A drum device for providing cable pretension

Abstract

This invention discloses a winch drum device for providing pre-tension force to a cable, comprising a drum body and drum flanges. The drum flanges are symmetrically installed at both ends of the drum body. A rope passage hole is provided on one end of the drum flange. A rope clamp assembly for providing pre-tension force to the cable is arranged circumferentially along the side of the rope passage hole. The rope clamp assembly includes a screw, a fixed rope clamp, a sliding rope clamp, and a screw support. The fixed rope clamp and the screw support are located at both ends of the screw, keeping the screw axially fixed and allowing it to rotate radially. The sliding rope clamp is installed between the fixed rope clamp and the screw support and moves back and forth along the axial direction of the screw, thereby changing the distance between the sliding rope clamp and the fixed rope clamp. This invention provides pre-tension force to the cable by reducing the cable cross-section and clamping it in advance, solving the problem of insecure fiber optic cable securing with ordinary rope clamps on winch drums.

Description

Technical Field

[0001] This invention relates to a drum device, specifically a drum device capable of providing cable pretension, belonging to the field of marine engineering machinery technology. Background Technology

[0002] In existing technologies, marine winch cables generally consist of materials such as steel wire rope and fiber optic cables. The cable is secured to the drum by rope clamps or pressure plates on the drum, and multiple safety loops are wound around it to fix one end of the cable to the drum. However, fiber optic cables are relatively soft; for example, with Dyneema material, due to its softness, the cross-sectional dimensions of the cable shrink under tension, affecting the clamping force of the rope clamps or pressure plates, making it prone to loosening and other hazards. If multiple clamps are used in series, essentially only one clamp bears the force, with the others serving as backups, and cannot simultaneously share the cable tension. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a reel device that is structurally reasonable, easy to use, stable and safe.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a drum device for providing cable pretension force, comprising a winch drum composed of a drum body and a drum flange, wherein the drum flange is symmetrically installed at both ends of the drum body, and a rope passage hole is opened on one end of the drum flange. A rope clamp assembly for providing pretension force to the cable is arranged along the circumference of the drum flange on the side of the rope passage hole. The rope clamp assembly includes a screw, a fixed rope clamp, a sliding rope clamp, and a screw support. The fixed rope clamp and the screw support are disposed at both ends of the screw, so that the screw is kept axially fixed and can rotate radially. The sliding rope clamp is installed between the fixed rope clamp and the screw support and moves back and forth along the axial direction of the screw, thereby realizing the change of distance between the sliding rope clamp and the fixed rope clamp.

[0005] Furthermore, the rope clamp assembly is fixed to the outside of the drum flange next to the rope passage hole by fasteners or welding, and the rope clamp near the rope passage hole is about 3-4 times the cable diameter.

[0006] Furthermore, the screw includes a screw body with threads on its surface and screw heads symmetrically arranged at both ends of the screw body. The screw heads are optical axes, and the screw heads extend into the openings of the screw support and the fixed rope clamp, respectively, so that the screw can rotate axially within the screw support and the fixed rope clamp support. The screw body has external threads with the same direction of rotation and the same pitch. The sliding rope clamp is threadedly connected to the screw body and can slide horizontally along the screw body.

[0007] Furthermore, the fixed rope clamp and the sliding rope clamp have the same structure, both consisting of a rope clamp seat and a clamping part welded to the top of the rope clamp seat; the clamping part includes a U-shaped clamp and a clamping plate disposed above the U-shaped clamp, and the U-shaped clamp and the clamping plate are fixedly connected to form a cavity through which the cable can pass.

[0008] Furthermore, the two ends of the U-shaped chuck are threaded, and after passing through the clamping plate, the U-shaped chuck and the clamping plate are fixedly connected by nuts installed at their ends.

[0009] Furthermore, the clamping plate consists of a clamping plate body arranged laterally and a connecting part extending downward along both ends of the clamping plate body. The connecting part is a hollow structure that can accommodate the end of the U-shaped clamp, and its inner wall has threads. After the end of the U-shaped clamp passes through the connecting part, the two are threadedly connected.

[0010] Furthermore, after the end of the U-shaped clamp extends into the clamp body, the height of the pressure plate is adjusted by the nut on it.

[0011] Furthermore, the rope clamp seats are divided into a fixed rope clamp seat and a movable rope clamp seat. The fixed rope clamp seat has an inverted T-shaped structure and is fixed to the outside of the drum flange through the extensions at both ends of the T-shaped structure. The movable rope clamp seat has a threaded hole in the center for the screw to pass through, and there is a gap between its bottom and the drum flange.

[0012] Furthermore, the structure of the screw support is the same as that of the fixed rope clamp.

[0013] Compared with the prior art, the present invention, employing the above technical solution, has the following advantages:

[0014] This invention provides a cable pretensioning drum containing two rope clamp assemblies that can move in opposite directions along the cable length to provide pretensioning force to the middle cable, thereby reducing the cable cross-section and clamping it in advance. This solves the problem of ordinary rope clamps on winch drums not securely securing fiber optic cables. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the invention.

[0016] Figure 2 This is a partially enlarged view of the rope clamp assembly of the present invention.

[0017] Figure 3 This is a schematic diagram of the rope clamp assembly structure of the present invention. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings:

[0019] This embodiment proposes a drum device for providing cable pretension, the structure of which is as follows: Figures 1 to 3As shown, it mainly consists of a winch drum and a rope clamp assembly.

[0020] The winch drum includes a drum body 1-2 and a drum flange 1-1. There are two drum flanges, symmetrically installed on the left and right sides of the drum body. One drum flange has a rope passage hole 1-1-1. Simultaneously, next to the rope passage hole, a rope clamp assembly for providing pre-tension to the cable is arranged circumferentially along the drum flange. The rope clamp assembly is fixed to the outside of the drum flange next to the rope passage hole by fasteners or welding. The distance between the rope clamp and the rope passage hole is approximately 3-4 times the cable diameter.

[0021] The rope clamp assembly 2 includes a fixed rope clamp 2-2, a screw 2-3, a sliding rope clamp 2-4, and a screw support 2-5. The fixed rope clamp and the screw support are located at both ends of the screw, keeping the screw axially fixed and allowing it to rotate radially. The sliding rope clamp is installed between the fixed rope clamp and the screw support. When the screw rotates, the sliding rope clamp can move back and forth along the axial direction of the screw, thereby changing the distance between the sliding rope clamp and the fixed rope clamp.

[0022] The screw includes a screw body with threads on its surface and screw heads symmetrically arranged at both ends of the screw body. The screw heads extend into the openings of the screw support and the fixed rope clamp, respectively, so that the screw can rotate axially within the screw support and the fixed rope clamp support. The screw body has external threads with the same direction of rotation and the same pitch. The sliding rope clamp is threadedly connected to the screw body and can slide horizontally along the screw body.

[0023] Both the fixed and sliding rope clamps have the same structure, consisting of a rope clamp seat and a clamping part welded to the top of the rope clamp seat. The clamping part includes a U-shaped clamp 2-2-1 and a clamping plate 2-2-2 located above the U-shaped clamp, which are fixedly connected to form a cavity through which the cable can pass. Threads are provided at both ends of the U-shaped clamp. After passing through the clamping plate, the U-shaped clamp and the clamping plate are fixedly connected by nuts installed at their ends. The clamping plate consists of a horizontally arranged clamping plate body and connecting parts extending downwards from both ends of the clamping plate body. The connecting parts are hollow structures that can accommodate the ends of the U-shaped clamp, and their inner walls are threaded. After the ends of the U-shaped clamp pass through the connecting parts, the two are threaded together. Simultaneously, after the ends of the U-shaped clamp extend into the clamping plate body, the height of the clamping plate is adjusted by nuts 2-2-3 on it.

[0024] The fixed rope clamp seat has an inverted T-shaped structure, and is fixed to the outside of the drum flange through the extensions at both ends of the T-structure; the screw support has the same structure as the fixed rope clamp seat. The movable rope clamp seat has a threaded hole in the center for the screw to pass through, and there is a gap between its bottom and the drum flange.

[0025] When using the cable, thread it through the cable hole of the drum flange, and then through the U-shaped cable clamp of the fixed cable clamp seat and the U-shaped cable clamp of the sliding cable clamp seat in sequence. Straighten the cable, cover it with the pressure plate, and rotate the nut to tighten the pressure plate and the U-shaped cable clamps around the cable.

[0026] Use a wrench to rotate the square shaft on one side of the screw, causing the screw to rotate and move the sliding rope clamp away from the fixed rope clamp, thus tightening the cable. Once the cable's cross-sectional dimensions decrease under tension, rotate the nut on the U-shaped rope clamp again to tighten the cable. Repeat the above steps to achieve pre-tension on the cable and ensure it is completely secured to the drum.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A drum device for providing cable pretension, characterized in that: The winch drum comprises a cylinder and drum flanges. The drum flanges are symmetrically mounted at both ends of the cylinder. One end of the drum flange has a rope passage hole. Along the circumference of the drum flange, a rope clamp assembly is provided to provide preload tension to the cable. The rope clamp assembly includes a screw, a fixed rope clamp, a sliding rope clamp, and a screw support. The fixed rope clamp and screw support are located at both ends of the screw, keeping the screw axially fixed and allowing it to rotate radially. The sliding rope clamp is installed between the fixed rope clamp and the screw support, and rotates radially. The screw moves axially back and forth, thereby changing the distance between the sliding rope clamp and the fixed rope clamp. The rope clamp assembly is fixed to the outside of the drum flange next to the rope passage hole by fasteners or welding. The distance between the fixed rope clamp and the rope passage hole is 3-4 times the diameter of the cable. The fixed rope clamp and the sliding rope clamp have the same structure, both consisting of a rope clamp seat and a clamping part welded to the top of the rope clamp seat. The clamping part includes a U-shaped clamp and a clamping plate disposed above the U-shaped clamp. After the U-shaped clamp and the clamping plate are fixedly connected, they form a cavity through which the cable can pass.

2. The drum device for providing cable pretension according to claim 1, characterized in that: The screw includes a screw body with threads on its surface and screw heads symmetrically arranged at both ends of the screw body. The screw heads are optical axes and extend into the openings of the screw support and the fixed rope clamp, respectively, so that the screw can rotate axially within the screw support and the fixed rope clamp support. The screw body has external threads with the same direction of rotation and the same pitch. The sliding rope clamp is threadedly connected to the screw body and can slide horizontally along the screw body.

3. The drum device for providing cable pretension according to claim 1, characterized in that: The U-shaped chuck has threads on both ends. After passing through the clamping plate, the U-shaped chuck and the clamping plate are fixedly connected by nuts installed at their ends.

4. The drum device for providing cable pretension according to claim 1, characterized in that: The rope clamp seats are a fixed rope clamp seat and a movable rope clamp seat. The fixed rope clamp seat has an inverted T-shaped structure and is fixed to the outside of the drum flange through the extensions at both ends of the T-shaped structure. The movable rope clamp seat has a threaded hole in the center for the screw to pass through, and there is a gap between its bottom and the drum flange.

5. The drum device for providing cable pretension according to claim 4, characterized in that: The structure of the screw support is the same as that of the fixed rope clamp.

Images