CN105655963A - Fixed flange assembly and construction method for fixed flange assembly - Google Patents
Fixed flange assembly and construction method for fixed flange assembly Download PDFInfo
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- CN105655963A CN105655963A CN201410643633.4A CN201410643633A CN105655963A CN 105655963 A CN105655963 A CN 105655963A CN 201410643633 A CN201410643633 A CN 201410643633A CN 105655963 A CN105655963 A CN 105655963A
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Abstract
The invention discloses a fixed flange assembly which is arranged at an end portion of a submarine power cable ascending from the seabed to the land, and particularly relates to a transformation tower or an offshore iron tower, before checking manhole connection with the submarine power cable, the submarine power cable is fixed, sea side pulling and vibration transmitted through the submarine power cable are cut off, ground connection is further carried out, after ground connection and terminal leather peeling of the submarine power cable, a curved face of an exposed armour wire form a fixed flange, the fixed flange bends backwards at the same curvature radius for fixing, the ground contact area can be improved, the folded armour wire is fixed by a clamp, endurance of the connection portion is reinforced to improve ground connection efficiency and shorten the construction time, the upper portion flange and the lower portion flange are respectively cut off in upper and lower directions, and the fixed flange assembly has a left side portion and a right side portion which can be easily separated or bonded. The invention further relates to a construction method for the fixed flange assembly.
Description
Technical field
The present invention relates to one and pass through seabed, on rise on the end of the delivery electricity subsea power cable on land the associated viscera of mounting flange assembly arranged, more detailed refer to transformation tower, marine steel tower, before wind-force or inspection chamber connect subsea power cable, undersea cable is fixed, cut off the vibration tilting (pulling) to sea side and being passed on by subsea power cable, carry out ground connection simultaneously, but above-mentioned ground connection possess with the terminal crust of subsea power cable is peeled off after, the same radius-of-curvature of the mounting flange that sheathing wire (ArmourWire) curved surface that appears is formed is bending to rear to be fixed, can increasing contact area, folding sheathing wire is fixed by clamp, and the weather resistance etc. of strengthening connecting portion increases ground connection efficiency and shortens the engineering time, upper flange and lower flange separately with upper and lower to cutting off, the associated viscera of the constructional method of the mounting flange assembly that left side can easily be separated with right side or combine and mounting flange assembly.
Background technology
Subsea power cable refers to the power line that the horizontal slotting subsea power of aerogenerator for the supply of island electric power or for sea setting carries out power transmission and arrange. The cable that distribution subsea power cable 50 is formed by conductor 541, cable endodermis 542, shielding layer 543, cable sheath layer 544 such as Fig. 1 forms three-phase cable 54, three-phase cable 54 and optical cable 55 are made up of the integument formed in turn according to endothelium 53 and sheathing wire 52 and crust 51, and endothelium and outer micromicro are formed by various material multilayer.
Generally prevent power cable from getting an electric shock; when suppressing abnormal, current potential rises; prevent because high frequency communication obstacle signal obstacle occurs; guarantee benchmark current potential; prevent from forming ground connection because of most security purposes such as abnormal voltage insulation breakdowns; but subsea power cable is because arranging the singularity of environment, it it is the structure of ground connection difficulty. Beyond the object more than talked about, the object of ground connection is more, but less with the flange assembly relation of this subsea power cable.
Namely, ground connection is the safety in order to guarantee human life and property, the utilization of the stable system of various electrical equipment, electronics and arrange, but as the earth, current potential or potential difference can not be carried out minimumization between the middle attachment zone of subsea power cable, because of the major insulation body externally conducts ground current continuously of sheathing wire and three-phase electrical cable, circulating current or the current potential of grounding current in end point improve. The noble potential circulating current of these subsea power cables or grounding current can not to multiple directions dispersion conduction but there is irregular flowing, a variation phenomenon for point that concentrates on, thus the position that can understand electrical equipment is mutually unstable.
The linker mounting flange assembly major part of the subsea power cable terminal end of present domestic use uses from Japan and imported from Holland, and the mode of connection form of these import goods is different, ground connection degradation in efficiency; And shorten the insulation life of subsea power cable, it is the one of the main reasons of the accident of causing power failure.
Mounting flange assembly is different from the cable of submarine laying, trend and flow velocity can not be caused very big impact; Tension stress and the waterproof of persistence can be ensured, promote that ground connection efficiency improves. The representative essential factor improving the ground connection efficiency of subsea power cable connects cross-sectional area and electric conductivity.
Connection cross-sectional area in the present invention refers to that the similar grounding current such as the abnormal current flowed in the major insulation body of sheathing wire and three-phase cable or the induced current that magnetic field occurs is to the associated contact area of the mounting flange of mounting flange assembly and grounding wire circulate.
The mounting flange assembly 120 of Fig. 2 is the mounting flange 121,122 formed by two stainless steel ring structures, need not consider the columnar morphology of the curvature of sheathing wire 123, and very restriction connects cross-sectional area. Further, the grounding construction mode of three-phase cable 124 and grounding function is very poor, because there is no other connection junction box, add the function of junction box with heat-shrinkable tube. This needs to utilize adhesive tape and electric tape to be wound around, and cover heating collapsible tube repeatedly, thus needs the long-time engineering time.
Further, the former mounting flange assembly of other forms, uses junction box in order to the time in ground connection efficiency and minimizing construction. Because adding junction box, all weight reaches more than 80kg, causes carrying out operation construction in the inspection chamber in coastal waters very difficult. And because the volume of this mounting flange assembly is big, major part need to carry out the symmetric form assembling of side, left and right, and this is the reason comparing a single build ground connection degradation in efficiency. Thus, exist and from inner ground, the problem that re-starts grounding construction, and subsea power cable cannot be limited to the bending corresponding measure of sea side.
Former mounting flange assembly rust steel (ST304) of Fig. 2 makes, although rust-proof effect is fine, but electric conductivity is poorer than iron. Further, tension stress is the degree pressing sheathing wire with two pliers, because which limit correct fixing sheathing wire.
Just as described above, in order to increase subsea power cable and the contact area of mounting flange assembly, point out the method for the size increasing mounting flange assembly, but this not only increases the manufacturing cost of mounting flange assembly, weight and volume because increasing causes mobile inconvenience, has the shortcoming increasing the engineering time.
Summary of the invention
The technical problem solved
Accordingly, the mounting flange assembly of the delivery electricity subsea power cable of the present invention and constructional method thereof are as follows:
Form curved surface by the mounting flange of mounting flange assembly, it is connected with the curved surface of the sheathing wire of subsea power cable, after bending to rear, clamp is fixed.Its objective is to provide and increase contact area, increase ground connection efficient appliances.
And, it is an object of the invention on subsea power cable arrange junction box and clamp be mutually connected by the conical surface, even if sheathing wire is to the pulling force effect in direction, sea, because of the holding that subsea power cable is powerful, can prevent from involving and the breakage of subsea power cable, the safe power transmission of electric power can be carried out.
Technical scheme
In order to realize above-mentioned problem, the mounting flange assembly of the delivery electricity subsea power cable of the present invention has following feature:
Contain: pass through seabed, the subsea power cable realizing electric power supply and communication connection between land and the marine structure arranged is fixed on the structure at land or sea, the mounting flange assembly of the grounding current that subsea power cable occurs the externally mounting flange of ground connection and the junction box of built-in above-mentioned mounting flange; Mounting flange is separated with lower flange by the upper flange concluded by bolt and forms, and is formed centrally through hole in respective; After subsea power cable passes, the crust of the subsea power cable between upper flange and lower flange peels off, exposes certain length, after being connected with the sheathing wire cut off, passes on and receives grounding current; After the earth stud that is combined with external ground line on the side of upper flange and lower flange connects, from the three-phase cable of sheathing wire and subsea power cable, pass on the grounding current externally ground connection of reception; But lower flange is formed by elliptical shape ball, the oval groove of the bottom surfaces of upper flange formation corresponding to lower flange upper side, increase and the contact area of sheathing wire, upper flange and lower flange separately with upper and lower to cut-out, can be formed left side and right part from or combine.
The clamp that sheathing wire end side is fixed to subsea power cable has been set up in the place isolated at a certain distance in the bottom of mounting flange.
Junction box is made up of junction box flange and junction box body. Wherein junction box flange defines the through hole through subsea power cable in center, and bottom facility is formed fixing combined hole. And the mounting flange included in junction box body and clamp combine at junction box flange place; After on upper end, seabed power cable dials shell, the three-phase cable only exposed just can pass, and forms the vent pipe portion reducing diameter, side is formed external ground line distribution.
Invention effect
According to above-mentioned solution means, the mounting flange assembly of the delivery electricity subsea power cable of the present invention refers to:
Mounting flange forms curved surface, and sheathing wire reverse bending, is connected continuously with mounting flange, thus can increase contact area, increases ground connection efficiency, carries out stable power supply supply.
And the clamp of fixing sheathing wire is combined by the conical surface with junction box flange, if thus undertaken involving pulling force effect to direction, ocean by subsea power cable, the portion of tightening up of clamp forms pressurization, offsets pulling force etc. along the conical surface of the annular relief of junction box flange to central axis direction, can strengthen weather resistance, maintain subsea power cable safely.
And, the top junction box body separation that junction box body is discharged by three-phase cable is formed, as long as exchanging top junction box body, the diameter of subsea power cable that just can be corresponding various is constructed, the subsea power cable peeled off need not carry out winding operation fine and closely wovenly, also after stiffening agent is injected in junction box inside, integrally can solidify. Thus the time needed for being wound around of having saved can be provided, useful device and the constructional method of all engineering times can be shortened.
Accompanying drawing explanation
Fig. 1 is the structure display summary sectional view of general subsea power cable.
Fig. 2 is the display sketch chart of mounting flange in the past.
To be that the subsea power cable of the mounting flange of the installation of the present invention and clamp is illustrated arrange sectional view to Fig. 3.
Fig. 4 a is the illustrated orthographic plan of upper flange and the sectional view of the mounting flange of the present invention.
Fig. 4 b is the illustrated orthographic plan of lower flange and the sectional view of the mounting flange of the present invention.
Fig. 4 c be the mounting flange that forms of the upper flange of the present invention and lower flange in conjunction with sectional view.
Fig. 4 d is the anti-slip tank of the present invention or the anti-skidding illustrated sketch chart of the upper flange convexed to form.
Fig. 5 is the illustrated orthographic plan of clamp and the front elevation of the mounting flange assembly of the present invention.
Fig. 6 a is the illustrated detached section figure of junction box of the present invention.
Fig. 6 b is the junction box flange of the present invention and the enlarged view of the cohesive process cross-section illustration of clamp.
To be that the installment state of the mounting flange assembly of the present invention is illustrated arrange sectional view to Fig. 7.
The illustrated outline of citing that Fig. 8 is the divergence type junction box body installation of the present invention arranges figure.
Fig. 9 a to Figure 10 is the illustrated orthographic plan of other forms of the junction box body of the present invention, side elevational view and active state figure.
Drawing reference numeral:
10-mounting flange assembly; 20-mounting flange; 21-upper flange; 22-lower flange; 23-bolt hole; 24-anti-slip tank; The anti-skidding projection of 25-; 26-earth stud; 27-bolt; 261-ground connection is clamped; 262-inner ground line; 263-external ground line; 30-clamp; 31-tightens up portion; The 311-conical surface; 40-junction box; 41-junction box flange; 42,46-junction box body; 43-sealing-ring; 44-top junction box body; 45-bottom junction box body; Hole concluded by 411,467-bolt; 412-annular relief; 413-groove portion; The 414-conical surface; 415-end cap; 421,461-vent pipe portion; 422-ground hole; 423-inlet; 462-horizontal extension district; 463-body resettlement section; End flanges portion under 464-; 465-horizontal flange portion; 50-subsea power cable; 51-crust; 52-sheathing wire; 53-endothelium; 54-three-phase cable; 55-optical cable; 541-conductor; 542-cable endodermis; 543-shielding layer; 544-cable sheath layer.
Embodiment
The mounting flange assembly of the present invention has following feature: contains and passes through seabed, the subsea power cable forming electric power supply and communication connection between the structure at land or sea is fixing on the structure at land or sea, the mounting flange assembly of the grounding current that subsea power cable occurs the externally mounting flange of ground connection and the junction box of built-in mounting flange; Mounting flange concluded by bolt, be separated with lower flange by upper flange and form, and forms through hole in the heart, through subsea power cable in respective; After the crust of subsea power cable being peeled off between upper flange and lower flange, the certain length that exposes, after being connected with the sheathing wire cut off, reception and registration accepts grounding current; The side of upper flange and lower flange is connected with the earth stud in conjunction with external ground line, the grounding current externally ground connection of reception is passed on from the three-phase cable of sheathing wire and subsea power cable, but lower flange forms elliptical shape ball, the oval groove of the bottom surfaces of upper flange formation corresponding to lower flange upper side, can increase the contact area with sheathing wire.
Further, the one side of certain in the bottom surfaces of upper flange and the upper side of lower flange or two sides all can form multiple anti-slip tanks or anti-skidding projection with concentric(al) circles.
Further, the clamp that sheathing wire end side is fixed to undersea force cable has been set up in the place of certain distance isolation on the bottom of mounting flange; Reverse folding sheathing wire is adjacent to outside the lower flange of mounting flange, can enlarge active surface.
Further, junction box forms the through hole through subsea power cable by center, bottom define the fixing combined hole of facility junction box flange and; Include mounting flange and clamp, junction box flange combines, upper end forms the vent pipe portion that subsea power cable peels off the reduced that three-phase cable rear, that expose just can pass, and side is formed the junction box body of the ground hole of external ground line distribution and forms.
At this moment clamp is to be wound around by subsea power cable, by multiple clamp lower portion extend, but extend to exterior portion define to center position formed the inclination conical surface tighten up portion; Junction box flange is outstanding to top at centre portions, form the annular relief in the portion of tightening up of collecting clamp, but the interior face of annular relief forms the conical surface corresponding with the conical surface of clamp, on subsea power cable, the pulling force of effect can be carried out tightening force effect by the conical surface of clamp and junction box flange at clamp place.
These junction box bodies are separated with the bottom junction box body including mounting flange by the top junction box body forming vent pipe portion and form, only need to exchange the top junction box body that the vent pipe portion of various diameter is formed, may correspond to the three-phase cable that various size is set.
Utilize the constructional method of the mounting flange assembly of the present invention to comprise with the next stage simultaneously:
After subsea power cable is isolated at a certain distance from end and is peeled off by crust so that the stage that sheathing wire exposes; The sheathing wire exposed, by mounting flange, calculates the distance being combined with clamp, the stage of cut-out; First subsea power cable inserts the stage of junction box flange and sealing-ring; Subsea power cable arranges part ethylene-propylene rubber(EPR) (ethylenepropylenerubber, the EPR) winding of lower flange thus prevents the stage that the mounting flange lower flange of extruding is arranged; The foreign matter pasted on the surface of excision sheathing wire, sheathing wire is connected to the outside of lower flange, one by one reverse bending, the stage of excision endothelium; Pacifying upper flange to the insertion of reverse folding sheathing wire top, the stage carrying out adherence concluded by upper flange and lower flange bolt; Utilize clamp that at the crust of subsea power cable, sheathing wire end is carried out the adherence fixing stage; After the definite part of the crust of three-phase cable peels off, after exposing shielding layer and ground connection pincers combination, carry out the stage being connected with the earth stud fixing in upper flanges with inner ground line; The stage that the earth stud of upper flanges is connected with external ground line; Mobile junction box flange, after being closely combined with the portion of tightening up of clamp, is fixed with sealing-ring in annular relief, and junction box body and the junction box flange clamped on subsea power cable and bolt carry out the stage concluded; By the inlet of junction box body side, internally stiffening agent is injected in space, carries out the stage of integration.
With reference to the following drawings, can more detailed explanation the present invention. But accompanying drawing is the example in order to the technical content of the present invention and scope are carried out simple illustration and enumerated, and is not therefore that the technical scope to the present invention limits or changes. And being illustrated as basis with these, in the technical scope of the present invention, practitioner can carry out various distortion and change.
The mounting flange assembly used in the present invention passes through seabed, the sheathing wire (AmourWire) of the subsea power cable that the subsea power cable forming electric power supply and communication connection between land and the marine structure arranged is fixing on the structure at land or sea carry out position fixing after, cut off the vibration caused because of pulling force or great waves and pass on.Further, the grounding current produced in three-phase cable improves electric conductivity to increase the connection cross-sectional area with mounting flange, forms ground connection externally, and junction box, by injecting stiffening agent, has excised the winding process of three-phase cable, can construct rapidly. Herein, fixing means that subsea power cable exposes after on seawater face, forms ground connection and fixing part.
The mounting flange assembly arranged on the terminal part side of the subsea power cable in this kind of the present invention is made up of the mounting flange being fixed after the reverse parcel of sheathing wire of subsea power cable.
Fig. 3 is the mounting flange of the present invention and the sectional view of clamp installation, Fig. 4 a is diagrammatic plan view and the sectional view of the upper flange of mounting flange in the present invention, Fig. 4 b is diagrammatic plan view and the sectional view of the lower flange of the mounting flange in the present invention, Fig. 4 c be the mounting flange that forms of the upper flange in the present invention and lower flange in conjunction with sectional view.
As with reference to finding, the form of the ring that mounting flange 20 is formed with the through hole passed at center subsea power cable 50, is separated with lower flange 22 by upper flange 21 and forms.
The sheathing wire 52 of subsea power cable it has been mingled with between upper flange 21 and lower flange 22, lower flange 22, as shown in Figure 4 b outside with elliptical shape ball image formation curved surface, is connected with lower flange 22 top and side to the sheathing wire 52 of the reverse bending of direction of travel and bends. Further, upper flange 21 is arranged on lower flange top, is carried out adherence with lower flange by bolt conclusion. The bottom surfaces of upper flange is formed by the oval groove corresponding with the curved surface of lower flange upper side, and the sheathing wire being mingled with between upper flange and lower flange when bolt is concluded carries out powerful pressurization and carries out adherence. At this moment upper flange and lower flange bolt conclude as shown in the drawing, the concentric(al) circles formed by multiple bolt hole 23 carry out inner side arrangement and outside arrangement form or carry out various pattern formations such as arrangement with a circle.
These mounting flanges 20 are formed by the metal material with conductivity, improve ground connection efficiency by increasing the contact area with sheathing wire 52; By sheathing wire, grounding current can pass on rapidly reception, externally carries out ground connection. Thus, mounting flange 20 forms one with earth stud 26 on the side of portion's flange 21, and is connected with external ground line 263; Earth stud 26 is connected with three-phase cable and the inner ground line 262 of subsea power cable, forms external ground.
, as shown in figure 4d, further in the bottom surfaces of upper flange 21 and the upper side of lower flange 22, multiple anti-slip tanks 24 or anti-skidding protruding 25 that formation has concentric(al) circles all go up on certain one side or two sides; Sheathing wire 52 can firmer being fixed on mounting flange 20. At this moment, upper flange 21 and lower flange form anti-slip tank at one side, form corresponding anti-skidding projection in his side, are connected formation each other.
Fig. 5 is diagrammatic plan view and the front elevation of the clamp of the mounting flange assembly in the present invention.
As shown in the figure, the clamp 30 in the present invention is formed with semicircle, after one pair of conclusion or being formed by the rounded form of a side opening, can conclude. The sheathing wire 52 of these clamps and adherence on the outside of subsea power cable 50 and subsea power cable is concluded simultaneously, fixing with sheathing wire and subsea power cable one.
These clamps 30 define the portion of tightening up 31 that lower portion extends, and can combine at junction box flange 41 place.The direction, bottom that the portion of tightening up 31 of clamp combines to junction box flange from the body of band shape is multiple outstanding with two or more, the inner side of the annular relief 412 that insertion junction box flange 41 is formed. Herein, the conical surface 311 defining the cone wide at the top and narrow at the bottom tilted to center position outside portion 31 is tightened up; After entering in the annular relief 412 of junction box flange, there is tightening force to center.
This kind of mounting flange 20 and clamp 30 are coated with nano-substance coating agent or rust-preventive agent outside, can prevent corrosion, thus can forever use.
Fig. 6 a is that the diagram including the junction box of mounting flange with clamp in the present invention is separated sectional view.
Shown in reference, the junction box flange 41 of the combined hole being fixed on facility formed on the bottom that junction box 40 is formed by the through hole passed at center subsea power cable 50, include mounting flange 20 and junction box body 42 that clamp 30 combines on junction box flange and form.
Hole 411 concluded by multiple bolt that junction box flange 41 forms collar plate shape in outside, forms junction box body 42 and bolt conclusion, medial center part defines the annular relief 412 outstanding to top.
Annular relief 412 is as shown in Figure 6 b, formed to the external direction of the subsea power cable passed, bottom is formed the groove portion 413 of expansion, after preventing one or more insertion of sealing-ring 43 that isolation gap occurs between subsea power cable and junction box flange from arranging, due to the sealing-ring that insertion is arranged, can prevent junction box flange lower portion from extruding.
And, the top of annular relief 412 is formed the conical surface 414 corresponding to the conical surface 311 tightening up portion with clamp, clamp tightens up the conical surface 311 in portion after the annular relief conical surface 414 decline, tight to the inside, to subsea power cable direction, more powerful tightening force can occur.
And, the formation that junction box flange 41 more strengthens than junction box body diameter, form multiple bolts in outside and conclude hole, facility carries out bolt conclusion and fixes, or junction box flange lower portion direction forms annular relief 412 as shown in the figure, the annular relief formation bolt conclusion hole 411 that bottom is outstanding, can carry out bolt conclusion on facility. At this moment isolate at a certain distance with facility and junction box flange bottom with the conclusion of facility and arrange. Can prevent junction box from exposing in the water of the flows of facility.
Further, the lower end of the annular relief that lower portion is outstanding can be combined with next fixing facility of end cap 415. At this moment, the combination of junction box flange and facility is with bolt end cap through rear combination, end cap and facility in conjunction with commutative formation.
Next, junction box body 42 form the crust of subsea power cable and Endothelial denudation in upper end, sheathing wire through the vent pipe portion 421 of the three-phase cable 54 exposed, side is formed in external ground line 263 ground hole 422 entered with the state excised.
The diameter in vent pipe portion 421 only three-phase cable and optical telecommunication cables by and formed, mounting flange is formed by the pipe body of the diameter less than the diameter including part. The end in these vent pipe portions is also combined with end cap, can maintain the resistance to air loss of junction box internal space.
And; the vent pipe portion 421 of junction box body 42 defines one or more stiffening agent inlet 423; injecting stiffening agent between the final junction box internal holes assembled, the thin skin part of subsea power cable need not be wound around individually and just can protect, and can construct rapidly.
Junction box body 42 is as shown in Figure 8, it is separated with the bottom junction box body 45 of mounting flange to form by including top junction box body 44 that vent pipe portion formed, the end of the top junction box body of separation and the linking of bottom junction box body forms flange, can conclude by bolt and integrally form.
Thus, for convenience of the exchange of vent pipe, the top junction box body 44 forming vent pipe portion 421 is formed by the three-phase electrical cables separate of various diameter. That is, the three-phase cable of subsea power cable possess 60,200,400,500,1000mm2Etc. various cross-sectional area, the junction box body in the vent pipe portion forming associated diameters is set so corresponding with it. But because of vent pipe portion diameter problem, the mode that junction box body entirety replaces needs the junction box body occupying large volume of multiple preparation each vent pipe portion all size; During accessory prepares, costly and certainly property and carrying property reduce. Thus, only need to prepare to be formed the top junction box body 44 of various size in vent pipe portion. Bottom junction box body 45 uses with unified form, minimization deformation position, reduces accessory and prepares expense, can improve preservation and the carrying property of accessory. The separation of junction box body is formed beyond form as shown in the figure, and only vent pipe portion takes off attached form can provide.
In other embodiments of the junction box body 46 of the present invention as shown in Fig. 9 a, Fig. 9 b and Figure 10, cone can be formed at bottom.
The vent pipe portion 461 that junction box body 46 is passed by three line cables, expand, increase the horizontal extension district 462 of diameter laterally with the lower end in vent pipe portion, with the body resettlement section 463 of the cone gradually reducing diameter that the edge lower portion from horizontal extension district extends, and the lower end flanges portion 464 that the lower end horizontal expansion laterally of body resettlement section is combined with junction box flange forms; But junction box body by vertical two points and form, the end of separation is formed vertical flange portion 465, the form that two junction box bodies of two points combine can be provided.
Namely, junction box body 46, vertically to be formed the body of two points, both sides as benchmark, is therefore installed in advance on subsea power cable, does not assemble up and down, in the fixing state completed of sheathing wire, the junction box body 46 of part row to the left on the right side one pair can be concluded after being connected with the both sides of mounting flange.
The upper diameter of the inner built-in mounting flange 20 of these junction box bodies 46 is relatively big, and lower diameter reduces, and by internal space minimumization, the injection rate combining the stiffening agent of injection after completing also can be reduced.
Further, defining multiple bolts and conclude hole 467 in the horizontal extension district 462 of junction box body, mounting flange and bolt can be concluded. As shown in Figure 10, the length in conjunction with the bolt 27 of mounting flange 20 extends, and concludes hole 467 by the bolt of junction box body and externally exposes, thus in conjunction with nut, mounting flange 20 and junction box body 46 can be carried out integration. That is, the bolt 27 that mounting flange and junction box body connect upwards inserts from the lower end of lower flange 22, and lower flange 22 and upper flange 21 are sequentially passed, and conclude with the first nut, upper flange and lower flange are fixed.
Next, the bolt 27 outstanding to the upside of upper flange 21 is combined with junction box body 46, hole 467 should be concluded through the bolt of junction box body in the end of bolt, concluding through the bolt end in bolt conclusion hole with the 2nd nut, the gap-forming integration that mounting flange 20 and junction box body 46 can be fixed.Further, the 2nd nut is concluded and is concluded by vertical flange portion 465 bolt between the junction box body of interconnective a pair simultaneously, and junction box body can firm be formed. After the conclusion of upper flange 21 and junction box body 46 refers to that first the junction box body of a pair is concluded in junction box flange 41, the bolt 27 outstanding to fixing lower junction box body top is concluded with the 2nd nut, upper flange and junction box body are isolated with fixing interval, can carry out one fixing.
As mentioned above, by mounting flange 20 He, sheathing wire 52 is connected by the mounting flange assembly 10 that clamp 30 is formed with junction box 40 with the upper flange 21 of mounting flange, ground connection is carried out with external ground line 263 by the earth stud 26 prepared in upper flange, three-phase cable 54 peels off with certain length as shown in Figure 3, clamp 261 with ground connection to be connected with inner ground line 262, the end, side of inner ground line is connected with upper flange earth stud, external ground line can be grounded, the grounding current of subsea power cable 50 is externally after grounding wire 263 ground connection, can be stable carry out power supply supply.
The mounting flange assembly 10 that grounding wire has arranged as shown in Figure 7, after mounting flange 20 reverse bending, fixed on clamp 30 by sheathing wire 52; The portion of tightening up 31 of clamp is combined by the conical surface 311,414 with the annular relief 412 of junction box flange, and firm fixing; Contain mounting flange 20 and clamp 30 in junction box body 42, junction box flange 41 combines. Further, by inner ground line 262 and ground connection pincers 261 in inner, three-phase cable 54 and earth stud 26 are connected, three-phase cable externally ground connection. In this kind of structure, inject stiffening agent, filling space in junction box 40 inside, do not need cable carries out other winding operation, integration can form mounting flange assembly.
The constructional method of the mounting flange assembly in the present invention is as follows:
First the subsea power cable laid calculates from the position that mounting flange assembly is arranged after the distance of standing statue post, cuts off, after subsea power cable is isolated at a certain distance from end and is peeled off by crust, and the stage that sheathing wire exposes.
The sheathing wire exposed, by mounting flange, after calculating the distance combined on clamp, cuts off. General sheathing wire reserves 500mm.
First subsea power cable inserts junction box flange and sealing-ring.
Thus, in subsea power cable, the part ethylene-propylene rubber(EPR) that lower flange is arranged carries out 8��15 times and is wound around, and can prevent the phenomenon that lower flange extrudes backward in construction process, after the lower flange of insertion mounting flange, arranges. This stage contains and utilizes cutter or with agent, foreign substances brea bed on the surface of sheathing wire is carried out the stage excised, also contains the place in lower end flanges position to rear 300��400mm: the epidermis adhesive tape of the subsea power cable of length is wound around, the stage of precious ornamental column skin simultaneously.
Next, contain on the surface of sheathing wire after the foreign matter pasted excises, after each reverse bending that sheathing wire contact in the outside of lower flange, excise endothelium. At this, before sheathing wire is completely bending, after the 300mm place sign of lower end flanges, the stage cut off with cutter.
Next, after inserting upper flange to reverse folding sheathing wire top, carrying out pacifying, upper flange and lower flange bolt are concluded so that the adherence that sheathing wire cannot move, be fixed.
After the combination of mounting flange completes, utilize clamp that sheathing wire end carries out adherence on the crust of subsea power cable and fix.The end of fixing sheathing wire can carry out being wound around arrangement with electric tape or adhesive tape.
Next, after the definite part of the crust of three-phase cable peels off, the shielding layer exposed combines with ground connection pincers, is connected with earth stud fixing in upper flanges with inner ground line. At this, the crust of three-phase cable can peel off 50mm, combines at the shielding layer exposed ground connection pincers.
Further, the earth stud of upper flanges is connected with external ground line, upper flanges and external ground.
After grounding wire has connected, being moved by junction box flange, in annular relief, the portion of tightening up of insertion clamp combines. At this moment sealing-ring inserts fixing in the lower channel portion of junction box flange. Further, subsea power cable inserting junction box body recklessly, external ground line carries out distribution to junction box body exterior, and junction box body interior includes mounting flange, and the lower end of junction box body and junction box flange carry out bolt conclusion.
After being provided with of junction box, by the inlet formed on junction box body side, injecting stiffening agent to junction box internal space, junction box inside stiffening agent is filled. At this, inlet is with multiple formation, junction box fills stiffening agent to be injected by side inlet in the state vertically established, the air of junction box inside is discharged from his side inlet, can be easy to inject stiffening agent to junction box inside, due to the solidifying of stiffening agent injected, Inner Constitution can be impelled to form integration, thus complete the construction of mounting flange assembly.
Claims (5)
1. a mounting flange assembly, it is characterized in that, contain and pass through seabed, the subsea power cable forming the delivery electricity forming electric power supply and communication connection between the structure at land or sea is fixing on the structure at land or sea, on the mounting flange assembly of the grounding current that subsea power cable occurs the externally mounting flange of ground connection and the junction box of built-in mounting flange;
Mounting flange is concluded by bolt, is separated with lower flange by upper flange and forms, forms through hole in the heart, through subsea power cable in separately; Between upper flange and lower flange, the crust of subsea power cable is peeled off certain length rear, that expose, after being connected with the sheathing wire cut off, passes on and accept grounding current; The side of upper flange and lower flange is connected with the earth stud in conjunction with external ground line, the grounding current externally ground connection of reception is passed on from the three-phase cable of sheathing wire and subsea power cable, lower flange forms elliptical shape ball, the oval groove of the bottom surfaces of upper flange formation corresponding to lower flange upper side, to increase the contact area with sheathing wire;
The clamp that sheathing wire end side is fixed to undersea force cable has been set up, on the place of certain distance isolation, in the bottom of mounting flange; Reverse folding sheathing wire is adjacent to outside the lower flange of mounting flange, with enlarge active surface;
Upper flange and lower flange separately with upper and lower to cutting off, left side can be formed with right side and be separated or combine.
2. mounting flange assembly as claimed in claim 1, it is characterised in that, wherein one side in the bottom surfaces of described upper flange and the upper side of lower flange or two sides are formed has multiple anti-slip tank of concentric(al) circles or anti-skidding projection.
3. mounting flange assembly as claimed in claim 1, it is characterized in that, described junction box forms the through hole through subsea power cable by center, bottom defines the junction box flange of the fixing combined hole of facility, with include mounting flange and clamp, combining on junction box flange, the junction box flange body that upper end forms the vent pipe portion that subsea power cable peels off the reduced that three-phase cable rear, that expose passes is formed.
4. mounting flange assembly as claimed in claim 3, it is characterised in that, multiple clamp lower portion of described clamp extends, and to be wound around by subsea power cable, what multiple clamp extended to the inclination conical surface formed towards center position outward tightens up portion; Junction box flange is outstanding to top at centre portions, form the annular relief in the portion of tightening up of collecting clamp, the interior face of annular relief forms the conical surface corresponding with the conical surface of clamp, and on subsea power cable, the pulling force of effect is carried out tightening force effect by the conical surface of clamp and junction box flange at clamp place.
5. mounting flange assembly as described in claim 3 or 4, it is characterized in that, described junction box body is separated with the bottom junction box body including mounting flange by the top junction box body forming vent pipe portion and forms, the top junction box body being made up of the vent pipe portion exchanging multiple diameter, corresponding to the three-phase cable arranging multiple size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410643633.4A CN105655963A (en) | 2014-11-10 | 2014-11-10 | Fixed flange assembly and construction method for fixed flange assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410643633.4A CN105655963A (en) | 2014-11-10 | 2014-11-10 | Fixed flange assembly and construction method for fixed flange assembly |
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| CN105655963A true CN105655963A (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410643633.4A Pending CN105655963A (en) | 2014-11-10 | 2014-11-10 | Fixed flange assembly and construction method for fixed flange assembly |
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Cited By (4)
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| CN107192801A (en) * | 2017-06-05 | 2017-09-22 | 三峡大学 | Big depth of water section water quality online auto monitoring system and monitoring method |
| CN109102958A (en) * | 2018-07-02 | 2018-12-28 | 三峡大学 | The deep-water data transmission line of band connection head |
| CN109869444A (en) * | 2019-03-06 | 2019-06-11 | 中国科学院声学研究所 | It is a kind of for connecting the device of load-bearing tapered sleeve Yu wire armoring load-bearing cable |
| CN114005581A (en) * | 2021-09-17 | 2022-02-01 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Single-core submarine cable armored grounding structure and armored grounding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107192801A (en) * | 2017-06-05 | 2017-09-22 | 三峡大学 | Big depth of water section water quality online auto monitoring system and monitoring method |
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| CN114005581A (en) * | 2021-09-17 | 2022-02-01 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Single-core submarine cable armored grounding structure and armored grounding method |
| CN114005581B (en) * | 2021-09-17 | 2023-01-24 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Single-core submarine cable armored grounding structure and armored grounding method |
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