CN115973357A - Device and method for adaptively adjusting buoyancy of deep-sea floating photovoltaic buoy - Google Patents
Device and method for adaptively adjusting buoyancy of deep-sea floating photovoltaic buoy Download PDFInfo
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- CN115973357A CN115973357A CN202310099645.4A CN202310099645A CN115973357A CN 115973357 A CN115973357 A CN 115973357A CN 202310099645 A CN202310099645 A CN 202310099645A CN 115973357 A CN115973357 A CN 115973357A
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Abstract
The invention provides a device for adaptively adjusting the buoyancy of a deep-sea floating photovoltaic buoy, which comprises: the system comprises a photovoltaic supporting platform, a cylindrical buoy, a self-adaptive telescopic device, a photovoltaic assembly, a mooring rope and a guardrail; the guardrail and the photovoltaic components are fixed on the upper part of the octagonal photovoltaic supporting platform, the cylindrical buoy is installed on the lower part of the supporting platform, the buoy is connected with the middle part of the supporting platform through a self-adaptive expansion device, a mooring rope is tied to the side surface of the buoy, and the self-adaptive expansion device can adjust the buoyancy of the buoy through expansion movement; the invention utilizes the self-adaptive telescopic device to adjust the buoyancy of the buoy, realizes the automatic level stabilization of the photovoltaic supporting platform and the photovoltaic component in the waves, and because the elastic modulus of the spring is large enough and the telescopic lengths of the piston and the piston rod are long enough, the whole floating photovoltaic system can be flatly laid on the sea surface like a carpet in the deep sea water area and is difficult to overturn.
Description
Technology neighborhood
The invention relates to the technical field of floating photovoltaic buoy design, in particular to a device for adaptively adjusting the buoyancy of a deep-sea floating photovoltaic buoy.
Background
Solar energy is used as a clean energy source and is used as a new energy source for large-scale power generation, and a land photovoltaic power generation platform is limited to the terrain and population density, so that the land photovoltaic power generation platform can only be installed in remote plain areas. With the design of floating buildings in various countries, floating photovoltaic power generation platforms begin to appear in inland lakes, reservoirs and other water areas, even near seas and deep sea water areas. China also carries out preliminary design on the deep-sea floating type photovoltaic power generation technology, and the buoyancy of the deep-sea floating type photovoltaic buoy can be changed by sea waves, so that the serious overturning phenomenon of a supporting platform at the upper part of the buoy is caused, and finally the serious safety accident of a system is caused.
Among the relevant technology, chinese patent No. CN114572359B, a connecting device for keeping dynamic stability of a floating photovoltaic structure on water, the technical essential is that the connecting device comprises a floating mechanism, a supporting mechanism and a photovoltaic module, the floating mechanism is fixedly provided with the supporting mechanism, and the supporting mechanism is fixedly provided with the photovoltaic module. The wind and wave combined type inclined strut angle steel has the characteristic of keeping the plane of a system stable, and can effectively resist the capability of uneven plane rotation of the structure, and the effect of uneven plane rotation of the structure system caused by wind and waves can be effectively reduced under the combined action of the inclined strut angle steel and the anchor cable. The disadvantages of the related art are that: the combined action of the inclined strut angle steel and the anchor cable can offset the uneven rotation capacity of wind waves on the floating type photovoltaic platform, and the wave load of the deep sea water area is far larger than that of the offshore area, so that stress concentration is easy to occur at the action positions of the inclined strut angle steel and the anchor cable in the deep sea water area, and finally the whole phenomenon of fracture and overturning is caused.
Therefore, there is a need to provide a device for adaptively adjusting the buoyancy of a deep-sea floating photovoltaic buoy, which solves the above problems.
Disclosure of Invention
The invention aims to provide a device for adaptively adjusting the buoyancy of a deep-sea floating photovoltaic buoy, which realizes the horizontal stability of a photovoltaic module on a floating photovoltaic system by adjusting the buoyancy of the buoy and realizes the draft change of each buoy by utilizing the telescopic motion of a self-adaptive telescopic device at the top of each buoy.
In order to achieve the purpose, the invention provides a device for adaptively adjusting the buoyancy of a deep-sea floating type photovoltaic buoy, which comprises a photovoltaic supporting platform, wherein the photovoltaic supporting platform is octagonal, a cylindrical buoy is respectively arranged at the lower part of each of eight corners of the platform, the photovoltaic supporting platform and the middle part of the cylindrical buoy are fixed through a self-adaptive expansion device, and the buoyancy of the cylindrical buoy is adjusted through automatic expansion and contraction by the self-adaptive expansion device. Still include a plurality of photovoltaic module, mooring rope and guardrail, a plurality of photovoltaic module be fixed in photovoltaic supporting platform upper portion, the all the other blank areas on photovoltaic supporting platform upper portion can regard as the pavement, make things convenient for photovoltaic module's construction and maintenance, platform outside guardrail is used for preventing that construction and maintainer from dropping, whole floating system is fixed through mooring rope who is in every flotation pontoon side. When the waves impact the floating system to a certain degree, the cylindrical buoy which is close to the wave crest firstly can be subjected to a certain lifting force F Z The self-adaptive expansion device performs contraction movement after the buoy is jacked up, increases the draught area of the buoy, and then enters the buoyAnd the buoyancy of the buoy is reduced, and the lift force F of the cylindrical buoy is close to the wave trough Z Can disappear gradually, flotation pontoon buoyancy can reach the minimum when the trough, self-adaptation telescoping device this moment can be because of the reduction of flotation pontoon buoyancy automatically carry out the extension motion to the original state, reduce flotation pontoon draft area, and then increase flotation pontoon buoyancy.
The self-adaptive telescopic device comprises a spring, a top support, a bottom support, a piston cylinder, a piston and a piston rod, wherein the elastic modulus of the spring is large enough, the spring is embedded in the piston cylinder, the outer sides of the piston and the piston rod are fixed in the middle of the top support and the bottom support, the piston cylinder is fixed in the middle of a bowl-shaped structure of the bottom support, the piston and the piston rod have enough depth, and the piston rod are arranged in the piston cylinder and are outwards fixed on the lower part of the top support, so that the self-adaptive telescopic device has long enough telescopic length. When the self-adaptive telescopic device contracts, the piston and the piston rod can compress towards the bottom of the piston cylinder, the spring also compresses due to the compression of the piston and the piston rod at the moment, so that the buoyancy of the buoy is reduced, the wave trough is approached, and the buoyancy F of the buoy is acted Z And the spring, the piston and the piston rod can automatically extend gradually and restore to the original state due to the disappearance of external force, so that the buoyancy of the buoy is increased, and the self-adaptive expansion device can also expand and contract freely up and down normally under the strong wind and waves in deep sea water areas.
The cylindrical buoy adjusts buoyancy through a self-adaptive telescopic device, a certain buoyancy relation needs to be met in the buoyancy adjusting process, and the buoyancy adjusting process of the buoy is represented by a formula F Total ＝∑f a +∑f b Performing a calculation wherein F Total Total buoyancy to achieve horizontal balance for floating photovoltaic systems, f a The buoyancy force born by each pontoon when approaching the wave crest, f b The buoyancy force borne by each buoy when the buoy is close to a wave trough is further deduced as the following relation:
wherein rho is the density of seawaterDegree, g is acceleration of gravity, V a And V b The sum of the drainage volume and the draught volume of each buoy is from wave trough to wave crest and from wave crest to wave trough, k is the elastic modulus of the spring, z a Length of compression for spring to be jacked up by wave, z b Extended length of spring adjacent to wave trough without returning to original state (before movement), z 0 The length of the spring stretched to bring it close to the trough and back to its original state, D and D are the diameters of the piston cylinder and piston rod, respectively, P a And P b The water pressure is compression pressure and tensile pressure when the piston and the piston rod do telescopic motion respectively, G is the total drainage weight of the floating photovoltaic system, and F (t) is the interference of deep sea wind, wave and flow environmental loads.
When the wave trough reaches the wave crest, the spring, the piston and the piston rod are compressed under the interference of the environmental load F (t), and the spring is compressed by a length z a Piston and piston rod due to compression pressure P a Is slowly compressed by the action of the pressure-reducing valve, and the sum V of the water discharge volume and the draught volume of the cylindrical buoy 0 Then gradually decreases to V a If each buoy encounters a wave trough to a wave crest, the buoyancy of the buoy is caused by V 0 And decreased. When the wave crest reaches the wave trough, the spring, the piston and the piston rod are gradually stretched and reset from a compression state under the interference of the environmental load F (t), and the stretched and reset length z of the spring is b The piston and the piston rod are under the tensile pressure P b (P b ＝P a ) Gradually performs stretching reset, and the sum of the drainage volume and the draught volume of the buoy is changed from V in a compressed state a Gradually increase to V b If each buoy encounters a wave crest to a wave trough, the buoyancy of the buoy is caused by V a And increases with an increase. As the buoyancy regulation of the 8 buoys are all operated independently, the sum sigma f of the buoyancy of each buoy from the trough to the wave crest a And the sum sigma f of the buoyancy of each buoy from the wave crest to the wave trough b Combined to the total buoyancy of the floating system. Furthermore, if the spring tension movement is not restored to the original state, the spring tension length z b <z a If the spring performs a stretching movement and returns to the original state, the spring stretches by a length z b ＝z a If, ifThe spring returns to the original state and it is further stretched, the spring stretches a length z b +z 0 ＞z a 。
Self-adaptation telescoping device adjust cylindrical flotation pontoon buoyancy, 8 the flotation pontoon can rise and fall in the wave automatically because of self-adaptation telescoping device's effect, and photovoltaic supporting platform and photovoltaic module will keep the level stability as far as possible, have reduced the probability that photovoltaic supporting platform took place to topple.
The photovoltaic supporting platform and the photovoltaic assembly have small amplitude of heave movement in waves, the mooring rope tied to the side surface of the cylindrical buoy reduces the time for being tensioned, and even if the mooring rope is tensioned under accidental heavy storms, the tension of the mooring rope is smaller than that of the mooring rope under the action of the heavy storms on the traditional floating body under the condition of large mooring tension.
The preparation method of the device for adaptively adjusting the buoyancy of the deep-sea floating photovoltaic buoy comprises the following steps:
step a, gradually jacking up a cylindrical buoy encountering wave crests to enable the photovoltaic supporting platform on the upper portion of the side to be jacked up, and enabling the self-adaptive telescopic device to receive lifting force F from the buoy Z The piston, piston rod and spring are contracted to reduce the buoyancy of the float bowl, and the support platform on the upper part of the float bowl is pulled back to the original position as far as possible.
Step b, after the cylindrical buoy encounters the wave trough, the lifting force F of the wave to the buoy at the moment Z Vanishing gradually, self-adaptive expansion device due to F Z The springs, the pistons and the piston rods are extended to recover the original length, so that the buoyancy of the buoy is increased, and the photovoltaic supporting platform on the upper portion of the side buoy is pulled back to the original position from the sinking position.
And step c, the 8 cylindrical buoys in the deep sea floating type photovoltaic system can automatically fluctuate and ascend in waves due to the action of the self-adaptive expansion device, so that the photovoltaic supporting platform and the photovoltaic assembly can be kept horizontal and stable as far as possible, and the probability of overturning of the photovoltaic supporting platform is reduced.
Compared with the related art, the invention has the following beneficial effects:
(1) The octagonal photovoltaic supporting platform and the photovoltaic modules on the upper portion of the octagonal photovoltaic supporting platform can be flatly paved on the deep sea surface like a carpet by adjusting buoyancy of the floating barrel under the conditions of strong wind and strong waves, and the amplitude of heave motion of the platform and the probability of overturning are reduced;
(2) The self-adaptive telescopic device realizes the up-and-down fluctuation of the buoy along with the waves through the automatic stretching of the piston, the piston rod and the spring in the waves, so that the buoyancy of the buoy is increased and decreased.
(3) The spring has enough large elastic modulus, the piston rod and the piston cylinder form a hydraulic cylinder device, and the self-adaptive telescopic device has enough long telescopic length, so that the self-adaptive telescopic device can work normally in strong wind and strong waves on the deep sea surface.
(4) The self-adaptive expansion device realizes the adjustment of buoyancy of the buoy, can reduce the tension when the mooring cable is tensioned, and further reduces the probability of the breakage of the mooring cable even if the mooring cable is attacked by accidental heavy waves.
Drawings
FIG. 1 is a three-dimensional schematic diagram of a self-adaptive adjustment deep-sea floating photovoltaic buoy buoyancy device of the present invention;
FIG. 2 is a schematic diagram of the adaptive telescopic device and a part of the buoy according to the present invention;
FIG. 3 is a cross-sectional view of the adaptive retractor of the present invention;
the figures are labeled as follows:
1-photovoltaic supporting platform, 2-cylindrical buoy, 3-adaptive telescopic device, 4-photovoltaic module, 5-mooring cable, 6-guardrail, 301-spring, 302-top support, 303-bottom support, 304-piston cylinder, 305-piston and 306-piston rod.
Detailed Description
In order to make the objects, technical solutions, formulas and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in figure 1, the device for adaptively adjusting the buoyancy of the deep-sea floating photovoltaic buoy comprises a photovoltaic supporting platform 1, a cylindrical buoy 2 and an adaptive expansion device 3The photovoltaic assembly 4, mooring rope 5 and guardrail 6, photovoltaic supporting platform 1 are the octagon, and a cylindrical flotation pontoon 2 is respectively installed to eight angle lower parts of platform, and photovoltaic supporting platform 1 and 2 middle parts of cylindrical flotation pontoon are fixed through self-adaptation telescoping device 3, and self-adaptation telescoping device 3 is through the 2 buoyancy of the cylindrical flotation pontoon of automatic telescopic adjustment. A plurality of photovoltaic module 4 are fixed in 1 upper portion of photovoltaic supporting platform, and the all the other blank regions in 1 upper portion of photovoltaic supporting platform can regard as the pavement, makes things convenient for photovoltaic module 4's construction and maintenance, and platform outside guardrail 6 is used for preventing that construction and maintainer from dropping, and whole floating system is fixed through mooring rope 5 who is in 2 sides of every flotation pontoon. When the waves impact the floating system to a certain degree, the cylindrical buoy 2 which is close to the wave crest first can be subjected to a certain lifting force F Z The effect of (3), this side flotation pontoon 2 is because of the buoyancy grow by wave jack-up gradually, and flotation pontoon buoyancy reaches the biggest when the crest reachs, and self-adaptation telescoping device 3 carries out the shrinkage movement after 2 are jack-up of flotation pontoon, increase flotation pontoon draught area, and then reduce 2 buoyancy of flotation pontoon, treat that the wave trough closes on cylindrical 2 lift F of flotation pontoon Z Will disappear gradually, 2 buoyancy of flotation pontoon can reach the minimum when the trough, and self-adaptation telescoping device 3 can be because of the reduction of flotation pontoon buoyancy automatically carry out the extension motion to the original state this moment, reduce 2 draft areas of flotation pontoon, and then increase 2 buoyancy of flotation pontoon.
As shown in fig. 2-3, the adaptive telescopic device 3 includes a spring 301, a top support 302, a bottom support 303, a piston cylinder 304, a piston 305 and a piston rod 306, the spring 301 has a sufficiently large elastic modulus, is embedded in the piston cylinder 304, the piston 305 and the piston rod 306, and is fixed in the middle of the top support 302 and the bottom support 303, the piston cylinder 304 is fixed in the middle of the bowl-shaped structure of the bottom support 303, and has a sufficient depth, and the piston 305 and the piston rod 306 are embedded in the piston cylinder 304 and are fixed outward in the lower portion of the top support 302, and have a sufficiently long telescopic length. When self-adaptation telescoping device 3 carries out the contraction motion, piston 305 and piston rod 306 can compress to the bottom of piston cylinder 304, and spring 301 also carries out the compression motion because of the compression of piston 305 and piston rod 306 this moment, and then has reduced flotation pontoon 2 buoyancy, treats that the wave trough closes on, because of acting on 2 lift F of flotation pontoon Z Gradually disappear, the spring301, the piston 305 and the piston rod 306 will automatically extend and recover to the original shape gradually due to the loss of external force, so as to increase the buoyancy of the buoy 2, and the adaptive expansion device 3 can also expand and contract freely up and down normally under the strong wind and waves in the deep sea water area.
As shown in fig. 2-3, further comprising that the adaptive expansion device 3 adjusts the buoyancy of the cylindrical buoy 2, the buoyancy adjustment needs to satisfy a certain buoyancy relationship, and the buoyancy adjustment process of the buoy 2 is represented by formula F Total ＝∑f a +∑f b Performing a calculation wherein F Total Total buoyancy to achieve horizontal balance for a floating photovoltaic system, f a The buoyancy borne by each pontoon 2 when approaching a wave crest, f b The following relationship is further derived for the buoyancy borne by each buoy 2 when the wave trough is close to:
wherein rho is the density of seawater, g is the acceleration of gravity, V a And V b The sum of the drainage volume and the draught volume of each buoy 2 is respectively from wave trough to wave crest and from wave crest to wave trough, k is the elastic modulus of the spring 301, z is a Length, z, compressed for spring 301 to be lifted by the wave b The stretched length, z, of the spring 301 adjacent to the trough without returning to its original state (before movement) 0 The length of the spring 301 stretched to approach the trough and return to its original state, D and D are the diameters of the piston cylinder 304 and piston rod 306, P a And P b The compression pressure and the tensile pressure when the piston 305 and the piston rod 306 perform telescopic motion respectively, G is the total drainage weight of the floating photovoltaic system, and F (t) is the interference of the deep sea wind, wave and flow environmental load. From trough to crest, spring 301, piston 305 and piston rod 306 compress under the interference of ambient load F (t), spring 301 compressing a length z a While piston 305 and piston rod 306 are at a compression pressure P a Slowly compressed under the action of the pressure, and the sum V of the water discharge volume and the draught volume of the cylindrical buoy 2 0 Gradually decreases to V a If each buoy 2 encounters a wave from a trough to a wave crest, the buoyancy of the buoy 2 is V 0 And decreased. At the peak to trough, the spring 301, the piston 305 and the piston rod 306 are gradually stretched and reset from a compression state under the interference of the environmental load F (t), and the stretching and resetting length z of the spring 301 is set b Piston 305 and piston rod 306 are at a tensile pressure P b (P b ＝P a ) The stretching and resetting are carried out under the action, and the sum of the drainage volume and the draught volume of the buoy 2 is V in a compression state a Gradually increase to V b If each buoy 2 encounters a wave crest to a wave trough, the buoyancy of the buoy 2 is caused by V a The buoyancy of the 8 buoys 2 is adjusted to work independently, so the sum sigma f of the buoyancy of each buoy 2 from the wave trough to the wave crest a And the sum sigma f of the buoyancy of each buoy 2 from the wave crest to the wave trough b To the total buoyancy of the floating system. Further, if the spring 301 does not return to the original state by the stretching movement, the spring 301 stretches by the length z b <z a If the spring 301 performs the stretching movement and returns to the original state, the spring 301 stretches by the length z b ＝z a If the spring 301 is restored to the original state and it is further extended, the spring 301 is extended by a length z b +z 0 ＞z a 。
In this embodiment, the adaptive expansion device 3 automatically expands and contracts through the piston 305, the piston rod 306 and the spring 301 in the waves, so that the buoy 2 fluctuates up and down along with the waves, and the buoyancy of the buoy 2 is increased and decreased. The spring 301 has a sufficiently large elastic modulus, and the piston 305, the piston rod 306 and the piston cylinder 304 are formed like a hydraulic cylinder device having a sufficient telescopic length, so that the adaptive telescopic device 3 can work normally even in the strong winds and waves on the deep sea surface. The buoyancy of the buoy 2 is adjusted by the aid of the adaptive expansion device 3 under the conditions of strong wind and strong waves by the aid of the octagonal photovoltaic supporting platform 1 and the photovoltaic modules 4 on the upper portion of the octagonal photovoltaic supporting platform, the octagonal photovoltaic supporting platform can be flatly paved on the deep sea surface like a carpet, and the amplitude of heave motion of the platform and the probability of overturning are reduced. The self-adaptive expansion device 3 realizes the adjustment of the buoyancy of the buoy 2, and can also reduce the tension when the mooring cable 5 is tensioned, thereby reducing the probability of the occurrence of the breakage of the mooring cable 5 even if the attack of accidental heavy waves is encountered.
A device for adaptively adjusting the buoyancy of a deep-sea floating photovoltaic buoy adjusts the buoyancy as shown in figures 1-3, and comprises the following steps:
step a, gradually jacking up the cylindrical buoy 2 encountering the wave crest firstly, so that the upper photovoltaic supporting platform 1 on the side is jacked up, and the self-adaptive telescopic device receives the lifting force F from the buoy 2 Z In effect, the piston 305, piston rod 306 and spring 301 are retracted to reduce the buoyancy of the side pontoon 2, and the support platform 1 on the upper part of the side pontoon is pulled back to its original position as much as possible.
Step b, after the cylindrical buoy 2 encounters the wave trough, the lifting force F of the wave to the buoy at the moment Z Vanishing gradually, self-adaptive expansion device due to F Z The spring 301, the piston 305 and the piston rod 306 are extended to restore the original length, increasing the buoyancy of the pontoon 2, so that the photovoltaic support platform 1 on the upper part of the side pontoon 2 is pulled back to the original position from the sunken position.
And step c, the 8 cylindrical buoys 2 in the deep sea floating type photovoltaic system can automatically rise and fall in waves due to the action of the self-adaptive expansion device 3, so that the photovoltaic support platform 1 and the photovoltaic assembly 4 can be kept horizontal and stable as far as possible, and the probability of overturning of the photovoltaic support platform 1 is reduced.
The basic principles, principal features, principal formulae and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the foregoing description is only illustrative of the principles and formulations of this invention, and that various changes and modifications can be made therein without departing from the spirit and scope of the invention as claimed.
The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a device of deep sea floating photovoltaic flotation pontoon buoyancy which characterized in that:
the photovoltaic supporting platform comprises a photovoltaic supporting platform (1), wherein the photovoltaic supporting platform (1) is octagonal, a cylindrical buoy (2) is respectively arranged at the lower parts of eight corners of the platform, the middles of the photovoltaic supporting platform (1) and the cylindrical buoy (2) are fixed through a self-adaptive expansion device (3), and the self-adaptive expansion device (3) automatically expands and contracts to adjust the buoyancy of the cylindrical buoy (2);
the floating type solar energy water heater is characterized by further comprising a plurality of photovoltaic modules (4), mooring ropes (5) and guardrails (6), wherein the photovoltaic modules (4) are fixed to the upper portion of the photovoltaic supporting platform (1), the rest blank areas on the upper portion of the photovoltaic supporting platform (1) can be used as walkways, construction and maintenance of the photovoltaic modules (4) are facilitated, the guardrails (6) on the outer side of the platform are used for preventing construction and maintenance personnel from falling off, and the whole floating system is fixed through the mooring ropes (5) tied to the side faces of each floating cylinder (2);
when the waves impact the floating system to a certain degree, the cylindrical buoy (2) which is close to the wave crest firstly can be subjected to a certain lifting force F Z The effect of (2) because of the buoyancy grow and by wave jack-up gradually, the flotation pontoon buoyancy reaches the biggest when the crest arrives, self-adaptation telescoping device (3) carry out the shrinkage movement after flotation pontoon (2) are jack-up, increase flotation pontoon draft area, and then reduce flotation pontoon (2) buoyancy, treat that the wave trough closes on cylindrical flotation pontoon (2) lift F Z Can disappear gradually, flotation pontoon (2) buoyancy can reach the minimum when the trough, this moment self-adaptation telescoping device (3) can be because of the reduction of flotation pontoon buoyancy automatically carry out extension motion to the original state, reduce flotation pontoon (2) draft area, and then increase flotation pontoon (2) buoyancy.
2. The adaptive adjustment deep-sea floating photovoltaic buoy buoyancy device of claim 1, wherein:
the self-adaptive telescopic device (3) comprises a spring (301), a top support (302), a bottom support (303), a piston cylinder (304), a piston (305) and a piston rod (306), wherein the spring (301) has a large enough elastic modulus and is embedded in the piston cylinder (304), the outer sides of the piston (305) and the piston rod (306) are fixed to the middle parts of the top support (302) and the bottom support (303), the piston cylinder (304) is fixed to the middle part of a bowl-shaped structure of the bottom support (303) and has a sufficient depth, and the piston (305) and the piston rod (306) are arranged in the piston cylinder (304) and are outwards fixed to the lower part of the top support (302) and have a long enough telescopic length;
said is fromWhen the adaptive telescopic device (3) contracts, the piston (305) and the piston rod (306) can compress towards the bottom of the piston cylinder (304), and the spring (301) also compresses due to the compression of the piston (305) and the piston rod (306), so that the buoyancy of the buoy (2) is reduced, and when the wave trough is close to, the lifting force F acting on the buoy (2) is generated Z And the spring (301), the piston (305) and the piston rod (306) can automatically extend and restore to the original state gradually due to the disappearance of external force, so that the buoyancy of the buoy (2) is increased, and the self-adaptive telescopic device (3) can also extend and retract up and down freely under the strong wind and waves of a deep sea water area.
3. The adaptive adjustment deep-sea floating photovoltaic buoy buoyancy device of claim 2, characterized in that:
further comprising, the cylindrical buoy (2) adjusts buoyancy through the self-adaptive expansion device (3), a certain buoyancy relation needs to be satisfied in the buoyancy adjusting process, and the buoyancy adjusting process of the buoy (2) is represented by a formula F Total ＝∑f a +∑f b Performing a calculation wherein F Total Total buoyancy to achieve horizontal balance for a floating photovoltaic system, f a Is the buoyancy born by each buoy (2) when approaching the wave crest, f b The following relation is further obtained for the buoyancy force born by each buoy (2) when the buoy is close to the wave trough:
wherein rho is the density of the seawater, g is the acceleration of gravity, and V is a And V b The sum of the water discharge volume and the draught volume of each buoy (2) is respectively from wave trough to wave crest and from wave crest to wave trough, k is the elastic modulus of the spring (301), z is a Length of compression for spring (301) to be wave-jacked, z b The stretched length of the spring (301) adjacent to the trough without returning to its original state (before movement), z 0 The length of the spring (301) stretched to approach the trough and return to its original state, D and D are the diameters of the piston cylinder (304) and piston rod (306), respectively, P a And P b Respectively the compression pressure and the tensile pressure when the piston (305) and the piston rod (306) perform telescopic motion, G is the total drainage weight of the floating photovoltaic system, and F (t) is the interference of wind, wave and stream environmental loads in deep sea;
when the wave trough reaches the wave crest, the spring (301), the piston (305) and the piston rod (306) are compressed under the interference of the environmental load F (t), and the spring (301) is compressed by a length z a And the piston (305) and the piston rod (306) are compressed by the pressure P a Is slowly compressed, and the sum V of the water discharge volume and the draught volume of the cylindrical buoy (2) is 0 Gradually decreases to V a If each buoy (2) encounters a wave trough to a wave crest, the buoyancy of the buoy (2) is caused by V 0 Decreasing and decreasing, when the wave crest reaches the wave trough, the spring (301), the piston (305) and the piston rod (306) are gradually stretched and reset from the compression state under the interference of the environmental load F (t), and the spring (301) is stretched and reset for a length z b The piston (305) and the piston rod (306) are driven by a tensile pressure P b (P b ＝P a ) Gradually performs stretching reset when the sum of the water discharge volume and the draught volume of the buoy (2) is changed from V in a compression state a Gradually increase to V b If each buoy (2) encounters from wave crest to wave trough, the buoyancy of the buoy (2) is caused by V a The buoyancy of 8 buoys (2) is adjusted to work independently, so that the sum sigma f of the buoyancy of each buoy (2) from the trough to the wave crest a And the sum sigma f of the buoyancy of each buoy (2) from the wave crest to the wave trough b The total buoyancy of the floating system is combined;
furthermore, if the stretching movement of the spring (301) is not returned to the original state, the stretching length z of the spring (301) b <z a When the spring (301) performs a stretching movement and returns to its original state, the spring (301) is stretched by a length z b ＝z a If the spring (301) returns to the original state and it is further stretched, the spring (301) is stretched by a length z b +z 0 ＞z a 。
4. The adaptive adjustment deep-sea floating photovoltaic buoy buoyancy device of claim 3, wherein:
self-adaptation telescoping device (3) adjust cylindrical flotation pontoon (2) buoyancy, 8 flotation pontoon (2) can rise and fall in the wave because of the effect of self-adaptation telescoping device (3) is automatic, and photovoltaic supporting platform (1) and photovoltaic module (4) will keep the level stable as far as possible, have reduced the probability that photovoltaic supporting platform (1) took place to topple.
5. The adaptive adjustment deep-sea floating photovoltaic buoy buoyancy device of claim 4, wherein:
the photovoltaic supporting platform (1) and the photovoltaic module (4) have small amplitude of heave motion in waves, the mooring rope (5) tied to the side surface of the cylindrical buoy (2) reduces the time for being tensioned, and even if the mooring rope (5) is tensioned under accidental heavy storms, the tension of the mooring rope is smaller than that of the conventional floating body under the condition that the mooring tension is large.
6. A method for preparing the device for adaptively adjusting the buoyancy of the deep-sea floating photovoltaic buoy as claimed in any one of claims 1 to 5, comprising the following steps:
step a, gradually jacking a cylindrical buoy (2) encountering wave crests firstly, so that the upper photovoltaic supporting platform (1) on the side is jacked up, and receiving the lifting force F from the buoy (2) by the self-adaptive telescopic device Z The piston (305), the piston rod (306) and the spring (301) are contracted to reduce the buoyancy of the buoy, and the supporting platform (1) at the upper part of the side buoy (2) is pulled back to the original position as much as possible;
step b, after the cylindrical buoy (2) encounters the wave trough, the lifting force F of the wave to the buoy at the moment Z Vanishing gradually, self-adaptive expansion device due to F Z The spring (301), the piston (305) and the piston rod (306) are extended to restore the original length, so that the buoyancy of the buoy (2) is increased, and the photovoltaic support platform (1) on the upper part of the side buoy (2) is pulled back to the original position from the sinking position;
and c, the 8 cylindrical buoys (2) in the deep-sea floating photovoltaic system can automatically fluctuate and ascend in waves due to the action of the self-adaptive expansion device (3), so that the photovoltaic supporting platform (1) and the photovoltaic assembly (4) can be kept horizontal and stable as far as possible, and the probability of overturning of the photovoltaic supporting platform (1) is reduced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310099645.4A CN115973357A (en) | 2023-02-10 | 2023-02-10 | Device and method for adaptively adjusting buoyancy of deep-sea floating photovoltaic buoy |
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| CN202310099645.4A CN115973357A (en) | 2023-02-10 | 2023-02-10 | Device and method for adaptively adjusting buoyancy of deep-sea floating photovoltaic buoy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116477005A (en) * | 2023-06-21 | 2023-07-25 | 上海海事大学 | Annular stretching integral type offshore photovoltaic power generation platform and installation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116477005A (en) * | 2023-06-21 | 2023-07-25 | 上海海事大学 | Annular stretching integral type offshore photovoltaic power generation platform and installation method |
| CN116477005B (en) * | 2023-06-21 | 2023-08-18 | 上海海事大学 | Annular stretching integral type offshore photovoltaic power generation platform and installation method |
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