A dry type transformer

Abstract

The present invention discloses a dry-type transformer, which relates to the technical field of dry-type transformers, including an iron core, a high-voltage coil and a low-voltage coil, and also includes a base, a limit assembly and a guide assembly. A lower clamp for clamping the bottom of the iron core is fixedly connected to the top of the base, and the end of the iron core away from the base is fixedly connected by an upper clamp. The limit assemblies are respectively arranged on the top of the lower clamp and the bottom of the upper clamp. A plurality of support members are used to support and limit the high-voltage coil and the low-voltage coil. The guide assembly is arranged in the limit assembly, and the low-voltage coil can be further guided and limited by a plurality of guide members. The present invention linearly contacts the inner ring of the low-voltage coil through a plurality of guide members, so that the low-voltage coil is limited by a plurality of guide members, so that the low-voltage coil and the high-voltage coil tend to be concentric, thereby preventing the transformer from generating unbalanced electromagnetic force during operation, resulting in the problem of aggravated transformer vibration and damage to the transformer.

Description

Technical Field

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

[0002] Dry-type transformers have the advantages of strong short-circuit resistance, low maintenance workload, high operating efficiency, small size and low noise. They are often used in places with high requirements for fire prevention, explosion-proof and other performance. Dry-type transformers are mainly composed of iron core, winding, insulation material, casing and other parts. The windings are divided into low-voltage windings and high-voltage windings, and the windings are cast with epoxy resin.

[0003] A Chinese patent with application number 202410149255.8 discloses a dry-type transformer, including a base, three groups of central iron blocks are arranged on the top of the base, and coil windings are wrapped on the outside of the central iron blocks. The coil windings are composed of low-voltage coils and high-voltage coils that are sleeved with each other, and the high-voltage coils are sleeved on the outside of the low-voltage coils with a certain interval. An upper fixing seat is connected between the tops of the three coil windings, and three high-voltage terminals electrically connected to the coil windings are fixed to the front end of the upper fixing seat. By arranging four fanless fan outlet covers on the outside of the dry-type transformer, airflow is blown toward the three central coil windings in four directions, which can effectively cool the entire dry-type transformer and reduce the operating temperature. A temperature measuring module is arranged on the outside of the coil winding, and the temperature measuring module is connected to the bottom fan for changing the heat dissipation wind speed at different temperatures of the coil windings, thereby improving the safety of the dry-type transformer during high-load transportation.

[0004] Although the invention can effectively cool the entire dry-type transformer by setting up four fanless blower hoods to blow air in four directions toward the three central coil windings, there is still a problem that when the low-voltage coil and the high-voltage coil that are phase-connected are assembled, if the low-voltage coil is deviated from the iron core during assembly or the low-voltage coil is not concentric with the high-voltage coil in the high-voltage coil, the non-concentricity of the high-voltage coil will cause poor local heat dissipation of the coil during operation of the transformer, increase the temperature of the transformer, and generate unbalanced electromagnetic force, which will cause the transformer to vibrate more, and may cause damage to the structure of the transformer.

[0005] Therefore, the present invention proposes a dry-type transformer to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a dry-type transformer, which solves the technical problems raised in the above-mentioned background technology through a limiting component and a guiding component.

[0007] To achieve the above object, the present invention provides the following technical solution: a dry-type transformer, comprising an iron core, a high-voltage coil and a low-voltage coil, and further comprising: a base, the top of the base being fixedly connected with a lower clamp for clamping the bottom of the iron core, and the end of the iron core away from the base being fixedly connected via an upper clamp;

[0008] A limit assembly, wherein the limit assembly is respectively arranged at the top of the lower clamp and the bottom of the upper clamp, and the limit assembly includes a plurality of support members uniformly fixed on the top of the lower clamp, and the plurality of support members are used to support and limit the high-voltage coil and the low-voltage coil; two placement grooves are provided in each of the support members, and a limit member is rotated in each of the placement grooves by a rotating rod, and each of the limit members is provided with a guide groove, and a limit groove for placing a first gas cylinder is provided in each of the placement grooves, and a first piston is slidably connected in each of the first gas cylinders, and one end of each of the first pistons close to the limit member is fixedly connected to a first piston rod, and the outer wall of one end of each of the first piston rods extending out of the first gas cylinder is slidably connected to the guide groove, and one end of each of the first piston rods extending out of the guide groove is fixedly connected to a pressure-bearing member;

[0009] The guide assembly is arranged in the limiting assembly, and the guide assembly includes a plurality of guide members, through which the low-voltage coil can be further guided and limited.

[0010] Preferably, the top of each of the pressure-bearing parts is movably connected to the bottom of the high-voltage coil, a first elastic part is provided in each of the first air cylinders, one end of each of the first elastic parts is connected to an end of the first piston away from the first piston rod, the other end of each of the first elastic parts is connected to the inner bottom wall of the first air cylinder, a first air outlet is provided on the outer wall of an end of each of the first air cylinders away from the first piston rod, and every two of the limiting parts are fixedly connected by a fixing rod.

[0011] Preferably, each of the supporting members is provided with a notch, a transfer shaft is disposed in each of the notches, and the outer wall of each of the transfer shafts is rotatably connected to a second air cylinder.

[0012] Preferably, each second air cylinder is slidably connected with a second piston, and each second piston is fixedly connected to a second piston rod at one end away from the adapter shaft, and each second piston rod is rotatably connected to an outer wall of the fixed rod at one end extending out of the second air cylinder, and a second elastic member is sleeved on the outer wall of each second piston rod, and one end of each second elastic member is connected to an end of the second piston close to the second piston rod, and the other end of each second elastic member is connected to the inner wall of one end of the second air cylinder away from the adapter shaft.

[0013] Preferably, each of the second air cylinders has a first air inlet hole on its side wall near the adapter shaft, each of the first air inlet holes is connected to two adjacent first air outlet holes through a tee and a pipe, and each of the second air cylinders has a second air outlet hole on its side wall away from the adapter shaft.

[0014] Preferably, the guide assembly includes a plurality of third gas cylinders arranged in the support member, each of the third gas cylinders is slidably connected to a third piston, one end of each of the third pistons is fixedly connected to a third piston rod, the outer wall of each of the third piston rods is sleeved with a third elastic member, one end of each of the third elastic members is connected to an end of the third piston close to the third piston rod, and the other end of each of the third elastic members is connected to the corresponding inner wall of the third gas cylinder.

[0015] Preferably, a second air inlet hole is formed on a side wall of one end of the third air cylinder away from the third piston rod, the second air inlet hole is connected to the second air outlet hole through a pipeline, and one end of the third piston rod extending out of the third air cylinder is fixedly connected to the guide member.

[0016] Preferably, the guide member includes a cylinder and a cone.

[0017] Preferably, the outer wall of one end of each guide member extending out of the support member is movably connected to the inner circle side wall of the low-voltage coil.

[0018] Preferably, the low-voltage coil and the high-voltage coil are respectively sleeved on the iron core, and the high-voltage coil and the low-voltage coil are movably connected to the corresponding support members, and the support members are provided with sliding grooves for sliding of the fixing rods.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention allows the pressure-bearing part to move downward while the limiting part continuously rotates in the placement groove and approaches the high-voltage coil. As the high-voltage coil moves downward, the limiting part rotates and continuously squeezes the high-voltage coil. The plurality of limiting parts contact the high-voltage coil and squeeze the high-voltage coil synchronously to prevent the inner circle of the high-voltage coil from deviating from the proper distance from the iron core, which causes the inner circle of the high-voltage coil to be too close to the iron core and affects the installation of the low-voltage coil later. At the same time, the squeezing and support of the plurality of limiting parts prevent the high-voltage coil from shaking while falling, which causes the problem of scratching the iron core and damaging the insulation of the high-voltage coil. The compression of the first elastic part while the high-voltage coil falls cushions the fall of the high-voltage coil, thereby ensuring that the high-voltage coil can fall smoothly on the plurality of supporting parts, thereby preventing the high-voltage coil from colliding with the supporting parts and damaging the high-voltage coil during installation.

[0021] 2. The present invention connects the first air inlet holes opened by the multiple second air cylinders, so that the pressure of the limiting member on the outer ring of the high-voltage coil can be further equalized through the fixing rod, thereby preventing the high-voltage coil from being damaged due to the local large force on the outer ring of the high-voltage coil when it is squeezed and fixed by the multiple limiting members; the second piston moves to drive the second piston rod to move while continuously squeezing the second elastic member, thereby preventing the high-voltage coil from being damaged due to the limiting member rotating rapidly when the high-voltage coil falls too fast and knocking on the high-voltage coil under the action of inertia.

[0022] 3. The present invention drives the third piston rod to move while the third piston moves. The movement of the third piston rod drives the guide member to move over the support member, so that when the low-voltage coil is assembled in the high-voltage coil, the low-voltage coil is initially guided by the mutual cooperation of multiple guide members. As the low-voltage coil falls, it gradually contacts the support member, and the multiple guide members linearly contact the inner circle of the low-voltage coil, so that the low-voltage coil is limited by the multiple guide members, so that the low-voltage coil and the high-voltage coil tend to be concentric, thereby preventing the transformer from generating unbalanced electromagnetic force during operation, causing the transformer to vibrate more and damage the transformer, and also preventing the problem of the transformer temperature rising due to poor local heat dissipation between the low-voltage coil and the high-voltage coil. At the same time, through the mutual cooperation of multiple guide members, the low-voltage coil does not need to be excessively adjusted during assembly, thereby preventing the problem of repeated adjustment due to the obstruction of the line of sight of the high-voltage coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the iron core structure of the present invention.

[0025] Figure 3 It is a partial cutaway schematic diagram of the support member of the present invention.

[0026] Figure 4 It is a schematic diagram of the installation structure of the low-voltage coil and the guide member of the present invention.

[0027] Figure 5 It is a schematic diagram of the high voltage coil structure of the present invention.

[0028] Figure 6 This is an exploded view of the support member of the present invention.

[0029] Figure 7 It is an exploded view of the limiting member of the present invention.

[0030] Figure 8 It is a stepped cross-sectional view of the support member of the present invention at the first gas cylinder and the second gas cylinder.

[0031] Fig. 9 This is a cross-sectional view of the support member of the present invention at the second air cylinder.

[0032] The accompanying drawings are marked as follows: 1. base; 2. lower clamp; 21. upper clamp; 3. iron core; 4. limiting assembly; 41. supporting member; 411. placement groove; 412. notch; 413. adapter shaft; 42. limiting member; 421. guide groove; 43. first air cylinder; 431. first piston; 432. first piston rod; 433. pressure-bearing member; 434. first elastic member; 435. first air outlet; 44. fixing rod; 45. second air cylinder; 451. second piston; 452. second piston rod; 453. second elastic member; 454. first air inlet; 455. second air outlet; 5. high-voltage coil; 6. low-voltage coil; 7. guide assembly; 71. third air cylinder; 711. third piston; 712. third piston rod; 713. third elastic member; 714. second air inlet; 715. guide member. DETAILED DESCRIPTION

[0033] 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] In the actual production process, since the high-voltage coil needs to be hoisted by a hoisting tool, the high-voltage coil is slowly placed on the iron core through the controller and finally placed on four pads. When the high-voltage coil is evenly placed on the pads, it is necessary to make repeated adjustments to ensure that the high-voltage coil is evenly pressed on the pads while also ensuring that the inner circle of the high-voltage coil is at a moderate distance from the iron core. If one side of the high-voltage coil is too close to the iron core, it will affect the installation of the low-voltage coil. In severe cases, it will cause the iron core to damage the insulation of the high-voltage coil. This embodiment is specially invented to solve the above problem.

[0035] See also Figure 1 , Figure 2 , Figure 3 and Figure 5A dry-type transformer according to an embodiment of the present invention comprises an iron core 3, a high-voltage coil 5 and a low-voltage coil 6, and also comprises a base 1, a limiting assembly 4 and a guiding assembly 7. A lower clamp 2 for clamping the bottom of the iron core 3 is fixedly connected to the top of the base 1, and the end of the iron core 3 away from the base 1 is fixedly connected by an upper clamp 21. The limiting assembly 4 is respectively arranged on the top of the lower clamp 2 and the bottom of the upper clamp 21. The limiting assembly 4 comprises a plurality of supporting members 41 uniformly fixed on the top of the lower clamp 2, and the plurality of supporting members 41 are used to support and limit the high-voltage coil 5 and the low-voltage coil 6. The guiding assembly 7 is arranged in the limiting assembly 4, and the guiding assembly 7 comprises a plurality of guiding members 715, and the plurality of guiding members 715 can further guide and limit the low-voltage coil 6.

[0036] See also Figure 3 Each support member 41 has two placement slots 411, and each placement slot 411 is provided with a limit member 42 which is rotated by a rotating rod. Figure 7 Each limiting member 42 is provided with a guide groove 421, and each placement groove 411 is provided with a limiting groove for placing the first gas cylinder 43. Figure 7 and Figure 8 , each first air cylinder 43 is slidably connected with a first piston 431, and one end of each first piston 431 close to the limiter 42 is fixedly connected with a first piston rod 432, and the outer wall of one end of each first piston rod 432 extending out of the first air cylinder 43 is slidably connected with the guide groove 421, and one end of each first piston rod 432 extending out of the guide groove 421 is fixedly connected with a pressure-bearing member 433, and the top of each pressure-bearing member 433 is movably connected with the bottom of the high-voltage coil 5, and each first air cylinder 43 is provided with a first elastic member 434, wherein the first elastic member 434 is a spring, and each One end of the first elastic member 434 is connected to one end of the first piston 431 away from the first piston rod 432, and the other end of each first elastic member 434 is connected to the inner bottom wall of the first air cylinder 43. The outer wall of one end of each first air cylinder 43 away from the first piston rod 432 is provided with a first air outlet 435. Every two limit members 42 are fixedly connected by a fixing rod 44. The low-voltage coil 6 and the high-voltage coil 5 are respectively mounted on the iron core 3. The high-voltage coil 5 and the low-voltage coil 6 are movably connected to the corresponding support member 41. The support member 41 is provided with a sliding groove for the sliding of the fixing rod 44.

[0037] During assembly, the high-voltage coil 5 is hoisted to the top of the iron core 3 by a hoisting tool, and then the high-voltage coil 5 is sleeved on the iron core 3 by a controller. Under the action of the hoisting tool, the high-voltage coil 5 continuously approaches the lower clamp 2 and the four evenly distributed support members 41, and the high-voltage coil 5 continuously approaches the support member 41 at any time. When the bottom of the high-voltage coil 5 contacts the pressure-bearing member 433 and continuously squeezes the pressure-bearing member 433, the pressure-bearing member 433 moves downward, and the pressure-bearing member 433 moves downward while driving the first piston rod 432 to move. The first piston rod 432 moves while driving the first piston 431 to move in the first air cylinder 43. The first piston 431 moves while continuously squeezing the first elastic member 434. The pressure-bearing member 433 moves while continuously squeezing the limit member 42. The limit member 42 is compressed while rotating in the placement groove 411 through the rotating rod. As the pressure-bearing member 433 is pressed downward, the limit member 42 rotates in the placement groove 411 while continuously approaching the high-voltage coil 5 and continuously squeezing the high-voltage coil 5.

[0038] To summarize, by moving the pressure-bearing member 433 downward, the limiting member 42 is continuously rotated in the placement groove 411 and approaches the high-voltage coil 5. As the high-voltage coil 5 moves downward, the limiting member 42 is continuously squeezed while rotating. Multiple limiting members 42 are in contact with the high-voltage coil 5 and squeeze the high-voltage coil 5 synchronously to prevent the inner circle of the high-voltage coil 5 from deviating from the proper distance from the iron core 3, causing the inner circle of the high-voltage coil 5 to be too close to the iron core 3 and affecting the installation of the low-voltage coil 6 later. At the same time, through the squeezing and support of multiple limiting members 42, the high-voltage coil 5 is prevented from shaking while falling, causing the problem of scratching the iron core 3 and damaging the insulation of the high-voltage coil 5. When the high-voltage coil 5 falls, the compression of the first elastic member 434 cushions the fall of the high-voltage coil 5, thereby ensuring that the high-voltage coil 5 can fall smoothly on multiple support members 41, preventing the high-voltage coil 5 from colliding with the support members 41 and damaging the high-voltage coil 5 during installation.

[0039] It is found that when using the above-mentioned embodiment, although the inner circle of the high-voltage coil 5 can be positioned at a moderate distance from the iron core 3 through multiple limit members 42, there is still a problem that when the low-voltage coil 6 is placed inside the high-voltage coil 5, if the operation is improper, when the low-voltage coil 6 contacts the high-voltage coil 5, the high-voltage coil 5 will become loose and misaligned on the support member 41, and the high-voltage coil 5 will also become loose during the subsequent transportation process. This embodiment is specially invented to solve the above-mentioned problems.

[0040] See also Figure 4 , Figure 6 and Fig. 9Each support member 41 is provided with a notch 412, and a transfer shaft 413 is provided in each notch 412. The outer wall of each transfer shaft 413 is rotatably connected to a second gas cylinder 45, and a second piston 451 is slidably connected in each second gas cylinder 45. The end of each second piston 451 away from the transfer shaft 413 is fixedly connected to a second piston rod 452, and the end of each second piston rod 452 extending out of the second gas cylinder 45 is rotatably connected to the outer wall of the fixed rod 44, and the outer wall of each second piston rod 452 is sleeved with a second elastic member 453, wherein the second elastic member 453 is a spring, one end of each second elastic member 453 is connected to one end of the second piston 451 close to the second piston rod 452, the other end of each second elastic member 453 is connected to the inner wall of one end of the second air cylinder 45 away from the adapter shaft 413, and a first air inlet hole 454 is opened on the side wall of one end of each second air cylinder 45 close to the adapter shaft 413, each first air inlet hole 454 is connected to two adjacent first air outlet holes 435 through a tee piece and a pipeline, and a second air outlet hole 455 is opened on the side wall of one end of each second air cylinder 45 away from the adapter shaft 413.

[0041] On the basis of the above embodiment, the first piston 431 continuously compresses the air at the first air outlet 435 in the first air cylinder 43 while moving downward in the first air cylinder 43, and the compressed gas enters the first air inlet 454 through the first air outlet 435 and the pipeline, and the compressed gas enters the inner cavity of the second air cylinder 45 through the first air inlet 454, and the compressed gas squeezes the second piston 451. The second piston 451 continuously squeezes the second elastic member 453 while moving. At the same time, the second piston 451 drives the second piston rod 452 to move, and the second piston rod 452 moves while driving the fixed rod 44 to move. The fixed rod 44 moves while driving the limiting member 42 to further squeeze and limit the outer ring of the high-voltage coil 5.

[0042] To summarize, the first air inlet holes 454 opened by the multiple second air cylinders 45 are interconnected, so that the pressure exerted by the limiting member 42 on the outer ring of the high-voltage coil 5 can be further equalized through the fixing rod 44, thereby preventing the high-voltage coil 5 from being damaged due to the local large force on the outer ring of the high-voltage coil 5 when it is squeezed and fixed by the multiple limiting members 42; the second piston 451 moves to drive the second piston rod 452 to move while continuously squeezing the second elastic member 453, thereby preventing the high-voltage coil 5 from being damaged due to the limiting member 42 rotating rapidly when the high-voltage coil 5 falls too fast, and preventing the high-voltage coil 5 from being damaged due to the knocking on the high-voltage coil 5 by inertia.

[0043] When using the above embodiment, it is found that since the operator's line of sight will be blocked by the installed high-voltage coil 5 when assembling the low-voltage coil 6, the operator cannot observe that the low-voltage coil 6 is located at the position where the high-voltage coil 5 and the iron core 3 are located, it is easy to cause the low-voltage coil 6 to scratch the bottom and the iron core 3 during assembly, resulting in the low-voltage coil 6 and the high-voltage coil 5 being out of center, causing damage to the transformer and excessive local temperature of the high-voltage coil 5 and the low-voltage coil 6. This embodiment is specially invented to solve the above problems.

[0044] See also Figure 3 , Figure 7 and Figure 8 The guide assembly 7 includes a plurality of third gas cylinders 71 disposed in the support member 41, each of which is slidably connected to a third piston 711, one end of each of which is fixedly connected to a third piston rod 712, and an outer wall of each of which is sleeved with a third elastic member 713, wherein the third elastic member 713 is a spring, one end of each of which is connected to an end of the third piston 711 close to the third piston rod 712, and each of which is sleeved with a third elastic member 713. The other end is connected to the corresponding inner wall of the third air cylinder 71, and a second air inlet hole 714 is provided on the side wall of the third air cylinder 71 away from the third piston rod 712. The second air inlet hole 714 is communicated with the second air outlet hole 455 through a pipeline. The end of the third piston rod 712 extending out of the third air cylinder 71 is fixedly connected to the guide member 715, and the guide member 715 includes a cylinder and a cone. The outer wall of one end of each guide member 715 extending out of the support member 41 is movably connected to the inner ring side wall of the low-voltage coil 6.

[0045] On the basis of the above embodiment, the second piston 451 squeezes the second elastic member 453, and at the same time, the gas at the second air outlet 455 in the second air cylinder 45 is compressed, and the compressed gas enters the corresponding two second air inlet holes 714 through the three-way pipe and pipeline of the second air outlet 455, and the compressed gas enters the third air cylinder 71 through the second air inlet holes 714. The compressed gas in the third air cylinder 71 squeezes the third piston 711, and the third piston 711 continuously squeezes the third elastic member 713 while moving, and at the same time, the third piston 711 drives the third piston rod 712 to move, and the third As the piston rod 712 moves, it drives the guide member 715 to move inside the support member 41. When the third elastic member 713 is compressed to the maximum limit position, the third piston rod 712 drives the guide member 715 to fully extend out of the support member 41, so that when the low-voltage coil 6 is installed, the low-voltage coil 6 is guided by the inner circle of the low-voltage coil 6 under the action of multiple guide member 715 cones. As the low-voltage coil 6 continues to approach the support member 41, as the low-voltage coil 6 falls and contacts the guide member 715 cylinder, multiple guide member 715 cylinders contact the inner circle of the low-voltage coil 6 and limit the position.

[0046] In summary, the movement of the third piston 711 drives the movement of the third piston rod 712, and the movement of the third piston rod 712 drives the guide member 715 to move past the support member 41, so that when the low-voltage coil 6 is assembled in the high-voltage coil 5, the low-voltage coil 6 is initially guided by the mutual cooperation of multiple guide members 715, and as the low-voltage coil 6 falls, it gradually contacts the support member 41, and contacts the inner circle of the low-voltage coil 6 through multiple guide members 715, so that the low-voltage coil 6 is limited by multiple guide members 715, and the low-voltage coil 6 and the high-voltage coil 5 tend to be concentric, so as to prevent the transformer from generating unbalanced electromagnetic force during operation, resulting in the problem of aggravated transformer vibration and damage to the transformer, and also prevent the problem of the transformer temperature rising due to poor local heat dissipation between the low-voltage coil 6 and the high-voltage coil 5; at the same time, through the mutual cooperation of multiple guide members 715, the low-voltage coil 6 does not need to be excessively adjusted during assembly, so as to prevent the problem of repeated adjustment due to the obstruction of the line of sight of the high-voltage coil 5, thereby improving the installation quality and efficiency.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry-type transformer, comprising an iron core (3), a high-voltage coil (5) and a low-voltage coil (6), characterized in that: Also includes: A base (1), wherein a lower clamp (2) for clamping the bottom of the iron core (3) is fixedly connected to the top of the base (1), and an end of the iron core (3) away from the base (1) is fixedly connected via an upper clamp (21); A limit assembly (4), the limit assembly (4) being arranged at the top of the lower clamp (2) and the bottom of the upper clamp (21), the limit assembly (4) comprising a plurality of support members (41) uniformly fixed on the top of the lower clamp (2), and the plurality of support members (41) being used to support and limit the high-voltage coil (5) and the low-voltage coil (6); each of the support members (41) having two placement grooves (411), each of the placement grooves (411) having a limit member (42) rotated by a rotating rod, and each of the limit members (42) having a guide groove (421) ), each of the placement grooves (411) is provided with a limiting groove for placing the first gas cylinder (43), each of the first gas cylinders (43) is slidably connected to a first piston (431), one end of each of the first pistons (431) close to the limiting member (42) is fixedly connected to a first piston rod (432), an outer wall of one end of each of the first piston rods (432) extending out of the first gas cylinder (43) is slidably connected to the guide groove (421), and one end of each of the first piston rods (432) extending out of the guide groove (421) is fixedly connected to a pressure-bearing member (433); The top of each of the pressure-bearing parts (433) is movably connected to the bottom of the high-voltage coil (5), a first elastic part (434) is provided in each of the first air cylinders (43), one end of each of the first elastic parts (434) is connected to an end of the first piston (431) away from the first piston rod (432), the other end of each of the first elastic parts (434) is connected to the inner bottom wall of the first air cylinder (43), the outer wall of an end of each of the first air cylinders (43) away from the first piston rod (432) is provided with a first air outlet (435), and each two of the limiting parts (42) are fixedly connected via a fixing rod (44); A guide assembly (7), the guide assembly (7) being arranged in the limiting assembly (4), the guide assembly (7) comprising a plurality of guide members (715), and the low-voltage coil (6) can be further guided and limited by the plurality of guide members (715); The outer wall of one end of each guide member (715) extending out of the support member (41) is movably connected to the inner ring side wall of the low-voltage coil (6).

2. A dry-type transformer according to claim 1, characterized in that: Each of the support members (41) is provided with a notch (412), a transfer shaft (413) is arranged in each of the notches (412), and the outer wall of each of the transfer shafts (413) is rotatably connected to a second air cylinder (45).

3. A dry-type transformer according to claim 2, characterized in that: A second piston (451) is slidably connected inside each second gas cylinder (45), and one end of each second piston (451) away from the adapter shaft (413) is fixedly connected to a second piston rod (452), and one end of each second piston rod (452) extending out of the second gas cylinder (45) is rotatably connected to the outer wall of the fixed rod (44), and the outer wall of each second piston rod (452) is sleeved with a second elastic member (453), one end of each second elastic member (453) is connected to one end of the second piston (451) close to the second piston rod (452), and the other end of each second elastic member (453) is connected to the inner wall of one end of the second gas cylinder (45) away from the adapter shaft (413).

4. A dry-type transformer according to claim 3, characterized in that: A first air inlet hole (454) is provided on a side wall at one end of each second air cylinder (45) close to the adapter shaft (413); each first air inlet hole (454) is connected to two adjacent first air outlet holes (435) via a tee piece and a pipe; and a second air outlet hole (455) is provided on a side wall at one end of each second air cylinder (45) away from the adapter shaft (413).

5. A dry-type transformer according to claim 1, characterized in that: The guide assembly (7) comprises a plurality of third gas cylinders (71) arranged in a support member (41), each of the third gas cylinders (71) being slidably connected to a third piston (711), one end of each of the third pistons (711) being fixedly connected to a third piston rod (712), an outer wall of each of the third piston rods (712) being sleeved with a third elastic member (713), one end of each of the third elastic members (713) being connected to an end of the third piston (711) close to the third piston rod (712), and the other end of each of the third elastic members (713) being connected to the inner wall of the corresponding third gas cylinder (71).

6. A dry-type transformer according to claim 5, characterized in that: A second air inlet hole (714) is formed on a side wall of one end of the third air cylinder (71) away from the third piston rod (712); the second air inlet hole (714) is connected to the second air outlet hole (455) via a pipeline; and one end of the third piston rod (712) extending out of the third air cylinder (71) is fixedly connected to the guide member (715).

7. A dry-type transformer according to claim 6, characterized in that: The guide member (715) comprises a cylinder and a cone.

8. A dry-type transformer according to claim 1, characterized in that: The low-voltage coil (6) and the high-voltage coil (5) are respectively sleeved on the iron core (3); the high-voltage coil (5) and the low-voltage coil (6) are both movably connected to corresponding support members (41); and the support member (41) is provided with a slide groove for sliding the fixing rod (44).

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