A power transformer with an auxiliary maintenance function and its maintenance method

Abstract

The present invention discloses a power transformer with an auxiliary maintenance function and its maintenance method, including a transformer, a bearing plate and a flaw detection assembly. A base is provided below the transformer, and a lead screw base and a second motor are provided above the transformer. The output end of the second motor passes through the lead screw base and is rotatably connected to a second lead screw, specifically relating to the technical field of power transformer maintenance. For the power transformer with an auxiliary maintenance function and its maintenance method, due to the provision of a movable flaw detection assembly, ultrasonic flaw detectors can be used to detect cracks inside the transformer, so as to avoid cracks in the coil module inside the transformer affecting the voltage transformation effect of the power transformer and even causing problems such as charge breakdown of the power transformer resulting in damage to the transformer. At the same time, the Faraday cage can shield high-intensity current and high potential differences, avoiding the problem of the ultrasonic flaw detector failing due to interference caused by electromagnetic induction.

Description

Technical Field

[0001] The invention belongs to the technical field of power transformer maintenance, and particularly relates to a power transformer with auxiliary maintenance functions and an overhaul method thereof. Background Technique

[0002] A transformer is a static electrical device used to transform AC voltage and current and transmit AC electrical energy. It realizes the transmission of electrical energy based on the principle of electromagnetic induction. Transformers can be classified into power transformers, test transformers, instrument transformers, and transformers for special purposes according to their uses: power transformers are necessary equipment for power transmission and distribution and power user distribution; test transformers are equipment for performing withstand voltage (boosting voltage) tests on electrical equipment; instrument transformers are used for electrical measurement and relay protection in the power distribution system (PT, CT); special-purpose transformers include electric furnace transformers for smelting, welding transformers, rectifier transformers for electrolysis, small voltage regulating transformers, etc.

[0003] When existing power transformers are being repaired, generally only inspections are carried out on the electrical connection lines, coil modules, input and output voltages, etc. of the power transformers, lacking crack detection operations on the components of the power transformers. If cracks occur in the coil modules inside the power transformers, it will affect the voltage transformation effect of the power transformers, and even cause problems such as charge breakdown of the power transformers, resulting in damage to the transformers. Summary of the Invention

[0004] The purpose of the invention is to provide a power transformer with auxiliary maintenance functions and an overhaul method thereof to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the invention provides the following technical solution: A power transformer with auxiliary maintenance functions and an overhaul method thereof, including a transformer, a bearing plate, and a flaw detection component. A base is arranged below the transformer, the base is hinged to the bearing plate through a hinge, a lead screw seat and a second motor are arranged above the transformer, the output end of the second motor passes through the lead screw seat and is rotationally connected to a second lead screw, a lead screw sleeve is sleeved on the outer circumferential wall of the second lead screw, the flaw detection component includes a suspension rod, a Faraday cage, and an ultrasonic flaw detector. The side wall of the lead screw sleeve is connected to the Faraday cage through the suspension rod, and the ultrasonic flaw detector is arranged inside the Faraday cage.

[0006] Preferably, a sliding frame is arranged inside the base, a first motor is arranged on the side of the sliding frame, a bearing seat is installed on the surface of the sliding frame, the output end of the first motor passes through the sliding frame and is rotationally connected to a first lead screw, the end of the first lead screw away from the first motor is rotationally connected to the bearing seat through a bearing, a lead screw cylinder is sleeved on the outer circumferential wall of the first lead screw, a sliding rod adapted to the sliding frame is installed on the side wall of the lead screw cylinder, and the end of the sliding rod away from the lead screw cylinder is fixedly connected to the hinge.

[0007] Preferably, a third motor is installed on the side wall of the transformer. The output end of the third motor is rotatably connected to a wheel disc. A connecting belt is wound around the surface of the wheel disc. A connecting block is installed on the side wall of the bearing plate. One end of the connecting belt away from the wheel disc is connected to the connecting block.

[0008] Preferably, a side rod is installed on the side wall of the suspension rod. Hoisting rings are installed on the side walls of the Faraday cage and the side rod. The two hoisting rings are connected by a tension spring.

[0009] Preferably, a sliding plate is installed on the end wall of the suspension rod. The sliding plate is movably connected to the Faraday cage.

[0010] Preferably, a cylinder is installed on the end wall of the sliding plate. The output end of the cylinder is installed with a connecting frame.

[0011] Preferably, a jack is provided inside the connecting frame. A plug rod is arranged on the side of the ultrasonic flaw detector. The jack is adapted to the plug rod.

[0012] Preferably, a motor cover is sleeved outside the first motor.

[0013] Preferably, reinforcing ribs are installed inside the suspension rod.

[0014] Preferably, the overhaul method is as follows:

[0015] The first step: Drive the first motor to drive the first lead screw to rotate. The first lead screw drives the lead screw barrel to move along the axial direction of the first lead screw. The sliding rod is driven by the lead screw barrel to move along the axial direction of the first lead screw.

[0016] The second step: Drive the third motor to drive the wheel disc to move. The wheel disc releases the connecting belt. The bearing plate is placed in a horizontal position.

[0017] The third step: Drive the second motor to drive the second lead screw to rotate. The second lead screw drives the lead screw sleeve to move along the axial direction of the second lead screw. The suspension rod drives the Faraday cage and the ultrasonic flaw detector to move along the axial direction of the second lead screw. The ultrasonic flaw detector performs crack detection operations on the transformer.

[0018] The fourth step: Personnel stand on the bearing plate to perform overhaul operations on the transformer.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The power transformer with auxiliary maintenance function and its maintenance method are provided with a movable flaw detection component. The ultrasonic flaw detector can be used to detect cracks inside the transformer, so as to avoid the problem that cracks in the coil module inside the transformer affect the voltage transformation effect of the power transformer and even cause the transformer to be damaged due to charge breakdown of the power transformer. At the same time, the Faraday cage can shield high-intensity current and high potential difference, avoiding the problem that the ultrasonic flaw detector fails due to interference caused by electromagnetic induction.

[0021] (2) The power transformer with auxiliary maintenance function and its maintenance method are provided with a bearing plate. When personnel carry out auxiliary maintenance work on the transformer, they can directly stand on the bearing plate without using additional climbing equipment such as ladders for maintenance, making the maintenance more convenient and further improving the maintenance efficiency of the transformer.

[0022] (3) The power transformer with auxiliary maintenance function and its maintenance method set the bearing plate as a retractable structure. When using the bearing plate, the storage or release operation of the bearing plate can be realized by driving the connecting belt to rotate through the disc, making the use of the bearing plate more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a rear view of the present invention;

[0025] Figure 3 is a schematic structural diagram of the flaw detection component of the present invention;

[0026] Figure 4 is a schematic structural diagram of the base of the present invention;

[0027] Figure 5 is a schematic structural diagram of the slide bar of the present invention;

[0028] Figure 6 is a schematic structural diagram of the lead screw seat of the present invention;

[0029] Figure 7 is a schematic structural diagram of the insertion rod and the insertion hole of the present invention;

[0030] Figure 8 is a schematic exploded structural diagram of the Faraday cage of the present invention;

[0031] Figure 9 is a schematic structural diagram of the disc of the present invention;

[0032] In the figure: 1. Transformer; 2. Bearing plate; 3. Flaw detection assembly; 31. Suspension rod; 32. Side rod; 33. Suspension ring; 34. Faraday cage; 35. Tension spring; 36. Slide plate; 4. Base; 41. Slide carriage; 42. Motor cover; 43. Hinge; 44. Connecting block; 5. First motor; 51. First lead screw; 52. Lead screw cylinder; 53. Slide bar; 54. Bearing block; 6. Second motor; 61. Lead screw seat; 62. Second lead screw; 63. Lead screw sleeve; 7. Ultrasonic flaw detector; 8. Cylinder; 81. Connecting frame; 82. Jack; 83. Plug rod; 9. Third motor; 91. Disk; 92. Connecting belt. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 9As shown in the figure, the present invention provides the following technical solution: a power transformer with an auxiliary maintenance function and its maintenance method, including a transformer 1, a bearing plate 2, and a flaw detection component 3. A base 4 is arranged below the transformer 1. The base 4 is hinged to the bearing plate 2 through a hinge 43. A lead screw seat 61 and a second motor 6 are arranged above the transformer 1. The output end of the second motor 6 passes through the lead screw seat 61 and is rotatably connected to a second lead screw 62. A lead screw sleeve 63 is sleeved on the outer circumferential wall of the second lead screw 62. The flaw detection component 3 includes a suspension rod 31, a Faraday cage 34, and an ultrasonic flaw detector 7. The side wall of the lead screw sleeve 63 is connected to the Faraday cage 34 through the suspension rod 31. The ultrasonic flaw detector 7 is arranged inside the Faraday cage 34. A sliding frame 41 is arranged inside the base 4. A first motor 5 is arranged on the side of the sliding frame 41. A bearing seat 54 is installed on the surface of the sliding frame 41. The output end of the first motor 5 passes through the sliding frame 41 and is rotatably connected to a first lead screw 51. One end of the first lead screw 51 away from the first motor 5 is rotatably connected to the bearing seat 54 through a bearing. A lead screw cylinder 52 is sleeved on the outer circumferential wall of the first lead screw 51. A sliding rod 53 adapted to the sliding frame 41 is installed on the side wall of the lead screw cylinder 52. One end of the sliding rod 53 away from the lead screw cylinder 52 is fixedly connected to the hinge 43. A third motor 9 is installed on the side wall of the transformer 1. The output end of the third motor 9 is rotatably connected to a wheel disc 91. A connecting belt 92 is wound on the surface of the wheel disc 91. A connecting block 44 is installed on the side wall of the bearing plate 2. One end of the connecting belt 92 away from the wheel disc 91 is connected to the connecting block 44. A side rod 32 is installed on the side wall of the suspension rod 31. Suspension rings 33 are installed on the side walls of the Faraday cage 34 and the side rod 32. The two suspension rings 33 are connected by a tension spring 35. A sliding plate 36 is installed on the end wall of the suspension rod 31. The sliding plate 36 is movably connected to the Faraday cage 34. A cylinder 8 is installed on the end wall of the sliding plate 36. The output end of the cylinder 8 is installed with a connecting frame 81. A jack 82 is opened inside the connecting frame 81. A plug rod 83 is arranged on the side of the ultrasonic flaw detector 7. The jack 82 is adapted to the plug rod 83. A motor cover 42 is sleeved outside the first motor 5. A reinforcing rib 37 is installed inside the suspension rod 31. The maintenance method is as follows: First step: Drive the first motor 5 to drive the first lead screw 51 to rotate. The first lead screw 51 drives the lead screw cylinder 52 to move axially along the first lead screw 51. The sliding rod 53 is driven by the lead screw cylinder 52 to move axially along the first lead screw 51. Second step: Drive the third motor 9 to drive the wheel disc 91 to move. The wheel disc 91 releases the connecting belt 92, and the bearing plate 2 is placed in a horizontal position. Third step: Drive the second motor 6 to drive the second lead screw 62 to rotate. The second lead screw 62 drives the lead screw sleeve 63 to move axially along the second lead screw 62. The suspension rod 31 drives the Faraday cage 34 and the ultrasonic flaw detector 7 to move axially along the second lead screw 62. The ultrasonic flaw detector 7 performs crack detection operations on the transformer 1. Fourth step: Personnel stand on the bearing plate 2 to perform maintenance operations on the transformer 1. Since there is a movable flaw detection component 3, the ultrasonic flaw detector 7 can detect cracks inside the transformer 1.To avoid the problem that cracks occur in the coil module inside the transformer 1, affecting the voltage transformation effect of the power transformer, and even causing charge breakdown of the power transformer, resulting in damage to the transformer 1. At the same time, the Faraday cage 34 can shield high-intensity current and high potential difference, avoiding the problem that the ultrasonic flaw detector 7 fails due to the interference caused by electromagnetic induction.

[0035] During operation, first drive the first motor 5 to work, causing the first lead screw 51 to rotate. During the rotation of the first lead screw 51, the lead screw cylinder 52 will move along the axial direction of the first lead screw 51. As a result, the hinge 43 and the carrier plate 2 will move along the axial direction of the first lead screw 51 together with the lead screw cylinder 52 and the slide bar 53. At the same time, drive the third motor 9 to work, causing the third motor 9 to drive the wheel disc 91 to move. The wheel disc 91 then releases the connecting belt 92. During this process, on the one hand, by adjusting the distance between the carrier plate 2 and the transformer 1, and on the other hand, by adjusting the angle of the carrier plate 2, the free adjustment operation of the carrier plate 2 can be realized, thereby adjusting the position of the operator and facilitating the work of the operator standing for maintenance.

[0036] At the same time, by driving the second motor 6 to drive the second lead screw 62 to move, the suspension rod 31, the Faraday cage 34, and the ultrasonic flaw detector 7 move on the side of the transformer 1, enabling flaw detection operations on components such as the coil module inside the transformer 1, solving the problem of damage to components that cannot be seen on the surface, and further eliminating potential hazards.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power transformer with an auxiliary maintenance function, characterized in that: It includes a transformer (1), a carrier plate (2) and a flaw detection assembly (3). A base (4) is provided below the transformer (1), and the base (4) is hinged to the carrier plate (2) through a hinge (43). Above the transformer (1), a lead screw seat (61) and a second motor (6) are provided. The output end of the second motor (6) passes through the lead screw seat (61) and is rotationally connected to a second lead screw (62). A lead screw sleeve (63) is sleeved on the outer circumferential wall of the second lead screw (62). The flaw detection assembly (3) includes a suspension rod (31), a Faraday cage (34) and an ultrasonic flaw detector (7). The side wall of the lead screw sleeve (63) is connected to the Faraday cage (34) through the suspension rod (31), and the ultrasonic flaw detector (7) is arranged inside the Faraday cage (34).

2. The power transformer with an auxiliary maintenance function according to claim 1, wherein: Inside the base (4), a sliding frame (41) is provided. A first motor (5) is provided on the side of the sliding frame (41). A bearing seat (54) is installed on the surface of the sliding frame (41). The output end of the first motor (5) passes through the sliding frame (41) and is rotationally connected to a first lead screw (51). One end of the first lead screw (51) away from the first motor (5) is rotationally connected to the bearing seat (54) through a bearing. A lead screw cylinder (52) is sleeved on the outer circumferential wall of the first lead screw (51). A sliding rod (53) adapted to the sliding frame (41) is installed on the side wall of the lead screw cylinder (52). One end of the sliding rod (53) away from the lead screw cylinder (52) is fixedly connected to the hinge (43).

3. The power transformer with an auxiliary maintenance function according to claim 2, wherein: A third motor (9) is installed on the side wall of the transformer (1). The output end of the third motor (9) is rotationally connected to a wheel disc (91). A connecting belt (92) is wound on the surface of the wheel disc (91). A connecting block (44) is installed on the side wall of the carrier plate (2), and one end of the connecting belt (92) away from the wheel disc (91) is connected to the connecting block (44).

4. The power transformer with an auxiliary maintenance function according to claim 3, characterized in that: A side rod (32) is installed on the side wall of the suspension rod (31). Hoop rings (33) are installed on the side walls of the Faraday cage (34) and the side rod (32), and the two hoop rings (33) are connected by a tension spring (35).

5. A power transformer with an auxiliary maintenance function according to claim 4, characterized in that: A sliding plate (36) is installed on the end wall of the suspension rod (31), and the sliding plate (36) is movably connected to the Faraday cage (34).

6. The power transformer with an auxiliary maintenance function according to claim 5, characterized in that: A cylinder (8) is installed on the end wall of the sliding plate (36), and an output end of the cylinder (8) is installed with a connecting frame (81).

7. The power transformer with an auxiliary maintenance function according to claim 6, characterized in that: An insertion hole (82) is formed inside the connecting frame (81). A plug rod (83) is provided on the side of the ultrasonic flaw detector (7), and the insertion hole (82) is adapted to the plug rod (83).

8. The power transformer with an auxiliary maintenance function according to claim 7, characterized in that: A motor cover (42) is sleeved outside the first motor (5).

9. The power transformer with an auxiliary maintenance function according to claim 8, wherein: Reinforcing ribs (37) are installed inside the suspension rod (31).

10. A maintenance method for a power transformer with an auxiliary maintenance function according to claim 9, characterized in that: The maintenance method is as follows: Step 1: Drive the first motor (5) to drive the first lead screw (51) to rotate. The first lead screw (51) drives the lead screw cylinder (52) to move axially along the first lead screw (51), and the sliding rod (53) is driven by the lead screw cylinder (52) to move axially along the first lead screw (51). Step 2: Drive the third motor (9) to drive the disk (91) to move. The disk (91) releases the connecting belt (92), and the bearing plate (2) is placed in the horizontal position; Step 3: Drive the second motor (6) to drive the second lead screw (62) to rotate. The second lead screw (62) drives the lead screw sleeve (63) to move along the axial direction of the second lead screw (62). The hanging rod (31) drives the Faraday cage (34) and the ultrasonic flaw detector (7) to move along the axial direction of the second lead screw (62), and the ultrasonic flaw detector (7) performs crack detection operations on the transformer (1); Step 4: Personnel stand on the bearing plate (2) to perform maintenance operations on the transformer (1).

Images