CN116240866A - Anti-icing device for pile leg of self-floating ocean platform - Google Patents
Anti-icing device for pile leg of self-floating ocean platform Download PDFInfo
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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
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Abstract
The invention relates to the technical field of sea ice impact resistance of marine structural members, in particular to a self-floating ocean platform pile leg ice resistance device which comprises an ice resistance cone and a position locking functional part. The ice-resistant cone is sleeved around the pile leg of the ocean platform in a clearance fit mode. The overall density of the ice cone is less than the density of the sea water in the corresponding sea area. The position locking function portion includes an annular airbag and an inflation unit. The annular air bag is sleeved between the ice cone and the ocean platform spud leg. In a specific application, when the tide level changes, the ice-resistant cone freely performs displacement movement along the pile leg of the ocean platform under the action of buoyancy/dead weight, and meanwhile, the annular air bag in a atrophy state follows the displacement. After the relative height position of the ice-resistant cone is preliminarily determined, the inflation unit is started, the annular air bag is inflated by compressed gas until the assembly gap between the ice-resistant cone and the ocean platform spud leg is completely filled, and therefore the ice-resistant cone can be stably held with the ocean platform spud leg.
Description
Technical Field
The invention relates to the technical field of sea ice impact resistance of marine structural members, in particular to a pile leg ice resistance device of a self-floating marine platform.
Background
With the continuous development of the ocean industry in China, the offshore oil exploitation, offshore wind power generation and other ocean engineering are increasingly active, and huge social wealth is produced. However, in the sea areas such as Bohai sea and north high-latitude cold areas in China, sea ice can continuously impact a marine structure conduit under the action of a monsoon in winter, and the continuous ice load and ice vibration seriously influence the safe operation of the marine structure, so that great harm is generated to personnel and economy. The damage forms of the ice bank in front of the structure mainly comprise extrusion, buckling, shearing, bending and the like, and the safe and effective operation of the marine structure is seriously affected. As shown by domestic and foreign scientific researches, the bending strength of sea ice is far smaller than the extrusion strength, the cone structure is additionally arranged near the tide level of the structure, so that the action mode of the sea ice and the cone is changed from extrusion damage to bending damage, the peak ice load acting on the structure can be greatly reduced, and the impact of the ice load on the pile leg of the sea structure is effectively weakened.
At present, in order to reduce the harm of sea ice, the anti-ice cone applied to the jacket of the offshore oil platform is fixed, and the fixed anti-ice cone is mainly arranged on the pile leg of the jacket according to the average value position of the sea level. For example, chinese patent No. CN108118673a discloses an ice breaking device for improving the anti-ice performance of a flexible cone ocean platform structure, and a rib-shaped anti-ice structure is installed on the surface of the original cone pile leg along the vertical direction. The prismatic ice-resistant structure is composed of steel bars with triangular cross sections. The section size of the steel bar is determined according to the diameter of the pile leg of the cone, and the length and the reinforcing position of the steel bar are determined by the waterline position. The steel bars are uniformly welded on the surface of the pile leg of the cone every 20 degrees on the circumference, and 18 common prismatic ice-resistant structures are formed. Although, the technical scheme can effectively avoid the formation of partial continuous ice pressure in the process of the action of the sea ice and the cone structure, and further weaken the adverse effect of the ice load generated by extrusion and crushing on the sea platform structure. However, the cone ice breaking device is fixed on the pile leg, and cannot be changed along with the change of the position of the ice layer on the sea level, and as the position of the sea level ice flow in the tidal range section is changed along with the tide level, the fixed ice-breaking cone is difficult to exert the effects of optimal ice breaking, decomposing and ice-breaking load in most cases, and the fixed ice-breaking cone structure has additional strengthening foundation design, so that the installation is complicated, and the foundation cost is increased.
For this reason, in recent years, universities of major interlocked have newly developed an anti-icing device that can adaptively adjust its own relative height position according to the change of tide level. As described in chinese patent No. CN107150770B, an anti-icing device for a shell leg jack-up ocean platform is disclosed, which comprises an anti-icing cone, at least one gear box fixing plate, and at least one rack with guide rails; the ice-resistant cone is a conical ice-resistant structure arranged at the periphery of the pile leg and is positioned between the lower deck of the platform and the pile shoe; the periphery of the pile leg is provided with a rack with a guide rail along the axial direction; a guide rail embedding region is arranged in one side of the gear box, the gear box is embedded into a guide groove of the guide rail, meanwhile, a gear arranged in the guide rail embedding region is meshed with a rack, and the center of the gear is connected with a gear box shaft; the anti-ice cone controls the relative movement of the gear and the rack through the gear movement control device, so that the up-and-down movement of the anti-ice cone along the pile leg is realized. In practical application, the ice-resistant cone can float up and down along with the change of tide level, so that the cone always has an optimal taper angle for breaking ice, and further the acting force of sea ice on the ice-resistant cone is controlled to be always kept at a minimum state, and the influence of ice load on the acting force of a platform structure is minimized. However, the following problems also exist: 1) The teeth of the rack are very easy to be filled by broken sea ice, so that not only can the rotation resistance of the gear be increased, but also the excessive precision of the matching between the gear and the rack can be caused, and the difficulty of up-and-down displacement of the ice-resistant cone is greatly increased under the combined action; 2) The gear and the rack are extremely easy to generate large-area pitting or local deformation under the influence of broken sea ice, and the service life is greatly shortened; 3) The motor providing driving force for the gear box needs to be tightly sealed inside the ice-resistant cone due to the limitation of application environment, thereby putting higher manufacturing requirements on the ice-resistant cone. The gear rack driving mechanism has the advantages of complex design structure, various and complex parts, extremely inconvenient subsequent installation and maintenance, extremely high requirement on subsequent assembly precision, and extremely poor economy and vast application prospect, and finally the overall manufacturing cost of the anti-icing device is high. Thus, a new research direction is provided for the subject group.
Disclosure of Invention
Therefore, in view of the above-mentioned existing problems and drawbacks, the present invention gathers related data, and through evaluation and consideration of multiple parties, and continuous experiments and modification by the subject team personnel, the self-floating ocean platform spud leg anti-icing device is finally caused to appear.
In order to solve the technical problems, the invention relates to a self-floating ocean platform spud leg ice-resistant device which comprises an ice-resistant cone and a position locking function part. The ice-resistant cone is sleeved around the pile leg of the ocean platform in a clearance fit mode, and is formed by butt joint of a positive cone and a reverse cone. In the process of impacting the ice cone by the sea ice in the high-speed displacement state, the positive cone or/and the reverse cone acts to optimize the displacement direction of the sea ice. The ice cone has a total density less than that of sea water in the corresponding sea area and can float on the sea surface. In practical application, after the height position of the ice-resistant cone is changed due to the influence of the tide level change, the position locking function part is immediately started to lock the relative height position of the ice-resistant cone, and the set time period is maintained. The position locking function portion includes an annular airbag and an inflation unit. The annular air bag is sleeved between the ice-resistant cone and the ocean platform spud leg and synchronously moves along the up-down direction along with the ice-resistant cone. When the locking operation is performed at the relative height position of the ice cream cone, the air charging unit is activated, and as time goes by, the annular air bag undergoes a volume expansion phenomenon due to the influence of an increasing factor of the amount of compressed air charged until the assembly gap between the ice cream cone and the ocean platform spud leg is completely filled. When the unlocking operation is performed at the relative height position of the ice cone, the air charging unit is started again to pump out the compressed air from the annular air bag, and the annular air bag is subjected to the volume shrinkage phenomenon due to the influence of the reduction factor of the amount of the compressed air charged until the annular air bag is out of contact with the ice cone or/and the ocean platform spud leg.
As a further improvement of the disclosed technical scheme, the annular air bag is preferably made of rubber, the ultimate compressive strength is not lower than 0.12MPa, and the pressure drop after one hour of inflation is not more than 3%.
As a further improvement of the technical scheme disclosed by the invention, the inflating unit comprises an inflator pump and a high-pressure pipeline. The inflator pump produces compressed gas during the work process. The high-pressure pipeline is simultaneously communicated with the annular air bag and the inflator pump.
As a further improvement of the technical scheme disclosed by the invention, the inflator pump is fixed on the pile leg of the ocean platform and is positioned right above the ice cone; assuming that the sea level difference between the tide and the tide of the sea area where the ocean platform is located is a, and the distance between the inflator pump and the ice cone is b, b-0.5m is more than a.
Of course, as another modification of the above technical solution, the inflator is fixed to the top wall of the ice cone, and an impact-proof cover is provided around the periphery thereof.
As a further improvement of the disclosed solution, the annular air bag is left in the assembly gap formed between the ice cone and the ocean platform spud leg and remains independent. When the annular air bag is in the atrophy state, the annular air bag can be freely released in an assembly gap between the ice-worthy cone and the ocean platform spud leg.
Of course, as another modification of the above technical solution, the annular air bag is detachably fixed as one body with the ice cone. The annular air bag is subjected to volume expansion to approach the pile leg of the ocean platform due to the influence of the increasing factor of the compressed gas.
As a further improvement of the technical scheme disclosed by the invention, the position locking functional part also comprises an ultrasonic water level detector and a signal output system. The ultrasonic water level detector is used for monitoring the sea level height in real time and is detachably fixed on the top wall of the ice cone. The signal output system is matched with the ultrasonic water level detector to receive the sea level height data, and after data processing, the signal output system immediately sends out a control signal to the inflating unit, and the annular air bag is inflated by compressed gas or is contracted by losing the compressed gas.
As a further improvement of the technical scheme disclosed by the invention, a water sealing cavity is arranged in the front cone or/and the reverse cone, or the front cone or/and the reverse cone is made of high-strength low-density engineering plastics.
In a specific application, the functional exertion process of the self-floating ocean platform pile leg ice-resistant device is executed in the following stages:
1) Since the overall density of the ice cone is less than that of sea water in the corresponding sea area, it can float in sea water. In a specific application, when the sea water tide level changes, the ice-resistant cone sleeved with the ocean platform spud leg freely performs displacement movement along the height direction until the ice-resistant cone keeps positive alignment with the pre-made sea ice, and meanwhile, the annular air bag in a atrophy state synchronously performs following displacement movement. After the relative height position of the ice-resistant cone is preliminarily determined, starting the air charging unit, and enabling the annular air bag to have a volume expansion phenomenon due to the influence of the increasing factor of the compressed gas to be charged until the assembly gap between the ice-resistant cone and the ocean platform spud leg is completely filled, in other words, the ice-resistant cone is stably and reliably held on the ocean platform spud leg under the auxiliary effect of the expanded annular air bag;
2) In a quite long period of time, the anti-icing cone is always kept at a specific height position, and can also be always kept in alignment with the sea ice, and the action mode of the sea ice and the ice cone is converted from extrusion damage to bending damage under the guiding action of the conical surface, so that the damage and damage capability of the sea ice are greatly reduced;
3) The sea water tide level is always in a variable state due to the existence of the tide phenomenon, and the sea water tide level is continuously propelled along with the time, and under the influence of the tide rising and falling, when the alignment relationship between the ice cone and the pre-made sea ice is deteriorated to a certain degree, the inflating unit is started again to pump out the compressed air from the annular air bag, the annular air bag is subjected to the volume shrinkage phenomenon due to the influence of the reduction factor of the amount of the compressed air filled into the annular air bag, and the ice cone is restored to the free state again, namely, the ice cone can directionally perform the rising motion along the pile leg of the ocean platform under the action of the buoyancy/gravity of the sea water, or alternatively, the ice cone can directionally perform the falling motion along the pile leg of the ocean platform under the action of the gravity.
4) Repeating the steps 1-3 until the ice-resistant cone occupies the correct height position relative to the ocean platform spud leg again.
Compared with the traditional design structural form, the self-floating ocean platform spud leg ice-resistant device disclosed by the invention has at least the following beneficial technical effects in practical application:
1) The gap space formed between the ice-resistant cone and the ocean platform spud leg is relatively large, namely the ice-resistant cone is not easy to be filled with broken sea ice, and in addition, under the continuous action of surge force, the non-locking state ice-resistant cone performs small-amplitude reciprocating displacement motion along the height direction, so that even a small amount of broken sea ice is filled in the assembly gap under extreme conditions, the ice-resistant cone can be timely and effectively discharged, and the non-locking state ice-resistant cone can always perform displacement motion freely and with low resistance along the ocean platform spud leg;
2) When the annular air bag is in an expansion state, the inner side wall of the annular air bag is kept in a tight contact state with the ocean platform spud leg, the outer side wall of the annular air bag is kept in a tight contact state with the ice-resisting cone, and the ice-resisting cone is stably and reliably held on the ocean platform spud leg under the combined action of two groups of relative friction forces;
3) Under extreme conditions, even if a very small amount of broken sea ice is reserved in a gap formed between the ice-resistant cone and the ocean platform spud leg, the broken sea ice can be effectively and fully filled in the assembly gap due to the influence of the free shrinkage and expansion characteristics of the annular air bag, and under the condition, the broken sea ice is in a fully-wrapped or semi-wrapped state by the annular air bag, so that the annular air bag is ensured to keep a contact area as large as possible relative to the ice-resistant cone and the ocean platform spud leg, and the ice-resistant cone is further ensured to be more stably and permanently held on the ocean platform spud leg;
4) The self-floating type ice-resistant device has a very simple design structure, contains relatively less parts, is beneficial to realizing manufacture and assembly, has good economy, and is beneficial to large-scale application and popularization in the field of marine structural members.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a first embodiment of a pile leg ice-making apparatus for a self-floating ocean platform according to the present invention (an annular air bag is in a collapsed state).
Fig. 2 is a schematic structural view of a first embodiment of a pile leg ice-making apparatus for a self-floating ocean platform according to the present invention (an annular air bag is in an inflated state).
Fig. 3 is a schematic structural view of a second embodiment of the self-floating ocean platform spud leg ice protection device of the present invention (the annular air bag is in a collapsed state).
Fig. 4 is a schematic structural view of a third embodiment of a pile leg ice-making apparatus for a self-floating ocean platform according to the present invention (the annular air bag is in a collapsed state).
Fig. 5 is a schematic structural view of a fourth embodiment of a pile leg ice protection device for a self-floating ocean platform according to the present invention (with an annular bladder in a collapsed state).
1-an anti-ice cone; 11-a right cone; 111-a first water-tight chamber; 12-reverse taper; 121-a second water-tight chamber; 2-a position locking function section; 21-an annular balloon; 22-an inflation unit; 221-an inflator; 222-high pressure line; 223-impact shield; 224-anti-icing climbing member; 23-an ultrasonic water level detector; 24-a signal output system; 241-data processor.
Detailed Description
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "upper", "lower", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the following, the present invention will be described in further detail with reference to specific examples, and fig. 1 shows a schematic structural diagram of a first embodiment of a self-floating ocean platform leg anti-icing device according to the present invention, where the main structure of the device is an anti-icing cone 1. The ice-resistant cone 1 is sleeved around the pile leg of the ocean platform in a clearance fit mode, and is formed by butting a positive cone 11 and a reverse cone 12 along the height direction. In the process of impacting the ice cone by the sea ice in the high-speed displacement state, the positive cone 11 or/and the reverse cone 12 act to optimize the displacement direction of the sea ice, so that the action mode of the sea ice is changed from extrusion damage to bending damage, the peak ice load acting on the pile leg of the ocean platform can be greatly reduced, and the impact of the ice load on the pile leg of the ocean platform is further effectively weakened.
In order to realize the design purpose that the ice-resistant cone 1 can freely execute lifting displacement motion along the pile leg of the ocean platform under the action of seawater buoyancy/self gravity, so as to ensure that the ice-resistant cone and the pre-made sea ice are always kept in a reasonable alignment state when in effect, the front cone 11 and the back cone 12 are preferably hollow structures, namely a first water sealing cavity 111 and a second water sealing cavity 121 are respectively formed in the two, so that the overall density of the ice-resistant cone 1 is smaller than that of the sea water in the corresponding sea area, and the ice-resistant cone can freely float on the sea surface.
The self-floating ocean platform spud leg ice-proof device is additionally provided with a position locking function part 2. In practical application, after the height position of the ice cone 1 is changed due to the influence of the tide level change, the position locking function part 2 is immediately started to lock the relative height position of the ice cone, and the set time period is maintained.
As is also clearly seen from fig. 1, the position locking function portion 2 is mainly constituted by an annular air bag 21, an inflation unit 22, and the like. The annular air bag 21 is sleeved between the ice-resistant cone 1 and the ocean platform spud leg and is detachably fixed with the ice-resistant cone 1 into a whole. When the annular air bag 21 performs lifting movement along the pile leg of the ocean platform due to the buoyancy/self-gravity of the seawater, the annular air bag 21 follows the synchronous displacement. In order to ensure stable and sufficient performance of the working performance, the annular air bag 21 is preferably made of rubber, and has an ultimate compressive strength of not less than 0.12MPa and a pressure drop of not more than 3% one hour after inflation. In practical use, when the locking operation is performed at the relative height position of the ice bank 1, the air charging unit 22 is activated, and as time goes by, the annular air bag 21 undergoes a volume expansion phenomenon due to the influence of the increased amount of the charged compressed gas until the assembly gap between the ice bank 1 and the ocean platform spud leg is completely filled. When the unlocking operation is performed at the relative height position of the ice bank 1, the air charging unit 22 is again activated to draw out the compressed air from the annular air bag 21, and the annular air bag 21 undergoes a volume atrophy phenomenon due to the influence of the reduced amount of the charged compressed air until it is out of contact with the ice bank 1 or/and the ocean platform spud leg as time goes by.
In a specific application, the functional exertion process of the self-floating ocean platform pile leg ice-resistant device is executed in the following stages:
1) Since the overall density of the ice cone 1 is smaller than that of sea water in the corresponding sea area, it can float in sea water. In a specific application, when the sea level changes, the ice-worthy cone 1 sleeved with the ocean platform spud leg freely performs displacement motion along the height direction until the ice-worthy cone 1 keeps positive alignment with the pre-made sea ice, and at the same time, the annular air bag 21 in a contracted state synchronously performs following displacement motion (as shown in fig. 1). When the relative height position of the ice-worthy cone 1 is preliminarily determined, the inflation unit 22 is started, the annular air bag 21 is subjected to the volume expansion phenomenon due to the influence of the increased amount of the compressed air to be inflated, until the assembly gap between the ice-worthy cone 1 and the ocean platform spud leg is completely filled, in other words, the ice-worthy cone 1 is stably and reliably held on the ocean platform spud leg under the auxiliary effect of the inflated annular air bag 21 (as shown in fig. 2);
2) In a quite long period of time, the anti-icing cone 1 is always kept at a specific height position, and can also be always kept in alignment with the sea ice, and the action mode of the sea ice and the ice cone is converted from extrusion damage to bending damage under the guiding action of the conical surface, so that the damage and damage capability of the sea ice are greatly reduced;
3) The sea water tide level is always in a variable state due to the existence of the tide phenomenon, and the sea water tide level is continuously propelled along with the time, after the alignment relationship between the ice cone 1 and the pre-made sea ice is deteriorated to a certain degree due to the influence of the tide rising and falling factors, the air charging unit 22 is started again to pump out the compressed air from the annular air bag 21, the annular air bag 21 is subjected to the volume shrinkage phenomenon due to the influence of the reduction factors of the amount of the charged compressed air, and the ice cone 1 is restored to a free state, namely, the ice cone 1 can directionally perform the rising motion along the pile leg of the ocean platform under the action of the sea water buoyancy, or alternatively, the ice cone 1 directionally performs the falling motion along the pile leg of the ocean platform under the action of the gravity;
4) Repeating the steps 1-3 until the ice-resistant cone 1 occupies the correct height position relative to the ocean platform spud leg again, so as to ensure that the ice-resistant cone 1 and the pre-made sea ice are always kept in a reasonable alignment state.
Compared with the traditional design structural form, the self-floating ocean platform spud leg ice-resistant device disclosed by the invention has at least the following beneficial technical effects in practical application:
1) The gap space formed between the ice-resistant cone 1 and the ocean platform spud leg is relatively large, namely, the ice-resistant cone is not easy to be filled by broken sea ice, and in addition, under the continuous action of surge force, the non-locking state ice-resistant cone 1 performs small-amplitude reciprocating displacement motion along the height direction, so that even a small amount of broken sea ice is filled in the assembly gap under extreme conditions, the ice-resistant cone 1 can be timely and effectively discharged, and the non-locking state ice-resistant cone 1 can always perform displacement motion freely and with low resistance along the ocean platform spud leg;
2) When the annular air bag 21 is in an expanded state, the inner side wall of the annular air bag is kept in a tight contact state with the ocean platform spud leg, the outer side wall of the annular air bag is kept in a tight contact state with the ice-resisting cone 1, and the ice-resisting cone 1 is stably and reliably held on the ocean platform spud leg under the combined action of two groups of relative friction forces;
3) Under extreme conditions, even if a very small amount of broken sea ice is reserved in the gap formed between the ice-resistant cone 1 and the ocean platform spud leg, the broken sea ice can be effectively and fully filled in the assembly gap due to the influence of the free shrinkage and expansion characteristics of the annular air bag 21, and under the condition that the broken sea ice is in a fully-wrapped or semi-wrapped state by the annular air bag 21, the annular air bag 21 is ensured to keep a contact area as large as possible relative to the ice-resistant cone 1 and the ocean platform spud leg, and further the ice-resistant cone 1 is ensured to be more stably and permanently held on the ocean platform spud leg.
It should be noted that the self-floating ice-resistant device has very simple design structure, contains relatively less parts, is beneficial to realization of manufacture and assembly, has good economy, and is beneficial to large-scale application and popularization in the field of marine structural members.
It is known that the inflator 22 may take various designs to perform the air supply operation to the annular air bag 21 according to the common general knowledge of design, however, a preferred design is recommended here, specifically: as shown in fig. 1 and 2, the inflator 22 includes an inflator 221 and a high pressure line 222. The inflator 221 produces a pressurized gas concomitantly during the work process. The high-pressure pipeline 222 is communicated with the annular air bag 21 and the inflator 221 at the same time. The inflator 221 is detachably fixed to the top wall of the ice bank 1 to follow the ice bank 1 in a synchronous elevating displacement motion. When the inflation operation is performed on the annular air bag 21, the inflator 221 is started up and continuously runs at a high speed, and the outside air enters the inflator 221 through the check valve under the action of the negative pressure and is subjected to the secondary pressurization treatment to be directly supplied into the annular air bag 21, so that the annular air bag 21 is volume-inflated. When the pumping operation is performed on the annular air bag 21, the check valve therein is kept in a normally open state due to the power supply, the compressed air in the annular air bag 21 is rapidly overflowed via the check valve, and the annular air bag 21 is volume-contracted.
In the early experimental stage, the inflator 221 was found to be extremely susceptible to premature failure due to sea ice impact, and in view of this, as a further optimization of the above-described solution, an impact shield 223 is also provided at the periphery of the inflator 221, as shown in fig. 1 and 2. The impact shield 223 is splice welded from angle steel and steel plate and is detachably fixed to the top wall of the ice cone 1 by means of fasteners.
Fig. 3 shows a schematic structural diagram of a second embodiment of the self-floating ocean platform leg anti-icing device according to the present invention, which is different from the first embodiment in that the inflator 221 is directly fixed to the ocean platform leg and located directly above the anti-icing cone 1. Assuming that the sea level difference between the rising tide and the falling tide of the sea area where the ocean platform is located is a and the distance between the inflator 221 and the ice cone 1 is b, b-0.5m is greater than a. In practice, the inflator 221 is always kept in a fixed position, so that not only is the risk of damage caused by direct impact of sea ice eliminated from the source, but also the subsequent maintenance operation is easy to perform. The high pressure line 222 is reserved with a sufficient redundancy so that, when the relative height position of the ice-worthy cone 1 performs the elevating movement due to the tidal effect, the high pressure line 222 is stably, reliably and safely connected to both the annular air bag 21 and the inflator 221.
Fig. 4 shows a schematic structural diagram of a third embodiment of the self-floating ocean platform spud leg ice-preventing device according to the present invention, which is different from the first embodiment in that, in addition to the annular air bag 21 and the air charging unit 22, the position locking function part 2 is additionally provided with an ultrasonic water level detector 23 and a signal output system 24. The ultrasonic water level detector 23 is detachably fixed to the top wall of the ice cream cone 1. The main body of the signal output system 24 is a data processor 241 which is matched with the ultrasonic water level detector 23. The data processor 241 is used to receive sea level height data output via the ultrasonic level detector 23. In practical application, assuming that the initial state is that the ice-resistant cone 1 is stabilized on the pile leg of the ocean platform, the mode that the ultrasonic water level detector 23 positioned at the top of the ice-resistant cone 1 emits ultrasonic signals is used for realizing real-time measurement of sea level height, and whether the real-time height position of the ice-resistant cone 1 meets the practical application requirement can be calculated through simple data conversion. When the sea level height exceeds the design range requirement along with the tide rise and fall after a period of time, the data processor 241 immediately sends out a control signal to the air pump 221, the annular air bag 21 is subjected to volume atrophy due to the loss of compressed air, so that the ice-resistant cone 1 is restored to a free state, the ice-resistant cone 1 can directionally perform ascending movement along the pile leg of the ocean platform under the action of the seawater buoyancy, or the ice-resistant cone 1 can directionally perform descending movement along the pile leg of the ocean platform under the action of the gravity until the ice-resistant cone 1 is kept in positive alignment with the pre-sea ice again, and meanwhile, the annular air bag 21 in the atrophy state synchronously performs following displacement movement. When the relative height position of the ice-worthy cone 1 is preliminarily determined, the air charging unit 22 is started again, and the annular air bag 21 is subjected to the volume expansion phenomenon due to the influence of the increasing factor of the compressed air amount charged until the assembly gap between the ice-worthy cone 1 and the ocean platform spud leg is completely filled, so that the ice-worthy cone 1 is stably and reliably held on the ocean platform spud leg again. The above action process is repeated, so that the anti-icing cone 1 can be ensured to be always kept in a right alignment state with the sea ice of the pre-assault.
Fig. 5 shows a schematic structural diagram of a fourth embodiment of the self-floating ocean platform spud leg ice-resistant device according to the present invention, which is different from the first embodiment in that the front cone 11 and the reverse cone 12 are integrally injection-molded from high-strength low-density engineering plastics, preferably polyethylene plastics, EMA plastics, etc. Therefore, on the premise of ensuring that the anti-ice cone 1 has a good floating function, the manufacturing process route of the anti-cone 1 is effectively shortened, the manufacturing difficulty of the anti-pushing body 1 is reduced, and the forming cost of the anti-ice cone is greatly reduced.
Finally, in either the first embodiment, the second embodiment, the third embodiment, or the fourth embodiment, the annular air bag 21 is directly fixed to the anti-vertebral body 1, and the expected effect is obtained through practical experiments. Of course, as another preferred design of the above technical means, the annular air bag 21 can also be directly left in the assembly gap formed between the ice-worthy cone 1 and the ocean platform spud leg, and kept independent. When the annular bladder 21 is in the collapsed state, it is free to free in the assembly gap between the ice worthy cone 1 and the ocean platform spud leg, and only the buoyancy or gravity of the sea is relied upon subsequently to achieve the following motion relative to the ice worthy cone 1.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The self-floating ocean platform pile leg ice-proof device comprises an ice-proof cone and a position locking function part; the ice-resistant cone is sleeved around the pile leg of the ocean platform in a clearance fit mode and is formed by butt joint of a positive cone and a reverse cone; in the process that the sea ice in a high-speed displacement state impacts the ice-resistant cone, the positive cone or/and the reverse cone act to optimize the displacement direction of the sea ice; the total density of the ice-resistant cone is smaller than that of sea water in the corresponding sea area, and the ice-resistant cone can float on the sea surface; in practical application, after the height position of the ice-resistant cone is changed due to the influence of the change of the tide level, the position locking functional part is started immediately to lock the relative height position of the ice-resistant cone and maintain the set time length, and the ice-resistant cone is characterized in that the position locking functional part comprises an annular air bag and an inflation unit; the annular air bag is sleeved between the ice-resistant cone and the ocean platform spud leg and synchronously displaces along the up-down direction along with the ice-resistant cone; when a locking operation is performed on the relative height position of the ice-worthy cone, the inflation unit is activated, and as time goes by, the annular air bag is subject to a volume expansion phenomenon due to the influence of an increasing factor of the amount of compressed gas to be inflated until the assembly gap between the ice-worthy cone and the ocean platform spud leg is completely filled; when the unlocking operation is performed on the relative height position of the ice-worthy cone, the inflating unit is started again to pump out the compressed air from the annular air bag, and the annular air bag is subjected to the volume shrinkage phenomenon due to the influence of the reduction factor of the amount of the compressed air filled into the annular air bag until the annular air bag is out of contact with the ice-worthy cone or/and the ocean platform spud leg.
2. The self-floating ocean platform spud leg ice protection device of claim 1, wherein the annular air bag is made of rubber, the ultimate compressive strength is not lower than 0.12MPa, and the pressure drop after one hour of inflation is not more than 3%.
3. The self-floating ocean platform spud leg ice-resistant device of claim 1, wherein the inflating unit comprises an inflator pump and a high-pressure pipeline; the inflator pump generates compressed gas in the working process; the high-pressure pipeline is simultaneously communicated with the annular air bag and the inflator pump.
4. The self-floating ocean platform spud leg ice-resistant device of claim 3, wherein the inflator pump is fixed on the ocean platform spud leg and is positioned right above the ice-resistant cone; assuming that the sea level difference between the tide and the tide of the sea area where the ocean platform is located is a, and the distance between the inflator pump and the ice cone is b, b-0.5m is more than a.
5. A self-floating ocean platform spud leg anti-icing device according to claim 3, wherein the inflator pump is fixed on the top wall of the anti-icing cone and is provided with an anti-impact cover at the periphery thereof.
6. The self-floating ocean platform spud leg ice protection device of claim 1, wherein the annular air bag is left in an assembly gap formed between the ice protection cone and the ocean platform spud leg and remains independent; when the annular air bag is in the atrophy state, the annular air bag can be freely released in an assembly gap between the ice-worthy cone and the ocean platform spud leg.
7. The self-floating ocean platform spud leg ice-resistant device of claim 1, wherein the annular air bag is detachably fixed with the ice cone; the annular air bag is subjected to volume expansion to approach the ocean platform spud leg due to the influence of the increasing factor of the compressed gas.
8. The self-floating ocean platform leg ice-resistant device according to any one of claims 1-7, wherein the position locking function part further comprises an ultrasonic water level detector and a signal output system; the ultrasonic water level detector is used for monitoring the sea level height in real time and is detachably fixed on the top wall of the ice cone; the signal output system is matched with the ultrasonic water level detector and used for receiving sea level height data, and immediately sends a control signal to the inflation unit after data processing, and the annular air bag is inflated by compressed gas or is contracted by losing the compressed gas.
9. The self-floating ocean platform spud leg ice-resistant device according to claim 1, wherein a water sealing cavity is arranged inside the positive cone or/and the reverse cone, or the positive cone or/and the reverse cone is made of high-strength low-density engineering plastics.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310441904.7A CN116240866B (en) | 2023-04-23 | 2023-04-23 | Anti-icing device for pile leg of self-floating ocean platform |
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| CN202310441904.7A CN116240866B (en) | 2023-04-23 | 2023-04-23 | Anti-icing device for pile leg of self-floating ocean platform |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130075102A (en) * | 2011-12-27 | 2013-07-05 | 삼성중공업 주식회사 | Ice breaking device and ship including the same |
| CN112177860A (en) * | 2020-10-19 | 2021-01-05 | 中国三峡新能源(集团)股份有限公司 | Flexible anti-ice structure suitable for offshore wind power pile foundation |
| CN114198269A (en) * | 2021-12-20 | 2022-03-18 | 中国石油大学(北京) | Anti-ice damping device of offshore wind turbine |
| CN218844492U (en) * | 2022-10-10 | 2023-04-11 | 江苏海装风电设备有限公司 | Anti-ice structure of offshore wind power foundation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130075102A (en) * | 2011-12-27 | 2013-07-05 | 삼성중공업 주식회사 | Ice breaking device and ship including the same |
| CN112177860A (en) * | 2020-10-19 | 2021-01-05 | 中国三峡新能源(集团)股份有限公司 | Flexible anti-ice structure suitable for offshore wind power pile foundation |
| CN114198269A (en) * | 2021-12-20 | 2022-03-18 | 中国石油大学(北京) | Anti-ice damping device of offshore wind turbine |
| CN218844492U (en) * | 2022-10-10 | 2023-04-11 | 江苏海装风电设备有限公司 | Anti-ice structure of offshore wind power foundation |
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