Dry-type transformer for double-split photovoltaic power generation

Abstract

The invention relates to the technical field of transformers, in particular to a dry-type transformer for double-split photovoltaic power generation, which comprises a basic assembly, and the basic assembly comprises a three-phase column-type iron core and a coil winding arranged on each phase column in a sleeving manner; the forced air cooling assembly comprises a main air pipe arranged on one side of the lower clamping piece, air blowers are arranged on the two sides of one side of the main air pipe, and the air outlet ends of the air blowers communicate with the interior of the main air pipe. The forced air cooling assembly further comprises a lower sealing air guide structure, a middle sealing air guide structure and an upper sealing air guide structure. Rapid airflow is effectively formed in the annular space through the forced air cooling assembly, hot air gathered in the sound insulation housing is exhausted according to the Bernoulli principle in cooperation with the Laval nozzle and the variable-diameter horn pipe, the heat dissipation efficiency is improved, and therefore it is ensured that the environment temperature is appropriate when the transformer works, the annular space is exposed through the high-temperature linkage assembly, and the heat dissipation efficiency is improved. Time is gained for first-aid repair of workers, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a dry-type transformer used for double-split photovoltaic power generation. Background Art

[0002] A split-winding transformer refers to a multi-winding power transformer in which each phase consists of a high-voltage winding and two or more low-voltage windings with the same voltage and capacity. The normal power transmission of the split transformer is only carried out between the high and low voltage windings, and in the event of a fault, it has the function of limiting the short-circuit current; at the same time, the several branches in the split-winding transformer have the same capacity and equal or close rated voltages, and can operate individually or in parallel, and can bear the same or different loads; when the load or power supply connected to a low-voltage winding fails, the remaining low-voltage windings can still operate normally; and, since there is no electrical connection between the split windings, the magnetic coupling is relatively weak, there is a large impedance between the split branches, and the split branches should have the same impedance as the non-split windings.

[0003] Moreover, dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil; the cooling methods of dry-type transformers are divided into natural air cooling and forced air cooling. In natural air cooling, the transformer can operate continuously for a long time at rated capacity; in forced air cooling, the transformer output capacity can be increased by a certain proportion. Therefore, forced air cooling is suitable for intermittent overload operation or emergency overload operation. At the same time, due to the large increase in load loss and impedance voltage when forced air cooling is overloaded, it is not suitable for long-term continuous overload operation.

[0004] With the widespread promotion and application of photovoltaic panels, photovoltaic power stations have large power generation and a large number of solar panels. In order to improve the stability of power transmission, a large number of double-split dry-type transformers are often used in photovoltaic power stations. In addition, during the use of existing double-split dry-type transformers, since the split-winding transformer is a multi-winding power transformer, the internal winding heat dissipation ring gap is narrow, which leads to a large amount of heat often accumulating inside the double-split dry-type transformer, endangering the safety of transformer use. In addition, due to the current cooling and heat dissipation method of dry-type transformers, most of them only install simple cross-flow fans at the bottom, lack of guide devices, which makes it impossible for cold air to effectively enter the ring gap and form a fast airflow, which ultimately leads to low heat dissipation efficiency, easily leading to overheating, and further affecting the service life of the transformer.

[0005] Therefore, how to design a double-split dry-type transformer that can improve heat dissipation efficiency is a technical problem that current technicians need to solve. Summary of the invention

[0006] In order to solve the problem that cold air cannot effectively enter the annular gap and form a fast airflow in the existing double-split dry-type transformer, which ultimately leads to low heat dissipation efficiency, the present invention provides a dry-type transformer for double-split photovoltaic power generation to solve the above problem.

[0007] To achieve the above object, the present invention provides a dry-type transformer for double-split photovoltaic power generation, comprising: A basic component and a forced air cooling component; the basic component includes a three-phase column core, an upper clamp clamped at the upper yoke of the core and a lower clamp clamped at the lower yoke of the core, and a coil winding sleeved on each phase column, each of the coil windings is split into two upper and lower independent windings separated from each other, each of the independent windings includes a low-voltage winding in the inner circle and a high-voltage winding in the outer circle, and a plurality of vertical struts are evenly arranged in the annular gap between the low-voltage winding and the high-voltage winding; the forced air cooling component includes three sealed air guide structures at the lower, middle and upper positions and a plurality of branch pipes installed on the top of the main air duct, and a main air duct arranged on one side of the lower clamp; blowers are arranged on both sides of one side of the main air duct, and the air outlet ends of the blowers are connected to the inside of the main air duct, the air inlet end of the blower is connected to an air filter, and the outlet end of the branch pipe points to the coil winding; wherein, there are three groups of the sealed air guide structures at the lower position, which are respectively arranged between the bottom end of the coil winding and the lower clamp.

[0008] Preferably, the sealing air-guiding structure at the bottom of each group includes a lower sealing disk mounted under the phase column, and the four corners of the bottom of the lower sealing disk are threadedly connected with support bolts, and the bottom ends of the support bolts respectively contact the top of the lower clamp, and a plurality of support blocks are evenly installed around the top of the lower sealing disk, and the tops of the support blocks respectively contact the bottom ends of the coil windings.

[0009] Preferably, a ring is installed around the side of the lower sealing disk, and the combination of the lower sealing disk, the support block, the ring and the support bolt is divided into two from the middle to form a detachable two-petal structure; a groove is opened in the middle of the support block, and a duct is installed on the outer side of one of the support blocks in each group of the sealed air-guiding structures, and is connected with the internal groove, and the outer port of the duct is connected with the main air duct through a pipeline; there are three groups of the sealed air-guiding structures in the middle, which are respectively arranged between the upper and lower independent windings; each group of the sealed air-guiding structures in the middle includes a plurality of support blocks evenly surrounding the middle of the core phase column, the top of the support block is respectively in contact with the bottom of the upper independent winding, and the bottom of the support block is respectively in contact with the top of the lower independent winding.

[0010] Preferably, a groove 2 is provided in the middle of the support block 2, and a conduit 2 is installed on the outer side of one of the support blocks 2 in each group of the sealed air-guiding structures, and is connected to the groove 2 inside the conduit, and the outer port of the conduit 2 is connected to an auxiliary air duct 1, and the outer port of the auxiliary air duct 1 is connected to a Laval nozzle 1; each group of the sealed air-guiding structures in the middle also includes a ring 2 set between the upper and lower two independent windings, and a plurality of slide bars 1 slidingly fitted around the inner part of the ring 2, and the slide bars 1 are respectively installed on the top of the side of the high-voltage winding below, and the ring 2 is provided with a conduit 2 for accommodating the conduit 2. The notch one; there are three groups of the sealing air guide structure at the top, which are respectively arranged between the top of the coil winding and the upper clamp; each group of the sealing air guide structure at the top includes an upper sealing disk sleeved on the core phase column, and the four corners of the top of the upper sealing disk are threadedly connected with supporting bolts two, and the tops of the supporting bolts two respectively contact the bottom of the upper clamp, and a plurality of supporting blocks three are evenly installed around the bottom of the upper sealing disk, and the bottoms of the supporting blocks three respectively contact the top of the coil winding, and the combination of the upper sealing disk and the supporting block three is divided into two from the middle to form a detachable two-petal structure.

[0011] Preferably, it also includes a high-temperature linkage component, which includes a gear rotatably connected to each side of the high-voltage winding above; a groove three is opened in the middle of the support block three, and a conduit three is installed on the outer side of one of the support blocks three in each group of the sealed air-guiding structures, and is connected to the internal groove three, the outer port of the conduit one is connected to the auxiliary air duct two, and the outer port of the auxiliary air duct two is connected to the Rafale nozzle two; each group of the sealed air-guiding structure also includes a ring three sleeved on the outside of the upper sealing disk, and a plurality of slide bars two slidably fitted around the inside of the ring three, the slide bars two are respectively installed on the top of the side of the high-voltage winding above, and the ring three is provided with a notch two for accommodating the conduit three; one side of the gear is meshed with a rack two, the top end of the rack two is correspondingly connected to the ring three, and the bottom end of the rack two is correspondingly connected to the ring two.

[0012] Preferably, the other side of the gear is meshed and connected with a rack 1, a support arm is installed in the middle of one side of the rack 1, one end of the support arm is connected to a piston rod, the bottom end of the piston rod is installed with a piston ring, the outside of the piston ring is matched with a cylinder body, the cylinder body is respectively installed on the side of the high-voltage winding above, grooves are opened above the tube wall of the cylinder body along its axial direction, the support arm is respectively matched with the inside of the groove, and the upper and lower ports of the cylinder body are installed with end covers; a connecting pipe is installed at the end cover below, one end of the connecting pipe is connected to the inside of the cylinder body, and the other end of the connecting pipe is connected to a heat-receiving bottle, which is respectively arranged inside the conduit 2; the inside of the heat-receiving bottle is filled with a liquid that expands when heated.

[0013] Preferably, a sound insulation and heat dissipation component is also included, and a base is provided on both sides of the bottom of the lower clamp. The sound insulation and heat dissipation component includes an upper cover plate arranged on the top of the upper clamp, a lower cover plate arranged between the lower clamp and the base, side covers arranged on both sides, and edge covers arranged on both sides; wherein, sound insulation felt is installed on the inner sides of the upper cover plate, the lower cover plate, the side cover plate, and the edge cover plate, the top of the side cover plate is respectively connected to the two sides of the upper cover plate, the bottom of the side cover plate is respectively connected to the two sides of the lower cover plate, the top of the side cover plate is respectively connected to the two sides of the upper cover plate, the bottom of the side cover plate is respectively connected to the two sides of the lower cover plate, and the contact edges between adjacent side cover plates and edge cover plates are connected to each other.

[0014] Preferably, the sound insulation and heat dissipation component also includes a lower reducer horn tube corresponding to each coil winding position and installed in the middle of the side cover plate on one side, the large diameter end of the lower reducer horn tube extends toward the corresponding coil winding, and the small diameter end of the lower reducer horn tube corresponds to passing through the side cover plate, and the Laval nozzle 1 is respectively installed at the small diameter inside the lower reducer horn tube; the sound insulation and heat dissipation component also includes an upper reducer horn tube corresponding to each coil winding position and installed above the side cover plate on one side, the large diameter end of the upper reducer horn tube extends toward the corresponding coil winding, and the small diameter end of the upper reducer horn tube corresponds to passing through the side cover plate, and the Laval nozzle 2 is respectively installed at the small diameter inside the upper reducer horn tube.

[0015] Preferably, the basic component also includes a lifting ring installed on the top of the upper clamp, and the top of the lifting ring passes through the upper cover plate; the basic component also includes a low-voltage connection terminal and a high-voltage connection terminal corresponding to each coil winding position and installed on one side of the upper clamp, each of the low-voltage connection terminals is electrically connected to the low-voltage winding, and each of the high-voltage connection terminals is electrically connected to the high-voltage winding, and the low-voltage connection terminal and the high-voltage connection terminal are both arranged above the upper cover plate.

[0016] Preferably, the sound insulation and heat dissipation assembly also includes an upper rubber shock-absorbing pad and a lower rubber shock-absorbing pad, the upper rubber shock-absorbing pad is arranged between the upper cover plate and the upper clamp, the lower rubber shock-absorbing pad is arranged between the lower cover plate and the lower clamp, and the base is correspondingly installed on both sides of the bottom of the lower cover plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention purifies the external air and then introduces it into the annular gap of the coil winding. At this time, the cold air will flow upward rapidly under pressure, thereby taking away the heat in the annular gap. When the airflow passes through the interval at the splitting point, part of the airflow is discharged outward through the second conduit, the first auxiliary air duct, and the first Laval nozzle under pressure, and then the remaining part of the airflow will continue to rise and be discharged through the third conduit, the second auxiliary air duct, and the second Laval nozzle. By using the first Laval nozzle and the second Laval nozzle, plus the air pressure, the speed of the airflow is increased, and the efficiency of heat dissipation and cooling is improved, thereby avoiding the problem in the prior art that only a fan is used, which causes the cold air to be unable to effectively form a rapid airflow in the annular gap of the coil winding, and ultimately leads to poor heat dissipation efficiency.

[0018] 2. When the forced air cooling component cannot work normally, the present invention monitors the abnormal increase in temperature in the annular gap through the temperature sensor and sends an alarm to the control center. At this time, the inside of the conduit 2 will also heat up because it is connected to the annular gap. When the heated bottle is heated, the material filled inside it will expand due to the heat, thereby pouring into the cylinder body and pushing the piston ring to move. Then the piston rod will drive the rack 1 to move, and through the transmission of the gear, the rack 2 will eventually make the enclosure 2 and the enclosure 3 slide down, thereby exposing the annular gap, achieving the purpose of natural heat dissipation and cooling, winning time for the staff to repair, and improving the safety of use.

[0019] 3. In order to improve the convenience and applicability of use, this equipment will use the sound insulation cover in the sound insulation and heat dissipation assembly to reduce the transmission intensity of noise. When the sound insulation and heat dissipation assembly is used, its internal temperature will inevitably rise due to accumulation. Through the cooperation between Laval nozzle 1 and the lower reducer horn tube, and Laval nozzle 2 and the upper reducer horn tube, when Laval nozzle 1 and Laval nozzle 2 spray hot air, according to Bernoulli's principle, the pressure will decrease where the flow rate is large, thereby forming a low-pressure environment at the small-diameter ends of the lower reducer horn tube and the upper reducer horn tube. Through the pressure difference, the hot air accumulated inside the sound insulation and heat dissipation assembly will be "sucked out" of the interior of the sound insulation and heat dissipation assembly, thereby ensuring the appropriate ambient temperature when the transformer is working. In addition, the design also has the advantages of simple structure and low cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the assembly of the forced air cooling component and the high temperature linkage component of the present invention.

[0021] Figure 2 It is a schematic diagram of the basic component structure of the present invention.

[0022] Figure 3 for Figure 1 Schematic diagram of another perspective of the structure.

[0023] Figure 4It is a schematic diagram of the cooperation between the forced air cooling component and the iron core of the present invention.

[0024] Figure 5 for Figure 4 Schematic diagram of another perspective of the structure.

[0025] Figure 6 Schematic diagram of the lower sealed air guide structure in an embodiment of the present invention.

[0026] Figure 7 Schematic diagram of the intermediate sealing air guide structure in an embodiment of the present invention.

[0027] Figure 8 Schematic diagram of the upper sealed air guide structure in an embodiment of the present invention.

[0028] Fig. 9 It is a schematic diagram of the assembly of the high temperature linkage component of the present invention.

[0029] Fig.10 It is a schematic diagram of the high temperature linkage assembly structure of the present invention.

[0030] Fig.11 It is a schematic diagram of the internal structure of the cylinder body of the present invention.

[0031] Fig.12 It is a schematic diagram of the sound insulation and heat dissipation component of the present invention.

[0032] Fig.13 for Fig.12 Schematic diagram of another perspective of the structure.

[0033] Fig.14 It is a schematic diagram of the internal structure of the sound insulation and heat dissipation component of the present invention.

[0034] Fig.15 It is a schematic diagram of assembling the first Laval nozzle and the second Laval nozzle of the present invention.

[0035] Among them, 1. Basic components; 101. Iron core; 102. Coil winding; 103. Stay; 104. Upper clamp; 105. Lower clamp; 106. Base; 107. Lifting ring; 108. Low-voltage outlet; 109. High-voltage outlet; 2. Forced air cooling components; 201. Main air duct; 202. Blower; 203. Air filter; 204. Branch pipe; 205. Lower sealing plate; 206. Support block 1; 207. Conduit 1; 208. Ring 1; 209. Support bolt 1; 210. Support block 2; 211. Conduit 2; 212. Auxiliary air duct 1; 213. Laval nozzle 1; 214. Ring 2; 215. Sliding bar 1; 216. Upper sealing plate; 21 7. Support block three; 218. Conduit three; 219. Auxiliary air duct two; 220. Rafale nozzle two; 221. Circle three; 222. Slide two; 223. Support bolt two; 3. High-temperature linkage assembly; 301. Cylinder body; 302. End cover; 303. Piston ring; 304. Piston rod; 305. Heat-receiving bottle; 306. Slot; 307. Support arm; 308. Rack one; 309. Gear; 310. Rack two; 4. Sound insulation and heat dissipation assembly; 401. Upper cover; 402. Lower cover; 403. Side cover; 404. Side cover; 405. Upper rubber shock-absorbing pad; 406. Lower rubber shock-absorbing pad; 407. Lower reducer horn; 408. Upper reducer horn. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example: like Figure 1-15 As shown, the embodiment of the present invention provides a dry-type transformer for double-split photovoltaic power generation, specifically referring to Figure 2, which includes a basic component 1, which includes a three-phase column core 101 and a coil winding 102 mounted on each phase column. The coil winding 102 is split into two upper and lower independent windings separated from each other. Each independent winding includes a low-voltage winding in an inner circle and a high-voltage winding in an outer circle. A plurality of vertical struts 103 are evenly arranged in the annular gap between the low-voltage winding and the high-voltage winding. In actual use, the annular gap is used as a heat dissipation channel. At the same time, in order to ensure the stable operation of the heat dissipation mechanism, a temperature sensor is usually arranged in the annular gap. The basic component 1 also includes an upper clamp 104 clamped at the upper yoke of the core 101, and a lower clamp 105 clamped at the lower yoke of the core 101. Bases 106 are arranged on both sides of the bottom of the lower clamp 105. The above structure belongs to the most basic and common structure of a double-split transformer, and its specific connection technical means are not repeated here.

[0038] Specifically, it also includes a forced air cooling component 2.

[0039] In this embodiment, reference Figure 1 The forced air cooling component 2 includes a main air duct 201 arranged on one side of the lower clamp 105, and blowers 202 are arranged on both sides of one side of the main air duct 201, and the air outlet ends of the blowers 202 are connected to the inside of the main air duct 201, which are used to guide external cold air to the coil winding 102.

[0040] The forced air cooling assembly 2 also includes three sealed air guide structures at the bottom, middle and top, which are used to make the introduced cold air flow faster in the annular gap of the coil winding 102 to improve the cooling efficiency.

[0041] There are three sets of lower sealed air guide structures, which are respectively arranged between the bottom end of the coil winding 102 and the lower clamp 105, and are used to guide external cold air into the annular gap.

[0042] In this embodiment, reference Figure 3-6 Each group of lower sealing air guide structures includes a lower sealing disk 205 sleeved under the phase column, and the four corners of the bottom of the lower sealing disk 205 are threadedly connected with support bolts 209, and the bottom ends of the support bolts 209 respectively contact the top of the lower clamp 105, and a plurality of support blocks 206 are evenly installed around the top of the lower sealing disk 205, and the tops of the support blocks 206 respectively contact the bottom ends of the coil windings 102 to prevent the coil windings 102 from sinking.

[0043] A ring 208 is installed around the side of the lower sealing disk 205. The combination of the lower sealing disk 205, the support block 206, the ring 208 and the support bolt 209 is divided into two from the middle to form a detachable two-petal structure, which is easy to install and maintain. Among them, the ring 208 is used to seal the bottom end of the coil winding 102 to prevent leakage when cold air is introduced into the annular gap.

[0044] A groove 1 is provided in the middle of the support block 206 to facilitate the diversion of cold air. A duct 207 is installed on the outer side of a support block 206 in each group of lower sealed air guide structures and is connected to the internal groove 1. The outer port of the duct 207 is connected to the main air duct 201 through a pipeline.

[0045] In this embodiment, reference Figure 3-5 There are three groups of intermediate sealed air guide structures, which are respectively arranged between the upper and lower independent windings.

[0046] Specific reference Figure 7 Each set of intermediate sealed air guide structures includes a plurality of support blocks 210 uniformly surrounding the middle of the phase column of the core 101. The tops of the support blocks 210 correspond to the bottom ends of the upper independent windings, and the bottoms of the support blocks 210 correspond to the top ends of the lower independent windings, which are used to support the upper and lower independent windings. On the one hand, the stability of the coil winding 102 is maintained to achieve a double split effect. On the other hand, the remaining gap can also improve the heat dissipation efficiency.

[0047] Furthermore, a groove 2 is provided in the middle of the support block 210 to facilitate the diversion and flow of the airflow. A duct 211 is installed on the outer side of a support block 210 in each group of intermediate sealed air guide structures and is connected to the internal groove 2. The outer ports of the duct 211 are connected to the auxiliary air duct 1 212, and the outer ports of the auxiliary air duct 1 212 are connected to the Laval nozzle 1 213. When cold air is injected into the annular gap, a high-pressure environment is formed inside, thereby squeezing the hot air out of the annular gap. The above structure is to guide out part of the hot air to ensure the heat dissipation efficiency.

[0048] Furthermore, each set of intermediate sealed air-guiding structures also includes a second ring 214 arranged between the upper and lower independent windings, and a plurality of slide bars 215 slidingly fitted around the inside of the second ring 214. The slide bars 215 are respectively installed on the top of the side of the lower high-voltage winding to prevent leakage of high-pressure air, thereby reducing the pressure in the annular gap and hindering the dissipation of internal hot air. A notch 1 is provided on the second ring 214 for accommodating the second conduit 211.

[0049] In this embodiment, reference Figure 3-5 There are three groups of sealed air guide structures at the top, which are respectively arranged between the top of the coil winding 102 and the upper clamp 104.

[0050] Specifically, refer to Figure 8Each group of upper sealing air guide structures includes an upper sealing disk 216 sleeved on the upper phase column of the iron core 101, and the four corners of the top of the upper sealing disk 216 are threadedly connected with supporting bolts 223, and the tops of the supporting bolts 223 respectively contact the bottom of the upper clamp 104, and a plurality of supporting blocks 3 217 are evenly installed around the bottom of the upper sealing disk 216, and the bottoms of the supporting blocks 3 217 respectively contact the top of the coil winding 102. The combination of the upper sealing disk 216 and the supporting blocks 3 217 is divided into two from the middle to form a detachable two-petal structure, which is used to support the top of the coil winding 102. After cooperating with the supporting bolts 1 209 below, the coil winding 102 can be firmly fixed on the iron core 101 to prevent shaking.

[0051] Furthermore, a groove three is opened in the middle of the support block three 217, which is also convenient for the diversion and flow of airflow. A duct three 218 is installed on the outer side of a support block three 217 in each group of upper sealed air guide structures and is connected with the internal groove three. The outer port of the duct one 207 is connected with the auxiliary air duct two 219, and the outer port of the auxiliary air duct two 219 is connected with the Rafale nozzle two 220. Similarly, when cold air is injected into the annular gap, a high-pressure environment will be formed inside it, thereby squeezing the hot air out of the annular gap. The above structure is to guide out the remaining part of the hot air to ensure the heat dissipation efficiency.

[0052] Furthermore, each group of upper sealed air-guiding structures also includes a ring three 221 mounted on the outside of the upper sealing disk 216, and a plurality of slide bars 222 slidably fitted around the inside of the ring three 221. The slide bars 222 are respectively installed on the top of the side of the upper high-voltage winding. The ring three 221 is provided with a notch two for accommodating the conduit three 218 to avoid the dissipation of high-pressure gas, ensure the flow rate, and stabilize the heat dissipation efficiency.

[0053] In this embodiment, reference Figure 9-11 , and also includes a high-temperature linkage component 3, which includes a gear 309 rotatably connected to the side of each upper high-voltage winding, and one side of the gear 309 is meshed with a rack 2 310, the top end of the rack 2 310 is correspondingly connected to the ring 3 221, and the bottom end of the rack 2 310 is correspondingly connected to the ring 2 214.

[0054] The other side of the gear 309 is meshedly connected with a rack 308, and a support arm 307 is installed in the middle of one side of the rack 308. One end of the support arm 307 is connected to a piston rod 304, and a piston ring 303 is installed at the bottom end of the piston rod 304. The outside of the piston ring 303 is matched with a cylinder body 301, and the cylinder bodies 301 are respectively installed on the side surfaces of the upper high-voltage winding. Slots 306 are opened on the upper wall of the cylinder body 301 along its axial direction, and the support arms 307 are respectively matched with the inside of the slots 306, and end covers 302 are installed on the upper and lower ports of the cylinder body 301.

[0055] The lower end cover 302 is provided with a connecting pipe, one end of which is connected to the interior of the cylinder body 301 , and the other end of which is connected to a heating bottle 305 , which is respectively arranged inside the second conduit 211 .

[0056] The interior of the heated bottle 305 is filled with a liquid that easily expands when heated, including but not limited to kerosene and mercury.

[0057] In this embodiment, when the forced air cooling component 2 cannot work normally, the temperature sensor detects that the temperature in the annular gap rises abnormally. At this time, the inside of the conduit 211 is connected to the annular gap, so the inside thereof will also heat up. When the heated bottle 305 is heated, the material filled therein will expand due to the heat, thereby pouring into the cylinder body 301 and pushing the piston ring 303 to move, and then the piston rod 304 will drive the rack 1 308 to move, and through the transmission of the gear 309, the rack 2 310 will finally make the ring 2 214 and the ring 3 221 slide down, thereby exposing the annular gap, achieving the purpose of natural heat dissipation and cooling, and improving the safety of use.

[0058] In this embodiment, reference Figure 12-15 , and also includes a sound insulation and heat dissipation component 4, which includes an upper cover plate 401 arranged on the top of the upper clamp 104, a lower cover plate 402 arranged between the lower clamp 105 and the base 106, side covers 403 arranged on both sides, and side covers 404 arranged on both sides.

[0059] Among them, sound insulation felt is installed on the inner sides of the upper cover plate 401, the lower cover plate 402, the side cover plate 403 and the edge cover plate 404. The top of the side cover plate 403 is connected to the two sides of the upper cover plate 401 respectively, the bottom of the side cover plate 403 is connected to the two sides of the lower cover plate 402 respectively, the top of the side cover plate 404 is connected to the two sides of the upper cover plate 401 respectively, the bottom of the side cover plate 404 is connected to the two sides of the lower cover plate 402 respectively, and the contact edges between adjacent side cover plates 403 and edge cover plates 404 are connected to each other.

[0060] In this embodiment, the sound insulation and heat dissipation component 4 can reduce the propagation of noise to the greatest extent when the transformer is in use, thereby improving the applicability and also playing a certain protective role.

[0061] Furthermore, the sound insulation and heat dissipation assembly 4 also includes a lower reducing horn tube 407 corresponding to the position of each coil winding 102 and installed in the middle of a side cover plate 403. The large diameter end of the lower reducing horn tube 407 extends toward the corresponding coil winding 102, and the small diameter end of the lower reducing horn tube 407 passes through the side cover plate 403. The Laval nozzles 213 are respectively installed at the small diameter inside the lower reducing horn tube 407.

[0062] The sound insulation and heat dissipation assembly 4 also includes an upper reducer horn tube 408 corresponding to the position of each coil winding 102 and installed above a side cover plate 403. The large diameter end of the upper reducer horn tube 408 extends toward the corresponding coil winding 102, and the small diameter end of the upper reducer horn tube 408 passes through the side cover plate 403. The Rafale nozzles 220 are respectively installed at the small diameter positions inside the upper reducer horn tube 408.

[0063] In this embodiment, when the sound insulation and heat dissipation component 4 is used, its internal temperature will inevitably rise due to accumulation, and through the cooperation between the Laval nozzle 213 and the lower reducing horn tube 407, and the Laval nozzle 220 and the upper reducing horn tube 408, when the Laval nozzle 213 and the Laval nozzle 220 spray hot air, according to the Bernoulli principle, the pressure will decrease where the flow rate is large, thereby forming a low-pressure environment at the small-diameter ends of the lower reducing horn tube 407 and the upper reducing horn tube 408. Through the pressure difference, the hot air accumulated inside the sound insulation and heat dissipation component 4 will be "sucked out" of the interior of the sound insulation and heat dissipation component 4, thereby ensuring the appropriate ambient temperature when the transformer is working.

[0064] Furthermore, the basic component 1 also includes a lifting ring 107 installed on the top of the upper clamp 104, and the top of the lifting ring 107 corresponds to passing through the upper cover 401. It also includes a low-voltage connection terminal 108 corresponding to the position of each coil winding 102 and installed on one side of the upper clamp 104. Each low-voltage connection terminal 108 is electrically connected to the low-voltage winding and is located above the upper cover 401. It also includes a high-voltage connection terminal 109 corresponding to the position of each coil winding 102 and installed on the other side of the upper clamp 104. Each high-voltage connection terminal 109 is electrically connected to the high-voltage winding and is located above the upper cover 401.

[0065] In this embodiment, the electrical connection technology between the low voltage connection terminal 108, the high voltage connection terminal 109 and the coil winding 102 is common knowledge in the art, and thus will not be described in detail here.

[0066] Furthermore, the forced air cooling component 2 also includes an air filter 203 connected to the air inlet end of the blower 202, and the air filter 203 is arranged on the outside of the side cover plate 403, and also includes a plurality of branch pipes 204 installed on the top of the main air duct 201, and the outlet end of the branch pipe 204 points to the coil winding 102, which is used for the purpose of cooling and dissipating the outer surface of the coil winding 102.

[0067] Furthermore, the sound insulation and heat dissipation assembly 4 also includes an upper rubber shock-absorbing pad 405, which is arranged between the upper cover plate 401 and the upper clamp 104, and also includes a lower rubber shock-absorbing pad 406, which is arranged between the lower cover plate 402 and the lower clamp 105. The base 106 is correspondingly installed on both sides of the bottom of the lower cover plate 402. Through the shock-absorbing pad design, the propagation of noise can be further suppressed, which is beneficial to improving the noise reduction level of the equipment.

[0068] When the present solution is working, the blower 202 works, purifies the outside air through the air filter 203 and introduces it into the main air duct 201, and then passes through the diversion of the conduit 1 207, so that the cold air enters the annular gap of the coil winding 102. At this time, the cold air will flow upward rapidly under pressure, thereby taking away the heat in the annular gap. When the airflow passes through the interval at the split point, part of the airflow enters the conduit 2 211 through the groove 2 under the action of pressure, and then passes through the auxiliary air duct 1 212 and the Laval nozzle 1 213 to be discharged to the outside, and then the remaining part of the airflow will continue to rise, and under the guidance of the groove 3, enter the conduit 3 218, thereby passing ... The air is discharged through the air duct 219 and the Laval nozzle 220. The air is discharged through the Laval nozzle 1 213 and the Laval nozzle 220, and the air pressure is added to increase the speed of the air flow, and the efficiency of heat dissipation and cooling. This avoids the problem in the prior art that only the fan is used, which causes the cold air to be unable to effectively form a fast airflow in the annular gap of the coil winding 102, and ultimately leads to poor heat dissipation efficiency. Further, when the forced air cooling component 2 cannot work normally, the temperature sensor detects that the temperature in the annular gap is abnormally increased, and an alarm is sent to the control center. At the same time, the inside of the duct 211 is connected to the annular gap, so the inside thereof will also heat up. When the heated bottle 305 is heated, the material filled inside it will expand due to the heat, and thus flow into the cylinder body 301 and push the piston ring 303 to move, and then the piston rod 304 will drive the rack 1 308 to move, and through the transmission of the gear 309, the rack 2 310 will finally make the ring 2 214 and the ring 3 221 slide down, so that the annular gap is exposed, achieving the purpose of natural heat dissipation and cooling, winning time for the staff to repair, and improving the safety of use. Furthermore, in order to improve the convenience and applicability of use, the device will use the sound insulation cover in the sound insulation and heat dissipation component 4 to reduce the transmission intensity of noise, and when the sound insulation and heat dissipation component is used 4, its internal temperature will inevitably rise due to the accumulation, and through the cooperation between Laval nozzle 213 and the lower reducing horn tube 407, Laval nozzle 220 and the upper reducing horn tube 408, when Laval nozzle 213 and Laval nozzle 220 spray hot air, according to Bernoulli's principle, the pressure will decrease where the flow rate is large, thereby forming a low-pressure environment at the small-diameter ends of the lower reducing horn tube 407 and the upper reducing horn tube 408. Through the pressure difference, the hot air accumulated inside the sound insulation and heat dissipation component 4 will be "sucked out" of the interior of the sound insulation and heat dissipation component 4, thereby ensuring the appropriate ambient temperature when the transformer is working.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry-type transformer for double-split photovoltaic power generation, characterized in that: include: A base assembly (1) and a forced air cooling assembly (2); The basic assembly comprises a three-phase column-type iron core (101), an upper clamp (104) clamped at an upper yoke of the iron core (101), and a lower clamp (105) clamped at a lower yoke of the iron core (101), and a coil winding (102) sleeved on each phase column, each of the coil windings (102) being split into two upper and lower independent windings spaced apart, each of the independent windings comprising a low-voltage winding in an inner circle and a high-voltage winding in an outer circle, and a plurality of vertical struts (103) being evenly arranged in an annular gap between the low-voltage winding and the high-voltage winding; The forced air cooling component (2) comprises three sealed air guide structures at the bottom, middle and top, and a plurality of branch pipes (204) installed at the top of the main air duct (201), and the main air duct (201) is arranged on one side of the lower clamp (105); blowers (202) are arranged on both sides of one side of the main air duct (201), and the air outlet ends of the blowers (202) are connected to the inside of the main air duct (201), the air inlet end of the blower (202) is connected to an air filter (203), and the outlet ends of the branch pipes (204) point to the coil winding (102); wherein, there are three groups of the sealed air guide structures at the bottom, which are respectively arranged between the bottom end of the coil winding (102) and the lower clamp (105).

2. A dry-type transformer for double-split photovoltaic power generation according to claim 1, characterized in that: The sealing air guide structure at the bottom of each group includes a lower sealing disk (205) sleeved under the phase column, and the four corners of the bottom of the lower sealing disk (205) are threadedly connected with support bolts (209), and the bottom ends of the support bolts (209) respectively contact the top of the lower clamp (105), and a plurality of support blocks (206) are evenly installed around the top of the lower sealing disk (205), and the tops of the support blocks (206) respectively contact the bottom ends of the coil windings (102).

3. A dry-type transformer for double-split photovoltaic power generation according to claim 2, characterized in that: A ring (208) is installed around the side of the lower sealing disc (205), and the assembly of the lower sealing disc (205), the supporting block (206), the ring (208) and the supporting bolt (209) is divided into two parts from the middle to form a detachable two-piece structure; A groove one is provided in the middle of each support block one (206); a conduit one (207) is installed on the outer side of each support block one (206) in each group of the sealed air guide structures, and the conduit one (207) is connected to the groove one inside the support block one (206); and the outer port of the conduit one (207) is connected to the main air duct (201) through a pipeline; There are three groups of sealed air guide structures in the middle, which are respectively arranged between the upper and lower independent windings; The sealed air guide structure in the middle of each group includes a plurality of support blocks 2 (210) uniformly surrounding the middle of the phase column of the core (101), the top of the support block 2 (210) respectively contacts the bottom of the independent winding above, and the bottom of the support block 2 (210) respectively contacts the top of the independent winding below.

4. A dry-type transformer for double-split photovoltaic power generation according to claim 3, characterized in that: A groove 2 is provided in the middle of each support block 2 (210); a conduit 2 (211) is installed on the outer side of one of the support blocks 2 (210) in each group of the middle sealed air guide structures, and the conduit 2 (211) is connected to the inner groove 2 of the support block 2 (210); the outer port of the conduit 2 (211) is connected to an auxiliary air duct 1 (212), and the outer port of the auxiliary air duct 1 (212) is connected to a Laval nozzle 1 (213); The sealed air guide structure in the middle of each group also includes a second enclosure (214) sleeved between the upper and lower independent windings, and a plurality of first slide bars (215) slidably fitted inside the second enclosure (214) for a circle, the first slide bars (215) being respectively mounted on the top of the side of the lower high-voltage winding, and a notch first for accommodating the second conduit (211) is provided on the second enclosure (214); There are three groups of the sealing air guide structures at the top, which are respectively arranged between the top end of the coil winding (102) and the upper clamp (104); The sealing air guide structure at each group includes an upper sealing disk (216) sleeved on the phase column of the iron core (101), and the four corners of the top of the upper sealing disk (216) are threadedly connected with supporting bolts 2 (223), and the top ends of the supporting bolts 2 (223) respectively contact the bottom of the upper clamp (104), and a plurality of supporting blocks 3 (217) are evenly installed around the bottom of the upper sealing disk (216), and the bottoms of the supporting blocks 3 (217) respectively contact the top of the coil winding (102), and the combination of the upper sealing disk (216) and the supporting block 3 (217) is divided into two from the middle to form a detachable two-petal structure.

5. A dry-type transformer for double-split photovoltaic power generation according to claim 4, characterized in that: It also includes a high-temperature linkage assembly (3), wherein the high-temperature linkage assembly (3) includes a gear (309) rotatably connected to each side of the upper high-voltage winding; A groove three is provided in the middle of each support block three (217); a conduit three (218) is installed on the outer side of one of the support blocks three (217) in each group of the sealed air guide structure, and the conduit three (218) is connected to the inner groove three of the support block three (217); the outer port of the conduit one (207) is connected to the auxiliary air duct two (219), and the outer port of the auxiliary air duct two (219) is connected to the Rafale nozzle two (220); The sealing air guide structure at each group also includes a third ring (221) sleeved on the outside of the upper sealing disk (216), and a plurality of second slide bars (222) slidably fitted around the inside of the third ring (221), the second slide bars (222) being respectively mounted on the top of the side of the upper high-voltage winding, and the third ring (221) is provided with a second notch for accommodating the third conduit (218); One side of the gear (309) is meshedly connected with a rack gear 2 (310), the top end of the rack gear 2 (310) is correspondingly connected to the circle gear 3 (221), and the bottom end of the rack gear 2 (310) is correspondingly connected to the circle gear 2 (214).

6. A dry-type transformer for double-split photovoltaic power generation according to claim 5, characterized in that: The other side of the gear (309) is meshedly connected with a rack (308), a support arm (307) is installed in the middle of one side of the rack (308), one end of the support arm (307) is connected to a piston rod (304), a piston ring (303) is installed at the bottom end of the piston rod (304), the outside of the piston ring (303) is matched with a cylinder body (301), the cylinder body (301) is respectively correspondingly installed on the side of the high-voltage winding above, a groove (306) is opened on the upper side of the tube wall of the cylinder body (301) along its axial direction, the support arm (307) is respectively correspondingly matched in the inside of the groove (306), and the upper and lower ports of the cylinder body (301) are respectively installed with end covers (302); The lower end cover (302) is provided with a connecting pipe, one end of which is in communication with the interior of the cylinder body (301), and the other end of which is connected to a heating bottle (305). The heating bottles (305) are respectively arranged inside the second conduit (211); the interior of the heating bottles (305) is filled with a liquid that expands when heated.

7. A dry-type transformer for double-split photovoltaic power generation according to claim 6, characterized in that: It also includes a sound insulation and heat dissipation component (4), wherein bases (106) are provided on both sides of the bottom of the lower clamp (105), and the sound insulation and heat dissipation component (4) includes an upper cover plate (401) provided on the top of the upper clamp (104), a lower cover plate (402) provided between the lower clamp (105) and the base (106), side covers (403) provided on both sides, and side covers (404) provided on both sides; The inner sides of the upper cover plate (401), the lower cover plate (402), the side cover plate (403), and the edge cover plate (404) are all installed with sound insulation felt; the top of the side cover plate (403) is respectively connected to the two sides of the upper cover plate (401); the bottom of the side cover plate (403) is respectively connected to the two sides of the lower cover plate (402); the top of the edge cover plate (404) is respectively connected to the two sides of the upper cover plate (401); the bottom of the edge cover plate (404) is respectively connected to the two sides of the lower cover plate (402); and the contact edges between adjacent side cover plates (403) and edge cover plates (404) are connected to each other.

8. A dry-type transformer for double-split photovoltaic power generation according to claim 7, characterized in that: The sound insulation and heat dissipation assembly (4) further comprises a lower variable diameter trumpet tube (407) corresponding to the position of each coil winding (102) and installed in the middle of the side cover plate (403) on one side, the large diameter end of the lower variable diameter trumpet tube (407) extending toward the corresponding coil winding (102), the small diameter end of the lower variable diameter trumpet tube (407) correspondingly passing through the side cover plate (403), and the Laval nozzles (213) are respectively installed at the small diameter positions inside the lower variable diameter trumpet tube (407); The sound insulation and heat dissipation assembly (4) also includes an upper reducer trumpet (408) corresponding to the position of each coil winding (102) and installed above the side cover plate (403) on one side, the large diameter end of the upper reducer trumpet (408) extending toward the corresponding coil winding (102), the small diameter end of the upper reducer trumpet (408) correspondingly passes through the side cover plate (403), and the Rafale nozzle 2 (220) is respectively installed at the small diameter position inside the upper reducer trumpet (408).

9. A dry-type transformer for double-split photovoltaic power generation according to claim 7, characterized in that: The basic assembly (1) further comprises a lifting ring (107) mounted on the top of the upper clamp (104), and the top of the lifting ring (107) correspondingly passes through the upper cover plate (401); The basic component (1) also includes a low-voltage connection terminal (108) and a high-voltage connection terminal (109) corresponding to the position of each coil winding (102) and installed above one side of the upper clamp (104), each low-voltage connection terminal (108) is electrically connected to a low-voltage winding, and each high-voltage connection terminal (109) is electrically connected to a high-voltage winding, and the low-voltage connection terminal (108) and the high-voltage connection terminal (109) are both arranged above the upper cover plate (401).

10. A dry-type transformer for double-split photovoltaic power generation according to claim 7, characterized in that: The sound insulation and heat dissipation assembly (4) further comprises an upper rubber shock-absorbing pad (405) and a lower rubber shock-absorbing pad (406); the upper rubber shock-absorbing pad (405) is arranged between the upper cover plate (401) and the upper clamp (104); the lower rubber shock-absorbing pad (406) is arranged between the lower cover plate (402) and the lower clamp (105); and the base (106) is correspondingly mounted on two sides of the bottom of the lower cover plate (402).

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