An environmentally friendly dry-type transformer

Abstract

The present invention relates to the technical field of transformers, and specifically to an environmentally friendly dry-type transformer, comprising a housing, a transformer body and a dustproof device; the transformer body is fixedly installed in the housing; an air inlet and an air outlet are provided on the housing; the dustproof device comprises a filter cartridge arranged at the air inlet, and the filter cartridge is arranged as a conical cylindrical structure formed by spirally winding a strip-shaped filter plate, with the large end facing outward and the small end facing inward, so as to facilitate the entry of external gas into the housing and increase the air intake area. The structure formed by winding the strip-shaped filter plate has a certain elasticity, and the small end thereof can be driven to rotate by a driving member to stretch it and shrink it in the circumferential direction, so as to squeeze and break the agglomerated dust inside it, and then the dust inside it can be ejected by its own action of restoring its deformation and shrinking, so as to realize the cleaning of the filter cartridge without manual cleaning, and the vibration during the deformation restoration can further promote the dust attached to its inner wall to fall off, thereby improving the cleaning effect of the filter cartridge.

Description

Technical Field

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

[0002] A dry-type transformer is a transformer that does not use oil as an insulating and cooling medium. Unlike oil-immersed transformers, dry-type transformers use air as a cooling medium, and their insulating materials are usually solid insulation (such as epoxy resin or paper materials), so they are called "dry type". Because of its safety, environmental protection, and low maintenance characteristics, it is widely used in places that require high safety, environmental protection, and stable operation. When in use, it is usually centrally placed in a box-type housing to prevent water, dust, and rodents. At the same time, it needs to be ventilated and heat-dissipated to prevent its internal temperature from being high or humid. In order to prevent dust or debris in the air from entering the interior of the box, a filter is usually set at the air inlet, but as the use time increases, the filter is easy to be blocked. If it is not cleaned in time, it will affect the ventilation effect of the transformer, and then affect its normal operation. Summary of the invention

[0003] The invention provides an environmentally friendly dry-type transformer to solve the problem that a filter screen at a ventilation opening of an existing transformer box is easily clogged.

[0004] An environmentally friendly dry-type transformer of the present invention adopts the following technical solution:

[0005] An environmentally friendly dry-type transformer comprises a shell, a transformer body and a dustproof device; the transformer body is fixedly installed in the shell; an air inlet and an air outlet are provided on the shell; the dustproof device comprises a filter cartridge, a driving member, a fixing ring and a fixing plate; the fixing ring is fixed to the air inlet of the shell, and the inner ring of the fixing ring is connected with the inside and outside of the shell; the filter cartridge is located in the shell and is a conical cylindrical structure formed by spirally winding a belt-shaped filter plate, the conical cylindrical structure is coaxial with the fixing ring, and two adjacent circles of filter plates are slidably connected along the extension direction of the filter plates; a circle of filter plates located at the large end of the filter cartridge is provided on the circumference There are multiple first sliders, each of which is radially slidably installed on the fixing ring; and a circle of filter plates located at the large end of the filter cartridge is connected to the fixing ring through a retractable corrugated plate; the driving member is a motor, the output shaft of the motor is coaxial with the fixing ring, and can rotate under the drive of the motor and can idle when the motor is stopped; the fixing plate slides axially along the output shaft of the motor and can rotate driven by the output shaft of the motor; a plurality of second sliders are arranged on the circumference of a circle of filter plates located at the small end of the filter cartridge, and each second slider is radially slidably installed on the fixing plate along the fixing ring.

[0006] Optionally, a filter plate located on one side of the inner ring of the conical cylindrical structure is provided with a slide groove arranged along the extension direction of the filter plate, and a filter plate located on one side of the outer ring of the conical cylindrical structure is provided with spaced balls, and the balls of two adjacent filter plates are slidably matched with the slide groove.

[0007] Optionally, the inner ring of the fixed ring is provided with a plurality of first guide rails extending radially thereof, and each first slider is slidably mounted on a corresponding first guide rail; the fixed plate is provided with a plurality of second guide rails extending radially along the fixed ring, each second guide rail corresponds to a first guide rail, and each second slider is slidably mounted on a second guide rail.

[0008] Optionally, the output shaft of the motor is a polygonal column, and a polygonal hole having the same cross-section as the polygonal column is opened on the fixing plate, and the fixing plate is slidably matched with the output shaft of the motor through the polygonal hole.

[0009] Optionally, an extension rod is provided in the housing, and the driving member is fixed to the extension rod.

[0010] Optionally, the air inlet and the air outlet are both opened on the side wall of the shell, and the axis of the conical cylindrical structure of the filter cartridge is arranged horizontally.

[0011] Optionally, a filter is installed at the air outlet.

[0012] Optionally, an openable and closable inspection door is mounted on one of the side walls of the housing.

[0013] Optionally, a top cover is installed on the top of the shell, the center of the top cover is high and the edge is low, and the edge of the top cover exceeds the side wall of the shell.

[0014] Optionally, the inner side wall of the shell is provided with reinforcing ribs.

[0015] The beneficial effects of the present invention are as follows: the filter cartridge of the environmentally friendly dry-type transformer of the present invention is set as a conical cylindrical structure formed by spirally winding a strip-shaped filter plate, with the large end facing outward and the small end facing inward, which facilitates the entry of external gas into the shell and increases the air intake area. The structure formed by winding the strip-shaped filter plate has a certain elasticity, and the small end thereof can be driven to rotate by a driving member to stretch it and shrink it in the circumferential direction, thereby squeezing and crushing the agglomerated dust inside it, and then the dust inside it is ejected by its own action of recovering its deformation and shrinking, thereby realizing the cleaning of the filter cartridge without manual cleaning, and the vibration during the recovery of the deformation can further promote the dust attached to the inner wall to fall off, thereby improving the cleaning effect of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0017] Figure 1It is a schematic diagram of the overall structure of an environmentally friendly dry-type transformer of the present invention;

[0018] Figure 2 It is a schematic diagram of partial structural disassembly of an environmentally friendly dry-type transformer of the present invention;

[0019] Figure 3 for Figure 2 The enlarged schematic diagram of point D in the middle;

[0020] Figure 4 A side view of the overall structure of an environmentally friendly dry-type transformer of the present invention;

[0021] Figure 5 for Figure 4 Schematic diagram of the section along the AA direction;

[0022] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0023] Figure 7 for Figure 5 The enlarged schematic diagram of the center C;

[0024] Figure 8 It is a schematic cross-sectional view of an environmentally friendly dry-type transformer of the present invention.

[0025] In the figure: 100, shell; 110, extension rod; 120, top cover; 130, reinforcing ribs; 140, filter; 150, inspection door; 200, transformer body; 300, dustproof device; 310, filter cartridge; 311, first slider; 312, second slider; 313, ball; 320, driving member; 330, fixing ring; 331, first guide rail; 340, fixing plate; 341, second guide rail; 350, corrugated plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0027] An embodiment of an environmentally friendly dry-type transformer of the present invention is as follows Figures 1 to 8 As shown, it includes a housing 100 , a transformer body 200 and a dustproof device 300 .

[0028] The transformer body 200 is fixedly installed in the housing 100 .

[0029] The housing 100 is provided with an air inlet and an air outlet, wherein the air inlet and the air outlet are both provided on the side wall of the housing 100, and a filter 140 is installed at the air outlet. Preferably, an exhaust fan can be provided at the air outlet to accelerate the discharge of gas in the housing 100 and improve the heat exchange efficiency inside and outside the housing 100.

[0030] The dustproof device 300 includes a filter cartridge 310, a driving member 320, a fixing ring 330 and a fixing plate 340; the fixing ring 330 is fixed to the air inlet of the housing 100, and the inner ring of the fixing ring 330 communicates with the inside and outside of the housing 100. The filter cartridge 310 is located in the housing 100, and is a conical cylindrical structure formed by spirally winding a belt-shaped filter plate. The conical cylindrical structure is elastic, and the axis is horizontal and coaxial with the fixing ring 330. Two adjacent circles of filter plates are slidably connected along the extension direction of the filter plates to prevent the two adjacent circles of filter plates from being separated; a plurality of first sliders 311 are arranged on the circumference of a circle of filter plates located at the large end of the filter cartridge 310, and each first slider 311 is radially slidably installed on the fixing ring 330 along the fixing ring 330; and a circle of filter plates located at the large end of the filter cartridge 310 is connected to the fixing ring 330 through a retractable corrugated plate 350 to prevent unfiltered air from entering the housing 100 from between the filter cartridge 310 and the fixing ring 330. The driving member 320 is a motor, the output shaft of the motor is coaxial with the fixing ring 330, and can rotate under the drive of the motor and can idle when the motor is stopped; the fixing plate 340 slides axially along the output shaft of the motor and can rotate driven by the output shaft of the motor; a plurality of second sliders 312 are arranged on the circumference of a circle of filter plates located at the small end of the filter cartridge 310, and each second slider 312 is radially slidably installed on the fixing plate 340 along the fixing ring 330.

[0031] After being filtered by the filter cartridge 310, the outside air enters the housing 100 to cool or ventilate the transformer body 200. As the use time increases, dust accumulates and clumps inside the filter cartridge 310. When the driving member 320 is started, the output shaft of the motor drives the fixing ring 330 to rotate, and the rotation direction is consistent with the direction in which the filter plate of the filter cartridge 310 is wound from the large end to the small end of the conical cylindrical structure. The fixing ring 330 drives the small end of the conical cylindrical structure to rotate, and the filter plate constituting the filter cartridge 310 is further rotated, so that the fixing plate 340 moves away from the fixing ring 330. The conical cylindrical structure is elongated in its axial direction, and the circumferential dimensions of its large end and small end are reduced, that is, the plurality of first sliders 311 and the plurality of second sliders 312 are respectively gathered toward the center of the conical cylindrical structure. In this process, the size of the filter cartridge 310 in the circumferential direction is reduced, and the clumps of dust attached to its inner wall are broken. After the motor stops rotating, the filter cartridge 310 has a tendency to restore its own deformation, and the fixed plate 340 drives the small end of the filter cartridge 310 to rotate in the opposite direction and move toward the fixed ring 330. Since there is no external force obstruction, the filter cartridge 310 will quickly restore its initial state under the action of its own elasticity, and while shrinking in the axial direction, the broken dust fragments on its inner wall will be ejected to achieve the cleaning of the inner wall of the filter cartridge 310. In this process, the deformation of the filter cartridge 310 will produce vibrations, further causing the dust on its inner wall to fall off. In some other embodiments, the small end of the filter cartridge 310 can also be reversed by the motor to reverse, thereby restoring the filter cartridge 310 to its initial state, and the speed at which the motor drives the fixed plate 340 to rotate forward to lengthen the filter cartridge 310 is less than the speed at which the motor drives the fixed plate 340 to reverse to restore the filter cartridge 310 to its deformation.

[0032] The filter cartridge 310 is configured as a conical cylindrical structure formed by spirally winding a strip-shaped filter plate, with the large end facing outward and the small end facing inward, so as to facilitate the entry of external gas into the housing 100 and increase the air intake area. The structure formed by winding the strip-shaped filter plate has a certain elasticity, and the small end thereof can be driven to rotate by the driving member 320 to stretch it and shrink it in the circumferential direction, so as to squeeze and break the agglomerated dust inside it, and then the dust inside it can be ejected by its own action of recovering its deformation and shrinking, so as to realize the cleaning of the filter cartridge 310 without manual cleaning, and the vibration during the recovery of the deformation can further cause the dust attached to its inner wall to fall off, thereby improving the cleaning effect of the filter cartridge 310.

[0033] In this embodiment, a slide groove is provided along the extension direction of the filter plate on one side of the inner ring of the conical cylindrical structure, and balls 313 are provided at intervals on one side of the outer ring of the conical cylindrical structure. In two adjacent circles of filter plates, the filter plate near the fixing ring 330 is located outside the filter plate near the fixing plate 340, and the balls 313 on the inner filter plate are slidably matched with the slide groove on the outer filter plate. The cooperation between the balls 313 and the slide groove prevents the adjacent two circles of filter plates from being separated in the axial direction of the filter cylinder 310.

[0034] In this embodiment, the inner ring of the fixing ring 330 is provided with a plurality of first guide rails 331 extending in the radial direction thereof, and each first slider 311 is slidably mounted on a corresponding first guide rail 331; the fixing plate 340 is provided with a plurality of second guide rails 341 extending in the radial direction of the fixing ring 330, and each second guide rail 341 corresponds to a first guide rail 331, and each second slider 312 is slidably mounted on a second guide rail 341. There are four first sliders 311 and four second sliders 312, and there are four corresponding first guide rails 331 and four corresponding second guide rails 341.

[0035] In this embodiment, the output shaft of the motor is a polygonal column, and a polygonal hole having the same cross section as the polygonal column is opened on the fixing plate 340. The fixing plate 340 slidably cooperates with the output shaft of the motor through the polygonal hole.

[0036] In this embodiment, an extension rod 110 is disposed in the housing 100 , and the driving member 320 is fixed to the extension rod 110 .

[0037] In this embodiment, an openable and closable inspection door 150 is installed on one of the side walls of the housing 100. A reinforcing rib 130 is provided on the inner side wall of the housing 100. A top cover 120 is installed on the top of the housing 100, and the top cover 120 has a high center and a low edge, and the edge of the top cover 120 exceeds the side wall of the housing 100.

[0038] When an environmentally friendly dry-type transformer of the present invention is in use, the outside air is filtered by the filter cartridge 310 and then enters the housing 100 to cool or ventilate the transformer body 200. As the use time increases, dust accumulates and clumps inside the filter cartridge 310. When the driving member 320 is started, the output shaft of the motor drives the fixing ring 330 to rotate, and the rotation direction is consistent with the direction in which the filter plate of the filter cartridge 310 is wound from the large end to the small end of the conical cylindrical structure. The fixing ring 330 drives the small end of the conical cylindrical structure to rotate, and the filter plate constituting the filter cartridge 310 is further rotated, so that the fixing plate 340 moves away from the fixing ring 330. The conical cylindrical structure is elongated in its axial direction, and the circumferential dimensions of the large end and the small end are reduced, that is, the plurality of first sliders 311 and the plurality of second sliders 312 are respectively gathered toward the center of the conical cylindrical structure. In this process, the size of the filter cartridge 310 in the circumferential direction is reduced, and the agglomerated dust attached to its inner wall is broken. After the motor stops rotating, the filter cartridge 310 tends to restore its own deformation, and the fixing plate 340 drives the small end of the filter cartridge 310 to rotate in the opposite direction and move toward the fixing ring 330. Since there is no external force obstruction, the filter cartridge 310 will quickly restore its initial state under the action of its own elasticity, and while shrinking in the axial direction, the broken dust fragments on its inner wall will be ejected, thereby cleaning the inner wall of the filter cartridge 310. In this process, the deformation of the filter cartridge 310 will produce shaking, further causing the dust on its inner wall to fall off.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly dry-type transformer, characterized in that: It includes a housing, a transformer body and a dustproof device; The transformer body is fixedly installed in the housing; An air inlet and an air outlet are provided on the shell; The dust-proof device comprises a filter cartridge, a driving member, a fixing ring and a fixing plate; the fixing ring is fixed to the air inlet of the outer shell, and the inner ring of the fixing ring is connected to the inside and outside of the outer shell; the filter cartridge is located in the outer shell, and is a conical cylindrical structure formed by spirally winding a strip-shaped filter plate, the conical cylindrical structure is coaxial with the fixing ring, and two adjacent circles of filter plates are slidably connected along the extension direction of the filter plate; a plurality of first sliders are arranged on the circumference of a circle of filter plates located at the large end of the filter cartridge, and each first slider is radially slidably mounted on the fixing ring along the fixing ring; and a circle of filter plates located at the large end of the filter cartridge is connected to the fixing ring through a retractable corrugated plate; the driving member is a motor, the output shaft of the motor is coaxial with the fixing ring, and can rotate under the drive of the motor and can idle when the motor is stopped; the fixing plate slides along the axial direction of the output shaft of the motor and can rotate under the drive of the output shaft of the motor; a plurality of second sliders are arranged on the circumference of a circle of filter plates located at the small end of the filter cartridge, and each second slider is radially slidably mounted on the fixing plate along the fixing ring.

2. The environmentally friendly dry-type transformer according to claim 1, characterized in that: A slide groove is provided along the extension direction of the filter plate on one side of the inner circle of the conical cylindrical structure, and balls are provided at intervals on one side of the outer circle of the conical cylindrical structure. The balls of two adjacent circles of filter plates slide in cooperation with the slide groove.

3. The environmentally friendly dry-type transformer according to claim 1, characterized in that: The inner ring of the fixed ring is provided with a plurality of first guide rails extending radially thereof, and each first slider is slidably mounted on a corresponding first guide rail; the fixed plate is provided with a plurality of second guide rails extending radially along the fixed ring, each second guide rail corresponds to a first guide rail, and each second slider is slidably mounted on a second guide rail.

4. The environmentally friendly dry-type transformer according to claim 1, characterized in that: The output shaft of the motor is a polygonal column, and a polygonal hole with the same cross section as the polygonal column is opened on the fixing plate. The fixing plate is slidably matched with the output shaft of the motor through the polygonal hole.

5. The environmentally friendly dry-type transformer according to claim 1, characterized in that: An extension rod is arranged in the shell, and the driving component is fixed to the extension rod.

6. The environmentally friendly dry-type transformer according to claim 1, characterized in that: The air inlet and the air outlet are both opened on the side wall of the shell, and the axis of the conical cylindrical structure of the filter cartridge is arranged horizontally.

7. The environmentally friendly dry-type transformer according to claim 6, characterized in that: A filter is installed at the air outlet.

8. The environmentally friendly dry-type transformer according to claim 1, characterized in that: An inspection door that can be opened and closed is installed on one of the side walls of the housing.

9. The environmentally friendly dry-type transformer according to claim 1, characterized in that: A top cover is installed on the top of the shell. The center of the top cover is high and the edge is low, and the edge of the top cover exceeds the side wall of the shell.

10. The environmentally friendly dry-type transformer according to claim 1, characterized in that: The inner side wall of the shell is provided with reinforcing ribs.

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