2) and the fixed knives (6) are machined with cutting edges on all sides.

2. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: An adjustment gasket (3) is provided between one end of the propeller body (1) and the movable blade (2), and the adjustment gasket (3) is used to adjust the installation gap between the movable blade (2) and the fixed blade (6).

3. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: A moving blade mounting seat (4) is arranged on the outer side of the moving blade (2), and a plurality of first fixing bolts (5) are arranged inside the moving blade mounting seat (4). The moving blade mounting seat (4) is used to fixedly connect the moving blade (2) to one end of the propeller body (1) via the plurality of first fixing bolts (5).

4. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: The bottom of the fixed knife (6) is fixedly connected to a fixed knife mounting seat (7), the bottom of the fixed knife mounting seat (7) is fixedly connected to a fixed knife fixing seat (8), and the bottom of the fixed knife fixing seat (8) is fixedly connected to the outside of the shaft sleeve (9).

5. A marine propeller fishing net cutting mechanism according to claim 4, characterized in that: A plurality of second fixing bolts (10) are arranged inside the fixed knife mounting seat (7) and the fixed knife fixing seat (8); the fixed knife mounting seat (7) is fixedly connected to the top of the fixed knife fixing seat (8) via the plurality of second fixing bolts (10); and the fixed knife fixing seat (8) is fixedly connected to the top of the shaft sleeve (9) via the plurality of second fixing bolts (10).

6. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: One end of the shaft sleeve (9) is fixedly connected to a propeller body, and the propeller body (1) is rotatably connected to one end of the propeller body.

7. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: The movable knife (2) and the fixed knife (6) are shaped like an axe with blades on both ends.

8. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: The hardness of the movable knife (2) and the fixed knife (6) is greater than HRC62.

9. A marine propeller fishing net cutting mechanism according to claim 1, characterized in that: The bending strength of the movable knife (2) and the fixed knife (6) is greater than 300 kg / mm2.

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