Flame-retardant power transformer with improved stability during operation

Abstract

The present application relates to the technical field of power transformer, and discloses a flame-retardant power transformer capable of improving stability during operation, which comprises a protective shell, a transformer main body is installed in the protective shell, a cooling fan is installed at the bottom of the transformer main body, a protective cover is fixedly connected to the bottom of the protective shell, two air inlet members are symmetrically arranged in the protective cover, a dust removal mechanism is arranged on the air inlet member, a driving unit is installed on the protective cover, and the driving unit is used for driving the air inlet member and the dust removal mechanism to rotate. The arc-shaped seat shields part of the position of the dust ring net, part of the airflow enters the arc-shaped seat and the arc-shaped groove when the air inlet member inhales air, the horizontal movement of the part of the airflow is changed into vertical movement, and the airflow blows towards the interception surface of the dust ring net, so that the impurities intercepted on the surface of the dust ring net are blown downwards into the air guide pipe and discharged to the outside, thereby realizing contactless cleaning, avoiding workpiece loss, and reducing working noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transformers, in particular to a flame-retardant power transformer capable of improving stability during operation. BACKGROUND

[0002] A power transformer is a kind of static electrical equipment that converts an AC voltage (current) of a certain value into a voltage (current) of the same frequency but different value through electromagnetic induction, wherein a dry-type power transformer adopts an oil-free design and uses epoxy resin as an insulating medium, so that it can be applied to places with strict fireproof requirements.

[0003] A dry-type power transformer mainly consists of a core, a winding, an insulation system, a cooling device, and a shell. The shell has through holes at its upper and lower ends for air intake and heat dissipation. When used in outdoor environments, the transformer is prone to high-temperature working conditions. If the through holes of the shell are small, air intake and heat dissipation will be difficult, resulting in that the inside of the shell cannot be cooled to an ideal temperature environment, affecting the stable operation of the transformer. If the through holes of the shell are large, a protective net needs to be arranged at the through holes for intercepting and protecting external impurities. However, the protective net may be clogged during long-term use, so it needs to be cleaned or replaced regularly. The patent with the publication number CN119028701A discloses a dry-type power transformer. When air enters, the dust and the like are intercepted by the dustproof part, and the dustproof part is vibrated up and down by the circulating unit. On the one hand, the adhesion of dust on the dustproof part can be reduced, and the dust on the dustproof part can be cleaned by the cleaning part. In this way, the dustproof effect of the dustproof part is ensured, and the influence of dust on air intake is reduced, which is beneficial to the cooling of the transformer.

[0004] However, the existing technology still has the following defects: the dust on the surface of the dustproof plate is removed by the scraper, but the cleaned dust will still be adsorbed on one side of the air inlet surface of the dustproof plate under the action of suction, and cannot fall off. In addition, the scraper and the dustproof plate are in frictional contact, which not only produces working noise, but also causes workpiece wear and tear, resulting in the need for regular replacement and maintenance. SUMMARY

[0005] In view of the problems of noise and workpiece wear and tear during cleaning of the dustproof plate in the prior art, a flame-retardant power transformer capable of improving stability during operation is proposed.

[0006] The purpose is to shield the dustproof ring net by the dust blowing assembly, use part of the wind force in the air intake piece to blow down the interception surface of the dustproof ring net, and remove the impurities on the dustproof ring net, so as to realize contactless and low-noise cleaning.

[0007] The technical scheme of the present application is a fire-retardant power transformer capable of improving stability during operation, comprising a protective shell, wherein a transformer main body is installed in the protective shell, a cooling fan is installed at the bottom of the transformer main body, a protective cover is fixedly connected to the inner bottom of the protective shell, two air inlet members are symmetrically arranged in the protective cover, and a dust removal mechanism is arranged on the air inlet member.

[0008] The air inlet member comprises two vertically concentric circular plates, a plurality of air deflectors are fixedly connected between the two circular plates in a ring shape at equal intervals, a dustproof ring net is fixedly connected to the inner ring wall of the upper circular plate and extends downward, and the lower circular plate is rotatably connected to the shell bottom of the protective shell.

[0009] The dust removal mechanism comprises a dust blowing assembly, the dust blowing assembly comprises a rotating plate in the form of a circular plate arranged at the bottom of the lower circular plate, an arc-shaped seat in a hollow structure is fixedly connected to the top surface of the rotating plate, the arc-shaped seat is arranged close to the outer sidewall of the dustproof ring net, air inlets are arranged at both ends of the outer arc side of the arc-shaped seat, an air guide opening is arranged at the middle of the inner arc side of the arc-shaped seat, a wind guide pipe is fixedly connected to the bottom of the arc-shaped seat, the wind guide pipe fixedly penetrates through the rotating plate and extends downward, the arc-shaped seat shields the position of the dustproof ring net, when the air inlet member rotates, part of the air flow is intercepted by the air inlet and flows into the wind guide pipe through the air guide opening, and the position of the dustproof ring net that is shielded is blown and dusted.

[0010] A driving unit is installed on the protective cover, and the driving unit is used to drive the air inlet member and the dust removal mechanism to rotate.

[0011] According to the above technical scheme, the driving unit drives the air inlet member and the dust blowing assembly to rotate respectively, the adjacent two air deflectors and the two circular plates cooperate to form an inclined air inlet channel, the air inlet channel gathers the air at the outer periphery to the middle part when rotating, the air flows upward into the cooling fan after being filtered by the dustproof ring net, when the arc-shaped seat is located at one side of the dustproof ring net, the arc-shaped seat blocks the air inlet channel outside the position, so that the dustproof ring net at the position cannot flow with air, and part of the air flow generated by the remaining air inlet channels enters the arc-shaped seat through the air inlet, and the part of the air flow flows downward under the action of the wind guide pipe, the air flow passes through the air guide opening in the process of flowing downward, the air guide opening is communicated with the dustproof ring net, so that the air flow flowing downward can blow the surface of the dustproof ring net at the position, the dirt adhered to the position is discharged through the wind guide pipe along with the air flow, and the dustproof ring net is cleaned in real time in a non-contact manner.

[0012] Further, two through holes are symmetrically formed in the top of the protective cover, the dustproof ring net is concentrically arranged with the through holes, the upper circular plate is in rotational contact with the protective cover, the bottom of the lower circular plate is rotatably connected with a base one in the form of an arc of a circle, and the base one is fixedly connected to the inner bottom of the protective shell.

[0013] The base one is fixedly connected with a plurality of base twos at equal intervals in a ring shape, and the rotating plate is rotationally connected with the base twos.

[0014] The base one rotationally limits the air inlet, and the base two rotationally limits the dust blowing assembly.

[0015] Further, a plurality of air guide covers are arranged at equal intervals in a ring shape between the two annular plates, the air guide cover is arranged between two adjacent air guide plates, one end of the air guide cover is rotationally connected with the annular plate, and the air guide cover and an air guide plate are jointly connected with an elastic member.

[0016] When the centrifugal force generated by the rotation of the air inlet is greater than the tension of the elastic member, the air guide cover is rotationally opened outward under the action of the centrifugal force, and the air inlet amount of the air inlet channel can be increased.

[0017] Further, the inner wall of the outer arc side of the arc-shaped seat is fixedly connected with an arc-shaped block, and the arc-shaped block is provided with an air guide inclined surface at both ends.

[0018] The above technical scheme can make the airflow flow quickly to the air guide opening through the inclined surface of the arc-shaped block, and the space of the cavity at the air guide opening can be reduced by arranging the arc-shaped block, so that the airflow speed at the air guide opening can be increased without changing the airflow speed at the air inlet, thereby increasing the air blowing capacity on the surface of the dust ring net.

[0019] Further, the dust blowing assembly further comprises an arc-shaped groove plate arranged close to the inner side wall of the dust ring net, the arc-shaped groove plate is fixedly connected with the rotating plate, and the rotating plate is provided with an air guide groove in communication with the arc-shaped seat and the arc-shaped groove plate.

[0020] The arc-shaped seat is horizontally fixedly connected with a partition plate.

[0021] The above technical scheme can divide the cavity of the arc-shaped seat into two layers by the partition plate, a part of the airflow enters the upper layer cavity to blow downward on the dust ring net, and another part of the airflow enters the lower layer cavity to enter the arc-shaped groove plate through the air guide groove, and then the airflow passes through the mesh holes of the dust ring net and moves to the upper layer cavity to blow from the inner side to the outer side of the dust ring net, thereby improving the dust removal effect on the dust ring net and effectively preventing sundries from adhering to the dust ring net.

[0022] Furthermore, the drive unit includes a motor fixedly installed through the protective cover. A gear one is fixedly connected to the output end of the motor. A gear two is meshed with one side of the gear one. Two meshing gear threes are provided on both sides of the gear two. The gear two meshes with the adjacent gear three. The gear two and gear three are rotatably connected to the bottom of the protective shell. An internal gear ring is fixedly connected to the bottom of the lower annular plate. An external gear ring is fixedly connected to the outer annular wall of the rotating plate. The internal gear ring and the external gear ring mesh with the corresponding gear three.

[0023] Using the above technical solution, when the motor rotates, the internal gear ring and the external gear ring rotate in the same direction through the cooperation of gear one and gear two, and gear two and gear three. The dust blowing component follows the air inlet component and rotates in the same direction but at different speeds. This increases the contact time between the dust blowing component and the same part of the dustproof ring mesh, allowing for long-term blowing of the same location on the dustproof ring mesh, ensuring that debris on the surface of the dustproof ring mesh can be blown away.

[0024] Furthermore, the bottom of the protective shell and the outer side of the air inlet are provided with multiple arc-shaped holes, and the bottom of the protective shell and the lower side of the rotating plate are provided with a round hole. The air guide pipe passes through the round hole and extends to the lower side of the protective shell.

[0025] Using the above technical solution, multiple arc-shaped holes are arranged in a ring at equal intervals on the outer periphery of the air inlet, allowing outside air to enter the protective cover through the arc-shaped holes and be drawn out by the rotating air inlet. The debris discharged by the dust blowing component is discharged to the outside again through the air guide pipe.

[0026] Furthermore, the dust removal mechanism also includes a pressurization component, which includes a pressurization pipe fixedly connected to the lower end of the air guide duct. The pressurization pipe is composed of a rectangular tube body and a bucket-shaped tube body.

[0027] With the above technical solution, the air duct is connected to the rectangular tube body, and the hopper-shaped tube body and the dust blowing component are set in the same direction of rotation. When the dust blowing component rotates, the hopper-shaped tube body introduces outside air into the rectangular tube body. Since the internal space of the hopper-shaped tube body is larger than the internal space of the rectangular tube body, the air velocity increases when it moves in the rectangular tube body, thereby improving the exhaust speed of the air duct and further improving the dust collection effect at the air duct.

[0028] Furthermore, a baffle is rotatably connected to one side of the rectangular tube facing the bucket-shaped tube, and a dust removal component is rotatably connected to the other side of the rectangular tube. The dust removal component includes an arc-shaped intercepting plate and a T-shaped plate fixedly connected to the lower end of the intercepting plate. The intercepting plate has multiple intercepting holes, and one end of the T-shaped plate abuts against the booster pipe.

[0029] Using the above technical solution, when the pressurizing component rotates, the baffle and T-shaped plate are automatically rotated by the wind force, opening the pressurizing pipe port. At this time, the right end of the T-shaped plate contacts the bottom of the pressurizing pipe, and the interceptor plate blocks the exhaust port of the pressurizing pipe, preventing debris discharged from the duct from being directly discharged and then re-entering the air inlet. When the pressurizing component is stationary, the baffle is vertically set under the action of gravity, and the interceptor plate rotates clockwise under the action of gravity, causing the left end of the T-shaped plate to abut against the pressurizing pipe. This provides shielding and protection for both ends of the pressurizing pipe, preventing foreign objects from entering the pressurizing pipe. At the same time, debris on the surface of the interceptor plate can fall downwards.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. By partially blocking the dustproof ring mesh with an arc-shaped seat, the blocked portion of the dustproof ring mesh does not intercept impurities. When the air inlet is inlet, part of the airflow enters the arc-shaped seat and arc-shaped groove. By changing the horizontal movement of this part of the airflow to vertical movement and blowing it towards the interception surface of the dustproof ring mesh, the impurities intercepted on the surface of the dustproof ring mesh can be blown downwards into the air guide pipe and discharged to the outside. This achieves non-contact cleaning, avoids workpiece damage, and reduces working noise.

[0032] 2. When the booster pipe rotates with the dust blowing assembly, it draws in and compresses outside air, causing the air to flow faster inside the booster pipe. This creates a suction effect on the air duct, thereby further increasing the cleaning effect on the dustproof ring at the air duct.

[0033] 3. When the interceptor plate is set vertically, it can intercept the discharged impurities, preventing them from being directly discharged to the outside and then re-inhaled by the air inlet. When the air inlet stops rotating, the outer arc surface of the interceptor plate is set downwards, which can automatically discharge the intercepted impurities downwards. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0035] Figure 2 This is a schematic cross-sectional view of the protective shell and protective cover structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the air inlet structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the dustproof ring net, arc-shaped seat, and arc-shaped groove plate structure of the present invention;

[0038] Figure 5 This is a schematic diagram of the unfolded state of the air guide shroud structure of the present invention;

[0039] Figure 6 This is a schematic diagram of the dust blowing assembly structure of the present invention;

[0040] Figure 7 This is a disassembly diagram of the arc-shaped seat and arc-shaped operating structure of the present invention;

[0041] Figure 8 This is a schematic diagram of the drive unit structure of the present invention;

[0042] Figure 9 This is a schematic diagram of the supercharging component structure of the present invention;

[0043] Figure 10 This is a schematic diagram of the working state of the baffle and interceptor plate structure of the present invention.

[0044] In the picture:

[0045] 1. Protective shell; 2. Transformer body; 3. Air cooler; 4. Drive unit; 41. Motor; 42. Gear 1; 43. Gear 2; 44. Gear 3; 45. Internal gear ring; 46. External gear ring; 5. Protective cover; 6. Air inlet component; 61. Circular ring plate; 62. Air guide plate; 63. Dustproof ring mesh; 64. Air guide cover; 7. Dust blowing assembly; 71. Rotating plate; 72. Arc-shaped seat; 73. Air guide pipe; 74. Arc-shaped block; 75. Partition plate; 76. Arc-shaped groove plate; 8. Pressurization assembly; 81. Pressurization pipe; 82. Baffle; 83. Interception plate; 84. T-shaped plate; 9. Base 1; 10. Base 2. Detailed Implementation

[0046] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Example 1, referring to Figures 1-6This is the first embodiment of the present invention, providing a flame-retardant power transformer that can improve stability during operation. It includes a protective shell 1, a transformer body 2 installed inside the protective shell 1, a cooler 3 installed at the bottom of the transformer body 2, a protective cover 5 fixedly connected to the bottom of the protective shell 1, two symmetrically arranged air inlets 6 inside the protective cover 5, and a dust removal mechanism on each air inlet 6. Each air inlet 6 includes two vertically concentric annular plates 61, with multiple air guide plates 62 fixedly connected at equal intervals between the two annular plates 61. A dustproof ring mesh 63 extends downwards and is fixedly connected to the inner ring wall of the upper annular plate 61, and the lower annular plate 61 is rotatably connected to the bottom of the protective shell 1. The dust removal mechanism includes a dust blowing assembly 7, which includes components disposed on the lower... The bottom of the circular plate 61 is a rotating plate 71 in the shape of a circular plate. The top surface of the rotating plate 71 is fixedly connected to an arc-shaped seat 72 with a cavity structure. The arc-shaped seat 72 is located close to the outer wall of the dustproof ring net 63. Both ends of the outer arc side of the arc-shaped seat 72 are provided with air inlets, and the middle of the inner arc side of the arc-shaped seat 72 is provided with an air guide. The bottom of the arc-shaped seat 72 is fixedly connected to an air guide pipe 73. The air guide pipe 73 is fixedly passed through the rotating plate 71 and extends downward. The arc-shaped seat 72 blocks the position of the dustproof ring net 63. When the air inlet 6 rotates, the air inlet intercepts part of the wind force and flows through the air guide pipe 73 to blow and remove dust from the blocked position of the dustproof ring net 63. The protective cover 5 is equipped with a drive unit 4, which is used to drive the air inlet 6 and the dust removal mechanism to rotate.

[0048] Specifically, the drive unit 4 drives the air inlet component 6 and the dust blowing component 7 to rotate. The two adjacent air guide plates 62 and the two circular plates 61 cooperate to form an oblique air inlet channel. When the air inlet channel rotates, it gathers the air from the outer periphery to the center. After being filtered by the dustproof ring net 63, the air flows upward into the air cooler 3. When the arc-shaped seat 72 is located on one side of the dustproof ring net 63, the arc-shaped seat 72 blocks the air inlet channel on the outer side of that position, so that the dustproof ring net 63 at that position cannot have air flow. At the same time, part of the airflow generated by the other air inlet channels enters the arc-shaped seat 72 through the air inlet. Under the action of the air guide pipe 73, this part of the airflow flows downward. During the downward flow of the airflow, it passes through the air guide port. Since the air guide port is connected to the dustproof ring net 63, the downward airflow can blow on the surface of the dustproof ring net 63 at that position, so that the debris adhering there is discharged through the air guide pipe 73 with the airflow, realizing real-time non-contact cleaning of the dustproof ring net 63.

[0049] Among them, reference Figure 1 The protective shell 1 includes a shell, legs, and a top cover. A protective door (not shown in the figure) is hinged to one side of the shell. The top cover is detachably connected to the upper end of the shell, and air vents are symmetrically opened on both sides of the top cover. When the top cover is not connected to the shell, the transformer body 2 enters the shell from the upper end of the shell by hoisting and is connected and fixed to the top of the protective cover 5 by a support.

[0050] Reference Figure 2 , Figure 3 and Figure 8 The top of the protective cover 5 has two symmetrical through holes. The dustproof ring mesh 63 is concentric with the through holes. The upper circular plate 61 is in rotatable contact with the protective cover 5. The bottom of the lower circular plate 61 is rotatably connected to a base 9 with an arc-shaped structure. The base 9 is fixedly connected to the bottom of the protective shell 1. Multiple bases 10 are fixedly connected in a ring at equal intervals inside the base 9. The rotating plate 71 is rotatably connected to the bases 10.

[0051] Specifically, base 1 9 limits the rotation of the air inlet 6, and base 2 10 rotates the dust blowing assembly 7. With the protective cover 5 in place, outside air enters the air inlet 6 through the bottom of the protective shell 1. After passing through the dustproof ring 63, the outside air continues to move upward through the top through hole of the protective cover 5.

[0052] Understandably, the top surfaces of base 19 and base 20 are connected by multiple rollers in a ring with equal spacing, which makes the air inlet 6 and dust blowing assembly 7 rotate more smoothly and reduces working noise.

[0053] Reference Figures 4-5 Multiple air guide hoods 64 are provided in a ring at equal intervals between two annular plates 61. The air guide hoods 64 are located between two adjacent air guide plates 62. One end of the air guide hood 64 is rotatably connected to the annular plate 61, and the air guide hood 64 and an air guide plate 62 are connected together by an elastic element.

[0054] Specifically, when the centrifugal force generated by the rotation of the air inlet 6 is greater than the tension of the elastic element, the air guide 64 is rotated outward and opened by the centrifugal force, which can increase the air volume of the air inlet channel. When the air inlet 6 is stationary, the elastic element drives the air guide 64 to abut against the air guide plate 62, which blocks the air inlet channel and prevents foreign objects from entering.

[0055] The air guide shroud 64 includes an L-shaped plate, one end of which is rotatably connected to two annular plates 61. A rib is fixedly connected to the side of the L-shaped plate facing the annular plates 61. The L-shaped plate and the rib cooperate to form a bucket-shaped structure, which can help increase the air intake. The elastic element can be any component that can automatically reset after being stretched. In this technical solution, a tension spring is preferred.

[0056] Reference Figure 6 An arc-shaped block 74 is fixedly connected to the inner wall of the outer arc side of the arc-shaped seat 72, and both ends of the arc-shaped block 74 are provided with air guide slopes.

[0057] Specifically, part of the airflow in the air inlet channel enters the cavity of the arc-shaped seat 72 from the air inlet, and moves through the air guide and into the air guide duct 73. The inclined surface of the arc-shaped block 74 can make the airflow flow quickly to the air guide. At the same time, the setting of the arc-shaped block 74 can reduce the cavity space at the air guide, so that the gas velocity at the air guide can be increased without changing the airflow velocity at the air inlet, thereby increasing the blowing capacity on the surface of the dustproof ring mesh 63.

[0058] Reference Figure 8 The drive unit 4 includes a motor 41 fixedly installed through the protective cover 5. A gear 42 is fixedly connected to the output end of the motor 41. A gear 43 is meshed on one side of the gear 42. Two gears 44 mesh with each other on both sides of the gear 43. The gear 43 meshes with the adjacent gear 44. The gears 43 and 44 are rotatably connected to the bottom of the protective shell 1. An internal gear ring 45 is fixedly connected to the bottom of the lower annular plate 61. An external gear ring 46 is fixedly connected to the outer annular wall of the rotating plate 71. The internal gear ring 45 and the external gear ring 46 mesh with the corresponding gear 44.

[0059] Specifically, when the motor 41 rotates, the gear 1 42 and gear 2 43, and gear 2 43 and gear 3 44 work together to drive the inner gear ring 45 and the outer gear ring 46 to rotate in the same direction. The dust blowing assembly 7 follows the air inlet 6 to rotate in the same direction but at different speeds, which can increase the contact time between the dust blowing assembly 7 and the same part of the dustproof ring 63, so that the same position of the dustproof ring 63 can be blown for a long time, ensuring that the debris on the surface of the dustproof ring 63 can be blown away.

[0060] It is understandable that the motor 41 works synchronously with the air cooler 3. That is, when the air cooler 3 needs to work to blow air to cool the transformer body 2, the motor 41 rotates synchronously to draw outside air into the protective shell 1.

[0061] Reference Figure 2 and Figure 8 Multiple arc-shaped holes are provided at the bottom of the protective shell 1 and on the outside of the air inlet 6. A round hole is provided at the bottom of the protective shell 1 and on the lower side of the rotating plate 71. The air duct 73 passes through the round hole and extends to the lower side of the protective shell 1.

[0062] Specifically, multiple arc-shaped holes are arranged in a ring at equal intervals around the outer periphery of the air inlet 6, allowing outside air to enter the protective cover 5 through the arc-shaped holes and be drawn out by the rotation of the air inlet 6. The debris discharged by the dust blowing assembly 7 is discharged to the outside again through the air guide pipe 73.

[0063] Example 2, refer to Figure 4 , Figure 6 and Figure 7This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the dust blowing assembly 7 further includes an arc-shaped groove plate 76 disposed near the inner side wall of the dustproof ring net 63. The arc-shaped groove plate 76 is connected and fixed to the rotating plate 71, and the rotating plate 71 is provided with an air guide groove that communicates with the arc-shaped seat 72 and the arc-shaped groove plate 76. A partition plate 75 is horizontally fixedly connected inside the arc-shaped seat 72.

[0064] Specifically, the cavity of the arc-shaped seat 72 can be divided into upper and lower layers by the partition 75. After a part of the airflow enters the upper cavity, it blows the dustproof ring net 63 downwards. The other part of the airflow enters the lower cavity and enters the arc-shaped groove plate 76 through the air guide groove. Then the airflow passes through the mesh of the dustproof ring net 63 and moves to the upper cavity, realizing the blowing from the inside to the outside of the dustproof ring net 63, improving the dust removal effect of the dustproof ring net 63, and effectively preventing debris from adhering to the dustproof ring net 63. The rest of the structure is the same as the structure of Embodiment 1.

[0065] Example 3, referring to Figures 9-10 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that the dust removal mechanism further includes a pressurization component 8. The pressurization component 8 includes a pressurization pipe 81 fixedly connected to the lower end of the air guide pipe 73. The pressurization pipe 81 is composed of a rectangular pipe body and a bucket-shaped pipe body.

[0066] Specifically, the air duct 73 is connected to the rectangular tube body, and the hopper-shaped tube body and the dust blowing assembly 7 are arranged in the same direction of rotation. When the dust blowing assembly 7 rotates, the hopper-shaped tube body introduces outside air into the rectangular tube body. Since the internal space of the hopper-shaped tube body is larger than the internal space of the rectangular tube body, the air velocity increases when it moves in the rectangular tube body, thereby improving the exhaust speed of the air duct 73 and further improving the dust collection effect at the air duct.

[0067] Reference Figures 9-10 A baffle 82 is rotatably connected to one side of the rectangular tube facing the bucket-shaped tube, and a dust removal component is rotatably connected to the other side of the rectangular tube. The dust removal component includes an arc-shaped intercepting plate 83 and a T-shaped plate 84 fixedly connected to the lower end of the intercepting plate 83. Multiple intercepting holes are provided on the intercepting plate 83, and one end of the T-shaped plate 84 abuts against the booster pipe 81.

[0068] Specifically, when the pressurizing component 8 rotates, the baffle 82 and T-shaped plate 84 are automatically rotated by the wind force, causing the port of the pressurizing pipe 81 to open. At this time, the right end of the T-shaped plate 84 contacts the bottom of the pressurizing pipe 81, and the intercepting plate 83 blocks the exhaust port of the pressurizing pipe 81, which can prevent the debris discharged from the air guide pipe 73 from being directly discharged and re-entering the air inlet 6. When the pressurizing component 8 is stationary, the baffle 82 is set vertically under the action of gravity, and the intercepting plate 83 rotates clockwise under the action of gravity, causing the left end of the T-shaped plate 84 to abut against the pressurizing pipe 81. This provides protection for both ports of the pressurizing pipe 81, preventing foreign objects from entering the pressurizing pipe 81. At the same time, debris on the surface of the intercepting plate 83 can fall downwards.

[0069] It is understandable that when the booster pipe 81 rotates, the gas flow velocity inside the rectangular pipe is greater than the outside air flow velocity, which makes the airflow thrust greater than the weight of the T-shaped plate 84 and the interceptor plate 83, causing the T-shaped plate 84 and the interceptor plate 83 to rotate.

[0070] In addition, the interceptor plate 83 is arranged in an arc shape. On the one hand, when it blocks the exhaust port of the booster pipe 81, it can increase the contact area between the airflow and the interceptor plate 83, so that the gas can be quickly discharged to the outside. On the other hand, when the arc-shaped surface of the interceptor plate 83 is set downward, it can prevent impurities from adhering to the surface of the interceptor plate 83, and the outside air can carry away the impurities on the surface of the interceptor plate 83 when it flows. The rest of the structure is the same as that of Embodiment 2.

[0071] Based on embodiments 1-3, the working principle of this invention is as follows: The motor 41 rotates, causing the two air inlets 6 to rotate in opposite directions. This causes the air guide shroud 64 to cooperate with the air inlet channel to draw in outside air through the dustproof ring mesh 63 and into the protective shell 1. The air cooler 3 draws in filtered air to cool the transformer body 2. The outer arc side of the arc-shaped seat 72 blocks one of the air inlets. The air inlet of the arc-shaped seat 72 intercepts part of the airflow entering the cavity, and part of the airflow enters the upper cavity and then blows the dustproof ring mesh 63 towards... One part of the airflow enters the lower cavity and then enters the arc-shaped trough plate 76 through the air guide groove. Subsequently, the airflow passes through the mesh of the dustproof ring net 63 and moves to the upper cavity, thereby blowing out the impurities intercepted by the dustproof ring net 63. When the booster pipe 81 rotates synchronously with the dust blowing component 7, the outside air enters the bucket-shaped pipe and is compressed before entering the rectangular pipe, which increases the air velocity in the rectangular pipe, improves the exhaust speed of the air guide pipe 73, and enhances the dust collection effect at the air guide port.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A flame-retardant power transformer that improves stability during operation, comprising a protective shell, a transformer body installed inside the protective shell, and a cooling fan installed at the bottom of the transformer body, characterized in that: A protective cover is fixedly connected to the bottom of the protective shell. Two air inlets are symmetrically arranged inside the protective cover, and a dust removal mechanism is provided on the air inlets. The top of the protective cover has two symmetrical through holes. The dustproof ring mesh is concentric with the through holes. The upper circular plate is in rotatable contact with the protective cover. The bottom of the lower circular plate is rotatably connected to a base with an arc-shaped structure. The base is fixedly connected to the bottom of the protective shell. Multiple bases are fixedly connected in a ring at equal intervals inside the base. The rotating plate is rotatably connected to the bases. The air inlet includes two vertically concentric annular plates. Multiple air guide plates are fixedly connected between the two annular plates at equal intervals. A dustproof ring mesh extends downward and is fixedly connected to the inner ring wall of the upper annular plate. The lower annular plate is rotatably connected to the bottom of the protective shell. Multiple air guide hoods are provided between the two annular plates at equal intervals. The air guide hoods are located between two adjacent air guide plates. One end of the air guide hood is rotatably connected to the annular plate, and an elastic element is connected between the air guide hood and an air guide plate. The dust removal mechanism includes a dust blowing assembly, which includes a rotating plate in the shape of a circular plate disposed at the bottom of the lower circular plate. An arc-shaped seat with a cavity structure is fixedly connected to the top surface of the rotating plate. The arc-shaped seat is disposed near the outer wall of the dustproof ring net. Air inlets are provided at both ends of the outer arc side of the arc-shaped seat, and an air guide is provided in the middle of the inner arc side of the arc-shaped seat. An air guide pipe is fixedly connected to the bottom of the arc-shaped seat. The air guide pipe is fixedly inserted through the rotating plate and extends downward. The arc-shaped seat blocks the position of the dustproof ring net. When the air inlet rotates, the air inlet intercepts part of the wind force and flows through the air guide pipe via the air guide, blowing away dust from the blocked position of the dustproof ring net. A drive unit is installed on the protective cover. The drive unit is used to drive the air inlet and dust removal mechanism to rotate. The drive unit includes a motor that is fixedly installed through the protective cover. A gear 1 is fixedly connected to the output end of the motor. A gear 2 is meshed on one side of the gear 1. Two gear 3s are provided on both sides of the gear 2. The gear 2 meshes with the adjacent gear 3. The gear 2 and gear 3 are rotatably connected to the bottom of the protective shell. An internal gear ring is fixedly connected to the bottom of the lower annular plate. An external gear ring is fixedly connected to the outer annular wall of the rotating plate. The internal gear ring and the external gear ring mesh with the corresponding gear 3.

2. The flame-retardant power transformer according to claim 1, which improves stability during operation, is characterized in that: An arc-shaped block is fixedly connected to the inner wall of the outer arc side of the arc-shaped seat, and both ends of the arc-shaped block are provided with air guide slopes.

3. The flame-retardant power transformer according to claim 1, which improves stability during operation, is characterized in that: The dust blowing assembly also includes an arc-shaped groove plate disposed near the inner wall of the dustproof ring net. The arc-shaped groove plate is connected and fixed to the rotating plate, and the rotating plate is provided with an air guide groove that communicates with the arc-shaped seat and the arc-shaped groove plate. A partition is horizontally fixed inside the arc-shaped seat.

4. The flame-retardant power transformer according to claim 1, which improves stability during operation, is characterized in that: The protective shell has multiple arc-shaped holes at its bottom and on the outside of the air inlet, and a round hole at its bottom and on the lower side of the rotating plate. The air guide pipe passes through the round hole and extends to the lower side of the protective shell.

5. The flame-retardant power transformer according to claim 1, which improves stability during operation, is characterized in that: The dust removal mechanism also includes a pressurization component, which includes a pressurization pipe fixedly connected to the lower end of the air duct. The pressurization pipe is composed of a rectangular tube and a bucket-shaped tube.

6. The flame-retardant power transformer according to claim 5, which improves stability during operation, is characterized in that: A baffle is rotatably connected to one side of the rectangular tube facing the bucket-shaped tube, and a dust removal component is rotatably connected to the other side of the rectangular tube. The dust removal component includes an arc-shaped intercepting plate and a T-shaped plate fixedly connected to the lower end of the intercepting plate. The intercepting plate has multiple intercepting holes, and one end of the T-shaped plate abuts against the booster pipe.

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