A heat pipe cooled dry-type transformer

Abstract

The present invention discloses a dry-type transformer with heat pipe cooling, which relates to the technical field of transformers and includes: a base, the base is cast on the ground by cement; a dry-type transformer, the dry-type transformer is fixedly installed on the top of the base; a support plate, the support plate is fixedly installed on the top of the dry-type transformer; a heat pipe radiator, the heat pipe radiator is fixedly penetrated through the top of the support plate, and the bottom of the heat pipe radiator is in contact with the top of the dry-type transformer; a mounting rack, the mounting rack is fixedly installed on the top of the support plate, and docking grooves are formed on the surface of the mounting rack; an axial flow fan, the axial flow fan is slidably installed on the inner wall of the mounting rack; natural heat dissipation is relied on the heat pipe radiator when the temperature is low, and the axial flow fan is started to assist heat dissipation when the temperature is high, so as to realize seasonal dual-mode heat dissipation and reduce unnecessary fan energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly to a dry-type transformer with heat pipe cooling. Background Art

[0002] A dry-type transformer with heat pipe cooling is an innovative power equipment that combines the high-efficiency heat transfer technology of heat pipes with the design of traditional dry-type transformers, mainly used to solve the heat dissipation problem during the operation of transformers and improve energy efficiency and reliability.

[0003] The patent with the patent publication number CN111292929B relates to a resin-cast dry-type transformer with heat pipe cooling, including a transformer body, a top seat, a bottom seat, a heat pipe cooling component, a driving component, a control system, and a positioning component; the positioning component located on the bottom seat is arranged at the bottom end of the transformer body; the top seat is arranged at the top of the transformer body, and a fan is arranged on the top seat; the air outlet end of the fan faces the transformer body; the heat pipe cooling components are symmetrically arranged on both sides of the transformer body, and temperature detectors are arranged on the heat pipe cooling components; the driving component for controlling the movement of the heat pipe cooling component is arranged in the bottom seat. This patent sets the heat pipe cooling component and the fan to work alternately to achieve the cooling of the transformer body, with low energy consumption and high efficiency; the positioning component is set, on the one hand, to ensure the stability and safety of the transformer body, and on the other hand, to make the cooling effect of the heat pipe cooling component uniform and efficient.

[0004] In the above patent, it has the characteristics of uniform and efficient cooling effect. The cooling of the transformer body is achieved by the heat pipe cooling component and the fan working alternately, with low energy consumption and high efficiency. However, during the actual cooling process, due to seasonal changes, the ambient temperature around the dry-type transformer will be different. When the ambient temperature is low, the heat pipe cooling component can effectively maintain the normal working state of the dry-type transformer through natural heat dissipation. At this time, continuing to use the fan for cooling not only has no actual need but also causes waste of energy consumption, increases the unnecessary energy burden, and reduces the energy efficiency of the overall system. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a dry-type transformer with heat pipe cooling, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A heat pipe cooled dry-type transformer, comprising: a base, which is cast on the ground with cement; a dry-type transformer, which is fixedly installed on the top of the base; a support plate, which is fixedly installed on the top of the dry-type transformer; a heat pipe radiator, which is fixedly penetrated through the top of the support plate, and the bottom of the heat pipe radiator contacts the top of the dry-type transformer, and the heat is conducted to the heat pipe radiator, and the temperature of the highest point of the dry-type transformer is reduced through the continuous heat dissipation cycle of the heat pipe radiator; a mounting rack, which is fixedly installed on the top of the support plate, and a docking groove is formed on the surface of the mounting rack; an axial flow fan, which is slidably installed on the inner wall of the mounting rack; a plug, which is arranged on the surface of the axial flow fan, and the plug is electrically connected to the axial flow fan; a grip rod, which is fixedly installed on the side of the axial flow fan away from the plug; a power supply device, which is fixedly installed on the top of the support plate, and a socket is arranged on the side of the power supply device close to the plug, and the power supply device outputs power through the socket, and the plug passes through the docking groove and is connected to the socket of the power supply device, so as to start the axial flow fan to forcibly dissipate heat from the heat pipe radiator.

[0007] According to the above technical solution, a resisting rod is fixedly installed on the side of the axial flow fan close to the plug, and a protective plate is rotatably installed on the surface of the mounting rack. The side of the resisting rod close to the protective plate is formed as a spherical surface, and the spherical surface of the resisting rod applies a thrust to the protective plate, causing the protective plate to rotate away from the grip rod.

[0008] According to the above technical solution, a through hole is formed on the surface of the mounting rack, and the size of the through hole is adapted to that of the resisting rod. The top of the axial flow fan applies a support to the protective plate, and the resisting rod continues to move through the through hole. A rectangular groove is formed on the circumferential surface of the resisting rod.

[0009] According to the above technical solution, a self-locking device for improving the heat dissipation stability and an auxiliary device for ensuring the stable connection of the plug are provided on the mounting rack; the self-locking device includes a hollow frame, a telescopic rod, a first spring and a limiting block. The hollow frame is fixedly installed on the surface of the mounting rack, the telescopic rod is slidably penetrated through the top of the hollow frame, the first spring is arranged between the telescopic rod and the hollow frame, and the telescopic rod moves to compress the first spring. When the resisting rod reaches the designated position, the deformed first spring releases elastic force to drive the telescopic rod to move upward. The limiting block is fixedly installed on the top of the telescopic rod, and an inclined surface is formed on the top of the limiting block. After the resisting rod passes through the through hole, its spherical surface presses the inclined surface of the limiting block, causing the limiting block to move downward.

[0010] According to the above technical solution, a collar is rotatably mounted on the circumferential surface of the telescopic rod. A pull rod is fixedly mounted on the circumferential surface of the collar. An arc-shaped block is fixedly mounted on the circumferential surface of the collar. A rectangular plate is fixedly mounted on the top of the hollow frame. A linkage plate is fixedly mounted on the circumferential surface of the telescopic rod. The movement of the limit block drives the telescopic rod to move downward. The movement of the telescopic rod drives the collar and the linkage plate to move downward synchronously. A long slot and a short slot are formed in the rectangular plate. The arc-shaped block contacts the inner wall of the long slot.

[0011] According to the above technical solution, a torsion spring is arranged between the collar and the telescopic rod. When the collar rotates, the torsion spring is stretched. When the staff releases the pull rod, the restoration of the torsion spring drives the collar to rotate back. A sliding slot is formed on the surface of the hollow frame. The linkage plate contacts the inner wall of the sliding slot.

[0012] According to the above technical solution, the auxiliary device includes a connecting frame, a sliding rod, an L-shaped plate, a flat plate, a second spring and a rubber sheet. When the linkage plate moves downward, its bottom contacts the top of the L-shaped plate and applies pressure, so that the linkage plate drives the L-shaped plate to move downward. The connecting frame is fixedly mounted on the surface of the carrying frame. The sliding rod slidably penetrates through the surface of the connecting frame. The L-shaped plate is fixedly mounted on the top of the sliding rod. The flat plate is fixedly mounted on the bottom of the sliding rod. The second spring is arranged between the flat plate and the connecting frame. The flat plate stretches the second spring during movement. The stretched second spring releases elastic force to drive the flat plate to move upward. The rubber sheet is fixedly mounted on the top of the flat plate.

[0013] According to the above technical solution, a circular block is fixedly mounted on the surface of the L-shaped plate close to the sliding slot. A circular rod penetrates through the surface of the flat plate. The circular block contacts the inner wall of the sliding slot. When the circular block moves in the sliding slot, the circular block is guided by the sliding slot and moves in the vertical direction along the sliding slot. A guiding slot is formed on the surface of the connecting frame close to the circular rod. The circular rod contacts the inner wall of the guiding slot. When the circular rod moves in the guiding slot, the circular rod is guided by the guiding slot.

[0014] The present invention provides a dry-type transformer with heat pipe cooling. It has the following beneficial effects:

[0015] (1) For the dry-type transformer with heat pipe cooling, the protective plate plays a protective role for the axial flow fan during storage. When relying only on the natural heat dissipation of the heat pipe radiator, the protective plate can effectively prevent dust particles from entering the interior of the axial flow fan, keep the fan clean and extend its service life. At the same time, the plug is connected to the socket to start the axial flow fan to conduct forced heat dissipation for the heat pipe radiator. By relying on the natural heat dissipation of the heat pipe radiator at a lower temperature and starting the axial flow fan to assist heat dissipation at a higher temperature, seasonal dual-mode heat dissipation is realized, reducing unnecessary fan energy consumption.

[0016] (2) In this dry-type transformer with heat pipe cooling, the limiting block contacts the rectangular groove to apply a limit to the abutting rod. Through automatic limiting, the abutting rod is firmly locked in a specified position, preventing the axial flow fan from moving due to vibration or external interference, thus ensuring the stable operation of the forced cooling mode. At the same time, the arc-shaped block contacts the inner wall of the short groove to limit its vertical movement. Through simple operations, the staff can freely choose whether to enable the self-locking function of the limiting block, thereby improving the flexibility of switching the cooling mode.

[0017] (3) In this dry-type transformer with heat pipe cooling, the flat plate presses the rubber sheet, making the rubber sheet fit tightly with the plug. Through the synchronous movement of the L-shaped plate and the linkage plate, the rubber sheet fits tightly with the plug, ensuring good contact between the plug and the socket. At the same time, the circular block moves vertically along the sliding groove, and the circular rod moves vertically along the guiding groove. The overall movement smoothness is improved through the circular block and the circular rod, ensuring that the rubber sheet can fit smoothly with the plug, thereby guaranteeing the smoothness of the overall operation. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the support plate structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the position structure of the heat pipe radiator of the present invention;

[0021] Figure 4 It is a schematic diagram of the internal structure of the carrier frame of the present invention;

[0022] Figure 5 It is a schematic diagram of the position structure of the carrier frame and the hollow frame of the present invention;

[0023] Figure 6 It is a schematic diagram of the position structure of the arc-shaped block and the rectangular plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the internal structure of the hollow frame of the present invention.

[0025] In the figure: 1, base; 2, dry-type transformer; 3, support plate; 4, heat pipe radiator; 5, carrier frame; 6, axial flow fan; 7, plug; 8, grip rod; 9, power supply device; 10, abutting rod; 11, protective plate; 121, hollow frame; 122, telescopic rod; 123, first spring; 124, limiting block; 125, collar; 126, pull rod; 127, arc-shaped block; 128, rectangular plate; 129, linkage plate; 131, connecting frame; 132, sliding rod; 133, L-shaped plate; 134, flat plate; 135, second spring; 136, rubber sheet; 137, circular block; 138, circular rod. Detailed Embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 - Figure 5 , an embodiment of the present invention is: a heat pipe cooling dry-type transformer, including: a base 1, the base 1 is poured on the ground by cement; a dry-type transformer 2, the dry-type transformer 2 is fixedly installed on the top of the base 1; a support plate 3, the support plate 3 is fixedly installed on the top of the dry-type transformer 2; a heat pipe radiator 4, the heat pipe radiator 4 is fixedly penetrated through the top of the support plate 3, and the bottom of the heat pipe radiator 4 is in contact with the top of the dry-type transformer 2; a mounting rack 5, the mounting rack 5 is fixedly installed on the top of the support plate 3, and a docking groove is provided on the surface of the mounting rack 5; an axial flow fan 6, the axial flow fan 6 is slidably installed on the inner wall of the mounting rack 5; a plug 7, the plug 7 is arranged on the surface of the axial flow fan 6, and the plug 7 is electrically connected to the axial flow fan 6; a grip rod 8, the grip rod 8 is fixedly installed on one side of the axial flow fan 6 away from the plug 7; a power supply device 9, the power supply device 9 is fixedly installed on the top of the support plate 3, a socket is provided on one side of the power supply device 9 close to the plug 7, and the power supply device 9 outputs power through the socket. When the temperature is relatively low, natural cooling is relied on the heat pipe radiator 4, and when the temperature is relatively high, the axial flow fan 6 is started to assist in cooling, realizing seasonal dual-mode cooling and reducing unnecessary fan energy consumption.

[0028] A resisting rod 10 is fixedly installed on one side of the axial flow fan 6 close to the plug 7, and a protective plate 11 is rotatably installed on the surface of the mounting rack 5. The surface of the resisting rod 10 close to the protective plate 11 is formed into a spherical surface. When only relying on the natural cooling of the heat pipe radiator 4, the protective plate 11 can effectively prevent dust particles from entering the interior of the axial flow fan 6, keep the fan clean and extend its service life.

[0029] A through hole is provided on the surface of the mounting rack 5, and the size of the through hole is adapted to that of the resisting rod 10. A rectangular groove is provided on the circumferential surface of the resisting rod 10. By providing the through hole, it is helpful to enhance the stability of the axial flow fan 6 during operation, thereby ensuring the smooth progress of forced cooling.

[0030] During the operation of this embodiment, the heat generated by the dry-type transformer 2 during operation will be conducted to the heat pipe radiator 4, and the temperature of the highest point of the dry-type transformer 2 is reduced through the continuous heat dissipation cycle of the heat pipe radiator 4. When it is necessary to enable the axial flow fan 6 to strengthen heat dissipation, the staff pushes the grip rod 8 in the direction of the power supply device 9. The movement of the grip rod 8 drives the axial flow fan 6 to move in the direction of the power supply device 9. The movement of the axial flow fan 6 drives the plug 7 and the abutting rod 10 to move synchronously. During the movement, the spherical surface of the abutting rod 10 exerts a thrust on the protection plate 11, causing the protection plate 11 to rotate away from the grip rod 8. When the protection plate 11 rotates to the preset position, it disengages from the abutting rod 10. At this time, the top of the axial flow fan 6 will exert a support on the protection plate 11, while the abutting rod 10 continues to move through the through hole. At the same time, the plug 7 moves through the docking groove and finally connects to the socket of the power supply device 9, thereby starting the axial flow fan 6 to forcibly dissipate heat from the heat pipe radiator 4. By relying on the natural heat dissipation of the heat pipe radiator 4 at a lower temperature and starting the axial flow fan 6 to assist in heat dissipation at a higher temperature, seasonal dual-mode heat dissipation is realized, reducing unnecessary fan energy consumption. When the axial flow fan 6 does not need to work, the staff controls the grip rod 8 to reset and move it away from the power supply device 9. The movement of the grip rod 8 drives the axial flow fan 6 to move synchronously. The movement of the axial flow fan 6 drives the plug 7 to move synchronously. The movement of the plug 7 disengages from the socket, thereby cutting off the power supply and stopping the axial flow fan 6 from working. When the axial flow fan 6 moves to the initial position, the support force it exerts on the protection plate 11 gradually decreases. At this time, the protection plate 11 automatically rotates back to the initial position under its own gravity, playing a protective role for the axial flow fan 6 in storage. When relying only on the natural heat dissipation of the heat pipe radiator 4, the protection plate 11 can effectively prevent dust particles from entering the interior of the axial flow fan 6, keeping the fan clean and extending its service life.

[0031] Please refer to Figure 1 - Figure 7 , on the basis of the above embodiment, in another embodiment of the present invention, a self-locking device for improving heat dissipation stability and an auxiliary device for ensuring stable connection of the plug 7 are provided on the mounting rack 5; the self-locking device includes a hollow frame 121, a telescopic rod 122, a first spring 123 and a limit block 124. The hollow frame 121 is fixedly installed on the surface of the mounting rack 5. The telescopic rod 122 slides through the top of the hollow frame 121. The first spring 123 is arranged between the telescopic rod 122 and the hollow frame 121. The limit block 124 is fixedly installed on the top of the telescopic rod 122. An inclined surface is provided on the top of the limit block 124. Through automatic limiting, the abutting rod 10 is firmly locked in a specified position to prevent the axial flow fan 6 from moving due to vibration or external interference, thereby ensuring the stable operation of the forced cooling mode.

[0032] A collar 125 is rotatably mounted on the circumferential surface of the telescopic rod 122. A pull rod 126 is fixedly mounted on the circumferential surface of the collar 125, and an arc-shaped block 127 is fixedly mounted on the circumferential surface of the collar 125. A rectangular plate 128 is fixedly mounted on the top of the hollow frame 121. A linkage plate 129 is fixedly mounted on the circumferential surface of the telescopic rod 122. A long slot and a short slot are formed in the rectangular plate 128. The arc-shaped block 127 is in contact with the inner wall of the long slot. Through simple operations, the staff can freely choose whether to enable the self-locking function of the limit block 124, thereby improving the flexibility of switching the cooling mode.

[0033] A torsion spring is arranged between the collar 125 and the telescopic rod 122. A sliding groove is formed on the surface of the hollow frame 121. The linkage plate 129 is in contact with the inner wall of the sliding groove. By arranging the torsion spring, it is prevented that the pull rod 126 rotates accidentally and affects the stable progress of cooling.

[0034] The auxiliary device includes a connecting frame 131, a sliding rod 132, an L-shaped plate 133, a flat plate 134, a second spring 135 and a rubber sheet 136. The connecting frame 131 is fixedly mounted on the surface of the carrying frame 5. The sliding rod 132 slidably penetrates through the surface of the connecting frame 131. The L-shaped plate 133 is fixedly mounted on the top of the sliding rod 132. The flat plate 134 is fixedly mounted on the bottom of the sliding rod 132. The second spring 135 is arranged between the flat plate 134 and the connecting frame 131. The rubber sheet 136 is fixedly mounted on the top of the flat plate 134. Through the synchronous movement of the L-shaped plate 133 and the linkage plate 129, the rubber sheet 136 is tightly attached to the plug 7, ensuring good contact between the plug 7 and the socket.

[0035] A circular block 137 is fixedly mounted on the side of the L-shaped plate 133 close to the sliding groove. A circular rod 138 is fixedly penetrated through the surface of the flat plate 134. The circular block 137 is in contact with the inner wall of the sliding groove. A guiding groove is formed on the side of the connecting frame 131 close to the circular rod 138. The circular rod 138 is in contact with the inner wall of the guiding groove. The overall movement stability is improved through the circular block 137 and the circular rod 138, ensuring that the rubber sheet 136 can be smoothly attached to the plug 7, thereby guaranteeing the smoothness of the overall operation. No

[0036] When the present embodiment is working, after the abutting rod 10 passes through the through hole, the spherical surface thereof presses against the inclined surface of the limiting block 124, causing the limiting block 124 to move downward. The movement of the limiting block 124 drives the telescopic rod 122 to move downward. The movement of the telescopic rod 122 drives the collar 125 and the linkage plate 129 to move downward synchronously, and presses against the first spring 123 during the movement. When the abutting rod 10 reaches the designated position, the deformed first spring 123 releases elastic force to drive the telescopic rod 122 to move upward. The movement of the telescopic rod 122 drives the limiting block 124 to move upward to contact the inner wall of the rectangular groove, thereby applying a limit to the abutting rod 10 to prevent its accidental movement. When the staff controls the grip rod 8 to reset, the limit needs to be released first. The staff controls the pull rod 126 to move downward. The movement of the pull rod 126 drives the collar 125 to move downward. The movement of the collar 125 drives the telescopic rod 122 to move downward. The movement of the telescopic rod 122 drives the limiting block 124 to move downward until the limiting block 124 completely disengages from the rectangular groove, releasing the limit on the abutting rod 10. At this time, the grip rod 8 can move freely. By automatically limiting, the abutting rod 10 is firmly locked in the designated position, preventing the axial flow fan 6 from moving due to vibration or external interference, thereby ensuring the stable operation of the forced cooling mode. When the self-locking of the limiting block 124 is not required, the staff rotates the pull rod 126 away from the mounting frame 5. The rotation of the pull rod 126 drives the collar 125 to rotate synchronously. When the collar 125 rotates, it stretches the torsion spring and drives the arc-shaped block 127 to rotate towards the mounting frame 5. When the arc-shaped block 127 rotates to the preset angle, the surface of the arc-shaped block 127 in contact with the long groove separates. At this time, the staff pushes the pull rod 126 downward. The movement of the pull rod 126 drives the collar 125 to move downward. The movement of the collar 125 drives the telescopic rod 122 and the arc-shaped block 127 to move downward synchronously. The movement of the telescopic rod 122 drives the limiting block 124 and the linkage plate 129 to move downward synchronously, and presses against the first spring 123 during the movement. When the arc-shaped block 127 moves downward to the preset position, the staff rotates the pull rod 126 back to the initial angle, so that the synchronously rotating arc-shaped block 127 contacts the inner wall of the short groove, restricting its vertical movement. Through simple operations, the staff can freely choose whether to enable the self-locking function of the limiting block 124, thereby improving the flexibility of the cooling mode switching;

[0037] When the linkage plate 129 moves downward, the bottom of the linkage plate 129 contacts the top of the L-shaped plate 133 and applies pressure, causing the linkage plate 129 to drive the L-shaped plate 133 to move downward. The movement of the L-shaped plate 133 drives the sliding rod 132 to move downward, the movement of the sliding rod 132 drives the flat plate 134 to move downward, the movement of the flat plate 134 drives the rubber sheet 136 to move downward, and the second spring 135 is stretched during the movement. When the linkage plate 129 starts to reset upward, the pressure exerted by the linkage plate 129 on the L-shaped plate 133 gradually decreases. At this time, the stretched second spring 135 releases elastic force to drive the flat plate 134 to move upward. The movement of the flat plate 134 drives the rubber sheet 136 and the sliding rod 132 to move upward synchronously until the rubber sheet 136 contacts the plug 7. After the rubber sheet 136 contacts the plug 7, it stops moving, while the flat plate 134 continues to move and presses the rubber sheet 136, so that the rubber sheet 136 is in close contact with the plug 7. Through the synchronous movement of the L-shaped plate 133 and the linkage plate 129, the rubber sheet 136 is in close contact with the plug 7, ensuring good contact between the plug 7 and the socket. When the L-shaped plate 133 moves, the movement of the L-shaped plate 133 drives the circular block 137 to move synchronously. When the circular block 137 moves in the chute, the circular block 137 is guided by the chute and moves in the vertical direction along the chute, which helps to improve the smoothness of the movement of the L-shaped plate 133. When the flat plate 134 moves, the movement of the flat plate 134 drives the circular rod 138 to move synchronously. When the circular rod 138 moves in the guiding groove, the circular rod 138 is guided by the guiding groove and moves in the vertical direction along the guiding groove, which helps to improve the smoothness of the movement of the flat plate 134. The smoothness of the overall movement is improved through the circular block 137 and the circular rod 138, ensuring that the rubber sheet 136 can be smoothly attached to the plug 7, thereby ensuring the smoothness of the overall operation.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry-type transformer with heat pipe cooling, characterized in that, Including: A base (1), the base (1) is cast on the ground with cement; A dry-type transformer (2), the dry-type transformer (2) is fixedly installed on the top of the base (1); A support plate (3), the support plate (3) is fixedly installed on the top of the dry-type transformer (2); A heat pipe radiator (4), the heat pipe radiator (4) is fixedly penetrated through the top of the support plate (3), and the bottom of the heat pipe radiator (4) is in contact with the top of the dry-type transformer (2); A mounting rack (5), the mounting rack (5) is fixedly installed on the top of the support plate (3), and docking grooves are formed on the surface of the mounting rack (5); An axial flow fan (6), the axial flow fan (6) is slidably installed on the inner wall of the mounting rack (5); A plug (7), the plug (7) is arranged on the surface of the axial flow fan (6), and the plug (7) is electrically connected to the axial flow fan (6); A grip rod (8), the grip rod (8) is fixedly installed on the side of the axial flow fan (6) away from the plug (7); A power supply device (9), the power supply device (9) is fixedly installed on the top of the support plate (3), a socket is arranged on the side of the power supply device (9) close to the plug (7), and the power supply device (9) outputs power through the socket; A push rod (10) is fixedly installed on the side of the axial flow fan (6) close to the plug (7), a protection plate (11) is rotatably installed on the surface of the mounting rack (5), and the side of the push rod (10) close to the protection plate (11) is formed into a spherical surface; Among them, a self-locking device is arranged on the mounting rack (5); Through holes are formed on the surface of the mounting rack (5), the through holes are adapted to the size of the push rod (10), and rectangular grooves are formed on the circumferential surface of the push rod (10); The self-locking device includes a hollow frame (121), a telescopic rod (122), a first spring (123) and a limiting block (124), the hollow frame (121) is fixedly installed on the surface of the mounting rack (5), the telescopic rod (122) slidably penetrates through the top of the hollow frame (121), the first spring (123) is arranged between the telescopic rod (122) and the hollow frame (121), the limiting block (124) is fixedly installed on the top of the telescopic rod (122), and an inclined surface is formed on the top of the limiting block (124); A collar (125) is rotatably installed on the circumferential surface of the telescopic rod (122), a pull rod (126) is fixedly installed on the circumferential surface of the collar (125), an arc-shaped block (127) is fixedly installed on the circumferential surface of the collar (125), a rectangular plate (128) is fixedly installed on the top of the hollow frame (121), a linkage plate (129) is fixedly installed on the circumferential surface of the telescopic rod (122), long grooves and short grooves are formed on the rectangular plate (128), and the arc-shaped block (127) is in contact with the inner wall of the long groove; A torsion spring is arranged between the collar (125) and the telescopic rod (122), a sliding groove is formed on the surface of the hollow frame (121), and the linkage plate (129) is in contact with the inner wall of the sliding groove.

2. The dry-type transformer with heat pipe cooling according to claim 1, characterized in that: An auxiliary device is provided on the carrying frame (5). The auxiliary device includes a connecting frame (131), a sliding rod (132), an L-shaped plate (133), a flat plate (134), a second spring (135) and a rubber sheet (136). The connecting frame (131) is fixedly installed on the surface of the carrying frame (5). The sliding rod (132) slidably penetrates through the surface of the connecting frame (131). The L-shaped plate (133) is fixedly installed on the top of the sliding rod (132). The flat plate (134) is fixedly installed on the bottom of the sliding rod (132). The second spring (135) is arranged between the flat plate (134) and the connecting frame (131). The rubber sheet (136) is fixedly installed on the top of the flat plate (134).

3. A heat pipe cooled dry-type transformer according to claim 2, characterized in that: A circular block (137) is fixedly installed on one side of the L-shaped plate (133) close to the sliding groove. A circular rod (138) fixedly penetrates through the surface of the flat plate (134). The circular block (137) contacts the inner wall of the sliding groove. A guiding groove is formed on one side of the connecting frame (131) close to the circular rod (138). The circular rod (138) contacts the inner wall of the guiding groove.

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