A floating dry-type transformer for offshore wind power and a method of using the same

Abstract

The application belongs to the technical field of transformers, and particularly relates to a suspension type dry transformer for offshore wind power and a use method thereof, which comprises a base plate, the upper end of the base plate is provided with a wind power tower and a limiting rod, the limiting rod is externally provided with a lifting platform, a storage part, the storage part comprises a shell, a water passing pipe and a sealed box are arranged in the shell, a high-pressure box is connected to the left side of the sealed box, a sealing part, the sealing part comprises an extrusion film, an expansion strip is arranged on the inner side of the extrusion film, a heat dissipation part, the heat dissipation part comprises a heat conduction pipe a and a heat conduction pipe b, the heat conduction pipe a is arranged on the outer ring of the water passing pipe, the left side of the heat conduction pipe b is connected with a heat dissipation plate, and the left side of the heat dissipation plate extends out of the shell. The transformer of the wind power tower is externally arranged, not only seawater is used for heat dissipation, but also subsequent maintenance of the transformer is facilitated, and when the passive self-circulation heat dissipation efficiency is insufficient, active heat dissipation is carried out, and the double heat dissipation mode is used to ensure the stable operation of the transformer.

Description

Technical Field

[0001] This invention belongs to the field of transformer technology, specifically relating to a suspended dry-type transformer for offshore wind power and its usage method. Background Technology

[0002] Offshore wind power, as an important component of clean energy, has experienced rapid development globally in recent years. Compared to onshore wind power, offshore wind power offers advantages such as stable wind energy resources, large single-unit capacity, and no land occupation. However, the harsh marine environment also presents unprecedented challenges to the operation and maintenance of wind power equipment.

[0003] Firstly, in offshore wind power systems, transformers play a crucial role in converting the electrical energy output from generators into voltage, and their reliability directly affects the operational efficiency of the entire wind power system. Currently, offshore wind farms commonly use a method of placing transformers inside the tower, that is, installing the transformer on the platform or foundation level of the wind turbine tower. This results in a severe lack of maintenance space inside the tower, making it difficult for maintenance personnel to access the equipment for inspection and maintenance. When a transformer fails and needs to be replaced, it is necessary to dismantle part of the tower structure and even use large offshore lifting equipment, and the working window is greatly affected by weather and sea conditions.

[0004] Secondly, offshore wind turbine transformers generate a large amount of heat during operation, and the interior of the tower is a relatively enclosed space with poor heat dissipation. To ensure that the transformer operates within the allowable temperature range, it must be equipped with a forced air-cooling or water-cooling system and air conditioning dehumidification equipment. These auxiliary systems themselves consume a large amount of electrical energy, reducing the net output efficiency of the wind power system. Summary of the Invention

[0005] The purpose of this invention is to provide a suspended dry-type transformer for offshore wind power and its usage method. This method allows the transformer of the wind turbine tower to be placed externally, which not only utilizes seawater for heat dissipation but also facilitates subsequent maintenance of the transformer. Furthermore, it can actively dissipate heat when the passive self-circulation heat dissipation efficiency is insufficient, thus ensuring the stable operation of the transformer through a dual heat dissipation approach.

[0006] The specific technical solution adopted by this invention is as follows:

[0007] A suspended dry-type transformer for offshore wind power includes:

[0008] The chassis has a wind turbine tower and a limit bar on its upper part, and a lifting platform is installed outside the limit bar.

[0009] The storage unit includes an outer shell, which is fixedly connected to the top of the lifting platform. A water pipe is installed inside the outer shell, with its two ends located at the upper end of the outer shell and the lower end of the lifting platform, respectively. A sealed box is installed inside the outer shell, and a high-pressure box is connected to the left side of the sealed box.

[0010] The sealing part comprises an extrusion film arranged in the high-pressure box, and an expansion strip is arranged at the position inside the extrusion film;

[0011] The heat dissipation part comprises a heat conduction pipe a arranged outside the sealing box and sleeved on the outer ring of the water passing pipe, a heat conduction pipe b fixedly connected in the inner cavity of the sealing box, and a heat dissipation plate connected to the left side of the heat conduction pipe b, and the left side of the heat dissipation plate extends out of the shell.

[0012] The temperature generated by the operation of the transformer in the sealing box is introduced into the water passing pipe through the heat conduction pipe a, the water passing pipe heats the seawater in the inner cavity, the heated seawater rises upward, and the seawater below flows into the water passing pipe, so that self-circulation heat dissipation is realized, and when the heat dissipation efficiency is insufficient, the heat dissipation plate dissipates heat to the heat conduction pipe b.

[0013] In a preferred scheme, the upper end of the base plate is fixedly connected with a wind power tower on the left side, and a cable is electrically connected to the lower end of the rear side of the wind power tower, the lower end of the cable extends into the inner cavity of the shell, the limiting rod is provided with four, which are distributed on the right side of the upper end of the base plate, and the lifting platform is slidingly connected to the outer ring of the four groups of limiting rods.

[0014] In a preferred scheme, the upper end of the lifting platform is fixedly connected with a pull rope at four corners, the upper end of the pull rope extends into the inner cavity of the limiting rod, the inner cavity of the base plate is fixedly installed with an elevator at the lower end, the pull rope penetrates through the limiting rod and the base plate and is fixedly connected in the take-up reel of the elevator, and the inner cavity of the limiting rod is rotatably connected with a guide wheel at the upper end, and the middle section of the pull rope is rollingly connected to the outer ring of the guide wheel.

[0015] In a preferred scheme, the shell is fixedly connected to the upper end of the lifting platform, the water passing pipe is provided with multiple groups, which are evenly distributed on the front and rear sides and the right side of the inner cavity of the shell, and the lower end inlet of the water passing pipe penetrates through the shell and the lifting platform and is arranged at the lower end of the lifting platform, while the upper end outlet of the water passing pipe is arranged above the shell, and the filter screen is arranged at the upper end outlet and the lower end inlet of the water passing pipe.

[0016] In a preferred scheme, the sealing box is fixedly connected in the inner cavity of the shell, and a through hole is formed in the left side of the upper end of the sealing box, and the high-pressure box is fixedly connected to the left side of the through hole, and the left side of the high-pressure box is in communication with the left side of the shell, and the cable extends into the sealing box through the shell and the high-pressure box.

[0017] In a preferred scheme, the sealing part further comprises a support fixedly connected in the inner cavity of the high-pressure box, and the outer ring of the support is fixedly connected with four groups of extrusion films, and the four groups of extrusion films are attached to the outer ring of the cable.

[0018] In a preferred scheme, the sealing part further comprises a gas feeding ring fixedly connected to the left side of the inner cavity of the sealing box, and four groups of outlets are formed in the left end of the gas feeding ring, and four groups of expansion strips are communicated with the four groups of outlets, and the four groups of expansion strips are in contact with the outer ring of the cable, and the four groups of expansion strips are arranged between the cable and the extruded film, and the left side of the sealing box is fixedly connected with a gas pump, and the lower end of the gas feeding ring and the lower end of the high-pressure box are communicated with a three-way pipe, and the lower end inlet of the three-way pipe is communicated with the outlet of the gas pump, and the two side outlets of the three-way pipe are fixedly connected with electric valves.

[0019] In a preferred scheme, the heat conduction pipe a is provided in multiple groups, arranged in the inner cavity of the shell and sleeved on the outer ring of the water passing pipe in the inner cavity of the shell, and the heat conduction pipe a is fixedly connected with the heat conduction pipe b penetrating through the sealing box.

[0020] In a preferred scheme, the heat conduction pipe b is fixedly connected in the inner cavity of the sealing box, and the heat conduction pipe b is a hollow structure and is communicated with two air pipes at the left two ends, the left ends of the two groups of air pipes extend out of the sealing box and are communicated with heat dissipation plates, the heat dissipation plates are fixedly connected in the inner cavity of the shell, and the left ends of the heat dissipation plates extend out of the shell, the inner cavity of the shell is fixedly connected with a fan at the lower end, and the inlet and outlet of the fan are communicated with the left and right sides of the middle part of the front air pipe.

[0021] A use method of the offshore wind power suspension type dry-type transformer, characterized in that: being suitable for the offshore wind power suspension type dry-type transformer in any one of claims 1 to 9, comprising:

[0022] S1: sinking into seawater, driving the lifting platform to descend during use, so that the shell and the transformer are lowered below the sea level and enter the seawater, at this time, the temperature generated by the operation of the transformer is transmitted to the heat conduction pipe a through the heat conduction pipe b, and then transmitted to the seawater through the water passing pipe, and the heated seawater rises upward, so that the seawater below the lifting platform fills into the water passing pipe, realizing simple self-circulating water cooling to cope with the temperature generated by the operation of the transformer in a conventional state;

[0023] S2: active heat dissipation, when the water passing pipe cannot meet the heat dissipation demand due to high-intensity operation of the transformer, the heat dissipation part drives the gas in the heat conduction pipe b to flow into the heat dissipation plate, and then the heat conduction pipe b exchanges heat with the seawater through the heat dissipation plate, so as to dissipate the temperature generated by the operation of the transformer, realizing simultaneous operation of active heat dissipation and self-circulating heat dissipation, and ensuring the efficiency of heat dissipation;

[0024] S3: maintenance operation, when the transformer needs to be maintained and repaired, the lifting platform is driven to rise and separate from the seawater, at this time, the transformer can be repaired without contacting the wind power tower, avoiding the need to disassemble the shell of the wind power tower when the transformer is maintained, and affecting the construction efficiency and intensity.

[0025] The technical effects obtained by the present application are:

[0026] The lifting platform and the storage part of the application can externally place the transformer of the wind power tower in seawater, not only can utilize seawater for heat dissipation, but also is convenient for subsequent maintenance of the transformer; when in use, the transformer of the wind power tower is installed into the sealed box, then the lifting platform is controlled to descend until the shell and the sealed box are immersed in seawater, at this time, the water pipe can transfer the temperature generated during operation of the transformer to seawater, through the principle of water heating rising, the heated seawater floats upwards, and the cold seawater enters the water pipe from below, realizing self-circulation heat dissipation, and when maintenance is needed, the lifting platform and the transformer are driven to rise, so that the transformer extends out of seawater, so as to facilitate maintenance;

[0027] The sealing part of the application can ensure the sealing effect of the energy storage part when the energy storage part is immersed in seawater, avoiding seawater erosion and affecting normal use of the device; before the lifting platform is lowered into seawater, the inflation part of the sealing part first fills the inflation strip with gas to make it expand and fit the outer circle of the wind power tower cable, then the high-pressure box is filled with gas, the high-pressure gas in the high-pressure box pushes the extrusion film to fit the outer circle of the wind power tower cable, and at the same time, the inflation strip is extruded to fill the gap between adjacent extrusion films, ensuring the sealing effect;

[0028] The heat dissipation part of the application can actively dissipate heat when the passive self-circulation heat dissipation efficiency is insufficient, and utilizes double heat dissipation to ensure stable operation of the transformer; when the self-circulation heat dissipation of the water pipe is insufficient to cope with the high-load operation state of the transformer, the driving part of the heat dissipation part drives the gas in the heat conduction pipe b to enter the heat dissipation plate to exchange heat with seawater, and the cooled gas flows back into the heat conduction pipe b to circulate and dissipate heat, thereby utilizing active and passive double heat dissipation to dissipate heat of the transformer, ensuring the efficiency and effect of heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is the overall structure schematic diagram of the application;

[0030] Figure 2 is the rear view schematic diagram of the overall structure of the application;

[0031] Figure 3 is the cross-sectional view schematic diagram of the chassis of the application;

[0032] Figure 4 is the cross-sectional view schematic diagram of the limiting rod of the application;

[0033] Figure 5 is the lower view schematic diagram of the lifting platform of the application;

[0034] Figure 6 is the top view cross-sectional view schematic diagram of the shell of the application;

[0035] Figure 7 is the front view cross-sectional view schematic diagram of the shell of the application;

[0036] Figure 8 is the cross-sectional view of the high-pressure tank in the present application;

[0037] Figure 9 is the position schematic diagram of the expansion strip in the present application;

[0038] Figure 10 is the position schematic diagram of the air feeding ring in the present application;

[0039] Figure 11 is the cross-sectional view of the sealing tank in the present application;

[0040] Figure 12 is the structural schematic diagram of the heat-conducting pipe b in the present application;

[0041] Figure 13 is the position schematic diagram of the heat-conducting pipe b and the heat-conducting pipe a in the present application.

[0042] In the drawings, the components represented by each reference numeral are listed as follows:

[0043] 10, base plate; 11, wind power tower; 12, cable; 13, limiting rod; 14, lifting platform; 15, pull rope; 16, hoist; 17, guide wheel;

[0044] 20, storage part; 21, outer shell; 22, water pipe; 23, filter screen; 24, sealing tank; 25, high-pressure tank;

[0045] 30, sealing part; 31, support; 32, extruded film; 33, expansion strip; 34, air feeding ring; 35, air pump; 36, three-way pipe; 37, electric valve; 40, heat dissipation part; 41, heat-conducting pipe a; 42, heat-conducting pipe b; 43, air pipe; 44, heat dissipation plate; 45, fan. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] In the following description, a lot of specific details are set forth in order to give a full and thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0048] Second, the "one embodiment" or "an embodiment" referred to herein can include a particular feature, structure, or characteristic. The various embodiments appearing at different places in the specification are not necessarily all cumulative or mutually exclusive of each other. In addition, the "in a preferred embodiment" appearing at different places in the specification does not necessarily refer to the same embodiment, nor is it an embodiment that is separate from or mutually exclusive of other embodiments.

[0049] Third, the present application is described in detail in conjunction with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0050] Embodiment 1

[0051] Please refer to the accompanying Figures 1 to 3 , Figures 5 to 11 The first embodiment of the present application provides a suspension type dry transformer for offshore wind power, which comprises:

[0052] The bottom plate 10 is provided with a wind power tower 11 and a limiting rod 13 at the upper end of the bottom plate 10, and a lifting platform 14 is arranged outside the limiting rod 13;

[0053] The storage part 20 comprises a shell 21, the shell 21 is fixedly connected above the lifting platform 14, and a water passing pipe 22 is arranged in the shell 21, both ends of the water passing pipe 22 are arranged at the upper end of the shell 21 and the lower end of the lifting platform 14 respectively, a sealed box 24 is arranged in the inner cavity of the shell 21, and a high-voltage box 25 is connected to the left side of the sealed box 24;

[0054] The sealing part 30 comprises an extrusion film 32, the extrusion film 32 is arranged in the high-voltage box 25, and an expansion strip 33 is arranged inside the extrusion film 32;

[0055] The heat dissipation part 40 comprises a heat conduction pipe a41, the heat conduction pipe a41 is arranged outside the sealed box 24 and is sleeved on the outer ring of the water passing pipe 22, a heat conduction pipe b42 is fixedly connected in the inner cavity of the sealed box 24, a heat dissipation plate 44 is connected to the left side of the heat conduction pipe b42, and the left side of the heat dissipation plate 44 extends out of the shell 21;

[0056] The temperature generated by the operation of the transformer in the sealed box 24 is introduced into the water passing pipe 22 through the heat conduction pipe a41, the water passing pipe 22 heats the seawater in the inner cavity, the heated seawater rises upwards, the seawater below flows into the water passing pipe 22, and self-circulation heat dissipation is realized, and when the heat dissipation efficiency is insufficient, the heat dissipation plate 44 is used to dissipate heat for the heat conduction pipe b42.

[0057] It should be noted that the transformer of the wind power tower 11 is installed in the inner cavity of the sealed box 24, which is designed to facilitate subsequent maintenance and replacement by means of external transformer.

[0058] In this embodiment, the transformer and the shell 21 can be immersed in seawater or lifted above the sea level by controlling the lifting of the lifting platform 14, so that in the normal state, the transformer and the shell 21 are submerged in seawater to reduce the erosion of wind waves, and when maintenance is needed, the transformer is lifted to the sea surface to facilitate the maintenance of the wind power tower 11. When the shell 21 is submerged in seawater, the temperature generated by the operation of the transformer is transmitted to the heat conducting pipe a41 and the water pipe 22 through the heat conducting pipe b42, and the water pipe 22 transmits the heat to the seawater, which uses the principle of water rising after being heated to make the heated water flow out of the water pipe 22 from the top, and the cold seawater below fills into the water pipe 22, realizing a simple self-circulating cooling process and ensuring the cooling effect of the transformer. When the transformer is in high load operation and the water pipe 22 cannot bear the cooling work alone, the heat dissipation part 40 drives the gas in the heat conducting pipe b42 to flow, so that the gas enters the heat dissipation plate 44 and actively exchanges heat with the seawater, and then the cooled gas is transported back to the heat conducting pipe b42 for active and passive double cooling, ensuring the stability of the transformer operation. In order to ensure the sealing of the shell 21, high-pressure gas in the high-pressure box 25 is used to push the extruded membranes 32 to extrude and fit together, and the expansion strips 33 are used to fill the gaps between the extruded membranes 32, so as to ensure the sealing effect of the extruded membranes 32 and prevent seawater from entering the sealed box 24 to affect the transformer.

[0059] Secondly, please refer again to Figures 1 to 4 The upper end of the chassis 10 is fixedly connected with the wind power tower 11 on the left side, and the lower end of the rear side of the wind power tower 11 is electrically connected with the cable 12, the lower end of the cable 12 extends into the inner cavity of the shell 21, four limit rods 13 are arranged, which are distributed on the right side of the upper end of the chassis 10, and the lifting platform 14 is slidingly connected to the outer circle of the four groups of limit rods 13.

[0060] The upper end of the lifting platform 14 is fixedly connected with the pull rope 15 at four corners, the upper end of the pull rope 15 extends into the inner cavity of the limit rod 13, the inner cavity of the chassis 10 is fixedly installed with the hoist 16 at the lower end, the pull rope 15 penetrates through the limit rod 13 and the chassis 10 and is fixedly connected in the take-up reel of the hoist 16, and the inner cavity of the limit rod 13 is rotatably connected with the guide wheel 17 through the rotating shaft at the upper end, and the middle segment of the pull rope 15 is rollingly connected with the outer circle of the guide wheel 17.

[0061] It should be noted that the transformer in the wind power tower 11 is placed in the inner cavity of the sealed box 24 and is electrically connected with the wind power tower 11 through the cable 12, which is designed to facilitate subsequent maintenance and replacement by means of external transformer;

[0062] The cable 12 is externally provided with a protective sleeve to avoid damage caused by wind and waves to the cable 12.

[0063] The upper end of the limiting rod 13 is provided with a water scraping block in contact with the pulling rope 15, so that the water on the surface of the pulling rope 15 can be scraped off during the lifting and recovery of the pulling rope 15.

[0064] The lifting machine 16 is provided with two output shafts, and each group of output shafts is provided with a take-up reel, so that two groups of pulling ropes 15 can be driven to be wound and unwound simultaneously by one lifting machine 16, and the lifting machine 16 is internally provided with a waterproof motor and externally provided with a waterproof shell to avoid damage caused by liquid erosion to the lifting machine 16.

[0065] In this embodiment, the pulling rope 15 is driven to be wound and unwound by the forward and reverse operation of the lifting machine 16 during use, and the lifting platform 14 is lifted along the limiting rod 13 during the winding and unwinding of the pulling rope 15, and the lifting platform 14 drives the shell 21 and the transformer to be lifted synchronously, so that the transformer can be immersed in seawater to perform normal operation and heat dissipation and reduce the influence of wind and waves on the shell 21, or the transformer can be lifted out of the seawater when maintenance is needed, so that subsequent maintenance work is facilitated. During the lifting of the lifting platform 14, the guide wheel 17 guides the pulling rope 15 to ensure the stability of the sliding of the pulling rope 15 in the cavity of the limiting rod 13, avoid the deviation or jamming of the pulling rope 15, and affect the lifting effect of the lifting platform 14.

[0066] Secondly, please refer to Figures 5 to 8 The shell 21 is fixedly connected to the upper end of the lifting platform 14, and the water passing pipe 22 is provided with multiple groups and is uniformly distributed on the front and rear sides and the right side in the cavity of the shell 21, and the lower end inlet of the water passing pipe 22 penetrates the shell 21 and the lifting platform 14 and is arranged at the lower end of the lifting platform 14, and the upper end outlet of the water passing pipe 22 is arranged above the shell 21, and the upper end outlet and the lower end inlet of the water passing pipe 22 are both provided with a filter screen 23.

[0067] The sealing box 24 is fixedly connected to the middle part in the cavity of the shell 21, and a through hole is formed in the left upper end of the sealing box 24, and the high-voltage box 25 is fixedly connected to the left side of the through hole, and the left side of the high-voltage box 25 is in communication with the left side of the shell 21, and the cable 12 extends into the sealing box 24 through the shell 21 and the high-voltage box 25.

[0068] It should be noted that in the normal state, the lifting platform 14 and the shell 21 should be submerged below the sea level, and the shell 21 is arranged in the seawater, so as to dissipate heat from the transformer by using seawater, and to avoid the impact of sea waves on the shell 21 by being submerged in seawater.

[0069] The water pipe 22 is made of metal material with high thermal conductivity (for example, copper), so that the water pipe 22 can absorb the temperature generated by the operation of the transformer and transfer to the seawater, and the seawater in the water pipe 22 is heated and flows out from the upper end, while the lower end inlet is filled with cold seawater, realizing simple self-circulation cooling;

[0070] The parts of the shell 21, the sealing box 24 and the high-pressure box 25 in contact with the cable 12 are provided with multiple sealing layers to ensure the sealing effect of the device in seawater.

[0071] In this embodiment, after the shell 21 is immersed in seawater, the temperature generated by the operation of the transformer is transferred to the water pipe 22, and the water pipe 22 transfers the temperature to the seawater in the inner cavity. The heated seawater naturally rises due to the change in density, so that the cold seawater below flows into the lower end inlet of the water pipe 22, forming a natural circulation cooling system. The filter screen 23 is used to block impurities in the sea to prevent the water pipe 22 from being blocked by impurities in the seawater, ensuring the continuity and stability of the cooling process.

[0072] Secondly, please refer to Figures 7 to 10 The sealing part 30 also includes a support 31 fixedly connected to the inner cavity of the high-pressure box 25, and the outer circle of the support 31 is fixedly connected with four extrusion membranes 32, and the four extrusion membranes 32 are attached to the outer circle of the cable 12;

[0073] The sealing part 30 also includes a gas feeding ring 34 fixedly connected to the left side of the inner cavity of the sealing box 24, and the left end of the gas feeding ring 34 is provided with four outlets, and the four outlets are all communicated with four inflation strips 33, and the four inflation strips 33 are also in contact with the outer circle of the cable 12, and the four inflation strips 33 are arranged between the cable 12 and the extrusion membranes 32. The left side of the sealing box 24 is fixedly connected with a gas pump 35, and the lower end of the three-way pipe 36 is communicated with the outlet of the gas pump 35, and the two side outlets of the three-way pipe 36 are both fixedly connected with electric valves 37.

[0074] It should be noted that there is a gap between the inner wall of the high-pressure box 25 and the support 31, so that the gas fed into the high-pressure box 25 can simultaneously push the four extrusion membranes 32 to adhere to the outer circle of the cable 12 for sealing and isolation;

[0075] The gas pressure in the high-pressure box 25 should be greater than the water pressure of the seawater depth, so as to avoid the seawater from pressing the extrusion membranes 32 to relax the sealing of the cable 12 by water pressure;

[0076] The material of the expansion strip 33 is the same as that of the extrusion film 32, and is a high-elasticity material (for example, high-corrosion-resistant rubber, etc.). Before the extrusion film 32 is extruded, the expansion strip 33 is first controlled to expand, so that after the extrusion film 32 is extruded by the high-pressure gas, the extrusion film 32 can extrude the expansion strip 33 again to fill the gap between adjacent extrusion films 32, thereby improving the sealing effect.

[0077] The electric valve 37 is a high-tightness valve, which avoids the leakage of the gas pressure in the high-pressure box 25, thereby affecting the sealing effect.

[0078] In this embodiment, in order to avoid the seawater from penetrating into the sealing box 24, before the device is submerged in seawater, the electric valve 37 close to the expansion strip 33 is controlled to be opened, the air pump 35 fills the gas into the gas supply ring 34 through the three-way pipe 36, the gas supply ring 34 sends the high-pressure gas into the expansion strip 33 through the four groups of outlets, the expansion strip 33 expands outward and is attached to the outer circle of the cable 12, at this time, the electric valve 37 close to the high-pressure box 25 is controlled to be opened, the high-pressure gas enters the high-pressure box 25, the extrusion film 32 on the support 31 is pushed to be attached to the outer circle of the cable 12, and the expansion strip 33 is pushed to be attached to the cable 12 again, thereby filling the gap between adjacent extrusion films 32, achieving the sealing of the inner cavity of the sealing box 24, and avoiding the seawater from penetrating into the sealing box 24 to cause damage to the transformer. When the transformer needs to be lifted to the sea surface, the air pump 35 is only needed to be controlled to be reversed to extract the gas in the high-pressure box 25 and the gas supply ring 34, so that the extrusion film 32 and the expansion strip 33 return to the initial state, the sealing effect is released, and the subsequent maintenance and replacement of the transformer are facilitated.

[0079] Please refer to Figures 11 to 13 , the heat conduction pipe a41 is provided in multiple groups, is arranged in the inner cavity of the shell 21, is sleeved on the outer circle of the water passing pipe 22 located in the inner cavity of the shell 21, and is fixedly connected with the heat conduction pipe b42 and penetrates the sealing box 24;

[0080] The heat conduction pipe b42 is fixedly connected in the inner cavity of the sealing box 24, is a hollow structure, and is communicated with the air pipe 43 at both ends on the left side. The left ends of the two groups of air pipes 43 extend out of the sealing box 24 and are communicated with the heat dissipation plate 44. The heat dissipation plate 44 is fixedly connected in the inner cavity of the shell 21, and the left end of the heat dissipation plate 44 extends out of the shell 21. The inner cavity of the shell 21 is fixedly connected with the fan 45 at the lower end, and the inlet and outlet of the fan 45 are communicated on the left and right sides of the middle part of the front air pipe 43.

[0081] It should be noted that the heat conduction pipe a41 is a metal material pipe with high heat conduction performance (for example, copper), and a heat conduction coating (for example, silicone grease) is filled between the heat conduction pipe a41 and the outer circle of the water passing pipe 22, so as to ensure the heat transfer between the heat conduction pipe a41 and the water passing pipe 22;

[0082] The heat conduction pipe b42 is a plurality of U-shaped pipes arranged in groups, and the heat conduction pipe b42 should be attached to the core heat generating part (such as the outer side of the core and the winding) of the transformer and filled with a heat conduction coating (such as silicone grease), so that the heat generated during the operation of the transformer can be quickly transferred into the heat conduction pipe b42, and then transferred to the heat conduction pipe a41 and the water pipe 22 through the heat conduction pipe b42;

[0083] The left end of the heat conduction pipe b42 is provided with a trapezoidal cavity, the middle part is wide, and the upper and lower parts are relatively narrow. The wide part in the middle communicates with the air pipe 43, and is designed to ensure that the heat-exchanged air can flow into each group of pipes as evenly as possible, avoiding the control of the heat conduction pipe b42 in the middle part only, which affects the cooling effect of the upper and lower parts.

[0084] The heat dissipation plate 44 is a hollow plate with an S-shaped channel in the inner cavity (not shown in the figure, and this is a common technical structure in the prior art, which will not be described in detail here). The part of the left side of the heat dissipation plate 44 that protrudes out of the shell 21 is provided with a heat dissipation fin, and the part of the heat dissipation plate 44 where the heat dissipation fin is installed should be a high-thermal-conductivity material plate (such as copper). The air in the heat conduction pipe b42 can flow through the heat dissipation plate 44 driven by the fan 45, and the heat can be transferred to the seawater through the heat dissipation fin for active heat dissipation. In this way, the stability of the transformer operation can be improved by using both active and passive heat dissipation methods.

[0085] In this embodiment, when the passive heat dissipation of the water pipe 22 is not enough to cope with the high-load operation state of the transformer, the fan 45 will start to extract the hot air in the heat conduction pipe b42 through the front air pipe 43, and then make the hot air flow into the heat dissipation plate 44. When the hot air flows in the heat dissipation plate 44, the heat will be transferred to the seawater on the left side of the shell 21 through the heat dissipation fin, realizing the active dissipation of heat. The cooled air will flow into the heat conduction pipe b42 again through another air pipe 43, and the cycle of heat dissipation will continue. In this way, the heat dissipation efficiency of the transformer in the high-load operation state can be improved by using the active heat dissipation method, and the stability of the transformer operation can be ensured. In addition, the arrangement of the heat conduction pipe a41, the heat conduction pipe b42 and the heat dissipation plate 44 can also disperse the heat generated during the operation of the transformer to multiple components for heat dissipation, avoiding the concentration of heat, and further improving the heat dissipation effect.

[0086] Embodiment 2

[0087] A method for using a suspension type dry-type transformer for offshore wind power, which is suitable for any of the above-mentioned suspension type dry-type transformers for offshore wind power, comprising:

[0088] S1: sink into the sea, use the drive to lower the lifting platform 14, make the shell 21 and the transformer are lowered below sea level into the sea, at this time the temperature generated by the operation of the transformer will be transmitted to the heat pipe a41 in the heat pipe b42, and transmitted to the sea water through the water pipe 22, and the heated sea water will rise upwards, so that the sea water under the lifting platform 14 will fill into the water pipe 22, realizing simple self-circulating water cooling, coping with the temperature generated by the operation of the transformer under normal conditions;

[0089] S2: active cooling, when the transformer is running at high intensity, causing the water pipe 22 to be unable to cope with the heat dissipation demand, the heat dissipation part 40 will drive the gas in the heat pipe b42 to flow into the heat dissipation plate 44, and through the heat dissipation plate 44, the hot gas in the heat pipe b42 is in heat exchange with the sea water, and the temperature of the transformer operation is dissipated, realizing the operation of active cooling and self-circulating cooling at the same time, ensuring the efficiency of heat dissipation;

[0090] S3: maintenance operation, when the transformer needs to be maintained and repaired, drive the lifting platform 14 to rise and separate from the sea, at this time the transformer can be repaired without contacting the wind power tower 11, avoiding the need to disassemble the shell of the wind power tower 11 when maintaining the transformer, affecting the construction efficiency and intensity.

[0091] In this embodiment, in the use of the conventional state, the current generated by the wind power tower 11 will be introduced into the transformer through the cable 12, and then transmitted back to the energy storage part inside the wind power tower 11 through the transformer, the whole process of the transformer is placed outside the wind power tower 11, which is convenient for maintenance.

[0092] The working principle of the present application is that: when in use, the lifting machine 16 is operated in forward and reverse directions to drive the pull rope 15 to be retracted and released, thereby driving the lifting platform 14, the shell 21 and the transformer to be lifted, so that the transformer can be immersed in seawater for normal operation and heat dissipation, or lifted out of the seawater for maintenance when maintenance is needed. In order to avoid seawater from entering the sealed box 24, the expansion strip 33 is expanded to fit the outer circle of the cable 12 before the device is immersed in seawater, and then high-pressure gas is introduced into the high-pressure box 25 to push the extrusion film 32 to fit the outer circle of the cable 12, and the expansion strip 33 is pushed to fit the cable 12 again to fill the gap between adjacent extrusion films 32, thereby sealing the inner cavity of the sealed box 24. After the shell 21 is immersed in seawater, the temperature generated by the operation of the transformer is transmitted to the water pipe 22, and the water pipe 22 transmits the temperature to the seawater in the inner cavity. The heated seawater will naturally rise due to the change in density, so that the cold seawater below flows into the lower end inlet of the water pipe 22, forming a natural circulating heat dissipation system. If the passive heat dissipation of the water pipe 22 is not enough to cope with the high load operation state of the transformer, the fan 45 will start to extract hot air in the heat pipe b42 through the front air pipe 43, and the hot air will flow into the heat dissipation plate 44 to transfer heat to the seawater, realizing active heat dissipation. The cooled air will flow into the heat pipe b42 again through another set of air pipes 43 to realize circulating heat dissipation, thereby improving the heat dissipation efficiency of the transformer in the high load operation state by using active heat dissipation, and ensuring the stability of the operation of the transformer. The arrangement of the heat pipe a41, the heat pipe b42 and the heat dissipation plate 44 can also disperse the heat generated by the operation of the transformer to multiple components for heat dissipation, avoiding heat concentration, and further improving the heat dissipation effect.

[0093] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A floating dry-type transformer for offshore wind power, characterized in that: The utility model relates to a wind power tower cooling device, including: Chassis, the upper end of chassis is provided with wind power tower and limiting rod, limiting rod outside is provided with lifting platform; Storage part, storage part includes shell, shell fixedly connected above lifting platform, and the water pipe is set in shell, both ends of water pipe are placed in the upper end of shell and the lower end of lifting platform respectively, the inner chamber of shell is provided with sealed box, the left side of sealed box is connected with high pressure box; Sealing part, sealing part includes extrusion membrane, extrusion membrane is set in high pressure box, the position of high pressure box in extrusion membrane is provided with expansion strip; Heat dissipation part, heat dissipation part includes heat pipe a, heat pipe a is set in the outside of sealed box and is sleeved in the outer ring of water pipe, the inner chamber of sealed box is fixedly connected with heat pipe b, the left side of heat pipe b is connected with radiating plate, the left side of radiating plate is stretched out shell; Wherein, the temperature generated by transformer operation in sealed box can be introduced into water pipe through heat pipe a, the seawater in inner chamber is heated by water pipe, and the heated seawater rises upwards, so that the seawater below flows into water pipe, realizes self-circulation heat dissipation, and when the heat dissipation efficiency is insufficient, heat pipe b is radiated through radiating plate.

2. The floating dry-type transformer for offshore wind power generation according to claim 1, characterized by: The left side of the upper end of the chassis is fixedly connected with the wind power tower, and the lower end of the rear side of the wind power tower is electrically connected with the cable, the lower end of the cable extends into the inner chamber of the shell, the limiting rod is provided with four, which are distributed on the right side of the upper end of the chassis, and the lifting platform is slidingly connected to the outer ring of the four limiting rods.

3. The floating dry-type transformer for offshore wind power generation according to claim 2, characterized in that: The upper end of the lifting platform is fixedly connected with the pull rope, the upper end of the pull rope extends into the inner chamber of the limiting rod, the lower end of the inner chamber of the chassis is fixedly installed with the elevator, the pull rope penetrates through the limiting rod and the chassis and is fixedly connected with the take-up reel of the elevator, and the upper end of the inner chamber of the limiting rod is rotatably connected with the guide wheel, and the outer ring of the middle section of the pull rope is rotatably connected with the outer ring of the guide wheel.

4. The floating dry-type transformer for offshore wind power generation according to claim 3, characterized by: The shell is fixedly connected to the upper middle part of the lifting platform, the water pipe is provided with a plurality of groups, which are evenly distributed on the front and rear sides and the right side of the inner chamber of the shell, and the lower end inlet of the water pipe penetrates through the shell and the lifting platform and is placed at the lower end of the lifting platform, while the upper end outlet of the water pipe is placed above the shell, and the filter screen is arranged at the upper end outlet and the lower end inlet of the water pipe.

5. The floating dry-type transformer for offshore wind power generation according to claim 4, characterized in that: The sealed box is fixedly connected to the inner chamber of the shell, and a through hole is formed in the left upper end of the sealed box, the high pressure box is fixedly connected to the left side of the through hole, and the left side of the high pressure box is communicated with the left side of the shell, and the cable extends into the sealed box through the shell and the high pressure box.

6. The floating dry-type transformer for offshore wind power generation according to claim 5, characterized in that: The sealing part further includes a bracket, the bracket is fixedly connected in the inner chamber of the high pressure box, and the outer ring of the bracket is fixedly connected with four extrusion membranes, and the four extrusion membranes are attached to the outer ring of the cable.

7. The floating dry-type transformer for offshore wind power according to claim 6, characterized in that: The sealing part further includes a gas sending ring, the gas sending ring is fixedly connected to the inner chamber of the sealed box, and four outlets are formed in the left end of the gas sending ring, and the four outlets are communicated with the expansion strips, the four expansion strips are also in contact with the outer ring of the cable, and the four expansion strips are arranged between the cable and the extrusion membrane, the left side of the sealed box is fixedly connected with a gas pump, the lower end inlet of the three-way pipe is communicated with the outlet of the gas pump, and the two side outlets of the three-way pipe are fixedly connected with the electric valves.

8. The floating dry-type transformer for offshore wind power generation according to claim 7, characterized in that: The heat pipe a is provided with a plurality of groups, which are arranged in the inner chamber of the shell and sleeved with the outer ring of the water pipe in the inner chamber of the shell, and the heat pipe a is fixedly connected with the heat pipe b.

9. The floating dry-type transformer for offshore wind power according to claim 8, characterized in that: The heat conduction pipe b is fixedly connected in the inner cavity of the sealed box, the heat conduction pipe b is a hollow structure, and the left ends of the two groups of air pipes are communicated with the heat dissipation plates which are arranged outside the shell and extend out of the shell.

10. A method of use of a floating dry-type transformer for offshore wind power, characterized in that: The suspension type dry transformer for offshore wind power is suitable for any one of claims 1-9. S1: sinking into seawater, driving the lifting platform to descend when in use, so that the shell and the transformer are lowered below the sea level and enter the seawater, at this time, the temperature generated by the operation of the transformer is transmitted to the heat conduction pipe a through the heat conduction pipe b, and is transmitted to the seawater through the water pipe, and the heated seawater rises upward, so that the seawater below the lifting platform fills into the water pipe, realizing simple self-circulating water cooling and coping with the temperature generated by the operation of the transformer under the conventional state; S2: active heat dissipation, when the transformer is operated at high intensity, the water pipe cannot cope with the heat dissipation demand, the heat dissipation part drives the gas in the heat conduction pipe b to flow into the heat dissipation plate, and the heat conduction pipe b exchanges heat with the seawater through the heat dissipation plate, so as to dissipate the temperature of the transformer operation, realizing the operation of active heat dissipation and self-circulating heat dissipation at the same time, and guaranteeing the efficiency of heat dissipation; S3: maintenance operation, when the transformer needs to be maintained and repaired, the lifting platform is driven to ascend and is separated from the seawater, at this time, the transformer can be repaired without contacting the wind power tower, so that the shell of the wind power tower does not need to be disassembled when the transformer is maintained, and the construction efficiency and intensity are not affected.

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