CN109421896B - Subsea valve box, sealing cover plate thereof, and maintenance method of subsea valve box - Google Patents
Subsea valve box, sealing cover plate thereof, and maintenance method of subsea valve box Download PDFInfo
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- CN109421896B CN109421896B CN201710786246.XA CN201710786246A CN109421896B CN 109421896 B CN109421896 B CN 109421896B CN 201710786246 A CN201710786246 A CN 201710786246A CN 109421896 B CN109421896 B CN 109421896B
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- valve box
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- sealing cover
- subsea valve
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- 238000007789 sealing Methods 0.000 title claims abstract description 68
- 238000012423 maintenance Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000013535 sea water Substances 0.000 claims abstract description 33
- 230000005484 gravity Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000004078 waterproofing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 4
- 230000001012 protector Effects 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- WJCNZQLZVWNLKY-UHFFFAOYSA-N thiabendazole Chemical compound S1C=NC(C=2NC3=CC=CC=C3N=2)=C1 WJCNZQLZVWNLKY-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
- B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
- Valve Housings (AREA)
Abstract
The invention provides a subsea valve box, a sealing cover plate thereof and a maintenance method of the subsea valve box. The subsea valve box comprises: box, bedplate and backplate. The box body is arranged on the inner side of the bottom of the ship body and connected with the ship body outer plate, and an opening is formed in the box body facing the outer side of the ship body; the seat board is fixedly arranged on the outer surface of the periphery of the opening; the guard plate covers on the surface of bedplate to through fastener with the bedplate can dismantle the connection. The protective plate is arranged on the submarine valve box, so that the seat plate is effectively protected, and the influence on the sealing effect caused by the corrosion of the seat plate by seawater is avoided, the seat plate can be used for a long time in a complex submarine environment, and the additional values of ships and ocean platforms are improved.
Description
Technical Field
The invention relates to the field of ship and ocean engineering construction, in particular to a ship and ocean platform submarine valve box, a sealing cover plate and a maintenance method thereof.
Background
The subsea valve box of a ship and an ocean platform is an important part for extracting seawater from the sea, and is a life line for maintaining a balanced state between the ship and the ocean platform. Therefore, as long as the ship with the ballast water system and the ocean platform can not be separated from the submarine valve box, the interior of the ship comprises a seawater main pipe, a vent pipe, a blow-washing pipe, a grid unit, an aluminum electrode, a copper electrode, a sacrificial anode, a cooling water return pipe and the like. In order to reduce the harm of marine life to ships and ocean platforms, the ionization marine life prevention technology is commonly adopted. That is to say, the current is generated by the positive and negative electrodes to electrolyze the seawater, so that on one hand, part of marine life can be killed by the current, on the other hand, the chloride in the electrolyzed seawater can generate chlorine, and the chlorine reacts with the aquatic life to generate hypochlorous acid, thereby playing a role in killing the marine life.
The marine growth prevention electrode generally adopts copper-aluminum electrode grade, and the service life of the electrode basically does not exceed three years, so the electrode needs to be replaced. In addition to the conventional dock repair replacement, it is also necessary to perform the replacement at sea. The pipelines are soaked in seawater all the year round, and are still corroded by the seawater, so that impurities such as fishing nets and seaweeds are accumulated, and maintenance and cleaning are also needed. Subsea grids have suffered from severe corrosion over the years and require repair and replacement. This is usually done after the door is closed, but the subsea door is poorly sealed due to the varying degree of corrosion of the subsea grid.
Disclosure of Invention
In order to solve the technical problems, the invention provides a subsea valve box, a sealing cover plate thereof and a subsea valve box maintenance method, so as to solve the problems of poor sealing effect, inconvenience in maintenance and the like of a subsea door in the prior art.
In view of the above technical problem, the present invention provides a subsea valve box, which includes: box, bedplate and backplate. The box body is arranged on the inner side of the bottom of the ship body and connected with the ship body outer plate, and an opening is formed in the box body facing the outer side of the ship body; the seat board is fixedly arranged on the outer surface of the periphery of the opening; the guard plate covers on the surface of bedplate to through fastener with the bedplate can dismantle the connection.
In a preferred embodiment, the opening is provided with a sea chest, and the sea chest is provided with a grating unit so that seawater can enter the interior of the valve box through the grating.
In a preferable scheme, a sealing gasket is arranged between the seat plate and the guard plate.
The invention also provides a sealing cover plate of the subsea valve box, which comprises: the waterproof cover plate comprises a steel cover plate body and a waterproof sheet attached to the outer surface of the cover plate body, wherein the waterproof sheet is made of a light buoyancy material, and the buoyancy of the waterproof sheet in seawater is larger than the gravity of the waterproof sheet.
In a preferable mode, a handle is arranged on the outer surface of the waterproof sheet.
In a preferable scheme, the waterproof sheet is made of foam, and buoyancy provided by the waterproof sheet in seawater is approximately equal to the gravity of the sealing cover plate.
In a preferable scheme, a reinforcing rib is arranged on the outer surface of the cover plate body facing the waterproof sheet, and the waterproof sheet covers the reinforcing rib.
In a preferable scheme, the sealing cover plate is provided with a plurality of air holes and a cock capable of sealing the air holes, and the air holes penetrate through the waterproof sheet and the cover plate body to communicate the inner space of the valve box with the outside.
The invention also proposes a subsea valve box comprising: the box body, the seat plate and the sealing cover plate; the box body is arranged on the inner side of the bottom of the ship body and connected with the ship body outer plate, and an opening is formed in the box body facing the outer side of the ship body; the seat plate is fixedly arranged on the outer surface of the periphery of the opening; the sealing cover plate is detachably mounted on the seat plate.
The invention also provides a maintenance method of the subsea valve box, which comprises the following steps: presetting a sealing cover plate, wherein the sealing cover plate comprises: the waterproof structure comprises a steel cover plate body and a waterproof sheet attached to the outer surface of the cover plate body, wherein the waterproof sheet is made of a light buoyancy material, and the buoyancy of the waterproof sheet in seawater is larger than the gravity of the waterproof sheet; the protection plate is removed aiming at the subsea valve box needing to be maintained, and the sealing cover plate is fixedly arranged on the seat plate to close the opening of the valve box; repairing or replacing the electrodes and pipelines in the subsea valve box; and after the maintenance or replacement is finished, the sealing cover plate is removed, and the guard plate which is removed before is installed on the seat plate again.
Compared with the prior art, the invention has the following beneficial effects: the protective plate is arranged on the submarine valve box, so that the seat plate is effectively protected, and the influence on the sealing effect caused by the corrosion of the seat plate by seawater is avoided, the seat plate can be used for a long time in a complex submarine environment, and the additional values of ships and ocean platforms are improved.
Drawings
FIG. 1 is a schematic diagram of the bioelectrode installation structure of the subsea valve box according to the present embodiment.
Fig. 2 is a schematic structural diagram of the opening position of the subsea valve box in the present embodiment.
Fig. 3 is a view of the structure in the AA direction in fig. 2.
Fig. 4 is a schematic view of a partial cross-sectional structure in the BB direction in fig. 3.
Fig. 5 is a schematic structural view of the sealing cover plate of the present embodiment installed at the opening position of the valve box.
Fig. 6 is a structural view in the CC direction in fig. 5.
Fig. 7 is a flow chart of the steps of the method of servicing a subsea valve box of the present invention.
The reference numerals are explained below: 11. a hull outer plate; 2. a subsea valve box; 21. a box body; 201. a subsea door; 2011. a grill unit; 22. a seat plate; 23. a guard plate; 24. a gasket; 25. sealing the cover plate; 251. a cover plate body; 2511. reinforcing ribs; 252. a waterproof sheet; 253. a cock; 26. a gasket; 27. a full-thread screw; 202. a bio-proof electrode.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 6, the subsea valve box 2 of the present embodiment includes: a box 21, a seat plate 22 and a guard plate 23.
The tank 21 is provided inside the hull bottom and connected to the hull outer panel 11, and the tank 21 has an opening facing the hull outer side. The seat plate 22 is fixedly mounted on the outer surface of the outer periphery of the opening. The protector plate 23 covers the outer surface of the seat plate 22 and is detachably attached to the seat plate 22 by a fastener.
When the protector plate 23 is connected to the seat plate 22, the subsea valve box 2 is normally used as a seawater intake device.
Specifically, the tank 21 is surrounded by a plurality of outer plates, and the outer plate 211 facing the hull outer side constitutes a part of the hull plate 11. The opening of the tank 21 is provided in the outer panel 211 thereof facing the outside of the hull. Further, a sea chest 201 is installed at the opening, and a grating unit 2011 is provided on the sea chest 201 to allow seawater to enter the interior of the valve box through the grating.
The seat plate 22 is fixedly attached to the outer plate 211, and its surface facing the outside of the hull is covered with a fender 23 to protect the surface from seawater. Further, a sealing gasket 24 is provided between the seat plate 22 and the protector plate 23 for the purpose of sealing the seat plate 22.
The subsea valve box 2 of the present embodiment further comprises: a sealing cover plate 25 detachably mountable to the seat plate 22. When the subsea valve box 2 needs to be repaired, the sealing cover 25 is used to close the opening of the subsea valve box 2, and at this time, the shield 23 of the subsea valve box 2 is removed from the seat plate 22 so that the sealing cover 25 is detachably mounted on the seat plate 22.
Specifically, the sealing cover 25 includes: a steel cover plate body 251 and a waterproof sheet 252 attached to the outer surface of the cover plate body 251, wherein the waterproof sheet 252 may be attached to the cover plate body 251 by bonding or spraying. The waterproofing sheet 252 is a lightweight buoyant material, and the buoyancy provided by the waterproofing sheet 252 in seawater is substantially the weight of the sealing cover plate 25 itself. In this embodiment, the waterproof sheet 252 is made of foam or polyurethane organic polymer. Further, the outer surface of the cover plate body 251 facing the waterproof sheet 252 is provided with a reinforcing rib 2511, the waterproof sheet 252 covers the reinforcing rib 2511, and the reinforcing rib 2511 may be one or multiple ribs arranged in a crossed manner, so that the sealing cover plate 25 bears stronger pressure, and the sealing cover plate is suitable for ocean platforms and large ships with larger draft.
Preferably, a handle is provided on the outer surface of the waterproof sheet 252, which facilitates the operation.
In other embodiments, the waterproof sheet 252 may have a buoyancy greater than its own weight in seawater to make the sealing cover 25 portable in seawater.
The sealing cover plate 25 in this embodiment is further provided with a plurality of ventilation holes which communicate the inner space of the valve box with the outside through the waterproof sheet 252 and the cover plate body 251, and a cock 253 capable of sealing the ventilation holes.
Referring to fig. 7, the present invention also provides a method for repairing a subsea valve box, which is performed after the subsea valve box is sealed to prevent seawater from entering the interior of a hull, the method comprising:
step S10, presetting a sealing cover plate, where the sealing cover plate includes: the water-proof plate is made of light buoyancy materials, and the buoyancy of the water-proof plate in seawater is larger than the gravity of the water-proof plate.
And step S20, removing the protective plate for the submarine valve box needing to be maintained, and fixedly installing the sealing cover plate on the seat plate to close the opening of the valve box.
And step S30, repairing or replacing the electrodes and the pipelines in the subsea valve box.
And step S40, after the maintenance or replacement is finished, the sealing cover plate is removed, and the guard plate which is removed before is installed on the seat plate again.
Next, referring to fig. 1 to 7, a method for repairing a subsea valve box will be described by taking a semi-submersible drilling platform as an example.
In step S10, the semi-submersible drilling platform in this embodiment is provided with eleven subsea valve boxes 2, six for port and five for starboard; wherein, five seabed valve boxes 2 distributed on the port side are respectively and symmetrically arranged with the five seabed valve boxes 2 distributed on the starboard side. The line type of the hull plates 11 at the positions of every two symmetrical subsea valve boxes 2 is a single-curvature curved surface, so that the subsea doors 201 of the two subsea valve boxes 2 are universal. Thus, the present embodiment is provided with eleven shield plates 23 and six sealing cover plates 25.
Eleven shields 23 are already connected to the seat plate 22 at the time of construction, that is, each shield 23 and a corresponding washer 26 are fastened to the seat plate 22 with a full-thread screw 27 and are subjected to machining treatment and effective corrosion prevention treatment together with the hull, ensuring the accuracy of the connection surface to reduce the maintenance cost at a later stage. Meanwhile, since the six sealing cover plates 25 are different in size and weight, the six sealing cover plates 25 are numbered to correspond to eleven shield plates 23 for easier recognition. And the weights of the six sealing cover plates 25 are obtained by calculation, and after the waterproof sheet 252 is attached to the outer surface of the cover plate body 251, the buoyancy provided by the waterproof sheet 252 in the sea water is substantially equal to the gravity of the sealing cover plates 25 themselves, so that the diver can easily carry the sealing cover plates 25 in the sea water.
In other embodiments, the sheet 252 may be buoyant in seawater than its own weight.
Before step S20 is performed, the usage of the bio-guard electrode 202, the pipeline (not shown in the figure), and the subsea door 201 of each subsea valve box 2 is diagnosed in advance to determine the position of the subsea valve box 2 to be repaired and whether the subsea valve box 2 to be repaired is partially or completely replaced. Then, the subsea valve boxes 2 to be repaired are sequentially repaired one by one.
In step S20, the diver first dives the first subsea valve box 2 to be repaired, carrying the sealing cover 25, the new sealing gasket 24, the new gasket 26 and the new full thread screw 27 corresponding to the subsea valve box 2, in the order of repair. The diver's easy carrying is achieved because the gravity of the sealing cover plate 25 in the sea water approaches its buoyancy. Then, the diver removes the old full-thread screws 27 on the subsea valve box 2 by means of tools and removes the old gaskets 26, the shield 23 and the old gaskets 24; wherein, because the old full-thread screw 27, the old gasket 26 and the old sealing gasket 24 are eroded by seawater, they are not reused any more to ensure the tightness of the installation, but the fender 23 is retained and brought back to the ship for subsequent reuse. Finally, a new gasket 24, a new sealing cover 25 are mounted in turn on the seat plate 22 and a new gasket 26 is fitted and secured by a new full-thread screw 27, after which the diver returns the board 23 to the ship.
In step S30, replacement or repair is performed in the cabin according to the result of the preliminary diagnosis; specifically, after the new bio-prevention electrode 202 is installed, its sealing properties should be checked to make it meet the sealing requirements; enters the interior of the subsea valve box 2 through the seawater main pipeline to repair other pipelines and/or subsea doors 201 in the subsea valve box 2 until all the repair and replacement operations are completed.
It should be noted that, because the sea chest 2 contains a small amount of seawater, the seawater can be partially or completely pumped out during the disassembly process for specific replacement and maintenance.
In the process of implementing step S40, the diver carries the shield plate 23 to dive to the position of the subsea valve box 2 again, and first, the cock 253 on the sealing cover plate 25 is pulled out from the vent hole to balance the pressure inside and outside the subsea valve box 2; then, the seal cover plate 25 is removed, and the protector plate 23 is mounted in place to protect the seat plate 22. Finally, the detached sealing cover 25 is brought back to the hull.
At this point, the maintenance work of the first subsea valve box 2 is completed.
And repeating the steps S20 to S40, and maintaining the subsea valve box 2 in other positions needing to be maintained until all the subsea valve boxes 2 needing to be maintained are maintained.
The protective plate is arranged on the submarine valve box, so that the seat plate is effectively protected, and the influence on the sealing effect caused by the corrosion of the seat plate by seawater is avoided, the seat plate can be used for a long time in a complex submarine environment, and the additional values of ships and ocean platforms are improved.
Furthermore, waterproof sheets are attached to the sealing cover plate body, so that the buoyancy of the sealing cover plate is close to the gravity of the sealing cover plate, the burden of a diver is relieved, the operation is easier, the underwater time of the diver is reduced, and the risk of the diver in an underwater complex environment is effectively reduced.
While the present invention has been described with reference to the above exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A subsea valve box, comprising:
the tank body is arranged on the inner side of the bottom of the ship body and connected with the ship body outer plate, and the tank body is provided with an opening facing the outer side of the ship body;
the seat plate is fixedly arranged on the outer surface of the periphery of the opening;
the protection plate covers on the outer surface of the seat plate and is detachably connected with the seat plate through a fastener.
2. A subsea valve box according to claim 1, characterized in that a subsea door is mounted at said opening, said subsea door having a grating unit thereon to allow seawater to enter the interior of the valve box through the grating.
3. The subsea valve box of claim 1, wherein a gasket is disposed between the seat plate and the shield plate.
4. A sealing cover plate for a subsea valve box, comprising: the waterproof cover plate comprises a steel cover plate body and a waterproof sheet attached to the outer surface of the cover plate body, wherein the waterproof sheet is made of a light buoyancy material, and the buoyancy of the waterproof sheet in seawater is larger than the gravity of the waterproof sheet.
5. The sealing cover plate for a subsea valve box according to claim 4, wherein said waterproof sheet has a handle provided on an outer surface thereof.
6. A sealing cover plate for a subsea valve box according to claim 4, wherein said water-resistant sheet material is a foam material, and wherein said water-resistant sheet material is capable of providing a buoyancy in seawater substantially equal to the weight of said sealing cover plate itself.
7. The sealing cover plate for a subsea valve box according to claim 4, wherein an outer surface of said cover plate body facing said waterproofing sheet is provided with reinforcing ribs, and said waterproofing sheet covers said reinforcing ribs.
8. The bottom deck of claim 4, wherein a plurality of vent holes are formed in the sealing cover plate, and a cock is provided to seal the vent holes, the vent holes penetrating the waterproof sheet and the cover plate body to communicate an inner space of the valve housing with the outside.
9. A subsea valve box, comprising: a box, a seat plate and a sealing cover plate according to any one of claims 4 to 8; the box body is arranged on the inner side of the bottom of the ship body and connected with the ship body outer plate, and an opening is formed in the box body facing the outer side of the ship body; the seat plate is fixedly arranged on the outer surface of the periphery of the opening; the sealing cover plate is detachably mounted on the seat plate.
10. A method of servicing a subsea valve box according to any of claims 1-3, comprising the steps of:
presetting a sealing cover plate, wherein the sealing cover plate comprises: the waterproof structure comprises a steel cover plate body and a waterproof sheet attached to the outer surface of the cover plate body, wherein the waterproof sheet is made of a light buoyancy material, and the buoyancy of the waterproof sheet in seawater is larger than the gravity of the waterproof sheet;
the protection plate is removed aiming at the subsea valve box needing to be maintained, and the sealing cover plate is fixedly arranged on the seat plate to close the opening of the valve box;
repairing or replacing the electrodes and pipelines in the subsea valve box;
and after the maintenance or replacement is finished, the sealing cover plate is removed, and the guard plate which is removed before is installed on the seat plate again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710786246.XA CN109421896B (en) | 2017-09-04 | 2017-09-04 | Subsea valve box, sealing cover plate thereof, and maintenance method of subsea valve box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710786246.XA CN109421896B (en) | 2017-09-04 | 2017-09-04 | Subsea valve box, sealing cover plate thereof, and maintenance method of subsea valve box |
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| Publication Number | Publication Date |
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| CN109421896A CN109421896A (en) | 2019-03-05 |
| CN109421896B true CN109421896B (en) | 2020-12-22 |
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| CN201710786246.XA Active CN109421896B (en) | 2017-09-04 | 2017-09-04 | Subsea valve box, sealing cover plate thereof, and maintenance method of subsea valve box |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109915640B (en) * | 2019-04-30 | 2020-12-22 | 广船国际有限公司 | Valve box and ship comprising same |
| CN113830269A (en) * | 2021-10-18 | 2021-12-24 | 中国舰船研究设计中心 | Flange structure for butt joint of pressure-resistant cabin sections of underwater special equipment and mounting method of flange structure |
| CN114394204A (en) * | 2022-01-10 | 2022-04-26 | 大连船舶重工集团有限公司 | Floating production oil storage and discharge platform subsea valve box sealing device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07215272A (en) * | 1994-02-04 | 1995-08-15 | Yamaha Motor Co Ltd | Live well structure of small size vessel |
| JPH10203470A (en) * | 1997-01-27 | 1998-08-04 | Mitsubishi Heavy Ind Ltd | Water jet propulsion high speed ship |
| KR20050086096A (en) * | 2004-02-25 | 2005-08-30 | 주식회사 두양 | Board of block sea water for a vessel sea chest |
| CN201245229Y (en) * | 2008-08-07 | 2009-05-27 | 江苏省镇江船厂有限责任公司 | Detachable partition board type shipping air-separating seawater tank |
| CN201553281U (en) * | 2009-10-29 | 2010-08-18 | 上海京荣船舶设计有限公司 | Device capable of preventing ship seawater box from icy blockage |
| CN103803035B (en) * | 2014-02-08 | 2016-09-07 | 天津港轮驳有限公司 | The alternative removed in tugboat sea water service system marine growth depressed place |
| CN204659988U (en) * | 2015-05-25 | 2015-09-23 | 烟台中集来福士海洋工程有限公司 | Marine engineering equipment and suction box sealing arrangement thereof |
| CN205737976U (en) * | 2016-03-22 | 2016-11-30 | 上海船舶研究设计院 | Sea water supply system peculiar to vessel |
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