CN105756027A - Steel floating box anti-icing device suitable for semi-submersible platform in polar ice area - Google Patents
Steel floating box anti-icing device suitable for semi-submersible platform in polar ice area Download PDFInfo
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- CN105756027A CN105756027A CN201610144120.8A CN201610144120A CN105756027A CN 105756027 A CN105756027 A CN 105756027A CN 201610144120 A CN201610144120 A CN 201610144120A CN 105756027 A CN105756027 A CN 105756027A
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- buoyancy tank
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
- E02B17/0021—Means for protecting offshore constructions against ice-loads
Abstract
The invention discloses a steel floating box anti-icing device suitable for a semi-submersible platform in a polar ice area. The steel floating box anti-icing device comprises a fixed platform which is fixed on pile legs, wherein multiple groups of hydraulic permanent-magnetic chuck lifting devices are arranged at the lower part of the fixed platform; anti-icing split steel floating box anti-icing bodies are arranged at the lower parts of the hydraulic permanent-magnetic chuck lifting devices respectively; and the side surfaces of the anti-icing split steel floating box anti-icing bodies are in a wedge shape. According to the steel floating box anti-icing device suitable for the semi-submersible platform in the polar ice area, an enclosed steel floating box generates buoyancy force by virtue of an internal filler and does not have strict requirements on the water tightness; the manufacturing difficulty of the steel floating box is lowered; the phenomenon that similar steel floating box which needs to be strictly enclosed in general sinks in the sea once the water tightness is damaged is avoided; and the reliability of the split steel floating box anti-icing bodies is further improved.
Description
Technical field
The present invention relates to the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform, belong to field of ocean engineering.
Background technology
Increasingly reducing with the minable oil and gas reserves in landing field and the continually developing of navigation channel, polar region, marine site, ice formation, polar region has become the focus marine site that petrol resources exploitation business shows great attention to.Semisubmersible platform has the special feature that due to himself, and especially by the favor of each oil and gas development business, one of the extra large frock that currently becomes in great demand is standby.But the threat that drillng operation safely and reliably is necessary for solving semisubmersible platform from floating ice is carried out in marine site, ice formation, polar region.
Marine site, ice formation, floating ice is many, and ice sheet is thick, wind, wave, stream driving under, fairly large movement will be there is in sea ice.The ocean engineering structure that ice formation is built by the mobile meeting of sea ice produces active force, will be likely to result in the fatigue rupture of marine structure in the course of time.For conventional ocean platform, its upright spud leg is often directly extruded by floating ice, impacts, and in the frequency spectrum of this impact force action, comprise or can cause again during close to works natural vibration period the steady-state vibration of platform, thus accelerating the fatigue failure of platform and affecting orthobiosis and the work of personnel on platform, meanwhile also can cause the inefficacy of pertinent instruments on platform, the final operation life-span reducing platform.
At present, successively work out the ice resistant device of various ways both at home and abroad, some ice resistant device is fixed on spud leg, and some can rely on jacking system such as gear mesh form, roller form to lift along spud leg, and also some arranges fixing ice resistant device etc. with fence type around platform.By the peculiar shape of the outer surface of ice resistant device, it is possible to make ice raft be become bending failure from extruding destruction, reach to open ice, the effect of trash ice.But existing most of fixed ice resistant device running into that ice layer thickness increases, icing rate is accelerated, period that quickly ice condition such as icing is serious again of the accumulation of trash ice and trash ice, its anti-ice effect will be weakened severely, and even loses anti-ice effect.In addition, existing can along spud leg lifting ice resistant device in running, due to gear mesh form easily deform at repeat impact backgear tooth form, the roller of roller form only can single-degree-of-freedom run, ball within roller very easily deforms after the shock of floating ice, both reliabilities are poor, and lowering or hoisting gear very easily lost efficacy under sea water intrusion, the maintenance load in later stage is bigger.For semisubmersible platform, owing to spud leg is larger in size, if with reference to the single integral conical ice resistant structure of small size spud leg Platform Designing, being difficult to control to and installing/dismounting, and the spud leg design of existing semisubmersible platform need to be carried out bigger change.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform, self can provide enough buoyancy, under common ice regime, can realize adapting to SEA LEVEL VARIATION, actively anti-ice, good economy performance.
Technical scheme: for solving above-mentioned technical problem, a kind of steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform of the present invention, including the fixed platform being fixed on spud leg, described fixed platform is installed below some groups of hydraulic permanent-magnetic sucker hoisting apparatus, hydraulic permanent-magnetic sucker hoisting apparatus is connected with the split type steel buoyancy tank anti-ice body of anti-ice, and the side of described split type steel buoyancy tank anti-ice body is wedge shape.
As preferably, described hydraulic permanent-magnetic sucker hoisting apparatus comprises plunger case, plunger, crane arm and permanent magnetic chuck, and described plunger case is fixing on the stationary platform, and plunger is positioned at plunger case, and plunger is connected with crane arm, and crane arm is connected with permanent magnetic chuck.
As preferably, described permanent magnetic chuck being provided with range sensor.
As preferably, described split type steel buoyancy tank anti-ice body comprises alternatively distributed positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling, described positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling are respectively connected with support, and adjacent stent is bolted thus connecting positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling；Permanent magnetic chuck is just being connected with permanent magnetic chuck effect steel plate by described split type steel buoyancy tank anti-ice body.
As preferably, described positive back taper steel buoyancy tank is provided with fixing guide or steady pin, described just falling four point of one circular table steel buoyancy tank be provided with positive back taper steel buoyancy tank with the use of steady pin or fixing guide.
As preferably, it is symmetrical structure that described positive back taper steel buoyancy tank comprises the first epicone lid and first time cone lid, the first epicone lid and first time cone lid, and the cross section of the first epicone lid and first time cone lid is trapezoidal shape；The four point of one circular table steel buoyancy tank that just falling is arc-shaped, and comprising the second epicone lid and second time cone lid, the second epicone lid and second time cone lid is symmetrical structure, and the cross section of the second epicone lid and second time cone lid is trapezoidal shape；The key groove of the first epicone lid and first time cone lid composition is 45 ° to 65 °, and the key groove of the second epicone lid and second time cone lid composition is 45 ° to 65 °.
As preferably, described positive back taper steel buoyancy tank is or/and just falling and be provided with level sensor in four point of one circular table steel buoyancy tank.
As preferably, described first epicone lid and the second epicone lid being equipped with manhole.
As preferably, described positive back taper steel buoyancy tank is or/and just falling and be all filled with solid state foam packing material in four point of one circular table steel buoyancy tank.
As preferably, in described split type steel buoyancy tank anti-ice body, side is provided with several damping devices.
Described hydraulic permanent-magnetic sucker hoisting apparatus is in normally off under common sea ice ice regime.The displacement change that reason is described split type steel buoyancy tank anti-ice body is little, and drinking water change is little, and level sensor is owing to being fixed in split type steel buoyancy tank anti-ice body on wall, the scope that the waterline position of its sensing sets when being in normally off.When SEA LEVEL VARIATION, split type steel buoyancy tank anti-ice body can rely on natural buoyancy effect to move up and down along spud leg, and it is broken by directly bending that certain thickness floating ice clashes into split type steel buoyancy tank anti-ice body.
But when ice condition is quite serious, ice layer thickness increases, icing rate is accelerated, the accumulation of trash ice and trash ice again quickly the phenomenon such as icing the outer surface of split type steel buoyancy tank anti-ice body likely can be made to be freezed by sea ice, thus adding the displacement of split type steel buoyancy tank anti-ice body, its sinking certain position is caused to lose former maneuverable anti-ice effect.The now drinking water of split type steel buoyancy tank anti-ice body is significantly increased, hydraulic permanent-magnetic sucker hoisting apparatus will receive the signal of water level sensor and be activated, when crane arm is moved downwardly to certain position, reception and registration signal is made permanent magnetic chuck open sticking state by range sensor, range sensor will cut out simultaneously, then plunger is lifted up driving crane arm thus promoting split type steel buoyancy tank anti-ice body, and in lifting process, hydraulic permanent-magnetic sucker hoisting apparatus will provide the vertical to ice sheet to be crushed by anti-ice body.When after split type steel buoyancy tank anti-ice body is promoted to certain altitude, namely the drinking water of split type steel buoyancy tank anti-ice body reaches certain value, level sensor will be closed so that hydraulic permanent-magnetic sucker hoisting apparatus cuts out, and split type steel buoyancy tank anti-ice body is discharged by permanent magnetic chuck.Now the deadweight of split type steel buoyancy tank anti-ice body is more than suffered buoyancy, moves downward, and is again vertically crushed by deadweight by ice sheet, finally falls back to equilbrium position so that it is recover original anti-ice mobility.
Namely described split type steel buoyancy tank anti-ice body is just being fallen four point of one circular table steel buoyancy tank by four 1/4th positive inverted round stage steel buoyancy tanks that four positive back taper steel buoyancy tanks corresponding to square spud leg right-angle side and positive back taper steel buoyancy tank are corresponding with spud leg right angle and is being assembled by nested type, each anti-ice chunk is closed stereo structure, by the steady pin nesting with fixing guide and bolt is connected, ring flange is fitted and connected etc. that locking device carries out firm locking between anti-ice chunk, ensure that, when moving up and down, the synchronicity that each anti-ice chunk moves.
Each anti-ice chunk includes being enough to resist casing and the solid state foam packing material that floating ice clashes into.Steel buoyancy tank casing is the direct contact object that platform opposing floating ice clashes into, and its stereochemical structure is positive inverted cone or positive reverse frustoconic, the extruding of floating ice can be destroyed and be changed into bending failure, effectively prevent the floating ice direct effect to spud leg.Steel buoyancy tank casing adopts low temperature resistant Plate Welding to form, and casing offers solid state foam filling access；Packing material is material such as ceramic foam material, the polymeric foamed material etc. with characteristics such as water absorption is low, compressibility is low, density is little, anti-low temperature, can provide enough buoyancy for casing.Each anti-ice chunk from floating on certain water surface, then, after being mutually integrated around spud leg nesting and connected by locking device is firm, also can realize split type anti-ice body and swim in the water surface, keep certain drinking water.
In addition, owing to each anti-ice chunk is to adopt packing material to provide buoyancy, therefore the seal of steel buoyancy tank do not had rigors, thus reducing the manufacture difficulty of steel buoyancy tank, avoid strictly airtight its watertightness of steel buoyancy tank of similar general need once the phenomenon in destroyed seabed of just sinking occurs, further increase the reliability of split type steel buoyancy tank ice resistant device.
Described locking device includes bolt connection, ring flange compact siro spinning technology etc. and each anti-ice chunk carries out firm locking, it is achieved between described split type anti-ice body each steel buoyancy tank chunk, locking is an entirety, it is ensured that along the synchronicity that described spud leg moves up and down；
Described vibration absorber includes being fixed in just to fall four point of one vertical vibration reduction support part of circular table steel buoyancy tank inwall, damping element and rubber damping pad.Damping element has the characteristics such as corrosion-resistant, low temperature resistant, effectiveness in vibration suppression is obvious, is fixed on the vibration reduction support part welded with steel buoyancy tank, is connected to vertical rubber damping pad at damping element outer surface.Under common ice regime, whole split type steel buoyancy tank anti-ice body relies on natural buoyancy to realize moving up and down.When hard ice condition and split type steel buoyancy tank anti-ice body periphery by frozen in ice time, dependence hydraulic permanent-magnetic sucker hoisting apparatus is effected up, then passes through self gravitation and buoyancy magnitude relationship and fall after rise to equilbrium position.And both motions all realize the relative motion with spud leg with rubber damping pad in the sliding friction of spud leg surface.The optional arch of structure etc. of rubber damping pad can bear the shape of more large impact power, buffering energy-absorbing vibration damping.In order to reduce the sliding-frictional resistance of rubber blanket, to carry out certain smooth treatment on the spud leg surface contacted with rubber blanket as adopted impermeable seal to process, smearing the special coating etc. that can reduce outer surface coefficient of friction, also can install on rubber blanket surface simultaneously and there is low-friction coefficient, low temperature resistant, wear-resisting material such as polytetrafluoroethylmaterial material.Vibration absorber, owing to being provided with damping element and rubber damping pad, is equivalent to have double-layer vibration damping effect, and the rubber damping pad of the vibration absorber assembled and spud leg surface gap, between 50mm to 100mm, realize the vibration damping and vibration isolation function of vibration absorber better.
Beneficial effect: the steel buoyancy tank ice resistant device being applicable to ice formation, polar region semisubmersible platform of the present invention, has the advantage that
1, owing to the main body of split type steel buoyancy tank anti-ice body is steel buoyancy tank casing, enough buoyancy can self be provided, under common ice regime, it is possible to achieve adapt to SEA LEVEL VARIATION, actively anti-ice, good economy performance；
2, enclosed steel buoyancy tank relies on inside stuffing to produce buoyancy, watertightness do not had rigors, reduce the manufacture difficulty of steel buoyancy tank, avoid strictly airtight its watertightness of steel buoyancy tank of similar general need once the phenomenon in destroyed seabed of just sinking occurs, further increase the reliability of split type steel buoyancy tank ice resistant device；
3, when ice condition is quite serious, the outer surface of split type steel buoyancy tank anti-ice body is likely to be freezed by sea ice, split type steel buoyancy tank anti-ice body can be promoted certain altitude by hydraulic permanent-magnetic sucker hoisting apparatus, in lifting process, ice sheet is produced vertical ice face active force by split type steel buoyancy tank anti-ice body, easily ice sheet can be smashed destruction, during falling, ice sheet is imposed the effect of vertical ice face by self gravitation by anti-ice body, is again smashed, reaches effectively to resist the threat to platform of the severe ice regime；
4, due to the effect of hydraulic permanent-magnetic sucker hoisting apparatus, it is possible to effectively reduce the phenomenons such as trash ice accumulation on split type steel buoyancy tank and ice raft attachment；
5, vibration absorber is provided with damping element and rubber damping pad, has double-layer vibration damping effect, to realize the vibration damping and vibration isolation function of vibration absorber better.The relative motion of ice resistant device and spud leg realizes in spud leg surface sliding friction form with rubber damping pad, and after making certain process, frictional resistance is little, and up and down motion is easily achieved；
6, adopt steady pin to be connected with the nesting of fixing guide, bolt between the split type steel buoyancy tank each chunk of anti-ice body, ring flange fits tightly connection etc. and carries out firm locking, ensure that, when moving up and down, the synchronicity that each anti-ice chunk moves, and is easily installed and dismantles.
Accompanying drawing explanation
Fig. 1 is the integrally-built front view of the present invention；
Fig. 2 is the integrally-built top view of the present invention；
Fig. 3 is the A-A sectional view of Fig. 1；
Fig. 4 is the B-B sectional view of Fig. 1；
Fig. 5 is the C-C sectional view of Fig. 3；
Fig. 6 is the D-D sectional view of Fig. 3；
Fig. 7 is the structure chart that in Fig. 2, split type positive back taper steel buoyancy tank 41 and positive back taper steel buoyancy tank 42 launch along E-E section view；
Fig. 8 is the partial enlarged drawing at I position of Fig. 4.
Detailed description of the invention
As shown in Figures 1 to 8, the present invention is a kind of split type steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform.It mainly includes and is fixed in the fixed platform 2 of semisubmersible platform spud leg 1 certain position, hydraulic permanent-magnetic sucker hoisting apparatus 3, split type steel buoyancy tank anti-ice body 4, locks the parts such as connecting device 5, vibration absorber 6 that each anti-ice chunk is integrated; it can realize adapting to SEA LEVEL VARIATION, reduces the phenomenons such as Ice-excited vibration impact, the accumulation reducing trash ice and ice raft attachment largely, improve the functions such as effect that open ice; can effectively protect the semisubmersible platform in the operation of ice formation, polar region so that it is dissolve the threat that ice formation floating ice 8 brings.
In the present invention, described hydraulic permanent-magnetic sucker 34 hoisting apparatus 3 comprises plunger case 31, plunger 32, crane arm 33 and permanent magnetic chuck 34, described plunger case 31 is fixing on the stationary platform, plunger 32 is positioned at plunger case 31, plunger 32 is connected with crane arm 33, crane arm 33 is connected with permanent magnetic chuck 34, and described permanent magnetic chuck 34 is provided with range sensor 37.
In the present invention, described split type steel buoyancy tank anti-ice body 4 comprises alternatively distributed positive back taper steel buoyancy tank 41 and the four point of one circular table steel buoyancy tank 42 that just falling, described positive back taper steel buoyancy tank 41 and the four point of one circular table steel buoyancy tank 42 that just falling are respectively connected with support, support comprises long horizontal stay tube 51 and short horizontal stay tube 52, and adjacent stent is bolted thus connecting positive back taper steel buoyancy tank 41 and the four point of one circular table steel buoyancy tank 42 that just falling；Permanent magnetic chuck 34 is just being connected with permanent magnetic chuck effect steel plate 43 by described split type steel buoyancy tank anti-ice body 4.Described positive back taper steel buoyancy tank 41 is provided with fixing guide 412 or steady pin 422, described just falling four point of one circular table steel buoyancy tank 42 be provided with positive back taper steel buoyancy tank 41 with the use of steady pin 422 or fixing guide 412.By the cooperation of steady pin 422 and fixing guide 412, positive back taper steel buoyancy tank 41 is positioned with just four point of one circular table steel buoyancy tank 42.
In the present invention, it is symmetrical structure that described positive back taper steel buoyancy tank 41 comprises the first epicone lid and first time cone lid, the first epicone lid and first time cone lid, and the cross section of the first epicone lid and first time cone lid is trapezoidal shape；The four point of one circular table steel buoyancy tank 42 that just falling is arc-shaped, and comprising the second epicone lid and second time cone lid, the second epicone lid and second time cone lid is symmetrical structure, and the cross section of the second epicone lid and second time cone lid is trapezoidal shape；The key groove of the first epicone lid and first time cone lid composition is 45 ° to 65 °, and the key groove of the second epicone lid and second time cone lid composition is 45 ° to 65 °.Described positive back taper steel buoyancy tank 41 is or/and just falling in four point of one circular table steel buoyancy tank 42 and be provided with level sensor 36.Described first epicone lid and the second epicone lid are equipped with manhole 411,421.Described positive back taper steel buoyancy tank 41 is or/and just falling in four point of one circular table steel buoyancy tank 42 and be all filled with solid state foam packing material.
In the present invention, it is provided with several damping devices 6 inside described split type steel buoyancy tank anti-ice body 4, including vibration reduction support part 61, damping element 62 and rubber damping pad 63, vibration reduction support part 61 is arranged on split type steel buoyancy tank anti-ice body 4 inwall, damping element 62 is arranged on vibration reduction support part 61, and damping element 62 is connected with rubber damping pad 63.
The installation steps of split type steel buoyancy tank ice resistant device:
First fixed platform 2 is welded on the supernatant appropriate location of semisubmersible platform spud leg 1, and bracket 23 is welded on correspondence position, strengthen the bonding strength of fixed platform 2 and spud leg 1.And four are assembled hydraulic permanent-magnetic sucker hoisting apparatus 3 be completely arranged on the appointment position of fixed platform 2.
The inwall that then vibration reduction support part 61 is respectively welded at four positive back taper steel buoyancy tanks 41 is specified position and assembles corresponding damping element 62, rubber damping pad 63, completes the assembling of vibration absorber 6.
Then by one of populated solid state foam and assemble the positive back taper steel buoyancy tank of damping device 6 and positive back taper steel buoyancy tank 41 relies on spud leg to be that object of reference sinking is to specifying position, then by populated solid state foam and assemble the four points of half circular table steel buoyancy tanks of just falling of damping device 6 and namely just falling four point of one circular table steel buoyancy tank 42 and position for anchor point so that guide 412 to be fixed by positive back taper steel buoyancy tank, it is fixed on the nested extremely positive back taper steel buoyancy tank 41 of pin 412 by outside pushing tow instrument, finally by bolt etc. the locking device such as ring flange 53 that both dock strengthened positive back taper steel buoyancy tank 41 further and just fall the connection of four point of one circular table steel buoyancy tank 42.The assembling of split type steel buoyancy tank anti-ice body 4 it is sequentially completed according to this operation.
Finally the liquid level control switch on plunger case 31 and level sensor 36 are coupled together by wire, plunger case 3 and oil feeding reservoirs are coupled together formation closed circuit by passing in and out oil pipe 35, the control switch on permanent magnetic chuck 34 and range sensor 36 are coupled together with wire.So far the installment work of split type steel buoyancy tank ice resistant device is completed.
As shown in drawings, by positive back taper steel buoyancy tank and positive back taper steel buoyancy tank 41 and just four points of half circular table steel buoyancy tanks 42 and the locking device 5 making both consolidate connection form the split type steel buoyancy tank anti-ice body 4 of the present invention.Each anti-ice chunk is closed stereo structure, including possessing the casing being enough to resist floating ice impact strength and solid state foam packing material.Steel buoyancy tank casing is the direct contact object that platform opposing floating ice clashes into, and its stereochemical structure is positive inverted cone or positive reverse frustoconic, it is possible to the extruding of floating ice is destroyed and is changed into bending failure, effectively prevent the floating ice direct effect to spud leg.Four the closed positive back taper steel buoyancy tanks corresponding for spud leg right-angle side and positive back taper steel buoyancy tank 41, as shown in Figure 5, its cone angle is between 45 ° to 65 °, and the first epicone lid is up-small and down-big, and first time cone lid is for up big and down small, and both are symmetrical structure, are integrated.For the just four points of half circular table steel buoyancy tanks 42 of four corresponding to spud leg right angle, as shown in Figure 6, its cross sectional shape is two symmetrical trapezoidal compositions, hypotenuse acute angle is also between 45 ° to 65 ° and positive back taper steel buoyancy tank 41 cone angle formed objects, it is ensured that can be intact between anti-ice chunk embedding be integrated.
Steel buoyancy tank casing adopts low temperature resistant Plate Welding to form, and casing offers solid state foam filling access 44；Packing material has characteristic such as ceramic foam material, the polymeric foamed materials etc. such as water absorption is low, compressibility is low, density is little, anti-low temperature, it is possible to provide enough buoyancy for casing.Each anti-ice chunk from floating on certain water surface, then can be integrated around spud leg nesting after connecting by locking device 5 is firm, also can realize split type steel buoyancy tank anti-ice body 4 and swim in the water surface, keep certain drinking water mutually.In addition, owing to each anti-ice chunk is to adopt packing material to provide buoyancy, therefore the seal of steel buoyancy tank do not had rigors, thus reducing the manufacture difficulty of steel buoyancy tank, avoid strictly airtight its watertightness of steel buoyancy tank of similar general need once the phenomenon in destroyed seabed of just sinking occurs, further increase the reliability of split type steel buoyancy tank anti-ice body 4.
Some vibration absorbers 6 are set at the inwall interval of four closed positive back taper steel buoyancy tanks corresponding to spud leg right-angle side and positive back taper steel buoyancy tank 41, before steel float deposing, assemble vertical shock absorption device 6 in advance.Damping element 62 has the characteristics such as corrosion-resistant, low temperature resistant, it is fixed on the vibration reduction support part 61 welded with steel buoyancy tank inwall, being connected to vertical rubber damping pad 63 at damping element 62 outer surface, whole split type steel buoyancy tank anti-ice body 4 relies on the rubber damping pad 63 of positive back taper steel buoyancy tank inwall setting and moves up and down in the sliding friction of spud leg surface.The optional arch of structure etc. of rubber damping pad 63 can bear the shape of more large impact power, in order to reduce the sliding-frictional resistance of rubber blanket, to carry out certain smooth treatment on the spud leg surface contacted with rubber damping pad 63 as adopted impermeable seal to process, smearing the special coating etc. that can reduce outer surface coefficient of friction, also can install on rubber damping pad 63 surface simultaneously and there is low-friction coefficient, low temperature resistant, wear-resisting material such as polytetrafluoroethylmaterial material.The reliability of the present invention will than existing as realized moving up and down with the engagement of spiral gear, to install roller, to realize up and down motion etc. high a lot, and the buoyancy relying solely on self realizes moving up and down, and economy is considerable.This is that owing to gear mesh form is after repeat impact, gear tooth form easily deforms, roller only can single-degree-of-freedom run, and the ball within roller very easily deforms after the shock of floating ice, and reliability is poor.In addition, vibration absorber 6 is owing to being provided with damping element 62 and rubber damping pad 63, being equivalent to be provided with double-layer vibration damping effect, the rubber damping pad 63 of the vibration absorber 6 assembled and spud leg surface gap, between 50mm to 100mm, realize the vibration damping and vibration isolation function of vibration absorber 6 better.
As shown in Figure 7, owing to having passed through steady pin 422 between each anti-ice chunk and be connected with the nesting of fixing guide 412, bolt, ring flange 53 compact siro spinning technology etc. carry out firm locking, the synchronicity that each anti-ice chunk moves is ensure that when moving up and down, the inwall place of each anti-ice chunk offers manhole, it is easy to personnel and enters internal overhaul, and just four point of one circular table steel buoyancy tank 42 inwall is provided with the passage 423 arriving at ring flange 53 connection, facilitate personnel to arrive at and overhaul in the middle part of inwall.
In the upper plane of the just four points of half circular table steel buoyancy tanks 42 of four corresponding to spud leg right angle, it is provided with permanent magnetic chuck effect steel plate 43, itself and steel buoyancy tank are integrated, material is the ferrimagnet such as nickel content of the performances such as tool is low temperature resistant, magnetic conductivity is good nickel steel material between 12% to 13%, flat smooth answered by this effect steel plate, is beneficial to the adsorption of fluid pressure type permanent magnetic chuck.
The hydraulic permanent-magnetic sucker hoisting apparatus 3 of the present invention is made up of components such as plunger case 31, plunger 32, crane arm 33, permanent magnetic chuck 34, turnover oil pipe 35, level sensor 36 and range sensors 37.Permanent magnetic chuck 34 is the nickel steel material adopting and having the characteristics such as ferromagnetism is strong, low temperature resistant.Level sensor 36 is arranged on just four point of one circular table steel buoyancy tank 42 inwall appropriate location, and range sensor 37 is arranged on the correct position of permanent magnetic chuck 34.Its operation principle can refer to Fig. 1 and is illustrated: under common sea ice ice regime, and split type steel buoyancy tank anti-ice body 4 can rely on natural buoyancy effect to move up and down along spud leg, and it is broken by directly bending that certain thickness floating ice clashes into split type steel buoyancy tank anti-ice body 4.Now, level sensor 36 is owing to being fixed on split type steel buoyancy tank anti-ice body 4 inwall, and the waterline position of its sensing is in the scope of setting during normally off.Therefore hydraulic permanent-magnetic sucker hoisting apparatus 3 is also at normally off.
And when ice condition is quite serious, the phenomenons such as ice layer thickness increases, icing rate is accelerated, the secondary quickly icing of the accumulation of trash ice and trash ice likely can make the outer surface of split type steel buoyancy tank anti-ice body 4 be freezed by sea ice, thus adding the displacement of split type steel buoyancy tank anti-ice body 4, its sinking certain position is caused to lose the anti-ice effect that original mobility is good.The now drinking water of split type steel buoyancy tank anti-ice body 4 is significantly increased, and when drinking water value reaches the setting value that water level sensor 36 activates, water level sensor 36 is activated and transmits signal and switchs to the control of hydraulic permanent-magnetic sucker hoisting apparatus.Thus starting hydraulic permanent-magnetic sucker hoisting apparatus 3, its plunger 32 is close straight down, when the distance of the permanent magnetic chuck effect steel plate 43 on permanent magnetic chuck 34 with split type steel buoyancy tank anti-ice body 4 reaches certain value, range sensor 37 is activated and communicates information to permanent magnetic chuck 34 sticking switch, inhale thus permanent magnetic chuck 34 is mutually strong with permanent magnetic chuck effect steel plate 43, range sensor 37 cuts out and communicates information to hydraulic permanent-magnetic sucker hoisting apparatus 3, plunger 32 is lifted up driving crane arm 33 thus promoting split type steel buoyancy tank anti-ice body 4, in lifting process, hydraulic permanent-magnetic sucker hoisting apparatus 3 will provide the vertical to ice sheet to be crushed by ice sheet by split type steel buoyancy tank anti-ice body 4.When split type steel buoyancy tank anti-ice body 4 is promoted to certain altitude, after its drinking water reaches certain value, level sensor 36 is closed, so that hydraulic permanent-magnetic sucker hoisting apparatus 3 cuts out, permanent magnetic chuck 34 discharges, and departs from permanent magnetic chuck effect steel plate 43 action face.Now, the deadweight of split type steel buoyancy tank anti-ice body 4, more than suffered buoyancy, moves downward, and is again vertically crushed by deadweight by ice sheet, finally falls back to equilbrium position so that it is recover original anti-ice mobility.
The above is only the preferred embodiment of the present invention; it is noted that, for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. the steel buoyancy tank ice resistant device being applicable to ice formation, polar region semisubmersible platform, including the fixed platform being fixed on spud leg, it is characterized in that: described fixed platform is installed below some groups of hydraulic permanent-magnetic sucker hoisting apparatus, hydraulic permanent-magnetic sucker hoisting apparatus is connected with the split type steel buoyancy tank anti-ice body of anti-ice, and the side of described split type steel buoyancy tank anti-ice body is wedge shape.
2. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 1, it is characterized in that: described hydraulic permanent-magnetic sucker hoisting apparatus comprises plunger case, plunger, crane arm and permanent magnetic chuck, described plunger case is fixing on the stationary platform, plunger is positioned at plunger case, plunger is connected with crane arm, and crane arm is connected with permanent magnetic chuck.
3. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 2, it is characterised in that: described permanent magnetic chuck is provided with range sensor.
4. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 3, it is characterized in that: described split type steel buoyancy tank anti-ice body comprises alternatively distributed positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling, described positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling are respectively connected with support, and adjacent stent is bolted thus connecting positive back taper steel buoyancy tank and the four point of one circular table steel buoyancy tank that just falling；Permanent magnetic chuck is just being connected with permanent magnetic chuck effect steel plate by described split type steel buoyancy tank anti-ice body.
5. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 4, it is characterized in that: described positive back taper steel buoyancy tank is provided with fixing guide or steady pin, described just falling four point of one circular table steel buoyancy tank be provided with positive back taper steel buoyancy tank with the use of steady pin or fixing guide.
6. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 5, it is characterized in that: described positive back taper steel buoyancy tank comprises the first epicone lid and first time cone lid, first epicone lid and first time cone lid are symmetrical structure, and the cross section of the first epicone lid and first time cone lid is trapezoidal shape；The four point of one circular table steel buoyancy tank that just falling is arc-shaped, and comprising the second epicone lid and second time cone lid, the second epicone lid and second time cone lid is symmetrical structure, and the cross section of the second epicone lid and second time cone lid is trapezoidal shape；The key groove of the first epicone lid and first time cone lid composition is 45 ° to 65 °, and the key groove of the second epicone lid and second time cone lid composition is 45 ° to 65 °.
7. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 6, it is characterised in that: described positive back taper steel buoyancy tank is or/and just falling in four point of one circular table steel buoyancy tank and be provided with level sensor.
8. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 7, it is characterised in that: described first epicone lid and the second epicone lid are equipped with manhole.
9. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 8, it is characterised in that: described positive back taper steel buoyancy tank is or/and just falling in four point of one circular table steel buoyancy tank and be all filled with solid state foam packing material.
10. the steel buoyancy tank ice resistant device suitable in ice formation, polar region semisubmersible platform according to claim 1, it is characterised in that: in described split type steel buoyancy tank anti-ice body, side is provided with several damping devices.
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| CN201610144120.8A CN105756027B (en) | 2016-03-14 | 2016-03-14 | A kind of steel buoyancy tank ice resistant device suitable for polar region ice formation semisubmersible platform |
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