Supporting strip structure of low-voltage coil

Abstract

The utility model relates to the field of low-voltage coils, and discloses a stay structure of a low-voltage coil, which comprises a mounting plate, an iron core body is arranged on the top surface of the mounting plate, a plurality of filling iron cores are respectively arranged on two sides of the iron core body, and a plurality of metal coils are wound on the surfaces of the iron core body and the filling iron cores. A plurality of retaining and supporting plates are arranged between the iron core body and the metal coil and between the filling iron core and the metal coil, a protective cover is detachably arranged above the mounting plate, and a base is detachably arranged on the bottom surface of the mounting plate. According to the utility model, a worker can install a plurality of retaining and supporting plates between the filling iron core and the metal coil and between the iron core body and the metal coil, and the space between the iron core body and the filling iron core is filled with the retaining and supporting plates, so that the metal coil can be tightly supported on the surface of the iron core, and the anti-short-circuit capability of the metal coil is improved; the stress of the metal coil on the iron core during short circuit is reduced, and the use safety of the transformer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage coils, in particular to a support bar structure of a low-voltage coil. Background Art

[0002] As the country vigorously promotes the energy conservation and environmental protection requirements of railway power equipment, low-loss and low-noise wound iron core traction transformers will become the mainstream products of railway transformers in the future. At present, due to the high voltage and large capacity wound iron core transformers, the coils cannot be wound individually, so they must be wound as a whole.

[0003] According to the Chinese patent with publication number: CN123733591U, a novel low-voltage foil-wound coil oil-immersed transformer includes a foil coil with a lead-out structure, characterized in that: an iron core is provided at each end of the foil coil with a lead-out structure, the iron core is connected to the foil coil by a clamp, the foil coil is provided with a low-voltage coil head end lead-out row and a low-voltage coil tail end lead-out row, and insulation between the low-voltage coil head end lead-out row and the low-voltage coil tail end lead-out row is provided between the head and tail lead-out row, insulation between the iron core and the lead-out row and insulation between the clamp and the lead-out row are provided at one end of the iron core, the low-voltage coil head end lead-out row and the low-voltage coil tail end lead-out row are connected to the transformer low-voltage bushing through a connecting flexible wiring piece, and a heat dissipation corrugated plate is provided on the oil tank wall of the transformer.

[0004] In the above scheme, the coil and the iron core are connected by a clamp, which still has the following disadvantages: due to the different height differences on the iron core, when the coil is connected to the iron core, it may be deformed inward due to external force, which will cause the reactance change to exceed the standard, resulting in a significant increase in the no-load loss and no-load current of the transformer, and low safety during use. Summary of the invention

[0005] The purpose of the utility model is to provide a support bar structure for a low-voltage coil to solve the problem that when the coil is connected to the iron core, it may be deformed and concave due to external force, which will cause the reactance change to exceed the standard, resulting in a significant increase in the no-load loss and no-load current of the transformer and low safety during use.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: a support bar structure for a low-voltage coil, including a mounting plate, a core body is arranged on the top surface of the mounting plate, a plurality of filling cores are arranged on both sides of the core body, a plurality of metal coils are surrounded by the surface of the core body and the filling core, a plurality of support plates are arranged between the core body, the filling core and the metal coils, a protective cover is detachably arranged on the top of the mounting plate, and a base is detachably arranged on the bottom surface of the mounting plate.

[0007] Preferably, two connecting plates are fixed on both sides of the protective cover, a through hole is provided on one side of the connecting plate, and two limiting holes are provided on both sides of the base, a limiting pin is slidably inserted inside the through hole, and one end of the limiting pin passes through the through hole and is slidably inserted with the limiting hole.

[0008] Preferably, a plurality of connecting holes are provided on the top surface of the mounting plate, and a plurality of fixing holes are provided on the top surface of the base. A fixing bolt is slidably inserted into the interior of the connecting hole, one end of the fixing bolt passes through the connecting hole and is slidably inserted into the fixing hole, and one end of the fixing bolt passing through the fixing hole is threadedly connected with a nut.

[0009] Preferably, a vent is formed on the top surface of the mounting plate, a vent is formed on the top surface of the base, and straight-through openings are formed on four sides of the base.

[0010] Preferably, a plurality of fixing holes are opened on the top surface of the base, one end of the fixing bolt passes through the connecting hole and is slidably inserted into the fixing hole, and one end of the fixing bolt passing through the fixing hole is threadedly connected with a nut.

[0011] Preferably, a plurality of limiting columns are fixed to the top surface of the mounting plate.

[0012] Compared with the prior art, the support bar structure of a low-voltage coil using the above technical solution has the following beneficial effects:

[0013] 1. When assembling the transformer, the staff will first install the core body on the top surface of the mounting plate. Then, in order to conform to the shape of the transformer, the staff will install the filling core on both sides of the core body, so that the core body and the filling core cooperate to form an ellipse-like shape. Then, the staff will install multiple support plates between the filling core and the metal coil and between the core body and the metal coil. The support plates are used to fill the space between the core body and the filling core, so that the metal coil can be tightened on the surface of the core, thereby improving the short-circuit resistance of the metal coil, reducing the force of the metal coil on the core during short circuit, and increasing the safety of the transformer when in use;

[0014] 2. After the coil is assembled, the staff will buckle the protective cover on the surface of the metal coil. During this process, the protective cover and the connecting plate move downward, and in the process of the connecting plate moving downward, the center of the penetration hole and the limit hole are driven to be in the same straight line. Then the staff will insert the limit pin into the inside of the penetration hole and the limit hole to fix the position of the protective cover, prevent the staff's palm or other impurities from contacting the metal coil, and increase the safety of the staff at work;

[0015] 3. The metal coil will generate heat during operation, and the generated heat will be dissipated inside the protective cover. The heat inside the protective cover will be discharged to the external environment through the air vents, vents and straight-through ports, which can reduce the temperature inside the protective cover. In addition, the protective cover and the base are arranged at the upper and lower ends of the connecting plate, so there is a large gap between the protective cover and the base, and the heat can also be discharged through the air between the protective cover and the base to prevent the transformer from malfunctioning due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 It is an exploded perspective schematic diagram of an embodiment.

[0018] Figure 3 It is a schematic diagram of the explosion of the mounting plate and the support plate in the embodiment.

[0019] Figure 4 It is an exploded schematic diagram of the mounting plate and the base in the embodiment.

[0020] In the figure: 1. Mounting plate; 2. Core body; 3. Filling core; 4. Metal coil; 5. Support plate; 6. Base; 7. Protective cover; 8. Connecting plate; 9. Through hole; 10. Limit hole; 11. Limit pin; 12. Through port; 13. Connecting hole; 14. Fixing hole; 15. Fixing bolt; 16. Nut; 17. Limit column; 18. Air vent; 19. Vent. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 3 As shown, a support bar structure of a low-voltage coil includes a mounting plate 1, a core body 2 is arranged on the top surface of the mounting plate 1, a plurality of filling cores 3 are arranged on both sides of the core body 2, a plurality of metal coils 4 are surrounded by the surfaces of the core body 2 and the filling cores 3, a plurality of support plates 5 are arranged between the core body 2, the filling cores 3 and the metal coils 4, a protective cover 7 is detachably arranged on the top of the mounting plate 1, and a base 6 is detachably arranged on the bottom surface of the mounting plate 1.

[0023] During use, when assembling the transformer, the staff will first install the core body 2 on the top surface of the mounting plate 1, and then in order to conform to the shape of the transformer, the staff will install the filling core 3 on both sides of the core body 2, so that the core body 2 and the filling core 3 cooperate to form an ellipse-like shape, and then the staff will install multiple support plates 5 between the filling core 3 and the metal coil 4 and between the core body 2 and the metal coil 4. The support plates 5 are used to fill the space between the core body 2 and the filling core 3, so that the metal coil 4 can be tightened on the surface of the core, thereby improving the short-circuit resistance of the metal coil 4, reducing the force of the metal coil 4 on the core during short circuit, and increasing the safety of the transformer when in use.

[0024] like Figure 1-Figure 3 As shown, two connecting plates 8 are fixed on both sides of the protective cover 7, a through hole 9 is provided on one side of the connecting plate 8, and two limiting holes 10 are provided on both sides of the base 6. A limiting pin 11 is slidably inserted inside the through hole 9, one end of the limiting pin 11 passes through the through hole 9 and is slidably inserted with the limiting hole 10, and a plurality of limiting columns 17 are fixed on the top surface of the mounting plate 1.

[0025] During use, after the coil is assembled, the staff will buckle the protective cover 7 on the surface of the metal coil 4. During this process, the protective cover 7 and the connecting plate 8 move downward, and in the process of the connecting plate 8 moving downward, the through hole 9 and the center of the limiting hole 10 are driven to be in the same straight line. Then the staff will insert the limiting pin 11 into the inside of the through hole 9 and the limiting hole 10 to fix the position of the protective cover 7, prevent the staff's palms or other impurities from contacting the metal coil 4, and increase the safety of the staff at work.

[0026] like Figure 2-Figure 4 As shown, a plurality of connecting holes 13 are provided on the top surface of the mounting plate 1, a fixing bolt 15 is slidably inserted inside the connecting hole 13, one end of the fixing bolt 15 passes through the connecting hole 13 and is slidably inserted with the fixing hole 14, a plurality of fixing holes 14 are provided on the top surface of the base 6, one end of the fixing bolt 15 passes through the fixing hole 14 and is threadedly connected with a nut 16, a vent 18 is provided on the top surface of the mounting plate 1, a vent 19 is provided on the top surface of the base 6, and straight through openings 12 are respectively provided on the four sides of the base 6.

[0027] During use, the metal coil 4 will generate heat during operation, and the generated heat will be dissipated inside the protective cover 7. The heat inside the protective cover 7 will be discharged to the external environment through the air vents 18, the vents 19 and the straight-through port 12, thereby reducing the temperature inside the protective cover 7. In addition, the protective cover 7 and the base 6 are arranged at the upper and lower ends of the connecting plate 8, so there is a large gap between the protective cover 7 and the base 6, and the heat can also be discharged through the air between the protective cover 7 and the base 6, thereby preventing the transformer from malfunctioning due to excessive temperature.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A support bar structure for a low voltage coil, comprising a mounting plate (1), characterized in that: The top surface of the mounting plate (1) is provided with an iron core body (2), and a plurality of filling iron cores (3) are respectively provided on both sides of the iron core body (2). The surfaces of the iron core body (2) and the filling iron core (3) are surrounded by a plurality of metal coils (4), and a plurality of support plates (5) are provided between the iron core body (2), the filling iron core (3) and the metal coils (4). A protective cover (7) is detachably provided above the mounting plate (1), and a base (6) is detachably provided on the bottom surface of the mounting plate (1).

2. A low voltage coil support structure according to claim 1, characterized in that: Two connecting plates (8) are fixed on both sides of the protective cover (7), one side of the connecting plate (8) is provided with a through hole (9), and two limiting holes (10) are provided on both sides of the base (6), a limiting pin (11) is slidably inserted inside the through hole (9), and one end of the limiting pin (11) passes through the through hole (9) and is slidably inserted into the limiting hole (10).

3. The support bar structure of a low-voltage coil according to claim 1, characterized in that: A plurality of connection holes (13) are provided on the top surface of the mounting plate (1), and fixing bolts (15) are slidably inserted into the interior of the connection holes (13).

4. The support bar structure of a low-voltage coil according to claim 1, characterized in that: The top surface of the mounting plate (1) is provided with an air vent (18), the top surface of the base (6) is provided with a vent (19), and four sides of the base (6) are respectively provided with straight-through openings (12).

5. The support bar structure of a low-voltage coil according to claim 3, characterized in that: A plurality of fixing holes (14) are formed on the top surface of the base (6); one end of the fixing bolt (15) passes through the connection hole (13) and is slidably inserted into the fixing hole (14); one end of the fixing bolt (15) passing through the fixing hole (14) is threadedly connected to a nut (16).

6. The support bar structure of a low-voltage coil according to claim 1, characterized in that: A plurality of limiting columns (17) are fixed to the top surface of the mounting plate (1).

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