Dry-type transformer with power-off protection function

Abstract

The invention discloses a dry-type transformer with a power-off protection function, and belongs to the technical field of transformers, the dry-type transformer comprises a heat dissipation detection mechanism, the heat dissipation detection mechanism comprises a first motor fixed on the side wall of a box body, and an output shaft of the first motor sequentially extends to a first bevel gear and a first rotating tooth; second bevel gears fixed to a movable shaft are in meshing transmission with the two ends of the outer wall of the first bevel gear, the movable shaft and the first rotating shaft are in transmission connection through a first conveying belt, and one end of the first rotating shaft is connected with blades arranged at the ventilation holes. Wherein the outer wall of the first rotating tooth is in engaged transmission with a second rotating tooth arranged on the mounting seat, and the second rotating tooth is integrally connected with a rotating ring. The technical problems that when a single fixed camera carries out image monitoring, real-time safety monitoring cannot be carried out on the whole transformer, and temperature changes and other data changes of all parts of the transformer cannot be accurately monitored can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a dry-type transformer with a power-off protection function. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling and forced air cooling. When the transformer is naturally cooled, it can operate continuously for a long time at the rated capacity. When forced air cooling, the transformer output capacity can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; due to the large increase in load loss and impedance voltage during overload, it is in a non-economic operation state, so it should not be allowed to operate continuously for a long time.

[0003] At present, most of the monitoring devices for transformers realize image monitoring through a single fixed camera, and carry out corresponding safety inspections on the transformer installation area, so as to achieve a monitoring purpose of the temperature and working condition data generated by the transformer. However, the existing method is not accurate, and it is impossible to carry out real-time safety monitoring of the entire transformer, and it is impossible to accurately monitor the temperature changes and other data changes of various parts of the transformer. For example, if there is damage to the outside of the transformer or aging of electrical components during operation, it is impossible to make corresponding processing in time. When it is necessary to inspect the transformer, it is often necessary to open the external noise reduction shell to inspect its interior. This method is not only inefficient, but also when the transformer is in high-voltage transmission, there are often certain safety risks when manual inspection is carried out. Summary of the invention

[0004] The purpose of the present invention is to provide a dry-type transformer with a power-off protection function to solve the technical problem that when a single fixed camera is used for image monitoring, the entire transformer cannot be monitored in real time for safety, and the temperature changes and other data changes of various parts of the transformer cannot be accurately monitored.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dry-type transformer with power-off protection function, comprising:

[0007] The heat dissipation detection mechanism comprises a first motor fixed on the side wall of the box body, the output shaft of the first motor sequentially extends to the first bevel gear and the first rotating tooth, both ends of the outer wall of the first bevel gear are meshed with the second bevel gear fixed on the movable shaft, the movable shaft and the first rotating shaft are connected by the first conveyor belt transmission, and one end of the first rotating shaft is connected to a blade placed at the ventilation hole;

[0008] Among them, the outer wall of the first rotating tooth is meshed and transmitted with a second rotating tooth placed on the mounting seat, the second rotating tooth is integrally connected with a rotating ring, one end of the rotating ring is connected to a panel through a bracket, a baffle is installed on the top of the panel, a second motor is installed on one side of the baffle, the output shaft of the second motor passes through the baffle and is meshed and transmitted with a fourth bevel gear through a third bevel gear, the central axis of the fourth bevel gear is connected to a cam placed on the outside of the cover body through a telescopic rod, and the outer wall of the cam is in contact with and fits with the pushing mechanism.

[0009] Furthermore, the pushing mechanism includes a second rotating shaft movably connected to the baffle, the second rotating shaft and the second motor output shaft are connected through a second conveyor belt transmission, and one end of the second rotating shaft passes through the baffle and extends to the turntable, the protrusion on the turntable and the slider are connected through a swing rod, one end of the slider is fixed on the telescopic assembly, and the vertical central axis of the turntable and the vertical central axis of the slider are maintained on the same axis.

[0010] Furthermore, both ends of the swing rod are installed on the turntable and the slider by means of a rotational connection. The telescopic assembly includes a hollow sleeve fixed on the panel. The bottom of the inner wall of the sleeve is connected to a movable rod through a first spring. Trapezoidal grooves are provided at both ends of the side walls of the sleeve. Rollers connected to the movable rod are provided in the trapezoidal grooves.

[0011] Furthermore, a support plate is fixedly installed on the top of the movable rod, and the two sides of the extended end of the support plate and the movable plate are connected by a second spring. The movable plate is connected with a slide groove along the length direction of the support plate, and both ends of the outer wall of the movable plate are equipped with limit blocks that abut against the cam through fixed rods on the side away from the second spring, and a monitor is detachably installed on the top of the movable plate.

[0012] Furthermore, both ends of the fixing rod are connected to the movable plate and the limit block in a plug-in manner, and one end of the monitor is connected to a camera adapted thereto near the mounting seat.

[0013] Furthermore, one end of the slider passes through the cover body and extends to the guide sleeve on the outer wall of the telescopic rod. The inner wall edge of the guide sleeve is integrally connected with an annular portion. The outer wall of the annular portion is provided with an annular groove recessed inwardly of the telescopic rod. The outer wall edge of the telescopic rod is provided with a rotating groove connected to the cover body. As the second motor is started, the slider drives the telescopic rod and the movable rod to move up and down synchronously.

[0014] Furthermore, the slider is connected with a strip groove along the height direction of the cover body, and the strip groove is designed to be telescopic and movable. A mounting hole is opened at the connection between the slider and the telescopic rod and they are connected by locking and fixing with a positioning pin.

[0015] Furthermore, one end of the first rotating shaft is installed with a connecting frame placed on the top of the inner wall of the box body through a bearing, the bottom of the panel is in contact with and fits on the rolling ball, the rolling balls are distributed in a circular array on the mounting seat, and the mounting seat is provided with a rolling groove connected to the rolling balls, and both sides of the top of the rolling groove are provided with arc surfaces placed on the rolling balls.

[0016] Furthermore, the mounting seat is provided with a base plate connected to the transformer support, and a storage box is provided directly above the transformer and placed on the top of the inner wall of the box. The bottom of the storage box is made of plastic film, and a cavity filled with dry yellow sand is formed between the plastic film and the inner wall of the storage box.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] (1) A heat dissipation detection mechanism is set up. After the first motor is started, it can drive the first bevel gear and the first rotating tooth to rotate at the same time. Under the gear meshing transmission action, in conjunction with the transmission connection of the conveyor belt, the blades at the ventilation hole can rotate to dissipate heat. During the rotation of the first rotating tooth, the second rotating tooth can be driven to rotate on the mounting seat, and the monitoring mechanism can be driven to rotate synchronously, so that the monitoring mechanism can perform monitoring work in all directions without blind spots. In addition, the rolling balls in the circular array on the mounting seat can effectively reduce the friction force and friction damage of the monitoring mechanism during the rotation process, thereby increasing the service life of the device. At the same time, the arc surface on the rolling groove can not only ensure the normal rotation of the rolling ball, but also effectively prevent the rolling ball from leaving the track during the rotation process, effectively ensuring the stability of the device. The monitoring equipment that can move around can replace manual inspections and reduce the safety risks of staff, thereby achieving the advantages of high efficiency and convenience, and improving work efficiency and safety.

[0019] (2) A driving mechanism is provided. After the second motor is started, it can drive the turntable on the second rotating shaft to rotate in the horizontal direction and the telescopic rod to rotate in the vertical direction under the action of mechanical transmission. During the rotation of the turntable, the swing rod can be used to drive the movable rod on the telescopic assembly to move up and down. During the movement of the movable rod, the monitor can be driven to rise and fall synchronously, so that the monitor can adaptively monitor transformers of different heights in all directions. Moreover, during the movement of the slider up and down, the guide sleeve can be used to drive the synchronous movement of the telescopic rod, so that the cam and the monitor can always be set at the same height difference. In this way, when the telescopic rod drives the cam to rotate, the second spring can be used to convert the rotational motion of the cam into the linear motion of the monitor. In this way, the monitor can also be adjusted in the horizontal direction during the lifting process. Automatic focusing can be performed during the horizontal adjustment process, which effectively improves the clarity of the captured image information and can clearly capture the details of the transformer appearance, such as cracks, rust, oil leakage, etc., thereby improving the accuracy of monitoring.

[0020] (3) A telescopic component is provided. When the movable rod moves up and down on the inner wall of the sleeve, the first spring can buffer and adjust the movement of the movable rod, and can also ensure the stability of the moving track of the movable rod. The trapezoidal groove on the inner wall of the sleeve cooperates with the roller, which can not only reduce friction, but also simplify the structural design. Through the support mechanism of geometric mechanics, the stability of the support of the inner wall of the sleeve is guaranteed, and the movable rod can perform stable lifting and lowering movements, which greatly improves the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a dry-type transformer with power-off protection function of the present invention;

[0023] Figure 2 It is a front view of a dry-type transformer with a power-off protection function according to the present invention;

[0024] Figure 3 The interior of the box of the present invention is schematically shown in FIG. Figure 1 ;

[0025] Figure 4 The interior of the box of the present invention is schematically shown in FIG. Figure 2 ;

[0026] Figure 5 Schematic diagram of meshing transmission between the first bevel gear and the second bevel gear of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the driving mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the telescopic assembly of the present invention;

[0029] Figure 8 It is a schematic diagram of the meshing transmission of the third bevel gear and the fourth bevel gear of the present invention.

[0030] Figure numerals: 1, heat dissipation detection mechanism; 2, box body; 3, first motor; 4, first bevel gear; 5, first rotating tooth; 6, second bevel gear; 7, first rotating shaft; 8, first conveyor belt; 9, ventilation hole; 10, blade; 11, mounting seat; 12, second rotating tooth; 13, rotating ring; 14, panel; 15, baffle; 16, second motor; 17, cover body; 18, third bevel gear; 19, telescopic rod; 20, cam; 21, push Mechanism; 22, second rotating shaft; 23, second conveyor belt; 24, turntable; 25, slider; 26, swing rod; 27, telescopic assembly; 28, sleeve; 29, first spring; 30, movable rod; 31, trapezoidal groove; 32, roller; 33, support plate; 34, movable plate; 35, second spring; 36, limit block; 37, monitor; 38, guide sleeve; 39, connecting frame; 40, rolling ball; 41, storage box; 42, fourth bevel gear. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Manual Attached Figure 1 , Attachment Figure 3 and attached Figure 4 As shown, a dry-type transformer with a power-off protection function comprises: a heat dissipation detection mechanism 1, the heat dissipation detection mechanism 1 comprises a first motor 3 fixed on the side wall of a box body 2, the output shaft of the first motor 3 sequentially extends to a first bevel gear 4 and a first rotating tooth 5, both ends of the outer wall of the first bevel gear 4 are meshed and driven with a second bevel gear 6 fixed on a movable shaft, the movable shaft and the first rotating shaft 7 are connected by a first conveyor belt 8, and one end of the first rotating shaft 7 is connected to a blade 10 placed at a ventilation hole 9;

[0033] Among them, the outer wall of the first rotating tooth 5 is meshed and transmitted with the second rotating tooth 12 placed on the mounting seat 11, and the second rotating tooth 12 is integrally formed with a rotating ring 13, one end of the rotating ring 13 is connected to a panel 14 through a bracket, a baffle 15 is installed on the top of the panel 14, and a second motor 16 is installed on one side of the baffle 15. The output shaft of the second motor 16 passes through the baffle 15 and is meshed and transmitted with the fourth bevel gear 42 through the third bevel gear 18. The central axis of the fourth bevel gear 42 is connected to a cam 20 placed on the outside of the cover body 17 through a telescopic rod 19, and the outer wall of the cam 20 is in contact with the pushing mechanism 21.

[0034] Specifically, the movable shafts on the first bevel gear 4 and the second bevel gear 6 are placed in a shell inside the box body 2, and the shell is distributed in a strip shape, thereby playing a corresponding supporting and connecting role for the first bevel gear 4 and the second bevel gear 6. At the same time, a slot connected to the first conveyor belt 8 is opened on the shell, which can facilitate the free rotation of the first conveyor belt 8, so that power can be transmitted to the first rotating shaft 7 to make it rotate, thereby achieving the effect of ventilation and heat dissipation, thereby avoiding the working environment temperature inside the box body 2 from being too high.

[0035] The material of the box body 2 can be made of polyester fiber sound-absorbing board and damping sound insulation board, which can effectively consume sound energy, reduce structural vibration and sound propagation. In addition, the bearing on the connecting frame 39 can provide corresponding supporting force to the first rotating shaft 7 and can also ensure the free rotation of the first rotating shaft 7.

[0036] A heat dissipation detection mechanism 1 is set up. After the first motor 3 is started, it can drive the first bevel gear 4 and the first rotating tooth 5 to rotate at the same time. Under the action of the gear meshing transmission and in cooperation with the transmission connection of the conveyor belt, the blades 10 at the ventilation hole 9 can rotate to dissipate heat. During the rotation of the first rotating tooth 5, the second rotating tooth 12 can be driven to rotate on the mounting seat 11, and the monitoring mechanism can be driven to rotate synchronously, so that the monitoring mechanism can perform monitoring work in an all-round manner without blind spots. In addition, the rolling balls 40 in an annular array on the mounting seat 11 can effectively reduce the friction force and reduce friction damage of the monitoring mechanism during the rotation process, thereby increasing the service life of the device. At the same time, the arc surface on the rolling groove can not only ensure the normal rotation of the rolling ball 40, but also effectively prevent the rolling ball 40 from getting off the track during the rotation process, effectively ensuring the stability of the device. The monitoring equipment that can move around can replace manual inspections and reduce the safety risks of staff, thereby achieving the advantages of high efficiency and convenience, and improving work efficiency and safety.

[0037] refer to Figure 3 and Figure 4The pushing mechanism 21 includes a second rotating shaft 22 movably connected to the baffle 15, the second rotating shaft 22 and the output shaft of the second motor 16 are connected through a second conveyor belt 23, and one end of the second rotating shaft 22 passes through the baffle 15 and extends to the turntable 24, the protrusion on the turntable 24 and the slider 25 are connected through a swing rod 26, one end of the slider 25 is fixed on the telescopic assembly 27, and the vertical central axis of the turntable 24 and the vertical central axis of the slider 25 are maintained on the same axis.

[0038] Both ends of the swing rod 26 are installed on the turntable 24 and the slider 25 by means of a rotational connection. The telescopic assembly 27 includes a hollow sleeve 28 fixed on the panel 14. The bottom of the inner wall of the sleeve 28 is connected to a movable rod 30 through a first spring 29. Trapezoidal grooves 31 are provided at both ends of the side walls of the sleeve 28. A roller 32 connected to the movable rod 30 is provided in the trapezoidal groove 31.

[0039] The working principle of the driving mechanism 21 is as follows:

[0040] The second motor 16 is started to drive the third bevel gear 18 inside the cover body 17 to rotate. Under the gear meshing transmission, the third bevel gear 18 can drive the rotation of the telescopic rod 19 in the vertical direction, so that the telescopic rod 19 can drive the synchronous rotation of the cam 20. During the rotation of the cam 20, it can contact and fit with the limit block 36, and cooperate with the second spring 35 on the movable plate 34 to convert the rotational movement of the cam 20 into the horizontal movement of the movable plate 34, so that the monitoring distance between the monitor 37 and the transformer can be adjusted, and a clear image can be obtained during the automatic focusing process. For example, the second motor 16 can also transmit power to the second rotating shaft 22 through the second conveyor belt 23. Under the rotation connection of the swing rod 26, the movable rod 30 and the telescopic rod 19 can be driven to move up and down synchronously. The up and down movement of the movable rod 30 can drive the monitoring mechanism to move synchronously, so as to obtain comprehensive image information. The up and down movement of the telescopic rod 19 is to ensure that the cam 20 and the limit block 36 are always at the same height, which can prevent position deviation and avoid the inability of the monitoring mechanism to move horizontally at the same time.

[0041] By extension, both ends of the telescopic rod 19 have protrusions, and the telescopic rod 19 is connected to the groove of the central axis by an embedded fixation method, so that the central axis can not only drive the rotation of the telescopic rod 19, but also enable the telescopic rod 19 to move up and down normally. The above technical solution is a conventional technical means for technical personnel in this field. Therefore, there is no corresponding illustration, but it does not affect the effective implementation of the technical solution of the present invention.

[0042] A pushing mechanism 21 is provided. After the second motor 16 is started, under the action of mechanical transmission, the turntable 24 on the second rotating shaft 22 can be driven to rotate in the horizontal direction, and the telescopic rod 19 can be driven to rotate in the vertical direction. During the rotation of the turntable 24, the swing rod 26 can be used to drive the movable rod 30 on the telescopic assembly 27 to move up and down. During the movement of the movable rod 30 up and down, the monitor 37 can be driven to rise and fall synchronously, so that the monitor 37 can adaptively perform all-round monitoring of transformers at different heights. In addition, when the slider 25 moves up and down, the guide sleeve 3 can be used to control the movable rod 30 on the telescopic assembly 27. 8 drives the synchronous movement of the telescopic rod 19, so that the cam 20 and the monitor 37 are always set at the same height difference. In this way, when the telescopic rod 19 drives the cam 20 to rotate, in conjunction with the second spring 35, the rotational motion of the cam 20 can be converted into a linear motion of the monitor 37. In this way, the monitor 37 can also be adjusted in the horizontal direction during the lifting process, and can perform automatic focusing processing during the horizontal adjustment process, which effectively improves the clarity of the captured image information, can clearly capture the details of the transformer appearance, such as cracks, rust, oil leakage, etc., and improves the accuracy of monitoring.

[0043] refer to Figure 3 , Figure 6 and Figure 7 A support plate 33 is fixedly installed on the top of the movable rod 30, and the two sides of the extended end of the support plate 33 and the movable plate 34 are connected by a second spring 35. The movable plate 34 is connected with a slide groove along the length direction of the support plate 33, and both ends of the outer wall of the movable plate 34 are installed with limit blocks 36 that are in contact with the cam 20 through fixed rods on the side away from the second spring 35, and a monitor 37 is detachably installed on the top of the movable plate 34.

[0044] Both ends of the fixed rod are connected to the movable plate 34 and the limit block 36 by plug-in installation. One end of the monitor 37 is connected to a camera compatible with it near the mounting seat 11. One end of the slider 25 passes through the cover body 17 and extends to the guide sleeve 38 on the outer wall of the telescopic rod 19. An annular portion is integrally formed and connected at the edge of the inner wall of the guide sleeve 38. An annular groove recessed inwardly of the telescopic rod 19 is provided on the outer wall of the annular portion. A rotating groove connected to the cover body 17 is provided on the edge of the outer wall of the telescopic rod 19. As the second motor 16 is started, the slider 25 drives the telescopic rod 19 and the movable rod 30 to move up and down synchronously.

[0045] Specifically, the up and down movement of the slider 25 can transmit power to the movable rod 30 and the telescopic rod 19 at the same time, and the guide sleeve 38 on the slider 25 is arranged to cooperate with the inwardly recessed annular groove of the telescopic rod 19, which can not only drive the up and down movement of the telescopic rod 19, but also enable the telescopic rod 19 to rotate normally, so that the monitoring mechanism can perform up and down adjustment movement and horizontal movement at the same time, and the two interact with each other to obtain all-round clear image information.

[0046] refer to Figure 4 and Figure 8 The slider 25 is connected with a strip groove along the height direction of the cover body 17, and the strip groove is designed to be telescopic and movable. A mounting hole is opened at the connection between the slider 25 and the telescopic rod 19 and is connected by locking and fixing with a locating pin. One end of the first rotating shaft 7 is installed with a connecting frame 39 placed on the top of the inner wall of the box body 2 through a bearing. The bottom of the panel 14 contacts and fits on the rolling ball 40. The rolling ball 40 is distributed in a ring array on the mounting seat 11. The mounting seat 11 is provided with a rolling groove connected to the rolling ball 40, and arc surfaces placed on the rolling ball 40 are provided on both sides of the top of the rolling groove.

[0047] A telescopic component 27 is provided. When the movable rod 30 moves up and down on the inner wall of the sleeve 28, the first spring 29 can buffer and adjust the movement of the movable rod 30, and can also ensure the stability of the movement track of the movable rod 30. The trapezoidal groove 31 on the inner wall of the sleeve 28 cooperates with the roller 32, which can not only reduce friction, but also simplify the structural design. Through the support mechanism of geometric mechanics, the stability of the support of the inner wall of the sleeve 28 is guaranteed, and the movable rod 30 can be ensured to perform stable lifting and lowering movements, thereby greatly improving the applicability of the device.

[0048] Specifically, the mounting base 11 is provided with a base plate connected to the transformer support, and a storage box 41 is provided directly above the transformer and is placed on the top of the inner wall of the box body 2. The bottom of the storage box 41 is made of plastic film, and a cavity filled with dry yellow sand is formed between the plastic film and the inner wall of the storage box 41.

[0049] When a transformer is short-circuited, it is usually accompanied by a corresponding fire source. When the transformer catches fire, the temperature inside the box 2 increases, the plastic film breaks under high temperature, and the dry yellow sand inside the cavity automatically falls onto the transformer due to gravity. When the yellow sand is scattered on the surface of the burning object, it will form a thick covering layer, isolating the burning object from the oxygen in the air, so that the flame is extinguished due to lack of oxygen. In addition, the dry yellow sand can also absorb part of the heat from the fire source, further reducing the fire. Moreover, the yellow sand is mainly composed of silicate minerals, which themselves do not have conductivity. The insulation of the dry yellow sand itself is also a good fire extinguishing material, which ultimately plays a good role in power failure protection.

[0050] Both sides of the top of the rolling groove are provided with arc surfaces placed on the rolling ball 40. The arc surfaces in the rolling groove mainly play a role of limiting the rolling ball 40 during movement to prevent the rolling ball 40 from deviating from the track.

[0051] The above are only preferred specific implementation modes 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 solutions and inventive concepts 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.

[0052] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dry-type transformer with power-off protection function, characterized in that: include: A heat dissipation detection mechanism (1), the heat dissipation detection mechanism (1) comprising a first motor (3) fixed on a side wall of a housing (2), an output shaft of the first motor (3) extending to a first bevel gear (4) and a first rotating tooth (5) in sequence, both ends of an outer wall of the first bevel gear (4) being meshed and driven with a second bevel gear (6) fixed on a movable shaft, the movable shaft and the first rotating shaft (7) being connected in transmission via a first conveyor belt (8), and one end of the first rotating shaft (7) being connected to a blade (10) disposed at a ventilation hole (9); The outer wall of the first rotating tooth (5) is meshed with a second rotating tooth (12) placed on the mounting seat (11); the second rotating tooth (12) is integrally formed with a rotating ring (13); one end of the rotating ring (13) is connected to a panel (14) through a bracket; a baffle (15) is installed on the top of the panel (14); a second motor (16) is installed on one side of the baffle (15); an output shaft of the second motor (16) passes through the baffle (15) and is meshed with a fourth bevel gear (42) through a third bevel gear (18); a central axis of the fourth bevel gear (42) is connected to a cam (20) placed outside the cover body (17) through a telescopic rod (19); and an outer wall of the cam (20) is in contact with and fits with a pushing mechanism (21).

2. A dry-type transformer with power-off protection function according to claim 1, characterized in that: The pushing mechanism (21) comprises a second rotating shaft (22) movably connected to the baffle (15); the second rotating shaft (22) and the output shaft of the second motor (16) are connected by a second conveyor belt (23); one end of the second rotating shaft (22) passes through the baffle (15) and extends to the turntable (24); the protrusion on the turntable (24) and the slider (25) are connected by a swing rod (26); one end of the slider (25) is fixed to the telescopic assembly (27); and the vertical center axis of the turntable (24) and the vertical center axis of the slider (25) are maintained on the same axis.

3. A dry-type transformer with power-off protection function according to claim 2, characterized in that: Both ends of the swing rod (26) are mounted on the turntable (24) and the slider (25) in a rotationally connected manner. The telescopic assembly (27) comprises a hollow sleeve (28) fixed on the panel (14). The bottom of the inner wall of the sleeve (28) is connected to a movable rod (30) via a first spring (29). Both ends of the side wall of the sleeve (28) are provided with trapezoidal grooves (31). A roller (32) connected to the movable rod (30) is provided in the trapezoidal groove (31).

4. A dry-type transformer with power-off protection function according to claim 3, characterized in that: A support plate (33) is fixedly mounted on the top of the movable rod (30); both sides of the extended end of the support plate (33) and the movable plate (34) are connected via a second spring (35); a slide groove is connected to the movable plate (34) along the length direction of the support plate (33); both ends of the outer wall of the movable plate (34) are mounted with limit blocks (36) that abut against the cam (20) via a fixed rod on the side away from the second spring (35); and a monitor (37) is detachably mounted on the top of the movable plate (34).

5. A dry-type transformer with power-off protection function according to claim 4, characterized in that: Both ends of the fixing rod are connected to the movable plate (34) and the limit block (36) in a plug-in installation manner, and one end of the monitor (37) is connected to a camera adapted thereto near the mounting seat (11).

6. A dry-type transformer with power-off protection function according to claim 2, characterized in that: One end of the slider (25) passes through the cover body (17) and extends to the guide sleeve (38) on the outer wall of the telescopic rod (19); an annular portion is integrally formed and connected at the edge of the inner wall of the guide sleeve (38); an annular groove is provided on the outer wall of the annular portion and is recessed inwardly of the telescopic rod (19); a rotation groove connected to the cover body (17) is provided on the outer wall edge of the telescopic rod (19); when the second motor (16) is started, the slider (25) drives the telescopic rod (19) and the movable rod (30) to move up and down synchronously.

7. A dry-type transformer with power-off protection function according to claim 6, characterized in that: The slider (25) is connected with a strip groove along the height direction of the cover body (17), and the strip groove is designed to be telescopic and movable. A mounting hole is provided at the connection between the slider (25) and the telescopic rod (19), and the slider and the telescopic rod (19) are connected in a locking and fixing manner by a positioning pin.

8. The dry-type transformer with power-off protection function according to claim 1, characterized in that: One end of the first rotating shaft (7) is mounted with a connecting frame (39) placed on the top of the inner wall of the box body (2) through a bearing, and the bottom of the panel (14) is in contact with the rolling balls (40). The rolling balls (40) are distributed in a ring array on the mounting seat (11). The mounting seat (11) is provided with a rolling groove connected to the rolling balls (40), and arc surfaces placed on the rolling balls (40) are provided on both sides of the top of the rolling groove.

9. The dry-type transformer with power-off protection function according to claim 1, characterized in that: The mounting seat (11) is provided with a bottom plate connected to the transformer support, and a storage box (41) is provided directly above the transformer and is placed on the top of the inner wall of the box body (2). The bottom of the storage box (41) is made of a plastic film, and a cavity filled with dry yellow sand is formed between the plastic film and the inner wall of the storage box (41).

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