A partial discharge test device for dry-type transformers

Abstract

The present invention provides a partial discharge test device for a dry-type transformer, including a scissor lift. A support platform is fixed at the top of the scissor lift. Four groups of trapezoidal chutes are spaced apart on the surface of the support platform, and the four groups of trapezoidal chutes are arranged in a square shape. Two first mounting seats are symmetrically arranged above the support platform. A trapezoidal slider is fixed at the bottom of the first mounting seat, and the trapezoidal slider is slidably connected to the trapezoidal chute. A second mounting seat is arranged between the two first mounting seats, and the second mounting seat is fixed on the support platform. Coupling capacitors are installed on both the first mounting seat and the second mounting seat. The present invention solves the problem in the prior art that the positions of the coupling capacitors of the transformer still need to be adjusted manually one by one, which not only takes a long time to operate, but may also cause a large deviation in the distance between the three electrothermal couplers, thus possibly resulting in inaccurate measurement results.

Description

Technical Field

[0001] The present invention relates to the field of transformer tests, and particularly to a partial discharge test device for a dry-type transformer. Background Art

[0002] Power transformers are key equipment for power conversion in the power system's power transmission and transformation. They play an important role in the power grid. The reliability of their operation directly affects the safety and stability of the power system. Insulation faults are the main reasons affecting the normal operation of power transformers, and partial discharge is the main cause of insulation faults and also the early manifestation of faults. Through the detection and analysis of partial discharge, faults can be pre-warned and eliminated in advance. The partial discharge test of a dry-type transformer requires three-phase power supply and three-phase simultaneous measurement. In the prior art, the test of transformer partial discharge mainly adjusts three coupling capacitors installed on the test device to adapt to different models of transformers.

[0003] The existing test device still has a relatively single adjustment method for the coupling capacitors. Only setting the coupling capacitors to a structure with adjustable positions still requires manual adjustment one by one. This not only takes a long time to operate, but may also cause a large deviation in the distance between the three electrothermal couplers, which may lead to inaccurate measurement results.

[0004] Therefore, it is necessary to provide a new partial discharge test device for a dry-type transformer to solve the above technical problems. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a partial discharge test device for a dry-type transformer, which solves the problem in the prior art that the positions of the coupling capacitors of the transformer still need to be adjusted manually one by one, not only taking a long time to operate, but also possibly causing a large deviation in the distance between the three electrothermal couplers, which may lead to inaccurate measurement results.

[0006] The partial discharge test device for a dry-type transformer provided by the present invention includes a scissor lift. A support platform is fixed to the top of the scissor lift. Four groups of trapezoidal chutes are spaced apart on the surface of the support platform, and the four groups of trapezoidal chutes are arranged in a square shape. Two first mounting seats are symmetrically arranged above the support platform. A trapezoidal slider is fixed to the bottom of the first mounting seat, and the trapezoidal slider is slidably connected to the trapezoidal chute;

[0007] A second mounting seat is arranged between the two first mounting seats. The second mounting seat is fixed to the support platform. Coupling capacitors are installed on both the first mounting seat and the second mounting seat;

[0008] Above the scissor lift, a gantry is provided. Below the gantry, an elliptical seat is fixed through a connecting seat. An elliptical track is installed on the elliptical seat. Two rotating shafts are arranged at intervals on the elliptical seat. The bottom of the rotating shaft is movably connected to the elliptical seat through a bearing. Transmission sprockets are installed on both of the two rotating shafts. The two transmission sprockets are connected by a conveyor chain. Two moving seats are arranged at intervals on one side of the conveyor chain. A C-shaped plate is fixed on one side of the moving seat. The C-shaped plate is fixed on the conveyor chain. A plurality of limiting columns are fixed at the bottom of the moving seat, and the plurality of limiting columns are symmetrically arranged on both sides of the elliptical track. A storage battery is installed on one of the moving seats, and a detection mechanism is arranged on the other moving seat.

[0009] In a preferred embodiment, two bidirectional lead screws are movably arranged on the support table through bearings. The two ends of the bidirectional lead screw are respectively located inside two adjacent groups of the trapezoidal chutes.

[0010] The bidirectional lead screw penetrates through the trapezoidal slider, and the bidirectional lead screw is in threaded connection with the trapezoidal slider.

[0011] In a preferred embodiment, one end of each of the two bidirectional lead screws penetrates through the support table and is provided with a first bevel gear. A first limit seat is arranged between the two first bevel gears. A transmission shaft penetrates through the first limit seat, and the transmission shaft is movably connected to the first limit seat through a bearing.

[0012] Two second bevel gears are installed at intervals on the transmission shaft. The two second bevel gears are respectively meshed with the two first bevel gears. A servo motor is installed on the scissor lift. The output end of the servo motor is connected to the bidirectional lead screw through a coupling.

[0013] In a preferred embodiment, a driving motor is installed on the elliptical seat. The output end of the driving motor is provided with a third bevel gear. A fourth bevel gear is arranged on one side of the third bevel gear. The fourth bevel gear is installed at the top of the rotating shaft. The third bevel gear is meshed with the fourth bevel gear.

[0014] In a preferred embodiment, the detection mechanism includes a contact ultrasonic sensor and a partial discharge tester. A vertical seat is fixed on one side of the moving seat. A through groove is formed on the surface of the vertical seat. An adjusting lead screw and a slide rail are arranged at intervals on one side of the vertical seat. The slide rail is fixed on the vertical seat. The adjusting lead screw penetrates through the vertical seat.

[0015] One side of the vertical base is provided with an adjusting base. The slide rail and the adjusting lead screw both penetrate through the adjusting base. One side of the adjusting base is fixed with a mounting rod. One end of the mounting rod away from the adjusting base extends out of the through groove and is installed with the contact ultrasonic sensor.

[0016] In a preferred embodiment, the adjusting lead screw is movably connected to the vertical base through a bearing. The adjusting lead screw is threadedly connected to the adjusting base. The slide rail is slidably connected to the adjusting base.

[0017] In a preferred embodiment, an adjusting motor is installed on the moving base. The output end of the adjusting motor is connected to the adjusting lead screw through a coupling.

[0018] In a preferred embodiment, the storage battery is electrically connected to the adjusting motor. The partial discharge tester is a portable partial discharge detector. A placement table is installed on the moving base. Two baffles are fixedly spaced on the placement table. The partial discharge tester is placed on the placement table and is located between the two baffles;

[0019] One side of one of the baffles is provided with a fastening plate. One side of the fastening plate is provided with a moving column. One end of the moving column is fixed on the surface of the fastening plate. The other end of the moving column penetrates through the baffle and is connected to a pulling plate. A return spring is sleeved on the moving column. One end of the return spring is fixed on the pulling plate. The other end of the return spring is fixed on the surface of the baffle.

[0020] In a preferred embodiment, a scale groove is formed on one side surface of the support table.

[0021] Advantages of the present invention:

[0022] 1. When it is necessary to adjust the distance between the three coupling capacitors, the servo motor can be started at this time to drive one of the bidirectional lead screws to rotate. Under the transmission action of the two first bevel gears, the transmission shaft and the two second bevel gears, the two bidirectional lead screws rotate simultaneously to drive the trapezoidal slider to rotate along the trapezoidal chute, so as to easily adjust the distance between the two first mounting seats and the second mounting seat. The position of the first mounting seat is adjusted by the two bidirectional lead screws. And after the adjustment is completed, the self-locking function of the two bidirectional lead screws can make the first mounting seat stop stably on the surface of the support table. In summary, when testing transformers of different models, the present invention can synchronously and quickly adjust the distance between the two outer coupling capacitors, improving the test efficiency;

[0023] 2. When a partial discharge test needs to be carried out on the surface of the transformer, there is no need for the staff to approach the coupling capacitor. Only need to start the adjusting motor to drive the adjusting lead screw to rotate. Under the driving action of the adjusting lead screw, the mounting rod moves along the slide rail towards the coupling capacitor until the contact ultrasonic sensor contacts the surface to be tested. And because the moving seat can move on the elliptical track and the scissor lift can drive multiple coupling capacitors to move up and down, therefore, this contact ultrasonic sensor can detect each area of the transformer to be tested, further increasing the detection efficiency and also greatly increasing the safety of the staff during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the three-dimensional view of the main structure of the partial discharge test device for dry-type transformers provided by the present invention Figure 1 ;

[0025] Figure 2 is Figure 1 the enlarged structural schematic diagram of A shown in

[0026] Figure 3 is the three-dimensional view of the main structure of the partial discharge test device for dry-type transformers provided by the present invention Figure 2 ;

[0027] Figure 4 is the structural schematic diagram of the support platform provided by the present invention

[0028] Figure 5 is Figure 4 the enlarged structural schematic diagram of B shown in

[0029] Figure 6 is the overall structural plan view of the partial discharge test device for dry-type transformers provided by the present invention

[0030] Figure 7 is the top view of the transmission sprocket provided by the present invention

[0031] Figure 8 is the structural schematic diagram of the placement table provided by the present invention

[0032] Reference numerals in the figure: 1, scissor lift; 2, support table; 3, trapezoidal chute; 4, first mounting seat; 5, trapezoidal slider; 6, second mounting seat; 7, coupling capacitor; 8, bidirectional lead screw; 9, first bevel gear; 10, first limit seat; 11, transmission shaft; 12, second bevel gear; 13, servo motor; 14, gantry; 15, connecting seat; 16, elliptical seat; 17, elliptical track; 18, rotating shaft; 19, transmission sprocket; 20, conveyor chain; 21, moving seat; 22, C-shaped plate; 23, limit post; 24, storage battery; 25, drive motor; 26, third bevel gear; 27, fourth bevel gear; 28, contact type ultrasonic sensor; 29, partial discharge tester; 30, vertical seat; 31, through slot; 32, adjusting lead screw; 33, slide rail; 34, adjusting seat; 35, mounting rod; 36, placement table; 37, baffle; 38, fastening plate; 39, moving column; 40, pull plate; 41, return spring; 42, scale slot; 43, adjusting motor. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with the accompanying drawings and implementation manners.

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , where Figure 1 is the main structure three-dimensional view of the partial discharge test device for dry-type transformers provided by the present invention Figure 1 ; Figure 2 is Figure 1 the enlarged structural schematic diagram of A shown in Figure 3 is the main structure three-dimensional view of the partial discharge test device for dry-type transformers provided by the present invention Figure 2 ; Figure 4 is the structural schematic diagram of the support table provided by the present invention;

[0035] Figure 5 is Figure 4 the enlarged structural schematic diagram of B shown in Figure 6 is the overall structure plan view of the partial discharge test device for dry-type transformers provided by the present invention; Figure 7 is the top view of the transmission sprocket provided by the present invention; Figure 8 is the structural schematic diagram of the placement table provided by the present invention.

[0036] In the specific implementation process, as Figures 1 - 8As shown in the figure, it includes a scissor lift 1. A support platform 2 is fixed at the top of the scissor lift 1. Four groups of trapezoidal chutes 3 are spaced apart on the surface of the support platform 2, and the four groups of trapezoidal chutes 3 are arranged in a square shape. Two first mounting seats 4 are symmetrically arranged above the support platform 2. A trapezoidal slider 5 is fixed at the bottom of the first mounting seat 4. The trapezoidal slider 5 is slidably connected to the trapezoidal chute 3. Two bidirectional lead screws 8 are movably arranged on the support platform 2 through bearings. The two ends of the bidirectional lead screw 8 are respectively located inside two adjacent groups of trapezoidal chutes 3. The bidirectional lead screw 8 passes through the trapezoidal slider 5, and the bidirectional lead screw 8 is threadedly connected to the trapezoidal slider 5. When the two bidirectional lead screws 8 rotate simultaneously in the same direction, the two adjacent trapezoidal sliders 5 can be driven to approach or move away from each other along the trapezoidal chutes 3. A second mounting seat 6 is arranged between the two first mounting seats 4. The second mounting seat 6 is fixed on the support platform 2. Coupling capacitors 7 are installed on both the first mounting seat 4 and the second mounting seat 6. A scale groove 42 is provided on one side surface of the support platform 2, which is convenient for the staff to observe the distance between the three coupling capacitors 7.

[0037] One end of each of the two bidirectional lead screws 8 passes through the support platform 2 and is provided with a first bevel gear 9. A first limit seat 10 is arranged between the two first bevel gears 9. A transmission shaft 11 is arranged through the first limit seat 10. The transmission shaft 11 is movably connected to the first limit seat 10 through a bearing. Two second bevel gears 12 are spaced apart and installed on the transmission shaft 11. The two second bevel gears 12 are respectively meshed with the two first bevel gears 9. A servo motor 13 is installed on the scissor lift 1. The output end of the servo motor 13 is connected to the bidirectional lead screw 8 through a coupling. When it is necessary to adjust the distance between the three coupling capacitors 7, the servo motor 13 can be started at this time to drive one of the bidirectional lead screws 8 to rotate. Under the transmission action of the two first bevel gears 9, the transmission shaft 11 and the two second bevel gears 12, the two bidirectional lead screws 8 rotate simultaneously to drive the trapezoidal sliders 5 to rotate along the trapezoidal chutes 3, so as to achieve the purpose of adjusting the distance between the two first mounting seats 4 and the second mounting seat 6. The positions of the first mounting seats 4 are adjusted by the two bidirectional lead screws 8. After the adjustment is completed, the self-locking function of the two bidirectional lead screws 8 can make the first mounting seats 4 stop stably on the surface of the support platform 2. In summary, when it is necessary to test transformers of different models, the present invention can synchronously and quickly adjust the distance between the two outer coupling capacitors 7, improving the test efficiency.

[0038] There is a gantry 14 directly above the scissor lift 1. An elliptical seat 16 is fixed below the gantry 14 through a connecting seat 15. An elliptical track 17 is installed on the elliptical seat 16. Two rotating shafts 18 are arranged at intervals on the elliptical seat 16. The bottom of the rotating shaft 18 is movably connected to the elliptical seat 16 through a bearing. Transmission sprockets 19 are installed on both rotating shafts 18. The two transmission sprockets 19 are connected by a conveyor chain 20. Two moving seats 21 are arranged at intervals on one side of the conveyor chain 20. A C-shaped plate 22 is fixed on one side of the moving seat 21. The C-shaped plate 22 is fixed on the conveyor chain 20. A plurality of limiting columns 23 are fixed at the bottom of the moving seat 21, and the plurality of limiting columns 23 are symmetrically arranged on both sides of the elliptical track 17. A storage battery 24 is installed on one of the moving seats 21, and a detection mechanism is arranged on the other moving seat 21. A driving motor 25 is installed on the elliptical seat 16. A third bevel gear 26 is installed at the output end of the driving motor 25. A fourth bevel gear 27 is arranged on one side of the third bevel gear 26. The fourth bevel gear 27 is installed at the top of the rotating shaft 18. The third bevel gear 26 meshes with the fourth bevel gear 27. When the driving motor 25 is started, under the transmission of the third bevel gear 26 and the fourth bevel gear 27, one of the transmission sprockets 19 rotates, and then drives the other transmission sprocket 19 and the conveyor chain 20 to move. At this time, the moving seat 21 fixed on the conveyor chain 20 is also driven to move along the elliptical track 17.

[0039] The detection mechanism includes a contact ultrasonic sensor 28 and a partial discharge tester 29. A vertical seat 30 is fixed on one side of the moving seat 21. A through groove 31 is formed on the surface of the vertical seat 30. An adjusting lead screw 32 and a slide rail 33 are arranged at intervals on one side of the vertical seat 30. The slide rail 33 is fixed on the vertical seat 30. The adjusting lead screw 32 is arranged through the vertical seat 30;

[0040] On one side of the vertical seat 30, there is an adjusting seat 34. The slide rail 33 and the adjusting lead screw 32 both penetrate through the adjusting seat 34. On one side of the adjusting seat 34, there is a mounting rod 35 fixed. The end of the mounting rod 35 away from the adjusting seat 34 extends out of the through groove 31 and is equipped with a contact ultrasonic sensor 28. The adjusting lead screw 32 is movably connected to the vertical seat 30 through a bearing. The adjusting lead screw 32 is threadedly connected to the adjusting seat 34. The slide rail 33 is slidably connected to the adjusting seat 34. An adjusting motor 43 is installed on the moving seat 21. The output end of the adjusting motor 43 is connected to the adjusting lead screw 32 through a coupling. When a partial discharge test needs to be carried out on the surface of the transformer, there is no need for the staff to approach the coupling capacitor 7. Only need to start the adjusting motor 43 to drive the adjusting lead screw 32 to rotate. Under the driving action of the adjusting lead screw 32, the mounting rod 35 moves along the slide rail 33 towards the coupling capacitor 7 until the contact ultrasonic sensor 28 contacts the surface to be tested. And because the moving seat 21 can move on the elliptical track 17, and the scissor lift 1 can drive a plurality of coupling capacitors 7 to move up and down. Therefore, this contact ultrasonic sensor 28 can detect each area of the transformer to be tested, further increasing the detection efficiency and also greatly increasing the safety of the staff during the test.

[0041] The storage battery 24 is electrically connected to the adjusting motor 43. The partial discharge tester 29 is a portable partial discharge detector, and its model is specifically HTJF-8003. A placement table 36 is installed on the moving seat 21. Two baffles 37 are fixedly spaced on the placement table 36. The partial discharge tester 29 is placed on the placement table 36, and the partial discharge tester 29 is located between the two baffles 37. On one side of one of the baffles 37, there is a fastening plate 38. On one side of the fastening plate 38, there is a moving column 39. One end of the moving column 39 is fixed on the surface of the fastening plate 38. The other end of the moving column 39 penetrates through the baffle 37 and is connected to a pulling plate 40. A return spring 41 is sleeved on the moving column 39. One end of the return spring 41 is fixed on the pulling plate 40, and the other end of the return spring 41 is fixed on the surface of the baffle 37. In order to prevent the partial discharge tester 29 from falling when the moving seat 21 moves, at this time, the staff can pull the pulling plate 40 to drive the moving column 39 to move. Driven by the moving column 39, the fastening plate 38 moves accordingly. At this time, the partial discharge tester 29 can be placed on the placement table 36. Finally, release the pulling plate 40. Under the action of the return spring 41, the fastening plate 38 moves towards the partial discharge tester 29, and finally the partial discharge tester 29 is fixed.

[0042] The working principle of the present invention:

[0043] When it is necessary to adjust the distance between the three coupling capacitors 7, the servo motor 13 can be started at this time to drive one of the bidirectional lead screws 8 to rotate. Under the transmission of the two first bevel gears 9, the transmission shaft 11 and the two second bevel gears 12, the two bidirectional lead screws 8 rotate simultaneously to drive the trapezoidal slider 5 to rotate along the trapezoidal chute 3, so as to achieve the purpose of adjusting the distance between the two first mounting seats 4 and the second mounting seat 6. The positions of the first mounting seats 4 are adjusted by the two bidirectional lead screws 8. After the adjustment is completed, the self-locking function of the two bidirectional lead screws 8 can make the first mounting seats 4 stop stably on the surface of the support table 2. In summary, when different types of transformers need to be tested, the present invention can synchronously and quickly adjust the distance between the two outer coupling capacitors 7, improving the test efficiency;

[0044] When a partial discharge test needs to be carried out on the surface of the transformer, there is no need for the staff to approach the coupling capacitor 7. Only need to start the adjustment motor 43 to drive the adjustment lead screw 32 to rotate. Under the transmission of the adjustment lead screw 32, the mounting rod 35 moves along the slide rail 33 towards the coupling capacitor 7 until the contact ultrasonic sensor 28 contacts the surface to be tested. And because the moving seat 21 can move on the elliptical track 17, and the scissor lift 1 can drive multiple coupling capacitors 7 to move up and down, therefore, the contact ultrasonic sensor 28 can detect each area of the transformer to be tested, further increasing the detection efficiency and greatly increasing the safety of the staff during the test.

[0045] The circuits and controls involved in the present invention are all prior arts and will not be elaborated here too much.

[0046] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A dry-type transformer partial discharge test device, comprising a scissor lift (1), characterized in that: A support platform (2) is fixedly installed at the top of the scissor lift (1). Four groups of trapezoidal chutes (3) are spaced apart on the surface of the support platform (2), and the four groups of trapezoidal chutes (3) are arranged in a square shape. Two first mounting seats (4) are symmetrically arranged above the support platform (2). A trapezoidal slider (5) is fixedly installed at the bottom of the first mounting seat (4), and the trapezoidal slider (5) is slidably connected to the trapezoidal chute (3). A second mounting seat (6) is arranged between the two first mounting seats (4). The second mounting seat (6) is fixed on the support platform (2). Coupling capacitors (7) are installed on both the first mounting seat (4) and the second mounting seat (6). A gantry (14) is arranged directly above the scissor lift (1). An elliptical seat (16) is fixedly installed below the gantry (14) through a connecting seat (15). An elliptical track (17) is installed on the elliptical seat (16). Two rotating shafts (18) are spaced apart on the elliptical seat (16). The bottom of the rotating shaft (18) is movably connected to the elliptical seat (16) through a bearing. Transmission sprockets (19) are installed on both of the two rotating shafts (18). The two transmission sprockets (19) are connected by a conveyor chain (20). Two moving seats (21) are spaced apart on one side of the conveyor chain (20). A C-shaped plate (22) is fixedly installed on one side of the moving seat (21), and the C-shaped plate (22) is fixed on the conveyor chain (20). A plurality of limiting columns (23) are fixedly installed at the bottom of the moving seat (21), and the plurality of limiting columns (23) are symmetrically arranged on both sides of the elliptical track (17). A storage battery (24) is installed on one of the moving seats (21), and a detection mechanism is arranged on the other moving seat (21).

2. The dry-type transformer partial discharge test device according to claim 1 is characterized in that: Two bidirectional lead screws (8) are movably arranged on the support platform (2) through bearings. The two ends of the bidirectional lead screw (8) are respectively located inside two adjacent groups of trapezoidal chutes (3). The bidirectional lead screw (8) penetrates through the trapezoidal slider (5), and the bidirectional lead screw (8) is threadedly connected to the trapezoidal slider (5).

3. The dry-type transformer partial discharge test device according to claim 2 is characterized in that: One end of each of the two bidirectional lead screws (8) penetrates through the support platform (2) and is provided with a first bevel gear (9). A first limit seat (10) is arranged between the two first bevel gears (9). A transmission shaft (11) penetrates through the first limit seat (10), and the transmission shaft (11) is movably connected to the first limit seat (10) through a bearing. Two second bevel gears (12) are spaced apart and installed on the transmission shaft (11). The two second bevel gears (12) are respectively meshed with the two first bevel gears (9). A servo motor (13) is installed on the scissor lift (1), and the output end of the servo motor (13) is connected to the bidirectional lead screw (8) through a coupling.

4. The dry-type transformer partial discharge test device according to claim 3 is characterized in that: A drive motor (25) is mounted on the elliptical seat (16); a third bevel gear (26) is mounted on the output end of the drive motor (25); a fourth bevel gear (27) is arranged on one side of the third bevel gear (26); the fourth bevel gear (27) is mounted on the top of the rotating shaft (18); the third bevel gear (26) is meshed with the fourth bevel gear (27).

5. The dry-type transformer partial discharge test device according to claim 4, characterized in that: The detection mechanism comprises a contact ultrasonic sensor (28) and a partial discharge tester (29); a stand (30) is fixed on one side of the movable seat (21); a through groove (31) is provided on the surface of the stand (30); an adjustment screw (32) and a slide rail (33) are arranged at intervals on one side of the stand (30); the slide rail (33) is fixed on the stand (30); and the adjustment screw (32) is arranged through the stand (30); An adjustment seat (34) is provided on one side of the stand (30); the slide rail (33) and the adjustment screw (32) both pass through the adjustment seat (34); a mounting rod (35) is fixed on one side of the adjustment seat (34); an end of the mounting rod (35) away from the adjustment seat (34) extends out of the through slot (31) and is mounted with the contact ultrasonic sensor (28).

6. The dry-type transformer partial discharge test device according to claim 5, characterized in that: The adjusting screw (32) is movably connected to the stand (30) via a bearing, the adjusting screw (32) is threadedly connected to the adjusting seat (34), and the slide rail (33) is slidably connected to the adjusting seat (34).

7. The dry-type transformer partial discharge test device according to claim 6, characterized in that: An adjusting motor (43) is mounted on the movable seat (21), and an output end of the adjusting motor (43) is connected to the adjusting screw (32) via a coupling.

8. The dry-type transformer partial discharge test device according to claim 7, characterized in that: The storage battery (24) is electrically connected to the regulating motor (43); the partial discharge tester (29) is a portable partial discharge detector; a placement table (36) is installed on the movable seat (21); two baffles (37) are fixed on the placement table (36) at intervals; the partial discharge tester (29) is placed on the placement table (36), and the partial discharge tester (29) is located between the two baffles (37); A fastening plate (38) is provided on one side of one of the baffles (37), and a moving column (39) is provided on one side of the fastening plate (38). One end of the moving column (39) is fixed to the surface of the fastening plate (38), and the other end of the moving column (39) passes through the baffle (37) and is connected to a pull plate (40). A return spring (41) is sleeved on the moving column (39), and one end of the return spring (41) is fixed to the pull plate (40), and the other end of the return spring (41) is fixed to the surface of the baffle (37).

9. The dry-type transformer partial discharge test device according to claim 8, characterized in that: A scale groove (42) is provided on one side surface of the support platform (2).

Images