A testing tool for transformer and rectifier

Abstract

The present invention provides a detection tool for a transformer and a rectifier, comprising a scissor lift, wherein a top seat and a base are provided on the scissor lift, a first rotating shaft is movably provided on the upper surface of the top seat, a rotating seat is fixed on the first rotating shaft, a trapezoidal slide groove is provided on the rotating seat, a trapezoidal slide bar is slidably provided inside the trapezoidal slide groove, the trapezoidal slide bar is slidably connected to the trapezoidal slide groove, a second rotating shaft is provided above the trapezoidal slide bar, the bottom of the second rotating shaft is slidably connected to the trapezoidal slide bar, an extension rod is fixed on the second rotating shaft, and a partial discharge detection mechanism and a visual detection mechanism are arranged at intervals on the extension rod. The present invention solves the problem in the prior art that workers are usually driven by an aerial lift to move to the vicinity of the transformer, and then use handheld detection tools to perform all-round detection on it, which is very inconvenient and has certain risks.

Description

Technical Field

[0001] The invention relates to the field of transformers, and in particular to a detection tool for transformers and rectifiers. Background Art

[0002] Power transformers and rectifiers are hub equipment for power transmission and transformation in power systems. They are key equipment for electric energy conversion and play an important role in power grids. The reliability of their operation is directly related to the safety and stability of the power system. During maintenance, they need to be tested and analyzed for partial discharge, and the appearance of the transformer needs to be inspected, such as whether the porcelain bushing is damaged, whether the connecting bolts of each part are firm, whether there is oil leakage at each interface, whether there is mechanical damage and rust on the surface, and whether the paint is intact.

[0003] In the prior art, when inspecting a transformer or rectifier installed in a higher area (such as a transformer installed between two electric poles), workers are usually moved to the vicinity of the transformer by an aerial lift, and then handheld inspection tools are used to perform a full-scale inspection on it, which is very inconvenient (the length of a person's arm is limited and cannot be inspected in all directions) and has certain risks (too close to the transformer body).

[0004] Therefore, it is necessary to provide a new transformer and rectifier detection tool to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a detection tool for transformers and rectifiers, which solves the problem that in the prior art, workers are usually moved to the vicinity of the transformer by an aerial lift, and then hand-held detection tools are used to perform all-round inspections on it, which is very inconvenient and has certain risks.

[0006] The detection tooling for transformers and rectifiers provided by the present invention comprises a scissor lift, wherein the scissor lift is provided with a top seat and a base, wherein a first rotating shaft is movably provided on the upper surface of the top seat, a rotating seat is fixed on the first rotating shaft, a trapezoidal slide groove is provided on the rotating seat, a trapezoidal slide rod is slidably provided inside the trapezoidal slide groove, and the trapezoidal slide rod is slidably connected to the trapezoidal slide groove;

[0007] A second rotating shaft is arranged above the trapezoidal sliding bar, the bottom of the second rotating shaft is slidably connected to the trapezoidal sliding bar, an extension rod is fixed on the second rotating shaft, and a partial discharge detection mechanism and a visual detection mechanism are arranged on the extension rod at intervals;

[0008] The partial discharge detection mechanism comprises a contact ultrasonic sensor and a partial discharge detector, the contact ultrasonic sensor is fixed to one end of the extension rod away from the second rotating shaft, the partial discharge detector is placed on the rotating seat, and the partial discharge detector is electrically connected to the contact ultrasonic sensor;

[0009] The visual inspection mechanism includes two industrial cameras, the extension rod is provided with two through slots at intervals, first limit seats are provided on both sides of the through slots, a support shaft is movably provided between the two first limit seats, and the industrial camera is fixedly installed on the support shaft;

[0010] A first adjusting worm wheel is installed on each of the two supporting shafts, a first adjusting worm is arranged between the two first adjusting worm wheels, and a bottom of the first adjusting worm is movably connected to the extension rod via a bearing;

[0011] A first bevel gear is installed on the first adjusting worm, an adjusting motor is installed on the extension rod, a second bevel gear is installed on the output end of the adjusting motor, and the first bevel gear and the second bevel gear are meshed with each other.

[0012] In a preferred embodiment, a rotating plate is installed on the first rotating shaft, a plurality of first blocks are circumferentially fixed on the rotating plate, a second limit seat is fixed on the trapezoidal slide bar, a sliding column is penetrated on the second limit seat, a second block is installed on the sliding column, and the second block is located between the two first blocks.

[0013] In a preferred embodiment, a shift plate is fixed on the sliding column, a limit spring is sleeved on the sliding column, one end of the limit spring is fixed on the second limit seat, and the other end of the limit spring is fixed on the shift plate.

[0014] In a preferred embodiment, a lead screw is movably arranged inside the trapezoidal slide groove through a bearing, one end of the lead screw extends into the trapezoidal slide rod, the other end of the lead screw extends out of the rotating seat and is equipped with a crank, and the lead screw is threadedly connected to the trapezoidal slide rod.

[0015] In a preferred embodiment, a connecting shaft is arranged under the top seat, the top of the connecting shaft passes through the top seat and is fixedly connected to the bottom of the first rotating shaft, a second adjusting worm gear is installed at the bottom of the connecting shaft, two third limit seats are fixed at intervals at the bottom of the top seat, a second adjusting worm is movably arranged between the two third limit seats through a bearing, and the second adjusting worm is meshed with the second adjusting worm gear.

[0016] In a preferred embodiment, two threaded columns and two guide rails are spaced apart at the bottom of the base, the top of the threaded column is movably connected to the base via a bearing, and the tops of the two guide rails are fixed to the bottom of the base;

[0017] A lifting seat is arranged directly below the base, the two guide rails and the two threaded columns all penetrate the lifting seat, the guide rails are slidably connected to the lifting seat, and the threaded columns are threadedly connected to the lifting seat.

[0018] In a preferred embodiment, a transmission worm gear is installed on each of the two threaded columns, a mounting seat is fixed at the bottom of the base, a transmission shaft is penetrated through the mounting seat, and transmission worms are respectively connected to both ends of the transmission shaft, and the two transmission worms are respectively meshed with the two transmission worm gears, and a driving motor is installed on one side of the base, and the output end of the driving motor is connected to one of the transmission worms through a coupling;

[0019] A magnetic plate is installed at the bottom of the lifting seat.

[0020] Beneficial effects of the present invention:

[0021] 1. When the inspection tooling is used, the staff can move the scissor lift to the aerial work lift, and then the aerial work lift will drive the staff and the scissor lift to the vicinity of the transformer to be inspected. At this time, the staff can move the scissor lift to the position facing the transformer, turn the crank to drive the lead screw to rotate, and under the action of the lead screw, the trapezoidal slide bar slides along the trapezoidal slide groove, and finally the contact ultrasonic sensor contacts the surface of the transformer. After a period of time, the staff can observe the test results through the partial discharge detector. By moving the scissor lift and starting the scissor lift, the top seat can be moved in multiple directions, front and back, up and down, so that the contact ultrasonic sensor contacts different positions of the transformer;

[0022] 2. When the transformer side needs to be inspected, the staff only needs to pull the dial to drive the second block to disengage from between the two first blocks. At this time, the extension rod can be rotated to an angle perpendicular to the trapezoidal slide bar. After the adjustment is completed, the dial is released. Under the action of the limit spring, the sliding column is reset. At this time, the second block re-enters between the two first blocks, and the extension rod can be fixed. The operation is simple and convenient;

[0023] 3. By setting up two industrial cameras, it is possible to detect whether there is damage on the transformer surface, whether the transformer bracket and cross arm (beam) are deformed, start the adjustment motor, and under the transmission action of the first bevel gear and the second bevel gear, the rotation of the first adjustment worm will drive the two first adjustment worm wheels to rotate at the same time. At this time, the two industrial cameras can shoot the environment near the transformer for the inspection personnel to watch;

[0024] 4. When the device is actually used, the staff can place the tools they carry on the surface of the rotating seat and start the drive motor. Under the transmission action of the two transmission worm gears and the two transmission worms, the two threaded columns rotate in the same direction at the same time, which will drive the mounting seat to move downward along the guide rail until the magnetic plate is tightly adsorbed to the bottom of the cargo basket of the aerial work lift, thereby greatly increasing the stability of the device when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional view of the overall structure of the transformer and rectifier detection tooling provided by the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of shown;

[0027] Figure 3 A schematic diagram of the internal structure of the rotating seat provided by the present invention;

[0028] Figure 4 A plan view of the overall structure of the transformer and rectifier detection tooling provided by the present invention;

[0029] Figure 5 A three-dimensional view of the local structure of the trapezoidal slide bar provided by the present invention;

[0030] Figure 6 A three-dimensional view of the local structure of the extension rod provided by the present invention;

[0031] Figure 7 The local structural plane view of the extension rod provided by the present invention Figure 1 ;

[0032] Figure 8 The local structural plane view of the extension rod provided by the present invention Figure 2 .

[0033] Numbers in the figure: 1, scissor lift; 2, top seat; 3, base; 4, first rotating axis; 5, rotating seat; 6, trapezoidal slide; 7, trapezoidal slide bar; 8, extension rod; 9, contact ultrasonic sensor; 10, partial discharge detector; 11, industrial camera; 12, through slot; 13, second rotating axis; 14, first limit seat; 15, support shaft; 16, first adjusting worm gear; 17, first adjusting worm; 18, first bevel gear; 19, adjusting motor; 20, second bevel gear ; 21. rotating plate; 22. first clamping block; 23. second limit seat; 24. sliding column; 25. second clamping block; 26. shifting plate; 27. limit spring; 28. lead screw; 29. ​​cranking handle; 30. connecting shaft; 31. second adjusting worm gear; 32. third limit seat; 33. second adjusting worm; 34. threaded column; 35. guide rail; 36. lifting seat; 37. transmission worm gear; 38. mounting seat; 39. transmission shaft; 40. transmission worm; 41. driving motor; 42. magnetic plate. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0035] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8 ,in Figure 1 A three-dimensional view of the overall structure of the transformer and rectifier detection tooling provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of shown; Figure 3 A schematic diagram of the internal structure of the rotating seat provided by the present invention;

[0036] Figure 4 A plan view of the overall structure of the transformer and rectifier detection tooling provided by the present invention; Figure 5 A three-dimensional view of the local structure of the trapezoidal slide bar provided by the present invention; Figure 6 A three-dimensional view of the local structure of the extension rod provided by the present invention; Figure 7 The local structural plane view of the extension rod provided by the present invention Figure 1 ; Figure 8 The local structural plane view of the extension rod provided by the present invention Figure 2 .

[0037] In the specific implementation process, Figure 1-Figure 8As shown, the scissor lift 1 includes a top seat 2 and a base 3. A first rotating shaft 4 is movably provided on the upper surface of the top seat 2. A rotating seat 5 is fixed on the first rotating shaft 4. A trapezoidal slide 6 is provided on the rotating seat 5. A trapezoidal slide bar 7 is slidably provided inside the trapezoidal slide 6. The trapezoidal slide bar 7 is slidably connected to the trapezoidal slide 6. A second rotating shaft 13 is provided above the trapezoidal slide bar 7. The bottom of the second rotating shaft 13 is slidably connected to the trapezoidal slide bar 7. An extension rod 8 is fixed on the second rotating shaft 13. A partial discharge detection mechanism and a visual detection mechanism are arranged at intervals on the extension rod 8.

[0038] The partial discharge detection mechanism includes a contact ultrasonic sensor 9 and a partial discharge detector 10. The contact ultrasonic sensor 9 is fixed to one end of the extension rod 8 away from the second rotating axis 13. The partial discharge detector 10 is placed on the rotating seat 5. The partial discharge detector 10 is electrically connected to the contact ultrasonic sensor 9. The specific model of the partial discharge detector 10 is HTJF-8003 partial discharge tester.

[0039] The visual inspection mechanism includes two industrial cameras 11, two through slots 12 are spaced apart on the extension rod 8, first limit seats 14 are provided on both sides of the through slots 12, a support shaft 15 is movably provided between the two first limit seats 14, the industrial camera 11 is fixedly mounted on the support shaft 15, and a display is installed on the rotating seat 5 for displaying the images captured by the industrial camera 11.

[0040] A first adjusting worm gear 16 is installed on each of the two supporting shafts 15, a first adjusting worm 17 is arranged between the two first adjusting worm gears 16, the bottom of the first adjusting worm gear 17 is movably connected to the extension rod 8 through a bearing, a first bevel gear 18 is installed on the first adjusting worm gear 17, an adjusting motor 19 is installed on the extension rod 8, a second bevel gear 20 is installed on the output end of the adjusting motor 19, the first bevel gear 18 and the second bevel gear 20 are meshed with each other, and by setting two industrial cameras 11, it is possible to detect whether there is damage on the surface of the transformer, whether the transformer bracket and the cross beam are deformed, and start the adjusting motor 19. Under the transmission action of the first bevel gear 18 and the second bevel gear 20, the rotation of the first adjusting worm gear 17 will drive the two first adjusting worm gears 16 to rotate at the same time. At this time, the two industrial cameras 11 can shoot the environment near the transformer for the inspectors to watch.

[0041] A rotating plate 21 is installed on the first rotating shaft 4, and a plurality of first clamping blocks 22 are circumferentially fixed on the rotating plate 21. A second limiting seat 23 is fixed on the trapezoidal slide bar 7, and a sliding column 24 is arranged through the second limiting seat 23. A second clamping block 25 is installed on the sliding column 24, and the second clamping block 25 is located between the two first clamping blocks 22. A dial plate 26 is fixed on the sliding column 24, and a limiting spring 27 is sleeved on the sliding column 24. One end of the limiting spring 27 is fixed on the second limiting seat 23, and the other end of the limiting spring 27 is fixed on the dial plate 26. When it is necessary to detect the side of the transformer, the staff only needs to pull the dial plate 26 to drive the second clamping block 25 to disengage from between the two first clamping blocks 22. At this time, the extension rod 8 can be rotated to an angle perpendicular to the trapezoidal slide bar 7. After the adjustment is completed, the dial plate 26 is released. Under the action of the limiting spring 27, the sliding column 24 is reset. At this time, the second clamping block 25 re-enters between the two first clamping blocks 22, and the extension rod 8 can be fixed.

[0042] A lead screw 28 is movably arranged inside the trapezoidal slide groove 6 through a bearing, one end of the lead screw 28 extends into the trapezoidal slide bar 7, and the other end of the lead screw 28 extends out of the rotating seat 5 and is installed with a crank 29. The lead screw 28 and the trapezoidal slide bar 7 are threadedly connected. Rotating the crank 29 drives the lead screw 28 to rotate. Under the action of the lead screw 28, the trapezoidal slide bar 7 slides along the trapezoidal slide groove 6, thereby causing the contact ultrasonic sensor 9 to move toward the transformer.

[0043] A connecting shaft 30 is arranged below the top seat 2. The top of the connecting shaft 30 passes through the top seat 2 and is fixedly connected to the bottom of the first rotating shaft 4. A second adjusting worm gear 31 is installed at the bottom of the connecting shaft 30. Two third limit seats 32 are fixed at intervals at the bottom of the top seat 2. A second adjusting worm 33 is movably arranged between the two third limit seats 32 through a bearing. The second adjusting worm 33 is meshed with the second adjusting worm gear 31.

[0044] Two threaded columns 34 and two guide rails 35 are arranged at intervals at the bottom of the base 3. The top of the threaded column 34 is movably connected to the base 3 through a bearing. The tops of the two guide rails 35 are fixed to the bottom of the base 3. A lifting seat 36 is arranged directly below the base 3. The two guide rails 35 and the two threaded columns 34 all penetrate the lifting seat 36. The guide rails 35 are slidably connected to the lifting seat 36. The threaded column 34 is threadedly connected to the lifting seat 36. A transmission worm gear 37 is installed on the two threaded columns 34. A mounting seat 38 is fixed at the bottom of the base 3. A transmission shaft 39 is penetrated on the mounting seat 38. The two ends of the transmission shaft 39 are respectively connected to a transmission worm 40. The two transmission worms 40 are respectively meshed with the two transmission worm gears 37. A driving motor 41 is installed on one side of the base 3. The output end of the driving motor 41 is connected to one of the transmission worms 40 through a coupling. A magnetic plate 42 is installed at the bottom of the lifting seat 36, and the magnetic plate 42 can be tightly adsorbed on the bottom of the metal basket of the aerial work lift.

[0045] Working principle of the present invention: When the detection tool is used, the staff can move the scissor lift 1 to the aerial work lift, and then the aerial work lift will drive the staff and the scissor lift 1 to the vicinity of the transformer to be detected. At this time, the staff can move the scissor lift 1 to a position directly opposite the transformer. At this time, the crank 29 can be turned to drive the lead screw 28 to rotate. Under the action of the lead screw 28, the trapezoidal slide bar 7 slides along the trapezoidal slide groove 6, and finally the contact ultrasonic sensor 9 contacts the surface of the transformer. After a period of time, the staff can observe the detection results through the partial discharge detector 10. By moving the scissor lift 1 and starting the scissor lift 1, the top seat 2 can be moved in multiple directions, front and back, up and down, so that the contact ultrasonic sensor 9 contacts different positions of the transformer;

[0046] When it is necessary to inspect the side of the transformer, the staff only needs to pull the dial plate 26 to drive the second block 25 to disengage from between the two first blocks 22, and then the extension rod 8 can be rotated to an angle perpendicular to the trapezoidal slide bar 7. After the adjustment is completed, the dial plate 26 is released, and under the action of the limit spring 27, the slide column 24 is reset, and the second block 25 re-enters between the two first blocks 22, and the extension rod 8 can be fixed;

[0047] By setting up two industrial cameras 11, it is possible to detect whether there is damage on the transformer surface, whether the transformer bracket and the cross arm (beam) are deformed, start the adjustment motor 19, and under the transmission action of the first bevel gear 18 and the second bevel gear 20, the rotation of the first adjustment worm 17 will drive the two first adjustment worm wheels 16 to rotate at the same time. At this time, the two industrial cameras 11 can shoot the environment near the transformer for the inspection personnel to watch;

[0048] When the device is actually used, the staff can place the tools they carry on the surface of the rotating seat 5 and start the drive motor 42. Under the transmission action of the two transmission worm wheels 37 and the two transmission worms 37, the two threaded columns 34 rotate in the same direction at the same time, which will drive the mounting seat 38 to move downward along the guide rail 35 until the magnetic plate 42 is tightly adsorbed to the bottom of the cargo basket of the aerial work lift, thereby greatly increasing the stability of the device when in use.

[0049] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0050] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A transformer and rectifier inspection tool, comprising a scissor lift (1), wherein the scissor lift (1) is provided with a top seat (2) and a base (3), characterized in that: A first rotating shaft (4) is movably arranged on the upper surface of the top seat (2), a rotating seat (5) is fixed on the first rotating shaft (4), a trapezoidal slide groove (6) is provided on the rotating seat (5), a trapezoidal slide rod (7) is slidably arranged inside the trapezoidal slide groove (6), and the trapezoidal slide rod (7) is slidably connected to the trapezoidal slide groove (6); A second rotating shaft (13) is arranged above the trapezoidal sliding bar (7), the bottom of the second rotating shaft (13) is slidably connected to the trapezoidal sliding bar (7), an extension rod (8) is fixed on the second rotating shaft (13), and a partial discharge detection mechanism and a visual detection mechanism are arranged at intervals on the extension rod (8); The partial discharge detection mechanism comprises a contact ultrasonic sensor (9) and a partial discharge detector (10); the contact ultrasonic sensor (9) is fixed to one end of the extension rod (8) away from the second rotating shaft (13); the partial discharge detector (10) is placed on the rotating seat (5); and the partial discharge detector (10) is electrically connected to the contact ultrasonic sensor (9); The visual inspection mechanism comprises two industrial cameras (11), the extension rod (8) is provided with two through slots (12) at intervals, first limit seats (14) are provided on both sides of the through slots (12), a support shaft (15) is movably provided between the two first limit seats (14), and the industrial camera (11) is fixedly mounted on the support shaft (15); A first adjusting worm wheel (16) is mounted on each of the two supporting shafts (15); a first adjusting worm screw (17) is disposed between the two first adjusting worm wheels (16); and a bottom of the first adjusting worm screw (17) is movably connected to the extension rod (8) via a bearing; A first bevel gear (18) is mounted on the first adjusting worm (17), an adjusting motor (19) is mounted on the extension rod (8), a second bevel gear (20) is mounted on the output end of the adjusting motor (19), and the first bevel gear (18) and the second bevel gear (20) are meshed with each other.

2. The transformer and rectifier detection tooling according to claim 1 is characterized in that: A rotating plate (21) is mounted on the first rotating shaft (4), a plurality of first clamping blocks (22) are circumferentially fixed on the rotating plate (21), a second limiting seat (23) is fixed on the trapezoidal sliding rod (7), a sliding column (24) is provided through the second limiting seat (23), a second clamping block (25) is mounted on the sliding column (24), and the second clamping block (25) is located between two of the first clamping blocks (22).

3. The transformer and rectifier detection tooling according to claim 2, characterized in that: A shift plate (26) is fixed on the sliding column (24), a limit spring (27) is sleeved on the sliding column (24), one end of the limit spring (27) is fixed on the second limit seat (23), and the other end of the limit spring (27) is fixed on the shift plate (26).

4. The transformer and rectifier detection tooling according to claim 3, characterized in that: A lead screw (28) is movably arranged inside the trapezoidal slide groove (6) via a bearing, one end of the lead screw (28) extends into the trapezoidal slide bar (7), and the other end of the lead screw (28) extends out of the rotating seat (5) and is provided with a crank (29), and the lead screw (28) is threadedly connected to the trapezoidal slide bar (7).

5. The transformer and rectifier detection tooling according to claim 4, characterized in that: A connecting shaft (30) is arranged below the top seat (2); the top of the connecting shaft (30) passes through the top seat (2) and is fixedly connected to the bottom of the first rotating shaft (4); a second adjusting worm gear (31) is installed at the bottom of the connecting shaft (30); two third limiting seats (32) are fixed at intervals at the bottom of the top seat (2); a second adjusting worm (33) is movably arranged between the two third limiting seats (32) via a bearing; the second adjusting worm gear (33) is meshed with the second adjusting worm gear (31).

6. The transformer and rectifier detection tooling according to claim 5, characterized in that: Two threaded columns (34) and two guide rails (35) are arranged at intervals at the bottom of the base (3); the top of the threaded column (34) is movably connected to the base (3) via a bearing, and the tops of the two guide rails (35) are fixed to the bottom of the base (3); A lifting seat (36) is arranged directly below the base (3); the two guide rails (35) and the two threaded columns (34) all penetrate the lifting seat (36); the guide rails (35) are slidably connected to the lifting seat (36); and the threaded columns (34) are threadedly connected to the lifting seat (36).

7. The transformer and rectifier detection tooling according to claim 6, characterized in that: A transmission worm gear (37) is mounted on each of the two threaded columns (34); a mounting seat (38) is fixed to the bottom of the base (3); a transmission shaft (39) is provided through the mounting seat (38); two ends of the transmission shaft (39) are respectively connected to transmission worms (40); the two transmission worms (40) are respectively meshed with the two transmission worm gears (37); a drive motor (41) is mounted on one side of the base (3); an output end of the drive motor (41) is connected to one of the transmission worms (40) via a coupling; A magnetic plate (42) is installed at the bottom of the lifting seat (36).

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