A transformer bushing dielectric loss test device

Abstract

The application discloses a transformer bushing dielectric loss test device and belongs to the field of transformer bushing detection. The device comprises a dielectric loss test table, a dielectric loss detector arranged on the top of the dielectric loss test table, a detection bushing arranged on the top of the dielectric loss test table, a terminal wiring positioning mechanism arranged on the top of the dielectric loss test table, a final screen wiring positioning mechanism arranged on the front of the terminal wiring positioning mechanism, and a positioning and collecting mechanism arranged on the inner wall of the dielectric loss test table. When the dielectric loss test of the transformer bushing is performed, the terminal wiring positioning mechanism and the final screen wiring positioning mechanism are used to position the wiring positions of the detection bushing in positive connection and reverse connection, and the positions are connected with the dielectric loss detector, so that the wiring direction of the wiring mechanism does not need to be repeatedly adjusted, the detection efficiency of the detection bushing is improved, and after the dielectric loss detection, the positioning telescopic column and the extrusion positioning sliding block are used to drive the left positioning sliding block to be clamped with the next detection bushing that rolls down, so that the operation of separate positioning and collecting is completed.

Description

Technical Field

[0001] This invention relates to the field of transformer bushing testing technology, and in particular to a transformer bushing dielectric loss testing device. Background Technology

[0002] Transformer bushings are the main insulation devices outside the transformer box. The leads of the transformer windings must pass through the insulating bushings to insulate the leads from each other and from the transformer casing, while also fixing the leads in place.

[0003] Inside the transformer bushing, multiple layers of aluminum foil paperboard are installed and formed into concentric cylindrical capacitors by oil immersion. This insulates the conductors passing through the central copper tube from the external environment. After the transformer bushing is manufactured, it is necessary to conduct dielectric loss tests on the bushing under both positive and negative connections to determine its factory dielectric loss tangent value, providing a reference value for dielectric loss tests during subsequent use of the transformer bushing.

[0004] When testing the main insulation dielectric loss tangent of a transformer bushing during factory dielectric loss testing, the bushing terminals and the end screen terminals need to be connected in the correct orientation. Simultaneously, the ground dielectric loss tangent of the end screen also needs to be tested during the testing process. This requires disconnecting the terminal test leads and connecting only the end screen, i.e., testing via reverse wiring. Traditional testing methods require repeatedly adjusting the wiring direction of the wiring mechanism to connect transformer bushings in different orientations, which reduces the efficiency of the dielectric loss test on the transformer bushing.

[0005] Therefore, we propose a transformer bushing dielectric loss testing device. Summary of the Invention

[0006] The purpose of this invention is to solve the problem in the prior art that when performing dielectric loss testing on transformer bushings with different placement orientations, it is necessary to repeatedly adjust the wiring direction of the wiring mechanism, thereby reducing the testing efficiency. Therefore, this invention proposes a transformer bushing dielectric loss testing device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A transformer bushing dielectric loss testing device includes a dielectric loss testing platform, a dielectric loss detector is provided on the top of the dielectric loss testing platform, a detection bushing is provided on the top of the dielectric loss testing platform, a terminal wiring positioning mechanism is provided on the top of the dielectric loss testing platform, a final screen wiring positioning mechanism is provided on the front of the terminal wiring positioning mechanism, and a positioning and collecting mechanism is provided on the inner wall of the dielectric loss testing platform. The terminal wiring positioning mechanism includes a detection positioning slide groove disposed on the inner wall of the dielectric loss test bench, a terminal wiring positioning ring disposed on the inner wall of the dielectric loss test bench, a detection clamping column disposed on the inner side of the terminal wiring positioning ring, a detection clamping block disposed on the outer side of the detection clamping column, and a wiring coil electrically connected to the dielectric loss tester disposed on the outer side of the terminal wiring positioning ring. The end-screen wiring positioning mechanism includes an end-screen positioning cylinder disposed on the inner wall of the dielectric loss test bench, an end-screen positioning blocking block disposed on the inner side of the end-screen positioning cylinder, an end-screen wiring block disposed on the inner side of the end-screen positioning cylinder, and a wiring ring electrically connected to the dielectric loss tester disposed on the outer side of the end-screen wiring block. The positioning and collecting mechanism includes a positioning telescopic column, which is disposed on the inner wall of the terminal wiring positioning ring and the end screen positioning column. The inner wall of the dielectric loss test bench is provided with a dielectric loss temporary fixing groove, and the inner wall of the dielectric loss test bench is provided with a positioning and collecting bracket that is engaged with the positioning telescopic column.

[0008] Preferably, the top of the detection sleeve is provided with a wiring terminal, the bottom of the detection sleeve is provided with a wiring flange, and the outer side of the wiring flange is provided with a terminal block and a drain plug.

[0009] Preferably, multiple detection positioning grooves are provided, and the multiple detection positioning grooves are equally spaced on the top of the dielectric loss test bench, and the inner wall of the detection positioning groove is in contact with the outer surface of the detection sleeve.

[0010] Preferably, the outer side of the detection clamping post is provided with an outwardly protruding contact piece, the detection clamping post is configured as a prism, and the prism of the detection clamping post is rounded.

[0011] Preferably, multiple detection clamping blocks are provided, and the multiple detection clamping blocks are parallel to the outer plane of the detection clamping column. The inner side of each detection clamping block is provided with a conductive sheet electrically connected to the connecting coil, and the outer side of each detection clamping block is provided with an electro-hydraulic cylinder.

[0012] Preferably, a buffer pad is provided on the left side of the end screen positioning blocking block, and a rotating column is provided on the back side of the end screen positioning blocking block, and a positioning slot is provided on the back side of the end screen positioning blocking block.

[0013] Preferably, a wiring groove is provided on the right side of the terminal screen wiring block, and a wiring arc block is provided inside the wiring groove. The inner wall of the wiring arc block is sleeved with the outer surface of the detection sleeve, and the wiring arc block is electrically connected to the wiring ring.

[0014] Preferably, the outer side of the end screen wiring block is provided with a snap-fit ​​telescopic post, and the inner side of the end screen wiring block is snapped into the outer side of the positioning slot.

[0015] Preferably, the outer surface of the positioning telescopic column is provided with a telescopic spring, and the positioning telescopic column is located inside the dielectric loss temporary fixing groove before testing, located on the inner wall of the terminal wiring positioning ring and the end screen positioning column during testing, and located on the inner wall of the positioning collection bracket after testing.

[0016] Preferably, the inner wall of the positioning and collecting bracket is provided with a positioning slider that engages with the positioning telescopic column, a buffer spring is provided on the left side of the positioning slider, and a gradually changing blocking slider is provided on the inner wall of the positioning and collecting bracket, and a compression spring is provided on the right side of the gradually changing blocking slider.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When conducting dielectric loss tests on transformer bushings with different orientations, it is necessary to repeatedly adjust the wiring direction of the wiring mechanism, which reduces the testing efficiency. By setting up devices such as a bushing connection mechanism, a terminal wiring positioning mechanism, and a final screen wiring positioning mechanism to work together, when it is necessary to conduct dielectric loss tests on transformer bushings, the terminal wiring positioning mechanism and the final screen wiring positioning mechanism are used to position the wiring parts of the bushing that need to be connected in the correct or reverse direction, and connect them to the dielectric loss tester. This eliminates the need to repeatedly adjust the wiring direction of the wiring mechanism and improves the testing efficiency of the bushing.

[0018] 2. By using a combination of devices such as a positioning telescopic column, a temporary fixing groove for dielectric loss, and a positioning collection bracket, after the dielectric loss test is completed by the test sleeve, the positioning telescopic column and the squeezing positioning slider drive the gradual blocking slider to move to the right, causing the left positioning slider to engage with the next rolling test sleeve, thus completing the separation positioning collection operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a transformer bushing dielectric loss testing device proposed in this invention; Figure 2 This is a schematic diagram of the detection bushing structure of a transformer bushing dielectric loss testing device proposed in this invention; Figure 3 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the positioning cylindrical structure of the end screen of a transformer bushing dielectric loss testing device proposed in this invention; Figure 5 This is a schematic diagram of the positioning and collecting support structure of a transformer bushing dielectric loss testing device proposed in this invention; Figure 6 This is a schematic diagram of the temporary fixing groove structure of a transformer bushing dielectric loss testing device proposed in this invention; Figure 7 This is a circuit diagram of the main insulation dielectric loss detection circuit of the transformer bushing, which is connected to the transformer bushing, according to the present invention. Figure 8 The circuit diagram for detecting dielectric loss at the end screen of a transformer bushing in reverse connection is provided in this invention.

[0020] In the diagram: 1. Dielectric loss test bench; 2. Dielectric loss detector; 3. Test sleeve; 31. Terminal block; 32. Wiring flange; 321. End screen terminal block; 322. Drain plug; 4. Terminal wiring positioning mechanism; 41. Test positioning groove; 42. Terminal wiring positioning ring; 43. Test clamping post; 431. Contact piece; 44. Test clamping block; 441. Electro-hydraulic cylinder; 45. Connecting coil; 5. End screen wiring positioning mechanism; 51. End screen positioning cylinder; 52. End screen positioning blocking block; 521. Rotating column; 53. End screen wiring block; 531. Wiring arc block; 532. Snap-fit ​​telescopic post; 54. Wiring ring; 6. Positioning and collecting mechanism; 61. Positioning telescopic post; 62. Temporary dielectric loss fixing groove; 63. Positioning and collecting bracket; 631. Positioning slider; 632. Buffer spring; 633. Gradient blocking slider; 634. Compression spring. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0022] Reference Figure 1-8 A transformer bushing dielectric loss testing device includes a dielectric loss testing platform 1, a dielectric loss detector 2 installed on the top of the dielectric loss testing platform 1, a testing bushing 3 installed on the top of the dielectric loss testing platform 1, a terminal block 31 installed on the top of the testing bushing 3, a wiring flange 32 installed at the bottom of the testing bushing 3, and a final screen terminal block 321 and an oil drain plug 322 installed on the outer side of the wiring flange 32, a terminal wiring positioning mechanism 4 installed on the top of the dielectric loss testing platform 1, a final screen wiring positioning mechanism 5 installed on the front of the terminal wiring positioning mechanism 4, and a positioning and collecting mechanism 6 installed on the inner wall of the dielectric loss testing platform 1. Through the above technical solution, the dielectric loss detector 2 is equipped with two sets: one set connected in the forward direction to detect the dielectric loss of the main insulation of the transformer bushing, and the other set connected in the reverse direction to detect the dielectric loss of the final screen of the transformer bushing. The dielectric loss test principle of the transformer bushing is referenced. Figure 7 Positive connection to transformer bushing for main insulation dielectric loss and Figure 8Circuit diagram of dielectric loss at the end screen of the reverse-connected transformer bushing; Based on the above, when conducting dielectric loss tests on transformer bushings, the test bushing 3 is placed on top of the inclined dielectric loss test bench 1, and the bushing terminals and the end screen are connected during the rolling process through the terminal wiring positioning mechanism 4 and the end screen wiring positioning mechanism 5. After the test is completed, the rolling test bushing 3 is directionally separated and collected through the positioning and collection mechanism 6.

[0023] like Figure 1-3 As shown, the terminal wiring positioning mechanism 4 includes a detection positioning groove 41 disposed on the inner wall of the dielectric loss test bench 1. Multiple detection positioning grooves 41 are provided, and the multiple detection positioning grooves 41 are evenly distributed on the top of the dielectric loss test bench 1. The inner wall of the detection positioning groove 41 is in contact with the outer surface of the detection sleeve 3. A terminal wiring positioning ring 42 is provided on the inner wall of the dielectric loss test bench 1. A detection clamping post 43 is provided on the inner side of the terminal wiring positioning ring 42. A detection clamping block 44 is provided on the outer side of the detection clamping post 43. A wire coil 45 electrically connected to the dielectric loss detector 2 is provided on the outer side of the terminal wiring positioning ring 42. Through the above technical solution, when the terminal 31 rotates and adheres to the outer surface of the detection clamping column 43, it drives the detection clamping block 44 to move closer to the detection clamping column 43, fixing the terminal 31 between the detection clamping column 43 and the detection clamping block 44, and electrically connecting the connected terminal 31 to the dielectric loss detector 2 through the connecting coil 45.

[0024] Specifically, the outer side of the detection clamping post 43 is provided with an outwardly protruding contact piece 431. The detection clamping post 43 is prism-shaped and the corners of the prism are rounded. Multiple detection clamping blocks 44 are provided, and the multiple detection clamping blocks 44 are parallel to the outer plane of the detection clamping post 43. The inner side of the detection clamping block 44 is provided with a conductive piece that is electrically connected to the connecting coil 45. The outer side of the detection clamping block 44 is provided with an electro-hydraulic cylinder 441.

[0025] With the above technical solution, as the detection sleeve 3 rotates, the terminal 31 is attached to the outer surface of the detection clamping post 43, which squeezes the contact piece 431, thereby conducting the electro-hydraulic cylinder 441, driving the detection clamping block 44 to squeeze inward, and stabilizing the terminal 31.

[0026] like Figure 4 As shown, the end screen wiring positioning mechanism 5 includes an end screen positioning cylinder 51 disposed on the inner wall of the dielectric loss test bench 1, an end screen positioning blocking block 52 disposed on the inner side of the end screen positioning cylinder 51, an end screen wiring block 53 disposed on the inner side of the end screen positioning cylinder 51, and a wiring ring 54 electrically connected to the dielectric loss detector 2 disposed on the outer side of the end screen wiring block 53. With the above technical solution, the end screen wiring block 53 is set on the periphery of the end screen positioning blocking block 52. When the end screen positioning blocking block 52 is squeezed and rotated by the end screen wiring post 321, the obstruction on the end screen wiring block 53 is released, making it easier to attach the end screen wiring block 53 to its surface in the direction close to the end screen wiring post 321, and to electrically connect the end screen wiring post 321 to the dielectric loss detector 2 through the wiring ring 54.

[0027] Specifically, a buffer pad is provided on the left side of the end screen positioning block 52, and a rotating column 521 is provided on the back of the end screen positioning block 52. A positioning slot is provided on the back of the end screen positioning block 52. A snap-fit ​​telescopic column 532 is provided on the outside of the end screen wiring block 53. The inside of the end screen wiring block 53 is snapped into the outside of the positioning slot. A wiring groove is provided on the right side of the end screen wiring block 53, and a wiring arc block 531 is provided inside the wiring groove. The inner wall of the wiring arc block 531 is sleeved with the outer surface of the detection sleeve 3, and the wiring arc block 531 is electrically connected to the wiring ring 54.

[0028] Through the above technical solution, when the end screen positioning blocking block 52 rotates clockwise, the end screen wiring block 53 moves inward by engaging the telescopic column 532, and causes the wiring arc block 531 to fit against the outer surface of the end screen wiring post 321, thus completing the wiring positioning operation of the end screen wiring post 321.

[0029] like Figure 5 and Figure 6 As shown, the positioning and collecting mechanism 6 includes a positioning telescopic column 61, which is disposed on the inner wall of the terminal wiring positioning ring 42 and the end screen positioning cylinder 51. The inner wall of the dielectric loss test bench 1 is provided with a dielectric loss temporary fixing groove 62. The inner wall of the dielectric loss test bench 1 is provided with a positioning and collecting bracket 63 that is engaged with the positioning telescopic column 61. The outer surface of the positioning telescopic column 61 is provided with a telescopic spring. Before the test, the positioning telescopic column 61 is located inside the dielectric loss temporary fixing groove 62. During the test, it is located on the inner wall of the terminal wiring positioning ring 42 and the end screen positioning cylinder 51. After the test, it is located on the inner wall of the positioning and collecting bracket 63.

[0030] With the above technical solution, before testing, the positioning telescopic column 61 is temporarily fixed by the left-side limiting and right-side sliding dielectric loss temporary fixing groove 62. When the test sleeve 3 drives the terminal wiring positioning ring 42 and the end screen positioning column 51 to rotate to the right simultaneously, the positioning telescopic column 61 is driven to retract into the two, so that the dielectric loss tester 2 can perform corresponding dielectric loss testing on the test sleeve 3 in the positive and negative connection mode. Then, after the test is completed, the falling test sleeve 3 is collected one by one by the positioning collection bracket 63, thereby completing the temporary fixing of the terminal wiring positioning ring 42 and the end screen positioning column 51 and the positioning, separation and collection operation of the transformer bushing after testing.

[0031] Specifically, the inner wall of the positioning and collecting bracket 63 is provided with a positioning slider 631 that engages with the positioning telescopic column 61. A buffer spring 632 is provided on the left side of the positioning slider 631, and a gradually changing blocking slider 633 is provided on the inner wall of the positioning and collecting bracket 63. A compression spring 634 is provided on the right side of the gradually changing blocking slider 633.

[0032] Through the above technical solution, when the positioning telescopic column 61 squeezes the positioning slider 631, it squeezes the buffer spring 632, causing the gradual blocking slider 633 to move to the right, exposing the positioning collection groove formed between the left positioning slider 631 and the positioning collection bracket 63, waiting for the next detection sleeve 3 to roll off.

[0033] In this invention, when performing dielectric loss tests on transformer bushings, the test bushing 3 is placed longitudinally on the top of the dielectric loss test bench 1, and the longitudinal position of the test bushing 3 is positioned by the outer surface of the test bushing 3 being in contact with the test positioning groove 41. Then, the terminal wiring positioning ring 42 and the end screen positioning cylinder 51 are used to position the end screen wiring post 321 on the outer surface of the wiring terminal 31 and the wiring flange 32. The connection is made to the wiring piece of the dielectric loss detector 2 through the connection coil 45 and the connection ring 54. Thus, by connecting the test bushing 3 in both directions, the main insulation dielectric loss and the end screen dielectric loss of the test bushing 3 can be tested. Furthermore, when positioning the terminal 31, the terminal 31 is rotated to fit against the outer surface of the detection clamping post 43, and the contact piece 431 is squeezed. This activates the electro-hydraulic cylinder 441, which drives the detection clamping block 44 to stabilize the terminal 31 on the outer surface of the terminal positioning ring 42. As the detection sleeve 3 rotates, the terminal positioning ring 42 rotates synchronously, thus completing the positioning operation of the terminal 31. Furthermore, when positioning the terminal block 321, the terminal block 321 is rotated to the left of the terminal block 52 and pressed, causing the terminal block 52 to rotate clockwise and release its obstruction of the terminal block 53. This allows the terminal block 53 to move towards the center of the terminal block 51, covering the terminal block 321. As the terminal block 31 continues to rotate, the terminal block 51 continues to rotate, completing the wiring positioning operation of the terminal block 321. Furthermore, the inner wall of the end screen positioning cylinder 51 is provided with an arc-shaped groove to limit the rotation arc of the end screen positioning blocking block 52, so as to prevent the end screen positioning blocking block 52 from rotating excessively and not being able to fit with the wiring arc block 531 and disconnect the electrical connection from the wiring ring 54. Furthermore, two sets of dielectric loss detectors 2 are installed on the top of the dielectric loss test bench 1. One set is connected to the positive test sleeve 3 to detect the main insulation dielectric loss, and the other set is connected to the negative test sleeve 3 to detect the end screen dielectric loss. In addition, a wire connection slider is provided on the inner wall of the dielectric loss test bench 1, which is slidably connected to the outer surface of the connection coil 45 and the connection ring 54, so as to facilitate the establishment of electrical connection at the corresponding part of the test sleeve 3 when the terminal connection positioning ring 42 and the end screen positioning cylinder 51 rotate. Based on the above, before testing, the positioning telescopic column 61 is temporarily fixed by the left-side limiting and right-side sliding dielectric loss temporary fixing groove 62. When the test sleeve 3 drives the terminal wiring positioning ring 42 and the end screen positioning column 51 to rotate to the right simultaneously, the positioning telescopic column 61 is driven to retract into the two, so that the dielectric loss tester 2 can perform corresponding dielectric loss testing on the test sleeve 3 in the positive and negative connection mode. Then, after the test is completed, the falling test sleeve 3 is collected one by one by the positioning collection bracket 63, thereby completing the temporary fixing of the terminal wiring positioning ring 42 and the end screen positioning column 51 and the positioning, separation and collection operation of the transformer bushing after the test. Furthermore, after the test is completed, when the test sleeve 3 drives the terminal wiring positioning ring 42 and the end screen positioning cylinder 51 to fall into the positioning and collection bracket 63, it squeezes the positioning slider 631, causing the gradual blocking slider 633 to move to the right, exposing the collection limiting groove formed between the subsequent positioning slider 631 and the positioning and collection bracket 63, and positioning and collecting the next rolling test sleeve 3, thereby completing the separation, positioning and collection operation of multiple test sleeves 3. Furthermore, a groove for placing a terminal wiring positioning ring 42 and a final screen positioning cylinder 51 is provided on the left side of the dielectric loss test bench 1. After a test bushing 3 completes testing and positioning, the terminal wiring positioning ring 42 and the final screen positioning cylinder 51 are temporarily fixed inside the dielectric loss temporary fixing groove 62 by the positioning telescopic column 61, waiting for the next test bushing 3 to roll down, thus completing the pre-set operation of the positioning mechanism for continuous testing of transformer bushings.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transformer bushing dielectric loss testing device, comprising a dielectric loss testing bench (1), characterized in that, The dielectric loss test bench (1) is provided with a dielectric loss detector (2) on the top, a test sleeve (3) on the top, a terminal wiring positioning mechanism (4) on the top, a terminal wiring positioning mechanism (5) on the front of the terminal wiring positioning mechanism (4), and a positioning and collecting mechanism (6) on the inner wall of the dielectric loss test bench (1). The terminal wiring positioning mechanism (4) includes a detection positioning groove (41) disposed on the inner wall of the dielectric loss test bench (1), a terminal wiring positioning ring (42) disposed on the inner wall of the dielectric loss test bench (1), a detection clamping column (43) disposed on the inner side of the terminal wiring positioning ring (42), a detection clamping block (44) disposed on the outer side of the detection clamping column (43), and a connection coil (45) electrically connected to the dielectric loss tester (2) disposed on the outer side of the terminal wiring positioning ring (42). The end screen wiring positioning mechanism (5) includes an end screen positioning cylinder (51) disposed on the inner wall of the dielectric loss test bench (1), an end screen positioning blocking block (52) disposed on the inner side of the end screen positioning cylinder (51), and an end screen wiring block (53) disposed on the inner side of the end screen positioning cylinder (51), and a wiring ring (54) electrically connected to the dielectric loss tester (2) disposed on the outer side of the end screen wiring block (53). The positioning and collecting mechanism (6) includes a positioning telescopic column (61), which is disposed on the inner wall of the terminal wiring positioning ring (42) and the end screen positioning column (51). The inner wall of the dielectric loss test bench (1) is provided with a dielectric loss temporary fixing groove (62), and the inner wall of the dielectric loss test bench (1) is provided with a positioning and collecting bracket (63) that is engaged with the positioning telescopic column (61).

2. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, The top of the detection sleeve (3) is provided with a wiring terminal (31), the bottom of the detection sleeve (3) is provided with a wiring flange (32), and the outside of the wiring flange (32) is provided with a terminal block (321) and a drain plug (322).

3. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, The detection positioning groove (41) is provided in multiple ways, and the multiple detection positioning grooves (41) are equally spaced on the top of the dielectric loss test bench (1). The inner wall of the detection positioning groove (41) is in contact with the outer surface of the detection sleeve (3).

4. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, The outer side of the detection clamping post (43) is provided with an outwardly protruding contact piece (431). The detection clamping post (43) is set in a prism shape, and the corners of the prism of the detection clamping post (43) are rounded.

5. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, Multiple detection clamping blocks (44) are provided, and the multiple detection clamping blocks (44) are parallel to the outer plane of the detection clamping column (43). The inner side of the detection clamping block (44) is provided with a conductive sheet that is electrically connected to the connecting coil (45), and the outer side of the detection clamping block (44) is provided with an electro-hydraulic cylinder (441).

6. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, A buffer pad is provided on the left side of the end screen positioning blocking block (52), and a rotating column (521) is provided on the back side of the end screen positioning blocking block (52). A positioning slot is provided on the back side of the end screen positioning blocking block (52).

7. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, The right side of the terminal screen wiring block (53) is provided with a wiring groove, and the wiring groove is provided with a wiring arc block (531). The inner wall of the wiring arc block (531) is sleeved with the outer surface of the detection sleeve (3), and the wiring arc block (531) is electrically connected to the wiring ring (54).

8. The transformer bushing dielectric loss testing device according to claim 6, characterized in that, The outer side of the end screen wiring block (53) is provided with a snap-fit ​​telescopic post (532), and the inner side of the end screen wiring block (53) is snapped with the outer side of the positioning slot.

9. The transformer bushing dielectric loss testing device according to claim 1, characterized in that, The outer surface of the positioning telescopic column (61) is provided with a telescopic spring, and the positioning telescopic column (61) is located inside the dielectric loss temporary fixing groove (62) before the test, is located on the inner wall of the terminal wiring positioning ring (42) and the end screen positioning column (51) during the test, and is located on the inner wall of the positioning collection bracket (63) after the test.

10. A transformer bushing dielectric loss testing device according to claim 1, characterized in that, The inner wall of the positioning and collecting bracket (63) is provided with a positioning slider (631) that engages with the positioning telescopic column (61). A buffer spring (632) is provided on the left side of the positioning slider (631), and a gradient blocking slider (633) is provided on the inner wall of the positioning and collecting bracket (63). A compression spring (634) is provided on the right side of the gradient blocking slider (633).

Images