Underwater cable dragging auxiliary device fixed on inner wall of sleeve

Abstract

The utility model belongs to the technical field of underwater cable dragging assisting, and particularly relates to an underwater cable dragging assisting device fixed on the inner wall of a sleeve, which comprises the sleeve, a first fixing frame with a detachable hollow structure is arranged in the sleeve along the axial direction, and a second fixing frame with a detachable hollow structure is arranged in the sleeve. Guide mechanisms for wires are arranged in the first fixing frame in three directions, each guide mechanism comprises a roller and a first mounting shaft which are sequentially arranged from inside to outside, and a wire channel for the wires to pass through is formed among the three rollers; according to the utility model, the first fixing frame and the three rollers are additionally arranged, so that the friction force of the underwater cable in the long-distance dragging and laying process is greatly reduced, the service life of the underwater cable is prolonged, and the underwater cable is prevented from being damaged. And the safety and the reliability in the cable dragging process are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of underwater cable dragging assistance, and in particular relates to an underwater cable dragging assistance device fixed on the inner wall of a sleeve. Background Art

[0002] With the development of underwater equipment and technology, ocean exploration has become a key development direction. This process requires a large number of pipes and cables for power transmission, control, and transportation. Unlike on land, underwater cables must remain underwater for extended periods, placing stringent demands not only on reliability but also on safety. Simply placing several kilometers of cable within a sleeve during the dragging process will significantly negatively impact the cable, affecting both safety and lifespan. This makes prolonged underwater operation unsuitable, and sediment, due to gravity, accumulates along with the cable on the sleeve busbar, accelerating corrosion. Overcoming friction and improving safety and service life are crucial challenges in underwater cable installation.

[0003] When it comes to underwater friction reduction, the most important issue is how to convert sliding friction into rolling friction, which significantly reduces friction. Secondly, how to secure the entire underwater cable in a relatively secure position and ensure uniform force distribution is also a topic that requires research. Currently, there are no established devices for underwater cable hauling to overcome these two major issues. This leads to numerous problems with submarine cable laying, such as friction damage, seawater corrosion, and cable life. This is clearly detrimental to the development of marine resources, the laying of underwater cables, and the implementation of various marine engineering projects. Utility Model Content

[0004] The purpose of the utility model is to provide an underwater cable pulling auxiliary device fixed on the inner wall of a sleeve, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an underwater cable dragging auxiliary device fixed on the inner wall of a sleeve, comprising: a sleeve, a first fixed frame with a detachable hollow structure is provided in the sleeve along the axial direction, and guide mechanisms for the wire are provided in three directions inside the first fixed frame, the guide mechanism includes rollers and a first mounting shaft arranged in sequence from the inside to the outside, and a wire channel for the wire to pass through is formed between the three rollers.

[0006] Preferably, a spring for axial length adjustment is installed between the roller and the first mounting shaft, and a mounting seat and a guide rod are sequentially provided on the side of the roller close to the first mounting shaft. A telescopic hole for accommodating the extension and contraction of the guide rod is opened on the first mounting shaft, and the spring is arranged between the mounting seat and the first mounting shaft, and the spring is sleeved on the guide rod.

[0007] Preferably, a second fixed frame can be detachably installed on one side of the first fixed frame, and roller seats for auxiliary guiding the wires are installed in three directions on the inner side of the second fixed frame. A second mounting shaft for rotation is provided on the axial center line of the roller seat, and the three mounting shafts are all arranged on the inner wall of the second fixed frame.

[0008] Preferably, a plurality of recessed holes are provided in a rectangular array on the outer wall of the roller seat, and a ball extending to the outside of the roller seat is rotatably mounted in each of the recessed holes.

[0009] Preferably, an anti-blocking part is also installed on the outside of the first fixed frame. The anti-blocking part includes two ring edges whose inner diameters decrease from the inside to the outside. A plurality of round rods are arranged at equal distances between the two ring edges. One of the ring edges is welded to the inner wall of the sleeve, and the other ring edge is arranged on the outer wall of the first fixed frame.

[0010] Preferably, a plurality of fastening bolts are further provided on the outer wall of the sleeve, and one end of the plurality of fastening bolts is threadedly connected and extends to various directions of the first fixing frame and the second fixing frame.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The utility model greatly reduces the friction of the underwater cable during long-distance dragging and laying by adding a first fixed frame and three rollers, thereby increasing the service life of the cable and improving the safety and reliability during the cable dragging process.

[0013] (2) The utility model uses an additional spring, a guide rod and a mounting seat to prevent the roller from pressing excessively on the wire through the elastic force of the spring, thereby preventing the roller from pressing excessively on the wire.

[0014] (3) The utility model greatly improves the speed of long-distance underwater cable laying by adding a second fixed frame and three roller seats, and prevents cable blockage caused by dragging the cable. The automatic guide component prevents such a situation from happening again.

[0015] (4) The utility model greatly improves the corrosion resistance of the cable when it is placed underwater for a long time by adding an anti-blocking part, so that the cable is located in the center of the sleeve, avoiding the accumulation of underwater silt on the cable, thereby further improving the service life and corrosion resistance of the underwater cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the first stereogram of the utility model;

[0017] Figure 2 This is the second stereoscopic view of the present utility model;

[0018] Figure 3 This is the third stereogram of the present utility model;

[0019] Figure 4 This is the fourth stereogram of the present utility model;

[0020] Figure 5 This is the fifth stereogram of the present utility model;

[0021] Figure 6 This is a schematic diagram of the cooperation of the guide rod, telescopic hole and spring of the utility model;

[0022] In the figure: 1. Sleeve; 2. Fastening bolt; 3. First fixed frame; 4. Second fixed frame; 5. Round rod; 6. Ring edge; 7. Recessed hole; 8. Ball; 9. Roller seat; 10. Guide rod; 11. First mounting axis; 12. Spring; 13. Mounting seat; 14. Roller; 15. Second mounting axis; 16. Telescopic hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] refer to Figure 1-2 and Figure 4 As shown, the utility model provides an underwater cable dragging auxiliary device fixed on the inner wall of a sleeve, comprising: a sleeve 1, a first fixed frame 3 with a detachable hollow structure is provided in the axial direction of the sleeve 1, and guide mechanisms for the wire are provided in three directions inside the first fixed frame 3. The guide mechanism includes rollers 14 and a first mounting shaft 11 arranged in sequence from the inside to the outside, and a wire channel for the wire to pass through is formed between the three rollers 14.

[0025] Combine Figure 1-2 and Figure 5As shown, a second fixed frame 4 can be detachably installed on one side of the first fixed frame 3 of this embodiment, and roller seats 9 for auxiliary guiding of the wires are installed in three directions on the inner side of the second fixed frame 4. A second mounting shaft 15 for rotation is provided on the axial center line of the roller seat 9, and the three mounting shafts are all arranged on the inner wall of the second fixed frame 4.

[0026] The installation steps of this utility model are as follows:

[0027] Step 1: Calibrate the dimensions of the various components of the device according to the dimensions of the underwater cable to be towed, and calibrate the steel round rod funnel-shaped anti-blocking component, the cable fixing spring roller component, and the cable fixing spring ball component that meet the engineering requirements.

[0028] Step 2: Assemble the various parts according to the above content and complete the assembly of the fixed cable roller component and the fixed cable ball component.

[0029] Step 3: Weld and fix the inner wall of the sleeve 1, and weld and fix the various components; first weld and fix the steel round rod funnel-type anti-blocking guide component to the inner wall of the sleeve 1, then weld and fix the fixed cable spring roller component to the inner wall of the sleeve 1 and the small diameter of the steel round rod funnel-type anti-blocking guide component, and then weld and fix the fixed cable spring ball component to the inner wall of the sleeve 1 and the fixed cable spring roller component.

[0030] Step 4: After welding is completed, bolts can be added to the fixed cable spring roller component and the fixed cable spring ball component to connect them to the sleeve 1 to increase safety and reliability.

[0031] The workflow of this utility model is as follows:

[0032] Step 1: Place the sleeve 1 with the device installed and the cable pulling traction head into the predetermined underwater position in advance. The installation spacing of the device is determined by the project distance and actual conditions. After placing it underwater, connect the traction head to the cable.

[0033] Step 2: The traction head starts to drag the underwater cable, and the cable will pass through the anti-blocking member of each device, the first fixed frame 3 and the second fixed frame 4 in sequence.

[0034] Step 3: Under the traction of the traction head, repeat the work of step 2 until the underwater cable is dragged to the predetermined position and the underwater cable laying project is completed.

[0035] In summary, the underwater cable (submarine cable) dragging auxiliary device fixed on the inner wall of the sleeve 1 of the present invention greatly reduces the friction of the underwater cable during the dragging and laying process, and realizes the conversion of sliding friction into rolling friction; greatly increases the long-term working life of the cable after long-distance underwater cable laying, improves the corrosion resistance of the cable, and improves the reliability and safety in actual engineering; greatly improves the speed and efficiency of underwater cable laying, and also increases the speed of cable replacement; low cost and high benefit.

[0036] Further, in order to prevent the roller 14 from being excessively pressed onto the cable, refer to Figure 6 As shown, a spring 12 for axial length adjustment is installed between the roller 14 and the first mounting shaft 11. A mounting seat 13 and a guide rod 10 are sequentially provided on the side of the roller 14 near the first mounting shaft 11. A telescopic hole 16 is provided on the first mounting shaft 11 to accommodate the extension and contraction of the guide rod 10. The spring 12 is arranged between the mounting seat 13 and the first mounting shaft 11, and the spring 12 is sleeved on the guide rod 10. The mounting seat 13 provides a mounting position for the guide rod 10 on the roller 14, and the telescopic hole 16 allows the guide rod 10 to extend and retract on the first mounting shaft 11. The elastic force of the spring 12 allows the roller 14 to automatically approach the first mounting shaft 11 when under pressure, preventing the roller 14 from excessively crushing the cable.

[0037] Further, in order to reduce the rolling friction between the roller seat 9 and the cable, refer to Figure 5 As shown, the outer wall of the roller seat 9 is provided with a plurality of recessed holes 7 in a rectangular array. A ball bearing 8 extending to the outside of the roller seat 9 is rotatably mounted in each recessed hole 7. When the cable passes through the plurality of roller seats 9, the ball bearing 8 in contact with the cable rotates in the recessed hole 7, thereby reducing the friction between the cable and the roller seat 9.

[0038] In this utility model, combined with Figure 3 As shown, an anti-blocking part is also installed on the outside of the first fixed frame 3 of this embodiment. The anti-blocking part includes two ring edges 6 whose inner diameters decrease from the inside to the outside. A plurality of round rods 5 are arranged at equal distances between the two ring edges 6. One of the ring edges 6 is welded to the inner wall of the sleeve 1, and the other ring edge 6 is arranged on the outer wall of the first fixed frame 3.

[0039] As described above, when using the anti-blocking member provided by the present invention, the multiple round rods 5 are formed into a funnel-shaped structure through two ring edges 6, which facilitates the entry of the cable into the interior of the sleeve 1 and prevents foreign objects from entering through the funnel-shaped structure.

[0040] In this utility model, combined with Figure 1 As shown, a plurality of fastening bolts 2 are further provided on the outer wall of the sleeve 1 of this embodiment, and one end of the plurality of fastening bolts 2 are respectively threadedly connected and extended to various directions of the first fixing frame 3 and the second fixing frame 4.

[0041] As mentioned above, when the fastening bolts 2 provided by the present invention are used, the first fixing frame 3 and the second fixing frame 4 can be detachably mounted on the sleeve 1 through the fastening bolts 2 , so that they can be reused later.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater cable pulling auxiliary device fixed to the inner wall of a sleeve, characterized in that: include: A sleeve (1) is provided with a first fixed frame (3) of a detachable hollow structure in the axial direction of the sleeve (1), and guide mechanisms for wires are provided in three directions inside the first fixed frame (3), the guide mechanisms comprising rollers (14) and a first mounting shaft (11) sequentially provided from the inside to the outside, and a wire channel for the wire to pass through is formed between the three rollers (14).

2. The underwater cable pulling auxiliary device fixed to the inner wall of the sleeve according to claim 1, characterized in that: A spring (12) for adjusting the axial length is also installed between the roller (14) and the first installation shaft (11); a mounting seat (13) and a guide rod (10) are sequentially provided on the side of the roller (14) close to the first installation shaft (11); a telescopic hole (16) for accommodating the telescopic movement of the guide rod (10) is provided on the first installation shaft (11); the spring (12) is arranged between the mounting seat (13) and the first installation shaft (11), and the spring (12) is sleeved on the guide rod (10).

3. The underwater cable pulling auxiliary device fixed to the inner wall of the sleeve according to claim 1, characterized in that: A second fixed frame (4) is detachably mounted on one side of the first fixed frame (3), and roller seats (9) for assisting in guiding the conductor are mounted on three directions of the inner side of the second fixed frame (4). A second mounting shaft (15) for rotation is provided on the axis of the roller seat (9), and the three mounting shafts are all arranged on the inner wall of the second fixed frame (4).

4. The underwater cable pulling auxiliary device fixed to the inner wall of the sleeve according to claim 3, characterized in that: A plurality of recessed holes (7) are provided in a rectangular array on the outer wall of the roller seat (9), and a ball (8) extending to the outside of the roller seat (9) is rotatably mounted in each recessed hole (7).

5. The underwater cable pulling auxiliary device fixed to the inner wall of the sleeve according to claim 1, characterized in that: An anti-blocking part is also installed on the outside of the first fixed frame (3), and the anti-blocking part includes two ring edges (6) whose inner diameters decrease from the inside to the outside. A plurality of round bars (5) are arranged at equal distances between the two ring edges (6), one of the ring edges (6) is welded to the inner wall of the sleeve (1), and the other ring edge (6) is arranged on the outer wall of the first fixed frame (3).

6. The underwater cable pulling auxiliary device fixed to the inner wall of the sleeve according to claim 3, characterized in that: A plurality of fastening bolts (2) are also provided on the outer wall of the sleeve (1), and one end of the plurality of fastening bolts (2) is respectively threadedly connected and extended to various directions of the first fixed frame (3) and the second fixed frame (4).

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