Noise reduction type novel dry-type transformer

Abstract

The invention discloses a noise reduction type novel dry-type transformer, and belongs to the technical field of dry-type transformers, the noise reduction type novel dry-type transformer comprises a dry-type transformer body and a shell, the dry-type transformer body is arranged in the shell, two bottom beams are fixedly arranged at the bottom end of the dry-type transformer body in the front-back direction, and damping assemblies are arranged at the positions, located at the four corners, of the inner bottom wall of the shell; the two ends of each bottom beam are in butt joint with the corresponding damping assemblies. The damping assembly counteracts vibration of the dry-type transformer body through the bottom beam. According to the dry-type transformer, the phenomenon of iron core vibration or winding vibration can be caused in the using process of the dry-type transformer body through the damping assemblies, when the dry-type transformer body vibrates, vibration is transmitted to each damping assembly through the bottom beam, the vibration of the dry-type transformer body is counteracted through the damping assemblies, vibration generated in the using process of the dry-type transformer body is reduced, and the service life of the dry-type transformer body is prolonged. Meanwhile, noise generated when the dry-type transformer body works is reduced, and noise pollution is controlled.

Description

Technical Field

[0001] The present invention relates to a dry-type transformer, in particular to a novel dry-type transformer with noise reduction. Background Art

[0002] Dry-type transformers are transformers whose core and windings are not immersed in insulating oil. Cooling methods are categorized as natural air cooling (AN) and forced air cooling (AF). Natural air cooling allows for long-term continuous operation at rated capacity. Forced cooling, with natural ventilation below 100°C and forced ventilation above 100°C, can increase transformer output capacity by 50%. These transformers are suitable for intermittent overload operation or emergency overload conditions. However, due to the significant increase in load loss and impedance voltage during overload, prolonged continuous overload operation should be avoided.

[0003] Existing dry-type transformers have different insulation ratings depending on the application. The standard IP20 rating is primarily for indoor use, while the IP43 rating can be used outdoors. IP54 ratings are used in harsher environments, such as mines and other dusty environments. The main difference between IP20, IP43, and IP54 ratings lies in the type of ventilation openings. The IP20 vents are mesh-like holes directly in the housing, lacking rain protection and suitable for indoor use. The IP43 vents have an additional grille to prevent water from entering at angles up to 60° from vertical, making them suitable for outdoor use. The IP54 grille can be opened and closed like a door, offering greater flexibility. After production, the dry-type transformer is hoisted using lifting equipment and lowered into the housing from the top. The top of the housing is not sealed in advance, and then welded shut. After assembly, the magnetostriction of the silicon steel sheets during operation can cause the core to vibrate. In addition to issues with the silicon steel sheets themselves, magnetic flux leakage can occur at the joints between the sheets and the laminations, potentially causing core or winding vibration. This can generate noise. Therefore, dry-type transformers generate noise as soon as they are started and operated. Summary of the Invention

[0004] The purpose of the present invention is to provide a novel dry-type transformer with noise reduction, which has the advantage of reducing the vibration generated during the use of the dry-type transformer and effectively reduces the noise pollution caused by the vibration of the iron core and winding of the dry-type transformer in the prior art.

[0005] The present invention adopts the following technical solution: a novel dry-type transformer with noise reduction, comprising a dry-type transformer body and a shell. The dry-type transformer body is arranged in the shell. Two bottom beams are fixedly provided at the bottom end of the dry-type transformer body in the front-to-back direction. Shock-absorbing components are provided at the four corners of the inner bottom wall of the shell. Both ends of each bottom beam are connected to the corresponding shock-absorbing component. The shock-absorbing component offsets the vibration of the dry-type transformer body through the bottom beam.

[0006] Furthermore, the shock absorbing assembly includes a shock absorbing block slidingly arranged on the inner bottom wall of the shell along the front-back direction, a slider slidingly arranged on the outer side of the shock absorbing block along the up-down direction, a connecting rod fixedly arranged on the outer side of the slider, a damping block fixedly arranged on the outer end of the connecting rod, and the damping block slidingly arranged on the downward inclined surface; a shock absorbing spring fixedly arranged between the shock absorbing block and the inner side wall of the shell, the shock absorbing spring always pushes the shock absorbing block to move inward.

[0007] Furthermore, the front and rear sides of the shell are provided with air outlets and air inlets; two cross-flow fans are fixedly provided on the upper end surfaces of the two bottom beams, and an air suction pipe is fixedly provided at the suction port of each cross-flow fan; two air inlet duct assemblies are provided on the front and rear sides of the shell, the inner end of the air inlet duct assembly is connected with the air suction pipe, and the outer end of the air inlet duct assembly is connected with the air inlet; a downward inclined surface is provided on the lower end surface of the air inlet duct assembly; the damping block is arranged to slide along the inclined surface direction with the air inlet duct assembly by cooperating with the downward inclined surface.

[0008] Furthermore, the air inlet duct assembly includes a lower shell and an upper shell, and the upper shell is slidably arranged on the upper end surface of the lower shell in the front-to-back direction; the lower shell is fixedly arranged on the outer shell; the outer side surfaces of the upper shell and the lower shell are provided with notches, and the notches of the upper shell and the lower shell together constitute an external vent, and the upper shell and the lower shell are connected with the air inlet of the outer shell through the external vent; the inner side surface of the upper shell is provided with an internal vent, and the upper shell and the lower shell are connected with the air suction duct through the internal vent; a number of doors are installed on the front and rear sides of the outer shell, and the upper and lower parts of each door are respectively provided with an air outlet and an air inlet; ribs are formed between each two adjacent doors, and the ribs are fixedly connected between the top plate and the bottom plate of the outer shell; there is a set gap between the inner side surface of the ribs and the inner side surface of the door, and the inner side surface of the ribs is closer to the outside.

[0009] Furthermore, a bottom lining plate is fixedly provided on the inner bottom wall of the shell, and a mounting groove is provided on the upper end surface of the bottom lining plate. A push rod and two push blocks are slidingly provided on the inner bottom wall of the mounting groove along the front-rear direction. A transmission device is provided between the push rod and the two push blocks. The push rod moves backward and pushes the two push blocks to move outward at the same time through the transmission device. A connecting rod is fixedly provided on the outer side surfaces of the two push blocks, and an L-plate is fixedly provided on the outer side surface of each shock-absorbing block. Both end portions of each connecting rod are located on the upper end surface of the corresponding L-plate.

[0010] Furthermore, the transmission device includes a connecting rod hinged to the rear end of the push rod and a lever hinged to the bottom wall of the mounting groove. The rear end of the connecting rod is hinged to the push block on the rear side. Long through slots are provided at both ends of the lever. The upper end surfaces of the front push block and the push rod are fixed with drive pins, and each drive pin is inserted into the corresponding through slot.

[0011] Furthermore, a first fixing plate is fixedly provided on both the left and right side surfaces of the push rod, a second fixing plate is fixedly provided on both sides of the inner bottom wall of the mounting groove, and a return spring is fixedly provided between each first fixing plate and the corresponding second fixing plate, and the return spring always drives the first fixing plate to move backward; a locking block is fixedly provided on the front side surface of the bottom lining plate, a locking bolt is sleeved inside the locking block, a threaded hole is provided on the front end surface of the push rod, and side grooves are provided on both sides of the front end of the push rod.

[0012] Furthermore, the outer end of the shock-absorbing spring is fixedly provided with an end plate, the upper end surface of the end plate is fixedly provided with a frame, the inner side surface of the frame is fixedly provided with the upper shell, and the end plate is slidably provided on the inner bottom wall of the shell along the front-back direction.

[0013] Furthermore, two baffles are fixedly provided on the inner bottom wall of the outer shell, and a restricted space is formed between each baffle and the bottom lining plate, each shock-absorbing block is located in the corresponding restricted space, and the bottom beam is located in the corresponding restricted space; the upper end surface of the baffle is fixed to each lower shell.

[0014] Furthermore, the dry-type transformer body includes several vertically arranged low-voltage coils and high-voltage coils that are nested with each other, the low-voltage coil is nested inside the high-voltage coil, and also includes an iron core, which is composed of two parallel horizontal cores and several vertical cores fixed between the two horizontal cores. The vertical cores are arranged corresponding to the low-voltage coils, and a vertical core is inserted in each low-voltage coil; two clamping plates are provided at each horizontal core, the upper two clamping plates clamp and fix the upper horizontal core, and the lower two clamping plates clamp and fix the lower horizontal core, and two bottom beams are fixed along the front-to-back direction on the lower end surfaces of the two lower clamping plates; the high-voltage coil is provided with a high-voltage terminal, and the low-voltage coil is provided with a low-voltage copper plate.

[0015] 1. The present invention uses a shock-absorbing assembly to prevent the core vibration or winding vibration that may occur during the use of the dry-type transformer body. When the dry-type transformer body vibrates, the vibration is transmitted to each shock-absorbing assembly through the bottom beam. The shock-absorbing assembly offsets the vibration of the dry-type transformer body, thereby reducing the vibration generated by the dry-type transformer body during use and the noise generated when the dry-type transformer body is working, thereby controlling noise pollution.

[0016] 2. The present invention provides a shock-absorbing spring, a shock-absorbing block, a slider, a connecting rod and a damping hole. When the dry-type transformer body vibrates during use, the bottom beam moves forward and backward, pushing the shock-absorbing block to move outward and compressing the shock-absorbing spring, so that the shock-absorbing spring buffers and stores the vibration. When the shock-absorbing block moves outward, it drives the slider, the connecting rod and the damping block to move outward in sequence. The shock-absorbing block moves outward due to the vibration of the bottom beam, pushing the damping block to slide downward on the downward inclined surface. Therefore, the outward movement of the damping block is blocked by the downward inclined surface and is forced to move downward and outward at the same time. Since the outward movement of the damping block is blocked, a damping effect is produced on the damping block, and the vibration received by the shock-absorbing block is offset by the friction between the damping block and the downward inclined surface, thereby achieving a shock-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 Schematic diagram of the three-dimensional structure inside the shell of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the air inlet pipe assembly in the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the dry-type transformer body in the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the ribs in the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the frame in the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the lower shell in the present invention; Figure 9 Schematic diagram of the three-dimensional structure of the cover plate in the present invention; Figure 10 This is a schematic diagram of the front view mechanism of the shock absorbing block in the present invention; Figure 11 Schematic diagram of the three-dimensional structure of the shock-absorbing block in the present invention; Figure 12 For the present invention Figure 11 A schematic diagram of the structure enlargement at point A; Figure 13 This is a schematic diagram of the three-dimensional structure of the upper shell in the present invention after it moves outward; Figure 14 Schematic diagram of the three-dimensional structure of the end plate in the present invention; Figure 15 For the present invention Figure 14 A magnified schematic diagram of the structure at point B in FIG; Figure 16Schematic diagram of the three-dimensional structure of the push rod in the present invention; Figure 17 Schematic diagram of the top view of the push rod in the present invention; Figure 18 For the present invention Figure 17 Schematic diagram of the enlarged structure at point C in FIG.

[0018] In the figure, 1. dry-type transformer body; 2. shell; 3. bottom beam; 5. shock-absorbing block; 6. slider; 7. connecting rod; 8. damping block; 9. inclined plane; 10. shock-absorbing spring; 11. cross-flow fan; 12. air inlet; 13. air outlet; 14. air suction pipe; 15. lower shell; 16. upper shell; 17. notch; 18. external vent; 19. internal vent; 20. box door; 21. rib; 22. bottom lining plate; 23. mounting slot; 24. push rod; 25. push block; 26. connecting rod Moving rod; 27. L-plate; 28. Connecting rod; 29. ​​Lever; 30. Through slot; 31. Driving pin; 32. First fixing plate; 33. Second fixing plate; 34. Return spring; 35. Locking block; 36. Locking bolt; 37. Side slot; 38. Vertical part; 39. End plate; 40. Frame; 41. Stop rod; 42. Restricted space; 43. Cover plate; 44. Low-voltage coil; 45. High-voltage coil; 46. Horizontal core; 47. Clamping plate; 48. Crimp terminal; 49. Low-voltage copper plate. DETAILED DESCRIPTION

[0019] See also Figure 1-18 The present invention will be described in detail below with reference to the accompanying drawings and embodiments: The noise-reducing novel dry-type transformer described in the present invention includes a dry-type transformer body 1 and a shell 2. The dry-type transformer body 1 is arranged in the shell 2. Two bottom beams 3 are fixedly provided at the bottom end of the dry-type transformer body 1 along the front-to-back direction. The inner bottom wall of the shell 2 is provided with shock-absorbing components at four corners. Both ends of each bottom beam 3 are docked with the corresponding shock-absorbing component. The dry-type transformer body 1 may cause core vibration or winding vibration during use. When the dry-type transformer body 1 vibrates, the vibration is transmitted to each shock-absorbing component through the bottom beam 3. The shock-absorbing component offsets the vibration of the dry-type transformer body 1, thereby reducing the vibration generated by the dry-type transformer body 1 during use, while also reducing the noise generated when the dry-type transformer body 1 is working, thereby controlling noise pollution.

[0020] In this embodiment, the shock-absorbing assembly includes a shock-absorbing block 5 that is slidably arranged on the inner bottom wall of the shell 2 along the front-back direction, and a slider 6 is slidably arranged on the outer side of the shock-absorbing block 5 along the up-down direction. A connecting rod 7 is fixedly arranged on the outer side of the slider 6, and a damping block 8 is fixedly arranged on the outer end of the connecting rod 7. The damping block 8 is slidably arranged on a downwardly inclined inclined surface 9; a shock-absorbing spring 10 is fixedly arranged between the shock-absorbing block 5 and the inner side wall of the shell 2, and the shock-absorbing spring 10 always pushes the shock-absorbing block 5 to move inward; both ends of each bottom beam 3 of the dry-type transformer body 1 after installation are in contact with the inner side of the shock-absorbing block 5; when the dry-type transformer body 1 generates vibration during use, the bottom beam 3 generates a front-back displacement, pushing the shock-absorbing block 5 to move outward and compressing the shock-absorbing spring 10, so that the shock-absorbing spring 10 buffers and stores the vibration; while the shock-absorbing block 5 moves outward, it compresses the shock-absorbing spring 10. This then drives the slider 6, connecting rod 7 and damping block 8 to move outward. Since the damping block 8 is slidingly set on the downward inclined surface 9, the damping block 8 moves downward while moving outward, thereby driving the connecting rod 7 and slider 6 downward, and the slider 6 slides downward on the outer surface of the shock-absorbing block 5; the final effect is that the shock-absorbing block 5 is moved outward by the vibration of the bottom beam 3, pushing the damping block 8 to slide downward on the downward inclined surface 9, so the damping block 8 is blocked by the downward inclined surface 9 when moving outward and is forced to move downward and outward at the same time; since the damping block 8 is blocked from moving outward, a damping effect is produced on the damping block 8, and the vibration received by the shock-absorbing block 5 is offset by the friction between the damping block 8 and the downward inclined surface 9, which has a shock-absorbing effect; the shock-absorbing spring 10 has the effect of storing vibration and buffering.

[0021] The existing dry-type transformer body 1 includes a cross-flow fan 11. The cross-flow fan 11 and the dry-type transformer body 1 are completely located in the shell 2. When in use, when the temperature detected by the temperature control probe of the dry-type transformer body 1 is higher than 100 degrees, the cross-flow fan 11 starts to force cooling of the dry-type transformer body 1; the cross-flow fan 11 is located at the bottom of the dry-type transformer body 1, and draws air from the bottom of the shell 2 and exhausts air upward to blow and cool the outer surface of the dry-type transformer body 1; the air flow route is that the fresh air from the outside enters the shell 2 from the air inlet 12 at the bottom of the shell 2, is drawn away by the cross-flow fan 11, and then exhausted upward, and the fresh air blows upward from the bottom of the dry-type transformer body 1 to the dry-type transformer body The body 1 is cooled, and the fresh air flows to the top of the dry-type transformer body 1 and is then discharged to the outside through the air outlet 13 at the top of the shell 2; however, since the cross-flow fan 11 is completely located in the shell 2, there is a distance between the suction port of the cross-flow fan 11 and the air inlet 12 of the shell 2. Therefore, when the cross-flow fan 11 is working, the air extracted by the cross-flow fan 11 consists of two parts: one part is the fresh air entering from the outside through the air inlet 12 at the bottom of the shell 2, and the other part is the hot air in the shell 2; therefore, the working process of the cross-flow fan 11 actually has a partial bypass effect, which reduces the working efficiency of the cross-flow fan 11 and reduces the effect of the cross-flow fan 11 on the forced cooling of the dry-type transformer body 1.

[0022] In order to solve the above problems, in this embodiment, the front side and the rear side of the shell 2 are provided with an air outlet 13 and an air inlet 12; two cross-flow fans 11 are fixedly provided on the upper end surfaces of the two bottom beams 3, and an air suction pipe 14 is fixedly provided at the suction port of each cross-flow fan 11; two air inlet duct assemblies are provided on the front and rear sides of the shell 2, the inner end of the air inlet duct assembly is connected with the air suction pipe 14, and the outer end of the air inlet duct assembly is connected with the air inlet 12; a downward inclined surface 9 is provided on the lower end surface of the air inlet duct assembly; the damping block 8 is slidably arranged along the direction of the inclined surface 9 with the air inlet duct assembly by cooperating with the downward inclined surface 9; use When the temperature detected by the temperature control probe of the dry-type transformer body 1 is higher than 100 degrees, the cross-flow fan 11 starts to force cooling of the dry-type transformer body 1, and the fresh air from the outside enters the suction pipe 14 through the air inlet 12 and the air inlet pipe assembly, and then enters the cross-flow fan 11. The cross-flow fan 11 discharges the fresh air upward to cool the dry-type transformer body 1, and then the air is discharged from the air outlet 13 on the upper part of the shell 2, so that the air completely enters the cross-flow fan 11 from the outside, and avoids the cross-flow fan 11 from sucking in part of the air in the shell 2, thereby improving the working efficiency of the cross-flow fan 11 and improving the cooling effect.

[0023] In actual production, after the dry-type transformer body 1 is produced, it is lifted by a lifting tool and then placed into the shell 2 from the top. The top of the shell 2 is not sealed in advance. Then the top of the shell 2 is sealed by welding using a sealing plate. After the assembly of the dry-type transformer body 1 is completed, it is loaded and transported for shipment.

[0024] When the dry-type transformer body 1 and the shell 2 are assembled, in order to facilitate the docking and communication of the air inlet duct assembly and the air suction duct 14, in this embodiment, the air inlet duct assembly includes a lower shell 15 and an upper shell 16, and the upper shell 16 is slidably arranged on the upper end surface of the lower shell 15 in the front-to-back direction; the lower shell 15 is fixedly arranged on the shell 2; the outer sides of the upper shell 16 and the lower shell 15 are provided with a notch 17, and the notches 17 of the upper shell 16 and the lower shell 15 together form an external vent 18, and the upper shell 16 and the lower shell 15 are connected to the air inlet 12 of the shell 2 through the external vent 18; the inner side of the upper shell 16 is provided with an inner vent 19, and the upper shell 16 and the lower shell 15 are connected to the air suction duct 14 through the inner vent 19; a number of box doors 20 are installed on the front and rear sides of the shell 2, each box door The upper and lower parts of 20 are respectively provided with an air outlet 13 and an air inlet 12; a rib 21 is formed between each adjacent two doors 20, and the rib 21 is fixedly connected between the top plate and the bottom plate of the outer shell 2; there is a set gap between the inner side surface of the rib 21 and the inner side surface of the door 20, and the inner side surface of the rib 21 is closer to the outside; when the door 20 is closed, the rear side surface of the door 20 forces the upper shell 16 to move inward, so that the inner ventilation port 19 of the upper shell 16 is displaced backward, and then the suction pipe 14 of the cross-flow fan 11 is inserted into the inner ventilation port 19 of the upper shell 16, thereby realizing the connection between the upper shell 16 and the suction pipe 14; when all the doors 20 are opened, the upper shell 16 can move outward until it conflicts with the rear side surface of the rib 21, so that the suction pipe 14 of the cross-flow fan 11 is detached from the inner ventilation port 19 of the upper shell 16.

[0025] When hoisting the dry-type transformer body 1, all the doors 20 of the outer shell 2 are opened, and the upper shell 16 is moved outward until it contacts the ribs 21, and then the dry-type transformer body 1 is hoisted into the outer shell 2 from the top of the outer shell 2. Since all the doors 20 are open, it is convenient to locate the position of the dry-type transformer body 1. By manually adjusting the position of the dry-type transformer body 1, the dry-type transformer body 1 falls between the two upper shells 16, and the two ends of the two bottom beams 3 contact the inner side of the shock-absorbing block 5, and then all the doors 20 are closed. At this time, the rear side of the door 20 pushes the upper shell 16 to move inward, so that the suction pipe 14 of the cross-flow fan 11 is inserted into the corresponding inner vent 19 of the upper shell 16, completing the assembly of the dry-type transformer body 1.

[0026] When the dry-type transformer body 1 is hoisted into the outer casing 2, the two upper shells 16 are moved outward at the same time so that the dry-type transformer body 1 falls between the two upper shells 16. At the same time, each shock-absorbing block 5 needs to be moved outward to facilitate the two ends of the bottom beam 3 to enter between the corresponding two shock-absorbing blocks 5.

[0027] In order to solve the above problems, in this embodiment, a bottom lining plate 22 is fixedly provided on the inner bottom wall of the shell 2, and a mounting groove 23 is provided on the upper end surface of the bottom lining plate 22. A push rod 24 and two push blocks 25 are slidingly provided on the inner bottom wall of the mounting groove 23 along the front-back direction. A transmission device is provided between the push rod 24 and the two push blocks 25. The push rod 24 moves backward and pushes the two push blocks 25 to move outward at the same time through the transmission device. The outer side surfaces of the two push blocks 25 are fixedly provided with a connecting rod 26, and the outer side surface of each shock-absorbing block 5 is fixedly provided with an L-plate 27. The two end parts of each connecting rod 26 are located on the upper end surface of the corresponding L-plate 27; dry-type transformer Before the transformer body 1 is installed in the outer shell 2, the push rod 24 is pushed to move backward, so that the push block 25 pushes the two push blocks 25 to move outward at the same time through the transmission device, so that the push block 25 pushes the two connecting rods 26 to move outward at the same time, and the two connecting rods 26 move outward at the same time to contact the vertical portion 38 of each L-plate 27 and push each L-plate 27 to move outward, thereby causing each L-plate 27 to drive each shock-absorbing block 5 to move outward, thereby achieving the purpose of moving each shock-absorbing block 5 outward before the dry-type transformer body 1 is installed, without interfering with the placement of the dry-type transformer body 1 between the two upper shells 16, and facilitating the installation of the dry-type transformer body 1.

[0028] In this embodiment, the transmission device includes a connecting rod 28 hinged to the rear end of the push rod 24 and a lever 29 hinged on the inner bottom wall of the mounting groove 23. The rear end of the connecting rod 28 is hinged to the rear push block 25. Long through slots 30 are provided at both ends of the lever 29. The front push block 25 and the upper end surface of the push rod 24 are fixedly provided with a driving pin 31, and each driving pin 31 is inserted into the corresponding through slot 30; when the push rod 24 moves backward, the push rod 24 pushes the rear push block 25 to move outward through the connecting rod 28 and drives the lever 29 to rotate through the driving pin 31, so that the other end of the lever 29 pushes the front push block 25 to move outward by cooperating with the driving pin 31 of the front push block 25, thereby achieving the purpose of driving both push blocks 25 outward when the push rod 24 moves inward.

[0029] In this embodiment, a first fixing plate 32 is fixedly provided on the left and right sides of the push rod 24, and a second fixing plate 33 is fixedly provided on the inner bottom wall of the mounting groove 23 on both sides of the push rod 24. A return spring 34 is fixedly provided between each first fixing plate 32 and the corresponding second fixing plate 33. The return spring 34 always drives the first fixing plate 32 to move backward, thereby causing the first fixing plate 32 to drive the push rod 24 to move backward. The push rod 24 pushes each L plate 27 to move outward through the two push blocks 25 and the two connecting rods 26 in turn, thereby driving each Each shock-absorbing block 5 moves outward, at this time the connecting rod 26 contacts the vertical portion 38 of each corresponding L-plate 27, and each shock-absorbing block 5 is in a state after moving outward, and the shock-absorbing block 5 is in a failed state, the purpose of which is to facilitate the installation of the dry-type transformer body 1; a locking block 35 is fixedly provided on the front side of the bottom lining plate 22, and a locking bolt 36 is sleeved inside the locking block 35, a threaded hole is provided on the front end surface of the push rod 24, and side grooves 37 are provided on both sides of the front end of the push rod 24; when the dry-type transformer body 1 is installed, it is necessary to release the failed state of the shock-absorbing block 5, through The tool is inserted into the side groove of the push rod 24 and the push rod 24 is pulled outward, so that the push rod 24 contacts the locking block 35. Then, by rotating the locking bolt 36, the locking bolt 36 is screwed into the threaded hole of the push rod 24, so that the locking bolt 36 is threadedly connected to the push rod 24, so that the front end of the push rod 24 is fixed at the locking block 35. At this time, each shock absorber block 5 is in a state of failure release. The specific principle is: the push rod 24 moves forward, and the connecting rod 28, the lever 29 and the driving pin 31 are used in turn to push the two push blocks 25 to move inward towards each other, thereby making The pushing block 25 drives the two connecting rods 26 to move inward, so that the two ends of the two connecting rods 26 are away from the vertical part 38 of the L plate 27 by a set distance. At this time, each shock-absorbing block 5 moves inward under the drive of the shock-absorbing spring 10 and contacts the end of the corresponding bottom beam 3, thereby realizing the shock-absorbing function; during normal use, the shock-absorbing block 5 is subjected to vibration and produces forward and backward displacement, and the vibration is offset by the damping block 8. The L plate 27 follows the forward and backward displacement of the shock-absorbing block 5, which is not enough to contact the connecting rod 26 because the end of the connecting rod 26 is away from the vertical part 38 by a set distance.

[0030] In order to ensure that when all the doors 20 of the outer shell 2 are opened, the upper shell 16 can automatically move outward to a position where the outer side surface contacts the rear side surface of the rib 21, in this embodiment, the outer end of the shock-absorbing spring 10 is fixedly provided with an end plate 39, the upper end surface of the end plate 39 is fixedly provided with a frame 40, the inner side surface of the frame 40 is fixedly provided with the upper shell 16, and the end plate 39 is slidably provided on the inner bottom wall of the outer shell 2 along the front-to-back direction.

[0031] First, in daily use, when each box door 20 on the same side is opened, the outer side surface of each shock-absorbing block 5 is in conflict with the end of the corresponding bottom beam 3, so the shock-absorbing block 5 cannot move inward. At this time, the shock-absorbing spring 10 will push the end plate 39 to move outward, and the end plate 39 drives the frame 40 to move outward, and the frame 40 drives the upper shell 16 to move outward until the outer side surface of the upper shell 16 conflicts with the inner side surface of the rib 21. At this time, the suction pipe 14 is detached from the inner vent 19 of the upper shell 16, which is convenient for daily maintenance, such as when replacing the cross-flow fan 11, it is convenient to disassemble and install the cross-flow fan 11; Secondly, when hoisting the dry-type transformer body 1 into the shell 2, first open each box door 20, then the locking bolt 36 disengages from the push rod 24, so that the return spring 34 drives the first fixed plate 32 to move backward, and then the first fixed plate 32 drives the push rod 24 to move backward, and the push rod 24 pushes each L plate 27 to move outward through the two push blocks 25 and the two connecting rods 26 in turn, thereby driving each shock-absorbing block 5 to move outward. At this time, the connecting rod 26 contacts the vertical portion 38 of each corresponding L plate 27, and each shock-absorbing block 5 is in a state after moving outward; at the same time, since the shock-absorbing block 5 cannot move inward, the shock-absorbing spring 10 can only push the end plate 39 to move outward, the end plate 39 drives the frame 40 to move outward, and the frame 40 drives the upper shell 16 to move outward until the outer side of the upper shell 16 conflicts with the inner side of the rib 21; while each shock-absorbing block 5 moves outward, the two upper shells 16 also move outward at the same time; then, the dry-type transformer is hoisted by the hoisting tool. The main body 1 is installed into the housing 2 from the top; since each shock-absorbing block 5 and the two upper shells 16 are moved outward by a set distance, the dry-type transformer main body 1 can be placed between the two upper shells 16 without interference after being positioned; then a tool is inserted into the side groove 37 of the push rod 24 to pull the push rod 24 outward so that the push rod 24 contacts the locking block 35, and then the locking bolt 36 is rotated so that the locking bolt 36 is screwed into the threaded hole of the push rod 24, so that the locking bolt 36 and the push rod 2 are locked. 4, so that the front end of the push rod 24 is fixed at the locking block 35. At this time, each shock-absorbing block 5 moves inward by a set distance due to the lack of interference from the connecting rod 26 and contacts with the end of the corresponding bottom beam 3, thereby achieving a shock-absorbing effect. At this time, the upper shell 16 is still in a state of moving outward. When the box door 20 is closed, the upper shell 16 will move backward under the push of the box door 20, so that the suction pipe 14 is inserted into the inner vent 19 of the upper shell 16 and can be used normally.

[0032] In order to limit the left and right movement of the bottom beam 3, in this embodiment, two baffles 41 are fixedly provided on the inner bottom wall of the shell 2, and a restricted space 42 is formed between each baffle 41 and the bottom lining plate 22. Each shock-absorbing block 5 is located in the corresponding restricted space 42, and the bottom beam 3 is located in the corresponding restricted space 42; the upper end surface of the baffle 41 is fixed to each lower shell 15; after the dry-type transformer body 1 is installed in the shell 2, the bottom beam 3 of the dry-type transformer body 1 is located in the corresponding restricted space 42, preventing the dry-type transformer body 1 from being displaced in the left and right directions during use; when the dry-type transformer body 1 is in normal use, the left and right directions pass through the restricted space 4 2 limits the left and right displacement of the bottom beam 3, which is a rigid fixation; the front and rear directions are damped by the shock-absorbing blocks 5, which can be displaced front and rear, which is a floating fixation; the up and down directions are limited by the suction pipe 14 inserted into the inner vent 19 of the upper shell 16, which is a rigid fixation; when the dry-type transformer body 1 is in normal use, it is difficult to move in the up and down directions due to gravity. This application only uses the suction pipe 14 inserted into the inner vent 19 of the upper shell 16 to limit it; however, during transportation, the dry-type transformer body 1 needs to be strengthened and fixed by other means, such as ropes, etc.; during normal use, vibration in the up and down directions still exists, and rubber pads can be used to absorb vibration.

[0033] In this embodiment, a cover plate 43 is fixedly provided on the upper end surface of the bottom lining plate 22 to seal the mounting groove 23 .

[0034] In this embodiment, the dry-type transformer body 1 includes several vertically arranged low-voltage coils 44 and high-voltage coils 45 that are nested with each other. The low-voltage coil 44 is nested inside the high-voltage coil 45 and also includes an iron core. The iron core consists of two parallel horizontal cores 46 and several vertical cores fixed between the two horizontal cores 46. The vertical cores are arranged corresponding to the low-voltage coil 44, and a vertical core is inserted in each low-voltage coil 44; each horizontal core 46 is provided with two clamping plates 47, the upper two clamping plates 47 clamp and fix the upper horizontal core 46, and the lower two clamping plates 47 clamp and fix the lower horizontal core 46, and the two bottom beams 3 are fixed along the front-to-back direction on the lower end surfaces of the two clamping plates 47 below; the high-voltage coil 45 is provided with a high-voltage terminal 48, and the low-voltage coil 44 is provided with a low-voltage copper plate 49. The high-voltage terminal 48 and the low-voltage copper plate 49 are used for wiring.

[0035] The working principle of the present invention is as follows: when the dry-type transformer body 1 is hoisted into the housing 2, each box door 20 is first opened, and then the locking bolt 36 is disengaged from the push rod 24, so that the reset spring 34 drives the first fixed plate 32 to move backward, and then the first fixed plate 32 drives the push rod 24 to move backward, and the push rod 24 pushes each L plate 27 to move outward through the two push blocks 25 and the two connecting rods 26 in turn, thereby driving each shock absorber block 5 to move outward. At this time, the connecting rods 26 are all connected to each corresponding L plate 27. The vertical portion 38 is in contact, and each shock-absorbing block 5 is in a state of moving outward; at the same time, since the shock-absorbing block 5 cannot move inward, the shock-absorbing spring 10 can only push the end plate 39 to move outward, and the end plate 39 drives the frame 40 to move outward, and the frame 40 drives the upper shell 16 to move outward until the outer side of the upper shell 16 contacts the inner side of the rib 21; when each shock-absorbing block 5 moves outward, the two upper shells 16 also move outward at the same time; then, the dry-type transformer body 1 is lifted from the shell 2 by a lifting tool. The top of the housing 2 is installed; since each shock-absorbing block 5 and the two upper shells 16 are moved outward by a set distance, the dry-type transformer body 1 can be placed between the two upper shells 16 without interference after being positioned, and the bottom beam 3 is located in the corresponding restricted space 42; then, a tool is inserted into the side groove of the push rod 24 to pull the push rod 24 outward so that the push rod 24 contacts the locking block 35, and then the locking bolt 36 is rotated so that the locking bolt 36 is screwed into the threaded hole of the push rod 24 to achieve the locking bolt. The threaded connection between 36 and the push rod 24 fixes the front end of the push rod 24 at the locking block 35. At this time, each shock-absorbing block 5 moves inward by a set distance due to the lack of interference from the connecting rod 26 and conflicts with the end of the corresponding bottom beam 3, thereby achieving a shock-absorbing effect. At this time, the upper shell 16 is still in a state after moving outward. When the box door 20 is closed, the upper shell 16 will move backward under the push of the box door 20, so that the suction pipe 14 is inserted into the inner vent 19 of the upper shell 16 and can be used normally.

[0036] Secondly, during daily use, when performing normal maintenance, such as disassembling, inspecting or replacing the cross-flow fan 11, the cross-flow fan 11 is not easy to disassemble because the suction pipe 14 is inserted into the inner vent 19 of the upper shell 16. However, after opening each box door 20 on the corresponding side, the outer side surface of each shock-absorbing block 5 now conflicts with the end of the corresponding bottom beam 3, so the shock-absorbing block 5 cannot move inward. At this time, the shock-absorbing spring 10 will push the end plate 39 to move outward, and the end plate 39 drives the frame 40 to move outward, and the frame 40 drives the upper shell 16 to move outward until the outer side surface of the upper shell conflicts with the inner side surface of the rib 21. At this time, the suction pipe 14 is detached from the inner vent 19 of the upper shell 16, which is convenient for daily maintenance, such as when replacing the cross-flow fan 11, it is convenient to disassemble and install the cross-flow fan 11.

[0037] The end plate 39 is designed to slide back and forth, which can meet the needs of installation and also meet the needs of disassembly of the cross-flow fan 11 during daily maintenance without affecting the vibration reduction function.

Claims

1. A novel dry-type transformer with noise reduction, characterized by: The dry-type transformer comprises a body and an outer shell. The body is arranged in the outer shell. Two bottom beams are fixedly provided at the bottom end of the dry-type transformer body in the front-to-back direction. Shock-absorbing components are provided at the four corners of the inner bottom wall of the outer shell. Both ends of each bottom beam are docked with the corresponding shock-absorbing component. The shock-absorbing component offsets the vibration of the dry-type transformer body through the bottom beam.

2. The noise reduction novel dry-type transformer according to claim 1, characterized in that: The shock-absorbing assembly includes a shock-absorbing block that is slidably arranged on the inner bottom wall of the shell in the front-to-back direction, a slider is provided on the outer side of the shock-absorbing block that slides in the up-down direction, a connecting rod is fixedly provided on the outer side of the slider, a damping block is fixedly provided on the outer end of the connecting rod, and the damping block is slidably arranged on a downward inclined surface; a shock-absorbing spring is fixedly provided between the shock-absorbing block and the inner side wall of the shell, and the shock-absorbing spring always pushes the shock-absorbing block to move inward.

3. The noise reduction novel dry-type transformer according to claim 2, characterized in that: The front and rear sides of the shell are both provided with air outlets and air inlets; two cross-flow fans are fixedly provided on the upper end surfaces of the two bottom beams, and an air suction pipe is fixedly provided at the suction port of each cross-flow fan; two air inlet duct assemblies are provided on the front and rear sides of the shell, the inner end of the air inlet duct assembly is connected with the air suction pipe, and the outer end of the air inlet duct assembly is connected with the air inlet; a downward inclined surface is provided on the lower end surface of the air inlet duct assembly; the damping block is arranged to slide along the inclined surface direction with the air inlet duct assembly by cooperating with the downward inclined surface.

4. The noise reduction novel dry-type transformer according to claim 3, characterized in that: The air inlet duct assembly includes a lower shell and an upper shell, and the upper shell is slidably arranged on the upper end surface of the lower shell in the front-to-back direction; the lower shell is fixedly arranged on the outer shell; the outer side surfaces of the upper shell and the lower shell are provided with notches, and the notches of the upper shell and the lower shell together constitute an external vent, and the upper shell and the lower shell are connected with the air inlet of the outer shell through the external vent; the inner side surface of the upper shell is provided with an internal vent, and the upper shell and the lower shell are connected with the air suction duct through the internal vent; a number of doors are installed on the front and rear sides of the outer shell, and the upper and lower parts of each door are respectively provided with an air outlet and an air inlet; ribs are formed between each two adjacent doors, and the ribs are fixedly connected between the top plate and the bottom plate of the outer shell; there is a set gap between the inner side surface of the ribs and the inner side surface of the door, and the inner side surface of the ribs is closer to the outside.

5. The noise reduction novel dry-type transformer according to claim 4, characterized in that: A bottom lining plate is fixedly provided on the inner bottom wall of the shell, and a mounting groove is provided on the upper end surface of the bottom lining plate. A push rod and two push blocks are slidingly provided on the inner bottom wall of the mounting groove along the front-rear direction. A transmission device is provided between the push rod and the two push blocks. The push rod moves backward and pushes the two push blocks to move outward at the same time through the transmission device. A connecting rod is fixedly provided on the outer side surfaces of the two push blocks, and an L-plate is fixedly provided on the outer side surface of each shock-absorbing block. Both end portions of each connecting rod are located on the upper end surface of the corresponding L-plate.

6. The noise-reducing novel dry-type transformer according to claim 5, characterized in that: The transmission device includes a connecting rod hinged to the rear end of the push rod and a lever hinged to the bottom wall of the mounting groove. The rear end of the connecting rod is hinged to the push block on the rear side. Long through slots are provided at both ends of the lever. The upper end surfaces of the front push block and the push rod are fixed with drive pins, and each drive pin is inserted into the corresponding through slot.

7. The noise reduction novel dry-type transformer according to claim 6, characterized in that: The left and right side surfaces of the push rod are fixedly provided with a first fixing plate, the inner bottom wall of the mounting groove is located on both sides of the push rod and a second fixing plate is fixedly provided, a return spring is fixedly provided between each first fixing plate and the corresponding second fixing plate, and the return spring always drives the first fixing plate to move backward; a locking block is fixedly provided on the front side surface of the bottom lining plate, a locking bolt is sleeved inside the locking block, a threaded hole is provided on the front end surface of the push rod, and side grooves are provided on both sides of the front end of the push rod.

8. The noise-reducing novel dry-type transformer according to claim 7, characterized in that: The outer end of the shock-absorbing spring is fixed with an end plate, the upper end surface of the end plate is fixed with a frame, the inner side surface of the frame is fixed to the upper shell, and the end plate is slidably arranged on the inner bottom wall of the shell along the front-back direction.

9. The noise-reducing novel dry-type transformer according to claim 5, characterized in that: Two baffles are fixedly arranged on the inner bottom wall of the shell, and a restricted space is formed between each baffle and the bottom lining plate. Each shock-absorbing block is located in the corresponding restricted space, and the bottom beam is located in the corresponding restricted space; the upper end surface of the baffle is fixed to each lower shell.

10. The noise reduction novel dry-type transformer according to claim 1, characterized in that: The dry-type transformer body includes several vertically arranged low-voltage coils and high-voltage coils that are nested with each other. The low-voltage coil is nested inside the high-voltage coil. It also includes an iron core, which consists of two parallel horizontal cores and several vertical cores fixed between the two horizontal cores. The vertical cores are arranged corresponding to the low-voltage coils, and each low-voltage coil is inserted with a vertical core; each horizontal core is provided with two clamping plates, the upper two clamping plates clamp and fix the upper horizontal core, and the lower two clamping plates clamp and fix the lower horizontal core, and the two bottom beams are fixed along the front-to-back direction on the lower end surfaces of the two lower clamping plates; the high-voltage coil is provided with a high-voltage terminal, and the low-voltage coil is provided with a low-voltage copper plate.

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