Power supply device for transformer field test

Abstract

The utility model relates to a power supply device for a transformer field test, which comprises a movable box body, a dry-type transformer and a voltage regulator are arranged in the box body, a cable reel rotationally connected with the box body is arranged outside the box body, a connecting cable is wound on the cable reel, an input end of the dry-type transformer is connected with an external power supply, and an output end of the dry-type transformer is connected with a power supply. The output end of the dry-type transformer is connected with the input end of the voltage regulator, the output end of the voltage regulator is connected with the transformer to be tested through the connecting cable, and the technical problem that convenient and efficient field test cannot be carried out in the prior art can be solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of transformer performance testing equipment, specifically relating to a power supply device for on-site transformer testing. Background Technology

[0002] With the vigorous development of the national economy and the accelerated construction of power grids, the scale of power grids is expanding daily, and short-circuit capacity is also increasing steadily. This places unprecedentedly high demands on the safe and stable operation of transformers. Against this backdrop, meticulous safety and reliability testing of transformers is particularly important. The traditional approach is to move the transformer under test to a dedicated test area and supply it with power from a power supply unit to complete a series of functional tests. However, with the rise of ultra-high voltage and extra-high voltage transmission technologies, the size and weight of transformers have become extremely difficult to move. Coupled with the inherent immobility limitations of power supply units, it is impossible to flexibly conduct on-site testing at any time and place. Utility Model Content

[0003] In view of the various shortcomings of the existing technology, a power supply device for transformer field testing is proposed to solve the technical problem that the existing technology cannot carry out convenient and efficient field testing.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A power supply device for on-site transformer testing includes a movable enclosure. Inside the enclosure are a dry-type transformer and a voltage regulator. Outside the enclosure is a cable reel rotatably connected to it, with connecting cables wound on the cable reel. The input terminal of the dry-type transformer is connected to an external power source, and the output terminal of the dry-type transformer is connected to the input terminal of the voltage regulator. The output terminal of the voltage regulator is connected to the transformer under test via a connecting cable.

[0006] The technical solution is further configured such that the housing is positioned above the base, and the base is provided with casters. The dry-type transformer and the voltage regulator are both positioned above the base.

[0007] The technical solution is further configured such that a connecting plate is provided at the end of the base, a first strip groove is provided on the connecting plate, a second strip groove is provided on the box body, and a first connecting member passes through the first strip groove and the second strip groove and locks them.

[0008] The technical solution is further configured such that the first strip groove is arranged in a horizontal direction, and the second strip groove is perpendicular to the first strip groove.

[0009] The technical solution is further configured such that the enclosure includes a first enclosure and a second enclosure, the height of the first enclosure is greater than the height of the second enclosure, and the cable reel is disposed on the side wall of the first enclosure and located above the second enclosure.

[0010] The technical solution is further configured such that a cable hook is provided on the outside of the first housing, the cable hook including an integrally formed connecting part, a bearing part and a limiting part, the connecting part being connected to the side wall of the first housing, and the connecting part, the bearing part and the limiting part forming a receiving cavity for accommodating the connecting cable.

[0011] The technical solution is further configured such that the limiting part is parallel to the connecting part, the end of the limiting part is inclined towards the connecting part to form a blocking part, and there is a gap between the blocking part and the connecting part.

[0012] The technical solution is further configured such that a handrail is provided above the second box, the handrail is connected to the second box via a handrail seat, and two handrails are symmetrically arranged.

[0013] The technical solution is further configured such that the armrest seat is provided with an arc-shaped groove, and the second connector passes through the arc-shaped groove and the armrest and locks it in place.

[0014] The beneficial effects of this utility model are:

[0015] The combination of dry-type transformers and voltage regulators enables a stable, safe, and efficient power supply. At the same time, it can precisely adjust the output voltage of the power supply device to ensure that the transformer under test can be tested in a stable voltage environment. The dry-type transformer and voltage regulator are integrated into the enclosure, which is also free to move. The power supply device can be moved to the transformer under test as needed. It is easy to operate, highly mobile, and enables convenient and efficient on-site testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a power supply device used for on-site transformer testing in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram from another perspective of the power supply device used for on-site transformer testing in an embodiment of this utility model;

[0018] Figure 3 yes Figure 1 Partial schematic diagram at point A in the middle;

[0019] Figure 4 yes Figure 2 Partial schematic diagram at point B in the middle;

[0020] Figure 5This is a schematic diagram of the assembly of the handrail and handrail base in an embodiment of this utility model.

[0021] In the attached diagram: 1. First housing; 2. Second housing; 3. Instrument housing; 4. Base; 5. Cable hook; 501. Connecting part; 502. Bearing part; 503. Limiting part; 504. Blocking part; 6. Cable reel; 7. Handrail; 8. Crank handle; 9. Handrail base; 10. Connecting plate; 11. First strip groove; 12. Second strip groove; 13. First connector; 14. Arc groove; 15. Second connector. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0023] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0024] According to an embodiment of this utility model, a power supply device for on-site transformer testing is provided. Please refer to [link / reference]. Figures 1 to 4 The device includes a movable enclosure, inside which a dry-type transformer and a voltage regulator are installed. Outside the enclosure, a cable reel 6 is rotatably connected to the reel, on which a connecting cable is wound. The input end of the dry-type transformer is connected to an external power source, and the output end of the dry-type transformer is connected to the input end of the voltage regulator. The output end of the voltage regulator is connected to the transformer under test via a connecting cable.

[0025] It should be noted that the combination of dry-type transformer and voltage regulator can achieve a stable, safe and efficient power supply. At the same time, it can accurately adjust the output voltage of the power supply device to ensure that the transformer under test can be tested in a stable voltage environment. The dry-type transformer and voltage regulator are integrated into the enclosure, which is also free to move. The power supply device can be moved to the transformer under test as needed. It is easy to operate, highly mobile, and can realize convenient and efficient on-site testing.

[0026] During operation, the external power supply is first connected to the primary winding of the dry-type transformer. The dry-type transformer transforms the voltage to the required intermediate voltage level and outputs it to the input terminal of the voltage regulator. The voltage regulator further adjusts the voltage provided by the dry-type transformer to ensure that the voltage supplied to the transformer under test is stable and accurate. This configuration combination allows for significant voltage changes followed by fine adjustment.

[0027] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 The housing is positioned above the base 4, and casters are provided below the base 4. The dry-type transformer and the voltage regulator are both positioned above the base 4.

[0028] Furthermore, the wheels are equipped with brakes.

[0029] Furthermore, in order to achieve effective heat dissipation, ventilation holes are provided on the side walls of the enclosure.

[0030] Furthermore, an instrument box 3 is installed on the side wall of the enclosure. An ammeter, voltmeter and other instruments can be installed on the instrument box 3. These instruments are used to detect test parameters in real time.

[0031] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 The base 4 is provided with a connecting plate 10 at its end. The connecting plate 10 has a first strip groove 11 and the box body has a second strip groove 12. The first connecting piece 13 passes through the first strip groove 11 and the second strip groove 12 and locks them in place. The base 4 and the box body are effectively assembled through the connecting plate 10.

[0032] Furthermore, the connecting plate 10 is configured with an inverted U-shaped structure, with one side connected to the base 4 and a first strip groove 11 provided on the other side. Several first strip grooves 11 are provided along the length of the connecting plate 10. Similarly, a strip groove is also provided on the top of the connecting plate 10, which is connected to a dry-type transformer or voltage regulator by bolts.

[0033] Specifically, the first connector 13 uses a screw, which is tightened with a nut.

[0034] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 The first strip groove 11 is arranged in a horizontal direction, and the second strip groove 12 is perpendicular to the first strip groove 11.

[0035] It should be noted that the first strip groove 11 provides adjustment margin in the horizontal direction, while the second strip groove 12 provides adjustment margin in the vertical direction. This vertical cross design allows the box to be flexibly adjusted in two orthogonal directions and achieve spatial positioning.

[0036] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 The enclosure includes a first enclosure 1 and a second enclosure 2. The height of the first enclosure 1 is greater than the height of the second enclosure 2. The cable reel 6 is disposed on the side wall of the first enclosure 1 and located above the second enclosure 2.

[0037] Specifically, considering the size difference between the dry-type transformer and the voltage regulator, the inventors installed the dry-type transformer inside the first enclosure 1 and the voltage regulator inside the second enclosure 2. Meanwhile, the cable reel 6 is installed on the side wall of the first enclosure 1, positioned precisely above the second enclosure 2. This layout makes full use of space and minimizes the overall size of the power supply unit.

[0038] Furthermore, a crank 8 is provided on the cable reel 6, which drives the cable reel 6 to rotate, thereby enabling the cable to be wound up and unwound.

[0039] Furthermore, the surface of the crank handle 8 is evenly covered with anti-slip textures. These textures increase the friction between the hand and the crank handle 8, allowing the operator to grip the crank handle 8 more firmly and prevent it from slipping.

[0040] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 The first housing 1 is provided with a cable hook 5 on its exterior. The cable hook 5 includes an integrally formed connecting part 501, a bearing part 502, and a limiting part 503. The connecting part 501 is connected to the side wall of the first housing 1. The connecting part 501, the bearing part 502, and the limiting part 503 form a receiving cavity for accommodating the connecting cable. The connecting cable that is detached from the cable reel 6 is hung in the receiving cavity in an orderly manner, which can effectively reduce the possibility of the connecting cables tangling together and reduce the risk of wear on the surface of the connecting cable due to dragging or improper operation.

[0041] Furthermore, the connecting part 501 is arranged in a vertical direction, with one end extending in a direction perpendicular to its body and connecting to the side wall of the first housing 1 to improve connection stability.

[0042] Furthermore, the limiting part 503 is parallel to the connecting part 501, and the end of the limiting part 503 is inclined towards the connecting part 501 to form a blocking part 504. The blocking part 504 provides additional safety for the connecting cable hanging in the receiving cavity, preventing the connecting cable from accidentally slipping off. There is a gap between the blocking part 504 and the connecting part 501, allowing the operator to easily hang the connecting cable on the cable hook 5 or remove it.

[0043] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 4 A handrail 7 is provided on the top of the second housing 2. The handrail 7 is connected to the second housing 2 via a handrail base 9. Two handrails 7 are symmetrically arranged. The operator can push or pull the power supply device by holding the handrail 7.

[0044] In the power supply device for transformer field testing in this embodiment, please refer to... Figures 1 to 5 The armrest seat 9 is provided with an arc-shaped groove 14, and the second connector 15 passes through the arc-shaped groove 14 and the armrest 7 and locks it.

[0045] Furthermore, the arc-shaped groove 14 is set in the vertical plane. By changing the relative position of the second connector 15 and the arc-shaped groove 14, the height of the armrest 7 can be adjusted to ensure that operators of different heights can find the most comfortable position.

[0046] Specifically, the second connector 15 uses a screw, which is locked with a nut. The screw and nut work together to effectively fix the handrail 7 in the selected position. Even when it is moved or subjected to external force, the handrail 7 will not easily shift, thus enhancing the safety and stability of use.

[0047] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A power supply device for on-site transformer testing, characterized in that, The device includes a movable enclosure, inside which a dry-type transformer and a voltage regulator are installed. Outside the enclosure, a cable reel is rotatably connected to the reel, and connecting cables are wound on the cable reel. The input terminal of the dry-type transformer is connected to an external power source, and the output terminal of the dry-type transformer is connected to the input terminal of the voltage regulator. The output terminal of the voltage regulator is connected to the transformer under test via a connecting cable.

2. The power supply device for transformer field testing according to claim 1, characterized in that, The housing is positioned above the base, and casters are located below the base. The dry-type transformer and the voltage regulator are both positioned above the base.

3. The power supply device for transformer field testing according to claim 2, characterized in that, The base is provided with a connecting plate at its end. The connecting plate has a first slot, and the box has a second slot. The first connector passes through the first slot and the second slot and locks them in place.

4. The power supply device for transformer field testing according to claim 3, characterized in that, The first strip groove is arranged in a horizontal direction, and the second strip groove is perpendicular to the first strip groove.

5. The power supply device for transformer field testing according to claim 1, characterized in that, The enclosure includes a first enclosure and a second enclosure. The height of the first enclosure is greater than the height of the second enclosure. The cable reel is disposed on the side wall of the first enclosure and located above the second enclosure.

6. The power supply device for transformer field testing according to claim 5, characterized in that, The first housing is provided with a cable hook on the outside. The cable hook includes an integrally formed connecting part, a bearing part, and a limiting part. The connecting part is connected to the side wall of the first housing. The connecting part, the bearing part, and the limiting part form a receiving cavity for accommodating the connecting cable.

7. The power supply device for transformer field testing according to claim 6, characterized in that, The limiting part is parallel to the connecting part, and the end of the limiting part is inclined towards the connecting part to form a blocking part, and there is a gap between the blocking part and the connecting part.

8. The power supply device for transformer field testing according to claim 5, characterized in that, The second housing is provided with a handrail on the top, and the handrail is connected to the second housing via a handrail base. There are two handrails arranged symmetrically.

9. The power supply device for transformer field testing according to claim 8, characterized in that, The armrest seat is provided with an arc-shaped groove, and the second connector passes through the arc-shaped groove and the armrest and locks it in place.

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