Dry-type transformer

Abstract

The invention relates to the field of transformers, in particular to a dry-type transformer. The transformer comprises a transformer body, an iron core in the transformer body is composed of a plurality of silicon steel sheets, and semi-cured epoxy resin is coated on two sides of the silicon steel sheets. Heat dissipation holes are formed in the four side walls of the shell, the inner side of the shell is connected with main sound insulation cotton, and an air hole is formed in the middle of a top plate. Movable secondary sound insulation cotton is arranged on the outer sides of the four side walls, and penetrating holes corresponding to the heat dissipation holes are formed in the movable secondary sound insulation cotton. The lower end of the shell is connected with an electric shutter, and the upper end is connected with a plurality of fans above the air holes. Two power mechanisms are symmetrically arranged at the upper end of the shell and can drive the four pieces of secondary sound insulation cotton to move, and the air holes and the penetrating holes are staggered and aligned. A sound insulation cover is arranged at the upper end of the shell and sleeves the fan, two adjustable sound insulation cover plates are symmetrically arranged at the upper end of the sound insulation cover, and shielding and avoiding of the fan are switched through displacement. The device covers four combined scenes (high / low heat dissipation and high / low noise reduction) required by'heat dissipation-noise reduction ', and full-working-condition adaptation is realized.

Description

Technical Field

[0001] The present invention relates to the field of transformers, and specifically to a dry-type transformer. Background Art

[0002] In the power system, dry-type transformers, as important electrical equipment, are widely used in various places, such as factories, commercial buildings, residential communities, etc. With the continuous growth of power demand and the improvement of people's requirements for the quality of living environment, the performance and operating environment problems of dry-type transformers have attracted increasing attention.

[0003] Traditional dry-type transformers have some defects during operation. Firstly, there is the heat dissipation problem. When the transformer is working, it will generate a large amount of heat. If the heat cannot be dissipated in a timely and effective manner, it will cause the transformer temperature to be too high, thereby affecting its insulation performance and service life. Some traditional heat dissipation methods, such as natural ventilation or simple air cooling, have low heat dissipation efficiency and cannot meet the heat dissipation requirements during high-load operation.

[0004] Secondly, there is the noise problem. During the operation of the transformer, noise will be generated due to reasons such as magnetostriction. These noises will not only pollute the surrounding environment but may also affect people's normal life and work. Especially in some places with high noise requirements, such as hospitals and schools, the noise problem of traditional dry-type transformers is more prominent.

[0005] In addition, traditional dry-type transformers have poor adaptability under different working conditions. During actual operation, the heat dissipation and noise reduction requirements of the transformer will change with the load. However, traditional transformers often can only operate in a fixed mode and cannot flexibly adjust the heat dissipation and noise reduction strategies according to actual needs, resulting in energy waste and low operating efficiency.

[0006] Moreover, the protection structure of traditional dry-type transformers is relatively simple, and there are no effective protection measures for some important components, such as sound insulation cotton, etc., which are easily damaged by the external environment, thereby reducing the overall performance and reliability of the transformer.

[0007] In summary, in order to solve the problems existing in traditional dry-type transformers in terms of heat dissipation, noise reduction, working condition adaptability, and protection, it is of great practical significance to develop a new type of dry-type transformer. The dry-type transformer of the present invention emerges under such a background, aiming to provide a transformer device that can efficiently dissipate heat, effectively reduce noise, adapt to different working conditions, and has good protection performance. Summary of the Invention

[0008] Based on this, it is necessary to provide a dry-type transformer for the problems of the existing technology.

[0009] To solve the problems of the existing technology, the technical solution adopted by the present invention is as follows:

[0010] A dry-type transformer, comprising:

[0011] The transformer body, the iron core arranged inside the transformer body is composed of a number of silicon steel sheets, both sides of each silicon steel sheet are coated with semi-cured epoxy resin, an outer shell is sleeved outside the transformer body, a number of heat dissipation holes are formed in an equidistant array on the four side walls of the outer shell respectively, a main sound insulation cotton is fixedly connected to one side of the four side walls of the outer shell close to the transformer body, a ventilation hole is formed in the middle of the top plate of the outer shell, a secondary sound insulation cotton is movably arranged outside the four side walls of the outer shell respectively, a number of through holes corresponding to the number of heat dissipation holes one by one are formed in the secondary sound insulation cotton, an electric louver is fixedly connected to the lower end of the outer shell, a number of fans for enhancing the heat dissipation capacity of the transformer body are fixedly connected to the upper end of the outer shell, the number of fans is arranged above the ventilation hole, two power mechanisms are symmetrically arranged at the upper end of the outer shell, and the two power mechanisms are used to drive the corresponding secondary sound insulation cotton to move, so as to realize the dislocation and alignment of the number of heat dissipation holes and the number of through holes. A sound insulation cover is arranged at the upper end of the outer shell and sleeved outside the number of fans, and two sound insulation covers are adjustable at the upper end of the sound insulation cover. The two sound insulation covers are symmetrically arranged and switch the shielding and avoidance of the fans through displacement.

[0012] Furthermore, the device further includes four movable baffles and four shells. The four movable baffles are respectively slidably connected to the four side walls of the transformer outer shell. The shape of the movable baffle matches the side wall of the outer shell, and the shapes of the two relatively arranged movable baffles are the same. The four movable baffles are respectively fixedly connected to one side of the four secondary sound insulation cottons close to the outer shell. The four shells are respectively arranged on one side of the four secondary sound insulation cottons away from the outer shell. The shell is fixedly connected to the movable baffle, and avoidance holes corresponding to the number of through holes one by one are formed on the shell and the movable baffle respectively.

[0013] Furthermore, the device further includes a number of sound insulation cotton sleeves, and the number of sound insulation cotton sleeves are respectively sleeved outside the blades of the electric louver. When the electric louver is closed, the edges of two adjacent sound insulation cotton sleeves abut against each other.

[0014] Furthermore, the device further includes a number of heat dissipation fins. A number of heat dissipation fins arranged at equal intervals are respectively arranged at the lower end of each fan. When the fan drives the air flow to pass through the heat dissipation fins, the air flow will be rapidly cooled.

[0015] Further, the power mechanism further includes a power motor, a main pulley, two auxiliary pulleys, two positioning brackets, and two power pulleys. The power motor is fixedly arranged at the upper end of the housing. The main pulley is coaxially and fixedly connected to the output end of the power motor. The two positioning brackets are respectively arranged on both sides of the power motor and fixedly connected to the housing. The two auxiliary pulleys are respectively arranged on both sides of the main pulley and are respectively rotatably connected to the upper ends of the positioning brackets. The auxiliary pulley is drivingly connected to the main pulley through a belt. The two power pulleys are respectively arranged beside the two auxiliary pulleys and are respectively rotatably connected to the upper ends of the positioning brackets. The power pulley is drivingly connected to the auxiliary pulley through a belt. The power pulley is the output end of the power mechanism, and the positioning bracket is the fixed end of the power mechanism.

[0016] Further, the power mechanism further includes four main bevel gears, four auxiliary bevel gears, four main gears, four pushing racks, and two connecting plates. Two main bevel gears are arranged beside each movable baffle. The two main bevel gears located on the same side of the corresponding movable baffle are coaxially and fixedly connected. The two main bevel gears are rotatably connected to the fixed end of the power mechanism. The two main bevel gears are respectively drivingly connected to the output end of the power mechanism. The two auxiliary bevel gears are respectively meshed with the two main bevel gears. The two main gears are respectively coaxially and fixedly connected to the two auxiliary bevel gears. The two pushing racks are respectively meshed with the two main gears. The two connecting plates are respectively fixedly connected to the two pushing racks. The two connecting plates are respectively fixedly connected to the corresponding housing. When the two connecting plates move, they will drive the secondary sound insulation cotton to move through the housing.

[0017] Further, the power mechanism further includes four buffer springs. Two buffer springs are respectively arranged beside each connecting plate. One end of the buffer spring is fixedly connected to the connecting plate, and the other end is fixedly connected to the fixed end of the power mechanism.

[0018] Further, the device further includes a double-shaft motor, two first bevel gears, two second bevel gears, two first pulleys, and two second pulleys. The double-shaft motor is fixedly connected to the outer wall of the housing. The two first bevel gears are respectively coaxially and fixedly connected to the two output ends of the double-shaft motor. The two second bevel gears are respectively meshed with the two first bevel gears. The two first pulleys are respectively coaxially and fixedly connected to the two second bevel gears. The two second pulleys are respectively arranged above the two first pulleys and are drivingly connected to the first pulley through a belt.

[0019] Further, the device further includes two transfer gears, two sliding gears, and two sliding racks. Two transfer gears are respectively rotatably arranged below the sound insulation cover plate. The lower ends of the sound insulation cover plate are respectively fixedly connected to the two sliding racks. The two transfer gears are respectively coaxially and fixedly connected to the two second pulleys. The two sliding gears are respectively meshed with the two transfer gears. The two sliding racks are respectively slidably connected to the outer wall of the sound insulation cover, and the two sliding racks are respectively meshed with the two sliding gears.

[0020] The beneficial effects of the present invention compared with the prior art are:

[0021] First: Through the linkage control of the bottom electric louvers and the secondary sound insulation cotton on the side wall, as well as the cooperation of the fan and the heat dissipation fins, this dry-type transformer can flexibly switch its working state according to different heat dissipation and noise reduction requirements. When there is a high demand for heat dissipation, it can achieve efficient heat dissipation; when there is a high demand for noise reduction, it can effectively reduce noise. For example, in the working condition with high heat dissipation demand and high noise reduction demand, the air flow enters from the bottom, flows vertically upward after being cooled by the heat dissipation fins, which not only ensures the heat dissipation effect but also reduces the air flow noise, providing a good environment for the stable operation of power equipment.

[0022] Second: This device covers four combined scenarios of "heat dissipation - noise reduction" requirements (high / low heat dissipation × high / low noise reduction), achieving full working condition adaptation. Whether in the case of low load and low noise requirements or in the scenario of high load with strict requirements for both heat dissipation and noise reduction, it can automatically adjust to the best working state, improving the operation efficiency and reliability of the transformer and reducing the risk of equipment failure caused by working condition changes.

[0023] Third: The fan is set at the upper end of the ventilation hole, and the air flow enters from the bottom and flows vertically upward. This relatively concentrated and orderly air flow guidance reduces the disorder and eddy current phenomena of the air flow inside the shell, thereby reducing the additional noise generated by air flow impact and friction. In addition, the heat dissipation fins increase the contact area between the air flow and the heat dissipation components, improving the heat dissipation efficiency and enabling the transformer to operate within a more stable temperature range. Description of the Drawings

[0024] Figure 1 is the three-dimensional structure schematic diagram of the embodiment;

[0025] Figure 2 is Figure 1 the enlarged view of the structure at A in

[0026] Figure 3 is the half-sectional three-dimensional structure diagram of the embodiment;

[0027] Figure 4 is the half-sectional three-dimensional structure diagram of the shell in the embodiment;

[0028] Figure 5 is the exploded three-dimensional structure diagram of the embodiment;

[0029] Figure 6 is the top view of the three-dimensional structure of the embodiment;

[0030] Figure 7 is the bottom view of the three-dimensional structure of the embodiment;

[0031] Figure 8 is the partial structure truncation diagram of the embodiment.

[0032] The reference numerals in the figure are:

[0033] 1. Transformer body; 2. Outer shell; 3. Heat dissipation holes; 4. Main sound insulation cotton; 5. Ventilation holes; 6. Movable baffle; 7. Secondary sound insulation cotton; 8. Perforations; 9. Housing; 10. Avoidance holes; 11. Electric louver; 12. Sound insulation cotton sleeve; 13. Fan; 14. Heat dissipation fins; 15. Iron core; 16. Power mechanism; 17. Power motor; 18. Main pulley; 19. Auxiliary pulley; 20. Positioning frame; 21. Power pulley; 22. Main bevel gear; 23. Auxiliary bevel gear; 24. Main gear; 25. Pushing rack; 26. Connecting card plate; 27. Buffer spring; 28. Sound insulation cover; 29. Biaxial motor; 30. First bevel gear; 31. Second bevel gear; 32. First pulley; 33. Second pulley; 34. Transfer gear; 35. Sliding gear; 36. Sliding rack; 37. Sound insulation cover plate. Specific embodiments

[0034] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Reference Figures 1 to 8 , a dry-type transformer, comprising:

[0036] The transformer body 1 (as shown in Figure 5 ), the iron core 15 arranged inside the transformer body 1 is composed of a plurality of silicon steel sheets, and semi-cured epoxy resin is coated on both sides of each silicon steel sheet. An outer shell 2 is sleeved outside the transformer body 1. A plurality of heat dissipation holes 3 are formed at equal intervals in an array on the four side walls of the outer shell 2. A main sound insulation cotton 4 is fixedly connected to one side of the four side walls of the outer shell 2 close to the transformer body 1. A ventilation hole 5 is formed in the middle of the top plate of the outer shell 2. A layer of secondary sound insulation cotton 7 is movably arranged outside the four side walls of the outer shell 2 respectively. A plurality of perforations 8 corresponding to the plurality of heat dissipation holes 3 one by one are formed in the secondary sound insulation cotton 7. An electric louver 11 is fixedly connected to the lower end of the outer shell 2. A plurality of fans 13 for enhancing the heat dissipation capacity of the transformer body 1 are fixedly connected to the upper end of the outer shell 2. The plurality of fans 13 are arranged above the ventilation hole 5. Two power mechanisms 16 are symmetrically arranged at the upper end of the outer shell 2. The two power mechanisms 16 are used to drive the corresponding secondary sound insulation cotton 7 to move, so as to realize the dislocation and alignment of the plurality of heat dissipation holes 3 and the plurality of perforations 8. A sound insulation cover 28 is arranged at the upper end of the outer shell 2 and sleeved outside the plurality of fans 13. Two sound insulation cover plates 37 are adjustably arranged at the upper end of the sound insulation cover 28. The two sound insulation cover plates 37 are symmetrically arranged and switch the shielding and avoidance of the fans 13 by displacement.

[0037] When the transformer body 1 is in operation, the iron core 15 generates heat, and then the semi-cured epoxy resin completely cures the iron core 15. All the silicon steel sheets are bonded together, and the entire iron core 15, including its interior, is connected as a whole, which can greatly improve the noise problem caused by magnetostriction in the transformer body 1. When the transformer body 1 generates heat and noise, there are currently four working states:

[0038] When the heat dissipation requirement is low and the noise reduction requirement is low, the electric louver 11 at the bottom of the housing 2 is closed, the heat dissipation holes 3 on the side wall of the housing 2 are blocked by the movable secondary sound insulation cotton 7, and the heat dissipation holes 3 and the perforations 8 are staggered one by one;

[0039] When the heat dissipation requirement is low and the noise reduction requirement is high, the electric louver 11 at the bottom of the housing 2 is closed, the heat dissipation holes 3 on the side wall of the housing 2 are staggered from the movable secondary sound insulation cotton 7, and the heat dissipation holes 3 and the perforations 8 are aligned one by one;

[0040] When the heat dissipation requirement is high and the noise reduction requirement is high, the electric louver 11 at the bottom of the housing 2 is opened, the heat dissipation holes 3 on the side wall of the housing 2 are blocked by the secondary sound insulation cotton 7, and the heat dissipation holes 3 and the perforations 8 are staggered one by one. During this process, the fan 13 is arranged at the upper end of the ventilation hole 5, and the air flow enters from the bottom and flows vertically upward. This relatively concentrated and orderly air flow guidance reduces the disorder and eddy current phenomena of the air flow inside the housing 2, thereby reducing the additional noise generated by the air flow impact and friction, which is beneficial to meeting the noise reduction requirement;

[0041] When the heat dissipation requirement is high and the noise reduction requirement is low, the electric louver 11 of the bottom louver is opened, the heat dissipation holes 3 on the side wall of the housing 2 are staggered from the secondary sound insulation cotton 7, and the heat dissipation holes 3 and the perforations 8 are aligned one by one.

[0042] Through the linkage control of the electric louver 11 at the bottom and the secondary sound insulation cotton 7 on the side wall, this device covers four combined scenarios of "heat dissipation - noise reduction" requirements (high / low heat dissipation × high / low noise reduction), achieving full-condition adaptation.

[0043] In order to protect both sides of the secondary sound insulation cotton 7, the following features are specifically set:

[0044] The device further includes four movable baffles 6 and four housings 9. The four movable baffles 6 are respectively slidably connected to the four side walls of the transformer housing 2. The shape of the movable baffle 6 conforms to the side wall of the housing 2, and the shapes of the two relatively arranged movable baffles 6 are the same. The four movable baffles 6 are respectively fixedly connected to one side of the four secondary sound insulation cottons 7 close to the housing 2. The four housings 9 are respectively arranged on one side of the four secondary sound insulation cottons 7 away from the housing 2. The housing 9 is fixedly connected to the movable baffle 6. Avoidance holes 10 corresponding to a plurality of perforations 8 are respectively formed on the housing 9 and the movable baffle 6. The arrangement of the four movable baffles 6 and the four housings 9 plays an important role in protecting both sides of the secondary sound insulation cotton 7. The movable baffle 6 is slidably connected to the four side walls of the transformer housing 2 and can move smoothly along the side walls. Its shape conforms to the side wall of the housing 2, and the shapes of the two relatively arranged movable baffles 6 are the same, ensuring the symmetry and stability of the structure. The movable baffle 6 is fixedly connected to one side of the secondary sound insulation cotton 7 close to the housing 2, and the housing 9 is arranged on one side of the secondary sound insulation cotton 7 away from the housing 2 and is fixedly connected to the movable baffle 6. Such a structure makes the movable baffle 6 and the housing 9 like a whole, clamping the secondary sound insulation cotton 7 in the middle (and the avoidance holes 10 correspond to the perforations 8 one by one), preventing the secondary sound insulation cotton 7 from being directly collided and rubbed by the outside world during the movement, prolonging the service life of the secondary sound insulation cotton 7, and at the same time ensuring the stability and reliability of the secondary sound insulation cotton 7 during operation.

[0045] In order to enhance the sound insulation effect of the electric louver 11, the following features are specifically provided:

[0046] The device further includes a plurality of sound insulation cotton sleeves 12. The plurality of sound insulation cotton sleeves 12 are respectively sleeved on the outside of the blades of the electric louver 11. When the electric louver 11 is closed, the edges of two adjacent sound insulation cotton sleeves 12 abut against each other. The plurality of sound insulation cotton sleeves 12 are sleeved on the outside of the blades of the electric louver 11. This design greatly enhances the sound insulation effect of the electric louver 11. The sound insulation cotton sleeve 12 has good sound absorption performance. When the electric louver 11 is closed, the sound insulation cotton sleeve 12 can effectively absorb and block the noise generated by the transformer from spreading outward. The abutting of the edges of adjacent sound insulation cotton sleeves 12 forms a continuous sound insulation barrier, reducing the possibility of noise leakage through the louver gaps, further enhancing the noise reduction ability of the entire dry-type transformer, and enabling better meeting the noise reduction requirements in working scenarios where noise needs to be reduced.

[0047] In order to improve the cooling capacity of a plurality of fans 13, the following features are specifically provided:

[0048] The device further includes a number of heat dissipation fins 14. A number of heat dissipation fins 14 arranged at equal intervals are respectively provided at the lower ends of each fan 13. When the fan 13 drives the air flow to pass through the heat dissipation fins 14, the air flow will be rapidly cooled. After the fan 13 is started, the air flow enters from the electric louver 11 at the bottom of the housing 2 and flows vertically upward under the action of the fan 13. When the air flow passes upward through the heat dissipation fins 14, since the heat dissipation fins 14 have a large surface area and are arranged at equal intervals, this enables the air flow to be in full contact with the heat dissipation fins 14.

[0049] The heat dissipation fins 14 are usually made of a material with high thermal conductivity and can quickly absorb the heat dissipated by the transformer body 1 into the surrounding air. When the air flow contacts the heat dissipation fins 14, the heat will be transferred from the heat dissipation fins 14 to the air flow. The design of arranging at equal intervals ensures that the air flow can uniformly pass through the gaps between each heat dissipation fin 14, avoiding the problem of uneven heat dissipation caused by local obstruction of the air flow.

[0050] During the process of passing through the heat dissipation fins 14, the air flow continuously absorbs the heat on the heat dissipation fins 14 and its own temperature gradually rises. And the heat dissipation fins 14 have their temperature reduced because the heat is taken away by the air flow, and can continuously absorb the heat dissipated by the transformer body 1 from the surrounding environment. After the temperature of the air flow passing through the heat dissipation fins 14 rises, it is discharged from the housing 2 through the ventilation hole 5 in the middle of the top plate of the housing 2.

[0051] In order to supplement the specific structure of the power mechanism 16, the following features are specifically provided:

[0052] The power mechanism 16 also includes a power motor 17, a main pulley 18, two secondary pulleys 19, two positioning frames 20 and two power pulleys 21. The power motor 17 is fixedly arranged at the upper end of the housing 2. The main pulley 18 is coaxially fixedly connected to the output end of the power motor 17. The two positioning frames 20 are respectively arranged on both sides of the power motor 17 and are fixedly connected to the housing 2. The two secondary pulleys 19 are respectively arranged on both sides of the main pulley 18 and are respectively rotatably connected to the upper ends of the positioning frames 20. The secondary pulley 19 is connected to the main pulley 18 through a belt. The two power pulleys 21 are respectively arranged on the sides of the two secondary pulleys 19 and are respectively rotatably connected to the upper ends of the positioning frames 20. The power pulley 21 is connected to the secondary pulley 19 through a belt. The power pulley 21 is the output end of the power mechanism 16, and the positioning frame 20 is the fixed end of the power mechanism 16. In the power mechanism 16, the power motor 17 is fixedly arranged at the upper end of the housing 2 to provide power to the main pulley 18. The main pulley 18 is coaxially connected to the output end of the power motor 17, and can accurately transmit the power of the power motor 17. Two positioning frames 20 are respectively arranged on both sides of the power motor 17 and are fixed to the outer shell 2, which plays a role of fixing and supporting, and ensures the stability of the power mechanism 16. Two secondary pulleys 19 are respectively arranged on both sides of the main pulley 18 and are rotatably connected to the upper end of the positioning frame 20. They are connected to the main pulley 18 through a belt transmission connection, thereby realizing the initial transmission and distribution of power. Two power pulleys 21 are respectively arranged on the sides of the two secondary pulleys 19 and are rotatably connected to the upper end of the positioning frame 20. They are connected to the secondary pulley 19 through a belt transmission connection, thereby further transmitting the power and serving as the output end of the power mechanism 16. As the fixed end of the power mechanism 16, the positioning frame 20 ensures the smoothness and reliability of the entire power transmission process, and provides stable power support for the movement of the secondary sound insulation cotton 7.

[0053] In order to drive the secondary sound insulation cotton 7 to move, the following features are also specifically set:

[0054] The power mechanism 16 further includes four main bevel gears 22, four secondary bevel gears 23, four main gears 24, four push racks 25 and two connecting plates 26. Two main bevel gears 22 are arranged beside each movable baffle 6. The two main bevel gears 22 located on the same side of the corresponding movable baffle 6 are coaxially fixed. The two main bevel gears 22 are rotatably connected to the fixed end of the power mechanism 16, and the two main bevel gears 22 are respectively in transmission connection with the output end of the power mechanism 16. The two secondary bevel gears 23 are respectively meshed with the two main bevel gears 22. The two main gears 24 are respectively coaxially fixed to the two secondary bevel gears 23. The two push racks 25 are respectively meshed with the two main gears 24. The two connecting plates 26 are respectively fixed to the two push racks 25. The two connecting plates 26 are respectively fixed to the corresponding housing 9. When the two connecting plates 26 move, they will drive the secondary sound insulation cotton 7 to move through the housing 9. When the power pulley 21 rotates, the power pulley 21 will drive the secondary bevel gear 23 to rotate through the main bevel gear 22. The secondary bevel gear 23 will drive the push rack 25 to move through the main gear 24. After the push rack 25 moves, it will drive the connecting plate 26 to move. When the two connecting plates 26 move, the connecting plate 26 will drive the secondary sound insulation cotton 7 to move through the housing 9, realizing the dislocation and alignment of the heat dissipation holes 3 and the through holes 8 to meet different heat dissipation and noise reduction requirements.

[0055] In order to buffer the movement of the connecting plate 26, the following features are specifically provided:

[0056] The power mechanism 16 further includes four buffer springs 27. Two buffer springs 27 are respectively arranged beside each connecting plate 26. One end of the buffer spring 27 is fixed to the connecting plate 26, and the other end is fixed to the fixed end of the power mechanism 16. When the connecting plate 26 moves, the buffer spring 27 will play a buffering role at the moment when the connecting plate 26 starts to move and stops moving, avoiding large impact forces generated by the sudden start or stop of the connecting plate 26. This buffering can reduce the wear between the connecting plate 26 and other components, extend the service life of the components, and at the same time reduce the noise generated by the impact force, improving the stability and reliability of the entire device.

[0057] In order to provide power for the movement of the sound insulation cover plate 37, the following features are specifically provided:

[0058] The device further includes a biaxial motor 29, two first bevel gears 30, two second bevel gears 31, two first belt pulleys 32 and two second belt pulleys 33. The biaxial motor 29 is fixedly connected to the outer wall of the housing 2. The two first bevel gears 30 are coaxially and fixedly connected to the two output ends of the biaxial motor 29 respectively. The two second bevel gears 31 are meshed with the two first bevel gears 30 respectively. The two first belt pulleys 32 are coaxially and fixedly connected to the two second bevel gears 31 respectively. The two second belt pulleys 33 are respectively arranged above the two first belt pulleys 32 and are drivingly connected to the first belt pulleys 32 through belts. In the process of providing power for the movement of the sound insulation cover 37, the biaxial motor 29 is fixedly connected to the outer wall of the housing 2 to provide a power source for the entire power system. The two first bevel gears 30 are coaxially and fixedly connected to the two output ends of the biaxial motor 29 respectively to transmit the power of the biaxial motor 29. The two second bevel gears 31 are meshed with the two first bevel gears 30 respectively to change the direction of power transmission. The two first belt pulleys 32 are coaxially and fixedly connected to the two second bevel gears 31 respectively to transmit the power to the first belt pulleys 32. The two second belt pulleys 33 are respectively arranged above the two first belt pulleys 32 and are drivingly connected to the first belt pulleys 32 through belts to further transmit the power. Through such a transmission structure, the power of the biaxial motor 29 is effectively transmitted to the subsequent components, providing stable and reliable power support for the movement of the sound insulation cover 37.

[0059] In order to realize the synchronous movement of the two sound insulation covers 37, the following features are specifically set:

[0060] The device further includes two transfer gears 34, two sliding gears 35 and two sliding racks 36. Two transfer gears 34 are respectively rotatably arranged below the sound insulation cover 37. The lower ends of the sound insulation cover 37 are fixedly connected to the two sliding racks 36 respectively. The two transfer gears 34 are coaxially and fixedly connected to the two second belt pulleys 33 respectively. The two sliding gears 35 are meshed with the two transfer gears 34 respectively. The two sliding racks 36 are respectively slidably connected to the outer wall of the sound insulation cover 28. The two sliding racks 36 are meshed with the two sliding gears 35 respectively. After the second belt pulley 33 rotates, the second belt pulley 33 will drive the sliding gear 35 to rotate through the transfer gear 34, and the sliding gear 35 will drive the sound insulation cover 37 to move through the sliding rack 36, so as to accurately switch the shielding and avoidance of the fan 13 to meet the heat dissipation and noise reduction requirements under different working conditions.

[0061] The working principle of the device is as follows. When the dry-type transformer is put into operation, the iron core 15 inside the transformer body 1 will generate heat and noise due to electromagnetic induction. The iron core 15 is composed of several silicon steel sheets coated with semi-cured epoxy resin. During the operation and heating process, the semi-cured epoxy resin will be completely cured, bonding the silicon steel sheets into a whole, thereby improving the noise problem caused by magnetostriction.

[0062] During the operation of the transformer body 1, the working state will be switched according to different heat dissipation and noise reduction requirements. When the heat dissipation requirement is low and the noise reduction requirement is low, the control system will issue an instruction to close the electric louver 11 at the bottom of the housing 2. At the same time, the power mechanism 16 starts to work, the power motor 17 drives the main pulley 18 to rotate, and the main pulley 18 drives the secondary pulley 19 and the power pulley 21 to rotate through belt transmission. The power pulley 21 transmits the power to the main bevel gear 22, the main bevel gear 22 drives the secondary bevel gear 23 to rotate, the secondary bevel gear 23 drives the main gear 24 to rotate, the main gear 24 meshes with the pushing rack 25, causing the connecting card plate 26 to move, driving the secondary sound insulation cotton 7 to move through the housing 9, so that the heat dissipation holes 3 and the perforations 8 are staggered one by one, reducing air circulation, reducing noise transmission and also reducing unnecessary heat dissipation.

[0063] When the heat dissipation requirement is low but the noise reduction requirement is high, the electric louver 11 is also closed, and the power mechanism 16 drives the secondary sound insulation cotton 7 to move, so that the heat dissipation holes 3 and the perforations 8 are aligned one by one, and the sound absorption effect of the main sound insulation cotton 4 and the secondary sound insulation cotton 7 is used to minimize the noise.

[0064] When the heat dissipation requirement is high and the noise reduction requirement is high, the electric louver 11 is opened, and the perforations 8 of the secondary sound insulation cotton 7 are staggered from the heat dissipation holes 3. At the same time, the fan 13 is started, and the air flow enters from the bottom electric louver 11, flows vertically upward and finally discharges through the ventilation holes 5. This relatively concentrated and orderly air flow guidance reduces the disorder and eddy current phenomena of the air flow inside the housing 2, and reduces the additional noise generated by air flow impact and friction.

[0065] When the heat dissipation requirement is high but the noise reduction requirement is low, the electric louver 11 is opened, and the secondary sound insulation cotton 7 moves to align the heat dissipation holes 3 with the perforations 8 to ensure the maximum air flow rate and achieve efficient heat dissipation.

[0066] When controlling the sound insulation cover 37, the double-axis motor 29 is started. Through the transmission of the first bevel gear 30, the second bevel gear 31, the first pulley 32 and the second pulley 33, the transfer gear 34 is driven to rotate. The transfer gear 34 drives the sliding gear 35 to rotate, and the sliding gear 35 meshes with the sliding rack 36 to realize the synchronous movement of the two sound insulation covers 37, switching the shielding and avoidance of the fan 13, and further adjusting the heat dissipation and noise reduction effects. The buffer spring 27 plays a buffering role when the connecting card plate 26 moves, reducing component wear and noise. Through the linkage control of the bottom electric louver 11 and the side wall secondary sound insulation cotton 7, and the cooperation of the sound insulation cover 37, this device can cover four combined scenarios of "heat dissipation - noise reduction" requirements and achieve full working condition adaptation.

[0067] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A dry-type transformer, characterized in that: include: The transformer body, the iron core arranged inside the transformer body is composed of a number of silicon steel sheets, and semi-cured epoxy resin is applied on both sides of each silicon steel sheet. The outer sleeve of the transformer body is provided with an outer shell, and a number of heat dissipation holes are formed in an array at equal intervals on the four side walls of the outer shell. The four side walls of the outer shell are fixedly connected with the main sound insulation cotton on the side close to the transformer body, and a vent hole is formed in the middle of the top plate of the outer shell. A layer of sound insulation cotton is movably arranged on the outside of the four side walls of the outer shell, and a number of perforations corresponding to the heat dissipation holes are formed on the secondary sound insulation cotton. The lower end of the outer shell is fixedly connected with Electric blinds, the upper end of the shell is fixedly connected with several fans for increasing the heat dissipation capacity of the transformer body, several fans are arranged at the upper end of the air vents, the upper end of the shell is symmetrically provided with two power mechanisms, the two power mechanisms are used to drive the corresponding secondary sound insulation cotton to move, so as to achieve the misalignment and alignment of several heat dissipation holes and several perforations, the sound insulation cover is arranged at the upper end of the shell and is sleeved on the outside of several fans, the upper end of the sound insulation cover is adjustable with two sound insulation cover plates, the two sound insulation cover plates are symmetrically arranged and the shielding and avoidance of the fans are switched by displacement.

2. A dry-type transformer according to claim 1, characterized in that: It also includes four movable baffles and four shells. The four movable baffles are respectively slidably connected to the four side walls of the transformer casing. The shape of the movable baffles is consistent with the side walls of the casing, and the shapes of the two relatively arranged movable baffles are the same. The four movable baffles are respectively fixedly connected to the side of the four secondary sound insulation cottons close to the casing. The four shells are respectively arranged on the side of the four secondary sound insulation cottons away from the casing. The shells are fixedly connected to the movable baffles, and the shells and the movable baffles are respectively formed with avoidance holes corresponding to a plurality of perforations.

3. A dry-type transformer according to claim 1, characterized in that: It also includes a plurality of sound insulation cotton sleeves, which are respectively sleeved on the outside of the electric shutter blades. When the electric shutter is closed, the edges of two adjacent sound insulation cotton sleeves are abutted against each other.

4. A dry-type transformer according to claim 1, characterized in that: It also includes a plurality of heat dissipation fins. The lower end of each fan is respectively provided with a plurality of heat dissipation fins arranged at equal intervals. When the fan drives the airflow to pass through the heat dissipation fins, the airflow will be rapidly cooled.

5. A dry-type transformer according to claim 1, characterized in that: The power mechanism also includes a power motor, a main pulley, two secondary pulleys, two positioning frames and two power pulleys. The power motor is fixedly arranged at the upper end of the outer shell, the main pulley is coaxially fixedly connected to the output end of the power motor, the two positioning frames are respectively arranged on both sides of the power motor and fixedly connected to the outer shell, the two secondary pulleys are respectively arranged on both sides of the main pulley and are respectively rotatably connected to the upper ends of the positioning frames, the secondary pulley is transmission connected to the main pulley through a belt, the two power pulleys are respectively arranged on the sides of the two secondary pulleys and are respectively rotatably connected to the upper ends of the positioning frames, the power pulley is transmission connected to the secondary pulley through a belt, the power pulley is the output end of the power mechanism, and the positioning frame is the fixed end of the power mechanism.

6. A dry-type transformer according to claim 2, characterized in that: The power mechanism also includes four main bevel teeth, four secondary bevel teeth, four main gears, four push racks and two connecting clamps. Two main bevel teeth are arranged on the side of each movable baffle. The two main bevel teeth located on the same side of the corresponding movable baffle are coaxially fixedly connected. The two main bevel teeth are rotatably connected to the fixed end of the power mechanism. The two main bevel teeth are respectively transmission connected to the output end of the power mechanism. The two secondary bevel teeth are respectively meshed with the two main bevel teeth. The two main gears are respectively coaxially fixed with the two secondary bevel teeth. The two push racks are respectively meshed with the two main gears. The two connecting clamps are respectively fixedly connected to the two push racks. The two connecting clamps are respectively fixedly connected to the corresponding shells. When the two connecting clamps move, they will drive the secondary sound insulation cotton to move through the shell.

7. A dry-type transformer according to claim 6, characterized in that: The power mechanism also includes four buffer springs. Two buffer springs are respectively arranged on the sides of each connecting card. One end of the buffer spring is fixedly connected to the connecting card, and the other end is fixedly connected to the fixed end of the power mechanism.

8. A dry-type transformer according to claim 1, characterized in that: It also includes a dual-axis motor, two first bevel teeth, two second bevel teeth, two first pulleys and two second pulleys. The dual-axis motor is fixedly connected to the outer wall of the shell, the two first bevel teeth are respectively fixedly connected to the two output ends of the dual-axis motor coaxially, the two second bevel teeth are respectively meshed with the two first bevel teeth, the two first pulleys are respectively fixedly connected to the two second bevel teeth coaxially, and the two second pulleys are respectively arranged above the two first pulleys and are connected to the first pulleys through belts.

9. A dry-type transformer according to claim 8, characterized in that: It also includes two transfer gears, two sliding gears and two sliding racks. Two transfer gears are rotatably arranged under the sound insulation cover plate. The lower end of the sound insulation cover plate is fixedly connected to the two sliding racks respectively. The two transfer gears are fixedly connected to the two second pulleys coaxially. The two sliding gears are meshed with the two transfer gears respectively. The two sliding racks are slidably connected to the outer wall of the sound insulation cover respectively, and the two sliding racks are meshed with the two sliding gears respectively.

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