Offshore large-height-difference cable laying method

Abstract

The invention relates to an offshore large-height-difference cable laying method, which is based on a cable reel turnover device, and comprises a base, a plurality of first supporting rods, a first fixing ring, a main shaft, a bearing disc, a plurality of second supporting rods, a second fixing ring, a first lifting lug and a limiting plate, the outer wall of the base is connected with the multiple first supporting rods at equal intervals, and the outer ends of the multiple first supporting rods are connected with the first fixing ring; the base is rotatably connected with the main shaft, and the laying method comprises the following steps: step S1, installing cable laying auxiliary equipment on a bridge; s2, transporting the cable to a construction site; s3, turning over the cable reel by using a turning-over device; s4, releasing the cable and starting laying; and S5, cable laying is completed. The offshore large-height-difference cable laying method provided by the invention aims to overcome the existing defects, the operation is simple, and the laying time is saved.

Description

Technical Field

[0001] The invention relates to a method for laying offshore cables with large height differences. Background Art

[0002] A cable is a device for transmitting electrical energy or signals, usually consisting of several or several groups of wires.

[0003] Some cables are made of one or more conductors insulated from each other and covered with an insulating protective layer, which transmit electricity or information from one place to another.

[0004] Some cables are usually made of several or several groups of wires (at least two wires in each group) twisted together like ropes. Each group of wires is insulated from each other and often twisted around a center, with a highly insulating covering on the outside. The cable has the characteristics of being powered inside and insulated outside.

[0005] Cables include power cables, control cables, compensation cables, shielded cables, high temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of wire and insulation layer, used to connect circuits, electrical appliances, etc.

[0006] There are different methods for laying existing cables, but all of them have the disadvantages of being cumbersome, time-consuming and labor-intensive. Therefore, a method for laying offshore cables with large elevation differences is proposed to address the above problems. Summary of the invention

[0007] The purpose of the present invention is to overcome the existing defects and provide a method for laying offshore cables with large height differences, which is simple to operate and saves time in laying.

[0008] The technical solution to achieve the above object is: a method for laying cables with large height differences at sea, based on a cable drum turning device, comprising a base, a plurality of first support rods, a first fixing ring, a main shaft, a bearing plate, a plurality of second support rods, a second fixing ring, a first lifting lug and a limit plate;

[0009] The outer wall of the base is connected to a plurality of the first support rods at equal distances, and the outer ends of the plurality of the first support rods are connected to the first fixing ring; the base is rotatably connected to the main shaft, the side wall of the lower end of the main shaft is connected to the bearing plate, and the side wall of the main shaft above the bearing plate is connected to a plurality of the second support rods at equal distances, and the outer ends of the plurality of the second support rods are connected to the second fixing ring; the side wall of the main shaft is connected to the limit plate, and the limit plate is located above the plurality of the second support rods; the upper end of the main shaft is connected to the first lifting ear;

[0010] Laying methods include:

[0011] Step S1, installing cable laying auxiliary equipment on the bridge;

[0012] Step S2, transporting the cable to the construction site;

[0013] Step S3, turning over the cable drum using a turning device;

[0014] Step S4, releasing the cable to start laying;

[0015] Step S5, cable laying is completed.

[0016] The auxiliary equipment for laying cables installed on the bridge includes:

[0017] Step S11, setting a winch at the end of the cable laying on the bridge to provide traction for the cable laying;

[0018] Step S12, a conveying roller is arranged every two meters on the bridge.

[0019] The step S2, transporting the cable to the construction site comprises:

[0020] Step S21, the cable is transported to the construction site by a transport ship;

[0021] Step S22, the central axis hanging beam is used to penetrate the cable drum for hoisting, and the two ends of the central axis hanging beam are respectively connected to the two ends of the cable landing balance beam through a vertical rigging, and the cable landing balance beam is connected to the lifting device to hoist the cable drum to the landing position.

[0022] The step S3, turning over the cable drum using a turning device, comprises:

[0023] Step S31, connect a second lifting ear to a first support rod, connect the second lifting ear to a second hook, connect the lower end of the first hook to the main shaft, level the turning device by adjusting the first hook and the second hook, insert the main shaft into the cable drum by manual adjustment with a person, then move the first hook and connect the first hook to the first lifting ear;

[0024] Step S32, the first hook and the second hook are retracted simultaneously to lift the cable drum into the air;

[0025] Step S33, through the coordination and adjustment of the first hook and the second hook, the first hook continues to shrink and the second hook is released, so that the cable drum is turned over to a vertical state;

[0026] Step S34: the first hook and the second hook are released simultaneously, and the turning device and the cable drum in the vertical state are placed on the ground, thereby completing the turning of the cable drum.

[0027] The step S4, releasing the cable to start laying, comprises:

[0028] Step S41, manually pushing the second fixing ring to rotate the second support rod and the load-bearing plate, so that the sleeved cable drum rotates to release the cable wound on the cable drum;

[0029] Step S42, one end of the wire rope is connected to a hoist at the end, and the other end of the wire rope is connected to the released cable. The hoist rotates and reels the wire rope, driving the cable to be released from the cable drum for laying;

[0030] Step S43, after the cable laying is completed, use stainless steel plastic-coated rolled strips to tie the cables to the cable tray one by one, with a tying interval of 1.5m.

[0031] Preferably, a countersunk hole is provided on the upper end surface of the base, a bearing is arranged in the countersunk hole, and the lower end of the main shaft is connected to the bearing.

[0032] Preferably, a bayonet is provided on the side wall of the lower end of the main shaft for connecting the load-bearing plate.

[0033] Preferably, the first support rod and the second support rod are both made of profiled steel.

[0034] Preferably, a plurality of diagonal braces are connected to the lower end surface of the load-bearing plate at equal distances from the circumference, a slide groove is provided on the upper end surface of the base, a slider is connected to the lower end of each diagonal brace, and the slider is slidably connected in the slide groove.

[0035] Preferably, a threaded hole is provided at the upper end of the main shaft, the first lifting ear is connected to a fixing plate, the lower end of the fixing plate is connected to a stud, and the stud is threadedly connected in the threaded hole.

[0036] The beneficial effects of the present invention are as follows: the method for laying cables at sea with large height differences is to install auxiliary equipment for laying cables on the bridge; then transport the cables to the construction site and use a turning device to flip the cable drum; then release the cables to start laying until the cable laying is completed. The operation process is simple and convenient, saving time, labor and cost.

[0037] The cable drum turning device connects a second lifting ear to a first support rod, connects the second lifting ear to a second hook, inserts the main shaft into the cable drum, connects the first lifting ear to the first lifting hook, and realizes the turning of the cable drum through the coordination and adjustment of the first lifting hook and the second lifting hook, which facilitates the laying of cables, is simple to operate, increases work efficiency, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the laying method of the present invention;

[0039] Figure 2 It is a schematic diagram of the application connection of the cable reel turning device of the present invention;

[0040] Figure 3 is a detailed view of the cable drum turning device of the present invention;

[0041] Figure 4 It is a detailed view of the position of the base of the present invention;

[0042] Figure 5 is a schematic diagram of the cable reel turning device of the present invention from another viewing angle;

[0043] Figure 6 yes Figure 3 Enlarged view of point A in the middle;

[0044] Figure 7 It is a hoisting schematic diagram of the present invention;

[0045] Figure 8 It is a schematic diagram of the turning over of the cable drum turning device of the present invention;

[0046] Fig. 9 is a schematic diagram of step S1 of the laying method of the present invention;

[0047] Fig.10 is a schematic diagram of step S2 of the laying method of the present invention;

[0048] Fig.11 is a schematic diagram of step S3 of the laying method of the present invention;

[0049] Fig.12 It is a schematic diagram of step S4 of the laying method of the present invention.

[0050] In the figure: 1. base; 2. first support rod; 3. first fixing ring; 4. main shaft; 5. load-bearing plate; 6. second support rod; 7. second fixing ring; 8. first lifting ear; 9. limit plate; 10. bearing; 11. bayonet; 12. diagonal brace; 13. slide groove; 14. threaded hole; 15. fixing plate; 16. stud; 17. second lifting ear; 18. second hook; 19. first hook. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] The present invention will be further described below in conjunction with the accompanying drawings.

[0053] like Figure 1-12 As shown, a method for laying cables with large height differences at sea is based on a cable drum turning device, comprising a base 1, multiple first support rods 2, a first fixing ring 3, a main shaft 4, a load-bearing plate 5, multiple second support rods 6, a second fixing ring 7, a first lifting lug 8 and a limit plate 9; the outer wall of the base 1 is equidistantly connected to multiple first support rods 2, and the outer ends of the multiple first support rods 2 are connected to the first fixing ring 3; the base 1 is rotatably connected to the main shaft 4, a countersunk hole is provided on the upper end surface of the base 1, a bearing 10 is arranged in the countersunk hole, and the lower end of the main shaft 4 is connected to the bearing 10.

[0054] Specifically, the side wall at the lower end of the main shaft 4 is connected to the bearing plate 5, and a bayonet 11 is provided on the side wall at the lower end of the main shaft 4 for connecting the bearing plate 5. A plurality of second support rods 6 are connected to the side wall of the main shaft 4 above the bearing plate 5 at equal distances, and the outer ends of the plurality of second support rods 6 are connected to the second fixing ring 7; a limit plate 9 is connected to the side wall of the main shaft 4, and the limit plate 9 is located above the plurality of second support rods 6; and a first lifting lug 8 is connected to the upper end of the main shaft 4.

[0055] Specifically, the first support rod 2 and the second support rod 6 are both made of profiled steel. There are two second fixing rings 7.

[0056] Specifically, a plurality of diagonal braces 12 are connected to the lower end surface of the load-bearing plate 5 at equal distances, a slide groove 13 is provided on the upper end surface of the base 1, and a slider is connected to the lower end of each diagonal brace 12, and the slider is slidably connected in the slide groove 13. The diagonal brace 12 can play a role in auxiliary support of the load-bearing plate 5, and the slider is slidably connected in the slide groove 13 without affecting the rotation of the load-bearing plate 5.

[0057] Specifically, a threaded hole 14 is provided at the upper end of the main shaft 4, the first lifting ear 8 is connected to the fixing plate 15, the lower end of the fixing plate 15 is connected to the stud 16, and the stud 16 is threadedly connected in the threaded hole 14. By rotating the stud 16 out of the main shaft 4, the length of the main shaft 4 can be extended, and the device can be mounted on cable drums of different sizes, making it more adaptable.

[0058] like Figure 7As shown, when turning over the cable drum, a second lifting ear 17 is connected to a first support rod 2, the second lifting ear 17 is connected to the second hook 18, the lower end of the first hook 19 is connected to the main shaft 4, the turning device is leveled by adjusting the first hook 19 and the second hook 18, and the main shaft 4 is inserted into the cable drum by manual adjustment of the personnel, and then the first hook 19 is moved and connected to the first lifting ear 8; the first hook 19 and the second hook 18 are retracted at the same time to lift the cable drum into the air; through the coordination and adjustment of the first hook 19 and the second hook 18, the first hook 19 continues to retract, and the second hook 18 is released to turn the cable drum to a vertical state; the first hook 19 and the second hook 18 are released at the same time, and the turning device and the cable drum in the vertical state are placed on the ground, completing the turning of the cable drum. After the turning is completed, the second fixing ring 7 is manually pushed to rotate the second support rod 6 and the bearing plate 5, so that the sleeved cable drum rotates to release the cable wound on the cable drum, and the cable is manually laid by the worker.

[0059] like Figure 1 and Figure 9-12 As shown, the laying method includes:

[0060] Step S1, installing cable laying auxiliary equipment on the bridge;

[0061] Step S2, transporting the cable to the construction site;

[0062] Step S3, turning over the cable drum using a turning device;

[0063] Step S4, releasing the cable to start laying;

[0064] Step S5, cable laying is completed.

[0065] The auxiliary equipment for laying cables installed on the bridge includes:

[0066] Step S11, setting a winch at the end of the cable laying on the bridge to provide traction for the cable laying;

[0067] Step S12, a conveying roller is arranged every two meters on the bridge.

[0068] The step S2, transporting the cable to the construction site comprises:

[0069] Step S21, the cable is transported to the construction site by a transport ship;

[0070] Step S22, the central axis hanging beam is used to penetrate the cable drum for hoisting, and the two ends of the central axis hanging beam are respectively connected to the two ends of the cable landing balance beam through a vertical rigging, and the cable landing balance beam is connected to the lifting device to hoist the cable drum to the landing position.

[0071] Step S3, turning over the cable drum using a turning device comprises:

[0072] Step S31, connect the second lifting ear 17 to the first support rod 2, connect the second lifting ear 17 to the second hook 18, connect the lower end of the first hook 19 to the main shaft 4, lay the turning device flat by adjusting the first hook 19 and the second hook 18, and insert the main shaft 4 into the cable drum through manual adjustment by personnel, then move the first hook 19 and connect the first hook 19 to the first lifting ear 8;

[0073] Step S32, the first hook 19 and the second hook 18 are retracted simultaneously to lift the cable drum into the air;

[0074] Step S33, through the coordination and adjustment of the first hook 19 and the second hook 18, the first hook 19 continues to shrink and the second hook 18 is released, so that the cable drum is turned over to a vertical state;

[0075] Step S34: the first hook 19 and the second hook 18 are released simultaneously, and the turning device and the cable drum in the vertical state are placed on the ground, thereby completing the turning of the cable drum.

[0076] Step S4, releasing the cable to start laying includes:

[0077] Step S41, manually push the second fixing ring 7 to rotate the second support rod 6 and the load-bearing plate 5, so that the sleeved cable drum rotates to release the cable wound on the cable drum,

[0078] Step S42: connect one end of the wire rope to the end of the hoist, connect the other end of the wire rope to the released cable, and rotate the hoist to reel in the wire rope, driving the cable to be released from the cable drum for laying; the cable laying speed is less than 15m / min. When laying the cable, a dedicated person is set up along the laying path to supervise. When the cable is separated from the conveying roller, the hoist must be stopped and manually corrected before the hoist can be resumed.

[0079] Step S43: After the cable laying is completed, the cables are tied to the cable bridge one by one using stainless steel plastic-coated rolled strips, with a tying spacing of 1.5m. When there is a vertical height difference on the cable path, a cable climbing frame is used to complete the cable laying construction.

[0080] This offshore large height difference cable laying method is to install cable laying auxiliary equipment on the bridge; then transport the cable to the construction site and use the turning device to flip the cable drum; then release the cable to start laying until the cable laying is completed. The operation process is simple and convenient, saving time, labor and cost.

[0081] The cable drum turning device connects the second lifting ear 17 to a first support rod 2, the second lifting ear 17 is connected to the second hook 18, the main shaft 4 is inserted into the cable drum, and the first lifting ear 8 is connected to the first hook 19. The cable drum is turned over by adjusting the coordination of the first hook 19 and the second hook 18, which facilitates the laying of cables, is simple to operate, increases work efficiency, and saves costs.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for laying cables with large height differences at sea, based on a cable drum turning device, comprising a base (1), a plurality of first support rods (2), a first fixing ring (3), a main shaft (4), a bearing plate (5), a plurality of second support rods (6), a second fixing ring (7), a first lifting lug (8) and a limit plate (9); The outer wall of the base (1) is connected to a plurality of first support rods (2) at equal distances, and the outer ends of the plurality of first support rods (2) are connected to the first fixing ring (3); the base (1) is rotatably connected to the main shaft (4), the lower side wall of the main shaft (4) is connected to the bearing plate (5), the side wall of the main shaft (4) above the bearing plate (5) is connected to a plurality of second support rods (6) at equal distances, and the outer ends of the plurality of second support rods (6) are connected to the second fixing ring (7); the side wall of the main shaft (4) is connected to the limiting plate (9), and the limiting plate (9) is located above the plurality of second support rods (6); the upper end of the main shaft (4) is connected to the first lifting ear (8); It is characterized in that Laying methods include: Step S1, installing cable laying auxiliary equipment on the bridge; Step S2, transporting the cable to the construction site; Step S3, turning over the cable drum using a turning device; Step S4, releasing the cable to start laying; Step S5, cable laying is completed.

2. The method for laying offshore cables with large height differences according to claim 1, characterized in that: The auxiliary equipment for laying cables installed on the bridge includes: Step S11, setting a winch at the end of the cable laying on the bridge to provide traction for the cable laying; Step S12, a conveying roller is arranged every two meters on the bridge.

3. The method for laying offshore cables with large height differences according to claim 2, characterized in that: The step S2, transporting the cable to the construction site comprises: Step S21, the cable is transported to the construction site by a transport ship; Step S22, the central axis hanging beam is used to penetrate the cable drum for hoisting, and the two ends of the central axis hanging beam are respectively connected to the two ends of the cable landing balance beam through a vertical rigging, and the cable landing balance beam is connected to the lifting device to hoist the cable drum to the landing position.

4. The method for laying offshore cables with large height differences according to claim 3, characterized in that: The step S3, turning over the cable drum using a turning device, comprises: Step S31, connect the second lifting ear (17) to the first support rod (2), connect the second lifting ear (17) to the second hook (18), connect the lower end of the first hook (19) to the main shaft (4), adjust the first hook (19) and the second hook (18) to level the turning device, and manually adjust the main shaft (4) to insert it into the cable drum, then move the first hook (19) and connect the first hook (19) to the first lifting ear (8); Step S32, the first hook (19) and the second hook (18) are retracted simultaneously to lift the cable drum into the air; Step S33, by adjusting the coordination between the first hook (19) and the second hook (18), the first hook (19) continues to retract and the second hook (18) is released, so that the cable drum is turned over to a vertical state; Step S34, the first hook (19) and the second hook (18) are released simultaneously, and the turning device and the cable drum in the vertical state are placed on the ground, thereby completing the turning of the cable drum.

5. The method for laying offshore cables with large height differences according to claim 4, characterized in that: The step S4, releasing the cable to start laying, comprises: Step S41, manually pushing the second fixing ring (7) to rotate the second support rod (6) and the load-bearing plate (5), so that the sleeved cable drum rotates to release the cable wound on the cable drum, Step S42, one end of the wire rope is connected to a hoist at the end, and the other end of the wire rope is connected to the released cable. The hoist rotates and reels the wire rope, driving the cable to be released from the cable drum for laying; Step S43, after the cable laying is completed, use stainless steel plastic-coated rolled strips to tie the cables to the cable tray one by one, with a tying interval of 1.5m.

6. The method for laying offshore cables with large height differences according to claim 1, characterized in that: A countersunk hole is provided on the upper end surface of the base (1), a bearing (10) is arranged in the countersunk hole, and the lower end of the main shaft (4) is connected to the bearing (10).

7. The method for laying offshore cables with large height differences according to claim 1, characterized in that: A bayonet (11) is provided on the side wall at the lower end of the main shaft (4) for connecting with the load-bearing plate (5).

8. The method for laying offshore cables with large height differences according to claim 1, characterized in that: The first support rod (2) and the second support rod (6) are both made of profiled steel.

9. The method for laying offshore cables with large height differences according to claim 1, characterized in that: The lower end surface of the load-bearing plate (5) is equidistantly connected to a plurality of diagonal braces (12); a slide groove (13) is provided on the upper end surface of the base (1); the lower end of each diagonal brace (12) is connected to a sliding block, and the sliding block is slidably connected in the sliding groove (13).

10. The method for laying offshore cables with large height differences according to claim 1, characterized in that: A threaded hole (14) is provided at the upper end of the main shaft (4); the first lifting ear (8) is connected to a fixing plate (15); a stud (16) is connected to the lower end of the fixing plate (15); and the stud (16) is threadedly connected in the threaded hole (14).

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