CN110805532B - Ultra-large horizontal axis wind driven generator adopting inflatable pressure-maintaining enhanced tower barrel - Google Patents

Ultra-large horizontal axis wind driven generator adopting inflatable pressure-maintaining enhanced tower barrel Download PDF

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CN110805532B
CN110805532B CN201911166558.6A CN201911166558A CN110805532B CN 110805532 B CN110805532 B CN 110805532B CN 201911166558 A CN201911166558 A CN 201911166558A CN 110805532 B CN110805532 B CN 110805532B
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朱杰
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/30—Wind power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

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  • Sustainable Development (AREA)
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Abstract

The invention discloses an ultra-large horizontal axis wind driven generator adopting an inflatable pressure maintaining enhanced tower barrel, wherein the tower barrel is in a circular straight barrel shape and a frustum shape, and is connected by adopting segmented external flanges, the joint is sealed, the top of the tower is provided with a seal head, the bottom of the tower is provided with an air sealing layer, the inner cavity of the tower forms an airtight closed cavity, gas is injected and pressure is maintained, and the pressure P in the airtight inner cavity is as follows:
Figure DDA0002287612130000011
and an inclined support piece is arranged between the lower part of the cylindrical tower barrel and the foundation, so that the stress condition is improved, and the comprehensive performance is greatly improved: rigidity, pressure air damping vibration attenuation, bear top of the tower gravity, anti-instability rupture, toppling, anti-typhoon hurricane and expansion offshore wind power, the cost performance is greatly improved, the tower can be made higher and bigger, the generated energy is obviously improved, the method is particularly suitable for establishing standardization, serialization and modularized domestic and international standards, the complicated design of the tower can be changed into a model selection design, and the method is very efficient and simple.

Description

Ultra-large horizontal axis wind driven generator adopting inflatable pressure-maintaining enhanced tower barrel
Technical Field
The invention relates to a large horizontal axis wind driven generator, in particular to a modular tower drum enhanced ultra-large horizontal axis wind driven generator, which is applied to the technical field of wind driven generators.
Background
The wind driven generator is a clean renewable energy source which is greatly developed worldwide, the wind driven generator becomes a new energy source which is developed and utilized in a large scale in the 21 st century, the global wind energy resource is very rich, the wind power generation is rapidly developed under the support and encouragement of policies of various countries, and at present, China becomes a country with the largest wind power installed capacity in the world.
The wind speed at a high position is generally higher than that at a low position, and the wind energy is in direct proportion to the square of the wind speed, so that a higher tower can enable a unit wind sweeping area of a wind wheel to obtain more wind energy, and researches indicate that the annual generating capacity of the wind driven generator can be increased by 0.5-1% when the tower is increased by 1 meter under the common condition, and the annual generating capacity of the wind driven generator can be increased by 0.5-1 time when the tower is increased by 100 meters. The larger the wind sweeping area of the wind wheel is, the more the wind energy is obtained, and the wind sweeping area of the wind wheel is in direct proportion to the square of the length of the blades of the wind wheel, so that if the length of the blades is increased by 1 time, the wind sweeping area of the wind wheel is 4 times of the original wind energy, and the obtained wind energy is 4 times of the original wind energy. And if the tower barrel is lifted by 100 meters, the blades are lengthened by 1 time, and the comprehensive effect of the two is 6-8 times. The generated energy is 6 to 8 times of the original generated energy, the benefit is considerable, and the method is the most main effective path for greatly reducing the power consumption cost and improving the competitiveness of wind power.
For the reasons, the development trend of world wind power including terrestrial wind power and offshore wind power is that wind power equipment is ultra-large, a tower is higher and larger, blades are longer, and single machine capacity is larger, in recent years, the height of a steel tower of a wind driven generator is continuously increased, the length of the blade is 60 meters, 70 meters and 83 meters from 120 meters and 140 meters to the current maximum 166 meters, the single machine capacity is 4mw and 6mw to 8mw, the latest report is reported in 2019 in 10 months, the worldwide maximum Haliade _ x12mw offshore wind driven generator is offline and installed on site, the wind driven generator has the longest blade in the world of 107 meters, the world maximum single machine capacity is 12mw, the tower is 135 meters, the weight of a single cabin reaches 700 tons, and a permanent magnet direct drive motor is adopted.
Reports on the United states research institute are working on 500 m tall towers, 200 m long blades and ultra large megamachines with a single machine capacity of 50 mw. China mostly introduces foreign wind power technology, and can produce a tower drum 155 m high, blades 80 m long and a wind driven generator with single machine capacity of 8 mw.
At present, in the ultra-large development process of wind power equipment in the world, at least the following bottleneck problems are met and need to be solved:
the bottleneck problem that the manufacturing cost of the ultra-large tower barrel rises sharply is pointed out by related research, the manufacturing difficulty of the tower barrel is increased greatly when the height of the tower barrel is increased, the manufacturing cost of the tower barrel rises exponentially along with the increase of the height of the tower barrel, the benefit of the increase of the generated energy caused by the increase of the height of the tower barrel is increased quickly, and the manufacturing cost which rises sharply reaches a balance point, the tower barrel in the prior art is fully excavated and developed in recent years, and the height of the steel tower barrel is not broken through by 180 meters so far, so that the method can: the tower height of 180 meters is roughly a profit-loss balance point for the construction of towers of the prior art, i.e., the prior art, while fully capable of constructing towers that exceed 180 meters in height, is not economically cost-effective.
The wind power generator comprises a wind wheel, the ultra-large size of the top of the tower of the equipment in the engine room and the engine room can cause the gravity load of the head to be greatly increased, and also can cause the bottleneck problem of the severe increase of the manufacturing cost of the tower barrel.
The bottleneck problem of the tower barrel in the prior art for resisting the ultra-strong typhoon and hurricane is that the tower barrel in the prior art is equivalent to a slender rod piece with a hollow thin-wall length-diameter ratio of 13-20, under the attack of the ultra-strong typhoon and hurricane, the distance of a tower top head deviating from the center is too large, the bending moment of the tower barrel formed by multiplying the eccentric distance by the weight load of the tower head is too large, in addition, the thin-wall rigidity of the tower barrel is not enough, the tower barrel is easy to be unstable, the tower barrel is broken and collapsed, the whole tower barrel is pulled up due to insufficient base strength of the tower barrel, the accidents of breaking, collapsing and repeating of the tower barrel of the wind driven generator at home and abroad in each year are mostly reported, according to incomplete statistics, the 6 accidents of tower falling of the wind driven generator in 2019 are happened all over the world, wherein 1 in Gansu province in China, 3 in America and 2 in Brazil, and the accidents, and the post-treatment cost of a large number of accidents needs to be borne, and the accidents can greatly contort and obstruct the development of wind power, so that the difficult problem of resisting ultra-strong typhoons and hurricanes of the wind driven generator needs to be technically solved, and the accidents are avoided and eradicated to the utmost extent.
The problems of vibration, resonance and vibration reduction of the tower barrel are also one of the technical problems to be solved.
The current super-large scale of the tower of the wind driven generator obviously lags behind the problem of super-large scale of the blade, generally speaking, the longer the blade, the larger the wind wheel and the higher the tower arranged, and the largest wind driven generator Haliade __ x12mw in the world manufactured in the past year has a blade with a length of 107 meters, which is equivalent to that the wind wheel with a diameter of 220 meters is only provided with a tower with a height of 135 meters, obviously, the blade is not matched, and the tower with a length of 180 meters to 220 meters should be more suitable to be arranged, so that the effects of the two can be fully exerted, and the power generation capacity is further improved.
The invention patent with the prior art patent application number of CN20121033343.9 discloses an air compressor solar heat collection and energy storage power generation system utilizing wind power plant towers, which is manufactured in a segmented mode, the segmented towers are connected through flanges, the towers are made into sealed containers, the problem of compressed air energy storage is solved, pressure in an inner cavity is not maintained, the pressure can be changed from 0 MPa to 5MPa, and compressed air energy storage is achieved. The problems of ultra-strong typhoon and hurricane resistance of the tower drum and vibration, resonance and vibration reduction of the tower drum cannot be solved. The patent application number is CN20122048859.2 patent of the invention discloses a plateau wind generating set tower, which comprises a plurality of sections of tower barrels combined through flanges, the flange joint parts between the sections of tower barrels are sealed by sealant to ensure the integral sealing of the plateau wind generating set tower, the atmospheric pressure inside the tower is kept above 82kpa by adopting the pressurization of a pneumatic pump, the tower is provided with two sealing doors, and personnel can enter the tower for operation through the sealing doors, so that the technical problems that the normal and reliable operation of wind generating set electrical equipment can be influenced and the plateau reaction is easy to generate when the maintenance personnel maintain the tower are solved, when the altitude is 0 meter, the atmospheric pressure is 101kpa, and when the altitude is 4000 meters, the atmospheric pressure is 54 kpa. The plateau wind generating set pylon adopts a subsection tower section of thick bamboo flange joint, and flange joint department adopts sealing technique to make whole tower section of thick bamboo inner chamber become airtight inner chamber, aerifys the pressurize to the section of thick bamboo, can solve the plateau low-pressure to the security reliability influence of electrical equipment operation and maintainer's breathing safety problem. The plateau wind generating set tower adopts a flange joint part to be sealed by sealant, and a pneumatic pump is used for inflating, wherein the pressure maintaining is not less than 82kpa, namely between 82kpa and 101kpa, and is not higher than 1 standard atmospheric pressure. The plateau wind generating set tower is suitable for high-altitude areas.
In conclusion, how to follow the trend of world wind power development in ultra-large scale, the law that the manufacturing cost of wind power equipment in ultra-large scale rises exponentially is broken through technical improvement, the comprehensive performance of the equipment is greatly improved by increasing less cost, and the bottleneck problem is solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art, and provides the ultra-large horizontal axis wind driven generator adopting the inflatable pressure-maintaining reinforced tower barrel, so that the integral stress condition of the tower barrel is improved, the comprehensive performance is greatly improved, particularly the integral mechanical property of the tower barrel is improved, the rigidity, the pressure air damping vibration reduction, the tower top gravity bearing capacity, the instability fracture resistance, the overturn resistance and the typhoon and hurricane resistance of the tower barrel are obviously improved, the offshore wind power application range is expanded, the cost performance of the ultra-large horizontal axis wind driven generator is greatly improved, the tower barrel can be higher and larger, and the generated energy is exponentially improved. The cylindrical tower drum is particularly suitable for establishing national and international standards of standardization, serialization and modularization, can change the complicated design of the tower drum into a model selection design, and is very efficient, simple and convenient.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ultra-large horizontal axis wind turbine adopting an inflatable pressure-maintaining reinforced tower barrel comprises a ground foundation, an integral tower barrel, a machine head device, a pedestrian suspension cage device and an auxiliary device, wherein the bottom of the integral tower barrel is arranged on the ground foundation in a sitting mode, an inner flange and an outer flange are arranged at the lower end of a tower bottom section of the integral tower barrel and fixedly connected with the ground foundation through foundation bolts, reinforcing rib plates are arranged between the flanges at two sides of each foundation bolt and a barrel wall, the machine head device comprises a cabin, a main shaft, a hub and blades, the upper end of a tower top section of the integral tower barrel is matched with a supporting bearing, the supporting bearing is connected with the cabin flange, the main shaft is arranged on the cabin, the hub is arranged on the main shaft, the blades are arranged on the hub, the integral tower barrel; the connecting flange of the segmented tower cylinder adopts an outer flange, and the integral tower cylinder is mainly formed by connecting and installing a tower bottom section, a tower body section, a tower top head sealing section and a tower top section from bottom to top; the tower bottom section, the tower body section and the tower top head sealing section form a closed inflation pressure maintaining container through flanges, the bottom of the inflation pressure maintaining container is directly installed on the ground foundation, a sealing structure is adopted at a flange joint to form a sectional tower outer flange joint sealing device, so that the local section of the inner cavity of the whole tower barrel becomes an airtight inner cavity, a proper gas medium is injected into the airtight inner cavity, and pressure maintaining is carried out, wherein the pressure P in the airtight inner cavity is as follows:
Figure GDA0002738804080000041
in the formula, G is the total weight of the machine head device, and S is the cross-sectional area of the airtight inner cavity;
the tower top sealing head section adopts a two-connection special-shaped flange, and a flange connecting part is formed on the lower surface or the upper surface of an outer lateral boss of the sealing head part of the pressure container; the ground foundation inside the tower bottom section is provided with an air sealing layer; an overhaul platform is arranged below each section of tower tube sealing structure in the tower, a movable pedestrian ladder is arranged between adjacent overhaul platforms, an overhaul manhole is arranged at the bottom of the tower tube, a vent pipe and an electric valve are arranged on a sealing head of a tower top sealing head section, a door opening is arranged on the tower top section, a door opening platform is arranged outside the door opening, a pedestrian cage device is arranged outside the tower from the bottom of the tower to the top of the tower, a safety valve, a pressure gauge and a flammable and explosive gas detector, an inflation pipe and an inflation valve are arranged on the tower body, and an exhaust pipe and an exhaust valve are connected to an inflation pipeline between the inflation valve and the tower tube; the combined cable is laid at the cable channel opening of the tower top section.
As the preferred technical scheme of the invention, the tower body section is assembled by at least 2 segmented towers respectively, and the diameter of the inner cavity of each tower is 6-12 meters.
As the preferable technical scheme of the invention, the pressure P in the airtight inner cavity is 0.16-0.7 MPa; the gas filled in the airtight inner cavity formed at the partial section of the inner cavity of the whole tower cylinder is nitrogen or clean air, and when the air compressor is used for inflating, the air compressor is an oil-free lubrication air compressor.
As a preferred technical scheme of the invention, the integral tower barrel is of a circular-straight barrel-shaped structure and comprises a circular-straight barrel-shaped tower bottom section, a circular-straight barrel-shaped supporting seat section, a circular-straight barrel-shaped tower body section, a circular-straight barrel-shaped tower top sealing section and a circular-straight barrel-shaped tower top section, wherein the circular-straight barrel-shaped supporting seat section is arranged between the circular-straight barrel-shaped tower bottom section and the circular-straight barrel-shaped tower body section, at least 3 inclined supporting pieces are symmetrically and uniformly distributed around the periphery of the outer wall of the circular-straight barrel-shaped tower barrel between the lower part of the circular-straight barrel-shaped tower barrel and a foundation, the central lines of the inclined supporting pieces and the axial line of the tower barrel form an included angle of not less than 30 degrees, flanges are arranged at two ends of the inclined supporting pieces, one end of each inclined supporting piece is. Preferably, the cylindrical tower body section (30) is formed by assembling at least 2 cylindrical segmented towers with the same structure, size and material, and the diameter of the inner cavity of each tower is 6-12 m.
As a preferred technical scheme of the invention, the integral tower barrel is of a frustum-shaped structure and consists of a frustum-shaped tower bottom section, a frustum-shaped tower body section, a frustum-shaped tower top sealing head section and a frustum-shaped tower top section.
As a preferred technical scheme of the invention, two connecting outer flanges are adopted between the segmented tower cylinders as connecting seams to set an air-tight structure, the two connecting outer flanges are connected by bolts and nuts, the inner rings of the two connecting outer flanges take the connecting seams as symmetrical centers, an annular dovetail groove with a dovetail-shaped cross section is processed, a dovetail-shaped elastic sealing ring is embedded in the dovetail groove, and sealant is continuously poured along the two sides of the sealing ring and the joints of the dovetail groove to form two continuous and tight sealing rubber rings.
As a preferred technical scheme of the invention, after a body of the head sealing section flange extends towards an inner ring, the body extends towards the opposite side flange to form a tubular convex pipe, the outer diameter of the convex pipe is smaller than the inner diameter of the opposite side flange, a gap of no more than 10mm is left between the outer diameter of the convex pipe and the inner diameter of the opposite side flange on one side, the wall thickness of the convex pipe is equivalent to that of the end socket, a connecting structure of the two-connection special-shaped flange is formed, the end socket of the pressure container is integrally connected with the convex pipe on the two-connection special-shaped flange in a butt welding mode, and.
As a preferred technical scheme of the invention, the pedestrian cage device comprises a winch, a hoisting steel wire rope, a head sheave bracket, a cage, guide rail sliding shoes, T-shaped guide rails, a guide rail bracket and a cage platform, wherein the top of the tower top section is welded with two symmetrically arranged head sheave brackets, a head sheave bearing seat is arranged on a horizontal beam of the two head sheave brackets, the winch is arranged on a ground foundation below the cage platform, the cage is parked on the cage platform, the hoisting steel wire rope is vertically led up and around the head sheave from a winding drum of the winch and then led down to be connected with a hanging point of the cage, the guide rail brackets are welded on the outer wall of a tower cylinder according to the spacing distance of 1.5 meters along the height direction between the cage platform and the head sheave, the T-shaped guide rails are arranged on the guide rail brackets, one guide rail sliding shoe is respectively arranged on and under the two sides of a cage body, and the groove of the guide rail sliding shoes are clamped into the T-shaped guide rails during installation, a sliding fit mechanism is formed, the winch is started to pull the cage to lift up and down, a door opening platform is welded on the cylinder wall, and workers can reach the cage platform through the escalator, rise to the door opening platform by taking the cage, enter the door opening, enter the tower barrel cavity of the tower top section and then enter the engine room.
As a preferred technical scheme of the invention, a combined cable support is welded on the outer wall of the tower from the bottom of the tower to the top section of the tower along the tower body, and a distance of 1.5 meters is reserved along the cable, when laying, a plurality of cables are laid along the combined cable support side by side, and are fixedly arranged on the combined cable support by a cable clamp, are led to the top section of the tower, penetrate through a cable passage port, enter the tower of the top section of the tower, and then enter a cabin to be electrically connected with electric equipment of the cabin.
According to the preferable technical scheme, the reinforcement is additionally tied on the ground in the cylinder for secondary concrete pouring, the thickness is not less than 600 mm, the foundation bolts in the cylinder are completely covered to form an airtight structure of a secondary poured concrete surface layer, and then pressure-resistant floor paint with the thickness not less than 10mm is arranged on the secondary poured concrete surface layer.
Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:
1. the inflatable pressure-maintaining tower barrel of the ultra-large horizontal shaft wind driven generator greatly improves the capability of the tower barrel for bearing the gravity load of the tower top machine head, and by 10 months in 2019, the maximum single machine capacity of the wind driven generator in the world is 12mw, the total weight of the machine head is about 900 tons, and with the continuous rising of the single machine capacity, machine types of 15mw, 20mw and larger can appear in the near future, and the gravity load of the tower top machine head can also rise to 2000 tons or even higher than 1000 tons;
2. the inflatable pressure-maintaining tower cylinder greatly improves the rigidity of the tower cylinder, the internal pressure gas of the tower cylinder can greatly improve the rigidity of the tower body, and the anti-breaking capacity of the tower cylinder is greatly improved;
3. the gas under pressure in the cylinder can play a role in damping vibration attenuation on the vibration of the tower body, can quickly attenuate the vibration amplitude of the tower body, and improves the fatigue strength resistance of the tower cylinder;
4. the invention greatly improves the capability of the tower barrel in resisting unstable fracture and reversion, the tower barrel fracture and reversion and the connection root reversion are two main accidents of the tower barrel, wind resistance generates toppling bending moment on the tower body on one hand, on the other hand, the tower top head can deflect and deviate from the axial center of the tower barrel under the action of the wind resistance, the distance of the deviation center is multiplied by the gravity load of the head to generate toppling bending moment on the tower body, the two bending moments are superposed simultaneously in the same direction, and the bearing capability of the tower body strength is exceeded under the attack of super typhoon hurricane, the tower body can be suddenly unstable and fractured or the connection root reversion, the invention is an inflatable pressure-maintaining tower barrel, the rigidity of the tower body is greatly improved under the action of gas pressure, the distance of the tower top head deviating from the center under the action of the wind resistance is greatly reduced, and most or all of the gravity load of the tower top head is transmitted to the inner ground foundation of the barrel through the gas with the internal pressure, so that the eccentric distance of the head, therefore, the superposition effect of the two bending moments is greatly reduced, and the tower barrel can greatly improve the capability of resisting instability, fracture and overturn under the attack of typhoons and hurricanes;
5. at least 3 inclined supporting pieces symmetrically and uniformly distributed along the periphery of the cylinder wall are additionally arranged between the outer wall of the lower part of the cylindrical tower barrel and a ground foundation, so that the continuous root tilting resistance of the cylindrical tower barrel is greatly improved when the cylindrical tower barrel is attacked by ultra-strong typhoon and hurricane;
6. the invention can greatly improve the survival wind speed of the tower cylinder, the rigidity of the tower body is improved, the instability breaking resistance is improved, and the root connection tilting resistance is improved, so that the survival wind speed of the tower cylinder can be improved to more than 90 meters per second from the existing designed survival wind speed of 70 meters per second;
7. the device has obvious cost performance advantage, greatly improves the ratio of the comprehensive performance improvement to the increased cost of the large-scale wind driven generator, breaks through the rule that the manufacturing cost of the tower barrel increases in exponential proportion along with the increase of the height of the tower barrel to a certain extent, can effectively break through the high limit of 180 meters of the profit and loss balance point of the tower barrel in the prior art, and is expected to improve the high limit to 300 meters; the increase of the height of the tower barrel can improve the annual energy production of the wind driven generator by 0.5-1 time, and the tower barrel height limit of the invention is 120 meters more than that of the existing tower barrel, so that the annual energy production can be improved by 0.5-1 percent when the tower barrel is increased by 1 meter, thereby realizing higher economic benefit;
8. the tower cylinder can prolong the service life, on one hand, the anti-fatigue capacity of the tower cylinder can be improved by the damping and vibration damping effect of the inflatable pressure-maintaining tower cylinder, and the service life is prolonged, on the other hand, due to the change of the stress condition, the structural requirement that the thickness of the original tower cylinder is thin at the top and thick at the bottom is balanced at present, and the thickness can be required to be consistent, so that the weak link caused by the influence of corrosion on the thin wall can be eliminated, and the service life of the tower cylinder is prolonged;
9. the invention is particularly suitable for offshore floating wind driven generators, when the offshore floating wind driven generator is attacked by super strong wind waves, the tower barrel swings, particularly, the eccentric distance of the swinging of the machine head deviating from a vertical line is far larger than that of a fixed tower barrel, at the moment, the tower barrel is influenced by wind resistance bending moment and the bending moment generated by multiplying the gravity load of the machine head at the top of the tower by the eccentric distance, the influence peak value of double superposition is very large, and the requirements on the rigidity and the instability resistance of the tower barrel are higher; the inflatable pressure-maintaining tower cylinder just meets the comprehensive requirement, so the inflatable pressure-maintaining tower cylinder is particularly suitable for being used as a tower cylinder of an offshore floating type wind driven generator;
10. in the prior art, the frustum-shaped tower barrel is manufactured in sections and transported in sections, and a road can reach an installation region;
11. the ultra-large wind driven generator is suitable for offshore wind power development, the diameter of the tower barrel of the ultra-large wind driven generator is large, can be from 8 meters to more than ten meters, is limited by the passing conditions of a transportation road, is greatly limited by regions when being installed on land, is not limited by transportation conditions when being installed on the sea, and can be developed vigorously;
12. the circular straight cylindrical tower drum is particularly suitable for standardized, modularized and serialized production and manufacturing, the technical parameters of the frustum-shaped tower drum of the wind driven generator in the prior art are eight-door, even if the tower drum of the wind driven generator with the same installed capacity level has large difference in height of a tower body, diameter of the tower drum and thickness of the drum wall, and manufacturers have respective design standards; according to the circular-straight-barrel-shaped tower barrel, the tower body has the same diameter from top to bottom, if the strength design concept of the prior art is adopted, the barrel wall of the tower bottom is thick, the barrel wall of the tower top is thin, and the wall thickness of the tower body is in a transition state from thick to thin from bottom to top, the circular-straight-barrel-shaped tower barrel is an inflatable pressure-maintaining tower barrel, on one hand, the acting force of gas pressure on the barrel wall is the same, the thickness of the barrel wall is required to be consistent, on the other hand, most or all of the gravity load of a head of the tower top is transmitted to the ground foundation in the; by combining the stress effects of the two aspects, the wall thickness of the circular straight cylindrical tower barrel can be the same from top to bottom, so that after the segmented tower barrel is manufactured in a segmented mode, the functions of the segmented tower barrel can be divided into 5 types, and the steps from the tower bottom to the tower top are as follows: the invention can amplify the diameter of a round and straight cylindrical tower barrel into a series of standards according to a certain interval in turn, for example, according to the diameter of the tower barrel: the tower barrels in the same diameter standard are not only modularized, but also universal and standardized, and the sizes, the structures and the materials of the similar segmented tower barrels of other 4 types of segmented tower barrels are the same, so that a unified tower barrel manufacturing standard can be formed;
13. the modular, standardized and serialized structure of the round and straight cylindrical tower barrel changes the complicated design work of the wind driven generator tower barrel in different regions and different wind conditions into simple and convenient work of model selection and module adjustment according to series standards, and brings great convenience to the design of the tower barrel; the diameter of the tower barrel is selected from diameter series standards according to installed capacity and the gravity load of the machine head, the height of the tower barrel is selected according to the wind condition of an installation place and the maximum wind speed in 50 years, and the model selection design requirement is easily met through module adjustment, so that the method is efficient and convenient;
14. the standardized, serialized and modularized characteristics of the cylindrical tower drum are particularly suitable for specialized, large-scale, standardized and serialized production and manufacturing of organizations, and the manufacturing cost is further reduced.
Drawings
Fig. 1 is a schematic structural diagram of an ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining enhanced circular-straight cylindrical tower according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the upper portion of the tower top section according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of a dovetail seal at the joint of the outer flanges of the segmented tower according to the first embodiment of the invention.
Fig. 4 is a cross-sectional view of a connection of two-connection special-shaped flange seal heads according to a first embodiment of the invention.
Fig. 5 is a cross-sectional view of a tower section according to a first embodiment of the present invention.
Fig. 6 is a schematic structural view of an ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining enhanced frustum-shaped tower according to a fourth embodiment of the present invention.
Detailed Description
The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below:
the first embodiment is as follows:
in this embodiment, referring to fig. 1 to 5, an ultra-large horizontal axis wind turbine using an inflatable pressure maintaining reinforced tower barrel includes a ground foundation, an integral tower barrel, a machine head device, a man-operated suspension cage device and an auxiliary device, the bottom of the integral tower barrel is seated and installed on the ground foundation, the lower end of the tower bottom section of the integral tower barrel is provided with an inner flange and an outer flange which are fixedly connected with the ground foundation through anchor bolts, a reinforcing rib plate 53 is arranged between the flange at both sides of each anchor bolt and the barrel wall, the machine head device includes a nacelle 21, a main shaft 20, a hub 19 and blades 18, the upper end of the tower top section of the integral tower barrel is matched with a support bearing 22, the support bearing 22 is connected with the nacelle flange, the nacelle 21 is provided with the main shaft 20, the hub 19 is installed on the main shaft 20, the blades 18 are installed on the hub 19, the integral, the connecting flange of the segmented tower cylinder adopts an outer flange, and the integral tower cylinder is mainly formed by connecting and installing a tower bottom section, a tower body section, a tower top head sealing section and a tower top section from bottom to top; the tower bottom section, the tower body section and the tower top head sealing section form a closed inflatable pressure maintaining container through flanges, the bottom of the inflatable pressure maintaining container is directly installed on a ground foundation, a sealing structure is adopted at a flange joint to form a sectional tower outer flange joint sealing device 11, a local section of an inner cavity of the whole tower barrel becomes an airtight inner cavity, a proper gas medium is injected into the airtight inner cavity, and pressure maintaining is carried out, wherein the pressure in the airtight inner cavity is as follows:
the pressure P in the airtight chamber is as follows:
Figure GDA0002738804080000081
in the formula, G is the total weight of the machine head device, and S is the cross-sectional area of the airtight inner cavity; the pressure P in the airtight inner cavity is 0.16-0.7 MPa;
the tower top sealing head section adopts a double-connected special-shaped flange 13, and a flange connecting part is formed on the lower surface or the upper surface of an outer lateral boss of the sealing head part of the pressure container; the ground foundation inside the tower bottom section is provided with an air sealing layer; an overhaul platform is arranged below each section of tower tube sealing structure in the tower, a movable pedestrian ladder is arranged between adjacent overhaul platforms, an overhaul manhole 2 is arranged at the bottom of the tower, a vent pipe 15 and an electric valve 16 are arranged on a head cover 14 of a tower top sealing section, a door opening 25 is arranged on the tower top section, a door opening platform 26 is arranged outside the door opening 25, pedestrian suspension cage devices are arranged outside the tower from the bottom to the top of the tower, a safety valve 10, a pressure gauge 8, a combustible and explosive gas detector 9, an inflation pipe 5 and an inflation valve 4 are arranged on the tower body, and an exhaust pipe and an exhaust valve 3 are connected to the inflation pipeline 5 between the inflation valve 4 and the tower; outside the tower, from the bottom of the tower up along the body to the top section, a combination cable 28 is laid at the cable passage opening 27 in the top section.
In this embodiment, referring to fig. 1 and 2, the man cage apparatus includes a hoist 38, a hoist rope 31, a head sheave 23, a head sheave support 24, a cage 36, a guide shoe 40, a T-shaped guide rail 34, a guide rail support 32, a cage platform 37, two symmetrically arranged head sheave supports 24 welded at the top of the tower top section, head sheave bearing blocks 41 mounted on the horizontal beams of the two head sheave supports 24, the hoist 38 mounted on the ground base below the cage platform 37, the cage 36 resting on the cage platform 37, the hoist rope 31 vertically led up from the drum of the hoist 38 around the head sheave 23 and then led down to be connected to the hanging point of the cage 36, the guide rail support 32 welded on the outer wall of the tower on both sides of the cage 36 and between the cage platform 37 and the head sheave 23 at an interval distance of 1.5 m in the height direction, and the T-shaped guide rail 34 mounted and fixed on the guide rail support 32, the upper and lower sides of the two sides of the cage body are respectively provided with a guide rail sliding shoe 40, a groove of the guide rail sliding shoe 40 is clamped into the T-shaped guide rail 34 during installation to form a sliding fit mechanism, the winch 38 is started to pull the cage 36 to move up and down, the door opening platform 26 is welded on the wall of the cylinder, a worker can reach the cage platform 37 through the escalator 39, then ascend to the door opening platform 26 through the cage 36 and then enter the door opening 25, and then enter the tower cavity of the tower top section and then enter the cabin 21.
In this embodiment, referring to fig. 1 and 3, two outer connecting flanges are used as connecting seams between the segmented towers to form an air-tight structure, the two outer connecting flanges are connected by bolts 44 and nuts 45, the inner rings of the two outer connecting flanges are symmetrical about the connecting seams, an annular dovetail groove with a dovetail-shaped cross section is processed, a dovetail-shaped elastic sealing ring 46 is embedded in the dovetail groove, and sealant is continuously poured along the joints between the two sides of the sealing ring and the dovetail groove to form two annular continuous and tight sealing rubber rings 43.
In the embodiment, referring to fig. 1 and 2, when a combined cable support 42 is welded on the outer wall of the tower from the bottom of the tower to the top of the tower along the body of the tower, and a combined cable support 42 is welded on the outer wall of the tower along cables at intervals of 1.5 meters upwards, a plurality of cables are laid side by side along the combined cable support 42, and are fixedly mounted on the combined cable support 42 by a cable clamp 29, are led up to the top of the tower, penetrate through the cable access port 27, enter the tower of the top of the tower, and then enter the cabin 21 to be electrically connected with the cabin electrical equipment.
In the present embodiment, referring to fig. 1-5, the integral tower is a cylindrical and straight cylindrical structure, and the integral tower is composed of a cylindrical and straight cylindrical tower bottom section 35, a cylindrical and straight cylindrical supporting seat section 33, a cylindrical and straight cylindrical tower body section 30, a cylindrical and straight cylindrical tower top head sealing section 12, and a cylindrical and straight cylindrical tower top section 17, the cylindrical and straight cylindrical supporting seat section 33 is disposed between the cylindrical and straight cylindrical tower bottom section 35 and the cylindrical and straight cylindrical tower body section 30, between straight cylindric tower section of thick bamboo lower part of circle and basis, the peripheral symmetry equipartition of outer wall around straight cylindric tower section of thick bamboo is equipped with 4 bearing diagonal members 6, and the central line of bearing diagonal member 6 becomes the contained angle that is not less than 30 degrees with tower section of thick bamboo axial lead, and the both ends of bearing diagonal member 6 all are equipped with the flange, and the flange joint of the outstanding supporting seat 7 on the one end of bearing diagonal member 6 and the straight cylindric tower section of thick bamboo of supporting seat section 33, and the other end and the bearing diagonal member ground foundation 1 of bearing diagonal member 6 are. The embodiment is an ultra-large horizontal axis wind turbine with a cylindrical, standardized, serialized, modularized, inflatable, pressure-maintaining and modified enhanced tower.
In the present embodiment, referring to fig. 1-5, the gas filled in the airtight cavity formed in the partial section of the inner cavity of the tower is nitrogen or clean air, and when the air compressor is used for filling air, the air compressor is an oil-free air compressor.
In this embodiment, referring to fig. 1, 3-5, after the body of the head-sealing section flange extends towards the inner ring, the body extends towards the opposite side flange to form a tubular protruding pipe, the outer diameter of the protruding pipe is smaller than the inner diameter of the opposite side flange, a gap of no more than 10mm is left between the two sides, the wall thickness of the protruding pipe is equal to the wall thickness of the end enclosure, a connection structure of the two-connection special-shaped flange 13 is formed, the end enclosure 14 of the pressure vessel is integrally connected with the protruding pipe on the two-connection special-shaped flange 13 in a butt welding manner, and simultaneously, the outer flange at the lower end of the tower top section is.
In the present embodiment, referring to fig. 1 and 5, the tower bottom section and the tower body section are assembled by at least 2 segmented towers respectively, and the diameter of the inner cavity of each tower is 6-12 meters.
In this embodiment, referring to fig. 1 and 5, the reinforcement bars are further tied on the ground in the tube for the second concrete pouring, the thickness is not less than 600 mm, the foundation bolts in the tube are completely covered to form the airtight structure of the secondary poured concrete surface layer, and then the pressure-resistant floor paint with the thickness not less than 10mm is arranged on the secondary poured concrete surface layer.
The embodiment is the super large-scale horizontal axis aerogenerator of the modified enhancement mode tower section of thick bamboo of pressurize is aerifyd for standardization, serialization, modularization, and as shown in figure 1, the tower section of thick bamboo shape is the straight cylindric of circle of same diameter from the tower bottom to the top of the tower, adopts the segmentation to make, and the segmentation fortune is to hoist and mount equipment shaping behind the installation scene, and the tower section of thick bamboo has 5 types according to the function from the bottom up segmentation: the tower comprises a round straight cylindrical tower bottom section 35, a round straight cylindrical supporting seat section 33, a round straight cylindrical tower body section 30, a round straight cylindrical tower top head sealing section 12 and a round straight cylindrical tower top section 17, wherein the sections are connected through outer flange bolts 44 and nuts 45, the round straight cylindrical tower bottom section 35, the round straight cylindrical supporting seat section 33, the round straight cylindrical tower top head sealing section 12 and the round straight cylindrical tower top section 17 are unique in a tower with the same diameter, the round straight cylindrical tower body section 30 is provided with a plurality of selectable numbers from dozens to dozens, the sizes, the structures and the materials of the sections are the same, the sections are universal, standardized and modularized, the sections are main parts forming the height of the tower and are modules of the height of the tower, and the height of the tower can be conveniently adjusted by increasing and decreasing the number of the round straight cylindrical tower body sections 30.
In this embodiment, referring to fig. 1 and 4, the tower is installed from bottom to top, the lower end of the cylindrical tower bottom section 35 is provided with an inner flange and an outer flange to be fixedly connected with ground foundation anchor bolts, a reinforcing rib plate 53 is arranged between the flange and the wall of each anchor bolt on both sides, the upper end of the cylindrical tower bottom section 35 is connected with the outer flange of the cylindrical tower support section 33, depending on the length of the inclined support member 6, one or more cylindrical tower body sections 30 can be inserted between the cylindrical tower bottom section 35 and the cylindrical tower support section 33, the upper end of the cylindrical tower support section 33 is connected with the outer flange of the cylindrical tower body section 30, the cylindrical tower body sections 30 are connected with each other according to the number required by design, the uppermost cylindrical tower body section 30 is connected with the outer flange at the lower end of the cylindrical tower top head section 12, the two-connecting flange 13 at the upper end of the cylindrical tower top head section 12 is connected with the outer flange at the lower end of the cylindrical tower top section 17, the upper end of the circular straight cylindrical tower top section 17 is matched with a supporting bearing 22 and is connected with an inner flange or an outer flange, the supporting bearing 22 is connected with a cabin flange, a main shaft 20 is installed on a cabin 21, a hub 19 is installed on the main shaft 20, and blades 18 are installed on the hub 19.
In this embodiment, after the inner and outer flanges at the bottom end of the circular straight cylindrical tower bottom section 35 are connected and fastened with the anchor bolts, reinforcing steel bars are tied on the foundation of the ground inside the cylinder, secondary concrete pouring is performed, the thickness is 0.6 m, and then the floor paint is applied on the concrete surface, and the thickness is 5-10 mm. The air sealing of the outer flange connecting seam between the segmented towers, the air sealing of the outer flange connecting seam between the round straight cylindrical tower bottom section 35, the round straight cylindrical supporting seat section 33, the round straight cylindrical tower body section 30 and the round straight cylindrical tower top sealing head section 12 can be realized according to a dovetail sealing scheme, as shown in figure 3, a dovetail sealing ring 46 is embedded in an annular dovetail groove, and two annular sealing rubber rings 43 are piled and injected at the joint between the two sides of the sealing ring and the flange.
In this embodiment, the pressurize is aerifyd to tower section of thick bamboo inner chamber, nitrogen gas is adopted to inflate, adopt nitrogen gas bottle or tank wagon liquid nitrogen to inflate, close motorised valve 16 on the breather pipe 15 before inflating, close the gas charging line that inspection manhole 2 and discharge valve 3 have connected nitrogen gas bottle or tank wagon nitrogen storage tank and tower section of thick bamboo, the relief pressure valve of output is equal to the operating pressure of tower section of thick bamboo to output atmospheric pressure on adjustment nitrogen gas bottle or the nitrogen storage tank, open charging valve 4 and aerify for the tower section of thick bamboo, until atmospheric pressure reaches operating pressure in the section of thick bamboo, it accomplishes to aerify, but at this moment for the pressurize and do not close the valve between gas cylinder or the gas holder output relief pressure. Adopt oil-free lubrication air compressor machine to aerify, accomplish the gas cylinder inflatable relevant operating procedure before aerifing, the inflation line of switch-on air compressor machine and tower section of thick bamboo, transfer the output pressure upper limit of air compressor machine to the operating pressure of tower section of thick bamboo, start the air compressor machine, open inflation valve 4, aerify for the tower section of thick bamboo through gas tube 5, when the tower section of thick bamboo reaches operating pressure, air compressor machine chance auto-stop, for the pressurize, do not close air compressor machine and inflation valve 4, can real-time tonifying qi pressurize in case the tower section of thick bamboo micro-leakage, this is because air compressor machine output pressure can automatic start aerifys.
In the embodiment, the inclined strut member is installed, in order to facilitate transportation and installation, the inclined strut member is manufactured in a segmented mode, two ends of the inclined strut member are provided with flanges, the segmented inclined strut member 6 is composed of a section of steel pipe and two welded ends of the steel pipe, the segmented inclined strut member 6 is universal, standardized and modularized in a tower barrel with the same diameter, the flanges of the segmented inclined strut member 6 are sleeved into foundation bolts on the ground foundation 1 and are pre-fastened when the inclined strut member is installed, then the segmented inclined strut member 6 is inserted between the flange at the upper end of the segment and the flange of the supporting seat 7 and is fastened and connected through the flange bolts, and therefore installation of 4 inclined strut members is completed.
In this embodiment, the cage lifting device comprises a winch 38, a lifting steel wire rope 31, a head sheave 23, a head sheave support 24, a cage 36, a guide rail sliding shoe 40, a T-shaped guide rail 34, a guide rail support 32 and a cage platform 37, wherein the top of the tower top section 17 is welded with two symmetrically arranged head sheave supports 24, a bearing seat 41 of the head sheave 23 is installed on a horizontal beam of the two head sheave supports 24, the winch 38 is installed on a ground foundation below the cage platform 37, the cage 36 is parked on the cage platform 37, the lifting steel wire rope 31 is vertically led up and down from a winding drum of the winch 38 to pass over the head sheave 23 and then is connected with a hanging point of the cage 36, the guide rail support 32 is welded on the outer wall of the tower at an interval of 1.5 meters from the cage platform 37 to the head sheave height at two sides of the cage 36, the guide rail support 32 is fixedly installed on the T-shaped guide rail 34, the upper and lower parts of two sides of the cage body are respectively provided with a guide rail sliding shoe 40, during installation, the groove of the guide rail sliding shoe 40 is clamped into the T-shaped guide rail 34, the guide rail sliding shoe and the T-shaped guide rail 34 form sliding fit, the hoisting machine 38 is started to realize the up-and-down operation of the cage 36, the door opening 25 is arranged on the tower bottom section 17, the door opening platform 26 is welded on the cylinder wall, and a worker can ascend to the cage platform 37 from the escalator 39, then ascend to the door opening platform 26 by taking the cage 36, enter the door opening 25, enter the tower top section 17 and then enter the cabin according to the prior art.
In the embodiment, the combined cable is laid, from the bottom of the tower to the cable passage port vertically upwards, a combined cable support 42 is welded on the wall of the tower every 1.5 meters, the combined cable 28 is fixed on the combined cable support 42 by using the cable clamp 29 and is laid along the cable support 42 until the cable passage port 27, the combined cable 28 enters the passage port 27 and enters the tower top section 17, then the connection with the cabin electrical equipment is performed according to the prior art, and the connection between the tower bottom combined cable and the power grid is performed according to the prior art. Installing a sealing element in the cylinder, opening the exhaust valve 3 and the electric valve 16 before installation, then opening the manhole 2, enabling an installer to enter the cylinder, arranging an annular platform with the width of 1 m at 1.5 m below each dovetail-shaped sealing groove along the periphery of the cylinder wall, arranging a movable staircase between the platforms, lifting the movable staircase during installation, putting down the staircase after one side of the dovetail-shaped sealing ring 46 passes over the lower end of the staircase, embedding the dovetail-shaped sealing ring 46 into an annular dovetail groove, and after finishing and leveling, piling and injecting 43 sealant rings at the joint between two sides of the dovetail-shaped sealing ring 46 and a flange to form two sealing rubber rings. The safety accessory of the tower cylinder is equivalent to a low-pressure container after the tower cylinder is inflated and pressurized, a pressure gauge 8, a flammable and explosive gas detector 9 and a safety valve 10 are required to be arranged on the tower cylinder according to the safety specification of the pressure container, and the tower cylinder is periodically inspected according to the specification.
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
in this embodiment, the structure without the inclined supporting member adopts the simplified structure of the first embodiment, and in the area without typhoon and hurricane where the maximum wind speed is not high, the supporting base section 33, the inclined supporting member 6 and the ground foundation 1 of the inclined supporting member can be omitted in the tower of the first embodiment under the condition that the tower foundation is sufficiently firm and the tower height is not very high, so as to form the tower structure without the inclined supporting member.
Example three:
this embodiment is substantially the same as the previous embodiment, and is characterized in that:
in the present embodiment, referring to fig. 6, the integral tower is a frustum-shaped structure, and the integral tower is composed of a frustum-shaped tower bottom section 49, a frustum-shaped tower body section 50, a frustum-shaped tower top head section 51, and a frustum-shaped tower top section 52. The super-large horizontal axis wind turbine of modified enhancement mode tower section of thick bamboo of pressurize is aerifyd to this embodiment, as shown in fig. 6, the tower section of thick bamboo is frustum shape, adopts the segmentation to make, and the segmentation fortune is reached and is hoisted the equipment shaping after the installation scene, and the tower section of thick bamboo has 4 types according to the functional segmentation: the frustum-shaped tower comprises a frustum-shaped tower bottom section 49, a frustum-shaped tower body section 50, a frustum-shaped head sealing section 51 and a frustum-shaped tower top section 52, wherein the sections are connected through outer flange bolts 44 and nuts 45, and in a frustum-shaped tower barrel with the same diameter, the frustum-shaped tower body section 50 is provided with a plurality of sections, more than ten sections and more than ten sections, but the sizes of the sections are different, so that the sections are not universal.
Referring to fig. 6, in the installation of the frustum-shaped tower barrel according to the embodiment, the inner and outer flanges are arranged at the lower end of the frustum-shaped tower bottom section 49 and fixedly connected with ground foundation anchor bolts, the upper end of the frustum-shaped tower bottom section 49 is connected with the outer flange bolt of the frustum-shaped tower body section 50, a set number of outer flanges of the frustum-shaped tower body sections which are matched and corresponding to each other are sequentially connected according to the design, the uppermost frustum-shaped tower body section is connected with the outer flange of the frustum-shaped head section 51, the second special-shaped flange at the upper end of the frustum-shaped head section 51 is connected with the outer flange at the lower end of the frustum-shaped tower top section 52, the upper end of the frustum-shaped tower top section 52 is matched with the supporting bearing 22, which may be an inner flange connection or an outer flange connection, the supporting bearing 22 is connected with the flange of the nacelle 21, the nacelle 21 is provided with the main shaft 20, the main shaft 20 is provided with.
Referring to fig. 6, the air seal of the tower of this embodiment, the sealing device of the outer flange connecting seam between the frustum-shaped tower bottom section 49, the frustum-shaped tower body section 50 and the frustum-shaped head sealing section 51 is the same as that of the first embodiment. The sealing scheme of the joint of the inner and outer flanges at the lower end of the frustum-shaped tower bottom section 49 and the ground foundation anchor bolt is the same as that of the first embodiment, and secondary reinforced concrete pouring and floor paint are performed. The steps of inflating and pressure maintaining in the tower cylinder, hoisting cage lifting device and pedestrian passageway, laying combined cables outside the cylinder, installing sealing elements in the cylinder and safety accessories of the tower cylinder are the same as those in the first embodiment.
In summary, the invention patent with the patent application number of CN20121033343.9 discloses a solar heat collection and energy storage power generation system using wind farm tower to perform air compressor, compared with the embodiment of the invention, the two embodiments are manufactured by sections, the sectional tower drums are connected by flanges, and the tower drums are made into sealed containers, the difference between the two embodiments is that the embodiment of the invention is used for improving the comprehensive performance of the tower drum and reducing the manufacturing cost, the purpose of the solar heat collection and energy storage power generation system using the wind power plant tower barrel is to compress air for energy storage, the pressure of the cylinder is kept at 0.16-0.7 MPa, the pressure difference of the air compressor solar heat collection and energy storage power generation system utilizing the tower cylinder of the wind power plant is 0-5 MPa or more, and the pressure difference is large.
The patent application number is CN20122048859.2 patent of the invention discloses a plateau wind generating set tower, including the multistage tower section that combines through the flange, the flange joint between the section is sealed with sealed glue, in order to guarantee the whole seal of plateau wind generating set tower, adopt the air pressure pump pressure boost to make the inside atmospheric pressure of tower keep above 82kpa, the tower has two sealing doors, personnel can get into the tower operation through the sealing door, plateau wind generating set tower's purpose is to solve the plateau district atmospheric pressure low, air density is little, can influence the normal reliable operation of wind turbine generator electrical equipment and the technical problem that maintenance personnel easily produce the plateau reaction when overhauing, when the altitude is 0 meter, atmospheric pressure is 101kpa, when the altitude is 4000 meters, atmospheric pressure is 54kpa, contrastive analysis: the embodiment of the invention is common to the plateau wind generating set tower, the flange connection of the sectional tower barrels is adopted, the sealing technology is adopted at the flange connection joint to enable the inner cavity of the whole tower barrel to be an airtight inner cavity, the inner cavity of the tower barrel is inflated and pressure maintained, and the difference lies in that: 1. the invention has different purposes of inflating and maintaining pressure, the tower frame of the plateau wind generating set aims at improving the comprehensive performance of the tower and reducing the manufacturing cost of the tower, the tower frame of the plateau wind generating set aims at solving the problem that the safety and reliability of the operation of electrical equipment are influenced by plateau low air pressure and the breathing safety of maintainers is different, 2, the sealing technical requirement grades are different, the tower is disassembled because the sealing gasket, the sealing element and the sealing glue between flange joint surfaces are replaced during the whole service life of the tower when the tower is assembled, the service lives of the sealing gasket, the sealing element and the sealing glue are limited, and the sealing gasket, the sealing element and the sealing glue are required to be replaced for 3 to 5 years, so the sealing scheme that the outer flange is connected, the dovetail groove is arranged at the inner ring of the flange connecting seam, the dovetail-shaped sealing ring is embedded in the dovetail groove, and the sealing glue is injected at the, and the utility model adopts that: the flange joint is sealed with a sealant. 3. The requirement of inflation gas media is different, the embodiment of the invention requires that the inflation gas is nitrogen or clean air, and the tower of the plateau wind generating set is inflated by a pneumatic pump. 4. The pressure for pressure maintaining is different, the pressure range for pressure maintaining in the embodiment of the invention is 0m at the altitude, the pressure P is 0.16-0.7 MPa, and the pressure maintaining of the plateau wind generating set tower is not less than 82kpa, which is equivalent to 82 kpa-101 kpa. 5. The applicable regions are different, the embodiment of the invention is suitable for all regions in the world including plateau regions, and the plateau wind generating set tower is suitable for high-altitude regions.
In summary, the above embodiment of the present invention provides, for the above 5 bottleneck problems, an airtight sealing device for inner cavities of a circular straight cylindrical tower and a frustum-shaped tower, wherein the towers are inflated and maintained at a certain working pressure, and the magnitude of the working pressure substantially satisfies: the working pressure is multiplied by the cross section area of the inner cavity of the tower cylinder to generate upward thrust which is equal to the gravity load of the machine head, and in addition, at least 3 symmetrical and uniformly distributed inclined supporting pieces are additionally arranged between the periphery of the outer wall of the lower part of the circular-straight cylindrical tower cylinder and the ground foundation to form the technical scheme of the ultra-large horizontal shaft wind driven generator with the modified enhanced tower cylinder. The gas pressure in the inner cavity of the tower cylinder in the embodiment of the invention can greatly improve the rigidity of the tower cylinder under the conditions that the diameter of the tower cylinder is not increased and the wall thickness of the tower cylinder is not increased, the pressure gas in the tower can also transmit part or all of the gravity load of the machine head above the supporting bearing to the inner ground of the tower bottom cylinder, thereby greatly improving the bearing capacity of the tower cylinder, the pressure gas in the tower can also play a role in damping and damping vibration reduction on the vibration of the tower cylinder, greatly reducing the amplitude of the vibration of the tower cylinder, particularly when the wind load is overlarge, the distance of the machine head of the tower top deviating from the center is much smaller than the original distance, the gravity load of the machine head on the wall of the tower cylinder is greatly reduced to be close to 0, and the product of the two has small toppling bending moment formed on the tower cylinder, thereby greatly improving the stress condition of the tower cylinder, improving the instability resistance of the tower, greatly improves the breaking and tilting resistance of the tower, namely the capability of resisting super typhoon and hurricane.
According to the embodiment of the invention, the comprehensive performance of the tower can be greatly improved by adopting the internal gas sealing of the tower, inflating and maintaining pressure and adding at least 3 inclined supporting pieces at relatively low cost at the lower part of the circular straight cylindrical tower, and the rule that the manufacturing cost of the tower rises exponentially along with the increase of the height of the tower is broken to a certain extent, so that the profit and loss balance point of the existing steel tower with the height of 180 meters can be broken through, the tower is made higher and larger, and the ultra-large scale of the tower is pushed to a higher level. The tower barrel of the embodiment of the invention can be divided into two types of circular straight cylindrical tower barrels and frustum-shaped tower barrels according to the shapes, the two types of tower barrels are manufactured in a segmented mode, the tower barrels are sequentially segmented from the tower bottom to the tower top, and the classification is carried out according to different functions of the segmented tower barrels. The segmented tower barrel of the cylindrical tower barrel in the embodiment of the invention can be divided into 5 types: the tower comprises a tower bottom section, a supporting seat section, a tower body section, a head sealing section and a tower top section, wherein the supporting seat section is special for a circular straight cylindrical tower barrel, and an oblique supporting piece is not arranged on the frustum-shaped tower barrel. The body section of the tower is the main part that constitutes a tower section of thick bamboo, each tower section of thick bamboo has contained a plurality of in, tens or dozens of body sections of the tower, the body section diameter of the straight cylindric tower section of thick bamboo of circle is the same, the size is the same, the structure is the same, the material is the same, it is standardized, general, it is the modularization, can regard as the module of adjusting tower section of thick bamboo height, also the convenient height of adjusting a tower section of thick bamboo of the number of accessible increase and decrease body section of thick bamboo, this brings very big convenience for designing, chooseing for use, making the tower section of thick bamboo. The segmented towers of the frustum-shaped tower can be divided into 4 types: the frustum tower bottom section, the frustum body section, the frustum head sealing section and the frustum tower top section are all frustum-shaped, and the sizes of all the frustum body sections are different and cannot be used universally. The manufacturing process of the segmented tower cylinder is basically the same as that of the prior art, steel plates are adopted to be rolled, formed and then flanges at two ends are welded, the difference is that inner flanges are welded at two ends of the frustum-shaped segmented tower cylinder in the prior art, and outer flanges are welded at two ends of the circular straight cylindrical segmented tower cylinder and two ends of the frustum-shaped segmented tower cylinder in the invention. In the tower bottom section of the tower barrel of the second embodiment of the invention, the inner and outer flanges are fixedly connected with ground foundation anchor bolts as in the prior art, and the outer flange is adopted at the upper end, the support base section of the second embodiment of the invention is special for a round and straight cylindrical tower barrel, so that the capability of resisting the attack of super-strong typhoon and hurricane is improved, the tower barrel is prevented from tilting, the section can be not additionally arranged in a region with lower maximum wind speed, 4 inclined supporting pieces and the support base section are omitted, the support base section is formed by welding at least 3 short steel pipes which form an included angle of 30 degrees with the axis of the tower body section symmetrically and uniformly along the outer wall of the tower body section, and the other end of each steel pipe is welded with a supporting piece connecting flange. The invention provides a technical scheme of a two-connection flange, wherein on the basis of a conventional outer flange, a body of a lower side flange extends to an inner ring for a gap and the width of the wall thickness of the end socket, and then extends upwards for a section of tubular structure by the wall thickness for welding with the end socket, the gap is not more than 10mm, and the flange connection of an upper sectional tower barrel and a lower sectional tower barrel is not influenced.
In the tower top section of the tower barrel of the second embodiment of the invention, the frustum tower top section is a tower section connected between the head sealing section and the support bearing, the tower top section is provided with a door opening and a cable passage opening, the lower end of the frustum tower top section is provided with an outer flange which is respectively connected with the head sealing section and the two connecting flanges of the frustum head sealing section, and the upper end of the tower top section and the frustum tower top section is connected with the support bearing flange and can be connected with the inner flange or the outer flange according to the prior art. For the airtight structure of the tower barrel of the embodiment of the invention, the circular straight barrel type and the frustum-shaped tower barrel are both a fully-closed tower barrel filled with suitable gas and keeping a certain working pressure, the tower barrel is manufactured in sections, transported in sections and hoisted in sections on site, and is assembled by connecting the outer flanges between the sections, so that a fully-closed inner cavity is formed in the inner cavity of the assembled tower barrel, the connecting seam of each pair of flanges in the inner cavity is required to be airtight, and the flanges of the tower bottom section and the ground foundation anchor bolts are required to be airtight. The technical scheme of providing the self-tightening dovetail-shaped or isosceles trapezoid sealing ring for the flange connecting seam of the segmented tower cylinder in the embodiment of the invention is that firstly, the inner flange connection of the segmented tower cylinder in the prior art is changed into the outer flange connection of the invention, so that the bolt position of the flange connection is not required to be sealed, only the connecting seam of the two flanges on the inner wall of the tower cylinder is required to be sealed, the dovetail shape is taken as the cross section of the sealing groove, the two flange connecting seams are taken as the symmetrical center, a half dovetail-shaped annular groove is processed on the inner ring side of the flange connector on one side, and the flange on the other side is also symmetrically processed, so that when the segmented outer flanges are connected, a dovetail-shaped annular sealing groove is formed on the inner side of the tower cylinder at the connecting seam, and during the sealing construction, the cross section is dovetail-shaped, the rubber sealing ring with the size matched with the sealing groove or slightly enlarged is embedded into, And after the inner cavity of the tower cylinder is filled with pressure gas, the air pressure acts on the sealing ring to tightly press the sealing ring on the sealing surface, so that a better air sealing effect is achieved, the depth of the dovetail groove is 30 mm, the wide edge of the dovetail groove is 70 mm, and the narrow edge of the dovetail groove is 60 mm.
According to the sealing scheme of the self-tightening dovetail-shaped sealing ring provided by the embodiment of the invention, the sealing effect can be further enhanced by filling the pressure gas into the tower, and when the tower barrel is bent, twisted and the like under the action of strong wind, the elasticity of the sealing ring and the sealant can play a good deformation compensation role, so that the airtight effect cannot be influenced. The dovetail seal ring of the above embodiment of the invention may be rubber, plastic, rubber plastic or other suitable materials and composites, and is required to be elastic, airtight, durable, flame retardant and non-flammable and explosive gas releasing material. According to the embodiment of the invention, the air seal at the joint of the tower bottom flange is adopted, the inner flange and the outer flange are fixedly connected with the ground foundation anchor bolt at the bottom ends of the tower bottom section and the cone table tower bottom section, the invention adopts a sealing scheme that the ground foundation in the tower is poured with the reinforced concrete for the second time and then is made with the floor paint, namely: after the foundation bolts of the tower barrel are fastened, reinforcing steel bars are tied on the ground foundation in the barrel, secondary concrete pouring is conducted, the thickness is 0.6 m, the concrete is required to be compact, not prone to cracking, airtight and pressure-resistant, a layer of floor paint is made on the concrete surface after maintenance, the thickness is 5-10 mm, and the floor paint is required to have certain elasticity, pressure resistance, durability and flame retardance, and cannot release inflammable and explosive gases. According to the maintenance manhole in the embodiment of the invention, the sealing elements in the cylindrical tower barrel need to be replaced once in 3 to 5 years after a certain service cycle, so that the outward-opening maintenance manhole is arranged on the cylinder walls near the bottoms of the tower bottom section and the frustum tower bottom section, and the technical requirement for the manhole opening is implemented according to the manhole technical standard of a low-pressure container. In the cylindrical internal maintenance platform in the embodiment of the invention, in order to facilitate the construction operation of replacing the sealing element and shorten the operation time, an annular platform with the width not more than 1 meter is arranged below each sealing ring and the width not more than 1 meter is arranged below each sealing ring. The movable crawling ladder is arranged in the barrel, and the movable crawling ladder is arranged from the bottom in the barrel to each layer of platform of the sealing head section in order to facilitate the construction operation of replacing each layer of sealing element. The maintenance personnel permeability cell keeps the circulation of air when in order to guarantee that maintenance personnel gets into a section of thick bamboo, and the welding has the permeability cell on the top of the tower head, is equipped with the motorised valve on the permeability cell, and motorised valve and manhole are opened simultaneously and can be kept the circulation of air in a section of thick bamboo, and the two is closed simultaneously and can be kept airtight in a section of thick bamboo. In the charging, discharging pipe and the valve of the embodiment of the invention, for charging and discharging gas to and from the tower, the charging pipe is welded near the bottom of the outer side of the tower, the charging pipe is provided with the charging valve, the discharging pipe is connected between the charging valve and the tower, the discharging valve is arranged on the discharging pipe, the discharging valve is closed, the gas inlet valve is opened to charge the tower, the gas charging valve is closed, the discharging valve is opened to discharge gas to the tower, and the two valves are closed simultaneously to keep the internal sealing of the tower. The working pressure of the inflatable pressure-maintaining tower cylinder in the embodiment of the invention can be calculated as follows: the upward acting force generated by multiplying the working pressure by the inner cross-sectional area of the cylinder is equal to the total weight load of the tower top section above the tower drum end socket and the machine head equipment, and the frustum-shaped tower drum is characterized in that: work pressure multiplies the total weight load of frustum tower top section and aircraft nose equipment more than the head of a tower section of thick bamboo that the ascending effort that the section of thick bamboo inner cross-sectional area produced of head flange department produced, like this, on total weight load accessible section of thick bamboo inner pressure gas all transmits the ground basis in a section of thick bamboo above the two head, because tower section of thick bamboo diameter variation in size and tower top aircraft nose equipment gravity load variation in size, work pressure is also different, and the value range of working pressure is: 0.16-0.7 MPa, the larger the diameter of the tower barrel is, the smaller the working pressure is. The tower corresponds to a low-pressure vessel and must be managed with reference to the relevant specifications of the pressure vessel. According to the property of the tower cylinder filled with the gas medium in the embodiment of the invention, the tower cylinder is preferably filled with nitrogen, so that explosion caused by oxidation reaction can be prevented, but metal magnesium cannot be contained in the cylinder, nitrogen and magnesium can generate violent chemical reaction, when air is used as the inflation medium, an oil-free lubrication air compressor is required to be adopted, the charged air needs to be clean, the food grade which can be directly breathed by human bodies is required to be achieved, oil mist and oil drops are not required to be contained, so that explosion caused by formation of combustible mixed gas can be prevented, other flame-retardant explosion-proof gas can also be used as the inflation medium, and the authentication is required to meet the safety condition. According to the operation management of the safety accessories of the tower barrel, the safety valve, the pressure gauge and the flammable and explosive gas detector are arranged on the tower barrel, and the accessories need to be periodically checked and checked in the operation process according to the standard requirement according to the safety operation management standard of the pressure container. The anti-explosion safety measures of the tower barrel of the embodiment of the invention are as follows:
1. substances which are easily volatilized into flammable and explosive gases cannot be used in the cylinder, and the substances are oils such as gasoline, kerosene, diesel oil, alcohol and turpentine, grease, oil agent, paint or other chemicals with similar properties;
2. combustible and explosive substances including oils, grease, oil solutions and other chemicals with similar properties and one of aluminum powder, magnesium powder and other metal powder with similar properties cannot be retained or stored in the barrel, and combustible and explosive dust including one of cotton, flour and other dust with similar properties cannot be mixed in the barrel;
3. before the tower drum is put into operation, the tower drum can be put into operation after being checked to be qualified by professional safety departments, and the safety items are not completed in the specification and are executed according to the requirements of the professional safety departments.
In the cable laying on the outer wall of the tower cylinder of the embodiment of the invention, the control cable is connected with an external power grid through the cable laying in the cylinder, which is different from the power cable in the cabin of the wind driven generator in the prior art, pressure gas is filled in the cylinder, therefore, cables are laid along the outer wall of the tower body instead of the outer wall of the tower, a combined cable support is welded from the bottom of the tower to the lower part of a cable channel opening formed in the tower top section and the frustum tower top section every 1.5 meters, a plurality of cables are laid along the combined cable support side by side during laying, and fixedly mounting the cable on a cable support by using a cable clamp, leading the cable to the tower top section, penetrating the frustum tower top section into a cable passage opening to enter the tower top section and the frustum tower top section tower barrel, then entering the engine room to be connected with the electrical equipment of the engine room, wherein the connection is the same as that in the prior art, the connection is carried out by adopting a current collector or winding the cable, and the connection of a cable end at the bottom of the tower barrel and a power grid is the same as that in the prior art. The invention provides a pedestrian cage outside a tower, which is different from a pedestrian elevator arranged in a cylinder in the prior art, the pedestrian elevator is changed into the pedestrian cage and is arranged outside the tower, two symmetrical triangular head sheave supports formed by I-steel are welded on the cylinder walls of the top section and the upper part of the top section of a frustum, head sheaves with the diameter not more than 1 m are arranged on horizontal beams of the two triangular head sheave supports, a hoisting steel wire rope bypasses the head sheaves, the steel wire rope close to one side of the cylinder wall is led to a tower bottom winch downwards, a steel platform is arranged above the winch with the clearance not more than 3 m and used for parking the cage, the steel wire rope bypasses the other side of the head sheaves and is led to the tower bottom to be connected with a hanging point of the cage, T-shaped elevator guide rails are arranged on two sides of the cage from the tower bottom cage platform to the height of the head sheaves upwards, and are fixedly connected with the guide rail supports welded on the cylinder wall, guide rail sliding shoes are fixed on two sides of the suspension cage, the guide rail sliding shoes are clamped into the guide rail to form sliding fit during installation, the suspension cage can run up and down along the guide rail by starting the winch, a door opening platform is arranged on the lower edge of a door opening of the tower top section and the frustum tower top section, the door opening platform is welded on the cylinder wall, the suspension cage goes up to the door opening platform, a side door of the suspension cage is opened, workers can come out from the suspension cage and enter the door opening through the door opening platform, namely enter the tower top section cylinder, and then how to enter the cabin to be executed according to the prior art.
In summary, the above embodiments of the present invention provide an ultra-large horizontal axis wind turbine with an inflatable pressure maintaining modified enhanced tower, where the tower is in a circular straight cylinder shape and a frustum shape, and both adopt segmented external flanges for connection, the joint is sealed, the top is provided with a head, the bottom in the tower is provided with an air sealing layer, the inner cavity of the tower forms an air-tight closed cavity, gas is injected and pressure is maintained, the pressure P in the air-tight closed cavity is 0.16 to 0.7MPa, and at least 3 inclined supporting members are further arranged between the lower part of the circular straight cylinder tower and the foundation, so that the stress condition is improved, and the comprehensive performance is greatly improved: the circular straight cylindrical tower barrel is particularly suitable for establishing standardized, serialized and modularized national and international standards, can change the complicated design of the tower barrel into a model selection design, and is very efficient, simple and convenient.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the embodiments, and various changes and modifications can be made according to the purpose of the invention, and any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention shall be equivalent substitutions, as long as the purpose of the present invention is met, and the present invention shall fall within the protection scope of the present invention as long as the technical principle and inventive concept of the ultra-large horizontal axis wind turbine using the inflatable pressure-maintaining reinforced tower drum of the present invention are not departed.

Claims (10)

1. An ultra-large horizontal axis wind driven generator adopting an inflatable pressure-maintaining enhanced tower barrel comprises a ground foundation, an integral tower barrel, a machine head device, a pedestrian suspension cage device and an auxiliary device, wherein the bottom of the integral tower barrel is arranged on the ground foundation in a sitting mode, an inner flange and an outer flange are arranged at the lower end of a tower bottom section of the integral tower barrel and fixedly connected with the ground foundation through foundation bolts, reinforcing rib plates (53) are arranged between the flanges at two sides of each foundation bolt and a barrel wall, the machine head device comprises a cabin (21), a main shaft (20), a hub (19) and blades (18), the upper end of a tower top section of the integral tower barrel is matched with a supporting bearing (22), the supporting bearing (22) is connected with the cabin flange, the main shaft (20) is arranged on the cabin (21), the hub (19) is arranged on the main shaft (20), the blades (18) are arranged on, carry out flange joint between the adjacent segmentation tower section of thick bamboo, its characterized in that: the connecting flange of the segmented tower cylinder adopts an outer flange, and the integral tower cylinder is formed by connecting and installing a tower bottom section, a tower body section, a tower top head sealing section and a tower top section from bottom to top; the tower bottom section, the tower body section and the tower top head sealing section form a closed inflation pressure maintaining container through flanges, the bottom of the inflation pressure maintaining container is directly installed on the ground, a sealing structure is adopted at a flange joint to form a sectional tower outer flange joint sealing device (11), so that the local section of the inner cavity of the whole tower barrel becomes an airtight inner cavity, a gas medium is injected into the airtight inner cavity, the gas medium is nitrogen or clean air, the pressure maintaining is carried out, and the pressure P in the airtight inner cavity is as follows:
Figure FDA0002758008360000011
in the formula, G is the total weight of the machine head device, and S is the cross-sectional area of the airtight inner cavity; the tower top sealing head section adopts a double-connection special-shaped flange (13), and a flange connecting part is formed on the lower surface or the upper surface of the outer lateral boss of the sealing head part of the pressure container; the ground foundation inside the tower bottom section is provided with an air sealing layer; an overhaul platform is arranged below each section of tower tube sealing structure in the tower, a movable pedestrian ladder is arranged between adjacent overhaul platforms, an overhaul manhole (2) is arranged at the bottom of the tower, an air pipe (15) and an electric valve (16) are arranged on a head (14) of a tower top head sealing section, a door opening (25) is arranged on the tower top section, a door opening platform (26) is arranged outside the door opening (25), pedestrian suspension cage devices are arranged outside the tower from the tower bottom to the tower top, a safety valve (10), a pressure gauge (8), a combustible and explosive gas detector (9), an inflation pipe (5) and an inflation valve (4) are arranged on the tower body, and an exhaust pipe and an exhaust valve (3) are connected to the inflation pipe (5) between the inflation valve (4) and the tower; a combined cable (28) is laid on a cable access opening (27) of the tower top section from the bottom of the tower to the tower top section along the tower body.
2. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the pressure P in the airtight inner cavity is 0.16-0.7 MPa; when the air compressor is used for inflating, the air compressor is an oil-free lubrication air compressor.
3. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the integral tower barrel is of a round straight barrel-shaped structure and consists of a round straight barrel-shaped tower bottom section (35), a round straight barrel-shaped supporting seat section (33), a round straight barrel-shaped tower body section (30), a round straight barrel-shaped tower top sealing head section (12) and a round straight barrel-shaped tower top section (17), the round straight cylinder shaped supporting seat section (33) is arranged between the round straight cylinder shaped tower bottom section (35) and the round straight cylinder shaped tower body section (30), between straight cylindric tower section of thick bamboo lower part of circle and basis, the peripheral symmetry equipartition of outer wall around straight cylindric tower section of thick bamboo is equipped with 3 at least diagonal bracing pieces (6), the central line of diagonal bracing piece (6) becomes the contained angle that is not less than 30 degrees with a tower section of thick bamboo axial lead, the both ends of diagonal bracing piece (6) all are equipped with the flange, the flange joint of the outstanding supporting seat (7) on the one end of diagonal bracing piece (6) and the tower section of thick bamboo of straight cylindric supporting seat section (33), the other end and the bracing piece ground foundation (1) of diagonal bracing piece (6) are supported and are connected.
4. The ultra-large horizontal axis wind turbine employing the inflatable pressure-maintaining reinforced tower according to claim 3, wherein: the cylindrical tower body section (30) is formed by assembling at least 2 cylindrical segmented towers with the same structure, size and material, and the diameter of the inner cavity of each tower is 6-12 m.
5. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the integral tower barrel is of a frustum-shaped structure and consists of a frustum-shaped tower bottom section (49), a frustum-shaped tower body section (50), a frustum-shaped tower top sealing head section (51) and a frustum-shaped tower top section (52).
6. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: two connecting outer flanges are adopted between the segmented tower cylinders to form an air-tight seal structure for connecting seams, the two connecting outer flanges are connected by bolts (44) and nuts (45), the inner rings of the two connecting outer flanges are symmetrical about the connecting seams, an annular dovetail groove with a dovetail-shaped cross section is processed, a dovetail-shaped elastic sealing ring (46) is embedded in the dovetail groove, and sealant is continuously poured along the joint between the two sides of the sealing ring and the dovetail groove to form two continuous and tight sealing rubber rings (43).
7. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: after the body of the end sealing section flange extends towards the inner ring, the body extends towards the opposite side flange to form a tubular convex pipe, the outer diameter of the convex pipe is smaller than the inner diameter of the opposite side flange, a gap which is not more than 10mm is left between the outer diameter of the convex pipe and the inner diameter of the opposite side flange on one side of the convex pipe, a connecting structure of a two-connection special-shaped flange (13) is formed, an end socket (14) of a pressure container is integrally connected with the convex pipe on the two-connection special-shaped flange (13) in a butt welding mode, and meanwhile, an outer flange at; the wall thickness of the convex pipe is equivalent to that of the seal head (14).
8. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the pedestrian cage device comprises a winch (38), a hoisting steel wire rope (31), a head sheave (23), head sheave supports (24), a cage (36), guide rail sliding shoes (40), T-shaped guide rails (34), guide rail supports (32) and a cage platform (37), wherein the top of a tower top section is welded with the two symmetrically arranged head sheave supports (24), a head sheave bearing seat (41) is arranged on a horizontal beam of the two head sheave supports (24), the winch (38) is arranged on a ground foundation below the cage platform (37), the cage (36) is parked on the cage platform (37), the hoisting steel wire rope (31) is vertically led upwards from a winding drum of the winch (38) to bypass the head sheave (23) and then is led downwards to be connected with a hoisting point of the cage (36), the two sides of the cage (36) are arranged between the cage platform (37) and the head sheave (23), and the spacing distance between the cage platform (37) and the head sheave (23) is not more than 1.5 meters along the height direction, the guide rail support (32) is welded on the outer wall of the tower barrel, a T-shaped guide rail (34) is fixedly installed on the guide rail support (32), a guide rail sliding shoe (40) is respectively arranged on each of the upper side and the lower side of the two sides of the cage body, a groove of the guide rail sliding shoe (40) is clamped into the T-shaped guide rail (34) during installation, a sliding fit mechanism is formed, a winch (38) is started to pull the cage (36) to move up and down, a door opening platform (26) is welded on the wall of the tower, a worker can reach the cage platform (37) through an escalator (39), then ascends to the door opening platform (26) through the cage (36), and then enters a door opening (25), and then enters the cavity of the tower barrel of the tower top section and then enters the.
9. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: the method comprises the steps that a combined cable support (42) is welded on the outer wall of a tower barrel from the bottom of the tower to the top of the tower along the tower body upwards, a plurality of cables are laid along the combined cable support (42) side by side when the combined cable support (42) is arranged on the outer wall of the tower barrel upwards along the cables, the cables are fixedly installed on the combined cable support (42) through a cable clamp (29), are guided to the top of the tower section upwards, penetrate through a cable channel opening (27), enter the tower barrel of the top of the tower section and then enter a cabin (21) to be electrically connected with cabin electrical equipment.
10. The ultra-large horizontal axis wind turbine employing an inflatable pressure maintaining reinforced tower according to claim 1, wherein: and (3) tying reinforcing steel bars on the ground foundation in the cylinder for secondary concrete pouring, wherein the thickness of the reinforcing steel bars is not less than 600 mm, completely covering foundation bolts in the cylinder to form an airtight structure of a secondary poured concrete surface layer, and then arranging pressure-resistant floor paint with the thickness of not less than 10mm on the secondary poured concrete surface layer.
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