GB2138088A - Submarine cable joint housing - Google Patents
Submarine cable joint housing Download PDFInfo
- Publication number
- GB2138088A GB2138088A GB08310159A GB8310159A GB2138088A GB 2138088 A GB2138088 A GB 2138088A GB 08310159 A GB08310159 A GB 08310159A GB 8310159 A GB8310159 A GB 8310159A GB 2138088 A GB2138088 A GB 2138088A
- Authority
- GB
- United Kingdom
- Prior art keywords
- housing
- sections
- joint
- cable
- epoxy resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003822 epoxy resin Substances 0.000 claims abstract description 26
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000271 Kevlar® Polymers 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 239000004761 kevlar Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 description 11
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
-
- 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
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/12—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers
- H02G15/14—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers specially adapted for submarine cables
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Cable Accessories (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
An armoured submarine cable joint comprising a tubular housing 10 with internally tapered end portions 10a closely fitting the outer sheath of the submarine cable 5 containing hydraulic hoses 1, 2 wherein the armouring wires 4 or tapes adjacent each cable end are splayed and deformed 4a within each tapered end portion, characterised in that the housing is fabricated from glass filament wound epoxy resin sections adhesively bonded together and potted with a filled epoxy resin system. <IMAGE>
Description
SPECIFICATION
Submarine cable joint housing
This invention relates to a housing assembly
for submarine cable joints.
The term "cable" is used hereinafter to
include electrical cables, fibre optic cables,
hose bundles or any combinations thereof. For example a single cable may include hoses
carrying hydraulic fluids, insulated metallic
conductors for electric power requirements,
and metallic conductors or optical fibres for
communicating purposes. The cable also in
cludes external armouring wires or tapes.
Such cables, and particularly joints in such
cables, are required to withstand considerable
longitudinal stresses when being laid in open
sea conditions, or being lowered from oil rigs,
whilst whist at the same time they must resist very
high compressive forces when in situ at great
depths.
Traditionally housing for submarine cable
joints have been fabricated from machined
steel tubes which incorporate (if required)
steel armour anchorages, adjustable load col
lars, threaded end caps, and are filled with
filling compound after the joint has been
made and the housing secured in place. The tensile load on the joint is transferred from the
armouring via the load collars to the steel
casing. The filling compound serves to pre
vent any moisture entering the steel casing
reaching the cable joints within the housing
assembly. Such steel housings are expensive
and heavy to handle.
According to the present invention there is
provided a submarine cable joint housing
comprising at least two housing end sections
each formed as a hollow tube of filament
wound epoxy resin composite, each end sec
tion being formed with one internally tapered
end portion with adjacent housing sections
jointed together by bonded joints between
non-tapering portions of the sections, at least
one housing section being provided with a
filler hole through which the completed hous
ing is filled with a loaded epoxy resin filler
compound.
The invention also provides a method of
jointing an armoured submarine cable includ
ing the steps of spreading and deforming the
ends of the armouring wires or tapes adjacent
each cable end, enclosing the cable joint
within a tubular filament wound glass epoxy
resin housing having internally tapered end
portions closely fitting the external covering of
the cable, and filling the housing with a
loaded epoxy resin compound.
An embodiment of the invention will now
be described with reference to the accom
panying drawing which depicts a longitudinal
section through one half of a submarine cable
joint.
The cable to be joined is illustrated as a hydraulic hose bundle containing hoses 1, 2 encased in polyethylene belting which is in turn wrapped with steel armour wires 4.
Finally the armouring is covered by an outer polyethylene sheath 5.
Each cable end is threaded through a respective half of a filament wound glass epoxy resin housing section 10. The housing section is tubular in cross section, the main portion being of greater diameter internally then the external diameter of the cable outer sheath 5.
Each section has an internally tapered end portion 1 0a which is a close fit over the cable outer sheath 5.
To effect a cable joint each cable end is first threaded through a heat shrinkable sleeve 11, a synthetic resin bonded fibre (SRBF) annular plug 1 lea, an annular "U''-ring seal 1 lb. The housing section 10 is then slipped over the cable end. The outer sheath 5 is cut back to expose a length of armouring 4. The armour wires are splayed out and the ends 4a of the wires are randomly deformed, e.g. by kinking or joggling. Alternatively the wire ends may be left straight or just shot-blasted. The inner belting 3 is also cut back to a lesser extent to expose the individual hose ends 1,2. Each hose end is provided with a threaded coupling 12, 13 respectively. A metal stabilising sleeve 14 is forced over the inner belting 3 and a circular clamp 15 is attached thereto by screws 16.Compression of an annular seal ring 17 is effected between the sleeve and clamp flanges when the screws 16 are tightened. Lastly a heat shrink boot 18 may be placed over the end of the inner belting 3 and the clamp 15. The cable end is now ready for jointing to another similarly prepared cable end.
The two cable ends to be joined are brought together and the corresponding hose couplings 12. 13 screwed together. The respective housing sections 10 are then butted together after an internal joining sleeve 19 has been inserted into one housing section.
The housing sections are secured to each other and to the joining sleeve by adhesive bonded lap joint 10c, assisted by the butt joint 1 Ob. The SRBF plug 1 1 a is pushed into the machined recess in the housing end section, thereby compressing the "U"-ring seal 1 1 b. The heat shrinkable sleeve 11 is then moved into position over the plug and heated to form a tight shrink-fitted seal over the end of the housing and port of the cable. Alternatively the whole joint housing may be encased in a heat shrink covering.
When all of the above operations have been completed the interior of the housing is potted using a filled epoxy resin system via filler holes 1 Od in the housing sections 10, which act as a mould.
The result is a strong, lightweight cable joint that is pressure resistant and impervious to the ingress of moisture. Longitudinal tensile stress in the cable is transferred via the splayed and deformed armour wires to the epoxy resin filler within the tapered or conical end forms. Some of the stress is transferred further to the housing sections 10 and, via the bonded joint f Oc to the other end section, and thence back through the filler to the armour wires of the other cable end.
The fabrication of the housing end sections 10 is cheap compared with traditional steel housings. Each end section is easily fabricated on a removable mandrel, the only machining then required being to the joint areas to ensure good joints, and to the tapered extremity to provide a good fit for the "U"-ring seal.
The completed joint is very strong. Typical test figures for a joint on a 5 inch diameter cable with a housing of total length 48" show that it will withstand at least a 30 ton tensile stress.
As an alternative to a two part housing as shown in the drawing the housing can be made in, e.g. three parts. A central plain tubular section can be joined to two tapered end sections. Such a construction is shown in the figure with a machined overlap joint fOe between the central section and the tapered end section. This may be reinforced with a joining sleeve 1 8b if desired (shown in dotted outline only). This allows a versatile system to be built up with common end sections usable with a variety of different length central sections.
Whilst mention has been made of glass filament reinforcement of the epoxy resin composite, other filamentary materials are also available, e.g. KEVLAR (Reg. Trade Mark), carbon fibre, polyester etc. Also the lay angle of the filament can be different at different parts of the tube to provide required tensile/loop stress performance at difference positions.
CLAI MS:
A submarine cable joint housing comprising at least two housing end sections each formed as a hollow tube filament wound epoxy resin composite, each end section being formed with one internally tapered end portion with adjacent housing sections jointed together by bonded joints between non-tapering portions of the sections, at least one housing section being provided with a filler hole through which the completed housing is filled with a loaded epoxy resin filler compound.
2. A joint housing according to claim 1 wherein two tapered end sections are combined with a central plain tubular section.
3. A joint housing according to claim 1 or 2, wherein the sections are jointed by means of machined overlap joints.
4. A joint housing according to claim 1 or 2, wherein the joints between the sections are provided with internal close fitting sleeves forming lap joints with the sections.
5. A joint housing according to any preceding claim wherein the epoxy resin composite is reinforced with a wound glass filament.
6. A submarine cable joint housing substantially as described with reference to the accompanying drawing.
7. A method of jointing an armoured submarine cable including the steps of spreading and deforming the ends of the armouring wires or tapes adjacent each cable end, enclosing the cable joint within a tubular filament wound epoxy resin housing having internally tapered end portions closely fitted the external covering of the cable, and filling the housing with a loaded epoxy resin compound.
8. A method of jointing an armoured submarine cable substantially as described with reference to the drawing.
9. An armoured submarine cable joint comprising a tubular housing with internally tapered end portions closely fitting the outer sheath of the submarine cable wherein the armouring wires or tapes adjacent each cable end are splayed and deformed within each tapered end portion, characterised in that the housing is fabricated from filament wound epoxy resin sections adhesively bonded together and potted with a loaded epoxy resin system.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
- **WARNING** start of CLMS field may overlap end of DESC **.stress in the cable is transferred via the splayed and deformed armour wires to the epoxy resin filler within the tapered or conical end forms. Some of the stress is transferred further to the housing sections 10 and, via the bonded joint f Oc to the other end section, and thence back through the filler to the armour wires of the other cable end.The fabrication of the housing end sections 10 is cheap compared with traditional steel housings. Each end section is easily fabricated on a removable mandrel, the only machining then required being to the joint areas to ensure good joints, and to the tapered extremity to provide a good fit for the "U"-ring seal.The completed joint is very strong. Typical test figures for a joint on a 5 inch diameter cable with a housing of total length 48" show that it will withstand at least a 30 ton tensile stress.As an alternative to a two part housing as shown in the drawing the housing can be made in, e.g. three parts. A central plain tubular section can be joined to two tapered end sections. Such a construction is shown in the figure with a machined overlap joint fOe between the central section and the tapered end section. This may be reinforced with a joining sleeve 1 8b if desired (shown in dotted outline only). This allows a versatile system to be built up with common end sections usable with a variety of different length central sections.Whilst mention has been made of glass filament reinforcement of the epoxy resin composite, other filamentary materials are also available, e.g. KEVLAR (Reg. Trade Mark), carbon fibre, polyester etc. Also the lay angle of the filament can be different at different parts of the tube to provide required tensile/loop stress performance at difference positions.CLAI MS: A submarine cable joint housing comprising at least two housing end sections each formed as a hollow tube filament wound epoxy resin composite, each end section being formed with one internally tapered end portion with adjacent housing sections jointed together by bonded joints between non-tapering portions of the sections, at least one housing section being provided with a filler hole through which the completed housing is filled with a loaded epoxy resin filler compound.
- 2. A joint housing according to claim 1 wherein two tapered end sections are combined with a central plain tubular section.
- 3. A joint housing according to claim 1 or 2, wherein the sections are jointed by means of machined overlap joints.
- 4. A joint housing according to claim 1 or 2, wherein the joints between the sections are provided with internal close fitting sleeves forming lap joints with the sections.
- 5. A joint housing according to any preceding claim wherein the epoxy resin composite is reinforced with a wound glass filament.
- 6. A submarine cable joint housing substantially as described with reference to the accompanying drawing.
- 7. A method of jointing an armoured submarine cable including the steps of spreading and deforming the ends of the armouring wires or tapes adjacent each cable end, enclosing the cable joint within a tubular filament wound epoxy resin housing having internally tapered end portions closely fitted the external covering of the cable, and filling the housing with a loaded epoxy resin compound.
- 8. A method of jointing an armoured submarine cable substantially as described with reference to the drawing.
- 9. An armoured submarine cable joint comprising a tubular housing with internally tapered end portions closely fitting the outer sheath of the submarine cable wherein the armouring wires or tapes adjacent each cable end are splayed and deformed within each tapered end portion, characterised in that the housing is fabricated from filament wound epoxy resin sections adhesively bonded together and potted with a loaded epoxy resin system.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08310159A GB2138088A (en) | 1983-04-14 | 1983-04-14 | Submarine cable joint housing |
| FR8405673A FR2544562A1 (en) | 1983-04-14 | 1984-04-10 | SHIELDED SUBMARINE CABLE JUNCTION, HOUSING FOR SUCH A JUNCTION, AND METHOD FOR JOINING SUCH A CABLE |
| NO84841450A NO841450L (en) | 1983-04-14 | 1984-04-11 | UNDER-CABLE SKATE BOX |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08310159A GB2138088A (en) | 1983-04-14 | 1983-04-14 | Submarine cable joint housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8310159D0 GB8310159D0 (en) | 1983-05-18 |
| GB2138088A true GB2138088A (en) | 1984-10-17 |
Family
ID=10541113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08310159A Withdrawn GB2138088A (en) | 1983-04-14 | 1983-04-14 | Submarine cable joint housing |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR2544562A1 (en) |
| GB (1) | GB2138088A (en) |
| NO (1) | NO841450L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2195786A (en) * | 1986-08-20 | 1988-04-13 | Plessey Co Plc | Hybrid electrical and non-electrical connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874895A (en) * | 1957-02-13 | 1961-08-16 | Silec Liaisons Elec | Improvements in or relating to the protection of junctions between electric cables |
| GB1102837A (en) * | 1966-01-13 | 1968-02-14 | Pirelli General Cable Works | Improvements in or relating to the jointing of electric cables |
| GB1500082A (en) * | 1974-10-12 | 1978-02-08 | Felten & Guilleaume Kabelwerk | Terminal insulator fittings for high tension electric cables |
| GB2059691A (en) * | 1979-09-29 | 1981-04-23 | Pirie J K | Underwater cable terminations |
-
1983
- 1983-04-14 GB GB08310159A patent/GB2138088A/en not_active Withdrawn
-
1984
- 1984-04-10 FR FR8405673A patent/FR2544562A1/en not_active Withdrawn
- 1984-04-11 NO NO84841450A patent/NO841450L/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB874895A (en) * | 1957-02-13 | 1961-08-16 | Silec Liaisons Elec | Improvements in or relating to the protection of junctions between electric cables |
| GB1102837A (en) * | 1966-01-13 | 1968-02-14 | Pirelli General Cable Works | Improvements in or relating to the jointing of electric cables |
| GB1500082A (en) * | 1974-10-12 | 1978-02-08 | Felten & Guilleaume Kabelwerk | Terminal insulator fittings for high tension electric cables |
| GB2059691A (en) * | 1979-09-29 | 1981-04-23 | Pirie J K | Underwater cable terminations |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2195786A (en) * | 1986-08-20 | 1988-04-13 | Plessey Co Plc | Hybrid electrical and non-electrical connector |
Also Published As
| Publication number | Publication date |
|---|---|
| NO841450L (en) | 1984-10-15 |
| GB8310159D0 (en) | 1983-05-18 |
| FR2544562A1 (en) | 1984-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |