Transformer partial discharge detection device with multi-position detection structure

Abstract

The invention discloses a transformer partial discharge detection device with a multi-position detection structure, and relates to the technical field of transformer partial discharge detection.The transformer partial discharge detection device comprises a transformer shell, an iron core is installed in the transformer shell, a plurality of insulating layers are installed on the iron core, and detection rings are installed outside the insulating layers in a sliding mode; a driving motor is installed at the top of the transformer shell, a reciprocating lead screw is installed on an output shaft of the driving motor, a lifting plate is installed on the reciprocating lead screw in a sliding mode, and the detection ring is fixed to the lifting plate; according to the invention, the lifting plate drives the detection ring to move up and down along the insulating layer, so that the insulating layer can be monitored in all directions, and a monitoring blind area is avoided; meanwhile, the damage condition of the surface of the insulating layer can be known through the touch piece on the inner wall of the detection ring, and partial discharge is prevented in advance; and when the lifting plate moves to the lowest point, the detection ring also drives the spoiler to rotate, so that the transformer oil is prevented from being deposited at the bottom, and the cooling efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer partial discharge detection, in particular to a transformer partial discharge detection device with a multi-position detection structure. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). In electrical equipment and wireless circuits, it is often used for voltage increase or decrease, impedance matching, and safety isolation.

[0003] When the internal insulation of a transformer is exposed to the operating voltage for a long time during operation, especially as the voltage level increases, the electric field strength of the insulation is very high, which can easily cause partial discharge in weak insulation. Although partial discharge is short-lived and has low energy, it is very harmful. Its long-term existence will cause great damage to the insulation material. First, the insulating material adjacent to the partial discharge will be directly bombarded by the discharge particles. Second, the chemical action of active gases such as heat, ozone, and nitrogen oxides generated by the discharge will cause local insulation corrosion and aging, increase conductivity, and ultimately lead to thermal breakdown. In a transformer in operation, aging and damage to the internal insulation mostly start from partial discharge.

[0004] In the existing technology, partial discharge monitoring of transformers is mainly achieved through built-in sensors. However, these built-in sensors are fixedly installed at a certain position of the insulation layer and can only monitor a part of the area. This is prone to blind spots and cannot perform comprehensive detection of partial discharge phenomena in transformers. Summary of the Invention

[0005] The purpose of the present invention is to provide a method to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: the transformer partial discharge detection device with a multi-position detection structure includes a transformer housing, an iron core is installed in the transformer housing, several insulating layers are installed on the iron core, a detection ring is slidably installed outside the insulating layer, a drive motor is installed on the top of the transformer housing, a reciprocating screw is installed on the output shaft of the drive motor, a lifting plate is slidably installed on the reciprocating screw, and the detection ring is fixed on the lifting plate.

[0007] As an optimal technical solution, a spiral groove is provided on the outer wall of the insulating layer, a spoiler is rotatably installed on the bottom of the insulating layer, the diameter of the spoiler is larger than the diameter of the insulating layer, blades are arranged around the outer wall of the spoiler, an annular groove is provided on the top of the spoiler, and a driving groove is provided on the side wall of the annular groove.

[0008] As a preferred technical solution, grooves are provided on both the upper and lower end surfaces of the detection ring, and spoilers are arranged at equal intervals in the grooves. The spoilers are arranged obliquely, and the spoilers arranged on the upper and lower end surfaces are inclined in opposite directions. Brushes are provided on the upper and lower sides of the inner wall of the detection ring, a driving plate is provided at the bottom of the detection ring, and two driving blocks are symmetrically provided on the inner wall of the driving plate, and a mounting groove is provided on the outer wall of the detection ring;

[0009] The inner wall of the detection ring is evenly provided with accommodating grooves, a touch piece is installed in the accommodating groove, a stopper is provided in the middle of the touch piece, a spring is fixedly connected to the bottom of the stopper, and a plurality of detection pieces are evenly arranged on the inner wall of the detection ring, wherein a limit column is provided between two of the touch pieces.

[0010] As an optimal technical solution, the driving groove includes an arc portion and a straight portion, the angle formed by the arc portion is 90 degrees, the straight portion is arranged in the vertical direction, and the length of the straight portion is equal to the height of the driving plate.

[0011] As a preferred technical solution, the drive motor is fixedly installed on the top of the transformer housing, the reciprocating screw is installed inside the transformer housing, and a reciprocating groove is provided on the reciprocating screw.

[0012] As a preferred technical solution, the height of the spiral groove is the same as the height of the reciprocating groove in the vertical direction, and the lowest points of the spiral groove and the reciprocating groove are at the same horizontal height.

[0013] As an optimal technical solution, a sleeve is provided at one end of the lifting plate, the sleeve is sleeved on the reciprocating screw rod, a ball bearing is provided on the inner wall of the sleeve, a plurality of mounting rings are evenly arranged on the lifting plate, the number of the mounting rings is consistent with the number of the insulating layers, a mounting strip is provided on the inner wall of the mounting ring, and the mounting strip is embedded in the mounting groove.

[0014] As an optimal technical solution, a plurality of high-voltage bushings and low-voltage bushings are provided on the top of the transformer housing, the insulating layer is electrically connected to the high-voltage bushing and the low-voltage bushing, and an oil drain valve is provided at the bottom of the transformer housing.

[0015] As an optimal technical solution, cooling components are provided on the front and rear sides of the transformer housing. The cooling components include two cooling pipes in the same vertical direction. Both cooling pipes are connected to the transition chamber. Several cooling blades are provided between the two transition chambers. The interior of the cooling blades is hollow.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the driving motor drives the reciprocating screw to rotate, the cooperation between the reciprocating groove and the ball bearing can make the lifting plate move up and down, thereby driving the detection ring on the lifting plate to perform a full range of detection on the insulation layer to avoid blind spots in monitoring;

[0018] 2. Due to the cooperation between the spiral groove and the upper limit post of the detection ring, the detection ring moves up and down along the insulation layer while rotating. Through the detection of the trigger, the damage condition of the insulation layer surface can be understood, and partial discharge can be prevented in advance;

[0019] 3. The up and down movement of the lifting plate will accelerate the flow rate of the oil inside the transformer. At the same time, when the detection ring rotates, it can also accelerate the circulation of oil near the insulation layer through the spoiler, thereby improving the cooling efficiency inside the transformer. When the lifting plate moves to the lowest point, the detection ring will also drive the spoiler to rotate to prevent the transformer oil from depositing at the bottom, further improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the cross-section structure of the main structure of the present invention;

[0022] Figure 3 Schematic diagram of the structure of the spoiler of the present invention;

[0023] Figure 4 Schematic diagram of the cross-section structure of the detection ring of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the lifting plate of the present invention;

[0025] Figure 6 It is a schematic diagram of the cross-section structure of the lifting plate of the present invention;

[0026] Figure 7 It is a cross-sectional schematic diagram of the detection ring of the present invention.

[0027] In the figure: 1. Transformer housing; 2. Iron core; 3. Insulation layer; 4. Detection ring; 5. Drive motor; 6. Reciprocating screw; 7. Lifting plate; 8. Cooling assembly;

[0028] 11. High-pressure bushing; 12. Low-pressure bushing; 13. Oil drain valve; 31. Spiral groove; 32. Spoiler; 41. Groove; 42. Brush; 43. Drive plate; 44. Mounting groove; 45. Accommodation groove; 46. Detection element; 47. Limiting column; 61. Reciprocating groove; 71. Sleeve; 72. Mounting ring; 81. Cooling pipe; 82. Transition chamber; 83. Cooling blades;

[0029] 3201, blade; 3202, annular groove; 3203, drive groove; 4101, spoiler; 4501, actuator; 4502, stopper; 4503, spring; 7101, ball bearing; 7201, mounting strip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example: Figure 1-Figure 7 As shown, the present invention provides a technical solution, which includes a transformer partial discharge detection device with a multi-position detection structure, comprising a transformer shell 1, an iron core 2 installed in the transformer shell 1, a plurality of insulating layers 3 installed on the iron core 2, a detection ring 4 slidably installed outside the insulating layer 3, a drive motor 5 installed on the top of the transformer shell 1, a reciprocating screw 6 installed on the output shaft of the drive motor 5, a lifting plate 7 slidably installed on the reciprocating screw 6, and the detection ring 4 is fixed on the lifting plate 7; the iron core 2 is fixedly installed in the transformer shell 1, and the iron core includes two parts arranged in the horizontal and vertical directions. The winding coil is sleeved on the iron core arranged in the vertical direction and is wrapped by the insulating layer 3, so that the detection ring 4 can perform all-round detection of the internal winding coil when it moves on the surface of the insulating layer 3; the drive motor 5 is fixedly installed on the top of the transformer shell 1, and the output end of the drive motor 5 is connected to the reciprocating screw 6, the reciprocating screw 6 is fixed inside the transformer shell 1, and the length of the reciprocating screw 6 is consistent with the height of the transformer shell 1.

[0032] A spiral groove 31 is provided on the outer wall of the insulating layer 3, and a spoiler 32 is rotatably installed at the bottom of the insulating layer 3. The diameter of the spoiler 32 is larger than the diameter of the insulating layer 3. A blade 3201 is provided on the outer wall of the spoiler 32, and an annular groove 3202 is provided on the top of the spoiler 32. A driving groove 3203 is provided on the side wall of the annular groove 3202. The distance from the lowest point of the spiral groove 31 to the bottom of the insulating layer 3 is exactly half the height of the detection ring 4. Similarly, the distance from the highest point of the spiral groove 31 to the top of the insulating layer 3 is also half the height of the detection ring 4. By limiting the starting and ending positions of the spiral groove 31, it can be ensured that the insulating layer 3 is always within the detection range of the detection ring 4. The driving groove 3203 is composed of an arc portion and a vertical portion. The inclination direction of the arc portion is opposite to the inclination direction of the blade 3201. Therefore, when the spoiler 32 rotates, an upward lift can be generated under the action of the blade 3201, pushing the transformer oil at the bottom of the transformer to rise.

[0033] Grooves 41 are provided on the upper and lower end surfaces of the detection ring 4, and spoiler sheets 4101 are arranged at equal intervals in the grooves 41. The spoiler sheets 4101 are arranged at an angle, and the inclination directions of the spoiler sheets 4101 arranged on the upper and lower end surfaces are opposite. Brushes 42 are provided on the upper and lower sides of the inner wall of the detection ring 4, and a driving plate 43 is provided at the bottom of the detection ring 4. Two driving blocks 4301 are symmetrically provided on the inner wall of the driving plate 43, and an installation groove 44 is provided on the outer wall of the detection ring 4.

[0034] The inner wall of the detection ring 4 is evenly provided with a accommodating groove 45, and a touch piece 4501 is installed in the accommodating groove 45. A stopper 4502 is provided in the middle of the touch piece 4501, and a spring 4503 is fixedly connected to the bottom of the stopper 4502. A plurality of detection pieces 46 are evenly arranged on the inner wall of the detection ring 4, wherein a limiting column 47 is provided between two trigger pieces 4501; when the detection ring 4 moves upward, with the cooperation of the limiting column 47 and the spiral groove 31, the detection ring 4 starts to rotate clockwise. At this time, the spoiler 4101 located at the top of the detection ring 4 continuously stirs the surrounding transformer oil, accelerates the flow rate of the nearby transformer oil, thereby accelerating the heat dissipation efficiency of the insulation layer. Similarly, when the detection ring 4 moves downward, the detection ring 4 will rotate counterclockwise. At this time, the spoiler 4101 at the bottom of the detection ring 4 continuously stirs the transformer oil below, accelerates the circulation of the transformer oil at the bottom of the detection ring 4, and thereby optimizes the heat dissipation effect of the insulation layer. The detection piece 46 is a sensor that can detect partial discharge phenomena.

[0035] The driving groove 3203 includes an arc portion and a straight portion. The angle formed by the arc portion is 90 degrees. The straight portion is arranged in the vertical direction, and the length of the straight portion is equal to the height of the driving plate 43. When the lifting plate 7 drives the detection ring 4 to move continuously downward, the driving plate 43 will be inserted into the annular groove 3202. At the same time, the driving block 4301 on the driving plate 43 begins to enter the arc portion of the driving groove 3203. As the detection ring 4 continues to move downward, the driving block 4301 moves along the arc portion of the driving groove 3203. Since the arc portion of the driving groove 3203 continues to decrease in height in the counterclockwise direction, the spoiler 32 will be driven to rotate in the clockwise direction during the downward pressure of the detection ring 4. ; During the rotation of the spoiler 32, the blades continuously stir the transformer oil deposited at the bottom and generate a lift on the transformer oil, forcing the transformer oil at the bottom to flow upward, accelerating the flow rate of the transformer oil, and thereby improving the heat dissipation efficiency in the transformer; when the driving block 4301 moves to the lowest point of the arc portion of the driving groove 3203, the spoiler 32 stops rotating. At this time, the detection ring 4 has also dropped to the lowest point. When the driving motor 5 continues to work, the detection ring 4 starts to move upward under the drive of the lifting plate 7, and the driving block 4301 starts to leave the arc portion and enter the straight portion of the driving groove 3203 until the driving block 4301 completely leaves the straight portion of the driving groove 3203.

[0036] The driving motor 5 is fixedly mounted on the top of the transformer housing 1, and the reciprocating screw 6 is mounted inside the transformer housing 1. The reciprocating screw 6 is provided with a reciprocating groove 61. The reciprocating grooves 61 are staggered, and the first connected grooves can realize the up and down movement of the lifting plate 7 along the reciprocating screw only by the unidirectional rotation of the reciprocating screw 6. The height of the spiral groove 31 is the same as the height of the reciprocating groove 61 in the vertical direction, and the lowest points of the spiral groove 31 and the reciprocating groove 61 are at the same horizontal height. When the top of the detection ring 4 is at the same height as the top of the insulating layer 3, the lifting plate 7 can be moved up and down along the reciprocating screw. When the bottom of the detection ring 4 and the bottom of the insulating layer 3 are at the same height, the lifting plate 7 moves to the lowest point of the reciprocating groove 61. When the driving motor 5 continues to rotate the reciprocating screw 6, the lifting plate 7 starts to rise. By restricting the spiral groove 31 and the reciprocating groove 61, it can be ensured that the detection ring 4 always surrounds the surface of the insulating layer 3, and will not affect the detection result of the trigger 4501.

[0037] A sleeve 71 is provided at one end of the lifting plate 7, and the sleeve 71 is sleeved on the reciprocating screw rod 6. A ball bearing 7101 is provided on the inner wall of the sleeve 71. A plurality of mounting rings 72 are evenly arranged on the lifting plate 7. The number of mounting rings 72 is consistent with the number of insulating layers 3. A mounting strip 7201 is provided on the inner wall of the mounting ring 72. The mounting strip 7201 is embedded in the mounting groove 44. A detection ring 4 is installed in each mounting ring 72. The detection ring 4 can be fixed to the lifting plate 7 by matching the mounting strip 7201 with the mounting groove 44 on the outer wall of the detection ring 4. The sleeve 71 is sleeved on the reciprocating screw rod 6, and the ball bearing 7101 is provided on the inner wall of the sleeve 71. 7101 is embedded in the reciprocating groove 61. As the lifting plate 7 moves vertically under the drive of the reciprocating screw 6, the up and down movement of the lifting plate 7 inside the transformer can help promote the flow of transformer oil inside the transformer. In particular, through the cooperation of the spoiler 4501 and the spoiler 32, the oil can be prevented from stagnating for a long time at the bottom of the transformer and the accumulation of oil at the bottom of the transformer. This is very important for accurately detecting the health status of the transformer. If the flow rate of the transformer oil is insufficient, hot spots or sediments may be formed near the insulating layer 3 or the detection member 46. These conditions may Interference with the detection results leads to misjudgment of the actual operating condition of the transformer; on the other hand, the up and down movement of the lifting plate 7 squeezes the oil inside the transformer, thereby helping to promote oil circulation, thereby enhancing the cooling efficiency of the transformer, because the oil flow promotes a more even distribution of heat from the heat source of the transformer to the entire transformer, which can reduce local overheating, extend the service life of the transformer, and reduce maintenance costs. At the same time, it also increases the flow rate of the transformer oil, improves the heat exchange efficiency inside the transformer, and greatly improves the heat dissipation efficiency of the transformer; when the lifting plate 7 moves up and down, the surface of the lifting plate 7 drives part of the transformer oil to move synchronously, accelerating the flow rate of this part of the transformer oil, thereby increasing the heat exchange rate near the insulating layer 3; and when the detection ring 4 moves upward, the detection ring 4 rotates clockwise, thereby driving the spoiler 42 at the top to stir the transformer oil, further accelerating the flow rate of the transformer oil near the insulating layer 3. Since the spoilers 42 at the upper and lower ends of the detection ring 4 are inclined in opposite directions, when the detection ring 4 moves downward, the detection ring 4 rotates counterclockwise, and the spoiler 42 at the bottom also stirs the transformer oil, ultimately improving the cooling efficiency inside the transformer.

[0038] A plurality of high-voltage bushings 11 and low-voltage bushings 12 are provided on the top of the transformer housing 1, and an oil drain valve 13 is provided at the bottom of the transformer housing 1; the insulating layer 3 inside the transformer is connected to the high-voltage bushing 11 and the low-voltage bushing 12 at the same time; a cooling assembly 8 is provided on the front and rear sides of the transformer housing 1, and the cooling assembly 8 includes two cooling pipes 81 in the same vertical direction, each cooling pipe 81 is connected to a transition chamber 82, and a plurality of cooling blades 83 are provided between the two transition chambers 82. The hollow interior of the cooling blades 83 can accelerate the cooling rate of the transformer oil through the installed cooling assembly 8. The transformer oil first leaves the transformer housing 1 through the cooling pipe 81 located above, and then enters the transition chamber 82, and the transformer oil is evenly distributed to each cooling blade 83, thereby increasing the contact area between the transformer oil and the air, greatly improving the cooling rate of the transformer oil, and finally flows back into the transformer through the cooling pipe 81 located below, ensuring that the transformer has good heat dissipation performance.

[0039] Working principle of the present invention:

[0040] After starting the driving motor 5, the reciprocating screw 6 is driven to rotate through the output end of the driving motor 5. Due to the cooperation between the reciprocating groove 61 on the reciprocating screw 6 and the ball 7101, the lifting plate 7 can be driven to move up and down along the reciprocating screw 6, and the detection ring 4 is fixed on the lifting plate 7 through the mounting groove 44. The lifting plate 7 will drive the detection ring 4 to move up and down along the insulating layer 3, and finally make the detection range of the detection part 46 installed on the inner wall of the detection ring 4 cover the entire surface of the insulating layer 3, ensuring the detection range.

[0041] Due to the cooperation between the limiting column 47 on the inner wall of the detection ring 4 and the spiral groove 31 on the surface of the insulating layer 3, the detection ring 4 will rotate while rising and falling. The surface of the insulating layer 3 is continuously scanned by multiple detection parts 46, which can accurately detect the specific location where partial discharge occurs, thereby ensuring the accuracy of detection.

[0042] At the same time, as the detection ring 4 rotates continuously, the touch piece 4501 on the inner wall will also detect the surface of the insulating layer. When local discharge occurs, the insulating layer 3 is prone to damage. Since a depression will appear in the damaged area, when the touch piece 4501 passes through the damaged position, the touch piece 4501 will pop out, and the micro switch provided at the bottom of the accommodating groove 45 detects the displacement of the touch piece 4501, thereby detecting that a local discharge has occurred here, which can remind the staff to deal with it in time and prevent the serious consequences that may be caused by local discharge in advance; brushes 42 are also provided on the upper and lower sides of the touch piece 4501. Before the touch piece 4501 is tested, foreign matter on the surface of the insulating layer can be removed by the brush 42 to prevent foreign matter from affecting the detection result of the touch piece 4501.

[0043] On the other hand, when the lifting plate 7 moves up and down, the surface of the lifting plate 7 will drive part of the transformer oil to move synchronously, accelerating the flow rate of this part of the transformer oil, thereby increasing the heat exchange rate near the insulating layer 3; and when the detection ring 4 moves upward, the detection ring 4 rotates clockwise, thereby driving the spoiler 42 at the top to stir the transformer oil, further accelerating the flow rate of the transformer oil near the insulating layer 3. Since the spoilers 42 at the upper and lower ends of the detection ring 4 are inclined in opposite directions, when the detection ring 4 moves downward, the detection ring 4 rotates counterclockwise, and the spoiler 42 at the bottom will also stir the transformer oil, ultimately improving the cooling efficiency inside the transformer.

[0044] A spoiler 32 is provided at the bottom of the insulating layer 3. When the lifting plate 7 drives the detection ring 4 to move to the lowest point, the driving plate 43 at the bottom of the detection ring 4 is inserted into the annular groove 3202 of the spoiler 32, and the driving block 4301 on the driving plate 43 is just embedded in the driving groove 3203. The driving groove 3203 is composed of an arc segment and a vertical segment. When the driving plate 43 is inserted into the driving groove 3203, the driving block 4301 first enters the arc segment. When the lifting plate 7 continues to descend, the arc segment and the driving block 4301 cooperate to drive the spoiler 32 to rotate. Through the rotation of the spoiler 32, the oil deposited at the bottom of the transformer can be pushed upward. Since the transformer oil accumulates at the bottom, it may cover up or hide potential fault phenomena, making detection and maintenance work more difficult. Therefore, stirring the transformer oil at the bottom by the spoiler 32 can not only speed up the circulation efficiency of the transformer oil, but also improve the maintenance efficiency.

[0045] The installed cooling assembly 8 can accelerate the cooling speed of the transformer oil. The transformer oil first leaves the transformer housing 1 through the cooling pipe 81 located at the top, and then enters the transition chamber 82, where the transformer oil is evenly distributed to each cooling blade 83, thereby increasing the contact area between the transformer oil and the air and greatly improving the cooling speed of the transformer oil. Finally, the transformer oil flows back into the transformer through the cooling pipe 81 located at the bottom, ensuring that the transformer has good heat dissipation performance.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention; therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention; any figure signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A transformer partial discharge detection device with a multi-position detection structure, characterized in that: The transformer partial discharge detection device with a multi-position detection structure comprises a transformer housing (1), an iron core (2) is installed in the transformer housing (1), a plurality of insulating layers (3) are installed on the iron core (2), a detection ring (4) is slidably installed outside the insulating layer (3), a driving motor (5) is installed on the top of the transformer housing (1), a reciprocating screw (6) is installed on the output shaft of the driving motor (5), a lifting plate (7) is slidably installed on the reciprocating screw (6), and the detection ring (4) is fixed on the lifting plate (7).

2. A transformer partial discharge detection device with a multi-bit detection structure according to claim 1, characterized in that: The outer wall of the insulating layer (3) is provided with a spiral groove (31), the bottom of the insulating layer (3) is rotatably mounted with a spoiler (32), the diameter of the spoiler (32) is larger than the diameter of the insulating layer (3), the outer wall of the spoiler (32) is provided with blades (3201), the top of the spoiler (32) is provided with an annular groove (3202), and the side wall of the annular groove (3202) is provided with a driving groove (3203).

3. A transformer partial discharge detection device with a multi-bit detection structure according to claim 2, characterized in that: The detection ring (4) is provided with grooves (41) on both upper and lower end surfaces, and spoiler sheets (4101) are arranged at equal intervals in the grooves (41). The spoiler sheets (4101) are arranged obliquely, and the spoiler sheets (4101) arranged on the upper and lower end surfaces have opposite oblique directions. Brushes (42) are provided on the upper and lower sides of the inner wall of the detection ring (4). A driving plate (43) is provided at the bottom of the detection ring (4), and two driving blocks (4301) are symmetrically provided on the inner wall of the driving plate (43). The outer wall of the detection ring (4) is provided with a mounting groove (44). The inner wall of the detection ring (4) is evenly provided with a receiving groove (45), a touch piece (4501) is installed in the receiving groove (45), a stopper (4502) is provided in the middle of the touch piece (4501), and a spring (4503) is fixedly connected to the bottom of the stopper (4502), and a plurality of detection pieces (46) are evenly provided on the inner wall of the detection ring (4), wherein a limiting column (47) is provided between two of the touch pieces (4501).

4. A transformer partial discharge detection device with a multi-bit detection structure according to claim 3, characterized in that: The driving groove (3203) comprises an arc portion and a straight portion, the angle formed by the arc portion is 90 degrees, the straight portion is arranged in a vertical direction, and the length of the straight portion is equal to the height of the driving plate (43).

5. A transformer partial discharge detection device with a multi-bit detection structure according to claim 4, characterized in that: The driving motor (5) is fixedly mounted on the top of the transformer housing (1), the reciprocating screw rod (6) is mounted inside the transformer housing (1), and a reciprocating groove (61) is provided on the reciprocating screw rod (6).

6. A transformer partial discharge detection device with a multi-bit detection structure according to claim 5, characterized in that: The height of the spiral groove (31) is the same as the height of the reciprocating groove (61) in the vertical direction, and the lowest points of the spiral groove (31) and the reciprocating groove (61) are at the same horizontal height.

7. A transformer partial discharge detection device with a multi-position detection structure according to claim 6, characterized in that: A sleeve (71) is provided at one end of the lifting plate (7), and the sleeve (71) is sleeved on the reciprocating screw rod (6). A ball (7101) is provided on the inner wall of the sleeve (71). A plurality of mounting rings (72) are evenly arranged on the lifting plate (7), and the number of the mounting rings (72) is consistent with the number of the insulating layers (3). A mounting strip (7201) is provided on the inner wall of the mounting ring (72), and the mounting strip (7201) is embedded in the mounting groove (44).

8. A transformer partial discharge detection device with a multi-position detection structure according to claim 1, characterized in that: A plurality of high-voltage bushings (11) and low-voltage bushings (12) are provided on the top of the transformer housing (1); the insulating layer (3) is electrically connected to the high-voltage bushings (11) and the low-voltage bushings (12); and an oil drain valve (13) is provided on the bottom of the transformer housing (1).

9. A transformer partial discharge detection device with a multi-bit detection structure according to claim 1, characterized in that: The transformer housing (1) is provided with cooling assemblies (8) on both the front and rear sides. The cooling assemblies (8) include two cooling pipes (81) in the same vertical direction. Both cooling pipes (81) are connected to a transition chamber (82). A plurality of cooling blades (83) are provided between the two transition chambers (82). The interiors of the cooling blades (83) are hollow.

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