Dry-type three-dimensional roll core transformer

Abstract

This invention discloses a dry-type three-dimensional wound core transformer, relating to the field of transformer technology. It includes a transformer housing, multiple sets of front-to-back paired heat sinks housed within mounting frames on three sides, and a high-temperature repositioning component at the base of the frame: a lifting column, a rotating cylinder, a repositioning frame, a sliding frame, and a support rod. The front and rear heat sinks alternate via a lifting and rotating assembly. The top of the lifting column has a retractable displacement component: a slip ring, a pull rope, and a following detachment assembly to achieve folding displacement. A directional cleaning component is also provided at the top. This dry-type three-dimensional wound core transformer uses a temperature sensor to detect excessively high temperatures. When the temperature is too high, a drive plate moves the lifting column upwards. Through the cooperation of the telescopic column and the inclined slot, the symmetrical heat sinks rotate and reposition perpendicular to the housing direction. Low-temperature spare sinks are inserted, and high-temperature sinks are removed, resetting the temperature difference. The repositioning slot achieves folding displacement. The lateral movement distance is short, the structure is compact, and it is linked with the cleaning frame for cleaning, requiring no additional power and ensuring clean heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a dry-type three-dimensional wound core transformer. Background Technology

[0002] Currently, transformers are mainly planar laminated core transformers. However, with the implementation of national energy conservation and emission reduction policies, the market demands for transformers are increasing, and cost control is becoming more stringent. Against this backdrop, dry-type delta-wound core transformers have significant advantages. Dry-type delta-wound core transformers are energy-saving power transformers. They creatively reform the traditional laminated magnetic circuit structure and three-phase layout of power transformers, resulting in optimized product performance. The three-dimensional wound core has no seams between layers, the magnetic circuit is evenly distributed throughout, there are no obvious high-resistance areas, and there is no distortion of magnetic flux density at the seams. The three-phase magnetic circuit is completely symmetrical, resulting in significant energy savings, greatly reduced noise, stronger heat dissipation and overload capacity, and a compact structure and small size.

[0003] Because prolonged high-load operation can cause transformer temperatures to rise, cooling transformers is extremely important. Traditional dry-type three-dimensional wound core transformers generally use external heat sinks for heat dissipation, relying on natural convection heat exchange between the heat sinks and the surrounding air. However, during high-load operation, the internal temperature of the dry-type three-dimensional wound core transformer will rise rapidly in a short period of time. This passive temperature difference cooling method is difficult to remove and dissipate a large amount of heat in time, and cannot achieve efficient heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a dry-type three-dimensional wound core transformer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dry-type three-dimensional wound core transformer, comprising a transformer housing, the transformer housing being triangular in shape, a high-voltage terminal block installed on the top of the transformer housing, a low-voltage terminal block installed on the top of the transformer housing, a bottom cover installed on the bottom of the transformer housing, and mounting brackets fixedly installed on three sides of the transformer housing, and the inner wall of the mounting brackets being provided with several sets of heat sinks, each set of heat sinks being divided into front and rear sections; High-temperature repositioning components are equidistantly arranged inside the bottom side of the mounting frame. Each high-temperature repositioning component includes a lifting column slidably disposed inside the bottom side of the mounting frame. A rotating cylinder is sleeved on the outer wall of the lifting column. A repositioning frame is symmetrically fixedly connected to the outer wall of the rotating cylinder, and a sliding frame is slidably connected to the inner wall of the repositioning frame. A support rod is fixedly connected to the bottom of the heat sink corresponding to the sliding frame. A lifting and rotating assembly is provided on the outer wall of the lifting column so that, under high load, the sliding frame drives the front and rear heat sinks to alternate positions through the lifting and rotating assembly. Each of the lifting columns is provided with a retractable displacement component on its top outer wall. The retractable displacement component includes a slip ring sleeved on the top outer wall of the lifting column. Pull ropes are symmetrically fixed to the outer wall of the slip ring. The other ends of the two pull ropes are respectively fixedly connected to the side wall of the two sliding frames that are close to each other. The inner wall of the slip ring is provided with a follow-drop assembly so that during the repositioning process, the sliding frame can realize the folding and displacement of the two heat sinks through the follow-drop assembly. The top of the mounting bracket is also equipped with a directional cleaning component.

[0006] Preferably, the lifting and rotating assembly includes: A telescopic column is fixedly connected to the outer wall of one side of the lifting column. The outer wall of the rotating cylinder is rotatably connected to the bottom interior of the mounting frame. The inner wall of the rotating cylinder is symmetrically provided with oblique grooves corresponding to the telescopic column. The inner wall of the rotating cylinder is symmetrically provided with reset grooves corresponding to the telescopic column. The inner walls of the first and last ends of the two reset grooves are respectively connected and matched with the inner walls of the first and last ends of the two oblique grooves.

[0007] Preferably, a temperature sensor is fixedly installed on the outer wall of the transformer housing, and a plurality of transposition grooves are correspondingly opened on the bottom inner wall of the mounting bracket. The inner wall of the transposition groove is rectangular, and the outer wall of the support rod slides against the inner wall of the transposition groove. A limit groove is opened on the inner wall of the transposition groove, and a limit block is fixedly connected to the outer wall of the support rod. The outer wall of the limit block slides against the inner wall of the limit groove.

[0008] Preferably, drive push rods are fixedly installed at equal intervals on the top of the bottom cover, a drive plate is fixedly connected to the top of the three drive push rods, and the bottoms of the plurality of lifting columns are fixedly connected to the top of the drive plate.

[0009] Preferably, the follow-drop component includes: A guide buckle is symmetrically fixedly installed on the top of the rotating cylinder. One end of the pull rope passes through the inner wall of the guide buckle. The inner wall of the slip ring is symmetrically provided with grooves, and a second spring is fixedly connected to the inner wall of the groove. The other end of the second spring is fixedly connected to a locking post. The outer wall of the lifting post is provided with a first annular groove corresponding to the locking post, and the outer wall of the lifting post is provided with a second annular groove corresponding to the locking post.

[0010] Preferably, the inner wall depth of the inclined groove increases from one end to the other, the locking post forms an elastic telescopic structure with the groove through the second spring, and the end of the locking post facing the first annular groove is frustoconical.

[0011] Preferably, the outer walls of both sides of the sliding frame are fixedly connected with limit strips, and the inner walls of both sides of the shifting frame are correspondingly provided with limit grooves. The inner wall of the limit grooves is fixedly connected with a spring, and the other end of the spring is fixedly connected to one end of the limit strip.

[0012] Preferably, the directional cleaning component includes: A mounting plate is threaded onto the top of the mounting bracket. A cleaning frame is fixedly connected to the bottom of the mounting plate at equal intervals corresponding to the heat sink. The bottom of the cleaning frame is notched. A cleaning brush is fixedly installed on the inner wall of the cleaning frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This dry-type three-dimensional wound core transformer dissipates heat through multiple symmetrically arranged heat sinks during operation. Temperature sensors detect and control the process, enabling the transformer to overheat. When the transformer temperature becomes too high, a drive plate raises several lifting columns, which, in conjunction with the telescopic columns and inclined slots, cause the symmetrically arranged heat sinks to shift positions. Low-temperature standby heat sinks are moved into the working position, while high-temperature heat sinks are moved to the standby position. This ensures the heat source remains in contact with the low-temperature heat sinks, resetting the temperature difference between them to its maximum value. This effectively suppresses temperature rise in the dry-type transformer, protecting its service life.

[0014] 2. During the transposition process, the dry-type three-dimensional wound core transformer, through the setting of the transposition slot, prevents the whole body from moving circumferentially during the transposition process. Instead, it rotates and exchanges with each other in a direction perpendicular to the transformer shell. When transposing forward and backward, its lateral movement distance is significantly shortened, thereby reducing the space occupied. It forms a folding transposition, which can arrange more heat sink groups within the same shell size, or reduce the overall volume of the transformer without reducing the heat dissipation area, ensuring a compact structure and significantly improving the heat dissipation capacity in a limited space.

[0015] 3. During the transposition process, this dry-type three-dimensional wound core transformer can use transposition perpendicular to the transformer shell to fix its movement angle, thereby cooperating with the cleaning frame to achieve transposition and cleaning linkage without the need for additional power source or manual intervention, ensuring long-term cleanliness of the heat sink surface and maintaining stable heat exchange efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view schematic diagram of the overall structure of the present invention; Figure 3 This is a structural schematic diagram of the installation positions of some heat sinks in the overall invention; Figure 4 This is a schematic diagram showing the connection relationship between the lifting column and the rotating cylinder at the bottom of the mounting frame of the present invention; Figure 5 This is a schematic diagram showing the transmission relationship between the slip ring of the present invention and the lifting column and the sliding frame, respectively; Figure 6 This is a schematic diagram illustrating the movement relationship between the heat sink and the cleaning frame of the present invention.

[0017] In the diagram: 1. Transformer housing; 2. High-voltage terminal; 3. Low-voltage terminal; 4. Bottom cover; 5. Mounting bracket; 6. Heat sink; 10. Drive push rod; 11. Drive plate; 12. Transposition slot; 13. Limit slot one; 7. High-temperature transposition component; 701. Lifting column; 702. Rotating cylinder; 703. Telescopic column; 704. Angled slot; 705. Reset slot; 706. Transposition frame; 707. Sliding frame; 708 709. Support rod; 800. Limiting block; 801. Retractable displacement component; 802. Slip ring; 803. Pull rope; 804. Guide buckle; 805. Limiting strip; 806. Limiting groove two; 807. Spring one; 808. Groove; 809. Spring two; 810. Locking post; 811. First annular groove; 812. Second annular groove; 901. Directional cleaning component; 902. Mounting plate; 903. Cleaning frame; 904. Cleaning brush. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1, please refer to Figures 1-6 The present invention provides a dry-type three-dimensional wound core transformer, including a transformer housing 1, which is triangular in shape. A high-voltage terminal 2 and a low-voltage terminal 3 are installed on the top of the transformer housing 1. A bottom cover 4 is installed on the bottom of the transformer housing 1. Mounting brackets 5 are fixedly installed on the three sides of the transformer housing 1, and several sets of heat sinks 6 are provided on the inner wall of the mounting brackets 5. Each set of heat sinks 6 is divided into front and rear sections.

[0020] High-temperature switching components 7 are evenly spaced inside the bottom side of the mounting frame 5. The high-temperature switching components 7 include a lifting column 701 that is slidably disposed inside the bottom side of the mounting frame 5. A rotating cylinder 702 is sleeved on the outer wall of the lifting column 701. A switching frame 706 is symmetrically fixedly connected to the outer wall of the rotating cylinder 702. A sliding frame 707 is slidably connected to the inner wall of the switching frame 706. A support rod 708 is fixedly connected to the bottom of the heat sink 6 corresponding to the sliding frame 707. A lifting and rotating assembly is provided on the outer wall of the lifting column 701.

[0021] Specifically, when the temperature sensor detects that the internal temperature of the transformer housing 1 exceeds the set threshold, the controller immediately sends an upward command to the drive push rod 10. The three drive push rods 10 start synchronously, pushing the drive plate 11 to move smoothly upward. The drive plate 11 drives all the lifting columns 701 fixed on its top to rise synchronously and slowly along the vertical guide hole on the bottom inner wall of the mounting frame 5. The bottom of each lifting column 701 is fixedly connected to the drive plate 11, so the rising speed of all the lifting columns 701 is consistent, ensuring the synchronicity of the entire repositioning process. At the moment when the lifting column 701 begins to rise, the telescopic column 703 fixedly connected to the outer wall of one side of the lifting column 701 is exactly at the starting end of the inclined groove 704 opened in the inner wall of the rotating cylinder 702. The inner wall depth of the inclined groove 704 from the starting end to the ending end is spirally rising from low to high. At the same time, the outer wall of the rotating cylinder 702 is rotatably connected to the bottom inner side of the mounting frame 5, so the rotating cylinder 702 can rotate freely around its own axis without interfering with the mounting frame 5.

[0022] During the sliding process of the telescopic column 703 along the inclined groove 704, since the spiral stroke of the inclined groove 704 is fixed, when the lifting column 701 rises to half of the predetermined stroke, the rotating cylinder 702 just rotates ninety degrees; when the lifting column 701 rises to the highest point, the rotating cylinder 702 has rotated a total of one hundred and eighty degrees, thereby realizing the position swap of the front and rear heat sinks 6.

[0023] The lifting and rotating assembly includes a telescopic column 703 fixedly connected to the outer wall of one side of the lifting column 701. The outer wall of the rotating cylinder 702 is rotatably connected to the bottom interior of the mounting frame 5. The inner wall of the rotating cylinder 702 is symmetrically provided with inclined grooves 704 corresponding to the telescopic column 703. The inner wall of the rotating cylinder 702 is symmetrically provided with reset grooves 705 corresponding to the telescopic column 703. The inner walls of the first and last ends of the two reset grooves 705 are respectively connected and matched with the inner walls of the first and last ends of the two inclined grooves 704. The inner wall depth of the inclined grooves 704 increases from low to high from one end to the other in a spiral upward shape. The reset grooves 705 are vertical grooves with uniform inner wall depth.

[0024] When the lifting column 701 rises, the telescopic column 703 slides along the inclined groove 704. Since the inclined groove 704 is spirally upward, it forces the rotating cylinder 702 to rotate unidirectionally relative to the lifting column 701, with a rotation angle of 180 degrees. The rotating cylinder 702 drives the shifting frame 706 and the sliding frame 707 to rotate synchronously, thereby causing the two heat sinks 6 to rotate around the axis of the lifting column 701, achieving position alternation. When the lifting column 701 rises to its highest point, the telescopic column 703 slides into the top inlet of the reset groove 705. At this time, when the drive push rod 10 drives the lifting column 701 to descend, the telescopic column 703 slides vertically along the reset groove 705. Sliding straight down, the rotating cylinder 702 does not rotate; it simply returns to its vertical position with the lifting column 701. In one complete lifting cycle, only the upward phase involves a 180-degree repositioning, while the downward phase does not involve repositioning. This ensures that the two heat sinks 6 alternate in one direction, avoiding repeated oscillations. The standby heat sink 6, which is in a low-temperature state, is moved into the working position, while the high-temperature heat sink 6, which has already heated up, is moved to the standby position. This ensures that the heat source is always in contact with the low-temperature heat sink 6, resetting the temperature difference between the heat source and the heat sink 6 to its maximum value. This timely suppression of the temperature rise of the dry-type transformer protects its service life.

[0025] To achieve unidirectional rotational sliding, at the interfaces where the two ends of the inclined groove 704 connect with the reset groove 705, the inner wall of one end of the inclined groove 704 is deeper than the inner wall of the reset groove 705, while the inner wall of the other end of the inclined groove 704 is shallower than the inner wall of the reset groove 705. The end of the telescopic column 703 that slides with the inclined groove 704 can move slightly. When the telescopic column 703 enters the starting end of the inclined groove 704 from the reset groove 705, the inclined groove 704 is deeper, and one end of the telescopic column 703 pops out under elastic force and embeds itself deep, unable to retreat back into the shallower reset groove 705. When it reaches the ending end, the inclined groove 704 becomes shallower, forcing one end of the telescopic column 703 to compress, thus allowing it to smoothly slide into the top of the deeper reset groove 705 without retreating back into the inclined groove 704. Therefore, depending on the groove depth, it cannot retreat at the inner wall positions of the initial and ending ends, achieving unidirectional rotational movement.

[0026] The bottom inner wall of the mounting bracket 5 has several repositioning slots 12, the inner wall of which is rectangular. The outer wall of the support rod 708 slides against the inner wall of the repositioning slot 12. A limiting groove 13 is provided on the inner wall of the repositioning slot 12, and a limiting block 709 is fixedly connected to the outer wall of the support rod 708. The outer wall of the limiting block 709 slides against the inner wall of the limiting groove 13. Through the constraint of the repositioning slots 12 and the limiting block 709, the heat sink 6 always moves perpendicular to the transformer housing 1 during the repositioning process, without circumferential oscillation, thus avoiding occupying the arrangement space.

[0027] In embodiment two, based on the above embodiment, a retractable displacement component 8 is provided on the top outer wall of several lifting columns 701. The retractable displacement component 8 includes a slip ring 801 sleeved on the top outer wall of the lifting column 701. Pull ropes 802 are symmetrically fixedly connected to the outer wall of the slip ring 801. The other ends of the two pull ropes 802 are respectively fixedly connected to the side wall of the two sliding frames 707 that are close to each other.

[0028] The inner wall of slip ring 801 is provided with a follow-drop component.

[0029] Furthermore, the follow-up detachment assembly includes guide buckles 803 symmetrically fixedly installed on the top of the rotating cylinder 702, with one end of the pull rope 802 passing through the inner wall of the guide buckle 803. The guide buckle 803 provides a fulcrum for the pull rope 802, ensuring the pull rope 802 remains directionally stable when tightened, and preventing contact interference between the pull rope 802 and the heat sink 6 or other moving parts. The inner wall of the slip ring 801 has symmetrically formed grooves 807, and a second spring 808 is fixedly connected to the inner wall of the groove 807. The other end of the second spring 808 is fixedly connected to a locking post 809. The outer wall of the lifting column 701 has a first annular groove 810 corresponding to the locking post 809, and a second annular groove 811 corresponding to the locking post 809. The locking post 809 forms an elastic telescopic structure with the second spring 808 and the groove 807, and the end of the locking post 809 facing the first annular groove 810 is frustoconical.

[0030] Limiting strips 804 are fixedly connected to the outer walls of both sides of the sliding frame 707. Limiting grooves 805 are correspondingly opened on the inner walls of both sides of the shifting frame 706. A spring 806 is fixedly connected to the inner wall of the limiting groove 805, and the other end of the spring 806 is fixedly connected to one end of the limiting strip 804.

[0031] In the initial stage of the rising column 701, the slip ring 801 engages with the first annular groove 810 on the outer wall of the rising column 701 through the locking pin 809 in the groove 807 symmetrically opened on its inner wall, so that the slip ring 801 and the rising column 701 remain relatively fixed. At this time, the two pull ropes 802 symmetrically fixedly connected to the outer wall of the slip ring 801 are in a naturally relaxed state and no tension is applied to the sliding frame 707. As the rising column 701 continues to rise, the rotating cylinder 702 begins to rotate under the drive of the telescopic column 703 and the inclined groove 704. The shifting frame 706 fixedly connected to the outer wall of the rotating cylinder 702 rotates accordingly. The sliding frame 707 slidably connected to the inner wall of the shifting frame 706 and the heat sink 6 connected by the support rod 708 gradually deviate from their original front and rear positions.

[0032] Since the slip ring 801 is still rising synchronously with the lifting column 701 and the slip ring 801 does not slide relative to the lifting column 701, the two pull ropes 802 fixed to the outer wall of the slip ring 801 are gradually straightened. The middle part of the pull rope 802 passes through the inner wall of the guide buckle 803 fixedly installed at the top of the rotating cylinder 702. The guide buckle 803 provides a fulcrum for the pull rope 802, so that the pull rope 802 maintains a stable direction when tightened, and avoids contact interference between the pull rope 802 and the heat sink 6 or other moving parts.

[0033] As the slip ring 801 continues to rise, the inward traction force applied by the pull rope 802 to the sliding frame 707 gradually increases. The limiting strip 804, which is fixedly connected to the outer walls on both sides of the sliding frame 707, overcomes the elastic force of the spring 806, which is fixedly connected to the inner wall of the limiting groove 805, and slides along the limiting groove 805 on the inner wall of the transposition frame 706 towards the center of the transposition frame 706, thereby causing the entire sliding frame 707 to retract inward. This retraction action reaches the limit position when the rotating cylinder 702 rotates ninety degrees. At this time, the minimum gap between the two adjacent transposition frames 706 changes from a state that may have contact interference to a safe distance, thereby avoiding the collision of the heat sink 6 during the transposition process.

[0034] As rotation continues, the pull rope 802 can no longer pull the sliding frame 707, causing the locking post 809 to disengage from the first annular groove 810 under the action of the inclined plane and spring into the second annular groove 811 under the action of the second spring 808. At this time, the slip ring 801 slides downward relative to the lifting post 701, and the tension of the pull rope 802 is released instantly. The sliding frame 707 resets outward under the action of the first spring 806, so that it can continue to guide the bottom support rod 708 of the heat sink 6 during the subsequent rotation to the end of the inclined groove 704. At this time, the transposition is completed. During the transposition process, the transposition groove 12 prevents the whole structure from moving in a circle during the transposition process. Instead, it rotates and exchanges with each other in a direction perpendicular to the transformer housing 1. When it transposes back and forth, its lateral movement distance is significantly shortened, thereby reducing the space occupied and forming a folding transposition. More sets of heat sinks 6 can be arranged within the same housing size, or the overall volume of the transformer can be reduced without reducing the heat dissipation area, ensuring a compact structure and significantly improving the heat dissipation capacity in a limited space.

[0035] Next, the lifting column 701 descends. When the lifting column 701 descends to near the lowest point, the frustum-shaped end of the locking column 809 contacts the upper edge of the first annular groove 810, forcing the locking column 809 to compress the second spring 808 and slide out of the second annular groove 811. Finally, it re-engages into the first annular groove 810, completing a complete repositioning cycle. At this time, the sliding frame 707 is in the unfolded state, ready for the next repositioning.

[0036] In Example 3, based on the above examples, the top of the mounting bracket 5 is further provided with a directional cleaning component 9.

[0037] Furthermore, the directional cleaning component 9 includes a mounting plate 901 threaded onto the top of the mounting bracket 5. The bottom of the mounting plate 901 is fixedly connected to a cleaning bracket 902 at equal intervals to the heat sink 6. The bottom of the cleaning bracket 902 is notched, and a cleaning brush 903 is fixedly installed on the inner wall of the cleaning bracket 902.

[0038] The cleaning rack 902 is positioned on the path of the heat sink 6's repositioning movement. Specifically, when the heat sink 6 is driven by the high-temperature repositioning component 7 and the shrinking displacement component 8 to rotate and move from the working position to the standby position along the repositioning groove 12, the fins of the heat sink 6 just pass through the notch of the cleaning rack 902, and the surface of the heat sink 6 slides relative to the cleaning brush 903. The cleaning brush 903 scrapes or brushes off or removes the dust, oil and other contaminants attached to the surface of the heat sink 6.

[0039] Since the cleaning rack 902 is fixedly installed on the top of the mounting bracket 5, and the heat sink 6 must pass through this fixed path every time it is moved, each repositioning action automatically completes a cleaning, without the need for additional power source or manual intervention, ensuring that the surface of the heat sink 6 is clean for a long time and maintaining stable heat exchange efficiency.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dry-type three-dimensional wound core transformer, comprising a transformer housing (1), characterized in that: The transformer housing (1) is triangular in shape. A high-voltage terminal (2) is installed on the top of the transformer housing (1), a low-voltage terminal (3) is installed on the top of the transformer housing (1), a bottom cover (4) is installed on the bottom of the transformer housing (1), and mounting brackets (5) are fixedly installed on the three sides of the transformer housing (1). Several sets of heat sinks (6) are provided on the inner wall of the mounting brackets (5), and each set of heat sinks (6) is divided into front and rear. High-temperature switching components (7) are provided at equal intervals on the bottom side of the mounting frame (5). The high-temperature switching components (7) include a lifting column (701) that is slidably disposed inside the bottom side of the mounting frame (5). A rotating cylinder (702) is sleeved on the outer wall of the lifting column (701). A switching frame (706) is symmetrically fixedly connected to the outer wall of the rotating cylinder (702). A sliding frame (707) is slidably connected to the inner wall of the switching frame (706). A support rod (708) is fixedly connected to the bottom of the heat sink (6) corresponding to the sliding frame (707). A lifting and rotating assembly is provided on the outer wall of the lifting column (701) so that when working under high load, the sliding frame (707) drives the front and rear heat sinks (6) to alternate positions through the lifting and rotating assembly. The top outer wall of several of the lifting columns (701) is provided with a retractable displacement component (8). The retractable displacement component (8) includes a slip ring (801) sleeved on the top outer wall of the lifting column (701). The outer wall of the slip ring (801) is symmetrically fixedly connected with a pull rope (802). The other end of the two pull ropes (802) is fixedly connected to the side wall of the two sliding frames (707) respectively. The inner wall of the slip ring (801) is provided with a follow-drop component so that during the repositioning process, the sliding frame (707) can realize the folding and displacement of the two heat sinks (6) through the follow-drop component. The top of the mounting bracket (5) is also provided with a directional cleaning component (9).

2. A dry-type three-dimensional wound core transformer according to claim 1, characterized in that, The lifting and rotating assembly includes: A telescopic column (703) is fixedly connected to the outer wall of one side of the lifting column (701). The outer wall of the rotating cylinder (702) is rotatably connected to the bottom side of the mounting frame (5). The inner wall of the rotating cylinder (702) is symmetrically provided with inclined grooves (704) corresponding to the telescopic column (703). The inner wall of the rotating cylinder (702) is symmetrically provided with reset grooves (705) corresponding to the telescopic column (703). The inner walls of the first and last ends of the two reset grooves (705) are respectively connected and matched with the inner walls of the first and last ends of the two inclined grooves (704).

3. A dry-type three-dimensional wound core transformer according to claim 1, characterized in that, A temperature sensor is fixedly installed on the outer wall of the transformer housing (1). A number of transposition grooves (12) are opened on the bottom inner wall of the mounting bracket (5). The inner wall of the transposition groove (12) is rectangular. The outer wall of the support rod (708) slides against the inner wall of the transposition groove (12). A limit groove (13) is opened on the inner wall of the transposition groove (12). A limit block (709) is fixedly connected to the outer wall of the support rod (708). The outer wall of the limit block (709) slides against the inner wall of the limit groove (13).

4. A dry-type three-dimensional wound core transformer according to claim 1, characterized in that, The top of the bottom cover (4) is fixedly installed with drive push rods (10) at equal intervals. The top of the three drive push rods (10) is fixedly connected to the drive plate (11). The bottom of the several lifting columns (701) is fixedly connected to the top of the drive plate (11).

5. A dry-type three-dimensional wound core transformer according to claim 2, characterized in that, The follow-detachment component includes: A guide buckle (803) is symmetrically fixedly installed on the top of the rotating cylinder (702). One end of the pull rope (802) passes through the inner wall of the guide buckle (803). The inner wall of the slip ring (801) is symmetrically provided with grooves (807), and the inner wall of the groove (807) is fixedly connected with a second spring (808). The other end of the second spring (808) is fixedly connected with a locking post (809). The outer wall of the lifting column (701) is provided with a first annular groove (810) corresponding to the locking post (809), and the outer wall of the lifting column (701) is provided with a second annular groove (811) corresponding to the locking post (809).

6. A dry-type three-dimensional wound core transformer according to claim 5, characterized in that, The inner wall depth of the inclined groove (704) increases from one end to the other. The locking post (809) forms an elastic telescopic structure with the groove (807) through the second spring (808), and the end of the locking post (809) facing the first annular groove (810) is truncated cone-shaped.

7. A dry-type three-dimensional wound core transformer according to claim 6, characterized in that, Limiting strips (804) are fixedly connected to the outer walls of both sides of the sliding frame (707), and limiting grooves (805) are correspondingly opened on the inner walls of both sides of the shifting frame (706). A spring (806) is fixedly connected to the inner wall of the limiting groove (805), and the other end of the spring (806) is fixedly connected to one end of the limiting strip (804).

8. A dry-type three-dimensional wound core transformer according to claim 1, characterized in that, The directional cleaning component (9) includes: A mounting plate (901) is threaded onto the top of the mounting bracket (5). A cleaning bracket (902) is fixedly connected at equal distances to the bottom of the mounting plate (901) corresponding to the heat sink (6). The bottom of the cleaning bracket (902) is notched. A cleaning brush (903) is fixedly installed on the inner wall of the cleaning bracket (902).

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