CN115395442A - Submarine cable maintenance method - Google Patents
Submarine cable maintenance method Download PDFInfo
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- CN115395442A CN115395442A CN202211123488.8A CN202211123488A CN115395442A CN 115395442 A CN115395442 A CN 115395442A CN 202211123488 A CN202211123488 A CN 202211123488A CN 115395442 A CN115395442 A CN 115395442A
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- submarine cable
- cable
- submarine
- spare
- cutting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/10—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
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- Laying Of Electric Cables Or Lines Outside (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention relates to a submarine cable maintenance method, which comprises the following steps: the working ship is operated to a maintenance area, and a diver launches water to determine the actual damaged position of the submarine cable; shearing the submarine cable from an actual damaged position, and respectively marking two sections of submarine cables formed after shearing as a first submarine cable and a second submarine cable; after the first submarine cable is salvaged to a working ship and a fault section is cut off, the first submarine cable is hoisted back to the sea; after the second submarine cable is salvaged to the working ship and the fault section is cut off, a section of standby cable is led out from the bottom of the winch, so that the leading-out end of the standby cable is connected with the tail end of the second submarine cable through a first connector; analyzing and calculating the length of the spare cable to be laid; and fishing the first submarine cable to a working ship, cutting off a spare cable from the winch, and connecting the cut spare cable with the first submarine cable through a second joint. The invention can effectively improve the maintenance operation efficiency of the submarine cable and is beneficial to improving the operation safety.
Description
Technical Field
The invention relates to the technical field of submarine cable maintenance, in particular to a submarine cable maintenance method.
Background
With the rapid development of offshore wind power projects, submarine cables are more and more widely applied, the number of the submarine cables to be laid is more and more, and with the increase of the number of the submarine cables, the maintenance work of the submarine cables is also increased. However, the existing large-diameter submarine cable maintenance mode consumes a large amount of manpower, is inconvenient to operate, has low overall maintenance efficiency, and cannot meet the use requirement.
Disclosure of Invention
Therefore, the invention aims to overcome the defect of low maintenance efficiency of the submarine cable maintenance mode in the prior art.
In order to solve the technical problem, the invention provides a submarine cable maintenance method, which comprises the following steps:
s1) operating a work ship to a maintenance area, and launching a diver to determine the actual damaged position of a submarine cable;
s2) cutting off the submarine cable from an actual damaged position, and marking two sections of submarine cables formed after cutting off as a first submarine cable and a second submarine cable respectively;
s3) salvaging the first submarine cable to a working ship for fault verification to determine a fault section, cutting off the fault section on the first submarine cable, and hoisting the first submarine cable back to the sea after binding a sheath at the tail end of the first submarine cable;
s4) salvaging the second submarine cable to a working ship for fault verification to determine a fault section, cutting off the fault section on the second submarine cable, and leading out a section of spare cable from the bottom of a winch arranged on a deck of the working ship, so that the leading-out end of the spare cable is connected with the tail end of the second submarine cable with the fault section cut off through a first connector;
s5) hoisting the second submarine cable back to the sea, launching the second submarine cable by a diver, then drawing the spare cable to lay towards the direction of the first submarine cable until the second submarine cable reaches the position of the first submarine cable, and calculating the length of the laid spare cable;
s6) salvaging the first submarine cable to a working ship, cutting off the spare cable from the winch, wherein the length of the spare cable obtained after cutting off is equal to the length of the spare cable calculated in the step S5), and connecting the spare cable obtained after cutting off with the first submarine cable through a second connector.
In one embodiment of the present invention, the method for determining the damaged position of the submarine cable by the diver launching in step S1) comprises: the diver dives to the seabed to remove the sludge covered on the submarine cable in the area until the damaged position of the submarine cable is exposed, and then spray flushing treatment is carried out on two sides of the damaged position to remove the covering sundries on the submarine cable on the two sides of the damaged position.
In one embodiment of the invention the sludge covering the submarine cable is removed by means of manual or mechanical blowing.
In one embodiment of the present invention, the method of cutting the submarine cable from the damaged position in step S2) is: the cutting device is fed into the sea floor by a crane and the submarine cable is cut from the damaged position by the cutting device.
In one embodiment of the invention, the end of the first sea cable is also bound with a buoy before the first sea cable is hoisted back into the sea in step S3).
In one embodiment of the present invention, in step S3), after the fault section on the first submarine cable is cut off, the end of the first submarine cable needs to be subjected to waterproof treatment, and then a sheath is bound to the end of the first submarine cable.
In one embodiment of the invention, the fault verification of the first and second sea cables is performed in a sea cable repair box, which is arranged on the work vessel.
In one embodiment of the invention, the wind speed of the sea area where the working ship is located is not more than 5 grades, and the swell is not more than 0.5m.
In one embodiment of the invention, the winch comprises a lower base and an upper base, the lower base being fixed to the deck of the work vessel.
In one embodiment of the invention, the winch is provided with a back-twist pay-off stand, and the standby cable is released and led out from the back-twist pay-off stand.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the submarine cable maintenance method can effectively improve the maintenance operation efficiency of submarine cables, reduce the construction cost and is beneficial to improving the operation safety.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.
FIG. 1 is a view showing a state where a submarine cable is cut from an actually damaged position according to the present invention;
FIG. 2 is a state diagram of the first sea cable being salvaged in the present invention;
FIG. 3 is a state diagram of the present invention fishing a second sea cable;
FIG. 4 is a state diagram of the present invention for fault verification of the second sea cable;
FIG. 5 is a view showing a state where a second sea cable to which a reserve cable is connected is lowered into the sea in the present invention;
FIG. 6 is a state diagram of the present invention in which a reserve cable and a first submarine cable are connected by a second joint;
the specification reference numbers indicate: 1. a work boat; 2. hoisting a machine; 21. a wire rope; 22. a spreader; 3. a winch; 4. a submarine cable maintenance box; 5. a shearing device; 6. a seabed; 7. a first sea cable; 8. a second sea cable; 9. a spare cable; 10. a first joint; 11. a second joint.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The embodiment discloses a submarine cable maintenance method, which is characterized in that submarine cable maintenance is carried out by means of a working ship 1, wherein the working ship 1 is provided with a crane 2, a winch 3, a submarine cable maintenance box 4 and the like.
The submarine cable maintenance method comprises the following steps:
s1) estimating the approximate position of the damaged submarine cable, dividing the position area into a maintenance area, running a workboat 1 to the maintenance area, and launching a diver to determine the actual damaged position of the submarine cable;
s2) as shown in figure 1, cutting off the submarine cable from an actual damaged position, and marking two sections of submarine cables formed after cutting off as a first submarine cable 7 and a second submarine cable 8 respectively;
in addition, a waterproof assembly is required to be installed at the cut position after the submarine cable is cut from the actual damaged position;
s3) as shown in the figure 2, salvaging the first submarine cable to the working ship 1 by using the crane 2 to carry out fault verification so as to determine a fault section, cutting off the fault section on the first submarine cable 7, and hoisting the first submarine cable 7 back to the sea by using the crane 2 after binding a sheath at the tail end of the first submarine cable 7;
the sheath can be a steel sheath;
s4) as shown in fig. 3 to 4, salvaging the second submarine cable 8 to the working vessel 1 by the crane 2 to perform fault verification to determine a fault section, cutting off the fault section on the second submarine cable 8, and leading out a section of the reserve cable 9 from the bottom of the winch 3 placed on the deck of the working vessel 1, so that the leading-out end of the reserve cable 9 and the tail end of the second submarine cable 8 after cutting off the fault section are connected by the first joint 10;
the winch 3 is installed on the deck in the mode, the spare cable 9 is directly led out from the bottom of the winch 3, namely, the spare cable 9 can be led out close to the deck, the spare cable 9 is not required to be stored and released through high-altitude back-twist operation, operation safety and operation convenience are greatly improved, and meanwhile, equipment is more convenient to arrange.
Specifically, when the second submarine cable 8 is fished, the second submarine cable 8 can be fished by the crane 2 to be hung to the deck through the water inlet groove of the bow of the working ship 1, and the second submarine cable 8 is pulled to the submarine cable maintenance box 4 through the winch and the tensioner for fault verification.
S5) as shown in FIG. 5, the second submarine cable 8 is hoisted back to the sea by the crane 2, a diver launches water and then pulls the spare cable 9 to lay towards the first submarine cable 7 until the spare cable reaches the first submarine cable 7, and the length of the laid spare cable 9 is calculated;
it will be appreciated that the second sea cable 8 is now connected to the reserve cable 9, and that the reserve cable 9 will continue to be released from the winch 3 when the diver pulls the reserve cable 9 forward;
s6) fishing the first submarine cable 7 to the working vessel 1, and cutting the reserve cable 9 from the winch 3, the length of the reserve cable 9 obtained after cutting being equal to the length of the reserve cable 9 calculated in the step S5), as shown in fig. 6, connecting the cut end of the reserve cable 9 obtained after cutting and the first submarine cable 7 through the second joint 11, thereby completing the maintenance of the submarine cable.
It will be understood that the operation of connecting the cut end of the spare cable 9 obtained after cutting and the first sea cable 7 by means of the second connector 11 is carried out on the working vessel 1. When the first sea cable 7 is salvaged to the working vessel 1, the reserve cable 9 on the sea bottom needs to be salvaged to a part of the working vessel 1 so as to facilitate the shearing of the reserve cable 9 and the subsequent connection with the first sea cable 7.
Through the above process, the cable fault is eliminated, and the first submarine cable 7 and the second submarine cable 8 are connected together through the reserve cable 9, one end of the reserve cable 9 is connected with the first submarine cable 7 through the first joint 10, and the other end is connected with the second submarine cable 8 through the second joint 11, so that the maintenance of the submarine cable is completed, and after the step S6), the submarine cable after maintenance is only required to be hoisted to the seabed, so that the submarine cable is placed on the seabed 6 of the seabed again.
It will be appreciated that a spreader 22 is connected to the crane 2 by a wire rope 21, so that the spreader 22 can be used to hoist the submarine cable.
In one embodiment, the method for determining the broken position of the submarine cable by the diver launching in step S1) comprises: the diver dives to the seabed to remove the sludge covered on the submarine cable in the area until the damaged position of the submarine cable is exposed, and then spray flushing treatment is carried out on two sides of the damaged position to remove the covering sundries on the submarine cable on the two sides of the damaged position.
Further, the length of the shot-blasting process was 100m.
In one embodiment, the sludge covering the submarine cable is removed by manual or mechanical blowing.
Further, when manual mud blowing or mechanical mud blowing is performed, mud blowing is performed along the vertical direction of the submarine cable so that the submarine cable can be exposed, and then mud blowing is continued along the direction of the submarine cable until the damaged position of the submarine cable is exposed.
In one embodiment, the method for shearing the submarine cable from the damaged position in step S2) comprises: the cutting device 5 is fed to the seabed by means of the crane 2 and the submarine cable is cut from the damaged position by means of the cutting device 5.
In one embodiment, before the first sea cable 7 is hoisted back into the sea in step S3), a buoy is also bound to the end of the first sea cable 7, so that the buoy floats on the surface of the sea to indicate the position of the end of the first sea cable 7, serving as a marker.
In one embodiment, in step S3), after the fault section on the first submarine cable 7 is cut off, the end of the first submarine cable 7 is subjected to waterproof test and waterproof treatment, and then a sheath is bound to the end of the first submarine cable 7.
In one embodiment, in step S4), after the fault section on the second submarine cable 8 is cut off, the end of the second submarine cable 8 needs to be subjected to a waterproof test and a waterproof treatment, and then the leading-out end of the reserve cable 9 and the end of the second submarine cable 8 after the fault section is cut off are connected through the first connector 10.
In one embodiment, the fault verification of the first sea cable 7 and the second sea cable 8 is performed in a sea cable repair box 4, which sea cable repair box 4 is arranged on the work vessel 1.
In one embodiment, the wind speed of the sea area where the work ship 1 is located is not more than 5 grades, and the surge is not more than 0.5m, so that the stability of the work ship 1 and the continuity of maintenance work during maintenance are ensured.
In one embodiment, the winch 3 comprises a lower base fixed on the deck of the work vessel 1, by means of which the stability of the winch 3 can be increased, and an upper base, by means of which the winch 3 can be prevented from being damaged by shocks.
In one embodiment, the winch 3 is provided with a back-twist pay-off rack, the spare cable 9 is released and led out from the back-twist pay-off rack, and the structure enables the winch 3 to integrate the paying-off and back-twist functions, so that the cable can be released while being back-twisted, and the cable damage caused by the deformation of the cable core is reduced. The structure enables the paying-off and the back-twist to be integrated, the high-altitude back-twist frame is not required to be additionally arranged, the operation convenience and the safety are improved, and the manual labor intensity is also reduced.
The submarine cable maintenance method is convenient to dispatch and simple to operate, and can effectively improve the maintenance operation efficiency; the equipment required in the whole operation process is simple, the assembly, the disassembly and the transportation are convenient, the rush repair time can be effectively shortened, and the construction cost is reduced; the high-altitude back-twist operation is not needed, and the operation safety is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A submarine cable maintenance method is characterized in that: the method comprises the following steps:
s1) operating a work ship to a maintenance area, and launching a diver to determine the actual damaged position of a submarine cable;
s2) cutting off the submarine cable from an actual damaged position, and marking two sections of submarine cables formed after cutting off as a first submarine cable and a second submarine cable respectively;
s3) salvaging the first submarine cable to a working ship for fault verification to determine a fault section, cutting off the fault section on the first submarine cable, and hoisting the first submarine cable back to the sea after binding a sheath at the tail end of the first submarine cable;
s4) salvaging the second submarine cable to a working ship for fault verification to determine a fault section, cutting off the fault section on the second submarine cable, and leading out a section of spare cable from the bottom of a winch arranged on a deck of the working ship, so that the leading-out end of the spare cable is connected with the tail end of the second submarine cable with the fault section cut off through a first connector;
s5) hoisting the second submarine cable back to the sea, launching the second submarine cable by a diver, then drawing the spare cable to lay towards the direction of the first submarine cable until the second submarine cable reaches the position of the first submarine cable, and calculating the length of the laid spare cable;
s6) salvaging the first submarine cable to a working ship, cutting off the spare cable from the winch, wherein the length of the spare cable obtained after cutting off is equal to the length of the spare cable calculated in the step S5), and connecting the spare cable obtained after cutting off with the first submarine cable through a second connector.
2. A submarine cable repair method according to claim 1, wherein: the method for determining the damage position of the submarine cable by the diver launching in the step S1) comprises the following steps: the diver dives to the seabed to remove the sludge covered on the submarine cable in the area until the damaged position of the submarine cable is exposed, and then spray flushing treatment is carried out on two sides of the damaged position to remove the covering sundries on the submarine cable on the two sides of the damaged position.
3. A submarine cable repair method according to claim 2, wherein: the sludge covered on the submarine cable is removed by manual mud blowing or mechanical mud blowing.
4. A submarine cable repair method according to claim 1, wherein: the method for shearing the submarine cable from the damaged position in the step S2) comprises the following steps: the cutting device is fed into the sea floor by a crane and the submarine cable is cut from the damaged position by the cutting device.
5. A submarine cable repair method according to claim 1, wherein: before the first submarine cable is hoisted back to the sea in the step S3), a buoy is bound at the tail end of the first submarine cable.
6. A submarine cable repair method according to claim 1, wherein: in the step S3), after the fault section on the first submarine cable is cut off, the tail end of the first submarine cable needs to be subjected to waterproof treatment, and then a sheath is bound to the tail end of the first submarine cable.
7. A submarine cable repair method according to claim 1, wherein: all go on in the submarine cable service kit when carrying out fault verification to first submarine cable and second submarine cable, submarine cable service kit sets up on the work ship.
8. A submarine cable repair method according to claim 1, wherein: the wind speed of the sea area where the working ship is located is not more than 5 grades, and the surge is not more than 0.5m.
9. A submarine cable repair method according to claim 1, wherein: the winch comprises a lower base and an upper base, wherein the lower base is fixed on a deck of the working ship.
10. A submarine cable repair method according to claim 1, wherein: and a back-twist pay-off rack is arranged on the winch, and the standby cable is released and led out from the back-twist pay-off rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123488.8A CN115395442A (en) | 2022-09-15 | 2022-09-15 | Submarine cable maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123488.8A CN115395442A (en) | 2022-09-15 | 2022-09-15 | Submarine cable maintenance method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115395442A true CN115395442A (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211123488.8A Pending CN115395442A (en) | 2022-09-15 | 2022-09-15 | Submarine cable maintenance method |
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|---|---|
| CN (1) | CN115395442A (en) |
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2022
- 2022-09-15 CN CN202211123488.8A patent/CN115395442A/en active Pending
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