A transformer test structure with horizontal and axially movable coils

Abstract

The present invention belongs to the technical field of transformer manufacturing, and particularly relates to a transformer test structure with a coil that can move horizontally and axially. The transformer test structure with a coil that can move horizontally and axially comprises a box body, in which an inner coil and an outer coil are arranged, and is characterized in that: a first end ring is arranged below the inner coil, the first end ring is connected to a wooden board, the wooden board is connected to a U-shaped plate, the U-shaped plate is connected to the screw flange end of a horizontally movable screw lifter, the upper and lower ends of the outer coil are clamped by a second end ring and a hanging plate, a guide rod is connected between the hanging plate and the second end ring, and the hanging plate is fixed to the flange joint of the axially movable screw lifter. The beneficial effects of the present invention are: the horizontal movement of the inner coil of the transformer and the axial movement of the outer coil are realized, the structure is simple, the cost is low, the installation and operation are convenient, the displacement is accurate and reliable, and the test requirements are effectively met.

Description

1. Technical field

[0002] The invention belongs to the technical field of transformer manufacturing, and in particular relates to a transformer test structure with a coil capable of horizontal and axial movement. 2. Background technology

[0004] Short-circuit impedance is an important parameter of power transformers, which is related to the strength of the transformer's ability to resist short circuits. In recent years, statistics on large-scale power transformer accidents across the country show that short-circuit accidents caused by insufficient short-circuit strength have become the primary cause of transformer accidents. Users are paying more and more attention to the transformer's ability to resist short circuits. After the transformer is short-circuited, the short-circuit force will cause the coil to be destroyed and displaced. How the short-circuit impedance parameters of the transformer change after a short circuit is a major technical problem in the transformer industry. (III) Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention provides a transformer test structure with a coil that can move horizontally and axially, which has the advantages of simple structure, low cost, convenient installation and operation, and accurate and reliable displacement.

[0007] The present invention is achieved through the following technical solutions:

[0008] A transformer test structure with a coil that can move horizontally and axially, includes a box body, in which an inner coil and an outer coil are arranged, and is characterized in that a first end ring is arranged below the inner coil, the first end ring is connected to a wooden board, the wooden board is connected to a U-shaped plate, the U-shaped plate is connected to a screw flange end of a horizontally movable screw lifter, the upper and lower ends of the outer coil are clamped by a second end ring and a hanging plate, a guide rod is connected between the hanging plate and the second end ring, and the hanging plate is fixed to a flange joint of the axially movable screw lifter.

[0009] A supporting plate is provided below the first end ring.

[0010] A plurality of steel plates are embedded on the support plate, and a universal ball is installed between the upper part of the steel plate and the first end ring.

[0011] The axially movable screw rod elevator is installed on the box cover.

[0012] The beneficial effects of the present invention are: the horizontal movement of the inner coil of the transformer and the axial movement of the outer coil are achieved, the structure is simple, the cost is low, the installation and operation are convenient, the displacement is accurate and reliable, and the test requirements are effectively met. (IV) Description of the drawings

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Attached Figure 1 It is a schematic diagram of the horizontal movement structure of the coil of the present invention;

[0016] Attached Figure 2It is a schematic diagram of the coil axial movement structure of the present invention;

[0017] In the figure, 1 is a box body, 2 is an inner coil, 3 is an outer coil, 4 is a first end circle, 5 is a wooden board, 6 is a U-shaped board, 7 is a horizontally movable screw lift, 8 is a second end circle, 9 is a hanging plate, 10 is a guide rod, 11 is an axially movable screw lift, 12 is a supporting plate, 13 is a steel plate, 14 is a universal ball, and 15 is a box cover. (V) Specific implementation methods

[0019] The accompanying drawings are a specific embodiment of the present invention. This embodiment includes a box body 1, in which an inner coil 2 and an outer coil 3 are arranged, a first end ring 4 is arranged below the inner coil 2, the first end ring 4 is connected to a wooden board 5, the wooden board 5 is connected to a U-shaped plate 6, the U-shaped plate 6 is connected to the screw flange end of a horizontally movable screw lift 7, the upper and lower ends of the outer coil 3 are clamped by a second end ring 8 and a hanging plate 9, a guide rod 10 is connected between the hanging plate 9 and the second end ring 8, and the hanging plate 9 is fixed to the flange joint of the axially movable screw lift 11. A support plate 12 is arranged below the first end ring 4. A plurality of steel plates 13 are embedded on the support plate 12, and a universal ball 14 is installed between the upper part of the steel plate 13 and the first end ring 4. The axially movable screw lift 11 is installed on the box cover 15.

[0020] The transformer test structure with coils capable of horizontal and axial movement of the present invention is adopted, and eight universal balls 14 are installed on the support plate 12 of the low-voltage coil (inner coil 2), which are placed in eight holes opened below the first end ring 4. The first end ring 4 has threaded holes at both ends for connection with the wooden board 5. Eight grooves are opened at corresponding positions of the support plate 12, and a steel plate 13 is embedded in each groove for bearing weight and reducing the rolling friction of the universal ball 14. The first end ring 4 is connected to the screw flange end of the horizontally movable screw lift 7 through the wooden board 5 and the U-shaped plate 6. The hand wheel is shaken, and according to the turbine deceleration principle, the first end ring 4 is driven by the screw to realize the precise horizontal movement of the low-voltage coil (inner coil 2). Install the axially movable screw lifter 11 on the box cover 15, build the high-voltage coil (outer coil 3) into a hoisting structure through the hanging plate 9 and the guide rod 10, fix the flange joint of the axially movable screw lifter 11 to the hanging plate 9, and turn the handwheel of the axially movable screw lifter 11 to axially move the high-voltage coil (outer coil 3); set a ruler in the horizontal and axial directions to measure the moving distance. Use the universal ball 14 and the screw lifter to move the inner and outer coils of the transformer horizontally and axially, simulate the short-circuit situation, and study the influence of the height difference of different axes and different reactances of each coil of the transformer on the short-circuit impedance of the transformer.

Claims

1. A transformer test structure with a coil that can move horizontally and axially, comprising a box (1), wherein an inner coil (2) and an outer coil (3) are arranged in the box (1), wherein: A first end ring (4) is provided below the inner coil (2), the first end ring (4) is connected to a wooden board (5), the wooden board (5) is connected to a U-shaped plate (6), the U-shaped plate (6) is connected to a screw flange end of a horizontally movable screw lift (7), the upper and lower ends of the outer coil (3) are clamped by a second end ring (8) and a hanging plate (9), a guide rod (10) is connected between the hanging plate (9) and the second end ring (8), the hanging plate (9) is fixed to a flange joint of an axially movable screw lift (11), and the first end ring (4) is provided with a support plate (12) below, a plurality of steel plates (13) are embedded on the support plate (12), a universal ball (14) is installed between the upper part of the steel plate (13) and the first end ring (4), and the axially movable screw lifter (11) is installed on the box cover (15); 8 universal balls (14) are installed on the support plate (12) of the inner coil (2), which are placed in 8 holes opened below the first end ring (4), and the first end ring (4) has screw holes at both ends for connection with the wooden board (5), and the support plate (12) is at a corresponding position Eight grooves are opened, and a steel plate (13) is embedded in each groove to bear the weight and reduce the rolling friction of the universal ball (14). The first end ring (4) is connected to the screw flange end of the horizontal moving screw lift (7) through the wooden board (5) and the U-shaped plate (6). The hand wheel is shaken, and according to the turbine deceleration principle, the screw drives the first end ring (4) to realize the horizontal precise movement of the inner coil (2); the axial moving screw lift (11) is installed on the box cover (15), and the axial moving screw lift (11) is connected to the box cover (15) through the hanging plate (9) and the guide rod. (10) The outer coil (3) is constructed into a hanging structure, the flange joint of the axially movable screw lift (11) is fixed to the hanging plate (9), and the hand wheel of the axially movable screw lift (11) is turned to axially move the outer coil (3); scales are set in the horizontal and axial directions to measure the moving distance, and the inner and outer coils of the transformer are moved horizontally and axially by the universal ball (14) and the screw lift to simulate the short-circuit condition to study the influence of the different axes and different reactance height differences of the transformer coils on the short-circuit impedance of the transformer.

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