Anti-interference shielding case for deformation detection of transformer winding

Abstract

The utility model discloses an anti-interference shielding case for deformation detection of a transformer winding, which relates to the technical field of transformer detection equipment and comprises a shielding case main body and a movable door slidably arranged in the shielding case main body. The shielding cover main body, the movable door and the top plate are arranged to form a shielding structure for wrapping the transformer winding, electromagnetic interference of the external environment on the transformer winding can be isolated in the detection process of the transformer winding, the heat conduction copper pipes are arranged in the middle of the top plate, and the heat conduction copper pipes are provided with the horizontal parts and the inclined parts, so that the heat conduction efficiency is improved. The horizontal part can achieve heat exchange with heat in air in the shielding structure through the heat conduction fins on the outer side of the horizontal part, and the inclined part can achieve heat exchange between heat in the heat conduction copper pipe and outside air through the heat dissipation fins on the outer side of the inclined part. And the transformer winding is prevented from being damaged by heat accumulation while the anti-electromagnetic interference on the transformer winding is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer testing equipment, and in particular to an anti-interference shielding cover for transformer winding deformation detection. Background Technology

[0002] Transformer windings refer to the circuit part of a transformer, made of copper or aluminum wires with high conductivity, and are used in power systems. If the transformer windings deform during operation, it can lead to transformer damage and malfunction. Therefore, transformer winding deformation detectors are often needed to inspect the windings inside the transformer. Transformer winding deformation detectors mainly detect the amplitude-frequency response characteristics of each winding and compare the results longitudinally or laterally. Based on the degree of change in the amplitude-frequency response characteristics, they can determine the possible winding deformation of the transformer, enabling maintenance personnel to promptly address and repair the deformation.

[0003] Electromagnetic interference is a common problem affecting the accuracy of transformer winding deformation detection in existing transformer winding deformation detectors. It mainly comes from electromagnetic interference sources in the test environment and the instrument's own insufficient anti-interference capability. In the existing technology, a metal electromagnetic shield is installed on the outside of the transformer and the detector to isolate the influence of the external environment on the detection process. However, since transformer winding deformation detection needs to last for several hours, the heat generated by the transformer winding will be inside the metal shield, causing the device to overheat and be damaged.

[0004] Therefore, it is necessary to invent an anti-interference shielding cover for transformer winding deformation detection to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an anti-interference shielding cover for transformer winding deformation detection, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference shielding cover for transformer winding deformation detection, comprising a shielding cover body and a movable door slidably disposed inside the shielding cover body. The top of the shielding cover body is provided with a through groove, and a top plate is slidably disposed inside the through groove. The top plate is fixedly disposed on the inner top of the movable door. A plurality of heat-conducting copper pipes are fixedly disposed in the middle of the top plate. A horizontal part is fixedly disposed at the bottom of the heat-conducting copper pipes and is disposed below the top plate. A plurality of heat-conducting fins are horizontally fixedly disposed in the middle of the horizontal part. The plurality of heat-conducting fins are all vertically arranged and are all designed with a wave structure. An inclined part is fixedly disposed at the top of the heat-conducting copper pipes and is disposed above the top plate. A plurality of heat dissipation fins are fixedly disposed in the middle of the inclined part and are designed with an inclined structure. A plurality of cooling fans are horizontally fixedly disposed in sequence on the upper surface of the top plate, and the plurality of cooling fans are respectively disposed at one end of the heat dissipation fins.

[0007] Preferably, the inner walls on both sides of the shielding cover body are provided with sliding grooves, and the two sides of the movable door are fixedly provided with sliders, and the two sliders are respectively slidably disposed in the two sliding grooves.

[0008] Preferably, a drive shaft is rotatably provided at the top of the outer side wall of the shield body, and drive gears are fixed at both ends of the drive shaft. Two racks are fixed on the outer side of the movable door, and the two racks mesh with the two drive gears respectively.

[0009] Preferably, a motor is fixedly installed at the top of the outer side wall of the shield body, and a worm gear transmission box is provided between the output shaft of the motor and one end of the transmission shaft.

[0010] Preferably, the bottom of the shielding cover body is fixedly provided with a track, and a slide is provided above the track. The lower surface of the slide is provided with pulleys at the four corners that are adapted to the track.

[0011] Preferably, a winding deformation detector is fixedly installed in the middle of the outer side wall of the shield body.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model, by setting up a shielding cover body, a movable door, a through slot and a top plate, forms a shielding structure that wraps around the transformer winding. It can isolate the electromagnetic interference of the external environment on the transformer winding during the transformer winding test. By setting multiple heat-conducting copper pipes in the middle of the top plate, the heat-conducting copper pipes have horizontal and inclined parts. The horizontal part can exchange heat with the heat in the air inside the shielding structure through the heat-conducting fins on its outer side, while the inclined part can exchange heat in the heat-conducting copper pipe with the outside air through the heat dissipation fins on its outer side. This not only achieves electromagnetic interference protection for the transformer winding, but also avoids heat accumulation that could damage the transformer winding.

[0014] 2. This utility model features a movable door and a top plate that can move upwards, opening the shielding structure to facilitate the quick placement and removal of transformer windings. Furthermore, after the movable door and top plate move upwards, the front and top of the shielding cover body are open, allowing for rapid exchange of air between the shielding cover body and the outside air. When multiple sets of transformer windings are continuously tested, the movable door and top plate, while facilitating the replacement of transformer windings, can also expel the heated air inside the shielding cover body, ensuring that the internal temperature of the shielding cover body is maintained at a reasonable level. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model in its unfolded state.

[0017] Figure 3 This is a cross-sectional view of the overall structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the top plate structure of this utility model.

[0019] In the diagram: 1. Main body of the shielding cover; 2. Movable door; 3. Through slot; 4. Top plate; 5. Heat-conducting copper pipe; 6. Horizontal section; 7. Heat-conducting fins; 8. Inclined section; 9. Heat dissipation fins; 10. Cooling fan; 11. Slide groove; 12. Slider; 13. Drive shaft; 14. Drive gear; 15. Rack; 16. Motor; 17. Track; 18. Slide table; 19. Pulley; 20. Winding deformation detector. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figure 1-4 An anti-interference shielding cover for transformer winding deformation detection is shown, including a shielding cover body 1 and a movable door 2 that is slidably disposed inside the shielding cover body 1. The top of the shielding cover body 1 is provided with a through groove 3, and a top plate 4 is slidably disposed inside the through groove 3. The top plate 4 is fixedly disposed on the inner top of the movable door 2. The top plate 4 can be inserted into the through groove 3 to achieve sealing of the shielding cover body 1.

[0022] Multiple heat-conducting copper pipes 5 are fixedly installed in the middle of the top plate 4. A horizontal part 6 is fixedly installed at the bottom end of the heat-conducting copper pipes 5 and is located below the top plate 4. Multiple heat-conducting fins 7 are fixedly installed horizontally in the middle of the horizontal part 6. The multiple heat-conducting fins 7 are all vertically arranged and have a wave-shaped structure. During the detection process, the transformer winding releases heat. The heat accumulates in the shield body 1 and heats the air inside the shield body 1. The heated air rises to the top of the shield body 1 and exchanges heat with the wave-shaped heat-conducting fins 7. The wave-shaped structure design increases the contact area between the heat-conducting fins 7 and the air, thereby improving the heat exchange efficiency between them and the air.

[0023] The top end of the heat-conducting copper pipe 5 is fixedly provided with an inclined part 8, which is located above the top plate 4. Multiple heat dissipation fins 9 are fixedly provided in the middle of the inclined part 8, and the heat dissipation fins 9 are designed with an inclined structure. Multiple cooling fans 10 are horizontally and sequentially fixed on the upper surface of the top plate 4, and each of the multiple cooling fans 10 is located at one end of the heat dissipation fins 9. When the cooling fans 10 rotate, they drive air to flow across the surface of the heat dissipation fins 9. The inclined structure design of the heat dissipation fins 9 can increase the range of air flow along its surface, thereby improving the heat exchange effect between it and the air. It should be noted that the heat-conducting copper pipe 5 is provided with a heat-conducting liquid, which can realize the heat transfer between the horizontal part 6 and the inclined part 8. Furthermore, a circulation pump can be added to the heat-conducting copper pipe 5 to improve the circulation efficiency of the heat-conducting liquid.

[0024] The shielding cover body 1 has sliding grooves 11 on both inner walls. The movable door 2 has sliders 12 fixed on both sides. The two sliders 12 are slidably disposed in the two sliding grooves 11. The top of the outer wall of the shielding cover body 1 is rotatably provided with a drive shaft 13. Both ends of the drive shaft 13 are fixed with drive gears 14. The outer side of the movable door 2 is fixed with two racks 15, and the two racks 15 are respectively meshed with the two drive gears 14. The top of the outer wall of the shielding cover body 1 is fixed with a motor 16. The output shaft of the motor 16 is provided with a worm gear transmission box between one end of the drive shaft 13. The worm gear transmission box ensures the self-locking effect of the drive shaft 13 after it stops, so as to ensure the self-locking effect of the movable door 2 after it rises. It should be noted that the motor 16 is equipped with a matching controller and power supply, which can rotate forward and backward as needed.

[0025] The bottom end of the shielding cover body 1 is fixedly provided with a track 17, and a slide 18 is provided above the track 17. The four corners of the lower surface of the slide 18 are provided with pulleys 19 that are adapted to the track 17. The pulleys 19 facilitate the slide 18 to slide along the track 17, thereby facilitating the installation and removal of the transformer winding. It should be noted that the track 17 has a notch in the part that overlaps with the slide groove 11. The movable door 2 can be inserted into the notch when it falls to ensure the shielding effect of the shielding cover body 1.

[0026] A winding deformation detector 20 is fixedly installed in the middle of the outer side wall of the shield body 1. It should be noted that the winding deformation detector 20 is a commercially available model. It can be connected to the transformer winding by wires and the deformation of the transformer winding can be detected by frequency response method and short-circuit impedance method.

[0027] Working principle of this utility model:

[0028] When this device detects deformation in transformer windings, it first controls the motor 16 to rotate. The motor 16 drives the transmission shaft 13 to rotate through the worm gear transmission box. The transmission shaft 13 drives the transmission gear 14 to rotate, and the transmission gear 14 drives the rack 15 to move, causing the rack 15 to move upward. The rack 15 drives the movable door 2 and the top plate 4 to move upward. At this time, the front of the shielding cover body 1 opens. The transformer winding to be tested is then placed on the slide table 18, and the slide table 18 is pushed to slide along the track 17 until the slide table 18 drives the transformer winding to slide into the interior of the shielding cover body 1. Then, the motor 16 is controlled to reverse until the movable door 2 and the top plate 4 are reset. At this time, the shielding cover body 1, the movable door 2, and the top plate 4 form a closed structure for the transformer winding, which can prevent electromagnetic interference from the external environment to the transformer winding during the testing process.

[0029] After the transformer winding is pushed into the shield body 1, the connecting wire of the winding deformation detector 20 is connected to the transformer winding. The winding deformation detector 20 can then be used to detect the transformer winding. The winding deformation detector 20 detects the deformation of the transformer winding by means of frequency response method and short-circuit impedance method. The frequency response method determines whether the winding is deformed by measuring the frequency response characteristics of the winding. The short-circuit impedance method assesses the deformation by measuring the short-circuit impedance of the winding. One or two methods can be selected according to the actual situation to complete the detection of the transformer winding.

[0030] During the testing process, current needs to be passed through the transformer windings. The current causes the transformer windings to release heat during the testing process. The heat accumulates inside the shielding cover body 1 and heats the air inside the shielding cover body 1. The heated air rises to the top inside the shielding cover body 1 and exchanges heat with the horizontal part 6 of the heat-conducting copper pipe 5 through the heat-conducting fins 7. The heat-conducting copper pipe 5 exchanges heat with the outside air through the heat dissipation fins 9 on the inclined part 8, so as to achieve the effect of dissipating heat inside the shielding cover body 1. In addition, during this process, the cooling fan 10 drives the outside air to flow over the surface of the heat dissipation fins 9 to improve its heat exchange efficiency, thereby ensuring that the inside of the shielding cover body 1 does not overheat.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-interference shielding cover for detecting transformer winding deformation, comprising a shielding cover body (1) and a movable door (2) slidably disposed inside the shielding cover body (1), characterized in that: The shield body (1) has a through groove (3) at its top. A top plate (4) is slidably provided inside the through groove (3). The top plate (4) is fixedly located at the top inner side of the movable door (2). Multiple heat-conducting copper pipes (5) are fixedly provided in the middle of the top plate (4). A horizontal part (6) is fixedly provided at the bottom end of the heat-conducting copper pipes (5). The horizontal part (6) is located below the top plate (4). Multiple heat-conducting fins (7) are horizontally fixedly provided in the middle of the horizontal part (6). All the plates (7) are vertically arranged, and all the heat-conducting fins (7) are set in a wave structure. The top end of the heat-conducting copper tube (5) is fixedly provided with an inclined part (8), and the inclined part (8) is located above the top plate (4). The middle part of the inclined part (8) is fixedly provided with multiple heat dissipation fins (9), and the heat dissipation fins (9) are set in an inclined structure. The upper surface of the top plate (4) is horizontally and sequentially fixed with multiple heat dissipation fans (10), and the multiple heat dissipation fans (10) are respectively located at one end of the heat dissipation fins (9).

2. The anti-interference shielding cover for transformer winding deformation detection according to claim 1, characterized in that: The shield body (1) has sliding grooves (11) on both sides of its inner wall, and the movable door (2) has sliders (12) fixed on both sides. The two sliders (12) are slidably disposed in the two sliding grooves (11).

3. The anti-interference shielding cover for transformer winding deformation detection according to claim 1, characterized in that: The outer side wall of the shield body (1) is rotatably provided with a drive shaft (13), and both ends of the drive shaft (13) are fixedly provided with drive gears (14). The outer side of the movable door (2) is fixedly provided with two racks (15), and the two racks (15) are respectively meshed with the two drive gears (14).

4. The anti-interference shielding cover for transformer winding deformation detection according to claim 3, characterized in that: A motor (16) is fixedly installed at the top of the outer wall of the shield body (1), and a worm gear transmission box is provided between the output shaft of the motor (16) and one end of the transmission shaft (13).

5. The anti-interference shielding cover for transformer winding deformation detection according to claim 1, characterized in that: The bottom end of the shield body (1) is fixedly provided with a track (17), and a slide (18) is provided above the track (17). The four corners of the lower surface of the slide (18) are provided with pulleys (19) that are compatible with the track (17).

6. The anti-interference shielding cover for transformer winding deformation detection according to claim 1, characterized in that: A winding deformation detector (20) is fixedly installed in the middle of the outer side wall of the shield body (1).

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