Flame-retardant power transformer capable of improving stability in operation process

Abstract

The invention relates to the technical field of power transformers, and discloses a flame-retardant power transformer capable of improving stability in the operation process, which comprises a protective shell, a transformer main body is mounted in the protective shell, an air cooler is mounted at the bottom of the transformer main body, a protective cover is fixedly connected to the inner bottom of the protective shell, and two air inlet pieces are symmetrically arranged in the protective cover; a dust removal mechanism is arranged on the air inlet piece, and a driving unit is installed on the protective cover and used for driving the air inlet piece and the dust removal mechanism to rotate. Partial position of the dustproof ring net is shielded through the arc-shaped seat, part of airflow enters the arc-shaped seat and the arc-shaped groove when air enters the air inlet piece, and the part of airflow is changed from horizontal movement to vertical movement and is blown to an interception face of the dustproof ring net. Therefore, impurities intercepted on the surface of the dustproof ring net can be downwards blown into the air guide pipe and discharged to the outside, non-contact cleaning is achieved, workpiece loss is avoided, and working noise is lowered.

Description

Technical Field

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

[0002] A power transformer is a static electrical device that converts an AC voltage (current) of a certain value into a voltage (current) of the same frequency but a different value through electromagnetic induction. Dry-type power transformers adopt an oil-free design and use epoxy resin as the insulating medium, making them suitable for places with strict fire protection requirements.

[0003] A dry-type power transformer is primarily composed of an iron core, windings, an insulation system, a cooling device, and a housing. The housing has through-holes at the upper and lower ends for air intake and heat dissipation, respectively. When used outdoors, the transformer is prone to high-temperature conditions. If the housing through-holes are small, air intake and heat dissipation become difficult, preventing the interior of the housing from cooling to an ideal temperature, affecting the transformer's stable operation. If the housing through-holes are large, a protective net must be installed at the through-holes to intercept and protect against external impurities. However, the protective net may become clogged during long-term use and therefore requires regular cleaning or replacement. Prior art patent CN119028701A discloses a dry-type power transformer that uses a dustproof portion to intercept dust and other particles as air enters, and a circulation unit to drive the dustproof portion up and down to vibrate. This reduces the adsorption force of dust on the dustproof portion, and allows the cleaning portion to clean the dust on the dustproof portion. While ensuring the dustproof effect of the dustproof portion, the impact of dust on air ingress can be reduced, facilitating cooling of the transformer.

[0004] However, the existing technology still has the following defects: the surface of the dustproof plate is scraped and cleaned by moving the scraper, but the cleaned dust will still be adsorbed on the side of the air inlet surface of the dustproof plate under the action of suction and cannot fall off. At the same time, there is friction contact between the scraper and the dustproof plate, which not only generates working noise, but also causes workpiece loss, resulting in the need for regular replacement and maintenance. Summary of the Invention

[0005] In view of the problems of noise and workpiece loss when cleaning the dustproof plate in the prior art, a flame-retardant power transformer is proposed which can improve the stability during operation.

[0006] Its purpose is to shield the dustproof ring net through the dust blowing component, use part of the wind force in the intercepting air inlet component to blow air downward on the intercepting surface of the dustproof ring net, remove debris on the dustproof ring net, and achieve contactless and low-noise cleaning.

[0007] The technical solution of the present invention is a flame-retardant power transformer capable of improving stability during operation, comprising a protective shell, a transformer body mounted within the protective shell, an air cooler mounted at the bottom of the transformer body, a protective cover fixedly connected to the bottom of the protective shell, two air inlet members symmetrically disposed within the protective cover, and a dust removal mechanism disposed on the air inlet members; The air inlet member includes two vertically concentrically arranged circular plates, a plurality of air guide plates are fixedly connected in an annular manner with equal spacing between the two circular plates, a dustproof ring net is fixedly connected to the inner ring wall of the upper circular plate extending downward, and the lower circular plate is rotatably connected to the bottom of the protective shell; The dust removal mechanism includes a dust blowing assembly, and the dust blowing assembly includes a rotating plate in the shape of a circular plate arranged at the bottom of the lower circular ring plate, the top surface of the rotating plate is fixedly connected to an arc seat with a cavity structure, the arc seat is arranged close to the outer wall of the dust-proof ring net, both ends of the outer arc side of the arc seat are provided with air inlets, the middle part of the inner arc side of the arc seat is provided with an air guide port, and the bottom of the arc seat is fixedly connected to an air guide pipe, the air guide pipe is fixedly passed through the rotating plate and extends downward, the arc seat blocks the position where the dust-proof ring net is located, and when the air inlet member rotates, the air inlet intercepts part of the wind force, and flows through the air guide port to the air guide pipe, so as to blow and remove dust from the position blocked by the dust-proof ring net; 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.

[0008] By adopting the above technical solution, the driving unit drives the air inlet part and the dust blowing assembly to rotate separately, and the two adjacent air guide plates cooperate with the two circular plates to form an oblique air inlet channel. When the air inlet channel rotates, the peripheral air is gathered to the middle part, and the air flows upward into the air cooler after being filtered by the dustproof ring net. When the arc seat is located on one side of the dustproof ring net, the arc seat blocks the air inlet channel outside the position, so that the dustproof ring net at this position cannot flow air. At the same time, part of the airflow generated by the remaining air inlet channels enters the arc seat through the air inlet, and is caused to flow downward by the action of the air duct. The airflow passes through the air duct during the downward flow. Since the air duct is connected to the dustproof ring net, the downward-moving airflow can blow the surface of the dustproof ring net at this location, so that the debris adhering to the location is discharged through the air duct with the airflow, thereby realizing real-time non-contact cleaning of the dustproof ring net.

[0009] Furthermore, the top of the protective cover is symmetrically provided with two through holes, the dustproof ring net is concentrically arranged with the through holes, the upper annular plate is in rotational contact with the protective cover, and the bottom of the lower annular plate is rotatably connected to a base 1 with an arc-shaped structure, and the base 1 is fixedly connected to the bottom of the protective shell; A plurality of bases 2 are fixedly connected in a circular shape at equal intervals within the base 1, and the rotating plate is rotatably connected to the base 2.

[0010] By adopting the above technical solution, a pair of air inlet parts of the base are rotated to limit the position, and a second pair of dust blowing components of the base are rotated. Under the setting of the protective cover, the outside air enters the air inlet part through the bottom of the protective shell. After passing through the dustproof ring net, the outside air continues to move upward through the through hole at the top of the protective cover.

[0011] Furthermore, a plurality of wind guide covers are provided in a circular shape with equal spacing between the two circular plates. The wind guide covers are provided between two adjacent wind guide plates. One end of the wind guide cover is rotatably connected to the circular plate, and an elastic member is commonly connected between the wind guide cover and a wind guide plate.

[0012] By adopting the above technical solution, when the centrifugal force generated by the rotation of the air inlet part is greater than the pulling force of the elastic part, the air guide cover rotates toward the periphery under the action of the centrifugal force and opens, thereby increasing the air intake volume of the air inlet channel. When the air inlet part is stationary, the elastic part drives the air guide cover to abut against the air guide plate, thereby blocking the air inlet channel and preventing foreign objects from entering.

[0013] Furthermore, 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 wind guide inclined surfaces.

[0014] By adopting the above technical solution, part of the airflow in the air inlet channel enters the cavity of the arc seat from the air inlet, passes through the air guide port and moves into the air guide duct. The airflow can flow quickly to the air guide port through the inclined surface of the arc block. At the same time, the setting of the arc block can reduce the cavity space at the air guide port, so that the gas flow rate at the air guide port can be increased without changing the air flow rate at the air inlet, thereby increasing the blowing ability on the surface of the dustproof ring net.

[0015] Furthermore, the dust blowing assembly further comprises an arc-shaped slot plate arranged near the inner side wall of the dustproof ring net, the arc-shaped slot plate is fixedly connected to the rotating plate, and the rotating plate is provided with an air guide slot communicating with the arc-shaped seat and the arc-shaped slot plate; A partition is horizontally fixedly connected in the arc-shaped seat.

[0016] By adopting the above technical solution, the cavity of the arc seat can be divided into two layers, upper and lower, by a partition. After a part of the airflow enters the upper cavity, it blows the dustproof ring net downward, and the other part of the airflow enters the lower cavity and enters the arc groove plate through the air guide groove. Then the airflow passes through the mesh of the dustproof ring net and moves to the upper cavity, realizing blowing from the inside to the outside of the dustproof ring net, improving the dust removal effect of the dustproof ring net, and effectively preventing debris from adhering to the dustproof ring net.

[0017] Furthermore, the drive unit includes a motor fixedly arranged through the protective cover, the output end of the motor is fixedly connected to gear 1, one side of gear 1 is meshed with gear 2, two mutually meshing gears 3 are provided on both symmetrical sides of gear 2, gear 2 is meshed with the adjacent gear 3, gear 2 and gear 3 are both rotatably connected to the bottom of the protective shell, and the bottom of the circular ring plate on the lower side is fixedly connected to an inner gear ring, and the annular outer side wall of the rotating plate is fixedly connected to an outer gear ring, and the inner gear ring and outer gear ring are respectively meshed with the corresponding gear 3.

[0018] By adopting the above technical solution, when the motor rotates, the inner gear ring and the outer gear ring are driven to rotate in the same direction through the cooperation between gear one and gear two, and gear two and gear three. The dust blowing component follows the air inlet part to rotate in the same direction and at different speeds, which can increase the contact time between the dust blowing component and the same part of the dustproof ring net, so that the same position of the dustproof ring net can be blown for a long time, ensuring that the debris on the surface of the dustproof ring net can be blown away.

[0019] Furthermore, a plurality of arc-shaped holes are provided at the bottom of the protective shell and located outside the air inlet member, a circular hole is provided at the bottom of the protective shell and located under the rotating plate, and the air guide pipe passes through the circular hole and extends to the lower side of the protective shell.

[0020] Using the above technical solution, multiple arc-shaped holes are arranged in a circular shape with equal intervals on the outer periphery of the air inlet piece, so that the outside air can enter the protective cover through the arc-shaped holes and be extracted by the air inlet piece through rotation. The debris removed by the dust blowing component is discharged to the outside again through the air duct.

[0021] Furthermore, the dust removal mechanism also includes a boosting component, which includes a boosting pipe fixedly connected to the lower end of the air guide pipe, and the boosting pipe is composed of a rectangular pipe body and a bucket-shaped pipe body.

[0022] Using the above technical solution, the air duct is connected to the rectangular tube body, and the bucket-shaped tube body and the dust-blowing assembly are arranged in the same direction of rotation. When the dust-blowing assembly rotates, the bucket-shaped tube body introduces external air into the rectangular tube body. Since the internal space of the bucket-shaped tube body is larger than the internal space of the rectangular tube body, the flow rate of the air increases when it moves in the rectangular tube body, thereby increasing the exhaust speed of the air duct, and further improving the dust collection effect at the air duct outlet.

[0023] Furthermore, a baffle is rotatably connected to one side of the rectangular tube body facing the bucket-shaped tube body, and a dust exhaust piece is rotatably connected to the other side of the rectangular tube body. The dust exhaust piece includes an intercepting plate with an arc-shaped structure, and a T-shaped plate fixedly connected to the lower end of the intercepting plate. A plurality of intercepting holes are provided on the intercepting plate, and one end of the T-shaped plate abuts against the boost pipe.

[0024] By adopting the above technical solution, when the boost assembly rotates, the baffle and the T-shaped plate are automatically rotated by the wind to open the boost pipe port. At this time, the right end of the T-shaped plate contacts the bottom of the boost pipe, and the interception plate blocks the exhaust port of the boost pipe, which can prevent the debris discharged from the air guide pipe from being directly discharged and then re-entering the air inlet part. When the boost assembly is stationary, the baffle is vertically arranged under the action of gravity, and the interception plate rotates clockwise under the action of gravity to make the left end of the T-shaped plate abut against the boost pipe, thereby shielding and protecting the two ports of the boost pipe to prevent foreign matter from entering the boost pipe. At the same time, debris on the surface of the interception plate can fall downward.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. Part of the dustproof ring net is shielded by the arc seat. The blocked part of the dustproof ring net does not intercept impurities. When the air inlet is taking in air, part of the airflow enters the arc seat and the arc groove. By changing the horizontal movement of this part of the airflow to vertical movement and blowing it toward the interception surface of the dustproof ring net, the impurities intercepted on the surface of the dustproof ring net can be blown downward into the air duct and discharged to the outside, thereby realizing contactless cleaning, avoiding workpiece loss, and reducing working noise.

[0026] 2. When the boost pipe rotates with the dust blowing component, the outside air is drawn in and compressed through the boost pipe, so that the air flows faster in the boost pipe, which can produce a suction effect on the air guide pipe, thereby further increasing the cleaning effect of the dustproof ring net at the air guide port.

[0027] 3. When the interception plate is set vertically, it can intercept the discharged impurities to prevent them from being directly discharged to the outside and then being sucked in again by the air inlet part. When the air inlet part stops rotating, the outer arc surface of the interception plate is set downward when it rotates, and the intercepted impurities can be automatically discharged downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 Schematic diagram of the cross-section of the protective shell and protective cover structure of the present invention; Figure 3 This is a schematic diagram of the structure of the air inlet member of the present invention; Figure 4 This is a schematic diagram of the structure of the dustproof ring net, arc seat, and arc slot plate of the present invention; Figure 5 This is a schematic diagram of the air guide cover structure of the present invention in an expanded state; Figure 6 This is a schematic structural diagram of the dust blowing assembly of the present invention; Figure 7 This is a schematic diagram of the disassembly of the arc-shaped seat and arc-shaped operating structure of the present invention; Figure 8Schematic diagram of the drive unit structure of the present invention; Figure 9 This is a schematic diagram of the structure of the booster assembly of the present invention; Figure 10 This is a schematic diagram of the working state of the baffle and intercepting plate structure of the present invention.

[0029] In the picture: 1. Protective shell; 2. Transformer body; 3. Air cooler; 4. Drive unit; 41. Motor; 42. Gear 1; 43. Gear 2; 44. Gear 3; 45. Inner gear ring; 46. Outer gear ring; 5. Protective cover; 6. Air inlet piece; 61. Circular plate; 62. Air guide plate; 63. Dustproof ring net; 64. Air guide cover; 7. Dust blowing assembly; 71. Rotating plate; 72. Arc seat; 73. Air guide duct; 74. Arc block; 75. Partition; 76. Arc trough plate; 8. Boost assembly; 81. Boost pipe; 82. Baffle; 83. Interceptor plate; 84. T-shaped plate; 9. Base 1; 10. Base 2. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1, reference Figures 1-6 , which is the first embodiment of the present invention, provides a flame-retardant power transformer that can improve stability during operation, including a protective shell 1, a transformer body 2 is installed in the protective shell 1, a cooler 3 is installed at the bottom of the transformer body 2, a protective cover 5 is fixedly connected to the bottom of the protective shell 1, two air inlet members 6 are symmetrically arranged in the protective cover 5, and a dust removal mechanism is provided on the air inlet member 6; the air inlet member 6 includes two vertically concentric circular plates 61, a plurality of air guide plates 62 are fixedly connected in an annular manner with equal intervals between the two circular plates 61, a dustproof ring net 63 is fixedly connected to the inner ring wall of the upper circular plate 61 downwardly extending, and the lower circular plate 61 is rotatably connected to the shell bottom of the protective shell 1; the dust removal mechanism includes a dust blowing component 7, and the dust blowing component 7 includes a dust blowing component 7 provided on the lower side. The bottom of the circular ring plate 61 is a circular plate-shaped rotating plate 71, and the top surface of the rotating plate 71 is fixedly connected to an arc seat 72 with a cavity structure. The arc seat 72 is arranged close to the outer wall of the dustproof ring net 63. Both ends of the outer arc side of the arc seat 72 are provided with air inlets, and the middle part of the inner arc side of the arc seat 72 is provided with an air guide port, and the bottom of the arc seat 72 is fixedly connected to an air guide pipe 73, which is fixedly passed through the rotating plate 71 and extends downward. The arc seat 72 blocks the position where the dustproof ring net 63 is located. When the air inlet part 6 rotates, the air inlet intercepts part of the wind and flows through the air guide port to the air guide pipe 73, blowing and dusting the blocked position of the dustproof ring net 63; a drive unit 4 is installed on the protective cover 5, and the drive unit 4 is used to drive the air inlet part 6 and the dust removal mechanism to rotate.

[0032] Specifically, the driving unit 4 drives the air inlet part 6 and the dust blowing assembly 7 to rotate separately, and the two adjacent air guide plates 62 cooperate with the two circular ring plates 61 to form an oblique air inlet channel. When the air inlet channel rotates, the peripheral air is gathered to the middle, and the air is filtered by the dust-proof ring net 63 and flows upward to the air cooler 3. When the arc seat 72 is located on one side of the dust-proof ring net 63, the arc seat 72 blocks the air inlet channel outside the position, so that the dust-proof ring net 63 at this position cannot flow air. At the same time, part of the airflow generated by the remaining air inlet channels enters the arc seat 72 through the air inlet, and under the action of the air guide duct 73, this part of the airflow flows downward. The airflow passes through the air guide port during the downward flow. Since the air guide port is connected to the dust-proof ring net 63, the downward-moving airflow can blow the surface of the dust-proof ring net 63 at this location, so that the debris adhering to the location is discharged through the air guide duct 73 with the airflow, thereby realizing real-time non-contact cleaning of the dust-proof ring net 63.

[0033] Among them, reference Figure 1 The protective shell 1 includes a shell, legs, and a top cover. A protective door (not shown) is hinged on one side of the shell. The top cover is detachably connected to the upper end of the shell, and air outlet holes are symmetrically opened on both sides of the top cover. When the top cover is not connected to the shell, the transformer body 2 is hoisted from the upper end of the shell into the shell and is fixed to the top of the protective cover 5 through a support.

[0034] Reference Figure 2 、 Figure 3 and Figure 8 Two through holes are symmetrically opened on the top of the protective cover 5, the dustproof ring net 63 is concentrically arranged with the through holes, the upper circular plate 61 is in rotational contact with the protective cover 5, and the bottom of the lower circular plate 61 is rotatably connected to a base 9 with an arc-shaped structure, and the base 9 is fixedly connected to the bottom of the protective shell 1; a plurality of bases 2 10 are fixedly connected in a circular shape with equal intervals inside the base 10, and the rotating plate 71 is rotatably connected to the base 2 10.

[0035] Specifically, the base 1 9 limits the rotation of the air inlet member 6, and the base 2 10 rotates the dust blowing assembly 7. Under the setting of the protective cover 5, the outside air enters the air inlet member 6 through the bottom of the protective shell 1, and the outside air passes through the dustproof ring net 63 and then continues to move upward through the through hole at the top of the protective cover 5.

[0036] It can be understood that the top surfaces of base 1 9 and base 2 10 are both circular and rotatably connected with multiple rollers at equal intervals, so that the air inlet part 6 and the dust blowing component 7 can rotate more smoothly and reduce working noise.

[0037] Reference Figure 4-Figure 5A plurality of wind guide covers 64 are provided in a circular shape with equal intervals between the two circular ring plates 61. The wind guide cover 64 is provided between two adjacent wind guide plates 62. One end of the wind guide cover 64 is rotatably connected to the circular ring plate 61, and an elastic member is commonly connected between the wind guide cover 64 and one wind guide plate 62.

[0038] Specifically, when the centrifugal force generated when the air inlet member 6 rotates is greater than the pulling force of the elastic member, the air guide cover 64 rotates toward the periphery under the action of the centrifugal force and opens, thereby increasing the amount of air entering the air inlet channel. When the air inlet member 6 is stationary, the elastic member drives the air guide cover 64 to abut against the air guide plate 62, thereby blocking the air inlet channel and preventing foreign matter from entering.

[0039] Among them, the air guide cover 64 includes an L-shaped plate, one end of the L-shaped plate is rotatably connected to the two circular plates 61, and the side of the L-shaped plate facing the circular plate 61 is fixedly connected to a rib plate. The L-shaped plate and the rib plate cooperate to form a bucket-shaped structure, which can help increase the air intake. The elastic part can be any element that can automatically reset after stretching. In this technical solution, a tension spring is preferably used.

[0040] Reference Figure 6 An arc block 74 is fixedly connected to the inner wall of the outer arc side of the arc seat 72, and both ends of the arc block 74 are provided with wind guide inclined surfaces.

[0041] Specifically, part of the air flow in the air inlet channel enters the cavity of the arc seat 72 from the air inlet, passes through the air guide port and moves into the air guide duct 73. The air flow can flow quickly to the air guide port through the inclined surface of the arc block 74. At the same time, the setting of the arc block 74 can reduce the cavity space at the air guide port, so that the gas flow rate at the air guide port can be increased without changing the air flow rate at the air inlet, thereby increasing the blowing ability on the surface of the dustproof ring net 63.

[0042] Reference Figure 8 The drive unit 4 includes a motor 41 fixedly arranged through the protective cover 5, and the output end of the motor 41 is fixedly connected to a gear 1 42, and one side of the gear 1 42 is meshed with a gear 2 43, and two mutually meshing gears 3 44 are provided on both symmetrical sides of the gear 2 43. The gear 2 43 meshes with the adjacent gear 3 44, and the gear 2 43 and the gear 3 44 are both rotatably connected to the bottom of the protective shell 1, and the bottom of the lower circular ring plate 61 is fixedly connected to an inner gear ring 45, and the outer gear ring 46 is fixedly connected to the annular outer wall of the rotating plate 71, and the inner gear ring 45 and the outer gear ring 46 are respectively meshed with the corresponding gear 3 44.

[0043] Specifically, when the motor 41 rotates, the gear 1 42 and the gear 2 43, and the gear 2 43 and the gear 3 44 cooperate to drive the inner gear ring 45 and the outer gear ring 46 to rotate in the same direction. The dust blowing component 7 follows the air inlet part 6 to rotate in the same direction and at different speeds, which can increase the contact time between the dust blowing component 7 and the same part of the dustproof ring net 63, so that the same position of the dustproof ring net 63 can be blown for a long time, ensuring that the debris on the surface of the dustproof ring net 63 can be blown away.

[0044] It is understandable that the motor 41 and the air cooler 3 work synchronously, 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 external air into the protective shell 1.

[0045] Reference Figure 2 and Figure 8 A plurality of arc-shaped holes are opened at the bottom of the protective shell 1 and located on the outside of the air inlet member 6. A circular hole is opened at the bottom of the protective shell 1 and located on the lower side of the rotating plate 71. The air guide duct 73 passes through the circular hole and extends to the lower side of the protective shell 1.

[0046] Specifically, a plurality of arc-shaped holes are arranged in a circular shape at equal intervals on the periphery of the air inlet member 6, so that outside air can enter the protective cover 5 through the arc-shaped holes and be extracted by the air inlet member 6 through rotation. The debris removed by the dust blowing assembly 7 is discharged to the outside again through the air duct 73.

[0047] Example 2, reference Figure 4 、 Figure 6 and Figure 7 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the dust blowing assembly 7 also includes an arc-shaped groove plate 76 arranged 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 connected to the arc-shaped seat 72 and the arc-shaped groove plate 76; a partition plate 75 is horizontally fixedly connected to the arc-shaped seat 72.

[0048] Specifically, the cavity of the arc seat 72 can be divided into two layers, the upper and lower layers, by the partition 75. After a part of the airflow enters the upper cavity, the dustproof ring net 63 is blown downward, and the other part of the airflow enters the lower cavity and enters the arc 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 blowing from the inside to the outside of the dustproof ring net 63, thereby 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 that of Example 1.

[0049] Example 3, reference Figure 9-10, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that the dust removal mechanism also includes a boosting component 8, the boosting component 8 includes a boosting pipe 81 fixedly connected to the lower end of the air guide pipe 73, and the boosting pipe 81 is composed of a rectangular tube body and a bucket-shaped tube body.

[0050] Specifically, the air duct 73 is connected to the rectangular tube body, and the bucket-shaped tube body is arranged in the same direction of rotation as the dust-blowing assembly 7. When the dust-blowing assembly 7 rotates, the bucket-shaped tube body introduces external air into the rectangular tube body. Since the internal space of the bucket-shaped tube body is larger than the internal space of the rectangular tube body, the flow rate of the air increases when it moves in the rectangular tube body, thereby increasing the exhaust speed of the air duct 73, and further improving the dust collection effect at the air duct port.

[0051] Reference Figure 9-10 A baffle 82 is rotatably connected to one side of the rectangular tube body facing the bucket-shaped tube body, and a dust exhaust component is rotatably connected to the other side of the rectangular tube body. The dust exhaust component includes an intercepting plate 83 with an arc-shaped structure, and a T-shaped plate 84 fixedly connected to the lower end of the intercepting plate 83. A plurality of intercepting holes are provided on the intercepting plate 83, and one end of the T-shaped plate 84 is in contact with the boost pipe 81.

[0052] Specifically, when the boost assembly 8 rotates, the baffle 82 and the T-shaped plate 84 are automatically rotated by the wind to open the port of the boost pipe 81. At this time, the right end of the T-shaped plate 84 contacts the bottom of the boost pipe 81, and the interception plate 83 blocks the exhaust port of the boost pipe 81, which can prevent the debris discharged from the air guide 73 from being directly discharged and then re-entering the air inlet part 6. When the boost assembly 8 is stationary, the baffle 82 is vertically arranged under the action of gravity, and the interception plate 83 rotates clockwise under the action of gravity to make the left end of the T-shaped plate 84 abut against the boost pipe 81, thereby shielding and protecting the two ports of the boost pipe 81 to prevent foreign matter from entering the boost pipe 81. At the same time, debris on the surface of the interception plate 83 can fall downward.

[0053] It can be understood that when the boost pipe 81 rotates, the gas flow rate in the rectangular tube is greater than the external air flow rate, so the airflow thrust is greater than the gravity of the T-shaped plate 84 and the intercepting plate 83, causing the T-shaped plate 84 and the intercepting plate 83 to rotate.

[0054] In addition, the interception plate 83 is arranged in an arc shape. On the one hand, when the exhaust port of the boost pipe 81 is blocked, the contact area between the airflow and the interception plate 83 can be increased, so that the gas can be discharged to the outside quickly. On the other hand, when the interception plate 83 is arranged with the arc surface downward, impurities can be prevented from adhering to the surface of the interception plate 83, and the outside air can carry away the impurities on the surface of the interception plate 83 when flowing. The rest of the structure is the same as that of Example 2.

[0055] Comprehensive embodiment 1-3, the working principle of the present invention is: the motor 41 rotates to drive the two air inlet parts 6 to rotate in opposite directions, so that the air guide cover 64 cooperates with the air inlet channel to extract the outside air through the dustproof ring net 63 and then enter the protective shell 1, the air cooler 3 extracts the filtered air to blow and cool the transformer body 2, the outer arc side of the arc seat 72 blocks one of the air inlet channels, the air inlet of the arc seat 72 intercepts part of the air flow into the cavity, and part of the air flow enters the upper cavity and then blows the dustproof ring net 63 to the inside. The air is blown out from the bottom, and the other part of the airflow enters the lower cavity and then enters the arc-shaped groove plate 76 through the air guide groove. Then the airflow passes through the mesh of the dust-proof ring net 63 and moves to the upper cavity, so that the impurities on the interception surface of the dust-proof ring net 63 are blown out. When the boost pipe 81 rotates synchronously with the dust-blowing component 7, the outside air enters the bucket-shaped tube body and is compressed into the rectangular tube body, which increases the air flow rate in the rectangular tube body, improves the exhaust speed of the air guide pipe 73, and improves the dust collection effect at the air guide port.

[0056] 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flame-retardant power transformer capable of improving stability during operation, comprising a protective shell, a transformer body mounted within the protective shell, and a cooling fan mounted 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 inlet pieces are symmetrically arranged in the protective cover, and a dust removal mechanism is provided on the air inlet pieces; The air inlet member includes two vertically concentrically arranged circular plates, a plurality of air guide plates are fixedly connected in an annular manner with equal spacing between the two circular plates, a dustproof ring net is fixedly connected to the inner ring wall of the upper circular plate extending downward, and the lower circular plate is rotatably connected to the bottom of the protective shell; The dust removal mechanism includes a dust blowing assembly, and the dust blowing assembly includes a rotating plate in the shape of a circular plate arranged at the bottom of the lower circular ring plate, the top surface of the rotating plate is fixedly connected to an arc seat with a cavity structure, the arc seat is arranged close to the outer wall of the dust-proof ring net, both ends of the outer arc side of the arc seat are provided with air inlets, the middle part of the inner arc side of the arc seat is provided with an air guide port, and the bottom of the arc seat is fixedly connected to an air guide pipe, the air guide pipe is fixedly passed through the rotating plate and extends downward, the arc seat blocks the position where the dust-proof ring net is located, and when the air inlet member rotates, the air inlet intercepts part of the wind force, and flows through the air guide port to the air guide pipe, so as to blow and remove dust from the position blocked by the dust-proof ring net; 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.

2. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: The top of the protective cover is symmetrically provided with two through holes, the dustproof ring net is concentrically arranged with the through holes, the upper annular plate is in rotational contact with the protective cover, and the bottom of the lower annular plate is rotatably connected to a base 1 with an arc-shaped structure, and the base 1 is fixedly connected to the bottom of the protective shell; A plurality of bases 2 are fixedly connected in a circular shape at equal intervals within the base 1, and the rotating plate is rotatably connected to the base 2.

3. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: A plurality of wind guide covers are arranged in a circular shape with equal intervals between the two circular plates. The wind guide covers are arranged between two adjacent wind guide plates. One end of the wind guide cover is rotatably connected to the circular plate, and an elastic member is commonly connected between the wind guide cover and one wind guide plate.

4. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: An arc block is fixedly connected to the inner wall of the outer arc side of the arc seat, and both ends of the arc block are provided with wind guide inclined surfaces.

5. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: The dust blowing assembly also includes an arc-shaped slot plate arranged near the inner side wall of the dustproof ring net, the arc-shaped slot plate is fixedly connected to the rotating plate, and the rotating plate is provided with an air guide slot connected to the arc-shaped seat and the arc-shaped slot plate; A partition is horizontally fixedly connected in the arc-shaped seat.

6. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: The drive unit includes a motor fixedly arranged through the protective cover, the output end of the motor is fixedly connected to gear 1, one side of the gear 1 is meshed with gear 2, two mutually meshing gears 3 are provided on both symmetrical sides of the gear 2, the gear 2 is meshed with the adjacent gear 3, the gear 2 and the gear 3 are both rotatably connected to the bottom of the protective shell, and the bottom of the circular ring plate on the lower side is fixedly connected to an inner gear ring, and the annular outer side wall of the rotating plate is fixedly connected to an outer gear ring, and the inner gear ring and the outer gear ring are respectively meshed with the corresponding gear 3.

7. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: A plurality of arc-shaped holes are provided at the bottom of the protective shell and outside the air inlet member, a circular hole is provided at the bottom of the protective shell and below the rotating plate, and the air guide pipe passes through the circular hole and extends to the lower side of the protective shell.

8. The flame-retardant power transformer capable of improving stability during operation according to claim 1, characterized in that: The dust removal mechanism also includes a boosting component, which includes a boosting pipe fixedly connected to the lower end of the air guide pipe, and the boosting pipe is composed of a rectangular pipe body and a bucket-shaped pipe body.

9. The flame-retardant power transformer capable of improving stability during operation according to claim 8, characterized in that: A baffle is rotatably connected to one side of the rectangular tube body facing the bucket-shaped tube body, and a dust exhaust piece is rotatably connected to the other side of the rectangular tube body. The dust exhaust piece includes an intercepting plate with an arc-shaped structure, and a T-shaped plate fixedly connected to the lower end of the intercepting plate. A plurality of intercepting holes are provided on the intercepting plate, and one end of the T-shaped plate abuts against the boost pipe.

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