A dry-type transformer

Abstract

This invention discloses a dry-type transformer, belonging to the field of power equipment technology. It includes: a main frame, with three coil assemblies sleeved on the outer side of the main frame. A pad is provided on the top of each coil assembly, and a first temperature sensor is provided at the bottom of the pad. A heat dissipation mechanism is provided on the rear side of the main frame. The heat dissipation mechanism includes: a mounting frame, a support plate, and three sets of heat dissipation components. Each heat dissipation component includes: an oil-cooling pipe, a connecting pipe, a mounting cylinder, fan blades, and a drive motor. This invention increases the airflow speed around the coil assemblies by rotating the fan blades of the drive motor in the heat dissipation mechanism. Simultaneously, an oil pump guides cooling oil into the oil-cooling pipe to remove heat. The cooling oil is further cooled by the fan blades in the connecting pipe, achieving efficient heat dissipation and oil resource recycling. The controller, combined with the first temperature sensor to monitor the coil assembly temperature and the second temperature sensor to monitor the main frame temperature, dynamically adjusts the power of the drive motor and the oil pump.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more particularly to a dry-type transformer. Background Technology

[0002] Dry-type transformers are prone to overheating due to insufficient heat dissipation efficiency during long-term operation, affecting equipment stability and lifespan. Existing technologies generally employ a single air-cooling mechanism, which has limited airflow coverage and makes it difficult to uniformly reduce the temperature of coil components, resulting in limited overall heat dissipation capacity and inability to meet the requirements of high-load environments.

[0003] On the other hand, dry-type transformers mostly use fixed installation for their structural connections, lacking adjustable locking functions between the connecting plates and the base, making disassembly and maintenance difficult and time-consuming. Existing support structures are prone to loosening under mechanical vibration, yet lack built-in detection devices to warn of potential faults, increasing the risk of equipment malfunction; in some designs, connecting parts rely solely on simple bolt fixation, which is prone to displacement during vibration, causing structural wear. There is an urgent need for improvements to achieve rapid disassembly and automatic maintenance monitoring functions; therefore, we propose a dry-type transformer to solve this problem. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dry-type transformer includes: a main frame, three coil assemblies sleeved on the outer side of the main frame, a pad on the top of each coil assembly, a first temperature sensor on the bottom of each pad, a heat dissipation mechanism on the rear side of the main frame, the heat dissipation mechanism including: a mounting frame, a support plate, and three sets of heat dissipation components, each heat dissipation component including: an oil cooling pipe, a connecting pipe, a mounting cylinder, a fan blade, and a drive motor, lower clamps fixedly installed on the bottom of both the front and rear sides of the main frame, a support frame fixedly installed on the bottom of each lower clamp, a base on the bottom of the support frame, and a connecting component between the base and the support frame.

[0007] Preferably, a crossbeam is fixedly installed inside the mounting cylinder, the drive motor is fixedly installed on the rear side of the crossbeam, the fan blade is fixedly installed on the output shaft of the drive motor, the connecting pipe is fixedly installed inside the mounting cylinder, the oil cooling pipe is sleeved on the outside of the coil assembly, one end of the oil cooling pipe is connected to the connecting pipe, an oil pump is provided at the top of the mounting cylinder, and the other end of the oil cooling pipe is connected to the oil outlet of the oil pump.

[0008] Preferably, the top of the main frame is provided with a controller, a signal transmitter, and a second temperature sensor, and the controller is connected to the signal transmitter, the second temperature sensor, the first temperature sensor, the oil pump, and the drive motor.

[0009] Preferably, the connecting assembly includes: a connecting plate, a locking disc, a connecting post, an eccentric wheel, a buffer pad, and a touch button. The buffer pad is fixedly installed on the top of the connecting plate, and the top of the buffer pad is fixedly installed inside the support frame. The bottom of the connecting plate has a groove, and the inner walls of both sides of the groove have arc-shaped grooves. The left and right sides of the locking disc are respectively movably engaged in the corresponding arc-shaped grooves. The front and rear sides of the locking disc have notch grooves. The top of the connecting post is fixedly connected to the locking disc, and the bottom of the connecting post is fixedly connected to the eccentric wheel. A connecting spring is provided on the outer side of the connecting post, and the top of the connecting spring is connected to the inside of the base. The touch button is located on one side of the eccentric wheel, and a mounting post is fixedly installed on the other side of the touch button. The other end of the mounting post is fixedly installed on the side wall of the base. A positioning pin is fixedly installed on the top of the base, and the positioning pin is movably inserted into the inside of the connecting plate.

[0010] Preferably, a shorting wire is connected to the top of the coil assembly, upper clamps are fixedly installed on the top of both the front and rear sides of the main frame, a low-voltage connector is fixedly installed on one side of the upper clamp, an insulator is connected to the other end of the low-voltage connector, the other end of the shorting wire is connected to the other end of the insulator, a connecting wire is connected between two adjacent coil assemblies, and a long wire is connected between the coil assemblies located on the left and right sides.

[0011] Preferably, the connecting column is rotatably installed inside the base, and a stepped surface is provided on the outer side of the connecting column, which movably abuts against the top inner wall of the base.

[0012] Preferably, the main frame includes two yoke posts and three winding posts, with each end of the winding post fixedly connected to the corresponding yoke post. The coil assembly includes a high-voltage coil, a low-voltage coil, and an insulating cylinder. The insulating cylinder is disposed between the high-voltage coil and the low-voltage coil. The low-voltage coil is wound around the outside of the corresponding winding post. The mounting cylinder is fixedly installed on the top of the mounting frame, and the support plate is fixedly installed on the bottom of the mounting frame. The bottom of the support plate is fixedly connected to the support frame.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. In this invention, a dry-type transformer is driven by starting a drive motor to rotate the fan blades, thereby increasing the airflow speed around the coil assembly and thus improving the heat dissipation efficiency. By starting an oil pump, external cooling oil is introduced into the cooling pipe. When the cooling oil flows through the cooling pipe, it carries away the heat on the coil assembly. Then, the cooling oil flows through the connecting pipe, and the wind force generated by the fan blade rotation accelerates the cooling of the cooling oil in the connecting pipe, thereby facilitating the recycling of the cooling oil.

[0015] 2. In this invention, a dry-type transformer monitors the temperature of the coil assembly through a first temperature sensor and the temperature of the main frame through a second temperature sensor. The monitoring signals are transmitted to the controller, which controls the power of the drive motor and oil pump according to the temperature, thereby adjusting the appropriate cooling power to meet the usage requirements of different working conditions and environments.

[0016] 3. In this invention, a dry-type transformer locks the connecting plate by cooperating with a locking disc and an arc-shaped groove. By manually rotating the eccentric wheel, the connecting column and the locking disc are rotated, so that the notch of the locking disc aligns with the arc-shaped groove, thereby releasing the locking disc from locking the connecting plate for easy disassembly and maintenance. When disassembly is not required, or when the eccentric wheel rotates due to external vibration, the eccentric wheel can contact the touch button to control the signal transmitter to send a signal for maintenance personnel.

[0017] 4. In this invention, a dry-type transformer utilizes a drive motor in the heat dissipation mechanism to rotate fan blades, increasing the airflow speed around the coil assembly. Simultaneously, an oil pump guides cooling oil into the oil-cooling pipes to remove heat. The cooling oil is further cooled by the airflow generated by the fan blades in the connecting pipes, achieving efficient heat dissipation and oil resource recycling. The controller, combined with a first temperature sensor to monitor the coil assembly temperature and a second temperature sensor to monitor the main frame temperature, dynamically adjusts the power of the drive motor and oil pump to adapt to different operating conditions and environmental requirements, optimizing energy efficiency. The connecting assembly uses a locking disc and an arc-shaped groove for stable locking. Manually rotating the eccentric wheel drives the connecting column to move, aligning the notch of the locking disc with the arc-shaped groove to unlock, facilitating equipment disassembly and maintenance. In the event of accidental vibration causing the eccentric wheel to rotate, it contacts a touch button, triggering a signal transmitter to issue an alarm to notify maintenance personnel, ensuring equipment safety and timely maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a dry-type transformer proposed in this invention;

[0019] Figure 2 This is a three-dimensional structural diagram of a dry-type transformer proposed in this invention from another perspective;

[0020] Figure 3This is a cross-sectional structural schematic diagram of a dry-type transformer proposed in this invention;

[0021] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0022] Figure 5 This is a side cross-sectional view of a dry-type transformer proposed in this invention.

[0023] Figure 6 This is a top sectional view of a dry-type transformer proposed in this invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the heat dissipation component proposed in this invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the connecting component proposed in this invention.

[0026] In the diagram: 1. Main frame; 2. Heat dissipation mechanism; 201. Heat dissipation component; 20101. Mounting cylinder; 20102. Oil pump; 20103. Oil cooling pipe; 20104. Connecting pipe; 20105. Crossbeam; 20106. Drive motor; 20107. Fan blade; 202. Mounting bracket; 203. Support plate; 3. Coil assembly; 301. Connecting wire; 302. Long wire; 303. Short wire; 304. Insulator; 305. Low-voltage connector. 306, pad; 307, first temperature sensor; 4, base; 5, connecting assembly; 501, connecting plate; 50101, arc groove; 502, positioning pin; 503, buffer pad; 504, locking disc; 505, connecting column; 506, connecting spring; 507, eccentric wheel; 508, touch button; 509, mounting column; 6, upper clamp; 7, second temperature sensor; 8, controller; 9, signal transmitter; 10, lower clamp; 11, support frame. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figures 1-8A dry-type transformer includes: a main frame 1, three coil assemblies 3 sleeved on the outside of the main frame 1, a pad 306 on the top of the coil assembly 3, a first temperature sensor 307 on the bottom of the pad 306, a heat dissipation mechanism 2 on the rear side of the main frame 1, the heat dissipation mechanism 2 including: a mounting frame 202, a support plate 203 and three sets of heat dissipation components 201, the heat dissipation components 201 including: an oil cooling pipe 20103, a connecting pipe 20104, a mounting cylinder 20101, a fan blade 20107 and a drive motor 20106, lower clamps 10 fixedly installed on the bottom of the front and rear sides of the main frame 1, a support frame 11 fixedly installed on the bottom of the lower clamps 10, a base 4 on the bottom of the support frame 11, and a connecting component 5 between the base 4 and the support frame 11. The heat dissipation mechanism 2 integrates air cooling and oil cooling mechanisms, which not only quickly reduces the coil temperature, but also reduces energy waste through coordinated work, significantly improving the stability of the transformer under high load conditions.

[0029] In this embodiment, a crossbeam 20105 is fixedly installed inside the mounting cylinder 20101, a drive motor 20106 is fixedly installed on the rear side of the crossbeam 20105, a fan blade 20107 is fixedly installed on the output shaft of the drive motor 20106, a connecting pipe 20104 is fixedly installed inside the mounting cylinder 20101, and an oil cooling pipe 20103 is sleeved on the outside of the coil assembly 3. One end of the oil cooling pipe 20103 is connected to the connecting pipe 20104. An oil pump 20102 is provided at the top of the mounting cylinder 20101, and the other end of the oil cooling pipe 20103 is connected to the oil outlet of the oil pump 20102. The oil cooling pipe 20103 is made of copper, whose high thermal conductivity ensures efficient heat transfer and can quickly dissipate the heat from the coil assembly 3, preventing performance degradation caused by local overheating. At the same time, the fan blade 20107 is made of lightweight aluminum alloy, which reduces rotational noise and wear, and extends the service life of the heat dissipation system.

[0030] In this embodiment, a controller 8, a signal transmitter 9, and a second temperature sensor 7 are provided on the top of the main frame 1. The controller 8 is connected to the signal transmitter 9, the second temperature sensor 7, the first temperature sensor 307, the oil pump 20102, and the drive motor 20106. The controller 8 dynamically adjusts the operating parameters of the oil pump 20102 and the drive motor 20106 by analyzing the temperature data in real time, so as to achieve precise heat dissipation control, which not only saves energy, but also avoids equipment failure caused by overcooling or overheating.

[0031] In this embodiment, the connecting component 5 includes: a connecting plate 501, a locking disc 504, a connecting post 505, an eccentric wheel 507, a buffer pad 503, and a touch button 508. The buffer pad 503 is fixedly installed on the top of the connecting plate 501, and the top of the buffer pad 503 is fixedly installed inside the support frame 11. A groove is provided at the bottom of the connecting plate 501, and arc-shaped grooves 50101 are provided on the inner walls of both sides of the groove. The left and right sides of the locking disc 504 are respectively movably engaged in the corresponding arc-shaped grooves 50101. Notch slots are provided on both the front and rear sides of the locking disc 504. The top of the connecting post 505 is fixedly connected to the locking disc 504, and the bottom of the connecting post 505 is fixedly connected to the eccentric wheel 507. A connecting spring 506 is provided on the outer side of the connecting post 505, and the top of the connecting spring 506 is connected to... Inside the base 4, the touch button 508 is located on one side of the eccentric wheel 507, and a mounting post 509 is fixedly installed on the other side of the touch button 508. The other end of the mounting post 509 is fixedly installed on the side wall of the base 4. A positioning pin 502 is fixedly installed on the top of the base 4. The positioning pin 502 is movably inserted into the inside of the connecting plate 501. The buffer pad 503 is made of wear-resistant rubber, which has excellent shock absorption performance and can absorb daily vibration and impact, protecting the internal structure from damage. The design of the locking disc 504 and the arc groove 50101 not only provides a firm lock to prevent loosening, but also allows for quick disassembly through simple rotation, greatly shortening maintenance time. The touch button 508 is treated with oil resistance to enhance reliability in humid environments and ensure that an alarm can be triggered immediately when an accidental vibration signal is triggered.

[0032] In this embodiment, a shorting wire 303 is connected to the top of the coil assembly 3. Upper clamps 6 are fixedly installed on the top of both the front and rear sides of the main frame 1. A low-voltage connector 305 is fixedly installed on one side of the upper clamp 6. An insulator 304 is connected to the other end of the low-voltage connector 305. The other end of the shorting wire 303 is connected to the other end of the insulator 304. A connecting wire 301 connects two adjacent coil assemblies 3. A long wire 302 connects the coil assemblies 3 on the left and right sides. The insulator 304 is made of ceramic composite material and has high-voltage insulation characteristics, which can effectively isolate the risk of electric arc and ensure safe operation. The structural arrangement of the shorting wire 303 and the long wire 302 optimizes the current distribution, reduces energy loss, and improves the overall efficiency of the transformer.

[0033] In this embodiment, the connecting column 505 is rotatably installed inside the base 4. The outer side of the connecting column 505 is provided with a stepped surface, which movably abuts against the top inner wall of the base 4, thereby limiting the position of the connecting column 505. The surface of the connecting column 505 is covered with a hard coating to enhance wear resistance and corrosion resistance, ensuring that it maintains accuracy during frequent rotation. The stepped surface design, combined with the inner wall of the base 4, provides additional support and reduces vibration transmission to the main frame 1.

[0034] In this embodiment, the main frame 1 includes two yokes and three winding posts. The two ends of the winding posts are fixedly connected to the corresponding yokes. The coil assembly 3 includes a high-voltage coil, a low-voltage coil, and an insulating cylinder. The insulating cylinder is disposed between the high-voltage coil and the low-voltage coil. The low-voltage coil is wound on the outside of the corresponding winding post. The mounting cylinder 20101 is fixedly mounted on the top of the mounting frame 202. The support plate 203 is fixedly mounted on the bottom of the mounting frame 202. The bottom of the support plate 203 is fixedly connected to the support frame 11. The yokes and winding posts are made of high-permeability silicon steel sheets to optimize the magnetic flux path, reduce iron loss, and improve the power conversion efficiency. The insulating cylinder is made of resin-based composite material, which is flame-retardant and heat-resistant, prevents short circuits between coils, and extends the equipment life.

[0035] In this embodiment, the drive motor 20106 is started to drive the fan blade 20107 to rotate, thereby increasing the airflow speed around the coil assembly 3 and improving the heat dissipation efficiency. The oil pump 20102 is started to introduce external cooling oil into the cooling pipe. When the cooling oil flows through the cooling pipe, it carries away the heat on the coil assembly 3. Then the cooling oil flows through the connecting pipe 20104, and the wind force generated by the rotation of the fan blade 20107 accelerates the cooling of the cooling oil in the connecting pipe 20104, thereby facilitating the recycling of the cooling oil. The temperature of the coil assembly 3 is monitored by the first temperature sensor 307 and the temperature of the main frame 1 is monitored by the second temperature sensor 7. The monitoring signals are transmitted to the controller 8. The controller 8 controls the power of the drive motor 20106 and the oil pump 20102 according to the temperature, thereby adjusting the appropriate cooling power to meet the usage requirements of different working conditions and environments.

[0036] The cooling oil is an insulating oil, preferably the insulating oil used in wet transformers; the composition of this insulating oil is well-known and will not be described further. In practice, other liquids can also be used as coolants, such as water, provided that sealing performance is guaranteed.

[0037] The locking plate 501 is locked by the cooperation of the locking disc 504 and the arc groove 50101. The connecting column 505 and the locking disc 504 are rotated by manually rotating the eccentric wheel 507, so that the notch of the locking disc 504 is aligned with the arc groove 50101, thereby releasing the locking disc 504 from locking the connecting plate 501, so as to facilitate its disassembly and maintenance. When disassembly is not required, when the eccentric wheel 507 rotates due to external vibration, the eccentric wheel 507 can contact the touch button 508, thereby controlling the signal transmitter 9 to send a signal so that the staff can perform maintenance.

[0038] The drive motor 20106 in the heat dissipation mechanism 2 rotates the fan blades 20107 to increase the airflow speed around the coil assembly 3. At the same time, the oil pump 20102 introduces cooling oil into the oil cooling pipe 20103 to remove heat. The cooling oil is accelerated by the fan blades 20107 in the connecting pipe 20104 to achieve efficient heat dissipation and oil resource recycling. The controller 8 monitors the temperature of the coil assembly 3 in conjunction with the first temperature sensor 307 and the temperature of the main frame 1 in conjunction with the second temperature sensor 7, and dynamically adjusts the power of the drive motor 20106 and the oil pump 20102 to adapt to different working conditions and environmental requirements and optimize energy efficiency. The connecting assembly 5 uses the locking disc 504 and the arc groove 50101 to achieve stable locking. Manually rotating the eccentric wheel 507 can drive the connecting column 505 to move, so that the notch of the locking disc 504 is aligned with the arc groove 50101 to unlock, which facilitates equipment disassembly and maintenance. When the eccentric wheel 507 rotates due to accidental vibration, it contacts the touch button 508 to trigger the signal transmitter 9 to issue an alarm to notify the maintenance personnel, ensuring equipment safety and timely maintenance.

[0039] The dry-type transformer provided by this invention has been described in detail above. Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A dry-type transformer, comprising a main frame (1), wherein three coil assemblies (3) are sleeved on the outer side of the main frame (1), and a pad (306) is provided on the top of the coil assembly (3), characterized in that, include: The bottom of the pad (306) is provided with a first temperature sensor (307), and the rear side of the main frame (1) is provided with a heat dissipation mechanism (2). The heat dissipation mechanism (2) includes: a mounting bracket (202), a support plate (203) and three sets of heat dissipation components (201). The heat dissipation components (201) include: an oil cooling pipe (20103), a connecting pipe (20104), a mounting cylinder (20101), a fan blade (20107) and a drive motor (20106). The bottom of the front and rear sides of the main frame (1) are fixedly installed with lower clamps (10). The bottom of the lower clamps (10) is fixedly installed with a support frame (11). The bottom of the support frame (11) is provided with a base (4). A connecting component (5) is provided between the base (4) and the support frame (11). The connecting assembly (5) includes: a connecting plate (501), a locking disc (504), a connecting post (505), an eccentric wheel (507), a buffer pad (503), and a touch button (508). The buffer pad (503) is fixedly installed on the top of the connecting plate (501), and the top of the buffer pad (503) is fixedly installed inside the support frame (11). The bottom of the connecting plate (501) has a groove, and the inner walls of both sides of the groove have arc-shaped grooves (50101). The left and right sides of the locking disc (504) are respectively movably engaged in the corresponding arc-shaped grooves (50101). The front and rear sides of the locking disc (504) have notch grooves. The connecting post (507) is fixedly installed on the top of the connecting plate (501), the top of the buffer pad (503) is fixedly installed inside the support frame (11). The bottom of the connecting plate (501) has a groove, and the inner walls of both sides of the groove have arc-shaped grooves (50101). The left and right sides of the locking disc (504) are respectively engaged in the corresponding arc-shaped grooves (50101). The front and rear sides of the locking disc (504) have notch grooves. The connecting post (507) is fixedly installed on the top of the connecting plate (501), the top of the connecting plate (504) is fixedly installed inside the support frame (11). The bottom of the connecting plate (501) has a groove, and the inner walls of both sides of the groove have arc-shaped grooves (50101). The connecting post (508) is fixedly installed on the top of the connecting plate (501), the top of the connecting plate (504) has a groove, and the inner walls of both sides of the connecting plate (504) have arc-shaped grooves (505). The connecting post (507) is fixedly installed on the top of the connecting plate (504 The top of the 05) is fixedly connected to the locking disc (504), the bottom of the connecting column (505) is fixedly connected to the eccentric wheel (507), a connecting spring (506) is provided on the outside of the connecting column (505), the top of the connecting spring (506) is connected to the inside of the base (4), the touch button (508) is provided on one side of the eccentric wheel (507), a mounting column (509) is fixedly installed on the other side of the touch button (508), the other end of the mounting column (509) is fixedly installed on the side wall of the base (4), a positioning pin (502) is fixedly installed on the top of the base (4), and the positioning pin (502) is movably inserted into the inside of the connecting plate (501).

2. The dry-type transformer according to claim 1, characterized in that, A crossbeam (20105) is fixedly installed inside the mounting cylinder (20101). The drive motor (20106) is fixedly installed on the rear side of the crossbeam (20105). The fan blade (20107) is fixedly installed on the output shaft of the drive motor (20106). The connecting pipe (20104) is fixedly installed inside the mounting cylinder (20101). The oil cooling pipe (20103) is sleeved on the outside of the coil assembly (3). One end of the oil cooling pipe (20103) is connected to the connecting pipe (20104). An oil pump (20102) is provided at the top of the mounting cylinder (20101). The other end of the oil cooling pipe (20103) is connected to the oil outlet of the oil pump (20102).

3. The dry-type transformer according to claim 1, characterized in that, The top of the main frame (1) is provided with a controller (8), a signal transmitter (9) and a second temperature sensor (7). The controller (8) is connected to the signal transmitter (9), the second temperature sensor (7), the first temperature sensor (307), the oil pump (20102) and the drive motor (20106).

4. The dry-type transformer according to claim 1, characterized in that, The top of the coil assembly (3) is connected to a short wire (303). The top of the front and rear sides of the main frame (1) are fixedly installed with upper clamps (6). A low-voltage connector (305) is fixedly installed on one side of the upper clamp (6). The other end of the low-voltage connector (305) is connected to an insulator (304). The other end of the short wire (303) is connected to the other end of the insulator (304). A connecting wire (301) is connected between two adjacent coil assemblies (3). A long wire (302) is connected between the coil assemblies (3) located on the left and right sides.

5. The dry-type transformer according to claim 1, characterized in that, The connecting column (505) is rotatably installed inside the base (4), and a stepped surface is provided on the outer side of the connecting column (505), which movably abuts against the top inner wall of the base (4).

6. The dry-type transformer according to claim 1, characterized in that, The main frame (1) includes two yokes and three winding posts. The two ends of the winding posts are fixedly connected to the corresponding yokes. The coil assembly (3) includes a high-voltage coil, a low-voltage coil and an insulating cylinder. The insulating cylinder is disposed between the high-voltage coil and the low-voltage coil. The low-voltage coil is wound on the outside of the corresponding winding post. The mounting cylinder (20101) is fixedly installed on the top of the mounting frame (202). The support plate (203) is fixedly installed on the bottom of the mounting frame (202). The bottom of the support plate (203) is fixedly connected to the support frame (11).

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