Mooring winch rope winding drum middle partition piece cable anti-cutting structure
By installing round bars at the notches in the middle sections of the mooring winch drum to form an arc-shaped contact surface, the problem of cable cutting is solved, the service life of the cable is extended, and safety and economy are improved.
Patent Information
- Application Number
- CN202423179564.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The notch structure in the middle section of the existing mooring winch drum can easily cut the cable, causing damage to the cable fiber bundles and shortening its service life.
A round bar is installed at the gap in the middle section to form an arc-shaped contact surface, avoiding contact between the cable and sharp corners. The round bar evenly distributes the cable pressure and reduces stress concentration.
It effectively prevents the cable from being cut in the middle section, extends the cable's service life, reduces damage caused by cutting force, and improves safety and economy.
Smart Images
Figure CN223765975U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mooring winch rope winding technology, and relates to a mooring winch rope winding drum with a middle section section cable anti-cut structure. Background Technology
[0002] As an essential deck machine on all types of ships, mooring winches are used for lifting, towing, and turning operations when ships are moored and docked. They also play a role in drifting, supporting, and positioning during the loading and unloading of cargo. The mooring cable is a key functional component of the mooring winch.
[0003] The cables of different models of mooring winches must withstand tensile forces ranging from several tons to tens of tons under normal operating conditions, as well as varying loads such as surges and wind. In many mooring winches that require maintaining constant cable tension, the cables are constantly under varying loads.
[0004] like Figure 1 As shown, the rope drum includes a tube 1, which has end plates at both ends and a middle section plate 3. The rope storage end plate 2, the middle section plate 3, and the working end plate 4 divide the rope drum into two parts along the axial direction. The wider part is the rope storage area 5, and the narrower part is the working area 6. The rope storage area 5 and the working area 6 are separated by the middle section plate 3 with a notch 7.
[0005] like Figure 2 and Figure 3 As shown, most of the cables 8 are wound in the cable storage area 5, and a small number of cables 5 cross the intermediate section 3 and are wound in the working area 6. When the mooring winch is working, as the drum rotates, the cables 8 in the cable storage area 5 gradually enter the working area 6 through the gap in the intermediate section 3 under the action of tension, thus achieving mooring.
[0006] like Figure 4 As shown, the middle section 3 is formed by flame or laser cutting of a plate, and the burrs and sharp edges are removed by grinding, generally grinding into a 2×45° chamfered shape.
[0007] like Figure 5 As shown, when the cable 8 is under tension, the cable 8 is tightly fitted to the end face of the notch 7 of the intermediate partition 3. The huge pressure of the tensioned cable 8 acts on the chamfer of the intermediate partition 3, and the corresponding reaction force creates a cutting effect on the cable 8, which can easily damage the cable 8. After repeated use and long-term tensioning, the fiber bundles of the cable 8 are prone to local breakage. After accumulating to a certain extent, the cable 8 cannot withstand the normal working load and will break as a whole, thus shortening the service life of the cable 8.
[0008] The end face at the notch 7 of the middle section 3 of the rope drum needs to withstand the enormous pressure of the cable 8. The hardness and strength of the middle section 3 are much greater than those of the cable 8. The structural form of the middle section 3 directly affects the magnitude of the cutting force on the cable 8. Reducing or eliminating the cutting force of the notch 7 structure of the middle section 3 on the cable 8 is the key to optimizing the structure of the rope drum.
[0009] Patent CN216301395U discloses an anchor winch with zoned cable storage. The anchor winch includes an anchor winch component, a winch component, a drive component, and a clutch component. The winch component includes a winch shaft, a drum, and a cable. The drum includes a cylinder, a first flange, a second flange, and a third flange. The third flange is located between the first flange and the second flange. The space between the third flange and the first flange forms a cable storage area, and the space between the third flange and the second flange forms a working area. The third flange is provided with a notch that connects the cable storage area and the working area. The cable is wound around the cable storage area and passes through the notch to the working area. The cable is first wound around the cable storage area for a predetermined length and then crosses the notch to be wound into the working area, thereby achieving the zoned storage effect of the cable. However, even though the notch groove of the third flange of this patent has an arc-shaped chamfer at the end of the groove wall, sharp edges are still easily left on the two sides of the groove wall. When the cable frequently passes through the notch groove, the sharp edges on the notch groove will have a cutting effect on the cable, which can easily cause the cable to wear out and break quickly in a localized area. Utility Model Content
[0010] The purpose of this invention is to overcome at least one of the defects of the prior art and provide a mooring winch drum with a middle section cable anti-cutting structure. This invention will not cut the cable fiber bundle and avoids additional damage to the cable.
[0011] The objective of this utility model can be achieved through the following technical solutions:
[0012] One of the technical solutions of this utility model is to provide a mooring winch rope drum intermediate section cable anti-cut structure. The structure includes a round bar, and the rope drum includes a tube. The tube has end area outer plates at both ends of a segment and an intermediate section in the middle of a segment. The intermediate section has a notch, and stepped grooves are formed on both sides of the notch. A round bar is placed in the stepped groove. The intermediate section divides the rope drum space between the end area outer plates at both ends into two rope winding spaces. The cable crosses the round bar at the notch from one rope winding space into the other rope winding space.
[0013] As a preferred technical solution, the material of the round bar is hot-rolled low-alloy structural steel.
[0014] Furthermore, the diameter of the round bar is 20-30 mm.
[0015] Furthermore, the length of the round bar does not exceed the height of the notch. If it extends beyond the rear end face, it may snag the cable and cause other accidents. The diameter of the round bar is equal to the depth of the stepped groove to ensure that the contact surface between the cable and the notch is always an arc surface. If the diameter of the round bar is too large, it will occupy the storage and working space of the cable.
[0016] As a preferred technical solution, the round bar is welded into the stepped groove. Since both the round bar and the flange have good welding performance, it can ensure that the tensile strength between the welded round bar, the weld, and the flange is close to the tensile strength of the materials used for the round bar and the flange, which is much greater than the working tension of the cable. This can maintain the stability of the round bar connected in the stepped groove and prevent it from being scraped off from the middle section when the cable is tensioned.
[0017] Furthermore, the angle of the notch is 18-36°, which allows the cable to maintain appropriate tension during its round trip between the cable storage area and the working area.
[0018] Furthermore, the outer end area includes a rope storage outer end area and a working outer end area. The rope storage outer end area and the working outer end area are respectively disposed at both ends of a section of the tube. The space between the rope storage outer end area and the intermediate section is defined as the rope storage area, and the space between the intermediate section and the working outer end area is defined as the working area.
[0019] Furthermore, the distance between the outer plate of the rope storage end area and the middle section is greater than that between the middle section and the outer plate of the working end area. This facilitates the winding of most of the cable in the large-space rope storage area while a small portion of the cable crosses the round bar at the notch on the middle section to enter the small-space working area for mooring. The working length of the cable is typically 220-280m, depending on the vessel. Because the working area requires frequent cable winding and unwinding, ensuring the cable direction, and facilitating cable tension control, it is generally wound in 3 layers. The remaining majority of the cable is wound in the rope storage area, typically in 6-8 layers.
[0020] As a preferred technical solution, the diameter of the outer piece of the working end area is smaller than that of the outer piece of the rope storage end area and the middle partition piece, which facilitates the use of the cable for tying in the working area. Since the cable is generally wound in no more than 3 layers in the working area, the diameter of the outer piece of the working end area outside the working area is relatively small.
[0021] Furthermore, a brake hub is provided on the outer side of the outer piece of the working end area, which is used to brake the rope drum.
[0022] Furthermore, a shaft hole is provided on the outer plate of the end area. One end of the main shaft of the mooring winch passes through the shaft hole, and the other end enters the mounting hole of the bearing support seat installed on the outer side of the outer plate of the rope storage end area, so that the rope drum can rotate on the main shaft.
[0023] As a preferred technical solution, the diameter of the shaft hole is smaller than that of the bobbin, which facilitates the main shaft to extend into the bobbin and drive the bobbin to rotate through the clutch. Since the bobbin rotates when the mooring winch is working to realize the winding and unwinding of the cable, and the bobbin cannot rotate arbitrarily when the mooring winch is not working, the diameter of the main shaft and the shaft hole must be smaller than that of the bobbin to facilitate the installation of the clutch on the main shaft.
[0024] As a preferred technical solution, the materials of the outer end area and the middle section are hot-rolled low-alloy structural steel, which meets the requirements of strength and economy.
[0025] Furthermore, the outer end section and the middle section are in the form of flanges, and the structure and manufacturing process of the flanges are simple.
[0026] Furthermore, the thickness of the outer end area and the middle section is 10-25mm.
[0027] As a preferred technical solution, the diameter of the round bar is greater than the thickness of the outer end plate and the middle section plate, ensuring that the contact surface of the cable at the notch is always an arc surface.
[0028] As a preferred technical solution, the outer end section and the middle section section are welded to the tube, maintaining the stability of the connection between the outer end section and the middle section section and the tube. The welding process is very convenient, has high strength, and can be used for a long time.
[0029] As a preferred technical solution, the material of the cylinder is hot-rolled low-alloy structural steel.
[0030] As a preferred technical solution, the material of the cable is selected from one of the following polymer materials: ultra-high molecular weight polyethylene fiber, polypropylene fiber, nylon, and polyester.
[0031] One of the technical solutions of this utility model is to provide a method for preventing the cable of a mooring winch from being cut in the middle section of the drum. The method uses the aforementioned structure to prevent the cable from being cut in the middle section. The method includes the following steps:
[0032] The round bar serves as a cut-resistant element. When the cable crosses the intermediate section from the storage area into the working area, it bears pressure evenly distributed along the arc surface of the round bar, preventing the formation of localized micro-stress concentration areas and thus avoiding any cutting effect on the cable fiber bundles. At the same time, the arc-shaped contact end face has a larger contact area, smaller turning radius, and larger curvature radius at the turning point compared to the sharp-angle contact edge, reducing the degree of bending and folding of the cable, thereby preventing additional damage to the cable and ensuring safe and reliable operation of the cable during its normal service life.
[0033] Compared with the prior art, the present invention has the following beneficial effects:
[0034] (1) This utility model eliminates the sharp corners of the notch end face by adding a round bar at the notch of the middle partition (under the action of tension, even if the sharp corners of the notch end face are obtuse, their edges will have a strong cutting effect on the cable), expands the radius of curvature of the notch end face, solves the problem of the cable fiber bundle being subjected to cutting force and the cable generating stress concentration in the working state, eliminates the cutting effect of the middle partition on the cable fiber bundle, reduces the degree of bending and bending of the cable, and better protects the cable.
[0035] (2) This utility model divides the space between the outer plate of the rope storage end area and the outer plate of the working end area into a rope storage area and a working area by dividing the middle section. The space of the rope storage area is larger than that of the working area, which makes it convenient to wind up the cable while waiting. At the same time, a small part of the cable enters the working area through the gap of the middle section to tie the cable.
[0036] (3) By adding a round bar at the gap of the middle section, the present invention achieves the middle section without cutting the cable in the simplest way, avoiding the high cost of machining and the disadvantages of low shape accuracy and inability to guarantee the shape accuracy caused by grinding. It ensures the normal service life of the cable, avoids the danger of sudden breakage due to the imperceptible breakage of the cable fiber bundle, and can also reduce the fiber bundle damage caused by the increased tension of the cable during tides or large surges, reduce the cost of replacing the cable for the ship owner, and improve the level of safe operation. Attached Figure Description
[0037] Figure 1 This is a schematic diagram of the structure of the rope drum of a mooring winch in the prior art;
[0038] Figure 2 This is a schematic diagram of the mooring winch's rope drum during rope winding in the prior art;
[0039] Figure 3 This is a magnified schematic diagram of point A on the mooring winch drum during rope winding in the prior art;
[0040] Figure 4 This is a schematic diagram of the structure of the intermediate partition in the prior art;
[0041] Figure 5 This is a schematic diagram illustrating the state of the intermediate sections during rope winding in existing technology.
[0042] Figure 6 This is a schematic diagram of the mooring winch rope drum intermediate section cable anti-cut structure in an embodiment of this utility model;
[0043] Figure 7 This is a schematic diagram showing the state of the middle section when the rope is wound in an embodiment of this utility model.
[0044] Explanation of markings in the diagram:
[0045] 1—Boll tube, 2—Outer piece of rope storage end area, 3—Intermediate section, 4—Outer piece of working end area, 5—Rope storage area, 6—Working area, 7—Notch, 8—Cable, 9—Round bar, 10—Brake hub, 11—Shaft hole. Detailed Implementation
[0046] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.
[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and are not intended to imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.
[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0049] Example:
[0050] A mooring winch rope drum with segmented cable anti-cutting structure, such as... Figure 6 and Figure 7 As shown, the device includes a round bar 9 and a rope drum including a tube 1. The tube 1 has end area outer plates at both ends of a segment and an intermediate section 3 in the middle of a segment. The intermediate section 3 has a notch 7 and stepped grooves on both sides of the notch 7. The round bar 9 is placed in the stepped groove. The intermediate section 3 divides the rope drum space between the end area outer plates at both ends into two rope winding spaces. The cable 8 crosses the round bar 9 at the notch 7 from one rope winding space and enters the other rope winding space.
[0051] The material for round bar 9 is S355J2 steel;
[0052] The diameter of the round bar 9 is 20-30mm, and in this embodiment it is preferably 25mm;
[0053] The length of the round bar 9 shall not exceed the height of the notch 7. If it exceeds the rear end face, it may snag the cable 8 and cause other accidents. The diameter of the round bar 9 shall be equal to the depth of the stepped groove to ensure that the contact surface of the cable 8 at the notch 7 is always an arc surface. If the diameter of the round bar 9 is too large, it will occupy the storage and working space of the cable 8.
[0054] The round bar 9 is welded into the stepped groove. Since both the round bar 9 and the flange have good welding performance, it can ensure that the tensile strength between the round bar 9, the weld and the flange after welding is close to the tensile strength of the materials used for the round bar 9 and the flange, which is much greater than the working tension of the cable 8. This can maintain the stability of the round bar 9 connected in the stepped groove and prevent it from being scraped off from the middle partition plate 3 when the cable 8 is tensioned.
[0055] The angle of the notch 7 is 18-36°, so that the cable 8 maintains appropriate tension during the round trip between the cable storage area 5 and the working area 6. In this embodiment, 36° is preferred.
[0056] The outer end area includes a rope storage end area outer piece 2 and a working end area outer piece 4. The rope storage end area outer piece 2 and the working end area outer piece 4 are respectively set at both ends of a section of the tube 1. The space between the rope storage end area outer piece 2 and the intermediate section 3 is set as the rope storage area 5. The space between the intermediate section 3 and the working end area outer piece 4 is set as the working area 6.
[0057] The distance between the outer plate 2 of the rope storage end area and the middle section plate 3 is greater than that between the middle section plate 3 and the outer plate 4 of the working end area. This facilitates the winding of most of the cable 8 while it is waiting in the large space of the rope storage area 5. At the same time, a small portion of the cable 8 crosses the round bar 9 at the notch 7 on the middle section plate 3 and enters the small space of the working area 6 for mooring. The working length of the cable 8 is usually 220-280m, depending on the ship. Because the cable 8 is frequently wound and released in the working area 6, it is necessary to ensure the direction of the cable 8 and facilitate the control of the tension of the cable 8. Generally, it is wound in 3 layers. The remaining approximately 85% of the cable 8 is wound in the rope storage area 5, generally in 6-8 layers.
[0058] The diameter of the outer plate 4 of the working end area is smaller than that of the outer plate 2 of the rope storage end area and the middle partition plate 3, which makes it convenient for the cable 8 to be tied in the working area 6. Since the cable 8 is generally wound in no more than 3 layers in the working area 6, the diameter of the outer plate 4 of the working end area outside the working area 6 is smaller.
[0059] A brake hub 10 is provided on the outer side of the outer piece 4 of the working end area. The brake hub 10 is used to brake the rope drum.
[0060] A shaft hole 11 is provided on the outer plate of the end area. One end of the main shaft of the mooring winch passes through the shaft hole 11, and the other end enters the mounting hole of the bearing support seat installed on the outer side of the outer plate 2 of the rope storage end area, so that the rope drum can rotate on the main shaft.
[0061] The diameter of the shaft hole 11 is smaller than that of the tube 1, which makes it convenient for the main shaft to extend into the tube 1 and drive the tube 1 to rotate through the clutch. Since the tube 1 rotates when the mooring winch is working to realize the winding and unwinding of the cable 8, the tube 1 cannot rotate arbitrarily when the mooring winch is not working. Therefore, the diameter of the main shaft and the shaft hole 11 must be smaller than that of the tube 1 to facilitate the installation of the clutch on the main shaft.
[0062] The outer end section and the middle section 3 are made of S355J2 steel, which meets the requirements of strength and economy.
[0063] Flanges are used for the outer end section and the middle section section 3. The structure and manufacturing process of flanges are simple.
[0064] The thickness of the outer end area and the middle section 3 is 10-25mm, and in this embodiment it is preferably 20mm;
[0065] The diameter of the round bar 9 is greater than the thickness of the outer end plate and the middle section plate 3, ensuring that the contact surface of the cable 8 at the notch 7 is always an arc surface;
[0066] The outer end section and the middle section section 3 are welded to the tube 1 to maintain the stability of the connection between the outer end section and the middle section section 3 and the tube 1. The welding process is very convenient, has high strength, and can be used for a long time.
[0067] The material for cylinder 1 is S355J2 steel;
[0068] The material of the cable 8 is selected from one of the following polymer materials: ultra-high molecular weight polyethylene fiber, polypropylene fiber, nylon, and polyester. Considering applicability, economy, and lifespan, ultra-high molecular weight polyethylene fiber is preferred in this embodiment.
[0069] A method for preventing the cable 8 from being cut in the intermediate section 3 of a mooring winch drum, using the above-mentioned structure, is described below. The specific steps are as follows:
[0070] The round bar 9 serves as a cut-resistant element. When the cable 8 crosses the intermediate partition 3 from the cable storage area 5 into the working area 6, the cable 8 is subjected to pressure evenly distributed along the arc surface of the round bar 9, which does not generate local micro-stress concentration areas and will not cause the cable 8 fiber bundle to be cut. At the same time, the arc contact end face has a larger contact area, smaller turning amplitude, and larger radius of curvature at the turning point compared to the sharp corner contact edge, which reduces the degree of bending and bending of the cable 8, thereby avoiding additional damage to the cable 8 and ensuring that the cable 8 works safely and reliably during its normal service life.
[0071] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.
Claims
1. A mooring winch rope-winding-drum intermediate partition piece cable anti-cutting structure, characterized in that, The structure comprises a round bar (9), the winding rope drum comprises a drum pipe (1), end area outer sheets are arranged at both ends of a section of the drum pipe (1), a middle section outer sheet (3) is arranged at the middle of a section, a notch (7) is arranged on the middle section outer sheet (3), step grooves are arranged at both sides of the notch (7), the round bar (9) is arranged in the step grooves, the middle section outer sheet (3) divides the space of the winding rope drum between the end area outer sheets into two winding rope spaces, the cable (8) passes through the round bar (9) at the notch (7) from one winding rope space to another winding rope space.
2. The mooring winch rope-winding drum intermediate partition piece cable rope anti-cutting structure according to claim 1, characterized in that, The diameter of the round bar (9) is 20-30 mm.
3. The mooring winch rope-winding drum intermediate partition piece cable rope anti-cutting structure according to claim 1, characterized in that, The length of the round bar (9) is not more than the height of the notch (7), and the diameter of the round bar (9) is equal to the depth of the step groove.
4. The mooring winch rope-winding drum intermediate partition piece cable rope anti-cutting structure according to claim 1, characterized in that, The angle of the notch (7) is 18-36°.
5. The mooring winch rope drum intermediate sector cable cut prevention structure according to claim 1, characterized in that, The end area outer sheet comprises a rope storage end area outer sheet (2) and a working end area outer sheet (4), the rope storage end area outer sheet (2) and the working end area outer sheet (4) are arranged at both ends of a section of the drum pipe (1), the space of the winding rope drum between the rope storage end area outer sheet (2) and the middle section outer sheet (3) is set as a rope storage area (5), and the space of the winding rope drum between the middle section outer sheet (3) and the working end area outer sheet (4) is set as a working area (6).
6. The mooring winch rope drum intermediate sector cable cut prevention structure according to claim 5, wherein, The distance between the rope storage end area outer sheet (2) and the middle section outer sheet (3) is greater than that between the middle section outer sheet (3) and the working end area outer sheet (4).
7. The mooring winch rope drum intermediate sector cable rope anti-cutting structure according to claim 5, characterized in that, A brake hub (10) is arranged on the outer side of the working end area outer sheet (4).
8. The mooring winch rope drum intermediate sector cable cut prevention structure of claim 1, wherein, An axle hole (11) is arranged on the end area outer sheet, and the main shaft of the mooring winch passes through the axle hole (11).
9. The mooring winch rope drum intermediate sector cable cut prevention structure of claim 1, wherein, The end area outer sheet and the middle section outer sheet (3) adopt a flange sheet.
10. The mooring winch rope drum intermediate sector cable cut prevention structure of claim 1, wherein, The thickness of the end area outer sheet and the middle section outer sheet (3) is 10-25 mm.