Cable drum with adjustable radius

Abstract

The present invention discloses a cable drum with adjustable radius, which relates to the field of cable drums. Most existing cable drums are manufactured according to the curvature of the cable itself and can only be used for winding cables with a curvature less than or equal to this curvature. They have poor versatility for cables with different curvatures. If used for winding cables with a curvature greater than this curvature, the cable will break due to exceeding the cable curvature limit, causing significant economic losses. The present invention includes an upper drum plate, a lower drum plate, a central connecting shaft, a cable winding inner diameter rod, an adjustment device for the radial position of the cable winding inner diameter rod, and a support force providing device for offsetting the pressure applied to the cable winding inner diameter rod during cable winding. The bottom diameter of the cable drum can be adjusted and changed, and a support force is provided for the bottom diameter position of the cable drum to balance the pressure when the cable is wound, so that the cable can be wound with different anti-bending curvatures, the versatility of the cable winding is improved, and the cable breaking is prevented when the cable with a larger curvature is wound.

Description

Technical Field

[0001] The present invention relates to the field of cable drums, and in particular to a cable drum with adjustable radius. Background Art

[0002] The cable drum is a crucial piece of equipment for laying submarine cables. During on-site construction, the cable is unloaded from the drum using a cable tractor. The cable is laid to the seabed by ensuring the drum's rotational speed, the cable tractor's speed, and the cable construction vessel's forward speed are roughly synchronized. To ensure smooth communication, the cable's safety must be ensured during the laying and unwinding process.

[0003] Most existing cable drums are manufactured according to the curvature of the cable itself. The functions of the cable drums manufactured in this way are relatively simple. They can only be used for winding cables with a curvature less than or equal to the curvature of the cable. They have poor versatility for cables with different curvatures. If they are used for winding cables with a curvature greater than the curvature of the cable, the cable will break due to exceeding the curvature limit, causing significant economic losses. Summary of the Invention

[0004] The technical problem to be solved and the technical task to be addressed by the present invention are to improve and enhance existing technical solutions by providing a cable drum with an adjustable radius, thereby increasing its versatility and preventing cable breakage caused by entanglement of cables with large curvatures. To this end, the present invention adopts the following technical solutions.

[0005] A cable drum with adjustable radius, comprising an upper drum plate, a lower drum plate, a central connecting shaft, a cable winding inner diameter rod, an adjusting device for the radial position of the cable winding inner diameter rod and a supporting force providing device for providing an offset of the pressure on the cable winding inner diameter rod when the cable is wound, wherein the central connecting shaft connects the center positions of the upper drum plate and the lower drum plate, the upper end of the central connecting shaft extends upward, the cable winding inner diameter rods are arranged at equal angles around the central connecting shaft, the supporting force providing device is connected to the upper end of the central connecting shaft and the upper end of each cable winding inner diameter rod, the adjusting device is arranged on the upper drum plate and connected to the cable winding inner diameter rod to adjust the radial position of the cable winding inner diameter rod in the cable drum, the upper and lower ends of the cable winding inner diameter rod are subject to radial guide constraints on the upper and lower drum plates and can move radially. The adjusting device can realize radial change of the position of the inner diameter rod of the cable coiling, realize adjustment and change of the bottom diameter of the cable drum, and the supporting force providing device provides supporting force to the inner diameter rod of the cable coiling, so that the pressure is balanced when the cable is coiled, and the coiling of cables with different bending curvatures can be effectively realized, thereby improving the versatility of cable coiling, preventing the cable from breaking when the cable with a larger curvature is wound, and avoiding economic losses.

[0006] As a preferred technical measure, the support force providing device includes multiple springs, the number of which is equal to the number of the cable coiling inner diameter rods. One end of the spring is connected to the upper end of the central connecting shaft, and the other end of the spring is connected to the upper end of the cable coiling inner diameter rod. The elasticity of the springs effectively provides support force for the cable coiling inner diameter rod.

[0007] As a preferred technical measure, a small nut for adjusting the spring's angle and securing it is installed at the upper end of the cable-wound inner diameter rod, while a large nut for securing the spring is installed at the upper end of the central connecting shaft. This allows for both connection, securing, and adjustment of the spring, with varying spring inclinations resulting in varying support forces.

[0008] As a preferred technical approach, the lower end of the spring hooks onto the threads on the upper end of the inner diameter rod around which the cable is coiled. The small nut is positioned above the spring hook. As the small nut is turned vertically, the spring hook position also moves up and down. This effectively connects the spring to the inner diameter rod around which the cable is coiled, and allows for adjustment of the spring's inclination.

[0009] As a preferred technical means, the upper plate is provided with radial upper grooves corresponding to the radial movement paths of each cable coiling inner diameter rod. The adjustment device utilizes an adjusting screw. The adjusting screw extends from the radial outer side of the upper plate along the upper grooves to the radial inner side, passing through the cable coiling inner diameter rods and mating with the threads of the cable coiling inner diameter rods. By rotating the adjusting screws, radial movement of the cable coiling inner diameter rods can be facilitated.

[0010] As a preferred technical means: the adjusting screw is rotatably connected to a screw seat on the outer side of the upper plate, and the adjusting screw is provided with an adjusting handle on the outer side of the screw seat. This enables the adjusting screw to be rotatably fixed to the upper plate, and the setting of the adjusting handle facilitates the adjustment and rotation operation.

[0011] As a preferred technical means, the lower plate is provided with radial lower rail grooves corresponding to the radial movement trajectory of each cable winding inner diameter rod, and radial guide rails are provided in the lower rail grooves. The lower ends of the cable winding inner diameter rods are provided with guide holes, which slidably match the guide rails, thereby achieving radial guided movement of the lower ends of the cable winding inner diameter rods.

[0012] As a preferred technical measure, a pressure sensing device with a built-in numerical display is installed on the upper end surface of the upper plate, located at the radial movement trajectory of the cable coiling inner diameter rod. The sensing element of the pressure sensing device is in contact with the radial inner or outer side of the cable coiling inner diameter rod. The sensor has a built-in numerical display, which can effectively sense and display the force applied to the cable coiling inner diameter rod.

[0013] As a preferred technical means: the pressure sensing device is provided with an alarm device, which provides an alarm when the allowable force range is exceeded.

[0014] Beneficial effects: The bottom diameter of the cable drum can be easily adjusted, and the cable drum can provide a supporting force to balance the winding pressure when the cable is wound. It can effectively realize the winding of cables with different bending curvatures, improve the versatility of cable winding, prevent the cable from breaking when the cable with a large curvature is wound, and avoid economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] In the figure: 1. Upper plate; 2. Lower plate; 3. Center connecting shaft; 4. Cable winding inner diameter rod; 5. Spring; 6. Small nut; 7. Large nut; 8. Adjusting screw; 9. Screw seat; 10. Adjusting handle; 11. Lower rail groove; 12. Guide rail; 13. Pressure sensing device. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

[0018] In the description of the present invention, it should be understood that terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0019] like Figure 1As shown, a radius-adjustable cable drum comprises an upper drum plate 1, a lower drum plate 2, a central connecting shaft 3, a cable winding inner diameter rod 4, an adjusting screw 8 for the radial position of the cable winding inner diameter rod 4, and a spring system for providing a counteracting pressure on the cable winding inner diameter rod 4 when the cable is wound. The central connecting shaft 3 connects the center positions of the upper drum plate 1 and the lower drum plate 2, and the upper end of the central connecting shaft 3 extends upward. There are a total of 8 cable winding inner diameter rods 4, which are arranged at equal angles around the central connecting shaft 3. The spring system comprises 8 springs 5, which are all connected to the upper end of the central connecting shaft 3, and the lower ends of the 8 springs 5 are respectively connected to the upper end of each cable winding inner diameter rod 4. The cable is wound The upper end of the inner diameter rod 4 extends upward from the upper disk plate 1, but the upper end height of the cable winding inner diameter rod 4 is lower than the upper end height of the center connecting shaft rod 3, so that the spring 5 forms an inclination, and the upper end of the cable winding inner diameter rod 4 is provided with a small nut 6 for adjusting the inclination angle of the spring 5 and fixing it. The upper end of the center connecting shaft rod 3 is provided with a large nut 7 for fixing the spring 5. The lower end of the spring 5 hooks the thread of the upper end of the cable winding inner diameter rod 4, and the small nut 6 is located above the spring 5 hook. The small nut 6 is screwed to move vertically, and the hooking position of the spring 5 also moves up and down accordingly, realizing the connection between the spring 5 and the cable winding inner diameter rod 4 and the adjustment structure of the inclination of the spring 5, thereby changing the supporting force on the cable winding inner diameter rod 4. An adjustment screw 8 is rotatably connected to a screw seat 9 on the outside of the upper plate 1. An adjustment handle 10 is provided on the outside of the screw seat 9. The adjustment screw 8 passes through the cable winding inner diameter rod 4 radially inwardly of the upper plate 1, with threads interlocking therebetween to adjust the radial position of the cable winding inner diameter rod 4 within the cable drum. The upper and lower ends of the cable winding inner diameter rod 4 are radially guided and constrained on the upper and lower plates 1 and 2, allowing radial movement. The upper plate 1 is provided with radial upper grooves corresponding to the radial movement paths of each cable winding inner diameter rod 4. The adjustment mechanism utilizes the adjustment screw 8. The adjustment screw 8 passes through the cable winding inner diameter rod 4 radially inwardly from the radial outside of the upper plate 1, along the upper grooves, and then threads interlock with the cable winding inner diameter rod 4. Rotating the adjustment screw 8 facilitates radial movement of the cable winding inner diameter rod 4. The lower plate 2 is provided with a radial lower rail groove 11 at the position corresponding to the radial movement trajectory of each cable winding inner diameter rod 4, and a radial guide rail 12 is provided in the lower rail groove 11. The lower end of the cable winding inner diameter rod 4 is provided with a guide hole, and the guide hole and the guide rail 12 are slidably matched to realize the radial guided movement of the lower end of the cable winding inner diameter rod 4.

[0020] In order to improve safety and facilitate monitoring of the force changes of the cable winding inner diameter rod 4, the upper end surface of the upper plate 1 is provided with a pressure sensing device 13 with a built-in numerical display at the radial movement trajectory of the cable winding inner diameter rod 4. The sensing part of the pressure sensing device 13 is in contact with the radial inner side or outer side of the cable winding inner diameter rod 4. The pressure sensing device 13 is provided with an alarm device, which provides an audible and visual alarm when the allowable force range is exceeded. The sensor has its own numerical display, which can better sense and display the stress condition of the inner diameter rod 4 of the cable coiling. During the winding process of the submarine cable, each layer of cable will exert a certain pressure on the inner diameter of the cable drum. As the cable is wound layer by layer, the pressure generated becomes greater and greater. When the pressure is too high, the inner diameter of the cable drum may become smaller, thereby causing the diameter range of the submarine cable adapted to the original cable drum to change, causing the inner layer cable to break due to exceeding its allowable curvature radius. The pressure sensing device 13 can infer possible changes by monitoring the pressure exerted on the inner diameter rod 4 of the cable coiling, thereby avoiding the situation where the submarine cable is damaged due to exceeding the curvature range.

[0021] The pressure sensing device 13 is equipped with a SET button for setting the force sensing range and an RE button for clearing the force. The SET button allows the sensor's force range to be manually set. The RE button is used to clear the display after the inner diameter of the cable drum is fixed and before the submarine cable is wound, facilitating real-time observation of the force on the inner diameter of the cable drum during winding. When the pressure applied by the submarine cable exceeds the SET setting, it means that the inner layer of the submarine cable is at risk of breaking due to exceeding the allowable curvature. At this time, the alarm device built into the display is triggered, reminding the user that the inner diameter of the cable drum needs to be reset.

[0022] When in use, according to the limited curvature of the cable, the radial position of the cable winding inner diameter rod 4 is adjusted by adjusting the screw 8, so that the bottom diameter of the cable drum is changed to adapt to the cable that needs to be coiled, and the small nut 6 is adjusted to change the inclination of the spring 5, so that the supporting force of the spring 5 is changed to provide corresponding supporting force for the cable that needs to be coiled.

[0023] The present invention can effectively realize the coiling adjustment of cables with different anti-bending curvatures, improve the versatility of cable coiling, prevent the cable from breaking when the cable with a large curvature is wound, and avoid economic losses.

[0024] In this example, the spring 5 is made of high-rigidity spring material to ensure that the same cable drum is suitable for winding submarine cables of various diameters, thereby preventing excessive pressure from being applied during submarine cable winding, thereby causing plastic deformation of the spring 5.

[0025] above Figure 1The cable drum with adjustable radius shown is a specific embodiment of the present invention, which has embodied the substantial features and progress of the present invention. According to actual use needs and under the guidance of the present invention, equivalent modifications in shape, structure, etc. can be made to it, which are all within the scope of protection of this solution.

Claims

1. A cable drum with adjustable radius, characterized by: The invention comprises an upper plate (1), a lower plate (2), a central connecting shaft (3), a cable winding inner diameter rod (4), an adjusting device for the radial position of the cable winding inner diameter rod (4), and a supporting force providing device for providing a counteracting pressure on the cable winding inner diameter rod (4) when the cable is wound, wherein the central connecting shaft (3) connects the central position of the upper plate (1) and the lower plate (2), the upper end of the central connecting shaft (3) extends upward, and the cable winding inner diameter rod (4) surrounds the cable winding inner diameter rod (4). The central connecting shafts (3) are arranged at equal angles, the supporting force providing device is connected to the upper end of the central connecting shaft (3) and the upper end of each cable winding inner diameter rod (4), the adjusting device is arranged on the upper plate (1) and connected to the cable winding inner diameter rod (4) to adjust the radial position of the cable winding inner diameter rod (4) on the cable drum, and the upper and lower ends of the cable winding inner diameter rod (4) are subject to radial guide constraints on the upper plate (1) and the lower plate (2) and can move in the radial direction; The supporting force providing device comprises a plurality of springs (5), the number of the springs (5) being the same as the number of the cable coiled inner diameter rods (4), one end of the spring (5) being connected to the upper end of the central connecting shaft (3), and the other end of the spring (5) being connected to the upper end of the cable coiled inner diameter rod (4); The upper end of the cable winding inner diameter rod (4) is provided with a small nut (6) for adjusting the oblique angle of the spring (5) and fixing it, and the upper end of the central connecting shaft (3) is provided with a large nut (7) for fixing the spring (5).

2. The radius-adjustable cable drum according to claim 1, characterized in that: The lower end of the spring (5) is hooked on the thread of the upper end of the inner diameter rod (4) around which the cable is wound, and the small nut (6) is located above the hook of the spring (5). When the small nut (6) is screwed and moved vertically, the hook position of the spring (5) also moves up and down accordingly.

3. The cable drum with adjustable radius according to claim 1, characterized in that: The upper plate (1) is provided with a radial upper track groove at a position corresponding to the radial movement track of each cable winding inner diameter rod (4), and the adjustment device adopts an adjustment screw (8), which passes through the cable winding inner diameter rod (4) from the radial outer side of the upper plate (1) along the upper track groove to the radial inner side and matches with the thread of the cable winding inner diameter rod (4).

4. The cable drum with adjustable radius according to claim 3, characterized in that: The adjusting screw (8) is rotatably connected to a screw seat (9) on the outside of the upper plate (1), and the adjusting screw (8) is provided with an adjusting handle (10) on the outside of the screw seat (9).

5. The cable drum with adjustable radius according to claim 4, characterized in that: The lower plate (2) is provided with a radial lower rail groove (11) at a position corresponding to the radial movement track of each cable winding inner diameter rod (4), and a radial guide rail (12) is provided in the lower rail groove (11). The lower end of the cable winding inner diameter rod (4) is provided with a guide hole, and the guide hole is slidably matched with the guide rail (12).

6. The cable drum with adjustable radius according to claim 1, characterized in that: The upper end surface of the upper plate (1) is provided with a pressure sensing device (13) with a self-contained numerical display at the radial movement trajectory position of the cable winding inner diameter rod (4), and the sensing element of the pressure sensing device (13) is in contact with the radial inner side or outer side of the cable winding inner diameter rod (4).

7. The radius-adjustable cable drum according to claim 6, characterized in that: The pressure sensing device (13) is provided with an alarm device.

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