CN202348918U - Connection structure for floating production storage and offloading (FPSO) mooring leg counter weight chain - Google Patents
Connection structure for floating production storage and offloading (FPSO) mooring leg counter weight chain Download PDFInfo
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- CN202348918U CN202348918U CN2011204069648U CN201120406964U CN202348918U CN 202348918 U CN202348918 U CN 202348918U CN 2011204069648 U CN2011204069648 U CN 2011204069648U CN 201120406964 U CN201120406964 U CN 201120406964U CN 202348918 U CN202348918 U CN 202348918U
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- locking nut
- bolt
- fpso
- connection structure
- counter weight
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Abstract
The utility model discloses a connection structure for a floating production storage and offloading (FPSO) mooring leg counter weight chain. The connection structure comprises a D type shackle, wherein the opening end of the D type shackle is provided with a connection bolt; a locking nut is arranged on the connection bolt; a central hole is formed in the tail part of a bolt bar of the connection bolt; and after the locking nut is locked, a limit flattening structure of the locking nut is formed on the tail part of the bolt bar. According to the connection structure, the central hole is formed in the tail part of the bolt bar, and after the bolt bar is connected underwater, the tail part is flattened by using a tool to form the limit flattening structure of the locking nut; and compared with a safety positioning pin, the corrosion-resistant capacity of the limit flattening structure is improved greatly, a nut which is corroded by seawater also can be prevented from being dropping effectively, so that the dropping of the counter weight chain is prevented, and the safety of FPSO mooring is ensured. In addition, the connection structure is more convenient than a safety pin during underwater construction, and fully meets special requirements of the FPSO mooring leg counter weight chain which is used, maintained and replaced under marine environment.
Description
Technical field
The utility model relates to a kind of connecting structure, particularly relates to a kind of connecting structure of FPSO mooring leg counterweight chain.
Background technique
See also Fig. 1～Fig. 3; At present; The connecting structure of FPSO (the outer conveying device of Floating Production oil storage) mooring leg counterweight chain is: utilize safe locating stud 4 limited lock jack panels 3 to come off, safe locating stud 4 uses under the briny environment condition, and it is not too convenient to install at first under water; Secondly safe locating stud is come off by seawater corrosion easily, and the screw thread of locking nut 3 can lose locking function because of seawater corrosion too in addition.Receive under ocean current and the FPSO motion effects in the seabed; About being easy to generate, front and back and side-to-side movement; Thereby locking nut is produced torsion make its rotation; After the screw thread of locking nut 3 is lost locking function by seawater corrosion, after the location protection that loses safe locating stud, come off gradually, and then can cause connecting bolt 2 and counterweight chain together to come off from D type shackle 1.Mooring safety to FPSO causes very big hidden danger.
The model utility content
The utility model provides a kind of connecting structure of easy for installation, anti-corrosion capacity is strong, mooring safety is stronger FPSO mooring leg counterweight chain for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of connecting structure of FPSO mooring leg counterweight chain; Comprise the shackle of D type; The opening end of said D type shackle is provided with connecting bolt, and said connecting bolt is provided with locking nut, and said connecting bolt is processed with center hole at the bolt shank afterbody; After said locking nut locking, said bolt shank afterbody is formed with the spacing flaser texture of said locking nut.
The hole depth of said center hole is 20～110mm, and the aperture is 50%～80% of a said bolt shank diameter.
The length that said bolt shank stretches out said locking nut is than the big 1～5mm of the degree of depth of said center hole.
Advantage and the good effect that the utlity model has are: through being employed in screw rod tail machining center hole; Connect good back under water and this afterbody is flattened the spacing flaser texture that forms locking nut with instrument; This spacing flaser texture not only anti-corrosion capacity has been compared very big lifting with the safety locating stud; Can also effectively stop equally to be come off, and then stop coming off of counterweight chain, guarantee FPSO mooring safety by the nut of seawater corrosion.And this structure is also convenient than safety pin when carrying out underwater construction, is particularly suitable for the specific (special) requirements that operation and maintenance is changed under the ocean environment condition of FPSO mooring leg counterweight chain.
Description of drawings
Fig. 1 is the plan view of existing technology;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the right elevation of Fig. 1;
Fig. 4 is the plan view before the spacing flaser texture for the utility model forms;
Fig. 5 is the right elevation of Fig. 4;
Fig. 6 is the plan view behind the utility model the forms spacing flaser texture;
Fig. 7 is the right elevation of Fig. 6.
Embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 4～Fig. 7; A kind of connecting structure of FPSO mooring leg counterweight chain comprises D type shackle 1, and the opening end of said D type shackle is provided with connecting bolt 2; Said connecting bolt 2 is provided with locking nut 3; Said connecting bolt 2 is processed with center hole 5 at the bolt shank afterbody, and after said locking nut 3 lockings, said bolt shank afterbody forms the spacing flaser texture 6 of said locking nut.Tighten locking nut during underwater operation earlier, utilize Hydraulic power tools that the bearing pin end is flattened again, play position-limiting action, thereby prevent that effectively locking nut from coming off, and then effectively stoped coming off of counterweight chain, guaranteed the mooring safety of FPSO locking nut.
The hole depth of said center hole 5 is 20～110mm, and the aperture is 50%～80% of a said bolt shank diameter.Can guarantee the thickness and the intensity of above-mentioned spacing flaser texture 6, thereby improve the anti-seawater corrosion ability, prolong its spacing operating life.
The length that said bolt shank stretches out said locking nut 3 is than the big 1～5mm of the degree of depth of said center hole 5.Can guarantee that spacing flaser texture 6 can not destroy combining of locking nut 3 and bolt screw thread.
The utility model improves to the shackle attachment bolt of existing counterweight chain; Afterbody machining center hole at bolt shank; The counterweight chain connects with fixing bolt under water then, installs locking nut, utilizes the dedicated hydraulic instrument that the afterbody of bolt shank is flattened the spacing flaser texture of formation again; This spacing flaser texture not only anti-corrosion capacity has had very big lifting; Can also effectively stop equally to be come off, and then effectively stop coming off of counterweight chain, improve the Security of counterweight chain mooring by the locking nut of seawater corrosion.
Although combine accompanying drawing that the preferred embodiment of the utility model is described above; But the utility model is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Not breaking away under the scope situation that the utility model aim and claim protect, can also make a lot of forms, these all belong within the protection domain of the utility model.
Claims (3)
1. the connecting structure of a FPSO mooring leg counterweight chain; Comprise the shackle of D type, the opening end of said D type shackle is provided with connecting bolt, and said connecting bolt is provided with locking nut; It is characterized in that; Said connecting bolt is processed with center hole at the bolt shank afterbody, and after said locking nut locking, said bolt shank afterbody forms the spacing flaser texture of said locking nut.
2. the connecting structure of FPSO mooring leg counterweight chain according to claim 1 is characterized in that the hole depth of said center hole is 20～110mm, and the aperture is 50%～80% of a said bolt shank diameter.
3. the connecting structure of FPSO mooring leg counterweight chain according to claim 1 and 2 is characterized in that, the length that said bolt shank stretches out said locking nut is than the big 1～5mm of the degree of depth of said center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204069648U CN202348918U (en) | 2011-10-21 | 2011-10-21 | Connection structure for floating production storage and offloading (FPSO) mooring leg counter weight chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204069648U CN202348918U (en) | 2011-10-21 | 2011-10-21 | Connection structure for floating production storage and offloading (FPSO) mooring leg counter weight chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348918U true CN202348918U (en) | 2012-07-25 |
Family
ID=46537925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204069648U Expired - Lifetime CN202348918U (en) | 2011-10-21 | 2011-10-21 | Connection structure for floating production storage and offloading (FPSO) mooring leg counter weight chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348918U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815369A (en) * | 2012-08-09 | 2012-12-12 | 中国海洋石油总公司 | Maintenance method of counter weight of anchor chain of single point mooring system |
| CN106286709A (en) * | 2016-10-07 | 2017-01-04 | 青岛征和工业股份有限公司 | A kind of bearing pin and high output diesel engine chain |
| CN108792925A (en) * | 2018-07-19 | 2018-11-13 | 中国五冶集团有限公司 | A kind of neat bundled steel bar truss floor support plate suspender |
-
2011
- 2011-10-21 CN CN2011204069648U patent/CN202348918U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815369A (en) * | 2012-08-09 | 2012-12-12 | 中国海洋石油总公司 | Maintenance method of counter weight of anchor chain of single point mooring system |
| CN106286709A (en) * | 2016-10-07 | 2017-01-04 | 青岛征和工业股份有限公司 | A kind of bearing pin and high output diesel engine chain |
| CN108792925A (en) * | 2018-07-19 | 2018-11-13 | 中国五冶集团有限公司 | A kind of neat bundled steel bar truss floor support plate suspender |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170103 Address after: 100010 Beijing city Dongcheng District Dongzhimen Street No. 6 Patentee after: CNOOC Energy Technology Co., Ltd. Patentee after: Western South China Sea oil field service (Shenzhen) Co., Ltd. Patentee after: CNOOC Energy Development Co.,Ltd recovers the oil and serves ancillary firm Address before: 100010 Beijing City, Dongcheng District Chaoyangmen No. 25 North Street CNOOC building Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Energy Technology Co., Ltd. Patentee before: Western South China Sea oil field service (Shenzhen) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |