An insulated low-noise dry-type transformer

Abstract

The present invention relates to the technical field of transformers, and discloses an insulated low-noise dry-type transformer, comprising a box and a transformer body installed in the box, ventilation holes are arranged on both sides of the box, sound-absorbing cotton is fixed on the inner wall of the ventilation holes, cleaning plates facing the ventilation holes are slidably arranged on both sides of the box, and the cleaning plates are driven to slide by a cleaning mechanism installed on the box. The present invention has the following advantages and effects: while having a noise reduction effect, the ventilation holes can be cleaned regularly, the heat dissipation efficiency can be improved, the transformer body can be protected, and the transformer body can be isolated from the box to prevent electrical accidents such as short circuit and leakage.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to an insulated low-noise dry-type transformer. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When the transformer is cooled by natural air, it can operate continuously for a long time at the rated capacity. When the transformer is cooled by forced air, the output capacity of the transformer can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should not be in long-term continuous overload operation.

[0003] Current dry-type transformers usually use natural air cooling to dissipate heat, that is, ventilation holes are opened on the main shell of the transformer to help air circulation. The heat inside the transformer can be dissipated to the surrounding environment through the through holes of the shell, and the opening of the ventilation holes also allows noise to flow out. If the ventilation holes are covered with dust and debris, it will hinder air flow and cause the internal temperature of the transformer to be too high. Summary of the invention

[0004] The purpose of the present invention is to provide an insulated low-noise dry-type transformer, which has the effects of reducing noise and regularly cleaning ventilation holes to improve heat dissipation efficiency.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an insulated low-noise dry-type transformer, comprising a box body and a transformer main body installed in the box body, ventilation holes are provided on both sides of the box body, sound-absorbing cotton is fixed on the inner wall of the ventilation holes, cleaning plates are slid on both sides of the box body facing the ventilation holes, and the cleaning plates are driven to slide by a cleaning mechanism installed on the box body.

[0006] By adopting the above technical solution, when the noise generated by the operation of the transformer body passes through the ventilation holes, part of the noise will be absorbed by the sound-absorbing cotton, thereby reducing the amount of noise transmitted outward; the cleaning mechanism drives the cleaning plate to move to clean the ventilation holes, effectively preventing the ventilation holes from being covered by dust or debris, ensuring smooth air circulation, thereby improving the heat dissipation efficiency of the transformer and preventing failures.

[0007] The present invention is further configured as follows: a rotating shaft is provided on both sides of the box body for rotation, the cleaning mechanism includes a connecting shaft that slides on the rotating shaft, the cleaning plate is fixed to the connecting shaft and is evenly distributed along the axial direction of the connecting shaft, a cam is rotatably connected to the outer wall surface of the box body, a protrusion is fixed on the cam, a limiting frame is sleeved between the ends of the connecting shaft on both sides, a limiting groove is provided on the limiting frame, the protrusion slides in the limiting groove, and a cleaning motor that drives the cam to rotate is installed on the outer wall surface of the box body.

[0008] By adopting the above technical solution, the cleaning motor drives the cam to rotate, and the cam drives the limit frame to move back and forth horizontally through the protrusion and the limit groove, and then the limit frame pulls multiple cleaning plates on the connecting shaft to move back and forth synchronously to clean the ventilation holes, thereby keeping the ventilation holes clean and unobstructed.

[0009] The present invention is further configured as follows: an inwardly recessed annular groove is provided at the end of the connecting shaft, and annular protrusions embedded in the annular groove are provided at both ends of the limiting frame.

[0010] By adopting the above technical solution, when the limit frame moves horizontally, the annular groove and the connecting shaft are pushed to move horizontally through the annular protrusions at both ends, so as to achieve the effect of reciprocating cleaning of the cleaning plate.

[0011] The present invention is further configured such that: the width of the cleaning plate is smaller than the width between adjacent ventilation holes.

[0012] By adopting the above technical solution, when the cleaning plate and the ventilation holes are staggered, the ventilation holes can be in a fully open state, thereby improving the natural air cooling and heat dissipation efficiency.

[0013] The present invention is further configured as follows: an adjusting mechanism is provided on the outer wall of the box body, and the adjusting mechanism drives the cleaning plate to rotate so that the upper end surface of the cleaning plate abuts against the outer wall of the box body.

[0014] By adopting the above technical solution, in rainy weather, when the cleaning plate rotates to the upper end and abuts against the outer wall of the box, the cleaning plate is inclined to guide the rainwater to flow away from the ventilation holes, which can significantly reduce the possibility of rainwater invading the box through the ventilation holes, thereby protecting the internal components of the box and ensuring the normal operation and long-term stability of the transformer.

[0015] The present invention is further configured as follows: the adjustment mechanism includes a first gear rotatably connected to the box body and a second gear rotatably connected to the box body and meshing with the first gear, the first gear is driven to rotate by an adjustment motor installed on the box body, the first gear and the second gear are both coaxially fixed with a rotating rod rotatable with the box body, and a transmission belt is respectively connected between the two rotating rods and the rotating shafts on both sides.

[0016] By adopting the above technical solution, the motor is adjusted to drive the first gear to rotate, and then the second gear meshing with the first gear rotates in the opposite direction, the two rotating rods rotate in the opposite direction synchronously, and the transmission belt drives the rotating shafts on both sides to rotate in the opposite direction synchronously, and then the rotation of the rotating shafts on both sides drives the connecting shafts on both sides to rotate in the opposite direction, and the upper ends of the cleaning plates on the connecting shafts on both sides are against the outer wall surface of the box body, so as to achieve the purpose of protecting the ventilation holes on both sides of the box body at the same time, preventing rainwater from invading the inside of the box body, and protecting the transformer body inside the box body.

[0017] The present invention is further configured as follows: a slide bar arranged along the axial direction of the rotating shaft is fixed to the rotating shaft, and a slide groove for the slide bar to be embedded and slide is provided in the connecting shaft.

[0018] By adopting the above technical solution, when the rotating shaft rotates, the connecting shaft is driven to rotate synchronously through the cooperation of the slide bar and the slide groove, and the annular groove rotates relative to the annular protrusion; when the limit frame pushes the annular groove and the connecting shaft to reciprocate through the annular protrusion, the slide bar slides relative to the slide groove, making the overall structure more stable.

[0019] The present invention is further configured as follows: cover boxes for covering the cleaning mechanism, the adjusting mechanism and the end of the connecting shaft are fixed on both sides of the box body.

[0020] By adopting the above technical solution, the cover box can protect the cleaning mechanism, the adjustment mechanism, etc. without affecting the ventilation and heat dissipation, thereby extending the service life of the device.

[0021] The present invention is further configured as follows: the bottom of the transformer body is fixed in the box through an insulating block.

[0022] By adopting the above technical solution, the insulating block can stably support the transformer body to prevent it from being displaced or deformed due to vibration or external force during operation. At the same time, the insulating block isolates the transformer body from the box to prevent electrical accidents such as short circuit and leakage.

[0023] The beneficial effects of the present invention are:

[0024] 1. When the noise generated by the transformer body passes through the ventilation holes, part of the noise will be absorbed by the sound-absorbing cotton, thereby reducing the amount of noise transmitted outward;

[0025] 2. The cleaning mechanism drives the cleaning plate to move and clean the ventilation holes, effectively preventing the ventilation holes from being covered by dust or debris, ensuring smooth air circulation, thereby improving the heat dissipation efficiency of the transformer and preventing malfunctions;

[0026] 3. When the cleaning plate and the ventilation holes are interlaced, the ventilation holes can be in a fully open state, improving the efficiency of natural air cooling and heat dissipation;

[0027] 4. In rainy weather, when the cleaning plate rotates to the upper end and contacts the outer wall of the box, the cleaning plate is tilted to guide the rainwater to flow away from the ventilation holes, which can significantly reduce the possibility of rainwater invading the box through the ventilation holes, thereby protecting the internal components of the box and ensuring the normal operation and long-term stability of the transformer;

[0028] 5. The insulating block can stably support the transformer body to prevent it from displacement or deformation due to vibration or external force during operation. At the same time, the insulating block isolates the transformer body from the box to prevent electrical accidents such as short circuit and leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the present invention.

[0032] Figure 3 It is a schematic diagram of the internal structure of the cover box of the present invention.

[0033] Figure 4 It is a schematic diagram of the connection relationship between the limit frame and the cam in the present invention.

[0034] Figure 5 It is a schematic diagram of the connection relationship between the rotating shaft and the connecting shaft in the present invention.

[0035] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0036] In the figure, 1. box body; 2. transformer body; 3. ventilation hole; 4. cleaning plate; 5. cleaning mechanism; 51. connecting shaft; 52. cam; 53. protrusion; 54. limit frame; 55. limit groove; 56. cleaning motor; 57. annular groove; 58. annular protrusion; 6. rotating shaft; 7. adjusting mechanism; 71. first gear; 72. second gear; 73. adjusting motor; 74. rotating rod; 75. transmission belt; 8. slide bar; 9. slide groove; 10. cover box; 11. insulating block. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1, an insulated low-noise dry-type transformer, such as Figure 1-3 As shown, it includes a box body 1 and a transformer main body 2 installed in the box body 1, ventilation holes 3 are arranged on both sides of the box body 1, and sound-absorbing cotton is fixed on the inner wall of the ventilation hole 3. When the noise generated by the transformer main body 2 during operation passes through the ventilation hole 3, part of the noise will be absorbed by the sound-absorbing cotton, thereby reducing the amount of noise propagating outward, and cleaning plates 4 facing the ventilation holes 3 are sliding on both sides of the box body 1, and the cleaning plates 4 are driven to slide by a cleaning mechanism 5 installed on the box body 1, and the cleaning mechanism 5 drives the cleaning plates 4 to move and clean the ventilation holes 3, effectively preventing the ventilation holes 3 from being covered by dust or debris, thereby ensuring smooth air circulation.

[0039] like Figure 3-4 As shown, there are rotating shafts 6 rotating on both sides of the box body 1, and the cleaning mechanism 5 includes a connecting shaft 51 that slides on the rotating shaft 6. The cleaning plates 4 are fixed to the connecting shaft 51 and are evenly distributed along the axial direction of the connecting shaft 51. The outer wall surface of the box body 1 is rotatably connected with a cam 52, and a protrusion 53 is fixed on the cam 52. A limiting frame 54 is sleeved between the ends of the connecting shafts 51 on both sides, and a limiting groove 55 is provided on the limiting frame 54. The protrusion 53 slides in the limiting groove 55. A cleaning motor 56 for driving the cam 52 to rotate is installed on the outer wall surface of the box body 1. The cleaning motor 56 drives the cam 52 to rotate. The cam 52 drives the limiting frame 54 to reciprocate horizontally through the protrusion 53 and the limiting groove 55, and then the limiting frame 54 pulls the multiple cleaning plates 4 on the connecting shaft 51 to synchronously reciprocate to clean the ventilation holes 3, so as to keep the ventilation holes 3 clean and unobstructed.

[0040] like Figure 4-6 As shown, an inwardly recessed annular groove 57 is provided at the end of the connecting shaft 51, and annular protrusions 5853 embedded in the annular groove 57 are provided at both ends of the limiting frame 54. When the limiting frame 54 moves horizontally, the annular protrusions 5853 at both ends push the annular groove 57 and the connecting shaft 51 to move horizontally.

[0041] like Figure 1 As shown, the width of the cleaning plate 4 is smaller than the width between adjacent ventilation holes 3, so that when the cleaning plate 4 and the ventilation holes 3 are staggered, the ventilation holes 3 can be in a fully open state to maintain natural ventilation and heat dissipation.

[0042] like Figure 2As shown, an adjusting mechanism 7 is provided on the outer wall of the box body 1, and the adjusting mechanism 7 drives the cleaning plate 4 to rotate so that the upper end surface of the cleaning plate 4 abuts against the outer wall surface of the box body 1. In rainy weather, when the cleaning plate 4 rotates to the upper end to abut against the outer wall surface of the box body 1, the cleaning plate 4 is in an inclined state, guiding the rainwater to flow away from the ventilation hole 3, which can significantly reduce the possibility of rainwater invading the box body 1 through the ventilation hole 3, thereby protecting the internal components of the box body 1.

[0043] like Figure 2 , Figure 5 As shown, the adjusting mechanism 7 includes a first gear 71 rotatably connected to the box body 1 and a second gear 72 rotatably connected to the box body 1 and meshing with the first gear 71. The first gear 71 is driven to rotate by an adjusting motor 73 installed on the box body 1. The first gear 71 and the second gear 72 are coaxially fixed with a rotating rod 74 rotatable on the box body 1. The two rotating rods 74 are respectively sleeved with a transmission belt 75 between the rotating shafts 6 on both sides. The rotating shaft 6 is fixed with a slide bar 8 arranged along its axial direction. A slide groove 9 is provided in the connecting shaft 51 for the slide bar 8 to be embedded and slide. The adjusting motor 73 drives the first gear 71 to rotate, and then the second gear 72 meshing with the first gear 71 rotates in the opposite direction. The two rotating rods 74 rotate synchronously in the opposite direction, and the rotating shafts 6 on both sides are driven to rotate synchronously in the opposite direction through the transmission belt 75. Then, the rotating shafts 6 on both sides rotate and cooperate with the slide groove 9 and the slide bar 8 to drive the connecting shafts 51 on both sides to rotate in the opposite direction. The upper ends of the cleaning plates 4 on the connecting shafts 51 on both sides are against the outer wall surface of the box body 1, so as to achieve the purpose of protecting the ventilation holes 3 on both sides of the box body 1 at the same time.

[0044] like Figure 1 As shown, cover boxes 10 for covering the cleaning mechanism 5, the adjusting mechanism 7 and the end of the connecting shaft 51 are fixed on both sides of the box body 1. The cover box 10 can protect the cleaning mechanism 5, the adjusting mechanism 7, etc. without affecting ventilation and heat dissipation.

[0045] like Figure 2 As shown, the bottom of the transformer body 2 is fixed in the box body 1 by an insulating block 11. The insulating block 11 can stably support the transformer body 2 and isolate the transformer body 2 from the box body 1 to prevent electrical accidents such as short circuit and leakage.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulated low-noise dry-type transformer, comprising a box (1) and a transformer body (2) installed in the box (1), characterized in that: Ventilation holes (3) are provided on both sides of the box body (1), and sound-absorbing cotton is fixed to the inner wall of the ventilation holes (3). Cleaning plates (4) facing the ventilation holes (3) are slidably provided on both sides of the box body (1), and the cleaning plates (4) are driven to slide by a cleaning mechanism (5) installed on the box body (1).

2. The insulated low-noise dry-type transformer according to claim 1, characterized in that: Rotating shafts (6) are rotatably provided on both sides of the box body (1); the cleaning mechanism (5) comprises a connecting shaft (51) sliding on the rotating shaft (6); the cleaning plates (4) are fixed on the connecting shaft (51) and are evenly distributed along the axial direction of the connecting shaft (51); a cam (52) is rotatably connected to the outer wall surface of the box body (1); a protrusion (53) is fixed on the cam (52); a limiting frame (54) is sleeved between the ends of the connecting shaft (51) on both sides; a limiting groove (55) is provided on the limiting frame (54); the protrusion (53) slides in the limiting groove (55); and a cleaning motor (56) for driving the cam (52) to rotate is installed on the outer wall surface of the box body (1).

3. The insulated low-noise dry-type transformer according to claim 2, characterized in that: An inwardly recessed annular groove (57) is provided at the end of the connecting shaft (51), and annular protrusions (58) (53) embedded in the annular groove (57) are provided at both ends of the limiting frame (54).

4. The insulated low-noise dry-type transformer according to claim 3, characterized in that: The width of the cleaning plate (4) is smaller than the width between adjacent ventilation holes (3).

5. The insulated low-noise dry-type transformer according to claim 4, characterized in that: The outer wall surface of the box body (1) is provided with an adjustment mechanism (7), and the adjustment mechanism (7) drives the cleaning plate (4) to rotate so that the upper end surface of the cleaning plate (4) abuts against the outer wall surface of the box body (1).

6. The insulated low-noise dry-type transformer according to claim 5, characterized in that: The adjusting mechanism (7) comprises a first gear (71) rotatably connected to the housing (1) and a second gear (72) rotatably connected to the housing (1) and meshing with the first gear (71); the first gear (71) is driven to rotate by an adjusting motor (73) mounted on the housing (1); the first gear (71) and the second gear (72) are both coaxially fixed with a rotating rod (74) rotatable on the housing (1); and a transmission belt (75) is respectively sleeved between the two rotating rods (74) and the rotating shafts (6) on both sides.

7. The insulated low-noise dry-type transformer according to claim 6, characterized in that: The rotating shaft (6) is fixed with a slide bar (8) arranged along its axial direction, and the connecting shaft (51) is provided with a slide groove (9) for the slide bar (8) to be embedded and slide.

8. The insulated low-noise dry-type transformer according to claim 7, characterized in that: Cover boxes (10) for covering the cleaning mechanism (5), the adjusting mechanism (7) and the end of the connecting shaft (51) are fixed on both sides of the box body (1).

9. The insulated low-noise dry-type transformer according to claim 1, characterized in that: The bottom of the transformer body (2) is fixed in the box (1) via an insulating block (11).

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